clientinvitesession.hxx

这是国外的resip协议栈

#if !defined(RESIP_CLIENTINVITESESSION_HXX)
#define RESIP_CLIENTINVITESESSION_HXX

#include "resip/dum/InviteSession.hxx"
#include "resip/dum/Handles.hxx"

namespace resip
{
class SipMessage;
class SdpContents;

class ClientInviteSession : public InviteSession
{
   public:
      ClientInviteSession(DialogUsageManager& dum,
                          Dialog& dialog,
                          SharedPtr<SipMessage> request,
                          const Contents* initialOffer,
                          DialogUsageManager::EncryptionLevel level,
                          ServerSubscriptionHandle serverSub = ServerSubscriptionHandle::NotValid());

      ClientInviteSessionHandle getHandle();

   public:
      /** Called to set the offer that will be used in the next message that
          sends an offer.  For a UAC in an early dialog, this can be used to send
          an UPDATE request with an SDP offer. */
      virtual void provideOffer (const SdpContents& offer);
      virtual void provideOffer(const SdpContents& offer, DialogUsageManager::EncryptionLevel level, const SdpContents* alternative);

      /** Similar to provideOffer - called to set the answer to be signalled to
          the peer. May result in message being sent synchronously depending on
          the state. */
      virtual void provideAnswer (const SdpContents& answer);

      /** Makes the specific dialog end. Will send a BYE (not a CANCEL) */
      virtual void end(EndReason reason);
      virtual void end();

      /** Rejects an offer at the SIP level.  For a UAC in an early dialog 
          this typically only makes sense, when rejecting an UPDATE request
          that contains an offer in an early dialog. */
      virtual void reject (int statusCode, WarningCategory *warning = 0);

      const SdpContents& getEarlyMedia() const;
      
   private:
      virtual void dispatch(const SipMessage& msg);
      virtual void dispatch(const DumTimeout& timer);

      void dispatchStart (const SipMessage& msg);
      void dispatchEarly (const SipMessage& msg);
      void dispatchEarlyWithOffer (const SipMessage& msg);
      void dispatchEarlyWithAnswer (const SipMessage& msg);
      void dispatchAnswered (const SipMessage& msg);
      void dispatchSentUpdateEarly (const SipMessage& msg);
      void dispatchSentUpdateEarlyGlare (const SipMessage& msg);
      void dispatchReceivedUpdateEarly (const SipMessage& msg);
      void dispatchSentAnswer (const SipMessage& msg);
      void dispatchQueuedUpdate (const SipMessage& msg);
      void dispatchCancelled (const SipMessage& msg);

      void handleRedirect (const SipMessage& msg);
      void handleProvisional (const SipMessage& msg);
      void handleFinalResponse (const SipMessage& msg);
      void handleOffer (const SipMessage& msg, const SdpContents& sdp);
      void handleAnswer (const SipMessage& msg, const SdpContents& sdp);
      void sendPrackIfNeeded(const SipMessage& msg);
      void sendPrack(const SdpContents& sdp);
      
      // Called by the DialogSet (friend) when the app has CANCELed the request
      void cancel();

      // Called by the DialogSet when it receives a 2xx response
      void onForkAccepted();

      bool checkRseq(const SipMessage& msg);
   private:
      std::auto_ptr<SdpContents> mEarlyMedia;
      void startCancelTimer();
      void startStaleCallTimer();
      void sendSipFrag(const SipMessage& response);

      RAckCategory mRelRespInfo;
      unsigned int mStaleCallTimerSeq;
      unsigned int mCancelledTimerSeq;      
      ServerSubscriptionHandle mServerSub;

      // disabled
      ClientInviteSession(const ClientInviteSession&);
      ClientInviteSession& operator=(const ClientInviteSession&);

      friend class Dialog;
};

}

#endif

/* ====================================================================
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