【摘要】 一般的包过滤系统仅对IP(InternetProtocol)地址、端口类型等项目进行过滤。笔者提出了对数据包中的数据按照关键字进行过滤的方法,并基于KMP(Kunth-Morris-Pratt)关键字匹配算法,对该系统进行了相应的性能测试。在测试环境下,得出网络吞吐量为75%,1000字节长的数据帧的平均过滤时延约为100μs等一系列测试数据。通过对过滤时延的分析及网络吞吐量的测试结果表明,该方案所设计的系统性能基本能够满足实际要求。更多还原

【Abstract】 Common packet filter system can only filt er the project based on the IP address and port type, a method to filter aimed a t the data in data packet according to the key word is presented.On the bas is of the key word KMP(Kunth-Morris-Pratt) arithmetic, tests the function of the system accordingly ,thus gets a series of testing data as throughput is 75% and average filtrate d elay is about 100 μs for frame of 1 000 bytes in testing environment .Through t he analysis of the filter delay and the network throughput, presents that the syst em performance designed by this scheme can meet the performance needs of practic al use.更多还原