[MMUSIC] Issue #27: Allow RTP attributes in non-media m= sections

Eric Rescorla <ekr@rtfm.com> Thu, 16 February 2017 14:19 UTC

Return-Path: <ekr@rtfm.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 E00A31294B4 for <mmusic@ietfa.amsl.com>; Thu, 16 Feb 2017 06:19:43 -0800 (PST)
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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=rtfm-com.20150623.gappssmtp.com
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 iIWwTuJXZsZB for <mmusic@ietfa.amsl.com>; Thu, 16 Feb 2017 06:19:43 -0800 (PST)
Received: from mail-ot0-x22e.google.com (mail-ot0-x22e.google.com [IPv6:2607:f8b0:4003:c0f::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C40821294AD for <mmusic@ietf.org>; Thu, 16 Feb 2017 06:13:41 -0800 (PST)
Received: by mail-ot0-x22e.google.com with SMTP id 32so11648562oth.3 for <mmusic@ietf.org>; Thu, 16 Feb 2017 06:13:41 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rtfm-com.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to; bh=T40Kiv4Q+iHruGo5gspZjmEFYzinOFigco+UawJWlzA=; b=SWRU6PZ/Ho24fIAew6F+3ubSr/vW3VJqCr1lWf9Kt8JUoCqCMUszFuKIGtQ3sozVOn EcCEPjms7rW3Srl+XVUg0jPWSu1RbM6/WQDgAKxQffyQakAsLyy2W8fafa19+1VT9aJw Wqi4Crmu2RFdTUaibCoVks/Qid3xa2aW09aVYQGf5gwxmu/DKZVzstvRduJIgvXPkdby nbnpIv4RcqzEZavfQvBsBfWC1l/xhFBGgWjdmVfYhmZLeLXMj66hKqOCkCjtQXR74haW FDrD4KFyAI6zQPR/dJ8hhiNDxEeE0h40izgRyJ3elhehIFU4gv6MOUgaii6q5aED0cx3 DmFA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=T40Kiv4Q+iHruGo5gspZjmEFYzinOFigco+UawJWlzA=; b=gMv0bX+H1cUVesRj1/bp7JWERRtyw/ViOIF5/PdPhqTncaQs658Ok4cAqRsLMvDlC0 mgID7B8TPd9D6gkM76MgyFSmOmz+v8eeV4GCrc/wRFcHHREr3HjTFLShezYNvjtGHc9G LZA9XcSEsOgRizZIo5jNX+/BOlCbflOqGPytla0xnAG9OUYklFLnrUgj4EeDm5Ry2yN/ IJy7UZNCeF0Dqtzh3vMJ+C4EIzYaIpCqHVULRDMf80BbUHBPlUJithuLcGni//HvdwFW jo+AHZZyEqNaOJ1HuJI7iTuQAc67iFHRomSV5ZQIZ1iB/v03dwEpHrV9Ds06Xb74fkii RWHQ==
X-Gm-Message-State: AMke39kRcD6Ga2KfGjZuLYAHbR39lYHpPWIDyvZm6dCKhH53LtJn4SZkbZG92lxwq/h9Ykcq4Sx+i6uP4YZucw==
X-Received: by 10.157.46.228 with SMTP id w91mr1201315ota.31.1487254421054; Thu, 16 Feb 2017 06:13:41 -0800 (PST)
MIME-Version: 1.0
Received: by 10.157.33.245 with HTTP; Thu, 16 Feb 2017 06:11:50 -0800 (PST)
From: Eric Rescorla <ekr@rtfm.com>
Date: Thu, 16 Feb 2017 06:11:50 -0800
Message-ID: <CABcZeBP-XL9snCaghp5Hxn5pNxpmSSodWd93Qa-hCL8yDi97gw@mail.gmail.com>
To: mmusic WG <mmusic@ietf.org>
Content-Type: multipart/alternative; boundary="001a113d05807539300548a667c1"
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/1ouvHd2PDB7Bk_WpAc1aKybYiqs>
Subject: [MMUSIC] Issue #27: Allow RTP attributes in non-media m= sections
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.17
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: Thu, 16 Feb 2017 14:19:44 -0000

See:
https://github.com/cdh4u/draft-sdp-bundle/issues/27
https://github.com/rtcweb-wg/jsep/issues/528

The basic issue is that it's possible to have a situation where you have
both
media and data m= sections but the BUNDLE tag is associated with the data
m= section and now you need to put the TRANSPORT and IDENTICAL
attributes somewhere. The JSEP editors discussed this and came to the
conclusion that it should go with the BUNDLE tag (i.e., in the data m=
section)
and that BUNDLE should forbid this, but it requires a change to BUNDLE.

-Ekr