bool _moreMessagesToSend;
    bool _statusReportQualifier;
    unsigned char _messageReference;
    Address _recipientAddress;
    Timestamp _serviceCentreTimestamp;
    Timestamp _dischargeTime;
    unsigned char _status;      // octet
    
    // initialize members to sensible values
    void init();
    
  public:
    // constructor, sets sensible default values
    SMSStatusReportMessage() {init();}

    // constructor with given pdu
    SMSStatusReportMessage(string pdu) throw(GsmException);

    // encode pdu, return hexadecimal pdu string
    virtual string encode();

    // create textual representation of SMS
    virtual string toString() const;

    // inherited from SMSMessage
    Address address() const;
    Ref<SMSMessage> clone();

    // accessor functions
    bool moreMessagesToSend() const {return _moreMessagesToSend;}
    bool statusReportQualifier() const {return _statusReportQualifier;}
    unsigned char messageReference() const {return _messageReference;}
    Address recipientAddress() const {return _recipientAddress;}
    Timestamp serviceCentreTimestamp() const {return _serviceCentreTimestamp;}
    Timestamp dischargeTime() const {return _dischargeTime;}
    unsigned char status() const {return _status;}
    
    void setMoreMessagesToSend(bool x) {_moreMessagesToSend = x;}
    void setStatusReportQualifier(bool x) {_statusReportQualifier = x;}
    void setMessageReference(unsigned char x) {_messageReference = x;}
    void setRecipientAddress(Address x) {_recipientAddress = x;}
    void setServiceCentreTimestamp(Timestamp x) {_serviceCentreTimestamp = x;}
    void setDischargeTime(Timestamp x) {_serviceCentreTimestamp = x;}
    void setStatus(unsigned char x) {_status = x;}

    virtual ~SMSStatusReportMessage() {}
  };

  // SMS-COMMAND TPDU
  class SMSCommandMessage : public SMSMessage
  {
  public:
    // command types, other values are reserved or SC-specific
    enum CommandType {EnquireSM = 0, CancelStatusReportRequest = 1,
                      DeleteSubmittedSM = 2, EnalbeStatusReportRequest = 3};

  private:
    // SMS-COMMAND PDU (see GSM 03.40 section 9.2.2.4)
    unsigned char _messageReference;
    bool _statusReportRequest;
    unsigned char _protocolIdentifier;
    unsigned char _commandType;
    unsigned char _messageNumber;
    Address _destinationAddress;
    unsigned char _commandDataLength;
    string _commandData;

    // initialize members to sensible values
    void init();
    
  public:
    // constructor, sets sensible default values
    SMSCommandMessage() {init();}

    // constructor with given pdu
    SMSCommandMessage(string pdu) throw(GsmException);

    // encode pdu, return hexadecimal pdu string
    virtual string encode();

    // create textual representation of SMS
    virtual string toString() const;

    // inherited from SMSMessage
    Address address() const;
    Ref<SMSMessage> clone();

    // accessor functions
    unsigned char messageReference() const {return _messageReference;}
    bool statusReportRequest() const {return _statusReportRequest;}
    unsigned char protocolIdentifier() const {return _protocolIdentifier;}
    unsigned char commandType() const {return _commandType;}
    unsigned char messageNumber() const {return _messageNumber;}
    Address destinationAddress() const {return _destinationAddress;}
    unsigned char commandDataLength() const {return _commandDataLength;}
    string commandData() const {return _commandData;}

    void setMessageReference(unsigned char x) {_messageReference = x;}
    void setStatusReportRequest(bool x) {_statusReportRequest = x;}
    void setProtocolIdentifier(unsigned char x) {_protocolIdentifier = x;}
    void setCommandType(unsigned char x) {_commandType = x;}
    void setMessageNumber(unsigned char x) {_messageNumber = x;}
    void setDestinationAddress(Address &x) {_destinationAddress = x;}
    void setCommandDataLength(unsigned char x) {_commandDataLength = x;}
    void setCommandData(string x) {_commandData = x;}

    virtual ~SMSCommandMessage() {}
  };

  // SMS-DELIVER-REPORT TPDU for RP-ACK
  class SMSDeliverReportMessage : public SMSMessage
  {
  private:
    // SMS-DELIVER-REPORT PDU (see GSM 03.40 section 9.2.2.1a (II))
    bool _protocolIdentifierPresent; // parameter indicator
    bool _dataCodingSchemePresent;
    bool _userDataLengthPresent;
    unsigned char _protocolIdentifier;
    
    // initialize members to sensible values
    void init();
    
  public:
    // constructor, sets sensible default values
    SMSDeliverReportMessage() {init();}

    // constructor with given pdu
    SMSDeliverReportMessage(string pdu) throw(GsmException);

    // encode pdu, return hexadecimal pdu string
    virtual string encode();

    // create textual representation of SMS
    virtual string toString() const;

    // inherited from SMSMessage
    Address address() const;
    Ref<SMSMessage> clone();

    // accessor functions
    bool protocolIdentifierPresent() const {return _protocolIdentifierPresent;}
    bool dataCodingSchemePresent() const {return _dataCodingSchemePresent;}
    bool userDataLengthPresent() const {return _userDataLengthPresent;}
    unsigned char protocolIdentifier() const
      {assert(_protocolIdentifierPresent); return _protocolIdentifier;}
    DataCodingScheme dataCodingScheme() const
      {assert(_dataCodingSchemePresent); return _dataCodingScheme;}
    UserDataHeader userDataHeader() const
      {assert(_userDataLengthPresent); return _userDataHeader;}
    string userData() const
      {assert(_userDataLengthPresent); return _userData;}
    
    void setProtocolIdentifier(unsigned char x)
      {_protocolIdentifierPresent = true; _protocolIdentifier = x;}
    void setDataCodingScheme(DataCodingScheme x)
      {_dataCodingSchemePresent = true; _dataCodingScheme = x;}
    void setUserDataHeader(UserDataHeader x)
    {
      _userDataLengthPresent = true;
      _userDataHeader = x;
    }
    void setUserData(string x)
    {
      _userDataLengthPresent = true;
      _userData = x;
    }
    
    virtual ~SMSDeliverReportMessage() {}
  };

  // SMS-SUBMIT-REPORT TPDU for RP-ACK
  class SMSSubmitReportMessage : public SMSMessage
  {
  private:
    // SMS-SUBMIT-REPORT PDU (see GSM 03.40 section 9.2.2.2a (II))
    Timestamp _serviceCentreTimestamp;
    bool _protocolIdentifierPresent; // parameter indicator
    bool _dataCodingSchemePresent;
    bool _userDataLengthPresent;
    unsigned char _protocolIdentifier;
    DataCodingScheme _dataCodingScheme;

    // initialize members to sensible values
    void init();
    
  public:
    // constructor, sets sensible default values
    SMSSubmitReportMessage() {init();}

    // constructor with given pdu
    SMSSubmitReportMessage(string pdu) throw(GsmException);

    // encode pdu, return hexadecimal pdu string
    virtual string encode();

    // create textual representation of SMS
    virtual string toString() const;

    // inherited from SMSMessage
    Address address() const;
    Ref<SMSMessage> clone();

    // accessor functions
    Timestamp serviceCentreTimestamp() const {return _serviceCentreTimestamp;}
    bool protocolIdentifierPresent() const {return _protocolIdentifierPresent;}
    bool dataCodingSchemePresent() const {return _dataCodingSchemePresent;}
    bool userDataLengthPresent() const {return _userDataLengthPresent;}
    unsigned char protocolIdentifier() const
      {assert(_protocolIdentifierPresent); return _protocolIdentifier;}
    DataCodingScheme dataCodingScheme() const
      {assert(_dataCodingSchemePresent); return _dataCodingScheme;}
    UserDataHeader userDataHeader() const
      {assert(_userDataLengthPresent); return _userDataHeader;}
    string userData() const
      {assert(_userDataLengthPresent); return _userData;}

    void setServiceCentreTimestamp(Timestamp &x) {_serviceCentreTimestamp = x;}
    void setProtocolIdentifier(unsigned char x)
      {_protocolIdentifierPresent = true; _protocolIdentifier = x;}
    void setDataCodingScheme(DataCodingScheme x)
      {_dataCodingSchemePresent = true; _dataCodingScheme = x;}
    void setUserDataHeader(UserDataHeader x)
    {
      _userDataLengthPresent = true;
      _userDataHeader = x;
    }
    void setUserData(string x)
    {
      _userDataLengthPresent = true;
      _userData = x;
    }
    virtual ~SMSSubmitReportMessage() {}
  };

  // some useful typdefs
  typedef Ref<SMSMessage> SMSMessageRef;
};

#endif // GSM_SMS_H