From mboxrd@z Thu Jan 1 00:00:00 1970 From: Francois Romieu Subject: Re: Bogus frames transmitted with r8169 & fragmentation & large mtu Date: Thu, 16 Feb 2012 00:23:03 +0100 Message-ID: <20120215232303.GB31463@electric-eye.fr.zoreil.com> References: <20120215163748.GA3998@elliptictech.com> <1329333239.2469.3.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Nick Bowler , netdev@vger.kernel.org, Realtek linux nic maintainers , Hayes Wang To: Eric Dumazet Return-path: Received: from violet.fr.zoreil.com ([92.243.8.30]:56984 "EHLO violet.fr.zoreil.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753457Ab2BOXf3 (ORCPT ); Wed, 15 Feb 2012 18:35:29 -0500 Content-Disposition: inline In-Reply-To: <1329333239.2469.3.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: Eric Dumazet : > Le mercredi 15 f=C3=A9vrier 2012 =C3=A0 11:37 -0500, Nick Bowler a =C3= =A9crit : [...] > > Let me know if you need any more info, >=20 > Interesting, but 2nd frame is also corrupted (not at the start but in > the middle) And the corruption looks like a packet header. Compare : 0000 00 25 11 8c 1c 3d bc ae c5 27 19 6f 08 00 45 00 .%...=3D.. .'.= o..E. 0010 23 24 5d 69 20 00 40 01 46 a5 c0 a8 09 41 c0 a8 #$]i .@. F....= A.. 0020 09 39 08 00 d9 b6 0c 6b 00 01 d1 d2 3b 4f ad 69 .9.....k ....;= O.i 0030 06 00 42 42 42 42 42 42 42 42 42 42 42 42 42 42 ..BBBBBB BBBBB= BBB with : (lots of 42) 1f00 00 25 11 8c 1c 3d bc ae c5 27 19 6f 08 00 45 00 .%...=3D.. .'.= o..E. 1f10 0c 1c 5d 69 0d 26 40 01 70 87 c0 a8 09 41 c0 a8 ..]i.&@. p....= A.. (^^^^^ fragment offset 6694) 1f20 09 39 42 42 42 42 42 42 42 42 42 42 42 42 42 42 .9BBBBBB BBBBB= BBB Mac addresses and ip addresses match. Hayes, what is the story with ICMP packets and IP flags ? --=20 Ueimor