Data integration method of intelligent industrial control network based on mirror port parsing
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A technology of industrial control network and data integration, applied in bus network, comprehensive factory control, data exchange network, etc., can solve the problems of basic industrial facilities safety hazards, no hidden dangers, etc., and achieve the effect of strong feasibility and reduction of communication links
Inactive Publication Date: 2017-08-15
上海三零卫士信息安全有限公司
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Therefore, each factory uses a large number of foreign control equipment, and the communication protocols used by these control equipment are different. In addition to normal industrial data communication, each communication protocol also includes equipment status data communication and possible programs. Backdoor data, these protocol texts are only publicly disclosed in a small amount. When we use these devices, we only consider how to use their functions, and do not consider the hidden dangers they may bring. Therefore, once these industrial control devices are exposed to the Internet , will inevitably bring great hidden dangers to the safety of our country's basic industrial facilities
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example 1
[0041] Example 1, a data frame in the FINS protocol:
[0042] First, write 39 to the DW100 data on the host computer page, and at the same time capture the data through the mirror port, you can get the following data packets:
[0043] FINS protocol header: 46 49 4e 53 00 00 00 1e 00 00 00 02 00 00 00 00
[0044] FINS data segment: 80 00 02 00 01 00 00 ef 00 00 01 02 82 00 64 00 00 02 00 0042 1c
[0045] The most important part of it is as follows:
[0046] Memory write command: 01 02
[0047] Area Code: 82
[0048] Starting address: 00 64
[0049] Corresponding value: 00 00 42 1C
[0050] Parsing result: 00 64 converted to decimal is 100, the data type corresponding to the area code is Dword, 00 00 42 1C is 39 through the float hexadecimal parsing algorithm. The instrument corresponding to this value in the PLC is temperature, so the temperature data of a certain environment on site can be obtained through analysis of the mirror port.
example 2
[0051] Example 2: A data frame in the S7 protocol:
[0052]First, write 13 to the data of DB2.DBD0 on the host computer page, and at the same time capture the data packets through the mirror port, and the following data packets can be obtained:
[0055] The most important part of it is as follows:
[0056] Function code type: 02
[0057] Data block address: 00 02
[0058] Area code: 84 00
[0059] Data offset address: 00 00
[0060] Corresponding value: 41 50 00 00
[0061] Analysis result: 00 02 is resolved to DB2, the offset address is resolved to 0, and the corresponding value is resolved to 13. The instrument corresponding to this value in the PLC is the liquid level height, so the liquid level data of a certain environment on site can be obtained through the analysis of the mirror port .
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Abstract
The invention relates to a data integration method of an intelligent industrial control network based on mirror port parsing. The method comprises the following steps: after realizing a capture function of a mirror port by configuring a mirror function for a switch, reading data; creating a connection, aggregating the captured data to the connection, and taking a TCP state machine or timeout 300S as a timeout flag of the connection; determining a connected client and a server; comparing characteristic values of protocol headers and determining the protocol categories; selecting different protocol parsing algorithms according to a protocol function code; and performing data display and data storage. The data integration method of the intelligent industrial control network based on the mirror port parsing provided by the invention has the following beneficial effects: the method collects the data from a network layer to avoid the attack of a host computer; real-time data of a plurality of PLCs can be collected synchronously, and the data can efficiently enter a same data platform; and besides, the existing method of collecting different PLC data through different host computers and sending the PLC data out is replaced, so that the communication links are reduced and a highly feasible new means is provided for the basic collection part of factory big data.
Description
technical field [0001] The invention relates to an industrial control network big data acquisition technology, in particular to an intelligent industrial control network data integration method based on mirror port analysis. Background technique [0002] Intelligent manufacturing is a general term for advanced manufacturing processes, systems and models that are based on the new generation of information technology and run through all aspects of manufacturing activities such as design, production, management, and service. . The core element of intelligent manufacturing is from intelligent design, intelligent control, intelligent operation to intelligent decision-making, and the interconnection of data through networking. [0003] The existing industrial control security solutions on the market have limitations, and there is a large deviation from the real needs of users. Therefore, each factory uses a large number of foreign control equipment, and the communication protoco...
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