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| author | Nikolay Aleksandrov <nikolay@cumulusnetworks.com> | 2018-10-27 11:07:47 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-10-29 03:18:09 +0100 |
| commit | 0fe5119e267f3e3d8ac206895f5922195ec55a8a (patch) | |
| tree | 76359a83b0e5b14816875e261610f0634f77c750 /net/bridge | |
| parent | net: Properly unlink GRO packets on overflow. (diff) | |
| download | linux-0fe5119e267f3e3d8ac206895f5922195ec55a8a.tar.xz linux-0fe5119e267f3e3d8ac206895f5922195ec55a8a.zip | |
net: bridge: remove ipv6 zero address check in mcast queries
Recently a check was added which prevents marking of routers with zero
source address, but for IPv6 that cannot happen as the relevant RFCs
actually forbid such packets:
RFC 2710 (MLDv1):
"To be valid, the Query message MUST
come from a link-local IPv6 Source Address, be at least 24 octets
long, and have a correct MLD checksum."
Same goes for RFC 3810.
And also it can be seen as a requirement in ipv6_mc_check_mld_query()
which is used by the bridge to validate the message before processing
it. Thus any queries with :: source address won't be processed anyway.
So just remove the check for zero IPv6 source address from the query
processing function.
Fixes: 5a2de63fd1a5 ("bridge: do not add port to router list when receives query with source 0.0.0.0")
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
| -rw-r--r-- | net/bridge/br_multicast.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 41cdafbf2ebe..6bac0d6b7b94 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1428,8 +1428,7 @@ static void br_multicast_query_received(struct net_bridge *br, * is 0.0.0.0 should not be added to router port list. */ if ((saddr->proto == htons(ETH_P_IP) && saddr->u.ip4) || - (saddr->proto == htons(ETH_P_IPV6) && - !ipv6_addr_any(&saddr->u.ip6))) + saddr->proto == htons(ETH_P_IPV6)) br_multicast_mark_router(br, port); } |