CN105429882A - Message editing realization method and apparatus based on conventional switching chip search mode - Google Patents
Message editing realization method and apparatus based on conventional switching chip search mode Download PDFInfo
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- CN105429882A CN105429882A CN201510688610.XA CN201510688610A CN105429882A CN 105429882 A CN105429882 A CN 105429882A CN 201510688610 A CN201510688610 A CN 201510688610A CN 105429882 A CN105429882 A CN 105429882A
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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
- H04L45/74—Address processing for routing
- H04L45/741—Routing in networks with a plurality of addressing schemes, e.g. with both IPv4 and IPv6
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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
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
-
- 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
- H04L45/58—Association of routers
- H04L45/586—Association of routers of virtual routers
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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
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/354—Switches specially adapted for specific applications for supporting virtual local area networks [VLAN]
Abstract
The invention discloses a message editing realization method based on a conventional switching chip search mode. The method includes: a message enters a conventional switching chip for message search, and an output port and forwarding behavior of the message are obtained; and according to the output port and the forwarding behavior, four-layer information editing, three-layer information editing, and two-layer header editing of the message are performed from the inner part of the message to the outer part of the message in a production line manner. According to the method, flow search of openflow is simulated with the process of the conventional chip search, the cost of replacement between an OpenFlow chip and the conventional chip is greatly reduced, more flexible message editing can be supported, and more flexible and various requirements of users are satisfied.
Description
Technical field
The present invention relates to a kind of message editing technology, especially relate to a kind of message editing implementation method of searching mode based on traditional exchange chip.
Background technology
In the technical scheme that a published application number is the implementation method describing a kind of Openflow multistage flow table based on common exchange chip in the patent documentation of CN201510141725.7, it is by network equipment maintenance one or several multilevel flow table, and data flow only forwards according to these stream tables, described stream table is by some keywords and the elastic regulation formed that performs an action, and each key field can wildcard, the generation of stream table itself, safeguard, issue and managed by external controller completely.In actual applications, network management personnel can decide the flow forwarding rule using which kind of granularity by coupling keyword concrete in configuration flow list item.Existing this scheme can the multi-vendor environment of centralized control, reduces complexity, higher innovation, improve reliability and the fail safe of network, more fine-grained network control by automation, and better Consumer's Experience.
But the control that the scheme disclosed in above-mentioned patent is intended to flow face, top layer issues, and the flow stream searching behavior that the exchange chip that the actual behavior realized neither be traditional can realize, more do not relate to the description of message editing part.
Define in the network of OpenFlow in the mode of flow stream searching to overturn traditional network architecture.On the one hand in the mode of searching of multilevel flow table to realize the deployment of legacy network; Also by the mode of searching of multilevel flow table, the mode of searching of network is become more flexible on the other hand, meet various user's different levels, the deployment of different aspect.
In the process of actual development, realize the scheme of multilevel flow table with chip, need the framework of framework legacy network chip again on the one hand, improve the cost of research and development; The mode of the reality of multilevel flow table, also can improve the time delay of message repeating on the other hand.So each research and development manufacturer is more prone to search mode in traditional network to simulate the search procedure of multilevel flow table, and based on this, encapsulate upper layer software (applications) development interface in the mode of OpenFlow multilevel flow table.
But, the mode that traditional exchange chip of current employing is searched realizes the mode scheme of OpenFlow multilevel flow table, in editor's aspect of message, it is also often the traditional edit mode adopted, message editing can only be carried out according to traditional fixed field, the TTL (life span) of such as message, DSCP (differentiated services code points) etc.Therefore, need research to search on the basis of mode in tradition, how can realize the flexible editor of message simultaneously at hardware view, thus realize the different demands of user with higher message repeating efficiency.
Summary of the invention
The object of the invention is to the defect overcoming prior art, a kind of message editing implementation method of searching mode based on traditional exchange chip is provided, on mode of the searching basis of traditional exchange chip, to realize the flexible editor of the message at hardware view.
For achieving the above object, the present invention proposes following technical scheme: a kind of message editing implementation method of searching mode based on traditional exchange chip, comprising:
Message enters in exchange chip and carries out message and search, and obtains output port and the forwarding behavior of message;
According to described output port and the behavior of forwarding, carry out four layers of information editing of message, three layers of information editing and two layers of head editor from the inside of message successively to the outside of message in pipelined fashion.
Preferably, message enters in exchange chip the VLAN (VLAN) carried out into direction and searches, described VLAN searches the VLANID (VLAN mark) for judging whether to match message, if match, then proceed subsequent packet to search, otherwise, directly by packet loss.
Preferably, message enters the VLAN carried out into direction in exchange chip and searches, and described VLAN searches the VLAN mark for judging whether to match message, if match, then proceeds subsequent packet and searches, otherwise, directly by packet loss.
Preferably, the follow-up MAC Address comprising message successively of searching of message is searched and two layers of information searching/tri-layer information searching.
Described MAC Address is searched: judge that message carries out two layers of information searching or three layers of information searching according to the target MAC (Media Access Control) address of message;
Described two layers of information searching: the target MAC (Media Access Control) address according to message carries out searching of MAC Address, and the output port and the forwarding behavior that obtain described message;
Described three layers of information searching: searching of IP address is carried out in the object IP address according to message, and the output port and the forwarding behavior that obtain described message.
Preferably, during described MAC Address is searched, when the target MAC (Media Access Control) address of message is route MAC Address time, then carry out three layers of information searching of message, otherwise carry out two layers of information searching of message.
Preferably, before the VLAN carrying out direction at message searches, carry out searching for self-defined flow: carry out searching of stream table according to field specific in message, obtain output port and the forwarding behavior of message.Here specific fields can select one or several field flexibly according to the demand of user, such as target MAC (Media Access Control) address+vlan information, vlan information, IP destination address etc.
Preferably, described four layers of information editing comprise ICMP (InternetControlMessageProtocol, Internet Control Message Protocol) message editing, GRE (GenericRoutingEncapsulation, generic route encapsulation) message editing, UDP (UserDatagramProtocol, i.e. User Datagram Protoco (UDP)) message editing and TCP (TransmissionControlProtocol, transmission control protocol) message editing, described icmp packet editor comprises code field and the type field editor of icmp packet; Described GRE message editing comprises the key field editor of GRE message; Described UDP message editing and TCP message editor include the automatic renewal of the destination interface of message, the editor of source port and corresponding check digit.
Preferably, described three layers of information editing comprise IPv4 (InternetProtocolVersion4, Internet Protocol the 4th edition), IPv6 (InternetProtocolVersion6, Internet Protocol sixth version) and ARP (AddressResolutionProtocol, address resolution protocol) editor of message, the editor of described IPv4 message comprises the protocol fields of IPv4 message, TTL (TimeToLive, life span), ECN (ExplicitCongestionNotification, ecn (explicit congestion notification) agreement), DSCP (DifferentiatedServicesCodePoint, differentiated services code points), the editor of object IP address and source IP address, the editor of described IPv6 message comprises the editor of the stream label of IPv6 message, protocol fields, TTL, ECN, DSCP, object IP address and source IP address, the editor of described ARP message comprises the destination protocol address of ARP message, destination hardware address, transmitting terminal protocol address, transmitting terminal hardware address, protocol type and type of hardware.
Preferably, described two layers of head editor comprise the editor of the target MAC (Media Access Control) address of message, source MAC, inner VLAN and outside VLAN.
Preferably, the edit action of described message field (MFLD) comprises: the rewriting of field, the exchange of field, the interpolation of field and the deletion of field.
Compared with prior art, the invention has the beneficial effects as follows: the present invention to search message, meets the definition that OpenFlow flow tabular form is searched in the mode of searching of traditional exchange chip on the one hand; Secondly, in the SDK development process of upper strata, the development interface of stream sheet form can be defined with legacy interface definition mode, greatly reduce the cost of regenerating between OpenFlow chip and traditional die.Message editing more flexibly can be supported simultaneously, meet the demand that user is more flexible and changeable.
Accompanying drawing explanation
Fig. 1 is the principle schematic that the present invention realizes the common exchange chip of message editing;
Fig. 2 the present invention is based on the message editing implementation method that traditional exchange chip searches mode, schematic flow sheet.
Embodiment
Below in conjunction with accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme of the embodiment of the present invention.
Shown in composition graphs 1 and Fig. 2, describe disclosed a kind of principle of searching the message editing implementation method of mode based on traditional exchange chip in detail:
In message search procedure on traditional common exchange chip, when message is from after the port transmission of exchange chip is come in, first need the forwarding carrying out traditional message search procedure, after searching, obtain output port and corresponding edit action, specifically describe as follows:
When data message is sent in chip interface, first can carry out searching of User Defined flow, this is searched and can carry out searching of stream table according to field specific in message, thus obtains corresponding output port and edit action.This searches specific implementation user defines message forwarding behavior according to specific business demand.If client does not have unconventional service deployment, this is searched and can skip.It should be noted that, specific fields here can select one or several field flexibly according to the demand of user, such as target MAC (Media Access Control) address+vlan information, vlan information, IP destination address etc.
Secondly, message can carry out searching into direction VLAN: originally searching is the filtration entering direction in order to realize message at VLAN, only have message to match port allows the VLAN mark passed through, just can carry out follow-up searching flow process: MAC Address is searched, two layers of information searching and three layers of information searching; Otherwise this message can be dropped.
MAC Address is searched: this is searched and mainly judges that this message carries out searching of searching of three layers of information or two layers of information according to the target MAC (Media Access Control) address of message.When the target MAC (Media Access Control) address of message is wireless router MAC Address (RouterMAC) time, then search according to three layers of information of message, otherwise according to two layers of information searching of message.
Two layers of information searching: this is searched and mainly carries out searching of MAC Address according to the target MAC (Media Access Control) address of message, and the output port and the forwarding behavior that obtain this message.
Three layers of information searching: this is searched and mainly carries out searching of IP address according to the object IP address of message, and obtain output port and the forwarding behavior of this message.
Search above according to each aspect the output port and forwarding behavior that obtain message reality, output port is mainly used in instruction message and will sends out from this port, and the behavior that forwards then determines this message to be needed through for what kind of editor.The present invention is in the editing process of message, and from the inside of message, carry out the editing process (message layering, then with reference to ISO message seven layer model, does not do concrete describing here) of message in pipelined fashion to the outside of message, detailed process is as follows:
First be the editor carrying out message for four layers of information of message: this part editor is mainly divided into icmp packet, GRE message, UDP message and TCP message four class message but is not limited to this four classes message.Editor for four layers of information mainly comprises but is not only confined to following information: the automatic renewal of the destination interface of the key field of the message of the code field of icmp packet and type field, GRE, UDP and TCP message, source port and corresponding check digit.
Next is the editor carrying out message for three layers of information of message: the editor of this part is mainly divided into IPv4, IPv6 and ARP tri-class message but be not limited to this three classes message.For the editor of three layers of information mainly including, but not limited to the protocol fields of following information: IPv4, TTL, ECN, DSCP, object IP address and source IP address; The stream label of IPv6 message, protocol fields, TTL, ECN, DSCP, object IP address and source IP address; The destination protocol address of ARP message, destination hardware address, transmitting terminal protocol address, transmitting terminal hardware address, protocol type and type of hardware etc.
Be finally the outermost two layers of head editor of message, this part editor relates generally to the editor of the target MAC (Media Access Control) address of message, source MAC, inner VLAN head, outside VLAN head.
The edit action of all fields (field namely related in four layers of information editing, four layers of information editing and two layers of head editor) mainly comprises the following aspects above:
The rewriting of field: namely brand-new value replaces the original value in original message, the editor of the fields such as such as TTL.
The exchange of field: namely exchange corresponding value between two associated fields in original message.Such as object IP address and source IP address exchange.
The interpolation of field: namely insert corresponding message field (MFLD) in original message, such as, add VLAN field.
The deletion of field: namely delete certain field in original message, such as, delete VLAN field.
Mode of searching traditional for data message combines with message editing flexibly by the present invention, reduce the cost of being regenerated to OpenFlow chip by traditional chip on the one hand, and still can realize in the mode of hardware the flexible and changeable message editing mode that defines in OpenFlow; Achieving mainstream vendor realizes the standardized flow process of OpenFlow on the other hand, can meet the edit mode flexibly of OpenFlow standard definition simultaneously.
Technology contents of the present invention and technical characteristic have disclosed as above; but those of ordinary skill in the art still may do all replacement and the modification that do not deviate from spirit of the present invention based on teaching of the present invention and announcement; therefore; scope should be not limited to the content that embodiment discloses; and various do not deviate from replacement of the present invention and modification should be comprised, and contained by present patent application claim.
Claims (10)
1. search a message editing implementation method for mode based on traditional exchange chip, it is characterized in that: comprising:
Message enters in exchange chip and carries out message and search, and obtains output port and the forwarding behavior of message;
According to described output port and the behavior of forwarding, carry out four layers of information editing of message, three layers of information editing and two layers of head editor from the inside of message successively to the outside of message in pipelined fashion.
2. message editing implementation method according to claim 1, it is characterized in that, message enters the VLAN carried out into direction in exchange chip and searches, described VLAN searches the VLAN mark for judging whether to match message, if match, then proceed subsequent packet to search, otherwise, directly by packet loss.
3. message editing implementation method according to claim 2, is characterized in that, the follow-up MAC Address comprising message successively of searching of message is searched and two layers of information searching/tri-layer information searching,
Described MAC Address is searched: judge that message carries out two layers of information searching or three layers of information searching according to the target MAC (Media Access Control) address of message;
Described two layers of information searching: the target MAC (Media Access Control) address according to message carries out searching of MAC Address, and the output port and the forwarding behavior that obtain described message;
Described three layers of information searching: searching of IP address is carried out in the object IP address according to message, and the output port and the forwarding behavior that obtain described message.
4. message editing implementation method according to claim 3, is characterized in that, during described MAC Address is searched, when the target MAC (Media Access Control) address of message is route MAC Address time, then carries out three layers of information searching of message, otherwise carries out two layers of information searching of message.
5. message editing implementation method according to claim 2, it is characterized in that, before the VLAN carrying out direction at message searches, carry out User Defined flow to search, described User Defined flow is searched and is carried out searching of stream table according to field specific in message, obtains output port and the forwarding behavior of message.
6. message editing implementation method according to claim 5, is characterized in that, described specific fields comprises target MAC (Media Access Control) address+vlan information, vlan information, IP destination address.
7. message editing implementation method according to claim 1, it is characterized in that, described four layers of information editing comprise icmp packet editor, GRE message editing, UDP message editing and TCP message editor, and described icmp packet editor comprises code field and the type field editor of icmp packet; Described GRE message editing comprises the key field editor of GRE message; Described UDP message editing and TCP message editor include the automatic renewal of the destination interface of message, the editor of source port and corresponding check digit.
8. message editing implementation method according to claim 1, it is characterized in that, described three layers of information editing comprise the editor of IPv4, IPv6 and ARP message, and the editor of described IPv4 message comprises the editor of the protocol fields of IPv4 message, TTL, ECN, DSCP, object IP address and source IP address; The editor of described IPv6 message comprises the editor of the stream label of IPv6 message, protocol fields, TTL, ECN, DSCP, object IP address and source IP address; The editor of described ARP message comprises the destination protocol address of ARP message, destination hardware address, transmitting terminal protocol address, transmitting terminal hardware address, protocol type and type of hardware.
9. message editing implementation method according to claim 1, is characterized in that, described two layers of head editor comprise the editor of the target MAC (Media Access Control) address of message, source MAC, inner VLAN and outside VLAN.
10. the message editing implementation method according to claim 6 ~ 9 any one, is characterized in that, the edit action of described message field (MFLD) comprises: the rewriting of field, the exchange of field, the interpolation of field and the deletion of field.
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| CN109194665A (en) * | 2018-09-17 | 2019-01-11 | 盛科网络（苏州）有限公司 | A kind of generation method that message finds key value and device |
| CN109995680A (en) * | 2019-04-11 | 2019-07-09 | 盛科网络（苏州）有限公司 | A kind of message process device and method |
| CN110011920A (en) * | 2019-04-11 | 2019-07-12 | 盛科网络（苏州）有限公司 | A kind of message processing method and device |
| CN110086787A (en) * | 2019-04-15 | 2019-08-02 | 杭州迪普信息技术有限公司 | Packet identification method, device, electronic equipment and machine readable storage medium |
| CN116346746A (en) * | 2023-05-12 | 2023-06-27 | 之江实验室 | Message processing method for multistage programmable editing |
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Cited By (12)
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| CN106656783A (en) * | 2016-09-28 | 2017-05-10 | 盛科网络（苏州）有限公司 | Ethernet packet replacement editing method and system |
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| CN109995680A (en) * | 2019-04-11 | 2019-07-09 | 盛科网络（苏州）有限公司 | A kind of message process device and method |
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| CN110086787A (en) * | 2019-04-15 | 2019-08-02 | 杭州迪普信息技术有限公司 | Packet identification method, device, electronic equipment and machine readable storage medium |
| CN110086787B (en) * | 2019-04-15 | 2021-11-02 | 杭州迪普信息技术有限公司 | Message identification method and device, electronic equipment and machine-readable storage medium |
| CN116346746A (en) * | 2023-05-12 | 2023-06-27 | 之江实验室 | Message processing method for multistage programmable editing |
| CN116346746B (en) * | 2023-05-12 | 2023-08-15 | 之江实验室 | Message processing method for multistage programmable editing |
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