]> git.netwichtig.de Git - user/henk/code/inspircd.git/blobdiff - src/modules/m_filter.cpp
Fix module unmapping with culled Module objects
[user/henk/code/inspircd.git] / src / modules / m_filter.cpp
index 70de88e2cb8ac405d3a4614b4d6514d9e67a36e2..3f95f02c994914a572f223977d7ec9cade7d0533 100644 (file)
  *       | Inspire Internet Relay Chat Daemon |
  *       +------------------------------------+
  *
- *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
+ * See: http://wiki.inspircd.org/Credits
  *
  * This program is free but copyrighted software; see
- *            the file COPYING for details.
+ *         the file COPYING for details.
  *
  * ---------------------------------------------------
  */
 
 #include "inspircd.h"
-#include "users.h"
-#include "channels.h"
-#include "modules.h"
-#include "m_filter.h"
+#include "xline.h"
+#include "m_regex.h"
 
-/* $ModDesc: An advanced spam filtering module */
-/* $ModDep: m_filter.h */
+/* $ModDesc: Text (spam) filtering */
 
-typedef std::map<std::string,FilterResult*> filter_t;
+static std::string RegexEngine = "";
+static Module* rxengine = NULL;
+
+enum FilterFlags
+{
+       FLAG_PART = 2,
+       FLAG_QUIT = 4,
+       FLAG_PRIVMSG = 8,
+       FLAG_NOTICE = 16
+};
+
+class FilterResult : public classbase
+{
+ public:
+       std::string freeform;
+       std::string reason;
+       std::string action;
+       long gline_time;
+       std::string flags;
+
+       bool flag_no_opers;
+       bool flag_part_message;
+       bool flag_quit_message;
+       bool flag_privmsg;
+       bool flag_notice;
+
+       FilterResult(const std::string free, const std::string &rea, const std::string &act, long gt, const std::string &fla) :
+                       freeform(free), reason(rea), action(act), gline_time(gt), flags(fla)
+       {
+               this->FillFlags(fla);
+       }
+
+       int FillFlags(const std::string &fl)
+       {
+               flags = fl;
+               flag_no_opers = flag_part_message = flag_quit_message = flag_privmsg = flag_notice = false;
+               size_t x = 0;
+
+               for (std::string::const_iterator n = flags.begin(); n != flags.end(); ++n, ++x)
+               {
+                       switch (*n)
+                       {
+                               case 'o':
+                                       flag_no_opers = true;
+                               break;
+                               case 'P':
+                                       flag_part_message = true;
+                               break;
+                               case 'q':
+                                       flag_quit_message = true;
+                               break;
+                               case 'p':
+                                       flag_privmsg = true;
+                               break;
+                               case 'n':
+                                       flag_notice = true;
+                               break;
+                               case '*':
+                                       flag_no_opers = flag_part_message = flag_quit_message =
+                                               flag_privmsg = flag_notice = true;
+                               break;
+                               default:
+                                       return x;
+                               break;
+                       }
+               }
+               return 0;
+       }
+
+       FilterResult()
+       {
+       }
+
+       virtual ~FilterResult()
+       {
+       }
+};
+
+class FilterBase;
+
+class CommandFilter : public Command
+{
+       FilterBase* Base;
+ public:
+       CommandFilter(FilterBase* f)
+               : Command(reinterpret_cast<Module*>(f), "FILTER", 1, 5), Base(f)
+       {
+               flags_needed = 'o';
+               this->syntax = "<filter-definition> <action> <flags> [<gline-duration>] :<reason>";
+       }
+       CmdResult Handle(const std::vector<std::string>&, User*);
+
+       void TooFewParams(User* user, const std::string &extra_text)
+       {
+               user->WriteServ("NOTICE %s :*** Not enough parameters%s", user->nick.c_str(), extra_text.c_str());
+       }
+
+       RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
+       {
+               return ROUTE_BROADCAST;
+       }
+};
+
+class FilterBase : public Module
+{
+       CommandFilter filtcommand;
+       int flags;
+protected:
+       std::vector<std::string> exemptfromfilter; // List of channel names excluded from filtering.
+ public:
+       FilterBase();
+       virtual ~FilterBase();
+       virtual ModResult OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list);
+       virtual FilterResult* FilterMatch(User* user, const std::string &text, int flags) = 0;
+       virtual bool DeleteFilter(const std::string &freeform) = 0;
+       virtual void SyncFilters(Module* proto, void* opaque) = 0;
+       virtual void SendFilter(Module* proto, void* opaque, FilterResult* iter);
+       virtual std::pair<bool, std::string> AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration, const std::string &flags) = 0;
+       virtual ModResult OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list);
+       virtual void OnRehash(User* user);
+       virtual Version GetVersion();
+       std::string EncodeFilter(FilterResult* filter);
+       FilterResult DecodeFilter(const std::string &data);
+       virtual void OnSyncNetwork(Module* proto, void* opaque);
+       virtual void OnDecodeMetaData(Extensible* target, const std::string &extname, const std::string &extdata);
+       virtual ModResult OnStats(char symbol, User* user, string_list &results) = 0;
+       virtual ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line);
+       bool AppliesToMe(User* user, FilterResult* filter, int flags);
+       void OnLoadModule(Module* mod);
+       virtual void ReadFilters(ConfigReader &MyConf) = 0;
+};
+
+CmdResult CommandFilter::Handle(const std::vector<std::string> &parameters, User *user)
+{
+       if (parameters.size() == 1)
+       {
+               /* Deleting a filter */
+               if (Base->DeleteFilter(parameters[0]))
+               {
+                       user->WriteServ("NOTICE %s :*** Removed filter '%s'", user->nick.c_str(), parameters[0].c_str());
+                       ServerInstance->SNO->WriteToSnoMask(IS_LOCAL(user) ? 'a' : 'A', std::string("FILTER: ")+user->nick+" removed filter '"+parameters[0]+"'");
+                       return CMD_SUCCESS;
+               }
+               else
+               {
+                       user->WriteServ("NOTICE %s :*** Filter '%s' not found in list, try /stats s.", user->nick.c_str(), parameters[0].c_str());
+                       return CMD_FAILURE;
+               }
+       }
+       else
+       {
+               /* Adding a filter */
+               if (parameters.size() >= 4)
+               {
+                       std::string freeform = parameters[0];
+                       std::string type = parameters[1];
+                       std::string flags = parameters[2];
+                       std::string reason;
+                       long duration = 0;
+
+
+                       if ((type != "gline") && (type != "none") && (type != "block") && (type != "kill") && (type != "silent"))
+                       {
+                               user->WriteServ("NOTICE %s :*** Invalid filter type '%s'. Supported types are 'gline', 'none', 'block', 'silent' and 'kill'.", user->nick.c_str(), type.c_str());
+                               return CMD_FAILURE;
+                       }
+
+                       if (type == "gline")
+                       {
+                               if (parameters.size() >= 5)
+                               {
+                                       duration = ServerInstance->Duration(parameters[3]);
+                                       reason = parameters[4];
+                               }
+                               else
+                               {
+                                       this->TooFewParams(user, ": When setting a gline type filter, a gline duration must be specified as the third parameter.");
+                                       return CMD_FAILURE;
+                               }
+                       }
+                       else
+                       {
+                               reason = parameters[3];
+                       }
+                       std::pair<bool, std::string> result = Base->AddFilter(freeform, type, reason, duration, flags);
+                       if (result.first)
+                       {
+                               user->WriteServ("NOTICE %s :*** Added filter '%s', type '%s'%s%s, flags '%s', reason: '%s'", user->nick.c_str(), freeform.c_str(),
+                                               type.c_str(), (duration ? ", duration " : ""), (duration ? parameters[3].c_str() : ""),
+                                               flags.c_str(), reason.c_str());
+
+                               ServerInstance->SNO->WriteToSnoMask(IS_LOCAL(user) ? 'a' : 'A', std::string("FILTER: ")+user->nick+" added filter '"+freeform+"', type '"+type+"', "+(duration ? "duration "+parameters[3]+", " : "")+"flags '"+flags+"', reason: "+reason);
+
+                               return CMD_SUCCESS;
+                       }
+                       else
+                       {
+                               user->WriteServ("NOTICE %s :*** Filter '%s' could not be added: %s", user->nick.c_str(), freeform.c_str(), result.second.c_str());
+                               return CMD_FAILURE;
+                       }
+               }
+               else
+               {
+                       this->TooFewParams(user, ".");
+                       return CMD_FAILURE;
+               }
+
+       }
+}
+
+bool FilterBase::AppliesToMe(User* user, FilterResult* filter, int iflags)
+{
+       if ((filter->flag_no_opers) && IS_OPER(user))
+               return false;
+       if ((iflags & FLAG_PRIVMSG) && (!filter->flag_privmsg))
+               return false;
+       if ((iflags & FLAG_NOTICE) && (!filter->flag_notice))
+               return false;
+       if ((iflags & FLAG_QUIT)   && (!filter->flag_quit_message))
+               return false;
+       if ((iflags & FLAG_PART)   && (!filter->flag_part_message))
+               return false;
+       return true;
+}
+
+FilterBase::FilterBase() : filtcommand(this)
+{
+       ServerInstance->Modules->UseInterface("RegularExpression");
+       ServerInstance->AddCommand(&filtcommand);
+       Implementation eventlist[] = { I_OnPreCommand, I_OnStats, I_OnSyncNetwork, I_OnDecodeMetaData, I_OnUserPreMessage, I_OnUserPreNotice, I_OnRehash, I_OnLoadModule };
+       ServerInstance->Modules->Attach(eventlist, this, 8);
+}
+
+FilterBase::~FilterBase()
+{
+       ServerInstance->Modules->DoneWithInterface("RegularExpression");
+}
+
+ModResult FilterBase::OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
+{
+       if (!IS_LOCAL(user))
+               return MOD_RES_PASSTHRU;
+
+       flags = FLAG_PRIVMSG;
+       return OnUserPreNotice(user,dest,target_type,text,status,exempt_list);
+}
+
+ModResult FilterBase::OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
+{
+       /* Leave ulines alone */
+       if ((ServerInstance->ULine(user->server)) || (!IS_LOCAL(user)))
+               return MOD_RES_PASSTHRU;
+
+       if (!flags)
+               flags = FLAG_NOTICE;
+
+       FilterResult* f = this->FilterMatch(user, text, flags);
+       if (f)
+       {
+               std::string target = "";
+               if (target_type == TYPE_USER)
+               {
+                       User* t = (User*)dest;
+                       target = std::string(t->nick);
+               }
+               else if (target_type == TYPE_CHANNEL)
+               {
+                       Channel* t = (Channel*)dest;
+                       target = std::string(t->name);
+                       std::vector<std::string>::iterator i = find(exemptfromfilter.begin(), exemptfromfilter.end(), target);
+                       if (i != exemptfromfilter.end()) return MOD_RES_PASSTHRU;
+               }
+               if (f->action == "block")
+               {
+                       ServerInstance->SNO->WriteGlobalSno('a', std::string("FILTER: ")+user->nick+" had their message filtered, target was "+target+": "+f->reason);
+                       if (target_type == TYPE_CHANNEL)
+                               user->WriteNumeric(404, "%s %s :Message to channel blocked and opers notified (%s)",user->nick.c_str(), target.c_str(), f->reason.c_str());
+                       else
+                               user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message to "+target+" was blocked and opers notified: "+f->reason);
+               }
+               if (f->action == "silent")
+               {
+                       if (target_type == TYPE_CHANNEL)
+                               user->WriteNumeric(404, "%s %s :Message to channel blocked (%s)",user->nick.c_str(), target.c_str(), f->reason.c_str());
+                       else
+                               user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message to "+target+" was blocked: "+f->reason);
+               }
+               if (f->action == "kill")
+               {
+                       ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason);
+               }
+               if (f->action == "gline")
+               {
+                       GLine* gl = new GLine(ServerInstance->Time(), f->gline_time, ServerInstance->Config->ServerName.c_str(), f->reason.c_str(), "*", user->GetIPString());
+                       if (ServerInstance->XLines->AddLine(gl,NULL))
+                       {
+                               ServerInstance->XLines->ApplyLines();
+                       }
+                       else
+                               delete gl;
+               }
+
+               ServerInstance->Logs->Log("FILTER",DEFAULT,"FILTER: "+ user->nick + " had their message filtered, target was " + target + ": " + f->reason + " Action: " + f->action);
+               return MOD_RES_DENY;
+       }
+       return MOD_RES_PASSTHRU;
+}
+
+ModResult FilterBase::OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
+{
+       flags = 0;
+       if (validated && IS_LOCAL(user))
+       {
+               std::string checkline;
+               int replacepoint = 0;
+               bool parting = false;
+
+               if (command == "QUIT")
+               {
+                       /* QUIT with no reason: nothing to do */
+                       if (parameters.size() < 1)
+                               return MOD_RES_PASSTHRU;
+
+                       checkline = parameters[0];
+                       replacepoint = 0;
+                       parting = false;
+                       flags = FLAG_QUIT;
+               }
+               else if (command == "PART")
+               {
+                       /* PART with no reason: nothing to do */
+                       if (parameters.size() < 2)
+                               return MOD_RES_PASSTHRU;
+
+                       std::vector<std::string>::iterator i = find(exemptfromfilter.begin(), exemptfromfilter.end(), parameters[0]);
+                       if (i != exemptfromfilter.end()) return MOD_RES_PASSTHRU;
+                       checkline = parameters[1];
+                       replacepoint = 1;
+                       parting = true;
+                       flags = FLAG_PART;
+               }
+               else
+                       /* We're only messing with PART and QUIT */
+                       return MOD_RES_PASSTHRU;
+
+               FilterResult* f = NULL;
+
+               if (flags)
+                       f = this->FilterMatch(user, checkline, flags);
+
+               if (!f)
+                       /* PART or QUIT reason doesnt match a filter */
+                       return MOD_RES_PASSTHRU;
+
+               /* We cant block a part or quit, so instead we change the reason to 'Reason filtered' */
+               Command* c = ServerInstance->Parser->GetHandler(command);
+               if (c)
+               {
+                       std::vector<std::string> params;
+                       for (int item = 0; item < (int)parameters.size(); item++)
+                               params.push_back(parameters[item]);
+                       params[replacepoint] = "Reason filtered";
+
+                       /* We're blocking, OR theyre quitting and its a KILL action
+                        * (we cant kill someone whos already quitting, so filter them anyway)
+                        */
+                       if ((f->action == "block") || (((!parting) && (f->action == "kill"))) || (f->action == "silent"))
+                       {
+                               c->Handle(params, user);
+                               return MOD_RES_DENY;
+                       }
+                       else
+                       {
+                               /* Are they parting, if so, kill is applicable */
+                               if ((parting) && (f->action == "kill"))
+                               {
+                                       user->WriteServ("NOTICE %s :*** Your PART message was filtered: %s", user->nick.c_str(), f->reason.c_str());
+                                       ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason);
+                               }
+                               if (f->action == "gline")
+                               {
+                                       /* Note: We gline *@IP so that if their host doesnt resolve the gline still applies. */
+                                       GLine* gl = new GLine(ServerInstance->Time(), f->gline_time, ServerInstance->Config->ServerName.c_str(), f->reason.c_str(), "*", user->GetIPString());
+                                       if (ServerInstance->XLines->AddLine(gl,NULL))
+                                       {
+                                               ServerInstance->XLines->ApplyLines();
+                                       }
+                                       else
+                                               delete gl;
+                               }
+                               return MOD_RES_DENY;
+                       }
+               }
+               return MOD_RES_PASSTHRU;
+       }
+       return MOD_RES_PASSTHRU;
+}
+
+void FilterBase::OnRehash(User* user)
+{
+       ConfigReader MyConf;
+       std::vector<std::string>().swap(exemptfromfilter);
+       for (int index = 0; index < MyConf.Enumerate("exemptfromfilter"); ++index)
+       {
+               std::string chan = MyConf.ReadValue("exemptfromfilter", "channel", index);
+               if (!chan.empty()) {
+                       exemptfromfilter.push_back(chan);
+               }
+       }
+       std::string newrxengine = MyConf.ReadValue("filteropts", "engine", 0);
+       if (!RegexEngine.empty())
+       {
+               if (RegexEngine == newrxengine)
+                       return;
+
+               ServerInstance->SNO->WriteGlobalSno('a', "Dumping all filters due to regex engine change (was '%s', now '%s')", RegexEngine.c_str(), newrxengine.c_str());
+               //ServerInstance->XLines->DelAll("R");
+       }
+       rxengine = NULL;
+
+       RegexEngine = newrxengine;
+       modulelist* ml = ServerInstance->Modules->FindInterface("RegularExpression");
+       if (ml)
+       {
+               for (modulelist::iterator i = ml->begin(); i != ml->end(); ++i)
+               {
+                       if (RegexNameRequest(this, *i).result == newrxengine)
+                       {
+                               ServerInstance->SNO->WriteGlobalSno('a', "Filter now using engine '%s'", RegexEngine.c_str());
+                               rxengine = *i;
+                       }
+               }
+       }
+       if (!rxengine)
+       {
+               ServerInstance->SNO->WriteGlobalSno('a', "WARNING: Regex engine '%s' is not loaded - Filter functionality disabled until this is corrected.", RegexEngine.c_str());
+       }
+}
+
+void FilterBase::OnLoadModule(Module* mod)
+{
+       if (ServerInstance->Modules->ModuleHasInterface(mod, "RegularExpression"))
+       {
+               std::string rxname = RegexNameRequest(this, mod).result;
+               if (rxname == RegexEngine)
+               {
+                       rxengine = mod;
+                       /* Force a rehash to make sure that any filters that couldnt be applied from the conf
+                        * on startup or on load are applied right now.
+                        */
+                       ConfigReader Config;
+                       ServerInstance->SNO->WriteGlobalSno('a', "Found and activated regex module '%s' for m_filter.so.", RegexEngine.c_str());
+                       ReadFilters(Config);
+               }
+       }
+}
+
+
+Version FilterBase::GetVersion()
+{
+       return Version("Text (spam) filtering", VF_VENDOR | VF_COMMON, API_VERSION);
+}
+
+
+std::string FilterBase::EncodeFilter(FilterResult* filter)
+{
+       std::ostringstream stream;
+       std::string x = filter->freeform;
+
+       /* Hax to allow spaces in the freeform without changing the design of the irc protocol */
+       for (std::string::iterator n = x.begin(); n != x.end(); n++)
+               if (*n == ' ')
+                       *n = '\7';
+
+       stream << x << " " << filter->action << " " << (filter->flags.empty() ? "-" : filter->flags) << " " << filter->gline_time << " :" << filter->reason;
+       return stream.str();
+}
+
+FilterResult FilterBase::DecodeFilter(const std::string &data)
+{
+       FilterResult res;
+       irc::tokenstream tokens(data);
+       tokens.GetToken(res.freeform);
+       tokens.GetToken(res.action);
+       tokens.GetToken(res.flags);
+       if (res.flags == "-")
+               res.flags = "";
+       res.FillFlags(res.flags);
+       tokens.GetToken(res.gline_time);
+       tokens.GetToken(res.reason);
+
+       /* Hax to allow spaces in the freeform without changing the design of the irc protocol */
+       for (std::string::iterator n = res.freeform.begin(); n != res.freeform.end(); n++)
+               if (*n == '\7')
+                       *n = ' ';
+
+       return res;
+}
+
+void FilterBase::OnSyncNetwork(Module* proto, void* opaque)
+{
+       this->SyncFilters(proto, opaque);
+}
+
+void FilterBase::SendFilter(Module* proto, void* opaque, FilterResult* iter)
+{
+       proto->ProtoSendMetaData(opaque, NULL, "filter", EncodeFilter(iter));
+}
+
+void FilterBase::OnDecodeMetaData(Extensible* target, const std::string &extname, const std::string &extdata)
+{
+       if ((target == NULL) && (extname == "filter"))
+       {
+               FilterResult data = DecodeFilter(extdata);
+               this->AddFilter(data.freeform, data.action, data.reason, data.gline_time, data.flags);
+       }
+}
+
+class ImplFilter : public FilterResult
+{
+ public:
+       Regex* regex;
+
+       ImplFilter(Module* mymodule, const std::string &rea, const std::string &act, long glinetime, const std::string &pat, const std::string &flgs)
+               : FilterResult(pat, rea, act, glinetime, flgs)
+       {
+               if (!rxengine)
+                       throw ModuleException("Regex module implementing '"+RegexEngine+"' is not loaded!");
+
+               regex = RegexFactoryRequest(mymodule, rxengine, pat).Create();
+       }
+
+       ImplFilter()
+       {
+       }
+};
 
 class ModuleFilter : public FilterBase
 {
- filter_t filters;
+       std::vector<ImplFilter> filters;
+       const char *error;
+       int erroffset;
+       ImplFilter fr;
 
  public:
-       ModuleFilter(InspIRCd* Me)
-       : FilterBase(Me, "m_filter.so")
+       ModuleFilter()
        {
-               OnRehash(NULL,"");
+               OnRehash(NULL);
        }
-       
+
        virtual ~ModuleFilter()
        {
        }
 
-       virtual FilterResult* FilterMatch(userrec* user, const std::string &text, int flags)
+       virtual FilterResult* FilterMatch(User* user, const std::string &text, int flgs)
        {
-               for (filter_t::iterator index = filters.begin(); index != filters.end(); index++)
+               for (std::vector<ImplFilter>::iterator index = filters.begin(); index != filters.end(); index++)
                {
-
                        /* Skip ones that dont apply to us */
-                       if (!FilterBase::AppliesToMe(user, index->second, flags))
+                       if (!FilterBase::AppliesToMe(user, dynamic_cast<FilterResult*>(&(*index)), flgs))
                                continue;
 
-                       if (ServerInstance->MatchText(text,index->first))
+                       //ServerInstance->Logs->Log("m_filter", DEBUG, "Match '%s' against '%s'", text.c_str(), index->freeform.c_str());
+                       if (index->regex->Matches(text))
                        {
-                               FilterResult* fr = index->second;
+                               //ServerInstance->Logs->Log("m_filter", DEBUG, "MATCH");
+                               fr = *index;
                                if (index != filters.begin())
                                {
-                                       std::string pat = index->first;
+                                       /* Move to head of list for efficiency */
                                        filters.erase(index);
-                                       filters.insert(filters.begin(), std::make_pair(pat,fr));
+                                       filters.insert(filters.begin(), fr);
                                }
-                               return fr;
+                               return &fr;
                        }
+                       //ServerInstance->Logs->Log("m_filter", DEBUG, "NO MATCH");
                }
                return NULL;
        }
 
        virtual bool DeleteFilter(const std::string &freeform)
        {
-               if (filters.find(freeform) != filters.end())
+               for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
                {
-                       delete (filters.find(freeform))->second;
-                       filters.erase(filters.find(freeform));
-                       return true;
+                       if (i->freeform == freeform)
+                       {
+                               delete i->regex;
+                               filters.erase(i);
+                               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 &flags)
+       virtual void SyncFilters(Module* proto, void* opaque)
        {
-               if (filters.find(freeform) != filters.end())
+               for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
                {
-                       return std::make_pair(false, "Filter already exists");
+                       this->SendFilter(proto, opaque, &(*i));
                }
-
-               FilterResult* x = new FilterResult(freeform, reason, type, duration, flags);
-               filters[freeform] = x;
-
-               return std::make_pair(true, "");
        }
 
-       virtual void SyncFilters(Module* proto, void* opaque)
+       virtual std::pair<bool, std::string> AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration, const std::string &flgs)
        {
-               for (filter_t::iterator n = filters.begin(); n != filters.end(); n++)
+               for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
                {
-                       this->SendFilter(proto, opaque, n->second);
+                       if (i->freeform == freeform)
+                       {
+                               return std::make_pair(false, "Filter already exists");
+                       }
                }
+
+               try
+               {
+                       filters.push_back(ImplFilter(this, reason, type, duration, freeform, flgs));
+               }
+               catch (ModuleException &e)
+               {
+                       ServerInstance->Logs->Log("m_filter", DEFAULT, "Error in regular expression '%s': %s", freeform.c_str(), e.GetReason());
+                       return std::make_pair(false, e.GetReason());
+               }
+               return std::make_pair(true, "");
        }
 
-       virtual void OnRehash(userrec* user, const std::string &parameter)
+       virtual void OnRehash(User* user)
        {
-               ConfigReader* MyConf = new ConfigReader(ServerInstance);
+               ConfigReader MyConf;
+               FilterBase::OnRehash(user);
+               ReadFilters(MyConf);
+       }
 
-               for (int index = 0; index < MyConf->Enumerate("keyword"); index++)
+       void ReadFilters(ConfigReader &MyConf)
+       {
+               for (int index = 0; index < MyConf.Enumerate("keyword"); index++)
                {
-                       this->DeleteFilter(MyConf->ReadValue("keyword","pattern",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);
-                       std::string flags = MyConf->ReadValue("keyword","flags",index);
-                       long gline_time = ServerInstance->Duration(MyConf->ReadValue("keyword","duration",index));
-                       if (do_action.empty())
-                               do_action = "none";
-                       if (flags.empty())
-                               flags = "*";
-                       FilterResult* x = new FilterResult(pattern, reason, do_action, gline_time, flags);
-                       filters[pattern] = x;
+                       std::string pattern = MyConf.ReadValue("keyword", "pattern", index);
+                       std::string reason = MyConf.ReadValue("keyword", "reason", index);
+                       std::string action = MyConf.ReadValue("keyword", "action", index);
+                       std::string flgs = MyConf.ReadValue("keyword", "flags", index);
+                       long gline_time = ServerInstance->Duration(MyConf.ReadValue("keyword", "duration", index));
+                       if (action.empty())
+                               action = "none";
+                       if (flgs.empty())
+                               flgs = "*";
+
+                       try
+                       {
+                               filters.push_back(ImplFilter(this, reason, action, gline_time, pattern, flgs));
+                               ServerInstance->Logs->Log("m_filter", DEFAULT, "Regular expression %s loaded.", pattern.c_str());
+                       }
+                       catch (ModuleException &e)
+                       {
+                               ServerInstance->Logs->Log("m_filter", DEFAULT, "Error in regular expression '%s': %s", pattern.c_str(), e.GetReason());
+                       }
                }
-               DELETE(MyConf);
        }
 
-       virtual int OnStats(char symbol, userrec* user, string_list &results)
+       virtual ModResult OnStats(char symbol, User* user, string_list &results)
        {
                if (symbol == 's')
                {
                        std::string sn = ServerInstance->Config->ServerName;
-                       for (filter_t::iterator n = filters.begin(); n != filters.end(); n++)
+                       for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
+                       {
+                               results.push_back(sn+" 223 "+user->nick+" :"+RegexEngine+":"+i->freeform+" "+i->flags+" "+i->action+" "+ConvToStr(i->gline_time)+" :"+i->reason);
+                       }
+                       for (std::vector<std::string>::iterator i = exemptfromfilter.begin(); i != exemptfromfilter.end(); ++i)
                        {
-                               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);
+                               results.push_back(sn+" 223 "+user->nick+" :EXEMPT "+(*i));
                        }
                }
-               return 0;
+               return MOD_RES_PASSTHRU;
        }
 };
 
-
 MODULE_INIT(ModuleFilter)