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