CN104363137A - In-local-area-network IP address distribution information monitoring method and device - Google Patents

Abstract

The present invention proposes a method for monitoring IP address allocation information in a local area network. The method can detect the allocation status of available IP addresses and update the available IP address record files in real time, thereby preventing network terminals from using allocated IP addresses. At the same time, it also proposes an IP address allocation information monitoring device, an IP network terminal or a DHCP server including the above device, and an IP network system including the above IP network terminal or DHCP server.

Description

A method and device for monitoring IP address allocation information in a local area network

technical field

The invention relates to the field of computer technology, in particular to a method and device for monitoring IP address allocation information in a local area network.

Background technique

At present, most enterprises, schools, and laboratories use the internal LAN for work. When a new device is connected to the LAN, it needs to be assigned an IP to access the LAN. In most cases, the IP in the LAN is dynamically assigned by setting up a DHCP server. When a new device is connected to the LAN, it will obtain an unallocated IP from the DHCP server.

In some special cases, some devices may require a fixed IP for access through the fixed IP, which requires: 1. Assign an unused IP to it. 2. Try to avoid that this IP is occupied by other devices when the device is turned off.

Based on the above-mentioned problems in the prior art, it is necessary to establish a mechanism to detect the allocation status of IP addresses in the local area network and avoid using IP addresses that have already been allocated.

Contents of the invention

In order to achieve the above purpose, a method for monitoring IP address allocation information in a local area network is provided, including:

S1: read the available IP address recorded in the available IP address record file;

S2: Detecting the allocation state of the available IP address;

S3: After the detection is completed, the available IP address record file is updated, and the process ends.

In particular:

There are also steps before said step S1:

S0: judging whether the available IP address record file exists, if so, execute step S1,

Otherwise, perform the following steps:

S01: Create an available IP address record file;

S02: Prompt the user to input the IP address segment to be detected;

S03: Detect the allocation status of the IP addresses in the IP address network segment, and assign the available IP addresses to

The address is saved to the available IP address record file created in step S01, and the process ends.

In particular:

The update of the available IP address record file described in step S3 is specifically:

Delete the allocated IP address from the available IP address record file.

An IP address allocation information monitoring device, applied to an IP address-based local area network, comprising:

The available IP address record file reading module is used to read the available IP address in the available IP address record file;

A first detection module, configured to detect the distribution state of the available IP address;

An update module, configured to update the available IP address record file after the detection is completed.

In particular, also has:

A judging module, configured to judge whether the available IP address record file exists;

The available IP address record file creation module is used to create the available IP address record file when the judging module determines that the available IP address record file does not exist;

The IP address network segment prompting module is used to prompt the user to input the IP address network segment to be detected after creating the available IP address record file, and receive the IP address network segment input by the user;

The second detection module is used to detect the allocation state of the IP address in the IP address network segment, and save the available IP address in the available IP address record file created by the available IP address record file creation module .

In particular:

The update of the available IP address record file is specifically:

Delete the allocated IP address from the available IP address record file.

An IP network terminal includes the above-mentioned IP address allocation information monitoring device.

A DHCP server includes the above-mentioned IP address allocation information monitoring device.

An IP address-based network system includes the above-mentioned IP network terminal, or the above-mentioned DHCP server.

The beneficial effect of the invention is that it can detect the allocation status of the IP address in the local area network, and avoid using the IP address that has been allocated.

Description of drawings

Accompanying drawing 1 is a flowchart of a method for monitoring IP address allocation information in a local area network proposed by the present invention.

Detailed ways

The technical solution proposed by the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to accompanying drawing 1, after the method starts to execute, first check whether there is an available IP address record file, which records the available IP address information recorded when the previous method was executed.

If no available IP address record file is detected, it means that this method is executed for the first time, and then an available IP address record file will be created, and the user will be prompted to input the IP address network segment to be detected, and then all IP addresses of this network segment will be Scanning is performed and available unassigned IP addresses are saved to this log file for use the next time the method is executed.

If it is detected that there is the available IP address record file, the available IP address record file is read, and the IP address allocation state detection is carried out according to the available IP address information recorded therein. After the detection is completed, the available IP address record file is updated to It is used for the next method execution. In particular, this step can be implemented in the following specific manner: if it is detected that the available IP address record file exists, then read the available IP address record file, save the data therein to a temporarily created record file, according to the The recorded available IP address information is used to detect the IP address allocation status, and the allocated IP address is deleted from it. After the detection is completed, the data in the temporarily created record file is used to replace the detected available IP address record file, so as to realize the update .

The present invention also proposes a monitoring device for IP address allocation information, which is applied to a local area network based on IP addresses, including:

The available IP address record file reading module is used to read the available IP address in the available IP address record file;

A first detection module, configured to detect the distribution state of the available IP address;

An update module, configured to update the available IP address record file after the detection is completed.

In particular, also has:

A judging module, configured to judge whether the available IP address record file exists;

The available IP address record file creation module is used to create the available IP address record file when the judging module determines that the available IP address record file does not exist;

The IP address network segment prompting module is used to prompt the user to input the IP address network segment to be detected after creating the available IP address record file, and receive the IP address network segment input by the user;

The second detection module is used to detect the allocation state of the IP address in the IP address network segment, and save the available IP address in the available IP address record file created by the available IP address record file creation module .

The above-mentioned device can be realized by using an FPGA device, an application-specific integrated circuit, and the like.

The present invention also proposes the following equipment applicable to the network based on the IP address:

An IP network terminal includes the above-mentioned IP address allocation information monitoring device.

A DHCP server includes the above-mentioned IP address allocation information monitoring device.

An IP address-based network system includes the above-mentioned IP network terminal, or the above-mentioned DHCP server.

Of course, the present invention can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present invention without departing from the spirit and essence of the present invention, but these corresponding Changes and deformations should all belong to the protection scope of the claims of the present invention.

Claims (9)

1. A method for monitoring IP address allocation information in a local area network, characterized in that, comprising: S1: read the available IP address recorded in the available IP address record file; S2: Detecting the allocation state of the available IP address; S3: After the detection is completed, the available IP address record file is updated, and the process ends. 2. The method according to claim 1, characterized in that: There are also steps before said step S1: S0: Determine whether the available IP address record file exists, if it exists, execute step S1, otherwise execute the following steps: S01: Create an available IP address record file; S02: Prompt the user to input the IP address segment to be detected; S03: Detect the allocation status of the IP addresses in the IP address network segment, save the available IP addresses in the available IP address record file created in step S01, and the process ends. 3. The method according to claim 1 or 2, characterized in that: The update of the available IP address record file described in step S3 is specifically: Delete the allocated IP address from the available IP address record file. 4. An IP address allocation information monitoring device, applied in a local area network based on an IP address, is characterized in that, comprising: The available IP address record file reading module is used to read the available IP address in the available IP address record file; A first detection module, configured to detect the distribution state of the available IP address; An update module, configured to update the available IP address record file after the detection is completed. 5. The device of claim 4, further comprising: A judging module, configured to judge whether the available IP address record file exists; The available IP address record file creation module is used to create the available IP address record file when the judging module determines that the available IP address record file does not exist; The IP address network segment prompting module is used to prompt the user to input the IP address network segment to be detected after creating the available IP address record file, and receive the IP address network segment input by the user; The second detection module is used to detect the allocation state of the IP address in the IP address network segment, and save the available IP address in the available IP address record file created by the available IP address record file creation module . 6. The device according to claim 4 or 5, characterized in that: The update of the available IP address record file is specifically: Delete the allocated IP address from the available IP address record file. 7. An IP network terminal, characterized by comprising the device according to any one of claims 4 to 6. 8. A DHCP server, characterized in that it comprises the device according to any one of claims 4 to 6. 9. An IP address-based network system, characterized in that it comprises the IP network terminal as claimed in claim 7, or the DHCP server as claimed in claim 8.