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root/svn/ircd-hybrid/trunk/src/ircd.c
Revision: 6354
Committed: Fri Aug 14 17:53:44 2015 UTC (10 years ago) by michael
Content type: text/x-csrc
File size: 16234 byte(s)
Log Message:
- Rename server capabilities flags from CAP_* to CAPAB_*

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" /* try_connections */
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
62
63 #ifdef HAVE_LIBGEOIP
64 GeoIP *geoip_ctx;
65 #endif
66
67 struct SetOptions GlobalSetOptions; /* /quote set variables */
68 struct Counter Count;
69 struct ServerState_t server_state;
70 struct ServerStatistics ServerStats;
71 struct timeval SystemTime;
72 struct Connection meConnection; /* That's also part of me */
73 struct Client me = { .connection = &meConnection }; /* That's me */
74
75 char **myargv;
76 const char *logFileName = LPATH;
77 const char *pidFileName = PPATH;
78
79 unsigned int dorehash;
80 unsigned int doremotd;
81 unsigned int splitmode;
82 unsigned int splitchecking;
83 unsigned int split_users;
84 unsigned int split_servers;
85
86 static struct event event_cleanup_tklines =
87 {
88 .name = "cleanup_tklines",
89 .handler = cleanup_tklines,
90 .when = CLEANUP_TKLINES_TIME
91 };
92
93 static struct event event_try_connections =
94 {
95 .name = "try_connections",
96 .handler = try_connections,
97 .when = STARTUP_CONNECTIONS_TIME
98 };
99
100 static struct event event_comm_checktimeouts =
101 {
102 .name = "comm_checktimeouts",
103 .handler = comm_checktimeouts,
104 .when = 1
105 };
106
107 static struct event event_save_all_databases =
108 {
109 .name = "save_all_databases",
110 .handler = save_all_databases,
111 .when = DATABASE_UPDATE_TIMEOUT
112 };
113
114 struct event event_write_links_file =
115 {
116 .name = "write_links_file",
117 .handler = write_links_file,
118 };
119
120
121 /*
122 * print_startup - print startup information
123 */
124 static void
125 print_startup(int pid)
126 {
127 printf("ircd: version %s(%s)\n", ircd_version, serno);
128 printf("ircd: pid %d\n", pid);
129 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
130 : "foreground", ConfigGeneral.dpath);
131 }
132
133 static void
134 make_daemon(void)
135 {
136 int pid;
137
138 if ((pid = fork()) < 0)
139 {
140 perror("fork");
141 exit(EXIT_FAILURE);
142 }
143 else if (pid > 0)
144 {
145 print_startup(pid);
146 exit(EXIT_SUCCESS);
147 }
148
149 setsid();
150 }
151
152 static int printVersion = 0;
153
154 static struct lgetopt myopts[] =
155 {
156 {"configfile", &ConfigGeneral.configfile,
157 STRING, "File to use for ircd.conf"},
158 {"klinefile", &ConfigGeneral.klinefile,
159 STRING, "File to use for kline database"},
160 {"dlinefile", &ConfigGeneral.dlinefile,
161 STRING, "File to use for dline database"},
162 {"xlinefile", &ConfigGeneral.xlinefile,
163 STRING, "File to use for xline database"},
164 {"resvfile", &ConfigGeneral.resvfile,
165 STRING, "File to use for resv database"},
166 {"logfile", &logFileName,
167 STRING, "File to use for ircd.log"},
168 {"pidfile", &pidFileName,
169 STRING, "File to use for process ID"},
170 {"foreground", &server_state.foreground,
171 YESNO, "Run in foreground (don't detach)"},
172 {"version", &printVersion,
173 YESNO, "Print version and exit"},
174 {"help", NULL, USAGE, "Print this text"},
175 {NULL, NULL, STRING, NULL},
176 };
177
178 void
179 set_time(void)
180 {
181 struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
182
183 if (gettimeofday(&newtime, NULL) == -1)
184 {
185 ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
186 strerror(errno));
187 sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
188 "Clock Failure (%s), TS can be corrupted",
189 strerror(errno));
190 server_die("Clock Failure", 1);
191 }
192
193 if (newtime.tv_sec < CurrentTime)
194 {
195 ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
196 (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
197 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
198 "System clock is running backwards - (%lu < %lu)",
199 (unsigned long)newtime.tv_sec,
200 (unsigned long)CurrentTime);
201 set_back_events(CurrentTime - newtime.tv_sec);
202 }
203
204 SystemTime.tv_sec = newtime.tv_sec;
205 SystemTime.tv_usec = newtime.tv_usec;
206 }
207
208 static void
209 io_loop(void)
210 {
211 while (1)
212 {
213 if (listing_client_list.head)
214 {
215 dlink_node *node = NULL, *node_next = NULL;
216 DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
217 safe_list_channels(node->data, 0);
218 }
219
220 /* Run pending events */
221 event_run();
222
223 comm_select();
224 exit_aborted_clients();
225 free_exited_clients();
226
227 /* Check to see whether we have to rehash the configuration .. */
228 if (dorehash)
229 {
230 conf_rehash(1);
231 dorehash = 0;
232 }
233
234 if (doremotd)
235 {
236 motd_recache();
237 sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
238 "Got signal SIGUSR1, reloading motd file(s)");
239 doremotd = 0;
240 }
241 }
242 }
243
244 /* initalialize_global_set_options()
245 *
246 * inputs - none
247 * output - none
248 * side effects - This sets all global set options needed
249 */
250 static void
251 initialize_global_set_options(void)
252 {
253 GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
254 GlobalSetOptions.autoconn = 1;
255 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
256 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
257 GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
258 GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
259 GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
260
261 split_servers = ConfigChannel.default_split_server_count;
262 split_users = ConfigChannel.default_split_user_count;
263
264 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
265 ConfigChannel.no_join_on_split))
266 {
267 splitmode = 1;
268 splitchecking = 1;
269 }
270
271 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
272 }
273
274 /* initialize_server_capabs()
275 *
276 * inputs - none
277 * output - none
278 */
279 static void
280 initialize_server_capabs(void)
281 {
282 add_capability("QS", CAPAB_QS);
283 add_capability("EOB", CAPAB_EOB);
284 add_capability("CLUSTER", CAPAB_CLUSTER);
285 add_capability("SVS", CAPAB_SVS);
286 add_capability("CHW", CAPAB_CHW);
287 add_capability("HOPS", CAPAB_HOPS);
288 }
289
290 /* write_pidfile()
291 *
292 * inputs - filename+path of pid file
293 * output - NONE
294 * side effects - write the pid of the ircd to filename
295 */
296 static void
297 write_pidfile(const char *filename)
298 {
299 FILE *fb;
300
301 if ((fb = fopen(filename, "w")))
302 {
303 char buff[IRCD_BUFSIZE];
304 unsigned int pid = (unsigned int)getpid();
305
306 snprintf(buff, sizeof(buff), "%u\n", pid);
307
308 if (fputs(buff, fb) == -1)
309 ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
310 filename, strerror(errno));
311
312 fclose(fb);
313 }
314 else
315 ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
316 filename, strerror(errno));
317 }
318
319 /* check_pidfile()
320 *
321 * inputs - filename+path of pid file
322 * output - none
323 * side effects - reads pid from pidfile and checks if ircd is in process
324 * list. if it is, gracefully exits
325 * -kre
326 */
327 static void
328 check_pidfile(const char *filename)
329 {
330 FILE *fb;
331 char buff[IRCD_BUFSIZE];
332 pid_t pidfromfile;
333
334 if ((fb = fopen(filename, "r")))
335 {
336 if (!fgets(buff, 20, fb))
337 ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
338 filename, strerror(errno));
339 else
340 {
341 pidfromfile = atoi(buff);
342
343 if (!kill(pidfromfile, 0))
344 {
345 /* log(L_ERROR, "Server is already running"); */
346 printf("ircd: daemon is already running\n");
347 exit(-1);
348 }
349 }
350
351 fclose(fb);
352 }
353 else if (errno != ENOENT)
354 ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
355 filename, strerror(errno));
356 }
357
358 /* setup_corefile()
359 *
360 * inputs - nothing
361 * output - nothing
362 * side effects - setups corefile to system limits.
363 * -kre
364 */
365 static void
366 setup_corefile(void)
367 {
368 #ifdef HAVE_SYS_RESOURCE_H
369 struct rlimit rlim; /* resource limits */
370
371 /* Set corefilesize to maximum */
372 if (!getrlimit(RLIMIT_CORE, &rlim))
373 {
374 rlim.rlim_cur = rlim.rlim_max;
375 setrlimit(RLIMIT_CORE, &rlim);
376 }
377 #endif
378 }
379
380 #ifdef HAVE_LIBCRYPTO
381 static int
382 always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
383 {
384 return 1;
385 }
386 #endif
387
388 /* init_ssl()
389 *
390 * inputs - nothing
391 * output - nothing
392 * side effects - setups SSL context.
393 */
394 static void
395 ssl_init(void)
396 {
397 #ifdef HAVE_LIBCRYPTO
398 SSL_load_error_strings();
399 SSLeay_add_ssl_algorithms();
400
401 if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
402 {
403 const char *s = ERR_lib_error_string(ERR_get_error());
404
405 fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
406 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
407 exit(EXIT_FAILURE);
408 return; /* Not reached */
409 }
410
411 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
412 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE|SSL_OP_CIPHER_SERVER_PREFERENCE);
413 SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
414 always_accept_verify_cb);
415 SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
416 SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
417
418 #if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
419 {
420 EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
421
422 if (key)
423 {
424 SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
425 EC_KEY_free(key);
426 }
427 }
428
429 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
430 #endif
431
432 if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
433 {
434 const char *s = ERR_lib_error_string(ERR_get_error());
435
436 fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
437 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
438 exit(EXIT_FAILURE);
439 return; /* Not reached */
440 }
441
442 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
443 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
444 SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
445 always_accept_verify_cb);
446 SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
447 #endif /* HAVE_LIBCRYPTO */
448 }
449
450 int
451 main(int argc, char *argv[])
452 {
453 /* Check to see if the user is running us as root, which is a nono */
454 if (!geteuid())
455 {
456 fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
457 return -1;
458 }
459
460 /* Setup corefile size immediately after boot -kre */
461 setup_corefile();
462
463 /* Save server boot time right away, so getrusage works correctly */
464 set_time();
465
466 /* It's not random, but it ought to be a little harder to guess */
467 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
468
469 dlinkAdd(&me, &me.node, &global_client_list);
470
471 ConfigGeneral.dpath = DPATH;
472 ConfigGeneral.spath = SPATH;
473 ConfigGeneral.mpath = MPATH;
474 ConfigGeneral.configfile = CPATH; /* Server configuration file */
475 ConfigGeneral.klinefile = KPATH; /* Server kline file */
476 ConfigGeneral.xlinefile = XPATH; /* Server xline file */
477 ConfigGeneral.dlinefile = DLPATH; /* dline file */
478 ConfigGeneral.resvfile = RESVPATH; /* resv file */
479
480 myargv = argv;
481 umask(077); /* umask 077: u=rwx,g=,o= */
482
483 parseargs(&argc, &argv, myopts);
484
485 if (printVersion)
486 {
487 printf("ircd: version %s(%s)\n", ircd_version, serno);
488 exit(EXIT_SUCCESS);
489 }
490
491 if (chdir(ConfigGeneral.dpath))
492 {
493 perror("chdir");
494 exit(EXIT_FAILURE);
495 }
496
497 ssl_init();
498
499 if (!server_state.foreground)
500 {
501 make_daemon();
502 close_standard_fds(); /* this needs to be before init_netio()! */
503 }
504 else
505 print_startup(getpid());
506
507 setup_signals();
508
509 /* We need this to initialise the fd array before anything else */
510 fdlist_init();
511 log_set_file(LOG_TYPE_IRCD, 0, logFileName);
512
513 init_netio(); /* This needs to be setup early ! -- adrian */
514
515 /* Check if there is pidfile and daemon already running */
516 check_pidfile(pidFileName);
517
518 mp_pool_init();
519 init_dlink_nodes();
520 isupport_init();
521 dbuf_init();
522 hash_init();
523 ipcache_init();
524 client_init();
525 class_init();
526 whowas_init();
527 watch_init();
528 auth_init(); /* Initialise the auth code */
529 init_resolver(); /* Needs to be setup before the io loop */
530 modules_init();
531 read_conf_files(1); /* cold start init conf files */
532 initialize_server_capabs(); /* Set up default_server_capabs */
533 initialize_global_set_options(); /* Has to be called after read_conf_files() */
534 channel_init();
535 read_links_file();
536 motd_init();
537 user_modes_init();
538 #ifdef HAVE_LIBGEOIP
539 geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
540 #endif
541
542 if (EmptyString(ConfigServerInfo.name))
543 {
544 ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
545 exit(EXIT_FAILURE);
546 }
547
548 strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
549
550 /* serverinfo{} description must exist. If not, error out.*/
551 if (EmptyString(ConfigServerInfo.description))
552 {
553 ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
554 exit(EXIT_FAILURE);
555 }
556
557 strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
558
559 if (EmptyString(ConfigServerInfo.sid))
560 {
561 ilog(LOG_TYPE_IRCD, "Generating server ID");
562 generate_sid();
563 }
564 else
565 {
566 strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
567 }
568
569 me.from = &me;
570 me.servptr = &me;
571 me.connection->lasttime = CurrentTime;
572 me.connection->since = CurrentTime;
573 me.connection->firsttime = CurrentTime;
574
575 SetMe(&me);
576 make_server(&me);
577
578 hash_add_id(&me);
579 hash_add_client(&me);
580
581 dlinkAdd(&me, make_dlink_node(), &global_server_list);
582
583 init_uid();
584
585 load_kline_database();
586 load_dline_database();
587 load_xline_database();
588 load_resv_database();
589
590 load_all_modules(1);
591 load_conf_modules();
592 load_core_modules(1);
593
594 write_pidfile(pidFileName);
595
596 ilog(LOG_TYPE_IRCD, "Server Ready");
597
598 event_addish(&event_cleanup_tklines, NULL);
599
600 /* We want try_connections to be called as soon as possible now! -- adrian */
601 /* No, 'cause after a restart it would cause all sorts of nick collides */
602 event_addish(&event_try_connections, NULL);
603
604 /* Setup the timeout check. I'll shift it later :) -- adrian */
605 event_add(&event_comm_checktimeouts, NULL);
606
607 event_addish(&event_save_all_databases, NULL);
608
609 if (ConfigServerHide.links_delay > 0)
610 {
611 event_write_links_file.when = ConfigServerHide.links_delay;
612 event_addish(&event_write_links_file, NULL);
613 }
614 else
615 ConfigServerHide.links_disabled = 1;
616
617 if (splitmode)
618 event_addish(&splitmode_event, NULL);
619
620 io_loop();
621 return 0;
622 }

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