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
  82 int iterations = 0;
  83
  84 insp_sockaddr client, server;
  85 socklen_t length;
  86
  87 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  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 Server* MyServer = new Server;
  95 ServerConfig *Config = new ServerConfig;
  96 user_hash clientlist;
  97 chan_hash chanlist;
  98 servernamelist servernames;
  99 char lowermap[255];
 100
 101 void AddServerName(const std::string &servername)
 102 {
 103         log(DEBUG,"Adding server name: %s",servername.c_str());
 104
 105         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
 106                 servernames.push_back(servername); /* Wasn't already there. */
 107 }
 108
 109 const char* FindServerNamePtr(const std::string &servername)
 110 {
 111         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
 112
 113         if(iter == servernames.end())
 114         {
 115                 AddServerName(servername);
 116                 iter = --servernames.end();
 117         }
 118
 119         return iter->c_str();
 120 }
 121
 122 bool FindServerName(const std::string &servername)
 123 {
 124         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 125 }
 126
 127 void Exit(int status)
 128 {
 129         if (Config->log_file)
 130                 fclose(Config->log_file);
 131         send_error("Server shutdown.");
 132         exit (status);
 133 }
 134
 135 void InspIRCd::Start()
 136 {
 137         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 138         printf("(C) ChatSpike Development team.\033[0m\n\n");
 139         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 140         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 141         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 142 }
 143
 144 void Killed(int status)
 145 {
 146         if (Config->log_file)
 147                 fclose(Config->log_file);
 148         send_error("Server terminated.");
 149         exit(status);
 150 }
 151
 152 void Rehash(int status)
 153 {
 154         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 155         fclose(Config->log_file);
 156         OpenLog(NULL,0);
 157         Config->Read(false,NULL);
 158         FOREACH_MOD(I_OnRehash,OnRehash(""));
 159 }
 160
 161 void InspIRCd::SetSignals()
 162 {
 163         signal (SIGALRM, SIG_IGN);
 164         signal (SIGHUP, Rehash);
 165         signal (SIGPIPE, SIG_IGN);
 166         signal (SIGTERM, Exit);
 167         signal (SIGSEGV, Error);
 168 }
 169
 170 bool InspIRCd::DaemonSeed()
 171 {
 172         int childpid;
 173         if ((childpid = fork ()) < 0)
 174                 return (ERROR);
 175         else if (childpid > 0)
 176         {
 177                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 178                 sleep(6);
 179                 exit (0);
 180         }
 181         setsid ();
 182         umask (007);
 183         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 184
 185         rlimit rl;
 186         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 187         {
 188                 log(DEFAULT,"Failed to getrlimit()!");
 189                 return false;
 190         }
 191         else
 192         {
 193                 rl.rlim_cur = rl.rlim_max;
 194                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 195                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 196         }
 197
 198         return true;
 199 }
 200
 201 void InspIRCd::WritePID(const std::string &filename)
 202 {
 203         std::ofstream outfile(filename.c_str());
 204         if (outfile.is_open())
 205         {
 206                 outfile << getpid();
 207                 outfile.close();
 208         }
 209         else
 210         {
 211                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 212                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 213                 Exit(0);
 214         }
 215 }
 216
 217 std::string InspIRCd::GetRevision()
 218 {
 219         return REVISION;
 220 }
 221
 222 void InspIRCd::MakeLowerMap()
 223 {
 224         // initialize the lowercase mapping table
 225         for (unsigned int cn = 0; cn < 256; cn++)
 226                 lowermap[cn] = cn;
 227         // lowercase the uppercase chars
 228         for (unsigned int cn = 65; cn < 91; cn++)
 229                 lowermap[cn] = tolower(cn);
 230         // now replace the specific chars for scandanavian comparison
 231         lowermap[(unsigned)'['] = '{';
 232         lowermap[(unsigned)']'] = '}';
 233         lowermap[(unsigned)'\\'] = '|';
 234 }
 235
 236 InspIRCd::InspIRCd(int argc, char** argv)
 237 {
 238         this->Start();
 239         module_sockets.clear();
 240         init_dns();
 241         this->startup_time = time(NULL);
 242         srand(time(NULL));
 243         log(DEBUG,"*** InspIRCd starting up!");
 244         if (!FileExists(CONFIG_FILE))
 245         {
 246                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 247                 log(DEFAULT,"main: no config");
 248                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 249                 Exit(ERROR);
 250         }
 251         *LOG_FILE = 0;
 252         if (argc > 1) {
 253                 for (int i = 1; i < argc; i++)
 254                 {
 255                         if (!strcmp(argv[i],"-nofork"))
 256                         {
 257                                 Config->nofork = true;
 258                         }
 259                         else if(!strcmp(argv[i],"-debug"))
 260                         {
 261                                 Config->forcedebug = true;
 262                         }
 263                         else if(!strcmp(argv[i],"-nolog"))
 264                         {
 265                                 Config->writelog = false;
 266                         }
 267                         else if (!strcmp(argv[i],"-wait"))
 268                         {
 269                                 sleep(6);
 270                         }
 271                         else if (!strcmp(argv[i],"-nolimit"))
 272                         {
 273                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 274                         }
 275                         else if (!strcmp(argv[i],"-logfile"))
 276                         {
 277                                 if (argc > i+1)
 278                                 {
 279                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 280                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 281                                 }
 282                                 else
 283                                 {
 284                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 285                                         Exit(ERROR);
 286                                 }
 287                         }
 288                 }
 289         }
 290
 291         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 292
 293         this->MakeLowerMap();
 294
 295         OpenLog(argv, argc);
 296         this->stats = new serverstats();
 297         this->Parser = new CommandParser();
 298         Config->ClearStack();
 299         Config->Read(true,NULL);
 300         CheckRoot();
 301         this->ModeGrok = new ModeParser();
 302         AddServerName(Config->ServerName);
 303         CheckDie();
 304         InitializeDisabledCommands(Config->DisabledCommands, this);
 305         stats->BoundPortCount = BindPorts(true);
 306
 307         for(int t = 0; t < 255; t++)
 308                 Config->global_implementation[t] = 0;
 309
 310         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 311
 312         printf("\n");
 313         this->SetSignals();
 314         if (!Config->nofork)
 315         {
 316                 if (!this->DaemonSeed())
 317                 {
 318                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 319                         Exit(ERROR);
 320                 }
 321         }
 322
 323         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 324          * initialize the socket engine.
 325          */
 326         SE = new SocketEngine();
 327
 328         /* We must load the modules AFTER initializing the socket engine, now */
 329
 330         return;
 331 }
 332
 333 std::string InspIRCd::GetVersionString()
 334 {
 335         char versiondata[MAXBUF];
 336 #ifdef THREADED_DNS
 337         char dnsengine[] = "multithread";
 338 #else
 339         char dnsengine[] = "singlethread";
 340 #endif
 341         if (*Config->CustomVersion)
 342         {
 343                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 344         }
 345         else
 346         {
 347                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 348         }
 349         return versiondata;
 350 }
 351
 352 char* InspIRCd::ModuleError()
 353 {
 354         return MODERR;
 355 }
 356
 357 void InspIRCd::EraseFactory(int j)
 358 {
 359         int v = 0;
 360         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 361         {
 362                 if (v == j)
 363                 {
 364                         factory.erase(t);
 365                         factory.push_back(NULL);
 366                         return;
 367                 }
 368                 v++;
 369         }
 370 }
 371
 372 void InspIRCd::EraseModule(int j)
 373 {
 374         int v1 = 0;
 375         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 376         {
 377                 if (v1 == j)
 378                 {
 379                         DELETE(*m);
 380                         modules.erase(m);
 381                         modules.push_back(NULL);
 382                         break;
 383                 }
 384                 v1++;
 385         }
 386         int v2 = 0;
 387         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 388         {
 389                 if (v2 == j)
 390                 {
 391                        Config->module_names.erase(v);
 392                        break;
 393                 }
 394                 v2++;
 395         }
 396
 397 }
 398
 399 void InspIRCd::MoveTo(std::string modulename,int slot)
 400 {
 401         unsigned int v2 = 256;
 402         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 403         {
 404                 if (Config->module_names[v] == modulename)
 405                 {
 406                         // found an instance, swap it with the item at MODCOUNT
 407                         v2 = v;
 408                         break;
 409                 }
 410         }
 411         if ((v2 != (unsigned int)slot) && (v2 < 256))
 412         {
 413                 // Swap the module names over
 414                 Config->module_names[v2] = Config->module_names[slot];
 415                 Config->module_names[slot] = modulename;
 416                 // now swap the module factories
 417                 ircd_module* temp = factory[v2];
 418                 factory[v2] = factory[slot];
 419                 factory[slot] = temp;
 420                 // now swap the module objects
 421                 Module* temp_module = modules[v2];
 422                 modules[v2] = modules[slot];
 423                 modules[slot] = temp_module;
 424                 // now swap the implement lists (we dont
 425                 // need to swap the global or recount it)
 426                 for (int n = 0; n < 255; n++)
 427                 {
 428                         char x = Config->implement_lists[v2][n];
 429                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 430                         Config->implement_lists[slot][n] = x;
 431                 }
 432         }
 433         else
 434         {
 435                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 436         }
 437 }
 438
 439 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 440 {
 441         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 442         {
 443                 if (Config->module_names[v] == after)
 444                 {
 445                         MoveTo(modulename, v);
 446                         return;
 447                 }
 448         }
 449 }
 450
 451 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 452 {
 453         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 454         {
 455                 if (Config->module_names[v] == before)
 456                 {
 457                         if (v > 0)
 458                         {
 459                                 MoveTo(modulename, v-1);
 460                         }
 461                         else
 462                         {
 463                                 MoveTo(modulename, v);
 464                         }
 465                         return;
 466                 }
 467         }
 468 }
 469
 470 void InspIRCd::MoveToFirst(std::string modulename)
 471 {
 472         MoveTo(modulename,0);
 473 }
 474
 475 void InspIRCd::MoveToLast(std::string modulename)
 476 {
 477         MoveTo(modulename,MODCOUNT);
 478 }
 479
 480 void InspIRCd::BuildISupport()
 481 {
 482         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 483         std::stringstream v;
 484         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 485         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 486         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 487         Config->data005 = v.str();
 488         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 489 }
 490
 491 bool InspIRCd::UnloadModule(const char* filename)
 492 {
 493         std::string filename_str = filename;
 494         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 495         {
 496                 if (Config->module_names[j] == filename_str)
 497                 {
 498                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 499                         {
 500                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 501                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 502                                 return false;
 503                         }
 504                         /* Give the module a chance to tidy out all its metadata */
 505                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 506                         {
 507                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 508                         }
 509                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 510                         {
 511                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 512                         }
 513
 514                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 515
 516                         for(int t = 0; t < 255; t++)
 517                         {
 518                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 519                         }
 520
 521                         /* We have to renumber implement_lists after unload because the module numbers change!
 522                          */
 523                         for(int j2 = j; j2 < 254; j2++)
 524                         {
 525                                 for(int t = 0; t < 255; t++)
 526                                 {
 527                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 528                                 }
 529                         }
 530
 531                         // found the module
 532                         log(DEBUG,"Deleting module...");
 533                         this->EraseModule(j);
 534                         log(DEBUG,"Erasing module entry...");
 535                         this->EraseFactory(j);
 536                         log(DEBUG,"Removing dependent commands...");
 537                         Parser->RemoveCommands(filename);
 538                         log(DEFAULT,"Module %s unloaded",filename);
 539                         MODCOUNT--;
 540                         BuildISupport();
 541                         return true;
 542                 }
 543         }
 544         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 545         snprintf(MODERR,MAXBUF,"Module not loaded");
 546         return false;
 547 }
 548
 549 bool InspIRCd::LoadModule(const char* filename)
 550 {
 551         char modfile[MAXBUF];
 552 #ifdef STATIC_LINK
 553         strlcpy(modfile,filename,MAXBUF);
 554 #else
 555         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 556 #endif
 557         std::string filename_str = filename;
 558 #ifndef STATIC_LINK
 559 #ifndef IS_CYGWIN
 560         if (!DirValid(modfile))
 561         {
 562                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 563                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 564                 return false;
 565         }
 566 #endif
 567 #endif
 568         log(DEBUG,"Loading module: %s",modfile);
 569 #ifndef STATIC_LINK
 570         if (FileExists(modfile))
 571         {
 572 #endif
 573                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 574                 {
 575                         if (Config->module_names[j] == filename_str)
 576                         {
 577                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 578                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 579                                 return false;
 580                         }
 581                 }
 582                 ircd_module* a = new ircd_module(modfile);
 583                 factory[MODCOUNT+1] = a;
 584                 if (factory[MODCOUNT+1]->LastError())
 585                 {
 586                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 587                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 588                         return false;
 589                 }
 590                 try
 591                 {
 592                         if (factory[MODCOUNT+1]->factory)
 593                         {
 594                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 595                                 modules[MODCOUNT+1] = m;
 596                                 /* save the module and the module's classfactory, if
 597                                  * this isnt done, random crashes can occur :/ */
 598                                 Config->module_names.push_back(filename);
 599
 600                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 601                                 for(int t = 0; t < 255; t++)
 602                                         x[t] = 0;
 603
 604                                 modules[MODCOUNT+1]->Implements(x);
 605
 606                                 for(int t = 0; t < 255; t++)
 607                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 608                         }
 609                         else
 610                         {
 611                                 log(DEFAULT,"Unable to load %s",modfile);
 612                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 613                                 return false;
 614                         }
 615                 }
 616                 catch (ModuleException& modexcept)
 617                 {
 618                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 619                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 620                         return false;
 621                 }
 622 #ifndef STATIC_LINK
 623         }
 624         else
 625         {
 626                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 627                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 628                 return false;
 629         }
 630 #endif
 631         MODCOUNT++;
 632         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 633         // now work out which modules, if any, want to move to the back of the queue,
 634         // and if they do, move them there.
 635         std::vector<std::string> put_to_back;
 636         std::vector<std::string> put_to_front;
 637         std::map<std::string,std::string> put_before;
 638         std::map<std::string,std::string> put_after;
 639         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 640         {
 641                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 642                 {
 643                         put_to_back.push_back(Config->module_names[j]);
 644                 }
 645                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 646                 {
 647                         put_to_front.push_back(Config->module_names[j]);
 648                 }
 649                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 650                 {
 651                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 652                 }
 653                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 654                 {
 655                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 656                 }
 657         }
 658         for (unsigned int j = 0; j < put_to_back.size(); j++)
 659         {
 660                 MoveToLast(put_to_back[j]);
 661         }
 662         for (unsigned int j = 0; j < put_to_front.size(); j++)
 663         {
 664                 MoveToFirst(put_to_front[j]);
 665         }
 666         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 667         {
 668                 MoveBefore(j->first,j->second);
 669         }
 670         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 671         {
 672                 MoveAfter(j->first,j->second);
 673         }
 674         BuildISupport();
 675         return true;
 676 }
 677
 678 void InspIRCd::DoOneIteration(bool process_module_sockets)
 679 {
 680         int activefds[MAX_DESCRIPTORS];
 681         int incomingSockfd;
 682         int in_port;
 683         userrec* cu = NULL;
 684         InspSocket* s = NULL;
 685         InspSocket* s_del = NULL;
 686         unsigned int numberactive;
 687         insp_sockaddr sock_us;     // our port number
 688         socklen_t uslen;         // length of our port number
 689
 690         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 691          * Once per loop iteration is pleanty.
 692          */
 693         OLDTIME = TIME;
 694         TIME = time(NULL);
 695
 696         /* Run background module timers every few seconds
 697          * (the docs say modules shouldnt rely on accurate
 698          * timing using this event, so we dont have to
 699          * time this exactly).
 700          */
 701         if (((TIME % 5) == 0) && (!expire_run))
 702         {
 703                 expire_lines();
 704                 if (process_module_sockets)
 705                 {
 706                         /* Fix by brain - the addition of DoOneIteration means that this
 707                          * can end up getting called recursively in the following pattern:
 708                          *
 709                          * m_spanningtree DoPingChecks
 710                          * (server pings out and is squit)
 711                          * (squit causes call to DoOneIteration)
 712                          * DoOneIteration enters here
 713                          * calls DoBackground timer
 714                          * enters m_spanningtree DoPingChecks... see step 1.
 715                          *
 716                          * This should do the job and fix the bug.
 717                          */
 718                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 719                 }
 720                 TickMissedTimers(TIME);
 721                 expire_run = true;
 722                 return;
 723         }
 724         else if ((TIME % 5) == 1)
 725         {
 726                 expire_run = false;
 727         }
 728
 729         if (iterations++ == 15)
 730         {
 731                 iterations = 0;
 732                 DoBackgroundUserStuff(TIME);
 733         }
 734
 735         /* Once a second, do the background processing */
 736         if (TIME != OLDTIME)
 737         {
 738                 if (TIME < OLDTIME)
 739                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 740                 if ((TIME % 3600) == 0)
 741                 {
 742                         MaintainWhoWas(TIME);
 743                 }
 744         }
 745
 746         /* Process timeouts on module sockets each time around
 747          * the loop. There shouldnt be many module sockets, at
 748          * most, 20 or so, so this won't be much of a performance
 749          * hit at all.
 750          */
 751         if (process_module_sockets)
 752                 DoSocketTimeouts(TIME);
 753
 754         TickTimers(TIME);
 755
 756         /* Call the socket engine to wait on the active
 757          * file descriptors. The socket engine has everything's
 758          * descriptors in its list... dns, modules, users,
 759          * servers... so its nice and easy, just one call.
 760          */
 761         if (!(numberactive = SE->Wait(activefds)))
 762                 return;
 763
 764         /**
 765          * Now process each of the fd's. For users, we have a fast
 766          * lookup table which can find a user by file descriptor, so
 767          * processing them by fd isnt expensive. If we have a lot of
 768          * listening ports or module sockets though, things could get
 769          * ugly.
 770          */
 771         log(DEBUG,"There are %d fd's to process.",numberactive);
 772
 773         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 774         {
 775                 int socket_type = SE->GetType(activefds[activefd]);
 776                 switch (socket_type)
 777                 {
 778                         case X_ESTAB_CLIENT:
 779
 780                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 781                                 cu = fd_ref_table[activefds[activefd]];
 782                                 if (cu)
 783                                         ProcessUser(cu);
 784
 785                         break;
 786
 787                         case X_ESTAB_MODULE:
 788
 789                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 790
 791                                 if (!process_module_sockets)
 792                                         break;
 793
 794                                 /* Process module-owned sockets.
 795                                  * Modules are encouraged to inherit their sockets from
 796                                  * InspSocket so we can process them neatly like this.
 797                                  */
 798                                 s = socket_ref[activefds[activefd]];
 799
 800                                 if ((s) && (!s->Poll()))
 801                                 {
 802                                         log(DEBUG,"Socket poll returned false, close and bail");
 803                                         SE->DelFd(s->GetFd());
 804                                         socket_ref[activefds[activefd]] = NULL;
 805                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 806                                         {
 807                                                 s_del = *a;
 808                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 809                                                 {
 810                                                         module_sockets.erase(a);
 811                                                         break;
 812                                                 }
 813                                         }
 814                                         s->Close();
 815                                         DELETE(s);
 816                                 }
 817                                 else if (!s)
 818                                 {
 819                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 820                                         SE->DelFd(s->GetFd());
 821                                 }
 822                         break;
 823
 824                         case X_ESTAB_DNS:
 825                                 /* When we are using single-threaded dns,
 826                                  * the sockets for dns end up in our mainloop.
 827                                  * When we are using multi-threaded dns,
 828                                  * each thread has its own basic poll() loop
 829                                  * within it, making them 'fire and forget'
 830                                  * and independent of the mainloop.
 831                                  */
 832 #ifndef THREADED_DNS
 833                                 log(DEBUG,"Type: X_ESTAB_DNS: fd=%d",activefds[activefd]);
 834                                 dns_poll(activefds[activefd]);
 835 #endif
 836                         break;
 837
 838                         case X_ESTAB_CLASSDNS:
 839                                 /* Handles instances of the Resolver class,
 840                                  * a simple class extended by modules for
 841                                  * nonblocking resolving of addresses.
 842                                  */
 843
 844                                 dns_deal_with_classes(activefds[activefd]);
 845                         break;
 846
 847                         case X_LISTEN:
 848
 849                                 log(DEBUG,"Type: X_LISTEN_MODULE: fd=%d",activefds[activefd]);
 850
 851                                 /* It's a listener */
 852                                 uslen = sizeof(sock_us);
 853                                 length = sizeof(client);
 854                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 855
 856                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 857                                 {
 858                                         in_port = ntohs(sock_us.sin_port);
 859                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 860                                         /* Years and years ago, we used to resolve here
 861                                          * using gethostbyaddr(). That is sucky and we
 862                                          * don't do that any more...
 863                                          */
 864                                         NonBlocking(incomingSockfd);
 865                                         if (Config->GetIOHook(in_port))
 866                                         {
 867                                                 try
 868                                                 {
 869                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, inet_ntoa(client.sin_addr), in_port);
 870                                                 }
 871                                                 catch (ModuleException& modexcept)
 872                                                 {
 873                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 874                                                 }
 875                                         }
 876                                         stats->statsAccept++;
 877                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 878                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 879                                 }
 880                                 else
 881                                 {
 882                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 883                                         shutdown(incomingSockfd,2);
 884                                         close(incomingSockfd);
 885                                         stats->statsRefused++;
 886                                 }
 887                         break;
 888
 889                         default:
 890                                 /* Something went wrong if we're in here.
 891                                  * In fact, so wrong, im not quite sure
 892                                  * what we would do, so for now, its going
 893                                  * to safely do bugger all.
 894                                  */
 895                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 896                                 SE->DelFd(activefds[activefd]);
 897                         break;
 898                 }
 899         }
 900 }
 901
 902 int InspIRCd::Run()
 903 {
 904         /* Until THIS point, ServerInstance == NULL */
 905
 906         LoadAllModules(this);
 907
 908         /* Just in case no modules were loaded - fix for bug #101 */
 909         this->BuildISupport();
 910
 911         printf("\nInspIRCd is now running!\n");
 912
 913         if (!Config->nofork)
 914         {
 915                 fclose(stdout);
 916                 fclose(stderr);
 917                 fclose(stdin);
 918         }
 919
 920         /* Add the listening sockets used for client inbound connections
 921          * to the socket engine
 922          */
 923         for (int count = 0; count < stats->BoundPortCount; count++)
 924                 SE->AddFd(Config->openSockfd[count],true,X_LISTEN);
 925
 926         this->WritePID(Config->PID);
 927
 928         /* main loop, this never returns */
 929         expire_run = false;
 930         iterations = 0;
 931
 932         while (true)
 933         {
 934                 DoOneIteration(true);
 935         }
 936         /* This is never reached -- we hope! */
 937         return 0;
 938 }
 939
 940 /**********************************************************************************/
 941
 942 /**
 943  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 944  */
 945
 946 int main(int argc, char** argv)
 947 {
 948         /* TEST SUITE FOR TOKENSTREAM
 949          *
 950          * Expected output:
 951          *
 952          * String: 'PRIVMSG #test FOO BAR'
 953          * Token 0 = 'PRIVMSG'
 954          * Token 1 = '#test'
 955          * Token 2 = 'FOO'
 956          * Token 3 = 'BAR'
 957          * String: 'PRIVMSG #test :FOO BAR BAZ'
 958          * Token 0 = 'PRIVMSG'
 959          * Token 1 = '#test'
 960          * Token 2 = 'FOO BAR BAZ'
 961          * String: ':PRIVMSG #test :FOO BAR BAZ'
 962          * Token 0 = ':PRIVMSG'
 963          * String: 'AAAAAAA'
 964          * Token 0 = 'AAAAAAA'
 965          * String: ''
 966          * NumItems = 0
 967          *
 968         std::string a = "PRIVMSG #test FOO BAR";
 969         printf("String: '%s'\n",a.c_str());
 970         irc::tokenstream test(a);
 971         printf("Token 0 = '%s'\n",test.GetToken().c_str());
 972         printf("Token 1 = '%s'\n",test.GetToken().c_str());
 973         printf("Token 2 = '%s'\n",test.GetToken().c_str());
 974         printf("Token 3 = '%s'\n",test.GetToken().c_str());
 975         printf("Token 4 = '%s'\n",test.GetToken().c_str());
 976
 977         std::string b = "PRIVMSG #test :FOO BAR BAZ";
 978         printf("String: '%s'\n",b.c_str());
 979         irc::tokenstream test2(b);
 980         printf("Token 0 = '%s'\n",test2.GetToken().c_str());
 981         printf("Token 1 = '%s'\n",test2.GetToken().c_str());
 982         printf("Token 2 = '%s'\n",test2.GetToken().c_str());
 983         printf("Token 3 = '%s'\n",test2.GetToken().c_str());
 984
 985         std::string c = ":PRIVMSG #test :FOO BAR BAZ";
 986         printf("String: '%s'\n",c.c_str());
 987         irc::tokenstream test3(c);
 988         printf("Token 0 = '%s'\n",test3.GetToken().c_str());
 989
 990         c = "AAAAAAA";
 991         printf("String: '%s'\n",c.c_str());
 992         irc::tokenstream test4(c);
 993         printf("Token 0 = '%s'\n",test4.GetToken().c_str());
 994         printf("Token 1 = '%s'\n",test4.GetToken().c_str());
 995
 996         c = "";
 997         printf("String: '%s'\n",c.c_str());
 998         irc::tokenstream test5(c);
 999         printf("Token 0 = '%s'\n",test5.GetToken().c_str());
1000
1001         exit(0);
1002         */
1003         try
1004         {
1005                 ServerInstance = new InspIRCd(argc, argv);
1006                 ServerInstance->Run();
1007                 DELETE(ServerInstance);
1008         }
1009         catch (std::bad_alloc)
1010         {
1011                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
1012                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
1013                 printf("Out of memory! (got exception std::bad_alloc!");
1014         }
1015         return 0;
1016 }