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