UDP data package transmission method

Abstract

The invention aims at providing a method for transmitting UDP data packet. By directly redirecting the non-native UDP data packet to the local network protocol stack to get treatment (not relying on network address conversion technology), balancing datagram socket load, reducing data copy transmission between an inner nuclear layer and a user layer, reducing the cost of complicated operations such as the construction of execution data packet in the network protocol stack, protocol encapsulation, a data link layer or a network layer forwarding information searching, etc., the method enhances efficiency of transmission and treatment of UDP data packet among modules inside the inner nuclear layer, and enhances efficiency of data transmission between the inner nuclear layer and the user layer operation program, realizes on-line high speed treatment of application gateway to UDP flow application layer data, fast forwarding of UDP data packet and support of large number of concurrent UDP conversation and assures the transparency of the application gateway to the communication source terminal and destination terminal.

Description

technical field [0001] The invention belongs to the technical field of computer network and data communication, and relates to a transmission method of a UDP (User Datagram Protocol) data packet, which can be used in equipment and software of an application gateway to improve the efficiency of the gateway in transmitting UDP data packets and processing its application layer data Efficiency, reducing system overhead and network latency. Background technique [0002] The application gateway usually adopts transparent proxy technology, acts as a middleman between the client and the server, receives the passing UDP data packets and redirects them to the local network protocol stack of the kernel layer, and the protocol stack performs protocol analysis on the data packets. Restore and extract the application layer data, then copy the application layer data from the kernel layer to the user layer through the datagram socket (Datagram Socket), and send it to the business program (s...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned technologies have the following major defects, which lead to a significant drop in the processing efficiency and capacity of the application gateway, and cannot meet the performance requirements in a network environment with high traffic bandwidth and a large number of concurrent sessions: The IP address and port fields are modified and the checksum needs to be recalculated, which has a certain impact on system performance; (2) NAT technology relies on session tracking, and a session table needs to be established to store information such as IP addresses and ports for each UDP session. The time and space overhead of session tracking and session table management tasks is heavy, which will seriously affect the performance of the system; (3) data is copied and transmitted between the kernel layer and the user layer multiple times, and data packets need to be rebuilt when sending data, Operations such as protocol encapsulation, data link layer or network layer forwarding information search, etc., will also seriously reduce system performance

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