From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267701AbUHZGjS (ORCPT ); Thu, 26 Aug 2004 02:39:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267702AbUHZGjS (ORCPT ); Thu, 26 Aug 2004 02:39:18 -0400 Received: from acheron.informatik.uni-muenchen.de ([129.187.214.135]:33412 "EHLO acheron.informatik.uni-muenchen.de") by vger.kernel.org with ESMTP id S267701AbUHZGjM (ORCPT ); Thu, 26 Aug 2004 02:39:12 -0400 Message-ID: <412D858E.10404@bio.ifi.lmu.de> Date: Thu, 26 Aug 2004 08:39:10 +0200 From: Frank Steiner User-Agent: Mozilla Thunderbird 0.6 (X11/20040503) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Mark Broadbent Cc: Kernel Mailing List Subject: Re: 2.6.8.1: ip auto-config accepts wrong packages References: <412C5E80.8050603@bio.ifi.lmu.de> <1093439062.25506.12.camel@mbpc.signal.qinetiq.com> <412CA518.7090109@bio.ifi.lmu.de> <1093448839.25506.57.camel@mbpc.signal.qinetiq.com> In-Reply-To: <1093448839.25506.57.camel@mbpc.signal.qinetiq.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Mark, Mark Broadbent wrote: > Stupid question but the MAC addresses on the cards are different aren't > they? Could you also double check that the xid values differ on both > machines, this is shown on the line: > > IP-Config: eth0 UP (able=1, xid=07196018) > ^^^^^^^^ > > Both MAC and xid should be different. obiously, the problem is here. The xid is the same on 5 different hosts I tested with the debugging-enabled kernel. Looking it ipconfig.c I now understand that with several hosts using the same xid it must go wrong. I'm currently compiling a new kernel with debugging enabled in rancom.c to see what's going wrong here. Looks like random_bytes is returning the same value on all hosts :-( Can anyone else maybe do a quick check with "ip=dhcp" on two hosts just to see if the problem with the identical xids just show up here? I will send the result of the debugging output from random.c. cu, Frank -- Dipl.-Inform. Frank Steiner Web: http://www.bio.ifi.lmu.de/~steiner/ Lehrstuhl f. Bioinformatik Mail: http://www.bio.ifi.lmu.de/~steiner/m/ LMU, Amalienstr. 17 Phone: +49 89 2180-4049 80333 Muenchen, Germany Fax: +49 89 2180-99-4049