WO2019057167A1

WO2019057167A1 - Method for obtaining ip address, device, and mobile terminal

Info

Publication number: WO2019057167A1
Application number: PCT/CN2018/107022
Authority: WO
Inventors: 吴兆云; 王慧鑫; 方燕; 袁龙泉; 何子龙; 周维龙
Original assignee: 惠州Tcl移动通信有限公司
Priority date: 2017-09-22
Filing date: 2018-09-21
Publication date: 2019-03-28
Also published as: CN107613042A

Abstract

Disclosed in the present application are a method for obtaining an IP address, a device, and a terminal. In the provided method for obtaining an IP address, an obtained medium access control address of a wireless access point is matched with a preset IP storage list when establishing a connection with the wireless access point, and if the matching succeeds and the lease time of an IP address is within a preset time range, the IP address can be used. Thus, a user does not need to reconnect to the IP address during each connection to the wireless access point, thereby reducing the time for connecting to the wireless access point and improving the user experience.

Description

Method, device and mobile terminal for obtaining IP address

Technical field

The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a mobile terminal for acquiring an IP address.

Background technique

At present, Wireless Fidelity (Wi-Fi) networks have become a common wireless network used in people's daily life and work. More and more end users transmit data through WI-FI.

In the traditional mode, when a user accesses a wireless access point (AP), the terminal needs to obtain an IP address through a Dynamic Host Configuration Protocol (DHCP) to access the external network. It takes a long time to obtain an IP address through DHCP, and each time the user connects to the AP, the process needs to be repeated, which takes a long time and has a poor user experience.

Summary of the invention

The technical problem to be solved by the present application is to provide a method, a device, and a mobile terminal for obtaining an IP address, which can reduce the time for obtaining an IP address and improve the user experience.

In order to solve the above technical problem, the first technical solution adopted by the present application is to provide a device having a storage function, the device storing program data, and the program data can be executed to implement the following operations: establishing with a wireless access point When connecting, reading a preset IP storage list, where the IP storage list includes connection information between the terminal and the wireless access point; and obtaining the medium access control address of the wireless access point and the connection information between the terminal and the wireless access point If the media access control address of the wireless access point exists in the connection information between the terminal and the wireless access point, if the matching is successful, the IP corresponding to the media access control address of the wireless access point is obtained in the IP storage list. Address; determining whether the lease time of the IP address is within the first preset time range; if yes, using the IP address and storing the current connection information, wherein the connection information includes the IP address, the lease time of the IP address, and the dynamic host configuration protocol server the address of.

In order to solve the above technical problem, the second technical solution adopted by the present application is to provide a mobile terminal, the terminal includes a processor and a communication circuit electrically coupled to each other, and the processor is configured to perform the following actions: in the communication circuit and the wireless connection When the connection is established, the obtained medium access control address of the wireless access point is matched with the preset IP storage list; if the matching is successful, the medium access control address of the wireless access point is obtained in the IP storage list. Corresponding IP address; determining whether the lease time of the IP address is within a preset time range; if yes, controlling the communication circuit to use the IP address and storing the current connection information.

To solve the above technical problem, the third technical solution adopted by the present application is: providing a method for obtaining an IP address, the method comprising: acquiring a medium of a wireless access point when establishing a connection with a wireless access point; The access control address is matched with the preset IP storage list; if the matching is successful, the IP address corresponding to the media access control address of the wireless access point is obtained in the IP storage list; determining whether the lease time of the IP address is in the first pre- Set the time range; if yes, use the IP address and store the current connection information.

The beneficial effects of the present application are: different from the prior art, the present application provides a method, an apparatus, and a terminal for obtaining an IP address. By providing a method for obtaining an IP address, when the connection is established with the wireless access point, the obtained media access control address of the wireless access point is matched with a preset IP storage list, and if the matching is successful, and If the lease time of the IP address is within a preset time range, the IP address can be used, so that the user does not need to reconnect the IP address every time the user connects to the wireless access point, thereby saving the time for connecting the wireless access point and improving The user experience.

DRAWINGS

1 is a schematic flowchart of a first embodiment of a method for obtaining an IP address according to the present application;

2 is a schematic flowchart of a specific implementation process of step S101 in the method for obtaining an IP address in the present application;

3 is a schematic flowchart of a second embodiment of a method for obtaining an IP address according to the present application;

4 is a schematic diagram of a specific implementation process of step S301 in the method for obtaining an IP address in the present application;

FIG. 5 is a schematic structural diagram of a mobile terminal according to the present application; FIG.

6 is another schematic structural diagram of a mobile terminal according to the present application;

FIG. 7 is a schematic structural diagram of an apparatus having a storage function according to the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments.

An Access Point (AP) is a wireless network access point, commonly known as a "hot spot." Its function is to connect the wired signal to the wireless network after it is connected to the wired network, and the notebook or other terminal device accesses the wireless Wi-Fi local area network by receiving the signal transmitted by it.

The Dynamic Host Configuration Protocol (DHCP) is a LAN network protocol that works with the UDP protocol and has two main purposes: to automatically assign IP addresses to internal networks or network service providers; to users or internal network administrators. As a means of central management of all computers, it is described in detail in RFC 2131.

The Address Resolution Protocol (ARP) is a TCP/IP protocol that obtains a physical address based on an IP address. When the host sends the information, it broadcasts the ARP request containing the target IP address to all hosts on the network, and receives the return message to determine the physical address of the target. After receiving the return message, the IP address and physical address are stored in the local ARP. The cache keeps a certain amount of time, and the next time the request is made, the ARP cache is directly queried to save resources.

Acknowledgement (ACK) is a transmission type control character that the receiving station sends to the transmitting station in data communication. Indicates that the data sent has been confirmed to be correct.

The media access address (Media Access Control or Medium Access Control, MAC) is used to define the location of the network device. In the OSI model, the Layer 3 network layer is responsible for the IP address, and the Layer 2 data link layer is responsible for the MAC address. Therefore, a host will have a MAC address, and each network location will have an IP address specific to it.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of a first embodiment of a method for obtaining an IP address according to the present application. The execution body in this embodiment may be a terminal (such as a notebook, a computer, a mobile phone, a wearable device, etc.). The terminal can be implemented by hardware or software. In addition, it should be noted that the method of the present embodiment is not limited to the sequence of the flow shown in FIG. 1 if substantially the same result is obtained. As shown, the method includes the following steps:

In S101, when establishing a connection with the wireless access point, the obtained media access control address of the wireless access point is matched with a preset IP storage list.

Optionally, please refer to FIG. 2. FIG. 2 is a schematic flowchart of a specific implementation process of further expanding the step S101 in the first embodiment, and the wireless device obtained in this embodiment is obtained on the basis of the first embodiment of the present application. The matching of the media access control address of the access point with the preset IP storage list includes the following steps:

In S201, the preset IP storage list is read, wherein the IP storage list includes connection information of the terminal and the wireless access point.

Optionally, the connection information includes the IP address, a lease time of the IP address, and an address of the dynamic host configuration protocol server.

In S202, the obtained media access control address of the wireless access point is matched with the connection information of the terminal and the wireless access point.

In S203, if the media access control address of the wireless access point exists in the connection information between the terminal and the wireless access point, the matching is successful.

Specifically, when a successful physical connection is established with the AP, the MAC address of the AP is obtained, and the preset IP storage list is read, where the IP storage list stores the connection information of the AP connected to the AP each time, and the MAC of the AP is The address is used as the query condition to match the preset IP storage list. If the corresponding MAC address is found in the IP storage list, the matching is successful, that is, the terminal has previously connected to the AP; if the IP storage list is not found in the IP storage list The corresponding MAC address indicates that the matching is unsuccessful, that is, the terminal has not connected to the AP before.

Optionally, if the matching is unsuccessful, the terminal is not connected to the AP, and the DHCP Discovery message is sent. After receiving the DHCP Discovery message, the AP forwards the DHCP Discovery to each DHCP server in the network. And receiving, by the DHCP server, the DHCP Discovery message, the IP address assigned to the terminal is carried in the DHCP offer message and sent to the terminal by using the AP, and the terminal selects a DHCP offer message. The IP address in the IP address is used as the selected IP address, and the DHCP request message carrying the selected IP address is sent; after receiving the DHCP request message, the AP forwards the DHCP request message to each DHCP server in the network; After receiving the DHCP request message, the DHCP server of the selected IP address saves the entry of the wireless client, and the selected IP address is carried in the DHCP ACK message and sent to the terminal by using the AP. The IP address in the DHCP ACK packet is used as the finally obtained IP address.

In the embodiment of the present application, when establishing a connection with the wireless access point, matching the obtained media access control address of the wireless access point with a preset IP storage list, and performing corresponding correspondence according to the matching result. Operation can improve the efficiency of connecting APs.

In S102, if the matching is successful, an IP address corresponding to the medium access control address of the wireless access point is obtained in the IP storage list.

In S103, it is determined whether the lease time of the IP address is within a first preset time range.

Optionally, the determining whether the lease time of the IP address is within a first preset time range comprises: calculating a first preset time according to the following formula: T0=T1+T2*0.8; wherein, T0 is the foregoing a predetermined time, T1 is the time when the IP address is acquired for the first time, and T2 is the lease time; if T0 is greater than the current system time, determining that the lease time of the IP address is in the first preset time range If the T0 is less than or equal to the current system time, it is determined that the lease time of the IP address is not within the first preset time range.

For example: T1 is set to August 1st, 2017 at 08:00:00 (year, month, day, hour, minute and second), T2 is set to 240 hours, then T0 is August 1, 2017, 08:00:00 + 192 hours. That is, at 08:00:00 on August 9, 2017, if the current system time is 11:15:20 on August 8, 2017, then T0 is greater than the current system time, and the lease time of the IP address is determined to be in the first If the current system time is 08:15:20 on August 10, 2017, T0 is less than the current system time, and it is determined that the lease time of the IP address is not within the first preset time range.

In the embodiment of the present application, the IP address lease time refers to the expiration date of the IP address configuration information acquired by the client computer at the DHCP server. After the client automatically obtains an IP address, it usually has a certain period of use. After the deadline, you need to re-apply for an IP address. However, frequent IP address changes can cause trouble for management. User search can make the client computer have permanent access to the IP address by setting the IP address lease term. The first preset time is a time value set according to the lease time. If it is within the first preset time range, it indicates that the IP address can continue to be used; if not within the first preset time range, it indicates When the lease expires, you need to re-apply for an IP address.

In S104, if yes, the IP address is used and the current connection information is stored.

It can be seen that, in this embodiment, when the connection is established with the wireless access point, the obtained medium access control address of the wireless access point is matched with the preset IP storage list, and if the matching is successful, If the lease time of the IP address is within the preset time range, the IP address can be used, which enables the user to reconnect the IP address each time the wireless access point is connected, saving the time for connecting the wireless access point and improving the time. user experience.

Referring to FIG. 3, FIG. 3 is a schematic flowchart of a method for obtaining an IP address according to a second embodiment of the present application. This embodiment includes:

In S301, if the lease time of the IP address is not within the first preset time range, sending an address resolution protocol broadcast packet to determine whether the IP address is already occupied, and sending a dynamic host configuration protocol request message frame. Go to the Dynamic Host Configuration Protocol server to request the assignment of the IP address.

Optionally, please refer to FIG. 4. FIG. 4 is a schematic diagram of a specific implementation process of further expanding the step S301 in the second embodiment, which is based on the first embodiment of the present application. Determining whether the IP address is already occupied includes the following steps:

In S401, an encapsulated address resolution protocol broadcast packet is sent; wherein the address resolution protocol broadcast packet includes the IP address and a source medium access control address of the terminal.

Specifically, the ARP broadcast packet is encapsulated, and the obtained IP address is set as the source address and the destination address of the ARP broadcast packet, and the MAC address of the terminal is set as the source MAC address, and the destination MAC address is set to all 00, as the broadcast mode, and then The encapsulated ARP broadcast packet is sent out.

In S402, the address resolution protocol response corresponding to the address resolution protocol broadcast packet received and received is analyzed.

In S403, if the media access control address corresponding to the IP address is different from the source media access control address of the mobile terminal, the IP address is determined to be occupied.

Specifically, if the terminal receives the corresponding ARP response, and the response is analyzed to find that the MAC address corresponding to the IP address queried by the current terminal is not the current terminal, the terminal determines that the IP address conflict occurs, that is, the IP address. Already occupied.

In S404, if the media access control address corresponding to the IP address is the same as the source media access control address of the mobile terminal, the IP address is determined to be unoccupied.

Specifically, if the terminal receives the corresponding ARP response, and the response is analyzed to find that the MAC address corresponding to the IP address queried by the current terminal is owned by the current terminal, it is determined that the terminal does not have an IP address conflict, that is, the IP address. Not occupied.

In S302, it is determined whether the address resolution protocol broadcast packet is received in the second preset time range, and the address resolution protocol response that the IP address is not occupied is returned, and the dynamic information returned by the dynamic host configuration protocol server is received. The host configures the protocol reply message.

Specifically, when the IP address is not occupied by the ARP resolution, and the DHCP server returns a DHCP ACK message within the first preset time range, the current IP address is used. Otherwise, the process of obtaining an IP address in the case where the matching is unsuccessful in the first embodiment is not described here.

In S303, if yes, the IP address is obtained from the dynamic host configuration protocol response message, and the current connection information is stored.

Specifically, the current connection information is stored when the terminal connects to the wireless access point, and the connection information is provided for the next connection to the wireless access point.

Optionally, if the address resolution protocol broadcast packet is not received within the second preset time range, the address resolution protocol response that the IP address is not occupied is returned, or the dynamic information returned by the dynamic host configuration protocol server is received. The host configures the protocol response message, and then obtains the IP address according to the method of sending the DHCP Discovery packet. The details are as follows, and are not mentioned here.

It can be seen that, in this embodiment, when the lease time of the IP address is not within the first preset time range, the ARP broadcast packet is sent to determine that the IP address is not occupied, and the dynamic host configuration protocol request message frame is sent to the dynamic host. Configuring a protocol server to request allocation of the IP address, and receiving an ARP broadcast packet in the second preset time range to return an ARP response that is not occupied by the IP address, and receiving a DHCP ACK message returned by the DHCP server, The dynamic host configuration protocol response message acquires the IP address and stores current connection information. Therefore, each time the user uses the terminal to connect to the wireless access point, the IP address does not need to be reconnected, which saves the time for connecting the wireless access point and improves the user experience.

Referring to FIG. 5 , FIG. 5 is a schematic structural diagram of a mobile terminal. The mobile terminal 50 includes a processor 501 and a communication circuit 502 electrically coupled to each other.

The processor 501 can be configured to: when the communication circuit 502 establishes a connection with the wireless access point, match the obtained media access control address of the wireless access point with a preset IP storage list; if the matching is successful, Obtaining an IP address corresponding to the media access control address of the wireless access point in the IP storage list; determining whether the lease time of the IP address is within a preset time range; if yes, controlling the communication circuit 502 uses the IP address and stores the current connection information.

The specific working process of the processor 501 and the communication circuit 502 is as described above with reference to the method for obtaining an IP address, and details are not described herein again.

As can be seen from the above, the embodiment provides a mobile terminal, where the mobile terminal includes a processor and a communication circuit electrically coupled to each other. The processor matches the obtained media access control address of the wireless access point with a preset IP storage list when the communication circuit establishes a connection with the wireless access point, and if the matching is successful, and the IP address is If the lease time is within the preset time range, the IP address can be used, which enables the user to reconnect the IP address each time the wireless access point is connected, saving the time for connecting the wireless access point and improving the user experience.

Please refer to FIG. 6. FIG. 6 is another schematic structural diagram of a mobile terminal according to the present application. A mobile terminal 60 further includes: a transceiver 601 coupled to the processor 501.

The transceiver 601 can be configured to: if the lease time of the IP address is not within the first preset time range, send an address resolution protocol broadcast packet to determine whether the IP address is already occupied, and send a dynamic host configuration protocol request message frame. Go to the Dynamic Host Configuration Protocol server to request the assignment of the IP address. The transceiver 601 is further configured to send the encapsulated address resolution protocol broadcast packet, where the address resolution protocol broadcast packet includes the IP address and a source medium access control address of the terminal.

The processor 501 is specifically configured to determine whether the address resolution protocol broadcast packet is received in the second preset time range, and the address resolution protocol response that is not occupied by the IP address is returned, and the dynamic host configuration protocol server is received. The returned dynamic host configuration protocol response message; if yes, the IP address is obtained from the dynamic host configuration protocol response message, and the current connection information is stored.

The processor 501 is further configured to: parse the address resolution protocol response corresponding to the address resolution protocol broadcast packet that is received, and display the media access control address corresponding to the IP address in the parsing result If the source medium access control address of the terminal is different, it is determined that the IP address is already occupied; or

If the media access control address corresponding to the IP address is the same as the source media access control address of the terminal, it is determined that the IP address is not occupied.

The specific working process of the processor 501 and the communication circuit 601 is as described above with reference to the method for obtaining an IP address, and details are not described herein again.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of an apparatus having a storage function. The apparatus 70 having a storage function stores program data 701 thereon, and the program data 701 can be executed to implement the foregoing acquisition. The method described in the method of IP address.

The present invention provides a method, an apparatus, and a terminal for acquiring an IP address, which are different from the prior art. By providing a method for obtaining an IP address, when the connection is established with the wireless access point, the obtained media access control address of the wireless access point is matched with a preset IP storage list, and if the matching is successful, and If the lease time of the IP address is within a preset time range, the IP address can be used, so that the user does not need to reconnect the IP address every time the user connects to the wireless access point, thereby saving the time for connecting the wireless access point and improving The user experience.

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims

A device having a storage function, wherein the device stores program data, the program data being executable to perform the following operations:

Reading a preset IP storage list when establishing a connection with the wireless access point, where the IP storage list includes connection information between the terminal and the wireless access point;

And matching the obtained media access control address of the wireless access point with the connection information of the terminal and the wireless access point;

If the media access control address of the wireless access point exists in the connection information between the terminal and the wireless access point, if the matching is successful, acquiring the wireless access point in the IP storage list The IP address corresponding to the media access control address;

Determining whether the lease time of the IP address is within a first preset time range;

If yes, the IP address is used, and the current connection information is stored, wherein the connection information includes the IP address, a lease time of the IP address, and an address of the dynamic host configuration protocol server.
The apparatus of claim 1 wherein said program data is further executable to:

If the lease time of the IP address is not within the first preset time range, send an address resolution protocol broadcast packet to determine whether the IP address is already occupied, and send a dynamic host configuration protocol request message frame to the dynamic host configuration. The protocol server allocates the IP address by request;

Determining whether the address resolution protocol broadcast packet is received in the second preset time range, and the address resolution protocol response that the IP address is not occupied is returned, and the dynamic host configuration protocol response returned by the dynamic host configuration protocol server is received. Message

If yes, the IP address is obtained from the dynamic host configuration protocol response message, and the current connection information is stored.
The apparatus according to claim 2, wherein said program address data is executed by said transmission address resolution protocol to broadcast a packet to determine whether said IP address is already occupied, including:

Transmitting an encapsulated address resolution protocol broadcast packet; wherein the address resolution protocol broadcast packet includes the IP address and a source medium access control address of the terminal;

Parsing an address resolution protocol response corresponding to the address resolution protocol broadcast packet received and parsing;

If the media access control address corresponding to the IP address is different from the source media access control address of the terminal, the IP address is determined to be occupied; or

If the media access control address corresponding to the IP address is the same as the source media access control address of the terminal, it is determined that the IP address is not occupied.
The apparatus according to claim 1, wherein the operation of determining, by the program data, whether a lease time of the IP address is within a first preset time range comprises:

The first preset time is calculated according to the following formula: T0=T1+T2*0.8; wherein T0 is the first preset time, T1 is the time for acquiring the IP address for the first time, and T2 is the lease time;

If the T0 is greater than the current system time, determining that the lease time of the IP address is within the first preset time range;

If T0 is less than or equal to the current system time, it is determined that the lease time of the IP address is not within the first preset time range.
A mobile terminal, wherein the terminal includes a processor and a communication circuit electrically coupled to each other, and the processor is configured to perform the following actions:

When the communication circuit establishes a connection with the wireless access point, matching the obtained media access control address of the wireless access point with a preset IP storage list; if the matching is successful, the IP storage list is Obtaining an IP address corresponding to the media access control address of the wireless access point; determining whether the lease time of the IP address is within a preset time range; if yes, controlling the communication circuit to use the IP address, and Store current connection information.
The terminal of claim 5, wherein the terminal further comprises:

a transceiver coupled to the processor;

The transceiver is configured to: if the lease time of the IP address is not within the first preset time range, send an address resolution protocol broadcast packet to determine whether the IP address is already occupied, and send a dynamic host configuration protocol request message frame to The dynamic host configuration protocol server requests the allocation of the IP address;

The processor is configured to determine whether the address resolution protocol broadcast packet is received in the second preset time range, and the address resolution protocol response that is not occupied by the IP address is returned, and the dynamic host configuration protocol server returns The dynamic host configuration protocol response message; if yes, the IP address is obtained from the dynamic host configuration protocol response message, and the current connection information is stored.
The terminal according to claim 6, wherein

The transceiver is specifically configured to send an encapsulated address resolution protocol broadcast packet, where the address resolution protocol broadcast packet includes the IP address and a source medium access control address of the terminal;

The processor is specifically configured to parse the received address resolution protocol response corresponding to the address resolution protocol broadcast packet, and display the media access control address corresponding to the IP address and the terminal in the parsing result. If the source medium access control address is different, it is determined that the IP address is already occupied; or

If the media access control address corresponding to the IP address is the same as the source media access control address of the terminal, it is determined that the IP address is not occupied.
The terminal according to claim 5, wherein the action performed by the processor to determine whether the lease time of the IP address is within a first preset time range comprises:

The first preset time is calculated according to the following formula: T0=T1+T2*0.8; wherein T0 is the first preset time, T1 is the time for acquiring the IP address for the first time, and T2 is the lease time;

If the T0 is greater than the current system time, determining that the lease time of the IP address is within the first preset time range;

If T0 is less than or equal to the current system time, it is determined that the lease time of the IP address is not within the first preset time range.
The terminal according to claim 5, wherein the performing, by the processor, the matching of the obtained medium access control address of the wireless access point with a preset IP storage list, includes:

Reading the preset IP storage list, where the IP storage list includes connection information between the terminal and the wireless access point;

And matching the obtained media access control address of the wireless access point with the connection information of the terminal and the wireless access point;

If the media access control address of the wireless access point exists in the connection information between the terminal and the wireless access point, the matching is successful.
The terminal of claim 5, wherein the connection information comprises the IP address, a lease time of the IP address, and an address of the dynamic host configuration protocol server.
A method for obtaining an IP address, including:

When establishing a connection with the wireless access point, matching the obtained media access control address of the wireless access point with a preset IP storage list;

If the matching is successful, obtaining an IP address corresponding to the media access control address of the wireless access point in the IP storage list;

Determining whether the lease time of the IP address is within a first preset time range;

If so, the IP address is used and the current connection information is stored.
The method of claim 11 wherein the method further comprises:

If the lease time of the IP address is not within the first preset time range, send an address resolution protocol broadcast packet to determine whether the IP address is already occupied, and send a dynamic host configuration protocol request message frame to the dynamic host configuration. The protocol server allocates the IP address by request;

Determining whether the address resolution protocol broadcast packet is received in the second preset time range, and the address resolution protocol response that the IP address is not occupied is returned, and the dynamic host configuration protocol response returned by the dynamic host configuration protocol server is received. Message

If yes, the IP address is obtained from the dynamic host configuration protocol response message, and the current connection information is stored.
The method of claim 12, wherein

The sending an address resolution protocol broadcast packet to determine whether the IP address is already occupied includes:

Transmitting an encapsulated address resolution protocol broadcast packet; wherein the address resolution protocol broadcast packet includes the IP address and a source medium access control address of the terminal;

Parsing an address resolution protocol response corresponding to the address resolution protocol broadcast packet received and parsing;

If the media access control address corresponding to the IP address is different from the source media access control address of the terminal, the IP address is determined to be occupied; or

If the media access control address corresponding to the IP address is the same as the source media access control address of the terminal, it is determined that the IP address is not occupied.
The method of claim 11 wherein

The determining whether the lease time of the IP address is within a first preset time range includes:

The first preset time is calculated according to the following formula: T0=T1+T2*0.8; wherein T0 is the first preset time, T1 is the time for acquiring the IP address for the first time, and T2 is the lease time;

If the T0 is greater than the current system time, determining that the lease time of the IP address is within the first preset time range;

If T0 is less than or equal to the current system time, it is determined that the lease time of the IP address is not within the first preset time range.
The method of claim 11 wherein

The matching the obtained media access control address of the wireless access point with the preset IP storage list includes:

Reading the preset IP storage list, where the IP storage list includes connection information between the terminal and the wireless access point;

And matching the obtained media access control address of the wireless access point with the connection information of the terminal and the wireless access point;

If the media access control address of the wireless access point exists in the connection information between the terminal and the wireless access point, the matching is successful.
The method of claim 11 wherein

The connection information includes the IP address, a lease time of the IP address, and an address of the dynamic host configuration protocol server.