src/modules/m_override.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2009 Uli Schlachter <psychon@znc.in>
   6  *   Copyright (C) 2007-2009 Robin Burchell <robin+git@viroteck.net>
   7  *   Copyright (C) 2007-2008 Dennis Friis <peavey@inspircd.org>
   8  *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
   9  *   Copyright (C) 2008 Geoff Bricker <geoff.bricker@gmail.com>
  10  *   Copyright (C) 2004-2006 Craig Edwards <craigedwards@brainbox.cc>
  11  *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
  12  *
  13  * This file is part of InspIRCd.  InspIRCd is free software: you can
  14  * redistribute it and/or modify it under the terms of the GNU General Public
  15  * License as published by the Free Software Foundation, version 2.
  16  *
  17  * This program is distributed in the hope that it will be useful, but WITHOUT
  18  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  19  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  20  * details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24  */
  25
  26
  27 #include "inspircd.h"
  28
  29 class ModuleOverride : public Module
  30 {
  31         bool RequireKey;
  32         bool NoisyOverride;
  33
  34  public:
  35
  36         void init() CXX11_OVERRIDE
  37         {
  38                 // read our config options (main config file)
  39                 OnRehash(NULL);
  40                 ServerInstance->SNO->EnableSnomask('v', "OVERRIDE");
  41                 Implementation eventlist[] = { I_OnRehash, I_OnPreMode, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPreTopicChange };
  42                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
  43         }
  44
  45         void OnRehash(User* user) CXX11_OVERRIDE
  46         {
  47                 // re-read our config options on a rehash
  48                 ConfigTag* tag = ServerInstance->Config->ConfValue("override");
  49                 NoisyOverride = tag->getBool("noisy");
  50                 RequireKey = tag->getBool("requirekey");
  51         }
  52
  53         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
  54         {
  55                 tokens["OVERRIDE"];
  56         }
  57
  58         bool CanOverride(User* source, const char* token)
  59         {
  60                 std::string tokenlist = source->oper->getConfig("override");
  61
  62                 // its defined or * is set, return its value as a boolean for if the token is set
  63                 return ((tokenlist.find(token, 0) != std::string::npos) || (tokenlist.find("*", 0) != std::string::npos));
  64         }
  65
  66
  67         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic) CXX11_OVERRIDE
  68         {
  69                 if (IS_LOCAL(source) && source->IsOper() && CanOverride(source, "TOPIC"))
  70                 {
  71                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetPrefixValue(source) < HALFOP_VALUE))
  72                         {
  73                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to change a topic on "+channel->name);
  74                         }
  75
  76                         // Explicit allow
  77                         return MOD_RES_ALLOW;
  78                 }
  79
  80                 return MOD_RES_PASSTHRU;
  81         }
  82
  83         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason) CXX11_OVERRIDE
  84         {
  85                 if (source->IsOper() && CanOverride(source,"KICK"))
  86                 {
  87                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
  88                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
  89                         {
  90                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to kick "+memb->user->nick+" on "+memb->chan->name+" ("+reason+")");
  91                                 return MOD_RES_ALLOW;
  92                         }
  93                 }
  94                 return MOD_RES_PASSTHRU;
  95         }
  96
  97         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters) CXX11_OVERRIDE
  98         {
  99                 if (!source || !channel)
 100                         return MOD_RES_PASSTHRU;
 101                 if (!source->IsOper() || !IS_LOCAL(source))
 102                         return MOD_RES_PASSTHRU;
 103
 104                 unsigned int mode = channel->GetPrefixValue(source);
 105
 106                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
 107                 {
 108                         std::string msg = source->nick+" overriding modes:";
 109                         for(unsigned int i=0; i < parameters.size(); i++)
 110                                 msg += " " + parameters[i];
 111                         ServerInstance->SNO->WriteGlobalSno('v',msg);
 112                         return MOD_RES_ALLOW;
 113                 }
 114                 return MOD_RES_PASSTHRU;
 115         }
 116
 117         ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
 118         {
 119                 if (user->IsOper())
 120                 {
 121                         if (chan)
 122                         {
 123                                 if (chan->IsModeSet('i') && (CanOverride(user,"INVITE")))
 124                                 {
 125                                         if (!IS_LOCAL(user)->IsInvited(chan))
 126                                         {
 127                                                 if (RequireKey && keygiven != "override")
 128                                                 {
 129                                                         // Can't join normally -- must use a special key to bypass restrictions
 130                                                         user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 131                                                         return MOD_RES_PASSTHRU;
 132                                                 }
 133
 134                                                 if (NoisyOverride)
 135                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname.c_str(), user->nick.c_str());
 136                                                 ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +i on " + cname);
 137                                         }
 138                                         return MOD_RES_ALLOW;
 139                                 }
 140
 141                                 if (chan->IsModeSet('k') && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 142                                 {
 143                                         if (RequireKey && keygiven != "override")
 144                                         {
 145                                                 // Can't join normally -- must use a special key to bypass restrictions
 146                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 147                                                 return MOD_RES_PASSTHRU;
 148                                         }
 149
 150                                         if (NoisyOverride)
 151                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname.c_str(), user->nick.c_str());
 152                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +k on " + cname);
 153                                         return MOD_RES_ALLOW;
 154                                 }
 155
 156                                 if (chan->IsModeSet('l') && (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter('l'))) && (CanOverride(user,"LIMIT")))
 157                                 {
 158                                         if (RequireKey && keygiven != "override")
 159                                         {
 160                                                 // Can't join normally -- must use a special key to bypass restrictions
 161                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 162                                                 return MOD_RES_PASSTHRU;
 163                                         }
 164
 165                                         if (NoisyOverride)
 166                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname.c_str(), user->nick.c_str());
 167                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +l on " + cname);
 168                                         return MOD_RES_ALLOW;
 169                                 }
 170
 171                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 172                                 {
 173                                         if (RequireKey && keygiven != "override")
 174                                         {
 175                                                 // Can't join normally -- must use a special key to bypass restrictions
 176                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 177                                                 return MOD_RES_PASSTHRU;
 178                                         }
 179
 180                                         if (NoisyOverride)
 181                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname.c_str(), user->nick.c_str());
 182                                         ServerInstance->SNO->WriteGlobalSno('v',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname.c_str());
 183                                         return MOD_RES_ALLOW;
 184                                 }
 185                         }
 186                 }
 187                 return MOD_RES_PASSTHRU;
 188         }
 189
 190         Version GetVersion() CXX11_OVERRIDE
 191         {
 192                 return Version("Provides support for allowing opers to override certain things",VF_VENDOR);
 193         }
 194 };
 195
 196 MODULE_INIT(ModuleOverride)