Re: [Sip] Using TLS in the first hop - Bug in RFC 5630

Iñaki Baz Castillo <ibc@aliax.net> Thu, 15 September 2011 15:31 UTC

Return-Path: <ibc@aliax.net>
X-Original-To: sip@ietfa.amsl.com
Delivered-To: sip@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 933D621F8495 for <sip@ietfa.amsl.com>; Thu, 15 Sep 2011 08:31:36 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.648
X-Spam-Level:
X-Spam-Status: No, score=-2.648 tagged_above=-999 required=5 tests=[AWL=0.029, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, MIME_8BIT_HEADER=0.3, RCVD_IN_DNSWL_LOW=-1]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s0fWxCkaYgvQ for <sip@ietfa.amsl.com>; Thu, 15 Sep 2011 08:31:36 -0700 (PDT)
Received: from mail-qw0-f44.google.com (mail-qw0-f44.google.com [209.85.216.44]) by ietfa.amsl.com (Postfix) with ESMTP id 1129421F848E for <sip@ietf.org>; Thu, 15 Sep 2011 08:31:35 -0700 (PDT)
Received: by qwb8 with SMTP id 8so1137543qwb.17 for <sip@ietf.org>; Thu, 15 Sep 2011 08:33:44 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.229.67.166 with SMTP id r38mr991138qci.254.1316100824503; Thu, 15 Sep 2011 08:33:44 -0700 (PDT)
Received: by 10.229.79.207 with HTTP; Thu, 15 Sep 2011 08:33:44 -0700 (PDT)
In-Reply-To: <CALiegf=Z3qZey-+0=wqN80BjS6Jn5V8tFU_w2LtS7O5v-jXK+Q@mail.gmail.com>
References: <CALiegfkNfJ7McZAA=a5ajYVzYtmAjC_KQdK1P_ez2L1dia5v2g@mail.gmail.com> <CFFC2869-C704-423E-974D-3F4B93145BBB@edvina.net> <CALiegfnh2C3GNddnneepcVsGgtOd1pSDBVC3uH72S1KaVT_jHg@mail.gmail.com> <3EBDBBCF-C3F3-4C64-B010-4F275B0A5A96@edvina.net> <CALiegfkKSHiEWF5+Lz5FBEawNc6ST1s3+MLYeBnUJedFjxQoDw@mail.gmail.com> <40FFF683-2CA1-4436-9421-42ACC205A42C@acmepacket.com> <CALiegf=Z3qZey-+0=wqN80BjS6Jn5V8tFU_w2LtS7O5v-jXK+Q@mail.gmail.com>
Date: Thu, 15 Sep 2011 17:33:44 +0200
Message-ID: <CALiegfn+tP-zxJF4tDuN9eHDaybucRu49QfA_MUHZMMyjCtz5g@mail.gmail.com>
From: Iñaki Baz Castillo <ibc@aliax.net>
To: Hadriel Kaplan <HKaplan@acmepacket.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Cc: "<sip@ietf.org>" <sip@ietf.org>, "Olle E. Johansson" <oej@edvina.net>
Subject: Re: [Sip] Using TLS in the first hop - Bug in RFC 5630
X-BeenThere: sip@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Session Initiation Protocol <sip.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/sip>, <mailto:sip-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/sip>
List-Post: <mailto:sip@ietf.org>
List-Help: <mailto:sip-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/sip>, <mailto:sip-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 15 Sep 2011 15:31:36 -0000

2011/9/15 Iñaki Baz Castillo <ibc@aliax.net>:
>> But that's not the only use-case for Contact - the Contact URI of Alice can be used at any time later for an out-of-dialog request to Alice, and at that point it suddenly needs a full sips path to Alice.  For example in a REFER case.
>
> If Alice wants to refer Bob to Carol, Alice would do better by sending
> a REFER with "Refer-To: <sip:carol@domain.org>" rather than using
> SIPS. Not sure if you meant this.

Ok, you meant the "attended transfer" case in which Alice sends a
REFER to Carol containing the Contact URI of Bob (while Alice is still
in a dialog with Bob).

Interesting case, right. What I think is that all this stuff is
unclear, confusing, badly designed and error prune.

-- 
Iñaki Baz Castillo
<ibc@aliax.net>