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viewadsb.c
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viewadsb.c
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// Part of readsb, a Mode-S/ADSB/TIS message decoder.
//
// view1090, a messages viewer for readsb backend.
//
// Copyright (c) 2020 Michael Wolf <michael@mictronics.de>
//
// This code is based on a detached fork of dump1090-fa.
//
// This file is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// This file is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// This file incorporates work covered by the following copyright and
// license:
//
// 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.
//
#define VIEWADSB
#include "readsb.h"
#include "help.h"
struct _Modes Modes;
#define verstring(x) _stringize(x)
static error_t parse_opt(int key, char *arg, struct argp_state *state);
const char *argp_program_version = verstring(MODES_READSB_VARIANT " " MODES_READSB_VERSION);
const char doc[] = "readsb Mode-S/ADSB/TIS viewer - "
verstring(MODES_READSB_VARIANT " " MODES_READSB_VERSION);
#undef _stringize
#undef verstring
const char args_doc[] = "";
static struct argp argp = {options, parse_opt, args_doc, doc, NULL, NULL, NULL};
char *bo_connect_ipaddr = "127.0.0.1";
char *bo_connect_port = "30005";
//
// ============================= Utility functions ==========================
//
static void sigintHandler(int dummy) {
MODES_NOTUSED(dummy);
signal(SIGINT, SIG_DFL); // reset signal handler - bit extra safety
Modes.exit = 1; // Signal to threads that we are done
}
void receiverPositionChanged(float lat, float lon, float alt) {
/* nothing */
(void) lat;
(void) lon;
(void) alt;
}
//
// =============================== Initialization ===========================
//
static void view1090InitConfig(void) {
// Default everything to zero/NULL
memset(&Modes, 0, sizeof (Modes));
// Now initialise things that should not be 0/NULL to their defaults
Modes.check_crc = 1;
Modes.interactive_display_ttl = MODES_INTERACTIVE_DISPLAY_TTL;
Modes.interactive = 1;
Modes.maxRange = 1852 * 300; // 300NM default max range
Modes.net_connector_delay = 1 * 1000;
}
//
//=========================================================================
//
static void view1090Init(void) {
// Validate the users Lat/Lon home location inputs
if ((Modes.receiver.latitude > 90.0) // Latitude must be -90 to +90
|| (Modes.receiver.latitude < -90.0) // and
|| (Modes.receiver.longitude > 360.0) // Longitude must be -180 to +360
|| (Modes.receiver.longitude < -180.0)) {
Modes.receiver.latitude = Modes.receiver.longitude = 0.0;
} else if (Modes.receiver.longitude > 180.0) { // If Longitude is +180 to +360, make it -180 to 0
Modes.receiver.longitude -= 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.receiver.latitude != 0.0) || (Modes.receiver.longitude != 0.0)) {
Modes.bUserFlags |= MODES_USER_LATLON_VALID;
}
// Prepare error correction tables
modesChecksumInit(Modes.nfix_crc);
icaoFilterInit();
modeACInit();
interactiveInit();
}
static error_t parse_opt(int key, char *arg, struct argp_state *state) {
switch (key) {
case OptFix:
Modes.nfix_crc = 1;
break;
case OptNoFix:
Modes.nfix_crc = 0;
break;
case OptNoCrcCheck:
Modes.check_crc = 0;
break;
case OptModeAc:
Modes.mode_ac = 1;
Modes.mode_ac_auto = 0;
break;
case OptShowOnly:
Modes.show_only = (uint32_t) strtoul(arg, NULL, 16);
Modes.interactive = 0;
break;
case OptMetric:
Modes.metric = 1;
break;
case OptAggressive:
Modes.nfix_crc = MODES_MAX_BITERRORS;
break;
case OptNoInteractive:
Modes.interactive = 0;
break;
case OptInteractiveTTL:
Modes.interactive_display_ttl = (uint64_t) (1000 * atof(arg));
break;
case OptLat:
Modes.receiver.latitude = atof(arg);
break;
case OptLon:
Modes.receiver.longitude = atof(arg);
break;
case OptMaxRange:
Modes.maxRange = atof(arg) * 1852.0; // convert to metres
break;
case OptNetBoPorts:
bo_connect_port = arg;
break;
case OptNetBindAddr:
bo_connect_ipaddr = arg;
break;
case ARGP_KEY_END:
if (state->arg_num > 0)
/* We use only options but no arguments */
argp_usage(state);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
//
//=========================================================================
//
int main(int argc, char **argv) {
struct net_service *s;
struct net_connector *con = calloc(1, sizeof (struct net_connector));
// Set sane defaults
view1090InitConfig();
signal(SIGINT, sigintHandler); // Define Ctrl/C handler (exit program)
// Parse the command line options
if (argp_parse(&argp, argc, argv, 0, 0, 0)) {
goto exit;
}
// We need only one service here created below, no need to call modesInitNet
Modes.services = NULL;
// Try to connect to the selected ip address and port. We only support *ONE* input connection which we initiate.here.
s = makeBeastInputService();
con->address = bo_connect_ipaddr;
con->port = bo_connect_port;
con->service = s;
con->mutex = malloc(sizeof (pthread_mutex_t));
if (!con->mutex || pthread_mutex_init(con->mutex, NULL)) {
fprintf(stderr, "Unable to initialize connector mutex!\n");
exit(1);
}
pthread_mutex_lock(con->mutex);
serviceConnect(con);
uint64_t timeout = mstime() + 10 * 1000;
int counter = 0;
while (!con->connected && timeout > mstime() && counter < 8) {
struct timespec slp = {0, 100 * 1000 * 1000};
//slp.tv_nsec = 100 * 1000 * 1000;
nanosleep(&slp, NULL);
if (con->connecting) {
// Check to see...
checkServiceConnected(con);
} else {
if (con->next_reconnect <= mstime()) {
counter++;
serviceConnect(con);
}
}
}
if (!con->connected) {
fprintf(stderr, "Failed to connect to %s:%s: timed out or maximum tries reached!\n", bo_connect_ipaddr, bo_connect_port);
exit(1);
}
sendBeastSettings(con->fd, "Cd"); // Beast binary format, no filters
sendBeastSettings(con->fd, Modes.mode_ac ? "J" : "j"); // Mode A/C on or off
sendBeastSettings(con->fd, Modes.check_crc ? "f" : "F"); // CRC checks on or off
// Initialization
view1090Init();
// Keep going till the user does something that stops us
while (!Modes.exit) {
struct timespec r = {0, 100 * 1000 * 1000};
icaoFilterExpire();
trackPeriodicUpdate();
modesNetPeriodicWork();
if (Modes.interactive)
interactiveShowData();
if (s->connections == 0) {
// lost input connection, try to reconnect
sleep(1);
serviceConnect(con);
continue;
}
nanosleep(&r, NULL);
}
/* Go through tracked aircraft chain and free up any used memory */
for (int j = 0; j < AIRCRAFTS_BUCKETS; j++) {
struct aircraft *a = Modes.aircrafts[j], *n;
while (a) {
n = a->next;
if (a) free(a);
a = n;
}
}
// Free local service and client
if (s) free(s);
if (con->addr_info) {
freeaddrinfo(con->addr_info);
con->addr_info = NULL;
}
pthread_mutex_unlock(con->mutex);
pthread_mutex_destroy(con->mutex);
free(con->mutex);
free(con);
exit:
interactiveCleanup();
return (0);
}
//
//=========================================================================
//