src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include <fcntl.h>
  25 #include <sys/errno.h>
  26 #include <sys/ioctl.h>
  27 #include <time.h>
  28 #include <string>
  29 #include <exception>
  30 #include <stdexcept>
  31 #include <new>
  32 #ifdef GCC3
  33 #include <ext/hash_map>
  34 #else
  35 #include <hash_map>
  36 #endif
  37 #include <map>
  38 #include <sstream>
  39 #include <vector>
  40 #include <deque>
  41 #ifdef THREADED_DNS
  42 #include <pthread.h>
  43 #endif
  44 #include "users.h"
  45 #include "ctables.h"
  46 #include "globals.h"
  47 #include "modules.h"
  48 #include "dynamic.h"
  49 #include "wildcard.h"
  50 #include "message.h"
  51 #include "mode.h"
  52 #include "commands.h"
  53 #include "xline.h"
  54 #include "inspstring.h"
  55 #include "dnsqueue.h"
  56 #include "helperfuncs.h"
  57 #include "hashcomp.h"
  58 #include "socketengine.h"
  59 #include "userprocess.h"
  60 #include "socket.h"
  61 #include "typedefs.h"
  62 #include "command_parse.h"
  63
  64 InspIRCd* ServerInstance;
  65
  66 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  67 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  68
  69 extern std::vector<Module*> modules;
  70 extern std::vector<ircd_module*> factory;
  71
  72 std::vector<InspSocket*> module_sockets;
  73 std::vector<userrec*> local_users;
  74
  75 extern int MODCOUNT;
  76 extern char LOG_FILE[MAXBUF];
  77 int openSockfd[MAX_DESCRIPTORS];
  78 int yield_depth;
  79 int iterations = 0;
  80 sockaddr_in client,server;
  81 socklen_t length;
  82
  83 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  84
  85 time_t TIME = time(NULL), OLDTIME = time(NULL);
  86
  87 // This table references users by file descriptor.
  88 // its an array to make it VERY fast, as all lookups are referenced
  89 // by an integer, meaning there is no need for a scan/search operation.
  90 userrec* fd_ref_table[MAX_DESCRIPTORS];
  91
  92 Server* MyServer = new Server;
  93 ServerConfig *Config = new ServerConfig;
  94
  95 user_hash clientlist;
  96 chan_hash chanlist;
  97
  98 servernamelist servernames;
  99 char lowermap[255];
 100
 101 void AddServerName(std::string servername)
 102 {
 103         log(DEBUG,"Adding server name: %s",servername.c_str());
 104         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 105         {
 106                 if (*a == servername)
 107                         return;
 108         }
 109         servernames.push_back(servername);
 110 }
 111
 112 const char* FindServerNamePtr(std::string servername)
 113 {
 114         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 115         {
 116                 if (*a == servername)
 117                         return a->c_str();
 118         }
 119         AddServerName(servername);
 120         return FindServerNamePtr(servername);
 121 }
 122
 123 bool FindServerName(std::string servername)
 124 {
 125         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 126         {
 127                 if (*a == servername)
 128                         return true;
 129         }
 130         return false;
 131 }
 132
 133 std::string InspIRCd::GetRevision()
 134 {
 135         return REVISION;
 136 }
 137
 138 void InspIRCd::MakeLowerMap()
 139 {
 140         // initialize the lowercase mapping table
 141         for (unsigned int cn = 0; cn < 256; cn++)
 142                 lowermap[cn] = cn;
 143         // lowercase the uppercase chars
 144         for (unsigned int cn = 65; cn < 91; cn++)
 145                 lowermap[cn] = tolower(cn);
 146         // now replace the specific chars for scandanavian comparison
 147         lowermap[(unsigned)'['] = '{';
 148         lowermap[(unsigned)']'] = '}';
 149         lowermap[(unsigned)'\\'] = '|';
 150 }
 151
 152 InspIRCd::InspIRCd(int argc, char** argv)
 153 {
 154         Start();
 155         module_sockets.clear();
 156         this->startup_time = time(NULL);
 157         srand(time(NULL));
 158         log(DEBUG,"*** InspIRCd starting up!");
 159         if (!FileExists(CONFIG_FILE))
 160         {
 161                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 162                 log(DEFAULT,"main: no config");
 163                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 164                 Exit(ERROR);
 165         }
 166         *LOG_FILE = 0;
 167         if (argc > 1) {
 168                 for (int i = 1; i < argc; i++)
 169                 {
 170                         if (!strcmp(argv[i],"-nofork"))
 171                         {
 172                                 Config->nofork = true;
 173                         }
 174                         else if(!strcmp(argv[i],"-debug"))
 175                         {
 176                                 Config->forcedebug = true;
 177                         }
 178                         else if(!strcmp(argv[i],"-nolog"))
 179                         {
 180                                 Config->writelog = false;
 181                         }
 182                         else if (!strcmp(argv[i],"-wait"))
 183                         {
 184                                 sleep(6);
 185                         }
 186                         else if (!strcmp(argv[i],"-nolimit"))
 187                         {
 188                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 189                         }
 190                         else if (!strcmp(argv[i],"-logfile"))
 191                         {
 192                                 if (argc > i+1)
 193                                 {
 194                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 195                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 196                                 }
 197                                 else
 198                                 {
 199                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 200                                         Exit(ERROR);
 201                                 }
 202                         }
 203                 }
 204         }
 205
 206         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 207
 208         this->MakeLowerMap();
 209
 210         OpenLog(argv, argc);
 211         this->stats = new serverstats();
 212         Config->ClearStack();
 213         Config->Read(true,NULL);
 214         CheckRoot();
 215         this->ModeGrok = new ModeParser();
 216         this->Parser = new CommandParser();
 217         AddServerName(Config->ServerName);
 218         CheckDie();
 219         stats->BoundPortCount = BindPorts(true);
 220
 221         for(int t = 0; t < 255; t++)
 222                 Config->global_implementation[t] = 0;
 223
 224         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 225
 226         printf("\n");
 227         SetSignals();
 228         if (!Config->nofork)
 229         {
 230                 if (!DaemonSeed())
 231                 {
 232                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 233                         Exit(ERROR);
 234                 }
 235         }
 236
 237         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 238          * initialize the socket engine.
 239          */
 240         SE = new SocketEngine();
 241
 242         /* We must load the modules AFTER initializing the socket engine, now */
 243
 244         return;
 245 }
 246
 247 std::string InspIRCd::GetVersionString()
 248 {
 249         char versiondata[MAXBUF];
 250 #ifdef THREADED_DNS
 251         char dnsengine[] = "multithread";
 252 #else
 253         char dnsengine[] = "singlethread";
 254 #endif
 255         if (*Config->CustomVersion)
 256         {
 257                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 258         }
 259         else
 260         {
 261                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 262         }
 263         return versiondata;
 264 }
 265
 266 char* InspIRCd::ModuleError()
 267 {
 268         return MODERR;
 269 }
 270
 271 void InspIRCd::erase_factory(int j)
 272 {
 273         int v = 0;
 274         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 275         {
 276                 if (v == j)
 277                 {
 278                         factory.erase(t);
 279                         factory.push_back(NULL);
 280                         return;
 281                 }
 282                 v++;
 283         }
 284 }
 285
 286 void InspIRCd::erase_module(int j)
 287 {
 288         int v1 = 0;
 289         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 290         {
 291                 if (v1 == j)
 292                 {
 293                         delete *m;
 294                         modules.erase(m);
 295                         modules.push_back(NULL);
 296                         break;
 297                 }
 298                 v1++;
 299         }
 300         int v2 = 0;
 301         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 302         {
 303                 if (v2 == j)
 304                 {
 305                        Config->module_names.erase(v);
 306                        break;
 307                 }
 308                 v2++;
 309         }
 310
 311 }
 312
 313 void InspIRCd::MoveTo(std::string modulename,int slot)
 314 {
 315         unsigned int v2 = 256;
 316         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 317         {
 318                 if (Config->module_names[v] == modulename)
 319                 {
 320                         // found an instance, swap it with the item at MODCOUNT
 321                         v2 = v;
 322                         break;
 323                 }
 324         }
 325         if ((v2 != (unsigned int)slot) && (v2 < 256))
 326         {
 327                 // Swap the module names over
 328                 Config->module_names[v2] = Config->module_names[slot];
 329                 Config->module_names[slot] = modulename;
 330                 // now swap the module factories
 331                 ircd_module* temp = factory[v2];
 332                 factory[v2] = factory[slot];
 333                 factory[slot] = temp;
 334                 // now swap the module objects
 335                 Module* temp_module = modules[v2];
 336                 modules[v2] = modules[slot];
 337                 modules[slot] = temp_module;
 338                 // now swap the implement lists (we dont
 339                 // need to swap the global or recount it)
 340                 for (int n = 0; n < 255; n++)
 341                 {
 342                         char x = Config->implement_lists[v2][n];
 343                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 344                         Config->implement_lists[slot][n] = x;
 345                 }
 346         }
 347         else
 348         {
 349                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 350         }
 351 }
 352
 353 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 354 {
 355         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 356         {
 357                 if (Config->module_names[v] == after)
 358                 {
 359                         MoveTo(modulename, v);
 360                         return;
 361                 }
 362         }
 363 }
 364
 365 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 366 {
 367         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 368         {
 369                 if (Config->module_names[v] == before)
 370                 {
 371                         if (v > 0)
 372                         {
 373                                 MoveTo(modulename, v-1);
 374                         }
 375                         else
 376                         {
 377                                 MoveTo(modulename, v);
 378                         }
 379                         return;
 380                 }
 381         }
 382 }
 383
 384 void InspIRCd::MoveToFirst(std::string modulename)
 385 {
 386         MoveTo(modulename,0);
 387 }
 388
 389 void InspIRCd::MoveToLast(std::string modulename)
 390 {
 391         MoveTo(modulename,MODCOUNT);
 392 }
 393
 394 void InspIRCd::BuildISupport()
 395 {
 396         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 397         std::stringstream v;
 398         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 399         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 400         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 401         Config->data005 = v.str();
 402         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 403 }
 404
 405 bool InspIRCd::UnloadModule(const char* filename)
 406 {
 407         std::string filename_str = filename;
 408         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 409         {
 410                 if (Config->module_names[j] == filename_str)
 411                 {
 412                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 413                         {
 414                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 415                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 416                                 return false;
 417                         }
 418                         /* Give the module a chance to tidy out all its metadata */
 419                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 420                         {
 421                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 422                         }
 423                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 424                         {
 425                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 426                         }
 427
 428                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 429
 430                         for(int t = 0; t < 255; t++)
 431                         {
 432                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 433                         }
 434
 435                         /* We have to renumber implement_lists after unload because the module numbers change!
 436                          */
 437                         for(int j2 = j; j2 < 254; j2++)
 438                         {
 439                                 for(int t = 0; t < 255; t++)
 440                                 {
 441                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 442                                 }
 443                         }
 444
 445                         // found the module
 446                         log(DEBUG,"Deleting module...");
 447                         erase_module(j);
 448                         log(DEBUG,"Erasing module entry...");
 449                         erase_factory(j);
 450                         log(DEBUG,"Removing dependent commands...");
 451                         Parser->RemoveCommands(filename);
 452                         log(DEFAULT,"Module %s unloaded",filename);
 453                         MODCOUNT--;
 454                         BuildISupport();
 455                         return true;
 456                 }
 457         }
 458         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 459         snprintf(MODERR,MAXBUF,"Module not loaded");
 460         return false;
 461 }
 462
 463 bool InspIRCd::LoadModule(const char* filename)
 464 {
 465         char modfile[MAXBUF];
 466 #ifdef STATIC_LINK
 467         strlcpy(modfile,filename,MAXBUF);
 468 #else
 469         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 470 #endif
 471         std::string filename_str = filename;
 472 #ifndef STATIC_LINK
 473 #ifndef IS_CYGWIN
 474         if (!DirValid(modfile))
 475         {
 476                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 477                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 478                 return false;
 479         }
 480 #endif
 481 #endif
 482         log(DEBUG,"Loading module: %s",modfile);
 483 #ifndef STATIC_LINK
 484         if (FileExists(modfile))
 485         {
 486 #endif
 487                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 488                 {
 489                         if (Config->module_names[j] == filename_str)
 490                         {
 491                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 492                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 493                                 return false;
 494                         }
 495                 }
 496                 ircd_module* a = new ircd_module(modfile);
 497                 factory[MODCOUNT+1] = a;
 498                 if (factory[MODCOUNT+1]->LastError())
 499                 {
 500                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 501                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 502                         return false;
 503                 }
 504                 try
 505                 {
 506                         if (factory[MODCOUNT+1]->factory)
 507                         {
 508                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 509                                 modules[MODCOUNT+1] = m;
 510                                 /* save the module and the module's classfactory, if
 511                                  * this isnt done, random crashes can occur :/ */
 512                                 Config->module_names.push_back(filename);
 513
 514                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 515                                 for(int t = 0; t < 255; t++)
 516                                         x[t] = 0;
 517
 518                                 modules[MODCOUNT+1]->Implements(x);
 519
 520                                 for(int t = 0; t < 255; t++)
 521                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 522                         }
 523                         else
 524                         {
 525                                 log(DEFAULT,"Unable to load %s",modfile);
 526                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 527                                 return false;
 528                         }
 529                 }
 530                 catch (ModuleException& modexcept)
 531                 {
 532                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 533                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 534                         return false;
 535                 }
 536 #ifndef STATIC_LINK
 537         }
 538         else
 539         {
 540                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 541                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 542                 return false;
 543         }
 544 #endif
 545         MODCOUNT++;
 546         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 547         // now work out which modules, if any, want to move to the back of the queue,
 548         // and if they do, move them there.
 549         std::vector<std::string> put_to_back;
 550         std::vector<std::string> put_to_front;
 551         std::map<std::string,std::string> put_before;
 552         std::map<std::string,std::string> put_after;
 553         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 554         {
 555                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 556                 {
 557                         put_to_back.push_back(Config->module_names[j]);
 558                 }
 559                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 560                 {
 561                         put_to_front.push_back(Config->module_names[j]);
 562                 }
 563                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 564                 {
 565                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 566                 }
 567                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 568                 {
 569                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 570                 }
 571         }
 572         for (unsigned int j = 0; j < put_to_back.size(); j++)
 573         {
 574                 MoveToLast(put_to_back[j]);
 575         }
 576         for (unsigned int j = 0; j < put_to_front.size(); j++)
 577         {
 578                 MoveToFirst(put_to_front[j]);
 579         }
 580         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 581         {
 582                 MoveBefore(j->first,j->second);
 583         }
 584         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 585         {
 586                 MoveAfter(j->first,j->second);
 587         }
 588         BuildISupport();
 589         return true;
 590 }
 591
 592 void InspIRCd::DoOneIteration(bool process_module_sockets)
 593 {
 594         int activefds[MAX_DESCRIPTORS];
 595         int incomingSockfd;
 596         int in_port;
 597         userrec* cu = NULL;
 598         InspSocket* s = NULL;
 599         InspSocket* s_del = NULL;
 600         unsigned int numberactive;
 601         sockaddr_in sock_us;     // our port number
 602         socklen_t uslen;         // length of our port number
 603
 604         if (yield_depth > 100)
 605                 return;
 606
 607         yield_depth++;
 608
 609         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 610          * Once per loop iteration is pleanty.
 611          */
 612         OLDTIME = TIME;
 613         TIME = time(NULL);
 614
 615         /* Run background module timers every few seconds
 616          * (the docs say modules shouldnt rely on accurate
 617          * timing using this event, so we dont have to
 618          * time this exactly).
 619          */
 620         if (((TIME % 5) == 0) && (!expire_run))
 621         {
 622                 expire_lines();
 623                 if (process_module_sockets)
 624                 {
 625                         /* Fix by brain - the addition of DoOneIteration means that this
 626                          * can end up getting called recursively in the following pattern:
 627                          *
 628                          * m_spanningtree DoPingChecks
 629                          * (server pings out and is squit)
 630                          * (squit causes call to DoOneIteration)
 631                          * DoOneIteration enters here
 632                          * calls DoBackground timer
 633                          * enters m_spanningtree DoPingChecks... see step 1.
 634                          *
 635                          * This should do the job and fix the bug.
 636                          */
 637                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 638                 }
 639                 TickMissedTimers(TIME);
 640                 expire_run = true;
 641                 yield_depth--;
 642                 return;
 643         }
 644         else if ((TIME % 5) == 1)
 645         {
 646                 expire_run = false;
 647         }
 648
 649         if (iterations++ == 15)
 650         {
 651                 iterations = 0;
 652                 DoBackgroundUserStuff(TIME);
 653         }
 654
 655         /* Once a second, do the background processing */
 656         if (TIME != OLDTIME)
 657         {
 658                 if (TIME < OLDTIME)
 659                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 660                 if ((TIME % 3600) == 0)
 661                 {
 662                         MaintainWhoWas(TIME);
 663                 }
 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         if (process_module_sockets)
 672                 DoSocketTimeouts(TIME);
 673
 674         TickTimers(TIME);
 675
 676         /* Call the socket engine to wait on the active
 677          * file descriptors. The socket engine has everything's
 678          * descriptors in its list... dns, modules, users,
 679          * servers... so its nice and easy, just one call.
 680          */
 681         if (!(numberactive = SE->Wait(activefds)))
 682         {
 683                 yield_depth--;
 684                 return;
 685         }
 686
 687         /**
 688          * Now process each of the fd's. For users, we have a fast
 689          * lookup table which can find a user by file descriptor, so
 690          * processing them by fd isnt expensive. If we have a lot of
 691          * listening ports or module sockets though, things could get
 692          * ugly.
 693          */
 694         log(DEBUG,"There are %d fd's to process.",numberactive);
 695
 696         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 697         {
 698                 int socket_type = SE->GetType(activefds[activefd]);
 699                 switch (socket_type)
 700                 {
 701                         case X_ESTAB_CLIENT:
 702
 703                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 704                                 cu = fd_ref_table[activefds[activefd]];
 705                                 if (cu)
 706                                         ProcessUser(cu);
 707
 708                         break;
 709
 710                         case X_ESTAB_MODULE:
 711
 712                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 713
 714                                 if (!process_module_sockets)
 715                                         break;
 716
 717                                 /* Process module-owned sockets.
 718                                  * Modules are encouraged to inherit their sockets from
 719                                  * InspSocket so we can process them neatly like this.
 720                                  */
 721                                 s = socket_ref[activefds[activefd]];
 722
 723                                 if ((s) && (!s->Poll()))
 724                                 {
 725                                         log(DEBUG,"inspircd.cpp: Socket poll returned false, close and bail");
 726                                         SE->DelFd(s->GetFd());
 727                                         socket_ref[activefds[activefd]] = NULL;
 728                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 729                                         {
 730                                                 s_del = (InspSocket*)*a;
 731                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 732                                                 {
 733                                                         module_sockets.erase(a);
 734                                                         break;
 735                                                 }
 736                                         }
 737                                         s->Close();
 738                                         delete s;
 739                                 }
 740                                 else if (!s)
 741                                 {
 742                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 743                                         SE->DelFd(s->GetFd());
 744                                 }
 745                         break;
 746
 747                         case X_ESTAB_DNS:
 748                                 /* When we are using single-threaded dns,
 749                                  * the sockets for dns end up in our mainloop.
 750                                  * When we are using multi-threaded dns,
 751                                  * each thread has its own basic poll() loop
 752                                  * within it, making them 'fire and forget'
 753                                  * and independent of the mainloop.
 754                                  */
 755 #ifndef THREADED_DNS
 756                                 log(DEBUG,"Type: X_ESTAB_DNS: fd=%d",activefds[activefd]);
 757                                 dns_poll(activefds[activefd]);
 758 #endif
 759                         break;
 760
 761                         case X_LISTEN:
 762
 763                                 log(DEBUG,"Type: X_LISTEN_MODULE: fd=%d",activefds[activefd]);
 764
 765                                 /* It's a listener */
 766                                 uslen = sizeof(sock_us);
 767                                 length = sizeof(client);
 768                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 769
 770                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 771                                 {
 772                                         in_port = ntohs(sock_us.sin_port);
 773                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 774                                         /* Years and years ago, we used to resolve here
 775                                          * using gethostbyaddr(). That is sucky and we
 776                                          * don't do that any more...
 777                                          */
 778                                         NonBlocking(incomingSockfd);
 779                                         if (Config->GetIOHook(in_port))
 780                                         {
 781                                                 try
 782                                                 {
 783                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 784                                                 }
 785                                                 catch (ModuleException& modexcept)
 786                                                 {
 787                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 788                                                 }
 789                                         }
 790                                         stats->statsAccept++;
 791                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 792                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 793                                 }
 794                                 else
 795                                 {
 796                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 797                                         shutdown(incomingSockfd,2);
 798                                         close(incomingSockfd);
 799                                         stats->statsRefused++;
 800                                 }
 801                         break;
 802
 803                         default:
 804                                 /* Something went wrong if we're in here.
 805                                  * In fact, so wrong, im not quite sure
 806                                  * what we would do, so for now, its going
 807                                  * to safely do bugger all.
 808                                  */
 809                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 810                                 SE->DelFd(activefds[activefd]);
 811                         break;
 812                 }
 813         }
 814         yield_depth--;
 815 }
 816
 817 int InspIRCd::Run()
 818 {
 819         /* Until THIS point, ServerInstance == NULL */
 820
 821         LoadAllModules(this);
 822
 823         /* Just in case no modules were loaded - fix for bug #101 */
 824         this->BuildISupport();
 825
 826         printf("\nInspIRCd is now running!\n");
 827
 828         if (!Config->nofork)
 829         {
 830                 fclose(stdout);
 831                 fclose(stderr);
 832                 fclose(stdin);
 833         }
 834
 835         /* Add the listening sockets used for client inbound connections
 836          * to the socket engine
 837          */
 838         for (int count = 0; count < stats->BoundPortCount; count++)
 839                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 840
 841         WritePID(Config->PID);
 842
 843         /* main loop, this never returns */
 844         expire_run = false;
 845         yield_depth = 0;
 846         iterations = 0;
 847
 848         while (true)
 849         {
 850                 DoOneIteration(true);
 851         }
 852         /* This is never reached -- we hope! */
 853         return 0;
 854 }
 855
 856 /**********************************************************************************/
 857
 858 /**
 859  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 860  */
 861
 862 int main(int argc, char** argv)
 863 {
 864         try
 865         {
 866                 ServerInstance = new InspIRCd(argc, argv);
 867                 ServerInstance->Run();
 868                 delete ServerInstance;
 869         }
 870         catch (std::bad_alloc)
 871         {
 872                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
 873                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 874                 printf("Out of memory! (got exception std::bad_alloc!");
 875         }
 876         return 0;
 877 }