用于局域网的网络嗅探器的设计

目前，世界上主流的嗅探器都是以捕获数据包为其核心技术，而对于抓包过程有两种常见的机制，第一种是常见的UNIX／LINUX内核本身所具有的抓包功能。第二种是使用第三方软件和抓包驱动来实现抓包功能。本文根据网络嗅探的技术、原理、方法做出详细的论述，同时，讨论了现在使用较为广泛的嗅探软件与技术，然后，通过进行软件功能需求分析，我们论述了一个嗅探技术的新思路，用它来帮助网络管理人员对局域网进行监控。

The Design and Implementation of The Network Sniffer Used For The Local Area Network

So far, the epidemic sniffer is based on the data packet catching technology.There are two usual mechanism about catching data packet.The first is the function provided by the kernel of the UNIX/LINUX operating system.The second is that using the software to catching the data packet.This article made a detailed discourse according to the network sniffer technology, principle, method.We also discussed the network software and technology that is widely used today.Then we analysis the functional requirements, and discuss a new idea about sniff technology.It can help the network supervisor to monitor the local area network.