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