Carlos Gomes Martinho
981d4036c8
* refactor: rename test macro to prevent collisions * style: align cmake epilog * refactor: rename define in makefiles
241 lines
7.2 KiB
C
241 lines
7.2 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 "bacnet/bacenum.h"
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#include "bacnet/bacdef.h"
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#include "bacnet/npdu.h"
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#include "bacnet/dcc.h"
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#include "bacnet/bacdcode.h"
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#include "bacnet/iam.h"
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/** @file iam.c Encode/Decode I-Am service */
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/**
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* @brief Encode the I-Am service.
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*
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* @param apdu Transmit buffer
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* @param device_id Device Id
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* @param max_apdu Transmit buffer size.
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* @param segmentation True, if segmentation shall be featured.
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* @param vendor_id Vendor Id
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*
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* @return Total length of the apdu, zero otherwise.
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*/
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int iam_encode_apdu(uint8_t *apdu,
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uint32_t device_id,
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unsigned max_apdu,
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int segmentation,
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uint16_t vendor_id)
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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) {
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apdu[0] = PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST;
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apdu[1] = SERVICE_UNCONFIRMED_I_AM; /* service choice */
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apdu_len = 2;
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len = encode_application_object_id(
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&apdu[apdu_len], OBJECT_DEVICE, device_id);
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apdu_len += len;
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len = encode_application_unsigned(&apdu[apdu_len], max_apdu);
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apdu_len += len;
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len = encode_application_enumerated(
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&apdu[apdu_len], (uint32_t)segmentation);
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apdu_len += len;
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len = encode_application_unsigned(&apdu[apdu_len], vendor_id);
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apdu_len += len;
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}
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return apdu_len;
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}
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/**
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* @brief Decode the I-Am service.
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*
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* @param apdu Receive buffer
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* @param pDevice_id Pointer to the variable that shal ltake the device Id.
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* @param pMax_apdu Pointer to a variable that shall take the decoded length.
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* @param pSegmentation Pointer to a variable taking if segmentation is used.
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* @param pVendor_id Pointer to a variable taking the vendor id.
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*
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* @return Total length of the apdu, zero otherwise.
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*/
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int iam_decode_service_request(uint8_t *apdu,
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uint32_t *pDevice_id,
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unsigned *pMax_apdu,
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int *pSegmentation,
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uint16_t *pVendor_id)
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{
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int len = 0;
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int apdu_len = 0; /* total length of the apdu, return value */
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/* should be a Device Object */
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BACNET_OBJECT_TYPE object_type = OBJECT_NONE;
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uint32_t object_instance = 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 enum_value = 0;
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BACNET_UNSIGNED_INTEGER unsigned_value = 0;
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/* OBJECT ID - object id */
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len = decode_tag_number_and_value(&apdu[apdu_len], &tag_number, &len_value);
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apdu_len += len;
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if (tag_number != BACNET_APPLICATION_TAG_OBJECT_ID) {
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return -1;
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}
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len = decode_object_id(&apdu[apdu_len], &object_type, &object_instance);
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apdu_len += len;
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if (object_type != OBJECT_DEVICE) {
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return -1;
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}
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if (pDevice_id) {
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*pDevice_id = object_instance;
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}
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/* MAX APDU - unsigned */
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len = decode_tag_number_and_value(&apdu[apdu_len], &tag_number, &len_value);
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apdu_len += len;
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if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) {
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return -1;
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}
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len = decode_unsigned(&apdu[apdu_len], len_value, &unsigned_value);
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apdu_len += len;
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if (pMax_apdu) {
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*pMax_apdu = (unsigned)unsigned_value;
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}
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/* Segmentation - enumerated */
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len = decode_tag_number_and_value(&apdu[apdu_len], &tag_number, &len_value);
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apdu_len += len;
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if (tag_number != BACNET_APPLICATION_TAG_ENUMERATED) {
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return -1;
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}
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len = decode_enumerated(&apdu[apdu_len], len_value, &enum_value);
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apdu_len += len;
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if (enum_value >= MAX_BACNET_SEGMENTATION) {
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return -1;
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}
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if (pSegmentation) {
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*pSegmentation = (int)enum_value;
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}
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/* Vendor ID - unsigned16 */
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len = decode_tag_number_and_value(&apdu[apdu_len], &tag_number, &len_value);
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apdu_len += len;
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if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) {
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return -1;
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}
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len = decode_unsigned(&apdu[apdu_len], len_value, &unsigned_value);
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apdu_len += len;
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if (unsigned_value > 0xFFFF) {
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return -1;
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}
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if (pVendor_id) {
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*pVendor_id = (uint16_t)unsigned_value;
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}
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return apdu_len;
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}
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#ifdef BAC_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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int iam_decode_apdu(uint8_t *apdu,
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uint32_t *pDevice_id,
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unsigned *pMax_apdu,
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int *pSegmentation,
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uint16_t *pVendor_id)
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{
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int apdu_len = 0; /* total length of the apdu, return value */
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/* valid data? */
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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_I_AM)
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return -1;
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apdu_len = iam_decode_service_request(
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&apdu[2], pDevice_id, pMax_apdu, pSegmentation, pVendor_id);
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return apdu_len;
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}
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void testIAm(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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uint32_t device_id = 42;
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unsigned max_apdu = 480;
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int segmentation = SEGMENTATION_NONE;
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uint16_t vendor_id = 42;
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uint32_t test_device_id = 0;
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unsigned test_max_apdu = 0;
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int test_segmentation = 0;
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uint16_t test_vendor_id = 0;
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len =
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iam_encode_apdu(&apdu[0], device_id, max_apdu, segmentation, vendor_id);
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ct_test(pTest, len != 0);
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len = iam_decode_apdu(&apdu[0], &test_device_id, &test_max_apdu,
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&test_segmentation, &test_vendor_id);
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ct_test(pTest, len != -1);
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ct_test(pTest, test_device_id == device_id);
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ct_test(pTest, test_vendor_id == vendor_id);
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ct_test(pTest, test_max_apdu == max_apdu);
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ct_test(pTest, test_segmentation == segmentation);
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}
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#ifdef TEST_IAM
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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 I-Am", NULL);
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/* individual tests */
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rc = ct_addTestFunction(pTest, testIAm);
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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_IAM */
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#endif /* BAC_TEST */
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