netdev - Re: [PATCH] ipv6: don't let node/interface scoped multicast traffic escape on the wire

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Date:	Mon, 11 Feb 2013 00:31:39 +0900
From:	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, erik.hugne@...csson.com,
	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Subject: Re: [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();
> 

Acked-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>

--yoshfuji
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