CN114448750B - Communication method, device, equipment and medium of pure network bridge mode - Google Patents
Communication method, device, equipment and medium of pure network bridge mode Download PDFInfo
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- CN114448750B CN114448750B CN202210058064.1A CN202210058064A CN114448750B CN 114448750 B CN114448750 B CN 114448750B CN 202210058064 A CN202210058064 A CN 202210058064A CN 114448750 B CN114448750 B CN 114448750B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
- H04L12/462—LAN interconnection over a bridge based backbone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
- H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- Computer Networks & Wireless Communication (AREA)
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- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
本发明公开的一种纯网桥模式的通信方法、装置、设备及介质，通过获取网桥的后端设备发送的报文中的网络信息；构建虚拟网络设备，并将所述网络信息配置为所述虚拟网络设备的网络地址；通过所述虚拟网络设备的网络地址在所述网桥中收发通信数据，提供通信服务。该方法通用性强，能够为纯网桥模式的网关设备提供应用服务。
The present invention discloses a communication method, device, equipment and medium in a pure bridge mode, which obtains network information in a message sent by a back-end device of a bridge; constructs a virtual network device, and configures the network information as a network address of the virtual network device; and sends and receives communication data in the bridge through the network address of the virtual network device to provide communication services. The method has strong versatility and can provide application services for gateway devices in a pure bridge mode.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a pure bridge mode communications method, apparatus, device, and medium.
Background
The bridge mode of the communication system is realized by a network bridge, the bridged ports are added into the network bridge, and the network bridge is responsible for forwarding data among different ports to realize two-layer transparent transmission. When the gateway device operates in the bridge mode, the gateway device itself also has a need to use three-layer IP services, such as cloud services, synchronized network time, and upgrading software through the cloud, etc. The three-layer IP service of the gateway equipment in the bridge mode is to additionally establish an IP dialing through the router itself, so as to realize the dialing communication of the back-end equipment.
However, in the communication system in the prior art, many cable modems and single-port optical modems operate in a pure bridge mode, network dialing is actually performed by devices accessed from the rear end, and the gateway device itself does not have a method for performing IP layer dialing in the pure bridge mode, so that external communication services cannot be provided.
Disclosure of Invention
In order to solve the above problems, the present invention provides a communication method, apparatus, device and medium for a pure bridge mode, which provides communication services for gateway devices in the pure bridge mode.
The embodiment of the invention provides a communication method in a pure network bridge mode, which comprises the following steps:
acquiring network information in a message sent by a back-end device of a network bridge;
constructing virtual network equipment and configuring the network information into a network address of the virtual network equipment;
and receiving and transmitting communication data in the network bridge through the network address of the virtual network equipment to provide communication service.
Preferably, the acquiring network information in a message sent by a back-end device of a network bridge specifically includes:
Acquiring a message sent by the back-end equipment;
And analyzing the data packet in the message by using a socket tool or a netfilter frame to acquire the network information of the back-end equipment.
Preferably, the network information includes IP information, gateway information, or domain name information.
As a preferred manner, the method for receiving and transmitting communication data in the network bridge through the network address of the virtual network device, and providing communication service specifically includes:
receiving a communication data packet sent by upper-layer equipment of the network bridge through the virtual network equipment;
And calling a bridging interface of the network bridge through the virtual network equipment, and sending the communication data packet to a server corresponding to a receiving address in the communication data packet.
Preferably, the receiving and transmitting communication data in the network bridge through the network address of the virtual network device provides communication service, which specifically includes:
receiving a communication data packet sent by a server of the network bridge through the virtual network equipment;
judging whether the communication data packet is a reply to the data packet sent by the virtual network equipment or not through the pre-marked connection information of the data packet sent by the virtual network equipment;
When the connection information in the communication data packet is matched with the pre-marked connection information, judging that the communication data packet is a reply to the data packet sent by the virtual network equipment, and sending the communication data packet to an application program corresponding to the virtual network equipment through the virtual network equipment;
And when the connection information in the communication data packet is not matched with the pre-marked connection information, judging that the communication data packet is not a reply to the virtual network device, and forwarding the communication data packet to the back-end device of the network bridge through the normal forwarding flow of the network bridge.
Yet another embodiment of the present invention provides a pure bridge mode communication device, the device comprising:
The network information acquisition module is used for acquiring network information in a message sent by the back-end equipment of the network bridge;
A virtual network device construction module, configured to construct a virtual network device and configure the network information as a network address of the virtual network device;
And the communication service module is used for receiving and transmitting communication data in the network bridge through the network address of the virtual network equipment and providing communication service.
Preferably, the network information acquisition module is specifically configured to:
Acquiring a message sent by the back-end equipment;
And analyzing the data packet in the message by using a socket tool or a netfilter frame to acquire the network information of the back-end equipment.
As a preferred scheme, the network information includes IP information, gateway information, or domain name information.
As a preferred solution, the communication service module is specifically configured to:
receiving a communication data packet sent by upper-layer equipment of the network bridge through the virtual network equipment;
And calling a bridging interface of the network bridge through the virtual network equipment, and sending the communication data packet to a server corresponding to a receiving address in the communication data packet.
As a preferred solution, the communication service module is specifically configured to:
receiving a communication data packet sent by a server of the network bridge through the virtual network equipment;
judging whether the communication data packet is a reply to the data packet sent by the virtual network equipment or not through the pre-marked connection information of the data packet sent by the virtual network equipment;
When the connection information in the communication data packet is matched with the pre-marked connection information, judging that the communication data packet is a reply to the data packet sent by the virtual network equipment, and sending the communication data packet to an application program corresponding to the virtual network equipment through the virtual network equipment;
And when the connection information in the communication data packet is not matched with the pre-marked connection information, judging that the communication data packet is not a reply to the virtual network device, and forwarding the communication data packet to the back-end device of the network bridge through the normal forwarding flow of the network bridge.
The embodiment of the invention also provides a terminal device, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to realize the communication method of the pure bridge mode in any one of the above embodiments.
The embodiment of the invention also provides a computer readable storage medium, which comprises a stored computer program, wherein when the computer program runs, the device where the computer readable storage medium is controlled to execute the communication method of the pure bridge mode according to any one of the above embodiments.
The invention provides a communication method, a device, equipment and a medium of a pure network bridge mode, which are used for acquiring network information in a message sent by a back-end device of a network bridge; constructing virtual network equipment and configuring the network information into a network address of the virtual network equipment; and receiving and transmitting communication data in the network bridge through the network address of the virtual network equipment to provide communication service. The method has strong universality and can provide application service for gateway equipment in a pure network bridge mode.
Drawings
Fig. 1 is a flow chart of a communication method in a pure bridge mode according to an embodiment of the present invention;
fig. 2 is a network topology diagram in a pure bridge mode according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication device in pure bridge mode according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a flow chart of a communication method in a pure bridge mode according to an embodiment of the present invention is shown, where the method includes S1 to S3:
S1, acquiring network information in a message sent by a back-end device of a network bridge;
S2, constructing virtual network equipment and configuring the network information into a network address of the virtual network equipment;
And S3, receiving and transmitting communication data in the network bridge through the network address of the virtual network equipment, and providing communication service.
When the embodiment is implemented, referring to fig. 2, a network topology diagram in a pure bridge mode is provided in the embodiment of the present invention; when the Linux system is in a pure bridge mode, the bridge of the Linux system has no IP address and cannot provide IP service, and at the moment, the Linux system forwards a message sent by a back-end device connected through an interface eth0 at a bridge br 0; the back-end equipment comprises a PC, a set-top box or a router and the like.
The Linux system extracts network information of the back-end equipment in the forwarded message, wherein the network information is specifically an address and a subnet mask allocated by a network protocol of a local area network, and the network protocol of the local area network comprises a dynamic host configuration protocol or a point-to-point protocol;
Constructing a network virtual device according to the acquired network information, and configuring the network information of the back-end device in the network virtual device as the network address of the network virtual device;
the application layer can identify a virtual network device configured with a network address through which communication data is received and transmitted in the network bridge, and the virtual network device is used to provide three layers of IP services, including cloud services, time passing and firmware upgrades, to the upper application layer.
The method has the advantages that the network address is configured for establishing the virtual network equipment by acquiring the network information of the back-end equipment, the problem that the equipment in the pure network bridge mode cannot provide IP service is solved by the virtual network equipment, other adaptation is not needed, and the universality is strong.
In still another embodiment of the present invention, the acquiring network information in a packet sent by a backend device of a bridge specifically includes:
Acquiring a message sent by the back-end equipment;
And analyzing the data packet in the message by using a socket tool or a netfilter frame to acquire the network information of the back-end equipment.
When the embodiment is implemented, the specific process of acquiring the network information in the message sent by the back-end device includes:
The Linux system receives a data packet of a message sent by the back-end equipment, wherein the message is a message sent by the back-end equipment to other equipment through the Linux system;
The Linux system analyzes the obtained data packet according to a socket tool or a netfilter frame and extracts network information contained in the data packet;
and analyzing and obtaining network information through a socket tool or a netfilter framework, configuring the obtained network information to the established virtual network equipment, and completing application service through the virtual network equipment.
In yet another embodiment provided by the present invention, the network information includes IP information, gateway information, or domain name information.
When the embodiment is implemented, the extracted network information includes IP information, gateway information, or domain name information of the back-end device;
Configuring a network address for the virtual network equipment by acquiring IP information, gateway information or domain name information, and completing application service through the virtual network equipment; what the application requiring the IP service recognizes is the network virtual device that can provide the IP service, and the data packet is handed to the virtual network device, so that the Linux system completes the relevant application service through the data packet.
In yet another embodiment of the present invention, the step S3 specifically includes:
receiving a communication data packet sent by upper-layer equipment of the network bridge through the virtual network equipment;
And calling a bridging interface of the network bridge through the virtual network equipment, and sending the communication data packet to a server corresponding to a receiving address in the communication data packet.
In a specific implementation of this embodiment, when the virtual network device provides a communication service, the method includes receiving, by the virtual network device, data of an upper layer device, specifically:
The Linux system receives a communication data packet sent by upper-layer equipment of a network bridge br0 through virtual network equipment;
inquiring a server or equipment corresponding to a receiving address in the communication data packet, and calling a bridging interface eth1 through the virtual network equipment to send the received communication data packet to the server;
in this process, the virtual network device is used as a network bridge for forwarding the data packet of the network device or the server connected with the Linux system.
In still another embodiment of the present invention, the receiving and transmitting communication data in the bridge through the network address of the virtual network device, and providing a communication service specifically includes:
receiving a communication data packet sent by a server of the network bridge through the virtual network equipment;
judging whether the communication data packet is a reply to the data packet sent by the virtual network equipment or not through the pre-marked connection information of the data packet sent by the virtual network equipment;
When the connection information in the communication data packet is matched with the pre-marked connection information, judging that the communication data packet is a reply to the data packet sent by the virtual network equipment, and sending the communication data packet to an application program corresponding to the virtual network equipment through the virtual network equipment;
And when the connection information in the communication data packet is not matched with the pre-marked connection information, judging that the communication data packet is not a reply to the virtual network device, and forwarding the communication data packet to the back-end device of the network bridge through the normal forwarding flow of the network bridge.
In the implementation of this embodiment, the step S3 specifically includes:
receiving a communication data packet sent by a server of the network bridge through the virtual network equipment;
Judging whether the communication data packet is a reply to the virtual network device, specifically, when the virtual network device sends the data packet, marking the connection information of the data packet, specifically, five-tuple information, through a netfilter frame, and storing the marked connection information;
And determining whether the connection information of the communication data packet received by the virtual network device is matched with the connection information of the transmitted data packet or not by judging whether the connection information of the communication data packet received by the virtual network device is a reply to the data packet sent by the virtual network device or not.
When the connection information of the communication data packet is matched with the connection information of the communication data packet sent by the virtual network equipment, the communication data packet is judged to be a reply to the data packet sent by the virtual network equipment, and the communication data packet is sent to an application program corresponding to the virtual network equipment through the virtual network equipment, so that corresponding application service is completed.
When the connection information in the communication data packet is not matched with the pre-marked connection information, judging that the communication data packet is not a reply to the virtual network device, and forwarding the communication data packet to the back-end device of the network bridge through a normal network bridge forwarding path by the Linux device.
It should be noted that, the communication method in pure bridge mode provided by the present invention supports access modes such as cable modem, optical modem, LTE bridge, etc.
The data message sending operation of the virtual network device directly invokes the sending operation of the bridging interface; if the reply is the reply to the message sent by the virtual network device, the reply is directly captured from the network bridge and is sent to the network device for receiving and then is sent to an upper layer. If the data packet is not a reply message to the data sent by the virtual device, a normal bridge forwarding path is taken. The normal forwarding flow of the network bridge is not interfered, and the corresponding application service can be completed through the virtual network equipment.
Referring to fig. 3, a schematic structural diagram of a communication device in a pure bridge mode according to an embodiment of the present invention is further provided, where the device includes:
The network information acquisition module is used for acquiring network information in a message sent by the back-end equipment of the network bridge;
A virtual network device construction module, configured to construct a virtual network device and configure the network information as a network address of the virtual network device;
And the communication service module is used for receiving and transmitting communication data in the network bridge through the network address of the virtual network equipment and providing communication service.
In yet another embodiment of the present invention, the network information obtaining module is specifically configured to:
Acquiring a message sent by the back-end equipment;
And analyzing the data packet in the message by using a socket tool or a netfilter frame to acquire the network information of the back-end equipment.
In yet another embodiment provided by the present invention, the network information includes IP information, gateway information, or domain name information.
In yet another embodiment of the present invention, the communication service module is specifically configured to:
receiving a communication data packet sent by upper-layer equipment of the network bridge through the virtual network equipment;
And calling a bridging interface of the network bridge through the virtual network equipment, and sending the communication data packet to a server corresponding to a receiving address in the communication data packet.
In yet another embodiment of the present invention, the communication service module is specifically configured to:
receiving a communication data packet sent by a server of the network bridge through the virtual network equipment;
judging whether the communication data packet is a reply to the data packet sent by the virtual network equipment or not through the pre-marked connection information of the data packet sent by the virtual network equipment;
When the connection information in the communication data packet is matched with the pre-marked connection information, judging that the communication data packet is a reply to the data packet sent by the virtual network equipment, and sending the communication data packet to an application program corresponding to the virtual network equipment through the virtual network equipment;
And when the connection information in the communication data packet is not matched with the pre-marked connection information, judging that the communication data packet is not a reply to the virtual network device, and forwarding the communication data packet to the back-end device of the network bridge through the normal forwarding flow of the network bridge.
It should be noted that, the communication device in pure bridge mode provided in the embodiment of the present invention is configured to execute all the flow steps of the communication method in pure bridge mode X in the above embodiment, and the working principles and beneficial effects of the two correspond to each other one by one, so that the description is omitted.
Referring to fig. 4, a schematic structural diagram of a terminal device according to an embodiment of the present invention is provided. The terminal device of this embodiment includes: a processor, a memory and a computer program 1 and a computer program 2 stored in the memory and executable on the processor, for example a communication program in a pure bridge mode. The processor, when executing the computer program, implements the steps of the embodiments of the communication method of a pure bridge mode described above, such as steps S1-S3 shown in fig. 1. Or the processor, when executing the computer program, performs the functions of the modules in the device embodiments described above, e.g. a communication device in pure bridge mode.
The computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to accomplish the present invention, for example. The one or more modules may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program in the terminal device. For example, the computer program may be divided into an information acquisition module, a network status determination module and a network status adjustment module, and specific functions of each module are not described herein.
The terminal equipment can be computing equipment such as a desktop computer, a notebook computer, a palm computer, a cloud server and the like. The terminal device may include, but is not limited to, a processor, a memory. It will be appreciated by those skilled in the art that the schematic diagram is merely an example of the terminal device and is not limiting of the terminal device, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., the terminal device may also include input and output devices, network access devices, buses, etc.
The Processor may be a central processing unit (Central Processing Unit, CPU), other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, which is a control center of the terminal device, and which connects various parts of the entire terminal device using various interfaces and lines.
The memory may be used to store the computer program and/or module, and the processor may implement various functions of the terminal device by running or executing the computer program and/or module stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart memory card (SMART MEDIA CARD, SMC), secure Digital (SD) card, flash memory card (FLASH CARD), at least one disk storage device, flash memory device, or other volatile solid-state storage device.
Wherein the terminal device integrated modules may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as a stand alone product. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
It should be noted that modifications and adaptations to the invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
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| CN112953833A (en) * | 2021-03-25 | 2021-06-11 | 全讯汇聚网络科技（北京）有限公司 | Method, system and gateway equipment for realizing three-layer route forwarding based on network bridge |
| CN113612689A (en) * | 2021-08-11 | 2021-11-05 | 优刻得科技股份有限公司 | Message forwarding method, system, device and medium |
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