234 lines
9 KiB
C
234 lines
9 KiB
C
// view1090, a Mode S messages viewer for dump1090 devices.
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//
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// Copyright (C) 2014 by Malcolm Robb <Support@ATTAvionics.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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//
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#include "dump1090.h"
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//
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// ============================= Utility functions ==========================
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//
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void sigintHandler(int dummy) {
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MODES_NOTUSED(dummy);
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signal(SIGINT, SIG_DFL); // reset signal handler - bit extra safety
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Modes.exit = 1; // Signal to threads that we are done
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}
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void receiverPositionChanged(float lat, float lon, float alt)
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{
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/* nothing */
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(void) lat;
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(void) lon;
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(void) alt;
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}
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//
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// =============================== Initialization ===========================
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//
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void view1090InitConfig(void) {
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// Default everything to zero/NULL
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memset(&Modes, 0, sizeof(Modes));
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// Now initialise things that should not be 0/NULL to their defaults
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Modes.check_crc = 1;
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Modes.interactive_display_ttl = MODES_INTERACTIVE_DISPLAY_TTL;
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Modes.interactive = 1;
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Modes.maxRange = 1852 * 300; // 300NM default max range
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}
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//
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//=========================================================================
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//
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void view1090Init(void) {
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pthread_mutex_init(&Modes.data_mutex,NULL);
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pthread_cond_init(&Modes.data_cond,NULL);
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#ifdef _WIN32
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if ( (!Modes.wsaData.wVersion)
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&& (!Modes.wsaData.wHighVersion) ) {
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// Try to start the windows socket support
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if (WSAStartup(MAKEWORD(2,1),&Modes.wsaData) != 0)
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{
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fprintf(stderr, "WSAStartup returned Error\n");
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}
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}
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#endif
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// Validate the users Lat/Lon home location inputs
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if ( (Modes.fUserLat > 90.0) // Latitude must be -90 to +90
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|| (Modes.fUserLat < -90.0) // and
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|| (Modes.fUserLon > 360.0) // Longitude must be -180 to +360
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|| (Modes.fUserLon < -180.0) ) {
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Modes.fUserLat = Modes.fUserLon = 0.0;
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} else if (Modes.fUserLon > 180.0) { // If Longitude is +180 to +360, make it -180 to 0
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Modes.fUserLon -= 360.0;
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}
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// If both Lat and Lon are 0.0 then the users location is either invalid/not-set, or (s)he's in the
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// Atlantic ocean off the west coast of Africa. This is unlikely to be correct.
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// Set the user LatLon valid flag only if either Lat or Lon are non zero. Note the Greenwich meridian
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// is at 0.0 Lon,so we must check for either fLat or fLon being non zero not both.
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// Testing the flag at runtime will be much quicker than ((fLon != 0.0) || (fLat != 0.0))
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Modes.bUserFlags &= ~MODES_USER_LATLON_VALID;
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if ((Modes.fUserLat != 0.0) || (Modes.fUserLon != 0.0)) {
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Modes.bUserFlags |= MODES_USER_LATLON_VALID;
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}
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// Prepare error correction tables
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modesChecksumInit(Modes.nfix_crc);
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icaoFilterInit();
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modeACInit();
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interactiveInit();
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}
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//
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// ================================ Main ====================================
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//
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void showHelp(void) {
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printf(
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"-----------------------------------------------------------------------------\n"
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"| view1090 ModeS Viewer %45s |\n"
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"-----------------------------------------------------------------------------\n"
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"--no-interactive Disable interactive mode, print messages to stdout\n"
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"--interactive-ttl <sec> Remove from list if idle for <sec> (default: 60)\n"
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"--modeac Enable decoding of SSR modes 3/A & 3/C\n"
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"--net-bo-ipaddr <IPv4> TCP Beast output listen IPv4 (default: 127.0.0.1)\n"
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"--net-bo-port <port> TCP Beast output listen port (default: 30005)\n"
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"--lat <latitude> Reference/receiver latitide for surface posn (opt)\n"
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"--lon <longitude> Reference/receiver longitude for surface posn (opt)\n"
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"--max-range <distance> Absolute maximum range for position decoding (in nm, default: 300)\n"
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"--no-crc-check Disable messages with broken CRC (discouraged)\n"
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"--no-fix Disable single-bits error correction using CRC\n"
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"--fix Enable single-bits error correction using CRC\n"
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"--aggressive More CPU for more messages (two bits fixes, ...)\n"
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"--metric Use metric units (meters, km/h, ...)\n"
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"--show-only <addr> Show only messages from the given ICAO on stdout\n"
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"--help Show this help\n",
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MODES_DUMP1090_VARIANT " " MODES_DUMP1090_VERSION
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);
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}
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//
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//=========================================================================
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//
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int main(int argc, char **argv) {
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int j;
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struct client *c;
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struct net_service *s;
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char *bo_connect_ipaddr = "127.0.0.1";
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int bo_connect_port = 30005;
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// Set sane defaults
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view1090InitConfig();
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signal(SIGINT, sigintHandler); // Define Ctrl/C handler (exit program)
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// Parse the command line options
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for (j = 1; j < argc; j++) {
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int more = ((j + 1) < argc); // There are more arguments
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if (!strcmp(argv[j],"--net-bo-port") && more) {
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bo_connect_port = atoi(argv[++j]);
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} else if (!strcmp(argv[j],"--net-bo-ipaddr") && more) {
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bo_connect_ipaddr = argv[++j];
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} else if (!strcmp(argv[j],"--modeac")) {
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Modes.mode_ac = 1;
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} else if (!strcmp(argv[j],"--no-interactive")) {
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Modes.interactive = 0;
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} else if (!strcmp(argv[j],"--show-only") && more) {
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Modes.show_only = (uint32_t) strtoul(argv[++j], NULL, 16);
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Modes.interactive = 0;
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} else if (!strcmp(argv[j],"--interactive-ttl") && more) {
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Modes.interactive_display_ttl = (uint64_t)(1000 * atof(argv[++j]));
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} else if (!strcmp(argv[j],"--lat") && more) {
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Modes.fUserLat = atof(argv[++j]);
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} else if (!strcmp(argv[j],"--lon") && more) {
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Modes.fUserLon = atof(argv[++j]);
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} else if (!strcmp(argv[j],"--metric")) {
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Modes.metric = 1;
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} else if (!strcmp(argv[j],"--no-crc-check")) {
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Modes.check_crc = 0;
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} else if (!strcmp(argv[j],"--fix")) {
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Modes.nfix_crc = 1;
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} else if (!strcmp(argv[j],"--no-fix")) {
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Modes.nfix_crc = 0;
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} else if (!strcmp(argv[j],"--aggressive")) {
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Modes.nfix_crc = MODES_MAX_BITERRORS;
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} else if (!strcmp(argv[j],"--max-range") && more) {
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Modes.maxRange = atof(argv[++j]) * 1852.0; // convert to metres
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} else if (!strcmp(argv[j],"--help")) {
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showHelp();
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exit(0);
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} else {
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fprintf(stderr, "Unknown or not enough arguments for option '%s'.\n\n", argv[j]);
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showHelp();
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exit(1);
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}
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}
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#ifdef _WIN32
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// Try to comply with the Copyright license conditions for binary distribution
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if (!Modes.quiet) {showCopyright();}
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#define MSG_DONTWAIT 0
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#endif
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// Initialization
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view1090Init();
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modesInitNet();
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// Try to connect to the selected ip address and port. We only support *ONE* input connection which we initiate.here.
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s = makeBeastInputService();
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c = serviceConnect(s, bo_connect_ipaddr, bo_connect_port);
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if (!c) {
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fprintf(stderr, "Failed to connect to %s:%d: %s\n", bo_connect_ipaddr, bo_connect_port, Modes.aneterr);
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exit(1);
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}
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// Keep going till the user does something that stops us
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while (!Modes.exit) {
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icaoFilterExpire();
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trackPeriodicUpdate();
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modesNetPeriodicWork();
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if (Modes.interactive)
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interactiveShowData();
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if (s->connections == 0) {
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// lost input connection, try to reconnect
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usleep(1000000);
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c = serviceConnect(s, bo_connect_ipaddr, bo_connect_port);
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continue;
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}
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usleep(100000);
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}
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interactiveCleanup();
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return (0);
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}
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//
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//=========================================================================
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//
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