CN106060066A - Embedded linux-based method for realizing terminal maintenance and information release - Google Patents
Embedded linux-based method for realizing terminal maintenance and information release Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 135
- 238000012423 maintenance Methods 0.000 title claims abstract description 61
- 230000008569 process Effects 0.000 claims abstract description 109
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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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
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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Abstract
The present invention relates to an embedded linux-based method for realizing terminal maintenance and information release. According to the method, information interaction between an embedded web server and all functional modules of an electricity information collection terminal system is realized by using a common gateway interface (CGI) mechanism; and a client can visit an electricity information collection terminal service process by installing a web browser in a local computer, so that electricity information collection terminal maintenance and information release are realized. Without being limited by time and space, the user uses the WEB browser to visit, monitor and maintain a far end electricity information collection terminal through the Internet, specific software is not installed, and the method has the characteristic of cross-platform. An operator does not need to go to the site to operate, and the electricity information collection terminal maintenance is more conveniently, is real-time, and is efficient and safe.
Description
Technical field
The present invention relates to power utilization information collection system field used for intelligent electric network, be specifically related to a kind of real based on embedded Linux
The method that existing terminal maintenance and information are issued.
Background technology
Along with the development of Internet technology, embedded device management and mutual in, take based on embedded type web
The development and application of business device becomes main flow.The general B/S structure that uses, i.e. runs a web server on embedded device, should
Server needs to support script or CGI function, uses this structure to realize the generation of dynamic page.User has only in client
Just can be realized the management to embedded device by web browser conveniently and efficiently, monitor and safeguard.
Power information acquisition terminal is the equipment gathering each information gathering point power information, it is possible to achieve electric energy meter data
Collection, data management, data double-way transmission and forward or perform control command equipment.Power information acquisition terminal is by answering
The classes such as special transformer acquisition terminal, centralized automatic meter-reading terminal (including concentrator, harvester), distributed energy monitor terminal it are divided into place
Type.
Power information acquisition terminal is in During Process of Long-term Operation, because of complexity, the multiformity of running environment, polytropy and product
The factors such as the limitation of product service life and developer's thinking logic, the routine maintenance for product is particularly important.Use telecommunications
Breath acquisition terminal is on stream, it is also desirable to be analyzed the problem run into during exploitation accurate and effective orientation problem
Place, maintenance and problem investigation method currently for power information acquisition terminal have following several:
1, by log information and running log record terminal operating situation.Power information acquisition terminal increase log information or
Running log writing function, power information acquisition terminal in running, can by its mutual message with other equipment or
Self-operating log recording, in specific file, when on-site terminal needs to safeguard, then uses third party's instruments such as FTP, SSH to incite somebody to action
Message or daily record are derived to local, by being analyzed determining problem place to message or running log；2, controlled by system
Acquisition terminal is safeguarded by platform.Various Linux can be performed by system control position to instruct, it is achieved system administration, process pipe
Reason, checks system information, stack information, creates, replicates, moves, edits, deletes the correlation function such as file or catalogue, comes with this
Reach the maintenance function to acquisition terminal linux system；
3, use field maintenance device that acquisition terminal is safeguarded.Scene can use palm machine to join acquisition terminal
Number inquiry and setting, it is also possible to acquisition terminal is carried out application program updating, if combining copy controller can realize acquisition terminal load
Ripple is checked meter the investigation of aspect problem, can monitor acquisition terminal by power line carrier with have the mutual of harvester or carrier wave meter under its command
Message；
4, use special maintenance software that acquisition terminal is safeguarded.The necessity safeguarded in view of acquisition terminal, typically
Each acquisition terminal manufacturer has all developed and has safeguarded software accordingly, it is possible to achieve look into parameter setting, the parameter of acquisition terminal
The correlation function such as ask, remotely controls, application program updating, terminal resets, inquiry data, forwarding are checked meter；
5, use liquid crystal interface that acquisition terminal is safeguarded.Although Guo Wang company to the display content of liquid crystal display screen (LCD),
Format, arrangement position etc. have respective specified, but can be by being extended liquid crystal interface, real in extension liquid crystal interface
The now maintenance function to acquisition terminal, it is also possible to realize the real-time display to acquisition terminal with each equipment mutual message；
6, use main station system that acquisition terminal is safeguarded.Main station system is powerful, it is possible to record main website and electricity consumption
The mutual message of information acquisition terminal, can carry out the operations such as parameter setting, inquiry, can inquire about the history of terminal inner storage
Data, can realize the maintenance function to acquisition terminal to a certain extent.
But there is following several respects defect in the above-mentioned several maintaining methods that presently, there are:
1, mutual message or log recording function need acquisition terminal in real time in storage device write terminal set with other
Standby mutual message or system running log, cause the operation to storage device excessively frequent, can have a strong impact on storage device
In service life, the flash equipment at file system place is easily caused to produce bad block；
2, use the softwares of the third party such as SSH, FTP, hyper terminal or special maintenance software that acquisition terminal is safeguarded, big portion
Dividing and need to install, common customer considers system run all right and safety factor, forbids installing similar software in main website side,
As needed to use, then must carry equipment such as being provided with the notebook of corresponding software, netting twine and operate to scene, much gather end
End installation site is more remote, is even arranged in the distribution box that position is higher, and on-site maintenance operation easier is very big, acquisition terminal
Frequency faces high pressure equipment, and misoperation can affect personal safety；
3, real-time can not be guaranteed.Mutual message or running log are in recording process, for preventing log file excessive,
Need file carries out periodically cutting, or limit the size of message file, if acquisition terminal message exports to this not in time
Be analyzed, perhaps can affect the ageing of message and integrity；
4, the above-mentioned several maintaining methods that presently, there are all cannot realize the maintenance to acquisition terminal system from hardware view,
Do not possess inquiry hardware register and the function of configuration hardware register, the most not Inspection and maintenance to bottom hardware driver
Function；
5, all cannot be realized linux system, application program, file system by any of the above described a kind of maintaining method merely
System, the full maintenance of bottom layer driving, need to combine above-mentioned multiple maintaining method and between different software switching realize gathering
Terminal maintenance, operation complexity, but also limited by software running platform, just need to install because of software, therefore, associated maintenance operates
Must go to on-the-spot execution；
6, use palm machine and copy controller that on-site terminal is safeguarded, need the palm machine software journey that relevant manufacturers exploitation is corresponding
Sequence, copy controller directly contacts electric lines of force also can affect equipment and personal safety, and on-site maintenance adds maintenance cost；
7, use the softwares such as SSH, FTP that acquisition terminal file system is operated, easily revise the file of some file
Name and file content, cause the data failure of vital document, affects the stability that system is run, easily causes customers' conflict event and send out
Raw.
Summary of the invention
For the problems referred to above, the present invention provides a kind of limitation that can break existing maintenance mode, strengthens power information
Acquisition terminal safety, real-time and motility in maintenance process realize terminal maintenance and letter based on embedded Linux
The method that breath is issued.
For solving the problems referred to above, the technical scheme that the present invention takes is: realize terminal maintenance and letter based on embedded Linux
The method that breath is issued, comprises the steps:
The transplanting of the embedded web server that step one, offer CGI support
First from official website, download embedded web server source code, select suitable compiler to enter according to Target Board
Row source code compiles, and compiled file destination and configuration file is copied under Target Board respective directories and is taken by embedded type web
Business device process is arranged to acquisition terminal start self-starting；
Currently used popular embedded web server has thttpd, boa, go ahead etc., and these several moneys are embedded
Well support can be transplanted in linux system and be provided CGI to web server easily, and the design is selected
CGI, is because CGI performance and compatibility is relatively good, can support that polyglot is developed, and transplantability is relatively good, and this maintenance is
Uniting the not harshest for concurrent demand, CGI can meet design requirement completely.
Step 2, the design of login authentication interface html list
Login authentication interface, for the use authority of the user of authentication-access embedded web server, also possesses amendment and uses
Name in an account book and the function of password；When need to user input username and password verify or by user change user name and
Password is set up TCP and is connected and information is passed to the CGI process of web server end and process when sending web server to；
In login authentication interface form, embed JavaScript script, provide prompting letter when user's input information is the most full-time
Breath, when user exists change user name, cryptography requirements when, dynamically displaying user name, password amendment interface (include inputting former
Input frames such as user name, original code, new user name, confirmation new user name, new password, confirmation new password possessing determine, cancel,
Button is submitted in logins etc. to), only as the user needing the username and password that user is inputted to verify or user to be changed
Name and password are just set up TCP when sending server to and are connected and information is passed to the CGI process of server end and process, login
Authentication interface html form design is stored in what Target Board web server configuration file was specified with .html formatted file after completing
Under catalogue.
Step 3, functional part select the design of interface html list
Functional part select interface provide each maintenance function entrance, including linux system safeguard, application process safeguard,
File system is mutual, bottom layer driving is mutual, debugging interface, and functional part is civilian with .html form after selecting INTERFACE DESIGN to complete
Part is stored under the catalogue that Target Board web server configuration file is specified；
Step 4, client list design with CGI process interface Extended Protocol
The design each function of client list submits the Interface Expanding agreement between button and CGI process to, uses list variable
FCCV distinguishes the big class of following functions: log-on message checking, linux system are safeguarded, application process is safeguarded, file system is mutual, the end
Layer drives mutual, debugging interface；The big class of each function has each subfunction under its command and uses application level function code AFN to make a distinction；
User clicks on certain in client browser and submits button to, and form data can be submitted to service by browser
Device, server is passed CGI process by standard output oral instructions and is processed, in view of the service type of client submission is the most,
Need to design each function of html list and submit the Interface Expanding agreement between button and CGI process to.
Step 5, CGI(Common gateway interface) cgi script design
The function that CGI(Common gateway interface) cgi script mainly realizes has: user login information processes, the request of customer in response end is right
Linux system carries out safeguarding, customer in response end request application processes carries out safeguarding, the request of customer in response end is entered with file system
Row is mutual, bottom hardware driving is interacted, provides debugging interface to realize single line in application processes by the request of customer in response end
The functions such as the debugging of journey.According to modular design method and scalability requirement, each CGI function uses difference in functionality module
Realize: from environmental variable REQUEST_METHOD, first obtain client table forms data way of submission, if GET mode,
From environmental variable QUERY_STRING, then obtain client submit data to, if POST mode, then obtain from standard input port
Take client and submit data to.Then according to URL encoding and decoding are regular, it is decoded the client table forms data received processing, from
The form data parsed enters following different functional module program according to values different for list variable FCCV process:
Log-on message authentication module, linux system maintenance module, application process maintenance module, file system interactive module, bottom layer driving
Interactive module, debugging interface module.
The relevant information that the present invention uses active document technology to input client carries out anticipation；Use CGI(Common gateway interface)
It is mutual with the information of the power information each functional module of acquisition terminal system that CGI mechanism realizes embedded web server；For answering
With, client has only to install in a local computer web browser, it is possible to access power information acquisition terminal service routine,
Realize power information acquisition terminal to safeguard and information issue.
The process of log-on message authentication module comprises the steps: whether there is passwdnet under a. inspection/etc catalogue
File, if it does not exist, then newly-built passwdnet file, and default username and password (being admin) are encrypted place
Write in passwdnet file after reason；
B. log-on message authentication module is divided into two subfunctions according to application level function code AFN: user login information is verified
Revise with user login information；If user login information checking then performs step c, if user login information amendment then performs
Step d；
C. open/etc catalogue under passwdnet file, from file, read the username and password of encryption, to visitor
The username and password that family end sends is encrypted, if the two is consistent, then log-on message is proved to be successful, then by functional part
Interface html formfile is selected to submit client to；If the two is inconsistent, then returns user's authentication failed information, and login is recognized
Card interface html formfile submits client to；
D. open/etc catalogue under passwdnet file, from file, read the username and password of encryption, to visitor
Original subscriber's name and password that family end sends are encrypted, if the two is consistent, then new user name and password are encrypted place
Writing passwdnet file after reason, and submit login authentication interface html formfile to client, username and password is repaiied
Make merit into；If the two is inconsistent, then return original subscriber's name or code error information, and by login authentication interface html formfile
Submit client to.
The process of linux system maintenance module comprises the steps:
A. obtaining the Linux instruction that will perform the form data after decoding, calling system function popen completes
The execution of Linux instruction.On the one hand popen function creates subprocess execution shell-command and completes the execution of Linux instruction, separately
On the one hand the pipeline between CGI process and subprocess is further created；
B. for inquiry class Linux instruction, CGI process obtains subprocess by the pipeline between itself and the subprocess that create
The data returned, return to client according to after CGI coding criterion and html format analysis processing by standard output to returning data；
C. for performing the instruction of class Linux, after calling popen function, popen function return value is first determined whether, if returning
Return NULL, then explanation instruction performs failure, by standard output mouth, instruction execution failure information is returned to client, if returned
Returning value is not NULL, then query statement performs result, if meeting the requirements, then explanation instruction runs succeeded, and instruction is run succeeded
Information returns to client by standard output mouth, if continuous-query 3 times is the most undesirable, then explanation instruction performs
Failure, performs instruction unsuccessfully information and returns to client by standard output mouth.
The process of application process maintenance module comprises the steps:
A, application process maintenance module perform different sub-function module according to application level function code AFN difference: to collection
The parameter query of terminal, parameter are arranged, long-range control, terminal resets, software upgrading, data query, manual framing；
B, form data after decoding obtain application level function code AFN, information point Pn, info class Fn and data sheet
Metadata, carries out framing process according to the communication protocol between main website and terminal that Guo Wang company stipulations specify；
Frame is sent to application process by interprocess communication mode and processes by c, CGI process；
D, CGI process receives the Echo Frame that application process returns, if time-out does not receives the Echo Frame of application process, then returns
Mistake；
The Frame that e, parsing receive, according to the application level function code AFN of this sub-function module performed, determines and needs
The data of parsing are loaded in corresponding list during rebuilding list content and return to client by list content to be rebuild
End browser.The process of file system interactive module comprises the steps:
A, file interaction module perform different subfunction according to application level function code AFN difference: log file download, should
With program file renewal, the renewal of cgi script file, driver update, user-defined file is downloaded, user-defined file is uploaded, but
It is mainly to include two parts from the point of view of entirety: uploading and downloading of file, if files passe, then goes to step b, if under file
Carry, then go to step c；
B, first form data after decoding obtain this condition code and the catalogue of upper transmitting file and filename,
Judge the end of condition code and the beginning of file data, then according to different subfunctions under corresponding catalogue newly-built accordingly
Temporary file, is written to the file data read from standard input port in newly-built temporary file, and data have write afterwards will
Original is deleted, and temporary file name is modified as the filename of original, and going wrong during files passe then will be interim
File is deleted and returns, to client browser, the prompting that files passe is failed；
C, first form data after decoding obtain the place catalogue of file and filename needing to download, then
Under assigned catalogue, find corresponding file and file content is sent to client browser by standard output port.
Bottom layer driving interactive module performs different subfunctions according to application level function code AFN difference: post bottom hardware
The inquiry of storage, configuration and the Applied layer interface function providing each bsp driver are tested.
The process of debugging interface module is as follows: firstly the need of by the file destination after each multi-threaded program compiling to be debugged
Uploading under acquisition terminal particular category, then by interprocess communication mode, CGI notifies that application process stops thread to be debugged
Operation, CGI process is initiated a subprocess and also the operation code of subprocess is replaced to thread code to be debugged, makes thread
A subprocess as CGI process runs, and by standard output oral instructions, the Debugging message in running is delivered to client
End shows, by the analysis of Debugging message judges the problem source of this thread in client.
Beneficial effects of the present invention is as follows:
1, evade the software login storage devices such as FTP and the risk of file content has likely been deleted or modified, download file
The Shi Caiyong CGI each file of indirect operation file system, is also first to write file data to interim literary composition when of upper transmitting file
In part, question paper write success and data carry out file replacement the most again, do not exist and delete file or amendment file content by mistake
Risk, it is ensured that acquisition terminal system run safety and stability；
2, user can not be limited by space-time, utilizes web browser to complete far-end power information by Internet and adopts
The access of collection terminal, monitor and the operation such as maintenance, it is not necessary to specific software is installed, there is cross-platform characteristic, breach acquisition terminal
It is difficult to the limitation of remote maintenance, impact on power information acquisition system in maintenance process is preferably minimized limit；
3, the direct contact to electric lines of force or high pressure equipment in maintenance process is avoided, it is ensured that personal safety；
4, message and the system that can download acquisition terminal record in power information acquisition system main website side in real time run day
Will, it is ensured that message and the real-time of system running log and effectiveness, it is possible to provide effectively opinion for terminal maintenance to greatest extent
According to；
5, possess the detection function to bottom hardware equipment, from hardware view, acquisition terminal can be safeguarded, permissible
Inquiring about hardware register independent of application process or configure, each function of application interface simultaneously provided driver is entered
Row test；
6, this maintenance system provides debugging interface, can be adjusted separately through debugging interface by each for application process thread
Examination；
7, WEB is used to issue organic combination together the multiple acquisition terminal maintenance mode that presently, there are, it is to avoid the
Software of the third party needs to install registration and is limited by software platform and need switch between different software to bother in maintenance process.
8, real time inspection terminal inner actual operating state can be instructed by Linux, truly realize terminal fortune
The monitoring in real time of row, in real time control, real-time management.
9, using modular design method to carry out CGI software program design, autgmentability is good；
10, design process possesses the link such as authentication and encryption, it is to avoid abnormal operation issuable impact, peace
Full property is preferable；
11, message and system running log writing function can be turned on and off by client browser real time remote,
Avoid that message and the frequent erasable flash of system running log during terminal operating cause produced the storage device life-span
Impact；
12, compared to the interface between server and the application process of interpreted languages realization, compiled language is used more
Can guarantee that the safety of system, it also avoid the trouble needing to increase interpreter in acquisition terminal system；
13, terminal maintenance and information issuing system are realized based on embedded Linux, can be according to the inhomogeneity of acquisition terminal
Type and performance, carry out function cutting and Function Extension, flexibly closer to maintenance needs.
Detailed description of the invention
A kind of realize the method that terminal maintenance and information are issued based on embedded Linux, comprise the steps:
The transplanting of the embedded web server that step one, offer CGI support
First from official website, download embedded web server source code, select suitable compiler to enter according to Target Board
Row source code compiles, and compiled file destination and configuration file is copied under Target Board respective directories and is taken by embedded type web
Business device process is arranged to acquisition terminal start self-starting；
Step 2, the design of login authentication interface html list
Login authentication interface, for the use authority of the user of authentication-access embedded web server, also possesses amendment and uses
Name in an account book and the function of password；When need to user input username and password verify or by user change user name and
Password is set up TCP and is connected and information is passed to the CGI process of web server end and process when sending web server to, log in
Authentication interface is stored under the catalogue that Target Board web server configuration file is specified with .html formatted file after having designed；
Step 3, functional part select the design of interface html list
Functional part select interface provide each maintenance function entrance, including linux system safeguard, application process safeguard,
File system is mutual, bottom layer driving is mutual, debugging interface, and functional part is civilian with .html form after selecting INTERFACE DESIGN to complete
Part is stored under the catalogue that Target Board web server configuration file is specified；
Step 4, client list design with CGI process interface Extended Protocol
The design each function of client submits the Interface Expanding agreement between button and CGI process to, uses list variable FCCV
Distinguish the big class of following functions: log-on message checking, linux system are safeguarded, application process is safeguarded, file system is mutual, bottom drives
Dynamic mutual, debugging interface；The big class of each function has each subfunction under its command and uses application level function code AFN to make a distinction, and sees following table:
Corresponding relation between FCCV value and the big class of each function
| FCCV | Functional part title |
| 0x00 | Log-on message is verified |
| 0x01 | Linux system is safeguarded |
| 0x02 | Application process is safeguarded |
| 0x03 | File system is mutual |
| 0x04 | Bottom layer driving is mutual |
| 0x05 | Debugging interface |
Log-on message checking include user login information checking and user login information revise two subfunctions, AFN value and
Corresponding relation between subfunction sees following table:
AFN value verifies each subfunction corresponding relation with log-on message
Application process safeguards a series of functions mainly realizing special maintenance software, continues to use the master that Guo Wang company stipulations specify
Standing and terminal communication protocol, divide it according to application level function code difference, AFN value is with each subfunction corresponding relation such as
Under, info class that each subfunction is corresponding and the communication protocol that information point is also fully consistent with between main website and terminal:
AFN value safeguards each subfunction corresponding relation with application process
File system mainly realizes uploading and download function of file, is directed to application program, CGI, driving
Corresponding relation between the mutual each subfunction of the upgrading of program etc., AFN value and file system sees following table:
AFN value and the mutual each subfunction corresponding relation of file system
| AFN | Subfunction title |
| 0x00 | Log file download |
| 0x01 | Application file updates |
| 0x02 | Cgi script file updates |
| 0x03 | Driver file updates |
| 0x04 | User-defined file is downloaded |
| 0x05 | User-defined file is uploaded |
Bottom layer driving mainly realizes the inquiry to hardware register, setting and the test merit to each driver
Can, corresponding relation such as following table:
AFN value and the mutual each subfunction corresponding relation of bottom layer driving
| AFN | Subfunction title |
| 0x00 | Depositor is inquired about |
| 0x01 | Depositor is arranged |
| 0x02 | Driver is tested |
Step 5, CGI(Common gateway interface) cgi script design
1, form data obtains: obtains information between server and CGI process from environmental variable REQUEST_METHOD and passes
Pass mode, if GET mode, then from environmental variable QUERY_STRING, obtain form data, if POST mode, first
Obtain the length of form data from environmental variable CONTENT_LENGTH, then read the list of regular length from standard input port
Data；
2, URL decoding: according to URL encoding and decoding rule, is decoded the form data received processing, the table analytically gone out
Forms data enters different functional module programs according to values different for FCCV process, following 38；
3, log-on message authentication module processes.
A. whether there is passwdnet file under inspection/etc catalogue, if it does not exist, then newly-built passwdnet file,
And default username and password (can specify voluntarily) are encrypted afterwards write passwdnet file in；
B. user login information authentication module (FCCV=0x00) mainly includes two subfunctions: user login information is verified
Revise with user login information.If AFN is 0x00, then perform step c, if AFN is 0x01, then perform step d；
C. user login information verification process.Open/etc catalogue under passwdnet file, read at encryption from file
The username and password of reason, the username and password sending client is encrypted, if the two is consistent, then log-on message
It is proved to be successful, then functional part selects interface html formfile submit client to；If the two is inconsistent, then returns user and test
Card failure information, and submit user's login interface html formfile to client；
D. user login information amendment processes.Open/etc catalogue under passwdnet file, read at encryption from file
The username and password of reason, the original subscriber's name and the password that send client are encrypted, if the two is consistent, then will newly use
Name in an account book and password are encrypted write passwdnet file afterwards, and are submitted to by user's login interface html formfile
Client, username and password is successfully modified；If the two is inconsistent, then returns original subscriber's name or code error information, and will use
Family login interface html formfile submits client to.
4, linux system maintenance module processes.
A. obtaining the Linux instruction that will perform the form data after decoding, calling system function popen completes
The execution of Linux instruction.On the one hand popen function creates subprocess execution shell-command and completes the execution of Linux instruction, separately
On the one hand the pipeline between CGI process and subprocess is further created；
B. for inquiry class Linux instruction, CGI process obtains subprocess by the pipeline between itself and the subprocess that create
The data returned, return to client according to after CGI coding criterion and html format analysis processing by standard output to returning data；
C. for performing the instruction of class Linux, after calling popen function, popen function return value is first determined whether, if returning
Return NULL, then explanation instruction performs failure, by standard output mouth, instruction execution failure information is returned to client, if returned
Returning value is not NULL, then query statement performs result, if meeting the requirements, then explanation instruction runs succeeded, and instruction is run succeeded
Information returns to client by standard output mouth, if continuous-query 3 times is the most undesirable, then explanation instruction performs
Failure, performs instruction unsuccessfully information and returns to client by standard output mouth.
5, application process maintenance module processes.
A, application process maintenance module (FCCV=0x02) mainly realize the parameter query to acquisition terminal, parameter is arranged,
The subfunctions such as long-range control, terminal resets, software upgrading, data query, manual framing, perform different according to different AFN
Sub-function module；
B, form data after decoding obtain application level function code AFN, information point Pn, info class Fn and data sheet
Metadata, carries out framing process according to the communication protocol between main website and the terminal of state's net corporate policy；
C, by interprocess communication mode (can be realized by modes such as shared drive, message queue, pipelines) by data
Frame is sent to application process and processes；
D, reception application process are sent to the Echo Frame of CGI process.If time-out does not receives the Echo Frame of application process, then return
Return mistake；
The Frame that e, parsing receive, according to the AFN of this sub-function module performed, determines the webpage needing to rebuild
The data of parsing are loaded in corresponding list during rebuilding web page contents and return to client browser by content.
6, file system interactive module processes.
A, file system interactive module (FCCV=0x03) mainly realize uploading and download function of file, according to different
AFN performs log file download, application program update, cgi script renewal, driver update, self-defined download respectively, makes by oneself
Justice is uploaded, and the essence of each sub-function module is all the application with download function of uploading of file, but distinguishes as shown in the table:
If desired perform files passe, then go to step b, if desired perform file download, then go to step c；
B, files passe.The general POST mode that uses, first obtains this feature the form data after decoding
Code and the catalogue of upper transmitting file and filename, can judge the end of condition code and opening of file data by character ‘ r n '
Begin, then according to different subfunctions newly-built corresponding temporary file under corresponding catalogue, by read from standard input port
File data is written in newly-built temporary file, and original is deleted after having write by data, and temporary file name is revised
Become the filename of original.Notice that application program, cgi script, driver file need checking in view of safety before uploading
Username and password, goes wrong during files passe and is then deleted by temporary file and return on file to client browser
Pass failed prompting；
C, file download.The general GET mode that uses, first obtains, the form data after decoding, the literary composition needing to download
The place catalogue of part and filename, then find corresponding file and by file content by standard output end under assigned catalogue
Mouth is sent to client browser.
7, bottom layer driving interactive module processes.
Bottom layer driving interactive module (FCCV=0x04) mainly realizes the inquiry to bottom hardware depositor, configuration and to often
Individual bsp driver carries out the function tested., hardware implementations difference different according to acquisition terminal type, this module relates to
The flow process of the driver needing inquiry and the depositor number of configuration, type and needs test arrived is the most inconsistent；Such as, one
As acquisition terminal all possess AC sampling chip, processor and friendship and adopt between chip by SPI communication, AC sampling chip wraps
Containing various depositors, some of which depositor is the calibration factor of configuration carrying out exchange calibration when, works as AC sampling
After going wrong, first we just can test SPI driving by this module and wait the most normal, if driver is normal, and can
To inquire about the configuring condition of depositor, read calibration factor therein and calculate, it may be judged whether calibration factor occurs abnormal
Deng, this part can diagnose the special circumstances such as driver is abnormal, hardware configuration is abnormal, hardware device is abnormal；
8, debugging interface resume module.
Debugging interface module is that each thread of application program is individually debugged and provided interface.Firstly the need of by each line to be debugged
File destination after Cheng Chengxu compiling uploads under acquisition terminal particular category, and then CGI is led to by interprocess communication mode
Knowing that application process stops the operation of thread to be debugged, then CGI process initiates a subprocess and by the operation code of subprocess
Replace to thread code to be debugged, make thread run as a subprocess of CGI process, and by the debugging in running
Information is delivered to client by standard output oral instructions and is shown, by the analysis of Debugging message being judged this line in client
Which part existing problem of journey.
Claims (7)
1. realize terminal maintenance and the method for information issue based on embedded Linux, it is characterised in that comprise the steps:
The transplanting of the embedded web server that step one, offer CGI support
First download embedded web server source code from official website, then select suitable compiler to carry out according to Target Board
Source code compiles, and compiled file destination and configuration file is copied under Target Board respective directories and by embedded type web service
Device process is arranged to acquisition terminal start self-starting；
Step 2, the design of login authentication interface html list
Login authentication interface, for the use authority of the user of authentication-access embedded web server, also possesses amendment user name
Function with password；When needing the username and password of user's input to be verified or by the username and password of user's change
Set up TCP when sending web server to connect and information is passed to the CGI process of web server end and process, login authentication
INTERFACE DESIGN completes to leave under the catalogue that Target Board server profile is specified with .html formatted file；
Step 3, functional part select the design of interface html list
Functional part selects interface to provide the entrance of each maintenance function, including linux system maintenance, application process maintenance, file
System interaction, bottom layer driving are mutual, debugging interface, and functional part selects INTERFACE DESIGN to complete to leave in .html formatted file
Under the catalogue that Target Board server profile is specified；
Step 4, client list design with CGI process interface Extended Protocol
The design each function of client list submits the Interface Expanding agreement between button and CGI process to, uses list variable FCCV
Distinguish the big class of following functions: log-on message checking, linux system are safeguarded, application process is safeguarded, file system is mutual, bottom drives
Dynamic mutual, debugging interface；The big class of each function has each subfunction under its command and uses application level function code AFN to make a distinction；
Step 5, CGI(Common gateway interface) cgi script design
First CGI process obtains form data from environmental variable REQUEST_METHOD and submits mode, if GET mode, then
Obtain list data delivery from environmental variable QUERY_STRING, if POST mode, then from standard inputs, obtain list
Data delivery；Then according to URL encoding and decoding are regular, it is decoded the form data received processing, the list number analytically gone out
Enter following different functional module program according to the middle value different according to list variable FCCV to process: log-on message checking mould
Block, linux system maintenance module, application process maintenance module, file system interactive module, bottom layer driving interactive module, debugging
Interface module.
The most according to claim 1 realizing the method that terminal maintenance and information are issued based on embedded Linux, its feature exists
In: in step 5, the process of log-on message authentication module comprises the steps:
A. whether there is passwdnet file under inspection/etc catalogue, if it does not exist, then newly-built passwdnet file, and right
Default username and password are encrypted and write in passwdnet file afterwards；
B. log-on message authentication module is divided into two subfunctions according to application level function code AFN difference: user login information is verified
Revise with user login information；If user login information checking then performs step c, if user login information amendment then performs
Step d；
C. open/etc catalogue under passwdnet file, from file, read the username and password of encryption, to client
The username and password sent is encrypted, if the two is consistent, then log-on message is proved to be successful, and is selected by functional part
Interface html formfile submits client to；If the two is inconsistent, then returns user's authentication failed information, and login is recognized
Card interface html formfile submits client to；
D. open/etc catalogue under passwdnet file, from file, read the username and password of encryption, to client
The original subscriber's name and the password that send are encrypted, if the two is consistent, then new user name and password are encrypted it
Rear write passwdnet file, and login authentication interface html formfile is submitted to client, prompting user use new user
Name and new password log in；If the two is inconsistent, then return original subscriber's name or password authentification failure information, and by login authentication interface
Html formfile submits client to.
The most according to claim 1 realizing the method that terminal maintenance and information are issued based on embedded Linux, its feature exists
In: in step 5, the process of linux system maintenance module comprises the steps:
A, from decoding after form data obtain will perform Linux instruction, calling system function popen completes
The execution of Linux instruction；On the one hand popen function creates subprocess execution shell-command and completes the execution of Linux instruction, separately
On the one hand the pipeline between CGI process and subprocess is further created；
B, for inquiry class Linux instruction, CGI process obtains subprocess by the pipeline between itself and the subprocess that create and returns
Data, to return data return to client according to after CGI coding criterion and html format analysis processing by standard output；
C, for perform class Linux instruction, after calling popen function, first determine whether popen function return value, if return
NULL, then explanation instruction performs failure, by standard output mouth, instruction execution failure information is returned to client, if returned
Value is not NULL, then query statement performs result, if meeting the requirements, then explanation instruction runs succeeded, and instruction being run succeeded carries
Showing that information returns to client by standard output mouth, if continuous-query 3 times is the most undesirable, then explanation instruction performs mistake
Lose, instruction is performed unsuccessfully information and returns to client by standard output mouth.
The most according to claim 1 realizing the method that terminal maintenance and information are issued based on embedded Linux, its feature exists
In: in step 5, the process of application process maintenance module comprises the steps:
A, application process maintenance module perform different sub-function module according to application level function code AFN difference: to acquisition terminal
Parameter query, parameter arrange, remotely control, terminal resets, software upgrading, data query, manual framing；
B, form data after decoding obtain application level function code AFN, information point Pn, info class Fn and number of data units
According to, carry out framing process according to the communication protocol between main website and the terminal of regulation；
Frame is sent to application process by interprocess communication mode and processes by c, CGI process；
D, CGI process receives the Echo Frame that application process returns, if time-out does not receives the Echo Frame of application process, then CGI process
Return mistake；
The Frame that e, parsing receive, according to the application level function code AFN of this sub-function module performed, determines and needs weight
Rebuilding, the data of parsing are loaded into that to return to client in corresponding list clear during web page contents by the web page contents built
Look at device.
The most according to claim 1 realizing the method that terminal maintenance and information are issued based on embedded Linux, its feature exists
In: in step 5, the process of file system interaction module comprises the steps:
A, file interaction module perform different subfunction according to application level function code AFN difference: log file download, application journey
The renewal of preface part, the renewal of cgi script file, driver update, user-defined file download, user-defined file are uploaded, but whole
Mainly include two parts from the point of view of body: uploading and downloading of file, if files passe, then go to step b, if file download, then
Go to step c；
B, first form data after decoding obtain this condition code and the catalogue of upper transmitting file and filename, it is determined that
The end of condition code and the beginning of file data, then according to different subfunctions under corresponding catalogue newly-built corresponding interim
File, is written to the file data read from standard input port in newly-built temporary file, data write after by original text
Part is deleted, and temporary file name is modified as the filename of original, goes wrong then by temporary file during files passe
Delete and return, to client browser, the prompting that files passe is failed；
C, first form data after decoding obtain the place catalogue of file and filename needing to download, then arrives finger
Determine find corresponding file under catalogue and by standard output port, file content is sent to client browser.
The most according to claim 1 realizing the method that terminal maintenance and information are issued based on embedded Linux, its feature exists
In: in step 5, bottom layer driving interactive module performs different subfunctions according to application level function code AFN difference: to bottom hardware
The inquiry of depositor, configuration and the Applied layer interface function providing each bsp driver are tested.
The most according to claim 1 realizing the method that terminal maintenance and information are issued based on embedded Linux, its feature exists
In: in step 5, the process of debugging interface module is as follows: firstly the need of the target after being compiled by each multi-threaded program to be debugged
Files passe is under acquisition terminal particular category, and then to notify that application process stops by interprocess communication mode to be debugged for CGI
The operation of thread, CGI process is initiated a subprocess and the operation code of subprocess is replaced to thread code to be debugged, making
Thread runs as a subprocess of CGI process, and is delivered to by standard output oral instructions by the Debugging message in running
Client shows, by the analysis of Debugging message judges the problem source of this thread in client.
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