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dump1090/view1090.c

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// view1090, a Mode S messages viewer for dump1090 devices.
//
// Copyright (C) 2014 by Malcolm Robb <Support@ATTAvionics.com>
//
// 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 "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) {
pthread_mutex_init(&Modes.pDF_mutex,NULL);
pthread_mutex_init(&Modes.data_mutex,NULL);
pthread_cond_init(&Modes.data_cond,NULL);
#ifdef _WIN32
if ( (!Modes.wsaData.wVersion)
&& (!Modes.wsaData.wHighVersion) ) {
// Try to start the windows socket support
if (WSAStartup(MAKEWORD(2,1),&Modes.wsaData) != 0)
{
fprintf(stderr, "WSAStartup returned Error\n");
}
}
#endif
// 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();
}
// Set up data connection
int setupConnection(struct client *c) {
int fd;
// 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) {
anetNonBlock(Modes.aneterr, fd);
//
// 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.
c->next = NULL;
c->buflen = 0;
c->fd =
c->service =
Modes.bis = fd;
Modes.clients = c;
}
return fd;
}
//
// ================================ Main ====================================
//
void showHelp(void) {
printf(
"-----------------------------------------------------------------------------\n"
"| view1090 ModeS Viewer %45s |\n"
"-----------------------------------------------------------------------------\n"
"--interactive Interactive mode refreshing data on screen\n"
"--interactive-rows <num> Max number of rows in interactive mode (default: 15)\n"
"--interactive-ttl <sec> Remove from list if idle for <sec> (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 <IPv4> TCP Beast output listen IPv4 (default: 127.0.0.1)\n"
"--net-bo-port <port> TCP Beast output listen port (default: 30005)\n"
"--lat <latitude> Reference/receiver latitide for surface posn (opt)\n"
"--lon <longitude> 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",
MODES_DUMP1090_VARIANT " " MODES_DUMP1090_VERSION
);
}
#ifdef _WIN32
void showCopyright(void) {
uint64_t llTime = time(NULL) + 1;
printf(
"-----------------------------------------------------------------------------\n"
"| view1090 ModeS Viewer Ver : " MODES_DUMP1090_VERSION " |\n"
"-----------------------------------------------------------------------------\n"
"\n"
" Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>\n"
" Copyright (C) 2014 by Malcolm Robb <support@attavionics.com>\n"
"\n"
" All rights reserved.\n"
"\n"
" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
" ""AS IS"" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
" A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n"
" HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
" LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
" OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
"\n"
" For further details refer to <https://github.com/MalcolmRobb/dump1090>\n"
"\n"
);
// delay for 1 second to give the user a chance to read the copyright
while (llTime >= time(NULL)) {}
}
#endif
//
//=========================================================================
//
int main(int argc, char **argv) {
int j, fd;
struct client *c;
char pk_buf[8];
// 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);
}
}
#ifdef _WIN32
// Try to comply with the Copyright license conditions for binary distribution
if (!Modes.quiet) {showCopyright();}
#define MSG_DONTWAIT 0
#endif
#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.
c = (struct client *) malloc(sizeof(*c));
if ((fd = setupConnection(c)) == ANET_ERR) {
fprintf(stderr, "Failed to connect to %s:%d\n", View1090.net_input_beast_ipaddr, Modes.net_input_beast_port);
exit(1);
}
// Keep going till the user does something that stops us
while (!Modes.exit) {
interactiveRemoveStaleAircrafts();
interactiveShowData();
if ((fd == ANET_ERR) || (recv(c->fd, pk_buf, sizeof(pk_buf), MSG_PEEK | MSG_DONTWAIT) == 0)) {
free(c);
usleep(1000000);
c = (struct client *) malloc(sizeof(*c));
fd = setupConnection(c);
continue;
}
modesReadFromClient(c,"",decodeBinMessage);
usleep(100000);
}
// The user has stopped us, so close any socket we opened
if (fd != ANET_ERR)
{close(fd);}
return (0);
}
//
//=========================================================================
//
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