CN111371921B - IP address recovery method, address pool management method and address pool management server - Google Patents
IP address recovery method, address pool management method and address pool management server Download PDFInfo
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- CN111371921B CN111371921B CN202010214890.1A CN202010214890A CN111371921B CN 111371921 B CN111371921 B CN 111371921B CN 202010214890 A CN202010214890 A CN 202010214890A CN 111371921 B CN111371921 B CN 111371921B
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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]
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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
- H04L61/5053—Lease time; Renewal aspects
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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
- H04L61/5061—Pools of addresses
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Abstract
The invention provides an IP address recovery method, an address pool management method and an address pool management server, wherein the address pool management method comprises the following steps: when a client returns an IP address to a DHCP server, the DHCP server inquires whether an IP address field corresponding to the IP address to be returned is deleted; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the IP address to be returned on an idle IP chain. The invention effectively solves the IP shock caused by deleting the IP address field, shortens the response time of the client for acquiring the IP address and reduces the consumption of the memory, the processor and the like of the server resource.
Description
Technical Field
The invention relates to the technical field of address management, in particular to an IP address recovery method, an address pool management method and an address pool management server.
Background
A Dynamic Host Configuration Protocol (DHCP) is generally applied in a large local area network environment for centrally managing and allocating IP addresses. The DHCP protocol adopts a client/server model, and the dynamic allocation task of the host address is driven by a network host; when the DHCP server receives the information of applying for the address from the network host, it will send the relevant address configuration information to the network host.
DHCP has three mechanisms to allocate IP addresses: 1) in an Automatic Allocation mode (Automatic Allocation), a DHCP server designates a permanent IP address for a host, and once a DHCP client is successfully leased to the IP address from the DHCP server for the first time, the address can be permanently used; 2) dynamic Allocation mode (Dynamic Allocation), the DHCP server assigns an IP address with a time limit to the host, and when the time expires or the host explicitly indicates to abandon the address, the address can be used by other hosts; 3) manual Allocation, the IP address of the client is specified by the network administrator, and the DHCP server simply informs the client host of the specified IP address. Among the three address allocation modes, only the addresses which are not needed by the client can be repeatedly used through dynamic allocation. Because the IP address resource is precious, most users access the Internet by adopting a mode of dynamically allocating IP addresses.
In the prior art, when a server receives an IP address request sent by a client, a legal IP address is searched from an address pool and provided for the client; however, due to the increase of the IP address fields and the increase of the IP addresses in the address pool, when the server searches for a legal IP address, the response time for the client to acquire the IP address is inevitably increased; meanwhile, when the DHCP is used to dynamically allocate IP addresses on a large scale, the management of adding and deleting a large number of IP address segments, allocating and recovering IP addresses, and the like will increase the consumption of the memory, processor, and the like of the server, thereby seriously affecting the operating efficiency of the system.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an IP address recovery method, an address pool management method and an address pool management server.
In order to achieve the purpose, the invention adopts the technical scheme that:
the first aspect of the present invention provides an IP address recovery method, where the IP address recovery method includes:
when a client returns an IP address to a DHCP server, the DHCP server inquires whether an IP address field corresponding to the IP address to be returned is deleted; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the IP address to be returned on an idle IP chain.
The second aspect of the invention provides an address pool management method, when a DHCP server allocates an IP address for a client, the DHCP server takes out an IP address from an idle IP chain to allocate to the client, and hangs the IP address on a used IP chain;
when a client returns an IP address to a DHCP server, the DHCP server inquires whether an IP address field corresponding to the IP address to be returned is deleted; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the IP address to be returned on an idle IP chain.
A third aspect of the present invention provides an address pool management server, where the address pool management server includes a memory and a processor, the memory includes an IP address recovery method program, and when the IP address recovery method program is executed by the processor, the steps of the IP address recovery method are implemented.
A fourth aspect of the present invention provides another address pool management server, where the address pool management server includes a memory and a processor, the memory includes an address pool management method program, and when the address pool management method program is executed by the processor, the steps of the address pool management method are implemented.
Compared with the prior art, the invention has prominent substantive characteristics and remarkable progress, particularly:
1) the invention provides an IP address recovery method and a corresponding address pool management server, which can recover IP addresses by inquiring the state of an IP address section corresponding to an IP address to be returned, the distributed IP count value of a structural body corresponding to the IP address section, a preset IP recovery mode and the like; the invention effectively solves the technical problem of IP oscillation caused by deleting the IP address field and reduces the influence of the recovered IP address on the whole IP management system;
2) the invention also provides an address pool management method and a corresponding address pool management server, the IP address recovered from the client is managed through the idle IP chain, and the IP address is distributed to the client, so that the response time of the client for acquiring the IP address is effectively shortened, the consumption of a memory, a processor and the like of server resources is reduced, the operation efficiency of the server is improved, and the method and the server are suitable for the address pool management of the central equipment in a cloud platform and a large-scale wireless networking.
Drawings
FIG. 1 is a process flow diagram of example 1 of the present invention.
Fig. 2 is a flow chart of IP address segment reclamation of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
Example 1
An IP address recovery method, comprising: as shown in fig. 1, when a client returns an IP address to a DHCP server, the DHCP server queries whether an IP address field corresponding to the IP address to be returned is being deleted; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the IP address to be returned on an idle IP chain.
It can be understood that each IP address field corresponds to an allocated IP count value, and each time the client returns an IP address to the DHCP server, if the IP address field corresponding to the to-be-returned IP address is being deleted, the allocated IP count value corresponding to the IP address field is decreased by one; and if the IP address field corresponding to the IP address to be returned is not in the deleting state, the distributed IP count value of the corresponding IP address field is not changed.
In this embodiment, when the DHCP server deletes a certain IP address field in the address pool, the following is performed: as shown in fig. 2, inquiring an allocated IP count value of a structure corresponding to an IP address field to be deleted, and if the allocated IP count value is equal to zero, immediately recovering the IP address field to be deleted; if the distribution IP count value is larger than zero, traversing an idle IP chain, recovering the IP address belonging to the IP address section to be deleted on the idle IP chain, and inquiring the current distribution IP count value of the structure corresponding to the IP address section to be deleted again; at the moment, if the current distributed IP count value is equal to zero, the IP address field to be deleted is immediately recycled; and if the current distributed IP count value is larger than zero, executing corresponding steps according to a preset IP recovery mode.
In this embodiment, the IP recovery method includes immediately recovering an IP address and delaying recovery of the IP address; when the preset IP recovery mode is to recover the IP address immediately, and the current distribution IP count value of the structural body corresponding to the IP address section to be deleted is inquired again, and the current distribution IP count value is still larger than zero, the DHCP server executes: and traversing the used IP chain, recovering all the IP addresses belonging to the IP address field to be deleted on the used IP chain, and then recovering the IP address field to be deleted. When the preset IP recovery mode is to delay the recovery of the IP address and query the current distribution IP count value of the structural body corresponding to the IP address section to be deleted again, and the current distribution IP count value is still larger than zero, the DHCP server executes: and setting the IP address field to be deleted to be in a deleting state, and recovering the IP address field to be deleted after all the IP addresses are automatically returned.
It should be noted that the IP address on each IP address field is generally divided into three parts, one part is an IP address that is not allocated on the IP address field to be deleted and is not hung on an idle IP chain, one part is an IP address allocated to the client, and the other part is an IP address hung on the idle IP chain. When a certain IP address field is deleted, different methods need to be adopted for the three IP addresses; wherein, the IP address which is not distributed and is not hung on the idle IP chain can be directly deleted; the IP address allocated to the client, namely the IP address hung on the used IP chain, needs to be completely recycled, and the IP address hung on the idle IP chain can be deleted only after being completely recycled.
The invention adopts different recovery methods aiming at the state of the IP address section corresponding to the IP address to be returned; when the IP address field is deleted, different recovery strategies are adopted aiming at different IP addresses; therefore, by the IP address recovery method, the technical problem of IP oscillation caused by deleting the IP address field is effectively solved, and the influence of the recovered IP address on the whole IP management system is greatly reduced.
Example 2
An address pool management method, the address pool management method comprising: when the DHCP server allocates the IP address for the client, the DHCP server takes out one IP address from the idle IP chain to allocate to the client, and the IP address is hung on the used IP chain. When a client returns an IP address to a DHCP server, the DHCP server inquires whether an IP address field corresponding to the IP address to be returned is deleted; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the to-be-returned IP address on an idle IP chain, as shown in fig. 1.
It should be noted that the IP address on each IP address segment is generally divided into three parts, and one part is an IP address that is not allocated on the IP address segment and is not hung on an idle IP chain; and one part is an IP address allocated to the client, the IP address allocated to the client can be hung on the used IP chain, and the IP address on the used IP chain cannot be reallocated to other clients so as to indicate the type to be convenient for management. The other part is the IP address hung on the idle IP chain, one part of the IP address hung on the idle IP chain comes from a certain IP address field, and one part of the IP address is from the IP address returned by the client.
In this embodiment, the idle IP chain provides a buffer space for the IP address to be allocated and the IP address recovered from the client. When the client needs to be allocated with the IP address, the invention directly takes out one IP address from the idle IP chain to allocate the IP address to the client, and does not need to take out a legal IP address from a large number of IP address segments in the address pool, thereby improving the IP address allocation efficiency and reducing the response time of the client for acquiring the IP address.
When the IP address is recovered from the client, the state of the IP address field corresponding to the IP address to be returned is determined, if the IP address field is deleted, the memory space occupied by the IP address to be returned is directly released, and the consumption of the IP address on the memory, the processor and the like of the server is reduced in time; if the IP address field is not in the deleted state, hanging the IP address to be returned on an idle IP chain so as to be directly allocated to the client next time; the IP address to be returned does not need to be returned to the corresponding IP address field in the address pool, and the memory space occupied by the IP address to be returned is released when the whole IP address field is deleted; therefore, the time for releasing the memory space occupied by the IP address to be returned is advanced, and the IP address recovery efficiency and the IP address allocation efficiency are improved.
This embodiment also provides a specific implementation manner of deleting a certain IP address segment, as shown in fig. 2. When the DHCP server deletes a certain IP address field in the address pool, executing: inquiring an allocation IP count value of a structural body corresponding to the IP address field to be deleted, and if the allocation IP count value is equal to zero, immediately recovering the IP address field to be deleted; if the distribution IP count value is larger than zero, traversing an idle IP chain, recovering the IP address belonging to the IP address section to be deleted on the idle IP chain, and inquiring the current distribution IP count value of the structure corresponding to the IP address section to be deleted again; at the moment, if the current distributed IP count value is equal to zero, the IP address field to be deleted is immediately recycled; and if the current distributed IP count value is larger than zero, executing corresponding steps according to a preset IP recovery mode.
It can be understood that, each time an IP address is taken from the IP address field and allocated to the client, the allocated IP count value of the corresponding IP address field is incremented by one; each time an IP address is taken from the IP address field and placed on the idle IP chain, the assigned IP count value corresponding to the IP address field is also incremented by one. When the client returns an IP address to the DHCP server every time, if the IP address field corresponding to the IP address to be returned is deleted, the distributed IP count value of the corresponding IP address field is reduced by one; and if the IP address field corresponding to the IP address to be returned is not in the deleting state, the distributed IP count value of the corresponding IP address field is not changed.
It should be noted that when a certain IP address segment is deleted, different methods need to be adopted for three IP addresses of the IP address segment; wherein, the IP address which is not distributed and is not hung on the idle IP chain can be directly deleted; the IP address assigned to the client belonging to the IP address field needs to be completely recycled, and meanwhile, the IP address hung on the idle IP chain belonging to the IP address field is also completely recycled, and the IP address field can be deleted.
In this embodiment, the IP recovery method includes immediately recovering an IP address and delaying recovery of the IP address; when the preset IP recovery mode is to recover the IP address immediately, the DHCP server executes: traversing the used IP chain, recovering all IP addresses belonging to the IP address field to be deleted on the used IP chain, and then recovering the IP address field to be deleted; when the preset IP recovery mode is to delay the recovery of the IP address, the DHCP server executes: and setting the IP address field to be deleted to be in a deleting state, and recovering the IP address field to be deleted after all the IP addresses are automatically returned.
It will be appreciated that the DHCP server assigns the client an IP address with a time limit that expires or is automatically returned when the client explicitly indicates that the IP address is discarded.
Further, when the user adds the IP address field, the IP address field is added into the address pool in a circular double-chain organization form; a certain number of IP addresses can be selected from the current IP address field and hung on an idle IP chain, and the available time can be selected again. That is, when the IP address on the idle IP chain is empty, the DHCP server takes one, two, or more than three IP addresses from a certain IP address segment in the address pool and hangs them on the idle IP chain, and the number of the taken IP addresses is not limited in this embodiment.
Further, the DHCP server hangs the to-be-returned IP address on an assigned position of an idle IP chain, and in order to increase security, the DHCP server may also hang the to-be-returned IP address on a certain position of the idle IP chain at random.
Example 3
This example differs from example 2 in that: when the DHCP server allocates the IP address for the client, the DHCP server can also directly take out an IP address from a certain IP address field in the address pool to allocate the IP address to the client, and hang the IP address on a used IP chain, thereby expanding the application range of the invention.
Further, the IP chain is used as a hash chain, so that the safety of IP address management is further improved.
Example 4
An address pool management server comprises a memory and a processor, wherein the memory comprises an IP address recovery method program, and the IP address recovery method program realizes the steps of the IP address recovery method when being executed by the processor.
Further, the address pool management server comprises an IP recovery module; the IP recovery module is used for inquiring whether an IP address field corresponding to the IP address to be returned is deleted or not according to the received IP returning request; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server directly releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the IP address to be returned on an idle IP chain.
Example 5
An address pool management server comprises a memory and a processor, wherein the memory comprises an address pool management method program, and the address pool management method program realizes the steps of the address pool management method when being executed by the processor.
Further, the address pool management server comprises an IP distribution module and an IP recovery module; the IP allocation module is used for taking out an IP address from an idle IP chain to allocate to the client according to the received IP using request and hanging the IP address on a using IP chain; the IP recovery module is used for inquiring whether the IP address field corresponding to the IP address to be returned is deleted or not according to the received IP returning request; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server directly releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the IP address to be returned on an idle IP chain.
Furthermore, the address pool management server also comprises an IP address field management module, a use IP address management module and an idle IP address management module; the IP address field management module is used for adding a new IP address field, deleting a certain IP address field and setting the state of each IP address field; the IP address management module manages the IP address which is being used by adopting an IP chain and calculates the current distributed IP count value; and the idle IP address management module manages the returned IP address, the IP address taken down from a certain IP address field in the address pool and allocates the IP address to the client by adopting an idle IP chain.
It should be noted that, when the IP address in the above embodiment may also be replaced by a network telephone number, the IP address is applied to a telephone number resource pool management system to implement allocation and recovery of the network telephone number.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (6)
1. An IP address recycling method, comprising:
when a client returns an IP address to a DHCP server, the DHCP server inquires whether an IP address field corresponding to the IP address to be returned is deleted; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the IP address to be returned on an idle IP chain;
When the DHCP server deletes a certain IP address field in the address pool, executing the following steps:
inquiring an allocated IP count value of a structural body corresponding to the IP address field to be deleted, and if the allocated IP count value is equal to zero, immediately recovering the IP address field to be deleted;
if the distribution IP count value is larger than zero, traversing an idle IP chain, recovering the IP address belonging to the IP address section to be deleted on the idle IP chain, and inquiring the current distribution IP count value of the structure corresponding to the IP address section to be deleted again; at the moment, if the current distributed IP count value is equal to zero, the IP address field to be deleted is immediately recycled; if the current distributed IP count value is larger than zero, executing corresponding steps according to a preset IP recovery mode;
the IP recovery mode comprises immediate recovery of an IP address and delayed recovery of the IP address;
when the preset IP recovery mode is to recover the IP address immediately, the DHCP server executes: traversing the used IP chain, recovering all the IP addresses belonging to the IP address field to be deleted on the used IP chain, and then recovering the IP address field to be deleted;
when the preset IP recovery mode is to delay the recovery of the IP address, the DHCP server executes: and setting the IP address field to be deleted to be in a deleting state, and recovering the IP address field to be deleted after all the IP addresses are automatically returned.
2. An address pool management method, characterized in that the address pool management method comprises:
when a DHCP server allocates an IP address for a client, the DHCP server takes out an IP address from an idle IP chain to allocate to the client, and the IP address is hung on a used IP chain;
when a client returns an IP address to a DHCP server, the DHCP server inquires whether an IP address field corresponding to the IP address to be returned is deleted; if the IP address field corresponding to the IP address to be returned is deleted, the DHCP server releases the memory space occupied by the IP address to be returned and modifies the distributed IP count value of the corresponding IP address field; otherwise, the DHCP server hangs the IP address to be returned on an idle IP chain;
when the DHCP server deletes a certain IP address field in the address pool, executing:
inquiring an allocation IP count value of a structural body corresponding to the IP address field to be deleted, and if the allocation IP count value is equal to zero, immediately recovering the IP address field to be deleted;
if the distribution IP count value is larger than zero, traversing an idle IP chain, recovering the IP address belonging to the IP address section to be deleted on the idle IP chain, and inquiring the current distribution IP count value of the structure corresponding to the IP address section to be deleted again; at the moment, if the current distributed IP count value is equal to zero, the IP address field to be deleted is immediately recycled; if the current distributed IP count value is larger than zero, executing corresponding steps according to a preset IP recovery mode;
The IP recovery mode comprises immediate recovery of an IP address and delayed recovery of the IP address;
when the preset IP recovery mode is to recover the IP address immediately, the DHCP server executes: traversing the used IP chain, recovering all IP addresses belonging to the IP address field to be deleted on the used IP chain, and then recovering the IP address field to be deleted;
when the preset IP recovery mode is to delay the recovery of the IP address, the DHCP server executes: and setting the IP address field to be deleted to be in a deleting state, and recovering the IP address field to be deleted after all the IP addresses are automatically returned.
3. The address pool management method of claim 2, wherein: and the DHCP server hangs the IP address to be returned on an appointed position of an idle IP chain, or the DHCP server randomly hangs the IP address to be returned on the idle IP chain.
4. The address pool management method of claim 2, wherein: and when the IP address on the idle IP chain is empty, the DHCP server takes out at least one IP address from a certain IP address segment in the address pool and hangs the IP address on the idle IP chain.
5. An address pool management server, characterized by: the address pool management server comprises a memory and a processor, wherein the memory comprises an IP address recovery method program, and the IP address recovery method program realizes the steps of the IP address recovery method as claimed in claim 1 when executed by the processor.
6. An address pool management server, characterized by: the address pool management server comprises a memory and a processor, wherein the memory comprises an address pool management method program, and the address pool management method program realizes the steps of the address pool management method according to any one of claims 2 to 4 when being executed by the processor.
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| CN105704256A (en) * | 2014-11-26 | 2016-06-22 | 中国移动通信集团公司 | Method, device and system for IP address management |
| CN107786680A (en) * | 2016-08-31 | 2018-03-09 | 中国电信股份有限公司 | Method and apparatus for being managed to IP address resources |
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| US7330907B2 (en) * | 2003-10-02 | 2008-02-12 | Internet Associates, Llc | Methods, computer systems, and computer readable media for controlling the status of network address space |
| CN101330530B (en) * | 2008-07-02 | 2012-09-05 | 亿阳信通股份有限公司 | Method and apparatus for managing IP address segment |
| CN103117864B (en) * | 2011-11-16 | 2016-07-06 | 阿里巴巴集团控股有限公司 | The method of a kind of subnet merging and device |
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| CN105704256A (en) * | 2014-11-26 | 2016-06-22 | 中国移动通信集团公司 | Method, device and system for IP address management |
| CN107786680A (en) * | 2016-08-31 | 2018-03-09 | 中国电信股份有限公司 | Method and apparatus for being managed to IP address resources |
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