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 ((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 ((!channel->HasUser(source)) || (mode < STATUS_OP))
 151                                                                 OverDeops++;
 152                                                         return ACR_ALLOW;
 153                                                 }
 154                                                 else
 155                                                 {
 156                                                         return ACR_DEFAULT;
 157                                                 }
 158                                         break;
 159                                         case AC_OP:
 160                                                 if (CanOverride(source,"MODEOP"))
 161                                                 {
 162                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 163                                                                 OverOps++;
 164                                                         return ACR_ALLOW;
 165                                                 }
 166                                                 else
 167                                                 {
 168                                                         return ACR_DEFAULT;
 169                                                 }
 170                                         break;
 171                                         case AC_VOICE:
 172                                                 if (CanOverride(source,"MODEVOICE"))
 173                                                 {
 174                                                         if ((!channel->HasUser(source)) || (mode < STATUS_HOP))
 175                                                                 OverVoices++;
 176                                                         return ACR_ALLOW;
 177                                                 }
 178                                                 else
 179                                                 {
 180                                                         return ACR_DEFAULT;
 181                                                 }
 182                                         break;
 183                                         case AC_DEVOICE:
 184                                                 if (CanOverride(source,"MODEDEVOICE"))
 185                                                 {
 186                                                         if ((!channel->HasUser(source)) || (mode < STATUS_HOP))
 187                                                                 OverDevoices++;
 188                                                         return ACR_ALLOW;
 189                                                 }
 190                                                 else
 191                                                 {
 192                                                         return ACR_DEFAULT;
 193                                                 }
 194                                         break;
 195                                         case AC_HALFOP:
 196                                                 if (CanOverride(source,"MODEHALFOP"))
 197                                                 {
 198                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 199                                                                 OverHalfops++;
 200                                                         return ACR_ALLOW;
 201                                                 }
 202                                                 else
 203                                                 {
 204                                                         return ACR_DEFAULT;
 205                                                 }
 206                                         break;
 207                                         case AC_DEHALFOP:
 208                                                 if (CanOverride(source,"MODEDEHALFOP"))
 209                                                 {
 210                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 211                                                                 OverDehalfops++;
 212                                                         return ACR_ALLOW;
 213                                                 }
 214                                                 else
 215                                                 {
 216                                                         return ACR_DEFAULT;
 217                                                 }
 218                                         break;
 219                                 }
 220
 221                                 if (CanOverride(source,"OTHERMODE"))
 222                                 {
 223                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 224                                         {
 225                                                 OverriddenMode = true;
 226                                                 OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
 227                                         }
 228                                         return ACR_ALLOW;
 229                                 }
 230                                 else
 231                                 {
 232                                         return ACR_DEFAULT;
 233                                 }
 234                         }
 235                 }
 236
 237                 return ACR_DEFAULT;
 238         }
 239
 240         virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 241         {
 242                 if (IS_LOCAL(user) && IS_OPER(user))
 243                 {
 244                         if (chan)
 245                         {
 246                                 if ((chan->modes[CM_INVITEONLY]) && (CanOverride(user,"INVITE")))
 247                                 {
 248                                         irc::string x(chan->name.c_str());
 249                                         if (!user->IsInvited(x))
 250                                         {
 251                                                 if (RequireKey && keygiven != "override")
 252                                                 {
 253                                                         // Can't join normally -- must use a special key to bypass restrictions
 254                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 255                                                         return 1;
 256                                                 }
 257
 258                                                 if (NoisyOverride)
 259                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 260                                                 ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +i on "+std::string(cname));
 261                                         }
 262                                         return -1;
 263                                 }
 264
 265                                 if ((chan->modes[CM_KEY]) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 266                                 {
 267                                         if (RequireKey && keygiven != "override")
 268                                         {
 269                                                 // Can't join normally -- must use a special key to bypass restrictions
 270                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 271                                                 return 1;
 272                                         }
 273
 274                                         if (NoisyOverride)
 275                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 276                                         ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +k on "+std::string(cname));
 277                                         return -1;
 278                                 }
 279
 280                                 if ((chan->modes[CM_LIMIT]) && (chan->GetUserCounter() >=  atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 281                                 {
 282                                         if (RequireKey && keygiven != "override")
 283                                         {
 284                                                 // Can't join normally -- must use a special key to bypass restrictions
 285                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 286                                                 return 1;
 287                                         }
 288
 289                                         if (NoisyOverride)
 290                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 291                                         ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +l on "+std::string(cname));
 292                                         return -1;
 293                                 }
 294
 295                                 if (CanOverride(user,"BANWALK"))
 296                                 {
 297                                         if (chan->IsBanned(user))
 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('O',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 309                                         }
 310                                         return -1;
 311                                 }
 312                         }
 313                 }
 314                 return 0;
 315         }
 316
 317         virtual ~ModuleOverride()
 318         {
 319                 ServerInstance->SNO->DisableSnomask('O');
 320         }
 321
 322         virtual Version GetVersion()
 323         {
 324                 return Version("$Id$",VF_VENDOR,API_VERSION);
 325         }
 326 };
 327
 328 MODULE_INIT(ModuleOverride)