CN110519173A - A kind of lookup method and lookup system of IP five-tuple list item - Google Patents
A kind of lookup method and lookup system of IP five-tuple list item Download PDFInfo
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- CN110519173A CN110519173A CN201910854720.7A CN201910854720A CN110519173A CN 110519173 A CN110519173 A CN 110519173A CN 201910854720 A CN201910854720 A CN 201910854720A CN 110519173 A CN110519173 A CN 110519173A
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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
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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
- H04L45/748—Address table lookup; Address filtering using longest matching prefix
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- Computer Networks & Wireless Communication (AREA)
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- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of lookup method of IP five-tuple list item and search system, it is related to IP field of communication technology, this method includes searching normalizing table, the source IP address of up direction is mapped as source User ID, the purpose IP address mapping of down direction is purpose User ID；The source IP address of up direction in former IP five-tuple is replaced with into source User ID, the purpose IP address replacement of down direction is purpose User ID, constitutes new IP five-tuple, and the mark for marking up-downlink direction is added in new IP five-tuple；Route table items lookup is carried out using new IP five-tuple.The present invention can shorten the length of IP five-tuple, under the premise of guaranteeing routing forwarding performance, reduce list item resource required when IP five-tuple is searched significantly.
Description
Technical field
The present invention relates to IP (Internal Protocol, network protocol) fields of communication technology, and in particular to a kind of IP five
The lookup method and lookup system of tuple list item.
Background technique
Currently, family gateway equipment obtains large-scale application in optical access network.Route forwarding function in home gateway
It is to be realized according to IP five-tuple as stream process matching rule, IP five-tuple includes source IP address, purpose IP address, agreement
Type, source port number and destination slogan, protocol type include TCP (Transmission Control Protocol, transmission
Control protocol) and UDP (User Datagram Protocol User Datagram Protocol).
It is hung under home gateway for there are following two features: 1, standby limited amount is hung under, for example, certain operator's intelligence
The lower extension host of required support is less than 256 in energy gateway；2, standby address is hung under fixed prefix section, for example,
IPv4 (Internal Protocol Version 4, Internet protocol the 4th edition) the default LAN of home gateway (Local Area
Network, local area network) side IP address section be 192.168.1.0/24, IPv6 (Internal Protocol Version 6, mutually
Networking protocol the 6th edition) there is also above-mentioned similar features for address.
With the propulsion that Ministry of Industry and Information disposes IPv6 network, terminal device needs enhanced IP v6 tenability, and home gateway is set
Standby newly deployed default configuration supports double stacks, distributes the address IPv6 for gateway down-hanging equipment.To solve IPv4 address space not
Foot, IPv6 use 128 address spaces, and number of addresses is almost limitless, but the increase of the address IPv6 bit wide also makes IP five
The bit wide of tuple increases, and requirement of the home gateway to processing IP five-tuple concurrent connection number amount is higher and higher, and home gateway
Middle route forwarding function is to be realized according to IP five-tuple as stream process matching rule, and the increase of IP five-tuple bit wide causes
Flow table needed for corresponding stream process is increasing.
Summary of the invention
Based on hanging two standby features, in view of the deficiencies in the prior art, the purpose of the present invention under home gateway
It is to provide the lookup method and lookup system of a kind of IP five-tuple list item, the length of IP five-tuple can be shortened, guaranteeing road
Under the premise of by forwarding performance, list item resource required when IP five-tuple is searched is reduced significantly.
To achieve the above objectives, the lookup method of a kind of IP five-tuple list item provided by the invention, comprising the following steps:
Normalizing table is searched, the source IP address of up direction is mapped as source User ID, the purpose IP address of down direction is reflected
It penetrates as purpose User ID；
The source IP address of up direction in former IP five-tuple is replaced with into source User ID, the purpose IP address of down direction
Replacement is purpose User ID, constitutes new IP five-tuple, and the mark for marking up-downlink direction is added in new IP five-tuple
Know；
Route table items lookup is carried out using new IP five-tuple.
On the basis of above scheme, source IP address is mapped as source User ID by the lookup normalizing table, destination IP
Location mapping is purpose User ID, specific steps are as follows: up direction searches normalizing table using source IP address, and source IP address is mapped
For source User ID, down direction searches normalizing table using purpose IP address, and purpose IP address mapping is purpose User ID.
On the basis of above scheme,
The new IP five-tuple includes uplink IP five-tuple and downstream IP five-tuple；
The uplink IP five-tuple includes mark, source User ID, purpose IP address, protocol type, source port number and purpose
Port numbers；
The downstream IP five-tuple includes mark, source IP address, purpose User ID, protocol type, source port number and purpose
Port numbers.
It is described that source IP address is mapped as source User ID on the basis of above scheme, for the purpose of purpose IP address mapping
User ID, wherein mapping includes full mapping scenarios, prefix mapping scenarios, Compound Mappings scene and configurable mapping scenarios.
On the basis of above scheme,
The full mapping scenarios are to be mapped using source IP address or purpose IP address with full matching way；
The prefix mapping scenarios are to be mapped using the IP address prefix of source IP address or purpose IP address；
The Compound Mappings scene is to be mapped first using the IP address prefix of source IP address or purpose IP address, so
The address obtained after mapping and the address outside the IP address prefix of source IP address or purpose IP address are spliced afterwards, use spelling
The address connect is mapped；
The configurable mapping scenarios are the mapping mode for selecting full mapping scenarios or the mapping mode of Compound Mappings scene
It is mapped.
The present invention provides a kind of lookup system of IP five-tuple list item, comprising:
Mapping block is used to search normalizing table, and the source IP address of up direction is mapped as source User ID, downlink side
To purpose IP address mapping be purpose User ID；
Replacement module is used to the source IP address of up direction in former IP five-tuple replacing with source User ID, downlink side
To purpose IP address replacement be purpose User ID, constitute new IP five-tuple, and in new IP five-tuple addition for mark
The mark of down direction；
Searching module is used to carry out route table items lookup using new IP five-tuple.
On the basis of above scheme, the mapping block searches normalizing table, and source IP address is mapped as source User ID,
Purpose IP address mapping is purpose User ID, detailed process are as follows: up direction searches normalizing table using source IP address, by source IP
Address of cache is source User ID, and down direction searches normalizing table using purpose IP address, and purpose IP address mapping is purpose User
ID。
On the basis of above scheme,
The new IP five-tuple includes uplink IP five-tuple and downstream IP five-tuple；
The uplink IP five-tuple includes mark, source User ID, purpose IP address, protocol type, source port number and purpose
Port numbers；
The downstream IP five-tuple includes mark, source IP address, purpose User ID, protocol type, source port number and purpose
Port numbers.
On the basis of above scheme, source IP address is mapped as source User ID by the mapping block, and purpose IP address is reflected
It penetrates as purpose User ID, wherein mapping includes full mapping scenarios, prefix mapping scenarios, Compound Mappings scene and configurable mapping
Scene.
On the basis of above scheme,
The full mapping scenarios are to be mapped using source IP address or purpose IP address with full matching way；
The prefix mapping scenarios are to be mapped using the IP address prefix of source IP address or purpose IP address；
The Compound Mappings scene is to be mapped first using the IP address prefix of source IP address or purpose IP address, so
The address obtained after mapping and the address outside the IP address prefix of source IP address or purpose IP address are spliced afterwards, use spelling
The address connect is mapped；
The configurable mapping scenarios are the mapping mode for selecting full mapping scenarios or the mapping mode of Compound Mappings scene
It is mapped.
Compared with the prior art, the advantages of the present invention are as follows: by way of searching normalizing table in advance, source IP address is reflected
It penetrates as source User ID, purpose IP address mapping is purpose User ID, constitutes new IP five-tuple, shorten the length of IP five-tuple,
To under the premise of guaranteeing routing forwarding performance, reduce list item resource required when IP five-tuple is searched significantly.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the lookup method of IP five-tuple list item in the embodiment of the present invention；
Fig. 2 is the schematic diagram of full mapping scenarios in the embodiment of the present invention；
Fig. 3 is the schematic diagram of prefix mapping scenarios in the embodiment of the present invention；
Fig. 4 is the schematic diagram of Compound Mappings scene in the embodiment of the present invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.Those skilled in the art Ying Ming
White, the embodiment of the present invention can provide as method, system or computer program product.Therefore, complete hardware can be used in the present invention
The form of embodiment, complete software embodiment or embodiment combining software and hardware aspects.Moreover, the present invention can be used
One or more wherein includes that (including but not limited to disk is deposited for the computer-usable storage medium of computer usable program code
Reservoir, CD-ROM, optical memory etc.) on the form of computer program product implemented.
The embodiment of the present invention provides a kind of lookup method of IP five-tuple list item, by advance to source IP address and destination IP
Address carries out normalizing lookup, and the length for shortening IP five-tuple reduces IP five under the premise of guaranteeing routing forwarding performance significantly
Tuple list item resource required when searching.The embodiment of the present invention has also correspondingly provided a kind of lookup system of IP five-tuple list item
System.
It is shown in Figure 1, a kind of lookup method of IP five-tuple list item provided in an embodiment of the present invention, including following step
It is rapid:
S1: normalizing table is searched, the source IP address of up direction is mapped as source User (user) ID, the purpose of down direction
IP address mapping is purpose User ID.Normalizing table is the list item that user side IP address is normalized, and is used for user
Side IP address normalizes in the section of User ID.
In the embodiment of the present invention, normalizing table is searched, source IP address is mapped as source User ID, purpose IP address is mapped as
Purpose User ID, specific steps are as follows: up direction searches normalizing table using source IP address, and source IP address is mapped as source User
ID, down direction search normalizing table using purpose IP address, and purpose IP address mapping is purpose User ID.For home gateway
For, up direction refer to from (Local Area Network, the local area network) side LAN to WAN (Wide Area Network, extensively
Domain net) side.
S2: replacing with source User ID for the source IP address of up direction in former IP five-tuple, the destination IP of down direction
Location replacement is purpose User ID, constitutes new IP five-tuple, and the mark for marking up-downlink direction is added in new IP five-tuple
Know.Because there are up direction and down direction, therefore the new IP five-tuple constituted also includes uplink IP five-tuple and downstream IP five
Tuple, uplink IP five-tuple include mark, source User ID, purpose IP address, protocol type, source port number and destination slogan,
Downstream IP five-tuple includes mark, source IP address, purpose User ID, protocol type, source port number and destination slogan.Uplink
Mark in IP five-tuple is for marking up direction, and the mark in downstream IP five-tuple is for marking down direction.
S3: route table items lookup is carried out using new IP five-tuple.When the KEY value (key assignments) of new IP five-tuple and route table items
When matching, corresponding routing behavior is exported, completes the corresponding processing of data flow.
The lookup method of the IP five-tuple list item of the embodiment of the present invention, by way of searching normalizing table in advance, by source IP
Address of cache is source User ID, and purpose IP address mapping is purpose User ID, constitutes new IP five-tuple, shortens IP five-tuple
Length, to reduce list item resource required when IP five-tuple is searched significantly under the premise of guaranteeing routing forwarding performance.
Optionally, on the basis of a kind of lookup method of above-mentioned IP five-tuple list item, provided in an embodiment of the present invention one
In first alternative embodiment of the lookup method of kind IP five-tuple list item, source IP address is mapped as source User ID, destination IP
Address of cache is purpose User ID, wherein mapping includes full mapping scenarios, prefix mapping scenarios, Compound Mappings scene and can match
Set mapping scenarios.For prefix mapping scenarios, the data bit width of the User ID of source User ID/ mesh is by source IP address/destination IP
Address prefix address type and the address data bit width decision in addition to prefix；The User ID of source User ID/ mesh under other scenes
Data bit width is only determined by lower extension number of devices.In the following example of the embodiment of the present invention, lower extension number of devices is less than 256.
Wherein, full mapping scenarios are to be mapped using source IP address or purpose IP address with full matching way.For example, ginseng
It as shown in Figure 2, is the IPv6 five-tuple entry lookup application scenarios under full mapping scenarios mode, for the former IP five of up direction
Tuple, by searching for normalizing table, in normalizing table, the corresponding mapping result of source IP address FE80::10 is 1, therefore the new IP five constituted
In tuple, source IP address FE80::10 becomes source User ID 1, and other items remain unchanged, and in Fig. 2, and Flag indicates mark, Up
Indicate up direction.
Prefix mapping scenarios are to be mapped using the IP address prefix of source IP address or purpose IP address, will after mapping
Address outside mapping result and source IP address or purpose IP address prefix is spliced, and source User ID or purpose User can be obtained
ID.It is shown in Figure 3, it is the IPv4 five-tuple entry lookup application scenarios of prefix mapping scenarios, there are two kinds of situations, one is
IP address prefix can be mapped as 1bit numerical value, range 0-1, and the highest bit of the User ID as source User ID/ mesh；Separately
One is the addresses in addition to prefix 8bit, and the data bit width of the User ID of source User ID/ mesh is 9bit, can indicate 0-511.
For example, the IP address prefix of purpose IP address 192.168.1.2 is 192.168.1.0/24, the address outside prefix is 2, under
The former IP five-tuple of line direction, using the IP address lookup normalizing table of purpose IP address, in normalizing table, IP address prefix
192.168.1.0/24 corresponding mapping result is 0, therefore in the new IP five-tuple constituted, purpose IP address 192.168.1.2 becomes
It is 0 × 256+2=2 at purpose User ID, other items remain unchanged.For example, the IP address of purpose IP address 192.168.10.2
Prefix is 192.168.10.0/24, and the address outside prefix is 2, for the former IP five-tuple of down direction, uses purpose IP address
IP address lookup normalizing table, in normalizing table, the corresponding mapping result of IP address prefix 192.168.10.0/24 is 1, therefore
In the new IP five-tuple constituted, it is 1 × 256+2=258 that purpose IP address 192.168.10.2, which becomes purpose User ID, other
Item remains unchanged.In Fig. 3, Flag indicates mark, and Down indicates down direction.
Compound Mappings scene is to be mapped first using the IP address prefix of source IP address or purpose IP address, then will
The address obtained after mapping is spliced with the address outside the IP address prefix of source IP address or purpose IP address, uses splicing
Address is mapped.It is the IPv6 five-tuple entry lookup application scenarios under Compound Mappings scene for example, with reference to shown in Fig. 4, it is right
In the former IP five-tuple of up direction, the IP address prefix of source IP address is FE80::0/16, and the address outside IP address prefix is
3910::3 uses IP address lookup normalizing table, in normalizing table, the corresponding mapping of IP address prefix FE80::0/16 first
As a result it is 0, then splices the address 3910::3 outside the address obtained after mapping and IP address prefix, the address spliced
For { 0,3910::3 }, normalizing table then is searched using address { 0,3910::3 }, and in normalizing table, { 0,3910::3 } is corresponding to be reflected
Penetrating result is 0, therefore in new IP five-tuple, source User ID is 0, and other items remain unchanged.In Fig. 4, Flag indicates mark, Up table
Show up direction.
Configurable mapping scenarios are that the mapping mode for the mapping mode or Compound Mappings scene for selecting full mapping scenarios carries out
Mapping selects most suitable mapping scenarios that is, based on actual needs.Because prefix mapping scenarios are exactly Compound Mappings scene in fact
Particular form, prefix mapping scenarios compare with Compound Mappings scene, and prefix mapping scenarios have lacked a normalizing table search procedure,
And configurable mapping scenarios are primarily to realize more complicated mapping process, therefore do not include prefix in configurable mapping scenarios
Mapping scenarios.
A kind of lookup system of IP five-tuple list item provided in an embodiment of the present invention, comprising:
Mapping block is used to search normalizing table, and the source IP address of up direction is mapped as source User ID, downlink side
To purpose IP address mapping be purpose User ID；
Replacement module is used to the source IP address of up direction in former IP five-tuple replacing with source User ID, downlink side
To purpose IP address replacement be purpose User ID, constitute new IP five-tuple, and in new IP five-tuple addition for mark
The mark of down direction；
Searching module is used to carry out route table items lookup using new IP five-tuple.
Wherein, mapping block searches normalizing table, source IP address is mapped as source User ID, purpose IP address is mapped as mesh
User ID, detailed process are as follows: up direction using source IP address search normalizing table, source IP address is mapped as source User
ID, down direction search normalizing table using purpose IP address, and purpose IP address mapping is purpose User ID.
New IP five-tuple includes uplink IP five-tuple and downstream IP five-tuple；Uplink IP five-tuple includes mark, source User
ID, purpose IP address, protocol type, source port number and destination slogan；Downstream IP five-tuple includes mark, source IP address, mesh
User ID, protocol type, source port number and destination slogan.
Source IP address is mapped as source User ID by mapping block, and purpose IP address mapping is purpose User ID, wherein is reflected
It penetrates including full mapping scenarios, prefix mapping scenarios, Compound Mappings scene and configurable mapping scenarios.Full mapping scenarios are to use source
IP address or purpose IP address are mapped with full matching way；Prefix mapping scenarios are to use source IP address or purpose IP address
IP address prefix mapped；Compound Mappings scene be first using source IP address or purpose IP address IP address prefix into
Row mapping, then spells the address obtained after mapping and the address outside the IP address prefix of source IP address or purpose IP address
It connects, is mapped using the address of splicing；Configurable mapping scenarios are the mapping mode or Compound Mappings for selecting full mapping scenarios
The mapping mode of scene is mapped.
The lookup system of the IP five-tuple list item of the embodiment of the present invention, by way of searching normalizing table in advance, by source IP
Address of cache is source User ID, and purpose IP address mapping is purpose User ID, constitutes new IP five-tuple, shortens IP five-tuple
Length, to reduce list item resource required when IP five-tuple is searched significantly under the premise of guaranteeing routing forwarding performance.
The present invention be referring to according to the method for the embodiment of the present invention, the flow chart of equipment (system) and computer program product
And/or block diagram describes.It should be understood that each process in flowchart and/or the block diagram can be realized by computer program instructions
And/or the combination of the process and/or box in box and flowchart and/or the block diagram.It can provide these computer programs to refer to
Enable the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate
One machine so that by the instruction that the processor of computer or other programmable data processing devices executes generate for realizing
The device for the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of lookup method of IP five-tuple list item, which comprises the following steps:
Normalizing table is searched, the source IP address of up direction is mapped as source User ID, the purpose IP address of down direction is mapped as
Purpose User ID；
The source IP address of up direction in former IP five-tuple is replaced with into source User ID, the purpose IP address replacement of down direction
For purpose User ID, new IP five-tuple is constituted, and adds the mark for marking up-downlink direction in new IP five-tuple；
Route table items lookup is carried out using new IP five-tuple.
2. a kind of lookup method of IP five-tuple list item as described in claim 1, which is characterized in that the lookup normalizing table,
Source IP address is mapped as source User ID, purpose IP address mapping is purpose User ID, specific steps are as follows: up direction uses
Source IP address searches normalizing table, source IP address is mapped as source User ID, down direction searches normalizing using purpose IP address
Table, purpose IP address mapping are purpose User ID.
3. a kind of lookup method of IP five-tuple list item as claimed in claim 2, it is characterised in that:
The new IP five-tuple includes uplink IP five-tuple and downstream IP five-tuple；
The uplink IP five-tuple includes mark, source User ID, purpose IP address, protocol type, source port number and destination port
Number；
The downstream IP five-tuple includes mark, source IP address, purpose User ID, protocol type, source port number and destination port
Number.
4. a kind of lookup method of IP five-tuple list item as described in claim 1, which is characterized in that described to reflect source IP address
It penetrates as source User ID, purpose IP address mapping is purpose User ID, wherein mapping includes that full mapping scenarios, prefix map field
Scape, Compound Mappings scene and configurable mapping scenarios.
5. a kind of lookup method of IP five-tuple list item as claimed in claim 4, it is characterised in that:
The full mapping scenarios are to be mapped using source IP address or purpose IP address with full matching way；
The prefix mapping scenarios are to be mapped using the IP address prefix of source IP address or purpose IP address；
The Compound Mappings scene is to be mapped first using the IP address prefix of source IP address or purpose IP address, then will
The address obtained after mapping is spliced with the address outside the IP address prefix of source IP address or purpose IP address, uses splicing
Address is mapped；
The configurable mapping scenarios are that the mapping mode for the mapping mode or Compound Mappings scene for selecting full mapping scenarios carries out
Mapping.
6. a kind of lookup system of IP five-tuple list item characterized by comprising
Mapping block is used to search normalizing table, and the source IP address of up direction is mapped as source User ID, down direction
Purpose IP address mapping is purpose User ID；
Replacement module is used to the source IP address of up direction in former IP five-tuple replacing with source User ID, down direction
Purpose IP address replacement is purpose User ID, constitutes new IP five-tuple, and is added in new IP five-tuple for marking uplink and downlink
The mark in direction；
Searching module is used to carry out route table items lookup using new IP five-tuple.
7. a kind of lookup system of IP five-tuple list item as claimed in claim 6, which is characterized in that the mapping block is searched
Source IP address is mapped as source User ID by normalizing table, and purpose IP address mapping is purpose User ID, detailed process are as follows: uplink
Normalizing table is searched using source IP address in direction, source IP address is mapped as source User ID, down direction is looked into using purpose IP address
Normalizing table is looked for, purpose IP address mapping is purpose User ID.
8. a kind of lookup system of IP five-tuple list item as claimed in claim 7, which is characterized in that
The new IP five-tuple includes uplink IP five-tuple and downstream IP five-tuple；
The uplink IP five-tuple includes mark, source User ID, purpose IP address, protocol type, source port number and destination port
Number；
The downstream IP five-tuple includes mark, source IP address, purpose User ID, protocol type, source port number and destination port
Number.
9. a kind of lookup system of IP five-tuple list item as claimed in claim 6, which is characterized in that the mapping block is by source
IP address is mapped as source User ID, and purpose IP address mapping is purpose User ID, wherein mapping includes full mapping scenarios, preceding
Sew mapping scenarios, Compound Mappings scene and configurable mapping scenarios.
10. a kind of lookup system of IP five-tuple list item as claimed in claim 9, it is characterised in that:
The full mapping scenarios are to be mapped using source IP address or purpose IP address with full matching way；
The prefix mapping scenarios are to be mapped using the IP address prefix of source IP address or purpose IP address；
The Compound Mappings scene is to be mapped first using the IP address prefix of source IP address or purpose IP address, then will
The address obtained after mapping is spliced with the address outside the IP address prefix of source IP address or purpose IP address, uses splicing
Address is mapped；
The configurable mapping scenarios are that the mapping mode for the mapping mode or Compound Mappings scene for selecting full mapping scenarios carries out
Mapping.
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