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.assign(New->uuid, 0, ServerInstance->Config->Limits.NickMax);
  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         this->local_users.push_back(New);
  77
  78         if ((this->local_users.size() > ServerInstance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)ServerInstance->SE->GetMaxFds()))
  79         {
  80                 ServerInstance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", ServerInstance->Config->SoftLimit);
  81                 this->QuitUser(New,"No more connections allowed");
  82                 return;
  83         }
  84
  85         /*
  86          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  87          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  88          */
  89         New->SetClass();
  90
  91         /*
  92          * Check connect class settings and initialise settings into User.
  93          * This will be done again after DNS resolution. -- w00t
  94          */
  95         New->CheckClass();
  96         if (New->quitting)
  97                 return;
  98
  99         /*
 100          * even with bancache, we still have to keep User::exempt current.
 101          * besides that, if we get a positive bancache hit, we still won't fuck
 102          * them over if they are exempt. -- w00t
 103          */
 104         New->exempt = (ServerInstance->XLines->MatchesLine("E",New) != NULL);
 105
 106         if (BanCacheHit *b = ServerInstance->BanCache->GetHit(New->GetIPString()))
 107         {
 108                 if (!b->Type.empty() && !New->exempt)
 109                 {
 110                         /* user banned */
 111                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 112                         if (!ServerInstance->Config->MoronBanner.empty())
 113                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), ServerInstance->Config->MoronBanner.c_str());
 114                         this->QuitUser(New, b->Reason);
 115                         return;
 116                 }
 117                 else
 118                 {
 119                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 120                 }
 121         }
 122         else
 123         {
 124                 if (!New->exempt)
 125                 {
 126                         XLine* r = ServerInstance->XLines->MatchesLine("Z",New);
 127
 128                         if (r)
 129                         {
 130                                 r->Apply(New);
 131                                 return;
 132                         }
 133                 }
 134         }
 135
 136         if (!ServerInstance->SE->AddFd(eh, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE))
 137         {
 138                 ServerInstance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 139                 this->QuitUser(New, "Internal error handling connection");
 140         }
 141
 142         /* NOTE: even if dns lookups are *off*, we still need to display this.
 143          * BOPM and other stuff requires it.
 144          */
 145         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 146         if (ServerInstance->Config->RawLog)
 147                 New->WriteServ("NOTICE Auth :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 148
 149         FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(New));
 150         FOREACH_MOD(I_OnUserInit,OnUserInit(New));
 151
 152         if (ServerInstance->Config->NoUserDns)
 153         {
 154                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 155                 New->dns_done = true;
 156         }
 157         else
 158         {
 159                 New->StartDNSLookup();
 160         }
 161 }
 162
 163 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 164 {
 165         if (user->quitting)
 166         {
 167                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 168                 return;
 169         }
 170
 171         if (IS_SERVER(user))
 172         {
 173                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a fake user (%s)", user->nick.c_str());
 174                 return;
 175         }
 176
 177         user->quitting = true;
 178
 179         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 180         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 181
 182         std::string reason;
 183         std::string oper_reason;
 184         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 185         if (operreason && *operreason)
 186                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 187         else
 188                 oper_reason = quitreason;
 189
 190         ServerInstance->GlobalCulls.AddItem(user);
 191
 192         if (user->registered == REG_ALL)
 193         {
 194                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 195                 user->WriteCommonQuit(reason, oper_reason);
 196         }
 197
 198         if (user->registered != REG_ALL)
 199                 if (ServerInstance->Users->unregistered_count)
 200                         ServerInstance->Users->unregistered_count--;
 201
 202         if (IS_LOCAL(user))
 203         {
 204                 LocalUser* lu = IS_LOCAL(user);
 205                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 206                 lu->eh.Close();
 207         }
 208
 209         /*
 210          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 211          * if they were an oper with +s +qQ.
 212          */
 213         if (user->registered == REG_ALL)
 214         {
 215                 if (IS_LOCAL(user))
 216                 {
 217                         if (!user->quietquit)
 218                         {
 219                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s (%s) [%s]",
 220                                         user->GetFullRealHost().c_str(), user->GetIPString(), oper_reason.c_str());
 221                         }
 222                 }
 223                 else
 224                 {
 225                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 226                         {
 227                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s (%s) [%s]",
 228                                         user->server.c_str(), user->GetFullRealHost().c_str(), user->GetIPString(), oper_reason.c_str());
 229                         }
 230                 }
 231                 user->AddToWhoWas();
 232         }
 233
 234         user_hash::iterator iter = this->clientlist->find(user->nick);
 235
 236         if (iter != this->clientlist->end())
 237                 this->clientlist->erase(iter);
 238         else
 239                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 240
 241         ServerInstance->Users->uuidlist->erase(user->uuid);
 242 }
 243
 244
 245 void UserManager::AddLocalClone(User *user)
 246 {
 247         local_clones[user->GetCIDRMask()]++;
 248 }
 249
 250 void UserManager::AddGlobalClone(User *user)
 251 {
 252         global_clones[user->GetCIDRMask()]++;
 253 }
 254
 255 void UserManager::RemoveCloneCounts(User *user)
 256 {
 257         if (IS_LOCAL(user))
 258         {
 259                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 260                 if (x != local_clones.end())
 261                 {
 262                         x->second--;
 263                         if (!x->second)
 264                         {
 265                                 local_clones.erase(x);
 266                         }
 267                 }
 268         }
 269
 270         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 271         if (y != global_clones.end())
 272         {
 273                 y->second--;
 274                 if (!y->second)
 275                 {
 276                         global_clones.erase(y);
 277                 }
 278         }
 279 }
 280
 281 unsigned long UserManager::GlobalCloneCount(User *user)
 282 {
 283         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 284         if (x != global_clones.end())
 285                 return x->second;
 286         else
 287                 return 0;
 288 }
 289
 290 unsigned long UserManager::LocalCloneCount(User *user)
 291 {
 292         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 293         if (x != local_clones.end())
 294                 return x->second;
 295         else
 296                 return 0;
 297 }
 298
 299 /* this function counts all users connected, wether they are registered or NOT. */
 300 unsigned int UserManager::UserCount()
 301 {
 302         /*
 303          * XXX: Todo:
 304          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 305          *      -- w00t
 306          */
 307         return this->clientlist->size();
 308 }
 309
 310 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 311 unsigned int UserManager::RegisteredUserCount()
 312 {
 313         return this->clientlist->size() - this->UnregisteredUserCount();
 314 }
 315
 316 /* return how many users are opered */
 317 unsigned int UserManager::OperCount()
 318 {
 319         return this->all_opers.size();
 320 }
 321
 322 /* return how many users are unregistered */
 323 unsigned int UserManager::UnregisteredUserCount()
 324 {
 325         return this->unregistered_count;
 326 }
 327
 328 /* return how many local registered users there are */
 329 unsigned int UserManager::LocalUserCount()
 330 {
 331         /* Doesnt count unregistered clients */
 332         return (this->local_users.size() - this->UnregisteredUserCount());
 333 }
 334
 335 void UserManager::ServerNoticeAll(const char* text, ...)
 336 {
 337         if (!text)
 338                 return;
 339
 340         char textbuffer[MAXBUF];
 341         char formatbuffer[MAXBUF];
 342         va_list argsPtr;
 343         va_start (argsPtr, text);
 344         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 345         va_end(argsPtr);
 346
 347         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 348
 349         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 350         {
 351                 User* t = *i;
 352                 t->WriteServ(std::string(formatbuffer));
 353         }
 354 }
 355
 356 void UserManager::ServerPrivmsgAll(const char* text, ...)
 357 {
 358         if (!text)
 359                 return;
 360
 361         char textbuffer[MAXBUF];
 362         char formatbuffer[MAXBUF];
 363         va_list argsPtr;
 364         va_start (argsPtr, text);
 365         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 366         va_end(argsPtr);
 367
 368         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 369
 370         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 371         {
 372                 User* t = *i;
 373                 t->WriteServ(std::string(formatbuffer));
 374         }
 375 }
 376
 377
 378 /* return how many users have a given mode e.g. 'a' */
 379 int UserManager::ModeCount(const char mode)
 380 {
 381         int c = 0;
 382         for(user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
 383         {
 384                 User* u = i->second;
 385                 if (u->modes[mode-65])
 386                         c++;
 387         }
 388         return c;
 389 }