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 "logger.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
 158         maxconnections = limit.rlim_cur;
 159 #endif /* RLIMIT_NOFILE */
 160 }
 161
 162 static int
 163 make_daemon(void)
 164 {
 165         int pid;
 166         int pip[2];
 167         char c;
 168
 169         if (pipe(pip) < 0)
 170         {
 171                 perror("pipe");
 172                 exit(EXIT_FAILURE);
 173         }
 174         dup2(pip[1], 0);
 175         close(pip[1]);
 176         if((pid = fork()) < 0)
 177         {
 178                 perror("fork");
 179                 exit(EXIT_FAILURE);
 180         }
 181         else if(pid > 0)
 182         {
 183                 close(0);
 184                 /* Wait for initialization to finish, successfully or
 185                  * unsuccessfully. Until this point the child may still
 186                  * write to stdout/stderr.
 187                  * -- jilles */
 188                 if (read(pip[0], &c, 1) > 0)
 189                         exit(EXIT_SUCCESS);
 190                 else
 191                         exit(EXIT_FAILURE);
 192         }
 193
 194         close(pip[0]);
 195         setsid();
 196 /*      fclose(stdin);
 197         fclose(stdout);
 198         fclose(stderr); */
 199
 200         return 0;
 201 }
 202
 203 static int printVersion = 0;
 204
 205 struct lgetopt myopts[] = {
 206         {"dlinefile", &ConfigFileEntry.dlinefile,
 207          STRING, "File to use for dlines.conf"},
 208         {"configfile", &ConfigFileEntry.configfile,
 209          STRING, "File to use for ircd.conf"},
 210         {"klinefile", &ConfigFileEntry.klinefile,
 211          STRING, "File to use for kline.conf"},
 212         {"xlinefile", &ConfigFileEntry.xlinefile,
 213          STRING, "File to use for xline.conf"},
 214         {"resvfile", &ConfigFileEntry.resvfile,
 215          STRING, "File to use for resv.conf"},
 216         {"logfile", &logFileName,
 217          STRING, "File to use for ircd.log"},
 218         {"pidfile", &pidFileName,
 219          STRING, "File to use for process ID"},
 220         {"foreground", &server_state_foreground,
 221          YESNO, "Run in foreground (don't detach)"},
 222         {"version", &printVersion,
 223          YESNO, "Print version and exit"},
 224         {"conftest", &testing_conf,
 225          YESNO, "Test the configuration files and exit"},
 226         {"help", NULL, USAGE, "Print this text"},
 227         {NULL, NULL, STRING, NULL},
 228 };
 229
 230 void
 231 set_time(void)
 232 {
 233         struct timeval newtime;
 234
 235         newtime.tv_sec = 0;
 236         newtime.tv_usec = 0;
 237 #ifdef HAVE_GETTIMEOFDAY
 238         if(gettimeofday(&newtime, NULL) == -1)
 239         {
 240                 ilog(L_MAIN, "Clock Failure (%d)", errno);
 241                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 242                                      "Clock Failure (%d), TS can be corrupted", errno);
 243
 244                 restart("Clock Failure");
 245         }
 246 #else
 247         newtime.tv_sec = time(NULL);
 248
 249 #endif
 250
 251         SystemTime.tv_sec = newtime.tv_sec;
 252         SystemTime.tv_usec = newtime.tv_usec;
 253
 254         rb_set_time();
 255 }
 256
 257 static void
 258 check_rehash(void *unused)
 259 {
 260         /*
 261          * Check to see whether we have to rehash the configuration ..
 262          */
 263         if(dorehash)
 264         {
 265                 rehash(1);
 266                 dorehash = 0;
 267         }
 268
 269         if(dorehashbans)
 270         {
 271                 rehash_bans(1);
 272                 dorehashbans = 0;
 273         }
 274
 275         if(doremotd)
 276         {
 277                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 278                                      "Got signal SIGUSR1, reloading ircd motd file");
 279                 free_cachefile(user_motd);
 280                 user_motd = cache_file(MPATH, "ircd.motd", 0);
 281                 doremotd = 0;
 282         }
 283 }
 284
 285 /*
 286  * initalialize_global_set_options
 287  *
 288  * inputs       - none
 289  * output       - none
 290  * side effects - This sets all global set options needed
 291  */
 292 static void
 293 initialize_global_set_options(void)
 294 {
 295         memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
 296         /* memset( &ConfigFileEntry, 0, sizeof(ConfigFileEntry)); */
 297
 298         GlobalSetOptions.maxclients = ServerInfo.max_clients;
 299         GlobalSetOptions.autoconn = 1;
 300
 301         GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
 302         GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
 303
 304         if(ConfigFileEntry.default_floodcount)
 305                 GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
 306         else
 307                 GlobalSetOptions.floodcount = 10;
 308
 309         split_servers = ConfigChannel.default_split_server_count;
 310         split_users = ConfigChannel.default_split_user_count;
 311
 312         if(split_users && split_servers
 313            && (ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split))
 314         {
 315                 splitmode = 1;
 316                 splitchecking = 1;
 317         }
 318
 319         GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
 320
 321         strlcpy(GlobalSetOptions.operstring,
 322                 ConfigFileEntry.default_operstring,
 323                 sizeof(GlobalSetOptions.operstring));
 324         strlcpy(GlobalSetOptions.adminstring,
 325                 ConfigFileEntry.default_adminstring,
 326                 sizeof(GlobalSetOptions.adminstring));
 327
 328         /* memset( &ConfigChannel, 0, sizeof(ConfigChannel)); */
 329
 330         /* End of global set options */
 331
 332 }
 333
 334 /*
 335  * initialize_server_capabs
 336  *
 337  * inputs       - none
 338  * output       - none
 339  */
 340 static void
 341 initialize_server_capabs(void)
 342 {
 343         default_server_capabs &= ~CAP_ZIP;
 344 }
 345
 346
 347 /*
 348  * write_pidfile
 349  *
 350  * inputs       - filename+path of pid file
 351  * output       - none
 352  * side effects - write the pid of the ircd to filename
 353  */
 354 static void
 355 write_pidfile(const char *filename)
 356 {
 357         FILE *fb;
 358         char buff[32];
 359         if((fb = fopen(filename, "w")))
 360         {
 361                 unsigned int pid = (unsigned int) getpid();
 362
 363                 rb_snprintf(buff, sizeof(buff), "%u\n", pid);
 364                 if((fputs(buff, fb) == -1))
 365                 {
 366                         ilog(L_MAIN, "Error writing %u to pid file %s (%s)",
 367                              pid, filename, strerror(errno));
 368                 }
 369                 fclose(fb);
 370                 return;
 371         }
 372         else
 373         {
 374                 ilog(L_MAIN, "Error opening pid file %s", filename);
 375         }
 376 }
 377
 378 /*
 379  * check_pidfile
 380  *
 381  * inputs       - filename+path of pid file
 382  * output       - none
 383  * side effects - reads pid from pidfile and checks if ircd is in process
 384  *                list. if it is, gracefully exits
 385  * -kre
 386  */
 387 static void
 388 check_pidfile(const char *filename)
 389 {
 390         FILE *fb;
 391         char buff[32];
 392         pid_t pidfromfile;
 393
 394         /* Don't do logging here, since we don't have log() initialised */
 395         if((fb = fopen(filename, "r")))
 396         {
 397                 if(fgets(buff, 20, fb) != NULL)
 398                 {
 399                         pidfromfile = atoi(buff);
 400                         if(!kill(pidfromfile, 0))
 401                         {
 402                                 printf("ircd: daemon is already running\n");
 403                                 exit(-1);
 404                         }
 405                 }
 406                 fclose(fb);
 407         }
 408 }
 409
 410 /*
 411  * setup_corefile
 412  *
 413  * inputs       - nothing
 414  * output       - nothing
 415  * side effects - setups corefile to system limits.
 416  * -kre
 417  */
 418 static void
 419 setup_corefile(void)
 420 {
 421 #ifdef HAVE_SYS_RESOURCE_H
 422         struct rlimit rlim;     /* resource limits */
 423
 424         /* Set corefilesize to maximum */
 425         if(!getrlimit(RLIMIT_CORE, &rlim))
 426         {
 427                 rlim.rlim_cur = rlim.rlim_max;
 428                 setrlimit(RLIMIT_CORE, &rlim);
 429         }
 430 #endif
 431 }
 432
 433 struct ev_entry *check_splitmode_ev = NULL;
 434
 435 /*
 436  * main
 437  *
 438  * Initializes the IRCd.
 439  *
 440  * Inputs       - number of commandline args, args themselves
 441  * Outputs      - none
 442  * Side Effects - this is where the ircd gets going right now
 443  */
 444 int
 445 main(int argc, char *argv[])
 446 {
 447         int fd;
 448
 449         /* Check to see if the user is running us as root, which is a nono */
 450         if(geteuid() == 0)
 451         {
 452                 fprintf(stderr, "Don't run ircd as root!!!\n");
 453                 return -1;
 454         }
 455
 456         /*
 457          * save server boot time right away, so getrusage works correctly
 458          */
 459         set_time();
 460         /*
 461          * Setup corefile size immediately after boot -kre
 462          */
 463         setup_corefile();
 464
 465         ServerRunning = 0;
 466         /* It ain't random, but it ought to be a little harder to guess */
 467         srand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
 468         memset(&me, 0, sizeof(me));
 469         memset(&meLocalUser, 0, sizeof(meLocalUser));
 470         me.localClient = &meLocalUser;
 471
 472         /* Make sure all lists are zeroed */
 473         memset(&unknown_list, 0, sizeof(unknown_list));
 474         memset(&lclient_list, 0, sizeof(lclient_list));
 475         memset(&serv_list, 0, sizeof(serv_list));
 476         memset(&global_serv_list, 0, sizeof(global_serv_list));
 477         memset(&local_oper_list, 0, sizeof(local_oper_list));
 478         memset(&oper_list, 0, sizeof(oper_list));
 479
 480         rb_dlinkAddTail(&me, &me.node, &global_client_list);
 481
 482         memset((void *) &Count, 0, sizeof(Count));
 483         memset((void *) &ServerInfo, 0, sizeof(ServerInfo));
 484         memset((void *) &AdminInfo, 0, sizeof(AdminInfo));
 485
 486         /* Initialise the channel capability usage counts... */
 487         init_chcap_usage_counts();
 488
 489         ConfigFileEntry.dpath = DPATH;
 490         ConfigFileEntry.configfile = CPATH;     /* Server configuration file */
 491         ConfigFileEntry.klinefile = KPATH;      /* Server kline file */
 492         ConfigFileEntry.dlinefile = DLPATH;     /* dline file */
 493         ConfigFileEntry.xlinefile = XPATH;
 494         ConfigFileEntry.resvfile = RESVPATH;
 495         ConfigFileEntry.connect_timeout = 30;   /* Default to 30 */
 496         myargv = argv;
 497         umask(077);             /* better safe than sorry --SRB */
 498
 499         parseargs(&argc, &argv, myopts);
 500
 501         if(printVersion)
 502         {
 503                 printf("ircd: version %s\n", ircd_version);
 504                 exit(EXIT_SUCCESS);
 505         }
 506
 507         if(chdir(ConfigFileEntry.dpath))
 508         {
 509                 fprintf(stderr, "Unable to chdir to %s: %s\n", ConfigFileEntry.dpath, strerror(errno));
 510                 exit(EXIT_FAILURE);
 511         }
 512
 513         setup_signals();
 514
 515 #ifdef __CYGWIN__
 516         server_state_foreground = 1;
 517 #endif
 518
 519         if (testing_conf)
 520                 server_state_foreground = 1;
 521
 522         /* Make sure fd 0, 1 and 2 are in use -- jilles */
 523         do
 524         {
 525                 fd = open("/dev/null", O_RDWR);
 526         } while (fd < 2 && fd != -1);
 527         if (fd > 2)
 528                 close(fd);
 529         else if (fd == -1)
 530                 exit(1);
 531
 532         /* Check if there is pidfile and daemon already running */
 533         if(!testing_conf)
 534         {
 535                 check_pidfile(pidFileName);
 536
 537                 if(!server_state_foreground)
 538                         make_daemon();
 539                 inotice("starting %s ...", ircd_version);
 540         }
 541
 542         /* Init the event subsystem */
 543         init_sys();
 544         rb_lib_init(ircd_log_cb, ircd_restart_cb, ircd_die_cb, !server_state_foreground, maxconnections, DNODE_HEAP_SIZE, FD_HEAP_SIZE);
 545         rb_linebuf_init(LINEBUF_HEAP_SIZE);
 546
 547         init_main_logfile();
 548         newconf_init();
 549         init_s_conf();
 550         init_s_newconf();
 551         init_hash();
 552         clear_scache_hash_table();      /* server cache name table */
 553         init_host_hash();
 554         clear_hash_parse();
 555         init_client();
 556         initUser();
 557         init_hook();
 558         init_channels();
 559         initclass();
 560         initwhowas();
 561         init_stats();
 562         init_reject();
 563         init_cache();
 564         init_monitor();
 565         init_isupport();
 566         load_all_modules(1);
 567 #ifndef STATIC_MODULES
 568         load_core_modules(1);
 569 #endif
 570         init_auth();            /* Initialise the auth code */
 571         init_resolver();        /* Needs to be setup before the io loop */
 572
 573         if (testing_conf)
 574                 fprintf(stderr, "\nBeginning config test\n");
 575         read_conf_files(YES);   /* cold start init conf files */
 576         rehash_bans(0);
 577 #ifndef STATIC_MODULES
 578
 579         mod_add_path(MODULE_DIR);
 580         mod_add_path(MODULE_DIR "/autoload");
 581 #endif
 582
 583         initialize_server_capabs();     /* Set up default_server_capabs */
 584         initialize_global_set_options();
 585
 586         if(ServerInfo.name == NULL)
 587         {
 588                 ierror("no server name specified in serverinfo block.");
 589                 return -1;
 590         }
 591         strlcpy(me.name, ServerInfo.name, sizeof(me.name));
 592
 593         if(ServerInfo.sid[0] == '\0')
 594         {
 595                 ierror("no server sid specified in serverinfo block.");
 596                 return -2;
 597         }
 598         strcpy(me.id, ServerInfo.sid);
 599         init_uid();
 600
 601         /* serverinfo{} description must exist.  If not, error out. */
 602         if(ServerInfo.description == NULL)
 603         {
 604                 ierror("no server description specified in serverinfo block.");
 605                 return -3;
 606         }
 607         strlcpy(me.info, ServerInfo.description, sizeof(me.info));
 608
 609         if (testing_conf)
 610         {
 611                 fprintf(stderr, "\nConfig testing complete.\n");
 612                 fflush(stderr);
 613                 return 0;       /* Why? We want the launcher to exit out. */
 614         }
 615
 616         me.from = &me;
 617         me.servptr = &me;
 618         SetMe(&me);
 619         make_server(&me);
 620         startup_time = rb_current_time();
 621         add_to_client_hash(me.name, &me);
 622         add_to_id_hash(me.id, &me);
 623         me.serv->nameinfo = scache_connect(me.name, me.info, 0);
 624
 625         rb_dlinkAddAlloc(&me, &global_serv_list);
 626
 627         construct_umodebuf();
 628
 629         check_class();
 630         write_pidfile(pidFileName);
 631         load_help();
 632         open_logfiles();
 633
 634         ilog(L_MAIN, "Server Ready");
 635
 636         rb_event_addish("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
 637
 638         /* We want try_connections to be called as soon as possible now! -- adrian */
 639         /* No, 'cause after a restart it would cause all sorts of nick collides */
 640         /* um.  by waiting even longer, that just means we have even *more*
 641          * nick collisions.  what a stupid idea. set an event for the IO loop --fl
 642          */
 643         rb_event_addish("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
 644         rb_event_addonce("try_connections_startup", try_connections, NULL, 0);
 645
 646         rb_event_addish("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME);
 647
 648         /* Setup the timeout check. I'll shift it later :)  -- adrian */
 649         rb_event_addish("rb_checktimeouts", rb_checktimeouts, NULL, 1);
 650
 651         rb_event_add("check_rehash", check_rehash, NULL, 1);
 652
 653         if(splitmode)
 654                 check_splitmode_ev = rb_event_add("check_splitmode", check_splitmode, NULL, 2);
 655
 656         ServerRunning = 1;
 657
 658         print_startup(getpid());
 659
 660         rb_lib_loop(250);
 661
 662         return 0;
 663 }