Re: [MMUSIC] Mirja Kühlewind's Discuss on draft-ietf-mmusic-sctp-sdp-23: (with DISCUSS)

Christer Holmberg <christer.holmberg@ericsson.com> Thu, 02 March 2017 10:28 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 3C5471294C6; Thu, 2 Mar 2017 02:28:26 -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 hT7lRQtMK0pK; Thu, 2 Mar 2017 02:28:24 -0800 (PST)
Received: from sessmg22.ericsson.net (sessmg22.ericsson.net [193.180.251.58]) (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 A1879129473; Thu, 2 Mar 2017 02:28:23 -0800 (PST)
X-AuditID: c1b4fb3a-6f7ff70000007c1e-e8-58b7f3c4dd90
Received: from ESESSHC012.ericsson.se (Unknown_Domain [153.88.183.54]) by (Symantec Mail Security) with SMTP id 29.18.31774.4C3F7B85; Thu, 2 Mar 2017 11:28:21 +0100 (CET)
Received: from ESESSMB109.ericsson.se ([169.254.9.56]) by ESESSHC012.ericsson.se ([153.88.183.54]) with mapi id 14.03.0319.002; Thu, 2 Mar 2017 11:28:20 +0100
From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Roman Shpount <rshpount@turbobridge.com>, Ben Campbell <ben@nostrum.com>
Thread-Topic: =?windows-1254?Q?Mirja_K=FChlewind's_Discuss_on_draft-ietf-mmusic-sctp-sd?= =?windows-1254?Q?p-23:_(with_DISCUSS)?=
Thread-Index: AQHSiEaxS+qNKsn/A0y+WNY+OfKww6Frs1fQ///1IwCAABFeUP//8EEAgAAA4YCAAAH3gIAAE4kggAAVhACABDfnAIAAQksAgAAt4QCAAR3EAIAAFWGAgAtEKQCAA+rWgIAAKSkAgAB2+4A=
Date: Thu, 2 Mar 2017 10:28:20 +0000
Message-ID: <D4DDC0BE.18935%christer.holmberg@ericsson.com>
References: <148724403323.15929.1432579178871938006.idtracker@ietfa.amsl.com> <7594FB04B1934943A5C02806D1A2204B4C0040D6@ESESSMB209.ericsson.se> <9F29D433-0AE1-43B0-B13E-AEC2861DFE75@kuehlewind.net> <7594FB04B1934943A5C02806D1A2204B4C00438C@ESESSMB209.ericsson.se> <CABcZeBPPFUe-ZtW9Lt636OhoMH8ws2oVi94YQJeUQKXteC-XRg@mail.gmail.com> <81A8D5E0-6641-4136-AFE6-74D3C49C7707@kuehlewind.net> <CABcZeBMpR+jE7jB4O=k_LPGhEBZPwUpo7vFnov4xvvhw_mYUAg@mail.gmail.com> <7594FB04B1934943A5C02806D1A2204B4C00443C@ESESSMB209.ericsson.se> <CAD5OKxvtxyVn1r1pJhPCYMON-bTwWYjCvxts4K1ucgxaGFcCSg@mail.gmail.com> <41D72B07-0B15-47A9-A118-5C67670F9F4F@kuehlewind.net> <1E30B705-9E74-4460-87D8-1395925B74F8@kuehlewind.net> <CAD5OKxu7DJ5sMW0G_SvzyKiYVeyGxFVSub-aiT2u8kXCfqCF+g@mail.gmail.com> <86C5D8B5-40B6-4228-BF10-00BF9DFEB93C@nostrum.com> <492F1BF9-2F1C-4D16-8B9B-B9FD13592E13@kuehlewind.net> <D4D9F0A9.18675%christer.holmberg@ericsson.com> <6366ADF1-E3E4-4C91-8579-85246D3E3714@nostrum.com> <CAD5OKxvJTy08tpbiket9BDOUnX3aYvBG12z51W+uJcxqRzgjFA@mail.gmail.com>
In-Reply-To: <CAD5OKxvJTy08tpbiket9BDOUnX3aYvBG12z51W+uJcxqRzgjFA@mail.gmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
user-agent: Microsoft-MacOutlook/14.7.1.161129
x-originating-ip: [153.88.183.19]
Content-Type: multipart/alternative; boundary="_000_D4DDC0BE18935christerholmbergericssoncom_"
MIME-Version: 1.0
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrCIsWRmVeSWpSXmKPExsUyM2K7me7Rz9sjDLadU7WY33ma3eLVuvnM Fiten2O3eH9B12LGn4nMFi+uf2S2OL9zPZPF1OWPWSyuP93F4sDpMeX3RlaPJUt+Mnm0fFzI 6jFr5xMWj8mP25g9tv79yxbAFsVlk5Kak1mWWqRvl8CV8f/bc7aC9/4V/6cJNzDOdeli5OSQ EDCRWLXsEHsXIxeHkMA6RolvT/YwQziLGCVurrjG0sXIwcEmYCHR/U8bpEFEwEdi/btWFpAa ZoFdTBJXvtwF6xYWaGKU2LLyEVi3iEAzo8S6b3vZIVrmMUp8WFoGYrMIqEicW32WGcTmFbCW uHbhKCvEug0cEuuajrGDrOMUCJT4fZQFpIZRQEzi+6k1TCA2s4C4xK0n85kg7haQWLLnPDOE LSrx8vE/VhBbVEBPYvnzNVBxRYn2pw2MEL0JEit//WSC2CsocXLmE5YJjKKzkIydhaRsFpIy iLiBxJFzN1khbG2JZQtfM0PY+hLzFmyAqrGWmNA6E0XNAkaOVYyixanFxbnpRkZ6qUWZycXF +Xl6eaklmxiBcX9wy2+rHYwHnzseYhTgYFTi4TWQ2h4hxJpYVlyZe4hRgoNZSYTXAJg0hHhT EiurUovy44tKc1KLDzFKc7AoifOarbwfLiSQnliSmp2aWpBaBJNl4uCUamDM2iR2v0Zw3dYm sdf5KlO3Jn452Rx9/cLmZ2d4O26d9NqS+nJ1q+nTgnS9q1dbpie7iyQJnl05K71czfGiK49r /zb32nuflu77X3h5scxLD5ZAq9UreyMutPkd3rt08dNDU/vtZJXn+xaZXu2sirjauMz9WK+p 3WrZAM/mKZ/rC6tEQhme65sqsRRnJBpqMRcVJwIAh9r+0/cCAAA=
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/cLjL5K_rDNN27FqedvZmv9U9j2k>
Cc: "mmusic-chairs@ietf.org" <mmusic-chairs@ietf.org>, "mmusic@ietf.org" <mmusic@ietf.org>, "fandreas@cisco.com" <fandreas@cisco.com>, Mirja Kuehlewind <ietf@kuehlewind.net>, The IESG <iesg@ietf.org>, "draft-ietf-mmusic-sctp-sdp@ietf.org" <draft-ietf-mmusic-sctp-sdp@ietf.org>
Subject: Re: [MMUSIC] =?cp1254?q?Mirja_K=FChlewind=27s_Discuss_on_draft-ietf-m?= =?cp1254?q?music-sctp-sdp-23=3A_=28with_DISCUSS=29?=
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, 02 Mar 2017 10:28:26 -0000

Hi,

There may be some minor editorial nits, but in general I am ok with the pull request.

Regards,

Christer

From: Roman Shpount <rshpount@turbobridge.com<mailto:rshpount@turbobridge.com>>
Date: Thursday 2 March 2017 at 07:25
To: Ben Campbell <ben@nostrum.com<mailto:ben@nostrum.com>>
Cc: Christer Holmberg <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.com>>, Mirja Kuehlewind <ietf@kuehlewind.net<mailto:ietf@kuehlewind.net>>, "mmusic-chairs@ietf.org<mailto:mmusic-chairs@ietf.org>" <mmusic-chairs@ietf.org<mailto:mmusic-chairs@ietf.org>>, Eric Rescorla <ekr@rtfm.com<mailto:ekr@rtfm.com>>, "mmusic@ietf.org<mailto:mmusic@ietf.org>" <mmusic@ietf.org<mailto:mmusic@ietf.org>>, Flemming Andreasen <fandreas@cisco.com<mailto:fandreas@cisco.com>>, "iesg@ietf.org<mailto:iesg@ietf.org>" <iesg@ietf.org<mailto:iesg@ietf.org>>, "draft-ietf-mmusic-sctp-sdp@ietf.org<mailto:draft-ietf-mmusic-sctp-sdp@ietf.org>" <draft-ietf-mmusic-sctp-sdp@ietf.org<mailto:draft-ietf-mmusic-sctp-sdp@ietf.org>>
Subject: Re: Mirja Kühlewind's Discuss on draft-ietf-mmusic-sctp-sdp-23: (with DISCUSS)

Ben,

I have submitted the pull request to address these comments: https://github.com/cdh4u/draft-sctp-sdp/pull/11

I hope that after Christer reviews and merges the pull request, we should have the latest set of comments addressed.

If we need more information about framing, I believe it should go into TCP/DTLS related draft, since all that draft-sctp-sdp is doing is reusing the same framing for exactly the same reasons.

Regards,

_____________
Roman Shpount

On Wed, Mar 1, 2017 at 9:57 PM, Ben Campbell <ben@nostrum.com<mailto:ben@nostrum.com>> wrote:
Hi all,

It seems like this conversation has not completed. What do we need to get to closure?

A few thoughts of my own:

- I'm not adverse to making non-ICE implementors look at the ICE specs for framing information, as long as the citations are precise enough that they don't need to read the entirety of ICE. (And the information is really there.)

- I am adverse to repeating normative text. I'm okay with adding informational text about non-ICE usage, as long as it is general enough to avoid confusion about where the authoritative text resides.

- If people think that ICE is not sufficiently specified, we can work on that. But I don't think the burden of doing that belongs to this draft.

- The draft is in fact IESG approved in its current state. Material changes should be kept to the minimum.


On 27 Feb 2017, at 7:06, Christer Holmberg wrote:

Hi,

...

Also I¹m not sure if the ICE part is fully specified. In your previously
mail you wrote

"As far as TCP/DTLS/SCTP transport tag is concerned, please note that ICE
end points are supposed to send a re-INVITE after nomination process is
completed with the selected candidate address in the m= line. So, if tcp
candidate is selected, re-INVITE must be sent with TCP/DTLS/SCTP
transport tag in the m= line. Also, any offers/answers after the ICE
nomination is complete, are supposed to send the currently selected
candidate in the m= line, which will also be TCP/DTLS/SCTP in case tcp
candidate is selected.³

>From what I understood from ekr, you might not in any case send an
re-invite; but maybe I understood this wrongly. I guess that could also
be further explained in the draft.

Ekr was talking about the specific re-INVITE that is sent directly after
ICE nomination. *Other* re-INVITEs can always be sent during the session.
But, that is not specific to this draft.

Regards,

Christer