src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "configreader.h"
  16 #include <signal.h>
  17 #include <dirent.h>
  18 #include <exception>
  19 #include <fstream>
  20 #include <unistd.h>
  21 #include "modules.h"
  22 #include "mode.h"
  23 #include "xline.h"
  24 #include "socketengine.h"
  25 #include "inspircd_se_config.h"
  26 #include "socket.h"
  27 #include "typedefs.h"
  28 #include "command_parse.h"
  29 #include "exitcodes.h"
  30 #include <dlfcn.h>
  31 #include <getopt.h>
  32
  33 using irc::sockets::NonBlocking;
  34 using irc::sockets::Blocking;
  35 using irc::sockets::insp_ntoa;
  36 using irc::sockets::insp_inaddr;
  37 using irc::sockets::insp_sockaddr;
  38
  39 InspIRCd* SI = NULL;
  40
  41 void InspIRCd::AddServerName(const std::string &servername)
  42 {
  43         this->Log(DEBUG,"Adding server name: %s",servername.c_str());
  44
  45         if(find(servernames.begin(), servernames.end(), servername) == servernames.end())
  46                 servernames.push_back(servername); /* Wasn't already there. */
  47 }
  48
  49 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
  50 {
  51         servernamelist::iterator iter = find(servernames.begin(), servernames.end(), servername);
  52
  53         if(iter == servernames.end())
  54         {
  55                 AddServerName(servername);
  56                 iter = --servernames.end();
  57         }
  58
  59         return iter->c_str();
  60 }
  61
  62 bool InspIRCd::FindServerName(const std::string &servername)
  63 {
  64         return (find(servernames.begin(), servernames.end(), servername) != servernames.end());
  65 }
  66
  67 void InspIRCd::Exit(int status)
  68 {
  69         if (SI)
  70         {
  71                 SI->SendError("Exiting with status " + ConvToStr(status) + " (" + std::string(ExitCodes[status]) + ")");
  72                 SI->Cleanup();
  73         }
  74         exit (status);
  75 }
  76
  77 void InspIRCd::Cleanup()
  78 {
  79         std::vector<std::string> mymodnames;
  80         int MyModCount = this->GetModuleCount();
  81
  82         for (unsigned int i = 0; i < stats->BoundPortCount; i++)
  83                 /* This calls the constructor and closes the listening socket */
  84                 delete Config->openSockfd[i];
  85
  86         /* We do this more than once, so that any service providers get a
  87          * chance to be unhooked by the modules using them, but then get
  88          * a chance to be removed themsleves.
  89          */
  90         for (int tries = 0; tries < 3; tries++)
  91         {
  92                 MyModCount = this->GetModuleCount();
  93                 mymodnames.clear();
  94
  95                 /* Unload all modules, so they get a chance to clean up their listeners */
  96                 for (int j = 0; j <= MyModCount; j++)
  97                         mymodnames.push_back(Config->module_names[j]);
  98
  99                 for (int k = 0; k <= MyModCount; k++)
 100                         this->UnloadModule(mymodnames[k].c_str());
 101         }
 102
 103         /* Close all client sockets, or the new process inherits them */
 104         for (std::vector<userrec*>::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
 105                 (*i)->CloseSocket();
 106
 107         /* Close logging */
 108         this->Logger->Close();
 109 }
 110
 111 void InspIRCd::Restart(const std::string &reason)
 112 {
 113         /* SendError flushes each client's queue,
 114          * regardless of writeability state
 115          */
 116         this->SendError(reason);
 117
 118         this->Cleanup();
 119
 120         /* Figure out our filename (if theyve renamed it, we're boned) */
 121         std::string me = Config->MyDir + "/inspircd";
 122
 123         if (execv(me.c_str(), Config->argv) == -1)
 124         {
 125                 /* Will raise a SIGABRT if not trapped */
 126                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 127         }
 128 }
 129
 130 void InspIRCd::Start()
 131 {
 132         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 133         printf("(C) InspIRCd Development Team.\033[0m\n\n");
 134         printf("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey\033[0m\n");
 135         printf("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 136 }
 137
 138 void InspIRCd::Rehash(int status)
 139 {
 140         SI->WriteOpers("Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(CONFIG_FILE));
 141         SI->CloseLog();
 142         SI->OpenLog(SI->Config->argv, SI->Config->argc);
 143         SI->RehashUsersAndChans();
 144         FOREACH_MOD_I(SI, I_OnGarbageCollect, OnGarbageCollect());
 145         SI->Config->Read(false,NULL);
 146         SI->Res->Rehash();
 147         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(NULL,""));
 148 }
 149
 150 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 151  * we must occasionally rehash the hash (yes really).
 152  * We do this by copying the entries from the old hash to a new hash, causing all
 153  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 154  * very expensive, so instead we do it when the user types /REHASH and expects a
 155  * short delay anyway.
 156  */
 157 void InspIRCd::RehashUsersAndChans()
 158 {
 159         user_hash* old_users = this->clientlist;
 160         chan_hash* old_chans = this->chanlist;
 161
 162         this->clientlist = new user_hash();
 163         this->chanlist = new chan_hash();
 164
 165         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 166                 this->clientlist->insert(*n);
 167
 168         delete old_users;
 169
 170         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 171                 this->chanlist->insert(*n);
 172
 173         delete old_chans;
 174 }
 175
 176 void InspIRCd::CloseLog()
 177 {
 178         this->Logger->Close();
 179 }
 180
 181 void InspIRCd::SetSignals()
 182 {
 183         signal(SIGALRM, SIG_IGN);
 184         signal(SIGHUP, InspIRCd::Rehash);
 185         signal(SIGPIPE, SIG_IGN);
 186         signal(SIGTERM, InspIRCd::Exit);
 187         signal(SIGCHLD, SIG_IGN);
 188 }
 189
 190 bool InspIRCd::DaemonSeed()
 191 {
 192         int childpid;
 193         if ((childpid = fork ()) < 0)
 194                 return false;
 195         else if (childpid > 0)
 196         {
 197                 /* We wait here for the child process to kill us,
 198                  * so that the shell prompt doesnt come back over
 199                  * the output.
 200                  * Sending a kill with a signal of 0 just checks
 201                  * if the child pid is still around. If theyre not,
 202                  * they threw an error and we should give up.
 203                  */
 204                 while (kill(childpid, 0) != -1)
 205                         sleep(1);
 206                 exit(0);
 207         }
 208         setsid ();
 209         umask (007);
 210         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 211
 212         rlimit rl;
 213         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 214         {
 215                 this->Log(DEFAULT,"Failed to getrlimit()!");
 216                 return false;
 217         }
 218         else
 219         {
 220                 rl.rlim_cur = rl.rlim_max;
 221                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 222                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 223         }
 224
 225         return true;
 226 }
 227
 228 void InspIRCd::WritePID(const std::string &filename)
 229 {
 230         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 231         if (*(fname.begin()) != '/')
 232         {
 233                 std::string::size_type pos;
 234                 std::string confpath = CONFIG_FILE;
 235                 if ((pos = confpath.find("/inspircd.conf")) != std::string::npos)
 236                 {
 237                         /* Leaves us with just the path */
 238                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 239                 }
 240         }
 241         std::ofstream outfile(fname.c_str());
 242         if (outfile.is_open())
 243         {
 244                 outfile << getpid();
 245                 outfile.close();
 246         }
 247         else
 248         {
 249                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 250                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 251                 Exit(EXIT_STATUS_PID);
 252         }
 253 }
 254
 255 std::string InspIRCd::GetRevision()
 256 {
 257         return REVISION;
 258 }
 259
 260 InspIRCd::InspIRCd(int argc, char** argv)
 261         : 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)
 262 {
 263         int found_ports = 0;
 264         FailedPortList pl;
 265         int do_nofork = 0, do_debug = 0, do_nolog = 0;    /* flag variables */
 266         char c = 0;
 267
 268         modules.resize(255);
 269         factory.resize(255);
 270
 271         this->unregistered_count = 0;
 272
 273         this->clientlist = new user_hash();
 274         this->chanlist = new chan_hash();
 275
 276         this->Config = new ServerConfig(this);
 277
 278         this->Config->argv = argv;
 279         this->Config->argc = argc;
 280
 281         this->Config->opertypes.clear();
 282         this->Config->operclass.clear();
 283         this->SNO = new SnomaskManager(this);
 284         this->Start();
 285         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 286         this->time_delta = 0;
 287         this->next_call = this->TIME + 3;
 288         srand(this->TIME);
 289
 290         if (!ServerConfig::FileExists(CONFIG_FILE))
 291         {
 292                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 293                 this->Log(DEFAULT,"main: no config");
 294                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 295                 Exit(EXIT_STATUS_CONFIG);
 296         }
 297
 298         *this->LogFileName = 0;
 299
 300         struct option longopts[] =
 301         {
 302                 { "nofork",     no_argument,            &do_nofork,     1       },
 303                 { "logfile",    required_argument,      NULL,           'f'     },
 304                 { "debug",      no_argument,            &do_debug,      1       },
 305                 { "nolog",      no_argument,            &do_nolog,      1       },
 306                 { 0, 0, 0, 0 }
 307         };
 308
 309         while ((c = getopt_long_only(argc, argv, ":f:", longopts, NULL)) != -1)
 310         {
 311                 switch (c)
 312                 {
 313                         case 'f':
 314                                 /* Log filename was set */
 315                                 strlcpy(LogFileName, optarg, MAXBUF);
 316                                 printf("LOG: Setting logfile to %s\n", LogFileName);
 317                         break;
 318                         case 0:
 319                                 /* getopt_long_only() set an int variable, just keep going */
 320                         break;
 321                         default:
 322                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 323                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>]\n", argv[0]);
 324                                 Exit(EXIT_STATUS_ARGV);
 325                         break;
 326                 }
 327         }
 328
 329         /* Set the finished argument values */
 330         Config->nofork = do_nofork;
 331         Config->forcedebug = do_debug;
 332         Config->writelog = !do_nolog;
 333
 334         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 335
 336         this->OpenLog(argv, argc);
 337         this->stats = new serverstats();
 338         this->Parser = new CommandParser(this);
 339         this->Timers = new TimerManager();
 340         this->XLines = new XLineManager(this);
 341         Config->ClearStack();
 342         Config->Read(true, NULL);
 343         this->CheckRoot();
 344         this->Modes = new ModeParser(this);
 345         this->AddServerName(Config->ServerName);
 346         CheckDie();
 347         InitializeDisabledCommands(Config->DisabledCommands, this);
 348         stats->BoundPortCount = BindPorts(true, found_ports, pl);
 349
 350         for(int t = 0; t < 255; t++)
 351                 Config->global_implementation[t] = 0;
 352
 353         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 354
 355         printf("\n");
 356         this->SetSignals();
 357         if (!Config->nofork)
 358         {
 359                 if (!this->DaemonSeed())
 360                 {
 361                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 362                         Exit(EXIT_STATUS_FORK);
 363                 }
 364         }
 365
 366         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 367          * initialize the socket engine.
 368          */
 369         SocketEngineFactory* SEF = new SocketEngineFactory();
 370         SE = SEF->Create(this);
 371         delete SEF;
 372
 373         this->Res = new DNS(this);
 374
 375         this->LoadAllModules();
 376         /* Just in case no modules were loaded - fix for bug #101 */
 377         this->BuildISupport();
 378
 379         if ((stats->BoundPortCount == 0) && (found_ports > 0))
 380         {
 381                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 382                 Exit(EXIT_STATUS_BIND);
 383         }
 384
 385         if (stats->BoundPortCount != (unsigned int)found_ports)
 386         {
 387                 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);
 388                 printf("The following port%s failed to bind:\n", found_ports - stats->BoundPortCount != 1 ? "s" : "");
 389                 int j = 1;
 390                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 391                 {
 392                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 393                 }
 394         }
 395
 396         /* Add the listening sockets used for client inbound connections
 397          * to the socket engine
 398          */
 399         this->Log(DEBUG,"%d listeners",stats->BoundPortCount);
 400         for (unsigned long count = 0; count < stats->BoundPortCount; count++)
 401         {
 402                 this->Log(DEBUG,"Add listener: %d",Config->openSockfd[count]->GetFd());
 403                 if (!SE->AddFd(Config->openSockfd[count]))
 404                 {
 405                         printf("\nEH? Could not add listener to socketengine. You screwed up, aborting.\n");
 406                         Exit(EXIT_STATUS_INTERNAL);
 407                 }
 408         }
 409
 410         if (!Config->nofork)
 411         {
 412                 if (kill(getppid(), SIGTERM) == -1)
 413                         printf("Error killing parent process: %s\n",strerror(errno));
 414                 fclose(stdin);
 415                 fclose(stderr);
 416                 fclose(stdout);
 417         }
 418
 419         printf("\nInspIRCd is now running!\n");
 420
 421         this->WritePID(Config->PID);
 422 }
 423
 424 std::string InspIRCd::GetVersionString()
 425 {
 426         char versiondata[MAXBUF];
 427         char dnsengine[] = "singlethread-object";
 428         if (*Config->CustomVersion)
 429         {
 430                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 431         }
 432         else
 433         {
 434                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%lu,%s,%s]",VERSION,Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 435         }
 436         return versiondata;
 437 }
 438
 439 char* InspIRCd::ModuleError()
 440 {
 441         return MODERR;
 442 }
 443
 444 void InspIRCd::EraseFactory(int j)
 445 {
 446         int v = 0;
 447         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 448         {
 449                 if (v == j)
 450                 {
 451                         delete *t;
 452                         factory.erase(t);
 453                         factory.push_back(NULL);
 454                         return;
 455                 }
 456                 v++;
 457         }
 458 }
 459
 460 void InspIRCd::EraseModule(int j)
 461 {
 462         int v1 = 0;
 463         for (ModuleList::iterator m = modules.begin(); m!= modules.end(); m++)
 464         {
 465                 if (v1 == j)
 466                 {
 467                         DELETE(*m);
 468                         modules.erase(m);
 469                         modules.push_back(NULL);
 470                         break;
 471                 }
 472                 v1++;
 473         }
 474         int v2 = 0;
 475         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 476         {
 477                 if (v2 == j)
 478                 {
 479                        Config->module_names.erase(v);
 480                        break;
 481                 }
 482                 v2++;
 483         }
 484
 485 }
 486
 487 void InspIRCd::MoveTo(std::string modulename,int slot)
 488 {
 489         unsigned int v2 = 256;
 490         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 491         {
 492                 if (Config->module_names[v] == modulename)
 493                 {
 494                         // found an instance, swap it with the item at the end
 495                         v2 = v;
 496                         break;
 497                 }
 498         }
 499         if ((v2 != (unsigned int)slot) && (v2 < 256))
 500         {
 501                 // Swap the module names over
 502                 Config->module_names[v2] = Config->module_names[slot];
 503                 Config->module_names[slot] = modulename;
 504                 // now swap the module factories
 505                 ircd_module* temp = factory[v2];
 506                 factory[v2] = factory[slot];
 507                 factory[slot] = temp;
 508                 // now swap the module objects
 509                 Module* temp_module = modules[v2];
 510                 modules[v2] = modules[slot];
 511                 modules[slot] = temp_module;
 512                 // now swap the implement lists (we dont
 513                 // need to swap the global or recount it)
 514                 for (int n = 0; n < 255; n++)
 515                 {
 516                         char x = Config->implement_lists[v2][n];
 517                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 518                         Config->implement_lists[slot][n] = x;
 519                 }
 520         }
 521         else
 522         {
 523                 this->Log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 524         }
 525 }
 526
 527 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 528 {
 529         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 530         {
 531                 if (Config->module_names[v] == after)
 532                 {
 533                         MoveTo(modulename, v);
 534                         return;
 535                 }
 536         }
 537 }
 538
 539 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 540 {
 541         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 542         {
 543                 if (Config->module_names[v] == before)
 544                 {
 545                         if (v > 0)
 546                         {
 547                                 MoveTo(modulename, v-1);
 548                         }
 549                         else
 550                         {
 551                                 MoveTo(modulename, v);
 552                         }
 553                         return;
 554                 }
 555         }
 556 }
 557
 558 void InspIRCd::MoveToFirst(std::string modulename)
 559 {
 560         MoveTo(modulename,0);
 561 }
 562
 563 void InspIRCd::MoveToLast(std::string modulename)
 564 {
 565         MoveTo(modulename,this->GetModuleCount());
 566 }
 567
 568 void InspIRCd::BuildISupport()
 569 {
 570         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 571         std::stringstream v;
 572         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 573         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 574         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32";
 575         Config->data005 = v.str();
 576         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 577         Config->Update005();
 578 }
 579
 580 bool InspIRCd::UnloadModule(const char* filename)
 581 {
 582         std::string filename_str = filename;
 583         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 584         {
 585                 if (Config->module_names[j] == filename_str)
 586                 {
 587                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 588                         {
 589                                 this->Log(DEFAULT,"Failed to unload STATIC module %s",filename);
 590                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 591                                 return false;
 592                         }
 593                         std::pair<int,std::string> intercount = GetInterfaceInstanceCount(modules[j]);
 594                         if (intercount.first > 0)
 595                         {
 596                                 this->Log(DEFAULT,"Failed to unload module %s, being used by %d other(s) via interface '%s'",filename, intercount.first, intercount.second.c_str());
 597                                 snprintf(MODERR,MAXBUF,"Module not unloadable (Still in use by %d other module%s which %s using its interface '%s') -- unload dependent modules first!",
 598                                                 intercount.first,
 599                                                 intercount.first > 1 ? "s" : "",
 600                                                 intercount.first > 1 ? "are" : "is",
 601                                                 intercount.second.c_str());
 602                                 return false;
 603                         }
 604                         /* Give the module a chance to tidy out all its metadata */
 605                         for (chan_hash::iterator c = this->chanlist->begin(); c != this->chanlist->end(); c++)
 606                         {
 607                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 608                         }
 609                         for (user_hash::iterator u = this->clientlist->begin(); u != this->clientlist->end(); u++)
 610                         {
 611                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 612                         }
 613
 614                         /* Tidy up any dangling resolvers */
 615                         this->Res->CleanResolvers(modules[j]);
 616
 617                         FOREACH_MOD_I(this,I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 618
 619                         for(int t = 0; t < 255; t++)
 620                         {
 621                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 622                         }
 623
 624                         /* We have to renumber implement_lists after unload because the module numbers change!
 625                          */
 626                         for(int j2 = j; j2 < 254; j2++)
 627                         {
 628                                 for(int t = 0; t < 255; t++)
 629                                 {
 630                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 631                                 }
 632                         }
 633
 634                         // found the module
 635                         Parser->RemoveCommands(filename);
 636                         this->EraseModule(j);
 637                         this->EraseFactory(j);
 638                         this->Log(DEFAULT,"Module %s unloaded",filename);
 639                         this->ModCount--;
 640                         BuildISupport();
 641                         return true;
 642                 }
 643         }
 644         this->Log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 645         snprintf(MODERR,MAXBUF,"Module not loaded");
 646         return false;
 647 }
 648
 649 bool InspIRCd::LoadModule(const char* filename)
 650 {
 651         /* Do we have a glob pattern in the filename?
 652          * The user wants to load multiple modules which
 653          * match the pattern.
 654          */
 655         if (strchr(filename,'*') || (strchr(filename,'?')))
 656         {
 657                 int n_match = 0;
 658                 DIR* library = opendir(Config->ModPath);
 659                 if (library)
 660                 {
 661                         /* Try and locate and load all modules matching the pattern */
 662                         dirent* entry = NULL;
 663                         while ((entry = readdir(library)))
 664                         {
 665                                 if (this->MatchText(entry->d_name, filename))
 666                                 {
 667                                         if (!this->LoadModule(entry->d_name))
 668                                                 n_match++;
 669                                 }
 670                         }
 671                         closedir(library);
 672                 }
 673                 /* Loadmodule will now return false if any one of the modules failed
 674                  * to load (but wont abort when it encounters a bad one) and when 1 or
 675                  * more modules were actually loaded.
 676                  */
 677                 return (n_match > 0);
 678         }
 679
 680         char modfile[MAXBUF];
 681         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 682         std::string filename_str = filename;
 683
 684         if (!ServerConfig::DirValid(modfile))
 685         {
 686                 this->Log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 687                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 688                 return false;
 689         }
 690         this->Log(DEBUG,"Loading module: %s",modfile);
 691
 692         if (ServerConfig::FileExists(modfile))
 693         {
 694
 695                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 696                 {
 697                         if (Config->module_names[j] == filename_str)
 698                         {
 699                                 this->Log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 700                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 701                                 return false;
 702                         }
 703                 }
 704                 try
 705                 {
 706                         ircd_module* a = new ircd_module(this, modfile);
 707                         factory[this->ModCount+1] = a;
 708                         if (factory[this->ModCount+1]->LastError())
 709                         {
 710                                 this->Log(DEFAULT,"Unable to load %s: %s",modfile,factory[this->ModCount+1]->LastError());
 711                                 snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[this->ModCount+1]->LastError());
 712                                 return false;
 713                         }
 714                         if ((long)factory[this->ModCount+1]->factory != -1)
 715                         {
 716                                 Module* m = factory[this->ModCount+1]->factory->CreateModule(this);
 717
 718                                 Version v = m->GetVersion();
 719
 720                                 if (v.API != API_VERSION)
 721                                 {
 722                                         delete m;
 723                                         delete a;
 724                                         this->Log(DEFAULT,"Unable to load %s: Incorrect module API version: %d (our version: %d)",modfile,v.API,API_VERSION);
 725                                         snprintf(MODERR,MAXBUF,"Loader/Linker error: Incorrect module API version: %d (our version: %d)",v.API,API_VERSION);
 726                                         return false;
 727                                 }
 728                                 else
 729                                 {
 730                                         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]"));
 731                                 }
 732
 733                                 modules[this->ModCount+1] = m;
 734                                 /* save the module and the module's classfactory, if
 735                                  * this isnt done, random crashes can occur :/ */
 736                                 Config->module_names.push_back(filename);
 737
 738                                 char* x = &Config->implement_lists[this->ModCount+1][0];
 739                                 for(int t = 0; t < 255; t++)
 740                                         x[t] = 0;
 741
 742                                 modules[this->ModCount+1]->Implements(x);
 743
 744                                 for(int t = 0; t < 255; t++)
 745                                         Config->global_implementation[t] += Config->implement_lists[this->ModCount+1][t];
 746                         }
 747                         else
 748                         {
 749                                 this->Log(DEFAULT,"Unable to load %s",modfile);
 750                                 snprintf(MODERR,MAXBUF,"Factory function failed: Probably missing init_module() entrypoint.");
 751                                 return false;
 752                         }
 753                 }
 754                 catch (CoreException& modexcept)
 755                 {
 756                         this->Log(DEFAULT,"Unable to load %s: ",modfile,modexcept.GetReason());
 757                         snprintf(MODERR,MAXBUF,"Factory function of %s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 758                         return false;
 759                 }
 760         }
 761         else
 762         {
 763                 this->Log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 764                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 765                 return false;
 766         }
 767         this->ModCount++;
 768         FOREACH_MOD_I(this,I_OnLoadModule,OnLoadModule(modules[this->ModCount],filename_str));
 769         // now work out which modules, if any, want to move to the back of the queue,
 770         // and if they do, move them there.
 771         std::vector<std::string> put_to_back;
 772         std::vector<std::string> put_to_front;
 773         std::map<std::string,std::string> put_before;
 774         std::map<std::string,std::string> put_after;
 775         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 776         {
 777                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 778                         put_to_back.push_back(Config->module_names[j]);
 779                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 780                         put_to_front.push_back(Config->module_names[j]);
 781                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 782                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 783                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 784                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 785         }
 786         for (unsigned int j = 0; j < put_to_back.size(); j++)
 787                 MoveToLast(put_to_back[j]);
 788         for (unsigned int j = 0; j < put_to_front.size(); j++)
 789                 MoveToFirst(put_to_front[j]);
 790         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 791                 MoveBefore(j->first,j->second);
 792         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 793                 MoveAfter(j->first,j->second);
 794         BuildISupport();
 795         return true;
 796 }
 797
 798 void InspIRCd::DoOneIteration(bool process_module_sockets)
 799 {
 800         static rusage ru;
 801
 802         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 803          * Once per loop iteration is pleanty.
 804          */
 805         OLDTIME = TIME;
 806         TIME = time(NULL);
 807
 808         /* Run background module timers every few seconds
 809          * (the docs say modules shouldnt rely on accurate
 810          * timing using this event, so we dont have to
 811          * time this exactly).
 812          */
 813         if (TIME != OLDTIME)
 814         {
 815                 if (TIME < OLDTIME)
 816                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 817                 if ((TIME % 3600) == 0)
 818                 {
 819                         irc::whowas::MaintainWhoWas(this, TIME);
 820                         this->RehashUsersAndChans();
 821                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
 822                 }
 823                 Timers->TickTimers(TIME);
 824                 this->DoBackgroundUserStuff(TIME);
 825
 826                 if ((TIME % 5) == 0)
 827                 {
 828                         XLines->expire_lines();
 829                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 830                         Timers->TickMissedTimers(TIME);
 831                 }
 832
 833                 if (!getrusage(0, &ru))
 834                 {
 835                         gettimeofday(&this->stats->LastSampled, NULL);
 836                         this->stats->LastCPU = ru.ru_utime;
 837                 }
 838         }
 839
 840         /* Call the socket engine to wait on the active
 841          * file descriptors. The socket engine has everything's
 842          * descriptors in its list... dns, modules, users,
 843          * servers... so its nice and easy, just one call.
 844          * This will cause any read or write events to be
 845          * dispatched to their handlers.
 846          */
 847         SE->DispatchEvents();
 848 }
 849
 850 bool InspIRCd::IsIdent(const char* n)
 851 {
 852         if (!n || !*n)
 853                 return false;
 854
 855         for (char* i = (char*)n; *i; i++)
 856         {
 857                 if ((*i >= 'A') && (*i <= '}'))
 858                 {
 859                         continue;
 860                 }
 861                 if (((*i >= '0') && (*i <= '9')) || (*i == '-') || (*i == '.'))
 862                 {
 863                         continue;
 864                 }
 865                 return false;
 866         }
 867         return true;
 868 }
 869
 870
 871 int InspIRCd::Run()
 872 {
 873         while (true)
 874         {
 875                 DoOneIteration(true);
 876         }
 877         /* This is never reached -- we hope! */
 878         return 0;
 879 }
 880
 881 /**********************************************************************************/
 882
 883 /**
 884  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 885  */
 886
 887 int main(int argc, char** argv)
 888 {
 889         SI = new InspIRCd(argc, argv);
 890         SI->Run();
 891         delete SI;
 892         return 0;
 893 }
 894
 895 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 896  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 897  * registration timeout maximum seconds)
 898  */
 899 bool InspIRCd::AllModulesReportReady(userrec* user)
 900 {
 901         if (!Config->global_implementation[I_OnCheckReady])
 902                 return true;
 903
 904         for (int i = 0; i <= this->GetModuleCount(); i++)
 905         {
 906                 if (Config->implement_lists[i][I_OnCheckReady])
 907                 {
 908                         int res = modules[i]->OnCheckReady(user);
 909                         if (!res)
 910                                 return false;
 911                 }
 912         }
 913         return true;
 914 }
 915
 916 int InspIRCd::GetModuleCount()
 917 {
 918         return this->ModCount;
 919 }
 920
 921 time_t InspIRCd::Time(bool delta)
 922 {
 923         if (delta)
 924                 return TIME + time_delta;
 925         return TIME;
 926 }
 927
 928 int InspIRCd::SetTimeDelta(int delta)
 929 {
 930         int old = time_delta;
 931         time_delta += delta;
 932         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 933         return old;
 934 }
 935
 936 void InspIRCd::AddLocalClone(userrec* user)
 937 {
 938         clonemap::iterator x = local_clones.find(user->GetIPString());
 939         if (x != local_clones.end())
 940                 x->second++;
 941         else
 942                 local_clones[user->GetIPString()] = 1;
 943 }
 944
 945 void InspIRCd::AddGlobalClone(userrec* user)
 946 {
 947         clonemap::iterator y = global_clones.find(user->GetIPString());
 948         if (y != global_clones.end())
 949                 y->second++;
 950         else
 951                 global_clones[user->GetIPString()] = 1;
 952 }
 953
 954 int InspIRCd::GetTimeDelta()
 955 {
 956         return time_delta;
 957 }
 958
 959 bool FileLogger::Readable()
 960 {
 961         return false;
 962 }
 963
 964 void FileLogger::HandleEvent(EventType et, int errornum)
 965 {
 966         this->WriteLogLine("");
 967         if (log)
 968                 ServerInstance->SE->DelFd(this);
 969 }
 970
 971 void FileLogger::WriteLogLine(const std::string &line)
 972 {
 973         if (line.length())
 974                 buffer.append(line);
 975
 976         if (log)
 977         {
 978                 int written = fprintf(log,"%s",buffer.c_str());
 979                 if ((written >= 0) && (written < (int)buffer.length()))
 980                 {
 981                         buffer.erase(0, buffer.length());
 982                         ServerInstance->SE->AddFd(this);
 983                 }
 984                 else if (written == -1)
 985                 {
 986                         if (errno == EAGAIN)
 987                                 ServerInstance->SE->AddFd(this);
 988                 }
 989                 else
 990                 {
 991                         /* Wrote the whole buffer, and no need for write callback */
 992                         buffer = "";
 993                 }
 994         }
 995         if (writeops++ % 20)
 996         {
 997                 fflush(log);
 998         }
 999 }
1000
1001 void FileLogger::Close()
1002 {
1003         if (log)
1004         {
1005                 int flags = fcntl(fileno(log), F_GETFL, 0);
1006                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
1007                 if (buffer.size())
1008                         fprintf(log,"%s",buffer.c_str());
1009
1010                 ServerInstance->SE->DelFd(this);
1011
1012                 fflush(log);
1013                 fclose(log);
1014         }
1015
1016         buffer = "";
1017 }
1018
1019 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
1020 {
1021         if (log)
1022         {
1023                 irc::sockets::NonBlocking(fileno(log));
1024                 this->SetFd(fileno(log));
1025                 buffer = "";
1026         }
1027 }
1028
1029 FileLogger::~FileLogger()
1030 {
1031         this->Close();
1032 }
1033