WO2016177276A1

WO2016177276A1 - Domain name resolution synchronizing method and apparatus

Info

Publication number: WO2016177276A1
Application number: PCT/CN2016/079809
Authority: WO
Inventors: 赵洪涛; 刘磊
Original assignee: 阿里巴巴集团控股有限公司; 赵洪涛; 刘磊
Priority date: 2015-05-04
Filing date: 2016-04-21
Publication date: 2016-11-10
Also published as: CN106210158B; CN106210158A

Abstract

Disclosed in the present invention are a domain name resolution synchronizing method and an apparatus, the method comprising: receiving the resolution result sent from an authority Domain Name Service (DNS) apparatus, the resolution result being sent after the resolution result cached inside the authority DNS apparatus is updated; sending the received resolution result to different public DNS apparatuses. In this way, when the authority DNS apparatus resolutes the domain name and generates a new resolution result, the new effective resolution result of the authority DNS apparatus is sent to public DNS apparatuses via a third apparatus between the authority DNS apparatus and the public DNS apparatuses. The insistence between the effective resolution results in the caches of the public DNS apparatuses and the effective resolution results in the authority DNS apparatus is guaranteed, the problem of delay of resolution result effective time caused by inconsistence of cache refreshing time in public DNS apparatuses is avoided, and resolution efficiency of public DNS apparatuses is effectively improved.

Description

Method and device for synchronizing domain name resolution

Technical field

The present application relates to the field of Internet information technology processing, and in particular, to a synchronization method and device for domain name resolution.

Background technique

With the development of Internet technology, people can locate a computer in the Internet through an Internet Protocol (English: Internet Protocol; abbreviation: IP) address, that is, when an IP address is obtained, it can be determined by the IP address. A computer on the Internet that corresponds to the IP address.

However, since the IP address is not easily remembered by people, it is proposed to replace the IP address with a domain name. However, the domain name cannot be directly accessed by the domain name corresponding to the computer corresponding to the IP address. Therefore, when obtaining a domain name, the domain name resolution process is required to convert the obtained domain name into an IP address; and the obtained IP address is used to access the computer corresponding to the IP address.

Domain name resolution generally relies on the domain name service (English: Domain Name Service; abbreviation: DNS) system to map domain names to IP addresses. The Domain Name Service System is a distributed database based on TCP/IP applications that provides translation between host names and IP addresses. Generally includes public DNS and authoritative DNS.

The public DNS, when receiving the domain name query request, queries the local cached parsing result; if the parsing result corresponding to the domain name included in the domain name query request is queried, the parsed result is returned to the user; if not yet queried If the domain name is included in the query request, the domain name to be queried is carried in the query request and sent to the upper layer DNS (for example, local DNS), and the upper layer DNS is requested to be included in the query request. The domain name is parsed. When receiving the query request, the DNS of the upper layer determines whether the domain name to be queried can be parsed, and if it can be directly parsed, returns the parsing result; if it cannot be directly parsed, the local cache parsing result is queried by querying the local cache. Determine whether the analysis result corresponding to the domain name can be determined.

If the domain name of the domain name is not yet queried, the domain name to be queried is carried in the query request and sent to the DNS of the upper layer. The above operations are performed in sequence, and the operation ends when the analysis result corresponding to the domain name is queried.

Authoritative DNS refers to a server that is authorized to parse a domain name, and has the function of authorizing the resolution result to other DNS. For example, the top-level server of the domain name com can authorize the authoritative server of the domain name ABC.com as NS.ABC.com. The authorized DNS sends the parsing result to the public DNS, so that the public DNS stores the parsed result received locally.

However, in practical applications, because the time of parsing the authoritative DNS of each public DNS is different, the parsing result obtained by the authoritative DNS has different effective time on different public DNSs, and there is a certain delay, which greatly reduces the domain name resolution of the public DNS. Analytical efficiency.

Summary of the invention

In view of this, the embodiment of the present application provides a method and a device for synchronizing domain name resolution, which are used to solve the problem that the analysis efficiency of the current public domain DNS for domain name resolution is low.

A method for synchronizing domain name resolution, comprising:

Receiving an analysis result sent by the authoritative domain name service DNS device, where the parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated;

The received parsing result is sent to a different public DNS device.

A synchronization device for domain name resolution, comprising:

a receiving unit, configured to receive an analysis result sent by the authoritative domain name service DNS device, where the parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated;

And a sending unit, configured to send the received parsing result to a different public DNS device.

The beneficial effects of the application are as follows:

The embodiment of the present application receives the parsing result sent by the authoritative domain name service DNS device, and the parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated; The parsing result is sent to different public DNS devices. In this way, when the authoritative DNS device resolves the domain name to generate a new parsing result, the third device between the authoritative DNS device and the public DNS device sends the newly validated parsing result in the authoritative DNS device to the public DNS device to ensure the public DNS. The analysis result that is valid in the device cache is consistent with the resolution of the valid DNS device. This prevents the delay in the validity of the analysis result due to the inconsistency of the cache refresh time in the public DNS device. This improves the public DNS device's domain name resolution. Analytical efficiency.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying for inventive labor.

FIG. 1 is a schematic flowchart of a method for synchronizing domain name resolution according to an embodiment of the present disclosure;

2 is a schematic structural diagram of a synchronization device for domain name resolution according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a synchronization system for domain name resolution according to an embodiment of the present disclosure.

detailed description

In order to achieve the purpose of the present application, an embodiment of the present application provides a method and a device for synchronizing domain name resolution, and receiving an analysis result sent by an authoritative domain name service DNS device, where the parsing result is that an analysis result of the internal cache of the authoritative DNS device occurs. The update is sent; the received parsing result is sent to a different public DNS device. In this way, when the authoritative DNS device resolves the domain name to generate a new parsing result, the third device between the authoritative DNS device and the public DNS device sends the newly validated parsing result in the authoritative DNS device to the public DNS device to ensure the public DNS. The analysis result that is valid in the device cache is consistent with the resolution of the valid DNS device. This prevents the delay in the validity of the analysis result due to the inconsistency of the cache refresh time in the public DNS device. This improves the public DNS device's domain name resolution. Analytical efficiency.

The various embodiments of the present application are further described in detail below with reference to the accompanying drawings. Obviously, The described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

FIG. 1 is a schematic flowchart of a method for synchronizing domain name resolution according to an embodiment of the present disclosure. The method can be as follows. The execution entity of the embodiment of the present application may be an application client or a third-party server, which is not limited herein.

Step 101: The third-party server receives the parsing result sent by the authoritative DNS device.

The parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated.

In step 101, the third-party server may perform information interaction with the authoritative DNS device, and may also perform information interaction with the public DNS device.

For example, a third-party server uses the Hypertext Transfer Protocol (English: Hypertext Transfer Protocol; abbreviation: HTTP) to exchange information with an authoritative DNS device; and uses HTTP to interact with public DNS devices.

Once the resolution result update occurs in the authoritative DNS device, the authoritative DNS device actively sends the updated parsing result to the third-party server.

In addition, when the third-party server obtains the domain name to be resolved, the domain name to be resolved is carried in the parsing production request and sent to the authoritative DNS device.

The parsing production request is used to request the authoritative DNS device to parse the domain name to be parsed and return an analysis result.

Specifically, when the third-party server receives the domain name to be resolved, the domain name to be resolved is carried in the parsing production request and sent to the authoritative DNS device, to request the authoritative DNS device to parse the domain name to be parsed. Returns the result of the analysis.

Specifically, when the third-party server receives the domain name to be resolved, the third-party server sends a parsing result query request to the authoritative DNS device, where the parsing result query request includes the domain name to be parsed, and the parsing result query request is used to determine the received waiting Whether the parsed domain name has the corresponding parsing result.

When the authoritative DNS device determines that the domain name to be resolved does not have a corresponding parsing result, the query result is sent to the third-party server. At this time, the third-party server carries the domain name to be parsed in the parsing production request and sends it to the authoritative DNS. device.

Upon receiving the parsing production request, the authoritative DNS device parses the domain name to be parsed, obtains the parsing result corresponding to the domain name to be parsed, and updates the parsing result in the cache.

At this time, the authoritative DNS device sends the parsing result corresponding to the domain name to be resolved to the third-party server.

In addition, since the authoritative DNS device parses the domain name to be parsed when receiving the parsing production request, obtains the parsing result corresponding to the domain name to be parsed, and updates the parsing result of the internal cache, then the authoritative DNS device The analysis result corresponding to the domain name to be resolved may be sent to the third-party server, or the updated analysis result may be sent to the third-party server.

That is to say, the parsing production request sent by the third-party server can be regarded as a trigger condition for the authoritative DNS device to send the parsing result to the third-party server.

It should be noted that the parsing result sent by the authoritative DNS device to the third-party server may be the parsing result currently in effect, or may be the parsing result that is valid within the set time range.

In addition, the manner in which the third-party server receives the parsing result sent by the authoritative DNS device may also be:

The third party server sends a query request to the authoritative DNS device in real time.

The query request is used to request the authoritative DNS device to send the updated parsing result.

The third party server receives the query result sent by the authoritative DNS device.

The query result includes an analysis result of the latest update of the authoritative DNS device.

It should be noted that “the latest updated parsing result” can be understood as an analysis result after an update operation that is closest to the time when the authoritative DNS device receives the query request.

Step 102: The third-party server sends the received parsing result to different public DNS devices.

In step 102, when the third-party server receives the parsing result sent by the authoritative DNS device, The received parsing result is sent to different public DNS devices by using HTTP.

In this way, for the parsing result in the internal cache of the public DNS device, updating the parsing results no longer depends on the set update time, but real-time updating according to the parsing result of the authoritative DNS device update obtained by the third-party server in real time, ensuring the public DNS. The parsing result that is valid in the device cache is consistent with the parsing result that is valid in the authoritative DNS device. This prevents the delay in the validity of the parsing result due to the inconsistency of the cache refresh time in the public DNS device. This effectively improves the public DNS for domain name resolution. Analytical efficiency.

Optionally, when the parsing result is sent to a different public DNS device, the method further includes:

And sending the received parsing result to the client device corresponding to each public DNS device, so that the client device stores the parsed result received locally.

Specifically, the received parsing result is sent to the client device corresponding to each public DNS device, including:

A heartbeat packet is sent to the client device corresponding to each public DNS device.

The heartbeat data packet is used to determine whether the client device is online.

Receiving the response data packet sent by the client device in the first set time range, and sending the received parsing result to the client device.

When the response packet sent by the client device is not received in the first set time range, the method further includes:

Sending a heartbeat data packet to the client device periodically, and sending the parsing result received in the second set time range to the client device when receiving the response data packet sent by the client device .

It should be noted that the first set time range may be determined according to the effective time of the heartbeat data packet, or may be determined according to actual needs; the second set time range is larger than the first set time range.

In other words, when it is determined that the client device is not online, the heartbeat data packet is periodically sent to the client device, and the third party service is received when the response data packet sent by the client device is received again. The device may receive the parsing result sent by the authoritative DNS device multiple times. Therefore, the third-party server may send the parsing result from the time when the client device is offline to the client device, and send the result to the client device to ensure the internality of the client device. The analysis result is consistent with the analysis result in the authoritative DNS device.

Receiving, by the solution of the embodiment of the present application, the parsing result sent by the authoritative domain name service DNS device, where the parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated; sending the parsing result received Give different public DNS devices. In this way, when the authoritative DNS device resolves the domain name to generate a new parsing result, the third device between the authoritative DNS device and the public DNS device sends the newly validated parsing result in the authoritative DNS device to the public DNS device to ensure the public DNS. The analysis result that is valid in the device cache is consistent with the resolution of the valid DNS device. This prevents the delay in the validity of the analysis result due to the inconsistency of the cache refresh time in the public DNS device. This improves the public DNS device's domain name resolution. Analytical efficiency.

FIG. 2 is a schematic structural diagram of a synchronization device for domain name resolution according to an embodiment of the present disclosure. The synchronization device includes: a receiving unit 21 and a transmitting unit 22, where:

The receiving unit 21 is configured to receive an analysis result sent by the authoritative domain name service DNS device, where the parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated;

The sending unit 22 is configured to send the received parsing result to different public DNS devices.

Optionally, the sending unit 23 is further configured to: when the received parsing result is sent to a different public DNS device, send the received parsing result to a client corresponding to each public DNS device. And causing the client device to store the parsed result received locally.

Specifically, the sending unit 23 is configured to send a heartbeat data packet to a client device corresponding to each public DNS device, where the heartbeat data packet is used to determine whether the client device is online;

Specifically, the sending unit 23 is further configured to not receive the foregoing in the first set time range. When the response packet sent by the client device is sent, the heartbeat data packet is periodically sent to the client device, and when the response data packet sent by the client device is received, the received device in the second set time range is received. The parsing result is sent to the client device.

Optionally, the synchronization device further includes: an obtaining unit 23, where:

The obtaining unit 23 is configured to obtain a domain name to be parsed, and send the domain name to be parsed in a parsing production request to an authoritative domain name service DNS device, where the parsing production request is used to request the authoritative DNS The device parses the domain name to be resolved and returns an analysis result.

The receiving unit 21 is configured to receive an analysis result sent by the authoritative DNS device, where the parsing result includes an analysis result corresponding to the domain name to be parsed.

It should be noted that the synchronization device in the embodiment of the present invention may be implemented in a hardware manner or in a software manner, which is not limited herein.

FIG. 3 is a schematic structural diagram of a synchronization system for domain name resolution according to an embodiment of the present disclosure. The synchronization system includes: an authoritative DNS device 31, a public DNS device 32, a synchronization device 33, and a client device 34 corresponding to the public DNS device, wherein:

The authoritative DNS device 31 is configured to send the updated parsing result to the synchronization device 33;

The synchronization device 33 is configured to receive the parsing result sent by the authoritative DNS device, where the parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated, and the parsing result is received. Sent to a different public DNS device 32.

In addition, the synchronization device 33 is further configured to send the received parsing result to the client device 34 corresponding to each public DNS device, so that the client device stores the parsed result received locally. .

Specifically, the synchronization device 33 is specifically configured to send a heartbeat data packet to the client device 34 corresponding to each public DNS device 32, where the heartbeat data packet is used to determine whether the client device 34 is online;

When the response packet sent by the client device 34 is received within the first set time range, the received parsing result is sent to the client device 34.

The synchronization device 33 is configured to periodically send a heartbeat data packet to the client device 34 when the response data packet sent by the client device 34 has not been received within the first set time range, and receive the heartbeat data packet. When the response packet sent by the client device 34 is sent, the parsing result received in the second set time range is sent to the client device 34.

The synchronization device 33 is further configured to: before receiving the parsing result sent by the authoritative DNS device 31, obtain the domain name to be parsed, and carry the domain name to be parsed in the parsing production request and send it to the authoritative DNS device 31, where The parsing production request is used to request the authoritative DNS device 31 to parse the domain name to be parsed and return an analysis result.

The synchronization device 33 is configured to receive an analysis result sent by the authoritative DNS device 31, where the analysis result includes an analysis result corresponding to the domain name to be resolved.

When the authoritative DNS device resolves the domain name and generates a new resolution result, the newly-resolved analysis result in the authoritative DNS device is sent to the public DNS device through the synchronization device between the authoritative DNS device and the public DNS device to ensure the public DNS device cache. The result of the validation is consistent with the resolution of the valid DNS device. This prevents the delay in the validity of the analysis result due to the inconsistency of the cache refresh time in the public DNS device. This improves the efficiency of domain name resolution for public DNS devices.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, apparatus (device), or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of a method, apparatus, and computer program product according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor or other programmable data processing device to produce a machine such that by computer or other The instructions executed by the processor of the programmable data processing device generate means for implementing the functions specified in one or more blocks of the flowchart or in a block or blocks of the flowchart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the present application has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

A method for synchronizing domain name resolution, comprising:

Receiving an analysis result sent by the authoritative domain name service DNS device, where the parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated;

The received parsing result is sent to a different public DNS device.
The method of claim 1, wherein when the received parsing result is sent to a different public DNS device, the method further includes:

And sending the received parsing result to the client device corresponding to each public DNS device, so that the client device stores the parsed result received locally.
The synchronization method of claim 2, wherein the sending the parsing result to the client device corresponding to each public DNS device comprises:

Sending a heartbeat data packet to a client device corresponding to each public DNS device, where the heartbeat data packet is used to determine whether the client device is online;

Receiving the response data packet sent by the client device in the first set time range, and sending the received parsing result to the client device.
The method of claim 3, wherein when the response packet sent by the client device has not been received within the first set time range, the method further includes:

Sending a heartbeat data packet to the client device periodically, and sending the parsing result received in the second set time range to the client device when receiving the response data packet sent by the client device .
The synchronization method according to any one of claims 1 to 4, further comprising: before receiving the parsing result sent by the authoritative DNS device, the method further comprising:

Obtaining the domain name to be resolved, and the domain name to be resolved is sent to the authoritative domain name service DNS device in the parsing production request, where the parsing production request is used to request the authoritative DNS device to the domain name to be parsed Parse and return the parsing result;

Receive the parsing result sent by the authoritative DNS device, including:

Receiving the parsing result sent by the authoritative DNS device, where the parsing result includes the parsing result corresponding to the domain name to be parsed.
A synchronization device for domain name resolution, comprising:

a receiving unit, configured to receive an analysis result sent by the authoritative domain name service DNS device, where the parsing result is sent after the parsing result of the internal cache of the authoritative DNS device is updated;

And a sending unit, configured to send the received parsing result to a different public DNS device.
A synchronization device according to claim 6 wherein:

The sending unit is further configured to: when the received parsing result is sent to a different public DNS device, send the received parsing result to a client device corresponding to each public DNS device, so that the sending The client device stores the parsed result received locally.
A synchronization device according to claim 7, wherein

The sending unit is configured to send a heartbeat data packet to a client device corresponding to each public DNS device, where the heartbeat data packet is used to determine whether the client device is online;

Receiving the response data packet sent by the client device in the first set time range, and sending the received parsing result to the client device.
A synchronization device according to claim 8 wherein:

The sending unit is further configured to periodically send a heartbeat data packet to the client device when the response data packet sent by the client device is not received within the first set time range, and receive the customer When the response packet sent by the end device is sent, the parsing result received in the second set time range is sent to the client device.
The synchronization device according to any one of claims 6 to 9, wherein the synchronization device further comprises: an acquisition unit, wherein:

The obtaining unit is configured to obtain the domain name to be resolved, and the domain name to be parsed is sent to the authoritative domain name service DNS device in the parsing production request, where the parsing production request is used to request the authoritative DNS device Parsing the domain name to be parsed and returning the parsing result;

The receiving unit is specifically configured to receive an analysis result sent by an authoritative DNS device, where The parsing result includes the parsing result corresponding to the domain name to be parsed.