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