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         static bool IsOverride(unsigned int userlevel, const std::string& modeline)
  39         {
  40                 for (std::string::const_iterator i = modeline.begin(); i != modeline.end(); ++i)
  41                 {
  42                         ModeHandler* mh = ServerInstance->Modes->FindMode(*i, MODETYPE_CHANNEL);
  43                         if (!mh)
  44                                 continue;
  45
  46                         if (mh->GetLevelRequired() > userlevel)
  47                                 return true;
  48                 }
  49                 return false;
  50         }
  51
  52  public:
  53         ModuleOverride()
  54                 : topiclock(this, "topiclock")
  55                 , inviteonly(this, "inviteonly")
  56                 , key(this, "key")
  57                 , limit(this, "limit")
  58         {
  59         }
  60
  61         void init() CXX11_OVERRIDE
  62         {
  63                 ServerInstance->SNO->EnableSnomask('v', "OVERRIDE");
  64         }
  65
  66         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
  67         {
  68                 // re-read our config options
  69                 ConfigTag* tag = ServerInstance->Config->ConfValue("override");
  70                 NoisyOverride = tag->getBool("noisy");
  71                 RequireKey = tag->getBool("requirekey");
  72         }
  73
  74         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
  75         {
  76                 tokens["OVERRIDE"];
  77         }
  78
  79         bool CanOverride(User* source, const char* token)
  80         {
  81                 std::string tokenlist = source->oper->getConfig("override");
  82
  83                 // its defined or * is set, return its value as a boolean for if the token is set
  84                 return ((tokenlist.find(token, 0) != std::string::npos) || (tokenlist.find("*", 0) != std::string::npos));
  85         }
  86
  87
  88         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic) CXX11_OVERRIDE
  89         {
  90                 if (IS_LOCAL(source) && source->IsOper() && CanOverride(source, "TOPIC"))
  91                 {
  92                         if (!channel->HasUser(source) || (channel->IsModeSet(topiclock) && channel->GetPrefixValue(source) < HALFOP_VALUE))
  93                         {
  94                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to change a topic on "+channel->name);
  95                         }
  96
  97                         // Explicit allow
  98                         return MOD_RES_ALLOW;
  99                 }
 100
 101                 return MOD_RES_PASSTHRU;
 102         }
 103
 104         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason) CXX11_OVERRIDE
 105         {
 106                 if (source->IsOper() && CanOverride(source,"KICK"))
 107                 {
 108                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
 109                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
 110                         {
 111                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to kick "+memb->user->nick+" on "+memb->chan->name+" ("+reason+")");
 112                                 return MOD_RES_ALLOW;
 113                         }
 114                 }
 115                 return MOD_RES_PASSTHRU;
 116         }
 117
 118         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters) CXX11_OVERRIDE
 119         {
 120                 if (!channel)
 121                         return MOD_RES_PASSTHRU;
 122                 if (!source->IsOper() || !IS_LOCAL(source))
 123                         return MOD_RES_PASSTHRU;
 124
 125                 unsigned int mode = channel->GetPrefixValue(source);
 126
 127                 if (!IsOverride(mode, parameters[1]))
 128                         return MOD_RES_PASSTHRU;
 129
 130                 if (CanOverride(source, "MODE"))
 131                 {
 132                         std::string msg = source->nick+" overriding modes:";
 133                         for(unsigned int i=0; i < parameters.size(); i++)
 134                                 msg += " " + parameters[i];
 135                         ServerInstance->SNO->WriteGlobalSno('v',msg);
 136                         return MOD_RES_ALLOW;
 137                 }
 138                 return MOD_RES_PASSTHRU;
 139         }
 140
 141         ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
 142         {
 143                 if (user->IsOper())
 144                 {
 145                         if (chan)
 146                         {
 147                                 if (chan->IsModeSet(inviteonly) && (CanOverride(user,"INVITE")))
 148                                 {
 149                                         if (!IS_LOCAL(user)->IsInvited(chan))
 150                                         {
 151                                                 if (RequireKey && keygiven != "override")
 152                                                 {
 153                                                         // Can't join normally -- must use a special key to bypass restrictions
 154                                                         user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 155                                                         return MOD_RES_PASSTHRU;
 156                                                 }
 157
 158                                                 if (NoisyOverride)
 159                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname.c_str(), user->nick.c_str());
 160                                                 ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +i on " + cname);
 161                                         }
 162                                         return MOD_RES_ALLOW;
 163                                 }
 164
 165                                 if (chan->IsModeSet(key) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter(key))
 166                                 {
 167                                         if (RequireKey && keygiven != "override")
 168                                         {
 169                                                 // Can't join normally -- must use a special key to bypass restrictions
 170                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 171                                                 return MOD_RES_PASSTHRU;
 172                                         }
 173
 174                                         if (NoisyOverride)
 175                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname.c_str(), user->nick.c_str());
 176                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +k on " + cname);
 177                                         return MOD_RES_ALLOW;
 178                                 }
 179
 180                                 if (chan->IsModeSet(limit) && (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter(limit))) && (CanOverride(user,"LIMIT")))
 181                                 {
 182                                         if (RequireKey && keygiven != "override")
 183                                         {
 184                                                 // Can't join normally -- must use a special key to bypass restrictions
 185                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 186                                                 return MOD_RES_PASSTHRU;
 187                                         }
 188
 189                                         if (NoisyOverride)
 190                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname.c_str(), user->nick.c_str());
 191                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +l on " + cname);
 192                                         return MOD_RES_ALLOW;
 193                                 }
 194
 195                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 196                                 {
 197                                         if (RequireKey && keygiven != "override")
 198                                         {
 199                                                 // Can't join normally -- must use a special key to bypass restrictions
 200                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 201                                                 return MOD_RES_PASSTHRU;
 202                                         }
 203
 204                                         if (NoisyOverride)
 205                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname.c_str(), user->nick.c_str());
 206                                         ServerInstance->SNO->WriteGlobalSno('v',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname.c_str());
 207                                         return MOD_RES_ALLOW;
 208                                 }
 209                         }
 210                 }
 211                 return MOD_RES_PASSTHRU;
 212         }
 213
 214         Version GetVersion() CXX11_OVERRIDE
 215         {
 216                 return Version("Provides support for allowing opers to override certain things",VF_VENDOR);
 217         }
 218 };
 219
 220 MODULE_INIT(ModuleOverride)