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         user->quietquit = false;
 180         user->quitmsg = quitreason;
 181
 182         std::string reason;
 183         std::string oper_reason;
 184         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 185         if (!*operreason)
 186         {
 187                 user->operquitmsg = quitreason;
 188                 oper_reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 189         }
 190         else
 191         {
 192                 user->operquitmsg = operreason;
 193                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 194         }
 195
 196         ServerInstance->GlobalCulls.AddItem(user);
 197
 198         if (user->registered == REG_ALL)
 199         {
 200                 FOREACH_MOD_I(ServerInstance,I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 201                 user->PurgeEmptyChannels();
 202                 user->WriteCommonQuit(reason, oper_reason);
 203         }
 204
 205         FOREACH_MOD_I(ServerInstance,I_OnUserDisconnect,OnUserDisconnect(user));
 206
 207         user->UpdateNickHash(user->uuid.c_str());
 208
 209         user_hash::iterator iter = this->clientlist->find(user->uuid);
 210
 211         if (user->registered != REG_ALL)
 212                 if (ServerInstance->Users->unregistered_count)
 213                         ServerInstance->Users->unregistered_count--;
 214
 215         if (IS_LOCAL(user))
 216         {
 217                 if (!user->sendq.empty())
 218                         user->FlushWriteBuf();
 219
 220                 if (user->GetIOHook())
 221                 {
 222                         try
 223                         {
 224                                 user->GetIOHook()->OnRawSocketClose(user->GetFd());
 225                         }
 226                         catch (CoreException& modexcept)
 227                         {
 228                                 ServerInstance->Logs->Log("USERS",DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 229                         }
 230                 }
 231
 232                 ServerInstance->SE->DelFd(user);
 233                 user->CloseSocket();
 234         }
 235
 236         /*
 237          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 238          * if they were an oper with +sn +qQ.
 239          */
 240         if (user->registered == REG_ALL)
 241         {
 242                 if (IS_LOCAL(user))
 243                 {
 244                         if (!user->quietquit)
 245                         {
 246                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s [%s]",
 247                                         user->nick.c_str(), user->ident.c_str(), user->host.c_str(), user->operquitmsg.c_str());
 248                         }
 249                 }
 250                 else
 251                 {
 252                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 253                         {
 254                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s [%s]",
 255                                         user->server, user->nick.c_str(), user->ident.c_str(), user->host.c_str(), user->operquitmsg.c_str());
 256                         }
 257                 }
 258                 user->AddToWhoWas();
 259         }
 260
 261         if (iter != this->clientlist->end())
 262                 this->clientlist->erase(iter);
 263         else
 264                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 265
 266         if (IS_LOCAL(user))
 267         {
 268                 std::vector<User*>::iterator x = find(local_users.begin(),local_users.end(),user);
 269                 if (x != local_users.end())
 270                         local_users.erase(x);
 271                 else
 272                         ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 273         }
 274 }
 275
 276
 277 void UserManager::AddLocalClone(User *user)
 278 {
 279         int range = 32;
 280         clonemap::iterator x;
 281         switch (user->client_sa.sa.sa_family)
 282         {
 283                 case AF_INET6:
 284                         range = ServerInstance->Config->c_ipv6_range;
 285                 break;
 286                 case AF_INET:
 287                         range = ServerInstance->Config->c_ipv4_range;
 288                 break;
 289         }
 290
 291         x = local_clones.find(user->GetCIDRMask(range));
 292         if (x != local_clones.end())
 293                 x->second++;
 294         else
 295                 local_clones[user->GetCIDRMask(range)] = 1;
 296 }
 297
 298 void UserManager::AddGlobalClone(User *user)
 299 {
 300         int range = 32;
 301         clonemap::iterator x;
 302         switch (user->client_sa.sa.sa_family)
 303         {
 304                 case AF_INET6:
 305                         range = ServerInstance->Config->c_ipv6_range;
 306                 break;
 307                 case AF_INET:
 308                         range = ServerInstance->Config->c_ipv4_range;
 309                 break;
 310         }
 311
 312         x = global_clones.find(user->GetCIDRMask(range));
 313         if (x != global_clones.end())
 314                 x->second++;
 315         else
 316                 global_clones[user->GetCIDRMask(range)] = 1;
 317 }
 318
 319 void UserManager::RemoveCloneCounts(User *user)
 320 {
 321         int range = 32;
 322         switch (user->client_sa.sa.sa_family)
 323         {
 324                 case AF_INET6:
 325                         range = ServerInstance->Config->c_ipv6_range;
 326                 break;
 327                 case AF_INET:
 328                         range = ServerInstance->Config->c_ipv4_range;
 329                 break;
 330         }
 331
 332         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 333         if (x != local_clones.end())
 334         {
 335                 x->second--;
 336                 if (!x->second)
 337                 {
 338                         local_clones.erase(x);
 339                 }
 340         }
 341
 342         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 343         if (y != global_clones.end())
 344         {
 345                 y->second--;
 346                 if (!y->second)
 347                 {
 348                         global_clones.erase(y);
 349                 }
 350         }
 351 }
 352
 353 unsigned long UserManager::GlobalCloneCount(User *user)
 354 {
 355         int range = 32;
 356         switch (user->client_sa.sa.sa_family)
 357         {
 358                 case AF_INET6:
 359                         range = ServerInstance->Config->c_ipv6_range;
 360                 break;
 361                 case AF_INET:
 362                         range = ServerInstance->Config->c_ipv4_range;
 363                 break;
 364         }
 365         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 366         if (x != global_clones.end())
 367                 return x->second;
 368         else
 369                 return 0;
 370 }
 371
 372 unsigned long UserManager::LocalCloneCount(User *user)
 373 {
 374         int range = 32;
 375         switch (user->client_sa.sa.sa_family)
 376         {
 377                 case AF_INET6:
 378                         range = ServerInstance->Config->c_ipv6_range;
 379                 break;
 380                 case AF_INET:
 381                         range = ServerInstance->Config->c_ipv4_range;
 382                 break;
 383         }
 384         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 385         if (x != local_clones.end())
 386                 return x->second;
 387         else
 388                 return 0;
 389 }
 390
 391 /* this function counts all users connected, wether they are registered or NOT. */
 392 unsigned int UserManager::UserCount()
 393 {
 394         /*
 395          * XXX: Todo:
 396          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 397          *      -- w00t
 398          */
 399         return this->clientlist->size();
 400 }
 401
 402 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 403 unsigned int UserManager::RegisteredUserCount()
 404 {
 405         return this->clientlist->size() - this->UnregisteredUserCount();
 406 }
 407
 408 /* return how many users are opered */
 409 unsigned int UserManager::OperCount()
 410 {
 411         return this->all_opers.size();
 412 }
 413
 414 /* return how many users are unregistered */
 415 unsigned int UserManager::UnregisteredUserCount()
 416 {
 417         return this->unregistered_count;
 418 }
 419
 420 /* return how many local registered users there are */
 421 unsigned int UserManager::LocalUserCount()
 422 {
 423         /* Doesnt count unregistered clients */
 424         return (this->local_users.size() - this->UnregisteredUserCount());
 425 }
 426
 427 void UserManager::ServerNoticeAll(const char* text, ...)
 428 {
 429         if (!text)
 430                 return;
 431
 432         char textbuffer[MAXBUF];
 433         char formatbuffer[MAXBUF];
 434         va_list argsPtr;
 435         va_start (argsPtr, text);
 436         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 437         va_end(argsPtr);
 438
 439         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 440
 441         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 442         {
 443                 User* t = *i;
 444                 t->WriteServ(std::string(formatbuffer));
 445         }
 446 }
 447
 448 void UserManager::ServerPrivmsgAll(const char* text, ...)
 449 {
 450         if (!text)
 451                 return;
 452
 453         char textbuffer[MAXBUF];
 454         char formatbuffer[MAXBUF];
 455         va_list argsPtr;
 456         va_start (argsPtr, text);
 457         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 458         va_end(argsPtr);
 459
 460         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 461
 462         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 463         {
 464                 User* t = *i;
 465                 t->WriteServ(std::string(formatbuffer));
 466         }
 467 }
 468
 469 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 470 {
 471         char textbuffer[MAXBUF];
 472         int modelen;
 473         va_list argsPtr;
 474
 475         if (!text || !modes || !flags)
 476         {
 477                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 478                 return;
 479         }
 480
 481         va_start(argsPtr, text);
 482         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 483         va_end(argsPtr);
 484         modelen = strlen(modes);
 485
 486         if (flags == WM_AND)
 487         {
 488                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 489                 {
 490                         User* t = *i;
 491                         bool send_to_user = true;
 492
 493                         for (int n = 0; n < modelen; n++)
 494                         {
 495                                 if (!t->IsModeSet(modes[n]))
 496                                 {
 497                                         send_to_user = false;
 498                                         break;
 499                                 }
 500                         }
 501                         if (send_to_user)
 502                         {
 503                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 504                         }
 505                 }
 506         }
 507         else if (flags == WM_OR)
 508         {
 509                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 510                 {
 511                         User* t = *i;
 512                         bool send_to_user = false;
 513
 514                         for (int n = 0; n < modelen; n++)
 515                         {
 516                                 if (t->IsModeSet(modes[n]))
 517                                 {
 518                                         send_to_user = true;
 519                                         break;
 520                                 }
 521                         }
 522
 523                         if (send_to_user)
 524                         {
 525                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 526                         }
 527                 }
 528         }
 529 }
 530
 531 /* return how many users have a given mode e.g. 'a' */
 532 int UserManager::ModeCount(const char mode)
 533 {
 534         ModeHandler* mh = this->ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 535
 536         if (mh)
 537                 return mh->GetCount();
 538         else
 539                 return 0;
 540 }