From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261851AbUCaIk6 (ORCPT ); Wed, 31 Mar 2004 03:40:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261852AbUCaIk6 (ORCPT ); Wed, 31 Mar 2004 03:40:58 -0500 Received: from ASte-Genev-Bois-101-1-4-241.w217-128.abo.wanadoo.fr ([217.128.44.241]:15112 "EHLO slartibartfast.qube.net") by vger.kernel.org with ESMTP id S261851AbUCaIk5 (ORCPT ); Wed, 31 Mar 2004 03:40:57 -0500 Date: Wed, 31 Mar 2004 10:40:53 +0200 From: Ignacy Gawedzki To: linux-kernel@vger.kernel.org Cc: David Stevens , USAGI users Subject: Re: (usagi-users 02870) Re: IPv6 multicast in 2.4.25 broken? Message-ID: <20040331084053.GA25253@zenon.mine.nu> Mail-Followup-To: Ignacy Gawedzki , linux-kernel@vger.kernel.org, David Stevens , USAGI users References: <20040324185243.GB27409@zenon.mine.nu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 30, 2004 at 01:47:06PM -0800, thus spake David Stevens: > Can you reproduce this in a small test program and send me > the source? Also, the contents of /dev/proc/igmp6 and any > arguments you ran the program with would be helpful. Not at this time, as I would have to reinstall a 2.4.25 kernel. But I plan to do the testing soon. > At first I thought it might be that you have an MLD-snooping > switch that doesn't understand MLDv2 packets, but ff02::1 is > the all-nodes address which all hosts join, and which is not > advertised at all. That should work if you're receiving any > multicasts at all. Well, I see those packets with tcpdump on both the sending and receiving interfaces, so no ethernet equipment is involved. Moreover, the same code works perfectly on 2.4.24, which should indicate that there are some changes between the two (more precisely between 2.4.24 and 2.4.25-pre4) that break something. Somehow the multicast packets are received but not relayed to the socket... -- "The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell