109 lines
3.8 KiB
C++
109 lines
3.8 KiB
C++
/*
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Copyright (c) 2017, Arvid Norberg, Steven Siloti
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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_SESSION_UDP_SOCKETS_HPP_INCLUDED
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#define TORRENT_SESSION_UDP_SOCKETS_HPP_INCLUDED
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#include "libtorrent/utp_socket_manager.hpp"
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#include "libtorrent/config.hpp"
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#include "libtorrent/aux_/allocating_handler.hpp"
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#include <boost/asio/io_service.hpp>
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#include <vector>
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namespace libtorrent { namespace aux {
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struct listen_endpoint_t;
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struct proxy_settings;
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enum class transport : std::uint8_t { plaintext, ssl };
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struct session_udp_socket : utp_socket_interface
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{
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explicit session_udp_socket(io_service& ios)
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: sock(ios) {}
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udp::endpoint local_endpoint() override { return sock.local_endpoint(); }
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udp_socket sock;
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// since udp packets are expected to be dispatched frequently, this saves
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// time on handler allocation every time we read again.
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aux::handler_storage<TORRENT_READ_HANDLER_MAX_SIZE> udp_handler_storage;
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// this is true when the udp socket send() has failed with EAGAIN or
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// EWOULDBLOCK. i.e. we're currently waiting for the socket to become
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// writeable again. Once it is, we'll set it to false and notify the utp
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// socket manager
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bool write_blocked = false;
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};
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struct outgoing_udp_socket final : session_udp_socket
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{
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outgoing_udp_socket(io_service& ios, std::string const& dev, transport ssl_)
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: session_udp_socket(ios), device(dev), ssl(ssl_) {}
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// the name of the device the socket is bound to, may be empty
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// if the socket is not bound to a device
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std::string const device;
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// set to true if this is an SSL socket
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transport const ssl;
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};
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// sockets used for outgoing utp connections
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struct TORRENT_EXTRA_EXPORT outgoing_sockets
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{
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// partitions sockets based on whether they match one of the given endpoints
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// all matched sockets are ordered before unmatched sockets
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// matched endpoints are removed from the vector
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// returns an iterator to the first unmatched socket
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std::vector<std::shared_ptr<outgoing_udp_socket>>::iterator
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partition_outgoing_sockets(std::vector<listen_endpoint_t>& eps);
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tcp::endpoint bind(socket_type& s, address const& remote_address) const;
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void update_proxy(proxy_settings const& settings);
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// close all sockets
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void close();
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std::vector<std::shared_ptr<outgoing_udp_socket>> sockets;
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private:
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// round-robin index into sockets
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// one dimension for IPv4/IPv6 and a second for SSL/non-SSL
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mutable std::array<std::array<std::uint8_t, 2>, 2> index = {{ {{0, 0}}, {{0, 0}} }};
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};
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} }
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#endif
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