CN103763194B - A kind of message forwarding method and device - Google Patents
A kind of message forwarding method and device Download PDFInfo
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- CN103763194B CN103763194B CN201310754875.6A CN201310754875A CN103763194B CN 103763194 B CN103763194 B CN 103763194B CN 201310754875 A CN201310754875 A CN 201310754875A CN 103763194 B CN103763194 B CN 103763194B
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Abstract
The invention discloses a kind of message forwarding method, applied to being provided with the access device of fast-forwarding table, when access device is receiving the message that purpose information is not matched with fast-forwarding table, by the purpose information and link layer header used in forwarding the message is preserved into fast-forwarding table, so as to directly forward or abandon the message according to forwarding rule in the message of the subsequently received and purpose information matches, it can be filtered for the message of forwarding, it is effectively guaranteed the security of network, the manageability and convenience of message forwarding are also improved simultaneously.The present invention also discloses a kind of access device.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of message forwarding method.The present invention also relates to one kind
Access device.
Background technology
Portal of the prior art（Entrance）System composition schematic diagram is as shown in figure 1, access device therein is exchange
The general designation of the broadband access equipments such as machine, router, is mainly used in verification process and Portal server, security policy service
Device, certification/accounting server etc. are interacted, and complete the function of authentication/safety certification/charging, and in certification by rear,
User is allowed to access the Internet resources that the person of being managed authorizes.
As shown in Fig. 2 for the application scenarios schematic diagram of access device, terminal passes through NAS（Network Access
Server, network insertion service）Equipment access network, the physical interface of connection is to enable Portal on interface A, interface A.It is all
The message that terminal is sent, is received by interface A（Enter direction processing）, now, NAS carries out flag check to the message received,
During with Permit rules, message allows to let pass, and when mismatching Permit rules, message is by Deny.For being sent from external network
To the message of user, sent from interface A（Outgoing direction processing）Then without any filtration treatment during to user, at whole clearances
Reason.
In user authentication by rear, the ad hoc rules of user will be issued on interface A, to limit customer flow or permit
Perhaps specific resource etc. is accessed.Matched completely for entering the flow in direction and complete speed limit business and traffic statistics, and it is right
In the flow of outgoing direction, traffic statistics and speed limit processing are only carried out, without rule match.Therefore, in the case where active user clicks on
After line button, NAS no longer provides access service, and the rule of the user will be deleted, but physical connection also exists, NAS hairs
The message user sent can still receive, and so not only the speed limit of outgoing direction is no longer valid, nor there is the stream of outgoing direction
Amount filtering, message will directly be let pass.Offline button is for example clicked on when user downloads big file, descending flow is not
It can at once stop, also may proceed to send, if not making outgoing direction filtering, the user still can receive message.
As can be seen here, the message that prior art can not be such that access device is forwarded for any needs is matched and mistake
Filter, causes the bandwidth of outgoing direction actually arbitrarily large, is limited in the absence of any bandwidth.What if this leak was utilized by malicious user
Words, can resource overdraft to greatest extent, cause ISP（Internet Service Provider, Internet service provider）'s
Service is severely impacted, and problems and hidden danger are brought to the safety of network and management.
The content of the invention
The invention provides a kind of message forwarding method, methods described is applied to be provided with the access device of fast-forwarding table
In, in addition to：
The access device judge received message purpose information whether with the list item in the fast-forwarding table
Match somebody with somebody；
If the list item with the purpose information matches is not present in the fast-forwarding table, the access device forwarding is described
Message, and the fast-forwarding table is saved as by the purpose information is with forwarding link layer header used in the message corresponding
List item；
If there is the list item with the purpose information matches in the fast-forwarding table, the access device is further determined that
The list item is corresponding to forward rule, and forwards regular and described list item to forward or abandon the message according to described.
Accordingly, the invention also provides a kind of access device, the access device is provided with fast-forwarding table, in addition to：
Judge module, for judge received message purpose information whether with the list item in the fast-forwarding table
Match somebody with somebody；
Processing module, for judging to be not present and the purpose information in the fast-forwarding table when the judge module
Forward the message during list item matched somebody with somebody, and by the purpose information with forwarding the corresponding preservation of link layer header used in the message
For the list item of the fast-forwarding table；
Filtering module, for judging exist and the purpose information matches in the fast-forwarding table when the judge module
List item when further determine that the corresponding forwarding rule of the list item, and according to the forwarding is regular and list item forwarding or
Abandon the message.
By applying above technical scheme, access device is receiving the report that purpose information is not matched with fast-forwarding table
Wen Shi, by the purpose information and link layer header used in forwarding the message is preserved into fast-forwarding table, so that follow-up
The message is directly forwarded or abandons according to forwarding rule when receiving the message with the purpose information matches, can be for forwarding
Message is filtered, and is effectively guaranteed the security of network, while also improving the manageability and convenient of message forwarding
Property.
Brief description of the drawings
Fig. 1 is Portal systems composition schematic diagram of the prior art；
Fig. 2 is the application scenarios schematic diagram of existing access device；
Fig. 3 is a kind of schematic flow sheet of message forwarding method proposed by the present invention；
A kind of structural representation for access device that Fig. 4 provides for the present invention.
Embodiment
For in the prior art the problem of inbound traffics carry out completely accurate matching and filtration treatment can not be gone out for equipment,
The present invention proposes a kind of message forwarding method, when receiving the message that purpose information is not matched with fast-forwarding table, will
The purpose information and link layer header used in forwarding the message are preserved into fast-forwarding table, thus it is subsequently received with
Directly forward according to forwarding rule during the message of the purpose information matches or abandon the message, be effectively guaranteed the safety of network
Property, while also improving the manageability and convenience of message forwarding.
In order to elaborate the technological thought of the present invention, the step shown in Fig. 3 is entered below in conjunction with specific application scenarios
Row explanation.It should be noted that before following methods are realized, the present invention needs to set fast-forwarding table in access device,
This is a kind of characteristic information according to data flow（For example including source IP, source port, mesh ground IP, mesh ground port and protocol number
Five-tuple information）The forwarding entry generated in the caches.System is given birth to corresponding fast-forwarding information according to characteristic information and delayed
Packaging information and interface message during forwarding, after subsequent packet is come, the spy that system is checked in message are also recorded for while depositing
Reference ceases, if having hit fast cache, the packaging information in caching directly carries out the encapsulation of Layer 2 data frame, then
Outgoing interface transmission is directly sent in interruption.
Based on arrangement above, a kind of message forwarding method proposed by the present invention is as shown in figure 3, comprise the following steps：
S301, the access device judge received message purpose information whether with the table in the fast-forwarding table
Item matching, if it is not, going to S302；If so, going to S303.
Technical solution of the present invention pre-sets fast-forwarding table in access device, when receiving message, obtains first
Take relative purpose information.Specifically, purpose information refers to purpose IP address and destination slogan（TPC ports or
Udp port）, the information in the purpose information needs to be used for identifying same data flow, with to belonging to the message subsequently arrived
Data flow is screened, and the session of network is all indicated by source IP source port, purpose IP destination interfaces, along with protocol number
Nominal is five-tuple afterwards.Concrete form can be to include source IP address, source port, purpose IP address, destination interface and transmission
The five-tuple information of layer protocol number.
S302, if the list item with the purpose information matches is not present in the fast-forwarding table, the access device turns
Send out message described, and by the purpose information with forwarding used in the message that link layer header is corresponding to save as described quick turn
The list item delivered.
If not having in fast-forwarding table and receiving the list item that the purpose information of message is matched, it is certain data to illustrate the message
The first message of stream, therefore access device is recorded as the link layer header packaged by the message, and generate when forwarding the message
Corresponding relation between the purpose information and the link layer header；After the message is forwarded, the access device will
The corresponding relation is preserved into the fast-forwarding table as list item.
Specifically, the present invention carries out common IP forwardings for first message of data flow, and will be according to the first report
The forwarding-table item that text is found is recorded in interim fast-forwarding Cache pointers, while the link layer for encapsulating the first message
Head is also recorded in interim fast-forwarding Cache pointers, and when message is sent, interim fast-forwarding Cache pointers are added to
In fast-forwarding table.
It should be noted that link layer header mentioned above refer to for the link layer packaging in OSI network hierarchy models
In header, Body information is generally IP messages.Link layer header generally comprises target MAC (Media Access Control) address, source MAC, three layers of association
Discuss type（IP, ARP or IPv6) etc. information.Under concrete implementation scene, because being three layers of forwarding, in incoming interface meeting
Remove link layer header, and new link layer header is Resealed being looked into according to purpose IP after forward table determines outgoing interface（Purpose MAC
For next-hop device（Neighbor device）MAC Address, source MAC for this equipment outgoing interface MAC Address）.
In addition, after list item is generated according to the first message of certain data flow, because the list item only have recorded the data flow
Link layer header needed for the feature of message and forwarding, not yet sets corresponding forwarding rule, so access is set for the list item
It is standby to also need to set corresponding matched indicia for list item, the state of matched indicia is set to not matching completely（I.e. not yet obtain or
Related forwarding rule is set）.
S303, if there is the list item with the purpose information matches in the fast-forwarding table, the access device enters one
Step determines the corresponding forwarding rule of the list item, and forwards regular and described list item to forward or abandon the report according to described
Text.
For the first message of data flow, because access device is turned by common forwarding process
Hair, therefore its purpose information and link layer header can only be got in step s 302, and advised in this flow without forwarding
Matching treatment then, only sets matched indicia in fast-forwarding table.And for the subsequent packet of identical message flow（I.e. with quickly
The message of the list item matching of forward table）, access device then needs to inquire about the state of matched indicia corresponding with list item, depending on matching mark
Differentiation is handled the state of note as follows：
If matched indicia is incomplete matching status, illustrate second message that the message is same data stream, access
Equipment be still unaware of it is corresponding with the data flow forward rule, therefore access device needs to obtain and store corresponding with list item
With rule, if forwarding rule allows the message for forwarding the data flow, access device encapsulates the message recorded in upper list item
Link layer header forwarded；If forwarding rule does not allow the message for forwarding the data flow, access device then loses the message
Abandon.
After such processing is complete, matched indicia is set to complete matching status by access device, so as to continue after treatment
Message when directly according to matched indicia state and forwarding rule handled.
If the matched indicia is complete matching status, access device is corresponding with the list item directly according to what is stored
Matched rule forwarding or abandon the message, without obtaining related forwarding rule again.
To solve above technical problem, the invention also provides a kind of access device, as shown in figure 4, the access device is set
Fast-forwarding table 410 is equipped with, in addition to：
Judge module 420, for judge received message purpose information whether with the table in the fast-forwarding table
Item matching；
Processing module 430, for believing when the judge module judges to be not present in the fast-forwarding table with the purpose
The message is forwarded during the list item for ceasing matching, and the purpose information is corresponding with forwarding link layer header used in the message
Save as the list item of the fast-forwarding table；
Filtering module 440, for judging exist and the purpose information in the fast-forwarding table when the judge module
The list item corresponding forwarding rule is further determined that during the list item of matching, and forwards regular and described list item to turn according to described
Send out or abandon the message.
In specific application scenarios, in addition to mark module, in the processing module 430 by the purpose information
It is that the list item is set after the list item for saving as the fast-forwarding table corresponding with forwarding link layer header used in the message
Corresponding matched indicia is put, the state of the matched indicia is set to not matching completely.
In specific application scenarios, the filtering module 440 matches mark specifically for inquiry is corresponding with the list item
The state of note；
If the matched indicia is incomplete matching status, the filtering module 440 is obtained and stored and the list item pair
The matched rule answered, forwards according to the forwarding rule or abandons the message, and the matched indicia is set into complete matching
State；
If the matched indicia is complete matching status, the filtering module 440 is according to having stored and the list item pair
The matched rule answered forwards or abandoned the message.
In specific application scenarios, the processing module 430, specifically for when forwarding the message, being recorded as institute
The link layer header of message encapsulation is stated, and generates the corresponding relation between the purpose information and the link layer header, and described
After message is forwarded, preserved the corresponding relation as list item into the fast-forwarding table.
In specific application scenarios, in addition to receiving module, for judging received report in the judge module 420
Before whether the purpose information of text matches with the list item in the fast-forwarding table, the message is received, and obtain the message
Purpose information；Wherein, the purpose information includes IP information, protocol information and the port information of the message.
As can be seen here, by apply above technical scheme, access device receive purpose information not with fast-forwarding table
During the message matched, by the purpose information and link layer header used in forwarding the message is preserved into fast-forwarding table,
So as to directly forward according to forwarding rule in the message of the subsequently received and purpose information matches or abandon the message, effectively
Ground ensure that the security of network, while also improving the manageability and convenience of message forwarding.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added to realize by software.Understood based on such, this hair
Bright technical scheme can be embodied in the form of software product, and the software product can be stored in a non-volatile memories
Medium（Can be CD-ROM, USB flash disk, mobile hard disk etc.）In, including some instructions are to cause a computer equipment（Can be
Personal computer, server, or network equipment etc.）Perform the method described in each implement scene of the invention.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram for being preferable to carry out scene, module in accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also carry out one or more dresses that respective change is disposed other than this implement scene
In putting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
The invention described above sequence number is for illustration only, and the quality of implement scene is not represented.
Disclosed above is only several specific implementation scenes of the present invention, and still, the present invention is not limited to this, Ren Heben
What the technical staff in field can think change should all fall into protection scope of the present invention.
Claims (6)
1. a kind of message forwarding method, it is characterised in that methods described is applied to be provided with the access device of fast-forwarding table,
This method includes：
The access device judges whether the purpose information of received message matches with the list item in the fast-forwarding table；
If the list item with the purpose information matches is not present in the fast-forwarding table, the access device forwards the report
Text, and by the purpose information table for saving as the fast-forwarding table corresponding with forwarding link layer header used in the message
；
If there is the list item with the purpose information matches in the fast-forwarding table, the access device further determines that described
The corresponding forwarding rule of list item, and forward regular and described list item to forward or abandon the message according to described；
Wherein, by the purpose information with forwarding used in the message that link layer header is corresponding to save as the fast-forwarding
After the list item of table, in addition to：
Corresponding matched indicia is set for the list item, the state of the matched indicia is set to not matching completely；
The access device further determines that the corresponding forwarding rule of the list item, and according to the forwarding rule forwarding or abandons
The message, be specially：
The access device inquires about the state of matched indicia corresponding with the list item；
If the matched indicia is incomplete matching status, the access device obtains and stores matching corresponding with the list item
Rule, forwards according to the forwarding rule or abandons the message, and the matched indicia is set into complete matching status；
If the matched indicia be complete matching status, the access device according to stored it is corresponding with the list item match
Rule forwarding abandons the message.
2. the method as described in claim 1, it is characterised in that the access device is by the purpose information with forwarding the report
Link layer header correspondence saves as the list item of the fast-forwarding table used in literary, is specially：
The access device is recorded as the link layer header of the message encapsulation when forwarding the message, and generates the purpose
Corresponding relation between information and the link layer header；
After the message is forwarded, the access device is preserved the corresponding relation as list item to the fast-forwarding
In table.
3. the method as described in claim 1, it is characterised in that the purpose letter of received message is judged in the access device
Before whether breath matches with the list item in the fast-forwarding table, in addition to：
The access device receives the message, and obtains the purpose information of the message；
Wherein, the purpose information includes IP information, protocol information and the port information of the message.
4. a kind of access device, it is characterised in that the access device is provided with fast-forwarding table, in addition to：
Judge module, for judging whether the purpose information of received message matches with the list item in the fast-forwarding table；
Processing module, for judging to be not present and the purpose information matches in the fast-forwarding table when the judge module
Forward the message during list item, and by the purpose information with forwarding used in the message that link layer header is corresponding to save as institute
State the list item of fast-forwarding table；
Filtering module, for judging when the judge module in the fast-forwarding table in the presence of the table with the purpose information matches
The list item corresponding forwarding rule is further determined that during item, and forwards regular and described list item to forward or discarding according to described
The message；
Mark module, in the processing module by the purpose information with forwarding link layer header pair used in the message
It is that the list item sets corresponding matched indicia, by the matched indicia after the list item that the fast-forwarding table should be saved as
State be set to completely matching；
Wherein, the filtering module specifically for：
The state of inquiry matched indicia corresponding with the list item；
If the matched indicia is incomplete matching status, the filtering module obtains and stores matching corresponding with the list item
Rule, forwards according to the forwarding rule or abandons the message, and the matched indicia is set into complete matching status；
If the matched indicia be complete matching status, the filtering module according to stored it is corresponding with the list item match
Rule forwarding abandons the message.
5. access device as claimed in claim 4, it is characterised in that
The processing module, specifically for when forwarding the message, being recorded as the link layer header of the message encapsulation, and is generated
Corresponding relation between the purpose information and the link layer header, and after the message is forwarded, the correspondence is closed
System is preserved into the fast-forwarding table as list item.
6. access device as claimed in claim 4, it is characterised in that also include：
Receiving module, for judge in the judge module received message purpose information whether with the fast-forwarding table
In list item matching before, receive the message, and obtain the purpose information of the message；
Wherein, the purpose information includes IP information, protocol information and the port information of the message.
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| CN104052668B (en) * | 2014-05-29 | 2017-10-10 | 汉柏科技有限公司 | The retransmission method and system of a kind of AH messages |
| CN104601468B (en) * | 2015-01-13 | 2018-10-09 | 新华三技术有限公司 | Message forwarding method and equipment |
| CN106330715A (en) * | 2015-06-30 | 2017-01-11 | 杭州华三通信技术有限公司 | Message processing method and device |
| CN106899576A (en) * | 2017-01-20 | 2017-06-27 | 烽火通信科技股份有限公司 | Guest network function realizing method based on home gateway |
| CN107888467B (en) * | 2017-11-20 | 2021-01-01 | 新华三技术有限公司 | Message forwarding method and device based on PPPOE, BRAS and switch |
| EP3713165B1 (en) | 2017-12-11 | 2023-05-31 | Huawei Cloud Computing Technologies Co., Ltd. | Network and network management method |
| CN110278152B (en) * | 2018-08-31 | 2020-05-29 | 新华三信息安全技术有限公司 | Method and device for establishing fast forwarding table |
| CN109474525B (en) * | 2018-12-17 | 2021-05-25 | 杭州迪普科技股份有限公司 | Message processing method, device, equipment and readable storage medium |
| CN111510513B (en) * | 2020-01-03 | 2022-08-30 | 普联国际有限公司 | MAP-E link acceleration method, device, storage medium and network equipment |
| CN113645188B (en) * | 2021-07-07 | 2023-05-09 | 中国电子科技集团公司第三十研究所 | Data packet rapid forwarding method based on security association |
| CN116800672B (en) * | 2023-08-24 | 2024-01-12 | 北京城建智控科技股份有限公司 | Method, device, electronic equipment and storage medium for accelerating message forwarding |
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