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readsb.h
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readsb.h
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// Part of readsb, a Mode-S/ADSB/TIS message decoder.
//
// readsb.h: main program header
//
// Copyright (c) 2019 Michael Wolf <michael@mictronics.de>
//
// This code is based on a detached fork of dump1090-fa.
//
// Copyright (c) 2014-2016 Oliver Jowett <oliver@mutability.co.uk>
//
// This file is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// 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
// license:
//
// Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>
//
// 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
#ifndef ALL_JSON
#define ALL_JSON 0
#endif
// Default version number, if not overriden by the Makefile
#ifndef MODES_READSB_VERSION
#define MODES_READSB_VERSION "Unknown"
#endif
#ifndef MODES_READSB_VARIANT
#define MODES_READSB_VARIANT "readsb"
#endif
#define VERSION_STRING MODES_READSB_VARIANT " version: " MODES_READSB_VERSION
// ============================= Include files ==========================
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <pthread.h>
#include <semaphore.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 <sys/types.h>
#include <dirent.h>
#include <zlib.h>
#include <inttypes.h>
#include <sched.h>
#include <sys/epoll.h>
#include <sys/eventfd.h>
#include "minilzo/minilzo.h"
#include "threadpool.h"
#include <stdatomic.h>
#include <zstd.h>
#include <sys/mman.h>
#include "compat/compat.h"
// ============================= #defines ===============================
#define MODES_DEFAULT_FREQ 1090000000
#define MODES_RTL_BUFFERS 16 // Number of RTL buffers
#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_RTL_AGC 590 // Use rtl tuner agc
#define MODEAC_MSG_BYTES 2
#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 (48*1024)
#define MODES_OUT_FLUSH_INTERVAL (500) // max flush interval
// needs to be larger than OUT_BUF_SIZE above
#define MODES_NET_SNDBUF_SIZE (64*1024)
#define MODES_NET_SNDBUF_MAX (7)
#define HEX_UNKNOWN (0xDEADBEEF)
#define DFTYPE_MODEAC 77
#define INVALID_ALTITUDE (-9999)
#define CANARY (0x665225ca79e653a3)
#define MESSAGE_RATE_CALC_POINTS (2)
// size of various on stack buffers used across the code, let's just be conservative and assume 1 MB of stack
// without heavy recursion 3 of those stack buffers can be in use at the same time, at most we expect to to be in use
#define QUARTER_STACK (256 * 1024)
/* Where did a bit of data arrive from? In order of increasing priority */
typedef enum
{
SOURCE_INVALID, /* data is not valid */
SOURCE_INDIRECT, /* data is of unknown quality */
SOURCE_MODE_AC, /* A/C message */
SOURCE_SBS, /* data is of unknown quality */
SOURCE_MLAT, /* derived from mlat */
SOURCE_MODE_S, /* data from a Mode S message, no full CRC */
SOURCE_JAERO, /* data is from satellite ADS-C */
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 */
SOURCE_PRIO, /* priority input */
} datasource_t;
/* What sort of address is this and who sent it?
* (Earlier values are higher priority)
*/
typedef enum
{
ADDR_ADSB_ICAO = 0, /* ADS-B, ICAO address, transponder sourced */
ADDR_ADSB_ICAO_NT = 1, /* ADS-B, ICAO address, non-transponder */
ADDR_ADSR_ICAO = 2, /* ADS-R, ICAO address */
ADDR_TISB_ICAO = 3, /* TIS-B, ICAO address */
ADDR_JAERO = 4,
ADDR_MLAT = 5,
ADDR_OTHER = 6,
ADDR_MODE_S = 7,
ADDR_ADSB_OTHER = 8, /* ADS-B, other address format */
ADDR_ADSR_OTHER = 9, /* ADS-R, other address format */
ADDR_TISB_TRACKFILE = 10, /* TIS-B, Mode A code + track file number */
ADDR_TISB_OTHER = 11, /* TIS-B, other address format */
ADDR_MODE_A = 12, /* Mode A */
ADDR_UNKNOWN = 15/* unknown address format */
} addrtype_t;
// number of types as defined above
#define NUM_TYPES 14
typedef enum
{
UNIT_FEET,
UNIT_METERS
} altitude_unit_t;
typedef enum
{
ALTITUDE_BARO,
ALTITUDE_GEOM
} altitude_source_t;
typedef enum
{
AG_INVALID = 0,
AG_GROUND = 1,
AG_AIRBORNE = 2,
AG_UNCERTAIN = 3
} airground_t;
typedef enum
{
SIL_INVALID, SIL_UNKNOWN, SIL_PER_SAMPLE, SIL_PER_HOUR
} sil_type_t;
typedef enum
{
CPR_INVALID, CPR_SURFACE, CPR_AIRBORNE, CPR_COARSE
} cpr_type_t;
typedef enum
{
CPR_NONE, CPR_LOCAL, CPR_GLOBAL
} cpr_local_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_METEOROLOGICAL_ROUTINE
} 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 BADDR (0xff123456) // invalid address used to set stuff like cpr_focus and show_only default value
#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 ENABLE_DF24
#define HISTORY_SIZE 120
#define HISTORY_INTERVAL 30000
#define MODES_NOTUSED(V) ((void) V)
#ifndef AIRCRAFT_HASH_BITS
#define AIRCRAFT_HASH_BITS 20
#endif
#define AIRCRAFT_BUCKETS (1 << AIRCRAFT_HASH_BITS) // this is critical for hashing purposes
#define MODES_ICAO_FILTER_TTL 60000
#define DB_HASH_BITS 20
#define DB_BUCKETS (1 << DB_HASH_BITS) // this is critical for hashing purposes
#define STATE_BLOBS 256 // change naming scheme if increasing this
#define LOCK_THREADS_MAX 64
#define PERIODIC_UPDATE (1 * SECONDS)
#define REMOVE_STALE_INTERVAL (1 * SECONDS)
#define STAT_BUCKETS 90 // 90 * 10 seconds = 15 min (max interval in stats.json)
#define RANGEDIRS_BUCKETS 360
#define RANGEDIRS_IVALS 64
#define PING_REJECT (3 * SECONDS)
#define PING_DISCONNECT (15 * SECONDS)
#define PING_BUCKETS 20 // statistics on round trip time
#define PING_BUCKETBASE (24) // milliseconds of first bucket
#define PING_BUCKETMULT (1.2) // each bucket will grow by that factor
#define PING_REDUCE (1500) // 1.5 seconds
#define PING_REDUCE_DURATION (15 * SECONDS)
#define GARBAGE_THRESHOLD (512)
/* A timestamp that indicates the data is synthetic, created from a
* multilateration result
*/
#define MAGIC_MLAT_TIMESTAMP 0xFF004D4C4154LL
#define MAGIC_UAT_TIMESTAMP 0xFF004D4C4155LL
#define MAGIC_NOFORWARD_TIMESTAMP 0xFF004D4C4160LL
#define MAGIC_ANY_TIMESTAMP 0xFFFFFFFFFFFFULL
#define likely(x) __builtin_expect((x),1)
#define unlikely(x) __builtin_expect((x),0)
#if defined(__llvm__)
#define _unroll_8 _Pragma ("unroll 8")
#define _unroll_16 _Pragma ("unroll 16")
#define _unroll_32 _Pragma ("unroll 32")
#elif defined(__GNUC__)
#if __GNUC__ >= 8
#define _unroll_8 _Pragma ("GCC unroll 8")
#define _unroll_16 _Pragma ("GCC unroll 16")
#define _unroll_32 _Pragma ("GCC unroll 32")
#else
#define _unroll_8
#define _unroll_16
#define _unroll_32
#endif
#else
#define _unroll_8
#define _unroll_16
#define _unroll_32
#endif
void setExit(int arg);
int priorityTasksPending();
void priorityTasksRun();
#define MemoryAlignment 32
#define ALIGNED __attribute__((aligned(MemoryAlignment)))
static inline void *malloc_or_exit(size_t alignment, size_t size, const char *file, int line) {
void *buf = NULL;
if (alignment && 0) {
// disabled for the moment
size_t mod = size % alignment;
if (mod != 0) {
size += (alignment - mod);
}
buf = aligned_alloc(alignment, size);
if (0) {
mod = size % alignment;
if (mod != 0) {
fprintf(stderr, "aligned_alloc bad alignment: %ld\n", (long) mod);
}
}
} else {
buf = malloc(size);
}
if (unlikely(!buf)) {
setExit(2); // irregular exit ... soon
fprintf(stderr, "FATAL: malloc_or_exit() of size %lld failed: %s:%d (insufficient memory?)\n", (long long) size, file, line);
}
return buf;
}
// disable this ... maybe it test in the future if it makes a diff if i'm bored
#if 0
#define cmalloc(size) malloc_or_exit(MemoryAlignment, size, __FILE__, __LINE__)
#else
#define cmalloc(size) malloc_or_exit(0, size, __FILE__, __LINE__)
#endif
// Include subheaders after all the #defines are in place
#include "toString.h"
#include "util.h"
#include "fasthash.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 "aircraft.h"
#include "globe_index.h"
#include "receiver.h"
#include "geomag.h"
#include "json_out.h"
#include "api.h"
//======================== structure declarations =========================
typedef enum
{
SDR_NONE = 0, SDR_IFILE, SDR_RTLSDR, SDR_BLADERF, SDR_MICROBLADERF, SDR_HACKRF, SDR_MODESBEAST, SDR_PLUTOSDR, SDR_SOAPYSDR, SDR_GNS
} sdr_type_t;
// Structure representing one magnitude buffer
struct mag_buf
{
int64_t sampleTimestamp; // Clock timestamp of the start of this block, 12MHz clock
double mean_level; // Mean of normalized (0..1) signal level
double mean_power; // Mean of normalized (0..1) power level
uint32_t dropped; // Number of dropped samples preceding this buffer
unsigned length; // Number of valid samples _after_ overlap. Total buffer length is buf->length + Modes.trailing_samples.
int64_t sysTimestamp; // Estimated system time at start of block
int64_t sysMicroseconds; // sysTimestamp in microseconds
uint32_t loudEvents;
uint32_t noiseLowSamples;
uint32_t noiseHighSamples;
uint32_t padding2;
uint16_t *data; // Magnitude data. Starts with Modes.trailing_samples worth of overlap from the previous block
#if defined(__arm__)
/*padding 4 bytes*/
uint32_t padding;
#endif
};
// Program global state
struct _Threads {
threadT upkeep; // runs priorityTasksUpdate, locks most other threads when doing its thing
threadT decode; // thread doing demodulation, decoding and networking
threadT reader;
threadT json; // thread writing json
threadT globeJson; // thread writing json
threadT globeBin; // thread writing binCraft
threadT misc;
threadT apiUpdate;
};
extern struct _Threads Threads;
struct modeMessage;
struct messageBuffer {
struct modesMessage *msg;
int len;
int alloc;
int id;
struct client *activeClient;
};
struct _Modes
{ // Internal state
pthread_mutex_t traceDebugMutex;
int num_procs;
int allPoolSize;
threadpool_t *allPool;
task_group_t *allTasks;
uint32_t sdr_buf_size;
uint32_t sdr_buf_samples;
int64_t traceWriteTimelimit;
int tracePoolSize;
threadpool_t *tracePool;
task_group_t *traceTasks;
int triggerPastDayTraceWrite;
int lockThreadsCount;
threadT *lockThreads[LOCK_THREADS_MAX];
struct timespec hungTimer1;
struct timespec hungTimer2;
pthread_mutex_t hungTimerMutex;
char *currentTask;
int64_t joinTimeout;
unsigned first_free_buffer; // Entry in mag_buffers that will next be filled with input.
unsigned first_filled_buffer; // Entry in mag_buffers that has valid data and will be demodulated next. If equal to next_free_buffer, there is no unprocessed data.
unsigned trailing_samples; // extra trailing samples in magnitude buffers
int volatile exit; // Exit from the main loop when true
int volatile exitSoon;
int fd; // --ifile option file descriptor
input_format_t input_format; // --iformat option
iq_convert_fn converter_function;
char * dev_name;
pthread_mutex_t sdrControlMutex;
int8_t sdrInitialized;
int8_t sdrOpenFailed;
int8_t increaseGain;
int8_t lowerGain;
int8_t autoGain;
int8_t gainQuiet;
int8_t gainStartup;
char *gainArg;
uint32_t loudThreshold;
uint32_t noiseLowThreshold;
uint32_t noiseHighThreshold;
int minGain;
int gain;
int dc_filter; // should we apply a DC filter?
int enable_agc;
sdr_type_t sdr_type; // where are we getting data from?
int freq;
int ppm_error;
char aneterr[ANET_ERR_LEN];
struct net_service_group services_in; // Active services which primarily receive data
struct net_service_group services_out; // Active services which primarily send data
int exitNowEventfd;
int exitSoonEventfd;
int net_epfd; // epoll fd used for most network stuff
int net_event_count;
int net_maxEvents;
struct epoll_event *net_events;
struct messageBuffer *netMessageBuffer;
int decodeThreads;
threadpool_t *decodePool;
task_group_t *decodeTasks;
pthread_mutex_t decodeLock;
pthread_mutex_t trackLock;
pthread_mutex_t outputLock;
int max_fds;
int max_fds_api;
int max_fds_net;
int modesClientCount;
int api_fds_per_thread;
int total_aircraft_count;
float estimated_ppm;
uint64_t trace_chunk_size;
uint64_t trace_cache_size;
uint64_t trace_current_size;
ssize_t volatile state_chunk_size;
ssize_t volatile state_chunk_size_read;
ALIGNED struct aircraft * aircraft[AIRCRAFT_BUCKETS];
ALIGNED struct craftArray globeLists[GLOBE_MAX_INDEX+1];
int receiver_table_hash_bits;
int receiver_table_size;
struct receiver **receiverTable;
struct craftArray aircraftActive;
dbEntry *db;
dbEntry **dbIndex;
struct char_buffer dbRaw;
dbEntry *db2;
dbEntry **db2Index;
struct char_buffer db2Raw;
int64_t dbModificationTime;
int64_t receiverCount;
struct net_writer raw_out; // Raw output
struct net_writer beast_out; // Beast-format output
struct net_writer beast_reduce_out; // Reduced data Beast-format output
struct net_writer beast_in; // for sending pings to clients sending us beast data
struct net_writer garbage_out; // Beast-format output
struct net_writer sbs_out; // SBS-format output
struct net_writer sbs_out_replay; // SBS-format output
struct net_writer sbs_out_mlat; // SBS-format output
struct net_writer sbs_out_jaero; // SBS-format output
struct net_writer sbs_out_prio; // SBS-format output
struct net_writer json_out; // SBS-format output
struct net_writer asterix_out; // Asterix output
struct net_writer feedmap_out; // SBS-format output
struct net_writer vrs_out; // SBS-format output
struct net_writer fatsv_out; // FATSV-format output
struct net_writer gpsd_in; // for sending 1 line to gpsd
struct net_writer uat_replay_out; // UAT replay output
struct net_service *beast_in_service;
struct net_service *uat_in_service;
struct hexInterval* deleteTrace;
int write_state_blob;
int writeInternalState;
char *replace_state_blob;
int64_t replace_state_inhibit_traces_until;
int64_t network_time_limit;
uint32_t currentPing;
int8_t apiUpdate; // creates json snippets also by non api stuff
int8_t api; // enable api output
int8_t apiBufferInitDone;
int apiThreadCount;
atomic_int apiWorkerCpuMicro;
atomic_uint apiRequestCounter;
atomic_int recentTraceWrites;
atomic_int fullTraceWrites;
atomic_int permTraceWrites;
struct net_service apiService;
struct apiCon **apiListeners;
struct apiBuffer apiBuffer[2];
atomic_int *apiFlip;
struct apiThread *apiThread;
pthread_mutex_t apiFlipMutex; // mutex to read apiFlip
float messageRate;
uint32_t messageRateAcc[MESSAGE_RATE_CALC_POINTS];
int64_t nextMessageRateCalc;
// Configuration
int8_t nfix_crc; // Number of crc bit error(s) to correct
int8_t fixDF; // fix message type single bit errors that become DF17
int8_t check_crc; // Only display messages with good CRC
int8_t raw; // Raw output format
int8_t mode_ac; // Enable decoding of SSR Modes A & C
int8_t mode_ac_auto; // allow toggling of A/C by Beast commands
int8_t debug_net;
int8_t debug_serial;
int8_t debug_flush;
int8_t debug_no_discard;
int8_t debug_nextra;
int8_t debug_cpr;
int8_t debug_speed_check;
int8_t debug_garbage;
int8_t debug_receiver;
int8_t debug_rough_receiver_location;
int8_t debug_traceCount;
int8_t debug_traceAlloc;
int8_t debug_sampleCounter;
int8_t debug_dbJson;
int8_t debug_ACAS;
int8_t debug_api;
int8_t debug_recent;
int8_t debug_squawk;
int8_t debug_ping;
int8_t debug_callsign;
int8_t debug_nogps;
int8_t debug_uuid;
int8_t debug_bogus;
int8_t decode_all;
int8_t debug_maxRange;
int8_t debug_removeStaleDuration;
int8_t debug_receiverRangeLimit;
int8_t debug_yeet;
int8_t debug_7700;
int8_t debug_send_uuid;
int8_t debug_provoke_segfault;
int8_t debug_position_timing;
int8_t debug_lastStatus;
int8_t debug_gps;
int8_t debug_planefinder;
int8_t debug_zstd;
int8_t legacy_history;
int8_t enable_zstd;
int8_t incrementId;
int8_t omitGlobeFiles;
int8_t tar1090_no_globe;
int8_t enableAcasCsv;
int8_t enableAcasJson;
int8_t dump_accept_synthetic_now;
int8_t syntethic_now_suppress_errors;
int8_t tar1090_use_api;
int8_t verbose;
int8_t net_verbatim; // if true, send the original message, not the CRC-corrected one
int8_t netReceiverId;
int8_t ping;
int8_t netReceiverIdPrint;
int8_t netReceiverIdJson;
int8_t netIngest;
int8_t enableClientsJson;
int8_t forward_mlat; // forward beast mlat messages to beast output ports
int8_t forward_mlat_sbs; // forward mlat messages to sbs output ports
int8_t beast_forward_noforward;
int8_t beast_set_noforward_timestamp;
int8_t quiet; // Suppress stdout
int8_t interactive; // Interactive mode
int8_t stats_range_histo; // Collect/show a range histogram?
int8_t outline_json; // write a range outline json file
int8_t onlyaddr; // Print only ICAO addresses
int8_t metric; // Use metric units
int8_t use_gnss; // Use GNSS altitudes with H suffix ("HAE", though it isn't always) when available
int8_t mlat; // Use Beast ascii format for raw data output, i.e. @...; iso *...;
int8_t json_location_accuracy; // Accuracy of location metadata: 0=none, 1=approx, 2=exact
int8_t net; // Enable networking
int8_t net_only; // Enable just networking
int8_t jsonLongtype;
int8_t viewadsb;
int8_t sbsReduce; // apply beast reduce logic to SBS messages
int8_t asterixReduce; // apply beast reduce logic to SBS messages
int8_t beast_reduce_optimize_mlat; // keep all messages relevant to mlat-client (best-effort)
int position_persistence; // Maximum number of consecutive implausible positions from global CPR to invalidate a known position
int json_reliable;
uint32_t filterDF; // Only show messages with certain DF types
uint32_t filterDFbitset; // Bitset, Only show messages with these DF types
int64_t trackExpireJaero;
int64_t trackExpireMax;
uint32_t cpr_focus;
uint32_t trace_focus;
uint32_t leg_focus;
uint32_t show_only; // Only show messages from this ICAO
uint64_t receiver_focus;
uint32_t preambleThreshold;
uint32_t net_forward_min_messages;
int net_output_flush_size; // Minimum Size of output data
int32_t net_output_beast_reduce_interval; // Position update interval for data reduction
int32_t ping_reduce;
int32_t ping_reject;
int32_t log_usb_jitter;
int32_t devel_log_ppm;
int64_t doubleBeastReduceIntervalUntil;
float beast_reduce_filter_distance;
float beast_reduce_filter_altitude;
int64_t net_connector_delay;
int64_t net_connector_delay_min;
int64_t next_reconnect_callback;
int64_t last_connector_fail;
int32_t net_heartbeat_interval; // TCP heartbeat interval (milliseconds)
int32_t net_output_flush_interval; // Maximum interval (in milliseconds) between outputwrites
int32_t net_output_flush_interval_beast_reduce; // Maximum interval (in milliseconds) between outputwrites
double fUserLat; // Users receiver/antenna lat/lon needed for initial surface location
double fUserLon; // Users receiver/antenna lat/lon needed for initial surface location
double fUserAlt; // receiver altitude AMSL in meters
double maxRange; // Absolute maximum decoding range, in *metres*
char *latString;
char *lonString;
double sample_rate; // actual sample rate in use (in hz)
int64_t interactive_display_ttl; // Interactive mode: TTL display
int64_t json_interval; // Interval between rewriting the json aircraft file, in milliseconds; also the advertised map refresh interval
int64_t stats_display_interval; // Interval (millis) between stats dumps,
int64_t range_outline_duration;
int64_t writeTracesActualDuration; // how long the trace writing cycle took
int64_t auto_exit;
char *db_file;
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_uat_replay_ports; // List of UAT replay output TCP ports
char *net_input_uat_ports; // List of UAT input TCP ports
char *net_input_planefinder_ports; // List of planefinder input TCP ports
char *net_output_sbs_ports; // List of SBS output TCP ports
char *net_input_sbs_ports; // List of SBS input TCP ports
char *net_output_jaero_ports; // jaero SBS output ports
char *net_input_jaero_ports; // jaero SBS input 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_output_beast_reduce_ports; // List of Beast output TCP ports
char *net_output_asterix_ports; // List of Asterix output TCP ports
char *net_input_asterix_ports; // List of Asterix input TCP ports
char *net_output_json_ports;
char *net_output_api_ports;
char *garbage_ports;
char *net_output_vrs_ports; // List of VRS output TCP ports
int64_t net_output_vrs_interval;
int64_t net_output_json_interval;
int net_output_json_include_nopos;
struct net_connector *net_connectors; // client connectors
int net_connectors_count;
int net_connectors_size;
int64_t synthetic_now;
char *uuidFile;
char *filename; // Input form file, --ifile option
char *net_bind_address; // Bind address
char *json_dir; // Path to json base directory, or NULL not to write json.
char *globe_history_dir;
char *state_dir;
char *state_parent_dir;
char *dump_beast_dir; // write raw beast with a timestamp every millisecond for low level replay
zstd_fw_t *dump_fw;
int64_t dump_next_ts; // last timestamp sent
int32_t dump_interval;
int32_t dump_beast_index;
uint64_t dump_lastReceiverId;
int8_t writeTraces;
int8_t dump_reduce; // only dump beast that would be sent out according to reduce_interval
int8_t state_only_on_exit;
int8_t free_aircraft;
int64_t state_write_interval;
char *prom_file;
int64_t heatmap_current_interval;
int64_t heatmap_interval; // don't change data type
int heatmap;
char *heatmap_dir;
int64_t keep_traces; // how long traces are saved in internal memory
int64_t json_trace_interval; // max time ignoring new positions for trace
int32_t traceMax; // max trace length
int32_t traceReserve; // grow trace allocation if we have less than traceReserve free spots
int32_t traceRecentPoints;
int32_t traceCachePoints;
int32_t traceChunkPoints;
int32_t traceChunkMaxBytes;
int json_globe_index; // Enable extra globe indexed json files.
int acasFD1; // file descriptor to write acasFDs to
int acasFD2;
struct tile *json_globe_special_tiles;
int32_t *json_globe_indexes;
int32_t json_globe_indexes_len;
int specialTileCount;
int json_gzip; // Enable extra globe indexed json files.
int beast_fd; // Local Modes-S Beast handler
int beast_baudrate; // Mode-S beast and similar baud rate
char *beast_serial; // Modes-S Beast device path
struct client *serial_client;
int net_sndbuf_size; // TCP output buffer size (64Kb * 2^n)
int json_aircraft_history_next;
int json_aircraft_history_full;
int trace_hist_only;
int sbsOverrideSquawk;
float messageRateMult;
uint32_t binCraftVersion; // never change the type for this variable
int8_t userLocationValid;
int8_t biastee;
int8_t triggerPermWriteDay;
int8_t acasDay;
int8_t traceDay;
int8_t onlyBin; // only write binCraft for globe (1) and also aircraft.json (2)
int8_t enableBinGz;
int8_t updateStats;
int8_t staleStop;
struct timespec reader_cpu_accumulator; // CPU time used by the reader thread, copied out and reset by the main thread under the mutex
ALIGNED struct mag_buf mag_buffers[MODES_MAG_BUFFERS]; // Converted magnitude buffers from RTL or file input
int64_t startup_time;
int64_t startup_time_mono;
int64_t next_stats_update;
int64_t next_stats_display;
int64_t next_api_update;
int64_t next_remove_stale;
int stats_bucket; // index that has just been writte to
ALIGNED struct stats stats_10[STAT_BUCKETS];
struct stats stats_current;
struct stats stats_alltime;
struct stats stats_periodic;
struct stats stats_1min;
struct stats stats_5min;
struct stats stats_15min;
struct statsCount globalStatsCount;
// array for thread numbers
ALIGNED int threadNumber[256];
int lastRangeDirHour;
ALIGNED struct distCoords rangeDirs[RANGEDIRS_IVALS][RANGEDIRS_BUCKETS];
int64_t apiShutdownDelay;
};
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
double signalLevel; // RSSI, in the range [0..1], as a fraction of full-scale power
struct client *client; // network client this message came from, NULL otherwise
struct aircraft *aircraft; // tracked aircraft associated with this message or NULL
struct messageBuffer *messageBuffer;
int64_t timestamp; // Timestamp of the message (12MHz clock)
int64_t sysTimestamp; // Timestamp of the message (system time)
uint64_t receiverId; // zero if not transmitted
int msgtype; // Downlink format #
int msgbits; // Number of bits in message
int score; // Scoring from scoreModesMessage, if used
int receiverCountMlat; // number of receivers for MLAT messages
int mlatEPU; // estimated position uncertainty
int correctedbits; // No. of bits corrected
int decodeResult;
uint32_t crc; // Message CRC
uint32_t addr; // Address Announced
uint32_t maybe_addr; // probably the address, good chance to be wrong
addrtype_t addrtype; // address format / source
int8_t remote; // If set this message is from a remote station
int8_t sbs_in; // Signifies this message is coming from basestation input
int8_t address_reliable;
int8_t sbsMsgType; // SBS message type
int8_t reduce_forward; // forward this message for reduced beast output
int8_t garbage; // from garbage receiver
int8_t duplicate; // associated position is a duplicate
int8_t duplicate_checked; // duplicate check done
int8_t pos_bad; // speed_check failed
int8_t pos_ignore; // associated position is old / delayed / misc error
int8_t pos_old; // associated position is old / delayed / misc error
int8_t pos_receiver_range_exceeded;
int8_t trackUnreliable;
int8_t speedUnreliable;
int8_t in_disc_cache;
int8_t jsonPositionOutputEmit;
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 metype; // DF17/18 ME type
unsigned mesub; // DF17/18 ME subtype
unsigned char MB[7];
unsigned char MD[10];
unsigned char ME[7];
unsigned char MV[7];
// Decoded data
bool baro_alt_valid;
bool geom_alt_valid;
bool track_valid;
bool track_rate_valid;
bool heading_valid;
bool roll_valid;
bool gs_valid;
bool ias_valid;
bool tas_valid;
bool mach_valid;
bool baro_rate_valid;
bool geom_rate_valid;
bool squawk_valid;
bool callsign_valid;
bool cpr_valid;
bool cpr_odd;
bool cpr_decoded;
bool cpr_relative;
bool category_valid;
bool geom_delta_valid;
bool from_mlat;
bool from_tisb;
bool spi_valid;
bool spi;
bool alert_valid;
bool alert;
bool emergency_valid;
bool sbs_pos_valid;
bool alt_q_bit;
bool acas_ra_valid;
bool geom_alt_derived;