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
 121                         if (ServerInstance->Config->HideBans)
 122                                 this->QuitUser(New, b->Type + "-Lined", b->Reason.c_str());
 123                         else
 124                                 this->QuitUser(New, b->Reason);
 125                         return;
 126                 }
 127                 else
 128                 {
 129                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 130                 }
 131         }
 132         else
 133         {
 134                 if (!New->exempt)
 135                 {
 136                         XLine* r = ServerInstance->XLines->MatchesLine("Z",New);
 137
 138                         if (r)
 139                         {
 140                                 r->Apply(New);
 141                                 return;
 142                         }
 143                 }
 144         }
 145
 146         if (!ServerInstance->SE->AddFd(eh, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE))
 147         {
 148                 ServerInstance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 149                 this->QuitUser(New, "Internal error handling connection");
 150                 return;
 151         }
 152
 153         /* NOTE: even if dns lookups are *off*, we still need to display this.
 154          * BOPM and other stuff requires it.
 155          */
 156         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 157         if (ServerInstance->Config->RawLog)
 158                 New->WriteServ("NOTICE Auth :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 159
 160         FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(New));
 161         if (New->quitting)
 162                 return;
 163
 164         FOREACH_MOD(I_OnUserInit,OnUserInit(New));
 165
 166         if (ServerInstance->Config->NoUserDns)
 167         {
 168                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 169                 New->dns_done = true;
 170         }
 171         else
 172         {
 173                 New->StartDNSLookup();
 174         }
 175 }
 176
 177 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 178 {
 179         if (user->quitting)
 180         {
 181                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Tried to quit quitting user: " + user->nick);
 182                 return;
 183         }
 184
 185         if (IS_SERVER(user))
 186         {
 187                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Tried to quit server user: " + user->nick);
 188                 return;
 189         }
 190
 191         user->quitting = true;
 192
 193         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 194         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 195
 196         std::string reason;
 197         std::string oper_reason;
 198         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 199         if (operreason && *operreason)
 200                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 201         else
 202                 oper_reason = quitreason;
 203
 204         ServerInstance->GlobalCulls.AddItem(user);
 205
 206         if (user->registered == REG_ALL)
 207         {
 208                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 209                 user->WriteCommonQuit(reason, oper_reason);
 210         }
 211
 212         if (user->registered != REG_ALL)
 213                 if (ServerInstance->Users->unregistered_count)
 214                         ServerInstance->Users->unregistered_count--;
 215
 216         if (IS_LOCAL(user))
 217         {
 218                 LocalUser* lu = IS_LOCAL(user);
 219                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 220                 lu->eh.Close();
 221         }
 222
 223         /*
 224          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 225          * if they were an oper with +s +qQ.
 226          */
 227         if (user->registered == REG_ALL)
 228         {
 229                 if (IS_LOCAL(user))
 230                 {
 231                         if (!user->quietquit)
 232                         {
 233                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s (%s) [%s]",
 234                                         user->GetFullRealHost().c_str(), user->GetIPString(), oper_reason.c_str());
 235                         }
 236                 }
 237                 else
 238                 {
 239                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 240                         {
 241                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s (%s) [%s]",
 242                                         user->server.c_str(), user->GetFullRealHost().c_str(), user->GetIPString(), oper_reason.c_str());
 243                         }
 244                 }
 245                 user->AddToWhoWas();
 246         }
 247
 248         user_hash::iterator iter = this->clientlist->find(user->nick);
 249
 250         if (iter != this->clientlist->end())
 251                 this->clientlist->erase(iter);
 252         else
 253                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Nick not found in clientlist, cannot remove: " + user->nick);
 254
 255         ServerInstance->Users->uuidlist->erase(user->uuid);
 256 }
 257
 258
 259 void UserManager::AddLocalClone(User *user)
 260 {
 261         local_clones[user->GetCIDRMask()]++;
 262 }
 263
 264 void UserManager::AddGlobalClone(User *user)
 265 {
 266         global_clones[user->GetCIDRMask()]++;
 267 }
 268
 269 void UserManager::RemoveCloneCounts(User *user)
 270 {
 271         if (IS_LOCAL(user))
 272         {
 273                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 274                 if (x != local_clones.end())
 275                 {
 276                         x->second--;
 277                         if (!x->second)
 278                         {
 279                                 local_clones.erase(x);
 280                         }
 281                 }
 282         }
 283
 284         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 285         if (y != global_clones.end())
 286         {
 287                 y->second--;
 288                 if (!y->second)
 289                 {
 290                         global_clones.erase(y);
 291                 }
 292         }
 293 }
 294
 295 void UserManager::RehashCloneCounts()
 296 {
 297         local_clones.clear();
 298         global_clones.clear();
 299
 300         const user_hash& hash = *ServerInstance->Users->clientlist;
 301         for (user_hash::const_iterator i = hash.begin(); i != hash.end(); ++i)
 302         {
 303                 User* u = i->second;
 304
 305                 if (IS_LOCAL(u))
 306                         AddLocalClone(u);
 307                 AddGlobalClone(u);
 308         }
 309 }
 310
 311 unsigned long UserManager::GlobalCloneCount(User *user)
 312 {
 313         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 314         if (x != global_clones.end())
 315                 return x->second;
 316         else
 317                 return 0;
 318 }
 319
 320 unsigned long UserManager::LocalCloneCount(User *user)
 321 {
 322         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 323         if (x != local_clones.end())
 324                 return x->second;
 325         else
 326                 return 0;
 327 }
 328
 329 /* this function counts all users connected, wether they are registered or NOT. */
 330 unsigned int UserManager::UserCount()
 331 {
 332         /*
 333          * XXX: Todo:
 334          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 335          *      -- w00t
 336          */
 337         return this->clientlist->size();
 338 }
 339
 340 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 341 unsigned int UserManager::RegisteredUserCount()
 342 {
 343         return this->clientlist->size() - this->UnregisteredUserCount();
 344 }
 345
 346 /* return how many users are opered */
 347 unsigned int UserManager::OperCount()
 348 {
 349         return this->all_opers.size();
 350 }
 351
 352 /* return how many users are unregistered */
 353 unsigned int UserManager::UnregisteredUserCount()
 354 {
 355         return this->unregistered_count;
 356 }
 357
 358 /* return how many local registered users there are */
 359 unsigned int UserManager::LocalUserCount()
 360 {
 361         /* Doesnt count unregistered clients */
 362         return (this->local_count - this->UnregisteredUserCount());
 363 }
 364
 365 void UserManager::ServerNoticeAll(const char* text, ...)
 366 {
 367         if (!text)
 368                 return;
 369
 370         char textbuffer[MAXBUF];
 371         char formatbuffer[MAXBUF];
 372         va_list argsPtr;
 373         va_start (argsPtr, text);
 374         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 375         va_end(argsPtr);
 376
 377         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 378
 379         for (LocalUserList::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 380         {
 381                 User* t = *i;
 382                 t->WriteServ(std::string(formatbuffer));
 383         }
 384 }
 385
 386 void UserManager::ServerPrivmsgAll(const char* text, ...)
 387 {
 388         if (!text)
 389                 return;
 390
 391         char textbuffer[MAXBUF];
 392         char formatbuffer[MAXBUF];
 393         va_list argsPtr;
 394         va_start (argsPtr, text);
 395         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 396         va_end(argsPtr);
 397
 398         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 399
 400         for (LocalUserList::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 401         {
 402                 User* t = *i;
 403                 t->WriteServ(std::string(formatbuffer));
 404         }
 405 }
 406
 407
 408 /* return how many users have a given mode e.g. 'a' */
 409 int UserManager::ModeCount(const char mode)
 410 {
 411         int c = 0;
 412         for(user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
 413         {
 414                 User* u = i->second;
 415                 if (u->modes[mode-65])
 416                         c++;
 417         }
 418         return c;
 419 }