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 UserManager::UserManager()
  28         : unregistered_count(0), local_count(0)
  29 {
  30 }
  31
  32 /* add a client connection to the sockets list */
  33 void UserManager::AddUser(int socket, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
  34 {
  35         /* NOTE: Calling this one parameter constructor for User automatically
  36          * allocates a new UUID and places it in the hash_map.
  37          */
  38         LocalUser* New = NULL;
  39         try
  40         {
  41                 New = new LocalUser(socket, client, server);
  42         }
  43         catch (...)
  44         {
  45                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkeys have been unleashed.");
  46                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING *** Duplicate UUID allocated!");
  47                 return;
  48         }
  49         UserIOHandler* eh = &New->eh;
  50
  51         /* Give each of the modules an attempt to hook the user for I/O */
  52         FOREACH_MOD(I_OnHookIO, OnHookIO(eh, via));
  53
  54         if (eh->GetIOHook())
  55         {
  56                 try
  57                 {
  58                         eh->GetIOHook()->OnStreamSocketAccept(eh, client, server);
  59                 }
  60                 catch (CoreException& modexcept)
  61                 {
  62                         ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  63                 }
  64         }
  65
  66         ServerInstance->Logs->Log("USERS", DEBUG,"New user fd: %d", socket);
  67
  68         this->unregistered_count++;
  69
  70         /* The users default nick is their UUID */
  71         New->nick = New->uuid;
  72         (*(this->clientlist))[New->nick] = New;
  73
  74         New->registered = REG_NONE;
  75         New->signon = ServerInstance->Time();
  76         New->lastping = 1;
  77
  78         ServerInstance->Users->AddLocalClone(New);
  79         ServerInstance->Users->AddGlobalClone(New);
  80
  81         New->localuseriter = this->local_users.insert(local_users.end(), New);
  82         local_count++;
  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_OnSetUserIP,OnSetUserIP(New));
 156         if (New->quitting)
 157                 return;
 158
 159         FOREACH_MOD(I_OnUserInit,OnUserInit(New));
 160
 161         if (ServerInstance->Config->NoUserDns)
 162         {
 163                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 164                 New->dns_done = true;
 165         }
 166         else
 167         {
 168                 New->StartDNSLookup();
 169         }
 170 }
 171
 172 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 173 {
 174         if (user->quitting)
 175         {
 176                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Tried to quit quitting user: " + user->nick);
 177                 return;
 178         }
 179
 180         if (IS_SERVER(user))
 181         {
 182                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Tried to quit server user: " + user->nick);
 183                 return;
 184         }
 185
 186         user->quitting = true;
 187
 188         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), 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_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 204                 user->WriteCommonQuit(reason, oper_reason);
 205         }
 206
 207         if (user->registered != REG_ALL)
 208                 if (ServerInstance->Users->unregistered_count)
 209                         ServerInstance->Users->unregistered_count--;
 210
 211         if (IS_LOCAL(user))
 212         {
 213                 LocalUser* lu = IS_LOCAL(user);
 214                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 215                 lu->eh.Close();
 216         }
 217
 218         /*
 219          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 220          * if they were an oper with +s +qQ.
 221          */
 222         if (user->registered == REG_ALL)
 223         {
 224                 if (IS_LOCAL(user))
 225                 {
 226                         if (!user->quietquit)
 227                         {
 228                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s (%s) [%s]",
 229                                         user->GetFullRealHost().c_str(), user->GetIPString(), oper_reason.c_str());
 230                         }
 231                 }
 232                 else
 233                 {
 234                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 235                         {
 236                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s (%s) [%s]",
 237                                         user->server.c_str(), user->GetFullRealHost().c_str(), user->GetIPString(), oper_reason.c_str());
 238                         }
 239                 }
 240                 user->AddToWhoWas();
 241         }
 242
 243         user_hash::iterator iter = this->clientlist->find(user->nick);
 244
 245         if (iter != this->clientlist->end())
 246                 this->clientlist->erase(iter);
 247         else
 248                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Nick not found in clientlist, cannot remove: " + user->nick);
 249
 250         ServerInstance->Users->uuidlist->erase(user->uuid);
 251 }
 252
 253
 254 void UserManager::AddLocalClone(User *user)
 255 {
 256         local_clones[user->GetCIDRMask()]++;
 257 }
 258
 259 void UserManager::AddGlobalClone(User *user)
 260 {
 261         global_clones[user->GetCIDRMask()]++;
 262 }
 263
 264 void UserManager::RemoveCloneCounts(User *user)
 265 {
 266         if (IS_LOCAL(user))
 267         {
 268                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 269                 if (x != local_clones.end())
 270                 {
 271                         x->second--;
 272                         if (!x->second)
 273                         {
 274                                 local_clones.erase(x);
 275                         }
 276                 }
 277         }
 278
 279         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 280         if (y != global_clones.end())
 281         {
 282                 y->second--;
 283                 if (!y->second)
 284                 {
 285                         global_clones.erase(y);
 286                 }
 287         }
 288 }
 289
 290 void UserManager::RehashCloneCounts()
 291 {
 292         local_clones.clear();
 293         global_clones.clear();
 294
 295         const user_hash& hash = *ServerInstance->Users->clientlist;
 296         for (user_hash::const_iterator i = hash.begin(); i != hash.end(); ++i)
 297         {
 298                 User* u = i->second;
 299
 300                 if (IS_LOCAL(u))
 301                         AddLocalClone(u);
 302                 AddGlobalClone(u);
 303         }
 304 }
 305
 306 unsigned long UserManager::GlobalCloneCount(User *user)
 307 {
 308         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 309         if (x != global_clones.end())
 310                 return x->second;
 311         else
 312                 return 0;
 313 }
 314
 315 unsigned long UserManager::LocalCloneCount(User *user)
 316 {
 317         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 318         if (x != local_clones.end())
 319                 return x->second;
 320         else
 321                 return 0;
 322 }
 323
 324 /* this function counts all users connected, wether they are registered or NOT. */
 325 unsigned int UserManager::UserCount()
 326 {
 327         /*
 328          * XXX: Todo:
 329          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 330          *      -- w00t
 331          */
 332         return this->clientlist->size();
 333 }
 334
 335 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 336 unsigned int UserManager::RegisteredUserCount()
 337 {
 338         return this->clientlist->size() - this->UnregisteredUserCount();
 339 }
 340
 341 /* return how many users are opered */
 342 unsigned int UserManager::OperCount()
 343 {
 344         return this->all_opers.size();
 345 }
 346
 347 /* return how many users are unregistered */
 348 unsigned int UserManager::UnregisteredUserCount()
 349 {
 350         return this->unregistered_count;
 351 }
 352
 353 /* return how many local registered users there are */
 354 unsigned int UserManager::LocalUserCount()
 355 {
 356         /* Doesnt count unregistered clients */
 357         return (this->local_count - this->UnregisteredUserCount());
 358 }
 359
 360 void UserManager::ServerNoticeAll(const char* text, ...)
 361 {
 362         if (!text)
 363                 return;
 364
 365         char textbuffer[MAXBUF];
 366         char formatbuffer[MAXBUF];
 367         va_list argsPtr;
 368         va_start (argsPtr, text);
 369         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 370         va_end(argsPtr);
 371
 372         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 373
 374         for (LocalUserList::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 375         {
 376                 User* t = *i;
 377                 t->WriteServ(std::string(formatbuffer));
 378         }
 379 }
 380
 381 void UserManager::ServerPrivmsgAll(const char* text, ...)
 382 {
 383         if (!text)
 384                 return;
 385
 386         char textbuffer[MAXBUF];
 387         char formatbuffer[MAXBUF];
 388         va_list argsPtr;
 389         va_start (argsPtr, text);
 390         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 391         va_end(argsPtr);
 392
 393         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 394
 395         for (LocalUserList::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 396         {
 397                 User* t = *i;
 398                 t->WriteServ(std::string(formatbuffer));
 399         }
 400 }
 401
 402
 403 /* return how many users have a given mode e.g. 'a' */
 404 int UserManager::ModeCount(const char mode)
 405 {
 406         int c = 0;
 407         for(user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
 408         {
 409                 User* u = i->second;
 410                 if (u->modes[mode-65])
 411                         c++;
 412         }
 413         return c;
 414 }