Re: [MMUSIC] [rtcweb] Scope of SDP m= line 'webrtc-datachannel'

Cullen Jennings <fluffy@iii.ca> Mon, 22 April 2019 19:21 UTC

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From: Cullen Jennings <fluffy@iii.ca>
In-Reply-To: <62f7a5fe-a78e-4c80-cc96-e73b18c12629@cisco.com>
Date: Mon, 22 Apr 2019 13:21:34 -0600
Cc: Christer Holmberg <christer.holmberg@ericsson.com>
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Subject: Re: [MMUSIC] [rtcweb] Scope of SDP m= line 'webrtc-datachannel'
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The change in Christer's PR looks good to me. 


> On Apr 22, 2019, at 1:08 PM, Flemming Andreasen <fandreas@cisco.com>; wrote:
> 
> Folks
> 
> Please take a look at the proposed update below and let the authors and MMUSIC chairs know if you have any concerns with this change (by April 29). 
> 
> Thanks 
> 
> -- Flemming (as MMUSIC co-chair)
> 
> On 4/21/19 7:12 PM, Christer Holmberg wrote:
>> Hi,
>>  
>> I am cross-posting this on multiple list, to make people aware of the issue. However, I ask that any comments and discussions take place on the MMUSIC list only.
>>  
>> I found the following statement in section 4.5 of draft-ietf-mmusic-sctp-sdp:
>>  
>>    “NOTE: 'webrtc-datachannel' indicates the WebRTC Data Channel
>>    Establishment Protocol defined in [I-D.ietf-rtcweb-data-protocol].”
>>  
>> In addition, in the IANA registration of ‘webrtc-datachannel’ (section 15.3), draft-ietf-rtcweb-data-protocol is referenced.
>>  
>> To refresh everyone, draft-ietf-rtcweb-data-protocol defines DCEP (the inband protocol for handling WebRTC Data Channels), and ‘webrtc-datachannel’ is used in the SDP m= line when establishing an SCTP association for such channel.
>>  
>> However, both draft-ietf-mmusic-datachannel-sdp-neg and draft-ietf-clue-data-channel use ‘webrtc-datachannel’ in the “m=” line, and those drafts do not use DCEP.
>>  
>> My suggestion to fix this is to modify the text in draft-ietf-mmusic-sctp-sdp, to always use             ‘webrtc-datachannel’ for WebRTC Data Channels – no matter whether DCEP is used or not.
>>  
>> I have created a pull request:
>>  
>> https://github.com/cdh4u/draft-sctp-sdp/pull/15 <https://github.com/cdh4u/draft-sctp-sdp/pull/15>
>>  
>> Regards,
>>  
>> Christer
>>  
>>  
>>  
>> 
>> 
>> _______________________________________________
>> rtcweb mailing list
>> rtcweb@ietf.org <mailto:rtcweb@ietf.org>
>> https://www.ietf.org/mailman/listinfo/rtcweb <https://www.ietf.org/mailman/listinfo/rtcweb>
> 
> _______________________________________________
> rtcweb mailing list
> rtcweb@ietf.org
> https://www.ietf.org/mailman/listinfo/rtcweb