skarg
260 lines
8.0 KiB
C
260 lines
8.0 KiB
C
/*####COPYRIGHTBEGIN####
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-------------------------------------------
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Copyright (C) 2005 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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/* encode service */
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int bacerror_encode_apdu(uint8_t * apdu,
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uint8_t invoke_id,
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BACNET_CONFIRMED_SERVICE service,
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BACNET_ERROR_CLASS error_class, BACNET_ERROR_CODE error_code)
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{
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int apdu_len = 0; /* total length of the apdu, return value */
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if (apdu) {
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apdu[0] = PDU_TYPE_ERROR;
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apdu[1] = invoke_id;
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apdu[2] = service;
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apdu_len = 3;
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/* service parameters */
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apdu_len += encode_tagged_enumerated(&apdu[apdu_len], error_class);
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apdu_len += encode_tagged_enumerated(&apdu[apdu_len], error_code);
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}
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return apdu_len;
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}
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/* decode the application class and code */
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int bacerror_decode_error_class_and_code(uint8_t * apdu,
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unsigned apdu_len,
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BACNET_ERROR_CLASS * error_class, BACNET_ERROR_CODE * error_code)
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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_type = 0;
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int decoded_value = 0;
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if (apdu_len) {
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/* error class */
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len += decode_tag_number_and_value(&apdu[len],
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&tag_number, &len_value_type);
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if (tag_number != BACNET_APPLICATION_TAG_ENUMERATED)
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return 0;
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len +=
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decode_enumerated(&apdu[len], len_value_type, &decoded_value);
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if (error_class)
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*error_class = decoded_value;
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/* error code */
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len += decode_tag_number_and_value(&apdu[len],
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&tag_number, &len_value_type);
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if (tag_number != BACNET_APPLICATION_TAG_ENUMERATED)
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return 0;
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len +=
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decode_enumerated(&apdu[len], len_value_type, &decoded_value);
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if (error_code)
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*error_code = decoded_value;
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}
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return len;
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}
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/* decode the service request only */
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int bacerror_decode_service_request(uint8_t * apdu,
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unsigned apdu_len,
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uint8_t * invoke_id,
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BACNET_CONFIRMED_SERVICE * service,
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BACNET_ERROR_CLASS * error_class, BACNET_ERROR_CODE * error_code)
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{
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int len = 0;
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if (apdu_len > 2) {
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if (invoke_id)
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*invoke_id = apdu[0];
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if (service)
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*service = apdu[1];
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/* decode the application class and code */
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len = bacerror_decode_error_class_and_code(&apdu[2],
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apdu_len - 2, error_class, error_code);
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}
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return len;
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}
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/* decode the whole APDU - mainly used for unit testing */
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int bacerror_decode_apdu(uint8_t * apdu,
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unsigned apdu_len,
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uint8_t * invoke_id,
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BACNET_CONFIRMED_SERVICE * service,
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BACNET_ERROR_CLASS * error_class, BACNET_ERROR_CODE * error_code)
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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_len) {
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if (apdu[0] != PDU_TYPE_ERROR)
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return -1;
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if (apdu_len > 1) {
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len = bacerror_decode_service_request(&apdu[1],
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apdu_len - 1, invoke_id, service, error_class, error_code);
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}
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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 testBACError(Test * pTest)
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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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uint8_t invoke_id = 0;
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BACNET_CONFIRMED_SERVICE service = 0;
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BACNET_ERROR_CLASS error_class = 0;
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BACNET_ERROR_CODE error_code = 0;
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uint8_t test_invoke_id = 0;
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BACNET_CONFIRMED_SERVICE test_service = 0;
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BACNET_ERROR_CLASS test_error_class = 0;
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BACNET_ERROR_CODE test_error_code = 0;
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len = bacerror_encode_apdu(&apdu[0],
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invoke_id, service, error_class, error_code);
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ct_test(pTest, len != 0);
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apdu_len = len;
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len = bacerror_decode_apdu(&apdu[0],
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apdu_len,
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&test_invoke_id,
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&test_service, &test_error_class, &test_error_code);
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ct_test(pTest, len != -1);
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ct_test(pTest, test_invoke_id == invoke_id);
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ct_test(pTest, test_service == service);
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ct_test(pTest, test_error_class == error_class);
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ct_test(pTest, test_error_code == error_code);
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/* change type to get negative response */
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apdu[0] = PDU_TYPE_ABORT;
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len = bacerror_decode_apdu(&apdu[0],
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apdu_len,
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&test_invoke_id,
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&test_service, &test_error_class, &test_error_code);
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ct_test(pTest, len == -1);
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/* test NULL APDU */
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len = bacerror_decode_apdu(NULL,
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apdu_len,
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&test_invoke_id,
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&test_service, &test_error_class, &test_error_code);
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ct_test(pTest, len == -1);
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/* force a zero length */
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len = bacerror_decode_apdu(&apdu[0],
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0,
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&test_invoke_id,
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&test_service, &test_error_class, &test_error_code);
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ct_test(pTest, len == 0);
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/* check them all... */
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for (service = 0; service < MAX_BACNET_CONFIRMED_SERVICE; service++) {
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for (error_class = 0;
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error_class < MAX_BACNET_ERROR_CLASS; error_class++) {
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for (error_code = 0;
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error_code < MAX_BACNET_ERROR_CODE; error_code++) {
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len = bacerror_encode_apdu(&apdu[0],
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invoke_id, service, error_class, error_code);
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apdu_len = len;
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ct_test(pTest, len != 0);
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len = bacerror_decode_apdu(&apdu[0],
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apdu_len,
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&test_invoke_id,
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&test_service, &test_error_class, &test_error_code);
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ct_test(pTest, len != -1);
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ct_test(pTest, test_invoke_id == invoke_id);
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ct_test(pTest, test_service == service);
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ct_test(pTest, test_error_class == error_class);
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ct_test(pTest, test_error_code == error_code);
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}
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}
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}
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/* max boundaries */
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service = 255;
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error_class = LAST_PROPRIETARY_ERROR_CLASS;
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error_code = LAST_PROPRIETARY_ERROR_CODE;
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len = bacerror_encode_apdu(&apdu[0],
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invoke_id, service, error_class, error_code);
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apdu_len = len;
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ct_test(pTest, len != 0);
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len = bacerror_decode_apdu(&apdu[0],
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apdu_len,
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&test_invoke_id,
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&test_service, &test_error_class, &test_error_code);
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ct_test(pTest, len != -1);
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ct_test(pTest, test_invoke_id == invoke_id);
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ct_test(pTest, test_service == service);
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ct_test(pTest, test_error_class == error_class);
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ct_test(pTest, test_error_code == error_code);
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}
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#ifdef TEST_BACERROR
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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 Error", NULL);
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/* individual tests */
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rc = ct_addTestFunction(pTest, testBACError);
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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_ERROR */
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#endif /* TEST */
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