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root/svn/ircd-hybrid/trunk/src/ircd.c
Revision: 5602
Committed: Mon Feb 23 21:04:46 2015 UTC (10 years, 6 months ago) by michael
Content type: text/x-csrc
File size: 16756 byte(s)
Log Message:
- Fixed core in conjunction with OSX 10.10/possibly other system when parsing pseudo{} blocks as reported by Daniel Oaks
- Reverted -r4080, -r4609 and 4106 as they only cause undefined behavior on some systems

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 /* /quote set variables */
67 struct SetOptions GlobalSetOptions;
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 default_server_capabs;
82 unsigned int splitmode;
83 unsigned int splitchecking;
84 unsigned int split_users;
85 unsigned int split_servers;
86
87 static struct event event_cleanup_glines =
88 {
89 .name = "cleanup_glines",
90 .handler = cleanup_glines,
91 .when = CLEANUP_GLINES_TIME
92 };
93
94 static struct event event_cleanup_tklines =
95 {
96 .name = "cleanup_tklines",
97 .handler = cleanup_tklines,
98 .when = CLEANUP_TKLINES_TIME
99 };
100
101 static struct event event_try_connections =
102 {
103 .name = "try_connections",
104 .handler = try_connections,
105 .when = STARTUP_CONNECTIONS_TIME
106 };
107
108 static struct event event_comm_checktimeouts =
109 {
110 .name = "comm_checktimeouts",
111 .handler = comm_checktimeouts,
112 .when = 1
113 };
114
115 static struct event event_save_all_databases =
116 {
117 .name = "save_all_databases",
118 .handler = save_all_databases,
119 .when = DATABASE_UPDATE_TIMEOUT
120 };
121
122 struct event event_write_links_file =
123 {
124 .name = "write_links_file",
125 .handler = write_links_file,
126 };
127
128
129 /*
130 * print_startup - print startup information
131 */
132 static void
133 print_startup(int pid)
134 {
135 printf("ircd: version %s(%s)\n", ircd_version, serno);
136 printf("ircd: pid %d\n", pid);
137 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
138 : "foreground", ConfigGeneral.dpath);
139 }
140
141 static void
142 make_daemon(void)
143 {
144 int pid;
145
146 if ((pid = fork()) < 0)
147 {
148 perror("fork");
149 exit(EXIT_FAILURE);
150 }
151 else if (pid > 0)
152 {
153 print_startup(pid);
154 exit(EXIT_SUCCESS);
155 }
156
157 setsid();
158 }
159
160 static int printVersion = 0;
161
162 static struct lgetopt myopts[] =
163 {
164 {"configfile", &ConfigGeneral.configfile,
165 STRING, "File to use for ircd.conf"},
166 {"glinefile", &ConfigGeneral.glinefile,
167 STRING, "File to use for gline database"},
168 {"klinefile", &ConfigGeneral.klinefile,
169 STRING, "File to use for kline database"},
170 {"dlinefile", &ConfigGeneral.dlinefile,
171 STRING, "File to use for dline database"},
172 {"xlinefile", &ConfigGeneral.xlinefile,
173 STRING, "File to use for xline database"},
174 {"resvfile", &ConfigGeneral.resvfile,
175 STRING, "File to use for resv database"},
176 {"logfile", &logFileName,
177 STRING, "File to use for ircd.log"},
178 {"pidfile", &pidFileName,
179 STRING, "File to use for process ID"},
180 {"foreground", &server_state.foreground,
181 YESNO, "Run in foreground (don't detach)"},
182 {"version", &printVersion,
183 YESNO, "Print version and exit"},
184 {"help", NULL, USAGE, "Print this text"},
185 {NULL, NULL, STRING, NULL},
186 };
187
188 void
189 set_time(void)
190 {
191 struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
192
193 if (gettimeofday(&newtime, NULL) == -1)
194 {
195 ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
196 strerror(errno));
197 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
198 "Clock Failure (%s), TS can be corrupted",
199 strerror(errno));
200 server_die("Clock Failure", 1);
201 }
202
203 if (newtime.tv_sec < CurrentTime)
204 {
205 ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
206 (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
207 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
208 "System clock is running backwards - (%lu < %lu)",
209 (unsigned long)newtime.tv_sec,
210 (unsigned long)CurrentTime);
211 set_back_events(CurrentTime - newtime.tv_sec);
212 }
213
214 SystemTime.tv_sec = newtime.tv_sec;
215 SystemTime.tv_usec = newtime.tv_usec;
216 }
217
218 static void
219 io_loop(void)
220 {
221 while (1)
222 {
223 if (listing_client_list.head)
224 {
225 dlink_node *node = NULL, *node_next = NULL;
226 DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
227 safe_list_channels(node->data, 0);
228 }
229
230 /* Run pending events */
231 event_run();
232
233 comm_select();
234 exit_aborted_clients();
235 free_exited_clients();
236
237 /* Check to see whether we have to rehash the configuration .. */
238 if (dorehash)
239 {
240 conf_rehash(1);
241 dorehash = 0;
242 }
243
244 if (doremotd)
245 {
246 motd_recache();
247 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
248 "Got signal SIGUSR1, reloading motd file(s)");
249 doremotd = 0;
250 }
251 }
252 }
253
254 /* initalialize_global_set_options()
255 *
256 * inputs - none
257 * output - none
258 * side effects - This sets all global set options needed
259 */
260 static void
261 initialize_global_set_options(void)
262 {
263 GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
264 GlobalSetOptions.autoconn = 1;
265 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
266 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
267 GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
268 GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
269 GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
270
271 split_servers = ConfigChannel.default_split_server_count;
272 split_users = ConfigChannel.default_split_user_count;
273
274 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
275 ConfigChannel.no_join_on_split))
276 {
277 splitmode = 1;
278 splitchecking = 1;
279 }
280
281 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
282 }
283
284 /* initialize_server_capabs()
285 *
286 * inputs - none
287 * output - none
288 */
289 static void
290 initialize_server_capabs(void)
291 {
292 add_capability("QS", CAP_QS, 1);
293 add_capability("EOB", CAP_EOB, 1);
294 add_capability("TS6", CAP_TS6, 0);
295 add_capability("CLUSTER", CAP_CLUSTER, 1);
296 add_capability("SVS", CAP_SVS, 1);
297 add_capability("CHW", CAP_CHW, 1);
298 add_capability("HOPS", CAP_HOPS, 1);
299 }
300
301 /* write_pidfile()
302 *
303 * inputs - filename+path of pid file
304 * output - NONE
305 * side effects - write the pid of the ircd to filename
306 */
307 static void
308 write_pidfile(const char *filename)
309 {
310 FILE *fb;
311
312 if ((fb = fopen(filename, "w")))
313 {
314 char buff[IRCD_BUFSIZE];
315 unsigned int pid = (unsigned int)getpid();
316
317 snprintf(buff, sizeof(buff), "%u\n", pid);
318
319 if (fputs(buff, fb) == -1)
320 ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s: %s",
321 pid, filename, strerror(errno));
322
323 fclose(fb);
324 }
325 else
326 ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
327 filename, strerror(errno));
328 }
329
330 /* check_pidfile()
331 *
332 * inputs - filename+path of pid file
333 * output - none
334 * side effects - reads pid from pidfile and checks if ircd is in process
335 * list. if it is, gracefully exits
336 * -kre
337 */
338 static void
339 check_pidfile(const char *filename)
340 {
341 FILE *fb;
342 char buff[IRCD_BUFSIZE];
343 pid_t pidfromfile;
344
345 /* Don't do logging here, since we don't have log() initialised */
346 if ((fb = fopen(filename, "r")))
347 {
348 if (!fgets(buff, 20, fb))
349 {
350 /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
351 * strerror(errno));
352 */
353 }
354 else
355 {
356 pidfromfile = atoi(buff);
357
358 if (!kill(pidfromfile, 0))
359 {
360 /* log(L_ERROR, "Server is already running"); */
361 printf("ircd: daemon is already running\n");
362 exit(-1);
363 }
364 }
365
366 fclose(fb);
367 }
368 else if (errno != ENOENT)
369 {
370 /* log(L_ERROR, "Error opening pid file %s", filename); */
371 }
372 }
373
374 /* setup_corefile()
375 *
376 * inputs - nothing
377 * output - nothing
378 * side effects - setups corefile to system limits.
379 * -kre
380 */
381 static void
382 setup_corefile(void)
383 {
384 #ifdef HAVE_SYS_RESOURCE_H
385 struct rlimit rlim; /* resource limits */
386
387 /* Set corefilesize to maximum */
388 if (!getrlimit(RLIMIT_CORE, &rlim))
389 {
390 rlim.rlim_cur = rlim.rlim_max;
391 setrlimit(RLIMIT_CORE, &rlim);
392 }
393 #endif
394 }
395
396 #ifdef HAVE_LIBCRYPTO
397 static int
398 always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
399 {
400 return 1;
401 }
402 #endif
403
404 /* init_ssl()
405 *
406 * inputs - nothing
407 * output - nothing
408 * side effects - setups SSL context.
409 */
410 static void
411 ssl_init(void)
412 {
413 #ifdef HAVE_LIBCRYPTO
414 SSL_load_error_strings();
415 SSLeay_add_ssl_algorithms();
416
417 if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
418 {
419 const char *s = ERR_lib_error_string(ERR_get_error());
420
421 fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
422 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
423 exit(EXIT_FAILURE);
424 return; /* Not reached */
425 }
426
427 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
428 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE|SSL_OP_CIPHER_SERVER_PREFERENCE);
429 SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
430 always_accept_verify_cb);
431 SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
432 SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
433
434 #if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
435 {
436 EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
437
438 if (key)
439 {
440 SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
441 EC_KEY_free(key);
442 }
443 }
444
445 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
446 #endif
447
448 if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
449 {
450 const char *s = ERR_lib_error_string(ERR_get_error());
451
452 fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
453 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
454 exit(EXIT_FAILURE);
455 return; /* Not reached */
456 }
457
458 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
459 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
460 SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
461 always_accept_verify_cb);
462 SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
463 #endif /* HAVE_LIBCRYPTO */
464 }
465
466 int
467 main(int argc, char *argv[])
468 {
469 /* Check to see if the user is running us as root, which is a nono */
470 if (!geteuid())
471 {
472 fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
473 return -1;
474 }
475
476 /* Setup corefile size immediately after boot -kre */
477 setup_corefile();
478
479 /* Save server boot time right away, so getrusage works correctly */
480 set_time();
481
482 /* It's not random, but it ought to be a little harder to guess */
483 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
484
485 dlinkAdd(&me, &me.node, &global_client_list);
486
487 ConfigGeneral.dpath = DPATH;
488 ConfigGeneral.spath = SPATH;
489 ConfigGeneral.mpath = MPATH;
490 ConfigGeneral.configfile = CPATH; /* Server configuration file */
491 ConfigGeneral.klinefile = KPATH; /* Server kline file */
492 ConfigGeneral.glinefile = GPATH; /* Server gline file */
493 ConfigGeneral.xlinefile = XPATH; /* Server xline file */
494 ConfigGeneral.dlinefile = DLPATH; /* dline file */
495 ConfigGeneral.resvfile = RESVPATH; /* resv file */
496
497 myargv = argv;
498 umask(077); /* better safe than sorry --SRB */
499
500 parseargs(&argc, &argv, myopts);
501
502 if (printVersion)
503 {
504 printf("ircd: version %s(%s)\n", ircd_version, serno);
505 exit(EXIT_SUCCESS);
506 }
507
508 if (chdir(ConfigGeneral.dpath))
509 {
510 perror("chdir");
511 exit(EXIT_FAILURE);
512 }
513
514 ssl_init();
515
516 if (!server_state.foreground)
517 {
518 make_daemon();
519 close_standard_fds(); /* this needs to be before init_netio()! */
520 }
521 else
522 print_startup(getpid());
523
524 setup_signals();
525
526 /* We need this to initialise the fd array before anything else */
527 fdlist_init();
528 log_set_file(LOG_TYPE_IRCD, 0, logFileName);
529
530 init_netio(); /* This needs to be setup early ! -- adrian */
531
532 /* Check if there is pidfile and daemon already running */
533 check_pidfile(pidFileName);
534
535 mp_pool_init();
536 init_dlink_nodes();
537 init_isupport();
538 dbuf_init();
539 hash_init();
540 ipcache_init();
541 client_init();
542 class_init();
543 whowas_init();
544 watch_init();
545 auth_init(); /* Initialise the auth code */
546 init_resolver(); /* Needs to be setup before the io loop */
547 modules_init();
548 read_conf_files(1); /* cold start init conf files */
549 init_uid();
550 initialize_server_capabs(); /* Set up default_server_capabs */
551 initialize_global_set_options(); /* Has to be called after read_conf_files() */
552 channel_init();
553 read_links_file();
554 motd_init();
555 user_usermodes_init();
556 #ifdef HAVE_LIBGEOIP
557 geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
558 #endif
559
560 if (EmptyString(ConfigServerInfo.sid))
561 {
562 ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
563 exit(EXIT_FAILURE);
564 }
565
566 strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
567
568 if (EmptyString(ConfigServerInfo.name))
569 {
570 ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
571 exit(EXIT_FAILURE);
572 }
573
574 strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
575
576 /* serverinfo{} description must exist. If not, error out.*/
577 if (EmptyString(ConfigServerInfo.description))
578 {
579 ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
580 exit(EXIT_FAILURE);
581 }
582
583 strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
584
585 me.from = &me;
586 me.servptr = &me;
587 me.connection->lasttime = CurrentTime;
588 me.connection->since = CurrentTime;
589 me.connection->firsttime = CurrentTime;
590
591 SetMe(&me);
592 make_server(&me);
593
594 hash_add_id(&me);
595 hash_add_client(&me);
596
597 dlinkAdd(&me, make_dlink_node(), &global_server_list);
598
599 load_kline_database();
600 load_dline_database();
601 load_gline_database();
602 load_xline_database();
603 load_resv_database();
604
605 load_all_modules(1);
606 load_conf_modules();
607 load_core_modules(1);
608
609 write_pidfile(pidFileName);
610
611 ilog(LOG_TYPE_IRCD, "Server Ready");
612
613 event_addish(&event_cleanup_glines, NULL);
614 event_addish(&event_cleanup_tklines, NULL);
615
616 /* We want try_connections to be called as soon as possible now! -- adrian */
617 /* No, 'cause after a restart it would cause all sorts of nick collides */
618 event_addish(&event_try_connections, NULL);
619
620 /* Setup the timeout check. I'll shift it later :) -- adrian */
621 event_add(&event_comm_checktimeouts, NULL);
622
623 event_addish(&event_save_all_databases, NULL);
624
625 if (ConfigServerHide.links_delay > 0)
626 {
627 event_write_links_file.when = ConfigServerHide.links_delay;
628 event_addish(&event_write_links_file, NULL);
629 }
630 else
631 ConfigServerHide.links_disabled = 1;
632
633 if (splitmode)
634 event_addish(&splitmode_event, NULL);
635
636 io_loop();
637 return 0;
638 }

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