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bacnet_stack/src/bacnet/cov.c
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Steve Karg 1520f2c612 Add core stack headers into bacdef.h and cleanup includes. (#602) 
* Added dependent BACnet stack headers into bacdef.h file.

* Changed bacdef.h and other stack includes in c/h files to have a common pattern.

* Moved bits.h, bytes.h, and bacnet_stack_exports.h under bacnet/basic/sys/ folder.
2024-03-15 16:58:52 -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>
/* BACnet Stack defines - first */
#include "bacnet/bacdef.h"
/* BACnet Stack API */
#include "bacnet/bacdcode.h"
#include "bacnet/bacapp.h"
/* me! */
#include "bacnet/cov.h"
/** @file cov.c Encode/Decode Change of Value (COV) services */
/* Change-Of-Value Services
COV Subscribe
COV Subscribe Property
COV Notification
Unconfirmed COV Notification
*/
/**
* @brief Encode APDU for COV Notification.
* @param apdu Pointer to the buffer, or NULL for length
* @param data Pointer to the data to encode.
* @return number of bytes encoded, or zero on error.
*/
int cov_notify_encode_apdu(uint8_t *apdu, BACNET_COV_DATA *data)
{
int len = 0; /* length of each encoding */
int apdu_len = 0; /* total length of the apdu, return value */
BACNET_PROPERTY_VALUE *value = NULL; /* value in list */
if (!data) {
return 0;
}
/* tag 0 - subscriberProcessIdentifier */
len =
encode_context_unsigned(apdu, 0, data->subscriberProcessIdentifier);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 1 - initiatingDeviceIdentifier */
len = encode_context_object_id(
apdu, 1, OBJECT_DEVICE, data->initiatingDeviceIdentifier);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 2 - monitoredObjectIdentifier */
len = encode_context_object_id(apdu, 2,
data->monitoredObjectIdentifier.type,
data->monitoredObjectIdentifier.instance);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 3 - timeRemaining */
len = encode_context_unsigned(apdu, 3, data->timeRemaining);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 4 - listOfValues */
len = encode_opening_tag(apdu, 4);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* the first value includes a pointer to the next value, etc */
value = data->listOfValues;
while (value != NULL) {
len = bacapp_property_value_encode(apdu, value);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* is there another one to encode? */
value = value->next;
}
len = encode_closing_tag(apdu, 4);
apdu_len += len;
return apdu_len;
}
/**
* @brief Encode the COVNotification service request
* @param apdu Pointer to the buffer for encoding into
* @param apdu_size number of bytes available in the buffer
* @param data Pointer to the service data used for encoding values
* @return number of bytes encoded, or zero if unable to encode or too large
*/
size_t cov_notify_service_request_encode(
uint8_t *apdu, size_t apdu_size, BACNET_COV_DATA *data)
{
size_t apdu_len = 0; /* total length of the apdu, return value */
apdu_len = cov_notify_encode_apdu(NULL, data);
if (apdu_len > apdu_size) {
apdu_len = 0;
} else {
apdu_len = cov_notify_encode_apdu(apdu, data);
}
return apdu_len;
}
/**
* Encode APDU for confirmed notification.
*
* @param apdu Pointer to the buffer, or NULL for length
* @param apdu_size number of bytes available in the buffer
* @param invoke_id ID to invoke for notification
* @param data Pointer to the data to encode.
*
* @return bytes encoded or zero on error.
*/
int ccov_notify_encode_apdu(uint8_t *apdu,
unsigned apdu_size,
uint8_t invoke_id,
BACNET_COV_DATA *data)
{
int len = 0; /* length of each encoding */
int apdu_len = 0; /* return value */
if (apdu && (apdu_size > 4)) {
apdu[0] = PDU_TYPE_CONFIRMED_SERVICE_REQUEST;
apdu[1] = encode_max_segs_max_apdu(0, MAX_APDU);
apdu[2] = invoke_id;
apdu[3] = SERVICE_CONFIRMED_COV_NOTIFICATION;
}
len = 4;
apdu_len += len;
if (apdu) {
apdu += len;
}
len = cov_notify_service_request_encode(
apdu, apdu_size - apdu_len, data);
if (len > 0) {
apdu_len += len;
} else {
apdu_len = 0;
}
return apdu_len;
}
/**
* @brief Encode APDU for unconfirmed notification.
* @param apdu Pointer to the buffer for encoding into, or NULL for length
* @param apdu_size number of bytes available in the buffer
* @param data Pointer to the service data used for encoding values
* @return number of bytes encoded, or zero if unable to encode or too large
*/
int ucov_notify_encode_apdu(
uint8_t *apdu, unsigned apdu_size, BACNET_COV_DATA *data)
{
int len = 0; /* length of each encoding */
int apdu_len = 0; /* return value */
if (apdu && (apdu_size > 2)) {
apdu[0] = PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST;
apdu[1] = SERVICE_UNCONFIRMED_COV_NOTIFICATION;
}
len = 2;
apdu_len += len;
if (apdu) {
apdu += len;
}
len = cov_notify_service_request_encode(
apdu, apdu_size - apdu_len, data);
if (len > 0) {
apdu_len += len;
} else {
apdu_len = 0;
}
return apdu_len;
}
/**
* @brief Decode the COV-service request only.
*
* ConfirmedCOVNotification-Request ::= SEQUENCE {
* subscriber-process-identifier [0] Unsigned32,
* initiating-device-identifier [1] BACnetObjectIdentifier,
* monitored-object-identifier [2] BACnetObjectIdentifier,
* time-remaining [3] Unsigned,
* list-of-values [4] SEQUENCE OF BACnetPropertyValue
* }
*
* @note: COV and Unconfirmed COV are the same.
* @param apdu Pointer to the buffer.
* @param apdu_size Number of valid bytes in the buffer.
* @param data Pointer to the data to store the decoded values, or NULL
*
* @return Bytes decoded or BACNET_STATUS_ERROR on error.
*/
int cov_notify_decode_service_request(
uint8_t *apdu, unsigned apdu_size, BACNET_COV_DATA *data)
{
int len = 0; /* return value */
int value_len = 0, tag_len = 0;
BACNET_UNSIGNED_INTEGER decoded_value = 0;
BACNET_OBJECT_TYPE decoded_type = OBJECT_NONE;
uint32_t decoded_instance = 0;
BACNET_PROPERTY_ID property_identifier = PROP_ALL;
BACNET_PROPERTY_VALUE *value = NULL;
/* subscriber-process-identifier [0] Unsigned32 */
value_len = bacnet_unsigned_context_decode(
&apdu[len], apdu_size - len, 0, &decoded_value);
if (value_len > 0) {
if (data) {
data->subscriberProcessIdentifier = decoded_value;
}
len += value_len;
} else {
return BACNET_STATUS_ERROR;
}
/* initiating-device-identifier [1] BACnetObjectIdentifier */
value_len = bacnet_object_id_context_decode(
&apdu[len], apdu_size - len, 1, &decoded_type, &decoded_instance);
if (value_len > 0) {
if (decoded_type != OBJECT_DEVICE) {
return BACNET_STATUS_ERROR;
}
if (data) {
data->initiatingDeviceIdentifier = decoded_instance;
}
len += value_len;
} else {
return BACNET_STATUS_ERROR;
}
/* monitored-object-identifier [2] BACnetObjectIdentifier */
value_len = bacnet_object_id_context_decode(
&apdu[len], apdu_size - len, 2, &decoded_type, &decoded_instance);
if (value_len > 0) {
if (data) {
data->monitoredObjectIdentifier.type = decoded_type;
data->monitoredObjectIdentifier.instance = decoded_instance;
}
len += value_len;
} else {
return BACNET_STATUS_ERROR;
}
/* time-remaining [3] Unsigned */
value_len = bacnet_unsigned_context_decode(
&apdu[len], apdu_size - len, 3, &decoded_value);
if (value_len > 0) {
if (data) {
data->timeRemaining = decoded_value;
}
len += value_len;
} else {
return BACNET_STATUS_ERROR;
}
/* list-of-values [4] SEQUENCE OF BACnetPropertyValue */
if (bacnet_is_opening_tag_number(
&apdu[len], apdu_size - len, 4, &tag_len)) {
if (data) {
len += tag_len;
/* the first value includes a pointer to the next value, etc */
value = data->listOfValues;
while (value != NULL) {
value_len = bacapp_property_value_decode(
&apdu[len], apdu_size - len, value);
if (value_len == BACNET_STATUS_ERROR) {
return BACNET_STATUS_ERROR;
} else {
len += value_len;
}
/* end of list? */
if (bacnet_is_closing_tag_number(
&apdu[len], apdu_size - len, 4, &tag_len)) {
len += tag_len;
value->next = NULL;
break;
}
/* is there another one to decode? */
value = value->next;
if (value == NULL) {
/* out of room to store next value */
return BACNET_STATUS_ERROR;
}
}
} else {
/* this len function needs to start at the opening tag
to match opening/closing tags like a stack.
However, it returns the len between the tags. */
value_len = bacapp_data_len(&apdu[len], apdu_size - len,
(BACNET_PROPERTY_ID)property_identifier);
len += value_len;
/* add the opening tag length to the totals */
len += tag_len;
}
}
return len;
}
/*
12.11.38Active_COV_Subscriptions
The Active_COV_Subscriptions property is a List of BACnetCOVSubscription,
each of which consists of a Recipient, a Monitored Property Reference,
an Issue Confirmed Notifications flag, a Time Remaining value and an
optional COV Increment. This property provides a network-visible indication
of those COV subscriptions that are active at any given time.
Whenever a COV Subscription is created with the SubscribeCOV or
SubscribeCOVProperty service, a new entry is added to
the Active_COV_Subscriptions list. Similarly, whenever a COV Subscription
is terminated, the corresponding entry shall be
removed from the Active_COV_Subscriptions list.
*/
/*
SubscribeCOV-Request ::= SEQUENCE {
subscriberProcessIdentifier [0] Unsigned32,
monitoredObjectIdentifier [1] BACnetObjectIdentifier,
issueConfirmedNotifications [2] BOOLEAN OPTIONAL,
lifetime [3] Unsigned OPTIONAL
}
*/
/**
* @brief Encode APDU for SubscribeCOV-Request
* @note COV and Unconfirmed COV are the same encodings
* @param apdu Pointer to the buffer, or NULL for length
* @param data Pointer to the data to encode.
* @return number of bytes encoded, or zero on error.
*/
int cov_subscribe_apdu_encode(uint8_t *apdu, BACNET_SUBSCRIBE_COV_DATA *data)
{
int len = 0; /* length of each encoding */
int apdu_len = 0; /* total length of the apdu, return value */
/* tag 0 - subscriberProcessIdentifier */
len = encode_context_unsigned(apdu, 0, data->subscriberProcessIdentifier);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 1 - monitoredObjectIdentifier */
len =
encode_context_object_id(apdu, 1, data->monitoredObjectIdentifier.type,
data->monitoredObjectIdentifier.instance);
apdu_len += len;
if (apdu) {
apdu += len;
}
/*
If both the 'Issue Confirmed Notifications' and
'Lifetime' parameters are absent, then this shall
indicate a cancellation request.
*/
if (!data->cancellationRequest) {
/* tag 2 - issueConfirmedNotifications */
len =
encode_context_boolean(apdu, 2, data->issueConfirmedNotifications);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 3 - lifetime */
len = encode_context_unsigned(apdu, 3, data->lifetime);
apdu_len += len;
}
return apdu_len;
}
/**
* @brief Encode the SubscribeCOV service request
* @note COV and Unconfirmed COV are the same encodings
* @param apdu Pointer to the buffer for encoding into
* @param apdu_size number of bytes available in the buffer
* @param data Pointer to the service data used for encoding values
* @return number of bytes encoded, or zero if unable to encode or too large
*/
size_t cov_subscribe_service_request_encode(
uint8_t *apdu, size_t apdu_size, BACNET_SUBSCRIBE_COV_DATA *data)
{
size_t apdu_len = 0; /* total length of the apdu, return value */
apdu_len = cov_subscribe_apdu_encode(NULL, data);
if (apdu_len > apdu_size) {
apdu_len = 0;
} else {
apdu_len = cov_subscribe_apdu_encode(apdu, data);
}
return apdu_len;
}
/**
* @brief Encode the COV-service request.
* @note COV and Unconfirmed COV are the same encodings
* @param apdu Pointer to the buffer.
* @param apdu_size number of bytes available in the buffer
* @param invoke_id Invoke ID
* @param data Pointer to the data to store the decoded values.
* @return number of bytes encoded, or zero if unable to encode or too large
*/
int cov_subscribe_encode_apdu(uint8_t *apdu,
unsigned apdu_size,
uint8_t invoke_id,
BACNET_SUBSCRIBE_COV_DATA *data)
{
int len = 0; /* length of each encoding */
int apdu_len = 0; /* total length of the apdu, return value */
if (apdu && (apdu_size > 4)) {
apdu[0] = PDU_TYPE_CONFIRMED_SERVICE_REQUEST;
apdu[1] = encode_max_segs_max_apdu(0, MAX_APDU);
apdu[2] = invoke_id;
apdu[3] = SERVICE_CONFIRMED_SUBSCRIBE_COV;
}
len = 4;
apdu_len += len;
if (apdu) {
apdu += len;
}
len =
cov_subscribe_service_request_encode(apdu, apdu_size - apdu_len, data);
if (len > 0) {
apdu_len += len;
} else {
apdu_len = 0;
}
return apdu_len;
}
/**
* @brief Decode the subscribe-service request only.
*
* SubscribeCOV-Request ::= SEQUENCE {
* subscriberProcessIdentifier [0] Unsigned32,
* monitoredObjectIdentifier [1] BACnetObjectIdentifier,
* issueConfirmedNotifications [2] BOOLEAN OPTIONAL,
* lifetime [3] Unsigned OPTIONAL
* }
*
* @param apdu Pointer to the buffer.
* @param apdu_size number of valid bytes in the buffer.
* @param data Pointer to the data to store the decoded values.
*
* @return Bytes decoded or Zero/BACNET_STATUS_ERROR on error.
*/
int cov_subscribe_decode_service_request(
uint8_t *apdu, unsigned apdu_size, BACNET_SUBSCRIBE_COV_DATA *data)
{
int len = 0; /* return value */
int value_len = 0;
BACNET_UNSIGNED_INTEGER decoded_value = 0;
BACNET_OBJECT_TYPE decoded_type = OBJECT_NONE;
uint32_t decoded_instance = 0;
bool decoded_boolean = false;
/* subscriberProcessIdentifier [0] Unsigned32 */
value_len = bacnet_unsigned_context_decode(
&apdu[len], apdu_size - len, 0, &decoded_value);
if (value_len > 0) {
if (data) {
data->subscriberProcessIdentifier = decoded_value;
}
len += value_len;
} else {
if (data) {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
}
return BACNET_STATUS_ERROR;
}
/* monitoredObjectIdentifier [1] BACnetObjectIdentifier */
value_len = bacnet_object_id_context_decode(
&apdu[len], apdu_size - len, 1, &decoded_type, &decoded_instance);
if (value_len > 0) {
if (data) {
data->monitoredObjectIdentifier.type = decoded_type;
data->monitoredObjectIdentifier.instance = decoded_instance;
}
len += value_len;
} else {
if (data) {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
}
return BACNET_STATUS_ERROR;
}
if ((unsigned)len < apdu_size) {
if (data) {
/* does not indicate a cancellation request */
data->cancellationRequest = false;
}
/* issueConfirmedNotifications [2] BOOLEAN OPTIONAL */
value_len = bacnet_boolean_context_decode(
&apdu[len], apdu_size - len, 2, &decoded_boolean);
if (value_len > 0) {
if (data) {
data->issueConfirmedNotifications = decoded_boolean;
}
len += value_len;
} else if (value_len == 0) {
/* invalid tag */
if (data) {
data->issueConfirmedNotifications = false;
}
} else {
if (data) {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
}
return BACNET_STATUS_ERROR;
}
} else {
/* If both the 'Issue Confirmed Notifications' and
'Lifetime' parameters are absent, then this shall
indicate a cancellation request. */
if (data) {
data->cancellationRequest = true;
}
}
if ((unsigned)len < apdu_size) {
/* lifetime [3] Unsigned OPTIONAL */
value_len = bacnet_unsigned_context_decode(
&apdu[len], apdu_size - len, 3, &decoded_value);
if (value_len > 0) {
if (data) {
data->lifetime = decoded_value;
}
len += value_len;
} else {
if (data) {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
}
return BACNET_STATUS_ERROR;
}
} else {
if (data) {
data->lifetime = 0;
}
}
return len;
}
/*
SubscribeCOVProperty-Request ::= SEQUENCE {
subscriberProcessIdentifier [0] Unsigned32,
monitoredObjectIdentifier [1] BACnetObjectIdentifier,
issueConfirmedNotifications [2] BOOLEAN OPTIONAL,
lifetime [3] Unsigned OPTIONAL,
monitoredPropertyIdentifier [4] BACnetPropertyReference,
covIncrement [5] REAL OPTIONAL
}
BACnetPropertyReference ::= SEQUENCE {
propertyIdentifier [0] BACnetPropertyIdentifier,
propertyArrayIndex [1] Unsigned OPTIONAL
-- used only with array datatype
-- if omitted with an array the entire array is referenced
}
*/
/**
* @brief Encode APDU for SubscribeCOVProperty request
* @param apdu Pointer to the buffer, or NULL for length
* @param data Pointer to the data to encode.
* @return bytes encoded or zero on error.
*/
int cov_subscribe_property_apdu_encode(
uint8_t *apdu, BACNET_SUBSCRIBE_COV_DATA *data)
{
int len = 0; /* length of each encoding */
int apdu_len = 0; /* total length of the apdu, return value */
if (!data) {
return 0;
}
/* tag 0 - subscriberProcessIdentifier */
len = encode_context_unsigned(apdu, 0, data->subscriberProcessIdentifier);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 1 - monitoredObjectIdentifier */
len =
encode_context_object_id(apdu, 1, data->monitoredObjectIdentifier.type,
data->monitoredObjectIdentifier.instance);
apdu_len += len;
if (apdu) {
apdu += len;
}
if (!data->cancellationRequest) {
/* tag 2 - issueConfirmedNotifications */
len =
encode_context_boolean(apdu, 2, data->issueConfirmedNotifications);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 3 - lifetime */
len = encode_context_unsigned(apdu, 3, data->lifetime);
apdu_len += len;
if (apdu) {
apdu += len;
}
}
/* tag 4 - monitoredPropertyIdentifier */
len = encode_opening_tag(apdu, 4);
apdu_len += len;
if (apdu) {
apdu += len;
}
len = encode_context_enumerated(
apdu, 0, data->monitoredProperty.propertyIdentifier);
apdu_len += len;
if (apdu) {
apdu += len;
}
if (data->monitoredProperty.propertyArrayIndex != BACNET_ARRAY_ALL) {
len = encode_context_unsigned(
apdu, 1, data->monitoredProperty.propertyArrayIndex);
apdu_len += len;
if (apdu) {
apdu += len;
}
}
len = encode_closing_tag(apdu, 4);
apdu_len += len;
if (apdu) {
apdu += len;
}
/* tag 5 - covIncrement */
if (data->covIncrementPresent) {
len = encode_context_real(apdu, 5, data->covIncrement);
apdu_len += len;
}
return apdu_len;
}
/**
* @brief Encode the SubscribeCOVProperty service request
* @param apdu Pointer to the buffer for encoding into
* @param apdu_size number of bytes available in the buffer
* @param data Pointer to the service data used for encoding values
* @return number of bytes encoded, or zero if unable to encode or too large
*/
size_t cov_subscribe_property_service_request_encode(
uint8_t *apdu, size_t apdu_size, BACNET_SUBSCRIBE_COV_DATA *data)
{
size_t apdu_len = 0; /* total length of the apdu, return value */
apdu_len = cov_subscribe_property_apdu_encode(NULL, data);
if (apdu_len > apdu_size) {
apdu_len = 0;
} else {
apdu_len = cov_subscribe_property_apdu_encode(apdu, data);
}
return apdu_len;
}
/**
* @brief Encode SubscribeCOVProperty request
* @param apdu Pointer to the buffer.
* @param apdu_size number of bytes available in the buffer
* @param invoke_id Invoke Id.
* @param data Pointer to the data to encode.
* @return number of bytes encoded, or zero on error.
*/
int cov_subscribe_property_encode_apdu(uint8_t *apdu,
unsigned apdu_size,
uint8_t invoke_id,
BACNET_SUBSCRIBE_COV_DATA *data)
{
int len = 0; /* length of each encoding */
int apdu_len = 0; /* total length of the apdu, return value */
if (!data) {
return 0;
}
if (apdu && (apdu_size > 4)) {
apdu[0] = PDU_TYPE_CONFIRMED_SERVICE_REQUEST;
apdu[1] = encode_max_segs_max_apdu(0, MAX_APDU);
apdu[2] = invoke_id;
apdu[3] = SERVICE_CONFIRMED_SUBSCRIBE_COV_PROPERTY;
}
len = 4;
apdu_len += len;
if (apdu) {
apdu += len;
}
len = cov_subscribe_property_service_request_encode(
apdu, apdu_size - apdu_len, data);
if (len > 0) {
apdu_len += len;
} else {
apdu_len = 0;
}
return apdu_len;
}
/**
* Decode the COV-service property request only.
*
* @param apdu Pointer to the buffer.
* @param apdu_len Count of valid bytes in the buffer.
* @param data Pointer to the data to store the decoded values.
*
* @return Bytes decoded or Zero/BACNET_STATUS_ERROR on error.
*/
int cov_subscribe_property_decode_service_request(
uint8_t *apdu, unsigned apdu_len, BACNET_SUBSCRIBE_COV_DATA *data)
{
int len = 0; /* return value */
uint8_t tag_number = 0;
uint32_t len_value = 0;
BACNET_UNSIGNED_INTEGER decoded_value = 0; /* for decoding */
BACNET_OBJECT_TYPE decoded_type = OBJECT_NONE; /* for decoding */
uint32_t property = 0; /* for decoding */
if ((apdu_len > 2) && data) {
/* tag 0 - subscriberProcessIdentifier */
if (decode_is_context_tag(&apdu[len], 0)) {
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
len += decode_unsigned(&apdu[len], len_value, &decoded_value);
data->subscriberProcessIdentifier = decoded_value;
} else {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
return BACNET_STATUS_REJECT;
}
/* tag 1 - monitoredObjectIdentifier */
if (len >= (int)apdu_len) {
return BACNET_STATUS_REJECT;
}
if (decode_is_context_tag(&apdu[len], 1)) {
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
len += decode_object_id(&apdu[len], &decoded_type,
&data->monitoredObjectIdentifier.instance);
data->monitoredObjectIdentifier.type = decoded_type;
} else {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
return BACNET_STATUS_REJECT;
}
/* tag 2 - issueConfirmedNotifications - optional */
if (len >= (int)apdu_len) {
return BACNET_STATUS_REJECT;
}
if (decode_is_context_tag(&apdu[len], 2)) {
data->cancellationRequest = false;
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
data->issueConfirmedNotifications =
decode_context_boolean(&apdu[len]);
len++;
} else {
data->cancellationRequest = true;
}
/* tag 3 - lifetime - optional */
if (len >= (int)apdu_len) {
return BACNET_STATUS_REJECT;
}
if (decode_is_context_tag(&apdu[len], 3)) {
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
len += decode_unsigned(&apdu[len], len_value, &decoded_value);
data->lifetime = decoded_value;
} else {
data->lifetime = 0;
}
/* tag 4 - monitoredPropertyIdentifier */
if (len >= (int)apdu_len) {
return BACNET_STATUS_REJECT;
}
if (!decode_is_opening_tag_number(&apdu[len], 4)) {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
return BACNET_STATUS_REJECT;
}
/* a tag number of 4 is not extended so only one octet */
len++;
/* the propertyIdentifier is tag 0 */
if (len >= (int)apdu_len) {
return BACNET_STATUS_REJECT;
}
if (decode_is_context_tag(&apdu[len], 0)) {
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
len += decode_enumerated(&apdu[len], len_value, &property);
data->monitoredProperty.propertyIdentifier =
(BACNET_PROPERTY_ID)property;
} else {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
return BACNET_STATUS_REJECT;
}
/* the optional array index is tag 1 */
if (len >= (int)apdu_len) {
return BACNET_STATUS_REJECT;
}
if (decode_is_context_tag(&apdu[len], 1)) {
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
len += decode_unsigned(&apdu[len], len_value, &decoded_value);
data->monitoredProperty.propertyArrayIndex = decoded_value;
} else {
data->monitoredProperty.propertyArrayIndex = BACNET_ARRAY_ALL;
}
if (!decode_is_closing_tag_number(&apdu[len], 4)) {
data->error_code = ERROR_CODE_REJECT_INVALID_TAG;
return BACNET_STATUS_REJECT;
}
/* a tag number of 4 is not extended so only one octet */
len++;
/* tag 5 - covIncrement - optional */
if (len < (int)apdu_len) {
if (decode_is_context_tag(&apdu[len], 5)) {
data->covIncrementPresent = true;
len += decode_tag_number_and_value(
&apdu[len], &tag_number, &len_value);
len += decode_real(&apdu[len], &data->covIncrement);
} else {
data->covIncrementPresent = false;
}
} else {
data->covIncrementPresent = false;
}
}
return len;
}
/** Link an array or buffer of BACNET_PROPERTY_VALUE elements and add them
* to the BACNET_COV_DATA structure. It is used prior to encoding or
* decoding the APDU data into the structure.
*
* @param data - The BACNET_COV_DATA structure that holds the data to
* be encoded or decoded.
* @param value_list - One or more BACNET_PROPERTY_VALUE elements in
* a buffer or array.
* @param count - number of BACNET_PROPERTY_VALUE elements
*/
void cov_data_value_list_link(
BACNET_COV_DATA *data, BACNET_PROPERTY_VALUE *value_list, size_t count)
{
BACNET_PROPERTY_VALUE *current_value_list = NULL;
if (data && value_list) {
data->listOfValues = value_list;
while (count) {
if (count > 1) {
current_value_list = value_list;
value_list++;
current_value_list->next = value_list;
} else {
value_list->next = NULL;
}
count--;
}
}
}
/**
* @brief Encode the Value List for REAL Present-Value and Status-Flags
* @param value_list - #BACNET_PROPERTY_VALUE with at least 2 entries
* @param value - REAL present-value
* @param in_alarm - value of in-alarm status-flags
* @param fault - value of fault status-flags
* @param overridden - value of overridden status-flags
* @param out_of_service - value of out-of-service status-flags
*
* @return true if values were encoded
*/
bool cov_value_list_encode_real(BACNET_PROPERTY_VALUE *value_list,
float value,
bool in_alarm,
bool fault,
bool overridden,
bool out_of_service)
{
bool status = false;
if (value_list) {
value_list->propertyIdentifier = PROP_PRESENT_VALUE;
value_list->propertyArrayIndex = BACNET_ARRAY_ALL;
value_list->value.context_specific = false;
value_list->value.tag = BACNET_APPLICATION_TAG_REAL;
value_list->value.type.Real = value;
value_list->value.next = NULL;
value_list->priority = BACNET_NO_PRIORITY;
value_list = value_list->next;
}
if (value_list) {
value_list->propertyIdentifier = PROP_STATUS_FLAGS;
value_list->propertyArrayIndex = BACNET_ARRAY_ALL;
value_list->value.context_specific = false;
value_list->value.tag = BACNET_APPLICATION_TAG_BIT_STRING;
bitstring_init(&value_list->value.type.Bit_String);
bitstring_set_bit(
&value_list->value.type.Bit_String, STATUS_FLAG_IN_ALARM, in_alarm);
bitstring_set_bit(
&value_list->value.type.Bit_String, STATUS_FLAG_FAULT, fault);
bitstring_set_bit(&value_list->value.type.Bit_String,
STATUS_FLAG_OVERRIDDEN, overridden);
bitstring_set_bit(&value_list->value.type.Bit_String,
STATUS_FLAG_OUT_OF_SERVICE, out_of_service);
value_list->value.next = NULL;
value_list->priority = BACNET_NO_PRIORITY;
value_list->next = NULL;
status = true;
}
return status;
}
/**
* @brief Encode the Value List for ENUMERATED Present-Value and Status-Flags
* @param value_list - #BACNET_PROPERTY_VALUE with at least 2 entries
* @param value - ENUMERATED present-value
* @param in_alarm - value of in-alarm status-flags
* @param fault - value of in-alarm status-flags
* @param overridden - value of overridden status-flags
* @param out_of_service - value of out-of-service status-flags
*
* @return true if values were encoded
*/
bool cov_value_list_encode_enumerated(BACNET_PROPERTY_VALUE *value_list,
uint32_t value,
bool in_alarm,
bool fault,
bool overridden,
bool out_of_service)
{
bool status = false;
if (value_list) {
value_list->propertyIdentifier = PROP_PRESENT_VALUE;
value_list->propertyArrayIndex = BACNET_ARRAY_ALL;
value_list->value.context_specific = false;
value_list->value.tag = BACNET_APPLICATION_TAG_ENUMERATED;
value_list->value.type.Enumerated = value;
value_list->value.next = NULL;
value_list->priority = BACNET_NO_PRIORITY;
value_list = value_list->next;
}
if (value_list) {
value_list->propertyIdentifier = PROP_STATUS_FLAGS;
value_list->propertyArrayIndex = BACNET_ARRAY_ALL;
value_list->value.context_specific = false;
value_list->value.tag = BACNET_APPLICATION_TAG_BIT_STRING;
bitstring_init(&value_list->value.type.Bit_String);
bitstring_set_bit(
&value_list->value.type.Bit_String, STATUS_FLAG_IN_ALARM, in_alarm);
bitstring_set_bit(
&value_list->value.type.Bit_String, STATUS_FLAG_FAULT, fault);
bitstring_set_bit(&value_list->value.type.Bit_String,
STATUS_FLAG_OVERRIDDEN, overridden);
bitstring_set_bit(&value_list->value.type.Bit_String,
STATUS_FLAG_OUT_OF_SERVICE, out_of_service);
value_list->value.next = NULL;
value_list->priority = BACNET_NO_PRIORITY;
value_list->next = NULL;
status = true;
}
return status;
}
/**
* @brief Encode the Value List for UNSIGNED INT Present-Value and Status-Flags
* @param value_list - #BACNET_PROPERTY_VALUE with at least 2 entries
* @param value - UNSIGNED INT present-value
* @param in_alarm - value of in-alarm status-flags
* @param fault - value of in-alarm status-flags
* @param overridden - value of overridden status-flags
* @param out_of_service - value of out-of-service status-flags
*
* @return true if values were encoded
*/
bool cov_value_list_encode_unsigned(BACNET_PROPERTY_VALUE *value_list,
uint32_t value,
bool in_alarm,
bool fault,
bool overridden,
bool out_of_service)
{
bool status = false;
if (value_list) {
value_list->propertyIdentifier = PROP_PRESENT_VALUE;
value_list->propertyArrayIndex = BACNET_ARRAY_ALL;
value_list->value.context_specific = false;
value_list->value.tag = BACNET_APPLICATION_TAG_UNSIGNED_INT;
value_list->value.type.Unsigned_Int = value;
value_list->value.next = NULL;
value_list->priority = BACNET_NO_PRIORITY;
value_list = value_list->next;
}
if (value_list) {
value_list->propertyIdentifier = PROP_STATUS_FLAGS;
value_list->propertyArrayIndex = BACNET_ARRAY_ALL;
value_list->value.context_specific = false;
value_list->value.tag = BACNET_APPLICATION_TAG_BIT_STRING;
bitstring_init(&value_list->value.type.Bit_String);
bitstring_set_bit(
&value_list->value.type.Bit_String, STATUS_FLAG_IN_ALARM, in_alarm);
bitstring_set_bit(
&value_list->value.type.Bit_String, STATUS_FLAG_FAULT, fault);
bitstring_set_bit(&value_list->value.type.Bit_String,
STATUS_FLAG_OVERRIDDEN, overridden);
bitstring_set_bit(&value_list->value.type.Bit_String,
STATUS_FLAG_OUT_OF_SERVICE, out_of_service);
value_list->value.next = NULL;
value_list->priority = BACNET_NO_PRIORITY;
value_list->next = NULL;
status = true;
}
return status;
}
#if defined(BACAPP_CHARACTER_STRING)
/**
* @brief Encode the Value List for CHARACTER_STRING Present-Value and
* Status-Flags
* @param value_list - #BACNET_PROPERTY_VALUE with at least 2 entries
* @param value - CHARACTER_STRING present-value
* @param in_alarm - value of in-alarm status-flags
* @param fault - value of in-alarm status-flags
* @param overridden - value of overridden status-flags
* @param out_of_service - value of out-of-service status-flags
*
* @return true if values were encoded
*/
bool cov_value_list_encode_character_string(BACNET_PROPERTY_VALUE *value_list,
BACNET_CHARACTER_STRING *value,
bool in_alarm,
bool fault,
bool overridden,
bool out_of_service)
{
bool status = false;
if (value_list) {
value_list->propertyIdentifier = PROP_PRESENT_VALUE;
value_list->propertyArrayIndex = BACNET_ARRAY_ALL;
value_list->value.context_specific = false;
value_list->value.tag = BACNET_APPLICATION_TAG_CHARACTER_STRING;
characterstring_copy(&value_list->value.type.Character_String, value);
value_list->value.next = NULL;
value_list->priority = BACNET_NO_PRIORITY;
value_list = value_list->next;
}
if (value_list) {
value_list->propertyIdentifier = PROP_STATUS_FLAGS;
value_list->propertyArrayIndex = BACNET_ARRAY_ALL;
value_list->value.context_specific = false;
value_list->value.tag = BACNET_APPLICATION_TAG_BIT_STRING;
bitstring_init(&value_list->value.type.Bit_String);
bitstring_set_bit(
&value_list->value.type.Bit_String, STATUS_FLAG_IN_ALARM, in_alarm);
bitstring_set_bit(
&value_list->value.type.Bit_String, STATUS_FLAG_FAULT, fault);
bitstring_set_bit(&value_list->value.type.Bit_String,
STATUS_FLAG_OVERRIDDEN, overridden);
bitstring_set_bit(&value_list->value.type.Bit_String,
STATUS_FLAG_OUT_OF_SERVICE, out_of_service);
value_list->value.next = NULL;
value_list->priority = BACNET_NO_PRIORITY;
value_list->next = NULL;
status = true;
}
return status;
}
#endif
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