99dd290352
This is a from-scratch reimplementation that should be functionally equivalent to the Flightaware version that was based on dump1090_mr and had its fingers deep in the network code. This version should be a little less invasive / fragile..
204 lines
8 KiB
C
204 lines
8 KiB
C
// Part of dump1090, a Mode S message decoder for RTLSDR devices.
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//
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// faup1090.c: cut down version that just does 30005 -> 10001 forwarding
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//
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// Copyright (c) 2014,2015 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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#include "dump1090.h"
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#include <stdarg.h>
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#include <endian.h>
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//
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// =============================== Initialization ===========================
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//
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static void faupInitConfig(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.nfix_crc = 1;
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Modes.check_crc = 1;
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Modes.net = 1;
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Modes.net_heartbeat_interval = MODES_NET_HEARTBEAT_INTERVAL;
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Modes.net_fatsv_port = MODES_NET_OUTPUT_FA_TSV_PORT;
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Modes.maxRange = 1852 * 300; // 300NM default max range
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Modes.quiet = 1;
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Modes.net_output_flush_size = MODES_OUT_FLUSH_SIZE;
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Modes.net_output_flush_interval = 200; // milliseconds
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}
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//
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//=========================================================================
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//
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static void faupInit(void) {
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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(1);
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icaoFilterInit();
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}
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//
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// ================================ Main ====================================
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//
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static void showHelp(void) {
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printf(
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"-----------------------------------------------------------------------------\n"
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"| faup1090 ModeS conversion %45s |\n"
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"-----------------------------------------------------------------------------\n"
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"--net-bind-address <ip> IP address to bind to (default: Any; Use 127.0.0.1 for private)\n"
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"--net-bo-ipaddr <addr> IP address to connect to for Beast data (default: 127.0.0.1)\n"
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"--net-bo-port <port> Port to connect for Beast data (default: 30005)\n"
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"--net-fatsv-port <port> FlightAware TSV output port (default: 10001)\n"
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"--lat <latitude> Reference/receiver latitude 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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"--help Show this help\n"
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"\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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// This function is called a few times every second by main in order to
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// perform tasks we need to do continuously, like accepting new clients
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// from the net, refreshing the screen in interactive mode, and so forth
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//
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static void backgroundTasks(void) {
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icaoFilterExpire();
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trackPeriodicUpdate();
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modesNetPeriodicWork();
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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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char *bo_connect_ipaddr = "127.0.0.1";
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int bo_connect_port = MODES_NET_OUTPUT_BEAST_PORT;
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struct client *c;
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struct net_service *s;
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// Set sane defaults
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faupInitConfig();
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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],"--net-bind-address") && more) {
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Modes.net_bind_address = strdup(argv[++j]);
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} else if (!strcmp(argv[j],"--net-fatsv-port") && more) {
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Modes.net_fatsv_port = atoi(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],"--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,
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"Unknown or not enough arguments for option '%s'.\n\n",
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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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// Initialization
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faupInit();
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modesInitNet();
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// Set up connection
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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,
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"faup1090: failed to connect to %s:%d (is dump1090 running?): %s\n",
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bo_connect_ipaddr, bo_connect_port, Modes.aneterr);
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exit (1);
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}
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// Run it until we've lost the connection.
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while (!Modes.exit && s->connections) {
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backgroundTasks();
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usleep(100000);
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}
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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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