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root/svn/ircd-hybrid/trunk/src/ircd.c
Revision: 5796
Committed: Fri Apr 17 16:12:30 2015 UTC (10 years, 4 months ago) by michael
Content type: text/x-csrc
File size: 16639 byte(s)
Log Message:
- Minor cleanups to CAPAB related code

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 "irc_string.h"
37 #include "ircd_signal.h"
38 #include "gline.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
61
62 #ifdef HAVE_LIBGEOIP
63 GeoIP *geoip_ctx;
64 #endif
65
66 struct SetOptions GlobalSetOptions; /* /quote set variables */
67 struct Counter Count;
68 struct ServerState_t server_state;
69 struct ServerStatistics ServerStats;
70 struct timeval SystemTime;
71 struct Connection meConnection; /* That's also part of me */
72 struct Client me = { .connection = &meConnection }; /* That's me */
73
74 char **myargv;
75 const char *logFileName = LPATH;
76 const char *pidFileName = PPATH;
77
78 unsigned int dorehash;
79 unsigned int doremotd;
80 unsigned int splitmode;
81 unsigned int splitchecking;
82 unsigned int split_users;
83 unsigned int split_servers;
84
85 static struct event event_cleanup_glines =
86 {
87 .name = "cleanup_glines",
88 .handler = cleanup_glines,
89 .when = CLEANUP_GLINES_TIME
90 };
91
92 static struct event event_cleanup_tklines =
93 {
94 .name = "cleanup_tklines",
95 .handler = cleanup_tklines,
96 .when = CLEANUP_TKLINES_TIME
97 };
98
99 static struct event event_try_connections =
100 {
101 .name = "try_connections",
102 .handler = try_connections,
103 .when = STARTUP_CONNECTIONS_TIME
104 };
105
106 static struct event event_comm_checktimeouts =
107 {
108 .name = "comm_checktimeouts",
109 .handler = comm_checktimeouts,
110 .when = 1
111 };
112
113 static struct event event_save_all_databases =
114 {
115 .name = "save_all_databases",
116 .handler = save_all_databases,
117 .when = DATABASE_UPDATE_TIMEOUT
118 };
119
120 struct event event_write_links_file =
121 {
122 .name = "write_links_file",
123 .handler = write_links_file,
124 };
125
126
127 /*
128 * print_startup - print startup information
129 */
130 static void
131 print_startup(int pid)
132 {
133 printf("ircd: version %s(%s)\n", ircd_version, serno);
134 printf("ircd: pid %d\n", pid);
135 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
136 : "foreground", ConfigGeneral.dpath);
137 }
138
139 static void
140 make_daemon(void)
141 {
142 int pid;
143
144 if ((pid = fork()) < 0)
145 {
146 perror("fork");
147 exit(EXIT_FAILURE);
148 }
149 else if (pid > 0)
150 {
151 print_startup(pid);
152 exit(EXIT_SUCCESS);
153 }
154
155 setsid();
156 }
157
158 static int printVersion = 0;
159
160 static struct lgetopt myopts[] =
161 {
162 {"configfile", &ConfigGeneral.configfile,
163 STRING, "File to use for ircd.conf"},
164 {"glinefile", &ConfigGeneral.glinefile,
165 STRING, "File to use for gline database"},
166 {"klinefile", &ConfigGeneral.klinefile,
167 STRING, "File to use for kline database"},
168 {"dlinefile", &ConfigGeneral.dlinefile,
169 STRING, "File to use for dline database"},
170 {"xlinefile", &ConfigGeneral.xlinefile,
171 STRING, "File to use for xline database"},
172 {"resvfile", &ConfigGeneral.resvfile,
173 STRING, "File to use for resv database"},
174 {"logfile", &logFileName,
175 STRING, "File to use for ircd.log"},
176 {"pidfile", &pidFileName,
177 STRING, "File to use for process ID"},
178 {"foreground", &server_state.foreground,
179 YESNO, "Run in foreground (don't detach)"},
180 {"version", &printVersion,
181 YESNO, "Print version and exit"},
182 {"help", NULL, USAGE, "Print this text"},
183 {NULL, NULL, STRING, NULL},
184 };
185
186 void
187 set_time(void)
188 {
189 struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
190
191 if (gettimeofday(&newtime, NULL) == -1)
192 {
193 ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
194 strerror(errno));
195 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
196 "Clock Failure (%s), TS can be corrupted",
197 strerror(errno));
198 server_die("Clock Failure", 1);
199 }
200
201 if (newtime.tv_sec < CurrentTime)
202 {
203 ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
204 (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
205 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
206 "System clock is running backwards - (%lu < %lu)",
207 (unsigned long)newtime.tv_sec,
208 (unsigned long)CurrentTime);
209 set_back_events(CurrentTime - newtime.tv_sec);
210 }
211
212 SystemTime.tv_sec = newtime.tv_sec;
213 SystemTime.tv_usec = newtime.tv_usec;
214 }
215
216 static void
217 io_loop(void)
218 {
219 while (1)
220 {
221 if (listing_client_list.head)
222 {
223 dlink_node *node = NULL, *node_next = NULL;
224 DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
225 safe_list_channels(node->data, 0);
226 }
227
228 /* Run pending events */
229 event_run();
230
231 comm_select();
232 exit_aborted_clients();
233 free_exited_clients();
234
235 /* Check to see whether we have to rehash the configuration .. */
236 if (dorehash)
237 {
238 conf_rehash(1);
239 dorehash = 0;
240 }
241
242 if (doremotd)
243 {
244 motd_recache();
245 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
246 "Got signal SIGUSR1, reloading motd file(s)");
247 doremotd = 0;
248 }
249 }
250 }
251
252 /* initalialize_global_set_options()
253 *
254 * inputs - none
255 * output - none
256 * side effects - This sets all global set options needed
257 */
258 static void
259 initialize_global_set_options(void)
260 {
261 GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
262 GlobalSetOptions.autoconn = 1;
263 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
264 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
265 GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
266 GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
267 GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
268
269 split_servers = ConfigChannel.default_split_server_count;
270 split_users = ConfigChannel.default_split_user_count;
271
272 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
273 ConfigChannel.no_join_on_split))
274 {
275 splitmode = 1;
276 splitchecking = 1;
277 }
278
279 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
280 }
281
282 /* initialize_server_capabs()
283 *
284 * inputs - none
285 * output - none
286 */
287 static void
288 initialize_server_capabs(void)
289 {
290 add_capability("QS", CAP_QS);
291 add_capability("EOB", CAP_EOB);
292 add_capability("CLUSTER", CAP_CLUSTER);
293 add_capability("SVS", CAP_SVS);
294 add_capability("CHW", CAP_CHW);
295 add_capability("HOPS", CAP_HOPS);
296 }
297
298 /* write_pidfile()
299 *
300 * inputs - filename+path of pid file
301 * output - NONE
302 * side effects - write the pid of the ircd to filename
303 */
304 static void
305 write_pidfile(const char *filename)
306 {
307 FILE *fb;
308
309 if ((fb = fopen(filename, "w")))
310 {
311 char buff[IRCD_BUFSIZE];
312 unsigned int pid = (unsigned int)getpid();
313
314 snprintf(buff, sizeof(buff), "%u\n", pid);
315
316 if (fputs(buff, fb) == -1)
317 ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
318 filename, strerror(errno));
319
320 fclose(fb);
321 }
322 else
323 ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
324 filename, strerror(errno));
325 }
326
327 /* check_pidfile()
328 *
329 * inputs - filename+path of pid file
330 * output - none
331 * side effects - reads pid from pidfile and checks if ircd is in process
332 * list. if it is, gracefully exits
333 * -kre
334 */
335 static void
336 check_pidfile(const char *filename)
337 {
338 FILE *fb;
339 char buff[IRCD_BUFSIZE];
340 pid_t pidfromfile;
341
342 /* Don't do logging here, since we don't have log() initialised */
343 if ((fb = fopen(filename, "r")))
344 {
345 if (!fgets(buff, 20, fb))
346 {
347 /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
348 * strerror(errno));
349 */
350 }
351 else
352 {
353 pidfromfile = atoi(buff);
354
355 if (!kill(pidfromfile, 0))
356 {
357 /* log(L_ERROR, "Server is already running"); */
358 printf("ircd: daemon is already running\n");
359 exit(-1);
360 }
361 }
362
363 fclose(fb);
364 }
365 else if (errno != ENOENT)
366 {
367 /* log(L_ERROR, "Error opening pid file %s", filename); */
368 }
369 }
370
371 /* setup_corefile()
372 *
373 * inputs - nothing
374 * output - nothing
375 * side effects - setups corefile to system limits.
376 * -kre
377 */
378 static void
379 setup_corefile(void)
380 {
381 #ifdef HAVE_SYS_RESOURCE_H
382 struct rlimit rlim; /* resource limits */
383
384 /* Set corefilesize to maximum */
385 if (!getrlimit(RLIMIT_CORE, &rlim))
386 {
387 rlim.rlim_cur = rlim.rlim_max;
388 setrlimit(RLIMIT_CORE, &rlim);
389 }
390 #endif
391 }
392
393 #ifdef HAVE_LIBCRYPTO
394 static int
395 always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
396 {
397 return 1;
398 }
399 #endif
400
401 /* init_ssl()
402 *
403 * inputs - nothing
404 * output - nothing
405 * side effects - setups SSL context.
406 */
407 static void
408 ssl_init(void)
409 {
410 #ifdef HAVE_LIBCRYPTO
411 SSL_load_error_strings();
412 SSLeay_add_ssl_algorithms();
413
414 if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
415 {
416 const char *s = ERR_lib_error_string(ERR_get_error());
417
418 fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
419 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
420 exit(EXIT_FAILURE);
421 return; /* Not reached */
422 }
423
424 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
425 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE|SSL_OP_CIPHER_SERVER_PREFERENCE);
426 SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
427 always_accept_verify_cb);
428 SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
429 SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
430
431 #if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
432 {
433 EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
434
435 if (key)
436 {
437 SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
438 EC_KEY_free(key);
439 }
440 }
441
442 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
443 #endif
444
445 if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
446 {
447 const char *s = ERR_lib_error_string(ERR_get_error());
448
449 fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
450 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
451 exit(EXIT_FAILURE);
452 return; /* Not reached */
453 }
454
455 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
456 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
457 SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
458 always_accept_verify_cb);
459 SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
460 #endif /* HAVE_LIBCRYPTO */
461 }
462
463 int
464 main(int argc, char *argv[])
465 {
466 /* Check to see if the user is running us as root, which is a nono */
467 if (!geteuid())
468 {
469 fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
470 return -1;
471 }
472
473 /* Setup corefile size immediately after boot -kre */
474 setup_corefile();
475
476 /* Save server boot time right away, so getrusage works correctly */
477 set_time();
478
479 /* It's not random, but it ought to be a little harder to guess */
480 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
481
482 dlinkAdd(&me, &me.node, &global_client_list);
483
484 ConfigGeneral.dpath = DPATH;
485 ConfigGeneral.spath = SPATH;
486 ConfigGeneral.mpath = MPATH;
487 ConfigGeneral.configfile = CPATH; /* Server configuration file */
488 ConfigGeneral.klinefile = KPATH; /* Server kline file */
489 ConfigGeneral.glinefile = GPATH; /* Server gline file */
490 ConfigGeneral.xlinefile = XPATH; /* Server xline file */
491 ConfigGeneral.dlinefile = DLPATH; /* dline file */
492 ConfigGeneral.resvfile = RESVPATH; /* resv file */
493
494 myargv = argv;
495 umask(077); /* umask 077: u=rwx,g=,o= */
496
497 parseargs(&argc, &argv, myopts);
498
499 if (printVersion)
500 {
501 printf("ircd: version %s(%s)\n", ircd_version, serno);
502 exit(EXIT_SUCCESS);
503 }
504
505 if (chdir(ConfigGeneral.dpath))
506 {
507 perror("chdir");
508 exit(EXIT_FAILURE);
509 }
510
511 ssl_init();
512
513 if (!server_state.foreground)
514 {
515 make_daemon();
516 close_standard_fds(); /* this needs to be before init_netio()! */
517 }
518 else
519 print_startup(getpid());
520
521 setup_signals();
522
523 /* We need this to initialise the fd array before anything else */
524 fdlist_init();
525 log_set_file(LOG_TYPE_IRCD, 0, logFileName);
526
527 init_netio(); /* This needs to be setup early ! -- adrian */
528
529 /* Check if there is pidfile and daemon already running */
530 check_pidfile(pidFileName);
531
532 mp_pool_init();
533 init_dlink_nodes();
534 init_isupport();
535 dbuf_init();
536 hash_init();
537 ipcache_init();
538 client_init();
539 class_init();
540 whowas_init();
541 watch_init();
542 auth_init(); /* Initialise the auth code */
543 init_resolver(); /* Needs to be setup before the io loop */
544 modules_init();
545 read_conf_files(1); /* cold start init conf files */
546 init_uid();
547 initialize_server_capabs(); /* Set up default_server_capabs */
548 initialize_global_set_options(); /* Has to be called after read_conf_files() */
549 channel_init();
550 read_links_file();
551 motd_init();
552 user_usermodes_init();
553 #ifdef HAVE_LIBGEOIP
554 geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
555 #endif
556
557 if (EmptyString(ConfigServerInfo.sid))
558 {
559 ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
560 exit(EXIT_FAILURE);
561 }
562
563 strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
564
565 if (EmptyString(ConfigServerInfo.name))
566 {
567 ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
568 exit(EXIT_FAILURE);
569 }
570
571 strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
572
573 /* serverinfo{} description must exist. If not, error out.*/
574 if (EmptyString(ConfigServerInfo.description))
575 {
576 ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
577 exit(EXIT_FAILURE);
578 }
579
580 strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
581
582 me.from = &me;
583 me.servptr = &me;
584 me.connection->lasttime = CurrentTime;
585 me.connection->since = CurrentTime;
586 me.connection->firsttime = CurrentTime;
587
588 SetMe(&me);
589 make_server(&me);
590
591 hash_add_id(&me);
592 hash_add_client(&me);
593
594 dlinkAdd(&me, make_dlink_node(), &global_server_list);
595
596 load_kline_database();
597 load_dline_database();
598 load_gline_database();
599 load_xline_database();
600 load_resv_database();
601
602 load_all_modules(1);
603 load_conf_modules();
604 load_core_modules(1);
605
606 write_pidfile(pidFileName);
607
608 ilog(LOG_TYPE_IRCD, "Server Ready");
609
610 event_addish(&event_cleanup_glines, NULL);
611 event_addish(&event_cleanup_tklines, NULL);
612
613 /* We want try_connections to be called as soon as possible now! -- adrian */
614 /* No, 'cause after a restart it would cause all sorts of nick collides */
615 event_addish(&event_try_connections, NULL);
616
617 /* Setup the timeout check. I'll shift it later :) -- adrian */
618 event_add(&event_comm_checktimeouts, NULL);
619
620 event_addish(&event_save_all_databases, NULL);
621
622 if (ConfigServerHide.links_delay > 0)
623 {
624 event_write_links_file.when = ConfigServerHide.links_delay;
625 event_addish(&event_write_links_file, NULL);
626 }
627 else
628 ConfigServerHide.links_disabled = 1;
629
630 if (splitmode)
631 event_addish(&splitmode_event, NULL);
632
633 io_loop();
634 return 0;
635 }

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