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