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+//
+// detail/win_iocp_socket_accept_op.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef ASIO_DETAIL_WIN_IOCP_SOCKET_ACCEPT_OP_HPP
+#define ASIO_DETAIL_WIN_IOCP_SOCKET_ACCEPT_OP_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#if defined(ASIO_HAS_IOCP)
+
+#include "asio/detail/bind_handler.hpp"
+#include "asio/detail/buffer_sequence_adapter.hpp"
+#include "asio/detail/fenced_block.hpp"
+#include "asio/detail/handler_alloc_helpers.hpp"
+#include "asio/detail/handler_invoke_helpers.hpp"
+#include "asio/detail/memory.hpp"
+#include "asio/detail/operation.hpp"
+#include "asio/detail/socket_ops.hpp"
+#include "asio/detail/win_iocp_socket_service_base.hpp"
+#include "asio/error.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+template <typename Socket, typename Protocol, typename Handler>
+class win_iocp_socket_accept_op : public operation
+{
+public:
+ ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_accept_op);
+
+ win_iocp_socket_accept_op(win_iocp_socket_service_base& socket_service,
+ socket_type socket, Socket& peer, const Protocol& protocol,
+ typename Protocol::endpoint* peer_endpoint,
+ bool enable_connection_aborted, Handler& handler)
+ : operation(&win_iocp_socket_accept_op::do_complete),
+ socket_service_(socket_service),
+ socket_(socket),
+ peer_(peer),
+ protocol_(protocol),
+ peer_endpoint_(peer_endpoint),
+ enable_connection_aborted_(enable_connection_aborted),
+ handler_(ASIO_MOVE_CAST(Handler)(handler))
+ {
+ handler_work<Handler>::start(handler_);
+ }
+
+ socket_holder& new_socket()
+ {
+ return new_socket_;
+ }
+
+ void* output_buffer()
+ {
+ return output_buffer_;
+ }
+
+ DWORD address_length()
+ {
+ return sizeof(sockaddr_storage_type) + 16;
+ }
+
+ static void do_complete(void* owner, operation* base,
+ const asio::error_code& result_ec,
+ std::size_t /*bytes_transferred*/)
+ {
+ asio::error_code ec(result_ec);
+
+ // Take ownership of the operation object.
+ win_iocp_socket_accept_op* o(static_cast<win_iocp_socket_accept_op*>(base));
+ ptr p = { asio::detail::addressof(o->handler_), o, o };
+ handler_work<Handler> w(o->handler_);
+
+ if (owner)
+ {
+ typename Protocol::endpoint peer_endpoint;
+ std::size_t addr_len = peer_endpoint.capacity();
+ socket_ops::complete_iocp_accept(o->socket_,
+ o->output_buffer(), o->address_length(),
+ peer_endpoint.data(), &addr_len,
+ o->new_socket_.get(), ec);
+
+ // Restart the accept operation if we got the connection_aborted error
+ // and the enable_connection_aborted socket option is not set.
+ if (ec == asio::error::connection_aborted
+ && !o->enable_connection_aborted_)
+ {
+ o->reset();
+ o->socket_service_.restart_accept_op(o->socket_,
+ o->new_socket_, o->protocol_.family(),
+ o->protocol_.type(), o->protocol_.protocol(),
+ o->output_buffer(), o->address_length(), o);
+ p.v = p.p = 0;
+ return;
+ }
+
+ // If the socket was successfully accepted, transfer ownership of the
+ // socket to the peer object.
+ if (!ec)
+ {
+ o->peer_.assign(o->protocol_,
+ typename Socket::native_handle_type(
+ o->new_socket_.get(), peer_endpoint), ec);
+ if (!ec)
+ o->new_socket_.release();
+ }
+
+ // Pass endpoint back to caller.
+ if (o->peer_endpoint_)
+ *o->peer_endpoint_ = peer_endpoint;
+ }
+
+ ASIO_HANDLER_COMPLETION((*o));
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made. Even if we're not about to make an upcall, 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.
+ detail::binder1<Handler, asio::error_code>
+ handler(o->handler_, ec);
+ p.h = asio::detail::addressof(handler.handler_);
+ p.reset();
+
+ // Make the upcall if required.
+ if (owner)
+ {
+ fenced_block b(fenced_block::half);
+ ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
+ w.complete(handler, handler.handler_);
+ ASIO_HANDLER_INVOCATION_END;
+ }
+ }
+
+private:
+ win_iocp_socket_service_base& socket_service_;
+ socket_type socket_;
+ socket_holder new_socket_;
+ Socket& peer_;
+ Protocol protocol_;
+ typename Protocol::endpoint* peer_endpoint_;
+ unsigned char output_buffer_[(sizeof(sockaddr_storage_type) + 16) * 2];
+ bool enable_connection_aborted_;
+ Handler handler_;
+};
+
+#if defined(ASIO_HAS_MOVE)
+
+template <typename Protocol, typename Handler>
+class win_iocp_socket_move_accept_op : public operation
+{
+public:
+ ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_move_accept_op);
+
+ win_iocp_socket_move_accept_op(
+ win_iocp_socket_service_base& socket_service, socket_type socket,
+ const Protocol& protocol, asio::io_context& peer_io_context,
+ typename Protocol::endpoint* peer_endpoint,
+ bool enable_connection_aborted, Handler& handler)
+ : operation(&win_iocp_socket_move_accept_op::do_complete),
+ socket_service_(socket_service),
+ socket_(socket),
+ peer_(peer_io_context),
+ protocol_(protocol),
+ peer_endpoint_(peer_endpoint),
+ enable_connection_aborted_(enable_connection_aborted),
+ handler_(ASIO_MOVE_CAST(Handler)(handler))
+ {
+ handler_work<Handler>::start(handler_);
+ }
+
+ socket_holder& new_socket()
+ {
+ return new_socket_;
+ }
+
+ void* output_buffer()
+ {
+ return output_buffer_;
+ }
+
+ DWORD address_length()
+ {
+ return sizeof(sockaddr_storage_type) + 16;
+ }
+
+ static void do_complete(void* owner, operation* base,
+ const asio::error_code& result_ec,
+ std::size_t /*bytes_transferred*/)
+ {
+ asio::error_code ec(result_ec);
+
+ // Take ownership of the operation object.
+ win_iocp_socket_move_accept_op* o(
+ static_cast<win_iocp_socket_move_accept_op*>(base));
+ ptr p = { asio::detail::addressof(o->handler_), o, o };
+ handler_work<Handler> w(o->handler_);
+
+ if (owner)
+ {
+ typename Protocol::endpoint peer_endpoint;
+ std::size_t addr_len = peer_endpoint.capacity();
+ socket_ops::complete_iocp_accept(o->socket_,
+ o->output_buffer(), o->address_length(),
+ peer_endpoint.data(), &addr_len,
+ o->new_socket_.get(), ec);
+
+ // Restart the accept operation if we got the connection_aborted error
+ // and the enable_connection_aborted socket option is not set.
+ if (ec == asio::error::connection_aborted
+ && !o->enable_connection_aborted_)
+ {
+ o->reset();
+ o->socket_service_.restart_accept_op(o->socket_,
+ o->new_socket_, o->protocol_.family(),
+ o->protocol_.type(), o->protocol_.protocol(),
+ o->output_buffer(), o->address_length(), o);
+ p.v = p.p = 0;
+ return;
+ }
+
+ // If the socket was successfully accepted, transfer ownership of the
+ // socket to the peer object.
+ if (!ec)
+ {
+ o->peer_.assign(o->protocol_,
+ typename Protocol::socket::native_handle_type(
+ o->new_socket_.get(), peer_endpoint), ec);
+ if (!ec)
+ o->new_socket_.release();
+ }
+
+ // Pass endpoint back to caller.
+ if (o->peer_endpoint_)
+ *o->peer_endpoint_ = peer_endpoint;
+ }
+
+ ASIO_HANDLER_COMPLETION((*o));
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made. Even if we're not about to make an upcall, 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.
+ detail::move_binder2<Handler,
+ asio::error_code, typename Protocol::socket>
+ handler(0, ASIO_MOVE_CAST(Handler)(o->handler_), ec,
+ ASIO_MOVE_CAST(typename Protocol::socket)(o->peer_));
+ p.h = asio::detail::addressof(handler.handler_);
+ p.reset();
+
+ // Make the upcall if required.
+ if (owner)
+ {
+ fenced_block b(fenced_block::half);
+ ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, "..."));
+ w.complete(handler, handler.handler_);
+ ASIO_HANDLER_INVOCATION_END;
+ }
+ }
+
+private:
+ win_iocp_socket_service_base& socket_service_;
+ socket_type socket_;
+ socket_holder new_socket_;
+ typename Protocol::socket peer_;
+ Protocol protocol_;
+ typename Protocol::endpoint* peer_endpoint_;
+ unsigned char output_buffer_[(sizeof(sockaddr_storage_type) + 16) * 2];
+ bool enable_connection_aborted_;
+ Handler handler_;
+};
+
+#endif // defined(ASIO_HAS_MOVE)
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // defined(ASIO_HAS_IOCP)
+
+#endif // ASIO_DETAIL_WIN_IOCP_SOCKET_ACCEPT_OP_HPP
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