The following commit has been merged in the master branch: commit 5b0bf526dde7f43853c741b0e301fa02c4ad761d Author: Marek Lindner lindner_marek@yahoo.de Date: Thu Oct 19 17:13:44 2006 +0200

bind to parent interface if alias interface is given

diff --git a/linux.c b/linux.c index 4bc9d81..b4cd116 100755 --- a/linux.c +++ b/linux.c @@ -69,16 +69,22 @@ int get_forwarding(void)

int bind_to_iface( int udp_recv_sock, char *dev ) {

- if ( setsockopt( udp_recv_sock, SOL_SOCKET, SO_BINDTODEVICE, dev, strlen ( dev ) + 1 ) < 0 ) - { - if ( errno == 19 ) { - fprintf( stderr, "Warning: Cannot bind socket to alias device %s\n", dev ); - } else { - fprintf( stderr, "Cannot bind socket to device %s : %s \n", dev, strerror(errno) ); - return -1; - } + char *colon_ptr; + + /* if given interface is an alias bind to parent interface */ + if ( ( colon_ptr = strchr( dev, ':' ) ) != NULL ) + *colon_ptr = '\0'; + + if ( setsockopt( udp_recv_sock, SOL_SOCKET, SO_BINDTODEVICE, dev, strlen ( dev ) + 1 ) < 0 ) { + + fprintf( stderr, "Cannot bind socket to device %s : %s \n", dev, strerror(errno) ); + return -1; + }

+ if ( colon_ptr != NULL ) + *colon_ptr = ':'; + return 1;

}