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 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include <fcntl.h>
  25 #include <sys/errno.h>
  26 #include <sys/ioctl.h>
  27 #include <time.h>
  28 #include <string>
  29 #ifdef GCC3
  30 #include <ext/hash_map>
  31 #else
  32 #include <hash_map>
  33 #endif
  34 #include <map>
  35 #include <sstream>
  36 #include <vector>
  37 #include <deque>
  38 #ifdef THREADED_DNS
  39 #include <pthread.h>
  40 #endif
  41 #include "users.h"
  42 #include "ctables.h"
  43 #include "globals.h"
  44 #include "modules.h"
  45 #include "dynamic.h"
  46 #include "wildcard.h"
  47 #include "message.h"
  48 #include "mode.h"
  49 #include "commands.h"
  50 #include "xline.h"
  51 #include "inspstring.h"
  52 #include "dnsqueue.h"
  53 #include "helperfuncs.h"
  54 #include "hashcomp.h"
  55 #include "socketengine.h"
  56 #include "userprocess.h"
  57 #include "socket.h"
  58 #include "typedefs.h"
  59 #include "command_parse.h"
  60
  61 InspIRCd* ServerInstance;
  62
  63 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  64 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  65
  66 extern std::vector<Module*> modules;
  67 extern std::vector<ircd_module*> factory;
  68
  69 std::vector<InspSocket*> module_sockets;
  70 std::vector<userrec*> local_users;
  71
  72 extern int MODCOUNT;
  73 extern char LOG_FILE[MAXBUF];
  74 int openSockfd[MAXSOCKS];
  75 int yield_depth;
  76 int iterations = 0;
  77 sockaddr_in client,server;
  78 socklen_t length;
  79
  80 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  81
  82 time_t TIME = time(NULL), OLDTIME = time(NULL);
  83
  84 // This table references users by file descriptor.
  85 // its an array to make it VERY fast, as all lookups are referenced
  86 // by an integer, meaning there is no need for a scan/search operation.
  87 userrec* fd_ref_table[MAX_DESCRIPTORS];
  88
  89 Server* MyServer = new Server;
  90 ServerConfig *Config = new ServerConfig;
  91
  92 user_hash clientlist;
  93 chan_hash chanlist;
  94
  95 servernamelist servernames;
  96 char lowermap[255];
  97
  98 void AddServerName(std::string servername)
  99 {
 100         log(DEBUG,"Adding server name: %s",servername.c_str());
 101         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 102         {
 103                 if (*a == servername)
 104                         return;
 105         }
 106         servernames.push_back(servername);
 107 }
 108
 109 const char* FindServerNamePtr(std::string servername)
 110 {
 111         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 112         {
 113                 if (*a == servername)
 114                         return a->c_str();
 115         }
 116         AddServerName(servername);
 117         return FindServerNamePtr(servername);
 118 }
 119
 120 bool FindServerName(std::string servername)
 121 {
 122         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 123         {
 124                 if (*a == servername)
 125                         return true;
 126         }
 127         return false;
 128 }
 129
 130 std::string InspIRCd::GetRevision()
 131 {
 132         return REVISION;
 133 }
 134
 135 void InspIRCd::MakeLowerMap()
 136 {
 137         // initialize the lowercase mapping table
 138         for (unsigned int cn = 0; cn < 256; cn++)
 139                 lowermap[cn] = cn;
 140         // lowercase the uppercase chars
 141         for (unsigned int cn = 65; cn < 91; cn++)
 142                 lowermap[cn] = tolower(cn);
 143         // now replace the specific chars for scandanavian comparison
 144         lowermap[(unsigned)'['] = '{';
 145         lowermap[(unsigned)']'] = '}';
 146         lowermap[(unsigned)'\\'] = '|';
 147 }
 148
 149 InspIRCd::InspIRCd(int argc, char** argv)
 150 {
 151         Start();
 152         module_sockets.clear();
 153         this->startup_time = time(NULL);
 154         srand(time(NULL));
 155         log(DEBUG,"*** InspIRCd starting up!");
 156         if (!FileExists(CONFIG_FILE))
 157         {
 158                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 159                 log(DEFAULT,"main: no config");
 160                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 161                 Exit(ERROR);
 162         }
 163         *LOG_FILE = 0;
 164         if (argc > 1) {
 165                 for (int i = 1; i < argc; i++)
 166                 {
 167                         if (!strcmp(argv[i],"-nofork")) {
 168                                 Config->nofork = true;
 169                         }
 170                         if (!strcmp(argv[i],"-wait")) {
 171                                 sleep(6);
 172                         }
 173                         if (!strcmp(argv[i],"-nolimit")) {
 174                                 Config->unlimitcore = true;
 175                         }
 176                         if (!strcmp(argv[i],"-logfile")) {
 177                                 if (argc > i+1)
 178                                 {
 179                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 180                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 181                                 }
 182                                 else
 183                                 {
 184                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 185                                         Exit(ERROR);
 186                                 }
 187                         }
 188                 }
 189         }
 190
 191         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 192
 193         this->MakeLowerMap();
 194
 195         OpenLog(argv, argc);
 196         Config->ClearStack();
 197         Config->Read(true,NULL);
 198         CheckRoot();
 199         this->ModeGrok = new ModeParser();
 200         this->Parser = new CommandParser();
 201         this->stats = new serverstats();
 202         AddServerName(Config->ServerName);
 203         CheckDie();
 204         stats->BoundPortCount = BindPorts();
 205
 206         for(int t = 0; t < 255; t++)
 207                 Config->global_implementation[t] = 0;
 208
 209         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 210
 211         printf("\n");
 212         SetSignals();
 213         if (!Config->nofork)
 214         {
 215                 if (DaemonSeed() == ERROR)
 216                 {
 217                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 218                         Exit(ERROR);
 219                 }
 220         }
 221
 222         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 223          * initialize the socket engine.
 224          */
 225         SE = new SocketEngine();
 226
 227         /* We must load the modules AFTER initializing the socket engine, now */
 228
 229         return;
 230 }
 231
 232 std::string InspIRCd::GetVersionString()
 233 {
 234         char versiondata[MAXBUF];
 235 #ifdef THREADED_DNS
 236         char dnsengine[] = "multithread";
 237 #else
 238         char dnsengine[] = "singlethread";
 239 #endif
 240         if (*Config->CustomVersion)
 241         {
 242                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 243         }
 244         else
 245         {
 246                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 247         }
 248         return versiondata;
 249 }
 250
 251 char* InspIRCd::ModuleError()
 252 {
 253         return MODERR;
 254 }
 255
 256 void InspIRCd::erase_factory(int j)
 257 {
 258         int v = 0;
 259         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 260         {
 261                 if (v == j)
 262                 {
 263                         factory.erase(t);
 264                         factory.push_back(NULL);
 265                         return;
 266                 }
 267                 v++;
 268         }
 269 }
 270
 271 void InspIRCd::erase_module(int j)
 272 {
 273         int v1 = 0;
 274         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 275         {
 276                 if (v1 == j)
 277                 {
 278                         delete *m;
 279                         modules.erase(m);
 280                         modules.push_back(NULL);
 281                         break;
 282                 }
 283                 v1++;
 284         }
 285         int v2 = 0;
 286         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 287         {
 288                 if (v2 == j)
 289                 {
 290                        Config->module_names.erase(v);
 291                        break;
 292                 }
 293                 v2++;
 294         }
 295
 296 }
 297
 298 void InspIRCd::MoveTo(std::string modulename,int slot)
 299 {
 300         unsigned int v2 = 256;
 301         log(DEBUG,"Moving %s to slot %d",modulename.c_str(),slot);
 302         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 303         {
 304                 if (Config->module_names[v] == modulename)
 305                 {
 306                         // found an instance, swap it with the item at MODCOUNT
 307                         v2 = v;
 308                         break;
 309                 }
 310         }
 311         if (v2 == (unsigned int)slot)
 312         {
 313                 log(DEBUG,"Item %s already in slot %d!",modulename.c_str(),slot);
 314         }
 315         else if (v2 < 256)
 316         {
 317                 // Swap the module names over
 318                 Config->module_names[v2] = Config->module_names[slot];
 319                 Config->module_names[slot] = modulename;
 320                 // now swap the module factories
 321                 ircd_module* temp = factory[v2];
 322                 factory[v2] = factory[slot];
 323                 factory[slot] = temp;
 324                 // now swap the module objects
 325                 Module* temp_module = modules[v2];
 326                 modules[v2] = modules[slot];
 327                 modules[slot] = temp_module;
 328                 // now swap the implement lists (we dont
 329                 // need to swap the global or recount it)
 330                 for (int n = 0; n < 255; n++)
 331                 {
 332                         char x = Config->implement_lists[v2][n];
 333                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 334                         Config->implement_lists[slot][n] = x;
 335                 }
 336                 log(DEBUG,"Moved %s to slot successfully",modulename.c_str());
 337         }
 338         else
 339         {
 340                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 341         }
 342 }
 343
 344 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 345 {
 346         log(DEBUG,"Move %s after %s...",modulename.c_str(),after.c_str());
 347         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 348         {
 349                 if (Config->module_names[v] == after)
 350                 {
 351                         MoveTo(modulename, v);
 352                         return;
 353                 }
 354         }
 355 }
 356
 357 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 358 {
 359         log(DEBUG,"Move %s before %s...",modulename.c_str(),before.c_str());
 360         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 361         {
 362                 if (Config->module_names[v] == before)
 363                 {
 364                         if (v > 0)
 365                         {
 366                                 MoveTo(modulename, v-1);
 367                         }
 368                         else
 369                         {
 370                                 MoveTo(modulename, v);
 371                         }
 372                         return;
 373                 }
 374         }
 375 }
 376
 377 void InspIRCd::MoveToFirst(std::string modulename)
 378 {
 379         MoveTo(modulename,0);
 380 }
 381
 382 void InspIRCd::MoveToLast(std::string modulename)
 383 {
 384         MoveTo(modulename,MODCOUNT);
 385 }
 386
 387 void InspIRCd::BuildISupport()
 388 {
 389         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 390         std::stringstream v;
 391         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 392         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 393         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 394         Config->data005 = v.str();
 395         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 396 }
 397
 398 bool InspIRCd::UnloadModule(const char* filename)
 399 {
 400         std::string filename_str = filename;
 401         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 402         {
 403                 if (Config->module_names[j] == filename_str)
 404                 {
 405                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 406                         {
 407                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 408                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 409                                 return false;
 410                         }
 411                         /* Give the module a chance to tidy out all its metadata */
 412                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 413                         {
 414                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 415                         }
 416                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 417                         {
 418                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 419                         }
 420
 421                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 422
 423                         for(int t = 0; t < 255; t++)
 424                         {
 425                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 426                         }
 427
 428                         /* We have to renumber implement_lists after unload because the module numbers change!
 429                          */
 430                         for(int j2 = j; j2 < 254; j2++)
 431                         {
 432                                 for(int t = 0; t < 255; t++)
 433                                 {
 434                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 435                                 }
 436                         }
 437
 438                         // found the module
 439                         log(DEBUG,"Deleting module...");
 440                         erase_module(j);
 441                         log(DEBUG,"Erasing module entry...");
 442                         erase_factory(j);
 443                         log(DEBUG,"Removing dependent commands...");
 444                         Parser->RemoveCommands(filename);
 445                         log(DEFAULT,"Module %s unloaded",filename);
 446                         MODCOUNT--;
 447                         BuildISupport();
 448                         return true;
 449                 }
 450         }
 451         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 452         snprintf(MODERR,MAXBUF,"Module not loaded");
 453         return false;
 454 }
 455
 456 bool InspIRCd::LoadModule(const char* filename)
 457 {
 458         char modfile[MAXBUF];
 459 #ifdef STATIC_LINK
 460         strlcpy(modfile,filename,MAXBUF);
 461 #else
 462         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 463 #endif
 464         std::string filename_str = filename;
 465 #ifndef STATIC_LINK
 466 #ifndef IS_CYGWIN
 467         if (!DirValid(modfile))
 468         {
 469                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 470                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 471                 return false;
 472         }
 473 #endif
 474 #endif
 475         log(DEBUG,"Loading module: %s",modfile);
 476 #ifndef STATIC_LINK
 477         if (FileExists(modfile))
 478         {
 479 #endif
 480                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 481                 {
 482                         if (Config->module_names[j] == filename_str)
 483                         {
 484                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 485                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 486                                 return false;
 487                         }
 488                 }
 489                 ircd_module* a = new ircd_module(modfile);
 490                 factory[MODCOUNT+1] = a;
 491                 if (factory[MODCOUNT+1]->LastError())
 492                 {
 493                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 494                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 495                         return false;
 496                 }
 497                 try
 498                 {
 499                         if (factory[MODCOUNT+1]->factory)
 500                         {
 501                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 502                                 modules[MODCOUNT+1] = m;
 503                                 /* save the module and the module's classfactory, if
 504                                  * this isnt done, random crashes can occur :/ */
 505                                 Config->module_names.push_back(filename);
 506
 507                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 508                                 for(int t = 0; t < 255; t++)
 509                                         x[t] = 0;
 510
 511                                 modules[MODCOUNT+1]->Implements(x);
 512
 513                                 for(int t = 0; t < 255; t++)
 514                                 {
 515                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 516                                         if (Config->implement_lists[MODCOUNT+1][t])
 517                                         {
 518                                                 log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 519                                         }
 520                                 }
 521                         }
 522                         else
 523                         {
 524                                 log(DEFAULT,"Unable to load %s",modfile);
 525                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 526                                 return false;
 527                         }
 528                 }
 529                 catch (ModuleException& modexcept)
 530                 {
 531                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 532                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 533                         return false;
 534                 }
 535 #ifndef STATIC_LINK
 536         }
 537         else
 538         {
 539                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 540                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 541                 return false;
 542         }
 543 #endif
 544         MODCOUNT++;
 545         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 546         // now work out which modules, if any, want to move to the back of the queue,
 547         // and if they do, move them there.
 548         std::vector<std::string> put_to_back;
 549         std::vector<std::string> put_to_front;
 550         std::map<std::string,std::string> put_before;
 551         std::map<std::string,std::string> put_after;
 552         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 553         {
 554                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 555                 {
 556                         put_to_back.push_back(Config->module_names[j]);
 557                 }
 558                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 559                 {
 560                         put_to_front.push_back(Config->module_names[j]);
 561                 }
 562                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 563                 {
 564                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 565                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 566                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 567                 }
 568                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 569                 {
 570                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 571                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 572                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 573                 }
 574         }
 575         for (unsigned int j = 0; j < put_to_back.size(); j++)
 576         {
 577                 MoveToLast(put_to_back[j]);
 578         }
 579         for (unsigned int j = 0; j < put_to_front.size(); j++)
 580         {
 581                 MoveToFirst(put_to_front[j]);
 582         }
 583         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 584         {
 585                 MoveBefore(j->first,j->second);
 586         }
 587         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 588         {
 589                 MoveAfter(j->first,j->second);
 590         }
 591         BuildISupport();
 592         return true;
 593 }
 594
 595 void InspIRCd::DoOneIteration(bool process_module_sockets)
 596 {
 597         int activefds[MAX_DESCRIPTORS];
 598         int incomingSockfd;
 599         int in_port;
 600         userrec* cu = NULL;
 601         InspSocket* s = NULL;
 602         InspSocket* s_del = NULL;
 603         unsigned int numberactive;
 604         sockaddr_in sock_us;     // our port number
 605         socklen_t uslen;         // length of our port number
 606
 607         if (yield_depth > 3)
 608                 return;
 609
 610         yield_depth++;
 611
 612         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 613          * Once per loop iteration is pleanty.
 614          */
 615         OLDTIME = TIME;
 616         TIME = time(NULL);
 617
 618         /* Run background module timers every few seconds
 619          * (the docs say modules shouldnt rely on accurate
 620          * timing using this event, so we dont have to
 621          * time this exactly).
 622          */
 623         if (((TIME % 5) == 0) && (!expire_run))
 624         {
 625                 expire_lines();
 626                 if (process_module_sockets)
 627                 {
 628                         /* Fix by brain - the addition of DoOneIteration means that this
 629                          * can end up getting called recursively in the following pattern:
 630                          *
 631                          * m_spanningtree DoPingChecks
 632                          * (server pings out and is squit)
 633                          * (squit causes call to DoOneIteration)
 634                          * DoOneIteration enters here
 635                          * calls DoBackground timer
 636                          * enters m_spanningtree DoPingChecks... see step 1.
 637                          *
 638                          * This should do the job and fix the bug.
 639                          */
 640                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 641                 }
 642                 TickMissedTimers(TIME);
 643                 expire_run = true;
 644                 yield_depth--;
 645                 return;
 646         }
 647         else if ((TIME % 5) == 1)
 648         {
 649                 expire_run = false;
 650         }
 651
 652         if (iterations++ == 15)
 653         {
 654                 iterations = 0;
 655                 DoBackgroundUserStuff(TIME);
 656         }
 657
 658         /* Once a second, do the background processing */
 659         if (TIME != OLDTIME)
 660         {
 661                 if (TIME < OLDTIME)
 662                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 663                 if ((TIME % 3600) == 0)
 664                 {
 665                         MaintainWhoWas(TIME);
 666                 }
 667         }
 668
 669         /* Process timeouts on module sockets each time around
 670          * the loop. There shouldnt be many module sockets, at
 671          * most, 20 or so, so this won't be much of a performance
 672          * hit at all.
 673          */
 674         if (process_module_sockets)
 675                 DoSocketTimeouts(TIME);
 676
 677         TickTimers(TIME);
 678
 679         /* Call the socket engine to wait on the active
 680          * file descriptors. The socket engine has everything's
 681          * descriptors in its list... dns, modules, users,
 682          * servers... so its nice and easy, just one call.
 683          */
 684         if (!(numberactive = SE->Wait(activefds)))
 685         {
 686                 yield_depth--;
 687                 return;
 688         }
 689
 690         /**
 691          * Now process each of the fd's. For users, we have a fast
 692          * lookup table which can find a user by file descriptor, so
 693          * processing them by fd isnt expensive. If we have a lot of
 694          * listening ports or module sockets though, things could get
 695          * ugly.
 696          */
 697         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 698         {
 699                 int socket_type = SE->GetType(activefds[activefd]);
 700                 switch (socket_type)
 701                 {
 702                         case X_ESTAB_CLIENT:
 703
 704                                 cu = fd_ref_table[activefds[activefd]];
 705                                 if (cu)
 706                                         ProcessUser(cu);
 707
 708                         break;
 709
 710                         case X_ESTAB_MODULE:
 711
 712                                 if (!process_module_sockets)
 713                                         break;
 714
 715                                 /* Process module-owned sockets.
 716                                  * Modules are encouraged to inherit their sockets from
 717                                  * InspSocket so we can process them neatly like this.
 718                                  */
 719                                 s = socket_ref[activefds[activefd]];
 720
 721                                 if ((s) && (!s->Poll()))
 722                                 {
 723                                         log(DEBUG,"Socket poll returned false, close and bail");
 724                                         SE->DelFd(s->GetFd());
 725                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 726                                         {
 727                                                 s_del = (InspSocket*)*a;
 728                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 729                                                 {
 730                                                         module_sockets.erase(a);
 731                                                         break;
 732                                                 }
 733                                         }
 734                                         s->Close();
 735                                         delete s;
 736                                 }
 737                         break;
 738
 739                         case X_ESTAB_DNS:
 740                                 /* When we are using single-threaded dns,
 741                                  * the sockets for dns end up in our mainloop.
 742                                  * When we are using multi-threaded dns,
 743                                  * each thread has its own basic poll() loop
 744                                  * within it, making them 'fire and forget'
 745                                  * and independent of the mainloop.
 746                                  */
 747 #ifndef THREADED_DNS
 748                                 dns_poll(activefds[activefd]);
 749 #endif
 750                         break;
 751
 752                         case X_LISTEN:
 753
 754                                 /* It's a listener */
 755                                 uslen = sizeof(sock_us);
 756                                 length = sizeof(client);
 757                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 758
 759                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 760                                 {
 761                                         in_port = ntohs(sock_us.sin_port);
 762                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 763                                         /* Years and years ago, we used to resolve here
 764                                          * using gethostbyaddr(). That is sucky and we
 765                                          * don't do that any more...
 766                                          */
 767                                         NonBlocking(incomingSockfd);
 768                                         if (Config->GetIOHook(in_port))
 769                                         {
 770                                                 try
 771                                                 {
 772                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 773                                                 }
 774                                                 catch (ModuleException& modexcept)
 775                                                 {
 776                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason()); \
 777                                                 }
 778                                         }
 779                                         stats->statsAccept++;
 780                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 781                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 782                                 }
 783                                 else
 784                                 {
 785                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 786                                         shutdown(incomingSockfd,2);
 787                                         close(incomingSockfd);
 788                                         stats->statsRefused++;
 789                                 }
 790                         break;
 791
 792                         default:
 793                                 /* Something went wrong if we're in here.
 794                                  * In fact, so wrong, im not quite sure
 795                                  * what we would do, so for now, its going
 796                                  * to safely do bugger all.
 797                                  */
 798                         break;
 799                 }
 800         }
 801         yield_depth--;
 802 }
 803
 804 int InspIRCd::Run()
 805 {
 806         /* Until THIS point, ServerInstance == NULL */
 807
 808         LoadAllModules(this);
 809
 810         printf("\nInspIRCd is now running!\n");
 811
 812         if (!Config->nofork)
 813         {
 814                 freopen("/dev/null","w",stdout);
 815                 freopen("/dev/null","w",stderr);
 816         }
 817
 818         /* Add the listening sockets used for client inbound connections
 819          * to the socket engine
 820          */
 821         for (int count = 0; count < stats->BoundPortCount; count++)
 822                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 823
 824         WritePID(Config->PID);
 825
 826         /* main loop, this never returns */
 827         expire_run = false;
 828         yield_depth = 0;
 829         iterations = 0;
 830
 831         while (true)
 832         {
 833                 DoOneIteration(true);
 834         }
 835         /* This is never reached -- we hope! */
 836         return 0;
 837 }
 838
 839 /**********************************************************************************/
 840
 841 /**
 842  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 843  */
 844
 845 int main(int argc, char** argv)
 846 {
 847         ServerInstance = new InspIRCd(argc, argv);
 848         ServerInstance->Run();
 849         delete ServerInstance;
 850         return 0;
 851 }
 852