63e88f80
 Hu Chunming
提交三方库
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//
// ip/unicast.hpp
// ~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2022 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_UNICAST_HPP
#define BOOST_ASIO_IP_UNICAST_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#include <cstddef>
#include <boost/asio/ip/detail/socket_option.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace ip {
namespace unicast {
/// Socket option for time-to-live associated with outgoing unicast packets.
/**
* Implements the IPPROTO_IP/IP_UNICAST_TTL socket option.
*
* @par Examples
* Setting the option:
* @code
* boost::asio::ip::udp::socket socket(my_context);
* ...
* boost::asio::ip::unicast::hops option(4);
* socket.set_option(option);
* @endcode
*
* @par
* Getting the current option value:
* @code
* boost::asio::ip::udp::socket socket(my_context);
* ...
* boost::asio::ip::unicast::hops option;
* socket.get_option(option);
* int ttl = option.value();
* @endcode
*
* @par Concepts:
* GettableSocketOption, SettableSocketOption.
*/
#if defined(GENERATING_DOCUMENTATION)
typedef implementation_defined hops;
#else
typedef boost::asio::ip::detail::socket_option::unicast_hops<
BOOST_ASIO_OS_DEF(IPPROTO_IP),
BOOST_ASIO_OS_DEF(IP_TTL),
BOOST_ASIO_OS_DEF(IPPROTO_IPV6),
BOOST_ASIO_OS_DEF(IPV6_UNICAST_HOPS)> hops;
#endif
} // namespace unicast
} // namespace ip
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_IP_UNICAST_HPP
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