forked from flightaware/dump1090
-
Notifications
You must be signed in to change notification settings - Fork 0
/
view1090.c
250 lines (225 loc) · 9.4 KB
/
view1090.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
// view1090, a Mode S messages viewer for dump1090 devices.
//
// Copyright (C) 2014 by Malcolm Robb <[email protected]>
//
// 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 "dump1090.h"
struct _Modes Modes;
//
// ============================= 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
}
//
//=========================================================================
//
static void view1090Init(void) {
#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
// 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
modesChecksumInit(Modes.nfix_crc);
icaoFilterInit();
modeACInit();
}
//
// ================================ Main ====================================
//
static void showHelp(void) {
printf(
"-----------------------------------------------------------------------------\n"
"| view1090 ModeS Viewer %45s |\n"
"-----------------------------------------------------------------------------\n"
"--no-interactive Disable interactive mode, print messages to stdout\n"
"--interactive-ttl <sec> Remove from list if idle for <sec> (default: 60)\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"
"--max-range <distance> Absolute maximum range for position decoding (in nm, default: 300)\n"
"--no-crc-check Disable messages with broken CRC (discouraged)\n"
"--fix Enable single-bits error correction using CRC\n"
" (specify twice for two-bit error correction)\n"
"--no-fix Disable error correction using CRC\n"
"--metric Use metric units (meters, km/h, ...)\n"
"--show-only <addr> Show only messages from the given ICAO on stdout\n"
"--help Show this help\n",
MODES_DUMP1090_VARIANT " " MODES_DUMP1090_VERSION
);
}
static void sendSettings(struct client *c)
{
sendBeastSettings(c, "CdV"); // Beast binary format, no filters, verbatim mode on
sendBeastSettings(c, Modes.mode_ac ? "J" : "j"); // Mode A/C on or off
sendBeastSettings(c, Modes.check_crc ? "f" : "F"); // CRC checks on or off
}
//
//=========================================================================
//
int main(int argc, char **argv) {
int j;
struct client *c;
struct net_service *s;
char *bo_connect_ipaddr = "127.0.0.1";
int bo_connect_port = 30005;
// 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) {
bo_connect_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-bo-ipaddr") && more) {
bo_connect_ipaddr = argv[++j];
} else if (!strcmp(argv[j],"--modeac")) {
Modes.mode_ac = 1;
} else if (!strcmp(argv[j],"--no-interactive")) {
Modes.interactive = 0;
} else if (!strcmp(argv[j],"--show-only") && more) {
Modes.show_only = (uint32_t) strtoul(argv[++j], NULL, 16);
Modes.interactive = 0;
} else if (!strcmp(argv[j],"--interactive-ttl") && more) {
Modes.interactive_display_ttl = (uint64_t)(1000 * atof(argv[++j]));
} 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;
} else if (!strcmp(argv[j],"--no-fix")) {
Modes.nfix_crc = 0;
} else if (!strcmp(argv[j],"--max-range") && more) {
Modes.maxRange = atof(argv[++j]) * 1852.0; // convert to metres
} 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
if (Modes.nfix_crc > MODES_MAX_BITERRORS)
Modes.nfix_crc = MODES_MAX_BITERRORS;
// Initialization
view1090Init();
modesInitNet();
// Try to connect to the selected ip address and port. We only support *ONE* input connection which we initiate.here.
s = makeBeastInputService();
c = serviceConnect(s, bo_connect_ipaddr, bo_connect_port);
if (!c) {
interactiveCleanup();
fprintf(stderr, "Failed to connect to %s:%d: %s\n", bo_connect_ipaddr, bo_connect_port, Modes.aneterr);
exit(1);
}
sendSettings(c);
// Keep going till the user does something that stops us
interactiveInit();
while (!Modes.exit) {
struct timespec r = { 0, 100 * 1000 * 1000};
icaoFilterExpire();
trackPeriodicUpdate();
modesNetPeriodicWork();
interactiveShowData();
if (s->connections == 0) {
if (!Modes.interactive)
break;
// lost input connection, try to reconnect
interactiveNoConnection();
sleep(1);
c = serviceConnect(s, bo_connect_ipaddr, bo_connect_port);
if (c) {
sendSettings(c);
}
continue;
}
nanosleep(&r, NULL);
}
interactiveCleanup();
return (0);
}
//
//=========================================================================
//