CN104683501A - Method and device for domain name resolution - Google Patents
Method and device for domain name resolution Download PDFInfo
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- CN104683501A CN104683501A CN201510143842.7A CN201510143842A CN104683501A CN 104683501 A CN104683501 A CN 104683501A CN 201510143842 A CN201510143842 A CN 201510143842A CN 104683501 A CN104683501 A CN 104683501A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/58—Caching of addresses or names
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Abstract
The invention provides a method and a device for domain name resolution, wherein the method comprises the following steps: acquiring a domain name resolution request, and checking that whether a local domain name buffer table item contains resolution information corresponding to a domain name carried by the domain name resolution request; if so, acquiring the resolution information corresponding to the domain name in the local domain name buffer table item; otherwise, transmitting the domain name resolution request to a domain name resolution server to perform domain name resolution, acquiring the resolution information corresponding to the domain name in the domain name resolution request after performing domain name resolution, and saving the resolution information into the local domain name buffer table item. By adopting the method and the device provided by the invention, the time for domain name resolution can be effectively saved, and the access speed of a network is promoted.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of domain name analytic method and device.
Background technology
The application program of the network equipment, before communicating with objective network, needs the IP address first being got objective network by domain name mapping function, and then could access destination network.At present, when carrying out domain name mapping to objective network, can issue name server according to the domain name generation domain name mapping request of the objective network that will resolve and carry out domain name mapping, when after the analysis result receiving domain name resolution server, this analysis result is directly returned to application program by the network equipment.Before access again during parsed objective network, also again can generate domain name mapping request according to the domain name of objective network, so, a large amount of domain name mapping time will be wasted, reduce the access speed of network simultaneously.
Summary of the invention
For the defect of prior art, the invention provides a kind of domain name analytic method and device.
The invention provides a kind of domain name analytic method, be applied to the network equipment, wherein, the method comprises:
Obtain domain name mapping request, and check in home domain name buffering list item whether have the resolving information corresponding with the domain name of carrying in domain name analysis request;
If have, obtain resolving information corresponding with domain name in described home domain name buffering list item;
Otherwise, domain name analysis request is sent to domain name resolution server and carries out domain name mapping, and obtain after carrying out domain name mapping and the resolving information corresponding to domain name in domain name analysis request, described resolving information is saved in described home domain name buffering list item.
The present invention also provides a kind of domain name mapping device, is applied to the network equipment, and described device comprises:
Formation inspector part, for obtaining domain name mapping request, and checks in described home domain name buffering list item whether have the resolving information corresponding with the domain name of carrying in domain name analysis request;
Information acquisition unit, when having the resolving information corresponding with the domain name of carrying in domain name analysis request for cushioning in list item in the described home domain name of inspection, obtains resolving information corresponding with domain name in described home domain name buffering list item;
Domain name buffer cell, for when checking resolving information not corresponding with the domain name of carrying in domain name analysis request in described home domain name buffering list item, domain name analysis request is sent to domain name resolution server and carries out domain name mapping, and obtain after carrying out domain name mapping and the resolving information corresponding to domain name in domain name analysis request, described resolving information is saved in described home domain name buffering list item.
Domain name analytic method provided by the invention and device, by the resolving information parsed being saved in described home domain name buffering list item, so that when subsequently received domain name mapping request, if check in home domain name buffering list item have the resolving information corresponding with it, the resolving information that can obtain this correspondence returns to application program as analysis result, and then save the time of domain name mapping, promote the access speed of network.
Accompanying drawing explanation
Fig. 1 is the network environment schematic diagram that the embodiment of the present invention is applied;
Fig. 2 is a kind of domain name analytic method schematic flow sheet in the embodiment of the present invention;
Fig. 3 is the network environment schematic diagram that in the embodiment of the present invention, a kind of domain name analytic method is applied;
Fig. 4 is the logical construction schematic diagram of a kind of domain name mapping device in the embodiment of the present invention;
Fig. 5 is the hardware structure schematic diagram of the domain name mapping device place network equipment in the embodiment of the present invention.
Embodiment
For making the object of the application, technical scheme and advantage are clearly understood, are described in further detail the application's scheme referring to accompanying drawing.
In order to solve problems of the prior art, the invention provides a kind of domain name analytic method and device.
Fig. 1 is domain name analytic method place of the present invention network environment schematic diagram, comprises the network equipment (intelligent television) and dns server.This network equipment can be the equipment such as intelligent television, Set Top Box, network machine top box.The present invention is that intelligent television is described for this network equipment.Wherein, this intelligent television can be the intelligent television using android (Android) system.
Please refer to Fig. 2, be the handling process schematic diagram of domain name analytic method provided by the invention, this domain name analytic method can be applicable to the network equipments such as intelligent television, and this domain name analytic method comprises the following steps:
Step 201, obtains domain name mapping request, and checks in home domain name buffering list item whether have the resolving information corresponding with the domain name of carrying in domain name analysis request;
Wherein, this resolving information can be the IP address corresponding with domain name.
In prior art, the application program of intelligent television is when access destination network, need to be sent to domain name resolution server (such as dns server) according to the domain name generation domain name mapping request of objective network and carry out domain name mapping, and, getting corresponding resolving information (such as, the IP address of objective network) after, could communicate with objective network.
But current intelligent television, when each access destination network, all needs to carry out domain name mapping, also still needed so even if carry out domain name mapping to same domain name before.Thus, a large amount of time and resource can just be wasted in domain name mapping.
In the present invention, in advance the address information of dns server in the system property of intelligent television can be set to local loopback address, such as 127.0.0.1.
At the application program access destination network of intelligent television, need to the request of dns server sending domain name analysis to carry out domain name mapping time, the destination address of its domain name mapping request generated is then this local loopback address 127.0.0.1, further, the port numbers of dns server is also carried in this domain name mapping request.Wherein, the object IP address of domain name mapping request is set to local loopback address, and carry the port numbers of dns server, this domain name mapping request can be made directly not mail to dns server and to carry out domain name mapping, but receive this domain name mapping request by the dns server of network equipment local virtual, and resolved the domain name of carrying in this domain name mapping request by the dns server of local virtual.
Afterwards, the dns server of local virtual is according to the domain name of carrying in this domain name mapping request, in the home domain name buffering list item being pre-stored in memory (can be the buffering area of internal memory), search whether there be the resolving information corresponding with this domain name, to judge whether to carry out parsing to the domain name in this domain name mapping request.
Wherein, this home domain name buffering list item being pre-stored in memory carried out the domain name of domain name mapping and the corresponding relation of resolving information for preserving.
Step 202, if find the resolving information corresponding with this domain name in the home domain name buffering list item prestored, obtains resolving information corresponding with domain name in described home domain name buffering list item;
If there is the resolving information corresponding with the domain name of carrying in domain name mapping request in home domain name buffering list item, illustrate and domain name mapping was carried out to this domain name.So, corresponding resolving information in this home domain name buffering list item can being returned to the application program of request domain name analysis, to make this application program communicate with objective network, and carrying out domain name mapping without the need to again this domain name mapping request being sent to dns server.
Step 203, if do not find the resolving information corresponding with this domain name in the home domain name buffering list item prestored, domain name analysis request is sent to domain name resolution server and carries out domain name mapping, and obtain after carrying out domain name mapping and the resolving information corresponding to domain name in domain name analysis request, described resolving information is saved in described home domain name buffering list item.
In the present invention, the address information list item of a domain name resolution server can be preset, preserve the network used in the address information list item of this domain name resolution server and connect the address information with corresponding domain name resolution server.
Wherein, this network connects can be the network connection type such as WIFI (Wireless-Fidelity, wireless network), Ethernet (Ethernet), 4G (forth generation mobile communication technology) that user uses.
Under initial situation, or when first the domain name in domain name mapping request being resolved, in this domain name buffering list item, then cannot find corresponding resolving information.So can be connected with the extraneous network used that communicates according to current intelligent television, corresponding dns server address is connected prestoring to search to the address information list item of the domain name resolution server of local storage (can be the buffering area of internal memory) with presently used network, new domain name mapping request is generated according to the dns server address of this correspondence, the object IP address of this new domain name mapping request is then connect corresponding dns server address with presently used network, all the other contents are consistent with former domain name mapping request, and new domain name mapping request sent to corresponding dns server to carry out domain name mapping.
Receive this correspondence dns server reply receive the response after, obtain this receive the response in resolving information, this resolving information is then the IP address of the objective network drawn after dns server is resolved the domain name in domain name mapping request.Afterwards, this back message is sent to the application system of request access objective network, communicate with objective network to make this application program.This resolving information is saved in home domain name buffering list item, during resolving information corresponding to this domain name of follow-up acquisition, domain name mapping need not be carried out by dns server more simultaneously.
Further, invalid dns server address is there is in order to prevent the address information list item of domain name resolution server, the present invention when the disconnection connected to the network of the described network equipment being detected, can also delete the address information of the domain name resolution server of the correspondence all connected to the network prestored in the address information list item of domain name resolution server.When can effectively avoid because there is invalid dns server address, to invalid dns server sending domain name analysis request, cause because of etc. dns server to be invalidated return analysis result, and be delayed the time obtaining domain name mapping information.
Below in conjunction with Fig. 3, the present invention is illustrated.
Suppose, when the application program difference access destination network www.letv.com and objective network www.***.com of intelligent television, can send respectively to dns server and have the domain name mapping request that domain name is " www.letv.com " and " www.***.com ".
System property due to intelligent television is set to local loopback address 127.0.0.1, so the object IP address of this domain name mapping request is then 127.0.0.1, simultaneously, this domain name mapping request also carries the port numbers (such as 18) of dns server, with the dns server making the domain name mapping request of the port numbers 18 with local loopback address 127.0.0.1 and dns server can mail to local virtual accurately.
Wherein, domain name mapping device shown in Fig. 3 can be the dns server of local virtual, local loopback address 127.0.0.1 at the destination address of domain name mapping request, and domain name mapping request is when carrying the port numbers 18 of dns server, the dns server of local virtual can receive this domain name mapping request, parse the domain name " www.letv.com " and " www.***.com " of carrying in domain name mapping request, and in the home domain name buffering list item prestored, search whether have the resolving information corresponding with this domain name according to the domain name of carrying in domain name mapping request respectively.Such as, home domain name buffering list item can be as shown in table 1:
| Domain name | Resolving information (IP address) |
| www.letv.com | 4.4.4.4 |
| www.***.com | 5.5.5.5 |
| www.sina.com | 6.6.6.6 |
Table 1
Table 1 shows home domain name buffering list item, is only for understanding example of the present invention further, is not limited to the particular content of domain name buffering list item in the embodiment of the present invention.
After finding domain name " www.letv.com " in Table 1, illustrate and domain name mapping was carried out to this domain name, so, resolving information corresponding with domain name " www.letv.com " in this home domain name buffering list item can be obtained, that is, the IP address 4.4.4.4 that " www.letv.com " is corresponding.Afterwards, this IP address 4.4.4.4 is informed the application program of sending domain name analysis request by the dns server of local virtual, to make it can access destination network www.letv.com.
But for domain name " www.***.com ", can not find the resolving information corresponding with it at table 1 item, now, domain name " www.***.com " is for carry out domain name mapping first.So, the dns server of local virtual can obtain the network that current intelligent television uses and connect, and obtains in the address information list item of domain name resolution server and connect corresponding dns server address with the network of current use.Such as, the address information list item of this domain name resolution server can shown in reference table 2:
| Network connection type | Dns server address |
| WIFI | 1.1.1.1 |
| Ethernet | 2.2.2.2 |
| 4G | 3.3.3.3 |
Table 2
Table 2 illustrates the address information list item of domain name resolution server, being only for understanding example of the present invention further, being not limited to the particular content of the address information list item of domain name resolution server in the embodiment of the present invention.
Suppose, current intelligent television uses WIFI to communicate with the external world, so can cushion in list item in home domain name and search the dns server address corresponding with WIFI, such as 1.1.1.1, and the destination address of the domain name mapping request application program of intelligent television generated obtains new domain name mapping request after being revised as the dns server address 1.1.1.1 corresponding with WIFI, carry out domain name mapping with the dns server that the domain name mapping request making this new can send to IP address to be 1.1.1.1.Wherein, all the other contents of this new domain name mapping request are consistent with former domain name mapping request.
Object IP address due to the domain name mapping request of current transmission is the dns server address 1.1.1.1 corresponding with WIFI, and be no longer the loopback address 127.0.0.1 in system property, therefore, what this domain name mapping request can be errorless be sent to, and corresponding dns server carries out domain name mapping.
Receive IP address be 1.1.1.1 dns server reply back message after, obtain the resolving information carried in this back message, this resolving information is then the IP address corresponding with domain name " www.***.com ", supposes that this IP address is 7.7.7.7.Afterwards, this IP address 7.7.7.7 is informed the application program of sending domain name analysis request, to make it can access destination network www.***.com.
In addition, the resolving information 7.7.7.7 corresponding with domain name " www.***.com " obtained can also be saved to home domain name and cushion in list item, during resolving information corresponding to this domain name of follow-up acquisition, domain name mapping need not be carried out by dns server again.
In sum, domain name analytic method provided by the invention, by the resolving information parsed being saved in described home domain name buffering list item, so that when subsequently received domain name mapping request, if check in home domain name buffering list item have the resolving information corresponding with it, the resolving information that can obtain this correspondence returns to application program as analysis result.。Such as, when not using domain name analytic method of the present invention, that is, the domain name of having resolved is not saved to the situation of home domain name buffering list item, carrying out one parsing to www.letv.com needs 25 milliseconds usually, but, after using domain name analytic method of the present invention, carrying out domain name mapping to www.letv.com is then 0 millisecond, as can be seen here, the present invention effectively can save the time of domain name mapping, and then promotes the access speed of network.
The present invention also provides a kind of domain name mapping device, Fig. 4 is the structural representation of this domain name mapping device, this device can be applied in the network equipment, and this domain name mapping device can comprise formation inspector part 401, information acquisition unit 402 and domain name buffer cell 403, wherein:
Formation inspector part 401, for obtaining domain name mapping request, and checks in described home domain name buffering list item whether have the resolving information corresponding with the domain name of carrying in domain name analysis request;
Information acquisition unit 402, when having the resolving information corresponding with the domain name of carrying in domain name analysis request for cushioning in list item in the described home domain name of inspection, obtains resolving information corresponding with domain name in described home domain name buffering list item;
Domain name buffer cell 403, for when checking resolving information not corresponding with the domain name of carrying in domain name analysis request in described home domain name buffering list item, domain name analysis request is sent to domain name resolution server and carries out domain name mapping, and obtain after carrying out domain name mapping and the resolving information corresponding to domain name in domain name analysis request, described resolving information is saved in described home domain name buffering list item.
Further, described device can also comprise address setting unit 404, for the address information of the domain name resolution server preserved in the system property of the described network equipment is set to local loopback address, be described local loopback address to make the destination address in the domain name mapping request of acquisition.
Further, domain name buffer cell 403 specifically may be used for searching the address information of the domain name resolution server corresponding to being connected with the network of current use in the address information list item of the domain name resolution server preserved in advance, and domain name analysis request is sent to corresponding domain name resolution server and carries out domain name mapping by the address information of the domain name resolution server corresponding to connecting according to the network of described and current use.
Further, described device can also comprise network detecting unit 405, for when the disconnection connected to the network of the described network equipment being detected, delete the address information of the domain name resolution server of the correspondence all connected to the network prestored in the address information list item of domain name resolution server.
Particularly, the address information of dns server in the system property of intelligent television can be set to local loopback address, such as 127.0.0.1 by address setting unit 404 in the present invention in advance.
At the application program access destination network of intelligent television, need to the request of dns server sending domain name analysis to carry out domain name mapping time, the destination address of its domain name mapping request generated is then this local loopback address, and, also carry the port numbers of dns server in this domain name mapping request.
Local loopback address at the destination address of domain name mapping request, and when carrying the port numbers of dns server, can first by formation inspector part 401 according to the domain name of carrying in this domain name mapping request, prestore home domain name buffering list item in search whether there be the resolving information corresponding with this domain name.
Wherein, this home domain name buffering list item prestored carried out the domain name of domain name mapping and the corresponding relation of resolving information for preserving.
If there is the resolving information corresponding with the domain name of carrying in domain name mapping request in home domain name buffering list item, illustrate and domain name mapping was carried out to this domain name.So, this can be pre-stored in corresponding resolving information in the domain name buffering list item of local storage (buffering area of internal memory) and return to the application program of request domain name analysis by information acquisition unit 402, to make this application program communicate with objective network, and carry out domain name mapping without the need to again this domain name mapping request being sent to dns server.
In the present invention, the address information list item of default domain name resolution server can also be preserved in memory (buffering area of internal memory), preserve the network used in the address information list item of this domain name resolution server and connect the address information with corresponding domain name resolution server.
Under initial situation, or when resolving the domain name in domain name mapping request first, formation inspector part 401 then cannot find corresponding resolving information in this domain name buffering list item.So domain name buffer cell 403 can be connected with the extraneous network used that communicates according to current intelligent television, search in the address information list item of the domain name resolution server prestored in this locality and connect corresponding dns server address with presently used network, and domain name mapping request sent to corresponding dns server to carry out domain name mapping.
Receive this correspondence dns server reply receive the response after, domain name buffer cell 403 obtain this receive the response in resolving information, this resolving information is then the IP address of the objective network drawn after dns server is resolved the domain name in domain name mapping request.Afterwards, this back message is sent to the application system of request access objective network, communicate with objective network to make this application program.This resolving information is saved in home domain name buffering list item, during resolving information corresponding to this domain name of follow-up acquisition, domain name mapping need not be carried out by dns server more simultaneously.Thus, the present invention effectively can save the time of domain name mapping, promotes the access speed of network.
In addition, the present invention is applied to the domain name mapping device of the network equipment can be consistent with the handling process of above-mentioned domain name analytic method in concrete handling process, do not repeat them here.
Said apparatus can pass through software simulating, also hardware implementing can be passed through, the hardware structure schematic diagram of the domain name mapping device place of the present invention network equipment all can with reference to shown in figure 5, its basic hardware environment comprises central processor CPU, forwarding chip, memory and other hardware, wherein memory device comprises machine readable instructions, and CPU reads and performs the function that machine readable instructions performs each unit in Fig. 4.
As can be seen from the execution mode of above various method and apparatus, domain name analytic method provided by the invention and device, by the resolving information parsed being saved in described home domain name buffering list item, so that when subsequently received domain name mapping request, if check in home domain name buffering list item have the resolving information corresponding with it, the resolving information that can obtain this correspondence returns to application program as analysis result, and then saves the time of domain name mapping, promotes the access speed of network.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (8)
1. a domain name analytic method, is applied to the network equipment, it is characterized in that, described method comprises:
Obtain domain name mapping request, and check in home domain name buffering list item whether have the resolving information corresponding with the domain name of carrying in domain name analysis request;
If have, obtain resolving information corresponding with domain name in described home domain name buffering list item;
Otherwise, domain name analysis request is sent to domain name resolution server and carries out domain name mapping, and obtain after carrying out domain name mapping and the resolving information corresponding to domain name in domain name analysis request, described resolving information is saved in described home domain name buffering list item.
2. method according to claim 1, is characterized in that, described method comprises:
The address information of the domain name resolution server preserved in the system property of the described network equipment is set to local loopback address, is described local loopback address to make the destination address in the domain name mapping request of acquisition.
3. method according to claim 1, is characterized in that, the described domain name resolution server that domain name analysis request is sent to carries out domain name mapping and specifically comprises:
In the address information list item of the domain name resolution server preserved in advance, search the address information of the domain name resolution server corresponding to being connected with the network of current use, domain name analysis request is sent to corresponding domain name resolution server and carries out domain name mapping by the address information of the domain name resolution server corresponding to connecting according to the network of described and current use.
4. method according to claim 3, is characterized in that, described method comprises:
When the disconnection connected to the network of the described network equipment being detected, delete the address information of the domain name resolution server of the correspondence all connected to the network prestored in the address information list item of domain name resolution server.
5. a domain name mapping device, is applied to the network equipment, it is characterized in that, described device comprises:
Formation inspector part, for obtaining domain name mapping request, and checks in described home domain name buffering list item whether have the resolving information corresponding with the domain name of carrying in domain name analysis request;
Information acquisition unit, when having the resolving information corresponding with the domain name of carrying in domain name analysis request for cushioning in list item in the described home domain name of inspection, obtains resolving information corresponding with domain name in described home domain name buffering list item;
Domain name buffer cell, for when checking resolving information not corresponding with the domain name of carrying in domain name analysis request in described home domain name buffering list item, domain name analysis request is sent to domain name resolution server and carries out domain name mapping, and obtain after carrying out domain name mapping and the resolving information corresponding to domain name in domain name analysis request, described resolving information is saved in described home domain name buffering list item.
6. device according to claim 5, is characterized in that, described device comprises:
Address setting unit, for the address information of the domain name resolution server preserved in the system property of the described network equipment is set to local loopback address, is described local loopback address to make the destination address in the domain name mapping request of acquisition.
7. device according to claim 5, is characterized in that, domain name buffer cell specifically for:
In the address information list item of the domain name resolution server preserved in advance, search the address information of the domain name resolution server corresponding to being connected with the network of current use, domain name analysis request is sent to corresponding domain name resolution server and carries out domain name mapping by the address information of the domain name resolution server corresponding to connecting according to the network of described and current use.
8. device according to claim 7, is characterized in that, described device comprises:
Network detecting unit, for when the disconnection connected to the network of the described network equipment being detected, deletes the address information of the domain name resolution server of the correspondence all connected to the network prestored in the address information list item of domain name resolution server.
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