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168 lines (157 loc) · 4.22 KB
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/* $Id: upnputils.c,v 1.8 2014/02/05 17:00:26 nanard Exp $ */
/* MiniUPnP project
* http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
* (c) 2006-2014 Thomas Bernard
* This software is subject to the conditions detailed
* in the LICENCE file provided within the distribution */
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#ifdef AF_LINK
#include <net/if_dl.h>
#endif
#include "upnputils.h"
#include "upnpglobalvars.h"
#ifdef ENABLE_IPV6
#include "getroute.h"
#endif
int
sockaddr_to_string(const struct sockaddr * addr, char * str, size_t size)
{
char buffer[64];
unsigned short port = 0;
int n = -1;
switch(addr->sa_family)
{
case AF_INET6:
inet_ntop(addr->sa_family,
&((struct sockaddr_in6 *)addr)->sin6_addr,
buffer, sizeof(buffer));
port = ntohs(((struct sockaddr_in6 *)addr)->sin6_port);
n = snprintf(str, size, "[%s]:%hu", buffer, port);
break;
case AF_INET:
inet_ntop(addr->sa_family,
&((struct sockaddr_in *)addr)->sin_addr,
buffer, sizeof(buffer));
port = ntohs(((struct sockaddr_in *)addr)->sin_port);
n = snprintf(str, size, "%s:%hu", buffer, port);
break;
#ifdef AF_LINK
#if defined(__sun)
/* solaris does not seem to have link_ntoa */
/* #define link_ntoa _link_ntoa */
#define link_ntoa(x) "dummy-link_ntoa"
#endif
case AF_LINK:
{
struct sockaddr_dl * sdl = (struct sockaddr_dl *)addr;
n = snprintf(str, size, "index=%hu type=%d %s",
sdl->sdl_index, sdl->sdl_type,
link_ntoa(sdl));
}
break;
#endif
default:
n = snprintf(str, size, "unknown address family %d", addr->sa_family);
#if 0
n = snprintf(str, size, "unknown address family %d "
"%02x %02x %02x %02x %02x %02x %02x %02x",
addr->sa_family,
addr->sa_data[0], addr->sa_data[1], (unsigned)addr->sa_data[2], addr->sa_data[3],
addr->sa_data[4], addr->sa_data[5], (unsigned)addr->sa_data[6], addr->sa_data[7]);
#endif
}
return n;
}
int
set_non_blocking(int fd)
{
int flags = fcntl(fd, F_GETFL);
if(flags < 0)
return 0;
if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0)
return 0;
return 1;
}
struct lan_addr_s *
get_lan_for_peer(const struct sockaddr * peer)
{
struct lan_addr_s * lan_addr = NULL;
char dbg_str[64];
#ifdef ENABLE_IPV6
if(peer->sa_family == AF_INET6)
{
struct sockaddr_in6 * peer6 = (struct sockaddr_in6 *)peer;
if(IN6_IS_ADDR_V4MAPPED(&peer6->sin6_addr))
{
struct in_addr peer_addr;
memcpy(&peer_addr, &peer6->sin6_addr.s6_addr[12], 4);
for(lan_addr = lan_addrs.lh_first;
lan_addr != NULL;
lan_addr = lan_addr->list.le_next)
{
if( (peer_addr.s_addr & lan_addr->mask.s_addr)
== (lan_addr->addr.s_addr & lan_addr->mask.s_addr))
break;
}
}
else
{
int index = -1;
if(peer6->sin6_scope_id > 0)
index = (int)peer6->sin6_scope_id;
else
{
if(get_src_for_route_to(peer, NULL, NULL, &index) < 0)
return NULL;
}
syslog(LOG_DEBUG, "%s looking for LAN interface index=%d",
"get_lan_for_peer()", index);
for(lan_addr = lan_addrs.lh_first;
lan_addr != NULL;
lan_addr = lan_addr->list.le_next)
{
syslog(LOG_DEBUG,
"ifname=%s index=%u str=%s addr=%08x mask=%08x",
lan_addr->ifname, lan_addr->index,
lan_addr->str,
ntohl(lan_addr->addr.s_addr),
ntohl(lan_addr->mask.s_addr));
if(index == (int)lan_addr->index)
break;
}
}
}
else if(peer->sa_family == AF_INET)
{
#endif
for(lan_addr = lan_addrs.lh_first;
lan_addr != NULL;
lan_addr = lan_addr->list.le_next)
{
if( (((const struct sockaddr_in *)peer)->sin_addr.s_addr & lan_addr->mask.s_addr)
== (lan_addr->addr.s_addr & lan_addr->mask.s_addr))
break;
}
#ifdef ENABLE_IPV6
}
#endif
sockaddr_to_string(peer, dbg_str, sizeof(dbg_str));
if(lan_addr) {
syslog(LOG_DEBUG, "%s: %s found in LAN %s %s",
"get_lan_for_peer()", dbg_str,
lan_addr->ifname, lan_addr->str);
} else {
syslog(LOG_DEBUG, "%s: %s not found !", "get_lan_for_peer()",
dbg_str);
}
return lan_addr;
}