src/modules/m_blockcaps.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
  16 /* $ModDesc: Provides support for channel mode +P to block all-CAPS channel messages and notices */
  17
  18
  19 /** Handles the +P channel mode
  20  */
  21 class BlockCaps : public ModeHandler
  22 {
  23  public:
  24         BlockCaps(InspIRCd* Instance) : ModeHandler(Instance, 'P', 0, 0, false, MODETYPE_CHANNEL, false) { }
  25
  26         ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
  27         {
  28                 if (adding)
  29                 {
  30                         if (!channel->IsModeSet('P'))
  31                         {
  32                                 channel->SetMode('P',true);
  33                                 return MODEACTION_ALLOW;
  34                         }
  35                 }
  36                 else
  37                 {
  38                         if (channel->IsModeSet('P'))
  39                         {
  40                                 channel->SetMode('P',false);
  41                                 return MODEACTION_ALLOW;
  42                         }
  43                 }
  44
  45                 return MODEACTION_DENY;
  46         }
  47 };
  48
  49 class ModuleBlockCAPS : public Module
  50 {
  51         BlockCaps* bc;
  52         int percent;
  53         unsigned int minlen;
  54         char capsmap[256];
  55 public:
  56
  57         ModuleBlockCAPS(InspIRCd* Me) : Module(Me)
  58         {
  59                 OnRehash(NULL,"");
  60                 bc = new BlockCaps(ServerInstance);
  61                 if (!ServerInstance->AddMode(bc, 'P'))
  62                         throw ModuleException("Could not add new modes!");
  63         }
  64
  65         void Implements(char* List)
  66         {
  67                 List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnRehash] = 1;
  68         }
  69
  70         virtual void OnRehash(userrec* user, const std::string &param)
  71         {
  72                 ReadConf();
  73         }
  74
  75         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
  76         {
  77                 if (target_type == TYPE_CHANNEL)
  78                 {
  79                         if ((!IS_LOCAL(user)) || (text.length() < minlen))
  80                                 return 0;
  81
  82                         chanrec* c = (chanrec*)dest;
  83
  84                         if (c->IsModeSet('P'))
  85                         {
  86                                 int caps = 0;
  87                                 for (std::string::iterator i = text.begin(); i != text.end(); i++)
  88                                         caps += capsmap[(unsigned char)*i];
  89                                 if ( ((caps*100)/(int)text.length()) >= percent )
  90                                 {
  91                                         user->WriteServ( "404 %s %s :Your line cannot be more than %d%% capital letters if it is %d or more letters long", user->nick, c->name, percent, minlen);
  92                                         return 1;
  93                                 }
  94                         }
  95                 }
  96                 return 0;
  97         }
  98
  99         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 100         {
 101                 return OnUserPreMessage(user,dest,target_type,text,status,exempt_list);
 102         }
 103
 104         void ReadConf()
 105         {
 106                 ConfigReader Conf(ServerInstance);
 107                 percent = Conf.ReadInteger("blockcaps", "percent", "100", 0, true);
 108                 minlen = Conf.ReadInteger("blockcaps", "minlen", "1", 0, true);
 109                 std::string hmap = Conf.ReadValue("blockcaps", "capsmap", 0);
 110                 if (hmap.empty())
 111                         hmap = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 112                 memset(&capsmap, 0, 255);
 113                 for (std::string::iterator n = hmap.begin(); n != hmap.end(); n++)
 114                         capsmap[(unsigned char)*n] = 1;
 115                 if (percent < 1 || percent > 100)
 116                 {
 117                         ServerInstance->Log(DEFAULT, "<blockcaps:percent> out of range, setting to default of 100.");
 118                         percent = 100;
 119                 }
 120                 if (minlen < 1 || minlen > MAXBUF-1)
 121                 {
 122                         ServerInstance->Log(DEFAULT, "<blockcaps:minlen> out of range, setting to default of 1.");
 123                         minlen = 1;
 124                 }
 125         }
 126
 127         virtual ~ModuleBlockCAPS()
 128         {
 129                 ServerInstance->Modes->DelMode(bc);
 130                 DELETE(bc);
 131         }
 132
 133         virtual Version GetVersion()
 134         {
 135                 return Version(1,1,0,0,VF_COMMON|VF_VENDOR,API_VERSION);
 136         }
 137 };
 138
 139 MODULE_INIT(ModuleBlockCAPS)