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authorHannes Frederic Sowa <hannes@stressinduktion.org>2013-02-10 02:33:35 +0000
committerDavid S. Miller <davem@davemloft.net>2013-02-11 14:00:54 -0500
commitdd40851521361e07c1f61e79cca941a63ad311bc (patch)
tree65a46a983bf53caff192d6735b85b96eb5a45c34
parent65ab999da808f72e3fe82be8f7d35050d3126005 (diff)
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ipv6: don't let node/interface scoped multicast traffic escape on the wire
Reported-by: Erik Hugne <erik.hugne@ericsson.com> Cc: Erik Hugne <erik.hugne@ericsson.com> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv6/ip6_output.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index c953825..155eccf 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -120,6 +120,13 @@ static int ip6_finish_output2(struct sk_buff *skb)
IP6_UPD_PO_STATS(dev_net(dev), idev, IPSTATS_MIB_OUTMCAST,
skb->len);
+
+ if (IPV6_ADDR_MC_SCOPE(&ipv6_hdr(skb)->daddr) <=
+ IPV6_ADDR_SCOPE_NODELOCAL &&
+ !(dev->flags & IFF_LOOPBACK)) {
+ kfree_skb(skb);
+ return 0;
+ }
}
rcu_read_lock_bh();