NETLINK是LINUX环境下一种新型的用户空间与内核空间的交互方法，示例代码给出了一个实例，将网络数据包以NETLINK的方式从内核空间发送至用户空间，再由用户空间返回。-under LINUX environment NETLINK is a new type of user space and kernel space of interactive methods, sample code gives an example of a network packet to the NETLINK sent from kernel space to user space and then return to user space.