netdev - Re: [PATCH 1/1] ipv6 : ip6mr.c : Fix can't match the IPv6 multicast packets with input net device in netfilter FORWARD chain.

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Message-ID: <1343974247.3100.8.camel@barry.localdomain>
Date:	Fri, 03 Aug 2012 14:10:46 +0800
From:	Jun Zhao <mypopydev@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH 1/1] ipv6 : ip6mr.c : Fix can't match the IPv6
 multicast packets with input net device in netfilter FORWARD chain.

On Thu, 2012-08-02 at 16:20 -0700, David Miller wrote:
> From: Jun Zhao <mypopydev@...il.com>
> Date: Thu,  2 Aug 2012 21:00:55 +0800
> 
> > Current kernel change the skb's net device with output device before netfilter FORWARD chain,
> > that will lead to can't match the IPv6 multicast packets with input net device in netfilter
> > FORWARD chain.
> > 
> > the test case for reproduce this issue as follow:
> > 
> > IPv6 multicast udp stream from eth0(input device) to eth1(output device)
> 
> Your change means we now can't match on the VIF device in this situation.
> 
> I'm not applying this patch, it breaks as much as it fixes.

Hi, David:

Maybe I need to used conservative approach to fix it and don't breaks
much more, I will supply the version 2 patch for this issue.

Tks.


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