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 "inspircd.h"
  15 #include "users.h"
  16 #include "channels.h"
  17 #include "modules.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                         /* Fix for bug #379 reported by stealth. On +/-Q make m_watch think the user has signed on/off */
  87                         Module* m = ServerInstance->FindModule("m_watch.so");
  88
  89                         /* This must come before setting/unsetting the handler */
  90                         if (m && adding)
  91                                 m->OnUserQuit(dest, "Connection closed", "Connection closed");
  92
  93                         /* Set visibility handler object */
  94                         dest->Visibility = adding ? qo : NULL;
  95
  96                         /* This has to come after setting/unsetting the handler */
  97                         if (m && !adding)
  98                                 m->OnPostConnect(dest);
  99
 100                         /* User appears to vanish or appear from nowhere */
 101                         for (UCListIter f = dest->chans.begin(); f != dest->chans.end(); f++)
 102                         {
 103                                 CUList *ulist = f->first->GetUsers();
 104                                 char tb[MAXBUF];
 105
 106                                 snprintf(tb,MAXBUF,":%s %s %s", dest->GetFullHost(), adding ? "PART" : "JOIN", f->first->name);
 107                                 std::string out = tb;
 108                                 std::string n = this->ServerInstance->Modes->ModeString(dest, f->first);
 109
 110                                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 111                                 {
 112                                         /* User only appears to vanish for non-opers */
 113                                         if (IS_LOCAL(i->first) && !IS_OPER(i->first))
 114                                         {
 115                                                 i->first->Write(out);
 116                                                 if (!n.empty() && !adding)
 117                                                         i->first->WriteServ("MODE %s +%s", f->first->name, n.c_str());
 118                                         }
 119                                 }
 120
 121                                 ServerInstance->WriteOpers("*** \2NOTICE\2: Oper %s has become %svisible (%sQ)", dest->GetFullHost(), adding ? "in" : "", adding ? "+" : "-");
 122                         }
 123                         return MODEACTION_ALLOW;
 124                 }
 125                 else
 126                 {
 127                         return MODEACTION_DENY;
 128                 }
 129         }
 130 };
 131
 132 class InvisibleDeOper : public ModeWatcher
 133 {
 134  private:
 135         InspIRCd* Srv;
 136  public:
 137         InvisibleDeOper(InspIRCd* Instance) : ModeWatcher(Instance, 'o', MODETYPE_USER), Srv(Instance)
 138         {
 139         }
 140
 141         bool BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &param, bool adding, ModeType type)
 142         {
 143                 /* Users who are opers and have +Q get their +Q removed when they deoper */
 144                 if ((!adding) && (dest->IsModeSet('Q')))
 145                 {
 146                         const char* newmodes[] = { dest->nick, "-Q" };
 147                         ServerInstance->Modes->Process(newmodes, 2, source, true);
 148                 }
 149                 return true;
 150         }
 151 };
 152
 153
 154 class ModuleInvisible : public Module
 155 {
 156  private:
 157         InvisibleMode* qm;
 158         InvisibleDeOper* ido;
 159  public:
 160         ModuleInvisible(InspIRCd* Me)
 161                 : Module(Me)
 162         {
 163                 conf = new ConfigReader(ServerInstance);
 164                 qm = new InvisibleMode(ServerInstance);
 165                 if (!ServerInstance->AddMode(qm, 'Q'))
 166                         throw ModuleException("Could not add new modes!");
 167                 ido = new InvisibleDeOper(ServerInstance);
 168                 if (!ServerInstance->AddModeWatcher(ido))
 169                         throw ModuleException("Could not add new mode watcher on usermode +o!");
 170         }
 171
 172         virtual ~ModuleInvisible()
 173         {
 174                 ServerInstance->Modes->DelMode(qm);
 175                 ServerInstance->Modes->DelModeWatcher(ido);
 176                 DELETE(qm);
 177                 DELETE(ido);
 178                 DELETE(conf);
 179         }
 180
 181         virtual Version GetVersion()
 182         {
 183                 return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION);
 184         }
 185
 186         void Implements(char* List)
 187         {
 188                 List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnUserJoin] = List[I_OnUserPart] = List[I_OnUserQuit] = List[I_OnRehash] = 1;
 189         }
 190
 191         virtual void OnUserJoin(userrec* user, chanrec* channel, bool &silent)
 192         {
 193                 if (user->IsModeSet('Q'))
 194                 {
 195                         silent = true;
 196                         /* Because we silenced the event, make sure it reaches the user whos joining (but only them of course) */
 197                         this->WriteCommonFrom(user, channel, "JOIN %s", channel->name);
 198                         ServerInstance->WriteOpers("*** \2NOTICE\2: Oper %s has joined %s invisibly (+Q)", user->GetFullHost(), channel->name);
 199                 }
 200         }
 201
 202         virtual void OnRehash(userrec* user, const std::string &parameter)
 203         {
 204                 DELETE(conf);
 205                 conf = new ConfigReader(ServerInstance);
 206         }
 207
 208         void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage, bool &silent)
 209         {
 210                 if (user->IsModeSet('Q'))
 211                 {
 212                         silent = true;
 213                         /* Because we silenced the event, make sure it reaches the user whos leaving (but only them of course) */
 214                         this->WriteCommonFrom(user, channel, "PART %s%s%s", channel->name,
 215                                         partmessage.empty() ? "" : " :",
 216                                         partmessage.empty() ? "" : partmessage.c_str());
 217                 }
 218         }
 219
 220         void OnUserQuit(userrec* user, const std::string &reason, const std::string &oper_message)
 221         {
 222                 if (user->IsModeSet('Q'))
 223                 {
 224                         command_t* parthandler = ServerInstance->Parser->GetHandler("PART");
 225                         std::vector<std::string> to_leave;
 226                         const char* parameters[2];
 227                         if (parthandler)
 228                         {
 229                                 for (UCListIter f = user->chans.begin(); f != user->chans.end(); f++)
 230                                                 to_leave.push_back(f->first->name);
 231                                 /* We cant do this neatly in one loop, as we are modifying the map we are iterating */
 232                                 for (std::vector<std::string>::iterator n = to_leave.begin(); n != to_leave.end(); n++)
 233                                 {
 234                                         parameters[0] = n->c_str();
 235                                         /* This triggers our OnUserPart, above, making the PART silent */
 236                                         parthandler->Handle(parameters, 1, user);
 237                                 }
 238                         }
 239                 }
 240         }
 241
 242         /* No privmsg response when hiding - submitted by Eric at neowin */
 243         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 244         {
 245                 if ((target_type == TYPE_USER) && (IS_LOCAL(user)))
 246                 {
 247                         userrec* target = (userrec*)dest;
 248                         if(target->IsModeSet('Q') && !*user->oper)
 249                         {
 250                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, target->nick);
 251                                 return 1;
 252                         }
 253                 }
 254                 return 0;
 255         }
 256
 257         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 258         {
 259                 return OnUserPreNotice(user, dest, target_type, text, status, exempt_list);
 260         }
 261
 262         /* Fix by Eric @ neowin.net, thanks :) -- Brain */
 263         void WriteCommonFrom(userrec *user, chanrec* channel, const char* text, ...)
 264         {
 265                 va_list argsPtr;
 266                 char textbuffer[MAXBUF];
 267                 char tb[MAXBUF];
 268
 269                 va_start(argsPtr, text);
 270                 vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 271                 va_end(argsPtr);
 272                 snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),textbuffer);
 273
 274                 CUList *ulist = channel->GetUsers();
 275
 276                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 277                 {
 278                         /* User only appears to vanish for non-opers */
 279                         if (IS_LOCAL(i->first) && IS_OPER(i->first))
 280                         {
 281                                 i->first->Write(std::string(tb));
 282                         }
 283                 }
 284         }
 285
 286 };
 287
 288 MODULE_INIT(ModuleInvisible)