diff options
| author | Edward Chron <echron@arista.com> | 2019-01-31 15:00:40 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-02-03 09:54:05 -0800 |
| commit | 1d2f4ebbbeb1ec055dcd3cf3dba833cfd0a84f3a (patch) | |
| tree | 54befe3292a9c39fa94f44b0bdb55b65770e4c12 /net/ipv4/route.c | |
| parent | f66ebd14a71bd50a46801a7cabd779a1a324bf76 (diff) | |
ipv4/igmp: Don't drop IGMP pkt with zeros src addr
Don't drop IGMP packets with a source address of all zeros which are
IGMP proxy reports. This is documented in Section 2.1.1 IGMP
Forwarding Rules of RFC 4541 IGMP and MLD Snooping Switches
Considerations.
Signed-off-by: Edward Chron <echron@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 99be68b15da0..16259ea9df54 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1608,7 +1608,8 @@ int ip_mc_validate_source(struct sk_buff *skb, __be32 daddr, __be32 saddr, return -EINVAL; if (ipv4_is_zeronet(saddr)) { - if (!ipv4_is_local_multicast(daddr)) + if (!ipv4_is_local_multicast(daddr) && + ip_hdr(skb)->protocol != IPPROTO_IGMP) return -EINVAL; } else { err = fib_validate_source(skb, saddr, 0, tos, 0, dev, |