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Re: [clue] FW: draft-ejzak-mmusic-data-channel-sdpneg and DCEP

Christer Holmberg <christer.holmberg@ericsson.com> Tue, 25 November 2014 19:17 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>, "clue@ietf.org" <clue@ietf.org>
Thread-Topic: [clue] FW: draft-ejzak-mmusic-data-channel-sdpneg and DCEP
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Archived-At: http://mailarchive.ietf.org/arch/msg/clue/ZZdw5pKTTCKJeFodpWYefWlgwyY
Subject: Re: [clue] FW: draft-ejzak-mmusic-data-channel-sdpneg and DCEP
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Hi,

I agree with Paul.

But, the question is still whether the CLUE data channel spec ahould still define the DCEP code point for the CLUE data channel, IF someone e.g. want to specify usage of CLUE in a non-O/A environment.

Regards,

Christer

Sent from my Windows Phone
________________________________
From: Paul Kyzivat<mailto:pkyzivat@alum.mit.edu>
Sent: ‎25/‎11/‎2014 20:43
To: clue@ietf.org<mailto:clue@ietf.org>
Subject: Re: [clue] FW: draft-ejzak-mmusic-data-channel-sdpneg and DCEP

On 11/25/14 7:00 AM, Makaraju, Maridi Raju (Raju) wrote:
>
>> Hi,
>>
>>>> If you provide the SCTP port in the WebRTC API, then DCEP won't be used.
>>> You meant "(stream) id" instead of "SCTP port"?
>>
>> Yes.
>>
>>> In WebRTC API createDataChannel(), use of DCEP is controlled by using
>> "negotiated" parameter. (Stream) id specification only determines the stream
>> id to be used.
>>
>> Ok. But, the point is that you can create a data channel without DCEP.
> [Raju]
> IMHO, I am in favor of not mandating DCEP for non-WebRTC device CLUE usage. Furthermore, to be consistent it may be better not to use DCEP even when CLUE is used by a WebRTC device.

If we mandate using draft-ejzak for establishing the clue channel, then
DCEP won't be *used*. I think we simply make a requirement for support
of draft-ietf-rtcweb-data-channel, and don't mention
draft-ietf-rtcweb-data-protocol. If there are dependencies between those
two, then that is not our problem. (I thought data-channel had a
dependency on data-protocol, but I don't see it now, which is a good thing.)

        Thanks,
        Paul

> BR
> Raju
>
>>
>> Regards,
>>
>> Christer
>>
>>
>>
>>> -----Original Message-----
>>> From: clue [mailto:clue-bounces@ietf.org] On Behalf Of Christer
>>> Holmberg
>>> Sent: Tuesday, November 25, 2014 5:24 AM
>>> To: Christian Groves; clue@ietf.org
>>> Subject: Re: [clue] FW: draft-ejzak-mmusic-data-channel-sdpneg and
>>> DCEP
>>>
>>> Hi,
>>>
>>> If I understood Paul's comment, DCEP is not required for compatibility
>>> with WebRTC endpoints. If you provide the SCTP port in the WebRTC API,
>>> then DCEP won't be used.
>>>
>>> The question is really whether we want to mandate non-WebRTC CLUE
>>> devices to implement DCEP or not.
>>>
>>> Regards,
>>>
>>> Christer
> _______________________________________________
> clue mailing list
> clue@ietf.org
> https://www.ietf.org/mailman/listinfo/clue
>

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