Zero-copy method for supporting link aggregation of multi-type network cards

Abstract

The invention relates to a zero-copy packing method, in particular to a zero-copy method capable of supporting multi-type network cards and realizing link aggregation. The zero-copy method comprises the following steps: A. a device interface is opened through an interface layer function in a buffer area; B. the buffer area is positioned in a user space; C. a buffer area queue is constructed; D. the interface layer function is mapped to the information of the control structure of the buffer area through an internal memory; E. the device interface is opened through a message interface layer function; and F. a newly established message pointer queue is applied, the message pointer is extracted out from the buffer area to put in the message pointer queue, and the message data in the message pointer queue is applied for processing. Due to the adoption of the layered structure, the prior application interface layer is divided into a buffer area interface layer being regardless of the buffer area structure of the concrete device and a message interface layer for extracting the message from the buffer area, the purpose for using the multi-type network cards in a mixed manner is achieved, and the software is convenient for transportation and the extension.

Description

technical field [0001] The invention relates to a zero-copy packet capturing method, in particular to a zero-copy method which can support multi-type network cards and realize link aggregation function. Background technique [0002] In a high-speed network environment, application software for interception and detection needs an efficient packet capture method, that is, a zero-copy packet capture method. In traditional zero-copy packet capture software, kernel drivers and application interface libraries are generally used Two-tier structure. The kernel driver is responsible for writing messages into the message buffer, and the application interface library is responsible for submitting the message buffer to the application. After the application software has processed the message, it will release the buffer through the application interface library so that the kernel driver can Write a new message to the buffer. [0003] In traditional zero-copy software, when an applicati...

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Problems solved by technology

[0005] With the development of application requirements, the existing technical solutions have the disadvantage of poor scalability, because many high-speed network packet processing applications require special customized network card hardware, on these customized network cards, the original Do some preprocessing for network packets. It is common to enhance an additional data structure in front of the original packet structure, or combine multiple small packets into a buffer

Due to the different message structures uploaded by different packet capture network cards, in the existing technical solutions, the application interface library treats the buffer and the message as a consistent data structure, resulting in a set of interface libraries that can only be used on one type of network card device It cannot solve the problem that an application uses multiple network cards

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