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 #include "users.h"
  49 #include "ctables.h"
  50 #include "globals.h"
  51 #include "modules.h"
  52 #include "dynamic.h"
  53 #include "wildcard.h"
  54 #include "message.h"
  55 #include "mode.h"
  56 #include "commands.h"
  57 #include "xline.h"
  58 #include "inspstring.h"
  59 #include "helperfuncs.h"
  60 #include "hashcomp.h"
  61 #include "socketengine.h"
  62 #include "inspircd_se_config.h"
  63 #include "userprocess.h"
  64 #include "socket.h"
  65 #include "typedefs.h"
  66 #include "command_parse.h"
  67
  68 InspIRCd* ServerInstance;
  69
  70 extern ModuleList modules;
  71 extern FactoryList factory;
  72
  73 std::vector<InspSocket*> module_sockets;
  74 std::vector<userrec*> local_users;
  75
  76 extern int MODCOUNT;
  77 extern char LOG_FILE[MAXBUF];
  78
  79 int iterations = 0;
  80
  81 insp_sockaddr client, server;
  82 socklen_t length;
  83
  84 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  85 time_t TIME = time(NULL), OLDTIME = time(NULL);
  86
  87 // This table references users by file descriptor.
  88 // its an array to make it VERY fast, as all lookups are referenced
  89 // by an integer, meaning there is no need for a scan/search operation.
  90 userrec* fd_ref_table[MAX_DESCRIPTORS];
  91 Server* MyServer = new Server;
  92 ServerConfig *Config = new ServerConfig;
  93 user_hash clientlist;
  94 chan_hash chanlist;
  95 servernamelist servernames;
  96 char lowermap[255];
  97
  98 void AddServerName(const std::string &servername)
  99 {
 100         log(DEBUG,"Adding server name: %s",servername.c_str());
 101
 102         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
 103                 servernames.push_back(servername); /* Wasn't already there. */
 104 }
 105
 106 const char* FindServerNamePtr(const std::string &servername)
 107 {
 108         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
 109
 110         if(iter == servernames.end())
 111         {
 112                 AddServerName(servername);
 113                 iter = --servernames.end();
 114         }
 115
 116         return iter->c_str();
 117 }
 118
 119 bool FindServerName(const std::string &servername)
 120 {
 121         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 122 }
 123
 124 void Exit(int status)
 125 {
 126         if (Config->log_file)
 127                 fclose(Config->log_file);
 128         send_error("Server shutdown.");
 129         exit (status);
 130 }
 131
 132 void InspIRCd::Start()
 133 {
 134         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 135         printf("(C) ChatSpike Development team.\033[0m\n\n");
 136         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 137         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 138         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 139 }
 140
 141 void Killed(int status)
 142 {
 143         if (Config->log_file)
 144                 fclose(Config->log_file);
 145         send_error("Server terminated.");
 146         exit(status);
 147 }
 148
 149 void Rehash(int status)
 150 {
 151         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 152         fclose(Config->log_file);
 153         OpenLog(NULL,0);
 154         Config->Read(false,NULL);
 155         FOREACH_MOD(I_OnRehash,OnRehash(""));
 156 }
 157
 158 void InspIRCd::SetSignals(bool SEGVHandler)
 159 {
 160         signal (SIGALRM, SIG_IGN);
 161         signal (SIGHUP, Rehash);
 162         signal (SIGPIPE, SIG_IGN);
 163         signal (SIGTERM, Exit);
 164         if (SEGVHandler)
 165                 signal (SIGSEGV, Error);
 166 }
 167
 168 bool InspIRCd::DaemonSeed()
 169 {
 170         int childpid;
 171         if ((childpid = fork ()) < 0)
 172                 return (ERROR);
 173         else if (childpid > 0)
 174         {
 175                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 176                 sleep(6);
 177                 exit (0);
 178         }
 179         setsid ();
 180         umask (007);
 181         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 182
 183         rlimit rl;
 184         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 185         {
 186                 log(DEFAULT,"Failed to getrlimit()!");
 187                 return false;
 188         }
 189         else
 190         {
 191                 rl.rlim_cur = rl.rlim_max;
 192                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 193                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 194         }
 195
 196         return true;
 197 }
 198
 199 void InspIRCd::WritePID(const std::string &filename)
 200 {
 201         std::ofstream outfile(filename.c_str());
 202         if (outfile.is_open())
 203         {
 204                 outfile << getpid();
 205                 outfile.close();
 206         }
 207         else
 208         {
 209                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 210                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 211                 Exit(0);
 212         }
 213 }
 214
 215 std::string InspIRCd::GetRevision()
 216 {
 217         return REVISION;
 218 }
 219
 220 void InspIRCd::MakeLowerMap()
 221 {
 222         // initialize the lowercase mapping table
 223         for (unsigned int cn = 0; cn < 256; cn++)
 224                 lowermap[cn] = cn;
 225         // lowercase the uppercase chars
 226         for (unsigned int cn = 65; cn < 91; cn++)
 227                 lowermap[cn] = tolower(cn);
 228         // now replace the specific chars for scandanavian comparison
 229         lowermap[(unsigned)'['] = '{';
 230         lowermap[(unsigned)']'] = '}';
 231         lowermap[(unsigned)'\\'] = '|';
 232 }
 233
 234 InspIRCd::InspIRCd(int argc, char** argv)
 235 {
 236         bool SEGVHandler = false;
 237
 238         this->Start();
 239         module_sockets.clear();
 240         this->startup_time = time(NULL);
 241         srand(time(NULL));
 242         log(DEBUG,"*** InspIRCd starting up!");
 243         if (!FileExists(CONFIG_FILE))
 244         {
 245                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 246                 log(DEFAULT,"main: no config");
 247                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 248                 Exit(ERROR);
 249         }
 250         *LOG_FILE = 0;
 251         if (argc > 1) {
 252                 for (int i = 1; i < argc; i++)
 253                 {
 254                         if (!strcmp(argv[i],"-nofork"))
 255                         {
 256                                 Config->nofork = true;
 257                         }
 258                         else if(!strcmp(argv[i],"-debug"))
 259                         {
 260                                 Config->forcedebug = true;
 261                         }
 262                         else if(!strcmp(argv[i],"-nolog"))
 263                         {
 264                                 Config->writelog = false;
 265                         }
 266                         else if (!strcmp(argv[i],"-wait"))
 267                         {
 268                                 sleep(6);
 269                         }
 270                         else if (!strcmp(argv[i],"-nolimit"))
 271                         {
 272                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 273                         }
 274                         else if (!strcmp(argv[i],"-notraceback"))
 275                         {
 276                                 SEGVHandler = false;
 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                                 i++;
 291                         }
 292                         else
 293                         {
 294                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 295                                 Exit(ERROR);
 296                         }
 297                 }
 298         }
 299
 300         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 301
 302         this->MakeLowerMap();
 303
 304         OpenLog(argv, argc);
 305         this->stats = new serverstats();
 306         this->Parser = new CommandParser();
 307         Config->ClearStack();
 308         Config->Read(true, NULL);
 309         CheckRoot();
 310         this->ModeGrok = new ModeParser();
 311         AddServerName(Config->ServerName);
 312         CheckDie();
 313         InitializeDisabledCommands(Config->DisabledCommands, this);
 314         stats->BoundPortCount = BindPorts(true);
 315
 316         for(int t = 0; t < 255; t++)
 317                 Config->global_implementation[t] = 0;
 318
 319         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 320
 321         printf("\n");
 322         this->SetSignals(SEGVHandler);
 323         if (!Config->nofork)
 324         {
 325                 if (!this->DaemonSeed())
 326                 {
 327                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 328                         Exit(ERROR);
 329                 }
 330         }
 331
 332         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 333          * initialize the socket engine.
 334          */
 335         SocketEngineFactory* SEF = new SocketEngineFactory();
 336         SE = SEF->Create();
 337         delete SEF;
 338
 339         /* We must load the modules AFTER initializing the socket engine, now */
 340
 341         return;
 342 }
 343
 344 std::string InspIRCd::GetVersionString()
 345 {
 346         char versiondata[MAXBUF];
 347         char dnsengine[] = "singlethread-object";
 348         if (*Config->CustomVersion)
 349         {
 350                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 351         }
 352         else
 353         {
 354                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 355         }
 356         return versiondata;
 357 }
 358
 359 char* InspIRCd::ModuleError()
 360 {
 361         return MODERR;
 362 }
 363
 364 void InspIRCd::EraseFactory(int j)
 365 {
 366         int v = 0;
 367         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 368         {
 369                 if (v == j)
 370                 {
 371                         factory.erase(t);
 372                         factory.push_back(NULL);
 373                         return;
 374                 }
 375                 v++;
 376         }
 377 }
 378
 379 void InspIRCd::EraseModule(int j)
 380 {
 381         int v1 = 0;
 382         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 383         {
 384                 if (v1 == j)
 385                 {
 386                         DELETE(*m);
 387                         modules.erase(m);
 388                         modules.push_back(NULL);
 389                         break;
 390                 }
 391                 v1++;
 392         }
 393         int v2 = 0;
 394         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 395         {
 396                 if (v2 == j)
 397                 {
 398                        Config->module_names.erase(v);
 399                        break;
 400                 }
 401                 v2++;
 402         }
 403
 404 }
 405
 406 void InspIRCd::MoveTo(std::string modulename,int slot)
 407 {
 408         unsigned int v2 = 256;
 409         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 410         {
 411                 if (Config->module_names[v] == modulename)
 412                 {
 413                         // found an instance, swap it with the item at MODCOUNT
 414                         v2 = v;
 415                         break;
 416                 }
 417         }
 418         if ((v2 != (unsigned int)slot) && (v2 < 256))
 419         {
 420                 // Swap the module names over
 421                 Config->module_names[v2] = Config->module_names[slot];
 422                 Config->module_names[slot] = modulename;
 423                 // now swap the module factories
 424                 ircd_module* temp = factory[v2];
 425                 factory[v2] = factory[slot];
 426                 factory[slot] = temp;
 427                 // now swap the module objects
 428                 Module* temp_module = modules[v2];
 429                 modules[v2] = modules[slot];
 430                 modules[slot] = temp_module;
 431                 // now swap the implement lists (we dont
 432                 // need to swap the global or recount it)
 433                 for (int n = 0; n < 255; n++)
 434                 {
 435                         char x = Config->implement_lists[v2][n];
 436                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 437                         Config->implement_lists[slot][n] = x;
 438                 }
 439         }
 440         else
 441         {
 442                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 443         }
 444 }
 445
 446 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 447 {
 448         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 449         {
 450                 if (Config->module_names[v] == after)
 451                 {
 452                         MoveTo(modulename, v);
 453                         return;
 454                 }
 455         }
 456 }
 457
 458 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 459 {
 460         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 461         {
 462                 if (Config->module_names[v] == before)
 463                 {
 464                         if (v > 0)
 465                         {
 466                                 MoveTo(modulename, v-1);
 467                         }
 468                         else
 469                         {
 470                                 MoveTo(modulename, v);
 471                         }
 472                         return;
 473                 }
 474         }
 475 }
 476
 477 void InspIRCd::MoveToFirst(std::string modulename)
 478 {
 479         MoveTo(modulename,0);
 480 }
 481
 482 void InspIRCd::MoveToLast(std::string modulename)
 483 {
 484         MoveTo(modulename,MODCOUNT);
 485 }
 486
 487 void InspIRCd::BuildISupport()
 488 {
 489         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 490         std::stringstream v;
 491         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 492         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 493         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 494         Config->data005 = v.str();
 495         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 496 }
 497
 498 bool InspIRCd::UnloadModule(const char* filename)
 499 {
 500         std::string filename_str = filename;
 501         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 502         {
 503                 if (Config->module_names[j] == filename_str)
 504                 {
 505                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 506                         {
 507                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 508                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 509                                 return false;
 510                         }
 511                         /* Give the module a chance to tidy out all its metadata */
 512                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 513                         {
 514                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 515                         }
 516                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 517                         {
 518                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 519                         }
 520
 521                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 522
 523                         for(int t = 0; t < 255; t++)
 524                         {
 525                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 526                         }
 527
 528                         /* We have to renumber implement_lists after unload because the module numbers change!
 529                          */
 530                         for(int j2 = j; j2 < 254; j2++)
 531                         {
 532                                 for(int t = 0; t < 255; t++)
 533                                 {
 534                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 535                                 }
 536                         }
 537
 538                         // found the module
 539                         log(DEBUG,"Removing dependent commands...");
 540                         Parser->RemoveCommands(filename);
 541                         log(DEBUG,"Deleting module...");
 542                         this->EraseModule(j);
 543                         log(DEBUG,"Erasing module entry...");
 544                         this->EraseFactory(j);
 545                         log(DEFAULT,"Module %s unloaded",filename);
 546                         MODCOUNT--;
 547                         BuildISupport();
 548                         return true;
 549                 }
 550         }
 551         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 552         snprintf(MODERR,MAXBUF,"Module not loaded");
 553         return false;
 554 }
 555
 556 bool InspIRCd::LoadModule(const char* filename)
 557 {
 558         char modfile[MAXBUF];
 559 #ifdef STATIC_LINK
 560         strlcpy(modfile,filename,MAXBUF);
 561 #else
 562         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 563 #endif
 564         std::string filename_str = filename;
 565 #ifndef STATIC_LINK
 566 #ifndef IS_CYGWIN
 567         if (!DirValid(modfile))
 568         {
 569                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 570                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 571                 return false;
 572         }
 573 #endif
 574 #endif
 575         log(DEBUG,"Loading module: %s",modfile);
 576 #ifndef STATIC_LINK
 577         if (FileExists(modfile))
 578         {
 579 #endif
 580                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 581                 {
 582                         if (Config->module_names[j] == filename_str)
 583                         {
 584                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 585                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 586                                 return false;
 587                         }
 588                 }
 589                 ircd_module* a = new ircd_module(modfile);
 590                 factory[MODCOUNT+1] = a;
 591                 if (factory[MODCOUNT+1]->LastError())
 592                 {
 593                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 594                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 595                         return false;
 596                 }
 597                 try
 598                 {
 599                         if (factory[MODCOUNT+1]->factory)
 600                         {
 601                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 602                                 modules[MODCOUNT+1] = m;
 603                                 /* save the module and the module's classfactory, if
 604                                  * this isnt done, random crashes can occur :/ */
 605                                 Config->module_names.push_back(filename);
 606
 607                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 608                                 for(int t = 0; t < 255; t++)
 609                                         x[t] = 0;
 610
 611                                 modules[MODCOUNT+1]->Implements(x);
 612
 613                                 for(int t = 0; t < 255; t++)
 614                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 615                         }
 616                         else
 617                         {
 618                                 log(DEFAULT,"Unable to load %s",modfile);
 619                                 snprintf(MODERR,MAXBUF,"Factory function failed!");
 620                                 return false;
 621                         }
 622                 }
 623                 catch (ModuleException& modexcept)
 624                 {
 625                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 626                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 627                         return false;
 628                 }
 629 #ifndef STATIC_LINK
 630         }
 631         else
 632         {
 633                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 634                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 635                 return false;
 636         }
 637 #endif
 638         MODCOUNT++;
 639         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 640         // now work out which modules, if any, want to move to the back of the queue,
 641         // and if they do, move them there.
 642         std::vector<std::string> put_to_back;
 643         std::vector<std::string> put_to_front;
 644         std::map<std::string,std::string> put_before;
 645         std::map<std::string,std::string> put_after;
 646         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 647         {
 648                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 649                 {
 650                         put_to_back.push_back(Config->module_names[j]);
 651                 }
 652                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 653                 {
 654                         put_to_front.push_back(Config->module_names[j]);
 655                 }
 656                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 657                 {
 658                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 659                 }
 660                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 661                 {
 662                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 663                 }
 664         }
 665         for (unsigned int j = 0; j < put_to_back.size(); j++)
 666         {
 667                 MoveToLast(put_to_back[j]);
 668         }
 669         for (unsigned int j = 0; j < put_to_front.size(); j++)
 670         {
 671                 MoveToFirst(put_to_front[j]);
 672         }
 673         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 674         {
 675                 MoveBefore(j->first,j->second);
 676         }
 677         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 678         {
 679                 MoveAfter(j->first,j->second);
 680         }
 681         BuildISupport();
 682         return true;
 683 }
 684
 685 void InspIRCd::DoOneIteration(bool process_module_sockets)
 686 {
 687         int activefds[MAX_DESCRIPTORS];
 688         int incomingSockfd;
 689         int in_port;
 690         userrec* cu = NULL;
 691         InspSocket* s = NULL;
 692         InspSocket* s_del = NULL;
 693         unsigned int numberactive;
 694         insp_sockaddr sock_us;     // our port number
 695         socklen_t uslen;         // length of our port number
 696
 697         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 698          * Once per loop iteration is pleanty.
 699          */
 700         OLDTIME = TIME;
 701         TIME = time(NULL);
 702
 703         /* Run background module timers every few seconds
 704          * (the docs say modules shouldnt rely on accurate
 705          * timing using this event, so we dont have to
 706          * time this exactly).
 707          */
 708         if (((TIME % 5) == 0) && (!expire_run))
 709         {
 710                 expire_lines();
 711                 if (process_module_sockets)
 712                 {
 713                         /* Fix by brain - the addition of DoOneIteration means that this
 714                          * can end up getting called recursively in the following pattern:
 715                          *
 716                          * m_spanningtree DoPingChecks
 717                          * (server pings out and is squit)
 718                          * (squit causes call to DoOneIteration)
 719                          * DoOneIteration enters here
 720                          * calls DoBackground timer
 721                          * enters m_spanningtree DoPingChecks... see step 1.
 722                          *
 723                          * This should do the job and fix the bug.
 724                          */
 725                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 726                 }
 727                 TickMissedTimers(TIME);
 728                 expire_run = true;
 729                 return;
 730         }
 731         else if ((TIME % 5) == 1)
 732         {
 733                 expire_run = false;
 734         }
 735
 736         if (iterations++ == 15)
 737         {
 738                 iterations = 0;
 739                 DoBackgroundUserStuff(TIME);
 740         }
 741
 742         /* Once a second, do the background processing */
 743         if (TIME != OLDTIME)
 744         {
 745                 if (TIME < OLDTIME)
 746                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 747                 if ((TIME % 3600) == 0)
 748                 {
 749                         MaintainWhoWas(TIME);
 750                 }
 751         }
 752
 753         /* Process timeouts on module sockets each time around
 754          * the loop. There shouldnt be many module sockets, at
 755          * most, 20 or so, so this won't be much of a performance
 756          * hit at all.
 757          */
 758         if (process_module_sockets)
 759                 DoSocketTimeouts(TIME);
 760
 761         TickTimers(TIME);
 762
 763         /* Call the socket engine to wait on the active
 764          * file descriptors. The socket engine has everything's
 765          * descriptors in its list... dns, modules, users,
 766          * servers... so its nice and easy, just one call.
 767          */
 768         if (!(numberactive = SE->Wait(activefds)))
 769                 return;
 770
 771         /**
 772          * Now process each of the fd's. For users, we have a fast
 773          * lookup table which can find a user by file descriptor, so
 774          * processing them by fd isnt expensive. If we have a lot of
 775          * listening ports or module sockets though, things could get
 776          * ugly.
 777          */
 778         log(DEBUG,"There are %d fd's to process.",numberactive);
 779
 780         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 781         {
 782                 int socket_type = SE->GetType(activefds[activefd]);
 783                 switch (socket_type)
 784                 {
 785                         case X_ESTAB_CLIENT:
 786
 787                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 788                                 cu = fd_ref_table[activefds[activefd]];
 789                                 if (cu)
 790                                         ProcessUser(cu);
 791
 792                         break;
 793
 794                         case X_ESTAB_MODULE:
 795
 796                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 797
 798                                 if (!process_module_sockets)
 799                                         break;
 800
 801                                 /* Process module-owned sockets.
 802                                  * Modules are encouraged to inherit their sockets from
 803                                  * InspSocket so we can process them neatly like this.
 804                                  */
 805                                 s = socket_ref[activefds[activefd]];
 806
 807                                 if ((s) && (!s->Poll()))
 808                                 {
 809                                         log(DEBUG,"Socket poll returned false, close and bail");
 810                                         SE->DelFd(s->GetFd());
 811                                         socket_ref[activefds[activefd]] = NULL;
 812                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 813                                         {
 814                                                 s_del = *a;
 815                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 816                                                 {
 817                                                         module_sockets.erase(a);
 818                                                         break;
 819                                                 }
 820                                         }
 821                                         s->Close();
 822                                         DELETE(s);
 823                                 }
 824                                 else if (!s)
 825                                 {
 826                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 827                                         SE->DelFd(s->GetFd());
 828                                 }
 829                         break;
 830
 831                         case X_ESTAB_DNS:
 832                                 /* Handles instances of the Resolver class,
 833                                  * a simple class extended by modules and the core for
 834                                  * nonblocking resolving of addresses.
 835                                  */
 836                                 this->Res->MarshallReads(activefds[activefd]);
 837                         break;
 838
 839                         case X_LISTEN:
 840
 841                                 log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 842
 843                                 /* It's a listener */
 844                                 uslen = sizeof(sock_us);
 845                                 length = sizeof(client);
 846                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 847
 848                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 849                                 {
 850 #ifdef IPV6
 851                                         in_port = ntohs(sock_us.sin6_port);
 852 #else
 853                                         in_port = ntohs(sock_us.sin_port);
 854 #endif
 855                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 856                                         /* Years and years ago, we used to resolve here
 857                                          * using gethostbyaddr(). That is sucky and we
 858                                          * don't do that any more...
 859                                          */
 860                                         NonBlocking(incomingSockfd);
 861                                         if (Config->GetIOHook(in_port))
 862                                         {
 863                                                 try
 864                                                 {
 865 #ifdef IPV6
 866                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 867 #else
 868                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 869 #endif
 870                                                 }
 871                                                 catch (ModuleException& modexcept)
 872                                                 {
 873                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 874                                                 }
 875                                         }
 876                                         stats->statsAccept++;
 877 #ifdef IPV6
 878                                         log(DEBUG,"Add ipv6 client");
 879                                         AddClient(incomingSockfd, in_port, false, client.sin6_addr);
 880 #else
 881                                         log(DEBUG,"Add ipv4 client");
 882                                         AddClient(incomingSockfd, in_port, false, client.sin_addr);
 883 #endif
 884                                         log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 885                                 }
 886                                 else
 887                                 {
 888                                         log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 889                                         shutdown(incomingSockfd,2);
 890                                         close(incomingSockfd);
 891                                         stats->statsRefused++;
 892                                 }
 893                         break;
 894
 895                         default:
 896                                 /* Something went wrong if we're in here.
 897                                  * In fact, so wrong, im not quite sure
 898                                  * what we would do, so for now, its going
 899                                  * to safely do bugger all.
 900                                  */
 901                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 902                                 SE->DelFd(activefds[activefd]);
 903                         break;
 904                 }
 905         }
 906 }
 907
 908 int InspIRCd::Run()
 909 {
 910         /* Until THIS point, ServerInstance == NULL */
 911
 912         this->Res = new DNS();
 913
 914         LoadAllModules(this);
 915
 916         /* Just in case no modules were loaded - fix for bug #101 */
 917         this->BuildISupport();
 918
 919         printf("\nInspIRCd is now running!\n");
 920
 921         if (!Config->nofork)
 922         {
 923                 fclose(stdout);
 924                 fclose(stderr);
 925                 fclose(stdin);
 926         }
 927
 928         /* Add the listening sockets used for client inbound connections
 929          * to the socket engine
 930          */
 931         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 932                 SE->AddFd(Config->openSockfd[count],true,X_LISTEN);
 933
 934         this->WritePID(Config->PID);
 935
 936         /* main loop, this never returns */
 937         expire_run = false;
 938         iterations = 0;
 939
 940         while (true)
 941         {
 942                 DoOneIteration(true);
 943         }
 944         /* This is never reached -- we hope! */
 945         return 0;
 946 }
 947
 948 /**********************************************************************************/
 949
 950 /**
 951  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 952  */
 953
 954 int main(int argc, char** argv)
 955 {
 956         /* This is a MatchCIDR() test suite -
 957         printf("Should be 0: %d\n",MatchCIDR("127.0.0.1","1.2.3.4/8"));
 958         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/8"));
 959         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/18"));
 960         printf("Should be 0: %d\n",MatchCIDR("3ffe::0","2fc9::0/16"));
 961         printf("Should be 1: %d\n",MatchCIDR("3ffe:1:3::0", "3ffe:1::0/32"));
 962         exit(0); */
 963
 964         try
 965         {
 966                 ServerInstance = new InspIRCd(argc, argv);
 967                 ServerInstance->Run();
 968                 DELETE(ServerInstance);
 969         }
 970         catch (std::bad_alloc)
 971         {
 972                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
 973                 send_error("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 974                 printf("Out of memory! (got exception std::bad_alloc!");
 975         }
 976         return 0;
 977 }