Method and device for fragmenting message

Abstract

The invention provides a method and a device for fragmenting a message. By adopting a received data message processed by FPGA, a fragmenting information table entry is stored in an on-chip resource or an external memory of GPGA. The method comprises the following steps: comparing a characteristic value of the received fragmenting message with a characteristic value stored in the fragmenting information table entry; further judging whether the fragmenting message is a primary message or not if a consistent comparison result is acquired; storing primary message information into the fragmenting information table entry if the message is the primary message and sending the primary message; processing a subsequent fragmenting message which exists in the primary message according to a processing way of the received primary message and sending the processed subsequent fragmenting message; judging whether the primary message information of the subsequent fragmenting message exists or not if the message is the subsequent fragmenting message; processing in a processing way of the primary message if the primary message information of the subsequent fragmenting message exists, and sending the processed subsequent fragmenting message; storing the subsequent fragmenting message if the primary message information of the subsequent fragmenting message does not exist.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a message fragment processing method and device. Background technique [0002] At present, with the rapid development of the Internet, the number of users accessing the Internet continues to increase, the services they use are numerous, and the services and protocols for various services are becoming more and more detailed. High-density, high-forwarding performance frame-type network devices are increasingly being used in the field of Internet data transmission. [0003] During data transmission, when a packet arrives at a network device port, it is found that the maximum transmission unit MTU (Maximum Transmission Unit) is smaller than the IP packet, and the packet needs to be fragmented, and then the fragmented IP packets will reach their destinations , and recombine at the destination. Traditional packet filtering does not process all IP packet fragments, but only perfor...

AI Technical Summary

Problems solved by technology

[0004] For the existing high-density, high-forwarding performance frame-type network equipment, using the main control CPU or network controller to process the fragmented packets of the network equipment has the problem of insufficient performance.

By programming the CPU or network controller, the memory is used to cache subsequent fragmented messages and the first fragmented message information, and the processing method is not efficient

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