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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* 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.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include <pcre.h>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "m_filter.h"
/* $ModDesc: m_filter with regexps */
/* $CompileFlags: exec("pcre-config --cflags") */
/* $LinkerFlags: exec("pcre-config --libs") rpath("pcre-config --libs") -lpcre */
/* $ModDep: m_filter.h */
#ifdef WINDOWS
#pragma comment(lib, "pcre.lib")
#endif
class PCREFilter : public FilterResult
{
public:
pcre* regexp;
PCREFilter(pcre* r, const std::string &rea, const std::string &act, long glinetime, const std::string &pat, const std::string &flgs)
: FilterResult(pat, rea, act, glinetime, flgs), regexp(r)
{
}
PCREFilter()
{
}
};
class ModuleFilterPCRE : public FilterBase
{
std::vector<PCREFilter> filters;
pcre *re;
const char *error;
int erroffset;
PCREFilter fr;
public:
ModuleFilterPCRE(InspIRCd* Me)
: FilterBase(Me, "m_filter_pcre.so")
{
OnRehash(NULL,"");
}
virtual ~ModuleFilterPCRE()
{
}
virtual FilterResult* FilterMatch(User* user, const std::string &text, int flgs)
{
for (std::vector<PCREFilter>::iterator index = filters.begin(); index != filters.end(); index++)
{
/* Skip ones that dont apply to us */
if (!FilterBase::AppliesToMe(user, dynamic_cast<FilterResult*>(&(*index)), flgs))
continue;
if (pcre_exec(index->regexp, NULL, text.c_str(), text.length(), 0, 0, NULL, 0) > -1)
{
fr = *index;
if (index != filters.begin())
{
filters.erase(index);
filters.insert(filters.begin(), fr);
}
return &fr;
}
}
return NULL;
}
virtual bool DeleteFilter(const std::string &freeform)
{
for (std::vector<PCREFilter>::iterator i = filters.begin(); i != filters.end(); i++)
{
if (i->freeform == freeform)
{
pcre_free((*i).regexp);
filters.erase(i);
return true;
}
}
return false;
}
virtual void SyncFilters(Module* proto, void* opaque)
{
for (std::vector<PCREFilter>::iterator i = filters.begin(); i != filters.end(); i++)
{
this->SendFilter(proto, opaque, &(*i));
}
}
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 (std::vector<PCREFilter>::iterator i = filters.begin(); i != filters.end(); i++)
{
if (i->freeform == freeform)
{
return std::make_pair(false, "Filter already exists");
}
}
re = pcre_compile(freeform.c_str(),0,&error,&erroffset,NULL);
if (!re)
{
ServerInstance->Logs->Log("m_filter_pcre", DEFAULT,"Error in regular expression: %s at offset %d: %s\n", freeform.c_str(), erroffset, error);
ServerInstance->Logs->Log("m_filter_pcre", DEFAULT,"Regular expression %s not loaded.", freeform.c_str());
return std::make_pair(false, "Error in regular expression at offset " + ConvToStr(erroffset) + ": "+error);
}
else
{
filters.push_back(PCREFilter(re, reason, type, duration, freeform, flgs));
return std::make_pair(true, "");
}
}
virtual void OnRehash(User* user, const std::string ¶meter)
{
ConfigReader MyConf(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 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 = "*";
re = pcre_compile(pattern.c_str(),0,&error,&erroffset,NULL);
if (!re)
{
ServerInstance->Logs->Log("CONFIG",DEFAULT,"Error in regular expression: %s at offset %d: %s\n", pattern.c_str(), erroffset, error);
ServerInstance->Logs->Log("CONFIG",DEFAULT,"Regular expression %s not loaded.", pattern.c_str());
}
else
{
filters.push_back(PCREFilter(re, reason, action, gline_time, pattern, flgs));
ServerInstance->Logs->Log("CONFIG",DEFAULT,"Regular expression %s loaded.", pattern.c_str());
}
}
FilterBase::OnRehash(user, parameter);
}
virtual int OnStats(char symbol, User* user, string_list &results)
{
if (symbol == 's')
{
std::string sn = ServerInstance->Config->ServerName;
for (std::vector<PCREFilter>::iterator i = filters.begin(); i != filters.end(); i++)
{
results.push_back(sn+" 223 "+user->nick+" :REGEXP:"+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+" :EXEMPT "+(*i));
}
}
return 0;
}
};
MODULE_INIT(ModuleFilterPCRE)
|
