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 #include "wildcard.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
  24         override_t overrides;
  25         bool RequireKey;
  26         bool NoisyOverride;
  27         bool OverriddenMode;
  28         int OverOps, OverDeops, OverVoices, OverDevoices, OverHalfops, OverDehalfops;
  29
  30  public:
  31
  32         ModuleOverride(InspIRCd* Me)
  33                 : Module(Me)
  34         {
  35                 // read our config options (main config file)
  36                 OnRehash(NULL,"");
  37                 ServerInstance->SNO->EnableSnomask('O', "OVERRIDE");
  38                 OverriddenMode = false;
  39                 OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
  40                 Implementation eventlist[] = { I_OnRehash, I_OnAccessCheck, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPostCommand, I_OnLocalTopicChange };
  41                 ServerInstance->Modules->Attach(eventlist, this, 7);
  42         }
  43
  44         virtual void OnRehash(User* user, const std::string &parameter)
  45         {
  46                 // on a rehash we delete our classes for good measure and create them again.
  47                 ConfigReader* Conf = new ConfigReader(ServerInstance);
  48
  49                 // re-read our config options on a rehash
  50                 NoisyOverride = Conf->ReadFlag("override", "noisy", 0);
  51                 RequireKey = Conf->ReadFlag("override", "requirekey", 0);
  52
  53                 overrides.clear();
  54
  55                 for (int j =0; j < Conf->Enumerate("type"); j++)
  56                 {
  57                         std::string typen = Conf->ReadValue("type","name",j);
  58                         std::string tokenlist = Conf->ReadValue("type","override",j);
  59                         overrides[typen] = tokenlist;
  60                 }
  61
  62                 delete Conf;
  63         }
  64
  65
  66         virtual void OnPostCommand(const std::string &command, const std::vector<std::string> &parameters, User *user, CmdResult result, const std::string &original_line)
  67         {
  68                 if ((NoisyOverride) && (OverriddenMode) && (irc::string(command.c_str()) == "MODE") && (result == CMD_SUCCESS))
  69                 {
  70                         int Total = OverOps + OverDeops + OverVoices + OverDevoices + OverHalfops + OverDehalfops;
  71
  72                         ServerInstance->SNO->WriteToSnoMask('O',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('O',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('O',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 (NoisyOverride)
 153                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 154                                                                 OverDeops++;
 155                                                         return ACR_ALLOW;
 156                                                 }
 157                                                 else
 158                                                 {
 159                                                         return ACR_DEFAULT;
 160                                                 }
 161                                         break;
 162                                         case AC_OP:
 163                                                 if (CanOverride(source,"MODEOP"))
 164                                                 {
 165                                                         if (NoisyOverride)
 166                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 167                                                                 OverOps++;
 168                                                         return ACR_ALLOW;
 169                                                 }
 170                                                 else
 171                                                 {
 172                                                         return ACR_DEFAULT;
 173                                                 }
 174                                         break;
 175                                         case AC_VOICE:
 176                                                 if (CanOverride(source,"MODEVOICE"))
 177                                                 {
 178                                                         if (NoisyOverride)
 179                                                         if ((!channel->HasUser(source)) || (mode < STATUS_HOP))
 180                                                                 OverVoices++;
 181                                                         return ACR_ALLOW;
 182                                                 }
 183                                                 else
 184                                                 {
 185                                                         return ACR_DEFAULT;
 186                                                 }
 187                                         break;
 188                                         case AC_DEVOICE:
 189                                                 if (CanOverride(source,"MODEDEVOICE"))
 190                                                 {
 191                                                         if (NoisyOverride)
 192                                                         if ((!channel->HasUser(source)) || (mode < STATUS_HOP))
 193                                                                 OverDevoices++;
 194                                                         return ACR_ALLOW;
 195                                                 }
 196                                                 else
 197                                                 {
 198                                                         return ACR_DEFAULT;
 199                                                 }
 200                                         break;
 201                                         case AC_HALFOP:
 202                                                 if (CanOverride(source,"MODEHALFOP"))
 203                                                 {
 204                                                         if (NoisyOverride)
 205                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 206                                                                 OverHalfops++;
 207                                                         return ACR_ALLOW;
 208                                                 }
 209                                                 else
 210                                                 {
 211                                                         return ACR_DEFAULT;
 212                                                 }
 213                                         break;
 214                                         case AC_DEHALFOP:
 215                                                 if (CanOverride(source,"MODEDEHALFOP"))
 216                                                 {
 217                                                         if (NoisyOverride)
 218                                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 219                                                                 OverDehalfops++;
 220                                                         return ACR_ALLOW;
 221                                                 }
 222                                                 else
 223                                                 {
 224                                                         return ACR_DEFAULT;
 225                                                 }
 226                                         break;
 227                                 }
 228
 229                                 if (CanOverride(source,"OTHERMODE"))
 230                                 {
 231                                         if (NoisyOverride)
 232                                         if ((!channel->HasUser(source)) || (mode < STATUS_OP))
 233                                         {
 234                                                 OverriddenMode = true;
 235                                                 OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
 236                                         }
 237                                         return ACR_ALLOW;
 238                                 }
 239                                 else
 240                                 {
 241                                         return ACR_DEFAULT;
 242                                 }
 243                         }
 244                 }
 245
 246                 return ACR_DEFAULT;
 247         }
 248
 249         virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 250         {
 251                 if (IS_LOCAL(user) && IS_OPER(user))
 252                 {
 253                         if (chan)
 254                         {
 255                                 if ((chan->modes[CM_INVITEONLY]) && (CanOverride(user,"INVITE")))
 256                                 {
 257                                         irc::string x(chan->name.c_str());
 258                                         if (!user->IsInvited(x))
 259                                         {
 260                                                 if (RequireKey && keygiven != "override")
 261                                                 {
 262                                                         // Can't join normally -- must use a special key to bypass restrictions
 263                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 264                                                         return 1;
 265                                                 }
 266
 267                                                 if (NoisyOverride)
 268                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 269                                                 ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +i on "+std::string(cname));
 270                                         }
 271                                         return -1;
 272                                 }
 273
 274                                 if ((chan->modes[CM_KEY]) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 275                                 {
 276                                         if (RequireKey && keygiven != "override")
 277                                         {
 278                                                 // Can't join normally -- must use a special key to bypass restrictions
 279                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 280                                                 return 1;
 281                                         }
 282
 283                                         if (NoisyOverride)
 284                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 285                                         ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +k on "+std::string(cname));
 286                                         return -1;
 287                                 }
 288
 289                                 if ((chan->modes[CM_LIMIT]) && (chan->GetUserCounter() >=  atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 290                                 {
 291                                         if (RequireKey && keygiven != "override")
 292                                         {
 293                                                 // Can't join normally -- must use a special key to bypass restrictions
 294                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 295                                                 return 1;
 296                                         }
 297
 298                                         if (NoisyOverride)
 299                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 300                                         ServerInstance->SNO->WriteToSnoMask('O', user->nick+" used oper override to bypass +l on "+std::string(cname));
 301                                         return -1;
 302                                 }
 303
 304                                 if (CanOverride(user,"BANWALK"))
 305                                 {
 306                                         if (chan->IsBanned(user))
 307                                         {
 308                                                 if (RequireKey && keygiven != "override")
 309                                                 {
 310                                                         // Can't join normally -- must use a special key to bypass restrictions
 311                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 312                                                         return 1;
 313                                                 }
 314
 315                                                 if (NoisyOverride)
 316                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 317                                                 ServerInstance->SNO->WriteToSnoMask('O',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 318                                         }
 319                                         return -1;
 320                                 }
 321                         }
 322                 }
 323                 return 0;
 324         }
 325
 326         virtual ~ModuleOverride()
 327         {
 328                 ServerInstance->SNO->DisableSnomask('O');
 329         }
 330
 331         virtual Version GetVersion()
 332         {
 333                 return Version(1,2,0,1,VF_VENDOR,API_VERSION);
 334         }
 335 };
 336
 337 MODULE_INIT(ModuleOverride)