// // ip/unicast.hpp // ~~~~~~~~~~~~~~ // // Copyright (c) 2003-2011 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(io_service); * ... * 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(io_service); * ... * 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< IPPROTO_IP, IP_TTL, IPPROTO_IPV6, 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