[reSIProcate] support for Offer/Answer model

[Giuseppe Teresi <giuseppe.teresi@xxxxxxxxxxxx>]

Hi all,

I wish to implement the Offer/Answer model on my User Agent.
I have added the support of PRACK Method calling MasterProfile::addSupportedMethod(PRACK),� then I have added� MasterProfile::addSupportedOptionTag(Token("100rel")) on the constructor of the main class and SipMessage::header(h_Requires).push_front(Token("100rel")) to insert the header Require in the INVITE method.

If I use the UA with an other UA wich require the support of reliable provisional response, the SIP stack doesn't send the PRACK,
How can I correctly implement this model?

thanks.