大型论坛检测系统的开发与应用.docVIP

大型论坛检测系统的开发与应用 摘 要 互联网Libpcap库函数来实现抓包，对包中的内容进行分析，找出有害的信息，从而实现过滤功能。利用文中介绍的方法来构建监测系统，能起到一定的监测作用。 关键词：论坛监测；抓包；过滤；伯克利数据包过滤器 Design and Implementation of the Internet Forum Detective System Abstract As the internet has been developing rapidly, the internet forum has brought many convenient to the people. But at the same time, it also has been having a series of questions, such as spreads the pornography, declares the reactionary opinion, divulges the secret of technology, etc. Therefore the requirement of the Internet forum detective system has been stared in the face, and thorough analysis for the system has the extremely vital significance. The thesis introduces the base knowledge of network, the principle of the network detecting and filter. Pointed out a method of how the data transport from the customer to the server. The thesis has analyzed the goal of internet forum detective system, the principle of system composition and the function module. The important module includes the module of capture package, module of decode, module of matching. The system proposes the broadcast characteristic of Ethernet, using the BPF technology to gain the network information in the common network environment. The system has base on Linux operation system, transferring a libpcap storeroom function to grasp the package, analyzing the content of the package and finding the bad message in order to realize the function of filter. The thesis uses the method which was referred just now to construct the system detective, and it realizes some of its functions. Key words: The forum detecting; Libpcap; filter; BPF 目 录 论文总页数：25页 1引 言 1 1.1课题背景 1 1.2本课题研究的意义 1 1.3本课题的研究方向 1 2网络监测和过滤技术 1 2.1网络监测技术简介 2 2.2包捕获 3 2.2.1利用以太网的广播特性进行包捕获 3 2.3包过滤 3 3系统需求分析 4 3.1互联网论坛监测的产生 4 3.2论坛内容监测系统的总体目标 4 3.2.1系统所需的环境配置 5 3.2.2系统的流程图 6 3.3系统功能分析 6 4论坛监测软件设计的总体方案 9 4.1论坛监测软件主要功能 9 4