void
renew_mcast_membership(struct lan_addr_s *iface)
{
if (DropMulticastMembership(sssdp, iface) < 0)
{
DPRINTF(E_DEBUG, L_SSDP, "Failed to drop multicast membership for address %s\n",
iface->str);
}
if (AddMulticastMembership(sssdp, iface) < 0)
{
DPRINTF(E_ERROR, L_SSDP, "Failed to add multicast membership for address %s\n",
iface->str);
}
}
int
ProcessInterfaceDown(struct ifinfomsg *ifi)
{
struct lan_iface_s * lan_iface;
struct lan_iface_s * lan_iface2;
/* check if we have this iface */
for(lan_iface = lan_ifaces.lh_first; lan_iface != NULL; lan_iface = lan_iface->list.le_next)
if (lan_iface->iface.index == ifi->ifi_index)
break;
if (lan_iface == NULL)
return 0;
/* one of our interfaces is going down, clean up */
syslog(LOG_INFO, "Interface down: %s", lan_iface->iface.name);
/* remove multicast membership for SSDP */
if(DropMulticastMembership(sudp, lan_iface->lan_addr->addr.s_addr, lan_iface->iface.index) < 0)
syslog(LOG_WARNING, "Failed to drop multicast membership for interface %s (%s)", lan_iface->iface.name, lan_iface->lan_addr->str);
else
syslog(LOG_INFO, "Multicast membership dropped for %s (%s)", lan_iface->iface.name, lan_iface->lan_addr->str);
/* closing SSDP notify socket */
close(lan_iface->snotify);
#ifdef ENABLE_NATPMP
/* closing NAT-PMP socket if it's not used anymore */
for(lan_iface2 = lan_ifaces.lh_first; lan_iface2 != NULL; lan_iface2 = lan_iface2->list.le_next)
if (lan_iface2 != lan_iface && lan_iface2->snatpmp == lan_iface->snatpmp)
break;
if (lan_iface2 == NULL)
close(lan_iface->snatpmp);
#endif
/* del corresponding lan_iface entry */
LIST_REMOVE(lan_iface, list);
free(lan_iface);
return 0;
}
/* open the UDP socket used to send SSDP notifications to
* the multicast group reserved for them */
int
OpenAndConfSSDPNotifySocket(struct lan_addr_s *iface)
{
int s;
unsigned char loopchar = 0;
/* no need
int bcast = 1;
*/
uint8_t ttl = 2; /* UDA v1.1 says :
The TTL for the IP packet SHOULD default to 2 and
SHOULD be configurable. */
struct in_addr mc_if;
struct sockaddr_in sockname;
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0)
{
DPRINTF(E_ERROR, L_SSDP, "socket(udp_notify): %s\n", strerror(errno));
return -1;
}
mc_if.s_addr = iface->addr.s_addr;
if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, (char *)&loopchar, sizeof(loopchar)) < 0)
{
DPRINTF(E_ERROR, L_SSDP, "setsockopt(udp_notify, IP_MULTICAST_LOOP): %s\n", strerror(errno));
close(s);
return -1;
}
if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, (char *)&mc_if, sizeof(mc_if)) < 0)
{
DPRINTF(E_ERROR, L_SSDP, "setsockopt(udp_notify, IP_MULTICAST_IF): %s\n", strerror(errno));
close(s);
return -1;
}
setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
/* no need
if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &bcast, sizeof(bcast)) < 0)
{
DPRINTF(E_ERROR, L_SSDP, "setsockopt(udp_notify, SO_BROADCAST): %s\n", strerror(errno));
close(s);
return -1;
}
*/
memset(&sockname, 0, sizeof(struct sockaddr_in));
sockname.sin_family = AF_INET;
sockname.sin_addr.s_addr = iface->addr.s_addr;
if (bind(s, (struct sockaddr *)&sockname, sizeof(struct sockaddr_in)) < 0)
{
DPRINTF(E_ERROR, L_SSDP, "bind(udp_notify): %s\n", strerror(errno));
close(s);
return -1;
}
if (DropMulticastMembership(sssdp, iface) < 0)
{
DPRINTF(E_DEBUG, L_SSDP, "Failed to drop multicast membership for address %s\n",
iface->str);
}
if (AddMulticastMembership(sssdp, iface) < 0)
{
DPRINTF(E_WARN, L_SSDP, "Failed to add multicast membership for address %s\n",
iface->str);
}
return s;
}
