From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick McHardy Subject: Re: [PATCH 2/3] netfilter: xtables: add PKTTYPE target Date: Mon, 09 Feb 2009 16:13:17 +0100 Message-ID: <4990480D.9060900@trash.net> References: <20090128145801.7501.44459.stgit@Decadence> <20090128145826.7501.34671.stgit@Decadence> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Cc: netfilter-devel@vger.kernel.org To: Pablo Neira Ayuso Return-path: Received: from stinky.trash.net ([213.144.137.162]:57047 "EHLO stinky.trash.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755012AbZBIPNT (ORCPT ); Mon, 9 Feb 2009 10:13:19 -0500 In-Reply-To: <20090128145826.7501.34671.stgit@Decadence> Sender: netfilter-devel-owner@vger.kernel.org List-ID: Pablo Neira Ayuso wrote: > This patch adds the PKTTYPE target which can be used to mangle the > skbuff packet type field. This target is useful in conjunction with > the arptables mcmangle target to TCP working again when a > multicast hardware address is used. An example of its use: > > iptables -I PREROUTING ! -s 224.0.0.0/4 -t mangle \ > -j PKTTYPE --to-pkt-type unicast > > Given the following arptables rule-set: > > arptables -I OUTPUT -o eth0 -j mcmangle --h-length 6 > \ --mc-mangle-mac 01:00:5e:00:01:01 --mc-mangle-dev eth0 > arptables -I INPUT --h-length 6 --destination-mac 01:00:5e:00:01:01 > \ -j mangle --mangle-mac-d 00:zz:yy:xx:5a:27 > > See arptables mcmangle target for further information. That one refers to this patch :) So you're actually communicating using TCP and multicast? Why don't you use UDP, which works fine using multicast without pkttype mangling?