Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261186AbTHSShJ (ORCPT ); Tue, 19 Aug 2003 14:37:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261185AbTHSShI (ORCPT ); Tue, 19 Aug 2003 14:37:08 -0400 Received: from pizda.ninka.net ([216.101.162.242]:35212 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id S273034AbTHSSVw (ORCPT ); Tue, 19 Aug 2003 14:21:52 -0400 Date: Tue, 19 Aug 2003 11:13:58 -0700 From: "David S. Miller" To: Richard Underwood Cc: skraw@ithnet.com, willy@w.ods.org, alan@lxorguk.ukuu.org.uk, carlosev@newipnet.com, lamont@scriptkiddie.org, davidsen@tmr.com, bloemsaa@xs4all.nl, marcelo@conectiva.com.br, netdev@oss.sgi.com, linux-net@vger.kernel.org, layes@loran.com, torvalds@osdl.org, linux-kernel@vger.kernel.org Subject: Re: [2.4 PATCH] bugfix: ARP respond on all devices Message-Id: <20030819111358.35ef1059.davem@redhat.com> In-Reply-To: <353568DCBAE06148B70767C1B1A93E625EAB5E@post.pc.aspectgroup.co.uk> References: <353568DCBAE06148B70767C1B1A93E625EAB5E@post.pc.aspectgroup.co.uk> X-Mailer: Sylpheed version 0.9.2 (GTK+ 1.2.6; sparc-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1257 Lines: 34 On Tue, 19 Aug 2003 19:16:18 +0100 Richard Underwood wrote: > David S. Miller wrote: > > Ok, then how would you propose to be able to send > > packets out an interface _before_ we have addresses > > assigned to it? > > > IP packets you mean? You don't? ;) It would depend on why you're > doing it naturally. Mostly, I'd have thought that if a host doesn't have an > IP number it doesn't get to use ARP. Of course it gets to use ARP, nothing prevents this. If I know that IP X has my configuration information, I have every right to send X a packet from zero-net to ask for that information before I have any IP addresses attached to the interface. This is nothing wrong nor strange about this and we've supported it for years. Also, when one specifies a specific device in an output address and we cannot find the IP part of the address in the routing tables, we still procure a valid route for the requester. Besides normal IP addresses, multicast tools use these facilities. - 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/