src/modules/m_override.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 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 typedef std::map<std::string,std::string> override_t;
  19
  20 class ModuleOverride : public Module
  21 {
  22         override_t overrides;
  23         bool RequireKey;
  24         bool NoisyOverride;
  25
  26  public:
  27
  28         ModuleOverride()
  29                         {
  30                 // read our config options (main config file)
  31                 OnRehash(NULL);
  32                 ServerInstance->SNO->EnableSnomask('G', "GODMODE");
  33                 Implementation eventlist[] = { I_OnRehash, I_OnPreMode, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPreTopicChange };
  34                 ServerInstance->Modules->Attach(eventlist, this, 6);
  35         }
  36
  37         void OnRehash(User* user)
  38         {
  39                 // on a rehash we delete our classes for good measure and create them again.
  40                 ConfigReader Conf;
  41
  42                 // re-read our config options on a rehash
  43                 NoisyOverride = Conf.ReadFlag("override", "noisy", 0);
  44                 RequireKey = Conf.ReadFlag("override", "requirekey", 0);
  45
  46                 overrides.clear();
  47
  48                 for (int j =0; j < Conf.Enumerate("type"); j++)
  49                 {
  50                         std::string typen = Conf.ReadValue("type","name",j);
  51                         std::string tokenlist = Conf.ReadValue("type","override",j);
  52                         overrides[typen] = tokenlist;
  53                 }
  54         }
  55
  56         void On005Numeric(std::string &output)
  57         {
  58                 output.append(" OVERRIDE");
  59         }
  60
  61         bool CanOverride(User* source, const char* token)
  62         {
  63                 // checks to see if the oper's type has <type:override>
  64                 override_t::iterator j = overrides.find(source->oper);
  65
  66                 if (j != overrides.end())
  67                 {
  68                         // its defined or * is set, return its value as a boolean for if the token is set
  69                         return ((j->second.find(token, 0) != std::string::npos) || (j->second.find("*", 0) != std::string::npos));
  70                 }
  71
  72                 // its not defined at all, count as false
  73                 return false;
  74         }
  75
  76
  77         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic)
  78         {
  79                 if (IS_LOCAL(source) && IS_OPER(source) && CanOverride(source, "TOPIC"))
  80                 {
  81                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetPrefixValue(source) < HALFOP_VALUE))
  82                         {
  83                                 ServerInstance->SNO->WriteGlobalSno('G',std::string(source->nick)+" used oper override to change a topic on "+std::string(channel->name));
  84                         }
  85
  86                         // Explicit allow
  87                         return MOD_RES_ALLOW;
  88                 }
  89
  90                 return MOD_RES_PASSTHRU;
  91         }
  92
  93         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason)
  94         {
  95                 if (IS_OPER(source) && CanOverride(source,"KICK"))
  96                 {
  97                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
  98                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
  99                         {
 100                                 ServerInstance->SNO->WriteGlobalSno('G',std::string(source->nick)+" used oper override to kick "+std::string(memb->user->nick)+" on "+std::string(memb->chan->name)+" ("+reason+")");
 101                                 return MOD_RES_ALLOW;
 102                         }
 103                 }
 104                 return MOD_RES_PASSTHRU;
 105         }
 106
 107         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters)
 108         {
 109                 if (!IS_OPER(source))
 110                         return MOD_RES_PASSTHRU;
 111                 if (!source || !channel)
 112                         return MOD_RES_PASSTHRU;
 113
 114                 unsigned int mode = 0;
 115                 if (channel->HasUser(source))
 116                         mode = channel->GetPrefixValue(source);
 117
 118                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
 119                 {
 120                         std::string msg = std::string(source->nick)+" overriding modes:";
 121                         for(unsigned int i=0; i < parameters.size(); i++)
 122                                 msg += " " + parameters[i];
 123                         ServerInstance->SNO->WriteGlobalSno('G',msg);
 124                         return MOD_RES_ALLOW;
 125                 }
 126                 return MOD_RES_PASSTHRU;
 127         }
 128
 129         ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 130         {
 131                 if (IS_LOCAL(user) && IS_OPER(user))
 132                 {
 133                         if (chan)
 134                         {
 135                                 if ((chan->modes[CM_INVITEONLY]) && (CanOverride(user,"INVITE")))
 136                                 {
 137                                         irc::string x(chan->name.c_str());
 138                                         if (!IS_LOCAL(user)->IsInvited(x))
 139                                         {
 140                                                 if (RequireKey && keygiven != "override")
 141                                                 {
 142                                                         // Can't join normally -- must use a special key to bypass restrictions
 143                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 144                                                         return MOD_RES_PASSTHRU;
 145                                                 }
 146
 147                                                 if (NoisyOverride)
 148                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 149                                                 ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +i on "+std::string(cname));
 150                                         }
 151                                         return MOD_RES_ALLOW;
 152                                 }
 153
 154                                 if ((chan->modes[CM_KEY]) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 155                                 {
 156                                         if (RequireKey && keygiven != "override")
 157                                         {
 158                                                 // Can't join normally -- must use a special key to bypass restrictions
 159                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 160                                                 return MOD_RES_PASSTHRU;
 161                                         }
 162
 163                                         if (NoisyOverride)
 164                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 165                                         ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +k on "+std::string(cname));
 166                                         return MOD_RES_ALLOW;
 167                                 }
 168
 169                                 if ((chan->modes[CM_LIMIT]) && (chan->GetUserCounter() >= atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 170                                 {
 171                                         if (RequireKey && keygiven != "override")
 172                                         {
 173                                                 // Can't join normally -- must use a special key to bypass restrictions
 174                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 175                                                 return MOD_RES_PASSTHRU;
 176                                         }
 177
 178                                         if (NoisyOverride)
 179                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 180                                         ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +l on "+std::string(cname));
 181                                         return MOD_RES_ALLOW;
 182                                 }
 183
 184                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 185                                 {
 186                                         if (RequireKey && keygiven != "override")
 187                                         {
 188                                                 // Can't join normally -- must use a special key to bypass restrictions
 189                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 190                                                 return MOD_RES_PASSTHRU;
 191                                         }
 192
 193                                         if (NoisyOverride)
 194                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName.c_str(), "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 195                                         ServerInstance->SNO->WriteGlobalSno('G',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 196                                         return MOD_RES_ALLOW;
 197                                 }
 198                         }
 199                 }
 200                 return MOD_RES_PASSTHRU;
 201         }
 202
 203         ~ModuleOverride()
 204         {
 205                 ServerInstance->SNO->DisableSnomask('G');
 206         }
 207
 208         Version GetVersion()
 209         {
 210                 return Version("Provides support for unreal-style oper-override",VF_VENDOR);
 211         }
 212 };
 213
 214 MODULE_INIT(ModuleOverride)