// view1090, a Mode S messages viewer for dump1090 devices. // // Copyright (C) 2013 by Malcolm Robb // // 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. // #include "coaa.h" #include "view1090.h" // // ============================= Utility functions ========================== // void sigintHandler(int dummy) { NOTUSED(dummy); signal(SIGINT, SIG_DFL); // reset signal handler - bit extra safety Modes.exit = 1; // Signal to threads that we are done } // // =============================== Terminal handling ======================== // #ifndef _WIN32 // Get the number of rows after the terminal changes size. int getTermRows() { struct winsize w; ioctl(STDOUT_FILENO, TIOCGWINSZ, &w); return (w.ws_row); } // Handle resizing terminal void sigWinchCallback() { signal(SIGWINCH, SIG_IGN); Modes.interactive_rows = getTermRows(); interactiveShowData(); signal(SIGWINCH, sigWinchCallback); } #else int getTermRows() { return MODES_INTERACTIVE_ROWS;} #endif // // =============================== Initialization =========================== // void view1090InitConfig(void) { // Default everything to zero/NULL memset(&Modes, 0, sizeof(Modes)); memset(&View1090, 0, sizeof(View1090)); // Now initialise things that should not be 0/NULL to their defaults Modes.check_crc = 1; strcpy(View1090.net_input_beast_ipaddr,VIEW1090_NET_OUTPUT_IP_ADDRESS); Modes.net_input_beast_port = MODES_NET_OUTPUT_BEAST_PORT; Modes.interactive_rows = getTermRows(); Modes.interactive_delete_ttl = MODES_INTERACTIVE_DELETE_TTL; Modes.interactive_display_ttl = MODES_INTERACTIVE_DISPLAY_TTL; Modes.fUserLat = MODES_USER_LATITUDE_DFLT; Modes.fUserLon = MODES_USER_LONGITUDE_DFLT; Modes.interactive = 1; } // //========================================================================= // void view1090Init(void) { // Allocate the various buffers used by Modes if ( NULL == (Modes.icao_cache = (uint32_t *) malloc(sizeof(uint32_t) * MODES_ICAO_CACHE_LEN * 2))) { fprintf(stderr, "Out of memory allocating data buffer.\n"); exit(1); } // Clear the buffers that have just been allocated, just in-case memset(Modes.icao_cache, 0, sizeof(uint32_t) * MODES_ICAO_CACHE_LEN * 2); // Validate the users Lat/Lon home location inputs if ( (Modes.fUserLat > 90.0) // Latitude must be -90 to +90 || (Modes.fUserLat < -90.0) // and || (Modes.fUserLon > 360.0) // Longitude must be -180 to +360 || (Modes.fUserLon < -180.0) ) { Modes.fUserLat = Modes.fUserLon = 0.0; } else if (Modes.fUserLon > 180.0) { // If Longitude is +180 to +360, make it -180 to 0 Modes.fUserLon -= 360.0; } // If both Lat and Lon are 0.0 then the users location is either invalid/not-set, or (s)he's in the // Atlantic ocean off the west coast of Africa. This is unlikely to be correct. // Set the user LatLon valid flag only if either Lat or Lon are non zero. Note the Greenwich meridian // is at 0.0 Lon,so we must check for either fLat or fLon being non zero not both. // Testing the flag at runtime will be much quicker than ((fLon != 0.0) || (fLat != 0.0)) Modes.bUserFlags &= ~MODES_USER_LATLON_VALID; if ((Modes.fUserLat != 0.0) || (Modes.fUserLon != 0.0)) { Modes.bUserFlags |= MODES_USER_LATLON_VALID; } // Prepare error correction tables modesInitErrorInfo(); } // // ================================ Main ==================================== // void showHelp(void) { printf( "-----------------------------------------------------------------------------\n" "| view1090 dump1090 Viewer Ver : "MODES_DUMP1090_VERSION " |\n" "-----------------------------------------------------------------------------\n" "--interactive Interactive mode refreshing data on screen\n" "--interactive-rows Max number of rows in interactive mode (default: 15)\n" "--interactive-ttl Remove from list if idle for (default: 60)\n" "--interactive-rtl1090 Display flight table in RTL1090 format\n" "--modeac Enable decoding of SSR modes 3/A & 3/C\n" "--net-bo-ipaddr TCP Beast output listen IPv4 (default: 127.0.0.1)\n" "--net-bo-port TCP Beast output listen port (default: 30005)\n" "--lat Reference/receiver latitide for surface posn (opt)\n" "--lon Reference/receiver longitude for surface posn (opt)\n" "--no-crc-check Disable messages with broken CRC (discouraged)\n" "--no-fix Disable single-bits error correction using CRC\n" "--fix Enable single-bits error correction using CRC\n" "--aggressive More CPU for more messages (two bits fixes, ...)\n" "--metric Use metric units (meters, km/h, ...)\n" "--help Show this help\n" ); } // //========================================================================= // int main(int argc, char **argv) { int j, fd; struct client *c; // Set sane defaults view1090InitConfig(); signal(SIGINT, sigintHandler); // Define Ctrl/C handler (exit program) // Parse the command line options for (j = 1; j < argc; j++) { int more = ((j + 1) < argc); // There are more arguments if (!strcmp(argv[j],"--net-bo-port") && more) { Modes.net_input_beast_port = atoi(argv[++j]); } else if (!strcmp(argv[j],"--net-bo-ipaddr") && more) { strcpy(View1090.net_input_beast_ipaddr, argv[++j]); } else if (!strcmp(argv[j],"--modeac")) { Modes.mode_ac = 1; } else if (!strcmp(argv[j],"--interactive-rows") && more) { Modes.interactive_rows = atoi(argv[++j]); } else if (!strcmp(argv[j],"--interactive")) { Modes.interactive = 1; } else if (!strcmp(argv[j],"--interactive-ttl") && more) { Modes.interactive_display_ttl = atoi(argv[++j]); } else if (!strcmp(argv[j],"--interactive-rtl1090")) { Modes.interactive = 1; Modes.interactive_rtl1090 = 1; } else if (!strcmp(argv[j],"--lat") && more) { Modes.fUserLat = atof(argv[++j]); } else if (!strcmp(argv[j],"--lon") && more) { Modes.fUserLon = atof(argv[++j]); } else if (!strcmp(argv[j],"--metric")) { Modes.metric = 1; } else if (!strcmp(argv[j],"--no-crc-check")) { Modes.check_crc = 0; } else if (!strcmp(argv[j],"--fix")) { Modes.nfix_crc = 1; } else if (!strcmp(argv[j],"--no-fix")) { Modes.nfix_crc = 0; } else if (!strcmp(argv[j],"--aggressive")) { Modes.nfix_crc = MODES_MAX_BITERRORS; } else if (!strcmp(argv[j],"--help")) { showHelp(); exit(0); } else { fprintf(stderr, "Unknown or not enough arguments for option '%s'.\n\n", argv[j]); showHelp(); exit(1); } } #ifndef _WIN32 // Setup for SIGWINCH for handling lines if (Modes.interactive) {signal(SIGWINCH, sigWinchCallback);} #endif // Initialization view1090Init(); // Try to connect to the selected ip address and port. We only support *ONE* input connection which we initiate.here. if ((fd = anetTcpConnect(Modes.aneterr, View1090.net_input_beast_ipaddr, Modes.net_input_beast_port)) == ANET_ERR) { fprintf(stderr, "Failed to connect to %s:%d\n", View1090.net_input_beast_ipaddr, Modes.net_input_beast_port); exit(1); } // // Setup a service callback client structure for a beast binary input (from dump1090) // This is a bit dodgy under Windows. The fd parameter is a handle to the internet // socket on which we are receiving data. Under Linux, these seem to start at 0 and // count upwards. However, Windows uses "HANDLES" and these don't nececeriy start at 0. // dump1090 limits fd to values less than 1024, and then uses the fd parameter to // index into an array of clients. This is ok-ish if handles are allocated up from 0. // However, there is no gaurantee that Windows will behave like this, and if Windows // allocates a handle greater than 1024, then dump1090 won't like it. On my test machine, // the first Windows handle is usually in the 0x54 (84 decimal) region. if (fd >= MODES_NET_MAX_FD) { // Max number of clients reached fprintf(stderr, "Max number of clients exceeded : fd = 0x%X\n", fd); close(fd); exit(1); } c = (struct client *) malloc(sizeof(*c)); c->buflen = 0; c->fd = c->service = Modes.bis = fd; Modes.clients[fd] = c; if (Modes.maxfd < fd) { Modes.maxfd = fd; } // Keep going till the user does something that stops us while (!Modes.exit) { modesReadFromClient(c,"",decodeBinMessage); interactiveRemoveStaleAircrafts(); interactiveShowData(); } // The user has stopped us, so close any socket we opened if (fd != ANET_ERR) {close(fd);} pthread_exit(0); return (0); } // //========================================================================= //