src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include <fcntl.h>
  25 #include <sys/errno.h>
  26 #include <sys/ioctl.h>
  27 #include <time.h>
  28 #include <string>
  29 #ifdef GCC3
  30 #include <ext/hash_map>
  31 #else
  32 #include <hash_map>
  33 #endif
  34 #include <map>
  35 #include <sstream>
  36 #include <vector>
  37 #include <deque>
  38 #ifdef THREADED_DNS
  39 #include <pthread.h>
  40 #endif
  41 #include "users.h"
  42 #include "ctables.h"
  43 #include "globals.h"
  44 #include "modules.h"
  45 #include "dynamic.h"
  46 #include "wildcard.h"
  47 #include "message.h"
  48 #include "mode.h"
  49 #include "commands.h"
  50 #include "xline.h"
  51 #include "inspstring.h"
  52 #include "dnsqueue.h"
  53 #include "helperfuncs.h"
  54 #include "hashcomp.h"
  55 #include "socketengine.h"
  56 #include "userprocess.h"
  57 #include "socket.h"
  58 #include "typedefs.h"
  59 #include "command_parse.h"
  60
  61 InspIRCd* ServerInstance;
  62
  63 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  64 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  65
  66 extern std::vector<Module*> modules;
  67 extern std::vector<ircd_module*> factory;
  68
  69 std::vector<InspSocket*> module_sockets;
  70 std::vector<userrec*> local_users;
  71
  72 extern int MODCOUNT;
  73 extern char LOG_FILE[MAXBUF];
  74 int openSockfd[MAXSOCKS];
  75 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         *LOG_FILE = 0;
 176         if (argc > 1) {
 177                 for (int i = 1; i < argc; i++)
 178                 {
 179                         if (!strcmp(argv[i],"-nofork")) {
 180                                 Config->nofork = true;
 181                         }
 182                         if (!strcmp(argv[i],"-wait")) {
 183                                 sleep(6);
 184                         }
 185                         if (!strcmp(argv[i],"-nolimit")) {
 186                                 Config->unlimitcore = true;
 187                         }
 188                         if (!strcmp(argv[i],"-logfile")) {
 189                                 if (argc > i+1)
 190                                 {
 191                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 192                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 193                                 }
 194                                 else
 195                                 {
 196                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 197                                         Exit(ERROR);
 198                                 }
 199                         }
 200                 }
 201         }
 202
 203         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 204
 205         this->MakeLowerMap();
 206
 207         OpenLog(argv, argc);
 208         Config->ClearStack();
 209         Config->Read(true,NULL);
 210         CheckRoot();
 211         this->ModeGrok = new ModeParser();
 212         this->Parser = new CommandParser();
 213         this->stats = new serverstats();
 214         AddServerName(Config->ServerName);
 215         CheckDie();
 216         stats->BoundPortCount = BindPorts();
 217
 218         for(int t = 0; t < 255; t++)
 219                 Config->global_implementation[t] = 0;
 220
 221         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 222
 223         printf("\n");
 224         SetSignals();
 225         if (!Config->nofork)
 226         {
 227                 if (DaemonSeed() == ERROR)
 228                 {
 229                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 230                         Exit(ERROR);
 231                 }
 232         }
 233
 234         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 235          * initialize the socket engine.
 236          */
 237         SE = new SocketEngine();
 238
 239         /* We must load the modules AFTER initializing the socket engine, now */
 240
 241         return;
 242 }
 243
 244 std::string InspIRCd::GetVersionString()
 245 {
 246         char versiondata[MAXBUF];
 247 #ifdef THREADED_DNS
 248         char dnsengine[] = "multithread";
 249 #else
 250         char dnsengine[] = "singlethread";
 251 #endif
 252         if (*Config->CustomVersion)
 253         {
 254                 snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s",VERSION,GetRevision().c_str(),Config->ServerName,Config->CustomVersion);
 255         }
 256         else
 257         {
 258                 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);
 259         }
 260         return versiondata;
 261 }
 262
 263 char* InspIRCd::ModuleError()
 264 {
 265         return MODERR;
 266 }
 267
 268 void InspIRCd::erase_factory(int j)
 269 {
 270         int v = 0;
 271         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 272         {
 273                 if (v == j)
 274                 {
 275                         factory.erase(t);
 276                         factory.push_back(NULL);
 277                         return;
 278                 }
 279                 v++;
 280         }
 281 }
 282
 283 void InspIRCd::erase_module(int j)
 284 {
 285         int v1 = 0;
 286         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 287         {
 288                 if (v1 == j)
 289                 {
 290                         delete *m;
 291                         modules.erase(m);
 292                         modules.push_back(NULL);
 293                         break;
 294                 }
 295                 v1++;
 296         }
 297         int v2 = 0;
 298         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 299         {
 300                 if (v2 == j)
 301                 {
 302                        Config->module_names.erase(v);
 303                        break;
 304                 }
 305                 v2++;
 306         }
 307
 308 }
 309
 310 void InspIRCd::MoveTo(std::string modulename,int slot)
 311 {
 312         unsigned int v2 = 256;
 313         log(DEBUG,"Moving %s to slot %d",modulename.c_str(),slot);
 314         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 315         {
 316                 if (Config->module_names[v] == modulename)
 317                 {
 318                         // found an instance, swap it with the item at MODCOUNT
 319                         v2 = v;
 320                         break;
 321                 }
 322         }
 323         if (v2 == (unsigned int)slot)
 324         {
 325                 log(DEBUG,"Item %s already in slot %d!",modulename.c_str(),slot);
 326         }
 327         else if (v2 < 256)
 328         {
 329                 // Swap the module names over
 330                 Config->module_names[v2] = Config->module_names[slot];
 331                 Config->module_names[slot] = modulename;
 332                 // now swap the module factories
 333                 ircd_module* temp = factory[v2];
 334                 factory[v2] = factory[slot];
 335                 factory[slot] = temp;
 336                 // now swap the module objects
 337                 Module* temp_module = modules[v2];
 338                 modules[v2] = modules[slot];
 339                 modules[slot] = temp_module;
 340                 // now swap the implement lists (we dont
 341                 // need to swap the global or recount it)
 342                 for (int n = 0; n < 255; n++)
 343                 {
 344                         char x = Config->implement_lists[v2][n];
 345                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 346                         Config->implement_lists[slot][n] = x;
 347                 }
 348                 log(DEBUG,"Moved %s to slot successfully",modulename.c_str());
 349         }
 350         else
 351         {
 352                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 353         }
 354 }
 355
 356 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 357 {
 358         log(DEBUG,"Move %s after %s...",modulename.c_str(),after.c_str());
 359         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 360         {
 361                 if (Config->module_names[v] == after)
 362                 {
 363                         MoveTo(modulename, v);
 364                         return;
 365                 }
 366         }
 367 }
 368
 369 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 370 {
 371         log(DEBUG,"Move %s before %s...",modulename.c_str(),before.c_str());
 372         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 373         {
 374                 if (Config->module_names[v] == before)
 375                 {
 376                         if (v > 0)
 377                         {
 378                                 MoveTo(modulename, v-1);
 379                         }
 380                         else
 381                         {
 382                                 MoveTo(modulename, v);
 383                         }
 384                         return;
 385                 }
 386         }
 387 }
 388
 389 void InspIRCd::MoveToFirst(std::string modulename)
 390 {
 391         MoveTo(modulename,0);
 392 }
 393
 394 void InspIRCd::MoveToLast(std::string modulename)
 395 {
 396         MoveTo(modulename,MODCOUNT);
 397 }
 398
 399 void InspIRCd::BuildISupport()
 400 {
 401         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 402         std::stringstream v;
 403         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 404         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 405         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 406         Config->data005 = v.str();
 407         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 408 }
 409
 410 bool InspIRCd::UnloadModule(const char* filename)
 411 {
 412         std::string filename_str = filename;
 413         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 414         {
 415                 if (Config->module_names[j] == filename_str)
 416                 {
 417                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 418                         {
 419                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 420                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 421                                 return false;
 422                         }
 423                         /* Give the module a chance to tidy out all its metadata */
 424                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 425                         {
 426                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 427                         }
 428                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 429                         {
 430                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 431                         }
 432
 433                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 434
 435                         for(int t = 0; t < 255; t++)
 436                         {
 437                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 438                         }
 439
 440                         /* We have to renumber implement_lists after unload because the module numbers change!
 441                          */
 442                         for(int j2 = j; j2 < 254; j2++)
 443                         {
 444                                 for(int t = 0; t < 255; t++)
 445                                 {
 446                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 447                                 }
 448                         }
 449
 450                         // found the module
 451                         log(DEBUG,"Deleting module...");
 452                         erase_module(j);
 453                         log(DEBUG,"Erasing module entry...");
 454                         erase_factory(j);
 455                         log(DEBUG,"Removing dependent commands...");
 456                         Parser->RemoveCommands(filename);
 457                         log(DEFAULT,"Module %s unloaded",filename);
 458                         MODCOUNT--;
 459                         BuildISupport();
 460                         return true;
 461                 }
 462         }
 463         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 464         snprintf(MODERR,MAXBUF,"Module not loaded");
 465         return false;
 466 }
 467
 468 bool InspIRCd::LoadModule(const char* filename)
 469 {
 470         char modfile[MAXBUF];
 471 #ifdef STATIC_LINK
 472         strlcpy(modfile,filename,MAXBUF);
 473 #else
 474         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 475 #endif
 476         std::string filename_str = filename;
 477 #ifndef STATIC_LINK
 478 #ifndef IS_CYGWIN
 479         if (!DirValid(modfile))
 480         {
 481                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 482                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 483                 return false;
 484         }
 485 #endif
 486 #endif
 487         log(DEBUG,"Loading module: %s",modfile);
 488 #ifndef STATIC_LINK
 489         if (FileExists(modfile))
 490         {
 491 #endif
 492                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 493                 {
 494                         if (Config->module_names[j] == filename_str)
 495                         {
 496                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 497                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 498                                 return false;
 499                         }
 500                 }
 501                 ircd_module* a = new ircd_module(modfile);
 502                 factory[MODCOUNT+1] = a;
 503                 if (factory[MODCOUNT+1]->LastError())
 504                 {
 505                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 506                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 507                         return false;
 508                 }
 509                 try
 510                 {
 511                         if (factory[MODCOUNT+1]->factory)
 512                         {
 513                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 514                                 modules[MODCOUNT+1] = m;
 515                                 /* save the module and the module's classfactory, if
 516                                  * this isnt done, random crashes can occur :/ */
 517                                 Config->module_names.push_back(filename);
 518
 519                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 520                                 for(int t = 0; t < 255; t++)
 521                                         x[t] = 0;
 522
 523                                 modules[MODCOUNT+1]->Implements(x);
 524
 525                                 for(int t = 0; t < 255; t++)
 526                                 {
 527                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 528                                         if (Config->implement_lists[MODCOUNT+1][t])
 529                                         {
 530                                                 log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 531                                         }
 532                                 }
 533                         }
 534                         else
 535                         {
 536                                 log(DEFAULT,"Unable to load %s",modfile);
 537                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 538                                 return false;
 539                         }
 540                 }
 541                 catch (ModuleException& modexcept)
 542                 {
 543                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 544                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 545                         return false;
 546                 }
 547 #ifndef STATIC_LINK
 548         }
 549         else
 550         {
 551                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 552                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 553                 return false;
 554         }
 555 #endif
 556         MODCOUNT++;
 557         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 558         // now work out which modules, if any, want to move to the back of the queue,
 559         // and if they do, move them there.
 560         std::vector<std::string> put_to_back;
 561         std::vector<std::string> put_to_front;
 562         std::map<std::string,std::string> put_before;
 563         std::map<std::string,std::string> put_after;
 564         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 565         {
 566                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 567                 {
 568                         put_to_back.push_back(Config->module_names[j]);
 569                 }
 570                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 571                 {
 572                         put_to_front.push_back(Config->module_names[j]);
 573                 }
 574                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 575                 {
 576                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 577                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 578                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 579                 }
 580                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 581                 {
 582                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 583                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 584                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 585                 }
 586         }
 587         for (unsigned int j = 0; j < put_to_back.size(); j++)
 588         {
 589                 MoveToLast(put_to_back[j]);
 590         }
 591         for (unsigned int j = 0; j < put_to_front.size(); j++)
 592         {
 593                 MoveToFirst(put_to_front[j]);
 594         }
 595         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 596         {
 597                 MoveBefore(j->first,j->second);
 598         }
 599         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 600         {
 601                 MoveAfter(j->first,j->second);
 602         }
 603         BuildISupport();
 604         return true;
 605 }
 606
 607 void InspIRCd::DoOneIteration(bool process_module_sockets)
 608 {
 609         bool expire_run = false;
 610         int activefds[MAX_DESCRIPTORS];
 611         int incomingSockfd;
 612         int in_port;
 613         userrec* cu = NULL;
 614         InspSocket* s = NULL;
 615         InspSocket* s_del = NULL;
 616         unsigned int numberactive;
 617         sockaddr_in sock_us;     // our port number
 618         socklen_t uslen;         // length of our port number
 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 % 5) == 0) && (!expire_run))
 632         {
 633                 expire_lines();
 634                 FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 635                 TickMissedTimers(TIME);
 636                 expire_run = true;
 637                 return;
 638         }
 639         else if ((TIME % 5) == 1)
 640         {
 641                 expire_run = false;
 642         }
 643
 644         /* Once a second, do the background processing */
 645         if (TIME != OLDTIME)
 646         {
 647                 if (TIME < OLDTIME)
 648                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 649                 DoBackgroundUserStuff(TIME);
 650         }
 651
 652         /* Process timeouts on module sockets each time around
 653          * the loop. There shouldnt be many module sockets, at
 654          * most, 20 or so, so this won't be much of a performance
 655          * hit at all.
 656          */
 657         if (process_module_sockets)
 658                 DoSocketTimeouts(TIME);
 659
 660         TickTimers(TIME);
 661
 662         /* Call the socket engine to wait on the active
 663          * file descriptors. The socket engine has everything's
 664          * descriptors in its list... dns, modules, users,
 665          * servers... so its nice and easy, just one call.
 666          */
 667         if (!(numberactive = SE->Wait(activefds)))
 668                 return;
 669
 670         /**
 671          * Now process each of the fd's. For users, we have a fast
 672          * lookup table which can find a user by file descriptor, so
 673          * processing them by fd isnt expensive. If we have a lot of
 674          * listening ports or module sockets though, things could get
 675          * ugly.
 676          */
 677         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 678         {
 679                 int socket_type = SE->GetType(activefds[activefd]);
 680                 switch (socket_type)
 681                 {
 682                         case X_ESTAB_CLIENT:
 683
 684                                 cu = fd_ref_table[activefds[activefd]];
 685                                 if (cu)
 686                                         ProcessUser(cu);
 687
 688                         break;
 689
 690                         case X_ESTAB_MODULE:
 691
 692                                 if (!process_module_sockets)
 693                                         return;
 694
 695                                 /* Process module-owned sockets.
 696                                  * Modules are encouraged to inherit their sockets from
 697                                  * InspSocket so we can process them neatly like this.
 698                                  */
 699                                 s = socket_ref[activefds[activefd]];
 700
 701                                 if ((s) && (!s->Poll()))
 702                                 {
 703                                         log(DEBUG,"Socket poll returned false, close and bail");
 704                                         SE->DelFd(s->GetFd());
 705                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 706                                         {
 707                                                 s_del = (InspSocket*)*a;
 708                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 709                                                 {
 710                                                         module_sockets.erase(a);
 711                                                         break;
 712                                                 }
 713                                         }
 714                                         s->Close();
 715                                         delete s;
 716                                 }
 717                         break;
 718
 719                         case X_ESTAB_DNS:
 720                                 /* When we are using single-threaded dns,
 721                                  * the sockets for dns end up in our mainloop.
 722                                  * When we are using multi-threaded dns,
 723                                  * each thread has its own basic poll() loop
 724                                  * within it, making them 'fire and forget'
 725                                  * and independent of the mainloop.
 726                                  */
 727 #ifndef THREADED_DNS
 728                                 dns_poll(activefds[activefd]);
 729 #endif
 730                         break;
 731
 732                         case X_LISTEN:
 733
 734                                 /* It's a listener */
 735                                 uslen = sizeof(sock_us);
 736                                 length = sizeof(client);
 737                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 738
 739                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 740                                 {
 741                                         in_port = ntohs(sock_us.sin_port);
 742                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 743                                         /* Years and years ago, we used to resolve here
 744                                          * using gethostbyaddr(). That is sucky and we
 745                                          * don't do that any more...
 746                                          */
 747                                         NonBlocking(incomingSockfd);
 748                                         if (Config->GetIOHook(in_port))
 749                                         {
 750                                                 try
 751                                                 {
 752                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 753                                                 }
 754                                                 catch (ModuleException& modexcept)
 755                                                 {
 756                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason()); \
 757                                                 }
 758                                         }
 759                                         stats->statsAccept++;
 760                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 761                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 762                                 }
 763                                 else
 764                                 {
 765                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 766                                         shutdown(incomingSockfd,2);
 767                                         close(incomingSockfd);
 768                                         stats->statsRefused++;
 769                                 }
 770                         break;
 771
 772                         default:
 773                                 /* Something went wrong if we're in here.
 774                                  * In fact, so wrong, im not quite sure
 775                                  * what we would do, so for now, its going
 776                                  * to safely do bugger all.
 777                                  */
 778                         break;
 779                 }
 780         }
 781 }
 782
 783 int InspIRCd::Run()
 784 {
 785         /* Until THIS point, ServerInstance == NULL */
 786
 787         LoadAllModules(this);
 788
 789         printf("\nInspIRCd is now running!\n");
 790
 791         if (!Config->nofork)
 792         {
 793                 freopen("/dev/null","w",stdout);
 794                 freopen("/dev/null","w",stderr);
 795         }
 796
 797         /* Add the listening sockets used for client inbound connections
 798          * to the socket engine
 799          */
 800         for (int count = 0; count < stats->BoundPortCount; count++)
 801                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 802
 803         WritePID(Config->PID);
 804
 805         /* main loop, this never returns */
 806         while (true)
 807         {
 808                 DoOneIteration(true);
 809         }
 810         /* This is never reached -- we hope! */
 811         return 0;
 812 }
 813
 814 /**********************************************************************************/
 815
 816 /**
 817  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 818  */
 819
 820 int main(int argc, char** argv)
 821 {
 822         ServerInstance = new InspIRCd(argc, argv);
 823         ServerInstance->Run();
 824         delete ServerInstance;
 825         return 0;
 826 }
 827