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 "mode.h"
  55 #include "commands.h"
  56 #include "xline.h"
  57 #include "inspstring.h"
  58 #include "helperfuncs.h"
  59 #include "hashcomp.h"
  60 #include "socketengine.h"
  61 #include "inspircd_se_config.h"
  62 #include "userprocess.h"
  63 #include "socket.h"
  64 #include "typedefs.h"
  65 #include "command_parse.h"
  66
  67 using irc::sockets::NonBlocking;
  68 using irc::sockets::insp_ntoa;
  69 using irc::sockets::insp_inaddr;
  70 using irc::sockets::insp_sockaddr;
  71
  72 InspIRCd* ServerInstance = NULL;
  73
  74 int iterations = 0;
  75
  76 insp_sockaddr client, server;
  77 socklen_t length;
  78
  79 time_t TIME = time(NULL), OLDTIME = time(NULL);
  80
  81 Server* MyServer = new Server;
  82 char lowermap[255];
  83
  84 void InspIRCd::AddServerName(const std::string &servername)
  85 {
  86         log(DEBUG,"Adding server name: %s",servername.c_str());
  87
  88         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  89                 servernames.push_back(servername); /* Wasn't already there. */
  90 }
  91
  92 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  93 {
  94         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  95
  96         if(iter == servernames.end())
  97         {
  98                 AddServerName(servername);
  99                 iter = --servernames.end();
 100         }
 101
 102         return iter->c_str();
 103 }
 104
 105 bool InspIRCd::FindServerName(const std::string &servername)
 106 {
 107         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 108 }
 109
 110 void InspIRCd::Exit(int status)
 111 {
 112         if (ServerInstance->Config->log_file)
 113                 fclose(ServerInstance->Config->log_file);
 114         ServerInstance->SendError("Server shutdown.");
 115         exit (status);
 116 }
 117
 118 void InspIRCd::Start()
 119 {
 120         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 121         printf("(C) ChatSpike Development team.\033[0m\n\n");
 122         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 123         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 124         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 125 }
 126
 127 void InspIRCd::Rehash(int status)
 128 {
 129         ServerInstance->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
 130         fclose(ServerInstance->Config->log_file);
 131         ServerInstance->OpenLog(NULL,0);
 132         ServerInstance->Config->Read(false,NULL);
 133         FOREACH_MOD(I_OnRehash,OnRehash(""));
 134 }
 135
 136 void InspIRCd::SetSignals(bool SEGVHandler)
 137 {
 138         signal (SIGALRM, SIG_IGN);
 139         signal (SIGHUP, InspIRCd::Rehash);
 140         signal (SIGPIPE, SIG_IGN);
 141         signal (SIGTERM, InspIRCd::Exit);
 142         if (SEGVHandler)
 143                 signal (SIGSEGV, InspIRCd::Error);
 144 }
 145
 146 bool InspIRCd::DaemonSeed()
 147 {
 148         int childpid;
 149         if ((childpid = fork ()) < 0)
 150                 return (ERROR);
 151         else if (childpid > 0)
 152         {
 153                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 154                 sleep(6);
 155                 exit (0);
 156         }
 157         setsid ();
 158         umask (007);
 159         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 160
 161         rlimit rl;
 162         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 163         {
 164                 log(DEFAULT,"Failed to getrlimit()!");
 165                 return false;
 166         }
 167         else
 168         {
 169                 rl.rlim_cur = rl.rlim_max;
 170                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 171                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 172         }
 173
 174         return true;
 175 }
 176
 177 void InspIRCd::WritePID(const std::string &filename)
 178 {
 179         std::ofstream outfile(filename.c_str());
 180         if (outfile.is_open())
 181         {
 182                 outfile << getpid();
 183                 outfile.close();
 184         }
 185         else
 186         {
 187                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 188                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 189                 Exit(0);
 190         }
 191 }
 192
 193 std::string InspIRCd::GetRevision()
 194 {
 195         return REVISION;
 196 }
 197
 198 void InspIRCd::MakeLowerMap()
 199 {
 200         // initialize the lowercase mapping table
 201         for (unsigned int cn = 0; cn < 256; cn++)
 202                 lowermap[cn] = cn;
 203         // lowercase the uppercase chars
 204         for (unsigned int cn = 65; cn < 91; cn++)
 205                 lowermap[cn] = tolower(cn);
 206         // now replace the specific chars for scandanavian comparison
 207         lowermap[(unsigned)'['] = '{';
 208         lowermap[(unsigned)']'] = '}';
 209         lowermap[(unsigned)'\\'] = '|';
 210 }
 211
 212 InspIRCd::InspIRCd(int argc, char** argv) : ModCount(-1)
 213 {
 214         bool SEGVHandler = false;
 215         ServerInstance = this;
 216
 217         modules.resize(255);
 218         factory.resize(255);
 219
 220         this->Config = new ServerConfig(this);
 221         this->Start();
 222         this->module_sockets.clear();
 223         this->startup_time = time(NULL);
 224         srand(time(NULL));
 225         log(DEBUG,"*** InspIRCd starting up!");
 226         if (!ServerConfig::FileExists(CONFIG_FILE))
 227         {
 228                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 229                 log(DEFAULT,"main: no config");
 230                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 231                 Exit(ERROR);
 232         }
 233         *this->LogFileName = 0;
 234         if (argc > 1) {
 235                 for (int i = 1; i < argc; i++)
 236                 {
 237                         if (!strcmp(argv[i],"-nofork"))
 238                         {
 239                                 Config->nofork = true;
 240                         }
 241                         else if(!strcmp(argv[i],"-debug"))
 242                         {
 243                                 Config->forcedebug = true;
 244                         }
 245                         else if(!strcmp(argv[i],"-nolog"))
 246                         {
 247                                 Config->writelog = false;
 248                         }
 249                         else if (!strcmp(argv[i],"-wait"))
 250                         {
 251                                 sleep(6);
 252                         }
 253                         else if (!strcmp(argv[i],"-nolimit"))
 254                         {
 255                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 256                         }
 257                         else if (!strcmp(argv[i],"-notraceback"))
 258                         {
 259                                 SEGVHandler = false;
 260                         }
 261                         else if (!strcmp(argv[i],"-logfile"))
 262                         {
 263                                 if (argc > i+1)
 264                                 {
 265                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 266                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 267                                 }
 268                                 else
 269                                 {
 270                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 271                                         Exit(ERROR);
 272                                 }
 273                                 i++;
 274                         }
 275                         else
 276                         {
 277                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 278                                 Exit(ERROR);
 279                         }
 280                 }
 281         }
 282
 283         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 284
 285         this->MakeLowerMap();
 286
 287         OpenLog(argv, argc);
 288         this->stats = new serverstats();
 289         this->Parser = new CommandParser(this);
 290         this->Timers = new TimerManager();
 291         Config->ClearStack();
 292         Config->Read(true, NULL);
 293         CheckRoot();
 294         this->ModeGrok = new ModeParser(this);
 295         this->AddServerName(Config->ServerName);
 296         CheckDie();
 297         InitializeDisabledCommands(Config->DisabledCommands, this);
 298         stats->BoundPortCount = BindPorts(true);
 299
 300         for(int t = 0; t < 255; t++)
 301                 Config->global_implementation[t] = 0;
 302
 303         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 304
 305         printf("\n");
 306         this->SetSignals(SEGVHandler);
 307         if (!Config->nofork)
 308         {
 309                 if (!this->DaemonSeed())
 310                 {
 311                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 312                         Exit(ERROR);
 313                 }
 314         }
 315
 316         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 317          * initialize the socket engine.
 318          */
 319         SocketEngineFactory* SEF = new SocketEngineFactory();
 320         SE = SEF->Create();
 321         delete SEF;
 322
 323         /* We must load the modules AFTER initializing the socket engine, now */
 324
 325         return;
 326 }
 327
 328 std::string InspIRCd::GetVersionString()
 329 {
 330         char versiondata[MAXBUF];
 331         char dnsengine[] = "singlethread-object";
 332         if (*Config->CustomVersion)
 333         {
 334                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 335         }
 336         else
 337         {
 338                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 339         }
 340         return versiondata;
 341 }
 342
 343 char* InspIRCd::ModuleError()
 344 {
 345         return MODERR;
 346 }
 347
 348 void InspIRCd::EraseFactory(int j)
 349 {
 350         int v = 0;
 351         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 352         {
 353                 if (v == j)
 354                 {
 355                         factory.erase(t);
 356                         factory.push_back(NULL);
 357                         return;
 358                 }
 359                 v++;
 360         }
 361 }
 362
 363 void InspIRCd::EraseModule(int j)
 364 {
 365         int v1 = 0;
 366         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 367         {
 368                 if (v1 == j)
 369                 {
 370                         DELETE(*m);
 371                         modules.erase(m);
 372                         modules.push_back(NULL);
 373                         break;
 374                 }
 375                 v1++;
 376         }
 377         int v2 = 0;
 378         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 379         {
 380                 if (v2 == j)
 381                 {
 382                        Config->module_names.erase(v);
 383                        break;
 384                 }
 385                 v2++;
 386         }
 387
 388 }
 389
 390 void InspIRCd::MoveTo(std::string modulename,int slot)
 391 {
 392         unsigned int v2 = 256;
 393         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 394         {
 395                 if (Config->module_names[v] == modulename)
 396                 {
 397                         // found an instance, swap it with the item at the end
 398                         v2 = v;
 399                         break;
 400                 }
 401         }
 402         if ((v2 != (unsigned int)slot) && (v2 < 256))
 403         {
 404                 // Swap the module names over
 405                 Config->module_names[v2] = Config->module_names[slot];
 406                 Config->module_names[slot] = modulename;
 407                 // now swap the module factories
 408                 ircd_module* temp = factory[v2];
 409                 factory[v2] = factory[slot];
 410                 factory[slot] = temp;
 411                 // now swap the module objects
 412                 Module* temp_module = modules[v2];
 413                 modules[v2] = modules[slot];
 414                 modules[slot] = temp_module;
 415                 // now swap the implement lists (we dont
 416                 // need to swap the global or recount it)
 417                 for (int n = 0; n < 255; n++)
 418                 {
 419                         char x = Config->implement_lists[v2][n];
 420                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 421                         Config->implement_lists[slot][n] = x;
 422                 }
 423         }
 424         else
 425         {
 426                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 427         }
 428 }
 429
 430 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 431 {
 432         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 433         {
 434                 if (Config->module_names[v] == after)
 435                 {
 436                         MoveTo(modulename, v);
 437                         return;
 438                 }
 439         }
 440 }
 441
 442 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 443 {
 444         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 445         {
 446                 if (Config->module_names[v] == before)
 447                 {
 448                         if (v > 0)
 449                         {
 450                                 MoveTo(modulename, v-1);
 451                         }
 452                         else
 453                         {
 454                                 MoveTo(modulename, v);
 455                         }
 456                         return;
 457                 }
 458         }
 459 }
 460
 461 void InspIRCd::MoveToFirst(std::string modulename)
 462 {
 463         MoveTo(modulename,0);
 464 }
 465
 466 void InspIRCd::MoveToLast(std::string modulename)
 467 {
 468         MoveTo(modulename,this->GetModuleCount());
 469 }
 470
 471 void InspIRCd::BuildISupport()
 472 {
 473         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 474         std::stringstream v;
 475         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 476         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 477         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 478         Config->data005 = v.str();
 479         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 480 }
 481
 482 bool InspIRCd::UnloadModule(const char* filename)
 483 {
 484         std::string filename_str = filename;
 485         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 486         {
 487                 if (Config->module_names[j] == filename_str)
 488                 {
 489                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 490                         {
 491                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 492                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 493                                 return false;
 494                         }
 495                         /* Give the module a chance to tidy out all its metadata */
 496                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 497                         {
 498                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 499                         }
 500                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 501                         {
 502                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 503                         }
 504
 505                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 506
 507                         for(int t = 0; t < 255; t++)
 508                         {
 509                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 510                         }
 511
 512                         /* We have to renumber implement_lists after unload because the module numbers change!
 513                          */
 514                         for(int j2 = j; j2 < 254; j2++)
 515                         {
 516                                 for(int t = 0; t < 255; t++)
 517                                 {
 518                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 519                                 }
 520                         }
 521
 522                         // found the module
 523                         log(DEBUG,"Removing dependent commands...");
 524                         Parser->RemoveCommands(filename);
 525                         log(DEBUG,"Deleting module...");
 526                         this->EraseModule(j);
 527                         log(DEBUG,"Erasing module entry...");
 528                         this->EraseFactory(j);
 529                         log(DEFAULT,"Module %s unloaded",filename);
 530                         this->ModCount--;
 531                         BuildISupport();
 532                         return true;
 533                 }
 534         }
 535         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 536         snprintf(MODERR,MAXBUF,"Module not loaded");
 537         return false;
 538 }
 539
 540 bool InspIRCd::LoadModule(const char* filename)
 541 {
 542         char modfile[MAXBUF];
 543 #ifdef STATIC_LINK
 544         strlcpy(modfile,filename,MAXBUF);
 545 #else
 546         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 547 #endif
 548         std::string filename_str = filename;
 549 #ifndef STATIC_LINK
 550 #ifndef IS_CYGWIN
 551         if (!ServerConfig::DirValid(modfile))
 552         {
 553                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 554                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 555                 return false;
 556         }
 557 #endif
 558 #endif
 559         log(DEBUG,"Loading module: %s",modfile);
 560 #ifndef STATIC_LINK
 561         if (ServerConfig::FileExists(modfile))
 562         {
 563 #endif
 564                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 565                 {
 566                         if (Config->module_names[j] == filename_str)
 567                         {
 568                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 569                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 570                                 return false;
 571                         }
 572                 }
 573                 try
 574                 {
 575                         ircd_module* a = new ircd_module(this, modfile);
 576                         factory[this->ModCount+1] = a;
 577                         if (factory[this->ModCount+1]->LastError())
 578                         {
 579                                 log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 580                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 581                                 return false;
 582                         }
 583                         if ((long)factory[this->ModCount+1]->factory != -1)
 584                         {
 585                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 586                                 modules[this->ModCount+1] = m;
 587                                 /* save the module and the module's classfactory, if
 588                                  * this isnt done, random crashes can occur :/ */
 589                                 Config->module_names.push_back(filename);
 590
 591                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 592                                 for(int t = 0; t < 255; t++)
 593                                         x[t] = 0;
 594
 595                                 modules[this->ModCount+1]->Implements(x);
 596
 597                                 for(int t = 0; t < 255; t++)
 598                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 599                         }
 600                         else
 601                         {
 602                                 log(DEFAULT,"Unable to load %s",modfile);
 603                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 604                                 return false;
 605                         }
 606                 }
 607                 catch (ModuleException& modexcept)
 608                 {
 609                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 610                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 611                         return false;
 612                 }
 613 #ifndef STATIC_LINK
 614         }
 615         else
 616         {
 617                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 618                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 619                 return false;
 620         }
 621 #endif
 622         this->ModCount++;
 623         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 624         // now work out which modules, if any, want to move to the back of the queue,
 625         // and if they do, move them there.
 626         std::vector<std::string> put_to_back;
 627         std::vector<std::string> put_to_front;
 628         std::map<std::string,std::string> put_before;
 629         std::map<std::string,std::string> put_after;
 630         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 631         {
 632                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 633                 {
 634                         put_to_back.push_back(Config->module_names[j]);
 635                 }
 636                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 637                 {
 638                         put_to_front.push_back(Config->module_names[j]);
 639                 }
 640                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 641                 {
 642                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 643                 }
 644                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 645                 {
 646                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 647                 }
 648         }
 649         for (unsigned int j = 0; j < put_to_back.size(); j++)
 650         {
 651                 MoveToLast(put_to_back[j]);
 652         }
 653         for (unsigned int j = 0; j < put_to_front.size(); j++)
 654         {
 655                 MoveToFirst(put_to_front[j]);
 656         }
 657         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 658         {
 659                 MoveBefore(j->first,j->second);
 660         }
 661         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 662         {
 663                 MoveAfter(j->first,j->second);
 664         }
 665         BuildISupport();
 666         return true;
 667 }
 668
 669 void InspIRCd::DoOneIteration(bool process_module_sockets)
 670 {
 671         int activefds[MAX_DESCRIPTORS];
 672         int incomingSockfd;
 673         int in_port;
 674         userrec* cu = NULL;
 675         InspSocket* s = NULL;
 676         InspSocket* s_del = NULL;
 677         unsigned int numberactive;
 678         insp_sockaddr sock_us;     // our port number
 679         socklen_t uslen;         // length of our port number
 680
 681         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 682          * Once per loop iteration is pleanty.
 683          */
 684         OLDTIME = TIME;
 685         TIME = time(NULL);
 686
 687         /* Run background module timers every few seconds
 688          * (the docs say modules shouldnt rely on accurate
 689          * timing using this event, so we dont have to
 690          * time this exactly).
 691          */
 692         if (((TIME % 5) == 0) && (!expire_run))
 693         {
 694                 expire_lines();
 695                 if (process_module_sockets)
 696                 {
 697                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 698                 }
 699                 Timers->TickMissedTimers(TIME);
 700                 expire_run = true;
 701                 return;
 702         }
 703         else if ((TIME % 5) == 1)
 704         {
 705                 expire_run = false;
 706         }
 707
 708         if (iterations++ == 15)
 709         {
 710                 iterations = 0;
 711                 this->DoBackgroundUserStuff(TIME);
 712         }
 713
 714         /* Once a second, do the background processing */
 715         if (TIME != OLDTIME)
 716         {
 717                 if (TIME < OLDTIME)
 718                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 719                 if ((TIME % 3600) == 0)
 720                 {
 721                         irc::whowas::MaintainWhoWas(TIME);
 722                 }
 723         }
 724
 725         /* Process timeouts on module sockets each time around
 726          * the loop. There shouldnt be many module sockets, at
 727          * most, 20 or so, so this won't be much of a performance
 728          * hit at all.
 729          */
 730         if (process_module_sockets)
 731                 this->DoSocketTimeouts(TIME);
 732
 733         Timers->TickTimers(TIME);
 734
 735         /* Call the socket engine to wait on the active
 736          * file descriptors. The socket engine has everything's
 737          * descriptors in its list... dns, modules, users,
 738          * servers... so its nice and easy, just one call.
 739          */
 740         if (!(numberactive = SE->Wait(activefds)))
 741                 return;
 742
 743         /**
 744          * Now process each of the fd's. For users, we have a fast
 745          * lookup table which can find a user by file descriptor, so
 746          * processing them by fd isnt expensive. If we have a lot of
 747          * listening ports or module sockets though, things could get
 748          * ugly.
 749          */
 750         log(DEBUG,"There are %d fd's to process.",numberactive);
 751
 752         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 753         {
 754                 int socket_type = SE->GetType(activefds[activefd]);
 755                 switch (socket_type)
 756                 {
 757                         case X_ESTAB_CLIENT:
 758
 759                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 760                                 cu = this->fd_ref_table[activefds[activefd]];
 761                                 if (cu)
 762                                         this->ProcessUser(cu);
 763
 764                         break;
 765
 766                         case X_ESTAB_MODULE:
 767
 768                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 769
 770                                 if (!process_module_sockets)
 771                                         break;
 772
 773                                 /* Process module-owned sockets.
 774                                  * Modules are encouraged to inherit their sockets from
 775                                  * InspSocket so we can process them neatly like this.
 776                                  */
 777                                 s = this->socket_ref[activefds[activefd]];
 778
 779                                 if ((s) && (!s->Poll()))
 780                                 {
 781                                         log(DEBUG,"Socket poll returned false, close and bail");
 782                                         SE->DelFd(s->GetFd());
 783                                         this->socket_ref[activefds[activefd]] = NULL;
 784                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 785                                         {
 786                                                 s_del = *a;
 787                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 788                                                 {
 789                                                         module_sockets.erase(a);
 790                                                         break;
 791                                                 }
 792                                         }
 793                                         s->Close();
 794                                         DELETE(s);
 795                                 }
 796                                 else if (!s)
 797                                 {
 798                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 799                                         SE->DelFd(s->GetFd());
 800                                 }
 801                         break;
 802
 803                         case X_ESTAB_DNS:
 804                                 /* Handles instances of the Resolver class,
 805                                  * a simple class extended by modules and the core for
 806                                  * nonblocking resolving of addresses.
 807                                  */
 808                                 this->Res->MarshallReads(activefds[activefd]);
 809                         break;
 810
 811                         case X_LISTEN:
 812
 813                                 log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 814
 815                                 /* It's a listener */
 816                                 uslen = sizeof(sock_us);
 817                                 length = sizeof(client);
 818                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 819
 820                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 821                                 {
 822 #ifdef IPV6
 823                                         in_port = ntohs(sock_us.sin6_port);
 824 #else
 825                                         in_port = ntohs(sock_us.sin_port);
 826 #endif
 827                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 828                                         /* Years and years ago, we used to resolve here
 829                                          * using gethostbyaddr(). That is sucky and we
 830                                          * don't do that any more...
 831                                          */
 832                                         NonBlocking(incomingSockfd);
 833                                         if (Config->GetIOHook(in_port))
 834                                         {
 835                                                 try
 836                                                 {
 837 #ifdef IPV6
 838                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 839 #else
 840                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 841 #endif
 842                                                 }
 843                                                 catch (ModuleException& modexcept)
 844                                                 {
 845                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 846                                                 }
 847                                         }
 848                                         stats->statsAccept++;
 849 #ifdef IPV6
 850                                         log(DEBUG,"Add ipv6 client");
 851                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin6_addr);
 852 #else
 853                                         log(DEBUG,"Add ipv4 client");
 854                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin_addr);
 855 #endif
 856                                         log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 857                                 }
 858                                 else
 859                                 {
 860                                         log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 861                                         shutdown(incomingSockfd,2);
 862                                         close(incomingSockfd);
 863                                         stats->statsRefused++;
 864                                 }
 865                         break;
 866
 867                         default:
 868                                 /* Something went wrong if we're in here.
 869                                  * In fact, so wrong, im not quite sure
 870                                  * what we would do, so for now, its going
 871                                  * to safely do bugger all.
 872                                  */
 873                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 874                                 SE->DelFd(activefds[activefd]);
 875                         break;
 876                 }
 877         }
 878 }
 879
 880 bool InspIRCd::IsIdent(const char* n)
 881 {
 882         if (!n || !*n)
 883                 return false;
 884
 885         for (char* i = (char*)n; *i; i++)
 886         {
 887                 if ((*i >= 'A') && (*i <= '}'))
 888                 {
 889                         continue;
 890                 }
 891                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 892                 {
 893                         continue;
 894                 }
 895                 return false;
 896         }
 897         return true;
 898 }
 899
 900
 901 bool InspIRCd::IsNick(const char* n)
 902 {
 903         if (!n || !*n)
 904                 return false;
 905
 906         int p = 0;
 907         for (char* i = (char*)n; *i; i++, p++)
 908         {
 909                 /* "A"-"}" can occur anywhere in a nickname */
 910                 if ((*i >= 'A') && (*i <= '}'))
 911                 {
 912                         continue;
 913                 }
 914                 /* "0"-"9", "-" can occur anywhere BUT the first char of a nickname */
 915                 if ((((*i >= '0') && (*i <= '9')) || (*i == '-')) && (i > n))
 916                 {
 917                         continue;
 918                 }
 919                 /* invalid character! abort */
 920                 return false;
 921         }
 922         return (p < NICKMAX - 1);
 923 }
 924
 925 int InspIRCd::Run()
 926 {
 927         this->Res = new DNS(this);
 928
 929         log(DEBUG,"RES: %08x",this->Res);
 930
 931         this->LoadAllModules();
 932
 933         /* Just in case no modules were loaded - fix for bug #101 */
 934         this->BuildISupport();
 935
 936         if (!stats->BoundPortCount)
 937         {
 938                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 939                 Exit(ERROR);
 940         }
 941
 942         /* Add the listening sockets used for client inbound connections
 943          * to the socket engine
 944          */
 945         log(DEBUG,"%d listeners",stats->BoundPortCount);
 946         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 947         {
 948                 log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 949                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 950                 {
 951                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 952                         Exit(ERROR);
 953                 }
 954         }
 955
 956         if (!Config->nofork)
 957         {
 958                 fclose(stdout);
 959                 fclose(stderr);
 960                 fclose(stdin);
 961         }
 962
 963         printf("\nInspIRCd is now running!\n");
 964
 965         this->WritePID(Config->PID);
 966
 967         /* main loop, this never returns */
 968         expire_run = false;
 969         iterations = 0;
 970
 971         while (true)
 972         {
 973                 DoOneIteration(true);
 974         }
 975         /* This is never reached -- we hope! */
 976         return 0;
 977 }
 978
 979 /**********************************************************************************/
 980
 981 /**
 982  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 983  */
 984
 985 int main(int argc, char** argv)
 986 {
 987         /* This is a MatchCIDR() test suite -
 988         printf("Should be 0: %d\n",MatchCIDR("127.0.0.1","1.2.3.4/8"));
 989         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/8"));
 990         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/18"));
 991         printf("Should be 0: %d\n",MatchCIDR("3ffe::0","2fc9::0/16"));
 992         printf("Should be 1: %d\n",MatchCIDR("3ffe:1:3::0", "3ffe:1::0/32"));
 993         exit(0); */
 994
 995         try
 996         {
 997                 try
 998                 {
 999                         ServerInstance = new InspIRCd(argc, argv);
1000                         ServerInstance->Run();
1001                         DELETE(ServerInstance);
1002                 }
1003                 catch (std::bad_alloc&)
1004                 {
1005                         log(SPARSE,"You are out of memory! (got exception std::bad_alloc!)");
1006                         ServerInstance->SendError("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
1007                 }
1008         }
1009         catch (...)
1010         {
1011                 log(SPARSE,"Uncaught exception, aborting.");
1012                 ServerInstance->SendError("Server terminating due to uncaught exception.");
1013         }
1014         return 0;
1015 }
1016
1017 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
1018  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
1019  * registration timeout maximum seconds)
1020  */
1021 bool InspIRCd::AllModulesReportReady(userrec* user)
1022 {
1023         if (!Config->global_implementation[I_OnCheckReady])
1024                 return true;
1025
1026         for (int i = 0; i <= this->GetModuleCount(); i++)
1027         {
1028                 if (Config->implement_lists[i][I_OnCheckReady])
1029                 {
1030                         int res = modules[i]->OnCheckReady(user);
1031                         if (!res)
1032                                 return false;
1033                 }
1034         }
1035         return true;
1036 }
1037
1038 int InspIRCd::GetModuleCount()
1039 {
1040         return this->ModCount;
1041 }
1042