src/inspircd.cpp

   1 /* ---------------------------------------------------------------------
   2  *
   3  *              +------------------------------------+
   4  *              | Inspire Internet Relay Chat Daemon |
   5  *              +------------------------------------+
   6  *
   7  *         InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   8  *                             E-mail:
   9  *                      <brain@chatspike.net>
  10  *                      <Craig@chatspike.net>
  11  *
  12  *  Written by Craig Edwards, Craig McLure, and others.
  13  *  This program is free but copyrighted software; you can redistribute
  14  *  it and/or modify it under the terms of the GNU General Public
  15  *  License as published by the Free Software Foundation, version 2
  16  *  (two) ONLY.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  *
  27  * ---------------------------------------------------------------------
  28  */
  29
  30 #include <algorithm>
  31 #include "inspircd_config.h"
  32 #include "inspircd.h"
  33 #include "configreader.h"
  34 #include <fcntl.h>
  35 #include <sys/errno.h>
  36 #include <sys/ioctl.h>
  37 #include <signal.h>
  38 #include <time.h>
  39 #include <string>
  40 #include <exception>
  41 #include <stdexcept>
  42 #include <new>
  43 #include <map>
  44 #include <sstream>
  45 #include <fstream>
  46 #include <vector>
  47 #include <deque>
  48 #include "users.h"
  49 #include "ctables.h"
  50 #include "globals.h"
  51 #include "modules.h"
  52 #include "dynamic.h"
  53 #include "wildcard.h"
  54 #include "message.h"
  55 #include "mode.h"
  56 #include "commands.h"
  57 #include "xline.h"
  58 #include "inspstring.h"
  59 #include "helperfuncs.h"
  60 #include "hashcomp.h"
  61 #include "socketengine.h"
  62 #include "inspircd_se_config.h"
  63 #include "userprocess.h"
  64 #include "socket.h"
  65 #include "typedefs.h"
  66 #include "command_parse.h"
  67
  68 using irc::sockets::BindPorts;
  69 using irc::sockets::NonBlocking;
  70 using irc::sockets::insp_ntoa;
  71 using irc::sockets::insp_inaddr;
  72 using irc::sockets::insp_sockaddr;
  73
  74 InspIRCd* ServerInstance = NULL;
  75
  76 extern ModuleList modules;
  77 extern FactoryList factory;
  78
  79 extern int MODCOUNT;
  80 extern char LOG_FILE[MAXBUF];
  81
  82 int iterations = 0;
  83
  84 insp_sockaddr client, server;
  85 socklen_t length;
  86
  87 time_t TIME = time(NULL), OLDTIME = time(NULL);
  88
  89 Server* MyServer = new Server;
  90 char lowermap[255];
  91
  92 void InspIRCd::AddServerName(const std::string &servername)
  93 {
  94         log(DEBUG,"Adding server name: %s",servername.c_str());
  95
  96         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  97                 servernames.push_back(servername); /* Wasn't already there. */
  98 }
  99
 100 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
 101 {
 102         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
 103
 104         if(iter == servernames.end())
 105         {
 106                 AddServerName(servername);
 107                 iter = --servernames.end();
 108         }
 109
 110         return iter->c_str();
 111 }
 112
 113 bool InspIRCd::FindServerName(const std::string &servername)
 114 {
 115         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 116 }
 117
 118 void Exit(int status)
 119 {
 120         if (ServerInstance->Config->log_file)
 121                 fclose(ServerInstance->Config->log_file);
 122         ServerInstance->SendError("Server shutdown.");
 123         exit (status);
 124 }
 125
 126 void InspIRCd::Start()
 127 {
 128         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 129         printf("(C) ChatSpike Development team.\033[0m\n\n");
 130         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 131         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 132         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 133 }
 134
 135 void Killed(int status)
 136 {
 137         if (ServerInstance->Config->log_file)
 138                 fclose(ServerInstance->Config->log_file);
 139         ServerInstance->SendError("Server terminated.");
 140         exit(status);
 141 }
 142
 143 void Rehash(int status)
 144 {
 145         ServerInstance->WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 146         fclose(ServerInstance->Config->log_file);
 147         OpenLog(NULL,0);
 148         ServerInstance->Config->Read(false,NULL);
 149         FOREACH_MOD(I_OnRehash,OnRehash(""));
 150 }
 151
 152 void InspIRCd::SetSignals(bool SEGVHandler)
 153 {
 154         signal (SIGALRM, SIG_IGN);
 155         signal (SIGHUP, Rehash);
 156         signal (SIGPIPE, SIG_IGN);
 157         signal (SIGTERM, Exit);
 158         if (SEGVHandler)
 159                 signal (SIGSEGV, Error);
 160 }
 161
 162 bool InspIRCd::DaemonSeed()
 163 {
 164         int childpid;
 165         if ((childpid = fork ()) < 0)
 166                 return (ERROR);
 167         else if (childpid > 0)
 168         {
 169                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 170                 sleep(6);
 171                 exit (0);
 172         }
 173         setsid ();
 174         umask (007);
 175         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 176
 177         rlimit rl;
 178         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 179         {
 180                 log(DEFAULT,"Failed to getrlimit()!");
 181                 return false;
 182         }
 183         else
 184         {
 185                 rl.rlim_cur = rl.rlim_max;
 186                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 187                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 188         }
 189
 190         return true;
 191 }
 192
 193 void InspIRCd::WritePID(const std::string &filename)
 194 {
 195         std::ofstream outfile(filename.c_str());
 196         if (outfile.is_open())
 197         {
 198                 outfile << getpid();
 199                 outfile.close();
 200         }
 201         else
 202         {
 203                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 204                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 205                 Exit(0);
 206         }
 207 }
 208
 209 std::string InspIRCd::GetRevision()
 210 {
 211         return REVISION;
 212 }
 213
 214 void InspIRCd::MakeLowerMap()
 215 {
 216         // initialize the lowercase mapping table
 217         for (unsigned int cn = 0; cn < 256; cn++)
 218                 lowermap[cn] = cn;
 219         // lowercase the uppercase chars
 220         for (unsigned int cn = 65; cn < 91; cn++)
 221                 lowermap[cn] = tolower(cn);
 222         // now replace the specific chars for scandanavian comparison
 223         lowermap[(unsigned)'['] = '{';
 224         lowermap[(unsigned)']'] = '}';
 225         lowermap[(unsigned)'\\'] = '|';
 226 }
 227
 228 InspIRCd::InspIRCd(int argc, char** argv)
 229 {
 230         bool SEGVHandler = false;
 231         ServerInstance = this;
 232         this->Config = new ServerConfig(this);
 233         this->Start();
 234         this->module_sockets.clear();
 235         this->startup_time = time(NULL);
 236         srand(time(NULL));
 237         log(DEBUG,"*** InspIRCd starting up!");
 238         if (!FileExists(CONFIG_FILE))
 239         {
 240                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 241                 log(DEFAULT,"main: no config");
 242                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 243                 Exit(ERROR);
 244         }
 245         *LOG_FILE = 0;
 246         if (argc > 1) {
 247                 for (int i = 1; i < argc; i++)
 248                 {
 249                         if (!strcmp(argv[i],"-nofork"))
 250                         {
 251                                 Config->nofork = true;
 252                         }
 253                         else if(!strcmp(argv[i],"-debug"))
 254                         {
 255                                 Config->forcedebug = true;
 256                         }
 257                         else if(!strcmp(argv[i],"-nolog"))
 258                         {
 259                                 Config->writelog = false;
 260                         }
 261                         else if (!strcmp(argv[i],"-wait"))
 262                         {
 263                                 sleep(6);
 264                         }
 265                         else if (!strcmp(argv[i],"-nolimit"))
 266                         {
 267                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 268                         }
 269                         else if (!strcmp(argv[i],"-notraceback"))
 270                         {
 271                                 SEGVHandler = false;
 272                         }
 273                         else if (!strcmp(argv[i],"-logfile"))
 274                         {
 275                                 if (argc > i+1)
 276                                 {
 277                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 278                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 279                                 }
 280                                 else
 281                                 {
 282                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 283                                         Exit(ERROR);
 284                                 }
 285                                 i++;
 286                         }
 287                         else
 288                         {
 289                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 290                                 Exit(ERROR);
 291                         }
 292                 }
 293         }
 294
 295         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 296
 297         this->MakeLowerMap();
 298
 299         OpenLog(argv, argc);
 300         this->stats = new serverstats();
 301         this->Parser = new CommandParser();
 302         this->Timers = new TimerManager();
 303         Config->ClearStack();
 304         Config->Read(true, NULL);
 305         CheckRoot();
 306         this->ModeGrok = new ModeParser();
 307         this->AddServerName(Config->ServerName);
 308         CheckDie();
 309         InitializeDisabledCommands(Config->DisabledCommands, this);
 310         stats->BoundPortCount = BindPorts(true);
 311
 312         for(int t = 0; t < 255; t++)
 313                 Config->global_implementation[t] = 0;
 314
 315         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 316
 317         printf("\n");
 318         this->SetSignals(SEGVHandler);
 319         if (!Config->nofork)
 320         {
 321                 if (!this->DaemonSeed())
 322                 {
 323                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 324                         Exit(ERROR);
 325                 }
 326         }
 327
 328         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 329          * initialize the socket engine.
 330          */
 331         SocketEngineFactory* SEF = new SocketEngineFactory();
 332         SE = SEF->Create();
 333         delete SEF;
 334
 335         /* We must load the modules AFTER initializing the socket engine, now */
 336
 337         return;
 338 }
 339
 340 std::string InspIRCd::GetVersionString()
 341 {
 342         char versiondata[MAXBUF];
 343         char dnsengine[] = "singlethread-object";
 344         if (*Config->CustomVersion)
 345         {
 346                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 347         }
 348         else
 349         {
 350                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 351         }
 352         return versiondata;
 353 }
 354
 355 char* InspIRCd::ModuleError()
 356 {
 357         return MODERR;
 358 }
 359
 360 void InspIRCd::EraseFactory(int j)
 361 {
 362         int v = 0;
 363         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 364         {
 365                 if (v == j)
 366                 {
 367                         factory.erase(t);
 368                         factory.push_back(NULL);
 369                         return;
 370                 }
 371                 v++;
 372         }
 373 }
 374
 375 void InspIRCd::EraseModule(int j)
 376 {
 377         int v1 = 0;
 378         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 379         {
 380                 if (v1 == j)
 381                 {
 382                         DELETE(*m);
 383                         modules.erase(m);
 384                         modules.push_back(NULL);
 385                         break;
 386                 }
 387                 v1++;
 388         }
 389         int v2 = 0;
 390         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 391         {
 392                 if (v2 == j)
 393                 {
 394                        Config->module_names.erase(v);
 395                        break;
 396                 }
 397                 v2++;
 398         }
 399
 400 }
 401
 402 void InspIRCd::MoveTo(std::string modulename,int slot)
 403 {
 404         unsigned int v2 = 256;
 405         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 406         {
 407                 if (Config->module_names[v] == modulename)
 408                 {
 409                         // found an instance, swap it with the item at MODCOUNT
 410                         v2 = v;
 411                         break;
 412                 }
 413         }
 414         if ((v2 != (unsigned int)slot) && (v2 < 256))
 415         {
 416                 // Swap the module names over
 417                 Config->module_names[v2] = Config->module_names[slot];
 418                 Config->module_names[slot] = modulename;
 419                 // now swap the module factories
 420                 ircd_module* temp = factory[v2];
 421                 factory[v2] = factory[slot];
 422                 factory[slot] = temp;
 423                 // now swap the module objects
 424                 Module* temp_module = modules[v2];
 425                 modules[v2] = modules[slot];
 426                 modules[slot] = temp_module;
 427                 // now swap the implement lists (we dont
 428                 // need to swap the global or recount it)
 429                 for (int n = 0; n < 255; n++)
 430                 {
 431                         char x = Config->implement_lists[v2][n];
 432                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 433                         Config->implement_lists[slot][n] = x;
 434                 }
 435         }
 436         else
 437         {
 438                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 439         }
 440 }
 441
 442 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 443 {
 444         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 445         {
 446                 if (Config->module_names[v] == after)
 447                 {
 448                         MoveTo(modulename, v);
 449                         return;
 450                 }
 451         }
 452 }
 453
 454 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 455 {
 456         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 457         {
 458                 if (Config->module_names[v] == before)
 459                 {
 460                         if (v > 0)
 461                         {
 462                                 MoveTo(modulename, v-1);
 463                         }
 464                         else
 465                         {
 466                                 MoveTo(modulename, v);
 467                         }
 468                         return;
 469                 }
 470         }
 471 }
 472
 473 void InspIRCd::MoveToFirst(std::string modulename)
 474 {
 475         MoveTo(modulename,0);
 476 }
 477
 478 void InspIRCd::MoveToLast(std::string modulename)
 479 {
 480         MoveTo(modulename,MODCOUNT);
 481 }
 482
 483 void InspIRCd::BuildISupport()
 484 {
 485         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 486         std::stringstream v;
 487         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 488         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 489         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 490         Config->data005 = v.str();
 491         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 492 }
 493
 494 bool InspIRCd::UnloadModule(const char* filename)
 495 {
 496         std::string filename_str = filename;
 497         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 498         {
 499                 if (Config->module_names[j] == filename_str)
 500                 {
 501                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 502                         {
 503                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 504                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 505                                 return false;
 506                         }
 507                         /* Give the module a chance to tidy out all its metadata */
 508                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 509                         {
 510                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 511                         }
 512                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 513                         {
 514                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 515                         }
 516
 517                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 518
 519                         for(int t = 0; t < 255; t++)
 520                         {
 521                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 522                         }
 523
 524                         /* We have to renumber implement_lists after unload because the module numbers change!
 525                          */
 526                         for(int j2 = j; j2 < 254; j2++)
 527                         {
 528                                 for(int t = 0; t < 255; t++)
 529                                 {
 530                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 531                                 }
 532                         }
 533
 534                         // found the module
 535                         log(DEBUG,"Removing dependent commands...");
 536                         Parser->RemoveCommands(filename);
 537                         log(DEBUG,"Deleting module...");
 538                         this->EraseModule(j);
 539                         log(DEBUG,"Erasing module entry...");
 540                         this->EraseFactory(j);
 541                         log(DEFAULT,"Module %s unloaded",filename);
 542                         MODCOUNT--;
 543                         BuildISupport();
 544                         return true;
 545                 }
 546         }
 547         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 548         snprintf(MODERR,MAXBUF,"Module not loaded");
 549         return false;
 550 }
 551
 552 bool InspIRCd::LoadModule(const char* filename)
 553 {
 554         char modfile[MAXBUF];
 555 #ifdef STATIC_LINK
 556         strlcpy(modfile,filename,MAXBUF);
 557 #else
 558         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 559 #endif
 560         std::string filename_str = filename;
 561 #ifndef STATIC_LINK
 562 #ifndef IS_CYGWIN
 563         if (!DirValid(modfile))
 564         {
 565                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 566                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 567                 return false;
 568         }
 569 #endif
 570 #endif
 571         log(DEBUG,"Loading module: %s",modfile);
 572 #ifndef STATIC_LINK
 573         if (FileExists(modfile))
 574         {
 575 #endif
 576                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 577                 {
 578                         if (Config->module_names[j] == filename_str)
 579                         {
 580                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 581                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 582                                 return false;
 583                         }
 584                 }
 585                 try
 586                 {
 587                         ircd_module* a = new ircd_module(modfile);
 588                         factory[MODCOUNT+1] = a;
 589                         if (factory[MODCOUNT+1]->LastError())
 590                         {
 591                                 log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 592                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 593                                 return false;
 594                         }
 595                         if ((int)factory[MODCOUNT+1]->factory != -1)
 596                         {
 597                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 598                                 modules[MODCOUNT+1] = m;
 599                                 /* save the module and the module's classfactory, if
 600                                  * this isnt done, random crashes can occur :/ */
 601                                 Config->module_names.push_back(filename);
 602
 603                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 604                                 for(int t = 0; t < 255; t++)
 605                                         x[t] = 0;
 606
 607                                 modules[MODCOUNT+1]->Implements(x);
 608
 609                                 for(int t = 0; t < 255; t++)
 610                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 611                         }
 612                         else
 613                         {
 614                                 log(DEFAULT,"Unable to load %s",modfile);
 615                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 616                                 return false;
 617                         }
 618                 }
 619                 catch (ModuleException& modexcept)
 620                 {
 621                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 622                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 623                         return false;
 624                 }
 625 #ifndef STATIC_LINK
 626         }
 627         else
 628         {
 629                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 630                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 631                 return false;
 632         }
 633 #endif
 634         MODCOUNT++;
 635         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 636         // now work out which modules, if any, want to move to the back of the queue,
 637         // and if they do, move them there.
 638         std::vector<std::string> put_to_back;
 639         std::vector<std::string> put_to_front;
 640         std::map<std::string,std::string> put_before;
 641         std::map<std::string,std::string> put_after;
 642         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 643         {
 644                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 645                 {
 646                         put_to_back.push_back(Config->module_names[j]);
 647                 }
 648                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 649                 {
 650                         put_to_front.push_back(Config->module_names[j]);
 651                 }
 652                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 653                 {
 654                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 655                 }
 656                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 657                 {
 658                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 659                 }
 660         }
 661         for (unsigned int j = 0; j < put_to_back.size(); j++)
 662         {
 663                 MoveToLast(put_to_back[j]);
 664         }
 665         for (unsigned int j = 0; j < put_to_front.size(); j++)
 666         {
 667                 MoveToFirst(put_to_front[j]);
 668         }
 669         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 670         {
 671                 MoveBefore(j->first,j->second);
 672         }
 673         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 674         {
 675                 MoveAfter(j->first,j->second);
 676         }
 677         BuildISupport();
 678         return true;
 679 }
 680
 681 void InspIRCd::DoOneIteration(bool process_module_sockets)
 682 {
 683         int activefds[MAX_DESCRIPTORS];
 684         int incomingSockfd;
 685         int in_port;
 686         userrec* cu = NULL;
 687         InspSocket* s = NULL;
 688         InspSocket* s_del = NULL;
 689         unsigned int numberactive;
 690         insp_sockaddr sock_us;     // our port number
 691         socklen_t uslen;         // length of our port number
 692
 693         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 694          * Once per loop iteration is pleanty.
 695          */
 696         OLDTIME = TIME;
 697         TIME = time(NULL);
 698
 699         /* Run background module timers every few seconds
 700          * (the docs say modules shouldnt rely on accurate
 701          * timing using this event, so we dont have to
 702          * time this exactly).
 703          */
 704         if (((TIME % 5) == 0) && (!expire_run))
 705         {
 706                 expire_lines();
 707                 if (process_module_sockets)
 708                 {
 709                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 710                 }
 711                 Timers->TickMissedTimers(TIME);
 712                 expire_run = true;
 713                 return;
 714         }
 715         else if ((TIME % 5) == 1)
 716         {
 717                 expire_run = false;
 718         }
 719
 720         if (iterations++ == 15)
 721         {
 722                 iterations = 0;
 723                 this->DoBackgroundUserStuff(TIME);
 724         }
 725
 726         /* Once a second, do the background processing */
 727         if (TIME != OLDTIME)
 728         {
 729                 if (TIME < OLDTIME)
 730                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 731                 if ((TIME % 3600) == 0)
 732                 {
 733                         irc::whowas::MaintainWhoWas(TIME);
 734                 }
 735         }
 736
 737         /* Process timeouts on module sockets each time around
 738          * the loop. There shouldnt be many module sockets, at
 739          * most, 20 or so, so this won't be much of a performance
 740          * hit at all.
 741          */
 742         if (process_module_sockets)
 743                 this->DoSocketTimeouts(TIME);
 744
 745         Timers->TickTimers(TIME);
 746
 747         /* Call the socket engine to wait on the active
 748          * file descriptors. The socket engine has everything's
 749          * descriptors in its list... dns, modules, users,
 750          * servers... so its nice and easy, just one call.
 751          */
 752         if (!(numberactive = SE->Wait(activefds)))
 753                 return;
 754
 755         /**
 756          * Now process each of the fd's. For users, we have a fast
 757          * lookup table which can find a user by file descriptor, so
 758          * processing them by fd isnt expensive. If we have a lot of
 759          * listening ports or module sockets though, things could get
 760          * ugly.
 761          */
 762         log(DEBUG,"There are %d fd's to process.",numberactive);
 763
 764         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 765         {
 766                 int socket_type = SE->GetType(activefds[activefd]);
 767                 switch (socket_type)
 768                 {
 769                         case X_ESTAB_CLIENT:
 770
 771                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 772                                 cu = this->fd_ref_table[activefds[activefd]];
 773                                 if (cu)
 774                                         this->ProcessUser(cu);
 775
 776                         break;
 777
 778                         case X_ESTAB_MODULE:
 779
 780                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 781
 782                                 if (!process_module_sockets)
 783                                         break;
 784
 785                                 /* Process module-owned sockets.
 786                                  * Modules are encouraged to inherit their sockets from
 787                                  * InspSocket so we can process them neatly like this.
 788                                  */
 789                                 s = this->socket_ref[activefds[activefd]];
 790
 791                                 if ((s) && (!s->Poll()))
 792                                 {
 793                                         log(DEBUG,"Socket poll returned false, close and bail");
 794                                         SE->DelFd(s->GetFd());
 795                                         this->socket_ref[activefds[activefd]] = NULL;
 796                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 797                                         {
 798                                                 s_del = *a;
 799                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 800                                                 {
 801                                                         module_sockets.erase(a);
 802                                                         break;
 803                                                 }
 804                                         }
 805                                         s->Close();
 806                                         DELETE(s);
 807                                 }
 808                                 else if (!s)
 809                                 {
 810                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 811                                         SE->DelFd(s->GetFd());
 812                                 }
 813                         break;
 814
 815                         case X_ESTAB_DNS:
 816                                 /* Handles instances of the Resolver class,
 817                                  * a simple class extended by modules and the core for
 818                                  * nonblocking resolving of addresses.
 819                                  */
 820                                 this->Res->MarshallReads(activefds[activefd]);
 821                         break;
 822
 823                         case X_LISTEN:
 824
 825                                 log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 826
 827                                 /* It's a listener */
 828                                 uslen = sizeof(sock_us);
 829                                 length = sizeof(client);
 830                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 831
 832                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 833                                 {
 834 #ifdef IPV6
 835                                         in_port = ntohs(sock_us.sin6_port);
 836 #else
 837                                         in_port = ntohs(sock_us.sin_port);
 838 #endif
 839                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 840                                         /* Years and years ago, we used to resolve here
 841                                          * using gethostbyaddr(). That is sucky and we
 842                                          * don't do that any more...
 843                                          */
 844                                         NonBlocking(incomingSockfd);
 845                                         if (Config->GetIOHook(in_port))
 846                                         {
 847                                                 try
 848                                                 {
 849 #ifdef IPV6
 850                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 851 #else
 852                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 853 #endif
 854                                                 }
 855                                                 catch (ModuleException& modexcept)
 856                                                 {
 857                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 858                                                 }
 859                                         }
 860                                         stats->statsAccept++;
 861 #ifdef IPV6
 862                                         log(DEBUG,"Add ipv6 client");
 863                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin6_addr);
 864 #else
 865                                         log(DEBUG,"Add ipv4 client");
 866                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin_addr);
 867 #endif
 868                                         log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 869                                 }
 870                                 else
 871                                 {
 872                                         log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 873                                         shutdown(incomingSockfd,2);
 874                                         close(incomingSockfd);
 875                                         stats->statsRefused++;
 876                                 }
 877                         break;
 878
 879                         default:
 880                                 /* Something went wrong if we're in here.
 881                                  * In fact, so wrong, im not quite sure
 882                                  * what we would do, so for now, its going
 883                                  * to safely do bugger all.
 884                                  */
 885                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 886                                 SE->DelFd(activefds[activefd]);
 887                         break;
 888                 }
 889         }
 890 }
 891
 892 int InspIRCd::Run()
 893 {
 894         this->Res = new DNS(this);
 895
 896         log(DEBUG,"RES: %08x",this->Res);
 897
 898         LoadAllModules(this);
 899
 900         /* Just in case no modules were loaded - fix for bug #101 */
 901         this->BuildISupport();
 902
 903         if (!stats->BoundPortCount)
 904         {
 905                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 906                 Exit(ERROR);
 907         }
 908
 909         /* Add the listening sockets used for client inbound connections
 910          * to the socket engine
 911          */
 912         log(DEBUG,"%d listeners",stats->BoundPortCount);
 913         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 914         {
 915                 log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 916                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 917                 {
 918                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 919                         Exit(ERROR);
 920                 }
 921         }
 922
 923         if (!Config->nofork)
 924         {
 925                 fclose(stdout);
 926                 fclose(stderr);
 927                 fclose(stdin);
 928         }
 929
 930         printf("\nInspIRCd is now running!\n");
 931
 932         this->WritePID(Config->PID);
 933
 934         /* main loop, this never returns */
 935         expire_run = false;
 936         iterations = 0;
 937
 938         while (true)
 939         {
 940                 DoOneIteration(true);
 941         }
 942         /* This is never reached -- we hope! */
 943         return 0;
 944 }
 945
 946 /**********************************************************************************/
 947
 948 /**
 949  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 950  */
 951
 952 int main(int argc, char** argv)
 953 {
 954         /* This is a MatchCIDR() test suite -
 955         printf("Should be 0: %d\n",MatchCIDR("127.0.0.1","1.2.3.4/8"));
 956         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/8"));
 957         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/18"));
 958         printf("Should be 0: %d\n",MatchCIDR("3ffe::0","2fc9::0/16"));
 959         printf("Should be 1: %d\n",MatchCIDR("3ffe:1:3::0", "3ffe:1::0/32"));
 960         exit(0); */
 961
 962         try
 963         {
 964                 try
 965                 {
 966                         ServerInstance = new InspIRCd(argc, argv);
 967                         ServerInstance->Run();
 968                         DELETE(ServerInstance);
 969                 }
 970                 catch (std::bad_alloc&)
 971                 {
 972                         log(SPARSE,"You are out of memory! (got exception std::bad_alloc!)");
 973                         ServerInstance->SendError("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 974                 }
 975         }
 976         catch (...)
 977         {
 978                 log(SPARSE,"Uncaught exception, aborting.");
 979                 ServerInstance->SendError("Server terminating due to uncaught exception.");
 980         }
 981         return 0;
 982 }