src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include <fcntl.h>
  25 #include <sys/errno.h>
  26 #include <sys/ioctl.h>
  27 #include <time.h>
  28 #include <string>
  29 #ifdef GCC3
  30 #include <ext/hash_map>
  31 #else
  32 #include <hash_map>
  33 #endif
  34 #include <map>
  35 #include <sstream>
  36 #include <vector>
  37 #include <deque>
  38 #ifdef THREADED_DNS
  39 #include <pthread.h>
  40 #endif
  41 #include "users.h"
  42 #include "ctables.h"
  43 #include "globals.h"
  44 #include "modules.h"
  45 #include "dynamic.h"
  46 #include "wildcard.h"
  47 #include "message.h"
  48 #include "mode.h"
  49 #include "commands.h"
  50 #include "xline.h"
  51 #include "inspstring.h"
  52 #include "dnsqueue.h"
  53 #include "helperfuncs.h"
  54 #include "hashcomp.h"
  55 #include "socketengine.h"
  56 #include "userprocess.h"
  57 #include "socket.h"
  58 #include "typedefs.h"
  59 #include "command_parse.h"
  60
  61 InspIRCd* ServerInstance;
  62
  63 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  64 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  65
  66 extern std::vector<Module*> modules;
  67 extern std::vector<ircd_module*> factory;
  68
  69 std::vector<InspSocket*> module_sockets;
  70 std::vector<userrec*> local_users;
  71
  72 extern int MODCOUNT;
  73 int openSockfd[MAXSOCKS];
  74 sockaddr_in client,server;
  75 socklen_t length;
  76
  77 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  78
  79 time_t TIME = time(NULL), OLDTIME = time(NULL);
  80
  81 // This table references users by file descriptor.
  82 // its an array to make it VERY fast, as all lookups are referenced
  83 // by an integer, meaning there is no need for a scan/search operation.
  84 userrec* fd_ref_table[MAX_DESCRIPTORS];
  85
  86 Server* MyServer = new Server;
  87 ServerConfig *Config = new ServerConfig;
  88
  89 user_hash clientlist;
  90 chan_hash chanlist;
  91 whowas_hash whowas;
  92 servernamelist servernames;
  93 char lowermap[255];
  94
  95 void AddServerName(std::string servername)
  96 {
  97         log(DEBUG,"Adding server name: %s",servername.c_str());
  98         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
  99         {
 100                 if (*a == servername)
 101                         return;
 102         }
 103         servernames.push_back(servername);
 104 }
 105
 106 const char* FindServerNamePtr(std::string servername)
 107 {
 108         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 109         {
 110                 if (*a == servername)
 111                         return a->c_str();
 112         }
 113         AddServerName(servername);
 114         return FindServerNamePtr(servername);
 115 }
 116
 117 std::string InspIRCd::GetRevision()
 118 {
 119         /* w00t got me to replace a bunch of strtok_r
 120          * with something nicer, so i did this. Its the
 121          * same thing really, only in C++. It places the
 122          * text into a std::stringstream which is a readable
 123          * and writeable buffer stream, and then pops two
 124          * words off it, space delimited. Because it reads
 125          * into the same variable twice, the first word
 126          * is discarded, and the second one returned.
 127          */
 128         std::stringstream Revision("$Revision$");
 129         std::string single;
 130         Revision >> single >> single;
 131         return single;
 132 }
 133
 134 void InspIRCd::MakeLowerMap()
 135 {
 136         // initialize the lowercase mapping table
 137         for (unsigned int cn = 0; cn < 256; cn++)
 138                 lowermap[cn] = cn;
 139         // lowercase the uppercase chars
 140         for (unsigned int cn = 65; cn < 91; cn++)
 141                 lowermap[cn] = tolower(cn);
 142         // now replace the specific chars for scandanavian comparison
 143         lowermap[(unsigned)'['] = '{';
 144         lowermap[(unsigned)']'] = '}';
 145         lowermap[(unsigned)'\\'] = '|';
 146 }
 147
 148 InspIRCd::InspIRCd(int argc, char** argv)
 149 {
 150         Start();
 151         module_sockets.clear();
 152         this->startup_time = time(NULL);
 153         srand(time(NULL));
 154         log(DEBUG,"*** InspIRCd starting up!");
 155         if (!FileExists(CONFIG_FILE))
 156         {
 157                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 158                 log(DEFAULT,"main: no config");
 159                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 160                 Exit(ERROR);
 161         }
 162         if (argc > 1) {
 163                 for (int i = 1; i < argc; i++)
 164                 {
 165                         if (!strcmp(argv[i],"-nofork")) {
 166                                 Config->nofork = true;
 167                         }
 168                         if (!strcmp(argv[i],"-wait")) {
 169                                 sleep(6);
 170                         }
 171                         if (!strcmp(argv[i],"-nolimit")) {
 172                                 Config->unlimitcore = true;
 173                         }
 174                 }
 175         }
 176
 177         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 178
 179         this->MakeLowerMap();
 180
 181         OpenLog(argv, argc);
 182         Config->ClearStack();
 183         Config->Read(true,NULL);
 184         CheckRoot();
 185         this->ModeGrok = new ModeParser();
 186         this->Parser = new CommandParser();
 187         this->stats = new serverstats();
 188         AddServerName(Config->ServerName);
 189         CheckDie();
 190         stats->BoundPortCount = BindPorts();
 191
 192         for(int t = 0; t < 255; t++)
 193                 Config->global_implementation[t] = 0;
 194
 195         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 196
 197         printf("\n");
 198         SetSignals();
 199         if (!Config->nofork)
 200         {
 201                 if (DaemonSeed() == ERROR)
 202                 {
 203                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 204                         Exit(ERROR);
 205                 }
 206         }
 207
 208         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 209          * initialize the socket engine.
 210          */
 211         SE = new SocketEngine();
 212
 213         /* We must load the modules AFTER initializing the socket engine, now */
 214
 215         return;
 216 }
 217
 218 std::string InspIRCd::GetVersionString()
 219 {
 220         char versiondata[MAXBUF];
 221 #ifdef THREADED_DNS
 222         char dnsengine[] = "multithread";
 223 #else
 224         char dnsengine[] = "singlethread";
 225 #endif
 226         if (*Config->CustomVersion)
 227         {
 228                 snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s",VERSION,GetRevision().c_str(),Config->ServerName,Config->CustomVersion);
 229         }
 230         else
 231         {
 232                 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);
 233         }
 234         return versiondata;
 235 }
 236
 237 char* InspIRCd::ModuleError()
 238 {
 239         return MODERR;
 240 }
 241
 242 void InspIRCd::erase_factory(int j)
 243 {
 244         int v = 0;
 245         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 246         {
 247                 if (v == j)
 248                 {
 249                         factory.erase(t);
 250                         factory.push_back(NULL);
 251                         return;
 252                 }
 253                 v++;
 254         }
 255 }
 256
 257 void InspIRCd::erase_module(int j)
 258 {
 259         int v1 = 0;
 260         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 261         {
 262                 if (v1 == j)
 263                 {
 264                         delete *m;
 265                         modules.erase(m);
 266                         modules.push_back(NULL);
 267                         break;
 268                 }
 269                 v1++;
 270         }
 271         int v2 = 0;
 272         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 273         {
 274                 if (v2 == j)
 275                 {
 276                        Config->module_names.erase(v);
 277                        break;
 278                 }
 279                 v2++;
 280         }
 281
 282 }
 283
 284 void InspIRCd::MoveTo(std::string modulename,int slot)
 285 {
 286         unsigned int v2 = 256;
 287         log(DEBUG,"Moving %s to slot %d",modulename.c_str(),slot);
 288         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 289         {
 290                 if (Config->module_names[v] == modulename)
 291                 {
 292                         // found an instance, swap it with the item at MODCOUNT
 293                         v2 = v;
 294                         break;
 295                 }
 296         }
 297         if (v2 == (unsigned int)slot)
 298         {
 299                 log(DEBUG,"Item %s already in slot %d!",modulename.c_str(),slot);
 300         }
 301         else if (v2 < 256)
 302         {
 303                 // Swap the module names over
 304                 Config->module_names[v2] = Config->module_names[slot];
 305                 Config->module_names[slot] = modulename;
 306                 // now swap the module factories
 307                 ircd_module* temp = factory[v2];
 308                 factory[v2] = factory[slot];
 309                 factory[slot] = temp;
 310                 // now swap the module objects
 311                 Module* temp_module = modules[v2];
 312                 modules[v2] = modules[slot];
 313                 modules[slot] = temp_module;
 314                 // now swap the implement lists (we dont
 315                 // need to swap the global or recount it)
 316                 for (int n = 0; n < 255; n++)
 317                 {
 318                         char x = Config->implement_lists[v2][n];
 319                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 320                         Config->implement_lists[slot][n] = x;
 321                 }
 322                 log(DEBUG,"Moved %s to slot successfully",modulename.c_str());
 323         }
 324         else
 325         {
 326                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 327         }
 328 }
 329
 330 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 331 {
 332         log(DEBUG,"Move %s after %s...",modulename.c_str(),after.c_str());
 333         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 334         {
 335                 if (Config->module_names[v] == after)
 336                 {
 337                         MoveTo(modulename, v);
 338                         return;
 339                 }
 340         }
 341 }
 342
 343 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 344 {
 345         log(DEBUG,"Move %s before %s...",modulename.c_str(),before.c_str());
 346         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 347         {
 348                 if (Config->module_names[v] == before)
 349                 {
 350                         if (v > 0)
 351                         {
 352                                 MoveTo(modulename, v-1);
 353                         }
 354                         else
 355                         {
 356                                 MoveTo(modulename, v);
 357                         }
 358                         return;
 359                 }
 360         }
 361 }
 362
 363 void InspIRCd::MoveToFirst(std::string modulename)
 364 {
 365         MoveTo(modulename,0);
 366 }
 367
 368 void InspIRCd::MoveToLast(std::string modulename)
 369 {
 370         MoveTo(modulename,MODCOUNT);
 371 }
 372
 373 void InspIRCd::BuildISupport()
 374 {
 375         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 376         std::stringstream v;
 377         v << "WALLCHOPS MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 NICKLEN=" << NICKMAX-1;
 378         v << " CASEMAPPING=rfc1459 STATUSMSG=@+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 379         v << MAXAWAY << " CHANMODES=b,k,l,psmnti NETWORK=" << Config->Network;
 380         Config->data005 = v.str();
 381         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 382 }
 383
 384 bool InspIRCd::UnloadModule(const char* filename)
 385 {
 386         std::string filename_str = filename;
 387         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 388         {
 389                 if (Config->module_names[j] == filename_str)
 390                 {
 391                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 392                         {
 393                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 394                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 395                                 return false;
 396                         }
 397                         /* Give the module a chance to tidy out all its metadata */
 398                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 399                         {
 400                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 401                         }
 402                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 403                         {
 404                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 405                         }
 406
 407                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 408
 409                         for(int t = 0; t < 255; t++)
 410                         {
 411                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 412                         }
 413
 414                         /* We have to renumber implement_lists after unload because the module numbers change!
 415                          */
 416                         for(int j2 = j; j2 < 254; j2++)
 417                         {
 418                                 for(int t = 0; t < 255; t++)
 419                                 {
 420                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 421                                 }
 422                         }
 423
 424                         // found the module
 425                         log(DEBUG,"Deleting module...");
 426                         erase_module(j);
 427                         log(DEBUG,"Erasing module entry...");
 428                         erase_factory(j);
 429                         log(DEBUG,"Removing dependent commands...");
 430                         Parser->RemoveCommands(filename);
 431                         log(DEFAULT,"Module %s unloaded",filename);
 432                         MODCOUNT--;
 433                         BuildISupport();
 434                         return true;
 435                 }
 436         }
 437         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 438         snprintf(MODERR,MAXBUF,"Module not loaded");
 439         return false;
 440 }
 441
 442 bool InspIRCd::LoadModule(const char* filename)
 443 {
 444         char modfile[MAXBUF];
 445 #ifdef STATIC_LINK
 446         strlcpy(modfile,filename,MAXBUF);
 447 #else
 448         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 449 #endif
 450         std::string filename_str = filename;
 451 #ifndef STATIC_LINK
 452 #ifndef IS_CYGWIN
 453         if (!DirValid(modfile))
 454         {
 455                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 456                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 457                 return false;
 458         }
 459 #endif
 460 #endif
 461         log(DEBUG,"Loading module: %s",modfile);
 462 #ifndef STATIC_LINK
 463         if (FileExists(modfile))
 464         {
 465 #endif
 466                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 467                 {
 468                         if (Config->module_names[j] == filename_str)
 469                         {
 470                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 471                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 472                                 return false;
 473                         }
 474                 }
 475                 ircd_module* a = new ircd_module(modfile);
 476                 factory[MODCOUNT+1] = a;
 477                 if (factory[MODCOUNT+1]->LastError())
 478                 {
 479                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 480                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 481                         return false;
 482                 }
 483                 if (factory[MODCOUNT+1]->factory)
 484                 {
 485                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 486                         modules[MODCOUNT+1] = m;
 487                         /* save the module and the module's classfactory, if
 488                          * this isnt done, random crashes can occur :/ */
 489                         Config->module_names.push_back(filename);
 490
 491                         char* x = &Config->implement_lists[MODCOUNT+1][0];
 492                         for(int t = 0; t < 255; t++)
 493                                 x[t] = 0;
 494
 495                         modules[MODCOUNT+1]->Implements(x);
 496
 497                         for(int t = 0; t < 255; t++)
 498                         {
 499                                 Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 500                                 if (Config->implement_lists[MODCOUNT+1][t])
 501                                 {
 502                                         log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 503                                 }
 504                         }
 505                 }
 506                 else
 507                 {
 508                         log(DEFAULT,"Unable to load %s",modfile);
 509                         snprintf(MODERR,MAXBUF,"Factory function failed!");
 510                         return false;
 511                 }
 512 #ifndef STATIC_LINK
 513         }
 514         else
 515         {
 516                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 517                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 518                 return false;
 519         }
 520 #endif
 521         MODCOUNT++;
 522         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 523         // now work out which modules, if any, want to move to the back of the queue,
 524         // and if they do, move them there.
 525         std::vector<std::string> put_to_back;
 526         std::vector<std::string> put_to_front;
 527         std::map<std::string,std::string> put_before;
 528         std::map<std::string,std::string> put_after;
 529         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 530         {
 531                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 532                 {
 533                         put_to_back.push_back(Config->module_names[j]);
 534                 }
 535                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 536                 {
 537                         put_to_front.push_back(Config->module_names[j]);
 538                 }
 539                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 540                 {
 541                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 542                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 543                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 544                 }
 545                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 546                 {
 547                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 548                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 549                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 550                 }
 551         }
 552         for (unsigned int j = 0; j < put_to_back.size(); j++)
 553         {
 554                 MoveToLast(put_to_back[j]);
 555         }
 556         for (unsigned int j = 0; j < put_to_front.size(); j++)
 557         {
 558                 MoveToFirst(put_to_front[j]);
 559         }
 560         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 561         {
 562                 MoveBefore(j->first,j->second);
 563         }
 564         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 565         {
 566                 MoveAfter(j->first,j->second);
 567         }
 568         BuildISupport();
 569         return true;
 570 }
 571
 572 int InspIRCd::Run()
 573 {
 574         bool expire_run = false;
 575         int activefds[MAX_DESCRIPTORS];
 576         int incomingSockfd;
 577         int in_port;
 578         userrec* cu = NULL;
 579         InspSocket* s = NULL;
 580         InspSocket* s_del = NULL;
 581         unsigned int numberactive;
 582         sockaddr_in sock_us;     // our port number
 583         socklen_t uslen;         // length of our port number
 584
 585         /* Until THIS point, ServerInstance == NULL */
 586
 587         LoadAllModules(this);
 588
 589         printf("\nInspIRCd is now running!\n");
 590
 591         if (!Config->nofork)
 592         {
 593                 freopen("/dev/null","w",stdout);
 594                 freopen("/dev/null","w",stderr);
 595         }
 596
 597         /* Add the listening sockets used for client inbound connections
 598          * to the socket engine
 599          */
 600         for (int count = 0; count < stats->BoundPortCount; count++)
 601                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 602
 603         WritePID(Config->PID);
 604
 605         /* main loop, this never returns */
 606         for (;;)
 607         {
 608                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 609                  * Once per loop iteration is pleanty.
 610                  */
 611                 OLDTIME = TIME;
 612                 TIME = time(NULL);
 613
 614                 /* Run background module timers every few seconds
 615                  * (the docs say modules shouldnt rely on accurate
 616                  * timing using this event, so we dont have to
 617                  * time this exactly).
 618                  */
 619                 if (((TIME % 8) == 0) && (!expire_run))
 620                 {
 621                         expire_lines();
 622                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 623                         expire_run = true;
 624                         continue;
 625                 }
 626                 else if ((TIME % 8) == 1)
 627                 {
 628                         expire_run = false;
 629                 }
 630
 631                 /* Once a second, do the background processing */
 632                 if (TIME != OLDTIME)
 633                         DoBackgroundUserStuff(TIME);
 634
 635                 /* Call the socket engine to wait on the active
 636                  * file descriptors. The socket engine has everything's
 637                  * descriptors in its list... dns, modules, users,
 638                  * servers... so its nice and easy, just one call.
 639                  */
 640                 if (!(numberactive = SE->Wait(activefds)))
 641                         continue;
 642
 643                 /**
 644                  * Now process each of the fd's. For users, we have a fast
 645                  * lookup table which can find a user by file descriptor, so
 646                  * processing them by fd isnt expensive. If we have a lot of
 647                  * listening ports or module sockets though, things could get
 648                  * ugly.
 649                  */
 650                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 651                 {
 652                         int socket_type = SE->GetType(activefds[activefd]);
 653                         switch (socket_type)
 654                         {
 655                                 case X_ESTAB_CLIENT:
 656
 657                                         cu = fd_ref_table[activefds[activefd]];
 658                                         if (cu)
 659                                                 ProcessUser(cu);
 660
 661                                 break;
 662
 663                                 case X_ESTAB_MODULE:
 664
 665                                         /* Process module-owned sockets.
 666                                          * Modules are encouraged to inherit their sockets from
 667                                          * InspSocket so we can process them neatly like this.
 668                                          */
 669                                         s = socket_ref[activefds[activefd]];
 670
 671                                         if ((s) && (!s->Poll()))
 672                                         {
 673                                                 log(DEBUG,"Socket poll returned false, close and bail");
 674                                                 SE->DelFd(s->GetFd());
 675                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 676                                                 {
 677                                                         s_del = (InspSocket*)*a;
 678                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 679                                                         {
 680                                                                 module_sockets.erase(a);
 681                                                                 break;
 682                                                         }
 683                                                 }
 684                                                 s->Close();
 685                                                 delete s;
 686                                         }
 687
 688                                 break;
 689
 690                                 case X_ESTAB_DNS:
 691
 692                                         /* When we are using single-threaded dns,
 693                                          * the sockets for dns end up in our mainloop.
 694                                          * When we are using multi-threaded dns,
 695                                          * each thread has its own basic poll() loop
 696                                          * within it, making them 'fire and forget'
 697                                          * and independent of the mainloop.
 698                                          */
 699 #ifndef THREADED_DNS
 700                                         dns_poll(activefds[activefd]);
 701 #endif
 702                                 break;
 703
 704                                 case X_LISTEN:
 705
 706                                         /* It's a listener */
 707                                         uslen = sizeof(sock_us);
 708                                         length = sizeof(client);
 709                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 710
 711                                         if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 712                                         {
 713                                                 in_port = ntohs(sock_us.sin_port);
 714                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
 715                                                 /* Years and years ago, we used to resolve here
 716                                                  * using gethostbyaddr(). That is sucky and we
 717                                                  * don't do that any more...
 718                                                  */
 719                                                 NonBlocking(incomingSockfd);
 720                                                 if (Config->GetIOHook(in_port))
 721                                                 {
 722                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 723                                                 }
 724                                                 stats->statsAccept++;
 725                                                 AddClient(incomingSockfd, in_port, false, client.sin_addr);
 726                                                 log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 727                                         }
 728                                         else
 729                                         {
 730                                                 log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 731                                                 shutdown(incomingSockfd,2);
 732                                                 close(incomingSockfd);
 733                                                 stats->statsRefused++;
 734                                         }
 735                                 break;
 736
 737                                 default:
 738                                         /* Something went wrong if we're in here.
 739                                          * In fact, so wrong, im not quite sure
 740                                          * what we would do, so for now, its going
 741                                          * to safely do bugger all.
 742                                          */
 743                                 break;
 744                         }
 745                 }
 746
 747         }
 748         /* This is never reached -- we hope! */
 749         return 0;
 750 }
 751
 752 /**********************************************************************************/
 753
 754 /**
 755  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 756  */
 757
 758 int main(int argc, char** argv)
 759 {
 760         ServerInstance = new InspIRCd(argc, argv);
 761         ServerInstance->Run();
 762         delete ServerInstance;
 763         return 0;
 764 }
 765