[PATCH] only allow IGMP to multicast addresses

Old patch by Krishna Ramachandran

[PATCH] only allow IGMP to multicast addresses
Old patch by Krishna Ramachandran
8bd2ec16 · Dave Jones · Linus Torvalds · e496a2dc · 8bd2ec16
Commit 8bd2ec16 authored Oct 07, 2002 by Dave Jones Committed by Linus Torvalds Oct 07, 2002
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net/ipv4/igmp.c net/ipv4/igmp.c +6 -0

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--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -367,6 +367,12 @@ int igmp_rcv(struct sk_buff *skb)
 		return 0;
 	}

+	if (skb->pkt_type!=PACKET_MULTICAST) {
+		in_dev_put(in_dev);
+		kfree_skb(skb);
+		return 0;
+	}
+
 	switch (ih->type) {
 	case IGMP_HOST_MEMBERSHIP_QUERY:
 		igmp_heard_query(in_dev, ih->code, ih->group);