基于FPGA的IP分片重组的实现

针对计算机网络中常出现的IP分片问题,依据RFC791中描述的IP协议分片重组的基本原理,在＂快速判断分片属于哪个数据报＂和＂快速判断分片重组过程是否完成＂两方面提出了改进措施,并在FPGA平台上设计实现了IP分片重组硬件系统。该系统以包预处理器、资源管理器和DDR出入端口为核心单元,充分利用了FPGA的高速逻辑运算能力,实现了高速网络数据流中IP分片的重组,吞吐率最高可达1.2 Gbit/s。

Implementation of IP Fragments Reassembly Based on FPGA

IP fragmentation is one of the most tough problems in the realm of computer network.The major contributions of this paper are that two approaches on how to determine instantaneously which datagram the coming fragment belongs to and how to determine instantaneously when the assembly progress finishes are proposed on the basis of basic IP fragments reassembly principle described in RFC791,and an IP fragments reassembly hardware system is implemented on FPGA.Packets preprocessor,resource manager and DDR I/O P...