From: James Chapman <jchapman@katalix•com>
To: "Toralf Förster" <toralf.foerster@gmx•de>
Cc: netdev@vger•kernel.org
Subject: Re: malformed captured packets
Date: Wed, 29 Aug 2007 08:35:24 +0100 [thread overview]
Message-ID: <46D521BC.1050300@katalix.com> (raw)
In-Reply-To: <200708281811.34074.toralf.foerster@gmx.de>
Toralf Förster wrote:
> I use at home an DSL connection (stable Gentoo system),
> current kernel is 2.6.22-gentoo-r5.
>
> I attached 2 pcap files with the communication of the KDE program kscd with the
> CDDB server freedb.org, sniffed from interface ppp0 and eth0 respectively.
>
> The sniffed network stream over the ppp0 interface looks _always_ fine whereas
> the sniffed packets from the eth0 always looks bad :-(
>
> 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 content of the CD.
> And I'm really confused about the fact, that within a LAN I did not have a
> malformed packet.
>
> I discussed it
> here http://www.wireshark.org/lists/wireshark-users/200707/msg00187.html
> and here http://bugzilla.kernel.org/show_bug.cgi?id=8793 and many different
> places in the past but w/o success.
>
> Any explanation are appreciated.
Can you provide more information about the problem, please? Are you
using a simple DSL modem with PPPoE, such that the ppp0 interface is
that of the pppd started by a local PPPoE server? Is this a problem only
with packet capture or are you seeing actual data corruption? Did this
work with previous kernels? What is the network topology related to the
DSL interface?
--
James Chapman
Katalix Systems Ltd
http://www.katalix.com
Catalysts for your Embedded Linux software development
next parent reply other threads:[~2007-08-29 7:35 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200708281811.34074.toralf.foerster@gmx.de>
2007-08-29 7:35 ` James Chapman [this message]
2007-08-29 16:22 ` malformed captured packets Toralf Förster
2007-08-30 9:51 ` James Chapman
2007-08-31 7:36 ` Toralf Förster
2007-08-31 9:06 ` [0/7] [PPP]: Fix shared/cloned/non-linear skb bugs (was: malformed captured packets) Herbert Xu
2007-08-31 9:11 ` [PATCH 1/7] [PPP] pppoe: Fix skb_unshare_check call position Herbert Xu
2007-08-31 9:11 ` [PATCH 2/7] [PPP] pppoe: Fix data clobbering in __pppoe_xmit and return value Herbert Xu
2007-08-31 9:11 ` [PATCH 3/7] [PPP] pppoe: Fill in header directly in __pppoe_xmit Herbert Xu
2007-08-31 9:11 ` [PATCH 4/7] [BRIDGE]: Kill clone argument to br_flood_* Herbert Xu
2007-08-31 9:11 ` [PATCH 5/7] [NET] skbuff: Add skb_cow_head Herbert Xu
2007-08-31 9:11 ` [PATCH 6/7] [PPP] generic: Call skb_cow_head before scribbling over skb Herbert Xu
2007-08-31 9:11 ` [PATCH 7/7] [PPP] generic: Fix receive path data clobbering & non-linear handling Herbert Xu
2007-08-31 14:02 ` [0/7] [PPP]: Fix shared/cloned/non-linear skb bugs (was: malformed captured packets) Toralf Förster
2007-09-03 9:32 ` Toralf Förster
2007-09-11 18:12 ` Toralf Förster
2007-09-19 11:51 ` Herbert Xu
[not found] ` <E1IR2Uj-0007MU-00@gondolin.me.apana.org.au>
2007-09-16 23:19 ` [PATCH 1/7] [PPP] pppoe: Fix skb_unshare_check call position David Miller
[not found] ` <E1IR2Uy-0007Ms-00@gondolin.me.apana.org.au>
2007-09-16 23:20 ` [PATCH 2/7] [PPP] pppoe: Fix data clobbering in __pppoe_xmit and return value David Miller
[not found] ` <E1IR2V6-0007N6-00@gondolin.me.apana.org.au>
2007-09-16 23:20 ` [PATCH 3/7] [PPP] pppoe: Fill in header directly in __pppoe_xmit David Miller
[not found] ` <E1IR2V8-0007NE-00@gondolin.me.apana.org.au>
2007-09-16 23:21 ` [PATCH 4/7] [BRIDGE]: Kill clone argument to br_flood_* David Miller
[not found] ` <E1IR2V9-0007NM-00@gondolin.me.apana.org.au>
2007-09-16 23:21 ` [PATCH 5/7] [NET] skbuff: Add skb_cow_head David Miller
[not found] ` <E1IR2VA-0007NU-00@gondolin.me.apana.org.au>
2007-09-16 23:21 ` [PATCH 6/7] [PPP] generic: Call skb_cow_head before scribbling over skb David Miller
[not found] ` <E1IR2VB-0007Nc-00@gondolin.me.apana.org.au>
2007-09-16 23:22 ` [PATCH 7/7] [PPP] generic: Fix receive path data clobbering & non-linear handling David Miller
2007-09-18 12:04 ` [0/3] [PPP]: Fix pppol2tp skb bugs Herbert Xu
2007-09-18 12:08 ` [PATCH 1/3] [PPP] L2TP: Disallow non-UDP datagram sockets Herbert Xu
2007-09-18 12:08 ` [PATCH 2/3] [PPP] L2TP: Fix skb handling in pppol2tp_recv_core Herbert Xu
2007-09-18 12:08 ` [PATCH 3/3] [PPP] L2TP: Fix skb handling in pppol2tp_xmit Herbert Xu
[not found] ` <E1IXbqW-0002OB-00@gondolin.me.apana.org.au>
2007-09-18 20:16 ` [PATCH 1/3] [PPP] L2TP: Disallow non-UDP datagram sockets James Chapman
[not found] ` <E1IXbqo-0002OW-00@gondolin.me.apana.org.au>
2007-09-18 20:17 ` [PATCH 2/3] [PPP] L2TP: Fix skb handling in pppol2tp_recv_core James Chapman
2007-09-18 20:17 ` [0/3] [PPP]: Fix pppol2tp skb bugs David Miller
[not found] ` <E1IXbqs-0002Od-00@gondolin.me.apana.org.au>
2007-09-18 20:19 ` [PATCH 3/3] [PPP] L2TP: Fix skb handling in pppol2tp_xmit James Chapman
2007-09-18 20:32 ` David Miller
2007-09-19 1:30 ` Herbert Xu
2007-09-19 17:45 ` David Miller
2007-09-19 23:11 ` Adrian Bunk
2007-09-19 23:12 ` David Miller
2007-09-19 1:25 ` Herbert Xu
2007-09-19 8:43 ` James Chapman
2007-09-19 8:51 ` Herbert Xu
2007-09-19 17:47 ` David Miller
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