src/modules/m_denychans.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: Implements config tags which allow blocking of joins to channels */
  17
  18 class ModuleDenyChannels : public Module
  19 {
  20  public:
  21         ModuleDenyChannels()    {
  22                 Implementation eventlist[] = { I_OnUserPreJoin, I_OnRehash };
  23                 ServerInstance->Modules->Attach(eventlist, this, 2);
  24         }
  25
  26         virtual void OnRehash(User* user)
  27         {
  28                 ConfigReader Conf;
  29                 /* check for redirect validity and loops/chains */
  30                 for (int i =0; i < Conf.Enumerate("badchan"); i++)
  31                 {
  32                         std::string name = Conf.ReadValue("badchan","name",i);
  33                         std::string redirect = Conf.ReadValue("badchan","redirect",i);
  34
  35                         if (!redirect.empty())
  36                         {
  37
  38                                 if (!ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
  39                                 {
  40                                         if (user)
  41                                                 user->WriteServ("NOTICE %s :Invalid badchan redirect '%s'", user->nick.c_str(), redirect.c_str());
  42                                         throw ModuleException("Invalid badchan redirect, not a channel");
  43                                 }
  44
  45                                 for (int j =0; j < Conf.Enumerate("badchan"); j++)
  46                                 {
  47                                         if (InspIRCd::Match(redirect, Conf.ReadValue("badchan","name",j)))
  48                                         {
  49                                                 bool goodchan = false;
  50                                                 for (int k =0; k < Conf.Enumerate("goodchan"); k++)
  51                                                 {
  52                                                         if (InspIRCd::Match(redirect, Conf.ReadValue("goodchan","name",k)))
  53                                                                 goodchan = true;
  54                                                 }
  55
  56                                                 if (!goodchan)
  57                                                 {
  58                                                         /* <badchan:redirect> is a badchan */
  59                                                         if (user)
  60                                                                 user->WriteServ("NOTICE %s :Badchan %s redirects to badchan %s", user->nick.c_str(), name.c_str(), redirect.c_str());
  61                                                         throw ModuleException("Badchan redirect loop");
  62                                                 }
  63                                         }
  64                                 }
  65                         }
  66                 }
  67         }
  68
  69         virtual ~ModuleDenyChannels()
  70         {
  71         }
  72
  73         virtual Version GetVersion()
  74         {
  75                 return Version("Implements config tags which allow blocking of joins to channels", VF_VENDOR);
  76         }
  77
  78
  79         virtual ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
  80         {
  81                 ConfigReader Conf;
  82                 for (int j =0; j < Conf.Enumerate("badchan"); j++)
  83                 {
  84                         if (InspIRCd::Match(cname, Conf.ReadValue("badchan","name",j)))
  85                         {
  86                                 if (IS_OPER(user) && Conf.ReadFlag("badchan","allowopers",j))
  87                                 {
  88                                         return MOD_RES_PASSTHRU;
  89                                 }
  90                                 else
  91                                 {
  92                                         std::string reason = Conf.ReadValue("badchan","reason",j);
  93                                         std::string redirect = Conf.ReadValue("badchan","redirect",j);
  94
  95                                         for (int i = 0; i < Conf.Enumerate("goodchan"); i++)
  96                                         {
  97                                                 if (InspIRCd::Match(cname, Conf.ReadValue("goodchan", "name", i)))
  98                                                 {
  99                                                         return MOD_RES_PASSTHRU;
 100                                                 }
 101                                         }
 102
 103                                         if (ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
 104                                         {
 105                                                 /* simple way to avoid potential loops: don't redirect to +L channels */
 106                                                 Channel *newchan = ServerInstance->FindChan(redirect);
 107                                                 if ((!newchan) || (!(newchan->IsModeSet('L'))))
 108                                                 {
 109                                                         user->WriteNumeric(926, "%s %s :Channel %s is forbidden, redirecting to %s: %s",user->nick.c_str(),cname,cname,redirect.c_str(), reason.c_str());
 110                                                         Channel::JoinUser(user,redirect.c_str(),false,"",false,ServerInstance->Time());
 111                                                         return MOD_RES_DENY;
 112                                                 }
 113                                         }
 114
 115                                         user->WriteNumeric(926, "%s %s :Channel %s is forbidden: %s",user->nick.c_str(),cname,cname,reason.c_str());
 116                                         return MOD_RES_DENY;
 117                                 }
 118                         }
 119                 }
 120                 return MOD_RES_PASSTHRU;
 121         }
 122 };
 123
 124 MODULE_INIT(ModuleDenyChannels)