Watchdog feeding method for embedded Linux equipment with anti-attack capability and driving module

Abstract

The invention discloses a watchdog feeding method for embedded Linux equipment with an anti-attack capability and a driving module. A watchdog comprises an initialization module, a dog feeding sub-module, a sub-module for inquiring whether a dog is fed or not, a dog feeding confirmation command receiving sub-module, a dog feeding confirmation command detection sub-module and an execution sub-module. The method comprises the steps: initializing watchdog hardware circuit, obtaining watchdog overflow time, shielding a function interface in the drive code; obtaining a counting variable and a firsttime interval, carrying out periodic dog feeding operation according to the first time interval, and sending a dog feeding command to an application program or not; and judging whether a dog feedingconfirmation command replied by the application program is received within a set second time interval, judging whether the value of the counting variable exceeds a set overtime number, and resetting and restarting the system by the watchdog when the watchdog overflow time is exceeded, so the anti-attack capability of the embedded Linux equipment in the Internet of Things is improved.

Description

technical field [0001] The invention relates to the technical field of embedded system security, in particular to a watchdog feeding method and a driving module of an embedded Linux device with anti-attack capability. Background technique [0002] With the development of the Internet of Things, the Linux system has become the most widely used operating system in embedded devices. There are more and more attacks on embedded Linux devices in the Internet of Things. Attacks generally cause the devices to lose their original functions. When a large number of embedded Linux devices are deployed in the Internet of Things system, if the devices are attacked and malfunction, the technical If personnel cannot repair it in time, the entire IoT system will be paralyzed, and the attack defense capability will be weak. Contents of the invention [0003] The object of the present invention is to provide a watchdog feeding method and a driver module for an embedded Linux device with ant...

AI Technical Summary

Problems solved by technology

There are more and more attacks on embedded Linux devices in the Internet of Things. Attacks generally cause the devices to lose their original functions. When a large number of embedded Linux devices are deployed in the Internet of Things system, if the devices are attacked and malfunction, the technical If personnel cannot repair it in time, it will lead to the paralysis of the entire Internet of Things system, and the ability to prevent attacks is weak

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