Initializer
init(address:length:recv_skip_hint:inq:err:copybuf_address:copybuf_len:flags:msg_control:msg_controllen:msg_flags:reserved:)
init(address: UInt64, length: UInt32, recv_skip_hint: UInt32, inq: UInt32, err: Int32, copybuf_address: UInt64, copybuf_len: Int32, flags: UInt32, msg_control: UInt64, msg_controllen: UInt64, msg_flags: UInt32, reserved: UInt32)