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_OnUserInit,OnUserInit(New));
 150
 151         if (ServerInstance->Config->NoUserDns)
 152         {
 153                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 154                 New->dns_done = true;
 155         }
 156         else
 157         {
 158                 New->StartDNSLookup();
 159         }
 160 }
 161
 162 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 163 {
 164         if (user->quitting)
 165         {
 166                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 167                 return;
 168         }
 169
 170         if (IS_SERVER(user))
 171         {
 172                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a fake user (%s)", user->nick.c_str());
 173                 return;
 174         }
 175
 176         user->quitting = true;
 177
 178         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 179         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 180
 181         std::string reason;
 182         std::string oper_reason;
 183         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 184         if (operreason && *operreason)
 185                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 186         else
 187                 oper_reason = quitreason;
 188
 189         ServerInstance->GlobalCulls.AddItem(user);
 190
 191         if (user->registered == REG_ALL)
 192         {
 193                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 194                 user->WriteCommonQuit(reason, oper_reason);
 195         }
 196
 197         if (user->registered != REG_ALL)
 198                 if (ServerInstance->Users->unregistered_count)
 199                         ServerInstance->Users->unregistered_count--;
 200
 201         if (IS_LOCAL(user))
 202         {
 203                 LocalUser* lu = IS_LOCAL(user);
 204                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 205                 lu->eh.Close();
 206         }
 207
 208         /*
 209          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 210          * if they were an oper with +s +qQ.
 211          */
 212         if (user->registered == REG_ALL)
 213         {
 214                 if (IS_LOCAL(user))
 215                 {
 216                         if (!user->quietquit)
 217                         {
 218                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s (%s) [%s]",
 219                                         user->nick.c_str(), user->ident.c_str(), user->host.c_str(), user->GetIPString(), oper_reason.c_str());
 220                         }
 221                 }
 222                 else
 223                 {
 224                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 225                         {
 226                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s (%s) [%s]",
 227                                         user->server.c_str(), user->nick.c_str(), user->ident.c_str(), user->host.c_str(), user->GetIPString(), oper_reason.c_str());
 228                         }
 229                 }
 230                 user->AddToWhoWas();
 231         }
 232
 233         user_hash::iterator iter = this->clientlist->find(user->nick);
 234
 235         if (iter != this->clientlist->end())
 236                 this->clientlist->erase(iter);
 237         else
 238                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 239
 240         ServerInstance->Users->uuidlist->erase(user->uuid);
 241 }
 242
 243
 244 void UserManager::AddLocalClone(User *user)
 245 {
 246         clonemap::iterator x;
 247         x = local_clones.find(user->GetCIDRMask());
 248         if (x != local_clones.end())
 249                 x->second++;
 250         else
 251                 local_clones[user->GetCIDRMask()] = 1;
 252 }
 253
 254 void UserManager::AddGlobalClone(User *user)
 255 {
 256         clonemap::iterator x;
 257
 258         x = global_clones.find(user->GetCIDRMask());
 259         if (x != global_clones.end())
 260                 x->second++;
 261         else
 262                 global_clones[user->GetCIDRMask()] = 1;
 263 }
 264
 265 void UserManager::RemoveCloneCounts(User *user)
 266 {
 267         if (IS_LOCAL(user))
 268         {
 269                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 270                 if (x != local_clones.end())
 271                 {
 272                         x->second--;
 273                         if (!x->second)
 274                         {
 275                                 local_clones.erase(x);
 276                         }
 277                 }
 278         }
 279
 280         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 281         if (y != global_clones.end())
 282         {
 283                 y->second--;
 284                 if (!y->second)
 285                 {
 286                         global_clones.erase(y);
 287                 }
 288         }
 289 }
 290
 291 unsigned long UserManager::GlobalCloneCount(User *user)
 292 {
 293         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 294         if (x != global_clones.end())
 295                 return x->second;
 296         else
 297                 return 0;
 298 }
 299
 300 unsigned long UserManager::LocalCloneCount(User *user)
 301 {
 302         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 303         if (x != local_clones.end())
 304                 return x->second;
 305         else
 306                 return 0;
 307 }
 308
 309 /* this function counts all users connected, wether they are registered or NOT. */
 310 unsigned int UserManager::UserCount()
 311 {
 312         /*
 313          * XXX: Todo:
 314          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 315          *      -- w00t
 316          */
 317         return this->clientlist->size();
 318 }
 319
 320 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 321 unsigned int UserManager::RegisteredUserCount()
 322 {
 323         return this->clientlist->size() - this->UnregisteredUserCount();
 324 }
 325
 326 /* return how many users are opered */
 327 unsigned int UserManager::OperCount()
 328 {
 329         return this->all_opers.size();
 330 }
 331
 332 /* return how many users are unregistered */
 333 unsigned int UserManager::UnregisteredUserCount()
 334 {
 335         return this->unregistered_count;
 336 }
 337
 338 /* return how many local registered users there are */
 339 unsigned int UserManager::LocalUserCount()
 340 {
 341         /* Doesnt count unregistered clients */
 342         return (this->local_users.size() - this->UnregisteredUserCount());
 343 }
 344
 345 void UserManager::ServerNoticeAll(const char* text, ...)
 346 {
 347         if (!text)
 348                 return;
 349
 350         char textbuffer[MAXBUF];
 351         char formatbuffer[MAXBUF];
 352         va_list argsPtr;
 353         va_start (argsPtr, text);
 354         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 355         va_end(argsPtr);
 356
 357         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 358
 359         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 360         {
 361                 User* t = *i;
 362                 t->WriteServ(std::string(formatbuffer));
 363         }
 364 }
 365
 366 void UserManager::ServerPrivmsgAll(const char* text, ...)
 367 {
 368         if (!text)
 369                 return;
 370
 371         char textbuffer[MAXBUF];
 372         char formatbuffer[MAXBUF];
 373         va_list argsPtr;
 374         va_start (argsPtr, text);
 375         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 376         va_end(argsPtr);
 377
 378         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 379
 380         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 381         {
 382                 User* t = *i;
 383                 t->WriteServ(std::string(formatbuffer));
 384         }
 385 }
 386
 387
 388 /* return how many users have a given mode e.g. 'a' */
 389 int UserManager::ModeCount(const char mode)
 390 {
 391         int c = 0;
 392         for(user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
 393         {
 394                 User* u = i->second;
 395                 if (u->modes[mode-65])
 396                         c++;
 397         }
 398         return c;
 399 }