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                         if (!strcmp(argv[i],"-wait"))
 175                         {
 176                                 sleep(6);
 177                         }
 178                         if (!strcmp(argv[i],"-nolimit"))
 179                         {
 180                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 181                         }
 182                         if (!strcmp(argv[i],"-logfile"))
 183                         {
 184                                 if (argc > i+1)
 185                                 {
 186                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 187                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 188                                 }
 189                                 else
 190                                 {
 191                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 192                                         Exit(ERROR);
 193                                 }
 194                         }
 195                 }
 196         }
 197
 198         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 199
 200         this->MakeLowerMap();
 201
 202         OpenLog(argv, argc);
 203         this->stats = new serverstats();
 204         Config->ClearStack();
 205         Config->Read(true,NULL);
 206         CheckRoot();
 207         this->ModeGrok = new ModeParser();
 208         this->Parser = new CommandParser();
 209         AddServerName(Config->ServerName);
 210         CheckDie();
 211         stats->BoundPortCount = BindPorts(true);
 212
 213         for(int t = 0; t < 255; t++)
 214                 Config->global_implementation[t] = 0;
 215
 216         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 217
 218         printf("\n");
 219         SetSignals();
 220         if (!Config->nofork)
 221         {
 222                 if (!DaemonSeed())
 223                 {
 224                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 225                         Exit(ERROR);
 226                 }
 227         }
 228
 229         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 230          * initialize the socket engine.
 231          */
 232         SE = new SocketEngine();
 233
 234         /* We must load the modules AFTER initializing the socket engine, now */
 235
 236         return;
 237 }
 238
 239 std::string InspIRCd::GetVersionString()
 240 {
 241         char versiondata[MAXBUF];
 242 #ifdef THREADED_DNS
 243         char dnsengine[] = "multithread";
 244 #else
 245         char dnsengine[] = "singlethread";
 246 #endif
 247         if (*Config->CustomVersion)
 248         {
 249                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 250         }
 251         else
 252         {
 253                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 254         }
 255         return versiondata;
 256 }
 257
 258 char* InspIRCd::ModuleError()
 259 {
 260         return MODERR;
 261 }
 262
 263 void InspIRCd::erase_factory(int j)
 264 {
 265         int v = 0;
 266         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 267         {
 268                 if (v == j)
 269                 {
 270                         factory.erase(t);
 271                         factory.push_back(NULL);
 272                         return;
 273                 }
 274                 v++;
 275         }
 276 }
 277
 278 void InspIRCd::erase_module(int j)
 279 {
 280         int v1 = 0;
 281         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 282         {
 283                 if (v1 == j)
 284                 {
 285                         delete *m;
 286                         modules.erase(m);
 287                         modules.push_back(NULL);
 288                         break;
 289                 }
 290                 v1++;
 291         }
 292         int v2 = 0;
 293         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 294         {
 295                 if (v2 == j)
 296                 {
 297                        Config->module_names.erase(v);
 298                        break;
 299                 }
 300                 v2++;
 301         }
 302
 303 }
 304
 305 void InspIRCd::MoveTo(std::string modulename,int slot)
 306 {
 307         unsigned int v2 = 256;
 308         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 309         {
 310                 if (Config->module_names[v] == modulename)
 311                 {
 312                         // found an instance, swap it with the item at MODCOUNT
 313                         v2 = v;
 314                         break;
 315                 }
 316         }
 317         if ((v2 != (unsigned int)slot) && (v2 < 256))
 318         {
 319                 // Swap the module names over
 320                 Config->module_names[v2] = Config->module_names[slot];
 321                 Config->module_names[slot] = modulename;
 322                 // now swap the module factories
 323                 ircd_module* temp = factory[v2];
 324                 factory[v2] = factory[slot];
 325                 factory[slot] = temp;
 326                 // now swap the module objects
 327                 Module* temp_module = modules[v2];
 328                 modules[v2] = modules[slot];
 329                 modules[slot] = temp_module;
 330                 // now swap the implement lists (we dont
 331                 // need to swap the global or recount it)
 332                 for (int n = 0; n < 255; n++)
 333                 {
 334                         char x = Config->implement_lists[v2][n];
 335                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 336                         Config->implement_lists[slot][n] = x;
 337                 }
 338         }
 339         else
 340         {
 341                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 342         }
 343 }
 344
 345 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 346 {
 347         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 348         {
 349                 if (Config->module_names[v] == after)
 350                 {
 351                         MoveTo(modulename, v);
 352                         return;
 353                 }
 354         }
 355 }
 356
 357 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 358 {
 359         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 360         {
 361                 if (Config->module_names[v] == before)
 362                 {
 363                         if (v > 0)
 364                         {
 365                                 MoveTo(modulename, v-1);
 366                         }
 367                         else
 368                         {
 369                                 MoveTo(modulename, v);
 370                         }
 371                         return;
 372                 }
 373         }
 374 }
 375
 376 void InspIRCd::MoveToFirst(std::string modulename)
 377 {
 378         MoveTo(modulename,0);
 379 }
 380
 381 void InspIRCd::MoveToLast(std::string modulename)
 382 {
 383         MoveTo(modulename,MODCOUNT);
 384 }
 385
 386 void InspIRCd::BuildISupport()
 387 {
 388         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 389         std::stringstream v;
 390         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 391         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 392         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 393         Config->data005 = v.str();
 394         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 395 }
 396
 397 bool InspIRCd::UnloadModule(const char* filename)
 398 {
 399         std::string filename_str = filename;
 400         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 401         {
 402                 if (Config->module_names[j] == filename_str)
 403                 {
 404                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 405                         {
 406                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 407                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 408                                 return false;
 409                         }
 410                         /* Give the module a chance to tidy out all its metadata */
 411                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 412                         {
 413                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 414                         }
 415                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 416                         {
 417                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 418                         }
 419
 420                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 421
 422                         for(int t = 0; t < 255; t++)
 423                         {
 424                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 425                         }
 426
 427                         /* We have to renumber implement_lists after unload because the module numbers change!
 428                          */
 429                         for(int j2 = j; j2 < 254; j2++)
 430                         {
 431                                 for(int t = 0; t < 255; t++)
 432                                 {
 433                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 434                                 }
 435                         }
 436
 437                         // found the module
 438                         log(DEBUG,"Deleting module...");
 439                         erase_module(j);
 440                         log(DEBUG,"Erasing module entry...");
 441                         erase_factory(j);
 442                         log(DEBUG,"Removing dependent commands...");
 443                         Parser->RemoveCommands(filename);
 444                         log(DEFAULT,"Module %s unloaded",filename);
 445                         MODCOUNT--;
 446                         BuildISupport();
 447                         return true;
 448                 }
 449         }
 450         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 451         snprintf(MODERR,MAXBUF,"Module not loaded");
 452         return false;
 453 }
 454
 455 bool InspIRCd::LoadModule(const char* filename)
 456 {
 457         char modfile[MAXBUF];
 458 #ifdef STATIC_LINK
 459         strlcpy(modfile,filename,MAXBUF);
 460 #else
 461         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 462 #endif
 463         std::string filename_str = filename;
 464 #ifndef STATIC_LINK
 465 #ifndef IS_CYGWIN
 466         if (!DirValid(modfile))
 467         {
 468                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 469                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 470                 return false;
 471         }
 472 #endif
 473 #endif
 474         log(DEBUG,"Loading module: %s",modfile);
 475 #ifndef STATIC_LINK
 476         if (FileExists(modfile))
 477         {
 478 #endif
 479                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 480                 {
 481                         if (Config->module_names[j] == filename_str)
 482                         {
 483                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 484                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 485                                 return false;
 486                         }
 487                 }
 488                 ircd_module* a = new ircd_module(modfile);
 489                 factory[MODCOUNT+1] = a;
 490                 if (factory[MODCOUNT+1]->LastError())
 491                 {
 492                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 493                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 494                         return false;
 495                 }
 496                 try
 497                 {
 498                         if (factory[MODCOUNT+1]->factory)
 499                         {
 500                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 501                                 modules[MODCOUNT+1] = m;
 502                                 /* save the module and the module's classfactory, if
 503                                  * this isnt done, random crashes can occur :/ */
 504                                 Config->module_names.push_back(filename);
 505
 506                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 507                                 for(int t = 0; t < 255; t++)
 508                                         x[t] = 0;
 509
 510                                 modules[MODCOUNT+1]->Implements(x);
 511
 512                                 for(int t = 0; t < 255; t++)
 513                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 514                         }
 515                         else
 516                         {
 517                                 log(DEFAULT,"Unable to load %s",modfile);
 518                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 519                                 return false;
 520                         }
 521                 }
 522                 catch (ModuleException& modexcept)
 523                 {
 524                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 525                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 526                         return false;
 527                 }
 528 #ifndef STATIC_LINK
 529         }
 530         else
 531         {
 532                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 533                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 534                 return false;
 535         }
 536 #endif
 537         MODCOUNT++;
 538         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 539         // now work out which modules, if any, want to move to the back of the queue,
 540         // and if they do, move them there.
 541         std::vector<std::string> put_to_back;
 542         std::vector<std::string> put_to_front;
 543         std::map<std::string,std::string> put_before;
 544         std::map<std::string,std::string> put_after;
 545         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 546         {
 547                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 548                 {
 549                         put_to_back.push_back(Config->module_names[j]);
 550                 }
 551                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 552                 {
 553                         put_to_front.push_back(Config->module_names[j]);
 554                 }
 555                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 556                 {
 557                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 558                 }
 559                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 560                 {
 561                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 562                 }
 563         }
 564         for (unsigned int j = 0; j < put_to_back.size(); j++)
 565         {
 566                 MoveToLast(put_to_back[j]);
 567         }
 568         for (unsigned int j = 0; j < put_to_front.size(); j++)
 569         {
 570                 MoveToFirst(put_to_front[j]);
 571         }
 572         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 573         {
 574                 MoveBefore(j->first,j->second);
 575         }
 576         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 577         {
 578                 MoveAfter(j->first,j->second);
 579         }
 580         BuildISupport();
 581         return true;
 582 }
 583
 584 void InspIRCd::DoOneIteration(bool process_module_sockets)
 585 {
 586         int activefds[MAX_DESCRIPTORS];
 587         int incomingSockfd;
 588         int in_port;
 589         userrec* cu = NULL;
 590         InspSocket* s = NULL;
 591         InspSocket* s_del = NULL;
 592         unsigned int numberactive;
 593         sockaddr_in sock_us;     // our port number
 594         socklen_t uslen;         // length of our port number
 595
 596         if (yield_depth > 100)
 597                 return;
 598
 599         yield_depth++;
 600
 601         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 602          * Once per loop iteration is pleanty.
 603          */
 604         OLDTIME = TIME;
 605         TIME = time(NULL);
 606
 607         /* Run background module timers every few seconds
 608          * (the docs say modules shouldnt rely on accurate
 609          * timing using this event, so we dont have to
 610          * time this exactly).
 611          */
 612         if (((TIME % 5) == 0) && (!expire_run))
 613         {
 614                 expire_lines();
 615                 if (process_module_sockets)
 616                 {
 617                         /* Fix by brain - the addition of DoOneIteration means that this
 618                          * can end up getting called recursively in the following pattern:
 619                          *
 620                          * m_spanningtree DoPingChecks
 621                          * (server pings out and is squit)
 622                          * (squit causes call to DoOneIteration)
 623                          * DoOneIteration enters here
 624                          * calls DoBackground timer
 625                          * enters m_spanningtree DoPingChecks... see step 1.
 626                          *
 627                          * This should do the job and fix the bug.
 628                          */
 629                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 630                 }
 631                 TickMissedTimers(TIME);
 632                 expire_run = true;
 633                 yield_depth--;
 634                 return;
 635         }
 636         else if ((TIME % 5) == 1)
 637         {
 638                 expire_run = false;
 639         }
 640
 641         if (iterations++ == 15)
 642         {
 643                 iterations = 0;
 644                 DoBackgroundUserStuff(TIME);
 645         }
 646
 647         /* Once a second, do the background processing */
 648         if (TIME != OLDTIME)
 649         {
 650                 if (TIME < OLDTIME)
 651                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 652                 if ((TIME % 3600) == 0)
 653                 {
 654                         MaintainWhoWas(TIME);
 655                 }
 656         }
 657
 658         /* Process timeouts on module sockets each time around
 659          * the loop. There shouldnt be many module sockets, at
 660          * most, 20 or so, so this won't be much of a performance
 661          * hit at all.
 662          */
 663         if (process_module_sockets)
 664                 DoSocketTimeouts(TIME);
 665
 666         TickTimers(TIME);
 667
 668         /* Call the socket engine to wait on the active
 669          * file descriptors. The socket engine has everything's
 670          * descriptors in its list... dns, modules, users,
 671          * servers... so its nice and easy, just one call.
 672          */
 673         if (!(numberactive = SE->Wait(activefds)))
 674         {
 675                 yield_depth--;
 676                 return;
 677         }
 678
 679         /**
 680          * Now process each of the fd's. For users, we have a fast
 681          * lookup table which can find a user by file descriptor, so
 682          * processing them by fd isnt expensive. If we have a lot of
 683          * listening ports or module sockets though, things could get
 684          * ugly.
 685          */
 686         log(DEBUG,"There are %d fd's to process.",numberactive);
 687
 688         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 689         {
 690                 int socket_type = SE->GetType(activefds[activefd]);
 691                 switch (socket_type)
 692                 {
 693                         case X_ESTAB_CLIENT:
 694
 695                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 696                                 cu = fd_ref_table[activefds[activefd]];
 697                                 if (cu)
 698                                         ProcessUser(cu);
 699
 700                         break;
 701
 702                         case X_ESTAB_MODULE:
 703
 704                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 705
 706                                 if (!process_module_sockets)
 707                                         break;
 708
 709                                 /* Process module-owned sockets.
 710                                  * Modules are encouraged to inherit their sockets from
 711                                  * InspSocket so we can process them neatly like this.
 712                                  */
 713                                 s = socket_ref[activefds[activefd]];
 714
 715                                 if ((s) && (!s->Poll()))
 716                                 {
 717                                         log(DEBUG,"inspircd.cpp: Socket poll returned false, close and bail");
 718                                         SE->DelFd(s->GetFd());
 719                                         socket_ref[activefds[activefd]] = NULL;
 720                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 721                                         {
 722                                                 s_del = (InspSocket*)*a;
 723                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 724                                                 {
 725                                                         module_sockets.erase(a);
 726                                                         break;
 727                                                 }
 728                                         }
 729                                         s->Close();
 730                                         delete s;
 731                                 }
 732                                 else if (!s)
 733                                 {
 734                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 735                                         SE->DelFd(s->GetFd());
 736                                 }
 737                         break;
 738
 739                         case X_ESTAB_DNS:
 740                                 /* When we are using single-threaded dns,
 741                                  * the sockets for dns end up in our mainloop.
 742                                  * When we are using multi-threaded dns,
 743                                  * each thread has its own basic poll() loop
 744                                  * within it, making them 'fire and forget'
 745                                  * and independent of the mainloop.
 746                                  */
 747 #ifndef THREADED_DNS
 748                                 log(DEBUG,"Type: X_ESTAB_DNS: fd=%d",activefds[activefd]);
 749                                 dns_poll(activefds[activefd]);
 750 #endif
 751                         break;
 752
 753                         case X_LISTEN:
 754
 755                                 log(DEBUG,"Type: X_LISTEN_MODULE: fd=%d",activefds[activefd]);
 756
 757                                 /* It's a listener */
 758                                 uslen = sizeof(sock_us);
 759                                 length = sizeof(client);
 760                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 761
 762                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 763                                 {
 764                                         in_port = ntohs(sock_us.sin_port);
 765                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 766                                         /* Years and years ago, we used to resolve here
 767                                          * using gethostbyaddr(). That is sucky and we
 768                                          * don't do that any more...
 769                                          */
 770                                         NonBlocking(incomingSockfd);
 771                                         if (Config->GetIOHook(in_port))
 772                                         {
 773                                                 try
 774                                                 {
 775                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 776                                                 }
 777                                                 catch (ModuleException& modexcept)
 778                                                 {
 779                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 780                                                 }
 781                                         }
 782                                         stats->statsAccept++;
 783                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 784                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 785                                 }
 786                                 else
 787                                 {
 788                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 789                                         shutdown(incomingSockfd,2);
 790                                         close(incomingSockfd);
 791                                         stats->statsRefused++;
 792                                 }
 793                         break;
 794
 795                         default:
 796                                 /* Something went wrong if we're in here.
 797                                  * In fact, so wrong, im not quite sure
 798                                  * what we would do, so for now, its going
 799                                  * to safely do bugger all.
 800                                  */
 801                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 802                                 SE->DelFd(activefds[activefd]);
 803                         break;
 804                 }
 805         }
 806         yield_depth--;
 807 }
 808
 809 int InspIRCd::Run()
 810 {
 811         /* Until THIS point, ServerInstance == NULL */
 812
 813         LoadAllModules(this);
 814
 815         /* Just in case no modules were loaded - fix for bug #101 */
 816         this->BuildISupport();
 817
 818         printf("\nInspIRCd is now running!\n");
 819
 820         if (!Config->nofork)
 821         {
 822                 fclose(stdout);
 823                 fclose(stderr);
 824                 fclose(stdin);
 825         }
 826
 827         /* Add the listening sockets used for client inbound connections
 828          * to the socket engine
 829          */
 830         for (int count = 0; count < stats->BoundPortCount; count++)
 831                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 832
 833         WritePID(Config->PID);
 834
 835         /* main loop, this never returns */
 836         expire_run = false;
 837         yield_depth = 0;
 838         iterations = 0;
 839
 840         while (true)
 841         {
 842                 DoOneIteration(true);
 843         }
 844         /* This is never reached -- we hope! */
 845         return 0;
 846 }
 847
 848 /**********************************************************************************/
 849
 850 /**
 851  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 852  */
 853
 854 int main(int argc, char** argv)
 855 {
 856         try
 857         {
 858                 ServerInstance = new InspIRCd(argc, argv);
 859                 ServerInstance->Run();
 860                 delete ServerInstance;
 861         }
 862         catch (std::bad_alloc)
 863         {
 864                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
 865                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 866                 printf("Out of memory! (got exception std::bad_alloc!");
 867         }
 868         return 0;
 869 }
 870