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         if (IS_FAKE(user))
 181         {
 182                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a fake user (%s)", user->nick.c_str());
 183                 return;
 184         }
 185
 186         user->quitting = true;
 187
 188         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s '%s'", user->nick.c_str(), quitreason.c_str());
 189         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 190
 191         std::string reason;
 192         std::string oper_reason;
 193         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 194         if (operreason && *operreason)
 195                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 196         else
 197                 oper_reason = quitreason;
 198
 199         ServerInstance->GlobalCulls.AddItem(user);
 200
 201         if (user->registered == REG_ALL)
 202         {
 203                 FOREACH_MOD_I(ServerInstance,I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 204                 user->PurgeEmptyChannels();
 205                 user->WriteCommonQuit(reason, oper_reason);
 206         }
 207
 208         FOREACH_MOD_I(ServerInstance,I_OnUserDisconnect,OnUserDisconnect(user));
 209
 210         user->UpdateNickHash(user->uuid.c_str());
 211
 212         user_hash::iterator iter = this->clientlist->find(user->uuid);
 213
 214         if (user->registered != REG_ALL)
 215                 if (ServerInstance->Users->unregistered_count)
 216                         ServerInstance->Users->unregistered_count--;
 217
 218         if (IS_LOCAL(user))
 219         {
 220                 if (!user->sendq.empty())
 221                         user->FlushWriteBuf();
 222
 223                 if (user->GetIOHook())
 224                 {
 225                         try
 226                         {
 227                                 user->GetIOHook()->OnRawSocketClose(user->GetFd());
 228                         }
 229                         catch (CoreException& modexcept)
 230                         {
 231                                 ServerInstance->Logs->Log("USERS",DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 232                         }
 233                 }
 234
 235                 ServerInstance->SE->DelFd(user);
 236                 user->CloseSocket();
 237         }
 238
 239         /*
 240          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 241          * if they were an oper with +sn +qQ.
 242          */
 243         if (user->registered == REG_ALL)
 244         {
 245                 if (IS_LOCAL(user))
 246                 {
 247                         if (!user->quietquit)
 248                         {
 249                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s [%s]",
 250                                         user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 251                         }
 252                 }
 253                 else
 254                 {
 255                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 256                         {
 257                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s [%s]",
 258                                         user->server, user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 259                         }
 260                 }
 261                 user->AddToWhoWas();
 262         }
 263
 264         if (iter != this->clientlist->end())
 265                 this->clientlist->erase(iter);
 266         else
 267                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 268
 269         if (IS_LOCAL(user))
 270         {
 271                 std::vector<User*>::iterator x = find(local_users.begin(),local_users.end(),user);
 272                 if (x != local_users.end())
 273                         local_users.erase(x);
 274                 else
 275                         ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 276         }
 277 }
 278
 279
 280 void UserManager::AddLocalClone(User *user)
 281 {
 282         int range = 32;
 283         clonemap::iterator x;
 284         switch (user->client_sa.sa.sa_family)
 285         {
 286                 case AF_INET6:
 287                         range = ServerInstance->Config->c_ipv6_range;
 288                 break;
 289                 case AF_INET:
 290                         range = ServerInstance->Config->c_ipv4_range;
 291                 break;
 292         }
 293
 294         x = local_clones.find(user->GetCIDRMask(range));
 295         if (x != local_clones.end())
 296                 x->second++;
 297         else
 298                 local_clones[user->GetCIDRMask(range)] = 1;
 299 }
 300
 301 void UserManager::AddGlobalClone(User *user)
 302 {
 303         int range = 32;
 304         clonemap::iterator x;
 305         switch (user->client_sa.sa.sa_family)
 306         {
 307                 case AF_INET6:
 308                         range = ServerInstance->Config->c_ipv6_range;
 309                 break;
 310                 case AF_INET:
 311                         range = ServerInstance->Config->c_ipv4_range;
 312                 break;
 313         }
 314
 315         x = global_clones.find(user->GetCIDRMask(range));
 316         if (x != global_clones.end())
 317                 x->second++;
 318         else
 319                 global_clones[user->GetCIDRMask(range)] = 1;
 320 }
 321
 322 void UserManager::RemoveCloneCounts(User *user)
 323 {
 324         int range = 32;
 325         switch (user->client_sa.sa.sa_family)
 326         {
 327                 case AF_INET6:
 328                         range = ServerInstance->Config->c_ipv6_range;
 329                 break;
 330                 case AF_INET:
 331                         range = ServerInstance->Config->c_ipv4_range;
 332                 break;
 333         }
 334
 335         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 336         if (x != local_clones.end())
 337         {
 338                 x->second--;
 339                 if (!x->second)
 340                 {
 341                         local_clones.erase(x);
 342                 }
 343         }
 344
 345         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 346         if (y != global_clones.end())
 347         {
 348                 y->second--;
 349                 if (!y->second)
 350                 {
 351                         global_clones.erase(y);
 352                 }
 353         }
 354 }
 355
 356 unsigned long UserManager::GlobalCloneCount(User *user)
 357 {
 358         int range = 32;
 359         switch (user->client_sa.sa.sa_family)
 360         {
 361                 case AF_INET6:
 362                         range = ServerInstance->Config->c_ipv6_range;
 363                 break;
 364                 case AF_INET:
 365                         range = ServerInstance->Config->c_ipv4_range;
 366                 break;
 367         }
 368         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 369         if (x != global_clones.end())
 370                 return x->second;
 371         else
 372                 return 0;
 373 }
 374
 375 unsigned long UserManager::LocalCloneCount(User *user)
 376 {
 377         int range = 32;
 378         switch (user->client_sa.sa.sa_family)
 379         {
 380                 case AF_INET6:
 381                         range = ServerInstance->Config->c_ipv6_range;
 382                 break;
 383                 case AF_INET:
 384                         range = ServerInstance->Config->c_ipv4_range;
 385                 break;
 386         }
 387         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 388         if (x != local_clones.end())
 389                 return x->second;
 390         else
 391                 return 0;
 392 }
 393
 394 /* this function counts all users connected, wether they are registered or NOT. */
 395 unsigned int UserManager::UserCount()
 396 {
 397         /*
 398          * XXX: Todo:
 399          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 400          *      -- w00t
 401          */
 402         return this->clientlist->size();
 403 }
 404
 405 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 406 unsigned int UserManager::RegisteredUserCount()
 407 {
 408         return this->clientlist->size() - this->UnregisteredUserCount();
 409 }
 410
 411 /* return how many users are opered */
 412 unsigned int UserManager::OperCount()
 413 {
 414         return this->all_opers.size();
 415 }
 416
 417 /* return how many users are unregistered */
 418 unsigned int UserManager::UnregisteredUserCount()
 419 {
 420         return this->unregistered_count;
 421 }
 422
 423 /* return how many local registered users there are */
 424 unsigned int UserManager::LocalUserCount()
 425 {
 426         /* Doesnt count unregistered clients */
 427         return (this->local_users.size() - this->UnregisteredUserCount());
 428 }
 429
 430 void UserManager::ServerNoticeAll(const char* text, ...)
 431 {
 432         if (!text)
 433                 return;
 434
 435         char textbuffer[MAXBUF];
 436         char formatbuffer[MAXBUF];
 437         va_list argsPtr;
 438         va_start (argsPtr, text);
 439         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 440         va_end(argsPtr);
 441
 442         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 443
 444         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 445         {
 446                 User* t = *i;
 447                 t->WriteServ(std::string(formatbuffer));
 448         }
 449 }
 450
 451 void UserManager::ServerPrivmsgAll(const char* text, ...)
 452 {
 453         if (!text)
 454                 return;
 455
 456         char textbuffer[MAXBUF];
 457         char formatbuffer[MAXBUF];
 458         va_list argsPtr;
 459         va_start (argsPtr, text);
 460         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 461         va_end(argsPtr);
 462
 463         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 464
 465         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 466         {
 467                 User* t = *i;
 468                 t->WriteServ(std::string(formatbuffer));
 469         }
 470 }
 471
 472 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 473 {
 474         char textbuffer[MAXBUF];
 475         int modelen;
 476         va_list argsPtr;
 477
 478         if (!text || !modes || !flags)
 479         {
 480                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 481                 return;
 482         }
 483
 484         va_start(argsPtr, text);
 485         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 486         va_end(argsPtr);
 487         modelen = strlen(modes);
 488
 489         if (flags == WM_AND)
 490         {
 491                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 492                 {
 493                         User* t = *i;
 494                         bool send_to_user = true;
 495
 496                         for (int n = 0; n < modelen; n++)
 497                         {
 498                                 if (!t->IsModeSet(modes[n]))
 499                                 {
 500                                         send_to_user = false;
 501                                         break;
 502                                 }
 503                         }
 504                         if (send_to_user)
 505                         {
 506                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 507                         }
 508                 }
 509         }
 510         else if (flags == WM_OR)
 511         {
 512                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 513                 {
 514                         User* t = *i;
 515                         bool send_to_user = false;
 516
 517                         for (int n = 0; n < modelen; n++)
 518                         {
 519                                 if (t->IsModeSet(modes[n]))
 520                                 {
 521                                         send_to_user = true;
 522                                         break;
 523                                 }
 524                         }
 525
 526                         if (send_to_user)
 527                         {
 528                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 529                         }
 530                 }
 531         }
 532 }
 533
 534 /* return how many users have a given mode e.g. 'a' */
 535 int UserManager::ModeCount(const char mode)
 536 {
 537         ModeHandler* mh = this->ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 538
 539         if (mh)
 540                 return mh->GetCount();
 541         else
 542                 return 0;
 543 }