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(CONFIG_FILE));
 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 bool InspIRCd::DaemonSeed()
 224 {
 225         int childpid;
 226         if ((childpid = fork ()) < 0)
 227                 return false;
 228         else if (childpid > 0)
 229         {
 230                 /* We wait here for the child process to kill us,
 231                  * so that the shell prompt doesnt come back over
 232                  * the output.
 233                  * Sending a kill with a signal of 0 just checks
 234                  * if the child pid is still around. If theyre not,
 235                  * they threw an error and we should give up.
 236                  */
 237                 while (kill(childpid, 0) != -1)
 238                         sleep(1);
 239                 exit(0);
 240         }
 241         setsid ();
 242         umask (007);
 243         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 244
 245         rlimit rl;
 246         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 247         {
 248                 this->Log(DEFAULT,"Failed to getrlimit()!");
 249                 return false;
 250         }
 251         else
 252         {
 253                 rl.rlim_cur = rl.rlim_max;
 254                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 255                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 256         }
 257
 258         return true;
 259 }
 260
 261 void InspIRCd::WritePID(const std::string &filename)
 262 {
 263         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 264         if (*(fname.begin()) != '/')
 265         {
 266                 std::string::size_type pos;
 267                 std::string confpath = CONFIG_FILE;
 268                 if ((pos = confpath.find("/inspircd.conf")) != std::string::npos)
 269                 {
 270                         /* Leaves us with just the path */
 271                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 272                 }
 273         }
 274         std::ofstream outfile(fname.c_str());
 275         if (outfile.is_open())
 276         {
 277                 outfile << getpid();
 278                 outfile.close();
 279         }
 280         else
 281         {
 282                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 283                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 284                 Exit(EXIT_STATUS_PID);
 285         }
 286 }
 287
 288 std::string InspIRCd::GetRevision()
 289 {
 290         return REVISION;
 291 }
 292
 293 InspIRCd::InspIRCd(int argc, char** argv)
 294         : 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)
 295 {
 296         int found_ports = 0;
 297         FailedPortList pl;
 298         int do_nofork = 0, do_debug = 0, do_nolog = 0, do_restart = 0;    /* flag variables */
 299         char c = 0;
 300
 301         modules.resize(255);
 302         factory.resize(255);
 303
 304         this->unregistered_count = 0;
 305
 306         this->clientlist = new user_hash();
 307         this->chanlist = new chan_hash();
 308
 309         this->Config = new ServerConfig(this);
 310
 311         this->Config->argv = argv;
 312         this->Config->argc = argc;
 313
 314         this->Config->opertypes.clear();
 315         this->Config->operclass.clear();
 316         this->SNO = new SnomaskManager(this);
 317         this->Start();
 318         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 319         this->time_delta = 0;
 320         this->next_call = this->TIME + 3;
 321         srand(this->TIME);
 322
 323         if (!ServerConfig::FileExists(CONFIG_FILE))
 324         {
 325                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 326                 this->Log(DEFAULT,"main: no config");
 327                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 328                 Exit(EXIT_STATUS_CONFIG);
 329         }
 330
 331         *this->LogFileName = 0;
 332
 333         struct option longopts[] =
 334         {
 335                 { "nofork",     no_argument,            &do_nofork,     1       },
 336                 { "logfile",    required_argument,      NULL,           'f'     },
 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 0:
 353                                 /* getopt_long_only() set an int variable, just keep going */
 354                         break;
 355                         default:
 356                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 357                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>] [--restart]\n", argv[0]);
 358                                 Exit(EXIT_STATUS_ARGV);
 359                         break;
 360                 }
 361         }
 362
 363         /* Set the finished argument values */
 364         Config->nofork = do_nofork;
 365         Config->forcedebug = do_debug;
 366         Config->writelog = !do_nolog;
 367
 368         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 369
 370         this->OpenLog(argv, argc);
 371         this->stats = new serverstats();
 372         this->Timers = new TimerManager(this);
 373         this->Parser = new CommandParser(this);
 374         this->XLines = new XLineManager(this);
 375         Config->ClearStack();
 376         Config->Read(true, NULL);
 377         this->CheckRoot();
 378         this->Modes = new ModeParser(this);
 379         this->AddServerName(Config->ServerName);
 380         CheckDie();
 381         InitializeDisabledCommands(Config->DisabledCommands, this);
 382         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 383
 384         for(int t = 0; t < 255; t++)
 385                 Config->global_implementation[t] = 0;
 386
 387         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 388
 389         printf("\n");
 390         this->SetSignals();
 391
 392         if (!Config->nofork)
 393         {
 394                 if (!this->DaemonSeed())
 395                 {
 396                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 397                         Log(DEFAULT,"ERROR: could not go into daemon mode. Shutting down.");
 398                         Exit(EXIT_STATUS_FORK);
 399                 }
 400         }
 401
 402         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 403          * initialize the socket engine.
 404          */
 405         SocketEngineFactory* SEF = new SocketEngineFactory();
 406         SE = SEF->Create(this);
 407         delete SEF;
 408
 409         this->Res = new DNS(this);
 410
 411         this->LoadAllModules();
 412         /* Just in case no modules were loaded - fix for bug #101 */
 413         this->BuildISupport();
 414
 415         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 416         {
 417                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 418                 Log(DEFAULT,"ERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?");
 419                 Exit(EXIT_STATUS_BIND);
 420         }
 421
 422         if (stats->BoundPortCount != (unsigned int)found_ports)
 423         {
 424                 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);
 425                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 426                 int j = 1;
 427                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 428                 {
 429                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 430                 }
 431         }
 432
 433         /* Add the listening sockets used for client inbound connections
 434          * to the socket engine
 435          */
 436         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 437         {
 438                 if (!SE->AddFd(Config->openSockfd[count]))
 439                 {
 440                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 441                         Log(DEFAULT,"EH? Could not add listener to socketengine. You screwed up, aborting.");
 442                         Exit(EXIT_STATUS_INTERNAL);
 443                 }
 444         }
 445
 446         if (!Config->nofork && !do_restart)
 447         {
 448                 int closed = 0;
 449
 450                 if (kill(getppid(), SIGTERM) == -1)
 451                 {
 452                         printf("Error killing parent process: %s\n",strerror(errno));
 453                         Log(DEFAULT,"Error killing parent process: %s",strerror(errno));
 454                 }
 455
 456                 fclose(stdin);
 457                 fclose(stderr);
 458                 fclose(stdout);
 459         }
 460
 461         printf("\nInspIRCd is now running!\n");
 462         Log(DEFAULT,"Startup complete.");
 463
 464         this->WritePID(Config->PID);
 465 }
 466
 467 std::string InspIRCd::GetVersionString()
 468 {
 469         char versiondata[MAXBUF];
 470         char dnsengine[] = "singlethread-object";
 471         if (*Config->CustomVersion)
 472         {
 473                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 474         }
 475         else
 476         {
 477                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%s,%s,%s]",VERSION,Config->ServerName,SYSTEM,REVISION,SE->GetName().c_str(),dnsengine);
 478         }
 479         return versiondata;
 480 }
 481
 482 char* InspIRCd::ModuleError()
 483 {
 484         return MODERR;
 485 }
 486
 487 void InspIRCd::EraseFactory(int j)
 488 {
 489         int v = 0;
 490         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 491         {
 492                 if (v == j)
 493                 {
 494                         delete *t;
 495                         factory.erase(t);
 496                         factory.push_back(NULL);
 497                         return;
 498                 }
 499                 v++;
 500         }
 501 }
 502
 503 void InspIRCd::EraseModule(int j)
 504 {
 505         int v1 = 0;
 506         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 507         {
 508                 if (v1 == j)
 509                 {
 510                         DELETE(*m);
 511                         modules.erase(m);
 512                         modules.push_back(NULL);
 513                         break;
 514                 }
 515                 v1++;
 516         }
 517         int v2 = 0;
 518         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 519         {
 520                 if (v2 == j)
 521                 {
 522                        Config->module_names.erase(v);
 523                        break;
 524                 }
 525                 v2++;
 526         }
 527
 528 }
 529
 530 void InspIRCd::MoveTo(std::string modulename,int slot)
 531 {
 532         unsigned int v2 = 256;
 533         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 534         {
 535                 if (Config->module_names[v] == modulename)
 536                 {
 537                         // found an instance, swap it with the item at the end
 538                         v2 = v;
 539                         break;
 540                 }
 541         }
 542         if ((v2 != (unsigned int)slot) && (v2 < 256))
 543         {
 544                 // Swap the module names over
 545                 Config->module_names[v2] = Config->module_names[slot];
 546                 Config->module_names[slot] = modulename;
 547                 // now swap the module factories
 548                 ircd_module* temp = factory[v2];
 549                 factory[v2] = factory[slot];
 550                 factory[slot] = temp;
 551                 // now swap the module objects
 552                 Module* temp_module = modules[v2];
 553                 modules[v2] = modules[slot];
 554                 modules[slot] = temp_module;
 555                 // now swap the implement lists (we dont
 556                 // need to swap the global or recount it)
 557                 for (int n = 0; n < 255; n++)
 558                 {
 559                         char x = Config->implement_lists[v2][n];
 560                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 561                         Config->implement_lists[slot][n] = x;
 562                 }
 563         }
 564 }
 565
 566 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 567 {
 568         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 569         {
 570                 if (Config->module_names[v] == after)
 571                 {
 572                         MoveTo(modulename, v);
 573                         return;
 574                 }
 575         }
 576 }
 577
 578 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 579 {
 580         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 581         {
 582                 if (Config->module_names[v] == before)
 583                 {
 584                         if (v > 0)
 585                         {
 586                                 MoveTo(modulename, v-1);
 587                         }
 588                         else
 589                         {
 590                                 MoveTo(modulename, v);
 591                         }
 592                         return;
 593                 }
 594         }
 595 }
 596
 597 void InspIRCd::MoveToFirst(std::string modulename)
 598 {
 599         MoveTo(modulename,0);
 600 }
 601
 602 void InspIRCd::MoveToLast(std::string modulename)
 603 {
 604         MoveTo(modulename,this->GetModuleCount());
 605 }
 606
 607 void InspIRCd::BuildISupport()
 608 {
 609         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 610         std::stringstream v;
 611         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << Config->MaxChans << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 612         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 613         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 614         Config->data005 = v.str();
 615         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 616         Config->Update005();
 617 }
 618
 619 bool InspIRCd::UnloadModule(const char* filename)
 620 {
 621         std::string filename_str = filename;
 622         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 623         {
 624                 if (Config->module_names[j] == filename_str)
 625                 {
 626                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 627                         {
 628                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 629                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 630                                 return false;
 631                         }
 632                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 633                         if (intercount.first > 0)
 634                         {
 635                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 636                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 637                                                 intercount.first,
 638                                                 intercount.first > 1 ? "s" : "",
 639                                                 intercount.first > 1 ? "are" : "is",
 640                                                 intercount.second.c_str());
 641                                 return false;
 642                         }
 643                         /* Give the module a chance to tidy out all its metadata */
 644                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 645                         {
 646                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 647                         }
 648                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 649                         {
 650                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 651                         }
 652
 653                         /* Tidy up any dangling resolvers */
 654                         this->Res->CleanResolvers(modules[j]);
 655
 656                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 657
 658                         for(int t = 0; t < 255; t++)
 659                         {
 660                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 661                         }
 662
 663                         /* We have to renumber implement_lists after unload because the module numbers change!
 664                          */
 665                         for(int j2 = j; j2 < 254; j2++)
 666                         {
 667                                 for(int t = 0; t < 255; t++)
 668                                 {
 669                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 670                                 }
 671                         }
 672
 673                         // found the module
 674                         Parser->RemoveCommands(filename);
 675                         this->EraseModule(j);
 676                         this->EraseFactory(j);
 677                         this->Log(DEFAULT,"Module %s unloaded",filename);
 678                         this->ModCount--;
 679                         BuildISupport();
 680                         return true;
 681                 }
 682         }
 683         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 684         snprintf(MODERR,MAXBUF,"Module not loaded");
 685         return false;
 686 }
 687
 688 bool InspIRCd::LoadModule(const char* filename)
 689 {
 690         /* Do we have a glob pattern in the filename?
 691          * The user wants to load multiple modules which
 692          * match the pattern.
 693          */
 694         if (strchr(filename,'*') || (strchr(filename,'?')))
 695         {
 696                 int n_match = 0;
 697                 DIR* library = opendir(Config->ModPath);
 698                 if (library)
 699                 {
 700                         /* Try and locate and load all modules matching the pattern */
 701                         dirent* entry = NULL;
 702                         while ((entry = readdir(library)))
 703                         {
 704                                 if (this->MatchText(entry->d_name, filename))
 705                                 {
 706                                         if (!this->LoadModule(entry->d_name))
 707                                                 n_match++;
 708                                 }
 709                         }
 710                         closedir(library);
 711                 }
 712                 /* Loadmodule will now return false if any one of the modules failed
 713                  * to load (but wont abort when it encounters a bad one) and when 1 or
 714                  * more modules were actually loaded.
 715                  */
 716                 return (n_match > 0);
 717         }
 718
 719         char modfile[MAXBUF];
 720         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 721         std::string filename_str = filename;
 722
 723         if (!ServerConfig::DirValid(modfile))
 724         {
 725                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 726                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 727                 return false;
 728         }
 729         if (ServerConfig::FileExists(modfile))
 730         {
 731
 732                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 733                 {
 734                         if (Config->module_names[j] == filename_str)
 735                         {
 736                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 737                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 738                                 return false;
 739                         }
 740                 }
 741                 try
 742                 {
 743                         ircd_module* a = new ircd_module(this, modfile);
 744                         factory[this->ModCount+1] = a;
 745                         if (factory[this->ModCount+1]->LastError())
 746                         {
 747                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 748                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 749                                 return false;
 750                         }
 751                         if ((long)factory[this->ModCount+1]->factory != -1)
 752                         {
 753                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 754
 755                                 Version v = m->GetVersion();
 756
 757                                 if (v.API != API_VERSION)
 758                                 {
 759                                         delete m;
 760                                         delete a;
 761                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 762                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 763                                         return false;
 764                                 }
 765                                 else
 766                                 {
 767                                         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]"));
 768                                 }
 769
 770                                 modules[this->ModCount+1] = m;
 771                                 /* save the module and the module's classfactory, if
 772                                  * this isnt done, random crashes can occur :/ */
 773                                 Config->module_names.push_back(filename);
 774
 775                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 776                                 for(int t = 0; t < 255; t++)
 777                                         x[t] = 0;
 778
 779                                 modules[this->ModCount+1]->Implements(x);
 780
 781                                 for(int t = 0; t < 255; t++)
 782                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 783                         }
 784                         else
 785                         {
 786                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 787                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 788                                 return false;
 789                         }
 790                 }
 791                 catch (CoreException& modexcept)
 792                 {
 793                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 794                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 795                         return false;
 796                 }
 797         }
 798         else
 799         {
 800                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 801                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 802                 return false;
 803         }
 804         this->ModCount++;
 805         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 806         // now work out which modules, if any, want to move to the back of the queue,
 807         // and if they do, move them there.
 808         std::vector<std::string> put_to_back;
 809         std::vector<std::string> put_to_front;
 810         std::map<std::string,std::string> put_before;
 811         std::map<std::string,std::string> put_after;
 812         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 813         {
 814                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 815                         put_to_back.push_back(Config->module_names[j]);
 816                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 817                         put_to_front.push_back(Config->module_names[j]);
 818                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 819                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 820                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 821                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 822         }
 823         for (unsigned int j = 0; j < put_to_back.size(); j++)
 824                 MoveToLast(put_to_back[j]);
 825         for (unsigned int j = 0; j < put_to_front.size(); j++)
 826                 MoveToFirst(put_to_front[j]);
 827         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 828                 MoveBefore(j->first,j->second);
 829         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 830                 MoveAfter(j->first,j->second);
 831         BuildISupport();
 832         return true;
 833 }
 834
 835 void InspIRCd::DoOneIteration(bool process_module_sockets)
 836 {
 837         static rusage ru;
 838
 839         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 840          * Once per loop iteration is pleanty.
 841          */
 842         OLDTIME = TIME;
 843         TIME = time(NULL);
 844
 845         /* Run background module timers every few seconds
 846          * (the docs say modules shouldnt rely on accurate
 847          * timing using this event, so we dont have to
 848          * time this exactly).
 849          */
 850         if (TIME != OLDTIME)
 851         {
 852                 if (TIME < OLDTIME)
 853                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 854                 if ((TIME % 3600) == 0)
 855                 {
 856                         this->RehashUsersAndChans();
 857                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
 858                 }
 859                 Timers->TickTimers(TIME);
 860                 this->DoBackgroundUserStuff(TIME);
 861
 862                 if ((TIME % 5) == 0)
 863                 {
 864                         XLines->expire_lines();
 865                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 866                         Timers->TickMissedTimers(TIME);
 867                 }
 868
 869                 if (!getrusage(0, &ru))
 870                 {
 871                         gettimeofday(&this->stats->LastSampled, NULL);
 872                         this->stats->LastCPU = ru.ru_utime;
 873                 }
 874         }
 875
 876         /* Call the socket engine to wait on the active
 877          * file descriptors. The socket engine has everything's
 878          * descriptors in its list... dns, modules, users,
 879          * servers... so its nice and easy, just one call.
 880          * This will cause any read or write events to be
 881          * dispatched to their handlers.
 882          */
 883         SE->DispatchEvents();
 884
 885         /* if any users was quit, take them out */
 886         GlobalCulls.Apply();
 887
 888 }
 889
 890 bool InspIRCd::IsIdent(const char* n)
 891 {
 892         if (!n || !*n)
 893                 return false;
 894
 895         for (char* i = (char*)n; *i; i++)
 896         {
 897                 if ((*i >= 'A') && (*i <= '}'))
 898                 {
 899                         continue;
 900                 }
 901                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 902                 {
 903                         continue;
 904                 }
 905                 return false;
 906         }
 907         return true;
 908 }
 909
 910
 911 int InspIRCd::Run()
 912 {
 913         while (true)
 914         {
 915                 DoOneIteration(true);
 916         }
 917         /* This is never reached -- we hope! */
 918         return 0;
 919 }
 920
 921 /**********************************************************************************/
 922
 923 /**
 924  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 925  */
 926
 927 int main(int argc, char** argv)
 928 {
 929         SI = new InspIRCd(argc, argv);
 930         SI->Run();
 931         delete SI;
 932         return 0;
 933 }
 934
 935 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 936  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 937  * registration timeout maximum seconds)
 938  */
 939 bool InspIRCd::AllModulesReportReady(userrec* user)
 940 {
 941         if (!Config->global_implementation[I_OnCheckReady])
 942                 return true;
 943
 944         for (int i = 0; i <= this->GetModuleCount(); i++)
 945         {
 946                 if (Config->implement_lists[i][I_OnCheckReady])
 947                 {
 948                         int res = modules[i]->OnCheckReady(user);
 949                         if (!res)
 950                                 return false;
 951                 }
 952         }
 953         return true;
 954 }
 955
 956 int InspIRCd::GetModuleCount()
 957 {
 958         return this->ModCount;
 959 }
 960
 961 time_t InspIRCd::Time(bool delta)
 962 {
 963         if (delta)
 964                 return TIME + time_delta;
 965         return TIME;
 966 }
 967
 968 int InspIRCd::SetTimeDelta(int delta)
 969 {
 970         int old = time_delta;
 971         time_delta = delta;
 972         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 973         return old;
 974 }
 975
 976 void InspIRCd::AddLocalClone(userrec* user)
 977 {
 978         clonemap::iterator x = local_clones.find(user->GetIPString());
 979         if (x != local_clones.end())
 980                 x->second++;
 981         else
 982                 local_clones[user->GetIPString()] = 1;
 983 }
 984
 985 void InspIRCd::AddGlobalClone(userrec* user)
 986 {
 987         clonemap::iterator y = global_clones.find(user->GetIPString());
 988         if (y != global_clones.end())
 989                 y->second++;
 990         else
 991                 global_clones[user->GetIPString()] = 1;
 992 }
 993
 994 int InspIRCd::GetTimeDelta()
 995 {
 996         return time_delta;
 997 }
 998
 999 bool FileLogger::Readable()
1000 {
1001         return false;
1002 }
1003
1004 void FileLogger::HandleEvent(EventType et, int errornum)
1005 {
1006         this->WriteLogLine("");
1007         if (log)
1008                 ServerInstance->SE->DelFd(this);
1009 }
1010
1011 void FileLogger::WriteLogLine(const std::string &line)
1012 {
1013         if (line.length())
1014                 buffer.append(line);
1015
1016         if (log)
1017         {
1018                 int written = fprintf(log,"%s",buffer.c_str());
1019                 if ((written >= 0) && (written < (int)buffer.length()))
1020                 {
1021                         buffer.erase(0, buffer.length());
1022                         ServerInstance->SE->AddFd(this);
1023                 }
1024                 else if (written == -1)
1025                 {
1026                         if (errno == EAGAIN)
1027                                 ServerInstance->SE->AddFd(this);
1028                 }
1029                 else
1030                 {
1031                         /* Wrote the whole buffer, and no need for write callback */
1032                         buffer = "";
1033                 }
1034
1035                 if (writeops++ % 20)
1036                 {
1037                         fflush(log);
1038                 }
1039         }
1040 }
1041
1042 void FileLogger::Close()
1043 {
1044         if (log)
1045         {
1046                 int flags = fcntl(fileno(log), F_GETFL, 0);
1047                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
1048                 if (buffer.size())
1049                         fprintf(log,"%s",buffer.c_str());
1050
1051                 ServerInstance->SE->DelFd(this);
1052
1053                 fflush(log);
1054                 fclose(log);
1055         }
1056
1057         buffer = "";
1058 }
1059
1060 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
1061 {
1062         if (log)
1063         {
1064                 irc::sockets::NonBlocking(fileno(log));
1065                 this->SetFd(fileno(log));
1066                 buffer = "";
1067         }
1068 }
1069
1070 FileLogger::~FileLogger()
1071 {
1072         this->Close();
1073 }
1074