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