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