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

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Revision 642 - (show annotations)
Wed Jun 7 11:03:17 2006 UTC (15 years, 11 months ago) by michael
File MIME type: text/x-chdr
File size: 18087 byte(s)
- Moved setup_corefile() to libio

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 #ifdef IN_IRCD
26 #include "stdinc.h"
27 #include "s_user.h"
28 #include "ircd.h"
29 #include "channel.h"
30 #include "channel_mode.h"
31 #include "client.h"
32 #include "common.h"
33 #include "hash.h"
34 #include "ircd_signal.h"
35 #include "motd.h"
36 #include "ircd_handler.h"
37 #include "msg.h" /* msgtab */
38 #include "hostmask.h"
39 #include "numeric.h"
40 #include "packet.h"
41 #include "parse.h"
42 #include "restart.h"
43 #include "s_auth.h"
44 #include "s_conf.h"
45 #include "parse_aline.h"
46 #include "s_serv.h"
47 #include "send.h"
48 #include "whowas.h"
49 #include "conf/modules.h"
50 #include "ircd_getopt.h"
51 #include "motd.h"
52 #include "supported.h"
53 #include "watch.h"
54
55 /* Try and find the correct name to use with getrlimit() for setting the max.
56 * number of files allowed to be open by this process.
57 */
58
59 /* /quote set variables */
60 struct SetOptions GlobalSetOptions;
61 struct ServerStatistics ServerStats;
62 /* configuration set from ircd.conf */
63 struct config_file_entry ConfigFileEntry;
64 /* server info set from ircd.conf */
65 struct server_info ServerInfo;
66 /* admin info set from ircd.conf */
67 struct admin_info AdminInfo = { NULL, NULL, NULL };
68 struct Counter Count = { 0, 0, 0, 0, 0, 0, 0, 0 };
69 struct ServerState_t server_state = { 0 };
70 struct logging_entry ConfigLoggingEntry = { 1, {0}, {0}, {0}, {0}, {0}, {0}, {0}, {0} };
71 struct Client me; /* That's me */
72 struct LocalUser meLocalUser; /* That's also part of me */
73 unsigned long connect_id = 0; /* unique connect ID */
74
75 static unsigned long initialVMTop = 0; /* top of virtual memory at init */
76 const char *logFileName = LPATH;
77 const char *pidFileName = PPATH;
78
79 char **myargv;
80 char ircd_platform[PLATFORMLEN];
81
82 int dorehash = 0;
83 int doremotd = 0;
84
85 /* Set to zero because it should be initialized later using
86 * initialize_server_capabs
87 */
88 int default_server_capabs = 0;
89
90 #ifdef HAVE_LIBCRYPTO
91 int bio_spare_fd = -1;
92 #endif
93
94 int splitmode;
95 int splitchecking;
96 int split_users;
97 unsigned int split_servers;
98
99 static dlink_node *fdlimit_hook;
100
101 /* Do klines the same way hybrid-6 did them, i.e. at the
102 * top of the next io_loop instead of in the same loop as
103 * the klines are being applied.
104 *
105 * This should fix strange CPU starvation as very indirectly reported.
106 * (Why do you people not email bug reports? WHY? WHY?)
107 *
108 * - Dianora
109 */
110
111 int rehashed_klines = 0;
112
113 /*
114 * get_vm_top - get the operating systems notion of the resident set size
115 */
116 #ifndef _WIN32
117 static unsigned long
118 get_vm_top(void)
119 {
120 /*
121 * NOTE: sbrk is not part of the ANSI C library or the POSIX.1 standard
122 * however it seems that everyone defines it. Calling sbrk with a 0
123 * argument will return a pointer to the top of the process virtual
124 * memory without changing the process size, so this call should be
125 * reasonably safe (sbrk returns the new value for the top of memory).
126 * This code relies on the notion that the address returned will be an
127 * offset from 0 (NULL), so the result of sbrk is cast to a size_t and
128 * returned. We really shouldn't be using it here but...
129 */
130
131 void *vptr = sbrk(0);
132 return (unsigned long)vptr;
133 }
134
135 /*
136 * print_startup - print startup information
137 */
138 static void
139 print_startup(int pid)
140 {
141 printf("ircd: version %s\n", ircd_version);
142 printf("ircd: pid %d\n", pid);
143 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
144 : "foreground", ConfigFileEntry.dpath);
145 }
146
147 static void
148 make_daemon(void)
149 {
150 int pid;
151
152 if ((pid = fork()) < 0)
153 {
154 perror("fork");
155 exit(EXIT_FAILURE);
156 }
157 else if (pid > 0)
158 {
159 print_startup(pid);
160 exit(EXIT_SUCCESS);
161 }
162
163 setsid();
164 }
165 #endif
166
167 /*
168 * get_maxrss - get the operating systems notion of the resident set size
169 */
170 unsigned long
171 get_maxrss(void)
172 {
173 #ifdef _WIN32
174 return (0); /* FIXME */
175 #else
176 return (get_vm_top() - initialVMTop);
177 #endif
178 }
179
180 static int printVersion = 0;
181
182 struct lgetopt myopts[] = {
183 {"dlinefile", &ConfigFileEntry.dlinefile,
184 STRING, "File to use for dline.conf"},
185 {"configfile", &ConfigFileEntry.configfile,
186 STRING, "File to use for ircd.conf"},
187 {"klinefile", &ConfigFileEntry.klinefile,
188 STRING, "File to use for kline.conf"},
189 {"xlinefile", &ConfigFileEntry.xlinefile,
190 STRING, "File to use for xline.conf"},
191 {"logfile", &logFileName,
192 STRING, "File to use for ircd.log"},
193 {"pidfile", &pidFileName,
194 STRING, "File to use for process ID"},
195 {"foreground", &server_state.foreground,
196 YESNO, "Run in foreground (don't detach)"},
197 {"version", &printVersion,
198 YESNO, "Print version and exit"},
199 {"help", NULL, USAGE, "Print this text"},
200 {NULL, NULL, STRING, NULL},
201 };
202
203 static void
204 io_loop(void)
205 {
206 while (1 == 1)
207 {
208 /*
209 * Maybe we want a flags word?
210 * ie. if (REHASHED_KLINES(global_flags))
211 * SET_REHASHED_KLINES(global_flags)
212 * CLEAR_REHASHED_KLINES(global_flags)
213 *
214 * - Dianora
215 */
216 if (rehashed_klines)
217 {
218 check_conf_klines();
219 rehashed_klines = 0;
220 }
221
222 if (listing_client_list.head)
223 {
224 dlink_node *ptr = NULL, *ptr_next = NULL;
225 DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
226 {
227 struct Client *client_p = ptr->data;
228 assert(client_p->localClient->list_task);
229 safe_list_channels(client_p, client_p->localClient->list_task, 0);
230 }
231 }
232
233 /* Run pending events, then get the number of seconds to the next
234 * event
235 */
236 while (eventNextTime() <= CurrentTime)
237 eventRun();
238
239 comm_select();
240 exit_aborted_clients();
241 free_exited_clients();
242 send_queued_all();
243
244 /* Check to see whether we have to rehash the configuration .. */
245 if (dorehash)
246 {
247 rehash(1);
248 dorehash = 0;
249 }
250
251 if (doremotd)
252 {
253 read_message_file(&ConfigFileEntry.motd);
254 sendto_realops_flags(UMODE_ALL, L_ALL,
255 "Got signal SIGUSR1, reloading ircd motd file");
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 * XXX to be removed with old s_conf.c
267 */
268 static void
269 initialize_global_set_options(void)
270 {
271 memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
272
273 GlobalSetOptions.autoconn = 1;
274 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
275 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
276
277 if (ConfigFileEntry.default_floodcount)
278 GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
279 else
280 GlobalSetOptions.floodcount = 10;
281
282 /* XXX I have no idea what to try here - Dianora */
283 GlobalSetOptions.joinfloodcount = 16;
284 GlobalSetOptions.joinfloodtime = 8;
285
286 split_servers = ConfigChannel.default_split_server_count;
287 split_users = ConfigChannel.default_split_user_count;
288
289 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
290 ConfigChannel.no_join_on_split))
291 {
292 splitmode = 1;
293 splitchecking = 1;
294 }
295
296 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
297 GlobalSetOptions.idletime = ConfigFileEntry.idletime;
298 GlobalSetOptions.maxlisters = 10; /* XXX ya ya ya - db */
299 }
300
301 /* initialize_message_files()
302 *
303 * inputs - none
304 * output - none
305 * side effects - Set up all message files needed, motd etc.
306 */
307 static void
308 initialize_message_files(void)
309 {
310 init_message_file(USER_MOTD, MPATH, &ConfigFileEntry.motd);
311 init_message_file(OPER_MOTD, OPATH, &ConfigFileEntry.opermotd);
312 init_message_file(USER_LINKS, LIPATH, &ConfigFileEntry.linksfile);
313
314 read_message_file(&ConfigFileEntry.motd);
315 read_message_file(&ConfigFileEntry.opermotd);
316 read_message_file(&ConfigFileEntry.linksfile);
317
318 init_isupport();
319 }
320
321 /* initialize_server_capabs()
322 *
323 * inputs - none
324 * output - none
325 */
326 static void
327 initialize_server_capabs(void)
328 {
329 add_capability("QS", CAP_QS, 1);
330 add_capability("EOB", CAP_EOB, 1);
331 add_capability("HUB", CAP_HUB, 0);
332 add_capability("TS6", CAP_TS6, 0);
333 add_capability("ZIP", CAP_ZIP, 0);
334 add_capability("CLUSTER", CAP_CLUSTER, 1);
335 #ifdef HALFOPS
336 add_capability("HOPS", CAP_HOPS, 1);
337 #endif
338 }
339
340 /* write_pidfile()
341 *
342 * inputs - filename+path of pid file
343 * output - NONE
344 * side effects - write the pid of the ircd to filename
345 */
346 static void
347 write_pidfile(const char *filename)
348 {
349 FBFILE *fb;
350
351 if ((fb = fbopen(filename, "w")))
352 {
353 char buff[32];
354 unsigned int pid = (unsigned int)getpid();
355 size_t nbytes = ircsprintf(buff, "%u\n", pid);
356
357 if ((fbputs(buff, fb, nbytes) == -1))
358 ilog(L_ERROR, "Error writing %u to pid file %s (%s)",
359 pid, filename, strerror(errno));
360
361 fbclose(fb);
362 }
363 else
364 {
365 ilog(L_ERROR, "Error opening pid file %s", filename);
366 }
367 }
368
369 /* check_pidfile()
370 *
371 * inputs - filename+path of pid file
372 * output - none
373 * side effects - reads pid from pidfile and checks if ircd is in process
374 * list. if it is, gracefully exits
375 * -kre
376 */
377 static void
378 check_pidfile(const char *filename)
379 {
380 #ifndef _WIN32
381 FBFILE *fb;
382 char buff[32];
383 pid_t pidfromfile;
384
385 /* Don't do logging here, since we don't have log() initialised */
386 if ((fb = fbopen(filename, "r")))
387 {
388 if (fbgets(buff, 20, fb) == NULL)
389 {
390 /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
391 * strerror(errno));
392 */
393 }
394 else
395 {
396 pidfromfile = atoi(buff);
397
398 if (!kill(pidfromfile, 0))
399 {
400 /* log(L_ERROR, "Server is already running"); */
401 printf("ircd: daemon is already running\n");
402 exit(-1);
403 }
404 }
405
406 fbclose(fb);
407 }
408 else if (errno != ENOENT)
409 {
410 /* log(L_ERROR, "Error opening pid file %s", filename); */
411 }
412 #endif
413 }
414
415 /* init_ssl()
416 *
417 * inputs - nothing
418 * output - nothing
419 * side effects - setups SSL context.
420 */
421 static void
422 init_ssl(void)
423 {
424 #ifdef HAVE_LIBCRYPTO
425 SSL_library_init();
426 SSL_load_error_strings();
427
428 ServerInfo.ctx = SSL_CTX_new(SSLv23_server_method());
429
430 if (!ServerInfo.ctx)
431 {
432 const char *s;
433
434 fprintf(stderr, "ERROR: Could not initialize the SSL context -- %s\n",
435 s = ERR_lib_error_string(ERR_get_error()));
436 ilog(L_CRIT, "ERROR: Could not initialize the SSL context -- %s\n", s);
437 }
438
439 SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_NO_SSLv2);
440 SSL_CTX_set_options(ServerInfo.ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
441 SSL_CTX_set_verify(ServerInfo.ctx, SSL_VERIFY_NONE, NULL);
442
443 bio_spare_fd = save_spare_fd("SSL private key validation");
444 #endif /* HAVE_LIBCRYPTO */
445 }
446
447 /* init_callbacks()
448 *
449 * inputs - nothing
450 * output - nothing
451 * side effects - setups standard hook points
452 */
453 static void
454 init_callbacks(void)
455 {
456 entering_umode_cb = register_callback("entering_umode", NULL);
457 iorecv_cb = register_callback("iorecv", iorecv_default);
458 iosend_cb = register_callback("iosend", iosend_default);
459 iorecvctrl_cb = register_callback("iorecvctrl", NULL);
460 iosendctrl_cb = register_callback("iosendctrl", NULL);
461 uid_get_cb = register_callback("uid_get", uid_get);
462 umode_cb = register_callback("changing_umode", change_simple_umode);
463 }
464
465 static void *
466 changing_fdlimit(va_list args)
467 {
468 int old_fdlimit = hard_fdlimit;
469 int fdmax = va_arg(args, int);
470
471 /* allow MAXCLIENTS_MIN clients even at the cost of MAX_BUFFER and
472 * some not really LEAKED_FDS */
473 fdmax = IRCD_MAX(fdmax, LEAKED_FDS + MAX_BUFFER + MAXCLIENTS_MIN);
474
475 pass_callback(fdlimit_hook, fdmax);
476
477 if (ServerInfo.max_clients > MAXCLIENTS_MAX)
478 {
479 if (old_fdlimit != 0)
480 sendto_realops_flags(UMODE_ALL, L_ALL,
481 "HARD_FDLIMIT changed to %d, adjusting MAXCLIENTS to %d",
482 hard_fdlimit, MAXCLIENTS_MAX);
483
484 ServerInfo.max_clients = MAXCLIENTS_MAX;
485 }
486
487 return NULL;
488 }
489
490 EXTERN int
491 main(int argc, char *argv[])
492 {
493 /*
494 * Check to see if the user is running us as root, which is a nono
495 */
496 #ifndef _WIN32
497 if (geteuid() == 0)
498 {
499 fprintf(stderr, "Don't run ircd as root!!!\n");
500 return 1;
501 }
502
503 /* Setup corefile size immediately after boot -kre */
504 setup_corefile();
505
506 /* set initialVMTop before we allocate any memory */
507 initialVMTop = get_vm_top();
508 #endif
509
510 memset(&ServerInfo, 0, sizeof(ServerInfo));
511 memset(&ServerStats, 0, sizeof(ServerStats));
512
513 ConfigFileEntry.dpath = DPATH;
514 ConfigFileEntry.configfile = CPATH; /* Server configuration file */
515 ConfigFileEntry.klinefile = KPATH; /* Server kline file */
516 ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
517 ConfigFileEntry.rxlinefile = RXPATH; /* Server regex xline file */
518 ConfigFileEntry.rklinefile = RKPATH; /* Server regex kline file */
519 ConfigFileEntry.dlinefile = DLPATH; /* dline file */
520 ConfigFileEntry.glinefile = GPATH; /* gline log file */
521 ConfigFileEntry.cresvfile = CRESVPATH; /* channel resv file */
522 ConfigFileEntry.nresvfile = NRESVPATH; /* nick resv file */
523 myargv = argv;
524 umask(077); /* better safe than sorry --SRB */
525
526 parseargs(&argc, &argv, myopts);
527
528 if (printVersion)
529 {
530 printf("ircd: version %s\n", ircd_version);
531 exit(EXIT_SUCCESS);
532 }
533
534 if (chdir(ConfigFileEntry.dpath))
535 {
536 perror("chdir");
537 exit(EXIT_FAILURE);
538 }
539
540 init_ssl();
541
542 #ifndef _WIN32
543 if (!server_state.foreground)
544 make_daemon();
545 else
546 print_startup(getpid());
547 #endif
548
549 libio_init(!server_state.foreground);
550 outofmemory = ircd_outofmemory;
551 fdlimit_hook = install_hook(fdlimit_cb, changing_fdlimit);
552
553 check_pidfile(pidFileName);
554 setup_signals();
555 get_ircd_platform(ircd_platform);
556 init_log(logFileName);
557 ServerInfo.can_use_v6 = check_can_use_v6();
558
559 /* make_dlink_node() cannot be called until after libio_init() */
560 memset(&me, 0, sizeof(me));
561 memset(&meLocalUser, 0, sizeof(meLocalUser));
562
563 me.localClient = &meLocalUser;
564 me.from = me.servptr = &me;
565 me.lasttime = me.since = me.firsttime = CurrentTime;
566
567 SetMe(&me);
568 make_server(&me);
569 dlinkAdd(&me, &me.node, &global_client_list);
570 dlinkAdd(&me, make_dlink_node(), &global_serv_list);
571
572 init_callbacks();
573 initialize_message_files();
574 init_hash();
575 init_ip_hash_table(); /* client host ip hash table */
576 init_host_hash(); /* Host-hashtable. */
577 clear_tree_parse();
578 init_client();
579 init_class();
580 init_whowas();
581 init_auth(); /* Initialise the auth code */
582 init_channels();
583 init_channel_modes();
584 initialize_server_capabs(); /* Set up default_server_capabs */
585
586 read_conf_files(1); /* cold start init conf files */
587 check_class();
588 init_watch();
589
590 if (ServerInfo.name == NULL)
591 {
592 ilog(L_CRIT, "ERROR: No server name specified in serverinfo block.");
593 exit(EXIT_FAILURE);
594 }
595
596 strlcpy(me.name, ServerInfo.name, sizeof(me.name));
597
598 /* serverinfo{} description must exist. If not, error out.*/
599 if (ServerInfo.description == NULL)
600 {
601 ilog(L_CRIT,
602 "ERROR: No server description specified in serverinfo block.");
603 exit(EXIT_FAILURE);
604 }
605
606 strlcpy(me.info, ServerInfo.description, sizeof(me.info));
607
608 hash_add_client(&me);
609
610 init_uid(); /* XXX move this one up after inculcating new conf system */
611 initialize_global_set_options(); /* and this one is going to be deleted */
612
613 #ifndef STATIC_MODULES
614 if (chdir(MODPATH))
615 {
616 ilog (L_CRIT, "Could not load core modules. Terminating!");
617 exit(EXIT_FAILURE);
618 }
619
620 boot_modules(1);
621
622 /* Go back to DPATH after checking to see if we can chdir to MODPATH */
623 chdir(ConfigFileEntry.dpath);
624 #else
625 load_all_modules(1);
626 #endif
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(L_NOTICE, "Server Ready");
636
637 eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
638
639 /* We want try_connections to be called as soon as possible now! -- adrian */
640 /* No, 'cause after a restart it would cause all sorts of nick collides */
641 eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
642
643 eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
644
645 /* Setup the timeout check. I'll shift it later :) -- adrian */
646 eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
647
648 /* XXX to be removed with old s_conf.c [superseded] */
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) /* XXX */
655 eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
656
657 io_loop();
658 return 0;
659 }
660
661 #else
662
663 #include <windows.h>
664
665 extern __declspec(dllimport) main(int, char **);
666
667 /*
668 * Initial entry point for Win32 GUI applications, called by the C runtime.
669 *
670 * It should be only a wrapper for main(), since when compiled as a console
671 * application, main() is called instead.
672 */
673 int WINAPI
674 WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
675 LPSTR lpCmdLine, int nCmdShow)
676 {
677 /* Do we really need these pidfile, logfile etc arguments?
678 * And we are not on a console, so -help or -foreground is meaningless. */
679
680 char *argv[2] = {"ircd", NULL};
681
682 return main(1, argv);
683 }
684
685 #endif

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