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authorNikolay Aleksandrov <nikolay@nvidia.com>2020-09-22 10:30:20 +0300
committerDavid S. Miller <davem@davemloft.net>2020-09-23 13:24:34 -0700
commit7d07a68c251080f8f2cfd071b7b3f7d1093a3375 (patch)
tree387e75a63e0712136db79a3d31042c3138196780 /net
parent88d4bd180419a7cde3947f191dc4e26fbb19f80b (diff)
net: bridge: mcast: when igmpv3/mldv2 are enabled lookup (S,G) first, then (*,G)
If (S,G) entries are enabled (igmpv3/mldv2) then look them up first. If there isn't a present (S,G) entry then try to find (*,G). Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_multicast.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index e1fb822b9ddb..4fd690bc848f 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -127,10 +127,28 @@ struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
switch (skb->protocol) {
case htons(ETH_P_IP):
ip.dst.ip4 = ip_hdr(skb)->daddr;
+ if (br->multicast_igmp_version == 3) {
+ struct net_bridge_mdb_entry *mdb;
+
+ ip.src.ip4 = ip_hdr(skb)->saddr;
+ mdb = br_mdb_ip_get_rcu(br, &ip);
+ if (mdb)
+ return mdb;
+ ip.src.ip4 = 0;
+ }
break;
#if IS_ENABLED(CONFIG_IPV6)
case htons(ETH_P_IPV6):
ip.dst.ip6 = ipv6_hdr(skb)->daddr;
+ if (br->multicast_mld_version == 2) {
+ struct net_bridge_mdb_entry *mdb;
+
+ ip.src.ip6 = ipv6_hdr(skb)->saddr;
+ mdb = br_mdb_ip_get_rcu(br, &ip);
+ if (mdb)
+ return mdb;
+ memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
+ }
break;
#endif
default: