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root/svn/ircd-hybrid/trunk/src/ircd.c
Revision: 6642
Committed: Sat Oct 24 18:41:32 2015 UTC (9 years, 10 months ago) by michael
Content type: text/x-csrc
File size: 15604 byte(s)
Log Message:
- Rename event::enabled to event::active

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2015 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19 * USA
20 */
21
22 /*! \file ircd.c
23 * \brief Starts up and runs the ircd.
24 * \version $Id$
25 */
26
27 #include "stdinc.h"
28 #include "user.h"
29 #include "list.h"
30 #include "ircd.h"
31 #include "channel.h"
32 #include "client.h"
33 #include "event.h"
34 #include "fdlist.h"
35 #include "hash.h"
36 #include "id.h"
37 #include "irc_string.h"
38 #include "ircd_signal.h"
39 #include "motd.h"
40 #include "conf.h"
41 #include "hostmask.h"
42 #include "parse.h"
43 #include "res.h"
44 #include "restart.h"
45 #include "rng_mt.h"
46 #include "auth.h"
47 #include "s_bsd.h"
48 #include "log.h"
49 #include "server.h"
50 #include "send.h"
51 #include "whowas.h"
52 #include "modules.h"
53 #include "memory.h"
54 #include "mempool.h"
55 #include "ircd_getopt.h"
56 #include "watch.h"
57 #include "conf_db.h"
58 #include "conf_class.h"
59 #include "ipcache.h"
60 #include "isupport.h"
61 #include "userhost.h"
62
63
64 #ifdef HAVE_LIBGEOIP
65 GeoIP *geoip_ctx;
66 #endif
67
68 struct SetOptions GlobalSetOptions; /* /quote set variables */
69 struct Counter Count;
70 struct ServerState_t server_state;
71 struct ServerStatistics ServerStats;
72 struct timeval SystemTime;
73 struct Connection meConnection; /* That's also part of me */
74 struct Client me = { .connection = &meConnection }; /* That's me */
75
76 char **myargv;
77 const char *logFileName = LPATH;
78 const char *pidFileName = PPATH;
79
80 unsigned int dorehash;
81 unsigned int doremotd;
82
83 static struct event event_cleanup_tklines =
84 {
85 .name = "cleanup_tklines",
86 .handler = cleanup_tklines,
87 .when = CLEANUP_TKLINES_TIME
88 };
89
90 static struct event event_try_connections =
91 {
92 .name = "try_connections",
93 .handler = try_connections,
94 .when = STARTUP_CONNECTIONS_TIME
95 };
96
97 static struct event event_comm_checktimeouts =
98 {
99 .name = "comm_checktimeouts",
100 .handler = comm_checktimeouts,
101 .when = 1
102 };
103
104 static struct event event_save_all_databases =
105 {
106 .name = "save_all_databases",
107 .handler = save_all_databases,
108 .when = DATABASE_UPDATE_TIMEOUT
109 };
110
111 struct event event_write_links_file =
112 {
113 .name = "write_links_file",
114 .handler = write_links_file,
115 };
116
117
118 /*
119 * print_startup - print startup information
120 */
121 static void
122 print_startup(int pid)
123 {
124 printf("ircd: version %s(%s)\n", ircd_version, serno);
125 printf("ircd: pid %d\n", pid);
126 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
127 : "foreground", ConfigGeneral.dpath);
128 }
129
130 static void
131 make_daemon(void)
132 {
133 int pid;
134
135 if ((pid = fork()) < 0)
136 {
137 perror("fork");
138 exit(EXIT_FAILURE);
139 }
140 else if (pid > 0)
141 {
142 print_startup(pid);
143 exit(EXIT_SUCCESS);
144 }
145
146 setsid();
147 }
148
149 static int printVersion;
150
151 static struct lgetopt myopts[] =
152 {
153 { "configfile", &ConfigGeneral.configfile,
154 STRING, "File to use for ircd.conf" },
155 { "klinefile", &ConfigGeneral.klinefile,
156 STRING, "File to use for kline database" },
157 { "dlinefile", &ConfigGeneral.dlinefile,
158 STRING, "File to use for dline database" },
159 { "xlinefile", &ConfigGeneral.xlinefile,
160 STRING, "File to use for xline database" },
161 { "resvfile", &ConfigGeneral.resvfile,
162 STRING, "File to use for resv database" },
163 { "logfile", &logFileName,
164 STRING, "File to use for ircd.log" },
165 { "pidfile", &pidFileName,
166 STRING, "File to use for process ID" },
167 { "foreground", &server_state.foreground,
168 YESNO, "Run in foreground (don't detach)" },
169 { "version", &printVersion,
170 YESNO, "Print version and exit" },
171 { "help", NULL, USAGE, "Print this text" },
172 { NULL, NULL, STRING, NULL },
173 };
174
175 void
176 set_time(void)
177 {
178 struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
179
180 if (gettimeofday(&newtime, NULL) == -1)
181 {
182 char buf[IRCD_BUFSIZE];
183
184 snprintf(buf, sizeof(buf), "Clock failure, TS can be corrupted: %s",
185 strerror(errno));
186 server_die(buf, SERVER_SHUTDOWN);
187 }
188
189 if (newtime.tv_sec < CurrentTime)
190 {
191 ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
192 (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
193 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
194 "System clock is running backwards - (%lu < %lu)",
195 (unsigned long)newtime.tv_sec,
196 (unsigned long)CurrentTime);
197 event_set_back_events(CurrentTime - newtime.tv_sec);
198 }
199
200 SystemTime.tv_sec = newtime.tv_sec;
201 SystemTime.tv_usec = newtime.tv_usec;
202 }
203
204 static void
205 io_loop(void)
206 {
207 while (1)
208 {
209 if (listing_client_list.head)
210 {
211 dlink_node *node = NULL, *node_next = NULL;
212 DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
213 safe_list_channels(node->data, 0);
214 }
215
216 /* Run pending events */
217 event_run();
218
219 comm_select();
220 exit_aborted_clients();
221 free_exited_clients();
222
223 /* Check to see whether we have to rehash the configuration .. */
224 if (dorehash)
225 {
226 conf_rehash(1);
227 dorehash = 0;
228 }
229
230 if (doremotd)
231 {
232 motd_recache();
233 sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
234 "Got signal SIGUSR1, reloading motd file(s)");
235 doremotd = 0;
236 }
237 }
238 }
239
240 /* initalialize_global_set_options()
241 *
242 * inputs - none
243 * output - none
244 * side effects - This sets all global set options needed
245 */
246 static void
247 initialize_global_set_options(void)
248 {
249 GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
250 GlobalSetOptions.autoconn = 1;
251 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
252 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
253 GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
254 GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
255 GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
256 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
257 }
258
259 /* initialize_server_capabs()
260 *
261 * inputs - none
262 * output - none
263 */
264 static void
265 initialize_server_capabs(void)
266 {
267 add_capability("QS", CAPAB_QS);
268 add_capability("EOB", CAPAB_EOB);
269 add_capability("CLUSTER", CAPAB_CLUSTER);
270 add_capability("SVS", CAPAB_SVS);
271 add_capability("CHW", CAPAB_CHW);
272 add_capability("HOPS", CAPAB_HOPS);
273 }
274
275 /* write_pidfile()
276 *
277 * inputs - filename+path of pid file
278 * output - NONE
279 * side effects - write the pid of the ircd to filename
280 */
281 static void
282 write_pidfile(const char *filename)
283 {
284 FILE *fb;
285
286 if ((fb = fopen(filename, "w")))
287 {
288 char buf[IRCD_BUFSIZE];
289 unsigned int pid = (unsigned int)getpid();
290
291 snprintf(buf, sizeof(buf), "%u\n", pid);
292
293 if (fputs(buf, fb) == -1)
294 ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
295 filename, strerror(errno));
296
297 fclose(fb);
298 }
299 else
300 ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
301 filename, strerror(errno));
302 }
303
304 /* check_pidfile()
305 *
306 * inputs - filename+path of pid file
307 * output - none
308 * side effects - reads pid from pidfile and checks if ircd is in process
309 * list. if it is, gracefully exits
310 * -kre
311 */
312 static void
313 check_pidfile(const char *filename)
314 {
315 FILE *fb;
316 char buf[IRCD_BUFSIZE];
317
318 if ((fb = fopen(filename, "r")))
319 {
320 if (!fgets(buf, 20, fb))
321 ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
322 filename, strerror(errno));
323 else
324 {
325 pid_t pid = atoi(buf);
326
327 if (!kill(pid, 0))
328 {
329 /* log(L_ERROR, "Server is already running"); */
330 printf("ircd: daemon is already running\n");
331 exit(-1);
332 }
333 }
334
335 fclose(fb);
336 }
337 else if (errno != ENOENT)
338 ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
339 filename, strerror(errno));
340 }
341
342 /* setup_corefile()
343 *
344 * inputs - nothing
345 * output - nothing
346 * side effects - setups corefile to system limits.
347 * -kre
348 */
349 static void
350 setup_corefile(void)
351 {
352 #ifdef HAVE_SYS_RESOURCE_H
353 struct rlimit rlim; /* resource limits */
354
355 /* Set corefilesize to maximum */
356 if (!getrlimit(RLIMIT_CORE, &rlim))
357 {
358 rlim.rlim_cur = rlim.rlim_max;
359 setrlimit(RLIMIT_CORE, &rlim);
360 }
361 #endif
362 }
363
364 #ifdef HAVE_LIBCRYPTO
365 static int
366 always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
367 {
368 return 1;
369 }
370 #endif
371
372 /* ssl_init()
373 *
374 * inputs - nothing
375 * output - nothing
376 * side effects - setups SSL context.
377 */
378 static void
379 ssl_init(void)
380 {
381 #ifdef HAVE_LIBCRYPTO
382 SSL_load_error_strings();
383 SSLeay_add_ssl_algorithms();
384
385 if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
386 {
387 const char *s = ERR_lib_error_string(ERR_get_error());
388
389 fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
390 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
391 exit(EXIT_FAILURE);
392 return; /* Not reached */
393 }
394
395 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
396 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE|SSL_OP_CIPHER_SERVER_PREFERENCE);
397 SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
398 always_accept_verify_cb);
399 SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
400 SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
401
402 #if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
403 {
404 EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
405
406 if (key)
407 {
408 SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
409 EC_KEY_free(key);
410 }
411 }
412
413 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
414 #endif
415
416 if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
417 {
418 const char *s = ERR_lib_error_string(ERR_get_error());
419
420 fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
421 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
422 exit(EXIT_FAILURE);
423 return; /* Not reached */
424 }
425
426 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
427 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
428 SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
429 always_accept_verify_cb);
430 SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
431 #endif /* HAVE_LIBCRYPTO */
432 }
433
434 int
435 main(int argc, char *argv[])
436 {
437 /* Check to see if the user is running us as root, which is a nono */
438 if (!geteuid())
439 {
440 fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
441 return -1;
442 }
443
444 /* Setup corefile size immediately after boot -kre */
445 setup_corefile();
446
447 /* Save server boot time right away, so getrusage works correctly */
448 set_time();
449
450 /* It's not random, but it ought to be a little harder to guess */
451 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
452
453 ConfigGeneral.dpath = DPATH;
454 ConfigGeneral.spath = SPATH;
455 ConfigGeneral.mpath = MPATH;
456 ConfigGeneral.configfile = CPATH; /* Server configuration file */
457 ConfigGeneral.klinefile = KPATH; /* Server kline file */
458 ConfigGeneral.xlinefile = XPATH; /* Server xline file */
459 ConfigGeneral.dlinefile = DLPATH; /* dline file */
460 ConfigGeneral.resvfile = RESVPATH; /* resv file */
461
462 myargv = argv;
463 umask(077); /* umask 077: u=rwx,g=,o= */
464
465 parseargs(&argc, &argv, myopts);
466
467 if (printVersion)
468 {
469 printf("ircd: version %s(%s)\n", ircd_version, serno);
470 exit(EXIT_SUCCESS);
471 }
472
473 if (chdir(ConfigGeneral.dpath))
474 {
475 perror("chdir");
476 exit(EXIT_FAILURE);
477 }
478
479 ssl_init();
480
481 if (!server_state.foreground)
482 {
483 make_daemon();
484 close_standard_fds(); /* this needs to be before init_netio()! */
485 }
486 else
487 print_startup(getpid());
488
489 setup_signals();
490
491 /* We need this to initialise the fd array before anything else */
492 fdlist_init();
493 log_set_file(LOG_TYPE_IRCD, 0, logFileName);
494
495 init_netio(); /* This needs to be setup early ! -- adrian */
496
497 /* Check if there is pidfile and daemon already running */
498 check_pidfile(pidFileName);
499
500 mp_pool_init();
501 init_dlink_nodes();
502 isupport_init();
503 dbuf_init();
504 hash_init();
505 userhost_init();
506 ipcache_init();
507 client_init();
508 class_init();
509 whowas_init();
510 watch_init();
511 auth_init(); /* Initialise the auth code */
512 init_resolver(); /* Needs to be setup before the io loop */
513 modules_init();
514 read_conf_files(1); /* cold start init conf files */
515 initialize_server_capabs(); /* Set up default_server_capabs */
516 initialize_global_set_options(); /* Has to be called after read_conf_files() */
517 channel_init();
518 read_links_file();
519 motd_init();
520 user_modes_init();
521 #ifdef HAVE_LIBGEOIP
522 geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
523 #endif
524
525 if (EmptyString(ConfigServerInfo.name))
526 {
527 ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
528 exit(EXIT_FAILURE);
529 }
530
531 strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
532
533 /* serverinfo {} description must exist. If not, error out.*/
534 if (EmptyString(ConfigServerInfo.description))
535 {
536 ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
537 exit(EXIT_FAILURE);
538 }
539
540 strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
541
542 if (EmptyString(ConfigServerInfo.sid))
543 {
544 ilog(LOG_TYPE_IRCD, "Generating server ID");
545 generate_sid();
546 }
547 else
548 strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
549
550 init_uid();
551
552 me.from = &me;
553 me.servptr = &me;
554 me.connection->lasttime = CurrentTime;
555 me.connection->since = CurrentTime;
556 me.connection->firsttime = CurrentTime;
557
558 SetMe(&me);
559 make_server(&me);
560
561 hash_add_id(&me);
562 hash_add_client(&me);
563
564 dlinkAdd(&me, make_dlink_node(), &global_server_list);
565 dlinkAdd(&me, &me.node, &global_client_list);
566
567 load_kline_database();
568 load_dline_database();
569 load_xline_database();
570 load_resv_database();
571
572 load_all_modules(1);
573 load_conf_modules();
574 load_core_modules(1);
575
576 write_pidfile(pidFileName);
577
578 event_addish(&event_cleanup_tklines, NULL);
579
580 /* We want try_connections to be called as soon as possible now! -- adrian */
581 /* No, 'cause after a restart it would cause all sorts of nick collides */
582 event_addish(&event_try_connections, NULL);
583
584 /* Setup the timeout check. I'll shift it later :) -- adrian */
585 event_add(&event_comm_checktimeouts, NULL);
586
587 event_addish(&event_save_all_databases, NULL);
588
589 if (ConfigServerHide.flatten_links_delay && event_write_links_file.active == 0)
590 {
591 event_write_links_file.when = ConfigServerHide.flatten_links_delay;
592 event_add(&event_write_links_file, NULL);
593 }
594
595 ilog(LOG_TYPE_IRCD, "Server Ready");
596 io_loop();
597
598 return 0;
599 }

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