From owner-freebsd-stable Wed May 29 10:23:16 2002 Delivered-To: freebsd-stable@freebsd.org Received: from mailsrv.otenet.gr (mailsrv.otenet.gr [195.170.0.5]) by hub.freebsd.org (Postfix) with ESMTP id 8770F37BE50 for ; Wed, 29 May 2002 10:04:19 -0700 (PDT) Received: from hades.hell.gr (patr530-b149.otenet.gr [212.205.244.157]) by mailsrv.otenet.gr (8.12.3/8.12.3) with ESMTP id g4TH2d0j014383; Wed, 29 May 2002 20:02:40 +0300 (EEST) Received: from hades.hell.gr (hades [127.0.0.1]) by hades.hell.gr (8.12.3/8.12.3) with ESMTP id g4TH2OQf020152; Wed, 29 May 2002 20:02:39 +0300 (EEST) (envelope-from keramida@ceid.upatras.gr) Received: (from charon@localhost) by hades.hell.gr (8.12.3/8.12.3/Submit) id g4TEcicO003829; Wed, 29 May 2002 17:38:44 +0300 (EEST) (envelope-from keramida@ceid.upatras.gr) Date: Wed, 29 May 2002 17:38:43 +0300 From: Giorgos Keramidas To: Archie Cobbs Cc: cseg@storming.org, stable@freebsd.org Subject: Re: Bad TCP checksum Message-ID: <20020529143843.GB2272@hades.hell.gr> References: <20020523081803.GA1730@torment.storming.org> <200205290100.g4T10MX89078@arch20m.dellroad.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200205290100.g4T10MX89078@arch20m.dellroad.org> User-Agent: Mutt/1.3.99i Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG [Please do not cross post; -stable is fine for this thread.] On 2002-05-28 18:00, Archie Cobbs wrote: > Fred Souza writes: > > Here's a piece of the output of tcpdump: > > > > 19:16:55.759657 me.50441 > somehost.http: S [bad tcp cksum fffe!] > > 2079216431:2079216431(0) win 65535 > timestamp 797082 0> (DF) [tos 0x10] (ttl 96, id 41580, len 60) > > Sounds like it might be the delayed checksum code. What Ethernet > device driver are you using? Or like a kernel/userland compiled with excessive optimizations. What are your CFLAGS and COPTFLAGS in /etc/make.conf ? -- Giorgos Keramidas - http://www.FreeBSD.org keramida@FreeBSD.org - The Power to Serve To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message