Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751845AbWIRRBk (ORCPT ); Mon, 18 Sep 2006 13:01:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751849AbWIRRBk (ORCPT ); Mon, 18 Sep 2006 13:01:40 -0400 Received: from smarthost1.sentex.ca ([64.7.153.18]:45562 "EHLO smarthost1.sentex.ca") by vger.kernel.org with ESMTP id S1751845AbWIRRBj (ORCPT ); Mon, 18 Sep 2006 13:01:39 -0400 From: "Stuart MacDonald" To: "'Michael Kerrisk'" , "'Andi Kleen'" Cc: Subject: RE: TCP stack behaviour question Date: Mon, 18 Sep 2006 13:01:20 -0400 Organization: Connect Tech Inc. Message-ID: <005501c6db44$102b73a0$294b82ce@stuartm> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: <20060918153837.263210@gmx.net> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1508 Lines: 43 From: Michael Kerrisk [mailto:mtk-manpages@gmx.net] > Von: Andi Kleen > > On Monday 18 September 2006 16:19, Stuart MacDonald wrote: > > > From: Andi Kleen [mailto:ak@suse.de] > > > > > # man 7 ip > > > > > .. > > > > > Note that TCP has no error queue; > MSG_ERRQUEUE is > > > > > illegal on SOCK_STREAM sockets. Thus all errors are > returned by > > > > > socket function return or SO_ERROR only. > > > > > > > > > > Maybe the man page is wrong? That's from my FC 3 install. > > > > > > > > The sentence is correct, but TCP has a IP_RECVERR that works > > > > differently without a queue. Basically it doesn't delay > the error > > > > reporting for incoming ICMPs to the last retransmit, but reports > > > > them immediately. This is documented in tcp(7) > > > > > > I read that too, but didn't know which one was correct, > so I erred on > > > the side of caution and believed ip(7). > > > > Ok maybe it's a bit misleading. Michael, you might want to clarify. > > Can some one of you propose a better text please? Perhaps Note that TCP has no error queue; MSG_ERRQUEUE is illegal on SOCK_STREAM sockets. IP_RECVERR is valid for TCP, but all errors are returned by socket function return or SO_ERROR only. ? ..Stu - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/