tree c9325f8cb76331c307b39d1348f8d668dfdfbc58
parent 36cff5a10c6b003fa2d0464848d5664b2bf723e0
author Linus Lüssing <linus.luessing@web.de> 1297930672 +0000
committer David S. Miller <davem@davemloft.net> 1298398049 -0800

bridge: Use IPv6 link-local address for multicast listener queries

Currently the bridge multicast snooping feature periodically issues
IPv6 general multicast listener queries to sense the absence of a
listener.

For this, it uses :: as its source address - however RFC 2710 requires:
"To be valid, the Query message MUST come from a link-local IPv6 Source
Address". Current Linux kernel versions seem to follow this requirement
and ignore our bogus MLD queries.

With this commit a link local address from the bridge interface is being
used to issue the MLD query, resulting in other Linux devices which are
multicast listeners in the network to respond with a MLD response (which
was not the case before).

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>