src/modules/m_override.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2010 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15
  16 /* $ModDesc: Provides support for unreal-style oper-override */
  17
  18 class ModuleOverride : public Module
  19 {
  20         bool RequireKey;
  21         bool NoisyOverride;
  22
  23  public:
  24
  25         ModuleOverride()
  26                         {
  27                 // read our config options (main config file)
  28                 OnRehash(NULL);
  29                 ServerInstance->SNO->EnableSnomask('v', "OVERRIDE");
  30                 Implementation eventlist[] = { I_OnRehash, I_OnPreMode, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPreTopicChange };
  31                 ServerInstance->Modules->Attach(eventlist, this, 6);
  32         }
  33
  34         void OnRehash(User* user)
  35         {
  36                 // on a rehash we delete our classes for good measure and create them again.
  37                 ConfigReader Conf;
  38
  39                 // re-read our config options on a rehash
  40                 NoisyOverride = Conf.ReadFlag("override", "noisy", 0);
  41                 RequireKey = Conf.ReadFlag("override", "requirekey", 0);
  42         }
  43
  44         void On005Numeric(std::string &output)
  45         {
  46                 output.append(" OVERRIDE");
  47         }
  48
  49         bool CanOverride(User* source, const char* token)
  50         {
  51                 std::string tokenlist = source->oper->getConfig("override");
  52
  53                 // its defined or * is set, return its value as a boolean for if the token is set
  54                 return ((tokenlist.find(token, 0) != std::string::npos) || (tokenlist.find("*", 0) != std::string::npos));
  55         }
  56
  57
  58         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic)
  59         {
  60                 if (IS_LOCAL(source) && IS_OPER(source) && CanOverride(source, "TOPIC"))
  61                 {
  62                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetPrefixValue(source) < HALFOP_VALUE))
  63                         {
  64                                 ServerInstance->SNO->WriteGlobalSno('v',std::string(source->nick)+" used oper override to change a topic on "+std::string(channel->name));
  65                         }
  66
  67                         // Explicit allow
  68                         return MOD_RES_ALLOW;
  69                 }
  70
  71                 return MOD_RES_PASSTHRU;
  72         }
  73
  74         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason)
  75         {
  76                 if (IS_OPER(source) && CanOverride(source,"KICK"))
  77                 {
  78                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
  79                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
  80                         {
  81                                 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+")");
  82                                 return MOD_RES_ALLOW;
  83                         }
  84                 }
  85                 return MOD_RES_PASSTHRU;
  86         }
  87
  88         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters)
  89         {
  90                 if (!source || !channel)
  91                         return MOD_RES_PASSTHRU;
  92                 if (!IS_OPER(source) || !IS_LOCAL(source))
  93                         return MOD_RES_PASSTHRU;
  94
  95                 unsigned int mode = channel->GetPrefixValue(source);
  96
  97                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
  98                 {
  99                         std::string msg = std::string(source->nick)+" overriding modes:";
 100                         for(unsigned int i=0; i < parameters.size(); i++)
 101                                 msg += " " + parameters[i];
 102                         ServerInstance->SNO->WriteGlobalSno('v',msg);
 103                         return MOD_RES_ALLOW;
 104                 }
 105                 return MOD_RES_PASSTHRU;
 106         }
 107
 108         ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 109         {
 110                 if (IS_LOCAL(user) && IS_OPER(user))
 111                 {
 112                         if (chan)
 113                         {
 114                                 if (chan->IsModeSet('i') && (CanOverride(user,"INVITE")))
 115                                 {
 116                                         irc::string x(chan->name.c_str());
 117                                         if (!IS_LOCAL(user)->IsInvited(x))
 118                                         {
 119                                                 if (RequireKey && keygiven != "override")
 120                                                 {
 121                                                         // Can't join normally -- must use a special key to bypass restrictions
 122                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 123                                                         return MOD_RES_PASSTHRU;
 124                                                 }
 125
 126                                                 if (NoisyOverride)
 127                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 128                                                 ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +i on "+std::string(cname));
 129                                         }
 130                                         return MOD_RES_ALLOW;
 131                                 }
 132
 133                                 if (chan->IsModeSet('k') && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 134                                 {
 135                                         if (RequireKey && keygiven != "override")
 136                                         {
 137                                                 // Can't join normally -- must use a special key to bypass restrictions
 138                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 139                                                 return MOD_RES_PASSTHRU;
 140                                         }
 141
 142                                         if (NoisyOverride)
 143                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 144                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +k on "+std::string(cname));
 145                                         return MOD_RES_ALLOW;
 146                                 }
 147
 148                                 if (chan->IsModeSet('l') && (chan->GetUserCounter() >= atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 149                                 {
 150                                         if (RequireKey && keygiven != "override")
 151                                         {
 152                                                 // Can't join normally -- must use a special key to bypass restrictions
 153                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 154                                                 return MOD_RES_PASSTHRU;
 155                                         }
 156
 157                                         if (NoisyOverride)
 158                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 159                                         ServerInstance->SNO->WriteGlobalSno('v', user->nick+" used oper override to bypass +l on "+std::string(cname));
 160                                         return MOD_RES_ALLOW;
 161                                 }
 162
 163                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 164                                 {
 165                                         if (RequireKey && keygiven != "override")
 166                                         {
 167                                                 // Can't join normally -- must use a special key to bypass restrictions
 168                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 169                                                 return MOD_RES_PASSTHRU;
 170                                         }
 171
 172                                         if (NoisyOverride)
 173                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 174                                         ServerInstance->SNO->WriteGlobalSno('v',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 175                                         return MOD_RES_ALLOW;
 176                                 }
 177                         }
 178                 }
 179                 return MOD_RES_PASSTHRU;
 180         }
 181
 182         Version GetVersion()
 183         {
 184                 return Version("Provides support for unreal-style oper-override",VF_VENDOR);
 185         }
 186 };
 187
 188 MODULE_INIT(ModuleOverride)