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 #include "timer.h"
  61
  62 InspIRCd* ServerInstance;
  63
  64 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  65 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  66
  67 extern std::vector<Module*> modules;
  68 extern std::vector<ircd_module*> factory;
  69
  70 std::vector<InspSocket*> module_sockets;
  71 std::vector<userrec*> local_users;
  72
  73 extern int MODCOUNT;
  74 int openSockfd[MAXSOCKS];
  75 sockaddr_in client,server;
  76 socklen_t length;
  77
  78 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  79
  80 time_t TIME = time(NULL), OLDTIME = time(NULL);
  81
  82 // This table references users by file descriptor.
  83 // its an array to make it VERY fast, as all lookups are referenced
  84 // by an integer, meaning there is no need for a scan/search operation.
  85 userrec* fd_ref_table[MAX_DESCRIPTORS];
  86
  87 Server* MyServer = new Server;
  88 ServerConfig *Config = new ServerConfig;
  89
  90 user_hash clientlist;
  91 chan_hash chanlist;
  92 whowas_hash whowas;
  93 servernamelist servernames;
  94 char lowermap[255];
  95
  96 void AddServerName(std::string servername)
  97 {
  98         log(DEBUG,"Adding server name: %s",servername.c_str());
  99         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 100         {
 101                 if (*a == servername)
 102                         return;
 103         }
 104         servernames.push_back(servername);
 105 }
 106
 107 const char* FindServerNamePtr(std::string servername)
 108 {
 109         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 110         {
 111                 if (*a == servername)
 112                         return a->c_str();
 113         }
 114         AddServerName(servername);
 115         return FindServerNamePtr(servername);
 116 }
 117
 118 bool FindServerName(std::string servername)
 119 {
 120         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 121         {
 122                 if (*a == servername)
 123                         return true;
 124         }
 125         return false;
 126 }
 127
 128 std::string InspIRCd::GetRevision()
 129 {
 130         /* w00t got me to replace a bunch of strtok_r
 131          * with something nicer, so i did this. Its the
 132          * same thing really, only in C++. It places the
 133          * text into a std::stringstream which is a readable
 134          * and writeable buffer stream, and then pops two
 135          * words off it, space delimited. Because it reads
 136          * into the same variable twice, the first word
 137          * is discarded, and the second one returned.
 138          */
 139
 140         /* XXX - this revision ID is NOT bumping automatically -- w00t */
 141         std::stringstream Revision("$Revision$");
 142         std::string single;
 143         Revision >> single >> single;
 144         return single;
 145 }
 146
 147 void InspIRCd::MakeLowerMap()
 148 {
 149         // initialize the lowercase mapping table
 150         for (unsigned int cn = 0; cn < 256; cn++)
 151                 lowermap[cn] = cn;
 152         // lowercase the uppercase chars
 153         for (unsigned int cn = 65; cn < 91; cn++)
 154                 lowermap[cn] = tolower(cn);
 155         // now replace the specific chars for scandanavian comparison
 156         lowermap[(unsigned)'['] = '{';
 157         lowermap[(unsigned)']'] = '}';
 158         lowermap[(unsigned)'\\'] = '|';
 159 }
 160
 161 InspIRCd::InspIRCd(int argc, char** argv)
 162 {
 163         Start();
 164         module_sockets.clear();
 165         this->startup_time = time(NULL);
 166         srand(time(NULL));
 167         log(DEBUG,"*** InspIRCd starting up!");
 168         if (!FileExists(CONFIG_FILE))
 169         {
 170                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 171                 log(DEFAULT,"main: no config");
 172                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 173                 Exit(ERROR);
 174         }
 175         if (argc > 1) {
 176                 for (int i = 1; i < argc; i++)
 177                 {
 178                         if (!strcmp(argv[i],"-nofork")) {
 179                                 Config->nofork = true;
 180                         }
 181                         if (!strcmp(argv[i],"-wait")) {
 182                                 sleep(6);
 183                         }
 184                         if (!strcmp(argv[i],"-nolimit")) {
 185                                 Config->unlimitcore = true;
 186                         }
 187                 }
 188         }
 189
 190         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 191
 192         this->MakeLowerMap();
 193
 194         OpenLog(argv, argc);
 195         Config->ClearStack();
 196         Config->Read(true,NULL);
 197         CheckRoot();
 198         this->ModeGrok = new ModeParser();
 199         this->Parser = new CommandParser();
 200         this->stats = new serverstats();
 201         AddServerName(Config->ServerName);
 202         CheckDie();
 203         stats->BoundPortCount = BindPorts();
 204
 205         for(int t = 0; t < 255; t++)
 206                 Config->global_implementation[t] = 0;
 207
 208         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 209
 210         printf("\n");
 211         SetSignals();
 212         if (!Config->nofork)
 213         {
 214                 if (DaemonSeed() == ERROR)
 215                 {
 216                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 217                         Exit(ERROR);
 218                 }
 219         }
 220
 221         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 222          * initialize the socket engine.
 223          */
 224         SE = new SocketEngine();
 225
 226         /* We must load the modules AFTER initializing the socket engine, now */
 227
 228         return;
 229 }
 230
 231 std::string InspIRCd::GetVersionString()
 232 {
 233         char versiondata[MAXBUF];
 234 #ifdef THREADED_DNS
 235         char dnsengine[] = "multithread";
 236 #else
 237         char dnsengine[] = "singlethread";
 238 #endif
 239         if (*Config->CustomVersion)
 240         {
 241                 snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s",VERSION,GetRevision().c_str(),Config->ServerName,Config->CustomVersion);
 242         }
 243         else
 244         {
 245                 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);
 246         }
 247         return versiondata;
 248 }
 249
 250 char* InspIRCd::ModuleError()
 251 {
 252         return MODERR;
 253 }
 254
 255 void InspIRCd::erase_factory(int j)
 256 {
 257         int v = 0;
 258         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 259         {
 260                 if (v == j)
 261                 {
 262                         factory.erase(t);
 263                         factory.push_back(NULL);
 264                         return;
 265                 }
 266                 v++;
 267         }
 268 }
 269
 270 void InspIRCd::erase_module(int j)
 271 {
 272         int v1 = 0;
 273         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 274         {
 275                 if (v1 == j)
 276                 {
 277                         delete *m;
 278                         modules.erase(m);
 279                         modules.push_back(NULL);
 280                         break;
 281                 }
 282                 v1++;
 283         }
 284         int v2 = 0;
 285         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 286         {
 287                 if (v2 == j)
 288                 {
 289                        Config->module_names.erase(v);
 290                        break;
 291                 }
 292                 v2++;
 293         }
 294
 295 }
 296
 297 void InspIRCd::MoveTo(std::string modulename,int slot)
 298 {
 299         unsigned int v2 = 256;
 300         log(DEBUG,"Moving %s to slot %d",modulename.c_str(),slot);
 301         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 302         {
 303                 if (Config->module_names[v] == modulename)
 304                 {
 305                         // found an instance, swap it with the item at MODCOUNT
 306                         v2 = v;
 307                         break;
 308                 }
 309         }
 310         if (v2 == (unsigned int)slot)
 311         {
 312                 log(DEBUG,"Item %s already in slot %d!",modulename.c_str(),slot);
 313         }
 314         else if (v2 < 256)
 315         {
 316                 // Swap the module names over
 317                 Config->module_names[v2] = Config->module_names[slot];
 318                 Config->module_names[slot] = modulename;
 319                 // now swap the module factories
 320                 ircd_module* temp = factory[v2];
 321                 factory[v2] = factory[slot];
 322                 factory[slot] = temp;
 323                 // now swap the module objects
 324                 Module* temp_module = modules[v2];
 325                 modules[v2] = modules[slot];
 326                 modules[slot] = temp_module;
 327                 // now swap the implement lists (we dont
 328                 // need to swap the global or recount it)
 329                 for (int n = 0; n < 255; n++)
 330                 {
 331                         char x = Config->implement_lists[v2][n];
 332                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 333                         Config->implement_lists[slot][n] = x;
 334                 }
 335                 log(DEBUG,"Moved %s to slot successfully",modulename.c_str());
 336         }
 337         else
 338         {
 339                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 340         }
 341 }
 342
 343 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 344 {
 345         log(DEBUG,"Move %s after %s...",modulename.c_str(),after.c_str());
 346         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 347         {
 348                 if (Config->module_names[v] == after)
 349                 {
 350                         MoveTo(modulename, v);
 351                         return;
 352                 }
 353         }
 354 }
 355
 356 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 357 {
 358         log(DEBUG,"Move %s before %s...",modulename.c_str(),before.c_str());
 359         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 360         {
 361                 if (Config->module_names[v] == before)
 362                 {
 363                         if (v > 0)
 364                         {
 365                                 MoveTo(modulename, v-1);
 366                         }
 367                         else
 368                         {
 369                                 MoveTo(modulename, v);
 370                         }
 371                         return;
 372                 }
 373         }
 374 }
 375
 376 void InspIRCd::MoveToFirst(std::string modulename)
 377 {
 378         MoveTo(modulename,0);
 379 }
 380
 381 void InspIRCd::MoveToLast(std::string modulename)
 382 {
 383         MoveTo(modulename,MODCOUNT);
 384 }
 385
 386 void InspIRCd::BuildISupport()
 387 {
 388         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 389         std::stringstream v;
 390         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 391         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 392         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 393         Config->data005 = v.str();
 394         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 395 }
 396
 397 bool InspIRCd::UnloadModule(const char* filename)
 398 {
 399         std::string filename_str = filename;
 400         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 401         {
 402                 if (Config->module_names[j] == filename_str)
 403                 {
 404                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 405                         {
 406                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 407                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 408                                 return false;
 409                         }
 410                         /* Give the module a chance to tidy out all its metadata */
 411                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 412                         {
 413                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 414                         }
 415                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 416                         {
 417                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 418                         }
 419
 420                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 421
 422                         for(int t = 0; t < 255; t++)
 423                         {
 424                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 425                         }
 426
 427                         /* We have to renumber implement_lists after unload because the module numbers change!
 428                          */
 429                         for(int j2 = j; j2 < 254; j2++)
 430                         {
 431                                 for(int t = 0; t < 255; t++)
 432                                 {
 433                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 434                                 }
 435                         }
 436
 437                         // found the module
 438                         log(DEBUG,"Deleting module...");
 439                         erase_module(j);
 440                         log(DEBUG,"Erasing module entry...");
 441                         erase_factory(j);
 442                         log(DEBUG,"Removing dependent commands...");
 443                         Parser->RemoveCommands(filename);
 444                         log(DEFAULT,"Module %s unloaded",filename);
 445                         MODCOUNT--;
 446                         BuildISupport();
 447                         return true;
 448                 }
 449         }
 450         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 451         snprintf(MODERR,MAXBUF,"Module not loaded");
 452         return false;
 453 }
 454
 455 bool InspIRCd::LoadModule(const char* filename)
 456 {
 457         char modfile[MAXBUF];
 458 #ifdef STATIC_LINK
 459         strlcpy(modfile,filename,MAXBUF);
 460 #else
 461         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 462 #endif
 463         std::string filename_str = filename;
 464 #ifndef STATIC_LINK
 465 #ifndef IS_CYGWIN
 466         if (!DirValid(modfile))
 467         {
 468                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 469                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 470                 return false;
 471         }
 472 #endif
 473 #endif
 474         log(DEBUG,"Loading module: %s",modfile);
 475 #ifndef STATIC_LINK
 476         if (FileExists(modfile))
 477         {
 478 #endif
 479                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 480                 {
 481                         if (Config->module_names[j] == filename_str)
 482                         {
 483                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 484                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 485                                 return false;
 486                         }
 487                 }
 488                 ircd_module* a = new ircd_module(modfile);
 489                 factory[MODCOUNT+1] = a;
 490                 if (factory[MODCOUNT+1]->LastError())
 491                 {
 492                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 493                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 494                         return false;
 495                 }
 496                 try
 497                 {
 498                         if (factory[MODCOUNT+1]->factory)
 499                         {
 500                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 501                                 modules[MODCOUNT+1] = m;
 502                                 /* save the module and the module's classfactory, if
 503                                  * this isnt done, random crashes can occur :/ */
 504                                 Config->module_names.push_back(filename);
 505
 506                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 507                                 for(int t = 0; t < 255; t++)
 508                                         x[t] = 0;
 509
 510                                 modules[MODCOUNT+1]->Implements(x);
 511
 512                                 for(int t = 0; t < 255; t++)
 513                                 {
 514                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 515                                         if (Config->implement_lists[MODCOUNT+1][t])
 516                                         {
 517                                                 log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 518                                         }
 519                                 }
 520                         }
 521                         else
 522                         {
 523                                 log(DEFAULT,"Unable to load %s",modfile);
 524                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 525                                 return false;
 526                         }
 527                 }
 528                 catch (ModuleException& modexcept)
 529                 {
 530                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 531                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 532                         return false;
 533                 }
 534 #ifndef STATIC_LINK
 535         }
 536         else
 537         {
 538                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 539                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 540                 return false;
 541         }
 542 #endif
 543         MODCOUNT++;
 544         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 545         // now work out which modules, if any, want to move to the back of the queue,
 546         // and if they do, move them there.
 547         std::vector<std::string> put_to_back;
 548         std::vector<std::string> put_to_front;
 549         std::map<std::string,std::string> put_before;
 550         std::map<std::string,std::string> put_after;
 551         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 552         {
 553                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 554                 {
 555                         put_to_back.push_back(Config->module_names[j]);
 556                 }
 557                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 558                 {
 559                         put_to_front.push_back(Config->module_names[j]);
 560                 }
 561                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 562                 {
 563                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 564                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 565                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 566                 }
 567                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 568                 {
 569                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 570                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 571                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 572                 }
 573         }
 574         for (unsigned int j = 0; j < put_to_back.size(); j++)
 575         {
 576                 MoveToLast(put_to_back[j]);
 577         }
 578         for (unsigned int j = 0; j < put_to_front.size(); j++)
 579         {
 580                 MoveToFirst(put_to_front[j]);
 581         }
 582         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 583         {
 584                 MoveBefore(j->first,j->second);
 585         }
 586         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 587         {
 588                 MoveAfter(j->first,j->second);
 589         }
 590         BuildISupport();
 591         return true;
 592 }
 593
 594 int InspIRCd::Run()
 595 {
 596         bool expire_run = false;
 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         /* Until THIS point, ServerInstance == NULL */
 608
 609         LoadAllModules(this);
 610
 611         printf("\nInspIRCd is now running!\n");
 612
 613         if (!Config->nofork)
 614         {
 615                 freopen("/dev/null","w",stdout);
 616                 freopen("/dev/null","w",stderr);
 617         }
 618
 619         /* Add the listening sockets used for client inbound connections
 620          * to the socket engine
 621          */
 622         for (int count = 0; count < stats->BoundPortCount; count++)
 623                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 624
 625         WritePID(Config->PID);
 626
 627         /* main loop, this never returns */
 628         for (;;)
 629         {
 630                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 631                  * Once per loop iteration is pleanty.
 632                  */
 633                 OLDTIME = TIME;
 634                 TIME = time(NULL);
 635
 636                 /* Run background module timers every few seconds
 637                  * (the docs say modules shouldnt rely on accurate
 638                  * timing using this event, so we dont have to
 639                  * time this exactly).
 640                  */
 641                 if (((TIME % 5) == 0) && (!expire_run))
 642                 {
 643                         expire_lines();
 644                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 645                         expire_run = true;
 646                         continue;
 647                 }
 648                 else if ((TIME % 5) == 1)
 649                 {
 650                         expire_run = false;
 651                 }
 652
 653                 /* Once a second, do the background processing */
 654                 if (TIME != OLDTIME)
 655                 {
 656                         if (TIME < OLDTIME)
 657                                 WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 658                         DoBackgroundUserStuff(TIME);
 659
 660                         /*
 661                          * Trigger all InspTimers that are pending
 662                          */
 663                         TickTimers(TIME);
 664                 }
 665
 666                 /* Process timeouts on module sockets each time around
 667                  * the loop. There shouldnt be many module sockets, at
 668                  * most, 20 or so, so this won't be much of a performance
 669                  * hit at all.
 670                  */
 671                 DoSocketTimeouts(TIME);
 672
 673                 /* Call the socket engine to wait on the active
 674                  * file descriptors. The socket engine has everything's
 675                  * descriptors in its list... dns, modules, users,
 676                  * servers... so its nice and easy, just one call.
 677                  */
 678                 if (!(numberactive = SE->Wait(activefds)))
 679                         continue;
 680
 681                 /**
 682                  * Now process each of the fd's. For users, we have a fast
 683                  * lookup table which can find a user by file descriptor, so
 684                  * processing them by fd isnt expensive. If we have a lot of
 685                  * listening ports or module sockets though, things could get
 686                  * ugly.
 687                  */
 688                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 689                 {
 690                         int socket_type = SE->GetType(activefds[activefd]);
 691                         switch (socket_type)
 692                         {
 693                                 case X_ESTAB_CLIENT:
 694
 695                                         cu = fd_ref_table[activefds[activefd]];
 696                                         if (cu)
 697                                                 ProcessUser(cu);
 698
 699                                 break;
 700
 701                                 case X_ESTAB_MODULE:
 702
 703                                         /* Process module-owned sockets.
 704                                          * Modules are encouraged to inherit their sockets from
 705                                          * InspSocket so we can process them neatly like this.
 706                                          */
 707                                         s = socket_ref[activefds[activefd]];
 708
 709                                         if ((s) && (!s->Poll()))
 710                                         {
 711                                                 log(DEBUG,"Socket poll returned false, close and bail");
 712                                                 SE->DelFd(s->GetFd());
 713                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 714                                                 {
 715                                                         s_del = (InspSocket*)*a;
 716                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 717                                                         {
 718                                                                 module_sockets.erase(a);
 719                                                                 break;
 720                                                         }
 721                                                 }
 722                                                 s->Close();
 723                                                 delete s;
 724                                         }
 725
 726                                 break;
 727
 728                                 case X_ESTAB_DNS:
 729
 730                                         /* When we are using single-threaded dns,
 731                                          * the sockets for dns end up in our mainloop.
 732                                          * When we are using multi-threaded dns,
 733                                          * each thread has its own basic poll() loop
 734                                          * within it, making them 'fire and forget'
 735                                          * and independent of the mainloop.
 736                                          */
 737 #ifndef THREADED_DNS
 738                                         dns_poll(activefds[activefd]);
 739 #endif
 740                                 break;
 741
 742                                 case X_LISTEN:
 743
 744                                         /* It's a listener */
 745                                         uslen = sizeof(sock_us);
 746                                         length = sizeof(client);
 747                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 748
 749                                         if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 750                                         {
 751                                                 in_port = ntohs(sock_us.sin_port);
 752                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
 753                                                 /* Years and years ago, we used to resolve here
 754                                                  * using gethostbyaddr(). That is sucky and we
 755                                                  * don't do that any more...
 756                                                  */
 757                                                 NonBlocking(incomingSockfd);
 758                                                 if (Config->GetIOHook(in_port))
 759                                                 {
 760                                                         try
 761                                                         {
 762                                                                 Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 763                                                         }
 764                                                         catch (ModuleException& modexcept)
 765                                                         {
 766                                                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason()); \
 767                                                         }
 768                                                 }
 769                                                 stats->statsAccept++;
 770                                                 AddClient(incomingSockfd, in_port, false, client.sin_addr);
 771                                                 log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 772                                         }
 773                                         else
 774                                         {
 775                                                 log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 776                                                 shutdown(incomingSockfd,2);
 777                                                 close(incomingSockfd);
 778                                                 stats->statsRefused++;
 779                                         }
 780                                 break;
 781
 782                                 default:
 783                                         /* Something went wrong if we're in here.
 784                                          * In fact, so wrong, im not quite sure
 785                                          * what we would do, so for now, its going
 786                                          * to safely do bugger all.
 787                                          */
 788                                 break;
 789                         }
 790                 }
 791
 792         }
 793         /* This is never reached -- we hope! */
 794         return 0;
 795 }
 796
 797 /**********************************************************************************/
 798
 799 /**
 800  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 801  */
 802
 803 int main(int argc, char** argv)
 804 {
 805         ServerInstance = new InspIRCd(argc, argv);
 806         ServerInstance->Run();
 807         delete ServerInstance;
 808         return 0;
 809 }
 810