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Date: Sun, 10 Feb 2013 13:33:35 +0100 From: Hannes Frederic Sowa <hannes@...essinduktion.org> To: netdev@...r.kernel.org Cc: yoshfuji@...ux-ipv6.org, erik.hugne@...csson.com Subject: [PATCH] ipv6: don't let node/interface scoped multicast traffic escape on the wire Reported-by: Erik Hugne <erik.hugne@...csson.com> Cc: Erik Hugne <erik.hugne@...csson.com> Cc: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org> Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org> --- net/ipv6/ip6_output.c | 7 +++++++ 1 file changed, 7 insertions(+) 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(); -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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