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 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         restart(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
 233         newtime.tv_sec = 0;
 234         newtime.tv_usec = 0;
 235 #ifdef HAVE_GETTIMEOFDAY
 236         if(gettimeofday(&newtime, NULL) == -1)
 237         {
 238                 ilog(L_MAIN, "Clock Failure (%d)", errno);
 239                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 240                                      "Clock Failure (%d), TS can be corrupted", errno);
 241
 242                 restart("Clock Failure");
 243         }
 244 #else
 245         newtime.tv_sec = time(NULL);
 246
 247 #endif
 248
 249         SystemTime.tv_sec = newtime.tv_sec;
 250         SystemTime.tv_usec = newtime.tv_usec;
 251
 252         rb_set_time();
 253 }
 254
 255 static void
 256 check_rehash(void *unused)
 257 {
 258         /*
 259          * Check to see whether we have to rehash the configuration ..
 260          */
 261         if(dorehash)
 262         {
 263                 rehash(1);
 264                 dorehash = 0;
 265         }
 266
 267         if(dorehashbans)
 268         {
 269                 rehash_bans(1);
 270                 dorehashbans = 0;
 271         }
 272
 273         if(doremotd)
 274         {
 275                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 276                                      "Got signal SIGUSR1, reloading ircd motd file");
 277                 free_cachefile(user_motd);
 278                 user_motd = cache_file(MPATH, "ircd.motd", 0);
 279                 doremotd = 0;
 280         }
 281 }
 282
 283 /*
 284  * initalialize_global_set_options
 285  *
 286  * inputs       - none
 287  * output       - none
 288  * side effects - This sets all global set options needed
 289  */
 290 static void
 291 initialize_global_set_options(void)
 292 {
 293         memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
 294         /* memset( &ConfigFileEntry, 0, sizeof(ConfigFileEntry)); */
 295
 296         GlobalSetOptions.maxclients = ServerInfo.max_clients;
 297         GlobalSetOptions.autoconn = 1;
 298
 299         GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
 300         GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
 301
 302         if(ConfigFileEntry.default_floodcount)
 303                 GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
 304         else
 305                 GlobalSetOptions.floodcount = 10;
 306
 307         split_servers = ConfigChannel.default_split_server_count;
 308         split_users = ConfigChannel.default_split_user_count;
 309
 310         if(split_users && split_servers
 311            && (ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split))
 312         {
 313                 splitmode = 1;
 314                 splitchecking = 1;
 315         }
 316
 317         GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
 318
 319         strlcpy(GlobalSetOptions.operstring,
 320                 ConfigFileEntry.default_operstring,
 321                 sizeof(GlobalSetOptions.operstring));
 322         strlcpy(GlobalSetOptions.adminstring,
 323                 ConfigFileEntry.default_adminstring,
 324                 sizeof(GlobalSetOptions.adminstring));
 325
 326         /* memset( &ConfigChannel, 0, sizeof(ConfigChannel)); */
 327
 328         /* End of global set options */
 329
 330 }
 331
 332 /*
 333  * initialize_server_capabs
 334  *
 335  * inputs       - none
 336  * output       - none
 337  */
 338 static void
 339 initialize_server_capabs(void)
 340 {
 341         default_server_capabs &= ~CAP_ZIP;
 342 }
 343
 344
 345 /*
 346  * write_pidfile
 347  *
 348  * inputs       - filename+path of pid file
 349  * output       - none
 350  * side effects - write the pid of the ircd to filename
 351  */
 352 static void
 353 write_pidfile(const char *filename)
 354 {
 355         FILE *fb;
 356         char buff[32];
 357         if((fb = fopen(filename, "w")))
 358         {
 359                 unsigned int pid = (unsigned int) getpid();
 360
 361                 rb_snprintf(buff, sizeof(buff), "%u\n", pid);
 362                 if((fputs(buff, fb) == -1))
 363                 {
 364                         ilog(L_MAIN, "Error writing %u to pid file %s (%s)",
 365                              pid, filename, strerror(errno));
 366                 }
 367                 fclose(fb);
 368                 return;
 369         }
 370         else
 371         {
 372                 ilog(L_MAIN, "Error opening pid file %s", filename);
 373         }
 374 }
 375
 376 /*
 377  * check_pidfile
 378  *
 379  * inputs       - filename+path of pid file
 380  * output       - none
 381  * side effects - reads pid from pidfile and checks if ircd is in process
 382  *                list. if it is, gracefully exits
 383  * -kre
 384  */
 385 static void
 386 check_pidfile(const char *filename)
 387 {
 388         FILE *fb;
 389         char buff[32];
 390         pid_t pidfromfile;
 391
 392         /* Don't do logging here, since we don't have log() initialised */
 393         if((fb = fopen(filename, "r")))
 394         {
 395                 if(fgets(buff, 20, fb) != NULL)
 396                 {
 397                         pidfromfile = atoi(buff);
 398                         if(!kill(pidfromfile, 0))
 399                         {
 400                                 printf("ircd: daemon is already running\n");
 401                                 exit(-1);
 402                         }
 403                 }
 404                 fclose(fb);
 405         }
 406 }
 407
 408 /*
 409  * setup_corefile
 410  *
 411  * inputs       - nothing
 412  * output       - nothing
 413  * side effects - setups corefile to system limits.
 414  * -kre
 415  */
 416 static void
 417 setup_corefile(void)
 418 {
 419 #ifdef HAVE_SYS_RESOURCE_H
 420         struct rlimit rlim;     /* resource limits */
 421
 422         /* Set corefilesize to maximum */
 423         if(!getrlimit(RLIMIT_CORE, &rlim))
 424         {
 425                 rlim.rlim_cur = rlim.rlim_max;
 426                 setrlimit(RLIMIT_CORE, &rlim);
 427         }
 428 #endif
 429 }
 430
 431 struct ev_entry *check_splitmode_ev = NULL;
 432
 433 /*
 434  * main
 435  *
 436  * Initializes the IRCd.
 437  *
 438  * Inputs       - number of commandline args, args themselves
 439  * Outputs      - none
 440  * Side Effects - this is where the ircd gets going right now
 441  */
 442 int
 443 main(int argc, char *argv[])
 444 {
 445         int fd;
 446
 447         /* Check to see if the user is running us as root, which is a nono */
 448         if(geteuid() == 0)
 449         {
 450                 fprintf(stderr, "Don't run ircd as root!!!\n");
 451                 return -1;
 452         }
 453
 454         /*
 455          * save server boot time right away, so getrusage works correctly
 456          */
 457         set_time();
 458         /*
 459          * Setup corefile size immediately after boot -kre
 460          */
 461         setup_corefile();
 462
 463         ServerRunning = 0;
 464         /* It ain't random, but it ought to be a little harder to guess */
 465         srand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
 466         memset(&me, 0, sizeof(me));
 467         memset(&meLocalUser, 0, sizeof(meLocalUser));
 468         me.localClient = &meLocalUser;
 469
 470         /* Make sure all lists are zeroed */
 471         memset(&unknown_list, 0, sizeof(unknown_list));
 472         memset(&lclient_list, 0, sizeof(lclient_list));
 473         memset(&serv_list, 0, sizeof(serv_list));
 474         memset(&global_serv_list, 0, sizeof(global_serv_list));
 475         memset(&local_oper_list, 0, sizeof(local_oper_list));
 476         memset(&oper_list, 0, sizeof(oper_list));
 477
 478         rb_dlinkAddTail(&me, &me.node, &global_client_list);
 479
 480         memset((void *) &Count, 0, sizeof(Count));
 481         memset((void *) &ServerInfo, 0, sizeof(ServerInfo));
 482         memset((void *) &AdminInfo, 0, sizeof(AdminInfo));
 483
 484         /* Initialise the channel capability usage counts... */
 485         init_chcap_usage_counts();
 486
 487         ConfigFileEntry.dpath = DPATH;
 488         ConfigFileEntry.configfile = CPATH;     /* Server configuration file */
 489         ConfigFileEntry.klinefile = KPATH;      /* Server kline file */
 490         ConfigFileEntry.dlinefile = DLPATH;     /* dline file */
 491         ConfigFileEntry.xlinefile = XPATH;
 492         ConfigFileEntry.resvfile = RESVPATH;
 493         ConfigFileEntry.connect_timeout = 30;   /* Default to 30 */
 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\n", ircd_version);
 502                 exit(EXIT_SUCCESS);
 503         }
 504
 505         if(chdir(ConfigFileEntry.dpath))
 506         {
 507                 fprintf(stderr, "Unable to chdir to %s: %s\n", ConfigFileEntry.dpath, strerror(errno));
 508                 exit(EXIT_FAILURE);
 509         }
 510
 511         setup_signals();
 512
 513 #ifdef __CYGWIN__
 514         server_state_foreground = 1;
 515 #endif
 516
 517         if (testing_conf)
 518                 server_state_foreground = 1;
 519
 520         /* Make sure fd 0, 1 and 2 are in use -- jilles */
 521         do
 522         {
 523                 fd = open("/dev/null", O_RDWR);
 524         } while (fd < 2 && fd != -1);
 525         if (fd > 2)
 526                 close(fd);
 527         else if (fd == -1)
 528                 exit(1);
 529
 530         /* Check if there is pidfile and daemon already running */
 531         if(!testing_conf)
 532         {
 533                 check_pidfile(pidFileName);
 534
 535                 if(!server_state_foreground)
 536                         make_daemon();
 537                 inotice("starting %s ...", ircd_version);
 538         }
 539
 540         /* Init the event subsystem */
 541         init_sys();
 542         rb_lib_init(ircd_log_cb, ircd_restart_cb, ircd_die_cb, !server_state_foreground, maxconnections, DNODE_HEAP_SIZE, FD_HEAP_SIZE);
 543         rb_linebuf_init(LINEBUF_HEAP_SIZE);
 544
 545         init_main_logfile();
 546         newconf_init();
 547         init_s_conf();
 548         init_s_newconf();
 549         init_hash();
 550         clear_scache_hash_table();      /* server cache name table */
 551         init_host_hash();
 552         clear_hash_parse();
 553         init_client();
 554         initUser();
 555         init_hook();
 556         init_channels();
 557         initclass();
 558         initwhowas();
 559         init_stats();
 560         init_reject();
 561         init_cache();
 562         init_monitor();
 563         init_isupport();
 564         load_all_modules(1);
 565 #ifndef STATIC_MODULES
 566         load_core_modules(1);
 567 #endif
 568         init_auth();            /* Initialise the auth code */
 569         init_resolver();        /* Needs to be setup before the io loop */
 570
 571         if (testing_conf)
 572                 fprintf(stderr, "\nBeginning config test\n");
 573         read_conf_files(YES);   /* cold start init conf files */
 574         rehash_bans(0);
 575 #ifndef STATIC_MODULES
 576
 577         mod_add_path(MODULE_DIR);
 578         mod_add_path(MODULE_DIR "/autoload");
 579 #endif
 580
 581         initialize_server_capabs();     /* Set up default_server_capabs */
 582         initialize_global_set_options();
 583
 584         if(ServerInfo.name == NULL)
 585         {
 586                 ierror("no server name specified in serverinfo block.");
 587                 return -1;
 588         }
 589         strlcpy(me.name, ServerInfo.name, sizeof(me.name));
 590
 591         if(ServerInfo.sid[0] == '\0')
 592         {
 593                 ierror("no server sid specified in serverinfo block.");
 594                 return -2;
 595         }
 596         strcpy(me.id, ServerInfo.sid);
 597         init_uid();
 598
 599         /* serverinfo{} description must exist.  If not, error out. */
 600         if(ServerInfo.description == NULL)
 601         {
 602                 ierror("no server description specified in serverinfo block.");
 603                 return -3;
 604         }
 605         strlcpy(me.info, ServerInfo.description, sizeof(me.info));
 606
 607         if (testing_conf)
 608         {
 609                 fprintf(stderr, "\nConfig testing complete.\n");
 610                 fflush(stderr);
 611                 return 0;       /* Why? We want the launcher to exit out. */
 612         }
 613
 614         me.from = &me;
 615         me.servptr = &me;
 616         SetMe(&me);
 617         make_server(&me);
 618         startup_time = rb_current_time();
 619         add_to_client_hash(me.name, &me);
 620         add_to_id_hash(me.id, &me);
 621         me.serv->nameinfo = scache_connect(me.name, me.info, 0);
 622
 623         rb_dlinkAddAlloc(&me, &global_serv_list);
 624
 625         construct_umodebuf();
 626
 627         check_class();
 628         write_pidfile(pidFileName);
 629         load_help();
 630         open_logfiles();
 631
 632         ilog(L_MAIN, "Server Ready");
 633
 634         rb_event_addish("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_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         /* um.  by waiting even longer, that just means we have even *more*
 639          * nick collisions.  what a stupid idea. set an event for the IO loop --fl
 640          */
 641         rb_event_addish("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
 642         rb_event_addonce("try_connections_startup", try_connections, NULL, 0);
 643
 644         rb_event_addish("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
 645
 646         /* Setup the timeout check. I'll shift it later :)  -- adrian */
 647         rb_event_addish("rb_checktimeouts", rb_checktimeouts, NULL, 1);
 648
 649         rb_event_add("check_rehash", check_rehash, NULL, 1);
 650
 651         if(splitmode)
 652                 check_splitmode_ev = rb_event_add("check_splitmode", check_splitmode, NULL, 2);
 653
 654         ServerRunning = 1;
 655
 656         print_startup(getpid());
 657
 658         rb_lib_loop(250);
 659
 660         return 0;
 661 }