char* mupnp_net_selectaddr(struct sockaddr* remoteaddr)
{
mUpnpNetworkInterfaceList* netIfList;
mUpnpNetworkInterface* netIf;
mUpnpNetworkInterface* selectNetIf;
char* selectNetIfAddr;
u_long laddr, lmask, raddr;
struct addrinfo hints;
struct addrinfo* netIfAddrInfo;
struct addrinfo* netMaskAddrInfo;
netIfList = mupnp_net_interfacelist_new();
if (!netIfList)
return mupnp_strdup("127.0.0.1");
if (mupnp_net_gethostinterfaces(netIfList) <= 0) {
mupnp_net_interfacelist_delete(netIfList);
return mupnp_strdup("127.0.0.1");
}
raddr = ntohl(((struct sockaddr_in*)remoteaddr)->sin_addr.s_addr);
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_NUMERICHOST | AI_PASSIVE;
selectNetIf = NULL;
if (1 <= mupnp_net_gethostinterfaces(netIfList)) {
for (netIf = mupnp_net_interfacelist_gets(netIfList); netIf; netIf = mupnp_net_interface_next(netIf)) {
if (getaddrinfo(mupnp_net_interface_getaddress(netIf), NULL, &hints, &netIfAddrInfo) != 0)
continue;
if (getaddrinfo(mupnp_net_interface_getnetmask(netIf), NULL, &hints, &netMaskAddrInfo) != 0) {
freeaddrinfo(netIfAddrInfo);
continue;
}
laddr = ntohl(((struct sockaddr_in*)netIfAddrInfo->ai_addr)->sin_addr.s_addr);
lmask = ntohl(((struct sockaddr_in*)netMaskAddrInfo->ai_addr)->sin_addr.s_addr);
if ((laddr & lmask) == (raddr & lmask))
selectNetIf = netIf;
freeaddrinfo(netIfAddrInfo);
freeaddrinfo(netMaskAddrInfo);
if (selectNetIf)
break;
}
}
if (!selectNetIf)
selectNetIf = mupnp_net_interfacelist_gets(netIfList);
selectNetIfAddr = mupnp_strdup(mupnp_net_interface_getaddress(selectNetIf));
mupnp_net_interfacelist_delete(netIfList);
return selectNetIfAddr;
}
bool mupnp_controlpoint_ipchanged(mUpnpControlPoint *ctrlPoint)
{
mUpnpNetworkInterfaceList *current, *added, *removed;
mUpnpNetworkInterface *netIf;
mUpnpDevice *dev, *tmp;
mUpnpSSDPPacket *ssdpPkt;
char *address;
mupnp_log_debug_l4("Entering...\n");
current = mupnp_net_interfacelist_new();
added = mupnp_net_interfacelist_new();
removed = mupnp_net_interfacelist_new();
if (current == NULL || added == NULL || removed == NULL)
{
if (current != NULL) mupnp_net_interfacelist_delete(current);
if (added != NULL) mupnp_net_interfacelist_delete(added);
if (removed != NULL) mupnp_net_interfacelist_delete(removed);
return false;
}
/* Get Interface changes */
mupnp_net_gethostinterfaces(current);
mupnp_net_interfacelist_getchanges(ctrlPoint->ifCache, current,
added, removed);
/* Remove all devices registered through old interface */
for (netIf = mupnp_net_interfacelist_gets(removed);
netIf != NULL; netIf = mupnp_net_interface_next(netIf))
{
mupnp_controlpoint_lock(ctrlPoint);
tmp = mupnp_controlpoint_getdevices(ctrlPoint);
while (tmp != NULL)
{
dev = tmp; tmp = mupnp_device_next(dev);
ssdpPkt = mupnp_device_getssdppacket(dev);
address = mupnp_ssdp_packet_getlocaladdress(ssdpPkt);
if (address != NULL &&
mupnp_strcmp(address, mupnp_net_interface_getaddress(netIf)) == 0)
{
/* This device has been received from the
removed interface, so it does not exist */
mupnp_controlpoint_unlock(ctrlPoint);
mupnp_controlpoint_removedevicebyssdppacket(ctrlPoint,
ssdpPkt);
mupnp_controlpoint_lock(ctrlPoint);
address = NULL; dev = NULL; ssdpPkt = NULL;
}
}
mupnp_controlpoint_unlock(ctrlPoint);
}
/* Launch new M-SEARCH */
mupnp_controlpoint_search(ctrlPoint, MUPNP_ST_ROOT_DEVICE);
/**** Cache current interfaces ****/
mupnp_net_gethostinterfaces(ctrlPoint->ifCache);
mupnp_net_interfacelist_delete(current);
mupnp_net_interfacelist_delete(added);
mupnp_net_interfacelist_delete(removed);
mupnp_log_debug_l4("Leaving...\n");
return true;
}
