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nodemcu-firmware/app/lwip/app/ping.c

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/**
* @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.
*
*/
/*
* copyright (c) 2010 - 2011 Espressif System
*/
#include "lwip/opt.h"
#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
#include "lwip/mem.h"
#include "lwip/raw.h"
#include "lwip/icmp.h"
#include "lwip/netif.h"
#include "lwip/sys.h"
#include "lwip/timers.h"
#include "lwip/inet_chksum.h"
#include "os_type.h"
#include "osapi.h"
#include "lwip/app/ping.h"
#if PING_USE_SOCKETS
#include "lwip/sockets.h"
#include "lwip/inet.h"
#endif /* PING_USE_SOCKETS */
#ifdef MEMLEAK_DEBUG
static const char mem_debug_file[] ICACHE_RODATA_ATTR = __FILE__;
#endif
/* ping variables */
static u16_t ping_seq_num = 0;
static u32_t ping_time;
static void ICACHE_FLASH_ATTR ping_timeout(void* arg)
{
struct ping_msg *pingmsg = (struct ping_msg *)arg;
pingmsg->timeout_count ++;
if (pingmsg->ping_opt->recv_function == NULL){
os_printf("ping timeout\n");
} else {
struct ping_resp pingresp;
os_bzero(&pingresp, sizeof(struct ping_resp));
pingresp.ping_err = -1;
pingmsg->ping_opt->recv_function(pingmsg->ping_opt, (void*)&pingresp);
}
}
/** Prepare a echo ICMP request */
static void ICACHE_FLASH_ATTR
ping_prepare_echo( struct icmp_echo_hdr *iecho, u16_t len)
{
size_t i = 0;
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;
++ ping_seq_num;
if (ping_seq_num == 0x7fff)
ping_seq_num = 0;
iecho->seqno = 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);
}
static void ICACHE_FLASH_ATTR
ping_prepare_er(struct icmp_echo_hdr *iecho, u16_t len)
{
ICMPH_TYPE_SET(iecho, ICMP_ER);
ICMPH_CODE_SET(iecho, 0);
iecho->chksum = 0;
iecho->chksum = inet_chksum(iecho, len);
}
/* Ping using the raw ip */
static u8_t ICACHE_FLASH_ATTR
ping_recv(void *arg, struct raw_pcb *pcb, struct pbuf *p, ip_addr_t *addr)
{
struct icmp_echo_hdr *iecho = NULL;
static u16_t seqno = 0;
struct ping_msg *pingmsg = (struct ping_msg*)arg;
LWIP_UNUSED_ARG(arg);
LWIP_UNUSED_ARG(pcb);
LWIP_UNUSED_ARG(addr);
LWIP_ASSERT("p != NULL", p != NULL);
if (pbuf_header( p, -PBUF_IP_HLEN)==0) {
iecho = (struct icmp_echo_hdr *)p->payload;
if ((iecho->id == PING_ID) && (iecho->seqno == htons(ping_seq_num)) && iecho->type == ICMP_ER) {
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)));
if (iecho->seqno != seqno){
/* do some ping result processing */
{
struct ip_hdr *iphdr = NULL;
char ipaddrstr[16];
ip_addr_t source_ip;
sys_untimeout(ping_timeout, pingmsg);
os_bzero(&source_ip, sizeof(ip_addr_t));
os_bzero(ipaddrstr, sizeof(ipaddrstr));
uint32 delay = system_relative_time(pingmsg->ping_sent);
delay /= PING_COARSE;
iphdr = (struct ip_hdr*)((u8*)iecho - PBUF_IP_HLEN);
source_ip.addr = iphdr->src.addr;
ipaddr_ntoa_r(&source_ip,ipaddrstr, sizeof(ipaddrstr));
if (pingmsg->ping_opt->recv_function == NULL){
os_printf("recv %s: byte = %d, time = %d ms, seq = %d\n",ipaddrstr, PING_DATA_SIZE, delay, ntohs(iecho->seqno));
} else {
struct ping_resp pingresp;
os_bzero(&pingresp, sizeof(struct ping_resp));
pingresp.bytes = PING_DATA_SIZE;
pingresp.resp_time = delay;
pingresp.seqno = ntohs(iecho->seqno);
pingresp.ping_err = 0;
pingmsg->ping_opt->recv_function(pingmsg->ping_opt,(void*) &pingresp);
}
}
seqno = iecho->seqno;
}
PING_RESULT(1);
pbuf_free(p);
return 1; /* eat the packet */
}
// } else if(iecho->type == ICMP_ECHO){
// struct pbuf *q = NULL;
// os_printf("receive ping request:seq=%d\n", ntohs(iecho->seqno));
// q = pbuf_alloc(PBUF_IP, (u16_t)p->tot_len, PBUF_RAM);
// if (q!=NULL) {
// pbuf_copy(q, p);
// iecho = (struct icmp_echo_hdr *)q->payload;
// ping_prepare_er(iecho, q->tot_len);
// raw_sendto(pcb, q, addr);
// pbuf_free(q);
// }
// pbuf_free(p);
// return 1;
// }
}
return 0; /* don't eat the packet */
}
static void ICACHE_FLASH_ATTR
ping_send(struct raw_pcb *raw, ip_addr_t *addr)
{
struct pbuf *p = NULL;
struct icmp_echo_hdr *iecho = NULL;
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);
ping_time = sys_now();
}
pbuf_free(p);
}
static void ICACHE_FLASH_ATTR
ping_coarse_tmr(void *arg)
{
struct ping_msg *pingmsg = (struct ping_msg*)arg;
struct ping_option *ping_opt= NULL;
struct ping_resp pingresp;
ip_addr_t ping_target;
LWIP_ASSERT("ping_timeout: no pcb given!", pingmsg != NULL);
ping_target.addr = pingmsg->ping_opt->ip;
ping_opt = pingmsg->ping_opt;
if (--pingmsg->sent_count != 0){
pingmsg ->ping_sent = system_get_time();
ping_send(pingmsg->ping_pcb, &ping_target);
sys_timeout(PING_TIMEOUT_MS, ping_timeout, pingmsg);
sys_timeout(pingmsg->coarse_time, ping_coarse_tmr, pingmsg);
} else {
uint32 delay = system_relative_time(pingmsg->ping_start);
delay /= PING_COARSE;
// ping_seq_num = 0;
if (ping_opt->sent_function == NULL){
os_printf("ping %d, timeout %d, total payload %d bytes, %d ms\n",
pingmsg->max_count, pingmsg->timeout_count, PING_DATA_SIZE*(pingmsg->max_count - pingmsg->timeout_count),delay);
} else {
os_bzero(&pingresp, sizeof(struct ping_resp));
pingresp.total_count = pingmsg->max_count;
pingresp.timeout_count = pingmsg->timeout_count;
pingresp.total_bytes = PING_DATA_SIZE*(pingmsg->max_count - pingmsg->timeout_count);
pingresp.total_time = delay;
pingresp.ping_err = 0;
}
sys_untimeout(ping_coarse_tmr, pingmsg);
raw_remove(pingmsg->ping_pcb);
os_free(pingmsg);
if (ping_opt->sent_function != NULL)
ping_opt->sent_function(ping_opt,(uint8*)&pingresp);
}
}
static bool ICACHE_FLASH_ATTR
ping_raw_init(struct ping_msg *pingmsg)
{
if (pingmsg == NULL)
return false;
ip_addr_t ping_target;
pingmsg->ping_pcb = raw_new(IP_PROTO_ICMP);
LWIP_ASSERT("ping_pcb != NULL", pingmsg->ping_pcb != NULL);
raw_recv(pingmsg->ping_pcb, ping_recv, pingmsg);
raw_bind(pingmsg->ping_pcb, IP_ADDR_ANY);
ping_target.addr = pingmsg->ping_opt->ip;
pingmsg ->ping_sent = system_get_time();
ping_send(pingmsg->ping_pcb, &ping_target);
sys_timeout(PING_TIMEOUT_MS, ping_timeout, pingmsg);
sys_timeout(pingmsg->coarse_time, ping_coarse_tmr, pingmsg);
return true;
}
bool ICACHE_FLASH_ATTR
ping_start(struct ping_option *ping_opt)
{
struct ping_msg *pingmsg = NULL;
pingmsg = (struct ping_msg *)os_zalloc(sizeof(struct ping_msg));
if (pingmsg == NULL || ping_opt == NULL)
return false;
pingmsg->ping_opt = ping_opt;
if (ping_opt->count != 0)
pingmsg->max_count = ping_opt->count;
else
pingmsg->max_count = DEFAULT_PING_MAX_COUNT;
if (ping_opt->coarse_time != 0)
pingmsg->coarse_time = ping_opt->coarse_time * PING_COARSE;
else
pingmsg->coarse_time = PING_COARSE;
pingmsg->ping_start = system_get_time();
pingmsg->sent_count = pingmsg->max_count;
return ping_raw_init(pingmsg);
}
bool ICACHE_FLASH_ATTR
ping_regist_recv(struct ping_option *ping_opt, ping_recv_function ping_recv)
{
if (ping_opt == NULL)
return false;
ping_opt ->recv_function = ping_recv;
return true;
}
bool ICACHE_FLASH_ATTR
ping_regist_sent(struct ping_option *ping_opt, ping_sent_function ping_sent)
{
if (ping_opt == NULL)
return false;
ping_opt ->sent_function = ping_sent;
return true;
}
#endif /* LWIP_RAW */
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