abstract @beta Efl.Net.Server_Ip extends Efl.Net.Server_Fd {
    [[An IP server.
    ]]
    methods {
        @property ipv6_only {
            [[Whenever IPv6 listen address will accept only same-family clients or will allow IPv4 to connect as well.

              Since Linux 2.4.21, Windows Vista and MacOS X these
              control whenever a server that did bind to an IPv6
              address will accept only IPv6 clients or will also
              accept IPv4 by automatically converting them in an IPv6
              address, allowing a single socket to handle both
              protocols.

              If an IPv6 address was used in @Efl.Net.Server.address,
              this property is $false and an IPv4 connects, then an
              address such as [::ffff:IPv4]:PORT will be used, such as
              [::ffff:192.168.0.2]:1234, where the IPv4 address can be
              extracted.

              If an IPv4 address was used in @Efl.Net.Server.address,
              this has no effect.

              Systems can configure their default value, usually true
              (allows only IPv6 clients).
            ]]
            values {
                ipv6_only: bool; [[If $true the server will only accept IPv6 clients, $false otherwise]]
            }
        }
    }

    implements {
        Efl.Object.constructor;
    }
}