1 // 2 // detail/resolver_service.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See accompanying 8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 9 // 10 11 #ifndef BOOST_ASIO_DETAIL_RESOLVER_SERVICE_HPP 12 #define BOOST_ASIO_DETAIL_RESOLVER_SERVICE_HPP 13 14 #if defined(_MSC_VER) && (_MSC_VER >= 1200) 15 # pragma once 16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) 17 18 #include <boost/asio/detail/config.hpp> 19 20 #if !defined(BOOST_ASIO_WINDOWS_RUNTIME) 21 22 #include <boost/asio/ip/basic_resolver_iterator.hpp> 23 #include <boost/asio/ip/basic_resolver_query.hpp> 24 #include <boost/asio/detail/addressof.hpp> 25 #include <boost/asio/detail/resolve_endpoint_op.hpp> 26 #include <boost/asio/detail/resolve_op.hpp> 27 #include <boost/asio/detail/resolver_service_base.hpp> 28 29 #include <boost/asio/detail/push_options.hpp> 30 31 namespace boost { 32 namespace asio { 33 namespace detail { 34 35 template <typename Protocol> 36 class resolver_service : public resolver_service_base 37 { 38 public: 39 // The implementation type of the resolver. A cancellation token is used to 40 // indicate to the background thread that the operation has been cancelled. 41 typedef socket_ops::shared_cancel_token_type implementation_type; 42 43 // The endpoint type. 44 typedef typename Protocol::endpoint endpoint_type; 45 46 // The query type. 47 typedef boost::asio::ip::basic_resolver_query<Protocol> query_type; 48 49 // The iterator type. 50 typedef boost::asio::ip::basic_resolver_iterator<Protocol> iterator_type; 51 52 // Constructor. resolver_service(boost::asio::io_service & io_service)53 resolver_service(boost::asio::io_service& io_service) 54 : resolver_service_base(io_service) 55 { 56 } 57 58 // Resolve a query to a list of entries. resolve(implementation_type &,const query_type & query,boost::system::error_code & ec)59 iterator_type resolve(implementation_type&, const query_type& query, 60 boost::system::error_code& ec) 61 { 62 boost::asio::detail::addrinfo_type* address_info = 0; 63 64 socket_ops::getaddrinfo(query.host_name().c_str(), 65 query.service_name().c_str(), query.hints(), &address_info, ec); 66 auto_addrinfo auto_address_info(address_info); 67 68 return ec ? iterator_type() : iterator_type::create( 69 address_info, query.host_name(), query.service_name()); 70 } 71 72 // Asynchronously resolve a query to a list of entries. 73 template <typename Handler> async_resolve(implementation_type & impl,const query_type & query,Handler & handler)74 void async_resolve(implementation_type& impl, 75 const query_type& query, Handler& handler) 76 { 77 // Allocate and construct an operation to wrap the handler. 78 typedef resolve_op<Protocol, Handler> op; 79 typename op::ptr p = { boost::asio::detail::addressof(handler), 80 boost_asio_handler_alloc_helpers::allocate( 81 sizeof(op), handler), 0 }; 82 p.p = new (p.v) op(impl, query, io_service_impl_, handler); 83 84 BOOST_ASIO_HANDLER_CREATION((p.p, "resolver", &impl, "async_resolve")); 85 86 start_resolve_op(p.p); 87 p.v = p.p = 0; 88 } 89 90 // Resolve an endpoint to a list of entries. resolve(implementation_type &,const endpoint_type & endpoint,boost::system::error_code & ec)91 iterator_type resolve(implementation_type&, 92 const endpoint_type& endpoint, boost::system::error_code& ec) 93 { 94 char host_name[NI_MAXHOST]; 95 char service_name[NI_MAXSERV]; 96 socket_ops::sync_getnameinfo(endpoint.data(), endpoint.size(), 97 host_name, NI_MAXHOST, service_name, NI_MAXSERV, 98 endpoint.protocol().type(), ec); 99 100 return ec ? iterator_type() : iterator_type::create( 101 endpoint, host_name, service_name); 102 } 103 104 // Asynchronously resolve an endpoint to a list of entries. 105 template <typename Handler> async_resolve(implementation_type & impl,const endpoint_type & endpoint,Handler & handler)106 void async_resolve(implementation_type& impl, 107 const endpoint_type& endpoint, Handler& handler) 108 { 109 // Allocate and construct an operation to wrap the handler. 110 typedef resolve_endpoint_op<Protocol, Handler> op; 111 typename op::ptr p = { boost::asio::detail::addressof(handler), 112 boost_asio_handler_alloc_helpers::allocate( 113 sizeof(op), handler), 0 }; 114 p.p = new (p.v) op(impl, endpoint, io_service_impl_, handler); 115 116 BOOST_ASIO_HANDLER_CREATION((p.p, "resolver", &impl, "async_resolve")); 117 118 start_resolve_op(p.p); 119 p.v = p.p = 0; 120 } 121 }; 122 123 } // namespace detail 124 } // namespace asio 125 } // namespace boost 126 127 #include <boost/asio/detail/pop_options.hpp> 128 129 #endif // !defined(BOOST_ASIO_WINDOWS_RUNTIME) 130 131 #endif // BOOST_ASIO_DETAIL_RESOLVER_SERVICE_HPP 132