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 monkeys 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 = New->uuid;
  67         (*(this->clientlist))[New->nick] = New;
  68
  69         New->registered = REG_NONE;
  70         New->signon = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
  71         New->lastping = 1;
  72
  73         ServerInstance->Users->AddLocalClone(New);
  74         ServerInstance->Users->AddGlobalClone(New);
  75
  76         New->localuseriter = this->local_users.insert(local_users.end(), New);
  77         local_count++;
  78
  79         if ((this->local_users.size() > ServerInstance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)ServerInstance->SE->GetMaxFds()))
  80         {
  81                 ServerInstance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", ServerInstance->Config->SoftLimit);
  82                 this->QuitUser(New,"No more connections allowed");
  83                 return;
  84         }
  85
  86         /*
  87          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  88          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  89          */
  90         New->SetClass();
  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         if (New->quitting)
  98                 return;
  99
 100         /*
 101          * even with bancache, we still have to keep User::exempt current.
 102          * besides that, if we get a positive bancache hit, we still won't fuck
 103          * them over if they are exempt. -- w00t
 104          */
 105         New->exempt = (ServerInstance->XLines->MatchesLine("E",New) != NULL);
 106
 107         if (BanCacheHit *b = ServerInstance->BanCache->GetHit(New->GetIPString()))
 108         {
 109                 if (!b->Type.empty() && !New->exempt)
 110                 {
 111                         /* user banned */
 112                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 113                         if (!ServerInstance->Config->MoronBanner.empty())
 114                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), ServerInstance->Config->MoronBanner.c_str());
 115                         this->QuitUser(New, b->Reason);
 116                         return;
 117                 }
 118                 else
 119                 {
 120                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 121                 }
 122         }
 123         else
 124         {
 125                 if (!New->exempt)
 126                 {
 127                         XLine* r = ServerInstance->XLines->MatchesLine("Z",New);
 128
 129                         if (r)
 130                         {
 131                                 r->Apply(New);
 132                                 return;
 133                         }
 134                 }
 135         }
 136
 137         if (!ServerInstance->SE->AddFd(eh, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE))
 138         {
 139                 ServerInstance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 140                 this->QuitUser(New, "Internal error handling connection");
 141         }
 142
 143         /* NOTE: even if dns lookups are *off*, we still need to display this.
 144          * BOPM and other stuff requires it.
 145          */
 146         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 147         if (ServerInstance->Config->RawLog)
 148                 New->WriteServ("NOTICE Auth :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 149
 150         FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(New));
 151         if (New->quitting)
 152                 return;
 153
 154         FOREACH_MOD(I_OnUserInit,OnUserInit(New));
 155
 156         if (ServerInstance->Config->NoUserDns)
 157         {
 158                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 159                 New->dns_done = true;
 160         }
 161         else
 162         {
 163                 New->StartDNSLookup();
 164         }
 165 }
 166
 167 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 168 {
 169         if (user->quitting)
 170         {
 171                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Tried to quit quitting user: " + user->nick);
 172                 return;
 173         }
 174
 175         if (IS_SERVER(user))
 176         {
 177                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Tried to quit server user: " + user->nick);
 178                 return;
 179         }
 180
 181         user->quitting = true;
 182
 183         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 184         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 185
 186         std::string reason;
 187         std::string oper_reason;
 188         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 189         if (operreason && *operreason)
 190                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 191         else
 192                 oper_reason = quitreason;
 193
 194         ServerInstance->GlobalCulls.AddItem(user);
 195
 196         if (user->registered == REG_ALL)
 197         {
 198                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 199                 user->WriteCommonQuit(reason, oper_reason);
 200         }
 201
 202         if (user->registered != REG_ALL)
 203                 if (ServerInstance->Users->unregistered_count)
 204                         ServerInstance->Users->unregistered_count--;
 205
 206         if (IS_LOCAL(user))
 207         {
 208                 LocalUser* lu = IS_LOCAL(user);
 209                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 210                 lu->eh.Close();
 211         }
 212
 213         /*
 214          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 215          * if they were an oper with +s +qQ.
 216          */
 217         if (user->registered == REG_ALL)
 218         {
 219                 if (IS_LOCAL(user))
 220                 {
 221                         if (!user->quietquit)
 222                         {
 223                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s (%s) [%s]",
 224                                         user->GetFullRealHost().c_str(), user->GetIPString(), oper_reason.c_str());
 225                         }
 226                 }
 227                 else
 228                 {
 229                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 230                         {
 231                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s (%s) [%s]",
 232                                         user->server.c_str(), user->GetFullRealHost().c_str(), user->GetIPString(), oper_reason.c_str());
 233                         }
 234                 }
 235                 user->AddToWhoWas();
 236         }
 237
 238         user_hash::iterator iter = this->clientlist->find(user->nick);
 239
 240         if (iter != this->clientlist->end())
 241                 this->clientlist->erase(iter);
 242         else
 243                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Nick not found in clientlist, cannot remove: " + user->nick);
 244
 245         ServerInstance->Users->uuidlist->erase(user->uuid);
 246 }
 247
 248
 249 void UserManager::AddLocalClone(User *user)
 250 {
 251         local_clones[user->GetCIDRMask()]++;
 252 }
 253
 254 void UserManager::AddGlobalClone(User *user)
 255 {
 256         global_clones[user->GetCIDRMask()]++;
 257 }
 258
 259 void UserManager::RemoveCloneCounts(User *user)
 260 {
 261         if (IS_LOCAL(user))
 262         {
 263                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 264                 if (x != local_clones.end())
 265                 {
 266                         x->second--;
 267                         if (!x->second)
 268                         {
 269                                 local_clones.erase(x);
 270                         }
 271                 }
 272         }
 273
 274         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 275         if (y != global_clones.end())
 276         {
 277                 y->second--;
 278                 if (!y->second)
 279                 {
 280                         global_clones.erase(y);
 281                 }
 282         }
 283 }
 284
 285 unsigned long UserManager::GlobalCloneCount(User *user)
 286 {
 287         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 288         if (x != global_clones.end())
 289                 return x->second;
 290         else
 291                 return 0;
 292 }
 293
 294 unsigned long UserManager::LocalCloneCount(User *user)
 295 {
 296         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 297         if (x != local_clones.end())
 298                 return x->second;
 299         else
 300                 return 0;
 301 }
 302
 303 /* this function counts all users connected, wether they are registered or NOT. */
 304 unsigned int UserManager::UserCount()
 305 {
 306         /*
 307          * XXX: Todo:
 308          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 309          *      -- w00t
 310          */
 311         return this->clientlist->size();
 312 }
 313
 314 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 315 unsigned int UserManager::RegisteredUserCount()
 316 {
 317         return this->clientlist->size() - this->UnregisteredUserCount();
 318 }
 319
 320 /* return how many users are opered */
 321 unsigned int UserManager::OperCount()
 322 {
 323         return this->all_opers.size();
 324 }
 325
 326 /* return how many users are unregistered */
 327 unsigned int UserManager::UnregisteredUserCount()
 328 {
 329         return this->unregistered_count;
 330 }
 331
 332 /* return how many local registered users there are */
 333 unsigned int UserManager::LocalUserCount()
 334 {
 335         /* Doesnt count unregistered clients */
 336         return (this->local_count - this->UnregisteredUserCount());
 337 }
 338
 339 void UserManager::ServerNoticeAll(const char* text, ...)
 340 {
 341         if (!text)
 342                 return;
 343
 344         char textbuffer[MAXBUF];
 345         char formatbuffer[MAXBUF];
 346         va_list argsPtr;
 347         va_start (argsPtr, text);
 348         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 349         va_end(argsPtr);
 350
 351         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 352
 353         for (LocalUserList::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 354         {
 355                 User* t = *i;
 356                 t->WriteServ(std::string(formatbuffer));
 357         }
 358 }
 359
 360 void UserManager::ServerPrivmsgAll(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,"PRIVMSG $%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
 382 /* return how many users have a given mode e.g. 'a' */
 383 int UserManager::ModeCount(const char mode)
 384 {
 385         int c = 0;
 386         for(user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
 387         {
 388                 User* u = i->second;
 389                 if (u->modes[mode-65])
 390                         c++;
 391         }
 392         return c;
 393 }