#### basic_raw_socket::keep_alive

Inherited from socket_base.

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(io_service);
    ...
    asio::socket_base::keep_alive option(true);
    socket.set_option(option);

Getting the current option value:

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