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 "modules.h"
  21 #include "mode.h"
  22 #include "xline.h"
  23 #include "socketengine.h"
  24 #include "inspircd_se_config.h"
  25 #include "socket.h"
  26 #include "typedefs.h"
  27 #include "command_parse.h"
  28 #include "exitcodes.h"
  29 #include <dlfcn.h>
  30
  31 using irc::sockets::NonBlocking;
  32 using irc::sockets::Blocking;
  33 using irc::sockets::insp_ntoa;
  34 using irc::sockets::insp_inaddr;
  35 using irc::sockets::insp_sockaddr;
  36
  37 InspIRCd* SI = NULL;
  38
  39 void InspIRCd::AddServerName(const std::string &servername)
  40 {
  41         this->Log(DEBUG,"Adding server name: %s",servername.c_str());
  42
  43         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  44                 servernames.push_back(servername); /* Wasn't already there. */
  45 }
  46
  47 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  48 {
  49         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  50
  51         if(iter == servernames.end())
  52         {
  53                 AddServerName(servername);
  54                 iter = --servernames.end();
  55         }
  56
  57         return iter->c_str();
  58 }
  59
  60 bool InspIRCd::FindServerName(const std::string &servername)
  61 {
  62         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
  63 }
  64
  65 void InspIRCd::Exit(int status)
  66 {
  67         if (SI)
  68         {
  69                 SI->SendError("Exiting with status " + ConvToStr(status) + " (" + std::string(ExitCodes[status]) + ")");
  70                 SI->Cleanup();
  71         }
  72         exit (status);
  73 }
  74
  75 void InspIRCd::Cleanup()
  76 {
  77         std::vector<std::string> mymodnames;
  78         int MyModCount = this->GetModuleCount();
  79
  80         for (unsigned int i = 0; i < stats->BoundPortCount; i++)
  81                 /* This calls the constructor and closes the listening socket */
  82                 delete Config->openSockfd[i];
  83
  84         /* We do this more than once, so that any service providers get a
  85          * chance to be unhooked by the modules using them, but then get
  86          * a chance to be removed themsleves.
  87          */
  88         for (int tries = 0; tries < 3; tries++)
  89         {
  90                 MyModCount = this->GetModuleCount();
  91                 mymodnames.clear();
  92
  93                 /* Unload all modules, so they get a chance to clean up their listeners */
  94                 for (int j = 0; j <= MyModCount; j++)
  95                         mymodnames.push_back(Config->module_names[j]);
  96
  97                 for (int k = 0; k <= MyModCount; k++)
  98                         this->UnloadModule(mymodnames[k].c_str());
  99         }
 100
 101         /* Close all client sockets, or the new process inherits them */
 102         for (std::vector<userrec*>::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
 103                 (*i)->CloseSocket();
 104
 105         /* Close logging */
 106         this->Logger->Close();
 107 }
 108
 109 void InspIRCd::Restart(const std::string &reason)
 110 {
 111         /* SendError flushes each client's queue,
 112          * regardless of writeability state
 113          */
 114         this->SendError(reason);
 115
 116         this->Cleanup();
 117
 118         /* Figure out our filename (if theyve renamed it, we're boned) */
 119         std::string me = Config->MyDir + "/inspircd";
 120
 121         if (execv(me.c_str(), Config->argv) == -1)
 122         {
 123                 /* Will raise a SIGABRT if not trapped */
 124                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 125         }
 126 }
 127
 128 void InspIRCd::Start()
 129 {
 130         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 131         printf("(C) InspIRCd Development Team.\033[0m\n\n");
 132         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey\033[0m\n");
 133         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 134 }
 135
 136 void InspIRCd::Rehash(int status)
 137 {
 138         SI->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
 139         SI->CloseLog();
 140         SI->OpenLog(NULL,0);
 141         SI->Config->Read(false,NULL);
 142         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(""));
 143 }
 144
 145 void InspIRCd::CloseLog()
 146 {
 147         this->Logger->Close();
 148 }
 149
 150 void InspIRCd::SetSignals()
 151 {
 152         signal(SIGALRM, SIG_IGN);
 153         signal(SIGHUP, InspIRCd::Rehash);
 154         signal(SIGPIPE, SIG_IGN);
 155         signal(SIGTERM, InspIRCd::Exit);
 156         signal(SIGCHLD, SIG_IGN);
 157 }
 158
 159 bool InspIRCd::DaemonSeed()
 160 {
 161         int childpid;
 162         if ((childpid = fork ()) < 0)
 163                 return false;
 164         else if (childpid > 0)
 165         {
 166                 /* We wait here for the child process to kill us,
 167                  * so that the shell prompt doesnt come back over
 168                  * the output.
 169                  * Sending a kill with a signal of 0 just checks
 170                  * if the child pid is still around. If theyre not,
 171                  * they threw an error and we should give up.
 172                  */
 173                 while (kill(childpid, 0) != -1)
 174                         sleep(1);
 175                 exit(0);
 176         }
 177         setsid ();
 178         umask (007);
 179         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 180
 181         rlimit rl;
 182         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 183         {
 184                 this->Log(DEFAULT,"Failed to getrlimit()!");
 185                 return false;
 186         }
 187         else
 188         {
 189                 rl.rlim_cur = rl.rlim_max;
 190                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 191                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 192         }
 193
 194         return true;
 195 }
 196
 197 void InspIRCd::WritePID(const std::string &filename)
 198 {
 199         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 200         if (*(fname.begin()) != '/')
 201         {
 202                 std::string::size_type pos;
 203                 std::string confpath = CONFIG_FILE;
 204                 if ((pos = confpath.find("/inspircd.conf")) != std::string::npos)
 205                 {
 206                         /* Leaves us with just the path */
 207                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 208                 }
 209         }
 210         std::ofstream outfile(fname.c_str());
 211         if (outfile.is_open())
 212         {
 213                 outfile << getpid();
 214                 outfile.close();
 215         }
 216         else
 217         {
 218                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 219                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 220                 Exit(EXIT_STATUS_PID);
 221         }
 222 }
 223
 224 std::string InspIRCd::GetRevision()
 225 {
 226         return REVISION;
 227 }
 228
 229 InspIRCd::InspIRCd(int argc, char** argv)
 230         : 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)
 231 {
 232         int found_ports = 0;
 233         FailedPortList pl;
 234
 235         modules.resize(255);
 236         factory.resize(255);
 237
 238         this->Config = new ServerConfig(this);
 239         this->Config->opertypes.clear();
 240         this->Config->operclass.clear();
 241         this->SNO = new SnomaskManager(this);
 242         this->Start();
 243         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 244         this->time_delta = 0;
 245         this->next_call = this->TIME + 3;
 246         srand(this->TIME);
 247         this->Log(DEBUG,"*** InspIRCd starting up!");
 248         if (!ServerConfig::FileExists(CONFIG_FILE))
 249         {
 250                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 251                 this->Log(DEFAULT,"main: no config");
 252                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 253                 Exit(EXIT_STATUS_CONFIG);
 254         }
 255         *this->LogFileName = 0;
 256         if (argc > 1) {
 257                 for (int i = 1; i < argc; i++)
 258                 {
 259                         if (!strcmp(argv[i],"-nofork"))
 260                         {
 261                                 Config->nofork = true;
 262                         }
 263                         else if(!strcmp(argv[i],"-debug"))
 264                         {
 265                                 Config->forcedebug = true;
 266                         }
 267                         else if(!strcmp(argv[i],"-nolog"))
 268                         {
 269                                 Config->writelog = false;
 270                         }
 271                         else if (!strcmp(argv[i],"-wait"))
 272                         {
 273                                 sleep(6);
 274                         }
 275                         else if (!strcmp(argv[i],"-logfile"))
 276                         {
 277                                 if (argc > i+1)
 278                                 {
 279                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 280                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 281                                 }
 282                                 else
 283                                 {
 284                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 285                                         Exit(EXIT_STATUS_CONFIG);
 286                                 }
 287                                 i++;
 288                         }
 289                         else
 290                         {
 291                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-logfile <filename>]\n",argv[0]);
 292                                 Exit(EXIT_STATUS_ARGV);
 293                         }
 294                 }
 295         }
 296
 297         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 298
 299         this->OpenLog(argv, argc);
 300         this->stats = new serverstats();
 301         this->Parser = new CommandParser(this);
 302         this->Timers = new TimerManager();
 303         this->XLines = new XLineManager(this);
 304         Config->ClearStack();
 305         Config->Read(true, NULL);
 306         this->CheckRoot();
 307         this->Modes = new ModeParser(this);
 308         this->AddServerName(Config->ServerName);
 309         CheckDie();
 310         InitializeDisabledCommands(Config->DisabledCommands, this);
 311         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 312
 313         for(int t = 0; t < 255; t++)
 314                 Config->global_implementation[t] = 0;
 315
 316         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 317
 318         printf("\n");
 319         this->SetSignals();
 320         if (!Config->nofork)
 321         {
 322                 if (!this->DaemonSeed())
 323                 {
 324                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 325                         Exit(EXIT_STATUS_FORK);
 326                 }
 327         }
 328
 329         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 330          * initialize the socket engine.
 331          */
 332         SocketEngineFactory* SEF = new SocketEngineFactory();
 333         SE = SEF->Create(this);
 334         delete SEF;
 335
 336         this->Res = new DNS(this);
 337
 338         this->LoadAllModules();
 339         /* Just in case no modules were loaded - fix for bug #101 */
 340         this->BuildISupport();
 341
 342         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 343         {
 344                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 345                 Exit(EXIT_STATUS_BIND);
 346         }
 347
 348         if (stats->BoundPortCount != (unsigned int)found_ports)
 349         {
 350                 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);
 351                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 352                 int j = 1;
 353                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 354                 {
 355                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 356                 }
 357         }
 358
 359         /* Add the listening sockets used for client inbound connections
 360          * to the socket engine
 361          */
 362         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 363         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 364         {
 365                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]->GetFd());
 366                 if (!SE->AddFd(Config->openSockfd[count]))
 367                 {
 368                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 369                         Exit(EXIT_STATUS_INTERNAL);
 370                 }
 371         }
 372
 373         if (!Config->nofork)
 374         {
 375                 if (kill(getppid(), SIGTERM) == -1)
 376                         printf("Error killing parent process: %s\n",strerror(errno));
 377                 fclose(stdin);
 378                 fclose(stderr);
 379                 fclose(stdout);
 380         }
 381
 382         printf("\nInspIRCd is now running!\n");
 383
 384         this->WritePID(Config->PID);
 385 }
 386
 387 std::string InspIRCd::GetVersionString()
 388 {
 389         char versiondata[MAXBUF];
 390         char dnsengine[] = "singlethread-object";
 391         if (*Config->CustomVersion)
 392         {
 393                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 394         }
 395         else
 396         {
 397                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 398         }
 399         return versiondata;
 400 }
 401
 402 char* InspIRCd::ModuleError()
 403 {
 404         return MODERR;
 405 }
 406
 407 void InspIRCd::EraseFactory(int j)
 408 {
 409         int v = 0;
 410         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 411         {
 412                 if (v == j)
 413                 {
 414                         delete *t;
 415                         factory.erase(t);
 416                         factory.push_back(NULL);
 417                         return;
 418                 }
 419                 v++;
 420         }
 421 }
 422
 423 void InspIRCd::EraseModule(int j)
 424 {
 425         int v1 = 0;
 426         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 427         {
 428                 if (v1 == j)
 429                 {
 430                         DELETE(*m);
 431                         modules.erase(m);
 432                         modules.push_back(NULL);
 433                         break;
 434                 }
 435                 v1++;
 436         }
 437         int v2 = 0;
 438         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 439         {
 440                 if (v2 == j)
 441                 {
 442                        Config->module_names.erase(v);
 443                        break;
 444                 }
 445                 v2++;
 446         }
 447
 448 }
 449
 450 void InspIRCd::MoveTo(std::string modulename,int slot)
 451 {
 452         unsigned int v2 = 256;
 453         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 454         {
 455                 if (Config->module_names[v] == modulename)
 456                 {
 457                         // found an instance, swap it with the item at the end
 458                         v2 = v;
 459                         break;
 460                 }
 461         }
 462         if ((v2 != (unsigned int)slot) && (v2 < 256))
 463         {
 464                 // Swap the module names over
 465                 Config->module_names[v2] = Config->module_names[slot];
 466                 Config->module_names[slot] = modulename;
 467                 // now swap the module factories
 468                 ircd_module* temp = factory[v2];
 469                 factory[v2] = factory[slot];
 470                 factory[slot] = temp;
 471                 // now swap the module objects
 472                 Module* temp_module = modules[v2];
 473                 modules[v2] = modules[slot];
 474                 modules[slot] = temp_module;
 475                 // now swap the implement lists (we dont
 476                 // need to swap the global or recount it)
 477                 for (int n = 0; n < 255; n++)
 478                 {
 479                         char x = Config->implement_lists[v2][n];
 480                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 481                         Config->implement_lists[slot][n] = x;
 482                 }
 483         }
 484         else
 485         {
 486                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 487         }
 488 }
 489
 490 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 491 {
 492         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 493         {
 494                 if (Config->module_names[v] == after)
 495                 {
 496                         MoveTo(modulename, v);
 497                         return;
 498                 }
 499         }
 500 }
 501
 502 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 503 {
 504         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 505         {
 506                 if (Config->module_names[v] == before)
 507                 {
 508                         if (v > 0)
 509                         {
 510                                 MoveTo(modulename, v-1);
 511                         }
 512                         else
 513                         {
 514                                 MoveTo(modulename, v);
 515                         }
 516                         return;
 517                 }
 518         }
 519 }
 520
 521 void InspIRCd::MoveToFirst(std::string modulename)
 522 {
 523         MoveTo(modulename,0);
 524 }
 525
 526 void InspIRCd::MoveToLast(std::string modulename)
 527 {
 528         MoveTo(modulename,this->GetModuleCount());
 529 }
 530
 531 void InspIRCd::BuildISupport()
 532 {
 533         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 534         std::stringstream v;
 535         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 536         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 537         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 538         Config->data005 = v.str();
 539         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 540         Config->Update005();
 541 }
 542
 543 bool InspIRCd::UnloadModule(const char* filename)
 544 {
 545         std::string filename_str = filename;
 546         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 547         {
 548                 if (Config->module_names[j] == filename_str)
 549                 {
 550                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 551                         {
 552                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 553                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 554                                 return false;
 555                         }
 556                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 557                         if (intercount.first > 0)
 558                         {
 559                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 560                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 561                                                 intercount.first,
 562                                                 intercount.first > 1 ? "s" : "",
 563                                                 intercount.first > 1 ? "are" : "is",
 564                                                 intercount.second.c_str());
 565                                 return false;
 566                         }
 567                         /* Give the module a chance to tidy out all its metadata */
 568                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 569                         {
 570                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 571                         }
 572                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 573                         {
 574                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 575                         }
 576
 577                         /* Tidy up any dangling resolvers */
 578                         this->Res->CleanResolvers(modules[j]);
 579
 580                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 581
 582                         for(int t = 0; t < 255; t++)
 583                         {
 584                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 585                         }
 586
 587                         /* We have to renumber implement_lists after unload because the module numbers change!
 588                          */
 589                         for(int j2 = j; j2 < 254; j2++)
 590                         {
 591                                 for(int t = 0; t < 255; t++)
 592                                 {
 593                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 594                                 }
 595                         }
 596
 597                         // found the module
 598                         Parser->RemoveCommands(filename);
 599                         this->EraseModule(j);
 600                         this->EraseFactory(j);
 601                         this->Log(DEFAULT,"Module %s unloaded",filename);
 602                         this->ModCount--;
 603                         BuildISupport();
 604                         return true;
 605                 }
 606         }
 607         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 608         snprintf(MODERR,MAXBUF,"Module not loaded");
 609         return false;
 610 }
 611
 612 bool InspIRCd::LoadModule(const char* filename)
 613 {
 614         /* Do we have a glob pattern in the filename?
 615          * The user wants to load multiple modules which
 616          * match the pattern.
 617          */
 618         if (strchr(filename,'*') || (strchr(filename,'?')))
 619         {
 620                 int n_match = 0;
 621                 DIR* library = opendir(Config->ModPath);
 622                 if (library)
 623                 {
 624                         /* Try and locate and load all modules matching the pattern */
 625                         dirent* entry = NULL;
 626                         while ((entry = readdir(library)))
 627                         {
 628                                 if (this->MatchText(entry->d_name, filename))
 629                                 {
 630                                         if (!this->LoadModule(entry->d_name))
 631                                                 n_match++;
 632                                 }
 633                         }
 634                         closedir(library);
 635                 }
 636                 /* Loadmodule will now return false if any one of the modules failed
 637                  * to load (but wont abort when it encounters a bad one) and when 1 or
 638                  * more modules were actually loaded.
 639                  */
 640                 return (n_match > 0);
 641         }
 642
 643         char modfile[MAXBUF];
 644         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 645         std::string filename_str = filename;
 646
 647         if (!ServerConfig::DirValid(modfile))
 648         {
 649                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 650                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 651                 return false;
 652         }
 653         this->Log(DEBUG,"Loading module: %s",modfile);
 654
 655         if (ServerConfig::FileExists(modfile))
 656         {
 657
 658                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 659                 {
 660                         if (Config->module_names[j] == filename_str)
 661                         {
 662                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 663                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 664                                 return false;
 665                         }
 666                 }
 667                 try
 668                 {
 669                         ircd_module* a = new ircd_module(this, modfile);
 670                         factory[this->ModCount+1] = a;
 671                         if (factory[this->ModCount+1]->LastError())
 672                         {
 673                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 674                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 675                                 return false;
 676                         }
 677                         if ((long)factory[this->ModCount+1]->factory != -1)
 678                         {
 679                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 680
 681                                 Version v = m->GetVersion();
 682
 683                                 if (v.API != API_VERSION)
 684                                 {
 685                                         delete m;
 686                                         delete a;
 687                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 688                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 689                                         return false;
 690                                 }
 691                                 else
 692                                 {
 693                                         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]"));
 694                                 }
 695
 696                                 modules[this->ModCount+1] = m;
 697                                 /* save the module and the module's classfactory, if
 698                                  * this isnt done, random crashes can occur :/ */
 699                                 Config->module_names.push_back(filename);
 700
 701                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 702                                 for(int t = 0; t < 255; t++)
 703                                         x[t] = 0;
 704
 705                                 modules[this->ModCount+1]->Implements(x);
 706
 707                                 for(int t = 0; t < 255; t++)
 708                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 709                         }
 710                         else
 711                         {
 712                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 713                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 714                                 return false;
 715                         }
 716                 }
 717                 catch (CoreException& modexcept)
 718                 {
 719                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 720                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 721                         return false;
 722                 }
 723         }
 724         else
 725         {
 726                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 727                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 728                 return false;
 729         }
 730         this->ModCount++;
 731         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 732         // now work out which modules, if any, want to move to the back of the queue,
 733         // and if they do, move them there.
 734         std::vector<std::string> put_to_back;
 735         std::vector<std::string> put_to_front;
 736         std::map<std::string,std::string> put_before;
 737         std::map<std::string,std::string> put_after;
 738         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 739         {
 740                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 741                         put_to_back.push_back(Config->module_names[j]);
 742                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 743                         put_to_front.push_back(Config->module_names[j]);
 744                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 745                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 746                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 747                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 748         }
 749         for (unsigned int j = 0; j < put_to_back.size(); j++)
 750                 MoveToLast(put_to_back[j]);
 751         for (unsigned int j = 0; j < put_to_front.size(); j++)
 752                 MoveToFirst(put_to_front[j]);
 753         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 754                 MoveBefore(j->first,j->second);
 755         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 756                 MoveAfter(j->first,j->second);
 757         BuildISupport();
 758         return true;
 759 }
 760
 761 void InspIRCd::DoOneIteration(bool process_module_sockets)
 762 {
 763         static rusage ru;
 764
 765         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 766          * Once per loop iteration is pleanty.
 767          */
 768         OLDTIME = TIME;
 769         TIME = time(NULL);
 770
 771         /* Run background module timers every few seconds
 772          * (the docs say modules shouldnt rely on accurate
 773          * timing using this event, so we dont have to
 774          * time this exactly).
 775          */
 776         if (TIME != OLDTIME)
 777         {
 778                 if (TIME < OLDTIME)
 779                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 780                 if ((TIME % 3600) == 0)
 781                 {
 782                         irc::whowas::MaintainWhoWas(this, TIME);
 783                 }
 784                 Timers->TickTimers(TIME);
 785                 this->DoBackgroundUserStuff(TIME);
 786
 787                 if ((TIME % 5) == 0)
 788                 {
 789                         XLines->expire_lines();
 790                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 791                         Timers->TickMissedTimers(TIME);
 792                 }
 793
 794                 if (!getrusage(0, &ru))
 795                 {
 796                         gettimeofday(&this->stats->LastSampled, NULL);
 797                         this->stats->LastCPU = ru.ru_utime;
 798                 }
 799         }
 800
 801         /* Call the socket engine to wait on the active
 802          * file descriptors. The socket engine has everything's
 803          * descriptors in its list... dns, modules, users,
 804          * servers... so its nice and easy, just one call.
 805          * This will cause any read or write events to be
 806          * dispatched to their handlers.
 807          */
 808         SE->DispatchEvents();
 809 }
 810
 811 bool InspIRCd::IsIdent(const char* n)
 812 {
 813         if (!n || !*n)
 814                 return false;
 815
 816         for (char* i = (char*)n; *i; i++)
 817         {
 818                 if ((*i >= 'A') && (*i <= '}'))
 819                 {
 820                         continue;
 821                 }
 822                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 823                 {
 824                         continue;
 825                 }
 826                 return false;
 827         }
 828         return true;
 829 }
 830
 831
 832 int InspIRCd::Run()
 833 {
 834         while (true)
 835         {
 836                 DoOneIteration(true);
 837         }
 838         /* This is never reached -- we hope! */
 839         return 0;
 840 }
 841
 842 /**********************************************************************************/
 843
 844 /**
 845  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 846  */
 847
 848 int main(int argc, char** argv)
 849 {
 850         SI = new InspIRCd(argc, argv);
 851         SI->Run();
 852         delete SI;
 853         return 0;
 854 }
 855
 856 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 857  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 858  * registration timeout maximum seconds)
 859  */
 860 bool InspIRCd::AllModulesReportReady(userrec* user)
 861 {
 862         if (!Config->global_implementation[I_OnCheckReady])
 863                 return true;
 864
 865         for (int i = 0; i <= this->GetModuleCount(); i++)
 866         {
 867                 if (Config->implement_lists[i][I_OnCheckReady])
 868                 {
 869                         int res = modules[i]->OnCheckReady(user);
 870                         if (!res)
 871                                 return false;
 872                 }
 873         }
 874         return true;
 875 }
 876
 877 int InspIRCd::GetModuleCount()
 878 {
 879         return this->ModCount;
 880 }
 881
 882 time_t InspIRCd::Time(bool delta)
 883 {
 884         if (delta)
 885                 return TIME + time_delta;
 886         return TIME;
 887 }
 888
 889 int InspIRCd::SetTimeDelta(int delta)
 890 {
 891         int old = time_delta;
 892         time_delta += delta;
 893         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 894         return old;
 895 }
 896
 897 void InspIRCd::AddLocalClone(userrec* user)
 898 {
 899         clonemap::iterator x = local_clones.find(user->GetIPString());
 900         if (x != local_clones.end())
 901                 x->second++;
 902         else
 903                 local_clones[user->GetIPString()] = 1;
 904 }
 905
 906 void InspIRCd::AddGlobalClone(userrec* user)
 907 {
 908         clonemap::iterator y = global_clones.find(user->GetIPString());
 909         if (y != global_clones.end())
 910                 y->second++;
 911         else
 912                 global_clones[user->GetIPString()] = 1;
 913 }
 914
 915 int InspIRCd::GetTimeDelta()
 916 {
 917         return time_delta;
 918 }
 919
 920 bool FileLogger::Readable()
 921 {
 922         return false;
 923 }
 924
 925 void FileLogger::HandleEvent(EventType et, int errornum)
 926 {
 927         this->WriteLogLine("");
 928         ServerInstance->SE->DelFd(this);
 929 }
 930
 931 void FileLogger::WriteLogLine(const std::string &line)
 932 {
 933         if (line.length())
 934                 buffer.append(line);
 935
 936         if (log)
 937         {
 938                 int written = fprintf(log,"%s",buffer.c_str());
 939                 if ((written >= 0) && (written < (int)buffer.length()))
 940                 {
 941                         buffer.erase(0, buffer.length());
 942                         ServerInstance->SE->AddFd(this);
 943                 }
 944                 else if (written == -1)
 945                 {
 946                         if (errno == EAGAIN)
 947                                 ServerInstance->SE->AddFd(this);
 948                 }
 949                 else
 950                 {
 951                         /* Wrote the whole buffer, and no need for write callback */
 952                         buffer = "";
 953                 }
 954         }
 955         if (writeops++ % 20)
 956         {
 957                 fflush(log);
 958         }
 959 }
 960
 961 void FileLogger::Close()
 962 {
 963         if (log)
 964         {
 965                 int flags = fcntl(fileno(log), F_GETFL, 0);
 966                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
 967                 if (buffer.size())
 968                         fprintf(log,"%s",buffer.c_str());
 969                 fflush(log);
 970                 fclose(log);
 971         }
 972         buffer = "";
 973         ServerInstance->SE->DelFd(this);
 974 }
 975
 976 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
 977 {
 978         irc::sockets::NonBlocking(fileno(log));
 979         this->SetFd(fileno(log));
 980         buffer = "";
 981 }
 982
 983 FileLogger::~FileLogger()
 984 {
 985         this->Close();
 986 }
 987