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 "inspircd.h"
  31 #include "configreader.h"
  32 #include <signal.h>
  33 #include <dirent.h>
  34 #include <exception>
  35 #include <fstream>
  36 #include "modules.h"
  37 #include "mode.h"
  38 #include "xline.h"
  39 #include "socketengine.h"
  40 #include "inspircd_se_config.h"
  41 #include "socket.h"
  42 #include "typedefs.h"
  43 #include "command_parse.h"
  44 #include <dlfcn.h>
  45
  46 using irc::sockets::NonBlocking;
  47 using irc::sockets::Blocking;
  48 using irc::sockets::insp_ntoa;
  49 using irc::sockets::insp_inaddr;
  50 using irc::sockets::insp_sockaddr;
  51
  52 InspIRCd* SI = NULL;
  53
  54 void InspIRCd::AddServerName(const std::string &servername)
  55 {
  56         this->Log(DEBUG,"Adding server name: %s",servername.c_str());
  57
  58         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  59                 servernames.push_back(servername); /* Wasn't already there. */
  60 }
  61
  62 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  63 {
  64         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  65
  66         if(iter == servernames.end())
  67         {
  68                 AddServerName(servername);
  69                 iter = --servernames.end();
  70         }
  71
  72         return iter->c_str();
  73 }
  74
  75 bool InspIRCd::FindServerName(const std::string &servername)
  76 {
  77         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
  78 }
  79
  80 void InspIRCd::Exit(int status)
  81 {
  82         exit (status);
  83 }
  84
  85 void InspIRCd::Start()
  86 {
  87         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
  88         printf("(C) ChatSpike Development team.\033[0m\n\n");
  89         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, jamie\033[0m\n");
  90         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
  91         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
  92 }
  93
  94 void InspIRCd::Rehash(int status)
  95 {
  96         SI->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
  97         fclose(SI->Config->log_file);
  98         SI->OpenLog(NULL,0);
  99         SI->Config->Read(false,NULL);
 100         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(""));
 101 }
 102
 103 void InspIRCd::SetSignals()
 104 {
 105         signal(SIGALRM, SIG_IGN);
 106         signal(SIGHUP, InspIRCd::Rehash);
 107         signal(SIGPIPE, SIG_IGN);
 108         signal(SIGTERM, InspIRCd::Exit);
 109         signal(SIGCHLD, SIG_IGN);
 110 }
 111
 112 bool InspIRCd::DaemonSeed()
 113 {
 114         int childpid;
 115         if ((childpid = fork ()) < 0)
 116                 return false;
 117         else if (childpid > 0)
 118         {
 119                 /* We wait here for the child process to kill us,
 120                  * so that the shell prompt doesnt come back over
 121                  * the output.
 122                  * Sending a kill with a signal of 0 just checks
 123                  * if the child pid is still around. If theyre not,
 124                  * they threw an error and we should give up.
 125                  */
 126                 while (kill(childpid, 0) != -1)
 127                         sleep(1);
 128                 exit(ERROR);
 129         }
 130         setsid ();
 131         umask (007);
 132         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 133
 134         rlimit rl;
 135         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 136         {
 137                 this->Log(DEFAULT,"Failed to getrlimit()!");
 138                 return false;
 139         }
 140         else
 141         {
 142                 rl.rlim_cur = rl.rlim_max;
 143                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 144                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 145         }
 146
 147         return true;
 148 }
 149
 150 void InspIRCd::WritePID(const std::string &filename)
 151 {
 152         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 153         if (*(fname.begin()) != '/')
 154         {
 155                 std::string::size_type pos;
 156                 std::string confpath = CONFIG_FILE;
 157                 if ((pos = confpath.find("/inspircd.conf")) != std::string::npos)
 158                 {
 159                         /* Leaves us with just the path */
 160                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 161                 }
 162         }
 163         std::ofstream outfile(fname.c_str());
 164         if (outfile.is_open())
 165         {
 166                 outfile << getpid();
 167                 outfile.close();
 168         }
 169         else
 170         {
 171                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 172                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 173                 Exit(0);
 174         }
 175 }
 176
 177 std::string InspIRCd::GetRevision()
 178 {
 179         return REVISION;
 180 }
 181
 182 InspIRCd::InspIRCd(int argc, char** argv)
 183         : ModCount(-1), duration_m(60), duration_h(60*60), duration_d(60*60*24), duration_w(60*60*24*7), duration_y(60*60*24*365)
 184 {
 185         modules.resize(255);
 186         factory.resize(255);
 187
 188         this->Config = new ServerConfig(this);
 189         this->Config->opertypes.clear();
 190         this->Config->operclass.clear();
 191         this->SNO = new SnomaskManager(this);
 192         this->Start();
 193         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 194         this->next_call = this->TIME + 3;
 195         srand(this->TIME);
 196         this->Log(DEBUG,"*** InspIRCd starting up!");
 197         if (!ServerConfig::FileExists(CONFIG_FILE))
 198         {
 199                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 200                 this->Log(DEFAULT,"main: no config");
 201                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 202                 Exit(ERROR);
 203         }
 204         *this->LogFileName = 0;
 205         if (argc > 1) {
 206                 for (int i = 1; i < argc; i++)
 207                 {
 208                         if (!strcmp(argv[i],"-nofork"))
 209                         {
 210                                 Config->nofork = true;
 211                         }
 212                         else if(!strcmp(argv[i],"-debug"))
 213                         {
 214                                 Config->forcedebug = true;
 215                         }
 216                         else if(!strcmp(argv[i],"-nolog"))
 217                         {
 218                                 Config->writelog = false;
 219                         }
 220                         else if (!strcmp(argv[i],"-wait"))
 221                         {
 222                                 sleep(6);
 223                         }
 224                         else if (!strcmp(argv[i],"-logfile"))
 225                         {
 226                                 if (argc > i+1)
 227                                 {
 228                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 229                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 230                                 }
 231                                 else
 232                                 {
 233                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 234                                         Exit(ERROR);
 235                                 }
 236                                 i++;
 237                         }
 238                         else
 239                         {
 240                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-logfile <filename>]\n",argv[0]);
 241                                 Exit(ERROR);
 242                         }
 243                 }
 244         }
 245
 246         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 247
 248         this->OpenLog(argv, argc);
 249         this->stats = new serverstats();
 250         this->Parser = new CommandParser(this);
 251         this->Timers = new TimerManager();
 252         this->XLines = new XLineManager(this);
 253         Config->ClearStack();
 254         Config->Read(true, NULL);
 255         this->CheckRoot();
 256         this->Modes = new ModeParser(this);
 257         this->AddServerName(Config->ServerName);
 258         CheckDie();
 259         InitializeDisabledCommands(Config->DisabledCommands, this);
 260         stats->BoundPortCount = BindPorts(true);
 261
 262         for(int t = 0; t < 255; t++)
 263                 Config->global_implementation[t] = 0;
 264
 265         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 266
 267         printf("\n");
 268         this->SetSignals();
 269         if (!Config->nofork)
 270         {
 271                 if (!this->DaemonSeed())
 272                 {
 273                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 274                         Exit(ERROR);
 275                 }
 276         }
 277
 278         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 279          * initialize the socket engine.
 280          */
 281         SocketEngineFactory* SEF = new SocketEngineFactory();
 282         SE = SEF->Create(this);
 283         delete SEF;
 284
 285         this->Res = new DNS(this);
 286
 287         this->LoadAllModules();
 288         /* Just in case no modules were loaded - fix for bug #101 */
 289         this->BuildISupport();
 290
 291         if (!stats->BoundPortCount)
 292         {
 293                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 294                 Exit(ERROR);
 295         }
 296
 297         /* Add the listening sockets used for client inbound connections
 298          * to the socket engine
 299          */
 300         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 301         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 302         {
 303                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]->GetFd());
 304                 if (!SE->AddFd(Config->openSockfd[count]))
 305                 {
 306                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 307                         Exit(ERROR);
 308                 }
 309         }
 310
 311         if (!Config->nofork)
 312         {
 313                 if (kill(getppid(), SIGTERM) == -1)
 314                         printf("Error killing parent process: %s\n",strerror(errno));
 315                 fclose(stdin);
 316                 fclose(stderr);
 317                 fclose(stdout);
 318         }
 319
 320         printf("\nInspIRCd is now running!\n");
 321
 322         this->WritePID(Config->PID);
 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                         delete *t;
 353                         factory.erase(t);
 354                         factory.push_back(NULL);
 355                         return;
 356                 }
 357                 v++;
 358         }
 359 }
 360
 361 void InspIRCd::EraseModule(int j)
 362 {
 363         int v1 = 0;
 364         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 365         {
 366                 if (v1 == j)
 367                 {
 368                         DELETE(*m);
 369                         modules.erase(m);
 370                         modules.push_back(NULL);
 371                         break;
 372                 }
 373                 v1++;
 374         }
 375         int v2 = 0;
 376         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 377         {
 378                 if (v2 == j)
 379                 {
 380                        Config->module_names.erase(v);
 381                        break;
 382                 }
 383                 v2++;
 384         }
 385
 386 }
 387
 388 void InspIRCd::MoveTo(std::string modulename,int slot)
 389 {
 390         unsigned int v2 = 256;
 391         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 392         {
 393                 if (Config->module_names[v] == modulename)
 394                 {
 395                         // found an instance, swap it with the item at the end
 396                         v2 = v;
 397                         break;
 398                 }
 399         }
 400         if ((v2 != (unsigned int)slot) && (v2 < 256))
 401         {
 402                 // Swap the module names over
 403                 Config->module_names[v2] = Config->module_names[slot];
 404                 Config->module_names[slot] = modulename;
 405                 // now swap the module factories
 406                 ircd_module* temp = factory[v2];
 407                 factory[v2] = factory[slot];
 408                 factory[slot] = temp;
 409                 // now swap the module objects
 410                 Module* temp_module = modules[v2];
 411                 modules[v2] = modules[slot];
 412                 modules[slot] = temp_module;
 413                 // now swap the implement lists (we dont
 414                 // need to swap the global or recount it)
 415                 for (int n = 0; n < 255; n++)
 416                 {
 417                         char x = Config->implement_lists[v2][n];
 418                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 419                         Config->implement_lists[slot][n] = x;
 420                 }
 421         }
 422         else
 423         {
 424                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 425         }
 426 }
 427
 428 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 429 {
 430         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 431         {
 432                 if (Config->module_names[v] == after)
 433                 {
 434                         MoveTo(modulename, v);
 435                         return;
 436                 }
 437         }
 438 }
 439
 440 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 441 {
 442         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 443         {
 444                 if (Config->module_names[v] == before)
 445                 {
 446                         if (v > 0)
 447                         {
 448                                 MoveTo(modulename, v-1);
 449                         }
 450                         else
 451                         {
 452                                 MoveTo(modulename, v);
 453                         }
 454                         return;
 455                 }
 456         }
 457 }
 458
 459 void InspIRCd::MoveToFirst(std::string modulename)
 460 {
 461         MoveTo(modulename,0);
 462 }
 463
 464 void InspIRCd::MoveToLast(std::string modulename)
 465 {
 466         MoveTo(modulename,this->GetModuleCount());
 467 }
 468
 469 void InspIRCd::BuildISupport()
 470 {
 471         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 472         std::stringstream v;
 473         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 474         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 475         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 476         Config->data005 = v.str();
 477         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 478 }
 479
 480 bool InspIRCd::UnloadModule(const char* filename)
 481 {
 482         std::string filename_str = filename;
 483         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 484         {
 485                 if (Config->module_names[j] == filename_str)
 486                 {
 487                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 488                         {
 489                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 490                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 491                                 return false;
 492                         }
 493                         /* Give the module a chance to tidy out all its metadata */
 494                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 495                         {
 496                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 497                         }
 498                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 499                         {
 500                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 501                         }
 502
 503                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 504
 505                         for(int t = 0; t < 255; t++)
 506                         {
 507                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 508                         }
 509
 510                         /* We have to renumber implement_lists after unload because the module numbers change!
 511                          */
 512                         for(int j2 = j; j2 < 254; j2++)
 513                         {
 514                                 for(int t = 0; t < 255; t++)
 515                                 {
 516                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 517                                 }
 518                         }
 519
 520                         // found the module
 521                         this->Log(DEBUG,"Removing dependent commands...");
 522                         Parser->RemoveCommands(filename);
 523                         this->Log(DEBUG,"Deleting module...");
 524                         this->EraseModule(j);
 525                         this->Log(DEBUG,"Erasing module entry...");
 526                         this->EraseFactory(j);
 527                         this->Log(DEFAULT,"Module %s unloaded",filename);
 528                         this->ModCount--;
 529                         BuildISupport();
 530                         return true;
 531                 }
 532         }
 533         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 534         snprintf(MODERR,MAXBUF,"Module not loaded");
 535         return false;
 536 }
 537
 538 bool InspIRCd::LoadModule(const char* filename)
 539 {
 540         if (strchr(filename,'*') || (strchr(filename,'?')))
 541         {
 542                 bool all_success = true;
 543                 int n_match = 0;
 544                 DIR* library = opendir(Config->ModPath);
 545                 if (library)
 546                 {
 547                         dirent* entry = NULL;
 548                         while ((entry = readdir(library)))
 549                         {
 550                                 if (this->MatchText(entry->d_name, filename))
 551                                 {
 552                                         n_match++;
 553                                         if (!this->LoadModule(entry->d_name))
 554                                                 all_success = false;
 555                                 }
 556                         }
 557                         closedir(library);
 558                 }
 559                 return (all_success && n_match);
 560         }
 561
 562         char modfile[MAXBUF];
 563         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 564         std::string filename_str = filename;
 565
 566         if (!ServerConfig::DirValid(modfile))
 567         {
 568                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 569                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 570                 return false;
 571         }
 572         this->Log(DEBUG,"Loading module: %s",modfile);
 573
 574         if (ServerConfig::FileExists(modfile))
 575         {
 576
 577                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 578                 {
 579                         if (Config->module_names[j] == filename_str)
 580                         {
 581                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 582                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 583                                 return false;
 584                         }
 585                 }
 586                 try
 587                 {
 588                         ircd_module* a = new ircd_module(this, modfile);
 589                         factory[this->ModCount+1] = a;
 590                         if (factory[this->ModCount+1]->LastError())
 591                         {
 592                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 593                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 594                                 return false;
 595                         }
 596                         if ((long)factory[this->ModCount+1]->factory != -1)
 597                         {
 598                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 599
 600                                 Version v = m->GetVersion();
 601
 602                                 if (v.API != API_VERSION)
 603                                 {
 604                                         delete m;
 605                                         delete a;
 606                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 607                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 608                                         return false;
 609                                 }
 610                                 else
 611                                 {
 612                                         this->Log(DEFAULT,"New module introduced: %s (API version %d, Module version %d.%d.%d.%d)%s", filename, v.API, v.Major, v.Minor, v.Revision, v.Build, (!(v.Flags & VF_VENDOR) ? " [3rd Party]" : " [Vendor]"));
 613                                 }
 614
 615                                 modules[this->ModCount+1] = m;
 616                                 /* save the module and the module's classfactory, if
 617                                  * this isnt done, random crashes can occur :/ */
 618                                 Config->module_names.push_back(filename);
 619
 620                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 621                                 for(int t = 0; t < 255; t++)
 622                                         x[t] = 0;
 623
 624                                 modules[this->ModCount+1]->Implements(x);
 625
 626                                 for(int t = 0; t < 255; t++)
 627                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 628                         }
 629                         else
 630                         {
 631                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 632                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 633                                 return false;
 634                         }
 635                 }
 636                 catch (ModuleException& modexcept)
 637                 {
 638                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 639                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 640                         return false;
 641                 }
 642         }
 643         else
 644         {
 645                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 646                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 647                 return false;
 648         }
 649         this->ModCount++;
 650         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 651         // now work out which modules, if any, want to move to the back of the queue,
 652         // and if they do, move them there.
 653         std::vector<std::string> put_to_back;
 654         std::vector<std::string> put_to_front;
 655         std::map<std::string,std::string> put_before;
 656         std::map<std::string,std::string> put_after;
 657         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 658         {
 659                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 660                         put_to_back.push_back(Config->module_names[j]);
 661                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 662                         put_to_front.push_back(Config->module_names[j]);
 663                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 664                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 665                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 666                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 667         }
 668         for (unsigned int j = 0; j < put_to_back.size(); j++)
 669                 MoveToLast(put_to_back[j]);
 670         for (unsigned int j = 0; j < put_to_front.size(); j++)
 671                 MoveToFirst(put_to_front[j]);
 672         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 673                 MoveBefore(j->first,j->second);
 674         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 675                 MoveAfter(j->first,j->second);
 676         BuildISupport();
 677         return true;
 678 }
 679
 680 void InspIRCd::DoOneIteration(bool process_module_sockets)
 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 != OLDTIME)
 694         {
 695                 if (TIME < OLDTIME)
 696                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 697                 if ((TIME % 3600) == 0)
 698                 {
 699                         irc::whowas::MaintainWhoWas(this, TIME);
 700                 }
 701                 Timers->TickTimers(TIME);
 702                 this->DoBackgroundUserStuff(TIME);
 703
 704                 if ((TIME % 5) == 0)
 705                 {
 706                         XLines->expire_lines();
 707                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 708                         Timers->TickMissedTimers(TIME);
 709                 }
 710         }
 711
 712         /* Call the socket engine to wait on the active
 713          * file descriptors. The socket engine has everything's
 714          * descriptors in its list... dns, modules, users,
 715          * servers... so its nice and easy, just one call.
 716          * This will cause any read or write events to be
 717          * dispatched to their handlers.
 718          */
 719         SE->DispatchEvents();
 720 }
 721
 722 bool InspIRCd::IsIdent(const char* n)
 723 {
 724         if (!n || !*n)
 725                 return false;
 726
 727         for (char* i = (char*)n; *i; i++)
 728         {
 729                 if ((*i >= 'A') && (*i <= '}'))
 730                 {
 731                         continue;
 732                 }
 733                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 734                 {
 735                         continue;
 736                 }
 737                 return false;
 738         }
 739         return true;
 740 }
 741
 742
 743 int InspIRCd::Run()
 744 {
 745         while (true)
 746         {
 747                 DoOneIteration(true);
 748         }
 749         /* This is never reached -- we hope! */
 750         return 0;
 751 }
 752
 753 /**********************************************************************************/
 754
 755 /**
 756  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 757  */
 758
 759 int main(int argc, char** argv)
 760 {
 761         SI = new InspIRCd(argc, argv);
 762         SI->Run();
 763         delete SI;
 764         return 0;
 765 }
 766
 767 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 768  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 769  * registration timeout maximum seconds)
 770  */
 771 bool InspIRCd::AllModulesReportReady(userrec* user)
 772 {
 773         if (!Config->global_implementation[I_OnCheckReady])
 774                 return true;
 775
 776         for (int i = 0; i <= this->GetModuleCount(); i++)
 777         {
 778                 if (Config->implement_lists[i][I_OnCheckReady])
 779                 {
 780                         int res = modules[i]->OnCheckReady(user);
 781                         if (!res)
 782                                 return false;
 783                 }
 784         }
 785         return true;
 786 }
 787
 788 int InspIRCd::GetModuleCount()
 789 {
 790         return this->ModCount;
 791 }
 792
 793 time_t InspIRCd::Time()
 794 {
 795         return TIME;
 796 }
 797
 798 bool FileLogger::Readable()
 799 {
 800         return false;
 801 }
 802
 803 void FileLogger::HandleEvent(EventType et, int errornum)
 804 {
 805         this->WriteLogLine("");
 806         ServerInstance->SE->DelFd(this);
 807 }
 808
 809 void FileLogger::WriteLogLine(const std::string &line)
 810 {
 811         if (line.length())
 812                 buffer.append(line);
 813
 814         if (log)
 815         {
 816                 int written = fprintf(log,"%s",buffer.c_str());
 817                 if ((written >= 0) && (written < (int)buffer.length()))
 818                 {
 819                         buffer.erase(0, buffer.length());
 820                         ServerInstance->SE->AddFd(this);
 821                 }
 822                 else if (written == -1)
 823                 {
 824                         if (errno == EAGAIN)
 825                                 ServerInstance->SE->AddFd(this);
 826                 }
 827                 else
 828                 {
 829                         /* Wrote the whole buffer, and no need for write callback */
 830                         buffer = "";
 831                 }
 832         }
 833         if (writeops++ % 20)
 834         {
 835                 fflush(log);
 836         }
 837 }
 838
 839 void FileLogger::Close()
 840 {
 841         if (log)
 842         {
 843                 int flags = fcntl(fileno(log), F_GETFL, 0);
 844                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
 845                 if (buffer.size())
 846                         fprintf(log,"%s",buffer.c_str());
 847                 fflush(log);
 848                 fclose(log);
 849         }
 850         buffer = "";
 851         ServerInstance->SE->DelFd(this);
 852 }
 853
 854 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
 855 {
 856         irc::sockets::NonBlocking(fileno(log));
 857         this->SetFd(fileno(log));
 858         buffer = "";
 859 }
 860
 861 FileLogger::~FileLogger()
 862 {
 863         this->Close();
 864 }
 865