skarg
252 lines
8.2 KiB
C
252 lines
8.2 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2007 Steve Karg <skarg@users.sourceforge.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*********************************************************************/
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include "config.h"
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#include "txbuf.h"
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#include "bacdef.h"
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#include "bacdcode.h"
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#include "apdu.h"
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#include "npdu.h"
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#include "abort.h"
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#include "cov.h"
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/* demo objects */
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#include "device.h"
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#include "ai.h"
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#include "ao.h"
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#include "av.h"
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#include "bi.h"
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#include "bo.h"
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#include "bv.h"
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#include "lc.h"
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#include "lsp.h"
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#include "mso.h"
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#if defined(BACFILE)
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#include "bacfile.h"
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#endif
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/* note: This COV service only monitors the properties
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of an object that have been specified in the standard. */
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typedef struct BACnet_COV_Subscription {
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bool valid;
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uint32_t subscriberProcessIdentifier;
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BACNET_OBJECT_ID monitoredObjectIdentifier;
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bool issueConfirmedNotifications; /* optional */
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uint32_t lifetime; /* optional */
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} BACNET_COV_SUBSCRIPTION;
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#define MAX_COV_SUBCRIPTIONS 32
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static BACNET_COV_SUBSCRIPTION COV_Subscriptions[MAX_COV_SUBCRIPTIONS];
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void handler_cov_init(
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void)
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{
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unsigned index = 0;
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for (index = 0; index < MAX_COV_SUBCRIPTIONS; index++) {
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COV_Subscriptions[index].valid = false;
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COV_Subscriptions[index].subscriberProcessIdentifier = 0;
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COV_Subscriptions[index].monitoredObjectIdentifier.type =
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OBJECT_ANALOG_INPUT;
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COV_Subscriptions[index].monitoredObjectIdentifier.instance = 0;
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COV_Subscriptions[index].issueConfirmedNotifications = false;
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COV_Subscriptions[index].lifetime = 0;
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}
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}
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static bool cov_list_subscribe(
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BACNET_ADDRESS * src,
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BACNET_SUBSCRIBE_COV_DATA *cov_data)
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{
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bool existing_entry = false;
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int index;
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int first_invalid_index = -1;
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bool found = true;
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/* existing? - match Object ID and Process ID */
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for (index = 0; index < MAX_COV_SUBCRIPTIONS; index++) {
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if ((COV_Subscriptions[index].valid) &&
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(COV_Subscriptions[index].monitoredObjectIdentifier.type ==
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cov_data->monitoredObjectIdentifier.type) &&
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(COV_Subscriptions[index].monitoredObjectIdentifier.instance ==
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cov_data->monitoredObjectIdentifier.instance) &&
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(COV_Subscriptions[index].subscriberProcessIdentifier ==
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cov_data->subscriberProcessIdentifier)) {
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existing_entry = true;
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if (cov_data->cancellationRequest) {
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COV_Subscriptions[index].valid = false;
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} else {
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COV_Subscriptions[index].issueConfirmedNotifications =
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cov_data->issueConfirmedNotifications;
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COV_Subscriptions[index].lifetime =
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cov_data->lifetime;
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}
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/* FIXME: update SRC address */
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break;
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} else {
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if (first_invalid_index < 0) {
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first_invalid_index = index;
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}
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}
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}
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if (!existing_entry && (first_invalid_index >= 0) &&
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(!cov_data->cancellationRequest)) {
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index = first_invalid_index;
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found = true;
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if (!cov_data->cancellationRequest) {
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COV_Subscriptions[index].valid = true;
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}
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COV_Subscriptions[index].monitoredObjectIdentifier.type =
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cov_data->monitoredObjectIdentifier.type;
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COV_Subscriptions[index].monitoredObjectIdentifier.instance =
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cov_data->monitoredObjectIdentifier.instance;
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COV_Subscriptions[index].subscriberProcessIdentifier =
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cov_data->subscriberProcessIdentifier;
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COV_Subscriptions[index].issueConfirmedNotifications =
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cov_data->issueConfirmedNotifications;
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COV_Subscriptions[index].lifetime =
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cov_data->lifetime;
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/* FIXME: add SRC address */
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} else {
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found = false;
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}
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return found;
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}
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/* note: worst case tasking: MS/TP with the ability to send only
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one notification per task cycle */
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void handler_cov_task(
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uint32_t elapsed_milliseconds)
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{
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/* handle timeouts */
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/* handle COV notifications */
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}
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static bool cov_subscribe(
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BACNET_ADDRESS * src,
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BACNET_SUBSCRIBE_COV_DATA * cov_data,
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BACNET_ERROR_CLASS * error_class,
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BACNET_ERROR_CODE * error_code)
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{
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bool status = false; /* return value */
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switch (cov_data->monitoredObjectIdentifier.type) {
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case OBJECT_BINARY_INPUT:
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status = true;
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status = cov_list_subscribe(src,cov_data);
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break;
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default:
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/* FIXME: what is the ERROR? */
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break;
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}
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return status;
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}
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void handler_cov_subscribe(
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uint8_t * service_request,
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uint16_t service_len,
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BACNET_ADDRESS * src,
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BACNET_CONFIRMED_SERVICE_DATA * service_data)
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{
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BACNET_SUBSCRIBE_COV_DATA cov_data;
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int len = 0;
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int pdu_len = 0;
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BACNET_NPDU_DATA npdu_data;
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bool success = false;
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int bytes_sent = 0;
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BACNET_ERROR_CLASS error_class = ERROR_CLASS_OBJECT;
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BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;
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BACNET_ADDRESS my_address;
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/* encode the NPDU portion of the packet */
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datalink_get_my_address(&my_address);
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npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
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pdu_len =
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npdu_encode_pdu(&Handler_Transmit_Buffer[0], src, &my_address,
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&npdu_data);
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if (service_data->segmented_message) {
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/* we don't support segmentation - send an abort */
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len =
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abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, ABORT_REASON_SEGMENTATION_NOT_SUPPORTED,
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true);
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#if PRINT_ENABLED
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fprintf(stderr, "SubscribeCOV: Segmented message. Sending Abort!\n");
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#endif
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goto COV_ABORT;
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}
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len =
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cov_subscribe_decode_service_request(service_request, service_len,
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&cov_data);
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#if PRINT_ENABLED
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if (len <= 0)
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fprintf(stderr, "SubscribeCOV: Unable to decode Request!\n");
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#endif
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if (len < 0) {
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/* bad decoding - send an abort */
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len =
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abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, ABORT_REASON_OTHER, true);
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#if PRINT_ENABLED
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fprintf(stderr, "SubscribeCOV: Bad decoding. Sending Abort!\n");
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#endif
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goto COV_ABORT;
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}
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success = cov_subscribe(src, &cov_data, &error_class, &error_code);
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if (success) {
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len =
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encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, SERVICE_CONFIRMED_SUBSCRIBE_COV);
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#if PRINT_ENABLED
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fprintf(stderr, "SubscribeCOV: Sending Simple Ack!\n");
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#endif
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} else {
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len =
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bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, SERVICE_CONFIRMED_SUBSCRIBE_COV,
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error_class, error_code);
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#if PRINT_ENABLED
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fprintf(stderr, "SubscribeCOV: Sending Error!\n");
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#endif
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}
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COV_ABORT:
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pdu_len += len;
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bytes_sent =
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datalink_send_pdu(src, &npdu_data, &Handler_Transmit_Buffer[0],
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pdu_len);
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#if PRINT_ENABLED
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if (bytes_sent <= 0)
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fprintf(stderr, "SubscribeCOV: Failed to send PDU (%s)!\n",
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strerror(errno));
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#endif
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return;
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}
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