CN101931663B - Method capable of dynamically setting domain name server and wireless communication terminal - Google Patents

Abstract

The present invention provides a method and a wireless communication device capable of dynamically setting a domain name server. When the wireless communication terminal is powered on, the primary DNS cache variable, the secondary DNS cache variable and the setting state variable are initialized; when the dial-up connection process is initiated, the dial-up connection is detected If the dialing parameter information includes the primary DNS address and the secondary DNS address, record the DNS address and set the state variable; detect and set the state variable, if the state variable is set, then the wireless communication terminal and the user equipment will During the DHCP or IPCP negotiation process, return the cached primary DNS address and secondary DNS address to the user equipment; if the setting state variable is not set, return the DNS address assigned by the network to the user equipment. Compared with the prior art, the user can set the specified DNS address through the interface when performing data service through the wireless data card.

Description

Method and wireless communication terminal capable of dynamically setting domain name server

technical field

The invention relates to the technical field of communication, in particular to a method for dynamically setting a domain name server and a mobile communication terminal.

Background technique

With the wide application and gradual popularization of mobile wireless communication technology in the world, wireless communication terminal products (mobile phones, data cards with various interfaces, netbooks, built-in communication modules, routers, etc.) Groceries (or even must-haves). The competition among various manufacturers in the market is also becoming increasingly fierce. How to better increase product functions, improve product performance, continuously meet user needs, and make terminal products have a better user experience has become a hot issue that major manufacturers pay attention to.

Existing wireless communication terminal products first need to initiate a dial-up process to establish a data connection with the network before performing data services. After the dial-up connection is successfully established, the core network specifies the DNS server address, and the user uses the DNS address for domain name resolution. This method of uniformly assigning DNS addresses by the network, when there are a large number of DNS service demands at the same time, the DNS server designated by the network will be blocked, thereby delaying the speed of users browsing the web; in more extreme cases, if the network designated If the DNS server fails and cannot provide domain name resolution services, it will directly cause users to be unable to browse the web normally. At the same time, in practical applications, users also hope to use a designated DNS server for domain name resolution, instead of using a single DNS address allocated by the network. Therefore, if a way can be provided to allow users to flexibly select DNS addresses, the problem of uniform distribution of DNS addresses by the network can be solved, while meeting user needs and improving user experience.

Before dialing, the wireless communication terminal device needs to set the parameters of the dialing connection, such as APN, phone number, etc., from the PC side through the UI. You can provide an interface for setting the DNS address on the UI interface on the PC side, but when the UI calls the API on the PC side to set the DNS address for the dial-up connection of the mobile terminal, it will encounter the problem of operation authority. When the DNS address is set on the PC side, it will be rejected by the security management policy on the PC side, so it is not feasible to set the DNS address on the PC side UI. At the same time, in the latest operating system, such as the WIN 7 operating system, the OID method is used to set the parameters of the wireless communication terminal equipment, but there is no instruction to set DNS in the OID method, so it is necessary to develop a function on these systems. Set the function of DNS.

Contents of the invention

The object of the present invention is to solve the above problems, and propose a method and a mobile communication terminal capable of dynamically setting a domain name server.

In order to achieve the above object, the present invention provides a method for dynamically setting a domain name server. When a wireless communication terminal is powered on, initialize a primary domain name server (DNS) cache variable, a secondary DNS cache variable, and set a state variable; when initiating a dial-up connection process Detect the parameter information of the dial-up connection, if the dial-up parameter information contains the primary DNS address and the secondary DNS address, then record the DNS address and set the state variable; the packet data protocol (PDP) data is established between the network and the wireless data card Connect, when returning the information that the network assigns to the terminal, detect and set the state variable, if the state variable is set, then when the wireless communication terminal and the user equipment perform Dynamic Host Configuration Protocol (DHCP) or Internet Protocol Control Protocol (IPCP) negotiation process, Return the cached primary DNS address and secondary DNS address to the user equipment; if the setting status variable is not set, return the DNS address allocated by the network to the user equipment.

Further, the primary DNS cache variable and the secondary DNS cache variable record the addresses of the two DNS servers that the user finally wishes to obtain.

Further, when the user needs a domain name service, first send the resolution request to the server pointed to by the primary DNS address, if the primary DNS server does not respond, then send the resolution request to the secondary DNS server; set the status variable to record whether the user needs to set the DNS address , according to the value of the state variable to determine the DNS address that is finally fed back to the user.

Further, the process of initiating a dial-up connection refers to a data link connection between the user equipment and the wireless communication terminal when the dial-up starts, and the user equipment sends the parameter information of this dial-up to the wireless communication terminal; the set DNS address information It is sent to the wireless communication terminal through this data link, and after the PDP connection with the network side is established, the finally confirmed DNS address is sent to the user equipment through this data link.

Further, the PDP data connection refers to a packet data transmission link established between the wireless communication terminal and the mobile communication network after receiving the parameter information sent by the user equipment.

Further, the wireless communication terminal sends the parameter information of the PDP connection to the network side for negotiation, and the network side sends a PDP activation message to the wireless communication terminal after confirming the parameter information. During PDP information negotiation, the wireless communication terminal will send the DNS address information sent by the user equipment to the network side, and the network side will directly return the default DNS address of the network side.

Further, the DHCP or IPCP negotiation process means that when the wireless communication terminal establishes a wireless connection link with the network, it returns parameter information obtained from the network to the user equipment.

In addition, the present invention also proposes a wireless communication terminal that can dynamically set a domain name server, the wireless communication terminal includes a domain name server (DNS) application programming interface (API) module, a DNS information processing module, a network DNS information interaction module and DNS information return module;

Said setting DNS API interface module is used to make PC call this interface and set DNS address information;

The DNS information processing module is used to accept the DNS information set by the PC, and initialize the DNS information setting state;

The network DNS information interaction module accepts dial-up DNS information, and exchanges DNS information parameters with the network;

The DNS information returning module receives the DNS address information returned by the network side, and determines the DNS address information finally returned to the PC according to the mechanism set by the DNS information processing module.

Further, the DNS information processing module is also used for judging the process of setting the DNS information of the user.

Further, the network DNS information interaction module is also used to send DNS information to the network side when dialing starts, and resolve DNS address information after PDP activation.

The beneficial effects of the present invention are: compared with the prior art, the present invention provides users with a method for dynamically setting DNS addresses by analyzing the flow of the wireless communication terminal when the dial-up connection is established, so that the user can use the wireless data card to For data services, the specified DNS address can be set through the interface, so that a specific DNS server can be used for domain name resolution.

Description of drawings

Fig. 1 is the wireless data card interface connection model of the embodiment of the present invention;

FIG. 2 is a process for establishing a dial-up connection of a wireless data card according to an embodiment of the present invention;

FIG. 3 is a flow of sending DNS information of a wireless data card according to an embodiment of the present invention;

4 is a diagram of a DNS processing module set by a wireless data card according to an embodiment of the present invention;

FIG. 5 is a flow chart of dynamically setting DNS addresses by a wireless data card according to an embodiment of the present invention.

Detailed ways

The invention discloses a method for dynamically setting a DNS address when a wireless communication terminal establishes a dial-up connection and the wireless communication terminal.

The method for dynamically setting DNS addresses mainly includes: initializing primary DNS cache variables, secondary DNS cache variables and setting state variables when the wireless communication terminal is powered on. When the dial-up connection process is initiated, the parameter information of the dial-up connection is detected. If the dial-up parameter information includes the primary DNS address and the secondary DNS address, it means that the DNS address needs to be dynamically set, and the DNS address is recorded and the state variable is set. When the network and the wireless data card establish a PDP (Packet Data Protocol) data connection and return the information assigned to the terminal by the network, the state variable is detected and set. If the state variable is set, the mobile terminal and the user equipment are dynamically connected. During the negotiation process of the host setting protocol (Dynamic HostConfiguration Protocol, DHCP) or the Internet protocol control protocol (InterWorking Protocol Control Protocol, IPCP), the cached primary DNS address and secondary DNS address are returned to the user equipment; if the setting status variable is not set, then Return the DNS address assigned by the network to the user device without any modification.

The primary DNS cache variable and secondary DNS cache variable refer to two variables, which record the addresses of the two DNS servers that the user ultimately wishes to obtain. When the user needs domain name resolution service, the resolution request is first sent to the server pointed to by the primary DNS address, and if the primary DNS server does not respond, the resolution request is sent to the secondary DNS server. Set the status variable to record whether the user needs to set the DNS address, and determine the DNS address that is finally fed back to the user according to the value of the status variable.

The dial-up connection initiation process refers to the data link connection between the user equipment and the wireless communication terminal when the dial-up starts, and the user equipment sends the parameter information of this dial-up to the wireless communication terminal, such as: APN, dial-up number, authentication rights, etc. The set DNS address information is sent to the wireless communication terminal through this data link, and after the PDP connection with the network side is established, the finally confirmed DNS address is also sent to the user equipment through this data link.

The PDP data connection refers to a packet data transmission link established between the wireless communication terminal and the mobile communication network after receiving the parameter information sent by the user equipment. The wireless communication terminal sends the parameter information of the PDP connection to the network side for negotiation, and the network side sends the PDP activation message to the wireless communication terminal after confirming the parameter information. During PDP information negotiation, the wireless communication terminal will send the DNS address information sent by the user equipment to the network side, but the network test generally does not refer to the user's DNS address, but directly returns the default DNS address on the network side.

The DHCP or IPCP negotiation process refers to that when the wireless communication terminal establishes a wireless connection link with the network, it returns the parameter information obtained from the network to the user equipment, for example: the IP address assigned by the network to the wireless communication terminal, the DNS address wait. The DHCP process is adopted in the NDIS dial-up mode, and the IPCP process is adopted in the PDP-IP mode in the RAS dial-up mode.

The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The technical solution of the present invention generally adopts the application model of TE+MT, wherein the terminal equipment (Terminal Equipment, TE) is generally a PC or a notebook computer, and the mobile terminal (Mobile Terminal, MT) is generally a data card or a mobile phone. In the following embodiments, the wireless communication terminal is described by taking a wireless data card as an example.

As shown in FIG. 1 , it is a wireless data card interface connection model of this embodiment. As a mobile terminal, the data card is located between the terminal device and the core network. When using the wireless network, the connection between the terminal device and the RM interface of the data card must be established first, and then the connection between the data card and the core network must be established. This method is expanded on the dial model.

As shown in FIG. 2 , it is a process of establishing a dial-up connection of a wireless data card in this embodiment. As shown in Figure 2, when the terminal device needs to use the wireless network, it first initiates the dialing command of the dialing process to the wireless data card. After receiving the dialing command, the wireless data card judges the parameter information of the dialing. Returns a response to start dialing.

Then, the TE sends the link configuration parameter information of the RM port to the wireless data card, which is the LCP link information in the RAS dial-up mode, and the QMI signaling information in the NDIS dial-up mode. The wireless data card receives link configuration information, such as transmission block size, authentication method, protocol compression field, etc. The DNS information set is also included in this process. After the parameter information is judged, the wireless data card configures the parameters Respond to the request and complete the establishment of the RM port link.

After the connection of the RM port is established, the TE sends a network parameter information negotiation request to the wireless data card, including IP address, DNS address, PDP address, NBNS address and so on. After the wireless data card receives the request, it starts the UM port link establishment process, sends an Activate PDP Context Request to the GGSN, and establishes the RAB of the PDP context. After the GGSN passes the TE request, it will return the PDP context activation Accept the response, and the response message includes the IP address, DNS address, etc. assigned to the TE by the network, and completes the establishment of the UM port.

After receiving the parameter information allocated by the network, the wireless data card will return the information to the TE with a response message of the network parameter information, and complete a dial-up establishment process.

As shown in FIG. 3 , it is a flow chart of sending DNS information by the wireless data card in this embodiment.

At the beginning of each dial-up, the user sends the required DNS address information through the provided interface. When the user starts dialing, the information is sent to the data card along with the dial-up command. After the data card processes the DNS address information, Send the PDP activation request to the network side.

The network judges the user's PDP activation request information, and if it is legal, allocates the requested network resources to the user, and allocates DNS server address information according to its own policy, and sends the PDP activation acceptance information to the data card.

After the wireless data card receives the PDP activation acceptance information sent back from the network, it obtains DNS information from it. If it is not the DNS address information desired by the user, it replaces the DNS address information assigned by the network with the DNS address requested by the user, and stores the DNS address information A response message of successful connection is formed and returned to the user's PC.

The user's PC obtains the dial-up response message sent back by the data card, obtains DNS address information from it, and uses it as the DNS address of this dial-up connection, and then interacts with the domain name server to perform domain name resolution services when browsing web pages.

As shown in FIG. 4 , it is a module diagram included in setting DNS processing for the wireless data card of this embodiment.

The data card includes a DNS API (Application Programming Interface, application programming interface) interface module, a DNS information processing module, a network DNS information interaction module and a DNS information return module.

Set DNS API interface module: This module provides an interface for setting DNS address, which is used to make the PC call this interface to set DNS address information.

DNS information processing module: This module is used to accept the DNS information set by the PC, initialize the DNS information setting state, and judge the setting process of the user's DNS information.

Network DNS information interaction module: This module accepts the DNS information of this dial-up, and exchanges DNS information parameters with the network, sends the DNS information to the network side at the beginning of the dial-up, and analyzes the DNS address information after the PDP is activated.

DNS information return module: This module accepts the DNS address information returned by the network side, and determines the final DNS address information returned to the PC according to the mechanism set by the DNS information processing module.

As shown in FIG. 5, the flow chart of dynamically setting the DNS address for the wireless data card of this embodiment includes the following steps:

Step 501, when the wireless data card is powered on, initialize the cache address of the primary DNS and the secondary DNS to 0, and initialize the state variable to a null value;

Step 502, setting primary DNS address and secondary DNS address information;

Before the dial-up connection is established, the DNS address information is set through the provided interface. The present invention provides two kinds of interfaces: AT command and QMI command. The wireless data card saves the primary DNS address and the secondary DNS address set by the TE, and sets the setting status bit to 1. In NDIS dialing, it can be set in two ways. When both ways are set at the same time, the last setting before the dialing starts shall prevail.

Step 503, obtaining DNS address information from link negotiation information;

In the NDIS dial-up mode, the DNS address set by the TE is sent to the wireless data card in the link negotiation information, so in the NDIS dial-up mode, the set primary DNS and secondary DNS information need to be obtained from the QMI signaling.

Step 504, PDP context activation process;

The wireless data card composes the parameter information issued by the TE into a PDP activation request message and sends it to the network side. This message contains DNS information, but the network side generally does not use the DNS address in the message, but uses the default DNS address The PDP Activation Accept message is returned to the wireless data card.

Step 505, judging whether the state variable is set;

After the PDP is activated, the wireless data card judges to set the status bit of the DNS. If the status bit has been set, then go to step 506. It is necessary to dynamically set the DNS address information, and replace the DNS allocated by the network with the cached primary DNS address and secondary DNS address. Address; if the status bit is not set, then proceed to step 507, without setting, return the DNS address assigned by the network.

Step 506, replace the DNS address allocated in the PDP activation message with the cached DNS address, and clear the primary DNS cache, secondary DNS cache, and setting status bit, so that the current setting will not affect the next dialing information.

Step 507, network parameter information response;

The wireless network card returns the parameter information assigned by the network to the TE, and the parameter information includes IP address, DNS address, and NBNS address. In the RAS dial-up mode, the IPCP configuration reply message is returned to the TE; while in the NDIS dial-up mode, the network parameter information is returned to the TE through the DHCP process. The DNS address information contained in the network parameter information is the DNS address set by the TE, so far the dynamic setting of the DNS address is completed.

Through the above technical solution, the user can set the DNS server address according to his own needs, making the wireless communication terminal more operable, and has the following characteristics:

The user's static setting is combined with the network dynamic allocation. If the user needs to use a specific DNS address, you can use this function to set it; if the user does not need to specify the DNS address, you don't need to do any additional operations, and it is directly allocated by the network. The default DNS address will not inconvenience the user.

The operation is simple and flexible. Users only need to call the interface to set two parameters. In use, only one DNS address can be set, while the other uses the network default DNS address, such as setting a specific primary DNS, and using the network-allocated DNS address Secondary DNS address.

The user is not restricted by the operation authority, and can make settings when needed.

Support WCDMA NDIS dial-up and RAS PDP-IP dial-up.

It should be noted that, in addition to the modules and units involved in the embodiments, the devices involved in the present invention also include other components known to those skilled in the art. In order to highlight the inventive idea of the present invention, the In the embodiment, only the modules related to the inventive idea of the present invention are described, and other known components in the device are not described in detail.

What has been described above is only a preferred example of the present invention, and certainly cannot limit the scope of rights of the present invention with this. Various corresponding changes and modifications can be made, but these corresponding changes and modifications should all belong to the protection scope of the appended claims of the present invention.

Claims (9)

1. A method that can dynamically set a domain name server, is characterized in that: when the wireless communication terminal is powered on, initialize the main domain name server DNS cache variable, the auxiliary DNS cache variable and the setting state variable; when initiating a dial-up connection process, detect the dial-up The parameter information of connection, if comprise primary DNS address and secondary DNS address in dialing parameter information, then record DNS address and set state variable; Set up packet data protocol PDP data connection in network and wireless communication terminal, return network to assign to When the information of the terminal is checked, the state variable is detected and set. If the state variable is set, the cached primary DNS address and secondary DNS address will be cached when the wireless communication terminal and the user equipment perform dynamic host configuration protocol DHCP or Internet protocol control protocol IPCP negotiation process. Return to the user equipment; if the setting state variable is not set, return the DNS address assigned by the network to the user equipment; The dial-up connection initiation process refers to the data link connection between the user equipment and the wireless communication terminal when the dial-up starts, and the user equipment sends the parameter information of this dial-up to the wireless communication terminal; the DNS address information set through this The data link is sent to the wireless communication terminal, and after the PDP connection with the network side is established, the finally confirmed DNS address is sent to the user equipment through this data link. 2. The method according to claim 1, characterized in that: the primary DNS cache variable and the secondary DNS cache variable record the addresses of the two DNS servers that the user finally wishes to obtain. 3. The method according to claim 1, characterized in that: when the user needs domain name service, the resolution request is first sent to the server pointed to by the primary DNS address, and if the primary DNS server does not respond, the resolution request is sent to the secondary DNS Server; set the state variable to record whether the user needs to set the DNS address, and determine the final DNS address to be fed back to the user according to the value of the state variable. 4. The method according to claim 1, wherein: the PDP data connection refers to a packet data transmission link established between the wireless communication terminal and the mobile communication network after receiving the parameter information sent by the user equipment . 5. The method according to claim 1, wherein the wireless communication terminal sends the parameter information of the PDP connection to the network side for negotiation, and the network side sends a PDP activation message to the wireless communication terminal after confirming the parameter information; During PDP information negotiation, the wireless communication terminal will send the DNS address information sent by the user equipment to the network side, and the network side will directly return the default DNS address of the network side. 6. The method according to claim 1, characterized in that: the DHCP or IPCP negotiation process means that the wireless communication terminal returns parameter information obtained from the network to the user equipment when establishing a wireless connection link with the network. 7. A wireless communication terminal capable of dynamically setting a domain name server, characterized in that: the wireless communication terminal includes a domain name server DNS application programming interface API module, a DNS information processing module, a network DNS information interaction module and a DNS information return module ; Said setting DNSAPI interface module is used to make PC call this interface and set DNS address information; The DNS information processing module is used to accept the DNS information set by the PC, and initialize the DNS information setting state; The network DNS information interaction module accepts dial-up DNS information, and exchanges DNS information parameters with the network; The DNS information returning module receives the DNS address information returned by the network side, and determines the DNS address information finally returned to the PC according to the mechanism set by the DNS information processing module. 8. The wireless communication terminal according to claim 7, characterized in that: the DNS information processing module is also used for judging the process of setting the DNS information of the user. 9. The wireless communication terminal according to claim 7, wherein the network DNS information interaction module is further configured to send DNS information to the network side when dialing starts, and resolve DNS address information after PDP activation.

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