src/usermanager.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *          the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "xline.h"
  16 #include "bancache.h"
  17
  18 /* add a client connection to the sockets list */
  19 void UserManager::AddUser(int socket, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
  20 {
  21         /* NOTE: Calling this one parameter constructor for User automatically
  22          * allocates a new UUID and places it in the hash_map.
  23          */
  24         LocalUser* New = NULL;
  25         try
  26         {
  27                 New = new LocalUser(socket, client, server);
  28         }
  29         catch (...)
  30         {
  31                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
  32                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING *** Duplicate UUID allocated!");
  33                 return;
  34         }
  35
  36         /* Give each of the modules an attempt to hook the user for I/O */
  37         FOREACH_MOD(I_OnHookIO, OnHookIO(New, via));
  38
  39         if (New->GetIOHook())
  40         {
  41                 try
  42                 {
  43                         New->GetIOHook()->OnStreamSocketAccept(New, client, server);
  44                 }
  45                 catch (CoreException& modexcept)
  46                 {
  47                         ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  48                 }
  49         }
  50
  51         ServerInstance->Logs->Log("USERS", DEBUG,"New user fd: %d", socket);
  52
  53         this->unregistered_count++;
  54
  55         /* The users default nick is their UUID */
  56         New->nick.assign(New->uuid, 0, ServerInstance->Config->Limits.NickMax);
  57         (*(this->clientlist))[New->nick] = New;
  58
  59         New->ident.assign("unknown");
  60
  61         New->registered = REG_NONE;
  62         New->signon = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
  63         New->lastping = 1;
  64
  65         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
  66         New->dhost.assign(New->GetIPString(), 0, 64);
  67         New->host.assign(New->GetIPString(), 0, 64);
  68
  69         ServerInstance->Users->AddLocalClone(New);
  70         ServerInstance->Users->AddGlobalClone(New);
  71
  72         /*
  73          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  74          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  75          */
  76         New->SetClass();
  77
  78         /*
  79          * Check connect class settings and initialise settings into User.
  80          * This will be done again after DNS resolution. -- w00t
  81          */
  82         New->CheckClass();
  83
  84         this->local_users.push_back(New);
  85
  86         if ((this->local_users.size() > ServerInstance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)ServerInstance->SE->GetMaxFds()))
  87         {
  88                 ServerInstance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", ServerInstance->Config->SoftLimit);
  89                 this->QuitUser(New,"No more connections allowed");
  90                 return;
  91         }
  92
  93         /*
  94          * even with bancache, we still have to keep User::exempt current.
  95          * besides that, if we get a positive bancache hit, we still won't fuck
  96          * them over if they are exempt. -- w00t
  97          */
  98         New->exempt = (ServerInstance->XLines->MatchesLine("E",New) != NULL);
  99
 100         if (BanCacheHit *b = ServerInstance->BanCache->GetHit(New->GetIPString()))
 101         {
 102                 if (!b->Type.empty() && !New->exempt)
 103                 {
 104                         /* user banned */
 105                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 106                         if (!ServerInstance->Config->MoronBanner.empty())
 107                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), ServerInstance->Config->MoronBanner.c_str());
 108                         this->QuitUser(New, b->Reason);
 109                         return;
 110                 }
 111                 else
 112                 {
 113                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 114                 }
 115         }
 116         else
 117         {
 118                 if (!New->exempt)
 119                 {
 120                         XLine* r = ServerInstance->XLines->MatchesLine("Z",New);
 121
 122                         if (r)
 123                         {
 124                                 r->Apply(New);
 125                                 return;
 126                         }
 127                 }
 128         }
 129
 130         if (!ServerInstance->SE->AddFd(New, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE))
 131         {
 132                 ServerInstance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 133                 this->QuitUser(New, "Internal error handling connection");
 134         }
 135
 136         /* NOTE: even if dns lookups are *off*, we still need to display this.
 137          * BOPM and other stuff requires it.
 138          */
 139         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 140
 141         if (ServerInstance->Config->NoUserDns)
 142         {
 143                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 144                 New->dns_done = true;
 145         }
 146         else
 147         {
 148                 New->StartDNSLookup();
 149         }
 150 }
 151
 152 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 153 {
 154         if (user->quitting)
 155         {
 156                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 157                 return;
 158         }
 159
 160         if (IS_SERVER(user))
 161         {
 162                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a fake user (%s)", user->nick.c_str());
 163                 return;
 164         }
 165
 166         user->quitting = true;
 167
 168         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 169         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 170
 171         std::string reason;
 172         std::string oper_reason;
 173         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 174         if (operreason && *operreason)
 175                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 176         else
 177                 oper_reason = quitreason;
 178
 179         ServerInstance->GlobalCulls.AddItem(user);
 180
 181         if (user->registered == REG_ALL)
 182         {
 183                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 184                 user->WriteCommonQuit(reason, oper_reason);
 185         }
 186
 187         if (user->registered != REG_ALL)
 188                 if (ServerInstance->Users->unregistered_count)
 189                         ServerInstance->Users->unregistered_count--;
 190
 191         if (IS_LOCAL(user))
 192         {
 193                 LocalUser* lu = IS_LOCAL(user);
 194                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 195                 lu->DoWrite();
 196                 if (lu->GetIOHook())
 197                 {
 198                         try
 199                         {
 200                                 lu->GetIOHook()->OnStreamSocketClose(lu);
 201                         }
 202                         catch (CoreException& modexcept)
 203                         {
 204                                 ServerInstance->Logs->Log("USERS",DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 205                         }
 206                 }
 207
 208                 ServerInstance->SE->DelFd(lu);
 209                 lu->Close();
 210         }
 211
 212         /*
 213          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 214          * if they were an oper with +sn +qQ.
 215          */
 216         if (user->registered == REG_ALL)
 217         {
 218                 if (IS_LOCAL(user))
 219                 {
 220                         if (!user->quietquit)
 221                         {
 222                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s [%s] (%s)",
 223                                         user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str(), user->GetIPString());
 224                         }
 225                 }
 226                 else
 227                 {
 228                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 229                         {
 230                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s [%s] (%s)",
 231                                         user->server.c_str(), user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str(), user->GetIPString());
 232                         }
 233                 }
 234                 user->AddToWhoWas();
 235         }
 236
 237         user_hash::iterator iter = this->clientlist->find(user->nick);
 238
 239         if (iter != this->clientlist->end())
 240                 this->clientlist->erase(iter);
 241         else
 242                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 243 }
 244
 245
 246 void UserManager::AddLocalClone(User *user)
 247 {
 248         clonemap::iterator x;
 249         x = local_clones.find(user->GetCIDRMask());
 250         if (x != local_clones.end())
 251                 x->second++;
 252         else
 253                 local_clones[user->GetCIDRMask()] = 1;
 254 }
 255
 256 void UserManager::AddGlobalClone(User *user)
 257 {
 258         clonemap::iterator x;
 259
 260         x = global_clones.find(user->GetCIDRMask());
 261         if (x != global_clones.end())
 262                 x->second++;
 263         else
 264                 global_clones[user->GetCIDRMask()] = 1;
 265 }
 266
 267 void UserManager::RemoveCloneCounts(User *user)
 268 {
 269         if (IS_LOCAL(user))
 270         {
 271                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 272                 if (x != local_clones.end())
 273                 {
 274                         x->second--;
 275                         if (!x->second)
 276                         {
 277                                 local_clones.erase(x);
 278                         }
 279                 }
 280         }
 281
 282         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 283         if (y != global_clones.end())
 284         {
 285                 y->second--;
 286                 if (!y->second)
 287                 {
 288                         global_clones.erase(y);
 289                 }
 290         }
 291 }
 292
 293 unsigned long UserManager::GlobalCloneCount(User *user)
 294 {
 295         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 296         if (x != global_clones.end())
 297                 return x->second;
 298         else
 299                 return 0;
 300 }
 301
 302 unsigned long UserManager::LocalCloneCount(User *user)
 303 {
 304         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 305         if (x != local_clones.end())
 306                 return x->second;
 307         else
 308                 return 0;
 309 }
 310
 311 /* this function counts all users connected, wether they are registered or NOT. */
 312 unsigned int UserManager::UserCount()
 313 {
 314         /*
 315          * XXX: Todo:
 316          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 317          *      -- w00t
 318          */
 319         return this->clientlist->size();
 320 }
 321
 322 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 323 unsigned int UserManager::RegisteredUserCount()
 324 {
 325         return this->clientlist->size() - this->UnregisteredUserCount();
 326 }
 327
 328 /* return how many users are opered */
 329 unsigned int UserManager::OperCount()
 330 {
 331         return this->all_opers.size();
 332 }
 333
 334 /* return how many users are unregistered */
 335 unsigned int UserManager::UnregisteredUserCount()
 336 {
 337         return this->unregistered_count;
 338 }
 339
 340 /* return how many local registered users there are */
 341 unsigned int UserManager::LocalUserCount()
 342 {
 343         /* Doesnt count unregistered clients */
 344         return (this->local_users.size() - this->UnregisteredUserCount());
 345 }
 346
 347 void UserManager::ServerNoticeAll(const char* text, ...)
 348 {
 349         if (!text)
 350                 return;
 351
 352         char textbuffer[MAXBUF];
 353         char formatbuffer[MAXBUF];
 354         va_list argsPtr;
 355         va_start (argsPtr, text);
 356         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 357         va_end(argsPtr);
 358
 359         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 360
 361         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 362         {
 363                 User* t = *i;
 364                 t->WriteServ(std::string(formatbuffer));
 365         }
 366 }
 367
 368 void UserManager::ServerPrivmsgAll(const char* text, ...)
 369 {
 370         if (!text)
 371                 return;
 372
 373         char textbuffer[MAXBUF];
 374         char formatbuffer[MAXBUF];
 375         va_list argsPtr;
 376         va_start (argsPtr, text);
 377         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 378         va_end(argsPtr);
 379
 380         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 381
 382         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 383         {
 384                 User* t = *i;
 385                 t->WriteServ(std::string(formatbuffer));
 386         }
 387 }
 388
 389
 390 /* return how many users have a given mode e.g. 'a' */
 391 int UserManager::ModeCount(const char mode)
 392 {
 393         ModeHandler* mh = ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 394
 395         if (mh)
 396                 return mh->GetCount();
 397         else
 398                 return 0;
 399 }