/** Send a local Who-Is request for a specific device, a range, or any device.
* If low_limit and high_limit both are -1, then the range is unlimited.
* If low_limit and high_limit have the same non-negative value, then only
* that device will respond.
* Otherwise, low_limit must be less than high_limit.
* @param low_limit [in] Device Instance Low Range, 0 - 4,194,303 or -1
* @param high_limit [in] Device Instance High Range, 0 - 4,194,303 or -1
*/
void Send_WhoIs_Local(
int32_t low_limit,
int32_t high_limit)
{
BACNET_ADDRESS dest;
char temp[6];
int loop;
if (!dcc_communication_enabled())
return;
/* Who-Is is a global broadcast */
datalink_get_broadcast_address(&dest);
/* encode the NPDU portion of the packet */
/* I added this to make it a local broadcast */
dest.net = 0;
/* Not sure why this happens but values are backwards so they need to be reversed */
temp[0] = dest.mac[3];
temp[1] = dest.mac[2];
temp[2] = dest.mac[1];
temp[3] = dest.mac[0];
temp[4] = dest.mac[5];
temp[5] = dest.mac[4];
for (loop = 0; loop < 6; loop++) {
dest.mac[loop] = temp[loop];
}
Send_WhoIs_To_Network(&dest, low_limit, high_limit);
}
/** Send a Who-Is request to a remote network for a specific device, a range,
* or any device.
* @ingroup DMDDB
* If low_limit and high_limit both are -1, then the range is unlimited.
* If low_limit and high_limit have the same non-negative value, then only
* that device will respond.
* Otherwise, low_limit must be less than high_limit.
* @param target_address [in] BACnet address of target router
* @param low_limit [in] Device Instance Low Range, 0 - 4,194,303 or -1
* @param high_limit [in] Device Instance High Range, 0 - 4,194,303 or -1
*/
void Send_WhoIs_Remote(
BACNET_ADDRESS * target_address,
int32_t low_limit,
int32_t high_limit)
{
if (!dcc_communication_enabled())
return;
Send_WhoIs_To_Network(target_address, low_limit, high_limit);
}
/** Send a global Who-Is request for a specific device, a range, or any device.
* If low_limit and high_limit both are -1, then the range is unlimited.
* If low_limit and high_limit have the same non-negative value, then only
* that device will respond.
* Otherwise, low_limit must be less than high_limit.
* @param low_limit [in] Device Instance Low Range, 0 - 4,194,303 or -1
* @param high_limit [in] Device Instance High Range, 0 - 4,194,303 or -1
*/
void Send_WhoIs_Global(
int32_t low_limit,
int32_t high_limit)
{
BACNET_ADDRESS dest;
if (!dcc_communication_enabled())
return;
/* Who-Is is a global broadcast */
datalink_get_broadcast_address(&dest);
Send_WhoIs_To_Network(&dest, low_limit, high_limit);
}
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;
BACNET_ADDRESS dest;
int argi;
/* print help if requested */
for (argi = 1; argi < argc; argi++) {
if (strcmp(argv[argi], "--help") == 0) {
print_help(filename_remove_path(argv[0]));
return 0;
}
}
datalink_get_broadcast_address(&dest);
/* decode the command line parameters */
if (argc >= 2) {
char *s;
long v = strtol(argv[1], &s, 0);
if (*s++ == ':') {
if (argv[1][0] != ':')
dest.net = (uint16_t) v;
dest.mac_len = 0;
if (isdigit(*s))
parse_bac_address(&dest, s);
} else {
Target_Object_Instance_Min = Target_Object_Instance_Max = v;
}
}
if (argc <= 2) {
/* empty */
} else if (argc == 3) {
if (Target_Object_Instance_Min == -1)
Target_Object_Instance_Min = Target_Object_Instance_Max =
strtol(argv[2], NULL, 0);
else
Target_Object_Instance_Max = strtol(argv[2], NULL, 0);
} else if (argc == 4) {
Target_Object_Instance_Min = strtol(argv[2], NULL, 0);
Target_Object_Instance_Max = strtol(argv[3], NULL, 0);
} else {
print_usage(filename_remove_path(argv[0]));
return 1;
}
if (Target_Object_Instance_Min > BACNET_MAX_INSTANCE) {
fprintf(stderr, "device-instance-min=%u - it must be less than %u\r\n",
Target_Object_Instance_Min, BACNET_MAX_INSTANCE + 1);
return 1;
}
if (Target_Object_Instance_Max > BACNET_MAX_INSTANCE) {
fprintf(stderr, "device-instance-max=%u - it must be less than %u\r\n",
Target_Object_Instance_Max, BACNET_MAX_INSTANCE + 1);
return 1;
}
/* 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_WhoIs_To_Network(&dest, Target_Object_Instance_Min,
Target_Object_Instance_Max);
/* 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) {
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;
}
print_address_cache();
return 0;
}