Christer Holmberg wrote:
11) I can't follow the second paragraph of section 9 at all. Can you
rephrase it?
Once I know what its trying to say, I'll propose alternate text.
What it is supposed to say is that you cannot send a 199 if you are
required (by the offer/answer rules) to include SDP.
Thinking about this further...
This means that a proxy must track the o/a state of the dialog usage in
order to know whether it can send a 199 or not. That could be a
considerable burden. It requires maintaining partial dialog state rather
than simply transaction state, and also requires more parsing of
messages and potentially message bodies. (E.g. with multipart.)
This has me again questioning the cost/benefit tradeoff of the whole
thing. Of course in this case the cost is to the proxy, and the benefit
is to the UAC.
Paul
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