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 int openSockfd[MAXSOCKS];
  74 sockaddr_in client,server;
  75 socklen_t length;
  76
  77 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  78
  79 time_t TIME = time(NULL), OLDTIME = time(NULL);
  80
  81 // This table references users by file descriptor.
  82 // its an array to make it VERY fast, as all lookups are referenced
  83 // by an integer, meaning there is no need for a scan/search operation.
  84 userrec* fd_ref_table[MAX_DESCRIPTORS];
  85
  86 Server* MyServer = new Server;
  87 ServerConfig *Config = new ServerConfig;
  88
  89 user_hash clientlist;
  90 chan_hash chanlist;
  91 whowas_hash whowas;
  92 servernamelist servernames;
  93 char lowermap[255];
  94
  95 void AddServerName(std::string servername)
  96 {
  97         log(DEBUG,"Adding server name: %s",servername.c_str());
  98         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
  99         {
 100                 if (*a == servername)
 101                         return;
 102         }
 103         servernames.push_back(servername);
 104 }
 105
 106 const char* FindServerNamePtr(std::string servername)
 107 {
 108         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 109         {
 110                 if (*a == servername)
 111                         return a->c_str();
 112         }
 113         AddServerName(servername);
 114         return FindServerNamePtr(servername);
 115 }
 116
 117 bool FindServerName(std::string servername)
 118 {
 119         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 120         {
 121                 if (*a == servername)
 122                         return true;
 123         }
 124         return false;
 125 }
 126
 127 std::string InspIRCd::GetRevision()
 128 {
 129         /* w00t got me to replace a bunch of strtok_r
 130          * with something nicer, so i did this. Its the
 131          * same thing really, only in C++. It places the
 132          * text into a std::stringstream which is a readable
 133          * and writeable buffer stream, and then pops two
 134          * words off it, space delimited. Because it reads
 135          * into the same variable twice, the first word
 136          * is discarded, and the second one returned.
 137          */
 138
 139         /* XXX - this revision ID is NOT bumping automatically -- w00t */
 140         std::stringstream Revision("$Revision$");
 141         std::string single;
 142         Revision >> single >> single;
 143         return single;
 144 }
 145
 146 void InspIRCd::MakeLowerMap()
 147 {
 148         // initialize the lowercase mapping table
 149         for (unsigned int cn = 0; cn < 256; cn++)
 150                 lowermap[cn] = cn;
 151         // lowercase the uppercase chars
 152         for (unsigned int cn = 65; cn < 91; cn++)
 153                 lowermap[cn] = tolower(cn);
 154         // now replace the specific chars for scandanavian comparison
 155         lowermap[(unsigned)'['] = '{';
 156         lowermap[(unsigned)']'] = '}';
 157         lowermap[(unsigned)'\\'] = '|';
 158 }
 159
 160 InspIRCd::InspIRCd(int argc, char** argv)
 161 {
 162         Start();
 163         module_sockets.clear();
 164         this->startup_time = time(NULL);
 165         srand(time(NULL));
 166         log(DEBUG,"*** InspIRCd starting up!");
 167         if (!FileExists(CONFIG_FILE))
 168         {
 169                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 170                 log(DEFAULT,"main: no config");
 171                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 172                 Exit(ERROR);
 173         }
 174         if (argc > 1) {
 175                 for (int i = 1; i < argc; i++)
 176                 {
 177                         if (!strcmp(argv[i],"-nofork")) {
 178                                 Config->nofork = true;
 179                         }
 180                         if (!strcmp(argv[i],"-wait")) {
 181                                 sleep(6);
 182                         }
 183                         if (!strcmp(argv[i],"-nolimit")) {
 184                                 Config->unlimitcore = true;
 185                         }
 186                 }
 187         }
 188
 189         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 190
 191         this->MakeLowerMap();
 192
 193         OpenLog(argv, argc);
 194         Config->ClearStack();
 195         Config->Read(true,NULL);
 196         CheckRoot();
 197         this->ModeGrok = new ModeParser();
 198         this->Parser = new CommandParser();
 199         this->stats = new serverstats();
 200         AddServerName(Config->ServerName);
 201         CheckDie();
 202         stats->BoundPortCount = BindPorts();
 203
 204         for(int t = 0; t < 255; t++)
 205                 Config->global_implementation[t] = 0;
 206
 207         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 208
 209         printf("\n");
 210         SetSignals();
 211         if (!Config->nofork)
 212         {
 213                 if (DaemonSeed() == ERROR)
 214                 {
 215                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 216                         Exit(ERROR);
 217                 }
 218         }
 219
 220         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 221          * initialize the socket engine.
 222          */
 223         SE = new SocketEngine();
 224
 225         /* We must load the modules AFTER initializing the socket engine, now */
 226
 227         return;
 228 }
 229
 230 std::string InspIRCd::GetVersionString()
 231 {
 232         char versiondata[MAXBUF];
 233 #ifdef THREADED_DNS
 234         char dnsengine[] = "multithread";
 235 #else
 236         char dnsengine[] = "singlethread";
 237 #endif
 238         if (*Config->CustomVersion)
 239         {
 240                 snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s",VERSION,GetRevision().c_str(),Config->ServerName,Config->CustomVersion);
 241         }
 242         else
 243         {
 244                 snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s [FLAGS=%lu,%s,%s]",VERSION,GetRevision().c_str(),Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 245         }
 246         return versiondata;
 247 }
 248
 249 char* InspIRCd::ModuleError()
 250 {
 251         return MODERR;
 252 }
 253
 254 void InspIRCd::erase_factory(int j)
 255 {
 256         int v = 0;
 257         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 258         {
 259                 if (v == j)
 260                 {
 261                         factory.erase(t);
 262                         factory.push_back(NULL);
 263                         return;
 264                 }
 265                 v++;
 266         }
 267 }
 268
 269 void InspIRCd::erase_module(int j)
 270 {
 271         int v1 = 0;
 272         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 273         {
 274                 if (v1 == j)
 275                 {
 276                         delete *m;
 277                         modules.erase(m);
 278                         modules.push_back(NULL);
 279                         break;
 280                 }
 281                 v1++;
 282         }
 283         int v2 = 0;
 284         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 285         {
 286                 if (v2 == j)
 287                 {
 288                        Config->module_names.erase(v);
 289                        break;
 290                 }
 291                 v2++;
 292         }
 293
 294 }
 295
 296 void InspIRCd::MoveTo(std::string modulename,int slot)
 297 {
 298         unsigned int v2 = 256;
 299         log(DEBUG,"Moving %s to slot %d",modulename.c_str(),slot);
 300         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 301         {
 302                 if (Config->module_names[v] == modulename)
 303                 {
 304                         // found an instance, swap it with the item at MODCOUNT
 305                         v2 = v;
 306                         break;
 307                 }
 308         }
 309         if (v2 == (unsigned int)slot)
 310         {
 311                 log(DEBUG,"Item %s already in slot %d!",modulename.c_str(),slot);
 312         }
 313         else if (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                 log(DEBUG,"Moved %s to slot successfully",modulename.c_str());
 335         }
 336         else
 337         {
 338                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 339         }
 340 }
 341
 342 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 343 {
 344         log(DEBUG,"Move %s after %s...",modulename.c_str(),after.c_str());
 345         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 346         {
 347                 if (Config->module_names[v] == after)
 348                 {
 349                         MoveTo(modulename, v);
 350                         return;
 351                 }
 352         }
 353 }
 354
 355 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 356 {
 357         log(DEBUG,"Move %s before %s...",modulename.c_str(),before.c_str());
 358         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 359         {
 360                 if (Config->module_names[v] == before)
 361                 {
 362                         if (v > 0)
 363                         {
 364                                 MoveTo(modulename, v-1);
 365                         }
 366                         else
 367                         {
 368                                 MoveTo(modulename, v);
 369                         }
 370                         return;
 371                 }
 372         }
 373 }
 374
 375 void InspIRCd::MoveToFirst(std::string modulename)
 376 {
 377         MoveTo(modulename,0);
 378 }
 379
 380 void InspIRCd::MoveToLast(std::string modulename)
 381 {
 382         MoveTo(modulename,MODCOUNT);
 383 }
 384
 385 void InspIRCd::BuildISupport()
 386 {
 387         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 388         std::stringstream v;
 389         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 390         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 391         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network;
 392         Config->data005 = v.str();
 393         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 394 }
 395
 396 bool InspIRCd::UnloadModule(const char* filename)
 397 {
 398         std::string filename_str = filename;
 399         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 400         {
 401                 if (Config->module_names[j] == filename_str)
 402                 {
 403                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 404                         {
 405                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 406                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 407                                 return false;
 408                         }
 409                         /* Give the module a chance to tidy out all its metadata */
 410                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 411                         {
 412                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 413                         }
 414                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 415                         {
 416                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 417                         }
 418
 419                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 420
 421                         for(int t = 0; t < 255; t++)
 422                         {
 423                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 424                         }
 425
 426                         /* We have to renumber implement_lists after unload because the module numbers change!
 427                          */
 428                         for(int j2 = j; j2 < 254; j2++)
 429                         {
 430                                 for(int t = 0; t < 255; t++)
 431                                 {
 432                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 433                                 }
 434                         }
 435
 436                         // found the module
 437                         log(DEBUG,"Deleting module...");
 438                         erase_module(j);
 439                         log(DEBUG,"Erasing module entry...");
 440                         erase_factory(j);
 441                         log(DEBUG,"Removing dependent commands...");
 442                         Parser->RemoveCommands(filename);
 443                         log(DEFAULT,"Module %s unloaded",filename);
 444                         MODCOUNT--;
 445                         BuildISupport();
 446                         return true;
 447                 }
 448         }
 449         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 450         snprintf(MODERR,MAXBUF,"Module not loaded");
 451         return false;
 452 }
 453
 454 bool InspIRCd::LoadModule(const char* filename)
 455 {
 456         char modfile[MAXBUF];
 457 #ifdef STATIC_LINK
 458         strlcpy(modfile,filename,MAXBUF);
 459 #else
 460         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 461 #endif
 462         std::string filename_str = filename;
 463 #ifndef STATIC_LINK
 464 #ifndef IS_CYGWIN
 465         if (!DirValid(modfile))
 466         {
 467                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 468                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 469                 return false;
 470         }
 471 #endif
 472 #endif
 473         log(DEBUG,"Loading module: %s",modfile);
 474 #ifndef STATIC_LINK
 475         if (FileExists(modfile))
 476         {
 477 #endif
 478                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 479                 {
 480                         if (Config->module_names[j] == filename_str)
 481                         {
 482                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 483                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 484                                 return false;
 485                         }
 486                 }
 487                 ircd_module* a = new ircd_module(modfile);
 488                 factory[MODCOUNT+1] = a;
 489                 if (factory[MODCOUNT+1]->LastError())
 490                 {
 491                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 492                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 493                         return false;
 494                 }
 495                 if (factory[MODCOUNT+1]->factory)
 496                 {
 497                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 498                         modules[MODCOUNT+1] = m;
 499                         /* save the module and the module's classfactory, if
 500                          * this isnt done, random crashes can occur :/ */
 501                         Config->module_names.push_back(filename);
 502
 503                         char* x = &Config->implement_lists[MODCOUNT+1][0];
 504                         for(int t = 0; t < 255; t++)
 505                                 x[t] = 0;
 506
 507                         modules[MODCOUNT+1]->Implements(x);
 508
 509                         for(int t = 0; t < 255; t++)
 510                         {
 511                                 Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 512                                 if (Config->implement_lists[MODCOUNT+1][t])
 513                                 {
 514                                         log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 515                                 }
 516                         }
 517                 }
 518                 else
 519                 {
 520                         log(DEFAULT,"Unable to load %s",modfile);
 521                         snprintf(MODERR,MAXBUF,"Factory function failed!");
 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                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 554                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 555                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 556                 }
 557                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 558                 {
 559                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 560                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 561                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 562                 }
 563         }
 564         for (unsigned int j = 0; j < put_to_back.size(); j++)
 565         {
 566                 MoveToLast(put_to_back[j]);
 567         }
 568         for (unsigned int j = 0; j < put_to_front.size(); j++)
 569         {
 570                 MoveToFirst(put_to_front[j]);
 571         }
 572         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 573         {
 574                 MoveBefore(j->first,j->second);
 575         }
 576         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 577         {
 578                 MoveAfter(j->first,j->second);
 579         }
 580         BuildISupport();
 581         return true;
 582 }
 583
 584 int InspIRCd::Run()
 585 {
 586         bool expire_run = false;
 587         int activefds[MAX_DESCRIPTORS];
 588         int incomingSockfd;
 589         int in_port;
 590         userrec* cu = NULL;
 591         InspSocket* s = NULL;
 592         InspSocket* s_del = NULL;
 593         unsigned int numberactive;
 594         sockaddr_in sock_us;     // our port number
 595         socklen_t uslen;         // length of our port number
 596
 597         /* Until THIS point, ServerInstance == NULL */
 598
 599         LoadAllModules(this);
 600
 601         printf("\nInspIRCd is now running!\n");
 602
 603         if (!Config->nofork)
 604         {
 605                 freopen("/dev/null","w",stdout);
 606                 freopen("/dev/null","w",stderr);
 607         }
 608
 609         /* Add the listening sockets used for client inbound connections
 610          * to the socket engine
 611          */
 612         for (int count = 0; count < stats->BoundPortCount; count++)
 613                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 614
 615         WritePID(Config->PID);
 616
 617         /* main loop, this never returns */
 618         for (;;)
 619         {
 620                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 621                  * Once per loop iteration is pleanty.
 622                  */
 623                 OLDTIME = TIME;
 624                 TIME = time(NULL);
 625
 626                 /* Run background module timers every few seconds
 627                  * (the docs say modules shouldnt rely on accurate
 628                  * timing using this event, so we dont have to
 629                  * time this exactly).
 630                  */
 631                 if (((TIME % 8) == 0) && (!expire_run))
 632                 {
 633                         expire_lines();
 634                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 635                         expire_run = true;
 636                         continue;
 637                 }
 638                 else if ((TIME % 8) == 1)
 639                 {
 640                         expire_run = false;
 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                         DoBackgroundUserStuff(TIME);
 649                 }
 650
 651                 /* Process timeouts on module sockets each time around
 652                  * the loop. There shouldnt be many module sockets, at
 653                  * most, 20 or so, so this won't be much of a performance
 654                  * hit at all.
 655                  */
 656                 DoSocketTimeouts(TIME);
 657
 658                 /* Call the socket engine to wait on the active
 659                  * file descriptors. The socket engine has everything's
 660                  * descriptors in its list... dns, modules, users,
 661                  * servers... so its nice and easy, just one call.
 662                  */
 663                 if (!(numberactive = SE->Wait(activefds)))
 664                         continue;
 665
 666                 /**
 667                  * Now process each of the fd's. For users, we have a fast
 668                  * lookup table which can find a user by file descriptor, so
 669                  * processing them by fd isnt expensive. If we have a lot of
 670                  * listening ports or module sockets though, things could get
 671                  * ugly.
 672                  */
 673                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 674                 {
 675                         int socket_type = SE->GetType(activefds[activefd]);
 676                         switch (socket_type)
 677                         {
 678                                 case X_ESTAB_CLIENT:
 679
 680                                         cu = fd_ref_table[activefds[activefd]];
 681                                         if (cu)
 682                                                 ProcessUser(cu);
 683
 684                                 break;
 685
 686                                 case X_ESTAB_MODULE:
 687
 688                                         /* Process module-owned sockets.
 689                                          * Modules are encouraged to inherit their sockets from
 690                                          * InspSocket so we can process them neatly like this.
 691                                          */
 692                                         s = socket_ref[activefds[activefd]];
 693
 694                                         if ((s) && (!s->Poll()))
 695                                         {
 696                                                 log(DEBUG,"Socket poll returned false, close and bail");
 697                                                 SE->DelFd(s->GetFd());
 698                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 699                                                 {
 700                                                         s_del = (InspSocket*)*a;
 701                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 702                                                         {
 703                                                                 module_sockets.erase(a);
 704                                                                 break;
 705                                                         }
 706                                                 }
 707                                                 s->Close();
 708                                                 delete s;
 709                                         }
 710
 711                                 break;
 712
 713                                 case X_ESTAB_DNS:
 714
 715                                         /* When we are using single-threaded dns,
 716                                          * the sockets for dns end up in our mainloop.
 717                                          * When we are using multi-threaded dns,
 718                                          * each thread has its own basic poll() loop
 719                                          * within it, making them 'fire and forget'
 720                                          * and independent of the mainloop.
 721                                          */
 722 #ifndef THREADED_DNS
 723                                         dns_poll(activefds[activefd]);
 724 #endif
 725                                 break;
 726
 727                                 case X_LISTEN:
 728
 729                                         /* It's a listener */
 730                                         uslen = sizeof(sock_us);
 731                                         length = sizeof(client);
 732                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 733
 734                                         if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 735                                         {
 736                                                 in_port = ntohs(sock_us.sin_port);
 737                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
 738                                                 /* Years and years ago, we used to resolve here
 739                                                  * using gethostbyaddr(). That is sucky and we
 740                                                  * don't do that any more...
 741                                                  */
 742                                                 NonBlocking(incomingSockfd);
 743                                                 if (Config->GetIOHook(in_port))
 744                                                 {
 745                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 746                                                 }
 747                                                 stats->statsAccept++;
 748                                                 AddClient(incomingSockfd, in_port, false, client.sin_addr);
 749                                                 log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 750                                         }
 751                                         else
 752                                         {
 753                                                 log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 754                                                 shutdown(incomingSockfd,2);
 755                                                 close(incomingSockfd);
 756                                                 stats->statsRefused++;
 757                                         }
 758                                 break;
 759
 760                                 default:
 761                                         /* Something went wrong if we're in here.
 762                                          * In fact, so wrong, im not quite sure
 763                                          * what we would do, so for now, its going
 764                                          * to safely do bugger all.
 765                                          */
 766                                 break;
 767                         }
 768                 }
 769
 770         }
 771         /* This is never reached -- we hope! */
 772         return 0;
 773 }
 774
 775 /**********************************************************************************/
 776
 777 /**
 778  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 779  */
 780
 781 int main(int argc, char** argv)
 782 {
 783         ServerInstance = new InspIRCd(argc, argv);
 784         ServerInstance->Run();
 785         delete ServerInstance;
 786         return 0;
 787 }
 788