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