X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fmodules%2Fm_filter.cpp;h=8bfefd6eb412559f9a17149add53ef22ad11f703;hb=8790551dc182cd8804ee7d8ef89ccb31067cc2a4;hp=133406ccb7e33d9f4fd51a898cb98e19ef565000;hpb=35521473bbca1574a81b7d3e9aac3392fbcd2d50;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_filter.cpp b/src/modules/m_filter.cpp index 133406ccb..8bfefd6eb 100644 --- a/src/modules/m_filter.cpp +++ b/src/modules/m_filter.cpp @@ -1,162 +1,748 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2007 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * Copyright (C) 2009 Daniel De Graaf + * Copyright (C) 2004, 2008 Craig Edwards + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2007 Robin Burchell * - * This program is free but copyrighted software; see - * the file COPYING for details. + * This file is part of InspIRCd. InspIRCd is free software: you can + * redistribute it and/or modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation, version 2. * - * --------------------------------------------------- + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ -#include -#include -#include "users.h" -#include "channels.h" -#include "modules.h" + #include "inspircd.h" -#include "m_filter.h" +#include "xline.h" +#include "modules/regex.h" + +/* $ModDesc: Text (spam) filtering */ + +class ModuleFilter; -/* $ModDesc: An advanced spam filtering module */ -/* $ModDep: m_filter.h */ +enum FilterFlags +{ + FLAG_PART = 2, + FLAG_QUIT = 4, + FLAG_PRIVMSG = 8, + FLAG_NOTICE = 16 +}; -typedef std::map filter_t; +enum FilterAction +{ + FA_GLINE, + FA_BLOCK, + FA_SILENT, + FA_KILL, + FA_NONE +}; -class ModuleFilter : public FilterBase +class FilterResult { - - filter_t filters; + public: + std::string freeform; + std::string reason; + FilterAction action; + long gline_time; + + bool flag_no_opers; + bool flag_part_message; + bool flag_quit_message; + bool flag_privmsg; + bool flag_notice; + bool flag_strip_color; + + FilterResult(const std::string free, const std::string &rea, FilterAction act, long gt, const std::string &fla) : + freeform(free), reason(rea), action(act), gline_time(gt) + { + this->FillFlags(fla); + } + + char FillFlags(const std::string &fl) + { + flag_no_opers = flag_part_message = flag_quit_message = flag_privmsg = + flag_notice = flag_strip_color = false; + + for (std::string::const_iterator n = fl.begin(); n != fl.end(); ++n) + { + 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 'c': + flag_strip_color = true; + break; + case '*': + flag_no_opers = flag_part_message = flag_quit_message = + flag_privmsg = flag_notice = flag_strip_color = true; + break; + default: + return *n; + break; + } + } + return 0; + } + + std::string GetFlags() + { + std::string flags; + if (flag_no_opers) + flags.push_back('o'); + if (flag_part_message) + flags.push_back('P'); + if (flag_quit_message) + flags.push_back('q'); + if (flag_privmsg) + flags.push_back('p'); + if (flag_notice) + flags.push_back('n'); + + /* Order is important here, 'c' must be the last char in the string as it is unsupported + * on < 2.0.10, and the logic in FillFlags() stops parsing when it ecounters an unknown + * character. + */ + if (flag_strip_color) + flags.push_back('c'); + + if (flags.empty()) + flags.push_back('-'); + + return flags; + } + + FilterResult() + { + } +}; +class CommandFilter : public Command +{ public: - ModuleFilter(InspIRCd* Me) - : FilterBase::FilterBase(Me, "m_filter.so") + CommandFilter(Module* f) + : Command(f, "FILTER", 1, 5) { - OnRehash(NULL,""); + flags_needed = 'o'; + this->syntax = " [] :"; } - - virtual ~ModuleFilter() + CmdResult Handle(const std::vector&, User*); + + RouteDescriptor GetRouting(User* user, const std::vector& parameters) { + return ROUTE_BROADCAST; } +}; + +class ImplFilter : public FilterResult +{ + public: + Regex* regex; + + ImplFilter(ModuleFilter* mymodule, const std::string &rea, FilterAction act, long glinetime, const std::string &pat, const std::string &flgs); +}; + + +class ModuleFilter : public Module +{ + bool initing; + RegexFactory* factory; + void FreeFilters(); + + public: + CommandFilter filtcommand; + dynamic_reference RegexEngine; - virtual FilterResult* FilterMatch(const std::string &text) + std::vector filters; + int flags; + + std::set exemptfromfilter; // List of channel names excluded from filtering. + + ModuleFilter(); + void init(); + CullResult cull(); + ModResult OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list); + FilterResult* FilterMatch(User* user, const std::string &text, int flags); + bool DeleteFilter(const std::string &freeform); + std::pair AddFilter(const std::string &freeform, FilterAction type, const std::string &reason, long duration, const std::string &flags); + ModResult OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list); + void OnRehash(User* user); + Version GetVersion(); + std::string EncodeFilter(FilterResult* filter); + FilterResult DecodeFilter(const std::string &data); + void OnSyncNetwork(Module* proto, void* opaque); + void OnDecodeMetaData(Extensible* target, const std::string &extname, const std::string &extdata); + ModResult OnStats(char symbol, User* user, string_list &results); + ModResult OnPreCommand(std::string &command, std::vector ¶meters, LocalUser *user, bool validated, const std::string &original_line); + void OnUnloadModule(Module* mod); + bool AppliesToMe(User* user, FilterResult* filter, int flags); + void ReadFilters(); + static bool StringToFilterAction(const std::string& str, FilterAction& fa); + static std::string FilterActionToString(FilterAction fa); +}; + +CmdResult CommandFilter::Handle(const std::vector ¶meters, User *user) +{ + if (parameters.size() == 1) { - std::string text2 = text+" "; - for (filter_t::iterator index = filters.begin(); index != filters.end(); index++) + /* Deleting a filter */ + Module *me = creator; + if (static_cast(me)->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', "FILTER: "+user->nick+" removed filter '"+parameters[0]+"'"); + return CMD_SUCCESS; + } + else { - if ((ServerInstance->MatchText(text2,index->first)) || (ServerInstance->MatchText(text,index->first))) + 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) + { + const std::string& freeform = parameters[0]; + FilterAction type; + const std::string& flags = parameters[2]; + unsigned int reasonindex; + long duration = 0; + + if (!ModuleFilter::StringToFilterAction(parameters[1], type)) + { + user->WriteServ("NOTICE %s :*** Invalid filter type '%s'. Supported types are 'gline', 'none', 'block', 'silent' and 'kill'.", user->nick.c_str(), parameters[1].c_str()); + return CMD_FAILURE; + } + + if (type == FA_GLINE) { - FilterResult* fr = index->second; - if (index != filters.begin()) + if (parameters.size() >= 5) { - std::string pat = index->first; - filters.erase(index); - filters.insert(filters.begin(), std::make_pair(pat,fr)); + duration = InspIRCd::Duration(parameters[3]); + reasonindex = 4; } - return fr; + else + { + user->WriteServ("NOTICE %s :*** Not enough parameters: When setting a gline type filter, a gline duration must be specified as the third parameter.", user->nick.c_str()); + return CMD_FAILURE; + } + } + else + { + reasonindex = 3; + } + + Module *me = creator; + std::pair result = static_cast(me)->AddFilter(freeform, type, parameters[reasonindex], 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(), + parameters[1].c_str(), (duration ? ", duration " : ""), (duration ? parameters[3].c_str() : ""), + flags.c_str(), parameters[reasonindex].c_str()); + + ServerInstance->SNO->WriteToSnoMask(IS_LOCAL(user) ? 'a' : 'A', "FILTER: "+user->nick+" added filter '"+freeform+"', type '"+parameters[1]+"', "+(duration ? "duration "+parameters[3]+", " : "")+"flags '"+flags+"', reason: "+parameters[reasonindex]); + + 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; } } - return NULL; + else + { + user->WriteServ("NOTICE %s :*** Not enough parameters.", user->nick.c_str()); + return CMD_FAILURE; + } + } +} + +bool ModuleFilter::AppliesToMe(User* user, FilterResult* filter, int iflags) +{ + if ((filter->flag_no_opers) && user->IsOper()) + 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; +} + +ModuleFilter::ModuleFilter() + : initing(true), filtcommand(this), RegexEngine(this, "regex") +{ +} + +void ModuleFilter::init() +{ + ServerInstance->Modules->AddService(filtcommand); + Implementation eventlist[] = { I_OnPreCommand, I_OnStats, I_OnSyncNetwork, I_OnDecodeMetaData, I_OnUserPreMessage, I_OnUserPreNotice, I_OnRehash, I_OnUnloadModule }; + ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation)); + OnRehash(NULL); +} + +CullResult ModuleFilter::cull() +{ + FreeFilters(); + return Module::cull(); +} + +void ModuleFilter::FreeFilters() +{ + for (std::vector::const_iterator i = filters.begin(); i != filters.end(); ++i) + delete i->regex; + + filters.clear(); +} + +ModResult ModuleFilter::OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list) +{ + if (!IS_LOCAL(user)) + return MOD_RES_PASSTHRU; - virtual bool DeleteFilter(const std::string &freeform) + flags = FLAG_PRIVMSG; + return OnUserPreNotice(user,dest,target_type,text,status,exempt_list); +} + +ModResult ModuleFilter::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) { - if (filters.find(freeform) != filters.end()) + std::string target; + if (target_type == TYPE_USER) { - delete (filters.find(freeform))->second; - filters.erase(filters.find(freeform)); - return true; + User* t = (User*)dest; + target = t->nick; } - return false; + else if (target_type == TYPE_CHANNEL) + { + Channel* t = (Channel*)dest; + if (exemptfromfilter.find(t->name) != exemptfromfilter.end()) + return MOD_RES_PASSTHRU; + + target = t->name; + } + if (f->action == FA_BLOCK) + { + ServerInstance->SNO->WriteGlobalSno('a', "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 "+user->nick+" :Your message to "+target+" was blocked and opers notified: "+f->reason); + } + else if (f->action == FA_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 "+user->nick+" :Your message to "+target+" was blocked: "+f->reason); + } + else if (f->action == FA_KILL) + { + ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason); + } + else if (f->action == FA_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",LOG_DEFAULT,"FILTER: "+ user->nick + " had their message filtered, target was " + target + ": " + f->reason + " Action: " + ModuleFilter::FilterActionToString(f->action)); + return MOD_RES_DENY; } + return MOD_RES_PASSTHRU; +} - virtual std::pair AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration) +ModResult ModuleFilter::OnPreCommand(std::string &command, std::vector ¶meters, LocalUser *user, bool validated, const std::string &original_line) +{ + if (validated && IS_LOCAL(user)) { - if (filters.find(freeform) != filters.end()) + flags = 0; + bool parting; + + if (command == "QUIT") { - return std::make_pair(false, "Filter already exists"); + /* QUIT with no reason: nothing to do */ + if (parameters.size() < 1) + return MOD_RES_PASSTHRU; + + parting = false; + flags = FLAG_QUIT; + } + else if (command == "PART") + { + /* PART with no reason: nothing to do */ + if (parameters.size() < 2) + return MOD_RES_PASSTHRU; + + if (exemptfromfilter.find(parameters[0]) != exemptfromfilter.end()) + return MOD_RES_PASSTHRU; + + parting = true; + flags = FLAG_PART; + } + else + /* We're only messing with PART and QUIT */ + return MOD_RES_PASSTHRU; + + FilterResult* f = this->FilterMatch(user, parameters[parting ? 1 : 0], 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' */ + parameters[parting ? 1 : 0] = "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 == FA_BLOCK) || (((!parting) && (f->action == FA_KILL))) || (f->action == FA_SILENT)) + { + return MOD_RES_PASSTHRU; + } + else + { + /* Are they parting, if so, kill is applicable */ + if ((parting) && (f->action == FA_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 == FA_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; +} + +void ModuleFilter::OnRehash(User* user) +{ + ConfigTagList tags = ServerInstance->Config->ConfTags("exemptfromfilter"); + exemptfromfilter.clear(); + for (ConfigIter i = tags.first; i != tags.second; ++i) + { + std::string chan = i->second->getString("channel"); + if (!chan.empty()) + exemptfromfilter.insert(chan); + } + + std::string newrxengine = ServerInstance->Config->ConfValue("filteropts")->getString("engine"); + + factory = RegexEngine ? (RegexEngine.operator->()) : NULL; + + if (newrxengine.empty()) + RegexEngine.SetProvider("regex"); + else + RegexEngine.SetProvider("regex/" + newrxengine); - FilterResult* x = new FilterResult; - x->reason = reason; - x->action = type; - x->gline_time = duration; - x->freeform = freeform; - filters[freeform] = x; + if (!RegexEngine) + { + if (newrxengine.empty()) + ServerInstance->SNO->WriteGlobalSno('a', "WARNING: No regex engine loaded - Filter functionality disabled until this is corrected."); + else + ServerInstance->SNO->WriteGlobalSno('a', "WARNING: Regex engine '%s' is not loaded - Filter functionality disabled until this is corrected.", newrxengine.c_str()); + + initing = false; + FreeFilters(); + return; + } + + if ((!initing) && (RegexEngine.operator->() != factory)) + { + ServerInstance->SNO->WriteGlobalSno('a', "Dumping all filters due to regex engine change"); + FreeFilters(); + } + + initing = false; + ReadFilters(); +} + +Version ModuleFilter::GetVersion() +{ + return Version("Text (spam) filtering", VF_VENDOR | VF_COMMON, RegexEngine ? RegexEngine->name : ""); +} + +std::string ModuleFilter::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 << " " << FilterActionToString(filter->action) << " " << filter->GetFlags() << " " << filter->gline_time << " :" << filter->reason; + return stream.str(); +} + +FilterResult ModuleFilter::DecodeFilter(const std::string &data) +{ + std::string filteraction; + FilterResult res; + irc::tokenstream tokens(data); + tokens.GetToken(res.freeform); + tokens.GetToken(filteraction); + if (!StringToFilterAction(filteraction, res.action)) + throw ModuleException("Invalid action: " + filteraction); + + std::string filterflags; + tokens.GetToken(filterflags); + char c = res.FillFlags(filterflags); + if (c != 0) + throw ModuleException("Invalid flag: '" + std::string(1, c) + "'"); + + 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; +} - return std::make_pair(true, ""); +void ModuleFilter::OnSyncNetwork(Module* proto, void* opaque) +{ + for (std::vector::iterator i = filters.begin(); i != filters.end(); ++i) + { + proto->ProtoSendMetaData(opaque, NULL, "filter", EncodeFilter(&(*i))); } +} - virtual void SyncFilters(Module* proto, void* opaque) +void ModuleFilter::OnDecodeMetaData(Extensible* target, const std::string &extname, const std::string &extdata) +{ + if ((target == NULL) && (extname == "filter")) { - for (filter_t::iterator n = filters.begin(); n != filters.end(); n++) + try { - this->SendFilter(proto, opaque, n->second); + FilterResult data = DecodeFilter(extdata); + this->AddFilter(data.freeform, data.action, data.reason, data.gline_time, data.GetFlags()); + } + catch (ModuleException& e) + { + ServerInstance->Logs->Log("m_filter", LOG_DEBUG, "Error when unserializing filter: " + std::string(e.GetReason())); } } +} - virtual void OnRehash(userrec* user, const std::string ¶meter) +ImplFilter::ImplFilter(ModuleFilter* mymodule, const std::string &rea, FilterAction act, long glinetime, const std::string &pat, const std::string &flgs) + : FilterResult(pat, rea, act, glinetime, flgs) +{ + if (!mymodule->RegexEngine) + throw ModuleException("Regex module implementing '"+mymodule->RegexEngine.GetProvider()+"' is not loaded!"); + regex = mymodule->RegexEngine->Create(pat); +} + +FilterResult* ModuleFilter::FilterMatch(User* user, const std::string &text, int flgs) +{ + static std::string stripped_text; + stripped_text.clear(); + + for (std::vector::iterator index = filters.begin(); index != filters.end(); index++) { - ConfigReader* MyConf = new ConfigReader(ServerInstance); + FilterResult* filter = dynamic_cast(&(*index)); + + /* Skip ones that dont apply to us */ + if (!AppliesToMe(user, filter, flgs)) + continue; - for (int index = 0; index < MyConf->Enumerate("keyword"); index++) + if ((filter->flag_strip_color) && (stripped_text.empty())) { - this->DeleteFilter(MyConf->ReadValue("keyword","pattern",index)); + stripped_text = text; + InspIRCd::StripColor(stripped_text); + } - 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); - long gline_time = ServerInstance->Duration(MyConf->ReadValue("keyword","duration",index).c_str()); - if (do_action == "") - do_action = "none"; - FilterResult* x = new FilterResult; - x->reason = reason; - x->action = do_action; - x->gline_time = gline_time; - x->freeform = pattern; - filters[pattern] = x; + //ServerInstance->Logs->Log("m_filter", LOG_DEBUG, "Match '%s' against '%s'", text.c_str(), index->freeform.c_str()); + if (index->regex->Matches(filter->flag_strip_color ? stripped_text : text)) + { + //ServerInstance->Logs->Log("m_filter", LOG_DEBUG, "MATCH"); + return &*index; } - DELETE(MyConf); + //ServerInstance->Logs->Log("m_filter", LOG_DEBUG, "NO MATCH"); } + return NULL; +} - virtual int OnStats(char symbol, userrec* user, string_list &results) +bool ModuleFilter::DeleteFilter(const std::string &freeform) +{ + for (std::vector::iterator i = filters.begin(); i != filters.end(); i++) { - if (symbol == 's') + if (i->freeform == freeform) { - 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->action+" "+ConvToStr(n->second->gline_time)+" :"+n->second->reason); - } + delete i->regex; + filters.erase(i); + return true; } - return 0; } -}; - -// stuff down here is the module-factory stuff. For basic modules you can ignore this. + return false; +} -class ModuleFilterFactory : public ModuleFactory +std::pair ModuleFilter::AddFilter(const std::string &freeform, FilterAction type, const std::string &reason, long duration, const std::string &flgs) { - public: - ModuleFilterFactory() + for (std::vector::iterator i = filters.begin(); i != filters.end(); i++) { + if (i->freeform == freeform) + { + return std::make_pair(false, "Filter already exists"); + } } - - ~ModuleFilterFactory() + + try { + filters.push_back(ImplFilter(this, reason, type, duration, freeform, flgs)); } - - virtual Module * CreateModule(InspIRCd* Me) + catch (ModuleException &e) { - return new ModuleFilter(Me); + ServerInstance->Logs->Log("m_filter", LOG_DEFAULT, "Error in regular expression '%s': %s", freeform.c_str(), e.GetReason()); + return std::make_pair(false, e.GetReason()); } - -}; + return std::make_pair(true, ""); +} + +bool ModuleFilter::StringToFilterAction(const std::string& str, FilterAction& fa) +{ + irc::string s(str.c_str()); + if (s == "gline") + fa = FA_GLINE; + else if (s == "block") + fa = FA_BLOCK; + else if (s == "silent") + fa = FA_SILENT; + else if (s == "kill") + fa = FA_KILL; + else if (s == "none") + fa = FA_NONE; + else + return false; -extern "C" void * init_module( void ) + return true; +} + +std::string ModuleFilter::FilterActionToString(FilterAction fa) { - return new ModuleFilterFactory; + switch (fa) + { + case FA_GLINE: return "gline"; + case FA_BLOCK: return "block"; + case FA_SILENT: return "silent"; + case FA_KILL: return "kill"; + default: return "none"; + } +} + +void ModuleFilter::ReadFilters() +{ + ConfigTagList tags = ServerInstance->Config->ConfTags("keyword"); + for (ConfigIter i = tags.first; i != tags.second; ++i) + { + std::string pattern = i->second->getString("pattern"); + this->DeleteFilter(pattern); + + std::string reason = i->second->getString("reason"); + std::string action = i->second->getString("action"); + std::string flgs = i->second->getString("flags"); + unsigned long gline_time = InspIRCd::Duration(i->second->getString("duration")); + if (flgs.empty()) + flgs = "*"; + + FilterAction fa; + if (!StringToFilterAction(action, fa)) + fa = FA_NONE; + + try + { + filters.push_back(ImplFilter(this, reason, fa, gline_time, pattern, flgs)); + ServerInstance->Logs->Log("m_filter", LOG_DEFAULT, "Regular expression %s loaded.", pattern.c_str()); + } + catch (ModuleException &e) + { + ServerInstance->Logs->Log("m_filter", LOG_DEFAULT, "Error in regular expression '%s': %s", pattern.c_str(), e.GetReason()); + } + } +} + +ModResult ModuleFilter::OnStats(char symbol, User* user, string_list &results) +{ + if (symbol == 's') + { + for (std::vector::iterator i = filters.begin(); i != filters.end(); i++) + { + results.push_back(ServerInstance->Config->ServerName+" 223 "+user->nick+" :"+RegexEngine.GetProvider()+":"+i->freeform+" "+i->GetFlags()+" "+FilterActionToString(i->action)+" "+ConvToStr(i->gline_time)+" :"+i->reason); + } + for (std::set::iterator i = exemptfromfilter.begin(); i != exemptfromfilter.end(); ++i) + { + results.push_back(ServerInstance->Config->ServerName+" 223 "+user->nick+" :EXEMPT "+(*i)); + } + } + return MOD_RES_PASSTHRU; +} + +void ModuleFilter::OnUnloadModule(Module* mod) +{ + // If the regex engine became unavailable or has changed, remove all filters + if (!RegexEngine) + { + FreeFilters(); + } + else if (RegexEngine.operator->() != factory) + { + factory = RegexEngine.operator->(); + FreeFilters(); + } } +MODULE_INIT(ModuleFilter)