162 lines
4.5 KiB
C++
162 lines
4.5 KiB
C++
/*
|
|
|
|
Copyright (c) 2007-2016, Arvid Norberg
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef TORRENT_NATPMP_HPP
|
|
#define TORRENT_NATPMP_HPP
|
|
|
|
#include "libtorrent/io_service_fwd.hpp"
|
|
#include "libtorrent/socket.hpp"
|
|
#include "libtorrent/address.hpp"
|
|
#include "libtorrent/error_code.hpp"
|
|
#include "libtorrent/deadline_timer.hpp"
|
|
#include "libtorrent/time.hpp"
|
|
#include "libtorrent/debug.hpp"
|
|
#include "libtorrent/aux_/portmap.hpp"
|
|
#include "libtorrent/aux_/vector.hpp"
|
|
|
|
namespace libtorrent {
|
|
|
|
struct TORRENT_EXTRA_EXPORT natpmp
|
|
: std::enable_shared_from_this<natpmp>
|
|
, single_threaded
|
|
{
|
|
natpmp(io_service& ios, aux::portmap_callback& cb);
|
|
|
|
void start();
|
|
|
|
// maps the ports, if a port is set to 0
|
|
// it will not be mapped
|
|
int add_mapping(aux::portmap_protocol p, int external_port, int local_port);
|
|
void delete_mapping(int mapping_index);
|
|
bool get_mapping(int mapping_index, int& local_port, int& external_port
|
|
, aux::portmap_protocol& protocol) const;
|
|
|
|
void close();
|
|
|
|
private:
|
|
|
|
std::shared_ptr<natpmp> self() { return shared_from_this(); }
|
|
|
|
void update_mapping(int i);
|
|
void send_map_request(int i);
|
|
void send_get_ip_address_request();
|
|
void resend_request(int i, error_code const& e);
|
|
void on_reply(error_code const& e
|
|
, std::size_t bytes_transferred);
|
|
void try_next_mapping(int i);
|
|
void update_expiration_timer();
|
|
void mapping_expired(error_code const& e, int i);
|
|
void close_impl();
|
|
|
|
#ifndef TORRENT_DISABLE_LOGGING
|
|
bool should_log() const;
|
|
void log(char const* fmt, ...) const TORRENT_FORMAT(2, 3);
|
|
#endif
|
|
|
|
void disable(error_code const& ec);
|
|
|
|
struct mapping_t
|
|
{
|
|
enum class action : std::uint8_t { none, add, del };
|
|
|
|
// indicates that the mapping has changed
|
|
// and needs an update
|
|
action act = action::none;
|
|
|
|
// the time the port mapping will expire
|
|
time_point expires;
|
|
|
|
// the local port for this mapping. If this is set
|
|
// to 0, the mapping is not in use
|
|
int local_port = 0;
|
|
|
|
// the external (on the NAT router) port
|
|
// for the mapping. This is the port we
|
|
// should announce to others
|
|
int external_port = 0;
|
|
|
|
aux::portmap_protocol protocol = aux::portmap_protocol::none;
|
|
|
|
// set to true when the first map request is sent
|
|
bool map_sent = false;
|
|
|
|
// set to true while we're waiting for a response
|
|
bool outstanding_request = false;
|
|
};
|
|
|
|
aux::portmap_callback& m_callback;
|
|
|
|
aux::vector<mapping_t> m_mappings;
|
|
|
|
// the endpoint to the nat router
|
|
udp::endpoint m_nat_endpoint;
|
|
|
|
// this is the mapping that is currently
|
|
// being updated. It is -1 in case no
|
|
// mapping is being updated at the moment
|
|
int m_currently_mapping = -1;
|
|
|
|
// current retry count
|
|
int m_retry_count = 0;
|
|
|
|
// used to receive responses in
|
|
char m_response_buffer[16];
|
|
|
|
// router external IP address
|
|
address m_external_ip;
|
|
|
|
// the endpoint we received the message from
|
|
udp::endpoint m_remote;
|
|
|
|
// the udp socket used to communicate
|
|
// with the NAT router
|
|
udp::socket m_socket;
|
|
|
|
// used to resend udp packets in case
|
|
// they time out
|
|
deadline_timer m_send_timer;
|
|
|
|
// timer used to refresh mappings
|
|
deadline_timer m_refresh_timer;
|
|
|
|
// the mapping index that will expire next
|
|
int m_next_refresh = -1;
|
|
|
|
bool m_disabled = false;
|
|
|
|
bool m_abort = false;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|