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created AtomicReadFile encode and decode functions and unit tests.

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This commit is contained in:
skarg
2005-06-04 22:48:09 +00:00
parent 6078373f12
commit a699d3bb0c
3 changed files with 420 additions and 0 deletions
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bacnet-stack/arf.c
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/*####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 <stdint.h>
#include "bacenum.h"
#include "bacdcode.h"
#include "bacdef.h"
#include "device.h"
#include "arf.h"
// Atomic Read File
// encode service
int arf_encode_apdu(
uint8_t *apdu,
uint8_t invoke_id,
BACNET_ATOMIC_READ_FILE_DATA *data)
{
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_ATOMIC_READ_FILE; // 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->access);
apdu_len += encode_opening_tag(&apdu[apdu_len], 2);
switch (data->access)
{
case FILE_STREAM_ACCESS:
apdu_len += encode_tagged_signed(&apdu[apdu_len],
data->type.stream.fileStartPosition);
apdu_len += encode_tagged_unsigned(&apdu[apdu_len],
data->type.stream.requestedOctetCount);
break;
case FILE_RECORD_ACCESS:
apdu_len += encode_tagged_signed(&apdu[apdu_len],
data->type.record.fileStartRecord);
apdu_len += encode_tagged_unsigned(&apdu[apdu_len],
data->type.record.requestedRecordCount);
break;
default:
break;
}
apdu_len += encode_closing_tag(&apdu[apdu_len], 2);
}
return apdu_len;
}
// decode the service request only
int arf_decode_service_request(
uint8_t *apdu,
unsigned apdu_len,
BACNET_ATOMIC_READ_FILE_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 access = 0; // for decoding
// 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: Access
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, &access);
data->access = access;
// Tag 2: Opening Context Tag
if (!decode_is_opening_tag_number(&apdu[len], 2))
return -1;
// a tag number of 2 is not extended so only one octet
len++;
if (access == FILE_STREAM_ACCESS)
{
// fileStartPosition
tag_len = decode_tag_number_and_value(&apdu[len],
&tag_number, &len_value_type);
len += tag_len;
if (tag_number != BACNET_APPLICATION_TAG_SIGNED_INT)
return -1;
len += decode_signed(&apdu[len],
len_value_type,
&data->type.stream.fileStartPosition);
// requestedOctetCount
tag_len = decode_tag_number_and_value(&apdu[len],
&tag_number, &len_value_type);
len += tag_len;
if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT)
return -1;
len += decode_unsigned(&apdu[len],
len_value_type,
&data->type.stream.requestedOctetCount);
}
else if (access == FILE_RECORD_ACCESS)
{
// fileStartRecord
tag_len = decode_tag_number_and_value(&apdu[len],
&tag_number, &len_value_type);
len += tag_len;
if (tag_number != BACNET_APPLICATION_TAG_SIGNED_INT)
return -1;
len += decode_signed(&apdu[len],
len_value_type,
&data->type.record.fileStartRecord);
// requestedRecordCount
tag_len = decode_tag_number_and_value(&apdu[len],
&tag_number, &len_value_type);
len += tag_len;
if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT)
return -1;
len += decode_unsigned(&apdu[len],
len_value_type,
&data->type.record.requestedRecordCount);
}
else
return -1;
if (!decode_is_closing_tag_number(&apdu[len], 2))
return -1;
// a tag number of 2 is not extended so only one octet
len++;
}
return len;
}
int arf_decode_apdu(
uint8_t *apdu,
unsigned apdu_len,
uint8_t *invoke_id,
BACNET_ATOMIC_READ_FILE_DATA *data)
{
int len = 0;
unsigned 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_ATOMIC_READ_FILE)
return -1;
offset = 4;
if (apdu_len > offset)
{
len = arf_decode_service_request(
&apdu[offset],
apdu_len - offset,
data);
}
return len;
}
#ifdef TEST
#include <assert.h>
#include <string.h>
#include "ctest.h"
void testAtomicReadFileAccess(Test * pTest,
BACNET_ATOMIC_READ_FILE_DATA *data)
{
BACNET_ATOMIC_READ_FILE_DATA test_data = {0};
uint8_t apdu[480] = {0};
int len = 0;
int apdu_len = 0;
uint8_t invoke_id = 128;
uint8_t test_invoke_id = 0;
len = arf_encode_apdu(
&apdu[0],
invoke_id,
data);
ct_test(pTest, len != 0);
apdu_len = len;
len = arf_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.access == data->access);
if (test_data.access == FILE_STREAM_ACCESS)
{
ct_test(pTest, test_data.type.stream.fileStartPosition ==
data->type.stream.fileStartPosition);
ct_test(pTest, test_data.type.stream.requestedOctetCount ==
data->type.stream.requestedOctetCount);
}
else if (test_data.access == FILE_RECORD_ACCESS)
{
ct_test(pTest, test_data.type.record.fileStartRecord ==
data->type.record.fileStartRecord);
ct_test(pTest, test_data.type.record.requestedRecordCount ==
data->type.record.requestedRecordCount);
}
}
void testAtomicReadFile(Test * pTest)
{
BACNET_ATOMIC_READ_FILE_DATA data = {0};
data.object_type = OBJECT_FILE;
data.object_instance = 1;
data.access = FILE_STREAM_ACCESS;
data.type.stream.fileStartPosition = 0;
data.type.stream.requestedOctetCount = 128;
testAtomicReadFileAccess(pTest, &data);
data.object_type = OBJECT_FILE;
data.object_instance = 2;
data.access = FILE_RECORD_ACCESS;
data.type.record.fileStartRecord = 1;
data.type.record.requestedRecordCount = 2;
testAtomicReadFileAccess(pTest, &data);
return;
}
#ifdef TEST_ATOMIC_READ_FILE
uint16_t Device_Max_APDU_Length_Accepted(void)
{
return MAX_APDU;
}
int main(void)
{
Test *pTest;
bool rc;
pTest = ct_create("BACnet AtomicReadFile", NULL);
/* individual tests */
rc = ct_addTestFunction(pTest, testAtomicReadFile);
assert(rc);
ct_setStream(pTest, stdout);
ct_run(pTest);
(void) ct_report(pTest);
ct_destroy(pTest);
return 0;
}
#endif /* TEST_xxx */
#endif /* TEST */
bacnet-stack/arf.h
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/*####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####*/
#ifndef ATOMIC_READ_FILE_H
#define ATOMIC_READ_FILE_H
#include <stdint.h>
#include <stdbool.h>
#include "bacdcode.h"
typedef struct BACnet_Atomic_Read_File_Data
{
BACNET_OBJECT_TYPE object_type;
uint32_t object_instance;
BACNET_FILE_ACCESS_METHOD access;
union
{
struct
{
int fileStartPosition;
unsigned requestedOctetCount;
} stream;
struct
{
int fileStartRecord;
unsigned requestedRecordCount;
} record;
} type;
// note: set the file data to an empty buffer
// and set the DataLength to the size of the empty buffer
// before decoding the data.
uint8_t *fileData;
unsigned fileDataLength;
} BACNET_ATOMIC_READ_FILE_DATA;
// encode service
int arf_encode_apdu(
uint8_t *apdu,
uint8_t invoke_id,
BACNET_ATOMIC_READ_FILE_DATA *data);
// decode the service request only
int arf_decode_service_request(
uint8_t *apdu,
unsigned apdu_len,
BACNET_ATOMIC_READ_FILE_DATA *data);
int arf_decode_apdu(
uint8_t *apdu,
unsigned apdu_len,
uint8_t *invoke_id,
BACNET_ATOMIC_READ_FILE_DATA *data);
#ifdef TEST
#include "ctest.h"
void test_AtomicReadFile(Test * pTest);
void test_AtomicReadFileAck(Test * pTest);
#endif
#endif
bacnet-stack/arf.mak
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#Makefile to build test case
CC = gcc
BASEDIR = .
#CFLAGS = -Wall -I.
# -g for debugging with gdb
#CFLAGS = -Wall -I. -g
CFLAGS = -Wall -I. -Itest -DTEST -DTEST_ATOMIC_READ_FILE -DBACDL_BIP=1 -g
SRCS = bacdcode.c \
bigend.c \
arf.c \
test/ctest.c
OBJS = ${SRCS:.c=.o}
TARGET = atomicreadfile
all: ${TARGET}
${TARGET}: ${OBJS}
${CC} -o $@ ${OBJS}
.c.o:
${CC} -c ${CFLAGS} $*.c -o $@
depend:
rm -f .depend
${CC} -MM ${CFLAGS} *.c >> .depend
clean:
rm -rf core ${TARGET} $(OBJS) *.bak *.1 *.ini
include: .depend