From owner-freebsd-hackers@FreeBSD.ORG Thu Sep 18 08:30:55 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0D62816A4B3 for ; Thu, 18 Sep 2003 08:30:55 -0700 (PDT) Received: from venom.ai.net (venom.ai.net [205.134.161.156]) by mx1.FreeBSD.org (Postfix) with ESMTP id 249AD43F75 for ; Thu, 18 Sep 2003 08:30:54 -0700 (PDT) (envelope-from deepak@ai.net) Received: from blood (pool-68-163-66-91.res.east.verizon.net [68.163.66.91]) by venom.ai.net (8.12.6/8.12.8) with SMTP id h8IFQ7iI028353; Thu, 18 Sep 2003 11:26:08 -0400 (EDT) (envelope-from deepak@ai.net) From: "Deepak Jain" To: "Colin Percival" , Date: Thu, 18 Sep 2003 11:30:07 -0400 Message-ID: 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 IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4927.1200 In-Reply-To: <5.0.2.1.1.20030917173951.02df29e8@popserver.sfu.ca> Importance: Normal Subject: RE: TCP information X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: deepak@ai.net List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Sep 2003 15:30:55 -0000 > If you've got a small enough amount of traffic, you could use > tcpdump to > snarf the headers and then use your favourite scripting languge > to look for > repeated sequence numbers (retransmits) and repeated acks (lost packets); > but I suspect this would be too slow for most purposes. Yeah, we thought about using a sniffer in front of a box to accomplish the same task to overcome the performance issue, but a more direct way would really be suitable to our application. Thanks! Deepak Jain AiNET