CN103475586B - The retransmission method of network data message, Apparatus and system - Google Patents
The retransmission method of network data message, Apparatus and system Download PDFInfo
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- CN103475586B CN103475586B CN201310374283.1A CN201310374283A CN103475586B CN 103475586 B CN103475586 B CN 103475586B CN 201310374283 A CN201310374283 A CN 201310374283A CN 103475586 B CN103475586 B CN 103475586B
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Abstract
The retransmission method, the Apparatus and system that the invention provides a kind of network data message, method wherein comprises: obtain the data message in data flow according to received data flow; Carry out NAT strategy matching according to the first data message in data flow, set up NAT transformational relation table; According to five-tuple information and NAT transformational relation table before and after other data message conversion except first data message in data flow, determine the corresponding CPU forwarding of other data message except first data message. By the present invention, having or not under NAPT/NAT scene, can ensure that the data message in same data flow is distributed to identical CPU to be processed, reduce use and the CPU of lock? cache shake, the performance of lifting forwarded.
Description
Technical field
The present invention relates to computer communication technology field, more specifically, relate to a kind of network data messageRetransmission method, Apparatus and system.
Background technology
RPS(ReceivePacketSteering) be the technology of the many queues of a kind of software simulation hardware network interface card,Sort out by the Hash to IP traffic, the data message of same IP stream is distributed to identical CPU and enterRow is processed, and the load balancing of the soft interruption that has realized network protocol stack on many CPU, has promoted list greatlyThe performance of many CPU of queue network interface card network forwarding equipment.
But when really having understood after the operation principle and realization flow of RPS module, be not difficult to find that it is currentRealization exist a critical defect: the topology that cannot support to exist network address translation.
Network address translation (NetworkAddressTranslation is called for short NAT) is that one (is protected privately ownedStay) switch technology that address spaces is legitimate ip address, it is widely used in all kinds InternetIn access way and various types of network. It has ideally solved the problem of shortage of ip address, Er QieyouAvoid to effect the attack of network-external, hidden the also computer of protecting network inside. NAT can be simpleBe divided into conversion (basic NAT), basic network address and port translation (NAPT) between basic network addressTwo kinds.
We have a look the problem of the application records of RPS module under NAT scene, below with NAPTFor example.
Fig. 1 shows the network topology structure of RPS module application under NAPT scene. As shown in Figure 1,Client is carried out the rear access services device of NAPT conversion by network forwarding equipment. Transformation rule is as follows:
1）1.1.1.1（1025）->103.1.1.69（4000）
2）1.1.1.1（1026）->103.1.1.69（4001）
3）1.1.1.1（1027）->103.1.1.69（4002）
4）1.1.1.1（1028）->103.1.1.69（4003）
Taking rule, 1 as example, NIC-0 carries out RPS module while receiving the data flow that client sends out, extracts numberAccording to the quaternary group information of data message in stream, and carry out Hash(202.107.111.17 after arranging by size,1.1.1.1,8080,1025), result of calculation should be transferred to CPU1 for this data message and process. AndNIC-1 also carries out RPS after receiving the data flow that service end replys, due to the record of NAPT, after extractionFour-tuple sequence after, the result that Hash (202.107.111.17,103.1.1.69,8080,4000) obtains isThis data message should be given CPU3 and process. Obviously the knot that, NIC-0 and NIC-1 obtain after calculatingFruit is not identical. Therefore, record in the situation of NAPT/NAT, RPS module also cannot ensure same numberDistributing to same CPU according to the data message of stream processes.
Because RPS module under NAPT/NAT scene cannot ensure the data message of same data flow to hand overProcess to same CPU, can bring two problems:
1, data flow related resource needs locking protection, the complexity of having brought software to realize. Simultaneously due toLock mutual exclusion, can not complete parallel between multinuclear, causes performance loss.
2, data message is frequently processed in different CPU, causes CPUcache shake, further shadowRing performance.
Summary of the invention
In view of the above problems, the object of this invention is to provide a kind of retransmission method, dress of network data messagePut and system, having or not under NAPT/NAT scene to realize, RPS module ensures same data flowMiddle data message can be distributed to same CPU and process.
The retransmission method that the invention provides a kind of network data message, comprising:
Obtain the data message in data flow;
Carry out NAT strategy matching according to the first data message in data flow, it is right that foundation comprises data flow instituteAnswer the NAT transformational relation table of CPU;
According to the five-tuple information before and after other data message conversion except first data message in data flowWith NAT transformational relation table, determine CPU corresponding to other data message except first data message.
The present invention also provides a kind of retransmission unit of network data message, comprising:
Data message acquiring unit, for obtaining the data message of data flow;
NAT transformational relation table construction unit, carries out NAT for the first data message according to data flowStrategy matching, set up comprise data flow the NAT transformational relation table of corresponding CPU;
Retransmission unit, before other data message conversion except first data message according to data flowAfter five-tuple information and NAT transformational relation table, determine other data message except first data messageCorresponding CPU.
The present invention provides again a kind of repeater system of network data message, comprises network interface card, CPU and above-mentioned netNetwork retransmission unit, wherein, network interface card is for receiving the data flow of client and service end; CPU for the treatment ofData message in data flow; Forwarded device is for distributing to the data message of same data flowSame CPU processes.
Utilize above-mentionedly according to the retransmission method of network data message of the present invention, Apparatus and system, having or notUnder NAPT/NAT scene, ensure data message in same data flow to be assigned to identical CPU placeReason, reduces use and the CPUcache shake of lock, promotes the performance of forwarded.
In order to realize above-mentioned and relevant object, one or more aspects of the present invention comprise below will be in detailThe feature that illustrates and refer in particular in the claims. Explanation and accompanying drawing below describe the present invention in detailSome illustrative aspects. But what indicated these aspects is only can use principle of the present invention eachSome modes in the mode of kind. In addition, the present invention is intended to comprise being equal to of all these aspects and theyThing.
Brief description of the drawings
By reference to the content below in conjunction with the description of the drawings and claims, and along with to the present inventionUnderstanding more comprehensively, other object of the present invention and result will more be understood and should be readily appreciated that. In the accompanying drawings:
Fig. 1 is the network topology structure figure of RPS module application under NAPT scene;
Fig. 2 is according to the flow chart of the retransmission method of network data message of the present invention;
Fig. 3 is the flow chart that enters RPS module according to the data message of the embodiment of the present invention;
Fig. 4 enters forwarding process schematic diagram according to the data message of the embodiment of the present invention;
Fig. 5 is according to the structure chart of the nat translation table of the embodiment of the present invention;
Fig. 6 is according to the block diagram of the retransmission unit of network data message of the present invention.
In institute's drawings attached, identical label is indicated similar or corresponding feature or function.
Detailed description of the invention
Below with reference to accompanying drawing, specific embodiments of the invention are described in detail.
In order to solve, in prior art, under NAPT/NAT scene, RPS module can not be by same data flowData message distribute to the problem that same CPU processes, the present invention is by building keyword and foundationNAT transformational relation table, by inquiry NAT transformational relation table, distributes the data message of same data flowProcess to same CPU, thereby ensure data message in same data flow to be assigned to identical CPUProcess, reduce use and the CPUcache shake of lock.
Fig. 2 shows according to the flow process of the retransmission method of network data message of the present invention.
As shown in Figure 2, when RPS module receives after data flow, according to the data in received data streamThe five-tuple information (step S210) of data message described in Receive message; Then, according in described data flowFirst data message carry out NAT strategy matching, set up NAT transformational relation table (step S220); ?After setting up NAT transformational relation table, in step S230, just can be according to removing first number in data flowAccording to five-tuple information and NAT transformational relation table before and after other data message conversion outside message, determine and removeCPU corresponding to other data message outside first data message.
After having determined the CPU of corresponding forwarding, just can forward except first as forwarding target taking this CPUOther data message outside data message. Because this CPU is the NAT setting up according to first data messageTransformational relation table is determined, therefore, just can pass through the inquiry of this NAT transformational relation table same numberGive same CPU according to the data message of stream and process, thereby avoid data message frequency in different CPUThe CPUcache shake that numerous processing causes.
Forwarded method provided by the invention, is divided into two flow processs, and data message is introduced into RPS moduleHandling process and data message from RPS module finishes, enter the forwarding process of data message.
Fig. 3 shows the flow process that enters RPS module according to the data message of the embodiment of the present invention.
As shown in Figure 3, the data that the data flow of the network interface card of client being received and the network interface card of service end are receivedStream is delivered to RPS module entrance, and RPS module receives the data flow that network interface card is sent here, and determines whether IP numberAccording to message, if not IP datagram literary composition, RPS module records current C PU information return to CPU;If IP datagram literary composition, obtains source IP address, object IP address and the protocol number of data message, and examinesWhether the protocol number that survey data message obtains is Transmission Control Protocol or udp protocol, if so, obtains datagramSource port and the destination interface of literary composition, by building Key inquiry NAT transformational relation table; If not, by sourcePort and destination interface make zero, and by building Key inquiry NAT transformational relation table, (Key and NAT turnChanging relation table is described in detail later), if the Key building hits NAT transformational relation table, datagramThe CPU that literary composition is corresponding is Key and hits the CPU in NAT transformational relation table, extracts data message correspondenceCPU information return to network interface card, if build the miss NAT transformational relation of Key table, basisCPU corresponding to five-tuple acquisition of information before data message conversion.
Wherein, five-tuple information comprises source IP address, object IP address, source port, destination interface and associationView number, obtaining five-tuple information is the hash value in order to calculate five-tuple information.
Wherein, judge that TCP or udp protocol are in order to obtain transport layer port, because other transport layer associationView does not have a port, is set to 0 so give tacit consent to port if not TCP or udp protocol.
Process and build again NAT transformational relation table and turn because data message is introduced into RPS moduleSend out, so first data message can hit NAT transformational relation table scarcely, inquiry is less than first datagramThe CPU that literary composition is corresponding, can determine corresponding CPU according to the five-tuple information before first data message conversion,Detailed process is:
(1) obtain the five-tuple information before first data message conversion, comprise source IP address, object IPAddress, source port, destination interface, protocol number, wherein for the message source of non-UDP, non-Transmission Control ProtocolPort and destination interface are set to 0;
(2) be keyword by five-tuple information architecture, as the input of Hash function, obtain hash value;Wherein, the realization of Hash function has various ways, by keyword being mapped to a position in Hash tablePut Visitor Logs, accelerate seek rate, common are direct addressing, digital analysis method, jackknife method,Random number method, leaving remainder method etc.; The Hash of this place has used jackknife method, according to the input of five-tuple, obtainsGet the hash value of 32;
(3) obtain the work CPU quantity of current device, by hash value to cpu quantity delivery,To the CPU at first data message place.
Data message, from RPS module finishes, enters the forwarding process of data message, meeting in this flow processFor the first data message in same data flow, build NAT transformational relation table, for same data flowSearching of middle follow-up data message, all can be according to the first datagram in data flow for different data flowLiterary composition builds NAT transformational relation table, and in data flow, other data message except first data message all canThe CPU identical with first data message with what determine its correspondence according to this NAT transformational relation table.
Fig. 4 shows the flow process that enters forwarding according to the data message of the embodiment of the present invention.
As shown in Figure 4, first detection enters whether the data flow of forwarding process is IP datagram literary composition, ifNot IP datagram literary composition, continue to detect the data flow that enters forwarding process, if IP datagram literary composition,Detect data message whether headed by a data message, if not first data message, continue to detectEnter the data message of forwarding process, if first data message records first data message with LkeyFive-tuple information before NAT conversion; Then first data message starts to carry out NAT conversion, with RkeyRecord the five-tuple information after NAT conversion; Obtain first data message according to the hash value that calculates RPSThe corresponding CPU forwarding, records the corresponding CPU information forwarding of first data message, by first data messageFive-tuple letter after the hash value of the five-tuple information before NAT conversion, first data message NAT conversionThe hash value of breath becomes NAT single linked list with the corresponding CPU information architecture forwarding of first data message; With headHash value and the described first data message NAT of the five-tuple information before individual data message NAT conversion turnThe hash value of the five-tuple information after changing builds a Hash array; By Hash array and single linked list combination,Set up described NAT transformational relation table.
Wherein, the key building in same data flow, first for calculating the Hash of NAT transformational relation tableValue, in the time not hitting NAT transformational relation table, then is used as the hash value that calculates RPS, should be noted that, these two hash algorithm differences.
It should be noted that, the follow-up data message in same data flow enters the mistake of RPS resume moduleCheng Zhong, will be designated as the hash value of Lkey or the hash value of Rkey under the Key of structure, hash value is used forAddressing, can be at NAT transformational relation table by building the hash value of Lkey or the hash value of RkeyIn get same CPU, be the CPU calculating according to the first data message in same data flow.
That is to say, in the time that the first data message in same data flow enters RPS module, obtain firstSource IP address, object IP address and the protocol number of data message, and detect the association that first data message obtainsWhether view number is Transmission Control Protocol or udp protocol, if so, obtains source port and the destination of data messageMouthful, by building Key inquiry NAT transformational relation table; If not, source port and destination interface are made zero,By building Key inquiry NAT transformational relation table, because first data message is not also tied from RPS moduleShu Wufa builds NAT transformational relation table, thus first data message inquire about less than NAT transformational relation table,Calculate the hash value of RPS by the five-tuple information before the conversion of first data message, obtain correspondingCPU information.
And follow-up data message in same data flow need not build NAT transformational relation table again, directly inquiryThe NAT transformational relation table building according to first data message.
The NAT that before can hitting scarcely for the first data message of different data streams, data flow builds turnsChange relation table, need to rebuild NAT transformational relation table according to the first data message in data flow.
In order to describe the structure of NAT transformational relation table in detail, Fig. 5 shows according to the embodiment of the present inventionThe structure of nat translation table.
As shown in Figure 5, NAT transformational relation table comprises:
Hash array and single linked list, the Hash that the list item of single linked list comprises the hash value of Lkey, RkeyValue, the CPU information (Cpu_info) at first data message place and out of Memory (Other_info) wherein,Five-tuple information (Lkey_info) before Lkey record data message NAT, Rkey record data messageFive-tuple information (Rkey_info) after NAT; Hash array index is hash value and the Rkey of LkeyHash value.
Addr1, addr2 in Fig. 5, addr3, addr10 have represented different data flow, dataA node item of the correspondence that fails to be convened for lack of a quorum, this node item records Cpu+Lkey+Rkey information, but due to Hash basisBody may have conflict, so multiple nodes of may connecting below each array item.
Because the five-tuple information before and after the conversion for calculating hash value is not identical, therefore, calculateHash value difference, for example, the hash value calculating according to the first five tuple information of conversion is 1024, according toThe hash value that after conversion, five-tuple information calculates is 10027, has so just hit arrayHash_table[1024] and Hash_table[10027] two list items, each list item of Hash array has been connectedSingle linked list, the Cpu+Lkey+Rkey information that each chained list node records before being exactly, as NAT_entryShown in, inquire thus CPU information.
Describe according to the retransmission method of network data message of the present invention above with reference to embodiment and accompanying drawing.Forwarded method of the present invention, can adopt software to realize, and also can adopt hardware to realize, or adoptThe mode of software and hardware combination realizes.
Corresponding with said method, the present invention also provides a kind of retransmission unit of network data message. Fig. 6Show according to the retransmission unit of network data message of the present invention, as shown in Figure 6, provided by the inventionThe retransmission unit 600 of network data message, comprising: data message acquiring unit 610, NAT transformational relationTable construction unit 620, retransmission unit 630.
Wherein, data message acquiring unit 610, for obtaining the data message of data flow; NAT turnsChange relation table construction unit 620, for carry out NAT strategy according to the first data message of data flowJoin, set up comprise data flow the NAT transformational relation table of corresponding CPU; Retransmission unit 630, for rootAccording to five-tuple information and NAT before and after other data message conversion except first data message in data flowTransformational relation table, determines CPU corresponding to other data message except first data message.
Wherein, data message acquiring unit 610 further comprises first data message judging unit 611(figureNot shown), for by the described NAT transformational relation table of inquiry, judge the datagram in described data flowWhether literary composition is described first data message.
Wherein, NAT transformational relation table construction unit 620 further comprises the first five tuple information record of conversion621(figure in unit is not shown), for recording the five-tuple information before described first data message NAT conversion;After conversion, five-tuple information recording unit 622(figure is not shown), for recording described first data message NATFive-tuple information after conversion; CPU acquiring unit 623(figure is not shown), according to first data messageFive-tuple information architecture keyword before NAT conversion, as the input of Hash function, obtains hash value,CPU quantity delivery by hash value to work, obtains the CPU that first data message is corresponding; CPUInformation recording unit 624(figure is not shown), for recording the CPU information that described first data message is corresponding;Single linked list construction unit 625(figure is not shown), by the five-tuple before described first data message NAT conversionHash value and the head of the five-tuple information after hash value, the described first data message NAT conversion of informationThe corresponding CPU information architecture forwarding of individual data message becomes single linked list; Hash array determining unit 626(figureNot shown), for hash value and the institute of the five-tuple information with before described first data message NAT conversionState the hash value of the five-tuple information after first data message NAT conversion and determine a Hash array; NATIt is not shown that transformational relation table is set up unit 627(figure), for according to described Hash array and described single linked list,Set up described NAT transformational relation table.
In addition, the present invention provides again a kind of repeater system of network data message, comprise network interface card, CPU andThe retransmission unit of aforementioned network data message, wherein, network interface card is for receiving the data of client and service endStream; CPU is for the treatment of the data message in data flow; The retransmission unit of network data message is for will be withArticle one, the data message of data flow is distributed to same CPU processing.
In the repeater system of above-mentioned network data message, the quantity of network interface card is at least two, and CPU at leastFor double-core CPU.
Describe according to the forwarding side of network data message of the present invention in the mode of example above with reference to accompanying drawingMethod, Apparatus and system. But, it will be appreciated by those skilled in the art that and carry for the invention described aboveThe retransmission method of network data message, Apparatus and system, can also be on the basis that does not depart from content of the present inventionOn do various improvement. Therefore, protection scope of the present invention should be true by the content of appending claimsFixed.
Claims (8)
1. a retransmission method for network data message, comprising:
Obtain the data message in data flow;
Carry out NAT strategy matching according to the first data message in described data flow, set up and comprise described numberAccording to stream the NAT transformational relation table of corresponding CPU;
According to the five-tuple before and after other data message conversion except first data message in described data flowInformation and described NAT transformational relation table, determine described other data message pair except first data messageThe CPU answering; Wherein, in the described process of setting up NAT transformational relation table,
Obtain the five-tuple information before described first data message NAT conversion;
Obtain the five-tuple information after described first data message NAT conversion;
Five-tuple information architecture keyword before changing according to described first data message NAT is as Hash letterThe input of number, obtains hash value, and the CPU quantity delivery by hash value to work, obtains described headThe CPU that individual data message is corresponding;
By hash value, the described first data of the five-tuple information before described first data message NAT conversionHash value and the CPU information corresponding to described first data message of the five-tuple information after message NAT conversionBe built into single linked list;
With hash value and the described first data of the five-tuple information before described first data message NAT conversionThe hash value of the five-tuple information after message NAT conversion is determined a Hash array;
According to described Hash array and described single linked list, set up described NAT transformational relation table.
2. the retransmission method of network data message as claimed in claim 1, wherein,
By inquiring about described NAT transformational relation table, judge whether the data message in described data flow is instituteState first data message.
3. the retransmission method of network data message as claimed in claim 1, wherein, according to described numberAccording to five-tuple information and the described NAT transformational relation of other data message except first data message in streamTable, determines in the process of the described corresponding described CPU of other data message except first data message,
By building hash value or the described data of the five-tuple information before described data message NAT conversionThe hash value of the five-tuple information after message NAT conversion is inquired about described NAT transformational relation table, determines instituteState the CPU that data message is corresponding.
4. the retransmission method of the network data message as described in any one in claim 1～3, wherein,
Described five-tuple information comprises source IP address, object IP address, source port, destination interface and agreementNumber;
If the protocol number that described data message obtains is Transmission Control Protocol or udp protocol, obtain source portAnd destination interface;
If the protocol number that described data message obtains is not Transmission Control Protocol or udp protocol, by source portMake zero with destination interface, the Hash of the five-tuple information of data message before NAT conversion described in direct constructionThe hash value of value or the described data message five-tuple information after NAT conversion.
5. a retransmission unit for network data message, comprising:
Data message acquiring unit, for obtaining the data message of data flow;
NAT transformational relation table construction unit, carries out for the first data message according to described data flowNAT strategy matching, set up comprise described data flow the NAT transformational relation table of corresponding CPU; DescribedNAT transformational relation table construction unit further comprises: change the first five tuple information record cell, for recordFive-tuple information before described first data message NAT conversion; Five-tuple information recording unit after conversion,For recording the five-tuple information after described first data message NAT conversion; CPU acquiring unit, according to instituteState the input as Hash function of five-tuple information architecture keyword before first data message NAT conversion,Obtain hash value, the CPU quantity delivery by hash value to work, obtains described first data messageCorresponding CPU; CPU information recording unit, for recording the CPU information that described first data message is corresponding;Single linked list construction unit, by the hash value of the five-tuple information before described first data message NAT conversion,Hash value and the described first data message pair of the five-tuple information after described first data message NAT conversionThe CPU information architecture that should forward becomes single linked list; Hash array determining unit, for described first dataAfter the hash value of the five-tuple information before message NAT conversion and described first data message NAT conversion fiveThe hash value of tuple information is determined a Hash array; NAT transformational relation table is set up unit, for according to instituteState Hash array and described single linked list, set up described NAT transformational relation table;
Retransmission unit, for according to described data flow, other data message except first data message turnsFive-tuple information and described NAT transformational relation table before and after changing, described in determining except first data messageThe CPU that other data message is corresponding.
6. the retransmission unit of network data message as claimed in claim 5, wherein, described data messageAcquiring unit further comprises:
First data message judging unit, for by the described NAT transformational relation table of inquiry, described in judgementWhether the data message in data flow is described first data message.
7. a repeater system for network data message, comprises network interface card, CPU and as claim 5 or 6Described in the retransmission unit of network data message, wherein,
Described network interface card is for receiving the data flow of client and service end;
Described CPU is for the treatment of the data message in data flow;
The retransmission unit of described network data message is same for the data message of same data flow is distributed toA CPU processes.
8. the repeater system of network data message as claimed in claim 7, wherein,
The quantity of described network interface card is at least two;
Described CPU is at least double-core CPU.
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| CN104468412B (en) * | 2014-12-04 | 2017-10-31 | 东软集团股份有限公司 | BlueDrama packet delivery method and system based on RSS |
| CN104580017B (en) * | 2014-12-30 | 2018-04-06 | 东软集团股份有限公司 | BlueDrama distribution method and system based on RSS |
| CN105871741B (en) * | 2015-01-23 | 2018-12-25 | 阿里巴巴集团控股有限公司 | A kind of message diversion method and device |
| CN106878179B (en) * | 2016-12-14 | 2020-10-09 | 新华三技术有限公司 | Message forwarding method and device |
| CN110022330B (en) * | 2018-01-09 | 2022-01-21 | 阿里巴巴集团控股有限公司 | Processing method and device for network data packet and electronic equipment |
| CN109067935A (en) * | 2018-08-16 | 2018-12-21 | 深圳市风云实业有限公司 | Packet message processing method and multi-core processor system |
| CN113132262B (en) * | 2020-01-15 | 2024-05-03 | 阿里巴巴集团控股有限公司 | Data stream processing and classifying method, device and system |
| CN113783973B (en) * | 2021-08-31 | 2023-09-15 | 上海弘积信息科技有限公司 | Implementation method for NAT port allocation lock-free data flow under multi-core |
| CN114268518B (en) * | 2021-12-21 | 2023-04-07 | 深圳市吉祥腾达科技有限公司 | Method and system for realizing forwarding acceleration of sdwan data tunnel |
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