CN102739811B - The method and apparatus of domain name mapping - Google Patents
The method and apparatus of domain name mapping Download PDFInfo
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- CN102739811B CN102739811B CN201110087298.0A CN201110087298A CN102739811B CN 102739811 B CN102739811 B CN 102739811B CN 201110087298 A CN201110087298 A CN 201110087298A CN 102739811 B CN102739811 B CN 102739811B
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Abstract
The invention discloses a kind of method and apparatus of domain name mapping, the method comprises: home domain name analysis service dns server, to the request of network side dns server sending domain name analysis, receives the all-IP address list that described network side dns server sends; Described local dns server selects IP address in net from described all-IP address list; The IP address list that described local dns server receives from IDC administrative center of Internet data center according to IP address lookup in described net, obtains the ability information of IP address in net; Described local dns server selects IP address in net according to the ability information of IP address in net.In the embodiment of the present invention, local dns server receives the all-IP address list that network side dns server sends, and therefrom selects IP address in net to send to user terminal, makes user terminal can access optimum website.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method and apparatus of domain name mapping.
Background technology
At IP (InternetProtocol, Internet protocol) in network, the major function of DNS (DomainNameService, domain name service) is changed with the discernible IP address of network the domain name (DomainName) being easy to people's memory.Conversion between domain name and IP address is called domain name mapping, and the network host of execution domains name analysis is called dns server.
In prior art, DNS provides three kinds of domain name mapping modes: local search, caching query and iterative query.Concrete, if the access user of certain ISP (InternetServiceProvider, ISP) inputs certain website domain name in a browser, then access user initiated domain name analysis request, wherein carries this website domain name; The dns server (being commonly referred to as local dns server) of this ISP receives this domain name mapping request, first performs local search, in home domain name database, namely inquire about IP address corresponding to this website domain name.The home domain name of this dns server of ownership parsing and the corresponding relation of IP address is stored in home domain name database.If this website domain name is home domain name, then the IP address inquired directly is returned to access user by local dns server; If this website domain name is not home domain name, local dns server then performs caching query, query parse record (generally preserving non-local domain name parsed by iterative query mode in nearest a period of time and the IP address of correspondence thereof with the form of separating new record in buffer memory) in the buffer memory of this dns server, if there is the solution new record that this website domain name is relevant in the buffer, then the IP address inquired directly is returned to access user by local dns server.If the solution new record that this website domain name is not relevant in the buffer, local dns server finally performs iterative query, and namely superior dns server inquires about IP address corresponding to this website domain name step by step.
Resource major part in operator's net leaves in IDC (InternetDataCenter, Internet data center).Resource in each IDC is rented by some ICP (ICP), and the frame, rack, power supply, IP address etc. of an IDC machine room are rented by such as A company.In prior art, the domain name mapping function of A company's site combines realization by GSLB (GSLB module) and own authoritative domain name server two network elements.
Assuming that the domain name of A company is www.A.com, its domain name resolution process comprises:
1, end-user access www.A.com.
2, local dns server as without buffer memory or mandate, then iterative query, till access A company has authorized DNS server by oneself.
3, A company has authorized DNS server by oneself is redirected to GSLB by request, by the IP address of GSLB according to user, go out a best accessing points according to close (IP address and the geographical close providing source IP address) Selecting parameter, and send to local dns server in the mode of DNS response message.
4, DNS response message is sent to user by local dns server.
5, user is according to the IP address access www.A.com in response message.
Above-mentioned domain name resolution process depends on GSLB and select best IP address from multiple IP address, but in prior art, most of ICP does not possess GSLB, causes terminal cannot obtain optimum IP address, can not access optimum website.
Summary of the invention
Embodiments provide a kind of method and apparatus of domain name mapping, local dns server is the optimum website that user selects website.
Embodiments provide a kind of method of domain name mapping, comprising:
Home domain name analysis service dns server, to the request of network side dns server sending domain name analysis, receives the all-IP address list that described network side dns server sends;
Described local dns server selects IP address in net from described all-IP address list;
The IP address list that described local dns server receives from IDC administrative center of Internet data center according to IP address lookup in described net, obtains the ability information of IP address in net;
Described local dns server selects IP address in net according to the ability information of IP address in net.
Embodiments provide a kind of method of domain name mapping, comprising:
IDC administrative center of Internet data center receives the statistics that IDC Flow Control headend equipment sends, and this statistics is carried out statistics by described IDC Flow Control headend equipment according to the analysis result of the message to inflow and/or outflow IDC and obtained;
Described IDC administrative center generates IP address list according to described statistics, and described IP address list is sent to local dns server, make described local dns server select the IP address corresponding with domain name mapping request according to the ability information of IP address in described IP address list.
Embodiments provide a kind of dns server, comprising:
Transmitting element, for the request of network side dns server sending domain name analysis;
Receiving element, for receiving the all-IP address list that described network side dns server sends;
First screening unit, for selecting IP address in net from described all-IP address list;
Query unit, for the IP address list received from IDC administrative center of Internet data center according to IP address lookup in described net, obtains the ability information of IP address in net;
Second screening unit, for selecting IP address in net according to the ability information of IP address in net.
Embodiments provide a kind of IDC administrative center, comprising:
Receiving element, for receiving the statistics that IDC Flow Control headend equipment sends, this statistics is carried out statistics by described IDC Flow Control headend equipment according to the analysis result of the message to inflow and/or outflow IDC and is obtained;
List generation unit, for generating IP address list according to described statistics;
Transmitting element, for being sent to local dns server by described IP address list, makes described local dns server select IP address according to the ability information of the IP address of described IP address list.
Compared with prior art, the embodiment of the present invention at least has the following advantages:
Local dns server receives the all-IP address list that network side dns server sends, and therefrom selects IP address in net to send to user terminal, makes user terminal can access optimum website.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiments of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiments of the invention or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the network system schematic diagram of the domain name mapping that the present embodiment provides;
Fig. 2 is the schematic flow sheet of the method for the domain name mapping that the embodiment of the present invention one provides;
Fig. 3 is the formation schematic diagram of the IDC Flow Control headend equipment that the embodiment of the present invention one provides;
Fig. 4 is the schematic flow sheet of the method for the domain name mapping that the embodiment of the present invention two provides;
Fig. 5 is the structural representation of the dns server that the embodiment of the present invention three provides;
Fig. 6 is the structural representation of the IDC administrative center that the embodiment of the present invention four provides.
Embodiment
Below in conjunction with the accompanying drawing in embodiments of the invention, be clearly and completely described the technical scheme in embodiments of the invention, obviously, the embodiments described below are only the present invention's part embodiments, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of embodiments of the invention protection.
Embodiment one
Present embodiments provide a kind of method of domain name mapping, be applied to network system as shown in Figure 1, this network system comprises user terminal, local dns server, Wang Nei IDC administrative center, each IDC and network side dns server.
For convenience of description, following network side dns server is for ICP authorized DNS server.
The detailed process of the method as shown in Figure 2, comprising:
Step 201, local dns server receives Client-initiated request, if having corresponding message in local cache and database, directly feeds back, otherwise by the mode by recurrence to the request of ICP authorized DNS server.
Step 202, local dns server receives the all-IP address list that ICP authorized DNS server sends.
Step 203, local dns server judges whether to comprise in all-IP address list IP address in net, if not, direct all-IP address list is fed back to user terminal, allows user terminal go extranet access; Otherwise, perform step 204.
Step 204, local dns server has judged whether IP address in multiple net, if it is performs step 205; Otherwise, IP address in current net is sent to user terminal.
Step 205, local dns server inquires about the IP address list obtained from IDC administrative center, selects IP address in net to send to user terminal according to the ability information of IP address in net.
Concrete, the IDC at ICP place comprises IDC Flow Control headend equipment, and the message of this IDC Flow Control headend equipment to inflow and/or outflow IDC resolves the ability information obtaining IP address.The unification of the data of statistics, by remote interface, is sent to IDC administrative center and gathers by each IDC Flow Control headend equipment.IDC administrative center receives the ability information of the IP address that IDC Flow Control headend equipment sends, and the ability information according to IP address generates IP address list and sends to local dns server.Local dns server receives and stores this IP address list.IP address list can initiatively send to local dns server by IDC administrative center, and the such as cycle sends.Also can be that local dns server sends request to IDC administrative center, IDC administrative center sends IP address list according to this request to local dns server.
Wherein, the formation of IDC Flow Control headend equipment as shown in Figure 3, comprises DPI (DeepPacketInspection, deep-packet detection) equipment and Analysis server two parts.DPI equipment packet-by-packet can be resolved all bags of inflow and/or outflow IDC.URL information is contained in the application layer of bag, just containing the network address that we commonly use in this information, i.e. domain-name information, as www.A.com, the network layer packet of this bag contains source, object IP address information, and DPI device parses bag obtains the corresponding relation of domain name and IP address.DPI equipment can also resolve the ability information obtaining IP address, such as, IP address when a user surfs the Net is 1.1.1.1, the IP address of webpage in IDC of access is 2.2.2., so DPI equipment can do two of an one-in-and-one-out bag and mate, just know that this is the process of an access, therefrom obtain the time difference, namely in the access time delay that IDC inside occurs.DPI equipment can also to the statistics of the number of dropped packets of IP address, when a bag of user have passed through DPI equipment, DPI equipment does not receive respond packet within a period of time, and user's bag just now repeats again to have sent for a moment, just can think to there occurs packet loss, can record packet loss+1 be carried out.Similar also can count delay variation parameter.
A statistic record is listed in the access of DPI equipment to each user, and statistic record is sent to Analysis server.Analysis server carries out subsequent treatment to the data that DPI equipment is uploaded, and comprises and gathering for different web sites, gather for different operators, gathers for specific user, and the principle gathered customizes according to actual needs in advance.The long and that converges can store with the form of form.
Summarized results is sent to IDC administrative center by Analysis server timing or not timing.The summarized results that IDC administrative center can upload each IDC again gathers, classifies, thus obtains the ability information of each IP address, and the corresponding relation of domain name and IP address.
In the embodiment of the present invention, because dns server only needs the ability information using IP address to select IP address in optimum net, therefore, in the present embodiment, IDC administrative center can not manage the corresponding relation of IP address and domain name, accordingly, IDC Flow Control headend equipment can not the domain name of analytic message.
Embodiment two
Present embodiments provide a kind of method of domain name mapping, be applied to network system as shown in Figure 1, this network system comprises user terminal, local dns server, network side dns server, Wang Nei IDC administrative center and each IDC.For convenience of description, following network side dns server is for ICP authorized DNS server.
The detailed process of the method as shown in Figure 4, comprising:
Step 401, local dns server receives Client-initiated request, if having corresponding message in local cache and database, directly feeds back, otherwise by the mode by recurrence to the request of ICP authorized DNS server.
Step 402, local dns server receives the all-IP address list that ICP authorized DNS server sends.
Step 403, local dns server judges the address whether comprised in all-IP address list in net, if not, direct full list is fed back to user terminal, allows user go extranet access; Otherwise, perform step 404.
Step 404, local dns server inquires about the IP address list obtained from IDC administrative center, obtains IP address in net corresponding with domain name mapping request in IP address list; Whether the IP address relatively obtained is consistent with IP address in the net in all-IP address list; Step 405 is performed if consistent; Otherwise perform step 407.
Step 405, local dns server has judged whether IP address in multiple net, if it is performs step 406; Otherwise, IP address in current net is sent to user terminal.
Step 406, local dns server inquires about the IP address list obtained from IDC administrative center, selects IP address in optimum net to send to user terminal according to the ability information of IP address in net.
Step 407, local dns server uses IP address in the net in the IP address renewal all-IP address list obtained, if IP address is multiple in the net after upgrading, local dns server obtains the ability information of multiple IP address further, selects IP address in optimum net to send to user terminal; If IP address is 1 in the net after upgrading, this 1 IP address sends to user terminal by local dns server.
Concrete, the IDC at ICP place comprises IDC Flow Control headend equipment, and the function of this IDC Flow Control headend equipment is with described in embodiment one.
It should be noted that, when the IDC resource of ICP in netting changes, the IP address of such as sports channel and channel for finance and economics exchanges, and the authoritative domain name server of ICP does not make renewal in time.The domain name now sent according to ICP authoritative domain name server and the matched rule of IP address, may will bring the situation of access by mistake.In this case, IDC administrative center can monitor the corresponding relation of correct domain name and IP address, and monitoring result is sent to local dns server, makes local dns server have error correction.
In another kind of situation, though website is introduced be mirrored to IDC in net, be not configured in ICP authoritative domain name system, i.e. IP address list in the authoritative domain name server of ICP not exclusively, even if cause resource cannot be accessed in net yet.In this case, because IDC Flow Control headend equipment monitors the corresponding relation of all domain names and IP address, corresponding relation website being introduced resource and IP address uploads to IDC administrative center, and therefore IDC administrative center can monitor the corresponding relation of all domain names and IP address.Local dns server in the process doing IP address sort once detect net in IP address do not add needs sort list in, will automatically add.
The error correction of local dns server can also be realized by another kind of mode, such as, requires that IDC is to IDC Flow Control headend equipment feedback website record information, and record information comprises the corresponding relation of website domain name, sub-channel domain name and IP address.When website puts appearance variation on record, need upgrade in time record information.After exchanging in the channel for finance and economics (1.1.1.1) of website A, sports channel (2.2.2.2): channel for finance and economics becomes (2.2.2.2), and sports channel becomes (1.1.1.1), can record this message by website record information.Record information is sent to IDC administrative center by IDC Flow Control headend equipment.Record information is synchronized to local dns by IDC administrative center.Local dns carries out the error correction of IP address accordingly.Accordingly, local dns server can also detect the IP address in the list not adding needs sequence according to this mode of putting on record, and automatically adds list.
Based on the technical conceive identical with said method embodiment, the present invention also provides following apparatus embodiment.
Embodiment three
Present embodiments provide a kind of dns server, as shown in Figure 5, comprising:
Transmitting element 11, for the request of network side dns server sending domain name analysis;
Receiving element 12, for receiving the all-IP address list that described network side dns server sends;
First screening unit 13, for selecting IP address in net from described all-IP address list;
Query unit 14, for the IP address list received from IDC administrative center of Internet data center according to IP address lookup in described net, obtains the ability information of IP address in net;
Second screening unit 15, for selecting IP address in net according to the ability information of IP address in net.
Described query unit 14 also for:
In described IP address list, search IP address in described net, obtain the ability information corresponding with IP address in the net found; Or
Obtain IP address in net corresponding with domain name analysis request in described IP address list, when IP address is inconsistent in the IP address obtained and described net, then use the IP address of acquisition to upgrade IP address in described net; If IP address is multiple in the net after upgrading, obtain the ability information of described multiple IP address further.
Also comprise:
List acquiring unit 16, for sending request to described IDC administrative center, obtains the IP address list that described IDC administrative center carries in response message; Or receive the IP address list of transmission of described IDC administrative center cycle.
Embodiment four
Present embodiments provide IDC administrative center of a kind of Internet data center, as shown in Figure 6, comprising:
Receiving element 21, for receiving the statistics that IDC Flow Control headend equipment sends, this statistics is carried out statistics by described IDC Flow Control headend equipment to the analysis result of message flowed into and/or flow out IDC and is obtained;
List generation unit 22, for generating IP address list according to described statistics;
Transmitting element 23, for being sent to local dns server by described IP address list, makes described local dns server select IP address according to the ability information of the IP address of described IP address list.
Described statistics comprises the corresponding relation of the ability information of IP address or the ability information of IP address and domain name and IP address;
Described list generation unit 22 also for: according to the corresponding relation of the ability information of described IP address or the ability information of IP address and domain name and IP address, generate the IP address list comprising the ability information of the ability information of IP address or the corresponding relation of domain name and IP address and IP address.
In the embodiment of the present invention, local dns server receives the all-IP address list that ICP has authorized DNS server transmission by oneself, and therefrom select IP address in optimum net to send to user terminal, the access improving user is experienced.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1. a method for domain name mapping, is characterized in that, comprising:
Home domain name analysis service dns server, to the request of network side dns server sending domain name analysis, receives the all-IP address list that described network side dns server sends;
Described local dns server selects IP address in net from described all-IP address list;
The IP address list that described local dns server receives from IDC administrative center of Internet data center according to IP address lookup in described net, obtains the ability information of IP address in net;
Described local dns server selects IP address in net according to the ability information of IP address in net;
Wherein, described local dns server also comprises before inquiring about the IP address list received from IDC administrative center of Internet data center:
Described IDC administrative center receives the ability information of the IP address that IDC Flow Control headend equipment sends, generate IP address list according to the ability information of described IP address, the ability information of described IP address is carried out parsing by described IDC Flow Control headend equipment to the message flowed into and/or flow out IDC and is obtained.
2. the method for claim 1, it is characterized in that, described IDC Flow Control headend equipment, by resolving to the message of inflow and/or outflow IDC the corresponding relation also obtaining domain name and IP address, also comprises the corresponding relation of domain name and IP address in the IP address list that described IDC administrative center generates;
The IP address list that described local dns server receives from IDC administrative center of Internet data center according to IP address lookup in described net, the ability information obtaining IP address in net comprises:
Described local dns server searches IP address in described net in described IP address list, obtains the ability information corresponding with IP address in the described net found; Or
Described local dns server obtains IP address in net corresponding with domain name analysis request in described IP address list, when IP address is inconsistent in the IP address obtained and described net, then uses the IP address of acquisition to upgrade IP address in described net; If IP address is multiple in the net after upgrading, described local dns server obtains the ability information of described multiple IP address further.
3. the method as described in any one of claim 1-2, is characterized in that, described local dns server receives IP address list from IDC administrative center of Internet data center and comprises:
Described local dns server sends request to described IDC administrative center, obtains the IP address list that described IDC administrative center carries in response message; Or
Described local dns server receives the IP address list of transmission of described IDC administrative center cycle.
4. a method for domain name mapping, is characterized in that, comprising:
IDC administrative center of Internet data center receives the statistics that IDC Flow Control headend equipment sends, and this statistics is carried out statistics by described IDC Flow Control headend equipment to the analysis result of message flowed into and/or flow out IDC and obtained;
Described IDC administrative center generates IP address list according to described statistics, and described IP address list is sent to local dns server, make described local dns server select the IP address corresponding with domain name mapping request according to the ability information of IP address in described IP address list;
Wherein, described statistics comprises the ability information of the ability information of IP address or the corresponding relation of domain name and IP address and IP address, comprises the ability information of the ability information of IP address or the corresponding relation of domain name and IP address and IP address in the IP address list that described IDC administrative center generates.
5. a dns server, is characterized in that, comprising:
Transmitting element, for the request of network side dns server sending domain name analysis;
Receiving element, for receiving the all-IP address list that described network side dns server sends;
First screening unit, for selecting IP address in net from described all-IP address list;
Query unit, for the IP address list received from IDC administrative center of Internet data center according to IP address lookup in described net, obtains the ability information of IP address in net;
Second screening unit, for selecting IP address in net according to the ability information of IP address in net;
Wherein, described IP address list is after described IDC administrative center receives the ability information of the IP address that IDC Flow Control headend equipment sends, generate according to the ability information of described IP address, the ability information of described IP address is carried out parsing by described IDC Flow Control headend equipment to the message flowed into and/or flow out IDC and is obtained.
6. dns server as claimed in claim 5, is characterized in that, described query unit also for:
In described IP address list, search IP address in described net, obtain the ability information corresponding with IP address in the net found; Or
Obtain IP address in net corresponding with domain name analysis request in described IP address list, when IP address is inconsistent in the IP address obtained and described net, then use the IP address of acquisition to upgrade IP address in described net; If IP address is multiple in the net after upgrading, obtain the ability information of described multiple IP address further.
7. the dns server as described in claim 5 or 6, is characterized in that, also comprises:
List acquiring unit, for sending request to described IDC administrative center, obtains the IP address list that described IDC administrative center carries in response message; Or receive the IP address list of transmission of described IDC administrative center cycle.
8. an Internet data center IDC administrative center, is characterized in that, comprising:
Receiving element, for receiving the statistics that IDC Flow Control headend equipment sends, this statistics is carried out statistics by described IDC Flow Control headend equipment to the analysis result of message flowed into and/or flow out IDC and is obtained;
List generation unit, for generating IP address list according to described statistics;
Transmitting element, for being sent to local dns server by described IP address list, makes described local dns server select IP address according to the ability information of the IP address of described IP address list;
Wherein, described statistics comprises the ability information of the ability information of IP address or the corresponding relation of domain name and IP address and IP address;
Described list generation unit also for: according to the corresponding relation of the ability information of described IP address or the ability information of IP address and domain name and IP address, generate the IP address list comprising the ability information of the ability information of IP address or the corresponding relation of domain name and IP address and IP address.
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| CN101820451A (en) * | 2009-02-26 | 2010-09-01 | 上海数讯信息技术有限公司 | Dynamic domain name service optimizing system |
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