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