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