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ipv6: don't let node/interface scoped multicast traffic escape on the wire

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Reported-by: Erik Hugne <[email protected]>
Cc: Erik Hugne <[email protected]>
Cc: YOSHIFUJI Hideaki <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Acked-by: YOSHIFUJI Hideaki <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Hannes Frederic Sowa 2013-02-10 02:33:35 +00:00 • committed by David S. Miller
commit dd40851521
1 changed files with 7 additions and 0 deletions
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7
net/ipv6/ip6_output.c
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@ -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();