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class_filter.h
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class_filter.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
*/
#include "config.h"
#include "packetchain.h"
#include "packet.h"
#include "trackedcomponent.h"
#include "eventbus.h"
#include "kis_net_beast_httpd.h"
// Common class-based filter mechanism which can be used in multiple locations;
// implements basic default behavior and REST endpoints.
//
// Filters act on 'true' results: Default behavior of 'true' defaults to BLOCKING
// the action, behavior of 'false' defaults to PASSING actions.
class class_filter : public tracker_component {
public:
class_filter(const std::string& in_id, const std::string& in_description,
const std::string& in_type);
virtual ~class_filter() { }
__ProxyGet(filter_id, std::string, std::string, filter_id);
__ProxyGet(filter_description, std::string, std::string, filter_description);
__ProxyGet(filter_type, std::string, std::string, filter_type);
__Proxy(filter_default, uint8_t, bool, bool, filter_default);
// Filtering actions are custom per subclass
protected:
bool filterstring_to_bool(const std::string& str);
__ProxySet(filter_id, std::string, std::string, filter_id);
__ProxySet(filter_description, std::string, std::string, filter_description);
__ProxySet(filter_type, std::string, std::string, filter_type);
virtual void register_fields() override {
tracker_component::register_fields();
register_field("kismet.classfilter.id", "Filter ID/Endpoint", &filter_id);
register_field("kismet.classfilter.description", "Filter description", &filter_description);
register_field("kismet.classfilter.type", "Filter mechanism", &filter_type);
register_field("kismet.classfilter.default", "Default filter (pass/reject)", &filter_default);
}
kis_mutex mutex;
std::string base_uri;
std::shared_ptr<tracker_element_string> filter_id;
std::shared_ptr<tracker_element_string> filter_description;
std::shared_ptr<tracker_element_string> filter_type;
std::shared_ptr<tracker_element_uint8> filter_default;
// Default endpoint
void default_set_endp_handler(std::shared_ptr<kis_net_beast_httpd_connection> con);
// Build the return object; subfilters must implement this to bypass class hierarchy & call
// build_self_content
virtual std::shared_ptr<tracker_element_map> self_endp_handler() = 0;
// Cascading build
virtual void build_self_content(std::shared_ptr<tracker_element_map> content);
};
// MAC based filter
class class_filter_mac_addr : public class_filter {
public:
class_filter_mac_addr(const std::string& in_id, const std::string& in_descripton);
virtual ~class_filter_mac_addr();
virtual bool filter(mac_addr in_mac, unsigned int in_phy);
virtual void set_filter(mac_addr in_mac, const std::string& in_phy, bool value);
virtual void remove_filter(mac_addr in_mac, const std::string& in_phy);
protected:
std::shared_ptr<device_tracker> devicetracker;
std::shared_ptr<event_bus> eventbus;
unsigned long eb_id;
void update_phy_map(std::shared_ptr<eventbus_event> evt);
// Filters are stored in integer-indexed local form, but also a constructed tiered
// map for presentation out the rest interface:
// map[string, phy] -> map[mac, boolean].
virtual void register_fields() override {
class_filter::register_fields();
// Phy-based map
register_field("kismet.classfilter.macaddr.address_by_phy",
"MAC address filters", &filter_phy_block);
// Mac based map filter_sub_mac_id =
register_field("kismet.classfilter.macaddr.filter_block",
tracker_element_factory<tracker_element_macfilter_map>(),
"MAC address filters");
// Filter value
filter_sub_value_id =
register_field("kismet.classfilter.macaddr.value",
tracker_element_factory<tracker_element_uint8>(),
"Filter value");
}
std::shared_ptr<tracker_element_string_map> filter_phy_block;
// Nested phy types
int filter_sub_mac_id, filter_sub_value_id;
// Internal fast lookup tables per-phy we use for actual filtering
std::map<int, std::map<mac_addr, bool>> phy_mac_filter_map;
// Internal unknown phy map for filters registered before we had a phy ID
std::map<std::string, std::map<mac_addr, bool>> unknown_phy_mac_filter_map;
// Address management endpoint keyed on path
void edit_endp_handler(std::shared_ptr<kis_net_beast_httpd_connection> con);
void remove_endp_handler(std::shared_ptr<kis_net_beast_httpd_connection> con);
virtual std::shared_ptr<tracker_element_map> self_endp_handler() override;
virtual void build_self_content(std::shared_ptr<tracker_element_map> content) override;
};