CN108574744A - Domain name resolution method, device, electronic device and readable storage medium - Google Patents

Abstract

An embodiment of the present invention provides a kind of domain name analytic method, device, electronic equipment and readable storage medium storing program for executing, wherein the method includes：Obtain the domain name carried in the domain name mapping request message that local dns server is sent and source IP address, according to domain name, the inquiry domain name mapping information corresponding with domain name in presetting privately owned mapping table, when inquiring domain name mapping information corresponding with domain name, the resolution response message that transmission carries domain name mapping information gives the corresponding local dns server of source IP address.A kind of domain name analytic method, device, electronic equipment and the readable storage medium storing program for executing provided through the embodiment of the present invention, it may be implemented directly to be resolved to domain name mapping information by domain name, domain name mapping is asked to carry out fine granularity parsing, domain name mapping accuracy is improved, and reduces the time of parsing domain name consumption.

Description

Domain name resolution method, device, electronic device and readable storage medium

technical field

The invention relates to the technical field of computer network communication, in particular to a domain name resolution method, device, electronic equipment and readable storage medium.

Background technique

DNS (Domain Name System, Domain Name System), a distributed database on the Internet that maps domain names and IP (Internet Protocol, a protocol for interconnection between networks) addresses, enables users to access the Internet more conveniently without having to remember A string of IP numbers that can be read directly by a machine. The process of obtaining the IP address corresponding to the host name through the host name is called domain name resolution (or host name resolution), and the network host that performs domain name resolution is called a DNS server. Through the DNS server, the IP address of the required site or resource can be obtained, and then the site or resource can be accessed.

ICP (Internet Content Provider, Internet Content Provider) is based on the consideration of GSLB (Global Server Load Balance, global server load balancing). During the process of domain name resolution, it will schedule resolution requests to achieve load balancing.

In the prior art, in the process of ICP scheduling the resolution request, the common method is to schedule the resolution request according to the client IP (Internet Protocol, Internet Protocol) address or the IP address of the local DNS server requesting resolution .

For example, when an access user of an ISP (Internet Service Provider, Internet Service Provider) enters a website domain name in a browser, the access user initiates a domain name resolution request to the DNS server of the ISP (generally referred to as a local DNS server). , where the domain name resolution request carries the domain name of the website; it is assumed that the local DNS server has not found the resolution record corresponding to the domain name of the website in the local database and cache, nor has it queried in the DNS server of the root domain and the DNS server of the secondary domain If the resolution record corresponding to the domain name of the website is found, the local DNS server will initiate a domain name resolution request to the authoritative DNS server according to the IP address of the authoritative DNS server returned by the DNS server of the secondary domain, where the domain name resolution request carries the domain name of the website and the IP address of the local DNS server or the IP address of the access user.

After receiving the domain name resolution request, the authoritative DNS server queries the resolution record in the node corresponding to the IP address segment containing the local DNS server IP address or the IP address of the access user. The IP address segment corresponding to each IP address segment corresponds to an entry node, and the entry node also has a parent node, and the authoritative DNS server is in the entry node corresponding to the IP address segment and the parent node of the entry node Query, after finding the resolution record corresponding to the website domain name, add the resolution record to the DNS response message corresponding to the domain name resolution request, and return it to the access user.

However, since each node in the authoritative DNS server corresponds to a pre-divided IP address segment, the granularity of the IP address is relatively coarse. When the entry node corresponding to the IP address segment or the parent node of the entry node fails, domain name resolution will be caused. The results are biased, reducing the accuracy of domain name resolution. Wherein, the IP address granularity indicates the fineness of IP address division.

Contents of the invention

The purpose of the embodiment of the present invention is to provide a domain name resolution method, device, electronic equipment and readable storage medium, so as to implement fine-grained resolution of resolution requests and improve the accuracy of domain name resolution. The specific technical scheme is as follows:

In the first aspect, the embodiment of the present invention provides a domain name resolution method, the method comprising:

Obtain the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, where the source IP address includes the local DNS server IP address;

According to the domain name, the domain name resolution information corresponding to the domain name is queried in the preset private mapping table, wherein the domain name and domain name resolution information corresponding to the domain name are stored in the preset private mapping table, and the domain name resolution information includes: the resolution type corresponding to the domain name and The resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and saved in the preset private mapping table;

When the domain name resolution information corresponding to the domain name is queried, a resolution response message carrying the domain name resolution information is sent to the local DNS server corresponding to the source IP address.

Optionally, obtain the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, including:

Obtain the domain name resolution request message sent by the local DNS server, and detect whether the domain name resolution request message has a flag bit;

When the domain name resolution request message has no flag bit, obtain the local DNS server IP address and domain name carried in the domain name resolution request message;

When the domain name resolution request message has a flag bit, obtain the client IP address, domain name and local DNS server IP address carried in the domain name resolution request message.

Optionally, multiple first IP address segments are also stored in the preset private mapping table. According to the domain name, query the domain name resolution information corresponding to the domain name in the preset private mapping table, including:

Obtain a plurality of first IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the first IP address segment is a collection of multiple local DNS server IP addresses;

Among the plurality of first IP address segments, determining that the first IP address segment corresponding to the IP address of the local DNS server is the first target IP address segment;

The domain name resolution information corresponding to the first target IP address segment in the preset private mapping table is determined as the domain name resolution information corresponding to the domain name.

Optionally, the first IP address segment is an IP address segment divided according to geographical location, or an IP address segment divided according to service of the service server.

Optionally, multiple second IP address segments are stored in the preset private mapping table. According to the domain name, the domain name resolution information corresponding to the domain name is queried in the preset private mapping table, including:

Obtaining multiple second IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the second IP address segment is a collection of multiple client IP addresses;

Among the plurality of second IP address segments, determining that the second IP address segment corresponding to the client IP address is the second target IP address segment;

The domain name resolution information corresponding to the second target IP address segment in the preset private mapping table is determined as the domain name resolution information corresponding to the domain name.

Optionally, the above resolution types may include: address record, canonical name record, mail exchange record or resolution server record;

The above resolution value may include: the IP address of the website server, the IP address of the mail server or the IP address of the resolution server.

Optionally, before obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, the domain name resolution method in the embodiment of the present invention further includes:

Obtain domain names, domain name resolution information, multiple first IP address segments or multiple second IP address segments, where the first IP address segment is a collection of multiple local DNS server IP addresses, and the second IP address segment is a collection of multiple client IP addresses A collection of endpoint IP addresses;

Establish a preset private mapping table corresponding to domain name and domain name resolution information, multiple first IP address segments, or establish a preset private mapping table corresponding to domain name and domain name resolution information, and multiple second IP address segments.

Optionally, the preset private mapping table includes a status identifier, and the status identifier is used to distinguish the preset private mapping table.

In the second aspect, the embodiment of the present invention also provides a domain name resolution device, which includes:

The first obtaining module is used to obtain the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, wherein the source IP address includes the local DNS server IP address;

The resolution module is used to query the domain name resolution information corresponding to the domain name in the preset private mapping table according to the domain name, where the domain name and domain name resolution information corresponding to the domain name are stored in the preset private mapping table, and the domain name resolution information includes: The resolution type corresponding to the domain name and the resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and saved in the preset private mapping table;

The response module is configured to send a resolution response message carrying the domain name resolution information to the local DNS server corresponding to the source IP address when the domain name resolution information corresponding to the domain name is queried.

Optionally, the first acquisition module is specifically used for:

Obtain the domain name resolution request message sent by the local DNS server, and detect whether the domain name resolution request message has a flag bit; when the domain name resolution request message does not have a flag bit, obtain the local DNS server IP address and Domain name; when the domain name resolution request message has a flag bit, obtain the client IP address, domain name and local DNS server IP address carried in the domain name resolution request message.

Optionally, a plurality of first IP address segments and parsing modules are also stored in the preset private mapping table, including:

The first obtaining submodule is used to obtain a plurality of first IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the first IP address segment is a collection of multiple local DNS server IP addresses;

The first determination submodule is used to determine, among the plurality of first IP address segments, that the first IP address segment corresponding to the IP address of the local DNS server is the first target IP address segment;

The first resolution sub-module is configured to determine domain name resolution information corresponding to the first target IP address segment in the preset private mapping table as domain name resolution information corresponding to the domain name.

Optionally, the first IP address segment is an IP address segment divided according to geographical location, or an IP address segment divided according to service of the service server.

Optionally, multiple second IP address segments are also stored in the preset private mapping table, and the parsing module also includes:

The second obtaining submodule is used to obtain multiple second IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the second IP address segment is a collection of multiple client IP addresses;

The second determination module is configured to determine, among the plurality of second IP address segments, that the second IP address segment corresponding to the client IP address is the second target IP address segment;

The second resolution sub-module is configured to determine domain name resolution information corresponding to the second target IP address segment in the preset private mapping table as domain name resolution information corresponding to the domain name.

Optionally, the above resolution types may include: address record, canonical name record, mail exchange record or resolution server record;

The above resolution value may include: the IP address of the website server, the IP address of the mail server or the IP address of the resolution server.

Optionally, the domain name resolution device in the embodiment of the present invention further includes:

The preset private mapping table establishment module is used to obtain the domain name, domain name resolution information, multiple first IP address segments or multiple second IP address segments, and establish a preset mapping table corresponding to the domain name and domain name resolution information, and multiple first IP address segments. Set up a private mapping table, or establish a domain name and domain name resolution information, and a preset private mapping table corresponding to multiple second IP address segments, wherein the first IP address segment is a collection of multiple local DNS server IP addresses, and the second IP address A segment is a collection of multiple client IP addresses.

Optionally, the preset private mapping table includes a status identifier, and the status identifier is used to distinguish the preset private mapping table.

In the third aspect, the embodiment of the present invention also provides an electronic device, which is characterized in that it includes a processor and a machine-readable storage medium, the machine-readable storage medium stores machine-executable instructions that can be executed by the processor, and the processor Prompted by machine-executable instructions: implementing the steps of a domain name resolution method provided in the first aspect above.

In the fourth aspect, the embodiment of the present invention also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the domain name resolution method provided in the above-mentioned first aspect is realized A step of.

In the fifth aspect, the embodiment of the present invention also provides a computer program product containing instructions, which, when run on a computer, causes the computer to execute the domain name resolution method provided in the first aspect above.

In the sixth aspect, the embodiment of the present invention also provides a computer program, which, when running on a computer, causes the computer to execute the domain name resolution method provided in the first aspect above.

According to the domain name resolution method, device, electronic device and readable storage medium provided by the embodiments of the present invention, the domain name resolution information corresponding to the domain name is queried in the preset private mapping table according to the domain name, and the domain name resolution information corresponding to the domain name is queried. When sending information, according to the source IP address, send the corresponding resolution message carrying the domain name resolution information to the local DNS server; it can directly resolve the domain name resolution information through the domain name, and perform fine-grained resolution on the domain name resolution request, improving the accuracy of domain name resolution , and reduce the time consumed by resolving domain names. Of course, implementing any product or method of the present invention does not necessarily need to achieve all the advantages mentioned above at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a domain name resolution method applied to a domain name resolution system according to an embodiment of the present invention;

FIG. 2 is a flowchart of a first implementation of a domain name resolution method according to an embodiment of the present invention;

FIG. 3 is a flowchart of a second implementation of a domain name resolution method according to an embodiment of the present invention;

FIG. 4 is a flowchart of a third implementation manner of a domain name resolution method according to an embodiment of the present invention;

FIG. 5 is a flowchart of a fourth implementation manner of a domain name resolution method according to an embodiment of the present invention;

6 is a schematic diagram of node division of a public DNS server of a domain name resolution method according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a domain name resolution device according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a domain name resolution method applied to an electronic device according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to solve the problems existing in the prior art, the embodiment of the present invention provides a domain name resolution method, device, electronic equipment and readable storage medium, so that the domain name resolution information can be directly resolved through the domain name, and fine-grained domain name resolution requests can be implemented. Analysis, improve the accuracy of domain name resolution.

First of all, a domain name resolution method, device, electronic device, and readable storage medium provided by the embodiment of the present invention can be applied to an authoritative DNS server, as shown in Figure 1, which is a domain name resolution method applied to domain name resolution Schematic diagram of the structure of the system; the domain name resolution system may include a local DNS server 102, a root domain DNS server 103, a secondary domain DNS server 104 and an authoritative DNS server 105, wherein the authoritative DNS server 105 is a domain name applying the embodiment of the present invention The DNS server for the resolution method.

When users visit a website, they can analyze the domain name of the target website through the DNS server system to obtain the IP address corresponding to the website server, and then send an access request to the website server with the IP address to realize access to the website.

When a user sends an e-mail, the domain name of the mail server of the target e-mail can be analyzed through the DNS server system, and the IP address of the mail server of the target e-mail can be obtained, and then the mail server with the IP address can send an e-mail to the target e-mail. mail.

Therefore, when the client 101 visits a website or sends an e-mail, it can first initiate a domain name resolution request to the local DNS server 102. After the local DNS server 102 receives the domain name resolution request, it can query The resolution record corresponding to the domain name, when no resolution record corresponding to the domain name is found, the local DNS server 102 may send a domain name resolution request carrying the domain name to the root domain DNS server 103, wherein the client 101 may be A personal computer, or a mobile device connected to the Internet.

When there is no domain name resolution record corresponding to the domain name in the root domain DNS server 103, the IP address of the secondary domain DNS server 104 corresponding to the domain name can be sent to the local DNS server 102, and the local DNS server 102 can send a domain name resolution request to The second-level domain DNS server 104 corresponding to the domain name requests the second-level domain DNS server 104 to resolve the domain name.

Specifically, the secondary domain DNS server 104 can query the resolution record corresponding to the domain name in its own cache, and when no resolution record corresponding to the domain name is found, the secondary DNS server 104 can send the application corresponding to the domain name The IP address of the authoritative DNS server 105 of the domain name resolution method in the embodiment of the present invention is given to the local DNS server 102 .

The local DNS server 102 may send a domain name resolution request to the authoritative DNS server 105 applying the domain name resolution method of the embodiment of the present invention. The authoritative DNS server 105 can apply the domain name resolution method of the embodiment of the present invention to resolve the domain name carried in the domain name resolution request sent by the local DNS server 102, and feed back the domain name resolution information corresponding to the domain name to the local DNS server 102. The local DNS server 102 returns the domain name resolution information to the client 101, so that the client 101 can access websites or send emails.

By applying the authoritative DNS server 105 of the domain name resolution method of the embodiment of the present invention to the domain name resolution system shown in FIG. Reduced the time spent on resolving domain names and improved the quality of domain name resolution.

Next, a method for resolving a domain name in an embodiment of the present invention is introduced, as shown in FIG. 2 , which is a flowchart of a first implementation of a method for resolving a domain name in an embodiment of the present invention. The method may include:

S201. Obtain the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server.

In some examples, the above-mentioned source IP address may include a local DNS server IP address, and the domain name may be the domain name of the target website entered by the user into the browser, or the domain name of the mail server of the target email address when sending an email.

In some examples, when the local DNS server sends a domain name resolution request to the authoritative DNS server, the domain name and source IP address can be added to the domain name resolution request message. The DNS server, after receiving the domain name resolution request message sent by the local DNS server, can obtain the domain name and source IP address from the domain name resolution request message, and the source IP address can be the IP address of the local DNS server.

For example, if the user enters the domain name "www.abc.com" in the browser, the local DNS server can send the domain name resolution request message carrying the domain name and the IP address of the local DNS server to the domain name application of the embodiment of the present invention. The authoritative DNS server for the resolution method. After receiving the domain name resolution request message, the authoritative DNS server can extract the domain name "www.abc.com" and the IP address of the local DNS server sending the domain name resolution request message from the domain name resolution request message.

S202, query domain name resolution information corresponding to the domain name in a preset private mapping table according to the domain name.

Among them, the default private mapping table stores the domain name and domain name resolution information corresponding to the domain name. The domain name resolution information includes: the resolution type corresponding to the domain name and the resolution value corresponding to the resolution type. The domain name resolution information is pre-configured and stored in the preset private In the mapping table, the domain name is the domain name requested to be resolved.

For example, the preset private mapping table may be pre-customized and established by the user, storing the domain names of different web servers and the domain name resolution information of the corresponding web servers, or storing the domain names of different mail servers and the corresponding mail server The domain name resolution information may also store domain names of different web servers and domain name resolution information of corresponding web servers, domain names of different mail servers and domain name resolution information of corresponding mail servers.

In some examples, when the domain names of different web servers and the domain name resolution information of the corresponding web servers are stored in the preset private mapping table, the resolution type in the domain name resolution information may be: A (Address, address) record, CNAME (Canonical Name, canonical name) record or NS (Name Server, resolution server) record.

The resolution value may include: the IP address of the website server or the IP address of the resolution server.

The domain name resolution information may also include: the host name of the website server, the host name of the resolution server, the survival time of the domain name resolution information or the description of the domain name setting of the website server.

In some examples, when the domain names of different mail servers and the domain name resolution information of the corresponding mail servers are stored in the preset private mapping table, the resolution type in the domain name resolution information may be: A (Address, address) record, CNAME (Canonical Name, canonical name) record, MX (Mail Exchanger, mail exchange) record or NS (NameServer, resolution server) record, the resolution value can include: mail server IP address or resolution server IP address.

The domain name resolution information may also include: mail server host name, resolution server host name, domain name resolution information survival time or mail server domain name setting instructions.

After the domain name carried in the domain name resolution request message is obtained through step S201, the domain name resolution information corresponding to the domain name can be queried in the preset private mapping table.

For example, as shown in Table 1, Table 1 is a preset private mapping table. In Table 1, the domain names of different web servers and the domain name resolution information of the corresponding web servers are stored. In Table 1, the domain name resolution information includes: type, time-to-live, and parsed value.

For example: the domain name resolution type of "abc.com" is: A (Address, address) record, and the resolution value is: IP address of the website server; survival time: 3600s.

The domain name resolution type of bcd.com is: CNAME (canonical name) record, resolution value: host name of the website server; survival time: 3600s.

The domain name resolution type of cde.com is: NS (Name Server, resolution server) record, resolution value: resolution server hostname/IP address; survival time: 3600s.

Table 1 Default private mapping table

domain name parsing type Survival time (s) parsing value abc.com A 3600 Web server IP address bcd.com CNAME 3600 Web server hostname cde.com NS 3600 Resolve server hostname/IP address

In some examples, the preset private mapping table may be two tables, namely a preset first-level domain name table and a preset second-level domain name table. As shown in Table 2, it is the preset first-level domain name table in the preset private mapping table. In Table 2, it may include domain name ID (identity, identity), first-level domain name and survival time. Wherein, the domain name ID is the ID generated by the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention when establishing the preset private mapping table, and can be used to distinguish different domain names.

Table 2 The default first-level domain name table in the default private mapping table

Domain ID First-level domain name Survival time (s) 0102202 abc.com 86400 0102203 bcd.com 86400 0102204 cde.com 86400

As shown in Table 3, it is the preset second-level domain name table in the preset private mapping table. In Table 3, it may include domain name ID, second-level domain name, resolution type, survival time and resolution value. Wherein, the domain name ID in Table 3 is the same as the domain name ID in Table 2. In Table 3, domain name ID, second-level domain name, resolution type, survival time and resolution value are included.

Table 3 The default second-level domain name table in the default private mapping table

Domain ID secondary domain parsing type Survival time (s) parsing value 0102202 www. A 86400 IP address 1 0102203 www. A 86400 IP address 2 0102204 www. A 86400 IP address 3

For example, when the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention extracts the domain name from the domain name resolution request message as "www.abc.com", it can firstly select the default private mapping table shown in Table 2 Obtain the domain name ID corresponding to the first-level domain name in the preset first-level domain name table in the table, which is "0102202", and then, in the preset second-level domain name table in the preset private mapping table shown in Table 3, search for the same The domain name resolution information corresponding to the domain name "www.abc.com" can be obtained from the resolution type, lifetime and resolution value corresponding to the domain name ID "0102202". When the domain name resolution request message carries the resolution type requested for resolution, the resolution value corresponding to the resolution type is obtained as shown in Table 3. For example, when the resolution type of the request resolution carried in the domain name resolution request message is A (Address, address), the IP address corresponding to the domain name "www.abc.com" can be obtained from Table 3, which is IP address 1.

In some examples, for the convenience of storage, when establishing the preset second-level domain name table, the "abc.com" in the "www.abc.com" of the second-level domain name is omitted, and only the "www.abc.com" in "www.abc.com" "www." is stored in the default second-level domain name table, and the default first-level domain name table and the default second-level domain name table are associated with the domain name ID. The domain name resolution information corresponding to the domain name "www.abc.com" can be obtained through the preset first-level domain name table and the preset second-level domain name table in the preset private mapping table.

In some examples, when the authoritative DNS server using the domain name resolution method of the embodiment of the present invention extracts the domain name from the domain name resolution request message as "www.bcd.com", it can be obtained by querying Table 2 and Table 3. The IP address corresponding to the domain name is IP address 2.

When applying the authoritative DNS server of the domain name resolution method of the embodiment of the present invention, when the domain name extracted from the domain name resolution request message is "www.cde.com", the IP corresponding to the domain name can be obtained by querying Table 2 and Table 3 address, which is IP address 3.

In some examples, the authoritative DNS server can also load the preset first-level domain name table and the preset second-level domain name table in the preset private mapping table into the internal memory, and when receiving the domain name resolution request message, it can directly The domain name resolution information corresponding to the domain name carried in the domain name resolution request message is obtained from the internal memory, so that fast query and response can be realized.

In some examples, the preset private mapping table in the embodiment of the present invention can be stored in a database, which can be located in the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention, or can be located in the database server, communicate with the Authoritative DNS server for communication.

By querying the domain name resolution information corresponding to the domain name in the preset private mapping table, the domain name resolution information can be directly resolved through the domain name, and the domain name resolution request can be fine-grained without going through multiple nodes in the prior art. Analyze to get domain name resolution information. And through this step, the time consumed for resolving the domain name is reduced, and the resolution accuracy of the domain name is improved.

S203, when the domain name resolution information corresponding to the domain name is queried, send a resolution response message carrying the domain name resolution information to the local DNS server corresponding to the source IP address.

In some examples, when the domain name resolution information corresponding to the domain name is obtained through step S202, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention may add the domain name resolution information and the source IP address to the resolution response message , sent to the local DNS server corresponding to the source IP address.

Wherein, the source IP address here is the destination IP address in the parsing response message.

In the domain name resolution method provided by the embodiment of the present invention, the domain name resolution information corresponding to the domain name is queried in the preset private mapping table according to the domain name, and when the domain name resolution information corresponding to the domain name is queried, according to the source IP address, a The corresponding message of the resolution information is sent to the local DNS server; it can directly resolve the domain name resolution information through the domain name, perform stable and efficient fine-grained resolution of the domain name resolution request, improve the accuracy of domain name resolution, and reduce the time consumed by domain name resolution , to speed up DNS resolution.

In some examples, when obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, the domain name resolution request message can be detected. Specifically, the domain name resolution request message sent by the local DNS server can be obtained. The domain name and source IP address carried in the text may include:

The first step is to obtain the domain name resolution request message sent by the local DNS server, and detect whether the domain name resolution request message has a flag;

In the second step, when the domain name resolution request message does not have a marker bit, obtain the local DNS server IP address and the domain name carried in the domain name resolution request message;

The third step is to obtain the client IP address, domain name and local DNS server IP address carried in the domain name resolution request message when the domain name resolution request message has a flag bit.

In this step, it may be determined whether the domain name resolution request message supports EDNS by detecting whether there is a flag in the domain name resolution request message, wherein EDNS is an extension protocol of the DNS protocol. This protocol supports adding the client IP address to the domain name resolution request message.

In some examples, when detecting whether there is a flag bit in the domain name resolution request message, it can be detected whether there is an additional record in the domain name resolution request message, and when there is an additional record in the domain name resolution request message, you can view the additional record of the domain name resolution request message. A name and an additional record type. Here, the name of the additional record and the additional record type may be flag bits in this embodiment of the present invention.

For example, when the name of the additional record is empty and the type of the additional record is 41, the length of the selection code corresponding to the additional record can be checked. When the length of the selection code is 8, the IP address of the client can be obtained.

For the servers of content providers, based on GSLB (Global Server Load Balance, global server load balancing), multiple servers can be deployed in different geographic locations, and the IP addresses of each server are different. For example, the same website can Multiple servers are deployed in different geographic locations, and each server has a different IP address.

In view of the above situation, in order to realize the correct resolution of the domain name, the embodiment of the present invention also provides an implementation method, as shown in FIG. 3 , which is the flow of the second implementation mode of a domain name resolution method in the embodiment of the present invention Figure, the method may include:

S301. Obtain the IP address and domain name of the local DNS server carried in the domain name resolution request message.

In some examples, after receiving the domain name resolution request message sent by the local DNS server, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention can detect the flag bit of the domain name resolution request message, thereby, can judge Whether the domain name resolution request message is a domain name resolution request message supporting the EDNS protocol.

When the domain name resolution request message does not support EDNS, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention can obtain the local DNS server IP address and domain name in the domain name resolution request message.

S302. Obtain a plurality of first IP address segments corresponding to the domain name stored in the preset private mapping table.

Wherein, the first IP address segment is a collection of IP addresses of multiple local DNS servers, and the first IP address segment may be an IP address segment previously divided according to certain rules. The specific business of each server is divided into IP address segments. The first IP address segment may be stored in a preset private mapping table in the form of "start IP address-end IP address". The preset private mapping table may also store multiple first IP address segments, and each domain name may correspond to multiple first IP address segments.

Specifically, after the domain name is obtained through step S301, a plurality of first IP address segments corresponding to the domain name may be searched in a preset private mapping table.

For example, multiple first IP address segments may be configured for "abc.com" in the preset private mapping table shown in Table 1, and each first IP address segment is configured with a different resolution type and corresponding resolution value.

As shown in Table 4, in order to configure the preset private mapping tables of multiple first IP address segments for "abc.com", in Table 4, "abc.com" corresponds to multiple first IP address segments, respectively "Start IP address 1—end IP address 1", "start IP address 2—end IP address 2" and "start IP address 3—end IP address 3". Each first IP address segment may be configured with a resolution type, a lifetime and a resolution value. For example, the resolution type corresponding to the first IP address segment "starting IP address 1-ending IP address 1" is A, the lifetime is 86400s, and the resolution value is the IP address of the website server 1.

Table 4 The default private mapping table for configuring multiple first IP address segments for "abc.com"

Assuming that "abc.com" is the domain name requested for resolution, in this step, the "start IP address 1-end IP address 1" and "start IP address 2-end IP address" corresponding to "abc.com" can be Address 2" and "starting IP address 3-terminating IP address 3" are determined as a plurality of first IP address segments corresponding to the domain name.

S303. Among the multiple first IP address segments, determine the first IP address segment corresponding to the IP address of the local DNS server as the first target IP address segment.

In some examples, after obtaining multiple first IP address segments corresponding to the domain name requested to be resolved, it may be checked which IP address segment the IP address of the local DNS server is included in the multiple first IP address segments. Then the first IP address segment including the IP address of the local DNS server may be determined as the first target IP address segment.

Assuming that the local DNS server IP address is included in the first IP address segment of "start IP address 2-end IP address 2", then "start IP address 2-end IP address 2" can be determined as the first target IP address part.

S304. Determine the domain name resolution information corresponding to the first target IP address segment in the preset private mapping table as the domain name resolution information corresponding to the domain name.

After obtaining the first target IP address, domain name resolution information corresponding to the first target IP address segment can be searched in the preset private mapping table. After the domain name resolution information corresponding to the first target IP address segment is found, the domain name resolution information may be determined as domain name resolution information corresponding to the domain name.

For example, after the "starting IP address 2-ending IP address 2" is determined as the first target IP address segment through the above step S303, you can search in Table 4 corresponding to the "starting IP address 2-ending IP address 2" Specifically, in Table 4, the resolution type corresponding to "starting IP address 2-ending IP address 2" is A, that is to say, what is recorded in Table 4 is the domain name "abc. com" corresponds to the IP address of the web server 1. Therefore, the "website server 1 IP address" can be determined as the domain name resolution information corresponding to the domain name.

S305. Send a resolution response message carrying domain name resolution information to the local DNS server.

In some examples, after obtaining the domain name resolution information corresponding to the domain name through the above steps, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention can add the domain name resolution information and the IP address of the local DNS server to the resolution response In the message, it is sent to the local DNS server.

Wherein, the IP address of the local DNS server here is the destination IP address of the parsing response message.

In the existing technology, the major DNS domain name service providers split the IP database, so as to split the analysis line based on the geographical location. The largest granularity is only the province, city and operator, which is enough for ordinary DNS resolution. However, for the rapid development of CDN and video cloud services, the coarse-grained analysis of the existing technology cannot meet the user's requirements for network speed and service quality.

Through the domain name resolution method of the embodiment of the present invention, the domain name and domain name resolution information are bound to the IP address segment, so that the domain name resolution information of the target server closest to the local DNS server can be obtained, and the domain name resolution information is returned to the local DNS Server, so that the user can access the target server closest to the client, and realize the precise scheduling and analysis of the domain name according to the IP address of the local DNS server. When sending an email, the mail server of the target email box, for example, a website server providing video services or a server providing CDN (Content Delivery Network, content distribution network) services.

In some examples, the preset private mapping table may be two tables, namely a preset first-level domain name table including multiple first IP address segments and a preset second-level domain name table including different IP addresses.

As shown in Table 5, it is a preset first-level domain name table including multiple first IP address segments. In Table 5, each first-level domain name may correspond to different domain name IDs, different IP address segments and lifetimes. As shown in Table 6, it is a preset second-level domain name table containing different IP addresses. In Table 6, different domain name IDs may correspond to different second-level domain names, resolution types, lifetimes, and resolution values.

Assuming that the domain name requested by the local DNS server sending the domain name resolution request message to be resolved is "www.bcd.com", the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention, after receiving the domain name resolution request message, can Obtain the domain name "www.bcd.com" and the IP address of the local DNS server, and then, in the preset first-level domain name table containing multiple first IP address segments shown in Table 5, search for the domain name related to the local DNS IP address segment corresponding to the server.

Assuming that the IP address of the local DNS server is an IP address in the IP address range of "starting IP address 5 - ending IP address 5", then the IP address of the local DNS server is the same as "starting IP address 5 - ending IP address 5" "IP address segment corresponding. "Start IP address 5-end IP address 5" may be determined as the first target IP address segment. Then, the domain name ID corresponding to "starting IP address 5-ending IP address 5" can be searched from Table 5, which is "01022031".

For example, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention can search from the preset second-level domain name table containing different IP addresses shown in Table 6 according to the domain name ID, and obtain the domain name ID "01022031" The corresponding second-level domain name "ar." has resolution type A, lifetime is 86400s, and resolution value corresponding to resolution type A is IP address 8.

In some examples, for the convenience of storage, when creating the preset second-level domain name table, the "bcd.com" in the second-level domain name "ar.bcd.com" can be omitted, and only "ar.bcd.com The "ar." in " is stored in the preset second-level domain name table, and the default first-level domain name table and the preset second-level domain name table are associated with the domain name ID.

For example, by querying Table 5 and Table 6, the IP address of the server corresponding to the IP address of the local DNS server can be obtained, and the IP address is returned to the local DNS server. In this way, the client can access the server with the second-level domain name "ar.bcd.com", and realize the scheduling and resolution of the domain name.

Table 5 contains a table of preset first-level domain names of multiple first IP address segments

Domain ID First-level domain name IP address segment Survival time (s) 01022020 abc.com Start IP address 1—end IP address 1 86400 01022021 abc.com Start IP address 2—end IP address 2 86400 01022022 abc.com Start IP address 3—end IP address 3 86400 01022030 bcd.com Start IP Address 4—End IP Address 4 86400 01022031 bcd.com Start IP address 5—end IP address 5 86400 01022032 bcd.com Start IP Address 6—End IP Address 6 86400 01022040 cde.com Start IP address 7—end IP address 7 86400 01022041 cde.com Start IP address 8—end IP address 8 86400 01022042 cde.com Start IP address 9—end IP address 9 86400

Table 6 contains the default second-level domain name table of different IP addresses

Domain ID secondary domain parsing type Survival time (s) parsing value 01022020 ef. A 86400 IP address 4 01022021 ar. A 86400 IP address 5 01022022 dg. A 86400 IP address 6 01022030 ef. A 86400 IP address 7 01022031 ar. A 86400 IP address 8 01022032 dg. A 86400 IP address 9 01022040 ef. A 86400 IP address 10 01022041 ar. A 86400 IP address 11 01022042 dg. A 86400 IP address 12

However, in a possible situation, the client may send the domain name resolution request message to a local DNS server far away from the client, so that the domain name resolution information of the target server will be returned. It is not the domain name resolution information of the target server closest to the client.

In order to solve the above problems, the embodiment of the present invention also provides an implementation method, as shown in FIG. 4 , which is a flowchart of a third implementation mode of a domain name resolution method in the embodiment of the present invention. The method may include:

S401. Obtain the client IP address, domain name and local DNS server IP address carried in the domain name resolution request message.

In some examples, after receiving the domain name resolution request message sent by the local DNS server, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention can detect the flag bit of the domain name resolution request message, thereby, can judge Whether the domain name resolution request message is a domain name resolution request message supporting the EDNS protocol.

When the domain name resolution request message supports EDNS, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention can obtain the local DNS server IP address and domain name and client IP address in the domain name resolution request message.

S402. Obtain a plurality of second IP address segments corresponding to the domain name stored in the preset private mapping table.

Wherein, the second IP address segment is a collection of multiple client IP addresses, and the second IP address segment may be an IP address segment that is pre-divided according to certain rules. The specific business of the server is divided into IP address segments. The second IP address segment may be stored in a preset private mapping table in the form of "starting IP address-terminating IP address". Multiple second IP address segments may also be stored in the preset private mapping table, and each domain name may correspond to multiple second IP address segments.

Specifically, after the domain name is obtained in step S401, a plurality of second IP address segments corresponding to the domain name may be searched in a preset private mapping table.

S403. Among the multiple second IP address segments, determine that the second IP address segment corresponding to the client IP address is the second target IP address segment.

After obtaining multiple second IP address segments corresponding to the domain name, you can search for the second IP address segment corresponding to the client IP address in the multiple second IP address segments, and determine the second IP address segment as the second IP address segment. Destination IP address segment.

Here, the second IP address segment may include the IP address of the client.

S404. Determine the domain name resolution information corresponding to the second target IP address segment in the preset private mapping table as the domain name resolution information corresponding to the domain name.

Specifically, when establishing the preset private mapping table, the IP address and host name of the server closest to the client may be configured as domain name resolution information corresponding to the second target IP address segment.

In some examples, after obtaining the second target IP address, domain name resolution information corresponding to the second target IP address segment may be searched in a preset private mapping table. After finding the domain name resolution information corresponding to the second target IP address segment, the domain name resolution information may be determined as domain name resolution information corresponding to the domain name.

S405. Send a resolution response message carrying domain name resolution information to the local DNS server.

In some examples, after obtaining the domain name resolution information corresponding to the domain name through the above steps, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention can add the domain name resolution information and the IP address of the local DNS server to the resolution response In the message, it is sent to the local DNS server.

Wherein, the IP address of the local DNS server here is the destination IP address of the parsing response message.

Through the domain name resolution method of the embodiment of the present invention, the granularity of resolution scheduling can be accurate to the client IP address, and the domain name resolution information of the target server closest to the client can be returned to the local DNS server, so that the user can access the domain name with the client. to the nearest web server. Realize fine-grained scheduling and analysis of the domain name, where the target server is the web server of the client accessing the website, or the mail server of the target email when sending an email to the target email.

In some examples, when the domain name resolution information corresponding to the domain name is not found in the preset private mapping table of the authoritative DNS server, the embodiment of the present invention also provides a domain name resolution method, as shown in FIG. 5 , which is A flowchart of a fourth implementation of a domain name resolution method according to an embodiment of the present invention. After querying the domain name resolution information corresponding to the domain name in the preset private mapping table according to the domain name, the method may further include:

S501. When no domain name resolution information corresponding to the domain name is found, send a domain name resolution request message carrying the domain name to the public DNS server, so that the public DNS server performs recursive query.

Specifically, when the domain name resolution information corresponding to the domain name is not found in the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention, the authoritative DNS server can add the domain name to a domain name resolution request message, and Sent to the public DNS server, so that the public DNS server performs recursive query.

In order to more clearly illustrate the recursive query process of the public DNS server, the following will be described in conjunction with FIG. 6 . As shown in FIG. 6 , it is a schematic diagram of node division of the public DNS server in a domain name resolution method according to an embodiment of the present invention. In Figure 6, it can include root node (Default), first-level child nodes (telecom, mobile, etc.), leaf nodes (North China Telecom, South China Telecom, North China Netcom, South China Netcom, etc.), root node, child nodes and leaf nodes A tree structure can be formed, and each leaf node is bound to a corresponding IP address segment, and the IP address segment can be an IP address segment including the IP address of the local DNS server, or an IP address segment including the IP address of the client.

Suppose, after the public DNS server receives the domain name resolution request message and obtains the domain name, it first inquires in the resolution record of the "North China Telecom" node. When the resolution record corresponding to the domain name is not found in the node , then query in the node’s superior node “Telecom” node, if no query is found in the “Telecom” node, then query in the root node “Default”. Until the resolution record corresponding to the domain name is found.

The above step-by-step query process is called a recursive query process.

S502. Obtain the domain name resolution record obtained by the public DNS server through recursive query, and send a resolution response message carrying the domain name resolution record to the local DNS server corresponding to the source IP address.

Wherein, the source IP address may be an IP address of a local DNS server.

In some examples, after the public DNS server obtains the domain name resolution record corresponding to the domain name through recursive query, the domain name resolution record and the IP address of the local DNS server can be added to the resolution response message and fed back to the local DNS server .

Through the embodiment of the present invention, when the domain name resolution information corresponding to the domain name is not queried in the preset private mapping table, the domain name resolution record of each node can be queried in the public DNS server level by level, ensuring that the client can obtain Domain name resolution information corresponding to the domain name. This ensures that the client can correctly access the website or send emails correctly, and can complement and complement each other with the existing geographical location-based domain name resolution scheduling, making the domain name resolution process faster and more efficient.

It should be noted that, after receiving the domain name resolution request message, the authoritative DNS server applying the domain name resolution method of the embodiment of the present invention first inquires in the preset private mapping table. When the domain name resolution information corresponding to the domain name requested for resolution is requested, it is queried in the public DNS server. That is to say, the query priority of the preset private mapping table is higher than that of the public DNS server.

Specifically, before obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, the domain name resolution method in the embodiment of the present invention may also include:

The first step is to obtain the domain name, domain name resolution information, multiple first IP address segments or multiple second IP address segments.

Wherein, the first IP address segment is a collection of multiple local DNS server IP addresses, and the second IP address segment is a collection of multiple client IP addresses.

In some examples, the device applying the domain name resolution method of the embodiment of the present invention can obtain the domain name, domain name resolution information, multiple first IP address segments or multiple second IP address segments through an application programming interface. For example, after inputting the domain name, domain name resolution information, multiple first IP address segments or multiple second IP address segments on the terminal, the domain name, domain name resolution information, multiple first IP address segments or multiple second IP address segments can be obtained through the API interface. The second IP address segment. Wherein, the application programming interface may be an API (Application Programming Interface, application programming interface) interface, and the API interface may be connected to a terminal, and the terminal may be a personal computer.

In some examples, the device applying the domain name resolution method of the embodiment of the present invention can provide a dynamic webpage, and the user can input the domain name, domain name resolution information, multiple first IP address segments or multiple second IP address segments into the dynamic webpage address segment, and then, the device applying the domain name resolution method of the embodiment of the present invention can obtain the domain name, domain name resolution information, multiple first IP address segments or multiple second IP address segments through the provided dynamic web page.

Specifically, the domain name, domain name resolution information, and multiple first IP address segments can be input at the terminal, then the domain name resolution device in the embodiment of the present invention can obtain the domain name, domain name resolution information, and multiple first IP address segments through the API interface. .

It is also possible to input the domain name, domain name resolution information, and multiple second IP address segments at the terminal, then the domain name resolution device in the embodiment of the present invention can obtain the domain name, domain name resolution information, and multiple second IP address segments through the API interface.

The second step is to establish a preset private mapping table corresponding to the domain name and domain name resolution information and multiple first IP address segments, or to establish a preset private mapping table corresponding to domain name and domain name resolution information and multiple second IP address segments.

Specifically, when the domain name resolution device of the embodiment of the present invention obtains the domain name, domain name resolution information, and multiple first IP address segments through the API interface, it can establish a domain name, domain name resolution information, and multiple first IP address segments. Preset private mapping table; when the domain name resolution device of the embodiment of the present invention can obtain the domain name, domain name resolution information, and multiple second IP address segments through the API interface, it can establish domain name, domain name resolution information, and multiple second IP address segments. The preset private mapping table of the IP address segment.

Through the domain name resolution method of the embodiment of the present invention, the preset private mapping table can be customized remotely on different terminals, and remotely transmitted to the domain name resolution device applying the embodiment of the present invention.

It should be noted that after the preset private mapping table is established, operations such as modifying, deleting, adding, and querying the contents of the preset private mapping table can also be performed through the API interface.

Specifically, when the preset private mapping table is established, a status identifier may be added to the preset private mapping table for marking, and the status identifier is used to distinguish the preset private mapping table.

For example, the status identifier may be "0" or "1", the status identifier "1" indicates a preset private mapping table, and the status identifier "0" indicates a non-preset private mapping table.

By adding a state identifier to the preset private mapping table, it is convenient for the manager to distinguish the preset private mapping table from the non-preset private mapping table, thereby facilitating the management of the manager.

Corresponding to the above method embodiment, the embodiment of the present invention also provides a domain name resolution device, as shown in FIG. 7 , which is a schematic structural diagram of a domain name resolution device according to the embodiment of the present invention. The device may include:

The first acquiring module 701 is configured to acquire the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, where the source IP address includes the local DNS server IP address;

The parsing module 702 is configured to query domain name resolution information corresponding to the domain name in the preset private mapping table according to the domain name, wherein the preset private mapping table stores the domain name and domain name resolution information corresponding to the domain name, and the domain name resolution information includes : The resolution type corresponding to the domain name and the resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and saved in the preset private mapping table;

The response module 703 is configured to send a resolution response message carrying the domain name resolution information to the local DNS server corresponding to the source IP address when the domain name resolution information corresponding to the domain name is queried.

The domain name resolution device provided by the embodiment of the present invention queries the domain name resolution information corresponding to the domain name in the preset private mapping table according to the domain name. When the domain name resolution information corresponding to the domain name is found, according to the source IP address, it sends The resolution information of the resolution information is sent to the local DNS server; the domain name resolution information can be directly resolved through the domain name, and fine-grained resolution is performed on the domain name resolution request, which improves the accuracy of domain name resolution and reduces the time consumed by domain name resolution.

Specifically, the first obtaining module 701 is specifically used for:

Obtain the domain name resolution request message sent by the local DNS server, and detect whether the domain name resolution request message has a flag bit; when the domain name resolution request message does not have a flag bit, obtain the local DNS server IP address and Domain name; when the domain name resolution request message has a flag bit, obtain the client IP address, domain name and local DNS server IP address carried in the domain name resolution request message.

Specifically, a plurality of first IP address segments are also stored in the preset private mapping table, and the parsing module 802 includes:

The first obtaining submodule is used to obtain a plurality of first IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the first IP address segment is a collection of IP addresses of a plurality of local DNS servers;

The first determination submodule is used to determine, among the plurality of first IP address segments, that the first IP address segment corresponding to the IP address of the local DNS server is the first target IP address segment;

The first resolution sub-module is configured to determine domain name resolution information corresponding to the first target IP address segment in the preset private mapping table as domain name resolution information corresponding to the domain name.

Specifically, the first IP address segment is an IP address segment divided according to a geographical location, or an IP address segment divided according to a service of a service server.

Specifically, a plurality of second IP address segments are also stored in the preset private mapping table, and the parsing module 802 also includes:

The second obtaining submodule is used to obtain multiple second IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the second IP address segment is a collection of multiple client IP addresses;

A second determining module, configured to determine, among the plurality of second IP address segments, that the second IP address segment corresponding to the client IP address is the second target IP address segment;

The second resolution sub-module is configured to determine domain name resolution information corresponding to the second target IP address segment in the preset private mapping table as domain name resolution information corresponding to the domain name.

Specifically, the domain name resolution device in the embodiment of the present invention also includes:

The sending module is used to send the domain name resolution request message carrying the domain name to the public DNS server when the domain name resolution information corresponding to the domain name is not found, so that the public DNS server performs recursive query;

The response module 703 is also used to obtain the domain name resolution records obtained by the public DNS server through recursive query, and send a resolution response message carrying the domain name resolution records to the local DNS server corresponding to the source IP address.

Specifically, the resolution type includes: address record, canonical name record, mail exchange record or resolution server record;

The resolution value may include: the IP address of the website server, the IP address of the mail server or the IP address of the resolution server.

Specifically, the domain name resolution device in the embodiment of the present invention may also include:

The preset private mapping table building module is used to obtain domain names, domain name resolution information, multiple first IP address segments or multiple second IP address segments through application programming interfaces, and establish domain names and domain name resolution information, multiple first IP address segments A preset private mapping table corresponding to the address segment, or establishing a default private mapping table corresponding to the domain name and domain name resolution information, and multiple second IP address segments, wherein the first IP address segment is a collection of multiple local DNS server IP addresses , the second IP address segment is a collection of multiple client IP addresses.

Specifically, the preset private mapping table includes a status identifier, and the status identifier is used to distinguish the preset private mapping table.

The embodiment of the present invention also provides an electronic device. As shown in FIG. 8 , it is a schematic structural diagram of a domain name resolution method applied to an electronic device according to an embodiment of the present invention. The electronic device may include a processor 810 and a machine-readable storage The medium 820, the machine-readable storage medium 820 stores machine-executable instructions that can be executed by the processor 810, and the processor 810 is prompted by the machine-executable instructions to: implement the following steps:

Step A, obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, wherein the source IP address includes the local DNS server IP address;

Step B, according to the domain name, query the domain name resolution information corresponding to the domain name in the preset private mapping table, wherein the domain name and domain name resolution information corresponding to the domain name are stored in the preset private mapping table, and the domain name resolution information includes: domain name correspondence The resolution type and the resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and saved in the preset private mapping table;

Step C, when the domain name resolution information corresponding to the domain name is queried, send a resolution response message carrying the domain name resolution information to the local DNS server corresponding to the source IP address.

The machine-readable storage medium 820 may include a random access memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-Volatile Memory, NVM), such as at least one magnetic disk memory. Optionally, the memory may also be at least one storage device located far away from the aforementioned processor.

The above-mentioned processor 810 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; it may also be a digital signal processor (Digital Signal Processing, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

In the electronic device applying the domain name resolution method provided by the embodiment of the present invention, the domain name resolution information corresponding to the domain name is queried in the preset private mapping table according to the domain name, and when the domain name resolution information corresponding to the domain name is queried, according to the source IP address, Send the corresponding resolution message carrying the domain name resolution information to the local DNS server; it can directly resolve the domain name resolution information through the domain name, perform fine-grained resolution on the domain name resolution request, improve the accuracy of domain name resolution, and reduce the consumption of domain name resolution time.

The embodiment of the present invention also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the following methods are implemented:

Step A, obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, wherein the source IP address includes the local DNS server IP address;

Step B, according to the domain name, query the domain name resolution information corresponding to the domain name in the preset private mapping table, wherein the domain name and domain name resolution information corresponding to the domain name are stored in the preset private mapping table, and the domain name resolution information includes: domain name correspondence The resolution type and the resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and stored in the preset private mapping table;

Step C, when the domain name resolution information corresponding to the domain name is queried, send a resolution response message carrying the domain name resolution information to the local DNS server corresponding to the source IP address.

An embodiment of the present invention also provides a computer program product containing instructions, which when run on a computer, causes the computer to perform the following method:

Step A, obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, wherein the source IP address includes the local DNS server IP address;

Step B, according to the domain name, query the domain name resolution information corresponding to the domain name in the preset private mapping table, wherein the domain name and domain name resolution information corresponding to the domain name are stored in the preset private mapping table, and the domain name resolution information includes: domain name correspondence The resolution type and the resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and stored in the preset private mapping table;

Step C, when the domain name resolution information corresponding to the domain name is queried, send a resolution response message carrying the domain name resolution information to the local DNS server corresponding to the source IP address.

In the sixth aspect, the embodiment of the present invention also provides a computer program, which, when running on a computer, causes the computer to perform the following method:

Step A, obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, wherein the source IP address includes the local DNS server IP address;

Step B, according to the domain name, query the domain name resolution information corresponding to the domain name in the preset private mapping table, wherein the domain name and domain name resolution information corresponding to the domain name are stored in the preset private mapping table, and the domain name resolution information includes: domain name correspondence The resolution type and the resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and stored in the preset private mapping table;

Step C, when the domain name resolution information corresponding to the domain name is queried, send a resolution response message carrying the domain name resolution information to the local DNS server corresponding to the source IP address.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Each embodiment in this specification is described in a related manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for relevant parts, refer to part of the description of the method embodiment.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (16)

1. a domain name resolution method, is characterized in that, described method comprises: Obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, wherein the source IP address includes the local DNS server IP address; According to the domain name, the domain name resolution information corresponding to the domain name is queried in the preset private mapping table, wherein the domain name and the domain name resolution corresponding to the domain name are stored in the preset private mapping table information, the domain name resolution information includes: the resolution type corresponding to the domain name and the resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and stored in the preset private mapping table; When the domain name resolution information corresponding to the domain name is queried, a resolution response message carrying the domain name resolution information is sent to the local DNS server corresponding to the source IP address. 2. The method according to claim 1, wherein said obtaining the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server comprises: Obtain the domain name resolution request message sent by the local DNS server, and detect whether the domain name resolution request message has a flag; When the domain name resolution request message has no flag bit, obtain the local DNS server IP address and domain name carried in the domain name resolution request message; When the domain name resolution request message has a flag bit, obtain the client IP address, domain name and local DNS server IP address carried in the domain name resolution request message. 3. The method according to claim 1 or 2, wherein a plurality of first IP address segments are also stored in the preset private mapping table, and according to the domain name, in the preset private mapping table Query the domain name resolution information corresponding to the domain name, including: Obtaining multiple first IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the first IP address segment is a set of multiple IP addresses of the local DNS server; Among the plurality of first IP address segments, determining that the first IP address segment corresponding to the IP address of the local DNS server is the first target IP address segment; The domain name resolution information corresponding to the first target IP address segment in the preset private mapping table is determined as the domain name resolution information corresponding to the domain name. 4. The method according to claim 3, wherein the first IP address segment is an IP address segment divided according to geographical location, or an IP address segment divided according to service of a service server. 5. The method according to claim 2, wherein a plurality of second IP address segments are also stored in the preset private mapping table, and according to the domain name, query and The domain name resolution information corresponding to the domain name includes: Obtaining multiple second IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the second IP address segment is a set of multiple client IP addresses; Among the plurality of second IP address segments, determining that the second IP address segment corresponding to the client IP address is the second target IP address segment; The domain name resolution information corresponding to the second target IP address segment in the preset private mapping table is determined as the domain name resolution information corresponding to the domain name. 6. The method according to claim 1, wherein the resolution type includes: address record, canonical name record, mail exchange record or resolution server record; The resolution value includes: the IP address of the website server, the IP address of the mail server or the IP address of the resolution server. 7. The method according to claim 1, wherein, before obtaining the domain name and the source IP address carried in the domain name resolution request message sent by the local DNS server, the method further comprises: Obtain domain names, domain name resolution information, multiple first IP address segments or multiple second IP address segments, wherein the first IP address segments are a collection of multiple local DNS server IP addresses, and the second IP address segments It is a collection of multiple client IP addresses; Establishing a preset private mapping table corresponding to the domain name and the domain name resolution information and the plurality of first IP address segments, or establishing a correspondence between the domain name and the domain name resolution information and the plurality of second IP address segments The default private mapping table for . 8. The method according to claim 7, wherein the preset private mapping table includes a status identifier, and the status identifier is used to distinguish the preset private mapping table. 9. A domain name resolution device, characterized in that the device comprises: The first obtaining module is used to obtain the domain name and source IP address carried in the domain name resolution request message sent by the local DNS server, wherein the source IP address includes the local DNS server IP address; A resolution module, configured to query domain name resolution information corresponding to the domain name in a preset private mapping table according to the domain name, wherein the preset private mapping table stores the domain name and the domain name corresponding to the domain name The domain name resolution information, the domain name resolution information includes: the resolution type corresponding to the domain name and the resolution value corresponding to the resolution type, the domain name resolution information is pre-configured and stored in the preset private mapping table; A response module, configured to send a resolution response message carrying the domain name resolution information to the local DNS server corresponding to the source IP address when the domain name resolution information corresponding to the domain name is queried. 10. The device according to claim 9, wherein the first acquiring module is specifically configured to: Obtain the domain name resolution request message sent by the local DNS server, and detect whether the domain name resolution request message has a flag; when the domain name resolution request message does not have a flag, obtain the Local DNS server IP address and domain name; when the domain name resolution request message has a flag bit, obtain the client IP address, domain name and local DNS server IP address carried in the domain name resolution request message. 11. The device according to claim 9 or 10, wherein a plurality of first IP address segments are also stored in the preset private mapping table, and the parsing module includes: The first acquiring submodule is configured to acquire a plurality of first IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the first IP address segments are a plurality of the local DNS A collection of server IP addresses; The first determining submodule is configured to determine, among the plurality of first IP address segments, that the first IP address segment corresponding to the IP address of the local DNS server is the first target IP address segment; The first resolution submodule is configured to determine domain name resolution information corresponding to the first target IP address segment in the preset private mapping table as domain name resolution information corresponding to the domain name. 12. The device according to claim 10, wherein a plurality of second IP address segments are also stored in the preset private mapping table, and the parsing module further includes: The second acquiring submodule is configured to acquire multiple second IP address segments corresponding to the domain name stored in the preset private mapping table, wherein the second IP address segments are multiple client IPs a collection of addresses; A second determining module, configured to, among the plurality of second IP address segments, determine that the second IP address segment corresponding to the client IP address is the second target IP address segment; The second resolution submodule is configured to determine the domain name resolution information corresponding to the second target IP address segment in the preset private mapping table as domain name resolution information corresponding to the domain name. 13. The device according to claim 9, wherein the resolution type includes: address record, canonical name record, mail exchange record or resolution server record; The resolution value includes: the IP address of the website server, the IP address of the mail server or the IP address of the resolution server. 14. The device according to claim 9, further comprising: The preset private mapping table establishment module is used to obtain domain names, domain name resolution information, multiple first IP address segments or multiple second IP address segments, and establish the domain name and the domain name resolution information, the multiple first IP address segments A preset private mapping table corresponding to the IP address segment, or establishing a preset private mapping table corresponding to the domain name, the domain name resolution information, and the plurality of second IP address segments, wherein the first IP address segment is A collection of multiple local DNS server IP addresses, and the second IP address segment is a collection of multiple client IP addresses. 15. An electronic device, characterized in that it includes a processor and a machine-readable storage medium, the machine-readable storage medium stores machine-executable instructions that can be executed by the processor, and the processor is controlled by the The machine-executable instructions cause: implementing the method steps described in any one of claims 1-8. 16. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented step.