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