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::BindPorts;
  68 using irc::sockets::NonBlocking;
  69 using irc::sockets::insp_ntoa;
  70 using irc::sockets::insp_inaddr;
  71 using irc::sockets::insp_sockaddr;
  72
  73 InspIRCd* ServerInstance = NULL;
  74
  75 int iterations = 0;
  76
  77 insp_sockaddr client, server;
  78 socklen_t length;
  79
  80 time_t TIME = time(NULL), OLDTIME = time(NULL);
  81
  82 Server* MyServer = new Server;
  83 char lowermap[255];
  84
  85 void InspIRCd::AddServerName(const std::string &servername)
  86 {
  87         log(DEBUG,"Adding server name: %s",servername.c_str());
  88
  89         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  90                 servernames.push_back(servername); /* Wasn't already there. */
  91 }
  92
  93 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  94 {
  95         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  96
  97         if(iter == servernames.end())
  98         {
  99                 AddServerName(servername);
 100                 iter = --servernames.end();
 101         }
 102
 103         return iter->c_str();
 104 }
 105
 106 bool InspIRCd::FindServerName(const std::string &servername)
 107 {
 108         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 109 }
 110
 111 void InspIRCd::Exit(int status)
 112 {
 113         if (ServerInstance->Config->log_file)
 114                 fclose(ServerInstance->Config->log_file);
 115         ServerInstance->SendError("Server shutdown.");
 116         exit (status);
 117 }
 118
 119 void InspIRCd::Start()
 120 {
 121         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 122         printf("(C) ChatSpike Development team.\033[0m\n\n");
 123         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 124         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 125         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 126 }
 127
 128 void InspIRCd::Rehash(int status)
 129 {
 130         ServerInstance->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
 131         fclose(ServerInstance->Config->log_file);
 132         ServerInstance->OpenLog(NULL,0);
 133         ServerInstance->Config->Read(false,NULL);
 134         FOREACH_MOD(I_OnRehash,OnRehash(""));
 135 }
 136
 137 void InspIRCd::SetSignals(bool SEGVHandler)
 138 {
 139         signal (SIGALRM, SIG_IGN);
 140         signal (SIGHUP, InspIRCd::Rehash);
 141         signal (SIGPIPE, SIG_IGN);
 142         signal (SIGTERM, InspIRCd::Exit);
 143         if (SEGVHandler)
 144                 signal (SIGSEGV, InspIRCd::Error);
 145 }
 146
 147 bool InspIRCd::DaemonSeed()
 148 {
 149         int childpid;
 150         if ((childpid = fork ()) < 0)
 151                 return (ERROR);
 152         else if (childpid > 0)
 153         {
 154                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 155                 sleep(6);
 156                 exit (0);
 157         }
 158         setsid ();
 159         umask (007);
 160         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 161
 162         rlimit rl;
 163         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 164         {
 165                 log(DEFAULT,"Failed to getrlimit()!");
 166                 return false;
 167         }
 168         else
 169         {
 170                 rl.rlim_cur = rl.rlim_max;
 171                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 172                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 173         }
 174
 175         return true;
 176 }
 177
 178 void InspIRCd::WritePID(const std::string &filename)
 179 {
 180         std::ofstream outfile(filename.c_str());
 181         if (outfile.is_open())
 182         {
 183                 outfile << getpid();
 184                 outfile.close();
 185         }
 186         else
 187         {
 188                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 189                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 190                 Exit(0);
 191         }
 192 }
 193
 194 std::string InspIRCd::GetRevision()
 195 {
 196         return REVISION;
 197 }
 198
 199 void InspIRCd::MakeLowerMap()
 200 {
 201         // initialize the lowercase mapping table
 202         for (unsigned int cn = 0; cn < 256; cn++)
 203                 lowermap[cn] = cn;
 204         // lowercase the uppercase chars
 205         for (unsigned int cn = 65; cn < 91; cn++)
 206                 lowermap[cn] = tolower(cn);
 207         // now replace the specific chars for scandanavian comparison
 208         lowermap[(unsigned)'['] = '{';
 209         lowermap[(unsigned)']'] = '}';
 210         lowermap[(unsigned)'\\'] = '|';
 211 }
 212
 213 InspIRCd::InspIRCd(int argc, char** argv) : ModCount(-1)
 214 {
 215         bool SEGVHandler = false;
 216         ServerInstance = this;
 217
 218         modules.resize(255);
 219         factory.resize(255);
 220
 221         this->Config = new ServerConfig(this);
 222         this->Start();
 223         this->module_sockets.clear();
 224         this->startup_time = time(NULL);
 225         srand(time(NULL));
 226         log(DEBUG,"*** InspIRCd starting up!");
 227         if (!ServerConfig::FileExists(CONFIG_FILE))
 228         {
 229                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 230                 log(DEFAULT,"main: no config");
 231                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 232                 Exit(ERROR);
 233         }
 234         *this->LogFileName = 0;
 235         if (argc > 1) {
 236                 for (int i = 1; i < argc; i++)
 237                 {
 238                         if (!strcmp(argv[i],"-nofork"))
 239                         {
 240                                 Config->nofork = true;
 241                         }
 242                         else if(!strcmp(argv[i],"-debug"))
 243                         {
 244                                 Config->forcedebug = true;
 245                         }
 246                         else if(!strcmp(argv[i],"-nolog"))
 247                         {
 248                                 Config->writelog = false;
 249                         }
 250                         else if (!strcmp(argv[i],"-wait"))
 251                         {
 252                                 sleep(6);
 253                         }
 254                         else if (!strcmp(argv[i],"-nolimit"))
 255                         {
 256                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 257                         }
 258                         else if (!strcmp(argv[i],"-notraceback"))
 259                         {
 260                                 SEGVHandler = false;
 261                         }
 262                         else if (!strcmp(argv[i],"-logfile"))
 263                         {
 264                                 if (argc > i+1)
 265                                 {
 266                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 267                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 268                                 }
 269                                 else
 270                                 {
 271                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 272                                         Exit(ERROR);
 273                                 }
 274                                 i++;
 275                         }
 276                         else
 277                         {
 278                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 279                                 Exit(ERROR);
 280                         }
 281                 }
 282         }
 283
 284         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 285
 286         this->MakeLowerMap();
 287
 288         OpenLog(argv, argc);
 289         this->stats = new serverstats();
 290         this->Parser = new CommandParser();
 291         this->Timers = new TimerManager();
 292         Config->ClearStack();
 293         Config->Read(true, NULL);
 294         CheckRoot();
 295         this->ModeGrok = new ModeParser();
 296         this->AddServerName(Config->ServerName);
 297         CheckDie();
 298         InitializeDisabledCommands(Config->DisabledCommands, this);
 299         stats->BoundPortCount = BindPorts(true);
 300
 301         for(int t = 0; t < 255; t++)
 302                 Config->global_implementation[t] = 0;
 303
 304         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 305
 306         printf("\n");
 307         this->SetSignals(SEGVHandler);
 308         if (!Config->nofork)
 309         {
 310                 if (!this->DaemonSeed())
 311                 {
 312                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 313                         Exit(ERROR);
 314                 }
 315         }
 316
 317         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 318          * initialize the socket engine.
 319          */
 320         SocketEngineFactory* SEF = new SocketEngineFactory();
 321         SE = SEF->Create();
 322         delete SEF;
 323
 324         /* We must load the modules AFTER initializing the socket engine, now */
 325
 326         return;
 327 }
 328
 329 std::string InspIRCd::GetVersionString()
 330 {
 331         char versiondata[MAXBUF];
 332         char dnsengine[] = "singlethread-object";
 333         if (*Config->CustomVersion)
 334         {
 335                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 336         }
 337         else
 338         {
 339                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 340         }
 341         return versiondata;
 342 }
 343
 344 char* InspIRCd::ModuleError()
 345 {
 346         return MODERR;
 347 }
 348
 349 void InspIRCd::EraseFactory(int j)
 350 {
 351         int v = 0;
 352         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 353         {
 354                 if (v == j)
 355                 {
 356                         factory.erase(t);
 357                         factory.push_back(NULL);
 358                         return;
 359                 }
 360                 v++;
 361         }
 362 }
 363
 364 void InspIRCd::EraseModule(int j)
 365 {
 366         int v1 = 0;
 367         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 368         {
 369                 if (v1 == j)
 370                 {
 371                         DELETE(*m);
 372                         modules.erase(m);
 373                         modules.push_back(NULL);
 374                         break;
 375                 }
 376                 v1++;
 377         }
 378         int v2 = 0;
 379         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 380         {
 381                 if (v2 == j)
 382                 {
 383                        Config->module_names.erase(v);
 384                        break;
 385                 }
 386                 v2++;
 387         }
 388
 389 }
 390
 391 void InspIRCd::MoveTo(std::string modulename,int slot)
 392 {
 393         unsigned int v2 = 256;
 394         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 395         {
 396                 if (Config->module_names[v] == modulename)
 397                 {
 398                         // found an instance, swap it with the item at the end
 399                         v2 = v;
 400                         break;
 401                 }
 402         }
 403         if ((v2 != (unsigned int)slot) && (v2 < 256))
 404         {
 405                 // Swap the module names over
 406                 Config->module_names[v2] = Config->module_names[slot];
 407                 Config->module_names[slot] = modulename;
 408                 // now swap the module factories
 409                 ircd_module* temp = factory[v2];
 410                 factory[v2] = factory[slot];
 411                 factory[slot] = temp;
 412                 // now swap the module objects
 413                 Module* temp_module = modules[v2];
 414                 modules[v2] = modules[slot];
 415                 modules[slot] = temp_module;
 416                 // now swap the implement lists (we dont
 417                 // need to swap the global or recount it)
 418                 for (int n = 0; n < 255; n++)
 419                 {
 420                         char x = Config->implement_lists[v2][n];
 421                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 422                         Config->implement_lists[slot][n] = x;
 423                 }
 424         }
 425         else
 426         {
 427                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 428         }
 429 }
 430
 431 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 432 {
 433         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 434         {
 435                 if (Config->module_names[v] == after)
 436                 {
 437                         MoveTo(modulename, v);
 438                         return;
 439                 }
 440         }
 441 }
 442
 443 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 444 {
 445         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 446         {
 447                 if (Config->module_names[v] == before)
 448                 {
 449                         if (v > 0)
 450                         {
 451                                 MoveTo(modulename, v-1);
 452                         }
 453                         else
 454                         {
 455                                 MoveTo(modulename, v);
 456                         }
 457                         return;
 458                 }
 459         }
 460 }
 461
 462 void InspIRCd::MoveToFirst(std::string modulename)
 463 {
 464         MoveTo(modulename,0);
 465 }
 466
 467 void InspIRCd::MoveToLast(std::string modulename)
 468 {
 469         MoveTo(modulename,this->GetModuleCount());
 470 }
 471
 472 void InspIRCd::BuildISupport()
 473 {
 474         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 475         std::stringstream v;
 476         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 477         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 478         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 479         Config->data005 = v.str();
 480         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 481 }
 482
 483 bool InspIRCd::UnloadModule(const char* filename)
 484 {
 485         std::string filename_str = filename;
 486         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 487         {
 488                 if (Config->module_names[j] == filename_str)
 489                 {
 490                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 491                         {
 492                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 493                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 494                                 return false;
 495                         }
 496                         /* Give the module a chance to tidy out all its metadata */
 497                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 498                         {
 499                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 500                         }
 501                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 502                         {
 503                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 504                         }
 505
 506                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 507
 508                         for(int t = 0; t < 255; t++)
 509                         {
 510                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 511                         }
 512
 513                         /* We have to renumber implement_lists after unload because the module numbers change!
 514                          */
 515                         for(int j2 = j; j2 < 254; j2++)
 516                         {
 517                                 for(int t = 0; t < 255; t++)
 518                                 {
 519                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 520                                 }
 521                         }
 522
 523                         // found the module
 524                         log(DEBUG,"Removing dependent commands...");
 525                         Parser->RemoveCommands(filename);
 526                         log(DEBUG,"Deleting module...");
 527                         this->EraseModule(j);
 528                         log(DEBUG,"Erasing module entry...");
 529                         this->EraseFactory(j);
 530                         log(DEFAULT,"Module %s unloaded",filename);
 531                         this->ModCount--;
 532                         BuildISupport();
 533                         return true;
 534                 }
 535         }
 536         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 537         snprintf(MODERR,MAXBUF,"Module not loaded");
 538         return false;
 539 }
 540
 541 bool InspIRCd::LoadModule(const char* filename)
 542 {
 543         char modfile[MAXBUF];
 544 #ifdef STATIC_LINK
 545         strlcpy(modfile,filename,MAXBUF);
 546 #else
 547         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 548 #endif
 549         std::string filename_str = filename;
 550 #ifndef STATIC_LINK
 551 #ifndef IS_CYGWIN
 552         if (!ServerConfig::DirValid(modfile))
 553         {
 554                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 555                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 556                 return false;
 557         }
 558 #endif
 559 #endif
 560         log(DEBUG,"Loading module: %s",modfile);
 561 #ifndef STATIC_LINK
 562         if (ServerConfig::FileExists(modfile))
 563         {
 564 #endif
 565                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 566                 {
 567                         if (Config->module_names[j] == filename_str)
 568                         {
 569                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 570                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 571                                 return false;
 572                         }
 573                 }
 574                 try
 575                 {
 576                         ircd_module* a = new ircd_module(modfile);
 577                         factory[this->ModCount+1] = a;
 578                         if (factory[this->ModCount+1]->LastError())
 579                         {
 580                                 log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 581                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 582                                 return false;
 583                         }
 584                         if ((long)factory[this->ModCount+1]->factory != -1)
 585                         {
 586                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(MyServer);
 587                                 modules[this->ModCount+1] = m;
 588                                 /* save the module and the module's classfactory, if
 589                                  * this isnt done, random crashes can occur :/ */
 590                                 Config->module_names.push_back(filename);
 591
 592                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 593                                 for(int t = 0; t < 255; t++)
 594                                         x[t] = 0;
 595
 596                                 modules[this->ModCount+1]->Implements(x);
 597
 598                                 for(int t = 0; t < 255; t++)
 599                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 600                         }
 601                         else
 602                         {
 603                                 log(DEFAULT,"Unable to load %s",modfile);
 604                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 605                                 return false;
 606                         }
 607                 }
 608                 catch (ModuleException& modexcept)
 609                 {
 610                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 611                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 612                         return false;
 613                 }
 614 #ifndef STATIC_LINK
 615         }
 616         else
 617         {
 618                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 619                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 620                 return false;
 621         }
 622 #endif
 623         this->ModCount++;
 624         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 625         // now work out which modules, if any, want to move to the back of the queue,
 626         // and if they do, move them there.
 627         std::vector<std::string> put_to_back;
 628         std::vector<std::string> put_to_front;
 629         std::map<std::string,std::string> put_before;
 630         std::map<std::string,std::string> put_after;
 631         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 632         {
 633                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 634                 {
 635                         put_to_back.push_back(Config->module_names[j]);
 636                 }
 637                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 638                 {
 639                         put_to_front.push_back(Config->module_names[j]);
 640                 }
 641                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 642                 {
 643                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 644                 }
 645                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 646                 {
 647                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 648                 }
 649         }
 650         for (unsigned int j = 0; j < put_to_back.size(); j++)
 651         {
 652                 MoveToLast(put_to_back[j]);
 653         }
 654         for (unsigned int j = 0; j < put_to_front.size(); j++)
 655         {
 656                 MoveToFirst(put_to_front[j]);
 657         }
 658         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 659         {
 660                 MoveBefore(j->first,j->second);
 661         }
 662         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 663         {
 664                 MoveAfter(j->first,j->second);
 665         }
 666         BuildISupport();
 667         return true;
 668 }
 669
 670 void InspIRCd::DoOneIteration(bool process_module_sockets)
 671 {
 672         int activefds[MAX_DESCRIPTORS];
 673         int incomingSockfd;
 674         int in_port;
 675         userrec* cu = NULL;
 676         InspSocket* s = NULL;
 677         InspSocket* s_del = NULL;
 678         unsigned int numberactive;
 679         insp_sockaddr sock_us;     // our port number
 680         socklen_t uslen;         // length of our port number
 681
 682         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 683          * Once per loop iteration is pleanty.
 684          */
 685         OLDTIME = TIME;
 686         TIME = time(NULL);
 687
 688         /* Run background module timers every few seconds
 689          * (the docs say modules shouldnt rely on accurate
 690          * timing using this event, so we dont have to
 691          * time this exactly).
 692          */
 693         if (((TIME % 5) == 0) && (!expire_run))
 694         {
 695                 expire_lines();
 696                 if (process_module_sockets)
 697                 {
 698                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 699                 }
 700                 Timers->TickMissedTimers(TIME);
 701                 expire_run = true;
 702                 return;
 703         }
 704         else if ((TIME % 5) == 1)
 705         {
 706                 expire_run = false;
 707         }
 708
 709         if (iterations++ == 15)
 710         {
 711                 iterations = 0;
 712                 this->DoBackgroundUserStuff(TIME);
 713         }
 714
 715         /* Once a second, do the background processing */
 716         if (TIME != OLDTIME)
 717         {
 718                 if (TIME < OLDTIME)
 719                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 720                 if ((TIME % 3600) == 0)
 721                 {
 722                         irc::whowas::MaintainWhoWas(TIME);
 723                 }
 724         }
 725
 726         /* Process timeouts on module sockets each time around
 727          * the loop. There shouldnt be many module sockets, at
 728          * most, 20 or so, so this won't be much of a performance
 729          * hit at all.
 730          */
 731         if (process_module_sockets)
 732                 this->DoSocketTimeouts(TIME);
 733
 734         Timers->TickTimers(TIME);
 735
 736         /* Call the socket engine to wait on the active
 737          * file descriptors. The socket engine has everything's
 738          * descriptors in its list... dns, modules, users,
 739          * servers... so its nice and easy, just one call.
 740          */
 741         if (!(numberactive = SE->Wait(activefds)))
 742                 return;
 743
 744         /**
 745          * Now process each of the fd's. For users, we have a fast
 746          * lookup table which can find a user by file descriptor, so
 747          * processing them by fd isnt expensive. If we have a lot of
 748          * listening ports or module sockets though, things could get
 749          * ugly.
 750          */
 751         log(DEBUG,"There are %d fd's to process.",numberactive);
 752
 753         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 754         {
 755                 int socket_type = SE->GetType(activefds[activefd]);
 756                 switch (socket_type)
 757                 {
 758                         case X_ESTAB_CLIENT:
 759
 760                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 761                                 cu = this->fd_ref_table[activefds[activefd]];
 762                                 if (cu)
 763                                         this->ProcessUser(cu);
 764
 765                         break;
 766
 767                         case X_ESTAB_MODULE:
 768
 769                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 770
 771                                 if (!process_module_sockets)
 772                                         break;
 773
 774                                 /* Process module-owned sockets.
 775                                  * Modules are encouraged to inherit their sockets from
 776                                  * InspSocket so we can process them neatly like this.
 777                                  */
 778                                 s = this->socket_ref[activefds[activefd]];
 779
 780                                 if ((s) && (!s->Poll()))
 781                                 {
 782                                         log(DEBUG,"Socket poll returned false, close and bail");
 783                                         SE->DelFd(s->GetFd());
 784                                         this->socket_ref[activefds[activefd]] = NULL;
 785                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 786                                         {
 787                                                 s_del = *a;
 788                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 789                                                 {
 790                                                         module_sockets.erase(a);
 791                                                         break;
 792                                                 }
 793                                         }
 794                                         s->Close();
 795                                         DELETE(s);
 796                                 }
 797                                 else if (!s)
 798                                 {
 799                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 800                                         SE->DelFd(s->GetFd());
 801                                 }
 802                         break;
 803
 804                         case X_ESTAB_DNS:
 805                                 /* Handles instances of the Resolver class,
 806                                  * a simple class extended by modules and the core for
 807                                  * nonblocking resolving of addresses.
 808                                  */
 809                                 this->Res->MarshallReads(activefds[activefd]);
 810                         break;
 811
 812                         case X_LISTEN:
 813
 814                                 log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 815
 816                                 /* It's a listener */
 817                                 uslen = sizeof(sock_us);
 818                                 length = sizeof(client);
 819                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 820
 821                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 822                                 {
 823 #ifdef IPV6
 824                                         in_port = ntohs(sock_us.sin6_port);
 825 #else
 826                                         in_port = ntohs(sock_us.sin_port);
 827 #endif
 828                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 829                                         /* Years and years ago, we used to resolve here
 830                                          * using gethostbyaddr(). That is sucky and we
 831                                          * don't do that any more...
 832                                          */
 833                                         NonBlocking(incomingSockfd);
 834                                         if (Config->GetIOHook(in_port))
 835                                         {
 836                                                 try
 837                                                 {
 838 #ifdef IPV6
 839                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 840 #else
 841                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 842 #endif
 843                                                 }
 844                                                 catch (ModuleException& modexcept)
 845                                                 {
 846                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 847                                                 }
 848                                         }
 849                                         stats->statsAccept++;
 850 #ifdef IPV6
 851                                         log(DEBUG,"Add ipv6 client");
 852                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin6_addr);
 853 #else
 854                                         log(DEBUG,"Add ipv4 client");
 855                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin_addr);
 856 #endif
 857                                         log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 858                                 }
 859                                 else
 860                                 {
 861                                         log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 862                                         shutdown(incomingSockfd,2);
 863                                         close(incomingSockfd);
 864                                         stats->statsRefused++;
 865                                 }
 866                         break;
 867
 868                         default:
 869                                 /* Something went wrong if we're in here.
 870                                  * In fact, so wrong, im not quite sure
 871                                  * what we would do, so for now, its going
 872                                  * to safely do bugger all.
 873                                  */
 874                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 875                                 SE->DelFd(activefds[activefd]);
 876                         break;
 877                 }
 878         }
 879 }
 880
 881 bool InspIRCd::IsIdent(const char* n)
 882 {
 883         if (!n || !*n)
 884                 return false;
 885
 886         for (char* i = (char*)n; *i; i++)
 887         {
 888                 if ((*i >= 'A') && (*i <= '}'))
 889                 {
 890                         continue;
 891                 }
 892                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 893                 {
 894                         continue;
 895                 }
 896                 return false;
 897         }
 898         return true;
 899 }
 900
 901
 902 bool InspIRCd::IsNick(const char* n)
 903 {
 904         if (!n || !*n)
 905                 return false;
 906
 907         int p = 0;
 908         for (char* i = (char*)n; *i; i++, p++)
 909         {
 910                 /* "A"-"}" can occur anywhere in a nickname */
 911                 if ((*i >= 'A') && (*i <= '}'))
 912                 {
 913                         continue;
 914                 }
 915                 /* "0"-"9", "-" can occur anywhere BUT the first char of a nickname */
 916                 if ((((*i >= '0') && (*i <= '9')) || (*i == '-')) && (i > n))
 917                 {
 918                         continue;
 919                 }
 920                 /* invalid character! abort */
 921                 return false;
 922         }
 923         return (p < NICKMAX - 1);
 924 }
 925
 926 int InspIRCd::Run()
 927 {
 928         this->Res = new DNS(this);
 929
 930         log(DEBUG,"RES: %08x",this->Res);
 931
 932         this->LoadAllModules();
 933
 934         /* Just in case no modules were loaded - fix for bug #101 */
 935         this->BuildISupport();
 936
 937         if (!stats->BoundPortCount)
 938         {
 939                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 940                 Exit(ERROR);
 941         }
 942
 943         /* Add the listening sockets used for client inbound connections
 944          * to the socket engine
 945          */
 946         log(DEBUG,"%d listeners",stats->BoundPortCount);
 947         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 948         {
 949                 log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 950                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 951                 {
 952                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 953                         Exit(ERROR);
 954                 }
 955         }
 956
 957         if (!Config->nofork)
 958         {
 959                 fclose(stdout);
 960                 fclose(stderr);
 961                 fclose(stdin);
 962         }
 963
 964         printf("\nInspIRCd is now running!\n");
 965
 966         this->WritePID(Config->PID);
 967
 968         /* main loop, this never returns */
 969         expire_run = false;
 970         iterations = 0;
 971
 972         while (true)
 973         {
 974                 DoOneIteration(true);
 975         }
 976         /* This is never reached -- we hope! */
 977         return 0;
 978 }
 979
 980 /**********************************************************************************/
 981
 982 /**
 983  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 984  */
 985
 986 int main(int argc, char** argv)
 987 {
 988         /* This is a MatchCIDR() test suite -
 989         printf("Should be 0: %d\n",MatchCIDR("127.0.0.1","1.2.3.4/8"));
 990         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/8"));
 991         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/18"));
 992         printf("Should be 0: %d\n",MatchCIDR("3ffe::0","2fc9::0/16"));
 993         printf("Should be 1: %d\n",MatchCIDR("3ffe:1:3::0", "3ffe:1::0/32"));
 994         exit(0); */
 995
 996         try
 997         {
 998                 try
 999                 {
1000                         ServerInstance = new InspIRCd(argc, argv);
1001                         ServerInstance->Run();
1002                         DELETE(ServerInstance);
1003                 }
1004                 catch (std::bad_alloc&)
1005                 {
1006                         log(SPARSE,"You are out of memory! (got exception std::bad_alloc!)");
1007                         ServerInstance->SendError("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
1008                 }
1009         }
1010         catch (...)
1011         {
1012                 log(SPARSE,"Uncaught exception, aborting.");
1013                 ServerInstance->SendError("Server terminating due to uncaught exception.");
1014         }
1015         return 0;
1016 }
1017
1018 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
1019  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
1020  * registration timeout maximum seconds)
1021  */
1022 bool InspIRCd::AllModulesReportReady(userrec* user)
1023 {
1024         if (!Config->global_implementation[I_OnCheckReady])
1025                 return true;
1026
1027         for (int i = 0; i <= this->GetModuleCount(); i++)
1028         {
1029                 if (Config->implement_lists[i][I_OnCheckReady])
1030                 {
1031                         int res = modules[i]->OnCheckReady(user);
1032                         if (!res)
1033                                 return false;
1034                 }
1035         }
1036         return true;
1037 }
1038
1039 int InspIRCd::GetModuleCount()
1040 {
1041         return this->ModCount;
1042 }
1043