Commit 1d2f4ebb authored Jan 31, 2019 by Edward Chron Committed by David S. Miller Feb 03, 2019

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>

parent f66ebd14

net/ipv4/route.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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,