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681
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/**
* @file
* @defgroup altcp Application layered TCP Functions
* @ingroup altcp_api
*
* This file contains the common functions for altcp to work.
* For more details see @ref altcp_api.
*/
/**
* @defgroup altcp_api Application layered TCP Introduction
* @ingroup callbackstyle_api
*
* Overview
* --------
* altcp (application layered TCP connection API; to be used from TCPIP thread)
* is an abstraction layer that prevents applications linking hard against the
* @ref tcp.h functions while providing the same functionality. It is used to
* e.g. add SSL/TLS (see LWIP_ALTCP_TLS) or proxy-connect support to an application
* written for the tcp callback API without that application knowing the
* protocol details.
*
* * This interface mimics the tcp callback API to the application while preventing
* direct linking (much like virtual functions).
* * This way, an application can make use of other application layer protocols
* on top of TCP without knowing the details (e.g. TLS, proxy connection).
* * This is achieved by simply including "lwip/altcp.h" instead of "lwip/tcp.h",
* replacing "struct tcp_pcb" with "struct altcp_pcb" and prefixing all functions
* with "altcp_" instead of "tcp_".
*
* With altcp support disabled (LWIP_ALTCP==0), applications written against the
* altcp API can still be compiled but are directly linked against the tcp.h
* callback API and then cannot use layered protocols. To minimize code changes
* in this case, the use of altcp_allocators is strongly suggested.
*
* Usage
* -----
* To make use of this API from an existing tcp raw API application:
* * Include "lwip/altcp.h" instead of "lwip/tcp.h"
* * Replace "struct tcp_pcb" with "struct altcp_pcb"
* * Prefix all called tcp API functions with "altcp_" instead of "tcp_" to link
* against the altcp functions
* * @ref altcp_new (and @ref altcp_new_ip_type/@ref altcp_new_ip6) take
* an @ref altcp_allocator_t as an argument, whereas the original tcp API
* functions take no arguments.
* * An @ref altcp_allocator_t allocator is an object that holds a pointer to an
* allocator object and a corresponding state (e.g. for TLS, the corresponding
* state may hold certificates or keys). This way, the application does not
* even need to know if it uses TLS or pure TCP, this is handled at runtime
* by passing a specific allocator.
* * An application can alternatively bind hard to the altcp_tls API by calling
* @ref altcp_tls_new or @ref altcp_tls_wrap.
* * The TLS layer is not directly implemented by lwIP, but a port to mbedTLS is
* provided.
* * Another altcp layer is proxy-connect to use TLS behind a HTTP proxy (see
* @ref altcp_proxyconnect.h)
*
* altcp_allocator_t
* -----------------
* An altcp allocator is created by the application by combining an allocator
* callback function and a corresponding state, e.g.:\code{.c}
* static const unsigned char cert[] = {0x2D, ... (see mbedTLS doc for how to create this)};
* struct altcp_tls_config * conf = altcp_tls_create_config_client(cert, sizeof(cert));
* altcp_allocator_t tls_allocator = {
* altcp_tls_alloc, conf
* };
* \endcode
*
*
* struct altcp_tls_config
* -----------------------
* The struct altcp_tls_config holds state that is needed to create new TLS client
* or server connections (e.g. certificates and private keys).
*
* It is not defined by lwIP itself but by the TLS port (e.g. altcp_tls to mbedTLS
* adaption). However, the parameters used to create it are defined in @ref
* altcp_tls.h (see @ref altcp_tls_create_config_server_privkey_cert for servers
* and @ref altcp_tls_create_config_client/@ref altcp_tls_create_config_client_2wayauth
* for clients).
*
* For mbedTLS, ensure that certificates can be parsed by 'mbedtls_x509_crt_parse()' and
* private keys can be parsed by 'mbedtls_pk_parse_key()'.
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#include "lwip/opt.h"
#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
#include "lwip/altcp.h"
#include "lwip/priv/altcp_priv.h"
#include "lwip/altcp_tcp.h"
#include "lwip/tcp.h"
#include "lwip/mem.h"
#include <string.h>
extern const struct altcp_functions altcp_tcp_functions;
/**
* For altcp layer implementations only: allocate a new struct altcp_pcb from the pool
* and zero the memory
*/
struct altcp_pcb *
altcp_alloc(void)
{
struct altcp_pcb *ret = (struct altcp_pcb *)memp_malloc(MEMP_ALTCP_PCB);
if (ret != NULL) {
memset(ret, 0, sizeof(struct altcp_pcb));
}
return ret;
}
/**
* For altcp layer implementations only: return a struct altcp_pcb to the pool
*/
void
altcp_free(struct altcp_pcb *conn)
{
if (conn) {
if (conn->fns && conn->fns->dealloc) {
conn->fns->dealloc(conn);
}
memp_free(MEMP_ALTCP_PCB, conn);
}
}
/**
* @ingroup altcp
* altcp_new_ip6: @ref altcp_new for IPv6
*/
struct altcp_pcb *
altcp_new_ip6(altcp_allocator_t *allocator)
{
return altcp_new_ip_type(allocator, IPADDR_TYPE_V6);
}
/**
* @ingroup altcp
* altcp_new: @ref altcp_new for IPv4
*/
struct altcp_pcb *
altcp_new(altcp_allocator_t *allocator)
{
return altcp_new_ip_type(allocator, IPADDR_TYPE_V4);
}
/**
* @ingroup altcp
* altcp_new_ip_type: called by applications to allocate a new pcb with the help of an
* allocator function.
*
* @param allocator allocator function and argument
* @param ip_type IP version of the pcb (@ref lwip_ip_addr_type)
* @return a new altcp_pcb or NULL on error
*/
struct altcp_pcb *
altcp_new_ip_type(altcp_allocator_t *allocator, u8_t ip_type)
{
struct altcp_pcb *conn;
if (allocator == NULL) {
/* no allocator given, create a simple TCP connection */
return altcp_tcp_new_ip_type(ip_type);
}
if (allocator->alloc == NULL) {
/* illegal allocator */
return NULL;
}
conn = allocator->alloc(allocator->arg, ip_type);
if (conn == NULL) {
/* allocation failed */
return NULL;
}
return conn;
}
/**
* @ingroup altcp
* @see tcp_arg()
*/
void
altcp_arg(struct altcp_pcb *conn, void *arg)
{
if (conn) {
conn->arg = arg;
}
}
/**
* @ingroup altcp
* @see tcp_accept()
*/
void
altcp_accept(struct altcp_pcb *conn, altcp_accept_fn accept)
{
if (conn != NULL) {
conn->accept = accept;
}
}
/**
* @ingroup altcp
* @see tcp_recv()
*/
void
altcp_recv(struct altcp_pcb *conn, altcp_recv_fn recv)
{
if (conn) {
conn->recv = recv;
}
}
/**
* @ingroup altcp
* @see tcp_sent()
*/
void
altcp_sent(struct altcp_pcb *conn, altcp_sent_fn sent)
{
if (conn) {
conn->sent = sent;
}
}
/**
* @ingroup altcp
* @see tcp_poll()
*/
void
altcp_poll(struct altcp_pcb *conn, altcp_poll_fn poll, u8_t interval)
{
if (conn) {
conn->poll = poll;
conn->pollinterval = interval;
if (conn->fns && conn->fns->set_poll) {
conn->fns->set_poll(conn, interval);
}
}
}
/**
* @ingroup altcp
* @see tcp_err()
*/
void
altcp_err(struct altcp_pcb *conn, altcp_err_fn err)
{
if (conn) {
conn->err = err;
}
}
/* Generic functions calling the "virtual" ones */
/**
* @ingroup altcp
* @see tcp_recved()
*/
void
altcp_recved(struct altcp_pcb *conn, u16_t len)
{
if (conn && conn->fns && conn->fns->recved) {
conn->fns->recved(conn, len);
}
}
/**
* @ingroup altcp
* @see tcp_bind()
*/
err_t
altcp_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port)
{
if (conn && conn->fns && conn->fns->bind) {
return conn->fns->bind(conn, ipaddr, port);
}
return ERR_VAL;
}
/**
* @ingroup altcp
* @see tcp_connect()
*/
err_t
altcp_connect(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected)
{
if (conn && conn->fns && conn->fns->connect) {
return conn->fns->connect(conn, ipaddr, port, connected);
}
return ERR_VAL;
}
/**
* @ingroup altcp
* @see tcp_listen_with_backlog_and_err()
*/
struct altcp_pcb *
altcp_listen_with_backlog_and_err(struct altcp_pcb *conn, u8_t backlog, err_t *err)
{
if (conn && conn->fns && conn->fns->listen) {
return conn->fns->listen(conn, backlog, err);
}
return NULL;
}
/**
* @ingroup altcp
* @see tcp_abort()
*/
void
altcp_abort(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->abort) {
conn->fns->abort(conn);
}
}
/**
* @ingroup altcp
* @see tcp_close()
*/
err_t
altcp_close(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->close) {
return conn->fns->close(conn);
}
return ERR_VAL;
}
/**
* @ingroup altcp
* @see tcp_shutdown()
*/
err_t
altcp_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx)
{
if (conn && conn->fns && conn->fns->shutdown) {
return conn->fns->shutdown(conn, shut_rx, shut_tx);
}
return ERR_VAL;
}
/**
* @ingroup altcp
* @see tcp_write()
*/
err_t
altcp_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags)
{
if (conn && conn->fns && conn->fns->write) {
return conn->fns->write(conn, dataptr, len, apiflags);
}
return ERR_VAL;
}
/**
* @ingroup altcp
* @see tcp_output()
*/
err_t
altcp_output(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->output) {
return conn->fns->output(conn);
}
return ERR_VAL;
}
/**
* @ingroup altcp
* @see tcp_mss()
*/
u16_t
altcp_mss(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->mss) {
return conn->fns->mss(conn);
}
return 0;
}
/**
* @ingroup altcp
* @see tcp_sndbuf()
*/
u16_t
altcp_sndbuf(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->sndbuf) {
return conn->fns->sndbuf(conn);
}
return 0;
}
/**
* @ingroup altcp
* @see tcp_sndqueuelen()
*/
u16_t
altcp_sndqueuelen(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->sndqueuelen) {
return conn->fns->sndqueuelen(conn);
}
return 0;
}
void
altcp_nagle_disable(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->nagle_disable) {
conn->fns->nagle_disable(conn);
}
}
void
altcp_nagle_enable(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->nagle_enable) {
conn->fns->nagle_enable(conn);
}
}
int
altcp_nagle_disabled(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->nagle_disabled) {
return conn->fns->nagle_disabled(conn);
}
return 0;
}
/**
* @ingroup altcp
* @see tcp_setprio()
*/
void
altcp_setprio(struct altcp_pcb *conn, u8_t prio)
{
if (conn && conn->fns && conn->fns->setprio) {
conn->fns->setprio(conn, prio);
}
}
err_t
altcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port)
{
if (conn && conn->fns && conn->fns->addrinfo) {
return conn->fns->addrinfo(conn, local, addr, port);
}
return ERR_VAL;
}
ip_addr_t *
altcp_get_ip(struct altcp_pcb *conn, int local)
{
if (conn && conn->fns && conn->fns->getip) {
return conn->fns->getip(conn, local);
}
return NULL;
}
u16_t
altcp_get_port(struct altcp_pcb *conn, int local)
{
if (conn && conn->fns && conn->fns->getport) {
return conn->fns->getport(conn, local);
}
return 0;
}
#ifdef LWIP_DEBUG
enum tcp_state
altcp_dbg_get_tcp_state(struct altcp_pcb *conn)
{
if (conn && conn->fns && conn->fns->dbg_get_tcp_state) {
return conn->fns->dbg_get_tcp_state(conn);
}
return CLOSED;
}
#endif
/* Default implementations for the "virtual" functions */
void
altcp_default_set_poll(struct altcp_pcb *conn, u8_t interval)
{
if (conn && conn->inner_conn) {
altcp_poll(conn->inner_conn, conn->poll, interval);
}
}
void
altcp_default_recved(struct altcp_pcb *conn, u16_t len)
{
if (conn && conn->inner_conn) {
altcp_recved(conn->inner_conn, len);
}
}
err_t
altcp_default_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port)
{
if (conn && conn->inner_conn) {
return altcp_bind(conn->inner_conn, ipaddr, port);
}
return ERR_VAL;
}
err_t
altcp_default_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx)
{
if (conn) {
if (shut_rx && shut_tx && conn->fns && conn->fns->close) {
/* default shutdown for both sides is close */
return conn->fns->close(conn);
}
if (conn->inner_conn) {
return altcp_shutdown(conn->inner_conn, shut_rx, shut_tx);
}
}
return ERR_VAL;
}
err_t
altcp_default_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags)
{
if (conn && conn->inner_conn) {
return altcp_write(conn->inner_conn, dataptr, len, apiflags);
}
return ERR_VAL;
}
err_t
altcp_default_output(struct altcp_pcb *conn)
{
if (conn && conn->inner_conn) {
return altcp_output(conn->inner_conn);
}
return ERR_VAL;
}
u16_t
altcp_default_mss(struct altcp_pcb *conn)
{
if (conn && conn->inner_conn) {
return altcp_mss(conn->inner_conn);
}
return 0;
}
u16_t
altcp_default_sndbuf(struct altcp_pcb *conn)
{
if (conn && conn->inner_conn) {
return altcp_sndbuf(conn->inner_conn);
}
return 0;
}
u16_t
altcp_default_sndqueuelen(struct altcp_pcb *conn)
{
if (conn && conn->inner_conn) {
return altcp_sndqueuelen(conn->inner_conn);
}
return 0;
}
void
altcp_default_nagle_disable(struct altcp_pcb *conn)
{
if (conn && conn->inner_conn) {
altcp_nagle_disable(conn->inner_conn);
}
}
void
altcp_default_nagle_enable(struct altcp_pcb *conn)
{
if (conn && conn->inner_conn) {
altcp_nagle_enable(conn->inner_conn);
}
}
int
altcp_default_nagle_disabled(struct altcp_pcb *conn)
{
if (conn && conn->inner_conn) {
return altcp_nagle_disabled(conn->inner_conn);
}
return 0;
}
void
altcp_default_setprio(struct altcp_pcb *conn, u8_t prio)
{
if (conn && conn->inner_conn) {
altcp_setprio(conn->inner_conn, prio);
}
}
void
altcp_default_dealloc(struct altcp_pcb *conn)
{
LWIP_UNUSED_ARG(conn);
/* nothing to do */
}
err_t
altcp_default_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port)
{
if (conn && conn->inner_conn) {
return altcp_get_tcp_addrinfo(conn->inner_conn, local, addr, port);
}
return ERR_VAL;
}
ip_addr_t *
altcp_default_get_ip(struct altcp_pcb *conn, int local)
{
if (conn && conn->inner_conn) {
return altcp_get_ip(conn->inner_conn, local);
}
return NULL;
}
u16_t
altcp_default_get_port(struct altcp_pcb *conn, int local)
{
if (conn && conn->inner_conn) {
return altcp_get_port(conn->inner_conn, local);
}
return 0;
}
#ifdef LWIP_DEBUG
enum tcp_state
altcp_default_dbg_get_tcp_state(struct altcp_pcb *conn)
{
if (conn && conn->inner_conn) {
return altcp_dbg_get_tcp_state(conn->inner_conn);
}
return CLOSED;
}
#endif
#endif /* LWIP_ALTCP */

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/**
* @file
* Application layered TCP connection API (to be used from TCPIP thread)\n
* This interface mimics the tcp callback API to the application while preventing
* direct linking (much like virtual functions).
* This way, an application can make use of other application layer protocols
* on top of TCP without knowing the details (e.g. TLS, proxy connection).
*
* This file contains allocation implementation that combine several layers.
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#include "lwip/opt.h"
#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
#include "lwip/altcp.h"
#include "lwip/altcp_tcp.h"
#include "lwip/altcp_tls.h"
#include "lwip/priv/altcp_priv.h"
#include "lwip/mem.h"
#include <string.h>
#if LWIP_ALTCP_TLS
/** This standard allocator function creates an altcp pcb for
* TLS over TCP */
struct altcp_pcb *
altcp_tls_new(struct altcp_tls_config *config, u8_t ip_type)
{
struct altcp_pcb *inner_conn, *ret;
LWIP_UNUSED_ARG(ip_type);
inner_conn = altcp_tcp_new_ip_type(ip_type);
if (inner_conn == NULL) {
return NULL;
}
ret = altcp_tls_wrap(config, inner_conn);
if (ret == NULL) {
altcp_close(inner_conn);
}
return ret;
}
/** This standard allocator function creates an altcp pcb for
* TLS over TCP */
struct altcp_pcb *
altcp_tls_alloc(void *arg, u8_t ip_type)
{
return altcp_tls_new((struct altcp_tls_config *)arg, ip_type);
}
#endif /* LWIP_ALTCP_TLS */
#endif /* LWIP_ALTCP */

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/**
* @file
* Application layered TCP connection API (to be used from TCPIP thread)\n
* This interface mimics the tcp callback API to the application while preventing
* direct linking (much like virtual functions).
* This way, an application can make use of other application layer protocols
* on top of TCP without knowing the details (e.g. TLS, proxy connection).
*
* This file contains the base implementation calling into tcp.
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#include "lwip/opt.h"
#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
#include "lwip/altcp.h"
#include "lwip/altcp_tcp.h"
#include "lwip/priv/altcp_priv.h"
#include "lwip/tcp.h"
#include "lwip/mem.h"
#include <string.h>
#define ALTCP_TCP_ASSERT_CONN(conn) do { \
LWIP_ASSERT("conn->inner_conn == NULL", (conn)->inner_conn == NULL); \
LWIP_UNUSED_ARG(conn); /* for LWIP_NOASSERT */ } while(0)
#define ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb) do { \
LWIP_ASSERT("pcb mismatch", (conn)->state == tpcb); \
LWIP_UNUSED_ARG(tpcb); /* for LWIP_NOASSERT */ \
ALTCP_TCP_ASSERT_CONN(conn); } while(0)
/* Variable prototype, the actual declaration is at the end of this file
since it contains pointers to static functions declared here */
extern const struct altcp_functions altcp_tcp_functions;
static void altcp_tcp_setup(struct altcp_pcb *conn, struct tcp_pcb *tpcb);
/* callback functions for TCP */
static err_t
altcp_tcp_accept(void *arg, struct tcp_pcb *new_tpcb, err_t err)
{
struct altcp_pcb *listen_conn = (struct altcp_pcb *)arg;
if (listen_conn && listen_conn->accept) {
/* create a new altcp_conn to pass to the next 'accept' callback */
struct altcp_pcb *new_conn = altcp_alloc();
if (new_conn == NULL) {
return ERR_MEM;
}
altcp_tcp_setup(new_conn, new_tpcb);
return listen_conn->accept(listen_conn->arg, new_conn, err);
}
return ERR_ARG;
}
static err_t
altcp_tcp_connected(void *arg, struct tcp_pcb *tpcb, err_t err)
{
struct altcp_pcb *conn = (struct altcp_pcb *)arg;
if (conn) {
ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb);
if (conn->connected) {
return conn->connected(conn->arg, conn, err);
}
}
return ERR_OK;
}
static err_t
altcp_tcp_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
{
struct altcp_pcb *conn = (struct altcp_pcb *)arg;
if (conn) {
ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb);
if (conn->recv) {
return conn->recv(conn->arg, conn, p, err);
}
}
if (p != NULL) {
/* prevent memory leaks */
pbuf_free(p);
}
return ERR_OK;
}
static err_t
altcp_tcp_sent(void *arg, struct tcp_pcb *tpcb, u16_t len)
{
struct altcp_pcb *conn = (struct altcp_pcb *)arg;
if (conn) {
ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb);
if (conn->sent) {
return conn->sent(conn->arg, conn, len);
}
}
return ERR_OK;
}
static err_t
altcp_tcp_poll(void *arg, struct tcp_pcb *tpcb)
{
struct altcp_pcb *conn = (struct altcp_pcb *)arg;
if (conn) {
ALTCP_TCP_ASSERT_CONN_PCB(conn, tpcb);
if (conn->poll) {
return conn->poll(conn->arg, conn);
}
}
return ERR_OK;
}
static void
altcp_tcp_err(void *arg, err_t err)
{
struct altcp_pcb *conn = (struct altcp_pcb *)arg;
if (conn) {
conn->state = NULL; /* already freed */
if (conn->err) {
conn->err(conn->arg, err);
}
altcp_free(conn);
}
}
/* setup functions */
static void
altcp_tcp_remove_callbacks(struct tcp_pcb *tpcb)
{
tcp_arg(tpcb, NULL);
tcp_recv(tpcb, NULL);
tcp_sent(tpcb, NULL);
tcp_err(tpcb, NULL);
tcp_poll(tpcb, NULL, tpcb->pollinterval);
}
static void
altcp_tcp_setup_callbacks(struct altcp_pcb *conn, struct tcp_pcb *tpcb)
{
tcp_arg(tpcb, conn);
tcp_recv(tpcb, altcp_tcp_recv);
tcp_sent(tpcb, altcp_tcp_sent);
tcp_err(tpcb, altcp_tcp_err);
/* tcp_poll is set when interval is set by application */
/* listen is set totally different :-) */
}
static void
altcp_tcp_setup(struct altcp_pcb *conn, struct tcp_pcb *tpcb)
{
altcp_tcp_setup_callbacks(conn, tpcb);
conn->state = tpcb;
conn->fns = &altcp_tcp_functions;
}
struct altcp_pcb *
altcp_tcp_new_ip_type(u8_t ip_type)
{
/* Allocate the tcp pcb first to invoke the priority handling code
if we're out of pcbs */
struct tcp_pcb *tpcb = tcp_new_ip_type(ip_type);
if (tpcb != NULL) {
struct altcp_pcb *ret = altcp_alloc();
if (ret != NULL) {
altcp_tcp_setup(ret, tpcb);
return ret;
} else {
/* altcp_pcb allocation failed -> free the tcp_pcb too */
tcp_close(tpcb);
}
}
return NULL;
}
/** altcp_tcp allocator function fitting to @ref altcp_allocator_t / @ref altcp_new.
*
* arg pointer is not used for TCP.
*/
struct altcp_pcb *
altcp_tcp_alloc(void *arg, u8_t ip_type)
{
LWIP_UNUSED_ARG(arg);
return altcp_tcp_new_ip_type(ip_type);
}
struct altcp_pcb *
altcp_tcp_wrap(struct tcp_pcb *tpcb)
{
if (tpcb != NULL) {
struct altcp_pcb *ret = altcp_alloc();
if (ret != NULL) {
altcp_tcp_setup(ret, tpcb);
return ret;
}
}
return NULL;
}
/* "virtual" functions calling into tcp */
static void
altcp_tcp_set_poll(struct altcp_pcb *conn, u8_t interval)
{
if (conn != NULL) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
tcp_poll(pcb, altcp_tcp_poll, interval);
}
}
static void
altcp_tcp_recved(struct altcp_pcb *conn, u16_t len)
{
if (conn != NULL) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
tcp_recved(pcb, len);
}
}
static err_t
altcp_tcp_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return ERR_VAL;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
return tcp_bind(pcb, ipaddr, port);
}
static err_t
altcp_tcp_connect(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return ERR_VAL;
}
ALTCP_TCP_ASSERT_CONN(conn);
conn->connected = connected;
pcb = (struct tcp_pcb *)conn->state;
return tcp_connect(pcb, ipaddr, port, altcp_tcp_connected);
}
static struct altcp_pcb *
altcp_tcp_listen(struct altcp_pcb *conn, u8_t backlog, err_t *err)
{
struct tcp_pcb *pcb;
struct tcp_pcb *lpcb;
if (conn == NULL) {
return NULL;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
lpcb = tcp_listen_with_backlog_and_err(pcb, backlog, err);
if (lpcb != NULL) {
conn->state = lpcb;
tcp_accept(lpcb, altcp_tcp_accept);
return conn;
}
return NULL;
}
static void
altcp_tcp_abort(struct altcp_pcb *conn)
{
if (conn != NULL) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
if (pcb) {
tcp_abort(pcb);
}
}
}
static err_t
altcp_tcp_close(struct altcp_pcb *conn)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return ERR_VAL;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
if (pcb) {
err_t err;
tcp_poll_fn oldpoll = pcb->poll;
altcp_tcp_remove_callbacks(pcb);
err = tcp_close(pcb);
if (err != ERR_OK) {
/* not closed, set up all callbacks again */
altcp_tcp_setup_callbacks(conn, pcb);
/* poll callback is not included in the above */
tcp_poll(pcb, oldpoll, pcb->pollinterval);
return err;
}
conn->state = NULL; /* unsafe to reference pcb after tcp_close(). */
}
altcp_free(conn);
return ERR_OK;
}
static err_t
altcp_tcp_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return ERR_VAL;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
return tcp_shutdown(pcb, shut_rx, shut_tx);
}
static err_t
altcp_tcp_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return ERR_VAL;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
return tcp_write(pcb, dataptr, len, apiflags);
}
static err_t
altcp_tcp_output(struct altcp_pcb *conn)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return ERR_VAL;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
return tcp_output(pcb);
}
static u16_t
altcp_tcp_mss(struct altcp_pcb *conn)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return 0;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
return tcp_mss(pcb);
}
static u16_t
altcp_tcp_sndbuf(struct altcp_pcb *conn)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return 0;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
return tcp_sndbuf(pcb);
}
static u16_t
altcp_tcp_sndqueuelen(struct altcp_pcb *conn)
{
struct tcp_pcb *pcb;
if (conn == NULL) {
return 0;
}
ALTCP_TCP_ASSERT_CONN(conn);
pcb = (struct tcp_pcb *)conn->state;
return tcp_sndqueuelen(pcb);
}
static void
altcp_tcp_nagle_disable(struct altcp_pcb *conn)
{
if (conn && conn->state) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
tcp_nagle_disable(pcb);
}
}
static void
altcp_tcp_nagle_enable(struct altcp_pcb *conn)
{
if (conn && conn->state) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
tcp_nagle_enable(pcb);
}
}
static int
altcp_tcp_nagle_disabled(struct altcp_pcb *conn)
{
if (conn && conn->state) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
return tcp_nagle_disabled(pcb);
}
return 0;
}
static void
altcp_tcp_setprio(struct altcp_pcb *conn, u8_t prio)
{
if (conn != NULL) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
tcp_setprio(pcb, prio);
}
}
static void
altcp_tcp_dealloc(struct altcp_pcb *conn)
{
LWIP_UNUSED_ARG(conn);
ALTCP_TCP_ASSERT_CONN(conn);
/* no private state to clean up */
}
static err_t
altcp_tcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port)
{
if (conn) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
return tcp_tcp_get_tcp_addrinfo(pcb, local, addr, port);
}
return ERR_VAL;
}
static ip_addr_t *
altcp_tcp_get_ip(struct altcp_pcb *conn, int local)
{
if (conn) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
if (pcb) {
if (local) {
return &pcb->local_ip;
} else {
return &pcb->remote_ip;
}
}
}
return NULL;
}
static u16_t
altcp_tcp_get_port(struct altcp_pcb *conn, int local)
{
if (conn) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
if (pcb) {
if (local) {
return pcb->local_port;
} else {
return pcb->remote_port;
}
}
}
return 0;
}
#ifdef LWIP_DEBUG
static enum tcp_state
altcp_tcp_dbg_get_tcp_state(struct altcp_pcb *conn)
{
if (conn) {
struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
ALTCP_TCP_ASSERT_CONN(conn);
if (pcb) {
return pcb->state;
}
}
return CLOSED;
}
#endif
const struct altcp_functions altcp_tcp_functions = {
altcp_tcp_set_poll,
altcp_tcp_recved,
altcp_tcp_bind,
altcp_tcp_connect,
altcp_tcp_listen,
altcp_tcp_abort,
altcp_tcp_close,
altcp_tcp_shutdown,
altcp_tcp_write,
altcp_tcp_output,
altcp_tcp_mss,
altcp_tcp_sndbuf,
altcp_tcp_sndqueuelen,
altcp_tcp_nagle_disable,
altcp_tcp_nagle_enable,
altcp_tcp_nagle_disabled,
altcp_tcp_setprio,
altcp_tcp_dealloc,
altcp_tcp_get_tcp_addrinfo,
altcp_tcp_get_ip,
altcp_tcp_get_port
#ifdef LWIP_DEBUG
, altcp_tcp_dbg_get_tcp_state
#endif
};
#endif /* LWIP_ALTCP */

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/**
* @file
* Common functions used throughout the stack.
*
* These are reference implementations of the byte swapping functions.
* Again with the aim of being simple, correct and fully portable.
* Byte swapping is the second thing you would want to optimize. You will
* need to port it to your architecture and in your cc.h:
*
* \#define lwip_htons(x) your_htons
* \#define lwip_htonl(x) your_htonl
*
* Note lwip_ntohs() and lwip_ntohl() are merely references to the htonx counterparts.
*
* If you \#define them to htons() and htonl(), you should
* \#define LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS to prevent lwIP from
* defining htonx/ntohx compatibility macros.
* @defgroup sys_nonstandard Non-standard functions
* @ingroup sys_layer
* lwIP provides default implementations for non-standard functions.
* These can be mapped to OS functions to reduce code footprint if desired.
* All defines related to this section must not be placed in lwipopts.h,
* but in arch/cc.h!
* These options cannot be \#defined in lwipopts.h since they are not options
* of lwIP itself, but options of the lwIP port to your system.
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt
*
*/
#include "lwip/opt.h"
#include "lwip/def.h"
#include <string.h>
#if BYTE_ORDER == LITTLE_ENDIAN
#if !defined(lwip_htons)
/**
* Convert an u16_t from host- to network byte order.
*
* @param n u16_t in host byte order
* @return n in network byte order
*/
u16_t
lwip_htons(u16_t n)
{
return PP_HTONS(n);
}
#endif /* lwip_htons */
#if !defined(lwip_htonl)
/**
* Convert an u32_t from host- to network byte order.
*
* @param n u32_t in host byte order
* @return n in network byte order
*/
u32_t
lwip_htonl(u32_t n)
{
return PP_HTONL(n);
}
#endif /* lwip_htonl */
#endif /* BYTE_ORDER == LITTLE_ENDIAN */
#ifndef lwip_strnstr
/**
* @ingroup sys_nonstandard
* lwIP default implementation for strnstr() non-standard function.
* This can be \#defined to strnstr() depending on your platform port.
*/
char *
lwip_strnstr(const char *buffer, const char *token, size_t n)
{
const char *p;
size_t tokenlen = strlen(token);
if (tokenlen == 0) {
return LWIP_CONST_CAST(char *, buffer);
}
for (p = buffer; *p && (p + tokenlen <= buffer + n); p++) {
if ((*p == *token) && (strncmp(p, token, tokenlen) == 0)) {
return LWIP_CONST_CAST(char *, p);
}
}
return NULL;
}
#endif
#ifndef lwip_stricmp
/**
* @ingroup sys_nonstandard
* lwIP default implementation for stricmp() non-standard function.
* This can be \#defined to stricmp() depending on your platform port.
*/
int
lwip_stricmp(const char *str1, const char *str2)
{
char c1, c2;
do {
c1 = *str1++;
c2 = *str2++;
if (c1 != c2) {
char c1_upc = c1 | 0x20;
if ((c1_upc >= 'a') && (c1_upc <= 'z')) {
/* characters are not equal an one is in the alphabet range:
downcase both chars and check again */
char c2_upc = c2 | 0x20;
if (c1_upc != c2_upc) {
/* still not equal */
/* don't care for < or > */
return 1;
}
} else {
/* characters are not equal but none is in the alphabet range */
return 1;
}
}
} while (c1 != 0);
return 0;
}
#endif
#ifndef lwip_strnicmp
/**
* @ingroup sys_nonstandard
* lwIP default implementation for strnicmp() non-standard function.
* This can be \#defined to strnicmp() depending on your platform port.
*/
int
lwip_strnicmp(const char *str1, const char *str2, size_t len)
{
char c1, c2;
do {
c1 = *str1++;
c2 = *str2++;
if (c1 != c2) {
char c1_upc = c1 | 0x20;
if ((c1_upc >= 'a') && (c1_upc <= 'z')) {
/* characters are not equal an one is in the alphabet range:
downcase both chars and check again */
char c2_upc = c2 | 0x20;
if (c1_upc != c2_upc) {
/* still not equal */
/* don't care for < or > */
return 1;
}
} else {
/* characters are not equal but none is in the alphabet range */
return 1;
}
}
len--;
} while ((len != 0) && (c1 != 0));
return 0;
}
#endif
#ifndef lwip_itoa
/**
* @ingroup sys_nonstandard
* lwIP default implementation for itoa() non-standard function.
* This can be \#defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform port.
*/
void
lwip_itoa(char *result, size_t bufsize, int number)
{
char *res = result;
char *tmp = result + bufsize - 1;
int n = (number >= 0) ? number : -number;
/* handle invalid bufsize */
if (bufsize < 2) {
if (bufsize == 1) {
*result = 0;
}
return;
}
/* First, add sign */
if (number < 0) {
*res++ = '-';
}
/* Then create the string from the end and stop if buffer full,
and ensure output string is zero terminated */
*tmp = 0;
while ((n != 0) && (tmp > res)) {
char val = (char)('0' + (n % 10));
tmp--;
*tmp = val;
n = n / 10;
}
if (n) {
/* buffer is too small */
*result = 0;
return;
}
if (*tmp == 0) {
/* Nothing added? */
*res++ = '0';
*res++ = 0;
return;
}
/* move from temporary buffer to output buffer (sign is not moved) */
memmove(res, tmp, (size_t)((result + bufsize) - tmp));
}
#endif

1636
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608
core/inet_chksum.c Executable file
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/**
* @file
* Internet checksum functions.\n
*
* These are some reference implementations of the checksum algorithm, with the
* aim of being simple, correct and fully portable. Checksumming is the
* first thing you would want to optimize for your platform. If you create
* your own version, link it in and in your cc.h put:
*
* \#define LWIP_CHKSUM your_checksum_routine
*
* Or you can select from the implementations below by defining
* LWIP_CHKSUM_ALGORITHM to 1, 2 or 3.
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#include "lwip/inet_chksum.h"
#include "lwip/def.h"
#include "lwip/ip_addr.h"
#include <string.h>
#ifndef LWIP_CHKSUM
# define LWIP_CHKSUM lwip_standard_chksum
# ifndef LWIP_CHKSUM_ALGORITHM
# define LWIP_CHKSUM_ALGORITHM 2
# endif
u16_t lwip_standard_chksum(const void *dataptr, int len);
#endif
/* If none set: */
#ifndef LWIP_CHKSUM_ALGORITHM
# define LWIP_CHKSUM_ALGORITHM 0
#endif
#if (LWIP_CHKSUM_ALGORITHM == 1) /* Version #1 */
/**
* lwip checksum
*
* @param dataptr points to start of data to be summed at any boundary
* @param len length of data to be summed
* @return host order (!) lwip checksum (non-inverted Internet sum)
*
* @note accumulator size limits summable length to 64k
* @note host endianess is irrelevant (p3 RFC1071)
*/
u16_t
lwip_standard_chksum(const void *dataptr, int len)
{
u32_t acc;
u16_t src;
const u8_t *octetptr;
acc = 0;
/* dataptr may be at odd or even addresses */
octetptr = (const u8_t *)dataptr;
while (len > 1) {
/* declare first octet as most significant
thus assume network order, ignoring host order */
src = (*octetptr) << 8;
octetptr++;
/* declare second octet as least significant */
src |= (*octetptr);
octetptr++;
acc += src;
len -= 2;
}
if (len > 0) {
/* accumulate remaining octet */
src = (*octetptr) << 8;
acc += src;
}
/* add deferred carry bits */
acc = (acc >> 16) + (acc & 0x0000ffffUL);
if ((acc & 0xffff0000UL) != 0) {
acc = (acc >> 16) + (acc & 0x0000ffffUL);
}
/* This maybe a little confusing: reorder sum using lwip_htons()
instead of lwip_ntohs() since it has a little less call overhead.
The caller must invert bits for Internet sum ! */
return lwip_htons((u16_t)acc);
}
#endif
#if (LWIP_CHKSUM_ALGORITHM == 2) /* Alternative version #2 */
/*
* Curt McDowell
* Broadcom Corp.
* csm@broadcom.com
*
* IP checksum two bytes at a time with support for
* unaligned buffer.
* Works for len up to and including 0x20000.
* by Curt McDowell, Broadcom Corp. 12/08/2005
*
* @param dataptr points to start of data to be summed at any boundary
* @param len length of data to be summed
* @return host order (!) lwip checksum (non-inverted Internet sum)
*/
u16_t
lwip_standard_chksum(const void *dataptr, int len)
{
const u8_t *pb = (const u8_t *)dataptr;
const u16_t *ps;
u16_t t = 0;
u32_t sum = 0;
int odd = ((mem_ptr_t)pb & 1);
/* Get aligned to u16_t */
if (odd && len > 0) {
((u8_t *)&t)[1] = *pb++;
len--;
}
/* Add the bulk of the data */
ps = (const u16_t *)(const void *)pb;
while (len > 1) {
sum += *ps++;
len -= 2;
}
/* Consume left-over byte, if any */
if (len > 0) {
((u8_t *)&t)[0] = *(const u8_t *)ps;
}
/* Add end bytes */
sum += t;
/* Fold 32-bit sum to 16 bits
calling this twice is probably faster than if statements... */
sum = FOLD_U32T(sum);
sum = FOLD_U32T(sum);
/* Swap if alignment was odd */
if (odd) {
sum = SWAP_BYTES_IN_WORD(sum);
}
return (u16_t)sum;
}
#endif
#if (LWIP_CHKSUM_ALGORITHM == 3) /* Alternative version #3 */
/**
* An optimized checksum routine. Basically, it uses loop-unrolling on
* the checksum loop, treating the head and tail bytes specially, whereas
* the inner loop acts on 8 bytes at a time.
*
* @arg start of buffer to be checksummed. May be an odd byte address.
* @len number of bytes in the buffer to be checksummed.
* @return host order (!) lwip checksum (non-inverted Internet sum)
*
* by Curt McDowell, Broadcom Corp. December 8th, 2005
*/
u16_t
lwip_standard_chksum(const void *dataptr, int len)
{
const u8_t *pb = (const u8_t *)dataptr;
const u16_t *ps;
u16_t t = 0;
const u32_t *pl;
u32_t sum = 0, tmp;
/* starts at odd byte address? */
int odd = ((mem_ptr_t)pb & 1);
if (odd && len > 0) {
((u8_t *)&t)[1] = *pb++;
len--;
}
ps = (const u16_t *)(const void *)pb;
if (((mem_ptr_t)ps & 3) && len > 1) {
sum += *ps++;
len -= 2;
}
pl = (const u32_t *)(const void *)ps;
while (len > 7) {
tmp = sum + *pl++; /* ping */
if (tmp < sum) {
tmp++; /* add back carry */
}
sum = tmp + *pl++; /* pong */
if (sum < tmp) {
sum++; /* add back carry */
}
len -= 8;
}
/* make room in upper bits */
sum = FOLD_U32T(sum);
ps = (const u16_t *)pl;
/* 16-bit aligned word remaining? */
while (len > 1) {
sum += *ps++;
len -= 2;
}
/* dangling tail byte remaining? */
if (len > 0) { /* include odd byte */
((u8_t *)&t)[0] = *(const u8_t *)ps;
}
sum += t; /* add end bytes */
/* Fold 32-bit sum to 16 bits
calling this twice is probably faster than if statements... */
sum = FOLD_U32T(sum);
sum = FOLD_U32T(sum);
if (odd) {
sum = SWAP_BYTES_IN_WORD(sum);
}
return (u16_t)sum;
}
#endif
/** Parts of the pseudo checksum which are common to IPv4 and IPv6 */
static u16_t
inet_cksum_pseudo_base(struct pbuf *p, u8_t proto, u16_t proto_len, u32_t acc)
{
struct pbuf *q;
int swapped = 0;
/* iterate through all pbuf in chain */
for (q = p; q != NULL; q = q->next) {
LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n",
(void *)q, (void *)q->next));
acc += LWIP_CHKSUM(q->payload, q->len);
/*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%"X32_F" \n", acc));*/
/* just executing this next line is probably faster that the if statement needed
to check whether we really need to execute it, and does no harm */
acc = FOLD_U32T(acc);
if (q->len % 2 != 0) {
swapped = !swapped;
acc = SWAP_BYTES_IN_WORD(acc);
}
/*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%"X32_F" \n", acc));*/
}
if (swapped) {
acc = SWAP_BYTES_IN_WORD(acc);
}
acc += (u32_t)lwip_htons((u16_t)proto);
acc += (u32_t)lwip_htons(proto_len);
/* Fold 32-bit sum to 16 bits
calling this twice is probably faster than if statements... */
acc = FOLD_U32T(acc);
acc = FOLD_U32T(acc);
LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%"X32_F"\n", acc));
return (u16_t)~(acc & 0xffffUL);
}
#if LWIP_IPV4
/* inet_chksum_pseudo:
*
* Calculates the IPv4 pseudo Internet checksum used by TCP and UDP for a pbuf chain.
* IP addresses are expected to be in network byte order.
*
* @param p chain of pbufs over that a checksum should be calculated (ip data part)
* @param src source ip address (used for checksum of pseudo header)
* @param dst destination ip address (used for checksum of pseudo header)
* @param proto ip protocol (used for checksum of pseudo header)
* @param proto_len length of the ip data part (used for checksum of pseudo header)
* @return checksum (as u16_t) to be saved directly in the protocol header
*/
u16_t
inet_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
const ip4_addr_t *src, const ip4_addr_t *dest)
{
u32_t acc;
u32_t addr;
addr = ip4_addr_get_u32(src);
acc = (addr & 0xffffUL);
acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL));
addr = ip4_addr_get_u32(dest);
acc = (u32_t)(acc + (addr & 0xffffUL));
acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL));
/* fold down to 16 bits */
acc = FOLD_U32T(acc);
acc = FOLD_U32T(acc);
return inet_cksum_pseudo_base(p, proto, proto_len, acc);
}
#endif /* LWIP_IPV4 */
#if LWIP_IPV6
/**
* Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain.
* IPv6 addresses are expected to be in network byte order.
*
* @param p chain of pbufs over that a checksum should be calculated (ip data part)
* @param proto ipv6 protocol/next header (used for checksum of pseudo header)
* @param proto_len length of the ipv6 payload (used for checksum of pseudo header)
* @param src source ipv6 address (used for checksum of pseudo header)
* @param dest destination ipv6 address (used for checksum of pseudo header)
* @return checksum (as u16_t) to be saved directly in the protocol header
*/
u16_t
ip6_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
const ip6_addr_t *src, const ip6_addr_t *dest)
{
u32_t acc = 0;
u32_t addr;
u8_t addr_part;
for (addr_part = 0; addr_part < 4; addr_part++) {
addr = src->addr[addr_part];
acc = (u32_t)(acc + (addr & 0xffffUL));
acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL));
addr = dest->addr[addr_part];
acc = (u32_t)(acc + (addr & 0xffffUL));
acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL));
}
/* fold down to 16 bits */
acc = FOLD_U32T(acc);
acc = FOLD_U32T(acc);
return inet_cksum_pseudo_base(p, proto, proto_len, acc);
}
#endif /* LWIP_IPV6 */
/* ip_chksum_pseudo:
*
* Calculates the IPv4 or IPv6 pseudo Internet checksum used by TCP and UDP for a pbuf chain.
* IP addresses are expected to be in network byte order.
*
* @param p chain of pbufs over that a checksum should be calculated (ip data part)
* @param src source ip address (used for checksum of pseudo header)
* @param dst destination ip address (used for checksum of pseudo header)
* @param proto ip protocol (used for checksum of pseudo header)
* @param proto_len length of the ip data part (used for checksum of pseudo header)
* @return checksum (as u16_t) to be saved directly in the protocol header
*/
u16_t
ip_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
const ip_addr_t *src, const ip_addr_t *dest)
{
#if LWIP_IPV6
if (IP_IS_V6(dest)) {
return ip6_chksum_pseudo(p, proto, proto_len, ip_2_ip6(src), ip_2_ip6(dest));
}
#endif /* LWIP_IPV6 */
#if LWIP_IPV4 && LWIP_IPV6
else
#endif /* LWIP_IPV4 && LWIP_IPV6 */
#if LWIP_IPV4
{
return inet_chksum_pseudo(p, proto, proto_len, ip_2_ip4(src), ip_2_ip4(dest));
}
#endif /* LWIP_IPV4 */
}
/** Parts of the pseudo checksum which are common to IPv4 and IPv6 */
static u16_t
inet_cksum_pseudo_partial_base(struct pbuf *p, u8_t proto, u16_t proto_len,
u16_t chksum_len, u32_t acc)
{
struct pbuf *q;
int swapped = 0;
u16_t chklen;
/* iterate through all pbuf in chain */
for (q = p; (q != NULL) && (chksum_len > 0); q = q->next) {
LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n",
(void *)q, (void *)q->next));
chklen = q->len;
if (chklen > chksum_len) {
chklen = chksum_len;
}
acc += LWIP_CHKSUM(q->payload, chklen);
chksum_len = (u16_t)(chksum_len - chklen);
LWIP_ASSERT("delete me", chksum_len < 0x7fff);
/*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%"X32_F" \n", acc));*/
/* fold the upper bit down */
acc = FOLD_U32T(acc);
if (q->len % 2 != 0) {
swapped = !swapped;
acc = SWAP_BYTES_IN_WORD(acc);
}
/*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%"X32_F" \n", acc));*/
}
if (swapped) {
acc = SWAP_BYTES_IN_WORD(acc);
}
acc += (u32_t)lwip_htons((u16_t)proto);
acc += (u32_t)lwip_htons(proto_len);
/* Fold 32-bit sum to 16 bits
calling this twice is probably faster than if statements... */
acc = FOLD_U32T(acc);
acc = FOLD_U32T(acc);
LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%"X32_F"\n", acc));
return (u16_t)~(acc & 0xffffUL);
}
#if LWIP_IPV4
/* inet_chksum_pseudo_partial:
*
* Calculates the IPv4 pseudo Internet checksum used by TCP and UDP for a pbuf chain.
* IP addresses are expected to be in network byte order.
*
* @param p chain of pbufs over that a checksum should be calculated (ip data part)
* @param src source ip address (used for checksum of pseudo header)
* @param dst destination ip address (used for checksum of pseudo header)
* @param proto ip protocol (used for checksum of pseudo header)
* @param proto_len length of the ip data part (used for checksum of pseudo header)
* @return checksum (as u16_t) to be saved directly in the protocol header
*/
u16_t
inet_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len,
u16_t chksum_len, const ip4_addr_t *src, const ip4_addr_t *dest)
{
u32_t acc;
u32_t addr;
addr = ip4_addr_get_u32(src);
acc = (addr & 0xffffUL);
acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL));
addr = ip4_addr_get_u32(dest);
acc = (u32_t)(acc + (addr & 0xffffUL));
acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL));
/* fold down to 16 bits */
acc = FOLD_U32T(acc);
acc = FOLD_U32T(acc);
return inet_cksum_pseudo_partial_base(p, proto, proto_len, chksum_len, acc);
}
#endif /* LWIP_IPV4 */
#if LWIP_IPV6
/**
* Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain.
* IPv6 addresses are expected to be in network byte order. Will only compute for a
* portion of the payload.
*
* @param p chain of pbufs over that a checksum should be calculated (ip data part)
* @param proto ipv6 protocol/next header (used for checksum of pseudo header)
* @param proto_len length of the ipv6 payload (used for checksum of pseudo header)
* @param chksum_len number of payload bytes used to compute chksum
* @param src source ipv6 address (used for checksum of pseudo header)
* @param dest destination ipv6 address (used for checksum of pseudo header)
* @return checksum (as u16_t) to be saved directly in the protocol header
*/
u16_t
ip6_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len,
u16_t chksum_len, const ip6_addr_t *src, const ip6_addr_t *dest)
{
u32_t acc = 0;
u32_t addr;
u8_t addr_part;
for (addr_part = 0; addr_part < 4; addr_part++) {
addr = src->addr[addr_part];
acc = (u32_t)(acc + (addr & 0xffffUL));
acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL));
addr = dest->addr[addr_part];
acc = (u32_t)(acc + (addr & 0xffffUL));
acc = (u32_t)(acc + ((addr >> 16) & 0xffffUL));
}
/* fold down to 16 bits */
acc = FOLD_U32T(acc);
acc = FOLD_U32T(acc);
return inet_cksum_pseudo_partial_base(p, proto, proto_len, chksum_len, acc);
}
#endif /* LWIP_IPV6 */
/* ip_chksum_pseudo_partial:
*
* Calculates the IPv4 or IPv6 pseudo Internet checksum used by TCP and UDP for a pbuf chain.
*
* @param p chain of pbufs over that a checksum should be calculated (ip data part)
* @param src source ip address (used for checksum of pseudo header)
* @param dst destination ip address (used for checksum of pseudo header)
* @param proto ip protocol (used for checksum of pseudo header)
* @param proto_len length of the ip data part (used for checksum of pseudo header)
* @return checksum (as u16_t) to be saved directly in the protocol header
*/
u16_t
ip_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len,
u16_t chksum_len, const ip_addr_t *src, const ip_addr_t *dest)
{
#if LWIP_IPV6
if (IP_IS_V6(dest)) {
return ip6_chksum_pseudo_partial(p, proto, proto_len, chksum_len, ip_2_ip6(src), ip_2_ip6(dest));
}
#endif /* LWIP_IPV6 */
#if LWIP_IPV4 && LWIP_IPV6
else
#endif /* LWIP_IPV4 && LWIP_IPV6 */
#if LWIP_IPV4
{
return inet_chksum_pseudo_partial(p, proto, proto_len, chksum_len, ip_2_ip4(src), ip_2_ip4(dest));
}
#endif /* LWIP_IPV4 */
}
/* inet_chksum:
*
* Calculates the Internet checksum over a portion of memory. Used primarily for IP
* and ICMP.
*
* @param dataptr start of the buffer to calculate the checksum (no alignment needed)
* @param len length of the buffer to calculate the checksum
* @return checksum (as u16_t) to be saved directly in the protocol header
*/
u16_t
inet_chksum(const void *dataptr, u16_t len)
{
return (u16_t)~(unsigned int)LWIP_CHKSUM(dataptr, len);
}
/**
* Calculate a checksum over a chain of pbufs (without pseudo-header, much like
* inet_chksum only pbufs are used).
*
* @param p pbuf chain over that the checksum should be calculated
* @return checksum (as u16_t) to be saved directly in the protocol header
*/
u16_t
inet_chksum_pbuf(struct pbuf *p)
{
u32_t acc;
struct pbuf *q;
int swapped = 0;
acc = 0;
for (q = p; q != NULL; q = q->next) {
acc += LWIP_CHKSUM(q->payload, q->len);
acc = FOLD_U32T(acc);
if (q->len % 2 != 0) {
swapped = !swapped;
acc = SWAP_BYTES_IN_WORD(acc);
}
}
if (swapped) {
acc = SWAP_BYTES_IN_WORD(acc);
}
return (u16_t)~(acc & 0xffffUL);
}
/* These are some implementations for LWIP_CHKSUM_COPY, which copies data
* like MEMCPY but generates a checksum at the same time. Since this is a
* performance-sensitive function, you might want to create your own version
* in assembly targeted at your hardware by defining it in lwipopts.h:
* #define LWIP_CHKSUM_COPY(dst, src, len) your_chksum_copy(dst, src, len)
*/
#if (LWIP_CHKSUM_COPY_ALGORITHM == 1) /* Version #1 */
/** Safe but slow: first call MEMCPY, then call LWIP_CHKSUM.
* For architectures with big caches, data might still be in cache when
* generating the checksum after copying.
*/
u16_t
lwip_chksum_copy(void *dst, const void *src, u16_t len)
{
MEMCPY(dst, src, len);
return LWIP_CHKSUM(dst, len);
}
#endif /* (LWIP_CHKSUM_COPY_ALGORITHM == 1) */

380
core/init.c Executable file
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@ -0,0 +1,380 @@
/**
* @file
* Modules initialization
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*/
#include "lwip/opt.h"
#include "lwip/init.h"
#include "lwip/stats.h"
#include "lwip/sys.h"
#include "lwip/mem.h"
#include "lwip/memp.h"
#include "lwip/pbuf.h"
#include "lwip/netif.h"
#include "lwip/sockets.h"
#include "lwip/ip.h"
#include "lwip/raw.h"
#include "lwip/udp.h"
#include "lwip/priv/tcp_priv.h"
#include "lwip/igmp.h"
#include "lwip/dns.h"
#include "lwip/timeouts.h"
#include "lwip/etharp.h"
#include "lwip/ip6.h"
#include "lwip/nd6.h"
#include "lwip/mld6.h"
#include "lwip/api.h"
#include "netif/ppp/ppp_opts.h"
#include "netif/ppp/ppp_impl.h"
#ifndef LWIP_SKIP_PACKING_CHECK
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct packed_struct_test {
PACK_STRUCT_FLD_8(u8_t dummy1);
PACK_STRUCT_FIELD(u32_t dummy2);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
#define PACKED_STRUCT_TEST_EXPECTED_SIZE 5
#endif
/* Compile-time sanity checks for configuration errors.
* These can be done independently of LWIP_DEBUG, without penalty.
*/
#ifndef BYTE_ORDER
#error "BYTE_ORDER is not defined, you have to define it in your cc.h"
#endif
#if (!IP_SOF_BROADCAST && IP_SOF_BROADCAST_RECV)
#error "If you want to use broadcast filter per pcb on recv operations, you have to define IP_SOF_BROADCAST=1 in your lwipopts.h"
#endif
#if (!LWIP_UDP && LWIP_UDPLITE)
#error "If you want to use UDP Lite, you have to define LWIP_UDP=1 in your lwipopts.h"
#endif
#if (!LWIP_UDP && LWIP_DHCP)
#error "If you want to use DHCP, you have to define LWIP_UDP=1 in your lwipopts.h"
#endif
#if (!LWIP_UDP && !LWIP_RAW && LWIP_MULTICAST_TX_OPTIONS)
#error "If you want to use LWIP_MULTICAST_TX_OPTIONS, you have to define LWIP_UDP=1 and/or LWIP_RAW=1 in your lwipopts.h"
#endif
#if (!LWIP_UDP && LWIP_DNS)
#error "If you want to use DNS, you have to define LWIP_UDP=1 in your lwipopts.h"
#endif
#if !MEMP_MEM_MALLOC /* MEMP_NUM_* checks are disabled when not using the pool allocator */
#if (LWIP_ARP && ARP_QUEUEING && (MEMP_NUM_ARP_QUEUE<=0))
#error "If you want to use ARP Queueing, you have to define MEMP_NUM_ARP_QUEUE>=1 in your lwipopts.h"
#endif
#if (LWIP_RAW && (MEMP_NUM_RAW_PCB<=0))
#error "If you want to use RAW, you have to define MEMP_NUM_RAW_PCB>=1 in your lwipopts.h"
#endif
#if (LWIP_UDP && (MEMP_NUM_UDP_PCB<=0))
#error "If you want to use UDP, you have to define MEMP_NUM_UDP_PCB>=1 in your lwipopts.h"
#endif
#if (LWIP_TCP && (MEMP_NUM_TCP_PCB<=0))
#error "If you want to use TCP, you have to define MEMP_NUM_TCP_PCB>=1 in your lwipopts.h"
#endif
#if (LWIP_IGMP && (MEMP_NUM_IGMP_GROUP<=1))
#error "If you want to use IGMP, you have to define MEMP_NUM_IGMP_GROUP>1 in your lwipopts.h"
#endif
#if (LWIP_IGMP && !LWIP_MULTICAST_TX_OPTIONS)
#error "If you want to use IGMP, you have to define LWIP_MULTICAST_TX_OPTIONS==1 in your lwipopts.h"
#endif
#if (LWIP_IGMP && !LWIP_IPV4)
#error "IGMP needs LWIP_IPV4 enabled in your lwipopts.h"
#endif
#if ((LWIP_NETCONN || LWIP_SOCKET) && (MEMP_NUM_TCPIP_MSG_API<=0))
#error "If you want to use Sequential API, you have to define MEMP_NUM_TCPIP_MSG_API>=1 in your lwipopts.h"
#endif
/* There must be sufficient timeouts, taking into account requirements of the subsystems. */
#if LWIP_TIMERS && (MEMP_NUM_SYS_TIMEOUT < LWIP_NUM_SYS_TIMEOUT_INTERNAL)
#error "MEMP_NUM_SYS_TIMEOUT is too low to accomodate all required timeouts"
#endif
#if (IP_REASSEMBLY && (MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS))
#error "MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS doesn't make sense since each struct ip_reassdata must hold 2 pbufs at least!"
#endif
#endif /* !MEMP_MEM_MALLOC */
#if LWIP_WND_SCALE
#if (LWIP_TCP && (TCP_WND > 0xffffffff))
#error "If you want to use TCP, TCP_WND must fit in an u32_t, so, you have to reduce it in your lwipopts.h"
#endif
#if (LWIP_TCP && (TCP_RCV_SCALE > 14))
#error "The maximum valid window scale value is 14!"
#endif
#if (LWIP_TCP && (TCP_WND > (0xFFFFU << TCP_RCV_SCALE)))
#error "TCP_WND is bigger than the configured LWIP_WND_SCALE allows!"
#endif
#if (LWIP_TCP && ((TCP_WND >> TCP_RCV_SCALE) == 0))
#error "TCP_WND is too small for the configured LWIP_WND_SCALE (results in zero window)!"
#endif
#else /* LWIP_WND_SCALE */
#if (LWIP_TCP && (TCP_WND > 0xffff))
#error "If you want to use TCP, TCP_WND must fit in an u16_t, so, you have to reduce it in your lwipopts.h (or enable window scaling)"
#endif
#endif /* LWIP_WND_SCALE */
#if (LWIP_TCP && (TCP_SND_QUEUELEN > 0xffff))
#error "If you want to use TCP, TCP_SND_QUEUELEN must fit in an u16_t, so, you have to reduce it in your lwipopts.h"
#endif
#if (LWIP_TCP && (TCP_SND_QUEUELEN < 2))
#error "TCP_SND_QUEUELEN must be at least 2 for no-copy TCP writes to work"
#endif
#if (LWIP_TCP && ((TCP_MAXRTX > 12) || (TCP_SYNMAXRTX > 12)))
#error "If you want to use TCP, TCP_MAXRTX and TCP_SYNMAXRTX must less or equal to 12 (due to tcp_backoff table), so, you have to reduce them in your lwipopts.h"
#endif
#if (LWIP_TCP && TCP_LISTEN_BACKLOG && ((TCP_DEFAULT_LISTEN_BACKLOG < 0) || (TCP_DEFAULT_LISTEN_BACKLOG > 0xff)))
#error "If you want to use TCP backlog, TCP_DEFAULT_LISTEN_BACKLOG must fit into an u8_t"
#endif
#if (LWIP_TCP && LWIP_TCP_SACK_OUT && !TCP_QUEUE_OOSEQ)
#error "To use LWIP_TCP_SACK_OUT, TCP_QUEUE_OOSEQ needs to be enabled"
#endif
#if (LWIP_TCP && LWIP_TCP_SACK_OUT && (LWIP_TCP_MAX_SACK_NUM < 1))
#error "LWIP_TCP_MAX_SACK_NUM must be greater than 0"
#endif
#if (LWIP_NETIF_API && (NO_SYS==1))
#error "If you want to use NETIF API, you have to define NO_SYS=0 in your lwipopts.h"
#endif
#if ((LWIP_SOCKET || LWIP_NETCONN) && (NO_SYS==1))
#error "If you want to use Sequential API, you have to define NO_SYS=0 in your lwipopts.h"
#endif
#if (LWIP_PPP_API && (NO_SYS==1))
#error "If you want to use PPP API, you have to define NO_SYS=0 in your lwipopts.h"
#endif
#if (LWIP_PPP_API && (PPP_SUPPORT==0))
#error "If you want to use PPP API, you have to enable PPP_SUPPORT in your lwipopts.h"
#endif
#if (((!LWIP_DHCP) || (!LWIP_AUTOIP)) && LWIP_DHCP_AUTOIP_COOP)
#error "If you want to use DHCP/AUTOIP cooperation mode, you have to define LWIP_DHCP=1 and LWIP_AUTOIP=1 in your lwipopts.h"
#endif
#if (((!LWIP_DHCP) || (!LWIP_ARP)) && DHCP_DOES_ARP_CHECK)
#error "If you want to use DHCP ARP checking, you have to define LWIP_DHCP=1 and LWIP_ARP=1 in your lwipopts.h"
#endif
#if (!LWIP_ARP && LWIP_AUTOIP)
#error "If you want to use AUTOIP, you have to define LWIP_ARP=1 in your lwipopts.h"
#endif
#if (LWIP_TCP && ((LWIP_EVENT_API && LWIP_CALLBACK_API) || (!LWIP_EVENT_API && !LWIP_CALLBACK_API)))
#error "One and exactly one of LWIP_EVENT_API and LWIP_CALLBACK_API has to be enabled in your lwipopts.h"
#endif
#if (LWIP_ALTCP && LWIP_EVENT_API)
#error "The application layered tcp API does not work with LWIP_EVENT_API"
#endif
#if (MEM_LIBC_MALLOC && MEM_USE_POOLS)
#error "MEM_LIBC_MALLOC and MEM_USE_POOLS may not both be simultaneously enabled in your lwipopts.h"
#endif
#if (MEM_USE_POOLS && !MEMP_USE_CUSTOM_POOLS)
#error "MEM_USE_POOLS requires custom pools (MEMP_USE_CUSTOM_POOLS) to be enabled in your lwipopts.h"
#endif
#if (PBUF_POOL_BUFSIZE <= MEM_ALIGNMENT)
#error "PBUF_POOL_BUFSIZE must be greater than MEM_ALIGNMENT or the offset may take the full first pbuf"
#endif
#if (DNS_LOCAL_HOSTLIST && !DNS_LOCAL_HOSTLIST_IS_DYNAMIC && !(defined(DNS_LOCAL_HOSTLIST_INIT)))
#error "you have to define define DNS_LOCAL_HOSTLIST_INIT {{'host1', 0x123}, {'host2', 0x234}} to initialize DNS_LOCAL_HOSTLIST"
#endif
#if PPP_SUPPORT && !PPPOS_SUPPORT && !PPPOE_SUPPORT && !PPPOL2TP_SUPPORT
#error "PPP_SUPPORT needs at least one of PPPOS_SUPPORT, PPPOE_SUPPORT or PPPOL2TP_SUPPORT turned on"
#endif
#if PPP_SUPPORT && !PPP_IPV4_SUPPORT && !PPP_IPV6_SUPPORT
#error "PPP_SUPPORT needs PPP_IPV4_SUPPORT and/or PPP_IPV6_SUPPORT turned on"
#endif
#if PPP_SUPPORT && PPP_IPV4_SUPPORT && !LWIP_IPV4
#error "PPP_IPV4_SUPPORT needs LWIP_IPV4 turned on"
#endif
#if PPP_SUPPORT && PPP_IPV6_SUPPORT && !LWIP_IPV6
#error "PPP_IPV6_SUPPORT needs LWIP_IPV6 turned on"
#endif
#if !LWIP_ETHERNET && (LWIP_ARP || PPPOE_SUPPORT)
#error "LWIP_ETHERNET needs to be turned on for LWIP_ARP or PPPOE_SUPPORT"
#endif
#if LWIP_TCPIP_CORE_LOCKING_INPUT && !LWIP_TCPIP_CORE_LOCKING
#error "When using LWIP_TCPIP_CORE_LOCKING_INPUT, LWIP_TCPIP_CORE_LOCKING must be enabled, too"
#endif
#if LWIP_TCP && LWIP_NETIF_TX_SINGLE_PBUF && !TCP_OVERSIZE
#error "LWIP_NETIF_TX_SINGLE_PBUF needs TCP_OVERSIZE enabled to create single-pbuf TCP packets"
#endif
#if LWIP_NETCONN && LWIP_TCP
#if NETCONN_COPY != TCP_WRITE_FLAG_COPY
#error "NETCONN_COPY != TCP_WRITE_FLAG_COPY"
#endif
#if NETCONN_MORE != TCP_WRITE_FLAG_MORE
#error "NETCONN_MORE != TCP_WRITE_FLAG_MORE"
#endif
#endif /* LWIP_NETCONN && LWIP_TCP */
#if LWIP_SOCKET
#endif /* LWIP_SOCKET */
/* Compile-time checks for deprecated options.
*/
#ifdef MEMP_NUM_TCPIP_MSG
#error "MEMP_NUM_TCPIP_MSG option is deprecated. Remove it from your lwipopts.h."
#endif
#ifdef TCP_REXMIT_DEBUG
#error "TCP_REXMIT_DEBUG option is deprecated. Remove it from your lwipopts.h."
#endif
#ifdef RAW_STATS
#error "RAW_STATS option is deprecated. Remove it from your lwipopts.h."
#endif
#ifdef ETHARP_QUEUE_FIRST
#error "ETHARP_QUEUE_FIRST option is deprecated. Remove it from your lwipopts.h."
#endif
#ifdef ETHARP_ALWAYS_INSERT
#error "ETHARP_ALWAYS_INSERT option is deprecated. Remove it from your lwipopts.h."
#endif
#if !NO_SYS && LWIP_TCPIP_CORE_LOCKING && LWIP_COMPAT_MUTEX && !defined(LWIP_COMPAT_MUTEX_ALLOWED)
#error "LWIP_COMPAT_MUTEX cannot prevent priority inversion. It is recommended to implement priority-aware mutexes. (Define LWIP_COMPAT_MUTEX_ALLOWED to disable this error.)"
#endif
#ifndef LWIP_DISABLE_TCP_SANITY_CHECKS
#define LWIP_DISABLE_TCP_SANITY_CHECKS 0
#endif
#ifndef LWIP_DISABLE_MEMP_SANITY_CHECKS
#define LWIP_DISABLE_MEMP_SANITY_CHECKS 0
#endif
/* MEMP sanity checks */
#if MEMP_MEM_MALLOC
#if !LWIP_DISABLE_MEMP_SANITY_CHECKS
#if LWIP_NETCONN || LWIP_SOCKET
#if !MEMP_NUM_NETCONN && LWIP_SOCKET
#error "lwip_sanity_check: WARNING: MEMP_NUM_NETCONN cannot be 0 when using sockets!"
#endif
#else /* MEMP_MEM_MALLOC */
#if MEMP_NUM_NETCONN > (MEMP_NUM_TCP_PCB+MEMP_NUM_TCP_PCB_LISTEN+MEMP_NUM_UDP_PCB+MEMP_NUM_RAW_PCB)
#error "lwip_sanity_check: WARNING: MEMP_NUM_NETCONN should be less than the sum of MEMP_NUM_{TCP,RAW,UDP}_PCB+MEMP_NUM_TCP_PCB_LISTEN. If you know what you are doing, define LWIP_DISABLE_MEMP_SANITY_CHECKS to 1 to disable this error."
#endif
#endif /* LWIP_NETCONN || LWIP_SOCKET */
#endif /* !LWIP_DISABLE_MEMP_SANITY_CHECKS */
#if MEM_USE_POOLS
#error "MEMP_MEM_MALLOC and MEM_USE_POOLS cannot be enabled at the same time"
#endif
#ifdef LWIP_HOOK_MEMP_AVAILABLE
#error "LWIP_HOOK_MEMP_AVAILABLE doesn't make sense with MEMP_MEM_MALLOC"
#endif
#endif /* MEMP_MEM_MALLOC */
/* TCP sanity checks */
#if !LWIP_DISABLE_TCP_SANITY_CHECKS
#if LWIP_TCP
#if !MEMP_MEM_MALLOC && (MEMP_NUM_TCP_SEG < TCP_SND_QUEUELEN)
#error "lwip_sanity_check: WARNING: MEMP_NUM_TCP_SEG should be at least as big as TCP_SND_QUEUELEN. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
#endif
#if TCP_SND_BUF < (2 * TCP_MSS)
#error "lwip_sanity_check: WARNING: TCP_SND_BUF must be at least as much as (2 * TCP_MSS) for things to work smoothly. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
#endif
#if TCP_SND_QUEUELEN < (2 * (TCP_SND_BUF / TCP_MSS))
#error "lwip_sanity_check: WARNING: TCP_SND_QUEUELEN must be at least as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
#endif
#if TCP_SNDLOWAT >= TCP_SND_BUF
#error "lwip_sanity_check: WARNING: TCP_SNDLOWAT must be less than TCP_SND_BUF. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
#endif
#if TCP_SNDLOWAT >= (0xFFFF - (4 * TCP_MSS))
#error "lwip_sanity_check: WARNING: TCP_SNDLOWAT must at least be 4*MSS below u16_t overflow!"
#endif
#if TCP_SNDQUEUELOWAT >= TCP_SND_QUEUELEN
#error "lwip_sanity_check: WARNING: TCP_SNDQUEUELOWAT must be less than TCP_SND_QUEUELEN. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
#endif
#if !MEMP_MEM_MALLOC && PBUF_POOL_SIZE && (PBUF_POOL_BUFSIZE <= (PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN))
#error "lwip_sanity_check: WARNING: PBUF_POOL_BUFSIZE does not provide enough space for protocol headers. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
#endif
#if !MEMP_MEM_MALLOC && PBUF_POOL_SIZE && (TCP_WND > (PBUF_POOL_SIZE * (PBUF_POOL_BUFSIZE - (PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN))))
#error "lwip_sanity_check: WARNING: TCP_WND is larger than space provided by PBUF_POOL_SIZE * (PBUF_POOL_BUFSIZE - protocol headers). If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
#endif
#if TCP_WND < TCP_MSS
#error "lwip_sanity_check: WARNING: TCP_WND is smaller than MSS. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
#endif
#endif /* LWIP_TCP */
#endif /* !LWIP_DISABLE_TCP_SANITY_CHECKS */
/**
* @ingroup lwip_nosys
* Initialize all modules.
* Use this in NO_SYS mode. Use tcpip_init() otherwise.
*/
void
lwip_init(void)
{
#ifndef LWIP_SKIP_CONST_CHECK
int a = 0;
LWIP_UNUSED_ARG(a);
LWIP_ASSERT("LWIP_CONST_CAST not implemented correctly. Check your lwIP port.", LWIP_CONST_CAST(void *, &a) == &a);
#endif
#ifndef LWIP_SKIP_PACKING_CHECK
LWIP_ASSERT("Struct packing not implemented correctly. Check your lwIP port.", sizeof(struct packed_struct_test) == PACKED_STRUCT_TEST_EXPECTED_SIZE);
#endif
/* Modules initialization */
stats_init();
#if !NO_SYS
sys_init();
#endif /* !NO_SYS */
mem_init();
memp_init();
pbuf_init();
netif_init();
#if LWIP_IPV4
ip_init();
#if LWIP_ARP
etharp_init();
#endif /* LWIP_ARP */
#endif /* LWIP_IPV4 */
#if LWIP_RAW
raw_init();
#endif /* LWIP_RAW */
#if LWIP_UDP
udp_init();
#endif /* LWIP_UDP */
#if LWIP_TCP
tcp_init();
#endif /* LWIP_TCP */
#if LWIP_IGMP
igmp_init();
#endif /* LWIP_IGMP */
#if LWIP_DNS
dns_init();
#endif /* LWIP_DNS */
#if PPP_SUPPORT
ppp_init();
#endif
#if LWIP_TIMERS
sys_timeouts_init();
#endif /* LWIP_TIMERS */
}

167
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/**
* @file
* Common IPv4 and IPv6 code
*
* @defgroup ip IP
* @ingroup callbackstyle_api
*
* @defgroup ip4 IPv4
* @ingroup ip
*
* @defgroup ip6 IPv6
* @ingroup ip
*
* @defgroup ipaddr IP address handling
* @ingroup infrastructure
*
* @defgroup ip4addr IPv4 only
* @ingroup ipaddr
*
* @defgroup ip6addr IPv6 only
* @ingroup ipaddr
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#if LWIP_IPV4 || LWIP_IPV6
#include "lwip/ip_addr.h"
#include "lwip/ip.h"
/** Global data for both IPv4 and IPv6 */
struct ip_globals ip_data;
#if LWIP_IPV4 && LWIP_IPV6
const ip_addr_t ip_addr_any_type = IPADDR_ANY_TYPE_INIT;
/**
* @ingroup ipaddr
* Convert numeric IP address (both versions) into ASCII representation.
* returns ptr to static buffer; not reentrant!
*
* @param addr ip address in network order to convert
* @return pointer to a global static (!) buffer that holds the ASCII
* representation of addr
*/
char *ipaddr_ntoa(const ip_addr_t *addr)
{
if (addr == NULL) {
return NULL;
}
if (IP_IS_V6(addr)) {
return ip6addr_ntoa(ip_2_ip6(addr));
} else {
return ip4addr_ntoa(ip_2_ip4(addr));
}
}
/**
* @ingroup ipaddr
* Same as ipaddr_ntoa, but reentrant since a user-supplied buffer is used.
*
* @param addr ip address in network order to convert
* @param buf target buffer where the string is stored
* @param buflen length of buf
* @return either pointer to buf which now holds the ASCII
* representation of addr or NULL if buf was too small
*/
char *ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen)
{
if (addr == NULL) {
return NULL;
}
if (IP_IS_V6(addr)) {
return ip6addr_ntoa_r(ip_2_ip6(addr), buf, buflen);
} else {
return ip4addr_ntoa_r(ip_2_ip4(addr), buf, buflen);
}
}
/**
* @ingroup ipaddr
* Convert IP address string (both versions) to numeric.
* The version is auto-detected from the string.
*
* @param cp IP address string to convert
* @param addr conversion result is stored here
* @return 1 on success, 0 on error
*/
int
ipaddr_aton(const char *cp, ip_addr_t *addr)
{
if (cp != NULL) {
const char *c;
for (c = cp; *c != 0; c++) {
if (*c == ':') {
/* contains a colon: IPv6 address */
if (addr) {
IP_SET_TYPE_VAL(*addr, IPADDR_TYPE_V6);
}
return ip6addr_aton(cp, ip_2_ip6(addr));
} else if (*c == '.') {
/* contains a dot: IPv4 address */
break;
}
}
/* call ip4addr_aton as fallback or if IPv4 was found */
if (addr) {
IP_SET_TYPE_VAL(*addr, IPADDR_TYPE_V4);
}
return ip4addr_aton(cp, ip_2_ip4(addr));
}
return 0;
}
/**
* @ingroup lwip_nosys
* If both IP versions are enabled, this function can dispatch packets to the correct one.
* Don't call directly, pass to netif_add() and call netif->input().
*/
err_t
ip_input(struct pbuf *p, struct netif *inp)
{
if (p != NULL) {
if (IP_HDR_GET_VERSION(p->payload) == 6) {
return ip6_input(p, inp);
}
return ip4_input(p, inp);
}
return ERR_VAL;
}
#endif /* LWIP_IPV4 && LWIP_IPV6 */
#endif /* LWIP_IPV4 || LWIP_IPV6 */

527
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/**
* @file
* AutoIP Automatic LinkLocal IP Configuration
*
* This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
* with RFC 3927.
*
* @defgroup autoip AUTOIP
* @ingroup ip4
* AUTOIP related functions
* USAGE:
*
* define @ref LWIP_AUTOIP 1 in your lwipopts.h
* Options:
* AUTOIP_TMR_INTERVAL msecs,
* I recommend a value of 100. The value must divide 1000 with a remainder almost 0.
* Possible values are 1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 ....
*
* Without DHCP:
* - Call autoip_start() after netif_add().
*
* With DHCP:
* - define @ref LWIP_DHCP_AUTOIP_COOP 1 in your lwipopts.h.
* - Configure your DHCP Client.
*
* @see netifapi_autoip
*/
/*
*
* Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Dominik Spies <kontakt@dspies.de>
*/
#include "lwip/opt.h"
#if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
#include "lwip/mem.h"
/* #include "lwip/udp.h" */
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/autoip.h"
#include "lwip/etharp.h"
#include "lwip/prot/autoip.h"
#include <string.h>
/** Pseudo random macro based on netif informations.
* You could use "rand()" from the C Library if you define LWIP_AUTOIP_RAND in lwipopts.h */
#ifndef LWIP_AUTOIP_RAND
#define LWIP_AUTOIP_RAND(netif) ( (((u32_t)((netif->hwaddr[5]) & 0xff) << 24) | \
((u32_t)((netif->hwaddr[3]) & 0xff) << 16) | \
((u32_t)((netif->hwaddr[2]) & 0xff) << 8) | \
((u32_t)((netif->hwaddr[4]) & 0xff))) + \
(netif_autoip_data(netif)? netif_autoip_data(netif)->tried_llipaddr : 0))
#endif /* LWIP_AUTOIP_RAND */
/**
* Macro that generates the initial IP address to be tried by AUTOIP.
* If you want to override this, define it to something else in lwipopts.h.
*/
#ifndef LWIP_AUTOIP_CREATE_SEED_ADDR
#define LWIP_AUTOIP_CREATE_SEED_ADDR(netif) \
lwip_htonl(AUTOIP_RANGE_START + ((u32_t)(((u8_t)(netif->hwaddr[4])) | \
((u32_t)((u8_t)(netif->hwaddr[5]))) << 8)))
#endif /* LWIP_AUTOIP_CREATE_SEED_ADDR */
/* static functions */
static err_t autoip_arp_announce(struct netif *netif);
static void autoip_start_probing(struct netif *netif);
/**
* @ingroup autoip
* Set a statically allocated struct autoip to work with.
* Using this prevents autoip_start to allocate it using mem_malloc.
*
* @param netif the netif for which to set the struct autoip
* @param autoip (uninitialised) autoip struct allocated by the application
*/
void
autoip_set_struct(struct netif *netif, struct autoip *autoip)
{
LWIP_ASSERT_CORE_LOCKED();
LWIP_ASSERT("netif != NULL", netif != NULL);
LWIP_ASSERT("autoip != NULL", autoip != NULL);
LWIP_ASSERT("netif already has a struct autoip set",
netif_autoip_data(netif) == NULL);
/* clear data structure */
memset(autoip, 0, sizeof(struct autoip));
/* autoip->state = AUTOIP_STATE_OFF; */
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP, autoip);
}
/** Restart AutoIP client and check the next address (conflict detected)
*
* @param netif The netif under AutoIP control
*/
static void
autoip_restart(struct netif *netif)
{
struct autoip *autoip = netif_autoip_data(netif);
autoip->tried_llipaddr++;
autoip_start(netif);
}
/**
* Handle a IP address conflict after an ARP conflict detection
*/
static void
autoip_handle_arp_conflict(struct netif *netif)
{
struct autoip *autoip = netif_autoip_data(netif);
/* RFC3927, 2.5 "Conflict Detection and Defense" allows two options where
a) means retreat on the first conflict and
b) allows to keep an already configured address when having only one
conflict in 10 seconds
We use option b) since it helps to improve the chance that one of the two
conflicting hosts may be able to retain its address. */
if (autoip->lastconflict > 0) {
/* retreat, there was a conflicting ARP in the last DEFEND_INTERVAL seconds */
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_handle_arp_conflict(): we are defending, but in DEFEND_INTERVAL, retreating\n"));
/* Active TCP sessions are aborted when removing the ip addresss */
autoip_restart(netif);
} else {
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_handle_arp_conflict(): we are defend, send ARP Announce\n"));
autoip_arp_announce(netif);
autoip->lastconflict = DEFEND_INTERVAL * AUTOIP_TICKS_PER_SECOND;
}
}
/**
* Create an IP-Address out of range 169.254.1.0 to 169.254.254.255
*
* @param netif network interface on which create the IP-Address
* @param ipaddr ip address to initialize
*/
static void
autoip_create_addr(struct netif *netif, ip4_addr_t *ipaddr)
{
struct autoip *autoip = netif_autoip_data(netif);
/* Here we create an IP-Address out of range 169.254.1.0 to 169.254.254.255
* compliant to RFC 3927 Section 2.1
* We have 254 * 256 possibilities */
u32_t addr = lwip_ntohl(LWIP_AUTOIP_CREATE_SEED_ADDR(netif));
addr += autoip->tried_llipaddr;
addr = AUTOIP_NET | (addr & 0xffff);
/* Now, 169.254.0.0 <= addr <= 169.254.255.255 */
if (addr < AUTOIP_RANGE_START) {
addr += AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
}
if (addr > AUTOIP_RANGE_END) {
addr -= AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
}
LWIP_ASSERT("AUTOIP address not in range", (addr >= AUTOIP_RANGE_START) &&
(addr <= AUTOIP_RANGE_END));
ip4_addr_set_u32(ipaddr, lwip_htonl(addr));
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_create_addr(): tried_llipaddr=%"U16_F", %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
(u16_t)(autoip->tried_llipaddr), ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr),
ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
}
/**
* Sends an ARP probe from a network interface
*
* @param netif network interface used to send the probe
*/
static err_t
autoip_arp_probe(struct netif *netif)
{
struct autoip *autoip = netif_autoip_data(netif);
/* this works because netif->ip_addr is ANY */
return etharp_request(netif, &autoip->llipaddr);
}
/**
* Sends an ARP announce from a network interface
*
* @param netif network interface used to send the announce
*/
static err_t
autoip_arp_announce(struct netif *netif)
{
return etharp_gratuitous(netif);
}
/**
* Configure interface for use with current LL IP-Address
*
* @param netif network interface to configure with current LL IP-Address
*/
static err_t
autoip_bind(struct netif *netif)
{
struct autoip *autoip = netif_autoip_data(netif);
ip4_addr_t sn_mask, gw_addr;
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
("autoip_bind(netif=%p) %c%c%"U16_F" %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
(void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num,
ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr),
ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr)));
IP4_ADDR(&sn_mask, 255, 255, 0, 0);
IP4_ADDR(&gw_addr, 0, 0, 0, 0);
netif_set_addr(netif, &autoip->llipaddr, &sn_mask, &gw_addr);
/* interface is used by routing now that an address is set */
return ERR_OK;
}
/**
* @ingroup autoip
* Start AutoIP client
*
* @param netif network interface on which start the AutoIP client
*/
err_t
autoip_start(struct netif *netif)
{
struct autoip *autoip = netif_autoip_data(netif);
err_t result = ERR_OK;
LWIP_ASSERT_CORE_LOCKED();
LWIP_ERROR("netif is not up, old style port?", netif_is_up(netif), return ERR_ARG;);
/* Set IP-Address, Netmask and Gateway to 0 to make sure that
* ARP Packets are formed correctly
*/
netif_set_addr(netif, IP4_ADDR_ANY4, IP4_ADDR_ANY4, IP4_ADDR_ANY4);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_start(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0],
netif->name[1], (u16_t)netif->num));
if (autoip == NULL) {
/* no AutoIP client attached yet? */
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
("autoip_start(): starting new AUTOIP client\n"));
autoip = (struct autoip *)mem_calloc(1, sizeof(struct autoip));
if (autoip == NULL) {
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
("autoip_start(): could not allocate autoip\n"));
return ERR_MEM;
}
/* store this AutoIP client in the netif */
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP, autoip);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_start(): allocated autoip"));
} else {
autoip->state = AUTOIP_STATE_OFF;
autoip->ttw = 0;
autoip->sent_num = 0;
ip4_addr_set_zero(&autoip->llipaddr);
autoip->lastconflict = 0;
}
autoip_create_addr(netif, &(autoip->llipaddr));
autoip_start_probing(netif);
return result;
}
static void
autoip_start_probing(struct netif *netif)
{
struct autoip *autoip = netif_autoip_data(netif);
autoip->state = AUTOIP_STATE_PROBING;
autoip->sent_num = 0;
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_start_probing(): changing state to PROBING: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr),
ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr)));
/* time to wait to first probe, this is randomly
* chosen out of 0 to PROBE_WAIT seconds.
* compliant to RFC 3927 Section 2.2.1
*/
autoip->ttw = (u16_t)(LWIP_AUTOIP_RAND(netif) % (PROBE_WAIT * AUTOIP_TICKS_PER_SECOND));
/*
* if we tried more then MAX_CONFLICTS we must limit our rate for
* acquiring and probing address
* compliant to RFC 3927 Section 2.2.1
*/
if (autoip->tried_llipaddr > MAX_CONFLICTS) {
autoip->ttw = RATE_LIMIT_INTERVAL * AUTOIP_TICKS_PER_SECOND;
}
}
/**
* Handle a possible change in the network configuration.
*
* If there is an AutoIP address configured, take the interface down
* and begin probing with the same address.
*/
void
autoip_network_changed(struct netif *netif)
{
struct autoip *autoip = netif_autoip_data(netif);
if (autoip && (autoip->state != AUTOIP_STATE_OFF)) {
autoip_start_probing(netif);
}
}
/**
* @ingroup autoip
* Stop AutoIP client
*
* @param netif network interface on which stop the AutoIP client
*/
err_t
autoip_stop(struct netif *netif)
{
struct autoip *autoip = netif_autoip_data(netif);
LWIP_ASSERT_CORE_LOCKED();
if (autoip != NULL) {
autoip->state = AUTOIP_STATE_OFF;
if (ip4_addr_islinklocal(netif_ip4_addr(netif))) {
netif_set_addr(netif, IP4_ADDR_ANY4, IP4_ADDR_ANY4, IP4_ADDR_ANY4);
}
}
return ERR_OK;
}
/**
* Has to be called in loop every AUTOIP_TMR_INTERVAL milliseconds
*/
void
autoip_tmr(void)
{
struct netif *netif;
/* loop through netif's */
NETIF_FOREACH(netif) {
struct autoip *autoip = netif_autoip_data(netif);
/* only act on AutoIP configured interfaces */
if (autoip != NULL) {
if (autoip->lastconflict > 0) {
autoip->lastconflict--;
}
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
("autoip_tmr() AutoIP-State: %"U16_F", ttw=%"U16_F"\n",
(u16_t)(autoip->state), autoip->ttw));
if (autoip->ttw > 0) {
autoip->ttw--;
}
switch (autoip->state) {
case AUTOIP_STATE_PROBING:
if (autoip->ttw == 0) {
if (autoip->sent_num >= PROBE_NUM) {
/* Switch to ANNOUNCING: now we can bind to an IP address and use it */
autoip->state = AUTOIP_STATE_ANNOUNCING;
autoip_bind(netif);
/* autoip_bind() calls netif_set_addr(): this triggers a gratuitous ARP
which counts as an announcement */
autoip->sent_num = 1;
autoip->ttw = ANNOUNCE_WAIT * AUTOIP_TICKS_PER_SECOND;
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_tmr(): changing state to ANNOUNCING: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr),
ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr)));
} else {
autoip_arp_probe(netif);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_tmr() PROBING Sent Probe\n"));
autoip->sent_num++;
if (autoip->sent_num == PROBE_NUM) {
/* calculate time to wait to for announce */
autoip->ttw = ANNOUNCE_WAIT * AUTOIP_TICKS_PER_SECOND;
} else {
/* calculate time to wait to next probe */
autoip->ttw = (u16_t)((LWIP_AUTOIP_RAND(netif) %
((PROBE_MAX - PROBE_MIN) * AUTOIP_TICKS_PER_SECOND) ) +
PROBE_MIN * AUTOIP_TICKS_PER_SECOND);
}
}
}
break;
case AUTOIP_STATE_ANNOUNCING:
if (autoip->ttw == 0) {
autoip_arp_announce(netif);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_tmr() ANNOUNCING Sent Announce\n"));
autoip->ttw = ANNOUNCE_INTERVAL * AUTOIP_TICKS_PER_SECOND;
autoip->sent_num++;
if (autoip->sent_num >= ANNOUNCE_NUM) {
autoip->state = AUTOIP_STATE_BOUND;
autoip->sent_num = 0;
autoip->ttw = 0;
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_tmr(): changing state to BOUND: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr),
ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr)));
}
}
break;
default:
/* nothing to do in other states */
break;
}
}
}
}
/**
* Handles every incoming ARP Packet, called by etharp_input().
*
* @param netif network interface to use for autoip processing
* @param hdr Incoming ARP packet
*/
void
autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
{
struct autoip *autoip = netif_autoip_data(netif);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_arp_reply()\n"));
if ((autoip != NULL) && (autoip->state != AUTOIP_STATE_OFF)) {
/* when ip.src == llipaddr && hw.src != netif->hwaddr
*
* when probing ip.dst == llipaddr && hw.src != netif->hwaddr
* we have a conflict and must solve it
*/
ip4_addr_t sipaddr, dipaddr;
struct eth_addr netifaddr;
SMEMCPY(netifaddr.addr, netif->hwaddr, ETH_HWADDR_LEN);
/* Copy struct ip4_addr_wordaligned to aligned ip4_addr, to support compilers without
* structure packing (not using structure copy which breaks strict-aliasing rules).
*/
IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T(&sipaddr, &hdr->sipaddr);
IPADDR_WORDALIGNED_COPY_TO_IP4_ADDR_T(&dipaddr, &hdr->dipaddr);
if (autoip->state == AUTOIP_STATE_PROBING) {
/* RFC 3927 Section 2.2.1:
* from beginning to after ANNOUNCE_WAIT
* seconds we have a conflict if
* ip.src == llipaddr OR
* ip.dst == llipaddr && hw.src != own hwaddr
*/
if ((ip4_addr_cmp(&sipaddr, &autoip->llipaddr)) ||
(ip4_addr_isany_val(sipaddr) &&
ip4_addr_cmp(&dipaddr, &autoip->llipaddr) &&
!eth_addr_cmp(&netifaddr, &hdr->shwaddr))) {
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING,
("autoip_arp_reply(): Probe Conflict detected\n"));
autoip_restart(netif);
}
} else {
/* RFC 3927 Section 2.5:
* in any state we have a conflict if
* ip.src == llipaddr && hw.src != own hwaddr
*/
if (ip4_addr_cmp(&sipaddr, &autoip->llipaddr) &&
!eth_addr_cmp(&netifaddr, &hdr->shwaddr)) {
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING,
("autoip_arp_reply(): Conflicting ARP-Packet detected\n"));
autoip_handle_arp_conflict(netif);
}
}
}
}
/** check if AutoIP supplied netif->ip_addr
*
* @param netif the netif to check
* @return 1 if AutoIP supplied netif->ip_addr (state BOUND or ANNOUNCING),
* 0 otherwise
*/
u8_t
autoip_supplied_address(const struct netif *netif)
{
if ((netif != NULL) && (netif_autoip_data(netif) != NULL)) {
struct autoip *autoip = netif_autoip_data(netif);
return (autoip->state == AUTOIP_STATE_BOUND) || (autoip->state == AUTOIP_STATE_ANNOUNCING);
}
return 0;
}
u8_t
autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr)
{
struct autoip *autoip = netif_autoip_data(netif);
return (autoip != NULL) && ip4_addr_cmp(addr, &(autoip->llipaddr));
}
#endif /* LWIP_IPV4 && LWIP_AUTOIP */

1990
core/ipv4/dhcp.c Executable file
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File diff suppressed because it is too large Load Diff

1203
core/ipv4/etharp.c Executable file
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File diff suppressed because it is too large Load Diff

404
core/ipv4/icmp.c Executable file
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@ -0,0 +1,404 @@
/**
* @file
* ICMP - Internet Control Message Protocol
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/* Some ICMP messages should be passed to the transport protocols. This
is not implemented. */
#include "lwip/opt.h"
#if LWIP_IPV4 && LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
#include "lwip/icmp.h"
#include "lwip/inet_chksum.h"
#include "lwip/ip.h"
#include "lwip/def.h"
#include "lwip/stats.h"
#include <string.h>
#ifdef LWIP_HOOK_FILENAME
#include LWIP_HOOK_FILENAME
#endif
/** Small optimization: set to 0 if incoming PBUF_POOL pbuf always can be
* used to modify and send a response packet (and to 1 if this is not the case,
* e.g. when link header is stripped off when receiving) */
#ifndef LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN
#define LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN 1
#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */
/* The amount of data from the original packet to return in a dest-unreachable */
#define ICMP_DEST_UNREACH_DATASIZE 8
static void icmp_send_response(struct pbuf *p, u8_t type, u8_t code);
/**
* Processes ICMP input packets, called from ip_input().
*
* Currently only processes icmp echo requests and sends
* out the echo response.
*
* @param p the icmp echo request packet, p->payload pointing to the icmp header
* @param inp the netif on which this packet was received
*/
void
icmp_input(struct pbuf *p, struct netif *inp)
{
u8_t type;
#ifdef LWIP_DEBUG
u8_t code;
#endif /* LWIP_DEBUG */
struct icmp_echo_hdr *iecho;
const struct ip_hdr *iphdr_in;
u16_t hlen;
const ip4_addr_t *src;
ICMP_STATS_INC(icmp.recv);
MIB2_STATS_INC(mib2.icmpinmsgs);
iphdr_in = ip4_current_header();
hlen = IPH_HL_BYTES(iphdr_in);
if (hlen < IP_HLEN) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: short IP header (%"S16_F" bytes) received\n", hlen));
goto lenerr;
}
if (p->len < sizeof(u16_t) * 2) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: short ICMP (%"U16_F" bytes) received\n", p->tot_len));
goto lenerr;
}
type = *((u8_t *)p->payload);
#ifdef LWIP_DEBUG
code = *(((u8_t *)p->payload) + 1);
/* if debug is enabled but debug statement below is somehow disabled: */
LWIP_UNUSED_ARG(code);
#endif /* LWIP_DEBUG */
switch (type) {
case ICMP_ER:
/* This is OK, echo reply might have been parsed by a raw PCB
(as obviously, an echo request has been sent, too). */
MIB2_STATS_INC(mib2.icmpinechoreps);
break;
case ICMP_ECHO:
MIB2_STATS_INC(mib2.icmpinechos);
src = ip4_current_dest_addr();
/* multicast destination address? */
if (ip4_addr_ismulticast(ip4_current_dest_addr())) {
#if LWIP_MULTICAST_PING
/* For multicast, use address of receiving interface as source address */
src = netif_ip4_addr(inp);
#else /* LWIP_MULTICAST_PING */
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: Not echoing to multicast pings\n"));
goto icmperr;
#endif /* LWIP_MULTICAST_PING */
}
/* broadcast destination address? */
if (ip4_addr_isbroadcast(ip4_current_dest_addr(), ip_current_netif())) {
#if LWIP_BROADCAST_PING
/* For broadcast, use address of receiving interface as source address */
src = netif_ip4_addr(inp);
#else /* LWIP_BROADCAST_PING */
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: Not echoing to broadcast pings\n"));
goto icmperr;
#endif /* LWIP_BROADCAST_PING */
}
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ping\n"));
if (p->tot_len < sizeof(struct icmp_echo_hdr)) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: bad ICMP echo received\n"));
goto lenerr;
}
#if CHECKSUM_CHECK_ICMP
IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_CHECK_ICMP) {
if (inet_chksum_pbuf(p) != 0) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo\n"));
pbuf_free(p);
ICMP_STATS_INC(icmp.chkerr);
MIB2_STATS_INC(mib2.icmpinerrors);
return;
}
}
#endif
#if LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN
if (pbuf_add_header(p, hlen + PBUF_LINK_HLEN + PBUF_LINK_ENCAPSULATION_HLEN)) {
/* p is not big enough to contain link headers
* allocate a new one and copy p into it
*/
struct pbuf *r;
u16_t alloc_len = (u16_t)(p->tot_len + hlen);
if (alloc_len < p->tot_len) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: allocating new pbuf failed (tot_len overflow)\n"));
goto icmperr;
}
/* allocate new packet buffer with space for link headers */
r = pbuf_alloc(PBUF_LINK, alloc_len, PBUF_RAM);
if (r == NULL) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: allocating new pbuf failed\n"));
goto icmperr;
}
if (r->len < hlen + sizeof(struct icmp_echo_hdr)) {
LWIP_DEBUGF(ICMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("first pbuf cannot hold the ICMP header"));
pbuf_free(r);
goto icmperr;
}
/* copy the ip header */
MEMCPY(r->payload, iphdr_in, hlen);
/* switch r->payload back to icmp header (cannot fail) */
if (pbuf_remove_header(r, hlen)) {
LWIP_ASSERT("icmp_input: moving r->payload to icmp header failed\n", 0);
pbuf_free(r);
goto icmperr;
}
/* copy the rest of the packet without ip header */
if (pbuf_copy(r, p) != ERR_OK) {
LWIP_DEBUGF(ICMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("icmp_input: copying to new pbuf failed"));
pbuf_free(r);
goto icmperr;
}
/* free the original p */
pbuf_free(p);
/* we now have an identical copy of p that has room for link headers */
p = r;
} else {
/* restore p->payload to point to icmp header (cannot fail) */
if (pbuf_remove_header(p, hlen + PBUF_LINK_HLEN + PBUF_LINK_ENCAPSULATION_HLEN)) {
LWIP_ASSERT("icmp_input: restoring original p->payload failed\n", 0);
goto icmperr;
}
}
#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */
/* At this point, all checks are OK. */
/* We generate an answer by switching the dest and src ip addresses,
* setting the icmp type to ECHO_RESPONSE and updating the checksum. */
iecho = (struct icmp_echo_hdr *)p->payload;
if (pbuf_add_header(p, hlen)) {
LWIP_DEBUGF(ICMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("Can't move over header in packet"));
} else {
err_t ret;
struct ip_hdr *iphdr = (struct ip_hdr *)p->payload;
ip4_addr_copy(iphdr->src, *src);
ip4_addr_copy(iphdr->dest, *ip4_current_src_addr());
ICMPH_TYPE_SET(iecho, ICMP_ER);
#if CHECKSUM_GEN_ICMP
IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_ICMP) {
/* adjust the checksum */
if (iecho->chksum > PP_HTONS(0xffffU - (ICMP_ECHO << 8))) {
iecho->chksum = (u16_t)(iecho->chksum + PP_HTONS((u16_t)(ICMP_ECHO << 8)) + 1);
} else {
iecho->chksum = (u16_t)(iecho->chksum + PP_HTONS(ICMP_ECHO << 8));
}
}
#if LWIP_CHECKSUM_CTRL_PER_NETIF
else {
iecho->chksum = 0;
}
#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */
#else /* CHECKSUM_GEN_ICMP */
iecho->chksum = 0;
#endif /* CHECKSUM_GEN_ICMP */
/* Set the correct TTL and recalculate the header checksum. */
IPH_TTL_SET(iphdr, ICMP_TTL);
IPH_CHKSUM_SET(iphdr, 0);
#if CHECKSUM_GEN_IP
IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_IP) {
IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, hlen));
}
#endif /* CHECKSUM_GEN_IP */
ICMP_STATS_INC(icmp.xmit);
/* increase number of messages attempted to send */
MIB2_STATS_INC(mib2.icmpoutmsgs);
/* increase number of echo replies attempted to send */
MIB2_STATS_INC(mib2.icmpoutechoreps);
/* send an ICMP packet */
ret = ip4_output_if(p, src, LWIP_IP_HDRINCL,
ICMP_TTL, 0, IP_PROTO_ICMP, inp);
if (ret != ERR_OK) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ip_output_if returned an error: %s\n", lwip_strerr(ret)));
}
}
break;
default:
if (type == ICMP_DUR) {
MIB2_STATS_INC(mib2.icmpindestunreachs);
} else if (type == ICMP_TE) {
MIB2_STATS_INC(mib2.icmpintimeexcds);
} else if (type == ICMP_PP) {
MIB2_STATS_INC(mib2.icmpinparmprobs);
} else if (type == ICMP_SQ) {
MIB2_STATS_INC(mib2.icmpinsrcquenchs);
} else if (type == ICMP_RD) {
MIB2_STATS_INC(mib2.icmpinredirects);
} else if (type == ICMP_TS) {
MIB2_STATS_INC(mib2.icmpintimestamps);
} else if (type == ICMP_TSR) {
MIB2_STATS_INC(mib2.icmpintimestampreps);
} else if (type == ICMP_AM) {
MIB2_STATS_INC(mib2.icmpinaddrmasks);
} else if (type == ICMP_AMR) {
MIB2_STATS_INC(mib2.icmpinaddrmaskreps);
}
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %"S16_F" code %"S16_F" not supported.\n",
(s16_t)type, (s16_t)code));
ICMP_STATS_INC(icmp.proterr);
ICMP_STATS_INC(icmp.drop);
}
pbuf_free(p);
return;
lenerr:
pbuf_free(p);
ICMP_STATS_INC(icmp.lenerr);
MIB2_STATS_INC(mib2.icmpinerrors);
return;
#if LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN || !LWIP_MULTICAST_PING || !LWIP_BROADCAST_PING
icmperr:
pbuf_free(p);
ICMP_STATS_INC(icmp.err);
MIB2_STATS_INC(mib2.icmpinerrors);
return;
#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN || !LWIP_MULTICAST_PING || !LWIP_BROADCAST_PING */
}
/**
* Send an icmp 'destination unreachable' packet, called from ip_input() if
* the transport layer protocol is unknown and from udp_input() if the local
* port is not bound.
*
* @param p the input packet for which the 'unreachable' should be sent,
* p->payload pointing to the IP header
* @param t type of the 'unreachable' packet
*/
void
icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
{
MIB2_STATS_INC(mib2.icmpoutdestunreachs);
icmp_send_response(p, ICMP_DUR, t);
}
#if IP_FORWARD || IP_REASSEMBLY
/**
* Send a 'time exceeded' packet, called from ip_forward() if TTL is 0.
*
* @param p the input packet for which the 'time exceeded' should be sent,
* p->payload pointing to the IP header
* @param t type of the 'time exceeded' packet
*/
void
icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
{
MIB2_STATS_INC(mib2.icmpouttimeexcds);
icmp_send_response(p, ICMP_TE, t);
}
#endif /* IP_FORWARD || IP_REASSEMBLY */
/**
* Send an icmp packet in response to an incoming packet.
*
* @param p the input packet for which the 'unreachable' should be sent,
* p->payload pointing to the IP header
* @param type Type of the ICMP header
* @param code Code of the ICMP header
*/
static void
icmp_send_response(struct pbuf *p, u8_t type, u8_t code)
{
struct pbuf *q;
struct ip_hdr *iphdr;
/* we can use the echo header here */
struct icmp_echo_hdr *icmphdr;
ip4_addr_t iphdr_src;
struct netif *netif;
/* increase number of messages attempted to send */
MIB2_STATS_INC(mib2.icmpoutmsgs);
/* ICMP header + IP header + 8 bytes of data */
q = pbuf_alloc(PBUF_IP, sizeof(struct icmp_echo_hdr) + IP_HLEN + ICMP_DEST_UNREACH_DATASIZE,
PBUF_RAM);
if (q == NULL) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded: failed to allocate pbuf for ICMP packet.\n"));
MIB2_STATS_INC(mib2.icmpouterrors);
return;
}
LWIP_ASSERT("check that first pbuf can hold icmp message",
(q->len >= (sizeof(struct icmp_echo_hdr) + IP_HLEN + ICMP_DEST_UNREACH_DATASIZE)));
iphdr = (struct ip_hdr *)p->payload;
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded from "));
ip4_addr_debug_print_val(ICMP_DEBUG, iphdr->src);
LWIP_DEBUGF(ICMP_DEBUG, (" to "));
ip4_addr_debug_print_val(ICMP_DEBUG, iphdr->dest);
LWIP_DEBUGF(ICMP_DEBUG, ("\n"));
icmphdr = (struct icmp_echo_hdr *)q->payload;
icmphdr->type = type;
icmphdr->code = code;
icmphdr->id = 0;
icmphdr->seqno = 0;
/* copy fields from original packet */
SMEMCPY((u8_t *)q->payload + sizeof(struct icmp_echo_hdr), (u8_t *)p->payload,
IP_HLEN + ICMP_DEST_UNREACH_DATASIZE);
ip4_addr_copy(iphdr_src, iphdr->src);
#ifdef LWIP_HOOK_IP4_ROUTE_SRC
{
ip4_addr_t iphdr_dst;
ip4_addr_copy(iphdr_dst, iphdr->dest);
netif = ip4_route_src(&iphdr_dst, &iphdr_src);
}
#else
netif = ip4_route(&iphdr_src);
#endif
if (netif != NULL) {
/* calculate checksum */
icmphdr->chksum = 0;
#if CHECKSUM_GEN_ICMP
IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP) {
icmphdr->chksum = inet_chksum(icmphdr, q->len);
}
#endif
ICMP_STATS_INC(icmp.xmit);
ip4_output_if(q, NULL, &iphdr_src, ICMP_TTL, 0, IP_PROTO_ICMP, netif);
}
pbuf_free(q);
}
#endif /* LWIP_IPV4 && LWIP_ICMP */

801
core/ipv4/igmp.c Executable file
View File

@ -0,0 +1,801 @@
/**
* @file
* IGMP - Internet Group Management Protocol
*
* @defgroup igmp IGMP
* @ingroup ip4
* To be called from TCPIP thread
*/
/*
* Copyright (c) 2002 CITEL Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is a contribution to the lwIP TCP/IP stack.
* The Swedish Institute of Computer Science and Adam Dunkels
* are specifically granted permission to redistribute this
* source code.
*/
/*-------------------------------------------------------------
Note 1)
Although the rfc requires V1 AND V2 capability
we will only support v2 since now V1 is very old (August 1989)
V1 can be added if required
a debug print and statistic have been implemented to
show this up.
-------------------------------------------------------------
-------------------------------------------------------------
Note 2)
A query for a specific group address (as opposed to ALLHOSTS)
has now been implemented as I am unsure if it is required
a debug print and statistic have been implemented to
show this up.
-------------------------------------------------------------
-------------------------------------------------------------
Note 3)
The router alert rfc 2113 is implemented in outgoing packets
but not checked rigorously incoming
-------------------------------------------------------------
Steve Reynolds
------------------------------------------------------------*/
/*-----------------------------------------------------------------------------
* RFC 988 - Host extensions for IP multicasting - V0
* RFC 1054 - Host extensions for IP multicasting -
* RFC 1112 - Host extensions for IP multicasting - V1
* RFC 2236 - Internet Group Management Protocol, Version 2 - V2 <- this code is based on this RFC (it's the "de facto" standard)
* RFC 3376 - Internet Group Management Protocol, Version 3 - V3
* RFC 4604 - Using Internet Group Management Protocol Version 3... - V3+
* RFC 2113 - IP Router Alert Option -
*----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------
* Includes
*----------------------------------------------------------------------------*/
#include "lwip/opt.h"
#if LWIP_IPV4 && LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
#include "lwip/igmp.h"
#include "lwip/debug.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/ip.h"
#include "lwip/inet_chksum.h"
#include "lwip/netif.h"
#include "lwip/stats.h"
#include "lwip/prot/igmp.h"
#include <string.h>
static struct igmp_group *igmp_lookup_group(struct netif *ifp, const ip4_addr_t *addr);
static err_t igmp_remove_group(struct netif *netif, struct igmp_group *group);
static void igmp_timeout(struct netif *netif, struct igmp_group *group);
static void igmp_start_timer(struct igmp_group *group, u8_t max_time);
static void igmp_delaying_member(struct igmp_group *group, u8_t maxresp);
static err_t igmp_ip_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, struct netif *netif);
static void igmp_send(struct netif *netif, struct igmp_group *group, u8_t type);
static ip4_addr_t allsystems;
static ip4_addr_t allrouters;
/**
* Initialize the IGMP module
*/
void
igmp_init(void)
{
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_init: initializing\n"));
IP4_ADDR(&allsystems, 224, 0, 0, 1);
IP4_ADDR(&allrouters, 224, 0, 0, 2);
}
/**
* Start IGMP processing on interface
*
* @param netif network interface on which start IGMP processing
*/
err_t
igmp_start(struct netif *netif)
{
struct igmp_group *group;
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_start: starting IGMP processing on if %p\n", (void *)netif));
group = igmp_lookup_group(netif, &allsystems);
if (group != NULL) {
group->group_state = IGMP_GROUP_IDLE_MEMBER;
group->use++;
/* Allow the igmp messages at the MAC level */
if (netif->igmp_mac_filter != NULL) {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_start: igmp_mac_filter(ADD "));
ip4_addr_debug_print_val(IGMP_DEBUG, allsystems);
LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", (void *)netif));
netif->igmp_mac_filter(netif, &allsystems, NETIF_ADD_MAC_FILTER);
}
return ERR_OK;
}
return ERR_MEM;
}
/**
* Stop IGMP processing on interface
*
* @param netif network interface on which stop IGMP processing
*/
err_t
igmp_stop(struct netif *netif)
{
struct igmp_group *group = netif_igmp_data(netif);
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_IGMP, NULL);
while (group != NULL) {
struct igmp_group *next = group->next; /* avoid use-after-free below */
/* disable the group at the MAC level */
if (netif->igmp_mac_filter != NULL) {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_stop: igmp_mac_filter(DEL "));
ip4_addr_debug_print_val(IGMP_DEBUG, group->group_address);
LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", (void *)netif));
netif->igmp_mac_filter(netif, &(group->group_address), NETIF_DEL_MAC_FILTER);
}
/* free group */
memp_free(MEMP_IGMP_GROUP, group);
/* move to "next" */
group = next;
}
return ERR_OK;
}
/**
* Report IGMP memberships for this interface
*
* @param netif network interface on which report IGMP memberships
*/
void
igmp_report_groups(struct netif *netif)
{
struct igmp_group *group = netif_igmp_data(netif);
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_report_groups: sending IGMP reports on if %p\n", (void *)netif));
/* Skip the first group in the list, it is always the allsystems group added in igmp_start() */
if (group != NULL) {
group = group->next;
}
while (group != NULL) {
igmp_delaying_member(group, IGMP_JOIN_DELAYING_MEMBER_TMR);
group = group->next;
}
}
/**
* Search for a group in the netif's igmp group list
*
* @param ifp the network interface for which to look
* @param addr the group ip address to search for
* @return a struct igmp_group* if the group has been found,
* NULL if the group wasn't found.
*/
struct igmp_group *
igmp_lookfor_group(struct netif *ifp, const ip4_addr_t *addr)
{
struct igmp_group *group = netif_igmp_data(ifp);
while (group != NULL) {
if (ip4_addr_cmp(&(group->group_address), addr)) {
return group;
}
group = group->next;
}
/* to be clearer, we return NULL here instead of
* 'group' (which is also NULL at this point).
*/
return NULL;
}
/**
* Search for a specific igmp group and create a new one if not found-
*
* @param ifp the network interface for which to look
* @param addr the group ip address to search
* @return a struct igmp_group*,
* NULL on memory error.
*/
static struct igmp_group *
igmp_lookup_group(struct netif *ifp, const ip4_addr_t *addr)
{
struct igmp_group *group;
struct igmp_group *list_head = netif_igmp_data(ifp);
/* Search if the group already exists */
group = igmp_lookfor_group(ifp, addr);
if (group != NULL) {
/* Group already exists. */
return group;
}
/* Group doesn't exist yet, create a new one */
group = (struct igmp_group *)memp_malloc(MEMP_IGMP_GROUP);
if (group != NULL) {
ip4_addr_set(&(group->group_address), addr);
group->timer = 0; /* Not running */
group->group_state = IGMP_GROUP_NON_MEMBER;
group->last_reporter_flag = 0;
group->use = 0;
/* Ensure allsystems group is always first in list */
if (list_head == NULL) {
/* this is the first entry in linked list */
LWIP_ASSERT("igmp_lookup_group: first group must be allsystems",
(ip4_addr_cmp(addr, &allsystems) != 0));
group->next = NULL;
netif_set_client_data(ifp, LWIP_NETIF_CLIENT_DATA_INDEX_IGMP, group);
} else {
/* append _after_ first entry */
LWIP_ASSERT("igmp_lookup_group: all except first group must not be allsystems",
(ip4_addr_cmp(addr, &allsystems) == 0));
group->next = list_head->next;
list_head->next = group;
}
}
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_lookup_group: %sallocated a new group with address ", (group ? "" : "impossible to ")));
ip4_addr_debug_print(IGMP_DEBUG, addr);
LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", (void *)ifp));
return group;
}
/**
* Remove a group from netif's igmp group list, but don't free it yet
*
* @param group the group to remove from the netif's igmp group list
* @return ERR_OK if group was removed from the list, an err_t otherwise
*/
static err_t
igmp_remove_group(struct netif *netif, struct igmp_group *group)
{
err_t err = ERR_OK;
struct igmp_group *tmp_group;
/* Skip the first group in the list, it is always the allsystems group added in igmp_start() */
for (tmp_group = netif_igmp_data(netif); tmp_group != NULL; tmp_group = tmp_group->next) {
if (tmp_group->next == group) {
tmp_group->next = group->next;
break;
}
}
/* Group not found in netif's igmp group list */
if (tmp_group == NULL) {
err = ERR_ARG;
}
return err;
}
/**
* Called from ip_input() if a new IGMP packet is received.
*
* @param p received igmp packet, p->payload pointing to the igmp header
* @param inp network interface on which the packet was received
* @param dest destination ip address of the igmp packet
*/
void
igmp_input(struct pbuf *p, struct netif *inp, const ip4_addr_t *dest)
{
struct igmp_msg *igmp;
struct igmp_group *group;
struct igmp_group *groupref;
IGMP_STATS_INC(igmp.recv);
/* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */
if (p->len < IGMP_MINLEN) {
pbuf_free(p);
IGMP_STATS_INC(igmp.lenerr);
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: length error\n"));
return;
}
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: message from "));
ip4_addr_debug_print_val(IGMP_DEBUG, ip4_current_header()->src);
LWIP_DEBUGF(IGMP_DEBUG, (" to address "));
ip4_addr_debug_print_val(IGMP_DEBUG, ip4_current_header()->dest);
LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", (void *)inp));
/* Now calculate and check the checksum */
igmp = (struct igmp_msg *)p->payload;
if (inet_chksum(igmp, p->len)) {
pbuf_free(p);
IGMP_STATS_INC(igmp.chkerr);
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: checksum error\n"));
return;
}
/* Packet is ok so find an existing group */
group = igmp_lookfor_group(inp, dest); /* use the destination IP address of incoming packet */
/* If group can be found or create... */
if (!group) {
pbuf_free(p);
IGMP_STATS_INC(igmp.drop);
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP frame not for us\n"));
return;
}
/* NOW ACT ON THE INCOMING MESSAGE TYPE... */
switch (igmp->igmp_msgtype) {
case IGMP_MEMB_QUERY:
/* IGMP_MEMB_QUERY to the "all systems" address ? */
if ((ip4_addr_cmp(dest, &allsystems)) && ip4_addr_isany(&igmp->igmp_group_address)) {
/* THIS IS THE GENERAL QUERY */
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: General IGMP_MEMB_QUERY on \"ALL SYSTEMS\" address (224.0.0.1) [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp)));
if (igmp->igmp_maxresp == 0) {
IGMP_STATS_INC(igmp.rx_v1);
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: got an all hosts query with time== 0 - this is V1 and not implemented - treat as v2\n"));
igmp->igmp_maxresp = IGMP_V1_DELAYING_MEMBER_TMR;
} else {
IGMP_STATS_INC(igmp.rx_general);
}
groupref = netif_igmp_data(inp);
/* Do not send messages on the all systems group address! */
/* Skip the first group in the list, it is always the allsystems group added in igmp_start() */
if (groupref != NULL) {
groupref = groupref->next;
}
while (groupref) {
igmp_delaying_member(groupref, igmp->igmp_maxresp);
groupref = groupref->next;
}
} else {
/* IGMP_MEMB_QUERY to a specific group ? */
if (!ip4_addr_isany(&igmp->igmp_group_address)) {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP_MEMB_QUERY to a specific group "));
ip4_addr_debug_print_val(IGMP_DEBUG, igmp->igmp_group_address);
if (ip4_addr_cmp(dest, &allsystems)) {
ip4_addr_t groupaddr;
LWIP_DEBUGF(IGMP_DEBUG, (" using \"ALL SYSTEMS\" address (224.0.0.1) [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp)));
/* we first need to re-look for the group since we used dest last time */
ip4_addr_copy(groupaddr, igmp->igmp_group_address);
group = igmp_lookfor_group(inp, &groupaddr);
} else {
LWIP_DEBUGF(IGMP_DEBUG, (" with the group address as destination [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp)));
}
if (group != NULL) {
IGMP_STATS_INC(igmp.rx_group);
igmp_delaying_member(group, igmp->igmp_maxresp);
} else {
IGMP_STATS_INC(igmp.drop);
}
} else {
IGMP_STATS_INC(igmp.proterr);
}
}
break;
case IGMP_V2_MEMB_REPORT:
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP_V2_MEMB_REPORT\n"));
IGMP_STATS_INC(igmp.rx_report);
if (group->group_state == IGMP_GROUP_DELAYING_MEMBER) {
/* This is on a specific group we have already looked up */
group->timer = 0; /* stopped */
group->group_state = IGMP_GROUP_IDLE_MEMBER;
group->last_reporter_flag = 0;
}
break;
default:
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: unexpected msg %d in state %d on group %p on if %p\n",
igmp->igmp_msgtype, group->group_state, (void *)&group, (void *)inp));
IGMP_STATS_INC(igmp.proterr);
break;
}
pbuf_free(p);
return;
}
/**
* @ingroup igmp
* Join a group on one network interface.
*
* @param ifaddr ip address of the network interface which should join a new group
* @param groupaddr the ip address of the group which to join
* @return ERR_OK if group was joined on the netif(s), an err_t otherwise
*/
err_t
igmp_joingroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr)
{
err_t err = ERR_VAL; /* no matching interface */
struct netif *netif;
LWIP_ASSERT_CORE_LOCKED();
/* make sure it is multicast address */
LWIP_ERROR("igmp_joingroup: attempt to join non-multicast address", ip4_addr_ismulticast(groupaddr), return ERR_VAL;);
LWIP_ERROR("igmp_joingroup: attempt to join allsystems address", (!ip4_addr_cmp(groupaddr, &allsystems)), return ERR_VAL;);
/* loop through netif's */
NETIF_FOREACH(netif) {
/* Should we join this interface ? */
if ((netif->flags & NETIF_FLAG_IGMP) && ((ip4_addr_isany(ifaddr) || ip4_addr_cmp(netif_ip4_addr(netif), ifaddr)))) {
err = igmp_joingroup_netif(netif, groupaddr);
if (err != ERR_OK) {
/* Return an error even if some network interfaces are joined */
/** @todo undo any other netif already joined */
return err;
}
}
}
return err;
}
/**
* @ingroup igmp
* Join a group on one network interface.
*
* @param netif the network interface which should join a new group
* @param groupaddr the ip address of the group which to join
* @return ERR_OK if group was joined on the netif, an err_t otherwise
*/
err_t
igmp_joingroup_netif(struct netif *netif, const ip4_addr_t *groupaddr)
{
struct igmp_group *group;
LWIP_ASSERT_CORE_LOCKED();
/* make sure it is multicast address */
LWIP_ERROR("igmp_joingroup_netif: attempt to join non-multicast address", ip4_addr_ismulticast(groupaddr), return ERR_VAL;);
LWIP_ERROR("igmp_joingroup_netif: attempt to join allsystems address", (!ip4_addr_cmp(groupaddr, &allsystems)), return ERR_VAL;);
/* make sure it is an igmp-enabled netif */
LWIP_ERROR("igmp_joingroup_netif: attempt to join on non-IGMP netif", netif->flags & NETIF_FLAG_IGMP, return ERR_VAL;);
/* find group or create a new one if not found */
group = igmp_lookup_group(netif, groupaddr);
if (group != NULL) {
/* This should create a new group, check the state to make sure */
if (group->group_state != IGMP_GROUP_NON_MEMBER) {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup_netif: join to group not in state IGMP_GROUP_NON_MEMBER\n"));
} else {
/* OK - it was new group */
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup_netif: join to new group: "));
ip4_addr_debug_print(IGMP_DEBUG, groupaddr);
LWIP_DEBUGF(IGMP_DEBUG, ("\n"));
/* If first use of the group, allow the group at the MAC level */
if ((group->use == 0) && (netif->igmp_mac_filter != NULL)) {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup_netif: igmp_mac_filter(ADD "));
ip4_addr_debug_print(IGMP_DEBUG, groupaddr);
LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", (void *)netif));
netif->igmp_mac_filter(netif, groupaddr, NETIF_ADD_MAC_FILTER);
}
IGMP_STATS_INC(igmp.tx_join);
igmp_send(netif, group, IGMP_V2_MEMB_REPORT);
igmp_start_timer(group, IGMP_JOIN_DELAYING_MEMBER_TMR);
/* Need to work out where this timer comes from */
group->group_state = IGMP_GROUP_DELAYING_MEMBER;
}
/* Increment group use */
group->use++;
/* Join on this interface */
return ERR_OK;
} else {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup_netif: Not enough memory to join to group\n"));
return ERR_MEM;
}
}
/**
* @ingroup igmp
* Leave a group on one network interface.
*
* @param ifaddr ip address of the network interface which should leave a group
* @param groupaddr the ip address of the group which to leave
* @return ERR_OK if group was left on the netif(s), an err_t otherwise
*/
err_t
igmp_leavegroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr)
{
err_t err = ERR_VAL; /* no matching interface */
struct netif *netif;
LWIP_ASSERT_CORE_LOCKED();
/* make sure it is multicast address */
LWIP_ERROR("igmp_leavegroup: attempt to leave non-multicast address", ip4_addr_ismulticast(groupaddr), return ERR_VAL;);
LWIP_ERROR("igmp_leavegroup: attempt to leave allsystems address", (!ip4_addr_cmp(groupaddr, &allsystems)), return ERR_VAL;);
/* loop through netif's */
NETIF_FOREACH(netif) {
/* Should we leave this interface ? */
if ((netif->flags & NETIF_FLAG_IGMP) && ((ip4_addr_isany(ifaddr) || ip4_addr_cmp(netif_ip4_addr(netif), ifaddr)))) {
err_t res = igmp_leavegroup_netif(netif, groupaddr);
if (err != ERR_OK) {
/* Store this result if we have not yet gotten a success */
err = res;
}
}
}
return err;
}
/**
* @ingroup igmp
* Leave a group on one network interface.
*
* @param netif the network interface which should leave a group
* @param groupaddr the ip address of the group which to leave
* @return ERR_OK if group was left on the netif, an err_t otherwise
*/
err_t
igmp_leavegroup_netif(struct netif *netif, const ip4_addr_t *groupaddr)
{
struct igmp_group *group;
LWIP_ASSERT_CORE_LOCKED();
/* make sure it is multicast address */
LWIP_ERROR("igmp_leavegroup_netif: attempt to leave non-multicast address", ip4_addr_ismulticast(groupaddr), return ERR_VAL;);
LWIP_ERROR("igmp_leavegroup_netif: attempt to leave allsystems address", (!ip4_addr_cmp(groupaddr, &allsystems)), return ERR_VAL;);
/* make sure it is an igmp-enabled netif */
LWIP_ERROR("igmp_leavegroup_netif: attempt to leave on non-IGMP netif", netif->flags & NETIF_FLAG_IGMP, return ERR_VAL;);
/* find group */
group = igmp_lookfor_group(netif, groupaddr);
if (group != NULL) {
/* Only send a leave if the flag is set according to the state diagram */
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup_netif: Leaving group: "));
ip4_addr_debug_print(IGMP_DEBUG, groupaddr);
LWIP_DEBUGF(IGMP_DEBUG, ("\n"));
/* If there is no other use of the group */
if (group->use <= 1) {
/* Remove the group from the list */
igmp_remove_group(netif, group);
/* If we are the last reporter for this group */
if (group->last_reporter_flag) {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup_netif: sending leaving group\n"));
IGMP_STATS_INC(igmp.tx_leave);
igmp_send(netif, group, IGMP_LEAVE_GROUP);
}
/* Disable the group at the MAC level */
if (netif->igmp_mac_filter != NULL) {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup_netif: igmp_mac_filter(DEL "));
ip4_addr_debug_print(IGMP_DEBUG, groupaddr);
LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", (void *)netif));
netif->igmp_mac_filter(netif, groupaddr, NETIF_DEL_MAC_FILTER);
}
/* Free group struct */
memp_free(MEMP_IGMP_GROUP, group);
} else {
/* Decrement group use */
group->use--;
}
return ERR_OK;
} else {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup_netif: not member of group\n"));
return ERR_VAL;
}
}
/**
* The igmp timer function (both for NO_SYS=1 and =0)
* Should be called every IGMP_TMR_INTERVAL milliseconds (100 ms is default).
*/
void
igmp_tmr(void)
{
struct netif *netif;
NETIF_FOREACH(netif) {
struct igmp_group *group = netif_igmp_data(netif);
while (group != NULL) {
if (group->timer > 0) {
group->timer--;
if (group->timer == 0) {
igmp_timeout(netif, group);
}
}
group = group->next;
}
}
}
/**
* Called if a timeout for one group is reached.
* Sends a report for this group.
*
* @param group an igmp_group for which a timeout is reached
*/
static void
igmp_timeout(struct netif *netif, struct igmp_group *group)
{
/* If the state is IGMP_GROUP_DELAYING_MEMBER then we send a report for this group
(unless it is the allsystems group) */
if ((group->group_state == IGMP_GROUP_DELAYING_MEMBER) &&
(!(ip4_addr_cmp(&(group->group_address), &allsystems)))) {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_timeout: report membership for group with address "));
ip4_addr_debug_print_val(IGMP_DEBUG, group->group_address);
LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", (void *)netif));
group->group_state = IGMP_GROUP_IDLE_MEMBER;
IGMP_STATS_INC(igmp.tx_report);
igmp_send(netif, group, IGMP_V2_MEMB_REPORT);
}
}
/**
* Start a timer for an igmp group
*
* @param group the igmp_group for which to start a timer
* @param max_time the time in multiples of IGMP_TMR_INTERVAL (decrease with
* every call to igmp_tmr())
*/
static void
igmp_start_timer(struct igmp_group *group, u8_t max_time)
{
#ifdef LWIP_RAND
group->timer = (u16_t)(max_time > 2 ? (LWIP_RAND() % max_time) : 1);
#else /* LWIP_RAND */
/* ATTENTION: use this only if absolutely necessary! */
group->timer = max_time / 2;
#endif /* LWIP_RAND */
if (group->timer == 0) {
group->timer = 1;
}
}
/**
* Delaying membership report for a group if necessary
*
* @param group the igmp_group for which "delaying" membership report
* @param maxresp query delay
*/
static void
igmp_delaying_member(struct igmp_group *group, u8_t maxresp)
{
if ((group->group_state == IGMP_GROUP_IDLE_MEMBER) ||
((group->group_state == IGMP_GROUP_DELAYING_MEMBER) &&
((group->timer == 0) || (maxresp < group->timer)))) {
igmp_start_timer(group, maxresp);
group->group_state = IGMP_GROUP_DELAYING_MEMBER;
}
}
/**
* Sends an IP packet on a network interface. This function constructs the IP header
* and calculates the IP header checksum. If the source IP address is NULL,
* the IP address of the outgoing network interface is filled in as source address.
*
* @param p the packet to send (p->payload points to the data, e.g. next
protocol header; if dest == LWIP_IP_HDRINCL, p already includes an
IP header and p->payload points to that IP header)
* @param src the source IP address to send from (if src == IP4_ADDR_ANY, the
* IP address of the netif used to send is used as source address)
* @param dest the destination IP address to send the packet to
* @param netif the netif on which to send this packet
* @return ERR_OK if the packet was sent OK
* ERR_BUF if p doesn't have enough space for IP/LINK headers
* returns errors returned by netif->output
*/
static err_t
igmp_ip_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest, struct netif *netif)
{
/* This is the "router alert" option */
u16_t ra[2];
ra[0] = PP_HTONS(ROUTER_ALERT);
ra[1] = 0x0000; /* Router shall examine packet */
IGMP_STATS_INC(igmp.xmit);
return ip4_output_if_opt(p, src, dest, IGMP_TTL, 0, IP_PROTO_IGMP, netif, ra, ROUTER_ALERTLEN);
}
/**
* Send an igmp packet to a specific group.
*
* @param group the group to which to send the packet
* @param type the type of igmp packet to send
*/
static void
igmp_send(struct netif *netif, struct igmp_group *group, u8_t type)
{
struct pbuf *p = NULL;
struct igmp_msg *igmp = NULL;
ip4_addr_t src = *IP4_ADDR_ANY4;
ip4_addr_t *dest = NULL;
/* IP header + "router alert" option + IGMP header */
p = pbuf_alloc(PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM);
if (p) {
igmp = (struct igmp_msg *)p->payload;
LWIP_ASSERT("igmp_send: check that first pbuf can hold struct igmp_msg",
(p->len >= sizeof(struct igmp_msg)));
ip4_addr_copy(src, *netif_ip4_addr(netif));
if (type == IGMP_V2_MEMB_REPORT) {
dest = &(group->group_address);
ip4_addr_copy(igmp->igmp_group_address, group->group_address);
group->last_reporter_flag = 1; /* Remember we were the last to report */
} else {
if (type == IGMP_LEAVE_GROUP) {
dest = &allrouters;
ip4_addr_copy(igmp->igmp_group_address, group->group_address);
}
}
if ((type == IGMP_V2_MEMB_REPORT) || (type == IGMP_LEAVE_GROUP)) {
igmp->igmp_msgtype = type;
igmp->igmp_maxresp = 0;
igmp->igmp_checksum = 0;
igmp->igmp_checksum = inet_chksum(igmp, IGMP_MINLEN);
igmp_ip_output_if(p, &src, dest, netif);
}
pbuf_free(p);
} else {
LWIP_DEBUGF(IGMP_DEBUG, ("igmp_send: not enough memory for igmp_send\n"));
IGMP_STATS_INC(igmp.memerr);
}
}
#endif /* LWIP_IPV4 && LWIP_IGMP */

1132
core/ipv4/ip4.c Executable file
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core/ipv4/ip4_addr.c Executable file
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/**
* @file
* This is the IPv4 address tools implementation.
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#if LWIP_IPV4
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
/* used by IP4_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */
const ip_addr_t ip_addr_any = IPADDR4_INIT(IPADDR_ANY);
const ip_addr_t ip_addr_broadcast = IPADDR4_INIT(IPADDR_BROADCAST);
/**
* Determine if an address is a broadcast address on a network interface
*
* @param addr address to be checked
* @param netif the network interface against which the address is checked
* @return returns non-zero if the address is a broadcast address
*/
u8_t
ip4_addr_isbroadcast_u32(u32_t addr, const struct netif *netif)
{
ip4_addr_t ipaddr;
ip4_addr_set_u32(&ipaddr, addr);
/* all ones (broadcast) or all zeroes (old skool broadcast) */
if ((~addr == IPADDR_ANY) ||
(addr == IPADDR_ANY)) {
return 1;
/* no broadcast support on this network interface? */
} else if ((netif->flags & NETIF_FLAG_BROADCAST) == 0) {
/* the given address cannot be a broadcast address
* nor can we check against any broadcast addresses */
return 0;
/* address matches network interface address exactly? => no broadcast */
} else if (addr == ip4_addr_get_u32(netif_ip4_addr(netif))) {
return 0;
/* on the same (sub) network... */
} else if (ip4_addr_netcmp(&ipaddr, netif_ip4_addr(netif), netif_ip4_netmask(netif))
/* ...and host identifier bits are all ones? =>... */
&& ((addr & ~ip4_addr_get_u32(netif_ip4_netmask(netif))) ==
(IPADDR_BROADCAST & ~ip4_addr_get_u32(netif_ip4_netmask(netif))))) {
/* => network broadcast address */
return 1;
} else {
return 0;
}
}
/** Checks if a netmask is valid (starting with ones, then only zeros)
*
* @param netmask the IPv4 netmask to check (in network byte order!)
* @return 1 if the netmask is valid, 0 if it is not
*/
u8_t
ip4_addr_netmask_valid(u32_t netmask)
{
u32_t mask;
u32_t nm_hostorder = lwip_htonl(netmask);
/* first, check for the first zero */
for (mask = 1UL << 31 ; mask != 0; mask >>= 1) {
if ((nm_hostorder & mask) == 0) {
break;
}
}
/* then check that there is no one */
for (; mask != 0; mask >>= 1) {
if ((nm_hostorder & mask) != 0) {
/* there is a one after the first zero -> invalid */
return 0;
}
}
/* no one after the first zero -> valid */
return 1;
}
/**
* Ascii internet address interpretation routine.
* The value returned is in network order.
*
* @param cp IP address in ascii representation (e.g. "127.0.0.1")
* @return ip address in network order
*/
u32_t
ipaddr_addr(const char *cp)
{
ip4_addr_t val;
if (ip4addr_aton(cp, &val)) {
return ip4_addr_get_u32(&val);
}
return (IPADDR_NONE);
}
/**
* Check whether "cp" is a valid ascii representation
* of an Internet address and convert to a binary address.
* Returns 1 if the address is valid, 0 if not.
* This replaces inet_addr, the return value from which
* cannot distinguish between failure and a local broadcast address.
*
* @param cp IP address in ascii representation (e.g. "127.0.0.1")
* @param addr pointer to which to save the ip address in network order
* @return 1 if cp could be converted to addr, 0 on failure
*/
int
ip4addr_aton(const char *cp, ip4_addr_t *addr)
{
u32_t val;
u8_t base;
char c;
u32_t parts[4];
u32_t *pp = parts;
c = *cp;
for (;;) {
/*
* Collect number up to ``.''.
* Values are specified as for C:
* 0x=hex, 0=octal, 1-9=decimal.
*/
if (!lwip_isdigit(c)) {
return 0;
}
val = 0;
base = 10;
if (c == '0') {
c = *++cp;
if (c == 'x' || c == 'X') {
base = 16;
c = *++cp;
} else {
base = 8;
}
}
for (;;) {
if (lwip_isdigit(c)) {
val = (val * base) + (u32_t)(c - '0');
c = *++cp;
} else if (base == 16 && lwip_isxdigit(c)) {
val = (val << 4) | (u32_t)(c + 10 - (lwip_islower(c) ? 'a' : 'A'));
c = *++cp;
} else {
break;
}
}
if (c == '.') {
/*
* Internet format:
* a.b.c.d
* a.b.c (with c treated as 16 bits)
* a.b (with b treated as 24 bits)
*/
if (pp >= parts + 3) {
return 0;
}
*pp++ = val;
c = *++cp;
} else {
break;
}
}
/*
* Check for trailing characters.
*/
if (c != '\0' && !lwip_isspace(c)) {
return 0;
}
/*
* Concoct the address according to
* the number of parts specified.
*/
switch (pp - parts + 1) {
case 0:
return 0; /* initial nondigit */
case 1: /* a -- 32 bits */
break;
case 2: /* a.b -- 8.24 bits */
if (val > 0xffffffUL) {
return 0;
}
if (parts[0] > 0xff) {
return 0;
}
val |= parts[0] << 24;
break;
case 3: /* a.b.c -- 8.8.16 bits */
if (val > 0xffff) {
return 0;
}
if ((parts[0] > 0xff) || (parts[1] > 0xff)) {
return 0;
}
val |= (parts[0] << 24) | (parts[1] << 16);
break;
case 4: /* a.b.c.d -- 8.8.8.8 bits */
if (val > 0xff) {
return 0;
}
if ((parts[0] > 0xff) || (parts[1] > 0xff) || (parts[2] > 0xff)) {
return 0;
}
val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
break;
default:
LWIP_ASSERT("unhandled", 0);
break;
}
if (addr) {
ip4_addr_set_u32(addr, lwip_htonl(val));
}
return 1;
}
/**
* Convert numeric IP address into decimal dotted ASCII representation.
* returns ptr to static buffer; not reentrant!
*
* @param addr ip address in network order to convert
* @return pointer to a global static (!) buffer that holds the ASCII
* representation of addr
*/
char *
ip4addr_ntoa(const ip4_addr_t *addr)
{
static char str[IP4ADDR_STRLEN_MAX];
return ip4addr_ntoa_r(addr, str, IP4ADDR_STRLEN_MAX);
}
/**
* Same as ip4addr_ntoa, but reentrant since a user-supplied buffer is used.
*
* @param addr ip address in network order to convert
* @param buf target buffer where the string is stored
* @param buflen length of buf
* @return either pointer to buf which now holds the ASCII
* representation of addr or NULL if buf was too small
*/
char *
ip4addr_ntoa_r(const ip4_addr_t *addr, char *buf, int buflen)
{
u32_t s_addr;
char inv[3];
char *rp;
u8_t *ap;
u8_t rem;
u8_t n;
u8_t i;
int len = 0;
s_addr = ip4_addr_get_u32(addr);
rp = buf;
ap = (u8_t *)&s_addr;
for (n = 0; n < 4; n++) {
i = 0;
do {
rem = *ap % (u8_t)10;
*ap /= (u8_t)10;
inv[i++] = (char)('0' + rem);
} while (*ap);
while (i--) {
if (len++ >= buflen) {
return NULL;
}
*rp++ = inv[i];
}
if (len++ >= buflen) {
return NULL;
}
*rp++ = '.';
ap++;
}
*--rp = 0;
return buf;
}
#endif /* LWIP_IPV4 */

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core/ipv4/ip4_frag.c Executable file
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/**
* @file
* This is the IPv4 packet segmentation and reassembly implementation.
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Jani Monoses <jani@iv.ro>
* Simon Goldschmidt
* original reassembly code by Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#if LWIP_IPV4
#include "lwip/ip4_frag.h"
#include "lwip/def.h"
#include "lwip/inet_chksum.h"
#include "lwip/netif.h"
#include "lwip/stats.h"
#include "lwip/icmp.h"
#include <string.h>
#if IP_REASSEMBLY
/**
* The IP reassembly code currently has the following limitations:
* - IP header options are not supported
* - fragments must not overlap (e.g. due to different routes),
* currently, overlapping or duplicate fragments are thrown away
* if IP_REASS_CHECK_OVERLAP=1 (the default)!
*
* @todo: work with IP header options
*/
/** Setting this to 0, you can turn off checking the fragments for overlapping
* regions. The code gets a little smaller. Only use this if you know that
* overlapping won't occur on your network! */
#ifndef IP_REASS_CHECK_OVERLAP
#define IP_REASS_CHECK_OVERLAP 1
#endif /* IP_REASS_CHECK_OVERLAP */
/** Set to 0 to prevent freeing the oldest datagram when the reassembly buffer is
* full (IP_REASS_MAX_PBUFS pbufs are enqueued). The code gets a little smaller.
* Datagrams will be freed by timeout only. Especially useful when MEMP_NUM_REASSDATA
* is set to 1, so one datagram can be reassembled at a time, only. */
#ifndef IP_REASS_FREE_OLDEST
#define IP_REASS_FREE_OLDEST 1
#endif /* IP_REASS_FREE_OLDEST */
#define IP_REASS_FLAG_LASTFRAG 0x01
#define IP_REASS_VALIDATE_TELEGRAM_FINISHED 1
#define IP_REASS_VALIDATE_PBUF_QUEUED 0
#define IP_REASS_VALIDATE_PBUF_DROPPED -1
/** This is a helper struct which holds the starting
* offset and the ending offset of this fragment to
* easily chain the fragments.
* It has the same packing requirements as the IP header, since it replaces
* the IP header in memory in incoming fragments (after copying it) to keep
* track of the various fragments. (-> If the IP header doesn't need packing,
* this struct doesn't need packing, too.)
*/
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct ip_reass_helper {
PACK_STRUCT_FIELD(struct pbuf *next_pbuf);
PACK_STRUCT_FIELD(u16_t start);
PACK_STRUCT_FIELD(u16_t end);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
#define IP_ADDRESSES_AND_ID_MATCH(iphdrA, iphdrB) \
(ip4_addr_cmp(&(iphdrA)->src, &(iphdrB)->src) && \
ip4_addr_cmp(&(iphdrA)->dest, &(iphdrB)->dest) && \
IPH_ID(iphdrA) == IPH_ID(iphdrB)) ? 1 : 0
/* global variables */
static struct ip_reassdata *reassdatagrams;
static u16_t ip_reass_pbufcount;
/* function prototypes */
static void ip_reass_dequeue_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev);
static int ip_reass_free_complete_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev);
/**
* Reassembly timer base function
* for both NO_SYS == 0 and 1 (!).
*
* Should be called every 1000 msec (defined by IP_TMR_INTERVAL).
*/
void
ip_reass_tmr(void)
{
struct ip_reassdata *r, *prev = NULL;
r = reassdatagrams;
while (r != NULL) {
/* Decrement the timer. Once it reaches 0,
* clean up the incomplete fragment assembly */
if (r->timer > 0) {
r->timer--;
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer dec %"U16_F"\n", (u16_t)r->timer));
prev = r;
r = r->next;
} else {
/* reassembly timed out */
struct ip_reassdata *tmp;
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer timed out\n"));
tmp = r;
/* get the next pointer before freeing */
r = r->next;
/* free the helper struct and all enqueued pbufs */
ip_reass_free_complete_datagram(tmp, prev);
}
}
}
/**
* Free a datagram (struct ip_reassdata) and all its pbufs.
* Updates the total count of enqueued pbufs (ip_reass_pbufcount),
* SNMP counters and sends an ICMP time exceeded packet.
*
* @param ipr datagram to free
* @param prev the previous datagram in the linked list
* @return the number of pbufs freed
*/
static int
ip_reass_free_complete_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev)
{
u16_t pbufs_freed = 0;
u16_t clen;
struct pbuf *p;
struct ip_reass_helper *iprh;
LWIP_ASSERT("prev != ipr", prev != ipr);
if (prev != NULL) {
LWIP_ASSERT("prev->next == ipr", prev->next == ipr);
}
MIB2_STATS_INC(mib2.ipreasmfails);
#if LWIP_ICMP
iprh = (struct ip_reass_helper *)ipr->p->payload;
if (iprh->start == 0) {
/* The first fragment was received, send ICMP time exceeded. */
/* First, de-queue the first pbuf from r->p. */
p = ipr->p;
ipr->p = iprh->next_pbuf;
/* Then, copy the original header into it. */
SMEMCPY(p->payload, &ipr->iphdr, IP_HLEN);
icmp_time_exceeded(p, ICMP_TE_FRAG);
clen = pbuf_clen(p);
LWIP_ASSERT("pbufs_freed + clen <= 0xffff", pbufs_freed + clen <= 0xffff);
pbufs_freed = (u16_t)(pbufs_freed + clen);
pbuf_free(p);
}
#endif /* LWIP_ICMP */
/* First, free all received pbufs. The individual pbufs need to be released
separately as they have not yet been chained */
p = ipr->p;
while (p != NULL) {
struct pbuf *pcur;
iprh = (struct ip_reass_helper *)p->payload;
pcur = p;
/* get the next pointer before freeing */
p = iprh->next_pbuf;
clen = pbuf_clen(pcur);
LWIP_ASSERT("pbufs_freed + clen <= 0xffff", pbufs_freed + clen <= 0xffff);
pbufs_freed = (u16_t)(pbufs_freed + clen);
pbuf_free(pcur);
}
/* Then, unchain the struct ip_reassdata from the list and free it. */
ip_reass_dequeue_datagram(ipr, prev);
LWIP_ASSERT("ip_reass_pbufcount >= pbufs_freed", ip_reass_pbufcount >= pbufs_freed);
ip_reass_pbufcount = (u16_t)(ip_reass_pbufcount - pbufs_freed);
return pbufs_freed;
}
#if IP_REASS_FREE_OLDEST
/**
* Free the oldest datagram to make room for enqueueing new fragments.
* The datagram 'fraghdr' belongs to is not freed!
*
* @param fraghdr IP header of the current fragment
* @param pbufs_needed number of pbufs needed to enqueue
* (used for freeing other datagrams if not enough space)
* @return the number of pbufs freed
*/
static int
ip_reass_remove_oldest_datagram(struct ip_hdr *fraghdr, int pbufs_needed)
{
/* @todo Can't we simply remove the last datagram in the
* linked list behind reassdatagrams?
*/
struct ip_reassdata *r, *oldest, *prev, *oldest_prev;
int pbufs_freed = 0, pbufs_freed_current;
int other_datagrams;
/* Free datagrams until being allowed to enqueue 'pbufs_needed' pbufs,
* but don't free the datagram that 'fraghdr' belongs to! */
do {
oldest = NULL;
prev = NULL;
oldest_prev = NULL;
other_datagrams = 0;
r = reassdatagrams;
while (r != NULL) {
if (!IP_ADDRESSES_AND_ID_MATCH(&r->iphdr, fraghdr)) {
/* Not the same datagram as fraghdr */
other_datagrams++;
if (oldest == NULL) {
oldest = r;
oldest_prev = prev;
} else if (r->timer <= oldest->timer) {
/* older than the previous oldest */
oldest = r;
oldest_prev = prev;
}
}
if (r->next != NULL) {
prev = r;
}
r = r->next;
}
if (oldest != NULL) {
pbufs_freed_current = ip_reass_free_complete_datagram(oldest, oldest_prev);
pbufs_freed += pbufs_freed_current;
}
} while ((pbufs_freed < pbufs_needed) && (other_datagrams > 1));
return pbufs_freed;
}
#endif /* IP_REASS_FREE_OLDEST */
/**
* Enqueues a new fragment into the fragment queue
* @param fraghdr points to the new fragments IP hdr
* @param clen number of pbufs needed to enqueue (used for freeing other datagrams if not enough space)
* @return A pointer to the queue location into which the fragment was enqueued
*/
static struct ip_reassdata *
ip_reass_enqueue_new_datagram(struct ip_hdr *fraghdr, int clen)
{
struct ip_reassdata *ipr;
#if ! IP_REASS_FREE_OLDEST
LWIP_UNUSED_ARG(clen);
#endif
/* No matching previous fragment found, allocate a new reassdata struct */
ipr = (struct ip_reassdata *)memp_malloc(MEMP_REASSDATA);
if (ipr == NULL) {
#if IP_REASS_FREE_OLDEST
if (ip_reass_remove_oldest_datagram(fraghdr, clen) >= clen) {
ipr = (struct ip_reassdata *)memp_malloc(MEMP_REASSDATA);
}
if (ipr == NULL)
#endif /* IP_REASS_FREE_OLDEST */
{
IPFRAG_STATS_INC(ip_frag.memerr);
LWIP_DEBUGF(IP_REASS_DEBUG, ("Failed to alloc reassdata struct\n"));
return NULL;
}
}
memset(ipr, 0, sizeof(struct ip_reassdata));
ipr->timer = IP_REASS_MAXAGE;
/* enqueue the new structure to the front of the list */
ipr->next = reassdatagrams;
reassdatagrams = ipr;
/* copy the ip header for later tests and input */
/* @todo: no ip options supported? */
SMEMCPY(&(ipr->iphdr), fraghdr, IP_HLEN);
return ipr;
}
/**
* Dequeues a datagram from the datagram queue. Doesn't deallocate the pbufs.
* @param ipr points to the queue entry to dequeue
*/
static void
ip_reass_dequeue_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev)
{
/* dequeue the reass struct */
if (reassdatagrams == ipr) {
/* it was the first in the list */
reassdatagrams = ipr->next;
} else {
/* it wasn't the first, so it must have a valid 'prev' */
LWIP_ASSERT("sanity check linked list", prev != NULL);
prev->next = ipr->next;
}
/* now we can free the ip_reassdata struct */
memp_free(MEMP_REASSDATA, ipr);
}
/**
* Chain a new pbuf into the pbuf list that composes the datagram. The pbuf list
* will grow over time as new pbufs are rx.
* Also checks that the datagram passes basic continuity checks (if the last
* fragment was received at least once).
* @param ipr points to the reassembly state
* @param new_p points to the pbuf for the current fragment
* @param is_last is 1 if this pbuf has MF==0 (ipr->flags not updated yet)
* @return see IP_REASS_VALIDATE_* defines
*/
static int
ip_reass_chain_frag_into_datagram_and_validate(struct ip_reassdata *ipr, struct pbuf *new_p, int is_last)
{
struct ip_reass_helper *iprh, *iprh_tmp, *iprh_prev = NULL;
struct pbuf *q;
u16_t offset, len;
u8_t hlen;
struct ip_hdr *fraghdr;
int valid = 1;
/* Extract length and fragment offset from current fragment */
fraghdr = (struct ip_hdr *)new_p->payload;
len = lwip_ntohs(IPH_LEN(fraghdr));
hlen = IPH_HL_BYTES(fraghdr);
if (hlen > len) {
/* invalid datagram */
return IP_REASS_VALIDATE_PBUF_DROPPED;
}
len = (u16_t)(len - hlen);
offset = IPH_OFFSET_BYTES(fraghdr);
/* overwrite the fragment's ip header from the pbuf with our helper struct,
* and setup the embedded helper structure. */
/* make sure the struct ip_reass_helper fits into the IP header */
LWIP_ASSERT("sizeof(struct ip_reass_helper) <= IP_HLEN",
sizeof(struct ip_reass_helper) <= IP_HLEN);
iprh = (struct ip_reass_helper *)new_p->payload;
iprh->next_pbuf = NULL;
iprh->start = offset;
iprh->end = (u16_t)(offset + len);
if (iprh->end < offset) {
/* u16_t overflow, cannot handle this */
return IP_REASS_VALIDATE_PBUF_DROPPED;
}
/* Iterate through until we either get to the end of the list (append),
* or we find one with a larger offset (insert). */
for (q = ipr->p; q != NULL;) {
iprh_tmp = (struct ip_reass_helper *)q->payload;
if (iprh->start < iprh_tmp->start) {
/* the new pbuf should be inserted before this */
iprh->next_pbuf = q;
if (iprh_prev != NULL) {
/* not the fragment with the lowest offset */
#if IP_REASS_CHECK_OVERLAP
if ((iprh->start < iprh_prev->end) || (iprh->end > iprh_tmp->start)) {
/* fragment overlaps with previous or following, throw away */
return IP_REASS_VALIDATE_PBUF_DROPPED;
}
#endif /* IP_REASS_CHECK_OVERLAP */
iprh_prev->next_pbuf = new_p;
if (iprh_prev->end != iprh->start) {
/* There is a fragment missing between the current
* and the previous fragment */
valid = 0;
}
} else {
#if IP_REASS_CHECK_OVERLAP
if (iprh->end > iprh_tmp->start) {
/* fragment overlaps with following, throw away */
return IP_REASS_VALIDATE_PBUF_DROPPED;
}
#endif /* IP_REASS_CHECK_OVERLAP */
/* fragment with the lowest offset */
ipr->p = new_p;
}
break;
} else if (iprh->start == iprh_tmp->start) {
/* received the same datagram twice: no need to keep the datagram */
return IP_REASS_VALIDATE_PBUF_DROPPED;
#if IP_REASS_CHECK_OVERLAP
} else if (iprh->start < iprh_tmp->end) {
/* overlap: no need to keep the new datagram */
return IP_REASS_VALIDATE_PBUF_DROPPED;
#endif /* IP_REASS_CHECK_OVERLAP */
} else {
/* Check if the fragments received so far have no holes. */
if (iprh_prev != NULL) {
if (iprh_prev->end != iprh_tmp->start) {
/* There is a fragment missing between the current
* and the previous fragment */
valid = 0;
}
}
}
q = iprh_tmp->next_pbuf;
iprh_prev = iprh_tmp;
}
/* If q is NULL, then we made it to the end of the list. Determine what to do now */
if (q == NULL) {
if (iprh_prev != NULL) {
/* this is (for now), the fragment with the highest offset:
* chain it to the last fragment */
#if IP_REASS_CHECK_OVERLAP
LWIP_ASSERT("check fragments don't overlap", iprh_prev->end <= iprh->start);
#endif /* IP_REASS_CHECK_OVERLAP */
iprh_prev->next_pbuf = new_p;
if (iprh_prev->end != iprh->start) {
valid = 0;
}
} else {
#if IP_REASS_CHECK_OVERLAP
LWIP_ASSERT("no previous fragment, this must be the first fragment!",
ipr->p == NULL);
#endif /* IP_REASS_CHECK_OVERLAP */
/* this is the first fragment we ever received for this ip datagram */
ipr->p = new_p;
}
}
/* At this point, the validation part begins: */
/* If we already received the last fragment */
if (is_last || ((ipr->flags & IP_REASS_FLAG_LASTFRAG) != 0)) {
/* and had no holes so far */
if (valid) {
/* then check if the rest of the fragments is here */
/* Check if the queue starts with the first datagram */
if ((ipr->p == NULL) || (((struct ip_reass_helper *)ipr->p->payload)->start != 0)) {
valid = 0;
} else {
/* and check that there are no holes after this datagram */
iprh_prev = iprh;
q = iprh->next_pbuf;
while (q != NULL) {
iprh = (struct ip_reass_helper *)q->payload;
if (iprh_prev->end != iprh->start) {
valid = 0;
break;
}
iprh_prev = iprh;
q = iprh->next_pbuf;
}
/* if still valid, all fragments are received
* (because to the MF==0 already arrived */
if (valid) {
LWIP_ASSERT("sanity check", ipr->p != NULL);
LWIP_ASSERT("sanity check",
((struct ip_reass_helper *)ipr->p->payload) != iprh);
LWIP_ASSERT("validate_datagram:next_pbuf!=NULL",
iprh->next_pbuf == NULL);
}
}
}
/* If valid is 0 here, there are some fragments missing in the middle
* (since MF == 0 has already arrived). Such datagrams simply time out if
* no more fragments are received... */
return valid ? IP_REASS_VALIDATE_TELEGRAM_FINISHED : IP_REASS_VALIDATE_PBUF_QUEUED;
}
/* If we come here, not all fragments were received, yet! */
return IP_REASS_VALIDATE_PBUF_QUEUED; /* not yet valid! */
}
/**
* Reassembles incoming IP fragments into an IP datagram.
*
* @param p points to a pbuf chain of the fragment
* @return NULL if reassembly is incomplete, ? otherwise
*/
struct pbuf *
ip4_reass(struct pbuf *p)
{
struct pbuf *r;
struct ip_hdr *fraghdr;
struct ip_reassdata *ipr;
struct ip_reass_helper *iprh;
u16_t offset, len, clen;
u8_t hlen;
int valid;
int is_last;
IPFRAG_STATS_INC(ip_frag.recv);
MIB2_STATS_INC(mib2.ipreasmreqds);
fraghdr = (struct ip_hdr *)p->payload;
if (IPH_HL_BYTES(fraghdr) != IP_HLEN) {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip4_reass: IP options currently not supported!\n"));
IPFRAG_STATS_INC(ip_frag.err);
goto nullreturn;
}
offset = IPH_OFFSET_BYTES(fraghdr);
len = lwip_ntohs(IPH_LEN(fraghdr));
hlen = IPH_HL_BYTES(fraghdr);
if (hlen > len) {
/* invalid datagram */
goto nullreturn;
}
len = (u16_t)(len - hlen);
/* Check if we are allowed to enqueue more datagrams. */
clen = pbuf_clen(p);
if ((ip_reass_pbufcount + clen) > IP_REASS_MAX_PBUFS) {
#if IP_REASS_FREE_OLDEST
if (!ip_reass_remove_oldest_datagram(fraghdr, clen) ||
((ip_reass_pbufcount + clen) > IP_REASS_MAX_PBUFS))
#endif /* IP_REASS_FREE_OLDEST */
{
/* No datagram could be freed and still too many pbufs enqueued */
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip4_reass: Overflow condition: pbufct=%d, clen=%d, MAX=%d\n",
ip_reass_pbufcount, clen, IP_REASS_MAX_PBUFS));
IPFRAG_STATS_INC(ip_frag.memerr);
/* @todo: send ICMP time exceeded here? */
/* drop this pbuf */
goto nullreturn;
}
}
/* Look for the datagram the fragment belongs to in the current datagram queue,
* remembering the previous in the queue for later dequeueing. */
for (ipr = reassdatagrams; ipr != NULL; ipr = ipr->next) {
/* Check if the incoming fragment matches the one currently present
in the reassembly buffer. If so, we proceed with copying the
fragment into the buffer. */
if (IP_ADDRESSES_AND_ID_MATCH(&ipr->iphdr, fraghdr)) {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip4_reass: matching previous fragment ID=%"X16_F"\n",
lwip_ntohs(IPH_ID(fraghdr))));
IPFRAG_STATS_INC(ip_frag.cachehit);
break;
}
}
if (ipr == NULL) {
/* Enqueue a new datagram into the datagram queue */
ipr = ip_reass_enqueue_new_datagram(fraghdr, clen);
/* Bail if unable to enqueue */
if (ipr == NULL) {
goto nullreturn;
}
} else {
if (((lwip_ntohs(IPH_OFFSET(fraghdr)) & IP_OFFMASK) == 0) &&
((lwip_ntohs(IPH_OFFSET(&ipr->iphdr)) & IP_OFFMASK) != 0)) {
/* ipr->iphdr is not the header from the first fragment, but fraghdr is
* -> copy fraghdr into ipr->iphdr since we want to have the header
* of the first fragment (for ICMP time exceeded and later, for copying
* all options, if supported)*/
SMEMCPY(&ipr->iphdr, fraghdr, IP_HLEN);
}
}
/* At this point, we have either created a new entry or pointing
* to an existing one */
/* check for 'no more fragments', and update queue entry*/
is_last = (IPH_OFFSET(fraghdr) & PP_NTOHS(IP_MF)) == 0;
if (is_last) {
u16_t datagram_len = (u16_t)(offset + len);
if ((datagram_len < offset) || (datagram_len > (0xFFFF - IP_HLEN))) {
/* u16_t overflow, cannot handle this */
goto nullreturn_ipr;
}
}
/* find the right place to insert this pbuf */
/* @todo: trim pbufs if fragments are overlapping */
valid = ip_reass_chain_frag_into_datagram_and_validate(ipr, p, is_last);
if (valid == IP_REASS_VALIDATE_PBUF_DROPPED) {
goto nullreturn_ipr;
}
/* if we come here, the pbuf has been enqueued */
/* Track the current number of pbufs current 'in-flight', in order to limit
the number of fragments that may be enqueued at any one time
(overflow checked by testing against IP_REASS_MAX_PBUFS) */
ip_reass_pbufcount = (u16_t)(ip_reass_pbufcount + clen);
if (is_last) {
u16_t datagram_len = (u16_t)(offset + len);
ipr->datagram_len = datagram_len;
ipr->flags |= IP_REASS_FLAG_LASTFRAG;
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip4_reass: last fragment seen, total len %"S16_F"\n",
ipr->datagram_len));
}
if (valid == IP_REASS_VALIDATE_TELEGRAM_FINISHED) {
struct ip_reassdata *ipr_prev;
/* the totally last fragment (flag more fragments = 0) was received at least
* once AND all fragments are received */
u16_t datagram_len = (u16_t)(ipr->datagram_len + IP_HLEN);
/* save the second pbuf before copying the header over the pointer */
r = ((struct ip_reass_helper *)ipr->p->payload)->next_pbuf;
/* copy the original ip header back to the first pbuf */
fraghdr = (struct ip_hdr *)(ipr->p->payload);
SMEMCPY(fraghdr, &ipr->iphdr, IP_HLEN);
IPH_LEN_SET(fraghdr, lwip_htons(datagram_len));
IPH_OFFSET_SET(fraghdr, 0);
IPH_CHKSUM_SET(fraghdr, 0);
/* @todo: do we need to set/calculate the correct checksum? */
#if CHECKSUM_GEN_IP
IF__NETIF_CHECKSUM_ENABLED(ip_current_input_netif(), NETIF_CHECKSUM_GEN_IP) {
IPH_CHKSUM_SET(fraghdr, inet_chksum(fraghdr, IP_HLEN));
}
#endif /* CHECKSUM_GEN_IP */
p = ipr->p;
/* chain together the pbufs contained within the reass_data list. */
while (r != NULL) {
iprh = (struct ip_reass_helper *)r->payload;
/* hide the ip header for every succeeding fragment */
pbuf_remove_header(r, IP_HLEN);
pbuf_cat(p, r);
r = iprh->next_pbuf;
}
/* find the previous entry in the linked list */
if (ipr == reassdatagrams) {
ipr_prev = NULL;
} else {
for (ipr_prev = reassdatagrams; ipr_prev != NULL; ipr_prev = ipr_prev->next) {
if (ipr_prev->next == ipr) {
break;
}
}
}
/* release the sources allocate for the fragment queue entry */
ip_reass_dequeue_datagram(ipr, ipr_prev);
/* and adjust the number of pbufs currently queued for reassembly. */
clen = pbuf_clen(p);
LWIP_ASSERT("ip_reass_pbufcount >= clen", ip_reass_pbufcount >= clen);
ip_reass_pbufcount = (u16_t)(ip_reass_pbufcount - clen);
MIB2_STATS_INC(mib2.ipreasmoks);
/* Return the pbuf chain */
return p;
}
/* the datagram is not (yet?) reassembled completely */
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_pbufcount: %d out\n", ip_reass_pbufcount));
return NULL;
nullreturn_ipr:
LWIP_ASSERT("ipr != NULL", ipr != NULL);
if (ipr->p == NULL) {
/* dropped pbuf after creating a new datagram entry: remove the entry, too */
LWIP_ASSERT("not firstalthough just enqueued", ipr == reassdatagrams);
ip_reass_dequeue_datagram(ipr, NULL);
}
nullreturn:
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip4_reass: nullreturn\n"));
IPFRAG_STATS_INC(ip_frag.drop);
pbuf_free(p);
return NULL;
}
#endif /* IP_REASSEMBLY */
#if IP_FRAG
#if !LWIP_NETIF_TX_SINGLE_PBUF
/** Allocate a new struct pbuf_custom_ref */
static struct pbuf_custom_ref *
ip_frag_alloc_pbuf_custom_ref(void)
{
return (struct pbuf_custom_ref *)memp_malloc(MEMP_FRAG_PBUF);
}
/** Free a struct pbuf_custom_ref */
static void
ip_frag_free_pbuf_custom_ref(struct pbuf_custom_ref *p)
{
LWIP_ASSERT("p != NULL", p != NULL);
memp_free(MEMP_FRAG_PBUF, p);
}
/** Free-callback function to free a 'struct pbuf_custom_ref', called by
* pbuf_free. */
static void
ipfrag_free_pbuf_custom(struct pbuf *p)
{
struct pbuf_custom_ref *pcr = (struct pbuf_custom_ref *)p;
LWIP_ASSERT("pcr != NULL", pcr != NULL);
LWIP_ASSERT("pcr == p", (void *)pcr == (void *)p);
if (pcr->original != NULL) {
pbuf_free(pcr->original);
}
ip_frag_free_pbuf_custom_ref(pcr);
}
#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */
/**
* Fragment an IP datagram if too large for the netif.
*
* Chop the datagram in MTU sized chunks and send them in order
* by pointing PBUF_REFs into p.
*
* @param p ip packet to send
* @param netif the netif on which to send
* @param dest destination ip address to which to send
*
* @return ERR_OK if sent successfully, err_t otherwise
*/
err_t
ip4_frag(struct pbuf *p, struct netif *netif, const ip4_addr_t *dest)
{
struct pbuf *rambuf;
#if !LWIP_NETIF_TX_SINGLE_PBUF
struct pbuf *newpbuf;
u16_t newpbuflen = 0;
u16_t left_to_copy;
#endif
struct ip_hdr *original_iphdr;
struct ip_hdr *iphdr;
const u16_t nfb = (u16_t)((netif->mtu - IP_HLEN) / 8);
u16_t left, fragsize;
u16_t ofo;
int last;
u16_t poff = IP_HLEN;
u16_t tmp;
int mf_set;
original_iphdr = (struct ip_hdr *)p->payload;
iphdr = original_iphdr;
if (IPH_HL_BYTES(iphdr) != IP_HLEN) {
/* ip4_frag() does not support IP options */
return ERR_VAL;
}
LWIP_ERROR("ip4_frag(): pbuf too short", p->len >= IP_HLEN, return ERR_VAL);
/* Save original offset */
tmp = lwip_ntohs(IPH_OFFSET(iphdr));
ofo = tmp & IP_OFFMASK;
/* already fragmented? if so, the last fragment we create must have MF, too */
mf_set = tmp & IP_MF;
left = (u16_t)(p->tot_len - IP_HLEN);
while (left) {
/* Fill this fragment */
fragsize = LWIP_MIN(left, (u16_t)(nfb * 8));
#if LWIP_NETIF_TX_SINGLE_PBUF
rambuf = pbuf_alloc(PBUF_IP, fragsize, PBUF_RAM);
if (rambuf == NULL) {
goto memerr;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(rambuf->len == rambuf->tot_len) && (rambuf->next == NULL));
poff += pbuf_copy_partial(p, rambuf->payload, fragsize, poff);
/* make room for the IP header */
if (pbuf_add_header(rambuf, IP_HLEN)) {
pbuf_free(rambuf);
goto memerr;
}
/* fill in the IP header */
SMEMCPY(rambuf->payload, original_iphdr, IP_HLEN);
iphdr = (struct ip_hdr *)rambuf->payload;
#else /* LWIP_NETIF_TX_SINGLE_PBUF */
/* When not using a static buffer, create a chain of pbufs.
* The first will be a PBUF_RAM holding the link and IP header.
* The rest will be PBUF_REFs mirroring the pbuf chain to be fragged,
* but limited to the size of an mtu.
*/
rambuf = pbuf_alloc(PBUF_LINK, IP_HLEN, PBUF_RAM);
if (rambuf == NULL) {
goto memerr;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(rambuf->len >= (IP_HLEN)));
SMEMCPY(rambuf->payload, original_iphdr, IP_HLEN);
iphdr = (struct ip_hdr *)rambuf->payload;
left_to_copy = fragsize;
while (left_to_copy) {
struct pbuf_custom_ref *pcr;
u16_t plen = (u16_t)(p->len - poff);
LWIP_ASSERT("p->len >= poff", p->len >= poff);
newpbuflen = LWIP_MIN(left_to_copy, plen);
/* Is this pbuf already empty? */
if (!newpbuflen) {
poff = 0;
p = p->next;
continue;
}
pcr = ip_frag_alloc_pbuf_custom_ref();
if (pcr == NULL) {
pbuf_free(rambuf);
goto memerr;
}
/* Mirror this pbuf, although we might not need all of it. */
newpbuf = pbuf_alloced_custom(PBUF_RAW, newpbuflen, PBUF_REF, &pcr->pc,
(u8_t *)p->payload + poff, newpbuflen);
if (newpbuf == NULL) {
ip_frag_free_pbuf_custom_ref(pcr);
pbuf_free(rambuf);
goto memerr;
}
pbuf_ref(p);
pcr->original = p;
pcr->pc.custom_free_function = ipfrag_free_pbuf_custom;
/* Add it to end of rambuf's chain, but using pbuf_cat, not pbuf_chain
* so that it is removed when pbuf_dechain is later called on rambuf.
*/
pbuf_cat(rambuf, newpbuf);
left_to_copy = (u16_t)(left_to_copy - newpbuflen);
if (left_to_copy) {
poff = 0;
p = p->next;
}
}
poff = (u16_t)(poff + newpbuflen);
#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
/* Correct header */
last = (left <= netif->mtu - IP_HLEN);
/* Set new offset and MF flag */
tmp = (IP_OFFMASK & (ofo));
if (!last || mf_set) {
/* the last fragment has MF set if the input frame had it */
tmp = tmp | IP_MF;
}
IPH_OFFSET_SET(iphdr, lwip_htons(tmp));
IPH_LEN_SET(iphdr, lwip_htons((u16_t)(fragsize + IP_HLEN)));
IPH_CHKSUM_SET(iphdr, 0);
#if CHECKSUM_GEN_IP
IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_IP) {
IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
}
#endif /* CHECKSUM_GEN_IP */
/* No need for separate header pbuf - we allowed room for it in rambuf
* when allocated.
*/
netif->output(netif, rambuf, dest);
IPFRAG_STATS_INC(ip_frag.xmit);
/* Unfortunately we can't reuse rambuf - the hardware may still be
* using the buffer. Instead we free it (and the ensuing chain) and
* recreate it next time round the loop. If we're lucky the hardware
* will have already sent the packet, the free will really free, and
* there will be zero memory penalty.
*/
pbuf_free(rambuf);
left = (u16_t)(left - fragsize);
ofo = (u16_t)(ofo + nfb);
}
MIB2_STATS_INC(mib2.ipfragoks);
return ERR_OK;
memerr:
MIB2_STATS_INC(mib2.ipfragfails);
return ERR_MEM;
}
#endif /* IP_FRAG */
#endif /* LWIP_IPV4 */

812
core/ipv6/dhcp6.c Executable file
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@ -0,0 +1,812 @@
/**
* @file
*
* @defgroup dhcp6 DHCPv6
* @ingroup ip6
* DHCPv6 client: IPv6 address autoconfiguration as per
* RFC 3315 (stateful DHCPv6) and
* RFC 3736 (stateless DHCPv6).
*
* For now, only stateless DHCPv6 is implemented!
*
* TODO:
* - enable/disable API to not always start when RA is received
* - stateful DHCPv6 (for now, only stateless DHCPv6 for DNS and NTP servers works)
* - create Client Identifier?
* - only start requests if a valid local address is available on the netif
* - only start information requests if required (not for every RA)
*
* dhcp6_enable_stateful() enables stateful DHCPv6 for a netif (stateless disabled)\n
* dhcp6_enable_stateless() enables stateless DHCPv6 for a netif (stateful disabled)\n
* dhcp6_disable() disable DHCPv6 for a netif
*
* When enabled, requests are only issued after receipt of RA with the
* corresponding bits set.
*/
/*
* Copyright (c) 2018 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*/
#include "lwip/opt.h"
#if LWIP_IPV6 && LWIP_IPV6_DHCP6 /* don't build if not configured for use in lwipopts.h */
#include "lwip/dhcp6.h"
#include "lwip/prot/dhcp6.h"
#include "lwip/def.h"
#include "lwip/udp.h"
#include "lwip/dns.h"
#include <string.h>
#ifdef LWIP_HOOK_FILENAME
#include LWIP_HOOK_FILENAME
#endif
#ifndef LWIP_HOOK_DHCP6_APPEND_OPTIONS
#define LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, state, msg, msg_type, options_len_ptr, max_len)
#endif
#ifndef LWIP_HOOK_DHCP6_PARSE_OPTION
#define LWIP_HOOK_DHCP6_PARSE_OPTION(netif, dhcp6, state, msg, msg_type, option, len, pbuf, offset) do { LWIP_UNUSED_ARG(msg); } while(0)
#endif
#if LWIP_DNS && LWIP_DHCP6_MAX_DNS_SERVERS
#if DNS_MAX_SERVERS > LWIP_DHCP6_MAX_DNS_SERVERS
#define LWIP_DHCP6_PROVIDE_DNS_SERVERS LWIP_DHCP6_MAX_DNS_SERVERS
#else
#define LWIP_DHCP6_PROVIDE_DNS_SERVERS DNS_MAX_SERVERS
#endif
#else
#define LWIP_DHCP6_PROVIDE_DNS_SERVERS 0
#endif
/** Option handling: options are parsed in dhcp6_parse_reply
* and saved in an array where other functions can load them from.
* This might be moved into the struct dhcp6 (not necessarily since
* lwIP is single-threaded and the array is only used while in recv
* callback). */
enum dhcp6_option_idx {
DHCP6_OPTION_IDX_CLI_ID = 0,
DHCP6_OPTION_IDX_SERVER_ID,
#if LWIP_DHCP6_PROVIDE_DNS_SERVERS
DHCP6_OPTION_IDX_DNS_SERVER,
DHCP6_OPTION_IDX_DOMAIN_LIST,
#endif /* LWIP_DHCP_PROVIDE_DNS_SERVERS */
#if LWIP_DHCP6_GET_NTP_SRV
DHCP6_OPTION_IDX_NTP_SERVER,
#endif /* LWIP_DHCP_GET_NTP_SRV */
DHCP6_OPTION_IDX_MAX
};
struct dhcp6_option_info {
u8_t option_given;
u16_t val_start;
u16_t val_length;
};
/** Holds the decoded option info, only valid while in dhcp6_recv. */
struct dhcp6_option_info dhcp6_rx_options[DHCP6_OPTION_IDX_MAX];
#define dhcp6_option_given(dhcp6, idx) (dhcp6_rx_options[idx].option_given != 0)
#define dhcp6_got_option(dhcp6, idx) (dhcp6_rx_options[idx].option_given = 1)
#define dhcp6_clear_option(dhcp6, idx) (dhcp6_rx_options[idx].option_given = 0)
#define dhcp6_clear_all_options(dhcp6) (memset(dhcp6_rx_options, 0, sizeof(dhcp6_rx_options)))
#define dhcp6_get_option_start(dhcp6, idx) (dhcp6_rx_options[idx].val_start)
#define dhcp6_get_option_length(dhcp6, idx) (dhcp6_rx_options[idx].val_length)
#define dhcp6_set_option(dhcp6, idx, start, len) do { dhcp6_rx_options[idx].val_start = (start); dhcp6_rx_options[idx].val_length = (len); }while(0)
const ip_addr_t dhcp6_All_DHCP6_Relay_Agents_and_Servers = IPADDR6_INIT_HOST(0xFF020000, 0, 0, 0x00010002);
const ip_addr_t dhcp6_All_DHCP6_Servers = IPADDR6_INIT_HOST(0xFF020000, 0, 0, 0x00010003);
static struct udp_pcb *dhcp6_pcb;
static u8_t dhcp6_pcb_refcount;
/* receive, unfold, parse and free incoming messages */
static void dhcp6_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port);
/** Ensure DHCP PCB is allocated and bound */
static err_t
dhcp6_inc_pcb_refcount(void)
{
if (dhcp6_pcb_refcount == 0) {
LWIP_ASSERT("dhcp6_inc_pcb_refcount(): memory leak", dhcp6_pcb == NULL);
/* allocate UDP PCB */
dhcp6_pcb = udp_new_ip6();
if (dhcp6_pcb == NULL) {
return ERR_MEM;
}
ip_set_option(dhcp6_pcb, SOF_BROADCAST);
/* set up local and remote port for the pcb -> listen on all interfaces on all src/dest IPs */
udp_bind(dhcp6_pcb, IP6_ADDR_ANY, DHCP6_CLIENT_PORT);
udp_recv(dhcp6_pcb, dhcp6_recv, NULL);
}
dhcp6_pcb_refcount++;
return ERR_OK;
}
/** Free DHCP PCB if the last netif stops using it */
static void
dhcp6_dec_pcb_refcount(void)
{
LWIP_ASSERT("dhcp6_pcb_refcount(): refcount error", (dhcp6_pcb_refcount > 0));
dhcp6_pcb_refcount--;
if (dhcp6_pcb_refcount == 0) {
udp_remove(dhcp6_pcb);
dhcp6_pcb = NULL;
}
}
/**
* @ingroup dhcp6
* Set a statically allocated struct dhcp6 to work with.
* Using this prevents dhcp6_start to allocate it using mem_malloc.
*
* @param netif the netif for which to set the struct dhcp
* @param dhcp6 (uninitialised) dhcp6 struct allocated by the application
*/
void
dhcp6_set_struct(struct netif *netif, struct dhcp6 *dhcp6)
{
LWIP_ASSERT("netif != NULL", netif != NULL);
LWIP_ASSERT("dhcp6 != NULL", dhcp6 != NULL);
LWIP_ASSERT("netif already has a struct dhcp6 set", netif_dhcp6_data(netif) == NULL);
/* clear data structure */
memset(dhcp6, 0, sizeof(struct dhcp6));
/* dhcp6_set_state(&dhcp, DHCP6_STATE_OFF); */
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, dhcp6);
}
/**
* @ingroup dhcp6
* Removes a struct dhcp6 from a netif.
*
* ATTENTION: Only use this when not using dhcp6_set_struct() to allocate the
* struct dhcp6 since the memory is passed back to the heap.
*
* @param netif the netif from which to remove the struct dhcp
*/
void dhcp6_cleanup(struct netif *netif)
{
LWIP_ASSERT("netif != NULL", netif != NULL);
if (netif_dhcp6_data(netif) != NULL) {
mem_free(netif_dhcp6_data(netif));
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL);
}
}
static struct dhcp6*
dhcp6_get_struct(struct netif *netif, const char *dbg_requester)
{
struct dhcp6 *dhcp6 = netif_dhcp6_data(netif);
if (dhcp6 == NULL) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("%s: mallocing new DHCPv6 client\n", dbg_requester));
dhcp6 = (struct dhcp6 *)mem_malloc(sizeof(struct dhcp6));
if (dhcp6 == NULL) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("%s: could not allocate dhcp6\n", dbg_requester));
return NULL;
}
/* clear data structure, this implies DHCP6_STATE_OFF */
memset(dhcp6, 0, sizeof(struct dhcp6));
/* store this dhcp6 client in the netif */
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, dhcp6);
} else {
/* already has DHCP6 client attached */
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("%s: using existing DHCPv6 client\n", dbg_requester));
}
if (!dhcp6->pcb_allocated) {
if (dhcp6_inc_pcb_refcount() != ERR_OK) { /* ensure DHCP6 PCB is allocated */
mem_free(dhcp6);
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL);
return NULL;
}
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("%s: allocated dhcp6", dbg_requester));
dhcp6->pcb_allocated = 1;
}
return dhcp6;
}
/*
* Set the DHCPv6 state
* If the state changed, reset the number of tries.
*/
static void
dhcp6_set_state(struct dhcp6 *dhcp6, u8_t new_state, const char *dbg_caller)
{
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("DHCPv6 state: %d -> %d (%s)\n",
dhcp6->state, new_state, dbg_caller));
if (new_state != dhcp6->state) {
dhcp6->state = new_state;
dhcp6->tries = 0;
dhcp6->request_timeout = 0;
}
}
static int
dhcp6_stateless_enabled(struct dhcp6 *dhcp6)
{
if ((dhcp6->state == DHCP6_STATE_STATELESS_IDLE) ||
(dhcp6->state == DHCP6_STATE_REQUESTING_CONFIG)) {
return 1;
}
return 0;
}
/*static int
dhcp6_stateful_enabled(struct dhcp6 *dhcp6)
{
if (dhcp6->state == DHCP6_STATE_OFF) {
return 0;
}
if (dhcp6_stateless_enabled(dhcp6)) {
return 0;
}
return 1;
}*/
/**
* @ingroup dhcp6
* Enable stateful DHCPv6 on this netif
* Requests are sent on receipt of an RA message with the
* ND6_RA_FLAG_MANAGED_ADDR_CONFIG flag set.
*
* A struct dhcp6 will be allocated for this netif if not
* set via @ref dhcp6_set_struct before.
*
* @todo: stateful DHCPv6 not supported, yet
*/
err_t
dhcp6_enable_stateful(struct netif *netif)
{
LWIP_UNUSED_ARG(netif);
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("stateful dhcp6 not implemented yet"));
return ERR_VAL;
}
/**
* @ingroup dhcp6
* Enable stateless DHCPv6 on this netif
* Requests are sent on receipt of an RA message with the
* ND6_RA_FLAG_OTHER_CONFIG flag set.
*
* A struct dhcp6 will be allocated for this netif if not
* set via @ref dhcp6_set_struct before.
*/
err_t
dhcp6_enable_stateless(struct netif *netif)
{
struct dhcp6 *dhcp6;
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_enable_stateless(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
dhcp6 = dhcp6_get_struct(netif, "dhcp6_enable_stateless()");
if (dhcp6 == NULL) {
return ERR_MEM;
}
if (dhcp6_stateless_enabled(dhcp6)) {
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp6_enable_stateless(): stateless DHCPv6 already enabled"));
return ERR_OK;
} else if (dhcp6->state != DHCP6_STATE_OFF) {
/* stateful running */
/* @todo: stop stateful once it is implemented */
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp6_enable_stateless(): switching from stateful to stateless DHCPv6"));
}
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp6_enable_stateless(): stateless DHCPv6 enabled\n"));
dhcp6_set_state(dhcp6, DHCP6_STATE_STATELESS_IDLE, "dhcp6_enable_stateless");
return ERR_OK;
}
/**
* @ingroup dhcp6
* Disable stateful or stateless DHCPv6 on this netif
* Requests are sent on receipt of an RA message with the
* ND6_RA_FLAG_OTHER_CONFIG flag set.
*/
void
dhcp6_disable(struct netif *netif)
{
struct dhcp6 *dhcp6;
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_disable(netif=%p) %c%c%"U16_F"\n", (void *)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
dhcp6 = netif_dhcp6_data(netif);
if (dhcp6 != NULL) {
if (dhcp6->state != DHCP6_STATE_OFF) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_disable(): DHCPv6 disabled (old state: %s)\n",
(dhcp6_stateless_enabled(dhcp6) ? "stateless" : "stateful")));
dhcp6_set_state(dhcp6, DHCP6_STATE_OFF, "dhcp6_disable");
if (dhcp6->pcb_allocated != 0) {
dhcp6_dec_pcb_refcount(); /* free DHCPv6 PCB if not needed any more */
dhcp6->pcb_allocated = 0;
}
}
}
}
/**
* Create a DHCPv6 request, fill in common headers
*
* @param netif the netif under DHCPv6 control
* @param dhcp6 dhcp6 control struct
* @param message_type message type of the request
* @param opt_len_alloc option length to allocate
* @param options_out_len option length on exit
* @return a pbuf for the message
*/
static struct pbuf *
dhcp6_create_msg(struct netif *netif, struct dhcp6 *dhcp6, u8_t message_type,
u16_t opt_len_alloc, u16_t *options_out_len)
{
struct pbuf *p_out;
struct dhcp6_msg *msg_out;
LWIP_ERROR("dhcp6_create_msg: netif != NULL", (netif != NULL), return NULL;);
LWIP_ERROR("dhcp6_create_msg: dhcp6 != NULL", (dhcp6 != NULL), return NULL;);
p_out = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcp6_msg) + opt_len_alloc, PBUF_RAM);
if (p_out == NULL) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS,
("dhcp6_create_msg(): could not allocate pbuf\n"));
return NULL;
}
LWIP_ASSERT("dhcp6_create_msg: check that first pbuf can hold struct dhcp6_msg",
(p_out->len >= sizeof(struct dhcp6_msg) + opt_len_alloc));
/* @todo: limit new xid for certain message types? */
/* reuse transaction identifier in retransmissions */
if (dhcp6->tries == 0) {
dhcp6->xid = LWIP_RAND() & 0xFFFFFF;
}
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE,
("transaction id xid(%"X32_F")\n", dhcp6->xid));
msg_out = (struct dhcp6_msg *)p_out->payload;
memset(msg_out, 0, sizeof(struct dhcp6_msg) + opt_len_alloc);
msg_out->msgtype = message_type;
msg_out->transaction_id[0] = (u8_t)(dhcp6->xid >> 16);
msg_out->transaction_id[1] = (u8_t)(dhcp6->xid >> 8);
msg_out->transaction_id[2] = (u8_t)dhcp6->xid;
*options_out_len = 0;
return p_out;
}
static u16_t
dhcp6_option_short(u16_t options_out_len, u8_t *options, u16_t value)
{
options[options_out_len++] = (u8_t)((value & 0xff00U) >> 8);
options[options_out_len++] = (u8_t) (value & 0x00ffU);
return options_out_len;
}
static u16_t
dhcp6_option_optionrequest(u16_t options_out_len, u8_t *options, const u16_t *req_options,
u16_t num_req_options, u16_t max_len)
{
size_t i;
u16_t ret;
LWIP_ASSERT("dhcp6_option_optionrequest: options_out_len + sizeof(struct dhcp6_msg) + addlen <= max_len",
sizeof(struct dhcp6_msg) + options_out_len + 4U + (2U * num_req_options) <= max_len);
LWIP_UNUSED_ARG(max_len);
ret = dhcp6_option_short(options_out_len, options, DHCP6_OPTION_ORO);
ret = dhcp6_option_short(ret, options, 2 * num_req_options);
for (i = 0; i < num_req_options; i++) {
ret = dhcp6_option_short(ret, options, req_options[i]);
}
return ret;
}
/* All options are added, shrink the pbuf to the required size */
static void
dhcp6_msg_finalize(u16_t options_out_len, struct pbuf *p_out)
{
/* shrink the pbuf to the actual content length */
pbuf_realloc(p_out, (u16_t)(sizeof(struct dhcp6_msg) + options_out_len));
}
#if LWIP_IPV6_DHCP6_STATELESS
static void
dhcp6_information_request(struct netif *netif, struct dhcp6 *dhcp6)
{
const u16_t requested_options[] = {DHCP6_OPTION_DNS_SERVERS, DHCP6_OPTION_DOMAIN_LIST, DHCP6_OPTION_SNTP_SERVERS};
u16_t msecs;
struct pbuf *p_out;
u16_t options_out_len;
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_information_request()\n"));
/* create and initialize the DHCP message header */
p_out = dhcp6_create_msg(netif, dhcp6, DHCP6_INFOREQUEST, 4 + sizeof(requested_options), &options_out_len);
if (p_out != NULL) {
err_t err;
struct dhcp6_msg *msg_out = (struct dhcp6_msg *)p_out->payload;
u8_t *options = (u8_t *)(msg_out + 1);
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_information_request: making request\n"));
options_out_len = dhcp6_option_optionrequest(options_out_len, options, requested_options,
LWIP_ARRAYSIZE(requested_options), p_out->len);
LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, DHCP6_STATE_REQUESTING_CONFIG, msg_out,
DHCP6_INFOREQUEST, options_out_len, p_out->len);
dhcp6_msg_finalize(options_out_len, p_out);
err = udp_sendto_if(dhcp6_pcb, p_out, &dhcp6_All_DHCP6_Relay_Agents_and_Servers, DHCP6_SERVER_PORT, netif);
pbuf_free(p_out);
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_information_request: INFOREQUESTING -> %d\n", (int)err));
LWIP_UNUSED_ARG(err);
} else {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("dhcp6_information_request: could not allocate DHCP6 request\n"));
}
dhcp6_set_state(dhcp6, DHCP6_STATE_REQUESTING_CONFIG, "dhcp6_information_request");
if (dhcp6->tries < 255) {
dhcp6->tries++;
}
msecs = (u16_t)((dhcp6->tries < 6 ? 1 << dhcp6->tries : 60) * 1000);
dhcp6->request_timeout = (u16_t)((msecs + DHCP6_TIMER_MSECS - 1) / DHCP6_TIMER_MSECS);
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_information_request(): set request timeout %"U16_F" msecs\n", msecs));
}
static err_t
dhcp6_request_config(struct netif *netif, struct dhcp6 *dhcp6)
{
/* stateless mode enabled and no request running? */
if (dhcp6->state == DHCP6_STATE_STATELESS_IDLE) {
/* send Information-request and wait for answer; setup receive timeout */
dhcp6_information_request(netif, dhcp6);
}
return ERR_OK;
}
static void
dhcp6_abort_config_request(struct dhcp6 *dhcp6)
{
if (dhcp6->state == DHCP6_STATE_REQUESTING_CONFIG) {
/* abort running request */
dhcp6_set_state(dhcp6, DHCP6_STATE_STATELESS_IDLE, "dhcp6_abort_config_request");
}
}
/* Handle a REPLY to INFOREQUEST
* This parses DNS and NTP server addresses from the reply.
*/
static void
dhcp6_handle_config_reply(struct netif *netif, struct pbuf *p_msg_in)
{
struct dhcp6 *dhcp6 = netif_dhcp6_data(netif);
LWIP_UNUSED_ARG(dhcp6);
LWIP_UNUSED_ARG(p_msg_in);
#if LWIP_DHCP6_PROVIDE_DNS_SERVERS
if (dhcp6_option_given(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER)) {
ip_addr_t dns_addr;
ip6_addr_t *dns_addr6;
u16_t op_start = dhcp6_get_option_start(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER);
u16_t op_len = dhcp6_get_option_length(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER);
u16_t idx;
u8_t n;
memset(&dns_addr, 0, sizeof(dns_addr));
dns_addr6 = ip_2_ip6(&dns_addr);
for (n = 0, idx = op_start; (idx < op_start + op_len) && (n < LWIP_DHCP6_PROVIDE_DNS_SERVERS);
n++, idx += sizeof(struct ip6_addr_packed)) {
u16_t copied = pbuf_copy_partial(p_msg_in, dns_addr6, sizeof(struct ip6_addr_packed), idx);
if (copied != sizeof(struct ip6_addr_packed)) {
/* pbuf length mismatch */
return;
}
ip6_addr_assign_zone(dns_addr6, IP6_UNKNOWN, netif);
/* @todo: do we need a different offset than DHCP(v4)? */
dns_setserver(n, &dns_addr);
}
}
/* @ todo: parse and set Domain Search List */
#endif /* LWIP_DHCP6_PROVIDE_DNS_SERVERS */
#if LWIP_DHCP6_GET_NTP_SRV
if (dhcp6_option_given(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER)) {
ip_addr_t ntp_server_addrs[LWIP_DHCP6_MAX_NTP_SERVERS];
u16_t op_start = dhcp6_get_option_start(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER);
u16_t op_len = dhcp6_get_option_length(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER);
u16_t idx;
u8_t n;
for (n = 0, idx = op_start; (idx < op_start + op_len) && (n < LWIP_DHCP6_MAX_NTP_SERVERS);
n++, idx += sizeof(struct ip6_addr_packed)) {
u16_t copied;
ip6_addr_t *ntp_addr6 = ip_2_ip6(&ntp_server_addrs[n]);
ip_addr_set_zero_ip6(&ntp_server_addrs[n]);
copied = pbuf_copy_partial(p_msg_in, ntp_addr6, sizeof(struct ip6_addr_packed), idx);
if (copied != sizeof(struct ip6_addr_packed)) {
/* pbuf length mismatch */
return;
}
ip6_addr_assign_zone(ntp_addr6, IP6_UNKNOWN, netif);
}
dhcp6_set_ntp_servers(n, ntp_server_addrs);
}
#endif /* LWIP_DHCP6_GET_NTP_SRV */
}
#endif /* LWIP_IPV6_DHCP6_STATELESS */
/** This function is called from nd6 module when an RA messsage is received
* It triggers DHCPv6 requests (if enabled).
*/
void
dhcp6_nd6_ra_trigger(struct netif *netif, u8_t managed_addr_config, u8_t other_config)
{
struct dhcp6 *dhcp6;
LWIP_ASSERT("netif != NULL", netif != NULL);
dhcp6 = netif_dhcp6_data(netif);
LWIP_UNUSED_ARG(managed_addr_config);
LWIP_UNUSED_ARG(other_config);
LWIP_UNUSED_ARG(dhcp6);
#if LWIP_IPV6_DHCP6_STATELESS
if (dhcp6 != NULL) {
if (dhcp6_stateless_enabled(dhcp6)) {
if (other_config) {
dhcp6_request_config(netif, dhcp6);
} else {
dhcp6_abort_config_request(dhcp6);
}
}
}
#endif /* LWIP_IPV6_DHCP6_STATELESS */
}
/**
* Parse the DHCPv6 message and extract the DHCPv6 options.
*
* Extract the DHCPv6 options (offset + length) so that we can later easily
* check for them or extract the contents.
*/
static err_t
dhcp6_parse_reply(struct pbuf *p, struct dhcp6 *dhcp6)
{
u16_t offset;
u16_t offset_max;
u16_t options_idx;
struct dhcp6_msg *msg_in;
LWIP_UNUSED_ARG(dhcp6);
/* clear received options */
dhcp6_clear_all_options(dhcp6);
msg_in = (struct dhcp6_msg *)p->payload;
/* parse options */
options_idx = sizeof(struct dhcp6_msg);
/* parse options to the end of the received packet */
offset_max = p->tot_len;
offset = options_idx;
/* at least 4 byte to read? */
while ((offset + 4 <= offset_max)) {
u8_t op_len_buf[4];
u8_t *op_len;
u16_t op;
u16_t len;
u16_t val_offset = (u16_t)(offset + 4);
if (val_offset < offset) {
/* overflow */
return ERR_BUF;
}
/* copy option + length, might be split accross pbufs */
op_len = (u8_t *)pbuf_get_contiguous(p, op_len_buf, 4, 4, offset);
if (op_len == NULL) {
/* failed to get option and length */
return ERR_VAL;
}
op = (op_len[0] << 8) | op_len[1];
len = (op_len[2] << 8) | op_len[3];
offset = val_offset + len;
if (offset < val_offset) {
/* overflow */
return ERR_BUF;
}
switch (op) {
case (DHCP6_OPTION_CLIENTID):
dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_CLI_ID);
dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_CLI_ID, val_offset, len);
break;
case (DHCP6_OPTION_SERVERID):
dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_SERVER_ID);
dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_SERVER_ID, val_offset, len);
break;
#if LWIP_DHCP6_PROVIDE_DNS_SERVERS
case (DHCP6_OPTION_DNS_SERVERS):
dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER);
dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_DNS_SERVER, val_offset, len);
break;
case (DHCP6_OPTION_DOMAIN_LIST):
dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_DOMAIN_LIST);
dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_DOMAIN_LIST, val_offset, len);
break;
#endif /* LWIP_DHCP6_PROVIDE_DNS_SERVERS */
#if LWIP_DHCP6_GET_NTP_SRV
case (DHCP6_OPTION_SNTP_SERVERS):
dhcp6_got_option(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER);
dhcp6_set_option(dhcp6, DHCP6_OPTION_IDX_NTP_SERVER, val_offset, len);
break;
#endif /* LWIP_DHCP6_GET_NTP_SRV*/
default:
LWIP_DEBUGF(DHCP6_DEBUG, ("skipping option %"U16_F" in options\n", op));
LWIP_HOOK_DHCP6_PARSE_OPTION(ip_current_netif(), dhcp6, dhcp6->state, msg_in,
msg_in->msgtype, op, len, q, val_offset);
break;
}
}
return ERR_OK;
}
static void
dhcp6_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port)
{
struct netif *netif = ip_current_input_netif();
struct dhcp6 *dhcp6 = netif_dhcp6_data(netif);
struct dhcp6_msg *reply_msg = (struct dhcp6_msg *)p->payload;
u8_t msg_type;
u32_t xid;
LWIP_UNUSED_ARG(arg);
/* Caught DHCPv6 message from netif that does not have DHCPv6 enabled? -> not interested */
if ((dhcp6 == NULL) || (dhcp6->pcb_allocated == 0)) {
goto free_pbuf_and_return;
}
LWIP_ERROR("invalid server address type", IP_IS_V6(addr), goto free_pbuf_and_return;);
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_recv(pbuf = %p) from DHCPv6 server %s port %"U16_F"\n", (void *)p,
ipaddr_ntoa(addr), port));
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("pbuf->len = %"U16_F"\n", p->len));
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("pbuf->tot_len = %"U16_F"\n", p->tot_len));
/* prevent warnings about unused arguments */
LWIP_UNUSED_ARG(pcb);
LWIP_UNUSED_ARG(addr);
LWIP_UNUSED_ARG(port);
if (p->len < sizeof(struct dhcp6_msg)) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("DHCPv6 reply message or pbuf too short\n"));
goto free_pbuf_and_return;
}
/* match transaction ID against what we expected */
xid = reply_msg->transaction_id[0] << 16;
xid |= reply_msg->transaction_id[1] << 8;
xid |= reply_msg->transaction_id[2];
if (xid != dhcp6->xid) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING,
("transaction id mismatch reply_msg->xid(%"X32_F")!= dhcp6->xid(%"X32_F")\n", xid, dhcp6->xid));
goto free_pbuf_and_return;
}
/* option fields could be unfold? */
if (dhcp6_parse_reply(p, dhcp6) != ERR_OK) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS,
("problem unfolding DHCPv6 message - too short on memory?\n"));
goto free_pbuf_and_return;
}
/* read DHCP message type */
msg_type = reply_msg->msgtype;
/* message type is DHCP6 REPLY? */
if (msg_type == DHCP6_REPLY) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("DHCP6_REPLY received\n"));
#if LWIP_IPV6_DHCP6_STATELESS
/* in info-requesting state? */
if (dhcp6->state == DHCP6_STATE_REQUESTING_CONFIG) {
dhcp6_set_state(dhcp6, DHCP6_STATE_STATELESS_IDLE, "dhcp6_recv");
dhcp6_handle_config_reply(netif, p);
} else
#endif /* LWIP_IPV6_DHCP6_STATELESS */
{
/* @todo: handle reply in other states? */
}
} else {
/* @todo: handle other message types */
}
free_pbuf_and_return:
pbuf_free(p);
}
/**
* A DHCPv6 request has timed out.
*
* The timer that was started with the DHCPv6 request has
* timed out, indicating no response was received in time.
*/
static void
dhcp6_timeout(struct netif *netif, struct dhcp6 *dhcp6)
{
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp6_timeout()\n"));
LWIP_UNUSED_ARG(netif);
LWIP_UNUSED_ARG(dhcp6);
#if LWIP_IPV6_DHCP6_STATELESS
/* back-off period has passed, or server selection timed out */
if (dhcp6->state == DHCP6_STATE_REQUESTING_CONFIG) {
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE, ("dhcp6_timeout(): retrying information request\n"));
dhcp6_information_request(netif, dhcp6);
}
#endif /* LWIP_IPV6_DHCP6_STATELESS */
}
/**
* DHCPv6 timeout handling (this function must be called every 500ms,
* see @ref DHCP6_TIMER_MSECS).
*
* A DHCPv6 server is expected to respond within a short period of time.
* This timer checks whether an outstanding DHCPv6 request is timed out.
*/
void
dhcp6_tmr(void)
{
struct netif *netif;
/* loop through netif's */
NETIF_FOREACH(netif) {
struct dhcp6 *dhcp6 = netif_dhcp6_data(netif);
/* only act on DHCPv6 configured interfaces */
if (dhcp6 != NULL) {
/* timer is active (non zero), and is about to trigger now */
if (dhcp6->request_timeout > 1) {
dhcp6->request_timeout--;
} else if (dhcp6->request_timeout == 1) {
dhcp6->request_timeout--;
/* { dhcp6->request_timeout == 0 } */
LWIP_DEBUGF(DHCP6_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp6_tmr(): request timeout\n"));
/* this client's request timeout triggered */
dhcp6_timeout(netif, dhcp6);
}
}
}
}
#endif /* LWIP_IPV6 && LWIP_IPV6_DHCP6 */

123
core/ipv6/ethip6.c Executable file
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/**
* @file
*
* Ethernet output for IPv6. Uses ND tables for link-layer addressing.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Ivan Delamer <delamer@inicotech.com>
*
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
#include "lwip/opt.h"
#if LWIP_IPV6 && LWIP_ETHERNET
#include "lwip/ethip6.h"
#include "lwip/nd6.h"
#include "lwip/pbuf.h"
#include "lwip/ip6.h"
#include "lwip/ip6_addr.h"
#include "lwip/inet_chksum.h"
#include "lwip/netif.h"
#include "lwip/icmp6.h"
#include "lwip/prot/ethernet.h"
#include "netif/ethernet.h"
#include <string.h>
/**
* Resolve and fill-in Ethernet address header for outgoing IPv6 packet.
*
* For IPv6 multicast, corresponding Ethernet addresses
* are selected and the packet is transmitted on the link.
*
* For unicast addresses, ask the ND6 module what to do. It will either let us
* send the the packet right away, or queue the packet for later itself, unless
* an error occurs.
*
* @todo anycast addresses
*
* @param netif The lwIP network interface which the IP packet will be sent on.
* @param q The pbuf(s) containing the IP packet to be sent.
* @param ip6addr The IP address of the packet destination.
*
* @return
* - ERR_OK or the return value of @ref nd6_get_next_hop_addr_or_queue.
*/
err_t
ethip6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr)
{
struct eth_addr dest;
const u8_t *hwaddr;
err_t result;
LWIP_ASSERT_CORE_LOCKED();
/* The destination IP address must be properly zoned from here on down. */
IP6_ADDR_ZONECHECK_NETIF(ip6addr, netif);
/* multicast destination IP address? */
if (ip6_addr_ismulticast(ip6addr)) {
/* Hash IP multicast address to MAC address.*/
dest.addr[0] = 0x33;
dest.addr[1] = 0x33;
dest.addr[2] = ((const u8_t *)(&(ip6addr->addr[3])))[0];
dest.addr[3] = ((const u8_t *)(&(ip6addr->addr[3])))[1];
dest.addr[4] = ((const u8_t *)(&(ip6addr->addr[3])))[2];
dest.addr[5] = ((const u8_t *)(&(ip6addr->addr[3])))[3];
/* Send out. */
return ethernet_output(netif, q, (const struct eth_addr*)(netif->hwaddr), &dest, ETHTYPE_IPV6);
}
/* We have a unicast destination IP address */
/* @todo anycast? */
/* Ask ND6 what to do with the packet. */
result = nd6_get_next_hop_addr_or_queue(netif, q, ip6addr, &hwaddr);
if (result != ERR_OK) {
return result;
}
/* If no hardware address is returned, nd6 has queued the packet for later. */
if (hwaddr == NULL) {
return ERR_OK;
}
/* Send out the packet using the returned hardware address. */
SMEMCPY(dest.addr, hwaddr, 6);
return ethernet_output(netif, q, (const struct eth_addr*)(netif->hwaddr), &dest, ETHTYPE_IPV6);
}
#endif /* LWIP_IPV6 && LWIP_ETHERNET */

425
core/ipv6/icmp6.c Executable file
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/**
* @file
*
* IPv6 version of ICMP, as per RFC 4443.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Ivan Delamer <delamer@inicotech.com>
*
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
#include "lwip/opt.h"
#if LWIP_ICMP6 && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
#include "lwip/icmp6.h"
#include "lwip/prot/icmp6.h"
#include "lwip/ip6.h"
#include "lwip/ip6_addr.h"
#include "lwip/inet_chksum.h"
#include "lwip/pbuf.h"
#include "lwip/netif.h"
#include "lwip/nd6.h"
#include "lwip/mld6.h"
#include "lwip/ip.h"
#include "lwip/stats.h"
#include <string.h>
#if LWIP_ICMP6_DATASIZE == 0
#undef LWIP_ICMP6_DATASIZE
#define LWIP_ICMP6_DATASIZE 8
#endif
/* Forward declarations */
static void icmp6_send_response(struct pbuf *p, u8_t code, u32_t data, u8_t type);
static void icmp6_send_response_with_addrs(struct pbuf *p, u8_t code, u32_t data,
u8_t type, const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr);
static void icmp6_send_response_with_addrs_and_netif(struct pbuf *p, u8_t code, u32_t data,
u8_t type, const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr, struct netif *netif);
/**
* Process an input ICMPv6 message. Called by ip6_input.
*
* Will generate a reply for echo requests. Other messages are forwarded
* to nd6_input, or mld6_input.
*
* @param p the mld packet, p->payload pointing to the icmpv6 header
* @param inp the netif on which this packet was received
*/
void
icmp6_input(struct pbuf *p, struct netif *inp)
{
struct icmp6_hdr *icmp6hdr;
struct pbuf *r;
const ip6_addr_t *reply_src;
ICMP6_STATS_INC(icmp6.recv);
/* Check that ICMPv6 header fits in payload */
if (p->len < sizeof(struct icmp6_hdr)) {
/* drop short packets */
pbuf_free(p);
ICMP6_STATS_INC(icmp6.lenerr);
ICMP6_STATS_INC(icmp6.drop);
return;
}
icmp6hdr = (struct icmp6_hdr *)p->payload;
#if CHECKSUM_CHECK_ICMP6
IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_CHECK_ICMP6) {
if (ip6_chksum_pseudo(p, IP6_NEXTH_ICMP6, p->tot_len, ip6_current_src_addr(),
ip6_current_dest_addr()) != 0) {
/* Checksum failed */
pbuf_free(p);
ICMP6_STATS_INC(icmp6.chkerr);
ICMP6_STATS_INC(icmp6.drop);
return;
}
}
#endif /* CHECKSUM_CHECK_ICMP6 */
switch (icmp6hdr->type) {
case ICMP6_TYPE_NA: /* Neighbor advertisement */
case ICMP6_TYPE_NS: /* Neighbor solicitation */
case ICMP6_TYPE_RA: /* Router advertisement */
case ICMP6_TYPE_RD: /* Redirect */
case ICMP6_TYPE_PTB: /* Packet too big */
nd6_input(p, inp);
return;
case ICMP6_TYPE_RS:
#if LWIP_IPV6_FORWARD
/* @todo implement router functionality */
#endif
break;
#if LWIP_IPV6_MLD
case ICMP6_TYPE_MLQ:
case ICMP6_TYPE_MLR:
case ICMP6_TYPE_MLD:
mld6_input(p, inp);
return;
#endif
case ICMP6_TYPE_EREQ:
#if !LWIP_MULTICAST_PING
/* multicast destination address? */
if (ip6_addr_ismulticast(ip6_current_dest_addr())) {
/* drop */
pbuf_free(p);
ICMP6_STATS_INC(icmp6.drop);
return;
}
#endif /* LWIP_MULTICAST_PING */
/* Allocate reply. */
r = pbuf_alloc(PBUF_IP, p->tot_len, PBUF_RAM);
if (r == NULL) {
/* drop */
pbuf_free(p);
ICMP6_STATS_INC(icmp6.memerr);
return;
}
/* Copy echo request. */
if (pbuf_copy(r, p) != ERR_OK) {
/* drop */
pbuf_free(p);
pbuf_free(r);
ICMP6_STATS_INC(icmp6.err);
return;
}
/* Determine reply source IPv6 address. */
#if LWIP_MULTICAST_PING
if (ip6_addr_ismulticast(ip6_current_dest_addr())) {
reply_src = ip_2_ip6(ip6_select_source_address(inp, ip6_current_src_addr()));
if (reply_src == NULL) {
/* drop */
pbuf_free(p);
pbuf_free(r);
ICMP6_STATS_INC(icmp6.rterr);
return;
}
}
else
#endif /* LWIP_MULTICAST_PING */
{
reply_src = ip6_current_dest_addr();
}
/* Set fields in reply. */
((struct icmp6_echo_hdr *)(r->payload))->type = ICMP6_TYPE_EREP;
((struct icmp6_echo_hdr *)(r->payload))->chksum = 0;
#if CHECKSUM_GEN_ICMP6
IF__NETIF_CHECKSUM_ENABLED(inp, NETIF_CHECKSUM_GEN_ICMP6) {
((struct icmp6_echo_hdr *)(r->payload))->chksum = ip6_chksum_pseudo(r,
IP6_NEXTH_ICMP6, r->tot_len, reply_src, ip6_current_src_addr());
}
#endif /* CHECKSUM_GEN_ICMP6 */
/* Send reply. */
ICMP6_STATS_INC(icmp6.xmit);
ip6_output_if(r, reply_src, ip6_current_src_addr(),
LWIP_ICMP6_HL, 0, IP6_NEXTH_ICMP6, inp);
pbuf_free(r);
break;
default:
ICMP6_STATS_INC(icmp6.proterr);
ICMP6_STATS_INC(icmp6.drop);
break;
}
pbuf_free(p);
}
/**
* Send an icmpv6 'destination unreachable' packet.
*
* This function must be used only in direct response to a packet that is being
* received right now. Otherwise, address zones would be lost.
*
* @param p the input packet for which the 'unreachable' should be sent,
* p->payload pointing to the IPv6 header
* @param c ICMPv6 code for the unreachable type
*/
void
icmp6_dest_unreach(struct pbuf *p, enum icmp6_dur_code c)
{
icmp6_send_response(p, c, 0, ICMP6_TYPE_DUR);
}
/**
* Send an icmpv6 'packet too big' packet.
*
* This function must be used only in direct response to a packet that is being
* received right now. Otherwise, address zones would be lost.
*
* @param p the input packet for which the 'packet too big' should be sent,
* p->payload pointing to the IPv6 header
* @param mtu the maximum mtu that we can accept
*/
void
icmp6_packet_too_big(struct pbuf *p, u32_t mtu)
{
icmp6_send_response(p, 0, mtu, ICMP6_TYPE_PTB);
}
/**
* Send an icmpv6 'time exceeded' packet.
*
* This function must be used only in direct response to a packet that is being
* received right now. Otherwise, address zones would be lost.
*
* @param p the input packet for which the 'time exceeded' should be sent,
* p->payload pointing to the IPv6 header
* @param c ICMPv6 code for the time exceeded type
*/
void
icmp6_time_exceeded(struct pbuf *p, enum icmp6_te_code c)
{
icmp6_send_response(p, c, 0, ICMP6_TYPE_TE);
}
/**
* Send an icmpv6 'time exceeded' packet, with explicit source and destination
* addresses.
*
* This function may be used to send a response sometime after receiving the
* packet for which this response is meant. The provided source and destination
* addresses are used primarily to retain their zone information.
*
* @param p the input packet for which the 'time exceeded' should be sent,
* p->payload pointing to the IPv6 header
* @param c ICMPv6 code for the time exceeded type
* @param src_addr source address of the original packet, with zone information
* @param dest_addr destination address of the original packet, with zone
* information
*/
void
icmp6_time_exceeded_with_addrs(struct pbuf *p, enum icmp6_te_code c,
const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr)
{
icmp6_send_response_with_addrs(p, c, 0, ICMP6_TYPE_TE, src_addr, dest_addr);
}
/**
* Send an icmpv6 'parameter problem' packet.
*
* This function must be used only in direct response to a packet that is being
* received right now. Otherwise, address zones would be lost and the calculated
* offset would be wrong (calculated against ip6_current_header()).
*
* @param p the input packet for which the 'param problem' should be sent,
* p->payload pointing to the IP header
* @param c ICMPv6 code for the param problem type
* @param pointer the pointer to the byte where the parameter is found
*/
void
icmp6_param_problem(struct pbuf *p, enum icmp6_pp_code c, const void *pointer)
{
u32_t pointer_u32 = (u32_t)((const u8_t *)pointer - (const u8_t *)ip6_current_header());
icmp6_send_response(p, c, pointer_u32, ICMP6_TYPE_PP);
}
/**
* Send an ICMPv6 packet in response to an incoming packet.
* The packet is sent *to* ip_current_src_addr() on ip_current_netif().
*
* @param p the input packet for which the response should be sent,
* p->payload pointing to the IPv6 header
* @param code Code of the ICMPv6 header
* @param data Additional 32-bit parameter in the ICMPv6 header
* @param type Type of the ICMPv6 header
*/
static void
icmp6_send_response(struct pbuf *p, u8_t code, u32_t data, u8_t type)
{
const struct ip6_addr *reply_src, *reply_dest;
struct netif *netif = ip_current_netif();
LWIP_ASSERT("icmpv6 packet not a direct response", netif != NULL);
reply_dest = ip6_current_src_addr();
/* Select an address to use as source. */
reply_src = ip_2_ip6(ip6_select_source_address(netif, reply_dest));
if (reply_src == NULL) {
ICMP6_STATS_INC(icmp6.rterr);
return;
}
icmp6_send_response_with_addrs_and_netif(p, code, data, type, reply_src, reply_dest, netif);
}
/**
* Send an ICMPv6 packet in response to an incoming packet.
*
* Call this function if the packet is NOT sent as a direct response to an
* incoming packet, but rather sometime later (e.g. for a fragment reassembly
* timeout). The caller must provide the zoned source and destination addresses
* from the original packet with the src_addr and dest_addr parameters. The
* reason for this approach is that while the addresses themselves are part of
* the original packet, their zone information is not, thus possibly resulting
* in a link-local response being sent over the wrong link.
*
* @param p the input packet for which the response should be sent,
* p->payload pointing to the IPv6 header
* @param code Code of the ICMPv6 header
* @param data Additional 32-bit parameter in the ICMPv6 header
* @param type Type of the ICMPv6 header
* @param src_addr original source address
* @param dest_addr original destination address
*/
static void
icmp6_send_response_with_addrs(struct pbuf *p, u8_t code, u32_t data, u8_t type,
const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr)
{
const struct ip6_addr *reply_src, *reply_dest;
struct netif *netif;
/* Get the destination address and netif for this ICMP message. */
LWIP_ASSERT("must provide both source and destination", src_addr != NULL);
LWIP_ASSERT("must provide both source and destination", dest_addr != NULL);
/* Special case, as ip6_current_xxx is either NULL, or points
to a different packet than the one that expired. */
IP6_ADDR_ZONECHECK(src_addr);
IP6_ADDR_ZONECHECK(dest_addr);
/* Swap source and destination for the reply. */
reply_dest = src_addr;
reply_src = dest_addr;
netif = ip6_route(reply_src, reply_dest);
if (netif == NULL) {
ICMP6_STATS_INC(icmp6.rterr);
return;
}
icmp6_send_response_with_addrs_and_netif(p, code, data, type, reply_src,
reply_dest, netif);
}
/**
* Send an ICMPv6 packet (with srd/dst address and netif given).
*
* @param p the input packet for which the response should be sent,
* p->payload pointing to the IPv6 header
* @param code Code of the ICMPv6 header
* @param data Additional 32-bit parameter in the ICMPv6 header
* @param type Type of the ICMPv6 header
* @param reply_src source address of the packet to send
* @param reply_dest destination address of the packet to send
* @param netif netif to send the packet
*/
static void
icmp6_send_response_with_addrs_and_netif(struct pbuf *p, u8_t code, u32_t data, u8_t type,
const ip6_addr_t *reply_src, const ip6_addr_t *reply_dest, struct netif *netif)
{
struct pbuf *q;
struct icmp6_hdr *icmp6hdr;
/* ICMPv6 header + IPv6 header + data */
q = pbuf_alloc(PBUF_IP, sizeof(struct icmp6_hdr) + IP6_HLEN + LWIP_ICMP6_DATASIZE,
PBUF_RAM);
if (q == NULL) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded: failed to allocate pbuf for ICMPv6 packet.\n"));
ICMP6_STATS_INC(icmp6.memerr);
return;
}
LWIP_ASSERT("check that first pbuf can hold icmp 6message",
(q->len >= (sizeof(struct icmp6_hdr) + IP6_HLEN + LWIP_ICMP6_DATASIZE)));
icmp6hdr = (struct icmp6_hdr *)q->payload;
icmp6hdr->type = type;
icmp6hdr->code = code;
icmp6hdr->data = lwip_htonl(data);
/* copy fields from original packet */
SMEMCPY((u8_t *)q->payload + sizeof(struct icmp6_hdr), (u8_t *)p->payload,
IP6_HLEN + LWIP_ICMP6_DATASIZE);
/* calculate checksum */
icmp6hdr->chksum = 0;
#if CHECKSUM_GEN_ICMP6
IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP6) {
icmp6hdr->chksum = ip6_chksum_pseudo(q, IP6_NEXTH_ICMP6, q->tot_len,
reply_src, reply_dest);
}
#endif /* CHECKSUM_GEN_ICMP6 */
ICMP6_STATS_INC(icmp6.xmit);
ip6_output_if(q, reply_src, reply_dest, LWIP_ICMP6_HL, 0, IP6_NEXTH_ICMP6, netif);
pbuf_free(q);
}
#endif /* LWIP_ICMP6 && LWIP_IPV6 */

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/**
* @file
*
* INET v6 addresses.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Ivan Delamer <delamer@inicotech.com>
*
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
#include "lwip/opt.h"
#if LWIP_IPV6 && LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
#include "lwip/def.h"
#include "lwip/inet.h"
/** This variable is initialized by the system to contain the wildcard IPv6 address.
*/
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
#endif /* LWIP_IPV6 */

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core/ipv6/ip6.c Executable file
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343
core/ipv6/ip6_addr.c Executable file
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/**
* @file
*
* IPv6 addresses.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Ivan Delamer <delamer@inicotech.com>
*
* Functions for handling IPv6 addresses.
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
#include "lwip/opt.h"
#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
#include "lwip/ip_addr.h"
#include "lwip/def.h"
#include <string.h>
#if LWIP_IPV4
#include "lwip/ip4_addr.h" /* for ip6addr_aton to handle IPv4-mapped addresses */
#endif /* LWIP_IPV4 */
/* used by IP6_ADDR_ANY(6) in ip6_addr.h */
const ip_addr_t ip6_addr_any = IPADDR6_INIT(0ul, 0ul, 0ul, 0ul);
#define lwip_xchar(i) ((char)((i) < 10 ? '0' + (i) : 'A' + (i) - 10))
/**
* Check whether "cp" is a valid ascii representation
* of an IPv6 address and convert to a binary address.
* Returns 1 if the address is valid, 0 if not.
*
* @param cp IPv6 address in ascii representation (e.g. "FF01::1")
* @param addr pointer to which to save the ip address in network order
* @return 1 if cp could be converted to addr, 0 on failure
*/
int
ip6addr_aton(const char *cp, ip6_addr_t *addr)
{
u32_t addr_index, zero_blocks, current_block_index, current_block_value;
const char *s;
#if LWIP_IPV4
int check_ipv4_mapped = 0;
#endif /* LWIP_IPV4 */
/* Count the number of colons, to count the number of blocks in a "::" sequence
zero_blocks may be 1 even if there are no :: sequences */
zero_blocks = 8;
for (s = cp; *s != 0; s++) {
if (*s == ':') {
zero_blocks--;
#if LWIP_IPV4
} else if (*s == '.') {
if ((zero_blocks == 5) ||(zero_blocks == 2)) {
check_ipv4_mapped = 1;
/* last block could be the start of an IPv4 address */
zero_blocks--;
} else {
/* invalid format */
return 0;
}
break;
#endif /* LWIP_IPV4 */
} else if (!lwip_isxdigit(*s)) {
break;
}
}
/* parse each block */
addr_index = 0;
current_block_index = 0;
current_block_value = 0;
for (s = cp; *s != 0; s++) {
if (*s == ':') {
if (addr) {
if (current_block_index & 0x1) {
addr->addr[addr_index++] |= current_block_value;
}
else {
addr->addr[addr_index] = current_block_value << 16;
}
}
current_block_index++;
#if LWIP_IPV4
if (check_ipv4_mapped) {
if (current_block_index == 6) {
ip4_addr_t ip4;
int ret = ip4addr_aton(s + 1, &ip4);
if (ret) {
if (addr) {
addr->addr[3] = lwip_htonl(ip4.addr);
current_block_index++;
goto fix_byte_order_and_return;
}
return 1;
}
}
}
#endif /* LWIP_IPV4 */
current_block_value = 0;
if (current_block_index > 7) {
/* address too long! */
return 0;
}
if (s[1] == ':') {
if (s[2] == ':') {
/* invalid format: three successive colons */
return 0;
}
s++;
/* "::" found, set zeros */
while (zero_blocks > 0) {
zero_blocks--;
if (current_block_index & 0x1) {
addr_index++;
} else {
if (addr) {
addr->addr[addr_index] = 0;
}
}
current_block_index++;
if (current_block_index > 7) {
/* address too long! */
return 0;
}
}
}
} else if (lwip_isxdigit(*s)) {
/* add current digit */
current_block_value = (current_block_value << 4) +
(lwip_isdigit(*s) ? (u32_t)(*s - '0') :
(u32_t)(10 + (lwip_islower(*s) ? *s - 'a' : *s - 'A')));
} else {
/* unexpected digit, space? CRLF? */
break;
}
}
if (addr) {
if (current_block_index & 0x1) {
addr->addr[addr_index++] |= current_block_value;
}
else {
addr->addr[addr_index] = current_block_value << 16;
}
#if LWIP_IPV4
fix_byte_order_and_return:
#endif
/* convert to network byte order. */
for (addr_index = 0; addr_index < 4; addr_index++) {
addr->addr[addr_index] = lwip_htonl(addr->addr[addr_index]);
}
ip6_addr_clear_zone(addr);
}
if (current_block_index != 7) {
return 0;
}
return 1;
}
/**
* Convert numeric IPv6 address into ASCII representation.
* returns ptr to static buffer; not reentrant!
*
* @param addr ip6 address in network order to convert
* @return pointer to a global static (!) buffer that holds the ASCII
* representation of addr
*/
char *
ip6addr_ntoa(const ip6_addr_t *addr)
{
static char str[40];
return ip6addr_ntoa_r(addr, str, 40);
}
/**
* Same as ipaddr_ntoa, but reentrant since a user-supplied buffer is used.
*
* @param addr ip6 address in network order to convert
* @param buf target buffer where the string is stored
* @param buflen length of buf
* @return either pointer to buf which now holds the ASCII
* representation of addr or NULL if buf was too small
*/
char *
ip6addr_ntoa_r(const ip6_addr_t *addr, char *buf, int buflen)
{
u32_t current_block_index, current_block_value, next_block_value;
s32_t i;
u8_t zero_flag, empty_block_flag;
#if LWIP_IPV4
if (ip6_addr_isipv4mappedipv6(addr)) {
/* This is an IPv4 mapped address */
ip4_addr_t addr4;
char *ret;
#define IP4MAPPED_HEADER "::FFFF:"
char *buf_ip4 = buf + sizeof(IP4MAPPED_HEADER) - 1;
int buflen_ip4 = buflen - sizeof(IP4MAPPED_HEADER) + 1;
if (buflen < (int)sizeof(IP4MAPPED_HEADER)) {
return NULL;
}
memcpy(buf, IP4MAPPED_HEADER, sizeof(IP4MAPPED_HEADER));
addr4.addr = addr->addr[3];
ret = ip4addr_ntoa_r(&addr4, buf_ip4, buflen_ip4);
if (ret != buf_ip4) {
return NULL;
}
return buf;
}
#endif /* LWIP_IPV4 */
i = 0;
empty_block_flag = 0; /* used to indicate a zero chain for "::' */
for (current_block_index = 0; current_block_index < 8; current_block_index++) {
/* get the current 16-bit block */
current_block_value = lwip_htonl(addr->addr[current_block_index >> 1]);
if ((current_block_index & 0x1) == 0) {
current_block_value = current_block_value >> 16;
}
current_block_value &= 0xffff;
/* Check for empty block. */
if (current_block_value == 0) {
if (current_block_index == 7 && empty_block_flag == 1) {
/* special case, we must render a ':' for the last block. */
buf[i++] = ':';
if (i >= buflen) {
return NULL;
}
break;
}
if (empty_block_flag == 0) {
/* generate empty block "::", but only if more than one contiguous zero block,
* according to current formatting suggestions RFC 5952. */
next_block_value = lwip_htonl(addr->addr[(current_block_index + 1) >> 1]);
if ((current_block_index & 0x1) == 0x01) {
next_block_value = next_block_value >> 16;
}
next_block_value &= 0xffff;
if (next_block_value == 0) {
empty_block_flag = 1;
buf[i++] = ':';
if (i >= buflen) {
return NULL;
}
continue; /* move on to next block. */
}
} else if (empty_block_flag == 1) {
/* move on to next block. */
continue;
}
} else if (empty_block_flag == 1) {
/* Set this flag value so we don't produce multiple empty blocks. */
empty_block_flag = 2;
}
if (current_block_index > 0) {
buf[i++] = ':';
if (i >= buflen) {
return NULL;
}
}
if ((current_block_value & 0xf000) == 0) {
zero_flag = 1;
} else {
buf[i++] = lwip_xchar(((current_block_value & 0xf000) >> 12));
zero_flag = 0;
if (i >= buflen) {
return NULL;
}
}
if (((current_block_value & 0xf00) == 0) && (zero_flag)) {
/* do nothing */
} else {
buf[i++] = lwip_xchar(((current_block_value & 0xf00) >> 8));
zero_flag = 0;
if (i >= buflen) {
return NULL;
}
}
if (((current_block_value & 0xf0) == 0) && (zero_flag)) {
/* do nothing */
}
else {
buf[i++] = lwip_xchar(((current_block_value & 0xf0) >> 4));
zero_flag = 0;
if (i >= buflen) {
return NULL;
}
}
buf[i++] = lwip_xchar((current_block_value & 0xf));
if (i >= buflen) {
return NULL;
}
}
buf[i] = 0;
return buf;
}
#endif /* LWIP_IPV6 */

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core/ipv6/ip6_frag.c Executable file
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/**
* @file
*
* IPv6 fragmentation and reassembly.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Ivan Delamer <delamer@inicotech.com>
*
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
#include "lwip/opt.h"
#include "lwip/ip6_frag.h"
#include "lwip/ip6.h"
#include "lwip/icmp6.h"
#include "lwip/nd6.h"
#include "lwip/ip.h"
#include "lwip/pbuf.h"
#include "lwip/memp.h"
#include "lwip/stats.h"
#include <string.h>
#if LWIP_IPV6 && LWIP_IPV6_REASS /* don't build if not configured for use in lwipopts.h */
/** Setting this to 0, you can turn off checking the fragments for overlapping
* regions. The code gets a little smaller. Only use this if you know that
* overlapping won't occur on your network! */
#ifndef IP_REASS_CHECK_OVERLAP
#define IP_REASS_CHECK_OVERLAP 1
#endif /* IP_REASS_CHECK_OVERLAP */
/** Set to 0 to prevent freeing the oldest datagram when the reassembly buffer is
* full (IP_REASS_MAX_PBUFS pbufs are enqueued). The code gets a little smaller.
* Datagrams will be freed by timeout only. Especially useful when MEMP_NUM_REASSDATA
* is set to 1, so one datagram can be reassembled at a time, only. */
#ifndef IP_REASS_FREE_OLDEST
#define IP_REASS_FREE_OLDEST 1
#endif /* IP_REASS_FREE_OLDEST */
#if IPV6_FRAG_COPYHEADER
/* The number of bytes we need to "borrow" from (i.e., overwrite in) the header
* that precedes the fragment header for reassembly pruposes. */
#define IPV6_FRAG_REQROOM ((s16_t)(sizeof(struct ip6_reass_helper) - IP6_FRAG_HLEN))
#endif
#define IP_REASS_FLAG_LASTFRAG 0x01
/** This is a helper struct which holds the starting
* offset and the ending offset of this fragment to
* easily chain the fragments.
* It has the same packing requirements as the IPv6 header, since it replaces
* the Fragment Header in memory in incoming fragments to keep
* track of the various fragments.
*/
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct ip6_reass_helper {
PACK_STRUCT_FIELD(struct pbuf *next_pbuf);
PACK_STRUCT_FIELD(u16_t start);
PACK_STRUCT_FIELD(u16_t end);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
/* static variables */
static struct ip6_reassdata *reassdatagrams;
static u16_t ip6_reass_pbufcount;
/* Forward declarations. */
static void ip6_reass_free_complete_datagram(struct ip6_reassdata *ipr);
#if IP_REASS_FREE_OLDEST
static void ip6_reass_remove_oldest_datagram(struct ip6_reassdata *ipr, int pbufs_needed);
#endif /* IP_REASS_FREE_OLDEST */
void
ip6_reass_tmr(void)
{
struct ip6_reassdata *r, *tmp;
#if !IPV6_FRAG_COPYHEADER
LWIP_ASSERT("sizeof(struct ip6_reass_helper) <= IP6_FRAG_HLEN, set IPV6_FRAG_COPYHEADER to 1",
sizeof(struct ip6_reass_helper) <= IP6_FRAG_HLEN);
#endif /* !IPV6_FRAG_COPYHEADER */
r = reassdatagrams;
while (r != NULL) {
/* Decrement the timer. Once it reaches 0,
* clean up the incomplete fragment assembly */
if (r->timer > 0) {
r->timer--;
r = r->next;
} else {
/* reassembly timed out */
tmp = r;
/* get the next pointer before freeing */
r = r->next;
/* free the helper struct and all enqueued pbufs */
ip6_reass_free_complete_datagram(tmp);
}
}
}
/**
* Free a datagram (struct ip6_reassdata) and all its pbufs.
* Updates the total count of enqueued pbufs (ip6_reass_pbufcount),
* sends an ICMP time exceeded packet.
*
* @param ipr datagram to free
*/
static void
ip6_reass_free_complete_datagram(struct ip6_reassdata *ipr)
{
struct ip6_reassdata *prev;
u16_t pbufs_freed = 0;
u16_t clen;
struct pbuf *p;
struct ip6_reass_helper *iprh;
#if LWIP_ICMP6
iprh = (struct ip6_reass_helper *)ipr->p->payload;
if (iprh->start == 0) {
/* The first fragment was received, send ICMP time exceeded. */
/* First, de-queue the first pbuf from r->p. */
p = ipr->p;
ipr->p = iprh->next_pbuf;
/* Restore the part that we've overwritten with our helper structure, or we
* might send garbage (and disclose a pointer) in the ICMPv6 reply. */
MEMCPY(p->payload, ipr->orig_hdr, sizeof(iprh));
/* Then, move back to the original ipv6 header (we are now pointing to Fragment header).
This cannot fail since we already checked when receiving this fragment. */
if (pbuf_header_force(p, (s16_t)((u8_t*)p->payload - (u8_t*)ipr->iphdr))) {
LWIP_ASSERT("ip6_reass_free: moving p->payload to ip6 header failed\n", 0);
}
else {
/* Reconstruct the zoned source and destination addresses, so that we do
* not end up sending the ICMP response over the wrong link. */
ip6_addr_t src_addr, dest_addr;
ip6_addr_copy_from_packed(src_addr, IPV6_FRAG_SRC(ipr));
ip6_addr_set_zone(&src_addr, ipr->src_zone);
ip6_addr_copy_from_packed(dest_addr, IPV6_FRAG_DEST(ipr));
ip6_addr_set_zone(&dest_addr, ipr->dest_zone);
/* Send the actual ICMP response. */
icmp6_time_exceeded_with_addrs(p, ICMP6_TE_FRAG, &src_addr, &dest_addr);
}
clen = pbuf_clen(p);
LWIP_ASSERT("pbufs_freed + clen <= 0xffff", pbufs_freed + clen <= 0xffff);
pbufs_freed = (u16_t)(pbufs_freed + clen);
pbuf_free(p);
}
#endif /* LWIP_ICMP6 */
/* First, free all received pbufs. The individual pbufs need to be released
separately as they have not yet been chained */
p = ipr->p;
while (p != NULL) {
struct pbuf *pcur;
iprh = (struct ip6_reass_helper *)p->payload;
pcur = p;
/* get the next pointer before freeing */
p = iprh->next_pbuf;
clen = pbuf_clen(pcur);
LWIP_ASSERT("pbufs_freed + clen <= 0xffff", pbufs_freed + clen <= 0xffff);
pbufs_freed = (u16_t)(pbufs_freed + clen);
pbuf_free(pcur);
}
/* Then, unchain the struct ip6_reassdata from the list and free it. */
if (ipr == reassdatagrams) {
reassdatagrams = ipr->next;
} else {
prev = reassdatagrams;
while (prev != NULL) {
if (prev->next == ipr) {
break;
}
prev = prev->next;
}
if (prev != NULL) {
prev->next = ipr->next;
}
}
memp_free(MEMP_IP6_REASSDATA, ipr);
/* Finally, update number of pbufs in reassembly queue */
LWIP_ASSERT("ip_reass_pbufcount >= clen", ip6_reass_pbufcount >= pbufs_freed);
ip6_reass_pbufcount = (u16_t)(ip6_reass_pbufcount - pbufs_freed);
}
#if IP_REASS_FREE_OLDEST
/**
* Free the oldest datagram to make room for enqueueing new fragments.
* The datagram ipr is not freed!
*
* @param ipr ip6_reassdata for the current fragment
* @param pbufs_needed number of pbufs needed to enqueue
* (used for freeing other datagrams if not enough space)
*/
static void
ip6_reass_remove_oldest_datagram(struct ip6_reassdata *ipr, int pbufs_needed)
{
struct ip6_reassdata *r, *oldest;
/* Free datagrams until being allowed to enqueue 'pbufs_needed' pbufs,
* but don't free the current datagram! */
do {
r = oldest = reassdatagrams;
while (r != NULL) {
if (r != ipr) {
if (r->timer <= oldest->timer) {
/* older than the previous oldest */
oldest = r;
}
}
r = r->next;
}
if (oldest == ipr) {
/* nothing to free, ipr is the only element on the list */
return;
}
if (oldest != NULL) {
ip6_reass_free_complete_datagram(oldest);
}
} while (((ip6_reass_pbufcount + pbufs_needed) > IP_REASS_MAX_PBUFS) && (reassdatagrams != NULL));
}
#endif /* IP_REASS_FREE_OLDEST */
/**
* Reassembles incoming IPv6 fragments into an IPv6 datagram.
*
* @param p points to the IPv6 Fragment Header
* @return NULL if reassembly is incomplete, pbuf pointing to
* IPv6 Header if reassembly is complete
*/
struct pbuf *
ip6_reass(struct pbuf *p)
{
struct ip6_reassdata *ipr, *ipr_prev;
struct ip6_reass_helper *iprh, *iprh_tmp, *iprh_prev=NULL;
struct ip6_frag_hdr *frag_hdr;
u16_t offset, len, start, end;
ptrdiff_t hdrdiff;
u16_t clen;
u8_t valid = 1;
struct pbuf *q, *next_pbuf;
IP6_FRAG_STATS_INC(ip6_frag.recv);
/* ip6_frag_hdr must be in the first pbuf, not chained. Checked by caller. */
LWIP_ASSERT("IPv6 fragment header does not fit in first pbuf",
p->len >= sizeof(struct ip6_frag_hdr));
frag_hdr = (struct ip6_frag_hdr *) p->payload;
clen = pbuf_clen(p);
offset = lwip_ntohs(frag_hdr->_fragment_offset);
/* Calculate fragment length from IPv6 payload length.
* Adjust for headers before Fragment Header.
* And finally adjust by Fragment Header length. */
len = lwip_ntohs(ip6_current_header()->_plen);
hdrdiff = (u8_t*)p->payload - (const u8_t*)ip6_current_header();
LWIP_ASSERT("not a valid pbuf (ip6_input check missing?)", hdrdiff <= 0xFFFF);
LWIP_ASSERT("not a valid pbuf (ip6_input check missing?)", hdrdiff >= IP6_HLEN);
hdrdiff -= IP6_HLEN;
hdrdiff += IP6_FRAG_HLEN;
if (hdrdiff > len) {
IP6_FRAG_STATS_INC(ip6_frag.proterr);
goto nullreturn;
}
len = (u16_t)(len - hdrdiff);
start = (offset & IP6_FRAG_OFFSET_MASK);
if (start > (0xFFFF - len)) {
/* u16_t overflow, cannot handle this */
IP6_FRAG_STATS_INC(ip6_frag.proterr);
goto nullreturn;
}
/* Look for the datagram the fragment belongs to in the current datagram queue,
* remembering the previous in the queue for later dequeueing. */
for (ipr = reassdatagrams, ipr_prev = NULL; ipr != NULL; ipr = ipr->next) {
/* Check if the incoming fragment matches the one currently present
in the reassembly buffer. If so, we proceed with copying the
fragment into the buffer. */
if ((frag_hdr->_identification == ipr->identification) &&
ip6_addr_cmp_packed(ip6_current_src_addr(), &(IPV6_FRAG_SRC(ipr)), ipr->src_zone) &&
ip6_addr_cmp_packed(ip6_current_dest_addr(), &(IPV6_FRAG_DEST(ipr)), ipr->dest_zone)) {
IP6_FRAG_STATS_INC(ip6_frag.cachehit);
break;
}
ipr_prev = ipr;
}
if (ipr == NULL) {
/* Enqueue a new datagram into the datagram queue */
ipr = (struct ip6_reassdata *)memp_malloc(MEMP_IP6_REASSDATA);
if (ipr == NULL) {
#if IP_REASS_FREE_OLDEST
/* Make room and try again. */
ip6_reass_remove_oldest_datagram(ipr, clen);
ipr = (struct ip6_reassdata *)memp_malloc(MEMP_IP6_REASSDATA);
if (ipr != NULL) {
/* re-search ipr_prev since it might have been removed */
for (ipr_prev = reassdatagrams; ipr_prev != NULL; ipr_prev = ipr_prev->next) {
if (ipr_prev->next == ipr) {
break;
}
}
} else
#endif /* IP_REASS_FREE_OLDEST */
{
IP6_FRAG_STATS_INC(ip6_frag.memerr);
goto nullreturn;
}
}
memset(ipr, 0, sizeof(struct ip6_reassdata));
ipr->timer = IPV6_REASS_MAXAGE;
/* enqueue the new structure to the front of the list */
ipr->next = reassdatagrams;
reassdatagrams = ipr;
/* Use the current IPv6 header for src/dest address reference.
* Eventually, we will replace it when we get the first fragment
* (it might be this one, in any case, it is done later). */
/* need to use the none-const pointer here: */
ipr->iphdr = ip_data.current_ip6_header;
#if IPV6_FRAG_COPYHEADER
MEMCPY(&ipr->src, &ip6_current_header()->src, sizeof(ipr->src));
MEMCPY(&ipr->dest, &ip6_current_header()->dest, sizeof(ipr->dest));
#endif /* IPV6_FRAG_COPYHEADER */
#if LWIP_IPV6_SCOPES
/* Also store the address zone information.
* @todo It is possible that due to netif destruction and recreation, the
* stored zones end up resolving to a different interface. In that case, we
* risk sending a "time exceeded" ICMP response over the wrong link.
* Ideally, netif destruction would clean up matching pending reassembly
* structures, but custom zone mappings would make that non-trivial. */
ipr->src_zone = ip6_addr_zone(ip6_current_src_addr());
ipr->dest_zone = ip6_addr_zone(ip6_current_dest_addr());
#endif /* LWIP_IPV6_SCOPES */
/* copy the fragmented packet id. */
ipr->identification = frag_hdr->_identification;
/* copy the nexth field */
ipr->nexth = frag_hdr->_nexth;
}
/* Check if we are allowed to enqueue more datagrams. */
if ((ip6_reass_pbufcount + clen) > IP_REASS_MAX_PBUFS) {
#if IP_REASS_FREE_OLDEST
ip6_reass_remove_oldest_datagram(ipr, clen);
if ((ip6_reass_pbufcount + clen) <= IP_REASS_MAX_PBUFS) {
/* re-search ipr_prev since it might have been removed */
for (ipr_prev = reassdatagrams; ipr_prev != NULL; ipr_prev = ipr_prev->next) {
if (ipr_prev->next == ipr) {
break;
}
}
} else
#endif /* IP_REASS_FREE_OLDEST */
{
/* @todo: send ICMPv6 time exceeded here? */
/* drop this pbuf */
IP6_FRAG_STATS_INC(ip6_frag.memerr);
goto nullreturn;
}
}
/* Overwrite Fragment Header with our own helper struct. */
#if IPV6_FRAG_COPYHEADER
if (IPV6_FRAG_REQROOM > 0) {
/* Make room for struct ip6_reass_helper (only required if sizeof(void*) > 4).
This cannot fail since we already checked when receiving this fragment. */
u8_t hdrerr = pbuf_header_force(p, IPV6_FRAG_REQROOM);
LWIP_UNUSED_ARG(hdrerr); /* in case of LWIP_NOASSERT */
LWIP_ASSERT("no room for struct ip6_reass_helper", hdrerr == 0);
}
#else /* IPV6_FRAG_COPYHEADER */
LWIP_ASSERT("sizeof(struct ip6_reass_helper) <= IP6_FRAG_HLEN, set IPV6_FRAG_COPYHEADER to 1",
sizeof(struct ip6_reass_helper) <= IP6_FRAG_HLEN);
#endif /* IPV6_FRAG_COPYHEADER */
/* Prepare the pointer to the helper structure, and its initial values.
* Do not yet write to the structure itself, as we still have to make a
* backup of the original data, and we should not do that until we know for
* sure that we are going to add this packet to the list. */
iprh = (struct ip6_reass_helper *)p->payload;
next_pbuf = NULL;
end = (u16_t)(start + len);
/* find the right place to insert this pbuf */
/* Iterate through until we either get to the end of the list (append),
* or we find on with a larger offset (insert). */
for (q = ipr->p; q != NULL;) {
iprh_tmp = (struct ip6_reass_helper*)q->payload;
if (start < iprh_tmp->start) {
#if IP_REASS_CHECK_OVERLAP
if (end > iprh_tmp->start) {
/* fragment overlaps with following, throw away */
IP6_FRAG_STATS_INC(ip6_frag.proterr);
goto nullreturn;
}
if (iprh_prev != NULL) {
if (start < iprh_prev->end) {
/* fragment overlaps with previous, throw away */
IP6_FRAG_STATS_INC(ip6_frag.proterr);
goto nullreturn;
}
}
#endif /* IP_REASS_CHECK_OVERLAP */
/* the new pbuf should be inserted before this */
next_pbuf = q;
if (iprh_prev != NULL) {
/* not the fragment with the lowest offset */
iprh_prev->next_pbuf = p;
} else {
/* fragment with the lowest offset */
ipr->p = p;
}
break;
} else if (start == iprh_tmp->start) {
/* received the same datagram twice: no need to keep the datagram */
goto nullreturn;
#if IP_REASS_CHECK_OVERLAP
} else if (start < iprh_tmp->end) {
/* overlap: no need to keep the new datagram */
IP6_FRAG_STATS_INC(ip6_frag.proterr);
goto nullreturn;
#endif /* IP_REASS_CHECK_OVERLAP */
} else {
/* Check if the fragments received so far have no gaps. */
if (iprh_prev != NULL) {
if (iprh_prev->end != iprh_tmp->start) {
/* There is a fragment missing between the current
* and the previous fragment */
valid = 0;
}
}
}
q = iprh_tmp->next_pbuf;
iprh_prev = iprh_tmp;
}
/* If q is NULL, then we made it to the end of the list. Determine what to do now */
if (q == NULL) {
if (iprh_prev != NULL) {
/* this is (for now), the fragment with the highest offset:
* chain it to the last fragment */
#if IP_REASS_CHECK_OVERLAP
LWIP_ASSERT("check fragments don't overlap", iprh_prev->end <= start);
#endif /* IP_REASS_CHECK_OVERLAP */
iprh_prev->next_pbuf = p;
if (iprh_prev->end != start) {
valid = 0;
}
} else {
#if IP_REASS_CHECK_OVERLAP
LWIP_ASSERT("no previous fragment, this must be the first fragment!",
ipr->p == NULL);
#endif /* IP_REASS_CHECK_OVERLAP */
/* this is the first fragment we ever received for this ip datagram */
ipr->p = p;
}
}
/* Track the current number of pbufs current 'in-flight', in order to limit
the number of fragments that may be enqueued at any one time */
ip6_reass_pbufcount = (u16_t)(ip6_reass_pbufcount + clen);
/* Remember IPv6 header if this is the first fragment. */
if (start == 0) {
/* need to use the none-const pointer here: */
ipr->iphdr = ip_data.current_ip6_header;
/* Make a backup of the part of the packet data that we are about to
* overwrite, so that we can restore the original later. */
MEMCPY(ipr->orig_hdr, p->payload, sizeof(*iprh));
/* For IPV6_FRAG_COPYHEADER there is no need to copy src/dst again, as they
* will be the same as they were. With LWIP_IPV6_SCOPES, the same applies
* to the source/destination zones. */
}
/* Only after the backup do we get to fill in the actual helper structure. */
iprh->next_pbuf = next_pbuf;
iprh->start = start;
iprh->end = end;
/* If this is the last fragment, calculate total packet length. */
if ((offset & IP6_FRAG_MORE_FLAG) == 0) {
ipr->datagram_len = iprh->end;
}
/* Additional validity tests: we have received first and last fragment. */
iprh_tmp = (struct ip6_reass_helper*)ipr->p->payload;
if (iprh_tmp->start != 0) {
valid = 0;
}
if (ipr->datagram_len == 0) {
valid = 0;
}
/* Final validity test: no gaps between current and last fragment. */
iprh_prev = iprh;
q = iprh->next_pbuf;
while ((q != NULL) && valid) {
iprh = (struct ip6_reass_helper*)q->payload;
if (iprh_prev->end != iprh->start) {
valid = 0;
break;
}
iprh_prev = iprh;
q = iprh->next_pbuf;
}
if (valid) {
/* All fragments have been received */
struct ip6_hdr* iphdr_ptr;
/* chain together the pbufs contained within the ip6_reassdata list. */
iprh = (struct ip6_reass_helper*) ipr->p->payload;
while (iprh != NULL) {
next_pbuf = iprh->next_pbuf;
if (next_pbuf != NULL) {
/* Save next helper struct (will be hidden in next step). */
iprh_tmp = (struct ip6_reass_helper*)next_pbuf->payload;
/* hide the fragment header for every succeeding fragment */
pbuf_remove_header(next_pbuf, IP6_FRAG_HLEN);
#if IPV6_FRAG_COPYHEADER
if (IPV6_FRAG_REQROOM > 0) {
/* hide the extra bytes borrowed from ip6_hdr for struct ip6_reass_helper */
u8_t hdrerr = pbuf_remove_header(next_pbuf, IPV6_FRAG_REQROOM);
LWIP_UNUSED_ARG(hdrerr); /* in case of LWIP_NOASSERT */
LWIP_ASSERT("no room for struct ip6_reass_helper", hdrerr == 0);
}
#endif
pbuf_cat(ipr->p, next_pbuf);
}
else {
iprh_tmp = NULL;
}
iprh = iprh_tmp;
}
/* Get the first pbuf. */
p = ipr->p;
#if IPV6_FRAG_COPYHEADER
if (IPV6_FRAG_REQROOM > 0) {
u8_t hdrerr;
/* Restore (only) the bytes that we overwrote beyond the fragment header.
* Those bytes may belong to either the IPv6 header or an extension
* header placed before the fragment header. */
MEMCPY(p->payload, ipr->orig_hdr, IPV6_FRAG_REQROOM);
/* get back room for struct ip6_reass_helper (only required if sizeof(void*) > 4) */
hdrerr = pbuf_remove_header(p, IPV6_FRAG_REQROOM);
LWIP_UNUSED_ARG(hdrerr); /* in case of LWIP_NOASSERT */
LWIP_ASSERT("no room for struct ip6_reass_helper", hdrerr == 0);
}
#endif
/* We need to get rid of the fragment header itself, which is somewhere in
* the middle of the packet (but still in the first pbuf of the chain).
* Getting rid of the header is required by RFC 2460 Sec. 4.5 and necessary
* in order to be able to reassemble packets that are close to full size
* (i.e., around 65535 bytes). We simply move up all the headers before the
* fragment header, including the IPv6 header, and adjust the payload start
* accordingly. This works because all these headers are in the first pbuf
* of the chain, and because the caller adjusts all its pointers on
* successful reassembly. */
MEMMOVE((u8_t*)ipr->iphdr + sizeof(struct ip6_frag_hdr), ipr->iphdr,
(size_t)((u8_t*)p->payload - (u8_t*)ipr->iphdr));
/* This is where the IPv6 header is now. */
iphdr_ptr = (struct ip6_hdr*)((u8_t*)ipr->iphdr +
sizeof(struct ip6_frag_hdr));
/* Adjust datagram length by adding header lengths. */
ipr->datagram_len = (u16_t)(ipr->datagram_len + ((u8_t*)p->payload - (u8_t*)iphdr_ptr)
- IP6_HLEN);
/* Set payload length in ip header. */
iphdr_ptr->_plen = lwip_htons(ipr->datagram_len);
/* With the fragment header gone, we now need to adjust the next-header
* field of whatever header was originally before it. Since the packet made
* it through the original header processing routines at least up to the
* fragment header, we do not need any further sanity checks here. */
if (IP6H_NEXTH(iphdr_ptr) == IP6_NEXTH_FRAGMENT) {
iphdr_ptr->_nexth = ipr->nexth;
} else {
u8_t *ptr = (u8_t *)iphdr_ptr + IP6_HLEN;
while (*ptr != IP6_NEXTH_FRAGMENT) {
ptr += 8 * (1 + ptr[1]);
}
*ptr = ipr->nexth;
}
/* release the resources allocated for the fragment queue entry */
if (reassdatagrams == ipr) {
/* it was the first in the list */
reassdatagrams = ipr->next;
} else {
/* it wasn't the first, so it must have a valid 'prev' */
LWIP_ASSERT("sanity check linked list", ipr_prev != NULL);
ipr_prev->next = ipr->next;
}
memp_free(MEMP_IP6_REASSDATA, ipr);
/* adjust the number of pbufs currently queued for reassembly. */
clen = pbuf_clen(p);
LWIP_ASSERT("ip6_reass_pbufcount >= clen", ip6_reass_pbufcount >= clen);
ip6_reass_pbufcount = (u16_t)(ip6_reass_pbufcount - clen);
/* Move pbuf back to IPv6 header. This should never fail. */
if (pbuf_header_force(p, (s16_t)((u8_t*)p->payload - (u8_t*)iphdr_ptr))) {
LWIP_ASSERT("ip6_reass: moving p->payload to ip6 header failed\n", 0);
pbuf_free(p);
return NULL;
}
/* Return the pbuf chain */
return p;
}
/* the datagram is not (yet?) reassembled completely */
return NULL;
nullreturn:
IP6_FRAG_STATS_INC(ip6_frag.drop);
pbuf_free(p);
return NULL;
}
#endif /* LWIP_IPV6 && LWIP_IPV6_REASS */
#if LWIP_IPV6 && LWIP_IPV6_FRAG
#if !LWIP_NETIF_TX_SINGLE_PBUF
/** Allocate a new struct pbuf_custom_ref */
static struct pbuf_custom_ref*
ip6_frag_alloc_pbuf_custom_ref(void)
{
return (struct pbuf_custom_ref*)memp_malloc(MEMP_FRAG_PBUF);
}
/** Free a struct pbuf_custom_ref */
static void
ip6_frag_free_pbuf_custom_ref(struct pbuf_custom_ref* p)
{
LWIP_ASSERT("p != NULL", p != NULL);
memp_free(MEMP_FRAG_PBUF, p);
}
/** Free-callback function to free a 'struct pbuf_custom_ref', called by
* pbuf_free. */
static void
ip6_frag_free_pbuf_custom(struct pbuf *p)
{
struct pbuf_custom_ref *pcr = (struct pbuf_custom_ref*)p;
LWIP_ASSERT("pcr != NULL", pcr != NULL);
LWIP_ASSERT("pcr == p", (void*)pcr == (void*)p);
if (pcr->original != NULL) {
pbuf_free(pcr->original);
}
ip6_frag_free_pbuf_custom_ref(pcr);
}
#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */
/**
* Fragment an IPv6 datagram if too large for the netif or path MTU.
*
* Chop the datagram in MTU sized chunks and send them in order
* by pointing PBUF_REFs into p
*
* @param p ipv6 packet to send
* @param netif the netif on which to send
* @param dest destination ipv6 address to which to send
*
* @return ERR_OK if sent successfully, err_t otherwise
*/
err_t
ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest)
{
struct ip6_hdr *original_ip6hdr;
struct ip6_hdr *ip6hdr;
struct ip6_frag_hdr *frag_hdr;
struct pbuf *rambuf;
#if !LWIP_NETIF_TX_SINGLE_PBUF
struct pbuf *newpbuf;
u16_t newpbuflen = 0;
u16_t left_to_copy;
#endif
static u32_t identification;
u16_t left, cop;
const u16_t mtu = nd6_get_destination_mtu(dest, netif);
const u16_t nfb = (u16_t)((mtu - (IP6_HLEN + IP6_FRAG_HLEN)) & IP6_FRAG_OFFSET_MASK);
u16_t fragment_offset = 0;
u16_t last;
u16_t poff = IP6_HLEN;
identification++;
original_ip6hdr = (struct ip6_hdr *)p->payload;
/* @todo we assume there are no options in the unfragmentable part (IPv6 header). */
LWIP_ASSERT("p->tot_len >= IP6_HLEN", p->tot_len >= IP6_HLEN);
left = (u16_t)(p->tot_len - IP6_HLEN);
while (left) {
last = (left <= nfb);
/* Fill this fragment */
cop = last ? left : nfb;
#if LWIP_NETIF_TX_SINGLE_PBUF
rambuf = pbuf_alloc(PBUF_IP, cop + IP6_FRAG_HLEN, PBUF_RAM);
if (rambuf == NULL) {
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(rambuf->len == rambuf->tot_len) && (rambuf->next == NULL));
poff += pbuf_copy_partial(p, (u8_t*)rambuf->payload + IP6_FRAG_HLEN, cop, poff);
/* make room for the IP header */
if (pbuf_add_header(rambuf, IP6_HLEN)) {
pbuf_free(rambuf);
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
/* fill in the IP header */
SMEMCPY(rambuf->payload, original_ip6hdr, IP6_HLEN);
ip6hdr = (struct ip6_hdr *)rambuf->payload;
frag_hdr = (struct ip6_frag_hdr *)((u8_t*)rambuf->payload + IP6_HLEN);
#else
/* When not using a static buffer, create a chain of pbufs.
* The first will be a PBUF_RAM holding the link, IPv6, and Fragment header.
* The rest will be PBUF_REFs mirroring the pbuf chain to be fragged,
* but limited to the size of an mtu.
*/
rambuf = pbuf_alloc(PBUF_LINK, IP6_HLEN + IP6_FRAG_HLEN, PBUF_RAM);
if (rambuf == NULL) {
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(p->len >= (IP6_HLEN)));
SMEMCPY(rambuf->payload, original_ip6hdr, IP6_HLEN);
ip6hdr = (struct ip6_hdr *)rambuf->payload;
frag_hdr = (struct ip6_frag_hdr *)((u8_t*)rambuf->payload + IP6_HLEN);
/* Can just adjust p directly for needed offset. */
p->payload = (u8_t *)p->payload + poff;
p->len = (u16_t)(p->len - poff);
p->tot_len = (u16_t)(p->tot_len - poff);
left_to_copy = cop;
while (left_to_copy) {
struct pbuf_custom_ref *pcr;
newpbuflen = (left_to_copy < p->len) ? left_to_copy : p->len;
/* Is this pbuf already empty? */
if (!newpbuflen) {
p = p->next;
continue;
}
pcr = ip6_frag_alloc_pbuf_custom_ref();
if (pcr == NULL) {
pbuf_free(rambuf);
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
/* Mirror this pbuf, although we might not need all of it. */
newpbuf = pbuf_alloced_custom(PBUF_RAW, newpbuflen, PBUF_REF, &pcr->pc, p->payload, newpbuflen);
if (newpbuf == NULL) {
ip6_frag_free_pbuf_custom_ref(pcr);
pbuf_free(rambuf);
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
pbuf_ref(p);
pcr->original = p;
pcr->pc.custom_free_function = ip6_frag_free_pbuf_custom;
/* Add it to end of rambuf's chain, but using pbuf_cat, not pbuf_chain
* so that it is removed when pbuf_dechain is later called on rambuf.
*/
pbuf_cat(rambuf, newpbuf);
left_to_copy = (u16_t)(left_to_copy - newpbuflen);
if (left_to_copy) {
p = p->next;
}
}
poff = newpbuflen;
#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
/* Set headers */
frag_hdr->_nexth = original_ip6hdr->_nexth;
frag_hdr->reserved = 0;
frag_hdr->_fragment_offset = lwip_htons((u16_t)((fragment_offset & IP6_FRAG_OFFSET_MASK) | (last ? 0 : IP6_FRAG_MORE_FLAG)));
frag_hdr->_identification = lwip_htonl(identification);
IP6H_NEXTH_SET(ip6hdr, IP6_NEXTH_FRAGMENT);
IP6H_PLEN_SET(ip6hdr, (u16_t)(cop + IP6_FRAG_HLEN));
/* No need for separate header pbuf - we allowed room for it in rambuf
* when allocated.
*/
IP6_FRAG_STATS_INC(ip6_frag.xmit);
netif->output_ip6(netif, rambuf, dest);
/* Unfortunately we can't reuse rambuf - the hardware may still be
* using the buffer. Instead we free it (and the ensuing chain) and
* recreate it next time round the loop. If we're lucky the hardware
* will have already sent the packet, the free will really free, and
* there will be zero memory penalty.
*/
pbuf_free(rambuf);
left = (u16_t)(left - cop);
fragment_offset = (u16_t)(fragment_offset + cop);
}
return ERR_OK;
}
#endif /* LWIP_IPV6 && LWIP_IPV6_FRAG */

626
core/ipv6/mld6.c Executable file
View File

@ -0,0 +1,626 @@
/**
* @file
* Multicast listener discovery
*
* @defgroup mld6 MLD6
* @ingroup ip6
* Multicast listener discovery for IPv6. Aims to be compliant with RFC 2710.
* No support for MLDv2.\n
* Note: The allnodes (ff01::1, ff02::1) group is assumed be received by your
* netif since it must always be received for correct IPv6 operation (e.g. SLAAC).
* Ensure the netif filters are configured accordingly!\n
* The netif flags also need NETIF_FLAG_MLD6 flag set to enable MLD6 on a
* netif ("netif->flags |= NETIF_FLAG_MLD6;").\n
* To be called from TCPIP thread.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Ivan Delamer <delamer@inicotech.com>
*
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
/* Based on igmp.c implementation of igmp v2 protocol */
#include "lwip/opt.h"
#if LWIP_IPV6 && LWIP_IPV6_MLD /* don't build if not configured for use in lwipopts.h */
#include "lwip/mld6.h"
#include "lwip/prot/mld6.h"
#include "lwip/icmp6.h"
#include "lwip/ip6.h"
#include "lwip/ip6_addr.h"
#include "lwip/ip.h"
#include "lwip/inet_chksum.h"
#include "lwip/pbuf.h"
#include "lwip/netif.h"
#include "lwip/memp.h"
#include "lwip/stats.h"
#include <string.h>
/*
* MLD constants
*/
#define MLD6_HL 1
#define MLD6_JOIN_DELAYING_MEMBER_TMR_MS (500)
#define MLD6_GROUP_NON_MEMBER 0
#define MLD6_GROUP_DELAYING_MEMBER 1
#define MLD6_GROUP_IDLE_MEMBER 2
/* Forward declarations. */
static struct mld_group *mld6_new_group(struct netif *ifp, const ip6_addr_t *addr);
static err_t mld6_remove_group(struct netif *netif, struct mld_group *group);
static void mld6_delayed_report(struct mld_group *group, u16_t maxresp);
static void mld6_send(struct netif *netif, struct mld_group *group, u8_t type);
/**
* Stop MLD processing on interface
*
* @param netif network interface on which stop MLD processing
*/
err_t
mld6_stop(struct netif *netif)
{
struct mld_group *group = netif_mld6_data(netif);
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6, NULL);
while (group != NULL) {
struct mld_group *next = group->next; /* avoid use-after-free below */
/* disable the group at the MAC level */
if (netif->mld_mac_filter != NULL) {
netif->mld_mac_filter(netif, &(group->group_address), NETIF_DEL_MAC_FILTER);
}
/* free group */
memp_free(MEMP_MLD6_GROUP, group);
/* move to "next" */
group = next;
}
return ERR_OK;
}
/**
* Report MLD memberships for this interface
*
* @param netif network interface on which report MLD memberships
*/
void
mld6_report_groups(struct netif *netif)
{
struct mld_group *group = netif_mld6_data(netif);
while (group != NULL) {
mld6_delayed_report(group, MLD6_JOIN_DELAYING_MEMBER_TMR_MS);
group = group->next;
}
}
/**
* Search for a group that is joined on a netif
*
* @param ifp the network interface for which to look
* @param addr the group ipv6 address to search for
* @return a struct mld_group* if the group has been found,
* NULL if the group wasn't found.
*/
struct mld_group *
mld6_lookfor_group(struct netif *ifp, const ip6_addr_t *addr)
{
struct mld_group *group = netif_mld6_data(ifp);
while (group != NULL) {
if (ip6_addr_cmp(&(group->group_address), addr)) {
return group;
}
group = group->next;
}
return NULL;
}
/**
* create a new group
*
* @param ifp the network interface for which to create
* @param addr the new group ipv6
* @return a struct mld_group*,
* NULL on memory error.
*/
static struct mld_group *
mld6_new_group(struct netif *ifp, const ip6_addr_t *addr)
{
struct mld_group *group;
group = (struct mld_group *)memp_malloc(MEMP_MLD6_GROUP);
if (group != NULL) {
ip6_addr_set(&(group->group_address), addr);
group->timer = 0; /* Not running */
group->group_state = MLD6_GROUP_IDLE_MEMBER;
group->last_reporter_flag = 0;
group->use = 0;
group->next = netif_mld6_data(ifp);
netif_set_client_data(ifp, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6, group);
}
return group;
}
/**
* Remove a group from the mld_group_list, but do not free it yet
*
* @param group the group to remove
* @return ERR_OK if group was removed from the list, an err_t otherwise
*/
static err_t
mld6_remove_group(struct netif *netif, struct mld_group *group)
{
err_t err = ERR_OK;
/* Is it the first group? */
if (netif_mld6_data(netif) == group) {
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6, group->next);
} else {
/* look for group further down the list */
struct mld_group *tmpGroup;
for (tmpGroup = netif_mld6_data(netif); tmpGroup != NULL; tmpGroup = tmpGroup->next) {
if (tmpGroup->next == group) {
tmpGroup->next = group->next;
break;
}
}
/* Group not find group */
if (tmpGroup == NULL) {
err = ERR_ARG;
}
}
return err;
}
/**
* Process an input MLD message. Called by icmp6_input.
*
* @param p the mld packet, p->payload pointing to the icmpv6 header
* @param inp the netif on which this packet was received
*/
void
mld6_input(struct pbuf *p, struct netif *inp)
{
struct mld_header *mld_hdr;
struct mld_group *group;
MLD6_STATS_INC(mld6.recv);
/* Check that mld header fits in packet. */
if (p->len < sizeof(struct mld_header)) {
/* @todo debug message */
pbuf_free(p);
MLD6_STATS_INC(mld6.lenerr);
MLD6_STATS_INC(mld6.drop);
return;
}
mld_hdr = (struct mld_header *)p->payload;
switch (mld_hdr->type) {
case ICMP6_TYPE_MLQ: /* Multicast listener query. */
/* Is it a general query? */
if (ip6_addr_isallnodes_linklocal(ip6_current_dest_addr()) &&
ip6_addr_isany(&(mld_hdr->multicast_address))) {
MLD6_STATS_INC(mld6.rx_general);
/* Report all groups, except all nodes group, and if-local groups. */
group = netif_mld6_data(inp);
while (group != NULL) {
if ((!(ip6_addr_ismulticast_iflocal(&(group->group_address)))) &&
(!(ip6_addr_isallnodes_linklocal(&(group->group_address))))) {
mld6_delayed_report(group, mld_hdr->max_resp_delay);
}
group = group->next;
}
} else {
/* Have we joined this group?
* We use IP6 destination address to have a memory aligned copy.
* mld_hdr->multicast_address should be the same. */
MLD6_STATS_INC(mld6.rx_group);
group = mld6_lookfor_group(inp, ip6_current_dest_addr());
if (group != NULL) {
/* Schedule a report. */
mld6_delayed_report(group, mld_hdr->max_resp_delay);
}
}
break; /* ICMP6_TYPE_MLQ */
case ICMP6_TYPE_MLR: /* Multicast listener report. */
/* Have we joined this group?
* We use IP6 destination address to have a memory aligned copy.
* mld_hdr->multicast_address should be the same. */
MLD6_STATS_INC(mld6.rx_report);
group = mld6_lookfor_group(inp, ip6_current_dest_addr());
if (group != NULL) {
/* If we are waiting to report, cancel it. */
if (group->group_state == MLD6_GROUP_DELAYING_MEMBER) {
group->timer = 0; /* stopped */
group->group_state = MLD6_GROUP_IDLE_MEMBER;
group->last_reporter_flag = 0;
}
}
break; /* ICMP6_TYPE_MLR */
case ICMP6_TYPE_MLD: /* Multicast listener done. */
/* Do nothing, router will query us. */
break; /* ICMP6_TYPE_MLD */
default:
MLD6_STATS_INC(mld6.proterr);
MLD6_STATS_INC(mld6.drop);
break;
}
pbuf_free(p);
}
/**
* @ingroup mld6
* Join a group on one or all network interfaces.
*
* If the group is to be joined on all interfaces, the given group address must
* not have a zone set (i.e., it must have its zone index set to IP6_NO_ZONE).
* If the group is to be joined on one particular interface, the given group
* address may or may not have a zone set.
*
* @param srcaddr ipv6 address (zoned) of the network interface which should
* join a new group. If IP6_ADDR_ANY6, join on all netifs
* @param groupaddr the ipv6 address of the group to join (possibly but not
* necessarily zoned)
* @return ERR_OK if group was joined on the netif(s), an err_t otherwise
*/
err_t
mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr)
{
err_t err = ERR_VAL; /* no matching interface */
struct netif *netif;
LWIP_ASSERT_CORE_LOCKED();
/* loop through netif's */
NETIF_FOREACH(netif) {
/* Should we join this interface ? */
if (ip6_addr_isany(srcaddr) ||
netif_get_ip6_addr_match(netif, srcaddr) >= 0) {
err = mld6_joingroup_netif(netif, groupaddr);
if (err != ERR_OK) {
return err;
}
}
}
return err;
}
/**
* @ingroup mld6
* Join a group on a network interface.
*
* @param netif the network interface which should join a new group.
* @param groupaddr the ipv6 address of the group to join (possibly but not
* necessarily zoned)
* @return ERR_OK if group was joined on the netif, an err_t otherwise
*/
err_t
mld6_joingroup_netif(struct netif *netif, const ip6_addr_t *groupaddr)
{
struct mld_group *group;
#if LWIP_IPV6_SCOPES
ip6_addr_t ip6addr;
/* If the address has a particular scope but no zone set, use the netif to
* set one now. Within the mld6 module, all addresses are properly zoned. */
if (ip6_addr_lacks_zone(groupaddr, IP6_MULTICAST)) {
ip6_addr_set(&ip6addr, groupaddr);
ip6_addr_assign_zone(&ip6addr, IP6_MULTICAST, netif);
groupaddr = &ip6addr;
}
IP6_ADDR_ZONECHECK_NETIF(groupaddr, netif);
#endif /* LWIP_IPV6_SCOPES */
LWIP_ASSERT_CORE_LOCKED();
/* find group or create a new one if not found */
group = mld6_lookfor_group(netif, groupaddr);
if (group == NULL) {
/* Joining a new group. Create a new group entry. */
group = mld6_new_group(netif, groupaddr);
if (group == NULL) {
return ERR_MEM;
}
/* Activate this address on the MAC layer. */
if (netif->mld_mac_filter != NULL) {
netif->mld_mac_filter(netif, groupaddr, NETIF_ADD_MAC_FILTER);
}
/* Report our membership. */
MLD6_STATS_INC(mld6.tx_report);
mld6_send(netif, group, ICMP6_TYPE_MLR);
mld6_delayed_report(group, MLD6_JOIN_DELAYING_MEMBER_TMR_MS);
}
/* Increment group use */
group->use++;
return ERR_OK;
}
/**
* @ingroup mld6
* Leave a group on a network interface.
*
* Zoning of address follows the same rules as @ref mld6_joingroup.
*
* @param srcaddr ipv6 address (zoned) of the network interface which should
* leave the group. If IP6_ADDR_ANY6, leave on all netifs
* @param groupaddr the ipv6 address of the group to leave (possibly, but not
* necessarily zoned)
* @return ERR_OK if group was left on the netif(s), an err_t otherwise
*/
err_t
mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr)
{
err_t err = ERR_VAL; /* no matching interface */
struct netif *netif;
LWIP_ASSERT_CORE_LOCKED();
/* loop through netif's */
NETIF_FOREACH(netif) {
/* Should we leave this interface ? */
if (ip6_addr_isany(srcaddr) ||
netif_get_ip6_addr_match(netif, srcaddr) >= 0) {
err_t res = mld6_leavegroup_netif(netif, groupaddr);
if (err != ERR_OK) {
/* Store this result if we have not yet gotten a success */
err = res;
}
}
}
return err;
}
/**
* @ingroup mld6
* Leave a group on a network interface.
*
* @param netif the network interface which should leave the group.
* @param groupaddr the ipv6 address of the group to leave (possibly, but not
* necessarily zoned)
* @return ERR_OK if group was left on the netif, an err_t otherwise
*/
err_t
mld6_leavegroup_netif(struct netif *netif, const ip6_addr_t *groupaddr)
{
struct mld_group *group;
#if LWIP_IPV6_SCOPES
ip6_addr_t ip6addr;
if (ip6_addr_lacks_zone(groupaddr, IP6_MULTICAST)) {
ip6_addr_set(&ip6addr, groupaddr);
ip6_addr_assign_zone(&ip6addr, IP6_MULTICAST, netif);
groupaddr = &ip6addr;
}
IP6_ADDR_ZONECHECK_NETIF(groupaddr, netif);
#endif /* LWIP_IPV6_SCOPES */
LWIP_ASSERT_CORE_LOCKED();
/* find group */
group = mld6_lookfor_group(netif, groupaddr);
if (group != NULL) {
/* Leave if there is no other use of the group */
if (group->use <= 1) {
/* Remove the group from the list */
mld6_remove_group(netif, group);
/* If we are the last reporter for this group */
if (group->last_reporter_flag) {
MLD6_STATS_INC(mld6.tx_leave);
mld6_send(netif, group, ICMP6_TYPE_MLD);
}
/* Disable the group at the MAC level */
if (netif->mld_mac_filter != NULL) {
netif->mld_mac_filter(netif, groupaddr, NETIF_DEL_MAC_FILTER);
}
/* free group struct */
memp_free(MEMP_MLD6_GROUP, group);
} else {
/* Decrement group use */
group->use--;
}
/* Left group */
return ERR_OK;
}
/* Group not found */
return ERR_VAL;
}
/**
* Periodic timer for mld processing. Must be called every
* MLD6_TMR_INTERVAL milliseconds (100).
*
* When a delaying member expires, a membership report is sent.
*/
void
mld6_tmr(void)
{
struct netif *netif;
NETIF_FOREACH(netif) {
struct mld_group *group = netif_mld6_data(netif);
while (group != NULL) {
if (group->timer > 0) {
group->timer--;
if (group->timer == 0) {
/* If the state is MLD6_GROUP_DELAYING_MEMBER then we send a report for this group */
if (group->group_state == MLD6_GROUP_DELAYING_MEMBER) {
MLD6_STATS_INC(mld6.tx_report);
mld6_send(netif, group, ICMP6_TYPE_MLR);
group->group_state = MLD6_GROUP_IDLE_MEMBER;
}
}
}
group = group->next;
}
}
}
/**
* Schedule a delayed membership report for a group
*
* @param group the mld_group for which "delaying" membership report
* should be sent
* @param maxresp_in the max resp delay provided in the query
*/
static void
mld6_delayed_report(struct mld_group *group, u16_t maxresp_in)
{
/* Convert maxresp from milliseconds to tmr ticks */
u16_t maxresp = maxresp_in / MLD6_TMR_INTERVAL;
if (maxresp == 0) {
maxresp = 1;
}
#ifdef LWIP_RAND
/* Randomize maxresp. (if LWIP_RAND is supported) */
maxresp = (u16_t)(LWIP_RAND() % maxresp);
if (maxresp == 0) {
maxresp = 1;
}
#endif /* LWIP_RAND */
/* Apply timer value if no report has been scheduled already. */
if ((group->group_state == MLD6_GROUP_IDLE_MEMBER) ||
((group->group_state == MLD6_GROUP_DELAYING_MEMBER) &&
((group->timer == 0) || (maxresp < group->timer)))) {
group->timer = maxresp;
group->group_state = MLD6_GROUP_DELAYING_MEMBER;
}
}
/**
* Send a MLD message (report or done).
*
* An IPv6 hop-by-hop options header with a router alert option
* is prepended.
*
* @param group the group to report or quit
* @param type ICMP6_TYPE_MLR (report) or ICMP6_TYPE_MLD (done)
*/
static void
mld6_send(struct netif *netif, struct mld_group *group, u8_t type)
{
struct mld_header *mld_hdr;
struct pbuf *p;
const ip6_addr_t *src_addr;
/* Allocate a packet. Size is MLD header + IPv6 Hop-by-hop options header. */
p = pbuf_alloc(PBUF_IP, sizeof(struct mld_header) + MLD6_HBH_HLEN, PBUF_RAM);
if (p == NULL) {
MLD6_STATS_INC(mld6.memerr);
return;
}
/* Move to make room for Hop-by-hop options header. */
if (pbuf_remove_header(p, MLD6_HBH_HLEN)) {
pbuf_free(p);
MLD6_STATS_INC(mld6.lenerr);
return;
}
/* Select our source address. */
if (!ip6_addr_isvalid(netif_ip6_addr_state(netif, 0))) {
/* This is a special case, when we are performing duplicate address detection.
* We must join the multicast group, but we don't have a valid address yet. */
src_addr = IP6_ADDR_ANY6;
} else {
/* Use link-local address as source address. */
src_addr = netif_ip6_addr(netif, 0);
}
/* MLD message header pointer. */
mld_hdr = (struct mld_header *)p->payload;
/* Set fields. */
mld_hdr->type = type;
mld_hdr->code = 0;
mld_hdr->chksum = 0;
mld_hdr->max_resp_delay = 0;
mld_hdr->reserved = 0;
ip6_addr_copy_to_packed(mld_hdr->multicast_address, group->group_address);
#if CHECKSUM_GEN_ICMP6
IF__NETIF_CHECKSUM_ENABLED(netif, NETIF_CHECKSUM_GEN_ICMP6) {
mld_hdr->chksum = ip6_chksum_pseudo(p, IP6_NEXTH_ICMP6, p->len,
src_addr, &(group->group_address));
}
#endif /* CHECKSUM_GEN_ICMP6 */
/* Add hop-by-hop headers options: router alert with MLD value. */
ip6_options_add_hbh_ra(p, IP6_NEXTH_ICMP6, IP6_ROUTER_ALERT_VALUE_MLD);
if (type == ICMP6_TYPE_MLR) {
/* Remember we were the last to report */
group->last_reporter_flag = 1;
}
/* Send the packet out. */
MLD6_STATS_INC(mld6.xmit);
ip6_output_if(p, (ip6_addr_isany(src_addr)) ? NULL : src_addr, &(group->group_address),
MLD6_HL, 0, IP6_NEXTH_HOPBYHOP, netif);
pbuf_free(p);
}
#endif /* LWIP_IPV6 */

2434
core/ipv6/nd6.c Executable file
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/**
* @file
* Dynamic pool memory manager
*
* lwIP has dedicated pools for many structures (netconn, protocol control blocks,
* packet buffers, ...). All these pools are managed here.
*
* @defgroup mempool Memory pools
* @ingroup infrastructure
* Custom memory pools
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#include "lwip/memp.h"
#include "lwip/sys.h"
#include "lwip/stats.h"
#include <string.h>
/* Make sure we include everything we need for size calculation required by memp_std.h */
#include "lwip/pbuf.h"
#include "lwip/raw.h"
#include "lwip/udp.h"
#include "lwip/tcp.h"
#include "lwip/priv/tcp_priv.h"
#include "lwip/altcp.h"
#include "lwip/ip4_frag.h"
#include "lwip/netbuf.h"
#include "lwip/api.h"
#include "lwip/priv/tcpip_priv.h"
#include "lwip/priv/api_msg.h"
#include "lwip/priv/sockets_priv.h"
#include "lwip/etharp.h"
#include "lwip/igmp.h"
#include "lwip/timeouts.h"
/* needed by default MEMP_NUM_SYS_TIMEOUT */
#include "netif/ppp/ppp_opts.h"
#include "lwip/netdb.h"
#include "lwip/dns.h"
#include "lwip/priv/nd6_priv.h"
#include "lwip/ip6_frag.h"
#include "lwip/mld6.h"
#define LWIP_MEMPOOL(name,num,size,desc) LWIP_MEMPOOL_DECLARE(name,num,size,desc)
#include "lwip/priv/memp_std.h"
const struct memp_desc *const memp_pools[MEMP_MAX] = {
#define LWIP_MEMPOOL(name,num,size,desc) &memp_ ## name,
#include "lwip/priv/memp_std.h"
};
#ifdef LWIP_HOOK_FILENAME
#include LWIP_HOOK_FILENAME
#endif
#if MEMP_MEM_MALLOC && MEMP_OVERFLOW_CHECK >= 2
#undef MEMP_OVERFLOW_CHECK
/* MEMP_OVERFLOW_CHECK >= 2 does not work with MEMP_MEM_MALLOC, use 1 instead */
#define MEMP_OVERFLOW_CHECK 1
#endif
#if MEMP_SANITY_CHECK && !MEMP_MEM_MALLOC
/**
* Check that memp-lists don't form a circle, using "Floyd's cycle-finding algorithm".
*/
static int
memp_sanity(const struct memp_desc *desc)
{
struct memp *t, *h;
t = *desc->tab;
if (t != NULL) {
for (h = t->next; (t != NULL) && (h != NULL); t = t->next,
h = ((h->next != NULL) ? h->next->next : NULL)) {
if (t == h) {
return 0;
}
}
}
return 1;
}
#endif /* MEMP_SANITY_CHECK && !MEMP_MEM_MALLOC */
#if MEMP_OVERFLOW_CHECK
/**
* Check if a memp element was victim of an overflow or underflow
* (e.g. the restricted area after/before it has been altered)
*
* @param p the memp element to check
* @param desc the pool p comes from
*/
static void
memp_overflow_check_element(struct memp *p, const struct memp_desc *desc)
{
mem_overflow_check_raw((u8_t *)p + MEMP_SIZE, desc->size, "pool ", desc->desc);
}
/**
* Initialize the restricted area of on memp element.
*/
static void
memp_overflow_init_element(struct memp *p, const struct memp_desc *desc)
{
mem_overflow_init_raw((u8_t *)p + MEMP_SIZE, desc->size);
}
#if MEMP_OVERFLOW_CHECK >= 2
/**
* Do an overflow check for all elements in every pool.
*
* @see memp_overflow_check_element for a description of the check
*/
static void
memp_overflow_check_all(void)
{
u16_t i, j;
struct memp *p;
SYS_ARCH_DECL_PROTECT(old_level);
SYS_ARCH_PROTECT(old_level);
for (i = 0; i < MEMP_MAX; ++i) {
p = (struct memp *)LWIP_MEM_ALIGN(memp_pools[i]->base);
for (j = 0; j < memp_pools[i]->num; ++j) {
memp_overflow_check_element(p, memp_pools[i]);
p = LWIP_ALIGNMENT_CAST(struct memp *, ((u8_t *)p + MEMP_SIZE + memp_pools[i]->size + MEM_SANITY_REGION_AFTER_ALIGNED));
}
}
SYS_ARCH_UNPROTECT(old_level);
}
#endif /* MEMP_OVERFLOW_CHECK >= 2 */
#endif /* MEMP_OVERFLOW_CHECK */
/**
* Initialize custom memory pool.
* Related functions: memp_malloc_pool, memp_free_pool
*
* @param desc pool to initialize
*/
void
memp_init_pool(const struct memp_desc *desc)
{
#if MEMP_MEM_MALLOC
LWIP_UNUSED_ARG(desc);
#else
int i;
struct memp *memp;
*desc->tab = NULL;
memp = (struct memp *)LWIP_MEM_ALIGN(desc->base);
#if MEMP_MEM_INIT
/* force memset on pool memory */
memset(memp, 0, (size_t)desc->num * (MEMP_SIZE + desc->size
#if MEMP_OVERFLOW_CHECK
+ MEM_SANITY_REGION_AFTER_ALIGNED
#endif
));
#endif
/* create a linked list of memp elements */
for (i = 0; i < desc->num; ++i) {
memp->next = *desc->tab;
*desc->tab = memp;
#if MEMP_OVERFLOW_CHECK
memp_overflow_init_element(memp, desc);
#endif /* MEMP_OVERFLOW_CHECK */
/* cast through void* to get rid of alignment warnings */
memp = (struct memp *)(void *)((u8_t *)memp + MEMP_SIZE + desc->size
#if MEMP_OVERFLOW_CHECK
+ MEM_SANITY_REGION_AFTER_ALIGNED
#endif
);
}
#if MEMP_STATS
desc->stats->avail = desc->num;
#endif /* MEMP_STATS */
#endif /* !MEMP_MEM_MALLOC */
#if MEMP_STATS && (defined(LWIP_DEBUG) || LWIP_STATS_DISPLAY)
desc->stats->name = desc->desc;
#endif /* MEMP_STATS && (defined(LWIP_DEBUG) || LWIP_STATS_DISPLAY) */
}
/**
* Initializes lwIP built-in pools.
* Related functions: memp_malloc, memp_free
*
* Carves out memp_memory into linked lists for each pool-type.
*/
void
memp_init(void)
{
u16_t i;
/* for every pool: */
for (i = 0; i < LWIP_ARRAYSIZE(memp_pools); i++) {
memp_init_pool(memp_pools[i]);
#if LWIP_STATS && MEMP_STATS
lwip_stats.memp[i] = memp_pools[i]->stats;
#endif
}
#if MEMP_OVERFLOW_CHECK >= 2
/* check everything a first time to see if it worked */
memp_overflow_check_all();
#endif /* MEMP_OVERFLOW_CHECK >= 2 */
}
static void *
#if !MEMP_OVERFLOW_CHECK
do_memp_malloc_pool(const struct memp_desc *desc)
#else
do_memp_malloc_pool_fn(const struct memp_desc *desc, const char *file, const int line)
#endif
{
struct memp *memp;
SYS_ARCH_DECL_PROTECT(old_level);
#if MEMP_MEM_MALLOC
memp = (struct memp *)mem_malloc(MEMP_SIZE + MEMP_ALIGN_SIZE(desc->size));
SYS_ARCH_PROTECT(old_level);
#else /* MEMP_MEM_MALLOC */
SYS_ARCH_PROTECT(old_level);
memp = *desc->tab;
#endif /* MEMP_MEM_MALLOC */
if (memp != NULL) {
#if !MEMP_MEM_MALLOC
#if MEMP_OVERFLOW_CHECK == 1
memp_overflow_check_element(memp, desc);
#endif /* MEMP_OVERFLOW_CHECK */
*desc->tab = memp->next;
#if MEMP_OVERFLOW_CHECK
memp->next = NULL;
#endif /* MEMP_OVERFLOW_CHECK */
#endif /* !MEMP_MEM_MALLOC */
#if MEMP_OVERFLOW_CHECK
memp->file = file;
memp->line = line;
#if MEMP_MEM_MALLOC
memp_overflow_init_element(memp, desc);
#endif /* MEMP_MEM_MALLOC */
#endif /* MEMP_OVERFLOW_CHECK */
LWIP_ASSERT("memp_malloc: memp properly aligned",
((mem_ptr_t)memp % MEM_ALIGNMENT) == 0);
#if MEMP_STATS
desc->stats->used++;
if (desc->stats->used > desc->stats->max) {
desc->stats->max = desc->stats->used;
}
#endif
SYS_ARCH_UNPROTECT(old_level);
/* cast through u8_t* to get rid of alignment warnings */
return ((u8_t *)memp + MEMP_SIZE);
} else {
#if MEMP_STATS
desc->stats->err++;
#endif
SYS_ARCH_UNPROTECT(old_level);
LWIP_DEBUGF(MEMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("memp_malloc: out of memory in pool %s\n", desc->desc));
}
return NULL;
}
/**
* Get an element from a custom pool.
*
* @param desc the pool to get an element from
*
* @return a pointer to the allocated memory or a NULL pointer on error
*/
void *
#if !MEMP_OVERFLOW_CHECK
memp_malloc_pool(const struct memp_desc *desc)
#else
memp_malloc_pool_fn(const struct memp_desc *desc, const char *file, const int line)
#endif
{
LWIP_ASSERT("invalid pool desc", desc != NULL);
if (desc == NULL) {
return NULL;
}
#if !MEMP_OVERFLOW_CHECK
return do_memp_malloc_pool(desc);
#else
return do_memp_malloc_pool_fn(desc, file, line);
#endif
}
/**
* Get an element from a specific pool.
*
* @param type the pool to get an element from
*
* @return a pointer to the allocated memory or a NULL pointer on error
*/
void *
#if !MEMP_OVERFLOW_CHECK
memp_malloc(memp_t type)
#else
memp_malloc_fn(memp_t type, const char *file, const int line)
#endif
{
void *memp;
LWIP_ERROR("memp_malloc: type < MEMP_MAX", (type < MEMP_MAX), return NULL;);
#if MEMP_OVERFLOW_CHECK >= 2
memp_overflow_check_all();
#endif /* MEMP_OVERFLOW_CHECK >= 2 */
#if !MEMP_OVERFLOW_CHECK
memp = do_memp_malloc_pool(memp_pools[type]);
#else
memp = do_memp_malloc_pool_fn(memp_pools[type], file, line);
#endif
return memp;
}
static void
do_memp_free_pool(const struct memp_desc *desc, void *mem)
{
struct memp *memp;
SYS_ARCH_DECL_PROTECT(old_level);
LWIP_ASSERT("memp_free: mem properly aligned",
((mem_ptr_t)mem % MEM_ALIGNMENT) == 0);
/* cast through void* to get rid of alignment warnings */
memp = (struct memp *)(void *)((u8_t *)mem - MEMP_SIZE);
SYS_ARCH_PROTECT(old_level);
#if MEMP_OVERFLOW_CHECK == 1
memp_overflow_check_element(memp, desc);
#endif /* MEMP_OVERFLOW_CHECK */
#if MEMP_STATS
desc->stats->used--;
#endif
#if MEMP_MEM_MALLOC
LWIP_UNUSED_ARG(desc);
SYS_ARCH_UNPROTECT(old_level);
mem_free(memp);
#else /* MEMP_MEM_MALLOC */
memp->next = *desc->tab;
*desc->tab = memp;
#if MEMP_SANITY_CHECK
LWIP_ASSERT("memp sanity", memp_sanity(desc));
#endif /* MEMP_SANITY_CHECK */
SYS_ARCH_UNPROTECT(old_level);
#endif /* !MEMP_MEM_MALLOC */
}
/**
* Put a custom pool element back into its pool.
*
* @param desc the pool where to put mem
* @param mem the memp element to free
*/
void
memp_free_pool(const struct memp_desc *desc, void *mem)
{
LWIP_ASSERT("invalid pool desc", desc != NULL);
if ((desc == NULL) || (mem == NULL)) {
return;
}
do_memp_free_pool(desc, mem);
}
/**
* Put an element back into its pool.
*
* @param type the pool where to put mem
* @param mem the memp element to free
*/
void
memp_free(memp_t type, void *mem)
{
#ifdef LWIP_HOOK_MEMP_AVAILABLE
struct memp *old_first;
#endif
LWIP_ERROR("memp_free: type < MEMP_MAX", (type < MEMP_MAX), return;);
if (mem == NULL) {
return;
}
#if MEMP_OVERFLOW_CHECK >= 2
memp_overflow_check_all();
#endif /* MEMP_OVERFLOW_CHECK >= 2 */
#ifdef LWIP_HOOK_MEMP_AVAILABLE
old_first = *memp_pools[type]->tab;
#endif
do_memp_free_pool(memp_pools[type], mem);
#ifdef LWIP_HOOK_MEMP_AVAILABLE
if (old_first == NULL) {
LWIP_HOOK_MEMP_AVAILABLE(type);
}
#endif
}

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/**
* @file
* Implementation of raw protocol PCBs for low-level handling of
* different types of protocols besides (or overriding) those
* already available in lwIP.\n
* See also @ref raw_raw
*
* @defgroup raw_raw RAW
* @ingroup callbackstyle_api
* Implementation of raw protocol PCBs for low-level handling of
* different types of protocols besides (or overriding) those
* already available in lwIP.\n
* @see @ref api
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
#include "lwip/def.h"
#include "lwip/memp.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/raw.h"
#include "lwip/priv/raw_priv.h"
#include "lwip/stats.h"
#include "lwip/ip6.h"
#include "lwip/ip6_addr.h"
#include "lwip/inet_chksum.h"
#include <string.h>
/** The list of RAW PCBs */
static struct raw_pcb *raw_pcbs;
static u8_t
raw_input_local_match(struct raw_pcb *pcb, u8_t broadcast)
{
LWIP_UNUSED_ARG(broadcast); /* in IPv6 only case */
/* check if PCB is bound to specific netif */
if ((pcb->netif_idx != NETIF_NO_INDEX) &&
(pcb->netif_idx != netif_get_index(ip_data.current_input_netif))) {
return 0;
}
#if LWIP_IPV4 && LWIP_IPV6
/* Dual-stack: PCBs listening to any IP type also listen to any IP address */
if (IP_IS_ANY_TYPE_VAL(pcb->local_ip)) {
#if IP_SOF_BROADCAST_RECV
if ((broadcast != 0) && !ip_get_option(pcb, SOF_BROADCAST)) {
return 0;
}
#endif /* IP_SOF_BROADCAST_RECV */
return 1;
}
#endif /* LWIP_IPV4 && LWIP_IPV6 */
/* Only need to check PCB if incoming IP version matches PCB IP version */
if (IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ip_current_dest_addr())) {
#if LWIP_IPV4
/* Special case: IPv4 broadcast: receive all broadcasts
* Note: broadcast variable can only be 1 if it is an IPv4 broadcast */
if (broadcast != 0) {
#if IP_SOF_BROADCAST_RECV
if (ip_get_option(pcb, SOF_BROADCAST))
#endif /* IP_SOF_BROADCAST_RECV */
{
if (ip4_addr_isany(ip_2_ip4(&pcb->local_ip))) {
return 1;
}
}
} else
#endif /* LWIP_IPV4 */
/* Handle IPv4 and IPv6: catch all or exact match */
if (ip_addr_isany(&pcb->local_ip) ||
ip_addr_cmp(&pcb->local_ip, ip_current_dest_addr())) {
return 1;
}
}
return 0;
}
/**
* Determine if in incoming IP packet is covered by a RAW PCB
* and if so, pass it to a user-provided receive callback function.
*
* Given an incoming IP datagram (as a chain of pbufs) this function
* finds a corresponding RAW PCB and calls the corresponding receive
* callback function.
*
* @param p pbuf to be demultiplexed to a RAW PCB.
* @param inp network interface on which the datagram was received.
* @return - 1 if the packet has been eaten by a RAW PCB receive
* callback function. The caller MAY NOT not reference the
* packet any longer, and MAY NOT call pbuf_free().
* @return - 0 if packet is not eaten (pbuf is still referenced by the
* caller).
*
*/
raw_input_state_t
raw_input(struct pbuf *p, struct netif *inp)
{
struct raw_pcb *pcb, *prev;
s16_t proto;
raw_input_state_t ret = RAW_INPUT_NONE;
u8_t broadcast = ip_addr_isbroadcast(ip_current_dest_addr(), ip_current_netif());
LWIP_UNUSED_ARG(inp);
#if LWIP_IPV6
#if LWIP_IPV4
if (IP_HDR_GET_VERSION(p->payload) == 6)
#endif /* LWIP_IPV4 */
{
struct ip6_hdr *ip6hdr = (struct ip6_hdr *)p->payload;
proto = IP6H_NEXTH(ip6hdr);
}
#if LWIP_IPV4
else
#endif /* LWIP_IPV4 */
#endif /* LWIP_IPV6 */
#if LWIP_IPV4
{
proto = IPH_PROTO((struct ip_hdr *)p->payload);
}
#endif /* LWIP_IPV4 */
prev = NULL;
pcb = raw_pcbs;
/* loop through all raw pcbs until the packet is eaten by one */
/* this allows multiple pcbs to match against the packet by design */
while (pcb != NULL) {
if ((pcb->protocol == proto) && raw_input_local_match(pcb, broadcast) &&
(((pcb->flags & RAW_FLAGS_CONNECTED) == 0) ||
ip_addr_cmp(&pcb->remote_ip, ip_current_src_addr()))) {
/* receive callback function available? */
if (pcb->recv != NULL) {
u8_t eaten;
#ifndef LWIP_NOASSERT
void *old_payload = p->payload;
#endif
ret = RAW_INPUT_DELIVERED;
/* the receive callback function did not eat the packet? */
eaten = pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr());
if (eaten != 0) {
/* receive function ate the packet */
p = NULL;
if (prev != NULL) {
/* move the pcb to the front of raw_pcbs so that is
found faster next time */
prev->next = pcb->next;
pcb->next = raw_pcbs;
raw_pcbs = pcb;
}
return RAW_INPUT_EATEN;
} else {
/* sanity-check that the receive callback did not alter the pbuf */
LWIP_ASSERT("raw pcb recv callback altered pbuf payload pointer without eating packet",
p->payload == old_payload);
}
}
/* no receive callback function was set for this raw PCB */
}
/* drop the packet */
prev = pcb;
pcb = pcb->next;
}
return ret;
}
/**
* @ingroup raw_raw
* Bind a RAW PCB.
*
* @param pcb RAW PCB to be bound with a local address ipaddr.
* @param ipaddr local IP address to bind with. Use IP4_ADDR_ANY to
* bind to all local interfaces.
*
* @return lwIP error code.
* - ERR_OK. Successful. No error occurred.
* - ERR_USE. The specified IP address is already bound to by
* another RAW PCB.
*
* @see raw_disconnect()
*/
err_t
raw_bind(struct raw_pcb *pcb, const ip_addr_t *ipaddr)
{
LWIP_ASSERT_CORE_LOCKED();
if ((pcb == NULL) || (ipaddr == NULL)) {
return ERR_VAL;
}
ip_addr_set_ipaddr(&pcb->local_ip, ipaddr);
#if LWIP_IPV6 && LWIP_IPV6_SCOPES
/* If the given IP address should have a zone but doesn't, assign one now.
* This is legacy support: scope-aware callers should always provide properly
* zoned source addresses. */
if (IP_IS_V6(&pcb->local_ip) &&
ip6_addr_lacks_zone(ip_2_ip6(&pcb->local_ip), IP6_UNKNOWN)) {
ip6_addr_select_zone(ip_2_ip6(&pcb->local_ip), ip_2_ip6(&pcb->local_ip));
}
#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */
return ERR_OK;
}
/**
* @ingroup raw_raw
* Bind an RAW PCB to a specific netif.
* After calling this function, all packets received via this PCB
* are guaranteed to have come in via the specified netif, and all
* outgoing packets will go out via the specified netif.
*
* @param pcb RAW PCB to be bound with netif.
* @param netif netif to bind to. Can be NULL.
*
* @see raw_disconnect()
*/
void
raw_bind_netif(struct raw_pcb *pcb, const struct netif *netif)
{
LWIP_ASSERT_CORE_LOCKED();
if (netif != NULL) {
pcb->netif_idx = netif_get_index(netif);
} else {
pcb->netif_idx = NETIF_NO_INDEX;
}
}
/**
* @ingroup raw_raw
* Connect an RAW PCB. This function is required by upper layers
* of lwip. Using the raw api you could use raw_sendto() instead
*
* This will associate the RAW PCB with the remote address.
*
* @param pcb RAW PCB to be connected with remote address ipaddr and port.
* @param ipaddr remote IP address to connect with.
*
* @return lwIP error code
*
* @see raw_disconnect() and raw_sendto()
*/
err_t
raw_connect(struct raw_pcb *pcb, const ip_addr_t *ipaddr)
{
LWIP_ASSERT_CORE_LOCKED();
if ((pcb == NULL) || (ipaddr == NULL)) {
return ERR_VAL;
}
ip_addr_set_ipaddr(&pcb->remote_ip, ipaddr);
#if LWIP_IPV6 && LWIP_IPV6_SCOPES
/* If the given IP address should have a zone but doesn't, assign one now,
* using the bound address to make a more informed decision when possible. */
if (IP_IS_V6(&pcb->remote_ip) &&
ip6_addr_lacks_zone(ip_2_ip6(&pcb->remote_ip), IP6_UNKNOWN)) {
ip6_addr_select_zone(ip_2_ip6(&pcb->remote_ip), ip_2_ip6(&pcb->local_ip));
}
#endif /* LWIP_IPV6 && LWIP_IPV6_SCOPES */
raw_set_flags(pcb, RAW_FLAGS_CONNECTED);
return ERR_OK;
}
/**
* @ingroup raw_raw
* Disconnect a RAW PCB.
*
* @param pcb the raw pcb to disconnect.
*/
void
raw_disconnect(struct raw_pcb *pcb)
{
LWIP_ASSERT_CORE_LOCKED();
/* reset remote address association */
#if LWIP_IPV4 && LWIP_IPV6
if (IP_IS_ANY_TYPE_VAL(pcb->local_ip)) {
ip_addr_copy(pcb->remote_ip, *IP_ANY_TYPE);
} else {
#endif
ip_addr_set_any(IP_IS_V6_VAL(pcb->remote_ip), &pcb->remote_ip);
#if LWIP_IPV4 && LWIP_IPV6
}
#endif
pcb->netif_idx = NETIF_NO_INDEX;
/* mark PCB as unconnected */
raw_clear_flags(pcb, RAW_FLAGS_CONNECTED);
}
/**
* @ingroup raw_raw
* Set the callback function for received packets that match the
* raw PCB's protocol and binding.
*
* The callback function MUST either
* - eat the packet by calling pbuf_free() and returning non-zero. The
* packet will not be passed to other raw PCBs or other protocol layers.
* - not free the packet, and return zero. The packet will be matched
* against further PCBs and/or forwarded to another protocol layers.
*/
void
raw_recv(struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg)
{
LWIP_ASSERT_CORE_LOCKED();
/* remember recv() callback and user data */
pcb->recv = recv;
pcb->recv_arg = recv_arg;
}
/**
* @ingroup raw_raw
* Send the raw IP packet to the given address. An IP header will be prepended
* to the packet, unless the RAW_FLAGS_HDRINCL flag is set on the PCB. In that
* case, the packet must include an IP header, which will then be sent as is.
*
* @param pcb the raw pcb which to send
* @param p the IP payload to send
* @param ipaddr the destination address of the IP packet
*
*/
err_t
raw_sendto(struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *ipaddr)
{
struct netif *netif;
const ip_addr_t *src_ip;
if ((pcb == NULL) || (ipaddr == NULL) || !IP_ADDR_PCB_VERSION_MATCH(pcb, ipaddr)) {
return ERR_VAL;
}
LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_sendto\n"));
if (pcb->netif_idx != NETIF_NO_INDEX) {
netif = netif_get_by_index(pcb->netif_idx);
} else {
#if LWIP_MULTICAST_TX_OPTIONS
netif = NULL;
if (ip_addr_ismulticast(ipaddr)) {
/* For multicast-destined packets, use the user-provided interface index to
* determine the outgoing interface, if an interface index is set and a
* matching netif can be found. Otherwise, fall back to regular routing. */
netif = netif_get_by_index(pcb->mcast_ifindex);
}
if (netif == NULL)
#endif /* LWIP_MULTICAST_TX_OPTIONS */
{
netif = ip_route(&pcb->local_ip, ipaddr);
}
}
if (netif == NULL) {
LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to "));
ip_addr_debug_print(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ipaddr);
return ERR_RTE;
}
if (ip_addr_isany(&pcb->local_ip) || ip_addr_ismulticast(&pcb->local_ip)) {
/* use outgoing network interface IP address as source address */
src_ip = ip_netif_get_local_ip(netif, ipaddr);
#if LWIP_IPV6
if (src_ip == NULL) {
return ERR_RTE;
}
#endif /* LWIP_IPV6 */
} else {
/* use RAW PCB local IP address as source address */
src_ip = &pcb->local_ip;
}
return raw_sendto_if_src(pcb, p, ipaddr, netif, src_ip);
}
/**
* @ingroup raw_raw
* Send the raw IP packet to the given address, using a particular outgoing
* netif and source IP address. An IP header will be prepended to the packet,
* unless the RAW_FLAGS_HDRINCL flag is set on the PCB. In that case, the
* packet must include an IP header, which will then be sent as is.
*
* @param pcb RAW PCB used to send the data
* @param p chain of pbufs to be sent
* @param dst_ip destination IP address
* @param netif the netif used for sending
* @param src_ip source IP address
*/
err_t
raw_sendto_if_src(struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *dst_ip,
struct netif *netif, const ip_addr_t *src_ip)
{
err_t err;
struct pbuf *q; /* q will be sent down the stack */
u16_t header_size;
u8_t ttl;
LWIP_ASSERT_CORE_LOCKED();
if ((pcb == NULL) || (dst_ip == NULL) || (netif == NULL) || (src_ip == NULL) ||
!IP_ADDR_PCB_VERSION_MATCH(pcb, src_ip) || !IP_ADDR_PCB_VERSION_MATCH(pcb, dst_ip)) {
return ERR_VAL;
}
header_size = (
#if LWIP_IPV4 && LWIP_IPV6
IP_IS_V6(dst_ip) ? IP6_HLEN : IP_HLEN);
#elif LWIP_IPV4
IP_HLEN);
#else
IP6_HLEN);
#endif
/* Handle the HDRINCL option as an exception: none of the code below applies
* to this case, and sending the packet needs to be done differently too. */
if (pcb->flags & RAW_FLAGS_HDRINCL) {
/* A full header *must* be present in the first pbuf of the chain, as the
* output routines may access its fields directly. */
if (p->len < header_size) {
return ERR_VAL;
}
/* @todo multicast loop support, if at all desired for this scenario.. */
NETIF_SET_HINTS(netif, &pcb->netif_hints);
err = ip_output_if_hdrincl(p, src_ip, dst_ip, netif);
NETIF_RESET_HINTS(netif);
return err;
}
/* packet too large to add an IP header without causing an overflow? */
if ((u16_t)(p->tot_len + header_size) < p->tot_len) {
return ERR_MEM;
}
/* not enough space to add an IP header to first pbuf in given p chain? */
if (pbuf_add_header(p, header_size)) {
/* allocate header in new pbuf */
q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
/* new header pbuf could not be allocated? */
if (q == NULL) {
LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
return ERR_MEM;
}
if (p->tot_len != 0) {
/* chain header q in front of given pbuf p */
pbuf_chain(q, p);
}
/* { first pbuf q points to header pbuf } */
LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
} else {
/* first pbuf q equals given pbuf */
q = p;
if (pbuf_remove_header(q, header_size)) {
LWIP_ASSERT("Can't restore header we just removed!", 0);
return ERR_MEM;
}
}
#if IP_SOF_BROADCAST
if (IP_IS_V4(dst_ip)) {
/* broadcast filter? */
if (!ip_get_option(pcb, SOF_BROADCAST) && ip_addr_isbroadcast(dst_ip, netif)) {
LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
/* free any temporary header pbuf allocated by pbuf_header() */
if (q != p) {
pbuf_free(q);
}
return ERR_VAL;
}
}
#endif /* IP_SOF_BROADCAST */
/* Multicast Loop? */
#if LWIP_MULTICAST_TX_OPTIONS
if (((pcb->flags & RAW_FLAGS_MULTICAST_LOOP) != 0) && ip_addr_ismulticast(dst_ip)) {
q->flags |= PBUF_FLAG_MCASTLOOP;
}
#endif /* LWIP_MULTICAST_TX_OPTIONS */
#if LWIP_IPV6
/* If requested, based on the IPV6_CHECKSUM socket option per RFC3542,
compute the checksum and update the checksum in the payload. */
if (IP_IS_V6(dst_ip) && pcb->chksum_reqd) {
u16_t chksum = ip6_chksum_pseudo(p, pcb->protocol, p->tot_len, ip_2_ip6(src_ip), ip_2_ip6(dst_ip));
LWIP_ASSERT("Checksum must fit into first pbuf", p->len >= (pcb->chksum_offset + 2));
SMEMCPY(((u8_t *)p->payload) + pcb->chksum_offset, &chksum, sizeof(u16_t));
}
#endif
/* Determine TTL to use */
#if LWIP_MULTICAST_TX_OPTIONS
ttl = (ip_addr_ismulticast(dst_ip) ? raw_get_multicast_ttl(pcb) : pcb->ttl);
#else /* LWIP_MULTICAST_TX_OPTIONS */
ttl = pcb->ttl;
#endif /* LWIP_MULTICAST_TX_OPTIONS */
NETIF_SET_HINTS(netif, &pcb->netif_hints);
err = ip_output_if(q, src_ip, dst_ip, ttl, pcb->tos, pcb->protocol, netif);
NETIF_RESET_HINTS(netif);
/* did we chain a header earlier? */
if (q != p) {
/* free the header */
pbuf_free(q);
}
return err;
}
/**
* @ingroup raw_raw
* Send the raw IP packet to the address given by raw_connect()
*
* @param pcb the raw pcb which to send
* @param p the IP payload to send
*
*/
err_t
raw_send(struct raw_pcb *pcb, struct pbuf *p)
{
return raw_sendto(pcb, p, &pcb->remote_ip);
}
/**
* @ingroup raw_raw
* Remove an RAW PCB.
*
* @param pcb RAW PCB to be removed. The PCB is removed from the list of
* RAW PCB's and the data structure is freed from memory.
*
* @see raw_new()
*/
void
raw_remove(struct raw_pcb *pcb)
{
struct raw_pcb *pcb2;
LWIP_ASSERT_CORE_LOCKED();
/* pcb to be removed is first in list? */
if (raw_pcbs == pcb) {
/* make list start at 2nd pcb */
raw_pcbs = raw_pcbs->next;
/* pcb not 1st in list */
} else {
for (pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
/* find pcb in raw_pcbs list */
if (pcb2->next != NULL && pcb2->next == pcb) {
/* remove pcb from list */
pcb2->next = pcb->next;
break;
}
}
}
memp_free(MEMP_RAW_PCB, pcb);
}
/**
* @ingroup raw_raw
* Create a RAW PCB.
*
* @return The RAW PCB which was created. NULL if the PCB data structure
* could not be allocated.
*
* @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
*
* @see raw_remove()
*/
struct raw_pcb *
raw_new(u8_t proto)
{
struct raw_pcb *pcb;
LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE, ("raw_new\n"));
LWIP_ASSERT_CORE_LOCKED();
pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
/* could allocate RAW PCB? */
if (pcb != NULL) {
/* initialize PCB to all zeroes */
memset(pcb, 0, sizeof(struct raw_pcb));
pcb->protocol = proto;
pcb->ttl = RAW_TTL;
#if LWIP_MULTICAST_TX_OPTIONS
raw_set_multicast_ttl(pcb, RAW_TTL);
#endif /* LWIP_MULTICAST_TX_OPTIONS */
pcb->next = raw_pcbs;
raw_pcbs = pcb;
}
return pcb;
}
/**
* @ingroup raw_raw
* Create a RAW PCB for specific IP type.
*
* @return The RAW PCB which was created. NULL if the PCB data structure
* could not be allocated.
*
* @param type IP address type, see @ref lwip_ip_addr_type definitions.
* If you want to listen to IPv4 and IPv6 (dual-stack) packets,
* supply @ref IPADDR_TYPE_ANY as argument and bind to @ref IP_ANY_TYPE.
* @param proto the protocol number (next header) of the IPv6 packet payload
* (e.g. IP6_NEXTH_ICMP6)
*
* @see raw_remove()
*/
struct raw_pcb *
raw_new_ip_type(u8_t type, u8_t proto)
{
struct raw_pcb *pcb;
LWIP_ASSERT_CORE_LOCKED();
pcb = raw_new(proto);
#if LWIP_IPV4 && LWIP_IPV6
if (pcb != NULL) {
IP_SET_TYPE_VAL(pcb->local_ip, type);
IP_SET_TYPE_VAL(pcb->remote_ip, type);
}
#else /* LWIP_IPV4 && LWIP_IPV6 */
LWIP_UNUSED_ARG(type);
#endif /* LWIP_IPV4 && LWIP_IPV6 */
return pcb;
}
/** This function is called from netif.c when address is changed
*
* @param old_addr IP address of the netif before change
* @param new_addr IP address of the netif after change
*/
void raw_netif_ip_addr_changed(const ip_addr_t *old_addr, const ip_addr_t *new_addr)
{
struct raw_pcb *rpcb;
if (!ip_addr_isany(old_addr) && !ip_addr_isany(new_addr)) {
for (rpcb = raw_pcbs; rpcb != NULL; rpcb = rpcb->next) {
/* PCB bound to current local interface address? */
if (ip_addr_cmp(&rpcb->local_ip, old_addr)) {
/* The PCB is bound to the old ipaddr and
* is set to bound to the new one instead */
ip_addr_copy(rpcb->local_ip, *new_addr);
}
}
}
}
#endif /* LWIP_RAW */

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/**
* @file
* Statistics module
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#if LWIP_STATS /* don't build if not configured for use in lwipopts.h */
#include "lwip/def.h"
#include "lwip/stats.h"
#include "lwip/mem.h"
#include "lwip/debug.h"
#include <string.h>
struct stats_ lwip_stats;
void
stats_init(void)
{
#ifdef LWIP_DEBUG
#if MEM_STATS
lwip_stats.mem.name = "MEM";
#endif /* MEM_STATS */
#endif /* LWIP_DEBUG */
}
#if LWIP_STATS_DISPLAY
void
stats_display_proto(struct stats_proto *proto, const char *name)
{
LWIP_PLATFORM_DIAG(("\n%s\n\t", name));
LWIP_PLATFORM_DIAG(("xmit: %"STAT_COUNTER_F"\n\t", proto->xmit));
LWIP_PLATFORM_DIAG(("recv: %"STAT_COUNTER_F"\n\t", proto->recv));
LWIP_PLATFORM_DIAG(("fw: %"STAT_COUNTER_F"\n\t", proto->fw));
LWIP_PLATFORM_DIAG(("drop: %"STAT_COUNTER_F"\n\t", proto->drop));
LWIP_PLATFORM_DIAG(("chkerr: %"STAT_COUNTER_F"\n\t", proto->chkerr));
LWIP_PLATFORM_DIAG(("lenerr: %"STAT_COUNTER_F"\n\t", proto->lenerr));
LWIP_PLATFORM_DIAG(("memerr: %"STAT_COUNTER_F"\n\t", proto->memerr));
LWIP_PLATFORM_DIAG(("rterr: %"STAT_COUNTER_F"\n\t", proto->rterr));
LWIP_PLATFORM_DIAG(("proterr: %"STAT_COUNTER_F"\n\t", proto->proterr));
LWIP_PLATFORM_DIAG(("opterr: %"STAT_COUNTER_F"\n\t", proto->opterr));
LWIP_PLATFORM_DIAG(("err: %"STAT_COUNTER_F"\n\t", proto->err));
LWIP_PLATFORM_DIAG(("cachehit: %"STAT_COUNTER_F"\n", proto->cachehit));
}
#if IGMP_STATS || MLD6_STATS
void
stats_display_igmp(struct stats_igmp *igmp, const char *name)
{
LWIP_PLATFORM_DIAG(("\n%s\n\t", name));
LWIP_PLATFORM_DIAG(("xmit: %"STAT_COUNTER_F"\n\t", igmp->xmit));
LWIP_PLATFORM_DIAG(("recv: %"STAT_COUNTER_F"\n\t", igmp->recv));
LWIP_PLATFORM_DIAG(("drop: %"STAT_COUNTER_F"\n\t", igmp->drop));
LWIP_PLATFORM_DIAG(("chkerr: %"STAT_COUNTER_F"\n\t", igmp->chkerr));
LWIP_PLATFORM_DIAG(("lenerr: %"STAT_COUNTER_F"\n\t", igmp->lenerr));
LWIP_PLATFORM_DIAG(("memerr: %"STAT_COUNTER_F"\n\t", igmp->memerr));
LWIP_PLATFORM_DIAG(("proterr: %"STAT_COUNTER_F"\n\t", igmp->proterr));
LWIP_PLATFORM_DIAG(("rx_v1: %"STAT_COUNTER_F"\n\t", igmp->rx_v1));
LWIP_PLATFORM_DIAG(("rx_group: %"STAT_COUNTER_F"\n\t", igmp->rx_group));
LWIP_PLATFORM_DIAG(("rx_general: %"STAT_COUNTER_F"\n\t", igmp->rx_general));
LWIP_PLATFORM_DIAG(("rx_report: %"STAT_COUNTER_F"\n\t", igmp->rx_report));
LWIP_PLATFORM_DIAG(("tx_join: %"STAT_COUNTER_F"\n\t", igmp->tx_join));
LWIP_PLATFORM_DIAG(("tx_leave: %"STAT_COUNTER_F"\n\t", igmp->tx_leave));
LWIP_PLATFORM_DIAG(("tx_report: %"STAT_COUNTER_F"\n", igmp->tx_report));
}
#endif /* IGMP_STATS || MLD6_STATS */
#if MEM_STATS || MEMP_STATS
void
stats_display_mem(struct stats_mem *mem, const char *name)
{
LWIP_PLATFORM_DIAG(("\nMEM %s\n\t", name));
LWIP_PLATFORM_DIAG(("avail: %"MEM_SIZE_F"\n\t", mem->avail));
LWIP_PLATFORM_DIAG(("used: %"MEM_SIZE_F"\n\t", mem->used));
LWIP_PLATFORM_DIAG(("max: %"MEM_SIZE_F"\n\t", mem->max));
LWIP_PLATFORM_DIAG(("err: %"STAT_COUNTER_F"\n", mem->err));
}
#if MEMP_STATS
void
stats_display_memp(struct stats_mem *mem, int idx)
{
if (idx < MEMP_MAX) {
stats_display_mem(mem, mem->name);
}
}
#endif /* MEMP_STATS */
#endif /* MEM_STATS || MEMP_STATS */
#if SYS_STATS
void
stats_display_sys(struct stats_sys *sys)
{
LWIP_PLATFORM_DIAG(("\nSYS\n\t"));
LWIP_PLATFORM_DIAG(("sem.used: %"STAT_COUNTER_F"\n\t", sys->sem.used));
LWIP_PLATFORM_DIAG(("sem.max: %"STAT_COUNTER_F"\n\t", sys->sem.max));
LWIP_PLATFORM_DIAG(("sem.err: %"STAT_COUNTER_F"\n\t", sys->sem.err));
LWIP_PLATFORM_DIAG(("mutex.used: %"STAT_COUNTER_F"\n\t", sys->mutex.used));
LWIP_PLATFORM_DIAG(("mutex.max: %"STAT_COUNTER_F"\n\t", sys->mutex.max));
LWIP_PLATFORM_DIAG(("mutex.err: %"STAT_COUNTER_F"\n\t", sys->mutex.err));
LWIP_PLATFORM_DIAG(("mbox.used: %"STAT_COUNTER_F"\n\t", sys->mbox.used));
LWIP_PLATFORM_DIAG(("mbox.max: %"STAT_COUNTER_F"\n\t", sys->mbox.max));
LWIP_PLATFORM_DIAG(("mbox.err: %"STAT_COUNTER_F"\n", sys->mbox.err));
}
#endif /* SYS_STATS */
void
stats_display(void)
{
s16_t i;
LINK_STATS_DISPLAY();
ETHARP_STATS_DISPLAY();
IPFRAG_STATS_DISPLAY();
IP6_FRAG_STATS_DISPLAY();
IP_STATS_DISPLAY();
ND6_STATS_DISPLAY();
IP6_STATS_DISPLAY();
IGMP_STATS_DISPLAY();
MLD6_STATS_DISPLAY();
ICMP_STATS_DISPLAY();
ICMP6_STATS_DISPLAY();
UDP_STATS_DISPLAY();
TCP_STATS_DISPLAY();
MEM_STATS_DISPLAY();
for (i = 0; i < MEMP_MAX; i++) {
MEMP_STATS_DISPLAY(i);
}
SYS_STATS_DISPLAY();
}
#endif /* LWIP_STATS_DISPLAY */
#endif /* LWIP_STATS */

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/**
* @file
* lwIP Operating System abstraction
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/**
* @defgroup sys_layer Porting (system abstraction layer)
* @ingroup lwip
*
* @defgroup sys_os OS abstraction layer
* @ingroup sys_layer
* No need to implement functions in this section in NO_SYS mode.
* The OS-specific code should be implemented in arch/sys_arch.h
* and sys_arch.c of your port.
*
* The operating system emulation layer provides a common interface
* between the lwIP code and the underlying operating system kernel. The
* general idea is that porting lwIP to new architectures requires only
* small changes to a few header files and a new sys_arch
* implementation. It is also possible to do a sys_arch implementation
* that does not rely on any underlying operating system.
*
* The sys_arch provides semaphores, mailboxes and mutexes to lwIP. For the full
* lwIP functionality, multiple threads support can be implemented in the
* sys_arch, but this is not required for the basic lwIP
* functionality. Timer scheduling is implemented in lwIP, but can be implemented
* by the sys_arch port (LWIP_TIMERS_CUSTOM==1).
*
* In addition to the source file providing the functionality of sys_arch,
* the OS emulation layer must provide several header files defining
* macros used throughout lwip. The files required and the macros they
* must define are listed below the sys_arch description.
*
* Since lwIP 1.4.0, semaphore, mutexes and mailbox functions are prototyped in a way that
* allows both using pointers or actual OS structures to be used. This way, memory
* required for such types can be either allocated in place (globally or on the
* stack) or on the heap (allocated internally in the "*_new()" functions).
*
* Note:
* -----
* Be careful with using mem_malloc() in sys_arch. When malloc() refers to
* mem_malloc() you can run into a circular function call problem. In mem.c
* mem_init() tries to allocate a semaphore using mem_malloc, which of course
* can't be performed when sys_arch uses mem_malloc.
*
* @defgroup sys_sem Semaphores
* @ingroup sys_os
* Semaphores can be either counting or binary - lwIP works with both
* kinds.
* Semaphores are represented by the type "sys_sem_t" which is typedef'd
* in the sys_arch.h file. Mailboxes are equivalently represented by the
* type "sys_mbox_t". Mutexes are represented by the type "sys_mutex_t".
* lwIP does not place any restrictions on how these types are represented
* internally.
*
* @defgroup sys_mutex Mutexes
* @ingroup sys_os
* Mutexes are recommended to correctly handle priority inversion,
* especially if you use LWIP_CORE_LOCKING .
*
* @defgroup sys_mbox Mailboxes
* @ingroup sys_os
* Mailboxes should be implemented as a queue which allows multiple messages
* to be posted (implementing as a rendez-vous point where only one message can be
* posted at a time can have a highly negative impact on performance). A message
* in a mailbox is just a pointer, nothing more.
*
* @defgroup sys_time Time
* @ingroup sys_layer
*
* @defgroup sys_prot Critical sections
* @ingroup sys_layer
* Used to protect short regions of code against concurrent access.
* - Your system is a bare-metal system (probably with an RTOS)
* and interrupts are under your control:
* Implement this as LockInterrupts() / UnlockInterrupts()
* - Your system uses an RTOS with deferred interrupt handling from a
* worker thread: Implement as a global mutex or lock/unlock scheduler
* - Your system uses a high-level OS with e.g. POSIX signals:
* Implement as a global mutex
*
* @defgroup sys_misc Misc
* @ingroup sys_os
*/
#include "lwip/opt.h"
#include "lwip/sys.h"
/* Most of the functions defined in sys.h must be implemented in the
* architecture-dependent file sys_arch.c */
#if !NO_SYS
#ifndef sys_msleep
/**
* Sleep for some ms. Timeouts are NOT processed while sleeping.
*
* @param ms number of milliseconds to sleep
*/
void
sys_msleep(u32_t ms)
{
if (ms > 0) {
sys_sem_t delaysem;
err_t err = sys_sem_new(&delaysem, 0);
if (err == ERR_OK) {
sys_arch_sem_wait(&delaysem, ms);
sys_sem_free(&delaysem);
}
}
}
#endif /* sys_msleep */
#endif /* !NO_SYS */

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/**
* @file
* Stack-internal timers implementation.
* This file includes timer callbacks for stack-internal timers as well as
* functions to set up or stop timers and check for expired timers.
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
* Simon Goldschmidt
*
*/
#include "lwip/opt.h"
#include "lwip/timeouts.h"
#include "lwip/priv/tcp_priv.h"
#include "lwip/def.h"
#include "lwip/memp.h"
#include "lwip/priv/tcpip_priv.h"
#include "lwip/ip4_frag.h"
#include "lwip/etharp.h"
#include "lwip/dhcp.h"
#include "lwip/autoip.h"
#include "lwip/igmp.h"
#include "lwip/dns.h"
#include "lwip/nd6.h"
#include "lwip/ip6_frag.h"
#include "lwip/mld6.h"
#include "lwip/dhcp6.h"
#include "lwip/sys.h"
#include "lwip/pbuf.h"
#if LWIP_DEBUG_TIMERNAMES
#define HANDLER(x) x, #x
#else /* LWIP_DEBUG_TIMERNAMES */
#define HANDLER(x) x
#endif /* LWIP_DEBUG_TIMERNAMES */
#define LWIP_MAX_TIMEOUT 0x7fffffff
/* Check if timer's expiry time is greater than time and care about u32_t wraparounds */
#define TIME_LESS_THAN(t, compare_to) ( (((u32_t)((t)-(compare_to))) > LWIP_MAX_TIMEOUT) ? 1 : 0 )
/** This array contains all stack-internal cyclic timers. To get the number of
* timers, use LWIP_ARRAYSIZE() */
const struct lwip_cyclic_timer lwip_cyclic_timers[] = {
#if LWIP_TCP
/* The TCP timer is a special case: it does not have to run always and
is triggered to start from TCP using tcp_timer_needed() */
{TCP_TMR_INTERVAL, HANDLER(tcp_tmr)},
#endif /* LWIP_TCP */
#if LWIP_IPV4
#if IP_REASSEMBLY
{IP_TMR_INTERVAL, HANDLER(ip_reass_tmr)},
#endif /* IP_REASSEMBLY */
#if LWIP_ARP
{ARP_TMR_INTERVAL, HANDLER(etharp_tmr)},
#endif /* LWIP_ARP */
#if LWIP_DHCP
{DHCP_COARSE_TIMER_MSECS, HANDLER(dhcp_coarse_tmr)},
{DHCP_FINE_TIMER_MSECS, HANDLER(dhcp_fine_tmr)},
#endif /* LWIP_DHCP */
#if LWIP_AUTOIP
{AUTOIP_TMR_INTERVAL, HANDLER(autoip_tmr)},
#endif /* LWIP_AUTOIP */
#if LWIP_IGMP
{IGMP_TMR_INTERVAL, HANDLER(igmp_tmr)},
#endif /* LWIP_IGMP */
#endif /* LWIP_IPV4 */
#if LWIP_DNS
{DNS_TMR_INTERVAL, HANDLER(dns_tmr)},
#endif /* LWIP_DNS */
#if LWIP_IPV6
{ND6_TMR_INTERVAL, HANDLER(nd6_tmr)},
#if LWIP_IPV6_REASS
{IP6_REASS_TMR_INTERVAL, HANDLER(ip6_reass_tmr)},
#endif /* LWIP_IPV6_REASS */
#if LWIP_IPV6_MLD
{MLD6_TMR_INTERVAL, HANDLER(mld6_tmr)},
#endif /* LWIP_IPV6_MLD */
#if LWIP_IPV6_DHCP6
{DHCP6_TIMER_MSECS, HANDLER(dhcp6_tmr)},
#endif /* LWIP_IPV6_DHCP6 */
#endif /* LWIP_IPV6 */
};
const int lwip_num_cyclic_timers = LWIP_ARRAYSIZE(lwip_cyclic_timers);
#if LWIP_TIMERS && !LWIP_TIMERS_CUSTOM
/** The one and only timeout list */
static struct sys_timeo *next_timeout;
static u32_t current_timeout_due_time;
#if LWIP_TESTMODE
struct sys_timeo**
sys_timeouts_get_next_timeout(void)
{
return &next_timeout;
}
#endif
#if LWIP_TCP
/** global variable that shows if the tcp timer is currently scheduled or not */
static int tcpip_tcp_timer_active;
/**
* Timer callback function that calls tcp_tmr() and reschedules itself.
*
* @param arg unused argument
*/
static void
tcpip_tcp_timer(void *arg)
{
LWIP_UNUSED_ARG(arg);
/* call TCP timer handler */
tcp_tmr();
/* timer still needed? */
if (tcp_active_pcbs || tcp_tw_pcbs) {
/* restart timer */
sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
} else {
/* disable timer */
tcpip_tcp_timer_active = 0;
}
}
/**
* Called from TCP_REG when registering a new PCB:
* the reason is to have the TCP timer only running when
* there are active (or time-wait) PCBs.
*/
void
tcp_timer_needed(void)
{
LWIP_ASSERT_CORE_LOCKED();
/* timer is off but needed again? */
if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
/* enable and start timer */
tcpip_tcp_timer_active = 1;
sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
}
}
#endif /* LWIP_TCP */
static void
#if LWIP_DEBUG_TIMERNAMES
sys_timeout_abs(u32_t abs_time, sys_timeout_handler handler, void *arg, const char *handler_name)
#else /* LWIP_DEBUG_TIMERNAMES */
sys_timeout_abs(u32_t abs_time, sys_timeout_handler handler, void *arg)
#endif
{
struct sys_timeo *timeout, *t;
timeout = (struct sys_timeo *)memp_malloc(MEMP_SYS_TIMEOUT);
if (timeout == NULL) {
LWIP_ASSERT("sys_timeout: timeout != NULL, pool MEMP_SYS_TIMEOUT is empty", timeout != NULL);
return;
}
timeout->next = NULL;
timeout->h = handler;
timeout->arg = arg;
timeout->time = abs_time;
#if LWIP_DEBUG_TIMERNAMES
timeout->handler_name = handler_name;
LWIP_DEBUGF(TIMERS_DEBUG, ("sys_timeout: %p abs_time=%"U32_F" handler=%s arg=%p\n",
(void *)timeout, abs_time, handler_name, (void *)arg));
#endif /* LWIP_DEBUG_TIMERNAMES */
if (next_timeout == NULL) {
next_timeout = timeout;
return;
}
if (TIME_LESS_THAN(timeout->time, next_timeout->time)) {
timeout->next = next_timeout;
next_timeout = timeout;
} else {
for (t = next_timeout; t != NULL; t = t->next) {
if ((t->next == NULL) || TIME_LESS_THAN(timeout->time, t->next->time)) {
timeout->next = t->next;
t->next = timeout;
break;
}
}
}
}
/**
* Timer callback function that calls cyclic->handler() and reschedules itself.
*
* @param arg unused argument
*/
#if !LWIP_TESTMODE
static
#endif
void
lwip_cyclic_timer(void *arg)
{
u32_t now;
u32_t next_timeout_time;
const struct lwip_cyclic_timer *cyclic = (const struct lwip_cyclic_timer *)arg;
#if LWIP_DEBUG_TIMERNAMES
LWIP_DEBUGF(TIMERS_DEBUG, ("tcpip: %s()\n", cyclic->handler_name));
#endif
cyclic->handler();
now = sys_now();
next_timeout_time = (u32_t)(current_timeout_due_time + cyclic->interval_ms); /* overflow handled by TIME_LESS_THAN macro */
if (TIME_LESS_THAN(next_timeout_time, now)) {
/* timer would immediately expire again -> "overload" -> restart without any correction */
#if LWIP_DEBUG_TIMERNAMES
sys_timeout_abs((u32_t)(now + cyclic->interval_ms), lwip_cyclic_timer, arg, cyclic->handler_name);
#else
sys_timeout_abs((u32_t)(now + cyclic->interval_ms), lwip_cyclic_timer, arg);
#endif
} else {
/* correct cyclic interval with handler execution delay and sys_check_timeouts jitter */
#if LWIP_DEBUG_TIMERNAMES
sys_timeout_abs(next_timeout_time, lwip_cyclic_timer, arg, cyclic->handler_name);
#else
sys_timeout_abs(next_timeout_time, lwip_cyclic_timer, arg);
#endif
}
}
/** Initialize this module */
void sys_timeouts_init(void)
{
size_t i;
/* tcp_tmr() at index 0 is started on demand */
for (i = (LWIP_TCP ? 1 : 0); i < LWIP_ARRAYSIZE(lwip_cyclic_timers); i++) {
/* we have to cast via size_t to get rid of const warning
(this is OK as cyclic_timer() casts back to const* */
sys_timeout(lwip_cyclic_timers[i].interval_ms, lwip_cyclic_timer, LWIP_CONST_CAST(void *, &lwip_cyclic_timers[i]));
}
}
/**
* Create a one-shot timer (aka timeout). Timeouts are processed in the
* following cases:
* - while waiting for a message using sys_timeouts_mbox_fetch()
* - by calling sys_check_timeouts() (NO_SYS==1 only)
*
* @param msecs time in milliseconds after that the timer should expire
* @param handler callback function to call when msecs have elapsed
* @param arg argument to pass to the callback function
*/
#if LWIP_DEBUG_TIMERNAMES
void
sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char *handler_name)
#else /* LWIP_DEBUG_TIMERNAMES */
void
sys_timeout(u32_t msecs, sys_timeout_handler handler, void *arg)
#endif /* LWIP_DEBUG_TIMERNAMES */
{
u32_t next_timeout_time;
LWIP_ASSERT_CORE_LOCKED();
LWIP_ASSERT("Timeout time too long, max is LWIP_UINT32_MAX/4 msecs", msecs <= (LWIP_UINT32_MAX / 4));
next_timeout_time = (u32_t)(sys_now() + msecs); /* overflow handled by TIME_LESS_THAN macro */
#if LWIP_DEBUG_TIMERNAMES
sys_timeout_abs(next_timeout_time, handler, arg, handler_name);
#else
sys_timeout_abs(next_timeout_time, handler, arg);
#endif
}
/**
* Go through timeout list (for this task only) and remove the first matching
* entry (subsequent entries remain untouched), even though the timeout has not
* triggered yet.
*
* @param handler callback function that would be called by the timeout
* @param arg callback argument that would be passed to handler
*/
void
sys_untimeout(sys_timeout_handler handler, void *arg)
{
struct sys_timeo *prev_t, *t;
LWIP_ASSERT_CORE_LOCKED();
if (next_timeout == NULL) {
return;
}
for (t = next_timeout, prev_t = NULL; t != NULL; prev_t = t, t = t->next) {
if ((t->h == handler) && (t->arg == arg)) {
/* We have a match */
/* Unlink from previous in list */
if (prev_t == NULL) {
next_timeout = t->next;
} else {
prev_t->next = t->next;
}
memp_free(MEMP_SYS_TIMEOUT, t);
return;
}
}
return;
}
/**
* @ingroup lwip_nosys
* Handle timeouts for NO_SYS==1 (i.e. without using
* tcpip_thread/sys_timeouts_mbox_fetch(). Uses sys_now() to call timeout
* handler functions when timeouts expire.
*
* Must be called periodically from your main loop.
*/
void
sys_check_timeouts(void)
{
u32_t now;
LWIP_ASSERT_CORE_LOCKED();
/* Process only timers expired at the start of the function. */
now = sys_now();
do {
struct sys_timeo *tmptimeout;
sys_timeout_handler handler;
void *arg;
PBUF_CHECK_FREE_OOSEQ();
tmptimeout = next_timeout;
if (tmptimeout == NULL) {
return;
}
if (TIME_LESS_THAN(now, tmptimeout->time)) {
return;
}
/* Timeout has expired */
next_timeout = tmptimeout->next;
handler = tmptimeout->h;
arg = tmptimeout->arg;
current_timeout_due_time = tmptimeout->time;
#if LWIP_DEBUG_TIMERNAMES
if (handler != NULL) {
LWIP_DEBUGF(TIMERS_DEBUG, ("sct calling h=%s t=%"U32_F" arg=%p\n",
tmptimeout->handler_name, sys_now() - tmptimeout->time, arg));
}
#endif /* LWIP_DEBUG_TIMERNAMES */
memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
if (handler != NULL) {
handler(arg);
}
LWIP_TCPIP_THREAD_ALIVE();
/* Repeat until all expired timers have been called */
} while (1);
}
/** Rebase the timeout times to the current time.
* This is necessary if sys_check_timeouts() hasn't been called for a long
* time (e.g. while saving energy) to prevent all timer functions of that
* period being called.
*/
void
sys_restart_timeouts(void)
{
u32_t now;
u32_t base;
struct sys_timeo *t;
if (next_timeout == NULL) {
return;
}
now = sys_now();
base = next_timeout->time;
for (t = next_timeout; t != NULL; t = t->next) {
t->time = (t->time - base) + now;
}
}
/** Return the time left before the next timeout is due. If no timeouts are
* enqueued, returns 0xffffffff
*/
u32_t
sys_timeouts_sleeptime(void)
{
u32_t now;
LWIP_ASSERT_CORE_LOCKED();
if (next_timeout == NULL) {
return SYS_TIMEOUTS_SLEEPTIME_INFINITE;
}
now = sys_now();
if (TIME_LESS_THAN(next_timeout->time, now)) {
return 0;
} else {
u32_t ret = (u32_t)(next_timeout->time - now);
LWIP_ASSERT("invalid sleeptime", ret <= LWIP_MAX_TIMEOUT);
return ret;
}
}
#else /* LWIP_TIMERS && !LWIP_TIMERS_CUSTOM */
/* Satisfy the TCP code which calls this function */
void
tcp_timer_needed(void)
{
}
#endif /* LWIP_TIMERS && !LWIP_TIMERS_CUSTOM */

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#ifndef LWIP_HTTPD_STRUCTS_H
#define LWIP_HTTPD_STRUCTS_H
#include "lwip/apps/httpd.h"
#if LWIP_HTTPD_DYNAMIC_HEADERS
/** This struct is used for a list of HTTP header strings for various
* filename extensions. */
typedef struct {
const char *extension;
const char *content_type;
} tHTTPHeader;
/** A list of strings used in HTTP headers (see RFC 1945 HTTP/1.0 and
* RFC 2616 HTTP/1.1 for header field definitions) */
static const char *const g_psHTTPHeaderStrings[] = {
"HTTP/1.0 200 OK\r\n",
"HTTP/1.0 404 File not found\r\n",
"HTTP/1.0 400 Bad Request\r\n",
"HTTP/1.0 501 Not Implemented\r\n",
"HTTP/1.1 200 OK\r\n",
"HTTP/1.1 404 File not found\r\n",
"HTTP/1.1 400 Bad Request\r\n",
"HTTP/1.1 501 Not Implemented\r\n",
"Content-Length: ",
"Connection: Close\r\n",
"Connection: keep-alive\r\n",
"Connection: keep-alive\r\nContent-Length: ",
"Server: "HTTPD_SERVER_AGENT"\r\n",
"\r\n<html><body><h2>404: The requested file cannot be found.</h2></body></html>\r\n"
#if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
, "Connection: keep-alive\r\nContent-Length: 77\r\n\r\n<html><body><h2>404: The requested file cannot be found.</h2></body></html>\r\n"
#endif
};
/* Indexes into the g_psHTTPHeaderStrings array */
#define HTTP_HDR_OK 0 /* 200 OK */
#define HTTP_HDR_NOT_FOUND 1 /* 404 File not found */
#define HTTP_HDR_BAD_REQUEST 2 /* 400 Bad request */
#define HTTP_HDR_NOT_IMPL 3 /* 501 Not Implemented */
#define HTTP_HDR_OK_11 4 /* 200 OK */
#define HTTP_HDR_NOT_FOUND_11 5 /* 404 File not found */
#define HTTP_HDR_BAD_REQUEST_11 6 /* 400 Bad request */
#define HTTP_HDR_NOT_IMPL_11 7 /* 501 Not Implemented */
#define HTTP_HDR_CONTENT_LENGTH 8 /* Content-Length: (HTTP 1.0)*/
#define HTTP_HDR_CONN_CLOSE 9 /* Connection: Close (HTTP 1.1) */
#define HTTP_HDR_CONN_KEEPALIVE 10 /* Connection: keep-alive (HTTP 1.1) */
#define HTTP_HDR_KEEPALIVE_LEN 11 /* Connection: keep-alive + Content-Length: (HTTP 1.1)*/
#define HTTP_HDR_SERVER 12 /* Server: HTTPD_SERVER_AGENT */
#define DEFAULT_404_HTML 13 /* default 404 body */
#if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
#define DEFAULT_404_HTML_PERSISTENT 14 /* default 404 body, but including Connection: keep-alive */
#endif
#define HTTP_CONTENT_TYPE(contenttype) "Content-Type: "contenttype"\r\n\r\n"
#define HTTP_CONTENT_TYPE_ENCODING(contenttype, encoding) "Content-Type: "contenttype"\r\nContent-Encoding: "encoding"\r\n\r\n"
#define HTTP_HDR_HTML HTTP_CONTENT_TYPE("text/html")
#define HTTP_HDR_SSI HTTP_CONTENT_TYPE("text/html\r\nExpires: Fri, 10 Apr 2008 14:00:00 GMT\r\nPragma: no-cache")
#define HTTP_HDR_GIF HTTP_CONTENT_TYPE("image/gif")
#define HTTP_HDR_PNG HTTP_CONTENT_TYPE("image/png")
#define HTTP_HDR_JPG HTTP_CONTENT_TYPE("image/jpeg")
#define HTTP_HDR_BMP HTTP_CONTENT_TYPE("image/bmp")
#define HTTP_HDR_ICO HTTP_CONTENT_TYPE("image/x-icon")
#define HTTP_HDR_APP HTTP_CONTENT_TYPE("application/octet-stream")
#define HTTP_HDR_JS HTTP_CONTENT_TYPE("application/javascript")
#define HTTP_HDR_RA HTTP_CONTENT_TYPE("application/javascript")
#define HTTP_HDR_CSS HTTP_CONTENT_TYPE("text/css")
#define HTTP_HDR_SWF HTTP_CONTENT_TYPE("application/x-shockwave-flash")
#define HTTP_HDR_XML HTTP_CONTENT_TYPE("text/xml")
#define HTTP_HDR_PDF HTTP_CONTENT_TYPE("application/pdf")
#define HTTP_HDR_JSON HTTP_CONTENT_TYPE("application/json")
#define HTTP_HDR_CSV HTTP_CONTENT_TYPE("text/csv")
#define HTTP_HDR_TSV HTTP_CONTENT_TYPE("text/tsv")
#define HTTP_HDR_SVG HTTP_CONTENT_TYPE("image/svg+xml")
#define HTTP_HDR_SVGZ HTTP_CONTENT_TYPE_ENCODING("image/svg+xml", "gzip")
#define HTTP_HDR_DEFAULT_TYPE HTTP_CONTENT_TYPE("text/plain")
/** A list of extension-to-HTTP header strings (see outdated RFC 1700 MEDIA TYPES
* and http://www.iana.org/assignments/media-types for registered content types
* and subtypes) */
static const tHTTPHeader g_psHTTPHeaders[] = {
{ "html", HTTP_HDR_HTML},
{ "htm", HTTP_HDR_HTML},
{ "shtml", HTTP_HDR_SSI},
{ "shtm", HTTP_HDR_SSI},
{ "ssi", HTTP_HDR_SSI},
{ "gif", HTTP_HDR_GIF},
{ "png", HTTP_HDR_PNG},
{ "jpg", HTTP_HDR_JPG},
{ "bmp", HTTP_HDR_BMP},
{ "ico", HTTP_HDR_ICO},
{ "class", HTTP_HDR_APP},
{ "cls", HTTP_HDR_APP},
{ "js", HTTP_HDR_JS},
{ "ram", HTTP_HDR_RA},
{ "css", HTTP_HDR_CSS},
{ "swf", HTTP_HDR_SWF},
{ "xml", HTTP_HDR_XML},
{ "xsl", HTTP_HDR_XML},
{ "pdf", HTTP_HDR_PDF},
{ "svg", HTTP_HDR_SVG},
{ "json", HTTP_HDR_JSON}
#ifdef HTTPD_ADDITIONAL_CONTENT_TYPES
/* If you need to add content types not listed here:
* #define HTTPD_ADDITIONAL_CONTENT_TYPES {"ct1", HTTP_CONTENT_TYPE("text/ct1")}, {"exe", HTTP_CONTENT_TYPE("application/exe")}
*/
, HTTPD_ADDITIONAL_CONTENT_TYPES
#endif
};
#define NUM_HTTP_HEADERS LWIP_ARRAYSIZE(g_psHTTPHeaders)
#endif /* LWIP_HTTPD_DYNAMIC_HEADERS */
#if LWIP_HTTPD_SSI
static const char *const g_pcSSIExtensions[] = {
".shtml", ".shtm", ".ssi", ".xml", ".json"
};
#define NUM_SHTML_EXTENSIONS LWIP_ARRAYSIZE(g_pcSSIExtensions)
#endif /* LWIP_HTTPD_SSI */
#endif /* LWIP_HTTPD_STRUCTS_H */

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./makefs /home/cfif/gonetc_dump/recovery/ -ssi

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gcc -c -I. -pipe -O2 -Wall -W -o main.o main.c
cc -o ./bin/makefs main.o

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/**
* @file
* Application layered TCP connection API (to be used from TCPIP thread)\n
*
* This file contains the generic API.
* For more details see @ref altcp_api.
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#ifndef LWIP_HDR_ALTCP_H
#define LWIP_HDR_ALTCP_H
#include "lwip/opt.h"
#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
#include "lwip/tcpbase.h"
#include "lwip/err.h"
#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"
#ifdef __cplusplus
extern "C" {
#endif
struct altcp_pcb;
struct altcp_functions;
typedef err_t (*altcp_accept_fn)(void *arg, struct altcp_pcb *new_conn, err_t err);
typedef err_t (*altcp_connected_fn)(void *arg, struct altcp_pcb *conn, err_t err);
typedef err_t (*altcp_recv_fn)(void *arg, struct altcp_pcb *conn, struct pbuf *p, err_t err);
typedef err_t (*altcp_sent_fn)(void *arg, struct altcp_pcb *conn, u16_t len);
typedef err_t (*altcp_poll_fn)(void *arg, struct altcp_pcb *conn);
typedef void (*altcp_err_fn)(void *arg, err_t err);
typedef struct altcp_pcb* (*altcp_new_fn)(void *arg, u8_t ip_type);
struct altcp_pcb {
const struct altcp_functions *fns;
struct altcp_pcb *inner_conn;
void *arg;
void *state;
/* application callbacks */
altcp_accept_fn accept;
altcp_connected_fn connected;
altcp_recv_fn recv;
altcp_sent_fn sent;
altcp_poll_fn poll;
altcp_err_fn err;
u8_t pollinterval;
};
/** @ingroup altcp */
typedef struct altcp_allocator_s {
/** Allocator function */
altcp_new_fn alloc;
/** Argument to allocator function */
void *arg;
} altcp_allocator_t;
struct altcp_pcb *altcp_new(altcp_allocator_t *allocator);
struct altcp_pcb *altcp_new_ip6(altcp_allocator_t *allocator);
struct altcp_pcb *altcp_new_ip_type(altcp_allocator_t *allocator, u8_t ip_type);
void altcp_arg(struct altcp_pcb *conn, void *arg);
void altcp_accept(struct altcp_pcb *conn, altcp_accept_fn accept);
void altcp_recv(struct altcp_pcb *conn, altcp_recv_fn recv);
void altcp_sent(struct altcp_pcb *conn, altcp_sent_fn sent);
void altcp_poll(struct altcp_pcb *conn, altcp_poll_fn poll, u8_t interval);
void altcp_err(struct altcp_pcb *conn, altcp_err_fn err);
void altcp_recved(struct altcp_pcb *conn, u16_t len);
err_t altcp_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port);
err_t altcp_connect(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected);
/* return conn for source code compatibility to tcp callback API only */
struct altcp_pcb *altcp_listen_with_backlog_and_err(struct altcp_pcb *conn, u8_t backlog, err_t *err);
#define altcp_listen_with_backlog(conn, backlog) altcp_listen_with_backlog_and_err(conn, backlog, NULL)
/** @ingroup altcp */
#define altcp_listen(conn) altcp_listen_with_backlog_and_err(conn, TCP_DEFAULT_LISTEN_BACKLOG, NULL)
void altcp_abort(struct altcp_pcb *conn);
err_t altcp_close(struct altcp_pcb *conn);
err_t altcp_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx);
err_t altcp_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags);
err_t altcp_output(struct altcp_pcb *conn);
u16_t altcp_mss(struct altcp_pcb *conn);
u16_t altcp_sndbuf(struct altcp_pcb *conn);
u16_t altcp_sndqueuelen(struct altcp_pcb *conn);
void altcp_nagle_disable(struct altcp_pcb *conn);
void altcp_nagle_enable(struct altcp_pcb *conn);
int altcp_nagle_disabled(struct altcp_pcb *conn);
void altcp_setprio(struct altcp_pcb *conn, u8_t prio);
err_t altcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port);
ip_addr_t *altcp_get_ip(struct altcp_pcb *conn, int local);
u16_t altcp_get_port(struct altcp_pcb *conn, int local);
#ifdef LWIP_DEBUG
enum tcp_state altcp_dbg_get_tcp_state(struct altcp_pcb *conn);
#endif
#ifdef __cplusplus
}
#endif
#else /* LWIP_ALTCP */
/* ALTCP disabled, define everything to link against tcp callback API (e.g. to get a small non-ssl httpd) */
#include "lwip/tcp.h"
#define altcp_accept_fn tcp_accept_fn
#define altcp_connected_fn tcp_connected_fn
#define altcp_recv_fn tcp_recv_fn
#define altcp_sent_fn tcp_sent_fn
#define altcp_poll_fn tcp_poll_fn
#define altcp_err_fn tcp_err_fn
#define altcp_pcb tcp_pcb
#define altcp_tcp_new_ip_type tcp_new_ip_type
#define altcp_tcp_new tcp_new
#define altcp_tcp_new_ip6 tcp_new_ip6
#define altcp_new(allocator) tcp_new()
#define altcp_new_ip6(allocator) tcp_new_ip6()
#define altcp_new_ip_type(allocator, ip_type) tcp_new_ip_type(ip_type)
#define altcp_arg tcp_arg
#define altcp_accept tcp_accept
#define altcp_recv tcp_recv
#define altcp_sent tcp_sent
#define altcp_poll tcp_poll
#define altcp_err tcp_err
#define altcp_recved tcp_recved
#define altcp_bind tcp_bind
#define altcp_connect tcp_connect
#define altcp_listen_with_backlog_and_err tcp_listen_with_backlog_and_err
#define altcp_listen_with_backlog tcp_listen_with_backlog
#define altcp_listen tcp_listen
#define altcp_abort tcp_abort
#define altcp_close tcp_close
#define altcp_shutdown tcp_shutdown
#define altcp_write tcp_write
#define altcp_output tcp_output
#define altcp_mss tcp_mss
#define altcp_sndbuf tcp_sndbuf
#define altcp_sndqueuelen tcp_sndqueuelen
#define altcp_nagle_disable tcp_nagle_disable
#define altcp_nagle_enable tcp_nagle_enable
#define altcp_nagle_disabled tcp_nagle_disabled
#define altcp_setprio tcp_setprio
#define altcp_get_tcp_addrinfo tcp_get_tcp_addrinfo
#define altcp_get_ip(pcb, local) ((local) ? (&(pcb)->local_ip) : (&(pcb)->remote_ip))
#ifdef LWIP_DEBUG
#define altcp_dbg_get_tcp_state tcp_dbg_get_tcp_state
#endif
#endif /* LWIP_ALTCP */
#endif /* LWIP_HDR_ALTCP_H */

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/**
* @file
* Application layered TCP connection API (to be used from TCPIP thread)\n
* This interface mimics the tcp callback API to the application while preventing
* direct linking (much like virtual functions).
* This way, an application can make use of other application layer protocols
* on top of TCP without knowing the details (e.g. TLS, proxy connection).
*
* This file contains the base implementation calling into tcp.
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#ifndef LWIP_HDR_ALTCP_TCP_H
#define LWIP_HDR_ALTCP_TCP_H
#include "lwip/opt.h"
#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
#include "lwip/altcp.h"
#ifdef __cplusplus
extern "C" {
#endif
struct altcp_pcb *altcp_tcp_new_ip_type(u8_t ip_type);
#define altcp_tcp_new() altcp_tcp_new_ip_type(IPADDR_TYPE_V4)
#define altcp_tcp_new_ip6() altcp_tcp_new_ip_type(IPADDR_TYPE_V6)
struct altcp_pcb *altcp_tcp_alloc(void *arg, u8_t ip_type);
struct tcp_pcb;
struct altcp_pcb *altcp_tcp_wrap(struct tcp_pcb *tpcb);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_ALTCP */
#endif /* LWIP_HDR_ALTCP_TCP_H */

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/**
* @file
* Application layered TCP/TLS connection API (to be used from TCPIP thread)
*
* @defgroup altcp_tls TLS layer
* @ingroup altcp
* This file contains function prototypes for a TLS layer.
* A port to ARM mbedtls is provided in the apps/ tree
* (LWIP_ALTCP_TLS_MBEDTLS option).
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#ifndef LWIP_HDR_ALTCP_TLS_H
#define LWIP_HDR_ALTCP_TLS_H
#include "lwip/opt.h"
#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
#if LWIP_ALTCP_TLS
#include "lwip/altcp.h"
#ifdef __cplusplus
extern "C" {
#endif
/** @ingroup altcp_tls
* ALTCP_TLS configuration handle, content depends on port (e.g. mbedtls)
*/
struct altcp_tls_config;
/** @ingroup altcp_tls
* Create an ALTCP_TLS server configuration handle
*/
struct altcp_tls_config *altcp_tls_create_config_server_privkey_cert(const u8_t *privkey, size_t privkey_len,
const u8_t *privkey_pass, size_t privkey_pass_len,
const u8_t *cert, size_t cert_len);
/** @ingroup altcp_tls
* Create an ALTCP_TLS client configuration handle
*/
struct altcp_tls_config *altcp_tls_create_config_client(const u8_t *cert, size_t cert_len);
/** @ingroup altcp_tls
* Create an ALTCP_TLS client configuration handle with two-way server/client authentication
*/
struct altcp_tls_config *altcp_tls_create_config_client_2wayauth(const u8_t *ca, size_t ca_len, const u8_t *privkey, size_t privkey_len,
const u8_t *privkey_pass, size_t privkey_pass_len,
const u8_t *cert, size_t cert_len);
/** @ingroup altcp_tls
* Free an ALTCP_TLS configuration handle
*/
void altcp_tls_free_config(struct altcp_tls_config *conf);
/** @ingroup altcp_tls
* Create new ALTCP_TLS layer wrapping an existing pcb as inner connection (e.g. TLS over TCP)
*/
struct altcp_pcb *altcp_tls_wrap(struct altcp_tls_config *config, struct altcp_pcb *inner_pcb);
/** @ingroup altcp_tls
* Create new ALTCP_TLS pcb and its inner tcp pcb
*/
struct altcp_pcb *altcp_tls_new(struct altcp_tls_config *config, u8_t ip_type);
/** @ingroup altcp_tls
* Create new ALTCP_TLS layer pcb and its inner tcp pcb.
* Same as @ref altcp_tls_new but this allocator function fits to
* @ref altcp_allocator_t / @ref altcp_new.\n
'arg' must contain a struct altcp_tls_config *.
*/
struct altcp_pcb *altcp_tls_alloc(void *arg, u8_t ip_type);
/** @ingroup altcp_tls
* Return pointer to internal TLS context so application can tweak it.
* Real type depends on port (e.g. mbedtls)
*/
void *altcp_tls_context(struct altcp_pcb *conn);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_ALTCP_TLS */
#endif /* LWIP_ALTCP */
#endif /* LWIP_HDR_ALTCP_TLS_H */

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/**
* @file
* netconn API (to be used from non-TCPIP threads)
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_API_H
#define LWIP_HDR_API_H
#include "lwip/opt.h"
#if LWIP_NETCONN || LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
/* Note: Netconn API is always available when sockets are enabled -
* sockets are implemented on top of them */
#include "lwip/arch.h"
#include "lwip/netbuf.h"
#include "lwip/sys.h"
#include "lwip/ip_addr.h"
#include "lwip/err.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Throughout this file, IP addresses and port numbers are expected to be in
* the same byte order as in the corresponding pcb.
*/
/* Flags for netconn_write (u8_t) */
#define NETCONN_NOFLAG 0x00
#define NETCONN_NOCOPY 0x00 /* Only for source code compatibility */
#define NETCONN_COPY 0x01
#define NETCONN_MORE 0x02
#define NETCONN_DONTBLOCK 0x04
#define NETCONN_NOAUTORCVD 0x08 /* prevent netconn_recv_data_tcp() from updating the tcp window - must be done manually via netconn_tcp_recvd() */
#define NETCONN_NOFIN 0x10 /* upper layer already received data, leave FIN in queue until called again */
/* Flags for struct netconn.flags (u8_t) */
/** This netconn had an error, don't block on recvmbox/acceptmbox any more */
#define NETCONN_FLAG_MBOXCLOSED 0x01
/** Should this netconn avoid blocking? */
#define NETCONN_FLAG_NON_BLOCKING 0x02
/** Was the last connect action a non-blocking one? */
#define NETCONN_FLAG_IN_NONBLOCKING_CONNECT 0x04
#if LWIP_NETCONN_FULLDUPLEX
/** The mbox of this netconn is being deallocated, don't use it anymore */
#define NETCONN_FLAG_MBOXINVALID 0x08
#endif /* LWIP_NETCONN_FULLDUPLEX */
/** If a nonblocking write has been rejected before, poll_tcp needs to
check if the netconn is writable again */
#define NETCONN_FLAG_CHECK_WRITESPACE 0x10
#if LWIP_IPV6
/** If this flag is set then only IPv6 communication is allowed on the
netconn. As per RFC#3493 this features defaults to OFF allowing
dual-stack usage by default. */
#define NETCONN_FLAG_IPV6_V6ONLY 0x20
#endif /* LWIP_IPV6 */
#if LWIP_NETBUF_RECVINFO
/** Received packet info will be recorded for this netconn */
#define NETCONN_FLAG_PKTINFO 0x40
#endif /* LWIP_NETBUF_RECVINFO */
/** A FIN has been received but not passed to the application yet */
#define NETCONN_FIN_RX_PENDING 0x80
/* Helpers to process several netconn_types by the same code */
#define NETCONNTYPE_GROUP(t) ((t)&0xF0)
#define NETCONNTYPE_DATAGRAM(t) ((t)&0xE0)
#if LWIP_IPV6
#define NETCONN_TYPE_IPV6 0x08
#define NETCONNTYPE_ISIPV6(t) (((t)&NETCONN_TYPE_IPV6) != 0)
#define NETCONNTYPE_ISUDPLITE(t) (((t)&0xF3) == NETCONN_UDPLITE)
#define NETCONNTYPE_ISUDPNOCHKSUM(t) (((t)&0xF3) == NETCONN_UDPNOCHKSUM)
#else /* LWIP_IPV6 */
#define NETCONNTYPE_ISIPV6(t) (0)
#define NETCONNTYPE_ISUDPLITE(t) ((t) == NETCONN_UDPLITE)
#define NETCONNTYPE_ISUDPNOCHKSUM(t) ((t) == NETCONN_UDPNOCHKSUM)
#endif /* LWIP_IPV6 */
/** @ingroup netconn_common
* Protocol family and type of the netconn
*/
enum netconn_type {
NETCONN_INVALID = 0,
/** TCP IPv4 */
NETCONN_TCP = 0x10,
#if LWIP_IPV6
/** TCP IPv6 */
NETCONN_TCP_IPV6 = NETCONN_TCP | NETCONN_TYPE_IPV6 /* 0x18 */,
#endif /* LWIP_IPV6 */
/** UDP IPv4 */
NETCONN_UDP = 0x20,
/** UDP IPv4 lite */
NETCONN_UDPLITE = 0x21,
/** UDP IPv4 no checksum */
NETCONN_UDPNOCHKSUM = 0x22,
#if LWIP_IPV6
/** UDP IPv6 (dual-stack by default, unless you call @ref netconn_set_ipv6only) */
NETCONN_UDP_IPV6 = NETCONN_UDP | NETCONN_TYPE_IPV6 /* 0x28 */,
/** UDP IPv6 lite (dual-stack by default, unless you call @ref netconn_set_ipv6only) */
NETCONN_UDPLITE_IPV6 = NETCONN_UDPLITE | NETCONN_TYPE_IPV6 /* 0x29 */,
/** UDP IPv6 no checksum (dual-stack by default, unless you call @ref netconn_set_ipv6only) */
NETCONN_UDPNOCHKSUM_IPV6 = NETCONN_UDPNOCHKSUM | NETCONN_TYPE_IPV6 /* 0x2a */,
#endif /* LWIP_IPV6 */
/** Raw connection IPv4 */
NETCONN_RAW = 0x40
#if LWIP_IPV6
/** Raw connection IPv6 (dual-stack by default, unless you call @ref netconn_set_ipv6only) */
, NETCONN_RAW_IPV6 = NETCONN_RAW | NETCONN_TYPE_IPV6 /* 0x48 */
#endif /* LWIP_IPV6 */
};
/** Current state of the netconn. Non-TCP netconns are always
* in state NETCONN_NONE! */
enum netconn_state {
NETCONN_NONE,
NETCONN_WRITE,
NETCONN_LISTEN,
NETCONN_CONNECT,
NETCONN_CLOSE
};
/** Used to inform the callback function about changes
*
* Event explanation:
*
* In the netconn implementation, there are three ways to block a client:
*
* - accept mbox (sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, 0); in netconn_accept())
* - receive mbox (sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0); in netconn_recv_data())
* - send queue is full (sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); in lwip_netconn_do_write())
*
* The events have to be seen as events signaling the state of these mboxes/semaphores. For non-blocking
* connections, you need to know in advance whether a call to a netconn function call would block or not,
* and these events tell you about that.
*
* RCVPLUS events say: Safe to perform a potentially blocking call call once more.
* They are counted in sockets - three RCVPLUS events for accept mbox means you are safe
* to call netconn_accept 3 times without being blocked.
* Same thing for receive mbox.
*
* RCVMINUS events say: Your call to to a possibly blocking function is "acknowledged".
* Socket implementation decrements the counter.
*
* For TX, there is no need to count, its merely a flag. SENDPLUS means you may send something.
* SENDPLUS occurs when enough data was delivered to peer so netconn_send() can be called again.
* A SENDMINUS event occurs when the next call to a netconn_send() would be blocking.
*/
enum netconn_evt {
NETCONN_EVT_RCVPLUS,
NETCONN_EVT_RCVMINUS,
NETCONN_EVT_SENDPLUS,
NETCONN_EVT_SENDMINUS,
NETCONN_EVT_ERROR
};
#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
/** Used for netconn_join_leave_group() */
enum netconn_igmp {
NETCONN_JOIN,
NETCONN_LEAVE
};
#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
#if LWIP_DNS
/* Used for netconn_gethostbyname_addrtype(), these should match the DNS_ADDRTYPE defines in dns.h */
#define NETCONN_DNS_DEFAULT NETCONN_DNS_IPV4_IPV6
#define NETCONN_DNS_IPV4 0
#define NETCONN_DNS_IPV6 1
#define NETCONN_DNS_IPV4_IPV6 2 /* try to resolve IPv4 first, try IPv6 if IPv4 fails only */
#define NETCONN_DNS_IPV6_IPV4 3 /* try to resolve IPv6 first, try IPv4 if IPv6 fails only */
#endif /* LWIP_DNS */
/* forward-declare some structs to avoid to include their headers */
struct ip_pcb;
struct tcp_pcb;
struct udp_pcb;
struct raw_pcb;
struct netconn;
struct api_msg;
/** A callback prototype to inform about events for a netconn */
typedef void (* netconn_callback)(struct netconn *, enum netconn_evt, u16_t len);
/** A netconn descriptor */
struct netconn {
/** type of the netconn (TCP, UDP or RAW) */
enum netconn_type type;
/** current state of the netconn */
enum netconn_state state;
/** the lwIP internal protocol control block */
union {
struct ip_pcb *ip;
struct tcp_pcb *tcp;
struct udp_pcb *udp;
struct raw_pcb *raw;
} pcb;
/** the last asynchronous unreported error this netconn had */
err_t pending_err;
#if !LWIP_NETCONN_SEM_PER_THREAD
/** sem that is used to synchronously execute functions in the core context */
sys_sem_t op_completed;
#endif
/** mbox where received packets are stored until they are fetched
by the netconn application thread (can grow quite big) */
sys_mbox_t recvmbox;
#if LWIP_TCP
/** mbox where new connections are stored until processed
by the application thread */
sys_mbox_t acceptmbox;
#endif /* LWIP_TCP */
#if LWIP_NETCONN_FULLDUPLEX
/** number of threads waiting on an mbox. This is required to unblock
all threads when closing while threads are waiting. */
int mbox_threads_waiting;
#endif
/** only used for socket layer */
#if LWIP_SOCKET
int socket;
#endif /* LWIP_SOCKET */
#if LWIP_SO_SNDTIMEO
/** timeout to wait for sending data (which means enqueueing data for sending
in internal buffers) in milliseconds */
s32_t send_timeout;
#endif /* LWIP_SO_RCVTIMEO */
#if LWIP_SO_RCVTIMEO
/** timeout in milliseconds to wait for new data to be received
(or connections to arrive for listening netconns) */
u32_t recv_timeout;
#endif /* LWIP_SO_RCVTIMEO */
#if LWIP_SO_RCVBUF
/** maximum amount of bytes queued in recvmbox
not used for TCP: adjust TCP_WND instead! */
int recv_bufsize;
/** number of bytes currently in recvmbox to be received,
tested against recv_bufsize to limit bytes on recvmbox
for UDP and RAW, used for FIONREAD */
int recv_avail;
#endif /* LWIP_SO_RCVBUF */
#if LWIP_SO_LINGER
/** values <0 mean linger is disabled, values > 0 are seconds to linger */
s16_t linger;
#endif /* LWIP_SO_LINGER */
/** flags holding more netconn-internal state, see NETCONN_FLAG_* defines */
u8_t flags;
#if LWIP_TCP
/** TCP: when data passed to netconn_write doesn't fit into the send buffer,
this temporarily stores the message.
Also used during connect and close. */
struct api_msg *current_msg;
#endif /* LWIP_TCP */
/** A callback function that is informed about events for this netconn */
netconn_callback callback;
};
/** This vector type is passed to @ref netconn_write_vectors_partly to send
* multiple buffers at once.
* ATTENTION: This type has to directly map struct iovec since one is casted
* into the other!
*/
struct netvector {
/** pointer to the application buffer that contains the data to send */
const void *ptr;
/** size of the application data to send */
size_t len;
};
/** Register an Network connection event */
#define API_EVENT(c,e,l) if (c->callback) { \
(*c->callback)(c, e, l); \
}
/* Network connection functions: */
/** @ingroup netconn_common
* Create new netconn connection
* @param t @ref netconn_type */
#define netconn_new(t) netconn_new_with_proto_and_callback(t, 0, NULL)
#define netconn_new_with_callback(t, c) netconn_new_with_proto_and_callback(t, 0, c)
struct netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto,
netconn_callback callback);
err_t netconn_prepare_delete(struct netconn *conn);
err_t netconn_delete(struct netconn *conn);
/** Get the type of a netconn (as enum netconn_type). */
#define netconn_type(conn) (conn->type)
err_t netconn_getaddr(struct netconn *conn, ip_addr_t *addr,
u16_t *port, u8_t local);
/** @ingroup netconn_common */
#define netconn_peer(c,i,p) netconn_getaddr(c,i,p,0)
/** @ingroup netconn_common */
#define netconn_addr(c,i,p) netconn_getaddr(c,i,p,1)
err_t netconn_bind(struct netconn *conn, const ip_addr_t *addr, u16_t port);
err_t netconn_bind_if(struct netconn *conn, u8_t if_idx);
err_t netconn_connect(struct netconn *conn, const ip_addr_t *addr, u16_t port);
err_t netconn_disconnect (struct netconn *conn);
err_t netconn_listen_with_backlog(struct netconn *conn, u8_t backlog);
/** @ingroup netconn_tcp */
#define netconn_listen(conn) netconn_listen_with_backlog(conn, TCP_DEFAULT_LISTEN_BACKLOG)
err_t netconn_accept(struct netconn *conn, struct netconn **new_conn);
err_t netconn_recv(struct netconn *conn, struct netbuf **new_buf);
err_t netconn_recv_udp_raw_netbuf(struct netconn *conn, struct netbuf **new_buf);
err_t netconn_recv_udp_raw_netbuf_flags(struct netconn *conn, struct netbuf **new_buf, u8_t apiflags);
err_t netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf);
err_t netconn_recv_tcp_pbuf_flags(struct netconn *conn, struct pbuf **new_buf, u8_t apiflags);
err_t netconn_tcp_recvd(struct netconn *conn, size_t len);
err_t netconn_sendto(struct netconn *conn, struct netbuf *buf,
const ip_addr_t *addr, u16_t port);
err_t netconn_send(struct netconn *conn, struct netbuf *buf);
err_t netconn_write_partly(struct netconn *conn, const void *dataptr, size_t size,
u8_t apiflags, size_t *bytes_written);
err_t netconn_write_vectors_partly(struct netconn *conn, struct netvector *vectors, u16_t vectorcnt,
u8_t apiflags, size_t *bytes_written);
/** @ingroup netconn_tcp */
#define netconn_write(conn, dataptr, size, apiflags) \
netconn_write_partly(conn, dataptr, size, apiflags, NULL)
err_t netconn_close(struct netconn *conn);
err_t netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx);
#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
err_t netconn_join_leave_group(struct netconn *conn, const ip_addr_t *multiaddr,
const ip_addr_t *netif_addr, enum netconn_igmp join_or_leave);
err_t netconn_join_leave_group_netif(struct netconn *conn, const ip_addr_t *multiaddr,
u8_t if_idx, enum netconn_igmp join_or_leave);
#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
#if LWIP_DNS
#if LWIP_IPV4 && LWIP_IPV6
err_t netconn_gethostbyname_addrtype(const char *name, ip_addr_t *addr, u8_t dns_addrtype);
#define netconn_gethostbyname(name, addr) netconn_gethostbyname_addrtype(name, addr, NETCONN_DNS_DEFAULT)
#else /* LWIP_IPV4 && LWIP_IPV6 */
err_t netconn_gethostbyname(const char *name, ip_addr_t *addr);
#define netconn_gethostbyname_addrtype(name, addr, dns_addrtype) netconn_gethostbyname(name, addr)
#endif /* LWIP_IPV4 && LWIP_IPV6 */
#endif /* LWIP_DNS */
err_t netconn_err(struct netconn *conn);
#define netconn_recv_bufsize(conn) ((conn)->recv_bufsize)
#define netconn_set_flags(conn, set_flags) do { (conn)->flags = (u8_t)((conn)->flags | (set_flags)); } while(0)
#define netconn_clear_flags(conn, clr_flags) do { (conn)->flags = (u8_t)((conn)->flags & (u8_t)(~(clr_flags) & 0xff)); } while(0)
#define netconn_is_flag_set(conn, flag) (((conn)->flags & (flag)) != 0)
/** Set the blocking status of netconn calls (@todo: write/send is missing) */
#define netconn_set_nonblocking(conn, val) do { if(val) { \
netconn_set_flags(conn, NETCONN_FLAG_NON_BLOCKING); \
} else { \
netconn_clear_flags(conn, NETCONN_FLAG_NON_BLOCKING); }} while(0)
/** Get the blocking status of netconn calls (@todo: write/send is missing) */
#define netconn_is_nonblocking(conn) (((conn)->flags & NETCONN_FLAG_NON_BLOCKING) != 0)
#if LWIP_IPV6
/** @ingroup netconn_common
* TCP: Set the IPv6 ONLY status of netconn calls (see NETCONN_FLAG_IPV6_V6ONLY)
*/
#define netconn_set_ipv6only(conn, val) do { if(val) { \
netconn_set_flags(conn, NETCONN_FLAG_IPV6_V6ONLY); \
} else { \
netconn_clear_flags(conn, NETCONN_FLAG_IPV6_V6ONLY); }} while(0)
/** @ingroup netconn_common
* TCP: Get the IPv6 ONLY status of netconn calls (see NETCONN_FLAG_IPV6_V6ONLY)
*/
#define netconn_get_ipv6only(conn) (((conn)->flags & NETCONN_FLAG_IPV6_V6ONLY) != 0)
#endif /* LWIP_IPV6 */
#if LWIP_SO_SNDTIMEO
/** Set the send timeout in milliseconds */
#define netconn_set_sendtimeout(conn, timeout) ((conn)->send_timeout = (timeout))
/** Get the send timeout in milliseconds */
#define netconn_get_sendtimeout(conn) ((conn)->send_timeout)
#endif /* LWIP_SO_SNDTIMEO */
#if LWIP_SO_RCVTIMEO
/** Set the receive timeout in milliseconds */
#define netconn_set_recvtimeout(conn, timeout) ((conn)->recv_timeout = (timeout))
/** Get the receive timeout in milliseconds */
#define netconn_get_recvtimeout(conn) ((conn)->recv_timeout)
#endif /* LWIP_SO_RCVTIMEO */
#if LWIP_SO_RCVBUF
/** Set the receive buffer in bytes */
#define netconn_set_recvbufsize(conn, recvbufsize) ((conn)->recv_bufsize = (recvbufsize))
/** Get the receive buffer in bytes */
#define netconn_get_recvbufsize(conn) ((conn)->recv_bufsize)
#endif /* LWIP_SO_RCVBUF*/
#if LWIP_NETCONN_SEM_PER_THREAD
void netconn_thread_init(void);
void netconn_thread_cleanup(void);
#else /* LWIP_NETCONN_SEM_PER_THREAD */
#define netconn_thread_init()
#define netconn_thread_cleanup()
#endif /* LWIP_NETCONN_SEM_PER_THREAD */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_NETCONN || LWIP_SOCKET */
#endif /* LWIP_HDR_API_H */

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This directory contains application headers.
Every application shall provide one api file APP.h and optionally one options file APP_opts.h

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/**
* @file
* Application layered TCP connection API that executes a proxy-connect.
*
* This file provides a starting layer that executes a proxy-connect e.g. to
* set up TLS connections through a http proxy.
*/
/*
* Copyright (c) 2018 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#ifndef LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H
#define LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H
#include "lwip/opt.h"
#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
#include "lwip/ip_addr.h"
#ifdef __cplusplus
extern "C" {
#endif
struct altcp_proxyconnect_config {
ip_addr_t proxy_addr;
u16_t proxy_port;
};
struct altcp_pcb *altcp_proxyconnect_new(struct altcp_proxyconnect_config *config, struct altcp_pcb *inner_pcb);
struct altcp_pcb *altcp_proxyconnect_new_tcp(struct altcp_proxyconnect_config *config, u8_t ip_type);
struct altcp_pcb *altcp_proxyconnect_alloc(void *arg, u8_t ip_type);
#if LWIP_ALTCP_TLS
struct altcp_proxyconnect_tls_config {
struct altcp_proxyconnect_config proxy;
struct altcp_tls_config *tls_config;
};
struct altcp_pcb *altcp_proxyconnect_tls_alloc(void *arg, u8_t ip_type);
#endif /* LWIP_ALTCP_TLS */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_ALTCP */
#endif /* LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H */

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/**
* @file
* Application layered TCP/TLS connection API (to be used from TCPIP thread)
*
* This file contains options for an mbedtls port of the TLS layer.
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#ifndef LWIP_HDR_ALTCP_TLS_OPTS_H
#define LWIP_HDR_ALTCP_TLS_OPTS_H
#include "lwip/opt.h"
#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
/** LWIP_ALTCP_TLS_MBEDTLS==1: use mbedTLS for TLS support for altcp API
* mbedtls include directory must be reachable via include search path
*/
#ifndef LWIP_ALTCP_TLS_MBEDTLS
#define LWIP_ALTCP_TLS_MBEDTLS 0
#endif
/** Configure debug level of this file */
#ifndef ALTCP_MBEDTLS_DEBUG
#define ALTCP_MBEDTLS_DEBUG LWIP_DBG_OFF
#endif
/** Set a session timeout in seconds for the basic session cache
* ATTENTION: Using a session cache can lower security by reusing keys!
*/
#ifndef ALTCP_MBEDTLS_SESSION_CACHE_TIMEOUT_SECONDS
#define ALTCP_MBEDTLS_SESSION_CACHE_TIMEOUT_SECONDS 0
#endif
#endif /* LWIP_ALTCP */
#endif /* LWIP_HDR_ALTCP_TLS_OPTS_H */

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/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_APPS_FS_H
#define LWIP_HDR_APPS_FS_H
#include "httpd_opts.h"
#include "lwip/err.h"
#ifdef __cplusplus
extern "C" {
#endif
#define FS_READ_EOF -1
#define FS_READ_DELAYED -2
#if HTTPD_PRECALCULATED_CHECKSUM
struct fsdata_chksum {
u32_t offset;
u16_t chksum;
u16_t len;
};
#endif /* HTTPD_PRECALCULATED_CHECKSUM */
#define FS_FILE_FLAGS_HEADER_INCLUDED 0x01
#define FS_FILE_FLAGS_HEADER_PERSISTENT 0x02
#define FS_FILE_FLAGS_HEADER_HTTPVER_1_1 0x04
#define FS_FILE_FLAGS_SSI 0x08
/** Define FS_FILE_EXTENSION_T_DEFINED if you have typedef'ed to your private
* pointer type (defaults to 'void' so the default usage is 'void*')
*/
#ifndef FS_FILE_EXTENSION_T_DEFINED
typedef void fs_file_extension;
#endif
struct fs_file {
const char *data;
int len;
int index;
/* pextension is free for implementations to hold private (extensional)
arbitrary data, e.g. holding some file state or file system handle */
fs_file_extension *pextension;
#if HTTPD_PRECALCULATED_CHECKSUM
const struct fsdata_chksum *chksum;
u16_t chksum_count;
#endif /* HTTPD_PRECALCULATED_CHECKSUM */
u8_t flags;
#if LWIP_HTTPD_CUSTOM_FILES
u8_t is_custom_file;
#endif /* LWIP_HTTPD_CUSTOM_FILES */
#if LWIP_HTTPD_FILE_STATE
void *state;
#endif /* LWIP_HTTPD_FILE_STATE */
};
#if LWIP_HTTPD_FS_ASYNC_READ
typedef void (*fs_wait_cb)(void *arg);
#endif /* LWIP_HTTPD_FS_ASYNC_READ */
err_t fs_open(struct fs_file *file, const char *name);
void fs_close(struct fs_file *file);
#if LWIP_HTTPD_DYNAMIC_FILE_READ
#if LWIP_HTTPD_FS_ASYNC_READ
int fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg);
#else /* LWIP_HTTPD_FS_ASYNC_READ */
int fs_read(struct fs_file *file, char *buffer, int count);
#endif /* LWIP_HTTPD_FS_ASYNC_READ */
#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
#if LWIP_HTTPD_FS_ASYNC_READ
int fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
#endif /* LWIP_HTTPD_FS_ASYNC_READ */
int fs_bytes_left(struct fs_file *file);
#if LWIP_HTTPD_FILE_STATE
/** This user-defined function is called when a file is opened. */
void *fs_state_init(struct fs_file *file, const char *name);
/** This user-defined function is called when a file is closed. */
void fs_state_free(struct fs_file *file, void *state);
#endif /* #if LWIP_HTTPD_FILE_STATE */
struct fsdata_file {
const struct fsdata_file *next;
const unsigned char *name;
const unsigned char *data;
int len;
u8_t flags;
#if HTTPD_PRECALCULATED_CHECKSUM
u16_t chksum_count;
const struct fsdata_chksum *chksum;
#endif /* HTTPD_PRECALCULATED_CHECKSUM */
};
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_FS_H */

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/**
* @file
* HTTP client
*/
/*
* Copyright (c) 2018 Simon Goldschmidt <goldsimon@gmx.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#ifndef LWIP_HDR_APPS_HTTP_CLIENT_H
#define LWIP_HDR_APPS_HTTP_CLIENT_H
#include "lwip/opt.h"
#include "lwip/ip_addr.h"
#include "lwip/err.h"
#include "lwip/altcp.h"
#include "lwip/prot/iana.h"
#include "lwip/pbuf.h"
#if LWIP_TCP && LWIP_CALLBACK_API
#ifdef __cplusplus
extern "C" {
#endif
/**
* @ingroup httpc
* HTTPC_HAVE_FILE_IO: define this to 1 to have functions dowloading directly
* to disk via fopen/fwrite.
* These functions are example implementations of the interface only.
*/
#ifndef LWIP_HTTPC_HAVE_FILE_IO
#define LWIP_HTTPC_HAVE_FILE_IO 0
#endif
/**
* @ingroup httpc
* The default TCP port used for HTTP
*/
#define HTTP_DEFAULT_PORT LWIP_IANA_PORT_HTTP
/**
* @ingroup httpc
* HTTP client result codes
*/
typedef enum ehttpc_result {
/** File successfully received */
HTTPC_RESULT_OK = 0,
/** Unknown error */
HTTPC_RESULT_ERR_UNKNOWN = 1,
/** Connection to server failed */
HTTPC_RESULT_ERR_CONNECT = 2,
/** Failed to resolve server hostname */
HTTPC_RESULT_ERR_HOSTNAME = 3,
/** Connection unexpectedly closed by remote server */
HTTPC_RESULT_ERR_CLOSED = 4,
/** Connection timed out (server didn't respond in time) */
HTTPC_RESULT_ERR_TIMEOUT = 5,
/** Server responded with an error code */
HTTPC_RESULT_ERR_SVR_RESP = 6,
/** Local memory error */
HTTPC_RESULT_ERR_MEM = 7,
/** Local abort */
HTTPC_RESULT_LOCAL_ABORT = 8,
/** Content length mismatch */
HTTPC_RESULT_ERR_CONTENT_LEN = 9
} httpc_result_t;
typedef struct _httpc_state httpc_state_t;
/**
* @ingroup httpc
* Prototype of a http client callback function
*
* @param arg argument specified when initiating the request
* @param httpc_result result of the http transfer (see enum httpc_result_t)
* @param rx_content_len number of bytes received (without headers)
* @param srv_res this contains the http status code received (if any)
* @param err an error returned by internal lwip functions, can help to specify
* the source of the error but must not necessarily be != ERR_OK
*/
typedef void (*httpc_result_fn)(void *arg, httpc_result_t httpc_result, u32_t rx_content_len, u32_t srv_res, err_t err);
/**
* @ingroup httpc
* Prototype of http client callback: called when the headers are received
*
* @param connection http client connection
* @param arg argument specified when initiating the request
* @param hdr header pbuf(s) (may contain data also)
* @param hdr_len length of the heders in 'hdr'
* @param content_len content length as received in the headers (-1 if not received)
* @return if != ERR_OK is returned, the connection is aborted
*/
typedef err_t (*httpc_headers_done_fn)(httpc_state_t *connection, void *arg, struct pbuf *hdr, u16_t hdr_len, u32_t content_len);
typedef struct _httpc_connection {
ip_addr_t proxy_addr;
u16_t proxy_port;
u8_t use_proxy;
/* @todo: add username:pass? */
#if LWIP_ALTCP
altcp_allocator_t *altcp_allocator;
#endif
/* this callback is called when the transfer is finished (or aborted) */
httpc_result_fn result_fn;
/* this callback is called after receiving the http headers
It can abort the connection by returning != ERR_OK */
httpc_headers_done_fn headers_done_fn;
} httpc_connection_t;
err_t httpc_get_file(const ip_addr_t* server_addr, u16_t port, const char* uri, const httpc_connection_t *settings,
altcp_recv_fn recv_fn, void* callback_arg, httpc_state_t **connection);
err_t httpc_get_file_dns(const char* server_name, u16_t port, const char* uri, const httpc_connection_t *settings,
altcp_recv_fn recv_fn, void* callback_arg, httpc_state_t **connection);
#if LWIP_HTTPC_HAVE_FILE_IO
err_t httpc_get_file_to_disk(const ip_addr_t* server_addr, u16_t port, const char* uri, const httpc_connection_t *settings,
void* callback_arg, const char* local_file_name, httpc_state_t **connection);
err_t httpc_get_file_dns_to_disk(const char* server_name, u16_t port, const char* uri, const httpc_connection_t *settings,
void* callback_arg, const char* local_file_name, httpc_state_t **connection);
#endif /* LWIP_HTTPC_HAVE_FILE_IO */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_TCP && LWIP_CALLBACK_API */
#endif /* LWIP_HDR_APPS_HTTP_CLIENT_H */

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/**
* @file
* HTTP server
*/
/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
* This version of the file has been modified by Texas Instruments to offer
* simple server-side-include (SSI) and Common Gateway Interface (CGI)
* capability.
*/
#ifndef LWIP_HDR_APPS_HTTPD_H
#define LWIP_HDR_APPS_HTTPD_H
#include "httpd_opts.h"
#include "lwip/err.h"
#include "lwip/pbuf.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_HTTPD_CGI
/**
* @ingroup httpd
* Function pointer for a CGI script handler.
*
* This function is called each time the HTTPD server is asked for a file
* whose name was previously registered as a CGI function using a call to
* http_set_cgi_handlers. The iIndex parameter provides the index of the
* CGI within the cgis array passed to http_set_cgi_handlers. Parameters
* pcParam and pcValue provide access to the parameters provided along with
* the URI. iNumParams provides a count of the entries in the pcParam and
* pcValue arrays. Each entry in the pcParam array contains the name of a
* parameter with the corresponding entry in the pcValue array containing the
* value for that parameter. Note that pcParam may contain multiple elements
* with the same name if, for example, a multi-selection list control is used
* in the form generating the data.
*
* The function should return a pointer to a character string which is the
* path and filename of the response that is to be sent to the connected
* browser, for example "/thanks.htm" or "/response/error.ssi".
*
* The maximum number of parameters that will be passed to this function via
* iNumParams is defined by LWIP_HTTPD_MAX_CGI_PARAMETERS. Any parameters in
* the incoming HTTP request above this number will be discarded.
*
* Requests intended for use by this CGI mechanism must be sent using the GET
* method (which encodes all parameters within the URI rather than in a block
* later in the request). Attempts to use the POST method will result in the
* request being ignored.
*
*/
typedef const char *(*tCGIHandler)(int iIndex, int iNumParams, char *pcParam[],
char *pcValue[]);
/**
* @ingroup httpd
* Structure defining the base filename (URL) of a CGI and the associated
* function which is to be called when that URL is requested.
*/
typedef struct
{
const char *pcCGIName;
tCGIHandler pfnCGIHandler;
} tCGI;
void http_set_cgi_handlers(const tCGI *pCGIs, int iNumHandlers);
#endif /* LWIP_HTTPD_CGI */
#if LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI
#if LWIP_HTTPD_CGI_SSI
/* we have to prototype this struct here to make it available for the handler */
struct fs_file;
/** Define this generic CGI handler in your application.
* It is called once for every URI with parameters.
* The parameters can be stored to the object passed as connection_state, which
* is allocated to file->state via fs_state_init() from fs_open() or fs_open_custom().
* Content creation via SSI or complete dynamic files can retrieve the CGI params from there.
*/
extern void httpd_cgi_handler(struct fs_file *file, const char* uri, int iNumParams,
char **pcParam, char **pcValue
#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
, void *connection_state
#endif /* LWIP_HTTPD_FILE_STATE */
);
#endif /* LWIP_HTTPD_CGI_SSI */
#endif /* LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI */
#if LWIP_HTTPD_SSI
/**
* @ingroup httpd
* Function pointer for the SSI tag handler callback.
*
* This function will be called each time the HTTPD server detects a tag of the
* form <!--#name--> in files with extensions mentioned in the g_pcSSIExtensions
* array (currently .shtml, .shtm, .ssi, .xml, .json) where "name" appears as
* one of the tags supplied to http_set_ssi_handler in the tags array. The
* returned insert string, which will be appended after the the string
* "<!--#name-->" in file sent back to the client, should be written to pointer
* pcInsert. iInsertLen contains the size of the buffer pointed to by
* pcInsert. The iIndex parameter provides the zero-based index of the tag as
* found in the tags array and identifies the tag that is to be processed.
*
* The handler returns the number of characters written to pcInsert excluding
* any terminating NULL or HTTPD_SSI_TAG_UNKNOWN when tag is not recognized.
*
* Note that the behavior of this SSI mechanism is somewhat different from the
* "normal" SSI processing as found in, for example, the Apache web server. In
* this case, the inserted text is appended following the SSI tag rather than
* replacing the tag entirely. This allows for an implementation that does not
* require significant additional buffering of output data yet which will still
* offer usable SSI functionality. One downside to this approach is when
* attempting to use SSI within JavaScript. The SSI tag is structured to
* resemble an HTML comment but this syntax does not constitute a comment
* within JavaScript and, hence, leaving the tag in place will result in
* problems in these cases. In order to avoid these problems, define
* LWIP_HTTPD_SSI_INCLUDE_TAG as zero in your lwip options file, or use JavaScript
* style block comments in the form / * # name * / (without the spaces).
*/
typedef u16_t (*tSSIHandler)(
#if LWIP_HTTPD_SSI_RAW
const char* ssi_tag_name,
#else /* LWIP_HTTPD_SSI_RAW */
int iIndex,
#endif /* LWIP_HTTPD_SSI_RAW */
char *pcInsert, int iInsertLen
#if LWIP_HTTPD_SSI_MULTIPART
, u16_t current_tag_part, u16_t *next_tag_part
#endif /* LWIP_HTTPD_SSI_MULTIPART */
#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
, void *connection_state
#endif /* LWIP_HTTPD_FILE_STATE */
);
/** Set the SSI handler function
* (if LWIP_HTTPD_SSI_RAW==1, only the first argument is used)
*/
void http_set_ssi_handler(tSSIHandler pfnSSIHandler,
const char **ppcTags, int iNumTags);
/** For LWIP_HTTPD_SSI_RAW==1, return this to indicate the tag is unknown.
* In this case, the webserver writes a warning into the page.
* You can also just return 0 to write nothing for unknown tags.
*/
#define HTTPD_SSI_TAG_UNKNOWN 0xFFFF
#endif /* LWIP_HTTPD_SSI */
#if LWIP_HTTPD_SUPPORT_POST
/* These functions must be implemented by the application */
/**
* @ingroup httpd
* Called when a POST request has been received. The application can decide
* whether to accept it or not.
*
* @param connection Unique connection identifier, valid until httpd_post_end
* is called.
* @param uri The HTTP header URI receiving the POST request.
* @param http_request The raw HTTP request (the first packet, normally).
* @param http_request_len Size of 'http_request'.
* @param content_len Content-Length from HTTP header.
* @param response_uri Filename of response file, to be filled when denying the
* request
* @param response_uri_len Size of the 'response_uri' buffer.
* @param post_auto_wnd Set this to 0 to let the callback code handle window
* updates by calling 'httpd_post_data_recved' (to throttle rx speed)
* default is 1 (httpd handles window updates automatically)
* @return ERR_OK: Accept the POST request, data may be passed in
* another err_t: Deny the POST request, send back 'bad request'.
*/
err_t httpd_post_begin(void *connection, const char *uri, const char *http_request,
u16_t http_request_len, int content_len, char *response_uri,
u16_t response_uri_len, u8_t *post_auto_wnd);
/**
* @ingroup httpd
* Called for each pbuf of data that has been received for a POST.
* ATTENTION: The application is responsible for freeing the pbufs passed in!
*
* @param connection Unique connection identifier.
* @param p Received data.
* @return ERR_OK: Data accepted.
* another err_t: Data denied, http_post_get_response_uri will be called.
*/
err_t httpd_post_receive_data(void *connection, struct pbuf *p);
/**
* @ingroup httpd
* Called when all data is received or when the connection is closed.
* The application must return the filename/URI of a file to send in response
* to this POST request. If the response_uri buffer is untouched, a 404
* response is returned.
*
* @param connection Unique connection identifier.
* @param response_uri Filename of response file, to be filled when denying the request
* @param response_uri_len Size of the 'response_uri' buffer.
*/
void httpd_post_finished(void *connection, char *response_uri, u16_t response_uri_len);
#if LWIP_HTTPD_POST_MANUAL_WND
void httpd_post_data_recved(void *connection, u16_t recved_len);
#endif /* LWIP_HTTPD_POST_MANUAL_WND */
#endif /* LWIP_HTTPD_SUPPORT_POST */
void httpd_init(void);
#if HTTPD_ENABLE_HTTPS
struct altcp_tls_config;
void httpd_inits(struct altcp_tls_config *conf);
#endif
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_HTTPD_H */

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/**
* @file
* HTTP server options list
*/
/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
* This version of the file has been modified by Texas Instruments to offer
* simple server-side-include (SSI) and Common Gateway Interface (CGI)
* capability.
*/
#ifndef LWIP_HDR_APPS_HTTPD_OPTS_H
#define LWIP_HDR_APPS_HTTPD_OPTS_H
#include "lwip/opt.h"
#include "lwip/prot/iana.h"
/**
* @defgroup httpd_opts Options
* @ingroup httpd
* @{
*/
/** Set this to 1 to support CGI (old style).
*
* This old style CGI support works by registering an array of URLs and
* associated CGI handler functions (@ref http_set_cgi_handlers).
* This list is scanned just before fs_open is called from request handling.
* The handler can return a new URL that is used internally by the httpd to
* load the returned page (passed to fs_open).
*
* Use this CGI type e.g. to execute specific actions and return a page that
* does not depend on the CGI parameters.
*/
#if !defined LWIP_HTTPD_CGI || defined __DOXYGEN__
#define LWIP_HTTPD_CGI 1
#endif
/** Set this to 1 to support CGI (new style).
*
* This new style CGI support works by calling a global function
* (@ref tCGIHandler) for all URLs that are found. fs_open is called first
* and the URL can not be written by the CGI handler. Instead, this handler gets
* passed the http file state, an object where it can store information derived
* from the CGI URL or parameters. This file state is later passed to SSI, so
* the SSI code can return data depending on CGI input.
*
* Use this CGI handler if you want CGI information passed on to SSI.
*/
#if !defined LWIP_HTTPD_CGI_SSI || defined __DOXYGEN__
#define LWIP_HTTPD_CGI_SSI 0
#endif
/** Set this to 1 to support SSI (Server-Side-Includes)
*
* In contrast to other http servers, this only calls a preregistered callback
* function (@see http_set_ssi_handler) for each tag (in the format of
* <!--#tag-->) encountered in SSI-enabled pages.
* SSI-enabled pages must have one of the predefined SSI-enabled file extensions.
* All files with one of these extensions are parsed when sent.
*
* A downside of the current SSI implementation is that persistent connections
* don't work, as the file length is not known in advance (and httpd currently
* relies on the Content-Length header for persistent connections).
*
* To save memory, the maximum tag length is limited (@see LWIP_HTTPD_MAX_TAG_NAME_LEN).
* To save memory, the maximum insertion string length is limited (@see
* LWIP_HTTPD_MAX_TAG_INSERT_LEN). If this is not enought, @ref LWIP_HTTPD_SSI_MULTIPART
* can be used.
*/
#if !defined LWIP_HTTPD_SSI || defined __DOXYGEN__
#define LWIP_HTTPD_SSI 0
#endif
/** Set this to 1 to implement an SSI tag handler callback that gets a const char*
* to the tag (instead of an index into a pre-registered array of known tags)
* If this is 0, the SSI handler callback function is only called pre-registered tags.
*/
#if !defined LWIP_HTTPD_SSI_RAW || defined __DOXYGEN__
#define LWIP_HTTPD_SSI_RAW 0
#endif
/** Set this to 0 to prevent parsing the file extension at runtime to decide
* if a file should be scanned for SSI tags or not.
* Default is 1 (file extensions are checked using the g_pcSSIExtensions array)
* Set to 2 to override this runtime test function.
*
* This is enabled by default, but if you only use a newer version of makefsdata
* supporting the "-ssi" option, this info is already present in
*/
#if !defined LWIP_HTTPD_SSI_BY_FILE_EXTENSION || defined __DOXYGEN__
#define LWIP_HTTPD_SSI_BY_FILE_EXTENSION 1
#endif
/** Set this to 1 to support HTTP POST */
#if !defined LWIP_HTTPD_SUPPORT_POST || defined __DOXYGEN__
#define LWIP_HTTPD_SUPPORT_POST 0
#endif
/* The maximum number of parameters that the CGI handler can be sent. */
#if !defined LWIP_HTTPD_MAX_CGI_PARAMETERS || defined __DOXYGEN__
#define LWIP_HTTPD_MAX_CGI_PARAMETERS 16
#endif
/** LWIP_HTTPD_SSI_MULTIPART==1: SSI handler function is called with 2 more
* arguments indicating a counter for insert string that are too long to be
* inserted at once: the SSI handler function must then set 'next_tag_part'
* which will be passed back to it in the next call. */
#if !defined LWIP_HTTPD_SSI_MULTIPART || defined __DOXYGEN__
#define LWIP_HTTPD_SSI_MULTIPART 0
#endif
/* The maximum length of the string comprising the SSI tag name
* ATTENTION: tags longer than this are ignored, not truncated!
*/
#if !defined LWIP_HTTPD_MAX_TAG_NAME_LEN || defined __DOXYGEN__
#define LWIP_HTTPD_MAX_TAG_NAME_LEN 8
#endif
/* The maximum length of string that can be returned to replace any given tag
* If this buffer is not long enough, use LWIP_HTTPD_SSI_MULTIPART.
*/
#if !defined LWIP_HTTPD_MAX_TAG_INSERT_LEN || defined __DOXYGEN__
#define LWIP_HTTPD_MAX_TAG_INSERT_LEN 192
#endif
#if !defined LWIP_HTTPD_POST_MANUAL_WND || defined __DOXYGEN__
#define LWIP_HTTPD_POST_MANUAL_WND 0
#endif
/** This string is passed in the HTTP header as "Server: " */
#if !defined HTTPD_SERVER_AGENT || defined __DOXYGEN__
#define HTTPD_SERVER_AGENT "lwIP/" LWIP_VERSION_STRING " (http://savannah.nongnu.org/projects/lwip)"
#endif
/** Set this to 1 if you want to include code that creates HTTP headers
* at runtime. Default is off: HTTP headers are then created statically
* by the makefsdata tool. Static headers mean smaller code size, but
* the (readonly) fsdata will grow a bit as every file includes the HTTP
* header. */
#if !defined LWIP_HTTPD_DYNAMIC_HEADERS || defined __DOXYGEN__
#define LWIP_HTTPD_DYNAMIC_HEADERS 0
#endif
#if !defined HTTPD_DEBUG || defined __DOXYGEN__
#define HTTPD_DEBUG LWIP_DBG_OFF
#endif
/** Set this to 1 to use a memp pool for allocating
* struct http_state instead of the heap.
* If enabled, you'll need to define MEMP_NUM_PARALLEL_HTTPD_CONNS
* (and MEMP_NUM_PARALLEL_HTTPD_SSI_CONNS for SSI) to set the size of
* the pool(s).
*/
#if !defined HTTPD_USE_MEM_POOL || defined __DOXYGEN__
#define HTTPD_USE_MEM_POOL 0
#endif
/** The server port for HTTPD to use */
#if !defined HTTPD_SERVER_PORT || defined __DOXYGEN__
#define HTTPD_SERVER_PORT LWIP_IANA_PORT_HTTP
#endif
/** The https server port for HTTPD to use */
#if !defined HTTPD_SERVER_PORT_HTTPS || defined __DOXYGEN__
#define HTTPD_SERVER_PORT_HTTPS LWIP_IANA_PORT_HTTPS
#endif
/** Enable https support? */
#if !defined HTTPD_ENABLE_HTTPS || defined __DOXYGEN__
#define HTTPD_ENABLE_HTTPS 0
#endif
/** Maximum retries before the connection is aborted/closed.
* - number of times pcb->poll is called -> default is 4*500ms = 2s;
* - reset when pcb->sent is called
*/
#if !defined HTTPD_MAX_RETRIES || defined __DOXYGEN__
#define HTTPD_MAX_RETRIES 4
#endif
/** The poll delay is X*500ms */
#if !defined HTTPD_POLL_INTERVAL || defined __DOXYGEN__
#define HTTPD_POLL_INTERVAL 4
#endif
/** Priority for tcp pcbs created by HTTPD (very low by default).
* Lower priorities get killed first when running out of memory.
*/
#if !defined HTTPD_TCP_PRIO || defined __DOXYGEN__
#define HTTPD_TCP_PRIO TCP_PRIO_MIN
#endif
/** Set this to 1 to enable timing each file sent */
#if !defined LWIP_HTTPD_TIMING || defined __DOXYGEN__
#define LWIP_HTTPD_TIMING 0
#endif
/** Set this to 1 to enable timing each file sent */
#if !defined HTTPD_DEBUG_TIMING || defined __DOXYGEN__
#define HTTPD_DEBUG_TIMING LWIP_DBG_OFF
#endif
/** Set this to one to show error pages when parsing a request fails instead
of simply closing the connection. */
#if !defined LWIP_HTTPD_SUPPORT_EXTSTATUS || defined __DOXYGEN__
#define LWIP_HTTPD_SUPPORT_EXTSTATUS 0
#endif
/** Set this to 0 to drop support for HTTP/0.9 clients (to save some bytes) */
#if !defined LWIP_HTTPD_SUPPORT_V09 || defined __DOXYGEN__
#define LWIP_HTTPD_SUPPORT_V09 1
#endif
/** Set this to 1 to enable HTTP/1.1 persistent connections.
* ATTENTION: If the generated file system includes HTTP headers, these must
* include the "Connection: keep-alive" header (pass argument "-11" to makefsdata).
*/
#if !defined LWIP_HTTPD_SUPPORT_11_KEEPALIVE || defined __DOXYGEN__
#define LWIP_HTTPD_SUPPORT_11_KEEPALIVE 0
#endif
/** Set this to 1 to support HTTP request coming in in multiple packets/pbufs */
#if !defined LWIP_HTTPD_SUPPORT_REQUESTLIST || defined __DOXYGEN__
#define LWIP_HTTPD_SUPPORT_REQUESTLIST 1
#endif
#if LWIP_HTTPD_SUPPORT_REQUESTLIST
/** Number of rx pbufs to enqueue to parse an incoming request (up to the first
newline) */
#if !defined LWIP_HTTPD_REQ_QUEUELEN || defined __DOXYGEN__
#define LWIP_HTTPD_REQ_QUEUELEN 5
#endif
/** Number of (TCP payload-) bytes (in pbufs) to enqueue to parse and incoming
request (up to the first double-newline) */
#if !defined LWIP_HTTPD_REQ_BUFSIZE || defined __DOXYGEN__
#define LWIP_HTTPD_REQ_BUFSIZE LWIP_HTTPD_MAX_REQ_LENGTH
#endif
/** Defines the maximum length of a HTTP request line (up to the first CRLF,
copied from pbuf into this a global buffer when pbuf- or packet-queues
are received - otherwise the input pbuf is used directly) */
#if !defined LWIP_HTTPD_MAX_REQ_LENGTH || defined __DOXYGEN__
#define LWIP_HTTPD_MAX_REQ_LENGTH LWIP_MIN(1023, (LWIP_HTTPD_REQ_QUEUELEN * PBUF_POOL_BUFSIZE))
#endif
#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
/** This is the size of a static buffer used when URIs end with '/'.
* In this buffer, the directory requested is concatenated with all the
* configured default file names.
* Set to 0 to disable checking default filenames on non-root directories.
*/
#if !defined LWIP_HTTPD_MAX_REQUEST_URI_LEN || defined __DOXYGEN__
#define LWIP_HTTPD_MAX_REQUEST_URI_LEN 63
#endif
/** Maximum length of the filename to send as response to a POST request,
* filled in by the application when a POST is finished.
*/
#if !defined LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN || defined __DOXYGEN__
#define LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN 63
#endif
/** Set this to 0 to not send the SSI tag (default is on, so the tag will
* be sent in the HTML page */
#if !defined LWIP_HTTPD_SSI_INCLUDE_TAG || defined __DOXYGEN__
#define LWIP_HTTPD_SSI_INCLUDE_TAG 1
#endif
/** Set this to 1 to call tcp_abort when tcp_close fails with memory error.
* This can be used to prevent consuming all memory in situations where the
* HTTP server has low priority compared to other communication. */
#if !defined LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR || defined __DOXYGEN__
#define LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR 0
#endif
/** Set this to 1 to kill the oldest connection when running out of
* memory for 'struct http_state' or 'struct http_ssi_state'.
* ATTENTION: This puts all connections on a linked list, so may be kind of slow.
*/
#if !defined LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED || defined __DOXYGEN__
#define LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED 0
#endif
/** Set this to 1 to send URIs without extension without headers
* (who uses this at all??) */
#if !defined LWIP_HTTPD_OMIT_HEADER_FOR_EXTENSIONLESS_URI || defined __DOXYGEN__
#define LWIP_HTTPD_OMIT_HEADER_FOR_EXTENSIONLESS_URI 0
#endif
/** Default: Tags are sent from struct http_state and are therefore volatile */
#if !defined HTTP_IS_TAG_VOLATILE || defined __DOXYGEN__
#define HTTP_IS_TAG_VOLATILE(ptr) TCP_WRITE_FLAG_COPY
#endif
/* By default, the httpd is limited to send 2*pcb->mss to keep resource usage low
when http is not an important protocol in the device. */
#if !defined HTTPD_LIMIT_SENDING_TO_2MSS || defined __DOXYGEN__
#define HTTPD_LIMIT_SENDING_TO_2MSS 1
#endif
/* Define this to a function that returns the maximum amount of data to enqueue.
The function have this signature: u16_t fn(struct altcp_pcb* pcb);
The best place to define this is the hooks file (@see LWIP_HOOK_FILENAME) */
#if !defined HTTPD_MAX_WRITE_LEN || defined __DOXYGEN__
#if HTTPD_LIMIT_SENDING_TO_2MSS
#define HTTPD_MAX_WRITE_LEN(pcb) ((u16_t)(2 * altcp_mss(pcb)))
#endif
#endif
/*------------------- FS OPTIONS -------------------*/
/** Set this to 1 and provide the functions:
* - "int fs_open_custom(struct fs_file *file, const char *name)"
* Called first for every opened file to allow opening files
* that are not included in fsdata(_custom).c
* - "void fs_close_custom(struct fs_file *file)"
* Called to free resources allocated by fs_open_custom().
*/
#if !defined LWIP_HTTPD_CUSTOM_FILES || defined __DOXYGEN__
#define LWIP_HTTPD_CUSTOM_FILES 0
#endif
/** Set this to 1 to support fs_read() to dynamically read file data.
* Without this (default=off), only one-block files are supported,
* and the contents must be ready after fs_open().
*/
#if !defined LWIP_HTTPD_DYNAMIC_FILE_READ || defined __DOXYGEN__
#define LWIP_HTTPD_DYNAMIC_FILE_READ 0
#endif
/** Set this to 1 to include an application state argument per file
* that is opened. This allows to keep a state per connection/file.
*/
#if !defined LWIP_HTTPD_FILE_STATE || defined __DOXYGEN__
#define LWIP_HTTPD_FILE_STATE 0
#endif
/** HTTPD_PRECALCULATED_CHECKSUM==1: include precompiled checksums for
* predefined (MSS-sized) chunks of the files to prevent having to calculate
* the checksums at runtime. */
#if !defined HTTPD_PRECALCULATED_CHECKSUM || defined __DOXYGEN__
#define HTTPD_PRECALCULATED_CHECKSUM 0
#endif
/** LWIP_HTTPD_FS_ASYNC_READ==1: support asynchronous read operations
* (fs_read_async returns FS_READ_DELAYED and calls a callback when finished).
*/
#if !defined LWIP_HTTPD_FS_ASYNC_READ || defined __DOXYGEN__
#define LWIP_HTTPD_FS_ASYNC_READ 0
#endif
/** Filename (including path) to use as FS data file */
#if !defined HTTPD_FSDATA_FILE || defined __DOXYGEN__
/* HTTPD_USE_CUSTOM_FSDATA: Compatibility with deprecated lwIP option */
#if defined(HTTPD_USE_CUSTOM_FSDATA) && (HTTPD_USE_CUSTOM_FSDATA != 0)
#define HTTPD_FSDATA_FILE "fsdata_custom.c"
#else
#define HTTPD_FSDATA_FILE "fsdata.c"
#endif
#endif
/**
* @}
*/
#endif /* LWIP_HDR_APPS_HTTPD_OPTS_H */

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/**
* @file
* lwIP iPerf server implementation
*/
/*
* Copyright (c) 2014 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt
*
*/
#ifndef LWIP_HDR_APPS_LWIPERF_H
#define LWIP_HDR_APPS_LWIPERF_H
#include "lwip/opt.h"
#include "lwip/ip_addr.h"
#ifdef __cplusplus
extern "C" {
#endif
#define LWIPERF_TCP_PORT_DEFAULT 5001
/** lwIPerf test results */
enum lwiperf_report_type
{
/** The server side test is done */
LWIPERF_TCP_DONE_SERVER,
/** The client side test is done */
LWIPERF_TCP_DONE_CLIENT,
/** Local error lead to test abort */
LWIPERF_TCP_ABORTED_LOCAL,
/** Data check error lead to test abort */
LWIPERF_TCP_ABORTED_LOCAL_DATAERROR,
/** Transmit error lead to test abort */
LWIPERF_TCP_ABORTED_LOCAL_TXERROR,
/** Remote side aborted the test */
LWIPERF_TCP_ABORTED_REMOTE
};
/** Control */
enum lwiperf_client_type
{
/** Unidirectional tx only test */
LWIPERF_CLIENT,
/** Do a bidirectional test simultaneously */
LWIPERF_DUAL,
/** Do a bidirectional test individually */
LWIPERF_TRADEOFF
};
/** Prototype of a report function that is called when a session is finished.
This report function can show the test results.
@param report_type contains the test result */
typedef void (*lwiperf_report_fn)(void *arg, enum lwiperf_report_type report_type,
const ip_addr_t* local_addr, u16_t local_port, const ip_addr_t* remote_addr, u16_t remote_port,
u32_t bytes_transferred, u32_t ms_duration, u32_t bandwidth_kbitpsec);
void* lwiperf_start_tcp_server(const ip_addr_t* local_addr, u16_t local_port,
lwiperf_report_fn report_fn, void* report_arg);
void* lwiperf_start_tcp_server_default(lwiperf_report_fn report_fn, void* report_arg);
void* lwiperf_start_tcp_client(const ip_addr_t* remote_addr, u16_t remote_port,
enum lwiperf_client_type type,
lwiperf_report_fn report_fn, void* report_arg);
void* lwiperf_start_tcp_client_default(const ip_addr_t* remote_addr,
lwiperf_report_fn report_fn, void* report_arg);
void lwiperf_abort(void* lwiperf_session);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_LWIPERF_H */

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/**
* @file
* MDNS responder
*/
/*
* Copyright (c) 2015 Verisure Innovation AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Erik Ekman <erik@kryo.se>
*
*/
#ifndef LWIP_HDR_APPS_MDNS_H
#define LWIP_HDR_APPS_MDNS_H
#include "lwip/apps/mdns_opts.h"
#include "lwip/netif.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_MDNS_RESPONDER
enum mdns_sd_proto {
DNSSD_PROTO_UDP = 0,
DNSSD_PROTO_TCP = 1
};
#define MDNS_PROBING_CONFLICT 0
#define MDNS_PROBING_SUCCESSFUL 1
#define MDNS_LABEL_MAXLEN 63
struct mdns_host;
struct mdns_service;
/** Callback function to add text to a reply, called when generating the reply */
typedef void (*service_get_txt_fn_t)(struct mdns_service *service, void *txt_userdata);
/** Callback function to let application know the result of probing network for name
* uniqueness, called with result MDNS_PROBING_SUCCESSFUL if no other node claimed
* use for the name for the netif or a service and is safe to use, or MDNS_PROBING_CONFLICT
* if another node is already using it and mdns is disabled on this interface */
typedef void (*mdns_name_result_cb_t)(struct netif* netif, u8_t result);
void mdns_resp_init(void);
void mdns_resp_register_name_result_cb(mdns_name_result_cb_t cb);
err_t mdns_resp_add_netif(struct netif *netif, const char *hostname, u32_t dns_ttl);
err_t mdns_resp_remove_netif(struct netif *netif);
err_t mdns_resp_rename_netif(struct netif *netif, const char *hostname);
s8_t mdns_resp_add_service(struct netif *netif, const char *name, const char *service, enum mdns_sd_proto proto, u16_t port, u32_t dns_ttl, service_get_txt_fn_t txt_fn, void *txt_userdata);
err_t mdns_resp_del_service(struct netif *netif, s8_t slot);
err_t mdns_resp_rename_service(struct netif *netif, s8_t slot, const char *name);
err_t mdns_resp_add_service_txtitem(struct mdns_service *service, const char *txt, u8_t txt_len);
void mdns_resp_restart(struct netif *netif);
void mdns_resp_announce(struct netif *netif);
/**
* @ingroup mdns
* Announce IP settings have changed on netif.
* Call this in your callback registered by netif_set_status_callback().
* No need to call this function when LWIP_NETIF_EXT_STATUS_CALLBACK==1,
* this handled automatically for you.
* @param netif The network interface where settings have changed.
*/
#define mdns_resp_netif_settings_changed(netif) mdns_resp_announce(netif)
#endif /* LWIP_MDNS_RESPONDER */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_MDNS_H */

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/**
* @file
* MDNS responder
*/
/*
* Copyright (c) 2015 Verisure Innovation AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Erik Ekman <erik@kryo.se>
*
*/
#ifndef LWIP_HDR_APPS_MDNS_OPTS_H
#define LWIP_HDR_APPS_MDNS_OPTS_H
#include "lwip/opt.h"
/**
* @defgroup mdns_opts Options
* @ingroup mdns
* @{
*/
/**
* LWIP_MDNS_RESPONDER==1: Turn on multicast DNS module. UDP must be available for MDNS
* transport. IGMP is needed for IPv4 multicast.
*/
#ifndef LWIP_MDNS_RESPONDER
#define LWIP_MDNS_RESPONDER 0
#endif /* LWIP_MDNS_RESPONDER */
/** The maximum number of services per netif */
#ifndef MDNS_MAX_SERVICES
#define MDNS_MAX_SERVICES 1
#endif
/** MDNS_RESP_USENETIF_EXTCALLBACK==1: register an ext_callback on the netif
* to automatically restart probing/announcing on status or address change.
*/
#ifndef MDNS_RESP_USENETIF_EXTCALLBACK
#define MDNS_RESP_USENETIF_EXTCALLBACK LWIP_NETIF_EXT_STATUS_CALLBACK
#endif
/**
* MDNS_DEBUG: Enable debugging for multicast DNS.
*/
#ifndef MDNS_DEBUG
#define MDNS_DEBUG LWIP_DBG_OFF
#endif
/**
* @}
*/
#endif /* LWIP_HDR_APPS_MDNS_OPTS_H */

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/**
* @file
* MDNS responder private definitions
*/
/*
* Copyright (c) 2015 Verisure Innovation AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Erik Ekman <erik@kryo.se>
*
*/
#ifndef LWIP_HDR_MDNS_PRIV_H
#define LWIP_HDR_MDNS_PRIV_H
#include "lwip/apps/mdns_opts.h"
#include "lwip/pbuf.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_MDNS_RESPONDER
/* Domain struct and methods - visible for unit tests */
#define MDNS_DOMAIN_MAXLEN 256
#define MDNS_READNAME_ERROR 0xFFFF
struct mdns_domain {
/* Encoded domain name */
u8_t name[MDNS_DOMAIN_MAXLEN];
/* Total length of domain name, including zero */
u16_t length;
/* Set if compression of this domain is not allowed */
u8_t skip_compression;
};
err_t mdns_domain_add_label(struct mdns_domain *domain, const char *label, u8_t len);
u16_t mdns_readname(struct pbuf *p, u16_t offset, struct mdns_domain *domain);
int mdns_domain_eq(struct mdns_domain *a, struct mdns_domain *b);
u16_t mdns_compress_domain(struct pbuf *pbuf, u16_t *offset, struct mdns_domain *domain);
#endif /* LWIP_MDNS_RESPONDER */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_MDNS_PRIV_H */

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/**
* @file
* MQTT client
*/
/*
* Copyright (c) 2016 Erik Andersson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Erik Andersson
*
*/
#ifndef LWIP_HDR_APPS_MQTT_CLIENT_H
#define LWIP_HDR_APPS_MQTT_CLIENT_H
#include "lwip/apps/mqtt_opts.h"
#include "lwip/err.h"
#include "lwip/ip_addr.h"
#include "lwip/prot/iana.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct mqtt_client_s mqtt_client_t;
#if LWIP_ALTCP && LWIP_ALTCP_TLS
struct altcp_tls_config;
#endif
/** @ingroup mqtt
* Default MQTT port (non-TLS) */
#define MQTT_PORT LWIP_IANA_PORT_MQTT
/** @ingroup mqtt
* Default MQTT TLS port */
#define MQTT_TLS_PORT LWIP_IANA_PORT_SECURE_MQTT
/*---------------------------------------------------------------------------------------------- */
/* Connection with server */
/**
* @ingroup mqtt
* Client information and connection parameters */
struct mqtt_connect_client_info_t {
/** Client identifier, must be set by caller */
const char *client_id;
/** User name, set to NULL if not used */
const char* client_user;
/** Password, set to NULL if not used */
const char* client_pass;
/** keep alive time in seconds, 0 to disable keep alive functionality*/
u16_t keep_alive;
/** will topic, set to NULL if will is not to be used,
will_msg, will_qos and will retain are then ignored */
const char* will_topic;
/** will_msg, see will_topic */
const char* will_msg;
/** will_qos, see will_topic */
u8_t will_qos;
/** will_retain, see will_topic */
u8_t will_retain;
#if LWIP_ALTCP && LWIP_ALTCP_TLS
/** TLS configuration for secure connections */
struct altcp_tls_config *tls_config;
#endif
};
/**
* @ingroup mqtt
* Connection status codes */
typedef enum
{
/** Accepted */
MQTT_CONNECT_ACCEPTED = 0,
/** Refused protocol version */
MQTT_CONNECT_REFUSED_PROTOCOL_VERSION = 1,
/** Refused identifier */
MQTT_CONNECT_REFUSED_IDENTIFIER = 2,
/** Refused server */
MQTT_CONNECT_REFUSED_SERVER = 3,
/** Refused user credentials */
MQTT_CONNECT_REFUSED_USERNAME_PASS = 4,
/** Refused not authorized */
MQTT_CONNECT_REFUSED_NOT_AUTHORIZED_ = 5,
/** Disconnected */
MQTT_CONNECT_DISCONNECTED = 256,
/** Timeout */
MQTT_CONNECT_TIMEOUT = 257
} mqtt_connection_status_t;
/**
* @ingroup mqtt
* Function prototype for mqtt connection status callback. Called when
* client has connected to the server after initiating a mqtt connection attempt by
* calling mqtt_client_connect() or when connection is closed by server or an error
*
* @param client MQTT client itself
* @param arg Additional argument to pass to the callback function
* @param status Connect result code or disconnection notification @see mqtt_connection_status_t
*
*/
typedef void (*mqtt_connection_cb_t)(mqtt_client_t *client, void *arg, mqtt_connection_status_t status);
/**
* @ingroup mqtt
* Data callback flags */
enum {
/** Flag set when last fragment of data arrives in data callback */
MQTT_DATA_FLAG_LAST = 1
};
/**
* @ingroup mqtt
* Function prototype for MQTT incoming publish data callback function. Called when data
* arrives to a subscribed topic @see mqtt_subscribe
*
* @param arg Additional argument to pass to the callback function
* @param data User data, pointed object, data may not be referenced after callback return,
NULL is passed when all publish data are delivered
* @param len Length of publish data fragment
* @param flags MQTT_DATA_FLAG_LAST set when this call contains the last part of data from publish message
*
*/
typedef void (*mqtt_incoming_data_cb_t)(void *arg, const u8_t *data, u16_t len, u8_t flags);
/**
* @ingroup mqtt
* Function prototype for MQTT incoming publish function. Called when an incoming publish
* arrives to a subscribed topic @see mqtt_subscribe
*
* @param arg Additional argument to pass to the callback function
* @param topic Zero terminated Topic text string, topic may not be referenced after callback return
* @param tot_len Total length of publish data, if set to 0 (no publish payload) data callback will not be invoked
*/
typedef void (*mqtt_incoming_publish_cb_t)(void *arg, const char *topic, u32_t tot_len);
/**
* @ingroup mqtt
* Function prototype for mqtt request callback. Called when a subscribe, unsubscribe
* or publish request has completed
* @param arg Pointer to user data supplied when invoking request
* @param err ERR_OK on success
* ERR_TIMEOUT if no response was received within timeout,
* ERR_ABRT if (un)subscribe was denied
*/
typedef void (*mqtt_request_cb_t)(void *arg, err_t err);
err_t mqtt_client_connect(mqtt_client_t *client, const ip_addr_t *ipaddr, u16_t port, mqtt_connection_cb_t cb, void *arg,
const struct mqtt_connect_client_info_t *client_info);
void mqtt_disconnect(mqtt_client_t *client);
mqtt_client_t *mqtt_client_new(void);
void mqtt_client_free(mqtt_client_t* client);
u8_t mqtt_client_is_connected(mqtt_client_t *client);
void mqtt_set_inpub_callback(mqtt_client_t *client, mqtt_incoming_publish_cb_t,
mqtt_incoming_data_cb_t data_cb, void *arg);
err_t mqtt_sub_unsub(mqtt_client_t *client, const char *topic, u8_t qos, mqtt_request_cb_t cb, void *arg, u8_t sub);
/** @ingroup mqtt
*Subscribe to topic */
#define mqtt_subscribe(client, topic, qos, cb, arg) mqtt_sub_unsub(client, topic, qos, cb, arg, 1)
/** @ingroup mqtt
* Unsubscribe to topic */
#define mqtt_unsubscribe(client, topic, cb, arg) mqtt_sub_unsub(client, topic, 0, cb, arg, 0)
err_t mqtt_publish(mqtt_client_t *client, const char *topic, const void *payload, u16_t payload_length, u8_t qos, u8_t retain,
mqtt_request_cb_t cb, void *arg);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_MQTT_CLIENT_H */

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/**
* @file
* MQTT client options
*/
/*
* Copyright (c) 2016 Erik Andersson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Erik Andersson
*
*/
#ifndef LWIP_HDR_APPS_MQTT_OPTS_H
#define LWIP_HDR_APPS_MQTT_OPTS_H
#include "lwip/opt.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup mqtt_opts Options
* @ingroup mqtt
* @{
*/
/**
* Output ring-buffer size, must be able to fit largest outgoing publish message topic+payloads
*/
#ifndef MQTT_OUTPUT_RINGBUF_SIZE
#define MQTT_OUTPUT_RINGBUF_SIZE 256
#endif
/**
* Number of bytes in receive buffer, must be at least the size of the longest incoming topic + 8
* If one wants to avoid fragmented incoming publish, set length to max incoming topic length + max payload length + 8
*/
#ifndef MQTT_VAR_HEADER_BUFFER_LEN
#define MQTT_VAR_HEADER_BUFFER_LEN 128
#endif
/**
* Maximum number of pending subscribe, unsubscribe and publish requests to server .
*/
#ifndef MQTT_REQ_MAX_IN_FLIGHT
#define MQTT_REQ_MAX_IN_FLIGHT 4
#endif
/**
* Seconds between each cyclic timer call.
*/
#ifndef MQTT_CYCLIC_TIMER_INTERVAL
#define MQTT_CYCLIC_TIMER_INTERVAL 5
#endif
/**
* Publish, subscribe and unsubscribe request timeout in seconds.
*/
#ifndef MQTT_REQ_TIMEOUT
#define MQTT_REQ_TIMEOUT 30
#endif
/**
* Seconds for MQTT connect response timeout after sending connect request
*/
#ifndef MQTT_CONNECT_TIMOUT
#define MQTT_CONNECT_TIMOUT 100
#endif
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_MQTT_OPTS_H */

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/**
* @file
* MQTT client (private interface)
*/
/*
* Copyright (c) 2016 Erik Andersson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Erik Andersson
*
*/
#ifndef LWIP_HDR_APPS_MQTT_PRIV_H
#define LWIP_HDR_APPS_MQTT_PRIV_H
#include "lwip/apps/mqtt.h"
#include "lwip/altcp.h"
#ifdef __cplusplus
extern "C" {
#endif
/** Pending request item, binds application callback to pending server requests */
struct mqtt_request_t
{
/** Next item in list, NULL means this is the last in chain,
next pointing at itself means request is unallocated */
struct mqtt_request_t *next;
/** Callback to upper layer */
mqtt_request_cb_t cb;
void *arg;
/** MQTT packet identifier */
u16_t pkt_id;
/** Expire time relative to element before this */
u16_t timeout_diff;
};
/** Ring buffer */
struct mqtt_ringbuf_t {
u16_t put;
u16_t get;
u8_t buf[MQTT_OUTPUT_RINGBUF_SIZE];
};
/** MQTT client */
struct mqtt_client_s
{
/** Timers and timeouts */
u16_t cyclic_tick;
u16_t keep_alive;
u16_t server_watchdog;
/** Packet identifier generator*/
u16_t pkt_id_seq;
/** Packet identifier of pending incoming publish */
u16_t inpub_pkt_id;
/** Connection state */
u8_t conn_state;
struct altcp_pcb *conn;
/** Connection callback */
void *connect_arg;
mqtt_connection_cb_t connect_cb;
/** Pending requests to server */
struct mqtt_request_t *pend_req_queue;
struct mqtt_request_t req_list[MQTT_REQ_MAX_IN_FLIGHT];
void *inpub_arg;
/** Incoming data callback */
mqtt_incoming_data_cb_t data_cb;
mqtt_incoming_publish_cb_t pub_cb;
/** Input */
u32_t msg_idx;
u8_t rx_buffer[MQTT_VAR_HEADER_BUFFER_LEN];
/** Output ring-buffer */
struct mqtt_ringbuf_t output;
};
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_MQTT_PRIV_H */

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/**
* @file
* NETBIOS name service responder
*/
/*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
*/
#ifndef LWIP_HDR_APPS_NETBIOS_H
#define LWIP_HDR_APPS_NETBIOS_H
#include "lwip/apps/netbiosns_opts.h"
#ifdef __cplusplus
extern "C" {
#endif
void netbiosns_init(void);
#ifndef NETBIOS_LWIP_NAME
void netbiosns_set_name(const char* hostname);
#endif
void netbiosns_stop(void);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_NETBIOS_H */

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/**
* @file
* NETBIOS name service responder options
*/
/*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
*/
#ifndef LWIP_HDR_APPS_NETBIOS_OPTS_H
#define LWIP_HDR_APPS_NETBIOS_OPTS_H
#include "lwip/opt.h"
/**
* @defgroup netbiosns_opts Options
* @ingroup netbiosns
* @{
*/
/** NetBIOS name of lwip device
* This must be uppercase until NETBIOS_STRCMP() is defined to a string
* comparision function that is case insensitive.
* If you want to use the netif's hostname, use this (with LWIP_NETIF_HOSTNAME):
* (ip_current_netif() != NULL ? ip_current_netif()->hostname != NULL ? ip_current_netif()->hostname : "" : "")
*
* If this is not defined, netbiosns_set_name() can be called at runtime to change the name.
*/
#ifdef __DOXYGEN__
#define NETBIOS_LWIP_NAME "NETBIOSLWIPDEV"
#endif
/** Respond to NetBIOS name queries
* Default is disabled
*/
#if !defined LWIP_NETBIOS_RESPOND_NAME_QUERY || defined __DOXYGEN__
#define LWIP_NETBIOS_RESPOND_NAME_QUERY 0
#endif
/**
* @}
*/
#endif /* LWIP_HDR_APPS_NETBIOS_OPTS_H */

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#ifndef LWIP_HDR_APPS_SMTP_H
#define LWIP_HDR_APPS_SMTP_H
#ifdef __cplusplus
extern "C" {
#endif
#include "lwip/apps/smtp_opts.h"
#include "lwip/err.h"
#include "lwip/prot/iana.h"
/** The default TCP port used for SMTP */
#define SMTP_DEFAULT_PORT LWIP_IANA_PORT_SMTP
/** The default TCP port used for SMTPS */
#define SMTPS_DEFAULT_PORT LWIP_IANA_PORT_SMTPS
/** Email successfully sent */
#define SMTP_RESULT_OK 0
/** Unknown error */
#define SMTP_RESULT_ERR_UNKNOWN 1
/** Connection to server failed */
#define SMTP_RESULT_ERR_CONNECT 2
/** Failed to resolve server hostname */
#define SMTP_RESULT_ERR_HOSTNAME 3
/** Connection unexpectedly closed by remote server */
#define SMTP_RESULT_ERR_CLOSED 4
/** Connection timed out (server didn't respond in time) */
#define SMTP_RESULT_ERR_TIMEOUT 5
/** Server responded with an unknown response code */
#define SMTP_RESULT_ERR_SVR_RESP 6
/** Out of resources locally */
#define SMTP_RESULT_ERR_MEM 7
/** Prototype of an smtp callback function
*
* @param arg argument specified when initiating the email
* @param smtp_result result of the mail transfer (see defines SMTP_RESULT_*)
* @param srv_err if aborted by the server, this contains the error code received
* @param err an error returned by internal lwip functions, can help to specify
* the source of the error but must not necessarily be != ERR_OK
*/
typedef void (*smtp_result_fn)(void *arg, u8_t smtp_result, u16_t srv_err, err_t err);
/** This structure is used as argument for smtp_send_mail_int(),
* which in turn can be used with tcpip_callback() to send mail
* from interrupt context, e.g. like this:
* struct smtp_send_request *req; (to be filled)
* tcpip_try_callback(smtp_send_mail_int, (void*)req);
*
* For member description, see parameter description of smtp_send_mail().
* When using with tcpip_callback, this structure has to stay allocated
* (e.g. using mem_malloc/mem_free) until its 'callback_fn' is called.
*/
struct smtp_send_request {
const char *from;
const char* to;
const char* subject;
const char* body;
smtp_result_fn callback_fn;
void* callback_arg;
/** If this is != 0, data is *not* copied into an extra buffer
* but used from the pointers supplied in this struct.
* This means less memory usage, but data must stay untouched until
* the callback function is called. */
u8_t static_data;
};
#if SMTP_BODYDH
#ifndef SMTP_BODYDH_BUFFER_SIZE
#define SMTP_BODYDH_BUFFER_SIZE 256
#endif /* SMTP_BODYDH_BUFFER_SIZE */
struct smtp_bodydh {
u16_t state;
u16_t length; /* Length of content in buffer */
char buffer[SMTP_BODYDH_BUFFER_SIZE]; /* buffer for generated content */
#ifdef SMTP_BODYDH_USER_SIZE
u8_t user[SMTP_BODYDH_USER_SIZE];
#endif /* SMTP_BODYDH_USER_SIZE */
};
enum bdh_retvals_e {
BDH_DONE = 0,
BDH_WORKING
};
/** Prototype of an smtp body callback function
* It receives a struct smtp_bodydh, and a buffer to write data,
* must return BDH_WORKING to be called again and BDH_DONE when
* it has finished processing. This one tries to fill one TCP buffer with
* data, your function will be repeatedly called until that happens; so if you
* know you'll be taking too long to serve your request, pause once in a while
* by writing length=0 to avoid hogging system resources
*
* @param arg argument specified when initiating the email
* @param smtp_bodydh state handling + buffer structure
*/
typedef int (*smtp_bodycback_fn)(void *arg, struct smtp_bodydh *bodydh);
err_t smtp_send_mail_bodycback(const char *from, const char* to, const char* subject,
smtp_bodycback_fn bodycback_fn, smtp_result_fn callback_fn, void* callback_arg);
#endif /* SMTP_BODYDH */
err_t smtp_set_server_addr(const char* server);
void smtp_set_server_port(u16_t port);
#if LWIP_ALTCP && LWIP_ALTCP_TLS
struct altcp_tls_config;
void smtp_set_tls_config(struct altcp_tls_config *tls_config);
#endif
err_t smtp_set_auth(const char* username, const char* pass);
err_t smtp_send_mail(const char *from, const char* to, const char* subject, const char* body,
smtp_result_fn callback_fn, void* callback_arg);
err_t smtp_send_mail_static(const char *from, const char* to, const char* subject, const char* body,
smtp_result_fn callback_fn, void* callback_arg);
void smtp_send_mail_int(void *arg);
#ifdef LWIP_DEBUG
const char* smtp_result_str(u8_t smtp_result);
#endif
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_SMTP_H */

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#ifndef LWIP_HDR_APPS_SMTP_OPTS_H
#define LWIP_HDR_APPS_SMTP_OPTS_H
#include "lwip/opt.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup smtp_opts Options
* @ingroup smtp
*
* @{
*/
/** Set this to 1 to enable data handler callback on BODY */
#ifndef SMTP_BODYDH
#define SMTP_BODYDH 0
#endif
/** SMTP_DEBUG: Enable debugging for SNTP. */
#ifndef SMTP_DEBUG
#define SMTP_DEBUG LWIP_DBG_OFF
#endif
/** Maximum length reserved for server name including terminating 0 byte */
#ifndef SMTP_MAX_SERVERNAME_LEN
#define SMTP_MAX_SERVERNAME_LEN 256
#endif
/** Maximum length reserved for username */
#ifndef SMTP_MAX_USERNAME_LEN
#define SMTP_MAX_USERNAME_LEN 32
#endif
/** Maximum length reserved for password */
#ifndef SMTP_MAX_PASS_LEN
#define SMTP_MAX_PASS_LEN 32
#endif
/** Set this to 0 if you know the authentication data will not change
* during the smtp session, which saves some heap space. */
#ifndef SMTP_COPY_AUTHDATA
#define SMTP_COPY_AUTHDATA 1
#endif
/** Set this to 0 to save some code space if you know for sure that all data
* passed to this module conforms to the requirements in the SMTP RFC.
* WARNING: use this with care!
*/
#ifndef SMTP_CHECK_DATA
#define SMTP_CHECK_DATA 1
#endif
/** Set this to 1 to enable AUTH PLAIN support */
#ifndef SMTP_SUPPORT_AUTH_PLAIN
#define SMTP_SUPPORT_AUTH_PLAIN 1
#endif
/** Set this to 1 to enable AUTH LOGIN support */
#ifndef SMTP_SUPPORT_AUTH_LOGIN
#define SMTP_SUPPORT_AUTH_LOGIN 1
#endif
/* Memory allocation/deallocation can be overridden... */
#ifndef SMTP_STATE_MALLOC
#define SMTP_STATE_MALLOC(size) mem_malloc(size)
#define SMTP_STATE_FREE(ptr) mem_free(ptr)
#endif
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* SMTP_OPTS_H */

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/**
* @file
* SNMP server main API - start and basic configuration
*/
/*
* Copyright (c) 2001, 2002 Leon Woestenberg <leon.woestenberg@axon.tv>
* Copyright (c) 2001, 2002 Axon Digital Design B.V., The Netherlands.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Leon Woestenberg <leon.woestenberg@axon.tv>
* Martin Hentschel <info@cl-soft.de>
*
*/
#ifndef LWIP_HDR_APPS_SNMP_H
#define LWIP_HDR_APPS_SNMP_H
#include "lwip/apps/snmp_opts.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
#include "lwip/err.h"
#include "lwip/apps/snmp_core.h"
/** SNMP variable binding descriptor (publically needed for traps) */
struct snmp_varbind
{
/** pointer to next varbind, NULL for last in list */
struct snmp_varbind *next;
/** pointer to previous varbind, NULL for first in list */
struct snmp_varbind *prev;
/** object identifier */
struct snmp_obj_id oid;
/** value ASN1 type */
u8_t type;
/** object value length */
u16_t value_len;
/** object value */
void *value;
};
/**
* @ingroup snmp_core
* Agent setup, start listening to port 161.
*/
void snmp_init(void);
void snmp_set_mibs(const struct snmp_mib **mibs, u8_t num_mibs);
void snmp_set_device_enterprise_oid(const struct snmp_obj_id* device_enterprise_oid);
const struct snmp_obj_id* snmp_get_device_enterprise_oid(void);
void snmp_trap_dst_enable(u8_t dst_idx, u8_t enable);
void snmp_trap_dst_ip_set(u8_t dst_idx, const ip_addr_t *dst);
/** Generic trap: cold start */
#define SNMP_GENTRAP_COLDSTART 0
/** Generic trap: warm start */
#define SNMP_GENTRAP_WARMSTART 1
/** Generic trap: link down */
#define SNMP_GENTRAP_LINKDOWN 2
/** Generic trap: link up */
#define SNMP_GENTRAP_LINKUP 3
/** Generic trap: authentication failure */
#define SNMP_GENTRAP_AUTH_FAILURE 4
/** Generic trap: EGP neighbor lost */
#define SNMP_GENTRAP_EGP_NEIGHBOR_LOSS 5
/** Generic trap: enterprise specific */
#define SNMP_GENTRAP_ENTERPRISE_SPECIFIC 6
err_t snmp_send_trap_generic(s32_t generic_trap);
err_t snmp_send_trap_specific(s32_t specific_trap, struct snmp_varbind *varbinds);
err_t snmp_send_trap(const struct snmp_obj_id* oid, s32_t generic_trap, s32_t specific_trap, struct snmp_varbind *varbinds);
#define SNMP_AUTH_TRAPS_DISABLED 0
#define SNMP_AUTH_TRAPS_ENABLED 1
void snmp_set_auth_traps_enabled(u8_t enable);
u8_t snmp_get_auth_traps_enabled(void);
u8_t snmp_v1_enabled(void);
u8_t snmp_v2c_enabled(void);
u8_t snmp_v3_enabled(void);
void snmp_v1_enable(u8_t enable);
void snmp_v2c_enable(u8_t enable);
void snmp_v3_enable(u8_t enable);
const char * snmp_get_community(void);
const char * snmp_get_community_write(void);
const char * snmp_get_community_trap(void);
void snmp_set_community(const char * const community);
void snmp_set_community_write(const char * const community);
void snmp_set_community_trap(const char * const community);
void snmp_coldstart_trap(void);
void snmp_authfail_trap(void);
typedef void (*snmp_write_callback_fct)(const u32_t* oid, u8_t oid_len, void* callback_arg);
void snmp_set_write_callback(snmp_write_callback_fct write_callback, void* callback_arg);
#endif /* LWIP_SNMP */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_SNMP_H */

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/**
* @file
* SNMP core API for implementing MIBs
*/
/*
* Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Christiaan Simons <christiaan.simons@axon.tv>
* Martin Hentschel <info@cl-soft.de>
*/
#ifndef LWIP_HDR_APPS_SNMP_CORE_H
#define LWIP_HDR_APPS_SNMP_CORE_H
#include "lwip/apps/snmp_opts.h"
#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
#include "lwip/ip_addr.h"
#include "lwip/err.h"
#ifdef __cplusplus
extern "C" {
#endif
/* basic ASN1 defines */
#define SNMP_ASN1_CLASS_UNIVERSAL 0x00
#define SNMP_ASN1_CLASS_APPLICATION 0x40
#define SNMP_ASN1_CLASS_CONTEXT 0x80
#define SNMP_ASN1_CLASS_PRIVATE 0xC0
#define SNMP_ASN1_CONTENTTYPE_PRIMITIVE 0x00
#define SNMP_ASN1_CONTENTTYPE_CONSTRUCTED 0x20
/* universal tags (from ASN.1 spec.) */
#define SNMP_ASN1_UNIVERSAL_END_OF_CONTENT 0
#define SNMP_ASN1_UNIVERSAL_INTEGER 2
#define SNMP_ASN1_UNIVERSAL_OCTET_STRING 4
#define SNMP_ASN1_UNIVERSAL_NULL 5
#define SNMP_ASN1_UNIVERSAL_OBJECT_ID 6
#define SNMP_ASN1_UNIVERSAL_SEQUENCE_OF 16
/* application specific (SNMP) tags (from SNMPv2-SMI) */
#define SNMP_ASN1_APPLICATION_IPADDR 0 /* [APPLICATION 0] IMPLICIT OCTET STRING (SIZE (4)) */
#define SNMP_ASN1_APPLICATION_COUNTER 1 /* [APPLICATION 1] IMPLICIT INTEGER (0..4294967295) => u32_t */
#define SNMP_ASN1_APPLICATION_GAUGE 2 /* [APPLICATION 2] IMPLICIT INTEGER (0..4294967295) => u32_t */
#define SNMP_ASN1_APPLICATION_TIMETICKS 3 /* [APPLICATION 3] IMPLICIT INTEGER (0..4294967295) => u32_t */
#define SNMP_ASN1_APPLICATION_OPAQUE 4 /* [APPLICATION 4] IMPLICIT OCTET STRING */
#define SNMP_ASN1_APPLICATION_COUNTER64 6 /* [APPLICATION 6] IMPLICIT INTEGER (0..18446744073709551615) */
/* context specific (SNMP) tags (from RFC 1905) */
#define SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_INSTANCE 1
/* full ASN1 type defines */
#define SNMP_ASN1_TYPE_END_OF_CONTENT (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_END_OF_CONTENT)
#define SNMP_ASN1_TYPE_INTEGER (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_INTEGER)
#define SNMP_ASN1_TYPE_OCTET_STRING (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_OCTET_STRING)
#define SNMP_ASN1_TYPE_NULL (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_NULL)
#define SNMP_ASN1_TYPE_OBJECT_ID (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_OBJECT_ID)
#define SNMP_ASN1_TYPE_SEQUENCE (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_UNIVERSAL_SEQUENCE_OF)
#define SNMP_ASN1_TYPE_IPADDR (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_IPADDR)
#define SNMP_ASN1_TYPE_IPADDRESS SNMP_ASN1_TYPE_IPADDR
#define SNMP_ASN1_TYPE_COUNTER (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_COUNTER)
#define SNMP_ASN1_TYPE_COUNTER32 SNMP_ASN1_TYPE_COUNTER
#define SNMP_ASN1_TYPE_GAUGE (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_GAUGE)
#define SNMP_ASN1_TYPE_GAUGE32 SNMP_ASN1_TYPE_GAUGE
#define SNMP_ASN1_TYPE_UNSIGNED32 SNMP_ASN1_TYPE_GAUGE
#define SNMP_ASN1_TYPE_TIMETICKS (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_TIMETICKS)
#define SNMP_ASN1_TYPE_OPAQUE (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_OPAQUE)
#if LWIP_HAVE_INT64
#define SNMP_ASN1_TYPE_COUNTER64 (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_COUNTER64)
#endif
#define SNMP_VARBIND_EXCEPTION_OFFSET 0xF0
#define SNMP_VARBIND_EXCEPTION_MASK 0x0F
/** error codes predefined by SNMP prot. */
typedef enum {
SNMP_ERR_NOERROR = 0,
/*
outdated v1 error codes. do not use anmore!
#define SNMP_ERR_NOSUCHNAME 2 use SNMP_ERR_NOSUCHINSTANCE instead
#define SNMP_ERR_BADVALUE 3 use SNMP_ERR_WRONGTYPE,SNMP_ERR_WRONGLENGTH,SNMP_ERR_WRONGENCODING or SNMP_ERR_WRONGVALUE instead
#define SNMP_ERR_READONLY 4 use SNMP_ERR_NOTWRITABLE instead
*/
SNMP_ERR_GENERROR = 5,
SNMP_ERR_NOACCESS = 6,
SNMP_ERR_WRONGTYPE = 7,
SNMP_ERR_WRONGLENGTH = 8,
SNMP_ERR_WRONGENCODING = 9,
SNMP_ERR_WRONGVALUE = 10,
SNMP_ERR_NOCREATION = 11,
SNMP_ERR_INCONSISTENTVALUE = 12,
SNMP_ERR_RESOURCEUNAVAILABLE = 13,
SNMP_ERR_COMMITFAILED = 14,
SNMP_ERR_UNDOFAILED = 15,
SNMP_ERR_NOTWRITABLE = 17,
SNMP_ERR_INCONSISTENTNAME = 18,
SNMP_ERR_NOSUCHINSTANCE = SNMP_VARBIND_EXCEPTION_OFFSET + SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_INSTANCE
} snmp_err_t;
/** internal object identifier representation */
struct snmp_obj_id
{
u8_t len;
u32_t id[SNMP_MAX_OBJ_ID_LEN];
};
struct snmp_obj_id_const_ref
{
u8_t len;
const u32_t* id;
};
extern const struct snmp_obj_id_const_ref snmp_zero_dot_zero; /* administrative identifier from SNMPv2-SMI */
/** SNMP variant value, used as reference in struct snmp_node_instance and table implementation */
union snmp_variant_value
{
void* ptr;
const void* const_ptr;
u32_t u32;
s32_t s32;
#if LWIP_HAVE_INT64
u64_t u64;
#endif
};
/**
SNMP MIB node types
tree node is the only node the stack can process in order to walk the tree,
all other nodes are assumed to be leaf nodes.
This cannot be an enum because users may want to define their own node types.
*/
#define SNMP_NODE_TREE 0x00
/* predefined leaf node types */
#define SNMP_NODE_SCALAR 0x01
#define SNMP_NODE_SCALAR_ARRAY 0x02
#define SNMP_NODE_TABLE 0x03
#define SNMP_NODE_THREADSYNC 0x04
/** node "base class" layout, the mandatory fields for a node */
struct snmp_node
{
/** one out of SNMP_NODE_TREE or any leaf node type (like SNMP_NODE_SCALAR) */
u8_t node_type;
/** the number assigned to this node which used as part of the full OID */
u32_t oid;
};
/** SNMP node instance access types */
typedef enum {
SNMP_NODE_INSTANCE_ACCESS_READ = 1,
SNMP_NODE_INSTANCE_ACCESS_WRITE = 2,
SNMP_NODE_INSTANCE_READ_ONLY = SNMP_NODE_INSTANCE_ACCESS_READ,
SNMP_NODE_INSTANCE_READ_WRITE = (SNMP_NODE_INSTANCE_ACCESS_READ | SNMP_NODE_INSTANCE_ACCESS_WRITE),
SNMP_NODE_INSTANCE_WRITE_ONLY = SNMP_NODE_INSTANCE_ACCESS_WRITE,
SNMP_NODE_INSTANCE_NOT_ACCESSIBLE = 0
} snmp_access_t;
struct snmp_node_instance;
typedef s16_t (*node_instance_get_value_method)(struct snmp_node_instance*, void*);
typedef snmp_err_t (*node_instance_set_test_method)(struct snmp_node_instance*, u16_t, void*);
typedef snmp_err_t (*node_instance_set_value_method)(struct snmp_node_instance*, u16_t, void*);
typedef void (*node_instance_release_method)(struct snmp_node_instance*);
#define SNMP_GET_VALUE_RAW_DATA 0x4000 /* do not use 0x8000 because return value of node_instance_get_value_method is signed16 and 0x8000 would be the signed bit */
/** SNMP node instance */
struct snmp_node_instance
{
/** prefilled with the node, get_instance() is called on; may be changed by user to any value to pass an arbitrary node between calls to get_instance() and get_value/test_value/set_value */
const struct snmp_node* node;
/** prefilled with the instance id requested; for get_instance() this is the exact oid requested; for get_next_instance() this is the relative starting point, stack expects relative oid of next node here */
struct snmp_obj_id instance_oid;
/** ASN type for this object (see snmp_asn1.h for definitions) */
u8_t asn1_type;
/** one out of instance access types defined above (SNMP_NODE_INSTANCE_READ_ONLY,...) */
snmp_access_t access;
/** returns object value for the given object identifier. Return values <0 to indicate an error */
node_instance_get_value_method get_value;
/** tests length and/or range BEFORE setting */
node_instance_set_test_method set_test;
/** sets object value, only called when set_test() was successful */
node_instance_set_value_method set_value;
/** called in any case when the instance is not required anymore by stack (useful for freeing memory allocated in get_instance/get_next_instance methods) */
node_instance_release_method release_instance;
/** reference to pass arbitrary value between calls to get_instance() and get_value/test_value/set_value */
union snmp_variant_value reference;
/** see reference (if reference is a pointer, the length of underlying data may be stored here or anything else) */
u32_t reference_len;
};
/** SNMP tree node */
struct snmp_tree_node
{
/** inherited "base class" members */
struct snmp_node node;
u16_t subnode_count;
const struct snmp_node* const *subnodes;
};
#define SNMP_CREATE_TREE_NODE(oid, subnodes) \
{{ SNMP_NODE_TREE, (oid) }, \
(u16_t)LWIP_ARRAYSIZE(subnodes), (subnodes) }
#define SNMP_CREATE_EMPTY_TREE_NODE(oid) \
{{ SNMP_NODE_TREE, (oid) }, \
0, NULL }
/** SNMP leaf node */
struct snmp_leaf_node
{
/** inherited "base class" members */
struct snmp_node node;
snmp_err_t (*get_instance)(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
snmp_err_t (*get_next_instance)(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
};
/** represents a single mib with its base oid and root node */
struct snmp_mib
{
const u32_t *base_oid;
u8_t base_oid_len;
const struct snmp_node *root_node;
};
#define SNMP_MIB_CREATE(oid_list, root_node) { (oid_list), (u8_t)LWIP_ARRAYSIZE(oid_list), root_node }
/** OID range structure */
struct snmp_oid_range
{
u32_t min;
u32_t max;
};
/** checks if incoming OID length and values are in allowed ranges */
u8_t snmp_oid_in_range(const u32_t *oid_in, u8_t oid_len, const struct snmp_oid_range *oid_ranges, u8_t oid_ranges_len);
typedef enum {
SNMP_NEXT_OID_STATUS_SUCCESS,
SNMP_NEXT_OID_STATUS_NO_MATCH,
SNMP_NEXT_OID_STATUS_BUF_TO_SMALL
} snmp_next_oid_status_t;
/** state for next_oid_init / next_oid_check functions */
struct snmp_next_oid_state
{
const u32_t* start_oid;
u8_t start_oid_len;
u32_t* next_oid;
u8_t next_oid_len;
u8_t next_oid_max_len;
snmp_next_oid_status_t status;
void* reference;
};
void snmp_next_oid_init(struct snmp_next_oid_state *state,
const u32_t *start_oid, u8_t start_oid_len,
u32_t *next_oid_buf, u8_t next_oid_max_len);
u8_t snmp_next_oid_precheck(struct snmp_next_oid_state *state, const u32_t *oid, u8_t oid_len);
u8_t snmp_next_oid_check(struct snmp_next_oid_state *state, const u32_t *oid, u8_t oid_len, void* reference);
void snmp_oid_assign(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len);
void snmp_oid_combine(struct snmp_obj_id* target, const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len);
void snmp_oid_prefix(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len);
void snmp_oid_append(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len);
u8_t snmp_oid_equal(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len);
s8_t snmp_oid_compare(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len);
#if LWIP_IPV4
u8_t snmp_oid_to_ip4(const u32_t *oid, ip4_addr_t *ip);
void snmp_ip4_to_oid(const ip4_addr_t *ip, u32_t *oid);
#endif /* LWIP_IPV4 */
#if LWIP_IPV6
u8_t snmp_oid_to_ip6(const u32_t *oid, ip6_addr_t *ip);
void snmp_ip6_to_oid(const ip6_addr_t *ip, u32_t *oid);
#endif /* LWIP_IPV6 */
#if LWIP_IPV4 || LWIP_IPV6
u8_t snmp_ip_to_oid(const ip_addr_t *ip, u32_t *oid);
u8_t snmp_ip_port_to_oid(const ip_addr_t *ip, u16_t port, u32_t *oid);
u8_t snmp_oid_to_ip(const u32_t *oid, u8_t oid_len, ip_addr_t *ip);
u8_t snmp_oid_to_ip_port(const u32_t *oid, u8_t oid_len, ip_addr_t *ip, u16_t *port);
#endif /* LWIP_IPV4 || LWIP_IPV6 */
struct netif;
u8_t netif_to_num(const struct netif *netif);
snmp_err_t snmp_set_test_ok(struct snmp_node_instance* instance, u16_t value_len, void* value); /* generic function which can be used if test is always successful */
err_t snmp_decode_bits(const u8_t *buf, u32_t buf_len, u32_t *bit_value);
err_t snmp_decode_truthvalue(const s32_t *asn1_value, u8_t *bool_value);
u8_t snmp_encode_bits(u8_t *buf, u32_t buf_len, u32_t bit_value, u8_t bit_count);
u8_t snmp_encode_truthvalue(s32_t *asn1_value, u32_t bool_value);
struct snmp_statistics
{
u32_t inpkts;
u32_t outpkts;
u32_t inbadversions;
u32_t inbadcommunitynames;
u32_t inbadcommunityuses;
u32_t inasnparseerrs;
u32_t intoobigs;
u32_t innosuchnames;
u32_t inbadvalues;
u32_t inreadonlys;
u32_t ingenerrs;
u32_t intotalreqvars;
u32_t intotalsetvars;
u32_t ingetrequests;
u32_t ingetnexts;
u32_t insetrequests;
u32_t ingetresponses;
u32_t intraps;
u32_t outtoobigs;
u32_t outnosuchnames;
u32_t outbadvalues;
u32_t outgenerrs;
u32_t outgetrequests;
u32_t outgetnexts;
u32_t outsetrequests;
u32_t outgetresponses;
u32_t outtraps;
#if LWIP_SNMP_V3
u32_t unsupportedseclevels;
u32_t notintimewindows;
u32_t unknownusernames;
u32_t unknownengineids;
u32_t wrongdigests;
u32_t decryptionerrors;
#endif
};
extern struct snmp_statistics snmp_stats;
#ifdef __cplusplus
}
#endif
#endif /* LWIP_SNMP */
#endif /* LWIP_HDR_APPS_SNMP_CORE_H */

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/**
* @file
* SNMP MIB2 API
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Dirk Ziegelmeier <dziegel@gmx.de>
*
*/
#ifndef LWIP_HDR_APPS_SNMP_MIB2_H
#define LWIP_HDR_APPS_SNMP_MIB2_H
#include "lwip/apps/snmp_opts.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
#if SNMP_LWIP_MIB2
#include "lwip/apps/snmp_core.h"
extern const struct snmp_mib mib2;
#if SNMP_USE_NETCONN
#include "lwip/apps/snmp_threadsync.h"
void snmp_mib2_lwip_synchronizer(snmp_threadsync_called_fn fn, void* arg);
extern struct snmp_threadsync_instance snmp_mib2_lwip_locks;
#endif
#ifndef SNMP_SYSSERVICES
#define SNMP_SYSSERVICES ((1 << 6) | (1 << 3) | ((IP_FORWARD) << 2))
#endif
void snmp_mib2_set_sysdescr(const u8_t* str, const u16_t* len); /* read-only be defintion */
void snmp_mib2_set_syscontact(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize);
void snmp_mib2_set_syscontact_readonly(const u8_t *ocstr, const u16_t *ocstrlen);
void snmp_mib2_set_sysname(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize);
void snmp_mib2_set_sysname_readonly(const u8_t *ocstr, const u16_t *ocstrlen);
void snmp_mib2_set_syslocation(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize);
void snmp_mib2_set_syslocation_readonly(const u8_t *ocstr, const u16_t *ocstrlen);
#endif /* SNMP_LWIP_MIB2 */
#endif /* LWIP_SNMP */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_SNMP_MIB2_H */

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/**
* @file
* SNMP server options list
*/
/*
* Copyright (c) 2015 Dirk Ziegelmeier
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Dirk Ziegelmeier
*
*/
#ifndef LWIP_HDR_SNMP_OPTS_H
#define LWIP_HDR_SNMP_OPTS_H
#include "lwip/opt.h"
/**
* @defgroup snmp_opts Options
* @ingroup snmp
* @{
*/
/**
* LWIP_SNMP==1: This enables the lwIP SNMP agent. UDP must be available
* for SNMP transport.
* If you want to use your own SNMP agent, leave this disabled.
* To integrate MIB2 of an external agent, you need to enable
* LWIP_MIB2_CALLBACKS and MIB2_STATS. This will give you the callbacks
* and statistics counters you need to get MIB2 working.
*/
#if !defined LWIP_SNMP || defined __DOXYGEN__
#define LWIP_SNMP 1
#endif
/**
* SNMP_USE_NETCONN: Use netconn API instead of raw API.
* Makes SNMP agent run in a worker thread, so blocking operations
* can be done in MIB calls.
*/
#if !defined SNMP_USE_NETCONN || defined __DOXYGEN__
#define SNMP_USE_NETCONN 0
#endif
/**
* SNMP_USE_RAW: Use raw API.
* SNMP agent does not run in a worker thread, so blocking operations
* should not be done in MIB calls.
*/
#if !defined SNMP_USE_RAW || defined __DOXYGEN__
#define SNMP_USE_RAW 1
#endif
#if SNMP_USE_NETCONN && SNMP_USE_RAW
#error SNMP stack can use only one of the APIs {raw, netconn}
#endif
#if LWIP_SNMP && !SNMP_USE_NETCONN && !SNMP_USE_RAW
#error SNMP stack needs a receive API and UDP {raw, netconn}
#endif
#if SNMP_USE_NETCONN
/**
* SNMP_STACK_SIZE: Stack size of SNMP netconn worker thread
*/
#if !defined SNMP_STACK_SIZE || defined __DOXYGEN__
#define SNMP_STACK_SIZE DEFAULT_THREAD_STACKSIZE
#endif
/**
* SNMP_THREAD_PRIO: SNMP netconn worker thread priority
*/
#if !defined SNMP_THREAD_PRIO || defined __DOXYGEN__
#define SNMP_THREAD_PRIO DEFAULT_THREAD_PRIO
#endif
#endif /* SNMP_USE_NETCONN */
/**
* SNMP_TRAP_DESTINATIONS: Number of trap destinations. At least one trap
* destination is required
*/
#if !defined SNMP_TRAP_DESTINATIONS || defined __DOXYGEN__
#define SNMP_TRAP_DESTINATIONS 1
#endif
/**
* Only allow SNMP write actions that are 'safe' (e.g. disabling netifs is not
* a safe action and disabled when SNMP_SAFE_REQUESTS = 1).
* Unsafe requests are disabled by default!
*/
#if !defined SNMP_SAFE_REQUESTS || defined __DOXYGEN__
#define SNMP_SAFE_REQUESTS 1
#endif
/**
* The maximum length of strings used.
*/
#if !defined SNMP_MAX_OCTET_STRING_LEN || defined __DOXYGEN__
#define SNMP_MAX_OCTET_STRING_LEN 127
#endif
/**
* The maximum number of Sub ID's inside an object identifier.
* Indirectly this also limits the maximum depth of SNMP tree.
*/
#if !defined SNMP_MAX_OBJ_ID_LEN || defined __DOXYGEN__
#define SNMP_MAX_OBJ_ID_LEN 50
#endif
#if !defined SNMP_MAX_VALUE_SIZE || defined __DOXYGEN__
/**
* The minimum size of a value.
*/
#define SNMP_MIN_VALUE_SIZE (2 * sizeof(u32_t*)) /* size required to store the basic types (8 bytes for counter64) */
/**
* The maximum size of a value.
*/
#define SNMP_MAX_VALUE_SIZE LWIP_MAX(LWIP_MAX((SNMP_MAX_OCTET_STRING_LEN), sizeof(u32_t)*(SNMP_MAX_OBJ_ID_LEN)), SNMP_MIN_VALUE_SIZE)
#endif
/**
* The snmp read-access community. Used for write-access and traps, too
* unless SNMP_COMMUNITY_WRITE or SNMP_COMMUNITY_TRAP are enabled, respectively.
*/
#if !defined SNMP_COMMUNITY || defined __DOXYGEN__
#define SNMP_COMMUNITY "public"
#endif
/**
* The snmp write-access community.
* Set this community to "" in order to disallow any write access.
*/
#if !defined SNMP_COMMUNITY_WRITE || defined __DOXYGEN__
#define SNMP_COMMUNITY_WRITE "private"
#endif
/**
* The snmp community used for sending traps.
*/
#if !defined SNMP_COMMUNITY_TRAP || defined __DOXYGEN__
#define SNMP_COMMUNITY_TRAP "public"
#endif
/**
* The maximum length of community string.
* If community names shall be adjusted at runtime via snmp_set_community() calls,
* enter here the possible maximum length (+1 for terminating null character).
*/
#if !defined SNMP_MAX_COMMUNITY_STR_LEN || defined __DOXYGEN__
#define SNMP_MAX_COMMUNITY_STR_LEN LWIP_MAX(LWIP_MAX(sizeof(SNMP_COMMUNITY), sizeof(SNMP_COMMUNITY_WRITE)), sizeof(SNMP_COMMUNITY_TRAP))
#endif
/**
* The OID identifiying the device. This may be the enterprise OID itself or any OID located below it in tree.
*/
#if !defined SNMP_DEVICE_ENTERPRISE_OID || defined __DOXYGEN__
#define SNMP_LWIP_ENTERPRISE_OID 26381
/**
* IANA assigned enterprise ID for lwIP is 26381
* @see http://www.iana.org/assignments/enterprise-numbers
*
* @note this enterprise ID is assigned to the lwIP project,
* all object identifiers living under this ID are assigned
* by the lwIP maintainers!
* @note don't change this define, use snmp_set_device_enterprise_oid()
*
* If you need to create your own private MIB you'll need
* to apply for your own enterprise ID with IANA:
* http://www.iana.org/numbers.html
*/
#define SNMP_DEVICE_ENTERPRISE_OID {1, 3, 6, 1, 4, 1, SNMP_LWIP_ENTERPRISE_OID}
/**
* Length of SNMP_DEVICE_ENTERPRISE_OID
*/
#define SNMP_DEVICE_ENTERPRISE_OID_LEN 7
#endif
/**
* SNMP_DEBUG: Enable debugging for SNMP messages.
*/
#if !defined SNMP_DEBUG || defined __DOXYGEN__
#define SNMP_DEBUG LWIP_DBG_OFF
#endif
/**
* SNMP_MIB_DEBUG: Enable debugging for SNMP MIBs.
*/
#if !defined SNMP_MIB_DEBUG || defined __DOXYGEN__
#define SNMP_MIB_DEBUG LWIP_DBG_ON
#endif
/**
* Indicates if the MIB2 implementation of LWIP SNMP stack is used.
*/
#if !defined SNMP_LWIP_MIB2 || defined __DOXYGEN__
#define SNMP_LWIP_MIB2 LWIP_SNMP
#endif
/**
* Value return for sysDesc field of MIB2.
*/
#if !defined SNMP_LWIP_MIB2_SYSDESC || defined __DOXYGEN__
#define SNMP_LWIP_MIB2_SYSDESC "lwIP"
#endif
/**
* Value return for sysName field of MIB2.
* To make sysName field settable, call snmp_mib2_set_sysname() to provide the necessary buffers.
*/
#if !defined SNMP_LWIP_MIB2_SYSNAME || defined __DOXYGEN__
#define SNMP_LWIP_MIB2_SYSNAME "FQDN-unk"
#endif
/**
* Value return for sysContact field of MIB2.
* To make sysContact field settable, call snmp_mib2_set_syscontact() to provide the necessary buffers.
*/
#if !defined SNMP_LWIP_MIB2_SYSCONTACT || defined __DOXYGEN__
#define SNMP_LWIP_MIB2_SYSCONTACT ""
#endif
/**
* Value return for sysLocation field of MIB2.
* To make sysLocation field settable, call snmp_mib2_set_syslocation() to provide the necessary buffers.
*/
#if !defined SNMP_LWIP_MIB2_SYSLOCATION || defined __DOXYGEN__
#define SNMP_LWIP_MIB2_SYSLOCATION ""
#endif
/**
* This value is used to limit the repetitions processed in GetBulk requests (value == 0 means no limitation).
* This may be useful to limit the load for a single request.
* According to SNMP RFC 1905 it is allowed to not return all requested variables from a GetBulk request if system load would be too high.
* so the effect is that the client will do more requests to gather all data.
* For the stack this could be useful in case that SNMP processing is done in TCP/IP thread. In this situation a request with many
* repetitions could block the thread for a longer time. Setting limit here will keep the stack more responsive.
*/
#if !defined SNMP_LWIP_GETBULK_MAX_REPETITIONS || defined __DOXYGEN__
#define SNMP_LWIP_GETBULK_MAX_REPETITIONS 0
#endif
/**
* @}
*/
/*
------------------------------------
---------- SNMPv3 options ----------
------------------------------------
*/
/**
* LWIP_SNMP_V3==1: This enables EXPERIMENTAL SNMPv3 support. LWIP_SNMP must
* also be enabled.
* THIS IS UNDER DEVELOPMENT AND SHOULD NOT BE ENABLED IN PRODUCTS.
*/
#ifndef LWIP_SNMP_V3
#define LWIP_SNMP_V3 0
#endif
#ifndef LWIP_SNMP_V3_MBEDTLS
#define LWIP_SNMP_V3_MBEDTLS LWIP_SNMP_V3
#endif
#ifndef LWIP_SNMP_V3_CRYPTO
#define LWIP_SNMP_V3_CRYPTO LWIP_SNMP_V3_MBEDTLS
#endif
#ifndef LWIP_SNMP_CONFIGURE_VERSIONS
#define LWIP_SNMP_CONFIGURE_VERSIONS 1
#endif
#endif /* LWIP_HDR_SNMP_OPTS_H */

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/**
* @file
* SNMP server MIB API to implement scalar nodes
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Martin Hentschel <info@cl-soft.de>
*
*/
#ifndef LWIP_HDR_APPS_SNMP_SCALAR_H
#define LWIP_HDR_APPS_SNMP_SCALAR_H
#include "lwip/apps/snmp_opts.h"
#include "lwip/apps/snmp_core.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
/** basic scalar node */
struct snmp_scalar_node
{
/** inherited "base class" members */
struct snmp_leaf_node node;
u8_t asn1_type;
snmp_access_t access;
node_instance_get_value_method get_value;
node_instance_set_test_method set_test;
node_instance_set_value_method set_value;
};
snmp_err_t snmp_scalar_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
snmp_err_t snmp_scalar_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
#define SNMP_SCALAR_CREATE_NODE(oid, access, asn1_type, get_value_method, set_test_method, set_value_method) \
{{{ SNMP_NODE_SCALAR, (oid) }, \
snmp_scalar_get_instance, \
snmp_scalar_get_next_instance }, \
(asn1_type), (access), (get_value_method), (set_test_method), (set_value_method) }
#define SNMP_SCALAR_CREATE_NODE_READONLY(oid, asn1_type, get_value_method) SNMP_SCALAR_CREATE_NODE(oid, SNMP_NODE_INSTANCE_READ_ONLY, asn1_type, get_value_method, NULL, NULL)
/** scalar array node - a tree node which contains scalars only as children */
struct snmp_scalar_array_node_def
{
u32_t oid;
u8_t asn1_type;
snmp_access_t access;
};
typedef s16_t (*snmp_scalar_array_get_value_method)(const struct snmp_scalar_array_node_def*, void*);
typedef snmp_err_t (*snmp_scalar_array_set_test_method)(const struct snmp_scalar_array_node_def*, u16_t, void*);
typedef snmp_err_t (*snmp_scalar_array_set_value_method)(const struct snmp_scalar_array_node_def*, u16_t, void*);
/** basic scalar array node */
struct snmp_scalar_array_node
{
/** inherited "base class" members */
struct snmp_leaf_node node;
u16_t array_node_count;
const struct snmp_scalar_array_node_def* array_nodes;
snmp_scalar_array_get_value_method get_value;
snmp_scalar_array_set_test_method set_test;
snmp_scalar_array_set_value_method set_value;
};
snmp_err_t snmp_scalar_array_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
snmp_err_t snmp_scalar_array_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
#define SNMP_SCALAR_CREATE_ARRAY_NODE(oid, array_nodes, get_value_method, set_test_method, set_value_method) \
{{{ SNMP_NODE_SCALAR_ARRAY, (oid) }, \
snmp_scalar_array_get_instance, \
snmp_scalar_array_get_next_instance }, \
(u16_t)LWIP_ARRAYSIZE(array_nodes), (array_nodes), (get_value_method), (set_test_method), (set_value_method) }
#endif /* LWIP_SNMP */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_SNMP_SCALAR_H */

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/*
Generated by LwipMibCompiler
*/
#ifndef LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H
#define LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H
#include "lwip/apps/snmp_opts.h"
#if LWIP_SNMP
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include "lwip/apps/snmp_core.h"
extern const struct snmp_obj_id usmNoAuthProtocol;
extern const struct snmp_obj_id usmHMACMD5AuthProtocol;
extern const struct snmp_obj_id usmHMACSHAAuthProtocol;
extern const struct snmp_obj_id usmNoPrivProtocol;
extern const struct snmp_obj_id usmDESPrivProtocol;
extern const struct snmp_obj_id usmAESPrivProtocol;
extern const struct snmp_mib snmpframeworkmib;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LWIP_SNMP */
#endif /* LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H */

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/*
Generated by LwipMibCompiler
*/
#ifndef LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H
#define LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H
#include "lwip/apps/snmp_opts.h"
#if LWIP_SNMP
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include "lwip/apps/snmp_core.h"
extern const struct snmp_mib snmpusmmib;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LWIP_SNMP */
#endif /* LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H */

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/**
* @file
* SNMP server MIB API to implement table nodes
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Martin Hentschel <info@cl-soft.de>
*
*/
#ifndef LWIP_HDR_APPS_SNMP_TABLE_H
#define LWIP_HDR_APPS_SNMP_TABLE_H
#include "lwip/apps/snmp_opts.h"
#include "lwip/apps/snmp_core.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
/** default (customizable) read/write table */
struct snmp_table_col_def
{
u32_t index;
u8_t asn1_type;
snmp_access_t access;
};
/** table node */
struct snmp_table_node
{
/** inherited "base class" members */
struct snmp_leaf_node node;
u16_t column_count;
const struct snmp_table_col_def* columns;
snmp_err_t (*get_cell_instance)(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, struct snmp_node_instance* cell_instance);
snmp_err_t (*get_next_cell_instance)(const u32_t* column, struct snmp_obj_id* row_oid, struct snmp_node_instance* cell_instance);
/** returns object value for the given object identifier */
node_instance_get_value_method get_value;
/** tests length and/or range BEFORE setting */
node_instance_set_test_method set_test;
/** sets object value, only called when set_test() was successful */
node_instance_set_value_method set_value;
};
snmp_err_t snmp_table_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
snmp_err_t snmp_table_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
#define SNMP_TABLE_CREATE(oid, columns, get_cell_instance_method, get_next_cell_instance_method, get_value_method, set_test_method, set_value_method) \
{{{ SNMP_NODE_TABLE, (oid) }, \
snmp_table_get_instance, \
snmp_table_get_next_instance }, \
(u16_t)LWIP_ARRAYSIZE(columns), (columns), \
(get_cell_instance_method), (get_next_cell_instance_method), \
(get_value_method), (set_test_method), (set_value_method)}
#define SNMP_TABLE_GET_COLUMN_FROM_OID(oid) ((oid)[1]) /* first array value is (fixed) row entry (fixed to 1) and 2nd value is column, follow3ed by instance */
/** simple read-only table */
typedef enum {
SNMP_VARIANT_VALUE_TYPE_U32,
SNMP_VARIANT_VALUE_TYPE_S32,
SNMP_VARIANT_VALUE_TYPE_PTR,
SNMP_VARIANT_VALUE_TYPE_CONST_PTR
} snmp_table_column_data_type_t;
struct snmp_table_simple_col_def
{
u32_t index;
u8_t asn1_type;
snmp_table_column_data_type_t data_type; /* depending of what union member is used to store the value*/
};
/** simple read-only table node */
struct snmp_table_simple_node
{
/* inherited "base class" members */
struct snmp_leaf_node node;
u16_t column_count;
const struct snmp_table_simple_col_def* columns;
snmp_err_t (*get_cell_value)(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len);
snmp_err_t (*get_next_cell_instance_and_value)(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len);
};
snmp_err_t snmp_table_simple_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
snmp_err_t snmp_table_simple_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
#define SNMP_TABLE_CREATE_SIMPLE(oid, columns, get_cell_value_method, get_next_cell_instance_and_value_method) \
{{{ SNMP_NODE_TABLE, (oid) }, \
snmp_table_simple_get_instance, \
snmp_table_simple_get_next_instance }, \
(u16_t)LWIP_ARRAYSIZE(columns), (columns), (get_cell_value_method), (get_next_cell_instance_and_value_method) }
s16_t snmp_table_extract_value_from_s32ref(struct snmp_node_instance* instance, void* value);
s16_t snmp_table_extract_value_from_u32ref(struct snmp_node_instance* instance, void* value);
s16_t snmp_table_extract_value_from_refconstptr(struct snmp_node_instance* instance, void* value);
#endif /* LWIP_SNMP */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_SNMP_TABLE_H */

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/**
* @file
* SNMP server MIB API to implement thread synchronization
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Dirk Ziegelmeier <dziegel@gmx.de>
*
*/
#ifndef LWIP_HDR_APPS_SNMP_THREADSYNC_H
#define LWIP_HDR_APPS_SNMP_THREADSYNC_H
#include "lwip/apps/snmp_opts.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
#include "lwip/apps/snmp_core.h"
#include "lwip/sys.h"
typedef void (*snmp_threadsync_called_fn)(void* arg);
typedef void (*snmp_threadsync_synchronizer_fn)(snmp_threadsync_called_fn fn, void* arg);
/** Thread sync runtime data. For internal usage only. */
struct threadsync_data
{
union {
snmp_err_t err;
s16_t s16;
} retval;
union {
const u32_t *root_oid;
void *value;
} arg1;
union {
u8_t root_oid_len;
u16_t len;
} arg2;
const struct snmp_threadsync_node *threadsync_node;
struct snmp_node_instance proxy_instance;
};
/** Thread sync instance. Needed EXCATLY once for every thread to be synced into. */
struct snmp_threadsync_instance
{
sys_sem_t sem;
sys_mutex_t sem_usage_mutex;
snmp_threadsync_synchronizer_fn sync_fn;
struct threadsync_data data;
};
/** SNMP thread sync proxy leaf node */
struct snmp_threadsync_node
{
/* inherited "base class" members */
struct snmp_leaf_node node;
const struct snmp_leaf_node *target;
struct snmp_threadsync_instance *instance;
};
snmp_err_t snmp_threadsync_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
snmp_err_t snmp_threadsync_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
/** Create thread sync proxy node */
#define SNMP_CREATE_THREAD_SYNC_NODE(oid, target_leaf_node, threadsync_instance) \
{{{ SNMP_NODE_THREADSYNC, (oid) }, \
snmp_threadsync_get_instance, \
snmp_threadsync_get_next_instance }, \
(target_leaf_node), \
(threadsync_instance) }
/** Create thread sync instance data */
void snmp_threadsync_init(struct snmp_threadsync_instance *instance, snmp_threadsync_synchronizer_fn sync_fn);
#endif /* LWIP_SNMP */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_SNMP_THREADSYNC_H */

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/**
* @file
* Additional SNMPv3 functionality RFC3414 and RFC3826.
*/
/*
* Copyright (c) 2016 Elias Oenal.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Elias Oenal <lwip@eliasoenal.com>
*/
#ifndef LWIP_HDR_APPS_SNMP_V3_H
#define LWIP_HDR_APPS_SNMP_V3_H
#include "lwip/apps/snmp_opts.h"
#include "lwip/err.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_SNMP && LWIP_SNMP_V3
typedef enum
{
SNMP_V3_AUTH_ALGO_INVAL = 0,
SNMP_V3_AUTH_ALGO_MD5 = 1,
SNMP_V3_AUTH_ALGO_SHA = 2
} snmpv3_auth_algo_t;
typedef enum
{
SNMP_V3_PRIV_ALGO_INVAL = 0,
SNMP_V3_PRIV_ALGO_DES = 1,
SNMP_V3_PRIV_ALGO_AES = 2
} snmpv3_priv_algo_t;
typedef enum
{
SNMP_V3_USER_STORAGETYPE_OTHER = 1,
SNMP_V3_USER_STORAGETYPE_VOLATILE = 2,
SNMP_V3_USER_STORAGETYPE_NONVOLATILE = 3,
SNMP_V3_USER_STORAGETYPE_PERMANENT = 4,
SNMP_V3_USER_STORAGETYPE_READONLY = 5
} snmpv3_user_storagetype_t;
/*
* The following callback functions must be implemented by the application.
* There is a dummy implementation in snmpv3_dummy.c.
*/
void snmpv3_get_engine_id(const char **id, u8_t *len);
err_t snmpv3_set_engine_id(const char* id, u8_t len);
u32_t snmpv3_get_engine_boots(void);
void snmpv3_set_engine_boots(u32_t boots);
u32_t snmpv3_get_engine_time(void);
void snmpv3_reset_engine_time(void);
err_t snmpv3_get_user(const char* username, snmpv3_auth_algo_t *auth_algo, u8_t *auth_key, snmpv3_priv_algo_t *priv_algo, u8_t *priv_key);
u8_t snmpv3_get_amount_of_users(void);
err_t snmpv3_get_user_storagetype(const char *username, snmpv3_user_storagetype_t *storagetype);
err_t snmpv3_get_username(char *username, u8_t index);
/* The following functions are provided by the SNMPv3 agent */
void snmpv3_engine_id_changed(void);
s32_t snmpv3_get_engine_time_internal(void);
void snmpv3_password_to_key_md5(
const u8_t *password, /* IN */
size_t passwordlen, /* IN */
const u8_t *engineID, /* IN - pointer to snmpEngineID */
u8_t engineLength, /* IN - length of snmpEngineID */
u8_t *key); /* OUT - pointer to caller 16-octet buffer */
void snmpv3_password_to_key_sha(
const u8_t *password, /* IN */
size_t passwordlen, /* IN */
const u8_t *engineID, /* IN - pointer to snmpEngineID */
u8_t engineLength, /* IN - length of snmpEngineID */
u8_t *key); /* OUT - pointer to caller 20-octet buffer */
#endif
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_SNMP_V3_H */

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/**
* @file
* SNTP client API
*/
/*
* Copyright (c) 2007-2009 Frédéric Bernon, Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Frédéric Bernon, Simon Goldschmidt
*
*/
#ifndef LWIP_HDR_APPS_SNTP_H
#define LWIP_HDR_APPS_SNTP_H
#include "lwip/apps/sntp_opts.h"
#include "lwip/ip_addr.h"
#ifdef __cplusplus
extern "C" {
#endif
/* SNTP operating modes: default is to poll using unicast.
The mode has to be set before calling sntp_init(). */
#define SNTP_OPMODE_POLL 0
#define SNTP_OPMODE_LISTENONLY 1
void sntp_setoperatingmode(u8_t operating_mode);
u8_t sntp_getoperatingmode(void);
void sntp_init(void);
void sntp_stop(void);
u8_t sntp_enabled(void);
void sntp_setserver(u8_t idx, const ip_addr_t *addr);
const ip_addr_t* sntp_getserver(u8_t idx);
#if SNTP_MONITOR_SERVER_REACHABILITY
u8_t sntp_getreachability(u8_t idx);
#endif /* SNTP_MONITOR_SERVER_REACHABILITY */
#if SNTP_SERVER_DNS
void sntp_setservername(u8_t idx, const char *server);
const char *sntp_getservername(u8_t idx);
#endif /* SNTP_SERVER_DNS */
#if SNTP_GET_SERVERS_FROM_DHCP
void sntp_servermode_dhcp(int set_servers_from_dhcp);
#else /* SNTP_GET_SERVERS_FROM_DHCP */
#define sntp_servermode_dhcp(x)
#endif /* SNTP_GET_SERVERS_FROM_DHCP */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_SNTP_H */

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/**
* @file
* SNTP client options list
*/
/*
* Copyright (c) 2007-2009 Frédéric Bernon, Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Frédéric Bernon, Simon Goldschmidt
*
*/
#ifndef LWIP_HDR_APPS_SNTP_OPTS_H
#define LWIP_HDR_APPS_SNTP_OPTS_H
#include "lwip/opt.h"
#include "lwip/prot/iana.h"
/**
* @defgroup sntp_opts Options
* @ingroup sntp
* @{
*/
/** SNTP macro to change system time in seconds
* Define SNTP_SET_SYSTEM_TIME_US(sec, us) to set the time in microseconds
* instead of this one if you need the additional precision. Alternatively,
* define SNTP_SET_SYSTEM_TIME_NTP(sec, frac) in order to work with native
* NTP timestamps instead.
*/
#if !defined SNTP_SET_SYSTEM_TIME || defined __DOXYGEN__
#define SNTP_SET_SYSTEM_TIME(sec) LWIP_UNUSED_ARG(sec)
#endif
/** The maximum number of SNTP servers that can be set */
#if !defined SNTP_MAX_SERVERS || defined __DOXYGEN__
#define SNTP_MAX_SERVERS LWIP_DHCP_MAX_NTP_SERVERS
#endif
/** Set this to 1 to implement the callback function called by dhcp when
* NTP servers are received. */
#if !defined SNTP_GET_SERVERS_FROM_DHCP || defined __DOXYGEN__
#define SNTP_GET_SERVERS_FROM_DHCP LWIP_DHCP_GET_NTP_SRV
#endif
/** Set this to 1 to support DNS names (or IP address strings) to set sntp servers
* One server address/name can be defined as default if SNTP_SERVER_DNS == 1:
* \#define SNTP_SERVER_ADDRESS "pool.ntp.org"
*/
#if !defined SNTP_SERVER_DNS || defined __DOXYGEN__
#define SNTP_SERVER_DNS 0
#endif
/**
* SNTP_DEBUG: Enable debugging for SNTP.
*/
#if !defined SNTP_DEBUG || defined __DOXYGEN__
#define SNTP_DEBUG LWIP_DBG_OFF
#endif
/** SNTP server port */
#if !defined SNTP_PORT || defined __DOXYGEN__
#define SNTP_PORT LWIP_IANA_PORT_SNTP
#endif
/** Sanity check:
* Define this to
* - 0 to turn off sanity checks (default; smaller code)
* - >= 1 to check address and port of the response packet to ensure the
* response comes from the server we sent the request to.
* - >= 2 to check returned Originate Timestamp against Transmit Timestamp
* sent to the server (to ensure response to older request).
* - >= 3 @todo: discard reply if any of the VN, Stratum, or Transmit Timestamp
* fields is 0 or the Mode field is not 4 (unicast) or 5 (broadcast).
* - >= 4 @todo: to check that the Root Delay and Root Dispersion fields are each
* greater than or equal to 0 and less than infinity, where infinity is
* currently a cozy number like one second. This check avoids using a
* server whose synchronization source has expired for a very long time.
*/
#if !defined SNTP_CHECK_RESPONSE || defined __DOXYGEN__
#define SNTP_CHECK_RESPONSE 0
#endif
/** Enable round-trip delay compensation.
* Compensate for the round-trip delay by calculating the clock offset from
* the originate, receive, transmit and destination timestamps, as per RFC.
*
* The calculation requires compiler support for 64-bit integers. Also, either
* SNTP_SET_SYSTEM_TIME_US or SNTP_SET_SYSTEM_TIME_NTP has to be implemented
* for setting the system clock with sub-second precision. Likewise, either
* SNTP_GET_SYSTEM_TIME or SNTP_GET_SYSTEM_TIME_NTP needs to be implemented
* with sub-second precision.
*
* Although not strictly required, it makes sense to combine this option with
* SNTP_CHECK_RESPONSE >= 2 for sanity-checking of the received timestamps.
* Also, in order for the round-trip calculation to work, the difference
* between the local clock and the NTP server clock must not be larger than
* about 34 years. If that limit is exceeded, the implementation will fall back
* to setting the clock without compensation. In order to ensure that the local
* clock is always within the permitted range for compensation, even at first
* try, it may be necessary to store at least the current year in non-volatile
* memory.
*/
#if !defined SNTP_COMP_ROUNDTRIP || defined __DOXYGEN__
#define SNTP_COMP_ROUNDTRIP 0
#endif
/** According to the RFC, this shall be a random delay
* between 1 and 5 minutes (in milliseconds) to prevent load peaks.
* This can be defined to a random generation function,
* which must return the delay in milliseconds as u32_t.
* Turned off by default.
*/
#if !defined SNTP_STARTUP_DELAY || defined __DOXYGEN__
#ifdef LWIP_RAND
#define SNTP_STARTUP_DELAY 1
#else
#define SNTP_STARTUP_DELAY 0
#endif
#endif
/** If you want the startup delay to be a function, define this
* to a function (including the brackets) and define SNTP_STARTUP_DELAY to 1.
*/
#if !defined SNTP_STARTUP_DELAY_FUNC || defined __DOXYGEN__
#define SNTP_STARTUP_DELAY_FUNC (LWIP_RAND() % 5000)
#endif
/** SNTP receive timeout - in milliseconds
* Also used as retry timeout - this shouldn't be too low.
* Default is 15 seconds. Must not be beolw 15 seconds by specification (i.e. 15000)
*/
#if !defined SNTP_RECV_TIMEOUT || defined __DOXYGEN__
#define SNTP_RECV_TIMEOUT 15000
#endif
/** SNTP update delay - in milliseconds
* Default is 1 hour. Must not be beolw 60 seconds by specification (i.e. 60000)
*/
#if !defined SNTP_UPDATE_DELAY || defined __DOXYGEN__
#define SNTP_UPDATE_DELAY 3600000
#endif
/** SNTP macro to get system time, used with SNTP_CHECK_RESPONSE >= 2
* to send in request and compare in response. Also used for round-trip
* delay compensation if SNTP_COMP_ROUNDTRIP != 0.
* Alternatively, define SNTP_GET_SYSTEM_TIME_NTP(sec, frac) in order to
* work with native NTP timestamps instead.
*/
#if !defined SNTP_GET_SYSTEM_TIME || defined __DOXYGEN__
#define SNTP_GET_SYSTEM_TIME(sec, us) do { (sec) = 0; (us) = 0; } while(0)
#endif
/** Default retry timeout (in milliseconds) if the response
* received is invalid.
* This is doubled with each retry until SNTP_RETRY_TIMEOUT_MAX is reached.
*/
#if !defined SNTP_RETRY_TIMEOUT || defined __DOXYGEN__
#define SNTP_RETRY_TIMEOUT SNTP_RECV_TIMEOUT
#endif
/** Maximum retry timeout (in milliseconds). */
#if !defined SNTP_RETRY_TIMEOUT_MAX || defined __DOXYGEN__
#define SNTP_RETRY_TIMEOUT_MAX (SNTP_RETRY_TIMEOUT * 10)
#endif
/** Increase retry timeout with every retry sent
* Default is on to conform to RFC.
*/
#if !defined SNTP_RETRY_TIMEOUT_EXP || defined __DOXYGEN__
#define SNTP_RETRY_TIMEOUT_EXP 1
#endif
/** Keep a reachability shift register per server
* Default is on to conform to RFC.
*/
#if !defined SNTP_MONITOR_SERVER_REACHABILITY || defined __DOXYGEN__
#define SNTP_MONITOR_SERVER_REACHABILITY 1
#endif
/**
* @}
*/
#endif /* LWIP_HDR_APPS_SNTP_OPTS_H */

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/**
*
* @file tftp_opts.h
*
* @author Logan Gunthorpe <logang@deltatee.com>
*
* @brief Trivial File Transfer Protocol (RFC 1350) implementation options
*
* Copyright (c) Deltatee Enterprises Ltd. 2013
* All rights reserved.
*
*/
/*
* Redistribution and use in source and binary forms, with or without
* modification,are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Author: Logan Gunthorpe <logang@deltatee.com>
*
*/
#ifndef LWIP_HDR_APPS_TFTP_OPTS_H
#define LWIP_HDR_APPS_TFTP_OPTS_H
#include "lwip/opt.h"
#include "lwip/prot/iana.h"
/**
* @defgroup tftp_opts Options
* @ingroup tftp
* @{
*/
/**
* Enable TFTP debug messages
*/
#if !defined TFTP_DEBUG || defined __DOXYGEN__
#define TFTP_DEBUG LWIP_DBG_OFF
#endif
/**
* TFTP server port
*/
#if !defined TFTP_PORT || defined __DOXYGEN__
#define TFTP_PORT LWIP_IANA_PORT_TFTP
#endif
/**
* TFTP timeout
*/
#if !defined TFTP_TIMEOUT_MSECS || defined __DOXYGEN__
#define TFTP_TIMEOUT_MSECS 10000
#endif
/**
* Max. number of retries when a file is read from server
*/
#if !defined TFTP_MAX_RETRIES || defined __DOXYGEN__
#define TFTP_MAX_RETRIES 5
#endif
/**
* TFTP timer cyclic interval
*/
#if !defined TFTP_TIMER_MSECS || defined __DOXYGEN__
#define TFTP_TIMER_MSECS (TFTP_TIMEOUT_MSECS / 10)
#endif
/**
* Max. length of TFTP filename
*/
#if !defined TFTP_MAX_FILENAME_LEN || defined __DOXYGEN__
#define TFTP_MAX_FILENAME_LEN 20
#endif
/**
* Max. length of TFTP mode
*/
#if !defined TFTP_MAX_MODE_LEN || defined __DOXYGEN__
#define TFTP_MAX_MODE_LEN 7
#endif
/**
* @}
*/
#endif /* LWIP_HDR_APPS_TFTP_OPTS_H */

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/**
*
* @file tftp_server.h
*
* @author Logan Gunthorpe <logang@deltatee.com>
*
* @brief Trivial File Transfer Protocol (RFC 1350)
*
* Copyright (c) Deltatee Enterprises Ltd. 2013
* All rights reserved.
*
*/
/*
* Redistribution and use in source and binary forms, with or without
* modification,are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Author: Logan Gunthorpe <logang@deltatee.com>
*
*/
#ifndef LWIP_HDR_APPS_TFTP_SERVER_H
#define LWIP_HDR_APPS_TFTP_SERVER_H
#include "lwip/apps/tftp_opts.h"
#include "lwip/err.h"
#include "lwip/pbuf.h"
#ifdef __cplusplus
extern "C" {
#endif
/** @ingroup tftp
* TFTP context containing callback functions for TFTP transfers
*/
struct tftp_context {
/**
* Open file for read/write.
* @param fname Filename
* @param mode Mode string from TFTP RFC 1350 (netascii, octet, mail)
* @param write Flag indicating read (0) or write (!= 0) access
* @returns File handle supplied to other functions
*/
void* (*open)(const char* fname, const char* mode, u8_t write);
/**
* Close file handle
* @param handle File handle returned by open()
*/
void (*close)(void* handle);
/**
* Read from file
* @param handle File handle returned by open()
* @param buf Target buffer to copy read data to
* @param bytes Number of bytes to copy to buf
* @returns &gt;= 0: Success; &lt; 0: Error
*/
int (*read)(void* handle, void* buf, int bytes);
/**
* Write to file
* @param handle File handle returned by open()
* @param pbuf PBUF adjusted such that payload pointer points
* to the beginning of write data. In other words,
* TFTP headers are stripped off.
* @returns &gt;= 0: Success; &lt; 0: Error
*/
int (*write)(void* handle, struct pbuf* p);
};
err_t tftp_init(const struct tftp_context* ctx);
void tftp_cleanup(void);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_APPS_TFTP_SERVER_H */

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/**
* @file
* Support for different processor and compiler architectures
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_ARCH_H
#define LWIP_HDR_ARCH_H
#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN 1234
#endif
#ifndef BIG_ENDIAN
#define BIG_ENDIAN 4321
#endif
//#include "arch/cc.h"
/**
* @defgroup compiler_abstraction Compiler/platform abstraction
* @ingroup sys_layer
* All defines related to this section must not be placed in lwipopts.h,
* but in arch/cc.h!
* If the compiler does not provide memset() this file must include a
* definition of it, or include a file which defines it.
* These options cannot be \#defined in lwipopts.h since they are not options
* of lwIP itself, but options of the lwIP port to your system.
* @{
*/
/** Define the byte order of the system.
* Needed for conversion of network data to host byte order.
* Allowed values: LITTLE_ENDIAN and BIG_ENDIAN
*/
#ifndef BYTE_ORDER
#define BYTE_ORDER LITTLE_ENDIAN
#endif
/** Define random number generator function of your system */
#ifdef __DOXYGEN__
#define LWIP_RAND() ((u32_t)rand())
#endif
/** Platform specific diagnostic output.\n
* Note the default implementation pulls in printf, which may
* in turn pull in a lot of standard libary code. In resource-constrained
* systems, this should be defined to something less resource-consuming.
*/
#ifndef LWIP_PLATFORM_DIAG
#define LWIP_PLATFORM_DIAG(x) do {printf x;} while(0)
#include <stdio.h>
#include <stdlib.h>
#endif
/** Platform specific assertion handling.\n
* Note the default implementation pulls in printf, fflush and abort, which may
* in turn pull in a lot of standard libary code. In resource-constrained
* systems, this should be defined to something less resource-consuming.
*/
#ifndef LWIP_PLATFORM_ASSERT
#define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion \"%s\" failed at line %d in %s\n", \
x, __LINE__, __FILE__); fflush(NULL); abort();} while(0)
#include <stdio.h>
#include <stdlib.h>
#endif
/** Define this to 1 in arch/cc.h of your port if you do not want to
* include stddef.h header to get size_t. You need to typedef size_t
* by yourself in this case.
*/
#ifndef LWIP_NO_STDDEF_H
#define LWIP_NO_STDDEF_H 0
#endif
#if !LWIP_NO_STDDEF_H
#include <stddef.h> /* for size_t */
#endif
/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
* the stdint.h header. You need to typedef the generic types listed in
* lwip/arch.h yourself in this case (u8_t, u16_t...).
*/
#ifndef LWIP_NO_STDINT_H
#define LWIP_NO_STDINT_H 0
#endif
/* Define generic types used in lwIP */
#if !LWIP_NO_STDINT_H
#include <stdint.h>
/* stdint.h is C99 which should also provide support for 64-bit integers */
#if !defined(LWIP_HAVE_INT64) && defined(UINT64_MAX)
#define LWIP_HAVE_INT64 1
#endif
typedef uint8_t u8_t;
typedef int8_t s8_t;
typedef uint16_t u16_t;
typedef int16_t s16_t;
typedef uint32_t u32_t;
typedef int32_t s32_t;
#if LWIP_HAVE_INT64
typedef uint64_t u64_t;
typedef int64_t s64_t;
#endif
typedef uintptr_t mem_ptr_t;
#endif
/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
* the inttypes.h header. You need to define the format strings listed in
* lwip/arch.h yourself in this case (X8_F, U16_F...).
*/
#ifndef LWIP_NO_INTTYPES_H
#define LWIP_NO_INTTYPES_H 0
#endif
/* Define (sn)printf formatters for these lwIP types */
#if !LWIP_NO_INTTYPES_H
#include <inttypes.h>
#ifndef X8_F
#define X8_F "02" PRIx8
#endif
#ifndef U16_F
#define U16_F PRIu16
#endif
#ifndef S16_F
#define S16_F PRId16
#endif
#ifndef X16_F
#define X16_F PRIx16
#endif
#ifndef U32_F
#define U32_F PRIu32
#endif
#ifndef S32_F
#define S32_F PRId32
#endif
#ifndef X32_F
#define X32_F PRIx32
#endif
#ifndef SZT_F
#define SZT_F PRIuPTR
#endif
#endif
/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
* the limits.h header. You need to define the type limits yourself in this case
* (e.g. INT_MAX, SSIZE_MAX).
*/
#ifndef LWIP_NO_LIMITS_H
#define LWIP_NO_LIMITS_H 0
#endif
/* Include limits.h? */
#if !LWIP_NO_LIMITS_H
#include <limits.h>
#endif
/* Do we need to define ssize_t? This is a compatibility hack:
* Unfortunately, this type seems to be unavailable on some systems (even if
* sys/types or unistd.h are available).
* Being like that, we define it to 'int' if SSIZE_MAX is not defined.
*/
#ifdef SSIZE_MAX
/* If SSIZE_MAX is defined, unistd.h should provide the type as well */
#ifndef LWIP_NO_UNISTD_H
#define LWIP_NO_UNISTD_H 0
#endif
#if !LWIP_NO_UNISTD_H
#include <unistd.h>
#endif
#else /* SSIZE_MAX */
typedef int ssize_t;
#define SSIZE_MAX INT_MAX
#endif /* SSIZE_MAX */
/* some maximum values needed in lwip code */
#define LWIP_UINT32_MAX 0xffffffff
/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
* the ctype.h header. If ctype.h is available, a few character functions
* are mapped to the appropriate functions (lwip_islower, lwip_isdigit...), if
* not, a private implementation is provided.
*/
#ifndef LWIP_NO_CTYPE_H
#define LWIP_NO_CTYPE_H 0
#endif
#if LWIP_NO_CTYPE_H
#define lwip_in_range(c, lo, up) ((u8_t)(c) >= (lo) && (u8_t)(c) <= (up))
#define lwip_isdigit(c) lwip_in_range((c), '0', '9')
#define lwip_isxdigit(c) (lwip_isdigit(c) || lwip_in_range((c), 'a', 'f') || lwip_in_range((c), 'A', 'F'))
#define lwip_islower(c) lwip_in_range((c), 'a', 'z')
#define lwip_isspace(c) ((c) == ' ' || (c) == '\f' || (c) == '\n' || (c) == '\r' || (c) == '\t' || (c) == '\v')
#define lwip_isupper(c) lwip_in_range((c), 'A', 'Z')
#define lwip_tolower(c) (lwip_isupper(c) ? (c) - 'A' + 'a' : c)
#define lwip_toupper(c) (lwip_islower(c) ? (c) - 'a' + 'A' : c)
#else
#include <ctype.h>
#define lwip_isdigit(c) isdigit((unsigned char)(c))
#define lwip_isxdigit(c) isxdigit((unsigned char)(c))
#define lwip_islower(c) islower((unsigned char)(c))
#define lwip_isspace(c) isspace((unsigned char)(c))
#define lwip_isupper(c) isupper((unsigned char)(c))
#define lwip_tolower(c) tolower((unsigned char)(c))
#define lwip_toupper(c) toupper((unsigned char)(c))
#endif
/** C++ const_cast<target_type>(val) equivalent to remove constness from a value (GCC -Wcast-qual) */
#ifndef LWIP_CONST_CAST
#define LWIP_CONST_CAST(target_type, val) ((target_type)((ptrdiff_t)val))
#endif
/** Get rid of alignment cast warnings (GCC -Wcast-align) */
#ifndef LWIP_ALIGNMENT_CAST
#define LWIP_ALIGNMENT_CAST(target_type, val) LWIP_CONST_CAST(target_type, val)
#endif
/** Get rid of warnings related to pointer-to-numeric and vice-versa casts,
* e.g. "conversion from 'u8_t' to 'void *' of greater size"
*/
#ifndef LWIP_PTR_NUMERIC_CAST
#define LWIP_PTR_NUMERIC_CAST(target_type, val) LWIP_CONST_CAST(target_type, val)
#endif
/** Avoid warnings/errors related to implicitly casting away packed attributes by doing a explicit cast */
#ifndef LWIP_PACKED_CAST
#define LWIP_PACKED_CAST(target_type, val) LWIP_CONST_CAST(target_type, val)
#endif
/** Allocates a memory buffer of specified size that is of sufficient size to align
* its start address using LWIP_MEM_ALIGN.
* You can declare your own version here e.g. to enforce alignment without adding
* trailing padding bytes (see LWIP_MEM_ALIGN_BUFFER) or your own section placement
* requirements.\n
* e.g. if you use gcc and need 32 bit alignment:\n
* \#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[size] \_\_attribute\_\_((aligned(4)))\n
* or more portable:\n
* \#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u32_t variable_name[(size + sizeof(u32_t) - 1) / sizeof(u32_t)]
*/
#ifndef LWIP_DECLARE_MEMORY_ALIGNED
#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[LWIP_MEM_ALIGN_BUFFER(size)]
#endif
/** Calculate memory size for an aligned buffer - returns the next highest
* multiple of MEM_ALIGNMENT (e.g. LWIP_MEM_ALIGN_SIZE(3) and
* LWIP_MEM_ALIGN_SIZE(4) will both yield 4 for MEM_ALIGNMENT == 4).
*/
#ifndef LWIP_MEM_ALIGN_SIZE
#define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1U) & ~(MEM_ALIGNMENT-1U))
#endif
/** Calculate safe memory size for an aligned buffer when using an unaligned
* type as storage. This includes a safety-margin on (MEM_ALIGNMENT - 1) at the
* start (e.g. if buffer is u8_t[] and actual data will be u32_t*)
*/
#ifndef LWIP_MEM_ALIGN_BUFFER
#define LWIP_MEM_ALIGN_BUFFER(size) (((size) + MEM_ALIGNMENT - 1U))
#endif
/** Align a memory pointer to the alignment defined by MEM_ALIGNMENT
* so that ADDR % MEM_ALIGNMENT == 0
*/
#ifndef LWIP_MEM_ALIGN
#define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
#endif
#ifdef __cplusplus
extern "C" {
#endif
/** Packed structs support.
* Placed BEFORE declaration of a packed struct.\n
* For examples of packed struct declarations, see include/lwip/prot/ subfolder.\n
* A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
*/
#ifndef PACK_STRUCT_BEGIN
#define PACK_STRUCT_BEGIN
#endif /* PACK_STRUCT_BEGIN */
/** Packed structs support.
* Placed AFTER declaration of a packed struct.\n
* For examples of packed struct declarations, see include/lwip/prot/ subfolder.\n
* A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
*/
#ifndef PACK_STRUCT_END
#define PACK_STRUCT_END
#endif /* PACK_STRUCT_END */
/** Packed structs support.
* Placed between end of declaration of a packed struct and trailing semicolon.\n
* For examples of packed struct declarations, see include/lwip/prot/ subfolder.\n
* A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
*/
#ifndef PACK_STRUCT_STRUCT
#if defined(__GNUC__) || defined(__clang__)
#define PACK_STRUCT_STRUCT __attribute__((packed))
#else
#define PACK_STRUCT_STRUCT
#endif
#endif /* PACK_STRUCT_STRUCT */
/** Packed structs support.
* Wraps u32_t and u16_t members.\n
* For examples of packed struct declarations, see include/lwip/prot/ subfolder.\n
* A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
*/
#ifndef PACK_STRUCT_FIELD
#define PACK_STRUCT_FIELD(x) x
#endif /* PACK_STRUCT_FIELD */
/** Packed structs support.
* Wraps u8_t members, where some compilers warn that packing is not necessary.\n
* For examples of packed struct declarations, see include/lwip/prot/ subfolder.\n
* A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
*/
#ifndef PACK_STRUCT_FLD_8
#define PACK_STRUCT_FLD_8(x) PACK_STRUCT_FIELD(x)
#endif /* PACK_STRUCT_FLD_8 */
/** Packed structs support.
* Wraps members that are packed structs themselves, where some compilers warn that packing is not necessary.\n
* For examples of packed struct declarations, see include/lwip/prot/ subfolder.\n
* A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
*/
#ifndef PACK_STRUCT_FLD_S
#define PACK_STRUCT_FLD_S(x) PACK_STRUCT_FIELD(x)
#endif /* PACK_STRUCT_FLD_S */
/** PACK_STRUCT_USE_INCLUDES==1: Packed structs support using \#include files before and after struct to be packed.\n
* The file included BEFORE the struct is "arch/bpstruct.h".\n
* The file included AFTER the struct is "arch/epstruct.h".\n
* This can be used to implement struct packing on MS Visual C compilers, see
* the Win32 port in the lwIP contrib repository for reference.
* For examples of packed struct declarations, see include/lwip/prot/ subfolder.\n
* A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
*/
#ifdef __DOXYGEN__
#define PACK_STRUCT_USE_INCLUDES
#endif
/** Eliminates compiler warning about unused arguments (GCC -Wextra -Wunused). */
#ifndef LWIP_UNUSED_ARG
#define LWIP_UNUSED_ARG(x) (void)x
#endif /* LWIP_UNUSED_ARG */
/** LWIP_PROVIDE_ERRNO==1: Let lwIP provide ERRNO values and the 'errno' variable.
* If this is disabled, cc.h must either define 'errno', include <errno.h>,
* define LWIP_ERRNO_STDINCLUDE to get <errno.h> included or
* define LWIP_ERRNO_INCLUDE to <errno.h> or equivalent.
*/
#if defined __DOXYGEN__
#define LWIP_PROVIDE_ERRNO
#endif
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_ARCH_H */

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/**
* @file
*
* AutoIP Automatic LinkLocal IP Configuration
*/
/*
*
* Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Dominik Spies <kontakt@dspies.de>
*
* This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
* with RFC 3927.
*
*/
#ifndef LWIP_HDR_AUTOIP_H
#define LWIP_HDR_AUTOIP_H
#include "lwip/opt.h"
#if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
#include "lwip/netif.h"
/* #include "lwip/udp.h" */
#include "lwip/etharp.h"
#ifdef __cplusplus
extern "C" {
#endif
/** AutoIP Timing */
#define AUTOIP_TMR_INTERVAL 100
#define AUTOIP_TICKS_PER_SECOND (1000 / AUTOIP_TMR_INTERVAL)
/** AutoIP state information per netif */
struct autoip
{
/** the currently selected, probed, announced or used LL IP-Address */
ip4_addr_t llipaddr;
/** current AutoIP state machine state */
u8_t state;
/** sent number of probes or announces, dependent on state */
u8_t sent_num;
/** ticks to wait, tick is AUTOIP_TMR_INTERVAL long */
u16_t ttw;
/** ticks until a conflict can be solved by defending */
u8_t lastconflict;
/** total number of probed/used Link Local IP-Addresses */
u8_t tried_llipaddr;
};
void autoip_set_struct(struct netif *netif, struct autoip *autoip);
/** Remove a struct autoip previously set to the netif using autoip_set_struct() */
#define autoip_remove_struct(netif) do { (netif)->autoip = NULL; } while (0)
err_t autoip_start(struct netif *netif);
err_t autoip_stop(struct netif *netif);
void autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr);
void autoip_tmr(void);
void autoip_network_changed(struct netif *netif);
u8_t autoip_supplied_address(const struct netif *netif);
/* for lwIP internal use by ip4.c */
u8_t autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr);
#define netif_autoip_data(netif) ((struct autoip*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP))
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV4 && LWIP_AUTOIP */
#endif /* LWIP_HDR_AUTOIP_H */

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/**
* @file
* Debug messages infrastructure
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_DEBUG_H
#define LWIP_HDR_DEBUG_H
#include "lwip/arch.h"
#include "lwip/opt.h"
/**
* @defgroup debugging_levels LWIP_DBG_MIN_LEVEL and LWIP_DBG_TYPES_ON values
* @ingroup lwip_opts_debugmsg
* @{
*/
/** @name Debug level (LWIP_DBG_MIN_LEVEL)
* @{
*/
/** Debug level: ALL messages*/
#define LWIP_DBG_LEVEL_ALL 0x00
/** Debug level: Warnings. bad checksums, dropped packets, ... */
#define LWIP_DBG_LEVEL_WARNING 0x01
/** Debug level: Serious. memory allocation failures, ... */
#define LWIP_DBG_LEVEL_SERIOUS 0x02
/** Debug level: Severe */
#define LWIP_DBG_LEVEL_SEVERE 0x03
/**
* @}
*/
#define LWIP_DBG_MASK_LEVEL 0x03
/* compatibility define only */
#define LWIP_DBG_LEVEL_OFF LWIP_DBG_LEVEL_ALL
/** @name Enable/disable debug messages completely (LWIP_DBG_TYPES_ON)
* @{
*/
/** flag for LWIP_DEBUGF to enable that debug message */
#define LWIP_DBG_ON 0x80U
/** flag for LWIP_DEBUGF to disable that debug message */
#define LWIP_DBG_OFF 0x00U
/**
* @}
*/
/** @name Debug message types (LWIP_DBG_TYPES_ON)
* @{
*/
/** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */
#define LWIP_DBG_TRACE 0x40U
/** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */
#define LWIP_DBG_STATE 0x20U
/** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */
#define LWIP_DBG_FRESH 0x10U
/** flag for LWIP_DEBUGF to halt after printing this debug message */
#define LWIP_DBG_HALT 0x08U
/**
* @}
*/
/**
* @}
*/
/**
* @defgroup lwip_assertions Assertion handling
* @ingroup lwip_opts_debug
* @{
*/
/**
* LWIP_NOASSERT: Disable LWIP_ASSERT checks:
* To disable assertions define LWIP_NOASSERT in arch/cc.h.
*/
#ifdef __DOXYGEN__
#define LWIP_NOASSERT
#undef LWIP_NOASSERT
#endif
/**
* @}
*/
#define LWIP_NOASSERT
#ifndef LWIP_NOASSERT
#define LWIP_ASSERT(message, assertion) do { if (!(assertion)) { \
LWIP_PLATFORM_ASSERT(message); }} while(0)
#else /* LWIP_NOASSERT */
#define LWIP_ASSERT(message, assertion)
#endif /* LWIP_NOASSERT */
#ifndef LWIP_ERROR
#ifndef LWIP_NOASSERT
#define LWIP_PLATFORM_ERROR(message) LWIP_PLATFORM_ASSERT(message)
#elif defined LWIP_DEBUG
#define LWIP_PLATFORM_ERROR(message) LWIP_PLATFORM_DIAG((message))
#else
#define LWIP_PLATFORM_ERROR(message)
#endif
/* if "expression" isn't true, then print "message" and execute "handler" expression */
#define LWIP_ERROR(message, expression, handler) do { if (!(expression)) { \
LWIP_PLATFORM_ERROR(message); handler;}} while(0)
#endif /* LWIP_ERROR */
/** Enable debug message printing, but only if debug message type is enabled
* AND is of correct type AND is at least LWIP_DBG_LEVEL.
*/
#ifdef __DOXYGEN__
#define LWIP_DEBUG
#undef LWIP_DEBUG
#endif
#define LWIP_DEBUG
#ifdef LWIP_DEBUG
#define LWIP_DEBUGF(debug, message) do { \
if ( \
((debug) & LWIP_DBG_ON) && \
((debug) & LWIP_DBG_TYPES_ON) && \
((s16_t)((debug) & LWIP_DBG_MASK_LEVEL) >= LWIP_DBG_MIN_LEVEL)) { \
LWIP_PLATFORM_DIAG(message); \
if ((debug) & LWIP_DBG_HALT) { \
while(1); \
} \
} \
} while(0)
#else /* LWIP_DEBUG */
#define LWIP_DEBUGF(debug, message)
#endif /* LWIP_DEBUG */
#endif /* LWIP_HDR_DEBUG_H */

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/**
* @file
* various utility macros
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/**
* @defgroup perf Performance measurement
* @ingroup sys_layer
* All defines related to this section must not be placed in lwipopts.h,
* but in arch/perf.h!
* Measurement calls made throughout lwip, these can be defined to nothing.
* - PERF_START: start measuring something.
* - PERF_STOP(x): stop measuring something, and record the result.
*/
#ifndef LWIP_HDR_DEF_H
#define LWIP_HDR_DEF_H
/* arch.h might define NULL already */
#include "lwip/arch.h"
#include "lwip/opt.h"
#if LWIP_PERF
#include "arch/perf.h"
#else /* LWIP_PERF */
#define PERF_START /* null definition */
#define PERF_STOP(x) /* null definition */
#endif /* LWIP_PERF */
#ifdef __cplusplus
extern "C" {
#endif
#define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y))
#define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y))
/* Get the number of entries in an array ('x' must NOT be a pointer!) */
#define LWIP_ARRAYSIZE(x) (sizeof(x)/sizeof((x)[0]))
/** Create u32_t value from bytes */
#define LWIP_MAKEU32(a,b,c,d) (((u32_t)((a) & 0xff) << 24) | \
((u32_t)((b) & 0xff) << 16) | \
((u32_t)((c) & 0xff) << 8) | \
(u32_t)((d) & 0xff))
#ifndef NULL
#ifdef __cplusplus
#define NULL 0
#else
#define NULL ((void *)0)
#endif
#endif
#if BYTE_ORDER == BIG_ENDIAN
#define lwip_htons(x) ((u16_t)(x))
#define lwip_ntohs(x) ((u16_t)(x))
#define lwip_htonl(x) ((u32_t)(x))
#define lwip_ntohl(x) ((u32_t)(x))
#define PP_HTONS(x) ((u16_t)(x))
#define PP_NTOHS(x) ((u16_t)(x))
#define PP_HTONL(x) ((u32_t)(x))
#define PP_NTOHL(x) ((u32_t)(x))
#else /* BYTE_ORDER != BIG_ENDIAN */
#ifndef lwip_htons
u16_t lwip_htons(u16_t x);
#endif
#define lwip_ntohs(x) lwip_htons(x)
#ifndef lwip_htonl
u32_t lwip_htonl(u32_t x);
#endif
#define lwip_ntohl(x) lwip_htonl(x)
/* These macros should be calculated by the preprocessor and are used
with compile-time constants only (so that there is no little-endian
overhead at runtime). */
#define PP_HTONS(x) ((u16_t)((((x) & (u16_t)0x00ffU) << 8) | (((x) & (u16_t)0xff00U) >> 8)))
#define PP_NTOHS(x) PP_HTONS(x)
#define PP_HTONL(x) ((((x) & (u32_t)0x000000ffUL) << 24) | \
(((x) & (u32_t)0x0000ff00UL) << 8) | \
(((x) & (u32_t)0x00ff0000UL) >> 8) | \
(((x) & (u32_t)0xff000000UL) >> 24))
#define PP_NTOHL(x) PP_HTONL(x)
#endif /* BYTE_ORDER == BIG_ENDIAN */
/* Provide usual function names as macros for users, but this can be turned off */
#ifndef LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS
#define htons(x) lwip_htons(x)
#define ntohs(x) lwip_ntohs(x)
#define htonl(x) lwip_htonl(x)
#define ntohl(x) lwip_ntohl(x)
#endif
/* Functions that are not available as standard implementations.
* In cc.h, you can #define these to implementations available on
* your platform to save some code bytes if you use these functions
* in your application, too.
*/
#ifndef lwip_itoa
/* This can be #defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform */
void lwip_itoa(char* result, size_t bufsize, int number);
#endif
#ifndef lwip_strnicmp
/* This can be #defined to strnicmp() or strncasecmp() depending on your platform */
int lwip_strnicmp(const char* str1, const char* str2, size_t len);
#endif
#ifndef lwip_stricmp
/* This can be #defined to stricmp() or strcasecmp() depending on your platform */
int lwip_stricmp(const char* str1, const char* str2);
#endif
#ifndef lwip_strnstr
/* This can be #defined to strnstr() depending on your platform */
char* lwip_strnstr(const char* buffer, const char* token, size_t n);
#endif
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_DEF_H */

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/**
* @file
* DHCP client API
*/
/*
* Copyright (c) 2001-2004 Leon Woestenberg <leon.woestenberg@gmx.net>
* Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Leon Woestenberg <leon.woestenberg@gmx.net>
*
*/
#ifndef LWIP_HDR_DHCP_H
#define LWIP_HDR_DHCP_H
#include "lwip/opt.h"
#if LWIP_DHCP /* don't build if not configured for use in lwipopts.h */
#include "lwip/netif.h"
#include "lwip/udp.h"
#ifdef __cplusplus
extern "C" {
#endif
/** period (in seconds) of the application calling dhcp_coarse_tmr() */
#define DHCP_COARSE_TIMER_SECS 60
/** period (in milliseconds) of the application calling dhcp_coarse_tmr() */
#define DHCP_COARSE_TIMER_MSECS (DHCP_COARSE_TIMER_SECS * 1000UL)
/** period (in milliseconds) of the application calling dhcp_fine_tmr() */
#define DHCP_FINE_TIMER_MSECS 500
#define DHCP_BOOT_FILE_LEN 128U
/* AutoIP cooperation flags (struct dhcp.autoip_coop_state) */
typedef enum {
DHCP_AUTOIP_COOP_STATE_OFF = 0,
DHCP_AUTOIP_COOP_STATE_ON = 1
} dhcp_autoip_coop_state_enum_t;
struct dhcp
{
/** transaction identifier of last sent request */
u32_t xid;
/** track PCB allocation state */
u8_t pcb_allocated;
/** current DHCP state machine state */
u8_t state;
/** retries of current request */
u8_t tries;
#if LWIP_DHCP_AUTOIP_COOP
u8_t autoip_coop_state;
#endif
u8_t subnet_mask_given;
u16_t request_timeout; /* #ticks with period DHCP_FINE_TIMER_SECS for request timeout */
u16_t t1_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for renewal time */
u16_t t2_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for rebind time */
u16_t t1_renew_time; /* #ticks with period DHCP_COARSE_TIMER_SECS until next renew try */
u16_t t2_rebind_time; /* #ticks with period DHCP_COARSE_TIMER_SECS until next rebind try */
u16_t lease_used; /* #ticks with period DHCP_COARSE_TIMER_SECS since last received DHCP ack */
u16_t t0_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for lease time */
ip_addr_t server_ip_addr; /* dhcp server address that offered this lease (ip_addr_t because passed to UDP) */
ip4_addr_t offered_ip_addr;
ip4_addr_t offered_sn_mask;
ip4_addr_t offered_gw_addr;
u32_t offered_t0_lease; /* lease period (in seconds) */
u32_t offered_t1_renew; /* recommended renew time (usually 50% of lease period) */
u32_t offered_t2_rebind; /* recommended rebind time (usually 87.5 of lease period) */
#if LWIP_DHCP_BOOTP_FILE
ip4_addr_t offered_si_addr;
char boot_file_name[DHCP_BOOT_FILE_LEN];
#endif /* LWIP_DHCP_BOOTPFILE */
};
void dhcp_set_struct(struct netif *netif, struct dhcp *dhcp);
/** Remove a struct dhcp previously set to the netif using dhcp_set_struct() */
#define dhcp_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, NULL)
void dhcp_cleanup(struct netif *netif);
err_t dhcp_start(struct netif *netif);
err_t dhcp_renew(struct netif *netif);
err_t dhcp_release(struct netif *netif);
void dhcp_stop(struct netif *netif);
void dhcp_release_and_stop(struct netif *netif);
void dhcp_inform(struct netif *netif);
void dhcp_network_changed(struct netif *netif);
#if DHCP_DOES_ARP_CHECK
void dhcp_arp_reply(struct netif *netif, const ip4_addr_t *addr);
#endif
u8_t dhcp_supplied_address(const struct netif *netif);
/* to be called every minute */
void dhcp_coarse_tmr(void);
/* to be called every half second */
void dhcp_fine_tmr(void);
#if LWIP_DHCP_GET_NTP_SRV
/** This function must exist, in other to add offered NTP servers to
* the NTP (or SNTP) engine.
* See LWIP_DHCP_MAX_NTP_SERVERS */
extern void dhcp_set_ntp_servers(u8_t num_ntp_servers, const ip4_addr_t* ntp_server_addrs);
#endif /* LWIP_DHCP_GET_NTP_SRV */
#define netif_dhcp_data(netif) ((struct dhcp*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP))
#ifdef __cplusplus
}
#endif
#endif /* LWIP_DHCP */
#endif /*LWIP_HDR_DHCP_H*/

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/**
* @file
*
* DHCPv6 client: IPv6 address autoconfiguration as per
* RFC 3315 (stateful DHCPv6) and
* RFC 3736 (stateless DHCPv6).
*/
/*
* Copyright (c) 2018 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*/
#ifndef LWIP_HDR_IP6_DHCP6_H
#define LWIP_HDR_IP6_DHCP6_H
#include "lwip/opt.h"
#if LWIP_IPV6_DHCP6 /* don't build if not configured for use in lwipopts.h */
#include "lwip/err.h"
#include "lwip/netif.h"
#ifdef __cplusplus
extern "C" {
#endif
/** period (in milliseconds) of the application calling dhcp6_tmr() */
#define DHCP6_TIMER_MSECS 500
struct dhcp6
{
/** transaction identifier of last sent request */
u32_t xid;
/** track PCB allocation state */
u8_t pcb_allocated;
/** current DHCPv6 state machine state */
u8_t state;
/** retries of current request */
u8_t tries;
/** if request config is triggered while another action is active, this keeps track of it */
u8_t request_config_pending;
/** #ticks with period DHCP6_TIMER_MSECS for request timeout */
u16_t request_timeout;
#if LWIP_IPV6_DHCP6_STATEFUL
/* @todo: add more members here to keep track of stateful DHCPv6 data, like lease times */
#endif /* LWIP_IPV6_DHCP6_STATEFUL */
};
void dhcp6_set_struct(struct netif *netif, struct dhcp6 *dhcp6);
/** Remove a struct dhcp6 previously set to the netif using dhcp6_set_struct() */
#define dhcp6_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL)
void dhcp6_cleanup(struct netif *netif);
err_t dhcp6_enable_stateful(struct netif *netif);
err_t dhcp6_enable_stateless(struct netif *netif);
void dhcp6_disable(struct netif *netif);
void dhcp6_tmr(void);
void dhcp6_nd6_ra_trigger(struct netif *netif, u8_t managed_addr_config, u8_t other_config);
#if LWIP_DHCP6_GET_NTP_SRV
/** This function must exist, in other to add offered NTP servers to
* the NTP (or SNTP) engine.
* See LWIP_DHCP6_MAX_NTP_SERVERS */
extern void dhcp6_set_ntp_servers(u8_t num_ntp_servers, const ip_addr_t* ntp_server_addrs);
#endif /* LWIP_DHCP6_GET_NTP_SRV */
#define netif_dhcp6_data(netif) ((struct dhcp6*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6))
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV6_DHCP6 */
#endif /* LWIP_HDR_IP6_DHCP6_H */

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/**
* @file
* DNS API
*/
/**
* lwip DNS resolver header file.
* Author: Jim Pettinato
* April 2007
* ported from uIP resolv.c Copyright (c) 2002-2003, Adam Dunkels.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef LWIP_HDR_DNS_H
#define LWIP_HDR_DNS_H
#include "lwip/opt.h"
#if LWIP_DNS
#include "lwip/ip_addr.h"
#include "lwip/err.h"
#ifdef __cplusplus
extern "C" {
#endif
/** DNS timer period */
#define DNS_TMR_INTERVAL 1000
/* DNS resolve types: */
#define LWIP_DNS_ADDRTYPE_IPV4 0
#define LWIP_DNS_ADDRTYPE_IPV6 1
#define LWIP_DNS_ADDRTYPE_IPV4_IPV6 2 /* try to resolve IPv4 first, try IPv6 if IPv4 fails only */
#define LWIP_DNS_ADDRTYPE_IPV6_IPV4 3 /* try to resolve IPv6 first, try IPv4 if IPv6 fails only */
#if LWIP_IPV4 && LWIP_IPV6
#ifndef LWIP_DNS_ADDRTYPE_DEFAULT
#define LWIP_DNS_ADDRTYPE_DEFAULT LWIP_DNS_ADDRTYPE_IPV4_IPV6
#endif
#elif LWIP_IPV4
#define LWIP_DNS_ADDRTYPE_DEFAULT LWIP_DNS_ADDRTYPE_IPV4
#else
#define LWIP_DNS_ADDRTYPE_DEFAULT LWIP_DNS_ADDRTYPE_IPV6
#endif
#if DNS_LOCAL_HOSTLIST
/** struct used for local host-list */
struct local_hostlist_entry {
/** static hostname */
const char *name;
/** static host address in network byteorder */
ip_addr_t addr;
struct local_hostlist_entry *next;
};
#define DNS_LOCAL_HOSTLIST_ELEM(name, addr_init) {name, addr_init, NULL}
#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
#ifndef DNS_LOCAL_HOSTLIST_MAX_NAMELEN
#define DNS_LOCAL_HOSTLIST_MAX_NAMELEN DNS_MAX_NAME_LENGTH
#endif
#define LOCALHOSTLIST_ELEM_SIZE ((sizeof(struct local_hostlist_entry) + DNS_LOCAL_HOSTLIST_MAX_NAMELEN + 1))
#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
#endif /* DNS_LOCAL_HOSTLIST */
#if LWIP_IPV4
extern const ip_addr_t dns_mquery_v4group;
#endif /* LWIP_IPV4 */
#if LWIP_IPV6
extern const ip_addr_t dns_mquery_v6group;
#endif /* LWIP_IPV6 */
/** Callback which is invoked when a hostname is found.
* A function of this type must be implemented by the application using the DNS resolver.
* @param name pointer to the name that was looked up.
* @param ipaddr pointer to an ip_addr_t containing the IP address of the hostname,
* or NULL if the name could not be found (or on any other error).
* @param callback_arg a user-specified callback argument passed to dns_gethostbyname
*/
typedef void (*dns_found_callback)(const char *name, const ip_addr_t *ipaddr, void *callback_arg);
void dns_init(void);
void dns_tmr(void);
void dns_setserver(u8_t numdns, const ip_addr_t *dnsserver);
const ip_addr_t* dns_getserver(u8_t numdns);
err_t dns_gethostbyname(const char *hostname, ip_addr_t *addr,
dns_found_callback found, void *callback_arg);
err_t dns_gethostbyname_addrtype(const char *hostname, ip_addr_t *addr,
dns_found_callback found, void *callback_arg,
u8_t dns_addrtype);
#if DNS_LOCAL_HOSTLIST
size_t dns_local_iterate(dns_found_callback iterator_fn, void *iterator_arg);
err_t dns_local_lookup(const char *hostname, ip_addr_t *addr, u8_t dns_addrtype);
#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
int dns_local_removehost(const char *hostname, const ip_addr_t *addr);
err_t dns_local_addhost(const char *hostname, const ip_addr_t *addr);
#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
#endif /* DNS_LOCAL_HOSTLIST */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_DNS */
#endif /* LWIP_HDR_DNS_H */

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/**
* @file
* lwIP Error codes
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_ERR_H
#define LWIP_HDR_ERR_H
#include "lwip/opt.h"
#include "lwip/arch.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup infrastructure_errors Error codes
* @ingroup infrastructure
* @{
*/
/** Definitions for error constants. */
typedef enum {
/** No error, everything OK. */
ERR_OK = 0,
/** Out of memory error. */
ERR_MEM = -1,
/** Buffer error. */
ERR_BUF = -2,
/** Timeout. */
ERR_TIMEOUT = -3,
/** Routing problem. */
ERR_RTE = -4,
/** Operation in progress */
ERR_INPROGRESS = -5,
/** Illegal value. */
ERR_VAL = -6,
/** Operation would block. */
ERR_WOULDBLOCK = -7,
/** Address in use. */
ERR_USE = -8,
/** Already connecting. */
ERR_ALREADY = -9,
/** Conn already established.*/
ERR_ISCONN = -10,
/** Not connected. */
ERR_CONN = -11,
/** Low-level netif error */
ERR_IF = -12,
/** Connection aborted. */
ERR_ABRT = -13,
/** Connection reset. */
ERR_RST = -14,
/** Connection closed. */
ERR_CLSD = -15,
/** Illegal argument. */
ERR_ARG = -16
} err_enum_t;
/** Define LWIP_ERR_T in cc.h if you want to use
* a different type for your platform (must be signed). */
#ifdef LWIP_ERR_T
typedef LWIP_ERR_T err_t;
#else /* LWIP_ERR_T */
typedef s8_t err_t;
#endif /* LWIP_ERR_T*/
/**
* @}
*/
#ifdef LWIP_DEBUG
extern const char *lwip_strerr(err_t err);
#else
#define lwip_strerr(x) ""
#endif /* LWIP_DEBUG */
#if !NO_SYS
int err_to_errno(err_t err);
#endif /* !NO_SYS */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_ERR_H */

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/**
* @file
* Posix Errno defines
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_ERRNO_H
#define LWIP_HDR_ERRNO_H
#include "lwip/opt.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef LWIP_PROVIDE_ERRNO
#define EPERM 1 /* Operation not permitted */
#define ENOENT 2 /* No such file or directory */
#define ESRCH 3 /* No such process */
#define EINTR 4 /* Interrupted system call */
#define EIO 5 /* I/O error */
#define ENXIO 6 /* No such device or address */
#define E2BIG 7 /* Arg list too long */
#define ENOEXEC 8 /* Exec format error */
#define EBADF 9 /* Bad file number */
#define ECHILD 10 /* No child processes */
#define EAGAIN 11 /* Try again */
#define ENOMEM 12 /* Out of memory */
#define EACCES 13 /* Permission denied */
#define EFAULT 14 /* Bad address */
#define ENOTBLK 15 /* Block device required */
#define EBUSY 16 /* Device or resource busy */
#define EEXIST 17 /* File exists */
#define EXDEV 18 /* Cross-device link */
#define ENODEV 19 /* No such device */
#define ENOTDIR 20 /* Not a directory */
#define EISDIR 21 /* Is a directory */
#define EINVAL 22 /* Invalid argument */
#define ENFILE 23 /* File table overflow */
#define EMFILE 24 /* Too many open files */
#define ENOTTY 25 /* Not a typewriter */
#define ETXTBSY 26 /* Text file busy */
#define EFBIG 27 /* File too large */
#define ENOSPC 28 /* No space left on device */
#define ESPIPE 29 /* Illegal seek */
#define EROFS 30 /* Read-only file system */
#define EMLINK 31 /* Too many links */
#define EPIPE 32 /* Broken pipe */
#define EDOM 33 /* Math argument out of domain of func */
#define ERANGE 34 /* Math result not representable */
#define EDEADLK 35 /* Resource deadlock would occur */
#define ENAMETOOLONG 36 /* File name too long */
#define ENOLCK 37 /* No record locks available */
#define ENOSYS 38 /* Function not implemented */
#define ENOTEMPTY 39 /* Directory not empty */
#define ELOOP 40 /* Too many symbolic links encountered */
#define EWOULDBLOCK EAGAIN /* Operation would block */
#define ENOMSG 42 /* No message of desired type */
#define EIDRM 43 /* Identifier removed */
#define ECHRNG 44 /* Channel number out of range */
#define EL2NSYNC 45 /* Level 2 not synchronized */
#define EL3HLT 46 /* Level 3 halted */
#define EL3RST 47 /* Level 3 reset */
#define ELNRNG 48 /* Link number out of range */
#define EUNATCH 49 /* Protocol driver not attached */
#define ENOCSI 50 /* No CSI structure available */
#define EL2HLT 51 /* Level 2 halted */
#define EBADE 52 /* Invalid exchange */
#define EBADR 53 /* Invalid request descriptor */
#define EXFULL 54 /* Exchange full */
#define ENOANO 55 /* No anode */
#define EBADRQC 56 /* Invalid request code */
#define EBADSLT 57 /* Invalid slot */
#define EDEADLOCK EDEADLK
#define EBFONT 59 /* Bad font file format */
#define ENOSTR 60 /* Device not a stream */
#define ENODATA 61 /* No data available */
#define ETIME 62 /* Timer expired */
#define ENOSR 63 /* Out of streams resources */
#define ENONET 64 /* Machine is not on the network */
#define ENOPKG 65 /* Package not installed */
#define EREMOTE 66 /* Object is remote */
#define ENOLINK 67 /* Link has been severed */
#define EADV 68 /* Advertise error */
#define ESRMNT 69 /* Srmount error */
#define ECOMM 70 /* Communication error on send */
#define EPROTO 71 /* Protocol error */
#define EMULTIHOP 72 /* Multihop attempted */
#define EDOTDOT 73 /* RFS specific error */
#define EBADMSG 74 /* Not a data message */
#define EOVERFLOW 75 /* Value too large for defined data type */
#define ENOTUNIQ 76 /* Name not unique on network */
#define EBADFD 77 /* File descriptor in bad state */
#define EREMCHG 78 /* Remote address changed */
#define ELIBACC 79 /* Can not access a needed shared library */
#define ELIBBAD 80 /* Accessing a corrupted shared library */
#define ELIBSCN 81 /* .lib section in a.out corrupted */
#define ELIBMAX 82 /* Attempting to link in too many shared libraries */
#define ELIBEXEC 83 /* Cannot exec a shared library directly */
#define EILSEQ 84 /* Illegal byte sequence */
#define ERESTART 85 /* Interrupted system call should be restarted */
#define ESTRPIPE 86 /* Streams pipe error */
#define EUSERS 87 /* Too many users */
#define ENOTSOCK 88 /* Socket operation on non-socket */
#define EDESTADDRREQ 89 /* Destination address required */
#define EMSGSIZE 90 /* Message too long */
#define EPROTOTYPE 91 /* Protocol wrong type for socket */
#define ENOPROTOOPT 92 /* Protocol not available */
#define EPROTONOSUPPORT 93 /* Protocol not supported */
#define ESOCKTNOSUPPORT 94 /* Socket type not supported */
#define EOPNOTSUPP 95 /* Operation not supported on transport endpoint */
#define EPFNOSUPPORT 96 /* Protocol family not supported */
#define EAFNOSUPPORT 97 /* Address family not supported by protocol */
#define EADDRINUSE 98 /* Address already in use */
#define EADDRNOTAVAIL 99 /* Cannot assign requested address */
#define ENETDOWN 100 /* Network is down */
#define ENETUNREACH 101 /* Network is unreachable */
#define ENETRESET 102 /* Network dropped connection because of reset */
#define ECONNABORTED 103 /* Software caused connection abort */
#define ECONNRESET 104 /* Connection reset by peer */
#define ENOBUFS 105 /* No buffer space available */
#define EISCONN 106 /* Transport endpoint is already connected */
#define ENOTCONN 107 /* Transport endpoint is not connected */
#define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */
#define ETOOMANYREFS 109 /* Too many references: cannot splice */
#define ETIMEDOUT 110 /* Connection timed out */
#define ECONNREFUSED 111 /* Connection refused */
#define EHOSTDOWN 112 /* Host is down */
#define EHOSTUNREACH 113 /* No route to host */
#define EALREADY 114 /* Operation already in progress */
#define EINPROGRESS 115 /* Operation now in progress */
#define ESTALE 116 /* Stale NFS file handle */
#define EUCLEAN 117 /* Structure needs cleaning */
#define ENOTNAM 118 /* Not a XENIX named type file */
#define ENAVAIL 119 /* No XENIX semaphores available */
#define EISNAM 120 /* Is a named type file */
#define EREMOTEIO 121 /* Remote I/O error */
#define EDQUOT 122 /* Quota exceeded */
#define ENOMEDIUM 123 /* No medium found */
#define EMEDIUMTYPE 124 /* Wrong medium type */
#ifndef errno
extern int errno;
#endif
#else /* LWIP_PROVIDE_ERRNO */
/* Define LWIP_ERRNO_STDINCLUDE if you want to include <errno.h> here */
#ifdef LWIP_ERRNO_STDINCLUDE
#include <errno.h>
#else /* LWIP_ERRNO_STDINCLUDE */
/* Define LWIP_ERRNO_INCLUDE to an equivalent of <errno.h> to include the error defines here */
#ifdef LWIP_ERRNO_INCLUDE
#include LWIP_ERRNO_INCLUDE
#endif /* LWIP_ERRNO_INCLUDE */
#endif /* LWIP_ERRNO_STDINCLUDE */
#endif /* LWIP_PROVIDE_ERRNO */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_ERRNO_H */

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/**
* @file
* Ethernet output function - handles OUTGOING ethernet level traffic, implements
* ARP resolving.
* To be used in most low-level netif implementations
*/
/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv>
* Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_NETIF_ETHARP_H
#define LWIP_HDR_NETIF_ETHARP_H
#include "lwip/opt.h"
#if LWIP_ARP || LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */
#include "lwip/pbuf.h"
#include "lwip/ip4_addr.h"
#include "lwip/netif.h"
#include "lwip/ip4.h"
#include "lwip/prot/ethernet.h"
#if LWIP_IPV4 && LWIP_ARP /* don't build if not configured for use in lwipopts.h */
#include "lwip/prot/etharp.h"
#ifdef __cplusplus
extern "C" {
#endif
/** 1 seconds period */
#define ARP_TMR_INTERVAL 1000
#if ARP_QUEUEING
/** struct for queueing outgoing packets for unknown address
* defined here to be accessed by memp.h
*/
struct etharp_q_entry {
struct etharp_q_entry *next;
struct pbuf *p;
};
#endif /* ARP_QUEUEING */
#define etharp_init() /* Compatibility define, no init needed. */
void etharp_tmr(void);
ssize_t etharp_find_addr(struct netif *netif, const ip4_addr_t *ipaddr,
struct eth_addr **eth_ret, const ip4_addr_t **ip_ret);
int etharp_get_entry(size_t i, ip4_addr_t **ipaddr, struct netif **netif, struct eth_addr **eth_ret);
err_t etharp_output(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr);
err_t etharp_query(struct netif *netif, const ip4_addr_t *ipaddr, struct pbuf *q);
err_t etharp_request(struct netif *netif, const ip4_addr_t *ipaddr);
/** For Ethernet network interfaces, we might want to send "gratuitous ARP";
* this is an ARP packet sent by a node in order to spontaneously cause other
* nodes to update an entry in their ARP cache.
* From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */
#define etharp_gratuitous(netif) etharp_request((netif), netif_ip4_addr(netif))
void etharp_cleanup_netif(struct netif *netif);
#if ETHARP_SUPPORT_STATIC_ENTRIES
err_t etharp_add_static_entry(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr);
err_t etharp_remove_static_entry(const ip4_addr_t *ipaddr);
#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
void etharp_input(struct pbuf *p, struct netif *netif);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV4 && LWIP_ARP */
#endif /* LWIP_ARP || LWIP_ETHERNET */
#endif /* LWIP_HDR_NETIF_ETHARP_H */

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/**
* @file
*
* Ethernet output for IPv6. Uses ND tables for link-layer addressing.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Ivan Delamer <delamer@inicotech.com>
*
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
#ifndef LWIP_HDR_ETHIP6_H
#define LWIP_HDR_ETHIP6_H
#include "lwip/opt.h"
#if LWIP_IPV6 && LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */
#include "lwip/pbuf.h"
#include "lwip/ip6.h"
#include "lwip/ip6_addr.h"
#include "lwip/netif.h"
#ifdef __cplusplus
extern "C" {
#endif
err_t ethip6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV6 && LWIP_ETHERNET */
#endif /* LWIP_HDR_ETHIP6_H */

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/**
* @file
* ICMP API
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_ICMP_H
#define LWIP_HDR_ICMP_H
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/prot/icmp.h"
#if LWIP_IPV6 && LWIP_ICMP6
#include "lwip/icmp6.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/** ICMP destination unreachable codes */
enum icmp_dur_type {
/** net unreachable */
ICMP_DUR_NET = 0,
/** host unreachable */
ICMP_DUR_HOST = 1,
/** protocol unreachable */
ICMP_DUR_PROTO = 2,
/** port unreachable */
ICMP_DUR_PORT = 3,
/** fragmentation needed and DF set */
ICMP_DUR_FRAG = 4,
/** source route failed */
ICMP_DUR_SR = 5
};
/** ICMP time exceeded codes */
enum icmp_te_type {
/** time to live exceeded in transit */
ICMP_TE_TTL = 0,
/** fragment reassembly time exceeded */
ICMP_TE_FRAG = 1
};
#if LWIP_IPV4 && LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
void icmp_input(struct pbuf *p, struct netif *inp);
void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
#endif /* LWIP_IPV4 && LWIP_ICMP */
#if LWIP_IPV4 && LWIP_IPV6
#if LWIP_ICMP && LWIP_ICMP6
#define icmp_port_unreach(isipv6, pbuf) ((isipv6) ? \
icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT) : \
icmp_dest_unreach(pbuf, ICMP_DUR_PORT))
#elif LWIP_ICMP
#define icmp_port_unreach(isipv6, pbuf) do{ if(!(isipv6)) { icmp_dest_unreach(pbuf, ICMP_DUR_PORT);}}while(0)
#elif LWIP_ICMP6
#define icmp_port_unreach(isipv6, pbuf) do{ if(isipv6) { icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT);}}while(0)
#else
#define icmp_port_unreach(isipv6, pbuf)
#endif
#elif LWIP_IPV6 && LWIP_ICMP6
#define icmp_port_unreach(isipv6, pbuf) icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT)
#elif LWIP_IPV4 && LWIP_ICMP
#define icmp_port_unreach(isipv6, pbuf) icmp_dest_unreach(pbuf, ICMP_DUR_PORT)
#else /* (LWIP_IPV6 && LWIP_ICMP6) || (LWIP_IPV4 && LWIP_ICMP) */
#define icmp_port_unreach(isipv6, pbuf)
#endif /* (LWIP_IPV6 && LWIP_ICMP6) || (LWIP_IPV4 && LWIP_ICMP) LWIP_IPV4*/
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_ICMP_H */

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/**
* @file
*
* IPv6 version of ICMP, as per RFC 4443.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Ivan Delamer <delamer@inicotech.com>
*
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
#ifndef LWIP_HDR_ICMP6_H
#define LWIP_HDR_ICMP6_H
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/ip6_addr.h"
#include "lwip/netif.h"
#include "lwip/prot/icmp6.h"
#ifdef __cplusplus
extern "C" {
#endif
#if LWIP_ICMP6 && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
void icmp6_input(struct pbuf *p, struct netif *inp);
void icmp6_dest_unreach(struct pbuf *p, enum icmp6_dur_code c);
void icmp6_packet_too_big(struct pbuf *p, u32_t mtu);
void icmp6_time_exceeded(struct pbuf *p, enum icmp6_te_code c);
void icmp6_time_exceeded_with_addrs(struct pbuf *p, enum icmp6_te_code c,
const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr);
void icmp6_param_problem(struct pbuf *p, enum icmp6_pp_code c, const void *pointer);
#endif /* LWIP_ICMP6 && LWIP_IPV6 */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_ICMP6_H */

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/**
* @file
* Interface Identification APIs from:
* RFC 3493: Basic Socket Interface Extensions for IPv6
* Section 4: Interface Identification
*/
/*
* Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. <joel.cunningham@garmin.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Joel Cunningham <joel.cunningham@me.com>
*
*/
#ifndef LWIP_HDR_IF_H
#define LWIP_HDR_IF_H
#include "lwip/opt.h"
#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
#include "lwip/netif.h"
#ifdef __cplusplus
extern "C" {
#endif
#define IF_NAMESIZE NETIF_NAMESIZE
char * lwip_if_indextoname(unsigned int ifindex, char *ifname);
unsigned int lwip_if_nametoindex(const char *ifname);
#if LWIP_COMPAT_SOCKETS
#define if_indextoname(ifindex, ifname) lwip_if_indextoname(ifindex,ifname)
#define if_nametoindex(ifname) lwip_if_nametoindex(ifname)
#endif /* LWIP_COMPAT_SOCKETS */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_SOCKET */
#endif /* LWIP_HDR_IF_H */

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/**
* @file
* IGMP API
*/
/*
* Copyright (c) 2002 CITEL Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is a contribution to the lwIP TCP/IP stack.
* The Swedish Institute of Computer Science and Adam Dunkels
* are specifically granted permission to redistribute this
* source code.
*/
#ifndef LWIP_HDR_IGMP_H
#define LWIP_HDR_IGMP_H
#include "lwip/opt.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/pbuf.h"
#if LWIP_IPV4 && LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
#ifdef __cplusplus
extern "C" {
#endif
/* IGMP timer */
#define IGMP_TMR_INTERVAL 100 /* Milliseconds */
#define IGMP_V1_DELAYING_MEMBER_TMR (1000/IGMP_TMR_INTERVAL)
#define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL)
/* Compatibility defines (don't use for new code) */
#define IGMP_DEL_MAC_FILTER NETIF_DEL_MAC_FILTER
#define IGMP_ADD_MAC_FILTER NETIF_ADD_MAC_FILTER
/**
* igmp group structure - there is
* a list of groups for each interface
* these should really be linked from the interface, but
* if we keep them separate we will not affect the lwip original code
* too much
*
* There will be a group for the all systems group address but this
* will not run the state machine as it is used to kick off reports
* from all the other groups
*/
struct igmp_group {
/** next link */
struct igmp_group *next;
/** multicast address */
ip4_addr_t group_address;
/** signifies we were the last person to report */
u8_t last_reporter_flag;
/** current state of the group */
u8_t group_state;
/** timer for reporting, negative is OFF */
u16_t timer;
/** counter of simultaneous uses */
u8_t use;
};
/* Prototypes */
void igmp_init(void);
err_t igmp_start(struct netif *netif);
err_t igmp_stop(struct netif *netif);
void igmp_report_groups(struct netif *netif);
struct igmp_group *igmp_lookfor_group(struct netif *ifp, const ip4_addr_t *addr);
void igmp_input(struct pbuf *p, struct netif *inp, const ip4_addr_t *dest);
err_t igmp_joingroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr);
err_t igmp_joingroup_netif(struct netif *netif, const ip4_addr_t *groupaddr);
err_t igmp_leavegroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr);
err_t igmp_leavegroup_netif(struct netif *netif, const ip4_addr_t *groupaddr);
void igmp_tmr(void);
/** @ingroup igmp
* Get list head of IGMP groups for netif.
* Note: The allsystems group IP is contained in the list as first entry.
* @see @ref netif_set_igmp_mac_filter()
*/
#define netif_igmp_data(netif) ((struct igmp_group *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_IGMP))
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV4 && LWIP_IGMP */
#endif /* LWIP_HDR_IGMP_H */

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/**
* @file
* This file (together with sockets.h) aims to provide structs and functions from
* - arpa/inet.h
* - netinet/in.h
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_INET_H
#define LWIP_HDR_INET_H
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/ip_addr.h"
#include "lwip/ip6_addr.h"
#ifdef __cplusplus
extern "C" {
#endif
/* If your port already typedef's in_addr_t, define IN_ADDR_T_DEFINED
to prevent this code from redefining it. */
#if !defined(in_addr_t) && !defined(IN_ADDR_T_DEFINED)
typedef u32_t in_addr_t;
#endif
struct in_addr {
in_addr_t s_addr;
};
struct in6_addr {
union {
u32_t u32_addr[4];
u8_t u8_addr[16];
} un;
#define s6_addr un.u8_addr
};
/** 255.255.255.255 */
#define INADDR_NONE IPADDR_NONE
/** 127.0.0.1 */
#define INADDR_LOOPBACK IPADDR_LOOPBACK
/** 0.0.0.0 */
#define INADDR_ANY IPADDR_ANY
/** 255.255.255.255 */
#define INADDR_BROADCAST IPADDR_BROADCAST
/** This macro can be used to initialize a variable of type struct in6_addr
to the IPv6 wildcard address. */
#define IN6ADDR_ANY_INIT {{{0,0,0,0}}}
/** This macro can be used to initialize a variable of type struct in6_addr
to the IPv6 loopback address. */
#define IN6ADDR_LOOPBACK_INIT {{{0,0,0,PP_HTONL(1)}}}
/** This variable is initialized by the system to contain the wildcard IPv6 address. */
extern const struct in6_addr in6addr_any;
/* Definitions of the bits in an (IPv4) Internet address integer.
On subnets, host and network parts are found according to
the subnet mask, not these masks. */
#define IN_CLASSA(a) IP_CLASSA(a)
#define IN_CLASSA_NET IP_CLASSA_NET
#define IN_CLASSA_NSHIFT IP_CLASSA_NSHIFT
#define IN_CLASSA_HOST IP_CLASSA_HOST
#define IN_CLASSA_MAX IP_CLASSA_MAX
#define IN_CLASSB(b) IP_CLASSB(b)
#define IN_CLASSB_NET IP_CLASSB_NET
#define IN_CLASSB_NSHIFT IP_CLASSB_NSHIFT
#define IN_CLASSB_HOST IP_CLASSB_HOST
#define IN_CLASSB_MAX IP_CLASSB_MAX
#define IN_CLASSC(c) IP_CLASSC(c)
#define IN_CLASSC_NET IP_CLASSC_NET
#define IN_CLASSC_NSHIFT IP_CLASSC_NSHIFT
#define IN_CLASSC_HOST IP_CLASSC_HOST
#define IN_CLASSC_MAX IP_CLASSC_MAX
#define IN_CLASSD(d) IP_CLASSD(d)
#define IN_CLASSD_NET IP_CLASSD_NET /* These ones aren't really */
#define IN_CLASSD_NSHIFT IP_CLASSD_NSHIFT /* net and host fields, but */
#define IN_CLASSD_HOST IP_CLASSD_HOST /* routing needn't know. */
#define IN_CLASSD_MAX IP_CLASSD_MAX
#define IN_MULTICAST(a) IP_MULTICAST(a)
#define IN_EXPERIMENTAL(a) IP_EXPERIMENTAL(a)
#define IN_BADCLASS(a) IP_BADCLASS(a)
#define IN_LOOPBACKNET IP_LOOPBACKNET
#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN IP4ADDR_STRLEN_MAX
#endif
#if LWIP_IPV6
#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN IP6ADDR_STRLEN_MAX
#endif
#endif
#if LWIP_IPV4
#define inet_addr_from_ip4addr(target_inaddr, source_ipaddr) ((target_inaddr)->s_addr = ip4_addr_get_u32(source_ipaddr))
#define inet_addr_to_ip4addr(target_ipaddr, source_inaddr) (ip4_addr_set_u32(target_ipaddr, (source_inaddr)->s_addr))
/* directly map this to the lwip internal functions */
#define inet_addr(cp) ipaddr_addr(cp)
#define inet_aton(cp, addr) ip4addr_aton(cp, (ip4_addr_t*)addr)
#define inet_ntoa(addr) ip4addr_ntoa((const ip4_addr_t*)&(addr))
#define inet_ntoa_r(addr, buf, buflen) ip4addr_ntoa_r((const ip4_addr_t*)&(addr), buf, buflen)
#endif /* LWIP_IPV4 */
#if LWIP_IPV6
#define inet6_addr_from_ip6addr(target_in6addr, source_ip6addr) {(target_in6addr)->un.u32_addr[0] = (source_ip6addr)->addr[0]; \
(target_in6addr)->un.u32_addr[1] = (source_ip6addr)->addr[1]; \
(target_in6addr)->un.u32_addr[2] = (source_ip6addr)->addr[2]; \
(target_in6addr)->un.u32_addr[3] = (source_ip6addr)->addr[3];}
#define inet6_addr_to_ip6addr(target_ip6addr, source_in6addr) {(target_ip6addr)->addr[0] = (source_in6addr)->un.u32_addr[0]; \
(target_ip6addr)->addr[1] = (source_in6addr)->un.u32_addr[1]; \
(target_ip6addr)->addr[2] = (source_in6addr)->un.u32_addr[2]; \
(target_ip6addr)->addr[3] = (source_in6addr)->un.u32_addr[3]; \
ip6_addr_clear_zone(target_ip6addr);}
/* directly map this to the lwip internal functions */
#define inet6_aton(cp, addr) ip6addr_aton(cp, (ip6_addr_t*)addr)
#define inet6_ntoa(addr) ip6addr_ntoa((const ip6_addr_t*)&(addr))
#define inet6_ntoa_r(addr, buf, buflen) ip6addr_ntoa_r((const ip6_addr_t*)&(addr), buf, buflen)
#endif /* LWIP_IPV6 */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_INET_H */

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/**
* @file
* IP checksum calculation functions
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_INET_CHKSUM_H
#define LWIP_HDR_INET_CHKSUM_H
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"
/** Swap the bytes in an u16_t: much like lwip_htons() for little-endian */
#ifndef SWAP_BYTES_IN_WORD
#define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8)
#endif /* SWAP_BYTES_IN_WORD */
/** Split an u32_t in two u16_ts and add them up */
#ifndef FOLD_U32T
#define FOLD_U32T(u) ((u32_t)(((u) >> 16) + ((u) & 0x0000ffffUL)))
#endif
#if LWIP_CHECKSUM_ON_COPY
/** Function-like macro: same as MEMCPY but returns the checksum of copied data
as u16_t */
# ifndef LWIP_CHKSUM_COPY
# define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len)
# ifndef LWIP_CHKSUM_COPY_ALGORITHM
# define LWIP_CHKSUM_COPY_ALGORITHM 1
# endif /* LWIP_CHKSUM_COPY_ALGORITHM */
# else /* LWIP_CHKSUM_COPY */
# define LWIP_CHKSUM_COPY_ALGORITHM 0
# endif /* LWIP_CHKSUM_COPY */
#else /* LWIP_CHECKSUM_ON_COPY */
# define LWIP_CHKSUM_COPY_ALGORITHM 0
#endif /* LWIP_CHECKSUM_ON_COPY */
#ifdef __cplusplus
extern "C" {
#endif
u16_t inet_chksum(const void *dataptr, u16_t len);
u16_t inet_chksum_pbuf(struct pbuf *p);
#if LWIP_CHKSUM_COPY_ALGORITHM
u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len);
#endif /* LWIP_CHKSUM_COPY_ALGORITHM */
#if LWIP_IPV4
u16_t inet_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
const ip4_addr_t *src, const ip4_addr_t *dest);
u16_t inet_chksum_pseudo_partial(struct pbuf *p, u8_t proto,
u16_t proto_len, u16_t chksum_len, const ip4_addr_t *src, const ip4_addr_t *dest);
#endif /* LWIP_IPV4 */
#if LWIP_IPV6
u16_t ip6_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
const ip6_addr_t *src, const ip6_addr_t *dest);
u16_t ip6_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len,
u16_t chksum_len, const ip6_addr_t *src, const ip6_addr_t *dest);
#endif /* LWIP_IPV6 */
u16_t ip_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
const ip_addr_t *src, const ip_addr_t *dest);
u16_t ip_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len,
u16_t chksum_len, const ip_addr_t *src, const ip_addr_t *dest);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_INET_H */

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/**
* @file
* lwIP initialization API
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_INIT_H
#define LWIP_HDR_INIT_H
#include "lwip/opt.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup lwip_version Version
* @ingroup lwip
* @{
*/
/** X.x.x: Major version of the stack */
#define LWIP_VERSION_MAJOR 2
/** x.X.x: Minor version of the stack */
#define LWIP_VERSION_MINOR 1
/** x.x.X: Revision of the stack */
#define LWIP_VERSION_REVISION 2
/** For release candidates, this is set to 1..254
* For official releases, this is set to 255 (LWIP_RC_RELEASE)
* For development versions (Git), this is set to 0 (LWIP_RC_DEVELOPMENT) */
#define LWIP_VERSION_RC LWIP_RC_RELEASE
/** LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases */
#define LWIP_RC_RELEASE 255
/** LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for Git versions */
#define LWIP_RC_DEVELOPMENT 0
#define LWIP_VERSION_IS_RELEASE (LWIP_VERSION_RC == LWIP_RC_RELEASE)
#define LWIP_VERSION_IS_DEVELOPMENT (LWIP_VERSION_RC == LWIP_RC_DEVELOPMENT)
#define LWIP_VERSION_IS_RC ((LWIP_VERSION_RC != LWIP_RC_RELEASE) && (LWIP_VERSION_RC != LWIP_RC_DEVELOPMENT))
/* Some helper defines to get a version string */
#define LWIP_VERSTR2(x) #x
#define LWIP_VERSTR(x) LWIP_VERSTR2(x)
#if LWIP_VERSION_IS_RELEASE
#define LWIP_VERSION_STRING_SUFFIX ""
#elif LWIP_VERSION_IS_DEVELOPMENT
#define LWIP_VERSION_STRING_SUFFIX "d"
#else
#define LWIP_VERSION_STRING_SUFFIX "rc" LWIP_VERSTR(LWIP_VERSION_RC)
#endif
/** Provides the version of the stack */
#define LWIP_VERSION ((LWIP_VERSION_MAJOR) << 24 | (LWIP_VERSION_MINOR) << 16 | \
(LWIP_VERSION_REVISION) << 8 | (LWIP_VERSION_RC))
/** Provides the version of the stack as string */
#define LWIP_VERSION_STRING LWIP_VERSTR(LWIP_VERSION_MAJOR) "." LWIP_VERSTR(LWIP_VERSION_MINOR) "." LWIP_VERSTR(LWIP_VERSION_REVISION) LWIP_VERSION_STRING_SUFFIX
/**
* @}
*/
/* Modules initialization */
void lwip_init(void);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_INIT_H */

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/**
* @file
* lwIP initialization API
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_INIT_H
#define LWIP_HDR_INIT_H
#include "lwip/opt.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup lwip_version Version
* @ingroup lwip
* @{
*/
/** X.x.x: Major version of the stack */
#define LWIP_VERSION_MAJOR ${LWIP_VERSION_MAJOR}
/** x.X.x: Minor version of the stack */
#define LWIP_VERSION_MINOR ${LWIP_VERSION_MINOR}
/** x.x.X: Revision of the stack */
#define LWIP_VERSION_REVISION ${LWIP_VERSION_REVISION}
/** For release candidates, this is set to 1..254
* For official releases, this is set to 255 (LWIP_RC_RELEASE)
* For development versions (Git), this is set to 0 (LWIP_RC_DEVELOPMENT) */
#define LWIP_VERSION_RC ${LWIP_VERSION_RC}
/** LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases */
#define LWIP_RC_RELEASE 255
/** LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for Git versions */
#define LWIP_RC_DEVELOPMENT 0
#define LWIP_VERSION_IS_RELEASE (LWIP_VERSION_RC == LWIP_RC_RELEASE)
#define LWIP_VERSION_IS_DEVELOPMENT (LWIP_VERSION_RC == LWIP_RC_DEVELOPMENT)
#define LWIP_VERSION_IS_RC ((LWIP_VERSION_RC != LWIP_RC_RELEASE) && (LWIP_VERSION_RC != LWIP_RC_DEVELOPMENT))
/* Some helper defines to get a version string */
#define LWIP_VERSTR2(x) #x
#define LWIP_VERSTR(x) LWIP_VERSTR2(x)
#if LWIP_VERSION_IS_RELEASE
#define LWIP_VERSION_STRING_SUFFIX ""
#elif LWIP_VERSION_IS_DEVELOPMENT
#define LWIP_VERSION_STRING_SUFFIX "d"
#else
#define LWIP_VERSION_STRING_SUFFIX "rc" LWIP_VERSTR(LWIP_VERSION_RC)
#endif
/** Provides the version of the stack */
#define LWIP_VERSION ((LWIP_VERSION_MAJOR) << 24 | (LWIP_VERSION_MINOR) << 16 | \
(LWIP_VERSION_REVISION) << 8 | (LWIP_VERSION_RC))
/** Provides the version of the stack as string */
#define LWIP_VERSION_STRING LWIP_VERSTR(LWIP_VERSION_MAJOR) "." LWIP_VERSTR(LWIP_VERSION_MINOR) "." LWIP_VERSTR(LWIP_VERSION_REVISION) LWIP_VERSION_STRING_SUFFIX
/**
* @}
*/
/* Modules initialization */
void lwip_init(void);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_INIT_H */

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/**
* @file
* IP API
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_IP_H
#define LWIP_HDR_IP_H
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"
#include "lwip/err.h"
#include "lwip/netif.h"
#include "lwip/ip4.h"
#include "lwip/ip6.h"
#include "lwip/prot/ip.h"
#ifdef __cplusplus
extern "C" {
#endif
/* This is passed as the destination address to ip_output_if (not
to ip_output), meaning that an IP header already is constructed
in the pbuf. This is used when TCP retransmits. */
#define LWIP_IP_HDRINCL NULL
/** pbufs passed to IP must have a ref-count of 1 as their payload pointer
gets altered as the packet is passed down the stack */
#ifndef LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX
#define LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p) LWIP_ASSERT("p->ref == 1", (p)->ref == 1)
#endif
#if LWIP_NETIF_USE_HINTS
#define IP_PCB_NETIFHINT ;struct netif_hint netif_hints
#else /* LWIP_NETIF_USE_HINTS */
#define IP_PCB_NETIFHINT
#endif /* LWIP_NETIF_USE_HINTS */
/** This is the common part of all PCB types. It needs to be at the
beginning of a PCB type definition. It is located here so that
changes to this common part are made in one location instead of
having to change all PCB structs. */
#define IP_PCB \
/* ip addresses in network byte order */ \
ip_addr_t local_ip; \
ip_addr_t remote_ip; \
/* Bound netif index */ \
u8_t netif_idx; \
/* Socket options */ \
u8_t so_options; \
/* Type Of Service */ \
u8_t tos; \
/* Time To Live */ \
u8_t ttl \
/* link layer address resolution hint */ \
IP_PCB_NETIFHINT
struct ip_pcb {
/* Common members of all PCB types */
IP_PCB;
};
/*
* Option flags per-socket. These are the same like SO_XXX in sockets.h
*/
#define SOF_REUSEADDR 0x04U /* allow local address reuse */
#define SOF_KEEPALIVE 0x08U /* keep connections alive */
#define SOF_BROADCAST 0x20U /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
/* These flags are inherited (e.g. from a listen-pcb to a connection-pcb): */
#define SOF_INHERITED (SOF_REUSEADDR|SOF_KEEPALIVE)
/** Global variables of this module, kept in a struct for efficient access using base+index. */
struct ip_globals
{
/** The interface that accepted the packet for the current callback invocation. */
struct netif *current_netif;
/** The interface that received the packet for the current callback invocation. */
struct netif *current_input_netif;
#if LWIP_IPV4
/** Header of the input packet currently being processed. */
const struct ip_hdr *current_ip4_header;
#endif /* LWIP_IPV4 */
#if LWIP_IPV6
/** Header of the input IPv6 packet currently being processed. */
struct ip6_hdr *current_ip6_header;
#endif /* LWIP_IPV6 */
/** Total header length of current_ip4/6_header (i.e. after this, the UDP/TCP header starts) */
u16_t current_ip_header_tot_len;
/** Source IP address of current_header */
ip_addr_t current_iphdr_src;
/** Destination IP address of current_header */
ip_addr_t current_iphdr_dest;
};
extern struct ip_globals ip_data;
/** Get the interface that accepted the current packet.
* This may or may not be the receiving netif, depending on your netif/network setup.
* This function must only be called from a receive callback (udp_recv,
* raw_recv, tcp_accept). It will return NULL otherwise. */
#define ip_current_netif() (ip_data.current_netif)
/** Get the interface that received the current packet.
* This function must only be called from a receive callback (udp_recv,
* raw_recv, tcp_accept). It will return NULL otherwise. */
#define ip_current_input_netif() (ip_data.current_input_netif)
/** Total header length of ip(6)_current_header() (i.e. after this, the UDP/TCP header starts) */
#define ip_current_header_tot_len() (ip_data.current_ip_header_tot_len)
/** Source IP address of current_header */
#define ip_current_src_addr() (&ip_data.current_iphdr_src)
/** Destination IP address of current_header */
#define ip_current_dest_addr() (&ip_data.current_iphdr_dest)
#if LWIP_IPV4 && LWIP_IPV6
/** Get the IPv4 header of the current packet.
* This function must only be called from a receive callback (udp_recv,
* raw_recv, tcp_accept). It will return NULL otherwise. */
#define ip4_current_header() ip_data.current_ip4_header
/** Get the IPv6 header of the current packet.
* This function must only be called from a receive callback (udp_recv,
* raw_recv, tcp_accept). It will return NULL otherwise. */
#define ip6_current_header() ((const struct ip6_hdr*)(ip_data.current_ip6_header))
/** Returns TRUE if the current IP input packet is IPv6, FALSE if it is IPv4 */
#define ip_current_is_v6() (ip6_current_header() != NULL)
/** Source IPv6 address of current_header */
#define ip6_current_src_addr() (ip_2_ip6(&ip_data.current_iphdr_src))
/** Destination IPv6 address of current_header */
#define ip6_current_dest_addr() (ip_2_ip6(&ip_data.current_iphdr_dest))
/** Get the transport layer protocol */
#define ip_current_header_proto() (ip_current_is_v6() ? \
IP6H_NEXTH(ip6_current_header()) :\
IPH_PROTO(ip4_current_header()))
/** Get the transport layer header */
#define ip_next_header_ptr() ((const void*)((ip_current_is_v6() ? \
(const u8_t*)ip6_current_header() : (const u8_t*)ip4_current_header()) + ip_current_header_tot_len()))
/** Source IP4 address of current_header */
#define ip4_current_src_addr() (ip_2_ip4(&ip_data.current_iphdr_src))
/** Destination IP4 address of current_header */
#define ip4_current_dest_addr() (ip_2_ip4(&ip_data.current_iphdr_dest))
#elif LWIP_IPV4 /* LWIP_IPV4 && LWIP_IPV6 */
/** Get the IPv4 header of the current packet.
* This function must only be called from a receive callback (udp_recv,
* raw_recv, tcp_accept). It will return NULL otherwise. */
#define ip4_current_header() ip_data.current_ip4_header
/** Always returns FALSE when only supporting IPv4 only */
#define ip_current_is_v6() 0
/** Get the transport layer protocol */
#define ip_current_header_proto() IPH_PROTO(ip4_current_header())
/** Get the transport layer header */
#define ip_next_header_ptr() ((const void*)((const u8_t*)ip4_current_header() + ip_current_header_tot_len()))
/** Source IP4 address of current_header */
#define ip4_current_src_addr() (&ip_data.current_iphdr_src)
/** Destination IP4 address of current_header */
#define ip4_current_dest_addr() (&ip_data.current_iphdr_dest)
#elif LWIP_IPV6 /* LWIP_IPV4 && LWIP_IPV6 */
/** Get the IPv6 header of the current packet.
* This function must only be called from a receive callback (udp_recv,
* raw_recv, tcp_accept). It will return NULL otherwise. */
#define ip6_current_header() ((const struct ip6_hdr*)(ip_data.current_ip6_header))
/** Always returns TRUE when only supporting IPv6 only */
#define ip_current_is_v6() 1
/** Get the transport layer protocol */
#define ip_current_header_proto() IP6H_NEXTH(ip6_current_header())
/** Get the transport layer header */
#define ip_next_header_ptr() ((const void*)(((const u8_t*)ip6_current_header()) + ip_current_header_tot_len()))
/** Source IP6 address of current_header */
#define ip6_current_src_addr() (&ip_data.current_iphdr_src)
/** Destination IP6 address of current_header */
#define ip6_current_dest_addr() (&ip_data.current_iphdr_dest)
#endif /* LWIP_IPV6 */
/** Union source address of current_header */
#define ip_current_src_addr() (&ip_data.current_iphdr_src)
/** Union destination address of current_header */
#define ip_current_dest_addr() (&ip_data.current_iphdr_dest)
/** Gets an IP pcb option (SOF_* flags) */
#define ip_get_option(pcb, opt) ((pcb)->so_options & (opt))
/** Sets an IP pcb option (SOF_* flags) */
#define ip_set_option(pcb, opt) ((pcb)->so_options = (u8_t)((pcb)->so_options | (opt)))
/** Resets an IP pcb option (SOF_* flags) */
#define ip_reset_option(pcb, opt) ((pcb)->so_options = (u8_t)((pcb)->so_options & ~(opt)))
#if LWIP_IPV4 && LWIP_IPV6
/**
* @ingroup ip
* Output IP packet, netif is selected by source address
*/
#define ip_output(p, src, dest, ttl, tos, proto) \
(IP_IS_V6(dest) ? \
ip6_output(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto) : \
ip4_output(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto))
/**
* @ingroup ip
* Output IP packet to specified interface
*/
#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \
(IP_IS_V6(dest) ? \
ip6_output_if(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif) : \
ip4_output_if(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif))
/**
* @ingroup ip
* Output IP packet to interface specifying source address
*/
#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \
(IP_IS_V6(dest) ? \
ip6_output_if_src(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif) : \
ip4_output_if_src(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif))
/** Output IP packet that already includes an IP header. */
#define ip_output_if_hdrincl(p, src, dest, netif) \
(IP_IS_V6(dest) ? \
ip6_output_if(p, ip_2_ip6(src), LWIP_IP_HDRINCL, 0, 0, 0, netif) : \
ip4_output_if(p, ip_2_ip4(src), LWIP_IP_HDRINCL, 0, 0, 0, netif))
/** Output IP packet with netif_hint */
#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \
(IP_IS_V6(dest) ? \
ip6_output_hinted(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif_hint) : \
ip4_output_hinted(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif_hint))
/**
* @ingroup ip
* Get netif for address combination. See \ref ip6_route and \ref ip4_route
*/
#define ip_route(src, dest) \
(IP_IS_V6(dest) ? \
ip6_route(ip_2_ip6(src), ip_2_ip6(dest)) : \
ip4_route_src(ip_2_ip4(src), ip_2_ip4(dest)))
/**
* @ingroup ip
* Get netif for IP.
*/
#define ip_netif_get_local_ip(netif, dest) (IP_IS_V6(dest) ? \
ip6_netif_get_local_ip(netif, ip_2_ip6(dest)) : \
ip4_netif_get_local_ip(netif))
#define ip_debug_print(is_ipv6, p) ((is_ipv6) ? ip6_debug_print(p) : ip4_debug_print(p))
err_t ip_input(struct pbuf *p, struct netif *inp);
#elif LWIP_IPV4 /* LWIP_IPV4 && LWIP_IPV6 */
#define ip_output(p, src, dest, ttl, tos, proto) \
ip4_output(p, src, dest, ttl, tos, proto)
#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \
ip4_output_if(p, src, dest, ttl, tos, proto, netif)
#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \
ip4_output_if_src(p, src, dest, ttl, tos, proto, netif)
#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \
ip4_output_hinted(p, src, dest, ttl, tos, proto, netif_hint)
#define ip_output_if_hdrincl(p, src, dest, netif) \
ip4_output_if(p, src, LWIP_IP_HDRINCL, 0, 0, 0, netif)
#define ip_route(src, dest) \
ip4_route_src(src, dest)
#define ip_netif_get_local_ip(netif, dest) \
ip4_netif_get_local_ip(netif)
#define ip_debug_print(is_ipv6, p) ip4_debug_print(p)
#define ip_input ip4_input
#elif LWIP_IPV6 /* LWIP_IPV4 && LWIP_IPV6 */
#define ip_output(p, src, dest, ttl, tos, proto) \
ip6_output(p, src, dest, ttl, tos, proto)
#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \
ip6_output_if(p, src, dest, ttl, tos, proto, netif)
#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \
ip6_output_if_src(p, src, dest, ttl, tos, proto, netif)
#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \
ip6_output_hinted(p, src, dest, ttl, tos, proto, netif_hint)
#define ip_output_if_hdrincl(p, src, dest, netif) \
ip6_output_if(p, src, LWIP_IP_HDRINCL, 0, 0, 0, netif)
#define ip_route(src, dest) \
ip6_route(src, dest)
#define ip_netif_get_local_ip(netif, dest) \
ip6_netif_get_local_ip(netif, dest)
#define ip_debug_print(is_ipv6, p) ip6_debug_print(p)
#define ip_input ip6_input
#endif /* LWIP_IPV6 */
#define ip_route_get_local_ip(src, dest, netif, ipaddr) do { \
(netif) = ip_route(src, dest); \
(ipaddr) = ip_netif_get_local_ip(netif, dest); \
}while(0)
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_IP_H */

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/**
* @file
* IPv4 API
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_IP4_H
#define LWIP_HDR_IP4_H
#include "lwip/opt.h"
#if LWIP_IPV4
#include "lwip/def.h"
#include "lwip/pbuf.h"
#include "lwip/ip4_addr.h"
#include "lwip/err.h"
#include "lwip/netif.h"
#include "lwip/prot/ip4.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef LWIP_HOOK_IP4_ROUTE_SRC
#define LWIP_IPV4_SRC_ROUTING 1
#else
#define LWIP_IPV4_SRC_ROUTING 0
#endif
/** Currently, the function ip_output_if_opt() is only used with IGMP */
#define IP_OPTIONS_SEND (LWIP_IPV4 && LWIP_IGMP)
#define ip_init() /* Compatibility define, no init needed. */
struct netif *ip4_route(const ip4_addr_t *dest);
#if LWIP_IPV4_SRC_ROUTING
struct netif *ip4_route_src(const ip4_addr_t *src, const ip4_addr_t *dest);
#else /* LWIP_IPV4_SRC_ROUTING */
#define ip4_route_src(src, dest) ip4_route(dest)
#endif /* LWIP_IPV4_SRC_ROUTING */
err_t ip4_input(struct pbuf *p, struct netif *inp);
err_t ip4_output(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
u8_t ttl, u8_t tos, u8_t proto);
err_t ip4_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
u8_t ttl, u8_t tos, u8_t proto, struct netif *netif);
err_t ip4_output_if_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
u8_t ttl, u8_t tos, u8_t proto, struct netif *netif);
#if LWIP_NETIF_USE_HINTS
err_t ip4_output_hinted(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
u8_t ttl, u8_t tos, u8_t proto, struct netif_hint *netif_hint);
#endif /* LWIP_NETIF_USE_HINTS */
#if IP_OPTIONS_SEND
err_t ip4_output_if_opt(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options,
u16_t optlen);
err_t ip4_output_if_opt_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options,
u16_t optlen);
#endif /* IP_OPTIONS_SEND */
#if LWIP_MULTICAST_TX_OPTIONS
void ip4_set_default_multicast_netif(struct netif* default_multicast_netif);
#endif /* LWIP_MULTICAST_TX_OPTIONS */
#define ip4_netif_get_local_ip(netif) (((netif) != NULL) ? netif_ip_addr4(netif) : NULL)
#if IP_DEBUG
void ip4_debug_print(struct pbuf *p);
#else
#define ip4_debug_print(p)
#endif /* IP_DEBUG */
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV4 */
#endif /* LWIP_HDR_IP_H */

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/**
* @file
* IPv4 address API
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_IP4_ADDR_H
#define LWIP_HDR_IP4_ADDR_H
#include "lwip/opt.h"
#include "lwip/def.h"
#if LWIP_IPV4
#ifdef __cplusplus
extern "C" {
#endif
/** This is the aligned version of ip4_addr_t,
used as local variable, on the stack, etc. */
struct ip4_addr {
u32_t addr;
};
/** ip4_addr_t uses a struct for convenience only, so that the same defines can
* operate both on ip4_addr_t as well as on ip4_addr_p_t. */
typedef struct ip4_addr ip4_addr_t;
/* Forward declaration to not include netif.h */
struct netif;
/** 255.255.255.255 */
#define IPADDR_NONE ((u32_t)0xffffffffUL)
/** 127.0.0.1 */
#define IPADDR_LOOPBACK ((u32_t)0x7f000001UL)
/** 0.0.0.0 */
#define IPADDR_ANY ((u32_t)0x00000000UL)
/** 255.255.255.255 */
#define IPADDR_BROADCAST ((u32_t)0xffffffffUL)
/* Definitions of the bits in an Internet address integer.
On subnets, host and network parts are found according to
the subnet mask, not these masks. */
#define IP_CLASSA(a) ((((u32_t)(a)) & 0x80000000UL) == 0)
#define IP_CLASSA_NET 0xff000000
#define IP_CLASSA_NSHIFT 24
#define IP_CLASSA_HOST (0xffffffff & ~IP_CLASSA_NET)
#define IP_CLASSA_MAX 128
#define IP_CLASSB(a) ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL)
#define IP_CLASSB_NET 0xffff0000
#define IP_CLASSB_NSHIFT 16
#define IP_CLASSB_HOST (0xffffffff & ~IP_CLASSB_NET)
#define IP_CLASSB_MAX 65536
#define IP_CLASSC(a) ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL)
#define IP_CLASSC_NET 0xffffff00
#define IP_CLASSC_NSHIFT 8
#define IP_CLASSC_HOST (0xffffffff & ~IP_CLASSC_NET)
#define IP_CLASSD(a) (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL)
#define IP_CLASSD_NET 0xf0000000 /* These ones aren't really */
#define IP_CLASSD_NSHIFT 28 /* net and host fields, but */
#define IP_CLASSD_HOST 0x0fffffff /* routing needn't know. */
#define IP_MULTICAST(a) IP_CLASSD(a)
#define IP_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
#define IP_BADCLASS(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
#define IP_LOOPBACKNET 127 /* official! */
/** Set an IP address given by the four byte-parts */
#define IP4_ADDR(ipaddr, a,b,c,d) (ipaddr)->addr = PP_HTONL(LWIP_MAKEU32(a,b,c,d))
/** Copy IP address - faster than ip4_addr_set: no NULL check */
#define ip4_addr_copy(dest, src) ((dest).addr = (src).addr)
/** Safely copy one IP address to another (src may be NULL) */
#define ip4_addr_set(dest, src) ((dest)->addr = \
((src) == NULL ? 0 : \
(src)->addr))
/** Set complete address to zero */
#define ip4_addr_set_zero(ipaddr) ((ipaddr)->addr = 0)
/** Set address to IPADDR_ANY (no need for lwip_htonl()) */
#define ip4_addr_set_any(ipaddr) ((ipaddr)->addr = IPADDR_ANY)
/** Set address to loopback address */
#define ip4_addr_set_loopback(ipaddr) ((ipaddr)->addr = PP_HTONL(IPADDR_LOOPBACK))
/** Check if an address is in the loopback region */
#define ip4_addr_isloopback(ipaddr) (((ipaddr)->addr & PP_HTONL(IP_CLASSA_NET)) == PP_HTONL(((u32_t)IP_LOOPBACKNET) << 24))
/** Safely copy one IP address to another and change byte order
* from host- to network-order. */
#define ip4_addr_set_hton(dest, src) ((dest)->addr = \
((src) == NULL ? 0:\
lwip_htonl((src)->addr)))
/** IPv4 only: set the IP address given as an u32_t */
#define ip4_addr_set_u32(dest_ipaddr, src_u32) ((dest_ipaddr)->addr = (src_u32))
/** IPv4 only: get the IP address as an u32_t */
#define ip4_addr_get_u32(src_ipaddr) ((src_ipaddr)->addr)
/** Get the network address by combining host address with netmask */
#define ip4_addr_get_network(target, host, netmask) do { ((target)->addr = ((host)->addr) & ((netmask)->addr)); } while(0)
/**
* Determine if two address are on the same network.
*
* @arg addr1 IP address 1
* @arg addr2 IP address 2
* @arg mask network identifier mask
* @return !0 if the network identifiers of both address match
*/
#define ip4_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \
(mask)->addr) == \
((addr2)->addr & \
(mask)->addr))
#define ip4_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr)
#define ip4_addr_isany_val(addr1) ((addr1).addr == IPADDR_ANY)
#define ip4_addr_isany(addr1) ((addr1) == NULL || ip4_addr_isany_val(*(addr1)))
#define ip4_addr_isbroadcast(addr1, netif) ip4_addr_isbroadcast_u32((addr1)->addr, netif)
u8_t ip4_addr_isbroadcast_u32(u32_t addr, const struct netif *netif);
#define ip_addr_netmask_valid(netmask) ip4_addr_netmask_valid((netmask)->addr)
u8_t ip4_addr_netmask_valid(u32_t netmask);
#define ip4_addr_ismulticast(addr1) (((addr1)->addr & PP_HTONL(0xf0000000UL)) == PP_HTONL(0xe0000000UL))
#define ip4_addr_islinklocal(addr1) (((addr1)->addr & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xa9fe0000UL))
#define ip4_addr_debug_print_parts(debug, a, b, c, d) \
LWIP_DEBUGF(debug, ("%" U16_F ".%" U16_F ".%" U16_F ".%" U16_F, a, b, c, d))
#define ip4_addr_debug_print(debug, ipaddr) \
ip4_addr_debug_print_parts(debug, \
(u16_t)((ipaddr) != NULL ? ip4_addr1_16(ipaddr) : 0), \
(u16_t)((ipaddr) != NULL ? ip4_addr2_16(ipaddr) : 0), \
(u16_t)((ipaddr) != NULL ? ip4_addr3_16(ipaddr) : 0), \
(u16_t)((ipaddr) != NULL ? ip4_addr4_16(ipaddr) : 0))
#define ip4_addr_debug_print_val(debug, ipaddr) \
ip4_addr_debug_print_parts(debug, \
ip4_addr1_16_val(ipaddr), \
ip4_addr2_16_val(ipaddr), \
ip4_addr3_16_val(ipaddr), \
ip4_addr4_16_val(ipaddr))
/* Get one byte from the 4-byte address */
#define ip4_addr_get_byte(ipaddr, idx) (((const u8_t*)(&(ipaddr)->addr))[idx])
#define ip4_addr1(ipaddr) ip4_addr_get_byte(ipaddr, 0)
#define ip4_addr2(ipaddr) ip4_addr_get_byte(ipaddr, 1)
#define ip4_addr3(ipaddr) ip4_addr_get_byte(ipaddr, 2)
#define ip4_addr4(ipaddr) ip4_addr_get_byte(ipaddr, 3)
/* Get one byte from the 4-byte address, but argument is 'ip4_addr_t',
* not a pointer */
#define ip4_addr_get_byte_val(ipaddr, idx) ((u8_t)(((ipaddr).addr >> (idx * 8)) & 0xff))
#define ip4_addr1_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 0)
#define ip4_addr2_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 1)
#define ip4_addr3_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 2)
#define ip4_addr4_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 3)
/* These are cast to u16_t, with the intent that they are often arguments
* to printf using the U16_F format from cc.h. */
#define ip4_addr1_16(ipaddr) ((u16_t)ip4_addr1(ipaddr))
#define ip4_addr2_16(ipaddr) ((u16_t)ip4_addr2(ipaddr))
#define ip4_addr3_16(ipaddr) ((u16_t)ip4_addr3(ipaddr))
#define ip4_addr4_16(ipaddr) ((u16_t)ip4_addr4(ipaddr))
#define ip4_addr1_16_val(ipaddr) ((u16_t)ip4_addr1_val(ipaddr))
#define ip4_addr2_16_val(ipaddr) ((u16_t)ip4_addr2_val(ipaddr))
#define ip4_addr3_16_val(ipaddr) ((u16_t)ip4_addr3_val(ipaddr))
#define ip4_addr4_16_val(ipaddr) ((u16_t)ip4_addr4_val(ipaddr))
#define IP4ADDR_STRLEN_MAX 16
/** For backwards compatibility */
#define ip_ntoa(ipaddr) ipaddr_ntoa(ipaddr)
u32_t ipaddr_addr(const char *cp);
int ip4addr_aton(const char *cp, ip4_addr_t *addr);
/** returns ptr to static buffer; not reentrant! */
char *ip4addr_ntoa(const ip4_addr_t *addr);
char *ip4addr_ntoa_r(const ip4_addr_t *addr, char *buf, int buflen);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV4 */
#endif /* LWIP_HDR_IP_ADDR_H */

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