From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Chapman Subject: Re: malformed captured packets Date: Wed, 29 Aug 2007 08:35:24 +0100 Message-ID: <46D521BC.1050300@katalix.com> References: <200708281811.34074.toralf.foerster@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org To: =?ISO-8859-1?Q?Toralf_F=F6rster?= Return-path: Received: from s36.avahost.net ([74.53.95.194]:41510 "EHLO s36.avahost.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751092AbXH2Hf1 (ORCPT ); Wed, 29 Aug 2007 03:35:27 -0400 In-Reply-To: <200708281811.34074.toralf.foerster@gmx.de> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Toralf F=F6rster wrote: > I use at home an DSL connection (stable Gentoo system), > current kernel is 2.6.22-gentoo-r5. >=20 > I attached 2 pcap files with the communication of the KDE program ksc= d with the > CDDB server freedb.org, sniffed from interface ppp0 and eth0 respecti= vely. >=20 > The sniffed network stream over the ppp0 interface looks _always_ fin= e whereas > the sniffed packets from the eth0 always looks bad :-( >=20 > I don't undestand why the ppp0 stream is ok, whereas the eth0 stream = has always > a malformed package (eg #13 in kscd_eth0.pcap) which contains the con= tent of the CD. > And I'm really confused about the fact, that within a LAN I did not h= ave a > malformed packet. >=20 > I discussed it > here http://www.wireshark.org/lists/wireshark-users/200707/msg00187.h= tml > and here http://bugzilla.kernel.org/show_bug.cgi?id=3D8793 and many d= ifferent > places in the past but w/o success. >=20 > Any explanation are appreciated. Can you provide more information about the problem, please? Are you=20 using a simple DSL modem with PPPoE, such that the ppp0 interface is=20 that of the pppd started by a local PPPoE server? Is this a problem onl= y=20 with packet capture or are you seeing actual data corruption? Did this=20 work with previous kernels? What is the network topology related to the= =20 DSL interface? --=20 James Chapman Katalix Systems Ltd http://www.katalix.com Catalysts for your Embedded Linux software development