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 #include "inspircd_config.h"
  20 #include "inspircd.h"
  21 #include "configreader.h"
  22 #include <fcntl.h>
  23 #include <sys/errno.h>
  24 #include <sys/ioctl.h>
  25 #include <time.h>
  26 #include <string>
  27 #include <exception>
  28 #include <stdexcept>
  29 #include <new>
  30 #include <map>
  31 #include <sstream>
  32 #include <fstream>
  33 #include <vector>
  34 #include <deque>
  35 #ifdef THREADED_DNS
  36 #include <pthread.h>
  37 #endif
  38 #include "users.h"
  39 #include "ctables.h"
  40 #include "globals.h"
  41 #include "modules.h"
  42 #include "dynamic.h"
  43 #include "wildcard.h"
  44 #include "message.h"
  45 #include "mode.h"
  46 #include "commands.h"
  47 #include "xline.h"
  48 #include "inspstring.h"
  49 #include "dnsqueue.h"
  50 #include "helperfuncs.h"
  51 #include "hashcomp.h"
  52 #include "socketengine.h"
  53 #include "userprocess.h"
  54 #include "socket.h"
  55 #include "typedefs.h"
  56 #include "command_parse.h"
  57
  58 InspIRCd* ServerInstance;
  59
  60 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  61 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  62
  63 extern std::vector<Module*> modules;
  64 extern std::vector<ircd_module*> factory;
  65
  66 std::vector<InspSocket*> module_sockets;
  67 std::vector<userrec*> local_users;
  68
  69 extern int MODCOUNT;
  70 extern char LOG_FILE[MAXBUF];
  71 int openSockfd[MAX_DESCRIPTORS];
  72 int yield_depth;
  73 int iterations = 0;
  74
  75 insp_sockaddr client, server;
  76
  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
  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 void Exit(int status)
 130 {
 131         if (Config->log_file)
 132                 fclose(Config->log_file);
 133         send_error("Server shutdown.");
 134         exit (status);
 135 }
 136
 137 void Start()
 138 {
 139         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 140         printf("(C) ChatSpike Development team.\033[0m\n\n");
 141         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om\033[0m\n");
 142         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 143         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 144 }
 145
 146 void Killed(int status)
 147 {
 148         if (Config->log_file)
 149                 fclose(Config->log_file);
 150         send_error("Server terminated.");
 151         exit(status);
 152 }
 153
 154 void Rehash(int status)
 155 {
 156         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 157         fclose(Config->log_file);
 158         OpenLog(NULL,0);
 159         Config->Read(false,NULL);
 160         FOREACH_MOD(I_OnRehash,OnRehash(""));
 161 }
 162
 163 void SetSignals()
 164 {
 165         signal (SIGALRM, SIG_IGN);
 166         signal (SIGHUP, Rehash);
 167         signal (SIGPIPE, SIG_IGN);
 168         signal (SIGTERM, Exit);
 169         signal (SIGSEGV, Error);
 170 }
 171
 172 bool DaemonSeed()
 173 {
 174         int childpid;
 175         if ((childpid = fork ()) < 0)
 176                 return (ERROR);
 177         else if (childpid > 0)
 178         {
 179                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 180                 sleep(6);
 181                 exit (0);
 182         }
 183         setsid ();
 184         umask (007);
 185         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 186
 187         rlimit rl;
 188         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 189         {
 190                 log(DEFAULT,"Failed to getrlimit()!");
 191                 return false;
 192         }
 193         else
 194         {
 195                 rl.rlim_cur = rl.rlim_max;
 196                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 197                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 198         }
 199
 200         return true;
 201 }
 202
 203 void WritePID(const std::string &filename)
 204 {
 205         std::ofstream outfile(filename.c_str());
 206         if (outfile.is_open())
 207         {
 208                 outfile << getpid();
 209                 outfile.close();
 210         }
 211         else
 212         {
 213                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 214                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 215                 Exit(0);
 216         }
 217 }
 218
 219 std::string InspIRCd::GetRevision()
 220 {
 221         return REVISION;
 222 }
 223
 224 void InspIRCd::MakeLowerMap()
 225 {
 226         // initialize the lowercase mapping table
 227         for (unsigned int cn = 0; cn < 256; cn++)
 228                 lowermap[cn] = cn;
 229         // lowercase the uppercase chars
 230         for (unsigned int cn = 65; cn < 91; cn++)
 231                 lowermap[cn] = tolower(cn);
 232         // now replace the specific chars for scandanavian comparison
 233         lowermap[(unsigned)'['] = '{';
 234         lowermap[(unsigned)']'] = '}';
 235         lowermap[(unsigned)'\\'] = '|';
 236 }
 237
 238 InspIRCd::InspIRCd(int argc, char** argv)
 239 {
 240         Start();
 241         module_sockets.clear();
 242         this->startup_time = time(NULL);
 243         srand(time(NULL));
 244         log(DEBUG,"*** InspIRCd starting up!");
 245         if (!FileExists(CONFIG_FILE))
 246         {
 247                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 248                 log(DEFAULT,"main: no config");
 249                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 250                 Exit(ERROR);
 251         }
 252         *LOG_FILE = 0;
 253         if (argc > 1) {
 254                 for (int i = 1; i < argc; i++)
 255                 {
 256                         if (!strcmp(argv[i],"-nofork"))
 257                         {
 258                                 Config->nofork = true;
 259                         }
 260                         else if(!strcmp(argv[i],"-debug"))
 261                         {
 262                                 Config->forcedebug = true;
 263                         }
 264                         else if(!strcmp(argv[i],"-nolog"))
 265                         {
 266                                 Config->writelog = false;
 267                         }
 268                         else if (!strcmp(argv[i],"-wait"))
 269                         {
 270                                 sleep(6);
 271                         }
 272                         else if (!strcmp(argv[i],"-nolimit"))
 273                         {
 274                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 275                         }
 276                         else if (!strcmp(argv[i],"-logfile"))
 277                         {
 278                                 if (argc > i+1)
 279                                 {
 280                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 281                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 282                                 }
 283                                 else
 284                                 {
 285                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 286                                         Exit(ERROR);
 287                                 }
 288                         }
 289                 }
 290         }
 291
 292         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 293
 294         this->MakeLowerMap();
 295
 296         OpenLog(argv, argc);
 297         this->stats = new serverstats();
 298         Config->ClearStack();
 299         Config->Read(true,NULL);
 300         CheckRoot();
 301         this->ModeGrok = new ModeParser();
 302         this->Parser = new CommandParser();
 303         AddServerName(Config->ServerName);
 304         CheckDie();
 305         stats->BoundPortCount = BindPorts(true);
 306
 307         for(int t = 0; t < 255; t++)
 308                 Config->global_implementation[t] = 0;
 309
 310         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 311
 312         printf("\n");
 313         SetSignals();
 314         if (!Config->nofork)
 315         {
 316                 if (!DaemonSeed())
 317                 {
 318                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 319                         Exit(ERROR);
 320                 }
 321         }
 322
 323         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 324          * initialize the socket engine.
 325          */
 326         SE = new SocketEngine();
 327
 328         /* We must load the modules AFTER initializing the socket engine, now */
 329
 330         return;
 331 }
 332
 333 std::string InspIRCd::GetVersionString()
 334 {
 335         char versiondata[MAXBUF];
 336 #ifdef THREADED_DNS
 337         char dnsengine[] = "multithread";
 338 #else
 339         char dnsengine[] = "singlethread";
 340 #endif
 341         if (*Config->CustomVersion)
 342         {
 343                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 344         }
 345         else
 346         {
 347                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 348         }
 349         return versiondata;
 350 }
 351
 352 char* InspIRCd::ModuleError()
 353 {
 354         return MODERR;
 355 }
 356
 357 void InspIRCd::erase_factory(int j)
 358 {
 359         int v = 0;
 360         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 361         {
 362                 if (v == j)
 363                 {
 364                         factory.erase(t);
 365                         factory.push_back(NULL);
 366                         return;
 367                 }
 368                 v++;
 369         }
 370 }
 371
 372 void InspIRCd::erase_module(int j)
 373 {
 374         int v1 = 0;
 375         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 376         {
 377                 if (v1 == j)
 378                 {
 379                         delete *m;
 380                         modules.erase(m);
 381                         modules.push_back(NULL);
 382                         break;
 383                 }
 384                 v1++;
 385         }
 386         int v2 = 0;
 387         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 388         {
 389                 if (v2 == j)
 390                 {
 391                        Config->module_names.erase(v);
 392                        break;
 393                 }
 394                 v2++;
 395         }
 396
 397 }
 398
 399 void InspIRCd::MoveTo(std::string modulename,int slot)
 400 {
 401         unsigned int v2 = 256;
 402         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 403         {
 404                 if (Config->module_names[v] == modulename)
 405                 {
 406                         // found an instance, swap it with the item at MODCOUNT
 407                         v2 = v;
 408                         break;
 409                 }
 410         }
 411         if ((v2 != (unsigned int)slot) && (v2 < 256))
 412         {
 413                 // Swap the module names over
 414                 Config->module_names[v2] = Config->module_names[slot];
 415                 Config->module_names[slot] = modulename;
 416                 // now swap the module factories
 417                 ircd_module* temp = factory[v2];
 418                 factory[v2] = factory[slot];
 419                 factory[slot] = temp;
 420                 // now swap the module objects
 421                 Module* temp_module = modules[v2];
 422                 modules[v2] = modules[slot];
 423                 modules[slot] = temp_module;
 424                 // now swap the implement lists (we dont
 425                 // need to swap the global or recount it)
 426                 for (int n = 0; n < 255; n++)
 427                 {
 428                         char x = Config->implement_lists[v2][n];
 429                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 430                         Config->implement_lists[slot][n] = x;
 431                 }
 432         }
 433         else
 434         {
 435                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 436         }
 437 }
 438
 439 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 440 {
 441         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 442         {
 443                 if (Config->module_names[v] == after)
 444                 {
 445                         MoveTo(modulename, v);
 446                         return;
 447                 }
 448         }
 449 }
 450
 451 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 452 {
 453         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 454         {
 455                 if (Config->module_names[v] == before)
 456                 {
 457                         if (v > 0)
 458                         {
 459                                 MoveTo(modulename, v-1);
 460                         }
 461                         else
 462                         {
 463                                 MoveTo(modulename, v);
 464                         }
 465                         return;
 466                 }
 467         }
 468 }
 469
 470 void InspIRCd::MoveToFirst(std::string modulename)
 471 {
 472         MoveTo(modulename,0);
 473 }
 474
 475 void InspIRCd::MoveToLast(std::string modulename)
 476 {
 477         MoveTo(modulename,MODCOUNT);
 478 }
 479
 480 void InspIRCd::BuildISupport()
 481 {
 482         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 483         std::stringstream v;
 484         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 485         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 486         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 487         Config->data005 = v.str();
 488         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 489 }
 490
 491 bool InspIRCd::UnloadModule(const char* filename)
 492 {
 493         std::string filename_str = filename;
 494         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 495         {
 496                 if (Config->module_names[j] == filename_str)
 497                 {
 498                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 499                         {
 500                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 501                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 502                                 return false;
 503                         }
 504                         /* Give the module a chance to tidy out all its metadata */
 505                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 506                         {
 507                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 508                         }
 509                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 510                         {
 511                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 512                         }
 513
 514                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 515
 516                         for(int t = 0; t < 255; t++)
 517                         {
 518                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 519                         }
 520
 521                         /* We have to renumber implement_lists after unload because the module numbers change!
 522                          */
 523                         for(int j2 = j; j2 < 254; j2++)
 524                         {
 525                                 for(int t = 0; t < 255; t++)
 526                                 {
 527                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 528                                 }
 529                         }
 530
 531                         // found the module
 532                         log(DEBUG,"Deleting module...");
 533                         erase_module(j);
 534                         log(DEBUG,"Erasing module entry...");
 535                         erase_factory(j);
 536                         log(DEBUG,"Removing dependent commands...");
 537                         Parser->RemoveCommands(filename);
 538                         log(DEFAULT,"Module %s unloaded",filename);
 539                         MODCOUNT--;
 540                         BuildISupport();
 541                         return true;
 542                 }
 543         }
 544         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 545         snprintf(MODERR,MAXBUF,"Module not loaded");
 546         return false;
 547 }
 548
 549 bool InspIRCd::LoadModule(const char* filename)
 550 {
 551         char modfile[MAXBUF];
 552 #ifdef STATIC_LINK
 553         strlcpy(modfile,filename,MAXBUF);
 554 #else
 555         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 556 #endif
 557         std::string filename_str = filename;
 558 #ifndef STATIC_LINK
 559 #ifndef IS_CYGWIN
 560         if (!DirValid(modfile))
 561         {
 562                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 563                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 564                 return false;
 565         }
 566 #endif
 567 #endif
 568         log(DEBUG,"Loading module: %s",modfile);
 569 #ifndef STATIC_LINK
 570         if (FileExists(modfile))
 571         {
 572 #endif
 573                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 574                 {
 575                         if (Config->module_names[j] == filename_str)
 576                         {
 577                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 578                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 579                                 return false;
 580                         }
 581                 }
 582                 ircd_module* a = new ircd_module(modfile);
 583                 factory[MODCOUNT+1] = a;
 584                 if (factory[MODCOUNT+1]->LastError())
 585                 {
 586                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 587                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 588                         return false;
 589                 }
 590                 try
 591                 {
 592                         if (factory[MODCOUNT+1]->factory)
 593                         {
 594                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 595                                 modules[MODCOUNT+1] = m;
 596                                 /* save the module and the module's classfactory, if
 597                                  * this isnt done, random crashes can occur :/ */
 598                                 Config->module_names.push_back(filename);
 599
 600                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 601                                 for(int t = 0; t < 255; t++)
 602                                         x[t] = 0;
 603
 604                                 modules[MODCOUNT+1]->Implements(x);
 605
 606                                 for(int t = 0; t < 255; t++)
 607                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 608                         }
 609                         else
 610                         {
 611                                 log(DEFAULT,"Unable to load %s",modfile);
 612                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 613                                 return false;
 614                         }
 615                 }
 616                 catch (ModuleException& modexcept)
 617                 {
 618                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 619                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 620                         return false;
 621                 }
 622 #ifndef STATIC_LINK
 623         }
 624         else
 625         {
 626                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 627                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 628                 return false;
 629         }
 630 #endif
 631         MODCOUNT++;
 632         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 633         // now work out which modules, if any, want to move to the back of the queue,
 634         // and if they do, move them there.
 635         std::vector<std::string> put_to_back;
 636         std::vector<std::string> put_to_front;
 637         std::map<std::string,std::string> put_before;
 638         std::map<std::string,std::string> put_after;
 639         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 640         {
 641                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 642                 {
 643                         put_to_back.push_back(Config->module_names[j]);
 644                 }
 645                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 646                 {
 647                         put_to_front.push_back(Config->module_names[j]);
 648                 }
 649                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 650                 {
 651                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 652                 }
 653                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 654                 {
 655                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 656                 }
 657         }
 658         for (unsigned int j = 0; j < put_to_back.size(); j++)
 659         {
 660                 MoveToLast(put_to_back[j]);
 661         }
 662         for (unsigned int j = 0; j < put_to_front.size(); j++)
 663         {
 664                 MoveToFirst(put_to_front[j]);
 665         }
 666         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 667         {
 668                 MoveBefore(j->first,j->second);
 669         }
 670         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 671         {
 672                 MoveAfter(j->first,j->second);
 673         }
 674         BuildISupport();
 675         return true;
 676 }
 677
 678 void InspIRCd::DoOneIteration(bool process_module_sockets)
 679 {
 680         int activefds[MAX_DESCRIPTORS];
 681         int incomingSockfd;
 682         int in_port;
 683         userrec* cu = NULL;
 684         InspSocket* s = NULL;
 685         InspSocket* s_del = NULL;
 686         unsigned int numberactive;
 687         insp_sockaddr sock_us;     // our port number
 688         socklen_t uslen;         // length of our port number
 689
 690         if (yield_depth > 100)
 691                 return;
 692
 693         yield_depth++;
 694
 695         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 696          * Once per loop iteration is pleanty.
 697          */
 698         OLDTIME = TIME;
 699         TIME = time(NULL);
 700
 701         /* Run background module timers every few seconds
 702          * (the docs say modules shouldnt rely on accurate
 703          * timing using this event, so we dont have to
 704          * time this exactly).
 705          */
 706         if (((TIME % 5) == 0) && (!expire_run))
 707         {
 708                 expire_lines();
 709                 if (process_module_sockets)
 710                 {
 711                         /* Fix by brain - the addition of DoOneIteration means that this
 712                          * can end up getting called recursively in the following pattern:
 713                          *
 714                          * m_spanningtree DoPingChecks
 715                          * (server pings out and is squit)
 716                          * (squit causes call to DoOneIteration)
 717                          * DoOneIteration enters here
 718                          * calls DoBackground timer
 719                          * enters m_spanningtree DoPingChecks... see step 1.
 720                          *
 721                          * This should do the job and fix the bug.
 722                          */
 723                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 724                 }
 725                 TickMissedTimers(TIME);
 726                 expire_run = true;
 727                 yield_depth--;
 728                 return;
 729         }
 730         else if ((TIME % 5) == 1)
 731         {
 732                 expire_run = false;
 733         }
 734
 735         if (iterations++ == 15)
 736         {
 737                 iterations = 0;
 738                 DoBackgroundUserStuff(TIME);
 739         }
 740
 741         /* Once a second, do the background processing */
 742         if (TIME != OLDTIME)
 743         {
 744                 if (TIME < OLDTIME)
 745                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 746                 if ((TIME % 3600) == 0)
 747                 {
 748                         MaintainWhoWas(TIME);
 749                 }
 750         }
 751
 752         /* Process timeouts on module sockets each time around
 753          * the loop. There shouldnt be many module sockets, at
 754          * most, 20 or so, so this won't be much of a performance
 755          * hit at all.
 756          */
 757         if (process_module_sockets)
 758                 DoSocketTimeouts(TIME);
 759
 760         TickTimers(TIME);
 761
 762         /* Call the socket engine to wait on the active
 763          * file descriptors. The socket engine has everything's
 764          * descriptors in its list... dns, modules, users,
 765          * servers... so its nice and easy, just one call.
 766          */
 767         if (!(numberactive = SE->Wait(activefds)))
 768         {
 769                 yield_depth--;
 770                 return;
 771         }
 772
 773         /**
 774          * Now process each of the fd's. For users, we have a fast
 775          * lookup table which can find a user by file descriptor, so
 776          * processing them by fd isnt expensive. If we have a lot of
 777          * listening ports or module sockets though, things could get
 778          * ugly.
 779          */
 780         log(DEBUG,"There are %d fd's to process.",numberactive);
 781
 782         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 783         {
 784                 int socket_type = SE->GetType(activefds[activefd]);
 785                 switch (socket_type)
 786                 {
 787                         case X_ESTAB_CLIENT:
 788
 789                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 790                                 cu = fd_ref_table[activefds[activefd]];
 791                                 if (cu)
 792                                         ProcessUser(cu);
 793
 794                         break;
 795
 796                         case X_ESTAB_MODULE:
 797
 798                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 799
 800                                 if (!process_module_sockets)
 801                                         break;
 802
 803                                 /* Process module-owned sockets.
 804                                  * Modules are encouraged to inherit their sockets from
 805                                  * InspSocket so we can process them neatly like this.
 806                                  */
 807                                 s = socket_ref[activefds[activefd]];
 808
 809                                 if ((s) && (!s->Poll()))
 810                                 {
 811                                         log(DEBUG,"inspircd.cpp: Socket poll returned false, close and bail");
 812                                         SE->DelFd(s->GetFd());
 813                                         socket_ref[activefds[activefd]] = NULL;
 814                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 815                                         {
 816                                                 s_del = (InspSocket*)*a;
 817                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 818                                                 {
 819                                                         module_sockets.erase(a);
 820                                                         break;
 821                                                 }
 822                                         }
 823                                         s->Close();
 824                                         delete s;
 825                                 }
 826                                 else if (!s)
 827                                 {
 828                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 829                                         SE->DelFd(s->GetFd());
 830                                 }
 831                         break;
 832
 833                         case X_ESTAB_DNS:
 834                                 /* When we are using single-threaded dns,
 835                                  * the sockets for dns end up in our mainloop.
 836                                  * When we are using multi-threaded dns,
 837                                  * each thread has its own basic poll() loop
 838                                  * within it, making them 'fire and forget'
 839                                  * and independent of the mainloop.
 840                                  */
 841 #ifndef THREADED_DNS
 842                                 log(DEBUG,"Type: X_ESTAB_DNS: fd=%d",activefds[activefd]);
 843                                 dns_poll(activefds[activefd]);
 844 #endif
 845                         break;
 846
 847                         case X_LISTEN:
 848
 849                                 log(DEBUG,"Type: X_LISTEN_MODULE: fd=%d",activefds[activefd]);
 850
 851                                 /* It's a listener */
 852                                 uslen = sizeof(sock_us);
 853                                 length = sizeof(client);
 854                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 855
 856                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 857                                 {
 858                                         in_port = ntohs(sock_us.sin_port);
 859                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 860                                         /* Years and years ago, we used to resolve here
 861                                          * using gethostbyaddr(). That is sucky and we
 862                                          * don't do that any more...
 863                                          */
 864                                         NonBlocking(incomingSockfd);
 865                                         if (Config->GetIOHook(in_port))
 866                                         {
 867                                                 try
 868                                                 {
 869                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 870                                                 }
 871                                                 catch (ModuleException& modexcept)
 872                                                 {
 873                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 874                                                 }
 875                                         }
 876                                         stats->statsAccept++;
 877                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 878                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 879                                 }
 880                                 else
 881                                 {
 882                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 883                                         shutdown(incomingSockfd,2);
 884                                         close(incomingSockfd);
 885                                         stats->statsRefused++;
 886                                 }
 887                         break;
 888
 889                         default:
 890                                 /* Something went wrong if we're in here.
 891                                  * In fact, so wrong, im not quite sure
 892                                  * what we would do, so for now, its going
 893                                  * to safely do bugger all.
 894                                  */
 895                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 896                                 SE->DelFd(activefds[activefd]);
 897                         break;
 898                 }
 899         }
 900         yield_depth--;
 901 }
 902
 903 int InspIRCd::Run()
 904 {
 905         /* Until THIS point, ServerInstance == NULL */
 906
 907         LoadAllModules(this);
 908
 909         /* Just in case no modules were loaded - fix for bug #101 */
 910         this->BuildISupport();
 911
 912         printf("\nInspIRCd is now running!\n");
 913
 914         if (!Config->nofork)
 915         {
 916                 fclose(stdout);
 917                 fclose(stderr);
 918                 fclose(stdin);
 919         }
 920
 921         /* Add the listening sockets used for client inbound connections
 922          * to the socket engine
 923          */
 924         for (int count = 0; count < stats->BoundPortCount; count++)
 925                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 926
 927         WritePID(Config->PID);
 928
 929         /* main loop, this never returns */
 930         expire_run = false;
 931         yield_depth = 0;
 932         iterations = 0;
 933
 934         while (true)
 935         {
 936                 DoOneIteration(true);
 937         }
 938         /* This is never reached -- we hope! */
 939         return 0;
 940 }
 941
 942 /**********************************************************************************/
 943
 944 /**
 945  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 946  */
 947
 948 int main(int argc, char** argv)
 949 {
 950         try
 951         {
 952                 ServerInstance = new InspIRCd(argc, argv);
 953                 ServerInstance->Run();
 954                 delete ServerInstance;
 955         }
 956         catch (std::bad_alloc)
 957         {
 958                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
 959                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 960                 printf("Out of memory! (got exception std::bad_alloc!");
 961         }
 962         return 0;
 963 }