Re: [apps-discuss] apps-team review of draft-ietf-hokey-ldn-discovery-06

Mark Andrews <marka@isc.org> Fri, 04 February 2011 23:52 UTC

Return-Path: <marka@isc.org>
X-Original-To: apps-discuss@core3.amsl.com
Delivered-To: apps-discuss@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id C7E203A6A61; Fri, 4 Feb 2011 15:52:14 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.503
X-Spam-Level:
X-Spam-Status: No, score=-2.503 tagged_above=-999 required=5 tests=[AWL=0.096, BAYES_00=-2.599]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GNA2qogXl8Is; Fri, 4 Feb 2011 15:52:14 -0800 (PST)
Received: from bikeshed.isc.org (bikeshed.isc.org [IPv6:2001:4f8:3:d::19]) by core3.amsl.com (Postfix) with ESMTP id C348D3A69F4; Fri, 4 Feb 2011 15:52:13 -0800 (PST)
Received: from drugs.dv.isc.org (drugs.dv.isc.org [IPv6:2001:470:1f00:820:ea06:88ff:fef3:4f9c]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by bikeshed.isc.org (Postfix) with ESMTPSA id 10A78216C2B; Fri, 4 Feb 2011 23:55:39 +0000 (UTC) (envelope-from marka@isc.org)
Received: from drugs.dv.isc.org (localhost [127.0.0.1]) by drugs.dv.isc.org (Postfix) with ESMTP id 0F9BB9B32D8; Sat, 5 Feb 2011 10:55:36 +1100 (EST)
To: Eliot Lear <lear@cisco.com>
From: Mark Andrews <marka@isc.org>
References: <4D4BE6A4.9060801@cisco.com><4D4C4184.4070108@cisco.com>
In-reply-to: Your message of "Fri, 04 Feb 2011 19:12:20 BST." <4D4C4184.4070108@cisco.com>
Date: Sat, 05 Feb 2011 10:55:36 +1100
Message-Id: <20110204235536.0F9BB9B32D8@drugs.dv.isc.org>
X-Mailman-Approved-At: Mon, 07 Feb 2011 11:16:27 -0800
Cc: "apps-discuss@ietf.org" <apps-discuss@ietf.org>, draft-ietf-hokey-ldn-discovery@tools.ietf.org, IETF Discussion <ietf@ietf.org>, Robert Elz <kre@munnari.OZ.AU>, 'IESG' <iesg@ietf.org>
Subject: Re: [apps-discuss] apps-team review of draft-ietf-hokey-ldn-discovery-06
X-BeenThere: apps-discuss@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: General discussion of application-layer protocols <apps-discuss.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/apps-discuss>, <mailto:apps-discuss-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/apps-discuss>
List-Post: <mailto:apps-discuss@ietf.org>
List-Help: <mailto:apps-discuss-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/apps-discuss>, <mailto:apps-discuss-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 04 Feb 2011 23:52:14 -0000

In message <4D4C4184.4070108@cisco.com>om>, Eliot Lear writes:
> Correcting something I wrote (thanks to Rob Elz):
> 
> On 2/4/11 12:44 PM, Eliot Lear wrote:
> > According to RFC 4282 it should be possible for an NAI realm to begin
> > with a digit.  Strictly speaking this is not allowed by RFC 1035, which
> > RFC 3315 refers to, which this document references.  As a matter of
> > correctness, I might simply reference RFC 4282 instead of RFC 3315.
> 
> There is confusion here.  1035 has display guidelines relating to the
> use of numbers.  RFC 4282 indicates makes the claim that the limitation
> is stronger.  RFC 2181 clarifies this in Section 11.  Either reference,
> therefore, would work, and the authors should ignore the above quoted
> text.  In time it may be worth RFC3315bis referencing 1035 and 2181, and
> RFC 4282 doing the same.

RFC 1035 puts NO, NONE, NADA restrictions on labels other than length.
Hell even 0x00 is allowed as a octet in a label "\000" is how you
enter it.

The restrictions on hostnames comes from RFC 952 as is relaxed by RFC 1123.
The restrictions on mail domains comes from RFC 821 or 822 (I don't care to
look up which).  This may now have been relaxed when these were updated but
RFC 1123 failed to formally do so as it only updates RFC 952.

Mark
> Eliot
> _______________________________________________
> Ietf mailing list
> Ietf@ietf.org
> https://www.ietf.org/mailman/listinfo/ietf
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org