Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261194AbVDYVBp (ORCPT ); Mon, 25 Apr 2005 17:01:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261196AbVDYVBp (ORCPT ); Mon, 25 Apr 2005 17:01:45 -0400 Received: from netcore.fi ([193.94.160.1]:8925 "EHLO netcore.fi") by vger.kernel.org with ESMTP id S261194AbVDYVBK (ORCPT ); Mon, 25 Apr 2005 17:01:10 -0400 Date: Tue, 26 Apr 2005 00:00:46 +0300 (EEST) From: Pekka Savola To: Felix von Leitner cc: "YOSHIFUJI Hideaki / ?$B5HF#1QL@" , linux-kernel@vger.kernel.org, netdev@oss.sgi.com Subject: Re: IPv6 has trouble assigning an interface In-Reply-To: <20050425195736.GB3123@codeblau.de> Message-ID: References: <20050311202122.GA13205@fefe.de> <20050311173308.7a076e8f.akpm@osdl.org> <20050324.205902.119922975.yoshfuji@linux-ipv6.org> <20050425195736.GB3123@codeblau.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1450 Lines: 27 On Mon, 25 Apr 2005, Felix von Leitner wrote: > Here is an strace of some piece of code of mine: > > socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP) = 3 > setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [12884901889], 4) = 0 > bind(3, {sa_family=AF_INET6, sin6_port=htons(8002), inet_pton(AF_INET6, "::", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0 > setsockopt(3, SOL_IPV6, IPV6_MULTICAST_LOOP, "\1", 1) = 0 > [...] > sendto(3, "ncp-lowfat-1.2.2", 16, 0, {sa_family=AF_INET6, sin6_port=htons(8002), inet_pton(AF_INET6, "ff02::6e63:7030", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = -1 EADDRNOTAVAIL (Cannot assign requested address) > > ff02 is a link-local multicast address. I've bound to ::. How can this > fail? link-local should always work, even if no routes are set and no > router has been found. Umm.. link-local unicast and multicast both require that you specify the interface, because otherwise it's ambiguous -- how could the kernel know which interface should be used to send the packet? -- Pekka Savola "You each name yourselves king, yet the Netcore Oy kingdom bleeds." Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/