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         ChanModeReference topiclock;
  34         ChanModeReference inviteonly;
  35         ChanModeReference key;
  36         ChanModeReference limit;
  37
  38  public:
  39         ModuleOverride()
  40                 : topiclock(this, "topiclock")
  41                 , inviteonly(this, "inviteonly")
  42                 , key(this, "key")
  43                 , limit(this, "limit")
  44         {
  45         }
  46
  47         void init() CXX11_OVERRIDE
  48         {
  49                 ServerInstance->SNO->EnableSnomask('v', "OVERRIDE");
  50         }
  51
  52         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
  53         {
  54                 // re-read our config options
  55                 ConfigTag* tag = ServerInstance->Config->ConfValue("override");
  56                 NoisyOverride = tag->getBool("noisy");
  57                 RequireKey = tag->getBool("requirekey");
  58         }
  59
  60         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
  61         {
  62                 tokens["OVERRIDE"];
  63         }
  64
  65         bool CanOverride(User* source, const char* token)
  66         {
  67                 std::string tokenlist = source->oper->getConfig("override");
  68
  69                 // its defined or * is set, return its value as a boolean for if the token is set
  70                 return ((tokenlist.find(token, 0) != std::string::npos) || (tokenlist.find("*", 0) != std::string::npos));
  71         }
  72
  73
  74         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic) CXX11_OVERRIDE
  75         {
  76                 if (IS_LOCAL(source) && source->IsOper() && CanOverride(source, "TOPIC"))
  77                 {
  78                         if (!channel->HasUser(source) || (channel->IsModeSet(topiclock) && channel->GetPrefixValue(source) < HALFOP_VALUE))
  79                         {
  80                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to change a topic on "+channel->name);
  81                         }
  82
  83                         // Explicit allow
  84                         return MOD_RES_ALLOW;
  85                 }
  86
  87                 return MOD_RES_PASSTHRU;
  88         }
  89
  90         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason) CXX11_OVERRIDE
  91         {
  92                 if (source->IsOper() && CanOverride(source,"KICK"))
  93                 {
  94                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
  95                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
  96                         {
  97                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to kick "+memb->user->nick+" on "+memb->chan->name+" ("+reason+")");
  98                                 return MOD_RES_ALLOW;
  99                         }
 100                 }
 101                 return MOD_RES_PASSTHRU;
 102         }
 103
 104         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters) CXX11_OVERRIDE
 105         {
 106                 if (!channel)
 107                         return MOD_RES_PASSTHRU;
 108                 if (!source->IsOper() || !IS_LOCAL(source))
 109                         return MOD_RES_PASSTHRU;
 110
 111                 unsigned int mode = channel->GetPrefixValue(source);
 112
 113                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
 114                 {
 115                         std::string msg = source->nick+" overriding modes:";
 116                         for(unsigned int i=0; i < parameters.size(); i++)
 117                                 msg += " " + parameters[i];
 118                         ServerInstance->SNO->WriteGlobalSno('v',msg);
 119                         return MOD_RES_ALLOW;
 120                 }
 121                 return MOD_RES_PASSTHRU;
 122         }
 123
 124         ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
 125         {
 126                 if (user->IsOper())
 127                 {
 128                         if (chan)
 129                         {
 130                                 if (chan->IsModeSet(inviteonly) && (CanOverride(user,"INVITE")))
 131                                 {
 132                                         if (!IS_LOCAL(user)->IsInvited(chan))
 133                                         {
 134                                                 if (RequireKey && keygiven != "override")
 135                                                 {
 136                                                         // Can't join normally -- must use a special key to bypass restrictions
 137                                                         user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 138                                                         return MOD_RES_PASSTHRU;
 139                                                 }
 140
 141                                                 if (NoisyOverride)
 142                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname.c_str(), user->nick.c_str());
 143                                                 ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +i on " + cname);
 144                                         }
 145                                         return MOD_RES_ALLOW;
 146                                 }
 147
 148                                 if (chan->IsModeSet(key) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter(key))
 149                                 {
 150                                         if (RequireKey && keygiven != "override")
 151                                         {
 152                                                 // Can't join normally -- must use a special key to bypass restrictions
 153                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 154                                                 return MOD_RES_PASSTHRU;
 155                                         }
 156
 157                                         if (NoisyOverride)
 158                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname.c_str(), user->nick.c_str());
 159                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +k on " + cname);
 160                                         return MOD_RES_ALLOW;
 161                                 }
 162
 163                                 if (chan->IsModeSet(limit) && (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter(limit))) && (CanOverride(user,"LIMIT")))
 164                                 {
 165                                         if (RequireKey && keygiven != "override")
 166                                         {
 167                                                 // Can't join normally -- must use a special key to bypass restrictions
 168                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 169                                                 return MOD_RES_PASSTHRU;
 170                                         }
 171
 172                                         if (NoisyOverride)
 173                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname.c_str(), user->nick.c_str());
 174                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +l on " + cname);
 175                                         return MOD_RES_ALLOW;
 176                                 }
 177
 178                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 179                                 {
 180                                         if (RequireKey && keygiven != "override")
 181                                         {
 182                                                 // Can't join normally -- must use a special key to bypass restrictions
 183                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 184                                                 return MOD_RES_PASSTHRU;
 185                                         }
 186
 187                                         if (NoisyOverride)
 188                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname.c_str(), user->nick.c_str());
 189                                         ServerInstance->SNO->WriteGlobalSno('v',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname.c_str());
 190                                         return MOD_RES_ALLOW;
 191                                 }
 192                         }
 193                 }
 194                 return MOD_RES_PASSTHRU;
 195         }
 196
 197         Version GetVersion() CXX11_OVERRIDE
 198         {
 199                 return Version("Provides support for allowing opers to override certain things",VF_VENDOR);
 200         }
 201 };
 202
 203 MODULE_INIT(ModuleOverride)