151 lines
4.5 KiB
C++
151 lines
4.5 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/session_settings.hpp"
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#include "libtorrent/buffer.hpp"
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#include <vector>
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#include <boost/function.hpp>
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#include <boost/thread/mutex.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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udp_socket(io_service& ios, callback_t const& c, connection_queue& cc);
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bool is_open() const { return m_ipv4_sock.is_open() || m_ipv6_sock.is_open(); }
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io_service& get_io_service() { return m_ipv4_sock.get_io_service(); }
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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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#ifdef TORRENT_DEBUG
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~udp_socket()
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{
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TORRENT_ASSERT(m_magic == 0x1337);
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TORRENT_ASSERT(m_outstanding == 0);
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TORRENT_ASSERT(!m_callback);
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m_magic = 0;
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}
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#endif
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private:
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callback_t m_callback;
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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 wrap(udp::endpoint const& ep, 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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typedef boost::mutex mutex_t;
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mutable mutex_t m_mutex;
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udp::socket m_ipv4_sock;
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udp::socket m_ipv6_sock;
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udp::endpoint m_v4_ep;
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udp::endpoint m_v6_ep;
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char m_v4_buf[1600];
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char m_v6_buf[1600];
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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[100];
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bool m_tunnel_packets;
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udp::endpoint m_proxy_addr;
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#ifdef TORRENT_DEBUG
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int m_magic;
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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, 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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struct queued_packet
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{
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udp::endpoint ep;
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buffer buf;
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};
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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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bool m_abort;
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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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