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         : clientlist(new user_hash)
  29         , uuidlist(new user_hash)
  30         , unregistered_count(0), local_count(0)
  31 {
  32 }
  33
  34 UserManager::~UserManager()
  35 {
  36         for (user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
  37         {
  38                 delete i->second;
  39         }
  40
  41         delete clientlist;
  42         delete uuidlist;
  43 }
  44
  45 /* add a client connection to the sockets list */
  46 void UserManager::AddUser(int socket, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
  47 {
  48         /* NOTE: Calling this one parameter constructor for User automatically
  49          * allocates a new UUID and places it in the hash_map.
  50          */
  51         LocalUser* New = NULL;
  52         try
  53         {
  54                 New = new LocalUser(socket, client, server);
  55         }
  56         catch (...)
  57         {
  58                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "*** WTF *** Duplicated UUID! -- Crack smoking monkeys have been unleashed.");
  59                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING *** Duplicate UUID allocated!");
  60                 return;
  61         }
  62         UserIOHandler* eh = &New->eh;
  63
  64         /* Give each of the modules an attempt to hook the user for I/O */
  65         FOREACH_MOD(I_OnHookIO, OnHookIO(eh, via));
  66
  67         if (eh->GetIOHook())
  68         {
  69                 try
  70                 {
  71                         eh->GetIOHook()->OnStreamSocketAccept(eh, client, server);
  72                 }
  73                 catch (CoreException& modexcept)
  74                 {
  75                         ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  76                 }
  77         }
  78
  79         ServerInstance->Logs->Log("USERS", LOG_DEBUG, "New user fd: %d", socket);
  80
  81         this->unregistered_count++;
  82
  83         /* The users default nick is their UUID */
  84         New->nick = New->uuid;
  85         (*(this->clientlist))[New->nick] = New;
  86
  87         New->registered = REG_NONE;
  88         New->signon = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
  89         New->lastping = 1;
  90
  91         ServerInstance->Users->AddLocalClone(New);
  92         ServerInstance->Users->AddGlobalClone(New);
  93
  94         New->localuseriter = this->local_users.insert(local_users.end(), New);
  95         local_count++;
  96
  97         if ((this->local_users.size() > ServerInstance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)ServerInstance->SE->GetMaxFds()))
  98         {
  99                 ServerInstance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", ServerInstance->Config->SoftLimit);
 100                 this->QuitUser(New,"No more connections allowed");
 101                 return;
 102         }
 103
 104         /*
 105          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 106          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 107          */
 108         New->SetClass();
 109
 110         /*
 111          * Check connect class settings and initialise settings into User.
 112          * This will be done again after DNS resolution. -- w00t
 113          */
 114         New->CheckClass();
 115         if (New->quitting)
 116                 return;
 117
 118         /*
 119          * even with bancache, we still have to keep User::exempt current.
 120          * besides that, if we get a positive bancache hit, we still won't fuck
 121          * them over if they are exempt. -- w00t
 122          */
 123         New->exempt = (ServerInstance->XLines->MatchesLine("E",New) != NULL);
 124
 125         if (BanCacheHit *b = ServerInstance->BanCache->GetHit(New->GetIPString()))
 126         {
 127                 if (!b->Type.empty() && !New->exempt)
 128                 {
 129                         /* user banned */
 130                         ServerInstance->Logs->Log("BANCACHE", LOG_DEBUG, "BanCache: Positive hit for " + New->GetIPString());
 131                         if (!ServerInstance->Config->MoronBanner.empty())
 132                                 New->WriteNotice("*** " +  ServerInstance->Config->MoronBanner);
 133                         this->QuitUser(New, b->Reason);
 134                         return;
 135                 }
 136                 else
 137                 {
 138                         ServerInstance->Logs->Log("BANCACHE", LOG_DEBUG, "BanCache: Negative hit for " + New->GetIPString());
 139                 }
 140         }
 141         else
 142         {
 143                 if (!New->exempt)
 144                 {
 145                         XLine* r = ServerInstance->XLines->MatchesLine("Z",New);
 146
 147                         if (r)
 148                         {
 149                                 r->Apply(New);
 150                                 return;
 151                         }
 152                 }
 153         }
 154
 155         if (!ServerInstance->SE->AddFd(eh, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE))
 156         {
 157                 ServerInstance->Logs->Log("USERS", LOG_DEBUG, "Internal error on new connection");
 158                 this->QuitUser(New, "Internal error handling connection");
 159         }
 160
 161         if (ServerInstance->Config->RawLog)
 162                 New->WriteNotice("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");
 163
 164         FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(New));
 165         if (New->quitting)
 166                 return;
 167
 168         FOREACH_MOD(I_OnUserInit,OnUserInit(New));
 169 }
 170
 171 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 172 {
 173         if (user->quitting)
 174         {
 175                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Tried to quit quitting user: " + user->nick);
 176                 return;
 177         }
 178
 179         if (IS_SERVER(user))
 180         {
 181                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Tried to quit server user: " + user->nick);
 182                 return;
 183         }
 184
 185         user->quitting = true;
 186
 187         ServerInstance->Logs->Log("USERS", LOG_DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 188         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 189
 190         std::string reason;
 191         std::string oper_reason;
 192         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 193         if (operreason && *operreason)
 194                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 195         else
 196                 oper_reason = quitreason;
 197
 198         ServerInstance->GlobalCulls.AddItem(user);
 199
 200         if (user->registered == REG_ALL)
 201         {
 202                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 203                 user->WriteCommonQuit(reason, oper_reason);
 204         }
 205
 206         if (user->registered != REG_ALL)
 207                 if (ServerInstance->Users->unregistered_count)
 208                         ServerInstance->Users->unregistered_count--;
 209
 210         if (IS_LOCAL(user))
 211         {
 212                 LocalUser* lu = IS_LOCAL(user);
 213                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(lu));
 214                 lu->eh.Close();
 215         }
 216
 217         /*
 218          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 219          * if they were an oper with +s +qQ.
 220          */
 221         if (user->registered == REG_ALL)
 222         {
 223                 if (IS_LOCAL(user))
 224                 {
 225                         if (!user->quietquit)
 226                         {
 227                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s (%s) [%s]",
 228                                         user->GetFullRealHost().c_str(), user->GetIPString().c_str(), oper_reason.c_str());
 229                         }
 230                 }
 231                 else
 232                 {
 233                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 234                         {
 235                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s (%s) [%s]",
 236                                         user->server.c_str(), user->GetFullRealHost().c_str(), user->GetIPString().c_str(), oper_reason.c_str());
 237                         }
 238                 }
 239         }
 240
 241         user_hash::iterator iter = this->clientlist->find(user->nick);
 242
 243         if (iter != this->clientlist->end())
 244                 this->clientlist->erase(iter);
 245         else
 246                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Nick not found in clientlist, cannot remove: " + user->nick);
 247
 248         ServerInstance->Users->uuidlist->erase(user->uuid);
 249 }
 250
 251 void UserManager::AddLocalClone(User *user)
 252 {
 253         local_clones[user->GetCIDRMask()]++;
 254 }
 255
 256 void UserManager::AddGlobalClone(User *user)
 257 {
 258         global_clones[user->GetCIDRMask()]++;
 259 }
 260
 261 void UserManager::RemoveCloneCounts(User *user)
 262 {
 263         if (IS_LOCAL(user))
 264         {
 265                 clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 266                 if (x != local_clones.end())
 267                 {
 268                         x->second--;
 269                         if (!x->second)
 270                         {
 271                                 local_clones.erase(x);
 272                         }
 273                 }
 274         }
 275
 276         clonemap::iterator y = global_clones.find(user->GetCIDRMask());
 277         if (y != global_clones.end())
 278         {
 279                 y->second--;
 280                 if (!y->second)
 281                 {
 282                         global_clones.erase(y);
 283                 }
 284         }
 285 }
 286
 287 unsigned long UserManager::GlobalCloneCount(User *user)
 288 {
 289         clonemap::iterator x = global_clones.find(user->GetCIDRMask());
 290         if (x != global_clones.end())
 291                 return x->second;
 292         else
 293                 return 0;
 294 }
 295
 296 unsigned long UserManager::LocalCloneCount(User *user)
 297 {
 298         clonemap::iterator x = local_clones.find(user->GetCIDRMask());
 299         if (x != local_clones.end())
 300                 return x->second;
 301         else
 302                 return 0;
 303 }
 304
 305 void UserManager::ServerNoticeAll(const char* text, ...)
 306 {
 307         std::string message;
 308         VAFORMAT(message, text, text);
 309         message = "NOTICE $" + ServerInstance->Config->ServerName + " :" + message;
 310
 311         for (LocalUserList::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 312         {
 313                 User* t = *i;
 314                 t->WriteServ(message);
 315         }
 316 }
 317
 318 /* return how many users have a given mode e.g. 'a' */
 319 int UserManager::ModeCount(const char mode)
 320 {
 321         int c = 0;
 322         for(user_hash::iterator i = clientlist->begin(); i != clientlist->end(); ++i)
 323         {
 324                 User* u = i->second;
 325                 if (u->modes[mode-65])
 326                         c++;
 327         }
 328         return c;
 329 }
 330
 331 void UserManager::GarbageCollect()
 332 {
 333         // Reset the already_sent IDs so we don't wrap it around and drop a message
 334         LocalUser::already_sent_id = 0;
 335         for (LocalUserList::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
 336         {
 337                 (**i).already_sent = 0;
 338                 (**i).RemoveExpiredInvites();
 339         }
 340 }
 341
 342 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 343  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 344  * registration timeout maximum seconds)
 345  */
 346 bool UserManager::AllModulesReportReady(LocalUser* user)
 347 {
 348         ModResult res;
 349         FIRST_MOD_RESULT(OnCheckReady, res, (user));
 350         return (res == MOD_RES_PASSTHRU);
 351 }