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Re: [rtcweb] Working Group Last Call: draft-ietf-rtcweb-jsep-19.txt

Magnus Westerlund <magnus.westerlund@ericsson.com> Fri, 24 March 2017 15:37 UTC

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To: Eric Rescorla <ekr@rtfm.com>
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CC: Ted Hardie <ted.ietf@gmail.com>, "rtcweb@ietf.org" <rtcweb@ietf.org>, Sean Turner <sean@sn3rd.com>, Cullen Jennings <fluffy@cisco.com>
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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Date: Fri, 24 Mar 2017 16:37:02 +0100
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Subject: Re: [rtcweb] Working Group Last Call: draft-ietf-rtcweb-jsep-19.txt
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Den 2017-03-24 kl. 16:17, skrev Eric Rescorla:
>
>
> On Fri, Mar 24, 2017 at 6:23 AM, Magnus Westerlund
> <magnus.westerlund@ericsson.com <mailto:magnus.westerlund@ericsson.com>>
> wrote:
>
>     2. Section 5.1.2:
>
>        o  The profile in any "m=" line in any answer MUST exactly match the
>           profile provided in the offer.
>
>        o  Any profile matching the following patterns MUST be accepted:
>           "RTP/[S]AVP[F]" and "(UDP/TCP)/TLS/RTP/SAVP[F]"
>
>     These two are in conflict in cases when the answer to an
>     "UDP/TLS/RTP/SAVPF" offer comes back as UDP/TLS/RTP/SAVP. Then the
>     first can't be fulfilled, but the second is. Isn't the rule "It
>     either is an exact match or matches the following patterns"?
>
>
> They are not in conflict. The first is about what you send. The second
> is about what you accept.
>

Ok, but the received vs send directionality is not at all clear in the 
first bullet. The accept in the second bullet, implies a received SDP. I 
would propose that the first bullet is ammended to include a "in any 
answer generated by the JSEP implementation MUST exactly ..." or similar.

Cheers

Magnus Westerlund

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