308 lines
8.3 KiB
C++
308 lines
8.3 KiB
C++
/*
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Copyright (c) 2003-2012, 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_TRACKER_MANAGER_HPP_INCLUDED
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#define TORRENT_TRACKER_MANAGER_HPP_INCLUDED
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#include <vector>
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#include <string>
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#include <utility>
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#include <ctime>
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#ifdef _MSC_VER
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#pragma warning(push, 1)
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#endif
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#include <boost/shared_ptr.hpp>
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#include <boost/cstdint.hpp>
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#include <boost/weak_ptr.hpp>
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#include <boost/intrusive_ptr.hpp>
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#include <boost/tuple/tuple.hpp>
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#include "libtorrent/config.hpp"
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#include "libtorrent/socket.hpp"
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#include "libtorrent/address.hpp"
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#include "libtorrent/peer_id.hpp"
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#include "libtorrent/peer.hpp" // peer_entry
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#include "libtorrent/session_settings.hpp" // proxy_settings
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#include "libtorrent/deadline_timer.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 "libtorrent/size_type.hpp"
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#include "libtorrent/union_endpoint.hpp"
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#include "libtorrent/udp_socket.hpp" // for udp_socket_observer
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#ifdef TORRENT_USE_OPENSSL
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#include <boost/asio/ssl/context.hpp>
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#endif
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namespace libtorrent
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{
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struct request_callback;
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class tracker_manager;
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struct timeout_handler;
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struct tracker_connection;
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namespace aux { struct session_impl; }
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// returns -1 if gzip header is invalid or the header size in bytes
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TORRENT_EXTRA_EXPORT int gzip_header(const char* buf, int size);
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struct TORRENT_EXTRA_EXPORT tracker_request
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{
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tracker_request()
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: kind(announce_request)
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, downloaded(-1)
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, uploaded(-1)
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, left(-1)
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, corrupt(0)
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, redundant(0)
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, listen_port(0)
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, event(none)
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, key(0)
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, num_want(0)
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, send_stats(true)
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, apply_ip_filter(true)
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#ifdef TORRENT_USE_OPENSSL
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, ssl_ctx(0)
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#endif
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{}
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enum
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{
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announce_request,
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scrape_request
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} kind;
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enum event_t
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{
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none,
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completed,
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started,
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stopped,
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paused
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};
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sha1_hash info_hash;
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peer_id pid;
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size_type downloaded;
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size_type uploaded;
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size_type left;
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size_type corrupt;
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size_type redundant;
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unsigned short listen_port;
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event_t event;
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std::string url;
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std::string trackerid;
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boost::uint32_t key;
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int num_want;
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address bind_ip;
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bool send_stats;
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bool apply_ip_filter;
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#ifdef TORRENT_USE_OPENSSL
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boost::asio::ssl::context* ssl_ctx;
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#endif
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};
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struct TORRENT_EXTRA_EXPORT request_callback
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{
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friend class tracker_manager;
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request_callback(): m_manager(0) {}
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virtual ~request_callback() {}
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virtual void tracker_warning(tracker_request const& req
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, std::string const& msg) = 0;
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virtual void tracker_scrape_response(tracker_request const& /*req*/
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, int /*complete*/, int /*incomplete*/, int /*downloads*/
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, int /*downloaders*/) {}
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virtual void tracker_response(
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tracker_request const& req
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, address const& tracker_ip
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, std::list<address> const& ip_list
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, std::vector<peer_entry>& peers
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, int interval
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, int min_interval
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, int complete
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, int incomplete
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, int downloaded
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, address const& external_ip
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, std::string const& trackerid) = 0;
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virtual void tracker_request_error(
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tracker_request const& req
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, int response_code
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, error_code const& ec
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, const std::string& msg
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, int retry_interval) = 0;
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union_endpoint m_tracker_address;
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#if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING
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virtual void debug_log(const char* fmt, ...) const = 0;
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#else
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private:
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#endif
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tracker_manager* m_manager;
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};
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struct TORRENT_EXTRA_EXPORT timeout_handler
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: intrusive_ptr_base<timeout_handler>
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, boost::noncopyable
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{
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timeout_handler(io_service& str);
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void set_timeout(int completion_timeout, int read_timeout);
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void restart_read_timeout();
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void cancel();
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bool cancelled() const { return m_abort; }
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virtual void on_timeout(error_code const& ec) = 0;
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virtual ~timeout_handler() {}
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io_service& get_io_service() { return m_timeout.get_io_service(); }
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private:
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void timeout_callback(error_code const&);
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boost::intrusive_ptr<timeout_handler> self()
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{ return boost::intrusive_ptr<timeout_handler>(this); }
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// used for timeouts
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// this is set when the request has been sent
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ptime m_start_time;
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// this is set every time something is received
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ptime m_read_time;
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// the asio async operation
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deadline_timer m_timeout;
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int m_completion_timeout;
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int m_read_timeout;
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typedef mutex mutex_t;
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mutable mutex_t m_mutex;
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bool m_abort;
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};
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struct TORRENT_EXTRA_EXPORT tracker_connection
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: timeout_handler
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{
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tracker_connection(tracker_manager& man
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, tracker_request const& req
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, io_service& ios
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, boost::weak_ptr<request_callback> r);
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boost::shared_ptr<request_callback> requester() const;
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virtual ~tracker_connection() {}
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tracker_request const& tracker_req() const { return m_req; }
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void fail(error_code const& ec, int code = -1, char const* msg = ""
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, int interval = 0, int min_interval = 0);
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virtual void start() = 0;
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virtual void close();
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address const& bind_interface() const { return m_req.bind_ip; }
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void sent_bytes(int bytes);
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void received_bytes(int bytes);
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virtual bool on_receive(error_code const& ec, udp::endpoint const& ep
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, char const* buf, int size) { return false; }
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virtual bool on_receive_hostname(error_code const& ec, char const* hostname
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, char const* buf, int size) { return false; }
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boost::intrusive_ptr<tracker_connection> self()
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{ return boost::intrusive_ptr<tracker_connection>(this); }
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protected:
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void fail_impl(error_code const& ec, int code = -1, std::string msg = std::string()
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, int interval = 0, int min_interval = 0);
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boost::weak_ptr<request_callback> m_requester;
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tracker_manager& m_man;
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private:
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const tracker_request m_req;
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};
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class TORRENT_EXTRA_EXPORT tracker_manager: public udp_socket_observer, boost::noncopyable
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{
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public:
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tracker_manager(aux::session_impl& ses, proxy_settings const& ps)
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: m_ses(ses)
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, m_proxy(ps)
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, m_abort(false) {}
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~tracker_manager();
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void queue_request(
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io_service& ios
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, connection_queue& cc
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, tracker_request r
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, std::string const& auth
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, boost::weak_ptr<request_callback> c
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= boost::weak_ptr<request_callback>());
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void abort_all_requests(bool all = false);
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void remove_request(tracker_connection const*);
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bool empty() const;
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int num_requests() const;
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void sent_bytes(int bytes);
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void received_bytes(int bytes);
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virtual bool incoming_packet(error_code const& e, udp::endpoint const& ep
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, char const* buf, int size);
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// this is only used for SOCKS packets, since
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// they may be addressed to hostname
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virtual bool incoming_packet(error_code const& e, char const* hostname
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, char const* buf, int size);
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private:
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typedef mutex mutex_t;
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mutable mutex_t m_mutex;
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typedef std::list<boost::intrusive_ptr<tracker_connection> >
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tracker_connections_t;
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tracker_connections_t m_connections;
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aux::session_impl& m_ses;
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proxy_settings const& m_proxy;
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bool m_abort;
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};
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}
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#endif // TORRENT_TRACKER_MANAGER_HPP_INCLUDED
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