Re: [MMUSIC] Draft new version: T140-data-channel -02 - Reference RFC 4566 for direction attributes and not RFC 3264

Gunnar Hellström <gunnar.hellstrom@omnitor.se> Wed, 04 September 2019 21:20 UTC

Return-Path: <gunnar.hellstrom@omnitor.se>
X-Original-To: mmusic@ietfa.amsl.com
Delivered-To: mmusic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 13DA7120047 for <mmusic@ietfa.amsl.com>; Wed, 4 Sep 2019 14:20:51 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.898
X-Spam-Level:
X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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 YlsmahBRoC5x for <mmusic@ietfa.amsl.com>; Wed, 4 Sep 2019 14:20:48 -0700 (PDT)
Received: from bin-mail-out-05.binero.net (bin-mail-out-05.binero.net [195.74.38.228]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0139B1200A3 for <mmusic@ietf.org>; Wed, 4 Sep 2019 14:20:47 -0700 (PDT)
X-Halon-ID: d848b211-cf59-11e9-903a-005056917f90
Authorized-sender: gunnar.hellstrom@omnitor.se
Received: from [192.168.2.136] (unknown [88.129.173.120]) by bin-vsp-out-02.atm.binero.net (Halon) with ESMTPSA id d848b211-cf59-11e9-903a-005056917f90; Wed, 04 Sep 2019 23:20:40 +0200 (CEST)
From: Gunnar Hellström <gunnar.hellstrom@omnitor.se>
To: Christer Holmberg <christer.holmberg@ericsson.com>, mmusic@ietf.org
References: <74EDF323-AE38-4D58-8006-D50B89348CFA@ericsson.com> <a0d1110e-5be2-6e69-dbc4-9fd9f2995a47@omnitor.se>
Message-ID: <204ae1d2-0b26-f711-5828-51a058735e3b@omnitor.se>
Date: Wed, 04 Sep 2019 23:20:42 +0200
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0
MIME-Version: 1.0
In-Reply-To: <a0d1110e-5be2-6e69-dbc4-9fd9f2995a47@omnitor.se>
Content-Type: multipart/alternative; boundary="------------1EE63F757B9ADC8A16D9B720"
Content-Language: en-US
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/r-7bVJqHAzYNDx5s93LkCQ0cp6Y>
Subject: Re: [MMUSIC] Draft new version: T140-data-channel -02 - Reference RFC 4566 for direction attributes and not RFC 3264
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Multiparty Multimedia Session Control Working Group <mmusic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mmusic>, <mailto:mmusic-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/mmusic/>
List-Post: <mailto:mmusic@ietf.org>
List-Help: <mailto:mmusic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mmusic>, <mailto:mmusic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 04 Sep 2019 21:20:51 -0000

Hi,

This is another topic for discussion:

I think that session level direction attributes should work on T.140 
data channels where no direction attribute is set on the dcsa(t140) level.
RFC 4566bis seems to expect that. It is written as if it was defining 
that session level attributes if specified should govern in the whole 
session.

And I think that the sdpneg-23 draft tries to say that attributes 
defined for general session and media level use should be allowed to 
work on DCSA level for any subprotocol without further specification or 
registration.

Regards


Gunnar




It should be discussed what happens if there is a direction attribute on 
media level in the media declaration for the SCTP declaration.. Probably 
a similar statement as for session level is needed.

Den 2019-09-04 kl. 23:03, skrev Gunnar Hellström:
>
> Hi,
>
> I have created a number of pull requests to the GitHub repository for 
> draft-holmberg-mmusic-t140-usage-data-channel-02
>
> Many are editorial. A few require discussion in the list.
>
>
> Regards
>
> Gunnar
>
>
> Den 2019-09-03 kl. 14:10, skrev Christer Holmberg:
>>
>> Hi,
>>
>> I have mereged the following PR:
>>
>> https://github.com/cdh4u/draft-datachannel-t140/pull/6
>>
>> …and submitted a new version (-02) of 
>> draft-holmberg-mmusic-t140-usage-data-channel.
>>
>> The main changes are:
>>
>>   * IANA registry update for SDP attributes that can be included in
>>     dcsa attributes
>>   * Detailed procedures on usage of the direction attributes inside
>>     dcsa attributes
>>
>> Regards,
>>
>> Christer
>>
>>
>> _______________________________________________
>> mmusic mailing list
>> mmusic@ietf.org
>> https://www.ietf.org/mailman/listinfo/mmusic
> -- 
> -----------------------------------------
> Gunnar Hellström
> Omnitor
> gunnar.hellstrom@omnitor.se
> +46 708 204 288
>
> _______________________________________________
> mmusic mailing list
> mmusic@ietf.org
> https://www.ietf.org/mailman/listinfo/mmusic