CN115643268A - Method, device and system for realizing local area network master-slave computer communication protocol - Google Patents

Abstract

The invention belongs to the technical field of communication, and relates to a method, a device and a system for realizing a local area network master-slave computer communication protocol based on a UDP protocol, wherein the method comprises the following steps: after the host accesses the local area network, first broadcast information is sent to ports of each slave device; all slave devices supporting the protocol of the first broadcast information send second broadcast information to the port of the host after receiving the first broadcast information; the host stores the second broadcast information; when the host sends a data instruction to the slave equipment, adding second broadcast information in front of the message; and when the slave equipment in the local area network receives the message, comparing the second broadcast information with the parameter information of the slave equipment and replying to the host. The invention realizes the point-to-point communication between the host and the slave in the local area network; the host and the slave devices can communicate across network segments, the host does not need to know the IP addresses of the slave devices in advance, and the communication of the master device and the slave device cannot be influenced by the IP address conflict of the plurality of slave devices.

Description

LAN master-slave communication protocol implementation method, device and system

technical field

The invention belongs to the technical field of communication, and specifically relates to a method, a device and a system for realizing a master-slave communication protocol of a local area network.

Background technique

As IoT devices are more and more widely used in various industries, and there are more and more IoT devices, IoT devices usually do not integrate human-machine interfaces and there is no convenient way to view the network information of IoT devices, or due to The factory settings are the same, and IP conflicts are prone to occur, resulting in viewing under the same LAN. If more IoT devices are mounted, if you want to configure or view a certain device, you need to establish a connection between the host and the device using the TCP protocol. , it is necessary to know the IP address of the device in advance, which is very difficult in the complex environment of the device site; if UDP broadcast is used, although the data of the host can reach the device, it cannot communicate with the device with an unknown IP address in the single LAN Interact with each other and configure parameters for the device.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a method, device and system for realizing the master-slave communication protocol of the local area network.

In the first aspect, the present disclosure provides a method for implementing a master-slave communication protocol in a local area network, including:

The host finds slave devices, including:

After the host is connected to the local area network, it sends the first broadcast information to the port of each slave device;

All the slave devices in the local area network that support the protocol of the first broadcast information send the second broadcast information to the port of the host after receiving the first broadcast information;

The host saves the second broadcast information;

The host communicates point-to-point with the slave device, including:

When the host sends a data command to the slave device, adding the second broadcast information in front of the message;

When the slave device in the local area network receives the message, it compares the second broadcast information with its own parameter information, and if the second broadcast information is the same as its own parameter information, then The slave device replies to the host according to the data instruction, otherwise, if the second broadcast information is different from its own parameter information, the slave device does not reply to the host.

In the second aspect, the present disclosure provides a device for implementing a master-slave communication protocol in a local area network, including:

Host; said host includes:

a first sending unit, after the host is connected to the local area network, it sends the first broadcast information to the ports of each slave device;

A first storage unit, configured to store first broadcast information; the first broadcast information includes parameter information of the slave device;

When the host sends a data command to the slave device, it adds second broadcast information in front of the message; the second broadcast information is the slave device that supports the protocol of the first broadcast information parameter information;

a first receiving unit, configured to receive data replied by the slave device;

A slave device; the slave device includes:

a second receiving unit, configured to receive the first broadcast information;

a second storage unit, configured to store second broadcast information;

A comparison unit, when the slave device in the local area network receives the message, compares the second broadcast information with its own parameter information, if the second broadcast information and its own parameter information If they are the same, the slave device replies to the host according to the data command, otherwise, if the second broadcast information is different from its own parameter information, the slave device does not reply to the host;

The second sending unit is configured to send the second broadcast information to the port of the host after receiving the first broadcast information, and after comparing the second broadcast information with its own parameter information, according to the The data command is returned to the host.

In a third aspect, the present disclosure provides a system for implementing a master-slave communication protocol in a local area network, including at least one processor and a memory:

The memory is used to store one or more program instructions;

The processor is used to run one or more program instructions to execute the method for implementing the LAN master-slave communication protocol.

The beneficial effects of the present invention are: the present invention realizes the point-to-point communication of the network equipment in the local area network; the host and the slave equipment can communicate across network segments, the host does not need to know the IP address of the slave in advance, and the conflict of multiple slave IP addresses will not affect Master-slave communication.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, the protocols of the first broadcast information and the second broadcast information are user datagram protocols.

Further, the first broadcast information includes parameter information of the slave device.

Further, the second broadcast information is parameter information of the slave device that supports the protocol of the first broadcast information.

Further, the parameter information of the slave device includes MAC address information and device model information.

Description of drawings

FIG. 1 is a schematic diagram of a master device searching for a slave device provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a device for implementing a master-slave communication protocol in a local area network provided by Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of a system for implementing a master-slave communication protocol in a LAN provided by Embodiment 3 of the present invention.

Icon: 1-master; 2-slave; 101-first sending unit; 102-first storage unit; 103-first receiving unit; 201-second receiving unit; 202-second storage unit; 203-comparison unit ; 204-second sending unit; 301-processor; 302-memory.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Example 1

As an embodiment, as shown in accompanying drawing 1, in order to solve the above-mentioned technical problems, this embodiment provides a method for implementing a master-slave communication protocol in a local area network, including:

The host finds slave devices, including:

After the host is connected to the local area network, it sends the first broadcast information to the ports of each slave device;

All slave devices in the local area network that support the protocol of the first broadcast information send the second broadcast information to the port of the host after receiving the first broadcast information;

The host saves the second broadcast information;

Point-to-point communication between the host and the slave device, including:

When the master sends a data command to the slave device, it adds the second broadcast information in front of the message;

When the slave device in the local area network receives the message, it compares the second broadcast information with its own parameter information. If the second broadcast information is the same as its own parameter information, the slave device replies to the master according to the data command, otherwise , if the second broadcast information is different from its own parameter information, the slave device does not reply to the master.

Optionally, both protocols of the first broadcast information and the second broadcast information are user datagram protocols.

The UDP (User Datagram Protocol, User Datagram Protocol) protocol, like the TCP (Transmission Control Protocol, Transmission Control Protocol) protocol, is a network protocol based on the IP protocol, and the protocol is called the User Datagram Protocol. UDP provides a way for applications to send encapsulated IP packets without establishing a connection.

Optionally, the first broadcast information includes parameter information of the slave device.

Optionally, the second broadcast information is parameter information of slave devices that support the protocol of the first broadcast information.

Optionally, the parameter information of the slave device includes MAC address information and device model information.

The invention realizes the point-to-point communication of the network equipment in the local area network; the host and the slave equipment can communicate across network segments, the host does not need to know the IP address of the slave in advance, and the conflict of IP addresses of multiple slaves will not affect the communication between the master and the slave.

Example 2

Based on the same principle as the method shown in Embodiment 1 of the present invention, as shown in Figure 2, the embodiment of the present invention also provides a local area network master-slave communication protocol implementation device, including:

Hosts; Hosts include:

The first sending unit 101, after the master accesses the local area network, sends the first broadcast information to the port of each slave device;

The first storage unit 102 is configured to store first broadcast information; the first broadcast information includes parameter information of the slave device;

When the host sends a data instruction to the slave device, it adds the second broadcast information in front of the message; the second broadcast information is the parameter information of the slave device that supports the protocol of the first broadcast information;

The first receiving unit 103 is configured to receive data replied by the slave device;

Slave devices; slave devices include:

The second receiving unit 201 is configured to receive the first broadcast information;

The second storage unit 202 is configured to store the second broadcast information;

The comparison unit 203, when the slave device in the local area network receives the message, compares the second broadcast information with its own parameter information, if the second broadcast information is the same as its own parameter information, then the slave device according to the data instruction Reply to the host, otherwise, if the second broadcast information is not the same as its own parameter information, the slave device will not reply to the host;

The second sending unit 204 is configured to send the second broadcast information to the port of the host after receiving the first broadcast information, and reply to the host according to the data instruction after comparing the second broadcast information with its own parameter information.

Optionally, both protocols of the first broadcast information and the second broadcast information are user datagram protocols.

Optionally, the first broadcast information includes parameter information of the slave device.

Optionally, the second broadcast information is parameter information of slave devices that support the protocol of the first broadcast information.

Optionally, the parameter information of the slave device includes MAC address information and device model information.

The working principle of the LAN master-slave communication protocol implementation device includes:

The host finds the device:

After the host is connected to the LAN, the host sends broadcast information. After receiving this broadcast information, all devices in the LAN that support this protocol will broadcast information about the device to the host port, including MAC, device model, etc., and the host will Each of these information is stored separately for subsequent point-to-point communication between the master and slave devices.

Point-to-point communication between the host and the slave:

The host and the slave are based on UDP broadcast communication. The data sent by the master and the slave respectively are received by the network devices in the LAN. When the host sends data to the slave, the slave device parameters such as MAC address are added in front of the message. , so that when the slave in the local area network receives the message, it will first compare the MAC address in the message with its own MAC address. If they are different, they will not respond. If they are the same, they will reply to the master according to the instructions in the protocol. It realizes the point-to-point communication between the host and the network device in the local area network through UDP broadcasting.

The invention realizes the point-to-point communication of the network equipment in the local area network; the host and the slave equipment can communicate across network segments, the host does not need to know the IP address of the slave in advance, and the conflict of IP addresses of multiple slaves will not affect the communication between the master and the slave.

Example 3

Based on the same principle as the method shown in Embodiment 1 of the present invention, as shown in Figure 3, the embodiment of the present invention also provides a LAN master-slave communication protocol implementation system, including at least one processor 301 and memory 302:

memory 301, for storing one or more program instructions;

The processor 302 is used to run one or more program instructions to execute the implementation method of the local area network master-slave communication protocol.

The invention realizes the point-to-point communication of the network equipment in the local area network; the host and the slave equipment can communicate across network segments, the host does not need to know the IP address of the slave in advance, and the conflict of IP addresses of multiple slaves will not affect the communication between the master and the slave.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. The method for realizing the communication protocol of the local area network master and slave machines is characterized by comprising the following steps:

the master lookup slave device comprises:

after the host accesses the local area network, first broadcast information is sent to ports of each slave device;

after receiving the first broadcast information, all the slave devices in the local area network which support the protocol of the first broadcast information send second broadcast information to the port of the host;

the host saves the second broadcast information;

the point-to-point communication between the master and the slave device comprises:

when the host sends a data instruction to the slave equipment, the second broadcast information is added in front of the message;

and when the slave equipment in the local area network receives the message, comparing the second broadcast information with the parameter information of the slave equipment, if the second broadcast information is the same as the parameter information of the slave equipment, replying the master machine by the slave equipment according to the data instruction, otherwise, if the second broadcast information is not the same as the parameter information of the slave equipment, not replying the master machine by the slave equipment.

2. The method as claimed in claim 1, wherein the first broadcast message and the second broadcast message are both user datagram protocols.

3. The method as claimed in claim 1, wherein the first broadcast message includes parameter information of the slave device.

4. The method as claimed in claim 1, wherein the second broadcast message is a parameter message of the slave device supporting the protocol of the first broadcast message.

5. The method as claimed in any one of claims 1 to 3, wherein the parameter information of the slave device includes MAC address information and device model information.

6. LAN owner is from machine communication protocol implementation device, its characterized in that includes:

a host; the host includes:

the first sending unit is used for sending first broadcast information to the ports of each slave device after the host accesses the local area network;

a first storage unit for storing first broadcast information; the first broadcast information includes parameter information of the slave device;

when the host sends a data instruction to the slave equipment, adding second broadcast information in front of the message; the second broadcast information is parameter information of the slave device supporting a protocol of the first broadcast information;

the first receiving unit is used for receiving data replied by the slave equipment;

a slave device; the slave device includes:

a second receiving unit configured to receive the first broadcast information;

a second storage unit for storing second broadcast information;

a comparison unit, configured to compare the second broadcast information with parameter information of the slave device in the local area network when receiving the message, where if the second broadcast information is the same as the parameter information of the slave device, the slave device replies to the host according to the data instruction, and otherwise, if the second broadcast information is not the same as the parameter information of the slave device, the slave device does not reply to the host;

and the second sending unit is used for sending second broadcast information to the port of the host after receiving the first broadcast information, and replying the host according to the data instruction after the second broadcast information is compared with the parameter information of the host.

7. The system for realizing the communication protocol between the master and the slave of the local area network is characterized by comprising the following components: comprising at least one processor and a memory:

the memory to store one or more program instructions;

the processor is configured to execute one or more program instructions to perform the method according to at least one of claims 1 to 5.

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