src/modules/m_nonicks.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/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
  16 /* $ModDesc: Provides support for channel mode +N & extban +b N: which prevents nick changes on channel */
  17
  18 class NoNicks : public ModeHandler
  19 {
  20  public:
  21         NoNicks(InspIRCd* Instance, Module* Creator) : ModeHandler(Creator, 'N', PARAM_NONE, MODETYPE_CHANNEL) { }
  22
  23         ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding)
  24         {
  25                 if (adding)
  26                 {
  27                         if (!channel->IsModeSet('N'))
  28                         {
  29                                 channel->SetMode('N',true);
  30                                 return MODEACTION_ALLOW;
  31                         }
  32                 }
  33                 else
  34                 {
  35                         if (channel->IsModeSet('N'))
  36                         {
  37                                 channel->SetMode('N',false);
  38                                 return MODEACTION_ALLOW;
  39                         }
  40                 }
  41
  42                 return MODEACTION_DENY;
  43         }
  44 };
  45
  46 class ModuleNoNickChange : public Module
  47 {
  48         NoNicks nn;
  49  public:
  50         ModuleNoNickChange(InspIRCd* Me) : Module(Me), nn(Me, this)
  51         {
  52                 ServerInstance->Modes->AddMode(&nn);
  53                 Implementation eventlist[] = { I_OnUserPreNick, I_On005Numeric };
  54                 ServerInstance->Modules->Attach(eventlist, this, 2);
  55         }
  56
  57         virtual ~ModuleNoNickChange()
  58         {
  59                 ServerInstance->Modes->DelMode(&nn);
  60         }
  61
  62         virtual Version GetVersion()
  63         {
  64                 return Version("Provides support for channel mode +N & extban +b N: which prevents nick changes on channel", VF_COMMON | VF_VENDOR, API_VERSION);
  65         }
  66
  67
  68         virtual void On005Numeric(std::string &output)
  69         {
  70                 ServerInstance->AddExtBanChar('N');
  71         }
  72
  73         virtual ModResult OnUserPreNick(User* user, const std::string &newnick)
  74         {
  75                 if (!IS_LOCAL(user))
  76                         return MOD_RES_PASSTHRU;
  77
  78                 if (isdigit(newnick[0])) /* don't even think about touching a switch to uid! */
  79                         return MOD_RES_PASSTHRU;
  80
  81                 // Allow forced nick changes.
  82                 if (User::NICKForced.get(user))
  83                         return MOD_RES_PASSTHRU;
  84
  85                 for (UCListIter i = user->chans.begin(); i != user->chans.end(); i++)
  86                 {
  87                         Channel* curr = *i;
  88
  89                         if (CHANOPS_EXEMPT(ServerInstance, 'N') && curr->GetPrefixValue(user) == OP_VALUE)
  90                                 continue;
  91
  92                         if (!curr->GetExtBanStatus(user, 'N').check(!curr->IsModeSet('N')))
  93                         {
  94                                 user->WriteNumeric(ERR_CANTCHANGENICK, "%s :Can't change nickname while on %s (+N is set)",
  95                                         user->nick.c_str(), curr->name.c_str());
  96                                 return MOD_RES_DENY;
  97                         }
  98                 }
  99
 100                 return MOD_RES_PASSTHRU;
 101         }
 102 };
 103
 104 MODULE_INIT(ModuleNoNickChange)