Re: IGMP packets?

[Chris Wright <chrisw@osdl.org>]

* FoObArf00@netscape.net (FoObArf00@netscape.net) wrote:
> I have 3 machines.  A (eth0) is connected to B (eth1) with a cross over
> cable and B (eth0) and C (eth0) are on a switch.  I want to forward the
> igmp queries and reports that A (eth1) generates when joining/leaving a
> multicast group on B (eth1) from B(eth0) to C (eth0).  I put the code to
> do this on different places such as ip_rcv, ip_route_input, etc and no
> luck.  The weird thing is that it works when I do a tcpdump on B's eth1.

Sounds like B(eth1) is filtering the packets.  Does it also work if you
enable IFF_ALLMULTI on eth1 (instead of IFF_PROMISC)?  Also, what kernel
are you using?  Does a group join on A generate a v1 or v3 report?

thanks,
-chris