CN117376314A - Public network address penetration method of terminal equipment, terminal equipment, and storage media - Google Patents

Abstract

The application discloses a public network address penetration method of terminal equipment, the terminal equipment, a storage medium and a wireless router, wherein the method comprises the following steps: receiving a first application requesting allocation of I P addresses from a first device of a local area network; in response to the first application, a public network I P address obtained from a wide area network is assigned to the first device, and the first device is connected to the wide area network using the public network I P address. In this way, the public network address can pass through the terminal equipment and be transmitted to the equipment of the local area network.

Description

Public network address penetration method of terminal equipment, terminal equipment, and storage media

Technical field

The present application relates to the field of mobile communication technology, and in particular to a public network address penetration method for a terminal device, a terminal device, a storage medium and a wireless router.

Background technique

In traditional technology, the public IP address obtained by the wireless router from the WAN (Wide Area Network) is configured on the WAN side network port of the wireless router, and the IP address obtained by the users of the LAN (Local Area Network) is The private IP address assigned by the wireless router. The wireless router uses the Network Address Translation (NAT) function to map the private IP address to the public IP address. The source IP address of the data packet sent by the LAN user ( That is, the private network IP address) is converted into a public network IP address and forwarded to the WAN after NAT conversion, thereby achieving communication between the LAN and the WAN.

With the development of 5G networks, many special applications require the use of public IP addresses for end-to-end communication. In the traditional NAT mode, wireless routers cannot work properly.

Contents of the invention

Based on this, embodiments of the present application provide a public network address penetration method for a terminal device, a terminal device, a storage medium, and a wireless router, which can transparently transmit the public network address through the terminal device to the device on the local area network.

In a first aspect, this application provides a public network address penetration method for a terminal device. The method includes:

Receive a first request from a first device in the local area network to allocate an IP address;

In response to the first application, the public IP address obtained from the wide area network is assigned to the first device, so that the first device uses the public IP address to connect to the wide area network.

In a second aspect, this application provides a terminal device. The terminal device includes a communication circuit, a memory, and a processor. The communication circuit is used for communication; the memory is used to store a computer program; and the processor is used to execute the The computer program implements the public network address penetration method of the terminal device as described above when the computer program is executed.

In a third aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the computer program causes the processor to implement the public functions of the terminal device as described above. Network address penetration method.

In a fourth aspect, this application provides a wireless router, which includes:

A network bridge has a private network gateway and a public network gateway, and the network bridge receives a first application requesting allocation of an IP address from a first device in the local area network through the private network gateway;

Dynamic Host Configuration Protocol (DHCP) service module, in response to the first application, allocates the public network IP address obtained from the wide area network to the first device, so that the first device uses the public network The IP address is connected to the wide area network through the public network gateway of the bridge.

Embodiments of the present application provide a public network address penetration method for a terminal device, a terminal device, a storage medium and a wireless router. After receiving the first application from the first device in the local area network to request the allocation of an IP address, it will obtain the IP address from the wide area network. The public IP address of the first device is assigned to the first device, so that the first device uses the public IP address to connect to the WAN; that is, the WAN can be assigned to the public IP address of the terminal device and passed through the terminal device to one of the LAN devices. Device use allows this device to directly use the public IP address to perform business functions of special applications. In this way, terminal equipment can be adapted to new business needs and usage scenarios, improving terminal competitiveness.

Description of the drawings

Figure 1 is a block diagram of a wireless router obtaining a public IP address from a wide area network and allocating a private IP address in the prior art;

Figure 2 is a schematic flowchart of a public network address penetration method for a terminal device according to an embodiment of the present application;

Figure 3 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

Figure 4 is a schematic structural diagram of a wireless router according to an embodiment of the present application;

Figure 5 is another schematic flowchart of a public network address penetration method for a terminal device according to an embodiment of the present application;

Figure 6 is a block diagram of the allocation of public network IP addresses, private network IP addresses, public network gateway IP addresses and private network gateway IP addresses in the public network address penetration method of terminal equipment according to the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of this application.

The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all contents and operations/steps, nor are they necessarily performed in the order described. For example, some operations/steps can also be decomposed, combined or partially merged, so the actual order of execution may change according to actual conditions.

In the following description, the use of suffixes such as "module", "component" or "unit" used to represent elements is only to facilitate the description of the present application and has no specific meaning in itself. Therefore, "module", "component" or "unit" may be used interchangeably.

Before introducing the embodiments of the present application in detail, the technology related to the embodiments of the present application will be introduced first.

Referring to Figure 1, in traditional technology, a wireless router (for example, Customer Premise Equipment (CPE) in the figure) obtains a public IP address (for example, as shown in the figure) from a wide area network (WAN). 1.1.1.1), configured on the WAN side network port of the wireless router, the IP addresses obtained by users of the wireless router's LAN (Local Area Network) (i.e. LAN devices) are all private IP addresses assigned by the wireless router (for example, The private network IP addresses of the two users of the LAN shown in the figure are 192.168.0.100 and 192.168.0.101 respectively. The private network gateway address on the bridge is 192.168.0.1. One user is connected to the private network of the bridge through the RJ45 interface. Gateway connection, a user is connected to the private network gateway of the bridge through WIFI), the wireless router uses the Network Address Translation (NAT, Network Address Translation) function to map the private network IP address to the public network IP address, and the LAN user sends After the source IP address of the data packet is converted by NAT, the private IP address is converted into a public IP address and forwarded to the WAN, thereby achieving communication between LAN and WAN.

With the explosive growth of mobile Internet, Internet of Things and industry applications, in the future mobile communications will face a thousand-fold increase in data traffic and the demand for hundreds of billions of devices to be connected. As the development direction of a new generation of mobile communication technology, 5G will further meet the massive demand for future Internet of Things applications on the basis of improving the business experience of mobile Internet users, and will be deeply integrated with industry, medical, transportation and other industries to realize the true "Internet of Everything" ".

The new development trends of 5G networks, especially 5G new services, new architectures, and new technologies, along with IP-based voice transmission (VoIP, Voice over Internet Protocol), interactive Internet TV (IPTV, Internet Protocol TV or Interactive Personal TV), Applications of new and old services such as IP Phone and TR069 protocol (TR069, Technical Report069) require the use of public IP addresses for end-to-end communication. For wireless routers in traditional NAT mode, the IP address obtained by LAN users is the private IP address assigned by the wireless router. The private IP address cannot be transmitted and used on the WAN. Instead, the data sent by LAN users is converted by NAT. The source IP address of the packet is replaced from the private IP address to the public IP address. In the traditional NAT mode, wireless routers cannot meet the needs of these services. Specific scenarios for these business needs include: adapting to older tablet devices; adapting to downlink routers to realize the mobility of these routers; adapting outdoor unit (ODU, Out Door Unit) equipment to indoor units (IDU, In Door Unit) ) equipment, etc.

VoIP is a voice call technology that uses Internet Protocol (IP) to achieve voice calls and multimedia conferences, that is, communication through the Internet. IPTV is a new technology that uses broadband cable TV networks to integrate Internet, multimedia, communications and other technologies to provide home users with a variety of interactive services including digital TV. TR069 is a technical specification. This specification is an application layer management protocol, named "CPE WAN Management Protocol". TR069 defines a new set of network management architecture, including management models, interactive interfaces and basic management parameters, which can effectively Implement management of home network equipment. Both IDU and ODU are components of microwave communication stations; IDU is responsible for completing business access, multiplexing and modulation and demodulation, and converting business signals into intermediate frequency analog signals indoors; ODU is responsible for completing frequency conversion and amplification of signals, and then through the antenna , convert radio frequency signals into electromagnetic waves, radiate into the air, or receive electromagnetic waves, convert into radio frequency signals, and send them to the IDU.

After receiving the first application from the first device in the local area network to allocate an IP address, the terminal device in the embodiment of the present application allocates the public IP address obtained from the wide area network to the first device, so that the first device uses the public IP address. The address is connected to the WAN; that is, the public IP address of the WAN can be assigned to the terminal device and passed through the terminal device to one of the LAN devices for use, so that the device can directly use the public IP address to perform business functions of special applications. In this way, the terminal equipment can be adapted to the needs and usage scenarios of the above services and improve the competitiveness of the terminal.

The methods of the embodiments of the present application are described in detail below.

Referring to Figure 2, Figure 2 is a schematic flow chart of an embodiment of a public network address penetration method for a terminal device of the present application. The terminal device in the embodiment of this application may refer to a device that can be connected between a local area network and a wide area network and that can be assigned a public IP address by the wide area network. The terminal device includes but is not limited to: CPE, data card, USB fidelity (UFI, USB -Fidelity), outdoor unit (ODU, Out Door Unit) and other terminal equipment.

The method includes: step S101 and step S102. The method in the embodiment of this application is applied to terminal equipment.

Step S101: Receive a first application requesting allocation of an IP address from a first device in the local area network.

Step S102: In response to the first application, allocate the public IP address obtained from the wide area network to the first device, so that the first device uses the public IP address to connect to the wide area network.

In this embodiment of the present application, the terminal device is connected between the local area network and the wide area network, and the wide area network can assign a public IP address to the terminal device. A local area network includes more than one device. The first device may be the first device to request allocation of an IP address when the current public network IP address is not allocated to the device.

After receiving the first application from the first device in the local area network to allocate an IP address, the terminal device allocates the public IP address obtained from the wide area network to the first device, so that the first device uses the public IP address to connect to the wide area network; That is, the public IP address of the WAN assigned to the terminal device can be transparently transmitted through the terminal device to one of the devices for use, so that the first device can directly use the public IP address to perform business functions of special applications. In this way, the terminal equipment can be adapted to the needs and usage scenarios of the above services and improve the competitiveness of the terminal.

In an embodiment, after step S102, in response to the first application and allocating the public IP address obtained from the wide area network to the first device, the method further includes: step S103 and step S104.

Step S103: Receive a second application requesting allocation of an IP address from the second device of the local area network.

Step S104: When the first device is online, respond to the second application and allocate the first private IP address to the second device so that the second device uses the first private IP The address is connected to the local area network.

In the embodiment of the present application, after the terminal device allocates a public IP address to the first device and the first device is online, it also allocates the first private IP address to other second devices in the local area network except the first device that obtained the public IP address. network IP address, so that the second device can use the first private network IP address to connect to the local area network.

In an embodiment, the method further includes: step S105, step S106 and step S107.

Step S105: Receive a data packet from the second device. The source IP address of the data packet of the second device is the first private network IP address. The destination IP address of the data packet of the second device is the WAN IP address.

Step S106: Replace the source IP address of the data packet of the second device from the first private network IP address to the public network IP address.

Step S107: Send the data packet with the source IP address replaced to the destination IP address through the wide area network.

In the embodiment of the present application, the terminal device also provides the function of connecting to the wide area network for multiple devices in the local area network. In order to provide this function, the terminal device allocates the first private network IP address to the non-public network user (ie, the second device) and receives all the IP addresses. For the data packet of the second device, after the terminal device undergoes source network address translation (SNAT, Source Network Address Translation), the source IP address of the data packet of the second device is replaced from the first private network IP address to the Using the public IP address, the data packet after replacing the source IP address is sent to the destination IP address through the WAN. In this way, users with private IP addresses in the LAN can also use the network resources of the WAN.

In an embodiment, the method further includes: step S108.

Step S108: Assign the second private network IP address to the terminal device.

In the embodiment of this application, the wide area network allocates a public IP address to the terminal device. After the terminal device allocates the public IP address to the first device, the terminal device is configured with a private IP address instead of a public IP address. Therefore, the second private network IP address is assigned to the terminal device.

In an embodiment, the method further includes: step S109.

Step S109: Replace the source IP address of the terminal device from the second private IP address to the public IP address, so that the terminal device uses the public IP address to connect to the wide area network.

After the terminal device application undergoes SNAT conversion, the source IP address of the terminal device is replaced from the second private network IP address to the public network IP address, so that the terminal device uses the public network IP address and the public network IP address. The above-mentioned WAN connection enables the terminal device to also use the network resources of the WAN.

For example, terminal device applications such as FOTA (Firmware Over-The-Air), Simple Network Time Protocol (SNTP), TR069 protocol, etc. can also work normally. FOTA is a means to update the user's firmware system through the network. SNTP is mainly used to synchronize computer clocks on the Internet.

In an embodiment, the method further includes: step S110.

Step S110: When the first device is monitored to be offline, reclaim the public IP address assigned to the first device.

In the embodiment of this application, after the first device is assigned a public IP address, it will monitor whether the first device is online. If it is monitored that the first device is not online, that is, it is offline, it means that the first device no longer needs a public IP address. , therefore the public IP address assigned to the first device is withdrawn to avoid wasting public IP address resources.

In an embodiment, the method further includes: step S111 and step S112.

Step S111: Receive a third application requesting allocation of an IP address from a third device of the local area network.

Step S112: When the first device is offline, respond to the third application and allocate the recovered public IP address to the third device, so that the third device uses the public IP address and The WAN connection.

In the embodiment of this application, the first device is offline and after reclaiming the public IP address assigned to the first device, it can also accept a third application from the next third device to request the assignment of an IP address, and the reclaimed public IP address The address is assigned to the third device, so that the third device uses the public network IP address to connect to the wide area network. In this way, the device can make full use of public network IP address resources.

In one embodiment, if the terminal device has not obtained the public IP address assigned by the wide area network, before receiving the first application requesting the allocation of an IP address from the first device in the local area network in step S101, step S113 may also be included.

Step S113: After connecting to the wide area network, obtain the public IP address from the wide area network. That is, the terminal device can first establish a connection with the WAN and then obtain the public IP address from the WAN.

In an embodiment, the method further includes: step S114.

Step S114: After disconnecting from the wide area network, delete the public IP address, and notify the first device that allocated the public IP address to request allocation of a private IP address again.

In this embodiment of the present application, if the terminal device is disconnected from the wide area network, the public IP address is deleted, and the first device that allocates the public IP address is notified to re-request allocation of a private IP address.

Referring to Figure 3, Figure 3 is a schematic structural diagram of an embodiment of the terminal device of the present application. It should be noted that the terminal device of the embodiment of the present application can implement the above-mentioned public network address penetration method of the terminal device. For detailed description of the relevant content, please Please refer to the method section above and will not go into details here. Terminal devices in the embodiments of this application include but are not limited to: CPE, data card, USB-Fidelity (UFI, USB-Fidelity), outdoor unit (ODU, Out Door Unit) and other terminal devices.

The terminal device 100 includes a communication circuit 3, a memory 1 and a processor 2. The communication circuit 3 is used for communication; the memory 1 is used to store a computer program; and the processor 2 is used to execute the computer program and execute the computer program. When the computer program is executed, the public network address penetration method of the terminal device as described above is implemented.

Among them, the processor 2 can be a micro control unit, a central processing unit or a digital signal processor, etc. The memory 1 can be a Flash chip, a read-only memory, a magnetic disk, an optical disk, a U disk or a mobile hard disk, etc.

The wireless router is one type of terminal equipment in the embodiment of the present application. The application of the method in the embodiment of the present application on the wireless router will be described in detail below.

Referring to Figure 4, Figure 4 is a schematic structural diagram of an embodiment of a wireless router. The wireless router includes a network bridge 10 and a DHCP service module 20.

The network bridge 10 has a private network gateway and a public network gateway. The network bridge 10 receives a first application requesting the allocation of an IP address from the first device of the local area network through the private network gateway; the DHCP service module 20 responds to the first application, Allocate the public network IP address obtained from the wide area network to the first device, so that the first device uses the public network IP address to connect to the wide area network through the public network gateway of the network bridge.

In an embodiment, the wireless router further includes: a wireless dialing module 30, a routing module 40, and a user access list module 50.

The wireless dialing module 30 is used to obtain the public IP address from the wide area network after connecting to the wide area network, broadcast a successful dialing event, and send the public IP address to other modules; disconnect from the wide area network. Afterwards, a disconnect message is broadcast.

Among them, the wireless dialing module 30 is mainly responsible for establishing or disconnecting the Packet Data Protocol (PDP, PacketData Protocol) connection with the wide area network. After establishing the PDP connection, the wireless dialing module 30 obtains the public network IP address from the wide area network, and then broadcasts the dialing success event. And send the information carrying the public IP address to other modules. After receiving the successful dialing event, the other DHCP service modules 20 and routing module 40 perform corresponding processing.

After receiving the dial-up success event, the routing module 40 uses the subnet mask and the public network IP address to calculate the public network gateway address and transfer the public network IP address to the public network when the public network IP address penetration function is turned on. Add the gateway address to the network bridge 10; replace the IP address of the WAN network card of the wireless router with the second private network IP address; configure the downlink public network routing rules so that the destination IP address from the WAN is the The data packet of the public network IP address can be routed to the interface of the public network gateway of the network bridge 10; a source address conversion function is added to obtain the second device and the second private network IP address of the first private network IP address. A wireless router capable of connecting to the WAN.

In the embodiment of this application, the source address conversion function is added, which can replace the source IP address of the data packet of the second device from the first private network IP address to the public network IP address, and send the data packet with the replaced source IP address. To the destination IP address, which is a WAN IP address, so that the second device can connect to the WAN, the source IP address of the wireless router can be replaced from the second private IP address to a public IP address, and the public IP address Address and WAN connection.

The DHCP service module 20 is also used to allocate the first private IP address to the second device of the local area network; before receiving the dial-up success event, configure a second address pool with at least one private IP address; after receiving the dial-up event, After the success event, when the public network IP address penetration function is turned on, a first address pool with the public network IP address is added and configured, and then restarted, so that the DHCP service module 20 prioritizes allocating the public network IP. address to the first device that accesses first; after receiving the disconnection message, delete the first address pool and notify the first device assigned the public IP address to re-request allocation of a private IP address. address.

The user access list module 50 is configured to notify the DHCP service module 20 to release the public IP address and clear the allocation of the public IP address when monitoring that the first device allocated the public IP address is offline. The recording time is so that the third device that requests the allocation of an IP address next can obtain the public IP address again.

The embodiment of this application allocates the public IP address of the WAN to the wireless router and transmits it transparently to the first device among the LAN devices through the wireless router, which can effectively solve the problem of LAN devices needing to use public IP addresses in special application scenarios, and expand Wireless router usage scenarios to improve the competitiveness of wireless routers.

The method process and steps of the embodiment of the present application will be described in detail below with reference to Figures 4, 5 and 6. The detailed steps of the communication process between the various modules of the wireless router are as follows:

Step C100: The wireless dial-up module 30 establishes a PDP connection with the WAN, obtains the public IP address from the WAN (1.1.1.1 shown in Figure 6 is the public IP address), and then broadcasts the dial-up success event, which will carry the public IP address. The address information is sent to other routing modules 40 and DHCP service module 20 .

Step C101: The routing module 40 receives the dial-up success event. If the public network IP penetration function is turned on, it uses the subnet mask and the public network IP address to calculate the public network gateway address (1.1.1.2 shown in Figure 6 is Public network gateway address), add the public network gateway to the bridge through the command "ip addr add wan_gateway/32scope link dev bridge0". At this time, there are two addresses of the public network gateway and the private network gateway on the bridge 10 (192.168.0.1 shown in Figure 6 is the private network gateway address).

Step C102: The routing module 40 replaces the wireless router wide area network WAN network card IP address with the second private network IP address through the command "ifconfig wan_interface 169.254.3.2netmask255.255.255.255up" (169.254.3.2 shown in Figure 6 is the second private network IP address). The wireless router no longer uses the public IP address, but uses the second private IP address.

Step C103: The routing module 40 configures the downlink public network routing rules so that the data packets from the wide area network with the destination address being the public network IP address are routed to the public network gateway interface of the bridge 10. Use the command "ip route add wan_ipaddr/32dev bridge0". And add the SNAT function so that the second device that obtains the first private network IP address can also access the network resources of the WAN. Use the command "iptables-t nat-IPOSTROUTING-o wan_interface-jSNAT--to wan_ipaddr". After configuring the routing rules, the routing module 40 notifies the DHCP service module 20 to update the address pool information.

Step C104: After receiving the notification, the DHCP service module 20 adds a first address pool of public network IP addresses. In this first address pool, there are only public network IP addresses, that is, the public network IP obtained by the wireless dial-up module 30 from the wide area network. address, and then restart the DHCP service module 20 so that the DHCP service module 20 preferentially allocates a public network IP address to the first connected first device.

Step C105: After the public network IP address is assigned to the first device, the user access list module 50 always monitors whether the first device is online. If the first device is offline, notifies the DHCP service module 20 to immediately release the public network address and clear the allocation. The recording time of the public IP address. After clearing the allocated recording time, the next third device can obtain the public IP address again.

Step C106: When the wireless dialing module 30 broadcasts the PDP connection disconnection message, the routing module 40 deletes the public network gateway address on the bridge 10, retains the private network gateway address, and deletes the public network routing rule information; the DHCP service module 20 changes the first address to The pool is deleted, and the first device that obtains the public network address is notified to request allocation of a private network IP address again. At this time, all LAN devices can only obtain private network IP addresses.

The embodiments of this application can improve the application scenarios and competitiveness of wireless routers, do not involve hardware, and have universal portability.

The present application also provides a computer-readable storage medium, which is characterized in that the computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the processor can implement any of the above terminals. The device’s public network address penetration method.

The computer-readable storage medium may be an internal storage unit of the above-mentioned terminal device or wireless router, such as a hard disk or memory. The computer-readable storage medium can also be an external storage device of the above-mentioned terminal device or wireless router, such as a plug-in hard disk, a smart memory card, a secure digital card, a flash memory card, etc.

Those of ordinary skill in the art can understand that all or some steps, systems, and functional modules/units in the devices disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof.

In hardware implementations, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may consist of several physical components. Components execute cooperatively. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit . Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is known to those of ordinary skill in the art, the term computer storage media includes volatile and nonvolatile media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. removable, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, tapes, disk storage or other magnetic storage devices, or may Any other medium used to store the desired information and that can be accessed by a computer. Additionally, it is known to those of ordinary skill in the art that communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but the scope of rights of the present application is not thereby limited. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and essence of this application shall be within the scope of rights of this application.

Claims (10)

1. A public network address penetration method for terminal equipment, characterized in that the method includes: Receive a first request from a first device in the local area network to allocate an IP address; In response to the first application, the public IP address obtained from the wide area network is assigned to the first device, so that the first device uses the public IP address to connect to the wide area network. 2. The method of claim 1, wherein after allocating the public IP address obtained from the wide area network to the first device in response to the first application, the method further includes: Receive a second application from a second device in the local area network requesting allocation of an IP address; When the first device is online, in response to the second application, allocate the first private IP address to the second device, so that the second device uses the first private IP address and the The above LAN connection; and / or, The method also includes: Assign a second private network IP address to the terminal device. 3. The method according to claim 2, characterized in that, the method further comprises: Receive the data packet from the second device, the source IP address of the data packet from the second device is the first private network IP address, and the destination IP address of the data packet from the second device is the wide area network IP address. ; Replace the source IP address of the data packet of the second device from the first private IP address to the public IP address; Send the data packet after replacing the source IP address to the destination IP address through the wide area network; and / or, The method also includes: Replace the source IP address of the terminal device from the second private network IP address to the public network IP address, so that the terminal device uses the public network IP address to connect to the wide area network. 4. The method according to claim 1, characterized in that, the method further comprises: When it is monitored that the first device is offline, the public IP address assigned to the first device is withdrawn. 5. The method according to claim 4, characterized in that, the method further comprises: Receive a third application from a third device in the local area network requesting allocation of an IP address; When the first device is offline, in response to the third application, allocate the recovered public IP address to the third device, so that the third device uses the public IP address to communicate with the wide area network connect. 6. The method according to claim 1, characterized in that before receiving the first application requesting allocation of an IP address from the first device of the local area network, it further includes: After connecting to the wide area network, obtain the public IP address from the wide area network; and / or, The method also includes: After disconnecting from the wide area network, the public IP address is deleted, and the first device that allocates the public IP address is notified to request allocation of a private IP address again. 7. A terminal device, characterized in that the terminal device includes a communication circuit, a memory and a processor, the communication circuit is used for communication; the memory is used to store a computer program; the processor is used to execute the computer program and when the computer program is executed, the public network address penetration method of the terminal device according to any one of claims 1 to 6 is implemented. 8. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the computer program causes the processor to implement any one of claims 1-6 The public network address penetration method of the terminal device. 9. A wireless router, characterized in that the wireless router includes: A network bridge has a private network gateway and a public network gateway, and the network bridge receives a first application requesting allocation of an IP address from a first device in the local area network through the private network gateway; The dynamic host configuration protocol service module responds to the first application and allocates the public IP address obtained from the wide area network to the first device, so that the first device uses the public IP address to pass through the network bridge. The public network gateway is connected to the wide area network. 10. The wireless router according to claim 9, characterized in that the wireless router further includes: A wireless dialing module, configured to obtain the public IP address from the wide area network after connecting to the wide area network, broadcast a successful dialing event, and send the public IP address to other modules; disconnect from the wide area network Afterwards, broadcast the disconnection message; The routing module is used to calculate the public network gateway address using the subnet mask and the public network IP address after receiving the dial-up success event and when the public network IP address penetration function is turned on. Add the gateway address to the network bridge; replace the IP address of the WAN network card of the wireless router with the second private network IP address; configure the downlink public network routing rules so that the destination IP address from the WAN is the Data packets with public network IP addresses can be routed to the interface of the public network gateway of the bridge; a source address conversion function is added to obtain the second device with the first private network IP address and all the second private network IP addresses. The wireless router can be connected to the wide area network; The user access list module is configured to notify the DHCP service module to release the public IP address and clear the device allocated the public IP address when it is monitored that the first device allocated the public IP address is offline. Record the time so that the next third device that requests the allocation of an IP address can obtain the public IP address again; The dynamic host configuration protocol service module is also used to allocate the first private network IP address to the second device of the local area network; before receiving the dial-up success event, configure a second address pool with at least one private network IP address; in After receiving the dial-up success event, when the public network IP address penetration function is turned on, add and configure the first address pool with the public network IP address, and then restart, so that the dynamic host configuration protocol service module is allocated first The public network IP address is given to the first device that accesses first; after receiving the disconnection message, the first address pool is deleted, and the first device assigned the public network IP address is notified to re- Request allocation of private IP address.