Hi,
i am implenting early dialog in Sofia sip application using prack.
the application is stateless using NTA modul.

my application send invite with Supported header,receives 183 with RSeq.
then the applcation tries to send the PRACK message as shown below but it
fails

orq=nta_outgoing_prack(leg,      //leg created before sending the invite
   (nta_outgoing_t *)dialogue->orq,   // this is orq of INVITE message send
earlier using nta_outgoing_tcreate
   (nta_response_f *)sofia_sip_response,     //call back function for
receiving response
   (nta_outgoing_magic_t*)dialogue,                  //dialogue pointer that
is created after sending initial INVITE
   NULL,
   NULL,
   NTATAG_STATELESS(1),
  SIPTAG_RACK(pRackHdr), //added rack header
      TAG_END());

Kindly guide me to implement Prack .

Thanks
Vikas
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