毕业设计- Linux系统下Sniffer的实现.doc

南京邮电大学通达学院
毕业设计(论文)
题目: Linux系统下Sniffer的实现

专业:
计算机科学与技术
学生姓名:
班级学号:
04003040
指导教师:
指导单位:
中磊(苏州)研发中心
计算机学院软件工程系

日期: 2008年03月17日至 2008年 06月20日
摘要
Sniffer是一种强大的网络分析工具,它集成了很多可以有力解决网络问题的功能。Sniffer可以实时地列出流经多个网卡(包括Modem,ISDN,ADSL)的数据包,它还支持基于某些应用的数据包捕捉。通过它,你可以获得你所感兴趣的某个应用的所有网络流量。
今天,Sniffer成为了网络监控器和网络分析器的专用名词,它通常还代表收集数据和信息的方法。ISS把它这样定义:Sniffer是一种利用自身网络接口来对目的地是其它计算机的数据包进行捕捉的一种工具。
本文介绍并研究了Sniffer相关技术,重点是在Linux系统下如何实现Sniffer并获得相关数据包,并且详细介绍了Linux环境下Sniffer的实现过程。通过阅读本论文,您会对Sniffer有大致的了解,还可以得知如何在Linux系统环境下实现一个Sniffer的详细过程。同时,本文还简略介绍TCP/IP协议栈和Sniffer实现过程的关系,详尽分析了TCP/IP中各个层次。
关键词:嗅探器;数据包;协议栈;以太网
ABSTRACT
Sniffer is a work analysis tool. It consists of a well-integrated set of functions that can work problems. Network Sniffer can list all of work packets in real-time from work card (Include Modem, ISDN, ADSL) and can also support capturing packets based on the applications (SOCKET, TDI etc). You can observe all traffic of the application that you are interested in.
Today, Sniffer es a special name work monitor and analyzer; it also usually stands for a means of collecting data and information. ISS defines sniffer as: Sniffer is a tool which work interfaces puter to capture data packets which destination is puters.
This paper describes the Sniffer and related technology, focusing on how to achieve Sniffer obtain the relevant data packets in linux environment, and details of the realization of sniffer process in linux environment. By reading this paper, you will have more or less understanding of Sniffer, you can also learn how to achieve a Sniffer in detail with the existed linux environment. At the same time, the paper also briefly introduced the relationship between TCP / IP protocol stack and Sniffer realization, and the detailed analysis of the TCP / IP in all levels.
Keywords:Sniffer; Package; Stack;

目录
第一章 Sniffer简介 1
什么是Sniffer ? 1
Sniffer的应用 1
常用Sniffer系统简介 3
Sniffer技术发展状况 5
为什么要实现此系统? 5
第二章 Sniffer 和 TCP/IP 之间的关系 6