Re: [rtcweb] Transports: RFC 6062 support

Magnus Westerlund <magnus.westerlund@ericsson.com> Wed, 12 March 2014 07:52 UTC

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Date: Wed, 12 Mar 2014 08:52:22 +0100
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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To: Justin Uberti <juberti@google.com>
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Subject: Re: [rtcweb] Transports: RFC 6062 support
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On 2014-03-12 01:58, Justin Uberti wrote:
> The reason I suggested SHOULD NOT is because I think this technique is
> unnecessary for WebRTC, and typically net harmful for the reasons that
> Matthew mentions. 
> 
> That said, I would be fine with saying MAY and including some
> explanatory text; my main concerns was to avoid the ambiguity that would
> arise from leaving this out altogether.

Okay, as we have considerations, I would leave the RFC 2119 terms out. I
think a statement along the lines of the below might be most suitable.

Using TURN to provide TCP relay candidates [REF] was considered but not
seen as providing any significant benefit. First, use of TURN TCP would
only be relevant in cases which both peers requires to use TCP to
establish a PeerConnection. Secondly, that use case is anyway supported
by both side establishing UDP relay candidates using TURN over TCP
[REF]. Thirdly, using TCP only between the endpoint and its relay may
result in less issues with TCP in regards to real-time constraints, e.g.
due to head of line blocking.

Please provide feedback or word smith.

Cheers

Magnus
(As individual)

> 
> 
> On Mon, Mar 10, 2014 at 8:33 AM, Magnus Westerlund
> <magnus.westerlund@ericsson.com <mailto:magnus.westerlund@ericsson.com>>
> wrote:
> 
>     On 2014-03-06 14:34, Simon Perreault wrote:
>     > Le 2014-03-06 13:23, Justin Uberti a écrit :
>     >> can we agree that TURN TCP candidates are a SHOULD NOT?
>     >
>     > Not a SHOULD, sure. SHOULD NOT, no.
>     >
> 
>     I would guess that the simplest is to remove discussion of TURN TCP
>     altogether from Transports. That would not recommend it nor make it
>     disallowed. If we want to be explicit, then simply motivate why we don't
>     believe it necessary.
> 
>     Justin, what is the reason you wanted SHOULD NOT?
> 
>     cheers
> 
>     Magnus Westerlund
> 
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> 


-- 

Magnus Westerlund

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Services, Media and Network features, Ericsson Research EAB/TXM
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