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

/**************************************************************************
*
* Copyright (C) 2007 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 "cov.h"
/* demo objects */
#include "device.h"
#include "ai.h"
#include "ao.h"
#include "av.h"
#include "bi.h"
#include "bo.h"
#include "bv.h"
#include "lc.h"
#include "lsp.h"
#include "mso.h"
#if defined(BACFILE)
    #include "bacfile.h"
#endif

typedef struct BACnet_COV_Subscription {
    bool valid;
    uint32_t subscriberProcessIdentifier;
    BACNET_OBJECT_ID monitoredObjectIdentifier;
    bool issueConfirmedNotifications;   /* optional */
    unsigned lifetime;          /* optional */
    BACNET_PROPERTY_REFERENCE monitoredProperty;
    bool covIncrementPresent;   /* true if present */
    float covIncrement;         /* optional */
} BACNET_COV_SUBSCRIPTION;

#define MAX_COV_SUBCRIPTIONS 32
static BACNET_COV_SUBSCRIPTION COV_Subscriptions[MAX_COV_SUBCRIPTIONS];

void handler_cov_init(void)
{
    unsigned index = 0;

    for (index = 0; index < MAX_COV_SUBCRIPTIONS; index++) {
        COV_Subscriptions[index].valid = false;
        COV_Subscriptions[index].subscriberProcessIdentifier = 0;
        COV_Subscriptions[index].monitoredObjectIdentifier.type = OBJECT_ANALOG_INPUT;
        COV_Subscriptions[index].monitoredObjectIdentifier.instance = 0;
        COV_Subscriptions[index].issueConfirmedNotifications = false;
        COV_Subscriptions[index].lifetime = 0;
        COV_Subscriptions[index].monitoredProperty.propertyIdentifier = PROP_ALL;
        COV_Subscriptions[index].monitoredProperty.propertyArrayIndex = -1;
        COV_Subscriptions[index].covIncrementPresent = false;
        COV_Subscriptions[index].covIncrement = 0;
    }
}

void handler_cov_task(void)
{
    /* handle timeouts */
    /* handle COV notifications */
}

static bool cov_subscribe(
    BACNET_SUBSCRIBE_COV_DATA *cov_data,
    BACNET_ERROR_CLASS * error_class,
    BACNET_ERROR_CODE * error_code)
{
    bool status = false; /* return value */

    switch (cov_data->monitoredObjectIdentifier.type) {
        case OBJECT_BINARY_INPUT:
            status = true;
            break;
        default:
            break;
    }

    return status;
}

void handler_cov_subscribe(uint8_t * service_request,
    uint16_t service_len,
    BACNET_ADDRESS * src, BACNET_CONFIRMED_SERVICE_DATA * service_data)
{
    BACNET_SUBSCRIBE_COV_DATA cov_data;
    int len = 0;
    int pdu_len = 0;
    BACNET_NPDU_DATA npdu_data;
    bool success = false;
    int bytes_sent = 0;
    BACNET_ERROR_CLASS error_class = ERROR_CLASS_OBJECT;
    BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;
    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, "SubscribeCOV: Segmented message.  Sending Abort!\n");
#endif
        goto COV_ABORT;
    }
    len = cov_subscribe_decode_service_request(service_request,
        service_len, &cov_data);
#if PRINT_ENABLED
    if (len <= 0)
        fprintf(stderr, "SubscribeCOV: 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, "SubscribeCOV: Bad decoding.  Sending Abort!\n");
#endif
        goto COV_ABORT;
    }
    success = cov_subscribe(&cov_data, &error_class, &error_code);
    if (success) {
        len = encode_simple_ack(
            &Handler_Transmit_Buffer[pdu_len],
            service_data->invoke_id,
            SERVICE_CONFIRMED_SUBSCRIBE_COV);
#if PRINT_ENABLED
        fprintf(stderr,
            "SubscribeCOV: Sending Simple Ack!\n");
#endif
    } else {
        len = bacerror_encode_apdu(
            &Handler_Transmit_Buffer[pdu_len],
            service_data->invoke_id,
            SERVICE_CONFIRMED_SUBSCRIBE_COV,
            error_class,
            error_code);
#if PRINT_ENABLED
        fprintf(stderr,
            "SubscribeCOV: Sending Error!\n");
#endif
    }
COV_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, "SubscribeCOV: Failed to send PDU (%s)!\n", strerror(errno));
#endif

    return;
}