bacnet-stack/demo/handler/h_lso.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 "lso.h"
#include "handlers.h"
#include "device.h"

/** @file h_lso.c  Handles BACnet Life Safey Operation messages. */

void handler_lso(
    uint8_t * service_request,
    uint16_t service_len,
    BACNET_ADDRESS * src,
    BACNET_CONFIRMED_SERVICE_DATA * service_data)
{
    BACNET_LSO_DATA data;
    int len = 0;
    int pdu_len = 0;
    BACNET_NPDU_DATA npdu_data;
    int bytes_sent = 0;
    BACNET_ADDRESS my_address;

    /* encode the NPDU portion of the packet */
    datalink_get_my_address(&my_address);
    npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
    pdu_len =
        npdu_encode_pdu(&Handler_Transmit_Buffer[0], src, &my_address,
        &npdu_data);
    if (service_data->segmented_message) {
        /* we don't support segmentation - send an abort */
        len =
            abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
            service_data->invoke_id, ABORT_REASON_SEGMENTATION_NOT_SUPPORTED,
            true);
#if PRINT_ENABLED
        fprintf(stderr, "LSO: Segmented message.  Sending Abort!\n");
#endif
        goto LSO_ABORT;
    }

    len = lso_decode_service_request(service_request, service_len, &data);
#if PRINT_ENABLED
    if (len <= 0)
        fprintf(stderr, "LSO: Unable to decode Request!\n");
#endif
    if (len < 0) {
        /* bad decoding - send an abort */
        len =
            abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
            service_data->invoke_id, ABORT_REASON_OTHER, true);
#if PRINT_ENABLED
        fprintf(stderr, "LSO: Bad Encoding.  Sending Abort!\n");
#endif
        goto LSO_ABORT;
    }

    /*
     ** Process Life Safety Operation Here
     */
#if PRINT_ENABLED
    fprintf(stderr,
        "Life Safety Operation: Received operation %d from process id %lu for object %lu\n",
        data.operation, (unsigned long) data.processId,
        (unsigned long) data.targetObject.instance);
#endif

    len =
        encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
        service_data->invoke_id, SERVICE_CONFIRMED_LIFE_SAFETY_OPERATION);
#if PRINT_ENABLED
    fprintf(stderr, "Life Safety Operation: " "Sending Simple Ack!\n");
#endif

  LSO_ABORT:
    pdu_len += len;
    bytes_sent =
        datalink_send_pdu(src, &npdu_data, &Handler_Transmit_Buffer[0],
        pdu_len);
#if PRINT_ENABLED
    if (bytes_sent <= 0)
        fprintf(stderr, "Life Safety Operation: " "Failed to send PDU (%s)!\n",
            strerror(errno));
#endif

    return;
}