mirror of
https://github.com/lwip-tcpip/lwip.git
synced 2024-08-23 14:46:01 +00:00
397 lines
10 KiB
C
397 lines
10 KiB
C
/**
|
|
* @file
|
|
* Ping sender module
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* This is an example of a "ping" sender (with raw API and socket API).
|
|
* It can be used as a start point to maintain opened a network connection, or
|
|
* like a network "watchdog" for your device.
|
|
*
|
|
*/
|
|
|
|
#include "lwip/opt.h"
|
|
|
|
#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
|
|
|
|
#include "ping.h"
|
|
|
|
#include "lwip/mem.h"
|
|
#include "lwip/raw.h"
|
|
#include "lwip/icmp.h"
|
|
#include "lwip/netif.h"
|
|
#include "lwip/sys.h"
|
|
#include "lwip/timeouts.h"
|
|
#include "lwip/inet_chksum.h"
|
|
#include "lwip/prot/ip4.h"
|
|
|
|
#if PING_USE_SOCKETS
|
|
#include "lwip/sockets.h"
|
|
#include "lwip/inet.h"
|
|
#include <string.h>
|
|
#endif /* PING_USE_SOCKETS */
|
|
|
|
|
|
/**
|
|
* PING_DEBUG: Enable debugging for PING.
|
|
*/
|
|
#ifndef PING_DEBUG
|
|
#define PING_DEBUG LWIP_DBG_ON
|
|
#endif
|
|
|
|
/** ping receive timeout - in milliseconds */
|
|
#ifndef PING_RCV_TIMEO
|
|
#define PING_RCV_TIMEO 1000
|
|
#endif
|
|
|
|
/** ping delay - in milliseconds */
|
|
#ifndef PING_DELAY
|
|
#define PING_DELAY 1000
|
|
#endif
|
|
|
|
/** ping identifier - must fit on a u16_t */
|
|
#ifndef PING_ID
|
|
#define PING_ID 0xAFAF
|
|
#endif
|
|
|
|
/** ping additional data size to include in the packet */
|
|
#ifndef PING_DATA_SIZE
|
|
#define PING_DATA_SIZE 32
|
|
#endif
|
|
|
|
/** ping result action - no default action */
|
|
#ifndef PING_RESULT
|
|
#define PING_RESULT(ping_ok)
|
|
#endif
|
|
|
|
/* ping variables */
|
|
static const ip_addr_t* ping_target;
|
|
static u16_t ping_seq_num;
|
|
#ifdef LWIP_DEBUG
|
|
static u32_t ping_time;
|
|
#endif /* LWIP_DEBUG */
|
|
#if !PING_USE_SOCKETS
|
|
static struct raw_pcb *ping_pcb;
|
|
#endif /* PING_USE_SOCKETS */
|
|
|
|
/** Prepare a echo ICMP request */
|
|
static void
|
|
ping_prepare_echo( struct icmp_echo_hdr *iecho, u16_t len)
|
|
{
|
|
size_t i;
|
|
size_t data_len = len - sizeof(struct icmp_echo_hdr);
|
|
|
|
ICMPH_TYPE_SET(iecho, ICMP_ECHO);
|
|
ICMPH_CODE_SET(iecho, 0);
|
|
iecho->chksum = 0;
|
|
iecho->id = PING_ID;
|
|
iecho->seqno = lwip_htons(++ping_seq_num);
|
|
|
|
/* fill the additional data buffer with some data */
|
|
for(i = 0; i < data_len; i++) {
|
|
((char*)iecho)[sizeof(struct icmp_echo_hdr) + i] = (char)i;
|
|
}
|
|
|
|
iecho->chksum = inet_chksum(iecho, len);
|
|
}
|
|
|
|
#if PING_USE_SOCKETS
|
|
|
|
/* Ping using the socket ip */
|
|
static err_t
|
|
ping_send(int s, const ip_addr_t *addr)
|
|
{
|
|
int err;
|
|
struct icmp_echo_hdr *iecho;
|
|
struct sockaddr_storage to;
|
|
size_t ping_size = sizeof(struct icmp_echo_hdr) + PING_DATA_SIZE;
|
|
LWIP_ASSERT("ping_size is too big", ping_size <= 0xffff);
|
|
|
|
#if LWIP_IPV6
|
|
if(IP_IS_V6(addr) && !ip6_addr_isipv4mappedipv6(ip_2_ip6(addr))) {
|
|
/* todo: support ICMP6 echo */
|
|
return ERR_VAL;
|
|
}
|
|
#endif /* LWIP_IPV6 */
|
|
|
|
iecho = (struct icmp_echo_hdr *)mem_malloc((mem_size_t)ping_size);
|
|
if (!iecho) {
|
|
return ERR_MEM;
|
|
}
|
|
|
|
ping_prepare_echo(iecho, (u16_t)ping_size);
|
|
|
|
#if LWIP_IPV4
|
|
if(IP_IS_V4(addr)) {
|
|
struct sockaddr_in *to4 = (struct sockaddr_in*)&to;
|
|
to4->sin_len = sizeof(to4);
|
|
to4->sin_family = AF_INET;
|
|
inet_addr_from_ip4addr(&to4->sin_addr, ip_2_ip4(addr));
|
|
}
|
|
#endif /* LWIP_IPV4 */
|
|
|
|
#if LWIP_IPV6
|
|
if(IP_IS_V6(addr)) {
|
|
struct sockaddr_in6 *to6 = (struct sockaddr_in6*)&to;
|
|
to6->sin6_len = sizeof(to6);
|
|
to6->sin6_family = AF_INET6;
|
|
inet6_addr_from_ip6addr(&to6->sin6_addr, ip_2_ip6(addr));
|
|
}
|
|
#endif /* LWIP_IPV6 */
|
|
|
|
err = lwip_sendto(s, iecho, ping_size, 0, (struct sockaddr*)&to, sizeof(to));
|
|
|
|
mem_free(iecho);
|
|
|
|
return (err ? ERR_OK : ERR_VAL);
|
|
}
|
|
|
|
static void
|
|
ping_recv(int s)
|
|
{
|
|
char buf[64];
|
|
int len;
|
|
struct sockaddr_storage from;
|
|
int fromlen = sizeof(from);
|
|
|
|
while((len = lwip_recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr*)&from, (socklen_t*)&fromlen)) > 0) {
|
|
if (len >= (int)(sizeof(struct ip_hdr)+sizeof(struct icmp_echo_hdr))) {
|
|
ip_addr_t fromaddr;
|
|
memset(&fromaddr, 0, sizeof(fromaddr));
|
|
|
|
#if LWIP_IPV4
|
|
if(from.ss_family == AF_INET) {
|
|
struct sockaddr_in *from4 = (struct sockaddr_in*)&from;
|
|
inet_addr_to_ip4addr(ip_2_ip4(&fromaddr), &from4->sin_addr);
|
|
IP_SET_TYPE_VAL(fromaddr, IPADDR_TYPE_V4);
|
|
}
|
|
#endif /* LWIP_IPV4 */
|
|
|
|
#if LWIP_IPV6
|
|
if(from.ss_family == AF_INET6) {
|
|
struct sockaddr_in6 *from6 = (struct sockaddr_in6*)&from;
|
|
inet6_addr_to_ip6addr(ip_2_ip6(&fromaddr), &from6->sin6_addr);
|
|
IP_SET_TYPE_VAL(fromaddr, IPADDR_TYPE_V6);
|
|
}
|
|
#endif /* LWIP_IPV6 */
|
|
|
|
LWIP_DEBUGF( PING_DEBUG, ("ping: recv "));
|
|
ip_addr_debug_print_val(PING_DEBUG, fromaddr);
|
|
LWIP_DEBUGF( PING_DEBUG, (" %"U32_F" ms\n", (sys_now() - ping_time)));
|
|
|
|
/* todo: support ICMP6 echo */
|
|
#if LWIP_IPV4
|
|
if (IP_IS_V4_VAL(fromaddr)) {
|
|
struct ip_hdr *iphdr;
|
|
struct icmp_echo_hdr *iecho;
|
|
|
|
iphdr = (struct ip_hdr *)buf;
|
|
iecho = (struct icmp_echo_hdr *)(buf + (IPH_HL(iphdr) * 4));
|
|
if ((iecho->id == PING_ID) && (iecho->seqno == lwip_htons(ping_seq_num))) {
|
|
/* do some ping result processing */
|
|
PING_RESULT((ICMPH_TYPE(iecho) == ICMP_ER));
|
|
return;
|
|
} else {
|
|
LWIP_DEBUGF( PING_DEBUG, ("ping: drop\n"));
|
|
}
|
|
}
|
|
#endif /* LWIP_IPV4 */
|
|
}
|
|
fromlen = sizeof(from);
|
|
}
|
|
|
|
if (len == 0) {
|
|
LWIP_DEBUGF( PING_DEBUG, ("ping: recv - %"U32_F" ms - timeout\n", (sys_now()-ping_time)));
|
|
}
|
|
|
|
/* do some ping result processing */
|
|
PING_RESULT(0);
|
|
}
|
|
|
|
static void
|
|
ping_thread(void *arg)
|
|
{
|
|
int s;
|
|
int ret;
|
|
|
|
#if LWIP_SO_SNDRCVTIMEO_NONSTANDARD
|
|
int timeout = PING_RCV_TIMEO;
|
|
#else
|
|
struct timeval timeout;
|
|
timeout.tv_sec = PING_RCV_TIMEO/1000;
|
|
timeout.tv_usec = (PING_RCV_TIMEO%1000)*1000;
|
|
#endif
|
|
LWIP_UNUSED_ARG(arg);
|
|
|
|
#if LWIP_IPV6
|
|
if(IP_IS_V4(ping_target) || ip6_addr_isipv4mappedipv6(ip_2_ip6(ping_target))) {
|
|
s = lwip_socket(AF_INET6, SOCK_RAW, IP_PROTO_ICMP);
|
|
} else {
|
|
s = lwip_socket(AF_INET6, SOCK_RAW, IP6_NEXTH_ICMP6);
|
|
}
|
|
#else
|
|
s = lwip_socket(AF_INET, SOCK_RAW, IP_PROTO_ICMP);
|
|
#endif
|
|
if (s < 0) {
|
|
return;
|
|
}
|
|
|
|
ret = lwip_setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
|
|
LWIP_ASSERT("setting receive timeout failed", ret == 0);
|
|
LWIP_UNUSED_ARG(ret);
|
|
|
|
while (1) {
|
|
if (ping_send(s, ping_target) == ERR_OK) {
|
|
LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
|
|
ip_addr_debug_print(PING_DEBUG, ping_target);
|
|
LWIP_DEBUGF( PING_DEBUG, ("\n"));
|
|
|
|
#ifdef LWIP_DEBUG
|
|
ping_time = sys_now();
|
|
#endif /* LWIP_DEBUG */
|
|
ping_recv(s);
|
|
} else {
|
|
LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
|
|
ip_addr_debug_print(PING_DEBUG, ping_target);
|
|
LWIP_DEBUGF( PING_DEBUG, (" - error\n"));
|
|
}
|
|
sys_msleep(PING_DELAY);
|
|
}
|
|
}
|
|
|
|
#else /* PING_USE_SOCKETS */
|
|
|
|
/* Ping using the raw ip */
|
|
static u8_t
|
|
ping_recv(void *arg, struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *addr)
|
|
{
|
|
struct icmp_echo_hdr *iecho;
|
|
LWIP_UNUSED_ARG(arg);
|
|
LWIP_UNUSED_ARG(pcb);
|
|
LWIP_UNUSED_ARG(addr);
|
|
LWIP_ASSERT("p != NULL", p != NULL);
|
|
|
|
if ((p->tot_len >= (PBUF_IP_HLEN + sizeof(struct icmp_echo_hdr))) &&
|
|
pbuf_remove_header(p, PBUF_IP_HLEN) == 0) {
|
|
iecho = (struct icmp_echo_hdr *)p->payload;
|
|
|
|
if ((iecho->id == PING_ID) && (iecho->seqno == lwip_htons(ping_seq_num))) {
|
|
LWIP_DEBUGF( PING_DEBUG, ("ping: recv "));
|
|
ip_addr_debug_print(PING_DEBUG, addr);
|
|
LWIP_DEBUGF( PING_DEBUG, (" %"U32_F" ms\n", (sys_now()-ping_time)));
|
|
|
|
/* do some ping result processing */
|
|
PING_RESULT(1);
|
|
pbuf_free(p);
|
|
return 1; /* eat the packet */
|
|
}
|
|
/* not eaten, restore original packet */
|
|
pbuf_add_header(p, PBUF_IP_HLEN);
|
|
}
|
|
|
|
return 0; /* don't eat the packet */
|
|
}
|
|
|
|
static void
|
|
ping_send(struct raw_pcb *raw, const ip_addr_t *addr)
|
|
{
|
|
struct pbuf *p;
|
|
struct icmp_echo_hdr *iecho;
|
|
size_t ping_size = sizeof(struct icmp_echo_hdr) + PING_DATA_SIZE;
|
|
|
|
LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
|
|
ip_addr_debug_print(PING_DEBUG, addr);
|
|
LWIP_DEBUGF( PING_DEBUG, ("\n"));
|
|
LWIP_ASSERT("ping_size <= 0xffff", ping_size <= 0xffff);
|
|
|
|
p = pbuf_alloc(PBUF_IP, (u16_t)ping_size, PBUF_RAM);
|
|
if (!p) {
|
|
return;
|
|
}
|
|
if ((p->len == p->tot_len) && (p->next == NULL)) {
|
|
iecho = (struct icmp_echo_hdr *)p->payload;
|
|
|
|
ping_prepare_echo(iecho, (u16_t)ping_size);
|
|
|
|
raw_sendto(raw, p, addr);
|
|
#ifdef LWIP_DEBUG
|
|
ping_time = sys_now();
|
|
#endif /* LWIP_DEBUG */
|
|
}
|
|
pbuf_free(p);
|
|
}
|
|
|
|
static void
|
|
ping_timeout(void *arg)
|
|
{
|
|
struct raw_pcb *pcb = (struct raw_pcb*)arg;
|
|
|
|
LWIP_ASSERT("ping_timeout: no pcb given!", pcb != NULL);
|
|
|
|
ping_send(pcb, ping_target);
|
|
|
|
sys_timeout(PING_DELAY, ping_timeout, pcb);
|
|
}
|
|
|
|
static void
|
|
ping_raw_init(void)
|
|
{
|
|
ping_pcb = raw_new(IP_PROTO_ICMP);
|
|
LWIP_ASSERT("ping_pcb != NULL", ping_pcb != NULL);
|
|
|
|
raw_recv(ping_pcb, ping_recv, NULL);
|
|
raw_bind(ping_pcb, IP_ADDR_ANY);
|
|
sys_timeout(PING_DELAY, ping_timeout, ping_pcb);
|
|
}
|
|
|
|
void
|
|
ping_send_now(void)
|
|
{
|
|
LWIP_ASSERT("ping_pcb != NULL", ping_pcb != NULL);
|
|
ping_send(ping_pcb, ping_target);
|
|
}
|
|
|
|
#endif /* PING_USE_SOCKETS */
|
|
|
|
void
|
|
ping_init(const ip_addr_t* ping_addr)
|
|
{
|
|
ping_target = ping_addr;
|
|
|
|
#if PING_USE_SOCKETS
|
|
sys_thread_new("ping_thread", ping_thread, NULL, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
|
|
#else /* PING_USE_SOCKETS */
|
|
ping_raw_init();
|
|
#endif /* PING_USE_SOCKETS */
|
|
}
|
|
|
|
#endif /* LWIP_RAW */
|