Method and system for processing capwap tunnel data on wireless network controller based on linux virtual network card

Abstract

The invention discloses a method and system for processing capwap tunnel data on a wireless network controller based on a linux virtual network card. The method includes: receiving data from a UDP port 5247 of a downlink real network card; removing a capwap protocol header of the data and obtaining user data; or receiving data of a raw socket bound by an uplink real network card; processing the user data according to a forwarding rule and obtaining forwarded user data; comparing a target address of the processed user data with a user MAC address and judging a sending direction of the data; if the data is to be sent to a network, sending the data to the network through the raw socket bound by the uplink real network card; and if the data is to be sent to a wireless access point, adding the capwap protocol header to the data and sending the data to the wireless access point through the UDP port 5247 of the downlink real network card. Software related to the method and system is low in development difficulty, short in development cycle and small in dependence on hardware.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and system for processing capwap tunnel data on a wireless network controller based on a linux virtual network card. Background technique [0002] The capwap protocol is a wireless local area network (WLAN) tunneling protocol, used for communication and interaction between the wireless access point (AP) and the wireless network controller (AC), and realizes the control management and data forwarding of all APs associated with the AC. The two-layer data encapsulation is used between the AP and the AC: the outer layer is the capwap protocol header between the AP and the AC, the protocol header is based on the UDP protocol of port 5247, and the inner layer is encapsulated as the user's business data. [0003] Existing Tap virtual network card technologies such as figure 2 As shown, the linux operating system is divided into a user state 10 and a kernel state 20, and t...

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Problems solved by technology

[0008] 1. In the linux kernel, the capwap tunnel data is disassembled and forwarded. The disadvantage is that it needs to be developed in the linux kernel state, which is difficult to develop and debug.

[0009] 2. Use the network processor to process the data packet process separately. The disadvantage is that it needs to use a special network processor, and it needs to develop the data forwarding function of the second layer and the third layer. The development is difficult and the hardware cost is high.

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