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authorFernando Luis Vázquez Cao <fernando@oss.ntt.co.jp>2011-06-13 15:06:58 +0000
committerDavid S. Miller <davem@conan.davemloft.net>2011-06-16 23:14:13 -0400
commitfc2af6c73fc9449cd5894a36bb76b8f8c0e49fd8 (patch)
treef2013b06d5c6c049529598477e15584a1e77c342 /MAINTAINERS
parent62b2bcb49cca72f6d3f39f831127a6ab315a475d (diff)
downloadlinux-fc2af6c73fc9449cd5894a36bb76b8f8c0e49fd8.tar.gz
IGMP snooping: set mrouters_only flag for IPv6 traffic properly
Upon reception of a MGM report packet the kernel sets the mrouters_only flag in a skb that is a clone of the original skb, which means that the bridge loses track of MGM packets (cb buffers are tied to a specific skb and not shared) and it ends up forwading join requests to the bridge interface. This can cause unexpected membership timeouts and intermitent/permanent loss of connectivity as described in RFC 4541 [2.1.1. IGMP Forwarding Rules]: A snooping switch should forward IGMP Membership Reports only to those ports where multicast routers are attached. [...] Sending membership reports to other hosts can result, for IGMPv1 and IGMPv2, in unintentionally preventing a host from joining a specific multicast group. Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Signed-off-by: David S. Miller <davem@conan.davemloft.net>
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