CN102833364A - Domain name resolution agent method and gateway device - Google Patents
Domain name resolution agent method and gateway device Download PDFInfo
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- CN102833364A CN102833364A CN2012103007179A CN201210300717A CN102833364A CN 102833364 A CN102833364 A CN 102833364A CN 2012103007179 A CN2012103007179 A CN 2012103007179A CN 201210300717 A CN201210300717 A CN 201210300717A CN 102833364 A CN102833364 A CN 102833364A
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Abstract
An embodiment of the invention discloses a domain name resolution agency method and a gateway device. By the domain name resolution agent method, the gateway device can agent domain name resolution for IPV4 (internet protocol version 4) and IPV6 (internet protocol version 6) networks. The method include: receiving domain name system (DNS) resolution request information sent by a terminal; selecting a domain name server according to the structure of the IP address; sending the DNS resolution request information to the selected domain name server; and receiving DNS resolution response information sent by the domain name server, and sending the DNS resolution response information to the terminal. The DNS resolution request information includes the structure of an interlinked protocol IP (internet protocol) address between the networks of the terminal in the DNS resolution request information. Therefore, the gateway device can have a domain name resolution agency function for both the IPV4 network and the IPV6 network.
Description
Technical field
The present invention relates to the domain name system technology, relate in particular to a kind of domain name resolution agent method and gateway device.
Background technology
Continuous development along with network application; Existing Internet Protocol Version 4 (Internet Protocol version 4, network address IPV4) exhausts, IPv6 (Internet Protocol version6; IPV6) deployment of network is accelerated; Because huge IPV4 user and the equipment of quantity in the scale of internet and the present network, people can't accept the upgrading of a large amount of switch forms, and IPV4 is to the impossible disposable realization of the transition of IPV6; To the IPV6 transition also will be a process relatively slowly, estimate that IPV4 and IPV6 are with long-term co-existence.
At IPV4 and IPV6 in the network coexisted stage; Different operators can use the various network type to realize the various network access mode according to the needs of oneself; At present; Network type comprises: the single stack network of IPV4, the single stack network of IPV6, IPV4/IPV6 dual-stack network, technological light-weight dual-stack network (DS-LITE), IPV6 are disposed (6rd) network fast.
Wherein, The DS-LITE network provides the IPV6 tunnel to carry the mode of IPV4 data service; One end of DS-LITE network can be connected gateway device; An other end is handled at the IPV6 network boundary, and mainly connecting network is the IPV6 network, and the visit of IPV4 network is passed through the IPV6 network through tunneling technique and realized.The 6rd network then provides the IPV4 tunnel to carry the mode of IPV6 data service; One end of 6rd network can be connected gateway device; An other end is at IPV4 network boundary place, and mainly connecting network is the IPV4 network, and the visit of IPV6 network is passed through the IPV4 network through tunneling technique and realized.And be the transitional technology that is used to accelerate IPV6 evolution procedure deployment at present when DS-LITE network and 6rd network.
Under the increasing network terminal is supported IPV4 and the situation communicated by letter in the IPV6 network address simultaneously; Domain name system (Domain Name System; DNS) also variation of request mode; Equipment can use the host address request IPV4 of IPV4 and the DNS of IPV6, also can use the host address request IPV4 of IPV6 and the DNS of IPV6.
In the prior art; Gateway device is the edge device that connects IPV4/IPV6 network and terminal; In the face of different IPV4/IPV6 network environment access waies; Can only be that the terminal provides domain name resolution agent function to the IPV4 network at present, and domain name resolution agent can not be provided for the terminal of IPV6 network, can not adapt to and limit technological development.
Summary of the invention
The embodiment of the invention provides a kind of domain name resolution agent method and gateway device; Be used for the dns resolution request that gateway device proxy resolution terminal type is the terminal of IPV4 and IPV6; Make gateway device not only prodigiosin for the IPV4 network domain name resolution agent function is provided, also can be the domain name resolution agent function that provides of IPV6 network.
The embodiment of the invention provides a kind of domain name resolution agent method on the one hand, comprising:
The domain name system DNS analysis request message that receiving terminal sends comprises the structure of the protocol IP address that interconnects between the network at said terminal in the said dns resolution request message;
Structure choice name server according to said IP address;
Said dns resolution request message is sent to the name server of selection;
Receive the dns resolution response message that the domain name server sends, said dns resolution response message is sent to said terminal.
The embodiment of the invention provides a kind of gateway device on the other hand, comprising:
Receiver module is used for the domain name system DNS analysis request message that receiving terminal sends, and comprises the structure of the protocol IP address that interconnects between the network at terminal in the dns resolution request message;
Select module, be used for after said receiver module receives the dns resolution request message, according to the structure choice name server of IP address;
Sending module is used for after said selection module is selected name server, the dns resolution request message being sent to the name server of selection;
Receive sending module, be used for after said sending module sends said dns resolution request message, receive the dns resolution response message that name server sends, the dns resolution response message is sent to the terminal.
Can find out that from above technical scheme the embodiment of the invention has the following advantages:
Gateway device receives after the dns resolution request message that sends at the terminal; Structure choice name server according to the IP address that comprises in this dns resolution request message; And the dns resolution request message sent to the name server of selection; And the dns resolution response message of the name server that receives feedback is sent to corresponding terminal,, make gateway device the domain name mapping function to be provided for IPV4 and IPV6 network through structure choice name server according to the IP address at terminal.
Description of drawings
Fig. 1 is a sketch map of a kind of domain name resolution agent method in the embodiment of the invention;
Fig. 2 is another sketch map of a kind of domain name resolution agent method in the embodiment of the invention;
Fig. 3 is a sketch map of the structure of gateway device in the embodiment of the invention;
Fig. 4 is another sketch map of the structure of gateway device in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of domain name resolution agent method and gateway device, is used for the domain name mapping of gateway device Agent IP V4 and IPV6 network, makes gateway device the domain name mapping function to be provided for IPV4 and IPV6 network.
See also Fig. 1, the embodiment for a kind of domain name resolution agent method in the embodiment of the invention comprises:
101, the dns resolution request message that sends of receiving terminal comprises the structure of the IP address at terminal in the dns resolution request message;
In embodiments of the present invention; Certain network equipment is visited at the terminal if desired; To send the dns resolution request message to the gateway device with proxy resolution function, gateway device comprises the structure of the IP address at terminal with the dns resolution request message that receiving terminal sends in this dns resolution request message; In addition, also can comprise the domain name that terminal request is resolved in the dns resolution request message.
In embodiments of the present invention, the structure of the IP address at terminal mainly is meant the figure place of IP address, and for example: the structure of the IP address at the terminal in the IPV4 network is 32.
102, according to the structure choice name server of IP address;
In embodiments of the present invention, gateway device will be that name server is selected at the terminal according to the structure of the IP address that comprises in the dns resolution request message.
Need to prove that in embodiments of the present invention, gateway device has been preset corresponding name server according to the network type at its place, and gateway device also will upgrade the realization dynamic-configuration to preset name server.
In embodiments of the present invention, gateway device can select to resolve the name server of the dns resolution request message that receives according to the structure of the IP address at terminal from its preset name server.
103, the dns resolution request message is sent to the name server of selection;
In embodiments of the present invention, gateway device will send the dns resolution request message to the name server of selecting, and with the name server that request is selected the domain name of carrying in the dns resolution request message resolved.
104, receive the dns resolution response message that name server sends, the dns resolution response message is sent to the terminal.
In embodiments of the present invention; The name server of selecting will be resolved the domain name of carrying in the dns resolution request message that receives, and analysis result is carried in the dns resolution response message send to gateway device, wherein; The corresponding relation of storage domain name and IP address in the name server; And corresponding at least one the IP address of domain name, wherein, analysis result can be the corresponding relevant informations such as IP address of domain name.
Gateway device sends to corresponding terminal with this dns resolution response message after the dns resolution response message that receives the name server transmission.
In embodiments of the present invention; Through utilizing the structure choice name server of the IP address of carrying in the dns resolution request message; Make gateway device can select suitable name server request that domain name is resolved, have the proxy resolution function of IPV4 and IPV6 network.
A kind of domain name resolution agent method among the embodiment sees also Fig. 2 for a better understanding of the present invention, and another embodiment for domain name resolution agent method in the embodiment of the invention comprises:
201, the dns resolution request message that sends of receiving terminal comprises the structure of the IP address at terminal in the dns resolution request message;
The similar content that step 201 and step 101 shown in Figure 1 are described repeats no more here.
202, utilize the terminal type of the structure identification terminal of IP address, terminal type is IPV4 or IPV6;
In embodiments of the present invention, comprise the mechanism of the IP address at terminal in the dns resolution request message, the terminal type of the structure identification terminal of gateway device IP capable of using address; Wherein, The terminal type at this terminal can be IPV4, also can be IPV4, wherein; The source address of IPV4 and destination address all are 32, and the source address of IPV6 and destination address all are 128.If it is 32 that gateway device detects the structure of the IP address at terminal, the terminal type that then can confirm the terminal is IPV4, is 128 if gateway device detects the structure of the IP address at terminal, and the terminal type that then can confirm the terminal is IPV6.
203, the name server of from preset name server, selecting the terminal to use according to terminal type;
In embodiments of the present invention; Gateway device can be according to the network environment of its work at present, preset name server, wherein; The network environment of gateway device work at present can be the single stack of IPV4, the single stack of IPV6 or IPV4 and the two stacks of IPV6; Therefore, gateway device is under the various network environment, predeterminable different name server.
In embodiments of the present invention; Gateway device can be selected available name server according to the terminal type at terminal from preset name server; Concrete, if when the terminal type at terminal is IPV4, then judge in the preset name server of gateway device whether comprise at least one IPV4 name server; If; Then gateway device is selected the name server that the IPV4 name server in the preset name server can be used as the terminal, and if not, then gateway device is selected the name server that the IPV6 name server can be used as the terminal; Perhaps; If the terminal type at terminal is IPV6; Then gateway device judges in its preset name server whether comprise at least one IPV6 name server, if then gateway device is selected the name server that the IPV6 name server in its preset name server can be used as the terminal; If not, the gateway device name server of selecting the IPV4 name server can use then as the terminal.
204, the dns resolution request message is sent to the name server of selection;
In embodiments of the present invention; Gateway device sends to the dns resolution request message that receives the name server of selection; Concrete: gateway device can send the dns resolution request message to the name server of selecting according to order that is provided with in advance or access privileges, wherein, comprises the domain name that interrupt requests is resolved in the dns resolution request message; After name server receives the dns resolution request message; With the domain name of obtaining in the dns resolution request message, and in the corresponding relation of its domain name that presets and IP address, search the corresponding IP address of domain name of sending, and the dns resolution response message that will carry this IP address sends to gateway device with the terminal.
205, receive the dns resolution response message that name server sends, the dns resolution response message is sent to the terminal.
In embodiments of the present invention; Gateway device will receive the dns resolution response message of the name server feedback of selection; Comprise the IP address that the domain name server parses obtains in this dns resolution response message; At last, gateway device feeds back to corresponding terminal with this dns resolution response message, makes the terminal can obtain the corresponding IP address of domain name of its visit.
In embodiments of the present invention; Gateway device is after receiving the dns resolution request message that sends at the terminal; To confirm the terminal type at terminal according to the structure of the IP address of carrying in this message; This terminal type can be IPV4 or IPV6, and the gateway device name server that will select the terminal to use according to the terminal type at terminal, and sends the dns resolution request message to the name server of selecting; After the dns resolution response message of the name server feedback that receives selection; This dns resolution response message is fed back to corresponding terminal, select available name server, make gateway device can have the function of proxy resolution of function and IPV6 network of the proxy resolution of IPV4 network through terminal type according to the terminal.
See also Fig. 3, the embodiment for gateway device in the embodiment of the invention comprises:
Select module 302, be used for after receiver module receives the dns resolution request message, according to the structure choice name server of IP address;
Sending module 303 is used for after selecting module selection name server, the dns resolution request message being sent to the name server of selection;
Receive sending module 304, be used for after sending module sends the dns resolution request message, receiving the dns resolution response message that name server sends, the dns resolution response message is sent to the terminal.
In embodiments of the present invention, will start to write to the gateway with dialing analytical capabilities and send the dns resolution request message if need visit to touch a network equipment in the terminal; Receiver module 301 in the gateway device will receive this dns resolution request message; Wherein, because of comprising the structure of the IP address at terminal in this dns resolution request message, therefore; Select the module 302 can be according to the structure choice name server of the IP address at terminal; And will the dns resolution request message be sent to the name server of selection by sending module 303, the domain name that comprises in the dns resolution request message resolved, after name server sends the dns resolution response message by the name server of this selection; Reception transmitting element 304 in the gateway device will receive the dns resolution response message that name server sends, and this dns resolution response message is sent to the terminal.
In embodiments of the present invention, the structure of the IP address at terminal mainly is meant the figure place of IP address, and for example: the structure of the IP address at the terminal in the IPV4 network is 32.
In embodiments of the present invention; Through utilizing the structure choice name server of the IP address of carrying in the dns resolution request message; Make gateway device can select suitable name server request that domain name is resolved, have the proxy resolution function of IPV4 and IPV6 network.
Gateway device among the embodiment sees also Fig. 4 for a better understanding of the present invention, and another embodiment for the structure of gateway device in the embodiment of the invention comprises:
The receiver module of describing among the embodiment as shown in Figure 3 301 is selected module 302, sending module 303, is received sending module 304, and with embodiment illustrated in fig. 3 in the similar content described, repeat no more here.
Wherein, select module 302 to comprise:
Identification module 401 is used to utilize the terminal type of the structure identification terminal of IP address, and terminal type is IPV4 or IPV6;
Server is selected module 402, is used for the name server of selecting the terminal to use from preset name server according to terminal type.
In embodiments of the present invention, server selection module 402 specifically is a name server of from preset name server, selecting the terminal to use according to terminal type according to following mode:
If the terminal type at terminal is IPV4, then server selects module 402 to judge in the preset name server whether comprise at least one IPV4 name server; If, the name server of then selecting this at least one IPV4 name server can use as the terminal; If not, the name server of then selecting the IPV6 name server can use as the terminal;
Perhaps, if the terminal type at terminal is IPV6, then server selects module 402 to judge in the preset name server whether comprise at least one IPV6 name server; If, the name server of then selecting this at least one IPV6 name server can use as the terminal; If not, the name server of then selecting the IPV4 name server can use as the terminal.
In embodiments of the present invention; Gateway device is after receiving the dns resolution request message that sends at the terminal; To confirm the terminal type at terminal according to the structure of the IP address of carrying in this message; This terminal type can be IPV4 or IPV6, and the gateway device name server that will select the terminal to use according to the terminal type at terminal, and sends the dns resolution request message to the name server of selecting; After the dns resolution response message of the name server feedback that receives selection; This dns resolution response message is fed back to corresponding terminal, select available name server, make gateway device can have the function of proxy resolution of function and IPV6 network of the proxy resolution of IPV4 network through terminal type according to the terminal.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than a kind of domain name resolution agent method provided by the present invention and gateway device have been carried out detailed introduction; For one of ordinary skill in the art; Thought according to the embodiment of the invention; The part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. a domain name resolution agent method is characterized in that, comprising:
The domain name system DNS analysis request message that receiving terminal sends comprises the structure of the protocol IP address that interconnects between the network at said terminal in the said dns resolution request message;
Structure choice name server according to said IP address;
Said dns resolution request message is sent to the name server of selection;
Receive the dns resolution response message that the domain name server sends, said dns resolution response message is sent to said terminal.
2. Proxy Method according to claim 1 is characterized in that, said structure choice name server according to said IP address comprises:
Utilize the structure of said IP address to discern the terminal type at said terminal, said terminal type is IPV4 or IPV6;
According to the said terminal type name server that the said terminal of selection can be used from preset name server.
3. Proxy Method according to claim 2 is characterized in that, saidly from preset name server, selects available name server to comprise according to said terminal type:
If the terminal type at said terminal is IPV4, then judge whether comprise at least one IPV4 name server in the said preset name server;
If, the name server of then selecting said at least one IPV4 name server can use as said terminal;
If not, the name server of then selecting the IPV6 name server can use as said terminal.
4. Proxy Method according to claim 3 is characterized in that, saidly from preset name server, selects available name server also to comprise according to said terminal type:
If the terminal type at said terminal is IPV6, then judge whether comprise at least one IPV6 name server in the said preset name server;
If, the name server of then selecting said at least one IPV6 name server can use as said terminal;
If not, the name server of then selecting the IPV4 name server can use as said terminal.
5. a gateway device is characterized in that, comprising:
Receiver module is used for the domain name system DNS analysis request message that receiving terminal sends, and comprises the structure of the protocol IP address that interconnects between the network at terminal in the dns resolution request message;
Select module, be used for after said receiver module receives the dns resolution request message, according to the structure choice name server of IP address;
Sending module is used for after said selection module is selected name server, the dns resolution request message being sent to the name server of selection;
Receive sending module, be used for after said sending module sends said dns resolution request message, receive the dns resolution response message that name server sends, the dns resolution response message is sent to the terminal.
6. gateway device according to claim 5 is characterized in that, said selection module comprises:
Identification module is used to utilize the structure of said IP address to discern the terminal type at said terminal, and said terminal type is IPV4 or IPV6;
Server is selected module, is used for the name server of selecting said terminal to use from preset name server according to said terminal type.
7. gateway device according to claim 6 is characterized in that, said server selects module specifically to be used for: if the terminal type at said terminal is IPV4, then judge whether comprise at least one IPV4 name server in the said preset name server; If, the name server of then selecting said at least one IPV4 name server can use as said terminal; If not, the name server of then selecting the IPV6 name server can use as said terminal.
8. gateway device according to claim 7 is characterized in that, said server selects module specifically also to be used for: if the terminal type at said terminal is IPV6, then judge whether comprise at least one IPV6 name server in the said preset name server; If, the name server of then selecting said at least one IPV6 name server can use as said terminal; If not, the name server of then selecting the IPV4 name server can use as said terminal.
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Application publication date: 20121219 |