src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include <fcntl.h>
  25 #include <sys/errno.h>
  26 #include <sys/ioctl.h>
  27 #include <time.h>
  28 #include <string>
  29 #ifdef GCC3
  30 #include <ext/hash_map>
  31 #else
  32 #include <hash_map>
  33 #endif
  34 #include <map>
  35 #include <sstream>
  36 #include <vector>
  37 #include <deque>
  38 #ifdef THREADED_DNS
  39 #include <pthread.h>
  40 #endif
  41 #include "users.h"
  42 #include "ctables.h"
  43 #include "globals.h"
  44 #include "modules.h"
  45 #include "dynamic.h"
  46 #include "wildcard.h"
  47 #include "message.h"
  48 #include "mode.h"
  49 #include "commands.h"
  50 #include "xline.h"
  51 #include "inspstring.h"
  52 #include "dnsqueue.h"
  53 #include "helperfuncs.h"
  54 #include "hashcomp.h"
  55 #include "socketengine.h"
  56 #include "userprocess.h"
  57 #include "socket.h"
  58 #include "typedefs.h"
  59 #include "command_parse.h"
  60
  61 InspIRCd* ServerInstance;
  62
  63 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  64 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  65
  66 extern std::vector<Module*> modules;
  67 extern std::vector<ircd_module*> factory;
  68
  69 std::vector<InspSocket*> module_sockets;
  70 std::vector<userrec*> local_users;
  71
  72 extern int MODCOUNT;
  73 int openSockfd[MAXSOCKS];
  74 sockaddr_in client,server;
  75 socklen_t length;
  76
  77 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  78
  79 time_t TIME = time(NULL), OLDTIME = time(NULL);
  80
  81 // This table references users by file descriptor.
  82 // its an array to make it VERY fast, as all lookups are referenced
  83 // by an integer, meaning there is no need for a scan/search operation.
  84 userrec* fd_ref_table[MAX_DESCRIPTORS];
  85
  86 Server* MyServer = new Server;
  87 ServerConfig *Config = new ServerConfig;
  88
  89 user_hash clientlist;
  90 chan_hash chanlist;
  91 whowas_hash whowas;
  92 servernamelist servernames;
  93 char lowermap[255];
  94
  95 void AddServerName(std::string servername)
  96 {
  97         log(DEBUG,"Adding server name: %s",servername.c_str());
  98         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
  99         {
 100                 if (*a == servername)
 101                         return;
 102         }
 103         servernames.push_back(servername);
 104 }
 105
 106 const char* FindServerNamePtr(std::string servername)
 107 {
 108         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 109         {
 110                 if (*a == servername)
 111                         return a->c_str();
 112         }
 113         AddServerName(servername);
 114         return FindServerNamePtr(servername);
 115 }
 116
 117 bool FindServerName(std::string servername)
 118 {
 119         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 120         {
 121                 if (*a == servername)
 122                         return true;
 123         }
 124         return false;
 125 }
 126
 127 std::string InspIRCd::GetRevision()
 128 {
 129         /* w00t got me to replace a bunch of strtok_r
 130          * with something nicer, so i did this. Its the
 131          * same thing really, only in C++. It places the
 132          * text into a std::stringstream which is a readable
 133          * and writeable buffer stream, and then pops two
 134          * words off it, space delimited. Because it reads
 135          * into the same variable twice, the first word
 136          * is discarded, and the second one returned.
 137          */
 138         std::stringstream Revision("$Revision$");
 139         std::string single;
 140         Revision >> single >> single;
 141         return single;
 142 }
 143
 144 void InspIRCd::MakeLowerMap()
 145 {
 146         // initialize the lowercase mapping table
 147         for (unsigned int cn = 0; cn < 256; cn++)
 148                 lowermap[cn] = cn;
 149         // lowercase the uppercase chars
 150         for (unsigned int cn = 65; cn < 91; cn++)
 151                 lowermap[cn] = tolower(cn);
 152         // now replace the specific chars for scandanavian comparison
 153         lowermap[(unsigned)'['] = '{';
 154         lowermap[(unsigned)']'] = '}';
 155         lowermap[(unsigned)'\\'] = '|';
 156 }
 157
 158 InspIRCd::InspIRCd(int argc, char** argv)
 159 {
 160         Start();
 161         module_sockets.clear();
 162         this->startup_time = time(NULL);
 163         srand(time(NULL));
 164         log(DEBUG,"*** InspIRCd starting up!");
 165         if (!FileExists(CONFIG_FILE))
 166         {
 167                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 168                 log(DEFAULT,"main: no config");
 169                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 170                 Exit(ERROR);
 171         }
 172         if (argc > 1) {
 173                 for (int i = 1; i < argc; i++)
 174                 {
 175                         if (!strcmp(argv[i],"-nofork")) {
 176                                 Config->nofork = true;
 177                         }
 178                         if (!strcmp(argv[i],"-wait")) {
 179                                 sleep(6);
 180                         }
 181                         if (!strcmp(argv[i],"-nolimit")) {
 182                                 Config->unlimitcore = true;
 183                         }
 184                 }
 185         }
 186
 187         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 188
 189         this->MakeLowerMap();
 190
 191         OpenLog(argv, argc);
 192         Config->ClearStack();
 193         Config->Read(true,NULL);
 194         CheckRoot();
 195         this->ModeGrok = new ModeParser();
 196         this->Parser = new CommandParser();
 197         this->stats = new serverstats();
 198         AddServerName(Config->ServerName);
 199         CheckDie();
 200         stats->BoundPortCount = BindPorts();
 201
 202         for(int t = 0; t < 255; t++)
 203                 Config->global_implementation[t] = 0;
 204
 205         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 206
 207         printf("\n");
 208         SetSignals();
 209         if (!Config->nofork)
 210         {
 211                 if (DaemonSeed() == ERROR)
 212                 {
 213                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 214                         Exit(ERROR);
 215                 }
 216         }
 217
 218         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 219          * initialize the socket engine.
 220          */
 221         SE = new SocketEngine();
 222
 223         /* We must load the modules AFTER initializing the socket engine, now */
 224
 225         return;
 226 }
 227
 228 std::string InspIRCd::GetVersionString()
 229 {
 230         char versiondata[MAXBUF];
 231 #ifdef THREADED_DNS
 232         char dnsengine[] = "multithread";
 233 #else
 234         char dnsengine[] = "singlethread";
 235 #endif
 236         if (*Config->CustomVersion)
 237         {
 238                 snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s",VERSION,GetRevision().c_str(),Config->ServerName,Config->CustomVersion);
 239         }
 240         else
 241         {
 242                 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);
 243         }
 244         return versiondata;
 245 }
 246
 247 char* InspIRCd::ModuleError()
 248 {
 249         return MODERR;
 250 }
 251
 252 void InspIRCd::erase_factory(int j)
 253 {
 254         int v = 0;
 255         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 256         {
 257                 if (v == j)
 258                 {
 259                         factory.erase(t);
 260                         factory.push_back(NULL);
 261                         return;
 262                 }
 263                 v++;
 264         }
 265 }
 266
 267 void InspIRCd::erase_module(int j)
 268 {
 269         int v1 = 0;
 270         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 271         {
 272                 if (v1 == j)
 273                 {
 274                         delete *m;
 275                         modules.erase(m);
 276                         modules.push_back(NULL);
 277                         break;
 278                 }
 279                 v1++;
 280         }
 281         int v2 = 0;
 282         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 283         {
 284                 if (v2 == j)
 285                 {
 286                        Config->module_names.erase(v);
 287                        break;
 288                 }
 289                 v2++;
 290         }
 291
 292 }
 293
 294 void InspIRCd::MoveTo(std::string modulename,int slot)
 295 {
 296         unsigned int v2 = 256;
 297         log(DEBUG,"Moving %s to slot %d",modulename.c_str(),slot);
 298         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 299         {
 300                 if (Config->module_names[v] == modulename)
 301                 {
 302                         // found an instance, swap it with the item at MODCOUNT
 303                         v2 = v;
 304                         break;
 305                 }
 306         }
 307         if (v2 == (unsigned int)slot)
 308         {
 309                 log(DEBUG,"Item %s already in slot %d!",modulename.c_str(),slot);
 310         }
 311         else if (v2 < 256)
 312         {
 313                 // Swap the module names over
 314                 Config->module_names[v2] = Config->module_names[slot];
 315                 Config->module_names[slot] = modulename;
 316                 // now swap the module factories
 317                 ircd_module* temp = factory[v2];
 318                 factory[v2] = factory[slot];
 319                 factory[slot] = temp;
 320                 // now swap the module objects
 321                 Module* temp_module = modules[v2];
 322                 modules[v2] = modules[slot];
 323                 modules[slot] = temp_module;
 324                 // now swap the implement lists (we dont
 325                 // need to swap the global or recount it)
 326                 for (int n = 0; n < 255; n++)
 327                 {
 328                         char x = Config->implement_lists[v2][n];
 329                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 330                         Config->implement_lists[slot][n] = x;
 331                 }
 332                 log(DEBUG,"Moved %s to slot successfully",modulename.c_str());
 333         }
 334         else
 335         {
 336                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 337         }
 338 }
 339
 340 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 341 {
 342         log(DEBUG,"Move %s after %s...",modulename.c_str(),after.c_str());
 343         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 344         {
 345                 if (Config->module_names[v] == after)
 346                 {
 347                         MoveTo(modulename, v);
 348                         return;
 349                 }
 350         }
 351 }
 352
 353 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 354 {
 355         log(DEBUG,"Move %s before %s...",modulename.c_str(),before.c_str());
 356         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 357         {
 358                 if (Config->module_names[v] == before)
 359                 {
 360                         if (v > 0)
 361                         {
 362                                 MoveTo(modulename, v-1);
 363                         }
 364                         else
 365                         {
 366                                 MoveTo(modulename, v);
 367                         }
 368                         return;
 369                 }
 370         }
 371 }
 372
 373 void InspIRCd::MoveToFirst(std::string modulename)
 374 {
 375         MoveTo(modulename,0);
 376 }
 377
 378 void InspIRCd::MoveToLast(std::string modulename)
 379 {
 380         MoveTo(modulename,MODCOUNT);
 381 }
 382
 383 void InspIRCd::BuildISupport()
 384 {
 385         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 386         std::stringstream v;
 387         v << "WALLCHOPS MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 NICKLEN=" << NICKMAX-1;
 388         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 389         v << MAXAWAY << " CHANMODES=b,k,l,psmnti NETWORK=" << Config->Network;
 390         Config->data005 = v.str();
 391         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 392 }
 393
 394 bool InspIRCd::UnloadModule(const char* filename)
 395 {
 396         std::string filename_str = filename;
 397         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 398         {
 399                 if (Config->module_names[j] == filename_str)
 400                 {
 401                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 402                         {
 403                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 404                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 405                                 return false;
 406                         }
 407                         /* Give the module a chance to tidy out all its metadata */
 408                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 409                         {
 410                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 411                         }
 412                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 413                         {
 414                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 415                         }
 416
 417                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 418
 419                         for(int t = 0; t < 255; t++)
 420                         {
 421                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 422                         }
 423
 424                         /* We have to renumber implement_lists after unload because the module numbers change!
 425                          */
 426                         for(int j2 = j; j2 < 254; j2++)
 427                         {
 428                                 for(int t = 0; t < 255; t++)
 429                                 {
 430                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 431                                 }
 432                         }
 433
 434                         // found the module
 435                         log(DEBUG,"Deleting module...");
 436                         erase_module(j);
 437                         log(DEBUG,"Erasing module entry...");
 438                         erase_factory(j);
 439                         log(DEBUG,"Removing dependent commands...");
 440                         Parser->RemoveCommands(filename);
 441                         log(DEFAULT,"Module %s unloaded",filename);
 442                         MODCOUNT--;
 443                         BuildISupport();
 444                         return true;
 445                 }
 446         }
 447         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 448         snprintf(MODERR,MAXBUF,"Module not loaded");
 449         return false;
 450 }
 451
 452 bool InspIRCd::LoadModule(const char* filename)
 453 {
 454         char modfile[MAXBUF];
 455 #ifdef STATIC_LINK
 456         strlcpy(modfile,filename,MAXBUF);
 457 #else
 458         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 459 #endif
 460         std::string filename_str = filename;
 461 #ifndef STATIC_LINK
 462 #ifndef IS_CYGWIN
 463         if (!DirValid(modfile))
 464         {
 465                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 466                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 467                 return false;
 468         }
 469 #endif
 470 #endif
 471         log(DEBUG,"Loading module: %s",modfile);
 472 #ifndef STATIC_LINK
 473         if (FileExists(modfile))
 474         {
 475 #endif
 476                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 477                 {
 478                         if (Config->module_names[j] == filename_str)
 479                         {
 480                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 481                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 482                                 return false;
 483                         }
 484                 }
 485                 ircd_module* a = new ircd_module(modfile);
 486                 factory[MODCOUNT+1] = a;
 487                 if (factory[MODCOUNT+1]->LastError())
 488                 {
 489                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 490                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 491                         return false;
 492                 }
 493                 if (factory[MODCOUNT+1]->factory)
 494                 {
 495                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 496                         modules[MODCOUNT+1] = m;
 497                         /* save the module and the module's classfactory, if
 498                          * this isnt done, random crashes can occur :/ */
 499                         Config->module_names.push_back(filename);
 500
 501                         char* x = &Config->implement_lists[MODCOUNT+1][0];
 502                         for(int t = 0; t < 255; t++)
 503                                 x[t] = 0;
 504
 505                         modules[MODCOUNT+1]->Implements(x);
 506
 507                         for(int t = 0; t < 255; t++)
 508                         {
 509                                 Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 510                                 if (Config->implement_lists[MODCOUNT+1][t])
 511                                 {
 512                                         log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 513                                 }
 514                         }
 515                 }
 516                 else
 517                 {
 518                         log(DEFAULT,"Unable to load %s",modfile);
 519                         snprintf(MODERR,MAXBUF,"Factory function failed!");
 520                         return false;
 521                 }
 522 #ifndef STATIC_LINK
 523         }
 524         else
 525         {
 526                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 527                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 528                 return false;
 529         }
 530 #endif
 531         MODCOUNT++;
 532         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 533         // now work out which modules, if any, want to move to the back of the queue,
 534         // and if they do, move them there.
 535         std::vector<std::string> put_to_back;
 536         std::vector<std::string> put_to_front;
 537         std::map<std::string,std::string> put_before;
 538         std::map<std::string,std::string> put_after;
 539         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 540         {
 541                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 542                 {
 543                         put_to_back.push_back(Config->module_names[j]);
 544                 }
 545                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 546                 {
 547                         put_to_front.push_back(Config->module_names[j]);
 548                 }
 549                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 550                 {
 551                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 552                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 553                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 554                 }
 555                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 556                 {
 557                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 558                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 559                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 560                 }
 561         }
 562         for (unsigned int j = 0; j < put_to_back.size(); j++)
 563         {
 564                 MoveToLast(put_to_back[j]);
 565         }
 566         for (unsigned int j = 0; j < put_to_front.size(); j++)
 567         {
 568                 MoveToFirst(put_to_front[j]);
 569         }
 570         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 571         {
 572                 MoveBefore(j->first,j->second);
 573         }
 574         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 575         {
 576                 MoveAfter(j->first,j->second);
 577         }
 578         BuildISupport();
 579         return true;
 580 }
 581
 582 int InspIRCd::Run()
 583 {
 584         bool expire_run = false;
 585         int activefds[MAX_DESCRIPTORS];
 586         int incomingSockfd;
 587         int in_port;
 588         userrec* cu = NULL;
 589         InspSocket* s = NULL;
 590         InspSocket* s_del = NULL;
 591         unsigned int numberactive;
 592         sockaddr_in sock_us;     // our port number
 593         socklen_t uslen;         // length of our port number
 594
 595         /* Until THIS point, ServerInstance == NULL */
 596
 597         LoadAllModules(this);
 598
 599         printf("\nInspIRCd is now running!\n");
 600
 601         if (!Config->nofork)
 602         {
 603                 freopen("/dev/null","w",stdout);
 604                 freopen("/dev/null","w",stderr);
 605         }
 606
 607         /* Add the listening sockets used for client inbound connections
 608          * to the socket engine
 609          */
 610         for (int count = 0; count < stats->BoundPortCount; count++)
 611                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 612
 613         WritePID(Config->PID);
 614
 615         /* main loop, this never returns */
 616         for (;;)
 617         {
 618                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 619                  * Once per loop iteration is pleanty.
 620                  */
 621                 OLDTIME = TIME;
 622                 TIME = time(NULL);
 623
 624                 /* Run background module timers every few seconds
 625                  * (the docs say modules shouldnt rely on accurate
 626                  * timing using this event, so we dont have to
 627                  * time this exactly).
 628                  */
 629                 if (((TIME % 8) == 0) && (!expire_run))
 630                 {
 631                         expire_lines();
 632                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 633                         expire_run = true;
 634                         continue;
 635                 }
 636                 else if ((TIME % 8) == 1)
 637                 {
 638                         expire_run = false;
 639                 }
 640
 641                 /* Once a second, do the background processing */
 642                 if (TIME != OLDTIME)
 643                         DoBackgroundUserStuff(TIME);
 644
 645                 /* Call the socket engine to wait on the active
 646                  * file descriptors. The socket engine has everything's
 647                  * descriptors in its list... dns, modules, users,
 648                  * servers... so its nice and easy, just one call.
 649                  */
 650                 if (!(numberactive = SE->Wait(activefds)))
 651                         continue;
 652
 653                 /**
 654                  * Now process each of the fd's. For users, we have a fast
 655                  * lookup table which can find a user by file descriptor, so
 656                  * processing them by fd isnt expensive. If we have a lot of
 657                  * listening ports or module sockets though, things could get
 658                  * ugly.
 659                  */
 660                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 661                 {
 662                         int socket_type = SE->GetType(activefds[activefd]);
 663                         switch (socket_type)
 664                         {
 665                                 case X_ESTAB_CLIENT:
 666
 667                                         cu = fd_ref_table[activefds[activefd]];
 668                                         if (cu)
 669                                                 ProcessUser(cu);
 670
 671                                 break;
 672
 673                                 case X_ESTAB_MODULE:
 674
 675                                         /* Process module-owned sockets.
 676                                          * Modules are encouraged to inherit their sockets from
 677                                          * InspSocket so we can process them neatly like this.
 678                                          */
 679                                         s = socket_ref[activefds[activefd]];
 680
 681                                         if ((s) && (!s->Poll()))
 682                                         {
 683                                                 log(DEBUG,"Socket poll returned false, close and bail");
 684                                                 SE->DelFd(s->GetFd());
 685                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 686                                                 {
 687                                                         s_del = (InspSocket*)*a;
 688                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 689                                                         {
 690                                                                 module_sockets.erase(a);
 691                                                                 break;
 692                                                         }
 693                                                 }
 694                                                 s->Close();
 695                                                 delete s;
 696                                         }
 697
 698                                 break;
 699
 700                                 case X_ESTAB_DNS:
 701
 702                                         /* When we are using single-threaded dns,
 703                                          * the sockets for dns end up in our mainloop.
 704                                          * When we are using multi-threaded dns,
 705                                          * each thread has its own basic poll() loop
 706                                          * within it, making them 'fire and forget'
 707                                          * and independent of the mainloop.
 708                                          */
 709 #ifndef THREADED_DNS
 710                                         dns_poll(activefds[activefd]);
 711 #endif
 712                                 break;
 713
 714                                 case X_LISTEN:
 715
 716                                         /* It's a listener */
 717                                         uslen = sizeof(sock_us);
 718                                         length = sizeof(client);
 719                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 720
 721                                         if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 722                                         {
 723                                                 in_port = ntohs(sock_us.sin_port);
 724                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
 725                                                 /* Years and years ago, we used to resolve here
 726                                                  * using gethostbyaddr(). That is sucky and we
 727                                                  * don't do that any more...
 728                                                  */
 729                                                 NonBlocking(incomingSockfd);
 730                                                 if (Config->GetIOHook(in_port))
 731                                                 {
 732                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 733                                                 }
 734                                                 stats->statsAccept++;
 735                                                 AddClient(incomingSockfd, in_port, false, client.sin_addr);
 736                                                 log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 737                                         }
 738                                         else
 739                                         {
 740                                                 log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 741                                                 shutdown(incomingSockfd,2);
 742                                                 close(incomingSockfd);
 743                                                 stats->statsRefused++;
 744                                         }
 745                                 break;
 746
 747                                 default:
 748                                         /* Something went wrong if we're in here.
 749                                          * In fact, so wrong, im not quite sure
 750                                          * what we would do, so for now, its going
 751                                          * to safely do bugger all.
 752                                          */
 753                                 break;
 754                         }
 755                 }
 756
 757         }
 758         /* This is never reached -- we hope! */
 759         return 0;
 760 }
 761
 762 /**********************************************************************************/
 763
 764 /**
 765  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 766  */
 767
 768 int main(int argc, char** argv)
 769 {
 770         ServerInstance = new InspIRCd(argc, argv);
 771         ServerInstance->Run();
 772         delete ServerInstance;
 773         return 0;
 774 }
 775