src/usermanager.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *          the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core */
  15
  16 #include "inspircd.h"
  17 #include "xline.h"
  18 #include "bancache.h"
  19
  20 /* add a client connection to the sockets list */
  21 void UserManager::AddUser(InspIRCd* Instance, int socket, ClientListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
  22 {
  23         /* NOTE: Calling this one parameter constructor for User automatically
  24          * allocates a new UUID and places it in the hash_map.
  25          */
  26         User* New = NULL;
  27         try
  28         {
  29                 New = new User(Instance);
  30         }
  31         catch (...)
  32         {
  33                 Instance->Logs->Log("USERS", DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
  34                 Instance->SNO->WriteToSnoMask('a', "WARNING *** Duplicate UUID allocated!");
  35                 return;
  36         }
  37
  38         New->SetFd(socket);
  39         memcpy(&New->client_sa, client, sizeof(irc::sockets::sockaddrs));
  40         memcpy(&New->server_sa, server, sizeof(irc::sockets::sockaddrs));
  41
  42         /* Give each of the modules an attempt to hook the user for I/O */
  43         FOREACH_MOD_I(Instance, I_OnHookIO, OnHookIO(New, via));
  44
  45         if (New->GetIOHook())
  46         {
  47                 try
  48                 {
  49                         New->GetIOHook()->OnRawSocketAccept(socket, client, server);
  50                 }
  51                 catch (CoreException& modexcept)
  52                 {
  53                         ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  54                 }
  55         }
  56
  57         Instance->Logs->Log("USERS", DEBUG,"New user fd: %d", socket);
  58
  59         this->unregistered_count++;
  60
  61         (*(this->clientlist))[New->uuid] = New;
  62
  63         /* The users default nick is their UUID */
  64         New->nick.assign(New->uuid, 0, ServerInstance->Config->Limits.NickMax);
  65
  66         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
  67         New->ident.assign("unknown");
  68
  69         New->registered = REG_NONE;
  70         New->signon = Instance->Time() + Instance->Config->dns_timeout;
  71         New->lastping = 1;
  72
  73         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
  74         New->dhost.assign(New->GetIPString(), 0, 64);
  75         New->host.assign(New->GetIPString(), 0, 64);
  76
  77         Instance->Users->AddLocalClone(New);
  78         Instance->Users->AddGlobalClone(New);
  79
  80         /*
  81          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  82          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  83          */
  84         ConnectClass* i = New->SetClass();
  85
  86         if (!i)
  87         {
  88                 this->QuitUser(New, "Access denied by configuration");
  89                 return;
  90         }
  91
  92         /*
  93          * Check connect class settings and initialise settings into User.
  94          * This will be done again after DNS resolution. -- w00t
  95          */
  96         New->CheckClass();
  97
  98         this->local_users.push_back(New);
  99
 100         if ((this->local_users.size() > Instance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)Instance->SE->GetMaxFds()))
 101         {
 102                 Instance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 103                 this->QuitUser(New,"No more connections allowed");
 104                 return;
 105         }
 106
 107         /*
 108          * even with bancache, we still have to keep User::exempt current.
 109          * besides that, if we get a positive bancache hit, we still won't fuck
 110          * them over if they are exempt. -- w00t
 111          */
 112         New->exempt = (Instance->XLines->MatchesLine("E",New) != NULL);
 113
 114         if (BanCacheHit *b = Instance->BanCache->GetHit(New->GetIPString()))
 115         {
 116                 if (!b->Type.empty() && !New->exempt)
 117                 {
 118                         /* user banned */
 119                         Instance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 120                         if (*Instance->Config->MoronBanner)
 121                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), Instance->Config->MoronBanner);
 122                         this->QuitUser(New, b->Reason);
 123                         return;
 124                 }
 125                 else
 126                 {
 127                         Instance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 128                 }
 129         }
 130         else
 131         {
 132                 if (!New->exempt)
 133                 {
 134                         XLine* r = Instance->XLines->MatchesLine("Z",New);
 135
 136                         if (r)
 137                         {
 138                                 r->Apply(New);
 139                                 return;
 140                         }
 141                 }
 142         }
 143
 144         if (!Instance->SE->AddFd(New))
 145         {
 146                 Instance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 147                 this->QuitUser(New, "Internal error handling connection");
 148         }
 149
 150         /* NOTE: even if dns lookups are *off*, we still need to display this.
 151          * BOPM and other stuff requires it.
 152          */
 153         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 154
 155         if (Instance->Config->NoUserDns)
 156         {
 157                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 158                 New->dns_done = true;
 159         }
 160         else
 161         {
 162                 New->StartDNSLookup();
 163         }
 164 }
 165
 166 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 167 {
 168         if (user->quitting)
 169         {
 170                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 171                 return;
 172         }
 173
 174         if (IS_FAKE(user))
 175         {
 176                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a fake user (%s)", user->nick.c_str());
 177                 return;
 178         }
 179
 180         user->quitting = true;
 181
 182         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s '%s'", user->nick.c_str(), quitreason.c_str());
 183         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 184
 185         std::string reason;
 186         std::string oper_reason;
 187         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 188         if (operreason && *operreason)
 189                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 190         else
 191                 oper_reason = quitreason;
 192
 193         ServerInstance->GlobalCulls.AddItem(user);
 194
 195         if (user->registered == REG_ALL)
 196         {
 197                 FOREACH_MOD_I(ServerInstance,I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 198                 user->PurgeEmptyChannels();
 199                 user->WriteCommonQuit(reason, oper_reason);
 200         }
 201
 202         FOREACH_MOD_I(ServerInstance,I_OnUserDisconnect,OnUserDisconnect(user));
 203
 204         user->UpdateNickHash(user->uuid.c_str());
 205
 206         user_hash::iterator iter = this->clientlist->find(user->uuid);
 207
 208         if (user->registered != REG_ALL)
 209                 if (ServerInstance->Users->unregistered_count)
 210                         ServerInstance->Users->unregistered_count--;
 211
 212         if (IS_LOCAL(user))
 213         {
 214                 if (!user->sendq.empty())
 215                         user->FlushWriteBuf();
 216
 217                 if (user->GetIOHook())
 218                 {
 219                         try
 220                         {
 221                                 user->GetIOHook()->OnRawSocketClose(user->GetFd());
 222                         }
 223                         catch (CoreException& modexcept)
 224                         {
 225                                 ServerInstance->Logs->Log("USERS",DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 226                         }
 227                 }
 228
 229                 ServerInstance->SE->DelFd(user);
 230                 user->CloseSocket();
 231         }
 232
 233         /*
 234          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 235          * if they were an oper with +sn +qQ.
 236          */
 237         if (user->registered == REG_ALL)
 238         {
 239                 if (IS_LOCAL(user))
 240                 {
 241                         if (!user->quietquit)
 242                         {
 243                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s [%s]",
 244                                         user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 245                         }
 246                 }
 247                 else
 248                 {
 249                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 250                         {
 251                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s [%s]",
 252                                         user->server, user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 253                         }
 254                 }
 255                 user->AddToWhoWas();
 256         }
 257
 258         if (iter != this->clientlist->end())
 259                 this->clientlist->erase(iter);
 260         else
 261                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 262
 263         if (IS_LOCAL(user))
 264         {
 265                 std::vector<User*>::iterator x = find(local_users.begin(),local_users.end(),user);
 266                 if (x != local_users.end())
 267                         local_users.erase(x);
 268                 else
 269                         ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 270         }
 271 }
 272
 273
 274 void UserManager::AddLocalClone(User *user)
 275 {
 276         int range = 32;
 277         clonemap::iterator x;
 278         switch (user->client_sa.sa.sa_family)
 279         {
 280                 case AF_INET6:
 281                         range = ServerInstance->Config->c_ipv6_range;
 282                 break;
 283                 case AF_INET:
 284                         range = ServerInstance->Config->c_ipv4_range;
 285                 break;
 286         }
 287
 288         x = local_clones.find(user->GetCIDRMask(range));
 289         if (x != local_clones.end())
 290                 x->second++;
 291         else
 292                 local_clones[user->GetCIDRMask(range)] = 1;
 293 }
 294
 295 void UserManager::AddGlobalClone(User *user)
 296 {
 297         int range = 32;
 298         clonemap::iterator x;
 299         switch (user->client_sa.sa.sa_family)
 300         {
 301                 case AF_INET6:
 302                         range = ServerInstance->Config->c_ipv6_range;
 303                 break;
 304                 case AF_INET:
 305                         range = ServerInstance->Config->c_ipv4_range;
 306                 break;
 307         }
 308
 309         x = global_clones.find(user->GetCIDRMask(range));
 310         if (x != global_clones.end())
 311                 x->second++;
 312         else
 313                 global_clones[user->GetCIDRMask(range)] = 1;
 314 }
 315
 316 void UserManager::RemoveCloneCounts(User *user)
 317 {
 318         int range = 32;
 319         switch (user->client_sa.sa.sa_family)
 320         {
 321                 case AF_INET6:
 322                         range = ServerInstance->Config->c_ipv6_range;
 323                 break;
 324                 case AF_INET:
 325                         range = ServerInstance->Config->c_ipv4_range;
 326                 break;
 327         }
 328
 329         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 330         if (x != local_clones.end())
 331         {
 332                 x->second--;
 333                 if (!x->second)
 334                 {
 335                         local_clones.erase(x);
 336                 }
 337         }
 338
 339         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 340         if (y != global_clones.end())
 341         {
 342                 y->second--;
 343                 if (!y->second)
 344                 {
 345                         global_clones.erase(y);
 346                 }
 347         }
 348 }
 349
 350 unsigned long UserManager::GlobalCloneCount(User *user)
 351 {
 352         int range = 32;
 353         switch (user->client_sa.sa.sa_family)
 354         {
 355                 case AF_INET6:
 356                         range = ServerInstance->Config->c_ipv6_range;
 357                 break;
 358                 case AF_INET:
 359                         range = ServerInstance->Config->c_ipv4_range;
 360                 break;
 361         }
 362         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 363         if (x != global_clones.end())
 364                 return x->second;
 365         else
 366                 return 0;
 367 }
 368
 369 unsigned long UserManager::LocalCloneCount(User *user)
 370 {
 371         int range = 32;
 372         switch (user->client_sa.sa.sa_family)
 373         {
 374                 case AF_INET6:
 375                         range = ServerInstance->Config->c_ipv6_range;
 376                 break;
 377                 case AF_INET:
 378                         range = ServerInstance->Config->c_ipv4_range;
 379                 break;
 380         }
 381         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 382         if (x != local_clones.end())
 383                 return x->second;
 384         else
 385                 return 0;
 386 }
 387
 388 /* this function counts all users connected, wether they are registered or NOT. */
 389 unsigned int UserManager::UserCount()
 390 {
 391         /*
 392          * XXX: Todo:
 393          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 394          *      -- w00t
 395          */
 396         return this->clientlist->size();
 397 }
 398
 399 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 400 unsigned int UserManager::RegisteredUserCount()
 401 {
 402         return this->clientlist->size() - this->UnregisteredUserCount();
 403 }
 404
 405 /* return how many users are opered */
 406 unsigned int UserManager::OperCount()
 407 {
 408         return this->all_opers.size();
 409 }
 410
 411 /* return how many users are unregistered */
 412 unsigned int UserManager::UnregisteredUserCount()
 413 {
 414         return this->unregistered_count;
 415 }
 416
 417 /* return how many local registered users there are */
 418 unsigned int UserManager::LocalUserCount()
 419 {
 420         /* Doesnt count unregistered clients */
 421         return (this->local_users.size() - this->UnregisteredUserCount());
 422 }
 423
 424 void UserManager::ServerNoticeAll(const char* text, ...)
 425 {
 426         if (!text)
 427                 return;
 428
 429         char textbuffer[MAXBUF];
 430         char formatbuffer[MAXBUF];
 431         va_list argsPtr;
 432         va_start (argsPtr, text);
 433         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 434         va_end(argsPtr);
 435
 436         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 437
 438         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 439         {
 440                 User* t = *i;
 441                 t->WriteServ(std::string(formatbuffer));
 442         }
 443 }
 444
 445 void UserManager::ServerPrivmsgAll(const char* text, ...)
 446 {
 447         if (!text)
 448                 return;
 449
 450         char textbuffer[MAXBUF];
 451         char formatbuffer[MAXBUF];
 452         va_list argsPtr;
 453         va_start (argsPtr, text);
 454         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 455         va_end(argsPtr);
 456
 457         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 458
 459         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 460         {
 461                 User* t = *i;
 462                 t->WriteServ(std::string(formatbuffer));
 463         }
 464 }
 465
 466 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 467 {
 468         char textbuffer[MAXBUF];
 469         int modelen;
 470         va_list argsPtr;
 471
 472         if (!text || !modes || !flags)
 473         {
 474                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 475                 return;
 476         }
 477
 478         va_start(argsPtr, text);
 479         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 480         va_end(argsPtr);
 481         modelen = strlen(modes);
 482
 483         if (flags == WM_AND)
 484         {
 485                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 486                 {
 487                         User* t = *i;
 488                         bool send_to_user = true;
 489
 490                         for (int n = 0; n < modelen; n++)
 491                         {
 492                                 if (!t->IsModeSet(modes[n]))
 493                                 {
 494                                         send_to_user = false;
 495                                         break;
 496                                 }
 497                         }
 498                         if (send_to_user)
 499                         {
 500                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 501                         }
 502                 }
 503         }
 504         else if (flags == WM_OR)
 505         {
 506                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 507                 {
 508                         User* t = *i;
 509                         bool send_to_user = false;
 510
 511                         for (int n = 0; n < modelen; n++)
 512                         {
 513                                 if (t->IsModeSet(modes[n]))
 514                                 {
 515                                         send_to_user = true;
 516                                         break;
 517                                 }
 518                         }
 519
 520                         if (send_to_user)
 521                         {
 522                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 523                         }
 524                 }
 525         }
 526 }
 527
 528 /* return how many users have a given mode e.g. 'a' */
 529 int UserManager::ModeCount(const char mode)
 530 {
 531         ModeHandler* mh = this->ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 532
 533         if (mh)
 534                 return mh->GetCount();
 535         else
 536                 return 0;
 537 }