src/ircd.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  ircd.c: Starts up and runs the ircd.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  *
  24  *  $Id: ircd.c 3380 2007-04-03 22:25:11Z jilles $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "setup.h"
  29 #include "config.h"
  30
  31 #include "ircd.h"
  32 #include "channel.h"
  33 #include "class.h"
  34 #include "client.h"
  35 #include "common.h"
  36 #include "hash.h"
  37 #include "irc_string.h"
  38 #include "ircd_signal.h"
  39 #include "sprintf_irc.h"
  40 #include "s_gline.h"
  41 #include "msg.h"                /* msgtab */
  42 #include "hostmask.h"
  43 #include "numeric.h"
  44 #include "parse.h"
  45 #include "res.h"
  46 #include "restart.h"
  47 #include "s_auth.h"
  48 #include "s_conf.h"
  49 #include "s_log.h"
  50 #include "s_serv.h"             /* try_connections */
  51 #include "s_user.h"
  52 #include "s_stats.h"
  53 #include "scache.h"
  54 #include "send.h"
  55 #include "supported.h"
  56 #include "whowas.h"
  57 #include "modules.h"
  58 #include "hook.h"
  59 #include "ircd_getopt.h"
  60 #include "newconf.h"
  61 #include "reject.h"
  62 #include "s_conf.h"
  63 #include "s_newconf.h"
  64 #include "cache.h"
  65 #include "monitor.h"
  66 #include "patchlevel.h"
  67 #include "serno.h"
  68
  69 #include "ratbox_lib.h"
  70
  71 /*
  72  * Try and find the correct name to use with getrlimit() for setting the max.
  73  * number of files allowed to be open by this process.
  74  */
  75 int _charybdis_data_version = CHARYBDIS_DV;
  76
  77 extern int ServerRunning;
  78 extern struct LocalUser meLocalUser;
  79 extern char **myargv;
  80
  81 extern int maxconnections; /* XXX */
  82
  83 /*
  84  * print_startup - print startup information
  85  */
  86 static void
  87 print_startup(int pid)
  88 {
  89         inotice("now running in %s mode from %s as pid %d ...",
  90                !server_state_foreground ? "background" : "foreground",
  91                 ConfigFileEntry.dpath, pid);
  92
  93         /* let the parent process know the initialization was successful
  94          * -- jilles */
  95         if (!server_state_foreground)
  96                 write(0, ".", 1);
  97         fclose(stdin);
  98         fclose(stdout);
  99         fclose(stderr);
 100         open("/dev/null", O_RDWR);
 101         dup2(0, 1);
 102         dup2(0, 2);
 103 }
 104
 105 static void
 106 ircd_log_cb(const char *str)
 107 {
 108         ilog(L_MAIN, "%s", str);
 109 }
 110
 111 static void
 112 ircd_restart_cb(const char *str)
 113 {
 114         ilog(L_MAIN, "%s", str);
 115 }
 116
 117 /*
 118  * Why EXIT_FAILURE here?
 119  * Because if ircd_die_cb() is called it's because of a fatal
 120  * error inside libcharybdis, and we don't know how to handle the
 121  * exception, so it is logical to return a FAILURE exit code here.
 122  *    --nenolod
 123  */
 124 static void
 125 ircd_die_cb(const char *str)
 126 {
 127         /* Try to get the message out to currently logged in operators. */
 128         sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Server panic! %s", str);
 129         inotice("server panic: %s", str);
 130
 131         unlink(pidFileName);
 132         exit(EXIT_FAILURE);
 133 }
 134
 135 /*
 136  * init_sys
 137  *
 138  * inputs       - boot_daemon flag
 139  * output       - none
 140  * side effects - if boot_daemon flag is not set, don't daemonize
 141  */
 142 static void
 143 init_sys(void)
 144 {
 145 #if defined(RLIMIT_NOFILE) && defined(HAVE_SYS_RESOURCE_H)
 146         struct rlimit limit;
 147
 148         if(!getrlimit(RLIMIT_NOFILE, &limit))
 149         {
 150                 limit.rlim_cur = limit.rlim_max;        /* make soft limit the max */
 151                 if(setrlimit(RLIMIT_NOFILE, &limit) == -1)
 152                 {
 153                         fprintf(stderr, "error setting max fd's to %ld\n", (long) limit.rlim_cur);
 154                         exit(EXIT_FAILURE);
 155                 }
 156         }
 157 #endif /* RLIMIT_NOFILE */
 158 }
 159
 160 static int
 161 make_daemon(void)
 162 {
 163         int pid;
 164         int pip[2];
 165         char c;
 166
 167         if (pipe(pip) < 0)
 168         {
 169                 perror("pipe");
 170                 exit(EXIT_FAILURE);
 171         }
 172         dup2(pip[1], 0);
 173         close(pip[1]);
 174         if((pid = fork()) < 0)
 175         {
 176                 perror("fork");
 177                 exit(EXIT_FAILURE);
 178         }
 179         else if(pid > 0)
 180         {
 181                 close(0);
 182                 /* Wait for initialization to finish, successfully or
 183                  * unsuccessfully. Until this point the child may still
 184                  * write to stdout/stderr.
 185                  * -- jilles */
 186                 if (read(pip[0], &c, 1) > 0)
 187                         exit(EXIT_SUCCESS);
 188                 else
 189                         exit(EXIT_FAILURE);
 190         }
 191
 192         close(pip[0]);
 193         setsid();
 194 /*      fclose(stdin);
 195         fclose(stdout);
 196         fclose(stderr); */
 197
 198         return 0;
 199 }
 200
 201 static int printVersion = 0;
 202
 203 struct lgetopt myopts[] = {
 204         {"dlinefile", &ConfigFileEntry.dlinefile,
 205          STRING, "File to use for dlines.conf"},
 206         {"configfile", &ConfigFileEntry.configfile,
 207          STRING, "File to use for ircd.conf"},
 208         {"klinefile", &ConfigFileEntry.klinefile,
 209          STRING, "File to use for kline.conf"},
 210         {"xlinefile", &ConfigFileEntry.xlinefile,
 211          STRING, "File to use for xline.conf"},
 212         {"resvfile", &ConfigFileEntry.resvfile,
 213          STRING, "File to use for resv.conf"},
 214         {"logfile", &logFileName,
 215          STRING, "File to use for ircd.log"},
 216         {"pidfile", &pidFileName,
 217          STRING, "File to use for process ID"},
 218         {"foreground", &server_state_foreground,
 219          YESNO, "Run in foreground (don't detach)"},
 220         {"version", &printVersion,
 221          YESNO, "Print version and exit"},
 222         {"conftest", &testing_conf,
 223          YESNO, "Test the configuration files and exit"},
 224         {"help", NULL, USAGE, "Print this text"},
 225         {NULL, NULL, STRING, NULL},
 226 };
 227
 228 void
 229 set_time(void)
 230 {
 231         struct timeval newtime;
 232         newtime.tv_sec = 0;
 233         newtime.tv_usec = 0;
 234 #ifdef HAVE_GETTIMEOFDAY
 235         if(gettimeofday(&newtime, NULL) == -1)
 236         {
 237                 ilog(L_MAIN, "Clock Failure (%d)", errno);
 238                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 239                                      "Clock Failure (%d), TS can be corrupted", errno);
 240
 241                 restart("Clock Failure");
 242         }
 243 #else
 244         newtime.tv_sec = time(NULL);
 245
 246 #endif
 247         if(newtime.tv_sec < rb_current_time())
 248                 rb_set_back_events(rb_current_time() - newtime.tv_sec);
 249
 250         SystemTime.tv_sec = newtime.tv_sec;
 251         SystemTime.tv_usec = newtime.tv_usec;
 252 }
 253
 254 static void
 255 check_rehash(void *unused)
 256 {
 257         /*
 258          * Check to see whether we have to rehash the configuration ..
 259          */
 260         if(dorehash)
 261         {
 262                 rehash(1);
 263                 dorehash = 0;
 264         }
 265
 266         if(dorehashbans)
 267         {
 268                 rehash_bans(1);
 269                 dorehashbans = 0;
 270         }
 271
 272         if(doremotd)
 273         {
 274                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 275                                      "Got signal SIGUSR1, reloading ircd motd file");
 276                 free_cachefile(user_motd);
 277                 user_motd = cache_file(MPATH, "ircd.motd", 0);
 278                 doremotd = 0;
 279         }
 280 }
 281
 282 void
 283 charybdis_io_loop(void)
 284 {
 285         time_t delay;
 286
 287         while (ServerRunning)
 288         {
 289                 /* Run pending events, then get the number of seconds to the next
 290                  * event
 291                  */
 292
 293                 delay = rb_event_next();
 294                 if(delay <= rb_current_time())
 295                         rb_event_run();
 296
 297
 298                 rb_select(250);
 299         }
 300 }
 301
 302 /*
 303  * initalialize_global_set_options
 304  *
 305  * inputs       - none
 306  * output       - none
 307  * side effects - This sets all global set options needed
 308  */
 309 static void
 310 initialize_global_set_options(void)
 311 {
 312         memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
 313         /* memset( &ConfigFileEntry, 0, sizeof(ConfigFileEntry)); */
 314
 315         GlobalSetOptions.maxclients = ServerInfo.max_clients;
 316         GlobalSetOptions.autoconn = 1;
 317
 318         GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
 319         GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
 320
 321         if(ConfigFileEntry.default_floodcount)
 322                 GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
 323         else
 324                 GlobalSetOptions.floodcount = 10;
 325
 326         split_servers = ConfigChannel.default_split_server_count;
 327         split_users = ConfigChannel.default_split_user_count;
 328
 329         if(split_users && split_servers
 330            && (ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split))
 331         {
 332                 splitmode = 1;
 333                 splitchecking = 1;
 334         }
 335
 336         GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
 337
 338         strlcpy(GlobalSetOptions.operstring,
 339                 ConfigFileEntry.default_operstring,
 340                 sizeof(GlobalSetOptions.operstring));
 341         strlcpy(GlobalSetOptions.adminstring,
 342                 ConfigFileEntry.default_adminstring,
 343                 sizeof(GlobalSetOptions.adminstring));
 344
 345         /* memset( &ConfigChannel, 0, sizeof(ConfigChannel)); */
 346
 347         /* End of global set options */
 348
 349 }
 350
 351 /*
 352  * initialize_server_capabs
 353  *
 354  * inputs       - none
 355  * output       - none
 356  */
 357 static void
 358 initialize_server_capabs(void)
 359 {
 360         default_server_capabs &= ~CAP_ZIP;
 361 }
 362
 363
 364 /*
 365  * write_pidfile
 366  *
 367  * inputs       - filename+path of pid file
 368  * output       - none
 369  * side effects - write the pid of the ircd to filename
 370  */
 371 static void
 372 write_pidfile(const char *filename)
 373 {
 374         FILE *fb;
 375         char buff[32];
 376         if((fb = fopen(filename, "w")))
 377         {
 378                 unsigned int pid = (unsigned int) getpid();
 379
 380                 rb_snprintf(buff, sizeof(buff), "%u\n", pid);
 381                 if((fputs(buff, fb) == -1))
 382                 {
 383                         ilog(L_MAIN, "Error writing %u to pid file %s (%s)",
 384                              pid, filename, strerror(errno));
 385                 }
 386                 fclose(fb);
 387                 return;
 388         }
 389         else
 390         {
 391                 ilog(L_MAIN, "Error opening pid file %s", filename);
 392         }
 393 }
 394
 395 /*
 396  * check_pidfile
 397  *
 398  * inputs       - filename+path of pid file
 399  * output       - none
 400  * side effects - reads pid from pidfile and checks if ircd is in process
 401  *                list. if it is, gracefully exits
 402  * -kre
 403  */
 404 static void
 405 check_pidfile(const char *filename)
 406 {
 407         FILE *fb;
 408         char buff[32];
 409         pid_t pidfromfile;
 410
 411         /* Don't do logging here, since we don't have log() initialised */
 412         if((fb = fopen(filename, "r")))
 413         {
 414                 if(fgets(buff, 20, fb) != NULL)
 415                 {
 416                         pidfromfile = atoi(buff);
 417                         if(!kill(pidfromfile, 0))
 418                         {
 419                                 printf("ircd: daemon is already running\n");
 420                                 exit(-1);
 421                         }
 422                 }
 423                 fclose(fb);
 424         }
 425 }
 426
 427 /*
 428  * setup_corefile
 429  *
 430  * inputs       - nothing
 431  * output       - nothing
 432  * side effects - setups corefile to system limits.
 433  * -kre
 434  */
 435 static void
 436 setup_corefile(void)
 437 {
 438 #ifdef HAVE_SYS_RESOURCE_H
 439         struct rlimit rlim;     /* resource limits */
 440
 441         /* Set corefilesize to maximum */
 442         if(!getrlimit(RLIMIT_CORE, &rlim))
 443         {
 444                 rlim.rlim_cur = rlim.rlim_max;
 445                 setrlimit(RLIMIT_CORE, &rlim);
 446         }
 447 #endif
 448 }
 449
 450 struct ev_entry *check_splitmode_ev = NULL;
 451
 452 /*
 453  * main
 454  *
 455  * Initializes the IRCd.
 456  *
 457  * Inputs       - number of commandline args, args themselves
 458  * Outputs      - none
 459  * Side Effects - this is where the ircd gets going right now
 460  */
 461 int
 462 main(int argc, char *argv[])
 463 {
 464         int fd;
 465
 466         /* Check to see if the user is running us as root, which is a nono */
 467         if(geteuid() == 0)
 468         {
 469                 fprintf(stderr, "Don't run ircd as root!!!\n");
 470                 return -1;
 471         }
 472
 473         /*
 474          * save server boot time right away, so getrusage works correctly
 475          */
 476         set_time();
 477         /*
 478          * Setup corefile size immediately after boot -kre
 479          */
 480         setup_corefile();
 481
 482         ServerRunning = 0;
 483         /* It ain't random, but it ought to be a little harder to guess */
 484         srand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
 485         memset(&me, 0, sizeof(me));
 486         memset(&meLocalUser, 0, sizeof(meLocalUser));
 487         me.localClient = &meLocalUser;
 488
 489         /* Make sure all lists are zeroed */
 490         memset(&unknown_list, 0, sizeof(unknown_list));
 491         memset(&lclient_list, 0, sizeof(lclient_list));
 492         memset(&serv_list, 0, sizeof(serv_list));
 493         memset(&global_serv_list, 0, sizeof(global_serv_list));
 494         memset(&local_oper_list, 0, sizeof(local_oper_list));
 495         memset(&oper_list, 0, sizeof(oper_list));
 496
 497         rb_dlinkAddTail(&me, &me.node, &global_client_list);
 498
 499         memset((void *) &Count, 0, sizeof(Count));
 500         memset((void *) &ServerInfo, 0, sizeof(ServerInfo));
 501         memset((void *) &AdminInfo, 0, sizeof(AdminInfo));
 502
 503         /* Initialise the channel capability usage counts... */
 504         init_chcap_usage_counts();
 505
 506         ConfigFileEntry.dpath = DPATH;
 507         ConfigFileEntry.configfile = CPATH;     /* Server configuration file */
 508         ConfigFileEntry.klinefile = KPATH;      /* Server kline file */
 509         ConfigFileEntry.dlinefile = DLPATH;     /* dline file */
 510         ConfigFileEntry.xlinefile = XPATH;
 511         ConfigFileEntry.resvfile = RESVPATH;
 512         ConfigFileEntry.connect_timeout = 30;   /* Default to 30 */
 513         myargv = argv;
 514         umask(077);             /* better safe than sorry --SRB */
 515
 516         parseargs(&argc, &argv, myopts);
 517
 518         if(printVersion)
 519         {
 520                 printf("ircd: version %s\n", ircd_version);
 521                 exit(EXIT_SUCCESS);
 522         }
 523
 524         if(chdir(ConfigFileEntry.dpath))
 525         {
 526                 fprintf(stderr, "Unable to chdir to %s: %s\n", ConfigFileEntry.dpath, strerror(errno));
 527                 exit(EXIT_FAILURE);
 528         }
 529
 530         setup_signals();
 531
 532 #ifdef __CYGWIN__
 533         server_state_foreground = 1;
 534 #endif
 535
 536         if (testing_conf)
 537                 server_state_foreground = 1;
 538
 539         /* Make sure fd 0, 1 and 2 are in use -- jilles */
 540         do
 541         {
 542                 fd = open("/dev/null", O_RDWR);
 543         } while (fd < 2 && fd != -1);
 544         if (fd > 2)
 545                 close(fd);
 546         else if (fd == -1)
 547                 exit(1);
 548
 549         /* Check if there is pidfile and daemon already running */
 550         if(!testing_conf)
 551         {
 552                 check_pidfile(pidFileName);
 553
 554                 if(!server_state_foreground)
 555                         make_daemon();
 556                 inotice("starting %s ...", ircd_version);
 557         }
 558
 559         /* Init the event subsystem */
 560         init_sys();
 561         libcharybdis_init(ircd_log_cb, restart, ircd_die_cb);
 562         rb_lib_init(ircd_log_cb, restart, ircd_die_cb, !server_state_foreground, maxconnections, DNODE_HEAP_SIZE, FD_HEAP_SIZE);
 563
 564         init_main_logfile();
 565         newconf_init();
 566         init_s_conf();
 567         init_s_newconf();
 568         init_hash();
 569         clear_scache_hash_table();      /* server cache name table */
 570         init_host_hash();
 571         clear_hash_parse();
 572         init_client();
 573         initUser();
 574         init_hook();
 575         init_channels();
 576         initclass();
 577         initwhowas();
 578         init_stats();
 579         init_reject();
 580         init_cache();
 581         init_monitor();
 582         init_isupport();
 583         load_all_modules(1);
 584 #ifndef STATIC_MODULES
 585         load_core_modules(1);
 586 #endif
 587         init_auth();            /* Initialise the auth code */
 588         init_resolver();        /* Needs to be setup before the io loop */
 589
 590         if (testing_conf)
 591                 fprintf(stderr, "\nBeginning config test\n");
 592         read_conf_files(YES);   /* cold start init conf files */
 593         rehash_bans(0);
 594 #ifndef STATIC_MODULES
 595
 596         mod_add_path(MODULE_DIR);
 597         mod_add_path(MODULE_DIR "/autoload");
 598 #endif
 599
 600         initialize_server_capabs();     /* Set up default_server_capabs */
 601         initialize_global_set_options();
 602
 603         if(ServerInfo.name == NULL)
 604         {
 605                 ierror("no server name specified in serverinfo block.");
 606                 return -1;
 607         }
 608         strlcpy(me.name, ServerInfo.name, sizeof(me.name));
 609
 610         if(ServerInfo.sid[0] == '\0')
 611         {
 612                 ierror("no server sid specified in serverinfo block.");
 613                 return -2;
 614         }
 615         strcpy(me.id, ServerInfo.sid);
 616         init_uid();
 617
 618         /* serverinfo{} description must exist.  If not, error out. */
 619         if(ServerInfo.description == NULL)
 620         {
 621                 ierror("no server description specified in serverinfo block.");
 622                 return -3;
 623         }
 624         strlcpy(me.info, ServerInfo.description, sizeof(me.info));
 625
 626         if (testing_conf)
 627         {
 628                 fprintf(stderr, "\nConfig testing complete.\n");
 629                 fflush(stderr);
 630                 return 0;       /* Why? We want the launcher to exit out. */
 631         }
 632
 633         me.from = &me;
 634         me.servptr = &me;
 635         SetMe(&me);
 636         make_server(&me);
 637         startup_time = rb_current_time();
 638         add_to_client_hash(me.name, &me);
 639         add_to_id_hash(me.id, &me);
 640         me.serv->nameinfo = scache_connect(me.name, me.info, 0);
 641
 642         rb_dlinkAddAlloc(&me, &global_serv_list);
 643
 644         construct_umodebuf();
 645
 646         check_class();
 647         write_pidfile(pidFileName);
 648         load_help();
 649         open_logfiles();
 650
 651         ilog(L_MAIN, "Server Ready");
 652
 653         eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
 654
 655         /* We want try_connections to be called as soon as possible now! -- adrian */
 656         /* No, 'cause after a restart it would cause all sorts of nick collides */
 657         /* um.  by waiting even longer, that just means we have even *more*
 658          * nick collisions.  what a stupid idea. set an event for the IO loop --fl
 659          */
 660         eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
 661         eventAddOnce("try_connections_startup", try_connections, NULL, 0);
 662
 663         eventAddIsh("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
 664
 665         /* Setup the timeout check. I'll shift it later :)  -- adrian */
 666         eventAddIsh("rb_checktimeouts", rb_checktimeouts, NULL, 1);
 667
 668         eventAdd("check_rehash", check_rehash, NULL, 1);
 669
 670         if(splitmode)
 671                 check_splitmode_ev = rb_event_add("check_splitmode", check_splitmode, NULL, 2);
 672
 673         ServerRunning = 1;
 674
 675         print_startup(getpid());
 676
 677         charybdis_io_loop();
 678
 679         return 0;
 680 }