Application Layer Packet Filter System Based on RE2

• Main Authors: Jen-Hung Fu, 傅仁宏
• Other Authors: Po-Zung Chen
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/47796299336049705656

碩士 === 淡江大學 === 資訊工程學系碩士在職專班 === 98 === With the fast development of internet, various kinds of network service appear. Every of them need to take some amount of bandwidth when it work, so how to make all kinds of service work smoothly under limit bandwidth becomes very important issue for proper bandwidth distribution and management. If we want to distribute the bandwidth properly , at first, we have to correctly distinguish the communication protocol. However, the current packet filters are not able to recognize the P2P packet effectly. Thus,this research adopt the packet filter using regular expression for analyzing the application layer informations, and want to promote the efficiency of application layer packet filter through modifying the regular expression library. This research take RE2, a new released regular expression library on google code, as experimental group, and the original build-in GNU C Regex library as control group. Through comparing the execution efficiency to verify if we can promote the efficiency of packet filter after adopting the RE2 library, and to achieve the goal of bandwidth distribution improvement.