src/modules/m_denychans.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 "wildcard.h"
  16
  17 /* $ModDesc: Implements config tags which allow blocking of joins to channels */
  18
  19 class ModuleDenyChannels : public Module
  20 {
  21  private:
  22
  23
  24         ConfigReader *Conf;
  25
  26  public:
  27         ModuleDenyChannels(InspIRCd* Me) : Module(Me)
  28         {
  29
  30                 Conf = new ConfigReader(ServerInstance);
  31                 Implementation eventlist[] = { I_OnUserPreJoin, I_OnRehash };
  32                 ServerInstance->Modules->Attach(eventlist, this, 2);
  33         }
  34
  35         virtual void OnRehash(User* user, const std::string &param)
  36         {
  37                 delete Conf;
  38                 Conf = new ConfigReader(ServerInstance);
  39                 /* check for redirect validity and loops/chains */
  40                 for (int i =0; i < Conf->Enumerate("badchan"); i++)
  41                 {
  42                         std::string name = Conf->ReadValue("badchan","name",i);
  43                         std::string redirect = Conf->ReadValue("badchan","redirect",i);
  44
  45                         if (!redirect.empty())
  46                         {
  47
  48                                 if (!ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
  49                                 {
  50                                         if (user)
  51                                                 user->WriteServ("Notice %s :Invalid badchan redirect '%s'", user->nick.c_str(), redirect.c_str());
  52                                         throw ModuleException("Invalid badchan redirect, not a channel");
  53                                 }
  54
  55                                 for (int j =0; j < Conf->Enumerate("badchan"); j++)
  56                                 {
  57                                         if (match(redirect, Conf->ReadValue("badchan","name",j)))
  58                                         {
  59                                                 bool goodchan = false;
  60                                                 for (int k =0; k < Conf->Enumerate("goodchan"); k++)
  61                                                 {
  62                                                         if (match(redirect, Conf->ReadValue("goodchan","name",k)))
  63                                                                 goodchan = true;
  64                                                 }
  65
  66                                                 if (!goodchan)
  67                                                 {
  68                                                         /* <badchan:redirect> is a badchan */
  69                                                         if (user)
  70                                                                 user->WriteServ("NOTICE %s :Badchan %s redirects to badchan %s", user->nick.c_str(), name.c_str(), redirect.c_str());
  71                                                         throw ModuleException("Badchan redirect loop");
  72                                                 }
  73                                         }
  74                                 }
  75                         }
  76                 }
  77         }
  78
  79         virtual ~ModuleDenyChannels()
  80         {
  81                 delete Conf;
  82         }
  83
  84         virtual Version GetVersion()
  85         {
  86                 return Version(1,2,0,1,VF_VENDOR,API_VERSION);
  87         }
  88
  89
  90         virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
  91         {
  92                 for (int j =0; j < Conf->Enumerate("badchan"); j++)
  93                 {
  94                         if (match(cname, Conf->ReadValue("badchan","name",j)))
  95                         {
  96                                 if (IS_OPER(user) && Conf->ReadFlag("badchan","allowopers",j))
  97                                 {
  98                                         return 0;
  99                                 }
 100                                 else
 101                                 {
 102                                         std::string reason = Conf->ReadValue("badchan","reason",j);
 103                                         std::string redirect = Conf->ReadValue("badchan","redirect",j);
 104
 105                                         for (int i = 0; i < Conf->Enumerate("goodchan"); i++)
 106                                         {
 107                                                 if (match(cname, Conf->ReadValue("goodchan", "name", i)))
 108                                                 {
 109                                                         return 0;
 110                                                 }
 111                                         }
 112
 113                                         if (ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
 114                                         {
 115                                                 /* simple way to avoid potential loops: don't redirect to +L channels */
 116                                                 Channel *newchan = ServerInstance->FindChan(redirect);
 117                                                 if ((!newchan) || (!(newchan->IsModeSet('L'))))
 118                                                 {
 119                                                         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());
 120                                                         Channel::JoinUser(ServerInstance,user,redirect.c_str(),false,"",false,ServerInstance->Time());
 121                                                         return 1;
 122                                                 }
 123                                         }
 124
 125                                         user->WriteNumeric(926, "%s %s :Channel %s is forbidden: %s",user->nick.c_str(),cname,cname,reason.c_str());
 126                                         return 1;
 127                                 }
 128                         }
 129                 }
 130                 return 0;
 131         }
 132 };
 133
 134 MODULE_INIT(ModuleDenyChannels)