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Method utilizing deep packet detection technology to carry out P2P network identification

A P2P network and technology technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., to achieve the effect of improving search efficiency, optimizing identification process, and being easy to implement

Active Publication Date: 2014-12-31
BEIJING SAPLING TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0011]c) Difficult to characterize encryption protocols

Method used

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  • Method utilizing deep packet detection technology to carry out P2P network identification

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Experimental program
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Embodiment 1

[0033] Embodiment 1 of the present invention provides a method for P2P network identification using DPI technology, including:

[0034] Step 202, constructing a regular expression that will characterize the recognition pattern, using a finite state machine FSM to represent the regular expression;

[0035] Step 204, using the binary tree data structure to store the state transition relationship in the finite state machine, so that each regular expression can be represented by a node in the binary tree;

[0036] Step 206, obtain the number of IP connections currently used on the host to be tested and the number of ports currently used, and calculate the difference between them;

[0037] Step 208, judging whether the absolute value of the difference is greater than the first threshold;

[0038] Step 210, if not, proceed to step 212; if yes, proceed to step 222;

[0039] Step 212, obtain the duration of all IP connections on the host to be tes...

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Abstract

The invention relates to a method utilizing the deep packet detection technology to carry out P2P network identification. According to the method, connection characteristics are firstly determined, a pertinent identification mode is further carried out, network identification modes under different conditions are effectively identified, and an identification result can be conveniently acquired, moreover, DPI processing is realized through a finite-state machine formed by a regular expression, searching is carried out through utilizing a binary tree, searching efficiency is improved, and a precise processing result is acquired. Through the method, the identification result in flow identification can be more accurately and rapidly acquired, the identification flow is greatly optimized, and the method can be more easily realized in equipment in the prior art.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for deep packet inspection. Background technique [0002] With the continuous development of new network applications based on the P2P (peer to peer) traffic model in recent years, the consumption of network bandwidth resources has been accelerating, and traditional online services have also been increasingly impacted and affected. P2P itself is a very good technology with broad application prospects, but at the same time P2P is also a very lethal technology. At present, most of the P2P-based applications are bandwidth-depleting download services, which exhaust the originally abundant access, convergence and backbone bandwidth resources, and the network links are often at full load, resulting in the deterioration of network service quality (packet loss Rate, delay and jitter are greatly increased), which greatly affects the development of some voice, video and gam...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/813H04L47/20
Inventor 苏长君郑曙光
Owner BEIJING SAPLING TECH
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