bacnet_stack/bacnet-stack/demo/handler/h_rp.c

/**************************************************************************
*
* Copyright (C) 2005 Steve Karg <skarg@users.sourceforge.net>
*
* 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.
*
*********************************************************************/
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "config.h"
#include "txbuf.h"
#include "bacdef.h"
#include "bacdcode.h"
#include "apdu.h"
#include "npdu.h"
#include "abort.h"
#include "rp.h"
/* demo objects */
#include "device.h"
#include "ai.h"
#include "ao.h"
#if BACFILE
#include "bacfile.h"
#endif

static uint8_t Temp_Buf[MAX_APDU] = {0};

void handler_read_property(
  uint8_t *service_request,
  uint16_t service_len,
  BACNET_ADDRESS *src,
  BACNET_CONFIRMED_SERVICE_DATA *service_data)
{
  BACNET_READ_PROPERTY_DATA data;
  int len = 0;
  int pdu_len = 0;
  BACNET_ADDRESS my_address;
  bool send = false;
  bool error = false;
  int bytes_sent = 0;
  BACNET_ERROR_CLASS error_class = ERROR_CLASS_OBJECT;
  BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;

  len = rp_decode_service_request(
    service_request,
    service_len,
    &data);
  if (len <= 0)
    fprintf(stderr,"Unable to decode Read-Property Request!\n");
  // prepare a reply
  datalink_get_my_address(&my_address);
  // encode the NPDU portion of the packet
  pdu_len = npdu_encode_apdu(
    &Handler_Transmit_Buffer[0],
    src,
    &my_address,
    false,  // true for confirmed messages
    MESSAGE_PRIORITY_NORMAL);
  // bad decoding - send an abort
  if (len == -1)
  {
    pdu_len += abort_encode_apdu(
      &Handler_Transmit_Buffer[pdu_len],
      service_data->invoke_id,
      ABORT_REASON_OTHER);
    fprintf(stderr,"Sending Abort!\n");
    send = true;
  }
  else if (service_data->segmented_message)
  {
    pdu_len += abort_encode_apdu(
      &Handler_Transmit_Buffer[pdu_len],
      service_data->invoke_id,
      ABORT_REASON_SEGMENTATION_NOT_SUPPORTED);
    fprintf(stderr,"Sending Abort!\n");
    send = true;
  }
  else
  {
    switch (data.object_type)
    {
      case OBJECT_DEVICE:
        // FIXME: probably need a length limitation sent with encode
        if (data.object_instance == Device_Object_Instance_Number())
        {
          len = Device_Encode_Property_APDU(
            &Temp_Buf[0],
            data.object_property,
            data.array_index,
            &error_class,
            &error_code);
          if (len > 0)
          {
            // encode the APDU portion of the packet
            data.application_data = &Temp_Buf[0];
            data.application_data_len = len;
            // FIXME: probably need a length limitation sent with encode
            pdu_len += rp_ack_encode_apdu(
              &Handler_Transmit_Buffer[pdu_len],
              service_data->invoke_id,
              &data);
            fprintf(stderr,"Sending Read Property Ack!\n");
            send = true;
          }
          else
            error = true;
        }
        else
          error = true;
        break;
      case OBJECT_ANALOG_INPUT:
        if (Analog_Input_Valid_Instance(data.object_instance))
        {
          len = Analog_Input_Encode_Property_APDU(
            &Temp_Buf[0],
            data.object_instance,
            data.object_property,
            data.array_index,
            &error_class,
            &error_code);
          if (len > 0)
          {
            // encode the APDU portion of the packet
            data.application_data = &Temp_Buf[0];
            data.application_data_len = len;
            // FIXME: probably need a length limitation sent with encode
            pdu_len += rp_ack_encode_apdu(
              &Handler_Transmit_Buffer[pdu_len],
              service_data->invoke_id,
              &data);
            fprintf(stderr,"Sending Read Property Ack!\n");
            send = true;
          }
          else
            error = true;
        }
        else
          error = true;
        break;
      case OBJECT_ANALOG_OUTPUT:
        if (Analog_Output_Valid_Instance(data.object_instance))
        {
          len = Analog_Output_Encode_Property_APDU(
            &Temp_Buf[0],
            data.object_instance,
            data.object_property,
            data.array_index,
            &error_class,
            &error_code);
          if (len > 0)
          {
            // encode the APDU portion of the packet
            data.application_data = &Temp_Buf[0];
            data.application_data_len = len;
            // FIXME: probably need a length limitation sent with encode
            pdu_len += rp_ack_encode_apdu(
              &Handler_Transmit_Buffer[pdu_len],
              service_data->invoke_id,
              &data);
            fprintf(stderr,"Sending Read Property Ack!\n");
            send = true;
          }
          else
            error = true;
        }
        else
          error = true;
        break;
      #if BACFILE
      case OBJECT_FILE:
        if (bacfile_valid_instance(data.object_instance))
        {
          len = bacfile_encode_property_apdu(
            &Temp_Buf[0],
            data.object_instance,
            data.object_property,
            data.array_index,
            &error_class,
            &error_code);
          if (len > 0)
          {
            // encode the APDU portion of the packet
            data.application_data = &Temp_Buf[0];
            data.application_data_len = len;
            // FIXME: probably need a length limitation sent with encode
            pdu_len += rp_ack_encode_apdu(
              &Handler_Transmit_Buffer[pdu_len],
              service_data->invoke_id,
              &data);
            fprintf(stderr,"Sending Read Property Ack!\n");
            send = true;
          }
          else
            error = true;
        }
        else
          error = true;
        break;
      #endif
      default:
        error = true;
        break;
    }
  }
  if (error)
  {
    pdu_len += bacerror_encode_apdu(
      &Handler_Transmit_Buffer[pdu_len],
      service_data->invoke_id,
      SERVICE_CONFIRMED_READ_PROPERTY,
      error_class,
      error_code);
    fprintf(stderr,"Sending Read Property Error!\n");
    send = true;
  }
  if (send)
  {
    bytes_sent = datalink_send_pdu(
      src,  // destination address
      &Handler_Transmit_Buffer[0],
      pdu_len); // number of bytes of data
    if (bytes_sent <= 0)
      fprintf(stderr,"Failed to send PDU (%s)!\n", strerror(errno));
  }

  return;
}