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 <algorithm>
  20 #include "inspircd_config.h"
  21 #include "inspircd.h"
  22 #include "configreader.h"
  23 #include <fcntl.h>
  24 #include <sys/errno.h>
  25 #include <sys/ioctl.h>
  26 #include <signal.h>
  27 #include <time.h>
  28 #include <string>
  29 #include <exception>
  30 #include <stdexcept>
  31 #include <new>
  32 #include <map>
  33 #include <sstream>
  34 #include <fstream>
  35 #include <vector>
  36 #include <deque>
  37 #ifdef THREADED_DNS
  38 #include <pthread.h>
  39 #endif
  40 #ifdef HAS_EXECINFO
  41 #include <execinfo.h>
  42 #endif
  43 #include "users.h"
  44 #include "ctables.h"
  45 #include "globals.h"
  46 #include "modules.h"
  47 #include "dynamic.h"
  48 #include "wildcard.h"
  49 #include "message.h"
  50 #include "mode.h"
  51 #include "commands.h"
  52 #include "xline.h"
  53 #include "inspstring.h"
  54 #include "dnsqueue.h"
  55 #include "helperfuncs.h"
  56 #include "hashcomp.h"
  57 #include "socketengine.h"
  58 #include "userprocess.h"
  59 #include "socket.h"
  60 #include "typedefs.h"
  61 #include "command_parse.h"
  62
  63 InspIRCd* ServerInstance;
  64
  65 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  66 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  67
  68 extern ModuleList modules;
  69 extern FactoryList factory;
  70
  71 std::vector<InspSocket*> module_sockets;
  72 std::vector<userrec*> local_users;
  73
  74 extern int MODCOUNT;
  75 extern char LOG_FILE[MAXBUF];
  76 int openSockfd[MAX_DESCRIPTORS];
  77 int yield_depth;
  78 int iterations = 0;
  79
  80 insp_sockaddr client, server;
  81
  82 socklen_t length;
  83
  84 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  85
  86 time_t TIME = time(NULL), OLDTIME = time(NULL);
  87
  88 // This table references users by file descriptor.
  89 // its an array to make it VERY fast, as all lookups are referenced
  90 // by an integer, meaning there is no need for a scan/search operation.
  91 userrec* fd_ref_table[MAX_DESCRIPTORS];
  92
  93 Server* MyServer = new Server;
  94 ServerConfig *Config = new ServerConfig;
  95
  96 user_hash clientlist;
  97 chan_hash chanlist;
  98
  99 servernamelist servernames;
 100 char lowermap[255];
 101
 102 void AddServerName(const std::string &servername)
 103 {
 104         log(DEBUG,"Adding server name: %s",servername.c_str());
 105
 106         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
 107                 servernames.push_back(servername); /* Wasn't already there. */
 108 }
 109
 110 const char* FindServerNamePtr(const std::string &servername)
 111 {
 112         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
 113
 114         if(iter == servernames.end())
 115         {
 116                 AddServerName(servername);
 117                 iter = --servernames.end();
 118         }
 119
 120         return iter->c_str();
 121 }
 122
 123 bool FindServerName(const std::string &servername)
 124 {
 125         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 126 }
 127
 128 void Exit(int status)
 129 {
 130         if (Config->log_file)
 131                 fclose(Config->log_file);
 132         send_error("Server shutdown.");
 133         exit (status);
 134 }
 135
 136 void Start()
 137 {
 138         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 139         printf("(C) ChatSpike Development team.\033[0m\n\n");
 140         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om\033[0m\n");
 141         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 142         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 143 }
 144
 145 void Killed(int status)
 146 {
 147         if (Config->log_file)
 148                 fclose(Config->log_file);
 149         send_error("Server terminated.");
 150         exit(status);
 151 }
 152
 153 void Rehash(int status)
 154 {
 155         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 156         fclose(Config->log_file);
 157         OpenLog(NULL,0);
 158         Config->Read(false,NULL);
 159         FOREACH_MOD(I_OnRehash,OnRehash(""));
 160 }
 161
 162 void SetSignals()
 163 {
 164         signal (SIGALRM, SIG_IGN);
 165         signal (SIGHUP, Rehash);
 166         signal (SIGPIPE, SIG_IGN);
 167         signal (SIGTERM, Exit);
 168         signal (SIGSEGV, Error);
 169 }
 170
 171 bool DaemonSeed()
 172 {
 173         int childpid;
 174         if ((childpid = fork ()) < 0)
 175                 return (ERROR);
 176         else if (childpid > 0)
 177         {
 178                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 179                 sleep(6);
 180                 exit (0);
 181         }
 182         setsid ();
 183         umask (007);
 184         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 185
 186         rlimit rl;
 187         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 188         {
 189                 log(DEFAULT,"Failed to getrlimit()!");
 190                 return false;
 191         }
 192         else
 193         {
 194                 rl.rlim_cur = rl.rlim_max;
 195                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 196                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 197         }
 198
 199         return true;
 200 }
 201
 202 void WritePID(const std::string &filename)
 203 {
 204         std::ofstream outfile(filename.c_str());
 205         if (outfile.is_open())
 206         {
 207                 outfile << getpid();
 208                 outfile.close();
 209         }
 210         else
 211         {
 212                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 213                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 214                 Exit(0);
 215         }
 216 }
 217
 218 std::string InspIRCd::GetRevision()
 219 {
 220         return REVISION;
 221 }
 222
 223 void InspIRCd::MakeLowerMap()
 224 {
 225         // initialize the lowercase mapping table
 226         for (unsigned int cn = 0; cn < 256; cn++)
 227                 lowermap[cn] = cn;
 228         // lowercase the uppercase chars
 229         for (unsigned int cn = 65; cn < 91; cn++)
 230                 lowermap[cn] = tolower(cn);
 231         // now replace the specific chars for scandanavian comparison
 232         lowermap[(unsigned)'['] = '{';
 233         lowermap[(unsigned)']'] = '}';
 234         lowermap[(unsigned)'\\'] = '|';
 235 }
 236
 237 InspIRCd::InspIRCd(int argc, char** argv)
 238 {
 239         Start();
 240         module_sockets.clear();
 241         this->startup_time = time(NULL);
 242         srand(time(NULL));
 243         log(DEBUG,"*** InspIRCd starting up!");
 244         if (!FileExists(CONFIG_FILE))
 245         {
 246                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 247                 log(DEFAULT,"main: no config");
 248                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 249                 Exit(ERROR);
 250         }
 251         *LOG_FILE = 0;
 252         if (argc > 1) {
 253                 for (int i = 1; i < argc; i++)
 254                 {
 255                         if (!strcmp(argv[i],"-nofork"))
 256                         {
 257                                 Config->nofork = true;
 258                         }
 259                         else if(!strcmp(argv[i],"-debug"))
 260                         {
 261                                 Config->forcedebug = true;
 262                         }
 263                         else if(!strcmp(argv[i],"-nolog"))
 264                         {
 265                                 Config->writelog = false;
 266                         }
 267                         else if (!strcmp(argv[i],"-wait"))
 268                         {
 269                                 sleep(6);
 270                         }
 271                         else if (!strcmp(argv[i],"-nolimit"))
 272                         {
 273                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 274                         }
 275                         else if (!strcmp(argv[i],"-logfile"))
 276                         {
 277                                 if (argc > i+1)
 278                                 {
 279                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 280                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 281                                 }
 282                                 else
 283                                 {
 284                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 285                                         Exit(ERROR);
 286                                 }
 287                         }
 288                 }
 289         }
 290
 291         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 292
 293         this->MakeLowerMap();
 294
 295         OpenLog(argv, argc);
 296         this->stats = new serverstats();
 297         Config->ClearStack();
 298         Config->Read(true,NULL);
 299         CheckRoot();
 300         this->ModeGrok = new ModeParser();
 301         this->Parser = new CommandParser();
 302         AddServerName(Config->ServerName);
 303         CheckDie();
 304         stats->BoundPortCount = BindPorts(true);
 305
 306         for(int t = 0; t < 255; t++)
 307                 Config->global_implementation[t] = 0;
 308
 309         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 310
 311         printf("\n");
 312         SetSignals();
 313         if (!Config->nofork)
 314         {
 315                 if (!DaemonSeed())
 316                 {
 317                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 318                         Exit(ERROR);
 319                 }
 320         }
 321
 322         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 323          * initialize the socket engine.
 324          */
 325         SE = new SocketEngine();
 326
 327         /* We must load the modules AFTER initializing the socket engine, now */
 328
 329         return;
 330 }
 331
 332 std::string InspIRCd::GetVersionString()
 333 {
 334         char versiondata[MAXBUF];
 335 #ifdef THREADED_DNS
 336         char dnsengine[] = "multithread";
 337 #else
 338         char dnsengine[] = "singlethread";
 339 #endif
 340         if (*Config->CustomVersion)
 341         {
 342                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 343         }
 344         else
 345         {
 346                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 347         }
 348         return versiondata;
 349 }
 350
 351 char* InspIRCd::ModuleError()
 352 {
 353         return MODERR;
 354 }
 355
 356 void InspIRCd::erase_factory(int j)
 357 {
 358         int v = 0;
 359         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 360         {
 361                 if (v == j)
 362                 {
 363                         factory.erase(t);
 364                         factory.push_back(NULL);
 365                         return;
 366                 }
 367                 v++;
 368         }
 369 }
 370
 371 void InspIRCd::erase_module(int j)
 372 {
 373         int v1 = 0;
 374         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 375         {
 376                 if (v1 == j)
 377                 {
 378                         delete *m;
 379                         modules.erase(m);
 380                         modules.push_back(NULL);
 381                         break;
 382                 }
 383                 v1++;
 384         }
 385         int v2 = 0;
 386         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 387         {
 388                 if (v2 == j)
 389                 {
 390                        Config->module_names.erase(v);
 391                        break;
 392                 }
 393                 v2++;
 394         }
 395
 396 }
 397
 398 void InspIRCd::MoveTo(std::string modulename,int slot)
 399 {
 400         unsigned int v2 = 256;
 401         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 402         {
 403                 if (Config->module_names[v] == modulename)
 404                 {
 405                         // found an instance, swap it with the item at MODCOUNT
 406                         v2 = v;
 407                         break;
 408                 }
 409         }
 410         if ((v2 != (unsigned int)slot) && (v2 < 256))
 411         {
 412                 // Swap the module names over
 413                 Config->module_names[v2] = Config->module_names[slot];
 414                 Config->module_names[slot] = modulename;
 415                 // now swap the module factories
 416                 ircd_module* temp = factory[v2];
 417                 factory[v2] = factory[slot];
 418                 factory[slot] = temp;
 419                 // now swap the module objects
 420                 Module* temp_module = modules[v2];
 421                 modules[v2] = modules[slot];
 422                 modules[slot] = temp_module;
 423                 // now swap the implement lists (we dont
 424                 // need to swap the global or recount it)
 425                 for (int n = 0; n < 255; n++)
 426                 {
 427                         char x = Config->implement_lists[v2][n];
 428                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 429                         Config->implement_lists[slot][n] = x;
 430                 }
 431         }
 432         else
 433         {
 434                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 435         }
 436 }
 437
 438 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 439 {
 440         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 441         {
 442                 if (Config->module_names[v] == after)
 443                 {
 444                         MoveTo(modulename, v);
 445                         return;
 446                 }
 447         }
 448 }
 449
 450 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 451 {
 452         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 453         {
 454                 if (Config->module_names[v] == before)
 455                 {
 456                         if (v > 0)
 457                         {
 458                                 MoveTo(modulename, v-1);
 459                         }
 460                         else
 461                         {
 462                                 MoveTo(modulename, v);
 463                         }
 464                         return;
 465                 }
 466         }
 467 }
 468
 469 void InspIRCd::MoveToFirst(std::string modulename)
 470 {
 471         MoveTo(modulename,0);
 472 }
 473
 474 void InspIRCd::MoveToLast(std::string modulename)
 475 {
 476         MoveTo(modulename,MODCOUNT);
 477 }
 478
 479 void InspIRCd::BuildISupport()
 480 {
 481         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 482         std::stringstream v;
 483         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 484         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 485         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 486         Config->data005 = v.str();
 487         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 488 }
 489
 490 bool InspIRCd::UnloadModule(const char* filename)
 491 {
 492         std::string filename_str = filename;
 493         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 494         {
 495                 if (Config->module_names[j] == filename_str)
 496                 {
 497                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 498                         {
 499                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 500                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 501                                 return false;
 502                         }
 503                         /* Give the module a chance to tidy out all its metadata */
 504                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 505                         {
 506                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 507                         }
 508                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 509                         {
 510                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 511                         }
 512
 513                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 514
 515                         for(int t = 0; t < 255; t++)
 516                         {
 517                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 518                         }
 519
 520                         /* We have to renumber implement_lists after unload because the module numbers change!
 521                          */
 522                         for(int j2 = j; j2 < 254; j2++)
 523                         {
 524                                 for(int t = 0; t < 255; t++)
 525                                 {
 526                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 527                                 }
 528                         }
 529
 530                         // found the module
 531                         log(DEBUG,"Deleting module...");
 532                         erase_module(j);
 533                         log(DEBUG,"Erasing module entry...");
 534                         erase_factory(j);
 535                         log(DEBUG,"Removing dependent commands...");
 536                         Parser->RemoveCommands(filename);
 537                         log(DEFAULT,"Module %s unloaded",filename);
 538                         MODCOUNT--;
 539                         BuildISupport();
 540                         return true;
 541                 }
 542         }
 543         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 544         snprintf(MODERR,MAXBUF,"Module not loaded");
 545         return false;
 546 }
 547
 548 bool InspIRCd::LoadModule(const char* filename)
 549 {
 550         char modfile[MAXBUF];
 551 #ifdef STATIC_LINK
 552         strlcpy(modfile,filename,MAXBUF);
 553 #else
 554         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 555 #endif
 556         std::string filename_str = filename;
 557 #ifndef STATIC_LINK
 558 #ifndef IS_CYGWIN
 559         if (!DirValid(modfile))
 560         {
 561                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 562                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 563                 return false;
 564         }
 565 #endif
 566 #endif
 567         log(DEBUG,"Loading module: %s",modfile);
 568 #ifndef STATIC_LINK
 569         if (FileExists(modfile))
 570         {
 571 #endif
 572                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 573                 {
 574                         if (Config->module_names[j] == filename_str)
 575                         {
 576                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 577                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 578                                 return false;
 579                         }
 580                 }
 581                 ircd_module* a = new ircd_module(modfile);
 582                 factory[MODCOUNT+1] = a;
 583                 if (factory[MODCOUNT+1]->LastError())
 584                 {
 585                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 586                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 587                         return false;
 588                 }
 589                 try
 590                 {
 591                         if (factory[MODCOUNT+1]->factory)
 592                         {
 593                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 594                                 modules[MODCOUNT+1] = m;
 595                                 /* save the module and the module's classfactory, if
 596                                  * this isnt done, random crashes can occur :/ */
 597                                 Config->module_names.push_back(filename);
 598
 599                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 600                                 for(int t = 0; t < 255; t++)
 601                                         x[t] = 0;
 602
 603                                 modules[MODCOUNT+1]->Implements(x);
 604
 605                                 for(int t = 0; t < 255; t++)
 606                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 607                         }
 608                         else
 609                         {
 610                                 log(DEFAULT,"Unable to load %s",modfile);
 611                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 612                                 return false;
 613                         }
 614                 }
 615                 catch (ModuleException& modexcept)
 616                 {
 617                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 618                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 619                         return false;
 620                 }
 621 #ifndef STATIC_LINK
 622         }
 623         else
 624         {
 625                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 626                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 627                 return false;
 628         }
 629 #endif
 630         MODCOUNT++;
 631         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 632         // now work out which modules, if any, want to move to the back of the queue,
 633         // and if they do, move them there.
 634         std::vector<std::string> put_to_back;
 635         std::vector<std::string> put_to_front;
 636         std::map<std::string,std::string> put_before;
 637         std::map<std::string,std::string> put_after;
 638         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 639         {
 640                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 641                 {
 642                         put_to_back.push_back(Config->module_names[j]);
 643                 }
 644                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 645                 {
 646                         put_to_front.push_back(Config->module_names[j]);
 647                 }
 648                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 649                 {
 650                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 651                 }
 652                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 653                 {
 654                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 655                 }
 656         }
 657         for (unsigned int j = 0; j < put_to_back.size(); j++)
 658         {
 659                 MoveToLast(put_to_back[j]);
 660         }
 661         for (unsigned int j = 0; j < put_to_front.size(); j++)
 662         {
 663                 MoveToFirst(put_to_front[j]);
 664         }
 665         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 666         {
 667                 MoveBefore(j->first,j->second);
 668         }
 669         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 670         {
 671                 MoveAfter(j->first,j->second);
 672         }
 673         BuildISupport();
 674         return true;
 675 }
 676
 677 void InspIRCd::DoOneIteration(bool process_module_sockets)
 678 {
 679         int activefds[MAX_DESCRIPTORS];
 680         int incomingSockfd;
 681         int in_port;
 682         userrec* cu = NULL;
 683         InspSocket* s = NULL;
 684         InspSocket* s_del = NULL;
 685         unsigned int numberactive;
 686         insp_sockaddr sock_us;     // our port number
 687         socklen_t uslen;         // length of our port number
 688
 689         if (yield_depth > 100)
 690                 return;
 691
 692         yield_depth++;
 693
 694         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 695          * Once per loop iteration is pleanty.
 696          */
 697         OLDTIME = TIME;
 698         TIME = time(NULL);
 699
 700         /* Run background module timers every few seconds
 701          * (the docs say modules shouldnt rely on accurate
 702          * timing using this event, so we dont have to
 703          * time this exactly).
 704          */
 705         if (((TIME % 5) == 0) && (!expire_run))
 706         {
 707                 expire_lines();
 708                 if (process_module_sockets)
 709                 {
 710                         /* Fix by brain - the addition of DoOneIteration means that this
 711                          * can end up getting called recursively in the following pattern:
 712                          *
 713                          * m_spanningtree DoPingChecks
 714                          * (server pings out and is squit)
 715                          * (squit causes call to DoOneIteration)
 716                          * DoOneIteration enters here
 717                          * calls DoBackground timer
 718                          * enters m_spanningtree DoPingChecks... see step 1.
 719                          *
 720                          * This should do the job and fix the bug.
 721                          */
 722                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 723                 }
 724                 TickMissedTimers(TIME);
 725                 expire_run = true;
 726                 yield_depth--;
 727                 return;
 728         }
 729         else if ((TIME % 5) == 1)
 730         {
 731                 expire_run = false;
 732         }
 733
 734         if (iterations++ == 15)
 735         {
 736                 iterations = 0;
 737                 DoBackgroundUserStuff(TIME);
 738         }
 739
 740         /* Once a second, do the background processing */
 741         if (TIME != OLDTIME)
 742         {
 743                 if (TIME < OLDTIME)
 744                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 745                 if ((TIME % 3600) == 0)
 746                 {
 747                         MaintainWhoWas(TIME);
 748                 }
 749         }
 750
 751         /* Process timeouts on module sockets each time around
 752          * the loop. There shouldnt be many module sockets, at
 753          * most, 20 or so, so this won't be much of a performance
 754          * hit at all.
 755          */
 756         if (process_module_sockets)
 757                 DoSocketTimeouts(TIME);
 758
 759         TickTimers(TIME);
 760
 761         /* Call the socket engine to wait on the active
 762          * file descriptors. The socket engine has everything's
 763          * descriptors in its list... dns, modules, users,
 764          * servers... so its nice and easy, just one call.
 765          */
 766         if (!(numberactive = SE->Wait(activefds)))
 767         {
 768                 yield_depth--;
 769                 return;
 770         }
 771
 772         /**
 773          * Now process each of the fd's. For users, we have a fast
 774          * lookup table which can find a user by file descriptor, so
 775          * processing them by fd isnt expensive. If we have a lot of
 776          * listening ports or module sockets though, things could get
 777          * ugly.
 778          */
 779         log(DEBUG,"There are %d fd's to process.",numberactive);
 780
 781         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 782         {
 783                 int socket_type = SE->GetType(activefds[activefd]);
 784                 switch (socket_type)
 785                 {
 786                         case X_ESTAB_CLIENT:
 787
 788                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 789                                 cu = fd_ref_table[activefds[activefd]];
 790                                 if (cu)
 791                                         ProcessUser(cu);
 792
 793                         break;
 794
 795                         case X_ESTAB_MODULE:
 796
 797                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 798
 799                                 if (!process_module_sockets)
 800                                         break;
 801
 802                                 /* Process module-owned sockets.
 803                                  * Modules are encouraged to inherit their sockets from
 804                                  * InspSocket so we can process them neatly like this.
 805                                  */
 806                                 s = socket_ref[activefds[activefd]];
 807
 808                                 if ((s) && (!s->Poll()))
 809                                 {
 810                                         log(DEBUG,"inspircd.cpp: Socket poll returned false, close and bail");
 811                                         SE->DelFd(s->GetFd());
 812                                         socket_ref[activefds[activefd]] = NULL;
 813                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 814                                         {
 815                                                 s_del = (InspSocket*)*a;
 816                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 817                                                 {
 818                                                         module_sockets.erase(a);
 819                                                         break;
 820                                                 }
 821                                         }
 822                                         s->Close();
 823                                         delete s;
 824                                 }
 825                                 else if (!s)
 826                                 {
 827                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 828                                         SE->DelFd(s->GetFd());
 829                                 }
 830                         break;
 831
 832                         case X_ESTAB_DNS:
 833                                 /* When we are using single-threaded dns,
 834                                  * the sockets for dns end up in our mainloop.
 835                                  * When we are using multi-threaded dns,
 836                                  * each thread has its own basic poll() loop
 837                                  * within it, making them 'fire and forget'
 838                                  * and independent of the mainloop.
 839                                  */
 840 #ifndef THREADED_DNS
 841                                 log(DEBUG,"Type: X_ESTAB_DNS: fd=%d",activefds[activefd]);
 842                                 dns_poll(activefds[activefd]);
 843 #endif
 844                         break;
 845
 846                         case X_LISTEN:
 847
 848                                 log(DEBUG,"Type: X_LISTEN_MODULE: fd=%d",activefds[activefd]);
 849
 850                                 /* It's a listener */
 851                                 uslen = sizeof(sock_us);
 852                                 length = sizeof(client);
 853                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 854
 855                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 856                                 {
 857                                         in_port = ntohs(sock_us.sin_port);
 858                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 859                                         /* Years and years ago, we used to resolve here
 860                                          * using gethostbyaddr(). That is sucky and we
 861                                          * don't do that any more...
 862                                          */
 863                                         NonBlocking(incomingSockfd);
 864                                         if (Config->GetIOHook(in_port))
 865                                         {
 866                                                 try
 867                                                 {
 868                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, (char*)inet_ntoa(client.sin_addr), in_port);
 869                                                 }
 870                                                 catch (ModuleException& modexcept)
 871                                                 {
 872                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 873                                                 }
 874                                         }
 875                                         stats->statsAccept++;
 876                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 877                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 878                                 }
 879                                 else
 880                                 {
 881                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 882                                         shutdown(incomingSockfd,2);
 883                                         close(incomingSockfd);
 884                                         stats->statsRefused++;
 885                                 }
 886                         break;
 887
 888                         default:
 889                                 /* Something went wrong if we're in here.
 890                                  * In fact, so wrong, im not quite sure
 891                                  * what we would do, so for now, its going
 892                                  * to safely do bugger all.
 893                                  */
 894                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 895                                 SE->DelFd(activefds[activefd]);
 896                         break;
 897                 }
 898         }
 899         yield_depth--;
 900 }
 901
 902 int InspIRCd::Run()
 903 {
 904         /* Until THIS point, ServerInstance == NULL */
 905
 906         LoadAllModules(this);
 907
 908         /* Just in case no modules were loaded - fix for bug #101 */
 909         this->BuildISupport();
 910
 911         printf("\nInspIRCd is now running!\n");
 912
 913         if (!Config->nofork)
 914         {
 915                 fclose(stdout);
 916                 fclose(stderr);
 917                 fclose(stdin);
 918         }
 919
 920         /* Add the listening sockets used for client inbound connections
 921          * to the socket engine
 922          */
 923         for (int count = 0; count < stats->BoundPortCount; count++)
 924                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 925
 926         WritePID(Config->PID);
 927
 928         /* main loop, this never returns */
 929         expire_run = false;
 930         yield_depth = 0;
 931         iterations = 0;
 932
 933         while (true)
 934         {
 935                 DoOneIteration(true);
 936         }
 937         /* This is never reached -- we hope! */
 938         return 0;
 939 }
 940
 941 /**********************************************************************************/
 942
 943 /**
 944  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 945  */
 946
 947 int main(int argc, char** argv)
 948 {
 949         try
 950         {
 951                 ServerInstance = new InspIRCd(argc, argv);
 952                 ServerInstance->Run();
 953                 delete ServerInstance;
 954         }
 955         catch (std::bad_alloc)
 956         {
 957                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
 958                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 959                 printf("Out of memory! (got exception std::bad_alloc!");
 960         }
 961         return 0;
 962 }