CN103685477A - GPRS (general packet radio service) module with FTP (file transfer protocol) function and FTP method implemented by GPRS module - Google Patents
GPRS (general packet radio service) module with FTP (file transfer protocol) function and FTP method implemented by GPRS module Download PDFInfo
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Abstract
The invention discloses a GPRS (general package radio service) module with an FTP (file transfer protocol) function and an FTP method implemented by the GPRS module. The GPRS module comprises an intelligent terminal communication unit, an AT (attention) command response unit and an FTP communication unit; the intelligent terminal communication unit is used for being communicated and connected with an intelligent terminal; the AT command response unit is used for receiving AT commands issued by the intelligent terminal and interpreting the received AT commands to obtain FTP control instructions; the FTP communication unit can be connected with an FTP file server and can execute file operation according to the FTP control instructions. The GPRS module and the FTP method have the advantages that the intelligent terminal can control the GPRS module via corresponding interfaces, and the GPRS module can be connected with the FTP file server, so that the FTP function can be realized.
Description
Technical field
The invention belongs to communication technical field, be specifically related to there is the GPRS module of FTP transfer function and realizing FTP(file transfer protocol (FTP)) method of transmission.
Background technology
Along with the development of wireless communication technology and the extensive use of GSM/GPRS, grouping service wireless GPRS communication is more and more extensive in the application of intelligent terminal.In GPRS communications applications, intelligent terminal need adopt ICP/IP protocol stack, and need to use FTP function to complete the file transmitting functions such as data, parameter and upgrading, shown in Fig. 1.
Yet, as shown in Figure 2, existing GPRS module can only realize the transfer of data of bottom conventionally, FTP function is realized by intelligent terminal, and realize comparatively complexity, the soft and hardware of intelligent terminal is had relatively high expectations, therefore cause the product cost of intelligent terminal higher, and to developer, bring very large development difficulty, be difficult in main intelligent terminal, apply take Single Chip Microcomputer (SCM) system.
Summary of the invention
The invention provides a kind of GPRS module and ftp file transmission method thereof of the FTP of having transfer function, make intelligent terminal to control GPRS module by the corresponding interface, by GPRS module, connect ftp file server and realize FTP transfer function.Object of the present invention is realized by following technical scheme:
A GPRS module with FTP transfer function, for responding the order of intelligent terminal and connecting with ftp file server; It is characterized in that, this GPRS module comprises: intelligent terminal communication unit, for communicating to connect with intelligent terminal; AT command response unit, the AT order issuing for receiving intelligent terminal, and the AT order of reception is read as to FTP transmission control command; FTP communication unit, according to described FTP transmission control command, is connected with ftp file server and execute file operation.
Based on an above-mentioned ftp file transmission method with the GPRS module of FTP transfer function, it is characterized in that, the method comprises:
(1) the GPRS network parameter of initialization GPRS module, then carries out PDP activation, sets up GPRS network link;
(2) the AT order of the startup file transmission service that reception intelligent terminal in AT command response unit issues, and control FTP communication unit and chain and set up a TCP connection that is connected to ftp file server command port in described GPRS network;
(3) by described TCP, connected and sent FTP logon information, after FTP logon information is verified, GPRS module is returned to announcement information to intelligent terminal by intelligent terminal communication unit;
(4) AT command response unit receives the AT order to file operation that intelligent terminal issues, and controls FTP communication unit and in described GPRS network, chains the TCP connection that establishes a connection to ftp file server data port, and carry out every file operation;
(5) the AT order of the close file transmission service that reception intelligent terminal in AT command response unit issues, and control FTP communication unit and close described TCP connection.
As concrete technical scheme, in step (2), when the AT command response unit of GPRS module receives the AT order of the startup file transmission service that intelligent terminal issues, first to ordering subsidiary ftp file server address, the user name of game server and password carry out parameter testing and parsing, if parameter error, returns to announcement information to intelligent terminal.
As concrete technical scheme, in step (2), FTP communication unit chains and sets up a TCP connection that is connected to ftp file server command port in described GPRS network, be specially: first GPRS module is set up one and controlled socket, by this control socket, is connected with ftp file server.
As concrete technical scheme, described control socket is connected by domain name and connects with ftp file server, first carries out domain name mapping, then connect ftp file server during connection.
As concrete technical scheme, in step (4), the described AT order to file operation comprises file download command, described AT command response unit receives file download command, by input parameter, check, to controlling socket transmission " PASV " order, enter into Passive Mode, ftp file server returns to IP address and FPDP, and described FTP communication unit creates a data socket and connects this IP address and FPDP; After successful connection, to controlling socket, send for locating " REST initial address " order of download file initial address, then send " RETR " command download file; Afterwards, ftp file server sends data to data socket, and FTP communication unit, when receiving the data that need, sends " ABOR " order to controlling socket, ends ftp file server data and sends.
As concrete technical scheme, in step (4), the described AT order to file operation also comprises file upload command, described AT command response unit receives after file upload command, described control socket sends " PASV " order, enter into Passive Mode, send afterwards " STOR filename " order, after ftp file server normally returns, described FTP communication unit enters into data transfer phase, and the designated length data that described FTP communication unit receives described intelligent terminal communication unit upload to ftp file server by described data socket.
As concrete technical scheme, in step (4), the described AT order to file operation also comprises the order of ftp file acquiring size, creaties directory, deltrees and print current directory order.
As concrete technical scheme, in step (5), while closing described TCP connection, whether first inquiry has data to connect exists, if there are data to connect, first close data connection, then closing control order connects; Empty simultaneously and discharge transceiving data buffer memory.
Patent of the present invention is by embedded FTP function in GPRS module, intelligent terminal only need to pass through serial communication interface, use expansion AT command, by the serial communication interface of GPRS module, control GPRS module and just can carry out FTP operation, realize remote file transferring, thereby reduce the soft and hardware requirement to intelligent terminal, effectively reduced the product cost of intelligent terminal, easy to use, strong operability.
Accompanying drawing explanation
Fig. 1 is that intelligent terminal passes through the system schematic that GPRS module connects ftp file server.
Fig. 2 is that existing intelligent terminal is realized the schematic diagram of ftp file transfer function by GPRS module.
Fig. 3 realizes the schematic diagram of ftp file transfer function for the intelligent terminal that the embodiment of the present invention provides by GPRS module.
The formation block diagram of the GPRS module that Fig. 4 provides for the embodiment of the present invention.
The FTP attended operation flow chart of the ftp file transmission method that Fig. 5 provides for the embodiment of the present invention.
In the ftp file transmission method that Fig. 6 provides for the embodiment of the present invention, open the flow chart of FTP function.
The flow chart that in the ftp file transmission method that Fig. 7 provides for the embodiment of the present invention, under Passive Mode, file is downloaded.
The flow chart that in the ftp file transmission method that Fig. 8 provides for the embodiment of the present invention, under Passive Mode, file is uploaded.
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
Shown in Fig. 3, the GPRS module that the present embodiment provides is for coordinating with intelligent terminal and ftp file server, by embedded FTP function in this GPRS module, and connect ftp file server under the AT of intelligent terminal order is controlled, thereby realize the file operations such as file is uploaded, download.
As shown in Figure 4, the GPRS module that the present embodiment provides comprises intelligent terminal communication unit, AT command response unit and FTP communication unit.Wherein, intelligent terminal communication unit is realized by serial communication interface and the corresponding signal procedure of GPRS module, for communicating to connect with intelligent terminal.AT command response unit is used for receiving the AT order that intelligent terminal issues, and the AT order of reception is read as to FTP transmission control command.FTP communication unit, is to increase FTP communication protocol on the existing ICP/IP protocol stack of GPRS module basis, according to described FTP transmission control command, is connected and execute file operation with ftp file server.
Shown in following table, the AT order of communicating by letter between GPRS module and intelligent terminal in the present embodiment comprises: startup file transmission service order #FTPCONNECT, close file transmission service order #FTPDISCONNECT, obtain listed files order #FTPDIR, change work at present directory command #FTPCD, delete assigned catalogue path command #FTPRMD, create new directory order #FTPMKD, print work at present directory command #FTPPWD, obtain the order of ftp file size #FTPSIZE, file upload command #FTPSEND, file download command #FTPRECV.
| Sequence number | Order | Function |
| 1 | #FTPCONNECT | The order of startup file transmission service |
| 2 | #FTPDISCONNECT | The order of close file transmission service |
| 3 | #FTPDIR | Obtain listed files order |
| 4 | #FTPCD | Change work at present directory command |
| 5 | #FTPRMD | Delete assigned catalogue path command |
| 6 | #FTPMKD | Create new directory order |
| 7 | #FTPPWD | Print work at present directory command |
| 8 | #FTPSIZE | Obtain the order of ftp file size |
| 9 | #FTPSEND | File upload command |
| 10 | #FTPRECV | File download command |
Shown in Fig. 5, based on the above-mentioned ftp file transmission method with the GPRS module of FTP transfer function, it comprises:
(1) the GPRS network parameter of initialization GPRS module, as APN, username and password etc., then carry out PDP activation, set up GPRS network link;
(2) the AT order of the startup file transmission service that reception intelligent terminal in AT command response unit issues, and control FTP communication unit and chain and set up a TCP connection that is connected to ftp file server command port in described GPRS network;
(3) by described TCP, connected and sent FTP logon information, after FTP logon information is verified, GPRS module is returned to announcement information to intelligent terminal by intelligent terminal communication unit;
(4) the AT order of the file operation that reception intelligent terminal in AT command response unit issues, controls FTP communication unit and in described GPRS network, chains the TCP connection that establishes a connection to ftp file server data port, and carry out every file operation;
(5) the AT order of the close file transmission service that reception intelligent terminal in AT command response unit issues, and control FTP communication unit and close described TCP connection.
Wherein, above-mentioned steps (2) and step (3) relate to the startup of FTP function, and its concrete implementation procedure is described as follows:
Shown in Fig. 6, the AT command response unit of GPRS module receives the #FTPCONNECT order that intelligent terminal issues, and (order is accompanied with relevant parameter, include ftp file server address, the user name of game server and password etc.), carry out parameter testing and parsing, if parameter input error, will return to ERROR and error code, as correctly entered FTP landfall process.FTP landfall process is: first the FTP communication unit of GPRS module is set up and controlled being connected of socket with ftp file server, if use domain name, need carry out after domain name mapping, then connect ftp file server; After successful connection, need send user name to controlling socket, after correctly returning, then send password, if password passes through, illustrate that GPRS module has logged on ftp file server.
Above-mentioned steps (4) relates to the concrete file operation after logging in, and to FTP, sends other control command, and ftp file server will be done respective acknowledgement.The AT order and the implementation procedure that wherein relate to are described as follows:
Obtaining ftp file size AT order #FTPSIZE, is mainly whether inquiry this document exists and file size.When file does not exist, GPRS module can return an error to intelligent terminal; If file exists, can use a part in the whole file of #FTPRECV command download or file according to demand.After normally logging in ftp file server, to controlling socket, send order " SIZE filename ", ftp file server can backspace file size.
File download command #FTPRECV is from ftp file server downloading files.Module is received the order of #FTPRECV download file, by input parameter, check, to controlling socket transmission " PASV " order, enter into Passive Mode, ftp file server returns to IP address and FPDP, and data socket of module creation goes to connect this IP address and FPDP; After successful connection, to controlling socket, send " REST initial address " order, for locating download file initial address, then send " RETR " command download file.Ftp file server can send data to data socket, and module, when receiving the data that need, sends " ABOR " order to controlling socket, ends ftp file server data and sends.Concrete download flow process as shown in Figure 7.
File upload command #FTPSEND completes local file and uploads to ftp file server.Module receives after file upload command, as download command, control socket and send " PASV " order, enter into Passive Mode, send afterwards " STOR filename " order, after ftp file server normally returns, module enters into data transfer phase, and module receives designated length data by serial ports and uploads onto the server by data socket, if the end mark of order is 1 o'clock, close data socket, and return to OK to terminal, under Passive Mode, idiographic flow as shown in Figure 8.When #FTPSEND order end mark is 0, represent that file need to repeatedly transmit, when a little, module can not closed data connection, but wait for next data upload, and only having can be to complete on whole file, and end mark position is 1 o'clock, module is just closed data socket, and upload file completes.
In addition, the order #FTPRMD that deltrees sends " RMD " order by controlling socket, the order #FTPMKD that creaties directory sends " MKD " order by controlling socket, print job directory command #FTPPWD sends " PWD " order by controlling socket, more than in order, can carry out filename and route inspection, after order normal response, can return to OK.
Module can normally exit FTP function after receiving and closing FTP command function #FTPDISCONNECT.First module can check that whether data socket is in connection status, if connection status, module sends " ABOR " order to controlling socket, end data socket, then to controlling socket, send " QUIT " order, to server application, exit FTP, module receives after the normal return information of server, controlling socket will close, and clears up simultaneously and discharges the shared memory headroom of FTP.
Patent of the present invention is by embedded FTP function in GPRS module, intelligent terminal only need to pass through serial communication interface, use expansion AT command to control GPRS module and just can carry out FTP operation, realize remote file transferring, thereby reduce the soft and hardware requirement to intelligent terminal, effectively reduced the product cost of intelligent terminal, easy to use, strong operability.。
Above embodiment is only fully openly the present invention, should not be considered to realize unique example of the present invention, and is that attainable other concrete examples should belong to the scope that the application discloses based on above-described embodiment without creative work.
Claims (9)
1. a GPRS module with FTP transfer function, for responding the order of intelligent terminal and connecting with ftp file server; It is characterized in that, this GPRS module comprises: intelligent terminal communication unit, for communicating to connect with intelligent terminal; AT command response unit, the AT order issuing for receiving intelligent terminal, and the AT order of reception is read as to FTP transmission control command; FTP communication unit, according to described FTP transmission control command, is connected with ftp file server and execute file operation.
2. the ftp file transmission method based on GPRS module claimed in claim 1, is characterized in that, the method comprises:
(1) the GPRS network parameter of initialization GPRS module, then carries out PDP activation, sets up GPRS network link;
(2) the AT order of the startup file transmission service that reception intelligent terminal in AT command response unit issues, and control FTP communication unit and chain and set up a TCP connection that is connected to ftp file server command port in described GPRS network;
(3) by described TCP, connected and sent FTP logon information, after FTP logon information is verified, GPRS module is returned to announcement information to intelligent terminal by intelligent terminal communication unit;
(4) AT command response unit receives the AT order to file operation that intelligent terminal issues, and controls FTP communication unit and in described GPRS network, chains the TCP connection that establishes a connection to ftp file server data port, and carry out every file operation;
(5) the AT order of the close file transmission service that reception intelligent terminal in AT command response unit issues, and control FTP communication unit and close described TCP connection.
3. ftp file transmission method according to claim 2, it is characterized in that, in step (2), when the AT command response unit of GPRS module receives the AT order of the startup file transmission service that intelligent terminal issues, first to ordering subsidiary ftp file server address, the user name of game server and password carry out parameter testing and parsing, if parameter error returns to announcement information to intelligent terminal.
4. ftp file transmission method according to claim 3, it is characterized in that, in step (2), FTP communication unit chains and sets up a TCP connection that is connected to ftp file server command port in described GPRS network, be specially: first GPRS module is set up one and controlled socket, by this control socket, is connected with ftp file server.
5. ftp file transmission method according to claim 4, is characterized in that, described control socket is connected by domain name and connects with ftp file server, first carries out domain name mapping, then connect ftp file server during connection.
6. ftp file transmission method according to claim 4, it is characterized in that, in step (4), the described AT order to file operation comprises file download command, described AT command response unit receives file download command, by input parameter, checks, to controlling socket transmission " PASV " order, enters into Passive Mode, ftp file server returns to IP address and FPDP, and described FTP communication unit creates a data socket and connects this IP address and FPDP; After successful connection, to controlling socket, send for locating " REST initial address " order of download file initial address, then send " RETR " command download file; Afterwards, ftp file server sends data to data socket, and FTP communication unit, when receiving the data that need, sends " ABOR " order to controlling socket, ends ftp file server data and sends.
7. ftp file transmission method according to claim 6, it is characterized in that, in step (4), the described AT order to file operation also comprises file upload command, described AT command response unit receives after file upload command, described control socket sends " PASV " order, enter into Passive Mode, send afterwards " STOR filename " order, after ftp file server normally returns, described FTP communication unit enters into data transfer phase, the designated length data that described FTP communication unit receives described intelligent terminal communication unit upload to ftp file server by described data socket.
8. ftp file transmission method according to claim 7, is characterized in that, in step (4), the described AT order to file operation also comprises the order of ftp file acquiring size, creaties directory, deltrees and print current directory order.
9. ftp file transmission method according to claim 2, is characterized in that, in step (5), while closing described TCP connection, whether first inquiry has data to connect exists, if there are data to connect, first close data connection, then closing control order connects.
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