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         static bool IsOverride(unsigned int userlevel, const std::string& modeline)
  37         {
  38                 for (std::string::const_iterator i = modeline.begin(); i != modeline.end(); ++i)
  39                 {
  40                         ModeHandler* mh = ServerInstance->Modes->FindMode(*i, MODETYPE_CHANNEL);
  41                         if (!mh)
  42                                 continue;
  43
  44                         if (mh->GetLevelRequired() > userlevel)
  45                                 return true;
  46                 }
  47                 return false;
  48         }
  49
  50  public:
  51
  52         void init()
  53         {
  54                 // read our config options (main config file)
  55                 OnRehash(NULL);
  56                 ServerInstance->SNO->EnableSnomask('v', "OVERRIDE");
  57                 Implementation eventlist[] = { I_OnRehash, I_OnPreMode, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPreTopicChange };
  58                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
  59         }
  60
  61         void OnRehash(User* user)
  62         {
  63                 // re-read our config options on a rehash
  64                 ConfigTag* tag = ServerInstance->Config->ConfValue("override");
  65                 NoisyOverride = tag->getBool("noisy");
  66                 RequireKey = tag->getBool("requirekey");
  67         }
  68
  69         void On005Numeric(std::string &output)
  70         {
  71                 output.append(" OVERRIDE");
  72         }
  73
  74         bool CanOverride(User* source, const char* token)
  75         {
  76                 std::string tokenlist = source->oper->getConfig("override");
  77
  78                 // its defined or * is set, return its value as a boolean for if the token is set
  79                 return ((tokenlist.find(token, 0) != std::string::npos) || (tokenlist.find("*", 0) != std::string::npos));
  80         }
  81
  82
  83         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic)
  84         {
  85                 if (IS_LOCAL(source) && IS_OPER(source) && CanOverride(source, "TOPIC"))
  86                 {
  87                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetPrefixValue(source) < HALFOP_VALUE))
  88                         {
  89                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to change a topic on "+channel->name);
  90                         }
  91
  92                         // Explicit allow
  93                         return MOD_RES_ALLOW;
  94                 }
  95
  96                 return MOD_RES_PASSTHRU;
  97         }
  98
  99         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason)
 100         {
 101                 if (IS_OPER(source) && CanOverride(source,"KICK"))
 102                 {
 103                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
 104                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
 105                         {
 106                                 ServerInstance->SNO->WriteGlobalSno('v',source->nick+" used oper override to kick "+memb->user->nick+" on "+memb->chan->name+" ("+reason+")");
 107                                 return MOD_RES_ALLOW;
 108                         }
 109                 }
 110                 return MOD_RES_PASSTHRU;
 111         }
 112
 113         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters)
 114         {
 115                 if (!source || !channel)
 116                         return MOD_RES_PASSTHRU;
 117                 if (!IS_OPER(source) || !IS_LOCAL(source))
 118                         return MOD_RES_PASSTHRU;
 119
 120                 unsigned int mode = channel->GetPrefixValue(source);
 121
 122                 if (!IsOverride(mode, parameters[1]))
 123                         return MOD_RES_PASSTHRU;
 124
 125                 if (CanOverride(source, "MODE"))
 126                 {
 127                         std::string msg = source->nick+" overriding modes:";
 128                         for(unsigned int i=0; i < parameters.size(); i++)
 129                                 msg += " " + parameters[i];
 130                         ServerInstance->SNO->WriteGlobalSno('v',msg);
 131                         return MOD_RES_ALLOW;
 132                 }
 133                 return MOD_RES_PASSTHRU;
 134         }
 135
 136         ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 137         {
 138                 if (IS_LOCAL(user) && IS_OPER(user))
 139                 {
 140                         if (chan)
 141                         {
 142                                 if (chan->IsModeSet('i') && (CanOverride(user,"INVITE")))
 143                                 {
 144                                         irc::string x(chan->name.c_str());
 145                                         if (!IS_LOCAL(user)->IsInvited(x))
 146                                         {
 147                                                 if (RequireKey && keygiven != "override")
 148                                                 {
 149                                                         // Can't join normally -- must use a special key to bypass restrictions
 150                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 151                                                         return MOD_RES_PASSTHRU;
 152                                                 }
 153
 154                                                 if (NoisyOverride)
 155                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 156                                                 ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +i on "+std::string(cname));
 157                                         }
 158                                         return MOD_RES_ALLOW;
 159                                 }
 160
 161                                 if (chan->IsModeSet('k') && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 162                                 {
 163                                         if (RequireKey && keygiven != "override")
 164                                         {
 165                                                 // Can't join normally -- must use a special key to bypass restrictions
 166                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 167                                                 return MOD_RES_PASSTHRU;
 168                                         }
 169
 170                                         if (NoisyOverride)
 171                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 172                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +k on "+std::string(cname));
 173                                         return MOD_RES_ALLOW;
 174                                 }
 175
 176                                 if (chan->IsModeSet('l') && (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter('l'))) && (CanOverride(user,"LIMIT")))
 177                                 {
 178                                         if (RequireKey && keygiven != "override")
 179                                         {
 180                                                 // Can't join normally -- must use a special key to bypass restrictions
 181                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 182                                                 return MOD_RES_PASSTHRU;
 183                                         }
 184
 185                                         if (NoisyOverride)
 186                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 187                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +l on "+std::string(cname));
 188                                         return MOD_RES_ALLOW;
 189                                 }
 190
 191                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 192                                 {
 193                                         if (RequireKey && keygiven != "override")
 194                                         {
 195                                                 // Can't join normally -- must use a special key to bypass restrictions
 196                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 197                                                 return MOD_RES_PASSTHRU;
 198                                         }
 199
 200                                         if (NoisyOverride)
 201                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 202                                         ServerInstance->SNO->WriteGlobalSno('v',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 203                                         return MOD_RES_ALLOW;
 204                                 }
 205                         }
 206                 }
 207                 return MOD_RES_PASSTHRU;
 208         }
 209
 210         Version GetVersion()
 211         {
 212                 return Version("Provides support for allowing opers to override certain things",VF_VENDOR);
 213         }
 214 };
 215
 216 MODULE_INIT(ModuleOverride)