src/usermanager.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2008 Dennis Friis <peavey@inspircd.org>
   6  *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
   7  *   Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
   8  *
   9  * This file is part of InspIRCd.  InspIRCd is free software: you can
  10  * redistribute it and/or modify it under the terms of the GNU General Public
  11  * License as published by the Free Software Foundation, version 2.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  15  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22
  23 #include "inspircd.h"
  24 #include "xline.h"
  25 #include "bancache.h"
  26
  27 /* add a client connection to the sockets list */
  28 void UserManager::AddUser(int socket, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
  29 {
  30         /* NOTE: Calling this one parameter constructor for User automatically
  31          * allocates a new UUID and places it in the hash_map.
  32          */
  33         LocalUser* New = NULL;
  34         try
  35         {
  36                 New = new LocalUser(socket, client, server);
  37         }
  38         catch (...)
  39         {
  40                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
  41                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING *** Duplicate UUID allocated!");
  42                 return;
  43         }
  44         UserIOHandler* eh = &New->eh;
  45
  46         /* Give each of the modules an attempt to hook the user for I/O */
  47         FOREACH_MOD(I_OnHookIO, OnHookIO(eh, via));
  48
  49         if (eh->GetIOHook())
  50         {
  51                 try
  52                 {
  53                         eh->GetIOHook()->OnStreamSocketAccept(eh, client, server);
  54                 }
  55                 catch (CoreException& modexcept)
  56                 {
  57                         ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  58                 }
  59         }
  60
  61         ServerInstance->Logs->Log("USERS", DEBUG,"New user fd: %d", socket);
  62
  63         this->unregistered_count++;
  64
  65         /* The users default nick is their UUID */
  66         New->nick.assign(New->uuid, 0, ServerInstance->Config->Limits.NickMax);
  67         (*(this->clientlist))[New->nick] = New;
  68
  69         New->ident.assign("unknown");
  70
  71         New->registered = REG_NONE;
  72         New->signon = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
  73         New->lastping = 1;
  74
  75         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
  76         New->dhost.assign(New->GetIPString(), 0, 64);
  77         New->host.assign(New->GetIPString(), 0, 64);
  78
  79         ServerInstance->Users->AddLocalClone(New);
  80         ServerInstance->Users->AddGlobalClone(New);
  81
  82         this->local_users.push_back(New);
  83
  84         if ((this->local_users.size() > ServerInstance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)ServerInstance->SE->GetMaxFds()))
  85         {
  86                 ServerInstance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", ServerInstance->Config->SoftLimit);
  87                 this->QuitUser(New,"No more connections allowed");
  88                 return;
  89         }
  90
  91         /*
  92          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  93          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  94          */
  95         New->SetClass();
  96
  97         /*
  98          * Check connect class settings and initialise settings into User.
  99          * This will be done again after DNS resolution. -- w00t
 100          */
 101         New->CheckClass();
 102         if (New->quitting)
 103                 return;
 104
 105         /*
 106          * even with bancache, we still have to keep User::exempt current.
 107          * besides that, if we get a positive bancache hit, we still won't fuck
 108          * them over if they are exempt. -- w00t
 109          */
 110         New->exempt = (ServerInstance->XLines->MatchesLine("E",New) != NULL);
 111
 112         if (BanCacheHit *b = ServerInstance->BanCache->GetHit(New->GetIPString()))
 113         {
 114                 if (!b->Type.empty() && !New->exempt)
 115                 {
 116                         /* user banned */
 117                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 118                         if (!ServerInstance->Config->MoronBanner.empty())
 119                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), ServerInstance->Config->MoronBanner.c_str());
 120                         this->QuitUser(New, b->Reason);
 121                         return;
 122                 }
 123                 else
 124                 {
 125                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 126                 }
 127         }
 128         else
 129         {
 130                 if (!New->exempt)
 131                 {
 132                         XLine* r = ServerInstance->XLines->MatchesLine("Z",New);
 133
 134                         if (r)
 135                         {
 136                                 r->Apply(New);
 137                                 return;
 138                         }
 139                 }
 140         }
 141
 142         if (!ServerInstance->SE->AddFd(eh, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE))
 143         {
 144                 ServerInstance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 145                 this->QuitUser(New, "Internal error handling connection");
 146         }
 147
 148         /* NOTE: even if dns lookups are *off*, we still need to display this.
 149          * BOPM and other stuff requires it.
 150          */
 151         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 152         if (ServerInstance->Config->RawLog)
 153                 New->WriteServ("NOTICE Auth :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 154
 155         FOREACH_MOD(I_OnUserInit,OnUserInit(New));
 156
 157         if (ServerInstance->Config->NoUserDns)
 158         {
 159                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 160                 New->dns_done = true;
 161         }
 162         else
 163         {
 164                 New->StartDNSLookup();
 165         }
 166 }
 167
 168 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 169 {
 170         if (user->quitting)
 171         {
 172                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 173                 return;
 174         }
 175
 176         if (IS_SERVER(user))
 177         {
 178                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a fake user (%s)", user->nick.c_str());
 179                 return;
 180         }
 181
 182         user->quitting = true;
 183
 184         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 185         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 186
 187         std::string reason;
 188         std::string oper_reason;
 189         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 190         if (operreason && *operreason)
 191                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 192         else
 193                 oper_reason = quitreason;
 194
 195         ServerInstance->GlobalCulls.AddItem(user);
 196
 197         if (user->registered == REG_ALL)
 198         {
 199                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 200                 user->WriteCommonQuit(reason, oper_reason);
 201         }
 202
 203         if (user->registered != REG_ALL)
 204                 if (ServerInstance->Users->unregistered_count)
 205                         ServerInstance->Users->unregistered_count--;
 206
 207         if (IS_LOCAL(user))
 208         {
 209                 LocalUser* lu = IS_LOCAL(user);
 210                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 211                 lu->eh.Close();
 212         }
 213
 214         /*
 215          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 216          * if they were an oper with +s +qQ.
 217          */
 218         if (user->registered == REG_ALL)
 219         {
 220                 if (IS_LOCAL(user))
 221                 {
 222                         if (!user->quietquit)
 223                         {
 224                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s (%s) [%s]",
 225                                         user->nick.c_str(), user->ident.c_str(), user->host.c_str(), user->GetIPString(), oper_reason.c_str());
 226                         }
 227                 }
 228                 else
 229                 {
 230                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 231                         {
 232                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s (%s) [%s]",
 233                                         user->server.c_str(), user->nick.c_str(), user->ident.c_str(), user->host.c_str(), user->GetIPString(), oper_reason.c_str());
 234                         }
 235                 }
 236                 user->AddToWhoWas();
 237         }
 238
 239         user_hash::iterator iter = this->clientlist->find(user->nick);
 240
 241         if (iter != this->clientlist->end())
 242                 this->clientlist->erase(iter);
 243         else
 244                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 245
 246         ServerInstance->Users->uuidlist->erase(user->uuid);
 247 }
 248
 249
 250 void UserManager::AddLocalClone(User *user)
 251 {
 252         clonemap::iterator x;
 253         x = local_clones.find(user->GetCIDRMask());
 254         if (x != local_clones.end())
 255                 x->second++;
 256         else
 257                 local_clones[user->GetCIDRMask()] = 1;
 258 }
 259
 260 void UserManager::AddGlobalClone(User *user)
 261 {
 262         clonemap::iterator x;
 263
 264         x = global_clones.find(user->GetCIDRMask());
 265         if (x != global_clones.end())
 266                 x->second++;
 267         else
 268                 global_clones[user->GetCIDRMask()] = 1;
 269 }
 270
 271 void UserManager::RemoveCloneCounts(User *user)
 272 {
 273         if (IS_LOCAL(user))
 274         {
 275                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 276                 if (x != local_clones.end())
 277                 {
 278                         x->second--;
 279                         if (!x->second)
 280                         {
 281                                 local_clones.erase(x);
 282                         }
 283                 }
 284         }
 285
 286         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 287         if (y != global_clones.end())
 288         {
 289                 y->second--;
 290                 if (!y->second)
 291                 {
 292                         global_clones.erase(y);
 293                 }
 294         }
 295 }
 296
 297 unsigned long UserManager::GlobalCloneCount(User *user)
 298 {
 299         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 300         if (x != global_clones.end())
 301                 return x->second;
 302         else
 303                 return 0;
 304 }
 305
 306 unsigned long UserManager::LocalCloneCount(User *user)
 307 {
 308         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 309         if (x != local_clones.end())
 310                 return x->second;
 311         else
 312                 return 0;
 313 }
 314
 315 /* this function counts all users connected, wether they are registered or NOT. */
 316 unsigned int UserManager::UserCount()
 317 {
 318         /*
 319          * XXX: Todo:
 320          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 321          *      -- w00t
 322          */
 323         return this->clientlist->size();
 324 }
 325
 326 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 327 unsigned int UserManager::RegisteredUserCount()
 328 {
 329         return this->clientlist->size() - this->UnregisteredUserCount();
 330 }
 331
 332 /* return how many users are opered */
 333 unsigned int UserManager::OperCount()
 334 {
 335         return this->all_opers.size();
 336 }
 337
 338 /* return how many users are unregistered */
 339 unsigned int UserManager::UnregisteredUserCount()
 340 {
 341         return this->unregistered_count;
 342 }
 343
 344 /* return how many local registered users there are */
 345 unsigned int UserManager::LocalUserCount()
 346 {
 347         /* Doesnt count unregistered clients */
 348         return (this->local_users.size() - this->UnregisteredUserCount());
 349 }
 350
 351 void UserManager::ServerNoticeAll(const char* text, ...)
 352 {
 353         if (!text)
 354                 return;
 355
 356         char textbuffer[MAXBUF];
 357         char formatbuffer[MAXBUF];
 358         va_list argsPtr;
 359         va_start (argsPtr, text);
 360         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 361         va_end(argsPtr);
 362
 363         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 364
 365         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 366         {
 367                 User* t = *i;
 368                 t->WriteServ(std::string(formatbuffer));
 369         }
 370 }
 371
 372 void UserManager::ServerPrivmsgAll(const char* text, ...)
 373 {
 374         if (!text)
 375                 return;
 376
 377         char textbuffer[MAXBUF];
 378         char formatbuffer[MAXBUF];
 379         va_list argsPtr;
 380         va_start (argsPtr, text);
 381         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 382         va_end(argsPtr);
 383
 384         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 385
 386         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 387         {
 388                 User* t = *i;
 389                 t->WriteServ(std::string(formatbuffer));
 390         }
 391 }
 392
 393
 394 /* return how many users have a given mode e.g. 'a' */
 395 int UserManager::ModeCount(const char mode)
 396 {
 397         int c = 0;
 398         for(user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
 399         {
 400                 User* u = i->second;
 401                 if (u->modes[mode-65])
 402                         c++;
 403         }
 404         return c;
 405 }