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Re: [rtcweb] Data Channel Negotiation and reopening of decisions

"Matthew Kaufman (SKYPE)" <matthew.kaufman@skype.net> Sat, 16 February 2013 15:30 UTC

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From: "Matthew Kaufman (SKYPE)" <matthew.kaufman@skype.net>
To: Randell Jesup <randell-ietf@jesup.org>
Thread-Topic: [rtcweb] Data Channel Negotiation and reopening of decisions
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Date: Sat, 16 Feb 2013 15:30:18 +0000
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Data Channel Negotiation and reopening of decisions
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You're right of course... I just can't keep straight which of the things are poor choices and which are reasonable choices that have been bastardized to the point of being poor choices.

If we're going to use SCTP, and it has perfectly good unidirectional channels, why can't we just expose those to users of the W3C WEBRTC API?

Apparently this "we built a simple protocol to allow us to set up bidirectional pairs of SCTP streams to create channels" isn't as simple as it first looked, so we should be revisiting the original assumption, not creating a complicated protocol just because we can.

Matthew Kaufman

Sent from my iPad

On Feb 15, 2013, at 10:40 PM, "Randell Jesup" <randell-ietf@jesup.org> wrote:

> On 2/15/2013 4:56 PM, Matthew Kaufman (SKYPE) wrote:
>> None if this would be a problem if we weren't making the mistake of using SCTP, which itself made the mistake of doing full-duplex channels instead of unidirectional channels with optional one-to-one or even many-to-one associations (as RTMFP has, as an example)
> 
> SCTP only has unidirectional streams.
> 
> If you're referring to the DataChannel protocol, there was a strong wish on the mailing list (and W3) for websockets-like bidirectional channels, so we built a simple protocol to allow us to set up bidirectional pairs of SCTP streams to create channels.
> 
> -- 
> Randell Jesup
> randell-ietf@jesup.org
> 
> _______________________________________________
> rtcweb mailing list
> rtcweb@ietf.org
> https://www.ietf.org/mailman/listinfo/rtcweb
>

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