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", LOG_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", LOG_DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  63                 }
  64         }
  65
  66         ServerInstance->Logs->Log("USERS", LOG_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() + ServerInstance->Config->dns_timeout;
  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", LOG_DEBUG, "BanCache: Positive hit for " + New->GetIPString());
 118                         if (!ServerInstance->Config->MoronBanner.empty())
 119                                 New->WriteNotice("*** " +  ServerInstance->Config->MoronBanner);
 120                         this->QuitUser(New, b->Reason);
 121                         return;
 122                 }
 123                 else
 124                 {
 125                         ServerInstance->Logs->Log("BANCACHE", LOG_DEBUG, "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", LOG_DEBUG, "Internal error on new connection");
 145                 this->QuitUser(New, "Internal error handling connection");
 146         }
 147
 148         if (ServerInstance->Config->RawLog)
 149                 New->WriteNotice("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 150
 151         FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(New));
 152         if (New->quitting)
 153                 return;
 154
 155         FOREACH_MOD(I_OnUserInit,OnUserInit(New));
 156 }
 157
 158 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 159 {
 160         if (user->quitting)
 161         {
 162                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Tried to quit quitting user: " + user->nick);
 163                 return;
 164         }
 165
 166         if (IS_SERVER(user))
 167         {
 168                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Tried to quit server user: " + user->nick);
 169                 return;
 170         }
 171
 172         user->quitting = true;
 173
 174         ServerInstance->Logs->Log("USERS", LOG_DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 175         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 176
 177         std::string reason;
 178         std::string oper_reason;
 179         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 180         if (operreason && *operreason)
 181                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 182         else
 183                 oper_reason = quitreason;
 184
 185         ServerInstance->GlobalCulls.AddItem(user);
 186
 187         if (user->registered == REG_ALL)
 188         {
 189                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 190                 user->WriteCommonQuit(reason, oper_reason);
 191         }
 192
 193         if (user->registered != REG_ALL)
 194                 if (ServerInstance->Users->unregistered_count)
 195                         ServerInstance->Users->unregistered_count--;
 196
 197         if (IS_LOCAL(user))
 198         {
 199                 LocalUser* lu = IS_LOCAL(user);
 200                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 201                 lu->eh.Close();
 202         }
 203
 204         /*
 205          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 206          * if they were an oper with +s +qQ.
 207          */
 208         if (user->registered == REG_ALL)
 209         {
 210                 if (IS_LOCAL(user))
 211                 {
 212                         if (!user->quietquit)
 213                         {
 214                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s (%s) [%s]",
 215                                         user->GetFullRealHost().c_str(), user->GetIPString().c_str(), oper_reason.c_str());
 216                         }
 217                 }
 218                 else
 219                 {
 220                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 221                         {
 222                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s (%s) [%s]",
 223                                         user->server.c_str(), user->GetFullRealHost().c_str(), user->GetIPString().c_str(), oper_reason.c_str());
 224                         }
 225                 }
 226         }
 227
 228         user_hash::iterator iter = this->clientlist->find(user->nick);
 229
 230         if (iter != this->clientlist->end())
 231                 this->clientlist->erase(iter);
 232         else
 233                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Nick not found in clientlist, cannot remove: " + user->nick);
 234
 235         ServerInstance->Users->uuidlist->erase(user->uuid);
 236 }
 237
 238
 239 void UserManager::AddLocalClone(User *user)
 240 {
 241         local_clones[user->GetCIDRMask()]++;
 242 }
 243
 244 void UserManager::AddGlobalClone(User *user)
 245 {
 246         global_clones[user->GetCIDRMask()]++;
 247 }
 248
 249 void UserManager::RemoveCloneCounts(User *user)
 250 {
 251         if (IS_LOCAL(user))
 252         {
 253                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 254                 if (x != local_clones.end())
 255                 {
 256                         x->second--;
 257                         if (!x->second)
 258                         {
 259                                 local_clones.erase(x);
 260                         }
 261                 }
 262         }
 263
 264         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 265         if (y != global_clones.end())
 266         {
 267                 y->second--;
 268                 if (!y->second)
 269                 {
 270                         global_clones.erase(y);
 271                 }
 272         }
 273 }
 274
 275 unsigned long UserManager::GlobalCloneCount(User *user)
 276 {
 277         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 278         if (x != global_clones.end())
 279                 return x->second;
 280         else
 281                 return 0;
 282 }
 283
 284 unsigned long UserManager::LocalCloneCount(User *user)
 285 {
 286         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 287         if (x != local_clones.end())
 288                 return x->second;
 289         else
 290                 return 0;
 291 }
 292
 293 /* this function counts all users connected, wether they are registered or NOT. */
 294 unsigned int UserManager::UserCount()
 295 {
 296         /*
 297          * XXX: Todo:
 298          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 299          *      -- w00t
 300          */
 301         return this->clientlist->size();
 302 }
 303
 304 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 305 unsigned int UserManager::RegisteredUserCount()
 306 {
 307         return this->clientlist->size() - this->UnregisteredUserCount();
 308 }
 309
 310 /* return how many users are opered */
 311 unsigned int UserManager::OperCount()
 312 {
 313         return this->all_opers.size();
 314 }
 315
 316 /* return how many users are unregistered */
 317 unsigned int UserManager::UnregisteredUserCount()
 318 {
 319         return this->unregistered_count;
 320 }
 321
 322 /* return how many local registered users there are */
 323 unsigned int UserManager::LocalUserCount()
 324 {
 325         /* Doesnt count unregistered clients */
 326         return (this->local_count - this->UnregisteredUserCount());
 327 }
 328
 329 void UserManager::ServerNoticeAll(const char* text, ...)
 330 {
 331         std::string message;
 332         VAFORMAT(message, text, text);
 333         message = "NOTICE $" + ServerInstance->Config->ServerName + " :" + message;
 334
 335         for (LocalUserList::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 336         {
 337                 User* t = *i;
 338                 t->WriteServ(message);
 339         }
 340 }
 341
 342 /* return how many users have a given mode e.g. 'a' */
 343 int UserManager::ModeCount(const char mode)
 344 {
 345         int c = 0;
 346         for(user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
 347         {
 348                 User* u = i->second;
 349                 if (u->modes[mode-65])
 350                         c++;
 351         }
 352         return c;
 353 }
 354
 355 void UserManager::GarbageCollect()
 356 {
 357         // Reset the already_sent IDs so we don't wrap it around and drop a message
 358         LocalUser::already_sent_id = 0;
 359         for (LocalUserList::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
 360         {
 361                 (**i).already_sent = 0;
 362                 (**i).RemoveExpiredInvites();
 363         }
 364 }