src/modules/m_filter.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 // Message and notice filtering using glob patterns
  20 // a module based on the original work done by Craig Edwards in 2003
  21 // for the chatspike network.
  22
  23 #include <stdio.h>
  24 #include <string>
  25 #include "users.h"
  26 #include "channels.h"
  27 #include "modules.h"
  28 #include "inspircd.h"
  29 #include "m_filter.h"
  30
  31 /* $ModDesc: An advanced spam filtering module */
  32 /* $ModDep: m_filter.h */
  33
  34 typedef std::map<std::string,FilterResult*> filter_t;
  35
  36 class ModuleFilter : public FilterBase
  37 {
  38
  39  filter_t filters;
  40
  41  public:
  42         ModuleFilter(InspIRCd* Me)
  43                 : FilterBase::FilterBase(Me)
  44         {
  45                 // read the configuration file on startup.
  46                 // it is perfectly valid to set <filter file> to the value of the
  47                 // main config file, then append your <keyword> tags to the bottom
  48                 // of the main config... but rather messy. That's why the capability
  49                 // of using a seperate config file is provided.
  50                 OnRehash("");
  51         }
  52
  53         virtual ~ModuleFilter()
  54         {
  55         }
  56
  57         virtual FilterResult* FilterMatch(const std::string &text)
  58         {
  59                 std::string text2 = text+" ";
  60                 for (filter_t::iterator index = filters.begin(); index != filters.end(); index++)
  61                 {
  62                         if ((ServerInstance->MatchText(text2,index->first)) || (ServerInstance->MatchText(text,index->first)))
  63                         {
  64                                 return index->second;
  65                         }
  66                 }
  67                 return NULL;
  68         }
  69
  70         virtual void OnRehash(const std::string &parameter)
  71         {
  72                 // this automatically re-reads the configuration file into the class
  73                 ConfigReader* MyConf = new ConfigReader(ServerInstance);
  74                 for (filter_t::iterator n = filters.begin(); n != filters.end(); n++)
  75                 {
  76                         DELETE(n->second);
  77                 }
  78                 filters.clear();
  79                 for (int index = 0; index < MyConf->Enumerate("keyword"); index++)
  80                 {
  81                         std::string pattern = MyConf->ReadValue("keyword","pattern",index);
  82                         std::string reason = MyConf->ReadValue("keyword","reason",index);
  83                         std::string do_action = MyConf->ReadValue("keyword","action",index);
  84                         long gline_time = ServerInstance->Duration(MyConf->ReadValue("keyword","duration",index).c_str());
  85                         if (do_action == "")
  86                                 do_action = "none";
  87                         FilterResult* x = new FilterResult;
  88                         x->reason = reason;
  89                         x->action = do_action;
  90                         x->gline_time = gline_time;
  91                         filters[pattern] = x;
  92                 }
  93                 DELETE(MyConf);
  94         }
  95 };
  96
  97 // stuff down here is the module-factory stuff. For basic modules you can ignore this.
  98
  99 class ModuleFilterFactory : public ModuleFactory
 100 {
 101  public:
 102         ModuleFilterFactory()
 103         {
 104         }
 105
 106         ~ModuleFilterFactory()
 107         {
 108         }
 109
 110         virtual Module * CreateModule(InspIRCd* Me)
 111         {
 112                 return new ModuleFilter(Me);
 113         }
 114
 115 };
 116
 117
 118 extern "C" void * init_module( void )
 119 {
 120         return new ModuleFilterFactory;
 121 }
 122