575 lines
22 KiB
C
575 lines
22 KiB
C
// Part of dump1090, a Mode S message decoder for RTLSDR devices.
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//
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// dump1090.h: main program header
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//
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// Copyright (c) 2014-2016 Oliver Jowett <oliver@mutability.co.uk>
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//
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// This file is free software: you may copy, redistribute and/or modify it
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// under the terms of the GNU General Public License as published by the
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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//
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// This file is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// This file incorporates work covered by the following copyright and
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// permission notice:
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//
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// Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef __DUMP1090_H
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#define __DUMP1090_H
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// Default version number, if not overriden by the Makefile
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#ifndef MODES_DUMP1090_VERSION
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# define MODES_DUMP1090_VERSION "v1.13-custom"
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#endif
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#ifndef MODES_DUMP1090_VARIANT
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# define MODES_DUMP1090_VARIANT "dump1090-mutability"
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#endif
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// ============================= Include files ==========================
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#ifndef _WIN32
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <stdint.h>
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#include <errno.h>
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#include <unistd.h>
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#include <math.h>
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#include <sys/time.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <time.h>
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#include <limits.h>
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#else
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#include "winstubs.h" //Put everything Windows specific in here
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#endif
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#include "compat/compat.h"
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// Avoid a dependency on rtl-sdr except where it's really needed.
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typedef struct rtlsdr_dev rtlsdr_dev_t;
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// ============================= #defines ===============================
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#define MODES_DEFAULT_PPM 52
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#define MODES_DEFAULT_FREQ 1090000000
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#define MODES_DEFAULT_WIDTH 1000
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#define MODES_DEFAULT_HEIGHT 700
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#define MODES_RTL_BUFFERS 15 // Number of RTL buffers
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#define MODES_RTL_BUF_SIZE (16*16384) // 256k
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#define MODES_MAG_BUF_SAMPLES (MODES_RTL_BUF_SIZE / 2) // Each sample is 2 bytes
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#define MODES_MAG_BUFFERS 12 // Number of magnitude buffers (should be smaller than RTL_BUFFERS for flowcontrol to work)
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#define MODES_AUTO_GAIN -100 // Use automatic gain
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#define MODES_MAX_GAIN 999999 // Use max available gain
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#define MODES_MSG_SQUELCH_DB 4.0 // Minimum SNR, in dB
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#define MODES_MSG_ENCODER_ERRS 3 // Maximum number of encoding errors
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#define MODEAC_MSG_SAMPLES (25 * 2) // include up to the SPI bit
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#define MODEAC_MSG_BYTES 2
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#define MODEAC_MSG_SQUELCH_LEVEL 0x07FF // Average signal strength limit
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#define MODEAC_MSG_FLAG (1<<0)
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#define MODEAC_MSG_MODES_HIT (1<<1)
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#define MODEAC_MSG_MODEA_HIT (1<<2)
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#define MODEAC_MSG_MODEC_HIT (1<<3)
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#define MODEAC_MSG_MODEA_ONLY (1<<4)
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#define MODEAC_MSG_MODEC_OLD (1<<5)
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#define MODES_PREAMBLE_US 8 // microseconds = bits
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#define MODES_PREAMBLE_SAMPLES (MODES_PREAMBLE_US * 2)
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#define MODES_PREAMBLE_SIZE (MODES_PREAMBLE_SAMPLES * sizeof(uint16_t))
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#define MODES_LONG_MSG_BYTES 14
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#define MODES_SHORT_MSG_BYTES 7
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#define MODES_LONG_MSG_BITS (MODES_LONG_MSG_BYTES * 8)
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#define MODES_SHORT_MSG_BITS (MODES_SHORT_MSG_BYTES * 8)
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#define MODES_LONG_MSG_SAMPLES (MODES_LONG_MSG_BITS * 2)
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#define MODES_SHORT_MSG_SAMPLES (MODES_SHORT_MSG_BITS * 2)
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#define MODES_LONG_MSG_SIZE (MODES_LONG_MSG_SAMPLES * sizeof(uint16_t))
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#define MODES_SHORT_MSG_SIZE (MODES_SHORT_MSG_SAMPLES * sizeof(uint16_t))
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#define MODES_OS_PREAMBLE_SAMPLES (20)
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#define MODES_OS_PREAMBLE_SIZE (MODES_OS_PREAMBLE_SAMPLES * sizeof(uint16_t))
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#define MODES_OS_LONG_MSG_SAMPLES (268)
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#define MODES_OS_SHORT_MSG_SAMPLES (135)
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#define MODES_OS_LONG_MSG_SIZE (MODES_LONG_MSG_SAMPLES * sizeof(uint16_t))
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#define MODES_OS_SHORT_MSG_SIZE (MODES_SHORT_MSG_SAMPLES * sizeof(uint16_t))
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#define MODES_OUT_BUF_SIZE (1500)
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#define MODES_OUT_FLUSH_SIZE (MODES_OUT_BUF_SIZE - 256)
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#define MODES_OUT_FLUSH_INTERVAL (60000)
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#define MODES_USER_LATLON_VALID (1<<0)
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#define INVALID_ALTITUDE (-9999)
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/* Where did a bit of data arrive from? In order of increasing priority */
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typedef enum {
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SOURCE_INVALID, /* data is not valid */
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SOURCE_MLAT, /* derived from mlat */
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SOURCE_MODE_S, /* data from a Mode S message, no full CRC */
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SOURCE_MODE_S_CHECKED, /* data from a Mode S message with full CRC */
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SOURCE_TISB, /* data from a TIS-B extended squitter message */
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SOURCE_ADSB, /* data from a ADS-B extended squitter message */
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} datasource_t;
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/* What sort of address is this and who sent it?
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* (Earlier values are higher priority)
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*/
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typedef enum {
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ADDR_ADSB_ICAO, /* Mode S or ADS-B, ICAO address, transponder sourced */
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ADDR_ADSB_ICAO_NT, /* ADS-B, ICAO address, non-transponder */
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ADDR_ADSR_ICAO, /* ADS-R, ICAO address */
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ADDR_TISB_ICAO, /* TIS-B, ICAO address */
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ADDR_ADSB_OTHER, /* ADS-B, other address format */
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ADDR_ADSR_OTHER, /* ADS-R, other address format */
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ADDR_TISB_TRACKFILE, /* TIS-B, Mode A code + track file number */
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ADDR_TISB_OTHER, /* TIS-B, other address format */
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ADDR_UNKNOWN /* unknown address format */
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} addrtype_t;
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typedef enum {
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UNIT_FEET,
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UNIT_METERS
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} altitude_unit_t;
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typedef enum {
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ALTITUDE_BARO,
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ALTITUDE_GNSS
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} altitude_source_t;
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typedef enum {
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AG_INVALID,
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AG_GROUND,
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AG_AIRBORNE,
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AG_UNCERTAIN
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} airground_t;
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typedef enum {
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SPEED_GROUNDSPEED,
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SPEED_IAS,
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SPEED_TAS
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} speed_source_t;
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typedef enum {
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HEADING_TRUE,
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HEADING_MAGNETIC
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} heading_source_t;
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typedef enum {
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SIL_PER_SAMPLE, SIL_PER_HOUR
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} sil_type_t;
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typedef enum {
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CPR_SURFACE, CPR_AIRBORNE, CPR_COARSE
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} cpr_type_t;
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#define MODES_NON_ICAO_ADDRESS (1<<24) // Set on addresses to indicate they are not ICAO addresses
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#define MODES_DEBUG_DEMOD (1<<0)
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#define MODES_DEBUG_DEMODERR (1<<1)
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#define MODES_DEBUG_BADCRC (1<<2)
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#define MODES_DEBUG_GOODCRC (1<<3)
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#define MODES_DEBUG_NOPREAMBLE (1<<4)
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#define MODES_DEBUG_NET (1<<5)
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#define MODES_DEBUG_JS (1<<6)
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// When debug is set to MODES_DEBUG_NOPREAMBLE, the first sample must be
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// at least greater than a given level for us to dump the signal.
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#define MODES_DEBUG_NOPREAMBLE_LEVEL 25
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#define MODES_INTERACTIVE_REFRESH_TIME 250 // Milliseconds
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#define MODES_INTERACTIVE_ROWS 22 // Rows on screen
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#define MODES_INTERACTIVE_DISPLAY_TTL 60000 // Delete from display after 60 seconds
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#define MODES_NET_HEARTBEAT_INTERVAL 60000 // milliseconds
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#define MODES_CLIENT_BUF_SIZE 1024
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#define MODES_NET_SNDBUF_SIZE (1024*64)
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#define MODES_NET_SNDBUF_MAX (7)
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#ifndef HTMLPATH
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#define HTMLPATH "./public_html" // default path for gmap.html etc
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#endif
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#define HISTORY_SIZE 120
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#define HISTORY_INTERVAL 30000
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#define MODES_NOTUSED(V) ((void) V)
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#define MAX_AMPLITUDE 65535.0
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#define MAX_POWER (MAX_AMPLITUDE * MAX_AMPLITUDE)
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// Include subheaders after all the #defines are in place
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#include "util.h"
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#include "anet.h"
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#include "net_io.h"
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#include "crc.h"
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#include "demod_2400.h"
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#include "stats.h"
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#include "cpr.h"
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#include "icao_filter.h"
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#include "convert.h"
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//======================== structure declarations =========================
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// Structure representing one magnitude buffer
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struct mag_buf {
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uint16_t *data; // Magnitude data. Starts with Modes.trailing_samples worth of overlap from the previous block
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unsigned length; // Number of valid samples _after_ overlap. Total buffer length is buf->length + Modes.trailing_samples.
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uint64_t sampleTimestamp; // Clock timestamp of the start of this block, 12MHz clock
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struct timespec sysTimestamp; // Estimated system time at start of block
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uint32_t dropped; // Number of dropped samples preceding this buffer
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double total_power; // Sum of per-sample input power (in the range [0.0,1.0] per sample), or 0 if not measured
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};
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// Program global state
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struct { // Internal state
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pthread_t reader_thread;
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pthread_mutex_t data_mutex; // Mutex to synchronize buffer access
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pthread_cond_t data_cond; // Conditional variable associated
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struct mag_buf mag_buffers[MODES_MAG_BUFFERS]; // Converted magnitude buffers from RTL or file input
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unsigned first_free_buffer; // Entry in mag_buffers that will next be filled with input.
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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.
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struct timespec reader_cpu_accumulator; // CPU time used by the reader thread, copied out and reset by the main thread under the mutex
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unsigned trailing_samples; // extra trailing samples in magnitude buffers
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double sample_rate; // actual sample rate in use (in hz)
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int fd; // --ifile option file descriptor
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input_format_t input_format; // --iformat option
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uint16_t *maglut; // I/Q -> Magnitude lookup table
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uint16_t *log10lut; // Magnitude -> log10 lookup table
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int exit; // Exit from the main loop when true
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// Sample conversion
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int dc_filter; // should we apply a DC filter?
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iq_convert_fn converter_function;
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struct converter_state *converter_state;
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// RTLSDR
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char * dev_name;
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int gain;
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int enable_agc;
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rtlsdr_dev_t *dev;
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int freq;
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int ppm_error;
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// Networking
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char aneterr[ANET_ERR_LEN];
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struct net_service *services; // Active services
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struct client *clients; // Our clients
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struct net_writer raw_out; // Raw output
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struct net_writer beast_out; // Beast-format output
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struct net_writer sbs_out; // SBS-format output
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struct net_writer fatsv_out; // FATSV-format output
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#ifdef _WIN32
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WSADATA wsaData; // Windows socket initialisation
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#endif
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// Configuration
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char *filename; // Input form file, --ifile option
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int nfix_crc; // Number of crc bit error(s) to correct
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int check_crc; // Only display messages with good CRC
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int raw; // Raw output format
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int mode_ac; // Enable decoding of SSR Modes A & C
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int debug; // Debugging mode
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int net; // Enable networking
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int net_only; // Enable just networking
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uint64_t net_heartbeat_interval; // TCP heartbeat interval (milliseconds)
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int net_output_flush_size; // Minimum Size of output data
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uint64_t net_output_flush_interval; // Maximum interval (in milliseconds) between outputwrites
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char *net_output_raw_ports; // List of raw output TCP ports
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char *net_input_raw_ports; // List of raw input TCP ports
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char *net_output_sbs_ports; // List of SBS output TCP ports
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char *net_input_beast_ports; // List of Beast input TCP ports
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char *net_output_beast_ports; // List of Beast output TCP ports
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#ifdef ENABLE_WEBSERVER
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char *net_http_ports; // List of HTTP ports
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#endif
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char *net_bind_address; // Bind address
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int net_sndbuf_size; // TCP output buffer size (64Kb * 2^n)
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int net_verbatim; // if true, send the original message, not the CRC-corrected one
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int forward_mlat; // allow forwarding of mlat messages to output ports
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int quiet; // Suppress stdout
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uint32_t show_only; // Only show messages from this ICAO
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int interactive; // Interactive mode
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int interactive_rows; // Interactive mode: max number of rows
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uint64_t interactive_display_ttl;// Interactive mode: TTL display
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uint64_t stats; // Interval (millis) between stats dumps,
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int stats_range_histo; // Collect/show a range histogram?
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int onlyaddr; // Print only ICAO addresses
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int metric; // Use metric units
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int use_gnss; // Use GNSS altitudes with H suffix ("HAE", though it isn't always) when available
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int mlat; // Use Beast ascii format for raw data output, i.e. @...; iso *...;
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int interactive_rtl1090; // flight table in interactive mode is formatted like RTL1090
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char *json_dir; // Path to json base directory, or NULL not to write json.
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uint64_t json_interval; // Interval between rewriting the json aircraft file, in milliseconds; also the advertised map refresh interval
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char *html_dir; // Path to www base directory.
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int json_location_accuracy; // Accuracy of location metadata: 0=none, 1=approx, 2=exact
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int throttle; // When reading from a file, throttle file playback to realtime?
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int json_aircraft_history_next;
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struct {
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char *content;
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int clen;
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} json_aircraft_history[HISTORY_SIZE];
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// User details
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double fUserLat; // Users receiver/antenna lat/lon needed for initial surface location
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double fUserLon; // Users receiver/antenna lat/lon needed for initial surface location
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int bUserFlags; // Flags relating to the user details
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double maxRange; // Absolute maximum decoding range, in *metres*
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// State tracking
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struct aircraft *aircrafts;
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// Statistics
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struct stats stats_current;
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struct stats stats_alltime;
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struct stats stats_periodic;
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struct stats stats_1min[15];
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int stats_latest_1min;
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struct stats stats_5min;
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struct stats stats_15min;
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} Modes;
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// The struct we use to store information about a decoded message.
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struct modesMessage {
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// Generic fields
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unsigned char msg[MODES_LONG_MSG_BYTES]; // Binary message.
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unsigned char verbatim[MODES_LONG_MSG_BYTES]; // Binary message, as originally received before correction
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int msgbits; // Number of bits in message
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int msgtype; // Downlink format #
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uint32_t crc; // Message CRC
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int correctedbits; // No. of bits corrected
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uint32_t addr; // Address Announced
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addrtype_t addrtype; // address format / source
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uint64_t timestampMsg; // Timestamp of the message (12MHz clock)
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struct timespec sysTimestampMsg; // Timestamp of the message (system time)
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int remote; // If set this message is from a remote station
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double signalLevel; // RSSI, in the range [0..1], as a fraction of full-scale power
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int score; // Scoring from scoreModesMessage, if used
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datasource_t source; // Characterizes the overall message source
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// Raw data, just extracted directly from the message
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// The names reflect the field names in Annex 4
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unsigned IID; // extracted from CRC of DF11s
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unsigned AA;
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unsigned AC;
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unsigned CA;
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unsigned CC;
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unsigned CF;
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unsigned DR;
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unsigned FS;
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unsigned ID;
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unsigned KE;
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unsigned ND;
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unsigned RI;
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unsigned SL;
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unsigned UM;
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unsigned VS;
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unsigned char MB[7];
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unsigned char MD[10];
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unsigned char ME[7];
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unsigned char MV[7];
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// Decoded data
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unsigned altitude_valid : 1;
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unsigned heading_valid : 1;
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unsigned speed_valid : 1;
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unsigned vert_rate_valid : 1;
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unsigned squawk_valid : 1;
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unsigned callsign_valid : 1;
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unsigned ew_velocity_valid : 1;
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unsigned ns_velocity_valid : 1;
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unsigned cpr_valid : 1;
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unsigned cpr_odd : 1;
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unsigned cpr_decoded : 1;
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unsigned cpr_relative : 1;
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unsigned category_valid : 1;
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unsigned gnss_delta_valid : 1;
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unsigned from_mlat : 1;
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unsigned from_tisb : 1;
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unsigned spi_valid : 1;
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unsigned spi : 1;
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unsigned alert_valid : 1;
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unsigned alert : 1;
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unsigned metype; // DF17/18 ME type
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unsigned mesub; // DF17/18 ME subtype
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// valid if altitude_valid:
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int altitude; // Altitude in either feet or meters
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altitude_unit_t altitude_unit; // the unit used for altitude
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altitude_source_t altitude_source; // whether the altitude is a barometric altude or a GNSS height
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// valid if gnss_delta_valid:
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int gnss_delta; // difference between GNSS and baro alt
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// valid if heading_valid:
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unsigned heading; // Reported by aircraft, or computed from from EW and NS velocity
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heading_source_t heading_source; // what "heading" is measuring (true or magnetic heading)
|
|
// valid if speed_valid:
|
|
unsigned speed; // in kts, reported by aircraft, or computed from from EW and NS velocity
|
|
speed_source_t speed_source; // what "speed" is measuring (groundspeed / IAS / TAS)
|
|
// valid if vert_rate_valid:
|
|
int vert_rate; // vertical rate in feet/minute
|
|
altitude_source_t vert_rate_source; // the altitude source used for vert_rate
|
|
// valid if squawk_valid:
|
|
unsigned squawk; // 13 bits identity (Squawk), encoded as 4 hex digits
|
|
// valid if callsign_valid
|
|
char callsign[9]; // 8 chars flight number
|
|
// valid if category_valid
|
|
unsigned category; // A0 - D7 encoded as a single hex byte
|
|
// 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;
|
|
|
|
// 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 om_sda : 2;
|
|
|
|
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_nac_v : 3;
|
|
unsigned cc_nic_supp_c : 1;
|
|
unsigned cc_lw_valid : 1;
|
|
|
|
unsigned nic_supp_a : 1;
|
|
unsigned nac_p : 4;
|
|
unsigned gva : 2;
|
|
unsigned sil : 2;
|
|
unsigned nic_baro : 1;
|
|
|
|
sil_type_t sil_type;
|
|
enum { ANGLE_HEADING, ANGLE_TRACK } track_angle;
|
|
heading_source_t hrd;
|
|
|
|
unsigned cc_lw;
|
|
unsigned cc_antenna_offset;
|
|
} opstatus;
|
|
|
|
// Target State & Status (ADS-B V2 only)
|
|
struct {
|
|
unsigned valid : 1;
|
|
unsigned altitude_valid : 1;
|
|
unsigned baro_valid : 1;
|
|
unsigned heading_valid : 1;
|
|
unsigned mode_valid : 1;
|
|
unsigned mode_autopilot : 1;
|
|
unsigned mode_vnav : 1;
|
|
unsigned mode_alt_hold : 1;
|
|
unsigned mode_approach : 1;
|
|
unsigned acas_operational : 1;
|
|
unsigned nac_p : 4;
|
|
unsigned nic_baro : 1;
|
|
unsigned sil : 2;
|
|
|
|
sil_type_t sil_type;
|
|
enum { TSS_ALTITUDE_MCP, TSS_ALTITUDE_FMS } altitude_type;
|
|
unsigned altitude;
|
|
float baro;
|
|
unsigned heading;
|
|
} tss;
|
|
};
|
|
|
|
// This one needs modesMessage:
|
|
#include "track.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);
|
|
int ModeAToModeC (unsigned int ModeA);
|
|
|
|
//
|
|
// Functions exported from mode_s.c
|
|
//
|
|
int modesMessageLenByType(int type);
|
|
int scoreModesMessage(unsigned char *msg, int validbits);
|
|
int decodeModesMessage (struct modesMessage *mm, unsigned char *msg);
|
|
void displayModesMessage(struct modesMessage *mm);
|
|
void useModesMessage (struct modesMessage *mm);
|
|
//
|
|
// Functions exported from interactive.c
|
|
//
|
|
void interactiveShowData(void);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // __DUMP1090_H
|