src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Now with added unF! ;) */
  18
  19 #include <algorithm>
  20 #include "inspircd_config.h"
  21 #include "inspircd.h"
  22 #include "configreader.h"
  23 #include <fcntl.h>
  24 #include <sys/errno.h>
  25 #include <sys/ioctl.h>
  26 #include <signal.h>
  27 #include <time.h>
  28 #include <string>
  29 #include <exception>
  30 #include <stdexcept>
  31 #include <new>
  32 #include <map>
  33 #include <sstream>
  34 #include <fstream>
  35 #include <vector>
  36 #include <deque>
  37 #ifdef THREADED_DNS
  38 #include <pthread.h>
  39 #endif
  40 #include "users.h"
  41 #include "ctables.h"
  42 #include "globals.h"
  43 #include "modules.h"
  44 #include "dynamic.h"
  45 #include "wildcard.h"
  46 #include "message.h"
  47 #include "mode.h"
  48 #include "commands.h"
  49 #include "xline.h"
  50 #include "inspstring.h"
  51 #include "dnsqueue.h"
  52 #include "helperfuncs.h"
  53 #include "hashcomp.h"
  54 #include "socketengine.h"
  55 #include "userprocess.h"
  56 #include "socket.h"
  57 #include "typedefs.h"
  58 #include "command_parse.h"
  59
  60 InspIRCd* ServerInstance;
  61
  62 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  63 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  64
  65 extern ModuleList modules;
  66 extern FactoryList factory;
  67
  68 std::vector<InspSocket*> module_sockets;
  69 std::vector<userrec*> local_users;
  70
  71 extern int MODCOUNT;
  72 extern char LOG_FILE[MAXBUF];
  73 int openSockfd[MAX_DESCRIPTORS];
  74 int yield_depth;
  75 int iterations = 0;
  76
  77 insp_sockaddr client, server;
  78
  79 socklen_t length;
  80
  81 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  82
  83 time_t TIME = time(NULL), OLDTIME = time(NULL);
  84
  85 // This table references users by file descriptor.
  86 // its an array to make it VERY fast, as all lookups are referenced
  87 // by an integer, meaning there is no need for a scan/search operation.
  88 userrec* fd_ref_table[MAX_DESCRIPTORS];
  89
  90 Server* MyServer = new Server;
  91 ServerConfig *Config = new ServerConfig;
  92
  93 user_hash clientlist;
  94 chan_hash chanlist;
  95
  96 servernamelist servernames;
  97 char lowermap[255];
  98
  99 void AddServerName(const std::string &servername)
 100 {
 101         log(DEBUG,"Adding server name: %s",servername.c_str());
 102
 103         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
 104                 servernames.push_back(servername); /* Wasn't already there. */
 105 }
 106
 107 const char* FindServerNamePtr(const std::string &servername)
 108 {
 109         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
 110
 111         if(iter == servernames.end())
 112         {
 113                 AddServerName(servername);
 114                 iter = --servernames.end();
 115         }
 116
 117         return iter->c_str();
 118 }
 119
 120 bool FindServerName(const std::string &servername)
 121 {
 122         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 123 }
 124
 125 void Exit(int status)
 126 {
 127         if (Config->log_file)
 128                 fclose(Config->log_file);
 129         send_error("Server shutdown.");
 130         exit (status);
 131 }
 132
 133 void Start()
 134 {
 135         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 136         printf("(C) ChatSpike Development team.\033[0m\n\n");
 137         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om\033[0m\n");
 138         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 139         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 140 }
 141
 142 void Killed(int status)
 143 {
 144         if (Config->log_file)
 145                 fclose(Config->log_file);
 146         send_error("Server terminated.");
 147         exit(status);
 148 }
 149
 150 void Rehash(int status)
 151 {
 152         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 153         fclose(Config->log_file);
 154         OpenLog(NULL,0);
 155         Config->Read(false,NULL);
 156         FOREACH_MOD(I_OnRehash,OnRehash(""));
 157 }
 158
 159 void SetSignals()
 160 {
 161         signal (SIGALRM, SIG_IGN);
 162         signal (SIGHUP, Rehash);
 163         signal (SIGPIPE, SIG_IGN);
 164         signal (SIGTERM, Exit);
 165         signal (SIGSEGV, Error);
 166 }
 167
 168 bool DaemonSeed()
 169 {
 170         int childpid;
 171         if ((childpid = fork ()) < 0)
 172                 return (ERROR);
 173         else if (childpid > 0)
 174         {
 175                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 176                 sleep(6);
 177                 exit (0);
 178         }
 179         setsid ();
 180         umask (007);
 181         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 182
 183         rlimit rl;
 184         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 185         {
 186                 log(DEFAULT,"Failed to getrlimit()!");
 187                 return false;
 188         }
 189         else
 190         {
 191                 rl.rlim_cur = rl.rlim_max;
 192                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 193                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 194         }
 195
 196         return true;
 197 }
 198
 199 void WritePID(const std::string &filename)
 200 {
 201         std::ofstream outfile(filename.c_str());
 202         if (outfile.is_open())
 203         {
 204                 outfile << getpid();
 205                 outfile.close();
 206         }
 207         else
 208         {
 209                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 210                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 211                 Exit(0);
 212         }
 213 }
 214
 215 std::string InspIRCd::GetRevision()
 216 {
 217         return REVISION;
 218 }
 219
 220 void InspIRCd::MakeLowerMap()
 221 {
 222         // initialize the lowercase mapping table
 223         for (unsigned int cn = 0; cn < 256; cn++)
 224                 lowermap[cn] = cn;
 225         // lowercase the uppercase chars
 226         for (unsigned int cn = 65; cn < 91; cn++)
 227                 lowermap[cn] = tolower(cn);
 228         // now replace the specific chars for scandanavian comparison
 229         lowermap[(unsigned)'['] = '{';
 230         lowermap[(unsigned)']'] = '}';
 231         lowermap[(unsigned)'\\'] = '|';
 232 }
 233
 234 InspIRCd::InspIRCd(int argc, char** argv)
 235 {
 236         Start();
 237         module_sockets.clear();
 238         this->startup_time = time(NULL);
 239         srand(time(NULL));
 240         log(DEBUG,"*** InspIRCd starting up!");
 241         if (!FileExists(CONFIG_FILE))
 242         {
 243                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 244                 log(DEFAULT,"main: no config");
 245                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 246                 Exit(ERROR);
 247         }
 248         *LOG_FILE = 0;
 249         if (argc > 1) {
 250                 for (int i = 1; i < argc; i++)
 251                 {
 252                         if (!strcmp(argv[i],"-nofork"))
 253                         {
 254                                 Config->nofork = true;
 255                         }
 256                         else if(!strcmp(argv[i],"-debug"))
 257                         {
 258                                 Config->forcedebug = true;
 259                         }
 260                         else if(!strcmp(argv[i],"-nolog"))
 261                         {
 262                                 Config->writelog = false;
 263                         }
 264                         else if (!strcmp(argv[i],"-wait"))
 265                         {
 266                                 sleep(6);
 267                         }
 268                         else if (!strcmp(argv[i],"-nolimit"))
 269                         {
 270                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 271                         }
 272                         else if (!strcmp(argv[i],"-logfile"))
 273                         {
 274                                 if (argc > i+1)
 275                                 {
 276                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 277                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 278                                 }
 279                                 else
 280                                 {
 281                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 282                                         Exit(ERROR);
 283                                 }
 284                         }
 285                 }
 286         }
 287
 288         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 289
 290         this->MakeLowerMap();
 291
 292         OpenLog(argv, argc);
 293         this->stats = new serverstats();
 294         Config->ClearStack();
 295         Config->Read(true,NULL);
 296         CheckRoot();
 297         this->ModeGrok = new ModeParser();
 298         this->Parser = new CommandParser();
 299         AddServerName(Config->ServerName);
 300         CheckDie();
 301         stats->BoundPortCount = BindPorts(true);
 302
 303         for(int t = 0; t < 255; t++)
 304                 Config->global_implementation[t] = 0;
 305
 306         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 307
 308         printf("\n");
 309         SetSignals();
 310         if (!Config->nofork)
 311         {
 312                 if (!DaemonSeed())
 313                 {
 314                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 315                         Exit(ERROR);
 316                 }
 317         }
 318
 319         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 320          * initialize the socket engine.
 321          */
 322         SE = new SocketEngine();
 323
 324         /* We must load the modules AFTER initializing the socket engine, now */
 325
 326         return;
 327 }
 328
 329 std::string InspIRCd::GetVersionString()
 330 {
 331         char versiondata[MAXBUF];
 332 #ifdef THREADED_DNS
 333         char dnsengine[] = "multithread";
 334 #else
 335         char dnsengine[] = "singlethread";
 336 #endif
 337         if (*Config->CustomVersion)
 338         {
 339                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 340         }
 341         else
 342         {
 343                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 344         }
 345         return versiondata;
 346 }
 347
 348 char* InspIRCd::ModuleError()
 349 {
 350         return MODERR;
 351 }
 352
 353 void InspIRCd::erase_factory(int j)
 354 {
 355         int v = 0;
 356         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 357         {
 358                 if (v == j)
 359                 {
 360                         factory.erase(t);
 361                         factory.push_back(NULL);
 362                         return;
 363                 }
 364                 v++;
 365         }
 366 }
 367
 368 void InspIRCd::erase_module(int j)
 369 {
 370         int v1 = 0;
 371         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 372         {
 373                 if (v1 == j)
 374                 {
 375                         delete *m;
 376                         modules.erase(m);
 377                         modules.push_back(NULL);
 378                         break;
 379                 }
 380                 v1++;
 381         }
 382         int v2 = 0;
 383         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 384         {
 385                 if (v2 == j)
 386                 {
 387                        Config->module_names.erase(v);
 388                        break;
 389                 }
 390                 v2++;
 391         }
 392
 393 }
 394
 395 void InspIRCd::MoveTo(std::string modulename,int slot)
 396 {
 397         unsigned int v2 = 256;
 398         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 399         {
 400                 if (Config->module_names[v] == modulename)
 401                 {
 402                         // found an instance, swap it with the item at MODCOUNT
 403                         v2 = v;
 404                         break;
 405                 }
 406         }
 407         if ((v2 != (unsigned int)slot) && (v2 < 256))
 408         {
 409                 // Swap the module names over
 410                 Config->module_names[v2] = Config->module_names[slot];
 411                 Config->module_names[slot] = modulename;
 412                 // now swap the module factories
 413                 ircd_module* temp = factory[v2];
 414                 factory[v2] = factory[slot];
 415                 factory[slot] = temp;
 416                 // now swap the module objects
 417                 Module* temp_module = modules[v2];
 418                 modules[v2] = modules[slot];
 419                 modules[slot] = temp_module;
 420                 // now swap the implement lists (we dont
 421                 // need to swap the global or recount it)
 422                 for (int n = 0; n < 255; n++)
 423                 {
 424                         char x = Config->implement_lists[v2][n];
 425                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 426                         Config->implement_lists[slot][n] = x;
 427                 }
 428         }
 429         else
 430         {
 431                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 432         }
 433 }
 434
 435 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 436 {
 437         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 438         {
 439                 if (Config->module_names[v] == after)
 440                 {
 441                         MoveTo(modulename, v);
 442                         return;
 443                 }
 444         }
 445 }
 446
 447 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 448 {
 449         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 450         {
 451                 if (Config->module_names[v] == before)
 452                 {
 453                         if (v > 0)
 454                         {
 455                                 MoveTo(modulename, v-1);
 456                         }
 457                         else
 458                         {
 459                                 MoveTo(modulename, v);
 460                         }
 461                         return;
 462                 }
 463         }
 464 }
 465
 466 void InspIRCd::MoveToFirst(std::string modulename)
 467 {
 468         MoveTo(modulename,0);
 469 }
 470
 471 void InspIRCd::MoveToLast(std::string modulename)
 472 {
 473         MoveTo(modulename,MODCOUNT);
 474 }
 475
 476 void InspIRCd::BuildISupport()
 477 {
 478         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 479         std::stringstream v;
 480         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 481         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 482         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 483         Config->data005 = v.str();
 484         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 485 }
 486
 487 bool InspIRCd::UnloadModule(const char* filename)
 488 {
 489         std::string filename_str = filename;
 490         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 491         {
 492                 if (Config->module_names[j] == filename_str)
 493                 {
 494                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 495                         {
 496                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 497                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 498                                 return false;
 499                         }
 500                         /* Give the module a chance to tidy out all its metadata */
 501                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 502                         {
 503                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 504                         }
 505                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 506                         {
 507                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 508                         }
 509
 510                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 511
 512                         for(int t = 0; t < 255; t++)
 513                         {
 514                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 515                         }
 516
 517                         /* We have to renumber implement_lists after unload because the module numbers change!
 518                          */
 519                         for(int j2 = j; j2 < 254; j2++)
 520                         {
 521                                 for(int t = 0; t < 255; t++)
 522                                 {
 523                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 524                                 }
 525                         }
 526
 527                         // found the module
 528                         log(DEBUG,"Deleting module...");
 529                         erase_module(j);
 530                         log(DEBUG,"Erasing module entry...");
 531                         erase_factory(j);
 532                         log(DEBUG,"Removing dependent commands...");
 533                         Parser->RemoveCommands(filename);
 534                         log(DEFAULT,"Module %s unloaded",filename);
 535                         MODCOUNT--;
 536                         BuildISupport();
 537                         return true;
 538                 }
 539         }
 540         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 541         snprintf(MODERR,MAXBUF,"Module not loaded");
 542         return false;
 543 }
 544
 545 bool InspIRCd::LoadModule(const char* filename)
 546 {
 547         char modfile[MAXBUF];
 548 #ifdef STATIC_LINK
 549         strlcpy(modfile,filename,MAXBUF);
 550 #else
 551         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 552 #endif
 553         std::string filename_str = filename;
 554 #ifndef STATIC_LINK
 555 #ifndef IS_CYGWIN
 556         if (!DirValid(modfile))
 557         {
 558                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 559                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 560                 return false;
 561         }
 562 #endif
 563 #endif
 564         log(DEBUG,"Loading module: %s",modfile);
 565 #ifndef STATIC_LINK
 566         if (FileExists(modfile))
 567         {
 568 #endif
 569                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 570                 {
 571                         if (Config->module_names[j] == filename_str)
 572                         {
 573                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 574                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 575                                 return false;
 576                         }
 577                 }
 578                 ircd_module* a = new ircd_module(modfile);
 579                 factory[MODCOUNT+1] = a;
 580                 if (factory[MODCOUNT+1]->LastError())
 581                 {
 582                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 583                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 584                         return false;
 585                 }
 586                 try
 587                 {
 588                         if (factory[MODCOUNT+1]->factory)
 589                         {
 590                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 591                                 modules[MODCOUNT+1] = m;
 592                                 /* save the module and the module's classfactory, if
 593                                  * this isnt done, random crashes can occur :/ */
 594                                 Config->module_names.push_back(filename);
 595
 596                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 597                                 for(int t = 0; t < 255; t++)
 598                                         x[t] = 0;
 599
 600                                 modules[MODCOUNT+1]->Implements(x);
 601
 602                                 for(int t = 0; t < 255; t++)
 603                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 604                         }
 605                         else
 606                         {
 607                                 log(DEFAULT,"Unable to load %s",modfile);
 608                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 609                                 return false;
 610                         }
 611                 }
 612                 catch (ModuleException& modexcept)
 613                 {
 614                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 615                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 616                         return false;
 617                 }
 618 #ifndef STATIC_LINK
 619         }
 620         else
 621         {
 622                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 623                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 624                 return false;
 625         }
 626 #endif
 627         MODCOUNT++;
 628         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 629         // now work out which modules, if any, want to move to the back of the queue,
 630         // and if they do, move them there.
 631         std::vector<std::string> put_to_back;
 632         std::vector<std::string> put_to_front;
 633         std::map<std::string,std::string> put_before;
 634         std::map<std::string,std::string> put_after;
 635         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 636         {
 637                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 638                 {
 639                         put_to_back.push_back(Config->module_names[j]);
 640                 }
 641                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 642                 {
 643                         put_to_front.push_back(Config->module_names[j]);
 644                 }
 645                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 646                 {
 647                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 648                 }
 649                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 650                 {
 651                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 652                 }
 653         }
 654         for (unsigned int j = 0; j < put_to_back.size(); j++)
 655         {
 656                 MoveToLast(put_to_back[j]);
 657         }
 658         for (unsigned int j = 0; j < put_to_front.size(); j++)
 659         {
 660                 MoveToFirst(put_to_front[j]);
 661         }
 662         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 663         {
 664                 MoveBefore(j->first,j->second);
 665         }
 666         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 667         {
 668                 MoveAfter(j->first,j->second);
 669         }
 670         BuildISupport();
 671         return true;
 672 }
 673
 674 void InspIRCd::DoOneIteration(bool process_module_sockets)
 675 {
 676         int activefds[MAX_DESCRIPTORS];
 677         int incomingSockfd;
 678         int in_port;
 679         userrec* cu = NULL;
 680         InspSocket* s = NULL;
 681         InspSocket* s_del = NULL;
 682         unsigned int numberactive;
 683         insp_sockaddr sock_us;     // our port number
 684         socklen_t uslen;         // length of our port number
 685
 686         if (yield_depth > 100)
 687                 return;
 688
 689         yield_depth++;
 690
 691         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 692          * Once per loop iteration is pleanty.
 693          */
 694         OLDTIME = TIME;
 695         TIME = time(NULL);
 696
 697         /* Run background module timers every few seconds
 698          * (the docs say modules shouldnt rely on accurate
 699          * timing using this event, so we dont have to
 700          * time this exactly).
 701          */
 702         if (((TIME % 5) == 0) && (!expire_run))
 703         {
 704                 expire_lines();
 705                 if (process_module_sockets)
 706                 {
 707                         /* Fix by brain - the addition of DoOneIteration means that this
 708                          * can end up getting called recursively in the following pattern:
 709                          *
 710                          * m_spanningtree DoPingChecks
 711                          * (server pings out and is squit)
 712                          * (squit causes call to DoOneIteration)
 713                          * DoOneIteration enters here
 714                          * calls DoBackground timer
 715                          * enters m_spanningtree DoPingChecks... see step 1.
 716                          *
 717                          * This should do the job and fix the bug.
 718                          */
 719                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 720                 }
 721                 TickMissedTimers(TIME);
 722                 expire_run = true;
 723                 yield_depth--;
 724                 return;
 725         }
 726         else if ((TIME % 5) == 1)
 727         {
 728                 expire_run = false;
 729         }
 730
 731         if (iterations++ == 15)
 732         {
 733                 iterations = 0;
 734                 DoBackgroundUserStuff(TIME);
 735         }
 736
 737         /* Once a second, do the background processing */
 738         if (TIME != OLDTIME)
 739         {
 740                 if (TIME < OLDTIME)
 741                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 742                 if ((TIME % 3600) == 0)
 743                 {
 744                         MaintainWhoWas(TIME);
 745                 }
 746         }
 747
 748         /* Process timeouts on module sockets each time around
 749          * the loop. There shouldnt be many module sockets, at
 750          * most, 20 or so, so this won't be much of a performance
 751          * hit at all.
 752          */
 753         if (process_module_sockets)
 754                 DoSocketTimeouts(TIME);
 755
 756         TickTimers(TIME);
 757
 758         /* Call the socket engine to wait on the active
 759          * file descriptors. The socket engine has everything's
 760          * descriptors in its list... dns, modules, users,
 761          * servers... so its nice and easy, just one call.
 762          */
 763         if (!(numberactive = SE->Wait(activefds)))
 764         {
 765                 yield_depth--;
 766                 return;
 767         }
 768
 769         /**
 770          * Now process each of the fd's. For users, we have a fast
 771          * lookup table which can find a user by file descriptor, so
 772          * processing them by fd isnt expensive. If we have a lot of
 773          * listening ports or module sockets though, things could get
 774          * ugly.
 775          */
 776         log(DEBUG,"There are %d fd's to process.",numberactive);
 777
 778         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 779         {
 780                 int socket_type = SE->GetType(activefds[activefd]);
 781                 switch (socket_type)
 782                 {
 783                         case X_ESTAB_CLIENT:
 784
 785                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 786                                 cu = fd_ref_table[activefds[activefd]];
 787                                 if (cu)
 788                                         ProcessUser(cu);
 789
 790                         break;
 791
 792                         case X_ESTAB_MODULE:
 793
 794                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 795
 796                                 if (!process_module_sockets)
 797                                         break;
 798
 799                                 /* Process module-owned sockets.
 800                                  * Modules are encouraged to inherit their sockets from
 801                                  * InspSocket so we can process them neatly like this.
 802                                  */
 803                                 s = socket_ref[activefds[activefd]];
 804
 805                                 if ((s) && (!s->Poll()))
 806                                 {
 807                                         log(DEBUG,"inspircd.cpp: Socket poll returned false, close and bail");
 808                                         SE->DelFd(s->GetFd());
 809                                         socket_ref[activefds[activefd]] = NULL;
 810                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 811                                         {
 812                                                 s_del = (InspSocket*)*a;
 813                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 814                                                 {
 815                                                         module_sockets.erase(a);
 816                                                         break;
 817                                                 }
 818                                         }
 819                                         s->Close();
 820                                         delete s;
 821                                 }
 822                                 else if (!s)
 823                                 {
 824                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 825                                         SE->DelFd(s->GetFd());
 826                                 }
 827                         break;
 828
 829                         case X_ESTAB_DNS:
 830                                 /* When we are using single-threaded dns,
 831                                  * the sockets for dns end up in our mainloop.
 832                                  * When we are using multi-threaded dns,
 833                                  * each thread has its own basic poll() loop
 834                                  * within it, making them 'fire and forget'
 835                                  * and independent of the mainloop.
 836                                  */
 837 #ifndef THREADED_DNS
 838                                 log(DEBUG,"Type: X_ESTAB_DNS: fd=%d",activefds[activefd]);
 839                                 dns_poll(activefds[activefd]);
 840 #endif
 841                         break;
 842
 843                         case X_LISTEN:
 844
 845                                 log(DEBUG,"Type: X_LISTEN_MODULE: fd=%d",activefds[activefd]);
 846
 847                                 /* It's a listener */
 848                                 uslen = sizeof(sock_us);
 849                                 length = sizeof(client);
 850                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 851
 852                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 853                                 {
 854                                         in_port = ntohs(sock_us.sin_port);
 855                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 856                                         /* Years and years ago, we used to resolve here
 857                                          * using gethostbyaddr(). That is sucky and we
 858                                          * don't do that any more...
 859                                          */
 860                                         NonBlocking(incomingSockfd);
 861                                         if (Config->GetIOHook(in_port))
 862                                         {
 863                                                 try
 864                                                 {
 865                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 866                                                 }
 867                                                 catch (ModuleException& modexcept)
 868                                                 {
 869                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 870                                                 }
 871                                         }
 872                                         stats->statsAccept++;
 873                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 874                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 875                                 }
 876                                 else
 877                                 {
 878                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 879                                         shutdown(incomingSockfd,2);
 880                                         close(incomingSockfd);
 881                                         stats->statsRefused++;
 882                                 }
 883                         break;
 884
 885                         default:
 886                                 /* Something went wrong if we're in here.
 887                                  * In fact, so wrong, im not quite sure
 888                                  * what we would do, so for now, its going
 889                                  * to safely do bugger all.
 890                                  */
 891                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 892                                 SE->DelFd(activefds[activefd]);
 893                         break;
 894                 }
 895         }
 896         yield_depth--;
 897 }
 898
 899 int InspIRCd::Run()
 900 {
 901         /* Until THIS point, ServerInstance == NULL */
 902
 903         LoadAllModules(this);
 904
 905         /* Just in case no modules were loaded - fix for bug #101 */
 906         this->BuildISupport();
 907
 908         printf("\nInspIRCd is now running!\n");
 909
 910         if (!Config->nofork)
 911         {
 912                 fclose(stdout);
 913                 fclose(stderr);
 914                 fclose(stdin);
 915         }
 916
 917         /* Add the listening sockets used for client inbound connections
 918          * to the socket engine
 919          */
 920         for (int count = 0; count < stats->BoundPortCount; count++)
 921                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 922
 923         WritePID(Config->PID);
 924
 925         /* main loop, this never returns */
 926         expire_run = false;
 927         yield_depth = 0;
 928         iterations = 0;
 929
 930         while (true)
 931         {
 932                 DoOneIteration(true);
 933         }
 934         /* This is never reached -- we hope! */
 935         return 0;
 936 }
 937
 938 /**********************************************************************************/
 939
 940 /**
 941  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 942  */
 943
 944 int main(int argc, char** argv)
 945 {
 946         try
 947         {
 948                 ServerInstance = new InspIRCd(argc, argv);
 949                 ServerInstance->Run();
 950                 delete ServerInstance;
 951         }
 952         catch (std::bad_alloc)
 953         {
 954                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
 955                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 956                 printf("Out of memory! (got exception std::bad_alloc!");
 957         }
 958         return 0;
 959 }