Re: [rtcweb] (no subject)

Christer Holmberg <christer.holmberg@ericsson.com> Sun, 18 May 2014 10:00 UTC

Return-Path: <christer.holmberg@ericsson.com>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 316491A02C0 for <rtcweb@ietfa.amsl.com>; Sun, 18 May 2014 03:00:20 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.201
X-Spam-Level:
X-Spam-Status: No, score=-4.201 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham
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 CLMkJoFVi3DS for <rtcweb@ietfa.amsl.com>; Sun, 18 May 2014 03:00:18 -0700 (PDT)
Received: from sesbmg23.ericsson.net (sesbmg23.ericsson.net [193.180.251.37]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id BCB241A02BC for <rtcweb@ietf.org>; Sun, 18 May 2014 03:00:17 -0700 (PDT)
X-AuditID: c1b4fb25-f798c6d000001521-52-537884af4fae
Received: from ESESSHC012.ericsson.se (Unknown_Domain [153.88.253.124]) by sesbmg23.ericsson.net (Symantec Mail Security) with SMTP id EF.0F.05409.FA488735; Sun, 18 May 2014 12:00:15 +0200 (CEST)
Received: from ESESSMB209.ericsson.se ([169.254.9.28]) by ESESSHC012.ericsson.se ([153.88.183.54]) with mapi id 14.03.0174.001; Sun, 18 May 2014 12:00:15 +0200
From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Cullen Jennings <fluffy@iii.ca>, Eric Rescorla <ekr@rtfm.com>
Thread-Topic: [rtcweb] (no subject)
Thread-Index: AQHPbZ4Z2+eaI/Y5N0+VRhbcwTiuTZtE/peAgAElxPA=
Date: Sun, 18 May 2014 10:00:15 +0000
Message-ID: <7594FB04B1934943A5C02806D1A2204B1D31BED8@ESESSMB209.ericsson.se>
References: <CABcZeBPVb+oKTozxrqvtftONTS=6u_2+zy10OejJi5-FhSXWDQ@mail.gmail.com> <B80350DC-7B01-46A7-AD30-A2B0BDD46522@iii.ca>
In-Reply-To: <B80350DC-7B01-46A7-AD30-A2B0BDD46522@iii.ca>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [153.88.183.149]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrBLMWRmVeSWpSXmKPExsUyM+Jvje76lopgg4ZPhhYrXp9jt/iw/gej xdp/7ewOzB5Llvxk8rh8/iOjx+THbcwBzFFcNimpOZllqUX6dglcGddnPWMq+M9fMe3pN/YG xvc8XYycHBICJhKrJ3QwQdhiEhfurWfrYuTiEBI4yihx9NgjVghnMaPE6Y61jF2MHBxsAhYS 3f+0QRpEBBwlFjzazAxiMwuoS9xZfI4dxBYWUJI4tf4zK0SNssTRV9OYIGwriQUnP7CA2CwC qhJvt35lBLF5BXwlFr76ALWrgVHi3802sCJOoIaLGxrBihiBrvt+ag0TxDJxiVtP5kNdLSCx ZM95ZghbVOLl43+sELaSxNrD21kg6nUkFuz+xAZha0ssW/iaGWKxoMTJmU9YJjCKzUIydhaS lllIWmYhaVnAyLKKUbQ4tTgpN93IWC+1KDO5uDg/Ty8vtWQTIzCqDm75rbqD8fIbx0OMAhyM Sjy8D26XBwuxJpYVV+YeYpTmYFES5729qzRYSCA9sSQ1OzW1ILUovqg0J7X4ECMTB6dUA6My 49rdjnmzGK1eP2K9sUxA0jt9UnYnb4PTGbnbE/nKP9ubvbX+UCVvGiS/bb/3UbNPcy78DjX7 Puf+v5vPl9Wn8cnw88ubld2v23u2i0PdU+/ZtqV333qfvSf/s3bbreN6lQ33/7tLXTumx3Q7 rmjL3Xztw3ODrqrm/nrrNl8nKINdQ3Gx0kIlluKMREMt5qLiRAA01DWgiwIAAA==
Archived-At: http://mailarchive.ietf.org/arch/msg/rtcweb/NTBNs9P2LttJVjHHfek7Y3hw-44
Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] (no subject)
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.15
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: <http://www.ietf.org/mail-archive/web/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: Sun, 18 May 2014 10:00:20 -0000

Hi,

I don't think we need to say anything. Because, if I receive session-level attributes on the wire, I should not have to move them around in my JS app before passing the SDP to JSEP. And vice verse.

Also keep in mind that the session vs media does not only affect SDP attributes - you have the same issue for the c= line.

Regards,

Christer

-----Original Message-----
From: rtcweb [mailto:rtcweb-bounces@ietf.org] On Behalf Of Cullen Jennings
Sent: 17 May 2014 21:28
To: Eric Rescorla
Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] (no subject)


as a purely pragmatic issue, some device seem to have SDP bugs that cause them to ignore some attributes at the session level. I don't really care what we do on this as mostly I think theses devices should fix their bugs but when people talk abut SDP interop issues, this is occasionally an issue that comes up. 

So I agree we need to have a SHOULD on saying where things go that could be at either a session level or a m= level. Session level makes more sense from a standards point of view but m= level might have slightly better interoperability. 

I don't care which we choose - perhaps some of the people that considerers themselves and experts on why SDP has interop problems could chime in on how important this is. 



On May 11, 2014, at 11:52 PM, Eric Rescorla <ekr@rtfm.com> wrote:

> https://github.com/rtcweb-wg/jsep/issues/19
> 
> JSEP S 5.2.1 reads:
> 
>    Attributes that are common between all m= sections MAY be moved to
>    session-level, if explicitly defined to be valid at session-level.
> 
> We should probably encourage this. I propose we make this a SHOULD 
> rather than a MAY.
> 
> -Ekr
> 
> _______________________________________________
> rtcweb mailing list
> rtcweb@ietf.org
> https://www.ietf.org/mailman/listinfo/rtcweb

_______________________________________________
rtcweb mailing list
rtcweb@ietf.org
https://www.ietf.org/mailman/listinfo/rtcweb