202 lines
5.3 KiB
C++
202 lines
5.3 KiB
C++
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/*
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Copyright (c) 2007, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_UPNP_HPP
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#define TORRENT_UPNP_HPP
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#include "libtorrent/socket.hpp"
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#include "libtorrent/http_connection.hpp"
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#include <boost/date_time/posix_time/ptime.hpp>
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#include <boost/function.hpp>
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#include <boost/noncopyable.hpp>
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#include <boost/shared_ptr.hpp>
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#if defined(TORRENT_LOGGING) || defined(TORRENT_VERBOSE_LOGGING)
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#include <fstream>
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#endif
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namespace libtorrent
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{
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// int: external tcp port
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// int: external udp port
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// std::string: error message
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typedef boost::function<void(int, int, std::string const&)> portmap_callback_t;
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class upnp : boost::noncopyable
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{
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public:
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upnp(io_service& ios, address const& listen_interface
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, std::string const& user_agent, portmap_callback_t const& cb);
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void rebind(address const& listen_interface);
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// maps the ports, if a port is set to 0
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// it will not be mapped
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void set_mappings(int tcp, int udp);
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void close();
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private:
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void update_mapping(int i, int port);
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void resend_request(asio::error_code const& e);
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void on_reply(asio::error_code const& e
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, std::size_t bytes_transferred);
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void discover_device();
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struct rootdevice;
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void on_upnp_xml(asio::error_code const& e
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, libtorrent::http_parser const& p, rootdevice& d);
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void on_upnp_map_response(asio::error_code const& e
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, libtorrent::http_parser const& p, rootdevice& d);
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/*
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void send_map_request(int i);
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void try_next_mapping(int i);
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void update_expiration_timer();
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void refresh_mapping(int i);
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void mapping_expired(asio::error_code const& e, int i);
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*/
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void post(rootdevice& d, std::stringstream const& s
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, std::string const& soap_action);
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void map_port(rootdevice& d, int i);
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struct mapping_t
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{
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mapping_t()
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: need_update(false)
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, local_port(0)
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, external_port(0)
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, protocol(1)
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{}
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// indicates that the mapping has changed
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// and needs an update
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bool need_update;
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// the time the port mapping will expire
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boost::posix_time::ptime expires;
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// the local port for this mapping. If this is set
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// to 0, the mapping is not in use
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int local_port;
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// the external (on the NAT router) port
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// for the mapping. This is the port we
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// should announce to others
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int external_port;
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// 1 = udp, 0 = tcp
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int protocol;
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};
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struct rootdevice
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{
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rootdevice(): ports_mapped(false), lease_duration(3600)
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, supports_specific_external(true) {}
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// the interface url, through which the list of
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// supported interfaces are fetched
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std::string url;
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// the url to the WANIP or WANPPP interface
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std::string control_url;
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// either the WANIP namespace or the WANPPP namespace
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std::string service_namespace;
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mapping_t mapping[2];
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// true if we already mapped the ports on this device
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bool ports_mapped;
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std::string hostname;
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int port;
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std::string path;
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int lease_duration;
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// true if the device supports specifying a
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// specific external port, false if it doesn't
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bool supports_specific_external;
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boost::shared_ptr<http_connection> upnp_connection;
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void close() const { if (upnp_connection) upnp_connection->close(); }
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bool operator<(rootdevice const& rhs) const
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{ return url < rhs.url; }
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};
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std::string const& m_user_agent;
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// the set of devices we've found
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std::set<rootdevice> m_devices;
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portmap_callback_t m_callback;
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// current retry count
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int m_retry_count;
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// used to receive responses in
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char m_receive_buffer[1024];
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// the endpoint we received the message from
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udp::endpoint m_remote;
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// the local address we're listening on
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address_v4 m_local_ip;
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// the udp socket used to send and receive
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// multicast messages on the network
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datagram_socket m_socket;
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// used to resend udp packets in case
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// they time out
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deadline_timer m_broadcast_timer;
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// timer used to refresh mappings
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deadline_timer m_refresh_timer;
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bool m_disabled;
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#if defined(TORRENT_LOGGING) || defined(TORRENT_VERBOSE_LOGGING)
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std::ofstream m_log;
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#endif
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};
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}
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#endif
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