CN106210173A - DNS replys retransmission method and the device of message - Google Patents
DNS replys retransmission method and the device of message Download PDFInfo
- Publication number
- CN106210173A CN106210173A CN201610620532.4A CN201610620532A CN106210173A CN 106210173 A CN106210173 A CN 106210173A CN 201610620532 A CN201610620532 A CN 201610620532A CN 106210173 A CN106210173 A CN 106210173A
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- China
- Prior art keywords
- dns
- message
- attribute information
- interface
- request message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
Abstract
The application is to reply retransmission method and the device of message about domain name system DNS, and described method includes: obtain attribute information from the DNS request message received；Wherein, described attribute information includes request serial number and the request domain name that described DNS request message carries；Preserve the corresponding relation of described attribute information and the incoming interface of described DNS request message；Receive the DNS corresponding with described DNS request message and reply message；Wherein, described DNS reply message includes the attribute information of described DNS request message；Reply the attribute information in message according to described DNS from described corresponding relation, obtain the incoming interface of correspondence；Described DNS is forwarded to reply message based on described incoming interface.In this application, the network equipment can forward the DNS corresponding with this DNS request message to reply message by the incoming interface of DNS request message, such that it is able to guarantee that this DNS replys message and is successfully sent in the case of not query routing to next-hop device, the problem solving correlation technique.
Description
Technical field
The application relates to communication technical field, particularly relates to a kind of DNS (Domain Name System, domain name system) and returns
The retransmission method of multiple message and device.
Background technology
When browsing webpage, if input is domain name, then main frame can send domain name request to dns server, and DNS takes
After business device receives this domain name request, this domain name request can be resolved to the IP address of correspondence, then, this IP address is sent
To main frame, so that main frame can obtain the resource of request by accessing this IP address.
But, in the related, dns server is likely not to have the route of host ip or has the equal-cost route of host ip,
When dns server does not has the route of host ip, above-mentioned IP address cannot be successfully transmitted to main frame by dns server；When DNS takes
When business device has the equal-cost route of host ip, above-mentioned IP address is being sent to main frame by dns server, it is more likely that will
Above-mentioned IP address sends to other links of equal value, thus cannot be successfully transmitted above-mentioned IP address to main frame.
Summary of the invention
In view of this, the application provides sending method and the device of a kind of DNS reply message, solves in correlation technique
DNS replys the problem that message cannot be successfully transmitted.
Specifically, the application is achieved by the following technical solution:
The application provides a kind of domain name system DNS to reply the retransmission method of message, and described method is applied to the network equipment, institute
The method of stating includes:
Attribute information is obtained from the DNS request message received；Wherein, described attribute information includes described DNS request
Request serial number that message carries and request domain name；
Preserve the corresponding relation of described attribute information and the incoming interface of described DNS request message；
Receive the DNS corresponding with described DNS request message and reply message；Wherein, described DNS reply message includes described
The attribute information of DNS request message；
Reply the attribute information in message according to described DNS from described corresponding relation, obtain the incoming interface of correspondence；
Described DNS is forwarded to reply message based on described incoming interface.
Optionally, described incoming interface includes physical interface, VLAN vlan interface and aggregation interface.
Optionally, described based on described incoming interface forward described DNS reply message include:
Using described incoming interface as outgoing interface；
Described DNS is forwarded to reply message from described outgoing interface.
The application provides a kind of domain name system DNS to reply the retransmission unit of message simultaneously, it is characterised in that described device should
For the network equipment, described device includes:
Attribute information obtains unit, for obtaining attribute information from the DNS request message received；Wherein, described genus
Property information include request serial number and the request domain name that described DNS request message carries；
Storage unit, for preserving the corresponding relation of described attribute information and the incoming interface of described DNS request message；
Receive unit, reply message for receiving the DNS corresponding with described DNS request message；Wherein, described DNS replys
Message includes the attribute information of described DNS request message；
Incoming interface obtains unit, obtains from described corresponding relation for the attribute information replied in message according to described DNS
Obtain corresponding incoming interface；
Retransmission unit, for forwarding described DNS to reply message based on described incoming interface.
Optionally, described incoming interface includes physical interface, VLAN vlan interface and aggregation interface.
Optionally, described retransmission unit specifically for:
Using described incoming interface as outgoing interface；
Described DNS is forwarded to reply message from described outgoing interface.
In this application, the network equipment, after receiving DNS request message, can obtain genus from this DNS request message
Property information, wherein, this attribute information can include request serial number and the request domain name that this DNS request message carries, then,
The network equipment can preserve the corresponding relation of this attribute information and the incoming interface of above-mentioned DNS request message, closes preserving this correspondence
After system, the network equipment can receive the DNS corresponding with described DNS request message and reply message, and wherein, this DNS replys message can
To include the attribute information of above-mentioned DNS request message, then, the network equipment can reply the attribute letter in message according to this DNS
Breath obtains the incoming interface of correspondence from above-mentioned corresponding relation, and forwards this DNS to reply message based on this incoming interface.
In this application, the network equipment can be forwarded and this DNS request message pair by the incoming interface of DNS request message
The DNS answered replys message, such that it is able to guarantee that this DNS replys message and is successfully sent to next in the case of not query routing
Jumping equipment, the problem solving correlation technique.
Accompanying drawing explanation
Fig. 1 is an application scenarios figure of correlation technique；
Fig. 2 is another application scenarios figure of correlation technique；
Fig. 3 is the embodiment flow chart that a kind of DNS shown in the application replys the retransmission method of message；
Fig. 4 is a kind of hardware structure diagram that the application DNS replys the retransmission unit place equipment of message；
Fig. 5 is the embodiment block diagram that a kind of DNS shown in the application replys the retransmission unit of message.
Detailed description of the invention
Here will illustrate exemplary embodiment in detail, its example represents in the accompanying drawings.Explained below relates to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they are only with the most appended
The example of the apparatus and method that some aspects that described in detail in claims, the application are consistent.
It is only merely for describing the purpose of specific embodiment at term used in this application, and is not intended to be limiting the application.
" a kind of ", " described " and " being somebody's turn to do " of singulative used in the application and appended claims is also intended to include majority
Form, unless context clearly shows that other implications.It is also understood that term "and/or" used herein refers to and wraps
Any or all containing one or more projects of listing being associated may combination.
Although should be appreciated that in the application possible employing term first, second, third, etc. to describe various information, but this
A little information should not necessarily be limited by these terms.These terms are only used for same type of information is distinguished from each other out.Such as, without departing from
In the case of the application scope, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depend on linguistic context, word as used in this " if " can be construed to " ... time " or " when ...
Time " or " in response to determining ".
Refer to Fig. 1, for an application scenarios figure of correlation technique.In Fig. 1, when telecommunication user (assumes that IP address is
When 10.1.1.1) accessing domain name www.dp.com, can obtain and this territory by sending DNS request message to dns server
The IP address that name is corresponding.After dns server receives this DNS request message, can generate correspondence DNS reply message, wherein,
This DNS replys message can carry the IP address corresponding with domain name www.dp.com that above-mentioned DNS request message carries, and such as may be used
Think 20.1.1.1.This message, after generating corresponding DNS reply message, can be sent extremely above-mentioned telecommunications and use by dns server
Family, but, owing to the IP address of dns server belongs to UNICOM's network segment, therefore, when dns server sends DNS reply message,
Cannot find the route going to IP address 10.1.1.1, now, dns server can abandon this DNS and reply message, thus causes
State telecommunication user and cannot receive this DNS reply message.
Refer to Fig. 2, for another application scenarios figure of correlation technique.In Fig. 2, above-mentioned telecommunication user can be also assumed that
IP address be 10.1.1.1, and need access domain name www.dp.com, now, this telecommunication user again may be by DNS
Server sends DNS request message and obtains the IP address corresponding with this domain name.Also assume that dns server is according to carrying domain name
The DNS request message of www.dp.com generates the DNS reply message carrying corresponding IP address 20.1.1.1.Now, dns server
This DNS generated can be replied message to send to above-mentioned telecommunication user, but, owing to dns server can have two IP ground
Location, and these two IP addresses can be belonging respectively to operator of UNICOM and mobile operator, therefore, return when dns server sends this DNS
During multiple message, can inquire and go to the route of IP address 10.1.1.1 is equal-cost route, and now, dns server has 50%
Probability forwards from mobile link, owing to mobile router is not connected with telecommunication router, therefore, when dns server is from movement
When link forwards this DNS to reply message, this DNS replys message cannot arrive the user that IP address is 10.1.1.1, i.e. above-mentioned electricity
Credit household cannot receive this DNS and reply message.
In view of this, this application provides a kind of DNS and reply retransmission method and the device of message, solve in correlation technique
DNS replys the problem that message cannot be successfully transmitted.In this application, the network equipment after receiving DNS request message, Ke Yicong
Obtaining attribute information in this DNS request message, wherein, this attribute information can include the request sequence that this DNS request message carries
Row number and request domain name, then, the network equipment can preserve the right of this attribute information and the incoming interface of above-mentioned DNS request message
Should be related to, after preserving this corresponding relation, the network equipment can receive the DNS corresponding with described DNS request message and reply message,
Wherein, this DNS replys message can include the attribute information of above-mentioned DNS request message, and then, the network equipment can be according to this
DNS replys the attribute information in message and obtains the incoming interface of correspondence from above-mentioned corresponding relation, and should based on the forwarding of this incoming interface
DNS replys message.
In this application, the network equipment can be forwarded and this DNS request message pair by the incoming interface of DNS request message
The DNS answered replys message, such that it is able to guarantee that this DNS replys message and is successfully sent to next in the case of not query routing
Jumping equipment, the problem solving correlation technique.
Referring to Fig. 3, reply the embodiment flow chart of the retransmission method of message for a kind of DNS shown in the application, this is real
Execute example and be applied to the network equipment, comprise the following steps:
Step 301: obtain attribute information from the DNS request message received；Wherein, described attribute information includes described
Request serial number that DNS request message carries and request domain name.
In this application, the above-mentioned network equipment can be dns server or the autonomous device being connected with dns server, on
State the network equipment and can receive DNS request message, it is then possible to this DNS request message is resolved, and obtain this DNS please
Seek the attribute information that message carries, wherein, this attribute information can include request serial number that this DNS request message carries and
Request domain name.
It should be noted that this request serial number can be automatically generated by the subscription client sending this DNS request message,
For example, it is possible to be 21.Above-mentioned request domain name can be the domain-name information that this DNS request message carries, for example, it is possible to be
www.dp.com。
Step 302: preserve the corresponding relation of described attribute information and the incoming interface of described DNS request message.
In this application, the network equipment, after the attribute information obtaining above-mentioned DNS request message, can be somebody's turn to do based on receiving
The interface of DNS request message generates the corresponding relation of above-mentioned attribute information and the incoming interface of above-mentioned DNS request message, then, net
Network equipment can preserve this corresponding relation.
It should be noted that above-mentioned incoming interface can be physical interface, vlan (Virtual Local Area
Network, VLAN) interface and aggregation interface etc..
In the embodiment illustrated, it can be assumed that the incoming interface of above-mentioned DNS request message is 34, then the network equipment is protected
The corresponding relation of the above-mentioned attribute information deposited and the incoming interface of above-mentioned DNS request message can be as shown in table 1:
| DNS request serial number | Request domain name | Incoming interface |
| 21 | www.dp.com | 34 |
Table 1
Step 303: receive the DNS corresponding with described DNS request message and reply message；Wherein, described DNS replys message bag
Include the attribute information of described DNS request message.
In this application, the network equipment can receive the DNS corresponding with above-mentioned DNS request message and reply message, wherein, is somebody's turn to do
DNS replys message and can be sent by corresponding dns server.
Needing explanation, the above-mentioned DNS that the network equipment receives replys message can carry corresponding DNS request message
Attribute information.
Step 304: the attribute information replied in message according to described DNS obtain from described corresponding relation correspondence enter to connect
Mouthful.
In this application, the network equipment, can be by replying message to this DNS after have received above-mentioned DNS reply message
Resolve and obtain this DNS and reply the attribute information that carries of message, then, the network equipment can be according to this attribute information from above-mentioned right
The middle incoming interface obtaining correspondence should be related to.
In the embodiment illustrated, include above-mentioned request serial number 21 with the attribute information that DNS reply message carries
And request domain name www.dp.com as a example by, the network equipment can according to this request serial number and request domain name from such as table 1 institute
The corresponding relation shown obtains the incoming interface 34 of correspondence.
Step 305: forward described DNS to reply message based on described incoming interface.
In this application, the network equipment, after obtaining above-mentioned incoming interface, can forward above-mentioned DNS to reply based on this incoming interface
Message, specifically, this incoming interface can be forwarded above-mentioned DNS to reply message as outgoing interface by the network equipment.
In this application, the network equipment, after receiving DNS request message, can obtain genus from this DNS request message
Property information, wherein, this attribute information can include request serial number and the request domain name that this DNS request message carries, then,
The network equipment can preserve the corresponding relation of this attribute information and the incoming interface of above-mentioned DNS request message, closes preserving this correspondence
After system, the network equipment can receive the DNS corresponding with described DNS request message and reply message, and wherein, this DNS replys message can
To include the attribute information of above-mentioned DNS request message, then, the network equipment can reply the attribute letter in message according to this DNS
Breath obtains the incoming interface of correspondence from above-mentioned corresponding relation, and forwards this DNS to reply message based on this incoming interface.
In this application, the network equipment can be forwarded and this DNS request message pair by the incoming interface of DNS request message
The DNS answered replys message, such that it is able to guarantee that this DNS replys message and is successfully sent to next in the case of not query routing
Jumping equipment, the problem solving correlation technique.
Corresponding with the embodiment of the sending method that aforementioned DNS replys message, present invention also provides DNS and reply message
The embodiment of retransmission unit.
The embodiment of the retransmission unit that the application DNS replys message can be applied on network devices.Device embodiment can
To be realized by software, it is also possible to realize by the way of hardware or software and hardware combining.As a example by implemented in software, as one
Device on logical meaning, is that computer program corresponding in nonvolatile memory is referred to by the processor by its place equipment
Order reads and runs formation in internal memory.For hardware view, as shown in Figure 4, the forwarding dress of message is replied for the application DNS
Put a kind of hardware structure diagram of place equipment, except the processor shown in Fig. 4, internal memory, network interface and non-volatile memories
Outside device, in embodiment, the network equipment at device place generally can also include other hardware, such as the forwarding of responsible process message
Chip etc..
Refer to Fig. 5, reply the embodiment block diagram of the retransmission unit of message for a kind of DNS shown in the application.
This device may include that attribute information obtains unit 510, storage unit 520, receives unit 530, incoming interface acquisition
Unit 540 and retransmission unit 550.
Wherein, attribute information obtains unit 510, for obtaining attribute information from the DNS request message received；Its
In, described attribute information includes request serial number and the request domain name that described DNS request message carries；
Storage unit 520, for preserving the corresponding relation of described attribute information and the incoming interface of described DNS request message；
Receive unit 530, reply message for receiving the DNS corresponding with described DNS request message；Wherein, described DNS returns
Multiple message includes the attribute information of described DNS request message；
Incoming interface obtains unit 540, for replying the attribute information in message according to described DNS from described corresponding relation
Obtain corresponding incoming interface；
Retransmission unit 550, for forwarding described DNS to reply message based on described incoming interface.
In an optional embodiment, described incoming interface can include physical interface, VLAN vlan interface
And aggregation interface.
In an optional embodiment, described retransmission unit 550 specifically for:
Using described incoming interface as outgoing interface；
Described DNS is forwarded to reply message from described outgoing interface.
In this application, the network equipment, after receiving DNS request message, can obtain genus from this DNS request message
Property information, wherein, this attribute information can include request serial number and the request domain name that this DNS request message carries, then,
The network equipment can preserve the corresponding relation of this attribute information and the incoming interface of above-mentioned DNS request message, closes preserving this correspondence
After system, the network equipment can receive the DNS corresponding with described DNS request message and reply message, and wherein, this DNS replys message can
To include the attribute information of above-mentioned DNS request message, then, the network equipment can reply the attribute letter in message according to this DNS
Breath obtains the incoming interface of correspondence from above-mentioned corresponding relation, and forwards this DNS to reply message based on this incoming interface.
In this application, the network equipment can be forwarded and this DNS request message pair by the incoming interface of DNS request message
The DNS answered replys message, such that it is able to guarantee that this DNS replys message and is successfully sent to next in the case of not query routing
Jumping equipment, the problem solving correlation technique.
In said apparatus, the function of unit and the process that realizes of effect specifically refer to corresponding step in said method
Realize process, do not repeat them here.
For device embodiment, owing to it corresponds essentially to embodiment of the method, so relevant part sees method in fact
The part executing example illustrates.Device embodiment described above is only schematically, wherein said as separating component
The unit illustrated can be or may not be physically separate, and the parts shown as unit can be or can also
It not physical location, i.e. may be located at a place, or can also be distributed on multiple NE.Can be according to reality
Need to select some or all of module therein to realize the purpose of the application scheme.Those of ordinary skill in the art are not paying
In the case of going out creative work, i.e. it is appreciated that and implements.
The foregoing is only the preferred embodiment of the application, not in order to limit the application, all essences in the application
Within god and principle, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the application protection.
Claims (6)
1. the retransmission method of a domain name system DNS reply message, it is characterised in that described method is applied to the network equipment, institute
The method of stating includes:
Attribute information is obtained from the DNS request message received；Wherein, described attribute information includes described DNS request message
The request serial number carried and request domain name；
Preserve the corresponding relation of described attribute information and the incoming interface of described DNS request message；
Receive the DNS corresponding with described DNS request message and reply message；Wherein, described DNS reply message includes that described DNS please
Seek the attribute information of message；
Reply the attribute information in message according to described DNS from described corresponding relation, obtain the incoming interface of correspondence；
Described DNS is forwarded to reply message based on described incoming interface.
Method the most according to claim 1, it is characterised in that described incoming interface includes physical interface, VLAN
Vlan interface and aggregation interface.
Method the most according to claim 1, it is characterised in that described reply based on the described incoming interface described DNS of forwarding is reported
Literary composition includes:
Using described incoming interface as outgoing interface；
Described DNS is forwarded to reply message from described outgoing interface.
4. the retransmission unit of a domain name system DNS reply message, it is characterised in that described device is applied to the network equipment, institute
State device to include:
Attribute information obtains unit, for obtaining attribute information from the DNS request message received；Wherein, described attribute letter
Cease request serial number and the request domain name including that described DNS request message carries；
Storage unit, for preserving the corresponding relation of described attribute information and the incoming interface of described DNS request message；
Receive unit, reply message for receiving the DNS corresponding with described DNS request message；Wherein, described DNS replys message
Attribute information including described DNS request message；
Incoming interface obtains unit, right for obtaining from described corresponding relation according to the attribute information in described DNS reply message
The incoming interface answered；
Retransmission unit, for forwarding described DNS to reply message based on described incoming interface.
Device the most according to claim 4, it is characterised in that described incoming interface includes physical interface, VLAN
Vlan interface and aggregation interface.
Device the most according to claim 4, it is characterised in that described retransmission unit specifically for:
Using described incoming interface as outgoing interface；
Described DNS is forwarded to reply message from described outgoing interface.
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| CN201610620532.4A CN106210173A (en) | 2016-07-29 | 2016-07-29 | DNS replys retransmission method and the device of message |
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| CN201610620532.4A CN106210173A (en) | 2016-07-29 | 2016-07-29 | DNS replys retransmission method and the device of message |
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Cited By (1)
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Address after: Binjiang District and Hangzhou city in Zhejiang Province Road 310051 No. 68 in the 6 storey building Applicant after: Hangzhou Dipu Polytron Technologies Inc Address before: Binjiang District and Hangzhou city in Zhejiang Province Road 310051 No. 68 in the 6 storey building Applicant before: Hangzhou Dipu Technology Co., Ltd. |
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Application publication date: 20161207 |