src/inspircd.cpp

   1 /* ---------------------------------------------------------------------
   2  *
   3  *              +------------------------------------+
   4  *              | Inspire Internet Relay Chat Daemon |
   5  *              +------------------------------------+
   6  *
   7  *         InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   8  *                             E-mail:
   9  *                      <brain@chatspike.net>
  10  *                      <Craig@chatspike.net>
  11  *
  12  *  Written by Craig Edwards, Craig McLure, and others.
  13  *  This program is free but copyrighted software; you can redistribute
  14  *  it and/or modify it under the terms of the GNU General Public
  15  *  License as published by the Free Software Foundation, version 2
  16  *  (two) ONLY.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  *
  27  * ---------------------------------------------------------------------
  28  */
  29
  30 #include <algorithm>
  31 #include "inspircd_config.h"
  32 #include "inspircd.h"
  33 #include "configreader.h"
  34 #include <fcntl.h>
  35 #include <sys/errno.h>
  36 #include <sys/ioctl.h>
  37 #include <signal.h>
  38 #include <time.h>
  39 #include <string>
  40 #include <exception>
  41 #include <stdexcept>
  42 #include <new>
  43 #include <map>
  44 #include <sstream>
  45 #include <fstream>
  46 #include <vector>
  47 #include <deque>
  48 #include "users.h"
  49 #include "ctables.h"
  50 #include "globals.h"
  51 #include "modules.h"
  52 #include "dynamic.h"
  53 #include "wildcard.h"
  54 #include "message.h"
  55 #include "mode.h"
  56 #include "commands.h"
  57 #include "xline.h"
  58 #include "inspstring.h"
  59 #include "dnsqueue.h"
  60 #include "helperfuncs.h"
  61 #include "hashcomp.h"
  62 #include "socketengine.h"
  63 #include "inspircd_se_config.h"
  64 #include "userprocess.h"
  65 #include "socket.h"
  66 #include "typedefs.h"
  67 #include "command_parse.h"
  68
  69 InspIRCd* ServerInstance;
  70
  71 extern ModuleList modules;
  72 extern FactoryList factory;
  73
  74 std::vector<InspSocket*> module_sockets;
  75 std::vector<userrec*> local_users;
  76
  77 extern int MODCOUNT;
  78 extern char LOG_FILE[MAXBUF];
  79
  80 int iterations = 0;
  81
  82 insp_sockaddr client, server;
  83 socklen_t length;
  84
  85 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  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 Server* MyServer = new Server;
  93 ServerConfig *Config = new ServerConfig;
  94 user_hash clientlist;
  95 chan_hash chanlist;
  96 servernamelist servernames;
  97 char lowermap[255];
  98
  99 void AddServerName(const std::string &servername)
 100 {
 101         log(DEBUG,"Adding server name: %s",servername.c_str());
 102
 103         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
 104                 servernames.push_back(servername); /* Wasn't already there. */
 105 }
 106
 107 const char* FindServerNamePtr(const std::string &servername)
 108 {
 109         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
 110
 111         if(iter == servernames.end())
 112         {
 113                 AddServerName(servername);
 114                 iter = --servernames.end();
 115         }
 116
 117         return iter->c_str();
 118 }
 119
 120 bool FindServerName(const std::string &servername)
 121 {
 122         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 123 }
 124
 125 void Exit(int status)
 126 {
 127         if (Config->log_file)
 128                 fclose(Config->log_file);
 129         send_error("Server shutdown.");
 130         exit (status);
 131 }
 132
 133 void InspIRCd::Start()
 134 {
 135         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 136         printf("(C) ChatSpike Development team.\033[0m\n\n");
 137         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 138         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 139         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 140 }
 141
 142 void Killed(int status)
 143 {
 144         if (Config->log_file)
 145                 fclose(Config->log_file);
 146         send_error("Server terminated.");
 147         exit(status);
 148 }
 149
 150 void Rehash(int status)
 151 {
 152         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 153         fclose(Config->log_file);
 154         OpenLog(NULL,0);
 155         Config->Read(false,NULL);
 156         FOREACH_MOD(I_OnRehash,OnRehash(""));
 157 }
 158
 159 void InspIRCd::SetSignals()
 160 {
 161         signal (SIGALRM, SIG_IGN);
 162         signal (SIGHUP, Rehash);
 163         signal (SIGPIPE, SIG_IGN);
 164         signal (SIGTERM, Exit);
 165         signal (SIGSEGV, Error);
 166 }
 167
 168 bool InspIRCd::DaemonSeed()
 169 {
 170         int childpid;
 171         if ((childpid = fork ()) < 0)
 172                 return (ERROR);
 173         else if (childpid > 0)
 174         {
 175                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 176                 sleep(6);
 177                 exit (0);
 178         }
 179         setsid ();
 180         umask (007);
 181         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 182
 183         rlimit rl;
 184         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 185         {
 186                 log(DEFAULT,"Failed to getrlimit()!");
 187                 return false;
 188         }
 189         else
 190         {
 191                 rl.rlim_cur = rl.rlim_max;
 192                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 193                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 194         }
 195
 196         return true;
 197 }
 198
 199 void InspIRCd::WritePID(const std::string &filename)
 200 {
 201         std::ofstream outfile(filename.c_str());
 202         if (outfile.is_open())
 203         {
 204                 outfile << getpid();
 205                 outfile.close();
 206         }
 207         else
 208         {
 209                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 210                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 211                 Exit(0);
 212         }
 213 }
 214
 215 std::string InspIRCd::GetRevision()
 216 {
 217         return REVISION;
 218 }
 219
 220 void InspIRCd::MakeLowerMap()
 221 {
 222         // initialize the lowercase mapping table
 223         for (unsigned int cn = 0; cn < 256; cn++)
 224                 lowermap[cn] = cn;
 225         // lowercase the uppercase chars
 226         for (unsigned int cn = 65; cn < 91; cn++)
 227                 lowermap[cn] = tolower(cn);
 228         // now replace the specific chars for scandanavian comparison
 229         lowermap[(unsigned)'['] = '{';
 230         lowermap[(unsigned)']'] = '}';
 231         lowermap[(unsigned)'\\'] = '|';
 232 }
 233
 234 InspIRCd::InspIRCd(int argc, char** argv)
 235 {
 236         this->Start();
 237         module_sockets.clear();
 238         this->startup_time = time(NULL);
 239         srand(time(NULL));
 240         log(DEBUG,"*** InspIRCd starting up!");
 241         if (!FileExists(CONFIG_FILE))
 242         {
 243                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 244                 log(DEFAULT,"main: no config");
 245                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 246                 Exit(ERROR);
 247         }
 248         *LOG_FILE = 0;
 249         if (argc > 1) {
 250                 for (int i = 1; i < argc; i++)
 251                 {
 252                         if (!strcmp(argv[i],"-nofork"))
 253                         {
 254                                 Config->nofork = true;
 255                         }
 256                         else if(!strcmp(argv[i],"-debug"))
 257                         {
 258                                 Config->forcedebug = true;
 259                         }
 260                         else if(!strcmp(argv[i],"-nolog"))
 261                         {
 262                                 Config->writelog = false;
 263                         }
 264                         else if (!strcmp(argv[i],"-wait"))
 265                         {
 266                                 sleep(6);
 267                         }
 268                         else if (!strcmp(argv[i],"-nolimit"))
 269                         {
 270                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 271                         }
 272                         else if (!strcmp(argv[i],"-logfile"))
 273                         {
 274                                 if (argc > i+1)
 275                                 {
 276                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 277                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 278                                 }
 279                                 else
 280                                 {
 281                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 282                                         Exit(ERROR);
 283                                 }
 284                         }
 285                 }
 286         }
 287
 288         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 289
 290         this->MakeLowerMap();
 291
 292         OpenLog(argv, argc);
 293         this->stats = new serverstats();
 294         this->Parser = new CommandParser();
 295         Config->ClearStack();
 296         Config->Read(true,NULL);
 297         CheckRoot();
 298         this->ModeGrok = new ModeParser();
 299         AddServerName(Config->ServerName);
 300         CheckDie();
 301         InitializeDisabledCommands(Config->DisabledCommands, this);
 302         stats->BoundPortCount = BindPorts(true);
 303
 304         for(int t = 0; t < 255; t++)
 305                 Config->global_implementation[t] = 0;
 306
 307         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 308
 309         printf("\n");
 310         this->SetSignals();
 311         if (!Config->nofork)
 312         {
 313                 if (!this->DaemonSeed())
 314                 {
 315                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 316                         Exit(ERROR);
 317                 }
 318         }
 319
 320         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 321          * initialize the socket engine.
 322          */
 323         SocketEngineFactory* SEF = new SocketEngineFactory();
 324         SE = SEF->Create();
 325         delete SEF;
 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         char dnsengine[] = "singlethread-object";
 336         if (*Config->CustomVersion)
 337         {
 338                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 339         }
 340         else
 341         {
 342                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 343         }
 344         return versiondata;
 345 }
 346
 347 char* InspIRCd::ModuleError()
 348 {
 349         return MODERR;
 350 }
 351
 352 void InspIRCd::EraseFactory(int j)
 353 {
 354         int v = 0;
 355         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 356         {
 357                 if (v == j)
 358                 {
 359                         factory.erase(t);
 360                         factory.push_back(NULL);
 361                         return;
 362                 }
 363                 v++;
 364         }
 365 }
 366
 367 void InspIRCd::EraseModule(int j)
 368 {
 369         int v1 = 0;
 370         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 371         {
 372                 if (v1 == j)
 373                 {
 374                         DELETE(*m);
 375                         modules.erase(m);
 376                         modules.push_back(NULL);
 377                         break;
 378                 }
 379                 v1++;
 380         }
 381         int v2 = 0;
 382         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 383         {
 384                 if (v2 == j)
 385                 {
 386                        Config->module_names.erase(v);
 387                        break;
 388                 }
 389                 v2++;
 390         }
 391
 392 }
 393
 394 void InspIRCd::MoveTo(std::string modulename,int slot)
 395 {
 396         unsigned int v2 = 256;
 397         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 398         {
 399                 if (Config->module_names[v] == modulename)
 400                 {
 401                         // found an instance, swap it with the item at MODCOUNT
 402                         v2 = v;
 403                         break;
 404                 }
 405         }
 406         if ((v2 != (unsigned int)slot) && (v2 < 256))
 407         {
 408                 // Swap the module names over
 409                 Config->module_names[v2] = Config->module_names[slot];
 410                 Config->module_names[slot] = modulename;
 411                 // now swap the module factories
 412                 ircd_module* temp = factory[v2];
 413                 factory[v2] = factory[slot];
 414                 factory[slot] = temp;
 415                 // now swap the module objects
 416                 Module* temp_module = modules[v2];
 417                 modules[v2] = modules[slot];
 418                 modules[slot] = temp_module;
 419                 // now swap the implement lists (we dont
 420                 // need to swap the global or recount it)
 421                 for (int n = 0; n < 255; n++)
 422                 {
 423                         char x = Config->implement_lists[v2][n];
 424                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 425                         Config->implement_lists[slot][n] = x;
 426                 }
 427         }
 428         else
 429         {
 430                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 431         }
 432 }
 433
 434 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 435 {
 436         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 437         {
 438                 if (Config->module_names[v] == after)
 439                 {
 440                         MoveTo(modulename, v);
 441                         return;
 442                 }
 443         }
 444 }
 445
 446 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 447 {
 448         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 449         {
 450                 if (Config->module_names[v] == before)
 451                 {
 452                         if (v > 0)
 453                         {
 454                                 MoveTo(modulename, v-1);
 455                         }
 456                         else
 457                         {
 458                                 MoveTo(modulename, v);
 459                         }
 460                         return;
 461                 }
 462         }
 463 }
 464
 465 void InspIRCd::MoveToFirst(std::string modulename)
 466 {
 467         MoveTo(modulename,0);
 468 }
 469
 470 void InspIRCd::MoveToLast(std::string modulename)
 471 {
 472         MoveTo(modulename,MODCOUNT);
 473 }
 474
 475 void InspIRCd::BuildISupport()
 476 {
 477         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 478         std::stringstream v;
 479         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 480         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 481         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 482         Config->data005 = v.str();
 483         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 484 }
 485
 486 bool InspIRCd::UnloadModule(const char* filename)
 487 {
 488         std::string filename_str = filename;
 489         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 490         {
 491                 if (Config->module_names[j] == filename_str)
 492                 {
 493                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 494                         {
 495                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 496                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 497                                 return false;
 498                         }
 499                         /* Give the module a chance to tidy out all its metadata */
 500                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 501                         {
 502                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 503                         }
 504                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 505                         {
 506                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 507                         }
 508
 509                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 510
 511                         for(int t = 0; t < 255; t++)
 512                         {
 513                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 514                         }
 515
 516                         /* We have to renumber implement_lists after unload because the module numbers change!
 517                          */
 518                         for(int j2 = j; j2 < 254; j2++)
 519                         {
 520                                 for(int t = 0; t < 255; t++)
 521                                 {
 522                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 523                                 }
 524                         }
 525
 526                         // found the module
 527                         log(DEBUG,"Deleting module...");
 528                         this->EraseModule(j);
 529                         log(DEBUG,"Erasing module entry...");
 530                         this->EraseFactory(j);
 531                         log(DEBUG,"Removing dependent commands...");
 532                         Parser->RemoveCommands(filename);
 533                         log(DEFAULT,"Module %s unloaded",filename);
 534                         MODCOUNT--;
 535                         BuildISupport();
 536                         return true;
 537                 }
 538         }
 539         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 540         snprintf(MODERR,MAXBUF,"Module not loaded");
 541         return false;
 542 }
 543
 544 bool InspIRCd::LoadModule(const char* filename)
 545 {
 546         char modfile[MAXBUF];
 547 #ifdef STATIC_LINK
 548         strlcpy(modfile,filename,MAXBUF);
 549 #else
 550         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 551 #endif
 552         std::string filename_str = filename;
 553 #ifndef STATIC_LINK
 554 #ifndef IS_CYGWIN
 555         if (!DirValid(modfile))
 556         {
 557                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 558                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 559                 return false;
 560         }
 561 #endif
 562 #endif
 563         log(DEBUG,"Loading module: %s",modfile);
 564 #ifndef STATIC_LINK
 565         if (FileExists(modfile))
 566         {
 567 #endif
 568                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 569                 {
 570                         if (Config->module_names[j] == filename_str)
 571                         {
 572                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 573                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 574                                 return false;
 575                         }
 576                 }
 577                 ircd_module* a = new ircd_module(modfile);
 578                 factory[MODCOUNT+1] = a;
 579                 if (factory[MODCOUNT+1]->LastError())
 580                 {
 581                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 582                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 583                         return false;
 584                 }
 585                 try
 586                 {
 587                         if (factory[MODCOUNT+1]->factory)
 588                         {
 589                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 590                                 modules[MODCOUNT+1] = m;
 591                                 /* save the module and the module's classfactory, if
 592                                  * this isnt done, random crashes can occur :/ */
 593                                 Config->module_names.push_back(filename);
 594
 595                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 596                                 for(int t = 0; t < 255; t++)
 597                                         x[t] = 0;
 598
 599                                 modules[MODCOUNT+1]->Implements(x);
 600
 601                                 for(int t = 0; t < 255; t++)
 602                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 603                         }
 604                         else
 605                         {
 606                                 log(DEFAULT,"Unable to load %s",modfile);
 607                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 608                                 return false;
 609                         }
 610                 }
 611                 catch (ModuleException& modexcept)
 612                 {
 613                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 614                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 615                         return false;
 616                 }
 617 #ifndef STATIC_LINK
 618         }
 619         else
 620         {
 621                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 622                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 623                 return false;
 624         }
 625 #endif
 626         MODCOUNT++;
 627         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 628         // now work out which modules, if any, want to move to the back of the queue,
 629         // and if they do, move them there.
 630         std::vector<std::string> put_to_back;
 631         std::vector<std::string> put_to_front;
 632         std::map<std::string,std::string> put_before;
 633         std::map<std::string,std::string> put_after;
 634         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 635         {
 636                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 637                 {
 638                         put_to_back.push_back(Config->module_names[j]);
 639                 }
 640                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 641                 {
 642                         put_to_front.push_back(Config->module_names[j]);
 643                 }
 644                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 645                 {
 646                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 647                 }
 648                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 649                 {
 650                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 651                 }
 652         }
 653         for (unsigned int j = 0; j < put_to_back.size(); j++)
 654         {
 655                 MoveToLast(put_to_back[j]);
 656         }
 657         for (unsigned int j = 0; j < put_to_front.size(); j++)
 658         {
 659                 MoveToFirst(put_to_front[j]);
 660         }
 661         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 662         {
 663                 MoveBefore(j->first,j->second);
 664         }
 665         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 666         {
 667                 MoveAfter(j->first,j->second);
 668         }
 669         BuildISupport();
 670         return true;
 671 }
 672
 673 void InspIRCd::DoOneIteration(bool process_module_sockets)
 674 {
 675         int activefds[MAX_DESCRIPTORS];
 676         int incomingSockfd;
 677         int in_port;
 678         userrec* cu = NULL;
 679         InspSocket* s = NULL;
 680         InspSocket* s_del = NULL;
 681         unsigned int numberactive;
 682         insp_sockaddr sock_us;     // our port number
 683         socklen_t uslen;         // length of our port number
 684
 685         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 686          * Once per loop iteration is pleanty.
 687          */
 688         OLDTIME = TIME;
 689         TIME = time(NULL);
 690
 691         /* Run background module timers every few seconds
 692          * (the docs say modules shouldnt rely on accurate
 693          * timing using this event, so we dont have to
 694          * time this exactly).
 695          */
 696         if (((TIME % 5) == 0) && (!expire_run))
 697         {
 698                 expire_lines();
 699                 if (process_module_sockets)
 700                 {
 701                         /* Fix by brain - the addition of DoOneIteration means that this
 702                          * can end up getting called recursively in the following pattern:
 703                          *
 704                          * m_spanningtree DoPingChecks
 705                          * (server pings out and is squit)
 706                          * (squit causes call to DoOneIteration)
 707                          * DoOneIteration enters here
 708                          * calls DoBackground timer
 709                          * enters m_spanningtree DoPingChecks... see step 1.
 710                          *
 711                          * This should do the job and fix the bug.
 712                          */
 713                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 714                 }
 715                 TickMissedTimers(TIME);
 716                 expire_run = true;
 717                 return;
 718         }
 719         else if ((TIME % 5) == 1)
 720         {
 721                 expire_run = false;
 722         }
 723
 724         if (iterations++ == 15)
 725         {
 726                 iterations = 0;
 727                 DoBackgroundUserStuff(TIME);
 728         }
 729
 730         /* Once a second, do the background processing */
 731         if (TIME != OLDTIME)
 732         {
 733                 if (TIME < OLDTIME)
 734                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 735                 if ((TIME % 3600) == 0)
 736                 {
 737                         MaintainWhoWas(TIME);
 738                 }
 739         }
 740
 741         /* Process timeouts on module sockets each time around
 742          * the loop. There shouldnt be many module sockets, at
 743          * most, 20 or so, so this won't be much of a performance
 744          * hit at all.
 745          */
 746         if (process_module_sockets)
 747                 DoSocketTimeouts(TIME);
 748
 749         TickTimers(TIME);
 750
 751         /* Call the socket engine to wait on the active
 752          * file descriptors. The socket engine has everything's
 753          * descriptors in its list... dns, modules, users,
 754          * servers... so its nice and easy, just one call.
 755          */
 756         if (!(numberactive = SE->Wait(activefds)))
 757                 return;
 758
 759         /**
 760          * Now process each of the fd's. For users, we have a fast
 761          * lookup table which can find a user by file descriptor, so
 762          * processing them by fd isnt expensive. If we have a lot of
 763          * listening ports or module sockets though, things could get
 764          * ugly.
 765          */
 766         log(DEBUG,"There are %d fd's to process.",numberactive);
 767
 768         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 769         {
 770                 int socket_type = SE->GetType(activefds[activefd]);
 771                 switch (socket_type)
 772                 {
 773                         case X_ESTAB_CLIENT:
 774
 775                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 776                                 cu = fd_ref_table[activefds[activefd]];
 777                                 if (cu)
 778                                         ProcessUser(cu);
 779
 780                         break;
 781
 782                         case X_ESTAB_MODULE:
 783
 784                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 785
 786                                 if (!process_module_sockets)
 787                                         break;
 788
 789                                 /* Process module-owned sockets.
 790                                  * Modules are encouraged to inherit their sockets from
 791                                  * InspSocket so we can process them neatly like this.
 792                                  */
 793                                 s = socket_ref[activefds[activefd]];
 794
 795                                 if ((s) && (!s->Poll()))
 796                                 {
 797                                         log(DEBUG,"Socket poll returned false, close and bail");
 798                                         SE->DelFd(s->GetFd());
 799                                         socket_ref[activefds[activefd]] = NULL;
 800                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 801                                         {
 802                                                 s_del = *a;
 803                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 804                                                 {
 805                                                         module_sockets.erase(a);
 806                                                         break;
 807                                                 }
 808                                         }
 809                                         s->Close();
 810                                         DELETE(s);
 811                                 }
 812                                 else if (!s)
 813                                 {
 814                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 815                                         SE->DelFd(s->GetFd());
 816                                 }
 817                         break;
 818
 819                         case X_ESTAB_DNS:
 820                                 /* Handles instances of the Resolver class,
 821                                  * a simple class extended by modules for
 822                                  * nonblocking resolving of addresses.
 823                                  */
 824
 825                                 dns_deal_with_classes(activefds[activefd]);
 826                         break;
 827
 828                         case X_LISTEN:
 829
 830                                 log(DEBUG,"Type: X_LISTEN_MODULE: fd=%d",activefds[activefd]);
 831
 832                                 /* It's a listener */
 833                                 uslen = sizeof(sock_us);
 834                                 length = sizeof(client);
 835                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 836
 837                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 838                                 {
 839 #ifdef IPV6
 840                                         in_port = ntohs(sock_us.sin6_port);
 841 #else
 842                                         in_port = ntohs(sock_us.sin_port);
 843 #endif
 844                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 845                                         /* Years and years ago, we used to resolve here
 846                                          * using gethostbyaddr(). That is sucky and we
 847                                          * don't do that any more...
 848                                          */
 849                                         NonBlocking(incomingSockfd);
 850                                         if (Config->GetIOHook(in_port))
 851                                         {
 852                                                 try
 853                                                 {
 854 #ifdef IPV6
 855                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 856 #else
 857                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 858 #endif
 859                                                 }
 860                                                 catch (ModuleException& modexcept)
 861                                                 {
 862                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 863                                                 }
 864                                         }
 865                                         stats->statsAccept++;
 866 #ifdef IPV6
 867                                         AddClient(incomingSockfd, in_port, false, client.sin6_addr);
 868 #else
 869                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 870 #endif
 871                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 872                                 }
 873                                 else
 874                                 {
 875                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 876                                         shutdown(incomingSockfd,2);
 877                                         close(incomingSockfd);
 878                                         stats->statsRefused++;
 879                                 }
 880                         break;
 881
 882                         default:
 883                                 /* Something went wrong if we're in here.
 884                                  * In fact, so wrong, im not quite sure
 885                                  * what we would do, so for now, its going
 886                                  * to safely do bugger all.
 887                                  */
 888                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 889                                 SE->DelFd(activefds[activefd]);
 890                         break;
 891                 }
 892         }
 893 }
 894
 895 int InspIRCd::Run()
 896 {
 897         /* Until THIS point, ServerInstance == NULL */
 898
 899         init_dns();
 900
 901         LoadAllModules(this);
 902
 903         /* Just in case no modules were loaded - fix for bug #101 */
 904         this->BuildISupport();
 905
 906         printf("\nInspIRCd is now running!\n");
 907
 908         if (!Config->nofork)
 909         {
 910                 fclose(stdout);
 911                 fclose(stderr);
 912                 fclose(stdin);
 913         }
 914
 915         /* Add the listening sockets used for client inbound connections
 916          * to the socket engine
 917          */
 918         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 919                 SE->AddFd(Config->openSockfd[count],true,X_LISTEN);
 920
 921         this->WritePID(Config->PID);
 922
 923         /* main loop, this never returns */
 924         expire_run = false;
 925         iterations = 0;
 926
 927         while (true)
 928         {
 929                 DoOneIteration(true);
 930         }
 931         /* This is never reached -- we hope! */
 932         return 0;
 933 }
 934
 935 /**********************************************************************************/
 936
 937 /**
 938  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 939  */
 940
 941 int main(int argc, char** argv)
 942 {
 943         /* TEST SUITE FOR TOKENSTREAM
 944          *
 945          * Expected output:
 946          *
 947          * String: 'PRIVMSG #test FOO BAR'
 948          * Token 0 = 'PRIVMSG'
 949          * Token 1 = '#test'
 950          * Token 2 = 'FOO'
 951          * Token 3 = 'BAR'
 952          * String: 'PRIVMSG #test :FOO BAR BAZ'
 953          * Token 0 = 'PRIVMSG'
 954          * Token 1 = '#test'
 955          * Token 2 = 'FOO BAR BAZ'
 956          * String: ':PRIVMSG #test :FOO BAR BAZ'
 957          * Token 0 = ':PRIVMSG'
 958          * String: 'AAAAAAA'
 959          * Token 0 = 'AAAAAAA'
 960          * String: ''
 961          * NumItems = 0
 962          *
 963         std::string a = "PRIVMSG #test FOO BAR";
 964         printf("String: '%s'\n",a.c_str());
 965         irc::tokenstream test(a);
 966         printf("Token 0 = '%s'\n",test.GetToken().c_str());
 967         printf("Token 1 = '%s'\n",test.GetToken().c_str());
 968         printf("Token 2 = '%s'\n",test.GetToken().c_str());
 969         printf("Token 3 = '%s'\n",test.GetToken().c_str());
 970         printf("Token 4 = '%s'\n",test.GetToken().c_str());
 971
 972         std::string b = "PRIVMSG #test :FOO BAR BAZ";
 973         printf("String: '%s'\n",b.c_str());
 974         irc::tokenstream test2(b);
 975         printf("Token 0 = '%s'\n",test2.GetToken().c_str());
 976         printf("Token 1 = '%s'\n",test2.GetToken().c_str());
 977         printf("Token 2 = '%s'\n",test2.GetToken().c_str());
 978         printf("Token 3 = '%s'\n",test2.GetToken().c_str());
 979
 980         std::string c = ":PRIVMSG #test :FOO BAR BAZ";
 981         printf("String: '%s'\n",c.c_str());
 982         irc::tokenstream test3(c);
 983         printf("Token 0 = '%s'\n",test3.GetToken().c_str());
 984
 985         c = "AAAAAAA";
 986         printf("String: '%s'\n",c.c_str());
 987         irc::tokenstream test4(c);
 988         printf("Token 0 = '%s'\n",test4.GetToken().c_str());
 989         printf("Token 1 = '%s'\n",test4.GetToken().c_str());
 990
 991         c = "";
 992         printf("String: '%s'\n",c.c_str());
 993         irc::tokenstream test5(c);
 994         printf("Token 0 = '%s'\n",test5.GetToken().c_str());
 995
 996         exit(0);
 997         */
 998         try
 999         {
1000                 ServerInstance = new InspIRCd(argc, argv);
1001                 ServerInstance->Run();
1002                 DELETE(ServerInstance);
1003         }
1004         catch (std::bad_alloc)
1005         {
1006                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
1007                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
1008                 printf("Out of memory! (got exception std::bad_alloc!");
1009         }
1010         return 0;
1011 }