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Chip co-processing method for capwap control channel dtls encryption and decryption

A control channel and encryption processing technology, applied in encryption devices with shift registers/memory, secure communication devices, digital transmission systems, etc., can solve problems such as chip-level encryption and decryption of messages that do not support CAPWAP control channels, and reduce CPU pressure, the effect of improving network performance

Active Publication Date: 2020-04-14
SUZHOU CENTEC COMM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, in the Chinese patent application with the application number 201511019516.1, we proposed a chip implementation method for encrypting and decrypting CAPWAPDTLS messages. The switching and routing chips are used to realize the encapsulation and decapsulation of CAPWAP DTLS messages, but this solution only implements Chip-level encryption and decryption of CAPWAP data channels, chip-level encryption and decryption of CAPWAP control channel messages is not supported

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  • Chip co-processing method for capwap control channel dtls encryption and decryption
  • Chip co-processing method for capwap control channel dtls encryption and decryption
  • Chip co-processing method for capwap control channel dtls encryption and decryption

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Embodiment Construction

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0023] The present invention proposes a chip co-processing method for DTLS encryption and decryption of the CAPWAP control channel, which mainly moves the DTLS encryption and decryption operation that occupies the most CPU resources in the software processing scheme of the CAPWAP control channel message to the chip for co-processing, greatly reducing Reduce CPU pressure and improve network performance.

[0024] Wherein, the chip includes an inbound processing engine (IPE), a store and forward module (BSR), an outbound processing engine (EPE), and a WLAN processing engine (WLAN Engine). The present invention is configured with a CAPWAP table in the IPE direction of the chip, which uses IPDA (purpose IP address)+IPSA (source IP address) to search, and the Key ID for decryption and the i...

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Abstract

The present invention discloses a chip co-processing method for DTLS encryption and decryption of the CAPWAP control channel, wherein the decryption process mainly checks the CAPWAP table configured in the chip, and decrypts the message according to the Key ID and isEncryptedPkt field for decryption in the entry, Finally, the decrypted message is sent to the CPU for further processing. The encryption process mainly indexes the Nexthop table configured in the chip, performs DTLS encryption on the message according to the state of the isCapwapControl field in the entry and the Key ID used for encryption, and loops the encrypted message back to the chip for normal message forwarding processing. The present invention moves the encryption and decryption operations that occupy the most CPU resources in the software processing scheme of the CAPWAP control channel message to the chip for co-processing, greatly reducing the pressure on the CPU and improving network performance.

Description

technical field [0001] The invention relates to a DTLS encryption and decryption technology of a CAPWAP control channel, in particular to a chip co-processing method for DTLS encryption and decryption of a CAPWAP control channel. Background technique [0002] AC (Access Controller, wireless controller) and AP (Access Point, wireless access point) devices will use CAPWAP (Controlling and Provisioning of Wireless Access Point, wireless access point control and supply) tunnel, CAPWAP tunnel is AC The communication control protocol between the device and the AP device defines how to communicate between the AC device and the AP device, and provides a general encapsulation and transmission mechanism for the interoperability between the AC device and the AP device. The wireless data frame is encapsulated in the CAPWAP tunnel and sent to the AC device as it is or after conversion from 802.11 to 802.3 format. [0003] To ensure the security of the CAPWAP tunnel, a DTLS (Datagram Tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/08H04L9/06H04L12/741H04L45/74
CPCH04L9/0631H04L45/745H04L63/0428H04L67/04
Inventor 龚海东方沛昱崔兴龙顾祥洪
Owner SUZHOU CENTEC COMM CO LTD