636 lines
21 KiB
C++
636 lines
21 KiB
C++
//
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// detail/reactive_socket_service.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
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#define ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if !defined(ASIO_HAS_IOCP) \
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&& !defined(ASIO_HAS_IO_URING_AS_DEFAULT)
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#include "asio/buffer.hpp"
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#include "asio/error.hpp"
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#include "asio/execution_context.hpp"
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#include "asio/socket_base.hpp"
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#include "asio/detail/buffer_sequence_adapter.hpp"
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#include "asio/detail/memory.hpp"
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#include "asio/detail/noncopyable.hpp"
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#include "asio/detail/reactive_null_buffers_op.hpp"
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#include "asio/detail/reactive_socket_accept_op.hpp"
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#include "asio/detail/reactive_socket_connect_op.hpp"
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#include "asio/detail/reactive_socket_recvfrom_op.hpp"
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#include "asio/detail/reactive_socket_sendto_op.hpp"
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#include "asio/detail/reactive_socket_service_base.hpp"
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#include "asio/detail/reactor.hpp"
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#include "asio/detail/reactor_op.hpp"
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#include "asio/detail/socket_holder.hpp"
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#include "asio/detail/socket_ops.hpp"
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#include "asio/detail/socket_types.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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template <typename Protocol>
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class reactive_socket_service :
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public execution_context_service_base<reactive_socket_service<Protocol> >,
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public reactive_socket_service_base
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{
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public:
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// The protocol type.
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typedef Protocol protocol_type;
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// The endpoint type.
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typedef typename Protocol::endpoint endpoint_type;
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// The native type of a socket.
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typedef socket_type native_handle_type;
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// The implementation type of the socket.
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struct implementation_type :
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reactive_socket_service_base::base_implementation_type
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{
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// Default constructor.
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implementation_type()
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: protocol_(endpoint_type().protocol())
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{
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}
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// The protocol associated with the socket.
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protocol_type protocol_;
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};
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// Constructor.
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reactive_socket_service(execution_context& context)
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: execution_context_service_base<
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reactive_socket_service<Protocol> >(context),
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reactive_socket_service_base(context)
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{
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}
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// Destroy all user-defined handler objects owned by the service.
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void shutdown()
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{
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this->base_shutdown();
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}
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// Move-construct a new socket implementation.
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void move_construct(implementation_type& impl,
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implementation_type& other_impl) ASIO_NOEXCEPT
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{
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this->base_move_construct(impl, other_impl);
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impl.protocol_ = other_impl.protocol_;
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other_impl.protocol_ = endpoint_type().protocol();
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}
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// Move-assign from another socket implementation.
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void move_assign(implementation_type& impl,
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reactive_socket_service_base& other_service,
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implementation_type& other_impl)
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{
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this->base_move_assign(impl, other_service, other_impl);
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impl.protocol_ = other_impl.protocol_;
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other_impl.protocol_ = endpoint_type().protocol();
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}
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// Move-construct a new socket implementation from another protocol type.
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template <typename Protocol1>
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void converting_move_construct(implementation_type& impl,
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reactive_socket_service<Protocol1>&,
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typename reactive_socket_service<
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Protocol1>::implementation_type& other_impl)
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{
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this->base_move_construct(impl, other_impl);
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impl.protocol_ = protocol_type(other_impl.protocol_);
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other_impl.protocol_ = typename Protocol1::endpoint().protocol();
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}
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// Open a new socket implementation.
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asio::error_code open(implementation_type& impl,
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const protocol_type& protocol, asio::error_code& ec)
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{
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if (!do_open(impl, protocol.family(),
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protocol.type(), protocol.protocol(), ec))
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impl.protocol_ = protocol;
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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// Assign a native socket to a socket implementation.
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asio::error_code assign(implementation_type& impl,
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const protocol_type& protocol, const native_handle_type& native_socket,
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asio::error_code& ec)
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{
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if (!do_assign(impl, protocol.type(), native_socket, ec))
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impl.protocol_ = protocol;
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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// Get the native socket representation.
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native_handle_type native_handle(implementation_type& impl)
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{
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return impl.socket_;
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}
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// Bind the socket to the specified local endpoint.
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asio::error_code bind(implementation_type& impl,
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const endpoint_type& endpoint, asio::error_code& ec)
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{
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socket_ops::bind(impl.socket_, endpoint.data(), endpoint.size(), ec);
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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// Set a socket option.
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template <typename Option>
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asio::error_code set_option(implementation_type& impl,
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const Option& option, asio::error_code& ec)
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{
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socket_ops::setsockopt(impl.socket_, impl.state_,
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option.level(impl.protocol_), option.name(impl.protocol_),
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option.data(impl.protocol_), option.size(impl.protocol_), ec);
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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// Set a socket option.
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template <typename Option>
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asio::error_code get_option(const implementation_type& impl,
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Option& option, asio::error_code& ec) const
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{
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std::size_t size = option.size(impl.protocol_);
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socket_ops::getsockopt(impl.socket_, impl.state_,
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option.level(impl.protocol_), option.name(impl.protocol_),
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option.data(impl.protocol_), &size, ec);
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if (!ec)
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option.resize(impl.protocol_, size);
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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// Get the local endpoint.
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endpoint_type local_endpoint(const implementation_type& impl,
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asio::error_code& ec) const
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{
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endpoint_type endpoint;
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std::size_t addr_len = endpoint.capacity();
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if (socket_ops::getsockname(impl.socket_, endpoint.data(), &addr_len, ec))
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{
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ASIO_ERROR_LOCATION(ec);
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return endpoint_type();
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}
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endpoint.resize(addr_len);
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return endpoint;
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}
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// Get the remote endpoint.
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endpoint_type remote_endpoint(const implementation_type& impl,
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asio::error_code& ec) const
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{
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endpoint_type endpoint;
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std::size_t addr_len = endpoint.capacity();
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if (socket_ops::getpeername(impl.socket_,
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endpoint.data(), &addr_len, false, ec))
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{
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ASIO_ERROR_LOCATION(ec);
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return endpoint_type();
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}
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endpoint.resize(addr_len);
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return endpoint;
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}
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// Disable sends or receives on the socket.
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asio::error_code shutdown(base_implementation_type& impl,
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socket_base::shutdown_type what, asio::error_code& ec)
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{
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socket_ops::shutdown(impl.socket_, what, ec);
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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// Send a datagram to the specified endpoint. Returns the number of bytes
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// sent.
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template <typename ConstBufferSequence>
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size_t send_to(implementation_type& impl, const ConstBufferSequence& buffers,
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const endpoint_type& destination, socket_base::message_flags flags,
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asio::error_code& ec)
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{
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typedef buffer_sequence_adapter<asio::const_buffer,
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ConstBufferSequence> bufs_type;
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size_t n;
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if (bufs_type::is_single_buffer)
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{
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n = socket_ops::sync_sendto1(impl.socket_, impl.state_,
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bufs_type::first(buffers).data(),
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bufs_type::first(buffers).size(), flags,
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destination.data(), destination.size(), ec);
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}
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else
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{
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bufs_type bufs(buffers);
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n = socket_ops::sync_sendto(impl.socket_, impl.state_,
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bufs.buffers(), bufs.count(), flags,
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destination.data(), destination.size(), ec);
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}
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ASIO_ERROR_LOCATION(ec);
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return n;
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}
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// Wait until data can be sent without blocking.
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size_t send_to(implementation_type& impl, const null_buffers&,
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const endpoint_type&, socket_base::message_flags,
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asio::error_code& ec)
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{
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// Wait for socket to become ready.
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socket_ops::poll_write(impl.socket_, impl.state_, -1, ec);
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ASIO_ERROR_LOCATION(ec);
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return 0;
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}
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// Start an asynchronous send. The data being sent must be valid for the
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// lifetime of the asynchronous operation.
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template <typename ConstBufferSequence, typename Handler, typename IoExecutor>
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void async_send_to(implementation_type& impl,
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const ConstBufferSequence& buffers,
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const endpoint_type& destination, socket_base::message_flags flags,
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Handler& handler, const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef reactive_socket_sendto_op<ConstBufferSequence,
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endpoint_type, Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(success_ec_, impl.socket_,
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buffers, destination, flags, handler, io_ex);
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<reactor_op_cancellation>(
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&reactor_, &impl.reactor_data_, impl.socket_, reactor::write_op);
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}
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ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
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&impl, impl.socket_, "async_send_to"));
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start_op(impl, reactor::write_op, p.p,
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is_continuation, true, false, &io_ex, 0);
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p.v = p.p = 0;
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}
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// Start an asynchronous wait until data can be sent without blocking.
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template <typename Handler, typename IoExecutor>
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void async_send_to(implementation_type& impl, const null_buffers&,
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const endpoint_type&, socket_base::message_flags,
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Handler& handler, const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef reactive_null_buffers_op<Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(success_ec_, handler, io_ex);
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<reactor_op_cancellation>(
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&reactor_, &impl.reactor_data_, impl.socket_, reactor::write_op);
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}
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ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
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&impl, impl.socket_, "async_send_to(null_buffers)"));
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start_op(impl, reactor::write_op, p.p,
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is_continuation, false, false, &io_ex, 0);
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p.v = p.p = 0;
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}
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// Receive a datagram with the endpoint of the sender. Returns the number of
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// bytes received.
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template <typename MutableBufferSequence>
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size_t receive_from(implementation_type& impl,
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const MutableBufferSequence& buffers,
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endpoint_type& sender_endpoint, socket_base::message_flags flags,
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asio::error_code& ec)
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{
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typedef buffer_sequence_adapter<asio::mutable_buffer,
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MutableBufferSequence> bufs_type;
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std::size_t addr_len = sender_endpoint.capacity();
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std::size_t n;
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if (bufs_type::is_single_buffer)
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{
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n = socket_ops::sync_recvfrom1(impl.socket_, impl.state_,
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bufs_type::first(buffers).data(), bufs_type::first(buffers).size(),
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flags, sender_endpoint.data(), &addr_len, ec);
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}
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else
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{
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bufs_type bufs(buffers);
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n = socket_ops::sync_recvfrom(impl.socket_, impl.state_, bufs.buffers(),
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bufs.count(), flags, sender_endpoint.data(), &addr_len, ec);
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}
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if (!ec)
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sender_endpoint.resize(addr_len);
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ASIO_ERROR_LOCATION(ec);
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return n;
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}
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// Wait until data can be received without blocking.
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size_t receive_from(implementation_type& impl, const null_buffers&,
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endpoint_type& sender_endpoint, socket_base::message_flags,
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asio::error_code& ec)
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{
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// Wait for socket to become ready.
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socket_ops::poll_read(impl.socket_, impl.state_, -1, ec);
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// Reset endpoint since it can be given no sensible value at this time.
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sender_endpoint = endpoint_type();
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ASIO_ERROR_LOCATION(ec);
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return 0;
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}
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// Start an asynchronous receive. The buffer for the data being received and
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// the sender_endpoint object must both be valid for the lifetime of the
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// asynchronous operation.
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template <typename MutableBufferSequence,
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typename Handler, typename IoExecutor>
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void async_receive_from(implementation_type& impl,
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const MutableBufferSequence& buffers, endpoint_type& sender_endpoint,
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socket_base::message_flags flags, Handler& handler,
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const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef reactive_socket_recvfrom_op<MutableBufferSequence,
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endpoint_type, Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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int protocol = impl.protocol_.type();
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p.p = new (p.v) op(success_ec_, impl.socket_, protocol,
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buffers, sender_endpoint, flags, handler, io_ex);
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<reactor_op_cancellation>(
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&reactor_, &impl.reactor_data_, impl.socket_, reactor::read_op);
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}
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ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
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&impl, impl.socket_, "async_receive_from"));
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start_op(impl,
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(flags & socket_base::message_out_of_band)
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? reactor::except_op : reactor::read_op,
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p.p, is_continuation, true, false, &io_ex, 0);
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p.v = p.p = 0;
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}
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// Wait until data can be received without blocking.
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template <typename Handler, typename IoExecutor>
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void async_receive_from(implementation_type& impl, const null_buffers&,
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endpoint_type& sender_endpoint, socket_base::message_flags flags,
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Handler& handler, const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef reactive_null_buffers_op<Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(success_ec_, handler, io_ex);
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<reactor_op_cancellation>(
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&reactor_, &impl.reactor_data_, impl.socket_, reactor::read_op);
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}
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ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
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&impl, impl.socket_, "async_receive_from(null_buffers)"));
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// Reset endpoint since it can be given no sensible value at this time.
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sender_endpoint = endpoint_type();
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start_op(impl,
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(flags & socket_base::message_out_of_band)
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? reactor::except_op : reactor::read_op,
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p.p, is_continuation, false, false, &io_ex, 0);
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p.v = p.p = 0;
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}
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// Accept a new connection.
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template <typename Socket>
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asio::error_code accept(implementation_type& impl,
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Socket& peer, endpoint_type* peer_endpoint, asio::error_code& ec)
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{
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// We cannot accept a socket that is already open.
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if (peer.is_open())
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{
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ec = asio::error::already_open;
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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std::size_t addr_len = peer_endpoint ? peer_endpoint->capacity() : 0;
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socket_holder new_socket(socket_ops::sync_accept(impl.socket_,
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impl.state_, peer_endpoint ? peer_endpoint->data() : 0,
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peer_endpoint ? &addr_len : 0, ec));
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// On success, assign new connection to peer socket object.
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if (new_socket.get() != invalid_socket)
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{
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if (peer_endpoint)
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peer_endpoint->resize(addr_len);
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peer.assign(impl.protocol_, new_socket.get(), ec);
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if (!ec)
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new_socket.release();
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}
|
|
|
|
ASIO_ERROR_LOCATION(ec);
|
|
return ec;
|
|
}
|
|
|
|
// Start an asynchronous accept. The peer and peer_endpoint objects must be
|
|
// valid until the accept's handler is invoked.
|
|
template <typename Socket, typename Handler, typename IoExecutor>
|
|
void async_accept(implementation_type& impl, Socket& peer,
|
|
endpoint_type* peer_endpoint, Handler& handler, const IoExecutor& io_ex)
|
|
{
|
|
bool is_continuation =
|
|
asio_handler_cont_helpers::is_continuation(handler);
|
|
|
|
typename associated_cancellation_slot<Handler>::type slot
|
|
= asio::get_associated_cancellation_slot(handler);
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef reactive_socket_accept_op<Socket, Protocol, Handler, IoExecutor> op;
|
|
typename op::ptr p = { asio::detail::addressof(handler),
|
|
op::ptr::allocate(handler), 0 };
|
|
p.p = new (p.v) op(success_ec_, impl.socket_, impl.state_,
|
|
peer, impl.protocol_, peer_endpoint, handler, io_ex);
|
|
|
|
// Optionally register for per-operation cancellation.
|
|
if (slot.is_connected() && !peer.is_open())
|
|
{
|
|
p.p->cancellation_key_ =
|
|
&slot.template emplace<reactor_op_cancellation>(
|
|
&reactor_, &impl.reactor_data_, impl.socket_, reactor::read_op);
|
|
}
|
|
|
|
ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
|
|
&impl, impl.socket_, "async_accept"));
|
|
|
|
start_accept_op(impl, p.p, is_continuation, peer.is_open(), &io_ex, 0);
|
|
p.v = p.p = 0;
|
|
}
|
|
|
|
#if defined(ASIO_HAS_MOVE)
|
|
// Start an asynchronous accept. The peer_endpoint object must be valid until
|
|
// the accept's handler is invoked.
|
|
template <typename PeerIoExecutor, typename Handler, typename IoExecutor>
|
|
void async_move_accept(implementation_type& impl,
|
|
const PeerIoExecutor& peer_io_ex, endpoint_type* peer_endpoint,
|
|
Handler& handler, const IoExecutor& io_ex)
|
|
{
|
|
bool is_continuation =
|
|
asio_handler_cont_helpers::is_continuation(handler);
|
|
|
|
typename associated_cancellation_slot<Handler>::type slot
|
|
= asio::get_associated_cancellation_slot(handler);
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef reactive_socket_move_accept_op<Protocol,
|
|
PeerIoExecutor, Handler, IoExecutor> op;
|
|
typename op::ptr p = { asio::detail::addressof(handler),
|
|
op::ptr::allocate(handler), 0 };
|
|
p.p = new (p.v) op(success_ec_, peer_io_ex, impl.socket_,
|
|
impl.state_, impl.protocol_, peer_endpoint, handler, io_ex);
|
|
|
|
// Optionally register for per-operation cancellation.
|
|
if (slot.is_connected())
|
|
{
|
|
p.p->cancellation_key_ =
|
|
&slot.template emplace<reactor_op_cancellation>(
|
|
&reactor_, &impl.reactor_data_, impl.socket_, reactor::read_op);
|
|
}
|
|
|
|
ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
|
|
&impl, impl.socket_, "async_accept"));
|
|
|
|
start_accept_op(impl, p.p, is_continuation, false, &io_ex, 0);
|
|
p.v = p.p = 0;
|
|
}
|
|
#endif // defined(ASIO_HAS_MOVE)
|
|
|
|
// Connect the socket to the specified endpoint.
|
|
asio::error_code connect(implementation_type& impl,
|
|
const endpoint_type& peer_endpoint, asio::error_code& ec)
|
|
{
|
|
socket_ops::sync_connect(impl.socket_,
|
|
peer_endpoint.data(), peer_endpoint.size(), ec);
|
|
ASIO_ERROR_LOCATION(ec);
|
|
return ec;
|
|
}
|
|
|
|
// Start an asynchronous connect.
|
|
template <typename Handler, typename IoExecutor>
|
|
void async_connect(implementation_type& impl,
|
|
const endpoint_type& peer_endpoint,
|
|
Handler& handler, const IoExecutor& io_ex)
|
|
{
|
|
bool is_continuation =
|
|
asio_handler_cont_helpers::is_continuation(handler);
|
|
|
|
typename associated_cancellation_slot<Handler>::type slot
|
|
= asio::get_associated_cancellation_slot(handler);
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef reactive_socket_connect_op<Handler, IoExecutor> op;
|
|
typename op::ptr p = { asio::detail::addressof(handler),
|
|
op::ptr::allocate(handler), 0 };
|
|
p.p = new (p.v) op(success_ec_, impl.socket_, handler, io_ex);
|
|
|
|
// Optionally register for per-operation cancellation.
|
|
if (slot.is_connected())
|
|
{
|
|
p.p->cancellation_key_ =
|
|
&slot.template emplace<reactor_op_cancellation>(
|
|
&reactor_, &impl.reactor_data_, impl.socket_, reactor::connect_op);
|
|
}
|
|
|
|
ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
|
|
&impl, impl.socket_, "async_connect"));
|
|
|
|
start_connect_op(impl, p.p, is_continuation,
|
|
peer_endpoint.data(), peer_endpoint.size(), &io_ex, 0);
|
|
p.v = p.p = 0;
|
|
}
|
|
};
|
|
|
|
} // namespace detail
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // !defined(ASIO_HAS_IOCP)
|
|
// && !defined(ASIO_HAS_IO_URING_AS_DEFAULT)
|
|
|
|
#endif // ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
|