From owner-freebsd-net@FreeBSD.ORG Thu Aug 24 22:45:20 2006 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5A66316A4DE for ; Thu, 24 Aug 2006 22:45:20 +0000 (UTC) (envelope-from brooks@lor.one-eyed-alien.net) Received: from sccmmhc91.asp.att.net (sccmmhc91.asp.att.net [204.127.203.211]) by mx1.FreeBSD.org (Postfix) with ESMTP id ADC1943D46 for ; Thu, 24 Aug 2006 22:45:14 +0000 (GMT) (envelope-from brooks@lor.one-eyed-alien.net) Received: from lor.one-eyed-alien.net ([12.207.12.9]) by sccmmhc91.asp.att.net (sccmmhc91) with ESMTP id <20060824224513m9100862f6e>; Thu, 24 Aug 2006 22:45:13 +0000 Received: from lor.one-eyed-alien.net (localhost [127.0.0.1]) by lor.one-eyed-alien.net (8.13.6/8.13.6) with ESMTP id k7OMjAni041010; Thu, 24 Aug 2006 17:45:11 -0500 (CDT) (envelope-from brooks@lor.one-eyed-alien.net) Received: (from brooks@localhost) by lor.one-eyed-alien.net (8.13.6/8.13.6/Submit) id k7OMjAVp041009; Thu, 24 Aug 2006 17:45:10 -0500 (CDT) (envelope-from brooks) Date: Thu, 24 Aug 2006 17:45:09 -0500 From: Brooks Davis To: Chuck Swiger Message-ID: <20060824224509.GD40213@lor.one-eyed-alien.net> References: <44EE1E48.6000006@shapeshifter.se> <44EE23E7.2010800@shapeshifter.se> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="NtwzykIc2mflq5ck" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.11 Cc: freebsd-net@freebsd.org, Fredrik Lindberg Subject: Re: Zeroconfig and Multicast DNS X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Aug 2006 22:45:20 -0000 --NtwzykIc2mflq5ck Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 24, 2006 at 03:21:41PM -0700, Chuck Swiger wrote: > On Aug 24, 2006, at 3:10 PM, Fredrik Lindberg wrote: > >>Queries to 254.169.in-addr.arpa MUST return NXDOMAIN (or RCODE 3, =20 > >>to choose a non-BIND specific term). > > > >We're talking about mDNS here, not DNS. I would argue that because > >mDNS is link-local it makes perfect sense to be able to resolve > >254.169.in-addr.arpa using mDNS. >=20 > True, agreed-- that's in part (b) of what I quoted. The specific =20 > part is: >=20 > "Names that are resolvable only on the local link (such as through =20 > use of > protocols such as Link Local Multicast Name Resolution [LLMNR]) MUST NOT > be used in off-link communication." >=20 > What this means is that the hostname-to-address mapping for =20 > 254.169.in-addr.arpa addresses must be unique per interface. If you =20 > have two interfaces which are connected to different LLA subnets, =20 > 169.254.1.1 might map to hostnameA on one, and that same IP might be =20 > hostnameB on the other. Hmm, that seems to argue for some further namespace mangling so forward lookups make sense. From that perspective the namespace really should be xxx..local internally and xxx.local on the wire. Actually doing that would probably cause all sorts of problems though. :( -- Brooks --NtwzykIc2mflq5ck Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFE7iv1XY6L6fI4GtQRAjMVAJ4+KuzBkl9Yz3cl6utDAXzcFShCUgCg4UAg a1zXs96+/xoUn7OiZhOlDbE= =b3/E -----END PGP SIGNATURE----- --NtwzykIc2mflq5ck--