Hi. <quote> IP_MULTICAST_IF (since Linux 1.2) Set the local device for a multicast socket. Argument is an ip_mreqn or ip_mreq structure similar to IP_ADD_MEMBERSHIP. </quote> That is not true. Setsockopt recognizes only ip_mreqn and in_addr. I made patch which makes it recognize ip_mreq as well. So that would be probably ok. http://patchwork.ozlabs.org/patch/156815/ On the other hand, getsockopt works only with in_addr. That I think is good behaviour but manpages here needs to be corrected in this way (read part needs to be added here) Thanks! Jirka -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html