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(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         LocalUser* New = NULL;
  27         try
  28         {
  29                 New = new LocalUser();
  30         }
  31         catch (...)
  32         {
  33                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
  34                 ServerInstance->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_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         ServerInstance->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 = ServerInstance->Config->ServerName;
  67         New->ident.assign("unknown");
  68
  69         New->registered = REG_NONE;
  70         New->signon = ServerInstance->Time() + ServerInstance->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         ServerInstance->Users->AddLocalClone(New);
  78         ServerInstance->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() > ServerInstance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)ServerInstance->SE->GetMaxFds()))
 101         {
 102                 ServerInstance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", ServerInstance->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 = (ServerInstance->XLines->MatchesLine("E",New) != NULL);
 113
 114         if (BanCacheHit *b = ServerInstance->BanCache->GetHit(New->GetIPString()))
 115         {
 116                 if (!b->Type.empty() && !New->exempt)
 117                 {
 118                         /* user banned */
 119                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 120                         if (!ServerInstance->Config->MoronBanner.empty())
 121                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), ServerInstance->Config->MoronBanner.c_str());
 122                         this->QuitUser(New, b->Reason);
 123                         return;
 124                 }
 125                 else
 126                 {
 127                         ServerInstance->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 = ServerInstance->XLines->MatchesLine("Z",New);
 135
 136                         if (r)
 137                         {
 138                                 r->Apply(New);
 139                                 return;
 140                         }
 141                 }
 142         }
 143
 144         if (!ServerInstance->SE->AddFd(New, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE))
 145         {
 146                 ServerInstance->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 (ServerInstance->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_SERVER(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 '%s'", user->uuid.c_str(), 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_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 198                 user->WriteCommonQuit(reason, oper_reason);
 199         }
 200
 201         if (user->registered != REG_ALL)
 202                 if (ServerInstance->Users->unregistered_count)
 203                         ServerInstance->Users->unregistered_count--;
 204
 205         if (IS_LOCAL(user))
 206         {
 207                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(IS_LOCAL(user)));
 208                 user->DoWrite();
 209                 if (user->GetIOHook())
 210                 {
 211                         try
 212                         {
 213                                 user->GetIOHook()->OnStreamSocketClose(user);
 214                         }
 215                         catch (CoreException& modexcept)
 216                         {
 217                                 ServerInstance->Logs->Log("USERS",DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 218                         }
 219                 }
 220
 221                 ServerInstance->SE->DelFd(user);
 222                 user->Close();
 223                 // user->Close() will set fd to -1; this breaks IS_LOCAL. Fix
 224                 user->SetFd(INT_MAX);
 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.c_str(), user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 247                         }
 248                 }
 249                 user->AddToWhoWas();
 250         }
 251
 252         user_hash::iterator iter = this->clientlist->find(user->nick);
 253
 254         if (iter != this->clientlist->end())
 255                 this->clientlist->erase(iter);
 256         else
 257                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 258 }
 259
 260
 261 void UserManager::AddLocalClone(User *user)
 262 {
 263         int range = 32;
 264         clonemap::iterator x;
 265         switch (user->client_sa.sa.sa_family)
 266         {
 267                 case AF_INET6:
 268                         range = ServerInstance->Config->c_ipv6_range;
 269                 break;
 270                 case AF_INET:
 271                         range = ServerInstance->Config->c_ipv4_range;
 272                 break;
 273         }
 274
 275         x = local_clones.find(user->GetCIDRMask(range));
 276         if (x != local_clones.end())
 277                 x->second++;
 278         else
 279                 local_clones[user->GetCIDRMask(range)] = 1;
 280 }
 281
 282 void UserManager::AddGlobalClone(User *user)
 283 {
 284         int range = 32;
 285         clonemap::iterator x;
 286         switch (user->client_sa.sa.sa_family)
 287         {
 288                 case AF_INET6:
 289                         range = ServerInstance->Config->c_ipv6_range;
 290                 break;
 291                 case AF_INET:
 292                         range = ServerInstance->Config->c_ipv4_range;
 293                 break;
 294         }
 295
 296         x = global_clones.find(user->GetCIDRMask(range));
 297         if (x != global_clones.end())
 298                 x->second++;
 299         else
 300                 global_clones[user->GetCIDRMask(range)] = 1;
 301 }
 302
 303 void UserManager::RemoveCloneCounts(User *user)
 304 {
 305         int range = 32;
 306         switch (user->client_sa.sa.sa_family)
 307         {
 308                 case AF_INET6:
 309                         range = ServerInstance->Config->c_ipv6_range;
 310                 break;
 311                 case AF_INET:
 312                         range = ServerInstance->Config->c_ipv4_range;
 313                 break;
 314         }
 315
 316         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 317         if (x != local_clones.end())
 318         {
 319                 x->second--;
 320                 if (!x->second)
 321                 {
 322                         local_clones.erase(x);
 323                 }
 324         }
 325
 326         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 327         if (y != global_clones.end())
 328         {
 329                 y->second--;
 330                 if (!y->second)
 331                 {
 332                         global_clones.erase(y);
 333                 }
 334         }
 335 }
 336
 337 unsigned long UserManager::GlobalCloneCount(User *user)
 338 {
 339         int range = 32;
 340         switch (user->client_sa.sa.sa_family)
 341         {
 342                 case AF_INET6:
 343                         range = ServerInstance->Config->c_ipv6_range;
 344                 break;
 345                 case AF_INET:
 346                         range = ServerInstance->Config->c_ipv4_range;
 347                 break;
 348         }
 349         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 350         if (x != global_clones.end())
 351                 return x->second;
 352         else
 353                 return 0;
 354 }
 355
 356 unsigned long UserManager::LocalCloneCount(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 = local_clones.find(user->GetCIDRMask(range));
 369         if (x != local_clones.end())
 370                 return x->second;
 371         else
 372                 return 0;
 373 }
 374
 375 /* this function counts all users connected, wether they are registered or NOT. */
 376 unsigned int UserManager::UserCount()
 377 {
 378         /*
 379          * XXX: Todo:
 380          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 381          *      -- w00t
 382          */
 383         return this->clientlist->size();
 384 }
 385
 386 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 387 unsigned int UserManager::RegisteredUserCount()
 388 {
 389         return this->clientlist->size() - this->UnregisteredUserCount();
 390 }
 391
 392 /* return how many users are opered */
 393 unsigned int UserManager::OperCount()
 394 {
 395         return this->all_opers.size();
 396 }
 397
 398 /* return how many users are unregistered */
 399 unsigned int UserManager::UnregisteredUserCount()
 400 {
 401         return this->unregistered_count;
 402 }
 403
 404 /* return how many local registered users there are */
 405 unsigned int UserManager::LocalUserCount()
 406 {
 407         /* Doesnt count unregistered clients */
 408         return (this->local_users.size() - this->UnregisteredUserCount());
 409 }
 410
 411 void UserManager::ServerNoticeAll(const char* text, ...)
 412 {
 413         if (!text)
 414                 return;
 415
 416         char textbuffer[MAXBUF];
 417         char formatbuffer[MAXBUF];
 418         va_list argsPtr;
 419         va_start (argsPtr, text);
 420         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 421         va_end(argsPtr);
 422
 423         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 424
 425         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 426         {
 427                 User* t = *i;
 428                 t->WriteServ(std::string(formatbuffer));
 429         }
 430 }
 431
 432 void UserManager::ServerPrivmsgAll(const char* text, ...)
 433 {
 434         if (!text)
 435                 return;
 436
 437         char textbuffer[MAXBUF];
 438         char formatbuffer[MAXBUF];
 439         va_list argsPtr;
 440         va_start (argsPtr, text);
 441         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 442         va_end(argsPtr);
 443
 444         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 445
 446         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 447         {
 448                 User* t = *i;
 449                 t->WriteServ(std::string(formatbuffer));
 450         }
 451 }
 452
 453 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 454 {
 455         char textbuffer[MAXBUF];
 456         int modelen;
 457         va_list argsPtr;
 458
 459         if (!text || !modes || !flags)
 460         {
 461                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 462                 return;
 463         }
 464
 465         va_start(argsPtr, text);
 466         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 467         va_end(argsPtr);
 468         modelen = strlen(modes);
 469
 470         if (flags == WM_AND)
 471         {
 472                 for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 473                 {
 474                         User* t = *i;
 475                         bool send_to_user = true;
 476
 477                         for (int n = 0; n < modelen; n++)
 478                         {
 479                                 if (!t->IsModeSet(modes[n]))
 480                                 {
 481                                         send_to_user = false;
 482                                         break;
 483                                 }
 484                         }
 485                         if (send_to_user)
 486                         {
 487                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 488                         }
 489                 }
 490         }
 491         else if (flags == WM_OR)
 492         {
 493                 for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 494                 {
 495                         User* t = *i;
 496                         bool send_to_user = false;
 497
 498                         for (int n = 0; n < modelen; n++)
 499                         {
 500                                 if (t->IsModeSet(modes[n]))
 501                                 {
 502                                         send_to_user = true;
 503                                         break;
 504                                 }
 505                         }
 506
 507                         if (send_to_user)
 508                         {
 509                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 510                         }
 511                 }
 512         }
 513 }
 514
 515 /* return how many users have a given mode e.g. 'a' */
 516 int UserManager::ModeCount(const char mode)
 517 {
 518         ModeHandler* mh = ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 519
 520         if (mh)
 521                 return mh->GetCount();
 522         else
 523                 return 0;
 524 }