serverinvitesession.hxx

这是国外的resip协议栈

#if !defined(RESIP_SERVERINVITESESSION_HXX)
#define RESIP_SERVERINVITESESSION_HXX

#include "resip/dum/InviteSession.hxx"
#include "resip/stack/SipMessage.hxx"

#include <deque>

namespace resip
{

class ServerInviteSession: public InviteSession
{
   public:
      typedef Handle<ServerInviteSession> ServerInviteSessionHandle;
      ServerInviteSessionHandle getHandle();

      /** send a 3xx */
      void redirect(const NameAddrs& contacts, int code=302);

      /** send a 1xx - provisional response.  If you set earlyFlag to true, and have provided
          an answer, then DUM will attach the answer SDP to the provisional response, as an 
          early media indication */
      void provisional(int code=180, bool earlyFlag=true);
      
      /** Called to set the offer that will be used in the next message that
          sends an offer. If possible, this will synchronously send the
          appropriate request or response. In some cases, the UAS might have to
          call accept in order to cause the message to be sent. */
      virtual void provideOffer(const SdpContents& offer);
      virtual void provideOffer(const SdpContents& offer, DialogUsageManager::EncryptionLevel level, const SdpContents* alternative);

      /** Called to request that the far end provide an offer.  This will cause a 
          reinvite with no sdp to be sent.  */
      virtual void requestOffer();

      /** 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. So this can send a 488 to a
          reINVITE or UPDATE */
      virtual void reject(int statusCode, WarningCategory *warning = 0);

      /** accept an initial invite (2xx) - this is only applicable to the UAS */
      void accept(int statusCode=200);

      /**
       * Provide asynchronous method access by using command
       */
      void redirectCommand(const NameAddrs& contacts, int code=302);
      void provisionalCommand(int code=180);
      void acceptCommand(int statusCode=200);
      // !nash! following are provided by InviteSession
      //virtual void provideOfferCommand(const SdpContents& offer);
      //virtual void provideOfferCommand(const SdpContents& offer, DialogUsageManager::EncryptionLevel level, const SdpContents* alternative);
      //virtual void provideAnswerCommand(const SdpContents& answer);
      //virtual void rejectCommand(int statusCode, WarningCategory *warning = 0);

   private:
      friend class Dialog;

      virtual void dispatch(const SipMessage& msg);
      virtual void dispatch(const DumTimeout& timer);

      void dispatchStart(const SipMessage& msg);
      void dispatchOfferOrEarly(const SipMessage& msg);
      void dispatchAccepted(const SipMessage& msg);
      void dispatchWaitingToOffer(const SipMessage& msg);
      void dispatchWaitingToRequestOffer(const SipMessage& msg);
      void dispatchAcceptedWaitingAnswer(const SipMessage& msg);
      void dispatchOfferReliable(const SipMessage& msg);
      void dispatchNoOfferReliable(const SipMessage& msg);
      void dispatchFirstSentOfferReliable(const SipMessage& msg);
      void dispatchFirstEarlyReliable(const SipMessage& msg);
      void dispatchEarlyReliable(const SipMessage& msg);
      void dispatchSentUpdate(const SipMessage& msg);
      void dispatchSentUpdateAccepted(const SipMessage& msg);
      void dispatchReceivedUpdate(const SipMessage& msg);
      void dispatchReceivedUpdateWaitingAnswer(const SipMessage& msg);
      void dispatchWaitingToTerminate(const SipMessage& msg);
      void dispatchWaitingToHangup(const SipMessage& msg);

      void dispatchCancel(const SipMessage& msg);
      void dispatchBye(const SipMessage& msg);
      void dispatchUnknown(const SipMessage& msg);

      // utilities
      void startRetransmit1xxTimer();
      void sendAccept(int code, Contents* sdp); // sends 2xxI
      void sendProvisional(int code, bool earlyFlag);
      void sendUpdate(const SdpContents& sdp);

      ServerInviteSession(DialogUsageManager& dum, Dialog& dialog, const SipMessage& msg);

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

      // stores the original request
      const SipMessage mFirstRequest;
      SharedPtr<SipMessage> m1xx; // for 1xx retransmissions
      unsigned long mCurrentRetransmit1xx;
      
      //std::deque<SipMessage> mUnacknowledgedProvisionals; // all of them
      //SipMessage m200; // for retransmission
};

}

#endif

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