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