IP分片重组算法的研究和改进  

Study and improvement of IP datagram reassembly algorithms

作　　者：李响[1] 王清贤[1] 罗军勇[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002

出　　处：《计算机工程与设计》2008年第14期3555-3557,共3页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2003AA146010)

摘　　要：分片和重组是IP的重要机制之一。当原始数据报被分片后,目的主机的IP层须将接收到的所有分片重组成原始数据报。重点研究了RFC791和RFC815建议的IP分片重组算法,对比了两种算法各自的特点,并分析其存在的不足。重点对RFC815中所描述的分片处理算法进行了优化改进,同时提高了其安全性。One of an important mechanism of IP is fragmentation and reassembly. When IP packet is fragmented, the IP layer at the receiving host must accumulate these fragments until enough have arrived to completely reconstitute the original datagram. By studying and contrasting the IP datagram fragment algorithms described by RFC791 and RFC815, the deficiencies are analyzed. The fragment processing algorithm described by RFC815 is improved, and the security is also enhanced.

关 键 词：分片重组 RFC791 RFC815 洞描述符 网络安全 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]