From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750821AbWD3Nb5 (ORCPT ); Sun, 30 Apr 2006 09:31:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751076AbWD3Nb5 (ORCPT ); Sun, 30 Apr 2006 09:31:57 -0400 Received: from mxfep02.bredband.com ([195.54.107.73]:14984 "EHLO mxfep02.bredband.com") by vger.kernel.org with ESMTP id S1750821AbWD3Nb5 (ORCPT ); Sun, 30 Apr 2006 09:31:57 -0400 From: "Niklas Fondberg" To: Subject: IGMP unsolicited count don't work in 2.4.30? Date: Sun, 30 Apr 2006 15:31:50 +0200 Message-ID: <006001c66c5a$6f9574c0$a901a8c0@NIFHP6220> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 Thread-Index: AcZsWm9s52LMo4WkRoevB32+gPhWRQ== Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I'm posting to the list because we are using Linux in different IPTV Set top boxes. I have two questions (the fist is possibly a bug); 1. Up to at least version 2.4.22 we see that after an initial membership report (IGMP join) two more reports are sent, with an interval of around 500ms. This is very good and true to the specification (IGMP v2 rfc2236 at least). However version 2.4.30 sends only one membership report and this causes problems with some switches. IGMP_Unsolicited_Report_Count is defined to 2 but if igmp_mod_timer is called (on a igmp_query?) it is reset so the loop of adding the 2 more reports are never done. This is just a hunch but our tests show that we never get more than 1 report. Anybody know if this is a bug? 2. Every membership report is put in a timer (igmp_start_timer) with a max_delay. The max delay of the first report is 1 (IGMP_Initial_Report_Delay) so the value net_random returns will be the earliest the first report is sent. Would it break the implementation if the first membership report is sent right away without being put in a timer queue? (I'm not subscribed to the list so please CC me in the reply) Niklas Fondberg