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, "m_filter.so")
  44         {
  45                 OnRehash("");
  46         }
  47
  48         virtual ~ModuleFilter()
  49         {
  50         }
  51
  52         virtual FilterResult* FilterMatch(const std::string &text)
  53         {
  54                 std::string text2 = text+" ";
  55                 for (filter_t::iterator index = filters.begin(); index != filters.end(); index++)
  56                 {
  57                         if ((ServerInstance->MatchText(text2,index->first)) || (ServerInstance->MatchText(text,index->first)))
  58                         {
  59                                 return index->second;
  60                         }
  61                 }
  62                 return NULL;
  63         }
  64
  65         virtual bool DeleteFilter(const std::string &freeform)
  66         {
  67                 if (filters.find(freeform) != filters.end())
  68                 {
  69                         filters.erase(filters.find(freeform));
  70                         return true;
  71                 }
  72                 return false;
  73         }
  74
  75         virtual std::pair<bool, std::string> AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration)
  76         {
  77                 if (filters.find(freeform) != filters.end())
  78                 {
  79                         return std::make_pair(false, "Filter already exists");
  80                 }
  81
  82                 FilterResult* x = new FilterResult;
  83                 x->reason = reason;
  84                 x->action = type;
  85                 x->gline_time = duration;
  86                 x->freeform = freeform;
  87                 filters[freeform] = x;
  88
  89                 return std::make_pair(true, "");
  90         }
  91
  92         virtual void SyncFilters(Module* proto, void* opaque)
  93         {
  94                 for (filter_t::iterator n = filters.begin(); n != filters.end(); n++)
  95                 {
  96                         this->SendFilter(proto, opaque, n->second);
  97                 }
  98         }
  99
 100         virtual void OnRehash(const std::string &parameter)
 101         {
 102                 // this automatically re-reads the configuration file into the class
 103                 ConfigReader* MyConf = new ConfigReader(ServerInstance);
 104                 for (filter_t::iterator n = filters.begin(); n != filters.end(); n++)
 105                 {
 106                         DELETE(n->second);
 107                 }
 108                 filters.clear();
 109                 for (int index = 0; index < MyConf->Enumerate("keyword"); index++)
 110                 {
 111                         std::string pattern = MyConf->ReadValue("keyword","pattern",index);
 112                         std::string reason = MyConf->ReadValue("keyword","reason",index);
 113                         std::string do_action = MyConf->ReadValue("keyword","action",index);
 114                         long gline_time = ServerInstance->Duration(MyConf->ReadValue("keyword","duration",index).c_str());
 115                         if (do_action == "")
 116                                 do_action = "none";
 117                         FilterResult* x = new FilterResult;
 118                         x->reason = reason;
 119                         x->action = do_action;
 120                         x->gline_time = gline_time;
 121                         x->freeform = pattern;
 122                         filters[pattern] = x;
 123                 }
 124                 DELETE(MyConf);
 125         }
 126 };
 127
 128 // stuff down here is the module-factory stuff. For basic modules you can ignore this.
 129
 130 class ModuleFilterFactory : public ModuleFactory
 131 {
 132  public:
 133         ModuleFilterFactory()
 134         {
 135         }
 136
 137         ~ModuleFilterFactory()
 138         {
 139         }
 140
 141         virtual Module * CreateModule(InspIRCd* Me)
 142         {
 143                 return new ModuleFilter(Me);
 144         }
 145
 146 };
 147
 148
 149 extern "C" void * init_module( void )
 150 {
 151         return new ModuleFilterFactory;
 152 }
 153