Re: [radext] Alissa Cooper's No Objection on draft-ietf-radext-coa-proxy-06: (with COMMENT)

Alan DeKok <aland@deployingradius.com> Wed, 15 August 2018 20:05 UTC

Return-Path: <aland@deployingradius.com>
X-Original-To: radext@ietfa.amsl.com
Delivered-To: radext@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1D567130DE7; Wed, 15 Aug 2018 13:05:14 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.9
X-Spam-Level:
X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2fJqG89D9ZjI; Wed, 15 Aug 2018 13:05:12 -0700 (PDT)
Received: from mail.networkradius.com (mail.networkradius.com [62.210.147.122]) by ietfa.amsl.com (Postfix) with ESMTP id 1A935130E14; Wed, 15 Aug 2018 13:05:10 -0700 (PDT)
Received: from [192.168.20.38] (CPEf4cc55220745-CM64777ddff610.cpe.net.cable.rogers.com [173.32.191.82]) by mail.networkradius.com (Postfix) with ESMTPSA id 7500840D; Wed, 15 Aug 2018 20:05:08 +0000 (UTC)
Content-Type: text/plain; charset="utf-8"
Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\))
From: Alan DeKok <aland@deployingradius.com>
In-Reply-To: <202C0FD8-8B63-4A14-92B9-299810EDAD19@cooperw.in>
Date: Wed, 15 Aug 2018 16:05:06 -0400
Cc: Eric Rescorla <ekr@rtfm.com>, Winter Stefan <stefan.winter@restena.lu>, radext@ietf.org, IESG <iesg@ietf.org>, draft-ietf-radext-coa-proxy@ietf.org, radext-chairs@ietf.org
Content-Transfer-Encoding: quoted-printable
Message-Id: <CFDEABD1-D6EB-4C04-AE28-2A3C5A86C74C@deployingradius.com>
References: <153435801941.3053.15907114318025420750.idtracker@ietfa.amsl.com> <926C796E-1339-488F-812C-27A003DF1D27@deployingradius.com> <CABcZeBNo=D21YhcAKXFp0abO4NGoGPiog1p-+GyW+g_4BYbTgg@mail.gmail.com> <9BC9E9E6-1B18-4BA0-A8BF-CBA95954EBA2@deployingradius.com> <202C0FD8-8B63-4A14-92B9-299810EDAD19@cooperw.in>
To: Alissa Cooper <alissa@cooperw.in>
X-Mailer: Apple Mail (2.3124)
Archived-At: <https://mailarchive.ietf.org/arch/msg/radext/Ojfpv8i-wlxfUn2PVFO9RddARU0>
Subject: Re: [radext] Alissa Cooper's No Objection on draft-ietf-radext-coa-proxy-06: (with COMMENT)
X-BeenThere: radext@ietf.org
X-Mailman-Version: 2.1.27
Precedence: list
List-Id: RADIUS EXTensions working group discussion list <radext.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/radext>, <mailto:radext-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/radext/>
List-Post: <mailto:radext@ietf.org>
List-Help: <mailto:radext-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/radext>, <mailto:radext-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 15 Aug 2018 20:05:14 -0000

On Aug 15, 2018, at 4:02 PM, Alissa Cooper <alissa@cooperw.in> wrote:
> 
> Acknowledging my limited recall of how RADIUS attributes are defined, I think what is tripping me up is the definition of the Length field, which says “4 to 23.” If I assume that length is measured in octets, that the type field requires 1 octet, that the length field requires 1 octet, and that the value can be between 1 and 32 octets long, I would conclude that valid length values would be between 3 and 34, not between 4 and 23. Can you clarify why not?

  The Length of the attribute typically refers to allowed values of the Length field in the RADIUS attribute header.  That Length includes the octets of the header.

  In this case, 3.

> This is I guess the root of why I thought the octet diagram would help.
> 
> Alissa  
> 
>> 
>> There is no need for the *contents* of the attribute to have any delimitation whatsoever.
>> 
>> Alan DeKok.