#### socket_base::keep_alive

Socket option to send keep-alives.

    typedef implementation_defined keep_alive;

Implements the SOL_SOCKET/SO_KEEPALIVE socket option.

###### Examples

Setting the option:

    asio::ip::tcp::socket socket(my_context);
    ...
    asio::socket_base::keep_alive option(true);
    socket.set_option(option);

Getting the current option value:

    asio::ip::tcp::socket socket(my_context);
    ...
    asio::socket_base::keep_alive option;
    socket.get_option(option);
    bool is_set = option.value();

###### Requirements

Header: `asio/socket_base.hpp`

Convenience header: `asio.hpp`