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 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 << " MAXPARA=32";
 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                 try
 496                 {
 497                         if (factory[MODCOUNT+1]->factory)
 498                         {
 499                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 500                                 modules[MODCOUNT+1] = m;
 501                                 /* save the module and the module's classfactory, if
 502                                  * this isnt done, random crashes can occur :/ */
 503                                 Config->module_names.push_back(filename);
 504
 505                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 506                                 for(int t = 0; t < 255; t++)
 507                                         x[t] = 0;
 508
 509                                 modules[MODCOUNT+1]->Implements(x);
 510
 511                                 for(int t = 0; t < 255; t++)
 512                                 {
 513                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 514                                         if (Config->implement_lists[MODCOUNT+1][t])
 515                                         {
 516                                                 log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 517                                         }
 518                                 }
 519                         }
 520                         else
 521                         {
 522                                 log(DEFAULT,"Unable to load %s",modfile);
 523                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 524                                 return false;
 525                         }
 526                 }
 527                 catch (ModuleException& modexcept)
 528                 {
 529                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 530                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 531                         return false;
 532                 }
 533 #ifndef STATIC_LINK
 534         }
 535         else
 536         {
 537                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 538                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 539                 return false;
 540         }
 541 #endif
 542         MODCOUNT++;
 543         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 544         // now work out which modules, if any, want to move to the back of the queue,
 545         // and if they do, move them there.
 546         std::vector<std::string> put_to_back;
 547         std::vector<std::string> put_to_front;
 548         std::map<std::string,std::string> put_before;
 549         std::map<std::string,std::string> put_after;
 550         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 551         {
 552                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 553                 {
 554                         put_to_back.push_back(Config->module_names[j]);
 555                 }
 556                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 557                 {
 558                         put_to_front.push_back(Config->module_names[j]);
 559                 }
 560                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 561                 {
 562                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 563                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 564                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 565                 }
 566                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 567                 {
 568                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 569                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 570                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 571                 }
 572         }
 573         for (unsigned int j = 0; j < put_to_back.size(); j++)
 574         {
 575                 MoveToLast(put_to_back[j]);
 576         }
 577         for (unsigned int j = 0; j < put_to_front.size(); j++)
 578         {
 579                 MoveToFirst(put_to_front[j]);
 580         }
 581         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 582         {
 583                 MoveBefore(j->first,j->second);
 584         }
 585         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 586         {
 587                 MoveAfter(j->first,j->second);
 588         }
 589         BuildISupport();
 590         return true;
 591 }
 592
 593 int InspIRCd::Run()
 594 {
 595         bool expire_run = false;
 596         int activefds[MAX_DESCRIPTORS];
 597         int incomingSockfd;
 598         int in_port;
 599         userrec* cu = NULL;
 600         InspSocket* s = NULL;
 601         InspSocket* s_del = NULL;
 602         unsigned int numberactive;
 603         sockaddr_in sock_us;     // our port number
 604         socklen_t uslen;         // length of our port number
 605
 606         /* Until THIS point, ServerInstance == NULL */
 607
 608         LoadAllModules(this);
 609
 610         printf("\nInspIRCd is now running!\n");
 611
 612         if (!Config->nofork)
 613         {
 614                 freopen("/dev/null","w",stdout);
 615                 freopen("/dev/null","w",stderr);
 616         }
 617
 618         /* Add the listening sockets used for client inbound connections
 619          * to the socket engine
 620          */
 621         for (int count = 0; count < stats->BoundPortCount; count++)
 622                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 623
 624         WritePID(Config->PID);
 625
 626         /* main loop, this never returns */
 627         for (;;)
 628         {
 629                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 630                  * Once per loop iteration is pleanty.
 631                  */
 632                 OLDTIME = TIME;
 633                 TIME = time(NULL);
 634
 635                 /* Run background module timers every few seconds
 636                  * (the docs say modules shouldnt rely on accurate
 637                  * timing using this event, so we dont have to
 638                  * time this exactly).
 639                  */
 640                 if (((TIME % 5) == 0) && (!expire_run))
 641                 {
 642                         expire_lines();
 643                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 644                         expire_run = true;
 645                         continue;
 646                 }
 647                 else if ((TIME % 5) == 1)
 648                 {
 649                         expire_run = false;
 650                 }
 651
 652                 /* Once a second, do the background processing */
 653                 if (TIME != OLDTIME)
 654                 {
 655                         if (TIME < OLDTIME)
 656                                 WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 657                         DoBackgroundUserStuff(TIME);
 658                 }
 659
 660                 /* Process timeouts on module sockets each time around
 661                  * the loop. There shouldnt be many module sockets, at
 662                  * most, 20 or so, so this won't be much of a performance
 663                  * hit at all.
 664                  */
 665                 DoSocketTimeouts(TIME);
 666
 667                 /* Call the socket engine to wait on the active
 668                  * file descriptors. The socket engine has everything's
 669                  * descriptors in its list... dns, modules, users,
 670                  * servers... so its nice and easy, just one call.
 671                  */
 672                 if (!(numberactive = SE->Wait(activefds)))
 673                         continue;
 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                                         /* Process module-owned sockets.
 698                                          * Modules are encouraged to inherit their sockets from
 699                                          * InspSocket so we can process them neatly like this.
 700                                          */
 701                                         s = socket_ref[activefds[activefd]];
 702
 703                                         if ((s) && (!s->Poll()))
 704                                         {
 705                                                 log(DEBUG,"Socket poll returned false, close and bail");
 706                                                 SE->DelFd(s->GetFd());
 707                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 708                                                 {
 709                                                         s_del = (InspSocket*)*a;
 710                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 711                                                         {
 712                                                                 module_sockets.erase(a);
 713                                                                 break;
 714                                                         }
 715                                                 }
 716                                                 s->Close();
 717                                                 delete s;
 718                                         }
 719
 720                                 break;
 721
 722                                 case X_ESTAB_DNS:
 723
 724                                         /* When we are using single-threaded dns,
 725                                          * the sockets for dns end up in our mainloop.
 726                                          * When we are using multi-threaded dns,
 727                                          * each thread has its own basic poll() loop
 728                                          * within it, making them 'fire and forget'
 729                                          * and independent of the mainloop.
 730                                          */
 731 #ifndef THREADED_DNS
 732                                         dns_poll(activefds[activefd]);
 733 #endif
 734                                 break;
 735
 736                                 case X_LISTEN:
 737
 738                                         /* It's a listener */
 739                                         uslen = sizeof(sock_us);
 740                                         length = sizeof(client);
 741                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 742
 743                                         if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 744                                         {
 745                                                 in_port = ntohs(sock_us.sin_port);
 746                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
 747                                                 /* Years and years ago, we used to resolve here
 748                                                  * using gethostbyaddr(). That is sucky and we
 749                                                  * don't do that any more...
 750                                                  */
 751                                                 NonBlocking(incomingSockfd);
 752                                                 if (Config->GetIOHook(in_port))
 753                                                 {
 754                                                         try
 755                                                         {
 756                                                                 Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 757                                                         }
 758                                                         catch (ModuleException& modexcept)
 759                                                         {
 760                                                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason()); \
 761                                                         }
 762                                                 }
 763                                                 stats->statsAccept++;
 764                                                 AddClient(incomingSockfd, in_port, false, client.sin_addr);
 765                                                 log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 766                                         }
 767                                         else
 768                                         {
 769                                                 log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 770                                                 shutdown(incomingSockfd,2);
 771                                                 close(incomingSockfd);
 772                                                 stats->statsRefused++;
 773                                         }
 774                                 break;
 775
 776                                 default:
 777                                         /* Something went wrong if we're in here.
 778                                          * In fact, so wrong, im not quite sure
 779                                          * what we would do, so for now, its going
 780                                          * to safely do bugger all.
 781                                          */
 782                                 break;
 783                         }
 784                 }
 785
 786         }
 787         /* This is never reached -- we hope! */
 788         return 0;
 789 }
 790
 791 /**********************************************************************************/
 792
 793 /**
 794  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 795  */
 796
 797 int main(int argc, char** argv)
 798 {
 799         ServerInstance = new InspIRCd(argc, argv);
 800         ServerInstance->Run();
 801         delete ServerInstance;
 802         return 0;
 803 }
 804