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1 | // |
2 | // detail/resolver_service.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2016 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. | |
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. | |
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> | |
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. | |
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> | |
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 |