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//
// v6_only.hpp
// ~~~~~~~~~~~
//
// Copyright (c) 2003-2008 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_IP_V6_ONLY_HPP
#define BOOST_ASIO_IP_V6_ONLY_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/push_options.hpp>
#include <boost/asio/detail/socket_option.hpp>
namespace boost {
namespace asio {
namespace ip {
/// Socket option for determining whether an IPv6 socket supports IPv6
/// communication only.
/**
* Implements the IPPROTO_IPV6/IP_V6ONLY socket option.
*
* @par Examples
* Setting the option:
* @code
* boost::asio::ip::tcp::socket socket(io_service);
* ...
* boost::asio::ip::v6_only option(true);
* socket.set_option(option);
* @endcode
*
* @par
* Getting the current option value:
* @code
* boost::asio::ip::tcp::socket socket(io_service);
* ...
* boost::asio::ip::v6_only option;
* socket.get_option(option);
* bool v6_only = option.value();
* @endcode
*
* @par Concepts:
* GettableSocketOption, SettableSocketOption.
*/
#if defined(GENERATING_DOCUMENTATION)
typedef implementation_defined v6_only;
#elif defined(IPV6_V6ONLY)
typedef boost::asio::detail::socket_option::boolean<
IPPROTO_IPV6, IPV6_V6ONLY> v6_only;
#else
typedef boost::asio::detail::socket_option::boolean<
boost::asio::detail::custom_socket_option_level,
boost::asio::detail::always_fail_option> v6_only;
#endif
} // namespace ip
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_IP_V6_ONLY_HPP
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