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Re: [MMUSIC] UP: Can a partial offer be a full offer?

Paul Kyzivat <pkyzivat@alum.mit.edu> Wed, 21 August 2013 13:34 UTC

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Date: Wed, 21 Aug 2013 09:34:13 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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To: Christer Holmberg <christer.holmberg@ericsson.com>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [MMUSIC] UP: Can a partial offer be a full offer?
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On 8/21/13 2:19 AM, Christer Holmberg wrote:
> Hi,
>
>>> MAYBE we could restrict usage of POF/PANs, and say that they MUST NOT be used to change session level information...
>>
>> I was assuming it was obvious that this must not be the case.
>> The POFs and PANs (AFAIK) only contain the media sections they intend to change, so they don't contain the session level stuff.
>> If you change session level stuff, then you should need a real offer.
>
> Keep in mind that the o- line, which IS session level, IS modified each time a POF/PAN is sent.

Good point.

> Maybe we should use media level o- lines for POFs/PANs....

I don't know how you could do that in a backward compatible way.

	Thanks,
	Paul

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