src/modules/m_invisible.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 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 "users.h"
  15 #include "channels.h"
  16 #include "modules.h"
  17 #include "inspircd.h"
  18 #include "stdarg.h"
  19
  20 /* $ModDesc: Allows for opered clients to join channels without being seen, similar to unreal 3.1 +I mode */
  21
  22 static ConfigReader* conf;
  23
  24 class QuietOper : public VisData
  25 {
  26  public:
  27         QuietOper()
  28         {
  29         }
  30
  31         virtual ~QuietOper()
  32         {
  33         }
  34
  35         virtual bool VisibleTo(userrec* user)
  36         {
  37                 return IS_OPER(user);
  38         }
  39 };
  40
  41
  42 class InvisibleMode : public ModeHandler
  43 {
  44         QuietOper* qo;
  45  public:
  46         InvisibleMode(InspIRCd* Instance) : ModeHandler(Instance, 'Q', 0, 0, false, MODETYPE_USER, true)
  47         {
  48                 qo = new QuietOper();
  49         }
  50
  51         ~InvisibleMode()
  52         {
  53                 for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
  54                         if (i->second->Visibility == qo)
  55                                 i->second->Visibility = NULL;
  56                 delete qo;
  57         }
  58
  59         ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
  60         {
  61                 if (source != dest)
  62                         return MODEACTION_DENY;
  63
  64                 if (dest->IsModeSet('Q') != adding)
  65                 {
  66                         bool ok = false;
  67
  68                         for (int j = 0; j < conf->Enumerate("type"); j++)
  69                         {
  70                                 std::string opertype = conf->ReadValue("type","name",j);
  71                                 if (opertype == source->oper)
  72                                 {
  73                                         ok = conf->ReadFlag("type", "canquiet", j);
  74                                         break;
  75                                 }
  76                         }
  77
  78                         if (!ok)
  79                         {
  80                                 source->WriteServ("481 %s :Permission Denied - You do not have access to become invisible via user mode +Q", source->nick);
  81                                 return MODEACTION_DENY;
  82                         }
  83
  84                         dest->SetMode('Q', adding);
  85
  86                         /* Set visibility handler object */
  87                         dest->Visibility = adding ? qo : NULL;
  88
  89                         /* User appears to vanish or appear from nowhere */
  90                         for (UCListIter f = dest->chans.begin(); f != dest->chans.end(); f++)
  91                         {
  92                                 CUList *ulist = f->first->GetUsers();
  93                                 char tb[MAXBUF];
  94
  95                                 snprintf(tb,MAXBUF,":%s %s %s", dest->GetFullHost(), adding ? "PART" : "JOIN", f->first->name);
  96                                 std::string out = tb;
  97                                 std::string n = this->ServerInstance->Modes->ModeString(dest, f->first);
  98
  99                                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 100                                 {
 101                                         /* User only appears to vanish for non-opers */
 102                                         if (IS_LOCAL(i->first) && !IS_OPER(i->first))
 103                                         {
 104                                                 i->first->Write(out);
 105                                                 if (!n.empty() && !adding)
 106                                                         i->first->WriteServ("MODE %s +%s", f->first->name, n.c_str());
 107                                         }
 108                                 }
 109
 110                                 ServerInstance->WriteOpers("*** \2NOTICE\2: Oper %s has become %svisible (%sQ)", dest->GetFullHost(), adding ? "in" : "", adding ? "+" : "-");
 111                         }
 112                         return MODEACTION_ALLOW;
 113                 }
 114                 else
 115                 {
 116                         return MODEACTION_DENY;
 117                 }
 118         }
 119 };
 120
 121 class InvisibleDeOper : public ModeWatcher
 122 {
 123  private:
 124         InspIRCd* Srv;
 125  public:
 126         InvisibleDeOper(InspIRCd* Instance) : ModeWatcher(Instance, 'o', MODETYPE_USER), Srv(Instance)
 127         {
 128         }
 129
 130         bool BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &param, bool adding, ModeType type)
 131         {
 132                 /* Users who are opers and have +Q get their +Q removed when they deoper */
 133                 if ((!adding) && (dest->IsModeSet('Q')))
 134                 {
 135                         const char* newmodes[] = { dest->nick, "-Q" };
 136                         ServerInstance->Modes->Process(newmodes, 2, source, true);
 137                 }
 138                 return true;
 139         }
 140 };
 141
 142
 143 class ModuleInvisible : public Module
 144 {
 145  private:
 146         InvisibleMode* qm;
 147         InvisibleDeOper* ido;
 148  public:
 149         ModuleInvisible(InspIRCd* Me)
 150                 : Module(Me)
 151         {
 152                 conf = new ConfigReader(ServerInstance);
 153                 qm = new InvisibleMode(ServerInstance);
 154                 if (!ServerInstance->AddMode(qm, 'Q'))
 155                         throw ModuleException("Could not add new modes!");
 156                 ido = new InvisibleDeOper(ServerInstance);
 157                 if (!ServerInstance->AddModeWatcher(ido))
 158                         throw ModuleException("Could not add new mode watcher on usermode +o!");
 159         }
 160
 161         virtual ~ModuleInvisible()
 162         {
 163                 ServerInstance->Modes->DelMode(qm);
 164                 ServerInstance->Modes->DelModeWatcher(ido);
 165                 DELETE(qm);
 166                 DELETE(ido);
 167                 DELETE(conf);
 168         }
 169
 170         virtual Version GetVersion()
 171         {
 172                 return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION);
 173         }
 174
 175         void Implements(char* List)
 176         {
 177                 List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnUserJoin] = List[I_OnUserPart] = List[I_OnUserQuit] = List[I_OnRehash] = 1;
 178         }
 179
 180         virtual void OnUserJoin(userrec* user, chanrec* channel, bool &silent)
 181         {
 182                 if (user->IsModeSet('Q'))
 183                 {
 184                         silent = true;
 185                         /* Because we silenced the event, make sure it reaches the user whos joining (but only them of course) */
 186                         this->WriteCommonFrom(user, channel, "JOIN %s", channel->name);
 187                         ServerInstance->WriteOpers("*** \2NOTICE\2: Oper %s has joined %s invisibly (+Q)", user->GetFullHost(), channel->name);
 188                 }
 189         }
 190
 191         virtual void OnRehash(userrec* user, const std::string &parameter)
 192         {
 193                 DELETE(conf);
 194                 conf = new ConfigReader(ServerInstance);
 195         }
 196
 197         void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage, bool &silent)
 198         {
 199                 if (user->IsModeSet('Q'))
 200                 {
 201                         silent = true;
 202                         /* Because we silenced the event, make sure it reaches the user whos leaving (but only them of course) */
 203                         this->WriteCommonFrom(user, channel, "PART %s%s%s", channel->name,
 204                                         partmessage.empty() ? "" : " :",
 205                                         partmessage.empty() ? "" : partmessage.c_str());
 206                 }
 207         }
 208
 209         void OnUserQuit(userrec* user, const std::string &reason, const std::string &oper_message)
 210         {
 211                 if (user->IsModeSet('Q'))
 212                 {
 213                         command_t* parthandler = ServerInstance->Parser->GetHandler("PART");
 214                         std::vector<std::string> to_leave;
 215                         const char* parameters[2];
 216                         if (parthandler)
 217                         {
 218                                 for (UCListIter f = user->chans.begin(); f != user->chans.end(); f++)
 219                                                 to_leave.push_back(f->first->name);
 220                                 /* We cant do this neatly in one loop, as we are modifying the map we are iterating */
 221                                 for (std::vector<std::string>::iterator n = to_leave.begin(); n != to_leave.end(); n++)
 222                                 {
 223                                         parameters[0] = n->c_str();
 224                                         /* This triggers our OnUserPart, above, making the PART silent */
 225                                         parthandler->Handle(parameters, 1, user);
 226                                 }
 227                         }
 228                 }
 229         }
 230
 231         /* No privmsg response when hiding - submitted by Eric at neowin */
 232         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 233         {
 234                 if ((target_type == TYPE_USER) && (IS_LOCAL(user)))
 235                 {
 236                         userrec* target = (userrec*)dest;
 237                         if(target->IsModeSet('Q') && !*user->oper)
 238                         {
 239                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, target->nick);
 240                                 return 1;
 241                         }
 242                 }
 243                 return 0;
 244         }
 245
 246         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 247         {
 248                 return OnUserPreNotice(user, dest, target_type, text, status, exempt_list);
 249         }
 250
 251         /* Fix by Eric @ neowin.net, thanks :) -- Brain */
 252         void WriteCommonFrom(userrec *user, chanrec* channel, const char* text, ...)
 253         {
 254                 va_list argsPtr;
 255                 char textbuffer[MAXBUF];
 256                 char tb[MAXBUF];
 257
 258                 va_start(argsPtr, text);
 259                 vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 260                 va_end(argsPtr);
 261                 snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),textbuffer);
 262
 263                 CUList *ulist = channel->GetUsers();
 264
 265                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 266                 {
 267                         /* User only appears to vanish for non-opers */
 268                         if (IS_LOCAL(i->first) && IS_OPER(i->first))
 269                         {
 270                                 i->first->Write(std::string(tb));
 271                         }
 272                 }
 273         }
 274
 275 };
 276
 277 class ModuleInvisibleFactory : public ModuleFactory
 278 {
 279  public:
 280         ModuleInvisibleFactory()
 281         {
 282         }
 283
 284         ~ModuleInvisibleFactory()
 285         {
 286         }
 287
 288         virtual Module * CreateModule(InspIRCd* Me)
 289         {
 290                 return new ModuleInvisible(Me);
 291         }
 292
 293 };
 294
 295 extern "C" DllExport void * init_module( void )
 296 {
 297         return new ModuleInvisibleFactory;
 298 }
 299