Method and device for storing domain name system records, method and device for parsing domain name

• US 8,874,718 B2
• Filed: 11/09/2012
• Issued: 10/28/2014
• Est. Priority Date: 04/04/2007
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Yang, Jian, Chen, Guoqiao, Wang, Lei
• Primary Examiner(s): NANO, SARGON N
• Application Number:
  US13/673,563
• Publication Number:
  US 20130066842A1
• Time in Patent Office: 718 Days
• Field of Search: 709/223, 709/226, 709/245, 707/10, 707/201
• US Class Current: 709/223
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/4552 Lookup mechanisms between a plurality of directories; Synchronisation of directories, e.g. metadirectories
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols

Abstract

A method for storing domain name system (DNS) records includes locally storing received DNS records needed to be stored. If the size of all the stored DNS records does not satisfy a preset storing threshold, a part of the stored DNS records are deleted to make the size of the remaining DNS records after deletion satisfy the storing threshold. A domain name parsing method, device, and server are also provided.

Claims

1. A method for storing domain name system (DNS) records, the method comprising:

sending a DNS query request to a DNS server, wherein the DNS query request carries at least one of a service identity (ID) and user information;

receiving a plurality of DNS records including at least one DNS record returned by the DNS server according to the DNS query request;

locally storing received DNS records that need to be stored; and

if a size of all the stored DNS records does not satisfy a preset storing threshold, deleting a part of the stored DNS records, wherein a size of the remaining DNS records after deletion satisfies the storing threshold.

2. The method for storing DNS records according to claim 1, wherein locally storing the received DNS records:

comprises locally storing newly received DNS records.

3. The method for storing DNS records according to claim 2, wherein locally storing the received DNS comprises locally storing newly received DNS records whose time-to-live (TTL) is not 0.

4. The method for storing DNS records according to claim 1, wherein the size of all the stored DNS records does not satisfy the preset storing threshold when the size of all the stored DNS records is greater than the preset storing threshold, and wherein the size of the remaining DNS records after deletion is not greater than the storing threshold.

5. The method for storing DNS records according to claim 1, wherein the size of all the stored DNS records does not satisfy the preset storing threshold when the size of all the stored DNS records is not smaller than the preset storing threshold and wherein the size of the remaining DNS records after deletion is smaller than the storing threshold.

6. The method for storing DNS records according to claim 1, wherein deleting the part of the stored DNS records comprises:

if expired DNS records exist, deleting the expired DNS records; and

if the size of the remaining DNS records still does not satisfy the storing threshold after deleting the expired DNS records, deleting other DNS records so that the size of the remaining DNS records after deletion satisfy the storing threshold.

7. The method for storing DNS records according to claim 6, wherein deleting the other DNS records comprises at least one of these processes:

deleting DNS records closest to expiration;

selecting and deleting a part of the DNS records from all the DNS records about multiple IP addresses corresponding to one domain name;

deleting DNS records in sequence following a storing order; and

deleting DNS records with low use rate.

8. The method for storing DNS records according to claim 1, wherein deleting the part of the stored DNS records comprises:

if expired DNS records do not exist, deleting the part of the DNS records to enable the size of the remaining DNS records after deletion to satisfy the storing threshold.

9. A device for storing domain name system (DNS) records, the device comprising:

a requesting unit configured to send a DNS query request to a DNS server, wherein the DNS query request carries at least one of a service identity (ID) and user information;

a receiving unit configured to receive a plurality of DNS records including at least one DNS record returned by the DNS server according to the DNS query request;

a storage unit, configured to store received DNS records needed to be stored;

a DNS record size detection unit, configured to detect whether a size of all the DNS records stored in the storage unit satisfies a preset storing threshold; and

a DNS record cleanup unit, configured to delete a part of the DNS records stored in the storage unit if the size of all the stored DNS records does not satisfy the storing threshold, wherein a size of remaining DNS records after deletion satisfy the storing threshold.

10. The device according to claim 9, wherein:

the DNS record size detection unit is specifically configured to compare the size of all the DNS records stored in the storage unit with the preset storing threshold; and

the DNS record cleanup unit is specifically configured to delete a part of the DNS records stored in the storage unit when the size of all the stored DNS records is greater than the storing threshold, so that the size of the remaining DNS records after deletion is not greater than the storing threshold.

11. The device according to claim 9, wherein:

the DNS record size detection unit is specifically configured to compare the size of all the DNS records stored in the storage unit with the preset storing threshold; and

the DNS record cleanup unit is specifically configured to delete a part of the DNS records stored in the storage unit when the size of all the stored DNS records is not smaller than the storing threshold, so that the size of the remaining DNS records after deletion is smaller than the storing threshold.

12. The device according to claim 9, wherein the device for storing domain name system (DNS) records is a terminal.

13. The device according to claim 9, wherein the DNS record cleanup unit is configured to determine that expired DNS records do not exist, and upon determining that the expired records do not exist, to delete the part of the DNS records to enable the size of the remaining DNS records after deletion to satisfy the storing threshold.

14. A method for storing domain name system (DNS) records, the method comprising:

sending a DNS query request to a DNS server, wherein the DNS query request carries at least one of a service identity (ID) and user information;

receiving a plurality of DNS records including at least one DNS record returned by the DNS server according to the DNS query request;

locally storing the received DNS records;

determining that a size of the locally stored DNS records does not satisfy a preset storing threshold; and

deleting a part of the locally stored DNS records, wherein a size remaining DNS records satisfies the storing threshold.

15. The method for storing DNS records according to claim 14, wherein locally storing the received DNS records comprises locally storing received DNS records with a time-to-live (TTL) that is not 0.

16. The method for storing DNS records according to claim 14, wherein deleting the part of the locally stored DNS records comprises:

determining that expired DNS records exist; and

deleting the expired DNS records.

17. The method for storing DNS records according to claim 16, further comprising:

after deleting the expired DNS records, determining whether a size of DNS records remaining after the deleting the expired DNS records does or does not satisfy the storing threshold; and

if the size of size of DNS records remaining after the deleting does not satisfy the storing threshold after deleting the expired DNS records, deleting a part of the DNS records remaining after the deleting the expired DNS records so that the size of remaining DNS records satisfies the storing threshold.

18. The method for storing DNS records according to claim 17, wherein deleting the part of the DNS records remaining after the deleting the expired DNS records comprises at least one of these processes:

deleting DNS records closest to expiration;

selecting and deleting DNS records that have multiple IP addresses corresponding to one domain name;

deleting DNS records in sequence following an order in which they were stored; and

deleting a DNS records with low use rate.

19. The method for storing DNS records according to claim 14, wherein deleting the part of the locally stored DNS records comprises:

determining that no expired DNS records are locally stored; and

deleting the part of the locally stored DNS records by performing at least one of these processes;

deleting DNS records closest to expiration;

selecting and deleting DNS records that have multiple IP addresses corresponding to one domain name;

deleting DNS records in sequence following an order in which they were stored; and

deleting DNS records with low use rate.

20. The method for storing DNS records according to claim 14, wherein deleting the part of the stored DNS records comprises:

if expired DNS records do not exist, deleting the part of the DNS records to enable the size of the remaining DNS records after deletion to satisfy the storing threshold.