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Re: [rtcweb] Fwd: New Version Notification for draft-thomson-rtcweb-alpn-00.txt

Martin Thomson <martin.thomson@gmail.com> Wed, 09 April 2014 19:52 UTC

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Date: Wed, 09 Apr 2014 12:52:42 -0700
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From: Martin Thomson <martin.thomson@gmail.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [rtcweb] Fwd: New Version Notification for draft-thomson-rtcweb-alpn-00.txt
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On 9 April 2014 12:12, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
> But what is the *protocol*? I don't see that mentioned in the draft at all.

There are two.  Those two are described (perhaps not explicitly
enough) in the list in Section 2.

> IIUC it must be the multiplexing of STUN, SRTP, and SCTP over DTLS. (Maybe
> not STUN - maybe that is *below* or *beside* DTLS.) I see how it could make
> sense to use ALPN to verify that this is the intended use of the DTLS
> session. But that isn't even mentioned in the draft.

Yeah, STUN isn't inside DTLS, so it doesn't make a lot of sense to
"negotiate" its use.

> And, from a protocol perspective, what is the difference between webrtc and
> c-webrtc? AFAICT this is just two different usages of the same "protocol",
> not two different protocols.

Yep.  But that's what a protocol is.

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