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Secured BACnetTimeValue codec, and improved unit test coverage. (#648)

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* Secured BACnetTimeValue codec, and improved unit test coverage.
This commit is contained in:
Steve Karg
2024-05-20 12:06:28 -05:00
committed by GitHub
parent 53fd7a2e1f
commit 4cd5e2be97
6 changed files with 202 additions and 145 deletions
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src/bacnet/bactimevalue.c
+54 -90
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@@ -1,37 +1,11 @@
/*####COPYRIGHTBEGIN####
-------------------------------------------
Copyright (C) 2015 Nikola Jelic
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####*/
/**
* @file
* @brief BACnetTimeValue complex data type encode and decode
* @author Nikola Jelic <nikola.jelic@euroicc.com>
* @author Steve Karg <skarg@users.sourceforge.net>
* @date 2015
* @copyright SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0
*/
#include <stdbool.h>
#include <stdint.h>
#include <string.h> /* memcpy */
@@ -95,24 +69,18 @@ int bacnet_time_value_encode(uint8_t *apdu, BACNET_TIME_VALUE *value)
{
int len;
int apdu_len = 0;
uint8_t *apdu_offset = NULL;
BACNET_APPLICATION_DATA_VALUE adv;
BACNET_APPLICATION_DATA_VALUE data;
if (!value || !is_data_value_schedule_compatible(value->Value.tag)) {
return BACNET_STATUS_ERROR;
}
if (apdu) {
apdu_offset = &apdu[apdu_len];
}
len = encode_application_time(apdu_offset, &value->Time);
len = encode_application_time(apdu, &value->Time);
apdu_len += len;
if (apdu) {
apdu_offset = &apdu[apdu_len];
apdu += len;
}
bacnet_primitive_to_application_data_value(&adv, &value->Value);
len = bacapp_encode_application_data(apdu_offset, &adv);
bacnet_primitive_to_application_data_value(&data, &value->Value);
len = bacapp_encode_application_data(apdu, &data);
apdu_len += len;
return apdu_len;
@@ -136,24 +104,18 @@ int bacnet_time_value_context_encode(
{
int len;
int apdu_len = 0;
uint8_t *apdu_offset = NULL;
if (apdu) {
apdu_offset = &apdu[apdu_len];
}
len = encode_opening_tag(apdu_offset, tag_number);
len = encode_opening_tag(apdu, tag_number);
apdu_len += len;
if (apdu) {
apdu_offset = &apdu[apdu_len];
apdu += len;
}
len = bacnet_time_value_encode(apdu_offset, value);
len = bacnet_time_value_encode(apdu, value);
apdu_len += len;
if (apdu) {
apdu_offset = &apdu[apdu_len];
apdu += len;
}
len = encode_closing_tag(apdu_offset, tag_number);
len = encode_closing_tag(apdu, tag_number);
apdu_len += len;
return apdu_len;
@@ -182,6 +144,7 @@ int bacnet_application_to_primitive_data_value(
memset(dest, 0, sizeof(struct BACnet_Primitive_Data_Value));
dest->tag = src->tag;
memcpy(&dest->type, &src->type, sizeof(dest->type));
return BACNET_STATUS_OK;
}
@@ -202,6 +165,7 @@ int bacnet_primitive_to_application_data_value(
memset(dest, 0, sizeof(struct BACnet_Application_Data_Value));
dest->tag = src->tag;
memcpy(&dest->type, &src->type, sizeof(src->type));
return BACNET_STATUS_OK;
}
@@ -209,26 +173,26 @@ int bacnet_primitive_to_application_data_value(
* @brief decode a BACnetTimeValue
*
* @param apdu - buffer of data to be decoded
* @param max_apdu_len - number of bytes in the buffer
* @param apdu_size - number of bytes in the buffer
* @param value - stores the decoded property value
* @return number of bytes decoded, or BACNET_STATUS_ERROR if errors occur
*/
int bacnet_time_value_decode(
uint8_t *apdu, int max_apdu_len, BACNET_TIME_VALUE *value)
uint8_t *apdu, int apdu_size, BACNET_TIME_VALUE *value)
{
int len;
int apdu_len = 0;
BACNET_APPLICATION_DATA_VALUE full_data_value = { 0 };
len = bacnet_time_application_decode(
&apdu[apdu_len], max_apdu_len, &value->Time);
&apdu[apdu_len], apdu_size, &value->Time);
if (len <= 0) {
return BACNET_STATUS_ERROR;
}
apdu_len += len;
len = bacapp_decode_application_data(
&apdu[apdu_len], max_apdu_len - apdu_len, &full_data_value);
&apdu[apdu_len], apdu_size - apdu_len, &full_data_value);
if (len <= 0) {
return -1;
}
@@ -250,34 +214,32 @@ int bacapp_decode_time_value(uint8_t *apdu, BACNET_TIME_VALUE *value)
/**
* @brief decode a context encoded BACnetTimeValue
* @param apdu - buffer of data to be decoded
* @param max_apdu_len - number of bytes in the buffer
* @param apdu_size - number of bytes in the buffer
* @param tag_number - context tag number to match
* @param value - stores the decoded property value
* @return number of bytes decoded, or BACNET_STATUS_ERROR if an error occurs
*/
int bacnet_time_value_context_decode(uint8_t *apdu,
int max_apdu_len,
uint8_t tag_number,
BACNET_TIME_VALUE *value)
int bacnet_time_value_context_decode(
uint8_t *apdu, int apdu_size, uint8_t tag_number, BACNET_TIME_VALUE *value)
{
int len;
int apdu_len = 0;
if (bacnet_is_opening_tag_number(
&apdu[apdu_len], max_apdu_len - apdu_len, tag_number, &len)) {
&apdu[apdu_len], apdu_size - apdu_len, tag_number, &len)) {
apdu_len += len;
} else {
return BACNET_STATUS_ERROR;
}
len = bacnet_time_value_decode(
&apdu[apdu_len], max_apdu_len - apdu_len, value);
len =
bacnet_time_value_decode(&apdu[apdu_len], apdu_size - apdu_len, value);
if (len > 0) {
apdu_len += len;
} else {
return BACNET_STATUS_ERROR;
}
if (bacnet_is_closing_tag_number(
&apdu[apdu_len], max_apdu_len - apdu_len, tag_number, &len)) {
&apdu[apdu_len], apdu_size - apdu_len, tag_number, &len)) {
apdu_len += len;
} else {
return BACNET_STATUS_ERROR;
@@ -295,14 +257,15 @@ int bacapp_decode_context_time_value(
/**
* @brief decode a context encoded list of BACnetTimeValue
* @param apdu - buffer of data to be decoded
* @param max_apdu_len - number of bytes in the buffer
* @param apdu_size - number of bytes in the buffer
* @param tag_number - context tag number to match
* @param time_values - stores the decoded property values
* @param max_time_values - number of values to be able to store
* @return number of bytes decoded, or BACNET_STATUS_ERROR if an error occurs
*/
int bacnet_time_values_context_decode(uint8_t *apdu,
const int max_apdu_len,
int bacnet_time_values_context_decode(
uint8_t *apdu,
const int apdu_size,
const uint8_t tag_number,
BACNET_TIME_VALUE *time_values,
const unsigned int max_time_values,
@@ -316,16 +279,17 @@ int bacnet_time_values_context_decode(uint8_t *apdu,
/* day-schedule [0] SEQUENCE OF BACnetTimeValue */
if (bacnet_is_opening_tag_number(
&apdu[apdu_len], max_apdu_len - apdu_len, tag_number, &len)) {
&apdu[apdu_len], apdu_size - apdu_len, tag_number, &len)) {
apdu_len += len;
while (!bacnet_is_closing_tag_number(
&apdu[apdu_len], max_apdu_len - apdu_len, tag_number, &len)) {
&apdu[apdu_len], apdu_size - apdu_len, tag_number, &len)) {
if (count_values < max_time_values) {
len = bacnet_time_value_decode(&apdu[apdu_len],
max_apdu_len - apdu_len, &time_values[count_values++]);
len = bacnet_time_value_decode(
&apdu[apdu_len], apdu_size - apdu_len,
&time_values[count_values++]);
} else {
len = bacnet_time_value_decode(
&apdu[apdu_len], max_apdu_len - apdu_len, &dummy);
&apdu[apdu_len], apdu_size - apdu_len, &dummy);
}
if (len < 0) {
return BACNET_STATUS_ERROR;
@@ -365,7 +329,8 @@ int bacnet_time_values_context_decode(uint8_t *apdu,
* @param value - value to be encoded
* @return the number of apdu bytes encoded, or BACNET_STATUS_ERROR
*/
int bacnet_time_values_context_encode(uint8_t *apdu,
int bacnet_time_values_context_encode(
uint8_t *apdu,
uint8_t tag_number,
BACNET_TIME_VALUE *time_values,
unsigned int max_time_values)
@@ -374,31 +339,30 @@ int bacnet_time_values_context_encode(uint8_t *apdu,
int apdu_len = 0;
int len = 0;
BACNET_TIME t0 = { 0 };
uint8_t *apdu_offset = NULL;
/* day-schedule [x] SEQUENCE OF BACnetTimeValue */
len = encode_opening_tag(apdu, tag_number);
apdu_len += len;
if (apdu) {
apdu_offset = &apdu[apdu_len];
apdu += len;
}
apdu_len += encode_opening_tag(apdu_offset, tag_number);
for (j = 0; j < max_time_values; j++)
for (j = 0; j < max_time_values; j++) {
/* Encode only non-null values (NULL,00:00:00.00) */
if (time_values[j].Value.tag != BACNET_APPLICATION_TAG_NULL ||
datetime_compare_time(&t0, &time_values[j].Time) != 0) {
if (apdu) {
apdu_offset = &apdu[apdu_len];
}
len = bacnet_time_value_encode(apdu_offset, &time_values[j]);
len = bacnet_time_value_encode(apdu, &time_values[j]);
if (len < 0) {
return BACNET_STATUS_ERROR;
}
apdu_len += len;
if (apdu) {
apdu += len;
}
}
/* close tag */
if (apdu) {
apdu_offset = &apdu[apdu_len];
}
apdu_len += encode_closing_tag(apdu_offset, tag_number);
/* close tag */
len = encode_closing_tag(apdu, tag_number);
apdu_len += len;
return apdu_len;
}