CN112565031A - Parameter configuration method and terminal for PPP connection - Google Patents
Parameter configuration method and terminal for PPP connection Download PDFInfo
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- CN112565031A CN112565031A CN202011377372.8A CN202011377372A CN112565031A CN 112565031 A CN112565031 A CN 112565031A CN 202011377372 A CN202011377372 A CN 202011377372A CN 112565031 A CN112565031 A CN 112565031A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2858—Access network architectures
- H04L12/2859—Point-to-point connection between the data network and the subscribers
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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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
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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
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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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
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a parameter configuration method and a terminal of PPP connection; the method comprises the steps of receiving a preset application request, and packaging information in the preset application request into first information; analyzing the content in the first information to obtain a command type, judging whether the command type is stop, if so, executing step S3, and if so, executing step S4; stopping a PPPD daemon; analyzing parameters and parameter values in the first information, matching the parameters and parameter values with contents in a preset parameter configuration file, and operating the PPPD according to a matching result; the invention can flexibly configure and expand PPP parameters by presetting the application request and the parameter configuration file, can be suitable for various PPP connection scenes, supports host and device ends, can also support various PPPD connections, is not limited to the existing dial-up networking, such as supporting USB data transmission of two devices adopting PPPD.
Description
Technical Field
The present invention relates to the field of mobile communication technologies, and in particular, to a method and a terminal for configuring parameters of PPP connection.
Background
PPP (Point to Point Protocol) provides a standard method for transmitting multi-Protocol packets over a Point-to-Point connection. PPP is located at the data link layer and is a link layer protocol designed for simple links for transmitting packets between peer units, which provide full duplex operation and deliver packets in sequence.
The PPP protocol is represented in the kernel as a PPP protocol processing module. The PPP protocol is arranged below the physical layer such as the Ethernet and the serial port, and the network layer such as the IP protocol is arranged above the physical layer.
When data is sent, the TCP/IP data packet is packaged by PPP and then sent by a serial port.
When receiving data, the data from the serial port is unpacked by PPP and then reported to the TCP/IP protocol layer.
The network protocol is realized in a layered mode, an upper layer generally only needs to know a direct lower layer, and an interface of an indirect lower layer is used only under the condition of extremely little data. For example, applications such as multimedia messages, browsers, and mail are programmed using socket interfaces, which only need to know the TCP/IP protocol, but not the PPP protocol. This hierarchical design simplifies the implementation of the protocol and the development of the application.
PPPD (Point to Point Protocol daemon) is a background service process, a process in user space, that processes strategic content. The PPPD realizes the control protocols of all the extended functions of authentication, compression/decompression, encryption/decryption and the like.
The most traditional communication mode between kernel space and user space is adopted between PPP protocol processing modules in the PPPD and the kernel: a device file. The device filename is/dev/PPP.
Through read system call, the PPPD can read the data packet of the PPP protocol processing module, and of course, the PPP protocol processing module will only send the data packet that should be processed by the PPPD to the PPPD.
Through the write system call, the PPPD can transfer the data packet to be sent to the PPP protocol processing module.
Through an ioctl system (input/output control, system call dedicated to device input/output operation) call, the PPPD can set parameters of the PPP protocol, and can establish/close a connection.
The PPP configuration technique of the existing modem module is as follows:
1. create a modem dialing script for the PPP program:
the script mainly configures AT commands, the commands are transmitted to the modem end, and the modem end converts the AT commands into signaling and mobile wireless network interaction after receiving the AT commands.
2. Create PPP on and PPP off scripts:
the PPP on script mainly executes the PPPD executable file, issues related PPPD parameters and calls a modem dialing script. The PPP off script is primarily used for PPP disconnection operations.
3. The operation method comprises the following steps:
(1) executing dial-up connection;
(2) dial-off is performed.
The existing PPP connection configuration technology has the following disadvantages:
1. and (5) parameter configuration is rigid. The existing PPP connection generally executes PPPD through a script, once the script is fixed, PPP parameters cannot be added or deleted later, and only the PPP parameters can be updated through ota.
2. The mode is single. The script can only be suitable for one mode, for example, the script can only be suitable for PPP dialing of a certain 3G/4G module, and the script cannot be universal and is suitable for various PPP dialing connections.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided are a parameter configuration method and a terminal for PPP connection, which can flexibly configure extended PPP parameters and have universality.
In order to solve the technical problems, the invention adopts the technical scheme that:
a method for configuring parameters of PPP connection includes:
s1, receiving a preset application request, and packaging information in the preset application request into first information;
s2, analyzing the content in the first information to obtain a command type, judging whether the command type is stop, if so, executing a step S3, and if the command type is start, executing a step S4;
s3, stopping PPPD;
s4, analyzing the parameters and parameter values in the first information, matching the parameters and parameter values with the contents in a preset parameter configuration file, and operating the PPPD according to the matching result.
A parameter configuration terminal for PPP connection, comprising a processor, a memory and a computer program stored on the memory and operable on the processor, the processor implementing the following steps when executing the computer program:
s1, receiving a preset application request, and packaging information in the preset application request into first information;
s2, analyzing the content in the first information to obtain a command type, judging whether the command type is stop, if so, executing a step S3, and if the command type is start, executing a step S4;
s3, stopping PPPD;
s4, analyzing the parameters and parameter values in the first information, matching the parameters and parameter values with the contents in a preset parameter configuration file, and operating the PPPD according to the matching result.
The invention has the beneficial effects that: the invention provides a parameter configuration method and a terminal of PPP connection, which are characterized in that parameters and parameter values required by configuration are requested in a preset application, the parameters and the parameter values are matched with a preset parameter configuration file, and the PPPD is operated according to a matching result; the invention can flexibly configure and expand PPP parameters by presetting an application request and a parameter configuration file, can be suitable for various PPP connection scenes, supports host and device terminals, can also support various PPPD connections, is not limited to the existing dial-up networking, such as supporting USB data transmission of two devices adopting PPPD.
Drawings
Fig. 1 is a flowchart of a method for configuring parameters of a PPP connection according to an embodiment of the invention;
fig. 2 is a structural diagram of a parameter configuration terminal of PPP connection according to an embodiment of the present invention;
fig. 3 is a detailed flowchart of a method for configuring parameters of PPP connection according to an embodiment of the invention;
description of reference numerals:
1. a PPP connection parameter configuration terminal; 2. a processor; 3. a memory.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 and fig. 3, a method for configuring parameters of PPP connection includes:
s1, receiving a preset application request, and packaging information in the preset application request into first information;
s2, analyzing the content in the first information to obtain a command type, judging whether the command type is stop, if so, executing a step S3, and if the command type is start, executing a step S4;
s3, stopping PPPD;
s4, analyzing the parameters and parameter values in the first information, matching the parameters and parameter values with the contents in a preset parameter configuration file, and operating the PPPD according to the matching result.
From the above description, the beneficial effects of the present invention are: the invention provides a parameter configuration method and a terminal of PPP connection, which are characterized in that parameters and parameter values required by configuration are requested in a preset application, the parameters and the parameter values are matched with a preset parameter configuration file, and the PPPD is operated according to a matching result; the invention can flexibly configure and expand PPP parameters by presetting an application request and a parameter configuration file, can be suitable for various PPP connection scenes, supports host and device terminals, can also support various PPPD connections, is not limited to the existing dial-up networking, such as supporting USB data transmission of two devices adopting PPPD.
Further, step S4 is specifically:
s41, analyzing the parameters and parameter values in the first information, and matching the parameters and parameter values with the contents in a preset parameter configuration file;
s42, when the parameters and the parameter values are successfully matched with the contents in the preset parameter configuration file, reading option values corresponding to the parameters and the parameter values in the preset parameter configuration file, splicing the parameters, the parameter values and the option values into a PPP character string execution instruction, operating the PPPD, and returning an operation result;
and S43, when the parameter and the parameter value fail to be matched with the content in the preset parameter configuration file, returning the error information which is not supported.
According to the description, when the parameter and the parameter value are successfully matched with the content in the preset parameter configuration file, the further operation is carried out, otherwise, the unsupported information is returned, the validity of the parameter can be accurately checked, and tampering and malicious codes are prevented.
Further, the step S41 of matching the parameters and the parameter values with the content in the preset parameter configuration file specifically includes:
if the parameter value is a character string, matching the parameter with a preset parameter of the character string type in the parameter configuration file;
and if the parameter value is of the pool type, matching the parameter and the parameter value with a preset parameter and a preset parameter value of the pool type in a parameter configuration file.
According to the invention, different matching modes are carried out according to different parameter types, so that the accuracy of parameter matching is improved.
Further, step S4 is followed by:
and S5, maintaining the PPP connection state and returning state change information.
It can be known from the above description that the present invention also maintains the PPP connection state, and returns the connection state change information to the upper layer in time, which is beneficial for the user to learn the PPP connection state.
Further, a Java interface layer and a first daemon process are newly added, the content of the Java interface layer is obtained in step S1, and the content of the first daemon process is obtained in steps after S2 and S2;
the communication between the Java interface layer and the first daemon process is performed through socket information, that is, the first information in step S1 is socket information encapsulated by socket.
As can be seen from the above description, the communication of the socket information is performed between the Java interface layer and the first daemon process through the socket, so that the security of information interaction is improved.
Referring to fig. 2, a parameter configuration terminal for PPP connection includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the processor executes the computer program to implement the following steps:
s1, receiving a preset application request, and packaging information in the preset application request into first information;
s2, analyzing the content in the first information to obtain a command type, judging whether the command type is stop, if so, executing a step S3, and if the command type is start, executing a step S4;
s3, stopping PPPD;
s4, analyzing the parameters and parameter values in the first information, matching the parameters and parameter values with the contents in a preset parameter configuration file, and operating the PPPD according to the matching result.
From the above description, the beneficial effects of the present invention are: the invention provides a parameter configuration method and a terminal of PPP connection, which are characterized in that parameters and parameter values required by configuration are requested in a preset application, the parameters and the parameter values are matched with a preset parameter configuration file, and the PPPD is operated according to a matching result; the invention can flexibly configure and expand PPP parameters by presetting an application request and a parameter configuration file, can be suitable for various PPP connection scenes, supports host and device terminals, can also support various PPPD connections, is not limited to the existing dial-up networking, such as supporting USB data transmission of two devices adopting PPPD.
Further, step S4 is specifically:
s41, analyzing the parameters and parameter values in the first information, and matching the parameters and parameter values with the contents in a preset parameter configuration file;
s42, when the parameters and the parameter values are successfully matched with the contents in the preset parameter configuration file, reading option values corresponding to the parameters and the parameter values in the preset parameter configuration file, splicing the parameters, the parameter values and the option values into a PPP character string execution instruction, operating the PPPD, and returning an operation result;
and S43, when the parameter and the parameter value fail to be matched with the content in the preset parameter configuration file, returning the error information which is not supported.
According to the description, when the parameter and the parameter value are successfully matched with the content in the preset parameter configuration file, the further operation is carried out, otherwise, the unsupported information is returned, the validity of the parameter can be accurately checked, and tampering and malicious codes are prevented.
Further, the step S41 of matching the parameters and the parameter values with the content in the preset parameter configuration file specifically includes:
if the parameter value is a character string, matching the parameter with a preset parameter of the character string type in the parameter configuration file;
and if the parameter value is of the pool type, matching the parameter and the parameter value with a preset parameter and a preset parameter value of the pool type in a parameter configuration file.
According to the invention, different matching modes are carried out according to different parameter types, so that the accuracy of parameter matching is improved.
Further, the processor executes the computer program after step S4 and includes:
and S5, maintaining the PPP connection state and returning state change information.
It can be known from the above description that the present invention also maintains the PPP connection state, and returns the connection state change information to the upper layer in time, which is beneficial for the user to learn the PPP connection state.
Further, when the processor executes the computer program, a Java interface layer and a first daemon process are added, the content of the Java interface layer is obtained in step S1, and the content of the first daemon process is obtained in steps after S2 and S2;
the communication between the Java interface layer and the first daemon process is performed through socket information, that is, the first information in step S1 is socket information encapsulated by socket.
As can be seen from the above description, the communication of the socket information is performed between the Java interface layer and the first daemon process through the socket, so that the security of information interaction is improved.
Referring to fig. 1 and fig. 3, a first embodiment of the present invention is:
a method for configuring parameters of PPP connection includes:
s1, receiving a preset application request, and packaging information in the preset application request into first information;
s2, analyzing the content in the first information to obtain a command type, judging whether the command type is stop, if so, executing a step S3, and if the command type is start, executing a step S4;
in this embodiment, compared to the prior art, a Java interface layer and a first daemon process are added, step S1 is the content of the Java interface layer, and steps after step S2 and step S2 are the content of the first daemon process;
the communication between the Java interface layer and the first daemon process is performed through socket information, that is, the first information in step S1 is socket information encapsulated by socket;
in this embodiment, the APK sends a request including a start command, a stop command, and a configuration parameter through a PPPD API interface of the Java interface layer. The Java interface layer is used for providing an interface for APK calling, encapsulating socket information and transmitting pppd _ service to the information through the socket; and then receiving a processing result and connection state information returned by the pppd _ service through the socket, and returning the processing result and the connection state information to the APK application, wherein the pppd _ service is a first daemon process.
The socket information format is Header + Message + check bit + End, and the following specific steps are performed:
a Header: start bit 0 xFF;
the Message format is ab cdef cdef cdef, wherein a is 4 bytes and represents the command type, 1 represents start PPPD after the command type is converted into the integer, and 0 represents stop PPPD; b is 4 bytes, which indicates the total length of the subsequent data frame, i.e. the total byte length of b + c + d + e + f, c is 4 bytes, which indicates the length of key, the subsequent bytes are read as the length of key after being converted into integer, the length of d is specified by b, which is the content of key, the key is the PPP parameter key to be supported, e is 4 bytes, which indicates the length of value, the subsequent bytes are read as the length of value after being converted into integer, the length of f is specified by d, which is the content of value, and the value is the character string or the bool value of PPP parameter;
and (3) check bit algorithm: the calculation method adopts XOR sum, namely XOR calculation is carried out on data one by one;
end: end bit 0 xFF.
S3, stopping PPPD;
s4, analyzing the parameters and parameter values in the first information, matching the parameters and parameter values with the contents in a preset parameter configuration file, and operating the PPPD according to the matching result;
wherein, step S4 specifically includes:
s41, analyzing the parameters and parameter values in the first information, and matching the parameters and parameter values with the contents in a preset parameter configuration file;
s42, when the parameters and the parameter values are successfully matched with the contents in the preset parameter configuration file, reading option values corresponding to the parameters and the parameter values in the preset parameter configuration file, splicing the parameters, the parameter values and the option values into a PPP character string execution instruction, operating the PPPD, and returning an operation result;
s43, when the parameter and the parameter value fail to match with the content in the preset parameter configuration file, returning the error information which is not supported;
in step S41, the specific step of matching the parameters and parameter values with the content in the preset parameter configuration file is:
if the parameter value is a character string, matching the parameter with a preset parameter of the character string type in the parameter configuration file;
if the parameter value is a pool type, matching the parameter and the parameter value with a preset parameter and a preset parameter value of the pool type in a parameter configuration file;
and S5, maintaining the PPP connection state and returning state change information.
In this embodiment, the newly added daemon PPPD _ service is responsible for executing start and stop of the PPPD process, and the process is as follows:
receiving fixed format socket information packaged by a Java interface layer, analyzing the socket information to obtain a command type cmdtype; if the analysis process is wrong, error information is directly returned to the Java interface layer through the socket. (3) If the cmdtype is stop, directly performing stop pppd operation;
if cmdtype is start, the following keys and values, i.e., parameters and parameter values, continue to be explained. If the value of the key is a character string, comparing the key with the key supported by the StringType in the xml parameter configuration file, and if the key is inquired, indicating that the key is supported; if the query is not successful, the option value option corresponding to the key is considered not to be supported by the current software, and the method can also prevent malicious key from being issued.
Such as: the socket message analyzes that key is device _ name; value ═ dev/ttyGS0
And then inquiring whether the xml parameter configuration file contains item with the key being device _ name, if yes, indicating support, and if not, supporting. The format of the key of device _ name supported is as follows.
<StringType key＝"device_name"/>
If the value of the key is pool (0 or 1), comparing the key/value with the key and value supported by BoolType in xml, if the key/value is inquired, indicating that the key is supported, and then acquiring the corresponding option value; if the query is not successful, the option corresponding to the key is not supported by the current software, and the method can also prevent the malicious key from issuing.
Such as: the socket message analyzes out key as default _ route; value is 0
Then inquiring whether the xml parameter configuration file contains key default rout or not; if yes, the item option is read for configuring the PPPD parameter; not supported.
The supported formats are as follows. The option is obtained as nodefaultroute.
<BoolType key＝"default_route"value＝"0"option＝"nodefaultroute"/>
And splicing the parsed string and option into a PPP character string execution instruction, and returning a result to a Java interface layer through a socket when the execution success or the execution error of the PPPD operation is performed.
In addition, it is necessary to maintain various status changes of PPP connection, such as init, connecting, connected, disconnected, and notify the upper layer when the status changes.
The xml parameter configuration file format is referenced as follows:
wherein the pool type contains the key name, the value corresponding to the key, and the options value of the mapping.
Such as "default _ route" value ═ 1"option ═ default"/>, for example, boolType key ═ default _ route "value ═ 1" option
That is, when the upper layer transfer key is default _ route and has a value of 1, the PPPD _ service sets the option value option obtained by xml as default, and finally transfers the default parameter to the PPPD.
The string type contains only the key name.
Such as < StringType key ═ device _ name'/>
The pppd _ service detects the correctness and validity of the incoming parameters by the key name and value in the xml parameter configuration file.
Referring to fig. 2, the second embodiment of the present invention is:
a parameter configuration terminal 1 for PPP connection, comprising a processor 2, a memory 3 and a computer program stored on the memory 3 and operable on the processor 2, wherein the processor 2 implements the steps of the first embodiment when executing the computer program.
In summary, the present invention provides a method and a terminal for parameter configuration of PPP connection, which configure parameters and parameter values required by a preset application request, match the parameters and parameter values with a preset parameter configuration file, and operate the PPPD according to the matching result; the invention can flexibly configure and expand PPP parameters by presetting an application request and a parameter configuration file, can be suitable for various PPP connection scenes, supports host and device terminals, can also support various PPPD connections, is not limited to the existing dial-up networking, such as supporting USB data transmission of two devices adopting PPPD. And the Java interface layer and the first daemon process adopt socket message communication, thereby improving the safety of messages.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for configuring parameters of a PPP connection, comprising:
s1, receiving a preset application request, and packaging information in the preset application request into first information;
s2, analyzing the content in the first information to obtain a command type, judging whether the command type is stop, if so, executing a step S3, and if the command type is start, executing a step S4;
s3, stopping PPPD;
s4, analyzing the parameters and parameter values in the first information, matching the parameters and parameter values with the contents in a preset parameter configuration file, and operating the PPPD according to the matching result.
2. The method for configuring parameters of PPP connection as recited in claim 1, wherein step S4 specifically comprises:
s41, analyzing the parameters and parameter values in the first information, and matching the parameters and parameter values with the contents in a preset parameter configuration file;
s42, when the parameters and the parameter values are successfully matched with the contents in the preset parameter configuration file, reading option values corresponding to the parameters and the parameter values in the preset parameter configuration file, splicing the parameters, the parameter values and the option values into a PPP character string execution instruction, operating the PPPD, and returning an operation result;
and S43, when the parameter and the parameter value fail to be matched with the content in the preset parameter configuration file, returning the error information which is not supported.
3. The method as claimed in claim 1, wherein the step S41 of matching the parameters and parameter values with the contents of the preset parameter configuration file specifically comprises:
if the parameter value is a character string, matching the parameter with a preset parameter of the character string type in the parameter configuration file;
and if the parameter value is of the pool type, matching the parameter and the parameter value with a preset parameter and a preset parameter value of the pool type in a parameter configuration file.
4. The method for configuring parameters of PPP connection as in claim 1, further comprising after step S4:
and S5, maintaining the PPP connection state and returning state change information.
5. The method of claim 1, 2, 3 or 4, wherein a Java interface layer and a first daemon process are added, the content of the Java interface layer is obtained in step S1, and the content of the first daemon process is obtained in steps after S2 and S2;
the communication between the Java interface layer and the first daemon process is performed through socket information, that is, the first information in step S1 is socket information encapsulated by socket.
6. A parameter configuration terminal for PPP connection, comprising a processor, a memory and a computer program stored on the memory and operable on the processor, wherein the processor executes the computer program to implement the following steps:
s1, receiving a preset application request, and packaging information in the preset application request into first information;
s2, analyzing the content in the first information to obtain a command type, judging whether the command type is stop, if so, executing a step S3, and if the command type is start, executing a step S4;
s3, stopping PPPD;
s4, analyzing the parameters and parameter values in the first information, matching the parameters and parameter values with the contents in a preset parameter configuration file, and operating the PPPD according to the matching result.
7. The terminal for configuring parameters of PPP connection according to claim 6, wherein the step S4 specifically comprises:
s41, analyzing the parameters and parameter values in the first information, and matching the parameters and parameter values with the contents in a preset parameter configuration file;
s42, when the parameters and the parameter values are successfully matched with the contents in the preset parameter configuration file, reading option values corresponding to the parameters and the parameter values in the preset parameter configuration file, splicing the parameters, the parameter values and the option values into a PPP character string execution instruction, operating the PPPD, and returning an operation result;
and S43, when the parameter and the parameter value fail to be matched with the content in the preset parameter configuration file, returning the error information which is not supported.
8. The terminal of claim 6, wherein the matching of the parameters and parameter values with the contents of the preset parameter configuration file in step S41 specifically comprises:
if the parameter value is a character string, matching the parameter with a preset parameter of the character string type in the parameter configuration file;
and if the parameter value is of the pool type, matching the parameter and the parameter value with a preset parameter and a preset parameter value of the pool type in a parameter configuration file.
9. The terminal of claim 6, wherein the processor executes the computer program after step S4 and further comprises:
and S5, maintaining the PPP connection state and returning state change information.
10. A parameter configuration terminal for PPP connection as recited in claim 6, 7, 8 or 9, wherein said processor adds a Java interface layer and a first daemon process when executing said computer program, wherein the content of said Java interface layer is obtained in step S1, and the content of the first daemon process is obtained in steps after S2 and S2;
the communication between the Java interface layer and the first daemon process is performed through socket information, that is, the first information in step S1 is socket information encapsulated by socket.
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