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