netdev - Re: [Patch net] loopback: explicitly set pkt_type to PACKET

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Message-Id: <20140515.163400.1536463708975272927.davem@davemloft.net>
Date:	Thu, 15 May 2014 16:34:00 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	xiyou.wangcong@...il.com
Cc:	netdev@...r.kernel.org, ebiederm@...ssion.com,
	cwang@...pensource.com
Subject: Re: [Patch net] loopback: explicitly set pkt_type to PACKET_HOST

From: Cong Wang <xiyou.wangcong@...il.com>
Date: Wed, 14 May 2014 11:39:22 -0700

> From: Cong Wang <cwang@...pensource.com>
> 
> In a corner case where I redirect the packets from veth to lo,
> packets are dropped silently when entering IP stack. This is
> due to we have a different MAC addr on veth, so the packets are
> marked as PACKET_OTHERHOST. And after they are redirect to lo,
> this value is kept since lo has the same MAC addr with the packets.
> Loopback should explicitly set it to PACKET_HOST before calling
> eth_type_trans() for this specific case.
> 
> Cc: David S. Miller <davem@...emloft.net>
> Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
> Signed-off-by: Cong Wang <cwang@...pensource.com>

How exactly are you performing this redirection?
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