Re: [rtcweb] Clarification on offer/answer in jsep-01

Justin Uberti <juberti@google.com> Wed, 29 August 2012 07:31 UTC

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From: Justin Uberti <juberti@google.com>
Date: Wed, 29 Aug 2012 00:31:24 -0700
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To: Cullen Jennings <fluffy@iii.ca>
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Clarification on offer/answer in jsep-01
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The text here is incorrect, this was a mistake on my part. While this usage
is technically permissible if you can deal with the complications it
introduces, it is not compliant with RFC 3264, as has been pointed out.

What I meant to say here was that the local description can be updated even
after an initial local description has been specified. There are real-world
use cases for this, such as setting an initial local description to tell
the ICE Agent the number of m= lines to gather candidates for, followed by
a later update when the getUserMedia MediaStream has been obtained. The
offer would not actually be sent until after the updated local description
has been appliced, so this would not violate 3264.


On Tue, Aug 28, 2012 at 5:57 AM, Cullen Jennings <fluffy@iii.ca> wrote:

>
> On Aug 27, 2012, at 10:48 PM, Francois Audet <francois.audet@skype.net>
> wrote:
>
> >> "As in [RFC3264], an offerer can send an offer, and update it as long
> >> as it has not been answered."
>
> yah that won't work or all the reasons mentioned before and in my opinion
> does not represent the WG consensus. BTW - that was added in the -01
> version of the draft and submitted without me ever seeing it - I'd be happy
> to fix it but I don't have the source for the draft. Chairs?
>
>
>
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