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bacnet_stack/bacnet-stack/demo/writefile/writefile.c
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/**************************************************************************
*
* Copyright (C) 2006 Steve Karg <skarg@users.sourceforge.net>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*********************************************************************/
/* command line tool that sends a BACnet service, and displays the reply */
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h> /* for time */
#include <errno.h>
#include "bactext.h"
#include "iam.h"
#include "awf.h"
#include "tsm.h"
#include "address.h"
#include "config.h"
#include "bacdef.h"
#include "npdu.h"
#include "apdu.h"
#include "device.h"
#include "net.h"
#include "datalink.h"
#include "whois.h"
/* some demo stuff needed */
#include "filename.h"
#include "handlers.h"
#include "txbuf.h"
/* buffer used for receive */
static uint8_t Rx_Buf[MAX_MPDU] = { 0 };
/* global variables used in this file */
static uint32_t Target_File_Object_Instance = 4194303;
static uint32_t Target_Device_Object_Instance = 4194303;
static BACNET_ADDRESS Target_Address;
static char *Local_File_Name = NULL;
static bool End_Of_File_Detected = false;
static bool Error_Detected = false;
static uint8_t Current_Invoke_ID = 0;
static void Atomic_Read_File_Error_Handler(BACNET_ADDRESS * src,
uint8_t invoke_id,
BACNET_ERROR_CLASS error_class, BACNET_ERROR_CODE error_code)
{
/* FIXME: verify src and invoke id */
(void) src;
(void) invoke_id;
printf("\r\nBACnet Error!\r\n");
printf("Error Class: %s\r\n", bactext_error_class_name(error_class));
printf("Error Code: %s\r\n", bactext_error_code_name(error_code));
Error_Detected = true;
}
void MyAbortHandler(BACNET_ADDRESS * src,
uint8_t invoke_id, uint8_t abort_reason)
{
/* FIXME: verify src and invoke id */
(void) src;
(void) invoke_id;
printf("\r\nBACnet Abort!\r\n");
printf("Abort Reason: %s\r\n",
bactext_abort_reason_name(abort_reason));
Error_Detected = true;
}
void MyRejectHandler(BACNET_ADDRESS * src,
uint8_t invoke_id, uint8_t reject_reason)
{
/* FIXME: verify src and invoke id */
(void) src;
(void) invoke_id;
printf("\r\nBACnet Reject!\r\n");
printf("Reject Reason: %s\r\n",
bactext_reject_reason_name(reject_reason));
Error_Detected = true;
}
static uint8_t Send_Atomic_Write_File_Stream(uint32_t device_id,
uint32_t file_instance,
int fileStartPosition, BACNET_OCTET_STRING * fileData)
{
BACNET_ADDRESS dest;
BACNET_ADDRESS my_address;
unsigned max_apdu = 0;
uint8_t invoke_id = 0;
bool status = false;
int pdu_len = 0;
int bytes_sent = 0;
BACNET_ATOMIC_WRITE_FILE_DATA data;
/* is the device bound? */
status = address_get_by_device(device_id, &max_apdu, &dest);
/* is there a tsm available? */
if (status)
status = tsm_transaction_available();
if (status) {
datalink_get_my_address(&my_address);
pdu_len = npdu_encode_apdu(&Handler_Transmit_Buffer[0], &dest, &my_address, true, /* true for confirmed messages */
MESSAGE_PRIORITY_NORMAL);
invoke_id = tsm_next_free_invokeID();
/* load the data for the encoding */
data.object_type = OBJECT_FILE;
data.object_instance = file_instance;
data.access = FILE_STREAM_ACCESS;
data.type.stream.fileStartPosition = fileStartPosition;
status = octetstring_copy(&data.fileData, fileData);
if (status) {
pdu_len += awf_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
invoke_id, &data);
/* will the APDU fit the target device?
note: if there is a bottleneck router in between
us and the destination, we won't know unless
we have a way to check for that and update the
max_apdu in the address binding table. */
if ((unsigned) pdu_len <= max_apdu) {
tsm_set_confirmed_unsegmented_transaction(invoke_id,
&dest, &Handler_Transmit_Buffer[0], pdu_len);
bytes_sent = datalink_send_pdu(&dest, /* destination address */
&Handler_Transmit_Buffer[0], pdu_len); /* number of bytes of data */
if (bytes_sent <= 0)
fprintf(stderr,
"Failed to Send AtomicWriteFile Request (%s)!\n",
strerror(errno));
} else
fprintf(stderr, "Failed to Send AtomicWriteFile Request "
"(payload [%d] exceeds destination maximum APDU [%u])!\n",
pdu_len, max_apdu);
} else
fprintf(stderr, "Failed to Send AtomicWriteFile Request "
"(payload [%d] exceeds octet string capacity)!\n",
pdu_len);
}
return invoke_id;
}
static void Send_WhoIs(uint32_t device_id)
{
int pdu_len = 0;
BACNET_ADDRESS dest;
int bytes_sent = 0;
/* Who-Is is a global broadcast */
datalink_get_broadcast_address(&dest);
/* encode the NPDU portion of the packet */
pdu_len = npdu_encode_apdu(&Handler_Transmit_Buffer[0], &dest, NULL, false, /* true for confirmed messages */
MESSAGE_PRIORITY_NORMAL);
/* encode the APDU portion of the packet */
pdu_len += whois_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
device_id, device_id);
bytes_sent = datalink_send_pdu(&dest, /* destination address */
&Handler_Transmit_Buffer[0], pdu_len); /* number of bytes of data */
if (bytes_sent <= 0)
fprintf(stderr, "Failed to Send Who-Is Request (%s)!\n",
strerror(errno));
}
static void LocalIAmHandler(uint8_t * service_request,
uint16_t service_len, BACNET_ADDRESS * src)
{
int len = 0;
uint32_t device_id = 0;
unsigned max_apdu = 0;
int segmentation = 0;
uint16_t vendor_id = 0;
(void) src;
(void) service_len;
len = iam_decode_service_request(service_request,
&device_id, &max_apdu, &segmentation, &vendor_id);
if (len != -1) {
address_add(device_id, max_apdu, src);
} else
fprintf(stderr, "!\n");
return;
}
static void Init_Service_Handlers(void)
{
/* we need to handle who-is
to support dynamic device binding to us */
apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_WHO_IS,
handler_who_is);
/* handle i-am to support binding to other devices */
apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_I_AM,
LocalIAmHandler);
/* set the handler for all the services we don't implement
It is required to send the proper reject message... */
apdu_set_unrecognized_service_handler_handler
(handler_unrecognized_service);
/* we must implement read property - it's required! */
apdu_set_confirmed_handler(SERVICE_CONFIRMED_READ_PROPERTY,
handler_read_property);
/* handle any errors coming back */
apdu_set_error_handler(SERVICE_CONFIRMED_ATOMIC_READ_FILE,
Atomic_Read_File_Error_Handler);
apdu_set_abort_handler(MyAbortHandler);
apdu_set_reject_handler(MyRejectHandler);
}
int main(int argc, char *argv[])
{
BACNET_ADDRESS src = { 0 }; /* address where message came from */
uint16_t pdu_len = 0;
unsigned timeout = 100; /* milliseconds */
unsigned max_apdu = 0;
time_t elapsed_seconds = 0;
time_t last_seconds = 0;
time_t current_seconds = 0;
time_t timeout_seconds = 0;
int fileStartPosition = 0;
unsigned requestedOctetCount = 0;
uint8_t invoke_id = 0;
bool found = false;
uint16_t my_max_apdu = 0;
FILE *pFile = NULL;
static BACNET_OCTET_STRING fileData;
size_t len = 0;
if (argc < 4) {
/* FIXME: what about access method - record or stream? */
printf("%s device-instance file-instance local-name\r\n",
filename_remove_path(argv[0]));
return 0;
}
/* decode the command line parameters */
Target_Device_Object_Instance = strtol(argv[1], NULL, 0);
Target_File_Object_Instance = strtol(argv[2], NULL, 0);
Local_File_Name = argv[3];
if (Target_Device_Object_Instance >= BACNET_MAX_INSTANCE) {
fprintf(stderr, "device-instance=%u - it must be less than %u\r\n",
Target_Device_Object_Instance, BACNET_MAX_INSTANCE);
return 1;
}
if (Target_File_Object_Instance >= BACNET_MAX_INSTANCE) {
fprintf(stderr, "file-instance=%u - it must be less than %u\r\n",
Target_File_Object_Instance, BACNET_MAX_INSTANCE + 1);
return 1;
}
/* setup my info */
Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
address_init();
Init_Service_Handlers();
/* configure standard BACnet/IP port */
bip_set_interface("eth0"); /* for linux */
bip_set_port(0xBAC0);
if (!bip_init())
return 1;
/* configure the timeout values */
last_seconds = time(NULL);
timeout_seconds = (Device_APDU_Timeout() / 1000) *
Device_Number_Of_APDU_Retries();
/* try to bind with the device */
Send_WhoIs(Target_Device_Object_Instance);
/* loop forever */
for (;;) {
/* increment timer - exit if timed out */
current_seconds = time(NULL);
/* returns 0 bytes on timeout */
pdu_len = bip_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
/* process */
if (pdu_len) {
npdu_handler(&src, &Rx_Buf[0], pdu_len);
}
/* at least one second has passed */
if (current_seconds != last_seconds)
tsm_timer_milliseconds(((current_seconds -
last_seconds) * 1000));
if (End_Of_File_Detected || Error_Detected) {
printf("\r\n");
break;
}
/* wait until the device is bound, or timeout and quit */
found = address_bind_request(Target_Device_Object_Instance,
&max_apdu, &Target_Address);
if (found) {
/* calculate the smaller of our APDU size or theirs
and remove the overhead of the APDU (varies depending on size).
note: we could fail if there is a bottle neck (router)
and smaller MPDU in betweeen. */
if (max_apdu < MAX_APDU)
my_max_apdu = max_apdu;
else
my_max_apdu = MAX_APDU;
/* Typical sizes are 50, 128, 206, 480, 1024, and 1476 octets */
if (my_max_apdu <= 50)
requestedOctetCount = my_max_apdu - 16;
else if (my_max_apdu <= 480)
requestedOctetCount = my_max_apdu - 32;
else if (my_max_apdu <= 1476)
requestedOctetCount = my_max_apdu - 64;
else
requestedOctetCount = my_max_apdu / 2;
/* has the previous invoke id expired or returned?
note: invoke ID = 0 is invalid, so it will be idle */
if ((invoke_id == 0) || tsm_invoke_id_free(invoke_id)) {
if (invoke_id != 0)
fileStartPosition += requestedOctetCount;
/* we'll read the file in chunks
less than max_apdu to keep unsegmented */
pFile = fopen(Local_File_Name, "rb");
if (pFile) {
(void) fseek(pFile, fileStartPosition, SEEK_SET);
len = fread(octetstring_value(&fileData), 1,
requestedOctetCount, pFile);
if (len < requestedOctetCount)
End_Of_File_Detected = true;
octetstring_truncate(&fileData, len);
fclose(pFile);
} else
End_Of_File_Detected = true;
printf("\rSending %d bytes", (fileStartPosition + len));
invoke_id =
Send_Atomic_Write_File_Stream
(Target_Device_Object_Instance,
Target_File_Object_Instance, fileStartPosition,
&fileData);
Current_Invoke_ID = invoke_id;
}
} else {
/* increment timer - exit if timed out */
elapsed_seconds += (current_seconds - last_seconds);
if (elapsed_seconds > timeout_seconds)
break;
}
/* keep track of time for next check */
last_seconds = current_seconds;
}
return 0;
}
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