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trackedelement_workers.h
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trackedelement_workers.h
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/*
This file is part of Kismet
Kismet 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; either version 2 of the License, or
(at your option) any later version.
Kismet 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 Kismet; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __TRACKEDELEMENT_WORKERS__
#define __TRACKEDELEMENT_WORKERS__
#include "config.h"
#include <functional>
#include "kis_mutex.h"
#include "trackedelement.h"
#include "trackedcomponent.h"
#include "nlohmann/json.hpp"
#ifdef HAVE_LIBPCRE1
#include <pcre.h>
#endif
#ifdef HAVE_LIBPCRE2
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#endif
class tracker_element_worker {
public:
tracker_element_worker() {
mutex.set_name("tracker_element_worker");
matched = std::make_shared<tracker_element_vector>();
}
virtual ~tracker_element_worker() { }
// Match against a vector of elements; caller is responsible for ensuring this vector is protected
// and stable.
virtual std::shared_ptr<tracker_element_vector> do_work(std::shared_ptr<tracker_element_vector> v);
virtual std::shared_ptr<tracker_element_vector> get_matched_elements() {
return matched;
}
protected:
virtual bool match_element(std::shared_ptr<tracker_element> element) = 0;
virtual void set_matched_elements(std::shared_ptr<tracker_element_vector> elements);
kis_mutex mutex;
std::shared_ptr<tracker_element_vector> matched;
};
class tracker_element_function_worker : public tracker_element_worker {
public:
using filter_cb = std::function<bool (std::shared_ptr<tracker_element>)>;
tracker_element_function_worker(filter_cb cb) :
filter{cb} { }
tracker_element_function_worker(const tracker_element_function_worker& w) {
filter = w.filter;
matched = w.matched;
}
virtual ~tracker_element_function_worker() { }
virtual bool match_element(std::shared_ptr<tracker_element> element) override;
protected:
filter_cb filter;
};
class tracker_element_regex_worker : public tracker_element_worker {
public:
struct pcre_filter {
#if defined(HAVE_LIBPCRE1) || defined(HAVE_LIBPCRE2)
pcre_filter(const std::string& target, const std::string& in_regex);
~pcre_filter();
std::string target;
#if defined(HAVE_LIBPCRE1)
pcre *re;
pcre_extra *study;
#elif defined(HAVE_LIBPCRE2)
pcre2_code *re;
pcre2_match_data *match_data;
#endif
#endif
};
tracker_element_regex_worker(const std::vector<std::shared_ptr<tracker_element_regex_worker::pcre_filter>>& filter_vec);
tracker_element_regex_worker(nlohmann::json& json_pcre_vec);
tracker_element_regex_worker(const std::vector<std::pair<std::string, std::string>>& str_pcre_vec);
tracker_element_regex_worker(const tracker_element_regex_worker& w) {
filter_vec = w.filter_vec;
matched = w.matched;
}
virtual ~tracker_element_regex_worker() { }
virtual bool match_element(std::shared_ptr<tracker_element> element) override;
protected:
std::vector<std::shared_ptr<tracker_element_regex_worker::pcre_filter>> filter_vec;
};
class tracker_element_stringmatch_worker : public tracker_element_worker {
public:
tracker_element_stringmatch_worker(const std::string& in_query,
const std::vector<std::vector<int>>& in_paths);
tracker_element_stringmatch_worker(const tracker_element_stringmatch_worker& w) {
query = w.query;
fieldpaths = w.fieldpaths;
mac_query_term = w.mac_query_term;
mac_query_term_len = w.mac_query_term_len;
matched = w.matched;
}
virtual ~tracker_element_stringmatch_worker() { }
virtual bool match_element(std::shared_ptr<tracker_element> element) override;
protected:
std::string query;
std::vector<std::vector<int>> fieldpaths;
uint64_t mac_query_term;
unsigned int mac_query_term_len;
};
class tracker_element_icasestringmatch_worker : public tracker_element_worker {
public:
tracker_element_icasestringmatch_worker(const std::string& in_query,
const std::vector<std::vector<int>>& in_paths);
tracker_element_icasestringmatch_worker(const tracker_element_icasestringmatch_worker& w) {
query = w.query;
fieldpaths = w.fieldpaths;
mac_query_term = w.mac_query_term;
mac_query_term_len = w.mac_query_term_len;
matched = w.matched;
}
virtual ~tracker_element_icasestringmatch_worker() { }
virtual bool match_element(std::shared_ptr<tracker_element> element) override;
protected:
std::string query;
std::vector<std::vector<int>> fieldpaths;
uint64_t mac_query_term;
unsigned int mac_query_term_len;
};
#endif /* ifndef TRACKEDELEMENT_WORKERS */