SDN (Software Defined Networking) controller classifying network flows through DPI (Deep Packet Inspection) data package

Abstract

The invention discloses an SDN (Software Defined Networking) controller classifying network flows through a DPI (Deep Packet Inspection) data package. According to the SDN controller classifying the network flows through the DPI data package, a DPI module which adopts a parallel processing mode is added to the existing SDN controller; the DPI module comprises a message header removing module, a package-flow conversion module, a grouping thread scheduling module, a plurality of thread modules and a flow table construction module; the flow table construction module comprises a protocol table and a flow table which exist in tabular forms; the data package is obtained by modifying an OpenFlow protocol to achieve communication between the controller and a network switch; follow-up data package forwarding is controlled through grouping scheduling of flow connection and issuing of the data package into a processing thread and issuing of the flow table to the switch through regex match. The SDN controller classifying the network flows through the DPI data package can achieve well DPI deployment under the SDN network, reduces the data package processing speed and improves the handling capacity.

Description

technical field [0001] The present invention relates to an SDN controller, more particularly, refers to an SDN controller that uses deep packet detection technology to quickly classify data packets, especially an implementation scheme based on deep packet detection technology under the SDN framework, and Optimize group scheduling and flow table delivery. Background technique [0002] The first printing in September 2013, Electronics Industry Press, "SDN Core Technology Analysis and Practical Guide" edited by Lei Baohua and others. on page 15 figure 1 -6 The public SDN core technology system diagram (denoted as figure 1 ), it introduces that there are many core technologies at each level of the SDN architecture, and its goal is to effectively separate the control plane and the forwarding plane, support logically centralized unified control, and provide flexible development interfaces. Among them, the control layer is the core of the entire SDN, and the southbound and north...

AI Technical Summary

Problems solved by technology

[0009] The currently designed SDN controller does not have the ability to classify network flows, nor can it control network data packets, so it cannot be applied to network services based on traffic classification

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