Arithmetic system for check value of networked packet, and operational method thereof

Abstract

Operational module for check value composed of hardware in computer system carries out operation of check value for transferred or received network packets. Computer system let operational module for check value carry out operation of check value independently. When network packet is in transmission, the said module generates a first check value for the transmitting network packet based on calculation rule for check value. When receiving network packet, the said module generates a second check value for the transmitting network packet based on calculation rule for check value. Comparing the first and second check values generates a compared result provided for further processing the received network packet. The invention reduces working load of CPU, quickens speed for processing network packets correspondingly, increases network flux in unit time, and raises quality for transmission of network.

Description

technical field [0001] The invention relates to a checksum calculation system, in particular to a hardware device to calculate a network packet checksum (Checksum) calculation system and a calculation method thereof. Background technique [0002] With the advent of the Internet era, users can obtain the required information through the network. In order to confirm whether the data is damaged or lost during the network transmission, factors that change the content of the original data occur, the Checksum mechanism It is a commonly used verification method for network packet data transmission at present. [0003] In order to ensure the integrity of the network packet data during transmission, it is necessary to calculate the check value of the corresponding network packet data before transmission, and fill in a specific position in the network packet to transmit the network packet, and the receiving end receives the network packet After packaging, first obtain the check value...

AI Technical Summary

Problems solved by technology

[0003] In order to ensure the integrity of the network packet data during transmission, it is necessary to calculate the check value of the corresponding network packet data before transmission, and fill in a specific position in the network packet to transmit the network packet, and the receiving end receives the network packet After packaging, first obtain the check value in the network packet, and perform the same operation on the network packet data again to obtain its corresponding check value, and then compare whether the two check values ​​are the same to determine whether the network packet data is Complete, and the above process is only the basic principle of using the check value to verify the network packet data. In many existing network communication protocols (TCP / IP), the number of comparisons of the check value may need more than several times. For example, the TCP layer needs Once calculated, the IP layer also needs to be calculated again, etc., and these calculations and comparisons are performed by the central processing unit in the computer system to perform related calculations and comparisons, so a large amount of central processing unit resources are consumed. The processor is the core module in the computer system, if it occupies too many system resources, the efficiency of the computer system will decrease

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