src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "configreader.h"
  16 #include <signal.h>
  17 #include <dirent.h>
  18 #include <exception>
  19 #include <fstream>
  20 #include <unistd.h>
  21 #include "modules.h"
  22 #include "mode.h"
  23 #include "xline.h"
  24 #include "socketengine.h"
  25 #include "inspircd_se_config.h"
  26 #include "socket.h"
  27 #include "typedefs.h"
  28 #include "command_parse.h"
  29 #include "exitcodes.h"
  30 #include <dlfcn.h>
  31 #include <getopt.h>
  32
  33
  34 using irc::sockets::NonBlocking;
  35 using irc::sockets::Blocking;
  36 using irc::sockets::insp_ntoa;
  37 using irc::sockets::insp_inaddr;
  38 using irc::sockets::insp_sockaddr;
  39
  40 InspIRCd* SI = NULL;
  41
  42 void InspIRCd::AddServerName(const std::string &servername)
  43 {
  44         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  45                 servernames.push_back(servername); /* Wasn't already there. */
  46 }
  47
  48 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  49 {
  50         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  51
  52         if(iter == servernames.end())
  53         {
  54                 AddServerName(servername);
  55                 iter = --servernames.end();
  56         }
  57
  58         return iter->c_str();
  59 }
  60
  61 bool InspIRCd::FindServerName(const std::string &servername)
  62 {
  63         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
  64 }
  65
  66 void InspIRCd::Exit(int status)
  67 {
  68         if (SI)
  69         {
  70                 SI->SendError("Exiting with status " + ConvToStr(status) + " (" + std::string(ExitCodes[status]) + ")");
  71                 SI->Cleanup();
  72         }
  73         exit (status);
  74 }
  75
  76 void InspIRCd::Cleanup()
  77 {
  78         std::vector<std::string> mymodnames;
  79         int MyModCount = this->GetModuleCount();
  80
  81         for (unsigned int i = 0; i < stats->BoundPortCount; i++)
  82         {
  83                 /* This calls the constructor and closes the listening socket */
  84                 delete Config->openSockfd[i];
  85                 Config->openSockfd[i] = NULL;
  86         }
  87         stats->BoundPortCount = 0;
  88
  89         /* Close all client sockets, or the new process inherits them */
  90         for (std::vector<userrec*>::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
  91         {
  92                 (*i)->SetWriteError("Server shutdown");
  93                 (*i)->CloseSocket();
  94         }
  95
  96         /* We do this more than once, so that any service providers get a
  97          * chance to be unhooked by the modules using them, but then get
  98          * a chance to be removed themsleves.
  99          */
 100         for (int tries = 0; tries < 3; tries++)
 101         {
 102                 MyModCount = this->GetModuleCount();
 103                 mymodnames.clear();
 104
 105                 /* Unload all modules, so they get a chance to clean up their listeners */
 106                 for (int j = 0; j <= MyModCount; j++)
 107                         mymodnames.push_back(Config->module_names[j]);
 108
 109                 for (int k = 0; k <= MyModCount; k++)
 110                         this->UnloadModule(mymodnames[k].c_str());
 111         }
 112
 113         /* Close logging */
 114         this->Logger->Close();
 115 }
 116
 117 void InspIRCd::Restart(const std::string &reason)
 118 {
 119         /* SendError flushes each client's queue,
 120          * regardless of writeability state
 121          */
 122         this->SendError(reason);
 123
 124         this->Cleanup();
 125
 126         /* Figure out our filename (if theyve renamed it, we're boned) */
 127         std::string me = Config->MyDir + "/inspircd";
 128
 129         if (execv(me.c_str(), Config->argv) == -1)
 130         {
 131                 /* Will raise a SIGABRT if not trapped */
 132                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 133         }
 134 }
 135
 136 void InspIRCd::Start()
 137 {
 138         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 139         printf("(C) InspIRCd Development Team.\033[0m\n\n");
 140         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey\033[0m\n");
 141         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 142 }
 143
 144 void InspIRCd::Rehash(int status)
 145 {
 146         SI->WriteOpers("*** Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(SI->ConfigFileName));
 147         SI->CloseLog();
 148         SI->OpenLog(SI->Config->argv, SI->Config->argc);
 149         SI->RehashUsersAndChans();
 150         FOREACH_MOD_I(SI, I_OnGarbageCollect, OnGarbageCollect());
 151         SI->Config->Read(false,NULL);
 152         SI->ResetMaxBans();
 153         SI->Res->Rehash();
 154         SI->BuildISupport();
 155         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(NULL,""));
 156 }
 157
 158 void InspIRCd::ResetMaxBans()
 159 {
 160         for (chan_hash::const_iterator i = chanlist->begin(); i != chanlist->end(); i++)
 161                 i->second->ResetMaxBans();
 162 }
 163
 164
 165 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 166  * we must occasionally rehash the hash (yes really).
 167  * We do this by copying the entries from the old hash to a new hash, causing all
 168  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 169  * very expensive, so instead we do it when the user types /REHASH and expects a
 170  * short delay anyway.
 171  */
 172 void InspIRCd::RehashUsersAndChans()
 173 {
 174         user_hash* old_users = this->clientlist;
 175         chan_hash* old_chans = this->chanlist;
 176
 177         this->clientlist = new user_hash();
 178         this->chanlist = new chan_hash();
 179
 180         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 181                 this->clientlist->insert(*n);
 182
 183         delete old_users;
 184
 185         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 186                 this->chanlist->insert(*n);
 187
 188         delete old_chans;
 189 }
 190
 191 void InspIRCd::CloseLog()
 192 {
 193         this->Logger->Close();
 194 }
 195
 196 void InspIRCd::SetSignals()
 197 {
 198         signal(SIGALRM, SIG_IGN);
 199         signal(SIGHUP, InspIRCd::Rehash);
 200         signal(SIGPIPE, SIG_IGN);
 201         signal(SIGTERM, InspIRCd::Exit);
 202         signal(SIGCHLD, SIG_IGN);
 203 }
 204
 205 void InspIRCd::QuickExit(int status)
 206 {
 207         exit(0);
 208 }
 209
 210 bool InspIRCd::DaemonSeed()
 211 {
 212         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_nofork = 0, do_debug = 0, do_nolog = 0, do_restart = 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->Start();
 309         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 310         this->time_delta = 0;
 311         this->next_call = this->TIME + 3;
 312         srand(this->TIME);
 313
 314         *this->LogFileName = 0;
 315         strlcpy(this->ConfigFileName, CONFIG_FILE, MAXBUF);
 316
 317         struct option longopts[] =
 318         {
 319                 { "nofork",     no_argument,            &do_nofork,     1       },
 320                 { "logfile",    required_argument,      NULL,           'f'     },
 321                 { "config",     required_argument,      NULL,           'c'     },
 322                 { "debug",      no_argument,            &do_debug,      1       },
 323                 { "nolog",      no_argument,            &do_nolog,      1       },
 324                 { "restart",    no_argument,            &do_restart,    1       },
 325                 { "runasroot",  no_argument,            &do_root,       1       },
 326                 { 0, 0, 0, 0 }
 327         };
 328
 329         while ((c = getopt_long_only(argc, argv, ":f:", longopts, NULL)) != -1)
 330         {
 331                 switch (c)
 332                 {
 333                         case 'f':
 334                                 /* Log filename was set */
 335                                 strlcpy(LogFileName, optarg, MAXBUF);
 336                                 printf("LOG: Setting logfile to %s\n", LogFileName);
 337                         break;
 338                         case 'c':
 339                                 /* Config filename was set */
 340                                 strlcpy(ConfigFileName, optarg, MAXBUF);
 341                                 printf("CONFIG: Setting config file to %s\n", ConfigFileName);
 342                         break;
 343                         case 0:
 344                                 /* getopt_long_only() set an int variable, just keep going */
 345                         break;
 346                         default:
 347                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 348                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>] [--restart]\n", argv[0]);
 349                                 Exit(EXIT_STATUS_ARGV);
 350                         break;
 351                 }
 352         }
 353
 354         if (!ServerConfig::FileExists(this->ConfigFileName))
 355         {
 356                 printf("ERROR: Cannot open config file: %s\nExiting...\n", this->ConfigFileName);
 357                 this->Log(DEFAULT,"Unable to open config file %s", this->ConfigFileName);
 358                 Exit(EXIT_STATUS_CONFIG);
 359         }
 360
 361         /* Set the finished argument values */
 362         Config->nofork = do_nofork;
 363         Config->forcedebug = do_debug;
 364         Config->writelog = !do_nolog;
 365
 366         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 367
 368         this->OpenLog(argv, argc);
 369         this->stats = new serverstats();
 370         this->Timers = new TimerManager(this);
 371         this->Parser = new CommandParser(this);
 372         this->XLines = new XLineManager(this);
 373         Config->ClearStack();
 374         Config->Read(true, NULL);
 375
 376         if (!do_root)
 377                 this->CheckRoot();
 378         else
 379         {
 380                 printf("* WARNING * WARNING * WARNING * WARNING * WARNING * \n\n");
 381                 printf("YOU ARE RUNNING INSPIRCD AS ROOT. THIS IS UNSUPPORTED\n");
 382                 printf("AND IF YOU ARE HACKED, CRACKED, SPINDLED OR MUTILATED\n");
 383                 printf("OR ANYTHING ELSE UNEXPECTED HAPPENS TO YOU OR YOUR\n");
 384                 printf("SERVER, THEN IT IS YOUR OWN FAULT. IF YOU DID NOT MEAN\n");
 385                 printf("TO START INSPIRCD AS ROOT, HIT CTRL+C NOW AND RESTART\n");
 386                 printf("THE PROGRAM AS A NORMAL USER. YOU HAVE BEEN WARNED!\n");
 387                 printf("\nInspIRCd starting in 20 seconds, ctrl+c to abort...\n");
 388                 sleep(20);
 389         }
 390
 391         this->Modes = new ModeParser(this);
 392         this->AddServerName(Config->ServerName);
 393         CheckDie();
 394         InitializeDisabledCommands(Config->DisabledCommands, this);
 395         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 396
 397         for(int t = 0; t < 255; t++)
 398                 Config->global_implementation[t] = 0;
 399
 400         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 401
 402         printf("\n");
 403         this->SetSignals();
 404
 405         if (!Config->nofork)
 406         {
 407                 if (!this->DaemonSeed())
 408                 {
 409                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 410                         Log(DEFAULT,"ERROR: could not go into daemon mode. Shutting down.");
 411                         Exit(EXIT_STATUS_FORK);
 412                 }
 413         }
 414
 415         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 416          * initialize the socket engine.
 417          */
 418         SocketEngineFactory* SEF = new SocketEngineFactory();
 419         SE = SEF->Create(this);
 420         delete SEF;
 421
 422         this->Res = new DNS(this);
 423
 424         this->LoadAllModules();
 425         /* Just in case no modules were loaded - fix for bug #101 */
 426         this->BuildISupport();
 427
 428         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 429         {
 430                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 431                 Log(DEFAULT,"ERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?");
 432                 Exit(EXIT_STATUS_BIND);
 433         }
 434
 435         if (stats->BoundPortCount != (unsigned int)found_ports)
 436         {
 437                 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);
 438                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 439                 int j = 1;
 440                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 441                 {
 442                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 443                 }
 444         }
 445
 446         /* Add the listening sockets used for client inbound connections
 447          * to the socket engine
 448          */
 449         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 450         {
 451                 if (!SE->AddFd(Config->openSockfd[count]))
 452                 {
 453                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 454                         Log(DEFAULT,"EH? Could not add listener to socketengine. You screwed up, aborting.");
 455                         Exit(EXIT_STATUS_INTERNAL);
 456                 }
 457         }
 458
 459         if (!Config->nofork && !do_restart)
 460         {
 461                 if (kill(getppid(), SIGTERM) == -1)
 462                 {
 463                         printf("Error killing parent process: %s\n",strerror(errno));
 464                         Log(DEFAULT,"Error killing parent process: %s",strerror(errno));
 465                 }
 466
 467                 fclose(stdin);
 468                 fclose(stderr);
 469                 fclose(stdout);
 470         }
 471
 472         printf("\nInspIRCd is now running!\n");
 473         Log(DEFAULT,"Startup complete.");
 474
 475         this->WritePID(Config->PID);
 476 }
 477
 478 std::string InspIRCd::GetVersionString()
 479 {
 480         char versiondata[MAXBUF];
 481         char dnsengine[] = "singlethread-object";
 482         if (*Config->CustomVersion)
 483         {
 484                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 485         }
 486         else
 487         {
 488                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%s,%s,%s]",VERSION,Config->ServerName,SYSTEM,REVISION,SE->GetName().c_str(),dnsengine);
 489         }
 490         return versiondata;
 491 }
 492
 493 char* InspIRCd::ModuleError()
 494 {
 495         return MODERR;
 496 }
 497
 498 void InspIRCd::EraseFactory(int j)
 499 {
 500         int v = 0;
 501         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 502         {
 503                 if (v == j)
 504                 {
 505                         delete *t;
 506                         factory.erase(t);
 507                         factory.push_back(NULL);
 508                         return;
 509                 }
 510                 v++;
 511         }
 512 }
 513
 514 void InspIRCd::EraseModule(int j)
 515 {
 516         int v1 = 0;
 517         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 518         {
 519                 if (v1 == j)
 520                 {
 521                         DELETE(*m);
 522                         modules.erase(m);
 523                         modules.push_back(NULL);
 524                         break;
 525                 }
 526                 v1++;
 527         }
 528         int v2 = 0;
 529         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 530         {
 531                 if (v2 == j)
 532                 {
 533                        Config->module_names.erase(v);
 534                        break;
 535                 }
 536                 v2++;
 537         }
 538
 539 }
 540
 541 void InspIRCd::MoveTo(std::string modulename,int slot)
 542 {
 543         unsigned int v2 = 256;
 544         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 545         {
 546                 if (Config->module_names[v] == modulename)
 547                 {
 548                         // found an instance, swap it with the item at the end
 549                         v2 = v;
 550                         break;
 551                 }
 552         }
 553         if ((v2 != (unsigned int)slot) && (v2 < 256))
 554         {
 555                 // Swap the module names over
 556                 Config->module_names[v2] = Config->module_names[slot];
 557                 Config->module_names[slot] = modulename;
 558                 // now swap the module factories
 559                 ircd_module* temp = factory[v2];
 560                 factory[v2] = factory[slot];
 561                 factory[slot] = temp;
 562                 // now swap the module objects
 563                 Module* temp_module = modules[v2];
 564                 modules[v2] = modules[slot];
 565                 modules[slot] = temp_module;
 566                 // now swap the implement lists (we dont
 567                 // need to swap the global or recount it)
 568                 for (int n = 0; n < 255; n++)
 569                 {
 570                         char x = Config->implement_lists[v2][n];
 571                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 572                         Config->implement_lists[slot][n] = x;
 573                 }
 574         }
 575 }
 576
 577 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 578 {
 579         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 580         {
 581                 if (Config->module_names[v] == after)
 582                 {
 583                         MoveTo(modulename, v);
 584                         return;
 585                 }
 586         }
 587 }
 588
 589 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 590 {
 591         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 592         {
 593                 if (Config->module_names[v] == before)
 594                 {
 595                         if (v > 0)
 596                         {
 597                                 MoveTo(modulename, v-1);
 598                         }
 599                         else
 600                         {
 601                                 MoveTo(modulename, v);
 602                         }
 603                         return;
 604                 }
 605         }
 606 }
 607
 608 void InspIRCd::MoveToFirst(std::string modulename)
 609 {
 610         MoveTo(modulename,0);
 611 }
 612
 613 void InspIRCd::MoveToLast(std::string modulename)
 614 {
 615         MoveTo(modulename,this->GetModuleCount());
 616 }
 617
 618 void InspIRCd::BuildISupport()
 619 {
 620         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 621         std::stringstream v;
 622         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES-1 << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << Config->MaxChans << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 623         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 624         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 625         Config->data005 = v.str();
 626         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 627         Config->Update005();
 628 }
 629
 630 bool InspIRCd::UnloadModule(const char* filename)
 631 {
 632         std::string filename_str = filename;
 633         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 634         {
 635                 if (Config->module_names[j] == filename_str)
 636                 {
 637                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 638                         {
 639                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 640                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 641                                 return false;
 642                         }
 643                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 644                         if (intercount.first > 0)
 645                         {
 646                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 647                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 648                                                 intercount.first,
 649                                                 intercount.first > 1 ? "s" : "",
 650                                                 intercount.first > 1 ? "are" : "is",
 651                                                 intercount.second.c_str());
 652                                 return false;
 653                         }
 654                         /* Give the module a chance to tidy out all its metadata */
 655                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 656                         {
 657                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 658                         }
 659                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 660                         {
 661                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 662                         }
 663
 664                         /* Tidy up any dangling resolvers */
 665                         this->Res->CleanResolvers(modules[j]);
 666
 667                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 668
 669                         for(int t = 0; t < 255; t++)
 670                         {
 671                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 672                         }
 673
 674                         /* We have to renumber implement_lists after unload because the module numbers change!
 675                          */
 676                         for(int j2 = j; j2 < 254; j2++)
 677                         {
 678                                 for(int t = 0; t < 255; t++)
 679                                 {
 680                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 681                                 }
 682                         }
 683
 684                         // found the module
 685                         Parser->RemoveCommands(filename);
 686                         this->EraseModule(j);
 687                         this->EraseFactory(j);
 688                         this->Log(DEFAULT,"Module %s unloaded",filename);
 689                         this->ModCount--;
 690                         BuildISupport();
 691                         return true;
 692                 }
 693         }
 694         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 695         snprintf(MODERR,MAXBUF,"Module not loaded");
 696         return false;
 697 }
 698
 699 bool InspIRCd::LoadModule(const char* filename)
 700 {
 701         /* Do we have a glob pattern in the filename?
 702          * The user wants to load multiple modules which
 703          * match the pattern.
 704          */
 705         if (strchr(filename,'*') || (strchr(filename,'?')))
 706         {
 707                 int n_match = 0;
 708                 DIR* library = opendir(Config->ModPath);
 709                 if (library)
 710                 {
 711                         /* Try and locate and load all modules matching the pattern */
 712                         dirent* entry = NULL;
 713                         while ((entry = readdir(library)))
 714                         {
 715                                 if (this->MatchText(entry->d_name, filename))
 716                                 {
 717                                         if (!this->LoadModule(entry->d_name))
 718                                                 n_match++;
 719                                 }
 720                         }
 721                         closedir(library);
 722                 }
 723                 /* Loadmodule will now return false if any one of the modules failed
 724                  * to load (but wont abort when it encounters a bad one) and when 1 or
 725                  * more modules were actually loaded.
 726                  */
 727                 return (n_match > 0);
 728         }
 729
 730         char modfile[MAXBUF];
 731         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 732         std::string filename_str = filename;
 733
 734         if (!ServerConfig::DirValid(modfile))
 735         {
 736                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 737                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 738                 return false;
 739         }
 740         if (ServerConfig::FileExists(modfile))
 741         {
 742
 743                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 744                 {
 745                         if (Config->module_names[j] == filename_str)
 746                         {
 747                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 748                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 749                                 return false;
 750                         }
 751                 }
 752                 try
 753                 {
 754                         ircd_module* a = new ircd_module(this, modfile);
 755                         factory[this->ModCount+1] = a;
 756                         if (factory[this->ModCount+1]->LastError())
 757                         {
 758                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 759                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 760                                 return false;
 761                         }
 762                         if ((long)factory[this->ModCount+1]->factory != -1)
 763                         {
 764                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 765
 766                                 Version v = m->GetVersion();
 767
 768                                 if (v.API != API_VERSION)
 769                                 {
 770                                         delete m;
 771                                         delete a;
 772                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 773                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 774                                         return false;
 775                                 }
 776                                 else
 777                                 {
 778                                         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]"));
 779                                 }
 780
 781                                 modules[this->ModCount+1] = m;
 782                                 /* save the module and the module's classfactory, if
 783                                  * this isnt done, random crashes can occur :/ */
 784                                 Config->module_names.push_back(filename);
 785
 786                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 787                                 for(int t = 0; t < 255; t++)
 788                                         x[t] = 0;
 789
 790                                 modules[this->ModCount+1]->Implements(x);
 791
 792                                 for(int t = 0; t < 255; t++)
 793                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 794                         }
 795                         else
 796                         {
 797                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 798                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 799                                 return false;
 800                         }
 801                 }
 802                 catch (CoreException& modexcept)
 803                 {
 804                         this->Log(DEFAULT,"Unable to load %s: %s",modfile,modexcept.GetReason());
 805                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 806                         return false;
 807                 }
 808         }
 809         else
 810         {
 811                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 812                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 813                 return false;
 814         }
 815         this->ModCount++;
 816         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 817         // now work out which modules, if any, want to move to the back of the queue,
 818         // and if they do, move them there.
 819         std::vector<std::string> put_to_back;
 820         std::vector<std::string> put_to_front;
 821         std::map<std::string,std::string> put_before;
 822         std::map<std::string,std::string> put_after;
 823         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 824         {
 825                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 826                         put_to_back.push_back(Config->module_names[j]);
 827                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 828                         put_to_front.push_back(Config->module_names[j]);
 829                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 830                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 831                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 832                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 833         }
 834         for (unsigned int j = 0; j < put_to_back.size(); j++)
 835                 MoveToLast(put_to_back[j]);
 836         for (unsigned int j = 0; j < put_to_front.size(); j++)
 837                 MoveToFirst(put_to_front[j]);
 838         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 839                 MoveBefore(j->first,j->second);
 840         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 841                 MoveAfter(j->first,j->second);
 842         BuildISupport();
 843         return true;
 844 }
 845
 846 void InspIRCd::DoOneIteration(bool process_module_sockets)
 847 {
 848         static rusage ru;
 849
 850         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 851          * Once per loop iteration is pleanty.
 852          */
 853         OLDTIME = TIME;
 854         TIME = time(NULL);
 855
 856         /* Run background module timers every few seconds
 857          * (the docs say modules shouldnt rely on accurate
 858          * timing using this event, so we dont have to
 859          * time this exactly).
 860          */
 861         if (TIME != OLDTIME)
 862         {
 863                 if (TIME < OLDTIME)
 864                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 865                 if ((TIME % 3600) == 0)
 866                 {
 867                         this->RehashUsersAndChans();
 868                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
 869                 }
 870                 Timers->TickTimers(TIME);
 871                 this->DoBackgroundUserStuff(TIME);
 872
 873                 if ((TIME % 5) == 0)
 874                 {
 875                         XLines->expire_lines();
 876                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 877                         Timers->TickMissedTimers(TIME);
 878                 }
 879
 880                 if (!getrusage(0, &ru))
 881                 {
 882                         gettimeofday(&this->stats->LastSampled, NULL);
 883                         this->stats->LastCPU = ru.ru_utime;
 884                 }
 885         }
 886
 887         /* Call the socket engine to wait on the active
 888          * file descriptors. The socket engine has everything's
 889          * descriptors in its list... dns, modules, users,
 890          * servers... so its nice and easy, just one call.
 891          * This will cause any read or write events to be
 892          * dispatched to their handlers.
 893          */
 894         SE->DispatchEvents();
 895
 896         /* if any users was quit, take them out */
 897         GlobalCulls.Apply();
 898
 899 }
 900
 901 bool InspIRCd::IsIdent(const char* n)
 902 {
 903         if (!n || !*n)
 904                 return false;
 905
 906         for (char* i = (char*)n; *i; i++)
 907         {
 908                 if ((*i >= 'A') && (*i <= '}'))
 909                 {
 910                         continue;
 911                 }
 912                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 913                 {
 914                         continue;
 915                 }
 916                 return false;
 917         }
 918         return true;
 919 }
 920
 921
 922 int InspIRCd::Run()
 923 {
 924         while (true)
 925         {
 926                 DoOneIteration(true);
 927         }
 928         /* This is never reached -- we hope! */
 929         return 0;
 930 }
 931
 932 /**********************************************************************************/
 933
 934 /**
 935  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 936  */
 937
 938 int main(int argc, char** argv)
 939 {
 940         SI = new InspIRCd(argc, argv);
 941         SI->Run();
 942         delete SI;
 943         return 0;
 944 }
 945
 946 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 947  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 948  * registration timeout maximum seconds)
 949  */
 950 bool InspIRCd::AllModulesReportReady(userrec* user)
 951 {
 952         if (!Config->global_implementation[I_OnCheckReady])
 953                 return true;
 954
 955         for (int i = 0; i <= this->GetModuleCount(); i++)
 956         {
 957                 if (Config->implement_lists[i][I_OnCheckReady])
 958                 {
 959                         int res = modules[i]->OnCheckReady(user);
 960                         if (!res)
 961                                 return false;
 962                 }
 963         }
 964         return true;
 965 }
 966
 967 int InspIRCd::GetModuleCount()
 968 {
 969         return this->ModCount;
 970 }
 971
 972 time_t InspIRCd::Time(bool delta)
 973 {
 974         if (delta)
 975                 return TIME + time_delta;
 976         return TIME;
 977 }
 978
 979 int InspIRCd::SetTimeDelta(int delta)
 980 {
 981         int old = time_delta;
 982         time_delta = delta;
 983         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 984         return old;
 985 }
 986
 987 void InspIRCd::AddLocalClone(userrec* user)
 988 {
 989         clonemap::iterator x = local_clones.find(user->GetIPString());
 990         if (x != local_clones.end())
 991                 x->second++;
 992         else
 993                 local_clones[user->GetIPString()] = 1;
 994 }
 995
 996 void InspIRCd::AddGlobalClone(userrec* user)
 997 {
 998         clonemap::iterator y = global_clones.find(user->GetIPString());
 999         if (y != global_clones.end())
1000                 y->second++;
1001         else
1002                 global_clones[user->GetIPString()] = 1;
1003 }
1004
1005 int InspIRCd::GetTimeDelta()
1006 {
1007         return time_delta;
1008 }
1009
1010 bool FileLogger::Readable()
1011 {
1012         return false;
1013 }
1014
1015 void FileLogger::HandleEvent(EventType et, int errornum)
1016 {
1017         this->WriteLogLine("");
1018         if (log)
1019                 ServerInstance->SE->DelFd(this);
1020 }
1021
1022 void FileLogger::WriteLogLine(const std::string &line)
1023 {
1024         if (line.length())
1025                 buffer.append(line);
1026
1027         if (log)
1028         {
1029                 int written = fprintf(log,"%s",buffer.c_str());
1030                 if ((written >= 0) && (written < (int)buffer.length()))
1031                 {
1032                         buffer.erase(0, buffer.length());
1033                         ServerInstance->SE->AddFd(this);
1034                 }
1035                 else if (written == -1)
1036                 {
1037                         if (errno == EAGAIN)
1038                                 ServerInstance->SE->AddFd(this);
1039                 }
1040                 else
1041                 {
1042                         /* Wrote the whole buffer, and no need for write callback */
1043                         buffer = "";
1044                 }
1045
1046                 if (writeops++ % 20)
1047                 {
1048                         fflush(log);
1049                 }
1050         }
1051 }
1052
1053 void FileLogger::Close()
1054 {
1055         if (log)
1056         {
1057                 int flags = fcntl(fileno(log), F_GETFL, 0);
1058                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
1059                 if (buffer.size())
1060                         fprintf(log,"%s",buffer.c_str());
1061
1062                 ServerInstance->SE->DelFd(this);
1063
1064                 fflush(log);
1065                 fclose(log);
1066         }
1067
1068         buffer = "";
1069 }
1070
1071 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
1072 {
1073         if (log)
1074         {
1075                 irc::sockets::NonBlocking(fileno(log));
1076                 this->SetFd(fileno(log));
1077                 buffer = "";
1078         }
1079 }
1080
1081 FileLogger::~FileLogger()
1082 {
1083         this->Close();
1084 }
1085