基于TCP三次握手特性的高效连接管理方法

Efficient Connection Management Method Based on TCP Three-way Handshake Characteristic

为提升高速网络环境下的数据包处理与分析性能,基于传输控制协议(TCP)的三次握手特性,提出一种高效的连接管理方法,即待建连接缓冲法(ECB)。在分析IP网络中TCP连接建立过程特点的基础上,将待建连接从整个连接表中分离出来以单独进行缓冲,对数据包进行分类,给出每类数据包的连接管理实现流程。借助实际高速网络的流量样本,对ECB连接管理法进行性能评估,实验结果表明,ECB的查找性能比传统的单连接表管理方法提高近50%以上。

To promote the performance of packet processing and analysis in high-speed network, this paper proposes an efficient connections management method, Establishing Connection Buffering（ECB）, in virtue of the characteristics of the three-way handshake in Transmission Control Protocol（TCP）. Based on the analysis of TCP connection establishment process in IP network, it presents the design methodology that isolates establishing connections from whole connection table and buffers it separately. As a further step, it classifies packets into several types and gives the implementation of connection management for each type. It evaluates the performance of the ECB connection management with real high-speed network traffic trace. Experimental results indicate that the ECB performs almost 50% better than the traditional one with single connection table in terms of looku~ uerformance.