IETF Logo Mail Archive

[rtcweb] FW: [MMUSIC] BUNDLE: media-level c= lines in bundle-only m= sections?

Christer Holmberg <christer.holmberg@ericsson.com> Thu, 04 January 2018 13:12 UTC

Return-Path: <christer.holmberg@ericsson.com>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3DE9F126D45 for <rtcweb@ietfa.amsl.com>; Thu, 4 Jan 2018 05:12:26 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.22
X-Spam-Level:
X-Spam-Status: No, score=-4.22 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-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 vWrjPPR_WYWz for <rtcweb@ietfa.amsl.com>; Thu, 4 Jan 2018 05:12:24 -0800 (PST)
Received: from sesbmg22.ericsson.net (sesbmg22.ericsson.net [193.180.251.48]) (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 226E1126CD6 for <rtcweb@ietf.org>; Thu, 4 Jan 2018 05:12:23 -0800 (PST)
X-AuditID: c1b4fb30-d31ff70000006bc7-92-5a4e28361105
Received: from ESESSHC014.ericsson.se (Unknown_Domain [153.88.183.60]) by sesbmg22.ericsson.net (Symantec Mail Security) with SMTP id 69.A1.27591.6382E4A5; Thu, 4 Jan 2018 14:12:22 +0100 (CET)
Received: from ESESSMB109.ericsson.se ([169.254.9.206]) by ESESSHC014.ericsson.se ([153.88.183.60]) with mapi id 14.03.0352.000; Thu, 4 Jan 2018 14:12:21 +0100
From: Christer Holmberg <christer.holmberg@ericsson.com>
To: "rtcweb@ietf.org" <rtcweb@ietf.org>
Thread-Topic: [MMUSIC] BUNDLE: media-level c= lines in bundle-only m= sections?
Thread-Index: AQHThV2nhxfovOF59ESXeedV+yo54A==
Date: Thu, 04 Jan 2018 13:12:20 +0000
Message-ID: <D673F6F2.284FA%christer.holmberg@ericsson.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
user-agent: Microsoft-MacOutlook/14.7.7.170905
x-originating-ip: [153.88.183.147]
Content-Type: multipart/mixed; boundary="_004_D673F6F2284FAchristerholmbergericssoncom_"
MIME-Version: 1.0
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrEIsWRmVeSWpSXmKPExsUyM2K7ja6Zhl+UQet5AYu1/9rZHRg9liz5 yRTAGMVlk5Kak1mWWqRvl8CVsXXRNeaCn6YV819PZ2lgXK/XxcjJISFgIjGh9xJrFyMXh5DA YUaJGW3f2SCcxYwSy6b8Y+xi5OBgE7CQ6P6nDdIgIqAucfnhBXYQW1ggQOLulqeMEPFAiaf9 T6BsPYnJL76D2SwCKhI/j7xmBrF5Bawltj/+yQJiMwqISXw/tYYJxGYWEJe49WQ+E8RBIhIP L55mg7BFJV4+/scKYosCzdxw4jY7yDkSAkoS07amQbRGSfx5epEJYrygxMmZT1gmMArNQjJ1 FpKyWUjKIOIJEnN2HWeHsA0k3p+bzwxha0ssW/gaytaX2PjlLCOEbS2xYn0XE6YaXYkj549B zVGUaNvezDYLGIrMAisYJRof/mCFaV50aCULTNGU7ofsCxj5VjGKFqcWJ+WmGxnppRZlJhcX 5+fp5aWWbGIExu7BLb8NdjC+fO54iFGAg1GJh7dc1i9KiDWxrLgy9xCjCtCcRxtWX2CUYsnL z0tVEuH1ee0bJcSbklhZlVqUH19UmpNafIhRmoNFSZz3pCdvlJBAemJJanZqakFqEUyWiYNT qoFxIosj6+Gte2X+3d7z1tmW1/ejvpMxm+5NSTeZHa8brS/lnu5tO7DZK2/KlevuB04FejUr v7y+vuJK3QwxH+fjgWIs6xQy9i+ImXFpl5uCHovH2skXJm0KLW2veH9h5vny/1lXqljeGchM KMy7Uy/Hx83pe+PwDq5Jj+J8nn6f4tn+4ef8KwfclViKMxINtZiLihMBquUCp+UCAAA=
Archived-At: <https://mailarchive.ietf.org/arch/msg/rtcweb/L51uaMKyl5VuiZwziczQ3QqkJWc>
Subject: [rtcweb] FW: [MMUSIC] BUNDLE: media-level c= lines in bundle-only m= sections?
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Real-Time Communication in WEB-browsers working group list <rtcweb.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/rtcweb/>
List-Post: <mailto:rtcweb@ietf.org>
List-Help: <mailto:rtcweb-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 04 Jan 2018 13:12:26 -0000

FYI,

This also impacts JSEP, which currently specifies that media-level c= lines are added to ALL bundled m= sections – including bundle-only ones.

Regards,

Christer

From: mmusic <mmusic-bounces@ietf.org<mailto:mmusic-bounces@ietf.org>> on behalf of Christer Holmberg <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.com>>
Date: Thursday 4 January 2018 at 15:08
To: "mmusic@ietf.org<mailto:mmusic@ietf.org>" <mmusic@ietf.org<mailto:mmusic@ietf.org>>
Cc: Ben Campbell <ben@nostrum.com<mailto:ben@nostrum.com>>
Subject: [MMUSIC] BUNDLE: media-level c= lines in bundle-only m= sections?

Hi,

BUNDLE doesn’t say much about c= lines, the assumption being that there are no BUNDLE-specific rules related to c= lines: one can use a session-level c= line, or media-level c= lines, also with BUNDLE. The BUNDLE address will use whatever IP address is associated (implicitly or explicitly) with the tagged m= section.

So far so good.

Now, Ekr raised a JSEP GitHub issue regarding media-level c= lines in bundle-only m= sections. As we know, BUNDLE currently specifies that a zero port value is assigned to bundle-only m= sections, but nothing is said about media-level c= lines.

https://github.com/rtcweb-wg/jsep/issues/843

(The GitHub issue was initially created because of another issue, but if you follow the discussion it will end up in this)

My suggestion would be that an offerer/answerer MUST NOT assign media-level c= lines to bundle-only m= sections.

Would people be ok with this? Does someone suggest something else?

Whatever the outcome, I think it would be good to clarify it in BUNDLE. I don't think we need to bring the document back to the WG in order to do that – if we can agree on the text I will implement it in a future update (e.g., based on the IESG reviews) of the draft.

Regards,

Christer

v2.23.0 | Report a Bug | By Email