bacnetmstp.hpp

/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2016 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#pragma once

#include <string>

// we only support a BACnet RS-485 MS/TP datalink
#define BACDL_MSTP 1
#undef BACDL_ALL

// get a variety of bacnet-stack includes...
#include "bacdef.h"
#include "config.h"
#include "bactext.h"
#include "bacerror.h"
#include "iam.h"
#include "arf.h"
#include "tsm.h"
#include "address.h"
#include "npdu.h"
#include "apdu.h"
#include "device.h"
#include "datalink.h"
#include "whois.h"
#include "mstpdef.h"
#include "dlmstp.h"


namespace upm {

  class BACNETMSTP {
    // Constructor and destructor are protected

  public:

    // error types
    typedef enum {
      BACERR_TYPE_NONE                = 0,
      BACERR_TYPE_REJECT,
      BACERR_TYPE_ABORT,
      BACERR_TYPE_ERROR,
      BACERR_TYPE_UPM
    } BACERR_TYPE_T;

    // command types we currently support
    typedef enum {
      BACCMD_NONE                     = 0,
      BACCMD_READ_PROPERTY,
      BACCMD_WRITE_PROPERTY
    } BACCMD_TYPE_T;

    static BACNETMSTP* instance();

    void initMaster(std::string port, int baudRate, int deviceInstanceNumber,
                    int macAddr, int maxMaster=DEFAULT_MAX_MASTER,
                    int maxInfoFrames=1);


    bool readProperty(uint32_t targetDeviceInstanceID,
                      BACNET_OBJECT_TYPE objType,
                      uint32_t objInstance,
                      BACNET_PROPERTY_ID objProperty,
                      uint32_t arrayIndex=BACNET_ARRAY_ALL);

    bool writeProperty(uint32_t targetDeviceInstanceID,
                       BACNET_OBJECT_TYPE objType,
                       uint32_t objInstance,
                       BACNET_PROPERTY_ID objProperty,
                       BACNET_APPLICATION_DATA_VALUE* propValue,
                       uint8_t propPriority=BACNET_NO_PRIORITY,
                       int32_t arrayIndex=BACNET_ARRAY_ALL);

    BACNET_APPLICATION_DATA_VALUE getData();

    uint8_t getDataType();

    float getDataTypeReal();

    bool getDataTypeBoolean();

    unsigned int getDataTypeUnsignedInt();

    int getDataTypeSignedInt();

    std::string getDataTypeString();

    unsigned int getDataTypeEnum();

#if defined(BACAPP_DOUBLE)

    double getDataTypeDouble();
#endif // BACAPP_DOUBLE

    BACNET_APPLICATION_DATA_VALUE createDataReal(float Real);

    BACNET_APPLICATION_DATA_VALUE createDataBool(bool value);

    BACNET_APPLICATION_DATA_VALUE createDataSignedInt(int value);

    BACNET_APPLICATION_DATA_VALUE createDataUnsignedInt(unsigned int value);

    BACNET_APPLICATION_DATA_VALUE createDataString(std::string value);

    BACERR_TYPE_T getErrorType()
    {
      return m_errorType;
    };

    uint8_t getRejectReason()
    {
      return m_rejectReason;
    };

    std::string getRejectString()
    {
      return m_rejectString;
    };

    uint8_t getAbortReason()
    {
      return m_abortReason;
    };

    std::string getAbortString()
    {
      return m_abortString;
    };

    BACNET_ERROR_CLASS getErrorClass()
    {
      return m_errorClass;
    };

    BACNET_ERROR_CODE getErrorCode()
    {
      return m_errorCode;
    };

    std::string getErrorString()
    {
      return m_errorString;
    };

    std::string getUPMErrorString()
    {
      return m_upmErrorString;
    };

    bool isInitialized()
    {
      return m_initialized;
    };

    std::string getPort()
    {
      return m_port;
    };

    uint32_t getDeviceInstanceID()
    {
      return m_deviceInstanceID;
    };

    int getMaxInfoFrames()
    {
      return m_maxInfoFrames;
    };

    int getMaxMaster()
    {
      return m_maxMaster;
    };

    int getBaudRate()
    {
      return m_baudRate;
    };

    int getMACAddress()
    {
      return m_macAddr;
    };

    void setDebug(bool enable);

  protected:
    BACNETMSTP();

    ~BACNETMSTP();

    // clear/reset error states
    void clearErrors();

    // error handler
    static void handlerError(BACNET_ADDRESS * src,
                             uint8_t invoke_id,
                             BACNET_ERROR_CLASS error_class,
                             BACNET_ERROR_CODE error_code);

    // abort handler
    static void handlerAbort(BACNET_ADDRESS * src,
                             uint8_t invoke_id,
                             uint8_t abort_reason,
                             bool server);

    // reject handler
    static void handlerReject(BACNET_ADDRESS * src,
                              uint8_t invoke_id,
                              uint8_t reject_reason);


    // our handler for dealing with return data from a ReadProperty call
    static void handlerReadPropertyAck(uint8_t* service_request,
                                       uint16_t service_len,
                                       BACNET_ADDRESS* src,
                                       BACNET_CONFIRMED_SERVICE_ACK_DATA* service_data);

    // our handler for writeProp acks
    static void handlerWritePropertyAck(BACNET_ADDRESS* src,
                                        uint8_t invoke_id);

    // initialize our service handlers
    void initServiceHandlers();

    // utility function
    std::string string2HexString(std::string input);

    // responsible for dispatching a request to the BACnet network
    bool dispatchRequest();

  private:
    // prevent copying and assignment
    BACNETMSTP(BACNETMSTP const &) {};
    BACNETMSTP& operator=(BACNETMSTP const&) {};

    // our class instance
    static BACNETMSTP* m_instance;

    // has the class been created yet?
    bool m_initialized;

    // Some items we can set for our master
    std::string m_port;
    int m_maxInfoFrames;
    int m_maxMaster;
    int m_baudRate;
    int m_macAddr;

    // the unique Instance Number of our Master Device Object
    uint32_t m_deviceInstanceID;

    // adpu timeout in milliseconds
    uint16_t m_adpuTimeoutMS;

    // buffer used for receiving data
    uint8_t m_rxBuffer[MAX_MPDU];

    // our error classfication
    BACERR_TYPE_T m_errorType;

    // BACnet reject info
    uint8_t m_rejectReason;
    std::string m_rejectString;

    // BACnet abort info
    uint8_t m_abortReason;
    std::string m_abortString;

    // BACnet error info
    BACNET_ERROR_CLASS m_errorClass;
    BACNET_ERROR_CODE  m_errorCode;
    std::string m_errorString;

    // generic UPM related errors - we just set the error text to
    // something informative.
    std::string m_upmErrorString;

    // our returned data from readProperty()
    BACNET_APPLICATION_DATA_VALUE m_returnedValue;

    // current bound target address of dispatched service request
    // (read/write prop, etc)
    BACNET_ADDRESS m_targetAddress;

    // current invokeID (for transaction handling)
    uint8_t m_invokeID;

    // error detected flag
    bool m_errorDetected;

    // Commands - we create a struct to hold the arguments for each
    // command type we support.  Then, we create a command struct
    // which contains the command type and a union containing the
    // relevant arguments.  This is used by dispatchRequest() to issue
    // the correct request.

    // these may generate SWIG warnings, but they can be ignored as we
    // do not expose these outside the class
    typedef struct {
      uint32_t targetDeviceInstanceID;
      BACNET_OBJECT_TYPE objType;
      uint32_t objInstance;
      BACNET_PROPERTY_ID objProperty;
      uint32_t arrayIndex;
    } READ_PROPERTY_ARGS_T;

    typedef struct {
      uint32_t targetDeviceInstanceID;
      BACNET_OBJECT_TYPE objType;
      uint32_t objInstance;
      BACNET_PROPERTY_ID objProperty;
      BACNET_APPLICATION_DATA_VALUE* propValue;
      uint8_t propPriority;
      int32_t arrayIndex;
    } WRITE_PROPERTY_ARGS_T;

    struct {
      BACCMD_TYPE_T cmd;

      union {
        READ_PROPERTY_ARGS_T readPropArgs;
        WRITE_PROPERTY_ARGS_T writePropArgs;
      };
    } m_command;

    bool m_debugging;
  };
}