Re: [core] Directing responses to a broker

Christian Amsüss <c.amsuess@energyharvesting.at> Wed, 07 June 2017 23:42 UTC

Return-Path: <c.amsuess@energyharvesting.at>
X-Original-To: core@ietfa.amsl.com
Delivered-To: core@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 25628128CD5 for <core@ietfa.amsl.com>; Wed, 7 Jun 2017 16:42:36 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, 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 Uxe6_16H6Tur for <core@ietfa.amsl.com>; Wed, 7 Jun 2017 16:42:33 -0700 (PDT)
Received: from prometheus.amsuess.com (alt.prometheus.amsuess.com [IPv6:2a01:4f8:190:3064::3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2EB7C131496 for <core@ietf.org>; Wed, 7 Jun 2017 16:42:32 -0700 (PDT)
Received: from poseidon-mailhub.amsuess.com (unknown [IPv6:2a02:b18:c13b:8010:a800:ff:fede:b1bd]) by prometheus.amsuess.com (Postfix) with ESMTPS id 0AA2146FEC; Thu, 8 Jun 2017 01:42:30 +0200 (CEST)
Received: from poseidon-mailbox.amsuess.com (poseidon-mailbox.amsuess.com [10.13.13.231]) by poseidon-mailhub.amsuess.com (Postfix) with ESMTP id AD52236; Thu, 8 Jun 2017 01:42:28 +0200 (CEST)
Received: from hephaistos.amsuess.com (hermes.amsuess.com [10.13.13.254]) by poseidon-mailbox.amsuess.com (Postfix) with ESMTPSA id 78BF63A6; Thu, 8 Jun 2017 01:42:28 +0200 (CEST)
Received: (nullmailer pid 26040 invoked by uid 1000); Wed, 07 Jun 2017 23:42:26 -0000
Date: Thu, 08 Jun 2017 01:42:25 +0200
From: Christian Amsüss <c.amsuess@energyharvesting.at>
To: Benjamin Damm <bdamm@ssni.com>
Cc: "core@ietf.org" <core@ietf.org>
Message-ID: <20170607234225.ncgvyu7rb32m2plg@hephaistos.amsuess.com>
References: <1496877079259.4240@ssni.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="lchvxd3ufe76tjck"
Content-Disposition: inline
In-Reply-To: <1496877079259.4240@ssni.com>
User-Agent: NeoMutt/20170306 (1.8.0)
Archived-At: <https://mailarchive.ietf.org/arch/msg/core/WR0pB_bRSDfrfKcOW2ZqlxChh-8>
Subject: Re: [core] Directing responses to a broker
X-BeenThere: core@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: "Constrained RESTful Environments \(CoRE\) Working Group list" <core.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/core>, <mailto:core-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/core/>
List-Post: <mailto:core@ietf.org>
List-Help: <mailto:core-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/core>, <mailto:core-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 07 Jun 2017 23:42:36 -0000

Hello Ben,

On Wed, Jun 07, 2017 at 11:11:19PM +0000, Benjamin Damm wrote:
> We have a scenario where we want to support CoAP Observes and we also
> want to optionally flag that responses should not come back to the
> initiator, but rather go to a broker instead. Have there been any
> proposals for an extension to indicate this?

This sounds a lot like what Zhen Cao has suggested in
[delegated-observe].

I think such a setup -- if you indeed think what Zhen wrote -- is too
brittle to be practical, and [suggested] alternatives I'd consider more
reliable. The discussion on delegated-observe became quiet, but please
have a look and let's continue it.

Best regards
Christian

[delegated-observe]: https://tools.ietf.org/html/draft-cao-core-delegated-observe-00
[suggested]: https://mailarchive.ietf.org/arch/msg/core/sSRxmiXgfHrnDbrKRyvnQ5QIJCo

-- 
Christian Amsüss                      | Energy Harvesting Solutions GmbH
founder, system architect             | headquarter:
mailto:c.amsuess@energyharvesting.at  | Arbeitergasse 15, A-4400 Steyr
tel:+43-664-97-90-6-39                | http://www.energyharvesting.at/
                                      | ATU68476614