基于OpenWRT控制无线AP网络流量的方法

With the rapid development of Internet technology, computer network has been in all aspects of life, and the attendant problems have gradually aroused people's attention.Network security threats, the abnormal flow in the network, etc., have brought a negative impact on the normal use of the network.Nowadays, with the increasing of access equipment and business diversity, the AP FAT network architecture is gradually turning to the AC +AP FIT network architecture.This is not only can provide more free system resources for AP to achieve more traffic statistics, while as the data packet forwarding device, the AP can achieve a more comprehensive statistics。In the network communication, AP is the key device of the wireless terminal access network. With the aid of OpenWRT platform, the paper designs the traffic capture and traffic statistics module based on the Netfilter framework.Through the cross compiling and dynamic loading, the module runs in the kernel space of DIR-615D DLink. In this paper, the design of the network access device traffic statistics system, which can effectively meet the network management personnel of the network traffic monitoring needs, can reduce the monitoring system and the coupling of terminal equipment.The core state traffic statistics module, which can effectively avoid the traditional user space network monitoring system from the kernel space to user space memory copy operation, reduce the waste of system resources, provides the overall performance of the system.