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 "mode.h"
  55 #include "commands.h"
  56 #include "xline.h"
  57 #include "inspstring.h"
  58 #include "helperfuncs.h"
  59 #include "hashcomp.h"
  60 #include "socketengine.h"
  61 #include "inspircd_se_config.h"
  62 #include "userprocess.h"
  63 #include "socket.h"
  64 #include "typedefs.h"
  65 #include "command_parse.h"
  66
  67 using irc::sockets::NonBlocking;
  68 using irc::sockets::insp_ntoa;
  69 using irc::sockets::insp_inaddr;
  70 using irc::sockets::insp_sockaddr;
  71
  72 InspIRCd* ServerInstance = NULL;
  73
  74 int iterations = 0;
  75
  76 insp_sockaddr client, server;
  77 socklen_t length;
  78
  79 char lowermap[255];
  80
  81 void InspIRCd::AddServerName(const std::string &servername)
  82 {
  83         this->Log(DEBUG,"Adding server name: %s",servername.c_str());
  84
  85         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  86                 servernames.push_back(servername); /* Wasn't already there. */
  87 }
  88
  89 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  90 {
  91         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  92
  93         if(iter == servernames.end())
  94         {
  95                 AddServerName(servername);
  96                 iter = --servernames.end();
  97         }
  98
  99         return iter->c_str();
 100 }
 101
 102 bool InspIRCd::FindServerName(const std::string &servername)
 103 {
 104         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 105 }
 106
 107 void InspIRCd::Exit(int status)
 108 {
 109         if (ServerInstance->Config->log_file)
 110                 fclose(ServerInstance->Config->log_file);
 111         ServerInstance->SendError("Server shutdown.");
 112         exit (status);
 113 }
 114
 115 void InspIRCd::Start()
 116 {
 117         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 118         printf("(C) ChatSpike Development team.\033[0m\n\n");
 119         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 120         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 121         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 122 }
 123
 124 void InspIRCd::Rehash(int status)
 125 {
 126         ServerInstance->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
 127         fclose(ServerInstance->Config->log_file);
 128         ServerInstance->OpenLog(NULL,0);
 129         ServerInstance->Config->Read(false,NULL);
 130         FOREACH_MOD(I_OnRehash,OnRehash(""));
 131 }
 132
 133 void InspIRCd::SetSignals(bool SEGVHandler)
 134 {
 135         signal (SIGALRM, SIG_IGN);
 136         signal (SIGHUP, InspIRCd::Rehash);
 137         signal (SIGPIPE, SIG_IGN);
 138         signal (SIGTERM, InspIRCd::Exit);
 139 }
 140
 141 bool InspIRCd::DaemonSeed()
 142 {
 143         int childpid;
 144         if ((childpid = fork ()) < 0)
 145                 return (ERROR);
 146         else if (childpid > 0)
 147         {
 148                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 149                 sleep(6);
 150                 exit (0);
 151         }
 152         setsid ();
 153         umask (007);
 154         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 155
 156         rlimit rl;
 157         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 158         {
 159                 this->Log(DEFAULT,"Failed to getrlimit()!");
 160                 return false;
 161         }
 162         else
 163         {
 164                 rl.rlim_cur = rl.rlim_max;
 165                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 166                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 167         }
 168
 169         return true;
 170 }
 171
 172 void InspIRCd::WritePID(const std::string &filename)
 173 {
 174         std::ofstream outfile(filename.c_str());
 175         if (outfile.is_open())
 176         {
 177                 outfile << getpid();
 178                 outfile.close();
 179         }
 180         else
 181         {
 182                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 183                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 184                 Exit(0);
 185         }
 186 }
 187
 188 std::string InspIRCd::GetRevision()
 189 {
 190         return REVISION;
 191 }
 192
 193 InspIRCd::InspIRCd(int argc, char** argv) : ModCount(-1)
 194 {
 195         bool SEGVHandler = false;
 196         ServerInstance = this;
 197
 198         modules.resize(255);
 199         factory.resize(255);
 200
 201         this->Config = new ServerConfig(this);
 202         this->Start();
 203         this->module_sockets.clear();
 204         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 205         srand(this->TIME);
 206         this->Log(DEBUG,"*** InspIRCd starting up!");
 207         if (!ServerConfig::FileExists(CONFIG_FILE))
 208         {
 209                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 210                 this->Log(DEFAULT,"main: no config");
 211                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 212                 Exit(ERROR);
 213         }
 214         *this->LogFileName = 0;
 215         if (argc > 1) {
 216                 for (int i = 1; i < argc; i++)
 217                 {
 218                         if (!strcmp(argv[i],"-nofork"))
 219                         {
 220                                 Config->nofork = true;
 221                         }
 222                         else if(!strcmp(argv[i],"-debug"))
 223                         {
 224                                 Config->forcedebug = true;
 225                         }
 226                         else if(!strcmp(argv[i],"-nolog"))
 227                         {
 228                                 Config->writelog = false;
 229                         }
 230                         else if (!strcmp(argv[i],"-wait"))
 231                         {
 232                                 sleep(6);
 233                         }
 234                         else if (!strcmp(argv[i],"-nolimit"))
 235                         {
 236                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 237                         }
 238                         else if (!strcmp(argv[i],"-notraceback"))
 239                         {
 240                                 SEGVHandler = false;
 241                         }
 242                         else if (!strcmp(argv[i],"-logfile"))
 243                         {
 244                                 if (argc > i+1)
 245                                 {
 246                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 247                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 248                                 }
 249                                 else
 250                                 {
 251                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 252                                         Exit(ERROR);
 253                                 }
 254                                 i++;
 255                         }
 256                         else
 257                         {
 258                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 259                                 Exit(ERROR);
 260                         }
 261                 }
 262         }
 263
 264         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 265
 266         this->MakeLowerMap();
 267
 268         OpenLog(argv, argc);
 269         this->stats = new serverstats();
 270         this->Parser = new CommandParser(this);
 271         this->Timers = new TimerManager();
 272         this->XLines = new XLineManager(this);
 273         Config->ClearStack();
 274         Config->Read(true, NULL);
 275         this->CheckRoot();
 276         this->ModeGrok = new ModeParser(this);
 277         this->AddServerName(Config->ServerName);
 278         CheckDie();
 279         InitializeDisabledCommands(Config->DisabledCommands, this);
 280         stats->BoundPortCount = BindPorts(true);
 281
 282         for(int t = 0; t < 255; t++)
 283                 Config->global_implementation[t] = 0;
 284
 285         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 286
 287         printf("\n");
 288         this->SetSignals(SEGVHandler);
 289         if (!Config->nofork)
 290         {
 291                 if (!this->DaemonSeed())
 292                 {
 293                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 294                         Exit(ERROR);
 295                 }
 296         }
 297
 298         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 299          * initialize the socket engine.
 300          */
 301         SocketEngineFactory* SEF = new SocketEngineFactory();
 302         SE = SEF->Create(this);
 303         delete SEF;
 304
 305         /* We must load the modules AFTER initializing the socket engine, now */
 306
 307         return;
 308 }
 309
 310 std::string InspIRCd::GetVersionString()
 311 {
 312         char versiondata[MAXBUF];
 313         char dnsengine[] = "singlethread-object";
 314         if (*Config->CustomVersion)
 315         {
 316                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 317         }
 318         else
 319         {
 320                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 321         }
 322         return versiondata;
 323 }
 324
 325 char* InspIRCd::ModuleError()
 326 {
 327         return MODERR;
 328 }
 329
 330 void InspIRCd::EraseFactory(int j)
 331 {
 332         int v = 0;
 333         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 334         {
 335                 if (v == j)
 336                 {
 337                         factory.erase(t);
 338                         factory.push_back(NULL);
 339                         return;
 340                 }
 341                 v++;
 342         }
 343 }
 344
 345 void InspIRCd::EraseModule(int j)
 346 {
 347         int v1 = 0;
 348         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 349         {
 350                 if (v1 == j)
 351                 {
 352                         DELETE(*m);
 353                         modules.erase(m);
 354                         modules.push_back(NULL);
 355                         break;
 356                 }
 357                 v1++;
 358         }
 359         int v2 = 0;
 360         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 361         {
 362                 if (v2 == j)
 363                 {
 364                        Config->module_names.erase(v);
 365                        break;
 366                 }
 367                 v2++;
 368         }
 369
 370 }
 371
 372 void InspIRCd::MoveTo(std::string modulename,int slot)
 373 {
 374         unsigned int v2 = 256;
 375         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 376         {
 377                 if (Config->module_names[v] == modulename)
 378                 {
 379                         // found an instance, swap it with the item at the end
 380                         v2 = v;
 381                         break;
 382                 }
 383         }
 384         if ((v2 != (unsigned int)slot) && (v2 < 256))
 385         {
 386                 // Swap the module names over
 387                 Config->module_names[v2] = Config->module_names[slot];
 388                 Config->module_names[slot] = modulename;
 389                 // now swap the module factories
 390                 ircd_module* temp = factory[v2];
 391                 factory[v2] = factory[slot];
 392                 factory[slot] = temp;
 393                 // now swap the module objects
 394                 Module* temp_module = modules[v2];
 395                 modules[v2] = modules[slot];
 396                 modules[slot] = temp_module;
 397                 // now swap the implement lists (we dont
 398                 // need to swap the global or recount it)
 399                 for (int n = 0; n < 255; n++)
 400                 {
 401                         char x = Config->implement_lists[v2][n];
 402                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 403                         Config->implement_lists[slot][n] = x;
 404                 }
 405         }
 406         else
 407         {
 408                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 409         }
 410 }
 411
 412 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 413 {
 414         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 415         {
 416                 if (Config->module_names[v] == after)
 417                 {
 418                         MoveTo(modulename, v);
 419                         return;
 420                 }
 421         }
 422 }
 423
 424 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 425 {
 426         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 427         {
 428                 if (Config->module_names[v] == before)
 429                 {
 430                         if (v > 0)
 431                         {
 432                                 MoveTo(modulename, v-1);
 433                         }
 434                         else
 435                         {
 436                                 MoveTo(modulename, v);
 437                         }
 438                         return;
 439                 }
 440         }
 441 }
 442
 443 void InspIRCd::MoveToFirst(std::string modulename)
 444 {
 445         MoveTo(modulename,0);
 446 }
 447
 448 void InspIRCd::MoveToLast(std::string modulename)
 449 {
 450         MoveTo(modulename,this->GetModuleCount());
 451 }
 452
 453 void InspIRCd::BuildISupport()
 454 {
 455         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 456         std::stringstream v;
 457         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 458         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 459         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 460         Config->data005 = v.str();
 461         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 462 }
 463
 464 bool InspIRCd::UnloadModule(const char* filename)
 465 {
 466         std::string filename_str = filename;
 467         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 468         {
 469                 if (Config->module_names[j] == filename_str)
 470                 {
 471                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 472                         {
 473                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 474                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 475                                 return false;
 476                         }
 477                         /* Give the module a chance to tidy out all its metadata */
 478                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 479                         {
 480                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 481                         }
 482                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 483                         {
 484                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 485                         }
 486
 487                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 488
 489                         for(int t = 0; t < 255; t++)
 490                         {
 491                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 492                         }
 493
 494                         /* We have to renumber implement_lists after unload because the module numbers change!
 495                          */
 496                         for(int j2 = j; j2 < 254; j2++)
 497                         {
 498                                 for(int t = 0; t < 255; t++)
 499                                 {
 500                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 501                                 }
 502                         }
 503
 504                         // found the module
 505                         this->Log(DEBUG,"Removing dependent commands...");
 506                         Parser->RemoveCommands(filename);
 507                         this->Log(DEBUG,"Deleting module...");
 508                         this->EraseModule(j);
 509                         this->Log(DEBUG,"Erasing module entry...");
 510                         this->EraseFactory(j);
 511                         this->Log(DEFAULT,"Module %s unloaded",filename);
 512                         this->ModCount--;
 513                         BuildISupport();
 514                         return true;
 515                 }
 516         }
 517         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 518         snprintf(MODERR,MAXBUF,"Module not loaded");
 519         return false;
 520 }
 521
 522 bool InspIRCd::LoadModule(const char* filename)
 523 {
 524         char modfile[MAXBUF];
 525 #ifdef STATIC_LINK
 526         strlcpy(modfile,filename,MAXBUF);
 527 #else
 528         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 529 #endif
 530         std::string filename_str = filename;
 531 #ifndef STATIC_LINK
 532 #ifndef IS_CYGWIN
 533         if (!ServerConfig::DirValid(modfile))
 534         {
 535                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 536                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 537                 return false;
 538         }
 539 #endif
 540 #endif
 541         this->Log(DEBUG,"Loading module: %s",modfile);
 542 #ifndef STATIC_LINK
 543         if (ServerConfig::FileExists(modfile))
 544         {
 545 #endif
 546                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 547                 {
 548                         if (Config->module_names[j] == filename_str)
 549                         {
 550                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 551                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 552                                 return false;
 553                         }
 554                 }
 555                 try
 556                 {
 557                         ircd_module* a = new ircd_module(this, modfile);
 558                         factory[this->ModCount+1] = a;
 559                         if (factory[this->ModCount+1]->LastError())
 560                         {
 561                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 562                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 563                                 return false;
 564                         }
 565                         if ((long)factory[this->ModCount+1]->factory != -1)
 566                         {
 567                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 568                                 modules[this->ModCount+1] = m;
 569                                 /* save the module and the module's classfactory, if
 570                                  * this isnt done, random crashes can occur :/ */
 571                                 Config->module_names.push_back(filename);
 572
 573                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 574                                 for(int t = 0; t < 255; t++)
 575                                         x[t] = 0;
 576
 577                                 modules[this->ModCount+1]->Implements(x);
 578
 579                                 for(int t = 0; t < 255; t++)
 580                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 581                         }
 582                         else
 583                         {
 584                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 585                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 586                                 return false;
 587                         }
 588                 }
 589                 catch (ModuleException& modexcept)
 590                 {
 591                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 592                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 593                         return false;
 594                 }
 595 #ifndef STATIC_LINK
 596         }
 597         else
 598         {
 599                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 600                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 601                 return false;
 602         }
 603 #endif
 604         this->ModCount++;
 605         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 606         // now work out which modules, if any, want to move to the back of the queue,
 607         // and if they do, move them there.
 608         std::vector<std::string> put_to_back;
 609         std::vector<std::string> put_to_front;
 610         std::map<std::string,std::string> put_before;
 611         std::map<std::string,std::string> put_after;
 612         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 613         {
 614                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 615                 {
 616                         put_to_back.push_back(Config->module_names[j]);
 617                 }
 618                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 619                 {
 620                         put_to_front.push_back(Config->module_names[j]);
 621                 }
 622                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 623                 {
 624                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 625                 }
 626                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 627                 {
 628                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 629                 }
 630         }
 631         for (unsigned int j = 0; j < put_to_back.size(); j++)
 632         {
 633                 MoveToLast(put_to_back[j]);
 634         }
 635         for (unsigned int j = 0; j < put_to_front.size(); j++)
 636         {
 637                 MoveToFirst(put_to_front[j]);
 638         }
 639         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 640         {
 641                 MoveBefore(j->first,j->second);
 642         }
 643         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 644         {
 645                 MoveAfter(j->first,j->second);
 646         }
 647         BuildISupport();
 648         return true;
 649 }
 650
 651 void InspIRCd::DoOneIteration(bool process_module_sockets)
 652 {
 653         int activefds[MAX_DESCRIPTORS];
 654         int incomingSockfd;
 655         int in_port;
 656         userrec* cu = NULL;
 657         InspSocket* s = NULL;
 658         InspSocket* s_del = NULL;
 659         unsigned int numberactive;
 660         insp_sockaddr sock_us;     // our port number
 661         socklen_t uslen;         // length of our port number
 662
 663         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 664          * Once per loop iteration is pleanty.
 665          */
 666         OLDTIME = TIME;
 667         TIME = time(NULL);
 668
 669         /* Run background module timers every few seconds
 670          * (the docs say modules shouldnt rely on accurate
 671          * timing using this event, so we dont have to
 672          * time this exactly).
 673          */
 674         if (((TIME % 5) == 0) && (!expire_run))
 675         {
 676                 XLines->expire_lines();
 677                 if (process_module_sockets)
 678                 {
 679                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 680                 }
 681                 Timers->TickMissedTimers(TIME);
 682                 expire_run = true;
 683                 return;
 684         }
 685         else if ((TIME % 5) == 1)
 686         {
 687                 expire_run = false;
 688         }
 689
 690         if (iterations++ == 15)
 691         {
 692                 iterations = 0;
 693                 this->DoBackgroundUserStuff(TIME);
 694         }
 695
 696         /* Once a second, do the background processing */
 697         if (TIME != OLDTIME)
 698         {
 699                 if (TIME < OLDTIME)
 700                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 701                 if ((TIME % 3600) == 0)
 702                 {
 703                         irc::whowas::MaintainWhoWas(TIME);
 704                 }
 705         }
 706
 707         /* Process timeouts on module sockets each time around
 708          * the loop. There shouldnt be many module sockets, at
 709          * most, 20 or so, so this won't be much of a performance
 710          * hit at all.
 711          */
 712         if (process_module_sockets)
 713                 this->DoSocketTimeouts(TIME);
 714
 715         Timers->TickTimers(TIME);
 716
 717         /* Call the socket engine to wait on the active
 718          * file descriptors. The socket engine has everything's
 719          * descriptors in its list... dns, modules, users,
 720          * servers... so its nice and easy, just one call.
 721          */
 722         if (!(numberactive = SE->Wait(activefds)))
 723                 return;
 724
 725         /**
 726          * Now process each of the fd's. For users, we have a fast
 727          * lookup table which can find a user by file descriptor, so
 728          * processing them by fd isnt expensive. If we have a lot of
 729          * listening ports or module sockets though, things could get
 730          * ugly.
 731          */
 732         this->Log(DEBUG,"There are %d fd's to process.",numberactive);
 733
 734         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 735         {
 736                 int socket_type = SE->GetType(activefds[activefd]);
 737                 switch (socket_type)
 738                 {
 739                         case X_ESTAB_CLIENT:
 740
 741                                 this->Log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 742                                 cu = this->fd_ref_table[activefds[activefd]];
 743                                 if (cu)
 744                                         this->ProcessUser(cu);
 745
 746                         break;
 747
 748                         case X_ESTAB_MODULE:
 749
 750                                 this->Log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 751
 752                                 if (!process_module_sockets)
 753                                         break;
 754
 755                                 /* Process module-owned sockets.
 756                                  * Modules are encouraged to inherit their sockets from
 757                                  * InspSocket so we can process them neatly like this.
 758                                  */
 759                                 s = this->socket_ref[activefds[activefd]];
 760
 761                                 if ((s) && (!s->Poll()))
 762                                 {
 763                                         this->Log(DEBUG,"Socket poll returned false, close and bail");
 764                                         SE->DelFd(s->GetFd());
 765                                         this->socket_ref[activefds[activefd]] = NULL;
 766                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 767                                         {
 768                                                 s_del = *a;
 769                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 770                                                 {
 771                                                         module_sockets.erase(a);
 772                                                         break;
 773                                                 }
 774                                         }
 775                                         s->Close();
 776                                         DELETE(s);
 777                                 }
 778                                 else if (!s)
 779                                 {
 780                                         this->Log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 781                                         SE->DelFd(s->GetFd());
 782                                 }
 783                         break;
 784
 785                         case X_ESTAB_DNS:
 786                                 /* Handles instances of the Resolver class,
 787                                  * a simple class extended by modules and the core for
 788                                  * nonblocking resolving of addresses.
 789                                  */
 790                                 this->Res->MarshallReads(activefds[activefd]);
 791                         break;
 792
 793                         case X_LISTEN:
 794
 795                                 this->Log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 796
 797                                 /* It's a listener */
 798                                 uslen = sizeof(sock_us);
 799                                 length = sizeof(client);
 800                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 801
 802                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 803                                 {
 804 #ifdef IPV6
 805                                         in_port = ntohs(sock_us.sin6_port);
 806 #else
 807                                         in_port = ntohs(sock_us.sin_port);
 808 #endif
 809                                         this->Log(DEBUG,"Accepted socket %d",incomingSockfd);
 810                                         /* Years and years ago, we used to resolve here
 811                                          * using gethostbyaddr(). That is sucky and we
 812                                          * don't do that any more...
 813                                          */
 814                                         NonBlocking(incomingSockfd);
 815                                         if (Config->GetIOHook(in_port))
 816                                         {
 817                                                 try
 818                                                 {
 819 #ifdef IPV6
 820                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 821 #else
 822                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 823 #endif
 824                                                 }
 825                                                 catch (ModuleException& modexcept)
 826                                                 {
 827                                                         this->Log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 828                                                 }
 829                                         }
 830                                         stats->statsAccept++;
 831 #ifdef IPV6
 832                                         this->Log(DEBUG,"Add ipv6 client");
 833                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin6_addr);
 834 #else
 835                                         this->Log(DEBUG,"Add ipv4 client");
 836                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin_addr);
 837 #endif
 838                                         this->Log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 839                                 }
 840                                 else
 841                                 {
 842                                         this->Log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 843                                         shutdown(incomingSockfd,2);
 844                                         close(incomingSockfd);
 845                                         stats->statsRefused++;
 846                                 }
 847                         break;
 848
 849                         default:
 850                                 /* Something went wrong if we're in here.
 851                                  * In fact, so wrong, im not quite sure
 852                                  * what we would do, so for now, its going
 853                                  * to safely do bugger all.
 854                                  */
 855                                 this->Log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 856                                 SE->DelFd(activefds[activefd]);
 857                         break;
 858                 }
 859         }
 860 }
 861
 862 bool InspIRCd::IsIdent(const char* n)
 863 {
 864         if (!n || !*n)
 865                 return false;
 866
 867         for (char* i = (char*)n; *i; i++)
 868         {
 869                 if ((*i >= 'A') && (*i <= '}'))
 870                 {
 871                         continue;
 872                 }
 873                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 874                 {
 875                         continue;
 876                 }
 877                 return false;
 878         }
 879         return true;
 880 }
 881
 882
 883 bool InspIRCd::IsNick(const char* n)
 884 {
 885         if (!n || !*n)
 886                 return false;
 887
 888         int p = 0;
 889         for (char* i = (char*)n; *i; i++, p++)
 890         {
 891                 /* "A"-"}" can occur anywhere in a nickname */
 892                 if ((*i >= 'A') && (*i <= '}'))
 893                 {
 894                         continue;
 895                 }
 896                 /* "0"-"9", "-" can occur anywhere BUT the first char of a nickname */
 897                 if ((((*i >= '0') && (*i <= '9')) || (*i == '-')) && (i > n))
 898                 {
 899                         continue;
 900                 }
 901                 /* invalid character! abort */
 902                 return false;
 903         }
 904         return (p < NICKMAX - 1);
 905 }
 906
 907 int InspIRCd::Run()
 908 {
 909         this->Res = new DNS(this);
 910
 911         this->Log(DEBUG,"RES: %08x",this->Res);
 912
 913         this->LoadAllModules();
 914
 915         /* Just in case no modules were loaded - fix for bug #101 */
 916         this->BuildISupport();
 917
 918         if (!stats->BoundPortCount)
 919         {
 920                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 921                 Exit(ERROR);
 922         }
 923
 924         /* Add the listening sockets used for client inbound connections
 925          * to the socket engine
 926          */
 927         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 928         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 929         {
 930                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 931                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 932                 {
 933                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 934                         Exit(ERROR);
 935                 }
 936         }
 937
 938         if (!Config->nofork)
 939         {
 940                 fclose(stdout);
 941                 fclose(stderr);
 942                 fclose(stdin);
 943         }
 944
 945         printf("\nInspIRCd is now running!\n");
 946
 947         this->WritePID(Config->PID);
 948
 949         /* main loop, this never returns */
 950         expire_run = false;
 951         iterations = 0;
 952
 953         while (true)
 954         {
 955                 DoOneIteration(true);
 956         }
 957         /* This is never reached -- we hope! */
 958         return 0;
 959 }
 960
 961 /**********************************************************************************/
 962
 963 /**
 964  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 965  */
 966
 967 int main(int argc, char** argv)
 968 {
 969         ServerInstance = new InspIRCd(argc, argv);
 970         ServerInstance->Run();
 971         delete ServerInstance;
 972         return 0;
 973 }
 974
 975 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 976  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 977  * registration timeout maximum seconds)
 978  */
 979 bool InspIRCd::AllModulesReportReady(userrec* user)
 980 {
 981         if (!Config->global_implementation[I_OnCheckReady])
 982                 return true;
 983
 984         for (int i = 0; i <= this->GetModuleCount(); i++)
 985         {
 986                 if (Config->implement_lists[i][I_OnCheckReady])
 987                 {
 988                         int res = modules[i]->OnCheckReady(user);
 989                         if (!res)
 990                                 return false;
 991                 }
 992         }
 993         return true;
 994 }
 995
 996 int InspIRCd::GetModuleCount()
 997 {
 998         return this->ModCount;
 999 }
1000
1001 time_t InspIRCd::Time()
1002 {
1003         return TIME;
1004 }
1005