Re: [MMUSIC] Is ice-mismatch media or session level?

Flemming Andreasen <fandreas@cisco.com> Thu, 16 May 2019 03:53 UTC

Return-Path: <fandreas@cisco.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 01BC41200FF for <mmusic@ietfa.amsl.com>; Wed, 15 May 2019 20:53:18 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -14.509
X-Spam-Level:
X-Spam-Status: No, score=-14.509 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_DKIMWL_WL_HIGH=-0.01, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.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 yb5A2AA31NGS for <mmusic@ietfa.amsl.com>; Wed, 15 May 2019 20:53:15 -0700 (PDT)
Received: from rcdn-iport-3.cisco.com (rcdn-iport-3.cisco.com [173.37.86.74]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id CE5C2120091 for <mmusic@ietf.org>; Wed, 15 May 2019 20:53:14 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=16802; q=dns/txt; s=iport; t=1557978794; x=1559188394; h=subject:to:cc:references:from:message-id:date: mime-version:in-reply-to; bh=9OZ+kPaBgWmHGOccyeY8ecbEKD6IWS344vOHcWEI+yI=; b=jg605YyzWygWuPhTogDvjMxEFhznhfJXlyojzYmaMsV5xVTe7A1J1Jq8 SRLrbv8z/mRHhu0OPgBkd1wxPlutDLsTglt3k6jaORJ7ijYvldWO3ImLW YQunc1AtLf9qbZSNS3pmZwy4pn8I0Xz5zXgms/RUpDizRbHlWkNsJygZO Y=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0AdAAD13dxc/4wNJK1kGwEBAQEDAQE?= =?us-ascii?q?BBwMBAQGBUwQBAQELAYEOgQJpUTMohBGTB4FgLYlNiQuFe4F7CQEBAQ4YAQo?= =?us-ascii?q?MAQGDCXFGAoIrIzYHDgEDAQEEAQECAQRtHAyFSgEBAQMBAQEhSwsQCxgnAwI?= =?us-ascii?q?CJx8RBg0GAgEBgx4BgXYFDw+rOIEvH4UogyiBQAaBMwGLTheBQD+BOII9Lj6?= =?us-ascii?q?CYQEBAgGEaIJYBItQh1GUOAmCC4YhjDcGG4IUhkyDTolAkwyOWoFWDiOBV00?= =?us-ascii?q?jFTuCbIFrMBeIYIVbIwMwAQGQbQEB?=
X-IronPort-AV: E=Sophos;i="5.60,475,1549929600"; d="scan'208,217";a="548387271"
Received: from alln-core-7.cisco.com ([173.36.13.140]) by rcdn-iport-3.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 16 May 2019 03:53:11 +0000
Received: from [10.24.18.121] ([10.24.18.121]) by alln-core-7.cisco.com (8.15.2/8.15.2) with ESMTP id x4G3rAuQ010280; Thu, 16 May 2019 03:53:11 GMT
To: Suhas Nandakumar <suhasietf@gmail.com>
Cc: Christer Holmberg <christer.holmberg@ericsson.com>, mmusic WG <mmusic@ietf.org>
References: <CAD5OKxvGcC0inLRxwTHKdWW3z6xM2PWjV=1J8+3_zwQsF3tCaA@mail.gmail.com> <HE1PR07MB3161E1BDB1E2439E1A9CE785933F0@HE1PR07MB3161.eurprd07.prod.outlook.com> <CAD5OKxtqKi1ucRXd5xrZrsM6hiqu=FUULx3mQv+=bZx3YHMbLg@mail.gmail.com> <310293b1-0fbf-9b74-03ca-63ad8d4b80bd@cisco.com> <CAMRcRGSyWB3O04CDOUx1oXtyL=AyB--dM-e+ABfm2dN16RK7sw@mail.gmail.com> <222e6d5f-dcca-56c8-095d-e8ca96b1948b@cisco.com> <CAMRcRGQYuv0M5pcrjAfFLUk5J4VcGMAMm_hSTWB+k=ackcxbZQ@mail.gmail.com>
From: Flemming Andreasen <fandreas@cisco.com>
Message-ID: <e3523821-b7bf-0d1b-7b10-d38b64e4110c@cisco.com>
Date: Wed, 15 May 2019 23:53:08 -0400
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.6.1
MIME-Version: 1.0
In-Reply-To: <CAMRcRGQYuv0M5pcrjAfFLUk5J4VcGMAMm_hSTWB+k=ackcxbZQ@mail.gmail.com>
Content-Type: multipart/alternative; boundary="------------70D83EBC6C19C02550E354B0"
Content-Language: en-US
X-Outbound-SMTP-Client: 10.24.18.121, [10.24.18.121]
X-Outbound-Node: alln-core-7.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/rR55-6zHQMC-xwSjAGj79E5ntH4>
Subject: Re: [MMUSIC] Is ice-mismatch media or session level?
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: Thu, 16 May 2019 03:53:18 -0000


On 5/15/19 3:59 AM, Suhas Nandakumar wrote:
>
> On Mon, May 13, 2019 at 9:26 AM Flemming Andreasen <fandreas@cisco.com 
> <mailto:fandreas@cisco.com>> wrote:
>
>
>
>     On 5/13/19 1:22 AM, Suhas Nandakumar wrote:
>>     I am inclined to leave it as media-level attribute. I am not sure
>>     what more clarification is needed in the text today ?
>     Are the clarifications Roman suggested below already included ?
>
>
>
> I am finding it hard to parse suggested clarification. I am sure I am 
> missing something.
Roman suggested ice-mismatch should be defined for both media- and 
session-level.

Looking further at the current text, I'm not sure I agree since there 
really isn't any normative behavior associated with receiving 
ice-mismatch. Thus, I'd suggest simply keeping it as-is and media-level 
only.

-- Flemming


>
>
>     Thanks
>
>     -- Flemming
>>
>>     On Sun, May 12, 2019 at 8:41 PM Flemming Andreasen
>>     <fandreas@cisco.com <mailto:fandreas@cisco.com>> wrote:
>>
>>         Based on the errata, it seems like the intent was for to be
>>         media-level. I'd suggest we keep it that way and add the
>>         clarifications you outline below.
>>
>>         If people feel otherwise, please speak up no later than May 19.
>>
>>         Thanks
>>
>>         -- Flemming (with chair hat on)
>>
>>
>>
>>         On 4/29/19 4:44 PM, Roman Shpount wrote:
>>>         Hi Christer,
>>>
>>>         Thank you for reviewing and responding.
>>>
>>>         On Sat, Apr 27, 2019 at 1:48 PM Christer Holmberg
>>>         <christer.holmberg@ericsson.com
>>>         <mailto:christer.holmberg@ericsson.com>> wrote:
>>>
>>>             Before we just change something back we need to think
>>>             what the reason for the change to media-level was. Could
>>>             it be related to RTCWEB?
>>>
>>>
>>>
>>>         This is definitely not RTCWEB related, since RTCWEB should
>>>         never generate ice-mismatch or use it for any reason.
>>>
>>>         The ice-mismatch attribute was session only according to RFC
>>>         5245 Section 21.1.4
>>>         (https://tools.ietf.org/html/rfc5245#section-21.1.4). At the
>>>         same time, according to RFC 5245 Section 15..3
>>>         (https://tools.ietf.org/html/rfc5245#section-15.3),
>>>         ice-mismatch is media level attribute only. This being said,
>>>         according to RFC 5245 Section 6.1
>>>         (https://tools.ietf.org/html/rfc5245#section-6.1),
>>>         ice-mismatch applies to the whole session, but it is
>>>         specified per m= line. According to errata 3149
>>>         (https://www.rfc-editor.org/errata/eid3149), ice-mismatch
>>>         should be media level. So, it is a bit of a mess.
>>>
>>>         I can change ice-mismatch back to media level, but what we
>>>         need to clarify then is the following: If ice-mismatch is
>>>         present in the m= line, does it stop ICE processing for the
>>>         whole session or for this m= line only?
>>>
>>>         If it stops ICE processing for the whole session then it
>>>         makes little or no sense being specified per m= line. If it
>>>         only stops processing for specific m= line, then
>>>         ice-mismatch probably also makes sense at the session level
>>>         to stop ICE processing for the whole session.
>>>
>>>         I am definitely open to input here.
>>>         _____________
>>>         Roman Shpount
>>>
>>>         _______________________________________________
>>>         mmusic mailing list
>>>         mmusic@ietf.org  <mailto:mmusic@ietf.org>
>>>         https://www.ietf..org/mailman/listinfo/mmusic  <https://www.ietf.org/mailman/listinfo/mmusic>
>>
>>         _______________________________________________
>>         mmusic mailing list
>>         mmusic@ietf.org <mailto:mmusic@ietf.org>
>>         https://www.ietf.org/mailman/listinfo/mmusic
>>
>>
>>     _______________________________________________
>>     mmusic mailing list
>>     mmusic@ietf.org  <mailto:mmusic@ietf.org>
>>     https://www.ietf.org/mailman/listinfo/mmusic
>