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 "inspircd_se_config.h"
  67 #include "userprocess.h"
  68 #include "socket.h"
  69 #include "typedefs.h"
  70 #include "command_parse.h"
  71
  72 InspIRCd* ServerInstance;
  73
  74 extern ModuleList modules;
  75 extern FactoryList factory;
  76
  77 std::vector<InspSocket*> module_sockets;
  78 std::vector<userrec*> local_users;
  79
  80 extern int MODCOUNT;
  81 extern char LOG_FILE[MAXBUF];
  82
  83 int iterations = 0;
  84
  85 insp_sockaddr client, server;
  86 socklen_t length;
  87
  88 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  89 time_t TIME = time(NULL), OLDTIME = time(NULL);
  90
  91 // This table references users by file descriptor.
  92 // its an array to make it VERY fast, as all lookups are referenced
  93 // by an integer, meaning there is no need for a scan/search operation.
  94 userrec* fd_ref_table[MAX_DESCRIPTORS];
  95 Server* MyServer = new Server;
  96 ServerConfig *Config = new ServerConfig;
  97 user_hash clientlist;
  98 chan_hash chanlist;
  99 servernamelist servernames;
 100 char lowermap[255];
 101
 102 void AddServerName(const std::string &servername)
 103 {
 104         log(DEBUG,"Adding server name: %s",servername.c_str());
 105
 106         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
 107                 servernames.push_back(servername); /* Wasn't already there. */
 108 }
 109
 110 const char* FindServerNamePtr(const std::string &servername)
 111 {
 112         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
 113
 114         if(iter == servernames.end())
 115         {
 116                 AddServerName(servername);
 117                 iter = --servernames.end();
 118         }
 119
 120         return iter->c_str();
 121 }
 122
 123 bool FindServerName(const std::string &servername)
 124 {
 125         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 126 }
 127
 128 void Exit(int status)
 129 {
 130         if (Config->log_file)
 131                 fclose(Config->log_file);
 132         send_error("Server shutdown.");
 133         exit (status);
 134 }
 135
 136 void InspIRCd::Start()
 137 {
 138         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 139         printf("(C) ChatSpike Development team.\033[0m\n\n");
 140         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 141         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 142         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 143 }
 144
 145 void Killed(int status)
 146 {
 147         if (Config->log_file)
 148                 fclose(Config->log_file);
 149         send_error("Server terminated.");
 150         exit(status);
 151 }
 152
 153 void Rehash(int status)
 154 {
 155         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 156         fclose(Config->log_file);
 157         OpenLog(NULL,0);
 158         Config->Read(false,NULL);
 159         FOREACH_MOD(I_OnRehash,OnRehash(""));
 160 }
 161
 162 void InspIRCd::SetSignals()
 163 {
 164         signal (SIGALRM, SIG_IGN);
 165         signal (SIGHUP, Rehash);
 166         signal (SIGPIPE, SIG_IGN);
 167         signal (SIGTERM, Exit);
 168         signal (SIGSEGV, Error);
 169 }
 170
 171 bool InspIRCd::DaemonSeed()
 172 {
 173         int childpid;
 174         if ((childpid = fork ()) < 0)
 175                 return (ERROR);
 176         else if (childpid > 0)
 177         {
 178                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 179                 sleep(6);
 180                 exit (0);
 181         }
 182         setsid ();
 183         umask (007);
 184         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 185
 186         rlimit rl;
 187         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 188         {
 189                 log(DEFAULT,"Failed to getrlimit()!");
 190                 return false;
 191         }
 192         else
 193         {
 194                 rl.rlim_cur = rl.rlim_max;
 195                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 196                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 197         }
 198
 199         return true;
 200 }
 201
 202 void InspIRCd::WritePID(const std::string &filename)
 203 {
 204         std::ofstream outfile(filename.c_str());
 205         if (outfile.is_open())
 206         {
 207                 outfile << getpid();
 208                 outfile.close();
 209         }
 210         else
 211         {
 212                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 213                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 214                 Exit(0);
 215         }
 216 }
 217
 218 std::string InspIRCd::GetRevision()
 219 {
 220         return REVISION;
 221 }
 222
 223 void InspIRCd::MakeLowerMap()
 224 {
 225         // initialize the lowercase mapping table
 226         for (unsigned int cn = 0; cn < 256; cn++)
 227                 lowermap[cn] = cn;
 228         // lowercase the uppercase chars
 229         for (unsigned int cn = 65; cn < 91; cn++)
 230                 lowermap[cn] = tolower(cn);
 231         // now replace the specific chars for scandanavian comparison
 232         lowermap[(unsigned)'['] = '{';
 233         lowermap[(unsigned)']'] = '}';
 234         lowermap[(unsigned)'\\'] = '|';
 235 }
 236
 237 InspIRCd::InspIRCd(int argc, char** argv)
 238 {
 239         this->Start();
 240         module_sockets.clear();
 241         init_dns();
 242         this->startup_time = time(NULL);
 243         srand(time(NULL));
 244         log(DEBUG,"*** InspIRCd starting up!");
 245         if (!FileExists(CONFIG_FILE))
 246         {
 247                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 248                 log(DEFAULT,"main: no config");
 249                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 250                 Exit(ERROR);
 251         }
 252         *LOG_FILE = 0;
 253         if (argc > 1) {
 254                 for (int i = 1; i < argc; i++)
 255                 {
 256                         if (!strcmp(argv[i],"-nofork"))
 257                         {
 258                                 Config->nofork = true;
 259                         }
 260                         else if(!strcmp(argv[i],"-debug"))
 261                         {
 262                                 Config->forcedebug = true;
 263                         }
 264                         else if(!strcmp(argv[i],"-nolog"))
 265                         {
 266                                 Config->writelog = false;
 267                         }
 268                         else if (!strcmp(argv[i],"-wait"))
 269                         {
 270                                 sleep(6);
 271                         }
 272                         else if (!strcmp(argv[i],"-nolimit"))
 273                         {
 274                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 275                         }
 276                         else if (!strcmp(argv[i],"-logfile"))
 277                         {
 278                                 if (argc > i+1)
 279                                 {
 280                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 281                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 282                                 }
 283                                 else
 284                                 {
 285                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 286                                         Exit(ERROR);
 287                                 }
 288                         }
 289                 }
 290         }
 291
 292         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 293
 294         this->MakeLowerMap();
 295
 296         OpenLog(argv, argc);
 297         this->stats = new serverstats();
 298         this->Parser = new CommandParser();
 299         Config->ClearStack();
 300         Config->Read(true,NULL);
 301         CheckRoot();
 302         this->ModeGrok = new ModeParser();
 303         AddServerName(Config->ServerName);
 304         CheckDie();
 305         InitializeDisabledCommands(Config->DisabledCommands, this);
 306         stats->BoundPortCount = BindPorts(true);
 307
 308         for(int t = 0; t < 255; t++)
 309                 Config->global_implementation[t] = 0;
 310
 311         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 312
 313         printf("\n");
 314         this->SetSignals();
 315         if (!Config->nofork)
 316         {
 317                 if (!this->DaemonSeed())
 318                 {
 319                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 320                         Exit(ERROR);
 321                 }
 322         }
 323
 324         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 325          * initialize the socket engine.
 326          */
 327         SocketEngineFactory* SEF = new SocketEngineFactory();
 328         SE = SEF->Create();
 329         delete SEF;
 330
 331         /* We must load the modules AFTER initializing the socket engine, now */
 332
 333         return;
 334 }
 335
 336 std::string InspIRCd::GetVersionString()
 337 {
 338         char versiondata[MAXBUF];
 339 #ifdef THREADED_DNS
 340         char dnsengine[] = "multithread";
 341 #else
 342         char dnsengine[] = "singlethread";
 343 #endif
 344         if (*Config->CustomVersion)
 345         {
 346                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 347         }
 348         else
 349         {
 350                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 351         }
 352         return versiondata;
 353 }
 354
 355 char* InspIRCd::ModuleError()
 356 {
 357         return MODERR;
 358 }
 359
 360 void InspIRCd::EraseFactory(int j)
 361 {
 362         int v = 0;
 363         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 364         {
 365                 if (v == j)
 366                 {
 367                         factory.erase(t);
 368                         factory.push_back(NULL);
 369                         return;
 370                 }
 371                 v++;
 372         }
 373 }
 374
 375 void InspIRCd::EraseModule(int j)
 376 {
 377         int v1 = 0;
 378         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 379         {
 380                 if (v1 == j)
 381                 {
 382                         DELETE(*m);
 383                         modules.erase(m);
 384                         modules.push_back(NULL);
 385                         break;
 386                 }
 387                 v1++;
 388         }
 389         int v2 = 0;
 390         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 391         {
 392                 if (v2 == j)
 393                 {
 394                        Config->module_names.erase(v);
 395                        break;
 396                 }
 397                 v2++;
 398         }
 399
 400 }
 401
 402 void InspIRCd::MoveTo(std::string modulename,int slot)
 403 {
 404         unsigned int v2 = 256;
 405         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 406         {
 407                 if (Config->module_names[v] == modulename)
 408                 {
 409                         // found an instance, swap it with the item at MODCOUNT
 410                         v2 = v;
 411                         break;
 412                 }
 413         }
 414         if ((v2 != (unsigned int)slot) && (v2 < 256))
 415         {
 416                 // Swap the module names over
 417                 Config->module_names[v2] = Config->module_names[slot];
 418                 Config->module_names[slot] = modulename;
 419                 // now swap the module factories
 420                 ircd_module* temp = factory[v2];
 421                 factory[v2] = factory[slot];
 422                 factory[slot] = temp;
 423                 // now swap the module objects
 424                 Module* temp_module = modules[v2];
 425                 modules[v2] = modules[slot];
 426                 modules[slot] = temp_module;
 427                 // now swap the implement lists (we dont
 428                 // need to swap the global or recount it)
 429                 for (int n = 0; n < 255; n++)
 430                 {
 431                         char x = Config->implement_lists[v2][n];
 432                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 433                         Config->implement_lists[slot][n] = x;
 434                 }
 435         }
 436         else
 437         {
 438                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 439         }
 440 }
 441
 442 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 443 {
 444         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 445         {
 446                 if (Config->module_names[v] == after)
 447                 {
 448                         MoveTo(modulename, v);
 449                         return;
 450                 }
 451         }
 452 }
 453
 454 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 455 {
 456         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 457         {
 458                 if (Config->module_names[v] == before)
 459                 {
 460                         if (v > 0)
 461                         {
 462                                 MoveTo(modulename, v-1);
 463                         }
 464                         else
 465                         {
 466                                 MoveTo(modulename, v);
 467                         }
 468                         return;
 469                 }
 470         }
 471 }
 472
 473 void InspIRCd::MoveToFirst(std::string modulename)
 474 {
 475         MoveTo(modulename,0);
 476 }
 477
 478 void InspIRCd::MoveToLast(std::string modulename)
 479 {
 480         MoveTo(modulename,MODCOUNT);
 481 }
 482
 483 void InspIRCd::BuildISupport()
 484 {
 485         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 486         std::stringstream v;
 487         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 488         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 489         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 490         Config->data005 = v.str();
 491         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 492 }
 493
 494 bool InspIRCd::UnloadModule(const char* filename)
 495 {
 496         std::string filename_str = filename;
 497         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 498         {
 499                 if (Config->module_names[j] == filename_str)
 500                 {
 501                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 502                         {
 503                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 504                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 505                                 return false;
 506                         }
 507                         /* Give the module a chance to tidy out all its metadata */
 508                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 509                         {
 510                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 511                         }
 512                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 513                         {
 514                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 515                         }
 516
 517                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 518
 519                         for(int t = 0; t < 255; t++)
 520                         {
 521                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 522                         }
 523
 524                         /* We have to renumber implement_lists after unload because the module numbers change!
 525                          */
 526                         for(int j2 = j; j2 < 254; j2++)
 527                         {
 528                                 for(int t = 0; t < 255; t++)
 529                                 {
 530                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 531                                 }
 532                         }
 533
 534                         // found the module
 535                         log(DEBUG,"Deleting module...");
 536                         this->EraseModule(j);
 537                         log(DEBUG,"Erasing module entry...");
 538                         this->EraseFactory(j);
 539                         log(DEBUG,"Removing dependent commands...");
 540                         Parser->RemoveCommands(filename);
 541                         log(DEFAULT,"Module %s unloaded",filename);
 542                         MODCOUNT--;
 543                         BuildISupport();
 544                         return true;
 545                 }
 546         }
 547         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 548         snprintf(MODERR,MAXBUF,"Module not loaded");
 549         return false;
 550 }
 551
 552 bool InspIRCd::LoadModule(const char* filename)
 553 {
 554         char modfile[MAXBUF];
 555 #ifdef STATIC_LINK
 556         strlcpy(modfile,filename,MAXBUF);
 557 #else
 558         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 559 #endif
 560         std::string filename_str = filename;
 561 #ifndef STATIC_LINK
 562 #ifndef IS_CYGWIN
 563         if (!DirValid(modfile))
 564         {
 565                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 566                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 567                 return false;
 568         }
 569 #endif
 570 #endif
 571         log(DEBUG,"Loading module: %s",modfile);
 572 #ifndef STATIC_LINK
 573         if (FileExists(modfile))
 574         {
 575 #endif
 576                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 577                 {
 578                         if (Config->module_names[j] == filename_str)
 579                         {
 580                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 581                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 582                                 return false;
 583                         }
 584                 }
 585                 ircd_module* a = new ircd_module(modfile);
 586                 factory[MODCOUNT+1] = a;
 587                 if (factory[MODCOUNT+1]->LastError())
 588                 {
 589                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 590                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 591                         return false;
 592                 }
 593                 try
 594                 {
 595                         if (factory[MODCOUNT+1]->factory)
 596                         {
 597                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 598                                 modules[MODCOUNT+1] = m;
 599                                 /* save the module and the module's classfactory, if
 600                                  * this isnt done, random crashes can occur :/ */
 601                                 Config->module_names.push_back(filename);
 602
 603                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 604                                 for(int t = 0; t < 255; t++)
 605                                         x[t] = 0;
 606
 607                                 modules[MODCOUNT+1]->Implements(x);
 608
 609                                 for(int t = 0; t < 255; t++)
 610                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 611                         }
 612                         else
 613                         {
 614                                 log(DEFAULT,"Unable to load %s",modfile);
 615                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 616                                 return false;
 617                         }
 618                 }
 619                 catch (ModuleException& modexcept)
 620                 {
 621                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 622                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 623                         return false;
 624                 }
 625 #ifndef STATIC_LINK
 626         }
 627         else
 628         {
 629                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 630                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 631                 return false;
 632         }
 633 #endif
 634         MODCOUNT++;
 635         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 636         // now work out which modules, if any, want to move to the back of the queue,
 637         // and if they do, move them there.
 638         std::vector<std::string> put_to_back;
 639         std::vector<std::string> put_to_front;
 640         std::map<std::string,std::string> put_before;
 641         std::map<std::string,std::string> put_after;
 642         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 643         {
 644                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 645                 {
 646                         put_to_back.push_back(Config->module_names[j]);
 647                 }
 648                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 649                 {
 650                         put_to_front.push_back(Config->module_names[j]);
 651                 }
 652                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 653                 {
 654                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 655                 }
 656                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 657                 {
 658                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 659                 }
 660         }
 661         for (unsigned int j = 0; j < put_to_back.size(); j++)
 662         {
 663                 MoveToLast(put_to_back[j]);
 664         }
 665         for (unsigned int j = 0; j < put_to_front.size(); j++)
 666         {
 667                 MoveToFirst(put_to_front[j]);
 668         }
 669         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 670         {
 671                 MoveBefore(j->first,j->second);
 672         }
 673         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 674         {
 675                 MoveAfter(j->first,j->second);
 676         }
 677         BuildISupport();
 678         return true;
 679 }
 680
 681 void InspIRCd::DoOneIteration(bool process_module_sockets)
 682 {
 683         int activefds[MAX_DESCRIPTORS];
 684         int incomingSockfd;
 685         int in_port;
 686         userrec* cu = NULL;
 687         InspSocket* s = NULL;
 688         InspSocket* s_del = NULL;
 689         unsigned int numberactive;
 690         insp_sockaddr sock_us;     // our port number
 691         socklen_t uslen;         // length of our port number
 692
 693         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 694          * Once per loop iteration is pleanty.
 695          */
 696         OLDTIME = TIME;
 697         TIME = time(NULL);
 698
 699         /* Run background module timers every few seconds
 700          * (the docs say modules shouldnt rely on accurate
 701          * timing using this event, so we dont have to
 702          * time this exactly).
 703          */
 704         if (((TIME % 5) == 0) && (!expire_run))
 705         {
 706                 expire_lines();
 707                 if (process_module_sockets)
 708                 {
 709                         /* Fix by brain - the addition of DoOneIteration means that this
 710                          * can end up getting called recursively in the following pattern:
 711                          *
 712                          * m_spanningtree DoPingChecks
 713                          * (server pings out and is squit)
 714                          * (squit causes call to DoOneIteration)
 715                          * DoOneIteration enters here
 716                          * calls DoBackground timer
 717                          * enters m_spanningtree DoPingChecks... see step 1.
 718                          *
 719                          * This should do the job and fix the bug.
 720                          */
 721                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 722                 }
 723                 TickMissedTimers(TIME);
 724                 expire_run = true;
 725                 return;
 726         }
 727         else if ((TIME % 5) == 1)
 728         {
 729                 expire_run = false;
 730         }
 731
 732         if (iterations++ == 15)
 733         {
 734                 iterations = 0;
 735                 DoBackgroundUserStuff(TIME);
 736         }
 737
 738         /* Once a second, do the background processing */
 739         if (TIME != OLDTIME)
 740         {
 741                 if (TIME < OLDTIME)
 742                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 743                 if ((TIME % 3600) == 0)
 744                 {
 745                         MaintainWhoWas(TIME);
 746                 }
 747         }
 748
 749         /* Process timeouts on module sockets each time around
 750          * the loop. There shouldnt be many module sockets, at
 751          * most, 20 or so, so this won't be much of a performance
 752          * hit at all.
 753          */
 754         if (process_module_sockets)
 755                 DoSocketTimeouts(TIME);
 756
 757         TickTimers(TIME);
 758
 759         /* Call the socket engine to wait on the active
 760          * file descriptors. The socket engine has everything's
 761          * descriptors in its list... dns, modules, users,
 762          * servers... so its nice and easy, just one call.
 763          */
 764         if (!(numberactive = SE->Wait(activefds)))
 765                 return;
 766
 767         /**
 768          * Now process each of the fd's. For users, we have a fast
 769          * lookup table which can find a user by file descriptor, so
 770          * processing them by fd isnt expensive. If we have a lot of
 771          * listening ports or module sockets though, things could get
 772          * ugly.
 773          */
 774         log(DEBUG,"There are %d fd's to process.",numberactive);
 775
 776         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 777         {
 778                 int socket_type = SE->GetType(activefds[activefd]);
 779                 switch (socket_type)
 780                 {
 781                         case X_ESTAB_CLIENT:
 782
 783                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 784                                 cu = fd_ref_table[activefds[activefd]];
 785                                 if (cu)
 786                                         ProcessUser(cu);
 787
 788                         break;
 789
 790                         case X_ESTAB_MODULE:
 791
 792                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 793
 794                                 if (!process_module_sockets)
 795                                         break;
 796
 797                                 /* Process module-owned sockets.
 798                                  * Modules are encouraged to inherit their sockets from
 799                                  * InspSocket so we can process them neatly like this.
 800                                  */
 801                                 s = socket_ref[activefds[activefd]];
 802
 803                                 if ((s) && (!s->Poll()))
 804                                 {
 805                                         log(DEBUG,"Socket poll returned false, close and bail");
 806                                         SE->DelFd(s->GetFd());
 807                                         socket_ref[activefds[activefd]] = NULL;
 808                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 809                                         {
 810                                                 s_del = *a;
 811                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 812                                                 {
 813                                                         module_sockets.erase(a);
 814                                                         break;
 815                                                 }
 816                                         }
 817                                         s->Close();
 818                                         DELETE(s);
 819                                 }
 820                                 else if (!s)
 821                                 {
 822                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 823                                         SE->DelFd(s->GetFd());
 824                                 }
 825                         break;
 826
 827                         case X_ESTAB_DNS:
 828                                 /* When we are using single-threaded dns,
 829                                  * the sockets for dns end up in our mainloop.
 830                                  * When we are using multi-threaded dns,
 831                                  * each thread has its own basic poll() loop
 832                                  * within it, making them 'fire and forget'
 833                                  * and independent of the mainloop.
 834                                  */
 835 #ifndef THREADED_DNS
 836                                 log(DEBUG,"Type: X_ESTAB_DNS: fd=%d",activefds[activefd]);
 837                                 dns_poll(activefds[activefd]);
 838 #endif
 839                         break;
 840
 841                         case X_ESTAB_CLASSDNS:
 842                                 /* Handles instances of the Resolver class,
 843                                  * a simple class extended by modules for
 844                                  * nonblocking resolving of addresses.
 845                                  */
 846
 847                                 dns_deal_with_classes(activefds[activefd]);
 848                         break;
 849
 850                         case X_LISTEN:
 851
 852                                 log(DEBUG,"Type: X_LISTEN_MODULE: fd=%d",activefds[activefd]);
 853
 854                                 /* It's a listener */
 855                                 uslen = sizeof(sock_us);
 856                                 length = sizeof(client);
 857                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 858
 859                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 860                                 {
 861                                         in_port = ntohs(sock_us.sin_port);
 862                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 863                                         /* Years and years ago, we used to resolve here
 864                                          * using gethostbyaddr(). That is sucky and we
 865                                          * don't do that any more...
 866                                          */
 867                                         NonBlocking(incomingSockfd);
 868                                         if (Config->GetIOHook(in_port))
 869                                         {
 870                                                 try
 871                                                 {
 872                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, inet_ntoa(client.sin_addr), in_port);
 873                                                 }
 874                                                 catch (ModuleException& modexcept)
 875                                                 {
 876                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 877                                                 }
 878                                         }
 879                                         stats->statsAccept++;
 880                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 881                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 882                                 }
 883                                 else
 884                                 {
 885                                         log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 886                                         shutdown(incomingSockfd,2);
 887                                         close(incomingSockfd);
 888                                         stats->statsRefused++;
 889                                 }
 890                         break;
 891
 892                         default:
 893                                 /* Something went wrong if we're in here.
 894                                  * In fact, so wrong, im not quite sure
 895                                  * what we would do, so for now, its going
 896                                  * to safely do bugger all.
 897                                  */
 898                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 899                                 SE->DelFd(activefds[activefd]);
 900                         break;
 901                 }
 902         }
 903 }
 904
 905 int InspIRCd::Run()
 906 {
 907         /* Until THIS point, ServerInstance == NULL */
 908
 909         LoadAllModules(this);
 910
 911         /* Just in case no modules were loaded - fix for bug #101 */
 912         this->BuildISupport();
 913
 914         printf("\nInspIRCd is now running!\n");
 915
 916         if (!Config->nofork)
 917         {
 918                 fclose(stdout);
 919                 fclose(stderr);
 920                 fclose(stdin);
 921         }
 922
 923         /* Add the listening sockets used for client inbound connections
 924          * to the socket engine
 925          */
 926         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 927                 SE->AddFd(Config->openSockfd[count],true,X_LISTEN);
 928
 929         this->WritePID(Config->PID);
 930
 931         /* main loop, this never returns */
 932         expire_run = false;
 933         iterations = 0;
 934
 935         while (true)
 936         {
 937                 DoOneIteration(true);
 938         }
 939         /* This is never reached -- we hope! */
 940         return 0;
 941 }
 942
 943 /**********************************************************************************/
 944
 945 /**
 946  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 947  */
 948
 949 int main(int argc, char** argv)
 950 {
 951         /* TEST SUITE FOR TOKENSTREAM
 952          *
 953          * Expected output:
 954          *
 955          * String: 'PRIVMSG #test FOO BAR'
 956          * Token 0 = 'PRIVMSG'
 957          * Token 1 = '#test'
 958          * Token 2 = 'FOO'
 959          * Token 3 = 'BAR'
 960          * String: 'PRIVMSG #test :FOO BAR BAZ'
 961          * Token 0 = 'PRIVMSG'
 962          * Token 1 = '#test'
 963          * Token 2 = 'FOO BAR BAZ'
 964          * String: ':PRIVMSG #test :FOO BAR BAZ'
 965          * Token 0 = ':PRIVMSG'
 966          * String: 'AAAAAAA'
 967          * Token 0 = 'AAAAAAA'
 968          * String: ''
 969          * NumItems = 0
 970          *
 971         std::string a = "PRIVMSG #test FOO BAR";
 972         printf("String: '%s'\n",a.c_str());
 973         irc::tokenstream test(a);
 974         printf("Token 0 = '%s'\n",test.GetToken().c_str());
 975         printf("Token 1 = '%s'\n",test.GetToken().c_str());
 976         printf("Token 2 = '%s'\n",test.GetToken().c_str());
 977         printf("Token 3 = '%s'\n",test.GetToken().c_str());
 978         printf("Token 4 = '%s'\n",test.GetToken().c_str());
 979
 980         std::string b = "PRIVMSG #test :FOO BAR BAZ";
 981         printf("String: '%s'\n",b.c_str());
 982         irc::tokenstream test2(b);
 983         printf("Token 0 = '%s'\n",test2.GetToken().c_str());
 984         printf("Token 1 = '%s'\n",test2.GetToken().c_str());
 985         printf("Token 2 = '%s'\n",test2.GetToken().c_str());
 986         printf("Token 3 = '%s'\n",test2.GetToken().c_str());
 987
 988         std::string c = ":PRIVMSG #test :FOO BAR BAZ";
 989         printf("String: '%s'\n",c.c_str());
 990         irc::tokenstream test3(c);
 991         printf("Token 0 = '%s'\n",test3.GetToken().c_str());
 992
 993         c = "AAAAAAA";
 994         printf("String: '%s'\n",c.c_str());
 995         irc::tokenstream test4(c);
 996         printf("Token 0 = '%s'\n",test4.GetToken().c_str());
 997         printf("Token 1 = '%s'\n",test4.GetToken().c_str());
 998
 999         c = "";
1000         printf("String: '%s'\n",c.c_str());
1001         irc::tokenstream test5(c);
1002         printf("Token 0 = '%s'\n",test5.GetToken().c_str());
1003
1004         exit(0);
1005         */
1006         try
1007         {
1008                 ServerInstance = new InspIRCd(argc, argv);
1009                 ServerInstance->Run();
1010                 DELETE(ServerInstance);
1011         }
1012         catch (std::bad_alloc)
1013         {
1014                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
1015                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
1016                 printf("Out of memory! (got exception std::bad_alloc!");
1017         }
1018         return 0;
1019 }