Framework Design And Implementation Of Monitoring Public Opinion Techniques For Wireless Lans

With the rapid development of WLAN in the domestic and the expansion of the range of application. people are becoming more and more dependent on WLAN at the same time.with more attention paid to the network content security problems, various monitoring methods and equipment is becoming more and more rich, but now the monitoring technology of basic it is to monitor the data transport layer, not to restore the data of application layer, it is not convenient to realize content monitoring.The thesis studied the principle of WLAN monitoring and the technology of data packet capturing, and on the basis to realize the WLAN packets monitoring, combined with the knowledge of the HTTP protocol and the SMTP protocol, designed and implemented the content’s reduction of web, mail and weibo, Finally realized the public opinion information found based on WM algorithm.The main contents and innovation points are as follows:(1) Studied and puted forward a public opinion monitoring system model for WLAN.Model monitors the WLAN by using port mirroring technology and setting the network card working mode for mixed mode,Model obtained all network data packets in the WLAN by Jpcap packet interception technology,then designed a two-dimensional array linked lists to store the TCP packets, designed different from TCP data reduction process to extract the content of web pages, emails and weibo(including mobile client) according to the characteristics of the TCP packets, public opinion information discovery process was constructed based on the multiple pattern matching algorithm, finally, it implements the public opinion.(2) Designed and realizesd the WLAN public opinion monitoring layered model structure, realizesd the WLAN data monitoring. The model is divided into four modules:packet capture module, the protocol parsing module, information reduction module and monitoring management module. The structure of the thesis expounds on the various modules and workflow, the thesis introduced the development environment of the model and implementation details of each module, and analyzed the public opinion information that the model can be used to monitor.(3) The whole public opinion monitoring system was based on JAVA programming language.the technique of S2SH (struts2+Hibernate+spring) was used to develop the system, and adopted the multithreading technology to guarantee system parallel operation of the various modules, improved the system’s efficiency.(4) Finally, assessed the system function and performance.the test results show that it was more efficient compared to the previous monitoring system, its functionality and performance reached the expected results, having a certain realistic significance and research value.The thesis studied the principle of WLAN monitoring and the technology of public opinion found, realizesd the efficient WLAN public opinion monitoring system based on layered architecture, the system’s running situation was good in the actual network environment, verified the feasibility of the system, has certain reference significance to the similar monitoring management system.