linux-kernel - Re: [PATCH v2] bridge: ebtables: fix reception of frames DNAT-ed to bridge device

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Date:   Tue, 21 Mar 2017 16:32:45 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Linus Lüssing <linus.luessing@...3.blue>
Cc:     netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        bridge@...ts.linux-foundation.org, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] bridge: ebtables: fix reception of frames DNAT-ed to
 bridge device

On Tue, 21 Mar 2017 23:28:45 +0100
Linus Lüssing <linus.luessing@...3.blue> wrote:

> However, the IP code drops it in the beginning of ip_input.c/ip_rcv()
> as the dnat target did not update the skb->pkt_type. If after
> dnat'ing the packet is now destined to us then the skb->pkt_type
> needs to be updated from PACKET_OTHERHOST to PACKET_HOST, too.

Why not fix DNAT netfilter module rather than hacking bridge code here.