[MMUSIC] BUNDLE DECISSION: SDP Answer Restrictions

Christer Holmberg <christer.holmberg@ericsson.com> Fri, 24 May 2013 12:32 UTC

Return-Path: <christer.holmberg@ericsson.com>
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 7319F21F9260 for <mmusic@ietfa.amsl.com>; Fri, 24 May 2013 05:32:55 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.104
X-Spam-Level:
X-Spam-Status: No, score=-6.104 tagged_above=-999 required=5 tests=[AWL=0.144, BAYES_00=-2.599, HELO_EQ_SE=0.35, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-4]
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 s0Z7zb8O7LZg for <mmusic@ietfa.amsl.com>; Fri, 24 May 2013 05:32:49 -0700 (PDT)
Received: from mailgw7.ericsson.se (mailgw7.ericsson.se [193.180.251.48]) by ietfa.amsl.com (Postfix) with ESMTP id 5931D21F918C for <mmusic@ietf.org>; Fri, 24 May 2013 05:32:39 -0700 (PDT)
X-AuditID: c1b4fb30-b7f8a6d000001a2d-9a-519f5de65592
Received: from ESESSHC021.ericsson.se (Unknown_Domain [153.88.253.125]) by mailgw7.ericsson.se (Symantec Mail Security) with SMTP id 39.BD.06701.6ED5F915; Fri, 24 May 2013 14:32:38 +0200 (CEST)
Received: from ESESSMB209.ericsson.se ([169.254.9.167]) by ESESSHC021.ericsson.se ([153.88.183.81]) with mapi id 14.02.0328.009; Fri, 24 May 2013 14:32:37 +0200
From: Christer Holmberg <christer.holmberg@ericsson.com>
To: "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: BUNDLE DECISSION: SDP Answer Restrictions
Thread-Index: Ac5YdJNWNYfYqobOTueV815jNgS21w==
Date: Fri, 24 May 2013 12:32:37 +0000
Message-ID: <7594FB04B1934943A5C02806D1A2204B1C377967@ESESSMB209.ericsson.se>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [153.88.183.17]
Content-Type: multipart/alternative; boundary="_000_7594FB04B1934943A5C02806D1A2204B1C377967ESESSMB209erics_"
MIME-Version: 1.0
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrCLMWRmVeSWpSXmKPExsUyM+Jvre6z2PmBBj2rpCymLn/M4sDosWTJ T6YAxigum5TUnMyy1CJ9uwSujIm/9rAXLPetWLD/HGMD4xenLkZODgkBE4nX0zYxQdhiEhfu rWfrYuTiEBI4zCjR+vIfG0hCSGAJo0RDv0AXIwcHm4CFRPc/bZCwiIC6xNe9PcwgtrCAkcSh vofsEHFzibWbZrFC2HoSJ/9OBLNZBFQl/vU8ZwSxeQV8JTqaHoH1MgLt/X5qDdgNzALiEree zIe6R0BiyZ7zzBC2qMTLx/9YQU6QEFCUWN4vB1GeL/GwfRUzxEhBiZMzn7BMYBSahWTSLCRl s5CUQcR1JBbs/sQGYWtLLFv4mhnGPnPgMROy+AJG9lWM7LmJmTnp5eabGIEhf3DLb4MdjJvu ix1ilOZgURLn7dOeGigkkJ5YkpqdmlqQWhRfVJqTWnyIkYmDU6qBcSVH6UN9flspr3tX4uxf TQyq9XD41GnfrWM7NfhSy+s/U+Mq5/UXdaYee1O0c45I566nOl0Td/5/+K/y6vJdj9Me3eY9 Ka/sVh1wq/zSVpG3qQu6PdVFfifPniwfPvdQ7cLj9wx2qKb+mcxzoJbd8fws2wiWni+SVcej O0yM5JzVvv34v3ePhBJLcUaioRZzUXEiAFYbal5HAgAA
Subject: [MMUSIC] BUNDLE DECISSION: SDP Answer Restrictions
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.12
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: <http://www.ietf.org/mail-archive/web/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: Fri, 24 May 2013 12:32:55 -0000

Hi,

At the interim meeting yesterday, we agreed on some restrictions regarding creating SDP answers containing bundle group(s).

Note that the restrictions 1-3 are simply alignments with RFC 5888, and are listed simply for clarification purpose. Restrictions 4 is BUNDLE specific. Restriction 5 is also alignment with RFC 5888, as m- lines with port zero are not allowed within groups, but we will need some clarification text saying that a new offer will have to be sent in order to remove a stream (either from a bundle group, or completely from the session).

(Note that the text below is not necessarily the wording that will go into the draft)

In an SDP answer:

1)      a BUNDLE group MUST NOT be created, unless it was included in the associated offer

2)      an m- line MUST NOT be added to a BUNDLE group, unless it was included in a BUNDLE group in the associated offer

3)      an m- line MUST NOT be added to another BUNDLE group than the group in which was included in the associated offer

4)      an m- line MUST NOT be removed from a BUNDLE group if, in the associated offer, an identical port number was indicated for all m- lines in a BUNDLE group

5)      an m- line MUST NOT be rejected if, in the associated offer, an identical port number was indicated for all m- lines in a BUNDLE group


Note that there is also a discussion regarding bundle offers, e.g. when restrictions when adding new m- lines to a bundle. Based on the outcome of that, there may be some additional answer restrictions, e.g. regarding the change of bundle transport parameters. But, let's deal with that in the offer thread.

So, if anyone OBJECTS to the restrictions above, please indicate so.

Regards,

Christer