CN110730168B - Communication control method and device and server equipment - Google Patents
Communication control method and device and server equipment Download PDFInfo
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- CN110730168B CN110730168B CN201910930316.3A CN201910930316A CN110730168B CN 110730168 B CN110730168 B CN 110730168B CN 201910930316 A CN201910930316 A CN 201910930316A CN 110730168 B CN110730168 B CN 110730168B
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- 238000004891 communication Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000004044 response Effects 0.000 claims abstract description 18
- 230000003993 interaction Effects 0.000 claims abstract description 11
- 238000013524 data verification Methods 0.000 claims description 22
- 238000013507 mapping Methods 0.000 claims description 11
- 230000009191 jumping Effects 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013506 data mapping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
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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
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
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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
Abstract
The invention relates to the technical field of network communication, in particular to a communication control method, a communication control device and server-side equipment, wherein the method comprises the following steps: establishing a communication control protocol stack to intercept access from a client, wherein the communication control protocol stack comprises a data list, the data list records data parameter information of interaction between a server and the client, and the server and the client manage the same data list; the receiving buffer area is circularly scanned through the thread, and the data content from the client is analyzed; after the data content is analyzed, a response message is sent to respond to the client, and the thread is skipped to the starting position of the thread to continue executing the thread until all the access messages of the receiving buffer area are processed.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a communication control method and apparatus, and a server device.
Background
With the continuous development and progress of scientific technology, informatization, digitization and intelligent technology are widely applied to the field of automatic control, and guarantee is provided for the working quality while the accuracy is guaranteed. With the diversification of various data acquisition devices, motion control devices and the like, great challenges are brought to communication networking in order to ensure the high efficiency of data interaction of various devices.
At present, the common communication networking mode in the industrial control field is mainly composed of interfaces such as CAN, RS232, RS485, Ethernet and the like and a protocol stack of an application layer. The application layer protocol stacks are also various, and some protocol stacks are customized by manufacturers and some standard protocol stacks adopt the global standard organization specification. However, these protocol stacks have limitations and cannot be adapted to various types of devices.
Disclosure of Invention
In order to solve the above problems, the present invention provides a communication control method, apparatus and server device, which can be applied to various types of devices.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of communication control, the method comprising:
establishing a communication control protocol stack to intercept access from a client, wherein the communication control protocol stack comprises a data list, the data list records data parameter information of interaction between a server and the client, and the server and the client manage the same data list;
circularly scanning the receiving buffer area through the thread, and analyzing the data content from the client;
and after the data content is analyzed, sending a response message to respond to the client, jumping to the initial position of the thread, and continuously executing the thread until all the access messages of the receiving buffer area are processed.
Further, the analyzing the data content from the client by circularly scanning the receiving buffer through the thread specifically includes:
circularly scanning a receiving buffer area through a thread, and judging whether the receiving buffer area has an access message or not;
when an access message is scanned, checking whether a client corresponding to the access message is matched with a communication address of a server;
when the communication addresses of the client and the server are matched, performing data verification on the access message to generate a data verification result;
and when the data verification result is successful, analyzing the data content of the access message.
Further, the method further comprises:
and mapping data parameter information of the equipment through the data list, wherein the position of the data parameter information in the data list is identified by an index and a sub-index.
Further, the method further comprises:
and identifying the read-write attribute, the data type, the data size and the array length of the server and the client through the data parameter information.
A communication control apparatus, the apparatus comprising:
the access interception module is used for establishing a communication control protocol stack to intercept the access from the client, the communication control protocol stack comprises a data list, the data list records data parameter information of interaction between the server and the client, and the server and the client manage the same data list;
the data content analysis module is used for circularly scanning the receiving buffer area through the thread and analyzing the data content from the client;
and the message response module is used for sending a response message to respond to the client after the data content is analyzed, and jumping to the starting position of the thread to continue executing the thread until all the access messages of the receiving buffer area are processed.
Further, the data content analysis module is specifically configured to:
circularly scanning a receiving buffer area through a thread, and judging whether the receiving buffer area has an access message or not;
when an access message is scanned, checking whether a client corresponding to the access message is matched with a communication address of a server;
when the communication addresses of the client and the server are matched, performing data verification on the access message to generate a data verification result;
and when the data verification result is successful, analyzing the data content of the access message.
Further, the apparatus further comprises:
and the data parameter information mapping module is used for mapping the data parameter information of the equipment through the data list, wherein the position of the data parameter information in the data list is identified by an index and a sub-index.
Further, the apparatus further comprises: and the identification module is used for identifying the read-write attribute, the data type, the data size and the array length of the server and the client through the data parameter information.
A server device, the server device comprising: a receiver, a processor, a transmitter;
the receiver is used for establishing a communication control protocol stack to intercept access from a client, the communication control protocol stack comprises a data list, the data list records data parameter information of interaction between a server and the client, and the server and the client manage the same data list;
the processor circularly scans the receiving buffer area through the thread and analyzes the data content from the client;
the sender judges whether the data content is analyzed, sends a response message to respond to the client after the data content is analyzed, and jumps to the starting position of the thread to continue executing the thread until all the access messages of the receiving buffer area are processed.
The invention has the beneficial effects that:
1. the network management is convenient, all the devices in the whole network manage a data list, and the device has a unique device address, which is equivalent to the data of the whole network to form a library, and all the devices in the network can perform the questioning on the library. The client only needs to know the equipment address of the server and the index of the data to be accessed in the data list, and the method is suitable for various types of equipment.
2. The expansibility is high, the data list reserves the index range to be wide, the data added when the apparatus upgrades can continue to add the new index data at the end of the existing data list, the expansion of the communication interface can also directly increase the definition and drive of a communication interface object, suitable for many kinds of apparatuses.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a flow chart illustrating a communication control method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating step S200 according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication control apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram of an embodiment of a server device according to the present invention.
Detailed Description
The conception, specific structure and technical effects of the present disclosure will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, aspects and effects of the present disclosure. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a communication control method provided by an embodiment of the present disclosure, which performs communication in a client-server model, where an accessed device is a server, a device accessing the server is a client, and each device is assigned an independent communication address during initialization, where the method includes the following steps:
step S100, establishing a communication control protocol stack to intercept access from a client;
the communication control protocol stack comprises a data list, wherein the data list records data parameter information of interaction between a server and a client, and the server and the client manage the same data list.
Step S200, the receiving buffer area is circularly scanned through the thread, and the data content from the client side is analyzed.
Step S300, after the data content is analyzed, sending a response message to respond to the client, and jumping to the initial position of the thread to continue executing the thread until all the access messages of the receiving buffer area are processed.
The data list described in this embodiment is established when a user transplants, the data list records data parameter information of devices, and when initializing, taking ipv4 protocol as an example, a subnet mask range corresponding to a communication address allocated to each device is 1-255, where address 0 is a broadcast address, and all devices can select whether to listen to a broadcast packet according to configuration.
The technical scheme provided by the disclosure can facilitate network management, all devices in the whole network manage a data list, and the device has a unique device address, which is equivalent to the data of the whole network to form a database, and all devices in the network can access the database. The client only needs to know the communication address of the server and the index of the data to be accessed in the data list; meanwhile, the method has higher expansibility and a wide range of reserved indexes of the data list, new index data can be continuously added at the tail of the existing data list by the added data when the equipment is upgraded, and the definition and the drive of one communication interface object can be directly added for the expansion of the communication interface, so that the method is suitable for various types of equipment.
Referring to fig. 2, in a preferred embodiment, the step S200 specifically includes:
step S210, circularly scanning a receiving buffer area through a thread;
step S220, judging whether the receiving buffer area has an access message, if not, jumping to step S210, if yes, executing the following steps;
step S230, checking whether the client corresponding to the access packet matches the communication address of the server, if not, jumping to step S210, if yes, executing the following steps;
in this step, the communication address matching between the client and the server means that the communication address in the index table retrieved by the server coincides with the target communication address to be intercepted.
Step S240, carrying out data verification on the access message to generate a data verification result;
in one example, data verification is performed on the access message, and whether the access message is correct or not can be judged by checking whether a target data address accessed by the client exists or not and whether the data length is within a set range or not;
step S250, judging whether the data verification result is successful, if not, jumping to step S210, and if so, executing the following steps;
and step S260, analyzing the data content of the access message.
In this step, the parsed content includes: reading and writing the device data list and executing a callback function.
The communication control protocol stack also comprises a communication interface, a data processing kernel and a callback function;
in one embodiment, the communication interface may be encapsulated, the communication interface supporting at least one physical interface (including but not limited to RS232 interface, RS485 interface, ethernet interface, SPI interface), each device being provided with one or more communication interfaces, one or more of the communication interfaces managing the same data list; the communication interface is used for data transmission between the equipment and the outside; the communication interface is related to a hardware interface of the equipment, and the bottom layer driver is written and defined by a user.
In this embodiment, the communication packet is identified, verified and processed through the data processing kernel, where the communication packet includes an access packet and a response packet.
The callback function is a data processing function reserved by the communication control protocol stack; the user can write and define the data according to the requirement.
When the device is used as a client to access a server, the communication control protocol stack identifies and verifies the response message, processes the write access response data, does not process the read access response data, and processes the read access response data in a callback function reserved by the protocol stack by a user.
In an improved embodiment, the method further comprises:
and mapping data parameter information of the equipment through the data list, wherein the position of the data parameter information in the data list is identified by an index and a sub-index.
The technical scheme provided by the embodiment has low implementation cost, the data mapping is implemented in a pointer mode, the device data or parameters do not need to be redefined, the source codes are directly added into the existing engineering, the mapping of a data list and the driving of a communication interface are implemented, and finally a protocol stack is initialized; the data mapping is free, and a user can map the same data for multiple times according to the requirement, so that the condition that the client equipment accesses different index data and sends multiple access messages is avoided, and unnecessary network bandwidth waste is caused;
in an improved embodiment, the method further comprises:
and identifying the read-write attributes (read-only, write-only and read-write) of the server and the client, the data type (variable or array), the data size (taking bytes as a unit) and the array length (setting the value as 1 when the array length is a variable) through the data parameter information.
With reference to fig. 3, an embodiment of the present disclosure further provides a communication control apparatus, where the apparatus includes:
the access interception module 100 is configured to establish a communication control protocol stack to intercept an access from a client.
The communication control protocol stack comprises a data list, wherein the data list records data parameter information of interaction between a server and a client, and the server and the client manage the same data list;
a data content analysis module 200, configured to analyze data content from the client by circularly scanning the receiving buffer through the thread;
the message response module 300 is configured to send a response message to respond to the client after the data content is analyzed, and jump to the start of the thread to continue executing the thread until all access messages in the receiving buffer are processed.
In an improved embodiment, the data content parsing module 200 is specifically configured to:
circularly scanning a receiving buffer area through a thread, and judging whether the receiving buffer area has an access message or not;
when an access message is scanned, checking whether a client corresponding to the access message is matched with a communication address of a server;
when the communication addresses of the client and the server are matched, performing data verification on the access message to generate a data verification result;
and when the data verification result is successful, analyzing the data content of the access message.
In a further embodiment, the apparatus further comprises: and the data parameter information mapping module is used for mapping the data parameter information of the equipment through the data list, wherein the position of the data parameter information in the data list is identified by an index and a sub-index.
In a further embodiment, the apparatus further comprises: and the identification module is used for identifying the read-write attribute, the data type, the data size and the array length of the server and the client through the data parameter information.
Referring to fig. 4, an embodiment of the present disclosure further provides a server device, where the server device includes: a receiver 1, a processor 2, a transmitter 3;
the receiver 1 is used to establish a communication control protocol stack to listen for accesses from clients.
The communication control protocol stack comprises a data list, wherein the data list records data parameter information of interaction between a server and a client, and the server and the client manage the same data list;
the processor 2 circularly scans the receiving buffer area through the thread and analyzes the data content from the client;
the sender 3 judges whether the analysis of the data content is finished, sends a response message to respond to the client after the analysis of the data content is finished, and jumps to the starting position of the thread to continue executing the thread until all the access messages of the receiving buffer are processed.
In an improved embodiment, the processor 2 is further configured to:
circularly scanning a receiving buffer area through a thread, and judging whether the receiving buffer area has an access message or not;
when an access message is scanned, checking whether a client corresponding to the access message is matched with a communication address of a server;
when the communication addresses of the client and the server are matched, performing data verification on the access message to generate a data verification result;
and when the data verification result is successful, analyzing the data content of the access message.
In a modified embodiment, the receiver 1 is further configured to: and mapping data parameter information of the equipment through the data list, wherein the position of the data parameter information in the data list is identified by an index and a sub-index.
In a modified embodiment, the receiver 1 is further configured to: and identifying the read-write attribute, the data type, the data size and the array length of the server and the client through the data parameter information.
It should be understood that the above-mentioned apparatus may be preset in the device, and may also be loaded into the device by downloading or the like. The communication method adopts a client-server model for communication, accessed equipment is a server, equipment for accessing the server is a client, and corresponding module units in the device can be mutually matched with module units in client equipment to realize the communication scheme.
The implementation process of the functions and actions of each unit in the above device is specifically described in the implementation process of the corresponding step in the above method, and is not described herein again.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the application. One of ordinary skill in the art can understand and implement it without inventive effort.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (9)
1. A communication control method is characterized in that communication is carried out in a client-server model mode, accessed equipment is a server, equipment accessing the server is a client, and each piece of equipment is allocated with a communication address which is independent of each other during initialization, and the method comprises the following steps:
establishing a communication control protocol stack to intercept access from a client, wherein the communication control protocol stack comprises a data list, the data list records data parameter information of interaction between a server and the client, the server and the client manage the same data list, and the server and the client both have a unique device address;
circularly scanning the receiving buffer area through the thread, and analyzing the data content from the client;
and after the data content is analyzed, sending a response message to respond to the client, jumping to the initial position of the thread, and continuously executing the thread until all the access messages of the receiving buffer area are processed.
2. The communication control method according to claim 1, wherein the parsing of the data content from the client by the thread-loop scanning of the receive buffer is specifically:
circularly scanning a receiving buffer area through a thread, and judging whether the receiving buffer area has an access message or not;
when an access message is scanned, checking whether a client corresponding to the access message is matched with a communication address of a server;
when the communication addresses of the client and the server are matched, performing data verification on the access message to generate a data verification result;
and when the data verification result is successful, analyzing the data content of the access message.
3. The communication control method according to claim 1, characterized in that the method further comprises:
and mapping data parameter information of the equipment through the data list, wherein the position of the data parameter information in the data list is identified by an index and a sub-index.
4. The communication control method according to claim 3, characterized in that the method further comprises:
and identifying the read-write attribute, the data type, the data size and the array length of the server and the client through the data parameter information.
5. A communication control device is characterized in that communication is carried out in a client-server model mode, accessed equipment is a server, equipment accessing the server is a client, and each piece of equipment is allocated with a communication address which is independent of each other during initialization, the device comprises:
the access interception module is used for establishing a communication control protocol stack to intercept the access from the client, the communication control protocol stack comprises a data list, the data list records data parameter information of interaction between the server and the client, the server and the client manage the same data list, and the server and the client have a unique equipment address;
the data content analysis module is used for circularly scanning the receiving buffer area through the thread and analyzing the data content from the client;
and the message response module is used for sending a response message to respond to the client after the data content is analyzed, and jumping to the starting position of the thread to continue executing the thread until all the access messages of the receiving buffer area are processed.
6. The communication control apparatus according to claim 5, wherein the data content parsing module is specifically configured to:
circularly scanning a receiving buffer area through a thread, and judging whether the receiving buffer area has an access message or not;
when an access message is scanned, checking whether a client corresponding to the access message is matched with a communication address of a server or not;
when the communication addresses of the client and the server are matched, performing data verification on the access message to generate a data verification result;
and when the data verification result is successful, analyzing the data content of the access message.
7. The communication control apparatus according to claim 5, wherein the apparatus further comprises:
and the data parameter information mapping module is used for mapping the data parameter information of the equipment through the data list, wherein the position of the data parameter information in the data list is identified by an index and a sub-index.
8. The communication control apparatus according to claim 7, wherein the apparatus further comprises: and the identification module is used for identifying the read-write attribute, the data type, the data size and the array length of the server and the client through the data parameter information.
9. A server device, wherein a client-server model is used for communication, an accessed device is a server, a device accessing the server is a client, and each device is assigned a communication address independent of each other during initialization, the server device comprising: a receiver, a processor, a transmitter;
the receiver is used for establishing a communication control protocol stack to intercept access from a client, the communication control protocol stack comprises a data list, the data list records data parameter information of interaction between a server and the client, the server and the client manage the same data list, and the server and the client both have a unique device address;
the processor circularly scans the receiving buffer area through the thread and analyzes the data content from the client;
and the sender judges whether the data content is analyzed, sends a response message to respond to the client after the data content is analyzed, and jumps to the starting position of the thread to continue executing the thread until all the access messages of the receiving buffer area are processed.
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