linux协议栈中间层扩展方法设计与实现

Linux protocol stack has been relatively stable, and is divided into socket layer, TCP layer, IP layer and driver layer.But sometimes it is needed to extend the linux protocol stack, and expansion is divided into horizontal expansion and vertical expansion.This article discusses the principle of linux device-independent interface to extend the protocol stack in vertical-align. And a extended middle layer is implemented useing simple-event-queue.A software is finished to achieve the above design.The finally test results show that the method of the expansion is valid, and the middle stack can correctly receive packets from the upper layer and send packets to the lower layer. The extended middle layer using simple-event-queue can keep relatively high throughput under the high rate of packets transmission.