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 unreal-style oper-override */
  30
  31 class ModuleOverride : public Module
  32 {
  33         bool RequireKey;
  34         bool NoisyOverride;
  35
  36  public:
  37
  38         ModuleOverride()
  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, 6);
  45         }
  46
  47         void OnRehash(User* user)
  48         {
  49                 // on a rehash we delete our classes for good measure and create them again.
  50                 ConfigReader Conf;
  51
  52                 // re-read our config options on a rehash
  53                 NoisyOverride = Conf.ReadFlag("override", "noisy", 0);
  54                 RequireKey = Conf.ReadFlag("override", "requirekey", 0);
  55         }
  56
  57         void On005Numeric(std::string &output)
  58         {
  59                 output.append(" OVERRIDE");
  60         }
  61
  62         bool CanOverride(User* source, const char* token)
  63         {
  64                 std::string tokenlist = source->oper->getConfig("override");
  65
  66                 // its defined or * is set, return its value as a boolean for if the token is set
  67                 return ((tokenlist.find(token, 0) != std::string::npos) || (tokenlist.find("*", 0) != std::string::npos));
  68         }
  69
  70
  71         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic)
  72         {
  73                 if (IS_LOCAL(source) && IS_OPER(source) && CanOverride(source, "TOPIC"))
  74                 {
  75                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetPrefixValue(source) < HALFOP_VALUE))
  76                         {
  77                                 ServerInstance->SNO->WriteGlobalSno('v',std::string(source->nick)+" used oper override to change a topic on "+std::string(channel->name));
  78                         }
  79
  80                         // Explicit allow
  81                         return MOD_RES_ALLOW;
  82                 }
  83
  84                 return MOD_RES_PASSTHRU;
  85         }
  86
  87         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason)
  88         {
  89                 if (IS_OPER(source) && CanOverride(source,"KICK"))
  90                 {
  91                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
  92                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
  93                         {
  94                                 ServerInstance->SNO->WriteGlobalSno('v',std::string(source->nick)+" used oper override to kick "+std::string(memb->user->nick)+" on "+std::string(memb->chan->name)+" ("+reason+")");
  95                                 return MOD_RES_ALLOW;
  96                         }
  97                 }
  98                 return MOD_RES_PASSTHRU;
  99         }
 100
 101         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters)
 102         {
 103                 if (!source || !channel)
 104                         return MOD_RES_PASSTHRU;
 105                 if (!IS_OPER(source) || !IS_LOCAL(source))
 106                         return MOD_RES_PASSTHRU;
 107
 108                 unsigned int mode = channel->GetPrefixValue(source);
 109
 110                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
 111                 {
 112                         std::string msg = std::string(source->nick)+" overriding modes:";
 113                         for(unsigned int i=0; i < parameters.size(); i++)
 114                                 msg += " " + parameters[i];
 115                         ServerInstance->SNO->WriteGlobalSno('v',msg);
 116                         return MOD_RES_ALLOW;
 117                 }
 118                 return MOD_RES_PASSTHRU;
 119         }
 120
 121         ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 122         {
 123                 if (IS_LOCAL(user) && IS_OPER(user))
 124                 {
 125                         if (chan)
 126                         {
 127                                 if (chan->IsModeSet('i') && (CanOverride(user,"INVITE")))
 128                                 {
 129                                         irc::string x(chan->name.c_str());
 130                                         if (!IS_LOCAL(user)->IsInvited(x))
 131                                         {
 132                                                 if (RequireKey && keygiven != "override")
 133                                                 {
 134                                                         // Can't join normally -- must use a special key to bypass restrictions
 135                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 136                                                         return MOD_RES_PASSTHRU;
 137                                                 }
 138
 139                                                 if (NoisyOverride)
 140                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 141                                                 ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +i on "+std::string(cname));
 142                                         }
 143                                         return MOD_RES_ALLOW;
 144                                 }
 145
 146                                 if (chan->IsModeSet('k') && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 147                                 {
 148                                         if (RequireKey && keygiven != "override")
 149                                         {
 150                                                 // Can't join normally -- must use a special key to bypass restrictions
 151                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 152                                                 return MOD_RES_PASSTHRU;
 153                                         }
 154
 155                                         if (NoisyOverride)
 156                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 157                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +k on "+std::string(cname));
 158                                         return MOD_RES_ALLOW;
 159                                 }
 160
 161                                 if (chan->IsModeSet('l') && (chan->GetUserCounter() >= atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 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.c_str(), "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 172                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +l on "+std::string(cname));
 173                                         return MOD_RES_ALLOW;
 174                                 }
 175
 176                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 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.c_str(), "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 187                                         ServerInstance->SNO->WriteGlobalSno('v',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 188                                         return MOD_RES_ALLOW;
 189                                 }
 190                         }
 191                 }
 192                 return MOD_RES_PASSTHRU;
 193         }
 194
 195         Version GetVersion()
 196         {
 197                 return Version("Provides support for unreal-style oper-override",VF_VENDOR);
 198         }
 199 };
 200
 201 MODULE_INIT(ModuleOverride)