From owner-freebsd-net@FreeBSD.ORG Wed Apr 27 15:58:43 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2D300106564A for ; Wed, 27 Apr 2011 15:58:43 +0000 (UTC) (envelope-from ticso@cicely7.cicely.de) Received: from raven.bwct.de (raven.bwct.de [85.159.14.73]) by mx1.freebsd.org (Postfix) with ESMTP id 964F98FC13 for ; Wed, 27 Apr 2011 15:58:42 +0000 (UTC) Received: from mail.cicely.de ([10.1.1.37]) by raven.bwct.de (8.13.4/8.13.4) with ESMTP id p3RFwfHo020281 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 27 Apr 2011 17:58:41 +0200 (CEST) (envelope-from ticso@cicely7.cicely.de) Received: from cicely7.cicely.de (cicely7.cicely.de [10.1.1.9]) by mail.cicely.de (8.14.4/8.14.4) with ESMTP id p3RFwcbZ001783 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 27 Apr 2011 17:58:38 +0200 (CEST) (envelope-from ticso@cicely7.cicely.de) Received: from cicely7.cicely.de (localhost [127.0.0.1]) by cicely7.cicely.de (8.14.2/8.14.2) with ESMTP id p3RFwcd6009311; Wed, 27 Apr 2011 17:58:38 +0200 (CEST) (envelope-from ticso@cicely7.cicely.de) Received: (from ticso@localhost) by cicely7.cicely.de (8.14.2/8.14.2/Submit) id p3RFwcAi009310; Wed, 27 Apr 2011 17:58:38 +0200 (CEST) (envelope-from ticso) Date: Wed, 27 Apr 2011 17:58:38 +0200 From: Bernd Walter To: freebsd-net@freebsd.org Message-ID: <20110427155838.GI3101@cicely7.cicely.de> References: <20110427153235.GH3101@cicely7.cicely.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110427153235.GH3101@cicely7.cicely.de> X-Operating-System: FreeBSD cicely7.cicely.de 7.0-STABLE i386 User-Agent: Mutt/1.5.11 X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED=-1, BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01 autolearn=ham version=3.3.0 X-Spam-Checker-Version: SpamAssassin 3.3.0 (2010-01-18) on spamd.cicely.de Cc: Bernd Walter Subject: Re: Multicast questions X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: ticso@cicely.de List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Apr 2011 15:58:43 -0000 On Wed, Apr 27, 2011 at 05:32:36PM +0200, Bernd Walter wrote: > I have some strange problems with multicast. > Tested host is running FreeBSD 8.1-RELEASE. > System is a jailed environment. > > Outside of the jail I can start a multicast reader: > [54]host# mcastread -v6 lo0 ff35::fe00:1 5356 > mcastread: trying ff35::fe00:1 > mcastread: using ff35::fe00:1 > > Inside the jail however it fails on binding to the address: > [85]jail# mcastread -v6 lo0 ff35::fe00:1 5356 > mcastread: trying ff35::fe00:1 > mcastread: bind: Can't assign requested address > mcastread: can't allocate socket Ok - adding the multicast-IP to the jail list helps. This leaves the interface problem. > Is there any workaround for this problem? > I've read about vimage, but I would like to live without it. > > Sending to the multicast group works more or less: > [94]jail# echo test | mcastsend ff35::fe00:1 5356 > mcastsend: send: No route to host > Exit 1 > [95]jail# echo test | mcastsend -i lo0 ff35::fe00:1 5356 > The last one is received with the reader running on the host. > But why do I get a no route to host error without using an > interface for a site local address? > > With the only anycast address configured to lo0 using another interface > fails inside the jail: > [99]jail# echo test | mcastsend -i em0 ff35::fe00:1 5356 > mcastsend: Failed to bind source address. > Exit 1 > Do I really need to configure the address to the LAN interface? > > -- > B.Walter http://www.bwct.de > Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm. -- B.Walter http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.