A method, device and request end for realizing exception handling
An exception handling and request-side technology, applied in digital transmission systems, data exchange networks, electrical components, etc., can solve problems such as connection denial of service, affecting the performance of industrial automation networks, and achieve the effect of improving performance and avoiding network resource waste.
Active Publication Date: 2020-11-10
BEIJING LEADSEC TECH +1
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Problems solved by technology
[0004] Although the industrial firewall discards the packets that are determined to be illegal, it can improve the security of the industrial automation network; but when discarding the packets that do not meet the requirements such as format and length, the requesting end does not know that the packets are determined to be illegal. In this case, it will continue to retransmit, and the connection will stop after the timeout; the requester cannot correct the format and length of the message in time; if the illegal message is for malicious attacks, the industrial firewall will only The discarding processing method, failure to handle connection interruption in time will cause a large number of connection denial of service in a short period of time, affecting the performance of the industrial automation network
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[0054]In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0055] figure 1 A flow chart of the method for realizing exception handling in the present invention; as figure 1 shown, including:
[0056] Step 100, performing corresponding exception processing on each determined illegal message;
[0057] It should be noted that the illegal message of the present invention can be an illegal message determined by the filtering device; for example, an illegal message that does not exist in the data handle determined by the filtering device, an illegal message that the memory of the receiving end is not enough to process, and a data format ...
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The invention discloses a method and device for achieving the abnormality processing, and the method comprises the step: carrying out the corresponding abnormality processing of each determined illegal message. The method is used for the abnormality processing of illegal messages, thereby solving problems caused by only discarding processing. Furthermore, an abnormal replay message is transmitted, so the corresponding messages can be processed correspondingly, thereby improving the performance of an industrial automatic network. A transmission control protocol_reset connection message (TCP_RST) is transmitted, thereby avoiding the network resource waste caused by repeated transmission.
Description
technical field [0001] The invention relates to the field of industrial automation, in particular to a method, device and request end for realizing exception handling. Background technique [0002] The Ethernet Industrial Protocol (EtherNet / IP) is a protocol system suitable for industrial environment applications. It is established by the Open Device Net Vendors Association (ODVA) and Control Net International (Control Net International). A new member co-launched by Industrial Networking Group. EtherNet / IP is a network specially designed for industrial automation applications. It is widely used in industrial control fields such as tobacco, electric power, and automobiles. It can support the connection of a large number of field devices in a wide area. Different from the source / destination communication mode, EtherNet / IP adopts the production / consumption mode, which allows nodes on the network to simultaneously access the data of the same source; in the production / consumptio...
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IPC IPC(8): H04L12/24
CPCH04L41/06H04L41/069
Inventor 闫东川孟庆森张帅
Owner BEIJING LEADSEC TECH