274 lines
6.7 KiB
C++
274 lines
6.7 KiB
C++
/*
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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/broadcast_socket.hpp"
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#include "libtorrent/http_connection.hpp"
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#include "libtorrent/connection_queue.hpp"
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#include "libtorrent/intrusive_ptr_base.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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#include <boost/thread/mutex.hpp>
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#include <boost/thread/condition.hpp>
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#include <set>
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#if (defined(TORRENT_LOGGING) || defined(TORRENT_VERBOSE_LOGGING)) && !defined (TORRENT_UPNP_LOGGING)
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#define TORRENT_UPNP_LOGGING
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#endif
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#if defined(TORRENT_UPNP_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: port-mapping index
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// int: external port
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// std::string: error message
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// an empty string as error means success
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typedef boost::function<void(int, int, std::string const&)> portmap_callback_t;
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class upnp : public intrusive_ptr_base<upnp>
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{
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public:
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upnp(io_service& ios, connection_queue& cc
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, address const& listen_interface, std::string const& user_agent
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, portmap_callback_t const& cb, bool ignore_nonrouters);
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~upnp();
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enum protocol_type { none = 0, udp = 1, tcp = 2 };
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int add_mapping(protocol_type p, int external_port, int local_port);
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void delete_mapping(int mapping_index);
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void discover_device();
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void close();
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std::string router_model()
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{
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mutex_t::scoped_lock l(m_mutex);
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return m_model;
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}
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private:
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void discover_device_impl();
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static address_v4 upnp_multicast_address;
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static udp::endpoint upnp_multicast_endpoint;
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enum { default_lease_time = 3600 };
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void resend_request(asio::error_code const& e);
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void on_reply(udp::endpoint const& from, char* buffer
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, std::size_t bytes_transferred);
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struct rootdevice;
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void next(rootdevice& d, int i);
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void update_map(rootdevice& d, int i);
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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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, int mapping);
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void on_upnp_unmap_response(asio::error_code const& e
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, libtorrent::http_parser const& p, rootdevice& d
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, int mapping);
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void on_expire(asio::error_code const& e);
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void disable(char const* msg);
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void return_error(int mapping, int code);
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void delete_port_mapping(rootdevice& d, int i);
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void create_port_mapping(http_connection& c, rootdevice& d, int i);
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void post(upnp::rootdevice const& d, std::string const& soap
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, std::string const& soap_action);
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int num_mappings() const { return int(m_mappings.size()); }
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struct global_mapping_t
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{
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global_mapping_t()
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: protocol(none)
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, external_port(0)
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, local_port(0)
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{}
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int protocol;
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int external_port;
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int local_port;
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};
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struct mapping_t
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{
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enum action_t { action_none, action_add, action_delete };
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mapping_t()
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: action(action_none)
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, local_port(0)
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, external_port(0)
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, protocol(none)
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, failcount(0)
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{}
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// the time the port mapping will expire
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ptime expires;
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int action;
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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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// 2 = udp, 1 = tcp
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int protocol;
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// the number of times this mapping has failed
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int failcount;
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};
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struct rootdevice
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{
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rootdevice(): service_namespace(0)
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, lease_duration(default_lease_time)
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, supports_specific_external(true)
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, disabled(false)
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{
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#ifndef NDEBUG
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magic = 1337;
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#endif
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}
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#ifndef NDEBUG
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~rootdevice()
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{
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TORRENT_ASSERT(magic == 1337);
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magic = 0;
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}
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#endif
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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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char const* service_namespace;
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std::vector<mapping_t> mapping;
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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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bool disabled;
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mutable boost::shared_ptr<http_connection> upnp_connection;
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#ifndef NDEBUG
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int magic;
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#endif
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void close() const
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{
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TORRENT_ASSERT(magic == 1337);
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if (!upnp_connection) return;
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upnp_connection->close();
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upnp_connection.reset();
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}
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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::vector<global_mapping_t> m_mappings;
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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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asio::io_service& m_io_service;
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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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broadcast_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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bool m_closing;
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bool m_ignore_outside_network;
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connection_queue& m_cc;
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typedef boost::mutex mutex_t;
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mutex_t m_mutex;
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std::string m_model;
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#ifdef TORRENT_UPNP_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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