110 lines
3.6 KiB
C++
110 lines
3.6 KiB
C++
//
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// resolver_query_base.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2008 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_IP_RESOLVER_QUERY_BASE_HPP
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#define ASIO_IP_RESOLVER_QUERY_BASE_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/push_options.hpp"
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#include "asio/detail/push_options.hpp"
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#include <boost/config.hpp>
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#include <boost/detail/workaround.hpp>
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#include "asio/detail/pop_options.hpp"
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#include "asio/detail/socket_types.hpp"
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namespace asio {
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namespace ip {
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/// The resolver_query_base class is used as a base for the
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/// basic_resolver_query class templates to provide a common place to define
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/// the flag constants.
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class resolver_query_base
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{
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public:
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#if defined(GENERATING_DOCUMENTATION)
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/// Determine the canonical name of the host specified in the query.
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static const int canonical_name = implementation_defined;
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/// Indicate that returned endpoint is intended for use as a locally bound
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/// socket endpoint.
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static const int passive = implementation_defined;
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/// Host name should be treated as a numeric string defining an IPv4 or IPv6
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/// address and no name resolution should be attempted.
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static const int numeric_host = implementation_defined;
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/// Service name should be treated as a numeric string defining a port number
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/// and no name resolution should be attempted.
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static const int numeric_service = implementation_defined;
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/// If the query protocol family is specified as IPv6, return IPv4-mapped
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/// IPv6 addresses on finding no IPv6 addresses.
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static const int v4_mapped = implementation_defined;
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/// If used with v4_mapped, return all matching IPv6 and IPv4 addresses.
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static const int all_matching = implementation_defined;
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/// Only return IPv4 addresses if a non-loopback IPv4 address is configured
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/// for the system. Only return IPv6 addresses if a non-loopback IPv6 address
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/// is configured for the system.
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static const int address_configured = implementation_defined;
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#else
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BOOST_STATIC_CONSTANT(int, canonical_name = AI_CANONNAME);
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BOOST_STATIC_CONSTANT(int, passive = AI_PASSIVE);
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BOOST_STATIC_CONSTANT(int, numeric_host = AI_NUMERICHOST);
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# if defined(AI_NUMERICSERV)
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BOOST_STATIC_CONSTANT(int, numeric_service = AI_NUMERICSERV);
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# else
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BOOST_STATIC_CONSTANT(int, numeric_service = 0);
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# endif
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// Note: QNX Neutrino 6.3 defines AI_V4MAPPED, AI_ALL and AI_ADDRCONFIG but
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// does not implement them. Therefore they are specifically excluded here.
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# if defined(AI_V4MAPPED) && !defined(__QNXNTO__)
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BOOST_STATIC_CONSTANT(int, v4_mapped = AI_V4MAPPED);
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# else
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BOOST_STATIC_CONSTANT(int, v4_mapped = 0);
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# endif
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# if defined(AI_ALL) && !defined(__QNXNTO__)
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BOOST_STATIC_CONSTANT(int, all_matching = AI_ALL);
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# else
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BOOST_STATIC_CONSTANT(int, all_matching = 0);
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# endif
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# if defined(AI_ADDRCONFIG) && !defined(__QNXNTO__)
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BOOST_STATIC_CONSTANT(int, address_configured = AI_ADDRCONFIG);
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# else
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BOOST_STATIC_CONSTANT(int, address_configured = 0);
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# endif
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#endif
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protected:
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/// Protected destructor to prevent deletion through this type.
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~resolver_query_base()
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{
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}
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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private:
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// Workaround to enable the empty base optimisation with Borland C++.
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char dummy_;
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#endif
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};
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} // namespace ip
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_IP_RESOLVER_QUERY_BASE_HPP
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