局域网抓包软件的设计与实现

包括文档,设计,文档字数:11083,页数:29

摘  要
随着网络技术的不断发展，社会进入了一个信息爆炸的时代，世界也由于网络而变小，人们通过各种技术和工具使交流突破了空间的限制。在网络技术发展与普及的同时，网络安全问题引起了人们的广泛关注。因此，研究并开发出一种能够有效地实时捕获网络信息的系统具有极其重要的意义。基于这一情况，本文档针对网络数据的捕获与数据包信息分析等问题进行了深入的探讨和研究。本文档逐一介绍了信息捕获中的相关技术及需求分析，在系统设计中对数据包捕获模块、解码数据包模块和数据库信息模块的实现进行了详细讲述。通过运用WinPcap开发包实现网络数据包的捕获，利用TCP/IP 协议的封装理论和自下而上的分析实现了数据包信息的分析，并且将分析出来的信息存入数据库。另外，还能实现一些功能，如对指定的IP地址进行数据包的捕获，对捕获结果进行显示等。

关键词：WinPcap；数据捕获；信息分析；局域网

The Design and Implementation of LAN Information Capture Software
Abstract
As development of the network and technology, the society comes into a age of information explosion. Due to the network, the world has become smaller, and people use all kinds of technologies and tools to break through the limitation of communication. The network security has been widely concerned followed by the development and universal of the network technology. Therefore, it is great significance that an effective real-time interception network information system is studied and developed. Based on this situation, this thesis in-depth studies to capture the network data and so on. Besides, it introduces relative technology and the needs information capture. The realization of the data capture module, data packet decoded module and database information module is displayed for detail in the system's design. The network data packet is captured through WinPcap, some functions has been realized, such as network data packet capture, data packets of information analysis by using TCP / IP protocol encapsulation theory and bottom-up, and will analyze the information stored in the database. Simultaneously, this software would also increases some functions, such as data packet capture by the IP address, make the results and statistics，display the results of data packet capture and so on.

Key words: WinPcap; data capture; information analysis ; LAN

目  录

1 引言 1
1.1 课题背景及意义 1
1.2 本课题研究的相关技术及方法 1
1.3 Visual C++ 6.0 1
1.4 Winpcap简介 2
2 基于信息捕获的相关理论基础 4
2.1 TCP/IP协议 4
2.2 数据封装与分用过程 6
2.3 IP协议 7
3 需求分析 9
3.1 功能需求 9
3.2 性能要求 10
4 局域网信息捕获器的设计 10
4.1 功能概述 10
4.2 系统功能模块的设计 11
4.2.1 数据包捕获模块 11
4.2.2 数据分析模块实现 13
4.2.3 数据库模块的实现 16
4.3 用户界面模块 19
5 局域网信息捕获测试和测试结果 20
5.1 测试环境 20
5.2 测试结果 20
结    论 22
参考文献 23
致    谢 24
声    明 25

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