From owner-freebsd-net@FreeBSD.ORG Wed Dec 22 21:28:30 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 23C2E16A4CE; Wed, 22 Dec 2004 21:28:30 +0000 (GMT) Received: from smtpout.mac.com (smtpout.mac.com [17.250.248.88]) by mx1.FreeBSD.org (Postfix) with ESMTP id 05C9143D1D; Wed, 22 Dec 2004 21:28:30 +0000 (GMT) (envelope-from justin@mac.com) Received: from mac.com (smtpin02-en2 [10.13.10.147]) by smtpout.mac.com (Xserve/MantshX 2.0) with ESMTP id iBMLSTuR015337; Wed, 22 Dec 2004 13:28:29 -0800 (PST) Received: from [24.6.153.138] (c-24-6-153-138.client.comcast.net [24.6.153.138]) (authenticated bits=0) by mac.com (Xserve/smtpin02/MantshX 4.0) with ESMTP id iBMLSROR009054 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NO); Wed, 22 Dec 2004 13:28:29 -0800 (PST) In-Reply-To: <41C9E437.5040309@freebsd.org> References: <00CDF9AA240E204FA6E923BD35BC643607C4803C@bcs-mail.internal.cacheflow.com> <41C9E437.5040309@freebsd.org> Mime-Version: 1.0 (Apple Message framework v619) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <6A79A3D3-5460-11D9-99AD-00306544D642@mac.com> Content-Transfer-Encoding: 7bit From: Justin Walker Date: Wed, 22 Dec 2004 13:28:26 -0800 To: freebsd-net@freebsd.org X-Mailer: Apple Mail (2.619) cc: freebsd-current@freebsd.org Subject: Re: TCP URG point X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 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, 22 Dec 2004 21:28:30 -0000 On Dec 22, 2004, at 13:16, Andre Oppermann wrote: > Li, Qing wrote: >> It appears the TCP urgent pointer is off by 1. >> In RFC-1122, section 4.2.2.4 on Page 83 describes the >> urgent pointer error in RFC-793. >> The 6.0-CURRENT code has the urgent pointer set >> to (LAST+1). >> Any comments before I sent a PR ? > > No, please do and send me the PR number. It may be well-known here, but this is a long-standing issue. It's been around since 4.2 days. Cf. the discussions in Stevens's UNPv12e (p. 566) and TCP/IP Illustrated, v1 (p 292-296). It may be impolitic to change this :=} Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | "Weaseling out of things is what | separates us from the animals. | Well, except the weasel." | - Homer J Simpson *--------------------------------------*-------------------------------*