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root/svn/ircd-hybrid/branches/8.2.x/src/ircd.c
Revision: 5449
Committed: Sat Jan 31 19:32:11 2015 UTC (9 years, 2 months ago) by michael
Content type: text/x-csrc
File size: 16776 byte(s)
Log Message:
- ircd.c:main(): removed pointless chdir() calls as spotted by Adam

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 timeval SystemTime;
67 struct Client me; /* That's me */
68 struct Connection meConnection; /* That's also part of me */
69
70 const char *logFileName = LPATH;
71 const char *pidFileName = PPATH;
72
73 char **myargv;
74
75 int dorehash = 0;
76 int doremotd = 0;
77
78 /* Set to zero because it should be initialized later using
79 * initialize_server_capabs
80 */
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.autoconn = 1;
264 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
265 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
266
267 if (ConfigGeneral.default_floodcount)
268 GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
269 else
270 GlobalSetOptions.floodcount = 10;
271
272 /* XXX I have no idea what to try here - Dianora */
273 GlobalSetOptions.joinfloodcount = 16;
274 GlobalSetOptions.joinfloodtime = 8;
275
276 split_servers = ConfigChannel.default_split_server_count;
277 split_users = ConfigChannel.default_split_user_count;
278
279 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
280 ConfigChannel.no_join_on_split))
281 {
282 splitmode = 1;
283 splitchecking = 1;
284 }
285
286 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
287 }
288
289 /* initialize_server_capabs()
290 *
291 * inputs - none
292 * output - none
293 */
294 static void
295 initialize_server_capabs(void)
296 {
297 add_capability("QS", CAP_QS, 1);
298 add_capability("EOB", CAP_EOB, 1);
299 add_capability("TS6", CAP_TS6, 0);
300 add_capability("CLUSTER", CAP_CLUSTER, 1);
301 add_capability("SVS", CAP_SVS, 1);
302 add_capability("CHW", CAP_CHW, 1);
303 add_capability("HOPS", CAP_HOPS, 1);
304 }
305
306 /* write_pidfile()
307 *
308 * inputs - filename+path of pid file
309 * output - NONE
310 * side effects - write the pid of the ircd to filename
311 */
312 static void
313 write_pidfile(const char *filename)
314 {
315 FILE *fb;
316
317 if ((fb = fopen(filename, "w")))
318 {
319 char buff[IRCD_BUFSIZE];
320 unsigned int pid = (unsigned int)getpid();
321
322 snprintf(buff, sizeof(buff), "%u\n", pid);
323
324 if (fputs(buff, fb) == -1)
325 ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
326 pid, filename, strerror(errno));
327
328 fclose(fb);
329 }
330 else
331 {
332 ilog(LOG_TYPE_IRCD, "Error opening pid file %s (%s)",
333 filename, strerror(errno));
334 }
335 }
336
337 /* check_pidfile()
338 *
339 * inputs - filename+path of pid file
340 * output - none
341 * side effects - reads pid from pidfile and checks if ircd is in process
342 * list. if it is, gracefully exits
343 * -kre
344 */
345 static void
346 check_pidfile(const char *filename)
347 {
348 FILE *fb;
349 char buff[IRCD_BUFSIZE];
350 pid_t pidfromfile;
351
352 /* Don't do logging here, since we don't have log() initialised */
353 if ((fb = fopen(filename, "r")))
354 {
355 if (!fgets(buff, 20, fb))
356 {
357 /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
358 * strerror(errno));
359 */
360 }
361 else
362 {
363 pidfromfile = atoi(buff);
364
365 if (!kill(pidfromfile, 0))
366 {
367 /* log(L_ERROR, "Server is already running"); */
368 printf("ircd: daemon is already running\n");
369 exit(-1);
370 }
371 }
372
373 fclose(fb);
374 }
375 else if (errno != ENOENT)
376 {
377 /* log(L_ERROR, "Error opening pid file %s", filename); */
378 }
379 }
380
381 /* setup_corefile()
382 *
383 * inputs - nothing
384 * output - nothing
385 * side effects - setups corefile to system limits.
386 * -kre
387 */
388 static void
389 setup_corefile(void)
390 {
391 #ifdef HAVE_SYS_RESOURCE_H
392 struct rlimit rlim; /* resource limits */
393
394 /* Set corefilesize to maximum */
395 if (!getrlimit(RLIMIT_CORE, &rlim))
396 {
397 rlim.rlim_cur = rlim.rlim_max;
398 setrlimit(RLIMIT_CORE, &rlim);
399 }
400 #endif
401 }
402
403 #ifdef HAVE_LIBCRYPTO
404 static int
405 always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
406 {
407 return 1;
408 }
409 #endif
410
411 /* init_ssl()
412 *
413 * inputs - nothing
414 * output - nothing
415 * side effects - setups SSL context.
416 */
417 static void
418 ssl_init(void)
419 {
420 #ifdef HAVE_LIBCRYPTO
421 SSL_load_error_strings();
422 SSLeay_add_ssl_algorithms();
423
424 if (!(ConfigServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())))
425 {
426 const char *s = ERR_lib_error_string(ERR_get_error());
427
428 fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
429 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s", s);
430 exit(EXIT_FAILURE);
431 return; /* Not reached */
432 }
433
434 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
435 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_DH_USE|SSL_OP_CIPHER_SERVER_PREFERENCE);
436 SSL_CTX_set_verify(ConfigServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
437 always_accept_verify_cb);
438 SSL_CTX_set_session_cache_mode(ConfigServerInfo.server_ctx, SSL_SESS_CACHE_OFF);
439 SSL_CTX_set_cipher_list(ConfigServerInfo.server_ctx, "EECDH+HIGH:EDH+HIGH:HIGH:!aNULL");
440
441 #if OPENSSL_VERSION_NUMBER >= 0x009080FFL && !defined(OPENSSL_NO_ECDH)
442 {
443 EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
444
445 if (key)
446 {
447 SSL_CTX_set_tmp_ecdh(ConfigServerInfo.server_ctx, key);
448 EC_KEY_free(key);
449 }
450 }
451
452 SSL_CTX_set_options(ConfigServerInfo.server_ctx, SSL_OP_SINGLE_ECDH_USE);
453 #endif
454
455 if (!(ConfigServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())))
456 {
457 const char *s = ERR_lib_error_string(ERR_get_error());
458
459 fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
460 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s", s);
461 exit(EXIT_FAILURE);
462 return; /* Not reached */
463 }
464
465 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TICKET);
466 SSL_CTX_set_options(ConfigServerInfo.client_ctx, SSL_OP_SINGLE_DH_USE);
467 SSL_CTX_set_verify(ConfigServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
468 always_accept_verify_cb);
469 SSL_CTX_set_session_cache_mode(ConfigServerInfo.client_ctx, SSL_SESS_CACHE_OFF);
470 #endif /* HAVE_LIBCRYPTO */
471 }
472
473 int
474 main(int argc, char *argv[])
475 {
476 /* Check to see if the user is running us as root, which is a nono */
477 if (!geteuid())
478 {
479 fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
480 return -1;
481 }
482
483 /* Setup corefile size immediately after boot -kre */
484 setup_corefile();
485
486 /* save server boot time right away, so getrusage works correctly */
487 set_time();
488
489 /* It ain't random, but it ought to be a little harder to guess */
490 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
491
492 me.connection = &meConnection;
493 dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
494 of Client list */
495 ConfigLog.use_logging = 1;
496 ConfigGeneral.dpath = DPATH;
497 ConfigGeneral.spath = SPATH;
498 ConfigGeneral.mpath = MPATH;
499 ConfigGeneral.configfile = CPATH; /* Server configuration file */
500 ConfigGeneral.klinefile = KPATH; /* Server kline file */
501 ConfigGeneral.glinefile = GPATH; /* Server gline file */
502 ConfigGeneral.xlinefile = XPATH; /* Server xline file */
503 ConfigGeneral.dlinefile = DLPATH; /* dline file */
504 ConfigGeneral.resvfile = RESVPATH; /* resv file */
505
506 myargv = argv;
507 umask(077); /* better safe than sorry --SRB */
508
509 parseargs(&argc, &argv, myopts);
510
511 if (printVersion)
512 {
513 printf("ircd: version %s(%s)\n", ircd_version, serno);
514 exit(EXIT_SUCCESS);
515 }
516
517 if (chdir(ConfigGeneral.dpath))
518 {
519 perror("chdir");
520 exit(EXIT_FAILURE);
521 }
522
523 ssl_init();
524
525 if (!server_state.foreground)
526 {
527 make_daemon();
528 close_standard_fds(); /* this needs to be before init_netio()! */
529 }
530 else
531 print_startup(getpid());
532
533 setup_signals();
534
535 /* We need this to initialise the fd array before anything else */
536 fdlist_init();
537 log_set_file(LOG_TYPE_IRCD, 0, logFileName);
538
539 init_netio(); /* This needs to be setup early ! -- adrian */
540
541 /* Check if there is pidfile and daemon already running */
542 check_pidfile(pidFileName);
543
544 mp_pool_init();
545 init_dlink_nodes();
546 init_isupport();
547 dbuf_init();
548 hash_init();
549 ipcache_init();
550 client_init();
551 class_init();
552 whowas_init();
553 watch_init();
554 auth_init(); /* Initialise the auth code */
555 init_resolver(); /* Needs to be setup before the io loop */
556 modules_init();
557 read_conf_files(1); /* cold start init conf files */
558 init_uid();
559 initialize_server_capabs(); /* Set up default_server_capabs */
560 initialize_global_set_options();
561 channel_init();
562 read_links_file();
563 motd_init();
564 user_usermodes_init();
565 #ifdef HAVE_LIBGEOIP
566 geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
567 #endif
568
569 if (EmptyString(ConfigServerInfo.sid))
570 {
571 ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
572 exit(EXIT_FAILURE);
573 }
574
575 strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
576
577 if (EmptyString(ConfigServerInfo.name))
578 {
579 ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
580 exit(EXIT_FAILURE);
581 }
582
583 strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
584
585 /* serverinfo{} description must exist. If not, error out.*/
586 if (EmptyString(ConfigServerInfo.description))
587 {
588 ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
589 exit(EXIT_FAILURE);
590 }
591
592 strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
593
594 me.from = &me;
595 me.servptr = &me;
596 me.connection->lasttime = CurrentTime;
597 me.connection->since = CurrentTime;
598 me.connection->firsttime = CurrentTime;
599
600 SetMe(&me);
601 make_server(&me);
602
603 hash_add_id(&me);
604 hash_add_client(&me);
605
606 dlinkAdd(&me, make_dlink_node(), &global_server_list);
607
608 load_kline_database();
609 load_dline_database();
610 load_gline_database();
611 load_xline_database();
612 load_resv_database();
613
614 load_all_modules(1);
615 load_conf_modules();
616 load_core_modules(1);
617
618 write_pidfile(pidFileName);
619
620 ilog(LOG_TYPE_IRCD, "Server Ready");
621
622 event_addish(&event_cleanup_glines, NULL);
623 event_addish(&event_cleanup_tklines, NULL);
624
625 /* We want try_connections to be called as soon as possible now! -- adrian */
626 /* No, 'cause after a restart it would cause all sorts of nick collides */
627 event_addish(&event_try_connections, NULL);
628
629 /* Setup the timeout check. I'll shift it later :) -- adrian */
630 event_add(&event_comm_checktimeouts, NULL);
631
632 event_addish(&event_save_all_databases, NULL);
633
634 if (ConfigServerHide.links_delay > 0)
635 {
636 event_write_links_file.when = ConfigServerHide.links_delay;
637 event_addish(&event_write_links_file, NULL);
638 }
639 else
640 ConfigServerHide.links_disabled = 1;
641
642 if (splitmode)
643 event_addish(&splitmode_event, NULL);
644
645 io_loop();
646 return 0;
647 }

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