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 "inspircd.h"
  31 #include "configreader.h"
  32 #include <signal.h>
  33 #include <time.h>
  34 #include <string>
  35 #include <exception>
  36 #include <stdexcept>
  37 #include <new>
  38 #include <map>
  39 #include <sstream>
  40 #include <fstream>
  41 #include <vector>
  42 #include <deque>
  43 #include "modules.h"
  44 #include "mode.h"
  45 #include "xline.h"
  46 #include "socketengine.h"
  47 #include "inspircd_se_config.h"
  48 #include "socket.h"
  49 #include "typedefs.h"
  50 #include "command_parse.h"
  51
  52 using irc::sockets::NonBlocking;
  53 using irc::sockets::insp_ntoa;
  54 using irc::sockets::insp_inaddr;
  55 using irc::sockets::insp_sockaddr;
  56
  57 char lowermap[255];
  58
  59 InspIRCd* SI = NULL;
  60
  61 void InspIRCd::AddServerName(const std::string &servername)
  62 {
  63         this->Log(DEBUG,"Adding server name: %s",servername.c_str());
  64
  65         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  66                 servernames.push_back(servername); /* Wasn't already there. */
  67 }
  68
  69 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  70 {
  71         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  72
  73         if(iter == servernames.end())
  74         {
  75                 AddServerName(servername);
  76                 iter = --servernames.end();
  77         }
  78
  79         return iter->c_str();
  80 }
  81
  82 bool InspIRCd::FindServerName(const std::string &servername)
  83 {
  84         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
  85 }
  86
  87 void InspIRCd::Exit(int status)
  88 {
  89         exit (status);
  90 }
  91
  92 void InspIRCd::Start()
  93 {
  94         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
  95         printf("(C) ChatSpike Development team.\033[0m\n\n");
  96         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
  97         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
  98         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
  99 }
 100
 101 void InspIRCd::Rehash(int status)
 102 {
 103         SI->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
 104         fclose(SI->Config->log_file);
 105         SI->OpenLog(NULL,0);
 106         SI->Config->Read(false,NULL);
 107         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(""));
 108 }
 109
 110 void InspIRCd::SetSignals(bool SEGVHandler)
 111 {
 112         signal (SIGALRM, SIG_IGN);
 113         signal (SIGHUP, InspIRCd::Rehash);
 114         signal (SIGPIPE, SIG_IGN);
 115         signal (SIGTERM, InspIRCd::Exit);
 116 }
 117
 118 bool InspIRCd::DaemonSeed()
 119 {
 120         int childpid;
 121         if ((childpid = fork ()) < 0)
 122                 return (ERROR);
 123         else if (childpid > 0)
 124         {
 125                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 126                 sleep(6);
 127                 exit (0);
 128         }
 129         setsid ();
 130         umask (007);
 131         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 132
 133         rlimit rl;
 134         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 135         {
 136                 this->Log(DEFAULT,"Failed to getrlimit()!");
 137                 return false;
 138         }
 139         else
 140         {
 141                 rl.rlim_cur = rl.rlim_max;
 142                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 143                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 144         }
 145
 146         return true;
 147 }
 148
 149 void InspIRCd::WritePID(const std::string &filename)
 150 {
 151         std::ofstream outfile(filename.c_str());
 152         if (outfile.is_open())
 153         {
 154                 outfile << getpid();
 155                 outfile.close();
 156         }
 157         else
 158         {
 159                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 160                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 161                 Exit(0);
 162         }
 163 }
 164
 165 std::string InspIRCd::GetRevision()
 166 {
 167         return REVISION;
 168 }
 169
 170 InspIRCd::InspIRCd(int argc, char** argv)
 171         : ModCount(-1), duration_m(60), duration_h(60*60), duration_d(60*60*24), duration_w(60*60*24*7), duration_y(60*60*24*365)
 172 {
 173         bool SEGVHandler = false;
 174         //ServerInstance = this;
 175
 176         modules.resize(255);
 177         factory.resize(255);
 178
 179         this->Config = new ServerConfig(this);
 180         this->Start();
 181         this->module_sockets.clear();
 182         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 183         srand(this->TIME);
 184         this->Log(DEBUG,"*** InspIRCd starting up!");
 185         if (!ServerConfig::FileExists(CONFIG_FILE))
 186         {
 187                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 188                 this->Log(DEFAULT,"main: no config");
 189                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 190                 Exit(ERROR);
 191         }
 192         *this->LogFileName = 0;
 193         if (argc > 1) {
 194                 for (int i = 1; i < argc; i++)
 195                 {
 196                         if (!strcmp(argv[i],"-nofork"))
 197                         {
 198                                 Config->nofork = true;
 199                         }
 200                         else if(!strcmp(argv[i],"-debug"))
 201                         {
 202                                 Config->forcedebug = true;
 203                         }
 204                         else if(!strcmp(argv[i],"-nolog"))
 205                         {
 206                                 Config->writelog = false;
 207                         }
 208                         else if (!strcmp(argv[i],"-wait"))
 209                         {
 210                                 sleep(6);
 211                         }
 212                         else if (!strcmp(argv[i],"-nolimit"))
 213                         {
 214                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 215                         }
 216                         else if (!strcmp(argv[i],"-notraceback"))
 217                         {
 218                                 SEGVHandler = false;
 219                         }
 220                         else if (!strcmp(argv[i],"-logfile"))
 221                         {
 222                                 if (argc > i+1)
 223                                 {
 224                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 225                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 226                                 }
 227                                 else
 228                                 {
 229                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 230                                         Exit(ERROR);
 231                                 }
 232                                 i++;
 233                         }
 234                         else
 235                         {
 236                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 237                                 Exit(ERROR);
 238                         }
 239                 }
 240         }
 241
 242         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 243
 244         this->MakeLowerMap();
 245
 246         OpenLog(argv, argc);
 247         this->stats = new serverstats();
 248         this->Parser = new CommandParser(this);
 249         this->Timers = new TimerManager();
 250         this->XLines = new XLineManager(this);
 251         Config->ClearStack();
 252         Config->Read(true, NULL);
 253         this->CheckRoot();
 254         this->Modes = new ModeParser(this);
 255         this->AddServerName(Config->ServerName);
 256         CheckDie();
 257         InitializeDisabledCommands(Config->DisabledCommands, this);
 258         stats->BoundPortCount = BindPorts(true);
 259
 260         for(int t = 0; t < 255; t++)
 261                 Config->global_implementation[t] = 0;
 262
 263         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 264
 265         printf("\n");
 266         this->SetSignals(SEGVHandler);
 267         if (!Config->nofork)
 268         {
 269                 if (!this->DaemonSeed())
 270                 {
 271                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 272                         Exit(ERROR);
 273                 }
 274         }
 275
 276         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 277          * initialize the socket engine.
 278          */
 279         SocketEngineFactory* SEF = new SocketEngineFactory();
 280         SE = SEF->Create(this);
 281         delete SEF;
 282
 283         this->Res = new DNS(this);
 284
 285         this->Log(DEBUG,"RES: %08x",this->Res);
 286
 287         this->LoadAllModules();
 288
 289         /* Just in case no modules were loaded - fix for bug #101 */
 290         this->BuildISupport();
 291
 292         if (!stats->BoundPortCount)
 293         {
 294                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 295                 Exit(ERROR);
 296         }
 297
 298         /* Add the listening sockets used for client inbound connections
 299          * to the socket engine
 300          */
 301         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 302         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 303         {
 304                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 305                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 306                 {
 307                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 308                         Exit(ERROR);
 309                 }
 310         }
 311
 312         if (!Config->nofork)
 313         {
 314                 fclose(stdout);
 315                 fclose(stderr);
 316                 fclose(stdin);
 317         }
 318
 319         printf("\nInspIRCd is now running!\n");
 320
 321         this->WritePID(Config->PID);
 322
 323         /* main loop, this never returns */
 324         expire_run = false;
 325         iterations = 0;
 326
 327         return;
 328 }
 329
 330 std::string InspIRCd::GetVersionString()
 331 {
 332         char versiondata[MAXBUF];
 333         char dnsengine[] = "singlethread-object";
 334         if (*Config->CustomVersion)
 335         {
 336                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 337         }
 338         else
 339         {
 340                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 341         }
 342         return versiondata;
 343 }
 344
 345 char* InspIRCd::ModuleError()
 346 {
 347         return MODERR;
 348 }
 349
 350 void InspIRCd::EraseFactory(int j)
 351 {
 352         int v = 0;
 353         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 354         {
 355                 if (v == j)
 356                 {
 357                         factory.erase(t);
 358                         factory.push_back(NULL);
 359                         return;
 360                 }
 361                 v++;
 362         }
 363 }
 364
 365 void InspIRCd::EraseModule(int j)
 366 {
 367         int v1 = 0;
 368         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 369         {
 370                 if (v1 == j)
 371                 {
 372                         DELETE(*m);
 373                         modules.erase(m);
 374                         modules.push_back(NULL);
 375                         break;
 376                 }
 377                 v1++;
 378         }
 379         int v2 = 0;
 380         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 381         {
 382                 if (v2 == j)
 383                 {
 384                        Config->module_names.erase(v);
 385                        break;
 386                 }
 387                 v2++;
 388         }
 389
 390 }
 391
 392 void InspIRCd::MoveTo(std::string modulename,int slot)
 393 {
 394         unsigned int v2 = 256;
 395         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 396         {
 397                 if (Config->module_names[v] == modulename)
 398                 {
 399                         // found an instance, swap it with the item at the end
 400                         v2 = v;
 401                         break;
 402                 }
 403         }
 404         if ((v2 != (unsigned int)slot) && (v2 < 256))
 405         {
 406                 // Swap the module names over
 407                 Config->module_names[v2] = Config->module_names[slot];
 408                 Config->module_names[slot] = modulename;
 409                 // now swap the module factories
 410                 ircd_module* temp = factory[v2];
 411                 factory[v2] = factory[slot];
 412                 factory[slot] = temp;
 413                 // now swap the module objects
 414                 Module* temp_module = modules[v2];
 415                 modules[v2] = modules[slot];
 416                 modules[slot] = temp_module;
 417                 // now swap the implement lists (we dont
 418                 // need to swap the global or recount it)
 419                 for (int n = 0; n < 255; n++)
 420                 {
 421                         char x = Config->implement_lists[v2][n];
 422                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 423                         Config->implement_lists[slot][n] = x;
 424                 }
 425         }
 426         else
 427         {
 428                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 429         }
 430 }
 431
 432 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 433 {
 434         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 435         {
 436                 if (Config->module_names[v] == after)
 437                 {
 438                         MoveTo(modulename, v);
 439                         return;
 440                 }
 441         }
 442 }
 443
 444 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 445 {
 446         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 447         {
 448                 if (Config->module_names[v] == before)
 449                 {
 450                         if (v > 0)
 451                         {
 452                                 MoveTo(modulename, v-1);
 453                         }
 454                         else
 455                         {
 456                                 MoveTo(modulename, v);
 457                         }
 458                         return;
 459                 }
 460         }
 461 }
 462
 463 void InspIRCd::MoveToFirst(std::string modulename)
 464 {
 465         MoveTo(modulename,0);
 466 }
 467
 468 void InspIRCd::MoveToLast(std::string modulename)
 469 {
 470         MoveTo(modulename,this->GetModuleCount());
 471 }
 472
 473 void InspIRCd::BuildISupport()
 474 {
 475         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 476         std::stringstream v;
 477         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 478         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 479         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 480         Config->data005 = v.str();
 481         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 482 }
 483
 484 bool InspIRCd::UnloadModule(const char* filename)
 485 {
 486         std::string filename_str = filename;
 487         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 488         {
 489                 if (Config->module_names[j] == filename_str)
 490                 {
 491                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 492                         {
 493                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 494                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 495                                 return false;
 496                         }
 497                         /* Give the module a chance to tidy out all its metadata */
 498                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 499                         {
 500                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 501                         }
 502                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 503                         {
 504                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 505                         }
 506
 507                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 508
 509                         for(int t = 0; t < 255; t++)
 510                         {
 511                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 512                         }
 513
 514                         /* We have to renumber implement_lists after unload because the module numbers change!
 515                          */
 516                         for(int j2 = j; j2 < 254; j2++)
 517                         {
 518                                 for(int t = 0; t < 255; t++)
 519                                 {
 520                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 521                                 }
 522                         }
 523
 524                         // found the module
 525                         this->Log(DEBUG,"Removing dependent commands...");
 526                         Parser->RemoveCommands(filename);
 527                         this->Log(DEBUG,"Deleting module...");
 528                         this->EraseModule(j);
 529                         this->Log(DEBUG,"Erasing module entry...");
 530                         this->EraseFactory(j);
 531                         this->Log(DEFAULT,"Module %s unloaded",filename);
 532                         this->ModCount--;
 533                         BuildISupport();
 534                         return true;
 535                 }
 536         }
 537         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 538         snprintf(MODERR,MAXBUF,"Module not loaded");
 539         return false;
 540 }
 541
 542 bool InspIRCd::LoadModule(const char* filename)
 543 {
 544         char modfile[MAXBUF];
 545 #ifdef STATIC_LINK
 546         strlcpy(modfile,filename,MAXBUF);
 547 #else
 548         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 549 #endif
 550         std::string filename_str = filename;
 551 #ifndef STATIC_LINK
 552 #ifndef IS_CYGWIN
 553         if (!ServerConfig::DirValid(modfile))
 554         {
 555                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 556                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 557                 return false;
 558         }
 559 #endif
 560 #endif
 561         this->Log(DEBUG,"Loading module: %s",modfile);
 562 #ifndef STATIC_LINK
 563         if (ServerConfig::FileExists(modfile))
 564         {
 565 #endif
 566                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 567                 {
 568                         if (Config->module_names[j] == filename_str)
 569                         {
 570                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 571                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 572                                 return false;
 573                         }
 574                 }
 575                 try
 576                 {
 577                         ircd_module* a = new ircd_module(this, modfile);
 578                         factory[this->ModCount+1] = a;
 579                         if (factory[this->ModCount+1]->LastError())
 580                         {
 581                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 582                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 583                                 return false;
 584                         }
 585                         if ((long)factory[this->ModCount+1]->factory != -1)
 586                         {
 587                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 588                                 modules[this->ModCount+1] = m;
 589                                 /* save the module and the module's classfactory, if
 590                                  * this isnt done, random crashes can occur :/ */
 591                                 Config->module_names.push_back(filename);
 592
 593                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 594                                 for(int t = 0; t < 255; t++)
 595                                         x[t] = 0;
 596
 597                                 modules[this->ModCount+1]->Implements(x);
 598
 599                                 for(int t = 0; t < 255; t++)
 600                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 601                         }
 602                         else
 603                         {
 604                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 605                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 606                                 return false;
 607                         }
 608                 }
 609                 catch (ModuleException& modexcept)
 610                 {
 611                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 612                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 613                         return false;
 614                 }
 615 #ifndef STATIC_LINK
 616         }
 617         else
 618         {
 619                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 620                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 621                 return false;
 622         }
 623 #endif
 624         this->ModCount++;
 625         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 626         // now work out which modules, if any, want to move to the back of the queue,
 627         // and if they do, move them there.
 628         std::vector<std::string> put_to_back;
 629         std::vector<std::string> put_to_front;
 630         std::map<std::string,std::string> put_before;
 631         std::map<std::string,std::string> put_after;
 632         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 633         {
 634                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 635                 {
 636                         put_to_back.push_back(Config->module_names[j]);
 637                 }
 638                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 639                 {
 640                         put_to_front.push_back(Config->module_names[j]);
 641                 }
 642                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 643                 {
 644                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 645                 }
 646                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 647                 {
 648                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 649                 }
 650         }
 651         for (unsigned int j = 0; j < put_to_back.size(); j++)
 652         {
 653                 MoveToLast(put_to_back[j]);
 654         }
 655         for (unsigned int j = 0; j < put_to_front.size(); j++)
 656         {
 657                 MoveToFirst(put_to_front[j]);
 658         }
 659         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 660         {
 661                 MoveBefore(j->first,j->second);
 662         }
 663         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 664         {
 665                 MoveAfter(j->first,j->second);
 666         }
 667         BuildISupport();
 668         return true;
 669 }
 670
 671 void InspIRCd::DoOneIteration(bool process_module_sockets)
 672 {
 673         int activefds[MAX_DESCRIPTORS];
 674         int incomingSockfd;
 675         int in_port;
 676         userrec* cu = NULL;
 677         InspSocket* s = NULL;
 678         InspSocket* s_del = NULL;
 679         unsigned int numberactive;
 680         insp_sockaddr sock_us;     // our port number
 681         socklen_t uslen;         // length of our port number
 682
 683         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 684          * Once per loop iteration is pleanty.
 685          */
 686         OLDTIME = TIME;
 687         TIME = time(NULL);
 688
 689         /* Run background module timers every few seconds
 690          * (the docs say modules shouldnt rely on accurate
 691          * timing using this event, so we dont have to
 692          * time this exactly).
 693          */
 694         if (((TIME % 5) == 0) && (!expire_run))
 695         {
 696                 XLines->expire_lines();
 697                 if (process_module_sockets)
 698                 {
 699                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 700                 }
 701                 Timers->TickMissedTimers(TIME);
 702                 expire_run = true;
 703                 return;
 704         }
 705         else if ((TIME % 5) == 1)
 706         {
 707                 expire_run = false;
 708         }
 709
 710         if (iterations++ == 15)
 711         {
 712                 iterations = 0;
 713                 this->DoBackgroundUserStuff(TIME);
 714         }
 715
 716         /* Once a second, do the background processing */
 717         if (TIME != OLDTIME)
 718         {
 719                 if (TIME < OLDTIME)
 720                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 721                 if ((TIME % 3600) == 0)
 722                 {
 723                         irc::whowas::MaintainWhoWas(TIME);
 724                 }
 725         }
 726
 727         /* Process timeouts on module sockets each time around
 728          * the loop. There shouldnt be many module sockets, at
 729          * most, 20 or so, so this won't be much of a performance
 730          * hit at all.
 731          */
 732         if (process_module_sockets)
 733                 this->DoSocketTimeouts(TIME);
 734
 735         Timers->TickTimers(TIME);
 736
 737         /* Call the socket engine to wait on the active
 738          * file descriptors. The socket engine has everything's
 739          * descriptors in its list... dns, modules, users,
 740          * servers... so its nice and easy, just one call.
 741          */
 742         if (!(numberactive = SE->Wait(activefds)))
 743                 return;
 744
 745         /**
 746          * Now process each of the fd's. For users, we have a fast
 747          * lookup table which can find a user by file descriptor, so
 748          * processing them by fd isnt expensive. If we have a lot of
 749          * listening ports or module sockets though, things could get
 750          * ugly.
 751          */
 752         this->Log(DEBUG,"There are %d fd's to process.",numberactive);
 753
 754         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 755         {
 756                 int socket_type = SE->GetType(activefds[activefd]);
 757                 switch (socket_type)
 758                 {
 759                         case X_ESTAB_CLIENT:
 760
 761                                 this->Log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 762                                 cu = this->fd_ref_table[activefds[activefd]];
 763                                 if (cu)
 764                                         this->ProcessUser(cu);
 765
 766                         break;
 767
 768                         case X_ESTAB_MODULE:
 769
 770                                 this->Log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 771
 772                                 if (!process_module_sockets)
 773                                         break;
 774
 775                                 /* Process module-owned sockets.
 776                                  * Modules are encouraged to inherit their sockets from
 777                                  * InspSocket so we can process them neatly like this.
 778                                  */
 779                                 s = this->socket_ref[activefds[activefd]];
 780
 781                                 if ((s) && (!s->Poll()))
 782                                 {
 783                                         this->Log(DEBUG,"Socket poll returned false, close and bail");
 784                                         SE->DelFd(s->GetFd());
 785                                         this->socket_ref[activefds[activefd]] = NULL;
 786                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 787                                         {
 788                                                 s_del = *a;
 789                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 790                                                 {
 791                                                         module_sockets.erase(a);
 792                                                         break;
 793                                                 }
 794                                         }
 795                                         s->Close();
 796                                         DELETE(s);
 797                                 }
 798                                 else if (!s)
 799                                 {
 800                                         this->Log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 801                                         SE->DelFd(s->GetFd());
 802                                 }
 803                         break;
 804
 805                         case X_ESTAB_DNS:
 806                                 /* Handles instances of the Resolver class,
 807                                  * a simple class extended by modules and the core for
 808                                  * nonblocking resolving of addresses.
 809                                  */
 810                                 this->Res->MarshallReads(activefds[activefd]);
 811                         break;
 812
 813                         case X_LISTEN:
 814
 815                                 this->Log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 816
 817                                 /* It's a listener */
 818                                 uslen = sizeof(sock_us);
 819                                 length = sizeof(client);
 820                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 821
 822                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 823                                 {
 824 #ifdef IPV6
 825                                         in_port = ntohs(sock_us.sin6_port);
 826 #else
 827                                         in_port = ntohs(sock_us.sin_port);
 828 #endif
 829                                         this->Log(DEBUG,"Accepted socket %d",incomingSockfd);
 830                                         /* Years and years ago, we used to resolve here
 831                                          * using gethostbyaddr(). That is sucky and we
 832                                          * don't do that any more...
 833                                          */
 834                                         NonBlocking(incomingSockfd);
 835                                         if (Config->GetIOHook(in_port))
 836                                         {
 837                                                 try
 838                                                 {
 839 #ifdef IPV6
 840                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 841 #else
 842                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 843 #endif
 844                                                 }
 845                                                 catch (ModuleException& modexcept)
 846                                                 {
 847                                                         this->Log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 848                                                 }
 849                                         }
 850                                         stats->statsAccept++;
 851 #ifdef IPV6
 852                                         this->Log(DEBUG,"Add ipv6 client");
 853                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin6_addr);
 854 #else
 855                                         this->Log(DEBUG,"Add ipv4 client");
 856                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin_addr);
 857 #endif
 858                                         this->Log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 859                                 }
 860                                 else
 861                                 {
 862                                         this->Log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 863                                         shutdown(incomingSockfd,2);
 864                                         close(incomingSockfd);
 865                                         stats->statsRefused++;
 866                                 }
 867                         break;
 868
 869                         default:
 870                                 /* Something went wrong if we're in here.
 871                                  * In fact, so wrong, im not quite sure
 872                                  * what we would do, so for now, its going
 873                                  * to safely do bugger all.
 874                                  */
 875                                 this->Log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 876                                 SE->DelFd(activefds[activefd]);
 877                         break;
 878                 }
 879         }
 880 }
 881
 882 bool InspIRCd::IsIdent(const char* n)
 883 {
 884         if (!n || !*n)
 885                 return false;
 886
 887         for (char* i = (char*)n; *i; i++)
 888         {
 889                 if ((*i >= 'A') && (*i <= '}'))
 890                 {
 891                         continue;
 892                 }
 893                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 894                 {
 895                         continue;
 896                 }
 897                 return false;
 898         }
 899         return true;
 900 }
 901
 902
 903 bool InspIRCd::IsNick(const char* n)
 904 {
 905         if (!n || !*n)
 906                 return false;
 907
 908         int p = 0;
 909         for (char* i = (char*)n; *i; i++, p++)
 910         {
 911                 /* "A"-"}" can occur anywhere in a nickname */
 912                 if ((*i >= 'A') && (*i <= '}'))
 913                 {
 914                         continue;
 915                 }
 916                 /* "0"-"9", "-" can occur anywhere BUT the first char of a nickname */
 917                 if ((((*i >= '0') && (*i <= '9')) || (*i == '-')) && (i > n))
 918                 {
 919                         continue;
 920                 }
 921                 /* invalid character! abort */
 922                 return false;
 923         }
 924         return (p < NICKMAX - 1);
 925 }
 926
 927 int InspIRCd::Run()
 928 {
 929         while (true)
 930         {
 931                 DoOneIteration(true);
 932         }
 933         /* This is never reached -- we hope! */
 934         return 0;
 935 }
 936
 937 /**********************************************************************************/
 938
 939 /**
 940  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 941  */
 942
 943 int main(int argc, char** argv)
 944 {
 945         SI = new InspIRCd(argc, argv);
 946         SI->Run();
 947         delete SI;
 948         return 0;
 949 }
 950
 951 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 952  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 953  * registration timeout maximum seconds)
 954  */
 955 bool InspIRCd::AllModulesReportReady(userrec* user)
 956 {
 957         if (!Config->global_implementation[I_OnCheckReady])
 958                 return true;
 959
 960         for (int i = 0; i <= this->GetModuleCount(); i++)
 961         {
 962                 if (Config->implement_lists[i][I_OnCheckReady])
 963                 {
 964                         int res = modules[i]->OnCheckReady(user);
 965                         if (!res)
 966                                 return false;
 967                 }
 968         }
 969         return true;
 970 }
 971
 972 int InspIRCd::GetModuleCount()
 973 {
 974         return this->ModCount;
 975 }
 976
 977 time_t InspIRCd::Time()
 978 {
 979         return TIME;
 980 }
 981