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| author | Linus Lüssing <linus.luessing@web.de> | 2011-02-17 08:17:52 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-02-22 10:07:29 -0800 |
| commit | fe29ec41aaa51902aebd63658dfb04fe6fea8be5 (patch) | |
| tree | c9325f8cb76331c307b39d1348f8d668dfdfbc58 | |
| parent | 36cff5a10c6b003fa2d0464848d5664b2bf723e0 (diff) | |
| download | linux-fe29ec41aaa51902aebd63658dfb04fe6fea8be5.tar.gz linux-fe29ec41aaa51902aebd63658dfb04fe6fea8be5.tar.bz2 linux-fe29ec41aaa51902aebd63658dfb04fe6fea8be5.zip | |
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>
| -rw-r--r-- | net/bridge/br_multicast.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index c1f24e4d0820..030a002ff8ee 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -445,7 +445,8 @@ static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, ip6h->payload_len = htons(8 + sizeof(*mldq)); ip6h->nexthdr = IPPROTO_HOPOPTS; ip6h->hop_limit = 1; - ipv6_addr_set(&ip6h->saddr, 0, 0, 0, 0); + ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, + &ip6h->saddr); ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |