230 lines
6.7 KiB
C++
230 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_UDP_SOCKET_HPP_INCLUDED
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#define TORRENT_UDP_SOCKET_HPP_INCLUDED
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#include "libtorrent/socket.hpp"
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#include "libtorrent/io_service.hpp"
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#include "libtorrent/error_code.hpp"
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#include "libtorrent/session_settings.hpp"
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#include "libtorrent/buffer.hpp"
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#include "libtorrent/thread.hpp"
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#include "libtorrent/deadline_timer.hpp"
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#include <list>
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#include <boost/function/function4.hpp>
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namespace libtorrent
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{
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class connection_queue;
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class udp_socket
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{
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public:
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typedef boost::function<void(error_code const& ec
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, udp::endpoint const&, char const* buf, int size)> callback_t;
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typedef boost::function<void(error_code const& ec
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, char const*, char const* buf, int size)> callback2_t;
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udp_socket(io_service& ios, callback_t const& c, callback2_t const& c2, connection_queue& cc);
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~udp_socket();
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bool is_open() const
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{
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return m_ipv4_sock.is_open()
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#if TORRENT_USE_IPV6
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|| m_ipv6_sock.is_open()
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#endif
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;
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}
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io_service& get_io_service() { return m_ipv4_sock.get_io_service(); }
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// this is only valid when using a socks5 proxy
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void send_hostname(char const* hostname, int port, char const* p, int len, error_code& ec);
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void send(udp::endpoint const& ep, char const* p, int len, error_code& ec);
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void bind(udp::endpoint const& ep, error_code& ec);
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void bind(int port);
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void close();
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int local_port() const { return m_bind_port; }
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void set_proxy_settings(proxy_settings const& ps);
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proxy_settings const& get_proxy_settings() { return m_proxy_settings; }
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bool is_closed() const { return m_abort; }
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tcp::endpoint local_endpoint(error_code& ec) const
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{
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udp::endpoint ep = m_ipv4_sock.local_endpoint(ec);
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return tcp::endpoint(ep.address(), ep.port());
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}
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void set_buf_size(int s);
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template <class SocketOption>
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void set_option(SocketOption const& opt, error_code& ec)
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{
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m_ipv4_sock.set_option(opt, ec);
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#if TORRENT_USE_IPV6
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m_ipv6_sock.set_option(opt, ec);
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#endif
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}
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template <class SocketOption>
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void get_option(SocketOption& opt, error_code& ec)
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{
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m_ipv4_sock.get_option(opt, ec);
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}
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udp::endpoint proxy_addr() const { return m_proxy_addr; }
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protected:
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struct queued_packet
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{
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udp::endpoint ep;
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char* hostname;
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buffer buf;
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};
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private:
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#if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING
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// necessary for logging member offsets
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public:
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#endif
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// callback for regular incoming packets
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callback_t m_callback;
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// callback for proxied incoming packets with a domain
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// name as source
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callback2_t m_callback2;
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void on_read(udp::socket* sock, error_code const& e, std::size_t bytes_transferred);
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void on_name_lookup(error_code const& e, tcp::resolver::iterator i);
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void on_timeout();
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void on_connect(int ticket);
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void on_connected(error_code const& ec);
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void handshake1(error_code const& e);
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void handshake2(error_code const& e);
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void handshake3(error_code const& e);
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void handshake4(error_code const& e);
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void socks_forward_udp();
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void connect1(error_code const& e);
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void connect2(error_code const& e);
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void hung_up(error_code const& e);
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void wrap(udp::endpoint const& ep, char const* p, int len, error_code& ec);
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void wrap(char const* hostname, int port, char const* p, int len, error_code& ec);
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void unwrap(error_code const& e, char const* buf, int size);
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void maybe_realloc_buffers();
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#ifdef TORRENT_DEBUG
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#if defined BOOST_HAS_PTHREADS
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mutable pthread_t m_thread;
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#endif
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bool is_single_thread() const
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{
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#if defined BOOST_HAS_PTHREADS
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if (m_thread == 0)
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m_thread = pthread_self();
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return m_thread == pthread_self();
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#endif
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return true;
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}
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#endif
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udp::socket m_ipv4_sock;
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udp::endpoint m_v4_ep;
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int m_v4_buf_size;
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char* m_v4_buf;
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#if TORRENT_USE_IPV6
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udp::socket m_ipv6_sock;
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udp::endpoint m_v6_ep;
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int m_v6_buf_size;
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char* m_v6_buf;
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#endif
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int m_bind_port;
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char m_outstanding;
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tcp::socket m_socks5_sock;
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int m_connection_ticket;
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proxy_settings m_proxy_settings;
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connection_queue& m_cc;
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tcp::resolver m_resolver;
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char m_tmp_buf[270];
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bool m_queue_packets;
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bool m_tunnel_packets;
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bool m_abort;
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// this is set to true to indicate that the m_v4_buf
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// and m_v6_buf should be reallocated to the size
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// of the buffer size members the next time their
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// read handler gets triggered
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bool m_reallocate_buffers;
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udp::endpoint m_proxy_addr;
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// while we're connecting to the proxy
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// we have to queue the packets, we'll flush
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// them once we're connected
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std::list<queued_packet> m_queue;
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#ifdef TORRENT_DEBUG
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bool m_started;
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int m_magic;
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int m_outstanding_when_aborted;
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#endif
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};
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struct rate_limited_udp_socket : public udp_socket
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{
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rate_limited_udp_socket(io_service& ios, callback_t const& c, callback2_t const& c2, connection_queue& cc);
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void set_rate_limit(int limit) { m_rate_limit = limit; }
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bool can_send() const { return int(m_queue.size()) >= m_queue_size_limit; }
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bool send(udp::endpoint const& ep, char const* p, int len, error_code& ec, int flags = 0);
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void close();
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private:
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void on_tick(error_code const& e);
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deadline_timer m_timer;
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int m_queue_size_limit;
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int m_rate_limit;
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int m_quota;
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ptime m_last_tick;
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std::list<queued_packet> m_queue;
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};
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}
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#endif
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