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miniupnpc-libevent/upnpc-libevent.c: detect local IP address and use it

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This commit is contained in:
Thomas Bernard 2014-11-14 12:39:58 +01:00
parent 3bf2398903
commit cbd262749f
1 changed files with 59 additions and 3 deletions
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62
miniupnpc-libevent/upnpc-libevent.c
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@ -1,4 +1,4 @@
/* $Id: upnpc-libevent.c,v 1.5 2014/11/13 09:46:12 nanard Exp $ */
/* $Id: upnpc-libevent.c,v 1.7 2014/11/14 11:37:45 nanard Exp $ */
/* miniupnpc-libevent
* Copyright (c) 2008-2014, Thomas BERNARD <miniupnp@free.fr>
* http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
@ -18,16 +18,22 @@
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "miniupnpc-libevent.h"
static struct event_base *base = NULL;
static char local_address[32];
static void sighandler(int signal)
{
(void)signal;
/*printf("signal %d\n", signal);*/
event_base_loopbreak(base);
if(base != NULL)
event_base_loopbreak(base);
}
/* ready callback */
@ -61,7 +67,7 @@ static void soap(int code, void * data)
break;
case EGetMaxRate:
printf("DownStream MaxBitRate = %s\t", GetValueFromNameValueList(&p->soap_response_data, "NewLayer1DownstreamMaxBitRate"));
upnpc_add_port_mapping(p, NULL, 60001, 60002, "192.168.0.42", "TCP", "test port mapping", 0);
upnpc_add_port_mapping(p, NULL, 60001, 60002, local_address, "TCP", "test port mapping", 0);
printf("UpStream MaxBitRate = %s\n", GetValueFromNameValueList(&p->soap_response_data, "NewLayer1UpstreamMaxBitRate"));
state = EAddPortMapping;
break;
@ -86,6 +92,51 @@ static void soap(int code, void * data)
}
}
/* use a UDP "connection" to 8.8.8.8
* to retrieve local address */
int find_local_address(void)
{
int s;
struct sockaddr_in local, remote;
socklen_t len;
s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(s < 0) {
perror("socket");
return -1;
}
memset(&local, 0, sizeof(local));
memset(&remote, 0, sizeof(remote));
/* bind to local port 4567 */
local.sin_family = AF_INET;
local.sin_port = htons(4567);
local.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind(s, (struct sockaddr *)&local, sizeof(local)) < 0) {
perror("bind");
return -1;
}
/* "connect" google's DNS server at 8.8.8.8 port 4567 */
remote.sin_family = AF_INET;
remote.sin_port = htons(4567);
remote.sin_addr.s_addr = inet_addr("8.8.8.8");
if(connect(s, (struct sockaddr *)&remote, sizeof(remote)) < 0) {
perror("connect");
return -1;
}
len = sizeof(local);
if(getsockname(s, (struct sockaddr *)&local, &len) < 0) {
perror("getsockname");
return -1;
}
if(inet_ntop(AF_INET, &(local.sin_addr), local_address, sizeof(local_address)) == NULL) {
perror("inet_ntop");
return -1;
}
printf("local address : %s\n", local_address);
close(s);
return 0;
}
/* program entry point */
@ -104,6 +155,11 @@ int main(int argc, char * * argv)
if(sigaction(SIGINT, &sa, NULL) < 0) {
perror("sigaction");
}
if(find_local_address() < 0) {
fprintf(stderr, "failed to get local address\n");
return 1;
}
#ifdef DEBUG
event_enable_debug_mode();
#if LIBEVENT_VERSION_NUMBER >= 0x02010100