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 <dlfcn.h>
  29
  30 using irc::sockets::NonBlocking;
  31 using irc::sockets::Blocking;
  32 using irc::sockets::insp_ntoa;
  33 using irc::sockets::insp_inaddr;
  34 using irc::sockets::insp_sockaddr;
  35
  36 InspIRCd* SI = NULL;
  37
  38 void InspIRCd::AddServerName(const std::string &servername)
  39 {
  40         this->Log(DEBUG,"Adding server name: %s",servername.c_str());
  41
  42         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  43                 servernames.push_back(servername); /* Wasn't already there. */
  44 }
  45
  46 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  47 {
  48         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  49
  50         if(iter == servernames.end())
  51         {
  52                 AddServerName(servername);
  53                 iter = --servernames.end();
  54         }
  55
  56         return iter->c_str();
  57 }
  58
  59 bool InspIRCd::FindServerName(const std::string &servername)
  60 {
  61         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
  62 }
  63
  64 void InspIRCd::Exit(int status)
  65 {
  66         exit (status);
  67 }
  68
  69 void InspIRCd::Restart(const std::string &reason)
  70 {
  71         std::vector<std::string> mymodnames;
  72         int MyModCount = ModCount;
  73
  74         /* SendError flushes each client's queue,
  75          * regardless of writeability state
  76          */
  77         this->SendError(reason);
  78
  79         for (unsigned int i = 0; i < stats->BoundPortCount; i++)
  80                 /* This calls the constructor and closes the listening socket */
  81                 delete Config->openSockfd[i];
  82
  83         /* We do this twice, so that any service providers get a chance to be
  84          * unhooked by the modules using them, but then get a chance to be
  85          * removed themsleves.
  86          */
  87         for (int tries = 0; tries < 2; tries++)
  88         {
  89                 mymodnames.clear();
  90
  91                 /* Unload all modules, so they get a chance to clean up their listeners */
  92                 for (int j = 0; j < ModCount; j++)
  93                         mymodnames.push_back(Config->module_names[j]);
  94
  95                 for (int k = 0; k < MyModCount; k++)
  96                         this->UnloadModule(mymodnames[k].c_str());
  97         }
  98
  99         /* Close all client sockets, or the new process inherits them */
 100         for (std::vector<userrec*>::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
 101                 (*i)->CloseSocket();
 102
 103         /* Figure out our filename (if theyve renamed it, we're boned) */
 104         std::string me = Config->MyDir + "/inspircd";
 105
 106         /* Close logging */
 107         this->Logger->Close();
 108
 109         if (execv(me.c_str(), Config->argv) == -1)
 110         {
 111                 /* Will raise a SIGABRT if not trapped */
 112                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 113         }
 114 }
 115
 116 void InspIRCd::Start()
 117 {
 118         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 119         printf("(C) InspIRCd Development Team.\033[0m\n\n");
 120         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey\033[0m\n");
 121         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 122 }
 123
 124 void InspIRCd::Rehash(int status)
 125 {
 126         SI->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
 127         fclose(SI->Config->log_file);
 128         SI->OpenLog(NULL,0);
 129         SI->Config->Read(false,NULL);
 130         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(""));
 131 }
 132
 133 void InspIRCd::SetSignals()
 134 {
 135         signal(SIGALRM, SIG_IGN);
 136         signal(SIGHUP, InspIRCd::Rehash);
 137         signal(SIGPIPE, SIG_IGN);
 138         signal(SIGTERM, InspIRCd::Exit);
 139         signal(SIGCHLD, SIG_IGN);
 140 }
 141
 142 bool InspIRCd::DaemonSeed()
 143 {
 144         int childpid;
 145         if ((childpid = fork ()) < 0)
 146                 return false;
 147         else if (childpid > 0)
 148         {
 149                 /* We wait here for the child process to kill us,
 150                  * so that the shell prompt doesnt come back over
 151                  * the output.
 152                  * Sending a kill with a signal of 0 just checks
 153                  * if the child pid is still around. If theyre not,
 154                  * they threw an error and we should give up.
 155                  */
 156                 while (kill(childpid, 0) != -1)
 157                         sleep(1);
 158                 exit(ERROR);
 159         }
 160         setsid ();
 161         umask (007);
 162         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 163
 164         rlimit rl;
 165         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 166         {
 167                 this->Log(DEFAULT,"Failed to getrlimit()!");
 168                 return false;
 169         }
 170         else
 171         {
 172                 rl.rlim_cur = rl.rlim_max;
 173                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 174                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 175         }
 176
 177         return true;
 178 }
 179
 180 void InspIRCd::WritePID(const std::string &filename)
 181 {
 182         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 183         if (*(fname.begin()) != '/')
 184         {
 185                 std::string::size_type pos;
 186                 std::string confpath = CONFIG_FILE;
 187                 if ((pos = confpath.find("/inspircd.conf")) != std::string::npos)
 188                 {
 189                         /* Leaves us with just the path */
 190                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 191                 }
 192         }
 193         std::ofstream outfile(fname.c_str());
 194         if (outfile.is_open())
 195         {
 196                 outfile << getpid();
 197                 outfile.close();
 198         }
 199         else
 200         {
 201                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 202                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 203                 Exit(0);
 204         }
 205 }
 206
 207 std::string InspIRCd::GetRevision()
 208 {
 209         return REVISION;
 210 }
 211
 212 InspIRCd::InspIRCd(int argc, char** argv)
 213         : 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)
 214 {
 215         int found_ports = 0;
 216         FailedPortList pl;
 217
 218         modules.resize(255);
 219         factory.resize(255);
 220
 221         this->Config = new ServerConfig(this);
 222         this->Config->opertypes.clear();
 223         this->Config->operclass.clear();
 224         this->SNO = new SnomaskManager(this);
 225         this->Start();
 226         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 227         this->time_delta = 0;
 228         this->next_call = this->TIME + 3;
 229         srand(this->TIME);
 230         this->Log(DEBUG,"*** InspIRCd starting up!");
 231         if (!ServerConfig::FileExists(CONFIG_FILE))
 232         {
 233                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 234                 this->Log(DEFAULT,"main: no config");
 235                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 236                 Exit(ERROR);
 237         }
 238         *this->LogFileName = 0;
 239         if (argc > 1) {
 240                 for (int i = 1; i < argc; i++)
 241                 {
 242                         if (!strcmp(argv[i],"-nofork"))
 243                         {
 244                                 Config->nofork = true;
 245                         }
 246                         else if(!strcmp(argv[i],"-debug"))
 247                         {
 248                                 Config->forcedebug = true;
 249                         }
 250                         else if(!strcmp(argv[i],"-nolog"))
 251                         {
 252                                 Config->writelog = false;
 253                         }
 254                         else if (!strcmp(argv[i],"-wait"))
 255                         {
 256                                 sleep(6);
 257                         }
 258                         else if (!strcmp(argv[i],"-logfile"))
 259                         {
 260                                 if (argc > i+1)
 261                                 {
 262                                         strlcpy(LogFileName,argv[i+1],MAXBUF);
 263                                         printf("LOG: Setting logfile to %s\n",LogFileName);
 264                                 }
 265                                 else
 266                                 {
 267                                         printf("ERROR: The -logfile parameter must be followed by a log file name and path.\n");
 268                                         Exit(ERROR);
 269                                 }
 270                                 i++;
 271                         }
 272                         else
 273                         {
 274                                 printf("Usage: %s [-nofork] [-nolog] [-debug] [-wait] [-logfile <filename>]\n",argv[0]);
 275                                 Exit(ERROR);
 276                         }
 277                 }
 278         }
 279
 280         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 281
 282         this->OpenLog(argv, argc);
 283         this->stats = new serverstats();
 284         this->Parser = new CommandParser(this);
 285         this->Timers = new TimerManager();
 286         this->XLines = new XLineManager(this);
 287         Config->ClearStack();
 288         Config->Read(true, NULL);
 289         this->CheckRoot();
 290         this->Modes = new ModeParser(this);
 291         this->AddServerName(Config->ServerName);
 292         CheckDie();
 293         InitializeDisabledCommands(Config->DisabledCommands, this);
 294         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 295
 296         for(int t = 0; t < 255; t++)
 297                 Config->global_implementation[t] = 0;
 298
 299         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 300
 301         printf("\n");
 302         this->SetSignals();
 303         if (!Config->nofork)
 304         {
 305                 if (!this->DaemonSeed())
 306                 {
 307                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 308                         Exit(ERROR);
 309                 }
 310         }
 311
 312         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 313          * initialize the socket engine.
 314          */
 315         SocketEngineFactory* SEF = new SocketEngineFactory();
 316         SE = SEF->Create(this);
 317         delete SEF;
 318
 319         this->Res = new DNS(this);
 320
 321         this->LoadAllModules();
 322         /* Just in case no modules were loaded - fix for bug #101 */
 323         this->BuildISupport();
 324
 325         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 326         {
 327                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 328                 Exit(ERROR);
 329         }
 330
 331         if (stats->BoundPortCount != (unsigned int)found_ports)
 332         {
 333                 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);
 334                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 335                 int j = 1;
 336                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 337                 {
 338                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 339                 }
 340         }
 341
 342         /* Add the listening sockets used for client inbound connections
 343          * to the socket engine
 344          */
 345         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 346         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 347         {
 348                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]->GetFd());
 349                 if (!SE->AddFd(Config->openSockfd[count]))
 350                 {
 351                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 352                         Exit(ERROR);
 353                 }
 354         }
 355
 356         if (!Config->nofork)
 357         {
 358                 if (kill(getppid(), SIGTERM) == -1)
 359                         printf("Error killing parent process: %s\n",strerror(errno));
 360                 fclose(stdin);
 361                 fclose(stderr);
 362                 fclose(stdout);
 363         }
 364
 365         printf("\nInspIRCd is now running!\n");
 366
 367         this->WritePID(Config->PID);
 368 }
 369
 370 std::string InspIRCd::GetVersionString()
 371 {
 372         char versiondata[MAXBUF];
 373         char dnsengine[] = "singlethread-object";
 374         if (*Config->CustomVersion)
 375         {
 376                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 377         }
 378         else
 379         {
 380                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 381         }
 382         return versiondata;
 383 }
 384
 385 char* InspIRCd::ModuleError()
 386 {
 387         return MODERR;
 388 }
 389
 390 void InspIRCd::EraseFactory(int j)
 391 {
 392         int v = 0;
 393         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 394         {
 395                 if (v == j)
 396                 {
 397                         delete *t;
 398                         factory.erase(t);
 399                         factory.push_back(NULL);
 400                         return;
 401                 }
 402                 v++;
 403         }
 404 }
 405
 406 void InspIRCd::EraseModule(int j)
 407 {
 408         int v1 = 0;
 409         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 410         {
 411                 if (v1 == j)
 412                 {
 413                         DELETE(*m);
 414                         modules.erase(m);
 415                         modules.push_back(NULL);
 416                         break;
 417                 }
 418                 v1++;
 419         }
 420         int v2 = 0;
 421         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 422         {
 423                 if (v2 == j)
 424                 {
 425                        Config->module_names.erase(v);
 426                        break;
 427                 }
 428                 v2++;
 429         }
 430
 431 }
 432
 433 void InspIRCd::MoveTo(std::string modulename,int slot)
 434 {
 435         unsigned int v2 = 256;
 436         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 437         {
 438                 if (Config->module_names[v] == modulename)
 439                 {
 440                         // found an instance, swap it with the item at the end
 441                         v2 = v;
 442                         break;
 443                 }
 444         }
 445         if ((v2 != (unsigned int)slot) && (v2 < 256))
 446         {
 447                 // Swap the module names over
 448                 Config->module_names[v2] = Config->module_names[slot];
 449                 Config->module_names[slot] = modulename;
 450                 // now swap the module factories
 451                 ircd_module* temp = factory[v2];
 452                 factory[v2] = factory[slot];
 453                 factory[slot] = temp;
 454                 // now swap the module objects
 455                 Module* temp_module = modules[v2];
 456                 modules[v2] = modules[slot];
 457                 modules[slot] = temp_module;
 458                 // now swap the implement lists (we dont
 459                 // need to swap the global or recount it)
 460                 for (int n = 0; n < 255; n++)
 461                 {
 462                         char x = Config->implement_lists[v2][n];
 463                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 464                         Config->implement_lists[slot][n] = x;
 465                 }
 466         }
 467         else
 468         {
 469                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 470         }
 471 }
 472
 473 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 474 {
 475         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 476         {
 477                 if (Config->module_names[v] == after)
 478                 {
 479                         MoveTo(modulename, v);
 480                         return;
 481                 }
 482         }
 483 }
 484
 485 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 486 {
 487         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 488         {
 489                 if (Config->module_names[v] == before)
 490                 {
 491                         if (v > 0)
 492                         {
 493                                 MoveTo(modulename, v-1);
 494                         }
 495                         else
 496                         {
 497                                 MoveTo(modulename, v);
 498                         }
 499                         return;
 500                 }
 501         }
 502 }
 503
 504 void InspIRCd::MoveToFirst(std::string modulename)
 505 {
 506         MoveTo(modulename,0);
 507 }
 508
 509 void InspIRCd::MoveToLast(std::string modulename)
 510 {
 511         MoveTo(modulename,this->GetModuleCount());
 512 }
 513
 514 void InspIRCd::BuildISupport()
 515 {
 516         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 517         std::stringstream v;
 518         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 519         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 520         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 521         Config->data005 = v.str();
 522         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 523         Config->Update005();
 524 }
 525
 526 bool InspIRCd::UnloadModule(const char* filename)
 527 {
 528         std::string filename_str = filename;
 529         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 530         {
 531                 if (Config->module_names[j] == filename_str)
 532                 {
 533                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 534                         {
 535                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 536                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 537                                 return false;
 538                         }
 539                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 540                         if (intercount.first > 0)
 541                         {
 542                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 543                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 544                                                 intercount.first,
 545                                                 intercount.first > 1 ? "s" : "",
 546                                                 intercount.first > 1 ? "are" : "is",
 547                                                 intercount.second.c_str());
 548                                 return false;
 549                         }
 550                         /* Give the module a chance to tidy out all its metadata */
 551                         for (chan_hash::iterator c = this->chanlist.begin(); c != this->chanlist.end(); c++)
 552                         {
 553                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 554                         }
 555                         for (user_hash::iterator u = this->clientlist.begin(); u != this->clientlist.end(); u++)
 556                         {
 557                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 558                         }
 559
 560                         /* Tidy up any dangling resolvers */
 561                         this->Res->CleanResolvers(modules[j]);
 562
 563                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 564
 565                         for(int t = 0; t < 255; t++)
 566                         {
 567                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 568                         }
 569
 570                         /* We have to renumber implement_lists after unload because the module numbers change!
 571                          */
 572                         for(int j2 = j; j2 < 254; j2++)
 573                         {
 574                                 for(int t = 0; t < 255; t++)
 575                                 {
 576                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 577                                 }
 578                         }
 579
 580                         // found the module
 581                         this->Log(DEBUG,"Removing dependent commands...");
 582                         Parser->RemoveCommands(filename);
 583                         this->Log(DEBUG,"Deleting module...");
 584                         this->EraseModule(j);
 585                         this->Log(DEBUG,"Erasing module entry...");
 586                         this->EraseFactory(j);
 587                         this->Log(DEFAULT,"Module %s unloaded",filename);
 588                         this->ModCount--;
 589                         BuildISupport();
 590                         return true;
 591                 }
 592         }
 593         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 594         snprintf(MODERR,MAXBUF,"Module not loaded");
 595         return false;
 596 }
 597
 598 bool InspIRCd::LoadModule(const char* filename)
 599 {
 600         /* Do we have a glob pattern in the filename?
 601          * The user wants to load multiple modules which
 602          * match the pattern.
 603          */
 604         if (strchr(filename,'*') || (strchr(filename,'?')))
 605         {
 606                 int n_match = 0;
 607                 DIR* library = opendir(Config->ModPath);
 608                 if (library)
 609                 {
 610                         /* Try and locate and load all modules matching the pattern */
 611                         dirent* entry = NULL;
 612                         while ((entry = readdir(library)))
 613                         {
 614                                 if (this->MatchText(entry->d_name, filename))
 615                                 {
 616                                         if (!this->LoadModule(entry->d_name))
 617                                                 n_match++;
 618                                 }
 619                         }
 620                         closedir(library);
 621                 }
 622                 /* Loadmodule will now return false if any one of the modules failed
 623                  * to load (but wont abort when it encounters a bad one) and when 1 or
 624                  * more modules were actually loaded.
 625                  */
 626                 return (n_match > 0);
 627         }
 628
 629         char modfile[MAXBUF];
 630         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 631         std::string filename_str = filename;
 632
 633         if (!ServerConfig::DirValid(modfile))
 634         {
 635                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 636                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 637                 return false;
 638         }
 639         this->Log(DEBUG,"Loading module: %s",modfile);
 640
 641         if (ServerConfig::FileExists(modfile))
 642         {
 643
 644                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 645                 {
 646                         if (Config->module_names[j] == filename_str)
 647                         {
 648                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 649                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 650                                 return false;
 651                         }
 652                 }
 653                 try
 654                 {
 655                         ircd_module* a = new ircd_module(this, modfile);
 656                         factory[this->ModCount+1] = a;
 657                         if (factory[this->ModCount+1]->LastError())
 658                         {
 659                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 660                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 661                                 return false;
 662                         }
 663                         if ((long)factory[this->ModCount+1]->factory != -1)
 664                         {
 665                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 666
 667                                 Version v = m->GetVersion();
 668
 669                                 if (v.API != API_VERSION)
 670                                 {
 671                                         delete m;
 672                                         delete a;
 673                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 674                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 675                                         return false;
 676                                 }
 677                                 else
 678                                 {
 679                                         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]"));
 680                                 }
 681
 682                                 modules[this->ModCount+1] = m;
 683                                 /* save the module and the module's classfactory, if
 684                                  * this isnt done, random crashes can occur :/ */
 685                                 Config->module_names.push_back(filename);
 686
 687                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 688                                 for(int t = 0; t < 255; t++)
 689                                         x[t] = 0;
 690
 691                                 modules[this->ModCount+1]->Implements(x);
 692
 693                                 for(int t = 0; t < 255; t++)
 694                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 695                         }
 696                         else
 697                         {
 698                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 699                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 700                                 return false;
 701                         }
 702                 }
 703                 catch (CoreException& modexcept)
 704                 {
 705                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 706                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 707                         return false;
 708                 }
 709         }
 710         else
 711         {
 712                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 713                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 714                 return false;
 715         }
 716         this->ModCount++;
 717         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 718         // now work out which modules, if any, want to move to the back of the queue,
 719         // and if they do, move them there.
 720         std::vector<std::string> put_to_back;
 721         std::vector<std::string> put_to_front;
 722         std::map<std::string,std::string> put_before;
 723         std::map<std::string,std::string> put_after;
 724         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 725         {
 726                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 727                         put_to_back.push_back(Config->module_names[j]);
 728                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 729                         put_to_front.push_back(Config->module_names[j]);
 730                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 731                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 732                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 733                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 734         }
 735         for (unsigned int j = 0; j < put_to_back.size(); j++)
 736                 MoveToLast(put_to_back[j]);
 737         for (unsigned int j = 0; j < put_to_front.size(); j++)
 738                 MoveToFirst(put_to_front[j]);
 739         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 740                 MoveBefore(j->first,j->second);
 741         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 742                 MoveAfter(j->first,j->second);
 743         BuildISupport();
 744         return true;
 745 }
 746
 747 void InspIRCd::DoOneIteration(bool process_module_sockets)
 748 {
 749         static rusage ru;
 750
 751         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 752          * Once per loop iteration is pleanty.
 753          */
 754         OLDTIME = TIME;
 755         TIME = time(NULL);
 756
 757         /* Run background module timers every few seconds
 758          * (the docs say modules shouldnt rely on accurate
 759          * timing using this event, so we dont have to
 760          * time this exactly).
 761          */
 762         if (TIME != OLDTIME)
 763         {
 764                 if (TIME < OLDTIME)
 765                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 766                 if ((TIME % 3600) == 0)
 767                 {
 768                         irc::whowas::MaintainWhoWas(this, TIME);
 769                 }
 770                 Timers->TickTimers(TIME);
 771                 this->DoBackgroundUserStuff(TIME);
 772
 773                 if ((TIME % 5) == 0)
 774                 {
 775                         XLines->expire_lines();
 776                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 777                         Timers->TickMissedTimers(TIME);
 778                 }
 779
 780                 if (!getrusage(0, &ru))
 781                 {
 782                         gettimeofday(&this->stats->LastSampled, NULL);
 783                         this->stats->LastCPU = ru.ru_utime;
 784                 }
 785         }
 786
 787         /* Call the socket engine to wait on the active
 788          * file descriptors. The socket engine has everything's
 789          * descriptors in its list... dns, modules, users,
 790          * servers... so its nice and easy, just one call.
 791          * This will cause any read or write events to be
 792          * dispatched to their handlers.
 793          */
 794         SE->DispatchEvents();
 795 }
 796
 797 bool InspIRCd::IsIdent(const char* n)
 798 {
 799         if (!n || !*n)
 800                 return false;
 801
 802         for (char* i = (char*)n; *i; i++)
 803         {
 804                 if ((*i >= 'A') && (*i <= '}'))
 805                 {
 806                         continue;
 807                 }
 808                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 809                 {
 810                         continue;
 811                 }
 812                 return false;
 813         }
 814         return true;
 815 }
 816
 817
 818 int InspIRCd::Run()
 819 {
 820         while (true)
 821         {
 822                 DoOneIteration(true);
 823         }
 824         /* This is never reached -- we hope! */
 825         return 0;
 826 }
 827
 828 /**********************************************************************************/
 829
 830 /**
 831  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 832  */
 833
 834 int main(int argc, char** argv)
 835 {
 836         SI = new InspIRCd(argc, argv);
 837         SI->Run();
 838         delete SI;
 839         return 0;
 840 }
 841
 842 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 843  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 844  * registration timeout maximum seconds)
 845  */
 846 bool InspIRCd::AllModulesReportReady(userrec* user)
 847 {
 848         if (!Config->global_implementation[I_OnCheckReady])
 849                 return true;
 850
 851         for (int i = 0; i <= this->GetModuleCount(); i++)
 852         {
 853                 if (Config->implement_lists[i][I_OnCheckReady])
 854                 {
 855                         int res = modules[i]->OnCheckReady(user);
 856                         if (!res)
 857                                 return false;
 858                 }
 859         }
 860         return true;
 861 }
 862
 863 int InspIRCd::GetModuleCount()
 864 {
 865         return this->ModCount;
 866 }
 867
 868 time_t InspIRCd::Time(bool delta)
 869 {
 870         if (delta)
 871                 return TIME + time_delta;
 872         return TIME;
 873 }
 874
 875 int InspIRCd::SetTimeDelta(int delta)
 876 {
 877         int old = time_delta;
 878         time_delta += delta;
 879         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 880         return old;
 881 }
 882
 883 void InspIRCd::AddLocalClone(userrec* user)
 884 {
 885         clonemap::iterator x = local_clones.find(user->GetIPString());
 886         if (x != local_clones.end())
 887                 x->second++;
 888         else
 889                 local_clones[user->GetIPString()] = 1;
 890 }
 891
 892 void InspIRCd::AddGlobalClone(userrec* user)
 893 {
 894         clonemap::iterator y = global_clones.find(user->GetIPString());
 895         if (y != global_clones.end())
 896                 y->second++;
 897         else
 898                 global_clones[user->GetIPString()] = 1;
 899 }
 900
 901 int InspIRCd::GetTimeDelta()
 902 {
 903         return time_delta;
 904 }
 905
 906 bool FileLogger::Readable()
 907 {
 908         return false;
 909 }
 910
 911 void FileLogger::HandleEvent(EventType et, int errornum)
 912 {
 913         this->WriteLogLine("");
 914         ServerInstance->SE->DelFd(this);
 915 }
 916
 917 void FileLogger::WriteLogLine(const std::string &line)
 918 {
 919         if (line.length())
 920                 buffer.append(line);
 921
 922         if (log)
 923         {
 924                 int written = fprintf(log,"%s",buffer.c_str());
 925                 if ((written >= 0) && (written < (int)buffer.length()))
 926                 {
 927                         buffer.erase(0, buffer.length());
 928                         ServerInstance->SE->AddFd(this);
 929                 }
 930                 else if (written == -1)
 931                 {
 932                         if (errno == EAGAIN)
 933                                 ServerInstance->SE->AddFd(this);
 934                 }
 935                 else
 936                 {
 937                         /* Wrote the whole buffer, and no need for write callback */
 938                         buffer = "";
 939                 }
 940         }
 941         if (writeops++ % 20)
 942         {
 943                 fflush(log);
 944         }
 945 }
 946
 947 void FileLogger::Close()
 948 {
 949         if (log)
 950         {
 951                 int flags = fcntl(fileno(log), F_GETFL, 0);
 952                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
 953                 if (buffer.size())
 954                         fprintf(log,"%s",buffer.c_str());
 955                 fflush(log);
 956                 fclose(log);
 957         }
 958         buffer = "";
 959         ServerInstance->SE->DelFd(this);
 960 }
 961
 962 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
 963 {
 964         irc::sockets::NonBlocking(fileno(log));
 965         this->SetFd(fileno(log));
 966         buffer = "";
 967 }
 968
 969 FileLogger::~FileLogger()
 970 {
 971         this->Close();
 972 }
 973