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
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
|
/* tox_bootstrap_daemon.c
*
* Tox DHT bootstrap node daemon.
*
* Copyright (C) 2014 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox 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
* (at your option) any later version.
*
* Tox 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 Tox. If not, see <http://www.gnu.org/licenses/>.
*
*/
// system provided
#include <arpa/inet.h>
#include <syslog.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
// C
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// 3rd party
#include <libconfig.h>
// ./configure
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
// toxcore
#include "../../toxcore/LAN_discovery.h"
#include "../../toxcore/onion_announce.h"
#include "../../toxcore/TCP_server.h"
#include "../../toxcore/util.h"
// misc
#include "../bootstrap_node_packets.c"
#include "../../testing/misc_tools.c"
#define DAEMON_NAME "tox_bootstrap_daemon"
#define DAEMON_VERSION_NUMBER 2014051700UL // yyyymmmddvv format: yyyy year, mm month, dd day, vv version change count for that day
#define SLEEP_TIME_MILLISECONDS 30
#define sleep usleep(1000*SLEEP_TIME_MILLISECONDS)
#define DEFAULT_PID_FILE_PATH ".tox_bootstrap_daemon.pid"
#define DEFAULT_KEYS_FILE_PATH ".tox_bootstrap_daemon.keys"
#define DEFAULT_PORT 33445
#define DEFAULT_ENABLE_IPV6 0 // 1 - true, 0 - false
#define DEFAULT_ENABLE_LAN_DISCOVERY 1 // 1 - true, 0 - false
#define DEFAULT_ENABLE_TCP_RELAY 1 // 1 - true, 0 - false
#define DEFAULT_ENABLE_MOTD 1 // 1 - true, 0 - false
#define DEFAULT_MOTD DAEMON_NAME
#define MIN_ALLOWED_PORT 1
#define MAX_ALLOWED_PORT 65535
// Uses the already existing key or creates one if it didn't exist
//
// retirns 1 on success
// 0 on failure - no keys were read or stored
int manage_keys(DHT *dht, char *keys_file_path)
{
const uint32_t KEYS_SIZE = crypto_box_PUBLICKEYBYTES + crypto_box_SECRETKEYBYTES;
uint8_t keys[KEYS_SIZE];
FILE *keys_file;
// Check if file exits, proceed to open and load keys
keys_file = fopen(keys_file_path, "r");
if (keys_file != NULL) {
size_t read_size = fread(keys, sizeof(uint8_t), KEYS_SIZE, keys_file);
if (read_size != KEYS_SIZE) {
return 0;
}
memcpy(dht->self_public_key, keys, crypto_box_PUBLICKEYBYTES);
memcpy(dht->self_secret_key, keys + crypto_box_PUBLICKEYBYTES, crypto_box_SECRETKEYBYTES);
} else {
// Otherwise save new keys
memcpy(keys, dht->self_public_key, crypto_box_PUBLICKEYBYTES);
memcpy(keys + crypto_box_PUBLICKEYBYTES, dht->self_secret_key, crypto_box_SECRETKEYBYTES);
keys_file = fopen(keys_file_path, "w");
size_t write_size = fwrite(keys, sizeof(uint8_t), KEYS_SIZE, keys_file);
if (write_size != KEYS_SIZE) {
return 0;
}
}
fclose(keys_file);
return 1;
}
// Parses tcp relay ports from `cfg` and puts them into `tcp_relay_ports` array
//
// Supposed to be called from get_general_config only
//
// Important: iff `tcp_relay_port_count` > 0, then you are responsible for freeing `tcp_relay_ports`
void parse_tcp_relay_ports_config(config_t *cfg, uint16_t **tcp_relay_ports, int *tcp_relay_port_count)
{
const char *NAME_TCP_RELAY_PORTS = "tcp_relay_ports";
*tcp_relay_port_count = 0;
config_setting_t *ports_array = config_lookup(cfg, NAME_TCP_RELAY_PORTS);
if (ports_array == NULL) {
syslog(LOG_WARNING, "No '%s' setting in the configuration file.\n", NAME_TCP_RELAY_PORTS);
return;
}
if (config_setting_is_array(ports_array) == CONFIG_FALSE) {
syslog(LOG_WARNING, "'%s' setting should be an array. Array syntax: 'setting = [value1, value2, ...]'.\n", NAME_TCP_RELAY_PORTS);
return;
}
int config_port_count = config_setting_length(ports_array);
if (config_port_count == 0) {
syslog(LOG_WARNING, "'%s' is empty.\n", NAME_TCP_RELAY_PORTS);
return;
}
*tcp_relay_ports = malloc(config_port_count * sizeof(uint16_t));
config_setting_t *elem;
int i;
for (i = 0; i < config_port_count; i ++) {
elem = config_setting_get_elem(ports_array, i);
if (elem == NULL) {
// it's NULL if `ports_array` is not an array (we have that check ealier) or if `i` is out of range, which should not be
syslog(LOG_WARNING, "Port #%d: Something went wrong while parsing the port. Stopping reading ports.\n", i);
break;
}
if (config_setting_is_number(elem) == CONFIG_FALSE) {
syslog(LOG_WARNING, "Port #%d: Not a number. Skipping.\n", i);
continue;
}
(*tcp_relay_ports)[*tcp_relay_port_count] = config_setting_get_int(elem);
if ((*tcp_relay_ports)[*tcp_relay_port_count] < MIN_ALLOWED_PORT || (*tcp_relay_ports)[*tcp_relay_port_count] > MAX_ALLOWED_PORT) {
syslog(LOG_WARNING, "Port #%d: Invalid port: %u, should be in [%d, %d]. Skipping.\n", i, (*tcp_relay_ports)[*tcp_relay_port_count], MIN_ALLOWED_PORT, MAX_ALLOWED_PORT);
continue;
}
(*tcp_relay_port_count) ++;
}
// the loop above skips invalid ports, so we adjust the allocated memory size
*tcp_relay_ports = realloc(*tcp_relay_ports, (*tcp_relay_port_count) * sizeof(uint16_t));
}
// Gets general config options
//
// Important: you are responsible for freeing `pid_file_path` and `keys_file_path`
// also, iff `tcp_relay_ports_count` > 0, then you are responsible for freeing `tcp_relay_ports`
// and also `motd` iff `enable_motd` is set
//
// returns 1 on success
// 0 on failure, doesn't modify any data pointed by arguments
int get_general_config(char *cfg_file_path, char **pid_file_path, char **keys_file_path, int *port, int *enable_ipv6,
int *enable_lan_discovery, int *enable_tcp_relay, uint16_t **tcp_relay_ports, int *tcp_relay_port_count,
int *enable_motd, char **motd)
{
config_t cfg;
const char *NAME_PORT = "port";
const char *NAME_PID_FILE_PATH = "pid_file_path";
const char *NAME_KEYS_FILE_PATH = "keys_file_path";
const char *NAME_ENABLE_IPV6 = "enable_ipv6";
const char *NAME_ENABLE_LAN_DISCOVERY = "enable_lan_discovery";
const char *NAME_ENABLE_TCP_RELAY = "enable_tcp_relay";
const char *NAME_ENABLE_MOTD = "enable_motd";
const char *NAME_MOTD = "motd";
config_init(&cfg);
// Read the file. If there is an error, report it and exit.
if (config_read_file(&cfg, cfg_file_path) == CONFIG_FALSE) {
syslog(LOG_ERR, "%s:%d - %s\n", config_error_file(&cfg), config_error_line(&cfg), config_error_text(&cfg));
config_destroy(&cfg);
return 0;
}
// Get port
if (config_lookup_int(&cfg, NAME_PORT, port) == CONFIG_FALSE) {
syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_PORT);
syslog(LOG_WARNING, "Using default '%s': %d\n", NAME_PORT, DEFAULT_PORT);
*port = DEFAULT_PORT;
}
// Get PID file location
const char *tmp_pid_file;
if (config_lookup_string(&cfg, NAME_PID_FILE_PATH, &tmp_pid_file) == CONFIG_FALSE) {
syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_PID_FILE_PATH);
syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_PID_FILE_PATH, DEFAULT_PID_FILE_PATH);
tmp_pid_file = DEFAULT_PID_FILE_PATH;
}
*pid_file_path = malloc(strlen(tmp_pid_file) + 1);
strcpy(*pid_file_path, tmp_pid_file);
// Get keys file location
const char *tmp_keys_file;
if (config_lookup_string(&cfg, NAME_KEYS_FILE_PATH, &tmp_keys_file) == CONFIG_FALSE) {
syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_KEYS_FILE_PATH);
syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_KEYS_FILE_PATH, DEFAULT_KEYS_FILE_PATH);
tmp_keys_file = DEFAULT_KEYS_FILE_PATH;
}
*keys_file_path = malloc(strlen(tmp_keys_file) + 1);
strcpy(*keys_file_path, tmp_keys_file);
// Get IPv6 option
if (config_lookup_bool(&cfg, NAME_ENABLE_IPV6, enable_ipv6) == CONFIG_FALSE) {
syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_IPV6);
syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_IPV6, DEFAULT_ENABLE_IPV6 ? "true" : "false");
*enable_ipv6 = DEFAULT_ENABLE_IPV6;
}
// Get LAN discovery option
if (config_lookup_bool(&cfg, NAME_ENABLE_LAN_DISCOVERY, enable_lan_discovery) == CONFIG_FALSE) {
syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_LAN_DISCOVERY);
syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_LAN_DISCOVERY,
DEFAULT_ENABLE_LAN_DISCOVERY ? "true" : "false");
*enable_lan_discovery = DEFAULT_ENABLE_LAN_DISCOVERY;
}
// Get TCP relay option
if (config_lookup_bool(&cfg, NAME_ENABLE_TCP_RELAY, enable_tcp_relay) == CONFIG_FALSE) {
syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_TCP_RELAY);
syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_TCP_RELAY,
DEFAULT_ENABLE_TCP_RELAY ? "true" : "false");
*enable_tcp_relay = DEFAULT_ENABLE_TCP_RELAY;
}
if (*enable_tcp_relay) {
parse_tcp_relay_ports_config(&cfg, tcp_relay_ports, tcp_relay_port_count);
} else {
*tcp_relay_port_count = 0;
}
// Get MOTD option
if (config_lookup_bool(&cfg, NAME_ENABLE_MOTD, enable_motd) == CONFIG_FALSE) {
syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_MOTD);
syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_MOTD,
DEFAULT_ENABLE_MOTD ? "true" : "false");
*enable_motd = DEFAULT_ENABLE_MOTD;
}
if (*enable_motd) {
// Get MOTD
const char *tmp_motd;
if (config_lookup_string(&cfg, NAME_MOTD, &tmp_motd) == CONFIG_FALSE) {
syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_MOTD);
syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_MOTD, DEFAULT_MOTD);
tmp_motd = DEFAULT_MOTD;
}
size_t tmp_motd_length = strlen(tmp_motd) + 1;
size_t motd_length = tmp_motd_length > MAX_MOTD_LENGTH ? MAX_MOTD_LENGTH : tmp_motd_length;
*motd = malloc(motd_length);
strncpy(*motd, tmp_motd, motd_length);
(*motd)[motd_length - 1] = '\0';
}
config_destroy(&cfg);
syslog(LOG_DEBUG, "Successfully read:\n");
syslog(LOG_DEBUG, "'%s': %s\n", NAME_PID_FILE_PATH, *pid_file_path);
syslog(LOG_DEBUG, "'%s': %s\n", NAME_KEYS_FILE_PATH, *keys_file_path);
syslog(LOG_DEBUG, "'%s': %d\n", NAME_PORT, *port);
syslog(LOG_DEBUG, "'%s': %s\n", NAME_ENABLE_IPV6, *enable_ipv6 ? "true" : "false");
syslog(LOG_DEBUG, "'%s': %s\n", NAME_ENABLE_LAN_DISCOVERY, *enable_lan_discovery ? "true" : "false");
syslog(LOG_DEBUG, "'%s': %s\n", NAME_ENABLE_TCP_RELAY, *enable_tcp_relay ? "true" : "false");
// show info about tcp ports only if tcp relay is enabled
if (*enable_tcp_relay) {
if (*tcp_relay_port_count == 0) {
syslog(LOG_DEBUG, "No TCP ports could be read.\n");
} else {
syslog(LOG_DEBUG, "Read %d TCP ports:\n", *tcp_relay_port_count);
int i;
for (i = 0; i < *tcp_relay_port_count; i ++) {
syslog(LOG_DEBUG, "Port #%d: %u\n", i, (*tcp_relay_ports)[i]);
}
}
}
syslog(LOG_DEBUG, "'%s': %s\n", NAME_ENABLE_MOTD, *enable_motd ? "true" : "false");
if (*enable_motd) {
syslog(LOG_DEBUG, "'%s': %s\n", NAME_MOTD, *motd);
}
return 1;
}
// Bootstraps nodes listed in the config file
//
// returns 1 on success, some or no bootstrap nodes were added
// 0 on failure, a error accured while parsing config file
int bootstrap_from_config(char *cfg_file_path, DHT *dht, int enable_ipv6)
{
const char *NAME_BOOTSTRAP_NODES = "bootstrap_nodes";
const char *NAME_PUBLIC_KEY = "public_key";
const char *NAME_PORT = "port";
const char *NAME_ADDRESS = "address";
config_t cfg;
config_init(&cfg);
if (config_read_file(&cfg, cfg_file_path) == CONFIG_FALSE) {
syslog(LOG_ERR, "%s:%d - %s\n", config_error_file(&cfg), config_error_line(&cfg), config_error_text(&cfg));
config_destroy(&cfg);
return 0;
}
config_setting_t *node_list = config_lookup(&cfg, NAME_BOOTSTRAP_NODES);
if (node_list == NULL) {
syslog(LOG_WARNING, "No '%s' setting in the configuration file. Skipping bootstrapping.\n", NAME_BOOTSTRAP_NODES);
config_destroy(&cfg);
return 1;
}
if (config_setting_length(node_list) == 0) {
syslog(LOG_WARNING, "No bootstrap nodes found. Skipping bootstrapping.\n");
config_destroy(&cfg);
return 1;
}
int bs_port;
const char *bs_address;
const char *bs_public_key;
config_setting_t *node;
int i = 0;
while (config_setting_length(node_list)) {
node = config_setting_get_elem(node_list, 0);
if (node == NULL) {
config_destroy(&cfg);
return 0;
}
// Check that all settings are present
if (config_setting_lookup_string(node, NAME_PUBLIC_KEY, &bs_public_key) == CONFIG_FALSE) {
syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_PUBLIC_KEY);
goto next;
}
if (config_setting_lookup_int(node, NAME_PORT, &bs_port) == CONFIG_FALSE) {
syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_PORT);
goto next;
}
if (config_setting_lookup_string(node, NAME_ADDRESS, &bs_address) == CONFIG_FALSE) {
syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_ADDRESS);
goto next;
}
// Process settings
if (strlen(bs_public_key) != crypto_box_PUBLICKEYBYTES*2) {
syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %s. Skipping the node.\n", i, NAME_PUBLIC_KEY,
bs_public_key);
goto next;
}
if (bs_port < MIN_ALLOWED_PORT || bs_port > MAX_ALLOWED_PORT) {
syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %d, should be in [%d, %d]. Skipping the node.\n", i, NAME_PORT, bs_port, MIN_ALLOWED_PORT, MAX_ALLOWED_PORT);
goto next;
}
uint8_t *bs_public_key_bin = hex_string_to_bin((char *)bs_public_key);
const int address_resolved = DHT_bootstrap_from_address(dht, bs_address, enable_ipv6, htons(bs_port),
bs_public_key_bin);
free(bs_public_key_bin);
if (!address_resolved) {
syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %s. Skipping the node.\n", i, NAME_ADDRESS, bs_address);
goto next;
}
syslog(LOG_DEBUG, "Successfully added bootstrap node #%d: %s:%d %s\n", i, bs_address, bs_port, bs_public_key);
next:
// config_setting_lookup_string() allocates string inside and doesn't allow us to free it direcly
// though it's freed when the element is removed, so we free it right away in order to keep memory
// consumption minimal
config_setting_remove_elem(node_list, 0);
i++;
}
config_destroy(&cfg);
return 1;
}
// Prints public key
void print_public_key(uint8_t *public_key)
{
char buffer[2*crypto_box_PUBLICKEYBYTES + 1];
int index = 0;
int i;
for (i = 0; i < crypto_box_PUBLICKEYBYTES; i++) {
index += sprintf(buffer + index, "%02hhX", public_key[i]);
}
syslog(LOG_INFO, "Public Key: %s\n", buffer);
return;
}
int main(int argc, char *argv[])
{
openlog(DAEMON_NAME, LOG_NOWAIT | LOG_PID, LOG_DAEMON);
syslog(LOG_INFO, "Running \"%s\" version %lu.\n", DAEMON_NAME, DAEMON_VERSION_NUMBER);
if (argc < 2) {
syslog(LOG_ERR, "Please specify a path to a configuration file as the first argument. Exiting.\n");
return 1;
}
char *cfg_file_path = argv[1];
char *pid_file_path, *keys_file_path;
int port;
int enable_ipv6;
int enable_lan_discovery;
int enable_tcp_relay;
uint16_t *tcp_relay_ports;
int tcp_relay_port_count;
int enable_motd;
char *motd;
if (get_general_config(cfg_file_path, &pid_file_path, &keys_file_path, &port, &enable_ipv6, &enable_lan_discovery, &enable_tcp_relay, &tcp_relay_ports, &tcp_relay_port_count, &enable_motd, &motd)) {
syslog(LOG_DEBUG, "General config read successfully\n");
} else {
syslog(LOG_ERR, "Couldn't read config file: %s. Exiting.\n", cfg_file_path);
return 1;
}
if (port < MIN_ALLOWED_PORT || port > MAX_ALLOWED_PORT) {
syslog(LOG_ERR, "Invalid port: %d, should be in [%d, %d]. Exiting.\n", port, MIN_ALLOWED_PORT, MAX_ALLOWED_PORT);
return 1;
}
// Check if the PID file exists
if (fopen(pid_file_path, "r")) {
syslog(LOG_ERR, "Another instance of the daemon is already running, PID file %s exists.\n", pid_file_path);
}
IP ip;
ip_init(&ip, enable_ipv6);
DHT *dht = new_DHT(new_networking(ip, port));
if (dht == NULL) {
syslog(LOG_ERR, "Couldn't initialize Tox DHT instance. Exiting.\n");
return 1;
}
Onion *onion = new_onion(dht);
Onion_Announce *onion_a = new_onion_announce(dht);
if (!(onion && onion_a)) {
syslog(LOG_ERR, "Couldn't initialize Tox Onion. Exiting.\n");
return 1;
}
if (enable_motd) {
if (bootstrap_set_callbacks(dht->net, DAEMON_VERSION_NUMBER, (uint8_t*)motd, strlen(motd) + 1) == 0) {
syslog(LOG_DEBUG, "Set MOTD successfully.\n");
} else {
syslog(LOG_ERR, "Couldn't set MOTD: %s. Exiting.\n", motd);
return 1;
}
free(motd);
}
if (manage_keys(dht, keys_file_path)) {
syslog(LOG_DEBUG, "Keys are managed successfully.\n");
} else {
syslog(LOG_ERR, "Couldn't read/write: %s. Exiting.\n", keys_file_path);
return 1;
}
TCP_Server *tcp_server = NULL;
if (enable_tcp_relay) {
if (tcp_relay_port_count == 0) {
syslog(LOG_ERR, "No TCP relay ports read. Exiting.\n");
return 1;
}
tcp_server = new_TCP_server(enable_ipv6, tcp_relay_port_count, tcp_relay_ports, dht->self_public_key, dht->self_secret_key, onion);
// tcp_relay_port_count != 0 at this point
free(tcp_relay_ports);
if (tcp_server != NULL) {
syslog(LOG_DEBUG, "Initialized Tox TCP server successfully.\n");
} else {
syslog(LOG_ERR, "Couldn't initialize Tox TCP server. Exiting.\n");
return 1;
}
}
if (bootstrap_from_config(cfg_file_path, dht, enable_ipv6)) {
syslog(LOG_DEBUG, "List of bootstrap nodes read successfully.\n");
} else {
syslog(LOG_ERR, "Couldn't read list of bootstrap nodes in %s. Exiting.\n", cfg_file_path);
return 1;
}
print_public_key(dht->self_public_key);
// Write the PID file
FILE *pidf = fopen(pid_file_path, "a+");
if (pidf == NULL) {
syslog(LOG_ERR, "Couldn't open the PID file for writing: %s. Exiting.\n", pid_file_path);
return 1;
}
free(pid_file_path);
free(keys_file_path);
// Fork off from the parent process
pid_t pid = fork();
if (pid < 0) {
fclose(pidf);
syslog(LOG_ERR, "Forking failed. Exiting.\n");
return 1;
}
if (pid > 0) {
fprintf(pidf, "%d ", pid);
fclose(pidf);
syslog(LOG_DEBUG, "Forked successfully: PID: %d.\n", pid);
return 0;
}
// Change the file mode mask
umask(0);
// Create a new SID for the child process
if (setsid() < 0) {
syslog(LOG_ERR, "SID creation failure. Exiting.\n");
return 1;
}
// Change the current working directory
if ((chdir("/")) < 0) {
syslog(LOG_ERR, "Couldn't change working directory to '/'. Exiting.\n");
return 1;
}
// Go quiet
close(STDOUT_FILENO);
close(STDIN_FILENO);
close(STDERR_FILENO);
uint64_t last_LANdiscovery = 0;
uint16_t htons_port = htons(port);
int waiting_for_dht_connection = 1;
if (enable_lan_discovery) {
LANdiscovery_init(dht);
syslog(LOG_DEBUG, "Initialized LAN discovery.\n");
}
while (1) {
do_DHT(dht);
if (enable_lan_discovery && is_timeout(last_LANdiscovery, LAN_DISCOVERY_INTERVAL)) {
send_LANdiscovery(htons_port, dht);
last_LANdiscovery = unix_time();
}
if (enable_tcp_relay) {
do_TCP_server(tcp_server);
}
networking_poll(dht->net);
if (waiting_for_dht_connection && DHT_isconnected(dht)) {
syslog(LOG_DEBUG, "Connected to other bootstrap node successfully.\n");
waiting_for_dht_connection = 0;
}
sleep;
}
return 1;
}
|