From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Dykstra Subject: Re: [PATCH] ipv4/ipv6: check hop limit field on input Date: Tue, 02 Jun 2009 09:22:10 +0000 Message-ID: <1243934530.8439.4.camel@Maple> References: <4A242161.3010609@cosmosbay.com> <4A242418.1090804@hp.com> <1243907646.15854.16.camel@merlyn> <20090601.190228.75178984.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: brian.haley@hp.com, dada1@cosmosbay.com, nicolas.dichtel@6wind.com, fw@strlen.de, netdev@vger.kernel.org To: David Miller Return-path: Received: from an-out-0708.google.com ([209.85.132.248]:51191 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752941AbZFBJ2T (ORCPT ); Tue, 2 Jun 2009 05:28:19 -0400 Received: by an-out-0708.google.com with SMTP id d40so16710319and.1 for ; Tue, 02 Jun 2009 02:28:19 -0700 (PDT) In-Reply-To: <20090601.190228.75178984.davem@davemloft.net> Sender: netdev-owner@vger.kernel.org List-ID: On Mon, 2009-06-01 at 19:02 -0700, David Miller wrote: > And I even remember there are applications that use multicast and > a hop limit of zero explicitly to keep application traffic only on > the local subnet. So any change like that proposed could break > things. Are you thinking of multicast apps that explicitly set a hop limit, or Multicast Listener Discovery? The hop limit specified for MLDv2 messages is one, not zero. -- John