src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <sys/errno.h>
  27 #include <sys/ioctl.h>
  28 #include <sys/utsname.h>
  29 #include <time.h>
  30 #include <string>
  31 #ifdef GCC3
  32 #include <ext/hash_map>
  33 #else
  34 #include <hash_map>
  35 #endif
  36 #include <map>
  37 #include <sstream>
  38 #include <vector>
  39 #include <deque>
  40 #ifdef THREADED_DNS
  41 #include <pthread.h>
  42 #endif
  43 #include "users.h"
  44 #include "ctables.h"
  45 #include "globals.h"
  46 #include "modules.h"
  47 #include "dynamic.h"
  48 #include "wildcard.h"
  49 #include "message.h"
  50 #include "mode.h"
  51 #include "commands.h"
  52 #include "xline.h"
  53 #include "inspstring.h"
  54 #include "dnsqueue.h"
  55 #include "helperfuncs.h"
  56 #include "hashcomp.h"
  57 #include "socketengine.h"
  58 #include "userprocess.h"
  59 #include "socket.h"
  60 #include "typedefs.h"
  61 #include "command_parse.h"
  62
  63 InspIRCd* ServerInstance;
  64
  65 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  66 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  67
  68 extern std::vector<Module*> modules;
  69 extern std::vector<ircd_module*> factory;
  70
  71 std::vector<InspSocket*> module_sockets;
  72 std::vector<userrec*> local_users;
  73
  74 extern int MODCOUNT;
  75 int openSockfd[MAXSOCKS];
  76 sockaddr_in client,server;
  77 socklen_t length;
  78
  79 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  80
  81 time_t TIME = time(NULL), OLDTIME = time(NULL);
  82
  83 // This table references users by file descriptor.
  84 // its an array to make it VERY fast, as all lookups are referenced
  85 // by an integer, meaning there is no need for a scan/search operation.
  86 userrec* fd_ref_table[MAX_DESCRIPTORS];
  87
  88 Server* MyServer = new Server;
  89 ServerConfig *Config = new ServerConfig;
  90
  91 user_hash clientlist;
  92 chan_hash chanlist;
  93 whowas_hash whowas;
  94 servernamelist servernames;
  95 char lowermap[255];
  96
  97 void AddServerName(std::string servername)
  98 {
  99         log(DEBUG,"Adding server name: %s",servername.c_str());
 100         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 101         {
 102                 if (*a == servername)
 103                         return;
 104         }
 105         servernames.push_back(servername);
 106 }
 107
 108 const char* FindServerNamePtr(std::string servername)
 109 {
 110         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 111         {
 112                 if (*a == servername)
 113                         return a->c_str();
 114         }
 115         AddServerName(servername);
 116         return FindServerNamePtr(servername);
 117 }
 118
 119 std::string InspIRCd::GetRevision()
 120 {
 121         /* w00t got me to replace a bunch of strtok_r
 122          * with something nicer, so i did this. Its the
 123          * same thing really, only in C++. It places the
 124          * text into a std::stringstream which is a readable
 125          * and writeable buffer stream, and then pops two
 126          * words off it, space delimited. Because it reads
 127          * into the same variable twice, the first word
 128          * is discarded, and the second one returned.
 129          */
 130         std::stringstream Revision("$Revision$");
 131         std::string single;
 132         Revision >> single >> single;
 133         return single;
 134 }
 135
 136 void InspIRCd::MakeLowerMap()
 137 {
 138         // initialize the lowercase mapping table
 139         for (unsigned int cn = 0; cn < 256; cn++)
 140                 lowermap[cn] = cn;
 141         // lowercase the uppercase chars
 142         for (unsigned int cn = 65; cn < 91; cn++)
 143                 lowermap[cn] = tolower(cn);
 144         // now replace the specific chars for scandanavian comparison
 145         lowermap[(unsigned)'['] = '{';
 146         lowermap[(unsigned)']'] = '}';
 147         lowermap[(unsigned)'\\'] = '|';
 148 }
 149
 150 InspIRCd::InspIRCd(int argc, char** argv)
 151 {
 152         Start();
 153         module_sockets.clear();
 154         this->startup_time = time(NULL);
 155         srand(time(NULL));
 156         log(DEBUG,"*** InspIRCd starting up!");
 157         if (!FileExists(CONFIG_FILE))
 158         {
 159                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 160                 log(DEFAULT,"main: no config");
 161                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 162                 Exit(ERROR);
 163         }
 164         if (argc > 1) {
 165                 for (int i = 1; i < argc; i++)
 166                 {
 167                         if (!strcmp(argv[i],"-nofork")) {
 168                                 Config->nofork = true;
 169                         }
 170                         if (!strcmp(argv[i],"-wait")) {
 171                                 sleep(6);
 172                         }
 173                         if (!strcmp(argv[i],"-nolimit")) {
 174                                 Config->unlimitcore = true;
 175                         }
 176                 }
 177         }
 178
 179         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 180
 181         this->MakeLowerMap();
 182
 183         OpenLog(argv, argc);
 184         Config->ClearStack();
 185         Config->Read(true,NULL);
 186         CheckRoot();
 187         this->ModeGrok = new ModeParser();
 188         this->Parser = new CommandParser();
 189         this->stats = new serverstats();
 190         AddServerName(Config->ServerName);
 191         CheckDie();
 192         stats->BoundPortCount = BindPorts();
 193
 194         for(int t = 0; t < 255; t++)
 195                 Config->global_implementation[t] = 0;
 196
 197         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 198
 199         printf("\n");
 200         SetSignals();
 201         if (!Config->nofork)
 202         {
 203                 if (DaemonSeed() == ERROR)
 204                 {
 205                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 206                         Exit(ERROR);
 207                 }
 208         }
 209
 210         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 211          * initialize the socket engine.
 212          */
 213         SE = new SocketEngine();
 214
 215         /* We must load the modules AFTER initializing the socket engine, now */
 216
 217         return;
 218 }
 219
 220 std::string InspIRCd::GetVersionString()
 221 {
 222         char versiondata[MAXBUF];
 223 #ifdef THREADED_DNS
 224         char dnsengine[] = "multithread";
 225 #else
 226         char dnsengine[] = "singlethread";
 227 #endif
 228         if (*Config->CustomVersion)
 229         {
 230                 snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s",VERSION,GetRevision().c_str(),Config->ServerName,Config->CustomVersion);
 231         }
 232         else
 233         {
 234                 snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s [FLAGS=%lu,%s,%s]",VERSION,GetRevision().c_str(),Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 235         }
 236         return versiondata;
 237 }
 238
 239 char* InspIRCd::ModuleError()
 240 {
 241         return MODERR;
 242 }
 243
 244 void InspIRCd::erase_factory(int j)
 245 {
 246         int v = 0;
 247         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
 248         {
 249                 if (v == j)
 250                 {
 251                         factory.erase(t);
 252                         factory.push_back(NULL);
 253                         return;
 254                 }
 255                 v++;
 256         }
 257 }
 258
 259 void InspIRCd::erase_module(int j)
 260 {
 261         int v1 = 0;
 262         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
 263         {
 264                 if (v1 == j)
 265                 {
 266                         delete *m;
 267                         modules.erase(m);
 268                         modules.push_back(NULL);
 269                         break;
 270                 }
 271                 v1++;
 272         }
 273         int v2 = 0;
 274         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
 275         {
 276                 if (v2 == j)
 277                 {
 278                        Config->module_names.erase(v);
 279                        break;
 280                 }
 281                 v2++;
 282         }
 283
 284 }
 285
 286 void InspIRCd::MoveTo(std::string modulename,int slot)
 287 {
 288         unsigned int v2 = 256;
 289         log(DEBUG,"Moving %s to slot %d",modulename.c_str(),slot);
 290         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 291         {
 292                 if (Config->module_names[v] == modulename)
 293                 {
 294                         // found an instance, swap it with the item at MODCOUNT
 295                         v2 = v;
 296                         break;
 297                 }
 298         }
 299         if (v2 == (unsigned int)slot)
 300         {
 301                 log(DEBUG,"Item %s already in slot %d!",modulename.c_str(),slot);
 302         }
 303         else if (v2 < 256)
 304         {
 305                 // Swap the module names over
 306                 Config->module_names[v2] = Config->module_names[slot];
 307                 Config->module_names[slot] = modulename;
 308                 // now swap the module factories
 309                 ircd_module* temp = factory[v2];
 310                 factory[v2] = factory[slot];
 311                 factory[slot] = temp;
 312                 // now swap the module objects
 313                 Module* temp_module = modules[v2];
 314                 modules[v2] = modules[slot];
 315                 modules[slot] = temp_module;
 316                 // now swap the implement lists (we dont
 317                 // need to swap the global or recount it)
 318                 for (int n = 0; n < 255; n++)
 319                 {
 320                         char x = Config->implement_lists[v2][n];
 321                         Config->implement_lists[v2][n] = Config->implement_lists[slot][n];
 322                         Config->implement_lists[slot][n] = x;
 323                 }
 324                 log(DEBUG,"Moved %s to slot successfully",modulename.c_str());
 325         }
 326         else
 327         {
 328                 log(DEBUG,"Move of %s to slot failed!",modulename.c_str());
 329         }
 330 }
 331
 332 void InspIRCd::MoveAfter(std::string modulename, std::string after)
 333 {
 334         log(DEBUG,"Move %s after %s...",modulename.c_str(),after.c_str());
 335         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 336         {
 337                 if (Config->module_names[v] == after)
 338                 {
 339                         MoveTo(modulename, v);
 340                         return;
 341                 }
 342         }
 343 }
 344
 345 void InspIRCd::MoveBefore(std::string modulename, std::string before)
 346 {
 347         log(DEBUG,"Move %s before %s...",modulename.c_str(),before.c_str());
 348         for (unsigned int v = 0; v < Config->module_names.size(); v++)
 349         {
 350                 if (Config->module_names[v] == before)
 351                 {
 352                         if (v > 0)
 353                         {
 354                                 MoveTo(modulename, v-1);
 355                         }
 356                         else
 357                         {
 358                                 MoveTo(modulename, v);
 359                         }
 360                         return;
 361                 }
 362         }
 363 }
 364
 365 void InspIRCd::MoveToFirst(std::string modulename)
 366 {
 367         MoveTo(modulename,0);
 368 }
 369
 370 void InspIRCd::MoveToLast(std::string modulename)
 371 {
 372         MoveTo(modulename,MODCOUNT);
 373 }
 374
 375 void InspIRCd::BuildISupport()
 376 {
 377         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 378         std::stringstream v;
 379         v << "WALLCHOPS MODES=" << MAXMODES << " CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS << " MAXBANS=60 NICKLEN=" << NICKMAX-1;
 380         v << " CASEMAPPING=rfc1459 STATUSMSG=@+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 381         v << MAXAWAY << " CHANMODES=b,k,l,psmnti NETWORK=" << Config->Network;
 382         Config->data005 = v.str();
 383         FOREACH_MOD(I_On005Numeric,On005Numeric(Config->data005));
 384 }
 385
 386 bool InspIRCd::UnloadModule(const char* filename)
 387 {
 388         std::string filename_str = filename;
 389         for (unsigned int j = 0; j != Config->module_names.size(); j++)
 390         {
 391                 if (Config->module_names[j] == filename_str)
 392                 {
 393                         if (modules[j]->GetVersion().Flags & VF_STATIC)
 394                         {
 395                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
 396                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
 397                                 return false;
 398                         }
 399                         /* Give the module a chance to tidy out all its metadata */
 400                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
 401                         {
 402                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
 403                         }
 404                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 405                         {
 406                                 modules[j]->OnCleanup(TYPE_USER,u->second);
 407                         }
 408
 409                         FOREACH_MOD(I_OnUnloadModule,OnUnloadModule(modules[j],Config->module_names[j]));
 410
 411                         for(int t = 0; t < 255; t++)
 412                         {
 413                                 Config->global_implementation[t] -= Config->implement_lists[j][t];
 414                         }
 415
 416                         /* We have to renumber implement_lists after unload because the module numbers change!
 417                          */
 418                         for(int j2 = j; j2 < 254; j2++)
 419                         {
 420                                 for(int t = 0; t < 255; t++)
 421                                 {
 422                                         Config->implement_lists[j2][t] = Config->implement_lists[j2+1][t];
 423                                 }
 424                         }
 425
 426                         // found the module
 427                         log(DEBUG,"Deleting module...");
 428                         erase_module(j);
 429                         log(DEBUG,"Erasing module entry...");
 430                         erase_factory(j);
 431                         log(DEBUG,"Removing dependent commands...");
 432                         Parser->RemoveCommands(filename);
 433                         log(DEFAULT,"Module %s unloaded",filename);
 434                         MODCOUNT--;
 435                         BuildISupport();
 436                         return true;
 437                 }
 438         }
 439         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
 440         snprintf(MODERR,MAXBUF,"Module not loaded");
 441         return false;
 442 }
 443
 444 bool InspIRCd::LoadModule(const char* filename)
 445 {
 446         char modfile[MAXBUF];
 447 #ifdef STATIC_LINK
 448         strlcpy(modfile,filename,MAXBUF);
 449 #else
 450         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
 451 #endif
 452         std::string filename_str = filename;
 453 #ifndef STATIC_LINK
 454         if (!DirValid(modfile))
 455         {
 456                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
 457                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
 458                 return false;
 459         }
 460 #endif
 461         log(DEBUG,"Loading module: %s",modfile);
 462 #ifndef STATIC_LINK
 463         if (FileExists(modfile))
 464         {
 465 #endif
 466                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
 467                 {
 468                         if (Config->module_names[j] == filename_str)
 469                         {
 470                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
 471                                 snprintf(MODERR,MAXBUF,"Module already loaded");
 472                                 return false;
 473                         }
 474                 }
 475                 ircd_module* a = new ircd_module(modfile);
 476                 factory[MODCOUNT+1] = a;
 477                 if (factory[MODCOUNT+1]->LastError())
 478                 {
 479                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
 480                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
 481                         MODCOUNT--;
 482                         return false;
 483                 }
 484                 if (factory[MODCOUNT+1]->factory)
 485                 {
 486                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
 487                         modules[MODCOUNT+1] = m;
 488                         /* save the module and the module's classfactory, if
 489                          * this isnt done, random crashes can occur :/ */
 490                         Config->module_names.push_back(filename);
 491
 492                         char* x = &Config->implement_lists[MODCOUNT+1][0];
 493                         for(int t = 0; t < 255; t++)
 494                                 x[t] = 0;
 495
 496                         modules[MODCOUNT+1]->Implements(x);
 497
 498                         for(int t = 0; t < 255; t++)
 499                         {
 500                                 Config->global_implementation[t] += Config->implement_lists[MODCOUNT+1][t];
 501                                 if (Config->implement_lists[MODCOUNT+1][t])
 502                                 {
 503                                         log(DEBUG,"Add global implementation: %d %d => %d",MODCOUNT+1,t,Config->global_implementation[t]);
 504                                 }
 505                         }
 506                 }
 507                 else
 508                 {
 509                         log(DEFAULT,"Unable to load %s",modfile);
 510                         snprintf(MODERR,MAXBUF,"Factory function failed!");
 511                         return false;
 512                 }
 513 #ifndef STATIC_LINK
 514         }
 515         else
 516         {
 517                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
 518                 snprintf(MODERR,MAXBUF,"Module file could not be found");
 519                 return false;
 520         }
 521 #endif
 522         MODCOUNT++;
 523         FOREACH_MOD(I_OnLoadModule,OnLoadModule(modules[MODCOUNT],filename_str));
 524         // now work out which modules, if any, want to move to the back of the queue,
 525         // and if they do, move them there.
 526         std::vector<std::string> put_to_back;
 527         std::vector<std::string> put_to_front;
 528         std::map<std::string,std::string> put_before;
 529         std::map<std::string,std::string> put_after;
 530         for (unsigned int j = 0; j < Config->module_names.size(); j++)
 531         {
 532                 if (modules[j]->Prioritize() == PRIORITY_LAST)
 533                 {
 534                         put_to_back.push_back(Config->module_names[j]);
 535                 }
 536                 else if (modules[j]->Prioritize() == PRIORITY_FIRST)
 537                 {
 538                         put_to_front.push_back(Config->module_names[j]);
 539                 }
 540                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_BEFORE)
 541                 {
 542                         log(DEBUG,"Module %d wants PRIORITY_BEFORE",j);
 543                         put_before[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 544                         log(DEBUG,"Before: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 545                 }
 546                 else if ((modules[j]->Prioritize() & 0xFF) == PRIORITY_AFTER)
 547                 {
 548                         log(DEBUG,"Module %d wants PRIORITY_AFTER",j);
 549                         put_after[Config->module_names[j]] = Config->module_names[modules[j]->Prioritize() >> 8];
 550                         log(DEBUG,"After: %s",Config->module_names[modules[j]->Prioritize() >> 8].c_str());
 551                 }
 552         }
 553         for (unsigned int j = 0; j < put_to_back.size(); j++)
 554         {
 555                 MoveToLast(put_to_back[j]);
 556         }
 557         for (unsigned int j = 0; j < put_to_front.size(); j++)
 558         {
 559                 MoveToFirst(put_to_front[j]);
 560         }
 561         for (std::map<std::string,std::string>::iterator j = put_before.begin(); j != put_before.end(); j++)
 562         {
 563                 MoveBefore(j->first,j->second);
 564         }
 565         for (std::map<std::string,std::string>::iterator j = put_after.begin(); j != put_after.end(); j++)
 566         {
 567                 MoveAfter(j->first,j->second);
 568         }
 569         BuildISupport();
 570         return true;
 571 }
 572
 573 int InspIRCd::Run()
 574 {
 575         bool expire_run = false;
 576         int activefds[MAX_DESCRIPTORS];
 577         int incomingSockfd;
 578         int in_port;
 579         userrec* cu = NULL;
 580         InspSocket* s = NULL;
 581         InspSocket* s_del = NULL;
 582         char* target;
 583         unsigned int numberactive;
 584         sockaddr_in sock_us;     // our port number
 585         socklen_t uslen;         // length of our port number
 586
 587         /* Until THIS point, ServerInstance == NULL */
 588
 589         LoadAllModules(this);
 590
 591         printf("\nInspIRCd is now running!\n");
 592
 593         if (!Config->nofork)
 594         {
 595                 freopen("/dev/null","w",stdout);
 596                 freopen("/dev/null","w",stderr);
 597         }
 598
 599         /* Add the listening sockets used for client inbound connections
 600          * to the socket engine
 601          */
 602         for (int count = 0; count < stats->BoundPortCount; count++)
 603                 SE->AddFd(openSockfd[count],true,X_LISTEN);
 604
 605         WritePID(Config->PID);
 606
 607         /* main loop, this never returns */
 608         for (;;)
 609         {
 610                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 611                  * Once per loop iteration is pleanty.
 612                  */
 613                 OLDTIME = TIME;
 614                 TIME = time(NULL);
 615
 616                 /* Run background module timers every few seconds
 617                  * (the docs say modules shouldnt rely on accurate
 618                  * timing using this event, so we dont have to
 619                  * time this exactly).
 620                  */
 621                 if (((TIME % 8) == 0) && (!expire_run))
 622                 {
 623                         expire_lines();
 624                         FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 625                         expire_run = true;
 626                         continue;
 627                 }
 628                 else if ((TIME % 8) == 1)
 629                 {
 630                         expire_run = false;
 631                 }
 632
 633                 /* Once a second, do the background processing */
 634                 if (TIME != OLDTIME)
 635                         DoBackgroundUserStuff(TIME);
 636
 637                 /* Call the socket engine to wait on the active
 638                  * file descriptors. The socket engine has everything's
 639                  * descriptors in its list... dns, modules, users,
 640                  * servers... so its nice and easy, just one call.
 641                  */
 642                 if (!(numberactive = SE->Wait(activefds)))
 643                         continue;
 644
 645                 /**
 646                  * Now process each of the fd's. For users, we have a fast
 647                  * lookup table which can find a user by file descriptor, so
 648                  * processing them by fd isnt expensive. If we have a lot of
 649                  * listening ports or module sockets though, things could get
 650                  * ugly.
 651                  */
 652                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
 653                 {
 654                         int socket_type = SE->GetType(activefds[activefd]);
 655                         switch (socket_type)
 656                         {
 657                                 case X_ESTAB_CLIENT:
 658
 659                                         cu = fd_ref_table[activefds[activefd]];
 660                                         if (cu)
 661                                                 ProcessUser(cu);
 662
 663                                 break;
 664
 665                                 case X_ESTAB_MODULE:
 666
 667                                         /* Process module-owned sockets.
 668                                          * Modules are encouraged to inherit their sockets from
 669                                          * InspSocket so we can process them neatly like this.
 670                                          */
 671                                         s = socket_ref[activefds[activefd]];
 672
 673                                         if ((s) && (!s->Poll()))
 674                                         {
 675                                                 log(DEBUG,"Socket poll returned false, close and bail");
 676                                                 SE->DelFd(s->GetFd());
 677                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 678                                                 {
 679                                                         s_del = (InspSocket*)*a;
 680                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
 681                                                         {
 682                                                                 module_sockets.erase(a);
 683                                                                 break;
 684                                                         }
 685                                                 }
 686                                                 s->Close();
 687                                                 delete s;
 688                                         }
 689
 690                                 break;
 691
 692                                 case X_ESTAB_DNS:
 693
 694                                         /* When we are using single-threaded dns,
 695                                          * the sockets for dns end up in our mainloop.
 696                                          * When we are using multi-threaded dns,
 697                                          * each thread has its own basic poll() loop
 698                                          * within it, making them 'fire and forget'
 699                                          * and independent of the mainloop.
 700                                          */
 701 #ifndef THREADED_DNS
 702                                         dns_poll(activefds[activefd]);
 703 #endif
 704                                 break;
 705
 706                                 case X_LISTEN:
 707
 708                                         /* It's a listener */
 709                                         uslen = sizeof(sock_us);
 710                                         length = sizeof(client);
 711                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
 712
 713                                         if ((incomingSockfd > -1) && (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)))
 714                                         {
 715                                                 in_port = ntohs(sock_us.sin_port);
 716                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
 717                                                 target = (char*)inet_ntoa(client.sin_addr);
 718                                                 /* Years and years ago, we used to resolve here
 719                                                  * using gethostbyaddr(). That is sucky and we
 720                                                  * don't do that any more...
 721                                                  */
 722                                                 NonBlocking(incomingSockfd);
 723                                                 if (Config->GetIOHook(in_port))
 724                                                 {
 725                                                         Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, target, in_port);
 726                                                 }
 727                                                 stats->statsAccept++;
 728                                                 AddClient(incomingSockfd, target, in_port, false, target);
 729                                                 log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
 730                                         }
 731                                         else
 732                                         {
 733                                                 log(DEBUG,"Accept failed on fd %lu: %s",(unsigned long)incomingSockfd,strerror(errno));
 734                                                 shutdown(incomingSockfd,2);
 735                                                 close(incomingSockfd);
 736                                                 stats->statsRefused++;
 737                                         }
 738                                 break;
 739
 740                                 default:
 741                                         /* Something went wrong if we're in here.
 742                                          * In fact, so wrong, im not quite sure
 743                                          * what we would do, so for now, its going
 744                                          * to safely do bugger all.
 745                                          */
 746                                 break;
 747                         }
 748                 }
 749
 750         }
 751         /* This is never reached -- we hope! */
 752         return 0;
 753 }
 754
 755 /**********************************************************************************/
 756
 757 /**
 758  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 759  */
 760
 761 int main(int argc, char** argv)
 762 {
 763         ServerInstance = new InspIRCd(argc, argv);
 764         ServerInstance->Run();
 765         delete ServerInstance;
 766         return 0;
 767 }
 768