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 /* $ModDesc: Provides support for allowing opers to override certain things. */
  30
  31 class ModuleOverride : public Module
  32 {
  33         bool RequireKey;
  34         bool NoisyOverride;
  35
  36  public:
  37
  38         void init()
  39         {
  40                 // read our config options (main config file)
  41                 OnRehash(NULL);
  42                 ServerInstance->SNO->EnableSnomask('v', "OVERRIDE");
  43                 Implementation eventlist[] = { I_OnRehash, I_OnPreMode, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPreTopicChange };
  44                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
  45         }
  46
  47         void OnRehash(User* user)
  48         {
  49                 // re-read our config options on a rehash
  50                 ConfigTag* tag = ServerInstance->Config->ConfValue("override");
  51                 NoisyOverride = tag->getBool("noisy");
  52                 RequireKey = tag->getBool("requirekey");
  53         }
  54
  55         void On005Numeric(std::map<std::string, std::string>& tokens)
  56         {
  57                 tokens["OVERRIDE"];
  58         }
  59
  60         bool CanOverride(User* source, const char* token)
  61         {
  62                 std::string tokenlist = source->oper->getConfig("override");
  63
  64                 // its defined or * is set, return its value as a boolean for if the token is set
  65                 return ((tokenlist.find(token, 0) != std::string::npos) || (tokenlist.find("*", 0) != std::string::npos));
  66         }
  67
  68
  69         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic)
  70         {
  71                 if (IS_LOCAL(source) && source->IsOper() && CanOverride(source, "TOPIC"))
  72                 {
  73                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetPrefixValue(source) < HALFOP_VALUE))
  74                         {
  75                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to change a topic on "+channel->name);
  76                         }
  77
  78                         // Explicit allow
  79                         return MOD_RES_ALLOW;
  80                 }
  81
  82                 return MOD_RES_PASSTHRU;
  83         }
  84
  85         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason)
  86         {
  87                 if (source->IsOper() && CanOverride(source,"KICK"))
  88                 {
  89                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
  90                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
  91                         {
  92                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to kick "+memb->user->nick+" on "+memb->chan->name+" ("+reason+")");
  93                                 return MOD_RES_ALLOW;
  94                         }
  95                 }
  96                 return MOD_RES_PASSTHRU;
  97         }
  98
  99         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters)
 100         {
 101                 if (!source || !channel)
 102                         return MOD_RES_PASSTHRU;
 103                 if (!source->IsOper() || !IS_LOCAL(source))
 104                         return MOD_RES_PASSTHRU;
 105
 106                 unsigned int mode = channel->GetPrefixValue(source);
 107
 108                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
 109                 {
 110                         std::string msg = source->nick+" overriding modes:";
 111                         for(unsigned int i=0; i < parameters.size(); i++)
 112                                 msg += " " + parameters[i];
 113                         ServerInstance->SNO->WriteGlobalSno('v',msg);
 114                         return MOD_RES_ALLOW;
 115                 }
 116                 return MOD_RES_PASSTHRU;
 117         }
 118
 119         ModResult OnUserPreJoin(User* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven)
 120         {
 121                 if (IS_LOCAL(user) && user->IsOper())
 122                 {
 123                         if (chan)
 124                         {
 125                                 if (chan->IsModeSet('i') && (CanOverride(user,"INVITE")))
 126                                 {
 127                                         irc::string x(chan->name.c_str());
 128                                         if (!IS_LOCAL(user)->IsInvited(x))
 129                                         {
 130                                                 if (RequireKey && keygiven != "override")
 131                                                 {
 132                                                         // Can't join normally -- must use a special key to bypass restrictions
 133                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 134                                                         return MOD_RES_PASSTHRU;
 135                                                 }
 136
 137                                                 if (NoisyOverride)
 138                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname.c_str(), user->nick.c_str());
 139                                                 ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +i on " + cname);
 140                                         }
 141                                         return MOD_RES_ALLOW;
 142                                 }
 143
 144                                 if (chan->IsModeSet('k') && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 145                                 {
 146                                         if (RequireKey && keygiven != "override")
 147                                         {
 148                                                 // Can't join normally -- must use a special key to bypass restrictions
 149                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 150                                                 return MOD_RES_PASSTHRU;
 151                                         }
 152
 153                                         if (NoisyOverride)
 154                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname.c_str(), user->nick.c_str());
 155                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +k on " + cname);
 156                                         return MOD_RES_ALLOW;
 157                                 }
 158
 159                                 if (chan->IsModeSet('l') && (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter('l'))) && (CanOverride(user,"LIMIT")))
 160                                 {
 161                                         if (RequireKey && keygiven != "override")
 162                                         {
 163                                                 // Can't join normally -- must use a special key to bypass restrictions
 164                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 165                                                 return MOD_RES_PASSTHRU;
 166                                         }
 167
 168                                         if (NoisyOverride)
 169                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname.c_str(), user->nick.c_str());
 170                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +l on " + cname);
 171                                         return MOD_RES_ALLOW;
 172                                 }
 173
 174                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 175                                 {
 176                                         if (RequireKey && keygiven != "override")
 177                                         {
 178                                                 // Can't join normally -- must use a special key to bypass restrictions
 179                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 180                                                 return MOD_RES_PASSTHRU;
 181                                         }
 182
 183                                         if (NoisyOverride)
 184                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname.c_str(), user->nick.c_str());
 185                                         ServerInstance->SNO->WriteGlobalSno('v',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname.c_str());
 186                                         return MOD_RES_ALLOW;
 187                                 }
 188                         }
 189                 }
 190                 return MOD_RES_PASSTHRU;
 191         }
 192
 193         Version GetVersion()
 194         {
 195                 return Version("Provides support for allowing opers to override certain things",VF_VENDOR);
 196         }
 197 };
 198
 199 MODULE_INIT(ModuleOverride)