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         user->quitting = true;
 175
 176         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s '%s'", user->nick.c_str(), quitreason.c_str());
 177         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 178
 179         std::string reason;
 180         std::string oper_reason;
 181         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 182         if (operreason && *operreason)
 183                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 184         else
 185                 oper_reason = quitreason;
 186
 187         ServerInstance->GlobalCulls.AddItem(user);
 188
 189         if (user->registered == REG_ALL)
 190         {
 191                 FOREACH_MOD_I(ServerInstance,I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 192                 user->PurgeEmptyChannels();
 193                 user->WriteCommonQuit(reason, oper_reason);
 194         }
 195
 196         FOREACH_MOD_I(ServerInstance,I_OnUserDisconnect,OnUserDisconnect(user));
 197
 198         user->UpdateNickHash(user->uuid.c_str());
 199
 200         user_hash::iterator iter = this->clientlist->find(user->uuid);
 201
 202         if (user->registered != REG_ALL)
 203                 if (ServerInstance->Users->unregistered_count)
 204                         ServerInstance->Users->unregistered_count--;
 205
 206         if (IS_LOCAL(user))
 207         {
 208                 if (!user->sendq.empty())
 209                         user->FlushWriteBuf();
 210
 211                 if (user->GetIOHook())
 212                 {
 213                         try
 214                         {
 215                                 user->GetIOHook()->OnRawSocketClose(user->GetFd());
 216                         }
 217                         catch (CoreException& modexcept)
 218                         {
 219                                 ServerInstance->Logs->Log("USERS",DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 220                         }
 221                 }
 222
 223                 ServerInstance->SE->DelFd(user);
 224                 user->CloseSocket();
 225         }
 226
 227         /*
 228          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 229          * if they were an oper with +sn +qQ.
 230          */
 231         if (user->registered == REG_ALL)
 232         {
 233                 if (IS_LOCAL(user))
 234                 {
 235                         if (!user->quietquit)
 236                         {
 237                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s [%s]",
 238                                         user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 239                         }
 240                 }
 241                 else
 242                 {
 243                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 244                         {
 245                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s [%s]",
 246                                         user->server, user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 247                         }
 248                 }
 249                 user->AddToWhoWas();
 250         }
 251
 252         if (iter != this->clientlist->end())
 253                 this->clientlist->erase(iter);
 254         else
 255                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 256
 257         if (IS_LOCAL(user))
 258         {
 259                 std::vector<User*>::iterator x = find(local_users.begin(),local_users.end(),user);
 260                 if (x != local_users.end())
 261                         local_users.erase(x);
 262                 else
 263                         ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 264         }
 265 }
 266
 267
 268 void UserManager::AddLocalClone(User *user)
 269 {
 270         int range = 32;
 271         clonemap::iterator x;
 272         switch (user->client_sa.sa.sa_family)
 273         {
 274                 case AF_INET6:
 275                         range = ServerInstance->Config->c_ipv6_range;
 276                 break;
 277                 case AF_INET:
 278                         range = ServerInstance->Config->c_ipv4_range;
 279                 break;
 280         }
 281
 282         x = local_clones.find(user->GetCIDRMask(range));
 283         if (x != local_clones.end())
 284                 x->second++;
 285         else
 286                 local_clones[user->GetCIDRMask(range)] = 1;
 287 }
 288
 289 void UserManager::AddGlobalClone(User *user)
 290 {
 291         int range = 32;
 292         clonemap::iterator x;
 293         switch (user->client_sa.sa.sa_family)
 294         {
 295                 case AF_INET6:
 296                         range = ServerInstance->Config->c_ipv6_range;
 297                 break;
 298                 case AF_INET:
 299                         range = ServerInstance->Config->c_ipv4_range;
 300                 break;
 301         }
 302
 303         x = global_clones.find(user->GetCIDRMask(range));
 304         if (x != global_clones.end())
 305                 x->second++;
 306         else
 307                 global_clones[user->GetCIDRMask(range)] = 1;
 308 }
 309
 310 void UserManager::RemoveCloneCounts(User *user)
 311 {
 312         int range = 32;
 313         switch (user->client_sa.sa.sa_family)
 314         {
 315                 case AF_INET6:
 316                         range = ServerInstance->Config->c_ipv6_range;
 317                 break;
 318                 case AF_INET:
 319                         range = ServerInstance->Config->c_ipv4_range;
 320                 break;
 321         }
 322
 323         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 324         if (x != local_clones.end())
 325         {
 326                 x->second--;
 327                 if (!x->second)
 328                 {
 329                         local_clones.erase(x);
 330                 }
 331         }
 332
 333         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 334         if (y != global_clones.end())
 335         {
 336                 y->second--;
 337                 if (!y->second)
 338                 {
 339                         global_clones.erase(y);
 340                 }
 341         }
 342 }
 343
 344 unsigned long UserManager::GlobalCloneCount(User *user)
 345 {
 346         int range = 32;
 347         switch (user->client_sa.sa.sa_family)
 348         {
 349                 case AF_INET6:
 350                         range = ServerInstance->Config->c_ipv6_range;
 351                 break;
 352                 case AF_INET:
 353                         range = ServerInstance->Config->c_ipv4_range;
 354                 break;
 355         }
 356         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 357         if (x != global_clones.end())
 358                 return x->second;
 359         else
 360                 return 0;
 361 }
 362
 363 unsigned long UserManager::LocalCloneCount(User *user)
 364 {
 365         int range = 32;
 366         switch (user->client_sa.sa.sa_family)
 367         {
 368                 case AF_INET6:
 369                         range = ServerInstance->Config->c_ipv6_range;
 370                 break;
 371                 case AF_INET:
 372                         range = ServerInstance->Config->c_ipv4_range;
 373                 break;
 374         }
 375         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 376         if (x != local_clones.end())
 377                 return x->second;
 378         else
 379                 return 0;
 380 }
 381
 382 /* this function counts all users connected, wether they are registered or NOT. */
 383 unsigned int UserManager::UserCount()
 384 {
 385         /*
 386          * XXX: Todo:
 387          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 388          *      -- w00t
 389          */
 390         return this->clientlist->size();
 391 }
 392
 393 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 394 unsigned int UserManager::RegisteredUserCount()
 395 {
 396         return this->clientlist->size() - this->UnregisteredUserCount();
 397 }
 398
 399 /* return how many users are opered */
 400 unsigned int UserManager::OperCount()
 401 {
 402         return this->all_opers.size();
 403 }
 404
 405 /* return how many users are unregistered */
 406 unsigned int UserManager::UnregisteredUserCount()
 407 {
 408         return this->unregistered_count;
 409 }
 410
 411 /* return how many local registered users there are */
 412 unsigned int UserManager::LocalUserCount()
 413 {
 414         /* Doesnt count unregistered clients */
 415         return (this->local_users.size() - this->UnregisteredUserCount());
 416 }
 417
 418 void UserManager::ServerNoticeAll(const char* text, ...)
 419 {
 420         if (!text)
 421                 return;
 422
 423         char textbuffer[MAXBUF];
 424         char formatbuffer[MAXBUF];
 425         va_list argsPtr;
 426         va_start (argsPtr, text);
 427         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 428         va_end(argsPtr);
 429
 430         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 431
 432         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 433         {
 434                 User* t = *i;
 435                 t->WriteServ(std::string(formatbuffer));
 436         }
 437 }
 438
 439 void UserManager::ServerPrivmsgAll(const char* text, ...)
 440 {
 441         if (!text)
 442                 return;
 443
 444         char textbuffer[MAXBUF];
 445         char formatbuffer[MAXBUF];
 446         va_list argsPtr;
 447         va_start (argsPtr, text);
 448         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 449         va_end(argsPtr);
 450
 451         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 452
 453         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 454         {
 455                 User* t = *i;
 456                 t->WriteServ(std::string(formatbuffer));
 457         }
 458 }
 459
 460 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 461 {
 462         char textbuffer[MAXBUF];
 463         int modelen;
 464         va_list argsPtr;
 465
 466         if (!text || !modes || !flags)
 467         {
 468                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 469                 return;
 470         }
 471
 472         va_start(argsPtr, text);
 473         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 474         va_end(argsPtr);
 475         modelen = strlen(modes);
 476
 477         if (flags == WM_AND)
 478         {
 479                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 480                 {
 481                         User* t = *i;
 482                         bool send_to_user = true;
 483
 484                         for (int n = 0; n < modelen; n++)
 485                         {
 486                                 if (!t->IsModeSet(modes[n]))
 487                                 {
 488                                         send_to_user = false;
 489                                         break;
 490                                 }
 491                         }
 492                         if (send_to_user)
 493                         {
 494                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 495                         }
 496                 }
 497         }
 498         else if (flags == WM_OR)
 499         {
 500                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 501                 {
 502                         User* t = *i;
 503                         bool send_to_user = false;
 504
 505                         for (int n = 0; n < modelen; n++)
 506                         {
 507                                 if (t->IsModeSet(modes[n]))
 508                                 {
 509                                         send_to_user = true;
 510                                         break;
 511                                 }
 512                         }
 513
 514                         if (send_to_user)
 515                         {
 516                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 517                         }
 518                 }
 519         }
 520 }
 521
 522 /* return how many users have a given mode e.g. 'a' */
 523 int UserManager::ModeCount(const char mode)
 524 {
 525         ModeHandler* mh = this->ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 526
 527         if (mh)
 528                 return mh->GetCount();
 529         else
 530                 return 0;
 531 }