| // |
| // detail/resolver_service.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 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 BOOST_ASIO_DETAIL_RESOLVER_SERVICE_HPP |
| #define BOOST_ASIO_DETAIL_RESOLVER_SERVICE_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/config.hpp> |
| #include <boost/asio/ip/basic_resolver_iterator.hpp> |
| #include <boost/asio/ip/basic_resolver_query.hpp> |
| #include <boost/asio/detail/resolve_endpoint_op.hpp> |
| #include <boost/asio/detail/resolve_op.hpp> |
| #include <boost/asio/detail/resolver_service_base.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| |
| template <typename Protocol> |
| class resolver_service : 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 boost::asio::ip::basic_resolver_query<Protocol> query_type; |
| |
| // The iterator type. |
| typedef boost::asio::ip::basic_resolver_iterator<Protocol> iterator_type; |
| |
| // Constructor. |
| resolver_service(boost::asio::io_service& io_service) |
| : resolver_service_base(io_service) |
| { |
| } |
| |
| // Resolve a query to a list of entries. |
| iterator_type resolve(implementation_type&, const query_type& query, |
| boost::system::error_code& ec) |
| { |
| boost::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 ? iterator_type() : iterator_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 = { boost::addressof(handler), |
| boost_asio_handler_alloc_helpers::allocate( |
| sizeof(op), handler), 0 }; |
| p.p = new (p.v) op(impl, query, io_service_impl_, handler); |
| |
| start_resolve_op(p.p); |
| p.v = p.p = 0; |
| } |
| |
| // Resolve an endpoint to a list of entries. |
| iterator_type resolve(implementation_type&, |
| const endpoint_type& endpoint, boost::system::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 ? iterator_type() : iterator_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 = { boost::addressof(handler), |
| boost_asio_handler_alloc_helpers::allocate( |
| sizeof(op), handler), 0 }; |
| p.p = new (p.v) op(impl, endpoint, io_service_impl_, handler); |
| |
| start_resolve_op(p.p); |
| p.v = p.p = 0; |
| } |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // BOOST_ASIO_DETAIL_RESOLVER_SERVICE_HPP |