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bacnet-stack/demo/whoisrouter/main.c
Patrick Grimm 01349ec9e8 fork from http://sourceforge.net/projects/bacnet/
2013-03-21 22:53:31 +01:00

329 lines
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/**************************************************************************
*
* Copyright (C) 2008 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 "address.h"
#include "config.h"
#include "bacdef.h"
#include "npdu.h"
#include "apdu.h"
#include "device.h"
#include "datalink.h"
/* some demo stuff needed */
#define DEBUG_ENABLED 0
#include "debug.h"
#include "filename.h"
#include "handlers.h"
#include "client.h"
#include "txbuf.h"
#if defined(BACDL_MSTP)
#include "rs485.h"
#endif
#include "dlenv.h"
/* buffer used for receive */
static uint8_t Rx_Buf[MAX_MPDU] = { 0 };
/* global variables used in this file */
static int32_t Target_Router_Network = 0;
static BACNET_ADDRESS Target_Router_Address;
static bool Error_Detected = false;
static void MyAbortHandler(
BACNET_ADDRESS * src,
uint8_t invoke_id,
uint8_t abort_reason,
bool server)
{
/* FIXME: verify src and invoke id */
(void) src;
(void) invoke_id;
(void) server;
printf("BACnet Abort: %s\r\n", bactext_abort_reason_name(abort_reason));
Error_Detected = true;
}
static 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("BACnet Reject: %s\r\n", bactext_reject_reason_name(reject_reason));
Error_Detected = true;
}
static void My_Router_Handler(
BACNET_ADDRESS * src,
BACNET_NPDU_DATA * npdu_data,
uint8_t * npdu, /* PDU data */
uint16_t npdu_len)
{
uint16_t npdu_offset = 0;
uint16_t dnet = 0;
uint16_t len = 0;
uint16_t j = 0;
switch (npdu_data->network_message_type) {
case NETWORK_MESSAGE_WHO_IS_ROUTER_TO_NETWORK:
break;
case NETWORK_MESSAGE_I_AM_ROUTER_TO_NETWORK:
printf("I-Am Router to Network from ");
for (j = 0; j < MAX_MAC_LEN; j++) {
if (j < src->mac_len) {
printf("%02X", src->mac[j]);
}
}
printf("\nNetworks: ");
while (npdu_len) {
len = decode_unsigned16(&npdu[npdu_offset], &dnet);
printf("%hu", dnet);
npdu_len -= len;
npdu_offset += len;
if (npdu_len) {
printf(", ");
}
}
printf("\n");
break;
case NETWORK_MESSAGE_I_COULD_BE_ROUTER_TO_NETWORK:
case NETWORK_MESSAGE_REJECT_MESSAGE_TO_NETWORK:
case NETWORK_MESSAGE_ROUTER_BUSY_TO_NETWORK:
case NETWORK_MESSAGE_ROUTER_AVAILABLE_TO_NETWORK:
case NETWORK_MESSAGE_INIT_RT_TABLE:
case NETWORK_MESSAGE_INIT_RT_TABLE_ACK:
case NETWORK_MESSAGE_ESTABLISH_CONNECTION_TO_NETWORK:
case NETWORK_MESSAGE_DISCONNECT_CONNECTION_TO_NETWORK:
default:
break;
}
}
void My_NPDU_Handler(
BACNET_ADDRESS * src, /* source address */
uint8_t * pdu, /* PDU data */
uint16_t pdu_len)
{ /* length PDU */
int apdu_offset = 0;
BACNET_ADDRESS dest = { 0 };
BACNET_NPDU_DATA npdu_data = { 0 };
apdu_offset = npdu_decode(&pdu[0], &dest, src, &npdu_data);
if (npdu_data.network_layer_message) {
My_Router_Handler(src, &npdu_data, &pdu[apdu_offset],
(uint16_t) (pdu_len - apdu_offset));
} else if ((apdu_offset > 0) && (apdu_offset <= pdu_len)) {
if ((npdu_data.protocol_version == BACNET_PROTOCOL_VERSION) &&
((dest.net == 0) || (dest.net == BACNET_BROADCAST_NETWORK))) {
/* only handle the version that we know how to handle */
/* and we are not a router, so ignore messages with
routing information cause they are not for us */
apdu_handler(src, &pdu[apdu_offset],
(uint16_t) (pdu_len - apdu_offset));
} else {
if (dest.net) {
debug_printf("NPDU: DNET=%d. Discarded!\n", dest.net);
} else {
debug_printf("NPDU: BACnet Protocol Version=%d. Discarded!\n",
npdu_data.protocol_version);
}
}
}
return;
}
static void Init_Service_Handlers(
void)
{
Device_Init(NULL);
/* we need to handle who-is
to support dynamic device binding to us */
apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_WHO_IS, handler_who_is);
/* 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 the reply (request) coming back */
apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_I_AM, handler_i_am_add);
/* handle any errors coming back */
apdu_set_abort_handler(MyAbortHandler);
apdu_set_reject_handler(MyRejectHandler);
}
static void address_parse(
BACNET_ADDRESS * dst,
int argc,
char *argv[])
{
int dnet = 0;
unsigned mac[6];
int count = 0;
int index = 0;
if (argc > 0) {
count =
sscanf(argv[0], "%x:%x:%x:%x:%x:%x", &mac[0], &mac[1], &mac[2],
&mac[3], &mac[4], &mac[5]);
dst->mac_len = count;
for (index = 0; index < MAX_MAC_LEN; index++) {
if (index < count) {
dst->mac[index] = mac[index];
} else {
dst->mac[index] = 0;
}
}
}
if (argc > 1) {
count = sscanf(argv[1], "%d", &dnet);
dst->net = dnet;
}
if (dnet) {
if (argc > 2) {
count =
sscanf(argv[2], "%x:%x:%x:%x:%x:%x", &mac[0], &mac[1], &mac[2],
&mac[3], &mac[4], &mac[5]);
dst->len = count;
for (index = 0; index < MAX_MAC_LEN; index++) {
if (index < count) {
dst->adr[index] = mac[index];
} else {
dst->adr[index] = 0;
}
}
} else {
fprintf(stderr, "A non-zero DNET requires a DADR.\r\n");
}
} else {
dst->len = 0;
for (index = 0; index < MAX_MAC_LEN; index++) {
dst->adr[index] = 0;
}
}
}
int main(
int argc,
char *argv[])
{
BACNET_ADDRESS src = {
0
}; /* address where message came from */
uint16_t pdu_len = 0;
unsigned timeout = 100; /* milliseconds */
time_t total_seconds = 0;
time_t elapsed_seconds = 0;
time_t last_seconds = 0;
time_t current_seconds = 0;
time_t timeout_seconds = 0;
if (argc < 2) {
printf("Usage: %s DNET [MAC]\r\n", filename_remove_path(argv[0]));
return 0;
}
if ((argc > 1) && (strcmp(argv[1], "--help") == 0)) {
printf("Send BACnet Who-Is-Router-To-Network message to a network.\r\n"
"\r\n" "DNET:\r\n" "BACnet destination network number 0-65535\r\n"
"To omit the BACnet destination network number, use -1.\r\n"
"MAC:\r\n" "Optional MAC address of router for unicast message\r\n"
"Format: xx[:xx:xx:xx:xx:xx] [dnet xx[:xx:xx:xx:xx:xx]]\r\n"
"Use hexidecimal MAC addresses.\r\n" "\r\n"
"To send a Who-Is-Router-To-Network request to DNET 86:\r\n"
"%s 86\r\n"
"To send a Who-Is-Router-To-Network request to all devices:\r\n"
"%s -1\r\n", filename_remove_path(argv[0]),
filename_remove_path(argv[0]));
return 0;
}
/* decode the command line parameters */
if (argc > 1) {
Target_Router_Network = strtol(argv[1], NULL, 0);
if (Target_Router_Network > 65535) {
fprintf(stderr, "DNET=%u - it must be 0 to 65535\r\n",
Target_Router_Network);
return 1;
}
}
if (argc > 2) {
address_parse(&Target_Router_Address, argc - 2, &argv[2]);
} else {
datalink_get_broadcast_address(&Target_Router_Address);
}
/* setup my info */
Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
Init_Service_Handlers();
address_init();
dlenv_init();
atexit(datalink_cleanup);
/* configure the timeout values */
last_seconds = time(NULL);
timeout_seconds = apdu_timeout() / 1000;
/* send the request */
Send_Who_Is_Router_To_Network(&Target_Router_Address,
Target_Router_Network);
/* loop forever */
for (;;) {
/* increment timer - exit if timed out */
current_seconds = time(NULL);
/* returns 0 bytes on timeout */
pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
/* process */
if (pdu_len) {
My_NPDU_Handler(&src, &Rx_Buf[0], pdu_len);
}
if (Error_Detected)
break;
/* increment timer - exit if timed out */
elapsed_seconds = current_seconds - last_seconds;
if (elapsed_seconds) {
#if defined(BACDL_BIP) && BBMD_ENABLED
bvlc_maintenance_timer(elapsed_seconds);
#endif
}
total_seconds += elapsed_seconds;
if (total_seconds > timeout_seconds)
break;
/* keep track of time for next check */
last_seconds = current_seconds;
}
return 0;
}
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