414 lines
16 KiB
C
414 lines
16 KiB
C
// dump1090, a Mode S messages decoder for RTLSDR devices.
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//
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// Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>
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// Copyright (C) 2014 by FlightAware LLC
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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 "faup1090.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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//
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// =============================== Terminal handling ========================
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//
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#ifndef _WIN32
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// Get the number of rows after the terminal changes size.
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int getTermRows() {
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struct winsize w;
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
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return (w.ws_row);
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}
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// Handle resizing terminal
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void sigWinchCallback() {
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signal(SIGWINCH, SIG_IGN);
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Modes.interactive_rows = getTermRows();
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interactiveShowData();
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signal(SIGWINCH, sigWinchCallback);
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}
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#else
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int getTermRows() { return MODES_INTERACTIVE_ROWS;}
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#endif
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//
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// =============================== Initialization ===========================
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//
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void modesInitConfig(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.net = 1;
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Modes.quiet = 1;
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Modes.net_heartbeat_rate = MODES_NET_HEARTBEAT_RATE;
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Modes.net_input_beast_port = MODES_NET_OUTPUT_BEAST_PORT;
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Modes.net_fatsv_port = MODES_NET_OUTPUT_FA_TSV_PORT;
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Modes.interactive_rows = getTermRows();
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Modes.interactive_delete_ttl = MODES_INTERACTIVE_DELETE_TTL;
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Modes.interactive_display_ttl = MODES_INTERACTIVE_DISPLAY_TTL;
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Modes.fUserLat = MODES_USER_LATITUDE_DFLT;
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Modes.fUserLon = MODES_USER_LONGITUDE_DFLT;
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}
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void faupInitConfig(void) {
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memset(&faup1090, 0, sizeof(faup1090));
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strcpy (faup1090.net_input_beast_ipaddr, FAUP1090_NET_OUTPUT_IP_ADDRESS);
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}
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//
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//=========================================================================
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//
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void modesInit(void) {
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int i;
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// Allocate the various buffers used by Modes
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if ( ((Modes.icao_cache = (uint32_t *) malloc(sizeof(uint32_t) * MODES_ICAO_CACHE_LEN * 2) ) == NULL) ||
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((Modes.beastOut = (char *) malloc(MODES_RAWOUT_BUF_SIZE) ) == NULL) ||
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((Modes.rawOut = (char *) malloc(MODES_RAWOUT_BUF_SIZE) ) == NULL) )
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{
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fprintf(stderr, "Out of memory allocating data buffer.\n");
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exit(1);
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}
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// Clear the buffers that have just been allocated, just in-case
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memset(Modes.icao_cache, 0, sizeof(uint32_t) * MODES_ICAO_CACHE_LEN * 2);
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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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// Limit the maximum requested raw output size to less than one Ethernet Block
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if (Modes.net_output_raw_size > (MODES_RAWOUT_BUF_FLUSH))
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{Modes.net_output_raw_size = MODES_RAWOUT_BUF_FLUSH;}
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if (Modes.net_output_raw_rate > (MODES_RAWOUT_BUF_RATE))
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{Modes.net_output_raw_rate = MODES_RAWOUT_BUF_RATE;}
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if (Modes.net_sndbuf_size > (MODES_NET_SNDBUF_MAX))
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{Modes.net_sndbuf_size = MODES_NET_SNDBUF_MAX;}
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// Initialise the Block Timers to something half sensible
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ftime(&Modes.stSystemTimeBlk);
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for (i = 0; i < MODES_ASYNC_BUF_NUMBER; i++)
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{Modes.stSystemTimeRTL[i] = Modes.stSystemTimeBlk;}
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// Prepare error correction tables
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modesInitErrorInfo();
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}
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struct service {
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char *descr;
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int *socket;
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int port;
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int enabled;
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};
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#define FAUP_NET_SERVICES_NUM 1
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extern struct service services[FAUP_NET_SERVICES_NUM];
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void faupInitNet(void) {
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int j;
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struct service svc[FAUP_NET_SERVICES_NUM] = {
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// {"Raw TCP output", &Modes.ros, Modes.net_output_raw_port, 0},
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// {"Raw TCP input", &Modes.ris, Modes.net_input_raw_port, 0},
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// {"Beast TCP output", &Modes.bos, Modes.net_output_beast_port, 0},
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// {"Beast TCP input", &Modes.bis, Modes.net_input_beast_port, 0},
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// {"HTTP server", &Modes.https, Modes.net_http_port, 0},
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// {"Basestation TCP output", &Modes.sbsos, Modes.net_output_sbs_port, 0},
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{"FlightAware TSV output", &Modes.fatsvos, MODES_NET_OUTPUT_FA_TSV_PORT, 1}
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};
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memcpy(&services, &svc, sizeof(svc));//services = svc;
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Modes.clients = 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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for (j = 0; j < MODES_NET_SERVICES_NUM; j++) {
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services[j].enabled = (services[j].port != 0);
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if (services[j].enabled) {
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int s = anetTcpServer(Modes.aneterr, services[j].port, NULL);
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if (s == -1) {
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fprintf(stderr, "Error opening the listening port %d (%s): %s\n",
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services[j].port, services[j].descr, strerror(errno));
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exit(1);
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}
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anetNonBlock(Modes.aneterr, s);
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*services[j].socket = s;
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} else {
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if (Modes.debug & MODES_DEBUG_NET) printf("%s port is disabled\n", services[j].descr);
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}
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}
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#ifndef _WIN32
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signal(SIGPIPE, SIG_IGN);
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#endif
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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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"| dump1090 ModeS Receiver Ver : " MODES_DUMP1090_VERSION " |\n"
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"-----------------------------------------------------------------------------\n"
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"--interactive Interactive mode refreshing data on screen\n"
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"--interactive-rows <num> Max number of rows in interactive mode (default: 15)\n"
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"--interactive-ttl <sec> Remove from list if idle for <sec> (default: 60)\n"
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"--interactive-rtl1090 Display flight table in RTL1090 format\n"
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"--net-fatsv-port <port> FlightAware TSV output port (default: 10001)\n"
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"--net-bo-ipaddr <IPv4> TCP Beast output listen IPV4 address (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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"--net-heartbeat <rate> TCP heartbeat rate in seconds (default: 60 sec; 0 to disable)\n"
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"--no-crc-check Enable messages with broken CRC (discouraged)\n"
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"--net-buffer <n> TCP buffer size 64Kb * (2^n) (default: n=0, 64Kb)\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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"--debug <flags> Debug mode (verbose), see README for details\n"
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"--quiet Disable output to stdout. Use for daemon applications\n"
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"--help Show this help\n"
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"\n"
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"Debug mode flags: n = Log network debugging info\n"
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);
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}
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#ifdef _WIN32
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void showCopyright(void) {
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uint64_t llTime = time(NULL) + 1;
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printf(
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"-----------------------------------------------------------------------------\n"
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"| dump1090 ModeS Receiver Ver : " MODES_DUMP1090_VERSION " |\n"
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"-----------------------------------------------------------------------------\n"
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"\n"
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" Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>\n"
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" Copyright (C) 2014 by Malcolm Robb <support@attavionics.com>\n"
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" Copyright (C) 2014 by FlightAware LLC\n"
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"\n"
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" All rights reserved.\n"
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"\n"
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" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
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" ""AS IS"" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
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" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
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" A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n"
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" HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
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" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
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" LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
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" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
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" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
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" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
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" OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
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"\n"
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" For further details refer to <https://github.com/MalcolmRobb/dump1090>\n"
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"\n"
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);
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// delay for 1 second to give the user a chance to read the copyright
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while (llTime >= time(NULL)) {}
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}
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#endif
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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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void backgroundTasks(void) {
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if (Modes.net) {
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modesReadFromClients();
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showFlightsFATSV();
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}
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// If Modes.aircrafts is not NULL, remove any stale aircraft
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if (Modes.aircrafts) {
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interactiveRemoveStaleAircrafts();
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}
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// Refresh screen when in interactive mode
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if (Modes.interactive) {
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interactiveShowData();
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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, fd;
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struct client *c;
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// Set sane defaults
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modesInitConfig();
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faupInitConfig();
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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],"--no-crc-check")) {
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Modes.check_crc = 0;
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} else if (!strcmp(argv[j],"--net-heartbeat") && more) {
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Modes.net_heartbeat_rate = atoi(argv[++j]) * 15;
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} else if (!strcmp(argv[j],"--net-bo-ipaddr") && more) {
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strcpy (faup1090.net_input_beast_ipaddr, argv[++j]);
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} else if (!strcmp(argv[j],"--net-bo-port") && more) {
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Modes.net_input_beast_port = atoi(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],"--net-buffer") && more) {
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Modes.net_sndbuf_size = atoi(argv[++j]);
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} else if (!strcmp(argv[j],"--onlyaddr")) {
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Modes.onlyaddr = 1;
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} else if (!strcmp(argv[j],"--interactive")) {
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Modes.interactive = 1;
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} else if (!strcmp(argv[j],"--interactive-rows") && more) {
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Modes.interactive_rows = atoi(argv[++j]);
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} else if (!strcmp(argv[j],"--interactive-ttl") && more) {
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Modes.interactive_display_ttl = 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],"--debug") && more) {
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char *f = argv[++j];
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while(*f) {
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switch(*f) {
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case 'D': Modes.debug |= MODES_DEBUG_DEMOD; break;
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case 'd': Modes.debug |= MODES_DEBUG_DEMODERR; break;
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case 'C': Modes.debug |= MODES_DEBUG_GOODCRC; break;
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case 'c': Modes.debug |= MODES_DEBUG_BADCRC; break;
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case 'p': Modes.debug |= MODES_DEBUG_NOPREAMBLE; break;
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case 'n': Modes.debug |= MODES_DEBUG_NET; break;
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case 'j': Modes.debug |= MODES_DEBUG_JS; break;
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default:
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fprintf(stderr, "Unknown debugging flag: %c\n", *f);
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exit(1);
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break;
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}
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f++;
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}
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} else if (!strcmp(argv[j],"--stats")) {
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Modes.stats = 1;
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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 if (!strcmp(argv[j],"--quiet")) {
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Modes.quiet = 1;
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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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#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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#endif
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#ifndef _WIN32
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// Setup for SIGWINCH for handling lines
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if (Modes.interactive) {signal(SIGWINCH, sigWinchCallback);}
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#endif
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// Initialization
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modesInit();
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Modes.net_only = 1;
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faupInitNet();
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if ((fd = anetTcpConnect (Modes.aneterr, faup1090.net_input_beast_ipaddr, Modes.net_input_beast_port)) == ANET_ERR) {
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fprintf (stderr, "faup1090: failed to connect to %s:%d (is dump1090 running?)\n", faup1090.net_input_beast_ipaddr, Modes.net_input_beast_port);
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exit (1);
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}
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c = (struct client *) malloc(sizeof(*c));
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c->next = NULL;
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c->buflen = 0;
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c->fd =
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c->service =
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Modes.bis = fd;
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Modes.clients = c;
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while (Modes.net_only) {
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if (Modes.exit) exit(0); // If we exit net_only nothing further in main()
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backgroundTasks();
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usleep(100000);
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}
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while (Modes.exit == 0) {
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backgroundTasks();
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}
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#ifndef _WIN32
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pthread_exit(0);
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#else
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return (0);
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#endif
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}
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//
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//=========================================================================
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//
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// vim: set ts=4 sw=4 sts=4 expandtab :
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