src/modules/m_invisible.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 <stdarg.h>
  16
  17 /* $ModDesc: Allows for opered clients to join channels without being seen, similar to unreal 3.1 +I mode */
  18
  19 static ConfigReader* conf;
  20
  21 class QuietOper : public VisData
  22 {
  23  public:
  24         QuietOper()
  25         {
  26         }
  27
  28         virtual ~QuietOper()
  29         {
  30         }
  31
  32         virtual bool VisibleTo(User* user)
  33         {
  34                 return IS_OPER(user);
  35         }
  36 };
  37
  38
  39 class InvisibleMode : public ModeHandler
  40 {
  41         QuietOper* qo;
  42  public:
  43         InvisibleMode(InspIRCd* Instance) : ModeHandler(Instance, 'Q', 0, 0, false, MODETYPE_USER, true)
  44         {
  45                 qo = new QuietOper();
  46         }
  47
  48         ~InvisibleMode()
  49         {
  50                 for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
  51                         if (i->second->Visibility == qo)
  52                                 i->second->Visibility = NULL;
  53                 delete qo;
  54         }
  55
  56         ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding)
  57         {
  58                 if (source != dest)
  59                         return MODEACTION_DENY;
  60
  61                 if (dest->IsModeSet('Q') != adding)
  62                 {
  63                         bool ok = false;
  64
  65                         for (int j = 0; j < conf->Enumerate("type"); j++)
  66                         {
  67                                 std::string opertype = conf->ReadValue("type","name",j);
  68                                 if (opertype == source->oper)
  69                                 {
  70                                         ok = conf->ReadFlag("type", "canquiet", j);
  71                                         break;
  72                                 }
  73                         }
  74
  75                         if (!ok)
  76                         {
  77                                 source->WriteServ("481 %s :Permission Denied - You do not have access to become invisible via user mode +Q", source->nick);
  78                                 return MODEACTION_DENY;
  79                         }
  80
  81                         dest->SetMode('Q', adding);
  82
  83                         /* Fix for bug #379 reported by stealth. On +/-Q make m_watch think the user has signed on/off */
  84                         Module* m = ServerInstance->Modules->Find("m_watch.so");
  85
  86                         /* This must come before setting/unsetting the handler */
  87                         if (m && adding)
  88                                 m->OnUserQuit(dest, "Connection closed", "Connection closed");
  89
  90                         /* Set visibility handler object */
  91                         dest->Visibility = adding ? qo : NULL;
  92
  93                         /* This has to come after setting/unsetting the handler */
  94                         if (m && !adding)
  95                                 m->OnPostConnect(dest);
  96
  97                         /* User appears to vanish or appear from nowhere */
  98                         for (UCListIter f = dest->chans.begin(); f != dest->chans.end(); f++)
  99                         {
 100                                 CUList *ulist = f->first->GetUsers();
 101                                 char tb[MAXBUF];
 102
 103                                 snprintf(tb,MAXBUF,":%s %s %s", dest->GetFullHost(), adding ? "PART" : "JOIN", f->first->name);
 104                                 std::string out = tb;
 105                                 std::string n = this->ServerInstance->Modes->ModeString(dest, f->first);
 106
 107                                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 108                                 {
 109                                         /* User only appears to vanish for non-opers */
 110                                         if (IS_LOCAL(i->first) && !IS_OPER(i->first))
 111                                         {
 112                                                 i->first->Write(out);
 113                                                 if (!n.empty() && !adding)
 114                                                         i->first->WriteServ("MODE %s +%s", f->first->name, n.c_str());
 115                                         }
 116                                 }
 117
 118                                 ServerInstance->WriteOpers("*** \2NOTICE\2: Oper %s has become %svisible (%sQ)", dest->GetFullHost(), adding ? "in" : "", adding ? "+" : "-");
 119                         }
 120                         return MODEACTION_ALLOW;
 121                 }
 122                 else
 123                 {
 124                         return MODEACTION_DENY;
 125                 }
 126         }
 127 };
 128
 129 class InvisibleDeOper : public ModeWatcher
 130 {
 131  private:
 132         InspIRCd* Srv;
 133  public:
 134         InvisibleDeOper(InspIRCd* Instance) : ModeWatcher(Instance, 'o', MODETYPE_USER), Srv(Instance)
 135         {
 136         }
 137
 138         bool BeforeMode(User* source, User* dest, Channel* channel, std::string &param, bool adding, ModeType type)
 139         {
 140                 /* Users who are opers and have +Q get their +Q removed when they deoper */
 141                 if ((!adding) && (dest->IsModeSet('Q')))
 142                 {
 143                         const char* newmodes[] = { dest->nick, "-Q" };
 144                         ServerInstance->Modes->Process(newmodes, 2, source, true);
 145                 }
 146                 return true;
 147         }
 148 };
 149
 150
 151 class ModuleInvisible : public Module
 152 {
 153  private:
 154         InvisibleMode* qm;
 155         InvisibleDeOper* ido;
 156  public:
 157         ModuleInvisible(InspIRCd* Me)
 158                 : Module(Me)
 159         {
 160                 conf = new ConfigReader(ServerInstance);
 161                 qm = new InvisibleMode(ServerInstance);
 162                 if (!ServerInstance->AddMode(qm))
 163                         throw ModuleException("Could not add new modes!");
 164                 ido = new InvisibleDeOper(ServerInstance);
 165                 if (!ServerInstance->AddModeWatcher(ido))
 166                         throw ModuleException("Could not add new mode watcher on usermode +o!");
 167
 168                 /* Yeah i know people can take this out. I'm not about to obfuscate code just to be a pain in the ass. */
 169                 ServerInstance->ServerNoticeAll("*** m_invisible.so has just been loaded on this network. For more information, please visit http://inspircd.org/wiki/Modules/invisible");
 170                 Implementation eventlist[] = { I_OnUserPreMessage, I_OnUserPreNotice, I_OnUserJoin, I_OnUserPart, I_OnUserQuit, I_OnRehash };
 171                 ServerInstance->Modules->Attach(eventlist, this, 6);
 172         }
 173
 174         virtual ~ModuleInvisible()
 175         {
 176                 ServerInstance->Modes->DelMode(qm);
 177                 ServerInstance->Modes->DelModeWatcher(ido);
 178                 delete qm;
 179                 delete ido;
 180                 delete conf;
 181         }
 182
 183         virtual Version GetVersion()
 184         {
 185                 return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION);
 186         }
 187
 188
 189         virtual void OnUserJoin(User* user, Channel* channel, bool sync, bool &silent)
 190         {
 191                 if (user->IsModeSet('Q'))
 192                 {
 193                         silent = true;
 194                         /* Because we silenced the event, make sure it reaches the user whos joining (but only them of course) */
 195                         this->WriteCommonFrom(user, channel, "JOIN %s", channel->name);
 196                         ServerInstance->WriteOpers("*** \2NOTICE\2: Oper %s has joined %s invisibly (+Q)", user->GetFullHost(), channel->name);
 197                 }
 198         }
 199
 200         virtual void OnRehash(User* user, const std::string &parameter)
 201         {
 202                 delete conf;
 203                 conf = new ConfigReader(ServerInstance);
 204         }
 205
 206         void OnUserPart(User* user, Channel* channel, const std::string &partmessage, bool &silent)
 207         {
 208                 if (user->IsModeSet('Q'))
 209                 {
 210                         silent = true;
 211                         /* Because we silenced the event, make sure it reaches the user whos leaving (but only them of course) */
 212                         this->WriteCommonFrom(user, channel, "PART %s%s%s", channel->name,
 213                                         partmessage.empty() ? "" : " :",
 214                                         partmessage.empty() ? "" : partmessage.c_str());
 215                 }
 216         }
 217
 218         void OnUserQuit(User* user, const std::string &reason, const std::string &oper_message)
 219         {
 220                 if (user->IsModeSet('Q'))
 221                 {
 222                         Command* parthandler = ServerInstance->Parser->GetHandler("PART");
 223                         std::vector<std::string> to_leave;
 224                         const char* parameters[2];
 225                         if (parthandler)
 226                         {
 227                                 for (UCListIter f = user->chans.begin(); f != user->chans.end(); f++)
 228                                                 to_leave.push_back(f->first->name);
 229                                 /* We cant do this neatly in one loop, as we are modifying the map we are iterating */
 230                                 for (std::vector<std::string>::iterator n = to_leave.begin(); n != to_leave.end(); n++)
 231                                 {
 232                                         parameters[0] = n->c_str();
 233                                         /* This triggers our OnUserPart, above, making the PART silent */
 234                                         parthandler->Handle(parameters, 1, user);
 235                                 }
 236                         }
 237                 }
 238         }
 239
 240         /* No privmsg response when hiding - submitted by Eric at neowin */
 241         virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 242         {
 243                 if ((target_type == TYPE_USER) && (IS_LOCAL(user)))
 244                 {
 245                         User* target = (User*)dest;
 246                         if(target->IsModeSet('Q') && !*user->oper)
 247                         {
 248                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, target->nick);
 249                                 return 1;
 250                         }
 251                 }
 252                 return 0;
 253         }
 254
 255         virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 256         {
 257                 return OnUserPreNotice(user, dest, target_type, text, status, exempt_list);
 258         }
 259
 260         /* Fix by Eric @ neowin.net, thanks :) -- Brain */
 261         void WriteCommonFrom(User *user, Channel* channel, const char* text, ...)
 262         {
 263                 va_list argsPtr;
 264                 char textbuffer[MAXBUF];
 265                 char tb[MAXBUF];
 266
 267                 va_start(argsPtr, text);
 268                 vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 269                 va_end(argsPtr);
 270                 snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),textbuffer);
 271
 272                 CUList *ulist = channel->GetUsers();
 273
 274                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 275                 {
 276                         /* User only appears to vanish for non-opers */
 277                         if (IS_LOCAL(i->first) && IS_OPER(i->first))
 278                         {
 279                                 i->first->Write(std::string(tb));
 280                         }
 281                 }
 282         }
 283
 284 };
 285
 286 MODULE_INIT(ModuleInvisible)