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