CN104253876A - Mapping table of stateful IPv6 and IPv4 communication and management method - Google Patents
Mapping table of stateful IPv6 and IPv4 communication and management method Download PDFInfo
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- CN104253876A CN104253876A CN201310269298.1A CN201310269298A CN104253876A CN 104253876 A CN104253876 A CN 104253876A CN 201310269298 A CN201310269298 A CN 201310269298A CN 104253876 A CN104253876 A CN 104253876A
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Abstract
The invention relates to the technical field of IPv6 network communication, in particular to a mapping table of stateful IPv6 and IPv4 communication and a mapping table management method. According to the mapping table of stateful IPv6 and IPv4 communication, IPv6 destination addresses, IPv6 message destination terminal numbers, IPv4 source addresses and IPv4 message source numbers are reduced in the data portion, IPv6 addresses, IPv6 message source numbers, IPv4 source addresses and IPv4 message source numbers are reduced in the result portion, all information are integrated in one mapping table, so that the hardware storage space is saved greatly, and maintenance cost is reduced.
Description
Technical field
The present invention relates to IPv6 network communication technology field, particularly a kind of have IPv6 and the IPv4 of state to communicate mapping item and mapping item management method.
Background technology
The development of computer network just experienced by the time of short decades grows out of nothing, from simple to complexity, from a room to the process spread all over the world.Network has brought abundant information and brand-new service, also brings new study, Working and life styles simultaneously.Along with the continuous growth of host number of access Internet and network can provide the continuous expansion extension of service range, supporting network run with the procotol of providing services on the Internet also constantly develop and perfect in, present Internet by IPv4 agreement to IPv6 Protocol interim.But in the computer network system in modern times, router is most crucial connection device.The develop rapidly of the Internet be unable to do without the technological innovation of router.Next Generation Internet proposes new demand to ip router architecture of future generation.The router of support IPv4 network and the IPv6 network interconnection is the main flow direction that ip router of future generation develops.
In the router architecture supporting IPv4 network and the IPv6 network interconnection, how the mapping item had between the IPv4 data flow of state and IPv6 data flow rationally arranged and manage, thus the utilance improving hardware table item always is the hot issue of research.Current mapping item is generally stored on hardware device, and often costly, and the list item that can store also is limited to the price of hardware device.When having the IPv4 data flow of state and IPv6 data flow to carry out intercommunication, on the router supporting IPv4 network and the IPv6 network interconnection, need to record the mapping relations between a large amount of IPv4 data flow and IPv6 data flow.
Have the IPv6 network of state and the complete process of IPv4 network service to be all dimeric usually, namely IPv6 goes to IPv4 direction, and IPv4 goes to IPv6 direction, and the mapping item therefore for a data flow is two list items.The setting of mapping item is divided into data division and result part.The information of data division is used for mating with the feature field extracted in flow, and the design principle of list item is required hit data flow that can be unique.Result part is used to conversion and the transmission of carrying out IPv4 data flow and IPv6 data flow, therefore must can provide the transmission information of the transitional information of IPv6 or IPv4 agreement and IPv4 or the IPv6 message after changing.Mapping item generation method conveniently, the data division that IPv6 goes to the mapping item in IPv4 direction is IPv6 address, five-tuple < source, object IPv6 address, IPv6 message source port numbers, IPv6 message destination slogan, IPv6 message protocol >, result part is IPv4 address, < source, object IPv4 address, IPv4 message source port numbers, IPv4 message destination slogan, IPv4 outgoing interface >; The data division that IPv4 goes to the mapping item in IPv6 direction is five-tuple < object IPv4 address, IPv4 address, source, IPv4 message destination slogan, IPv4 message source port numbers, IPv4 message protocol >, result part is turn rear < object IPv6 address, IPv6 address, source, IPv6 message destination slogan, IPv6 message source port numbers, IPv6 outgoing interface >.If mapping item generation method conveniently, need for each data flow safeguards two mapping tables simultaneously, these two mapping tables need to take larger hardware device memory headroom, and the entry of mapping item also will be very huge when the IPv6 network and the IPv4 network service that have state, have the IPv6 network of state and IPv4 network service to have timeliness feature simultaneously, there will be list item use a period of time after can not again by situation about using.
Therefore how taking into account to meet has the IPv6 network of state and IPv4 network service needs and avoids hardware table item capacity overload to be prevent from propping up the key issue that system bottleneck appears in the IPv6 network of held state and IPv4 network service router.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is, for the deficiencies in the prior art, there is provided a kind of have IPv6 and the IPv4 of state to communicate mapping item and mapping item management method, have the IPv6 network of state and IPv4 network service needs and the object avoiding hardware table item capacity overload for realizing taking into account meeting.
(2) technical scheme
Technical solution of the present invention is as follows:
There is an IPv6 and IPv4 network service mapping item for state, comprise data division and result part;
Described data division comprises: IPv6 address, source, IPv6 source port number, IPv6 protocol number, object IPv4 address, IPv4 message destination slogan and IPv4 protocol number;
Described result part comprises: IPv4 address, source, source IPv4 port numbers, IPv4 next hop address, IPv4 outgoing interface number, object IPv6 address, IPv6 message destination slogan, IPv6 next hop address, IPv6 outgoing interface number and hardware register address.
Based on a mapping item management method for above-mentioned mapping item, comprising:
S1. the memory headroom of initialization mapping item and hardware keep-alive register;
S2. receive IPv4 message or IPv6 message, extract and generate mapping item information;
S3. be hardware keep-alive register assignment 1 and add mapping item to router hardware.
Preferably, also comprise after described step S3:
S4. after mapping item time-out, it is reclaimed in router hardware.
Preferably, described step S2 comprises:
Judge type of message:
If IPv4 message: then extract the object IPv4 address of message, IPv4 message destination slogan and IPv4 protocol number;
If IPv6 message: then extract the IPv6 address, source of message, IPv6 source port number and IPv6 protocol number.
Preferably, described step S3 comprises:
Judge that whether the memory headroom of mapping item is full:
Be: then point out user memory space full;
No: then to obtain hardware keep-alive register address, for hardware keep-alive register assignment 1 and to router hardware interpolation mapping item.
Preferably, described step S4 comprises:
Read whether the value judging hardware keep-alive register is-1:
Be: then continue to read judgement;
No: whether then read the value judging hardware keep-alive register is 1:
Be: then hardware keep-alive register is set to 0;
No: then delete the mapping item in router hardware when timestamp and current time differ by more than the scheduled time, and the value resetting hardware keep-alive register to be-1.
Preferably, the described scheduled time is 10s.
(3) beneficial effect
IPv6 and the IPv4 network service mapping item having state provided by the present invention, comprises data division and result part; Data division comprises: IPv6 address, source, IPv6 source port number, IPv6 protocol number, object IPv4 address, IPv4 message destination slogan and IPv4 protocol number; Result part comprises: IPv4 address, source, source IPv4 port numbers, IPv4 next hop address, IPv4 outgoing interface number, object IPv6 address, IPv6 message destination slogan, IPv6 next hop address, IPv6 outgoing interface number and hardware register address; Compared with designing with traditional mapping item, the present invention decreases object IPv6 address, IPv6 message destination slogan, IPv4 address, source and IPv4 message source port numbers at data division, IPv6 address, source, IPv6 message source port numbers, IPv4 address, source and IPv4 message source port numbers is decreased in result part, and because all information fusion are in a mapping table, therefore greatly save hardware memory space, also reduce maintenance cost simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of IPv6 and the IPv4 network service mapping item having state in the embodiment of the present invention;
Fig. 2 is IPv6 and the IPv4 network service mapping item managerial structure topology schematic diagram having state in the embodiment of the present invention;
Fig. 3 is the router software some work schematic flow sheet of mapping item management method in the embodiment of the present invention;
Fig. 4 is the router hardware some work schematic flow sheet of mapping item management method in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described further.Following examples only for illustration of the present invention, but are not used for limiting the scope of the invention.
In prior art, the storage of the IPv6 network of state and the mapping item of IPv4 network service is had to need to spend a large amount of hardware memory space, therefore can by simplifying mapping item content and providing corresponding management method to reach the object using less hardware memory space.In the present embodiment, provide firstly a kind of IPv6 and IPv4 network service mapping item having state, as shown in fig. 1, this mapping item comprises data division and result part;
Wherein data division comprises: IPv6 address, source, IPv6 source port number, IPv6 protocol number, object IPv4 address, IPv4 message destination slogan and IPv4 protocol number;
Wherein result part comprises: IPv4 address, source, source IPv4 port numbers, IPv4 next hop address, IPv4 outgoing interface number, object IPv6 address, IPv6 message destination slogan, IPv6 next hop address, IPv6 outgoing interface number and hardware register address.
Compared with designing with traditional mapping item, mapping item in the present invention decreases object IPv6 address, IPv6 message destination slogan, IPv4 address, source and IPv4 message source port numbers at data division, IPv6 address, source, IPv6 message source port numbers, IPv4 address, source and IPv4 message source port numbers is decreased in result part, and because all information fusion are in a mapping table, therefore greatly save hardware memory space, also reduce maintenance cost simultaneously.
Additionally provide a kind of mapping item management method based on above-mentioned mapping item in the present embodiment, comprising:
S1. the memory headroom of initialization mapping item and hardware keep-alive register;
S2. receive IPv4 message or IPv6 message, extract and generate mapping item information;
Wherein, step S2 comprises:
Judge type of message:
If IPv4 message: then extract the object IPv4 address of message, IPv4 message destination slogan and IPv4 protocol number;
If IPv6 message: then extract the IPv6 address, source of message, IPv6 source port number and IPv6 protocol number.
S3. be hardware keep-alive register assignment 1 and add mapping item to router hardware.
Wherein, also comprise after step S3:
Wherein, step S3 comprises:
Judge that whether the memory headroom of mapping item is full:
Be: then point out user memory space full;
No: then to obtain hardware keep-alive register address, for hardware keep-alive register assignment 1 and to router hardware interpolation mapping item.
S4. after mapping item time-out, it is reclaimed in router hardware.
Wherein, step S4 comprises:
Read whether the value judging hardware keep-alive register is-1:
Be: then continue to read judgement;
No: whether then read the value judging hardware keep-alive register is 1:
Be: then hardware keep-alive register is set to 0;
No: then delete the mapping item in router hardware when timestamp and current time differ by more than the scheduled time, and the value resetting hardware keep-alive register to be-1.
Wherein, the scheduled time is 10s.
The workflow of said method in the IPv6 network having state as shown in Figure 2 and IPv4 network service mapping item management topologies is as shown in Fig. 3 and Fig. 4.
Based on the mapping item management method of the IPv6 network and IPv4 network service that have state router software some work flow process as shown in Figure 3, this management method that what this figure was more detailed set forth is in the concrete behavior of router software and operation: wherein, steps A 1 and steps A 2 complete router software needs initialized two tables after powering, mapping item keep-alive table and hardware mapping item memory headroom service condition table respectively, router software receives the ipv6 traffic message going to IPv4 network and the IPv4 traffic messages going to IPv6 network, extraction to mapping item information and generation is completed by steps A 3, the interpolation to hardware mapping item is completed by steps A 4 and steps A 5, the recovery to overtime hardware mapping item is completed by steps A 6.Wherein the direction of arrow represents the direction that router software performs.
Based on the mapping item management method of the IPv6 network and IPv4 network service that have state router hardware some work flow process as shown in Figure 4, this management method that what this figure was more detailed set forth is in the concrete behavior of router hardware and operation: wherein complete router hardware after starting shooting by the memory headroom of initiating hardware mapping item and hardware keep-alive register by steps A 8 and steps A 9, router hardware is after the data message receiving IPvA4 and IPvA6 network service, completed by steps A 10 and operation is hit to the mapping item of flow, and to the assignment of hardware keep-alive register.Wherein the direction of arrow represents the direction that router hardware performs.
The present invention be the router needing the IPv4 data flow of real standing state and IPv6 data flow to carry out passing through provide one not only economy but also take into account efficiently meet and have the IPv6 network of state and IPv4 network service needs and the solution avoiding hardware table item capacity overload.The present invention passes through having in state I Pv4 data flow and IPv6 data flow communication, can the feature field of unique hiting data stream simplify, meet have the IPv4 data flow of state and the demand of IPv6 data flow communication under, that takes into account again decreases mapping item occupying hardware memory space, effectively alleviates the problem that hardware memory space is limited.Simultaneously, the present invention is coordinated by router hardware and router software, hardware mapping item service condition is detected, thus the hardware mapping item internal memory be not hit for a long time is released, can effectively solve the limited and mapping item of hardware memory space increase between contradiction.
Above execution mode is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification, therefore all equivalent technical schemes also belong to protection category of the present invention.
Claims (7)
1. the mapping item having IPv6 and the IPv4 of state to communicate, is characterized in that, comprises data division and result part;
Described data division comprises: IPv6 address, source, IPv6 source port number, IPv6 protocol number, object IPv4 address, IPv4 message destination slogan and IPv4 protocol number;
Described result part comprises: IPv4 address, source, source IPv4 port numbers, IPv4 next hop address, IPv4 outgoing interface number, object IPv6 address, IPv6 message destination slogan, IPv6 next hop address, IPv6 outgoing interface number and hardware register address.
2., based on a mapping item management method for mapping item according to claim 1, it is characterized in that, comprising:
S1. the memory headroom of initialization mapping item and hardware keep-alive register;
S2. receive IPv4 message or IPv6 message, extract and generate mapping item information;
S3. be hardware keep-alive register assignment 1 and add mapping item to router hardware.
3. mapping item management method according to claim 2, is characterized in that, also comprises after described step S3:
S4. after mapping item time-out, it is reclaimed in router hardware.
4. the mapping item management method according to Claims 2 or 3, is characterized in that, described step S2 comprises:
Judge type of message:
If IPv4 message: then extract the object IPv4 address of message, IPv4 message destination slogan and IPv4 protocol number;
If IPv6 message: then extract the IPv6 address, source of message, IPv6 source port number and IPv6 protocol number.
5. mapping item management method according to claim 4, is characterized in that, described step S3 comprises:
Judge that whether the memory headroom of mapping item is full:
Be: then point out user memory space full;
No: then to obtain hardware keep-alive register address, for hardware keep-alive register assignment 1 and to router hardware interpolation mapping item.
6. the mapping item management method according to claim 2-3 or 5, is characterized in that, described step S4 comprises:
Read whether the value judging hardware keep-alive register is-1:
Be: then continue to read judgement;
No: whether then read the value judging hardware keep-alive register is 1:
Be: then hardware keep-alive register is set to 0;
No: then delete the mapping item in router hardware when timestamp and current time differ by more than the scheduled time, and the value resetting hardware keep-alive register to be-1.
7. mapping item management method according to claim 6, is characterized in that, the described scheduled time is 10s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310269298.1A CN104253876B (en) | 2013-06-28 | 2013-06-28 | The mapping item and management method that stateful IPv6 communicates with IPv4 |
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| CN201310269298.1A CN104253876B (en) | 2013-06-28 | 2013-06-28 | The mapping item and management method that stateful IPv6 communicates with IPv4 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120601A (en) * | 2018-07-24 | 2019-01-01 | 深圳市天威视讯股份有限公司 | IPv4 and IPv6 interoperability methods and system based on program request signaling |
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| JP4670979B2 (en) * | 2009-06-11 | 2011-04-13 | 株式会社日立製作所 | PACKET GENERATION METHOD, INFORMATION PROCESSING DEVICE HAVING THE FUNCTION, AND RECORDING MEDIUM CONTAINING PACKET GENERATION PROGRAM |
| CN103167046A (en) * | 2011-12-09 | 2013-06-19 | 华为技术有限公司 | Method, device and system for acquiring multicast address |
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Patent Citations (4)
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| CN1440168A (en) * | 2003-03-31 | 2003-09-03 | 中国科学院计算机网络信息中心 | IPV4 network logon layered switching network method |
| JP4670979B2 (en) * | 2009-06-11 | 2011-04-13 | 株式会社日立製作所 | PACKET GENERATION METHOD, INFORMATION PROCESSING DEVICE HAVING THE FUNCTION, AND RECORDING MEDIUM CONTAINING PACKET GENERATION PROGRAM |
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