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-//
-// detail/reactive_socket_service.hpp
-// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-#ifndef ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
-#define ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include "asio/detail/config.hpp"
-
-#if !defined(ASIO_HAS_IOCP)
-
-#include "asio/buffer.hpp"
-#include "asio/error.hpp"
-#include "asio/io_context.hpp"
-#include "asio/socket_base.hpp"
-#include "asio/detail/buffer_sequence_adapter.hpp"
-#include "asio/detail/memory.hpp"
-#include "asio/detail/noncopyable.hpp"
-#include "asio/detail/reactive_null_buffers_op.hpp"
-#include "asio/detail/reactive_socket_accept_op.hpp"
-#include "asio/detail/reactive_socket_connect_op.hpp"
-#include "asio/detail/reactive_socket_recvfrom_op.hpp"
-#include "asio/detail/reactive_socket_sendto_op.hpp"
-#include "asio/detail/reactive_socket_service_base.hpp"
-#include "asio/detail/reactor.hpp"
-#include "asio/detail/reactor_op.hpp"
-#include "asio/detail/socket_holder.hpp"
-#include "asio/detail/socket_ops.hpp"
-#include "asio/detail/socket_types.hpp"
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-namespace detail {
-
-template <typename Protocol>
-class reactive_socket_service :
- public service_base<reactive_socket_service<Protocol> >,
- public reactive_socket_service_base
-{
-public:
- // The protocol type.
- typedef Protocol protocol_type;
-
- // The endpoint type.
- typedef typename Protocol::endpoint endpoint_type;
-
- // The native type of a socket.
- typedef socket_type native_handle_type;
-
- // The implementation type of the socket.
- struct implementation_type :
- reactive_socket_service_base::base_implementation_type
- {
- // Default constructor.
- implementation_type()
- : protocol_(endpoint_type().protocol())
- {
- }
-
- // The protocol associated with the socket.
- protocol_type protocol_;
- };
-
- // Constructor.
- reactive_socket_service(asio::io_context& io_context)
- : service_base<reactive_socket_service<Protocol> >(io_context),
- reactive_socket_service_base(io_context)
- {
- }
-
- // Destroy all user-defined handler objects owned by the service.
- void shutdown()
- {
- this->base_shutdown();
- }
-
- // Move-construct a new socket implementation.
- void move_construct(implementation_type& impl,
- implementation_type& other_impl)
- {
- this->base_move_construct(impl, other_impl);
-
- impl.protocol_ = other_impl.protocol_;
- other_impl.protocol_ = endpoint_type().protocol();
- }
-
- // Move-assign from another socket implementation.
- void move_assign(implementation_type& impl,
- reactive_socket_service_base& other_service,
- implementation_type& other_impl)
- {
- this->base_move_assign(impl, other_service, other_impl);
-
- impl.protocol_ = other_impl.protocol_;
- other_impl.protocol_ = endpoint_type().protocol();
- }
-
- // Move-construct a new socket implementation from another protocol type.
- template <typename Protocol1>
- void converting_move_construct(implementation_type& impl,
- reactive_socket_service<Protocol1>&,
- typename reactive_socket_service<
- Protocol1>::implementation_type& other_impl)
- {
- this->base_move_construct(impl, other_impl);
-
- impl.protocol_ = protocol_type(other_impl.protocol_);
- other_impl.protocol_ = typename Protocol1::endpoint().protocol();
- }
-
- // Open a new socket implementation.
- asio::error_code open(implementation_type& impl,
- const protocol_type& protocol, asio::error_code& ec)
- {
- if (!do_open(impl, protocol.family(),
- protocol.type(), protocol.protocol(), ec))
- impl.protocol_ = protocol;
- return ec;
- }
-
- // Assign a native socket to a socket implementation.
- asio::error_code assign(implementation_type& impl,
- const protocol_type& protocol, const native_handle_type& native_socket,
- asio::error_code& ec)
- {
- if (!do_assign(impl, protocol.type(), native_socket, ec))
- impl.protocol_ = protocol;
- return ec;
- }
-
- // Get the native socket representation.
- native_handle_type native_handle(implementation_type& impl)
- {
- return impl.socket_;
- }
-
- // Bind the socket to the specified local endpoint.
- asio::error_code bind(implementation_type& impl,
- const endpoint_type& endpoint, asio::error_code& ec)
- {
- socket_ops::bind(impl.socket_, endpoint.data(), endpoint.size(), ec);
- return ec;
- }
-
- // Set a socket option.
- template <typename Option>
- asio::error_code set_option(implementation_type& impl,
- const Option& option, asio::error_code& ec)
- {
- socket_ops::setsockopt(impl.socket_, impl.state_,
- option.level(impl.protocol_), option.name(impl.protocol_),
- option.data(impl.protocol_), option.size(impl.protocol_), ec);
- return ec;
- }
-
- // Set a socket option.
- template <typename Option>
- asio::error_code get_option(const implementation_type& impl,
- Option& option, asio::error_code& ec) const
- {
- std::size_t size = option.size(impl.protocol_);
- socket_ops::getsockopt(impl.socket_, impl.state_,
- option.level(impl.protocol_), option.name(impl.protocol_),
- option.data(impl.protocol_), &size, ec);
- if (!ec)
- option.resize(impl.protocol_, size);
- return ec;
- }
-
- // Get the local endpoint.
- endpoint_type local_endpoint(const implementation_type& impl,
- asio::error_code& ec) const
- {
- endpoint_type endpoint;
- std::size_t addr_len = endpoint.capacity();
- if (socket_ops::getsockname(impl.socket_, endpoint.data(), &addr_len, ec))
- return endpoint_type();
- endpoint.resize(addr_len);
- return endpoint;
- }
-
- // Get the remote endpoint.
- endpoint_type remote_endpoint(const implementation_type& impl,
- asio::error_code& ec) const
- {
- endpoint_type endpoint;
- std::size_t addr_len = endpoint.capacity();
- if (socket_ops::getpeername(impl.socket_,
- endpoint.data(), &addr_len, false, ec))
- return endpoint_type();
- endpoint.resize(addr_len);
- return endpoint;
- }
-
- // Disable sends or receives on the socket.
- asio::error_code shutdown(base_implementation_type& impl,
- socket_base::shutdown_type what, asio::error_code& ec)
- {
- socket_ops::shutdown(impl.socket_, what, ec);
- return ec;
- }
-
- // Send a datagram to the specified endpoint. Returns the number of bytes
- // sent.
- template <typename ConstBufferSequence>
- size_t send_to(implementation_type& impl, const ConstBufferSequence& buffers,
- const endpoint_type& destination, socket_base::message_flags flags,
- asio::error_code& ec)
- {
- buffer_sequence_adapter<asio::const_buffer,
- ConstBufferSequence> bufs(buffers);
-
- return socket_ops::sync_sendto(impl.socket_, impl.state_,
- bufs.buffers(), bufs.count(), flags,
- destination.data(), destination.size(), ec);
- }
-
- // Wait until data can be sent without blocking.
- size_t send_to(implementation_type& impl, const null_buffers&,
- const endpoint_type&, socket_base::message_flags,
- asio::error_code& ec)
- {
- // Wait for socket to become ready.
- socket_ops::poll_write(impl.socket_, impl.state_, -1, ec);
-
- return 0;
- }
-
- // Start an asynchronous send. The data being sent must be valid for the
- // lifetime of the asynchronous operation.
- template <typename ConstBufferSequence, typename Handler>
- void async_send_to(implementation_type& impl,
- const ConstBufferSequence& buffers,
- const endpoint_type& destination, socket_base::message_flags flags,
- Handler& handler)
- {
- bool is_continuation =
- asio_handler_cont_helpers::is_continuation(handler);
-
- // Allocate and construct an operation to wrap the handler.
- typedef reactive_socket_sendto_op<ConstBufferSequence,
- endpoint_type, Handler> op;
- typename op::ptr p = { asio::detail::addressof(handler),
- op::ptr::allocate(handler), 0 };
- p.p = new (p.v) op(impl.socket_, buffers, destination, flags, handler);
-
- ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
- &impl, impl.socket_, "async_send_to"));
-
- start_op(impl, reactor::write_op, p.p, is_continuation, true, false);
- p.v = p.p = 0;
- }
-
- // Start an asynchronous wait until data can be sent without blocking.
- template <typename Handler>
- void async_send_to(implementation_type& impl, const null_buffers&,
- const endpoint_type&, socket_base::message_flags, Handler& handler)
- {
- bool is_continuation =
- asio_handler_cont_helpers::is_continuation(handler);
-
- // Allocate and construct an operation to wrap the handler.
- typedef reactive_null_buffers_op<Handler> op;
- typename op::ptr p = { asio::detail::addressof(handler),
- op::ptr::allocate(handler), 0 };
- p.p = new (p.v) op(handler);
-
- ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
- &impl, impl.socket_, "async_send_to(null_buffers)"));
-
- start_op(impl, reactor::write_op, p.p, is_continuation, false, false);
- p.v = p.p = 0;
- }
-
- // Receive a datagram with the endpoint of the sender. Returns the number of
- // bytes received.
- template <typename MutableBufferSequence>
- size_t receive_from(implementation_type& impl,
- const MutableBufferSequence& buffers,
- endpoint_type& sender_endpoint, socket_base::message_flags flags,
- asio::error_code& ec)
- {
- buffer_sequence_adapter<asio::mutable_buffer,
- MutableBufferSequence> bufs(buffers);
-
- std::size_t addr_len = sender_endpoint.capacity();
- std::size_t bytes_recvd = socket_ops::sync_recvfrom(
- impl.socket_, impl.state_, bufs.buffers(), bufs.count(),
- flags, sender_endpoint.data(), &addr_len, ec);
-
- if (!ec)
- sender_endpoint.resize(addr_len);
-
- return bytes_recvd;
- }
-
- // Wait until data can be received without blocking.
- size_t receive_from(implementation_type& impl, const null_buffers&,
- endpoint_type& sender_endpoint, socket_base::message_flags,
- asio::error_code& ec)
- {
- // Wait for socket to become ready.
- socket_ops::poll_read(impl.socket_, impl.state_, -1, ec);
-
- // Reset endpoint since it can be given no sensible value at this time.
- sender_endpoint = endpoint_type();
-
- return 0;
- }
-
- // Start an asynchronous receive. The buffer for the data being received and
- // the sender_endpoint object must both be valid for the lifetime of the
- // asynchronous operation.
- template <typename MutableBufferSequence, typename Handler>
- void async_receive_from(implementation_type& impl,
- const MutableBufferSequence& buffers, endpoint_type& sender_endpoint,
- socket_base::message_flags flags, Handler& handler)
- {
- bool is_continuation =
- asio_handler_cont_helpers::is_continuation(handler);
-
- // Allocate and construct an operation to wrap the handler.
- typedef reactive_socket_recvfrom_op<MutableBufferSequence,
- endpoint_type, Handler> op;
- typename op::ptr p = { asio::detail::addressof(handler),
- op::ptr::allocate(handler), 0 };
- int protocol = impl.protocol_.type();
- p.p = new (p.v) op(impl.socket_, protocol,
- buffers, sender_endpoint, flags, handler);
-
- ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
- &impl, impl.socket_, "async_receive_from"));
-
- start_op(impl,
- (flags & socket_base::message_out_of_band)
- ? reactor::except_op : reactor::read_op,
- p.p, is_continuation, true, false);
- p.v = p.p = 0;
- }
-
- // Wait until data can be received without blocking.
- template <typename Handler>
- void async_receive_from(implementation_type& impl,
- const null_buffers&, endpoint_type& sender_endpoint,
- socket_base::message_flags flags, Handler& handler)
- {
- bool is_continuation =
- asio_handler_cont_helpers::is_continuation(handler);
-
- // Allocate and construct an operation to wrap the handler.
- typedef reactive_null_buffers_op<Handler> op;
- typename op::ptr p = { asio::detail::addressof(handler),
- op::ptr::allocate(handler), 0 };
- p.p = new (p.v) op(handler);
-
- ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
- &impl, impl.socket_, "async_receive_from(null_buffers)"));
-
- // Reset endpoint since it can be given no sensible value at this time.
- sender_endpoint = endpoint_type();
-
- start_op(impl,
- (flags & socket_base::message_out_of_band)
- ? reactor::except_op : reactor::read_op,
- p.p, is_continuation, false, false);
- p.v = p.p = 0;
- }
-
- // Accept a new connection.
- template <typename Socket>
- asio::error_code accept(implementation_type& impl,
- Socket& peer, endpoint_type* peer_endpoint, asio::error_code& ec)
- {
- // We cannot accept a socket that is already open.
- if (peer.is_open())
- {
- ec = asio::error::already_open;
- return ec;
- }
-
- std::size_t addr_len = peer_endpoint ? peer_endpoint->capacity() : 0;
- socket_holder new_socket(socket_ops::sync_accept(impl.socket_,
- impl.state_, peer_endpoint ? peer_endpoint->data() : 0,
- peer_endpoint ? &addr_len : 0, ec));
-
- // On success, assign new connection to peer socket object.
- if (new_socket.get() != invalid_socket)
- {
- if (peer_endpoint)
- peer_endpoint->resize(addr_len);
- peer.assign(impl.protocol_, new_socket.get(), ec);
- if (!ec)
- new_socket.release();
- }
-
- return ec;
- }
-
-#if defined(ASIO_HAS_MOVE)
- // Accept a new connection.
- typename Protocol::socket accept(implementation_type& impl,
- io_context* peer_io_context, endpoint_type* peer_endpoint,
- asio::error_code& ec)
- {
- typename Protocol::socket peer(
- peer_io_context ? *peer_io_context : io_context_);
-
- std::size_t addr_len = peer_endpoint ? peer_endpoint->capacity() : 0;
- socket_holder new_socket(socket_ops::sync_accept(impl.socket_,
- impl.state_, peer_endpoint ? peer_endpoint->data() : 0,
- peer_endpoint ? &addr_len : 0, ec));
-
- // On success, assign new connection to peer socket object.
- if (new_socket.get() != invalid_socket)
- {
- if (peer_endpoint)
- peer_endpoint->resize(addr_len);
- peer.assign(impl.protocol_, new_socket.get(), ec);
- if (!ec)
- new_socket.release();
- }
-
- return peer;
- }
-#endif // defined(ASIO_HAS_MOVE)
-
- // 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>
- void async_accept(implementation_type& impl, Socket& peer,
- endpoint_type* peer_endpoint, Handler& handler)
- {
- bool is_continuation =
- asio_handler_cont_helpers::is_continuation(handler);
-
- // Allocate and construct an operation to wrap the handler.
- typedef reactive_socket_accept_op<Socket, Protocol, Handler> op;
- typename op::ptr p = { asio::detail::addressof(handler),
- op::ptr::allocate(handler), 0 };
- p.p = new (p.v) op(impl.socket_, impl.state_, peer,
- impl.protocol_, peer_endpoint, handler);
-
- ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
- &impl, impl.socket_, "async_accept"));
-
- start_accept_op(impl, p.p, is_continuation, peer.is_open());
- 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 Handler>
- void async_accept(implementation_type& impl,
- asio::io_context* peer_io_context,
- endpoint_type* peer_endpoint, Handler& handler)
- {
- bool is_continuation =
- asio_handler_cont_helpers::is_continuation(handler);
-
- // Allocate and construct an operation to wrap the handler.
- typedef reactive_socket_move_accept_op<Protocol, Handler> op;
- typename op::ptr p = { asio::detail::addressof(handler),
- op::ptr::allocate(handler), 0 };
- p.p = new (p.v) op(peer_io_context ? *peer_io_context : io_context_,
- impl.socket_, impl.state_, impl.protocol_, peer_endpoint, handler);
-
- ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
- &impl, impl.socket_, "async_accept"));
-
- start_accept_op(impl, p.p, is_continuation, false);
- 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);
- return ec;
- }
-
- // Start an asynchronous connect.
- template <typename Handler>
- void async_connect(implementation_type& impl,
- const endpoint_type& peer_endpoint, Handler& handler)
- {
- bool is_continuation =
- asio_handler_cont_helpers::is_continuation(handler);
-
- // Allocate and construct an operation to wrap the handler.
- typedef reactive_socket_connect_op<Handler> op;
- typename op::ptr p = { asio::detail::addressof(handler),
- op::ptr::allocate(handler), 0 };
- p.p = new (p.v) op(impl.socket_, handler);
-
- 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());
- p.v = p.p = 0;
- }
-};
-
-} // namespace detail
-} // namespace asio
-
-#include "asio/detail/pop_options.hpp"
-
-#endif // !defined(ASIO_HAS_IOCP)
-
-#endif // ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP