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DNS (Domain Name System) query forwarding method

A technology of DNS query and query method, applied in the direction of transmission system, electrical components, etc., can solve the problems of unable to meet the requirements of high-performance DNS server, limit the number of forwarding queries per second, and limit the number of sockets, so as to improve DNS forwarding performance and reduce The effect of system call overhead and security

Active Publication Date: 2017-03-08
CHINA INTERNET NETWORK INFORMATION CENTER
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AI Technical Summary

Problems solved by technology

[0005] Traditional DNS analysis software, in order to ensure the randomness of the forwarding port, its forwarding performance has been limited, only between a few thousand to 10,000 QPS, which can no longer meet the needs of high-performance DNS servers
In order to ensure the randomness of the forwarding port, the traditional method needs to re-establish the socket for each DNS query. This method has the following two obvious shortcomings: 1. The system limits the process file descriptor resources, which limits the number of sockets created per unit time. Greatly limit the number of forwarded queries per second
2. The time overhead of the system call used to create the socket also greatly reduces the forwarding performance

Method used

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  • DNS (Domain Name System) query forwarding method

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Embodiment Construction

[0026] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0027] The present invention proposes a DNS forwarding query method, which comprises the following steps:

[0028] Step 101, system initialization;

[0029] Step 103, establishing n socket resource groups, each group has N socket resources, and both n and N are natural numbers;

[0030] Step 105, the n resource groups perform DNS forwarding query in rotation at a period T.

[0031] Wherein, each set of socket resource groups has ...

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Abstract

The invention provides a DNS (Domain Name System) query forwarding method, comprising the steps of S101, initializing a system; S103, establishing n socket resource groups, wherein each group comprises N socket resources; and S105, forwarding DNS query by the n resource groups in turn according to a cycle T. According to the method, multiple pieces of query are forwarded by multiplexing the same socket, the number of system socket descriptors used in unit time is reduced, under the limit of system process file descriptor resources, the more pieces of query can be forwarded, moreover, the system call cost resulting from establishing the sockets is reduced, and the forwarding frequency of the DNS is improved.

Description

technical field [0001] The invention relates to the DNS field, in particular to a DNS forwarding query method. Background technique [0002] DNS (Domain Name System, Domain Name System), a distributed database on the Internet as a mapping between domain names and IP addresses, enables users to access the Internet more conveniently, without having to remember IP numbers that can be directly read by machines. The process of finally obtaining the IP address corresponding to the host name through the host name is called domain name resolution (or host name resolution). [0003] The forwarding function is one of the important functions of DNS to realize query. The forwarding server will directly forward the DNS query to the downstream recursive server according to the specified forwarding strategy. After the recursive server completes the DNS recursive query, it will return the query result to the forwarding server, and the forwarding server will process the query result in orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12
CPCH04L61/4511H04L61/00
Inventor 李晓东李洪涛左鹏张海阔叶崛宇贺明杨学
Owner CHINA INTERNET NETWORK INFORMATION CENTER
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