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(CONFIG_FILE));
 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         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(NULL,""));
 155 }
 156
 157 void InspIRCd::ResetMaxBans()
 158 {
 159         for (chan_hash::const_iterator i = chanlist->begin(); i != chanlist->end(); i++)
 160                 i->second->ResetMaxBans();
 161 }
 162
 163
 164 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 165  * we must occasionally rehash the hash (yes really).
 166  * We do this by copying the entries from the old hash to a new hash, causing all
 167  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 168  * very expensive, so instead we do it when the user types /REHASH and expects a
 169  * short delay anyway.
 170  */
 171 void InspIRCd::RehashUsersAndChans()
 172 {
 173         user_hash* old_users = this->clientlist;
 174         chan_hash* old_chans = this->chanlist;
 175
 176         this->clientlist = new user_hash();
 177         this->chanlist = new chan_hash();
 178
 179         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 180                 this->clientlist->insert(*n);
 181
 182         delete old_users;
 183
 184         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 185                 this->chanlist->insert(*n);
 186
 187         delete old_chans;
 188 }
 189
 190 void InspIRCd::CloseLog()
 191 {
 192         this->Logger->Close();
 193 }
 194
 195 void InspIRCd::SetSignals()
 196 {
 197         signal(SIGALRM, SIG_IGN);
 198         signal(SIGHUP, InspIRCd::Rehash);
 199         signal(SIGPIPE, SIG_IGN);
 200         signal(SIGTERM, InspIRCd::Exit);
 201         signal(SIGCHLD, SIG_IGN);
 202 }
 203
 204 bool InspIRCd::DaemonSeed()
 205 {
 206         int childpid;
 207         if ((childpid = fork ()) < 0)
 208                 return false;
 209         else if (childpid > 0)
 210         {
 211                 /* We wait here for the child process to kill us,
 212                  * so that the shell prompt doesnt come back over
 213                  * the output.
 214                  * Sending a kill with a signal of 0 just checks
 215                  * if the child pid is still around. If theyre not,
 216                  * they threw an error and we should give up.
 217                  */
 218                 while (kill(childpid, 0) != -1)
 219                         sleep(1);
 220                 exit(0);
 221         }
 222         setsid ();
 223         umask (007);
 224         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 225
 226         rlimit rl;
 227         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 228         {
 229                 this->Log(DEFAULT,"Failed to getrlimit()!");
 230                 return false;
 231         }
 232         else
 233         {
 234                 rl.rlim_cur = rl.rlim_max;
 235                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 236                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 237         }
 238
 239         return true;
 240 }
 241
 242 void InspIRCd::WritePID(const std::string &filename)
 243 {
 244         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 245         if (*(fname.begin()) != '/')
 246         {
 247                 std::string::size_type pos;
 248                 std::string confpath = CONFIG_FILE;
 249                 if ((pos = confpath.find("/inspircd.conf")) != std::string::npos)
 250                 {
 251                         /* Leaves us with just the path */
 252                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 253                 }
 254         }
 255         std::ofstream outfile(fname.c_str());
 256         if (outfile.is_open())
 257         {
 258                 outfile << getpid();
 259                 outfile.close();
 260         }
 261         else
 262         {
 263                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 264                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 265                 Exit(EXIT_STATUS_PID);
 266         }
 267 }
 268
 269 std::string InspIRCd::GetRevision()
 270 {
 271         return REVISION;
 272 }
 273
 274 InspIRCd::InspIRCd(int argc, char** argv)
 275         : 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)
 276 {
 277         int found_ports = 0;
 278         FailedPortList pl;
 279         int do_nofork = 0, do_debug = 0, do_nolog = 0;    /* flag variables */
 280         char c = 0;
 281
 282         modules.resize(255);
 283         factory.resize(255);
 284
 285         this->unregistered_count = 0;
 286
 287         this->clientlist = new user_hash();
 288         this->chanlist = new chan_hash();
 289
 290         this->Config = new ServerConfig(this);
 291
 292         this->Config->argv = argv;
 293         this->Config->argc = argc;
 294
 295         this->Config->opertypes.clear();
 296         this->Config->operclass.clear();
 297         this->SNO = new SnomaskManager(this);
 298         this->Start();
 299         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 300         this->time_delta = 0;
 301         this->next_call = this->TIME + 3;
 302         srand(this->TIME);
 303
 304         if (!ServerConfig::FileExists(CONFIG_FILE))
 305         {
 306                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 307                 this->Log(DEFAULT,"main: no config");
 308                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 309                 Exit(EXIT_STATUS_CONFIG);
 310         }
 311
 312         *this->LogFileName = 0;
 313
 314         struct option longopts[] =
 315         {
 316                 { "nofork",     no_argument,            &do_nofork,     1       },
 317                 { "logfile",    required_argument,      NULL,           'f'     },
 318                 { "debug",      no_argument,            &do_debug,      1       },
 319                 { "nolog",      no_argument,            &do_nolog,      1       },
 320                 { 0, 0, 0, 0 }
 321         };
 322
 323         while ((c = getopt_long_only(argc, argv, ":f:", longopts, NULL)) != -1)
 324         {
 325                 switch (c)
 326                 {
 327                         case 'f':
 328                                 /* Log filename was set */
 329                                 strlcpy(LogFileName, optarg, MAXBUF);
 330                                 printf("LOG: Setting logfile to %s\n", LogFileName);
 331                         break;
 332                         case 0:
 333                                 /* getopt_long_only() set an int variable, just keep going */
 334                         break;
 335                         default:
 336                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 337                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>]\n", argv[0]);
 338                                 Exit(EXIT_STATUS_ARGV);
 339                         break;
 340                 }
 341         }
 342
 343         /* Set the finished argument values */
 344         Config->nofork = do_nofork;
 345         Config->forcedebug = do_debug;
 346         Config->writelog = !do_nolog;
 347
 348         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 349
 350         this->OpenLog(argv, argc);
 351         this->stats = new serverstats();
 352         this->Timers = new TimerManager(this);
 353         this->Parser = new CommandParser(this);
 354         this->XLines = new XLineManager(this);
 355         Config->ClearStack();
 356         Config->Read(true, NULL);
 357         this->CheckRoot();
 358         this->Modes = new ModeParser(this);
 359         this->AddServerName(Config->ServerName);
 360         CheckDie();
 361         InitializeDisabledCommands(Config->DisabledCommands, this);
 362         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 363
 364         for(int t = 0; t < 255; t++)
 365                 Config->global_implementation[t] = 0;
 366
 367         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 368
 369         printf("\n");
 370         this->SetSignals();
 371         if (!Config->nofork)
 372         {
 373                 if (!this->DaemonSeed())
 374                 {
 375                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 376                         Exit(EXIT_STATUS_FORK);
 377                 }
 378         }
 379
 380         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 381          * initialize the socket engine.
 382          */
 383         SocketEngineFactory* SEF = new SocketEngineFactory();
 384         SE = SEF->Create(this);
 385         delete SEF;
 386
 387         this->Res = new DNS(this);
 388
 389         this->LoadAllModules();
 390         /* Just in case no modules were loaded - fix for bug #101 */
 391         this->BuildISupport();
 392
 393         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 394         {
 395                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 396                 Exit(EXIT_STATUS_BIND);
 397         }
 398
 399         if (stats->BoundPortCount != (unsigned int)found_ports)
 400         {
 401                 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);
 402                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 403                 int j = 1;
 404                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 405                 {
 406                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 407                 }
 408         }
 409
 410         /* Add the listening sockets used for client inbound connections
 411          * to the socket engine
 412          */
 413         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 414         {
 415                 if (!SE->AddFd(Config->openSockfd[count]))
 416                 {
 417                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 418                         Exit(EXIT_STATUS_INTERNAL);
 419                 }
 420         }
 421
 422         if (!Config->nofork)
 423         {
 424                 if (kill(getppid(), SIGTERM) == -1)
 425                         printf("Error killing parent process: %s\n",strerror(errno));
 426                 fclose(stdin);
 427                 fclose(stderr);
 428                 fclose(stdout);
 429         }
 430
 431         printf("\nInspIRCd is now running!\n");
 432
 433         this->WritePID(Config->PID);
 434 }
 435
 436 std::string InspIRCd::GetVersionString()
 437 {
 438         char versiondata[MAXBUF];
 439         char dnsengine[] = "singlethread-object";
 440         if (*Config->CustomVersion)
 441         {
 442                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 443         }
 444         else
 445         {
 446                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%s,%s,%s]",VERSION,Config->ServerName,SYSTEM,REVISION,SE->GetName().c_str(),dnsengine);
 447         }
 448         return versiondata;
 449 }
 450
 451 char* InspIRCd::ModuleError()
 452 {
 453         return MODERR;
 454 }
 455
 456 void InspIRCd::EraseFactory(int j)
 457 {
 458         int v = 0;
 459         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 460         {
 461                 if (v == j)
 462                 {
 463                         delete *t;
 464                         factory.erase(t);
 465                         factory.push_back(NULL);
 466                         return;
 467                 }
 468                 v++;
 469         }
 470 }
 471
 472 void InspIRCd::EraseModule(int j)
 473 {
 474         int v1 = 0;
 475         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 476         {
 477                 if (v1 == j)
 478                 {
 479                         DELETE(*m);
 480                         modules.erase(m);
 481                         modules.push_back(NULL);
 482                         break;
 483                 }
 484                 v1++;
 485         }
 486         int v2 = 0;
 487         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 488         {
 489                 if (v2 == j)
 490                 {
 491                        Config->module_names.erase(v);
 492                        break;
 493                 }
 494                 v2++;
 495         }
 496
 497 }
 498
 499 void InspIRCd::MoveTo(std::string modulename,int slot)
 500 {
 501         unsigned int v2 = 256;
 502         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 503         {
 504                 if (Config->module_names[v] == modulename)
 505                 {
 506                         // found an instance, swap it with the item at the end
 507                         v2 = v;
 508                         break;
 509                 }
 510         }
 511         if ((v2 != (unsigned int)slot) && (v2 < 256))
 512         {
 513                 // Swap the module names over
 514                 Config->module_names[v2] = Config->module_names[slot];
 515                 Config->module_names[slot] = modulename;
 516                 // now swap the module factories
 517                 ircd_module* temp = factory[v2];
 518                 factory[v2] = factory[slot];
 519                 factory[slot] = temp;
 520                 // now swap the module objects
 521                 Module* temp_module = modules[v2];
 522                 modules[v2] = modules[slot];
 523                 modules[slot] = temp_module;
 524                 // now swap the implement lists (we dont
 525                 // need to swap the global or recount it)
 526                 for (int n = 0; n < 255; n++)
 527                 {
 528                         char x = Config->implement_lists[v2][n];
 529                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 530                         Config->implement_lists[slot][n] = x;
 531                 }
 532         }
 533 }
 534
 535 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 536 {
 537         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 538         {
 539                 if (Config->module_names[v] == after)
 540                 {
 541                         MoveTo(modulename, v);
 542                         return;
 543                 }
 544         }
 545 }
 546
 547 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 548 {
 549         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 550         {
 551                 if (Config->module_names[v] == before)
 552                 {
 553                         if (v > 0)
 554                         {
 555                                 MoveTo(modulename, v-1);
 556                         }
 557                         else
 558                         {
 559                                 MoveTo(modulename, v);
 560                         }
 561                         return;
 562                 }
 563         }
 564 }
 565
 566 void InspIRCd::MoveToFirst(std::string modulename)
 567 {
 568         MoveTo(modulename,0);
 569 }
 570
 571 void InspIRCd::MoveToLast(std::string modulename)
 572 {
 573         MoveTo(modulename,this->GetModuleCount());
 574 }
 575
 576 void InspIRCd::BuildISupport()
 577 {
 578         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 579         std::stringstream v;
 580         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << Config->MaxChans << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 581         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 582         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 583         Config->data005 = v.str();
 584         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 585         Config->Update005();
 586 }
 587
 588 bool InspIRCd::UnloadModule(const char* filename)
 589 {
 590         std::string filename_str = filename;
 591         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 592         {
 593                 if (Config->module_names[j] == filename_str)
 594                 {
 595                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 596                         {
 597                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 598                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 599                                 return false;
 600                         }
 601                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 602                         if (intercount.first > 0)
 603                         {
 604                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 605                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 606                                                 intercount.first,
 607                                                 intercount.first > 1 ? "s" : "",
 608                                                 intercount.first > 1 ? "are" : "is",
 609                                                 intercount.second.c_str());
 610                                 return false;
 611                         }
 612                         /* Give the module a chance to tidy out all its metadata */
 613                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 614                         {
 615                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 616                         }
 617                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 618                         {
 619                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 620                         }
 621
 622                         /* Tidy up any dangling resolvers */
 623                         this->Res->CleanResolvers(modules[j]);
 624
 625                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 626
 627                         for(int t = 0; t < 255; t++)
 628                         {
 629                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 630                         }
 631
 632                         /* We have to renumber implement_lists after unload because the module numbers change!
 633                          */
 634                         for(int j2 = j; j2 < 254; j2++)
 635                         {
 636                                 for(int t = 0; t < 255; t++)
 637                                 {
 638                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 639                                 }
 640                         }
 641
 642                         // found the module
 643                         Parser->RemoveCommands(filename);
 644                         this->EraseModule(j);
 645                         this->EraseFactory(j);
 646                         this->Log(DEFAULT,"Module %s unloaded",filename);
 647                         this->ModCount--;
 648                         BuildISupport();
 649                         return true;
 650                 }
 651         }
 652         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 653         snprintf(MODERR,MAXBUF,"Module not loaded");
 654         return false;
 655 }
 656
 657 bool InspIRCd::LoadModule(const char* filename)
 658 {
 659         /* Do we have a glob pattern in the filename?
 660          * The user wants to load multiple modules which
 661          * match the pattern.
 662          */
 663         if (strchr(filename,'*') || (strchr(filename,'?')))
 664         {
 665                 int n_match = 0;
 666                 DIR* library = opendir(Config->ModPath);
 667                 if (library)
 668                 {
 669                         /* Try and locate and load all modules matching the pattern */
 670                         dirent* entry = NULL;
 671                         while ((entry = readdir(library)))
 672                         {
 673                                 if (this->MatchText(entry->d_name, filename))
 674                                 {
 675                                         if (!this->LoadModule(entry->d_name))
 676                                                 n_match++;
 677                                 }
 678                         }
 679                         closedir(library);
 680                 }
 681                 /* Loadmodule will now return false if any one of the modules failed
 682                  * to load (but wont abort when it encounters a bad one) and when 1 or
 683                  * more modules were actually loaded.
 684                  */
 685                 return (n_match > 0);
 686         }
 687
 688         char modfile[MAXBUF];
 689         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 690         std::string filename_str = filename;
 691
 692         if (!ServerConfig::DirValid(modfile))
 693         {
 694                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 695                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 696                 return false;
 697         }
 698         if (ServerConfig::FileExists(modfile))
 699         {
 700
 701                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 702                 {
 703                         if (Config->module_names[j] == filename_str)
 704                         {
 705                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 706                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 707                                 return false;
 708                         }
 709                 }
 710                 try
 711                 {
 712                         ircd_module* a = new ircd_module(this, modfile);
 713                         factory[this->ModCount+1] = a;
 714                         if (factory[this->ModCount+1]->LastError())
 715                         {
 716                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 717                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 718                                 return false;
 719                         }
 720                         if ((long)factory[this->ModCount+1]->factory != -1)
 721                         {
 722                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 723
 724                                 Version v = m->GetVersion();
 725
 726                                 if (v.API != API_VERSION)
 727                                 {
 728                                         delete m;
 729                                         delete a;
 730                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 731                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 732                                         return false;
 733                                 }
 734                                 else
 735                                 {
 736                                         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]"));
 737                                 }
 738
 739                                 modules[this->ModCount+1] = m;
 740                                 /* save the module and the module's classfactory, if
 741                                  * this isnt done, random crashes can occur :/ */
 742                                 Config->module_names.push_back(filename);
 743
 744                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 745                                 for(int t = 0; t < 255; t++)
 746                                         x[t] = 0;
 747
 748                                 modules[this->ModCount+1]->Implements(x);
 749
 750                                 for(int t = 0; t < 255; t++)
 751                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 752                         }
 753                         else
 754                         {
 755                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 756                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 757                                 return false;
 758                         }
 759                 }
 760                 catch (CoreException& modexcept)
 761                 {
 762                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 763                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 764                         return false;
 765                 }
 766         }
 767         else
 768         {
 769                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 770                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 771                 return false;
 772         }
 773         this->ModCount++;
 774         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 775         // now work out which modules, if any, want to move to the back of the queue,
 776         // and if they do, move them there.
 777         std::vector<std::string> put_to_back;
 778         std::vector<std::string> put_to_front;
 779         std::map<std::string,std::string> put_before;
 780         std::map<std::string,std::string> put_after;
 781         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 782         {
 783                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 784                         put_to_back.push_back(Config->module_names[j]);
 785                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 786                         put_to_front.push_back(Config->module_names[j]);
 787                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 788                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 789                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 790                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 791         }
 792         for (unsigned int j = 0; j < put_to_back.size(); j++)
 793                 MoveToLast(put_to_back[j]);
 794         for (unsigned int j = 0; j < put_to_front.size(); j++)
 795                 MoveToFirst(put_to_front[j]);
 796         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 797                 MoveBefore(j->first,j->second);
 798         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 799                 MoveAfter(j->first,j->second);
 800         BuildISupport();
 801         return true;
 802 }
 803
 804 void InspIRCd::DoOneIteration(bool process_module_sockets)
 805 {
 806         static rusage ru;
 807
 808         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 809          * Once per loop iteration is pleanty.
 810          */
 811         OLDTIME = TIME;
 812         TIME = time(NULL);
 813
 814         /* Run background module timers every few seconds
 815          * (the docs say modules shouldnt rely on accurate
 816          * timing using this event, so we dont have to
 817          * time this exactly).
 818          */
 819         if (TIME != OLDTIME)
 820         {
 821                 if (TIME < OLDTIME)
 822                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 823                 if ((TIME % 3600) == 0)
 824                 {
 825                         this->RehashUsersAndChans();
 826                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
 827                 }
 828                 Timers->TickTimers(TIME);
 829                 this->DoBackgroundUserStuff(TIME);
 830
 831                 if ((TIME % 5) == 0)
 832                 {
 833                         XLines->expire_lines();
 834                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 835                         Timers->TickMissedTimers(TIME);
 836                 }
 837
 838                 if (!getrusage(0, &ru))
 839                 {
 840                         gettimeofday(&this->stats->LastSampled, NULL);
 841                         this->stats->LastCPU = ru.ru_utime;
 842                 }
 843         }
 844
 845         /* Call the socket engine to wait on the active
 846          * file descriptors. The socket engine has everything's
 847          * descriptors in its list... dns, modules, users,
 848          * servers... so its nice and easy, just one call.
 849          * This will cause any read or write events to be
 850          * dispatched to their handlers.
 851          */
 852         SE->DispatchEvents();
 853
 854         /* if any users was quit, take them out */
 855         GlobalCulls.Apply();
 856
 857 }
 858
 859 bool InspIRCd::IsIdent(const char* n)
 860 {
 861         if (!n || !*n)
 862                 return false;
 863
 864         for (char* i = (char*)n; *i; i++)
 865         {
 866                 if ((*i >= 'A') && (*i <= '}'))
 867                 {
 868                         continue;
 869                 }
 870                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 871                 {
 872                         continue;
 873                 }
 874                 return false;
 875         }
 876         return true;
 877 }
 878
 879
 880 int InspIRCd::Run()
 881 {
 882         while (true)
 883         {
 884                 DoOneIteration(true);
 885         }
 886         /* This is never reached -- we hope! */
 887         return 0;
 888 }
 889
 890 /**********************************************************************************/
 891
 892 /**
 893  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 894  */
 895
 896 int main(int argc, char** argv)
 897 {
 898         SI = new InspIRCd(argc, argv);
 899         SI->Run();
 900         delete SI;
 901         return 0;
 902 }
 903
 904 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 905  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 906  * registration timeout maximum seconds)
 907  */
 908 bool InspIRCd::AllModulesReportReady(userrec* user)
 909 {
 910         if (!Config->global_implementation[I_OnCheckReady])
 911                 return true;
 912
 913         for (int i = 0; i <= this->GetModuleCount(); i++)
 914         {
 915                 if (Config->implement_lists[i][I_OnCheckReady])
 916                 {
 917                         int res = modules[i]->OnCheckReady(user);
 918                         if (!res)
 919                                 return false;
 920                 }
 921         }
 922         return true;
 923 }
 924
 925 int InspIRCd::GetModuleCount()
 926 {
 927         return this->ModCount;
 928 }
 929
 930 time_t InspIRCd::Time(bool delta)
 931 {
 932         if (delta)
 933                 return TIME + time_delta;
 934         return TIME;
 935 }
 936
 937 int InspIRCd::SetTimeDelta(int delta)
 938 {
 939         int old = time_delta;
 940         time_delta += delta;
 941         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 942         return old;
 943 }
 944
 945 void InspIRCd::AddLocalClone(userrec* user)
 946 {
 947         clonemap::iterator x = local_clones.find(user->GetIPString());
 948         if (x != local_clones.end())
 949                 x->second++;
 950         else
 951                 local_clones[user->GetIPString()] = 1;
 952 }
 953
 954 void InspIRCd::AddGlobalClone(userrec* user)
 955 {
 956         clonemap::iterator y = global_clones.find(user->GetIPString());
 957         if (y != global_clones.end())
 958                 y->second++;
 959         else
 960                 global_clones[user->GetIPString()] = 1;
 961 }
 962
 963 int InspIRCd::GetTimeDelta()
 964 {
 965         return time_delta;
 966 }
 967
 968 bool FileLogger::Readable()
 969 {
 970         return false;
 971 }
 972
 973 void FileLogger::HandleEvent(EventType et, int errornum)
 974 {
 975         this->WriteLogLine("");
 976         if (log)
 977                 ServerInstance->SE->DelFd(this);
 978 }
 979
 980 void FileLogger::WriteLogLine(const std::string &line)
 981 {
 982         if (line.length())
 983                 buffer.append(line);
 984
 985         if (log)
 986         {
 987                 int written = fprintf(log,"%s",buffer.c_str());
 988                 if ((written >= 0) && (written < (int)buffer.length()))
 989                 {
 990                         buffer.erase(0, buffer.length());
 991                         ServerInstance->SE->AddFd(this);
 992                 }
 993                 else if (written == -1)
 994                 {
 995                         if (errno == EAGAIN)
 996                                 ServerInstance->SE->AddFd(this);
 997                 }
 998                 else
 999                 {
1000                         /* Wrote the whole buffer, and no need for write callback */
1001                         buffer = "";
1002                 }
1003         }
1004         if (writeops++ % 20)
1005         {
1006                 fflush(log);
1007         }
1008 }
1009
1010 void FileLogger::Close()
1011 {
1012         if (log)
1013         {
1014                 int flags = fcntl(fileno(log), F_GETFL, 0);
1015                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
1016                 if (buffer.size())
1017                         fprintf(log,"%s",buffer.c_str());
1018
1019                 ServerInstance->SE->DelFd(this);
1020
1021                 fflush(log);
1022                 fclose(log);
1023         }
1024
1025         buffer = "";
1026 }
1027
1028 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
1029 {
1030         if (log)
1031         {
1032                 irc::sockets::NonBlocking(fileno(log));
1033                 this->SetFd(fileno(log));
1034                 buffer = "";
1035         }
1036 }
1037
1038 FileLogger::~FileLogger()
1039 {
1040         this->Close();
1041 }
1042