CN1275441C - IPV6 nameplate receiver and IPV6 nameplate processing method - Google Patents
IPV6 nameplate receiver and IPV6 nameplate processing method Download PDFInfo
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- CN1275441C CN1275441C CNB2004100326619A CN200410032661A CN1275441C CN 1275441 C CN1275441 C CN 1275441C CN B2004100326619 A CNB2004100326619 A CN B2004100326619A CN 200410032661 A CN200410032661 A CN 200410032661A CN 1275441 C CN1275441 C CN 1275441C
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Abstract
An IPv6 header receiving apparatus and an IPv6 header processing method includes a register with a data size that is a multiple of an octet and modules for an IPv6 basic header or various types of IPv6 extended headers. The register receives IPv6 header data in units of an octet, stores the IPv6 header data, and transmits the stored IPv6 header data to an IPv6 processing module for that corresponds to the IPv6 header data. The modules receive the IPv6 header data from the register and process the IPv6 header data. Accordingly, IPv6 header data can be processed in real-time without wasting memory.
Description
The cross reference of related application
The application requires the priority of the korean patent application submitted in Korea S Department of Intellectual Property on January 13rd, 2003 2003-2086 number.It is disclosed in, and this is whole involved with as a reference.
Technical field
The present invention relates to the apparatus and method of a kind of reception and process IP header, more specifically, relate to a kind of receiving system of the ipv6 header that can on hardware, realize and a kind of processing method of ipv6 header.
Background technology
In order to solve the deficiency by caused 32 bit Internet Protocol (IP) addresses of the quick growth of network and IP node, internet engineering task group (IETF) begins to develop a kind of IPv6 agreement and replaces the IPv4 agreement and just begin to develop the IPv6 agreement beginning of the sixties at twentieth century.On the basis of the experience that design IPv4 agreement is accumulated, the IPv6 agreement is to design by adding new feature to the IPv4 agreement.
The major part of IPv6 agreement is realized by software.In other words, in being realized by the software of traditional IP agreement, the grouping that receives from lower level is replicated and is stored in the memory to be handled subsequently.In the software of traditional IP agreement was realized, the transfer of data between layer and the layer utilized pointer to be realized by storage buffer chain type method.
Fig. 1 shows the structure of traditional IPv6 agreement input module.When the mac controller 120 of deal with data link layer and physical layer, when collecting the data corresponding to a frame, this mac controller 120 utilizes CRC check and determines whether this frame is damaged.If frame does not have impaired, then mac controller 120 by the dedicated interrupt terminal with transmitted in packets to machine 110.Processor 111 in the machine 110 utilizes pointer 112 to receive from the data in the memory 113, handles the data that received, and with the position of the data rewrite of being handled in memory 113.Like this, the packet transaction in each layer is finished by the rewriting to memory.
Yet in the software of such IP was realized, the memory of stores packets was absolutely necessary, so, need the extra time to visit memory.Mean remarkable delay this extra time, therefore, in the machine of TCP/IP-port, produce very big expense grouping.
Fig. 2 shows the form of expansion ipv6 header.Ipv6 header comprises the version field of the IP version number of 4 of expressions; One 8 business type field (traffic class field); One 20 flow attribute field (flow label field); A pay(useful) load length field (payload length field), this field is represented the length of IPv6 pay(useful) load, and is made up of signless 16 integers; Next header fields (next header field), this field is one 8 a selector, is used to identify the type of ipv6 header extension header afterwards; One 8 relaying limited field (hop limit field); The source address field of one 128 expression source of packets; And the destination address field (DAF) of one 128 expression grouping purpose.
The IPv6 grouping may not have extension header, or has an extension header or a plurality of extension header.Each extension header identifies by next header fields that is included in last basic header or the extension header.Each extension header has the length of 8 eight hytes (octet) multiple.
Expansion IPv6 grouping shown in Figure 2 comprises 6 extension headers.If in a grouping, used a plurality of extension headers, then between ipv6 header and last layer header (not shown), can one of sequence arrangement select extension header (hop-by-hop option extended header) piecemeal, extension header (destination option extended header) is selected in a destination, a route extension header (routing extendedheader), a segmentation extension header (fragment extended field), extension header is selected in a checking extension header (authentication extended field) and a destination.
Select extension header to be used to transmit selective information piecemeal, this information is examined at each node along packet transmission path.
Selecting next header fields in the extension header piecemeal is the type that one 8 selector and identification follow the header after selecting extension header piecemeal closely.Select the extension header length field in the extension header to be expressed by 8 integers of no symbol piecemeal, its expression is the length of selecting extension header piecemeal that unit forms with 8 eight hytes.Next field of extension header length field is a variable length, and it comprises an option.Next header fields and extension header length field are generally used in all extension headers.
The route extension header is used to list a plurality of intermediate nodes that must visit when a grouping when the IPv6 source address is sent to destination address.
When the length of grouping greater than maximum trasfer unit (MTU), and this grouping be must be sent to destination address from the source address of IPv6 the time, use segmentation extension header.
The destination selects extension header to be used to transmit selective information, and this information is checked by the destination node of specified in packets.
Fig. 3 A to 3C shows the header structure that different link layers are realized IPv6.As shown in Figure 3A, comprise a purpose ethernet address, source ethernet address and ipv6 header and pay(useful) load based on the ipv6 header of Ethernet.Shown in Fig. 3 B, comprise a purpose FDDI address, FDDI address, a source and ipv6 header and pay(useful) load based on the ipv6 header of Fiber Distributed Data Interface (FDDI).
Shown in Fig. 3 C, comprise a destination address, source address and ipv6 header and pay(useful) load based on the ipv6 header on the token-ring network.From Fig. 3 A to 3C as can be seen, ipv6 header with 8 eight hytes for unit is processed no matter the type that link layer is realized.
Traditional IPv6 receiving system is owing to memory inserts the stand-by period that required frequency has a growth.When traditional IPv6 receiving system is realized on hardware, need an additional space to be used to predict and calculate the length of variable extension header.
Summary of the invention
Different aspect of the present invention and/or advantage will partly be proposed in the following description, partly, will obtain significantly from describe, and perhaps can be learnt by practice of the present invention.
According to an aspect of the present invention, provide a kind of and need not spend ipv6 header receiving system and a kind of ipv6 header processing method that memory just can be handled ipv6 header in real time.
According to an aspect of the present invention, a kind of ipv6 header receiving system is provided, this device comprises the register with a plurality of eight hyte data size, this register is that unit receives the ipv6 header data with eight hytes, storing IP v6 header data, and the transmission ipv6 header data of being stored are to the module that is used for handling with the corresponding ipv6 header of ipv6 header data, and the module that is used for basic header of IPv6 or dissimilar IPv6 extension header, this module receives ipv6 header data and process IP v6 header data from register.
According to an aspect of the present invention, also provide a kind of ipv6 header receiving system, comprise counter, increase progressively that to count up to each be the IPv6 extension header data volume that unit can be transmitted with eight hytes; Register with data length of a plurality of eight hytes, with eight hytes is that unit receives the ipv6 header data, storing IP v6 header data, and, if having finished, counter counts up to a special value, then the transmission ipv6 header data of being stored are to the module that is used to handle corresponding to the ipv6 header of ipv6 header data, and the module that is used for basic header of IPv6 or dissimilar IPv6 extension header, and this module receives ipv6 header data and process IP v6 header data from register.
According to an aspect of the present invention, a kind of ipv6 header receiving system also is provided, comprises eight hyte indicating devices, register, controller and be used for the basic header of IPv6 or the module of dissimilar IPv6 extension header with data size of a plurality of eight hytes.Eight hyte indicating devices increase progressively that to count up at every turn with eight hytes be the quantity of the unit IPv6 extension header data that can be transmitted.Ipv6 header data and storing IP v6 header data that it is unit that register receives with eight hytes.The ipv6 header data of control unit analyzing stored in register are to determine the type and the length of corresponding ipv6 header data.Count up to a special value if eight hyte indicating devices have been finished to increase progressively, then control unit makes the ipv6 header transfer of data with length-specific to the module that is used to handle corresponding to the ipv6 header of ipv6 header type.The module that is used for basic header of IPv6 or dissimilar IPv6 extension header receives ipv6 header data and process IP v6 header data from register.
According to an aspect of the present invention, a kind of ipv6 header processing method is provided, this method is included in and fills with preliminary dimension in the register is the ipv6 header data that unit receives, these data are a plurality of eight hytes, discern the ipv6 header type by analyzing the Pv6 header data of filling in the register then, and transmission ipv6 header data are to the module corresponding to the Pv6 header type of having discerned.
According to an aspect of the present invention, provide a kind of ipv6 header processor, comprising: the data link layer parts are used for transfer of data; The IPv6 controller, in response to header data from the transfer of data of described data link layer parts, and detect the type and the length of described header data, export described header data according to the type and the length of detected header data in described transfer of data; With register file parts with a plurality of ipv6 header processing modules, be coupled to described IPv6 controller, each ipv6 header processing module receives and handles the corresponding header data by described IPv6 controller transmission.
According to an aspect of the present invention, provide a kind of method that is treated to the header data of a plurality of eight hytes, comprising: the packet mode with the length of a plurality of eight hytes moves header data to the first register; Transmit described header data to the second register, in described second register, preserve header data; Determine the type and the length of described header data, determine to remain on the outgoing route of the header data in described second register thus; When each header data during, increase Counter Value from first register transfer to the second register; When counter reaches a predetermined value,, the content of described second register is moved to the predetermined process module by determined outgoing route.
Description of drawings
These and/or others of the present invention and advantage will become clear and estimate easily from the description of following examples, comprise the following drawings:
Fig. 1 shows the example of the structure of a Traditional IP v6 input module.
Fig. 2 shows the form of an expansion ipv6 header.
Fig. 3 A to 3C shows the header structure of the IPv6 that realizes with different link layers.
Fig. 4 is the block diagram of ipv6 header receiving system according to an embodiment of the invention.
Fig. 5 shows the detailed structure of next the header status register among Fig. 4; And
Fig. 6 is the flow chart that is used to illustrate ipv6 header processing method according to an embodiment of the invention.
Embodiment
Describe embodiments of the invention now in detail, its example is illustrated in the accompanying drawing, and wherein identical Reference numeral is represented components identical from start to finish.The following describes embodiment with by explaining the present invention with reference to the accompanying drawings.
Because the processing of ipv6 header form is based on 8 eight hytes, IPv6 implement device according to the present invention is to utilize to monitor that the extra means of 8 eight hytes is with hard-wired.
With reference to figure 4, comprise IP receiver module 400 and register file 450 according to the ipv6 header receiving system of the embodiment of the invention.IP receiver module 400 is that unit receives the data of ipv6 header and 8 eight hytes that transmission was received to register file 450 with 8 eight hytes.Register file 450 receives and handles ipv6 header.
IP receiver module 400 comprises control unit 410, temporary register 420, shift register 430 and eight hyte indicating devices 440.Temporary register 420 receives data and stores the data that received from link layer 460, and wherein data volume depends on the type of interface.For example, if use is pcmcia interface, then the size of temporary register 420 will be 2 eight hytes.
After data were stored in the temporary register 420, control unit 410 was analyzed data immediately, sent the transmission order that is used for to shift register 430 transmission data, and the data volume of notifying eight hyte indicating devices 440 dynamically to be received.
More specifically, control unit 410 comprises header analyzer 411, next header status register 412, length register 413 and path determiner 414.
Header analyzer 411 is analyzed the data that receive from temporary register 420, determine the type and the length of the header corresponding, and the type of next header and the length of next header are set respectively in next header status register 412 and length register 413 with data.More specifically, expansion ipv6 header shown in Figure 2 comprises one 8 next header fields and one 8 extension header length field.The type of next extension header after the current extension header can be determined by next header fields, and the length of next extension header can be determined by the extension header length field.These analysis results are set in next header status register 412 and the length register 413.
The data of the existing extension header type of next header status register 412 storage representation.The detailed structure of next header status register 412 as shown in Figure 5.
With reference to figure 5, next header status register 412 comprises that purpose selects safe payload (ESP) position of header (DOH) position (destination node position), an encapsulation, an Authentication Header (AH) position, a fragmentation header (FH) position, a route header (RH) position, a DOH position (intermediate node position), one header (HBH) and reservation piecemeal.If there is an extension header, then corresponding position will be set to true.When packet transaction finished, each was set to vacation.
Next header status register like this provides and has been used for verification and calculates required field information on network layer, and is provided at because the mistake of header fields or the mistake of the network media, and the control signal of using when producing ICMP message.
The data of extension header length are represented in length register 413 storages.
Path determiner 414 utilizes the information that is stored in next header status register 412 and the length register 413 to determine which module in the register file 450 receives the data that are stored in the shift register 430.In case path determiner 414 has determined that with data quantity transmitted then its indication shift register 430 transmits the particular module of the data volume of institute's quantification to register file 450.
Shift register 430 receives the data of 2 eight hytes and waits until always from temporary register 420 at every turn and is accumulated to 8 eight hytes.When accumulating 8 eight hytes, based on path determiner 414 determined information, shift register 430 moves on to register file 450 with the data of these 8 eight hytes.
Eight hyte indicating device 440 receptions are counted the data that receive 8 eight hytes up to shift register 430 corresponding to the count number and the continuation of the data of eight hytes.
Auxiliary counter 441 counts up to the data of 8 eight hytes, and this data volume is corresponding to the quantity that is stored in the quantity in the shift register 430 and is transferred to register file 450 simultaneously.Basic counter 442 calculates the maximum effective length of each extension header.Simultaneously, basic counter 442 receives corresponding to the information from the extension header length of header analyzer 411, and help shift register 430 to receive and send corresponding to the correct data amount of an extension header length module to register file 450, this module can be handled the header of corresponding data.
Register file 450 comprises basic header module 451, route header module 452, AH module 453, ESP module 454, DOH module 455, HBH module 456 and upper layer module 457.
Each module of register file 450 receives data with predetermined unit from shift register 430.When the content of a header is all received, this header of each resume module.
Fig. 6 is the flow chart that is used to illustrate according to ipv6 header processing method of the present invention.At first in operation S610, IP receiver module 400 is waited for the transfer of data of link layer 460.
In operation S620, the MAC layer sends data with predetermined unit to IP receiver module 400.
In operation S630, IP receiver module 400 is stored data in temporary register 420.For example, the data that received can be the unit storage with 2 eight hytes.
In operation S640, the header analyzer 411 of control unit 410 receives and the data of analyzing stored in temporary register 420, and the data path that path determiner 414 is determined in the shift register 430.In other words, header analyzer 411 can be determined the type and the length of next extension header of current preamble.The type of next extension header is stored in next header status register 412, and the length of next extension header is stored in the length register 413.Simultaneously, header analyzer 411 data volume that will be reached each header module about the information and the notice shift register 430 of the length of each extension header to basic counter 442 transmission.When path determiner 414 had determined which module reception is stored in the data of shift register 430, the information that is stored in next header status register 412 and the length register 413 just was used.
In operation S650, the header data that is stored in the temporary register 420 is transferred to shift register 430.
In operation S660, determine whether auxiliary counter 441 stops.For example, if the length of temporary register 420 is 2 eight hytes, the length of shift register 430 is 8 eight hytes, and when counting reaches 4, auxiliary counter 441 will stop counting.
If determine that in operation S660 auxiliary counter 441 does not also stop counting, then this method is got back to operation S630, and wherein the data that received from the MAC layer are stored in the temporary storage 420.
If determine that in operation S660 auxiliary counter 441 has stopped counting, then next in operation S670, the data of 8 eight hytes of path determiner 414 indication shift registers, 430 transmission are to the module of register file 450.
In operation S680, determine whether the value of basic counter 442 has surpassed predetermined value.Because basic counter 442 keeps represent the information of next extension header length, basic counter 442 helps all data to one that constitute next extension header of shift registers 430 transmission can handle the module of next extension header.
If determine that in operation S680 the value of basic counter does not exceed predetermined value, i.e. the length of next extension header, then this method is got back to operation S620, and wherein the MAC layer is with predetermined unit transmission L3 data.
Surpassed predetermined value if determine the value of basic counter in operation S680, S690 receives next grouping in operation.If the value of basic counter has exceeded predetermined value, if promptly the actual reception data volume then can be determined wrong generation in extension header greater than next extension header length data designated amount.In this case, replace received, follow the extension header current extension header after, do not use grouping, and reception and handle next grouping corresponding to current extension header.
As mentioned above, according to IPv6 receiving system of the present invention not needs storage device is installed just can on hardware, be realized.Thereby data can be processed in real-time, and the data processing time of IPv6 receiving system, memory span and production cost have been reduced.
Although only show and described several embodiments of the present invention, but to one skilled in the art, without departing from the principles and spirit of the present invention, can make amendment to embodiment, scope of the present invention is determined by claim and equivalent thereof.
Claims (18)
1. ipv6 header receiving system comprises:
Register, data size with a plurality of eight hytes, described register is that unit receives the ipv6 header data with eight hytes, store described ipv6 header data, and the ipv6 header data that transmission is stored is to the ipv6 header processing module corresponding to the ipv6 header data; With
The ipv6 header processing module is used for basic header of IPv6 or dissimilar IPv6 extension headers, and described ipv6 header processing module receives described ipv6 header data and handles described ipv6 header data from described register.
2. ipv6 header receiving system as claimed in claim 1 also comprises:
Counter, counting up to eight hytes is the specific quantity of the unit IPv6 extension header data that at every turn can send; And wherein
Count up to described specific quantity if described counter is finished, then the described register transfer ipv6 header data of storing are to the ipv6 header processing module that is used to handle corresponding to the ipv6 header data.
3. ipv6 header receiving system comprises:
Eight hyte indicating devices, counting up at every turn with eight hytes is the specific quantity of the IPv6 extension header data that can transmit of unit;
Register has the data size of a plurality of eight hytes, and described register is that unit receives the ipv6 header data and stores described ipv6 header data with 8 eight hytes;
Control unit, the ipv6 header data of analyzing stored in described register are to determine and ipv6 header data corresponding type and length, and, count up to described specific quantity if described eight hyte indicating devices are finished to increase progressively, described eight hyte indicating devices indicate described register will have the ipv6 header transfer of data of definite length to corresponding to the IP header processing module of determined ipv6 header type; With
Be used for the ipv6 header processing module of basic header of IPv6 or dissimilar IPv6 extension header, described ipv6 header processing module receives described ipv6 header data and handles described ipv6 header data from described register.
4. ipv6 header receiving system as claimed in claim 3, wherein said register comprises:
Temporary register, the data length with a plurality of eight hytes is that unit receives the ipv6 header data and stores described ipv6 header data with eight hytes; With
Shift register, be that unit receives described ipv6 header data from described temporary register with eight hytes at every turn, if and described shift register is filled the data volume that will be transferred to the ipv6 header processing module at every turn, the data volume that then described shift register transmission is filled is to described ipv6 header processing module.
5. ipv6 header receiving system as claimed in claim 4, wherein said control unit comprises:
The header analyzer receives data and analyzes described data from described temporary register;
Next header status register, according to the information that the analysis from described header analyzer obtains, the information of next header type after current preamble is followed in storage;
Length register, according to the information that obtains from described analysis, the header length information of described next header of storage; With
The path determiner, indicate described shift register with data volume that is transmitted and the ipv6 header processing module that receives data, specify in the header length information of described data volume in being stored in described length register, and specify in described ipv6 header processing module next header type information in being stored in next header status register.
6. ipv6 header receiving system as claimed in claim 5, wherein said eight hyte indicating devices comprise:
Auxiliary counter increases progressively and counts up to the data volume that is stored in the described shift register; With
Basic counter, increase progressively count up to be stored in described length register in the corresponding data volume of header length information, if and the current counting of described basic counter surpasses the value corresponding to header length information, then described control unit indicates described temporary register to receive the data of next grouping.
7. ipv6 header receiving system as claimed in claim 3, wherein said ipv6 header processing module comprise that basic header module, route header module, purpose select header module, Authentication Header module, ESP header module, header module and upper layer module piecemeal.
8. ipv6 header processing method comprises:
In order to preliminary dimension is the ipv6 header data buried register that unit receives, and described preliminary dimension is a plurality of eight hytes;
Discern the ipv6 header type by the ipv6 header data of analyzing stored in described register; With
Transmit described ipv6 header data to module corresponding to the ipv6 header type of having discerned.
9. ipv6 header processor comprises:
The data link layer parts are used for transfer of data;
The IPv6 controller, in response to header data from the transfer of data of described data link layer parts, and detect the type and the length of described header data, export described header data according to the type and the length of detected header data in described transfer of data; With
Register file parts with a plurality of ipv6 header processing modules are coupled to described IPv6 controller, and each ipv6 header processing module receives and handle the corresponding header data by described IPv6 controller transmission.
10. processor as claimed in claim 9, wherein said IPv6 controller comprises:
Memory register is used for storing the header data of transfer of data;
Counter when receiving the header data of eight hytes, increases the value of indicating device; With
Control unit, detect the type and the length of described header data, value according to described indicating device, from the extremely corresponding ipv6 header processing module of described memory register output header data, wherein said corresponding ipv6 header processing module determines that according to detected header data type and length wherein said corresponding ipv6 header processing module is handled described header data.
11. processor as claimed in claim 10, wherein said memory register and described ipv6 header processing module are all with a plurality of eight hyte deal with data.
12. processor as claimed in claim 10, wherein said memory register comprises:
Buffer register is used to receive the data with a plurality of eight hytes transmission; With
Transmission register, wherein said buffer register is exported the header data of a plurality of eight hytes to the transmission register of storing header data, and when described indicator value equaled predetermined value, under the indication of described control unit, the content of described transmission register was output.
13. processor as claimed in claim 12, described control unit comprises:
The header analyzer receives type and length that data are also determined described header data from described buffer storage;
The NextState register, storage is by the type of the determined header data of described header analyzer;
Length register, storage is by the length of the determined header data of described header analyzer; With
The outgoing route determiner in response to the content of described NextState register and described length register, is directed at corresponding ipv6 header processing module with the content of described transmission register.
14. a method that is treated to the header data of a plurality of eight hytes comprises:
Packet mode with the length of a plurality of eight hytes moves header data to the first register;
Transmit described header data to the second register, in described second register, preserve header data;
Determine the type and the length of described header data, determine to remain on the outgoing route of the header data in described second register thus;
When each header data during, increase Counter Value from first register transfer to the second register;
When counter reaches a predetermined value,, the content of described second register is moved to the predetermined process module by determined outgoing route.
15. method as claimed in claim 14, wherein said header data are the forms of IPv6.
16. method as claimed in claim 15 also comprises:
Calculate the maximum effective length of each header data; With
Whether the maximum effective length of determining each header data surpasses predetermined value, wherein, if predetermined value is exceeded, then receives next header data grouping.
17. method as claimed in claim 16, if wherein predetermined value is not exceeded, then the additional header data are moved to described first register.
18. the method for claim 16 also comprises:
Receive header data from MAC layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| KR2086/2003 | 2003-01-13 | ||
| KR2086/03 | 2003-01-13 | ||
| KR1020030023057A KR100561397B1 (en) | 2003-01-13 | 2003-04-11 | Apparatus and method for power consumption reduction using power saving polling list |
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| CN1531285A CN1531285A (en) | 2004-09-22 |
| CN1275441C true CN1275441C (en) | 2006-09-13 |
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| JP7390879B2 (en) * | 2019-12-05 | 2023-12-04 | 三菱重工業株式会社 | Communication processing device, communication processing method and program, and data structure of the header part of the network layer |
| CN113765791B (en) * | 2020-06-02 | 2023-01-13 | 华为技术有限公司 | Method, node and system for determining processing capacity |
| CN114363432A (en) * | 2020-09-30 | 2022-04-15 | 华为技术有限公司 | Method, equipment and storage medium for acquiring message header information and generating message |
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