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bacnet_stack/src/bacnet/whohas.c
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Steve Karg 15dce68947 make pretty using clang-format 10
2020-06-19 14:44:32 -05:00

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/*####COPYRIGHTBEGIN####
-------------------------------------------
Copyright (C) 2006 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 <stdint.h>
#include "bacnet/bacenum.h"
#include "bacnet/bacdcode.h"
#include "bacnet/bacdef.h"
#include "bacnet/whohas.h"
/** @file whohas.c Encode/Decode Who-Has requests */
/** Encode Who-Hasservice - use -1 for limit for unlimited
*
* @param apdu Pointer to the APDU.
* @param data Pointer to the Who-Has application data.
*
* @return Bytes encoded. */
int whohas_encode_apdu(uint8_t *apdu, BACNET_WHO_HAS_DATA *data)
{
int len = 0; /* length of each encoding */
int apdu_len = 0; /* total length of the apdu, return value */
if (apdu && data) {
apdu[0] = PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST;
apdu[1] = SERVICE_UNCONFIRMED_WHO_HAS; /* service choice */
apdu_len = 2;
/* optional limits - must be used as a pair */
if ((data->low_limit >= 0) &&
(data->low_limit <= BACNET_MAX_INSTANCE) &&
(data->high_limit >= 0) &&
(data->high_limit <= BACNET_MAX_INSTANCE)) {
len = encode_context_unsigned(&apdu[apdu_len], 0, data->low_limit);
apdu_len += len;
len = encode_context_unsigned(&apdu[apdu_len], 1, data->high_limit);
apdu_len += len;
}
if (data->is_object_name) {
len = encode_context_character_string(
&apdu[apdu_len], 3, &data->object.name);
apdu_len += len;
} else {
len = encode_context_object_id(&apdu[apdu_len], 2,
data->object.identifier.type, data->object.identifier.instance);
apdu_len += len;
}
}
return apdu_len;
}
/** Decode the Who-Has service request only.
*
* @param apdu Pointer to the received data.
* @param apdu_len Bytes valid in the receive buffer.
* @param data Pointer to the application dta to be filled in.
*
* @return Bytes decoded. */
int whohas_decode_service_request(
uint8_t *apdu, unsigned apdu_len, BACNET_WHO_HAS_DATA *data)
{
int len = 0;
uint8_t tag_number = 0;
uint32_t len_value = 0;
BACNET_UNSIGNED_INTEGER unsigned_value = 0;
BACNET_OBJECT_TYPE decoded_type = OBJECT_NONE;
if (apdu_len && data) {
/* optional limits - must be used as a pair */
if (decode_is_context_tag(&apdu[len], 0)) {
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
if ((unsigned)len < apdu_len) {
len += decode_unsigned(&apdu[len], len_value, &unsigned_value);
if ((unsigned)len < apdu_len) {
if (unsigned_value <= BACNET_MAX_INSTANCE) {
data->low_limit = unsigned_value;
}
if (!decode_is_context_tag(&apdu[len], 1)) {
return -1;
}
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
if ((unsigned)len < apdu_len) {
len += decode_unsigned(
&apdu[len], len_value, &unsigned_value);
if (unsigned_value <= BACNET_MAX_INSTANCE) {
data->high_limit = unsigned_value;
}
}
}
}
} else {
data->low_limit = -1;
data->high_limit = -1;
}
/* object id */
if ((unsigned)len < apdu_len) {
if (decode_is_context_tag(&apdu[len], 2)) {
data->is_object_name = false;
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
if ((unsigned)len < apdu_len) {
len += decode_object_id(&apdu[len], &decoded_type,
&data->object.identifier.instance);
data->object.identifier.type = decoded_type;
}
}
/* object name */
else if (decode_is_context_tag(&apdu[len], 3)) {
data->is_object_name = true;
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
if ((unsigned)len < apdu_len) {
len += decode_character_string(
&apdu[len], len_value, &data->object.name);
}
} else {
/* missing required parameters */
return -1;
}
} else {
/* message too short */
return -1;
}
}
return len;
}
#ifdef BAC_TEST
#include <assert.h>
#include <string.h>
#include "ctest.h"
int whohas_decode_apdu(
uint8_t *apdu, unsigned apdu_len, BACNET_WHO_HAS_DATA *data)
{
int len = 0;
if (!apdu)
return -1;
/* optional checking - most likely was already done prior to this call */
if (apdu[0] != PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST)
return -1;
if (apdu[1] != SERVICE_UNCONFIRMED_WHO_HAS)
return -1;
/* optional limits - must be used as a pair */
if (apdu_len > 2) {
len = whohas_decode_service_request(&apdu[2], apdu_len - 2, data);
}
return len;
}
void testWhoHasData(Test *pTest, BACNET_WHO_HAS_DATA *data)
{
uint8_t apdu[480] = { 0 };
int len = 0;
int apdu_len = 0;
BACNET_WHO_HAS_DATA test_data;
len = whohas_encode_apdu(&apdu[0], data);
ct_test(pTest, len != 0);
apdu_len = len;
len = whohas_decode_apdu(&apdu[0], apdu_len, &test_data);
ct_test(pTest, len != -1);
ct_test(pTest, test_data.low_limit == data->low_limit);
ct_test(pTest, test_data.high_limit == data->high_limit);
ct_test(pTest, test_data.is_object_name == data->is_object_name);
/* Object ID */
if (data->is_object_name == false) {
ct_test(pTest,
test_data.object.identifier.type == data->object.identifier.type);
ct_test(pTest,
test_data.object.identifier.instance ==
data->object.identifier.instance);
}
/* Object Name */
else {
ct_test(pTest,
characterstring_same(&test_data.object.name, &data->object.name));
}
}
void testWhoHas(Test *pTest)
{
BACNET_WHO_HAS_DATA data;
data.low_limit = -1;
data.high_limit = -1;
data.is_object_name = false;
data.object.identifier.type = OBJECT_ANALOG_INPUT;
data.object.identifier.instance = 1;
testWhoHasData(pTest, &data);
for (data.low_limit = 0; data.low_limit <= BACNET_MAX_INSTANCE;
data.low_limit += (BACNET_MAX_INSTANCE / 4)) {
for (data.high_limit = 0; data.high_limit <= BACNET_MAX_INSTANCE;
data.high_limit += (BACNET_MAX_INSTANCE / 4)) {
data.is_object_name = false;
for (data.object.identifier.type = OBJECT_ANALOG_INPUT;
data.object.identifier.type < MAX_BACNET_OBJECT_TYPE;
data.object.identifier.type++) {
for (data.object.identifier.instance = 1;
data.object.identifier.instance <= BACNET_MAX_INSTANCE;
data.object.identifier.instance <<= 1) {
testWhoHasData(pTest, &data);
}
}
data.is_object_name = true;
characterstring_init_ansi(&data.object.name, "patricia");
testWhoHasData(pTest, &data);
}
}
}
#ifdef TEST_WHOHAS
int main(void)
{
Test *pTest;
bool rc;
pTest = ct_create("BACnet Who-Has", NULL);
/* individual tests */
rc = ct_addTestFunction(pTest, testWhoHas);
assert(rc);
ct_setStream(pTest, stdout);
ct_run(pTest);
(void)ct_report(pTest);
ct_destroy(pTest);
return 0;
}
#endif /* TEST_WHOIS */
#endif /* BAC_TEST */
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