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 #include "m_override.h"
  16
  17 /* $ModDesc: Provides support for unreal-style oper-override */
  18
  19 typedef std::map<std::string,std::string> override_t;
  20
  21 class ModuleOverride : public Module
  22 {
  23         override_t overrides;
  24         bool RequireKey;
  25         bool NoisyOverride;
  26
  27  public:
  28
  29         ModuleOverride()
  30                         {
  31                 // read our config options (main config file)
  32                 OnRehash(NULL);
  33                 ServerInstance->SNO->EnableSnomask('G', "GODMODE");
  34                 if (!ServerInstance->Modules->PublishFeature("Override", this))
  35                 {
  36                         throw ModuleException("m_override: Unable to publish feature 'Override'");
  37                 }
  38                 Implementation eventlist[] = { I_OnRehash, I_OnPreMode, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPreTopicChange, I_OnRequest };
  39                 ServerInstance->Modules->Attach(eventlist, this, 7);
  40         }
  41
  42         void OnRehash(User* user)
  43         {
  44                 // on a rehash we delete our classes for good measure and create them again.
  45                 ConfigReader Conf;
  46
  47                 // re-read our config options on a rehash
  48                 NoisyOverride = Conf.ReadFlag("override", "noisy", 0);
  49                 RequireKey = Conf.ReadFlag("override", "requirekey", 0);
  50
  51                 overrides.clear();
  52
  53                 for (int j =0; j < Conf.Enumerate("type"); j++)
  54                 {
  55                         std::string typen = Conf.ReadValue("type","name",j);
  56                         std::string tokenlist = Conf.ReadValue("type","override",j);
  57                         overrides[typen] = tokenlist;
  58                 }
  59         }
  60
  61         void On005Numeric(std::string &output)
  62         {
  63                 output.append(" OVERRIDE");
  64         }
  65
  66         bool CanOverride(User* source, const char* token)
  67         {
  68                 // checks to see if the oper's type has <type:override>
  69                 override_t::iterator j = overrides.find(source->oper);
  70
  71                 if (j != overrides.end())
  72                 {
  73                         // its defined or * is set, return its value as a boolean for if the token is set
  74                         return ((j->second.find(token, 0) != std::string::npos) || (j->second.find("*", 0) != std::string::npos));
  75                 }
  76
  77                 // its not defined at all, count as false
  78                 return false;
  79         }
  80
  81
  82         ModResult OnPreTopicChange(User *source, Channel *channel, const std::string &topic)
  83         {
  84                 if (IS_LOCAL(source) && IS_OPER(source) && CanOverride(source, "TOPIC"))
  85                 {
  86                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetPrefixValue(source) < HALFOP_VALUE))
  87                         {
  88                                 ServerInstance->SNO->WriteGlobalSno('G',std::string(source->nick)+" used oper override to change a topic on "+std::string(channel->name));
  89                         }
  90
  91                         // Explicit allow
  92                         return MOD_RES_ALLOW;
  93                 }
  94
  95                 return MOD_RES_PASSTHRU;
  96         }
  97
  98         ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason)
  99         {
 100                 if (IS_OPER(source) && CanOverride(source,"KICK"))
 101                 {
 102                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
 103                         if ((memb->chan->GetPrefixValue(source) < memb->getRank()) || (memb->chan->GetPrefixValue(source) <= VOICE_VALUE))
 104                         {
 105                                 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+")");
 106                                 return MOD_RES_ALLOW;
 107                         }
 108                 }
 109                 return MOD_RES_PASSTHRU;
 110         }
 111
 112         ModResult OnPreMode(User* source,User* dest,Channel* channel, const std::vector<std::string>& parameters)
 113         {
 114                 if (!IS_OPER(source))
 115                         return MOD_RES_PASSTHRU;
 116                 if (!source || !channel)
 117                         return MOD_RES_PASSTHRU;
 118
 119                 unsigned int mode = 0;
 120                 if (channel->HasUser(source))
 121                         mode = channel->GetPrefixValue(source);
 122
 123                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
 124                 {
 125                         std::string msg = std::string(source->nick)+" overriding modes:";
 126                         for(unsigned int i=0; i < parameters.size(); i++)
 127                                 msg += " " + parameters[i];
 128                         ServerInstance->SNO->WriteGlobalSno('G',msg);
 129                         return MOD_RES_ALLOW;
 130                 }
 131                 return MOD_RES_PASSTHRU;
 132         }
 133
 134         ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 135         {
 136                 if (IS_LOCAL(user) && IS_OPER(user))
 137                 {
 138                         if (chan)
 139                         {
 140                                 if ((chan->modes[CM_INVITEONLY]) && (CanOverride(user,"INVITE")))
 141                                 {
 142                                         irc::string x(chan->name.c_str());
 143                                         if (!user->IsInvited(x))
 144                                         {
 145                                                 if (RequireKey && keygiven != "override")
 146                                                 {
 147                                                         // Can't join normally -- must use a special key to bypass restrictions
 148                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 149                                                         return MOD_RES_PASSTHRU;
 150                                                 }
 151
 152                                                 if (NoisyOverride)
 153                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 154                                                 ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +i on "+std::string(cname));
 155                                         }
 156                                         return MOD_RES_ALLOW;
 157                                 }
 158
 159                                 if ((chan->modes[CM_KEY]) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 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 key", cname, user->nick.c_str());
 170                                         ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +k on "+std::string(cname));
 171                                         return MOD_RES_ALLOW;
 172                                 }
 173
 174                                 if ((chan->modes[CM_LIMIT]) && (chan->GetUserCounter() >= atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 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 the channel limit", cname, user->nick.c_str());
 185                                         ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +l on "+std::string(cname));
 186                                         return MOD_RES_ALLOW;
 187                                 }
 188
 189                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 190                                 {
 191                                         if (RequireKey && keygiven != "override")
 192                                         {
 193                                                 // Can't join normally -- must use a special key to bypass restrictions
 194                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 195                                                 return MOD_RES_PASSTHRU;
 196                                         }
 197
 198                                         if (NoisyOverride)
 199                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 200                                         ServerInstance->SNO->WriteGlobalSno('G',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 201                                         return MOD_RES_ALLOW;
 202                                 }
 203                         }
 204                 }
 205                 return MOD_RES_PASSTHRU;
 206         }
 207
 208         const char* OnRequest(Request* request)
 209         {
 210                 if(strcmp(OVRREQID, request->GetId()) == 0)
 211                 {
 212                         OVRrequest* req = static_cast<OVRrequest*>(request);
 213                         return this->CanOverride(req->requser,req->reqtoken.c_str()) ? "yes":"";
 214                 }
 215                 return NULL;
 216         }
 217
 218         ~ModuleOverride()
 219         {
 220                 ServerInstance->Modules->UnpublishFeature("Override");
 221                 ServerInstance->SNO->DisableSnomask('G');
 222         }
 223
 224         Version GetVersion()
 225         {
 226                 return Version("Provides support for unreal-style oper-override",VF_VENDOR,API_VERSION);
 227         }
 228 };
 229
 230 MODULE_INIT(ModuleOverride)