CN105591977A - Message processing method and device - Google Patents
Message processing method and device Download PDFInfo
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- CN105591977A CN105591977A CN201510540638.9A CN201510540638A CN105591977A CN 105591977 A CN105591977 A CN 105591977A CN 201510540638 A CN201510540638 A CN 201510540638A CN 105591977 A CN105591977 A CN 105591977A
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Abstract
The invention provides a message processing method and a message processing device. The message processing method comprises the steps of: determining whether a message with same characteristics as an unknown data message has been reported to a controller when receiving the unknown data message; if so, adding the unknown data message to a cache queue; and sending the unknown data message in the cache queue according to a forwarding flow table item issued by the controller when receiving the forwarding flow table item generated by the controller for the unknown data message with the same characteristics. The message processing method and the message processing device effectively reduce the burden of the controller, and improve overall forwarding performance.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of message processing method and device.
Background technology
SDN (SoftwareDefinedNetwork, software defined network) is a kind of novel network architecture,It can separate the chain of command of the network equipment with data surface, realize control by controller (Controller)Surface function processed, and realize data surface function by some switching equipment (Switch).
After controller and switching equipment connect, issue stream list item by controller to switching equipment, to refer toLead the data retransmission of switching equipment to data plane between each main frame. Controller also can issue to switching equipmentTablemiss etc. are with the list item of " outputaction:Controller ", to instruct switching equipment not knowOther data message is encapsulated as Packetin message up sending to controller, and afterwards, controller is by resolving theseThe characteristic of data message, generates corresponding stream list item and is issued on switching equipment, and then instruct these datagramsThe forwarding of literary composition.
But, owing to conventionally having unknown burst flow, that is: the datagram that switching equipment can not be identified in networkLiterary composition, this situation will cause a large amount of data messages to be encapsulated as Packetin message sending to controller,Controller needs to process the data message of a large amount of repetitions, and then has increased the weight of the burden of controller, has reducedThe forwarding performance of entirety.
Summary of the invention
For the defect of prior art, the invention provides a kind of message processing method and device.
The invention provides a kind of message processing method, be applied to the switching equipment in software defined network SDN,In described SDN, also comprise controller, wherein the method comprises:
In the time receiving unknown data message, determine whether existing to there is identical spy with described unknown data messageThe message of property by deliver to controller;
If so, described unknown data message is added into buffer queue;
Be to have after the forwarding flow list item of unknown data message generation of identical characteristics receiving controller, rootThe described forwarding flow list item issuing according to controller sends the unknown data message in buffer queue.
The present invention also provides a kind of message process device, is applied to the switching equipment in software defined network SDN,In described SDN, also comprise controller, this device comprises:
Determining unit, in the time receiving unknown data message, determines whether existing and described unknown dataThe message that message has identical characteristics by deliver to controller;
Adding device, for determining that existing and described unknown data message has the message quilt of identical characteristicsWhile delivering to controller, described unknown data message is added into buffer queue;
Transmitting element, for receive controller be have identical characteristics unknown data message generate turnSend out after stream list item, the described forwarding flow list item issuing according to controller sends the unknown data report in buffer queueLiterary composition.
Message processing method provided by the invention and device, determining the existing unknown data message with receivingThe message with identical characteristics by while delivering to controller, this unknown data message is added into buffer queue,And receiving after the forwarding flow list item that controller issues, send in buffer queue according to this forwarding flow list itemUnknown data message. As can be seen here, the present invention is without all unknown data messages being delivered to controller on allCan complete the forwarding of message, and then effectively reduce the burden of controller, improve overall forwarding performance.
Brief description of the drawings
Fig. 1 is the network environment schematic diagram of a kind of message processing method in the embodiment of the present invention;
Fig. 2 is a kind of message processing method schematic flow sheet in the embodiment of the present invention;
Fig. 3 is a kind of message processing method schematic diagram in the embodiment of the present invention;
Fig. 4 is the logical construction schematic diagram of a kind of message process device in the embodiment of the present invention;
Fig. 5 is the hardware structure schematic diagram of message process device place switching equipment in the embodiment of the present invention.
Detailed description of the invention
For making the application's object, technical scheme and advantage are clearer, referring to accompanying drawing to this ShenPlease scheme be described in further detail.
In order to solve problems of the prior art, the invention provides a kind of message processing method and dressPut.
The applied a kind of network environment of the embodiment of the present invention as shown in Figure 1, in SDN network, comprises controlDevice 100 processed, switching equipment (comprising VSa101, VSb102, VSc103 and VSd104) and connecingThe multiple main frames (comprising VMa105 and VMb106) that enter switching equipment, also comprise multiple on each switching equipmentPort (for example Porta107 on VSa101 and Portb108). Switching equipment can be in esseHardware-switch equipment can be also VS (VirtualSwitch, virtual switch equipment), and main frame can be actual depositingMain frame can be also VM (VirtualMachine, fictitious host computer). Switching equipment shown in Fig. 1 andMain frame is respectively VS and VM.
Please refer to Fig. 2, is the handling process schematic diagram of message processing method provided by the invention, this message processingMethod can be applicable to the switching equipment in SDN network. This message processing method comprises the following steps:
Step 201, in the time receiving unknown data message, determines whether existing and described unknown data message toolThe message that has identical characteristics by deliver to controller;
In practical application, in the time running into a large amount of unknown burst flows, for fear of controller because of need replies largeThe Packetin message of amount and load is overweight, after controller and switching equipment connect, controller canSend the tactful configuration message generating according to default control strategy, this strategy configuration message to switching equipmentMessage format can be joined and is shown in Table 1:
| Ofp_header | Character |
In this message format, the particular content of Ofp_header can be set with reference to OpenFlow consensus standard;In the data structure of Character, carry default control strategy.
The rule that this default control strategy issues according to the service feature carrying in data network for controller, be the data message that belongs to identical characteristics to specify the data message of which kind of feature, and then instruct exchange to establishStandby the feature of data message is calculated, and to belonging to the processing of data message of identical characteristics. Due to controlThe multiple rule that device processed can generate according to multiple business feature, therefore, this control strategy can comprise manyRule, for example:
In IP transmission network environment, can will there is identical sources IP address network segment and/or have as requiredMultiple messages of identical object IP address network segment are appointed as the message with identical characteristics. Correspondingly, for thisCharacteristic and the rule that generates can be: control and there is identical sources IP address network segment and/or there is identical object IPOn the message of address network segment, send;
In the network environment that needs differentiated service, can identical sources port numbers and/or tool will be there is as requiredThere are multiple data messages of identical destination slogan to be appointed as the data message with identical characteristics. Correspondingly,The rule generating for this characteristic can be: control and have identical sources IP address network segment and/or have identical orderIP address network segment message on give;
In the network environment of two layers of forwarding, can identical sources MAC (MediaAccess will be there is as requiredControl, media interviews control) address and/or the multiple messages with identical target MAC (Media Access Control) address are appointed asThere is the message of identical characteristics. Correspondingly, the rule generating for this characteristic can be: control and have phaseWith source MAC and/or have identical target MAC (Media Access Control) address message on send etc.
Switching equipment is receiving after the tactful configuration message that controller issues, and can preserve this strategy configuration reportThe control strategy carrying in literary composition.
Switching equipment receives after data message follow-up, first this data message and the stream list item prestoring is enteredRow coupling, if this data message matches corresponding stream list item, can forward according to corresponding stream list item shouldData message.
But, if this message matches the stream table with " outputaction:Controller " such as tablemiss, can determine that this data message send the unknown data message of controller processing on being.
Process in order to alleviate controller the burden that a large amount of unknown data messages causes, in the embodiment of the present invention alsoDirectly will on this data message, not deliver to controller, but obtain the characteristic information of this unknown data message, exampleAs the source IP address of message and object IP address, and the control strategy of this characteristic information and preservation is carried outJoin.
In the time of any rule in miss this control strategy of characteristic information of this unknown data message, sayBright this unknown data message is not the message with other messages with identical characteristics, can be according to prior artIn this unknown data message is encapsulated as to Packetin message up sending to controller processing.
When the characteristic information of this unknown data message has hit in control strategy corresponding when regular, further trueThe message whether fixed existing and described unknown data message have identical characteristics by deliver to controller.
Determine whether message that existing and described unknown data message have identical characteristics by deliver to controling applianceComprise: while receiving unknown data message, extract the characteristic information of unknown data message body; More unknownThe characteristic information of data message and record on send the characteristic information of message of controller whether consistent; If oneCause, determine message that existing and unknown data message have identical characteristics by deliver to controller.
Under normal circumstances, can the regular first unknown data message (head of correspondence in control strategy will have been hitMessage) be encapsulated as Packetin message up sending to controller so that controller according to this literary composition of reporting for the first time under bristle with angerLead the forwarding flow list item that subsequent packet forwards.
Meanwhile, send reporting for the first time of controller civilian characteristic information on can also recording in the embodiment of the present invention, afterContinue while receiving again unknown data message, extract the characteristic information of unknown data message, and according to unknown dataThe characteristic information of message and record on send the comparing result of the characteristic information of the message of controller to determine to beThe message that no existing and unknown data message have identical characteristics by deliver to controller.
The present invention is preferably in embodiment, will hit regular first unknown number corresponding in control strategyBe encapsulated as Packetin message up sending to controller according to message (literary composition of reporting for the first time), also can on, send controlThe literary composition rule of hitting of reporting for the first time of device is carried out mark, follow-up while receiving unknown data message again, if unknown numberThe rule of hitting according to message had been carried out mark, determined that existing and unknown data message has identical characteristicsMessage by deliver to controller.
If that is: the characteristic information of unknown data message has hit the rule of correspondence in control strategy, and this correspondenceRule carried out mark, determine the characteristic information of unknown data message and record on send the report of controllerThe characteristic information of literary composition is consistent, determine message that existing and unknown data message have identical characteristics by deliver to controlDevice processed; If the characteristic information of unknown data message has hit the rule of correspondence in control strategy, but this correspondenceRule do not carried out mark, do not determine not the message that there are identical characteristics with unknown data message by deliver toController.
Step 202, determine message that existing and described unknown data message have identical characteristics by deliver to controlWhen device processed, described unknown data message is added into buffer queue;
Do not determine not the message that there are identical characteristics with unknown data message by while delivering to controller, canThis unknown data message is encapsulated as to Packetin message up sending to controller so that controller according to this notPrimary data message issues the forwarding flow list item that instructs subsequent packet to forward. And, to this unknown in control strategyThe rule that data message hits is carried out mark, or on record, delivers to the feature of the unknown data message of controllerInformation, with characterize have with the message of this rule characteristic of correspondence information by send controller.
The characteristic information of unknown data message and record on send the characteristic information of message of controller consistentTime, illustrate message that existing and unknown data message have identical characteristics by deliver to controller, so, willThis message is added in the buffer queue of the rule correspondence being hit and carries out buffer memory, and waits for root of hair under controllerAccording to this unknown data message have identical characteristics message generate forwarding flow list item.
Step 203 is the forwarding flow table with the unknown data message generation of identical characteristics receiving controllerXiang Hou, the described forwarding flow list item issuing according to controller sends the unknown data message in buffer queue.
Receive controller basis at switching equipment (following with the message that unknown data message has identical characteristicsBe called the literary composition of reporting for the first time) after the forwarding flow list item that generates, can be by corresponding with this literary composition rule of hitting of reporting for the first time slowThe message of depositing buffer memory in queue mates with this forwarding flow list item successively, and by the unknown data message of couplingForward according to this forwarding flow list item.
But, if the unknown data message in this buffer queue does not mate with this forwarding flow list item, illustrate that this is notAlthough primary data message is with the literary composition of reporting for the first time for having the message of identical characteristics, both specific features are not completeComplete consistent. For example, (control strategy hitting is corresponding with the civilian identical characteristics of reporting for the first time for this unknown data messageRule) be: there is identical source IP address network segment 1.1.1-225, but the inbound port of this message is Porta,And the civilian inbound port of reporting for the first time is Portb, the controller forwarding flow table item matching domain that literary composition issues according to reporting for the first time enter endMouth is Porta, and therefore, this unknown data message cannot mate this forwarding flow list item, that is: this unknown number completelyStill can not hit this forwarding flow list item according to message.
Now, be first can not hitting in buffer queue if can not hit the unknown data message of forwarding flow list itemThe unknown data message of this forwarding flow list item, is encapsulated as Packetin message up sending by this unknown data messageTo controller, so that controller is according to again issuing with the unmatched first unknown data message of forwarding flow list itemNew stream list item.
Afterwards, receiving after the new stream list item that controller issues again, by this buffer queue otherThe unknown data message that can not mate with forwarding flow list item carries out with this new stream list item again issuing successivelyJoin, and the unknown data message of coupling is forwarded according to the new stream list item again issuing, and with reference to upperStating flow process continues the first unknown data message up sending not mating to controller, until preserve in buffer queueUnknown data message be all forwarded till.
Below in conjunction with Fig. 3, the embodiment of the present invention is further illustrated.
Suppose, switching equipment VSa101 receives a large amount of unknown data messages, is respectively message 1, message2, message 3 ... message n, and this message 1, message 2, message 3 ... message n is the report with identical characteristicsLiterary composition, for example, the identical characteristics that have are: source IP address network segment 1.1.0.1-255.
Successively to the message of reception is mated in the stream list item prestoring.
In the time matching the stream list item of tablemiss in the stream list item that message 1 is prestoring, determine that this message 1 isOn needs, send the unknown data message of controller, can be first message 1 and the control strategy prestoring be carried outJoin, when message 1 hits any rule in this control strategy, and determine do not have and described unknown dataWhen the message that message has identical characteristics is above delivered to controller, (that is: message 1 hits in this control strategyRule is not labeled, or does not record the characteristic information of this message 1), determine that this message 1 is for hitting control planThe literary composition of reporting for the first time slightly, and this message 1 is encapsulated as to Packetin message up sending to controller, so that controller rootGenerate corresponding forwarding flow list item according to this message 1. Meanwhile, to sending the message 1 of controller in control strategy onThe rule of hitting is carried out mark, or records the characteristic information of this message 1.
Owing to being issued to VSa101 needs by delivering to controller on message 1 and generating forwarding flow list item by controllerRegular hour, during this period, VSa101 can be in order by message 2, message 3 ... message n successivelyIn the stream list item prestoring, mate.
Suppose, while coupling, still match the stream of tablemiss in the stream list item that message 2 is being prestoredList item, can mate message 2 with the control strategy prestoring, because message 2 and message 1 have phaseSame characteristic, 2 of messages can hit the rule in the control strategy that message 1 hits, and due to message 2Rule in the control strategy hitting is labeled, so, can determine to have to have identical with message 2The message of characteristic by deliver to controller, message 2 can be added into so to the control plan of hitting with message 2In the buffer queue of the rule correspondence slightly.
If VSa101 receives the forwarding flow list item that controller issues according to message 1 at this moment, can be first byMessage 2 in buffer queue mates with this forwarding flow list item, when message 2 matches this forwarding flow list itemTime, can forward message 2 according to this forwarding flow list item.
Afterwards, message 3 ... message n etc. does not also carry out the message of overmatching, can enter with this forwarding flow list item yetRow coupling, in the time matching this forwarding flow list item, forwards message according to forwarding flow list item, without againBy its match control strategy. If message 3 ... the message that message n etc. does not also carry out overmatching does not match forwarding flowList item, buffer queue corresponding to the message that hits control strategy adds to according to above-mentioned flow process, and continuesBy not coupling first unknown data message up sending to controller, until the unknown data of preserving in buffer queueTill message is all forwarded.
In sum, message processing method provided by the invention, is determining the existing unknown data report with receivingThe message that stationery has identical characteristics by while delivering to controller, this unknown data message is added into buffer queue,And receiving after the forwarding flow list item that controller issues, send in buffer queue according to this forwarding flow list itemUnknown data message. As can be seen here, the present invention is without all unknown data messages being delivered to controller on allCan complete the forwarding of message, and then effectively reduce the burden of controller, improve overall forwarding performance.
The present invention also provides a kind of message process device, the structural representation that Fig. 4 is this message process device,This device can be applied to the switching equipment in SDN network, also comprises controller in SDN, this message processingDevice can comprise determining unit 401, adding device 402 and transmitting element 403, wherein:
Determining unit 401, in the time receiving unknown data message, determines whether existing and described unknown numberThe message according to message with identical characteristics by deliver to controller;
Adding device 402, for determining that existing and described unknown data message has the message quilt of identical characteristicsOn while delivering to controller, described unknown data message is added into buffer queue;
Transmitting element 403, for receive controller be have identical characteristics unknown data message generateAfter forwarding flow list item, the described forwarding flow list item issuing according to controller sends the unknown data in buffer queueMessage.
Further, described device can also comprise and send unit 404, for determining not and described the unknownThe message that data message has identical characteristics by while delivering to controller, described unknown data message is encapsulated asPacketin message up sending is to controller, so that controller generates forwarding flow table according to described unknown data messageItem is issued to described switching equipment.
Further, described device also comprises receiving element 405, the strategy sending for receiving described controllerConfiguration message, carries described default control strategy in described tactful configuration message.
Further, described determining unit 401 specifically can be for extracting the feature of described unknown data messageInformation; Described characteristic information is mated with default control strategy; If described in described characteristic information hitsDefault control strategy, the characteristic information of more described unknown data message and record on send controllerWhether the characteristic information of message is consistent; If consistent, determine to have to there is identical spy with described unknown data messageThe message of property by deliver to controller.
Further, described transmitting element 403 can also be used for the described unknown number of described buffer queueMate with described forwarding flow list item according to message; If the described unknown data message in described buffer queue withDescribed forwarding flow list item coupling, sends the described unknown data message in buffer queue according to this forwarding flow list item;If the described unknown data message in described buffer queue does not mate with described forwarding flow list item, by described buffer memoryIn queue, be encapsulated as Packetin message up sending with the unmatched first unknown data message of described forwarding flow list itemTo controller, so that controller is according to issuing new with the unmatched first unknown data message of forwarding flow list itemStream list item.
The present invention is applied to the message process device of switching equipment can be with above-mentioned in concrete handling processThe handling process of message processing method is consistent, does not repeat them here.
Said apparatus can be realized by software, also can realize by hardware message process device of the present inventionThe hardware structure schematic diagram of the place network equipment all can be with reference to shown in figure 5, and its basic hardware environment comprises central authoritiesProcessor CPU, forwarding chip, memory and other hardware, wherein memory device comprises machine readableInstruction, CPU reads and carries out the function of each unit in machine readable instructions execution graph 4.
From the embodiment of above the whole bag of tricks and device, can find out the message that the embodiment of the present invention providesProcessing method and device, determining that unknown data message existing and that receive has the message quilt of identical characteristicsOn while delivering to controller, this unknown data message is added into buffer queue, and issues receiving controllerForwarding flow list item after, send the unknown data message in buffer queue according to this forwarding flow list item. Thus canSee, the present invention, without forwarding that all unknown data messages are delivered to controller on all can complete message, entersAnd effectively reduce the burden of controller, improve overall forwarding performance.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all at thisWithin the spirit and principle of invention, any amendment of making, be equal to replacement, improvement etc., all should be included inWithin the scope of protection of the invention.
Claims (10)
1. a message processing method, is applied to the switching equipment in software defined network SDN, described SDNIn also comprise controller, it is characterized in that, described method comprises:
In the time receiving unknown data message, determine whether existing to there is identical spy with described unknown data messageThe message of property by deliver to controller;
If so, described unknown data message is added into buffer queue;
Be to have after the forwarding flow list item of unknown data message generation of identical characteristics receiving controller, rootThe described forwarding flow list item issuing according to controller sends the unknown data message in buffer queue.
2. the method for claim 1, is characterized in that, described method also comprises:
The message that there are identical characteristics with described unknown data message if do not determine not by deliver to controller, willDescribed unknown data message is encapsulated as Packetin message up sending to controller, so that controller is according to describedPrimary data message generates forwarding flow list item and is issued to described switching equipment.
3. the method for claim 1, is characterized in that, described method also comprises:
Receive the tactful configuration message that described controller sends, in described tactful configuration message, carry defaultControl strategy.
4. the method as described in claim 1 or 3, is characterized in that, described in determine whether existing and describedThe message that primary data message has identical characteristics by deliver to controller and specifically comprise:
Extract the characteristic information of described unknown data message;
Described characteristic information is mated with default control strategy;
If described characteristic information hits described default control strategy, the feature of more described unknown data messageInformation and record on send the characteristic information of message of controller whether consistent;
If consistent, determine message that existing and described unknown data message have identical characteristics by deliver to controlDevice.
5. the method for claim 1, is characterized in that, described according to this forwarding flow list item transmission buffer memoryDescribed unknown data message in queue specifically comprises:
Described unknown data message in described buffer queue is mated with described forwarding flow list item;
If the described unknown data message in described buffer queue mates with described forwarding flow list item, turn according to thisSend out stream list item and send the described unknown data message in buffer queue;
If the described unknown data message in described buffer queue does not mate with described forwarding flow list item, described in inciting somebody to actionIn buffer queue, be encapsulated as Packetin message with the unmatched first unknown data message of described forwarding flow list itemOn deliver to controller so that controller is according to issuing with the unmatched first unknown data message of forwarding flow list itemNew stream list item.
6. a message process device, is applied to the switching equipment in software defined network SDN, described SDNIn also comprise controller, it is characterized in that, described device comprises:
Determining unit, in the time receiving unknown data message, determines whether existing and described unknown dataThe message that message has identical characteristics by deliver to controller;
Adding device, for determining that existing and described unknown data message has the message quilt of identical characteristicsWhile delivering to controller, described unknown data message is added into buffer queue;
Transmitting element, for receive controller be have identical characteristics unknown data message generate turnSend out after stream list item, the described forwarding flow list item issuing according to controller sends the unknown data report in buffer queueLiterary composition.
7. device as claimed in claim 6, is characterized in that, described device also comprises:
On send unit, for do not determine not the message that there are identical characteristics with described unknown data message byWhile delivering to controller, described unknown data message is encapsulated as to Packetin message up sending to controller, so thatController generates forwarding flow list item according to described unknown data message and is issued to described switching equipment.
8. method as claimed in claim 6, is characterized in that, described device also comprises:
Receiving element, the tactful configuration message sending for receiving described controller, described tactful configuration messageIn carry described default control strategy.
9. the device as described in claim 6 or 8, is characterized in that, described determining unit specifically for:
Extract the characteristic information of described unknown data message;
Described characteristic information is mated with default control strategy;
If described characteristic information hits described default control strategy, the feature of more described unknown data messageInformation and record on send the characteristic information of message of controller whether consistent;
If consistent, determine message that existing and described unknown data message have identical characteristics by deliver to controlDevice.
10. device as claimed in claim 6, is characterized in that, described transmitting element specifically for:
Described unknown data message in described buffer queue is mated with described forwarding flow list item;
If the described unknown data message in described buffer queue mates with described forwarding flow list item, turn according to thisSend out stream list item and send the described unknown data message in buffer queue;
If the described unknown data message in described buffer queue does not mate with described forwarding flow list item, described in inciting somebody to actionIn buffer queue, be encapsulated as Packetin message with the unmatched first unknown data message of described forwarding flow list itemOn deliver to controller so that controller is according to issuing with the unmatched first unknown data message of forwarding flow list itemNew stream list item.
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| CN104468636A (en) * | 2015-01-09 | 2015-03-25 | 李忠 | SDN structure for DDoS threatening filtering and link reallocating and working method |
| CN104821923A (en) * | 2015-05-15 | 2015-08-05 | 杭州华三通信技术有限公司 | Method and device for transmitting upper-supply controller protocol message in SDN network |
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