Re: [rtcweb] Isolating data channels (Re: Asking TLS for help with media isolation)

Mary Barnes <mary.ietf.barnes@gmail.com> Mon, 07 April 2014 19:32 UTC

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Date: Mon, 7 Apr 2014 14:32:08 -0500
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From: Mary Barnes <mary.ietf.barnes@gmail.com>
To: "Matthew Kaufman (SKYPE)" <matthew.kaufman@skype.net>
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Subject: Re: [rtcweb] Isolating data channels (Re: Asking TLS for help with media isolation)
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On Mon, Apr 7, 2014 at 2:27 PM, Matthew Kaufman (SKYPE) <
matthew.kaufman@skype.net> wrote:

> -----Original Message-----
> > From: rtcweb [mailto:rtcweb-bounces@ietf.org] On Behalf Of Paul Kyzivat
> > Sent: Monday, April 7, 2014 12:22 PM
> > To: rtcweb@ietf.org
> > Subject: Re: [rtcweb] Isolating data channels (Re: Asking TLS for help
> with
> > media isolation)
> >
> > On 4/7/14 1:27 PM, Matthew Kaufman (SKYPE) wrote:
> > >
> > > From: rtcweb [mailto:rtcweb-bounces@ietf.org] On Behalf Of Harald
> > >> Alvestrand
> > >> ...
> > >> (and to Matthew: At least we wouldn't have *yet* another congestion
> > >> context to manage, which would be the case with a separate TCP
> > connection.
> > >> There are always tradeoffs.)
> > >
> > > If it was me (and at one time, it was) I would use a protocol that
> allows for
> > multiplexing and prioritization of media and data channels over the same
> > secure session with shared congestion state. Over such a protocol,
> opening
> > another data stream for this purpose could be done immediately without
> > even a round trip.
> > >
> > > RFC 7016 documents such an approach.
> >
> > I see that the title starts with "Adobe's". Sigh.
>
> Yes, but there's little stopping many of these ideas from becoming the
> basis for an IETF-developed transport protocol that actually meets the
> needs we have here.
>

[MB] Except, maybe, IPR:

https://datatracker.ietf.org/ipr/search/?option=document_search&id=draft-thornburgh-adobe-rtmfp
[/MB]

> > If you want to entertain something other than existing solutions for
> media,
> > why not simply run the RTP media streams over SCTP along with the data
> > channels?
>
> Except for some critical shortcomings of SCTP (which are being fixed),
> this isn't actually a terrible idea.
>
> Matthew Kaufman
>
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