src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "configreader.h"
  16 #include <signal.h>
  17 #ifndef WIN32
  18
  19 #include <dirent.h>
  20 #include <unistd.h>
  21 #include <sys/resource.h>
  22
  23 /* This is just to be completely certain that the change which fixed getrusage on RH7 doesn't break anything else -- Om */
  24 #ifndef RUSAGE_SELF
  25 #define RUSAGE_SELF 0
  26 #endif
  27
  28 #endif
  29 #include <exception>
  30 #include <fstream>
  31 #include "modules.h"
  32 #include "mode.h"
  33 #include "xline.h"
  34 #include "socketengine.h"
  35 #include "inspircd_se_config.h"
  36 #include "socket.h"
  37 #include "typedefs.h"
  38 #include "command_parse.h"
  39 #include "exitcodes.h"
  40
  41 #ifndef WIN32
  42 #include <dlfcn.h>
  43 #include <getopt.h>
  44 #else
  45 static DWORD owner_processid = 0;
  46
  47 DWORD WindowsForkStart(InspIRCd * Instance)
  48 {
  49         /* Windows implementation of fork() :P */
  50         // Build the command line arguments.
  51         string command_line;
  52         for(int i = 0; i < Instance->Config->argc; ++i)
  53                 command_line += Instance->Config->argv[i];
  54
  55         char module[MAX_PATH];
  56         if(!GetModuleFileName(NULL, module, MAX_PATH))
  57                 return false;
  58
  59         STARTUPINFO startupinfo;
  60         PROCESS_INFORMATION procinfo;
  61         ZeroMemory(&startupinfo, sizeof(STARTUPINFO));
  62         ZeroMemory(&procinfo, sizeof(PROCESS_INFORMATION));
  63
  64         // Fill in the startup info struct
  65         GetStartupInfo(&startupinfo);
  66
  67         // Create the "startup" event
  68         HANDLE fork_event = CreateEvent(0, TRUE, FALSE, "InspStartup");
  69         if(!fork_event)
  70                 return false;
  71
  72         // Launch our "forked" process.
  73         BOOL bSuccess = CreateProcess ( module, module,
  74                 0,                                                                      // PROCESS_SECURITY_ATTRIBUTES
  75                 0,                                                                      // THREAD_SECURITY_ATTRIBUTES
  76                 TRUE,                                                           // We went to inherit handles.
  77                 CREATE_SUSPENDED |                                      // Suspend the primary thread of the new process
  78                 CREATE_PRESERVE_CODE_AUTHZ_LEVEL,       // Allow us full access to the process
  79                 0,                                                                      // ENVIRONMENT
  80                 0,                                                                      // CURRENT_DIRECTORY
  81                 &startupinfo,                                           // startup info
  82                 &procinfo);                                                     // process info
  83
  84         if(!bSuccess)
  85                 return false;
  86
  87         // Set the owner process id in the target process.
  88         SIZE_T written = 0;
  89         DWORD pid = GetCurrentProcessId();
  90         if(!WriteProcessMemory(procinfo.hProcess, &owner_processid, &pid, sizeof(DWORD), &written) || written != sizeof(DWORD))
  91                 return false;
  92
  93         // Resume the other thread (let it start)
  94         ResumeThread(procinfo.hThread);
  95
  96         // Wait for the new process to kill us. If there is some error, the new process will end and we will end up at the next line.
  97         WaitForSingleObject(procinfo.hProcess, INFINITE);
  98
  99         // If we hit this it means startup failed, default to 14 if this fails.
 100         DWORD ExitCode = 14;
 101         GetExitCodeProcess(procinfo.hProcess, &ExitCode);
 102         CloseHandle(procinfo.hThread);
 103 }
 104
 105 void WindowsForkKillOwner(InspIRCd * Instance)
 106 {
 107         HANDLE hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, owner_processid);
 108         if(!hProcess || !owner_processid)
 109                 Instance->Exit(14);
 110
 111         // die die die
 112         if(!TerminateProcess(hProcess, 0))
 113                 Instance->Exit(14);
 114
 115         CloseHandle(hProcess);
 116 }
 117
 118 #endif
 119
 120 using irc::sockets::NonBlocking;
 121 using irc::sockets::Blocking;
 122 using irc::sockets::insp_ntoa;
 123 using irc::sockets::insp_inaddr;
 124 using irc::sockets::insp_sockaddr;
 125
 126 InspIRCd* SI = NULL;
 127
 128 /* Burlex: Moved from exitcodes.h -- due to duplicate symbols */
 129 const char* ExitCodes[] =
 130 {
 131                 "No error", /* 0 */
 132                 "DIE command", /* 1 */
 133                 "execv() failed", /* 2 */
 134                 "Internal error", /* 3 */
 135                 "Config file error", /* 4 */
 136                 "Logfile error", /* 5 */
 137                 "Fork failed", /* 6 */
 138                 "Bad commandline parameters", /* 7 */
 139                 "No ports could be bound", /* 8 */
 140                 "Can't write PID file", /* 9 */
 141                 "SocketEngine could not initialize", /* 10 */
 142                 "Refusing to start up as root", /* 11 */
 143                 "Found a <die> tag!", /* 12 */
 144                 "Couldn't load module on startup", /* 13 */
 145                 "Could not create forked process", /* 14 */
 146                 "Received SIGTERM", /* 15 */
 147 };
 148
 149 void InspIRCd::AddServerName(const std::string &servername)
 150 {
 151         servernamelist::iterator itr = servernames.begin();
 152         for(; itr != servernames.end(); ++itr)
 153                 if(**itr == servername)
 154                         return;
 155
 156         string * ns = new string(servername);
 157         servernames.push_back(ns);
 158 }
 159
 160 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
 161 {
 162         servernamelist::iterator itr = servernames.begin();
 163         for(; itr != servernames.end(); ++itr)
 164                 if(**itr == servername)
 165                         return (*itr)->c_str();
 166
 167         servernames.push_back(new string(servername));
 168         itr = --servernames.end();
 169         return (*itr)->c_str();
 170 }
 171
 172 bool InspIRCd::FindServerName(const std::string &servername)
 173 {
 174         servernamelist::iterator itr = servernames.begin();
 175         for(; itr != servernames.end(); ++itr)
 176                 if(**itr == servername)
 177                         return true;
 178         return false;
 179 }
 180
 181 void InspIRCd::Exit(int status)
 182 {
 183 #ifdef WINDOWS
 184         CloseIPC();
 185 #endif
 186         if (SI)
 187         {
 188                 SI->SendError("Exiting with status " + ConvToStr(status) + " (" + std::string(ExitCodes[status]) + ")");
 189                 SI->Cleanup();
 190         }
 191         exit (status);
 192 }
 193
 194 void InspIRCd::Cleanup()
 195 {
 196         std::vector<std::string> mymodnames;
 197         int MyModCount = this->GetModuleCount();
 198
 199         for (unsigned int i = 0; i < Config->ports.size(); i++)
 200         {
 201                 /* This calls the constructor and closes the listening socket */
 202                 delete Config->ports[i];
 203         }
 204
 205         Config->ports.clear();
 206
 207         /* Close all client sockets, or the new process inherits them */
 208         for (std::vector<userrec*>::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
 209         {
 210                 (*i)->SetWriteError("Server shutdown");
 211                 (*i)->CloseSocket();
 212         }
 213
 214         /* We do this more than once, so that any service providers get a
 215          * chance to be unhooked by the modules using them, but then get
 216          * a chance to be removed themsleves.
 217          */
 218         for (int tries = 0; tries < 3; tries++)
 219         {
 220                 MyModCount = this->GetModuleCount();
 221                 mymodnames.clear();
 222
 223                 /* Unload all modules, so they get a chance to clean up their listeners */
 224                 for (int j = 0; j <= MyModCount; j++)
 225                         mymodnames.push_back(Config->module_names[j]);
 226
 227                 for (int k = 0; k <= MyModCount; k++)
 228                         this->UnloadModule(mymodnames[k].c_str());
 229         }
 230
 231         /* Close logging */
 232         this->Logger->Close();
 233
 234         /* Cleanup Server Names */
 235         for(servernamelist::iterator itr = servernames.begin(); itr != servernames.end(); ++itr)
 236                 delete (*itr);
 237
 238 #ifdef WINDOWS
 239         /* WSACleanup */
 240         WSACleanup();
 241 #endif
 242 }
 243
 244 void InspIRCd::Restart(const std::string &reason)
 245 {
 246         /* SendError flushes each client's queue,
 247          * regardless of writeability state
 248          */
 249         this->SendError(reason);
 250
 251         this->Cleanup();
 252
 253         /* Figure out our filename (if theyve renamed it, we're boned) */
 254         std::string me;
 255
 256 #ifdef WINDOWS
 257         char module[MAX_PATH];
 258         if (GetModuleFileName(NULL, module, MAX_PATH))
 259                 me = module;
 260 #else
 261         me = Config->MyDir + "/inspircd";
 262 #endif
 263
 264         if (execv(me.c_str(), Config->argv) == -1)
 265         {
 266                 /* Will raise a SIGABRT if not trapped */
 267                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 268         }
 269 }
 270
 271 void InspIRCd::Start()
 272 {
 273         printf_c("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 274         printf_c("(C) InspIRCd Development Team.\033[0m\n\n");
 275         printf_c("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey, Burlex\033[0m\n");
 276         printf_c("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 277 }
 278
 279 void InspIRCd::Rehash(int status)
 280 {
 281         SI->WriteOpers("*** Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(SI->ConfigFileName));
 282         SI->CloseLog();
 283         SI->OpenLog(SI->Config->argv, SI->Config->argc);
 284         SI->RehashUsersAndChans();
 285         FOREACH_MOD_I(SI, I_OnGarbageCollect, OnGarbageCollect());
 286         SI->Config->Read(false,NULL);
 287         SI->ResetMaxBans();
 288         SI->Res->Rehash();
 289         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(NULL,""));
 290         SI->BuildISupport();
 291 }
 292
 293 void InspIRCd::ResetMaxBans()
 294 {
 295         for (chan_hash::const_iterator i = chanlist->begin(); i != chanlist->end(); i++)
 296                 i->second->ResetMaxBans();
 297 }
 298
 299
 300 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 301  * we must occasionally rehash the hash (yes really).
 302  * We do this by copying the entries from the old hash to a new hash, causing all
 303  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 304  * very expensive, so instead we do it when the user types /REHASH and expects a
 305  * short delay anyway.
 306  */
 307 void InspIRCd::RehashUsersAndChans()
 308 {
 309         user_hash* old_users = this->clientlist;
 310         chan_hash* old_chans = this->chanlist;
 311
 312         this->clientlist = new user_hash();
 313         this->chanlist = new chan_hash();
 314
 315         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 316                 this->clientlist->insert(*n);
 317
 318         delete old_users;
 319
 320         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 321                 this->chanlist->insert(*n);
 322
 323         delete old_chans;
 324 }
 325
 326 void InspIRCd::CloseLog()
 327 {
 328         this->Logger->Close();
 329 }
 330
 331 void InspIRCd::SetSignals()
 332 {
 333 #ifndef WIN32
 334         signal(SIGALRM, SIG_IGN);
 335         signal(SIGHUP, InspIRCd::Rehash);
 336         signal(SIGPIPE, SIG_IGN);
 337         signal(SIGCHLD, SIG_IGN);
 338 #endif
 339         signal(SIGTERM, InspIRCd::Exit);
 340 }
 341
 342 void InspIRCd::QuickExit(int status)
 343 {
 344         exit(0);
 345 }
 346
 347 bool InspIRCd::DaemonSeed()
 348 {
 349 #ifdef WINDOWS
 350         return true;
 351 #else
 352         signal(SIGTERM, InspIRCd::QuickExit);
 353
 354         int childpid;
 355         if ((childpid = fork ()) < 0)
 356                 return false;
 357         else if (childpid > 0)
 358         {
 359                 /* We wait here for the child process to kill us,
 360                  * so that the shell prompt doesnt come back over
 361                  * the output.
 362                  * Sending a kill with a signal of 0 just checks
 363                  * if the child pid is still around. If theyre not,
 364                  * they threw an error and we should give up.
 365                  */
 366                 while (kill(childpid, 0) != -1)
 367                         sleep(1);
 368                 exit(0);
 369         }
 370         setsid ();
 371         umask (007);
 372         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 373
 374         signal(SIGTERM, InspIRCd::Exit);
 375
 376         rlimit rl;
 377         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 378         {
 379                 this->Log(DEFAULT,"Failed to getrlimit()!");
 380                 return false;
 381         }
 382         else
 383         {
 384                 rl.rlim_cur = rl.rlim_max;
 385                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 386                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 387         }
 388
 389         return true;
 390 #endif
 391 }
 392
 393 void InspIRCd::WritePID(const std::string &filename)
 394 {
 395         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 396         if (*(fname.begin()) != '/')
 397         {
 398                 std::string::size_type pos;
 399                 std::string confpath = this->ConfigFileName;
 400                 if ((pos = confpath.rfind("/")) != std::string::npos)
 401                 {
 402                         /* Leaves us with just the path */
 403                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 404                 }
 405         }
 406         std::ofstream outfile(fname.c_str());
 407         if (outfile.is_open())
 408         {
 409                 outfile << getpid();
 410                 outfile.close();
 411         }
 412         else
 413         {
 414                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 415                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 416                 Exit(EXIT_STATUS_PID);
 417         }
 418 }
 419
 420 std::string InspIRCd::GetRevision()
 421 {
 422         return REVISION;
 423 }
 424
 425 InspIRCd::InspIRCd(int argc, char** argv)
 426         : ModCount(-1), GlobalCulls(this)
 427 {
 428         int found_ports = 0;
 429         FailedPortList pl;
 430         int do_version = 0, do_nofork = 0, do_debug = 0, do_nolog = 0, do_root = 0;    /* flag variables */
 431         char c = 0;
 432
 433         modules.resize(255);
 434         factory.resize(255);
 435         memset(&server, 0, sizeof(server));
 436         memset(&client, 0, sizeof(client));
 437
 438         this->unregistered_count = 0;
 439
 440         this->clientlist = new user_hash();
 441         this->chanlist = new chan_hash();
 442
 443         this->Config = new ServerConfig(this);
 444
 445         this->Config->argv = argv;
 446         this->Config->argc = argc;
 447
 448         chdir(Config->GetFullProgDir().c_str());
 449
 450         this->Config->opertypes.clear();
 451         this->Config->operclass.clear();
 452         this->SNO = new SnomaskManager(this);
 453         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 454         this->time_delta = 0;
 455         this->next_call = this->TIME + 3;
 456         srand(this->TIME);
 457
 458         *this->LogFileName = 0;
 459         strlcpy(this->ConfigFileName, CONFIG_FILE, MAXBUF);
 460
 461         struct option longopts[] =
 462         {
 463                 { "nofork",             no_argument,            &do_nofork,             1       },
 464                 { "logfile",    required_argument,      NULL,                   'f'     },
 465                 { "config",             required_argument,      NULL,                   'c'     },
 466                 { "debug",              no_argument,            &do_debug,              1       },
 467                 { "nolog",              no_argument,            &do_nolog,              1       },
 468                 { "runasroot",  no_argument,            &do_root,               1       },
 469                 { "version",    no_argument,            &do_version,    1       },
 470                 { 0, 0, 0, 0 }
 471         };
 472
 473         while ((c = getopt_long_only(argc, argv, ":f:", longopts, NULL)) != -1)
 474         {
 475                 switch (c)
 476                 {
 477                         case 'f':
 478                                 /* Log filename was set */
 479                                 strlcpy(LogFileName, optarg, MAXBUF);
 480                                 printf("LOG: Setting logfile to %s\n", LogFileName);
 481                         break;
 482                         case 'c':
 483                                 /* Config filename was set */
 484                                 strlcpy(ConfigFileName, optarg, MAXBUF);
 485                                 printf("CONFIG: Setting config file to %s\n", ConfigFileName);
 486                         break;
 487                         case 0:
 488                                 /* getopt_long_only() set an int variable, just keep going */
 489                         break;
 490                         default:
 491                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 492                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>] [--runasroot] [--version] [--config <config>]\n", argv[0]);
 493                                 Exit(EXIT_STATUS_ARGV);
 494                         break;
 495                 }
 496         }
 497
 498         if (do_version)
 499         {
 500                 printf("\n%s r%s\n", VERSION, REVISION);
 501                 Exit(EXIT_STATUS_NOERROR);
 502         }
 503
 504 #ifdef WIN32
 505
 506         // Handle forking
 507         if(!do_nofork && !owner_processid)
 508         {
 509                 DWORD ExitCode = WindowsForkStart(this);
 510                 if(ExitCode)
 511                         Exit(ExitCode);
 512         }
 513
 514         // Set up winsock
 515         WSADATA wsadata;
 516         WSAStartup(MAKEWORD(2,0), &wsadata);
 517
 518 #endif
 519         if (!ServerConfig::FileExists(this->ConfigFileName))
 520         {
 521                 printf("ERROR: Cannot open config file: %s\nExiting...\n", this->ConfigFileName);
 522                 this->Log(DEFAULT,"Unable to open config file %s", this->ConfigFileName);
 523                 Exit(EXIT_STATUS_CONFIG);
 524         }
 525
 526         this->Start();
 527
 528         /* Set the finished argument values */
 529         Config->nofork = do_nofork;
 530         Config->forcedebug = do_debug;
 531         Config->writelog = !do_nolog;
 532
 533         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 534
 535         this->OpenLog(argv, argc);
 536
 537         this->stats = new serverstats();
 538         this->Timers = new TimerManager(this);
 539         this->Parser = new CommandParser(this);
 540         this->XLines = new XLineManager(this);
 541         Config->ClearStack();
 542         Config->Read(true, NULL);
 543
 544         if (!do_root)
 545                 this->CheckRoot();
 546         else
 547         {
 548                 printf("* WARNING * WARNING * WARNING * WARNING * WARNING * \n\n");
 549                 printf("YOU ARE RUNNING INSPIRCD AS ROOT. THIS IS UNSUPPORTED\n");
 550                 printf("AND IF YOU ARE HACKED, CRACKED, SPINDLED OR MUTILATED\n");
 551                 printf("OR ANYTHING ELSE UNEXPECTED HAPPENS TO YOU OR YOUR\n");
 552                 printf("SERVER, THEN IT IS YOUR OWN FAULT. IF YOU DID NOT MEAN\n");
 553                 printf("TO START INSPIRCD AS ROOT, HIT CTRL+C NOW AND RESTART\n");
 554                 printf("THE PROGRAM AS A NORMAL USER. YOU HAVE BEEN WARNED!\n");
 555                 printf("\nInspIRCd starting in 20 seconds, ctrl+c to abort...\n");
 556                 sleep(20);
 557         }
 558
 559         this->SetSignals();
 560
 561         if (!Config->nofork)
 562         {
 563                 if (!this->DaemonSeed())
 564                 {
 565                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 566                         Log(DEFAULT,"ERROR: could not go into daemon mode. Shutting down.");
 567                         Exit(EXIT_STATUS_FORK);
 568                 }
 569         }
 570
 571
 572         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 573          * initialize the socket engine.
 574          */
 575         SocketEngineFactory* SEF = new SocketEngineFactory();
 576         SE = SEF->Create(this);
 577         delete SEF;
 578
 579         this->Modes = new ModeParser(this);
 580         this->AddServerName(Config->ServerName);
 581         CheckDie();
 582         int bounditems = BindPorts(true, found_ports, pl);
 583
 584         for(int t = 0; t < 255; t++)
 585                 Config->global_implementation[t] = 0;
 586
 587         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 588
 589         printf("\n");
 590
 591         this->Res = new DNS(this);
 592
 593         this->LoadAllModules();
 594         /* Just in case no modules were loaded - fix for bug #101 */
 595         this->BuildISupport();
 596         InitializeDisabledCommands(Config->DisabledCommands, this);
 597
 598         if ((Config->ports.size() == 0) && (found_ports > 0))
 599         {
 600                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 601                 Log(DEFAULT,"ERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?");
 602                 Exit(EXIT_STATUS_BIND);
 603         }
 604
 605         if (Config->ports.size() != (unsigned int)found_ports)
 606         {
 607                 printf("\nWARNING: Not all your client ports could be bound --\nstarting anyway with %d of %d client ports bound.\n\n", bounditems, found_ports);
 608                 printf("The following port(s) failed to bind:\n");
 609                 int j = 1;
 610                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 611                 {
 612                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 613                 }
 614         }
 615 #ifndef WINDOWS
 616         if (!Config->nofork)
 617         {
 618                 if (kill(getppid(), SIGTERM) == -1)
 619                 {
 620                         printf("Error killing parent process: %s\n",strerror(errno));
 621                         Log(DEFAULT,"Error killing parent process: %s",strerror(errno));
 622                 }
 623         }
 624
 625         if (isatty(0) && isatty(1) && isatty(2))
 626         {
 627                 /* We didn't start from a TTY, we must have started from a background process -
 628                  * e.g. we are restarting, or being launched by cron. Dont kill parent, and dont
 629                  * close stdin/stdout
 630                  */
 631                 if (!do_nofork)
 632                 {
 633                         fclose(stdin);
 634                         fclose(stderr);
 635                         fclose(stdout);
 636                 }
 637                 else
 638                 {
 639                         Log(DEFAULT,"Keeping pseudo-tty open as we are running in the foreground.");
 640                 }
 641         }
 642 #else
 643         InitIPC();
 644         if(!Config->nofork)
 645         {
 646                 WindowsForkKillOwner(this);
 647                 FreeConsole();
 648         }
 649 #endif
 650         printf("\nInspIRCd is now running!\n");
 651         Log(DEFAULT,"Startup complete.");
 652
 653         this->WritePID(Config->PID);
 654 }
 655
 656 std::string InspIRCd::GetVersionString()
 657 {
 658         char versiondata[MAXBUF];
 659         char dnsengine[] = "singlethread-object";
 660
 661         if (*Config->CustomVersion)
 662         {
 663                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 664         }
 665         else
 666         {
 667                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%s,%s,%s]",VERSION,Config->ServerName,SYSTEM,REVISION,SE->GetName().c_str(),dnsengine);
 668         }
 669         return versiondata;
 670 }
 671
 672 char* InspIRCd::ModuleError()
 673 {
 674         return MODERR;
 675 }
 676
 677 void InspIRCd::EraseFactory(int j)
 678 {
 679         int v = 0;
 680         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 681         {
 682                 if (v == j)
 683                 {
 684                         delete *t;
 685                         factory.erase(t);
 686                         factory.push_back(NULL);
 687                         return;
 688                 }
 689                 v++;
 690         }
 691 }
 692
 693 void InspIRCd::EraseModule(int j)
 694 {
 695         int v1 = 0;
 696         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 697         {
 698                 if (v1 == j)
 699                 {
 700                         DELETE(*m);
 701                         modules.erase(m);
 702                         modules.push_back(NULL);
 703                         break;
 704                 }
 705                 v1++;
 706         }
 707         int v2 = 0;
 708         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 709         {
 710                 if (v2 == j)
 711                 {
 712                         Config->module_names.erase(v);
 713                         break;
 714                 }
 715                 v2++;
 716         }
 717
 718 }
 719
 720 void InspIRCd::MoveTo(std::string modulename,int slot)
 721 {
 722         unsigned int v2 = 256;
 723         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 724         {
 725                 if (Config->module_names[v] == modulename)
 726                 {
 727                         // found an instance, swap it with the item at the end
 728                         v2 = v;
 729                         break;
 730                 }
 731         }
 732         if ((v2 != (unsigned int)slot) && (v2 < 256))
 733         {
 734                 // Swap the module names over
 735                 Config->module_names[v2] = Config->module_names[slot];
 736                 Config->module_names[slot] = modulename;
 737                 // now swap the module factories
 738                 ircd_module* temp = factory[v2];
 739                 factory[v2] = factory[slot];
 740                 factory[slot] = temp;
 741                 // now swap the module objects
 742                 Module* temp_module = modules[v2];
 743                 modules[v2] = modules[slot];
 744                 modules[slot] = temp_module;
 745                 // now swap the implement lists (we dont
 746                 // need to swap the global or recount it)
 747                 for (int n = 0; n < 255; n++)
 748                 {
 749                         char x = Config->implement_lists[v2][n];
 750                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 751                         Config->implement_lists[slot][n] = x;
 752                 }
 753         }
 754 }
 755
 756 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 757 {
 758         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 759         {
 760                 if (Config->module_names[v] == after)
 761                 {
 762                         MoveTo(modulename, v);
 763                         return;
 764                 }
 765         }
 766 }
 767
 768 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 769 {
 770         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 771         {
 772                 if (Config->module_names[v] == before)
 773                 {
 774                         if (v > 0)
 775                         {
 776                                 MoveTo(modulename, v-1);
 777                         }
 778                         else
 779                         {
 780                                 MoveTo(modulename, v);
 781                         }
 782                         return;
 783                 }
 784         }
 785 }
 786
 787 void InspIRCd::MoveToFirst(std::string modulename)
 788 {
 789         MoveTo(modulename,0);
 790 }
 791
 792 void InspIRCd::MoveToLast(std::string modulename)
 793 {
 794         MoveTo(modulename,this->GetModuleCount());
 795 }
 796
 797 void InspIRCd::BuildISupport()
 798 {
 799         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 800         std::stringstream v;
 801         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES-1 << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << Config->MaxChans << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 802         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 803         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32 ELIST=MU";
 804         Config->data005 = v.str();
 805         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 806         Config->Update005();
 807 }
 808
 809 bool InspIRCd::UnloadModule(const char* filename)
 810 {
 811         std::string filename_str = filename;
 812         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 813         {
 814                 if (Config->module_names[j] == filename_str)
 815                 {
 816                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 817                         {
 818                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 819                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 820                                 return false;
 821                         }
 822                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 823                         if (intercount.first > 0)
 824                         {
 825                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 826                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 827                                                 intercount.first,
 828                                                 intercount.first > 1 ? "s" : "",
 829                                                 intercount.first > 1 ? "are" : "is",
 830                                                 intercount.second.c_str());
 831                                 return false;
 832                         }
 833                         /* Give the module a chance to tidy out all its metadata */
 834                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 835                         {
 836                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 837                         }
 838                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 839                         {
 840                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 841                         }
 842
 843                         /* Tidy up any dangling resolvers */
 844                         this->Res->CleanResolvers(modules[j]);
 845
 846                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 847
 848                         for(int t = 0; t < 255; t++)
 849                         {
 850                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 851                         }
 852
 853                         /* We have to renumber implement_lists after unload because the module numbers change!
 854                          */
 855                         for(int j2 = j; j2 < 254; j2++)
 856                         {
 857                                 for(int t = 0; t < 255; t++)
 858                                 {
 859                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 860                                 }
 861                         }
 862
 863                         // found the module
 864                         Parser->RemoveCommands(filename);
 865                         this->EraseModule(j);
 866                         this->EraseFactory(j);
 867                         this->Log(DEFAULT,"Module %s unloaded",filename);
 868                         this->ModCount--;
 869                         BuildISupport();
 870                         return true;
 871                 }
 872         }
 873         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 874         snprintf(MODERR,MAXBUF,"Module not loaded");
 875         return false;
 876 }
 877
 878 bool InspIRCd::LoadModule(const char* filename)
 879 {
 880         /* Do we have a glob pattern in the filename?
 881          * The user wants to load multiple modules which
 882          * match the pattern.
 883          */
 884         if (strchr(filename,'*') || (strchr(filename,'?')))
 885         {
 886                 int n_match = 0;
 887                 DIR* library = opendir(Config->ModPath);
 888                 if (library)
 889                 {
 890                         /* Try and locate and load all modules matching the pattern */
 891                         dirent* entry = NULL;
 892                         while ((entry = readdir(library)))
 893                         {
 894                                 if (this->MatchText(entry->d_name, filename))
 895                                 {
 896                                         if (!this->LoadModule(entry->d_name))
 897                                                 n_match++;
 898                                 }
 899                         }
 900                         closedir(library);
 901                 }
 902                 /* Loadmodule will now return false if any one of the modules failed
 903                  * to load (but wont abort when it encounters a bad one) and when 1 or
 904                  * more modules were actually loaded.
 905                  */
 906                 return (n_match > 0);
 907         }
 908
 909         char modfile[MAXBUF];
 910         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 911         std::string filename_str = filename;
 912
 913         if (!ServerConfig::DirValid(modfile))
 914         {
 915                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 916                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 917                 return false;
 918         }
 919         if (ServerConfig::FileExists(modfile))
 920         {
 921
 922                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 923                 {
 924                         if (Config->module_names[j] == filename_str)
 925                         {
 926                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 927                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 928                                 return false;
 929                         }
 930                 }
 931                 try
 932                 {
 933                         ircd_module* a = new ircd_module(this, modfile);
 934                         factory[this->ModCount+1] = a;
 935                         if (factory[this->ModCount+1]->LastError())
 936                         {
 937                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 938                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 939                                 return false;
 940                         }
 941                         if ((long)factory[this->ModCount+1]->factory != -1)
 942                         {
 943                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 944
 945                                 Version v = m->GetVersion();
 946
 947                                 if (v.API != API_VERSION)
 948                                 {
 949                                         delete m;
 950                                         delete a;
 951                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 952                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 953                                         return false;
 954                                 }
 955                                 else
 956                                 {
 957                                         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]"));
 958                                 }
 959
 960                                 modules[this->ModCount+1] = m;
 961                                 /* save the module and the module's classfactory, if
 962                                  * this isnt done, random crashes can occur :/ */
 963                                 Config->module_names.push_back(filename);
 964
 965                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 966                                 for(int t = 0; t < 255; t++)
 967                                         x[t] = 0;
 968
 969                                 modules[this->ModCount+1]->Implements(x);
 970
 971                                 for(int t = 0; t < 255; t++)
 972                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 973                         }
 974                         else
 975                         {
 976                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 977                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 978                                 return false;
 979                         }
 980                 }
 981                 catch (CoreException& modexcept)
 982                 {
 983                         this->Log(DEFAULT,"Unable to load %s: %s",modfile,modexcept.GetReason());
 984                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 985                         return false;
 986                 }
 987         }
 988         else
 989         {
 990                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 991                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 992                 return false;
 993         }
 994         this->ModCount++;
 995         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 996         // now work out which modules, if any, want to move to the back of the queue,
 997         // and if they do, move them there.
 998         std::vector<std::string> put_to_back;
 999         std::vector<std::string> put_to_front;
1000         std::map<std::string,std::string> put_before;
1001         std::map<std::string,std::string> put_after;
1002         for (unsigned int j = 0; j < Config->module_names.size(); j++)
1003         {
1004                 if (modules[j]->Prioritize() == PRIORITY_LAST)
1005                         put_to_back.push_back(Config->module_names[j]);
1006                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
1007                         put_to_front.push_back(Config->module_names[j]);
1008                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
1009                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
1010                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
1011                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
1012         }
1013         for (unsigned int j = 0; j < put_to_back.size(); j++)
1014                 MoveToLast(put_to_back[j]);
1015         for (unsigned int j = 0; j < put_to_front.size(); j++)
1016                 MoveToFirst(put_to_front[j]);
1017         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
1018                 MoveBefore(j->first,j->second);
1019         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
1020                 MoveAfter(j->first,j->second);
1021         BuildISupport();
1022         return true;
1023 }
1024
1025 void InspIRCd::DoOneIteration(bool process_module_sockets)
1026 {
1027 #ifndef WIN32
1028         static rusage ru;
1029 #else
1030         static time_t uptime;
1031         static struct tm * stime;
1032         static char window_title[100];
1033 #endif
1034
1035         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
1036          * Once per loop iteration is pleanty.
1037          */
1038         OLDTIME = TIME;
1039         TIME = time(NULL);
1040
1041         /* Run background module timers every few seconds
1042          * (the docs say modules shouldnt rely on accurate
1043          * timing using this event, so we dont have to
1044          * time this exactly).
1045          */
1046         if (TIME != OLDTIME)
1047         {
1048                 if (TIME < OLDTIME)
1049                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
1050                 if ((TIME % 3600) == 0)
1051                 {
1052                         this->RehashUsersAndChans();
1053                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
1054                 }
1055                 Timers->TickTimers(TIME);
1056                 this->DoBackgroundUserStuff(TIME);
1057
1058                 if ((TIME % 5) == 0)
1059                 {
1060                         XLines->expire_lines();
1061                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
1062                         Timers->TickMissedTimers(TIME);
1063                 }
1064 #ifndef WIN32
1065                 /* Same change as in cmd_stats.cpp, use RUSAGE_SELF rather than '0' -- Om */
1066                 if (!getrusage(RUSAGE_SELF, &ru))
1067                 {
1068                         gettimeofday(&this->stats->LastSampled, NULL);
1069                         this->stats->LastCPU = ru.ru_utime;
1070                 }
1071 #else
1072                 CheckIPC(this);
1073
1074                 if(Config->nofork)
1075                 {
1076                         uptime = Time() - startup_time;
1077                         stime = gmtime(&uptime);
1078                         snprintf(window_title, 100, "InspIRCd - %u clients, %u accepted connections - Up %u days, %.2u:%.2u:%.2u",
1079                                 LocalUserCount(), stats->statsAccept, stime->tm_yday, stime->tm_hour, stime->tm_min, stime->tm_sec);
1080                         SetConsoleTitle(window_title);
1081                 }
1082 #endif
1083         }
1084
1085         /* Call the socket engine to wait on the active
1086          * file descriptors. The socket engine has everything's
1087          * descriptors in its list... dns, modules, users,
1088          * servers... so its nice and easy, just one call.
1089          * This will cause any read or write events to be
1090          * dispatched to their handlers.
1091          */
1092         SE->DispatchEvents();
1093
1094         /* if any users was quit, take them out */
1095         GlobalCulls.Apply();
1096
1097         /* If any inspsockets closed, remove them */
1098         for (std::map<InspSocket*,InspSocket*>::iterator x = SocketCull.begin(); x != SocketCull.end(); ++x)
1099         {
1100                 SE->DelFd(x->second);
1101                 x->second->Close();
1102                 delete x->second;
1103         }
1104         SocketCull.clear();
1105 }
1106
1107 int InspIRCd::Run()
1108 {
1109         while (true)
1110         {
1111                 DoOneIteration(true);
1112         }
1113         /* This is never reached -- we hope! */
1114         return 0;
1115 }
1116
1117 /**********************************************************************************/
1118
1119 /**
1120  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
1121  */
1122
1123 int main(int argc, char** argv)
1124 {
1125         SI = new InspIRCd(argc, argv);
1126         SI->Run();
1127         delete SI;
1128         return 0;
1129 }
1130
1131 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
1132  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
1133  * registration timeout maximum seconds)
1134  */
1135 bool InspIRCd::AllModulesReportReady(userrec* user)
1136 {
1137         if (!Config->global_implementation[I_OnCheckReady])
1138                 return true;
1139
1140         for (int i = 0; i <= this->GetModuleCount(); i++)
1141         {
1142                 if (Config->implement_lists[i][I_OnCheckReady])
1143                 {
1144                         int res = modules[i]->OnCheckReady(user);
1145                         if (!res)
1146                                 return false;
1147                 }
1148         }
1149         return true;
1150 }
1151
1152 int InspIRCd::GetModuleCount()
1153 {
1154         return this->ModCount;
1155 }
1156
1157 time_t InspIRCd::Time(bool delta)
1158 {
1159         if (delta)
1160                 return TIME + time_delta;
1161         return TIME;
1162 }
1163
1164 int InspIRCd::SetTimeDelta(int delta)
1165 {
1166         int old = time_delta;
1167         time_delta = delta;
1168         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
1169         return old;
1170 }
1171
1172 void InspIRCd::AddLocalClone(userrec* user)
1173 {
1174         clonemap::iterator x = local_clones.find(user->GetIPString());
1175         if (x != local_clones.end())
1176                 x->second++;
1177         else
1178                 local_clones[user->GetIPString()] = 1;
1179 }
1180
1181 void InspIRCd::AddGlobalClone(userrec* user)
1182 {
1183         clonemap::iterator y = global_clones.find(user->GetIPString());
1184         if (y != global_clones.end())
1185                 y->second++;
1186         else
1187                 global_clones[user->GetIPString()] = 1;
1188 }
1189
1190 int InspIRCd::GetTimeDelta()
1191 {
1192         return time_delta;
1193 }
1194
1195 bool FileLogger::Readable()
1196 {
1197         return false;
1198 }
1199
1200 void FileLogger::HandleEvent(EventType et, int errornum)
1201 {
1202         this->WriteLogLine("");
1203         if (log)
1204                 ServerInstance->SE->DelFd(this);
1205 }
1206
1207 void FileLogger::WriteLogLine(const std::string &line)
1208 {
1209         if (line.length())
1210                 buffer.append(line);
1211
1212         if (log)
1213         {
1214                 int written = fprintf(log,"%s",buffer.c_str());
1215 #ifdef WINDOWS
1216                 buffer = "";
1217 #else
1218                 if ((written >= 0) && (written < (int)buffer.length()))
1219                 {
1220                         buffer.erase(0, buffer.length());
1221                         ServerInstance->SE->AddFd(this);
1222                 }
1223                 else if (written == -1)
1224                 {
1225                         if (errno == EAGAIN)
1226                                 ServerInstance->SE->AddFd(this);
1227                 }
1228                 else
1229                 {
1230                         /* Wrote the whole buffer, and no need for write callback */
1231                         buffer = "";
1232                 }
1233 #endif
1234                 if (writeops++ % 20)
1235                 {
1236                         fflush(log);
1237                 }
1238         }
1239 }
1240
1241 void FileLogger::Close()
1242 {
1243         if (log)
1244         {
1245                 /* Burlex: Windows assumes nonblocking on FILE* pointers anyway, and also "file" fd's aren't the same
1246                  * as socket fd's. */
1247 #ifndef WIN32
1248                 int flags = fcntl(fileno(log), F_GETFL, 0);
1249                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
1250 #endif
1251                 if (buffer.size())
1252                         fprintf(log,"%s",buffer.c_str());
1253
1254 #ifndef WINDOWS
1255                 ServerInstance->SE->DelFd(this);
1256 #endif
1257
1258                 fflush(log);
1259                 fclose(log);
1260         }
1261
1262         buffer = "";
1263 }
1264
1265 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
1266 {
1267         if (log)
1268         {
1269                 irc::sockets::NonBlocking(fileno(log));
1270                 this->SetFd(fileno(log));
1271                 buffer = "";
1272         }
1273 }
1274
1275 FileLogger::~FileLogger()
1276 {
1277         this->Close();
1278 }
1279