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SF Tracker [ 1628629 ] Multicast interface patch

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Submitted By: 
Fredrik Svensson - svefredrik

This patch fixes two problems:
* Specify the IP address for the interface when we do setsockopt IP_ADD_MEMBERSHIP. This makes it possible to run when no default router has been configured.
* Explicitly set the multicast interface through setsockopt IP_MULTICAST_IF. Avoids socket error -207 in some cases.


git-svn-id: https://pupnp.svn.sourceforge.net/svnroot/pupnp/trunk@119 119443c7-1b9e-41f8-b6fc-b9c35fce742c
This commit is contained in:
Marcelo Roberto Jimenez 2007-01-09 12:31:17 +00:00
parent 363ac6e007
commit 2331839f69
1 changed files with 13 additions and 1 deletions
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14
upnp/src/ssdp/ssdp_server.c
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@ -922,6 +922,7 @@ get_ssdp_sockets( MiniServerSockArray * out )
struct ip_mreq ssdpMcastAddr;
struct sockaddr_in ssdpAddr;
int option = 1;
struct in_addr addr;
CLIENTONLY( if( ( ssdpReqSock = socket( AF_INET, SOCK_DGRAM, 0 ) )
== UPNP_INVALID_SOCKET ) {
@ -997,7 +998,7 @@ get_ssdp_sockets( MiniServerSockArray * out )
}
memset( ( void * )&ssdpMcastAddr, 0, sizeof( struct ip_mreq ) );
ssdpMcastAddr.imr_interface.s_addr = htonl( INADDR_ANY );
ssdpMcastAddr.imr_interface.s_addr = inet_addr( LOCAL_HOST );
ssdpMcastAddr.imr_multiaddr.s_addr = inet_addr( SSDP_IP );
if( setsockopt( ssdpSock, IPPROTO_IP, IP_ADD_MEMBERSHIP,
( char * )&ssdpMcastAddr,
@ -1012,6 +1013,17 @@ get_ssdp_sockets( MiniServerSockArray * out )
CLIENTONLY( UpnpCloseSocket( ssdpReqSock ) );
return UPNP_E_SOCKET_ERROR;
}
/* Set multicast interface. */
memset( ( void * )&addr, 0, sizeof( struct in_addr ));
addr.s_addr = inet_addr(LOCAL_HOST);
if (setsockopt(ssdpSock, IPPROTO_IP, IP_MULTICAST_IF,
(char *)&addr, sizeof addr) != 0) {
DBGONLY(UpnpPrintf( UPNP_INFO, SSDP, __FILE__, __LINE__,
"Couldn't set multicast interface.\n" ));
/* This is probably not a critical error, so let's continue. */
}
// result is not checked becuase it will fail in WinMe and Win9x.
setsockopt( ssdpSock, IPPROTO_IP,
IP_MULTICAST_TTL, &ttl, sizeof( ttl ) );