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
  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)
 194         : 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)
 195 {
 196         bool SEGVHandler = false;
 197         ServerInstance = this;
 198
 199         modules.resize(255);
 200         factory.resize(255);
 201
 202         this->Config = new ServerConfig(this);
 203         this->Start();
 204         this->module_sockets.clear();
 205         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 206         srand(this->TIME);
 207         this->Log(DEBUG,"*** InspIRCd starting up!");
 208         if (!ServerConfig::FileExists(CONFIG_FILE))
 209         {
 210                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 211                 this->Log(DEFAULT,"main: no config");
 212                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 213                 Exit(ERROR);
 214         }
 215         *this->LogFileName = 0;
 216         if (argc > 1) {
 217                 for (int i = 1; i < argc; i++)
 218                 {
 219                         if (!strcmp(argv[i],"-nofork"))
 220                         {
 221                                 Config->nofork = true;
 222                         }
 223                         else if(!strcmp(argv[i],"-debug"))
 224                         {
 225                                 Config->forcedebug = true;
 226                         }
 227                         else if(!strcmp(argv[i],"-nolog"))
 228                         {
 229                                 Config->writelog = false;
 230                         }
 231                         else if (!strcmp(argv[i],"-wait"))
 232                         {
 233                                 sleep(6);
 234                         }
 235                         else if (!strcmp(argv[i],"-nolimit"))
 236                         {
 237                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 238                         }
 239                         else if (!strcmp(argv[i],"-notraceback"))
 240                         {
 241                                 SEGVHandler = false;
 242                         }
 243                         else if (!strcmp(argv[i],"-logfile"))
 244                         {
 245                                 if (argc > i+1)
 246                                 {
 247                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 248                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 249                                 }
 250                                 else
 251                                 {
 252                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 253                                         Exit(ERROR);
 254                                 }
 255                                 i++;
 256                         }
 257                         else
 258                         {
 259                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 260                                 Exit(ERROR);
 261                         }
 262                 }
 263         }
 264
 265         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 266
 267         this->MakeLowerMap();
 268
 269         OpenLog(argv, argc);
 270         this->stats = new serverstats();
 271         this->Parser = new CommandParser(this);
 272         this->Timers = new TimerManager();
 273         this->XLines = new XLineManager(this);
 274         Config->ClearStack();
 275         Config->Read(true, NULL);
 276         this->CheckRoot();
 277         this->Modes = new ModeParser(this);
 278         this->AddServerName(Config->ServerName);
 279         CheckDie();
 280         InitializeDisabledCommands(Config->DisabledCommands, this);
 281         stats->BoundPortCount = BindPorts(true);
 282
 283         for(int t = 0; t < 255; t++)
 284                 Config->global_implementation[t] = 0;
 285
 286         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 287
 288         printf("\n");
 289         this->SetSignals(SEGVHandler);
 290         if (!Config->nofork)
 291         {
 292                 if (!this->DaemonSeed())
 293                 {
 294                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 295                         Exit(ERROR);
 296                 }
 297         }
 298
 299         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 300          * initialize the socket engine.
 301          */
 302         SocketEngineFactory* SEF = new SocketEngineFactory();
 303         SE = SEF->Create(this);
 304         delete SEF;
 305
 306         /* We must load the modules AFTER initializing the socket engine, now */
 307
 308         return;
 309 }
 310
 311 std::string InspIRCd::GetVersionString()
 312 {
 313         char versiondata[MAXBUF];
 314         char dnsengine[] = "singlethread-object";
 315         if (*Config->CustomVersion)
 316         {
 317                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 318         }
 319         else
 320         {
 321                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 322         }
 323         return versiondata;
 324 }
 325
 326 char* InspIRCd::ModuleError()
 327 {
 328         return MODERR;
 329 }
 330
 331 void InspIRCd::EraseFactory(int j)
 332 {
 333         int v = 0;
 334         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 335         {
 336                 if (v == j)
 337                 {
 338                         factory.erase(t);
 339                         factory.push_back(NULL);
 340                         return;
 341                 }
 342                 v++;
 343         }
 344 }
 345
 346 void InspIRCd::EraseModule(int j)
 347 {
 348         int v1 = 0;
 349         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 350         {
 351                 if (v1 == j)
 352                 {
 353                         DELETE(*m);
 354                         modules.erase(m);
 355                         modules.push_back(NULL);
 356                         break;
 357                 }
 358                 v1++;
 359         }
 360         int v2 = 0;
 361         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 362         {
 363                 if (v2 == j)
 364                 {
 365                        Config->module_names.erase(v);
 366                        break;
 367                 }
 368                 v2++;
 369         }
 370
 371 }
 372
 373 void InspIRCd::MoveTo(std::string modulename,int slot)
 374 {
 375         unsigned int v2 = 256;
 376         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 377         {
 378                 if (Config->module_names[v] == modulename)
 379                 {
 380                         // found an instance, swap it with the item at the end
 381                         v2 = v;
 382                         break;
 383                 }
 384         }
 385         if ((v2 != (unsigned int)slot) && (v2 < 256))
 386         {
 387                 // Swap the module names over
 388                 Config->module_names[v2] = Config->module_names[slot];
 389                 Config->module_names[slot] = modulename;
 390                 // now swap the module factories
 391                 ircd_module* temp = factory[v2];
 392                 factory[v2] = factory[slot];
 393                 factory[slot] = temp;
 394                 // now swap the module objects
 395                 Module* temp_module = modules[v2];
 396                 modules[v2] = modules[slot];
 397                 modules[slot] = temp_module;
 398                 // now swap the implement lists (we dont
 399                 // need to swap the global or recount it)
 400                 for (int n = 0; n < 255; n++)
 401                 {
 402                         char x = Config->implement_lists[v2][n];
 403                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 404                         Config->implement_lists[slot][n] = x;
 405                 }
 406         }
 407         else
 408         {
 409                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 410         }
 411 }
 412
 413 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 414 {
 415         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 416         {
 417                 if (Config->module_names[v] == after)
 418                 {
 419                         MoveTo(modulename, v);
 420                         return;
 421                 }
 422         }
 423 }
 424
 425 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 426 {
 427         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 428         {
 429                 if (Config->module_names[v] == before)
 430                 {
 431                         if (v > 0)
 432                         {
 433                                 MoveTo(modulename, v-1);
 434                         }
 435                         else
 436                         {
 437                                 MoveTo(modulename, v);
 438                         }
 439                         return;
 440                 }
 441         }
 442 }
 443
 444 void InspIRCd::MoveToFirst(std::string modulename)
 445 {
 446         MoveTo(modulename,0);
 447 }
 448
 449 void InspIRCd::MoveToLast(std::string modulename)
 450 {
 451         MoveTo(modulename,this->GetModuleCount());
 452 }
 453
 454 void InspIRCd::BuildISupport()
 455 {
 456         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 457         std::stringstream v;
 458         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 459         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 460         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 461         Config->data005 = v.str();
 462         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 463 }
 464
 465 bool InspIRCd::UnloadModule(const char* filename)
 466 {
 467         std::string filename_str = filename;
 468         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 469         {
 470                 if (Config->module_names[j] == filename_str)
 471                 {
 472                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 473                         {
 474                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 475                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 476                                 return false;
 477                         }
 478                         /* Give the module a chance to tidy out all its metadata */
 479                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 480                         {
 481                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 482                         }
 483                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 484                         {
 485                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 486                         }
 487
 488                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 489
 490                         for(int t = 0; t < 255; t++)
 491                         {
 492                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 493                         }
 494
 495                         /* We have to renumber implement_lists after unload because the module numbers change!
 496                          */
 497                         for(int j2 = j; j2 < 254; j2++)
 498                         {
 499                                 for(int t = 0; t < 255; t++)
 500                                 {
 501                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 502                                 }
 503                         }
 504
 505                         // found the module
 506                         this->Log(DEBUG,"Removing dependent commands...");
 507                         Parser->RemoveCommands(filename);
 508                         this->Log(DEBUG,"Deleting module...");
 509                         this->EraseModule(j);
 510                         this->Log(DEBUG,"Erasing module entry...");
 511                         this->EraseFactory(j);
 512                         this->Log(DEFAULT,"Module %s unloaded",filename);
 513                         this->ModCount--;
 514                         BuildISupport();
 515                         return true;
 516                 }
 517         }
 518         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 519         snprintf(MODERR,MAXBUF,"Module not loaded");
 520         return false;
 521 }
 522
 523 bool InspIRCd::LoadModule(const char* filename)
 524 {
 525         char modfile[MAXBUF];
 526 #ifdef STATIC_LINK
 527         strlcpy(modfile,filename,MAXBUF);
 528 #else
 529         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 530 #endif
 531         std::string filename_str = filename;
 532 #ifndef STATIC_LINK
 533 #ifndef IS_CYGWIN
 534         if (!ServerConfig::DirValid(modfile))
 535         {
 536                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 537                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 538                 return false;
 539         }
 540 #endif
 541 #endif
 542         this->Log(DEBUG,"Loading module: %s",modfile);
 543 #ifndef STATIC_LINK
 544         if (ServerConfig::FileExists(modfile))
 545         {
 546 #endif
 547                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 548                 {
 549                         if (Config->module_names[j] == filename_str)
 550                         {
 551                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 552                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 553                                 return false;
 554                         }
 555                 }
 556                 try
 557                 {
 558                         ircd_module* a = new ircd_module(this, modfile);
 559                         factory[this->ModCount+1] = a;
 560                         if (factory[this->ModCount+1]->LastError())
 561                         {
 562                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 563                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 564                                 return false;
 565                         }
 566                         if ((long)factory[this->ModCount+1]->factory != -1)
 567                         {
 568                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 569                                 modules[this->ModCount+1] = m;
 570                                 /* save the module and the module's classfactory, if
 571                                  * this isnt done, random crashes can occur :/ */
 572                                 Config->module_names.push_back(filename);
 573
 574                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 575                                 for(int t = 0; t < 255; t++)
 576                                         x[t] = 0;
 577
 578                                 modules[this->ModCount+1]->Implements(x);
 579
 580                                 for(int t = 0; t < 255; t++)
 581                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 582                         }
 583                         else
 584                         {
 585                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 586                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 587                                 return false;
 588                         }
 589                 }
 590                 catch (ModuleException& modexcept)
 591                 {
 592                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 593                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 594                         return false;
 595                 }
 596 #ifndef STATIC_LINK
 597         }
 598         else
 599         {
 600                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 601                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 602                 return false;
 603         }
 604 #endif
 605         this->ModCount++;
 606         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 607         // now work out which modules, if any, want to move to the back of the queue,
 608         // and if they do, move them there.
 609         std::vector<std::string> put_to_back;
 610         std::vector<std::string> put_to_front;
 611         std::map<std::string,std::string> put_before;
 612         std::map<std::string,std::string> put_after;
 613         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 614         {
 615                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 616                 {
 617                         put_to_back.push_back(Config->module_names[j]);
 618                 }
 619                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 620                 {
 621                         put_to_front.push_back(Config->module_names[j]);
 622                 }
 623                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 624                 {
 625                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 626                 }
 627                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 628                 {
 629                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 630                 }
 631         }
 632         for (unsigned int j = 0; j < put_to_back.size(); j++)
 633         {
 634                 MoveToLast(put_to_back[j]);
 635         }
 636         for (unsigned int j = 0; j < put_to_front.size(); j++)
 637         {
 638                 MoveToFirst(put_to_front[j]);
 639         }
 640         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 641         {
 642                 MoveBefore(j->first,j->second);
 643         }
 644         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 645         {
 646                 MoveAfter(j->first,j->second);
 647         }
 648         BuildISupport();
 649         return true;
 650 }
 651
 652 void InspIRCd::DoOneIteration(bool process_module_sockets)
 653 {
 654         int activefds[MAX_DESCRIPTORS];
 655         int incomingSockfd;
 656         int in_port;
 657         userrec* cu = NULL;
 658         InspSocket* s = NULL;
 659         InspSocket* s_del = NULL;
 660         unsigned int numberactive;
 661         insp_sockaddr sock_us;     // our port number
 662         socklen_t uslen;         // length of our port number
 663
 664         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 665          * Once per loop iteration is pleanty.
 666          */
 667         OLDTIME = TIME;
 668         TIME = time(NULL);
 669
 670         /* Run background module timers every few seconds
 671          * (the docs say modules shouldnt rely on accurate
 672          * timing using this event, so we dont have to
 673          * time this exactly).
 674          */
 675         if (((TIME % 5) == 0) && (!expire_run))
 676         {
 677                 XLines->expire_lines();
 678                 if (process_module_sockets)
 679                 {
 680                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 681                 }
 682                 Timers->TickMissedTimers(TIME);
 683                 expire_run = true;
 684                 return;
 685         }
 686         else if ((TIME % 5) == 1)
 687         {
 688                 expire_run = false;
 689         }
 690
 691         if (iterations++ == 15)
 692         {
 693                 iterations = 0;
 694                 this->DoBackgroundUserStuff(TIME);
 695         }
 696
 697         /* Once a second, do the background processing */
 698         if (TIME != OLDTIME)
 699         {
 700                 if (TIME < OLDTIME)
 701                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 702                 if ((TIME % 3600) == 0)
 703                 {
 704                         irc::whowas::MaintainWhoWas(TIME);
 705                 }
 706         }
 707
 708         /* Process timeouts on module sockets each time around
 709          * the loop. There shouldnt be many module sockets, at
 710          * most, 20 or so, so this won't be much of a performance
 711          * hit at all.
 712          */
 713         if (process_module_sockets)
 714                 this->DoSocketTimeouts(TIME);
 715
 716         Timers->TickTimers(TIME);
 717
 718         /* Call the socket engine to wait on the active
 719          * file descriptors. The socket engine has everything's
 720          * descriptors in its list... dns, modules, users,
 721          * servers... so its nice and easy, just one call.
 722          */
 723         if (!(numberactive = SE->Wait(activefds)))
 724                 return;
 725
 726         /**
 727          * Now process each of the fd's. For users, we have a fast
 728          * lookup table which can find a user by file descriptor, so
 729          * processing them by fd isnt expensive. If we have a lot of
 730          * listening ports or module sockets though, things could get
 731          * ugly.
 732          */
 733         this->Log(DEBUG,"There are %d fd's to process.",numberactive);
 734
 735         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 736         {
 737                 int socket_type = SE->GetType(activefds[activefd]);
 738                 switch (socket_type)
 739                 {
 740                         case X_ESTAB_CLIENT:
 741
 742                                 this->Log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 743                                 cu = this->fd_ref_table[activefds[activefd]];
 744                                 if (cu)
 745                                         this->ProcessUser(cu);
 746
 747                         break;
 748
 749                         case X_ESTAB_MODULE:
 750
 751                                 this->Log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 752
 753                                 if (!process_module_sockets)
 754                                         break;
 755
 756                                 /* Process module-owned sockets.
 757                                  * Modules are encouraged to inherit their sockets from
 758                                  * InspSocket so we can process them neatly like this.
 759                                  */
 760                                 s = this->socket_ref[activefds[activefd]];
 761
 762                                 if ((s) && (!s->Poll()))
 763                                 {
 764                                         this->Log(DEBUG,"Socket poll returned false, close and bail");
 765                                         SE->DelFd(s->GetFd());
 766                                         this->socket_ref[activefds[activefd]] = NULL;
 767                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 768                                         {
 769                                                 s_del = *a;
 770                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 771                                                 {
 772                                                         module_sockets.erase(a);
 773                                                         break;
 774                                                 }
 775                                         }
 776                                         s->Close();
 777                                         DELETE(s);
 778                                 }
 779                                 else if (!s)
 780                                 {
 781                                         this->Log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 782                                         SE->DelFd(s->GetFd());
 783                                 }
 784                         break;
 785
 786                         case X_ESTAB_DNS:
 787                                 /* Handles instances of the Resolver class,
 788                                  * a simple class extended by modules and the core for
 789                                  * nonblocking resolving of addresses.
 790                                  */
 791                                 this->Res->MarshallReads(activefds[activefd]);
 792                         break;
 793
 794                         case X_LISTEN:
 795
 796                                 this->Log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 797
 798                                 /* It's a listener */
 799                                 uslen = sizeof(sock_us);
 800                                 length = sizeof(client);
 801                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 802
 803                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 804                                 {
 805 #ifdef IPV6
 806                                         in_port = ntohs(sock_us.sin6_port);
 807 #else
 808                                         in_port = ntohs(sock_us.sin_port);
 809 #endif
 810                                         this->Log(DEBUG,"Accepted socket %d",incomingSockfd);
 811                                         /* Years and years ago, we used to resolve here
 812                                          * using gethostbyaddr(). That is sucky and we
 813                                          * don't do that any more...
 814                                          */
 815                                         NonBlocking(incomingSockfd);
 816                                         if (Config->GetIOHook(in_port))
 817                                         {
 818                                                 try
 819                                                 {
 820 #ifdef IPV6
 821                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 822 #else
 823                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 824 #endif
 825                                                 }
 826                                                 catch (ModuleException& modexcept)
 827                                                 {
 828                                                         this->Log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 829                                                 }
 830                                         }
 831                                         stats->statsAccept++;
 832 #ifdef IPV6
 833                                         this->Log(DEBUG,"Add ipv6 client");
 834                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin6_addr);
 835 #else
 836                                         this->Log(DEBUG,"Add ipv4 client");
 837                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin_addr);
 838 #endif
 839                                         this->Log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 840                                 }
 841                                 else
 842                                 {
 843                                         this->Log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 844                                         shutdown(incomingSockfd,2);
 845                                         close(incomingSockfd);
 846                                         stats->statsRefused++;
 847                                 }
 848                         break;
 849
 850                         default:
 851                                 /* Something went wrong if we're in here.
 852                                  * In fact, so wrong, im not quite sure
 853                                  * what we would do, so for now, its going
 854                                  * to safely do bugger all.
 855                                  */
 856                                 this->Log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 857                                 SE->DelFd(activefds[activefd]);
 858                         break;
 859                 }
 860         }
 861 }
 862
 863 bool InspIRCd::IsIdent(const char* n)
 864 {
 865         if (!n || !*n)
 866                 return false;
 867
 868         for (char* i = (char*)n; *i; i++)
 869         {
 870                 if ((*i >= 'A') && (*i <= '}'))
 871                 {
 872                         continue;
 873                 }
 874                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 875                 {
 876                         continue;
 877                 }
 878                 return false;
 879         }
 880         return true;
 881 }
 882
 883
 884 bool InspIRCd::IsNick(const char* n)
 885 {
 886         if (!n || !*n)
 887                 return false;
 888
 889         int p = 0;
 890         for (char* i = (char*)n; *i; i++, p++)
 891         {
 892                 /* "A"-"}" can occur anywhere in a nickname */
 893                 if ((*i >= 'A') && (*i <= '}'))
 894                 {
 895                         continue;
 896                 }
 897                 /* "0"-"9", "-" can occur anywhere BUT the first char of a nickname */
 898                 if ((((*i >= '0') && (*i <= '9')) || (*i == '-')) && (i > n))
 899                 {
 900                         continue;
 901                 }
 902                 /* invalid character! abort */
 903                 return false;
 904         }
 905         return (p < NICKMAX - 1);
 906 }
 907
 908 int InspIRCd::Run()
 909 {
 910         this->Res = new DNS(this);
 911
 912         this->Log(DEBUG,"RES: %08x",this->Res);
 913
 914         this->LoadAllModules();
 915
 916         /* Just in case no modules were loaded - fix for bug #101 */
 917         this->BuildISupport();
 918
 919         if (!stats->BoundPortCount)
 920         {
 921                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 922                 Exit(ERROR);
 923         }
 924
 925         /* Add the listening sockets used for client inbound connections
 926          * to the socket engine
 927          */
 928         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 929         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 930         {
 931                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 932                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 933                 {
 934                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 935                         Exit(ERROR);
 936                 }
 937         }
 938
 939         if (!Config->nofork)
 940         {
 941                 fclose(stdout);
 942                 fclose(stderr);
 943                 fclose(stdin);
 944         }
 945
 946         printf("\nInspIRCd is now running!\n");
 947
 948         this->WritePID(Config->PID);
 949
 950         /* main loop, this never returns */
 951         expire_run = false;
 952         iterations = 0;
 953
 954         while (true)
 955         {
 956                 DoOneIteration(true);
 957         }
 958         /* This is never reached -- we hope! */
 959         return 0;
 960 }
 961
 962 /**********************************************************************************/
 963
 964 /**
 965  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 966  */
 967
 968 int main(int argc, char** argv)
 969 {
 970         ServerInstance = new InspIRCd(argc, argv);
 971         ServerInstance->Run();
 972         delete ServerInstance;
 973         return 0;
 974 }
 975
 976 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 977  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 978  * registration timeout maximum seconds)
 979  */
 980 bool InspIRCd::AllModulesReportReady(userrec* user)
 981 {
 982         if (!Config->global_implementation[I_OnCheckReady])
 983                 return true;
 984
 985         for (int i = 0; i <= this->GetModuleCount(); i++)
 986         {
 987                 if (Config->implement_lists[i][I_OnCheckReady])
 988                 {
 989                         int res = modules[i]->OnCheckReady(user);
 990                         if (!res)
 991                                 return false;
 992                 }
 993         }
 994         return true;
 995 }
 996
 997 int InspIRCd::GetModuleCount()
 998 {
 999         return this->ModCount;
1000 }
1001
1002 time_t InspIRCd::Time()
1003 {
1004         return TIME;
1005 }
1006