/** 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; }