2414 lines
76 KiB
C++
2414 lines
76 KiB
C++
//
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// win_iocp_socket_service.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2008 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_WIN_IOCP_SOCKET_SERVICE_HPP
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#define ASIO_DETAIL_WIN_IOCP_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/push_options.hpp"
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#include "asio/detail/win_iocp_io_service_fwd.hpp"
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#if defined(ASIO_HAS_IOCP)
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#include "asio/detail/push_options.hpp"
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#include <cstring>
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#include <boost/shared_ptr.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/weak_ptr.hpp>
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#include "asio/detail/pop_options.hpp"
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#include "asio/buffer.hpp"
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#include "asio/error.hpp"
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#include "asio/io_service.hpp"
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#include "asio/socket_base.hpp"
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#include "asio/detail/bind_handler.hpp"
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#include "asio/detail/handler_alloc_helpers.hpp"
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#include "asio/detail/handler_invoke_helpers.hpp"
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#include "asio/detail/mutex.hpp"
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#include "asio/detail/select_reactor.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/win_iocp_io_service.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 win_iocp_socket_service
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: public asio::detail::service_base<win_iocp_socket_service<Protocol> >
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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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// Base class for all operations.
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typedef win_iocp_io_service::operation operation;
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struct noop_deleter { void operator()(void*) {} };
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typedef boost::shared_ptr<void> shared_cancel_token_type;
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typedef boost::weak_ptr<void> weak_cancel_token_type;
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// The native type of a socket.
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class native_type
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{
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public:
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native_type(socket_type s)
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: socket_(s),
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have_remote_endpoint_(false)
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{
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}
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native_type(socket_type s, const endpoint_type& ep)
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: socket_(s),
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have_remote_endpoint_(true),
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remote_endpoint_(ep)
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{
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}
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void operator=(socket_type s)
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{
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socket_ = s;
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have_remote_endpoint_ = false;
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remote_endpoint_ = endpoint_type();
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}
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operator socket_type() const
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{
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return socket_;
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}
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HANDLE as_handle() const
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{
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return reinterpret_cast<HANDLE>(socket_);
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}
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bool have_remote_endpoint() const
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{
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return have_remote_endpoint_;
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}
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endpoint_type remote_endpoint() const
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{
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return remote_endpoint_;
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}
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private:
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socket_type socket_;
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bool have_remote_endpoint_;
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endpoint_type remote_endpoint_;
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};
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// The type of the reactor used for connect operations.
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typedef detail::select_reactor<true> reactor_type;
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// The implementation type of the socket.
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class implementation_type
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{
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public:
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// Default constructor.
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implementation_type()
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: socket_(invalid_socket),
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flags_(0),
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cancel_token_(),
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protocol_(endpoint_type().protocol()),
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next_(0),
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prev_(0)
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{
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}
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private:
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// Only this service will have access to the internal values.
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friend class win_iocp_socket_service;
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// The native socket representation.
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native_type socket_;
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enum
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{
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enable_connection_aborted = 1, // User wants connection_aborted errors.
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close_might_block = 2, // User set linger option for blocking close.
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user_set_non_blocking = 4 // The user wants a non-blocking socket.
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};
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// Flags indicating the current state of the socket.
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unsigned char flags_;
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// We use a shared pointer as a cancellation token here to work around the
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// broken Windows support for cancellation. MSDN says that when you call
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// closesocket any outstanding WSARecv or WSASend operations will complete
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// with the error ERROR_OPERATION_ABORTED. In practice they complete with
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// ERROR_NETNAME_DELETED, which means you can't tell the difference between
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// a local cancellation and the socket being hard-closed by the peer.
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shared_cancel_token_type cancel_token_;
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// The protocol associated with the socket.
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protocol_type protocol_;
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// Per-descriptor data used by the reactor.
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reactor_type::per_descriptor_data reactor_data_;
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#if defined(ASIO_ENABLE_CANCELIO)
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// The ID of the thread from which it is safe to cancel asynchronous
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// operations. 0 means no asynchronous operations have been started yet.
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// ~0 means asynchronous operations have been started from more than one
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// thread, and cancellation is not supported for the socket.
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DWORD safe_cancellation_thread_id_;
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#endif // defined(ASIO_ENABLE_CANCELIO)
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// Pointers to adjacent socket implementations in linked list.
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implementation_type* next_;
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implementation_type* prev_;
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};
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// The maximum number of buffers to support in a single operation.
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enum { max_buffers = 64 < max_iov_len ? 64 : max_iov_len };
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// Constructor.
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win_iocp_socket_service(asio::io_service& io_service)
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: asio::detail::service_base<
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win_iocp_socket_service<Protocol> >(io_service),
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iocp_service_(asio::use_service<win_iocp_io_service>(io_service)),
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reactor_(0),
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mutex_(),
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impl_list_(0)
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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_service()
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{
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// Close all implementations, causing all operations to complete.
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asio::detail::mutex::scoped_lock lock(mutex_);
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implementation_type* impl = impl_list_;
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while (impl)
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{
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asio::error_code ignored_ec;
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close_for_destruction(*impl);
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impl = impl->next_;
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}
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}
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// Construct a new socket implementation.
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void construct(implementation_type& impl)
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{
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impl.socket_ = invalid_socket;
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impl.flags_ = 0;
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impl.cancel_token_.reset();
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#if defined(ASIO_ENABLE_CANCELIO)
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impl.safe_cancellation_thread_id_ = 0;
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#endif // defined(ASIO_ENABLE_CANCELIO)
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// Insert implementation into linked list of all implementations.
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asio::detail::mutex::scoped_lock lock(mutex_);
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impl.next_ = impl_list_;
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impl.prev_ = 0;
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if (impl_list_)
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impl_list_->prev_ = &impl;
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impl_list_ = &impl;
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}
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// Destroy a socket implementation.
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void destroy(implementation_type& impl)
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{
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close_for_destruction(impl);
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// Remove implementation from linked list of all implementations.
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asio::detail::mutex::scoped_lock lock(mutex_);
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if (impl_list_ == &impl)
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impl_list_ = impl.next_;
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if (impl.prev_)
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impl.prev_->next_ = impl.next_;
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if (impl.next_)
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impl.next_->prev_= impl.prev_;
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impl.next_ = 0;
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impl.prev_ = 0;
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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 (is_open(impl))
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{
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ec = asio::error::already_open;
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return ec;
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}
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socket_holder sock(socket_ops::socket(protocol.family(), protocol.type(),
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protocol.protocol(), ec));
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if (sock.get() == invalid_socket)
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return ec;
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HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock.get());
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if (iocp_service_.register_handle(sock_as_handle, ec))
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return ec;
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impl.socket_ = sock.release();
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impl.flags_ = 0;
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impl.cancel_token_.reset(static_cast<void*>(0), noop_deleter());
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impl.protocol_ = protocol;
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ec = asio::error_code();
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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_type& native_socket,
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asio::error_code& ec)
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{
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if (is_open(impl))
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{
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ec = asio::error::already_open;
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return ec;
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}
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if (iocp_service_.register_handle(native_socket.as_handle(), ec))
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return ec;
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impl.socket_ = native_socket;
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impl.flags_ = 0;
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impl.cancel_token_.reset(static_cast<void*>(0), noop_deleter());
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impl.protocol_ = protocol;
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ec = asio::error_code();
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return ec;
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}
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// Determine whether the socket is open.
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bool is_open(const implementation_type& impl) const
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{
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return impl.socket_ != invalid_socket;
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}
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// Destroy a socket implementation.
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asio::error_code close(implementation_type& impl,
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asio::error_code& ec)
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{
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if (is_open(impl))
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{
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// Check if the reactor was created, in which case we need to close the
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// socket on the reactor as well to cancel any operations that might be
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// running there.
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reactor_type* reactor = static_cast<reactor_type*>(
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interlocked_compare_exchange_pointer(
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reinterpret_cast<void**>(&reactor_), 0, 0));
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if (reactor)
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reactor->close_descriptor(impl.socket_, impl.reactor_data_);
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if (socket_ops::close(impl.socket_, ec) == socket_error_retval)
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return ec;
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impl.socket_ = invalid_socket;
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impl.flags_ = 0;
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impl.cancel_token_.reset();
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#if defined(ASIO_ENABLE_CANCELIO)
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impl.safe_cancellation_thread_id_ = 0;
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#endif // defined(ASIO_ENABLE_CANCELIO)
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}
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ec = asio::error_code();
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return ec;
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}
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// Get the native socket representation.
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native_type native(implementation_type& impl)
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{
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return impl.socket_;
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}
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// Cancel all operations associated with the socket.
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asio::error_code cancel(implementation_type& impl,
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asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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else if (FARPROC cancel_io_ex_ptr = ::GetProcAddress(
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::GetModuleHandleA("KERNEL32"), "CancelIoEx"))
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{
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// The version of Windows supports cancellation from any thread.
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typedef BOOL (WINAPI* cancel_io_ex_t)(HANDLE, LPOVERLAPPED);
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cancel_io_ex_t cancel_io_ex = (cancel_io_ex_t)cancel_io_ex_ptr;
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socket_type sock = impl.socket_;
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HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock);
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if (!cancel_io_ex(sock_as_handle, 0))
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{
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DWORD last_error = ::GetLastError();
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if (last_error == ERROR_NOT_FOUND)
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{
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// ERROR_NOT_FOUND means that there were no operations to be
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// cancelled. We swallow this error to match the behaviour on other
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// platforms.
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ec = asio::error_code();
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}
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else
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{
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ec = asio::error_code(last_error,
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asio::error::get_system_category());
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}
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}
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else
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{
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ec = asio::error_code();
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}
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}
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#if defined(ASIO_ENABLE_CANCELIO)
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else if (impl.safe_cancellation_thread_id_ == 0)
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{
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// No operations have been started, so there's nothing to cancel.
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ec = asio::error_code();
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}
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else if (impl.safe_cancellation_thread_id_ == ::GetCurrentThreadId())
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{
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// Asynchronous operations have been started from the current thread only,
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// so it is safe to try to cancel them using CancelIo.
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socket_type sock = impl.socket_;
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HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock);
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if (!::CancelIo(sock_as_handle))
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{
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DWORD last_error = ::GetLastError();
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ec = asio::error_code(last_error,
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asio::error::get_system_category());
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}
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else
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{
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ec = asio::error_code();
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}
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}
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else
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{
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// Asynchronous operations have been started from more than one thread,
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// so cancellation is not safe.
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ec = asio::error::operation_not_supported;
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}
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#else // defined(ASIO_ENABLE_CANCELIO)
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else
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{
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// Cancellation is not supported as CancelIo may not be used.
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ec = asio::error::operation_not_supported;
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}
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#endif // defined(ASIO_ENABLE_CANCELIO)
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return ec;
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}
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// Determine whether the socket is at the out-of-band data mark.
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bool at_mark(const implementation_type& impl,
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asio::error_code& ec) const
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return false;
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}
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asio::detail::ioctl_arg_type value = 0;
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socket_ops::ioctl(impl.socket_, SIOCATMARK, &value, ec);
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return ec ? false : value != 0;
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}
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// Determine the number of bytes available for reading.
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std::size_t available(const implementation_type& impl,
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asio::error_code& ec) const
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return 0;
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}
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asio::detail::ioctl_arg_type value = 0;
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socket_ops::ioctl(impl.socket_, FIONREAD, &value, ec);
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return ec ? static_cast<std::size_t>(0) : static_cast<std::size_t>(value);
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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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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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socket_ops::bind(impl.socket_, endpoint.data(), endpoint.size(), ec);
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return ec;
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}
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// Place the socket into the state where it will listen for new connections.
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asio::error_code listen(implementation_type& impl, int backlog,
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asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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socket_ops::listen(impl.socket_, backlog, 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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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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if (option.level(impl.protocol_) == custom_socket_option_level
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&& option.name(impl.protocol_) == enable_connection_aborted_option)
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{
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if (option.size(impl.protocol_) != sizeof(int))
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{
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ec = asio::error::invalid_argument;
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}
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else
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{
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if (*reinterpret_cast<const int*>(option.data(impl.protocol_)))
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impl.flags_ |= implementation_type::enable_connection_aborted;
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else
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impl.flags_ &= ~implementation_type::enable_connection_aborted;
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ec = asio::error_code();
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}
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return ec;
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}
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else
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{
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if (option.level(impl.protocol_) == SOL_SOCKET
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&& option.name(impl.protocol_) == SO_LINGER)
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{
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const ::linger* linger_option =
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reinterpret_cast<const ::linger*>(option.data(impl.protocol_));
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if (linger_option->l_onoff != 0 && linger_option->l_linger != 0)
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impl.flags_ |= implementation_type::close_might_block;
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else
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impl.flags_ &= ~implementation_type::close_might_block;
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}
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socket_ops::setsockopt(impl.socket_,
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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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return ec;
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}
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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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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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if (option.level(impl.protocol_) == custom_socket_option_level
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&& option.name(impl.protocol_) == enable_connection_aborted_option)
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{
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if (option.size(impl.protocol_) != sizeof(int))
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{
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ec = asio::error::invalid_argument;
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}
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else
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{
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int* target = reinterpret_cast<int*>(option.data(impl.protocol_));
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if (impl.flags_ & implementation_type::enable_connection_aborted)
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*target = 1;
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else
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*target = 0;
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option.resize(impl.protocol_, sizeof(int));
|
|
ec = asio::error_code();
|
|
}
|
|
return ec;
|
|
}
|
|
else
|
|
{
|
|
size_t size = option.size(impl.protocol_);
|
|
socket_ops::getsockopt(impl.socket_,
|
|
option.level(impl.protocol_), option.name(impl.protocol_),
|
|
option.data(impl.protocol_), &size, ec);
|
|
if (!ec)
|
|
option.resize(impl.protocol_, size);
|
|
return ec;
|
|
}
|
|
}
|
|
|
|
// Perform an IO control command on the socket.
|
|
template <typename IO_Control_Command>
|
|
asio::error_code io_control(implementation_type& impl,
|
|
IO_Control_Command& command, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return ec;
|
|
}
|
|
|
|
socket_ops::ioctl(impl.socket_, command.name(),
|
|
static_cast<ioctl_arg_type*>(command.data()), ec);
|
|
|
|
if (!ec && command.name() == static_cast<int>(FIONBIO))
|
|
{
|
|
if (command.get())
|
|
impl.flags_ |= implementation_type::user_set_non_blocking;
|
|
else
|
|
impl.flags_ &= ~implementation_type::user_set_non_blocking;
|
|
}
|
|
|
|
return ec;
|
|
}
|
|
|
|
// Get the local endpoint.
|
|
endpoint_type local_endpoint(const implementation_type& impl,
|
|
asio::error_code& ec) const
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return endpoint_type();
|
|
}
|
|
|
|
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
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return endpoint_type();
|
|
}
|
|
|
|
if (impl.socket_.have_remote_endpoint())
|
|
{
|
|
// Check if socket is still connected.
|
|
DWORD connect_time = 0;
|
|
size_t connect_time_len = sizeof(connect_time);
|
|
if (socket_ops::getsockopt(impl.socket_, SOL_SOCKET, SO_CONNECT_TIME,
|
|
&connect_time, &connect_time_len, ec) == socket_error_retval)
|
|
{
|
|
return endpoint_type();
|
|
}
|
|
if (connect_time == 0xFFFFFFFF)
|
|
{
|
|
ec = asio::error::not_connected;
|
|
return endpoint_type();
|
|
}
|
|
|
|
ec = asio::error_code();
|
|
return impl.socket_.remote_endpoint();
|
|
}
|
|
else
|
|
{
|
|
endpoint_type endpoint;
|
|
std::size_t addr_len = endpoint.capacity();
|
|
if (socket_ops::getpeername(impl.socket_, endpoint.data(), &addr_len, ec))
|
|
return endpoint_type();
|
|
endpoint.resize(addr_len);
|
|
return endpoint;
|
|
}
|
|
}
|
|
|
|
/// Disable sends or receives on the socket.
|
|
asio::error_code shutdown(implementation_type& impl,
|
|
socket_base::shutdown_type what, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return ec;
|
|
}
|
|
|
|
socket_ops::shutdown(impl.socket_, what, ec);
|
|
return ec;
|
|
}
|
|
|
|
// Send the given data to the peer. Returns the number of bytes sent.
|
|
template <typename ConstBufferSequence>
|
|
size_t send(implementation_type& impl, const ConstBufferSequence& buffers,
|
|
socket_base::message_flags flags, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Copy buffers into WSABUF array.
|
|
::WSABUF bufs[max_buffers];
|
|
typename ConstBufferSequence::const_iterator iter = buffers.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers.end();
|
|
DWORD i = 0;
|
|
size_t total_buffer_size = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
bufs[i].len = static_cast<u_long>(asio::buffer_size(buffer));
|
|
bufs[i].buf = const_cast<char*>(
|
|
asio::buffer_cast<const char*>(buffer));
|
|
total_buffer_size += asio::buffer_size(buffer);
|
|
}
|
|
|
|
// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
|
|
{
|
|
ec = asio::error_code();
|
|
return 0;
|
|
}
|
|
|
|
// Send the data.
|
|
DWORD bytes_transferred = 0;
|
|
int result = ::WSASend(impl.socket_, bufs,
|
|
i, &bytes_transferred, flags, 0, 0);
|
|
if (result != 0)
|
|
{
|
|
DWORD last_error = ::WSAGetLastError();
|
|
if (last_error == ERROR_NETNAME_DELETED)
|
|
last_error = WSAECONNRESET;
|
|
else if (last_error == ERROR_PORT_UNREACHABLE)
|
|
last_error = WSAECONNREFUSED;
|
|
ec = asio::error_code(last_error,
|
|
asio::error::get_system_category());
|
|
return 0;
|
|
}
|
|
|
|
ec = asio::error_code();
|
|
return bytes_transferred;
|
|
}
|
|
|
|
// Wait until data can be sent without blocking.
|
|
size_t send(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_write(impl.socket_, ec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
template <typename ConstBufferSequence, typename Handler>
|
|
class send_operation
|
|
: public operation
|
|
{
|
|
public:
|
|
send_operation(win_iocp_io_service& io_service,
|
|
weak_cancel_token_type cancel_token,
|
|
const ConstBufferSequence& buffers, Handler handler)
|
|
: operation(io_service,
|
|
&send_operation<ConstBufferSequence, Handler>::do_completion_impl,
|
|
&send_operation<ConstBufferSequence, Handler>::destroy_impl),
|
|
work_(io_service.get_io_service()),
|
|
cancel_token_(cancel_token),
|
|
buffers_(buffers),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
private:
|
|
static void do_completion_impl(operation* op,
|
|
DWORD last_error, size_t bytes_transferred)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef send_operation<ConstBufferSequence, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
#if defined(ASIO_ENABLE_BUFFER_DEBUGGING)
|
|
// Check whether buffers are still valid.
|
|
typename ConstBufferSequence::const_iterator iter
|
|
= handler_op->buffers_.begin();
|
|
typename ConstBufferSequence::const_iterator end
|
|
= handler_op->buffers_.end();
|
|
while (iter != end)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
asio::buffer_cast<const char*>(buffer);
|
|
++iter;
|
|
}
|
|
#endif // defined(ASIO_ENABLE_BUFFER_DEBUGGING)
|
|
|
|
// Map non-portable errors to their portable counterparts.
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
if (ec.value() == ERROR_NETNAME_DELETED)
|
|
{
|
|
if (handler_op->cancel_token_.expired())
|
|
ec = asio::error::operation_aborted;
|
|
else
|
|
ec = asio::error::connection_reset;
|
|
}
|
|
else if (ec.value() == ERROR_PORT_UNREACHABLE)
|
|
{
|
|
ec = asio::error::connection_refused;
|
|
}
|
|
|
|
// Make a copy of the handler so that the memory can be deallocated before
|
|
// the upcall is made.
|
|
Handler handler(handler_op->handler_);
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
|
|
// Call the handler.
|
|
asio_handler_invoke_helpers::invoke(
|
|
detail::bind_handler(handler, ec, bytes_transferred), &handler);
|
|
}
|
|
|
|
static void destroy_impl(operation* op)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef send_operation<ConstBufferSequence, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
// A sub-object of the handler may be the true owner of the memory
|
|
// associated with the handler. Consequently, a local copy of the handler
|
|
// is required to ensure that any owning sub-object remains valid until
|
|
// after we have deallocated the memory here.
|
|
Handler handler(handler_op->handler_);
|
|
(void)handler;
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
}
|
|
|
|
asio::io_service::work work_;
|
|
weak_cancel_token_type cancel_token_;
|
|
ConstBufferSequence buffers_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// 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(implementation_type& impl, const ConstBufferSequence& buffers,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
return;
|
|
}
|
|
|
|
#if defined(ASIO_ENABLE_CANCELIO)
|
|
// Update the ID of the thread from which cancellation is safe.
|
|
if (impl.safe_cancellation_thread_id_ == 0)
|
|
impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
|
|
else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
|
|
impl.safe_cancellation_thread_id_ = ~DWORD(0);
|
|
#endif // defined(ASIO_ENABLE_CANCELIO)
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef send_operation<ConstBufferSequence, Handler> value_type;
|
|
typedef handler_alloc_traits<Handler, value_type> alloc_traits;
|
|
raw_handler_ptr<alloc_traits> raw_ptr(handler);
|
|
handler_ptr<alloc_traits> ptr(raw_ptr, iocp_service_,
|
|
impl.cancel_token_, buffers, handler);
|
|
|
|
// Copy buffers into WSABUF array.
|
|
::WSABUF bufs[max_buffers];
|
|
typename ConstBufferSequence::const_iterator iter = buffers.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers.end();
|
|
DWORD i = 0;
|
|
size_t total_buffer_size = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
bufs[i].len = static_cast<u_long>(asio::buffer_size(buffer));
|
|
bufs[i].buf = const_cast<char*>(
|
|
asio::buffer_cast<const char*>(buffer));
|
|
total_buffer_size += asio::buffer_size(buffer);
|
|
}
|
|
|
|
// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
|
|
{
|
|
asio::io_service::work work(this->get_io_service());
|
|
ptr.reset();
|
|
asio::error_code error;
|
|
iocp_service_.post(bind_handler(handler, error, 0));
|
|
return;
|
|
}
|
|
|
|
// Send the data.
|
|
DWORD bytes_transferred = 0;
|
|
int result = ::WSASend(impl.socket_, bufs, i,
|
|
&bytes_transferred, flags, ptr.get(), 0);
|
|
DWORD last_error = ::WSAGetLastError();
|
|
|
|
// Check if the operation completed immediately.
|
|
if (result != 0 && last_error != WSA_IO_PENDING)
|
|
{
|
|
asio::io_service::work work(this->get_io_service());
|
|
ptr.reset();
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
|
|
}
|
|
else
|
|
{
|
|
ptr.release();
|
|
}
|
|
}
|
|
|
|
template <typename Handler>
|
|
class null_buffers_operation
|
|
{
|
|
public:
|
|
null_buffers_operation(asio::io_service& io_service, Handler handler)
|
|
: work_(io_service),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code&,
|
|
std::size_t& bytes_transferred)
|
|
{
|
|
bytes_transferred = 0;
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec,
|
|
std::size_t bytes_transferred)
|
|
{
|
|
work_.get_io_service().post(bind_handler(
|
|
handler_, ec, bytes_transferred));
|
|
}
|
|
|
|
private:
|
|
asio::io_service::work work_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// Start an asynchronous wait until data can be sent without blocking.
|
|
template <typename Handler>
|
|
void async_send(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
// Check if the reactor was already obtained from the io_service.
|
|
reactor_type* reactor = static_cast<reactor_type*>(
|
|
interlocked_compare_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), 0, 0));
|
|
if (!reactor)
|
|
{
|
|
reactor = &(asio::use_service<reactor_type>(
|
|
this->get_io_service()));
|
|
interlocked_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), reactor);
|
|
}
|
|
|
|
reactor->start_write_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler),
|
|
false);
|
|
}
|
|
}
|
|
|
|
// 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)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Copy buffers into WSABUF array.
|
|
::WSABUF bufs[max_buffers];
|
|
typename ConstBufferSequence::const_iterator iter = buffers.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers.end();
|
|
DWORD i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
bufs[i].len = static_cast<u_long>(asio::buffer_size(buffer));
|
|
bufs[i].buf = const_cast<char*>(
|
|
asio::buffer_cast<const char*>(buffer));
|
|
}
|
|
|
|
// Send the data.
|
|
DWORD bytes_transferred = 0;
|
|
int result = ::WSASendTo(impl.socket_, bufs, i, &bytes_transferred,
|
|
flags, destination.data(), static_cast<int>(destination.size()), 0, 0);
|
|
if (result != 0)
|
|
{
|
|
DWORD last_error = ::WSAGetLastError();
|
|
if (last_error == ERROR_PORT_UNREACHABLE)
|
|
last_error = WSAECONNREFUSED;
|
|
ec = asio::error_code(last_error,
|
|
asio::error::get_system_category());
|
|
return 0;
|
|
}
|
|
|
|
ec = asio::error_code();
|
|
return bytes_transferred;
|
|
}
|
|
|
|
// Wait until data can be sent without blocking.
|
|
size_t send_to(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, const endpoint_type&,
|
|
asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_write(impl.socket_, ec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
template <typename ConstBufferSequence, typename Handler>
|
|
class send_to_operation
|
|
: public operation
|
|
{
|
|
public:
|
|
send_to_operation(win_iocp_io_service& io_service,
|
|
const ConstBufferSequence& buffers, Handler handler)
|
|
: operation(io_service,
|
|
&send_to_operation<ConstBufferSequence, Handler>::do_completion_impl,
|
|
&send_to_operation<ConstBufferSequence, Handler>::destroy_impl),
|
|
work_(io_service.get_io_service()),
|
|
buffers_(buffers),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
private:
|
|
static void do_completion_impl(operation* op,
|
|
DWORD last_error, size_t bytes_transferred)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef send_to_operation<ConstBufferSequence, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
#if defined(ASIO_ENABLE_BUFFER_DEBUGGING)
|
|
// Check whether buffers are still valid.
|
|
typename ConstBufferSequence::const_iterator iter
|
|
= handler_op->buffers_.begin();
|
|
typename ConstBufferSequence::const_iterator end
|
|
= handler_op->buffers_.end();
|
|
while (iter != end)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
asio::buffer_cast<const char*>(buffer);
|
|
++iter;
|
|
}
|
|
#endif // defined(ASIO_ENABLE_BUFFER_DEBUGGING)
|
|
|
|
// Map non-portable errors to their portable counterparts.
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
if (ec.value() == ERROR_PORT_UNREACHABLE)
|
|
{
|
|
ec = asio::error::connection_refused;
|
|
}
|
|
|
|
// Make a copy of the handler so that the memory can be deallocated before
|
|
// the upcall is made.
|
|
Handler handler(handler_op->handler_);
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
|
|
// Call the handler.
|
|
asio_handler_invoke_helpers::invoke(
|
|
detail::bind_handler(handler, ec, bytes_transferred), &handler);
|
|
}
|
|
|
|
static void destroy_impl(operation* op)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef send_to_operation<ConstBufferSequence, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
// A sub-object of the handler may be the true owner of the memory
|
|
// associated with the handler. Consequently, a local copy of the handler
|
|
// is required to ensure that any owning sub-object remains valid until
|
|
// after we have deallocated the memory here.
|
|
Handler handler(handler_op->handler_);
|
|
(void)handler;
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
}
|
|
|
|
asio::io_service::work work_;
|
|
ConstBufferSequence buffers_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// 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)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
return;
|
|
}
|
|
|
|
#if defined(ASIO_ENABLE_CANCELIO)
|
|
// Update the ID of the thread from which cancellation is safe.
|
|
if (impl.safe_cancellation_thread_id_ == 0)
|
|
impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
|
|
else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
|
|
impl.safe_cancellation_thread_id_ = ~DWORD(0);
|
|
#endif // defined(ASIO_ENABLE_CANCELIO)
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef send_to_operation<ConstBufferSequence, Handler> value_type;
|
|
typedef handler_alloc_traits<Handler, value_type> alloc_traits;
|
|
raw_handler_ptr<alloc_traits> raw_ptr(handler);
|
|
handler_ptr<alloc_traits> ptr(raw_ptr, iocp_service_, buffers, handler);
|
|
|
|
// Copy buffers into WSABUF array.
|
|
::WSABUF bufs[max_buffers];
|
|
typename ConstBufferSequence::const_iterator iter = buffers.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers.end();
|
|
DWORD i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
bufs[i].len = static_cast<u_long>(asio::buffer_size(buffer));
|
|
bufs[i].buf = const_cast<char*>(
|
|
asio::buffer_cast<const char*>(buffer));
|
|
}
|
|
|
|
// Send the data.
|
|
DWORD bytes_transferred = 0;
|
|
int result = ::WSASendTo(impl.socket_, bufs, i, &bytes_transferred, flags,
|
|
destination.data(), static_cast<int>(destination.size()), ptr.get(), 0);
|
|
DWORD last_error = ::WSAGetLastError();
|
|
|
|
// Check if the operation completed immediately.
|
|
if (result != 0 && last_error != WSA_IO_PENDING)
|
|
{
|
|
asio::io_service::work work(this->get_io_service());
|
|
ptr.reset();
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
|
|
}
|
|
else
|
|
{
|
|
ptr.release();
|
|
}
|
|
}
|
|
|
|
// Start an asynchronous wait until data can be sent without blocking.
|
|
template <typename Handler>
|
|
void async_send_to(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, const endpoint_type&, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
// Check if the reactor was already obtained from the io_service.
|
|
reactor_type* reactor = static_cast<reactor_type*>(
|
|
interlocked_compare_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), 0, 0));
|
|
if (!reactor)
|
|
{
|
|
reactor = &(asio::use_service<reactor_type>(
|
|
this->get_io_service()));
|
|
interlocked_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), reactor);
|
|
}
|
|
|
|
reactor->start_write_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler),
|
|
false);
|
|
}
|
|
}
|
|
|
|
// Receive some data from the peer. Returns the number of bytes received.
|
|
template <typename MutableBufferSequence>
|
|
size_t receive(implementation_type& impl,
|
|
const MutableBufferSequence& buffers,
|
|
socket_base::message_flags flags, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Copy buffers into WSABUF array.
|
|
::WSABUF bufs[max_buffers];
|
|
typename MutableBufferSequence::const_iterator iter = buffers.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers.end();
|
|
DWORD i = 0;
|
|
size_t total_buffer_size = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
bufs[i].len = static_cast<u_long>(asio::buffer_size(buffer));
|
|
bufs[i].buf = asio::buffer_cast<char*>(buffer);
|
|
total_buffer_size += asio::buffer_size(buffer);
|
|
}
|
|
|
|
// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
|
|
{
|
|
ec = asio::error_code();
|
|
return 0;
|
|
}
|
|
|
|
// Receive some data.
|
|
DWORD bytes_transferred = 0;
|
|
DWORD recv_flags = flags;
|
|
int result = ::WSARecv(impl.socket_, bufs, i,
|
|
&bytes_transferred, &recv_flags, 0, 0);
|
|
if (result != 0)
|
|
{
|
|
DWORD last_error = ::WSAGetLastError();
|
|
if (last_error == ERROR_NETNAME_DELETED)
|
|
last_error = WSAECONNRESET;
|
|
else if (last_error == ERROR_PORT_UNREACHABLE)
|
|
last_error = WSAECONNREFUSED;
|
|
ec = asio::error_code(last_error,
|
|
asio::error::get_system_category());
|
|
return 0;
|
|
}
|
|
if (bytes_transferred == 0 && impl.protocol_.type() == SOCK_STREAM)
|
|
{
|
|
ec = asio::error::eof;
|
|
return 0;
|
|
}
|
|
|
|
ec = asio::error_code();
|
|
return bytes_transferred;
|
|
}
|
|
|
|
// Wait until data can be received without blocking.
|
|
size_t receive(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_read(impl.socket_, ec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
template <typename MutableBufferSequence, typename Handler>
|
|
class receive_operation
|
|
: public operation
|
|
{
|
|
public:
|
|
receive_operation(int protocol_type, win_iocp_io_service& io_service,
|
|
weak_cancel_token_type cancel_token,
|
|
const MutableBufferSequence& buffers, Handler handler)
|
|
: operation(io_service,
|
|
&receive_operation<
|
|
MutableBufferSequence, Handler>::do_completion_impl,
|
|
&receive_operation<
|
|
MutableBufferSequence, Handler>::destroy_impl),
|
|
protocol_type_(protocol_type),
|
|
work_(io_service.get_io_service()),
|
|
cancel_token_(cancel_token),
|
|
buffers_(buffers),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
private:
|
|
static void do_completion_impl(operation* op,
|
|
DWORD last_error, size_t bytes_transferred)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef receive_operation<MutableBufferSequence, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
#if defined(ASIO_ENABLE_BUFFER_DEBUGGING)
|
|
// Check whether buffers are still valid.
|
|
typename MutableBufferSequence::const_iterator iter
|
|
= handler_op->buffers_.begin();
|
|
typename MutableBufferSequence::const_iterator end
|
|
= handler_op->buffers_.end();
|
|
while (iter != end)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
asio::buffer_cast<char*>(buffer);
|
|
++iter;
|
|
}
|
|
#endif // defined(ASIO_ENABLE_BUFFER_DEBUGGING)
|
|
|
|
// Map non-portable errors to their portable counterparts.
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
if (ec.value() == ERROR_NETNAME_DELETED)
|
|
{
|
|
if (handler_op->cancel_token_.expired())
|
|
ec = asio::error::operation_aborted;
|
|
else
|
|
ec = asio::error::connection_reset;
|
|
}
|
|
else if (ec.value() == ERROR_PORT_UNREACHABLE)
|
|
{
|
|
ec = asio::error::connection_refused;
|
|
}
|
|
|
|
// Check for connection closed.
|
|
else if (!ec && bytes_transferred == 0
|
|
&& handler_op->protocol_type_ == SOCK_STREAM
|
|
&& !boost::is_same<MutableBufferSequence, null_buffers>::value)
|
|
{
|
|
ec = asio::error::eof;
|
|
}
|
|
|
|
// Make a copy of the handler so that the memory can be deallocated before
|
|
// the upcall is made.
|
|
Handler handler(handler_op->handler_);
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
|
|
// Call the handler.
|
|
asio_handler_invoke_helpers::invoke(
|
|
detail::bind_handler(handler, ec, bytes_transferred), &handler);
|
|
}
|
|
|
|
static void destroy_impl(operation* op)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef receive_operation<MutableBufferSequence, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
// A sub-object of the handler may be the true owner of the memory
|
|
// associated with the handler. Consequently, a local copy of the handler
|
|
// is required to ensure that any owning sub-object remains valid until
|
|
// after we have deallocated the memory here.
|
|
Handler handler(handler_op->handler_);
|
|
(void)handler;
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
}
|
|
|
|
int protocol_type_;
|
|
asio::io_service::work work_;
|
|
weak_cancel_token_type cancel_token_;
|
|
MutableBufferSequence buffers_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// Start an asynchronous receive. The buffer for the data being received
|
|
// must be valid for the lifetime of the asynchronous operation.
|
|
template <typename MutableBufferSequence, typename Handler>
|
|
void async_receive(implementation_type& impl,
|
|
const MutableBufferSequence& buffers,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
return;
|
|
}
|
|
|
|
#if defined(ASIO_ENABLE_CANCELIO)
|
|
// Update the ID of the thread from which cancellation is safe.
|
|
if (impl.safe_cancellation_thread_id_ == 0)
|
|
impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
|
|
else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
|
|
impl.safe_cancellation_thread_id_ = ~DWORD(0);
|
|
#endif // defined(ASIO_ENABLE_CANCELIO)
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef receive_operation<MutableBufferSequence, Handler> value_type;
|
|
typedef handler_alloc_traits<Handler, value_type> alloc_traits;
|
|
raw_handler_ptr<alloc_traits> raw_ptr(handler);
|
|
int protocol_type = impl.protocol_.type();
|
|
handler_ptr<alloc_traits> ptr(raw_ptr, protocol_type,
|
|
iocp_service_, impl.cancel_token_, buffers, handler);
|
|
|
|
// Copy buffers into WSABUF array.
|
|
::WSABUF bufs[max_buffers];
|
|
typename MutableBufferSequence::const_iterator iter = buffers.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers.end();
|
|
DWORD i = 0;
|
|
size_t total_buffer_size = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
bufs[i].len = static_cast<u_long>(asio::buffer_size(buffer));
|
|
bufs[i].buf = asio::buffer_cast<char*>(buffer);
|
|
total_buffer_size += asio::buffer_size(buffer);
|
|
}
|
|
|
|
// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
|
|
{
|
|
asio::io_service::work work(this->get_io_service());
|
|
ptr.reset();
|
|
asio::error_code error;
|
|
iocp_service_.post(bind_handler(handler, error, 0));
|
|
return;
|
|
}
|
|
|
|
// Receive some data.
|
|
DWORD bytes_transferred = 0;
|
|
DWORD recv_flags = flags;
|
|
int result = ::WSARecv(impl.socket_, bufs, i,
|
|
&bytes_transferred, &recv_flags, ptr.get(), 0);
|
|
DWORD last_error = ::WSAGetLastError();
|
|
if (result != 0 && last_error != WSA_IO_PENDING)
|
|
{
|
|
asio::io_service::work work(this->get_io_service());
|
|
ptr.reset();
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
|
|
}
|
|
else
|
|
{
|
|
ptr.release();
|
|
}
|
|
}
|
|
|
|
// Wait until data can be received without blocking.
|
|
template <typename Handler>
|
|
void async_receive(implementation_type& impl, const null_buffers& buffers,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else if (impl.protocol_.type() == SOCK_STREAM)
|
|
{
|
|
// For stream sockets on Windows, we may issue a 0-byte overlapped
|
|
// WSARecv to wait until there is data available on the socket.
|
|
|
|
#if defined(ASIO_ENABLE_CANCELIO)
|
|
// Update the ID of the thread from which cancellation is safe.
|
|
if (impl.safe_cancellation_thread_id_ == 0)
|
|
impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
|
|
else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
|
|
impl.safe_cancellation_thread_id_ = ~DWORD(0);
|
|
#endif // defined(ASIO_ENABLE_CANCELIO)
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef receive_operation<null_buffers, Handler> value_type;
|
|
typedef handler_alloc_traits<Handler, value_type> alloc_traits;
|
|
raw_handler_ptr<alloc_traits> raw_ptr(handler);
|
|
int protocol_type = impl.protocol_.type();
|
|
handler_ptr<alloc_traits> ptr(raw_ptr, protocol_type,
|
|
iocp_service_, impl.cancel_token_, buffers, handler);
|
|
|
|
// Issue a receive operation with an empty buffer.
|
|
::WSABUF buf = { 0, 0 };
|
|
DWORD bytes_transferred = 0;
|
|
DWORD recv_flags = flags;
|
|
int result = ::WSARecv(impl.socket_, &buf, 1,
|
|
&bytes_transferred, &recv_flags, ptr.get(), 0);
|
|
DWORD last_error = ::WSAGetLastError();
|
|
if (result != 0 && last_error != WSA_IO_PENDING)
|
|
{
|
|
asio::io_service::work work(this->get_io_service());
|
|
ptr.reset();
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
|
|
}
|
|
else
|
|
{
|
|
ptr.release();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Check if the reactor was already obtained from the io_service.
|
|
reactor_type* reactor = static_cast<reactor_type*>(
|
|
interlocked_compare_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), 0, 0));
|
|
if (!reactor)
|
|
{
|
|
reactor = &(asio::use_service<reactor_type>(
|
|
this->get_io_service()));
|
|
interlocked_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), reactor);
|
|
}
|
|
|
|
if (flags & socket_base::message_out_of_band)
|
|
{
|
|
reactor->start_except_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler));
|
|
}
|
|
else
|
|
{
|
|
reactor->start_read_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler),
|
|
false);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Copy buffers into WSABUF array.
|
|
::WSABUF bufs[max_buffers];
|
|
typename MutableBufferSequence::const_iterator iter = buffers.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers.end();
|
|
DWORD i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
bufs[i].len = static_cast<u_long>(asio::buffer_size(buffer));
|
|
bufs[i].buf = asio::buffer_cast<char*>(buffer);
|
|
}
|
|
|
|
// Receive some data.
|
|
DWORD bytes_transferred = 0;
|
|
DWORD recv_flags = flags;
|
|
int endpoint_size = static_cast<int>(sender_endpoint.capacity());
|
|
int result = ::WSARecvFrom(impl.socket_, bufs, i, &bytes_transferred,
|
|
&recv_flags, sender_endpoint.data(), &endpoint_size, 0, 0);
|
|
if (result != 0)
|
|
{
|
|
DWORD last_error = ::WSAGetLastError();
|
|
if (last_error == ERROR_PORT_UNREACHABLE)
|
|
last_error = WSAECONNREFUSED;
|
|
ec = asio::error_code(last_error,
|
|
asio::error::get_system_category());
|
|
return 0;
|
|
}
|
|
if (bytes_transferred == 0 && impl.protocol_.type() == SOCK_STREAM)
|
|
{
|
|
ec = asio::error::eof;
|
|
return 0;
|
|
}
|
|
|
|
sender_endpoint.resize(static_cast<std::size_t>(endpoint_size));
|
|
|
|
ec = asio::error_code();
|
|
return bytes_transferred;
|
|
}
|
|
|
|
// 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)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_read(impl.socket_, ec);
|
|
|
|
// Reset endpoint since it can be given no sensible value at this time.
|
|
sender_endpoint = endpoint_type();
|
|
|
|
return 0;
|
|
}
|
|
|
|
template <typename MutableBufferSequence, typename Handler>
|
|
class receive_from_operation
|
|
: public operation
|
|
{
|
|
public:
|
|
receive_from_operation(int protocol_type, win_iocp_io_service& io_service,
|
|
endpoint_type& endpoint, const MutableBufferSequence& buffers,
|
|
Handler handler)
|
|
: operation(io_service,
|
|
&receive_from_operation<
|
|
MutableBufferSequence, Handler>::do_completion_impl,
|
|
&receive_from_operation<
|
|
MutableBufferSequence, Handler>::destroy_impl),
|
|
protocol_type_(protocol_type),
|
|
endpoint_(endpoint),
|
|
endpoint_size_(static_cast<int>(endpoint.capacity())),
|
|
work_(io_service.get_io_service()),
|
|
buffers_(buffers),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
int& endpoint_size()
|
|
{
|
|
return endpoint_size_;
|
|
}
|
|
|
|
private:
|
|
static void do_completion_impl(operation* op,
|
|
DWORD last_error, size_t bytes_transferred)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef receive_from_operation<MutableBufferSequence, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
#if defined(ASIO_ENABLE_BUFFER_DEBUGGING)
|
|
// Check whether buffers are still valid.
|
|
typename MutableBufferSequence::const_iterator iter
|
|
= handler_op->buffers_.begin();
|
|
typename MutableBufferSequence::const_iterator end
|
|
= handler_op->buffers_.end();
|
|
while (iter != end)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
asio::buffer_cast<char*>(buffer);
|
|
++iter;
|
|
}
|
|
#endif // defined(ASIO_ENABLE_BUFFER_DEBUGGING)
|
|
|
|
// Map non-portable errors to their portable counterparts.
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
if (ec.value() == ERROR_PORT_UNREACHABLE)
|
|
{
|
|
ec = asio::error::connection_refused;
|
|
}
|
|
|
|
// Check for connection closed.
|
|
if (!ec && bytes_transferred == 0
|
|
&& handler_op->protocol_type_ == SOCK_STREAM)
|
|
{
|
|
ec = asio::error::eof;
|
|
}
|
|
|
|
// Record the size of the endpoint returned by the operation.
|
|
handler_op->endpoint_.resize(handler_op->endpoint_size_);
|
|
|
|
// Make a copy of the handler so that the memory can be deallocated before
|
|
// the upcall is made.
|
|
Handler handler(handler_op->handler_);
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
|
|
// Call the handler.
|
|
asio_handler_invoke_helpers::invoke(
|
|
detail::bind_handler(handler, ec, bytes_transferred), &handler);
|
|
}
|
|
|
|
static void destroy_impl(operation* op)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef receive_from_operation<MutableBufferSequence, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
// A sub-object of the handler may be the true owner of the memory
|
|
// associated with the handler. Consequently, a local copy of the handler
|
|
// is required to ensure that any owning sub-object remains valid until
|
|
// after we have deallocated the memory here.
|
|
Handler handler(handler_op->handler_);
|
|
(void)handler;
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
}
|
|
|
|
int protocol_type_;
|
|
endpoint_type& endpoint_;
|
|
int endpoint_size_;
|
|
asio::io_service::work work_;
|
|
MutableBufferSequence buffers_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// 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_endp,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
return;
|
|
}
|
|
|
|
#if defined(ASIO_ENABLE_CANCELIO)
|
|
// Update the ID of the thread from which cancellation is safe.
|
|
if (impl.safe_cancellation_thread_id_ == 0)
|
|
impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
|
|
else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
|
|
impl.safe_cancellation_thread_id_ = ~DWORD(0);
|
|
#endif // defined(ASIO_ENABLE_CANCELIO)
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef receive_from_operation<MutableBufferSequence, Handler> value_type;
|
|
typedef handler_alloc_traits<Handler, value_type> alloc_traits;
|
|
raw_handler_ptr<alloc_traits> raw_ptr(handler);
|
|
int protocol_type = impl.protocol_.type();
|
|
handler_ptr<alloc_traits> ptr(raw_ptr, protocol_type,
|
|
iocp_service_, sender_endp, buffers, handler);
|
|
|
|
// Copy buffers into WSABUF array.
|
|
::WSABUF bufs[max_buffers];
|
|
typename MutableBufferSequence::const_iterator iter = buffers.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers.end();
|
|
DWORD i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
bufs[i].len = static_cast<u_long>(asio::buffer_size(buffer));
|
|
bufs[i].buf = asio::buffer_cast<char*>(buffer);
|
|
}
|
|
|
|
// Receive some data.
|
|
DWORD bytes_transferred = 0;
|
|
DWORD recv_flags = flags;
|
|
int result = ::WSARecvFrom(impl.socket_, bufs, i, &bytes_transferred,
|
|
&recv_flags, sender_endp.data(), &ptr.get()->endpoint_size(),
|
|
ptr.get(), 0);
|
|
DWORD last_error = ::WSAGetLastError();
|
|
if (result != 0 && last_error != WSA_IO_PENDING)
|
|
{
|
|
asio::io_service::work work(this->get_io_service());
|
|
ptr.reset();
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
|
|
}
|
|
else
|
|
{
|
|
ptr.release();
|
|
}
|
|
}
|
|
|
|
// 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)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
// Check if the reactor was already obtained from the io_service.
|
|
reactor_type* reactor = static_cast<reactor_type*>(
|
|
interlocked_compare_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), 0, 0));
|
|
if (!reactor)
|
|
{
|
|
reactor = &(asio::use_service<reactor_type>(
|
|
this->get_io_service()));
|
|
interlocked_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), reactor);
|
|
}
|
|
|
|
// Reset endpoint since it can be given no sensible value at this time.
|
|
sender_endpoint = endpoint_type();
|
|
|
|
if (flags & socket_base::message_out_of_band)
|
|
{
|
|
reactor->start_except_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler));
|
|
}
|
|
else
|
|
{
|
|
reactor->start_read_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler),
|
|
false);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Accept a new connection.
|
|
template <typename Socket>
|
|
asio::error_code accept(implementation_type& impl, Socket& peer,
|
|
endpoint_type* peer_endpoint, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return ec;
|
|
}
|
|
|
|
// We cannot accept a socket that is already open.
|
|
if (peer.is_open())
|
|
{
|
|
ec = asio::error::already_open;
|
|
return ec;
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
socket_holder new_socket;
|
|
std::size_t addr_len = 0;
|
|
if (peer_endpoint)
|
|
{
|
|
addr_len = peer_endpoint->capacity();
|
|
new_socket.reset(socket_ops::accept(impl.socket_,
|
|
peer_endpoint->data(), &addr_len, ec));
|
|
}
|
|
else
|
|
{
|
|
new_socket.reset(socket_ops::accept(impl.socket_, 0, 0, ec));
|
|
}
|
|
|
|
if (ec)
|
|
{
|
|
if (ec == asio::error::connection_aborted
|
|
&& !(impl.flags_ & implementation_type::enable_connection_aborted))
|
|
{
|
|
// Retry accept operation.
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
return ec;
|
|
}
|
|
}
|
|
|
|
if (peer_endpoint)
|
|
peer_endpoint->resize(addr_len);
|
|
|
|
peer.assign(impl.protocol_, new_socket.get(), ec);
|
|
if (!ec)
|
|
new_socket.release();
|
|
return ec;
|
|
}
|
|
}
|
|
|
|
template <typename Socket, typename Handler>
|
|
class accept_operation
|
|
: public operation
|
|
{
|
|
public:
|
|
accept_operation(win_iocp_io_service& io_service,
|
|
socket_type socket, socket_type new_socket, Socket& peer,
|
|
const protocol_type& protocol, endpoint_type* peer_endpoint,
|
|
bool enable_connection_aborted, Handler handler)
|
|
: operation(io_service,
|
|
&accept_operation<Socket, Handler>::do_completion_impl,
|
|
&accept_operation<Socket, Handler>::destroy_impl),
|
|
io_service_(io_service),
|
|
socket_(socket),
|
|
new_socket_(new_socket),
|
|
peer_(peer),
|
|
protocol_(protocol),
|
|
peer_endpoint_(peer_endpoint),
|
|
work_(io_service.get_io_service()),
|
|
enable_connection_aborted_(enable_connection_aborted),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
socket_type new_socket()
|
|
{
|
|
return new_socket_.get();
|
|
}
|
|
|
|
void* output_buffer()
|
|
{
|
|
return output_buffer_;
|
|
}
|
|
|
|
DWORD address_length()
|
|
{
|
|
return sizeof(sockaddr_storage_type) + 16;
|
|
}
|
|
|
|
private:
|
|
static void do_completion_impl(operation* op, DWORD last_error, size_t)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef accept_operation<Socket, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
// Map Windows error ERROR_NETNAME_DELETED to connection_aborted.
|
|
if (last_error == ERROR_NETNAME_DELETED)
|
|
{
|
|
last_error = WSAECONNABORTED;
|
|
}
|
|
|
|
// Restart the accept operation if we got the connection_aborted error
|
|
// and the enable_connection_aborted socket option is not set.
|
|
if (last_error == WSAECONNABORTED
|
|
&& !ptr.get()->enable_connection_aborted_)
|
|
{
|
|
// Reset OVERLAPPED structure.
|
|
ptr.get()->Internal = 0;
|
|
ptr.get()->InternalHigh = 0;
|
|
ptr.get()->Offset = 0;
|
|
ptr.get()->OffsetHigh = 0;
|
|
ptr.get()->hEvent = 0;
|
|
|
|
// Create a new socket for the next connection, since the AcceptEx call
|
|
// fails with WSAEINVAL if we try to reuse the same socket.
|
|
asio::error_code ec;
|
|
ptr.get()->new_socket_.reset();
|
|
ptr.get()->new_socket_.reset(socket_ops::socket(
|
|
ptr.get()->protocol_.family(), ptr.get()->protocol_.type(),
|
|
ptr.get()->protocol_.protocol(), ec));
|
|
if (ptr.get()->new_socket() != invalid_socket)
|
|
{
|
|
// Accept a connection.
|
|
DWORD bytes_read = 0;
|
|
BOOL result = ::AcceptEx(ptr.get()->socket_, ptr.get()->new_socket(),
|
|
ptr.get()->output_buffer(), 0, ptr.get()->address_length(),
|
|
ptr.get()->address_length(), &bytes_read, ptr.get());
|
|
last_error = ::WSAGetLastError();
|
|
|
|
// Check if the operation completed immediately.
|
|
if (!result && last_error != WSA_IO_PENDING)
|
|
{
|
|
if (last_error == ERROR_NETNAME_DELETED
|
|
|| last_error == WSAECONNABORTED)
|
|
{
|
|
// Post this handler so that operation will be restarted again.
|
|
ptr.get()->io_service_.post_completion(ptr.get(), last_error, 0);
|
|
ptr.release();
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
// Operation already complete. Continue with rest of this handler.
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Asynchronous operation has been successfully restarted.
|
|
ptr.release();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Get the address of the peer.
|
|
endpoint_type peer_endpoint;
|
|
if (last_error == 0)
|
|
{
|
|
LPSOCKADDR local_addr = 0;
|
|
int local_addr_length = 0;
|
|
LPSOCKADDR remote_addr = 0;
|
|
int remote_addr_length = 0;
|
|
GetAcceptExSockaddrs(handler_op->output_buffer(), 0,
|
|
handler_op->address_length(), handler_op->address_length(),
|
|
&local_addr, &local_addr_length, &remote_addr, &remote_addr_length);
|
|
if (static_cast<std::size_t>(remote_addr_length)
|
|
> peer_endpoint.capacity())
|
|
{
|
|
last_error = WSAEINVAL;
|
|
}
|
|
else
|
|
{
|
|
using namespace std; // For memcpy.
|
|
memcpy(peer_endpoint.data(), remote_addr, remote_addr_length);
|
|
peer_endpoint.resize(static_cast<std::size_t>(remote_addr_length));
|
|
}
|
|
}
|
|
|
|
// Need to set the SO_UPDATE_ACCEPT_CONTEXT option so that getsockname
|
|
// and getpeername will work on the accepted socket.
|
|
if (last_error == 0)
|
|
{
|
|
SOCKET update_ctx_param = handler_op->socket_;
|
|
asio::error_code ec;
|
|
if (socket_ops::setsockopt(handler_op->new_socket_.get(),
|
|
SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT,
|
|
&update_ctx_param, sizeof(SOCKET), ec) != 0)
|
|
{
|
|
last_error = ec.value();
|
|
}
|
|
}
|
|
|
|
// If the socket was successfully accepted, transfer ownership of the
|
|
// socket to the peer object.
|
|
if (last_error == 0)
|
|
{
|
|
asio::error_code ec;
|
|
handler_op->peer_.assign(handler_op->protocol_,
|
|
native_type(handler_op->new_socket_.get(), peer_endpoint), ec);
|
|
if (ec)
|
|
last_error = ec.value();
|
|
else
|
|
handler_op->new_socket_.release();
|
|
}
|
|
|
|
// Pass endpoint back to caller.
|
|
if (handler_op->peer_endpoint_)
|
|
*handler_op->peer_endpoint_ = peer_endpoint;
|
|
|
|
// Make a copy of the handler so that the memory can be deallocated before
|
|
// the upcall is made.
|
|
Handler handler(handler_op->handler_);
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
|
|
// Call the handler.
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
asio_handler_invoke_helpers::invoke(
|
|
detail::bind_handler(handler, ec), &handler);
|
|
}
|
|
|
|
static void destroy_impl(operation* op)
|
|
{
|
|
// Take ownership of the operation object.
|
|
typedef accept_operation<Socket, Handler> op_type;
|
|
op_type* handler_op(static_cast<op_type*>(op));
|
|
typedef handler_alloc_traits<Handler, op_type> alloc_traits;
|
|
handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
|
|
|
|
// A sub-object of the handler may be the true owner of the memory
|
|
// associated with the handler. Consequently, a local copy of the handler
|
|
// is required to ensure that any owning sub-object remains valid until
|
|
// after we have deallocated the memory here.
|
|
Handler handler(handler_op->handler_);
|
|
(void)handler;
|
|
|
|
// Free the memory associated with the handler.
|
|
ptr.reset();
|
|
}
|
|
|
|
win_iocp_io_service& io_service_;
|
|
socket_type socket_;
|
|
socket_holder new_socket_;
|
|
Socket& peer_;
|
|
protocol_type protocol_;
|
|
endpoint_type* peer_endpoint_;
|
|
asio::io_service::work work_;
|
|
unsigned char output_buffer_[(sizeof(sockaddr_storage_type) + 16) * 2];
|
|
bool enable_connection_aborted_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// 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)
|
|
{
|
|
// Check whether acceptor has been initialised.
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor));
|
|
return;
|
|
}
|
|
|
|
// Check that peer socket has not already been opened.
|
|
if (peer.is_open())
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::already_open));
|
|
return;
|
|
}
|
|
|
|
#if defined(ASIO_ENABLE_CANCELIO)
|
|
// Update the ID of the thread from which cancellation is safe.
|
|
if (impl.safe_cancellation_thread_id_ == 0)
|
|
impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
|
|
else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
|
|
impl.safe_cancellation_thread_id_ = ~DWORD(0);
|
|
#endif // defined(ASIO_ENABLE_CANCELIO)
|
|
|
|
// Create a new socket for the connection.
|
|
asio::error_code ec;
|
|
socket_holder sock(socket_ops::socket(impl.protocol_.family(),
|
|
impl.protocol_.type(), impl.protocol_.protocol(), ec));
|
|
if (sock.get() == invalid_socket)
|
|
{
|
|
this->get_io_service().post(bind_handler(handler, ec));
|
|
return;
|
|
}
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef accept_operation<Socket, Handler> value_type;
|
|
typedef handler_alloc_traits<Handler, value_type> alloc_traits;
|
|
raw_handler_ptr<alloc_traits> raw_ptr(handler);
|
|
socket_type new_socket = sock.get();
|
|
bool enable_connection_aborted =
|
|
(impl.flags_ & implementation_type::enable_connection_aborted);
|
|
handler_ptr<alloc_traits> ptr(raw_ptr,
|
|
iocp_service_, impl.socket_, new_socket, peer, impl.protocol_,
|
|
peer_endpoint, enable_connection_aborted, handler);
|
|
sock.release();
|
|
|
|
// Accept a connection.
|
|
DWORD bytes_read = 0;
|
|
BOOL result = ::AcceptEx(impl.socket_, ptr.get()->new_socket(),
|
|
ptr.get()->output_buffer(), 0, ptr.get()->address_length(),
|
|
ptr.get()->address_length(), &bytes_read, ptr.get());
|
|
DWORD last_error = ::WSAGetLastError();
|
|
|
|
// Check if the operation completed immediately.
|
|
if (!result && last_error != WSA_IO_PENDING)
|
|
{
|
|
if (!enable_connection_aborted
|
|
&& (last_error == ERROR_NETNAME_DELETED
|
|
|| last_error == WSAECONNABORTED))
|
|
{
|
|
// Post handler so that operation will be restarted again. We do not
|
|
// perform the AcceptEx again here to avoid the possibility of starving
|
|
// other handlers.
|
|
iocp_service_.post_completion(ptr.get(), last_error, 0);
|
|
ptr.release();
|
|
}
|
|
else
|
|
{
|
|
asio::io_service::work work(this->get_io_service());
|
|
ptr.reset();
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
iocp_service_.post(bind_handler(handler, ec));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ptr.release();
|
|
}
|
|
}
|
|
|
|
// Connect the socket to the specified endpoint.
|
|
asio::error_code connect(implementation_type& impl,
|
|
const endpoint_type& peer_endpoint, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return ec;
|
|
}
|
|
|
|
// Perform the connect operation.
|
|
socket_ops::connect(impl.socket_,
|
|
peer_endpoint.data(), peer_endpoint.size(), ec);
|
|
return ec;
|
|
}
|
|
|
|
template <typename Handler>
|
|
class connect_operation
|
|
{
|
|
public:
|
|
connect_operation(socket_type socket, bool user_set_non_blocking,
|
|
asio::io_service& io_service, Handler handler)
|
|
: socket_(socket),
|
|
user_set_non_blocking_(user_set_non_blocking),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code& ec,
|
|
std::size_t& bytes_transferred)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (ec)
|
|
return true;
|
|
|
|
// Get the error code from the connect operation.
|
|
int connect_error = 0;
|
|
size_t connect_error_len = sizeof(connect_error);
|
|
if (socket_ops::getsockopt(socket_, SOL_SOCKET, SO_ERROR,
|
|
&connect_error, &connect_error_len, ec) == socket_error_retval)
|
|
return true;
|
|
|
|
// If connection failed then post the handler with the error code.
|
|
if (connect_error)
|
|
{
|
|
ec = asio::error_code(connect_error,
|
|
asio::error::get_system_category());
|
|
return true;
|
|
}
|
|
|
|
// Revert socket to blocking mode unless the user requested otherwise.
|
|
if (!user_set_non_blocking_)
|
|
{
|
|
ioctl_arg_type non_blocking = 0;
|
|
if (socket_ops::ioctl(socket_, FIONBIO, &non_blocking, ec))
|
|
return true;
|
|
}
|
|
|
|
// Post the result of the successful connection operation.
|
|
ec = asio::error_code();
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec, std::size_t)
|
|
{
|
|
io_service_.post(bind_handler(handler_, ec));
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
bool user_set_non_blocking_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// Start an asynchronous connect.
|
|
template <typename Handler>
|
|
void async_connect(implementation_type& impl,
|
|
const endpoint_type& peer_endpoint, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor));
|
|
return;
|
|
}
|
|
|
|
#if defined(ASIO_ENABLE_CANCELIO)
|
|
// Update the ID of the thread from which cancellation is safe.
|
|
if (impl.safe_cancellation_thread_id_ == 0)
|
|
impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
|
|
else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
|
|
impl.safe_cancellation_thread_id_ = ~DWORD(0);
|
|
#endif // defined(ASIO_ENABLE_CANCELIO)
|
|
|
|
// Check if the reactor was already obtained from the io_service.
|
|
reactor_type* reactor = static_cast<reactor_type*>(
|
|
interlocked_compare_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), 0, 0));
|
|
if (!reactor)
|
|
{
|
|
reactor = &(asio::use_service<reactor_type>(
|
|
this->get_io_service()));
|
|
interlocked_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), reactor);
|
|
}
|
|
|
|
// Mark the socket as non-blocking so that the connection will take place
|
|
// asynchronously.
|
|
ioctl_arg_type non_blocking = 1;
|
|
asio::error_code ec;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler, ec));
|
|
return;
|
|
}
|
|
|
|
// Start the connect operation.
|
|
if (socket_ops::connect(impl.socket_, peer_endpoint.data(),
|
|
peer_endpoint.size(), ec) == 0)
|
|
{
|
|
// Revert socket to blocking mode unless the user requested otherwise.
|
|
if (!(impl.flags_ & implementation_type::user_set_non_blocking))
|
|
{
|
|
non_blocking = 0;
|
|
socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec);
|
|
}
|
|
|
|
// The connect operation has finished successfully so we need to post the
|
|
// handler immediately.
|
|
this->get_io_service().post(bind_handler(handler, ec));
|
|
}
|
|
else if (ec == asio::error::in_progress
|
|
|| ec == asio::error::would_block)
|
|
{
|
|
// The connection is happening in the background, and we need to wait
|
|
// until the socket becomes writeable.
|
|
boost::shared_ptr<bool> completed(new bool(false));
|
|
reactor->start_connect_op(impl.socket_, impl.reactor_data_,
|
|
connect_operation<Handler>(
|
|
impl.socket_,
|
|
(impl.flags_ & implementation_type::user_set_non_blocking) != 0,
|
|
this->get_io_service(), handler));
|
|
}
|
|
else
|
|
{
|
|
// Revert socket to blocking mode unless the user requested otherwise.
|
|
if (!(impl.flags_ & implementation_type::user_set_non_blocking))
|
|
{
|
|
non_blocking = 0;
|
|
asio::error_code ignored_ec;
|
|
socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ignored_ec);
|
|
}
|
|
|
|
// The connect operation has failed, so post the handler immediately.
|
|
this->get_io_service().post(bind_handler(handler, ec));
|
|
}
|
|
}
|
|
|
|
private:
|
|
// Helper function to close a socket when the associated object is being
|
|
// destroyed.
|
|
void close_for_destruction(implementation_type& impl)
|
|
{
|
|
if (is_open(impl))
|
|
{
|
|
// Check if the reactor was created, in which case we need to close the
|
|
// socket on the reactor as well to cancel any operations that might be
|
|
// running there.
|
|
reactor_type* reactor = static_cast<reactor_type*>(
|
|
interlocked_compare_exchange_pointer(
|
|
reinterpret_cast<void**>(&reactor_), 0, 0));
|
|
if (reactor)
|
|
reactor->close_descriptor(impl.socket_, impl.reactor_data_);
|
|
|
|
// The socket destructor must not block. If the user has changed the
|
|
// linger option to block in the foreground, we will change it back to the
|
|
// default so that the closure is performed in the background.
|
|
if (impl.flags_ & implementation_type::close_might_block)
|
|
{
|
|
::linger opt;
|
|
opt.l_onoff = 0;
|
|
opt.l_linger = 0;
|
|
asio::error_code ignored_ec;
|
|
socket_ops::setsockopt(impl.socket_,
|
|
SOL_SOCKET, SO_LINGER, &opt, sizeof(opt), ignored_ec);
|
|
}
|
|
|
|
asio::error_code ignored_ec;
|
|
socket_ops::close(impl.socket_, ignored_ec);
|
|
impl.socket_ = invalid_socket;
|
|
impl.flags_ = 0;
|
|
impl.cancel_token_.reset();
|
|
#if defined(ASIO_ENABLE_CANCELIO)
|
|
impl.safe_cancellation_thread_id_ = 0;
|
|
#endif // defined(ASIO_ENABLE_CANCELIO)
|
|
}
|
|
}
|
|
|
|
// Helper function to emulate InterlockedCompareExchangePointer functionality
|
|
// for:
|
|
// - very old Platform SDKs; and
|
|
// - platform SDKs where MSVC's /Wp64 option causes spurious warnings.
|
|
void* interlocked_compare_exchange_pointer(void** dest, void* exch, void* cmp)
|
|
{
|
|
#if defined(_M_IX86)
|
|
return reinterpret_cast<void*>(InterlockedCompareExchange(
|
|
reinterpret_cast<PLONG>(dest), reinterpret_cast<LONG>(exch),
|
|
reinterpret_cast<LONG>(cmp)));
|
|
#else
|
|
return InterlockedCompareExchangePointer(dest, exch, cmp);
|
|
#endif
|
|
}
|
|
|
|
// Helper function to emulate InterlockedExchangePointer functionality for:
|
|
// - very old Platform SDKs; and
|
|
// - platform SDKs where MSVC's /Wp64 option causes spurious warnings.
|
|
void* interlocked_exchange_pointer(void** dest, void* val)
|
|
{
|
|
#if defined(_M_IX86)
|
|
return reinterpret_cast<void*>(InterlockedExchange(
|
|
reinterpret_cast<PLONG>(dest), reinterpret_cast<LONG>(val)));
|
|
#else
|
|
return InterlockedExchangePointer(dest, val);
|
|
#endif
|
|
}
|
|
|
|
// The IOCP service used for running asynchronous operations and dispatching
|
|
// handlers.
|
|
win_iocp_io_service& iocp_service_;
|
|
|
|
// The reactor used for performing connect operations. This object is created
|
|
// only if needed.
|
|
reactor_type* reactor_;
|
|
|
|
// Mutex to protect access to the linked list of implementations.
|
|
asio::detail::mutex mutex_;
|
|
|
|
// The head of a linked list of all implementations.
|
|
implementation_type* impl_list_;
|
|
};
|
|
|
|
} // namespace detail
|
|
} // namespace asio
|
|
|
|
#endif // defined(ASIO_HAS_IOCP)
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // ASIO_DETAIL_WIN_IOCP_SOCKET_SERVICE_HPP
|