From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick McHardy Subject: Re: accelerated vlan gives pcap tagged packets untagged Date: Mon, 09 Feb 2009 14:39:12 +0100 Message-ID: <49903200.6040408@trash.net> References: <20090208123735.15d9ea4b@mjolnir.drzeus.cx> <49902E35.6060506@trash.net> <20090209143405.76ac6387@mjolnir.drzeus.cx> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Cc: Francois Romieu , netdev@vger.kernel.org To: Pierre Ossman Return-path: Received: from stinky.trash.net ([213.144.137.162]:54979 "EHLO stinky.trash.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754378AbZBINjP (ORCPT ); Mon, 9 Feb 2009 08:39:15 -0500 In-Reply-To: <20090209143405.76ac6387@mjolnir.drzeus.cx> Sender: netdev-owner@vger.kernel.org List-ID: Pierre Ossman wrote: > On Mon, 09 Feb 2009 14:23:01 +0100 > Patrick McHardy wrote: > >> Current kernel version (I think starting with 2.6.28) relay the >> VLAN tag information to userspace through packet sockets. The >> current libpcap release from tcpdump.org (or the one Dave keeps >> in a git tree on kernel.org) supports reconstructing the tags. >> > > Ah. This is a Fedora 10 machine so it's running a 2.6.27 kernel. I'll > see if I can do a test with an updated kernel. > > Do you know if dhcpd also uses libpcap so that it will stop seeing > packets it shouldn't? I believe it depends on compilation options (but usually does on modern distributions).