From owner-freebsd-net@FreeBSD.ORG Wed Jan 31 21:11:32 2007 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7D36216A402; Wed, 31 Jan 2007 21:11:32 +0000 (UTC) (envelope-from cedric@decemplex.net) Received: from mail.decemplex.net (mail.decemplex.net [80.237.247.202]) by mx1.freebsd.org (Postfix) with ESMTP id 3C19713C491; Wed, 31 Jan 2007 21:11:32 +0000 (UTC) (envelope-from cedric@decemplex.net) Received: from localhost (mail.decemplex.net [80.237.247.202]) by mail.decemplex.net (Postfix) with ESMTP id 0FA3C7D1649; Wed, 31 Jan 2007 21:47:15 +0100 (CET) X-Virus-Scanned: amavisd-new at decemplex.net Received: from mail.decemplex.net ([80.237.247.202]) by localhost (mail.decemplex.net [80.237.247.202]) (amavisd-new, port 10024) with LMTP id LiO7LEWQv003; Wed, 31 Jan 2007 21:47:14 +0100 (CET) Received: from decemplex.loc (83-178-112-217.dyn.adsl.belcenter.be [217.112.178.83]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.decemplex.net (Postfix) with ESMTP id 6C7B47D13E0; Wed, 31 Jan 2007 21:47:14 +0100 (CET) Date: Wed, 31 Jan 2007 21:47:05 +0100 From: =?ISO-8859-1?Q?C=E9dric?= Jonas To: freebsd-net@freebsd.org Message-ID: <20070131214705.0ee0ba67@ganymed> X-Mailer: Claws Mail 2.7.1 (GTK+ 2.10.9; i386-portbld-freebsd7.0) Mime-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_GiTGV60xmr1k/UmjqFIRHoW"; protocol="application/pgp-signature"; micalg=PGP-SHA1 Cc: freebsd-current@freebsd.org Subject: fxp(4) checksum (offloading?) errors X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Jan 2007 21:11:32 -0000 --Sig_GiTGV60xmr1k/UmjqFIRHoW Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi, I get TCP/UDP checksum errors with fxp(4). I noticed it after using Wireshark today: Checksum: 0xac18 [incorrect, should be 0xfbc7 (maybe caused by checksum offloading?)] for example. If I understand it more or less correctly, checksum offloading is performed by or with help of the NIC - only for TCP and UDP, where the checksum fails exactly... I didn't found a way to disable it, so I assume it's a bug in the driver... I don't know exactly which infos I must provide additionally to the following, so don't hesitate to ask more :) Used NIC: fxp0: port 0xa400-0xa43f mem 0xfb030000-0xfb030fff,0xfb000000-0xfb01ffff irq 16 at device 7.0 on pci2 Used system: FreeBSD ganymed 7.0-CURRENT FreeBSD 7.0-CURRENT #0: Sun Jan 21 16:07:51 CET 2007 root@ganymed:/usr/obj/usr/src/sys/GANYMED i386 --=20 C=E9dric Jonas cedric@decemplex.net GPG ID: 30CCFE8D GPG Key: http://box.decemplex.net/~cedric/cedric.key.asc GPG Fingerprint: CF03 E1FD 9428 1B6B E971 B107 9044 AA99 30CC FE8D Jabber-ID: cedric@decemplex.net --Sig_GiTGV60xmr1k/UmjqFIRHoW Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFwQBQkESqmTDM/o0RAkDdAKCCMGwdc+EMl/hhXTIOwW46w+zPBACfZrG+ 8zc1WUK4mH6T/gJR4yfetm0= =W8o8 -----END PGP SIGNATURE----- --Sig_GiTGV60xmr1k/UmjqFIRHoW--