CN108521372A - A kind of method and device for realizing application-oriented routing based on Open vSwitch - Google Patents
A kind of method and device for realizing application-oriented routing based on Open vSwitch Download PDFInfo
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- CN108521372A CN108521372A CN201810144331.0A CN201810144331A CN108521372A CN 108521372 A CN108521372 A CN 108521372A CN 201810144331 A CN201810144331 A CN 201810144331A CN 108521372 A CN108521372 A CN 108521372A
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- application protocol
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- value pair
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Classifications
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- 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
- H04L45/38—Flow based routing
-
- 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
- H04L45/74—Address processing for routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2475—Traffic characterised by specific attributes, e.g. priority or QoS for supporting traffic characterised by the type of applications
Abstract
The present invention provides a kind of method for realizing application-oriented routing based on Open vSwitch, the method includes：Receive and identify application protocol；The application protocol and port numbers are formed into key-value pair；The type of the application protocol is determined according to the port numbers in the key-value pair and key-value pair；Corresponding strategy is issued according to the type of the application protocol.The present invention also provides a kind of devices for realizing application-oriented routing based on Open vSwitch.Connected applications identification technology of the present invention and based on Open vSwitch flow table rule, it converts identification to flow table rule using characteristic information, it is issued to Open vSwitch by Openflow agreements, to control device flow, its flow table rule is realized simply, and is handled convenient for network-control unified planning, when changing using characteristic information, can timely update processing, independent of TCAM.
Description
Technical field
The present invention relates to data traffic control fields, more particularly to a kind of Open vSwitch that are based on to realize application-oriented road
By method and device.
Background technology
With the continuous renewal of network application, the problem of network application, becomes increasingly complex, to the traffic differentiation of network application
The demand of processing is more important.Certain uncontrolled applications must be identified and control its flow, otherwise can be tied up
Normal Internet resources influence the normal work of enterprise.
Feature or type of the traditional network based on data packet are applied to identify, and the forwarding behavior of control data bag, to
Achieve the purpose that control application traffic.Type of data packet in network has many such as HTTP, the data packets such as TELNET, these biographies
System application all uses the reserved port of acquiescence, such as HTTP that 80 ports, TELNET is used to use 23 ports etc..Based on port
Application layer protocol is identified in mapping mechanism, controls the outlet of its data packet, to achieve the purpose that flow control.
In addition to this also have and be based on DPI (Deep Packet Inspection deep-packet detections) and DFI (Deep Flow
Inspection deep streams detect) realize application identification technology, issue corresponding acl rule based on these recognition results, from
And achieve the purpose that control application traffic.
The means of wherein control flow are mainly to be realized using TCAM hardware by ACL, TCAM (ternary
Content addressable memory) it is a kind of three-state content addressing memory, it is mainly used for quickly searching ACL, routing
Equal list items.
Current existing method is to identify corresponding application by application identification technology, then issues corresponding acl rule,
To achieve the purpose that control application traffic, but the realization of ACL is necessarily dependent upon TCAM hardware at present, if TCAM exhausts,
It would be possible that can be forwarded by cpu, lower data packet forwarding performance.When changing using feature, in conventional methods where
Cannot policybased routing be reconfigured according to using feature in time.Consequently, it is possible to uncontrollable application is caused to tie up Internet resources, shadow
Ring normal work.
Invention content
One of to solve above-mentioned technical problem, the present invention provides one kind realizing application-oriented road based on Open vSwitch
By method, the method includes：
Receive and identify application protocol；
The application protocol and port numbers are formed into key-value pair；
The type of the application protocol is determined according to the port numbers in the key-value pair and key-value pair；
Corresponding strategy is issued according to the type of the application protocol.
Preferably, the process for receiving and identifying application protocol includes：
Receive application protocol；
Judge whether the port numbers of the application protocol are to immobilize, and are, then identify the application protocol using port mode,
It is no, then the application protocol is identified using DPI feature recognition modes.
Preferably, the port numbers according in the key-value pair and key-value pair determine the type of the application protocol
Process includes：
The correspondence between pre-stored application protocol and port is obtained according to the port numbers in the key-value pair；
Judge to whether there is the key-value pair middle port in the correspondence between the pre-stored application protocol and port
Correspondence number between application protocol, no, then the type of the application protocol is new, the key-value pair is stored in described
In correspondence between pre-stored application protocol and port.
Preferably, the port numbers according in the key-value pair and key-value pair determine the type of the application protocol
Process further includes：
When in the correspondence between the pre-stored application protocol and port there are the key-value pair middle-end slogan with answer
When with correspondence between agreement, the type of the application protocol is old.
Preferably, issuing corresponding tactful process according to the type of the application protocol includes：
When the type of the application protocol is new, strategy corresponding with the application protocol is directly issued；
When the application protocol type be the old times, judge whether the key-value pair identical as pre-stored key-value pair, is, then
Selection is issued with the strategy corresponding to the pre-stored key-value pair, no, then deletes and update described pre-stored
Strategy corresponding to key-value pair, while issuing updated strategy.
Preferably, the distributing policy is converted into Flow-Mod message, and transformed Flow-Mod message is sent
To external reception equipment.
One of to solve above-mentioned technical problem, it is application-oriented based on Open vSwitch realizations that the present invention also provides one kind
The device of routing, described device include：Application recognition module, controller module and execution module；
The application recognition module, for receiving and identifying application protocol, while by the application protocol and port numbers group bonding
Value is to being sent to control module；
The controller module, the key-value pair for receiving application recognition module transmission, and according to the key-value pair and key assignments
The port numbers of centering determine the type of the application protocol, while corresponding plan is issued according to the type of the application protocol
Slightly；
The execution module for the distributing policy to be converted to Flow-Mod message, and transformed Flow-Mod is disappeared
Breath is sent in external reception equipment.
Preferably, the application recognition module is specifically additionally operable to receive application protocol, judges the port of the application protocol
Number whether it is to immobilize, is that the application protocol is then identified using port mode, it is no, then known using DPI feature recognition modes
The not described application protocol.
Preferably, the controller module is specifically additionally operable to：
The correspondence between pre-stored application protocol and port is obtained according to the port numbers in the key-value pair；
Judge to whether there is the key-value pair middle port in the correspondence between the pre-stored application protocol and port
Correspondence number between application protocol, no, then the type of the application protocol is new, the key-value pair is stored in described
In correspondence between pre-stored application protocol and port；It is that then the type of the application protocol is old.
Preferably, the controller module is specifically additionally operable to：
When the type of the application protocol is new, strategy corresponding with the application protocol is directly issued；
When the application protocol type be the old times, judge whether the key-value pair identical as pre-stored key-value pair, is, then
Selection is issued with the strategy corresponding to the pre-stored key-value pair, no, then deletes and update described pre-stored
Strategy corresponding to key-value pair, while issuing updated strategy.
Beneficial effects of the present invention are as follows：
Connected applications identification technology of the present invention and based on Open vSwitch flow table rule, by identification application characteristic information turn
Flow table rule is turned to, Open vSwitch are issued to by Openflow agreements, to control device flow, flow table rule is real
It is now simple, and handled convenient for network-control unified planning, when changing using characteristic information, can timely update place
Reason, independent of TCAM.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and constitutes the part of the present invention, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the method for the embodiment of the present invention；
Fig. 2 is the schematic diagram of described device of the embodiment of the present invention.
Specific implementation mode
In order to make technical solution in the embodiment of the present invention and advantage be more clearly understood, below in conjunction with attached drawing to the present invention
Exemplary embodiment be described in more detail, it is clear that described embodiment be only the present invention a part implement
Example, rather than the exhaustion of all embodiments.It should be noted that in the absence of conflict, embodiment and reality in the present invention
The feature applied in example can be combined with each other.
The present embodiment proposes a kind of method for realizing application-oriented routing based on Open vSwitch, the method packet
It includes：
S101 receives and identifies application protocol, and the application protocol and port numbers are formed key-value pair.
Specifically, the present embodiment is combined using identification technology and the rule of the flow table based on Open vSwitch.Wherein institute
The process for stating identification application protocol is the traditional and ripe technology of comparison, a variety of identification technologies is be combined with each other, so as to reach
To preferably using recognition effect.For the changeless application of some port numbers, then directly applied using port mode
The identification of agreement.Simultaneously by the form of port numbers and application composition key-value pair, such as Map<23, TELNET>；And it is new for some
Type application then simply cannot utilize aforesaid way to identify application protocol, it is necessary to complete to identify using feature identification techniques such as DPI
Process, DPI technologies go out application protocol to comprehensive descision mainly in combination with " fingerprint " of different application agreement.When passing through DPI
After technology identifies application protocol, in order to be preferably subsequent flow services, also need to be translated into port numbers and application
Key-value pair form, output form is unified with this.
S102 determines the type of the application protocol according to the port numbers in the key-value pair and key-value pair, according to institute
The type for stating application protocol issues corresponding strategy.
Specifically, the present embodiment the method is in the process of implementation, all applications association identified at present is prestored
The correspondence of negotiation port, when receiving the key-value pair exported in S101, according to corresponding pass stored at present
System carries out it different operations.First, it according to the key-value pair exported in S101, goes to prestore described in acquisition according to port numbers
All application protocols and port correspondence, if in the correspondence be not present the port numbers, then it is assumed that this is answered
With for newly identified application, the application protocol and the correspondence of port are then stored, corresponding strategy is then issued.If
The port numbers are had found in the correspondence of pre-stored all application protocols and port, then being prestored with regard to comparing
Key-value pair, i.e. Map<Port, application>, it is whether identical as the key-value pair that is exported in S101, if identical, need not carry out
Processing, according to formulating policy control application traffic corresponding with pre-stored key-value pair before.If it is not the same,
Then illustrate that the feature of application is changed, then existing delete existing strategy, and update new strategy and issued,
To achieve the purpose that control application traffic in time.
The distributing policy is converted to Flow-Mod message, and transformed Flow-Mod message is sent to by S103
In external reception equipment.
Specifically, after generating corresponding strategy, it is necessary to be answered that could be controlled after policy distribution to Open vSwitch
Traffic behavior, therefore, it is necessary to will be issued in corresponding equipment after the strategy issued is converted to Flow-Mod message.
Corresponding, the present embodiment also proposed a kind of device for realizing application-oriented routing based on Open vSwitch, institute
Stating device includes：Application recognition module, controller module and execution module；
The application recognition module, for receiving and identifying application protocol, while by the application protocol and port numbers group bonding
Value is to being sent to control module；
The controller module, the key-value pair for receiving application recognition module transmission, and according to the key-value pair and key assignments
The port numbers of centering determine the type of the application protocol, while corresponding plan is issued according to the type of the application protocol
Slightly；
The execution module for the distributing policy to be converted to Flow-Mod message, and transformed Flow-Mod is disappeared
Breath is sent in external reception equipment.
Specifically, the present embodiment described device is combined using identification technology and the rule of the flow table based on Open vSwitch
Then, it is converted and is issued accordingly by controller module, to achieve the purpose that quickly to control application traffic.It is wherein described
What application recognition module used is exactly more traditional and ripe technology, and a variety of identification technologies are be combined with each other, so as to application knowledge
Other module, which can reach, preferably applies recognition effect.For the changeless application of some port numbers, then port is directly used
Mode carries out the identification of application protocol.The form of port numbers and application composition key-value pair is passed into controller module, example simultaneously
Such as Map<23, TELNET>；And for some new applications, then it cannot simply utilize aforesaid way to identify application protocol, it is necessary to adopt
The identification function of application recognition module is completed with feature identification techniques such as DPI, DPI technologies are mainly in combination with different application agreement
" fingerprint " go out application protocol to comprehensive descision.After identifying application protocol by DPI technologies, in order to preferably with
Controller module is corresponded to, and is also needed to be translated into port numbers and the key-value pair form of application, is unified output form with this.
In the process of implementation, controller module prestores all applications identified at present to the present embodiment the method
The correspondence of agreement and port, when receiving the key-value pair of application recognition module output, controller module is according to mesh
Preceding stored correspondence carries out it different operations.First, the key-value pair exported according to application recognition module, according to
Port numbers go to obtain the correspondence of pre-stored all application protocols and port in controller module, if controller module
Described in the port numbers are not present in correspondence, then it is assumed that the application is newly identified application, described in controller module storage
Then the correspondence of application protocol and port issues corresponding strategy.If at pre-stored all application protocols and end
The port numbers are had found in the correspondence of mouth, then just comparing pre-stored key-value pair, i.e. Map<Port, application>, with
Whether the key-value pair exported in S101 is identical, if identical, need not be handled, according to formulating and prestore before
The corresponding policy control application traffic of key-value pair.If it is not the same, then illustrate that the feature of application is changed, that
It is existing to delete existing strategy, and update new strategy and issued, to reach the mesh of control application traffic in time
's.
When the application characteristic information and configuration information that controller module is provided according to application recognition module generate corresponding answer
After strategy, it is necessary to will could control the traffic behavior of application after policy distribution to Open vSwitch, therefore, it is necessary to will wait for
The strategy issued is issued to after being converted to Flow-Mod message in corresponding equipment.
The present invention is by connected applications identification technology and the flow table rule based on Open vSwitch, by controller by answering
It is distinguished and is applied with identification technology, and convert its characteristic information to corresponding Flow rules, be sent to by Openflow agreements
On Open vSwitch, to control the flow of application, when the feature of application changes, controller module can convert in time
Rule Information reformulates flow table rule.Because the interactive process of Openflow agreements takes seldom, Flow-Mod message is in net
Network in order in the case of substantially ms ranks, therefore the timeliness of the present invention can be more preferable compared to conventional method.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of method for realizing application-oriented routing based on Open vSwitch, which is characterized in that the method includes：
Receive and identify application protocol；
The application protocol and port numbers are formed into key-value pair；
The type of the application protocol is determined according to the port numbers in the key-value pair and key-value pair；
Corresponding strategy is issued according to the type of the application protocol.
2. according to the method described in claim 1, it is characterized in that, the process for receiving and identifying application protocol includes：
Receive application protocol；
Judge whether the port numbers of the application protocol are to immobilize, and are, then identify the application protocol using port mode,
It is no, then the application protocol is identified using DPI feature recognition modes.
3. according to the method described in claim 1, it is characterized in that, the port according in the key-value pair and key-value pair
Number determine that the process of the type of the application protocol includes：
The correspondence between pre-stored application protocol and port is obtained according to the port numbers in the key-value pair；
Judge to whether there is the key-value pair middle port in the correspondence between the pre-stored application protocol and port
Correspondence number between application protocol, no, then the type of the application protocol is new, the key-value pair is stored in described
In correspondence between pre-stored application protocol and port.
4. according to the method described in claim 3, it is characterized in that, the port according in the key-value pair and key-value pair
Number determine that the process of the type of the application protocol further includes：
When in the correspondence between the pre-stored application protocol and port there are the key-value pair middle-end slogan with answer
When with correspondence between agreement, the type of the application protocol is old.
5. according to the method described in claim 4, it is characterized in that, issuing corresponding plan according to the type of the application protocol
Slightly process include：
When the type of the application protocol is new, strategy corresponding with the application protocol is directly issued；
When the application protocol type be the old times, judge whether the key-value pair identical as pre-stored key-value pair, is, then
Selection is issued with the strategy corresponding to the pre-stored key-value pair, no, then deletes and update described pre-stored
Strategy corresponding to key-value pair, while issuing updated strategy.
6. method according to any one of claims 1 to 5, which is characterized in that the method further includes：Plan is issued by described
Flow-Mod message is slightly converted to, and transformed Flow-Mod message is sent in external reception equipment.
7. a kind of device for realizing application-oriented routing based on Open vSwitch, which is characterized in that described device includes：Using
Identification module, controller module and execution module；
The application recognition module, for receiving and identifying application protocol, while by the application protocol and port numbers group bonding
Value is to being sent to control module；
The controller module, the key-value pair for receiving application recognition module transmission, and according to the key-value pair and key assignments
The port numbers of centering determine the type of the application protocol, while corresponding plan is issued according to the type of the application protocol
Slightly；
The execution module for the distributing policy to be converted to Flow-Mod message, and transformed Flow-Mod is disappeared
Breath is sent in external reception equipment.
8. device according to claim 7, which is characterized in that the application recognition module is specifically additionally operable to receive application association
View, judges whether the port numbers of the application protocol are to immobilize, and are, then identify the application protocol using port mode,
It is no, then the application protocol is identified using DPI feature recognition modes.
9. device according to claim 7, which is characterized in that the controller module is specifically additionally operable to：
The correspondence between pre-stored application protocol and port is obtained according to the port numbers in the key-value pair；
Judge to whether there is the key-value pair middle port in the correspondence between the pre-stored application protocol and port
Correspondence number between application protocol, no, then the type of the application protocol is new, the key-value pair is stored in described
In correspondence between pre-stored application protocol and port；It is that then the type of the application protocol is old.
10. device according to claim 9, which is characterized in that the controller module is specifically additionally operable to：
When the type of the application protocol is new, strategy corresponding with the application protocol is directly issued；
When the application protocol type be the old times, judge whether the key-value pair identical as pre-stored key-value pair, is, then
Selection is issued with the strategy corresponding to the pre-stored key-value pair, no, then deletes and update described pre-stored
Strategy corresponding to key-value pair, while issuing updated strategy.
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