/*####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" #include "device.h" #include "wp.h" // encode service int wp_encode_apdu( uint8_t *apdu, uint8_t invoke_id, BACNET_WRITE_PROPERTY_DATA *data) { int len = 0; // length of each encoding int apdu_len = 0; // total length of the apdu, return value if (apdu) { apdu[0] = PDU_TYPE_CONFIRMED_SERVICE_REQUEST; apdu[1] = encode_max_segs_max_apdu(0, Device_Max_APDU_Length_Accepted()); apdu[2] = invoke_id; apdu[3] = SERVICE_CONFIRMED_WRITE_PROPERTY; // service choice apdu_len = 4; apdu_len += encode_context_object_id(&apdu[apdu_len], 0, data->object_type, data->object_instance); apdu_len += encode_context_enumerated(&apdu[apdu_len], 1, data->object_property); /* optional array index; ALL is -1 which is assumed when missing */ if (data->array_index != BACNET_ARRAY_ALL) apdu_len += encode_context_unsigned(&apdu[apdu_len], 2, data->array_index); // propertyValue apdu_len += encode_opening_tag(&apdu[apdu_len], 3); for (len = 0; len < data->property_value_len; len++) { apdu[apdu_len++] = data->property_value[len]; } apdu_len += encode_closing_tag(&apdu[apdu_len], 3); // optional priority - 0 if not set, 1..16 if set if (data->priority) apdu_len += encode_context_unsigned(&apdu[apdu_len], 4, data->priority); } return apdu_len; } // decode the service request only int wp_decode_service_request( uint8_t *apdu, unsigned apdu_len, BACNET_WRITE_PROPERTY_DATA *data) { int len = 0; int tag_len = 0; uint8_t tag_number = 0; uint32_t len_value_type = 0; int type = 0; // for decoding int property = 0; // for decoding unsigned unsigned_value = 0; // check for value pointers if (apdu_len && data) { // Tag 0: Object ID if (!decode_is_context_tag(&apdu[len++], 0)) return -1; len += decode_object_id(&apdu[len], &type, &data->object_instance); data->object_type = type; // Tag 1: Property ID len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value_type); if (tag_number != 1) return -1; len += decode_enumerated(&apdu[len], len_value_type, &property); data->object_property = property; // Tag 2: Optional Array Index // note: decode without incrementing len so we can check for opening tag tag_len = decode_tag_number_and_value(&apdu[len], &tag_number, &len_value_type); if (tag_number == 2) { len += tag_len; len += decode_unsigned(&apdu[len], len_value_type, &unsigned_value); data->array_index = unsigned_value; } else data->array_index = BACNET_ARRAY_ALL; // Tag 3: opening context tag */ if (decode_is_opening_tag_number(&apdu[len], 3)) { // a tag number of 3 is not extended so only one octet len++; // don't decode the property value here data->property_value = &apdu[len]; data->property_value_len = apdu_len - len; } else return -1; // Tag 4: optional Priority // FIXME: if the property value is not easily sized here, // then just have the application decode the property value // and the priority } return len; } int wp_decode_apdu( uint8_t *apdu, unsigned apdu_len, uint8_t *invoke_id, BACNET_WRITE_PROPERTY_DATA *data) { int len = 0; int offset = 0; if (!apdu) return -1; // optional checking - most likely was already done prior to this call if (apdu[0] != PDU_TYPE_CONFIRMED_SERVICE_REQUEST) return -1; // apdu[1] = encode_max_segs_max_apdu(0, Device_Max_APDU_Length_Accepted()); *invoke_id = apdu[2]; /* invoke id - filled in by net layer */ if (apdu[3] != SERVICE_CONFIRMED_WRITE_PROPERTY) return -1; offset = 4; if (apdu_len > offset) { len = wp_decode_service_request( &apdu[offset], apdu_len - offset, data); } return len; } #ifdef TEST #include #include #include "ctest.h" void testWriteProperty(Test * pTest) { uint8_t apdu[480] = {0}; int len = 0; int apdu_len = 0; uint8_t invoke_id = 128; uint8_t test_invoke_id = 0; BACNET_WRITE_PROPERTY_DATA data = {0}; BACNET_WRITE_PROPERTY_DATA test_data = {0}; // FIXME: test values for data len = wp_encode_apdu( &apdu[0], invoke_id, &data); ct_test(pTest, len != 0); apdu_len = len; len = wp_decode_apdu( &apdu[0], apdu_len, &test_invoke_id, &test_data); ct_test(pTest, len != -1); ct_test(pTest, test_data.object_type == data.object_type); ct_test(pTest, test_data.object_instance == data.object_instance); ct_test(pTest, test_data.object_property == data.object_property); ct_test(pTest, test_data.array_index == data.array_index); return; } #ifdef TEST_WRITE_PROPERTY int main(void) { Test *pTest; bool rc; pTest = ct_create("BACnet WriteProperty", NULL); /* individual tests */ rc = ct_addTestFunction(pTest, testWriteProperty); assert(rc); ct_setStream(pTest, stdout); ct_run(pTest); (void) ct_report(pTest); ct_destroy(pTest); return 0; } #endif /* TEST_WRITE_PROPERTY */ #endif /* TEST */