kris 9ff574d50e Merging my IGMP -sO patch. This adds build_igmp_raw() to easily build IGMP packets and uses it for -sO. Systems respond more when these packets are sent with an actual IGMP header. The RFC says they MUST verify the checksum, so that's most likely why I always got open|filtered instead of open. Since the different IGMP types all seem to have the checksum in the same place in the packet, it should at least tell us if it's supported or not even if the rest of the header is bogus (because the rest of the header has changed a little bit between the versions).

2007-01-17 17:40:16 +00:00

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