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 < Config->ports.size(); i++)
  82         {
  83                 /* This calls the constructor and closes the listening socket */
  84                 delete Config->ports[i];
  85         }
  86
  87         Config->ports.clear();
  88
  89         /* Close all client sockets, or the new process inherits them */
  90         for (std::vector<userrec*>::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
  91         {
  92                 (*i)->SetWriteError("Server shutdown");
  93                 (*i)->CloseSocket();
  94         }
  95
  96         /* We do this more than once, so that any service providers get a
  97          * chance to be unhooked by the modules using them, but then get
  98          * a chance to be removed themsleves.
  99          */
 100         for (int tries = 0; tries < 3; tries++)
 101         {
 102                 MyModCount = this->GetModuleCount();
 103                 mymodnames.clear();
 104
 105                 /* Unload all modules, so they get a chance to clean up their listeners */
 106                 for (int j = 0; j <= MyModCount; j++)
 107                         mymodnames.push_back(Config->module_names[j]);
 108
 109                 for (int k = 0; k <= MyModCount; k++)
 110                         this->UnloadModule(mymodnames[k].c_str());
 111         }
 112
 113         /* Close logging */
 114         this->Logger->Close();
 115 }
 116
 117 void InspIRCd::Restart(const std::string &reason)
 118 {
 119         /* SendError flushes each client's queue,
 120          * regardless of writeability state
 121          */
 122         this->SendError(reason);
 123
 124         this->Cleanup();
 125
 126         /* Figure out our filename (if theyve renamed it, we're boned) */
 127         std::string me = Config->MyDir + "/inspircd";
 128
 129         if (execv(me.c_str(), Config->argv) == -1)
 130         {
 131                 /* Will raise a SIGABRT if not trapped */
 132                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 133         }
 134 }
 135
 136 void InspIRCd::Start()
 137 {
 138         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 139         printf("(C) InspIRCd Development Team.\033[0m\n\n");
 140         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey\033[0m\n");
 141         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 142 }
 143
 144 void InspIRCd::Rehash(int status)
 145 {
 146         SI->WriteOpers("*** Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(SI->ConfigFileName));
 147         SI->CloseLog();
 148         SI->OpenLog(SI->Config->argv, SI->Config->argc);
 149         SI->RehashUsersAndChans();
 150         FOREACH_MOD_I(SI, I_OnGarbageCollect, OnGarbageCollect());
 151         SI->Config->Read(false,NULL);
 152         SI->ResetMaxBans();
 153         SI->Res->Rehash();
 154         SI->BuildISupport();
 155         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(NULL,""));
 156 }
 157
 158 void InspIRCd::ResetMaxBans()
 159 {
 160         for (chan_hash::const_iterator i = chanlist->begin(); i != chanlist->end(); i++)
 161                 i->second->ResetMaxBans();
 162 }
 163
 164
 165 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 166  * we must occasionally rehash the hash (yes really).
 167  * We do this by copying the entries from the old hash to a new hash, causing all
 168  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 169  * very expensive, so instead we do it when the user types /REHASH and expects a
 170  * short delay anyway.
 171  */
 172 void InspIRCd::RehashUsersAndChans()
 173 {
 174         user_hash* old_users = this->clientlist;
 175         chan_hash* old_chans = this->chanlist;
 176
 177         this->clientlist = new user_hash();
 178         this->chanlist = new chan_hash();
 179
 180         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 181                 this->clientlist->insert(*n);
 182
 183         delete old_users;
 184
 185         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 186                 this->chanlist->insert(*n);
 187
 188         delete old_chans;
 189 }
 190
 191 void InspIRCd::CloseLog()
 192 {
 193         this->Logger->Close();
 194 }
 195
 196 void InspIRCd::SetSignals()
 197 {
 198         signal(SIGALRM, SIG_IGN);
 199         signal(SIGHUP, InspIRCd::Rehash);
 200         signal(SIGPIPE, SIG_IGN);
 201         signal(SIGTERM, InspIRCd::Exit);
 202         signal(SIGCHLD, SIG_IGN);
 203 }
 204
 205 void InspIRCd::QuickExit(int status)
 206 {
 207         exit(0);
 208 }
 209
 210 bool InspIRCd::DaemonSeed()
 211 {
 212         signal(SIGTERM, InspIRCd::QuickExit);
 213
 214         int childpid;
 215         if ((childpid = fork ()) < 0)
 216                 return false;
 217         else if (childpid > 0)
 218         {
 219                 /* We wait here for the child process to kill us,
 220                  * so that the shell prompt doesnt come back over
 221                  * the output.
 222                  * Sending a kill with a signal of 0 just checks
 223                  * if the child pid is still around. If theyre not,
 224                  * they threw an error and we should give up.
 225                  */
 226                 while (kill(childpid, 0) != -1)
 227                         sleep(1);
 228                 exit(0);
 229         }
 230         setsid ();
 231         umask (007);
 232         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 233
 234         signal(SIGTERM, InspIRCd::Exit);
 235
 236         rlimit rl;
 237         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 238         {
 239                 this->Log(DEFAULT,"Failed to getrlimit()!");
 240                 return false;
 241         }
 242         else
 243         {
 244                 rl.rlim_cur = rl.rlim_max;
 245                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 246                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 247         }
 248
 249         return true;
 250 }
 251
 252 void InspIRCd::WritePID(const std::string &filename)
 253 {
 254         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 255         if (*(fname.begin()) != '/')
 256         {
 257                 std::string::size_type pos;
 258                 std::string confpath = this->ConfigFileName;
 259                 if ((pos = confpath.rfind("/")) != std::string::npos)
 260                 {
 261                         /* Leaves us with just the path */
 262                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 263                 }
 264         }
 265         std::ofstream outfile(fname.c_str());
 266         if (outfile.is_open())
 267         {
 268                 outfile << getpid();
 269                 outfile.close();
 270         }
 271         else
 272         {
 273                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 274                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 275                 Exit(EXIT_STATUS_PID);
 276         }
 277 }
 278
 279 std::string InspIRCd::GetRevision()
 280 {
 281         return REVISION;
 282 }
 283
 284 InspIRCd::InspIRCd(int argc, char** argv)
 285         : 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)
 286 {
 287         int found_ports = 0;
 288         FailedPortList pl;
 289         int do_version = 0, do_nofork = 0, do_debug = 0, do_nolog = 0, do_root = 0;    /* flag variables */
 290         char c = 0;
 291
 292         modules.resize(255);
 293         factory.resize(255);
 294
 295         this->unregistered_count = 0;
 296
 297         this->clientlist = new user_hash();
 298         this->chanlist = new chan_hash();
 299
 300         this->Config = new ServerConfig(this);
 301
 302         this->Config->argv = argv;
 303         this->Config->argc = argc;
 304
 305         this->Config->opertypes.clear();
 306         this->Config->operclass.clear();
 307         this->SNO = new SnomaskManager(this);
 308         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 309         this->time_delta = 0;
 310         this->next_call = this->TIME + 3;
 311         srand(this->TIME);
 312
 313         *this->LogFileName = 0;
 314         strlcpy(this->ConfigFileName, CONFIG_FILE, MAXBUF);
 315
 316         struct option longopts[] =
 317         {
 318                 { "nofork",     no_argument,            &do_nofork,     1       },
 319                 { "logfile",    required_argument,      NULL,           'f'     },
 320                 { "config",     required_argument,      NULL,           'c'     },
 321                 { "debug",      no_argument,            &do_debug,      1       },
 322                 { "nolog",      no_argument,            &do_nolog,      1       },
 323                 { "runasroot",  no_argument,            &do_root,       1       },
 324                 { "version",    no_argument,            &do_version,    1       },
 325                 { 0, 0, 0, 0 }
 326         };
 327
 328         while ((c = getopt_long_only(argc, argv, ":f:", longopts, NULL)) != -1)
 329         {
 330                 switch (c)
 331                 {
 332                         case 'f':
 333                                 /* Log filename was set */
 334                                 strlcpy(LogFileName, optarg, MAXBUF);
 335                                 printf("LOG: Setting logfile to %s\n", LogFileName);
 336                         break;
 337                         case 'c':
 338                                 /* Config filename was set */
 339                                 strlcpy(ConfigFileName, optarg, MAXBUF);
 340                                 printf("CONFIG: Setting config file to %s\n", ConfigFileName);
 341                         break;
 342                         case 0:
 343                                 /* getopt_long_only() set an int variable, just keep going */
 344                         break;
 345                         default:
 346                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 347                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>] [--runasroot] [--version] [--config <config>]\n", argv[0]);
 348                                 Exit(EXIT_STATUS_ARGV);
 349                         break;
 350                 }
 351         }
 352
 353         if (do_version)
 354         {
 355                 printf("\n%s r%s\n", VERSION, REVISION);
 356                 Exit(EXIT_STATUS_NOERROR);
 357         }
 358
 359         if (!ServerConfig::FileExists(this->ConfigFileName))
 360         {
 361                 printf("ERROR: Cannot open config file: %s\nExiting...\n", this->ConfigFileName);
 362                 this->Log(DEFAULT,"Unable to open config file %s", this->ConfigFileName);
 363                 Exit(EXIT_STATUS_CONFIG);
 364         }
 365
 366         this->Start();
 367
 368         /* Set the finished argument values */
 369         Config->nofork = do_nofork;
 370         Config->forcedebug = do_debug;
 371         Config->writelog = !do_nolog;
 372
 373         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 374
 375         this->OpenLog(argv, argc);
 376
 377         this->stats = new serverstats();
 378         this->Timers = new TimerManager(this);
 379         this->Parser = new CommandParser(this);
 380         this->XLines = new XLineManager(this);
 381         Config->ClearStack();
 382         Config->Read(true, NULL);
 383
 384         if (!do_root)
 385                 this->CheckRoot();
 386         else
 387         {
 388                 printf("* WARNING * WARNING * WARNING * WARNING * WARNING * \n\n");
 389                 printf("YOU ARE RUNNING INSPIRCD AS ROOT. THIS IS UNSUPPORTED\n");
 390                 printf("AND IF YOU ARE HACKED, CRACKED, SPINDLED OR MUTILATED\n");
 391                 printf("OR ANYTHING ELSE UNEXPECTED HAPPENS TO YOU OR YOUR\n");
 392                 printf("SERVER, THEN IT IS YOUR OWN FAULT. IF YOU DID NOT MEAN\n");
 393                 printf("TO START INSPIRCD AS ROOT, HIT CTRL+C NOW AND RESTART\n");
 394                 printf("THE PROGRAM AS A NORMAL USER. YOU HAVE BEEN WARNED!\n");
 395                 printf("\nInspIRCd starting in 20 seconds, ctrl+c to abort...\n");
 396                 sleep(20);
 397         }
 398
 399         this->SetSignals();
 400
 401         if (!Config->nofork)
 402         {
 403                 if (!this->DaemonSeed())
 404                 {
 405                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 406                         Log(DEFAULT,"ERROR: could not go into daemon mode. Shutting down.");
 407                         Exit(EXIT_STATUS_FORK);
 408                 }
 409         }
 410
 411
 412         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 413          * initialize the socket engine.
 414          */
 415         SocketEngineFactory* SEF = new SocketEngineFactory();
 416         SE = SEF->Create(this);
 417         delete SEF;
 418
 419         this->Modes = new ModeParser(this);
 420         this->AddServerName(Config->ServerName);
 421         CheckDie();
 422         InitializeDisabledCommands(Config->DisabledCommands, this);
 423         int bounditems = BindPorts(true, found_ports, pl);
 424
 425         for(int t = 0; t < 255; t++)
 426                 Config->global_implementation[t] = 0;
 427
 428         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 429
 430         printf("\n");
 431
 432         this->Res = new DNS(this);
 433
 434         this->LoadAllModules();
 435         /* Just in case no modules were loaded - fix for bug #101 */
 436         this->BuildISupport();
 437
 438         if ((Config->ports.size() == 0) && (found_ports > 0))
 439         {
 440                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 441                 Log(DEFAULT,"ERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?");
 442                 Exit(EXIT_STATUS_BIND);
 443         }
 444
 445         if (Config->ports.size() != (unsigned int)found_ports)
 446         {
 447                 printf("\nWARNING: Not all your client ports could be bound --\nstarting anyway with %d of %d client ports bound.\n\n", bounditems, found_ports);
 448                 printf("The following port(s) failed to bind:\n");
 449                 int j = 1;
 450                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 451                 {
 452                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 453                 }
 454         }
 455
 456         if (!Config->nofork)
 457         {
 458                 if (kill(getppid(), SIGTERM) == -1)
 459                 {
 460                         printf("Error killing parent process: %s\n",strerror(errno));
 461                         Log(DEFAULT,"Error killing parent process: %s",strerror(errno));
 462                 }
 463         }
 464
 465         if (isatty(0) && isatty(1) && isatty(2))
 466         {
 467                 /* We didn't start from a TTY, we must have started from a background process -
 468                  * e.g. we are restarting, or being launched by cron. Dont kill parent, and dont
 469                  * close stdin/stdout
 470                  */
 471                 if (!do_nofork)
 472                 {
 473                         fclose(stdin);
 474                         fclose(stderr);
 475                         fclose(stdout);
 476                 }
 477                 else
 478                 {
 479                         Log(DEFAULT,"Keeping pseudo-tty open as we are running in the foreground.");
 480                 }
 481         }
 482
 483         printf("\nInspIRCd is now running!\n");
 484         Log(DEFAULT,"Startup complete.");
 485
 486         this->WritePID(Config->PID);
 487 }
 488
 489 std::string InspIRCd::GetVersionString()
 490 {
 491         char versiondata[MAXBUF];
 492         char dnsengine[] = "singlethread-object";
 493
 494         if (*Config->CustomVersion)
 495         {
 496                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 497         }
 498         else
 499         {
 500                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%s,%s,%s]",VERSION,Config->ServerName,SYSTEM,REVISION,SE->GetName().c_str(),dnsengine);
 501         }
 502         return versiondata;
 503 }
 504
 505 char* InspIRCd::ModuleError()
 506 {
 507         return MODERR;
 508 }
 509
 510 void InspIRCd::EraseFactory(int j)
 511 {
 512         int v = 0;
 513         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 514         {
 515                 if (v == j)
 516                 {
 517                         delete *t;
 518                         factory.erase(t);
 519                         factory.push_back(NULL);
 520                         return;
 521                 }
 522                 v++;
 523         }
 524 }
 525
 526 void InspIRCd::EraseModule(int j)
 527 {
 528         int v1 = 0;
 529         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 530         {
 531                 if (v1 == j)
 532                 {
 533                         DELETE(*m);
 534                         modules.erase(m);
 535                         modules.push_back(NULL);
 536                         break;
 537                 }
 538                 v1++;
 539         }
 540         int v2 = 0;
 541         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 542         {
 543                 if (v2 == j)
 544                 {
 545                        Config->module_names.erase(v);
 546                        break;
 547                 }
 548                 v2++;
 549         }
 550
 551 }
 552
 553 void InspIRCd::MoveTo(std::string modulename,int slot)
 554 {
 555         unsigned int v2 = 256;
 556         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 557         {
 558                 if (Config->module_names[v] == modulename)
 559                 {
 560                         // found an instance, swap it with the item at the end
 561                         v2 = v;
 562                         break;
 563                 }
 564         }
 565         if ((v2 != (unsigned int)slot) && (v2 < 256))
 566         {
 567                 // Swap the module names over
 568                 Config->module_names[v2] = Config->module_names[slot];
 569                 Config->module_names[slot] = modulename;
 570                 // now swap the module factories
 571                 ircd_module* temp = factory[v2];
 572                 factory[v2] = factory[slot];
 573                 factory[slot] = temp;
 574                 // now swap the module objects
 575                 Module* temp_module = modules[v2];
 576                 modules[v2] = modules[slot];
 577                 modules[slot] = temp_module;
 578                 // now swap the implement lists (we dont
 579                 // need to swap the global or recount it)
 580                 for (int n = 0; n < 255; n++)
 581                 {
 582                         char x = Config->implement_lists[v2][n];
 583                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 584                         Config->implement_lists[slot][n] = x;
 585                 }
 586         }
 587 }
 588
 589 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 590 {
 591         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 592         {
 593                 if (Config->module_names[v] == after)
 594                 {
 595                         MoveTo(modulename, v);
 596                         return;
 597                 }
 598         }
 599 }
 600
 601 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 602 {
 603         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 604         {
 605                 if (Config->module_names[v] == before)
 606                 {
 607                         if (v > 0)
 608                         {
 609                                 MoveTo(modulename, v-1);
 610                         }
 611                         else
 612                         {
 613                                 MoveTo(modulename, v);
 614                         }
 615                         return;
 616                 }
 617         }
 618 }
 619
 620 void InspIRCd::MoveToFirst(std::string modulename)
 621 {
 622         MoveTo(modulename,0);
 623 }
 624
 625 void InspIRCd::MoveToLast(std::string modulename)
 626 {
 627         MoveTo(modulename,this->GetModuleCount());
 628 }
 629
 630 void InspIRCd::BuildISupport()
 631 {
 632         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 633         std::stringstream v;
 634         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES-1 << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << Config->MaxChans << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 635         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 636         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 637         Config->data005 = v.str();
 638         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 639         Config->Update005();
 640 }
 641
 642 bool InspIRCd::UnloadModule(const char* filename)
 643 {
 644         std::string filename_str = filename;
 645         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 646         {
 647                 if (Config->module_names[j] == filename_str)
 648                 {
 649                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 650                         {
 651                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 652                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 653                                 return false;
 654                         }
 655                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 656                         if (intercount.first > 0)
 657                         {
 658                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 659                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 660                                                 intercount.first,
 661                                                 intercount.first > 1 ? "s" : "",
 662                                                 intercount.first > 1 ? "are" : "is",
 663                                                 intercount.second.c_str());
 664                                 return false;
 665                         }
 666                         /* Give the module a chance to tidy out all its metadata */
 667                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 668                         {
 669                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 670                         }
 671                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 672                         {
 673                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 674                         }
 675
 676                         /* Tidy up any dangling resolvers */
 677                         this->Res->CleanResolvers(modules[j]);
 678
 679                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 680
 681                         for(int t = 0; t < 255; t++)
 682                         {
 683                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 684                         }
 685
 686                         /* We have to renumber implement_lists after unload because the module numbers change!
 687                          */
 688                         for(int j2 = j; j2 < 254; j2++)
 689                         {
 690                                 for(int t = 0; t < 255; t++)
 691                                 {
 692                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 693                                 }
 694                         }
 695
 696                         // found the module
 697                         Parser->RemoveCommands(filename);
 698                         this->EraseModule(j);
 699                         this->EraseFactory(j);
 700                         this->Log(DEFAULT,"Module %s unloaded",filename);
 701                         this->ModCount--;
 702                         BuildISupport();
 703                         return true;
 704                 }
 705         }
 706         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 707         snprintf(MODERR,MAXBUF,"Module not loaded");
 708         return false;
 709 }
 710
 711 bool InspIRCd::LoadModule(const char* filename)
 712 {
 713         /* Do we have a glob pattern in the filename?
 714          * The user wants to load multiple modules which
 715          * match the pattern.
 716          */
 717         if (strchr(filename,'*') || (strchr(filename,'?')))
 718         {
 719                 int n_match = 0;
 720                 DIR* library = opendir(Config->ModPath);
 721                 if (library)
 722                 {
 723                         /* Try and locate and load all modules matching the pattern */
 724                         dirent* entry = NULL;
 725                         while ((entry = readdir(library)))
 726                         {
 727                                 if (this->MatchText(entry->d_name, filename))
 728                                 {
 729                                         if (!this->LoadModule(entry->d_name))
 730                                                 n_match++;
 731                                 }
 732                         }
 733                         closedir(library);
 734                 }
 735                 /* Loadmodule will now return false if any one of the modules failed
 736                  * to load (but wont abort when it encounters a bad one) and when 1 or
 737                  * more modules were actually loaded.
 738                  */
 739                 return (n_match > 0);
 740         }
 741
 742         char modfile[MAXBUF];
 743         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 744         std::string filename_str = filename;
 745
 746         if (!ServerConfig::DirValid(modfile))
 747         {
 748                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 749                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 750                 return false;
 751         }
 752         if (ServerConfig::FileExists(modfile))
 753         {
 754
 755                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 756                 {
 757                         if (Config->module_names[j] == filename_str)
 758                         {
 759                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 760                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 761                                 return false;
 762                         }
 763                 }
 764                 try
 765                 {
 766                         ircd_module* a = new ircd_module(this, modfile);
 767                         factory[this->ModCount+1] = a;
 768                         if (factory[this->ModCount+1]->LastError())
 769                         {
 770                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 771                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 772                                 return false;
 773                         }
 774                         if ((long)factory[this->ModCount+1]->factory != -1)
 775                         {
 776                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 777
 778                                 Version v = m->GetVersion();
 779
 780                                 if (v.API != API_VERSION)
 781                                 {
 782                                         delete m;
 783                                         delete a;
 784                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 785                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 786                                         return false;
 787                                 }
 788                                 else
 789                                 {
 790                                         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]"));
 791                                 }
 792
 793                                 modules[this->ModCount+1] = m;
 794                                 /* save the module and the module's classfactory, if
 795                                  * this isnt done, random crashes can occur :/ */
 796                                 Config->module_names.push_back(filename);
 797
 798                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 799                                 for(int t = 0; t < 255; t++)
 800                                         x[t] = 0;
 801
 802                                 modules[this->ModCount+1]->Implements(x);
 803
 804                                 for(int t = 0; t < 255; t++)
 805                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 806                         }
 807                         else
 808                         {
 809                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 810                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 811                                 return false;
 812                         }
 813                 }
 814                 catch (CoreException& modexcept)
 815                 {
 816                         this->Log(DEFAULT,"Unable to load %s: %s",modfile,modexcept.GetReason());
 817                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 818                         return false;
 819                 }
 820         }
 821         else
 822         {
 823                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 824                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 825                 return false;
 826         }
 827         this->ModCount++;
 828         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 829         // now work out which modules, if any, want to move to the back of the queue,
 830         // and if they do, move them there.
 831         std::vector<std::string> put_to_back;
 832         std::vector<std::string> put_to_front;
 833         std::map<std::string,std::string> put_before;
 834         std::map<std::string,std::string> put_after;
 835         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 836         {
 837                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 838                         put_to_back.push_back(Config->module_names[j]);
 839                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 840                         put_to_front.push_back(Config->module_names[j]);
 841                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 842                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 843                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 844                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 845         }
 846         for (unsigned int j = 0; j < put_to_back.size(); j++)
 847                 MoveToLast(put_to_back[j]);
 848         for (unsigned int j = 0; j < put_to_front.size(); j++)
 849                 MoveToFirst(put_to_front[j]);
 850         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 851                 MoveBefore(j->first,j->second);
 852         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 853                 MoveAfter(j->first,j->second);
 854         BuildISupport();
 855         return true;
 856 }
 857
 858 void InspIRCd::DoOneIteration(bool process_module_sockets)
 859 {
 860         static rusage ru;
 861
 862         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 863          * Once per loop iteration is pleanty.
 864          */
 865         OLDTIME = TIME;
 866         TIME = time(NULL);
 867
 868         /* Run background module timers every few seconds
 869          * (the docs say modules shouldnt rely on accurate
 870          * timing using this event, so we dont have to
 871          * time this exactly).
 872          */
 873         if (TIME != OLDTIME)
 874         {
 875                 if (TIME < OLDTIME)
 876                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 877                 if ((TIME % 3600) == 0)
 878                 {
 879                         this->RehashUsersAndChans();
 880                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
 881                 }
 882                 Timers->TickTimers(TIME);
 883                 this->DoBackgroundUserStuff(TIME);
 884
 885                 if ((TIME % 5) == 0)
 886                 {
 887                         XLines->expire_lines();
 888                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 889                         Timers->TickMissedTimers(TIME);
 890                 }
 891
 892                 if (!getrusage(0, &ru))
 893                 {
 894                         gettimeofday(&this->stats->LastSampled, NULL);
 895                         this->stats->LastCPU = ru.ru_utime;
 896                 }
 897         }
 898
 899         /* Call the socket engine to wait on the active
 900          * file descriptors. The socket engine has everything's
 901          * descriptors in its list... dns, modules, users,
 902          * servers... so its nice and easy, just one call.
 903          * This will cause any read or write events to be
 904          * dispatched to their handlers.
 905          */
 906         SE->DispatchEvents();
 907
 908         /* if any users was quit, take them out */
 909         GlobalCulls.Apply();
 910
 911         /* If any inspsockets closed, remove them */
 912         for (std::map<InspSocket*,InspSocket*>::iterator x = SocketCull.begin(); x != SocketCull.end(); ++x)
 913         {
 914                 SE->DelFd(x->second);
 915                 x->second->Close();
 916                 delete x->second;
 917         }
 918         SocketCull.clear();
 919 }
 920
 921 int InspIRCd::Run()
 922 {
 923         while (true)
 924         {
 925                 DoOneIteration(true);
 926         }
 927         /* This is never reached -- we hope! */
 928         return 0;
 929 }
 930
 931 /**********************************************************************************/
 932
 933 /**
 934  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 935  */
 936
 937 int main(int argc, char** argv)
 938 {
 939         SI = new InspIRCd(argc, argv);
 940         SI->Run();
 941         delete SI;
 942         return 0;
 943 }
 944
 945 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 946  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 947  * registration timeout maximum seconds)
 948  */
 949 bool InspIRCd::AllModulesReportReady(userrec* user)
 950 {
 951         if (!Config->global_implementation[I_OnCheckReady])
 952                 return true;
 953
 954         for (int i = 0; i <= this->GetModuleCount(); i++)
 955         {
 956                 if (Config->implement_lists[i][I_OnCheckReady])
 957                 {
 958                         int res = modules[i]->OnCheckReady(user);
 959                         if (!res)
 960                                 return false;
 961                 }
 962         }
 963         return true;
 964 }
 965
 966 int InspIRCd::GetModuleCount()
 967 {
 968         return this->ModCount;
 969 }
 970
 971 time_t InspIRCd::Time(bool delta)
 972 {
 973         if (delta)
 974                 return TIME + time_delta;
 975         return TIME;
 976 }
 977
 978 int InspIRCd::SetTimeDelta(int delta)
 979 {
 980         int old = time_delta;
 981         time_delta = delta;
 982         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 983         return old;
 984 }
 985
 986 void InspIRCd::AddLocalClone(userrec* user)
 987 {
 988         clonemap::iterator x = local_clones.find(user->GetIPString());
 989         if (x != local_clones.end())
 990                 x->second++;
 991         else
 992                 local_clones[user->GetIPString()] = 1;
 993 }
 994
 995 void InspIRCd::AddGlobalClone(userrec* user)
 996 {
 997         clonemap::iterator y = global_clones.find(user->GetIPString());
 998         if (y != global_clones.end())
 999                 y->second++;
1000         else
1001                 global_clones[user->GetIPString()] = 1;
1002 }
1003
1004 int InspIRCd::GetTimeDelta()
1005 {
1006         return time_delta;
1007 }
1008
1009 bool FileLogger::Readable()
1010 {
1011         return false;
1012 }
1013
1014 void FileLogger::HandleEvent(EventType et, int errornum)
1015 {
1016         this->WriteLogLine("");
1017         if (log)
1018                 ServerInstance->SE->DelFd(this);
1019 }
1020
1021 void FileLogger::WriteLogLine(const std::string &line)
1022 {
1023         if (line.length())
1024                 buffer.append(line);
1025
1026         if (log)
1027         {
1028                 int written = fprintf(log,"%s",buffer.c_str());
1029                 if ((written >= 0) && (written < (int)buffer.length()))
1030                 {
1031                         buffer.erase(0, buffer.length());
1032                         ServerInstance->SE->AddFd(this);
1033                 }
1034                 else if (written == -1)
1035                 {
1036                         if (errno == EAGAIN)
1037                                 ServerInstance->SE->AddFd(this);
1038                 }
1039                 else
1040                 {
1041                         /* Wrote the whole buffer, and no need for write callback */
1042                         buffer = "";
1043                 }
1044
1045                 if (writeops++ % 20)
1046                 {
1047                         fflush(log);
1048                 }
1049         }
1050 }
1051
1052 void FileLogger::Close()
1053 {
1054         if (log)
1055         {
1056                 int flags = fcntl(fileno(log), F_GETFL, 0);
1057                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
1058                 if (buffer.size())
1059                         fprintf(log,"%s",buffer.c_str());
1060
1061                 ServerInstance->SE->DelFd(this);
1062
1063                 fflush(log);
1064                 fclose(log);
1065         }
1066
1067         buffer = "";
1068 }
1069
1070 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
1071 {
1072         if (log)
1073         {
1074                 irc::sockets::NonBlocking(fileno(log));
1075                 this->SetFd(fileno(log));
1076                 buffer = "";
1077         }
1078 }
1079
1080 FileLogger::~FileLogger()
1081 {
1082         this->Close();
1083 }
1084