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root/svn/ircd-hybrid/trunk/src/ircd.c
Revision: 2646
Committed: Tue Dec 10 19:30:18 2013 UTC (10 years, 4 months ago) by michael
Content type: text/x-csrc
File size: 17400 byte(s)
Log Message:
- ircd.c: show serial number on startup

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * ircd.c: Starts up and runs the ircd.
4 *
5 * Copyright (C) 2002 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #include "s_user.h"
27 #include "list.h"
28 #include "ircd.h"
29 #include "channel.h"
30 #include "channel_mode.h"
31 #include "client.h"
32 #include "event.h"
33 #include "fdlist.h"
34 #include "hash.h"
35 #include "irc_string.h"
36 #include "ircd_signal.h"
37 #include "s_gline.h"
38 #include "motd.h"
39 #include "conf.h"
40 #include "hostmask.h"
41 #include "numeric.h"
42 #include "packet.h"
43 #include "parse.h"
44 #include "irc_res.h"
45 #include "restart.h"
46 #include "rng_mt.h"
47 #include "s_auth.h"
48 #include "s_bsd.h"
49 #include "log.h"
50 #include "s_misc.h"
51 #include "s_serv.h" /* try_connections */
52 #include "send.h"
53 #include "whowas.h"
54 #include "modules.h"
55 #include "memory.h"
56 #include "mempool.h"
57 #include "hook.h"
58 #include "ircd_getopt.h"
59 #include "supported.h"
60 #include "watch.h"
61 #include "conf_db.h"
62 #include "conf_class.h"
63
64
65 #ifdef HAVE_LIBGEOIP
66 GeoIP *geoip_ctx;
67 #endif
68 /* /quote set variables */
69 struct SetOptions GlobalSetOptions;
70
71 /* configuration set from ircd.conf */
72 struct config_file_entry ConfigFileEntry;
73 /* server info set from ircd.conf */
74 struct server_info ServerInfo;
75 /* admin info set from ircd.conf */
76 struct admin_info AdminInfo = { NULL, NULL, NULL };
77 struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
78 struct ServerState_t server_state = { 0 };
79 struct logging_entry ConfigLoggingEntry = { .use_logging = 1 };
80 struct ServerStatistics ServerStats;
81 struct timeval SystemTime;
82 struct Client me; /* That's me */
83 struct LocalUser meLocalUser; /* That's also part of me */
84
85 const char *logFileName = LPATH;
86 const char *pidFileName = PPATH;
87
88 char **myargv;
89
90 int dorehash = 0;
91 int doremotd = 0;
92
93 /* Set to zero because it should be initialized later using
94 * initialize_server_capabs
95 */
96 int default_server_capabs = 0;
97 unsigned int splitmode;
98 unsigned int splitchecking;
99 unsigned int split_users;
100 unsigned int split_servers;
101
102 /* Do klines the same way hybrid-6 did them, i.e. at the
103 * top of the next io_loop instead of in the same loop as
104 * the klines are being applied.
105 *
106 * This should fix strange CPU starvation as very indirectly reported.
107 * (Why do you people not email bug reports? WHY? WHY?)
108 *
109 * - Dianora
110 */
111
112 int rehashed_klines = 0;
113
114
115 /*
116 * print_startup - print startup information
117 */
118 static void
119 print_startup(int pid)
120 {
121 printf("ircd: version %s(%s)\n", ircd_version, serno);
122 printf("ircd: pid %d\n", pid);
123 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
124 : "foreground", ConfigFileEntry.dpath);
125 }
126
127 static void
128 make_daemon(void)
129 {
130 int pid;
131
132 if ((pid = fork()) < 0)
133 {
134 perror("fork");
135 exit(EXIT_FAILURE);
136 }
137 else if (pid > 0)
138 {
139 print_startup(pid);
140 exit(EXIT_SUCCESS);
141 }
142
143 setsid();
144 }
145
146 static int printVersion = 0;
147
148 static struct lgetopt myopts[] = {
149 {"configfile", &ConfigFileEntry.configfile,
150 STRING, "File to use for ircd.conf"},
151 {"glinefile", &ConfigFileEntry.glinefile,
152 STRING, "File to use for gline database"},
153 {"klinefile", &ConfigFileEntry.klinefile,
154 STRING, "File to use for kline database"},
155 {"dlinefile", &ConfigFileEntry.dlinefile,
156 STRING, "File to use for dline database"},
157 {"xlinefile", &ConfigFileEntry.xlinefile,
158 STRING, "File to use for xline database"},
159 {"resvfile", &ConfigFileEntry.resvfile,
160 STRING, "File to use for resv database"},
161 {"logfile", &logFileName,
162 STRING, "File to use for ircd.log"},
163 {"pidfile", &pidFileName,
164 STRING, "File to use for process ID"},
165 {"foreground", &server_state.foreground,
166 YESNO, "Run in foreground (don't detach)"},
167 {"version", &printVersion,
168 YESNO, "Print version and exit"},
169 {"help", NULL, USAGE, "Print this text"},
170 {NULL, NULL, STRING, NULL},
171 };
172
173 void
174 set_time(void)
175 {
176 static char to_send[200];
177 struct timeval newtime;
178 newtime.tv_sec = 0;
179 newtime.tv_usec = 0;
180
181 if (gettimeofday(&newtime, NULL) == -1)
182 {
183 ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
184 strerror(errno));
185 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
186 "Clock Failure (%s), TS can be corrupted",
187 strerror(errno));
188 restart("Clock Failure");
189 }
190
191 if (newtime.tv_sec < CurrentTime)
192 {
193 snprintf(to_send, sizeof(to_send),
194 "System clock is running backwards - (%lu < %lu)",
195 (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
196 report_error(L_ALL, to_send, me.name, 0);
197 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 == 1)
208 {
209 /*
210 * Maybe we want a flags word?
211 * ie. if (REHASHED_KLINES(global_flags))
212 * SET_REHASHED_KLINES(global_flags)
213 * CLEAR_REHASHED_KLINES(global_flags)
214 *
215 * - Dianora
216 */
217 if (rehashed_klines)
218 {
219 check_conf_klines();
220 rehashed_klines = 0;
221 }
222
223 if (listing_client_list.head)
224 {
225 dlink_node *ptr = NULL, *ptr_next = NULL;
226 DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
227 {
228 struct Client *client_p = ptr->data;
229 assert(client_p->localClient->list_task);
230 safe_list_channels(client_p, client_p->localClient->list_task, 0);
231 }
232 }
233
234 /* Run pending events, then get the number of seconds to the next
235 * event
236 */
237 while (eventNextTime() <= CurrentTime)
238 eventRun();
239
240 comm_select();
241 exit_aborted_clients();
242 free_exited_clients();
243 send_queued_all();
244
245 /* Check to see whether we have to rehash the configuration .. */
246 if (dorehash)
247 {
248 rehash(1);
249 dorehash = 0;
250 }
251 if (doremotd)
252 {
253 motd_recache();
254 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
255 "Got signal SIGUSR1, reloading motd files");
256 doremotd = 0;
257 }
258 }
259 }
260
261 /* initalialize_global_set_options()
262 *
263 * inputs - none
264 * output - none
265 * side effects - This sets all global set options needed
266 */
267 static void
268 initialize_global_set_options(void)
269 {
270 memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
271
272 GlobalSetOptions.autoconn = 1;
273 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
274 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
275
276 if (ConfigFileEntry.default_floodcount)
277 GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
278 else
279 GlobalSetOptions.floodcount = 10;
280
281 /* XXX I have no idea what to try here - Dianora */
282 GlobalSetOptions.joinfloodcount = 16;
283 GlobalSetOptions.joinfloodtime = 8;
284
285 split_servers = ConfigChannel.default_split_server_count;
286 split_users = ConfigChannel.default_split_user_count;
287
288 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
289 ConfigChannel.no_join_on_split))
290 {
291 splitmode = 1;
292 splitchecking = 1;
293 }
294
295 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
296 /* End of global set options */
297 }
298
299 /* initialize_server_capabs()
300 *
301 * inputs - none
302 * output - none
303 */
304 static void
305 initialize_server_capabs(void)
306 {
307 add_capability("QS", CAP_QS, 1);
308 add_capability("EOB", CAP_EOB, 1);
309 add_capability("TS6", CAP_TS6, 0);
310 add_capability("CLUSTER", CAP_CLUSTER, 1);
311 // add_capability("FAKEHOST", CAP_FAKEHOST, 1);
312 add_capability("SVS", CAP_SVS, 1);
313 #ifdef HALFOPS
314 add_capability("HOPS", CAP_HOPS, 1);
315 #endif
316 }
317
318 /* write_pidfile()
319 *
320 * inputs - filename+path of pid file
321 * output - NONE
322 * side effects - write the pid of the ircd to filename
323 */
324 static void
325 write_pidfile(const char *filename)
326 {
327 FILE *fb;
328
329 if ((fb = fopen(filename, "w")))
330 {
331 char buff[32];
332 unsigned int pid = (unsigned int)getpid();
333
334 snprintf(buff, sizeof(buff), "%u\n", pid);
335
336 if ((fputs(buff, fb) == -1))
337 ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
338 pid, filename, strerror(errno));
339
340 fclose(fb);
341 }
342 else
343 {
344 ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
345 }
346 }
347
348 /* check_pidfile()
349 *
350 * inputs - filename+path of pid file
351 * output - none
352 * side effects - reads pid from pidfile and checks if ircd is in process
353 * list. if it is, gracefully exits
354 * -kre
355 */
356 static void
357 check_pidfile(const char *filename)
358 {
359 FILE *fb;
360 char buff[32];
361 pid_t pidfromfile;
362
363 /* Don't do logging here, since we don't have log() initialised */
364 if ((fb = fopen(filename, "r")))
365 {
366 if (fgets(buff, 20, fb) == NULL)
367 {
368 /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
369 * strerror(errno));
370 */
371 }
372 else
373 {
374 pidfromfile = atoi(buff);
375
376 if (!kill(pidfromfile, 0))
377 {
378 /* log(L_ERROR, "Server is already running"); */
379 printf("ircd: daemon is already running\n");
380 exit(-1);
381 }
382 }
383
384 fclose(fb);
385 }
386 else if (errno != ENOENT)
387 {
388 /* log(L_ERROR, "Error opening pid file %s", filename); */
389 }
390 }
391
392 /* setup_corefile()
393 *
394 * inputs - nothing
395 * output - nothing
396 * side effects - setups corefile to system limits.
397 * -kre
398 */
399 static void
400 setup_corefile(void)
401 {
402 #ifdef HAVE_SYS_RESOURCE_H
403 struct rlimit rlim; /* resource limits */
404
405 /* Set corefilesize to maximum */
406 if (!getrlimit(RLIMIT_CORE, &rlim))
407 {
408 rlim.rlim_cur = rlim.rlim_max;
409 setrlimit(RLIMIT_CORE, &rlim);
410 }
411 #endif
412 }
413
414 #ifdef HAVE_LIBCRYPTO
415 static int
416 always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
417 {
418 return 1;
419 }
420 #endif
421
422 /* init_ssl()
423 *
424 * inputs - nothing
425 * output - nothing
426 * side effects - setups SSL context.
427 */
428 static void
429 ssl_init(void)
430 {
431 #ifdef HAVE_LIBCRYPTO
432 SSL_load_error_strings();
433 SSLeay_add_ssl_algorithms();
434
435 if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
436 {
437 const char *s;
438
439 fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
440 s = ERR_lib_error_string(ERR_get_error()));
441 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
442 }
443
444 SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
445 SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
446 SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
447 always_accept_verify_cb);
448
449 if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
450 {
451 const char *s;
452
453 fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
454 s = ERR_lib_error_string(ERR_get_error()));
455 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
456 }
457
458 SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
459 SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
460 SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
461 always_accept_verify_cb);
462 #endif /* HAVE_LIBCRYPTO */
463 }
464
465 int
466 main(int argc, char *argv[])
467 {
468 /* Check to see if the user is running us as root, which is a nono */
469 if (geteuid() == 0)
470 {
471 fprintf(stderr, "Don't run ircd as root!!!\n");
472 return -1;
473 }
474
475 /* Setup corefile size immediately after boot -kre */
476 setup_corefile();
477
478 /* save server boot time right away, so getrusage works correctly */
479 set_time();
480
481 /* It ain't random, but it ought to be a little harder to guess */
482 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
483
484 me.localClient = &meLocalUser;
485 dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
486 of Client list */
487 /* Initialise the channel capability usage counts... */
488 init_chcap_usage_counts();
489
490 ConfigFileEntry.dpath = DPATH;
491 ConfigFileEntry.configfile = CPATH; /* Server configuration file */
492 ConfigFileEntry.klinefile = KPATH; /* Server kline file */
493 ConfigFileEntry.glinefile = GPATH; /* Server gline file */
494 ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
495 ConfigFileEntry.dlinefile = DLPATH; /* dline file */
496 ConfigFileEntry.resvfile = RESVPATH; /* resv file */
497
498 myargv = argv;
499 umask(077); /* better safe than sorry --SRB */
500
501 parseargs(&argc, &argv, myopts);
502
503 if (printVersion)
504 {
505 printf("ircd: version %s(%s)\n", ircd_version, serno);
506 exit(EXIT_SUCCESS);
507 }
508
509 if (chdir(ConfigFileEntry.dpath))
510 {
511 perror("chdir");
512 exit(EXIT_FAILURE);
513 }
514
515 ssl_init();
516
517 if (!server_state.foreground)
518 {
519 make_daemon();
520 close_standard_fds(); /* this needs to be before init_netio()! */
521 }
522 else
523 print_startup(getpid());
524
525 setup_signals();
526
527 /* Init the event subsystem */
528 eventInit();
529
530 /* We need this to initialise the fd array before anything else */
531 fdlist_init();
532 log_set_file(LOG_TYPE_IRCD, 0, logFileName);
533 check_can_use_v6();
534 init_netio(); /* This needs to be setup early ! -- adrian */
535
536 /* Check if there is pidfile and daemon already running */
537 check_pidfile(pidFileName);
538
539 mp_pool_init();
540 init_dlink_nodes();
541 init_isupport();
542 dbuf_init();
543 hash_init();
544 init_ip_hash_table(); /* client host ip hash table */
545 init_host_hash(); /* Host-hashtable. */
546 client_init();
547 class_init();
548 whowas_init();
549 watch_init();
550 auth_init(); /* Initialise the auth code */
551 init_resolver(); /* Needs to be setup before the io loop */
552 modules_init();
553 read_conf_files(1); /* cold start init conf files */
554 init_uid();
555 initialize_server_capabs(); /* Set up default_server_capabs */
556 initialize_global_set_options();
557 channel_init();
558 read_links_file();
559 motd_init();
560 #ifdef HAVE_LIBGEOIP
561 geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
562 #endif
563
564 if (EmptyString(ServerInfo.sid))
565 {
566 ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
567 exit(EXIT_FAILURE);
568 }
569
570 strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
571
572 if (EmptyString(ServerInfo.name))
573 {
574 ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
575 exit(EXIT_FAILURE);
576 }
577
578 strlcpy(me.name, ServerInfo.name, sizeof(me.name));
579
580 /* serverinfo{} description must exist. If not, error out.*/
581 if (EmptyString(ServerInfo.description))
582 {
583 ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
584 exit(EXIT_FAILURE);
585 }
586
587 strlcpy(me.info, ServerInfo.description, sizeof(me.info));
588
589 me.from = &me;
590 me.servptr = &me;
591 me.localClient->lasttime = CurrentTime;
592 me.localClient->since = CurrentTime;
593 me.localClient->firsttime = CurrentTime;
594
595 SetMe(&me);
596 make_server(&me);
597
598 hash_add_id(&me);
599 hash_add_client(&me);
600
601 /* add ourselves to global_serv_list */
602 dlinkAdd(&me, make_dlink_node(), &global_serv_list);
603
604 load_kline_database();
605 load_dline_database();
606 load_gline_database();
607 load_xline_database();
608 load_resv_database();
609
610 if (chdir(MODPATH))
611 {
612 ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
613 exit(EXIT_FAILURE);
614 }
615
616 load_all_modules(1);
617 load_conf_modules();
618 load_core_modules(1);
619
620 /* Go back to DPATH after checking to see if we can chdir to MODPATH */
621 if (chdir(ConfigFileEntry.dpath))
622 {
623 perror("chdir");
624 exit(EXIT_FAILURE);
625 }
626
627 /*
628 * assemble_umode_buffer() has to be called after
629 * reading conf/loading modules.
630 */
631 assemble_umode_buffer();
632
633 write_pidfile(pidFileName);
634
635 ilog(LOG_TYPE_IRCD, "Server Ready");
636
637 eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
638 eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
639
640 /* We want try_connections to be called as soon as possible now! -- adrian */
641 /* No, 'cause after a restart it would cause all sorts of nick collides */
642 eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
643
644 /* Setup the timeout check. I'll shift it later :) -- adrian */
645 eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
646
647 eventAddIsh("save_all_databases", save_all_databases, NULL, DATABASE_UPDATE_TIMEOUT);
648
649 if (ConfigServerHide.links_delay > 0)
650 eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
651 else
652 ConfigServerHide.links_disabled = 1;
653
654 if (splitmode)
655 eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
656
657 io_loop();
658 return 0;
659 }

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