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 char lowermap[255];
  80
  81 void InspIRCd::AddServerName(const std::string &servername)
  82 {
  83         log(DEBUG,"Adding server name: %s",servername.c_str());
  84
  85         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  86                 servernames.push_back(servername); /* Wasn't already there. */
  87 }
  88
  89 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  90 {
  91         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  92
  93         if(iter == servernames.end())
  94         {
  95                 AddServerName(servername);
  96                 iter = --servernames.end();
  97         }
  98
  99         return iter->c_str();
 100 }
 101
 102 bool InspIRCd::FindServerName(const std::string &servername)
 103 {
 104         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
 105 }
 106
 107 void InspIRCd::Exit(int status)
 108 {
 109         if (ServerInstance->Config->log_file)
 110                 fclose(ServerInstance->Config->log_file);
 111         ServerInstance->SendError("Server shutdown.");
 112         exit (status);
 113 }
 114
 115 void InspIRCd::Start()
 116 {
 117         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 118         printf("(C) ChatSpike Development team.\033[0m\n\n");
 119         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\033[0m\n");
 120         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 121         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
 122 }
 123
 124 void InspIRCd::Rehash(int status)
 125 {
 126         ServerInstance->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
 127         fclose(ServerInstance->Config->log_file);
 128         ServerInstance->OpenLog(NULL,0);
 129         ServerInstance->Config->Read(false,NULL);
 130         FOREACH_MOD(I_OnRehash,OnRehash(""));
 131 }
 132
 133 void InspIRCd::SetSignals(bool SEGVHandler)
 134 {
 135         signal (SIGALRM, SIG_IGN);
 136         signal (SIGHUP, InspIRCd::Rehash);
 137         signal (SIGPIPE, SIG_IGN);
 138         signal (SIGTERM, InspIRCd::Exit);
 139         if (SEGVHandler)
 140                 signal (SIGSEGV, InspIRCd::Error);
 141 }
 142
 143 bool InspIRCd::DaemonSeed()
 144 {
 145         int childpid;
 146         if ((childpid = fork ()) < 0)
 147                 return (ERROR);
 148         else if (childpid > 0)
 149         {
 150                 /* We wait a few seconds here, so that the shell prompt doesnt come back over the output */
 151                 sleep(6);
 152                 exit (0);
 153         }
 154         setsid ();
 155         umask (007);
 156         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 157
 158         rlimit rl;
 159         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 160         {
 161                 log(DEFAULT,"Failed to getrlimit()!");
 162                 return false;
 163         }
 164         else
 165         {
 166                 rl.rlim_cur = rl.rlim_max;
 167                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 168                         log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 169         }
 170
 171         return true;
 172 }
 173
 174 void InspIRCd::WritePID(const std::string &filename)
 175 {
 176         std::ofstream outfile(filename.c_str());
 177         if (outfile.is_open())
 178         {
 179                 outfile << getpid();
 180                 outfile.close();
 181         }
 182         else
 183         {
 184                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
 185                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
 186                 Exit(0);
 187         }
 188 }
 189
 190 std::string InspIRCd::GetRevision()
 191 {
 192         return REVISION;
 193 }
 194
 195 void InspIRCd::MakeLowerMap()
 196 {
 197         // initialize the lowercase mapping table
 198         for (unsigned int cn = 0; cn < 256; cn++)
 199                 lowermap[cn] = cn;
 200         // lowercase the uppercase chars
 201         for (unsigned int cn = 65; cn < 91; cn++)
 202                 lowermap[cn] = tolower(cn);
 203         // now replace the specific chars for scandanavian comparison
 204         lowermap[(unsigned)'['] = '{';
 205         lowermap[(unsigned)']'] = '}';
 206         lowermap[(unsigned)'\\'] = '|';
 207 }
 208
 209 InspIRCd::InspIRCd(int argc, char** argv) : ModCount(-1)
 210 {
 211         bool SEGVHandler = false;
 212         ServerInstance = this;
 213
 214         modules.resize(255);
 215         factory.resize(255);
 216
 217         this->Config = new ServerConfig(this);
 218         this->Start();
 219         this->module_sockets.clear();
 220         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 221         srand(this->TIME);
 222         log(DEBUG,"*** InspIRCd starting up!");
 223         if (!ServerConfig::FileExists(CONFIG_FILE))
 224         {
 225                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 226                 log(DEFAULT,"main: no config");
 227                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 228                 Exit(ERROR);
 229         }
 230         *this->LogFileName = 0;
 231         if (argc > 1) {
 232                 for (int i = 1; i < argc; i++)
 233                 {
 234                         if (!strcmp(argv[i],"-nofork"))
 235                         {
 236                                 Config->nofork = true;
 237                         }
 238                         else if(!strcmp(argv[i],"-debug"))
 239                         {
 240                                 Config->forcedebug = true;
 241                         }
 242                         else if(!strcmp(argv[i],"-nolog"))
 243                         {
 244                                 Config->writelog = false;
 245                         }
 246                         else if (!strcmp(argv[i],"-wait"))
 247                         {
 248                                 sleep(6);
 249                         }
 250                         else if (!strcmp(argv[i],"-nolimit"))
 251                         {
 252                                 printf("WARNING: The `-nolimit' option is deprecated, and now on by default. This behaviour may change in the future.\n");
 253                         }
 254                         else if (!strcmp(argv[i],"-notraceback"))
 255                         {
 256                                 SEGVHandler = false;
 257                         }
 258                         else if (!strcmp(argv[i],"-logfile"))
 259                         {
 260                                 if (argc > i+1)
 261                                 {
 262                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 263                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 264                                 }
 265                                 else
 266                                 {
 267                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 268                                         Exit(ERROR);
 269                                 }
 270                                 i++;
 271                         }
 272                         else
 273                         {
 274                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-nolimit] [-notraceback] [-logfile <filename>]\n",argv[0]);
 275                                 Exit(ERROR);
 276                         }
 277                 }
 278         }
 279
 280         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 281
 282         this->MakeLowerMap();
 283
 284         OpenLog(argv, argc);
 285         this->stats = new serverstats();
 286         this->Parser = new CommandParser(this);
 287         this->Timers = new TimerManager();
 288         Config->ClearStack();
 289         Config->Read(true, NULL);
 290         CheckRoot();
 291         this->ModeGrok = new ModeParser(this);
 292         this->AddServerName(Config->ServerName);
 293         CheckDie();
 294         InitializeDisabledCommands(Config->DisabledCommands, this);
 295         stats->BoundPortCount = BindPorts(true);
 296
 297         for(int t = 0; t < 255; t++)
 298                 Config->global_implementation[t] = 0;
 299
 300         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 301
 302         printf("\n");
 303         this->SetSignals(SEGVHandler);
 304         if (!Config->nofork)
 305         {
 306                 if (!this->DaemonSeed())
 307                 {
 308                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 309                         Exit(ERROR);
 310                 }
 311         }
 312
 313         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 314          * initialize the socket engine.
 315          */
 316         SocketEngineFactory* SEF = new SocketEngineFactory();
 317         SE = SEF->Create();
 318         delete SEF;
 319
 320         /* We must load the modules AFTER initializing the socket engine, now */
 321
 322         return;
 323 }
 324
 325 std::string InspIRCd::GetVersionString()
 326 {
 327         char versiondata[MAXBUF];
 328         char dnsengine[] = "singlethread-object";
 329         if (*Config->CustomVersion)
 330         {
 331                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 332         }
 333         else
 334         {
 335                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 336         }
 337         return versiondata;
 338 }
 339
 340 char* InspIRCd::ModuleError()
 341 {
 342         return MODERR;
 343 }
 344
 345 void InspIRCd::EraseFactory(int j)
 346 {
 347         int v = 0;
 348         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 349         {
 350                 if (v == j)
 351                 {
 352                         factory.erase(t);
 353                         factory.push_back(NULL);
 354                         return;
 355                 }
 356                 v++;
 357         }
 358 }
 359
 360 void InspIRCd::EraseModule(int j)
 361 {
 362         int v1 = 0;
 363         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 364         {
 365                 if (v1 == j)
 366                 {
 367                         DELETE(*m);
 368                         modules.erase(m);
 369                         modules.push_back(NULL);
 370                         break;
 371                 }
 372                 v1++;
 373         }
 374         int v2 = 0;
 375         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 376         {
 377                 if (v2 == j)
 378                 {
 379                        Config->module_names.erase(v);
 380                        break;
 381                 }
 382                 v2++;
 383         }
 384
 385 }
 386
 387 void InspIRCd::MoveTo(std::string modulename,int slot)
 388 {
 389         unsigned int v2 = 256;
 390         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 391         {
 392                 if (Config->module_names[v] == modulename)
 393                 {
 394                         // found an instance, swap it with the item at the end
 395                         v2 = v;
 396                         break;
 397                 }
 398         }
 399         if ((v2 != (unsigned int)slot) && (v2 < 256))
 400         {
 401                 // Swap the module names over
 402                 Config->module_names[v2] = Config->module_names[slot];
 403                 Config->module_names[slot] = modulename;
 404                 // now swap the module factories
 405                 ircd_module* temp = factory[v2];
 406                 factory[v2] = factory[slot];
 407                 factory[slot] = temp;
 408                 // now swap the module objects
 409                 Module* temp_module = modules[v2];
 410                 modules[v2] = modules[slot];
 411                 modules[slot] = temp_module;
 412                 // now swap the implement lists (we dont
 413                 // need to swap the global or recount it)
 414                 for (int n = 0; n < 255; n++)
 415                 {
 416                         char x = Config->implement_lists[v2][n];
 417                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 418                         Config->implement_lists[slot][n] = x;
 419                 }
 420         }
 421         else
 422         {
 423                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 424         }
 425 }
 426
 427 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 428 {
 429         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 430         {
 431                 if (Config->module_names[v] == after)
 432                 {
 433                         MoveTo(modulename, v);
 434                         return;
 435                 }
 436         }
 437 }
 438
 439 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 440 {
 441         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 442         {
 443                 if (Config->module_names[v] == before)
 444                 {
 445                         if (v > 0)
 446                         {
 447                                 MoveTo(modulename, v-1);
 448                         }
 449                         else
 450                         {
 451                                 MoveTo(modulename, v);
 452                         }
 453                         return;
 454                 }
 455         }
 456 }
 457
 458 void InspIRCd::MoveToFirst(std::string modulename)
 459 {
 460         MoveTo(modulename,0);
 461 }
 462
 463 void InspIRCd::MoveToLast(std::string modulename)
 464 {
 465         MoveTo(modulename,this->GetModuleCount());
 466 }
 467
 468 void InspIRCd::BuildISupport()
 469 {
 470         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 471         std::stringstream v;
 472         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 473         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 474         v << MAXAWAY << " CHANMODES=b,k,l,psmnti FNC NETWORK=" << Config->Network << " MAXPARA=32";
 475         Config->data005 = v.str();
 476         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 477 }
 478
 479 bool InspIRCd::UnloadModule(const char* filename)
 480 {
 481         std::string filename_str = filename;
 482         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 483         {
 484                 if (Config->module_names[j] == filename_str)
 485                 {
 486                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 487                         {
 488                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 489                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 490                                 return false;
 491                         }
 492                         /* Give the module a chance to tidy out all its metadata */
 493                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 494                         {
 495                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 496                         }
 497                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 498                         {
 499                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 500                         }
 501
 502                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 503
 504                         for(int t = 0; t < 255; t++)
 505                         {
 506                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 507                         }
 508
 509                         /* We have to renumber implement_lists after unload because the module numbers change!
 510                          */
 511                         for(int j2 = j; j2 < 254; j2++)
 512                         {
 513                                 for(int t = 0; t < 255; t++)
 514                                 {
 515                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 516                                 }
 517                         }
 518
 519                         // found the module
 520                         log(DEBUG,"Removing dependent commands...");
 521                         Parser->RemoveCommands(filename);
 522                         log(DEBUG,"Deleting module...");
 523                         this->EraseModule(j);
 524                         log(DEBUG,"Erasing module entry...");
 525                         this->EraseFactory(j);
 526                         log(DEFAULT,"Module %s unloaded",filename);
 527                         this->ModCount--;
 528                         BuildISupport();
 529                         return true;
 530                 }
 531         }
 532         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 533         snprintf(MODERR,MAXBUF,"Module not loaded");
 534         return false;
 535 }
 536
 537 bool InspIRCd::LoadModule(const char* filename)
 538 {
 539         char modfile[MAXBUF];
 540 #ifdef STATIC_LINK
 541         strlcpy(modfile,filename,MAXBUF);
 542 #else
 543         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 544 #endif
 545         std::string filename_str = filename;
 546 #ifndef STATIC_LINK
 547 #ifndef IS_CYGWIN
 548         if (!ServerConfig::DirValid(modfile))
 549         {
 550                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 551                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 552                 return false;
 553         }
 554 #endif
 555 #endif
 556         log(DEBUG,"Loading module: %s",modfile);
 557 #ifndef STATIC_LINK
 558         if (ServerConfig::FileExists(modfile))
 559         {
 560 #endif
 561                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 562                 {
 563                         if (Config->module_names[j] == filename_str)
 564                         {
 565                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 566                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 567                                 return false;
 568                         }
 569                 }
 570                 try
 571                 {
 572                         ircd_module* a = new ircd_module(this, modfile);
 573                         factory[this->ModCount+1] = a;
 574                         if (factory[this->ModCount+1]->LastError())
 575                         {
 576                                 log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 577                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 578                                 return false;
 579                         }
 580                         if ((long)factory[this->ModCount+1]->factory != -1)
 581                         {
 582                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 583                                 modules[this->ModCount+1] = m;
 584                                 /* save the module and the module's classfactory, if
 585                                  * this isnt done, random crashes can occur :/ */
 586                                 Config->module_names.push_back(filename);
 587
 588                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 589                                 for(int t = 0; t < 255; t++)
 590                                         x[t] = 0;
 591
 592                                 modules[this->ModCount+1]->Implements(x);
 593
 594                                 for(int t = 0; t < 255; t++)
 595                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 596                         }
 597                         else
 598                         {
 599                                 log(DEFAULT,"Unable to load %s",modfile);
 600                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 601                                 return false;
 602                         }
 603                 }
 604                 catch (ModuleException& modexcept)
 605                 {
 606                         log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 607                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 608                         return false;
 609                 }
 610 #ifndef STATIC_LINK
 611         }
 612         else
 613         {
 614                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 615                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 616                 return false;
 617         }
 618 #endif
 619         this->ModCount++;
 620         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 621         // now work out which modules, if any, want to move to the back of the queue,
 622         // and if they do, move them there.
 623         std::vector<std::string> put_to_back;
 624         std::vector<std::string> put_to_front;
 625         std::map<std::string,std::string> put_before;
 626         std::map<std::string,std::string> put_after;
 627         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 628         {
 629                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 630                 {
 631                         put_to_back.push_back(Config->module_names[j]);
 632                 }
 633                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 634                 {
 635                         put_to_front.push_back(Config->module_names[j]);
 636                 }
 637                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 638                 {
 639                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 640                 }
 641                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 642                 {
 643                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 644                 }
 645         }
 646         for (unsigned int j = 0; j < put_to_back.size(); j++)
 647         {
 648                 MoveToLast(put_to_back[j]);
 649         }
 650         for (unsigned int j = 0; j < put_to_front.size(); j++)
 651         {
 652                 MoveToFirst(put_to_front[j]);
 653         }
 654         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 655         {
 656                 MoveBefore(j->first,j->second);
 657         }
 658         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 659         {
 660                 MoveAfter(j->first,j->second);
 661         }
 662         BuildISupport();
 663         return true;
 664 }
 665
 666 void InspIRCd::DoOneIteration(bool process_module_sockets)
 667 {
 668         int activefds[MAX_DESCRIPTORS];
 669         int incomingSockfd;
 670         int in_port;
 671         userrec* cu = NULL;
 672         InspSocket* s = NULL;
 673         InspSocket* s_del = NULL;
 674         unsigned int numberactive;
 675         insp_sockaddr sock_us;     // our port number
 676         socklen_t uslen;         // length of our port number
 677
 678         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 679          * Once per loop iteration is pleanty.
 680          */
 681         OLDTIME = TIME;
 682         TIME = time(NULL);
 683
 684         /* Run background module timers every few seconds
 685          * (the docs say modules shouldnt rely on accurate
 686          * timing using this event, so we dont have to
 687          * time this exactly).
 688          */
 689         if (((TIME % 5) == 0) && (!expire_run))
 690         {
 691                 expire_lines();
 692                 if (process_module_sockets)
 693                 {
 694                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 695                 }
 696                 Timers->TickMissedTimers(TIME);
 697                 expire_run = true;
 698                 return;
 699         }
 700         else if ((TIME % 5) == 1)
 701         {
 702                 expire_run = false;
 703         }
 704
 705         if (iterations++ == 15)
 706         {
 707                 iterations = 0;
 708                 this->DoBackgroundUserStuff(TIME);
 709         }
 710
 711         /* Once a second, do the background processing */
 712         if (TIME != OLDTIME)
 713         {
 714                 if (TIME < OLDTIME)
 715                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 716                 if ((TIME % 3600) == 0)
 717                 {
 718                         irc::whowas::MaintainWhoWas(TIME);
 719                 }
 720         }
 721
 722         /* Process timeouts on module sockets each time around
 723          * the loop. There shouldnt be many module sockets, at
 724          * most, 20 or so, so this won't be much of a performance
 725          * hit at all.
 726          */
 727         if (process_module_sockets)
 728                 this->DoSocketTimeouts(TIME);
 729
 730         Timers->TickTimers(TIME);
 731
 732         /* Call the socket engine to wait on the active
 733          * file descriptors. The socket engine has everything's
 734          * descriptors in its list... dns, modules, users,
 735          * servers... so its nice and easy, just one call.
 736          */
 737         if (!(numberactive = SE->Wait(activefds)))
 738                 return;
 739
 740         /**
 741          * Now process each of the fd's. For users, we have a fast
 742          * lookup table which can find a user by file descriptor, so
 743          * processing them by fd isnt expensive. If we have a lot of
 744          * listening ports or module sockets though, things could get
 745          * ugly.
 746          */
 747         log(DEBUG,"There are %d fd's to process.",numberactive);
 748
 749         for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 750         {
 751                 int socket_type = SE->GetType(activefds[activefd]);
 752                 switch (socket_type)
 753                 {
 754                         case X_ESTAB_CLIENT:
 755
 756                                 log(DEBUG,"Type: X_ESTAB_CLIENT: fd=%d",activefds[activefd]);
 757                                 cu = this->fd_ref_table[activefds[activefd]];
 758                                 if (cu)
 759                                         this->ProcessUser(cu);
 760
 761                         break;
 762
 763                         case X_ESTAB_MODULE:
 764
 765                                 log(DEBUG,"Type: X_ESTAB_MODULE: fd=%d",activefds[activefd]);
 766
 767                                 if (!process_module_sockets)
 768                                         break;
 769
 770                                 /* Process module-owned sockets.
 771                                  * Modules are encouraged to inherit their sockets from
 772                                  * InspSocket so we can process them neatly like this.
 773                                  */
 774                                 s = this->socket_ref[activefds[activefd]];
 775
 776                                 if ((s) && (!s->Poll()))
 777                                 {
 778                                         log(DEBUG,"Socket poll returned false, close and bail");
 779                                         SE->DelFd(s->GetFd());
 780                                         this->socket_ref[activefds[activefd]] = NULL;
 781                                         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 782                                         {
 783                                                 s_del = *a;
 784                                                 if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 785                                                 {
 786                                                         module_sockets.erase(a);
 787                                                         break;
 788                                                 }
 789                                         }
 790                                         s->Close();
 791                                         DELETE(s);
 792                                 }
 793                                 else if (!s)
 794                                 {
 795                                         log(DEBUG,"WTF, X_ESTAB_MODULE for nonexistent InspSocket, removed!");
 796                                         SE->DelFd(s->GetFd());
 797                                 }
 798                         break;
 799
 800                         case X_ESTAB_DNS:
 801                                 /* Handles instances of the Resolver class,
 802                                  * a simple class extended by modules and the core for
 803                                  * nonblocking resolving of addresses.
 804                                  */
 805                                 this->Res->MarshallReads(activefds[activefd]);
 806                         break;
 807
 808                         case X_LISTEN:
 809
 810                                 log(DEBUG,"Type: X_LISTEN: fd=%d",activefds[activefd]);
 811
 812                                 /* It's a listener */
 813                                 uslen = sizeof(sock_us);
 814                                 length = sizeof(client);
 815                                 incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 816
 817                                 if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 818                                 {
 819 #ifdef IPV6
 820                                         in_port = ntohs(sock_us.sin6_port);
 821 #else
 822                                         in_port = ntohs(sock_us.sin_port);
 823 #endif
 824                                         log(DEBUG,"Accepted socket %d",incomingSockfd);
 825                                         /* Years and years ago, we used to resolve here
 826                                          * using gethostbyaddr(). That is sucky and we
 827                                          * don't do that any more...
 828                                          */
 829                                         NonBlocking(incomingSockfd);
 830                                         if (Config->GetIOHook(in_port))
 831                                         {
 832                                                 try
 833                                                 {
 834 #ifdef IPV6
 835                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin6_addr), in_port);
 836 #else
 837                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, insp_ntoa(client.sin_addr), in_port);
 838 #endif
 839                                                 }
 840                                                 catch (ModuleException& modexcept)
 841                                                 {
 842                                                         log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 843                                                 }
 844                                         }
 845                                         stats->statsAccept++;
 846 #ifdef IPV6
 847                                         log(DEBUG,"Add ipv6 client");
 848                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin6_addr);
 849 #else
 850                                         log(DEBUG,"Add ipv4 client");
 851                                         userrec::AddClient(this, incomingSockfd, in_port, false, client.sin_addr);
 852 #endif
 853                                         log(DEBUG,"Adding client on port %d fd=%d",in_port,incomingSockfd);
 854                                 }
 855                                 else
 856                                 {
 857                                         log(DEBUG,"Accept failed on fd %d: %s",incomingSockfd,strerror(errno));
 858                                         shutdown(incomingSockfd,2);
 859                                         close(incomingSockfd);
 860                                         stats->statsRefused++;
 861                                 }
 862                         break;
 863
 864                         default:
 865                                 /* Something went wrong if we're in here.
 866                                  * In fact, so wrong, im not quite sure
 867                                  * what we would do, so for now, its going
 868                                  * to safely do bugger all.
 869                                  */
 870                                 log(DEBUG,"Type: X_WHAT_THE_FUCK_BBQ: fd=%d",activefds[activefd]);
 871                                 SE->DelFd(activefds[activefd]);
 872                         break;
 873                 }
 874         }
 875 }
 876
 877 bool InspIRCd::IsIdent(const char* n)
 878 {
 879         if (!n || !*n)
 880                 return false;
 881
 882         for (char* i = (char*)n; *i; i++)
 883         {
 884                 if ((*i >= 'A') && (*i <= '}'))
 885                 {
 886                         continue;
 887                 }
 888                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 889                 {
 890                         continue;
 891                 }
 892                 return false;
 893         }
 894         return true;
 895 }
 896
 897
 898 bool InspIRCd::IsNick(const char* n)
 899 {
 900         if (!n || !*n)
 901                 return false;
 902
 903         int p = 0;
 904         for (char* i = (char*)n; *i; i++, p++)
 905         {
 906                 /* "A"-"}" can occur anywhere in a nickname */
 907                 if ((*i >= 'A') && (*i <= '}'))
 908                 {
 909                         continue;
 910                 }
 911                 /* "0"-"9", "-" can occur anywhere BUT the first char of a nickname */
 912                 if ((((*i >= '0') && (*i <= '9')) || (*i == '-')) && (i > n))
 913                 {
 914                         continue;
 915                 }
 916                 /* invalid character! abort */
 917                 return false;
 918         }
 919         return (p < NICKMAX - 1);
 920 }
 921
 922 int InspIRCd::Run()
 923 {
 924         this->Res = new DNS(this);
 925
 926         log(DEBUG,"RES: %08x",this->Res);
 927
 928         this->LoadAllModules();
 929
 930         /* Just in case no modules were loaded - fix for bug #101 */
 931         this->BuildISupport();
 932
 933         if (!stats->BoundPortCount)
 934         {
 935                 printf("\nI couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 936                 Exit(ERROR);
 937         }
 938
 939         /* Add the listening sockets used for client inbound connections
 940          * to the socket engine
 941          */
 942         log(DEBUG,"%d listeners",stats->BoundPortCount);
 943         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 944         {
 945                 log(DEBUG,"Add listener: %d",Config->openSockfd[count]);
 946                 if (!SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
 947                 {
 948                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 949                         Exit(ERROR);
 950                 }
 951         }
 952
 953         if (!Config->nofork)
 954         {
 955                 fclose(stdout);
 956                 fclose(stderr);
 957                 fclose(stdin);
 958         }
 959
 960         printf("\nInspIRCd is now running!\n");
 961
 962         this->WritePID(Config->PID);
 963
 964         /* main loop, this never returns */
 965         expire_run = false;
 966         iterations = 0;
 967
 968         while (true)
 969         {
 970                 DoOneIteration(true);
 971         }
 972         /* This is never reached -- we hope! */
 973         return 0;
 974 }
 975
 976 /**********************************************************************************/
 977
 978 /**
 979  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 980  */
 981
 982 int main(int argc, char** argv)
 983 {
 984         /* This is a MatchCIDR() test suite -
 985         printf("Should be 0: %d\n",MatchCIDR("127.0.0.1","1.2.3.4/8"));
 986         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/8"));
 987         printf("Should be 1: %d\n",MatchCIDR("127.0.0.1","127.0.0.0/18"));
 988         printf("Should be 0: %d\n",MatchCIDR("3ffe::0","2fc9::0/16"));
 989         printf("Should be 1: %d\n",MatchCIDR("3ffe:1:3::0", "3ffe:1::0/32"));
 990         exit(0); */
 991
 992         try
 993         {
 994                 try
 995                 {
 996                         ServerInstance = new InspIRCd(argc, argv);
 997                         ServerInstance->Run();
 998                         DELETE(ServerInstance);
 999                 }
1000                 catch (std::bad_alloc&)
1001                 {
1002                         log(SPARSE,"You are out of memory! (got exception std::bad_alloc!)");
1003                         ServerInstance->SendError("**** OUT OF MEMORY **** We're gonna need a bigger boat!");
1004                 }
1005         }
1006         catch (...)
1007         {
1008                 log(SPARSE,"Uncaught exception, aborting.");
1009                 ServerInstance->SendError("Server terminating due to uncaught exception.");
1010         }
1011         return 0;
1012 }
1013
1014 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
1015  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
1016  * registration timeout maximum seconds)
1017  */
1018 bool InspIRCd::AllModulesReportReady(userrec* user)
1019 {
1020         if (!Config->global_implementation[I_OnCheckReady])
1021                 return true;
1022
1023         for (int i = 0; i <= this->GetModuleCount(); i++)
1024         {
1025                 if (Config->implement_lists[i][I_OnCheckReady])
1026                 {
1027                         int res = modules[i]->OnCheckReady(user);
1028                         if (!res)
1029                                 return false;
1030                 }
1031         }
1032         return true;
1033 }
1034
1035 int InspIRCd::GetModuleCount()
1036 {
1037         return this->ModCount;
1038 }
1039
1040 time_t InspIRCd::Time()
1041 {
1042         return TIME;
1043 }
1044