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         char* argv[10];
 130         int endp = 2;
 131         argv[0] = Config->argv[0];
 132         argv[1] = "--restart";
 133         if (Config->forcedebug)
 134                 argv[endp++] = "--debug";
 135         if (Config->nofork)
 136                 argv[endp++] = "--nofork";
 137         if (!Config->writelog)
 138                 argv[endp++] = "--nolog";
 139         if (*this->LogFileName)
 140         {
 141                 argv[endp++] = "--logfile";
 142                 argv[endp++] = this->LogFileName;
 143         }
 144
 145         argv[endp] = NULL;
 146
 147         if (execv(me.c_str(), argv) == -1)
 148         {
 149                 /* Will raise a SIGABRT if not trapped */
 150                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 151         }
 152 }
 153
 154 void InspIRCd::Start()
 155 {
 156         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 157         printf("(C) InspIRCd Development Team.\033[0m\n\n");
 158         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey\033[0m\n");
 159         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 160 }
 161
 162 void InspIRCd::Rehash(int status)
 163 {
 164         SI->WriteOpers("*** Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(SI->ConfigFileName));
 165         SI->CloseLog();
 166         SI->OpenLog(SI->Config->argv, SI->Config->argc);
 167         SI->RehashUsersAndChans();
 168         FOREACH_MOD_I(SI, I_OnGarbageCollect, OnGarbageCollect());
 169         SI->Config->Read(false,NULL);
 170         SI->ResetMaxBans();
 171         SI->Res->Rehash();
 172         SI->BuildISupport();
 173         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(NULL,""));
 174 }
 175
 176 void InspIRCd::ResetMaxBans()
 177 {
 178         for (chan_hash::const_iterator i = chanlist->begin(); i != chanlist->end(); i++)
 179                 i->second->ResetMaxBans();
 180 }
 181
 182
 183 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 184  * we must occasionally rehash the hash (yes really).
 185  * We do this by copying the entries from the old hash to a new hash, causing all
 186  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 187  * very expensive, so instead we do it when the user types /REHASH and expects a
 188  * short delay anyway.
 189  */
 190 void InspIRCd::RehashUsersAndChans()
 191 {
 192         user_hash* old_users = this->clientlist;
 193         chan_hash* old_chans = this->chanlist;
 194
 195         this->clientlist = new user_hash();
 196         this->chanlist = new chan_hash();
 197
 198         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 199                 this->clientlist->insert(*n);
 200
 201         delete old_users;
 202
 203         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 204                 this->chanlist->insert(*n);
 205
 206         delete old_chans;
 207 }
 208
 209 void InspIRCd::CloseLog()
 210 {
 211         this->Logger->Close();
 212 }
 213
 214 void InspIRCd::SetSignals()
 215 {
 216         signal(SIGALRM, SIG_IGN);
 217         signal(SIGHUP, InspIRCd::Rehash);
 218         signal(SIGPIPE, SIG_IGN);
 219         signal(SIGTERM, InspIRCd::Exit);
 220         signal(SIGCHLD, SIG_IGN);
 221 }
 222
 223 void InspIRCd::QuickExit(int status)
 224 {
 225         exit(0);
 226 }
 227
 228 bool InspIRCd::DaemonSeed()
 229 {
 230         int childpid;
 231         if ((childpid = fork ()) < 0)
 232                 return false;
 233         else if (childpid > 0)
 234         {
 235                 /* We wait here for the child process to kill us,
 236                  * so that the shell prompt doesnt come back over
 237                  * the output.
 238                  * Sending a kill with a signal of 0 just checks
 239                  * if the child pid is still around. If theyre not,
 240                  * they threw an error and we should give up.
 241                  */
 242                 signal(SIGTERM, InspIRCd::QuickExit);
 243                 while (kill(childpid, 0) != -1)
 244                         sleep(1);
 245                 exit(0);
 246         }
 247         setsid ();
 248         umask (007);
 249         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 250
 251         rlimit rl;
 252         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 253         {
 254                 this->Log(DEFAULT,"Failed to getrlimit()!");
 255                 return false;
 256         }
 257         else
 258         {
 259                 rl.rlim_cur = rl.rlim_max;
 260                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 261                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 262         }
 263
 264         return true;
 265 }
 266
 267 void InspIRCd::WritePID(const std::string &filename)
 268 {
 269         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 270         if (*(fname.begin()) != '/')
 271         {
 272                 std::string::size_type pos;
 273                 std::string confpath = this->ConfigFileName;
 274                 if ((pos = confpath.rfind("/")) != std::string::npos)
 275                 {
 276                         /* Leaves us with just the path */
 277                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 278                 }
 279         }
 280         std::ofstream outfile(fname.c_str());
 281         if (outfile.is_open())
 282         {
 283                 outfile << getpid();
 284                 outfile.close();
 285         }
 286         else
 287         {
 288                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 289                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 290                 Exit(EXIT_STATUS_PID);
 291         }
 292 }
 293
 294 std::string InspIRCd::GetRevision()
 295 {
 296         return REVISION;
 297 }
 298
 299 InspIRCd::InspIRCd(int argc, char** argv)
 300         : 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)
 301 {
 302         int found_ports = 0;
 303         FailedPortList pl;
 304         int do_nofork = 0, do_debug = 0, do_nolog = 0, do_restart = 0;    /* flag variables */
 305         char c = 0;
 306
 307         modules.resize(255);
 308         factory.resize(255);
 309
 310         this->unregistered_count = 0;
 311
 312         this->clientlist = new user_hash();
 313         this->chanlist = new chan_hash();
 314
 315         this->Config = new ServerConfig(this);
 316
 317         this->Config->argv = argv;
 318         this->Config->argc = argc;
 319
 320         this->Config->opertypes.clear();
 321         this->Config->operclass.clear();
 322         this->SNO = new SnomaskManager(this);
 323         this->Start();
 324         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 325         this->time_delta = 0;
 326         this->next_call = this->TIME + 3;
 327         srand(this->TIME);
 328
 329         *this->LogFileName = 0;
 330         strlcpy(this->ConfigFileName, CONFIG_FILE, MAXBUF);
 331
 332         struct option longopts[] =
 333         {
 334                 { "nofork",     no_argument,            &do_nofork,     1       },
 335                 { "logfile",    required_argument,      NULL,           'f'     },
 336                 { "config",     required_argument,      NULL,           'c'     },
 337                 { "debug",      no_argument,            &do_debug,      1       },
 338                 { "nolog",      no_argument,            &do_nolog,      1       },
 339                 { "restart",    no_argument,            &do_restart,    1       },
 340                 { 0, 0, 0, 0 }
 341         };
 342
 343         while ((c = getopt_long_only(argc, argv, ":f:", longopts, NULL)) != -1)
 344         {
 345                 switch (c)
 346                 {
 347                         case 'f':
 348                                 /* Log filename was set */
 349                                 strlcpy(LogFileName, optarg, MAXBUF);
 350                                 printf("LOG: Setting logfile to %s\n", LogFileName);
 351                         break;
 352                         case 'c':
 353                                 /* Config filename was set */
 354                                 strlcpy(ConfigFileName, optarg, MAXBUF);
 355                                 printf("CONFIG: Setting config file to %s\n", ConfigFileName);
 356                         break;
 357                         case 0:
 358                                 /* getopt_long_only() set an int variable, just keep going */
 359                         break;
 360                         default:
 361                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 362                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>] [--restart]\n", argv[0]);
 363                                 Exit(EXIT_STATUS_ARGV);
 364                         break;
 365                 }
 366         }
 367
 368         if (!ServerConfig::FileExists(this->ConfigFileName))
 369         {
 370                 printf("ERROR: Cannot open config file: %s\nExiting...\n", this->ConfigFileName);
 371                 this->Log(DEFAULT,"Unable to open config file %s", this->ConfigFileName);
 372                 Exit(EXIT_STATUS_CONFIG);
 373         }
 374
 375         /* Set the finished argument values */
 376         Config->nofork = do_nofork;
 377         Config->forcedebug = do_debug;
 378         Config->writelog = !do_nolog;
 379
 380         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 381
 382         this->OpenLog(argv, argc);
 383         this->stats = new serverstats();
 384         this->Timers = new TimerManager(this);
 385         this->Parser = new CommandParser(this);
 386         this->XLines = new XLineManager(this);
 387         Config->ClearStack();
 388         Config->Read(true, NULL);
 389         this->CheckRoot();
 390         this->Modes = new ModeParser(this);
 391         this->AddServerName(Config->ServerName);
 392         CheckDie();
 393         InitializeDisabledCommands(Config->DisabledCommands, this);
 394         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 395
 396         for(int t = 0; t < 255; t++)
 397                 Config->global_implementation[t] = 0;
 398
 399         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 400
 401         printf("\n");
 402         this->SetSignals();
 403
 404         if (!Config->nofork)
 405         {
 406                 if (!this->DaemonSeed())
 407                 {
 408                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 409                         Log(DEFAULT,"ERROR: could not go into daemon mode. Shutting down.");
 410                         Exit(EXIT_STATUS_FORK);
 411                 }
 412         }
 413
 414         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 415          * initialize the socket engine.
 416          */
 417         SocketEngineFactory* SEF = new SocketEngineFactory();
 418         SE = SEF->Create(this);
 419         delete SEF;
 420
 421         this->Res = new DNS(this);
 422
 423         this->LoadAllModules();
 424         /* Just in case no modules were loaded - fix for bug #101 */
 425         this->BuildISupport();
 426
 427         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 428         {
 429                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 430                 Log(DEFAULT,"ERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?");
 431                 Exit(EXIT_STATUS_BIND);
 432         }
 433
 434         if (stats->BoundPortCount != (unsigned int)found_ports)
 435         {
 436                 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);
 437                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 438                 int j = 1;
 439                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 440                 {
 441                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 442                 }
 443         }
 444
 445         /* Add the listening sockets used for client inbound connections
 446          * to the socket engine
 447          */
 448         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 449         {
 450                 if (!SE->AddFd(Config->openSockfd[count]))
 451                 {
 452                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 453                         Log(DEFAULT,"EH? Could not add listener to socketengine. You screwed up, aborting.");
 454                         Exit(EXIT_STATUS_INTERNAL);
 455                 }
 456         }
 457
 458         if (!Config->nofork && !do_restart)
 459         {
 460                 if (kill(getppid(), SIGTERM) == -1)
 461                 {
 462                         printf("Error killing parent process: %s\n",strerror(errno));
 463                         Log(DEFAULT,"Error killing parent process: %s",strerror(errno));
 464                 }
 465
 466                 fclose(stdin);
 467                 fclose(stderr);
 468                 fclose(stdout);
 469         }
 470
 471         printf("\nInspIRCd is now running!\n");
 472         Log(DEFAULT,"Startup complete.");
 473
 474         this->WritePID(Config->PID);
 475 }
 476
 477 std::string InspIRCd::GetVersionString()
 478 {
 479         char versiondata[MAXBUF];
 480         char dnsengine[] = "singlethread-object";
 481         if (*Config->CustomVersion)
 482         {
 483                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 484         }
 485         else
 486         {
 487                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%s,%s,%s]",VERSION,Config->ServerName,SYSTEM,REVISION,SE->GetName().c_str(),dnsengine);
 488         }
 489         return versiondata;
 490 }
 491
 492 char* InspIRCd::ModuleError()
 493 {
 494         return MODERR;
 495 }
 496
 497 void InspIRCd::EraseFactory(int j)
 498 {
 499         int v = 0;
 500         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 501         {
 502                 if (v == j)
 503                 {
 504                         delete *t;
 505                         factory.erase(t);
 506                         factory.push_back(NULL);
 507                         return;
 508                 }
 509                 v++;
 510         }
 511 }
 512
 513 void InspIRCd::EraseModule(int j)
 514 {
 515         int v1 = 0;
 516         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 517         {
 518                 if (v1 == j)
 519                 {
 520                         DELETE(*m);
 521                         modules.erase(m);
 522                         modules.push_back(NULL);
 523                         break;
 524                 }
 525                 v1++;
 526         }
 527         int v2 = 0;
 528         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 529         {
 530                 if (v2 == j)
 531                 {
 532                        Config->module_names.erase(v);
 533                        break;
 534                 }
 535                 v2++;
 536         }
 537
 538 }
 539
 540 void InspIRCd::MoveTo(std::string modulename,int slot)
 541 {
 542         unsigned int v2 = 256;
 543         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 544         {
 545                 if (Config->module_names[v] == modulename)
 546                 {
 547                         // found an instance, swap it with the item at the end
 548                         v2 = v;
 549                         break;
 550                 }
 551         }
 552         if ((v2 != (unsigned int)slot) && (v2 < 256))
 553         {
 554                 // Swap the module names over
 555                 Config->module_names[v2] = Config->module_names[slot];
 556                 Config->module_names[slot] = modulename;
 557                 // now swap the module factories
 558                 ircd_module* temp = factory[v2];
 559                 factory[v2] = factory[slot];
 560                 factory[slot] = temp;
 561                 // now swap the module objects
 562                 Module* temp_module = modules[v2];
 563                 modules[v2] = modules[slot];
 564                 modules[slot] = temp_module;
 565                 // now swap the implement lists (we dont
 566                 // need to swap the global or recount it)
 567                 for (int n = 0; n < 255; n++)
 568                 {
 569                         char x = Config->implement_lists[v2][n];
 570                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 571                         Config->implement_lists[slot][n] = x;
 572                 }
 573         }
 574 }
 575
 576 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 577 {
 578         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 579         {
 580                 if (Config->module_names[v] == after)
 581                 {
 582                         MoveTo(modulename, v);
 583                         return;
 584                 }
 585         }
 586 }
 587
 588 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 589 {
 590         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 591         {
 592                 if (Config->module_names[v] == before)
 593                 {
 594                         if (v > 0)
 595                         {
 596                                 MoveTo(modulename, v-1);
 597                         }
 598                         else
 599                         {
 600                                 MoveTo(modulename, v);
 601                         }
 602                         return;
 603                 }
 604         }
 605 }
 606
 607 void InspIRCd::MoveToFirst(std::string modulename)
 608 {
 609         MoveTo(modulename,0);
 610 }
 611
 612 void InspIRCd::MoveToLast(std::string modulename)
 613 {
 614         MoveTo(modulename,this->GetModuleCount());
 615 }
 616
 617 void InspIRCd::BuildISupport()
 618 {
 619         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 620         std::stringstream v;
 621         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << Config->MaxChans << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 622         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 623         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 624         Config->data005 = v.str();
 625         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 626         Config->Update005();
 627 }
 628
 629 bool InspIRCd::UnloadModule(const char* filename)
 630 {
 631         std::string filename_str = filename;
 632         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 633         {
 634                 if (Config->module_names[j] == filename_str)
 635                 {
 636                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 637                         {
 638                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 639                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 640                                 return false;
 641                         }
 642                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 643                         if (intercount.first > 0)
 644                         {
 645                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 646                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 647                                                 intercount.first,
 648                                                 intercount.first > 1 ? "s" : "",
 649                                                 intercount.first > 1 ? "are" : "is",
 650                                                 intercount.second.c_str());
 651                                 return false;
 652                         }
 653                         /* Give the module a chance to tidy out all its metadata */
 654                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 655                         {
 656                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 657                         }
 658                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 659                         {
 660                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 661                         }
 662
 663                         /* Tidy up any dangling resolvers */
 664                         this->Res->CleanResolvers(modules[j]);
 665
 666                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 667
 668                         for(int t = 0; t < 255; t++)
 669                         {
 670                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 671                         }
 672
 673                         /* We have to renumber implement_lists after unload because the module numbers change!
 674                          */
 675                         for(int j2 = j; j2 < 254; j2++)
 676                         {
 677                                 for(int t = 0; t < 255; t++)
 678                                 {
 679                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 680                                 }
 681                         }
 682
 683                         // found the module
 684                         Parser->RemoveCommands(filename);
 685                         this->EraseModule(j);
 686                         this->EraseFactory(j);
 687                         this->Log(DEFAULT,"Module %s unloaded",filename);
 688                         this->ModCount--;
 689                         BuildISupport();
 690                         return true;
 691                 }
 692         }
 693         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 694         snprintf(MODERR,MAXBUF,"Module not loaded");
 695         return false;
 696 }
 697
 698 bool InspIRCd::LoadModule(const char* filename)
 699 {
 700         /* Do we have a glob pattern in the filename?
 701          * The user wants to load multiple modules which
 702          * match the pattern.
 703          */
 704         if (strchr(filename,'*') || (strchr(filename,'?')))
 705         {
 706                 int n_match = 0;
 707                 DIR* library = opendir(Config->ModPath);
 708                 if (library)
 709                 {
 710                         /* Try and locate and load all modules matching the pattern */
 711                         dirent* entry = NULL;
 712                         while ((entry = readdir(library)))
 713                         {
 714                                 if (this->MatchText(entry->d_name, filename))
 715                                 {
 716                                         if (!this->LoadModule(entry->d_name))
 717                                                 n_match++;
 718                                 }
 719                         }
 720                         closedir(library);
 721                 }
 722                 /* Loadmodule will now return false if any one of the modules failed
 723                  * to load (but wont abort when it encounters a bad one) and when 1 or
 724                  * more modules were actually loaded.
 725                  */
 726                 return (n_match > 0);
 727         }
 728
 729         char modfile[MAXBUF];
 730         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 731         std::string filename_str = filename;
 732
 733         if (!ServerConfig::DirValid(modfile))
 734         {
 735                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 736                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 737                 return false;
 738         }
 739         if (ServerConfig::FileExists(modfile))
 740         {
 741
 742                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 743                 {
 744                         if (Config->module_names[j] == filename_str)
 745                         {
 746                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 747                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 748                                 return false;
 749                         }
 750                 }
 751                 try
 752                 {
 753                         ircd_module* a = new ircd_module(this, modfile);
 754                         factory[this->ModCount+1] = a;
 755                         if (factory[this->ModCount+1]->LastError())
 756                         {
 757                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 758                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 759                                 return false;
 760                         }
 761                         if ((long)factory[this->ModCount+1]->factory != -1)
 762                         {
 763                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 764
 765                                 Version v = m->GetVersion();
 766
 767                                 if (v.API != API_VERSION)
 768                                 {
 769                                         delete m;
 770                                         delete a;
 771                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 772                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 773                                         return false;
 774                                 }
 775                                 else
 776                                 {
 777                                         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]"));
 778                                 }
 779
 780                                 modules[this->ModCount+1] = m;
 781                                 /* save the module and the module's classfactory, if
 782                                  * this isnt done, random crashes can occur :/ */
 783                                 Config->module_names.push_back(filename);
 784
 785                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 786                                 for(int t = 0; t < 255; t++)
 787                                         x[t] = 0;
 788
 789                                 modules[this->ModCount+1]->Implements(x);
 790
 791                                 for(int t = 0; t < 255; t++)
 792                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 793                         }
 794                         else
 795                         {
 796                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 797                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 798                                 return false;
 799                         }
 800                 }
 801                 catch (CoreException& modexcept)
 802                 {
 803                         this->Log(DEFAULT,"Unable to load %s: %s",modfile,modexcept.GetReason());
 804                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 805                         return false;
 806                 }
 807         }
 808         else
 809         {
 810                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 811                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 812                 return false;
 813         }
 814         this->ModCount++;
 815         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 816         // now work out which modules, if any, want to move to the back of the queue,
 817         // and if they do, move them there.
 818         std::vector<std::string> put_to_back;
 819         std::vector<std::string> put_to_front;
 820         std::map<std::string,std::string> put_before;
 821         std::map<std::string,std::string> put_after;
 822         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 823         {
 824                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 825                         put_to_back.push_back(Config->module_names[j]);
 826                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 827                         put_to_front.push_back(Config->module_names[j]);
 828                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 829                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 830                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 831                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 832         }
 833         for (unsigned int j = 0; j < put_to_back.size(); j++)
 834                 MoveToLast(put_to_back[j]);
 835         for (unsigned int j = 0; j < put_to_front.size(); j++)
 836                 MoveToFirst(put_to_front[j]);
 837         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 838                 MoveBefore(j->first,j->second);
 839         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 840                 MoveAfter(j->first,j->second);
 841         BuildISupport();
 842         return true;
 843 }
 844
 845 void InspIRCd::DoOneIteration(bool process_module_sockets)
 846 {
 847         static rusage ru;
 848
 849         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 850          * Once per loop iteration is pleanty.
 851          */
 852         OLDTIME = TIME;
 853         TIME = time(NULL);
 854
 855         /* Run background module timers every few seconds
 856          * (the docs say modules shouldnt rely on accurate
 857          * timing using this event, so we dont have to
 858          * time this exactly).
 859          */
 860         if (TIME != OLDTIME)
 861         {
 862                 if (TIME < OLDTIME)
 863                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 864                 if ((TIME % 3600) == 0)
 865                 {
 866                         this->RehashUsersAndChans();
 867                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
 868                 }
 869                 Timers->TickTimers(TIME);
 870                 this->DoBackgroundUserStuff(TIME);
 871
 872                 if ((TIME % 5) == 0)
 873                 {
 874                         XLines->expire_lines();
 875                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 876                         Timers->TickMissedTimers(TIME);
 877                 }
 878
 879                 if (!getrusage(0, &ru))
 880                 {
 881                         gettimeofday(&this->stats->LastSampled, NULL);
 882                         this->stats->LastCPU = ru.ru_utime;
 883                 }
 884         }
 885
 886         /* Call the socket engine to wait on the active
 887          * file descriptors. The socket engine has everything's
 888          * descriptors in its list... dns, modules, users,
 889          * servers... so its nice and easy, just one call.
 890          * This will cause any read or write events to be
 891          * dispatched to their handlers.
 892          */
 893         SE->DispatchEvents();
 894
 895         /* if any users was quit, take them out */
 896         GlobalCulls.Apply();
 897
 898 }
 899
 900 bool InspIRCd::IsIdent(const char* n)
 901 {
 902         if (!n || !*n)
 903                 return false;
 904
 905         for (char* i = (char*)n; *i; i++)
 906         {
 907                 if ((*i >= 'A') && (*i <= '}'))
 908                 {
 909                         continue;
 910                 }
 911                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 912                 {
 913                         continue;
 914                 }
 915                 return false;
 916         }
 917         return true;
 918 }
 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