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