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[user/henk/code/inspircd.git] / src / modules / m_filter.cpp
index e08ba479c9feed5adba0bff124bbc3c6f86350c5..2be2cfeca39a912d8d3d5366a6cf50d7ba1e3458 100644 (file)
  *       | Inspire Internet Relay Chat Daemon |
  *       +------------------------------------+
  *
- *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
- *                       E-mail:
- *                <brain@chatspike.net>
- *               <Craig@chatspike.net>
- *     
- * Written by Craig Edwards, Craig McLure, and others.
+ *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
  * This program is free but copyrighted software; see
  *            the file COPYING for details.
  *
  * ---------------------------------------------------
  */
 
-using namespace std;
-
-// Message and notice filtering using glob patterns
-// a module based on the original work done by Craig Edwards in 2003
-// for the chatspike network.
+#include "inspircd.h"
+#include "m_filter.h"
 
-#include <stdio.h>
-#include <string>
-#include "users.h"
-#include "channels.h"
-#include "modules.h"
-#include "helperfuncs.h"
+/* $ModDesc: An advanced spam filtering module */
+/* $ModDep: m_filter.h */
 
-/* $ModDesc: An enhanced version of the unreal m_filter.so used by chatspike.net */
+typedef std::map<std::string,FilterResult*> filter_t;
 
-class Filter
+class ModuleFilter : public FilterBase
 {
- public:
-       std::string reason;
-       std::string action;
-};
-
-typedef std::map<std::string,Filter*> filter_t;
+ filter_t filters;
 
-class FilterException : public ModuleException
-{
  public:
-       virtual char* GetReason()
+       ModuleFilter(InspIRCd* Me)
+       : FilterBase(Me, "m_filter.so")
        {
-               return "Could not find <filter file=\"\"> definition in your config file!";
-       }
-};
+               OnRehash(NULL,"");
 
-class ModuleFilter : public Module
-{
- Server *Srv;
- filter_t filters;
- public:
-       ModuleFilter(Server* Me)
-               : Module::Module(Me)
-       {
-               // read the configuration file on startup.
-               // it is perfectly valid to set <filter file> to the value of the
-               // main config file, then append your <keyword> tags to the bottom
-               // of the main config... but rather messy. That's why the capability
-               // of using a seperate config file is provided.
-               Srv = Me;
-               OnRehash("");
        }
        
        virtual ~ModuleFilter()
        {
        }
 
-       void Implements(char* List)
-       {
-               List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnRehash] = 1;
-       }
-       
-       // format of a config entry is <keyword pattern="*glob*" reason="Some reason here" action="kill/block">
-       
-       virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text, char status)
-       {
-               return OnUserPreNotice(user,dest,target_type,text,status);
-       }
-       
-       virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text, char status)
+       virtual FilterResult* FilterMatch(User* user, const std::string &text, int iflags)
        {
-               std::string text2 = text+" ";
                for (filter_t::iterator index = filters.begin(); index != filters.end(); index++)
                {
-                       if ((Srv->MatchText(text2,index->first)) || (Srv->MatchText(text,index->first)))
-                       {
-                               Filter* f = (Filter*)index->second;
-                               std::string target = "";
 
-                               if (target_type == TYPE_USER)
-                               {
-                                       userrec* t = (userrec*)dest;
-                                       target = std::string(t->nick);
-                               }
-                               else if (target_type == TYPE_CHANNEL)
-                               {
-                                       chanrec* t = (chanrec*)dest;
-                                       target = std::string(t->name);
-                               }
+                       /* Skip ones that dont apply to us */
+                       if (!FilterBase::AppliesToMe(user, index->second, iflags))
+                               continue;
 
-                               if (f->action == "block")
-                               {       
-                                       Srv->SendOpers(std::string("FILTER: ")+std::string(user->nick)+
-                                                       std::string(" had their notice filtered, target was ")+
-                                                       target+": "+f->reason);
-                                       Srv->SendTo(NULL,user,"NOTICE "+std::string(user->nick)+
-                                                       " :Your notice has been filtered and opers notified: "+f->reason);
-                               }
-                               Srv->Log(DEFAULT,std::string("FILTER: ")+std::string(user->nick)+
-                                               std::string(" had their notice filtered, target was ")+
-                                               target+": "+f->reason+" Action: "+f->action);
-
-                               if (f->action == "kill")
+                       if (ServerInstance->MatchText(text,index->first))
+                       {
+                               FilterResult* fr = index->second;
+                               if (index != filters.begin())
                                {
-                                       Srv->QuitUser(user,f->reason);
+                                       std::string pat = index->first;
+                                       filters.erase(index);
+                                       filters.insert(filters.begin(), std::make_pair(pat,fr));
                                }
-                               return 1;
+                               return fr;
                        }
                }
-               return 0;
+               return NULL;
        }
-       
-       virtual void OnRehash(const std::string &parameter)
+
+       virtual bool DeleteFilter(const std::string &freeform)
+       {
+               if (filters.find(freeform) != filters.end())
+               {
+                       delete (filters.find(freeform))->second;
+                       filters.erase(filters.find(freeform));
+                       return true;
+               }
+               return false;
+       }
+
+       virtual std::pair<bool, std::string> AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration, const std::string &sflags)
        {
-               // reload our config file on rehash - we must destroy and re-allocate the classes
-               // to call the constructor again and re-read our data.
-               ConfigReader* Conf = new ConfigReader;
-               std::string filterfile = Conf->ReadValue("filter","file",0);
-               // this automatically re-reads the configuration file into the class
-               ConfigReader* MyConf = new ConfigReader(filterfile);
-               if ((filterfile == "") || (!MyConf->Verify()))
+               if (filters.find(freeform) != filters.end())
                {
-                       // bail if the user forgot to create a config file
-                       FilterException e;
-                       throw(e);
+                       return std::make_pair(false, "Filter already exists");
                }
+
+               FilterResult* x = new FilterResult(freeform, reason, type, duration, sflags);
+               filters[freeform] = x;
+
+               return std::make_pair(true, "");
+       }
+
+       virtual void SyncFilters(Module* proto, void* opaque)
+       {
                for (filter_t::iterator n = filters.begin(); n != filters.end(); n++)
                {
-                       delete n->second;
+                       this->SendFilter(proto, opaque, n->second);
                }
-               filters.clear();
+       }
+
+       virtual void OnRehash(User* user, const std::string &parameter)
+       {
+               ConfigReader* MyConf = new ConfigReader(ServerInstance);
+
                for (int index = 0; index < MyConf->Enumerate("keyword"); index++)
                {
+                       this->DeleteFilter(MyConf->ReadValue("keyword","pattern",index));
+
                        std::string pattern = MyConf->ReadValue("keyword","pattern",index);
                        std::string reason = MyConf->ReadValue("keyword","reason",index);
                        std::string do_action = MyConf->ReadValue("keyword","action",index);
-                       if (do_action == "")
+                       std::string sflags = MyConf->ReadValue("keyword","flags",index);
+                       long gline_time = ServerInstance->Duration(MyConf->ReadValue("keyword","duration",index));
+                       if (do_action.empty())
                                do_action = "none";
-                       Filter* x = new Filter;
-                       x->reason = reason;
-                       x->action = do_action;
+                       if (sflags.empty())
+                               sflags = "*";
+                       FilterResult* x = new FilterResult(pattern, reason, do_action, gline_time, sflags);
                        filters[pattern] = x;
                }
-               Srv->Log(DEFAULT,std::string("m_filter: read configuration from ")+filterfile);
-               delete Conf;
                delete MyConf;
+               FilterBase::OnRehash(user, parameter);
        }
-       
-       virtual Version GetVersion()
-       {
-               // This is version 2 because version 1.x is the unreleased unrealircd module
-               return Version(2,0,0,2,VF_VENDOR);
-       }
-       
-};
 
-// stuff down here is the module-factory stuff. For basic modules you can ignore this.
-
-class ModuleFilterFactory : public ModuleFactory
-{
- public:
-       ModuleFilterFactory()
-       {
-       }
-       
-       ~ModuleFilterFactory()
-       {
-       }
-       
-       virtual Module * CreateModule(Server* Me)
+       virtual int OnStats(char symbol, User* user, string_list &results)
        {
-               return new ModuleFilter(Me);
+               if (symbol == 's')
+               {
+                       std::string sn = ServerInstance->Config->ServerName;
+                       for (filter_t::iterator n = filters.begin(); n != filters.end(); n++)
+                       {
+                               results.push_back(sn+" 223 "+user->nick+" :GLOB:"+n->second->freeform+" "+n->second->flags+" "+n->second->action+" "+ConvToStr(n->second->gline_time)+" :"+n->second->reason);
+                       }
+               }
+               return 0;
        }
-       
 };
 
 
-extern "C" void * init_module( void )
-{
-       return new ModuleFilterFactory;
-}
-
+MODULE_INIT(ModuleFilter)