[reSIProcate] UAC PRACK Support

[Jason Fischl]

On 6/14/07, Nilay Tripathi <nilay.linux at gmail.com> wrote:
> Hi,
>
> I was just going through the PRACK code, for UAC, in the "main". I want to
> share some views about the level of control we can provide to the
> application layer from DUM, in wake of the SDP negotiation.
>
> It looks like DUM would take care of its own of sending PRACK for a reliable
> 1xx using function sendPrackIfNeeded().
> Even as a UAC only, the case where the application wants to send an SDP
> Offer or an Answer in the PRACK is not possible currently. For this kind of
> control, application layer should be able to trigger the PRACK (with or
> without SDP) using appropriate APIs.
>
Sending PRACK is completely taken care of by the stack. The
application only enables reliable provisional responses.

If the application (TU) calls InviteSession::provideOffer in an early
dialog, the stack will use PRACK, 200/OK or UPDATE as needed to
transport the offer.

> Also, the application should be able to choose the method to use
> (UPDATE/Re-INVITE) for sending a new SDP Offer.
>
The use of UPDATE vs re-INVITE is handled by the stack. If you enable
the UPDATE method and the peer supports UPDATE, dum will use UPDATE
instead of reINVITE.

> I would appreciate your thoughts on this.
>
> Thanks 'n' Regards,
> Nilay
>
>
>
> On 6/10/07, Derek MacDonald <derek at counterpath.com> wrote:
> > I merged UAC PRACK support in to main; see MasterProfile.hxx for
> > "documentation".  I also reverted the Security change which allowed
> > server auth to be disabled. I'll be off net for a couple of weeks, but
> > more documentation/etc. when I get back.
> >
> > -Derek
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>
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