From owner-freebsd-hackers Sat Jun 9 9:55:42 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from smtp10.atl.mindspring.net (smtp10.atl.mindspring.net [207.69.200.246]) by hub.freebsd.org (Postfix) with ESMTP id 8A09F37B405; Sat, 9 Jun 2001 09:55:37 -0700 (PDT) (envelope-from tlambert2@mindspring.com) Received: from mindspring.com (dialup-209.245.133.57.Dial1.SanJose1.Level3.net [209.245.133.57]) by smtp10.atl.mindspring.net (8.9.3/8.8.5) with ESMTP id MAA02414; Sat, 9 Jun 2001 12:55:35 -0400 (EDT) Message-ID: <3B225525.8C4695D@mindspring.com> Date: Sat, 09 Jun 2001 09:56:05 -0700 From: Terry Lambert Reply-To: tlambert2@mindspring.com X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Assar Westerlund Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: How to disable software TCP checksumming? References: <20010529144114.I19771@luke.immure.com> <20010529221107.C49875@skriver.dk> <20010529155212.M19771@luke.immure.com> <20010530045200.A1031@hades.hell.gr> <20010529235215.A60177@luke.immure.com> <20010530085155.B24096@Odin.AC.HMC.Edu> <200105310204.f4V248n15260@whizzo.transsys.com> <200106070549.WAA06248@windsor.research.att.com> <3B208F11.87722148@mindspring.com> <5lk82ntb0o.fsf@assaris.sics.se> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Assar Westerlund wrote: > > Terry Lambert writes: > > This all came from IP headers being 14 bytes long, instead > > of 16. > > Hu? An IPv4 header (not including options) is 20 bytes long. Sorry; ethernet header. The problem is the 14 bytes making the code unaligned on a 32 or 64 bit boundary... -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message