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 <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         void Implements(char* List)
 189         {
 190                 List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnUserJoin] = List[I_OnUserPart] = List[I_OnUserQuit] = List[I_OnRehash] = 1;
 191         }
 192
 193         virtual void OnUserJoin(User* user, Channel* channel, bool &silent)
 194         {
 195                 if (user->IsModeSet('Q'))
 196                 {
 197                         silent = true;
 198                         /* Because we silenced the event, make sure it reaches the user whos joining (but only them of course) */
 199                         this->WriteCommonFrom(user, channel, "JOIN %s", channel->name);
 200                         ServerInstance->WriteOpers("*** \2NOTICE\2: Oper %s has joined %s invisibly (+Q)", user->GetFullHost(), channel->name);
 201                 }
 202         }
 203
 204         virtual void OnRehash(User* user, const std::string &parameter)
 205         {
 206                 DELETE(conf);
 207                 conf = new ConfigReader(ServerInstance);
 208         }
 209
 210         void OnUserPart(User* user, Channel* channel, const std::string &partmessage, bool &silent)
 211         {
 212                 if (user->IsModeSet('Q'))
 213                 {
 214                         silent = true;
 215                         /* Because we silenced the event, make sure it reaches the user whos leaving (but only them of course) */
 216                         this->WriteCommonFrom(user, channel, "PART %s%s%s", channel->name,
 217                                         partmessage.empty() ? "" : " :",
 218                                         partmessage.empty() ? "" : partmessage.c_str());
 219                 }
 220         }
 221
 222         void OnUserQuit(User* user, const std::string &reason, const std::string &oper_message)
 223         {
 224                 if (user->IsModeSet('Q'))
 225                 {
 226                         Command* parthandler = ServerInstance->Parser->GetHandler("PART");
 227                         std::vector<std::string> to_leave;
 228                         const char* parameters[2];
 229                         if (parthandler)
 230                         {
 231                                 for (UCListIter f = user->chans.begin(); f != user->chans.end(); f++)
 232                                                 to_leave.push_back(f->first->name);
 233                                 /* We cant do this neatly in one loop, as we are modifying the map we are iterating */
 234                                 for (std::vector<std::string>::iterator n = to_leave.begin(); n != to_leave.end(); n++)
 235                                 {
 236                                         parameters[0] = n->c_str();
 237                                         /* This triggers our OnUserPart, above, making the PART silent */
 238                                         parthandler->Handle(parameters, 1, user);
 239                                 }
 240                         }
 241                 }
 242         }
 243
 244         /* No privmsg response when hiding - submitted by Eric at neowin */
 245         virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 246         {
 247                 if ((target_type == TYPE_USER) && (IS_LOCAL(user)))
 248                 {
 249                         User* target = (User*)dest;
 250                         if(target->IsModeSet('Q') && !*user->oper)
 251                         {
 252                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, target->nick);
 253                                 return 1;
 254                         }
 255                 }
 256                 return 0;
 257         }
 258
 259         virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 260         {
 261                 return OnUserPreNotice(user, dest, target_type, text, status, exempt_list);
 262         }
 263
 264         /* Fix by Eric @ neowin.net, thanks :) -- Brain */
 265         void WriteCommonFrom(User *user, Channel* channel, const char* text, ...)
 266         {
 267                 va_list argsPtr;
 268                 char textbuffer[MAXBUF];
 269                 char tb[MAXBUF];
 270
 271                 va_start(argsPtr, text);
 272                 vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 273                 va_end(argsPtr);
 274                 snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),textbuffer);
 275
 276                 CUList *ulist = channel->GetUsers();
 277
 278                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 279                 {
 280                         /* User only appears to vanish for non-opers */
 281                         if (IS_LOCAL(i->first) && IS_OPER(i->first))
 282                         {
 283                                 i->first->Write(std::string(tb));
 284                         }
 285                 }
 286         }
 287
 288 };
 289
 290 MODULE_INIT(ModuleInvisible)