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 extern int MODCOUNT;
  74 extern char LOG_FILE[MAXBUF];
  75
  76 int iterations = 0;
  77
  78 insp_sockaddr client, server;
  79 socklen_t length;
  80
  81 time_t TIME = time(NULL), OLDTIME = time(NULL);
  82
  83 Server* MyServer = new Server;
  84 char lowermap[255];
  85
  86 void InspIRCd::AddServerName(const std::string &servername)
  87 {
  88         log(DEBUG,"Adding server name: %s",servername.c_str());
  89
  90         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  91                 servernames.push_back(servername); /* Wasn't already there. */
  92 }
  93
  94 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  95 {
  96         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  97
  98         if(iter == servernames.end())
  99         {
 100                 AddServerName(servername);
 101                 iter = --servernames.end();
 102         }
 103
 104         return iter->c_str();
 105 }
 106
 107 bool InspIRCd::FindServerName(const std::string &servername)
 108 {
 109         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 110 }
 111
 112 void Exit(int status)
 113 {
 114         if (ServerInstance->Config->log_file)
 115                 fclose(ServerInstance->Config->log_file);
 116         ServerInstance->SendError("Server shutdown.");
 117         exit (status);
 118 }
 119
 120 void InspIRCd::Start()
 121 {
 122         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 123         printf("(C) ChatSpike Development team.\033[0m\n\n");
 124         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 125         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 126         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 127 }
 128
 129 void Killed(int status)
 130 {
 131         if (ServerInstance->Config->log_file)
 132                 fclose(ServerInstance->Config->log_file);
 133         ServerInstance->SendError("Server terminated.");
 134         exit(status);
 135 }
 136
 137 void Rehash(int status)
 138 {
 139         WriteOpers("Rehashing config file %s due to SIGHUP",CleanFilename(CONFIG_FILE));
 140         fclose(ServerInstance->Config->log_file);
 141         OpenLog(NULL,0);
 142         ServerInstance->Config->Read(false,NULL);
 143         FOREACH_MOD(I_OnRehash,OnRehash(""));
 144 }
 145
 146 void InspIRCd::SetSignals(bool SEGVHandler)
 147 {
 148         signal (SIGALRM, SIG_IGN);
 149         signal (SIGHUP, Rehash);
 150         signal (SIGPIPE, SIG_IGN);
 151         signal (SIGTERM, Exit);
 152         if (SEGVHandler)
 153                 signal (SIGSEGV, Error);
 154 }
 155
 156 bool InspIRCd::DaemonSeed()
 157 {
 158         int childpid;
 159         if ((childpid = fork ()) < 0)
 160                 return (ERROR);
 161         else if (childpid > 0)
 162         {
 163                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 164                 sleep(6);
 165                 exit (0);
 166         }
 167         setsid ();
 168         umask (007);
 169         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 170
 171         rlimit rl;
 172         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 173         {
 174                 log(DEFAULT,"Failed to getrlimit()!");
 175                 return false;
 176         }
 177         else
 178         {
 179                 rl.rlim_cur = rl.rlim_max;
 180                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 181                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 182         }
 183
 184         return true;
 185 }
 186
 187 void InspIRCd::WritePID(const std::string &filename)
 188 {
 189         std::ofstream outfile(filename.c_str());
 190         if (outfile.is_open())
 191         {
 192                 outfile << getpid();
 193                 outfile.close();
 194         }
 195         else
 196         {
 197                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 198                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 199                 Exit(0);
 200         }
 201 }
 202
 203 std::string InspIRCd::GetRevision()
 204 {
 205         return REVISION;
 206 }
 207
 208 void InspIRCd::MakeLowerMap()
 209 {
 210         // initialize the lowercase mapping table
 211         for (unsigned int cn = 0; cn < 256; cn++)
 212                 lowermap[cn] = cn;
 213         // lowercase the uppercase chars
 214         for (unsigned int cn = 65; cn < 91; cn++)
 215                 lowermap[cn] = tolower(cn);
 216         // now replace the specific chars for scandanavian comparison
 217         lowermap[(unsigned)'['] = '{';
 218         lowermap[(unsigned)']'] = '}';
 219         lowermap[(unsigned)'\\'] = '|';
 220 }
 221
 222 InspIRCd::InspIRCd(int argc, char** argv)
 223 {
 224         bool SEGVHandler = false;
 225         this->Config = new ServerConfig;
 226         ServerInstance = this;
 227         this->Start();
 228         this->module_sockets.clear();
 229         this->startup_time = time(NULL);
 230         srand(time(NULL));
 231         log(DEBUG,"*** InspIRCd starting up!");
 232         if (!FileExists(CONFIG_FILE))
 233         {
 234                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 235                 log(DEFAULT,"main: no config");
 236                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 237                 Exit(ERROR);
 238         }
 239         *LOG_FILE = 0;
 240         if (argc > 1) {
 241                 for (int i = 1; i < argc; i++)
 242                 {
 243                         if (!strcmp(argv[i],"-nofork"))
 244                         {
 245                                 Config->nofork = true;
 246                         }
 247                         else if(!strcmp(argv[i],"-debug"))
 248                         {
 249                                 Config->forcedebug = true;
 250                         }
 251                         else if(!strcmp(argv[i],"-nolog"))
 252                         {
 253                                 Config->writelog = false;
 254                         }
 255                         else if (!strcmp(argv[i],"-wait"))
 256                         {
 257                                 sleep(6);
 258                         }
 259                         else if (!strcmp(argv[i],"-nolimit"))
 260                         {
 261                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 262                         }
 263                         else if (!strcmp(argv[i],"-notraceback"))
 264                         {
 265                                 SEGVHandler = false;
 266                         }
 267                         else if (!strcmp(argv[i],"-logfile"))
 268                         {
 269                                 if (argc > i+1)
 270                                 {
 271                                         strlcpy(LOG_FILE,argv[i+1],MAXBUF);
 272                                         printf("LOG: Setting logfile to %s\n",LOG_FILE);
 273                                 }
 274                                 else
 275                                 {
 276                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 277                                         Exit(ERROR);
 278                                 }
 279                                 i++;
 280                         }
 281                         else
 282                         {
 283                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 284                                 Exit(ERROR);
 285                         }
 286                 }
 287         }
 288
 289         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 290
 291         this->MakeLowerMap();
 292
 293         OpenLog(argv, argc);
 294         this->stats = new serverstats();
 295         this->Parser = new CommandParser();
 296         Config->ClearStack();
 297         Config->Read(true, NULL);
 298         CheckRoot();
 299         this->ModeGrok = new ModeParser();
 300         AddServerName(Config->ServerName);
 301         CheckDie();
 302         InitializeDisabledCommands(Config->DisabledCommands, this);
 303         stats->BoundPortCount = BindPorts(true);
 304
 305         for(int t = 0; t < 255; t++)
 306                 Config->global_implementation[t] = 0;
 307
 308         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 309
 310         printf("\n");
 311         this->SetSignals(SEGVHandler);
 312         if (!Config->nofork)
 313         {
 314                 if (!this->DaemonSeed())
 315                 {
 316                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 317                         Exit(ERROR);
 318                 }
 319         }
 320
 321         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 322          * initialize the socket engine.
 323          */
 324         SocketEngineFactory* SEF = new SocketEngineFactory();
 325         SE = SEF->Create();
 326         delete SEF;
 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         char dnsengine[] = "singlethread-object";
 337         if (*Config->CustomVersion)
 338         {
 339                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 340         }
 341         else
 342         {
 343                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 344         }
 345         return versiondata;
 346 }
 347
 348 char* InspIRCd::ModuleError()
 349 {
 350         return MODERR;
 351 }
 352
 353 void InspIRCd::EraseFactory(int j)
 354 {
 355         int v = 0;
 356         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 357         {
 358                 if (v == j)
 359                 {
 360                         factory.erase(t);
 361                         factory.push_back(NULL);
 362                         return;
 363                 }
 364                 v++;
 365         }
 366 }
 367
 368 void InspIRCd::EraseModule(int j)
 369 {
 370         int v1 = 0;
 371         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 372         {
 373                 if (v1 == j)
 374                 {
 375                         DELETE(*m);
 376                         modules.erase(m);
 377                         modules.push_back(NULL);
 378                         break;
 379                 }
 380                 v1++;
 381         }
 382         int v2 = 0;
 383         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 384         {
 385                 if (v2 == j)
 386                 {
 387                        Config->module_names.erase(v);
 388                        break;
 389                 }
 390                 v2++;
 391         }
 392
 393 }
 394
 395 void InspIRCd::MoveTo(std::string modulename,int slot)
 396 {
 397         unsigned int v2 = 256;
 398         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 399         {
 400                 if (Config->module_names[v] == modulename)
 401                 {
 402                         // found an instance, swap it with the item at MODCOUNT
 403                         v2 = v;
 404                         break;
 405                 }
 406         }
 407         if ((v2 != (unsigned int)slot) && (v2 < 256))
 408         {
 409                 // Swap the module names over
 410                 Config->module_names[v2] = Config->module_names[slot];
 411                 Config->module_names[slot] = modulename;
 412                 // now swap the module factories
 413                 ircd_module* temp = factory[v2];
 414                 factory[v2] = factory[slot];
 415                 factory[slot] = temp;
 416                 // now swap the module objects
 417                 Module* temp_module = modules[v2];
 418                 modules[v2] = modules[slot];
 419                 modules[slot] = temp_module;
 420                 // now swap the implement lists (we dont
 421                 // need to swap the global or recount it)
 422                 for (int n = 0; n < 255; n++)
 423                 {
 424                         char x = Config->implement_lists[v2][n];
 425                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 426                         Config->implement_lists[slot][n] = x;
 427                 }
 428         }
 429         else
 430         {
 431                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 432         }
 433 }
 434
 435 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 436 {
 437         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 438         {
 439                 if (Config->module_names[v] == after)
 440                 {
 441                         MoveTo(modulename, v);
 442                         return;
 443                 }
 444         }
 445 }
 446
 447 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 448 {
 449         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 450         {
 451                 if (Config->module_names[v] == before)
 452                 {
 453                         if (v > 0)
 454                         {
 455                                 MoveTo(modulename, v-1);
 456                         }
 457                         else
 458                         {
 459                                 MoveTo(modulename, v);
 460                         }
 461                         return;
 462                 }
 463         }
 464 }
 465
 466 void InspIRCd::MoveToFirst(std::string modulename)
 467 {
 468         MoveTo(modulename,0);
 469 }
 470
 471 void InspIRCd::MoveToLast(std::string modulename)
 472 {
 473         MoveTo(modulename,MODCOUNT);
 474 }
 475
 476 void InspIRCd::BuildISupport()
 477 {
 478         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 479         std::stringstream v;
 480         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 481         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 482         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 483         Config->data005 = v.str();
 484         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 485 }
 486
 487 bool InspIRCd::UnloadModule(const char* filename)
 488 {
 489         std::string filename_str = filename;
 490         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 491         {
 492                 if (Config->module_names[j] == filename_str)
 493                 {
 494                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 495                         {
 496                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 497                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 498                                 return false;
 499                         }
 500                         /* Give the module a chance to tidy out all its metadata */
 501                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 502                         {
 503                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 504                         }
 505                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 506                         {
 507                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 508                         }
 509
 510                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 511
 512                         for(int t = 0; t < 255; t++)
 513                         {
 514                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 515                         }
 516
 517                         /* We have to renumber implement_lists after unload because the module numbers change!
 518                          */
 519                         for(int j2 = j; j2 < 254; j2++)
 520                         {
 521                                 for(int t = 0; t < 255; t++)
 522                                 {
 523                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 524                                 }
 525                         }
 526
 527                         // found the module
 528                         log(DEBUG,"Removing dependent commands...");
 529                         Parser->RemoveCommands(filename);
 530                         log(DEBUG,"Deleting module...");
 531                         this->EraseModule(j);
 532                         log(DEBUG,"Erasing module entry...");
 533                         this->EraseFactory(j);
 534                         log(DEFAULT,"Module %s unloaded",filename);
 535                         MODCOUNT--;
 536                         BuildISupport();
 537                         return true;
 538                 }
 539         }
 540         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 541         snprintf(MODERR,MAXBUF,"Module not loaded");
 542         return false;
 543 }
 544
 545 bool InspIRCd::LoadModule(const char* filename)
 546 {
 547         char modfile[MAXBUF];
 548 #ifdef STATIC_LINK
 549         strlcpy(modfile,filename,MAXBUF);
 550 #else
 551         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 552 #endif
 553         std::string filename_str = filename;
 554 #ifndef STATIC_LINK
 555 #ifndef IS_CYGWIN
 556         if (!DirValid(modfile))
 557         {
 558                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 559                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 560                 return false;
 561         }
 562 #endif
 563 #endif
 564         log(DEBUG,"Loading module: %s",modfile);
 565 #ifndef STATIC_LINK
 566         if (FileExists(modfile))
 567         {
 568 #endif
 569                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 570                 {
 571                         if (Config->module_names[j] == filename_str)
 572                         {
 573                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 574                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 575                                 return false;
 576                         }
 577                 }
 578                 try
 579                 {
 580                         ircd_module* a = new ircd_module(modfile);
 581                         factory[MODCOUNT+1] = a;
 582                         if (factory[MODCOUNT+1]->LastError())
 583                         {
 584                                 log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 585                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 586                                 return false;
 587                         }
 588                         if ((int)factory[MODCOUNT+1]->factory != -1)
 589                         {
 590                                 Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 591                                 modules[MODCOUNT+1] = m;
 592                                 /* save the module and the module's classfactory, if
 593                                  * this isnt done, random crashes can occur :/ */
 594                                 Config->module_names.push_back(filename);
 595
 596                                 char* x = &Config->implement_lists[MODCOUNT+1][0];
 597                                 for(int t = 0; t < 255; t++)
 598                                         x[t] = 0;
 599
 600                                 modules[MODCOUNT+1]->Implements(x);
 601
 602                                 for(int t = 0; t < 255; t++)
 603                                         Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 604                         }
 605                         else
 606                         {
 607                                 log(DEFAULT,"Unable to load %s",modfile);
 608                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 609                                 return false;
 610                         }
 611                 }
 612                 catch (ModuleException& modexcept)
 613                 {
 614                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 615                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 616                         return false;
 617                 }
 618 #ifndef STATIC_LINK
 619         }
 620         else
 621         {
 622                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 623                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 624                 return false;
 625         }
 626 #endif
 627         MODCOUNT++;
 628         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 629         // now work out which modules, if any, want to move to the back of the queue,
 630         // and if they do, move them there.
 631         std::vector<std::string> put_to_back;
 632         std::vector<std::string> put_to_front;
 633         std::map<std::string,std::string> put_before;
 634         std::map<std::string,std::string> put_after;
 635         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 636         {
 637                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 638                 {
 639                         put_to_back.push_back(Config->module_names[j]);
 640                 }
 641                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 642                 {
 643                         put_to_front.push_back(Config->module_names[j]);
 644                 }
 645                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 646                 {
 647                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 648                 }
 649                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 650                 {
 651                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 652                 }
 653         }
 654         for (unsigned int j = 0; j < put_to_back.size(); j++)
 655         {
 656                 MoveToLast(put_to_back[j]);
 657         }
 658         for (unsigned int j = 0; j < put_to_front.size(); j++)
 659         {
 660                 MoveToFirst(put_to_front[j]);
 661         }
 662         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 663         {
 664                 MoveBefore(j->first,j->second);
 665         }
 666         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 667         {
 668                 MoveAfter(j->first,j->second);
 669         }
 670         BuildISupport();
 671         return true;
 672 }
 673
 674 void InspIRCd::DoOneIteration(bool process_module_sockets)
 675 {
 676         int activefds[MAX_DESCRIPTORS];
 677         int incomingSockfd;
 678         int in_port;
 679         userrec* cu = NULL;
 680         InspSocket* s = NULL;
 681         InspSocket* s_del = NULL;
 682         unsigned int numberactive;
 683         insp_sockaddr sock_us;     // our port number
 684         socklen_t uslen;         // length of our port number
 685
 686         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 687          * Once per loop iteration is pleanty.
 688          */
 689         OLDTIME = TIME;
 690         TIME = time(NULL);
 691
 692         /* Run background module timers every few seconds
 693          * (the docs say modules shouldnt rely on accurate
 694          * timing using this event, so we dont have to
 695          * time this exactly).
 696          */
 697         if (((TIME % 5) == 0) && (!expire_run))
 698         {
 699                 expire_lines();
 700                 if (process_module_sockets)
 701                 {
 702                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 703                 }
 704                 TickMissedTimers(TIME);
 705                 expire_run = true;
 706                 return;
 707         }
 708         else if ((TIME % 5) == 1)
 709         {
 710                 expire_run = false;
 711         }
 712
 713         if (iterations++ == 15)
 714         {
 715                 iterations = 0;
 716                 this->DoBackgroundUserStuff(TIME);
 717         }
 718
 719         /* Once a second, do the background processing */
 720         if (TIME != OLDTIME)
 721         {
 722                 if (TIME < OLDTIME)
 723                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 724                 if ((TIME % 3600) == 0)
 725                 {
 726                         irc::whowas::MaintainWhoWas(TIME);
 727                 }
 728         }
 729
 730         /* Process timeouts on module sockets each time around
 731          * the loop. There shouldnt be many module sockets, at
 732          * most, 20 or so, so this won't be much of a performance
 733          * hit at all.
 734          */
 735         if (process_module_sockets)
 736                 this->DoSocketTimeouts(TIME);
 737
 738         TickTimers(TIME);
 739
 740         /* Call the socket engine to wait on the active
 741          * file descriptors. The socket engine has everything's
 742          * descriptors in its list... dns, modules, users,
 743          * servers... so its nice and easy, just one call.
 744          */
 745         if (!(numberactive = SE->Wait(activefds)))
 746                 return;
 747
 748         /**
 749          * Now process each of the fd's. For users, we have a fast
 750          * lookup table which can find a user by file descriptor, so
 751          * processing them by fd isnt expensive. If we have a lot of
 752          * listening ports or module sockets though, things could get
 753          * ugly.
 754          */
 755         log(DEBUG,"There are %d fd's to process.",numberactive);
 756
 757         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 758         {
 759                 int socket_type = SE->GetType(activefds[activefd]);
 760                 switch (socket_type)
 761                 {
 762                         case X_ESTAB_CLIENT:
 763
 764                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 765                                 cu = this->fd_ref_table[activefds[activefd]];
 766                                 if (cu)
 767                                         this->ProcessUser(cu);
 768
 769                         break;
 770
 771                         case X_ESTAB_MODULE:
 772
 773                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 774
 775                                 if (!process_module_sockets)
 776                                         break;
 777
 778                                 /* Process module-owned sockets.
 779                                  * Modules are encouraged to inherit their sockets from
 780                                  * InspSocket so we can process them neatly like this.
 781                                  */
 782                                 s = this->socket_ref[activefds[activefd]];
 783
 784                                 if ((s) && (!s->Poll()))
 785                                 {
 786                                         log(DEBUG,"Socket poll returned false, close and bail");
 787                                         SE->DelFd(s->GetFd());
 788                                         this->socket_ref[activefds[activefd]] = NULL;
 789                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 790                                         {
 791                                                 s_del = *a;
 792                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 793                                                 {
 794                                                         module_sockets.erase(a);
 795                                                         break;
 796                                                 }
 797                                         }
 798                                         s->Close();
 799                                         DELETE(s);
 800                                 }
 801                                 else if (!s)
 802                                 {
 803                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 804                                         SE->DelFd(s->GetFd());
 805                                 }
 806                         break;
 807
 808                         case X_ESTAB_DNS:
 809                                 /* Handles instances of the Resolver class,
 810                                  * a simple class extended by modules and the core for
 811                                  * nonblocking resolving of addresses.
 812                                  */
 813                                 this->Res->MarshallReads(activefds[activefd]);
 814                         break;
 815
 816                         case X_LISTEN:
 817
 818                                 log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 819
 820                                 /* It's a listener */
 821                                 uslen = sizeof(sock_us);
 822                                 length = sizeof(client);
 823                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 824
 825                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 826                                 {
 827 #ifdef IPV6
 828                                         in_port = ntohs(sock_us.sin6_port);
 829 #else
 830                                         in_port = ntohs(sock_us.sin_port);
 831 #endif
 832                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 833                                         /* Years and years ago, we used to resolve here
 834                                          * using gethostbyaddr(). That is sucky and we
 835                                          * don't do that any more...
 836                                          */
 837                                         NonBlocking(incomingSockfd);
 838                                         if (Config->GetIOHook(in_port))
 839                                         {
 840                                                 try
 841                                                 {
 842 #ifdef IPV6
 843                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 844 #else
 845                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 846 #endif
 847                                                 }
 848                                                 catch (ModuleException& modexcept)
 849                                                 {
 850                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 851                                                 }
 852                                         }
 853                                         stats->statsAccept++;
 854 #ifdef IPV6
 855                                         log(DEBUG,"Add ipv6 client");
 856                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin6_addr);
 857 #else
 858                                         log(DEBUG,"Add ipv4 client");
 859                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin_addr);
 860 #endif
 861                                         log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 862                                 }
 863                                 else
 864                                 {
 865                                         log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 866                                         shutdown(incomingSockfd,2);
 867                                         close(incomingSockfd);
 868                                         stats->statsRefused++;
 869                                 }
 870                         break;
 871
 872                         default:
 873                                 /* Something went wrong if we're in here.
 874                                  * In fact, so wrong, im not quite sure
 875                                  * what we would do, so for now, its going
 876                                  * to safely do bugger all.
 877                                  */
 878                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 879                                 SE->DelFd(activefds[activefd]);
 880                         break;
 881                 }
 882         }
 883 }
 884
 885 int InspIRCd::Run()
 886 {
 887         this->Res = new DNS(this);
 888
 889         LoadAllModules(this);
 890
 891         /* Just in case no modules were loaded - fix for bug #101 */
 892         this->BuildISupport();
 893
 894         if (!stats->BoundPortCount)
 895         {
 896                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 897                 Exit(ERROR);
 898         }
 899
 900         /* Add the listening sockets used for client inbound connections
 901          * to the socket engine
 902          */
 903         log(DEBUG,"%d listeners",stats->BoundPortCount);
 904         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 905         {
 906                 log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 907                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 908                 {
 909                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 910                         Exit(ERROR);
 911                 }
 912         }
 913
 914         if (!Config->nofork)
 915         {
 916                 fclose(stdout);
 917                 fclose(stderr);
 918                 fclose(stdin);
 919         }
 920
 921         printf("\nInspIRCd is now running!\n");
 922
 923         this->WritePID(Config->PID);
 924
 925         /* main loop, this never returns */
 926         expire_run = false;
 927         iterations = 0;
 928
 929         while (true)
 930         {
 931                 DoOneIteration(true);
 932         }
 933         /* This is never reached -- we hope! */
 934         return 0;
 935 }
 936
 937 /**********************************************************************************/
 938
 939 /**
 940  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 941  */
 942
 943 int main(int argc, char** argv)
 944 {
 945         /* This is a MatchCIDR() test suite -
 946         printf("Should be 0: %d\n",MatchCIDR("127.0.0.1","1.2.3.4/8"));
 947         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/8"));
 948         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/18"));
 949         printf("Should be 0: %d\n",MatchCIDR("3ffe::0","2fc9::0/16"));
 950         printf("Should be 1: %d\n",MatchCIDR("3ffe:1:3::0", "3ffe:1::0/32"));
 951         exit(0); */
 952
 953         try
 954         {
 955                 ServerInstance = new InspIRCd(argc, argv);
 956                 ServerInstance->Run();
 957                 DELETE(ServerInstance);
 958         }
 959         catch (std::bad_alloc)
 960         {
 961                 log(DEFAULT,"You are out of memory! (got exception std::bad_alloc!)");
 962                 ServerInstance->SendError("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
 963                 printf("Out of memory! (got exception std::bad_alloc!");
 964         }
 965         return 0;
 966 }