/[svn]/ircd-hybrid-7.2/src/ircd.c
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Contents of /ircd-hybrid-7.2/src/ircd.c

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Revision 1022 - (show annotations)
Fri Oct 30 02:30:29 2009 UTC (10 years, 9 months ago) by michael
File MIME type: text/x-chdr
File size: 17507 byte(s)
- remove pointless check_class() call on ircd initialization

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 "common.h"
33 #include "event.h"
34 #include "fdlist.h"
35 #include "hash.h"
36 #include "irc_string.h"
37 #include "sprintf_irc.h"
38 #include "ircd_signal.h"
39 #include "s_gline.h"
40 #include "motd.h"
41 #include "ircd_handler.h"
42 #include "msg.h" /* msgtab */
43 #include "hostmask.h"
44 #include "numeric.h"
45 #include "packet.h"
46 #include "parse.h"
47 #include "irc_res.h"
48 #include "restart.h"
49 #include "rng_mt.h"
50 #include "s_auth.h"
51 #include "s_bsd.h"
52 #include "s_conf.h"
53 #include "s_log.h"
54 #include "s_misc.h"
55 #include "s_serv.h" /* try_connections */
56 #include "send.h"
57 #include "whowas.h"
58 #include "modules.h"
59 #include "memory.h"
60 #include "hook.h"
61 #include "ircd_getopt.h"
62 #include "balloc.h"
63 #include "motd.h"
64 #include "supported.h"
65 #include "watch.h"
66
67 /* Try and find the correct name to use with getrlimit() for setting the max.
68 * number of files allowed to be open by this process.
69 */
70
71 /* /quote set variables */
72 struct SetOptions GlobalSetOptions;
73
74 /* configuration set from ircd.conf */
75 struct config_file_entry ConfigFileEntry;
76 /* server info set from ircd.conf */
77 struct server_info ServerInfo;
78 /* admin info set from ircd.conf */
79 struct admin_info AdminInfo = { NULL, NULL, NULL };
80 struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0 };
81 struct ServerState_t server_state = { 0 };
82 struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} };
83 struct ServerStatistics ServerStats;
84 struct timeval SystemTime;
85 struct Client me; /* That's me */
86 struct LocalUser meLocalUser; /* That's also part of me */
87
88 const char *logFileName = LPATH;
89 const char *pidFileName = PPATH;
90
91 char **myargv;
92 char ircd_platform[PLATFORMLEN];
93
94 int dorehash = 0;
95 int doremotd = 0;
96
97 /* Set to zero because it should be initialized later using
98 * initialize_server_capabs
99 */
100 int default_server_capabs = 0;
101
102 #ifdef HAVE_LIBCRYPTO
103 int bio_spare_fd = -1;
104 #endif
105
106 unsigned int splitmode;
107 unsigned int splitchecking;
108 unsigned int split_users;
109 unsigned int split_servers;
110
111 /* Do klines the same way hybrid-6 did them, i.e. at the
112 * top of the next io_loop instead of in the same loop as
113 * the klines are being applied.
114 *
115 * This should fix strange CPU starvation as very indirectly reported.
116 * (Why do you people not email bug reports? WHY? WHY?)
117 *
118 * - Dianora
119 */
120
121 int rehashed_klines = 0;
122
123
124 /*
125 * print_startup - print startup information
126 */
127 static void
128 print_startup(int pid)
129 {
130 printf("ircd: version %s\n", ircd_version);
131 printf("ircd: pid %d\n", pid);
132 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
133 : "foreground", ConfigFileEntry.dpath);
134 }
135
136 static void
137 make_daemon(void)
138 {
139 int pid;
140
141 if ((pid = fork()) < 0)
142 {
143 perror("fork");
144 exit(EXIT_FAILURE);
145 }
146 else if (pid > 0)
147 {
148 print_startup(pid);
149 exit(EXIT_SUCCESS);
150 }
151
152 setsid();
153 }
154
155 static int printVersion = 0;
156
157 struct lgetopt myopts[] = {
158 {"dlinefile", &ConfigFileEntry.dlinefile,
159 STRING, "File to use for dline.conf"},
160 {"configfile", &ConfigFileEntry.configfile,
161 STRING, "File to use for ircd.conf"},
162 {"klinefile", &ConfigFileEntry.klinefile,
163 STRING, "File to use for kline.conf"},
164 {"xlinefile", &ConfigFileEntry.xlinefile,
165 STRING, "File to use for xline.conf"},
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 static char to_send[200];
182 struct timeval newtime;
183 newtime.tv_sec = 0;
184 newtime.tv_usec = 0;
185
186 if (gettimeofday(&newtime, NULL) == -1)
187 {
188 ilog(L_ERROR, "Clock Failure (%s), TS can be corrupted",
189 strerror(errno));
190 sendto_realops_flags(UMODE_ALL, L_ALL,
191 "Clock Failure (%s), TS can be corrupted",
192 strerror(errno));
193 restart("Clock Failure");
194 }
195
196 if (newtime.tv_sec < CurrentTime)
197 {
198 ircsprintf(to_send, "System clock is running backwards - (%lu < %lu)",
199 (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
200 report_error(L_ALL, to_send, me.name, 0);
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 == 1)
212 {
213 /*
214 * Maybe we want a flags word?
215 * ie. if (REHASHED_KLINES(global_flags))
216 * SET_REHASHED_KLINES(global_flags)
217 * CLEAR_REHASHED_KLINES(global_flags)
218 *
219 * - Dianora
220 */
221 if (rehashed_klines)
222 {
223 check_conf_klines();
224 rehashed_klines = 0;
225 }
226
227 if (listing_client_list.head)
228 {
229 dlink_node *ptr = NULL, *ptr_next = NULL;
230 DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
231 {
232 struct Client *client_p = ptr->data;
233 assert(client_p->localClient->list_task);
234 safe_list_channels(client_p, client_p->localClient->list_task, 0);
235 }
236 }
237
238 /* Run pending events, then get the number of seconds to the next
239 * event
240 */
241 while (eventNextTime() <= CurrentTime)
242 eventRun();
243
244 comm_select();
245 exit_aborted_clients();
246 free_exited_clients();
247 send_queued_all();
248
249 /* Check to see whether we have to rehash the configuration .. */
250 if (dorehash)
251 {
252 rehash(1);
253 dorehash = 0;
254 }
255 if (doremotd)
256 {
257 read_message_file(&ConfigFileEntry.motd);
258 sendto_realops_flags(UMODE_ALL, L_ALL,
259 "Got signal SIGUSR1, reloading ircd motd file");
260 doremotd = 0;
261 }
262 }
263 }
264
265 /* initalialize_global_set_options()
266 *
267 * inputs - none
268 * output - none
269 * side effects - This sets all global set options needed
270 */
271 static void
272 initialize_global_set_options(void)
273 {
274 memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
275
276 GlobalSetOptions.autoconn = 1;
277 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
278 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
279
280 if (ConfigFileEntry.default_floodcount)
281 GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
282 else
283 GlobalSetOptions.floodcount = 10;
284
285 /* XXX I have no idea what to try here - Dianora */
286 GlobalSetOptions.joinfloodcount = 16;
287 GlobalSetOptions.joinfloodtime = 8;
288
289 split_servers = ConfigChannel.default_split_server_count;
290 split_users = ConfigChannel.default_split_user_count;
291
292 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
293 ConfigChannel.no_join_on_split))
294 {
295 splitmode = 1;
296 splitchecking = 1;
297 }
298
299 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
300 GlobalSetOptions.idletime = ConfigFileEntry.idletime;
301 /* End of global set options */
302 }
303
304 /* initialize_message_files()
305 *
306 * inputs - none
307 * output - none
308 * side effects - Set up all message files needed, motd etc.
309 */
310 static void
311 initialize_message_files(void)
312 {
313 init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
314 init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
315 init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
316
317 read_message_file(&ConfigFileEntry.motd);
318 read_message_file(&ConfigFileEntry.opermotd);
319 read_message_file(&ConfigFileEntry.linksfile);
320
321 init_isupport();
322 }
323
324 /* initialize_server_capabs()
325 *
326 * inputs - none
327 * output - none
328 */
329 static void
330 initialize_server_capabs(void)
331 {
332 add_capability("QS", CAP_QS, 1);
333 add_capability("EOB", CAP_EOB, 1);
334
335 if (ServerInfo.sid != NULL) /* only enable TS6 if we have an SID */
336 add_capability("TS6", CAP_TS6, 0);
337
338 add_capability("ZIP", CAP_ZIP, 0);
339 add_capability("CLUSTER", CAP_CLUSTER, 1);
340 #ifdef HALFOPS
341 add_capability("HOPS", CAP_HOPS, 1);
342 #endif
343 }
344
345 /* write_pidfile()
346 *
347 * inputs - filename+path of pid file
348 * output - NONE
349 * side effects - write the pid of the ircd to filename
350 */
351 static void
352 write_pidfile(const char *filename)
353 {
354 FBFILE *fb;
355
356 if ((fb = fbopen(filename, "w")))
357 {
358 char buff[32];
359 unsigned int pid = (unsigned int)getpid();
360 size_t nbytes = ircsprintf(buff, "%u\n", pid);
361
362 if ((fbputs(buff, fb, nbytes) == -1))
363 ilog(L_ERROR, "Error writing %u to pid file %s (%s)",
364 pid, filename, strerror(errno));
365
366 fbclose(fb);
367 return;
368 }
369 else
370 {
371 ilog(L_ERROR, "Error opening pid file %s", filename);
372 }
373 }
374
375 /* check_pidfile()
376 *
377 * inputs - filename+path of pid file
378 * output - none
379 * side effects - reads pid from pidfile and checks if ircd is in process
380 * list. if it is, gracefully exits
381 * -kre
382 */
383 static void
384 check_pidfile(const char *filename)
385 {
386 FBFILE *fb;
387 char buff[32];
388 pid_t pidfromfile;
389
390 /* Don't do logging here, since we don't have log() initialised */
391 if ((fb = fbopen(filename, "r")))
392 {
393 if (fbgets(buff, 20, fb) == NULL)
394 {
395 /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
396 * strerror(errno));
397 */
398 }
399 else
400 {
401 pidfromfile = atoi(buff);
402
403 if (!kill(pidfromfile, 0))
404 {
405 /* log(L_ERROR, "Server is already running"); */
406 printf("ircd: daemon is already running\n");
407 exit(-1);
408 }
409 }
410
411 fbclose(fb);
412 }
413 else if (errno != ENOENT)
414 {
415 /* log(L_ERROR, "Error opening pid file %s", filename); */
416 }
417 }
418
419 /* setup_corefile()
420 *
421 * inputs - nothing
422 * output - nothing
423 * side effects - setups corefile to system limits.
424 * -kre
425 */
426 static void
427 setup_corefile(void)
428 {
429 #ifdef HAVE_SYS_RESOURCE_H
430 struct rlimit rlim; /* resource limits */
431
432 /* Set corefilesize to maximum */
433 if (!getrlimit(RLIMIT_CORE, &rlim))
434 {
435 rlim.rlim_cur = rlim.rlim_max;
436 setrlimit(RLIMIT_CORE, &rlim);
437 }
438 #endif
439 }
440
441 /* init_ssl()
442 *
443 * inputs - nothing
444 * output - nothing
445 * side effects - setups SSL context.
446 */
447 static void
448 init_ssl(void)
449 {
450 #ifdef HAVE_LIBCRYPTO
451 SSL_load_error_strings();
452 SSLeay_add_ssl_algorithms();
453
454 if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
455 {
456 const char *s;
457
458 fprintf(stderr, "ERROR: Could not initialize the SSL context -- %s\n",
459 s = ERR_lib_error_string(ERR_get_error()));
460 ilog(L_CRIT, "ERROR: Could not initialize the SSL context -- %s\n", s);
461 }
462
463 SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2);
464 SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
465 SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_NONE, NULL);
466
467 bio_spare_fd = save_spare_fd("SSL private key validation");
468 #endif /* HAVE_LIBCRYPTO */
469 }
470
471 /* init_callbacks()
472 *
473 * inputs - nothing
474 * output - nothing
475 * side effects - setups standard hook points
476 */
477 static void
478 init_callbacks(void)
479 {
480 iorecv_cb = register_callback("iorecv", iorecv_default);
481 iosend_cb = register_callback("iosend", iosend_default);
482 iorecvctrl_cb = register_callback("iorecvctrl", NULL);
483 iosendctrl_cb = register_callback("iosendctrl", NULL);
484 }
485
486 int
487 main(int argc, char *argv[])
488 {
489 /* Check to see if the user is running
490 * us as root, which is a nono
491 */
492 if (geteuid() == 0)
493 {
494 fprintf(stderr, "Don't run ircd as root!!!\n");
495 return -1;
496 }
497
498 /* Setup corefile size immediately after boot -kre */
499 setup_corefile();
500
501 /* save server boot time right away, so getrusage works correctly */
502 set_time();
503
504 /* It ain't random, but it ought to be a little harder to guess */
505 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
506
507 memset(&me, 0, sizeof(me));
508 memset(&meLocalUser, 0, sizeof(meLocalUser));
509 me.localClient = &meLocalUser;
510 dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
511 of Client list */
512
513 memset(&ServerInfo, 0, sizeof(ServerInfo));
514 memset(&ServerStats, 0, sizeof(ServerStats));
515
516 /* Initialise the channel capability usage counts... */
517 init_chcap_usage_counts();
518
519 ConfigFileEntry.dpath = DPATH;
520 ConfigFileEntry.configfile = CPATH; /* Server configuration file */
521 ConfigFileEntry.klinefile = KPATH; /* Server kline file */
522 ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
523 ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
524 ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
525 ConfigFileEntry.dlinefile = DLPATH; /* dline file */
526 ConfigFileEntry.glinefile = GPATH; /* gline log file */
527 ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
528 ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
529 myargv = argv;
530 umask(077); /* better safe than sorry --SRB */
531
532 parseargs(&argc, &argv, myopts);
533
534 if (printVersion)
535 {
536 printf("ircd: version %s\n", ircd_version);
537 exit(EXIT_SUCCESS);
538 }
539
540 if (chdir(ConfigFileEntry.dpath))
541 {
542 perror("chdir");
543 exit(EXIT_FAILURE);
544 }
545
546 init_ssl();
547
548 if (!server_state.foreground)
549 {
550 make_daemon();
551 close_standard_fds(); /* this needs to be before init_netio()! */
552 }
553 else
554 print_startup(getpid());
555
556 setup_signals();
557
558 get_ircd_platform(ircd_platform);
559
560 /* Init the event subsystem */
561 eventInit();
562 /* We need this to initialise the fd array before anything else */
563 fdlist_init();
564 init_log(logFileName);
565 check_can_use_v6();
566 init_comm(); /* This needs to be setup early ! -- adrian */
567 /* Check if there is pidfile and daemon already running */
568 check_pidfile(pidFileName);
569
570 initBlockHeap();
571 init_dlink_nodes();
572 init_callbacks();
573 initialize_message_files();
574 dbuf_init();
575 init_hash();
576 init_ip_hash_table(); /* client host ip hash table */
577 init_host_hash(); /* Host-hashtable. */
578 clear_tree_parse();
579 init_client();
580 init_class();
581 init_whowas();
582 watch_init();
583 init_auth(); /* Initialise the auth code */
584 init_resolver(); /* Needs to be setup before the io loop */
585 read_conf_files(1); /* cold start init conf files */
586 me.id[0] = '\0';
587 init_uid();
588 initialize_server_capabs(); /* Set up default_server_capabs */
589 initialize_global_set_options();
590 init_channels();
591
592 if (ServerInfo.name == NULL)
593 {
594 ilog(L_CRIT, "No server name specified in serverinfo block.");
595 exit(EXIT_FAILURE);
596 }
597
598 strlcpy(me.name, ServerInfo.name, sizeof(me.name));
599
600 /* serverinfo{} description must exist. If not, error out.*/
601 if (ServerInfo.description == NULL)
602 {
603 ilog(L_CRIT,
604 "ERROR: No server description specified in serverinfo block.");
605 exit(EXIT_FAILURE);
606 }
607
608 strlcpy(me.info, ServerInfo.description, sizeof(me.info));
609
610 me.from = &me;
611 me.servptr = &me;
612
613 SetMe(&me);
614 make_server(&me);
615
616 me.lasttime = me.since = me.firsttime = CurrentTime;
617 hash_add_client(&me);
618
619 /* add ourselves to global_serv_list */
620 dlinkAdd(&me, make_dlink_node(), &global_serv_list);
621
622 #ifndef STATIC_MODULES
623 if (chdir(MODPATH))
624 {
625 ilog (L_CRIT, "Could not load core modules. Terminating!");
626 exit(EXIT_FAILURE);
627 }
628
629 load_all_modules(1);
630 load_conf_modules();
631 load_core_modules(1);
632 /* Go back to DPATH after checking to see if we can chdir to MODPATH */
633 chdir(ConfigFileEntry.dpath);
634 #else
635 load_all_modules(1);
636 #endif
637 /*
638 * assemble_umode_buffer() has to be called after
639 * reading conf/loading modules.
640 */
641 assemble_umode_buffer();
642
643 write_pidfile(pidFileName);
644
645 ilog(L_NOTICE, "Server Ready");
646
647 eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
648 eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
649
650 /* We want try_connections to be called as soon as possible now! -- adrian */
651 /* No, 'cause after a restart it would cause all sorts of nick collides */
652 eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
653
654 eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
655
656 /* Setup the timeout check. I'll shift it later :) -- adrian */
657 eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
658
659 if (ConfigServerHide.links_delay > 0)
660 eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
661 else
662 ConfigServerHide.links_disabled = 1;
663
664 if (splitmode)
665 eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
666
667 io_loop();
668 return 0;
669 }

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