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(InspIRCd* Me)
  30                 : Module(Me)
  31         {
  32                 // read our config options (main config file)
  33                 OnRehash(NULL);
  34                 ServerInstance->SNO->EnableSnomask('G', "GODMODE");
  35                 if (!ServerInstance->Modules->PublishFeature("Override", this))
  36                 {
  37                         throw ModuleException("m_override: Unable to publish feature 'Override'");
  38                 }
  39                 Implementation eventlist[] = { I_OnRehash, I_OnPreMode, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPreTopicChange, I_OnRequest };
  40                 ServerInstance->Modules->Attach(eventlist, this, 7);
  41         }
  42
  43         void OnRehash(User* user)
  44         {
  45                 // on a rehash we delete our classes for good measure and create them again.
  46                 ConfigReader Conf(ServerInstance);
  47
  48                 // re-read our config options on a rehash
  49                 NoisyOverride = Conf.ReadFlag("override", "noisy", 0);
  50                 RequireKey = Conf.ReadFlag("override", "requirekey", 0);
  51
  52                 overrides.clear();
  53
  54                 for (int j =0; j < Conf.Enumerate("type"); j++)
  55                 {
  56                         std::string typen = Conf.ReadValue("type","name",j);
  57                         std::string tokenlist = Conf.ReadValue("type","override",j);
  58                         overrides[typen] = tokenlist;
  59                 }
  60         }
  61
  62         void On005Numeric(std::string &output)
  63         {
  64                 output.append(" OVERRIDE");
  65         }
  66
  67         bool CanOverride(User* source, const char* token)
  68         {
  69                 // checks to see if the oper's type has <type:override>
  70                 override_t::iterator j = overrides.find(source->oper);
  71
  72                 if (j != overrides.end())
  73                 {
  74                         // its defined or * is set, return its value as a boolean for if the token is set
  75                         return ((j->second.find(token, 0) != std::string::npos) || (j->second.find("*", 0) != std::string::npos));
  76                 }
  77
  78                 // its not defined at all, count as false
  79                 return false;
  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('G',std::string(source->nick)+" used oper override to change a topic on "+std::string(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('G',std::string(source->nick)+" used oper override to kick "+std::string(memb->user->nick)+" on "+std::string(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 (!IS_OPER(source))
 116                         return MOD_RES_PASSTHRU;
 117                 if (!source || !channel)
 118                         return MOD_RES_PASSTHRU;
 119
 120                 unsigned int mode = 0;
 121                 if (channel->HasUser(source))
 122                         mode = channel->GetPrefixValue(source);
 123
 124                 if (mode < HALFOP_VALUE && CanOverride(source, "MODE"))
 125                 {
 126                         std::string msg = std::string(source->nick)+" overriding modes:";
 127                         for(unsigned int i=0; i < parameters.size(); i++)
 128                                 msg += " " + parameters[i];
 129                         ServerInstance->SNO->WriteGlobalSno('G',msg);
 130                         return MOD_RES_ALLOW;
 131                 }
 132                 return MOD_RES_PASSTHRU;
 133         }
 134
 135         ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 136         {
 137                 if (IS_LOCAL(user) && IS_OPER(user))
 138                 {
 139                         if (chan)
 140                         {
 141                                 if ((chan->modes[CM_INVITEONLY]) && (CanOverride(user,"INVITE")))
 142                                 {
 143                                         irc::string x(chan->name.c_str());
 144                                         if (!user->IsInvited(x))
 145                                         {
 146                                                 if (RequireKey && keygiven != "override")
 147                                                 {
 148                                                         // Can't join normally -- must use a special key to bypass restrictions
 149                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 150                                                         return MOD_RES_PASSTHRU;
 151                                                 }
 152
 153                                                 if (NoisyOverride)
 154                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 155                                                 ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +i on "+std::string(cname));
 156                                         }
 157                                         return MOD_RES_ALLOW;
 158                                 }
 159
 160                                 if ((chan->modes[CM_KEY]) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 161                                 {
 162                                         if (RequireKey && keygiven != "override")
 163                                         {
 164                                                 // Can't join normally -- must use a special key to bypass restrictions
 165                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 166                                                 return MOD_RES_PASSTHRU;
 167                                         }
 168
 169                                         if (NoisyOverride)
 170                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 171                                         ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +k on "+std::string(cname));
 172                                         return MOD_RES_ALLOW;
 173                                 }
 174
 175                                 if ((chan->modes[CM_LIMIT]) && (chan->GetUserCounter() >= atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 176                                 {
 177                                         if (RequireKey && keygiven != "override")
 178                                         {
 179                                                 // Can't join normally -- must use a special key to bypass restrictions
 180                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 181                                                 return MOD_RES_PASSTHRU;
 182                                         }
 183
 184                                         if (NoisyOverride)
 185                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 186                                         ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +l on "+std::string(cname));
 187                                         return MOD_RES_ALLOW;
 188                                 }
 189
 190                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 191                                 {
 192                                         if (RequireKey && keygiven != "override")
 193                                         {
 194                                                 // Can't join normally -- must use a special key to bypass restrictions
 195                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 196                                                 return MOD_RES_PASSTHRU;
 197                                         }
 198
 199                                         if (NoisyOverride)
 200                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 201                                         ServerInstance->SNO->WriteGlobalSno('G',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 202                                         return MOD_RES_ALLOW;
 203                                 }
 204                         }
 205                 }
 206                 return MOD_RES_PASSTHRU;
 207         }
 208
 209         const char* OnRequest(Request* request)
 210         {
 211                 if(strcmp(OVRREQID, request->GetId()) == 0)
 212                 {
 213                         OVRrequest* req = static_cast<OVRrequest*>(request);
 214                         return this->CanOverride(req->requser,req->reqtoken.c_str()) ? "yes":"";
 215                 }
 216                 return NULL;
 217         }
 218
 219         ~ModuleOverride()
 220         {
 221                 ServerInstance->Modules->UnpublishFeature("Override");
 222                 ServerInstance->SNO->DisableSnomask('G');
 223         }
 224
 225         Version GetVersion()
 226         {
 227                 return Version("Provides support for unreal-style oper-override",VF_VENDOR,API_VERSION);
 228         }
 229 };
 230
 231 MODULE_INIT(ModuleOverride)