Re: [netconf] Augmenting rpc-reply

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Fri, 11 September 2020 12:56 UTC

Return-Path: <j.schoenwaelder@jacobs-university.de>
X-Original-To: netconf@ietfa.amsl.com
Delivered-To: netconf@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1CB213A08DE for <netconf@ietfa.amsl.com>; Fri, 11 Sep 2020 05:56:29 -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, SPF_HELO_NONE=0.001, 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 CRChT9dvmkC1 for <netconf@ietfa.amsl.com>; Fri, 11 Sep 2020 05:56:27 -0700 (PDT)
Received: from atlas5.jacobs-university.de (atlas5.jacobs-university.de [212.201.44.20]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 65BFD3A08D6 for <netconf@ietf.org>; Fri, 11 Sep 2020 05:56:27 -0700 (PDT)
Received: from localhost (demetrius5.irc-it.jacobs-university.de [10.70.0.222]) by atlas5.jacobs-university.de (Postfix) with ESMTP id CF0DB83F; Fri, 11 Sep 2020 14:56:25 +0200 (CEST)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from atlas5.jacobs-university.de ([10.70.0.198]) by localhost (demetrius5.jacobs-university.de [10.70.0.222]) (amavisd-new, port 10032) with ESMTP id dTU9L3f-wt2P; Fri, 11 Sep 2020 14:56:25 +0200 (CEST)
Received: from hermes.jacobs-university.de (hermes.jacobs-university.de [212.201.44.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hermes.jacobs-university.de", Issuer "DFN-Verein Global Issuing CA" (verified OK)) by atlas5.jacobs-university.de (Postfix) with ESMTPS; Fri, 11 Sep 2020 14:56:25 +0200 (CEST)
Received: from localhost (demetrius5.irc-it.jacobs-university.de [10.70.0.222]) by hermes.jacobs-university.de (Postfix) with ESMTP id 623C820156; Fri, 11 Sep 2020 14:56:25 +0200 (CEST)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from hermes.jacobs-university.de ([212.201.44.23]) by localhost (demetrius5.jacobs-university.de [10.70.0.222]) (amavisd-new, port 10028) with ESMTP id KI6pLj0D9QNI; Fri, 11 Sep 2020 14:56:25 +0200 (CEST)
Received: from localhost (anna.jacobs.jacobs-university.de [10.50.218.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by hermes.jacobs-university.de (Postfix) with ESMTPS id 2B42B20154; Fri, 11 Sep 2020 14:56:24 +0200 (CEST)
Date: Fri, 11 Sep 2020 14:56:23 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: "Jan Lindblad (jlindbla)" <jlindbla=40cisco.com@dmarc.ietf.org>
Cc: Netconf <netconf@ietf.org>, "kent@watsen.net" <kent@watsen.net>
Message-ID: <20200911125623.upqcb4p5oqnv5xd7@anna.jacobs.jacobs-university.de>
Reply-To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
Mail-Followup-To: "Jan Lindblad (jlindbla)" <jlindbla=40cisco.com@dmarc.ietf.org>, Netconf <netconf@ietf.org>, "kent@watsen.net" <kent@watsen.net>
References: <FC898DB0-8306-4E23-BD34-88657D36C98B@cisco.com> <20200910.185258.804843941725520730.id@4668.se> <CABCOCHQnw_H=W0Sgian7LyLgTABMu_Xg+YPfxe5Yx+wJ13074Q@mail.gmail.com> <0CCA567F-5691-4A85-812C-0B95470E5C6C@cisco.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <0CCA567F-5691-4A85-812C-0B95470E5C6C@cisco.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/netconf/D8jg52KUfkYxNtMau0SSAFkHyNE>
Subject: Re: [netconf] Augmenting rpc-reply
X-BeenThere: netconf@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: NETCONF WG list <netconf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/netconf>, <mailto:netconf-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/netconf/>
List-Post: <mailto:netconf@ietf.org>
List-Help: <mailto:netconf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/netconf>, <mailto:netconf-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 11 Sep 2020 12:56:29 -0000

On Fri, Sep 11, 2020 at 12:29:54PM +0000, Jan Lindblad (jlindbla) wrote:

> However, RFC 7950 says in section 7.14.4:
> 
>    If the RPC operation invocation succeeded and no output parameters
>    are returned, the <rpc-reply> contains a single <ok/> element defined
>    in [RFC6241].
> 
> Is it reasonable to interpret this 7950 language to exclude any and all extensions? One could argue that this prescribes a single <ok/> as far as 7950 and 6241 are concerned, but not ruling out extensions.

This is how I would have read this statement.
 
> Which seems to say that if a note is returned, you would get:
> 
>       <rpc-reply message-id="101"
>                  xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
>         <note xmlns="my-namespace">abc...</note>
>       </rpc-reply>
> 
> This is also consistent with the XSD in RFC 6241.

This behavior might be consistent with the XSD but I suspect that some
clients get pretty confused if instead of an <ok/> that get something
they did not expect.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <https://www.jacobs-university.de/>