1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
10 * Written by Craig Edwards, Craig McLure, and others.
11 * This program is free but copyrighted software; see
12 * the file COPYING for details.
14 * ---------------------------------------------------
17 // Message and notice filtering using regex patterns
18 // a module based on the original work done by Craig Edwards in 2003
19 // for the chatspike network.
30 /* $ModDesc: m_filter with regexps */
31 /* $CompileFlags: `pcre-config --cflags` */
32 /* $LinkerFlags: `pcre-config --libs` `perl extra/pcre_rpath.pl` -lpcre */
33 /* $ModDep: m_filter.h */
35 class PCREFilter : public FilterResult
40 PCREFilter(pcre* r, const std::string &rea, const std::string &act, long gline_time, const std::string &pat)
41 : FilterResult::FilterResult(pat, rea, act, gline_time), regexp(r)
46 class ModuleFilterPCRE : public FilterBase
48 std::vector<PCREFilter> filters;
54 ModuleFilterPCRE(InspIRCd* Me)
55 : FilterBase::FilterBase(Me, "m_filter_pcre.so")
60 virtual ~ModuleFilterPCRE()
64 virtual FilterResult* FilterMatch(const std::string &text)
66 for (unsigned int index = 0; index < filters.size(); index++)
68 PCREFilter& filt = filters[index];
70 if (pcre_exec(filt.regexp,NULL,text.c_str(),text.length(),0,0,NULL,0) > -1)
78 virtual bool DeleteFilter(const std::string &freeform)
80 for (std::vector<PCREFilter>::iterator i = filters.begin(); i != filters.end(); i++)
82 if (i->freeform == freeform)
84 pcre_free((*i).regexp);
92 virtual void SyncFilters(Module* proto, void* opaque)
94 for (std::vector<PCREFilter>::iterator i = filters.begin(); i != filters.end(); i++)
96 this->SendFilter(proto, opaque, &(*i));
100 virtual std::pair<bool, std::string> AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration)
102 for (std::vector<PCREFilter>::iterator i = filters.begin(); i != filters.end(); i++)
104 if (i->freeform == freeform)
106 return std::make_pair(false, "Filter already exists");
110 re = pcre_compile(freeform.c_str(),0,&error,&erroffset,NULL);
114 ServerInstance->Log(DEFAULT,"Error in regular expression: %s at offset %d: %s\n", freeform.c_str(), erroffset, error);
115 ServerInstance->Log(DEFAULT,"Regular expression %s not loaded.", freeform.c_str());
116 return std::make_pair(false, "Error in regular expression at offset " + ConvToStr(erroffset) + ": "+error);
120 filters.push_back(PCREFilter(re, reason, type, duration, freeform));
121 return std::make_pair(true, "");
125 virtual void OnRehash(const std::string ¶meter)
127 ConfigReader MyConf(ServerInstance);
129 for (int index = 0; index < MyConf.Enumerate("keyword"); index++)
131 this->DeleteFilter(MyConf.ReadValue("keyword", "pattern", index));
133 std::string pattern = MyConf.ReadValue("keyword", "pattern", index);
134 std::string reason = MyConf.ReadValue("keyword", "reason", index);
135 std::string action = MyConf.ReadValue("keyword", "action", index);
136 long gline_time = ServerInstance->Duration(MyConf.ReadValue("keyword", "duration", index).c_str());
138 re = pcre_compile(pattern.c_str(),0,&error,&erroffset,NULL);
142 ServerInstance->Log(DEFAULT,"Error in regular expression: %s at offset %d: %s\n", pattern.c_str(), erroffset, error);
143 ServerInstance->Log(DEFAULT,"Regular expression %s not loaded.", pattern.c_str());
147 filters.push_back(PCREFilter(re, reason, action, gline_time, pattern));
148 ServerInstance->Log(DEFAULT,"Regular expression %s loaded.", pattern.c_str());
153 virtual int OnStats(char symbol, userrec* user, string_list &results)
157 std::string sn = ServerInstance->Config->ServerName;
158 for (std::vector<PCREFilter>::iterator i = filters.begin(); i != filters.end(); i++)
160 results.push_back(sn+" 223 "+user->nick+" :REGEXP:"+i->freeform+" "+i->action+" "+ConvToStr(i->gline_time)+" :"+i->reason);
168 class ModuleFilterPCREFactory : public ModuleFactory
171 ModuleFilterPCREFactory()
175 ~ModuleFilterPCREFactory()
179 virtual Module * CreateModule(InspIRCd* Me)
181 return new ModuleFilterPCRE(Me);
187 extern "C" void * init_module( void )
189 return new ModuleFilterPCREFactory;