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                 Implementation eventlist[] = { I_OnRehash, I_OnPreMode, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPreTopicChange };
  53                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
  54         }
  55
  56         void OnRehash(User* user) CXX11_OVERRIDE
  57         {
  58                 // re-read our config options on a rehash
  59                 ConfigTag* tag = ServerInstance->Config->ConfValue("override");
  60                 NoisyOverride = tag->getBool("noisy");
  61                 RequireKey = tag->getBool("requirekey");
  62         }
  63
  64         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
  65         {
  66                 tokens["OVERRIDE"];
  67         }
  68
  69         bool CanOverride(User* source, const char* token)
  70         {
  71                 std::string tokenlist = source->oper->getConfig("override");
  72
  73                 // its defined or * is set, return its value as a boolean for if the token is set
  74                 return ((tokenlist.find(token, 0) != std::string::npos) || (tokenlist.find("*", 0) != std::string::npos));
  75         }
  76
  77
  78         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic) CXX11_OVERRIDE
  79         {
  80                 if (IS_LOCAL(source) && source->IsOper() && CanOverride(source, "TOPIC"))
  81                 {
  82                         if (!channel->HasUser(source) || (channel->IsModeSet(topiclock) && channel->GetPrefixValue(source) < HALFOP_VALUE))
  83                         {
  84                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to change a topic on "+channel->name);
  85                         }
  86
  87                         // Explicit allow
  88                         return MOD_RES_ALLOW;
  89                 }
  90
  91                 return MOD_RES_PASSTHRU;
  92         }
  93
  94         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason) CXX11_OVERRIDE
  95         {
  96                 if (source->IsOper() && CanOverride(source,"KICK"))
  97                 {
  98                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
  99                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
 100                         {
 101                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to kick "+memb->user->nick+" on "+memb->chan->name+" ("+reason+")");
 102                                 return MOD_RES_ALLOW;
 103                         }
 104                 }
 105                 return MOD_RES_PASSTHRU;
 106         }
 107
 108         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters) CXX11_OVERRIDE
 109         {
 110                 if (!source || !channel)
 111                         return MOD_RES_PASSTHRU;
 112                 if (!source->IsOper() || !IS_LOCAL(source))
 113                         return MOD_RES_PASSTHRU;
 114
 115                 unsigned int mode = channel->GetPrefixValue(source);
 116
 117                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
 118                 {
 119                         std::string msg = source->nick+" overriding modes:";
 120                         for(unsigned int i=0; i < parameters.size(); i++)
 121                                 msg += " " + parameters[i];
 122                         ServerInstance->SNO->WriteGlobalSno('v',msg);
 123                         return MOD_RES_ALLOW;
 124                 }
 125                 return MOD_RES_PASSTHRU;
 126         }
 127
 128         ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
 129         {
 130                 if (user->IsOper())
 131                 {
 132                         if (chan)
 133                         {
 134                                 if (chan->IsModeSet(inviteonly) && (CanOverride(user,"INVITE")))
 135                                 {
 136                                         if (!IS_LOCAL(user)->IsInvited(chan))
 137                                         {
 138                                                 if (RequireKey && keygiven != "override")
 139                                                 {
 140                                                         // Can't join normally -- must use a special key to bypass restrictions
 141                                                         user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 142                                                         return MOD_RES_PASSTHRU;
 143                                                 }
 144
 145                                                 if (NoisyOverride)
 146                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname.c_str(), user->nick.c_str());
 147                                                 ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +i on " + cname);
 148                                         }
 149                                         return MOD_RES_ALLOW;
 150                                 }
 151
 152                                 if (chan->IsModeSet(key) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter(key))
 153                                 {
 154                                         if (RequireKey && keygiven != "override")
 155                                         {
 156                                                 // Can't join normally -- must use a special key to bypass restrictions
 157                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 158                                                 return MOD_RES_PASSTHRU;
 159                                         }
 160
 161                                         if (NoisyOverride)
 162                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname.c_str(), user->nick.c_str());
 163                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +k on " + cname);
 164                                         return MOD_RES_ALLOW;
 165                                 }
 166
 167                                 if (chan->IsModeSet(limit) && (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter(limit))) && (CanOverride(user,"LIMIT")))
 168                                 {
 169                                         if (RequireKey && keygiven != "override")
 170                                         {
 171                                                 // Can't join normally -- must use a special key to bypass restrictions
 172                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 173                                                 return MOD_RES_PASSTHRU;
 174                                         }
 175
 176                                         if (NoisyOverride)
 177                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname.c_str(), user->nick.c_str());
 178                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +l on " + cname);
 179                                         return MOD_RES_ALLOW;
 180                                 }
 181
 182                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 183                                 {
 184                                         if (RequireKey && keygiven != "override")
 185                                         {
 186                                                 // Can't join normally -- must use a special key to bypass restrictions
 187                                                 user->WriteNotice("*** You may not join normally. You must join with a key of 'override' to oper override.");
 188                                                 return MOD_RES_PASSTHRU;
 189                                         }
 190
 191                                         if (NoisyOverride)
 192                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname.c_str(), user->nick.c_str());
 193                                         ServerInstance->SNO->WriteGlobalSno('v',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname.c_str());
 194                                         return MOD_RES_ALLOW;
 195                                 }
 196                         }
 197                 }
 198                 return MOD_RES_PASSTHRU;
 199         }
 200
 201         Version GetVersion() CXX11_OVERRIDE
 202         {
 203                 return Version("Provides support for allowing opers to override certain things",VF_VENDOR);
 204         }
 205 };
 206
 207 MODULE_INIT(ModuleOverride)