//Editor-Info: -*- C++ -*-
//
//Subject: TOVE project / SIG
//
//File: sigstate_null.h
//
//Version: $Revision: 1.1 $
//
//State: $State: Exp $
//
//Date: $Date: 1998/11/11 13:29:36 $
//
//Organisation:
//      Helsinki University of Technology
//      Laboratory of Telecommunications Software and Multimedia
//
//Author:
//      Sami Raatikainen
//
//Description:
//      Implements the following signalling states based on Q.2931:
//      UserNull, NetworkNull, and Idle state for BISUP.
//
//Copyright:
//      Copyright 1999 Helsinki University of Technology
//      ALL RIGHTS RESERVED BETWEEN JANUARY 1996 AND JUNE 1999.
//
//Licence:
//
//
//History: 

#ifndef __SIG_SIGSTATE_NULL_H__
#define __SIG_SIGSTATE_NULL_H__

#include "pf/exception.h"

#include "sigstate.h"

class sigNull : public sigState
{
    public:
        static sigNull *instance(void);

        virtual void sigSETUPreqAct(sigSETUPreq *primitive_,
                                    pfProtocol *protocol_);
         
        virtual void sigSETUPindAct(sigSETUPind *primitive_,
                                    pfProtocol *protocol_);

                // Methods to reset following inputs
        virtual void sigRELEASEreqAct(sigRELEASEreq *primitive_,
                                      pfProtocol *protocol_);
        virtual void sigPROCEEDINGindAct(sigPROCEEDINGind *primitive_,
                                              pfProtocol *protocol_);
        virtual void sigSETUPconfAct(sigSETUPconf *primitive_,
                                      pfProtocol *protocol_);
        virtual void sigSETUP_COMPLETEindAct(sigSETUP_COMPLETEind *primitive_,
                                          pfProtocol *protocol_);
        virtual void sigRELEASEindAct(sigRELEASEind *primitive_,
                                      pfProtocol *protocol_);
        virtual void sigRELEASEconfAct(
            sigRELEASEconf *primitive_,
            pfProtocol *protocol_);


    protected:
        sigNull(void);
        virtual ~sigNull(void);

    private:
        static sigNull *_only;
};

#endif // __SIG_SIGSTATE_NULL_H__