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 InspIRCd* ServerInstance;
  69
  70 extern ModuleList modules;
  71 extern FactoryList factory;
  72
  73 std::vector<userrec*> local_users;
  74
  75 extern int MODCOUNT;
  76 extern char LOG_FILE[MAXBUF];
  77
  78 int iterations = 0;
  79
  80 insp_sockaddr client, server;
  81 socklen_t length;
  82
  83 time_t TIME = time(NULL), OLDTIME = time(NULL);
  84
  85 // This table references users by file descriptor.
  86 // its an array to make it VERY fast, as all lookups are referenced
  87 // by an integer, meaning there is no need for a scan/search operation.
  88 userrec* fd_ref_table[MAX_DESCRIPTORS];
  89 Server* MyServer = new Server;
  90 user_hash clientlist;
  91 chan_hash chanlist;
  92 servernamelist servernames;
  93 char lowermap[255];
  94
  95 void AddServerName(const std::string &servername)
  96 {
  97         log(DEBUG,"Adding server name: %s",servername.c_str());
  98
  99         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
 100                 servernames.push_back(servername); /* Wasn't already there. */
 101 }
 102
 103 const char* FindServerNamePtr(const std::string &servername)
 104 {
 105         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
 106
 107         if(iter == servernames.end())
 108         {
 109                 AddServerName(servername);
 110                 iter = --servernames.end();
 111         }
 112
 113         return iter->c_str();
 114 }
 115
 116 bool FindServerName(const std::string &servername)
 117 {
 118         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 119 }
 120
 121 void Exit(int status)
 122 {
 123         if (ServerInstance->Config->log_file)
 124                 fclose(ServerInstance->Config->log_file);
 125         send_error("Server shutdown.");
 126         exit (status);
 127 }
 128
 129 void InspIRCd::Start()
 130 {
 131         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 132         printf("(C) ChatSpike Development team.\033[0m\n\n");
 133         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 134         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 135         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 136 }
 137
 138 void Killed(int status)
 139 {
 140         if (ServerInstance->Config->log_file)
 141                 fclose(ServerInstance->Config->log_file);
 142         send_error("Server terminated.");
 143         exit(status);
 144 }
 145
 146 void Rehash(int status)
 147 {
 148         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 149         fclose(ServerInstance->Config->log_file);
 150         OpenLog(NULL,0);
 151         ServerInstance->Config->Read(false,NULL);
 152         FOREACH_MOD(I_OnRehash,OnRehash(""));
 153 }
 154
 155 void InspIRCd::SetSignals(bool SEGVHandler)
 156 {
 157         signal (SIGALRM, SIG_IGN);
 158         signal (SIGHUP, Rehash);
 159         signal (SIGPIPE, SIG_IGN);
 160         signal (SIGTERM, Exit);
 161         if (SEGVHandler)
 162                 signal (SIGSEGV, Error);
 163 }
 164
 165 bool InspIRCd::DaemonSeed()
 166 {
 167         int childpid;
 168         if ((childpid = fork ()) < 0)
 169                 return (ERROR);
 170         else if (childpid > 0)
 171         {
 172                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 173                 sleep(6);
 174                 exit (0);
 175         }
 176         setsid ();
 177         umask (007);
 178         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 179
 180         rlimit rl;
 181         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 182         {
 183                 log(DEFAULT,"Failed to getrlimit()!");
 184                 return false;
 185         }
 186         else
 187         {
 188                 rl.rlim_cur = rl.rlim_max;
 189                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 190                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 191         }
 192
 193         return true;
 194 }
 195
 196 void InspIRCd::WritePID(const std::string &filename)
 197 {
 198         std::ofstream outfile(filename.c_str());
 199         if (outfile.is_open())
 200         {
 201                 outfile << getpid();
 202                 outfile.close();
 203         }
 204         else
 205         {
 206                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 207                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 208                 Exit(0);
 209         }
 210 }
 211
 212 std::string InspIRCd::GetRevision()
 213 {
 214         return REVISION;
 215 }
 216
 217 void InspIRCd::MakeLowerMap()
 218 {
 219         // initialize the lowercase mapping table
 220         for (unsigned int cn = 0; cn < 256; cn++)
 221                 lowermap[cn] = cn;
 222         // lowercase the uppercase chars
 223         for (unsigned int cn = 65; cn < 91; cn++)
 224                 lowermap[cn] = tolower(cn);
 225         // now replace the specific chars for scandanavian comparison
 226         lowermap[(unsigned)'['] = '{';
 227         lowermap[(unsigned)']'] = '}';
 228         lowermap[(unsigned)'\\'] = '|';
 229 }
 230
 231 InspIRCd::InspIRCd(int argc, char** argv)
 232 {
 233         bool SEGVHandler = false;
 234         this->Config = new ServerConfig;
 235         ServerInstance = this;
 236         this->Start();
 237         this->module_sockets.clear();
 238         this->startup_time = time(NULL);
 239         srand(time(NULL));
 240         log(DEBUG,"*** InspIRCd starting up!");
 241         if (!FileExists(CONFIG_FILE))
 242         {
 243                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 244                 log(DEFAULT,"main: no config");
 245                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 246                 Exit(ERROR);
 247         }
 248         *LOG_FILE = 0;
 249         if (argc > 1) {
 250                 for (int i = 1; i < argc; i++)
 251                 {
 252                         if (!strcmp(argv[i],"-nofork"))
 253                         {
 254                                 Config->nofork = true;
 255                         }
 256                         else if(!strcmp(argv[i],"-debug"))
 257                         {
 258                                 Config->forcedebug = true;
 259                         }
 260                         else if(!strcmp(argv[i],"-nolog"))
 261                         {
 262                                 Config->writelog = false;
 263                         }
 264                         else if (!strcmp(argv[i],"-wait"))
 265                         {
 266                                 sleep(6);
 267                         }
 268                         else if (!strcmp(argv[i],"-nolimit"))
 269                         {
 270                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 271                         }
 272                         else if (!strcmp(argv[i],"-notraceback"))
 273                         {
 274                                 SEGVHandler = false;
 275                         }
 276                         else if (!strcmp(argv[i],"-logfile"))
 277                         {
 278                                 if (argc > i+1)
 279                                 {
 280                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 281                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 282                                 }
 283                                 else
 284                                 {
 285                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 286                                         Exit(ERROR);
 287                                 }
 288                                 i++;
 289                         }
 290                         else
 291                         {
 292                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 293                                 Exit(ERROR);
 294                         }
 295                 }
 296         }
 297
 298         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 299
 300         this->MakeLowerMap();
 301
 302         OpenLog(argv, argc);
 303         this->stats = new serverstats();
 304         this->Parser = new CommandParser();
 305         Config->ClearStack();
 306         Config->Read(true, NULL);
 307         CheckRoot();
 308         this->ModeGrok = new ModeParser();
 309         AddServerName(Config->ServerName);
 310         CheckDie();
 311         InitializeDisabledCommands(Config->DisabledCommands, this);
 312         stats->BoundPortCount = BindPorts(true);
 313
 314         for(int t = 0; t < 255; t++)
 315                 Config->global_implementation[t] = 0;
 316
 317         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 318
 319         printf("\n");
 320         this->SetSignals(SEGVHandler);
 321         if (!Config->nofork)
 322         {
 323                 if (!this->DaemonSeed())
 324                 {
 325                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 326                         Exit(ERROR);
 327                 }
 328         }
 329
 330         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 331          * initialize the socket engine.
 332          */
 333         SocketEngineFactory* SEF = new SocketEngineFactory();
 334         SE = SEF->Create();
 335         delete SEF;
 336
 337         /* We must load the modules AFTER initializing the socket engine, now */
 338
 339         return;
 340 }
 341
 342 std::string InspIRCd::GetVersionString()
 343 {
 344         char versiondata[MAXBUF];
 345         char dnsengine[] = "singlethread-object";
 346         if (*Config->CustomVersion)
 347         {
 348                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 349         }
 350         else
 351         {
 352                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 353         }
 354         return versiondata;
 355 }
 356
 357 char* InspIRCd::ModuleError()
 358 {
 359         return MODERR;
 360 }
 361
 362 void InspIRCd::EraseFactory(int j)
 363 {
 364         int v = 0;
 365         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 366         {
 367                 if (v == j)
 368                 {
 369                         factory.erase(t);
 370                         factory.push_back(NULL);
 371                         return;
 372                 }
 373                 v++;
 374         }
 375 }
 376
 377 void InspIRCd::EraseModule(int j)
 378 {
 379         int v1 = 0;
 380         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 381         {
 382                 if (v1 == j)
 383                 {
 384                         DELETE(*m);
 385                         modules.erase(m);
 386                         modules.push_back(NULL);
 387                         break;
 388                 }
 389                 v1++;
 390         }
 391         int v2 = 0;
 392         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 393         {
 394                 if (v2 == j)
 395                 {
 396                        Config->module_names.erase(v);
 397                        break;
 398                 }
 399                 v2++;
 400         }
 401
 402 }
 403
 404 void InspIRCd::MoveTo(std::string modulename,int slot)
 405 {
 406         unsigned int v2 = 256;
 407         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 408         {
 409                 if (Config->module_names[v] == modulename)
 410                 {
 411                         // found an instance, swap it with the item at MODCOUNT
 412                         v2 = v;
 413                         break;
 414                 }
 415         }
 416         if ((v2 != (unsigned int)slot) && (v2 < 256))
 417         {
 418                 // Swap the module names over
 419                 Config->module_names[v2] = Config->module_names[slot];
 420                 Config->module_names[slot] = modulename;
 421                 // now swap the module factories
 422                 ircd_module* temp = factory[v2];
 423                 factory[v2] = factory[slot];
 424                 factory[slot] = temp;
 425                 // now swap the module objects
 426                 Module* temp_module = modules[v2];
 427                 modules[v2] = modules[slot];
 428                 modules[slot] = temp_module;
 429                 // now swap the implement lists (we dont
 430                 // need to swap the global or recount it)
 431                 for (int n = 0; n < 255; n++)
 432                 {
 433                         char x = Config->implement_lists[v2][n];
 434                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 435                         Config->implement_lists[slot][n] = x;
 436                 }
 437         }
 438         else
 439         {
 440                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 441         }
 442 }
 443
 444 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 445 {
 446         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 447         {
 448                 if (Config->module_names[v] == after)
 449                 {
 450                         MoveTo(modulename, v);
 451                         return;
 452                 }
 453         }
 454 }
 455
 456 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 457 {
 458         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 459         {
 460                 if (Config->module_names[v] == before)
 461                 {
 462                         if (v > 0)
 463                         {
 464                                 MoveTo(modulename, v-1);
 465                         }
 466                         else
 467                         {
 468                                 MoveTo(modulename, v);
 469                         }
 470                         return;
 471                 }
 472         }
 473 }
 474
 475 void InspIRCd::MoveToFirst(std::string modulename)
 476 {
 477         MoveTo(modulename,0);
 478 }
 479
 480 void InspIRCd::MoveToLast(std::string modulename)
 481 {
 482         MoveTo(modulename,MODCOUNT);
 483 }
 484
 485 void InspIRCd::BuildISupport()
 486 {
 487         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 488         std::stringstream v;
 489         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 490         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 491         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 492         Config->data005 = v.str();
 493         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 494 }
 495
 496 bool InspIRCd::UnloadModule(const char* filename)
 497 {
 498         std::string filename_str = filename;
 499         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 500         {
 501                 if (Config->module_names[j] == filename_str)
 502                 {
 503                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 504                         {
 505                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 506                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 507                                 return false;
 508                         }
 509                         /* Give the module a chance to tidy out all its metadata */
 510                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 511                         {
 512                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 513                         }
 514                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 515                         {
 516                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 517                         }
 518
 519                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 520
 521                         for(int t = 0; t < 255; t++)
 522                         {
 523                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 524                         }
 525
 526                         /* We have to renumber implement_lists after unload because the module numbers change!
 527                          */
 528                         for(int j2 = j; j2 < 254; j2++)
 529                         {
 530                                 for(int t = 0; t < 255; t++)
 531                                 {
 532                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 533                                 }
 534                         }
 535
 536                         // found the module
 537                         log(DEBUG,"Removing dependent commands...");
 538                         Parser->RemoveCommands(filename);
 539                         log(DEBUG,"Deleting module...");
 540                         this->EraseModule(j);
 541                         log(DEBUG,"Erasing module entry...");
 542                         this->EraseFactory(j);
 543                         log(DEFAULT,"Module %s unloaded",filename);
 544                         MODCOUNT--;
 545                         BuildISupport();
 546                         return true;
 547                 }
 548         }
 549         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 550         snprintf(MODERR,MAXBUF,"Module not loaded");
 551         return false;
 552 }
 553
 554 bool InspIRCd::LoadModule(const char* filename)
 555 {
 556         char modfile[MAXBUF];
 557 #ifdef STATIC_LINK
 558         strlcpy(modfile,filename,MAXBUF);
 559 #else
 560         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 561 #endif
 562         std::string filename_str = filename;
 563 #ifndef STATIC_LINK
 564 #ifndef IS_CYGWIN
 565         if (!DirValid(modfile))
 566         {
 567                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 568                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 569                 return false;
 570         }
 571 #endif
 572 #endif
 573         log(DEBUG,"Loading module: %s",modfile);
 574 #ifndef STATIC_LINK
 575         if (FileExists(modfile))
 576         {
 577 #endif
 578                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 579                 {
 580                         if (Config->module_names[j] == filename_str)
 581                         {
 582                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 583                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 584                                 return false;
 585                         }
 586                 }
 587                 try
 588                 {
 589                         ircd_module* a = new ircd_module(modfile);
 590                         factory[MODCOUNT+1] = a;
 591                         if (factory[MODCOUNT+1]->LastError())
 592                         {
 593                                 log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 594                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 595                                 return false;
 596                         }
 597                         if ((int)factory[MODCOUNT+1]->factory != -1)
 598                         {
 599                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 600                                 modules[MODCOUNT+1] = m;
 601                                 /* save the module and the module's classfactory, if
 602                                  * this isnt done, random crashes can occur :/ */
 603                                 Config->module_names.push_back(filename);
 604
 605                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 606                                 for(int t = 0; t < 255; t++)
 607                                         x[t] = 0;
 608
 609                                 modules[MODCOUNT+1]->Implements(x);
 610
 611                                 for(int t = 0; t < 255; t++)
 612                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 613                         }
 614                         else
 615                         {
 616                                 log(DEFAULT,"Unable to load %s",modfile);
 617                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 618                                 return false;
 619                         }
 620                 }
 621                 catch (ModuleException& modexcept)
 622                 {
 623                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 624                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 625                         return false;
 626                 }
 627 #ifndef STATIC_LINK
 628         }
 629         else
 630         {
 631                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 632                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 633                 return false;
 634         }
 635 #endif
 636         MODCOUNT++;
 637         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 638         // now work out which modules, if any, want to move to the back of the queue,
 639         // and if they do, move them there.
 640         std::vector<std::string> put_to_back;
 641         std::vector<std::string> put_to_front;
 642         std::map<std::string,std::string> put_before;
 643         std::map<std::string,std::string> put_after;
 644         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 645         {
 646                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 647                 {
 648                         put_to_back.push_back(Config->module_names[j]);
 649                 }
 650                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 651                 {
 652                         put_to_front.push_back(Config->module_names[j]);
 653                 }
 654                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 655                 {
 656                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 657                 }
 658                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 659                 {
 660                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 661                 }
 662         }
 663         for (unsigned int j = 0; j < put_to_back.size(); j++)
 664         {
 665                 MoveToLast(put_to_back[j]);
 666         }
 667         for (unsigned int j = 0; j < put_to_front.size(); j++)
 668         {
 669                 MoveToFirst(put_to_front[j]);
 670         }
 671         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 672         {
 673                 MoveBefore(j->first,j->second);
 674         }
 675         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 676         {
 677                 MoveAfter(j->first,j->second);
 678         }
 679         BuildISupport();
 680         return true;
 681 }
 682
 683 void InspIRCd::DoOneIteration(bool process_module_sockets)
 684 {
 685         int activefds[MAX_DESCRIPTORS];
 686         int incomingSockfd;
 687         int in_port;
 688         userrec* cu = NULL;
 689         InspSocket* s = NULL;
 690         InspSocket* s_del = NULL;
 691         unsigned int numberactive;
 692         insp_sockaddr sock_us;     // our port number
 693         socklen_t uslen;         // length of our port number
 694
 695         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 696          * Once per loop iteration is pleanty.
 697          */
 698         OLDTIME = TIME;
 699         TIME = time(NULL);
 700
 701         /* Run background module timers every few seconds
 702          * (the docs say modules shouldnt rely on accurate
 703          * timing using this event, so we dont have to
 704          * time this exactly).
 705          */
 706         if (((TIME % 5) == 0) && (!expire_run))
 707         {
 708                 expire_lines();
 709                 if (process_module_sockets)
 710                 {
 711                         /* Fix by brain - the addition of DoOneIteration means that this
 712                          * can end up getting called recursively in the following pattern:
 713                          *
 714                          * m_spanningtree DoPingChecks
 715                          * (server pings out and is squit)
 716                          * (squit causes call to DoOneIteration)
 717                          * DoOneIteration enters here
 718                          * calls DoBackground timer
 719                          * enters m_spanningtree DoPingChecks... see step 1.
 720                          *
 721                          * This should do the job and fix the bug.
 722                          */
 723                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 724                 }
 725                 TickMissedTimers(TIME);
 726                 expire_run = true;
 727                 return;
 728         }
 729         else if ((TIME % 5) == 1)
 730         {
 731                 expire_run = false;
 732         }
 733
 734         if (iterations++ == 15)
 735         {
 736                 iterations = 0;
 737                 DoBackgroundUserStuff(TIME);
 738         }
 739
 740         /* Once a second, do the background processing */
 741         if (TIME != OLDTIME)
 742         {
 743                 if (TIME < OLDTIME)
 744                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 745                 if ((TIME % 3600) == 0)
 746                 {
 747                         irc::whowas::MaintainWhoWas(TIME);
 748                 }
 749         }
 750
 751         /* Process timeouts on module sockets each time around
 752          * the loop. There shouldnt be many module sockets, at
 753          * most, 20 or so, so this won't be much of a performance
 754          * hit at all.
 755          */
 756         if (process_module_sockets)
 757                 DoSocketTimeouts(TIME,this);
 758
 759         TickTimers(TIME);
 760
 761         /* Call the socket engine to wait on the active
 762          * file descriptors. The socket engine has everything's
 763          * descriptors in its list... dns, modules, users,
 764          * servers... so its nice and easy, just one call.
 765          */
 766         if (!(numberactive = SE->Wait(activefds)))
 767                 return;
 768
 769         /**
 770          * Now process each of the fd's. For users, we have a fast
 771          * lookup table which can find a user by file descriptor, so
 772          * processing them by fd isnt expensive. If we have a lot of
 773          * listening ports or module sockets though, things could get
 774          * ugly.
 775          */
 776         log(DEBUG,"There are %d fd's to process.",numberactive);
 777
 778         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 779         {
 780                 int socket_type = SE->GetType(activefds[activefd]);
 781                 switch (socket_type)
 782                 {
 783                         case X_ESTAB_CLIENT:
 784
 785                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 786                                 cu = fd_ref_table[activefds[activefd]];
 787                                 if (cu)
 788                                         ProcessUser(cu);
 789
 790                         break;
 791
 792                         case X_ESTAB_MODULE:
 793
 794                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 795
 796                                 if (!process_module_sockets)
 797                                         break;
 798
 799                                 /* Process module-owned sockets.
 800                                  * Modules are encouraged to inherit their sockets from
 801                                  * InspSocket so we can process them neatly like this.
 802                                  */
 803                                 s = this->socket_ref[activefds[activefd]];
 804
 805                                 if ((s) && (!s->Poll()))
 806                                 {
 807                                         log(DEBUG,"Socket poll returned false, close and bail");
 808                                         SE->DelFd(s->GetFd());
 809                                         this->socket_ref[activefds[activefd]] = NULL;
 810                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 811                                         {
 812                                                 s_del = *a;
 813                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 814                                                 {
 815                                                         module_sockets.erase(a);
 816                                                         break;
 817                                                 }
 818                                         }
 819                                         s->Close();
 820                                         DELETE(s);
 821                                 }
 822                                 else if (!s)
 823                                 {
 824                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 825                                         SE->DelFd(s->GetFd());
 826                                 }
 827                         break;
 828
 829                         case X_ESTAB_DNS:
 830                                 /* Handles instances of the Resolver class,
 831                                  * a simple class extended by modules and the core for
 832                                  * nonblocking resolving of addresses.
 833                                  */
 834                                 this->Res->MarshallReads(activefds[activefd]);
 835                         break;
 836
 837                         case X_LISTEN:
 838
 839                                 log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 840
 841                                 /* It's a listener */
 842                                 uslen = sizeof(sock_us);
 843                                 length = sizeof(client);
 844                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 845
 846                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 847                                 {
 848 #ifdef IPV6
 849                                         in_port = ntohs(sock_us.sin6_port);
 850 #else
 851                                         in_port = ntohs(sock_us.sin_port);
 852 #endif
 853                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 854                                         /* Years and years ago, we used to resolve here
 855                                          * using gethostbyaddr(). That is sucky and we
 856                                          * don't do that any more...
 857                                          */
 858                                         NonBlocking(incomingSockfd);
 859                                         if (Config->GetIOHook(in_port))
 860                                         {
 861                                                 try
 862                                                 {
 863 #ifdef IPV6
 864                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 865 #else
 866                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 867 #endif
 868                                                 }
 869                                                 catch (ModuleException& modexcept)
 870                                                 {
 871                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 872                                                 }
 873                                         }
 874                                         stats->statsAccept++;
 875 #ifdef IPV6
 876                                         log(DEBUG,"Add ipv6 client");
 877                                         AddClient(incomingSockfd, in_port, false, client.sin6_addr);
 878 #else
 879                                         log(DEBUG,"Add ipv4 client");
 880                                         userrec::AddClient(incomingSockfd, in_port, false, client.sin_addr);
 881 #endif
 882                                         log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 883                                 }
 884                                 else
 885                                 {
 886                                         log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 887                                         shutdown(incomingSockfd,2);
 888                                         close(incomingSockfd);
 889                                         stats->statsRefused++;
 890                                 }
 891                         break;
 892
 893                         default:
 894                                 /* Something went wrong if we're in here.
 895                                  * In fact, so wrong, im not quite sure
 896                                  * what we would do, so for now, its going
 897                                  * to safely do bugger all.
 898                                  */
 899                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 900                                 SE->DelFd(activefds[activefd]);
 901                         break;
 902                 }
 903         }
 904 }
 905
 906 int InspIRCd::Run()
 907 {
 908         this->Res = new DNS();
 909
 910         LoadAllModules(this);
 911
 912         /* Just in case no modules were loaded - fix for bug #101 */
 913         this->BuildISupport();
 914
 915         if (!stats->BoundPortCount)
 916         {
 917                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 918                 Exit(ERROR);
 919         }
 920
 921         /* Add the listening sockets used for client inbound connections
 922          * to the socket engine
 923          */
 924         log(DEBUG,"%d listeners",stats->BoundPortCount);
 925         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 926         {
 927                 log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 928                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 929                 {
 930                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 931                         Exit(ERROR);
 932                 }
 933         }
 934
 935         if (!Config->nofork)
 936         {
 937                 fclose(stdout);
 938                 fclose(stderr);
 939                 fclose(stdin);
 940         }
 941
 942         printf("\nInspIRCd is now running!\n");
 943
 944         this->WritePID(Config->PID);
 945
 946         /* main loop, this never returns */
 947         expire_run = false;
 948         iterations = 0;
 949
 950         while (true)
 951         {
 952                 DoOneIteration(true);
 953         }
 954         /* This is never reached -- we hope! */
 955         return 0;
 956 }
 957
 958 /**********************************************************************************/
 959
 960 /**
 961  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 962  */
 963
 964 int main(int argc, char** argv)
 965 {
 966         /* This is a MatchCIDR() test suite -
 967         printf("Should be 0: %d\n",MatchCIDR("127.0.0.1","1.2.3.4/8"));
 968         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/8"));
 969         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/18"));
 970         printf("Should be 0: %d\n",MatchCIDR("3ffe::0","2fc9::0/16"));
 971         printf("Should be 1: %d\n",MatchCIDR("3ffe:1:3::0", "3ffe:1::0/32"));
 972         exit(0); */
 973
 974         try
 975         {
 976                 ServerInstance = new InspIRCd(argc, argv);
 977                 ServerInstance->Run();
 978                 DELETE(ServerInstance);
 979         }
 980         catch (std::bad_alloc)
 981         {
 982                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
 983                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 984                 printf("Out of memory! (got exception std::bad_alloc!");
 985         }
 986         return 0;
 987 }