src/inspircd.cpp

   1 /* ---------------------------------------------------------------------
   2  *
   3  *            +------------------------------------+
   4  *            | Inspire Internet Relay Chat Daemon |
   5  *            +------------------------------------+
   6  *
   7  *       InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   8  *                           E-mail:
   9  *                    <brain@chatspike.net>
  10  *                    <Craig@chatspike.net>
  11  *
  12  *  Written by Craig Edwards, Craig McLure, and others.
  13  *  This program is free but copyrighted software; you can redistribute
  14  *  it and/or modify it under the terms of the GNU General Public
  15  *  License as published by the Free Software Foundation, version 2
  16  *  (two) ONLY.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  *
  27  * ---------------------------------------------------------------------
  28  */
  29
  30 #include "inspircd.h"
  31 #include "configreader.h"
  32 #include <signal.h>
  33 #include <dirent.h>
  34 #include <exception>
  35 #include <fstream>
  36 #include "modules.h"
  37 #include "mode.h"
  38 #include "xline.h"
  39 #include "socketengine.h"
  40 #include "inspircd_se_config.h"
  41 #include "socket.h"
  42 #include "typedefs.h"
  43 #include "command_parse.h"
  44 #include <dlfcn.h>
  45
  46 using irc::sockets::NonBlocking;
  47 using irc::sockets::Blocking;
  48 using irc::sockets::insp_ntoa;
  49 using irc::sockets::insp_inaddr;
  50 using irc::sockets::insp_sockaddr;
  51
  52 InspIRCd* SI = NULL;
  53
  54 void InspIRCd::AddServerName(const std::string &servername)
  55 {
  56         this->Log(DEBUG,"Adding server name: %s",servername.c_str());
  57
  58         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  59                 servernames.push_back(servername); /* Wasn't already there. */
  60 }
  61
  62 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  63 {
  64         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  65
  66         if(iter == servernames.end())
  67         {
  68                 AddServerName(servername);
  69                 iter = --servernames.end();
  70         }
  71
  72         return iter->c_str();
  73 }
  74
  75 bool InspIRCd::FindServerName(const std::string &servername)
  76 {
  77         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
  78 }
  79
  80 void InspIRCd::Exit(int status)
  81 {
  82         exit (status);
  83 }
  84
  85 void InspIRCd::Start()
  86 {
  87         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
  88         printf("(C) ChatSpike Development team.\033[0m\n\n");
  89         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey\033[0m\n");
  90         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
  91         printf("Name concept:\t\t\033[1;32mLord_Zathras\033[0m\n\n");
  92 }
  93
  94 void InspIRCd::Rehash(int status)
  95 {
  96         SI->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
  97         fclose(SI->Config->log_file);
  98         SI->OpenLog(NULL,0);
  99         SI->Config->Read(false,NULL);
 100         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(""));
 101 }
 102
 103 void InspIRCd::SetSignals()
 104 {
 105         signal(SIGALRM, SIG_IGN);
 106         signal(SIGHUP, InspIRCd::Rehash);
 107         signal(SIGPIPE, SIG_IGN);
 108         signal(SIGTERM, InspIRCd::Exit);
 109         signal(SIGCHLD, SIG_IGN);
 110 }
 111
 112 bool InspIRCd::DaemonSeed()
 113 {
 114         int childpid;
 115         if ((childpid = fork ()) < 0)
 116                 return false;
 117         else if (childpid > 0)
 118         {
 119                 /* We wait here for the child process to kill us,
 120                  * so that the shell prompt doesnt come back over
 121                  * the output.
 122                  * Sending a kill with a signal of 0 just checks
 123                  * if the child pid is still around. If theyre not,
 124                  * they threw an error and we should give up.
 125                  */
 126                 while (kill(childpid, 0) != -1)
 127                         sleep(1);
 128                 exit(ERROR);
 129         }
 130         setsid ();
 131         umask (007);
 132         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 133
 134         rlimit rl;
 135         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 136         {
 137                 this->Log(DEFAULT,"Failed to getrlimit()!");
 138                 return false;
 139         }
 140         else
 141         {
 142                 rl.rlim_cur = rl.rlim_max;
 143                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 144                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 145         }
 146
 147         return true;
 148 }
 149
 150 void InspIRCd::WritePID(const std::string &filename)
 151 {
 152         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 153         if (*(fname.begin()) != '/')
 154         {
 155                 std::string::size_type pos;
 156                 std::string confpath = CONFIG_FILE;
 157                 if ((pos = confpath.find("/inspircd.conf")) != std::string::npos)
 158                 {
 159                         /* Leaves us with just the path */
 160                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 161                 }
 162         }
 163         std::ofstream outfile(fname.c_str());
 164         if (outfile.is_open())
 165         {
 166                 outfile << getpid();
 167                 outfile.close();
 168         }
 169         else
 170         {
 171                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 172                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 173                 Exit(0);
 174         }
 175 }
 176
 177 std::string InspIRCd::GetRevision()
 178 {
 179         return REVISION;
 180 }
 181
 182 InspIRCd::InspIRCd(int argc, char** argv)
 183         : 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)
 184 {
 185         int found_ports = 0;
 186         FailedPortList pl;
 187
 188         modules.resize(255);
 189         factory.resize(255);
 190
 191         this->Config = new ServerConfig(this);
 192         this->Config->opertypes.clear();
 193         this->Config->operclass.clear();
 194         this->SNO = new SnomaskManager(this);
 195         this->Start();
 196         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 197         this->time_delta = 0;
 198         this->next_call = this->TIME + 3;
 199         srand(this->TIME);
 200         this->Log(DEBUG,"*** InspIRCd starting up!");
 201         if (!ServerConfig::FileExists(CONFIG_FILE))
 202         {
 203                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 204                 this->Log(DEFAULT,"main: no config");
 205                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 206                 Exit(ERROR);
 207         }
 208         *this->LogFileName = 0;
 209         if (argc > 1) {
 210                 for (int i = 1; i < argc; i++)
 211                 {
 212                         if (!strcmp(argv[i],"-nofork"))
 213                         {
 214                                 Config->nofork = true;
 215                         }
 216                         else if(!strcmp(argv[i],"-debug"))
 217                         {
 218                                 Config->forcedebug = true;
 219                         }
 220                         else if(!strcmp(argv[i],"-nolog"))
 221                         {
 222                                 Config->writelog = false;
 223                         }
 224                         else if (!strcmp(argv[i],"-wait"))
 225                         {
 226                                 sleep(6);
 227                         }
 228                         else if (!strcmp(argv[i],"-logfile"))
 229                         {
 230                                 if (argc > i+1)
 231                                 {
 232                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 233                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 234                                 }
 235                                 else
 236                                 {
 237                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 238                                         Exit(ERROR);
 239                                 }
 240                                 i++;
 241                         }
 242                         else
 243                         {
 244                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-logfile <filename>]\n",argv[0]);
 245                                 Exit(ERROR);
 246                         }
 247                 }
 248         }
 249
 250         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 251
 252         this->OpenLog(argv, argc);
 253         this->stats = new serverstats();
 254         this->Parser = new CommandParser(this);
 255         this->Timers = new TimerManager();
 256         this->XLines = new XLineManager(this);
 257         Config->ClearStack();
 258         Config->Read(true, NULL);
 259         this->CheckRoot();
 260         this->Modes = new ModeParser(this);
 261         this->AddServerName(Config->ServerName);
 262         CheckDie();
 263         InitializeDisabledCommands(Config->DisabledCommands, this);
 264         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 265
 266         for(int t = 0; t < 255; t++)
 267                 Config->global_implementation[t] = 0;
 268
 269         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 270
 271         printf("\n");
 272         this->SetSignals();
 273         if (!Config->nofork)
 274         {
 275                 if (!this->DaemonSeed())
 276                 {
 277                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 278                         Exit(ERROR);
 279                 }
 280         }
 281
 282         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 283          * initialize the socket engine.
 284          */
 285         SocketEngineFactory* SEF = new SocketEngineFactory();
 286         SE = SEF->Create(this);
 287         delete SEF;
 288
 289         this->Res = new DNS(this);
 290
 291         this->LoadAllModules();
 292         /* Just in case no modules were loaded - fix for bug #101 */
 293         this->BuildISupport();
 294
 295         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 296         {
 297                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 298                 Exit(ERROR);
 299         }
 300
 301         if (stats->BoundPortCount != (unsigned int)found_ports)
 302         {
 303                 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);
 304                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 305                 int j = 1;
 306                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 307                 {
 308                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 309                 }
 310         }
 311
 312         /* Add the listening sockets used for client inbound connections
 313          * to the socket engine
 314          */
 315         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 316         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 317         {
 318                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]->GetFd());
 319                 if (!SE->AddFd(Config->openSockfd[count]))
 320                 {
 321                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 322                         Exit(ERROR);
 323                 }
 324         }
 325
 326         if (!Config->nofork)
 327         {
 328                 if (kill(getppid(), SIGTERM) == -1)
 329                         printf("Error killing parent process: %s\n",strerror(errno));
 330                 fclose(stdin);
 331                 fclose(stderr);
 332                 fclose(stdout);
 333         }
 334
 335         printf("\nInspIRCd is now running!\n");
 336
 337         this->WritePID(Config->PID);
 338 }
 339
 340 std::string InspIRCd::GetVersionString()
 341 {
 342         char versiondata[MAXBUF];
 343         char dnsengine[] = "singlethread-object";
 344         if (*Config->CustomVersion)
 345         {
 346                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 347         }
 348         else
 349         {
 350                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 351         }
 352         return versiondata;
 353 }
 354
 355 char* InspIRCd::ModuleError()
 356 {
 357         return MODERR;
 358 }
 359
 360 void InspIRCd::EraseFactory(int j)
 361 {
 362         int v = 0;
 363         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 364         {
 365                 if (v == j)
 366                 {
 367                         delete *t;
 368                         factory.erase(t);
 369                         factory.push_back(NULL);
 370                         return;
 371                 }
 372                 v++;
 373         }
 374 }
 375
 376 void InspIRCd::EraseModule(int j)
 377 {
 378         int v1 = 0;
 379         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 380         {
 381                 if (v1 == j)
 382                 {
 383                         DELETE(*m);
 384                         modules.erase(m);
 385                         modules.push_back(NULL);
 386                         break;
 387                 }
 388                 v1++;
 389         }
 390         int v2 = 0;
 391         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 392         {
 393                 if (v2 == j)
 394                 {
 395                        Config->module_names.erase(v);
 396                        break;
 397                 }
 398                 v2++;
 399         }
 400
 401 }
 402
 403 void InspIRCd::MoveTo(std::string modulename,int slot)
 404 {
 405         unsigned int v2 = 256;
 406         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 407         {
 408                 if (Config->module_names[v] == modulename)
 409                 {
 410                         // found an instance, swap it with the item at the end
 411                         v2 = v;
 412                         break;
 413                 }
 414         }
 415         if ((v2 != (unsigned int)slot) && (v2 < 256))
 416         {
 417                 // Swap the module names over
 418                 Config->module_names[v2] = Config->module_names[slot];
 419                 Config->module_names[slot] = modulename;
 420                 // now swap the module factories
 421                 ircd_module* temp = factory[v2];
 422                 factory[v2] = factory[slot];
 423                 factory[slot] = temp;
 424                 // now swap the module objects
 425                 Module* temp_module = modules[v2];
 426                 modules[v2] = modules[slot];
 427                 modules[slot] = temp_module;
 428                 // now swap the implement lists (we dont
 429                 // need to swap the global or recount it)
 430                 for (int n = 0; n < 255; n++)
 431                 {
 432                         char x = Config->implement_lists[v2][n];
 433                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 434                         Config->implement_lists[slot][n] = x;
 435                 }
 436         }
 437         else
 438         {
 439                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 440         }
 441 }
 442
 443 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 444 {
 445         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 446         {
 447                 if (Config->module_names[v] == after)
 448                 {
 449                         MoveTo(modulename, v);
 450                         return;
 451                 }
 452         }
 453 }
 454
 455 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 456 {
 457         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 458         {
 459                 if (Config->module_names[v] == before)
 460                 {
 461                         if (v > 0)
 462                         {
 463                                 MoveTo(modulename, v-1);
 464                         }
 465                         else
 466                         {
 467                                 MoveTo(modulename, v);
 468                         }
 469                         return;
 470                 }
 471         }
 472 }
 473
 474 void InspIRCd::MoveToFirst(std::string modulename)
 475 {
 476         MoveTo(modulename,0);
 477 }
 478
 479 void InspIRCd::MoveToLast(std::string modulename)
 480 {
 481         MoveTo(modulename,this->GetModuleCount());
 482 }
 483
 484 void InspIRCd::BuildISupport()
 485 {
 486         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 487         std::stringstream v;
 488         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 489         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 490         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 491         Config->data005 = v.str();
 492         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 493 }
 494
 495 bool InspIRCd::UnloadModule(const char* filename)
 496 {
 497         std::string filename_str = filename;
 498         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 499         {
 500                 if (Config->module_names[j] == filename_str)
 501                 {
 502                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 503                         {
 504                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 505                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 506                                 return false;
 507                         }
 508                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 509                         if (intercount.first > 0)
 510                         {
 511                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 512                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 513                                                 intercount.first,
 514                                                 intercount.first > 1 ? "s" : "",
 515                                                 intercount.first > 1 ? "are" : "is",
 516                                                 intercount.second.c_str());
 517                                 return false;
 518                         }
 519                         /* Give the module a chance to tidy out all its metadata */
 520                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 521                         {
 522                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 523                         }
 524                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 525                         {
 526                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 527                         }
 528
 529                         /* Tidy up any dangling resolvers */
 530                         this->Res->CleanResolvers(modules[j]);
 531
 532                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 533
 534                         for(int t = 0; t < 255; t++)
 535                         {
 536                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 537                         }
 538
 539                         /* We have to renumber implement_lists after unload because the module numbers change!
 540                          */
 541                         for(int j2 = j; j2 < 254; j2++)
 542                         {
 543                                 for(int t = 0; t < 255; t++)
 544                                 {
 545                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 546                                 }
 547                         }
 548
 549                         // found the module
 550                         this->Log(DEBUG,"Removing dependent commands...");
 551                         Parser->RemoveCommands(filename);
 552                         this->Log(DEBUG,"Deleting module...");
 553                         this->EraseModule(j);
 554                         this->Log(DEBUG,"Erasing module entry...");
 555                         this->EraseFactory(j);
 556                         this->Log(DEFAULT,"Module %s unloaded",filename);
 557                         this->ModCount--;
 558                         BuildISupport();
 559                         return true;
 560                 }
 561         }
 562         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 563         snprintf(MODERR,MAXBUF,"Module not loaded");
 564         return false;
 565 }
 566
 567 bool InspIRCd::LoadModule(const char* filename)
 568 {
 569         /* Do we have a glob pattern in the filename?
 570          * The user wants to load multiple modules which
 571          * match the pattern.
 572          */
 573         if (strchr(filename,'*') || (strchr(filename,'?')))
 574         {
 575                 int n_match = 0;
 576                 DIR* library = opendir(Config->ModPath);
 577                 if (library)
 578                 {
 579                         /* Try and locate and load all modules matching the pattern */
 580                         dirent* entry = NULL;
 581                         while ((entry = readdir(library)))
 582                         {
 583                                 if (this->MatchText(entry->d_name, filename))
 584                                 {
 585                                         if (!this->LoadModule(entry->d_name))
 586                                                 n_match++;
 587                                 }
 588                         }
 589                         closedir(library);
 590                 }
 591                 /* Loadmodule will now return false if any one of the modules failed
 592                  * to load (but wont abort when it encounters a bad one) and when 1 or
 593                  * more modules were actually loaded.
 594                  */
 595                 return (n_match > 0);
 596         }
 597
 598         char modfile[MAXBUF];
 599         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 600         std::string filename_str = filename;
 601
 602         if (!ServerConfig::DirValid(modfile))
 603         {
 604                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 605                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 606                 return false;
 607         }
 608         this->Log(DEBUG,"Loading module: %s",modfile);
 609
 610         if (ServerConfig::FileExists(modfile))
 611         {
 612
 613                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 614                 {
 615                         if (Config->module_names[j] == filename_str)
 616                         {
 617                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 618                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 619                                 return false;
 620                         }
 621                 }
 622                 try
 623                 {
 624                         ircd_module* a = new ircd_module(this, modfile);
 625                         factory[this->ModCount+1] = a;
 626                         if (factory[this->ModCount+1]->LastError())
 627                         {
 628                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 629                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 630                                 return false;
 631                         }
 632                         if ((long)factory[this->ModCount+1]->factory != -1)
 633                         {
 634                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 635
 636                                 Version v = m->GetVersion();
 637
 638                                 if (v.API != API_VERSION)
 639                                 {
 640                                         delete m;
 641                                         delete a;
 642                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 643                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 644                                         return false;
 645                                 }
 646                                 else
 647                                 {
 648                                         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]"));
 649                                 }
 650
 651                                 modules[this->ModCount+1] = m;
 652                                 /* save the module and the module's classfactory, if
 653                                  * this isnt done, random crashes can occur :/ */
 654                                 Config->module_names.push_back(filename);
 655
 656                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 657                                 for(int t = 0; t < 255; t++)
 658                                         x[t] = 0;
 659
 660                                 modules[this->ModCount+1]->Implements(x);
 661
 662                                 for(int t = 0; t < 255; t++)
 663                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 664                         }
 665                         else
 666                         {
 667                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 668                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 669                                 return false;
 670                         }
 671                 }
 672                 catch (ModuleException& modexcept)
 673                 {
 674                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 675                         snprintf(MODERR,MAXBUF,"Factory function threw an exception: %s",modexcept.GetReason());
 676                         return false;
 677                 }
 678         }
 679         else
 680         {
 681                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 682                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 683                 return false;
 684         }
 685         this->ModCount++;
 686         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 687         // now work out which modules, if any, want to move to the back of the queue,
 688         // and if they do, move them there.
 689         std::vector<std::string> put_to_back;
 690         std::vector<std::string> put_to_front;
 691         std::map<std::string,std::string> put_before;
 692         std::map<std::string,std::string> put_after;
 693         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 694         {
 695                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 696                         put_to_back.push_back(Config->module_names[j]);
 697                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 698                         put_to_front.push_back(Config->module_names[j]);
 699                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 700                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 701                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 702                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 703         }
 704         for (unsigned int j = 0; j < put_to_back.size(); j++)
 705                 MoveToLast(put_to_back[j]);
 706         for (unsigned int j = 0; j < put_to_front.size(); j++)
 707                 MoveToFirst(put_to_front[j]);
 708         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 709                 MoveBefore(j->first,j->second);
 710         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 711                 MoveAfter(j->first,j->second);
 712         BuildISupport();
 713         return true;
 714 }
 715
 716 void InspIRCd::DoOneIteration(bool process_module_sockets)
 717 {
 718         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 719          * Once per loop iteration is pleanty.
 720          */
 721         OLDTIME = TIME;
 722         TIME = time(NULL);
 723
 724         /* Run background module timers every few seconds
 725          * (the docs say modules shouldnt rely on accurate
 726          * timing using this event, so we dont have to
 727          * time this exactly).
 728          */
 729         if (TIME != OLDTIME)
 730         {
 731                 if (TIME < OLDTIME)
 732                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 733                 if ((TIME % 3600) == 0)
 734                 {
 735                         irc::whowas::MaintainWhoWas(this, TIME);
 736                 }
 737                 Timers->TickTimers(TIME);
 738                 this->DoBackgroundUserStuff(TIME);
 739
 740                 if ((TIME % 5) == 0)
 741                 {
 742                         XLines->expire_lines();
 743                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 744                         Timers->TickMissedTimers(TIME);
 745                 }
 746         }
 747
 748         /* Call the socket engine to wait on the active
 749          * file descriptors. The socket engine has everything's
 750          * descriptors in its list... dns, modules, users,
 751          * servers... so its nice and easy, just one call.
 752          * This will cause any read or write events to be
 753          * dispatched to their handlers.
 754          */
 755         SE->DispatchEvents();
 756 }
 757
 758 bool InspIRCd::IsIdent(const char* n)
 759 {
 760         if (!n || !*n)
 761                 return false;
 762
 763         for (char* i = (char*)n; *i; i++)
 764         {
 765                 if ((*i >= 'A') && (*i <= '}'))
 766                 {
 767                         continue;
 768                 }
 769                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 770                 {
 771                         continue;
 772                 }
 773                 return false;
 774         }
 775         return true;
 776 }
 777
 778
 779 int InspIRCd::Run()
 780 {
 781         while (true)
 782         {
 783                 DoOneIteration(true);
 784         }
 785         /* This is never reached -- we hope! */
 786         return 0;
 787 }
 788
 789 /**********************************************************************************/
 790
 791 /**
 792  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 793  */
 794
 795 int main(int argc, char** argv)
 796 {
 797         SI = new InspIRCd(argc, argv);
 798         SI->Run();
 799         delete SI;
 800         return 0;
 801 }
 802
 803 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 804  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 805  * registration timeout maximum seconds)
 806  */
 807 bool InspIRCd::AllModulesReportReady(userrec* user)
 808 {
 809         if (!Config->global_implementation[I_OnCheckReady])
 810                 return true;
 811
 812         for (int i = 0; i <= this->GetModuleCount(); i++)
 813         {
 814                 if (Config->implement_lists[i][I_OnCheckReady])
 815                 {
 816                         int res = modules[i]->OnCheckReady(user);
 817                         if (!res)
 818                                 return false;
 819                 }
 820         }
 821         return true;
 822 }
 823
 824 int InspIRCd::GetModuleCount()
 825 {
 826         return this->ModCount;
 827 }
 828
 829 time_t InspIRCd::Time(bool delta)
 830 {
 831         if (delta)
 832                 return TIME + time_delta;
 833         return TIME;
 834 }
 835
 836 int InspIRCd::SetTimeDelta(int delta)
 837 {
 838         int old = time_delta;
 839         time_delta += delta;
 840         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 841         return old;
 842 }
 843
 844 void InspIRCd::AddLocalClone(userrec* user)
 845 {
 846         clonemap::iterator x = local_clones.find(user->GetIPString());
 847         if (x != local_clones.end())
 848                 x->second++;
 849         else
 850                 local_clones[user->GetIPString()] = 1;
 851 }
 852
 853 void InspIRCd::AddGlobalClone(userrec* user)
 854 {
 855         clonemap::iterator y = global_clones.find(user->GetIPString());
 856         if (y != global_clones.end())
 857                 y->second++;
 858         else
 859                 global_clones[user->GetIPString()] = 1;
 860 }
 861
 862 int InspIRCd::GetTimeDelta()
 863 {
 864         return time_delta;
 865 }
 866
 867 bool FileLogger::Readable()
 868 {
 869         return false;
 870 }
 871
 872 void FileLogger::HandleEvent(EventType et, int errornum)
 873 {
 874         this->WriteLogLine("");
 875         ServerInstance->SE->DelFd(this);
 876 }
 877
 878 void FileLogger::WriteLogLine(const std::string &line)
 879 {
 880         if (line.length())
 881                 buffer.append(line);
 882
 883         if (log)
 884         {
 885                 int written = fprintf(log,"%s",buffer.c_str());
 886                 if ((written >= 0) && (written < (int)buffer.length()))
 887                 {
 888                         buffer.erase(0, buffer.length());
 889                         ServerInstance->SE->AddFd(this);
 890                 }
 891                 else if (written == -1)
 892                 {
 893                         if (errno == EAGAIN)
 894                                 ServerInstance->SE->AddFd(this);
 895                 }
 896                 else
 897                 {
 898                         /* Wrote the whole buffer, and no need for write callback */
 899                         buffer = "";
 900                 }
 901         }
 902         if (writeops++ % 20)
 903         {
 904                 fflush(log);
 905         }
 906 }
 907
 908 void FileLogger::Close()
 909 {
 910         if (log)
 911         {
 912                 int flags = fcntl(fileno(log), F_GETFL, 0);
 913                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
 914                 if (buffer.size())
 915                         fprintf(log,"%s",buffer.c_str());
 916                 fflush(log);
 917                 fclose(log);
 918         }
 919         buffer = "";
 920         ServerInstance->SE->DelFd(this);
 921 }
 922
 923 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
 924 {
 925         irc::sockets::NonBlocking(fileno(log));
 926         this->SetFd(fileno(log));
 927         buffer = "";
 928 }
 929
 930 FileLogger::~FileLogger()
 931 {
 932         this->Close();
 933 }
 934