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         override_t overrides;
  23         bool RequireKey;
  24         bool NoisyOverride;
  25         bool OverriddenMode;
  26         int OverOps, OverDeops, OverVoices, OverDevoices, OverHalfops, OverDehalfops;
  27
  28  public:
  29
  30         ModuleOverride(InspIRCd* Me)
  31                 : Module(Me)
  32         {
  33                 // read our config options (main config file)
  34                 OnRehash(NULL,"");
  35                 ServerInstance->SNO->EnableSnomask('G', "GODMODE");
  36                 OverriddenMode = false;
  37                 OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
  38                 Implementation eventlist[] = { I_OnRehash, I_OnAccessCheck, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPostCommand, I_OnLocalTopicChange };
  39                 ServerInstance->Modules->Attach(eventlist, this, 7);
  40         }
  41
  42         virtual void OnRehash(User* user, const std::string &parameter)
  43         {
  44                 // on a rehash we delete our classes for good measure and create them again.
  45                 ConfigReader* Conf = new ConfigReader(ServerInstance);
  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                 delete Conf;
  61         }
  62
  63
  64         virtual void OnPostCommand(const std::string &command, const std::vector<std::string> &parameters, User *user, CmdResult result, const std::string &original_line)
  65         {
  66                 if ((OverriddenMode) && (irc::string(command.c_str()) == "MODE") && (result == CMD_SUCCESS))
  67                 {
  68                         int Total = OverOps + OverDeops + OverVoices + OverDevoices + OverHalfops + OverDehalfops;
  69                         if (Total == 0)
  70                                 return;
  71
  72                         ServerInstance->SNO->WriteToSnoMask('G',std::string(user->nick)+" Overriding modes: "+ServerInstance->Modes->GetLastParse()+" "+(Total ? "[Detail: " : "")+
  73                                         (OverOps ? ConvToStr(OverOps)+" op"+(OverOps != 1 ? "s" : "")+" " : "")+
  74                                         (OverDeops ? ConvToStr(OverDeops)+" deop"+(OverDeops != 1 ? "s" : "")+" " : "")+
  75                                         (OverVoices ? ConvToStr(OverVoices)+" voice"+(OverVoices != 1 ? "s" : "")+" " : "")+
  76                                         (OverDevoices ? ConvToStr(OverDevoices)+" devoice"+(OverDevoices != 1 ? "s" : "")+" " : "")+
  77                                         (OverHalfops ? ConvToStr(OverHalfops)+" halfop"+(OverHalfops != 1 ? "s" : "")+" " : "")+
  78                                         (OverDehalfops ? ConvToStr(OverDehalfops)+" dehalfop"+(OverDehalfops != 1 ? "s" : "") : "")
  79                                         +(Total ? "]" : ""));
  80
  81                         OverriddenMode = false;
  82                         OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
  83                 }
  84         }
  85
  86         virtual void On005Numeric(std::string &output)
  87         {
  88                 output.append(" OVERRIDE");
  89         }
  90
  91         virtual bool CanOverride(User* source, const char* token)
  92         {
  93                 // checks to see if the oper's type has <type:override>
  94                 override_t::iterator j = overrides.find(source->oper);
  95
  96                 if (j != overrides.end())
  97                 {
  98                         // its defined or * is set, return its value as a boolean for if the token is set
  99                         return ((j->second.find(token, 0) != std::string::npos) || (j->second.find("*", 0) != std::string::npos));
 100                 }
 101
 102                 // its not defined at all, count as false
 103                 return false;
 104         }
 105
 106
 107         virtual int OnLocalTopicChange(User *source, Channel *channel, const std::string &topic)
 108         {
 109                 if (IS_OPER(source) && CanOverride(source, "TOPIC"))
 110                 {
 111                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetStatus(source) < STATUS_HOP))
 112                         {
 113                                 ServerInstance->SNO->WriteToSnoMask('G',std::string(source->nick)+"  used oper override to change a topic on "+std::string(channel->name));
 114                         }
 115
 116                         // Explicit allow
 117                         return -1;
 118                 }
 119
 120                 return 0;
 121         }
 122
 123         virtual int OnUserPreKick(User* source, User* user, Channel* chan, const std::string &reason)
 124         {
 125                 if (IS_OPER(source) && CanOverride(source,"KICK"))
 126                 {
 127                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
 128                         if ((chan->GetStatus(source) < chan->GetStatus(user))                   || (chan->GetStatus(source) <= STATUS_VOICE))
 129                         {
 130                                 ServerInstance->SNO->WriteToSnoMask('G',std::string(source->nick)+" used oper override to kick "+std::string(user->nick)+" on "+std::string(chan->name)+" ("+reason+")");
 131                         }
 132                         /* Returning -1 explicitly allows the kick */
 133                         return -1;
 134                 }
 135                 return 0;
 136         }
 137
 138         virtual int OnAccessCheck(User* source,User* dest,Channel* channel,int access_type)
 139         {
 140                 if (IS_OPER(source))
 141                 {
 142                         if (source && channel)
 143                         {
 144                                 // Fix by brain - allow the change if they arent on channel - rely on boolean short-circuit
 145                                 // to not check the other items in the statement if they arent on the channel
 146                                 int mode = channel->GetStatus(source);
 147                                 switch (access_type)
 148                                 {
 149                                         case AC_DEOP:
 150                                                 if (CanOverride(source,"MODEDEOP"))
 151                                                 {
 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 ((!channel->HasUser(source)) || (mode < STATUS_OP))
 165                                                                 OverOps++;
 166                                                         return ACR_ALLOW;
 167                                                 }
 168                                                 else
 169                                                 {
 170                                                         return ACR_DEFAULT;
 171                                                 }
 172                                         break;
 173                                         case AC_VOICE:
 174                                                 if (CanOverride(source,"MODEVOICE"))
 175                                                 {
 176                                                         if ((!channel->HasUser(source)) || (mode < STATUS_HOP))
 177                                                                 OverVoices++;
 178                                                         return ACR_ALLOW;
 179                                                 }
 180                                                 else
 181                                                 {
 182                                                         return ACR_DEFAULT;
 183                                                 }
 184                                         break;
 185                                         case AC_DEVOICE:
 186                                                 if (CanOverride(source,"MODEDEVOICE"))
 187                                                 {
 188                                                         if ((!channel->HasUser(source)) || (mode < STATUS_HOP))
 189                                                                 OverDevoices++;
 190                                                         return ACR_ALLOW;
 191                                                 }
 192                                                 else
 193                                                 {
 194                                                         return ACR_DEFAULT;
 195                                                 }
 196                                         break;
 197                                         case AC_HALFOP:
 198                                                 if (CanOverride(source,"MODEHALFOP"))
 199                                                 {
 200                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 201                                                                 OverHalfops++;
 202                                                         return ACR_ALLOW;
 203                                                 }
 204                                                 else
 205                                                 {
 206                                                         return ACR_DEFAULT;
 207                                                 }
 208                                         break;
 209                                         case AC_DEHALFOP:
 210                                                 if (CanOverride(source,"MODEDEHALFOP"))
 211                                                 {
 212                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 213                                                                 OverDehalfops++;
 214                                                         return ACR_ALLOW;
 215                                                 }
 216                                                 else
 217                                                 {
 218                                                         return ACR_DEFAULT;
 219                                                 }
 220                                         break;
 221                                 }
 222
 223                                 if (CanOverride(source,"OTHERMODE"))
 224                                 {
 225                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 226                                         {
 227                                                 OverriddenMode = true;
 228                                                 OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
 229                                         }
 230                                         return ACR_ALLOW;
 231                                 }
 232                                 else
 233                                 {
 234                                         return ACR_DEFAULT;
 235                                 }
 236                         }
 237                 }
 238
 239                 return ACR_DEFAULT;
 240         }
 241
 242         virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 243         {
 244                 if (IS_LOCAL(user) && IS_OPER(user))
 245                 {
 246                         if (chan)
 247                         {
 248                                 if ((chan->modes[CM_INVITEONLY]) && (CanOverride(user,"INVITE")))
 249                                 {
 250                                         irc::string x(chan->name.c_str());
 251                                         if (!user->IsInvited(x))
 252                                         {
 253                                                 if (RequireKey && keygiven != "override")
 254                                                 {
 255                                                         // Can't join normally -- must use a special key to bypass restrictions
 256                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 257                                                         return 1;
 258                                                 }
 259
 260                                                 if (NoisyOverride)
 261                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 262                                                 ServerInstance->SNO->WriteToSnoMask('G', user->nick+" used oper override to bypass +i on "+std::string(cname));
 263                                         }
 264                                         return -1;
 265                                 }
 266
 267                                 if ((chan->modes[CM_KEY]) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 268                                 {
 269                                         if (RequireKey && keygiven != "override")
 270                                         {
 271                                                 // Can't join normally -- must use a special key to bypass restrictions
 272                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 273                                                 return 1;
 274                                         }
 275
 276                                         if (NoisyOverride)
 277                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 278                                         ServerInstance->SNO->WriteToSnoMask('G', user->nick+" used oper override to bypass +k on "+std::string(cname));
 279                                         return -1;
 280                                 }
 281
 282                                 if ((chan->modes[CM_LIMIT]) && (chan->GetUserCounter() >=  atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 283                                 {
 284                                         if (RequireKey && keygiven != "override")
 285                                         {
 286                                                 // Can't join normally -- must use a special key to bypass restrictions
 287                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 288                                                 return 1;
 289                                         }
 290
 291                                         if (NoisyOverride)
 292                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 293                                         ServerInstance->SNO->WriteToSnoMask('G', user->nick+" used oper override to bypass +l on "+std::string(cname));
 294                                         return -1;
 295                                 }
 296
 297                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 298                                 {
 299                                         if (RequireKey && keygiven != "override")
 300                                         {
 301                                                 // Can't join normally -- must use a special key to bypass restrictions
 302                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 303                                                 return 1;
 304                                         }
 305
 306                                         if (NoisyOverride)
 307                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 308                                         ServerInstance->SNO->WriteToSnoMask('G',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 309                                         return -1;
 310                                 }
 311                         }
 312                 }
 313                 return 0;
 314         }
 315
 316         virtual ~ModuleOverride()
 317         {
 318                 ServerInstance->SNO->DisableSnomask('G');
 319         }
 320
 321         virtual Version GetVersion()
 322         {
 323                 return Version("$Id$",VF_VENDOR,API_VERSION);
 324         }
 325 };
 326
 327 MODULE_INIT(ModuleOverride)