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