src/modules/m_override.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/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
  23         override_t overrides;
  24         bool RequireKey;
  25         bool NoisyOverride;
  26         bool OverriddenMode;
  27         int OverOps, OverDeops, OverVoices, OverDevoices, OverHalfops, OverDehalfops;
  28
  29  public:
  30
  31         ModuleOverride(InspIRCd* Me)
  32                 : Module(Me)
  33         {
  34                 // read our config options (main config file)
  35                 OnRehash(NULL,"");
  36                 ServerInstance->SNO->EnableSnomask('O', "OVERRIDE");
  37                 OverriddenMode = false;
  38                 OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
  39                 Implementation eventlist[] = { I_OnRehash, I_OnAccessCheck, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPostCommand, I_OnLocalTopicChange };
  40                 ServerInstance->Modules->Attach(eventlist, this, 7);
  41         }
  42
  43         virtual void OnRehash(User* user, const std::string &parameter)
  44         {
  45                 // on a rehash we delete our classes for good measure and create them again.
  46                 ConfigReader* Conf = new ConfigReader(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                 delete Conf;
  62         }
  63
  64
  65         virtual void OnPostCommand(const std::string &command, const std::vector<std::string> &parameters, User *user, CmdResult result, const std::string &original_line)
  66         {
  67                 if ((NoisyOverride) && (OverriddenMode) && (irc::string(command.c_str()) == "MODE") && (result == CMD_SUCCESS))
  68                 {
  69                         int Total = OverOps + OverDeops + OverVoices + OverDevoices + OverHalfops + OverDehalfops;
  70
  71                         ServerInstance->SNO->WriteToSnoMask('O',std::string(user->nick)+" Overriding modes: "+ServerInstance->Modes->GetLastParse()+" "+(Total ? "[Detail: " : "")+
  72                                         (OverOps ? ConvToStr(OverOps)+" op"+(OverOps != 1 ? "s" : "")+" " : "")+
  73                                         (OverDeops ? ConvToStr(OverDeops)+" deop"+(OverDeops != 1 ? "s" : "")+" " : "")+
  74                                         (OverVoices ? ConvToStr(OverVoices)+" voice"+(OverVoices != 1 ? "s" : "")+" " : "")+
  75                                         (OverDevoices ? ConvToStr(OverDevoices)+" devoice"+(OverDevoices != 1 ? "s" : "")+" " : "")+
  76                                         (OverHalfops ? ConvToStr(OverHalfops)+" halfop"+(OverHalfops != 1 ? "s" : "")+" " : "")+
  77                                         (OverDehalfops ? ConvToStr(OverDehalfops)+" dehalfop"+(OverDehalfops != 1 ? "s" : "") : "")
  78                                         +(Total ? "]" : ""));
  79
  80                         OverriddenMode = false;
  81                         OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
  82                 }
  83         }
  84
  85         virtual void On005Numeric(std::string &output)
  86         {
  87                 output.append(" OVERRIDE");
  88         }
  89
  90         virtual bool CanOverride(User* source, const char* token)
  91         {
  92                 // checks to see if the oper's type has <type:override>
  93                 override_t::iterator j = overrides.find(source->oper);
  94
  95                 if (j != overrides.end())
  96                 {
  97                         // its defined or * is set, return its value as a boolean for if the token is set
  98                         return ((j->second.find(token, 0) != std::string::npos) || (j->second.find("*", 0) != std::string::npos));
  99                 }
 100
 101                 // its not defined at all, count as false
 102                 return false;
 103         }
 104
 105
 106         virtual int OnLocalTopicChange(User *source, Channel *channel, const std::string &topic)
 107         {
 108                 if (IS_OPER(source) && CanOverride(source, "TOPIC"))
 109                 {
 110                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetStatus(source) < STATUS_HOP))
 111                         {
 112                                 ServerInstance->SNO->WriteToSnoMask('O',std::string(source->nick)+"  used oper override to change a topic on "+std::string(channel->name));
 113                         }
 114
 115                         // Explicit allow
 116                         return -1;
 117                 }
 118
 119                 return 0;
 120         }
 121
 122         virtual int OnUserPreKick(User* source, User* user, Channel* chan, const std::string &reason)
 123         {
 124                 if (IS_OPER(source) && CanOverride(source,"KICK"))
 125                 {
 126                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
 127                         if ((chan->GetStatus(source) < chan->GetStatus(user))                   || (chan->GetStatus(source) <= STATUS_VOICE))
 128                         {
 129                                 ServerInstance->SNO->WriteToSnoMask('O',std::string(source->nick)+" used oper override to kick "+std::string(user->nick)+" on "+std::string(chan->name)+" ("+reason+")");
 130                         }
 131                         /* Returning -1 explicitly allows the kick */
 132                         return -1;
 133                 }
 134                 return 0;
 135         }
 136
 137         virtual int OnAccessCheck(User* source,User* dest,Channel* channel,int access_type)
 138         {
 139                 if (IS_OPER(source))
 140                 {
 141                         if (source && channel)
 142                         {
 143                                 // Fix by brain - allow the change if they arent on channel - rely on boolean short-circuit
 144                                 // to not check the other items in the statement if they arent on the channel
 145                                 int mode = channel->GetStatus(source);
 146                                 switch (access_type)
 147                                 {
 148                                         case AC_DEOP:
 149                                                 if (CanOverride(source,"MODEDEOP"))
 150                                                 {
 151                                                         if (NoisyOverride)
 152                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 153                                                                 OverDeops++;
 154                                                         return ACR_ALLOW;
 155                                                 }
 156                                                 else
 157                                                 {
 158                                                         return ACR_DEFAULT;
 159                                                 }
 160                                         break;
 161                                         case AC_OP:
 162                                                 if (CanOverride(source,"MODEOP"))
 163                                                 {
 164                                                         if (NoisyOverride)
 165                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 166                                                                 OverOps++;
 167                                                         return ACR_ALLOW;
 168                                                 }
 169                                                 else
 170                                                 {
 171                                                         return ACR_DEFAULT;
 172                                                 }
 173                                         break;
 174                                         case AC_VOICE:
 175                                                 if (CanOverride(source,"MODEVOICE"))
 176                                                 {
 177                                                         if (NoisyOverride)
 178                                                         if ((!channel->HasUser(source)) || (mode < STATUS_HOP))
 179                                                                 OverVoices++;
 180                                                         return ACR_ALLOW;
 181                                                 }
 182                                                 else
 183                                                 {
 184                                                         return ACR_DEFAULT;
 185                                                 }
 186                                         break;
 187                                         case AC_DEVOICE:
 188                                                 if (CanOverride(source,"MODEDEVOICE"))
 189                                                 {
 190                                                         if (NoisyOverride)
 191                                                         if ((!channel->HasUser(source)) || (mode < STATUS_HOP))
 192                                                                 OverDevoices++;
 193                                                         return ACR_ALLOW;
 194                                                 }
 195                                                 else
 196                                                 {
 197                                                         return ACR_DEFAULT;
 198                                                 }
 199                                         break;
 200                                         case AC_HALFOP:
 201                                                 if (CanOverride(source,"MODEHALFOP"))
 202                                                 {
 203                                                         if (NoisyOverride)
 204                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 205                                                                 OverHalfops++;
 206                                                         return ACR_ALLOW;
 207                                                 }
 208                                                 else
 209                                                 {
 210                                                         return ACR_DEFAULT;
 211                                                 }
 212                                         break;
 213                                         case AC_DEHALFOP:
 214                                                 if (CanOverride(source,"MODEDEHALFOP"))
 215                                                 {
 216                                                         if (NoisyOverride)
 217                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 218                                                                 OverDehalfops++;
 219                                                         return ACR_ALLOW;
 220                                                 }
 221                                                 else
 222                                                 {
 223                                                         return ACR_DEFAULT;
 224                                                 }
 225                                         break;
 226                                 }
 227
 228                                 if (CanOverride(source,"OTHERMODE"))
 229                                 {
 230                                         if (NoisyOverride)
 231                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 232                                         {
 233                                                 OverriddenMode = true;
 234                                                 OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
 235                                         }
 236                                         return ACR_ALLOW;
 237                                 }
 238                                 else
 239                                 {
 240                                         return ACR_DEFAULT;
 241                                 }
 242                         }
 243                 }
 244
 245                 return ACR_DEFAULT;
 246         }
 247
 248         virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 249         {
 250                 if (IS_LOCAL(user) && IS_OPER(user))
 251                 {
 252                         if (chan)
 253                         {
 254                                 if ((chan->modes[CM_INVITEONLY]) && (CanOverride(user,"INVITE")))
 255                                 {
 256                                         irc::string x(chan->name.c_str());
 257                                         if (!user->IsInvited(x))
 258                                         {
 259                                                 if (RequireKey && keygiven != "override")
 260                                                 {
 261                                                         // Can't join normally -- must use a special key to bypass restrictions
 262                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 263                                                         return 1;
 264                                                 }
 265
 266                                                 if (NoisyOverride)
 267                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 268                                                 ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +i on "+std::string(cname));
 269                                         }
 270                                         return -1;
 271                                 }
 272
 273                                 if ((chan->modes[CM_KEY]) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 274                                 {
 275                                         if (RequireKey && keygiven != "override")
 276                                         {
 277                                                 // Can't join normally -- must use a special key to bypass restrictions
 278                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 279                                                 return 1;
 280                                         }
 281
 282                                         if (NoisyOverride)
 283                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 284                                         ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +k on "+std::string(cname));
 285                                         return -1;
 286                                 }
 287
 288                                 if ((chan->modes[CM_LIMIT]) && (chan->GetUserCounter() >=  atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 289                                 {
 290                                         if (RequireKey && keygiven != "override")
 291                                         {
 292                                                 // Can't join normally -- must use a special key to bypass restrictions
 293                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 294                                                 return 1;
 295                                         }
 296
 297                                         if (NoisyOverride)
 298                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 299                                         ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +l on "+std::string(cname));
 300                                         return -1;
 301                                 }
 302
 303                                 if (CanOverride(user,"BANWALK"))
 304                                 {
 305                                         if (chan->IsBanned(user))
 306                                         {
 307                                                 if (RequireKey && keygiven != "override")
 308                                                 {
 309                                                         // Can't join normally -- must use a special key to bypass restrictions
 310                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 311                                                         return 1;
 312                                                 }
 313
 314                                                 if (NoisyOverride)
 315                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 316                                                 ServerInstance->SNO->WriteToSnoMask('O',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 317                                         }
 318                                         return -1;
 319                                 }
 320                         }
 321                 }
 322                 return 0;
 323         }
 324
 325         virtual ~ModuleOverride()
 326         {
 327                 ServerInstance->SNO->DisableSnomask('O');
 328         }
 329
 330         virtual Version GetVersion()
 331         {
 332                 return Version(1,2,0,1,VF_VENDOR,API_VERSION);
 333         }
 334 };
 335
 336 MODULE_INIT(ModuleOverride)