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root/svn/ircd-hybrid/trunk/src/ircd.c
Revision: 2980
Committed: Fri Jan 31 19:15:05 2014 UTC (11 years, 6 months ago) by michael
Content type: text/x-csrc
File size: 17335 byte(s)
Log Message:
- ircd.c:set_time(): replaced snprintf/report_error combo with
  ilog/sendto_realops_flags

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2014 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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 "s_user.h"
29 #include "list.h"
30 #include "ircd.h"
31 #include "channel.h"
32 #include "channel_mode.h"
33 #include "client.h"
34 #include "event.h"
35 #include "fdlist.h"
36 #include "hash.h"
37 #include "irc_string.h"
38 #include "ircd_signal.h"
39 #include "s_gline.h"
40 #include "motd.h"
41 #include "conf.h"
42 #include "hostmask.h"
43 #include "numeric.h"
44 #include "packet.h"
45 #include "parse.h"
46 #include "irc_res.h"
47 #include "restart.h"
48 #include "rng_mt.h"
49 #include "s_auth.h"
50 #include "s_bsd.h"
51 #include "log.h"
52 #include "s_misc.h"
53 #include "s_serv.h" /* try_connections */
54 #include "send.h"
55 #include "whowas.h"
56 #include "modules.h"
57 #include "memory.h"
58 #include "mempool.h"
59 #include "hook.h"
60 #include "ircd_getopt.h"
61 #include "supported.h"
62 #include "watch.h"
63 #include "conf_db.h"
64 #include "conf_class.h"
65
66
67 #ifdef HAVE_LIBGEOIP
68 GeoIP *geoip_ctx;
69 #endif
70
71 /* /quote set variables */
72 struct SetOptions GlobalSetOptions;
73 struct Counter Count;
74 struct ServerState_t server_state;
75 struct ServerStatistics ServerStats;
76 struct timeval SystemTime;
77 struct Client me; /* That's me */
78 struct LocalUser meLocalUser; /* That's also part of me */
79
80 const char *logFileName = LPATH;
81 const char *pidFileName = PPATH;
82
83 char **myargv;
84
85 int dorehash = 0;
86 int doremotd = 0;
87
88 /* Set to zero because it should be initialized later using
89 * initialize_server_capabs
90 */
91 int default_server_capabs = 0;
92 unsigned int splitmode;
93 unsigned int splitchecking;
94 unsigned int split_users;
95 unsigned int split_servers;
96
97 /* Do klines the same way hybrid-6 did them, i.e. at the
98 * top of the next io_loop instead of in the same loop as
99 * the klines are being applied.
100 *
101 * This should fix strange CPU starvation as very indirectly reported.
102 * (Why do you people not email bug reports? WHY? WHY?)
103 *
104 * - Dianora
105 */
106
107 int rehashed_klines = 0;
108
109
110 /*
111 * print_startup - print startup information
112 */
113 static void
114 print_startup(int pid)
115 {
116 printf("ircd: version %s(%s)\n", ircd_version, serno);
117 printf("ircd: pid %d\n", pid);
118 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
119 : "foreground", ConfigFileEntry.dpath);
120 }
121
122 static void
123 make_daemon(void)
124 {
125 int pid;
126
127 if ((pid = fork()) < 0)
128 {
129 perror("fork");
130 exit(EXIT_FAILURE);
131 }
132 else if (pid > 0)
133 {
134 print_startup(pid);
135 exit(EXIT_SUCCESS);
136 }
137
138 setsid();
139 }
140
141 static int printVersion = 0;
142
143 static struct lgetopt myopts[] = {
144 {"configfile", &ConfigFileEntry.configfile,
145 STRING, "File to use for ircd.conf"},
146 {"glinefile", &ConfigFileEntry.glinefile,
147 STRING, "File to use for gline database"},
148 {"klinefile", &ConfigFileEntry.klinefile,
149 STRING, "File to use for kline database"},
150 {"dlinefile", &ConfigFileEntry.dlinefile,
151 STRING, "File to use for dline database"},
152 {"xlinefile", &ConfigFileEntry.xlinefile,
153 STRING, "File to use for xline database"},
154 {"resvfile", &ConfigFileEntry.resvfile,
155 STRING, "File to use for resv database"},
156 {"logfile", &logFileName,
157 STRING, "File to use for ircd.log"},
158 {"pidfile", &pidFileName,
159 STRING, "File to use for process ID"},
160 {"foreground", &server_state.foreground,
161 YESNO, "Run in foreground (don't detach)"},
162 {"version", &printVersion,
163 YESNO, "Print version and exit"},
164 {"help", NULL, USAGE, "Print this text"},
165 {NULL, NULL, STRING, NULL},
166 };
167
168 void
169 set_time(void)
170 {
171 struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
172
173 if (gettimeofday(&newtime, NULL) == -1)
174 {
175 ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
176 strerror(errno));
177 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
178 "Clock Failure (%s), TS can be corrupted",
179 strerror(errno));
180 restart("Clock Failure");
181 }
182
183 if (newtime.tv_sec < CurrentTime)
184 {
185 ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
186 (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
187 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
188 "System clock is running backwards - (%lu < %lu)",
189 (unsigned long)newtime.tv_sec,
190 (unsigned long)CurrentTime);
191 set_back_events(CurrentTime - newtime.tv_sec);
192 }
193
194 SystemTime.tv_sec = newtime.tv_sec;
195 SystemTime.tv_usec = newtime.tv_usec;
196 }
197
198 static void
199 io_loop(void)
200 {
201 while (1 == 1)
202 {
203 /*
204 * Maybe we want a flags word?
205 * ie. if (REHASHED_KLINES(global_flags))
206 * SET_REHASHED_KLINES(global_flags)
207 * CLEAR_REHASHED_KLINES(global_flags)
208 *
209 * - Dianora
210 */
211 if (rehashed_klines)
212 {
213 check_conf_klines();
214 rehashed_klines = 0;
215 }
216
217 if (listing_client_list.head)
218 {
219 dlink_node *ptr = NULL, *ptr_next = NULL;
220 DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
221 {
222 struct Client *client_p = ptr->data;
223 assert(client_p->localClient->list_task);
224 safe_list_channels(client_p, client_p->localClient->list_task, 0);
225 }
226 }
227
228 /* Run pending events, then get the number of seconds to the next
229 * event
230 */
231 while (eventNextTime() <= CurrentTime)
232 eventRun();
233
234 comm_select();
235 exit_aborted_clients();
236 free_exited_clients();
237
238 /* Check to see whether we have to rehash the configuration .. */
239 if (dorehash)
240 {
241 rehash(1);
242 dorehash = 0;
243 }
244 if (doremotd)
245 {
246 motd_recache();
247 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
248 "Got signal SIGUSR1, reloading motd files");
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 memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
264
265 GlobalSetOptions.autoconn = 1;
266 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
267 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
268
269 if (ConfigFileEntry.default_floodcount)
270 GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
271 else
272 GlobalSetOptions.floodcount = 10;
273
274 /* XXX I have no idea what to try here - Dianora */
275 GlobalSetOptions.joinfloodcount = 16;
276 GlobalSetOptions.joinfloodtime = 8;
277
278 split_servers = ConfigChannel.default_split_server_count;
279 split_users = ConfigChannel.default_split_user_count;
280
281 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
282 ConfigChannel.no_join_on_split))
283 {
284 splitmode = 1;
285 splitchecking = 1;
286 }
287
288 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
289 /* End of global set options */
290 }
291
292 /* initialize_server_capabs()
293 *
294 * inputs - none
295 * output - none
296 */
297 static void
298 initialize_server_capabs(void)
299 {
300 add_capability("QS", CAP_QS, 1);
301 add_capability("EOB", CAP_EOB, 1);
302 add_capability("TS6", CAP_TS6, 0);
303 add_capability("CLUSTER", CAP_CLUSTER, 1);
304 // add_capability("FAKEHOST", CAP_FAKEHOST, 1);
305 add_capability("SVS", CAP_SVS, 1);
306 #ifdef HALFOPS
307 add_capability("HOPS", CAP_HOPS, 1);
308 #endif
309 }
310
311 /* write_pidfile()
312 *
313 * inputs - filename+path of pid file
314 * output - NONE
315 * side effects - write the pid of the ircd to filename
316 */
317 static void
318 write_pidfile(const char *filename)
319 {
320 FILE *fb;
321
322 if ((fb = fopen(filename, "w")))
323 {
324 char buff[IRCD_BUFSIZE];
325 unsigned int pid = (unsigned int)getpid();
326
327 snprintf(buff, sizeof(buff), "%u\n", pid);
328
329 if ((fputs(buff, fb) == -1))
330 ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
331 pid, filename, strerror(errno));
332
333 fclose(fb);
334 }
335 else
336 {
337 ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
338 }
339 }
340
341 /* check_pidfile()
342 *
343 * inputs - filename+path of pid file
344 * output - none
345 * side effects - reads pid from pidfile and checks if ircd is in process
346 * list. if it is, gracefully exits
347 * -kre
348 */
349 static void
350 check_pidfile(const char *filename)
351 {
352 FILE *fb;
353 char buff[IRCD_BUFSIZE];
354 pid_t pidfromfile;
355
356 /* Don't do logging here, since we don't have log() initialised */
357 if ((fb = fopen(filename, "r")))
358 {
359 if (fgets(buff, 20, fb) == NULL)
360 {
361 /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
362 * strerror(errno));
363 */
364 }
365 else
366 {
367 pidfromfile = atoi(buff);
368
369 if (!kill(pidfromfile, 0))
370 {
371 /* log(L_ERROR, "Server is already running"); */
372 printf("ircd: daemon is already running\n");
373 exit(-1);
374 }
375 }
376
377 fclose(fb);
378 }
379 else if (errno != ENOENT)
380 {
381 /* log(L_ERROR, "Error opening pid file %s", filename); */
382 }
383 }
384
385 /* setup_corefile()
386 *
387 * inputs - nothing
388 * output - nothing
389 * side effects - setups corefile to system limits.
390 * -kre
391 */
392 static void
393 setup_corefile(void)
394 {
395 #ifdef HAVE_SYS_RESOURCE_H
396 struct rlimit rlim; /* resource limits */
397
398 /* Set corefilesize to maximum */
399 if (!getrlimit(RLIMIT_CORE, &rlim))
400 {
401 rlim.rlim_cur = rlim.rlim_max;
402 setrlimit(RLIMIT_CORE, &rlim);
403 }
404 #endif
405 }
406
407 #ifdef HAVE_LIBCRYPTO
408 static int
409 always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
410 {
411 return 1;
412 }
413 #endif
414
415 /* init_ssl()
416 *
417 * inputs - nothing
418 * output - nothing
419 * side effects - setups SSL context.
420 */
421 static void
422 ssl_init(void)
423 {
424 #ifdef HAVE_LIBCRYPTO
425 const unsigned char session_id[] = "ircd-hybrid";
426
427 SSL_load_error_strings();
428 SSLeay_add_ssl_algorithms();
429
430 if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
431 {
432 const char *s;
433
434 fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
435 s = ERR_lib_error_string(ERR_get_error()));
436 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
437 }
438
439 SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
440 SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
441 SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
442 always_accept_verify_cb);
443 SSL_CTX_set_session_id_context(ServerInfo.server_ctx, session_id, sizeof(session_id) - 1);
444
445 if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
446 {
447 const char *s;
448
449 fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
450 s = ERR_lib_error_string(ERR_get_error()));
451 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
452 }
453
454 SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
455 SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
456 SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
457 always_accept_verify_cb);
458 #endif /* HAVE_LIBCRYPTO */
459 }
460
461 int
462 main(int argc, char *argv[])
463 {
464 /* Check to see if the user is running us as root, which is a nono */
465 if (geteuid() == 0)
466 {
467 fprintf(stderr, "Don't run ircd as root!!!\n");
468 return -1;
469 }
470
471 /* Setup corefile size immediately after boot -kre */
472 setup_corefile();
473
474 /* save server boot time right away, so getrusage works correctly */
475 set_time();
476
477 /* It ain't random, but it ought to be a little harder to guess */
478 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
479
480 me.localClient = &meLocalUser;
481 dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
482 of Client list */
483 /* Initialise the channel capability usage counts... */
484 init_chcap_usage_counts();
485
486 ConfigFileEntry.dpath = DPATH;
487 ConfigFileEntry.configfile = CPATH; /* Server configuration file */
488 ConfigFileEntry.klinefile = KPATH; /* Server kline file */
489 ConfigFileEntry.glinefile = GPATH; /* Server gline file */
490 ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
491 ConfigFileEntry.dlinefile = DLPATH; /* dline file */
492 ConfigFileEntry.resvfile = RESVPATH; /* resv file */
493
494 myargv = argv;
495 umask(077); /* better safe than sorry --SRB */
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(ConfigFileEntry.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 /* Init the event subsystem */
524 eventInit();
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 check_can_use_v6();
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 init_ip_hash_table(); /* client host ip hash table */
541 init_host_hash(); /* Host-hashtable. */
542 client_init();
543 class_init();
544 whowas_init();
545 watch_init();
546 auth_init(); /* Initialise the auth code */
547 init_resolver(); /* Needs to be setup before the io loop */
548 modules_init();
549 read_conf_files(1); /* cold start init conf files */
550 init_uid();
551 initialize_server_capabs(); /* Set up default_server_capabs */
552 initialize_global_set_options();
553 channel_init();
554 read_links_file();
555 motd_init();
556 #ifdef HAVE_LIBGEOIP
557 geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
558 #endif
559
560 if (EmptyString(ServerInfo.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, ServerInfo.sid, sizeof(me.id));
567
568 if (EmptyString(ServerInfo.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, ServerInfo.name, sizeof(me.name));
575
576 /* serverinfo{} description must exist. If not, error out.*/
577 if (EmptyString(ServerInfo.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, ServerInfo.description, sizeof(me.info));
584
585 me.from = &me;
586 me.servptr = &me;
587 me.localClient->lasttime = CurrentTime;
588 me.localClient->since = CurrentTime;
589 me.localClient->firsttime = CurrentTime;
590
591 SetMe(&me);
592 make_server(&me);
593
594 hash_add_id(&me);
595 hash_add_client(&me);
596
597 /* add ourselves to global_serv_list */
598 dlinkAdd(&me, make_dlink_node(), &global_serv_list);
599
600 load_kline_database();
601 load_dline_database();
602 load_gline_database();
603 load_xline_database();
604 load_resv_database();
605
606 if (chdir(MODPATH))
607 {
608 ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
609 exit(EXIT_FAILURE);
610 }
611
612 load_all_modules(1);
613 load_conf_modules();
614 load_core_modules(1);
615
616 /* Go back to DPATH after checking to see if we can chdir to MODPATH */
617 if (chdir(ConfigFileEntry.dpath))
618 {
619 perror("chdir");
620 exit(EXIT_FAILURE);
621 }
622
623 /*
624 * assemble_umode_buffer() has to be called after
625 * reading conf/loading modules.
626 */
627 assemble_umode_buffer();
628
629 write_pidfile(pidFileName);
630
631 ilog(LOG_TYPE_IRCD, "Server Ready");
632
633 eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
634 eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
635
636 /* We want try_connections to be called as soon as possible now! -- adrian */
637 /* No, 'cause after a restart it would cause all sorts of nick collides */
638 eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
639
640 /* Setup the timeout check. I'll shift it later :) -- adrian */
641 eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
642
643 eventAddIsh("save_all_databases", save_all_databases, NULL, DATABASE_UPDATE_TIMEOUT);
644
645 if (ConfigServerHide.links_delay > 0)
646 eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
647 else
648 ConfigServerHide.links_disabled = 1;
649
650 if (splitmode)
651 eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
652
653 io_loop();
654 return 0;
655 }

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