The following in the discussion of 199 issues reminded me of a question
I have had for a long time. I'm changing the subject because it isn't
directly pertinent to the 199 discussion.
Christer Holmberg wrote:
What I mean to say is that when the UAC receives a final response for an
early dialog it normally releases all other early dialogs (the UAC
should of course still be ready to accept 200 OK responses for other
dialogs).
This has always been a fuzzy area to me. If the UAC is prepared to
retain multiple final dialogs if they happen, is it still expected to
release early dialog state for other dialogs when it receives the first
2xx? That could mean that subsequent 2xx responses can't be turned into
viable dialogs because state has been lost. (E.g. if preconditions were
being negotiated during the early dialog.)
Shouldn't the rule be that *if* the UAC is only intending to retain the
first final dialog then it should/may abandon all other early dialogs
when it receives a 2xx, but if it might want to keep additional dialogs
if additional 2xx responses are received, then it ought not drop the
early dialogs?
Thanks,
Paul
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