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         return ExitCode;
 104 }
 105
 106 void WindowsForkKillOwner(InspIRCd * Instance)
 107 {
 108         HANDLE hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, owner_processid);
 109         if(!hProcess || !owner_processid)
 110                 Instance->Exit(14);
 111
 112         // die die die
 113         if(!TerminateProcess(hProcess, 0))
 114                 Instance->Exit(14);
 115
 116         CloseHandle(hProcess);
 117 }
 118
 119 #endif
 120
 121 using irc::sockets::NonBlocking;
 122 using irc::sockets::Blocking;
 123 using irc::sockets::insp_ntoa;
 124 using irc::sockets::insp_inaddr;
 125 using irc::sockets::insp_sockaddr;
 126
 127 InspIRCd* SI = NULL;
 128
 129 /* Burlex: Moved from exitcodes.h -- due to duplicate symbols */
 130 const char* ExitCodes[] =
 131 {
 132                 "No error", /* 0 */
 133                 "DIE command", /* 1 */
 134                 "execv() failed", /* 2 */
 135                 "Internal error", /* 3 */
 136                 "Config file error", /* 4 */
 137                 "Logfile error", /* 5 */
 138                 "Fork failed", /* 6 */
 139                 "Bad commandline parameters", /* 7 */
 140                 "No ports could be bound", /* 8 */
 141                 "Can't write PID file", /* 9 */
 142                 "SocketEngine could not initialize", /* 10 */
 143                 "Refusing to start up as root", /* 11 */
 144                 "Found a <die> tag!", /* 12 */
 145                 "Couldn't load module on startup", /* 13 */
 146                 "Could not create forked process", /* 14 */
 147                 "Received SIGTERM", /* 15 */
 148 };
 149
 150 void InspIRCd::AddServerName(const std::string &servername)
 151 {
 152         servernamelist::iterator itr = servernames.begin();
 153         for(; itr != servernames.end(); ++itr)
 154                 if(**itr == servername)
 155                         return;
 156
 157         string * ns = new string(servername);
 158         servernames.push_back(ns);
 159 }
 160
 161 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
 162 {
 163         servernamelist::iterator itr = servernames.begin();
 164         for(; itr != servernames.end(); ++itr)
 165                 if(**itr == servername)
 166                         return (*itr)->c_str();
 167
 168         servernames.push_back(new string(servername));
 169         itr = --servernames.end();
 170         return (*itr)->c_str();
 171 }
 172
 173 bool InspIRCd::FindServerName(const std::string &servername)
 174 {
 175         servernamelist::iterator itr = servernames.begin();
 176         for(; itr != servernames.end(); ++itr)
 177                 if(**itr == servername)
 178                         return true;
 179         return false;
 180 }
 181
 182 void InspIRCd::Exit(int status)
 183 {
 184 #ifdef WINDOWS
 185         CloseIPC();
 186 #endif
 187         if (SI)
 188         {
 189                 SI->SendError("Exiting with status " + ConvToStr(status) + " (" + std::string(ExitCodes[status]) + ")");
 190                 SI->Cleanup();
 191         }
 192         exit (status);
 193 }
 194
 195 void InspIRCd::Cleanup()
 196 {
 197         std::vector<std::string> mymodnames;
 198         int MyModCount = this->GetModuleCount();
 199
 200         for (unsigned int i = 0; i < Config->ports.size(); i++)
 201         {
 202                 /* This calls the constructor and closes the listening socket */
 203                 delete Config->ports[i];
 204         }
 205
 206         Config->ports.clear();
 207
 208         /* Close all client sockets, or the new process inherits them */
 209         for (std::vector<userrec*>::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
 210         {
 211                 (*i)->SetWriteError("Server shutdown");
 212                 (*i)->CloseSocket();
 213         }
 214
 215         /* We do this more than once, so that any service providers get a
 216          * chance to be unhooked by the modules using them, but then get
 217          * a chance to be removed themsleves.
 218          */
 219         for (int tries = 0; tries < 3; tries++)
 220         {
 221                 MyModCount = this->GetModuleCount();
 222                 mymodnames.clear();
 223
 224                 /* Unload all modules, so they get a chance to clean up their listeners */
 225                 for (int j = 0; j <= MyModCount; j++)
 226                         mymodnames.push_back(Config->module_names[j]);
 227
 228                 for (int k = 0; k <= MyModCount; k++)
 229                         this->UnloadModule(mymodnames[k].c_str());
 230         }
 231
 232         /* Close logging */
 233         this->Logger->Close();
 234
 235         /* Cleanup Server Names */
 236         for(servernamelist::iterator itr = servernames.begin(); itr != servernames.end(); ++itr)
 237                 delete (*itr);
 238
 239 #ifdef WINDOWS
 240         /* WSACleanup */
 241         WSACleanup();
 242 #endif
 243 }
 244
 245 void InspIRCd::Restart(const std::string &reason)
 246 {
 247         /* SendError flushes each client's queue,
 248          * regardless of writeability state
 249          */
 250         this->SendError(reason);
 251
 252         this->Cleanup();
 253
 254         /* Figure out our filename (if theyve renamed it, we're boned) */
 255         std::string me;
 256
 257 #ifdef WINDOWS
 258         char module[MAX_PATH];
 259         if (GetModuleFileName(NULL, module, MAX_PATH))
 260                 me = module;
 261 #else
 262         me = Config->MyDir + "/inspircd";
 263 #endif
 264
 265         if (execv(me.c_str(), Config->argv) == -1)
 266         {
 267                 /* Will raise a SIGABRT if not trapped */
 268                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 269         }
 270 }
 271
 272 void InspIRCd::Start()
 273 {
 274         printf_c("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 275         printf_c("(C) InspIRCd Development Team.\033[0m\n\n");
 276         printf_c("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey, Burlex\033[0m\n");
 277         printf_c("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 278 }
 279
 280 void InspIRCd::Rehash(int status)
 281 {
 282         SI->WriteOpers("*** Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(SI->ConfigFileName));
 283         SI->CloseLog();
 284         SI->OpenLog(SI->Config->argv, SI->Config->argc);
 285         SI->RehashUsersAndChans();
 286         FOREACH_MOD_I(SI, I_OnGarbageCollect, OnGarbageCollect());
 287         SI->Config->Read(false,NULL);
 288         SI->ResetMaxBans();
 289         SI->Res->Rehash();
 290         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(NULL,""));
 291         SI->BuildISupport();
 292 }
 293
 294 void InspIRCd::ResetMaxBans()
 295 {
 296         for (chan_hash::const_iterator i = chanlist->begin(); i != chanlist->end(); i++)
 297                 i->second->ResetMaxBans();
 298 }
 299
 300
 301 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 302  * we must occasionally rehash the hash (yes really).
 303  * We do this by copying the entries from the old hash to a new hash, causing all
 304  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 305  * very expensive, so instead we do it when the user types /REHASH and expects a
 306  * short delay anyway.
 307  */
 308 void InspIRCd::RehashUsersAndChans()
 309 {
 310         user_hash* old_users = this->clientlist;
 311         chan_hash* old_chans = this->chanlist;
 312
 313         this->clientlist = new user_hash();
 314         this->chanlist = new chan_hash();
 315
 316         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 317                 this->clientlist->insert(*n);
 318
 319         delete old_users;
 320
 321         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 322                 this->chanlist->insert(*n);
 323
 324         delete old_chans;
 325 }
 326
 327 void InspIRCd::CloseLog()
 328 {
 329         this->Logger->Close();
 330 }
 331
 332 void InspIRCd::SetSignals()
 333 {
 334 #ifndef WIN32
 335         signal(SIGALRM, SIG_IGN);
 336         signal(SIGHUP, InspIRCd::Rehash);
 337         signal(SIGPIPE, SIG_IGN);
 338         signal(SIGCHLD, SIG_IGN);
 339 #endif
 340         signal(SIGTERM, InspIRCd::Exit);
 341 }
 342
 343 void InspIRCd::QuickExit(int status)
 344 {
 345         exit(0);
 346 }
 347
 348 bool InspIRCd::DaemonSeed()
 349 {
 350 #ifdef WINDOWS
 351         return true;
 352 #else
 353         signal(SIGTERM, InspIRCd::QuickExit);
 354
 355         int childpid;
 356         if ((childpid = fork ()) < 0)
 357                 return false;
 358         else if (childpid > 0)
 359         {
 360                 /* We wait here for the child process to kill us,
 361                  * so that the shell prompt doesnt come back over
 362                  * the output.
 363                  * Sending a kill with a signal of 0 just checks
 364                  * if the child pid is still around. If theyre not,
 365                  * they threw an error and we should give up.
 366                  */
 367                 while (kill(childpid, 0) != -1)
 368                         sleep(1);
 369                 exit(0);
 370         }
 371         setsid ();
 372         umask (007);
 373         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 374
 375         signal(SIGTERM, InspIRCd::Exit);
 376
 377         rlimit rl;
 378         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 379         {
 380                 this->Log(DEFAULT,"Failed to getrlimit()!");
 381                 return false;
 382         }
 383         else
 384         {
 385                 rl.rlim_cur = rl.rlim_max;
 386                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 387                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 388         }
 389
 390         return true;
 391 #endif
 392 }
 393
 394 void InspIRCd::WritePID(const std::string &filename)
 395 {
 396         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 397         if (*(fname.begin()) != '/')
 398         {
 399                 std::string::size_type pos;
 400                 std::string confpath = this->ConfigFileName;
 401                 if ((pos = confpath.rfind("/")) != std::string::npos)
 402                 {
 403                         /* Leaves us with just the path */
 404                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 405                 }
 406         }
 407         std::ofstream outfile(fname.c_str());
 408         if (outfile.is_open())
 409         {
 410                 outfile << getpid();
 411                 outfile.close();
 412         }
 413         else
 414         {
 415                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 416                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 417                 Exit(EXIT_STATUS_PID);
 418         }
 419 }
 420
 421 std::string InspIRCd::GetRevision()
 422 {
 423         return REVISION;
 424 }
 425
 426 InspIRCd::InspIRCd(int argc, char** argv)
 427         : ModCount(-1), GlobalCulls(this)
 428 {
 429         int found_ports = 0;
 430         FailedPortList pl;
 431         int do_version = 0, do_nofork = 0, do_debug = 0, do_nolog = 0, do_root = 0;    /* flag variables */
 432         char c = 0;
 433
 434         modules.resize(255);
 435         factory.resize(255);
 436         memset(&server, 0, sizeof(server));
 437         memset(&client, 0, sizeof(client));
 438
 439         this->unregistered_count = 0;
 440
 441         this->clientlist = new user_hash();
 442         this->chanlist = new chan_hash();
 443
 444         this->Config = new ServerConfig(this);
 445
 446         this->Config->argv = argv;
 447         this->Config->argc = argc;
 448
 449         chdir(Config->GetFullProgDir().c_str());
 450
 451         this->Config->opertypes.clear();
 452         this->Config->operclass.clear();
 453         this->SNO = new SnomaskManager(this);
 454         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 455         this->time_delta = 0;
 456         this->next_call = this->TIME + 3;
 457         srand(this->TIME);
 458
 459         *this->LogFileName = 0;
 460         strlcpy(this->ConfigFileName, CONFIG_FILE, MAXBUF);
 461
 462         struct option longopts[] =
 463         {
 464                 { "nofork",             no_argument,            &do_nofork,             1       },
 465                 { "logfile",    required_argument,      NULL,                   'f'     },
 466                 { "config",             required_argument,      NULL,                   'c'     },
 467                 { "debug",              no_argument,            &do_debug,              1       },
 468                 { "nolog",              no_argument,            &do_nolog,              1       },
 469                 { "runasroot",  no_argument,            &do_root,               1       },
 470                 { "version",    no_argument,            &do_version,    1       },
 471                 { 0, 0, 0, 0 }
 472         };
 473
 474         while ((c = getopt_long_only(argc, argv, ":f:", longopts, NULL)) != -1)
 475         {
 476                 switch (c)
 477                 {
 478                         case 'f':
 479                                 /* Log filename was set */
 480                                 strlcpy(LogFileName, optarg, MAXBUF);
 481                                 printf("LOG: Setting logfile to %s\n", LogFileName);
 482                         break;
 483                         case 'c':
 484                                 /* Config filename was set */
 485                                 strlcpy(ConfigFileName, optarg, MAXBUF);
 486                                 printf("CONFIG: Setting config file to %s\n", ConfigFileName);
 487                         break;
 488                         case 0:
 489                                 /* getopt_long_only() set an int variable, just keep going */
 490                         break;
 491                         default:
 492                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 493                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>] [--runasroot] [--version] [--config <config>]\n", argv[0]);
 494                                 Exit(EXIT_STATUS_ARGV);
 495                         break;
 496                 }
 497         }
 498
 499         if (do_version)
 500         {
 501                 printf("\n%s r%s\n", VERSION, REVISION);
 502                 Exit(EXIT_STATUS_NOERROR);
 503         }
 504
 505 #ifdef WIN32
 506
 507         // Handle forking
 508         if(!do_nofork && !owner_processid)
 509         {
 510                 DWORD ExitCode = WindowsForkStart(this);
 511                 if(ExitCode)
 512                         Exit(ExitCode);
 513         }
 514
 515         // Set up winsock
 516         WSADATA wsadata;
 517         WSAStartup(MAKEWORD(2,0), &wsadata);
 518
 519 #endif
 520         if (!ServerConfig::FileExists(this->ConfigFileName))
 521         {
 522                 printf("ERROR: Cannot open config file: %s\nExiting...\n", this->ConfigFileName);
 523                 this->Log(DEFAULT,"Unable to open config file %s", this->ConfigFileName);
 524                 Exit(EXIT_STATUS_CONFIG);
 525         }
 526
 527         this->Start();
 528
 529         /* Set the finished argument values */
 530         Config->nofork = do_nofork;
 531         Config->forcedebug = do_debug;
 532         Config->writelog = !do_nolog;
 533
 534         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 535
 536         this->OpenLog(argv, argc);
 537
 538         this->stats = new serverstats();
 539         this->Timers = new TimerManager(this);
 540         this->Parser = new CommandParser(this);
 541         this->XLines = new XLineManager(this);
 542         Config->ClearStack();
 543         Config->Read(true, NULL);
 544
 545         if (!do_root)
 546                 this->CheckRoot();
 547         else
 548         {
 549                 printf("* WARNING * WARNING * WARNING * WARNING * WARNING * \n\n");
 550                 printf("YOU ARE RUNNING INSPIRCD AS ROOT. THIS IS UNSUPPORTED\n");
 551                 printf("AND IF YOU ARE HACKED, CRACKED, SPINDLED OR MUTILATED\n");
 552                 printf("OR ANYTHING ELSE UNEXPECTED HAPPENS TO YOU OR YOUR\n");
 553                 printf("SERVER, THEN IT IS YOUR OWN FAULT. IF YOU DID NOT MEAN\n");
 554                 printf("TO START INSPIRCD AS ROOT, HIT CTRL+C NOW AND RESTART\n");
 555                 printf("THE PROGRAM AS A NORMAL USER. YOU HAVE BEEN WARNED!\n");
 556                 printf("\nInspIRCd starting in 20 seconds, ctrl+c to abort...\n");
 557                 sleep(20);
 558         }
 559
 560         this->SetSignals();
 561
 562         if (!Config->nofork)
 563         {
 564                 if (!this->DaemonSeed())
 565                 {
 566                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 567                         Log(DEFAULT,"ERROR: could not go into daemon mode. Shutting down.");
 568                         Exit(EXIT_STATUS_FORK);
 569                 }
 570         }
 571
 572
 573         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 574          * initialize the socket engine.
 575          */
 576         SocketEngineFactory* SEF = new SocketEngineFactory();
 577         SE = SEF->Create(this);
 578         delete SEF;
 579
 580         this->Modes = new ModeParser(this);
 581         this->AddServerName(Config->ServerName);
 582         CheckDie();
 583         int bounditems = BindPorts(true, found_ports, pl);
 584
 585         for(int t = 0; t < 255; t++)
 586                 Config->global_implementation[t] = 0;
 587
 588         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 589
 590         printf("\n");
 591
 592         this->Res = new DNS(this);
 593
 594         this->LoadAllModules();
 595         /* Just in case no modules were loaded - fix for bug #101 */
 596         this->BuildISupport();
 597         InitializeDisabledCommands(Config->DisabledCommands, this);
 598
 599         if ((Config->ports.size() == 0) && (found_ports > 0))
 600         {
 601                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 602                 Log(DEFAULT,"ERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?");
 603                 Exit(EXIT_STATUS_BIND);
 604         }
 605
 606         if (Config->ports.size() != (unsigned int)found_ports)
 607         {
 608                 printf("\nWARNING: Not all your client ports could be bound --\nstarting anyway with %d of %d client ports bound.\n\n", bounditems, found_ports);
 609                 printf("The following port(s) failed to bind:\n");
 610                 int j = 1;
 611                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 612                 {
 613                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 614                 }
 615         }
 616 #ifndef WINDOWS
 617         if (!Config->nofork)
 618         {
 619                 if (kill(getppid(), SIGTERM) == -1)
 620                 {
 621                         printf("Error killing parent process: %s\n",strerror(errno));
 622                         Log(DEFAULT,"Error killing parent process: %s",strerror(errno));
 623                 }
 624         }
 625
 626         if (isatty(0) && isatty(1) && isatty(2))
 627         {
 628                 /* We didn't start from a TTY, we must have started from a background process -
 629                  * e.g. we are restarting, or being launched by cron. Dont kill parent, and dont
 630                  * close stdin/stdout
 631                  */
 632                 if (!do_nofork)
 633                 {
 634                         fclose(stdin);
 635                         fclose(stderr);
 636                         fclose(stdout);
 637                 }
 638                 else
 639                 {
 640                         Log(DEFAULT,"Keeping pseudo-tty open as we are running in the foreground.");
 641                 }
 642         }
 643 #else
 644         InitIPC();
 645         if(!Config->nofork)
 646         {
 647                 WindowsForkKillOwner(this);
 648                 FreeConsole();
 649         }
 650 #endif
 651         printf("\nInspIRCd is now running!\n");
 652         Log(DEFAULT,"Startup complete.");
 653
 654         this->WritePID(Config->PID);
 655 }
 656
 657 std::string InspIRCd::GetVersionString()
 658 {
 659         char versiondata[MAXBUF];
 660         char dnsengine[] = "singlethread-object";
 661
 662         if (*Config->CustomVersion)
 663         {
 664                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 665         }
 666         else
 667         {
 668                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%s,%s,%s]",VERSION,Config->ServerName,SYSTEM,REVISION,SE->GetName().c_str(),dnsengine);
 669         }
 670         return versiondata;
 671 }
 672
 673 char* InspIRCd::ModuleError()
 674 {
 675         return MODERR;
 676 }
 677
 678 void InspIRCd::EraseFactory(int j)
 679 {
 680         int v = 0;
 681         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 682         {
 683                 if (v == j)
 684                 {
 685                         delete *t;
 686                         factory.erase(t);
 687                         factory.push_back(NULL);
 688                         return;
 689                 }
 690                 v++;
 691         }
 692 }
 693
 694 void InspIRCd::EraseModule(int j)
 695 {
 696         int v1 = 0;
 697         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 698         {
 699                 if (v1 == j)
 700                 {
 701                         DELETE(*m);
 702                         modules.erase(m);
 703                         modules.push_back(NULL);
 704                         break;
 705                 }
 706                 v1++;
 707         }
 708         int v2 = 0;
 709         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 710         {
 711                 if (v2 == j)
 712                 {
 713                         Config->module_names.erase(v);
 714                         break;
 715                 }
 716                 v2++;
 717         }
 718
 719 }
 720
 721 void InspIRCd::MoveTo(std::string modulename,int slot)
 722 {
 723         unsigned int v2 = 256;
 724         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 725         {
 726                 if (Config->module_names[v] == modulename)
 727                 {
 728                         // found an instance, swap it with the item at the end
 729                         v2 = v;
 730                         break;
 731                 }
 732         }
 733         if ((v2 != (unsigned int)slot) && (v2 < 256))
 734         {
 735                 // Swap the module names over
 736                 Config->module_names[v2] = Config->module_names[slot];
 737                 Config->module_names[slot] = modulename;
 738                 // now swap the module factories
 739                 ircd_module* temp = factory[v2];
 740                 factory[v2] = factory[slot];
 741                 factory[slot] = temp;
 742                 // now swap the module objects
 743                 Module* temp_module = modules[v2];
 744                 modules[v2] = modules[slot];
 745                 modules[slot] = temp_module;
 746                 // now swap the implement lists (we dont
 747                 // need to swap the global or recount it)
 748                 for (int n = 0; n < 255; n++)
 749                 {
 750                         char x = Config->implement_lists[v2][n];
 751                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 752                         Config->implement_lists[slot][n] = x;
 753                 }
 754         }
 755 }
 756
 757 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 758 {
 759         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 760         {
 761                 if (Config->module_names[v] == after)
 762                 {
 763                         MoveTo(modulename, v);
 764                         return;
 765                 }
 766         }
 767 }
 768
 769 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 770 {
 771         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 772         {
 773                 if (Config->module_names[v] == before)
 774                 {
 775                         if (v > 0)
 776                         {
 777                                 MoveTo(modulename, v-1);
 778                         }
 779                         else
 780                         {
 781                                 MoveTo(modulename, v);
 782                         }
 783                         return;
 784                 }
 785         }
 786 }
 787
 788 void InspIRCd::MoveToFirst(std::string modulename)
 789 {
 790         MoveTo(modulename,0);
 791 }
 792
 793 void InspIRCd::MoveToLast(std::string modulename)
 794 {
 795         MoveTo(modulename,this->GetModuleCount());
 796 }
 797
 798 void InspIRCd::BuildISupport()
 799 {
 800         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 801         std::stringstream v;
 802         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES-1 << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << Config->MaxChans << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 803         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 804         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32 ELIST=MU";
 805         Config->data005 = v.str();
 806         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 807         Config->Update005();
 808 }
 809
 810 bool InspIRCd::UnloadModule(const char* filename)
 811 {
 812         std::string filename_str = filename;
 813         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 814         {
 815                 if (Config->module_names[j] == filename_str)
 816                 {
 817                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 818                         {
 819                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 820                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 821                                 return false;
 822                         }
 823                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 824                         if (intercount.first > 0)
 825                         {
 826                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 827                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 828                                                 intercount.first,
 829                                                 intercount.first > 1 ? "s" : "",
 830                                                 intercount.first > 1 ? "are" : "is",
 831                                                 intercount.second.c_str());
 832                                 return false;
 833                         }
 834                         /* Give the module a chance to tidy out all its metadata */
 835                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 836                         {
 837                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 838                         }
 839                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 840                         {
 841                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 842                         }
 843
 844                         /* Tidy up any dangling resolvers */
 845                         this->Res->CleanResolvers(modules[j]);
 846
 847                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 848
 849                         for(int t = 0; t < 255; t++)
 850                         {
 851                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 852                         }
 853
 854                         /* We have to renumber implement_lists after unload because the module numbers change!
 855                          */
 856                         for(int j2 = j; j2 < 254; j2++)
 857                         {
 858                                 for(int t = 0; t < 255; t++)
 859                                 {
 860                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 861                                 }
 862                         }
 863
 864                         // found the module
 865                         Parser->RemoveCommands(filename);
 866                         this->EraseModule(j);
 867                         this->EraseFactory(j);
 868                         this->Log(DEFAULT,"Module %s unloaded",filename);
 869                         this->ModCount--;
 870                         BuildISupport();
 871                         return true;
 872                 }
 873         }
 874         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 875         snprintf(MODERR,MAXBUF,"Module not loaded");
 876         return false;
 877 }
 878
 879 bool InspIRCd::LoadModule(const char* filename)
 880 {
 881         /* Do we have a glob pattern in the filename?
 882          * The user wants to load multiple modules which
 883          * match the pattern.
 884          */
 885         if (strchr(filename,'*') || (strchr(filename,'?')))
 886         {
 887                 int n_match = 0;
 888                 DIR* library = opendir(Config->ModPath);
 889                 if (library)
 890                 {
 891                         /* Try and locate and load all modules matching the pattern */
 892                         dirent* entry = NULL;
 893                         while ((entry = readdir(library)))
 894                         {
 895                                 if (this->MatchText(entry->d_name, filename))
 896                                 {
 897                                         if (!this->LoadModule(entry->d_name))
 898                                                 n_match++;
 899                                 }
 900                         }
 901                         closedir(library);
 902                 }
 903                 /* Loadmodule will now return false if any one of the modules failed
 904                  * to load (but wont abort when it encounters a bad one) and when 1 or
 905                  * more modules were actually loaded.
 906                  */
 907                 return (n_match > 0);
 908         }
 909
 910         char modfile[MAXBUF];
 911         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 912         std::string filename_str = filename;
 913
 914         if (!ServerConfig::DirValid(modfile))
 915         {
 916                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 917                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 918                 return false;
 919         }
 920         if (ServerConfig::FileExists(modfile))
 921         {
 922
 923                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 924                 {
 925                         if (Config->module_names[j] == filename_str)
 926                         {
 927                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 928                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 929                                 return false;
 930                         }
 931                 }
 932                 try
 933                 {
 934                         ircd_module* a = new ircd_module(this, modfile);
 935                         factory[this->ModCount+1] = a;
 936                         if (factory[this->ModCount+1]->LastError())
 937                         {
 938                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 939                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 940                                 return false;
 941                         }
 942                         if ((long)factory[this->ModCount+1]->factory != -1)
 943                         {
 944                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 945
 946                                 Version v = m->GetVersion();
 947
 948                                 if (v.API != API_VERSION)
 949                                 {
 950                                         delete m;
 951                                         delete a;
 952                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 953                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 954                                         return false;
 955                                 }
 956                                 else
 957                                 {
 958                                         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]"));
 959                                 }
 960
 961                                 modules[this->ModCount+1] = m;
 962                                 /* save the module and the module's classfactory, if
 963                                  * this isnt done, random crashes can occur :/ */
 964                                 Config->module_names.push_back(filename);
 965
 966                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 967                                 for(int t = 0; t < 255; t++)
 968                                         x[t] = 0;
 969
 970                                 modules[this->ModCount+1]->Implements(x);
 971
 972                                 for(int t = 0; t < 255; t++)
 973                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 974                         }
 975                         else
 976                         {
 977                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 978                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 979                                 return false;
 980                         }
 981                 }
 982                 catch (CoreException& modexcept)
 983                 {
 984                         this->Log(DEFAULT,"Unable to load %s: %s",modfile,modexcept.GetReason());
 985                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 986                         return false;
 987                 }
 988         }
 989         else
 990         {
 991                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 992                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 993                 return false;
 994         }
 995         this->ModCount++;
 996         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 997         // now work out which modules, if any, want to move to the back of the queue,
 998         // and if they do, move them there.
 999         std::vector<std::string> put_to_back;
1000         std::vector<std::string> put_to_front;
1001         std::map<std::string,std::string> put_before;
1002         std::map<std::string,std::string> put_after;
1003         for (unsigned int j = 0; j < Config->module_names.size(); j++)
1004         {
1005                 if (modules[j]->Prioritize() == PRIORITY_LAST)
1006                         put_to_back.push_back(Config->module_names[j]);
1007                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
1008                         put_to_front.push_back(Config->module_names[j]);
1009                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
1010                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
1011                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
1012                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
1013         }
1014         for (unsigned int j = 0; j < put_to_back.size(); j++)
1015                 MoveToLast(put_to_back[j]);
1016         for (unsigned int j = 0; j < put_to_front.size(); j++)
1017                 MoveToFirst(put_to_front[j]);
1018         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
1019                 MoveBefore(j->first,j->second);
1020         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
1021                 MoveAfter(j->first,j->second);
1022         BuildISupport();
1023         return true;
1024 }
1025
1026 void InspIRCd::DoOneIteration(bool process_module_sockets)
1027 {
1028 #ifndef WIN32
1029         static rusage ru;
1030 #else
1031         static time_t uptime;
1032         static struct tm * stime;
1033         static char window_title[100];
1034 #endif
1035
1036         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
1037          * Once per loop iteration is pleanty.
1038          */
1039         OLDTIME = TIME;
1040         TIME = time(NULL);
1041
1042         /* Run background module timers every few seconds
1043          * (the docs say modules shouldnt rely on accurate
1044          * timing using this event, so we dont have to
1045          * time this exactly).
1046          */
1047         if (TIME != OLDTIME)
1048         {
1049                 if (TIME < OLDTIME)
1050                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
1051                 if ((TIME % 3600) == 0)
1052                 {
1053                         this->RehashUsersAndChans();
1054                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
1055                 }
1056                 Timers->TickTimers(TIME);
1057                 this->DoBackgroundUserStuff(TIME);
1058
1059                 if ((TIME % 5) == 0)
1060                 {
1061                         XLines->expire_lines();
1062                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
1063                         Timers->TickMissedTimers(TIME);
1064                 }
1065 #ifndef WIN32
1066                 /* Same change as in cmd_stats.cpp, use RUSAGE_SELF rather than '0' -- Om */
1067                 if (!getrusage(RUSAGE_SELF, &ru))
1068                 {
1069                         gettimeofday(&this->stats->LastSampled, NULL);
1070                         this->stats->LastCPU = ru.ru_utime;
1071                 }
1072 #else
1073                 CheckIPC(this);
1074
1075                 if(Config->nofork)
1076                 {
1077                         uptime = Time() - startup_time;
1078                         stime = gmtime(&uptime);
1079                         snprintf(window_title, 100, "InspIRCd - %u clients, %u accepted connections - Up %u days, %.2u:%.2u:%.2u",
1080                                 LocalUserCount(), stats->statsAccept, stime->tm_yday, stime->tm_hour, stime->tm_min, stime->tm_sec);
1081                         SetConsoleTitle(window_title);
1082                 }
1083 #endif
1084         }
1085
1086         /* Call the socket engine to wait on the active
1087          * file descriptors. The socket engine has everything's
1088          * descriptors in its list... dns, modules, users,
1089          * servers... so its nice and easy, just one call.
1090          * This will cause any read or write events to be
1091          * dispatched to their handlers.
1092          */
1093         SE->DispatchEvents();
1094
1095         /* if any users was quit, take them out */
1096         GlobalCulls.Apply();
1097
1098         /* If any inspsockets closed, remove them */
1099         for (std::map<InspSocket*,InspSocket*>::iterator x = SocketCull.begin(); x != SocketCull.end(); ++x)
1100         {
1101                 SE->DelFd(x->second);
1102                 x->second->Close();
1103                 delete x->second;
1104         }
1105         SocketCull.clear();
1106 }
1107
1108 int InspIRCd::Run()
1109 {
1110         while (true)
1111         {
1112                 DoOneIteration(true);
1113         }
1114         /* This is never reached -- we hope! */
1115         return 0;
1116 }
1117
1118 /**********************************************************************************/
1119
1120 /**
1121  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
1122  */
1123
1124 int main(int argc, char** argv)
1125 {
1126         SI = new InspIRCd(argc, argv);
1127         SI->Run();
1128         delete SI;
1129         return 0;
1130 }
1131
1132 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
1133  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
1134  * registration timeout maximum seconds)
1135  */
1136 bool InspIRCd::AllModulesReportReady(userrec* user)
1137 {
1138         if (!Config->global_implementation[I_OnCheckReady])
1139                 return true;
1140
1141         for (int i = 0; i <= this->GetModuleCount(); i++)
1142         {
1143                 if (Config->implement_lists[i][I_OnCheckReady])
1144                 {
1145                         int res = modules[i]->OnCheckReady(user);
1146                         if (!res)
1147                                 return false;
1148                 }
1149         }
1150         return true;
1151 }
1152
1153 int InspIRCd::GetModuleCount()
1154 {
1155         return this->ModCount;
1156 }
1157
1158 time_t InspIRCd::Time(bool delta)
1159 {
1160         if (delta)
1161                 return TIME + time_delta;
1162         return TIME;
1163 }
1164
1165 int InspIRCd::SetTimeDelta(int delta)
1166 {
1167         int old = time_delta;
1168         time_delta = delta;
1169         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
1170         return old;
1171 }
1172
1173 void InspIRCd::AddLocalClone(userrec* user)
1174 {
1175         clonemap::iterator x = local_clones.find(user->GetIPString());
1176         if (x != local_clones.end())
1177                 x->second++;
1178         else
1179                 local_clones[user->GetIPString()] = 1;
1180 }
1181
1182 void InspIRCd::AddGlobalClone(userrec* user)
1183 {
1184         clonemap::iterator y = global_clones.find(user->GetIPString());
1185         if (y != global_clones.end())
1186                 y->second++;
1187         else
1188                 global_clones[user->GetIPString()] = 1;
1189 }
1190
1191 int InspIRCd::GetTimeDelta()
1192 {
1193         return time_delta;
1194 }
1195
1196 bool FileLogger::Readable()
1197 {
1198         return false;
1199 }
1200
1201 void FileLogger::HandleEvent(EventType et, int errornum)
1202 {
1203         this->WriteLogLine("");
1204         if (log)
1205                 ServerInstance->SE->DelFd(this);
1206 }
1207
1208 void FileLogger::WriteLogLine(const std::string &line)
1209 {
1210         if (line.length())
1211                 buffer.append(line);
1212
1213         if (log)
1214         {
1215                 int written = fprintf(log,"%s",buffer.c_str());
1216 #ifdef WINDOWS
1217                 buffer = "";
1218 #else
1219                 if ((written >= 0) && (written < (int)buffer.length()))
1220                 {
1221                         buffer.erase(0, buffer.length());
1222                         ServerInstance->SE->AddFd(this);
1223                 }
1224                 else if (written == -1)
1225                 {
1226                         if (errno == EAGAIN)
1227                                 ServerInstance->SE->AddFd(this);
1228                 }
1229                 else
1230                 {
1231                         /* Wrote the whole buffer, and no need for write callback */
1232                         buffer = "";
1233                 }
1234 #endif
1235                 if (writeops++ % 20)
1236                 {
1237                         fflush(log);
1238                 }
1239         }
1240 }
1241
1242 void FileLogger::Close()
1243 {
1244         if (log)
1245         {
1246                 /* Burlex: Windows assumes nonblocking on FILE* pointers anyway, and also "file" fd's aren't the same
1247                  * as socket fd's. */
1248 #ifndef WIN32
1249                 int flags = fcntl(fileno(log), F_GETFL, 0);
1250                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
1251 #endif
1252                 if (buffer.size())
1253                         fprintf(log,"%s",buffer.c_str());
1254
1255 #ifndef WINDOWS
1256                 ServerInstance->SE->DelFd(this);
1257 #endif
1258
1259                 fflush(log);
1260                 fclose(log);
1261         }
1262
1263         buffer = "";
1264 }
1265
1266 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
1267 {
1268         if (log)
1269         {
1270                 irc::sockets::NonBlocking(fileno(log));
1271                 this->SetFd(fileno(log));
1272                 buffer = "";
1273         }
1274 }
1275
1276 FileLogger::~FileLogger()
1277 {
1278         this->Close();
1279 }
1280