bacnet_stack/bacnet-stack/demo/handler/h_arf.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 "arf.h"
/* demo objects */
#include "device.h"
#include "ai.h"
#include "ao.h"
#include "bacfile.h"

void handler_atomic_read_file(
  uint8_t *service_request,
  uint16_t service_len,
  BACNET_ADDRESS *src,
  BACNET_CONFIRMED_SERVICE_DATA *service_data)
{
  BACNET_ATOMIC_READ_FILE_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;

  fprintf(stderr,"Received Atomic-Read-File Request!\n");
  len = arf_decode_service_request(
    service_request,
    service_len,
    &data);
  if (len < 0)
    fprintf(stderr,"Unable to decode Atomic-Read-File 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 < 0)
  {
    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
  {
    if (data.access == FILE_STREAM_ACCESS)
    {
      if (data.type.stream.requestedOctetCount <
          octetstring_capacity(&data.fileData))
      {
        if (bacfile_read_data(&data))
        {
          pdu_len += arf_ack_encode_apdu(
            &Handler_Transmit_Buffer[pdu_len],
            service_data->invoke_id,
            &data);
          send = true;
        }
        else
        {
          send = true;
          error = true;
        }
      }
      else
      {
        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
    {
      error_class = ERROR_CLASS_SERVICES;
      error_code = ERROR_CODE_INVALID_FILE_ACCESS_METHOD;
      send = true;
      error = true;
    }
  }
  if (error)
  {
    pdu_len += bacerror_encode_apdu(
      &Handler_Transmit_Buffer[pdu_len],
      service_data->invoke_id,
      SERVICE_CONFIRMED_ATOMIC_READ_FILE,
      error_class,
      error_code);
    fprintf(stderr,"Sending 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;
}