I have certain doubts regarding sending of sdp in 1xx/2xx in some scenarios.
Scenario 1. PRACK and 1xx (with answer)
<---- INVITE(with offer1)
1xx (with answer1) --->
<---- PRACK
200 ok (for PRACK) --->
Qs -- Now in the subsequent 1xx and 2xx responses, is it ok if no sdp is
sent? And if sdp has to be sent then can it be a new answer??
Scenario 2. PRACK and 1xx (with offer)
<---- INVITE(with no sdp)
1xx (with offer1) --->
<---- PRACK(with answer1)
200 ok (for PRACK) --->
Qs -- Now in the subsequent 1xx and 2xx responses, is it ok if no sdp is
sent? And if sdp has to be sent, then can it be a new offer??
RFC 3261 mandates same sdp to be sent in subsequent 1xx and 2xx, but that's
only if ealier sdp was sent in non-reliable responses. So, what should be
the case when PRACK is there?
Scenario 3. UPDATE and 1xx (non-reliable)
<---- INVITE(with
no sdp)
1xx (with offer1)(not reliable) --->
UPDATE --->
Qs -- Now the above UPDATE has to have a new offer or same offer1?
Thanks in advance
Rgds
Retesh
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