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/* MiniUPnP project
* http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
*
* Copyright (c) 2006, Thomas Bernard
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * 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 COPYRIGHT HOLDERS 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 THE COPYRIGHT OWNER 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netdb.h>
#include <errno.h>
#if defined(sun)
#include <sys/sockio.h>
#endif
#include "config.h"
#if HAVE_GETIFADDRS
# include <ifaddrs.h>
# ifdef __linux__
# ifndef AF_LINK
# define AF_LINK AF_INET
# endif
# else
# include <net/if_dl.h>
# endif
# ifndef IFF_SLAVE
# define IFF_SLAVE 0
# endif
#endif
#ifdef HAVE_NETLINK
# include <linux/rtnetlink.h>
# include <linux/netlink.h>
#endif
#include "upnpglobalvars.h"
#include "getifaddr.h"
#include "minissdp.h"
#include "utils.h"
#include "log.h"
static int
getifaddr(const char *ifname)
{
#if HAVE_GETIFADDRS
struct ifaddrs *ifap, *p;
struct sockaddr_in *addr_in;
if (getifaddrs(&ifap) != 0)
{
DPRINTF(E_ERROR, L_GENERAL, "getifaddrs(): %s\n", strerror(errno));
return -1;
}
for (p = ifap; p != NULL; p = p->ifa_next)
{
if (!p->ifa_addr || p->ifa_addr->sa_family != AF_INET)
continue;
if (ifname && strcmp(p->ifa_name, ifname) != 0)
continue;
addr_in = (struct sockaddr_in *)p->ifa_addr;
if (!ifname && (p->ifa_flags & (IFF_LOOPBACK | IFF_SLAVE)))
continue;
memcpy(&lan_addr[n_lan_addr].addr, &addr_in->sin_addr, sizeof(lan_addr[n_lan_addr].addr));
if (!inet_ntop(AF_INET, &addr_in->sin_addr, lan_addr[n_lan_addr].str, sizeof(lan_addr[0].str)) )
{
DPRINTF(E_ERROR, L_GENERAL, "inet_ntop(): %s\n", strerror(errno));
continue;
}
addr_in = (struct sockaddr_in *)p->ifa_netmask;
memcpy(&lan_addr[n_lan_addr].mask, &addr_in->sin_addr, sizeof(lan_addr[n_lan_addr].mask));
lan_addr[n_lan_addr].ifindex = if_nametoindex(p->ifa_name);
lan_addr[n_lan_addr].snotify = OpenAndConfSSDPNotifySocket(&lan_addr[n_lan_addr]);
if (lan_addr[n_lan_addr].snotify >= 0)
n_lan_addr++;
if (ifname || n_lan_addr >= MAX_LAN_ADDR)
break;
}
freeifaddrs(ifap);
if (ifname && !p)
{
DPRINTF(E_ERROR, L_GENERAL, "Network interface %s not found\n", ifname);
return -1;
}
#else
int s = socket(PF_INET, SOCK_STREAM, 0);
struct sockaddr_in addr;
struct ifconf ifc;
struct ifreq *ifr;
char buf[8192];
int i, n;
memset(&ifc, '\0', sizeof(ifc));
ifc.ifc_buf = buf;
ifc.ifc_len = sizeof(buf);
if (ioctl(s, SIOCGIFCONF, &ifc) < 0)
{
DPRINTF(E_ERROR, L_GENERAL, "SIOCGIFCONF: %s\n", strerror(errno));
close(s);
return -1;
}
n = ifc.ifc_len / sizeof(struct ifreq);
for (i = 0; i < n; i++)
{
ifr = &ifc.ifc_req[i];
if (ifname && strcmp(ifr->ifr_name, ifname) != 0)
continue;
if (!ifname &&
(ioctl(s, SIOCGIFFLAGS, ifr) < 0 || ifr->ifr_ifru.ifru_flags & IFF_LOOPBACK))
continue;
if (ioctl(s, SIOCGIFADDR, ifr) < 0)
continue;
memcpy(&addr, &(ifr->ifr_addr), sizeof(addr));
memcpy(&lan_addr[n_lan_addr].addr, &addr.sin_addr, sizeof(lan_addr[n_lan_addr].addr));
if (!inet_ntop(AF_INET, &addr.sin_addr, lan_addr[n_lan_addr].str, sizeof(lan_addr[0].str)))
{
DPRINTF(E_ERROR, L_GENERAL, "inet_ntop(): %s\n", strerror(errno));
close(s);
continue;
}
if (ioctl(s, SIOCGIFNETMASK, ifr) < 0)
continue;
memcpy(&addr, &(ifr->ifr_addr), sizeof(addr));
memcpy(&lan_addr[n_lan_addr].mask, &addr.sin_addr, sizeof(addr));
lan_addr[n_lan_addr].ifindex = if_nametoindex(ifr->ifr_name);
lan_addr[n_lan_addr].snotify = OpenAndConfSSDPNotifySocket(&lan_addr[n_lan_addr]);
if (lan_addr[n_lan_addr].snotify >= 0)
n_lan_addr++;
if (ifname || n_lan_addr >= MAX_LAN_ADDR)
break;
}
close(s);
if (ifname && i == n)
{
DPRINTF(E_ERROR, L_GENERAL, "Network interface %s not found\n", ifname);
return -1;
}
#endif
return n_lan_addr;
}
int
getsyshwaddr(char *buf, int len)
{
unsigned char mac[6];
int ret = -1;
#if defined(HAVE_GETIFADDRS) && !defined (__linux__) && !defined (__sun__)
struct ifaddrs *ifap, *p;
struct sockaddr_in *addr_in;
uint8_t a;
if (getifaddrs(&ifap) != 0)
{
DPRINTF(E_ERROR, L_GENERAL, "getifaddrs(): %s\n", strerror(errno));
return -1;
}
for (p = ifap; p != NULL; p = p->ifa_next)
{
if (p->ifa_addr && p->ifa_addr->sa_family == AF_LINK)
{
addr_in = (struct sockaddr_in *)p->ifa_addr;
a = (htonl(addr_in->sin_addr.s_addr) >> 0x18) & 0xFF;
if (a == 127)
continue;
#if defined(__linux__)
struct ifreq ifr;
int fd;
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0)
continue;
strncpy(ifr.ifr_name, p->ifa_name, IFNAMSIZ);
ret = ioctl(fd, SIOCGIFHWADDR, &ifr);
close(fd);
if (ret < 0)
continue;
memcpy(mac, ifr.ifr_hwaddr.sa_data, 6);
#else
struct sockaddr_dl *sdl;
sdl = (struct sockaddr_dl*)p->ifa_addr;
memcpy(mac, LLADDR(sdl), sdl->sdl_alen);
#endif
if (MACADDR_IS_ZERO(mac))
continue;
ret = 0;
break;
}
}
freeifaddrs(ifap);
#else
struct if_nameindex *ifaces, *if_idx;
struct ifreq ifr;
int fd;
memset(&mac, '\0', sizeof(mac));
/* Get the spatially unique node identifier */
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0)
return ret;
ifaces = if_nameindex();
if (!ifaces)
{
close(fd);
return ret;
}
for (if_idx = ifaces; if_idx->if_index; if_idx++)
{
strncpyt(ifr.ifr_name, if_idx->if_name, IFNAMSIZ);
if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
continue;
if (ifr.ifr_ifru.ifru_flags & IFF_LOOPBACK)
continue;
if (ioctl(fd, SIOCGIFHWADDR, &ifr) < 0)
continue;
#ifdef __sun__
if (MACADDR_IS_ZERO(ifr.ifr_addr.sa_data))
continue;
memcpy(mac, ifr.ifr_addr.sa_data, 6);
#else
if (MACADDR_IS_ZERO(ifr.ifr_hwaddr.sa_data))
continue;
memcpy(mac, ifr.ifr_hwaddr.sa_data, 6);
#endif
ret = 0;
break;
}
if_freenameindex(ifaces);
close(fd);
#endif
if (ret == 0)
{
if (len > 12)
sprintf(buf, "%02x%02x%02x%02x%02x%02x",
mac[0]&0xFF, mac[1]&0xFF, mac[2]&0xFF,
mac[3]&0xFF, mac[4]&0xFF, mac[5]&0xFF);
else if (len == 6)
memmove(buf, mac, 6);
}
return ret;
}
int
get_remote_mac(struct in_addr ip_addr, unsigned char *mac)
{
struct in_addr arp_ent;
FILE * arp;
char remote_ip[16];
int matches, hwtype, flags;
memset(mac, 0xFF, 6);
arp = fopen("/proc/net/arp", "r");
if (!arp)
return 1;
while (!feof(arp))
{
matches = fscanf(arp, "%15s 0x%8X 0x%8X %2hhx:%2hhx:%2hhx:%2hhx:%2hhx:%2hhx",
remote_ip, &hwtype, &flags,
&mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]);
if (matches != 9)
continue;
inet_pton(AF_INET, remote_ip, &arp_ent);
if (ip_addr.s_addr == arp_ent.s_addr)
break;
mac[0] = 0xFF;
}
fclose(arp);
if (mac[0] == 0xFF)
{
memset(mac, 0xFF, 6);
return 1;
}
return 0;
}
void
reload_ifaces(int force_notify)
{
struct in_addr old_addr[MAX_LAN_ADDR];
int i, j;
memset(&old_addr, 0xFF, sizeof(old_addr));
for (i = 0; i < n_lan_addr; i++)
{
memcpy(&old_addr[i], &lan_addr[i].addr, sizeof(struct in_addr));
close(lan_addr[i].snotify);
}
n_lan_addr = 0;
i = 0;
do {
getifaddr(runtime_vars.ifaces[i]);
i++;
} while (i < MAX_LAN_ADDR && runtime_vars.ifaces[i]);
for (i = 0; i < n_lan_addr; i++)
{
for (j = 0; j < MAX_LAN_ADDR; j++)
{
if (memcmp(&lan_addr[i].addr, &old_addr[j], sizeof(struct in_addr)) == 0)
break;
}
/* Send out startup notifies if it's a new interface, or on SIGHUP */
if (force_notify || j == MAX_LAN_ADDR)
{
DPRINTF(E_INFO, L_GENERAL, "Enabling interface %s/%s\n",
lan_addr[i].str, inet_ntoa(lan_addr[i].mask));
SendSSDPGoodbyes(lan_addr[i].snotify);
SendSSDPNotifies(lan_addr[i].snotify, lan_addr[i].str,
runtime_vars.port, runtime_vars.notify_interval);
}
}
}
int
OpenAndConfMonitorSocket(void)
{
#ifdef HAVE_NETLINK
struct sockaddr_nl addr;
int s;
int ret;
s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (s < 0)
{
perror("couldn't open NETLINK_ROUTE socket");
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.nl_family = AF_NETLINK;
addr.nl_groups = RTMGRP_IPV4_IFADDR;
ret = bind(s, (struct sockaddr*)&addr, sizeof(addr));
if (ret < 0)
{
perror("couldn't bind");
close(s);
return -1;
}
return s;
#else
return -1;
#endif
}
void
ProcessMonitorEvent(int s)
{
#ifdef HAVE_NETLINK
int len;
char buf[4096];
struct nlmsghdr *nlh;
int changed = 0;
nlh = (struct nlmsghdr*)buf;
len = recv(s, nlh, sizeof(buf), 0);
if (len <= 0)
return;
while ((NLMSG_OK(nlh, len)) && (nlh->nlmsg_type != NLMSG_DONE))
{
if (nlh->nlmsg_type == RTM_NEWADDR ||
nlh->nlmsg_type == RTM_DELADDR)
{
changed = 1;
}
nlh = NLMSG_NEXT(nlh, len);
}
if (changed)
reload_ifaces(0);
#endif
}