From owner-freebsd-net@FreeBSD.ORG Wed Sep 21 10:42:50 2005 Return-Path: X-Original-To: freebsd-net@freebsd.org 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 53BFE16A41F; Wed, 21 Sep 2005 10:42:50 +0000 (GMT) (envelope-from lists@wm-access.no) Received: from lakepoint.domeneshop.no (lakepoint.domeneshop.no [194.63.248.54]) by mx1.FreeBSD.org (Postfix) with ESMTP id B4AD243D45; Wed, 21 Sep 2005 10:42:49 +0000 (GMT) (envelope-from lists@wm-access.no) Received: from [192.168.9.8] (14.80-203-184.nextgentel.com [80.203.184.14]) (authenticated bits=0) by lakepoint.domeneshop.no (8.13.4/8.13.4) with ESMTP id j8LAgjam031996; Wed, 21 Sep 2005 12:42:47 +0200 Message-ID: <43313924.9050009@wm-access.no> Date: Wed, 21 Sep 2005 12:42:44 +0200 From: =?ISO-8859-1?Q?Sten_Daniel_S=F8rsdal?= User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Robert Watson References: <20050918212110.61962.qmail@web54501.mail.yahoo.com> <20050920134408.Y34322@fledge.watson.org> In-Reply-To: <20050920134408.Y34322@fledge.watson.org> X-Enigmail-Version: 0.92.0.0 OpenPGP: id=C308A003 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Cc: freebsd-net@freebsd.org, Milscvaer Subject: Re: UDP dont fragment bit X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 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, 21 Sep 2005 10:42:50 -0000 > > For whatever reason, it turns out that you and only you have requested > this feature. For typicaly network debugging applications, a raw socket > is used, which allows the direct frobbing the the IP DF bit. For > example, in traceroute(8). > > Could you tell us a bit more about the application and proposed use? > Presumably forcing the DF bit isn't much use unless you can also > retrieve useful reporting on the ICMP errors associated with needing the > fragment? > I have been looking for such a feature too. My Application; Bandwidth tester (also as a support app for an UDP file transfer utility) The reason i want DF bit removed? I want to be able to generate my own fragments or let the routers generate the fragments. I also want to be able to receive bad UDP packets to gather statistics. This would be userland applications. -- Sten Daniel Sørsdal