I got queried about this when an interop problem popped up.
I know what I think the right answer is, but want to check what others
think.
Here is the case:
Alice calls Bob:
INVITE ...
From: <sip:al...@atlanta.com>;tag=aaaa;foo=bar
this succeeds and a dialog is established.
Then, within that dialog, Bob sends a request to Alice. E.g.
INVITE ...
To: <sip:al...@atlanta.com>;tag=aaaa
Question is: Should the To in that (re)INVITE contain ';foo=bar' ???
AFAIK the contents of that To header are to be generated from dialog
state information. The URI and the tag are part of that state, but other
header parameters from the original INVITE are not, and hence would not
be available for the addressing of subsequent messages.
Does anyone have a different opinion?
If so, can you justify it?
Thanks,
Paul
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