diff options
| -rw-r--r-- | net/bridge/br_multicast.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 4accd0de6e8e..5388955b2a3c 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1491,8 +1491,14 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, * - MLD has always Router Alert hop-by-hop option * - But we do not support jumbrograms. */ - if (ip6h->version != 6 || - ip6h->nexthdr != IPPROTO_HOPOPTS || + if (ip6h->version != 6) + return 0; + + /* Prevent flooding this packet if there is no listener present */ + if (ipv6_is_transient_multicast(&ip6h->daddr)) + BR_INPUT_SKB_CB(skb)->mrouters_only = 1; + + if (ip6h->nexthdr != IPPROTO_HOPOPTS || ip6h->payload_len == 0) return 0; |