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dump1090.h
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// Part of dump1090, a Mode S message decoder for RTLSDR devices.
//
// dump1090.h: main program header
//
// Copyright (c) 2014-2016 Oliver Jowett <[email protected]>
//
// This file is free software: you may copy, redistribute 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 file 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, see <http://www.gnu.org/licenses/>.
// This file incorporates work covered by the following copyright and
// permission notice:
//
// Copyright (C) 2012 by Salvatore Sanfilippo <[email protected]>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef __DUMP1090_H
#define __DUMP1090_H
// Default version number, if not overriden by the Makefile
#ifndef MODES_DUMP1090_VERSION
# define MODES_DUMP1090_VERSION "unknown"
#endif
#ifndef MODES_DUMP1090_VARIANT
# define MODES_DUMP1090_VARIANT "dump1090-unknown"
#endif
// ============================= Include files ==========================
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdatomic.h>
#include <pthread.h>
#include <stdint.h>
#include <errno.h>
#include <unistd.h>
#include <math.h>
#include <sys/time.h>
#include <signal.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <time.h>
#include <limits.h>
#include "compat/compat.h"
// ============================= #defines ===============================
#define MODES_DEFAULT_FREQ 1090000000
#define MODES_DEFAULT_WIDTH 1000
#define MODES_DEFAULT_HEIGHT 700
#define MODES_RTL_BUFFERS 15 // Number of RTL buffers
#define MODES_RTL_BUF_SIZE (16*16384) // 256k
#define MODES_MAG_BUF_SAMPLES (MODES_RTL_BUF_SIZE / 2) // Each sample is 2 bytes
#define MODES_MAG_BUFFERS 12 // Number of magnitude buffers (should be smaller than RTL_BUFFERS for flowcontrol to work)
#define MODES_AUTO_GAIN -100 // Use automatic gain
#define MODES_MAX_GAIN 999999 // Use max available gain
#define MODES_MSG_SQUELCH_DB 4.0 // Minimum SNR, in dB
#define MODES_MSG_ENCODER_ERRS 3 // Maximum number of encoding errors
#define MODEAC_MSG_SAMPLES (25 * 2) // include up to the SPI bit
#define MODEAC_MSG_BYTES 2
#define MODEAC_MSG_SQUELCH_LEVEL 0x07FF // Average signal strength limit
#define MODES_PREAMBLE_US 8 // microseconds = bits
#define MODES_PREAMBLE_SAMPLES (MODES_PREAMBLE_US * 2)
#define MODES_PREAMBLE_SIZE (MODES_PREAMBLE_SAMPLES * sizeof(uint16_t))
#define MODES_LONG_MSG_BYTES 14
#define MODES_SHORT_MSG_BYTES 7
#define MODES_LONG_MSG_BITS (MODES_LONG_MSG_BYTES * 8)
#define MODES_SHORT_MSG_BITS (MODES_SHORT_MSG_BYTES * 8)
#define MODES_LONG_MSG_SAMPLES (MODES_LONG_MSG_BITS * 2)
#define MODES_SHORT_MSG_SAMPLES (MODES_SHORT_MSG_BITS * 2)
#define MODES_LONG_MSG_SIZE (MODES_LONG_MSG_SAMPLES * sizeof(uint16_t))
#define MODES_SHORT_MSG_SIZE (MODES_SHORT_MSG_SAMPLES * sizeof(uint16_t))
#define MODES_OS_PREAMBLE_SAMPLES (20)
#define MODES_OS_PREAMBLE_SIZE (MODES_OS_PREAMBLE_SAMPLES * sizeof(uint16_t))
#define MODES_OS_LONG_MSG_SAMPLES (268)
#define MODES_OS_SHORT_MSG_SAMPLES (135)
#define MODES_OS_LONG_MSG_SIZE (MODES_LONG_MSG_SAMPLES * sizeof(uint16_t))
#define MODES_OS_SHORT_MSG_SIZE (MODES_SHORT_MSG_SAMPLES * sizeof(uint16_t))
#define MODES_OUT_BUF_SIZE (1500)
#define MODES_OUT_FLUSH_SIZE (MODES_OUT_BUF_SIZE - 256)
#define MODES_OUT_FLUSH_INTERVAL (60000)
#define MODES_USER_LATLON_VALID (1<<0)
#define INVALID_ALTITUDE (-9999)
/* Where did a bit of data arrive from? In order of increasing priority */
typedef enum {
SOURCE_INVALID, /* data is not valid */
SOURCE_MODE_AC, /* A/C message */
SOURCE_MLAT, /* derived from mlat */
SOURCE_MODE_S, /* data from a Mode S message, no full CRC */
SOURCE_MODE_S_CHECKED, /* data from a Mode S message with full CRC */
SOURCE_TISB, /* data from a TIS-B extended squitter message */
SOURCE_ADSR, /* data from a ADS-R extended squitter message */
SOURCE_ADSB, /* data from a ADS-B extended squitter message */
} datasource_t;
/* What sort of address is this and who sent it?
* (Earlier values are higher priority)
*/
typedef enum {
ADDR_ADSB_ICAO, /* Mode S or ADS-B, ICAO address, transponder sourced */
ADDR_ADSB_ICAO_NT, /* ADS-B, ICAO address, non-transponder */
ADDR_ADSR_ICAO, /* ADS-R, ICAO address */
ADDR_TISB_ICAO, /* TIS-B, ICAO address */
ADDR_ADSB_OTHER, /* ADS-B, other address format */
ADDR_ADSR_OTHER, /* ADS-R, other address format */
ADDR_TISB_TRACKFILE, /* TIS-B, Mode A code + track file number */
ADDR_TISB_OTHER, /* TIS-B, other address format */
ADDR_MODE_A, /* Mode A */
ADDR_UNKNOWN /* unknown address format */
} addrtype_t;
typedef enum {
UNIT_FEET,
UNIT_METERS
} altitude_unit_t;
typedef enum {
ALTITUDE_BARO,
ALTITUDE_GEOM
} altitude_source_t;
typedef enum {
AG_INVALID,
AG_GROUND,
AG_AIRBORNE,
AG_UNCERTAIN
} airground_t;
typedef enum {
SIL_INVALID, SIL_UNKNOWN, SIL_PER_SAMPLE, SIL_PER_HOUR
} sil_type_t;
typedef enum {
CPR_SURFACE, CPR_AIRBORNE, CPR_COARSE
} cpr_type_t;
typedef enum {
HEADING_INVALID, // Not set
HEADING_GROUND_TRACK, // Direction of track over ground, degrees clockwise from true north
HEADING_TRUE, // Heading, degrees clockwise from true north
HEADING_MAGNETIC, // Heading, degrees clockwise from magnetic north
HEADING_MAGNETIC_OR_TRUE, // HEADING_MAGNETIC or HEADING_TRUE depending on the HRD bit in opstatus
HEADING_TRACK_OR_HEADING // GROUND_TRACK / MAGNETIC / TRUE depending on the TAH bit in opstatus
} heading_type_t;
typedef enum {
COMMB_UNKNOWN,
COMMB_AMBIGUOUS,
COMMB_EMPTY_RESPONSE,
COMMB_DATALINK_CAPS,
COMMB_GICB_CAPS,
COMMB_AIRCRAFT_IDENT,
COMMB_ACAS_RA,
COMMB_VERTICAL_INTENT,
COMMB_TRACK_TURN,
COMMB_HEADING_SPEED
} commb_format_t;
typedef enum {
NAV_MODE_AUTOPILOT = 1,
NAV_MODE_VNAV = 2,
NAV_MODE_ALT_HOLD = 4,
NAV_MODE_APPROACH = 8,
NAV_MODE_LNAV = 16,
NAV_MODE_TCAS = 32
} nav_modes_t;
// Matches encoding of the ES type 28/1 emergency/priority status subfield
typedef enum {
EMERGENCY_NONE = 0,
EMERGENCY_GENERAL = 1,
EMERGENCY_LIFEGUARD = 2,
EMERGENCY_MINFUEL = 3,
EMERGENCY_NORDO = 4,
EMERGENCY_UNLAWFUL = 5,
EMERGENCY_DOWNED = 6,
EMERGENCY_RESERVED = 7
} emergency_t;
typedef enum {
NAV_ALT_INVALID, NAV_ALT_UNKNOWN, NAV_ALT_AIRCRAFT, NAV_ALT_MCP, NAV_ALT_FMS
} nav_altitude_source_t;
#define MODES_NON_ICAO_ADDRESS (1<<24) // Set on addresses to indicate they are not ICAO addresses
#define MODES_INTERACTIVE_REFRESH_TIME 250 // Milliseconds
#define MODES_INTERACTIVE_DISPLAY_TTL 60000 // Delete from display after 60 seconds
#define MODES_NET_HEARTBEAT_INTERVAL 60000 // milliseconds
#define MODES_CLIENT_BUF_SIZE 1024
#define MODES_NET_SNDBUF_SIZE (1024*64)
#define MODES_NET_SNDBUF_MAX (7)
#define HISTORY_SIZE 120
#define HISTORY_INTERVAL 30000
#define MODES_NOTUSED(V) ((void) V)
#define MAX_AMPLITUDE 65535.0
#define MAX_POWER (MAX_AMPLITUDE * MAX_AMPLITUDE)
// Include subheaders after all the #defines are in place
#include "util.h"
#include "anet.h"
#include "net_io.h"
#include "crc.h"
#include "demod_2400.h"
#include "stats.h"
#include "cpr.h"
#include "icao_filter.h"
#include "convert.h"
#include "sdr.h"
#include "fifo.h"
//======================== structure declarations =========================
typedef enum {
SDR_NONE, SDR_IFILE, SDR_RTLSDR, SDR_BLADERF, SDR_HACKRF, SDR_LIMESDR
} sdr_type_t;
// Program global state
struct _Modes { // Internal state
pthread_t reader_thread;
pthread_mutex_t reader_cpu_mutex; // mutex protecting reader_cpu_accumulator
struct timespec reader_cpu_accumulator; // accumulated CPU time used by the reader thread
struct timespec reader_cpu_start; // start time for the last reader thread CPU measurement
unsigned trailing_samples; // extra trailing samples in magnitude buffers
double sample_rate; // actual sample rate in use (in hz)
uint16_t *log10lut; // Magnitude -> log10 lookup table
atomic_int exit; // Exit from the main loop when true (2 = unclean exit)
// Sample conversion
int dc_filter; // should we apply a DC filter?
// RTLSDR
char * dev_name;
int gain;
int freq;
// Networking
char aneterr[ANET_ERR_LEN];
struct net_service *services; // Active services
struct client *clients; // Our clients
struct net_service *beast_verbatim_service; // Beast-format output service, verbatim mode
struct net_service *beast_cooked_service; // Beast-format output service, "cooked" mode
struct net_writer raw_out; // AVR-format output
struct net_writer beast_verbatim_out; // Beast-format output, verbatim mode
struct net_writer beast_cooked_out; // Beast-format output, "cooked" mode
struct net_writer sbs_out; // SBS-format output
struct net_writer stratux_out; // Stratux-format output
struct net_writer fatsv_out; // FATSV-format output
#ifdef _WIN32
WSADATA wsaData; // Windows socket initialisation
#endif
// Configuration
sdr_type_t sdr_type; // where are we getting data from?
int nfix_crc; // Number of crc bit error(s) to correct
int check_crc; // Only display messages with good CRC
int raw; // Raw output format
int mode_ac; // Enable decoding of SSR Modes A & C
int mode_ac_auto; // allow toggling of A/C by Beast commands
int net; // Enable networking
int net_only; // Enable just networking
uint64_t net_heartbeat_interval; // TCP heartbeat interval (milliseconds)
int net_output_flush_size; // Minimum Size of output data
uint64_t net_output_flush_interval; // Maximum interval (in milliseconds) between outputwrites
char *net_output_raw_ports; // List of raw output TCP ports
char *net_input_raw_ports; // List of raw input TCP ports
char *net_output_sbs_ports; // List of SBS output TCP ports
char *net_output_stratux_ports; // List of Stratux output TCP ports
char *net_input_beast_ports; // List of Beast input TCP ports
char *net_output_beast_ports; // List of Beast output TCP ports
char *net_bind_address; // Bind address
int net_sndbuf_size; // TCP output buffer size (64Kb * 2^n)
int net_verbatim; // if true, Beast output connections default to verbatim mode
int forward_mlat; // allow forwarding of mlat messages to output ports
int quiet; // Suppress stdout
uint32_t show_only; // Only show messages from this ICAO
int interactive; // Interactive mode
uint64_t interactive_display_ttl;// Interactive mode: TTL display
uint64_t stats; // Interval (millis) between stats dumps,
int stats_range_histo; // Collect/show a range histogram?
int onlyaddr; // Print only ICAO addresses
int metric; // Use metric units
int use_gnss; // Use GNSS altitudes with H suffix ("HAE", though it isn't always) when available
int mlat; // Use Beast ascii format for raw data output, i.e. @...; iso *...;
char *json_dir; // Path to json base directory, or NULL not to write json.
uint64_t json_interval; // Interval between rewriting the json aircraft file, in milliseconds; also the advertised map refresh interval
int json_location_accuracy; // Accuracy of location metadata: 0=none, 1=approx, 2=exact
int json_aircraft_history_next;
struct {
char *content;
int clen;
} json_aircraft_history[HISTORY_SIZE];
// User details
double fUserLat; // Users receiver/antenna lat/lon needed for initial surface location
double fUserLon; // Users receiver/antenna lat/lon needed for initial surface location
int bUserFlags; // Flags relating to the user details
double maxRange; // Absolute maximum decoding range, in *metres*
// State tracking
struct aircraft *aircrafts;
// Statistics
struct stats stats_current;
struct stats stats_alltime;
struct stats stats_periodic;
struct stats stats_1min[15];
int stats_latest_1min;
struct stats stats_5min;
struct stats stats_15min;
};
extern struct _Modes Modes;
// The struct we use to store information about a decoded message.
struct modesMessage {
// Generic fields
unsigned char msg[MODES_LONG_MSG_BYTES]; // Binary message.
unsigned char verbatim[MODES_LONG_MSG_BYTES]; // Binary message, as originally received before correction
int msgbits; // Number of bits in message
int msgtype; // Downlink format #
uint32_t crc; // Message CRC
int correctedbits; // No. of bits corrected
uint32_t addr; // Address Announced
addrtype_t addrtype; // address format / source
uint64_t timestampMsg; // Timestamp of the message (12MHz clock)
uint64_t sysTimestampMsg; // Timestamp of the message (system time)
int remote; // If set this message is from a remote station
double signalLevel; // RSSI, in the range [0..1], as a fraction of full-scale power
int score; // Scoring from scoreModesMessage, if used
int reliable; // is this a "reliable" message (uncorrected DF11/DF17/DF18)?
datasource_t source; // Characterizes the overall message source
// Raw data, just extracted directly from the message
// The names reflect the field names in Annex 4
unsigned IID; // extracted from CRC of DF11s
unsigned AA;
unsigned AC;
unsigned CA;
unsigned CC;
unsigned CF;
unsigned DR;
unsigned FS;
unsigned ID;
unsigned KE;
unsigned ND;
unsigned RI;
unsigned SL;
unsigned UM;
unsigned VS;
unsigned char MB[7];
unsigned char MD[10];
unsigned char ME[7];
unsigned char MV[7];
// Decoded data
unsigned altitude_baro_valid : 1;
unsigned altitude_geom_valid : 1;
unsigned track_valid : 1;
unsigned track_rate_valid : 1;
unsigned heading_valid : 1;
unsigned roll_valid : 1;
unsigned gs_valid : 1;
unsigned ias_valid : 1;
unsigned tas_valid : 1;
unsigned mach_valid : 1;
unsigned baro_rate_valid : 1;
unsigned geom_rate_valid : 1;
unsigned squawk_valid : 1;
unsigned callsign_valid : 1;
unsigned cpr_valid : 1;
unsigned cpr_odd : 1;
unsigned cpr_decoded : 1;
unsigned cpr_relative : 1;
unsigned category_valid : 1;
unsigned geom_delta_valid : 1;
unsigned from_mlat : 1;
unsigned from_tisb : 1;
unsigned spi_valid : 1;
unsigned spi : 1;
unsigned alert_valid : 1;
unsigned alert : 1;
unsigned emergency_valid : 1;
unsigned metype; // DF17/18 ME type
unsigned mesub; // DF17/18 ME subtype
commb_format_t commb_format; // Inferred format of a comm-b message
// valid if altitude_baro_valid:
int altitude_baro; // Altitude in either feet or meters
altitude_unit_t altitude_baro_unit; // the unit used for altitude
// valid if altitude_geom_valid:
int altitude_geom; // Altitude in either feet or meters
altitude_unit_t altitude_geom_unit; // the unit used for altitude
// following fields are valid if the corresponding _valid field is set:
int geom_delta; // Difference between geometric and baro alt
float heading; // ground track or heading, degrees (0-359). Reported directly or computed from from EW and NS velocity
heading_type_t heading_type;// how to interpret 'track_or_heading'
float track_rate; // Rate of change of track, degrees/second
float roll; // Roll, degrees, negative is left roll
struct {
// Groundspeed, kts, reported directly or computed from from EW and NS velocity
// For surface movement, this has different interpretations for v0 and v2; both
// fields are populated. The tracking layer will update "gs.selected".
float v0;
float v2;
float selected;
} gs;
unsigned ias; // Indicated airspeed, kts
unsigned tas; // True airspeed, kts
double mach; // Mach number
int baro_rate; // Rate of change of barometric altitude, feet/minute
int geom_rate; // Rate of change of geometric (GNSS / INS) altitude, feet/minute
unsigned squawk; // 13 bits identity (Squawk), encoded as 4 hex digits
char callsign[9]; // 8 chars flight number, NUL-terminated
unsigned category; // A0 - D7 encoded as a single hex byte
emergency_t emergency; // emergency/priority status
// valid if cpr_valid
cpr_type_t cpr_type; // The encoding type used (surface, airborne, coarse TIS-B)
unsigned cpr_lat; // Non decoded latitude.
unsigned cpr_lon; // Non decoded longitude.
unsigned cpr_nucp; // NUCp/NIC value implied by message type
airground_t airground; // air/ground state
// valid if cpr_decoded:
double decoded_lat;
double decoded_lon;
unsigned decoded_nic;
unsigned decoded_rc;
// various integrity/accuracy things
struct {
unsigned nic_a_valid : 1;
unsigned nic_b_valid : 1;
unsigned nic_c_valid : 1;
unsigned nic_baro_valid : 1;
unsigned nac_p_valid : 1;
unsigned nac_v_valid : 1;
unsigned gva_valid : 1;
unsigned sda_valid : 1;
unsigned nic_a : 1; // if nic_a_valid
unsigned nic_b : 1; // if nic_b_valid
unsigned nic_c : 1; // if nic_c_valid
unsigned nic_baro : 1; // if nic_baro_valid
unsigned nac_p : 4; // if nac_p_valid
unsigned nac_v : 3; // if nac_v_valid
unsigned sil : 2; // if sil_type != SIL_INVALID
sil_type_t sil_type;
unsigned gva : 2; // if gva_valid
unsigned sda : 2; // if sda_valid
} accuracy;
// Operational Status
struct {
unsigned valid : 1;
unsigned version : 3;
unsigned om_acas_ra : 1;
unsigned om_ident : 1;
unsigned om_atc : 1;
unsigned om_saf : 1;
unsigned cc_acas : 1;
unsigned cc_cdti : 1;
unsigned cc_1090_in : 1;
unsigned cc_arv : 1;
unsigned cc_ts : 1;
unsigned cc_tc : 2;
unsigned cc_uat_in : 1;
unsigned cc_poa : 1;
unsigned cc_b2_low : 1;
unsigned cc_lw_valid : 1;
heading_type_t tah;
heading_type_t hrd;
unsigned cc_lw;
unsigned cc_antenna_offset;
} opstatus;
// combined:
// Target State & Status (ADS-B V2 only)
// Comm-B BDS4,0 Vertical Intent
struct {
unsigned heading_valid : 1;
unsigned fms_altitude_valid : 1;
unsigned mcp_altitude_valid : 1;
unsigned qnh_valid : 1;
unsigned modes_valid : 1;
float heading; // heading, degrees (0-359) (could be magnetic or true heading; magnetic recommended)
heading_type_t heading_type;
unsigned fms_altitude; // FMS selected altitude
unsigned mcp_altitude; // MCP/FCU selected altitude
float qnh; // altimeter setting (QFE or QNH/QNE), millibars
nav_altitude_source_t altitude_source;
nav_modes_t modes;
} nav;
};
// This one needs modesMessage:
#include "track.h"
#include "mode_s.h"
#include "comm_b.h"
// ======================== function declarations =========================
#ifdef __cplusplus
extern "C" {
#endif
//
// Functions exported from mode_ac.c
//
int detectModeA (uint16_t *m, struct modesMessage *mm);
void decodeModeAMessage(struct modesMessage *mm, int ModeA);
void modeACInit();
int modeAToModeC (unsigned int modeA);
unsigned modeCToModeA (int modeC);
//
// Functions exported from interactive.c
//
void interactiveInit(void);
void interactiveShowData(void);
void interactiveCleanup(void);
void interactiveNoConnection(void);
// Provided by dump1090.c / view1090.c / faup1090.c
void receiverPositionChanged(float lat, float lon, float alt);
#ifdef __cplusplus
}
#endif
#endif // __DUMP1090_H