Hi, There are issues with multicast...it is not as easy as just reading Stevens and doing the relevant setsockopt() calls. There are portability issues with multicast, especially with respect to IGMPv2 vs. IGMPv3 compliant behavior.
I will try to dig up some references on it. In the mean time, you might want to look at libnet. They have a portability layer for multicast sockets. It is pretty close to what you have, but there is some additional stuff for other platforms (such as Windows) http://www.packetfactory.net/projects/libnet/ -- Craig Rodrigues http://home.attbi.com/~rodrigc [EMAIL PROTECTED]
