src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include <fcntl.h>
  25 #include <sys/errno.h>
  26 #include <sys/ioctl.h>
  27 #include <time.h>
  28 #include <string>
  29 #ifdef GCC3
  30 #include <ext/hash_map>
  31 #else
  32 #include <hash_map>
  33 #endif
  34 #include <map>
  35 #include <sstream>
  36 #include <vector>
  37 #include <deque>
  38 #ifdef THREADED_DNS
  39 #include <pthread.h>
  40 #endif
  41 #include "users.h"
  42 #include "ctables.h"
  43 #include "globals.h"
  44 #include "modules.h"
  45 #include "dynamic.h"
  46 #include "wildcard.h"
  47 #include "message.h"
  48 #include "mode.h"
  49 #include "commands.h"
  50 #include "xline.h"
  51 #include "inspstring.h"
  52 #include "dnsqueue.h"
  53 #include "helperfuncs.h"
  54 #include "hashcomp.h"
  55 #include "socketengine.h"
  56 #include "userprocess.h"
  57 #include "socket.h"
  58 #include "typedefs.h"
  59 #include "command_parse.h"
  60
  61 InspIRCd* ServerInstance;
  62
  63 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  64 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  65
  66 extern std::vector<Module*> modules;
  67 extern std::vector<ircd_module*> factory;
  68
  69 std::vector<InspSocket*> module_sockets;
  70 std::vector<userrec*> local_users;
  71
  72 extern int MODCOUNT;
  73 extern char LOG_FILE[MAXBUF];
  74 int openSockfd[MAXSOCKS];
  75 int yield_depth;
  76 sockaddr_in client,server;
  77 socklen_t length;
  78
  79 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  80
  81 time_t TIME = time(NULL), OLDTIME = time(NULL);
  82
  83 // This table references users by file descriptor.
  84 // its an array to make it VERY fast, as all lookups are referenced
  85 // by an integer, meaning there is no need for a scan/search operation.
  86 userrec* fd_ref_table[MAX_DESCRIPTORS];
  87
  88 Server* MyServer = new Server;
  89 ServerConfig *Config = new ServerConfig;
  90
  91 user_hash clientlist;
  92 chan_hash chanlist;
  93 whowas_hash whowas;
  94 servernamelist servernames;
  95 char lowermap[255];
  96
  97 void AddServerName(std::string servername)
  98 {
  99         log(DEBUG,"Adding server name: %s",servername.c_str());
 100         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 101         {
 102                 if (*a == servername)
 103                         return;
 104         }
 105         servernames.push_back(servername);
 106 }
 107
 108 const char* FindServerNamePtr(std::string servername)
 109 {
 110         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 111         {
 112                 if (*a == servername)
 113                         return a->c_str();
 114         }
 115         AddServerName(servername);
 116         return FindServerNamePtr(servername);
 117 }
 118
 119 bool FindServerName(std::string servername)
 120 {
 121         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 122         {
 123                 if (*a == servername)
 124                         return true;
 125         }
 126         return false;
 127 }
 128
 129 std::string InspIRCd::GetRevision()
 130 {
 131         return REVISION;
 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         *LOG_FILE = 0;
 163         if (argc > 1) {
 164                 for (int i = 1; i < argc; i++)
 165                 {
 166                         if (!strcmp(argv[i],"-nofork")) {
 167                                 Config->nofork = true;
 168                         }
 169                         if (!strcmp(argv[i],"-wait")) {
 170                                 sleep(6);
 171                         }
 172                         if (!strcmp(argv[i],"-nolimit")) {
 173                                 Config->unlimitcore = true;
 174                         }
 175                         if (!strcmp(argv[i],"-logfile")) {
 176                                 if (argc > i+1)
 177                                 {
 178                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 179                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 180                                 }
 181                                 else
 182                                 {
 183                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 184                                         Exit(ERROR);
 185                                 }
 186                         }
 187                 }
 188         }
 189
 190         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 191
 192         this->MakeLowerMap();
 193
 194         OpenLog(argv, argc);
 195         Config->ClearStack();
 196         Config->Read(true,NULL);
 197         CheckRoot();
 198         this->ModeGrok = new ModeParser();
 199         this->Parser = new CommandParser();
 200         this->stats = new serverstats();
 201         AddServerName(Config->ServerName);
 202         CheckDie();
 203         stats->BoundPortCount = BindPorts();
 204
 205         for(int t = 0; t < 255; t++)
 206                 Config->global_implementation[t] = 0;
 207
 208         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 209
 210         printf("\n");
 211         SetSignals();
 212         if (!Config->nofork)
 213         {
 214                 if (DaemonSeed() == ERROR)
 215                 {
 216                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 217                         Exit(ERROR);
 218                 }
 219         }
 220
 221         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 222          * initialize the socket engine.
 223          */
 224         SE = new SocketEngine();
 225
 226         /* We must load the modules AFTER initializing the socket engine, now */
 227
 228         return;
 229 }
 230
 231 std::string InspIRCd::GetVersionString()
 232 {
 233         char versiondata[MAXBUF];
 234 #ifdef THREADED_DNS
 235         char dnsengine[] = "multithread";
 236 #else
 237         char dnsengine[] = "singlethread";
 238 #endif
 239         if (*Config->CustomVersion)
 240         {
 241                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 242         }
 243         else
 244         {
 245                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 246         }
 247         return versiondata;
 248 }
 249
 250 char* InspIRCd::ModuleError()
 251 {
 252         return MODERR;
 253 }
 254
 255 void InspIRCd::erase_factory(int j)
 256 {
 257         int v = 0;
 258         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 259         {
 260                 if (v == j)
 261                 {
 262                         factory.erase(t);
 263                         factory.push_back(NULL);
 264                         return;
 265                 }
 266                 v++;
 267         }
 268 }
 269
 270 void InspIRCd::erase_module(int j)
 271 {
 272         int v1 = 0;
 273         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 274         {
 275                 if (v1 == j)
 276                 {
 277                         delete *m;
 278                         modules.erase(m);
 279                         modules.push_back(NULL);
 280                         break;
 281                 }
 282                 v1++;
 283         }
 284         int v2 = 0;
 285         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 286         {
 287                 if (v2 == j)
 288                 {
 289                        Config->module_names.erase(v);
 290                        break;
 291                 }
 292                 v2++;
 293         }
 294
 295 }
 296
 297 void InspIRCd::MoveTo(std::string modulename,int slot)
 298 {
 299         unsigned int v2 = 256;
 300         log(DEBUG,"Moving %s to slot %d",modulename.c_str(),slot);
 301         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 302         {
 303                 if (Config->module_names[v] == modulename)
 304                 {
 305                         // found an instance, swap it with the item at MODCOUNT
 306                         v2 = v;
 307                         break;
 308                 }
 309         }
 310         if (v2 == (unsigned int)slot)
 311         {
 312                 log(DEBUG,"Item %s already in slot %d!",modulename.c_str(),slot);
 313         }
 314         else if (v2 < 256)
 315         {
 316                 // Swap the module names over
 317                 Config->module_names[v2] = Config->module_names[slot];
 318                 Config->module_names[slot] = modulename;
 319                 // now swap the module factories
 320                 ircd_module* temp = factory[v2];
 321                 factory[v2] = factory[slot];
 322                 factory[slot] = temp;
 323                 // now swap the module objects
 324                 Module* temp_module = modules[v2];
 325                 modules[v2] = modules[slot];
 326                 modules[slot] = temp_module;
 327                 // now swap the implement lists (we dont
 328                 // need to swap the global or recount it)
 329                 for (int n = 0; n < 255; n++)
 330                 {
 331                         char x = Config->implement_lists[v2][n];
 332                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 333                         Config->implement_lists[slot][n] = x;
 334                 }
 335                 log(DEBUG,"Moved %s to slot successfully",modulename.c_str());
 336         }
 337         else
 338         {
 339                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 340         }
 341 }
 342
 343 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 344 {
 345         log(DEBUG,"Move %s after %s...",modulename.c_str(),after.c_str());
 346         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 347         {
 348                 if (Config->module_names[v] == after)
 349                 {
 350                         MoveTo(modulename, v);
 351                         return;
 352                 }
 353         }
 354 }
 355
 356 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 357 {
 358         log(DEBUG,"Move %s before %s...",modulename.c_str(),before.c_str());
 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                                 {
 514                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 515                                         if (Config->implement_lists[MODCOUNT+1][t])
 516                                         {
 517                                                 log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 518                                         }
 519                                 }
 520                         }
 521                         else
 522                         {
 523                                 log(DEFAULT,"Unable to load %s",modfile);
 524                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 525                                 return false;
 526                         }
 527                 }
 528                 catch (ModuleException& modexcept)
 529                 {
 530                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 531                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 532                         return false;
 533                 }
 534 #ifndef STATIC_LINK
 535         }
 536         else
 537         {
 538                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 539                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 540                 return false;
 541         }
 542 #endif
 543         MODCOUNT++;
 544         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 545         // now work out which modules, if any, want to move to the back of the queue,
 546         // and if they do, move them there.
 547         std::vector<std::string> put_to_back;
 548         std::vector<std::string> put_to_front;
 549         std::map<std::string,std::string> put_before;
 550         std::map<std::string,std::string> put_after;
 551         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 552         {
 553                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 554                 {
 555                         put_to_back.push_back(Config->module_names[j]);
 556                 }
 557                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 558                 {
 559                         put_to_front.push_back(Config->module_names[j]);
 560                 }
 561                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 562                 {
 563                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 564                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 565                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 566                 }
 567                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 568                 {
 569                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 570                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 571                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 572                 }
 573         }
 574         for (unsigned int j = 0; j < put_to_back.size(); j++)
 575         {
 576                 MoveToLast(put_to_back[j]);
 577         }
 578         for (unsigned int j = 0; j < put_to_front.size(); j++)
 579         {
 580                 MoveToFirst(put_to_front[j]);
 581         }
 582         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 583         {
 584                 MoveBefore(j->first,j->second);
 585         }
 586         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 587         {
 588                 MoveAfter(j->first,j->second);
 589         }
 590         BuildISupport();
 591         return true;
 592 }
 593
 594 void InspIRCd::DoOneIteration(bool process_module_sockets)
 595 {
 596         int activefds[MAX_DESCRIPTORS];
 597         int incomingSockfd;
 598         int in_port;
 599         userrec* cu = NULL;
 600         InspSocket* s = NULL;
 601         InspSocket* s_del = NULL;
 602         unsigned int numberactive;
 603         sockaddr_in sock_us;     // our port number
 604         socklen_t uslen;         // length of our port number
 605
 606         if (yield_depth > 3)
 607                 return;
 608
 609         yield_depth++;
 610
 611         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 612          * Once per loop iteration is pleanty.
 613          */
 614         OLDTIME = TIME;
 615         TIME = time(NULL);
 616
 617         /* Run background module timers every few seconds
 618          * (the docs say modules shouldnt rely on accurate
 619          * timing using this event, so we dont have to
 620          * time this exactly).
 621          */
 622         if (((TIME % 5) == 0) && (!expire_run))
 623         {
 624                 expire_lines();
 625                 if (process_module_sockets)
 626                 {
 627                         /* Fix by brain - the addition of DoOneIteration means that this
 628                          * can end up getting called recursively in the following pattern:
 629                          *
 630                          * m_spanningtree DoPingChecks
 631                          * (server pings out and is squit)
 632                          * (squit causes call to DoOneIteration)
 633                          * DoOneIteration enters here
 634                          * calls DoBackground timer
 635                          * enters m_spanningtree DoPingChecks... see step 1.
 636                          *
 637                          * This should do the job and fix the bug.
 638                          */
 639                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 640                 }
 641                 TickMissedTimers(TIME);
 642                 expire_run = true;
 643                 yield_depth--;
 644                 return;
 645         }
 646         else if ((TIME % 5) == 1)
 647         {
 648                 expire_run = false;
 649         }
 650
 651         /* Once a second, do the background processing */
 652         if (TIME != OLDTIME)
 653         {
 654                 if (TIME < OLDTIME)
 655                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 656                 DoBackgroundUserStuff(TIME);
 657         }
 658
 659         /* Process timeouts on module sockets each time around
 660          * the loop. There shouldnt be many module sockets, at
 661          * most, 20 or so, so this won't be much of a performance
 662          * hit at all.
 663          */
 664         if (process_module_sockets)
 665                 DoSocketTimeouts(TIME);
 666
 667         TickTimers(TIME);
 668
 669         /* Call the socket engine to wait on the active
 670          * file descriptors. The socket engine has everything's
 671          * descriptors in its list... dns, modules, users,
 672          * servers... so its nice and easy, just one call.
 673          */
 674         if (!(numberactive = SE->Wait(activefds)))
 675         {
 676                 yield_depth--;
 677                 return;
 678         }
 679
 680         /**
 681          * Now process each of the fd's. For users, we have a fast
 682          * lookup table which can find a user by file descriptor, so
 683          * processing them by fd isnt expensive. If we have a lot of
 684          * listening ports or module sockets though, things could get
 685          * ugly.
 686          */
 687         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 688         {
 689                 int socket_type = SE->GetType(activefds[activefd]);
 690                 switch (socket_type)
 691                 {
 692                         case X_ESTAB_CLIENT:
 693
 694                                 cu = fd_ref_table[activefds[activefd]];
 695                                 if (cu)
 696                                         ProcessUser(cu);
 697
 698                         break;
 699
 700                         case X_ESTAB_MODULE:
 701
 702                                 if (!process_module_sockets)
 703                                         break;
 704
 705                                 /* Process module-owned sockets.
 706                                  * Modules are encouraged to inherit their sockets from
 707                                  * InspSocket so we can process them neatly like this.
 708                                  */
 709                                 s = socket_ref[activefds[activefd]];
 710
 711                                 if ((s) && (!s->Poll()))
 712                                 {
 713                                         log(DEBUG,"Socket poll returned false, close and bail");
 714                                         SE->DelFd(s->GetFd());
 715                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 716                                         {
 717                                                 s_del = (InspSocket*)*a;
 718                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 719                                                 {
 720                                                         module_sockets.erase(a);
 721                                                         break;
 722                                                 }
 723                                         }
 724                                         s->Close();
 725                                         delete s;
 726                                 }
 727                         break;
 728
 729                         case X_ESTAB_DNS:
 730                                 /* When we are using single-threaded dns,
 731                                  * the sockets for dns end up in our mainloop.
 732                                  * When we are using multi-threaded dns,
 733                                  * each thread has its own basic poll() loop
 734                                  * within it, making them 'fire and forget'
 735                                  * and independent of the mainloop.
 736                                  */
 737 #ifndef THREADED_DNS
 738                                 dns_poll(activefds[activefd]);
 739 #endif
 740                         break;
 741
 742                         case X_LISTEN:
 743
 744                                 /* It's a listener */
 745                                 uslen = sizeof(sock_us);
 746                                 length = sizeof(client);
 747                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 748
 749                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 750                                 {
 751                                         in_port = ntohs(sock_us.sin_port);
 752                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 753                                         /* Years and years ago, we used to resolve here
 754                                          * using gethostbyaddr(). That is sucky and we
 755                                          * don't do that any more...
 756                                          */
 757                                         NonBlocking(incomingSockfd);
 758                                         if (Config->GetIOHook(in_port))
 759                                         {
 760                                                 try
 761                                                 {
 762                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 763                                                 }
 764                                                 catch (ModuleException& modexcept)
 765                                                 {
 766                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason()); \
 767                                                 }
 768                                         }
 769                                         stats->statsAccept++;
 770                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 771                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 772                                 }
 773                                 else
 774                                 {
 775                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 776                                         shutdown(incomingSockfd,2);
 777                                         close(incomingSockfd);
 778                                         stats->statsRefused++;
 779                                 }
 780                         break;
 781
 782                         default:
 783                                 /* Something went wrong if we're in here.
 784                                  * In fact, so wrong, im not quite sure
 785                                  * what we would do, so for now, its going
 786                                  * to safely do bugger all.
 787                                  */
 788                         break;
 789                 }
 790         }
 791         yield_depth--;
 792 }
 793
 794 int InspIRCd::Run()
 795 {
 796         /* Until THIS point, ServerInstance == NULL */
 797
 798         LoadAllModules(this);
 799
 800         printf("\nInspIRCd is now running!\n");
 801
 802         if (!Config->nofork)
 803         {
 804                 freopen("/dev/null","w",stdout);
 805                 freopen("/dev/null","w",stderr);
 806         }
 807
 808         /* Add the listening sockets used for client inbound connections
 809          * to the socket engine
 810          */
 811         for (int count = 0; count < stats->BoundPortCount; count++)
 812                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 813
 814         WritePID(Config->PID);
 815
 816         /* main loop, this never returns */
 817         expire_run = false;
 818         yield_depth = 0;
 819
 820         while (true)
 821         {
 822                 DoOneIteration(true);
 823         }
 824         /* This is never reached -- we hope! */
 825         return 0;
 826 }
 827
 828 /**********************************************************************************/
 829
 830 /**
 831  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 832  */
 833
 834 int main(int argc, char** argv)
 835 {
 836         ServerInstance = new InspIRCd(argc, argv);
 837         ServerInstance->Run();
 838         delete ServerInstance;
 839         return 0;
 840 }
 841