skarg
cc7e9b539d
Get event handler checks only if APDU length is less than Max APDU of device that has requested list of events, but it does not check its own Max APDU to see if response is too long to fit in Handler_Transmit_Buffer. Thanks, Daniel Blazevic!
246 lines
8.6 KiB
C
246 lines
8.6 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2009 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 "bacerror.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 "event.h"
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#include "getevent.h"
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#include "handlers.h"
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/** @file h_getevent.c Handles Get Event Information request. */
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static get_event_info_function Get_Event_Info[MAX_BACNET_OBJECT_TYPE];
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/** print eventState
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*/
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void ge_ack_print_data(
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BACNET_GET_EVENT_INFORMATION_DATA * data,
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uint32_t device_id)
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{
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BACNET_GET_EVENT_INFORMATION_DATA *act_data = data;
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const char* state_strs[] = {"NO", "FA", "ON", "HL", "LL"};
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printf("DeviceID\tType\tInstance\teventState\n");
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printf("--------------- ------- --------------- ---------------\n");
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int count = 0;
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while (act_data) {
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printf("%u\t\t%u\t%u\t\t%s\n",
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device_id,
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act_data->objectIdentifier.type,
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act_data->objectIdentifier.instance,
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state_strs[data->eventState]
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);
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act_data = act_data->next;
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count++;
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}
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printf("\n%u\t Total\n",count);
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}
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void handler_get_event_information_set(
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BACNET_OBJECT_TYPE object_type,
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get_event_info_function pFunction)
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{
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if (object_type < MAX_BACNET_OBJECT_TYPE) {
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Get_Event_Info[object_type] = pFunction;
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}
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}
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void handler_get_event_information(
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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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int len = 0;
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int pdu_len = 0;
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int apdu_len = 0;
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BACNET_NPDU_DATA npdu_data;
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bool error = false;
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bool more_events = 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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BACNET_OBJECT_ID object_id;
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unsigned i = 0, j = 0; /* counter */
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BACNET_GET_EVENT_INFORMATION_DATA getevent_data;
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int valid_event = 0;
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/* initialize type of 'Last Received Object Identifier' using max value */
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object_id.type = MAX_BACNET_OBJECT_TYPE;
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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,
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"GetEventInformation: " "Segmented message. Sending Abort!\n");
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#endif
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goto GET_EVENT_ABORT;
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}
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len =
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getevent_decode_service_request(service_request, service_len,
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&object_id);
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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,
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"GetEventInformation: Bad Encoding. Sending Abort!\n");
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#endif
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goto GET_EVENT_ABORT;
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}
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len =
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getevent_ack_encode_apdu_init(&Handler_Transmit_Buffer[pdu_len],
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sizeof(Handler_Transmit_Buffer) - pdu_len, service_data->invoke_id);
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if (len <= 0) {
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error = true;
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goto GET_EVENT_ERROR;
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}
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pdu_len += len;
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apdu_len = len;
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for (i = 0; i < MAX_BACNET_OBJECT_TYPE; i++) {
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if (Get_Event_Info[i]) {
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for (j = 0; j < 0xffff; j++) {
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valid_event = Get_Event_Info[i] (j, &getevent_data);
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if (valid_event > 0) {
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/* encode GetEvent_data only when type of object_id has max value */
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if (object_id.type != MAX_BACNET_OBJECT_TYPE) {
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if ((object_id.type ==
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getevent_data.objectIdentifier.type) &&
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(object_id.instance ==
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getevent_data.objectIdentifier.instance)) {
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/* found 'Last Received Object Identifier'
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so should set type of object_id to max value */
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object_id.type = MAX_BACNET_OBJECT_TYPE;
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}
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continue;
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}
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getevent_data.next = NULL;
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len =
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getevent_ack_encode_apdu_data(&Handler_Transmit_Buffer
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[pdu_len], sizeof(Handler_Transmit_Buffer) - pdu_len,
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&getevent_data);
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if (len <= 0) {
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error = true;
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goto GET_EVENT_ERROR;
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}
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apdu_len += len;
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if ((apdu_len >= service_data->max_resp - 2) ||
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(apdu_len >= MAX_APDU - 2)) {
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/* Device must be able to fit minimum
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one event information.
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Length of one event informations needs
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more than 50 octets. */
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if ((service_data->max_resp < 128) ||
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(MAX_APDU < 128)) {
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len = BACNET_STATUS_ABORT;
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error = true;
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goto GET_EVENT_ERROR;
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} else {
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more_events = true;
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}
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break;
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} else {
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pdu_len += len;
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}
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} else if (valid_event < 0) {
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break;
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}
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}
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}
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}
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len =
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getevent_ack_encode_apdu_end(&Handler_Transmit_Buffer[pdu_len],
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sizeof(Handler_Transmit_Buffer) - pdu_len, more_events);
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if (len <= 0) {
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error = true;
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goto GET_EVENT_ERROR;
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}
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#if PRINT_ENABLED
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fprintf(stderr, "Got a GetEventInformation request: Sending Ack!\n");
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#endif
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GET_EVENT_ERROR:
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if (error) {
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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 (len == -2) {
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/* BACnet APDU too small to fit data, so proper response is 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,
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ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
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#if PRINT_ENABLED
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fprintf(stderr,
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"GetEventInformation: " "Reply too big to fit into APDU!\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_READ_PROPERTY,
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error_class, error_code);
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#if PRINT_ENABLED
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fprintf(stderr, "GetEventInformation: Sending Error!\n");
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#endif
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}
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}
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GET_EVENT_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, "Failed to send PDU (%s)!\n", strerror(errno));
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#endif
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return;
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}
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