From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pablo Neira Ayuso Subject: Re: [PATCH v3] netfilter: nf_conntrack_sip: Handle Cisco 7941/7945 IP phones Date: Mon, 17 Dec 2012 01:44:57 +0100 Message-ID: <20121217004457.GA12234@1984> References: <1290412334.2756.141.camel@edumazet-laptop> <1355703441.18919.6.camel@shinybook.infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Eric Dumazet , Kevin Cernekee , Patrick McHardy , "David S. Miller" , Alexey Kuznetsov , "Pekka Savola (ipv6)" , James Morris , Hideaki YOSHIFUJI , netfilter-devel@vger.kernel.org, netfilter@vger.kernel.org, coreteam@netfilter.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: David Woodhouse Return-path: Received: from mail.us.es ([193.147.175.20]:57956 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751442Ab2LQApD (ORCPT ); Sun, 16 Dec 2012 19:45:03 -0500 Content-Disposition: inline In-Reply-To: <1355703441.18919.6.camel@shinybook.infradead.org> Sender: netfilter-devel-owner@vger.kernel.org List-ID: Hi David, On Mon, Dec 17, 2012 at 12:17:21AM +0000, David Woodhouse wrote: > On Mon, 2010-11-22 at 08:52 +0100, Eric Dumazet wrote: > > Le dimanche 21 novembre 2010 =E0 18:40 -0800, Kevin Cernekee a =E9c= rit : > > > [v3: > > > Only activate the new forced_dport logic if the IP matches, but= the > > > port does not. ] > > >=20 > > > Most SIP devices use a source port of 5060/udp on SIP requests, s= o the > > > response automatically comes back to port 5060: > > >=20 > > > phone_ip:5060 -> proxy_ip:5060 REGISTER > > > proxy_ip:5060 -> phone_ip:5060 100 Trying > > >=20 > > > The newer Cisco IP phones, however, use a randomly chosen high so= urce > > > port for the SIP request but expect the response on port 5060: > > >=20 > > > phone_ip:49173 -> proxy_ip:5060 REGISTER > > > proxy_ip:5060 -> phone_ip:5060 100 Trying > > >=20 > > > Standard Linux NAT, with or without nf_nat_sip, will send the rep= ly back > > > to port 49173, not 5060: > > >=20 > > > phone_ip:49173 -> proxy_ip:5060 REGISTER > > > proxy_ip:5060 -> phone_ip:49173 100 Trying > > >=20 > > > But the phone is not listening on 49173, so it will never see the= reply. > > >=20 > > > This patch modifies nf_*_sip to work around this quirk by extract= ing > > > the SIP response port from the Via: header, iff the source IP in = the > > > packet header matches the source IP in the SIP request. > > >=20 > > > Signed-off-by: Kevin Cernekee > > > --- > >=20 > > Thanks for doing this work Keven ! > >=20 > > Acked-by: Eric Dumazet >=20 > What happened to this? OpenWRT is still carrying it, and it broke in > 3.7. Here's a completely untested update... I requested Kevin to resend a new version based on the current kernel tree while spinning on old pending patches since I have no access to that hardware, but no luck. So I'll review this and, since OpenWRT is carrying, I guess we can get this into net-next merge window. Thanks for the reminder. -- To unsubscribe from this list: send the line "unsubscribe netfilter-dev= el" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html