[reSIProcate] on a UAS based on the DUM: Not able to send SDP data Answer in a provisional response

["Bellanger Julien" <julien.bellanger@xxxxxxxxxxxxx>]

Hi,

 

 

I have made an UAS based on the DUM API. When I received an INVITE request
with SDP data, I try to provide an answer to these SDP data in the
provisional response
message SIP/180.
So just before to call the ServerInviteSession::provisional() method, I'm
calling the
ServerInviteSession::provideAnswer() with my SDP data. The problem is that
my SDP data are not sent in the SIP/180 message, they are are sent after in
the
SIP/200 response when I call the accept() method.

After having a look to the code, I think to understand why:

- the ServerInviteSession::provideAnswer() store the SDP content in the
InviteSession::mCurrentLocalSdp member and set the InviteSession::mState
of the call to UAS_OfferProvidedAnswer.

- ServerInviteSession::provisional() call the sendprovisional() method which
always test
and use the InviteSession::mProposedLocalSdp member to eventually send SDP
content
in the provsional response message. But the mProposedLocalSdp is set when we
call
the provideOffer() method but not when the call the provideAnswer() method.

I think the sendprovisional() should test the mState of the Call to know if
it has
to use the mProposedLocalSdp Content or the mCurrentLocalSdp.

Are you agree with that, or am I in a wrong way ?

Thanks in advance,

Julien

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