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         FOREACH_MOD_I(SI, I_OnGarbageCollect, OnGarbageCollect());
 143         SI->Config->Read(false,NULL);
 144         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(""));
 145 }
 146
 147 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 148  * we must occasionally rehash the hash (yes really).
 149  * We do this by copying the entries from the old hash to a new hash, causing all
 150  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 151  * very expensive, so instead we do it when the user types /REHASH and expects a
 152  * short delay anyway.
 153  */
 154 void InspIRCd::RehashUsersAndChans()
 155 {
 156         user_hash* old_users = this->clientlist;
 157         chan_hash* old_chans = this->chanlist;
 158
 159         this->clientlist = new user_hash();
 160         this->chanlist = new chan_hash();
 161
 162         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 163                 this->clientlist->insert(*n);
 164
 165         delete old_users;
 166
 167         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 168                 this->chanlist->insert(*n);
 169
 170         delete old_chans;
 171 }
 172
 173 void InspIRCd::CloseLog()
 174 {
 175         this->Logger->Close();
 176 }
 177
 178 void InspIRCd::SetSignals()
 179 {
 180         signal(SIGALRM, SIG_IGN);
 181         signal(SIGHUP, InspIRCd::Rehash);
 182         signal(SIGPIPE, SIG_IGN);
 183         signal(SIGTERM, InspIRCd::Exit);
 184         signal(SIGCHLD, SIG_IGN);
 185 }
 186
 187 bool InspIRCd::DaemonSeed()
 188 {
 189         int childpid;
 190         if ((childpid = fork ()) < 0)
 191                 return false;
 192         else if (childpid > 0)
 193         {
 194                 /* We wait here for the child process to kill us,
 195                  * so that the shell prompt doesnt come back over
 196                  * the output.
 197                  * Sending a kill with a signal of 0 just checks
 198                  * if the child pid is still around. If theyre not,
 199                  * they threw an error and we should give up.
 200                  */
 201                 while (kill(childpid, 0) != -1)
 202                         sleep(1);
 203                 exit(0);
 204         }
 205         setsid ();
 206         umask (007);
 207         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 208
 209         rlimit rl;
 210         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 211         {
 212                 this->Log(DEFAULT,"Failed to getrlimit()!");
 213                 return false;
 214         }
 215         else
 216         {
 217                 rl.rlim_cur = rl.rlim_max;
 218                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 219                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 220         }
 221
 222         return true;
 223 }
 224
 225 void InspIRCd::WritePID(const std::string &filename)
 226 {
 227         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 228         if (*(fname.begin()) != '/')
 229         {
 230                 std::string::size_type pos;
 231                 std::string confpath = CONFIG_FILE;
 232                 if ((pos = confpath.find("/inspircd.conf")) != std::string::npos)
 233                 {
 234                         /* Leaves us with just the path */
 235                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 236                 }
 237         }
 238         std::ofstream outfile(fname.c_str());
 239         if (outfile.is_open())
 240         {
 241                 outfile << getpid();
 242                 outfile.close();
 243         }
 244         else
 245         {
 246                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 247                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 248                 Exit(EXIT_STATUS_PID);
 249         }
 250 }
 251
 252 std::string InspIRCd::GetRevision()
 253 {
 254         return REVISION;
 255 }
 256
 257 InspIRCd::InspIRCd(int argc, char** argv)
 258         : 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)
 259 {
 260         int found_ports = 0;
 261         FailedPortList pl;
 262
 263         modules.resize(255);
 264         factory.resize(255);
 265
 266         this->clientlist = new user_hash();
 267         this->chanlist = new chan_hash();
 268
 269         this->Config = new ServerConfig(this);
 270
 271         this->Config->argv = argv;
 272         this->Config->argc = argc;
 273
 274         this->Config->opertypes.clear();
 275         this->Config->operclass.clear();
 276         this->SNO = new SnomaskManager(this);
 277         this->Start();
 278         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 279         this->time_delta = 0;
 280         this->next_call = this->TIME + 3;
 281         srand(this->TIME);
 282         this->Log(DEBUG,"*** InspIRCd starting up!");
 283         if (!ServerConfig::FileExists(CONFIG_FILE))
 284         {
 285                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 286                 this->Log(DEFAULT,"main: no config");
 287                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 288                 Exit(EXIT_STATUS_CONFIG);
 289         }
 290         *this->LogFileName = 0;
 291         if (argc > 1) {
 292                 for (int i = 1; i < argc; i++)
 293                 {
 294                         if (!strcmp(argv[i],"-nofork"))
 295                         {
 296                                 Config->nofork = true;
 297                         }
 298                         else if(!strcmp(argv[i],"-debug"))
 299                         {
 300                                 Config->forcedebug = true;
 301                         }
 302                         else if(!strcmp(argv[i],"-nolog"))
 303                         {
 304                                 Config->writelog = false;
 305                         }
 306                         else if (!strcmp(argv[i],"-wait"))
 307                         {
 308                                 sleep(6);
 309                         }
 310                         else if (!strcmp(argv[i],"-logfile"))
 311                         {
 312                                 if (argc > i+1)
 313                                 {
 314                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 315                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 316                                 }
 317                                 else
 318                                 {
 319                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 320                                         Exit(EXIT_STATUS_CONFIG);
 321                                 }
 322                                 i++;
 323                         }
 324                         else
 325                         {
 326                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-logfile <filename>]\n",argv[0]);
 327                                 Exit(EXIT_STATUS_ARGV);
 328                         }
 329                 }
 330         }
 331
 332         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 333
 334         this->OpenLog(argv, argc);
 335         this->stats = new serverstats();
 336         this->Parser = new CommandParser(this);
 337         this->Timers = new TimerManager();
 338         this->XLines = new XLineManager(this);
 339         Config->ClearStack();
 340         Config->Read(true, NULL);
 341         this->CheckRoot();
 342         this->Modes = new ModeParser(this);
 343         this->AddServerName(Config->ServerName);
 344         CheckDie();
 345         InitializeDisabledCommands(Config->DisabledCommands, this);
 346         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 347
 348         for(int t = 0; t < 255; t++)
 349                 Config->global_implementation[t] = 0;
 350
 351         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 352
 353         printf("\n");
 354         this->SetSignals();
 355         if (!Config->nofork)
 356         {
 357                 if (!this->DaemonSeed())
 358                 {
 359                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 360                         Exit(EXIT_STATUS_FORK);
 361                 }
 362         }
 363
 364         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 365          * initialize the socket engine.
 366          */
 367         SocketEngineFactory* SEF = new SocketEngineFactory();
 368         SE = SEF->Create(this);
 369         delete SEF;
 370
 371         this->Res = new DNS(this);
 372
 373         this->LoadAllModules();
 374         /* Just in case no modules were loaded - fix for bug #101 */
 375         this->BuildISupport();
 376
 377         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 378         {
 379                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 380                 Exit(EXIT_STATUS_BIND);
 381         }
 382
 383         if (stats->BoundPortCount != (unsigned int)found_ports)
 384         {
 385                 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);
 386                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 387                 int j = 1;
 388                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 389                 {
 390                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 391                 }
 392         }
 393
 394         /* Add the listening sockets used for client inbound connections
 395          * to the socket engine
 396          */
 397         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 398         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 399         {
 400                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]->GetFd());
 401                 if (!SE->AddFd(Config->openSockfd[count]))
 402                 {
 403                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 404                         Exit(EXIT_STATUS_INTERNAL);
 405                 }
 406         }
 407
 408         if (!Config->nofork)
 409         {
 410                 if (kill(getppid(), SIGTERM) == -1)
 411                         printf("Error killing parent process: %s\n",strerror(errno));
 412                 fclose(stdin);
 413                 fclose(stderr);
 414                 fclose(stdout);
 415         }
 416
 417         printf("\nInspIRCd is now running!\n");
 418
 419         this->WritePID(Config->PID);
 420 }
 421
 422 std::string InspIRCd::GetVersionString()
 423 {
 424         char versiondata[MAXBUF];
 425         char dnsengine[] = "singlethread-object";
 426         if (*Config->CustomVersion)
 427         {
 428                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 429         }
 430         else
 431         {
 432                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 433         }
 434         return versiondata;
 435 }
 436
 437 char* InspIRCd::ModuleError()
 438 {
 439         return MODERR;
 440 }
 441
 442 void InspIRCd::EraseFactory(int j)
 443 {
 444         int v = 0;
 445         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 446         {
 447                 if (v == j)
 448                 {
 449                         delete *t;
 450                         factory.erase(t);
 451                         factory.push_back(NULL);
 452                         return;
 453                 }
 454                 v++;
 455         }
 456 }
 457
 458 void InspIRCd::EraseModule(int j)
 459 {
 460         int v1 = 0;
 461         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 462         {
 463                 if (v1 == j)
 464                 {
 465                         DELETE(*m);
 466                         modules.erase(m);
 467                         modules.push_back(NULL);
 468                         break;
 469                 }
 470                 v1++;
 471         }
 472         int v2 = 0;
 473         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 474         {
 475                 if (v2 == j)
 476                 {
 477                        Config->module_names.erase(v);
 478                        break;
 479                 }
 480                 v2++;
 481         }
 482
 483 }
 484
 485 void InspIRCd::MoveTo(std::string modulename,int slot)
 486 {
 487         unsigned int v2 = 256;
 488         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 489         {
 490                 if (Config->module_names[v] == modulename)
 491                 {
 492                         // found an instance, swap it with the item at the end
 493                         v2 = v;
 494                         break;
 495                 }
 496         }
 497         if ((v2 != (unsigned int)slot) && (v2 < 256))
 498         {
 499                 // Swap the module names over
 500                 Config->module_names[v2] = Config->module_names[slot];
 501                 Config->module_names[slot] = modulename;
 502                 // now swap the module factories
 503                 ircd_module* temp = factory[v2];
 504                 factory[v2] = factory[slot];
 505                 factory[slot] = temp;
 506                 // now swap the module objects
 507                 Module* temp_module = modules[v2];
 508                 modules[v2] = modules[slot];
 509                 modules[slot] = temp_module;
 510                 // now swap the implement lists (we dont
 511                 // need to swap the global or recount it)
 512                 for (int n = 0; n < 255; n++)
 513                 {
 514                         char x = Config->implement_lists[v2][n];
 515                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 516                         Config->implement_lists[slot][n] = x;
 517                 }
 518         }
 519         else
 520         {
 521                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 522         }
 523 }
 524
 525 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 526 {
 527         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 528         {
 529                 if (Config->module_names[v] == after)
 530                 {
 531                         MoveTo(modulename, v);
 532                         return;
 533                 }
 534         }
 535 }
 536
 537 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 538 {
 539         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 540         {
 541                 if (Config->module_names[v] == before)
 542                 {
 543                         if (v > 0)
 544                         {
 545                                 MoveTo(modulename, v-1);
 546                         }
 547                         else
 548                         {
 549                                 MoveTo(modulename, v);
 550                         }
 551                         return;
 552                 }
 553         }
 554 }
 555
 556 void InspIRCd::MoveToFirst(std::string modulename)
 557 {
 558         MoveTo(modulename,0);
 559 }
 560
 561 void InspIRCd::MoveToLast(std::string modulename)
 562 {
 563         MoveTo(modulename,this->GetModuleCount());
 564 }
 565
 566 void InspIRCd::BuildISupport()
 567 {
 568         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 569         std::stringstream v;
 570         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 571         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 572         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 573         Config->data005 = v.str();
 574         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 575         Config->Update005();
 576 }
 577
 578 bool InspIRCd::UnloadModule(const char* filename)
 579 {
 580         std::string filename_str = filename;
 581         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 582         {
 583                 if (Config->module_names[j] == filename_str)
 584                 {
 585                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 586                         {
 587                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 588                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 589                                 return false;
 590                         }
 591                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 592                         if (intercount.first > 0)
 593                         {
 594                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 595                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 596                                                 intercount.first,
 597                                                 intercount.first > 1 ? "s" : "",
 598                                                 intercount.first > 1 ? "are" : "is",
 599                                                 intercount.second.c_str());
 600                                 return false;
 601                         }
 602                         /* Give the module a chance to tidy out all its metadata */
 603                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 604                         {
 605                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 606                         }
 607                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 608                         {
 609                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 610                         }
 611
 612                         /* Tidy up any dangling resolvers */
 613                         this->Res->CleanResolvers(modules[j]);
 614
 615                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 616
 617                         for(int t = 0; t < 255; t++)
 618                         {
 619                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 620                         }
 621
 622                         /* We have to renumber implement_lists after unload because the module numbers change!
 623                          */
 624                         for(int j2 = j; j2 < 254; j2++)
 625                         {
 626                                 for(int t = 0; t < 255; t++)
 627                                 {
 628                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 629                                 }
 630                         }
 631
 632                         // found the module
 633                         Parser->RemoveCommands(filename);
 634                         this->EraseModule(j);
 635                         this->EraseFactory(j);
 636                         this->Log(DEFAULT,"Module %s unloaded",filename);
 637                         this->ModCount--;
 638                         BuildISupport();
 639                         return true;
 640                 }
 641         }
 642         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 643         snprintf(MODERR,MAXBUF,"Module not loaded");
 644         return false;
 645 }
 646
 647 bool InspIRCd::LoadModule(const char* filename)
 648 {
 649         /* Do we have a glob pattern in the filename?
 650          * The user wants to load multiple modules which
 651          * match the pattern.
 652          */
 653         if (strchr(filename,'*') || (strchr(filename,'?')))
 654         {
 655                 int n_match = 0;
 656                 DIR* library = opendir(Config->ModPath);
 657                 if (library)
 658                 {
 659                         /* Try and locate and load all modules matching the pattern */
 660                         dirent* entry = NULL;
 661                         while ((entry = readdir(library)))
 662                         {
 663                                 if (this->MatchText(entry->d_name, filename))
 664                                 {
 665                                         if (!this->LoadModule(entry->d_name))
 666                                                 n_match++;
 667                                 }
 668                         }
 669                         closedir(library);
 670                 }
 671                 /* Loadmodule will now return false if any one of the modules failed
 672                  * to load (but wont abort when it encounters a bad one) and when 1 or
 673                  * more modules were actually loaded.
 674                  */
 675                 return (n_match > 0);
 676         }
 677
 678         char modfile[MAXBUF];
 679         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 680         std::string filename_str = filename;
 681
 682         if (!ServerConfig::DirValid(modfile))
 683         {
 684                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 685                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 686                 return false;
 687         }
 688         this->Log(DEBUG,"Loading module: %s",modfile);
 689
 690         if (ServerConfig::FileExists(modfile))
 691         {
 692
 693                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 694                 {
 695                         if (Config->module_names[j] == filename_str)
 696                         {
 697                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 698                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 699                                 return false;
 700                         }
 701                 }
 702                 try
 703                 {
 704                         ircd_module* a = new ircd_module(this, modfile);
 705                         factory[this->ModCount+1] = a;
 706                         if (factory[this->ModCount+1]->LastError())
 707                         {
 708                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 709                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 710                                 return false;
 711                         }
 712                         if ((long)factory[this->ModCount+1]->factory != -1)
 713                         {
 714                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 715
 716                                 Version v = m->GetVersion();
 717
 718                                 if (v.API != API_VERSION)
 719                                 {
 720                                         delete m;
 721                                         delete a;
 722                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 723                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 724                                         return false;
 725                                 }
 726                                 else
 727                                 {
 728                                         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]"));
 729                                 }
 730
 731                                 modules[this->ModCount+1] = m;
 732                                 /* save the module and the module's classfactory, if
 733                                  * this isnt done, random crashes can occur :/ */
 734                                 Config->module_names.push_back(filename);
 735
 736                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 737                                 for(int t = 0; t < 255; t++)
 738                                         x[t] = 0;
 739
 740                                 modules[this->ModCount+1]->Implements(x);
 741
 742                                 for(int t = 0; t < 255; t++)
 743                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 744                         }
 745                         else
 746                         {
 747                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 748                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 749                                 return false;
 750                         }
 751                 }
 752                 catch (CoreException& modexcept)
 753                 {
 754                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 755                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 756                         return false;
 757                 }
 758         }
 759         else
 760         {
 761                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 762                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 763                 return false;
 764         }
 765         this->ModCount++;
 766         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 767         // now work out which modules, if any, want to move to the back of the queue,
 768         // and if they do, move them there.
 769         std::vector<std::string> put_to_back;
 770         std::vector<std::string> put_to_front;
 771         std::map<std::string,std::string> put_before;
 772         std::map<std::string,std::string> put_after;
 773         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 774         {
 775                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 776                         put_to_back.push_back(Config->module_names[j]);
 777                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 778                         put_to_front.push_back(Config->module_names[j]);
 779                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 780                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 781                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 782                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 783         }
 784         for (unsigned int j = 0; j < put_to_back.size(); j++)
 785                 MoveToLast(put_to_back[j]);
 786         for (unsigned int j = 0; j < put_to_front.size(); j++)
 787                 MoveToFirst(put_to_front[j]);
 788         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 789                 MoveBefore(j->first,j->second);
 790         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 791                 MoveAfter(j->first,j->second);
 792         BuildISupport();
 793         return true;
 794 }
 795
 796 void InspIRCd::DoOneIteration(bool process_module_sockets)
 797 {
 798         static rusage ru;
 799
 800         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 801          * Once per loop iteration is pleanty.
 802          */
 803         OLDTIME = TIME;
 804         TIME = time(NULL);
 805
 806         /* Run background module timers every few seconds
 807          * (the docs say modules shouldnt rely on accurate
 808          * timing using this event, so we dont have to
 809          * time this exactly).
 810          */
 811         if (TIME != OLDTIME)
 812         {
 813                 if (TIME < OLDTIME)
 814                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 815                 if ((TIME % 3600) == 0)
 816                 {
 817                         irc::whowas::MaintainWhoWas(this, TIME);
 818                         this->RehashUsersAndChans();
 819                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
 820                 }
 821                 Timers->TickTimers(TIME);
 822                 this->DoBackgroundUserStuff(TIME);
 823
 824                 if ((TIME % 5) == 0)
 825                 {
 826                         XLines->expire_lines();
 827                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 828                         Timers->TickMissedTimers(TIME);
 829                 }
 830
 831                 if (!getrusage(0, &ru))
 832                 {
 833                         gettimeofday(&this->stats->LastSampled, NULL);
 834                         this->stats->LastCPU = ru.ru_utime;
 835                 }
 836         }
 837
 838         /* Call the socket engine to wait on the active
 839          * file descriptors. The socket engine has everything's
 840          * descriptors in its list... dns, modules, users,
 841          * servers... so its nice and easy, just one call.
 842          * This will cause any read or write events to be
 843          * dispatched to their handlers.
 844          */
 845         SE->DispatchEvents();
 846 }
 847
 848 bool InspIRCd::IsIdent(const char* n)
 849 {
 850         if (!n || !*n)
 851                 return false;
 852
 853         for (char* i = (char*)n; *i; i++)
 854         {
 855                 if ((*i >= 'A') && (*i <= '}'))
 856                 {
 857                         continue;
 858                 }
 859                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 860                 {
 861                         continue;
 862                 }
 863                 return false;
 864         }
 865         return true;
 866 }
 867
 868
 869 int InspIRCd::Run()
 870 {
 871         while (true)
 872         {
 873                 DoOneIteration(true);
 874         }
 875         /* This is never reached -- we hope! */
 876         return 0;
 877 }
 878
 879 /**********************************************************************************/
 880
 881 /**
 882  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 883  */
 884
 885 int main(int argc, char** argv)
 886 {
 887         SI = new InspIRCd(argc, argv);
 888         SI->Run();
 889         delete SI;
 890         return 0;
 891 }
 892
 893 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 894  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 895  * registration timeout maximum seconds)
 896  */
 897 bool InspIRCd::AllModulesReportReady(userrec* user)
 898 {
 899         if (!Config->global_implementation[I_OnCheckReady])
 900                 return true;
 901
 902         for (int i = 0; i <= this->GetModuleCount(); i++)
 903         {
 904                 if (Config->implement_lists[i][I_OnCheckReady])
 905                 {
 906                         int res = modules[i]->OnCheckReady(user);
 907                         if (!res)
 908                                 return false;
 909                 }
 910         }
 911         return true;
 912 }
 913
 914 int InspIRCd::GetModuleCount()
 915 {
 916         return this->ModCount;
 917 }
 918
 919 time_t InspIRCd::Time(bool delta)
 920 {
 921         if (delta)
 922                 return TIME + time_delta;
 923         return TIME;
 924 }
 925
 926 int InspIRCd::SetTimeDelta(int delta)
 927 {
 928         int old = time_delta;
 929         time_delta += delta;
 930         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 931         return old;
 932 }
 933
 934 void InspIRCd::AddLocalClone(userrec* user)
 935 {
 936         clonemap::iterator x = local_clones.find(user->GetIPString());
 937         if (x != local_clones.end())
 938                 x->second++;
 939         else
 940                 local_clones[user->GetIPString()] = 1;
 941 }
 942
 943 void InspIRCd::AddGlobalClone(userrec* user)
 944 {
 945         clonemap::iterator y = global_clones.find(user->GetIPString());
 946         if (y != global_clones.end())
 947                 y->second++;
 948         else
 949                 global_clones[user->GetIPString()] = 1;
 950 }
 951
 952 int InspIRCd::GetTimeDelta()
 953 {
 954         return time_delta;
 955 }
 956
 957 bool FileLogger::Readable()
 958 {
 959         return false;
 960 }
 961
 962 void FileLogger::HandleEvent(EventType et, int errornum)
 963 {
 964         this->WriteLogLine("");
 965         if (log)
 966                 ServerInstance->SE->DelFd(this);
 967 }
 968
 969 void FileLogger::WriteLogLine(const std::string &line)
 970 {
 971         if (line.length())
 972                 buffer.append(line);
 973
 974         if (log)
 975         {
 976                 int written = fprintf(log,"%s",buffer.c_str());
 977                 if ((written >= 0) && (written < (int)buffer.length()))
 978                 {
 979                         buffer.erase(0, buffer.length());
 980                         ServerInstance->SE->AddFd(this);
 981                 }
 982                 else if (written == -1)
 983                 {
 984                         if (errno == EAGAIN)
 985                                 ServerInstance->SE->AddFd(this);
 986                 }
 987                 else
 988                 {
 989                         /* Wrote the whole buffer, and no need for write callback */
 990                         buffer = "";
 991                 }
 992         }
 993         if (writeops++ % 20)
 994         {
 995                 fflush(log);
 996         }
 997 }
 998
 999 void FileLogger::Close()
1000 {
1001         if (log)
1002         {
1003                 int flags = fcntl(fileno(log), F_GETFL, 0);
1004                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
1005                 if (buffer.size())
1006                         fprintf(log,"%s",buffer.c_str());
1007
1008                 ServerInstance->SE->DelFd(this);
1009
1010                 fflush(log);
1011                 fclose(log);
1012         }
1013
1014         buffer = "";
1015 }
1016
1017 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
1018 {
1019         if (log)
1020         {
1021                 irc::sockets::NonBlocking(fileno(log));
1022                 this->SetFd(fileno(log));
1023                 buffer = "";
1024         }
1025 }
1026
1027 FileLogger::~FileLogger()
1028 {
1029         this->Close();
1030 }
1031