From owner-freebsd-net@FreeBSD.ORG Mon Dec 15 17:01:59 2003 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 730D716A4CE for ; Mon, 15 Dec 2003 17:01:59 -0800 (PST) Received: from mx.force10networks.com (corp.force10networks.com [206.54.51.125]) by mx1.FreeBSD.org (Postfix) with ESMTP id 620EA43D36 for ; Mon, 15 Dec 2003 17:01:56 -0800 (PST) (envelope-from satyam@force10networks.com) X-MimeOLE: Produced By Microsoft Exchange V6.0.6249.0 content-class: urn:content-classes:message MIME-Version: 1.0 Date: Mon, 15 Dec 2003 15:01:59 -0800 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: IP checksum question Thread-Index: AcPDX3GSJZa2CtZ9Qqmc82DCFxpmqg== From: "Satyam Kurapati" To: Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.1 Subject: IP checksum question 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: Tue, 16 Dec 2003 01:01:59 -0000 Hi, What is the reason for zeroing out the IP checksum in IP input packet processing, after validating ? If I leave it as it is, will there be any problems in the upper layers or in the IP forward paths ? Thanks in advance! /Satyam Satyam Kurapati Force10 Networks Inc.