skarg
249 lines
8.1 KiB
C
249 lines
8.1 KiB
C
/*####COPYRIGHTBEGIN####
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-------------------------------------------
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Copyright (C) 2006 Steve Karg
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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The Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA.
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As a special exception, if other files instantiate templates or
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use macros or inline functions from this file, or you compile
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this file and link it with other works to produce a work based
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on this file, this file does not by itself cause the resulting
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work to be covered by the GNU General Public License. However
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the source code for this file must still be made available in
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accordance with section (3) of the GNU General Public License.
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This exception does not invalidate any other reasons why a work
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based on this file might be covered by the GNU General Public
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License.
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-------------------------------------------
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####COPYRIGHTEND####*/
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#include <stdint.h>
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#include "bacenum.h"
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#include "bacdcode.h"
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#include "bacdef.h"
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#include "whohas.h"
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/* encode service - use -1 for limit for unlimited */
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int whohas_encode_apdu(uint8_t * apdu, BACNET_WHO_HAS_DATA * data)
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{
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int len = 0; // length of each encoding
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int apdu_len = 0; // total length of the apdu, return value
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if (apdu && data) {
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apdu[0] = PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST;
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apdu[1] = SERVICE_UNCONFIRMED_WHO_HAS; // service choice
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apdu_len = 2;
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// optional limits - must be used as a pair
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if ((data->low_limit >= 0)
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&& (data->low_limit <= BACNET_MAX_INSTANCE)
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&& (data->high_limit >= 0)
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&& (data->high_limit <= BACNET_MAX_INSTANCE)) {
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len =
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encode_context_unsigned(&apdu[apdu_len], 0,
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data->low_limit);
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apdu_len += len;
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len = encode_context_unsigned(&apdu[apdu_len],
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1, data->high_limit);
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apdu_len += len;
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}
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if (data->object_name) {
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len = encode_context_character_string(&apdu[apdu_len],
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3, &data->object.name);
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apdu_len += len;
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} else {
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len = encode_context_object_id(&apdu[apdu_len],
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2,
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data->object.identifier.type,
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data->object.identifier.instance);
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apdu_len += len;
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}
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}
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return apdu_len;
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}
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// decode the service request only
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int whohas_decode_service_request(uint8_t * apdu,
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unsigned apdu_len, BACNET_WHO_HAS_DATA * data)
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{
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int len = 0;
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uint8_t tag_number = 0;
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uint32_t len_value = 0;
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uint32_t decoded_value = 0; /* for decoding */
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int decoded_type = 0; /* for decoding */
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if (apdu_len && data) {
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/* optional limits - must be used as a pair */
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if (decode_is_context_tag(&apdu[len], 0)) {
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len +=
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decode_tag_number_and_value(&apdu[len], &tag_number,
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&len_value);
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len += decode_unsigned(&apdu[len], len_value, &decoded_value);
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if (decoded_value <= BACNET_MAX_INSTANCE)
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data->low_limit = decoded_value;
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if (!decode_is_context_tag(&apdu[len], 1))
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return -1;
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len +=
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decode_tag_number_and_value(&apdu[len], &tag_number,
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&len_value);
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len += decode_unsigned(&apdu[len], len_value, &decoded_value);
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if (decoded_value <= BACNET_MAX_INSTANCE)
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data->high_limit = decoded_value;
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} else {
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data->low_limit = -1;
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data->high_limit = -1;
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}
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/* object id */
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if (decode_is_context_tag(&apdu[len], 2)) {
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data->object_name = false;
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len +=
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decode_tag_number_and_value(&apdu[len], &tag_number,
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&len_value);
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len +=
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decode_object_id(&apdu[len], &decoded_type,
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&data->object.identifier.instance);
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data->object.identifier.type = decoded_type;
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}
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/* object name */
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else if (decode_is_context_tag(&apdu[len], 3)) {
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data->object_name = true;
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len +=
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decode_tag_number_and_value(&apdu[len], &tag_number,
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&len_value);
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len +=
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decode_character_string(&apdu[len], len_value,
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&data->object.name);
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}
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/* missing required parameters */
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else
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return -1;
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}
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return len;
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}
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int whohas_decode_apdu(uint8_t * apdu,
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unsigned apdu_len, BACNET_WHO_HAS_DATA * data)
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{
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int len = 0;
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if (!apdu)
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return -1;
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// optional checking - most likely was already done prior to this call
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if (apdu[0] != PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST)
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return -1;
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if (apdu[1] != SERVICE_UNCONFIRMED_WHO_IS)
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return -1;
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// optional limits - must be used as a pair
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if (apdu_len > 2) {
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len = whohas_decode_service_request(&apdu[2], apdu_len - 2, data);
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}
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return len;
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}
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#ifdef TEST
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#include <assert.h>
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#include <string.h>
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#include "ctest.h"
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void testWhoHasData(Test * pTest, BACNET_WHO_HAS_DATA * data)
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{
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uint8_t apdu[480] = { 0 };
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int len = 0;
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int apdu_len = 0;
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BACNET_WHO_HAS_DATA test_data;
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len = whohas_encode_apdu(&apdu[0], data);
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ct_test(pTest, len != 0);
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apdu_len = len;
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len = whohas_decode_apdu(&apdu[0], apdu_len, &test_data);
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ct_test(pTest, len != -1);
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ct_test(pTest, test_data.low_limit == data->low_limit);
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ct_test(pTest, test_data.high_limit == data->high_limit);
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ct_test(pTest, test_data.object_name == data->object_name);
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/* Object ID */
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if (data->object_name == false) {
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ct_test(pTest, test_data.object.identifier.type ==
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data->object.identifier.type);
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ct_test(pTest, test_data.object.identifier.instance ==
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data->object.identifier.instance);
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}
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/* Object Name */
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else {
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ct_test(pTest, characterstring_same(&test_data.object.name,
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&data->object.name));
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}
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}
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void testWhoHas(Test * pTest)
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{
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BACNET_WHO_HAS_DATA data;
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data.low_limit = -1;
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data.high_limit = -1;
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data.object_name = false;
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data.object.identifier.type = OBJECT_ANALOG_INPUT;
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data.object.identifier.instance = 1;
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testWhoHasData(pTest, &data);
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for (data.low_limit = 0;
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data.low_limit <= BACNET_MAX_INSTANCE;
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data.low_limit += (BACNET_MAX_INSTANCE / 4)) {
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for (data.high_limit = 0;
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data.high_limit <= BACNET_MAX_INSTANCE;
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data.high_limit += (BACNET_MAX_INSTANCE / 4)) {
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data.object_name = false;
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for (data.object.identifier.type = OBJECT_ANALOG_INPUT;
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data.object.identifier.type <= MAX_BACNET_OBJECT_TYPE;
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data.object.identifier.type++) {
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for (data.object.identifier.instance = 1;
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data.object.identifier.instance <= BACNET_MAX_INSTANCE;
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data.object.identifier.instance <<= 1) {
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testWhoHasData(pTest, &data);
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}
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}
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data.object_name = true;
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characterstring_init_ansi(&data.object.name, "patricia");
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testWhoHasData(pTest, &data);
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}
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}
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}
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#ifdef TEST_WHOHAS
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int main(void)
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{
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Test *pTest;
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bool rc;
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pTest = ct_create("BACnet Who-Has", NULL);
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/* individual tests */
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rc = ct_addTestFunction(pTest, testWhoHas);
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assert(rc);
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ct_setStream(pTest, stdout);
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ct_run(pTest);
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(void) ct_report(pTest);
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ct_destroy(pTest);
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return 0;
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}
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#endif /* TEST_WHOIS */
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#endif /* TEST */
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