| // |
| // detail/resolver_service.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2016 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_RESOLVER_SERVICE_HPP |
| #define ASIO_DETAIL_RESOLVER_SERVICE_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| |
| #if !defined(ASIO_WINDOWS_RUNTIME) |
| |
| #include "asio/ip/basic_resolver_query.hpp" |
| #include "asio/ip/basic_resolver_results.hpp" |
| #include "asio/detail/memory.hpp" |
| #include "asio/detail/resolve_endpoint_op.hpp" |
| #include "asio/detail/resolve_op.hpp" |
| #include "asio/detail/resolver_service_base.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| template <typename Protocol> |
| class resolver_service : |
| public service_base<resolver_service<Protocol> >, |
| public resolver_service_base |
| { |
| public: |
| // The implementation type of the resolver. A cancellation token is used to |
| // indicate to the background thread that the operation has been cancelled. |
| typedef socket_ops::shared_cancel_token_type implementation_type; |
| |
| // The endpoint type. |
| typedef typename Protocol::endpoint endpoint_type; |
| |
| // The query type. |
| typedef asio::ip::basic_resolver_query<Protocol> query_type; |
| |
| // The results type. |
| typedef asio::ip::basic_resolver_results<Protocol> results_type; |
| |
| // Constructor. |
| resolver_service(asio::io_context& io_context) |
| : service_base<resolver_service<Protocol> >(io_context), |
| resolver_service_base(io_context) |
| { |
| } |
| |
| // Destroy all user-defined handler objects owned by the service. |
| void shutdown() |
| { |
| this->base_shutdown(); |
| } |
| |
| // Perform any fork-related housekeeping. |
| void notify_fork(asio::io_context::fork_event fork_ev) |
| { |
| this->base_notify_fork(fork_ev); |
| } |
| |
| // Resolve a query to a list of entries. |
| results_type resolve(implementation_type&, const query_type& query, |
| asio::error_code& ec) |
| { |
| asio::detail::addrinfo_type* address_info = 0; |
| |
| socket_ops::getaddrinfo(query.host_name().c_str(), |
| query.service_name().c_str(), query.hints(), &address_info, ec); |
| auto_addrinfo auto_address_info(address_info); |
| |
| return ec ? results_type() : results_type::create( |
| address_info, query.host_name(), query.service_name()); |
| } |
| |
| // Asynchronously resolve a query to a list of entries. |
| template <typename Handler> |
| void async_resolve(implementation_type& impl, |
| const query_type& query, Handler& handler) |
| { |
| // Allocate and construct an operation to wrap the handler. |
| typedef resolve_op<Protocol, Handler> op; |
| typename op::ptr p = { asio::detail::addressof(handler), |
| op::ptr::allocate(handler), 0 }; |
| p.p = new (p.v) op(impl, query, io_context_impl_, handler); |
| |
| ASIO_HANDLER_CREATION((io_context_impl_.context(), |
| *p.p, "resolver", &impl, 0, "async_resolve")); |
| |
| start_resolve_op(p.p); |
| p.v = p.p = 0; |
| } |
| |
| // Resolve an endpoint to a list of entries. |
| results_type resolve(implementation_type&, |
| const endpoint_type& endpoint, asio::error_code& ec) |
| { |
| char host_name[NI_MAXHOST]; |
| char service_name[NI_MAXSERV]; |
| socket_ops::sync_getnameinfo(endpoint.data(), endpoint.size(), |
| host_name, NI_MAXHOST, service_name, NI_MAXSERV, |
| endpoint.protocol().type(), ec); |
| |
| return ec ? results_type() : results_type::create( |
| endpoint, host_name, service_name); |
| } |
| |
| // Asynchronously resolve an endpoint to a list of entries. |
| template <typename Handler> |
| void async_resolve(implementation_type& impl, |
| const endpoint_type& endpoint, Handler& handler) |
| { |
| // Allocate and construct an operation to wrap the handler. |
| typedef resolve_endpoint_op<Protocol, Handler> op; |
| typename op::ptr p = { asio::detail::addressof(handler), |
| op::ptr::allocate(handler), 0 }; |
| p.p = new (p.v) op(impl, endpoint, io_context_impl_, handler); |
| |
| ASIO_HANDLER_CREATION((io_context_impl_.context(), |
| *p.p, "resolver", &impl, 0, "async_resolve")); |
| |
| start_resolve_op(p.p); |
| p.v = p.p = 0; |
| } |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // !defined(ASIO_WINDOWS_RUNTIME) |
| |
| #endif // ASIO_DETAIL_RESOLVER_SERVICE_HPP |