Rapid analyzing method for data pack

An analysis method and a technology of data packets, which are applied in network communication systems and application fields, can solve problems such as poor function scalability and poor flexibility, and achieve high-speed processing, reduced analysis processing cycles, and strong flexibility and scalability.

Inactive Publication Date: 2005-02-23
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the flexibility is poor, and once the design is completed, the function expansion is poor

Method used

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  • Rapid analyzing method for data pack
  • Rapid analyzing method for data pack
  • Rapid analyzing method for data pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Table I

[0041] entry content

Function description

Global Operations (OP0)

Global operation instructions, represented by different values:

processing completed

Discard the packet header of this layer

discard total packets

For IP fragmentation, the processing of the lower layer packet index value

Length calculation (OP1)

The calculation method of the length of the protocol header of this layer, represented by different values:

do nothing

with a predefined fixed length

Take the lower 4 bits of the length field in the protocol header of this layer and multiply it by 4

Take the upper 4 bits of the length field in the protocol header of this layer and multiply it by 4

For Multiprotocol Label Switching protocol header

Index operation (OP2)

Lower layer header index operation, different values ​​indicate:

do nothing

Use the PT domain va...

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PUM

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Abstract

The method adopts application specific IC based on lookup table to extract and analyze packet header information. It includes following steps: 1) after the packet is analyzed and extracted according to packet header position and information extraction operation table, the key word of data packet is generated; 2) after completing the analysis and extraction of data packet, according to the generating rule of looking up key word the lookup key word is generated. The invention can modify analysis method for packet and define new processing method for type of protocol header by modifying relevant content of rule list.

Description

technical field [0001] The invention belongs to the field of network communication system and application technology, and specifically relates to a data packet analysis and information extraction method, which is suitable for processing data packets in network devices such as network processors, routers, and switches. Background technique [0002] As the scale of the Internet continues to grow, there are more and more services. Due to the increasing network data traffic, network equipment is required to have efficient and fast data packet analysis and processing technology to provide users with reliable services. [0003] Currently, there are mainly two methods for analyzing network data packets. One is to adopt the software processing mode, and its basic idea is based on the multi-simple instruction set CPU architecture mode, which is composed of multiple peer CPUs, and different programs are written for it according to the design requirements to complete different functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30H04L29/06
Inventor 杨宗凯黄建钟名奇
Owner HUAZHONG UNIV OF SCI & TECH
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