Net Data Package Analyse And Control Device Based On Embeded Linux

With the development of computer network,the Internet has become a very important part of our life,study and work.We can get information from Internet freely.But as more and more people access the Internet,the data that the users transmit have to been managered with more powerful ways.Because the Bandwidth is finite, the real time data and some other data that should have strong interactant been buried by the large of download data. We feel the Internet velocity is very slow.This paper introduced the net data package analyse and control device based on the embeded Linux.It can reached the objective that manage the net data by the way of distribute the bandwidth,charge the flux and limit the velocity of special time phases etc.The net package analyse and control device is achieved by embeded system.The CPU uses the ARM embeded processer,it's very fashionable now.The department of peripheral equipments achieves three network interfaces and a keyboard interface,and we use the LED digital pipes display the information.We use two network interfaces to connect the inner network and Internet,the other one is used to connect the computer that is used to manage the device.Every data package passes by the device should been analysed and controled,the net package analyse and control device analyses the IP and TCP/UDP port from the net data frames,and does different process according to special IP and TCP/UDP port.The international IP,internal IP and city IP has different charge policy and maximal velocity.The special TCP/UDP port in special period of time has special policy.In this way,the real time data of network can been transmited apace and high efficiency.The operating system of the net data package analyse and control device uses embeded Linux,it has excellent stability and security;we repot a embeded web server in the board,and the administrator of the device can setup the parameters according to the way of web access,and can also see the network flux according to the web server,and the control system works in the second layer of the TCP/IP network protocal stack,which is called the data link layer, it is different from the system before now,which works in the third layer and the forth layer of the TCP/IP network protocal stack,this can avoid the data being copied between the network protocal stack.It's efficiency is perfect.The experiments have proved that the device holds perfect stability and has short transmit delay,and has got the objective of net data management.