/*####COPYRIGHTBEGIN#### ------------------------------------------- Copyright (C) 2005 Steve Karg This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: The Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA. As a special exception, if other files instantiate templates or use macros or inline functions from this file, or you compile this file and link it with other works to produce a work based on this file, this file does not by itself cause the resulting work to be covered by the GNU General Public License. However the source code for this file must still be made available in accordance with section (3) of the GNU General Public License. This exception does not invalidate any other reasons why a work based on this file might be covered by the GNU General Public License. ------------------------------------------- ####COPYRIGHTEND####*/ #include #include "bacenum.h" #include "bacdcode.h" #include "bacdef.h" // encode service int bacerror_encode_apdu( uint8_t *apdu, uint8_t invoke_id, BACNET_CONFIRMED_SERVICE service, BACNET_ERROR_CLASS error_class, BACNET_ERROR_CODE error_code) { int apdu_len = 0; // total length of the apdu, return value if (apdu) { apdu[0] = PDU_TYPE_ERROR; apdu[1] = invoke_id; apdu[2] = service; apdu_len = 3; // service parameters apdu_len += encode_tagged_enumerated(&apdu[apdu_len], error_class); apdu_len += encode_tagged_enumerated(&apdu[apdu_len], error_code); } return apdu_len; } // decode the service request only int bacerror_decode_service_request( uint8_t *apdu, unsigned apdu_len, uint8_t *invoke_id, BACNET_CONFIRMED_SERVICE *service, BACNET_ERROR_CLASS *error_class, BACNET_ERROR_CODE *error_code) { int len = 0; uint8_t tag_number = 0; uint32_t len_value_type = 0; int decoded_value = 0; if (apdu_len > 2) { if (invoke_id) *invoke_id = apdu[0]; if (service) *service = apdu[1]; len = 2; // error class len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value_type); if (tag_number != BACNET_APPLICATION_TAG_ENUMERATED) return 0; len += decode_enumerated(&apdu[len],len_value_type, &decoded_value); if (error_class) *error_class = decoded_value; // error code len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value_type); if (tag_number != BACNET_APPLICATION_TAG_ENUMERATED) return 0; len += decode_enumerated(&apdu[len],len_value_type, &decoded_value); if (error_code) *error_code = decoded_value; } return len; } // decode the whole APDU - mainly used for unit testing int bacerror_decode_apdu( uint8_t *apdu, unsigned apdu_len, uint8_t *invoke_id, BACNET_CONFIRMED_SERVICE *service, BACNET_ERROR_CLASS *error_class, BACNET_ERROR_CODE *error_code) { int len = 0; if (!apdu) return -1; // optional checking - most likely was already done prior to this call if (apdu_len) { if (apdu[0] != PDU_TYPE_ERROR) return -1; if (apdu_len > 1) { len = bacerror_decode_service_request( &apdu[1], apdu_len - 1, invoke_id, service, error_class, error_code); } } return len; } #ifdef TEST #include #include #include "ctest.h" void testBACError(Test * pTest) { uint8_t apdu[480] = {0}; int len = 0; int apdu_len = 0; uint8_t invoke_id = 0; BACNET_CONFIRMED_SERVICE service = 0; BACNET_ERROR_CLASS error_class = 0; BACNET_ERROR_CODE error_code = 0; uint8_t test_invoke_id = 0; BACNET_CONFIRMED_SERVICE test_service = 0; BACNET_ERROR_CLASS test_error_class = 0; BACNET_ERROR_CODE test_error_code = 0; len = bacerror_encode_apdu( &apdu[0], invoke_id, service, error_class, error_code); ct_test(pTest, len != 0); apdu_len = len; len = bacerror_decode_apdu( &apdu[0], apdu_len, &test_invoke_id, &test_service, &test_error_class, &test_error_code); ct_test(pTest, len != -1); ct_test(pTest, test_invoke_id == invoke_id); ct_test(pTest, test_service == service); ct_test(pTest, test_error_class == error_class); ct_test(pTest, test_error_code == error_code); // change type to get negative response apdu[0] = PDU_TYPE_ABORT; len = bacerror_decode_apdu( &apdu[0], apdu_len, &test_invoke_id, &test_service, &test_error_class, &test_error_code); ct_test(pTest, len == -1); // test NULL APDU len = bacerror_decode_apdu( NULL, apdu_len, &test_invoke_id, &test_service, &test_error_class, &test_error_code); ct_test(pTest, len == -1); // force a zero length len = bacerror_decode_apdu( &apdu[0], 0, &test_invoke_id, &test_service, &test_error_class, &test_error_code); ct_test(pTest, len == 0); // check them all... for ( service = 0; service < MAX_BACNET_CONFIRMED_SERVICE; service++) { for ( error_class = 0; error_class < MAX_BACNET_ERROR_CLASS; error_class++) { for ( error_code = 0; error_code < MAX_BACNET_ERROR_CODE; error_code++) { len = bacerror_encode_apdu( &apdu[0], invoke_id, service, error_class, error_code); apdu_len = len; ct_test(pTest, len != 0); len = bacerror_decode_apdu( &apdu[0], apdu_len, &test_invoke_id, &test_service, &test_error_class, &test_error_code); ct_test(pTest, len != -1); ct_test(pTest, test_invoke_id == invoke_id); ct_test(pTest, test_service == service); ct_test(pTest, test_error_class == error_class); ct_test(pTest, test_error_code == error_code); } } } // max boundaries service = 255; error_class = LAST_PROPRIETARY_ERROR_CLASS; error_code = LAST_PROPRIETARY_ERROR_CODE; len = bacerror_encode_apdu( &apdu[0], invoke_id, service, error_class, error_code); apdu_len = len; ct_test(pTest, len != 0); len = bacerror_decode_apdu( &apdu[0], apdu_len, &test_invoke_id, &test_service, &test_error_class, &test_error_code); ct_test(pTest, len != -1); ct_test(pTest, test_invoke_id == invoke_id); ct_test(pTest, test_service == service); ct_test(pTest, test_error_class == error_class); ct_test(pTest, test_error_code == error_code); } #ifdef TEST_BACERROR int main(void) { Test *pTest; bool rc; pTest = ct_create("BACnet Error", NULL); /* individual tests */ rc = ct_addTestFunction(pTest, testBACError); assert(rc); ct_setStream(pTest, stdout); ct_run(pTest); (void) ct_report(pTest); ct_destroy(pTest); return 0; } #endif /* TEST_ERROR */ #endif /* TEST */