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         // Move the user onto their UID, to allow nick to be reused immediately
 208         user->UpdateNickHash(user->uuid.c_str());
 209 }
 210
 211
 212 void UserManager::AddLocalClone(User *user)
 213 {
 214         int range = 32;
 215         clonemap::iterator x;
 216         switch (user->client_sa.sa.sa_family)
 217         {
 218                 case AF_INET6:
 219                         range = ServerInstance->Config->c_ipv6_range;
 220                 break;
 221                 case AF_INET:
 222                         range = ServerInstance->Config->c_ipv4_range;
 223                 break;
 224         }
 225
 226         x = local_clones.find(user->GetCIDRMask(range));
 227         if (x != local_clones.end())
 228                 x->second++;
 229         else
 230                 local_clones[user->GetCIDRMask(range)] = 1;
 231 }
 232
 233 void UserManager::AddGlobalClone(User *user)
 234 {
 235         int range = 32;
 236         clonemap::iterator x;
 237         switch (user->client_sa.sa.sa_family)
 238         {
 239                 case AF_INET6:
 240                         range = ServerInstance->Config->c_ipv6_range;
 241                 break;
 242                 case AF_INET:
 243                         range = ServerInstance->Config->c_ipv4_range;
 244                 break;
 245         }
 246
 247         x = global_clones.find(user->GetCIDRMask(range));
 248         if (x != global_clones.end())
 249                 x->second++;
 250         else
 251                 global_clones[user->GetCIDRMask(range)] = 1;
 252 }
 253
 254 void UserManager::RemoveCloneCounts(User *user)
 255 {
 256         int range = 32;
 257         switch (user->client_sa.sa.sa_family)
 258         {
 259                 case AF_INET6:
 260                         range = ServerInstance->Config->c_ipv6_range;
 261                 break;
 262                 case AF_INET:
 263                         range = ServerInstance->Config->c_ipv4_range;
 264                 break;
 265         }
 266
 267         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 268         if (x != local_clones.end())
 269         {
 270                 x->second--;
 271                 if (!x->second)
 272                 {
 273                         local_clones.erase(x);
 274                 }
 275         }
 276
 277         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 278         if (y != global_clones.end())
 279         {
 280                 y->second--;
 281                 if (!y->second)
 282                 {
 283                         global_clones.erase(y);
 284                 }
 285         }
 286 }
 287
 288 unsigned long UserManager::GlobalCloneCount(User *user)
 289 {
 290         int range = 32;
 291         switch (user->client_sa.sa.sa_family)
 292         {
 293                 case AF_INET6:
 294                         range = ServerInstance->Config->c_ipv6_range;
 295                 break;
 296                 case AF_INET:
 297                         range = ServerInstance->Config->c_ipv4_range;
 298                 break;
 299         }
 300         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 301         if (x != global_clones.end())
 302                 return x->second;
 303         else
 304                 return 0;
 305 }
 306
 307 unsigned long UserManager::LocalCloneCount(User *user)
 308 {
 309         int range = 32;
 310         switch (user->client_sa.sa.sa_family)
 311         {
 312                 case AF_INET6:
 313                         range = ServerInstance->Config->c_ipv6_range;
 314                 break;
 315                 case AF_INET:
 316                         range = ServerInstance->Config->c_ipv4_range;
 317                 break;
 318         }
 319         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 320         if (x != local_clones.end())
 321                 return x->second;
 322         else
 323                 return 0;
 324 }
 325
 326 /* this function counts all users connected, wether they are registered or NOT. */
 327 unsigned int UserManager::UserCount()
 328 {
 329         /*
 330          * XXX: Todo:
 331          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 332          *      -- w00t
 333          */
 334         return this->clientlist->size();
 335 }
 336
 337 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 338 unsigned int UserManager::RegisteredUserCount()
 339 {
 340         return this->clientlist->size() - this->UnregisteredUserCount();
 341 }
 342
 343 /* return how many users are opered */
 344 unsigned int UserManager::OperCount()
 345 {
 346         return this->all_opers.size();
 347 }
 348
 349 /* return how many users are unregistered */
 350 unsigned int UserManager::UnregisteredUserCount()
 351 {
 352         return this->unregistered_count;
 353 }
 354
 355 /* return how many local registered users there are */
 356 unsigned int UserManager::LocalUserCount()
 357 {
 358         /* Doesnt count unregistered clients */
 359         return (this->local_users.size() - this->UnregisteredUserCount());
 360 }
 361
 362 void UserManager::ServerNoticeAll(const char* text, ...)
 363 {
 364         if (!text)
 365                 return;
 366
 367         char textbuffer[MAXBUF];
 368         char formatbuffer[MAXBUF];
 369         va_list argsPtr;
 370         va_start (argsPtr, text);
 371         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 372         va_end(argsPtr);
 373
 374         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 375
 376         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 377         {
 378                 User* t = *i;
 379                 t->WriteServ(std::string(formatbuffer));
 380         }
 381 }
 382
 383 void UserManager::ServerPrivmsgAll(const char* text, ...)
 384 {
 385         if (!text)
 386                 return;
 387
 388         char textbuffer[MAXBUF];
 389         char formatbuffer[MAXBUF];
 390         va_list argsPtr;
 391         va_start (argsPtr, text);
 392         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 393         va_end(argsPtr);
 394
 395         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 396
 397         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 398         {
 399                 User* t = *i;
 400                 t->WriteServ(std::string(formatbuffer));
 401         }
 402 }
 403
 404 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 405 {
 406         char textbuffer[MAXBUF];
 407         int modelen;
 408         va_list argsPtr;
 409
 410         if (!text || !modes || !flags)
 411         {
 412                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 413                 return;
 414         }
 415
 416         va_start(argsPtr, text);
 417         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 418         va_end(argsPtr);
 419         modelen = strlen(modes);
 420
 421         if (flags == WM_AND)
 422         {
 423                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 424                 {
 425                         User* t = *i;
 426                         bool send_to_user = true;
 427
 428                         for (int n = 0; n < modelen; n++)
 429                         {
 430                                 if (!t->IsModeSet(modes[n]))
 431                                 {
 432                                         send_to_user = false;
 433                                         break;
 434                                 }
 435                         }
 436                         if (send_to_user)
 437                         {
 438                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 439                         }
 440                 }
 441         }
 442         else if (flags == WM_OR)
 443         {
 444                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 445                 {
 446                         User* t = *i;
 447                         bool send_to_user = false;
 448
 449                         for (int n = 0; n < modelen; n++)
 450                         {
 451                                 if (t->IsModeSet(modes[n]))
 452                                 {
 453                                         send_to_user = true;
 454                                         break;
 455                                 }
 456                         }
 457
 458                         if (send_to_user)
 459                         {
 460                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 461                         }
 462                 }
 463         }
 464 }
 465
 466 /* return how many users have a given mode e.g. 'a' */
 467 int UserManager::ModeCount(const char mode)
 468 {
 469         ModeHandler* mh = this->ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 470
 471         if (mh)
 472                 return mh->GetCount();
 473         else
 474                 return 0;
 475 }