CN113572830A - Address allocation method, address allocation system, and computer-readable storage medium - Google Patents
Address allocation method, address allocation system, and computer-readable storage medium Download PDFInfo
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- CN113572830A CN113572830A CN202110808667.4A CN202110808667A CN113572830A CN 113572830 A CN113572830 A CN 113572830A CN 202110808667 A CN202110808667 A CN 202110808667A CN 113572830 A CN113572830 A CN 113572830A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
Abstract
The invention relates to the technical field of network communication, and particularly provides an address allocation method, an address allocation system and a computer-readable storage medium. The address allocation method provided by the invention is operated by a plurality of service devices in an address allocation system at the same time, and specifically comprises the following steps: step S1, the current service equipment receives the address allocation request sent by the client; step S2, calculating a target service device corresponding to the client information of the client by the current service device; step S3, if the target service equipment is the current service equipment, the current service equipment distributes IP address for the client, if the target service equipment is not the current service equipment, the current service equipment forwards the client information to the target service equipment; in step S4, the IP address assigned to the client is returned to the client.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to an address allocation method, an address allocation system, and a computer-readable storage medium for a dynamic host configuration protocol.
Background
A Dynamic Host Configuration Protocol (DHCP) is generally applied in a large-scale local area network environment, and mainly functions to centrally manage and allocate IP addresses, so that hosts in the network environment can dynamically obtain information such as IP addresses, gateway addresses, DNS server addresses, and the like.
In the process of allocating the IP address through the dynamic host configuration protocol, the service device provides the service of allocating the IP address for the client, but in a large-scale user scenario, the performance that a single service device can provide is limited, and more service devices need to be expanded to improve the service performance and the service efficiency.
In the prior art, a dynamic host configuration protocol failover (DHCPFailover) policy proposes to simultaneously deploy two service devices, share service information between the two service devices, and balance service loads. However, due to the limitation of a fault transfer mechanism, the system can only operate between two service devices and cannot be expanded to more devices; moreover, the balancing service requires that the request information of the client must be sent to two service devices to realize load balancing.
In RFC3074 protocol document, a method for load balancing DHCP service devices is also proposed, that is, a device dedicated for load balancing is deployed, and the load balancing device distributes request information of a client to a plurality of DHCP service devices in a balanced manner, that is, each service device serves a designated part of clients. However, in this mode, if one service device fails, the client under the responsibility of the service device cannot obtain the address assignment service. Moreover, the operation and maintenance of the load balancing device also causes certain cost problems.
Therefore, it is desirable to provide a technical solution that can implement load balancing among multiple DHCP service devices and can avoid the problem that a failure of a single service device affects normal address acquisition of part of clients.
Disclosure of Invention
In view of the above problems, the present invention provides an address allocation method, an address allocation system, and a computer readable storage medium for dynamic host configuration protocol, which can achieve load balancing among a plurality of DHCP service devices, and simultaneously establish a connection among the plurality of service devices, and even if a single service device fails to provide a service, can allocate the work of the service device to other service devices in a balanced manner, thereby further ensuring the performance and efficiency of the address allocation service.
The technical scheme of the invention provides an address allocation method, wherein the address allocation method is operated by a plurality of service devices in an address allocation system at the same time, and specifically comprises the following steps:
step S1, the current service equipment receives the address allocation request sent by the client;
step S2, calculating a target service device corresponding to the client information of the client by the current service device;
step S3, if the target service device is the current service device, the current service device allocates an IP address to the client,
if the target service equipment is not the current service equipment, the current service equipment forwards the client information to the target service equipment;
in step S4, the IP address assigned to the client is returned to the client.
According to the address allocation method provided by the technical scheme of the invention, through a plurality of service devices which run simultaneously, when a large-scale user is confronted, efficient response of the address allocation service can be ensured. And the address allocation tasks of the client can be evenly allocated to each service device through a preset algorithm. Meanwhile, each service device is not completely isolated, and when the target service device corresponding to the received client information is not the current service device, the received client information is forwarded to the corresponding target service device, so that the address allocation request of the client is prevented from being empty. The address allocation method realizes load balance among a plurality of service devices, and simultaneously ensures that the service devices keep communication so as to realize cooperative cooperation without depending on the load balance device.
Preferably, in the technical solution of the present invention, in step S2 of the address allocation method, a hash mapping method is used to calculate a target service device corresponding to the client information, a key value used by the hash mapping method is the client information, and a mapping value used by the hash mapping method is the target service device. The client information corresponds to the target service equipment through Hash mapping, so that the uniqueness of the target service equipment corresponding to the client can be ensured, namely, the service equipment providing the address allocation service for the client is the same when the client sends the address allocation request each time.
In the preferred embodiment of the present invention, the address allocation method further comprises
Step S5, judging whether the client has distributed the IP address with the unexpired lease, if yes, the current service equipment directly returns the distributed IP address with the unexpired lease to the client; if not, step S2 is executed.
DHCP address assignment carries a lease, that is, after an IP address is assigned to a client, the client is not able to permanently use the IP address, but has a time limit specified by the lease. If the lease expires after the time limit is exceeded, the IP address does not belong to the client any more, and the IP address needs to be renewed or reallocated; if the time limit is not exceeded, i.e. the lease is not expired, the IP address does not need to be reassigned, and only the assigned lease unexpired IP address needs to be returned to the client.
Preferably, in the technical solution of the present invention, step S3 in the address allocation method further includes
Step S31, if there is no idle IP address in the current service device, the current service device forwards the client information to other service devices.
Through the forwarding step, the situation that the IP address cannot be allocated to the client due to insufficient IP address managed in a certain service device because the flow is excessively concentrated in the certain service device can be effectively avoided; meanwhile, the cooperation relationship among the service devices can be better strengthened, and the load balance is realized.
In the preferred embodiment of the present invention, the address allocation method further includes
Step S6, after the current service device completes address assignment of the client, the current service device synchronously sends the client information and the IP address assigned to the client to other service devices.
In other words, each service device can receive and store all client IP address allocation information, so that when a client address allocation request is received, whether the client has allocated an IP address with a lease unexpired is judged first, repeated requests are avoided, uniqueness of the client IP address is guaranteed, steps of judging and analyzing the client information are simplified, and overall efficiency of the address allocation system is improved.
Further, in the technical solution of the present invention, the address allocation method further includes
Step S7, the current service equipment sends heartbeat packets to other service equipment regularly or irregularly, and receives heartbeat packets sent by other service equipment;
in step S8, if the current service device detects that the heartbeat packet of one or more of the other service devices is abnormal, the service device is excluded from the mapping value.
In order to avoid that the fault of a single service device affects the response of the address allocation request of a part of clients, the state of each service device is monitored in real time through the heartbeat packet mechanism. When a certain service device fails, the address assignment request of the client is excluded from the mapping value, so that the address assignment request of the client is not assigned to the service device any more, and the address assignment request of the client responsible for the service device can be evenly assigned to other service devices. Furthermore, when a new service device is added to the address allocation system, the new service device can be connected with the original service device quickly by sending the heartbeat packet, so that the capacity expansion of the service device can be realized conveniently and quickly.
In the technical solution of the present invention, there is also provided an address allocation system, including a plurality of service devices, where the current service device stores therein instructions for performing the following operations:
step S1, receiving an address allocation request sent by a client;
step S2, calculating a target service device corresponding to the client information of the client;
step S3, if the target service equipment is the current service equipment, the current service equipment distributes IP address for the client, if the target service equipment is not the current service equipment, the current service equipment forwards the client information to the target service equipment;
in step S4, the IP address assigned to the client is returned to the client.
The address allocation system comprises a plurality of service devices and can provide address allocation service for large-scale clients. Each service device is responsible for address allocation service of a part of clients, and corresponding allocation between the clients and the service devices can be realized through cooperation between the service devices and the service devices without additionally arranging load balancing devices for adjustment. Moreover, communication is kept among the service devices, and information synchronization is realized, so that the condition that the response of the address service system to the address allocation requests of the partial clients is influenced by the fault of a single service device is avoided.
In the technical solution of the present invention, a computer-readable storage medium is further provided, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the address allocation method can be implemented to implement balanced load among a plurality of service devices working simultaneously.
Drawings
Fig. 1 is a schematic diagram of an address allocation method provided in a first embodiment of the present invention;
fig. 2 is a schematic diagram of another address allocation method provided in the first embodiment of the present invention;
fig. 3 is a schematic diagram of an address allocation method provided in a second embodiment of the present invention;
FIG. 4 is a schematic diagram of another address assignment method provided in a second embodiment of the present invention;
fig. 5 is a schematic diagram of a heartbeat packet of an address allocation method provided in a third embodiment of the present invention;
FIG. 6 is a diagram illustrating an exception to a heartbeat packet in another address assignment method provided in a third embodiment of the present invention;
fig. 7 is a schematic diagram of an address assignment system provided in a fourth embodiment of the present invention.
Reference numerals: 1-address assignment system, 2-service device, 21-current service device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present 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 invention without any creative effort belong to the protection scope of the present invention.
[ first embodiment ]
As shown in fig. 1, a first embodiment of the present invention provides an address allocation method, where the address allocation method in this embodiment is executed by multiple service devices in an address allocation system at the same time, and specifically includes:
step S1, the current service equipment receives the address allocation request sent by the client;
step S2, calculating a target service device corresponding to the client information of the client by the current service device;
step S3, if the target service device is the current service device, the current service device allocates an IP address to the client,
if the target service equipment is not the current service equipment, the current service equipment forwards the client information to the target service equipment;
in step S4, the IP address assigned to the client is returned to the client.
When providing address allocation service, the Dynamic Host Configuration Protocol (DHCP) adopts client/server architecture, and the address dynamic allocation task of the server is driven by the client. That is, when the DHCP server, i.e. the service device, receives the information requesting to allocate an address from the client, it will send the relevant address configuration and other information to the client, so as to implement dynamic configuration of the address information of the client. And in order to ensure uniqueness, when address allocation is carried out, any IP address needs to be ensured to be used by only one client at the same time. The client can send an address allocation request to the server in a unicast or broadcast mode, and the unicast, namely the address allocation request, is sent to a certain server; the broadcast means that the address allocation request is sent to a plurality of service terminals, the plurality of service terminals all respond, and the client receives the response information returned fastest. Especially in the broadcast mode, the server side with faster response or closer to the position with dense request of the client side has larger load, while the server side with slower response or farther from the request information center has long-term idle, and the load difference between the server sides is large, so that the load balancing is difficult to realize.
In the address assignment method provided in this embodiment, the current service device may be any service device that receives an address assignment request sent by a client. After the current service equipment receives the request, the target service equipment corresponding to the client information is obtained through calculation and analysis of the client information, and whether the current service equipment is the target service equipment corresponding to the client information is verified. Through a computing mechanism, each client corresponds to a specified target service device, and similarly, each service device only needs to provide address allocation service for the specified client. Therefore, the client requests are prevented from being concentrated on part of the service equipment, so that the service equipment is prevented from overloading, the working efficiency is reduced, and even errors or faults are generated; and the other part of service equipment only works a little or even is completely idle, so that the overall address distribution system is unevenly loaded and is inefficient.
Then according to the verification result, if the target service equipment is current service equipment, the current service equipment allocates an IP address for the client; and if the target service equipment is not the current service equipment, the current service equipment forwards the client information to the target service equipment. The service equipment can not only judge the working range of the service equipment, but also exchange information with other service equipment so as to improve the response efficiency of the whole address allocation system. In the mode of client information unicast, if the client information is sent to the non-target service equipment, the current service equipment forwards the client information to the target service equipment, and the client request is effectively prevented from falling empty.
Preferably, in the address assignment method provided in the embodiment of the present invention, in step S2, the target service device corresponding to the client information is calculated by using a hash mapping method, a key value used by the hash mapping method is the client information, and a mapping value used by the hash mapping method is the target service device. The hash mapping calculation logic is to obtain a mapping value corresponding to a key value through the operation of the key value. In this embodiment, the target service device corresponding to the client information is obtained through the operation on the client information. The Hash mapping mode can also ensure that the address distribution service provided for one client is the same service equipment every time, thereby ensuring the uniqueness of the target service equipment corresponding to the client. The client information may be a unique identity such as a User Identifier (UID) and a local area network address (MAC) of the client.
Preferably, as shown in fig. 2, the address allocation method provided in the first embodiment of the present invention further includes
Step S5, judging whether the client has distributed the IP address with the unexpired lease, if yes, the current service equipment directly returns the distributed IP address with the unexpired lease to the client; if not, step S2 is executed.
In a Dynamic Host Configuration Protocol (DHCP), an IP address assigned to a client is not permanent, and the IP address assigned to the client carries a lease. Lease limits the service life of the client using the IP address, and after the service life is exceeded, the IP address can be recovered and redistributed; if the client wants to use the IP address continuously, a renewal request is sent to renew for prolonging the service life before the service life is exceeded.
In this embodiment, before allocating an IP address to a client, a service device determines whether the client has already allocated an IP address with a lease unexpired, which can effectively improve the working efficiency of the service device and avoid the waste of IP addresses due to repeated allocation. When the service equipment finds that the client is allocated with the IP address and the lease of the IP address is not expired, the service equipment directly returns the IP address to the client without subsequent calculation and analysis; when the service equipment finds that the client is allocated with the IP address but the lease of the IP address is expired or the client is allocated with the IP address, the service equipment analyzes and calculates the client information and allocates the IP address to the client.
[ second embodiment ]
The second embodiment of the present invention is a further preferred embodiment based on the first embodiment, and as shown in fig. 3, step S3 of the address assignment method provided in the present embodiment further includes
Step S31, if there is no idle IP address in the current service device, the current service device forwards the client information to other service devices.
In a plurality of service devices that complete the address assignment, each service device is assigned a certain number of IP addresses for subsequent assignment to clients. As the address assignment task proceeds, the IP addresses managed in the service devices with heavy traffic may be exhausted, so that the IP addresses managed in a certain service device are insufficient and cannot be assigned to the client. Therefore, the step of forwarding the client information to other service devices can avoid the problem caused by the fact that the flow is excessively concentrated on a certain service device, so that the cooperation relationship between all the service devices can be better strengthened, the load balance is realized, meanwhile, the problem that the service devices with exhausted addresses are singly sent by the client information can be prevented from being incapable of obtaining responses, and the cooperation relationship between all the service devices can be better strengthened.
Further, as shown in fig. 4, the address allocation method provided in the second embodiment of the present invention further includes
Step S6, after the current service device completes address assignment of the client, the current service device synchronously sends the client information and the IP address assigned to the client to other service devices.
Through the steps, each service device not only can store the IP address allocation information of the client responsible for the service device, but also can receive and store the IP address allocation information of the client in other service devices, and the sharing of the whole address allocation information is realized. When receiving a client address allocation request, the current service equipment can more accurately and comprehensively judge whether the client is allocated with an IP address with a lease unexpired, so that repeated requests are avoided, the uniqueness of the IP address of the client is ensured, the steps of judging and analyzing the client information are simplified, and the overall efficiency of an address allocation system is improved.
[ third embodiment ]
A third embodiment of the present invention is a preferable embodiment based on the first and second embodiments, and the address assigning method provided in this embodiment further includes
Step S7, the current service equipment sends heartbeat packets to other service equipment regularly or irregularly, and receives heartbeat packets sent by other service equipment;
in step S8, if the current service device detects that the heartbeat packet of one or more of the other service devices is abnormal, the service device is excluded from the mapping value.
As shown in fig. 5, while providing the address assignment service for the client, the multiple service devices may periodically or aperiodically send heartbeat packets to the other service devices to notify the other service devices of their own operating states; and receiving heartbeat packets sent by other equipment to confirm the working state of other service equipment. In the address allocation mode guided by the address allocation method in this embodiment, each client has a corresponding target service device for providing an address allocation service for the client, that is, the address allocation task of the corresponding client is provided by the target service device, and even if the client information corresponding to the address allocation requested by the client is received by another service device, the other service device forwards the client information to the target service device.
In order to avoid that the address allocation request of the corresponding client side is empty when the service equipment has a fault, if the heartbeat packet of one or more services is detected to be abnormal, the service equipment is excluded from the mapping value. As shown in fig. 6, if the heartbeat packet of the service device 2 is abnormal, the service device 2 is excluded from the mapping value of the hash mapping, that is, the service device 2 is no longer a target service device corresponding to any client information, and the client information originally corresponding to the service device 2 is forwarded to other service devices. Preferably, the client information originally corresponding to the client information is distributed to other multiple service devices in a balanced manner, so that the overall load balance is not affected by the failure of a single service device. The abnormal condition of the heartbeat packet includes, but is not limited to, abnormal information in the heartbeat packet sent by the service device, abnormal condition that the service device stops sending the heartbeat packet, and the like.
Furthermore, when a new service device is added, the new service device can be added into the mapping value of the hash mapping of the address allocation in a heartbeat packet mode, so that the service device can be conveniently added, and the balance load between the new service device and the original service device can be kept.
[ fourth embodiment ]
As shown in fig. 7, a fourth embodiment of the present invention provides an address assignment system 1, which specifically includes a plurality of service devices 2, including a current service device 21, where the current service device 21 stores therein instructions for performing the following operations:
step S1, receiving an address allocation request sent by a client;
step S2, calculating a target service device corresponding to the client information of the client;
step S3, if the target service device is the current service device 21, the current service device 21 allocates an IP address to the client, and if the target service device is not the current service device 21, the current service device 21 forwards the client information to the target service device;
in step S4, the IP address assigned to the client is returned to the client.
Through the above steps, the address allocation system 1 provided in the embodiment of the present invention can implement load balancing among a plurality of DHCP service devices, and establish connections among a plurality of service devices, so that even if a single service device fails to provide a service, the operation of the service device can be allocated to other service devices in a balanced manner, thereby further ensuring performance and efficiency of the address allocation service.
The fourth embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the address allocation method.
So far, the technical scheme of the invention has been described with reference to the attached drawings. However, it will be readily appreciated by those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments described above. Without departing from the principle of the invention, one skilled in the art can make equivalent changes or substitutions on the related technical features, and the technical solutions after the changes or substitutions will fall into the protection scope of the invention.
Claims (8)
1. An address allocation method, the address allocation method being run simultaneously by a plurality of service devices in an address allocation system, the address allocation method comprising:
step S1, the current service equipment receives the address allocation request sent by the client;
step S2, calculating a target service device corresponding to the client information of the client by the current service device;
step S3, if the target service device is the current service device, the current service device allocates an IP address to the client,
if the target service equipment is not the current service equipment, the current service equipment forwards the client information to the target service equipment;
and step S4, returning the IP address allocated to the client.
2. The address assigning method according to claim 1, wherein in step S2, the target service device corresponding to the client information is calculated by using a hash mapping method, the key value used by the hash mapping method is the client information, and the mapping value used by the hash mapping method is the target service device.
3. The address assignment method of claim 1, further comprising
Step S5, determining whether the client has been assigned an IP address with an unexpired lease, if yes, the current service device directly returns the assigned IP address with an unexpired lease to the client; if not, step S2 is executed.
4. The address assigning method according to claim 1, wherein the step S3 further comprises
Step S31, if there is no idle IP address in the current service device, searching for another service device with an idle IP address, and the current service device forwards the client information to the other service device.
5. The address assignment method of claim 1, further comprising
Step S6, after the current service device completes address allocation of the client, the current service device synchronously sends the client information and the IP address allocated to the client to other service devices.
6. The address assignment method of claim 2, further comprising
Step S7, the current service equipment sends heartbeat packets to other service equipment regularly or irregularly and receives heartbeat packets sent by other service equipment;
step S8, if the current service device detects that the heartbeat packet of one or more of the other service devices is abnormal, excluding the service device from the mapping value.
7. An address assignment system comprising a plurality of serving devices, wherein the address assignment system comprises a current serving device having stored therein instructions for:
step S1, receiving an address allocation request sent by a client;
step S2, calculating a target service device corresponding to the client information of the client;
step S3, if the target service device is the current service device, the current service device allocates an IP address to the client, and if the target service device is not the current service device, the current service device forwards the client information to the target service device;
and step S4, returning the IP address allocated to the client.
8. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the address allocation method according to any one of claims 1-6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110808667.4A CN113572830A (en) | 2021-07-16 | 2021-07-16 | Address allocation method, address allocation system, and computer-readable storage medium |
| PCT/CN2021/142220 WO2023284259A1 (en) | 2021-07-16 | 2021-12-28 | Address allocation method, address allocation system, and computer-readable storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110808667.4A CN113572830A (en) | 2021-07-16 | 2021-07-16 | Address allocation method, address allocation system, and computer-readable storage medium |
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| CN113572830A true CN113572830A (en) | 2021-10-29 |
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| WO (1) | WO2023284259A1 (en) |
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| CN114124887A (en) * | 2021-11-29 | 2022-03-01 | 牙木科技股份有限公司 | View query method of DNS (Domain name Server), DNS and readable storage medium |
| WO2023284259A1 (en) * | 2021-07-16 | 2023-01-19 | 牙木科技股份有限公司 | Address allocation method, address allocation system, and computer-readable storage medium |
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| CN101997920A (en) * | 2010-11-18 | 2011-03-30 | 中兴通讯股份有限公司 | DHCP lease processing method and device |
| CN102098354A (en) * | 2011-02-28 | 2011-06-15 | 北京星网锐捷网络技术有限公司 | Method and server for allocating dynamic host configuration protocol (DHCP) addresses |
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| US6871210B1 (en) * | 2000-09-05 | 2005-03-22 | International Business Machines Corporation | Automatic allocation of least loaded boot server to PXE client on a network VIA DHCP server |
| CN103312708B (en) * | 2013-06-07 | 2016-06-01 | 福建联迪商用设备有限公司 | A kind of IP establishing method based on lease file and system |
| CN110086886B (en) * | 2019-05-14 | 2021-12-31 | 北京天融信网络安全技术有限公司 | Dynamic session holding method and device |
| CN110730254B (en) * | 2019-10-14 | 2022-06-21 | 新华三信息安全技术有限公司 | Address allocation method, device, relay equipment and medium |
| CN113572830A (en) * | 2021-07-16 | 2021-10-29 | 牙木科技股份有限公司 | Address allocation method, address allocation system, and computer-readable storage medium |
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2021
- 2021-07-16 CN CN202110808667.4A patent/CN113572830A/en active Pending
- 2021-12-28 WO PCT/CN2021/142220 patent/WO2023284259A1/en unknown
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| CN101997920A (en) * | 2010-11-18 | 2011-03-30 | 中兴通讯股份有限公司 | DHCP lease processing method and device |
| CN102098354A (en) * | 2011-02-28 | 2011-06-15 | 北京星网锐捷网络技术有限公司 | Method and server for allocating dynamic host configuration protocol (DHCP) addresses |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023284259A1 (en) * | 2021-07-16 | 2023-01-19 | 牙木科技股份有限公司 | Address allocation method, address allocation system, and computer-readable storage medium |
| CN114124887A (en) * | 2021-11-29 | 2022-03-01 | 牙木科技股份有限公司 | View query method of DNS (Domain name Server), DNS and readable storage medium |
| CN114124887B (en) * | 2021-11-29 | 2023-09-05 | 牙木科技股份有限公司 | View query method of DNS server, DNS server and readable storage medium |
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| WO2023284259A1 (en) | 2023-01-19 |
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