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199 lines
5.4 KiB
199 lines
5.4 KiB
//
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// detail/winrt_resolver_service.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2016 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_WINRT_RESOLVER_SERVICE_HPP
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#define ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if defined(ASIO_WINDOWS_RUNTIME)
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#include "asio/ip/basic_resolver_query.hpp"
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#include "asio/ip/basic_resolver_results.hpp"
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#include "asio/detail/bind_handler.hpp"
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#include "asio/detail/memory.hpp"
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#include "asio/detail/socket_ops.hpp"
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#include "asio/detail/winrt_async_manager.hpp"
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#include "asio/detail/winrt_resolve_op.hpp"
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#include "asio/detail/winrt_utils.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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template <typename Protocol>
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class winrt_resolver_service :
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public service_base<winrt_resolver_service<Protocol> >
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{
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public:
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// The implementation type of the resolver. A cancellation token is used to
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// indicate to the asynchronous operation that the operation has been
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// cancelled.
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typedef socket_ops::shared_cancel_token_type implementation_type;
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// The endpoint type.
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typedef typename Protocol::endpoint endpoint_type;
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// The query type.
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typedef asio::ip::basic_resolver_query<Protocol> query_type;
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// The results type.
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typedef asio::ip::basic_resolver_results<Protocol> results_type;
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// Constructor.
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winrt_resolver_service(asio::io_context& io_context)
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: service_base<winrt_resolver_service<Protocol> >(io_context),
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io_context_(use_service<io_context_impl>(io_context)),
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async_manager_(use_service<winrt_async_manager>(io_context))
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{
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}
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// Destructor.
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~winrt_resolver_service()
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{
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}
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// Destroy all user-defined handler objects owned by the service.
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void shutdown()
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{
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}
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// Perform any fork-related housekeeping.
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void notify_fork(asio::io_context::fork_event)
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{
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}
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// Construct a new resolver implementation.
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void construct(implementation_type&)
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{
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}
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// Move-construct a new resolver implementation.
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void move_construct(implementation_type&,
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implementation_type&)
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{
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}
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// Move-assign from another resolver implementation.
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void move_assign(implementation_type&,
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winrt_resolver_service&, implementation_type&)
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{
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}
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// Destroy a resolver implementation.
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void destroy(implementation_type&)
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{
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}
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// Cancel pending asynchronous operations.
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void cancel(implementation_type&)
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{
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}
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// Resolve a query to a list of entries.
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results_type resolve(implementation_type&,
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const query_type& query, asio::error_code& ec)
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{
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try
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{
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using namespace Windows::Networking::Sockets;
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auto endpoint_pairs = async_manager_.sync(
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DatagramSocket::GetEndpointPairsAsync(
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winrt_utils::host_name(query.host_name()),
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winrt_utils::string(query.service_name())), ec);
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if (ec)
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return results_type();
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return results_type::create(
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endpoint_pairs, query.hints(),
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query.host_name(), query.service_name());
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}
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catch (Platform::Exception^ e)
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{
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ec = asio::error_code(e->HResult,
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asio::system_category());
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return results_type();
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}
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}
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// Asynchronously resolve a query to a list of entries.
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template <typename Handler>
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void async_resolve(implementation_type& impl,
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const query_type& query, Handler& handler)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef winrt_resolve_op<Protocol, Handler> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(query, handler);
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ASIO_HANDLER_CREATION((io_context_.context(),
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*p.p, "resolver", &impl, 0, "async_resolve"));
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(void)impl;
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try
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{
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using namespace Windows::Networking::Sockets;
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async_manager_.async(DatagramSocket::GetEndpointPairsAsync(
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winrt_utils::host_name(query.host_name()),
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winrt_utils::string(query.service_name())), p.p);
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p.v = p.p = 0;
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}
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catch (Platform::Exception^ e)
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{
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p.p->ec_ = asio::error_code(
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e->HResult, asio::system_category());
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io_context_.post_immediate_completion(p.p, is_continuation);
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p.v = p.p = 0;
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}
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}
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// Resolve an endpoint to a list of entries.
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results_type resolve(implementation_type&,
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const endpoint_type&, asio::error_code& ec)
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{
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ec = asio::error::operation_not_supported;
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return results_type();
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}
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// Asynchronously resolve an endpoint to a list of entries.
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template <typename Handler>
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void async_resolve(implementation_type&,
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const endpoint_type&, Handler& handler)
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{
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asio::error_code ec = asio::error::operation_not_supported;
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const results_type results;
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io_context_.get_io_context().post(
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detail::bind_handler(handler, ec, results));
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}
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private:
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io_context_impl& io_context_;
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winrt_async_manager& async_manager_;
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};
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} // namespace detail
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // defined(ASIO_WINDOWS_RUNTIME)
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#endif // ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP
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