From owner-freebsd-hackers@FreeBSD.ORG Fri Jan 9 08:02:52 2004 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 4A96416A4CE for ; Fri, 9 Jan 2004 08:02:52 -0800 (PST) Received: from stud.alakhawayn.ma (stud.alakhawayn.ma [193.194.63.94]) by mx1.FreeBSD.org (Postfix) with ESMTP id C6D7943D41 for ; Fri, 9 Jan 2004 08:02:49 -0800 (PST) (envelope-from 001VA36979@stud.alakhawayn.ma) Received: from localhost (001VA36979@localhost) by stud.alakhawayn.ma (8.9.0/8.9.1) with SMTP id PAA16994 for ; Fri, 9 Jan 2004 15:57:07 GMT Date: Fri, 9 Jan 2004 15:57:07 +0000 (GMT) From: YACINE GHANJAOUI <001VA36979@stud.alakhawayn.ma> To: freebsd-hackers@freebsd.org In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: Re: freebsd-hackers Digest, Vol 42, Issue 6 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Jan 2004 16:02:52 -0000 Hi, when trying to intercept UDP packet after changing the protocol number from 17 to a user one (99) in the ip_input.c file. when trying to regenrate the packet after inserting some bit errors an error message appears in the reciever telling that The udp checksum is incorrect even if i just change the ip Header. What do you think the problem is? Thanks in Advance,