CN108683635A - A kind of system and method for realizing the homologous chummage of IP fragmentation packet based on network processes chip - Google Patents
A kind of system and method for realizing the homologous chummage of IP fragmentation packet based on network processes chip Download PDFInfo
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- CN108683635A CN108683635A CN201810326924.9A CN201810326924A CN108683635A CN 108683635 A CN108683635 A CN 108683635A CN 201810326924 A CN201810326924 A CN 201810326924A CN 108683635 A CN108683635 A CN 108683635A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/166—IP fragmentation; TCP segmentation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1841—Resequencing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/31—Flow control; Congestion control by tagging of packets, e.g. using discard eligibility [DE] bits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/32—Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention provides a kind of system and method for realizing the homologous chummage of IP fragmentation packet based on network processes chip.Wherein, first device receives IP fragmentation packet, if normal fragment (first arrives first), records first burst information and forwarding behavior, the information that subsequent sheet is recorded according to first is forwarded to same secondary server with first；If out of order fragment (subsequent sheet arrives first), equipment caches subsequent sheet, and subsequent sheet is forwarded to same secondary server by first one subsequent sheet to extraction caching in time by original link sequence.According to this scheme, the IP fragmentation packet of same session will be forwarded to same secondary server, ensure that the homologous chummage of IP fragmentation packet.
Description
Technical field
The present invention relates to technical field of network security, and in particular to real based on network processes chip in primary network station equipment
The system of the homologous chummage of existing IP fragmentation packet.
Present invention simultaneously relates to realize the homologous chummage of IP fragmentation packet based on network processes chip in primary network station equipment
Method.
Background technology
In network link, if the IP packet of transmission has been more than maximum transmission unit (MTU), in order to adapt to different physics
The different MTU length of net need such message carrying out fragment.It concatenates network equipment connection between the routers, needs to it
Between the flow that transmits carry out after handling accordingly, be forwarded to secondary server.Primary network station equipment concatenates between the routers, will
Flow in network is forwarded to secondary server group and carries out data analysis, and secondary server group receives primary network station device forwards
Flow can carry out complete analyzing processing to the message of same session.In view of load balancing in network and routing are asymmetric
Situations such as, the fragment message that transmits in network link is there may be fragment is out of order and multilink situation, if first device is not
It is handled accordingly, the fragment message of same session can be forwarded to multiple secondary servers, cause secondary server can not
The Data Analysis Services of complete and accurate are carried out to the fragment message of same session.In order to ensure to carry out complete and accurate to IP fragmentation packet
Analyzing processing, need to solve how by more parts of IP fragmentation packets of same session be output to same secondary server carry out analysis make IP
The problem of fragment packets homologous chummage.
Therefore need a kind of new technical solution to solve the above problems.
Invention content
It is an object of the invention to：A kind of system for realizing the homologous chummage of IP fragmentation packet based on network processes chip is provided,
The homologous chummage of shunting to solve more parts of IP fragmentation packets how making same session in the case of packet out-ordering fragment is asked
Topic.
Present invention simultaneously provides a kind of methods for realizing the homologous chummage of IP fragmentation packet based on network processes chip, to solve
The problem of how making the shunting of more parts of IP fragmentation packets of same session homologous chummage in the case of packet out-ordering fragment.
In order to achieve the above objectives, the system for realizing the homologous chummage of IP fragmentation packet the present invention is based on network processes chip can be used
Following technical solution：
A kind of system that the homologous chummage of IP fragmentation packet is realized based on network processes chip, including：
Fragment study module, to extract the information for identifying same session fragment message, in same session fragment message
First consistent with the information of subsequent sheet；And include preset fragment table, by the study of first realization fragment table, fragment table is deposited
Store up key assignments and result mapping relations, key assignments be the same session fragment message of above-mentioned mark information, as a result headed by piece output
Action；
To cache subsequent sheet, and fragment cache memory table is arranged in fragment cache memory module, and the cache information of subsequent sheet is recorded
In fragment cache memory table；
Fragment extraction module passes through the same session the subsequent sheet arrived first to be cached after first arrival
The information searching fragment cache memory table of fragment message sequentially extracts follow-up in caching according to the buffer address of fragment cache memory table storage
Piece is forwarded to same equipment with first.
Advantageous effect：The present invention is by the information of same session fragment message come the fragment report of the same session of unique mark
Text carries out corresponding fragment study, fragment cache memory and fragment extraction, achievees the purpose that homologous chummage.
Further, the information of the same session fragment message be quaternary group information, including source IP, destination IP, agreement,
Fragment ID.
Further, normal fragment or out of order fragment are not differentiated between in fragment study module, first reaches i.e. study fragment
Table；Subsequent sheet reaches i.e. matching fragment table, and subsequent sheet walks same action with first, without fragment cache memory.
Further, the cache information in the fragment cache memory table includes that subsequent sheet quantity, buffer address and fragment are inclined
It moves.
It is provided by the invention it is a kind of based on network processes chip realize the homologous chummage of IP fragmentation packet method, may be used with
Lower technical solution, includes the following steps：
(1), extraction identifies the information of same session fragment message, first in same session fragment message and subsequent sheet
Information is consistent；And include preset fragment table, by the study of first realization fragment table, fragment table stores key assignments and result
Mapping relations, key assignments be the same session fragment message of above-mentioned mark information, as a result headed by piece output action；
(2), subsequent sheet is cached, and fragment cache memory table is set, the cache information of subsequent sheet is recorded in fragment cache memory table
In；
(3), the subsequent sheet arrived first is cached, passes through the information of the same session fragment message after first arrival
Fragment cache memory table is searched, the subsequent sheet in caching is sequentially extracted according to the buffer address of fragment cache memory table storage, is forwarded with first
To same equipment.
Advantageous effect：The present invention is by the information of same session fragment message come the fragment report of the same session of unique mark
Text carries out corresponding fragment study, fragment cache memory and fragment extraction, achievees the purpose that homologous chummage.
A kind of method for realizing the homologous chummage of IP fragmentation packet based on network processes chip provided by the invention, can also use
Following technical scheme includes the following steps：
Step S1：Link side IP fragmentation flow inputs level-one and concatenates the network equipment, and equipment carries out IP fragmentation packet parsing, sentences
Disconnected is first or subsequent sheet；
Step S2：IP fragmentation type is parsed according to step S1 equipment, piece headed by IP fragmentation carries out fragment table matching treatment,
Key assignments is quaternary group information, if matching fragment table, without fragment table learning；If not matching fragment table, learn fragment table；
Step S3：First lookup fragment cache memory table of IP fragmentation message, key assignments is quaternary group information；
Step S4：According to step S3 fragment cache memory table matching results, if fragment cache memory table does not match, first is exported；
Step S5：According to step S3 fragment cache memory table matching results, if fragment cache memory table matches, remembered according to fragment cache memory table
The cache information of record sequentially extracts the subsequent sheet of caching in time；
Step S6：Because step S5 will caching subsequent sheet extract, without recording the cache information of subsequent sheet, in time into
Marketing is ruined；
Step S7：The subsequent sheet extracted according to step S5 is forwarded to same two level with first by original link sequence and takes
Business device；
Step S8：IP fragmentation type is parsed according to step S1 equipment, IP fragmentation is subsequent sheet, matches fragment table, and key assignments is
Quaternary group information；
Step S9：It indicates first if matching according to step S8 fragment table matching results and has arrived, then walked with first same dynamic
It exports；
Step S10：According to step S8 fragment table matching results, if not matching, it is slow that equipment distributes buffer address progress fragment
Deposit processing；
Step S11：According to the processing of step S10 fragment cache memories, equipment need to record the cache information of subsequent sheet, ensure follow-up
It the successful extraction of piece and sequentially exports.
Advantageous effect：The present invention is by the information of same session fragment message come the fragment report of the same session of unique mark
Text carries out corresponding fragment study, fragment cache memory and fragment extraction, achievees the purpose that homologous chummage.
Further, in step S10, it is contemplated that some limitations existing for network equipment itself, such as memory capacity
Limitation makees some corresponding processing for IP fragmentation flow by flexibly configuring, configures fragment cache memory ageing time Tmax, point
Piece packet buffer capacity Nmax and same session message maximum fragment quantity Smax；
B1. under out of order fragment situation, subsequent sheet, which arrives first, to be cached, if being more than fragment cache memory capacity Nmax, equipment will after
Continuous piece abandons or sends back to original link；
If b2. first is not arrived, caching subsequent sheet caches always, in order to discharge spatial cache, to cache other sessions point
Piece message is arrived according to the ageing time Tmax mono- of device configuration, and equipment voluntarily extracts the subsequent sheet of caching in time, carry out abandon or
Send original link back to；
B3. the maximum fragment quantity Smax of flexible configuration same session fragment message caching, if more than Smax, equipment will after
Continuous piece abandons or sends back to original link；
B4. since there are retransmission mechanism, equipment, and the same session of re-transmission to be deviated identical subsequent sheet and is not cached in network,
Send original link back to.
Description of the drawings
Fig. 1 is the process chart that the homologous chummage of IP fragmentation packet is realized based on network processes chip of the present invention.
Specific implementation mode
Embodiment one
The present embodiment provides a kind of systems for realizing the homologous chummage of IP fragmentation packet based on network processes chip, including：
Fragment study module, to extract the information for identifying same session fragment message, in same session fragment message
First consistent with the information of subsequent sheet；And include preset fragment table, by the study of first realization fragment table, fragment table is deposited
Store up key assignments and result mapping relations, key assignments be the same session fragment message of above-mentioned mark information, as a result headed by piece output
Action.In this embodiment, the information of the same session fragment message is quaternary group information, including source IP, destination IP, association
View, fragment ID can also equally select the information of other first can be denoted as in same session fragment message and subsequent sheet,
The fragment of the same session of the information extraction can be passed through in a subsequent step.Also, in the fragment study module not
Normal fragment or out of order fragment are distinguished, first reaches i.e. study fragment table；Subsequent sheet reaches i.e. matching fragment table, and subsequent sheet
Same action is walked with first, without fragment cache memory.
To cache subsequent sheet, and fragment cache memory table is arranged in fragment cache memory module, and the cache information of subsequent sheet is recorded
In fragment cache memory table.Cache information in the fragment cache memory table includes that subsequent sheet quantity, buffer address and fragment are inclined
It moves.
Fragment extraction module passes through the same session the subsequent sheet arrived first to be cached after first arrival
The information searching fragment cache memory table of fragment message sequentially extracts follow-up in caching according to the buffer address of fragment cache memory table storage
Piece is forwarded to same equipment with first.
Embodiment two
Corresponding above-described embodiment one, the present invention also provides one kind realizing the homologous chummage of IP fragmentation packet based on network processes chip
Method, include the following steps：
(1), extraction identifies the information of same session fragment message, first in same session fragment message and subsequent sheet
Information is consistent；And include preset fragment table, by the study of first realization fragment table, fragment table stores key assignments and result
Mapping relations, key assignments be the same session fragment message of above-mentioned mark information, as a result headed by piece output action.It is described with for a moment
The information for talking about fragment message is quaternary group information, including source IP, destination IP, agreement, fragment ID.Likewise, it can also be selected
He can be denoted as the information of first and subsequent sheet in same session fragment message, that can pass through in a subsequent step
The fragment of the same session of the information extraction.
(2), subsequent sheet is cached, and fragment cache memory table is set, the cache information of subsequent sheet is recorded in fragment cache memory table
In.Cache information in the fragment cache memory table includes subsequent sheet quantity, buffer address and fragment offset.
(3), the subsequent sheet arrived first is cached, passes through the information of the same session fragment message after first arrival
Fragment cache memory table is searched, the subsequent sheet in caching is sequentially extracted according to the buffer address of fragment cache memory table storage, is forwarded with first
To same equipment.
Embodiment three
Shown in Fig. 1, one kind to be provided in the present embodiment is based on network processes chip and realizes that IP fragmentation packet is homologous
The method of chummage, includes the following steps：
Step S1：Link side IP fragmentation flow inputs level-one and concatenates the network equipment, and equipment carries out IP fragmentation packet parsing, sentences
Disconnected is first or subsequent sheet；
Step S2：IP fragmentation type is parsed according to step S1 equipment, piece headed by IP fragmentation carries out fragment table matching treatment,
Key assignments is four-tuple (source IP, destination IP, agreement, fragment ID) information, if matching fragment table, without fragment table learning；If not
Fragment table is matched, then learns fragment table；
Step S3：First of IP fragmentation message lookup fragment cache memory table, key assignments be four-tuple (source IP, destination IP, agreement,
Fragment ID) information；
Step S4：According to step S3 fragment cache memory table matching results, if fragment cache memory table does not match, first is exported；
Step S5：According to step S3 fragment cache memory table matching results, if fragment cache memory table matches, remembered according to fragment cache memory table
The cache information of record sequentially extracts the subsequent sheet of caching in time；
Step S6：Because step S5 will caching subsequent sheet extract, without recording the cache information of subsequent sheet, in time into
Marketing is ruined；
Step S7：The subsequent sheet extracted according to step S5 is forwarded to same two level with first by original link sequence and takes
Business device；
Step S8：IP fragmentation type is parsed according to step S1 equipment, IP fragmentation is subsequent sheet, matches fragment table, and key assignments is
Four-tuple (source IP, destination IP, agreement, fragment ID) information；
Step S9：It indicates first if matching according to step S8 fragment table matching results and has arrived, then walked with first same dynamic
It exports；
Step S10：According to step S8 fragment table matching results, if not matching, it is slow that equipment distributes buffer address progress fragment
Deposit processing；In view of the limitation of some limitations existing for network equipment itself, such as memory capacity, by flexibly configuring pair
In IP fragmentation flow make some it is corresponding handle, configuration fragment cache memory ageing time Tmax, fragment message buffer memory capacity Nmax with
And same session message maximum fragment quantity Smax；
B1. under out of order fragment situation, subsequent sheet, which arrives first, to be cached, if being more than fragment cache memory capacity Nmax, equipment will after
Continuous piece abandons or sends back to original link；
If b2. first is not arrived, caching subsequent sheet caches always, in order to discharge spatial cache, to cache other sessions point
Piece message is arrived according to the ageing time Tmax mono- of device configuration, and equipment voluntarily extracts the subsequent sheet of caching in time, carry out abandon or
Send original link back to；
B3. the maximum fragment quantity Smax of flexible configuration same session fragment message caching, if more than Smax, equipment will after
Continuous piece abandons or sends back to original link；
B4. since there are retransmission mechanism, equipment, and the same session of re-transmission to be deviated identical subsequent sheet and is not cached in network,
Send original link back to；
Step S11：According to the processing of step S10 fragment cache memories, equipment need to record the cache information of subsequent sheet, ensure follow-up
It the successful extraction of piece and sequentially exports.
Claims (10)
1. a kind of system for realizing the homologous chummage of IP fragmentation packet based on network processes chip, which is characterized in that including：
Fragment study module, to extract the information for identifying same session fragment message, first in same session fragment message
It is consistent with the information of subsequent sheet；And include preset fragment table, by the study of first realization fragment table, fragment table stores key
Value and the mapping relations of result, key assignments are the information of the same session fragment message of above-mentioned mark, as a result headed by piece output action；
To cache subsequent sheet, and fragment cache memory table is arranged in fragment cache memory module, and the cache information of subsequent sheet is recorded in point
In piece cache table；
Fragment extraction module passes through the same session fragment the subsequent sheet arrived first to be cached after first arrival
The information searching fragment cache memory table of message sequentially extracts the subsequent sheet in caching according to the buffer address of fragment cache memory table storage,
It is forwarded to same equipment with first.
2. system according to claim 1, it is characterised in that：The information of the same session fragment message is believed for four-tuple
Breath, including source IP, destination IP, agreement, fragment ID.
3. system according to claim 1 or 2, it is characterised in that：Normal fragment is not differentiated between in fragment study module still
Out of order fragment, first reaches i.e. study fragment table；Subsequent sheet reaches i.e. matching fragment table, and subsequent sheet walks identical move with first
Make, without fragment cache memory.
4. system according to claim 3, it is characterised in that：In fragment cache memory module, in the fragment cache memory table
Cache information includes subsequent sheet quantity, buffer address and fragment offset.
5. a kind of method for realizing the homologous chummage of IP fragmentation packet based on network processes chip, which is characterized in that include the following steps：
(1), extraction identifies the information of same session fragment message, the information of first in same session fragment message and subsequent sheet
Unanimously；And include preset fragment table, by the study of first realization fragment table, fragment table stores the mapping of key assignments and result
Relationship, key assignments be the same session fragment message of above-mentioned mark information, as a result headed by piece output action；
(2), subsequent sheet is cached, and fragment cache memory table is set, the cache information of subsequent sheet is recorded in fragment cache memory table；
(3), the subsequent sheet arrived first is cached, passes through the information searching of the same session fragment message after first arrival
Fragment cache memory table sequentially extracts the subsequent sheet in caching according to the buffer address of fragment cache memory table storage, is forwarded to first same
One equipment.
6. according to the method described in claim 5, it is characterized in that：The information of the same session fragment message is believed for four-tuple
Breath, including source IP, destination IP, agreement, fragment ID.
7. method according to claim 5 or 6, it is characterised in that：Normal fragment is not differentiated between in fragment study module still
Out of order fragment, first reaches i.e. study fragment table；Subsequent sheet reaches i.e. matching fragment table, and subsequent sheet walks identical move with first
Make, without fragment cache memory.
8. according to the method described in claim 7, it is characterized in that：In step (2), the cache information in the fragment cache memory table
It is deviated including subsequent sheet quantity, buffer address and fragment.
9. a kind of method for realizing the homologous chummage of IP fragmentation packet based on network processes chip, which is characterized in that include the following steps：
Step S1：Link side IP fragmentation flow inputs level-one and concatenates the network equipment, and equipment carries out IP fragmentation packet parsing, and judgement is
First or subsequent sheet；
Step S2：IP fragmentation type is parsed according to step S1 equipment, piece headed by IP fragmentation carries out fragment table matching treatment, key assignments
For quaternary group information, if matching fragment table, without fragment table learning；If not matching fragment table, learn fragment table；
Step S3：First lookup fragment cache memory table of IP fragmentation message, key assignments is quaternary group information；
Step S4：According to step S3 fragment cache memory table matching results, if fragment cache memory table does not match, first is exported；
Step S5：According to step S3 fragment cache memory table matching results, if fragment cache memory table matches, according to fragment cache memory table record
Cache information sequentially extracts the subsequent sheet of caching in time；
Step S6：Because step S5 extracts caching subsequent sheet, without recording the cache information of subsequent sheet, in time into marketing
It ruins；
Step S7：The subsequent sheet extracted according to step S5 is forwarded to same secondary service by original link sequence with first
Device；
Step S8：IP fragmentation type is parsed according to step S1 equipment, IP fragmentation is subsequent sheet, matches fragment table, key assignments is quaternary
Group information；
Step S9：It indicates first if matching according to step S8 fragment table matching results and has arrived, then it is defeated to walk same action with first
Go out；
Step S10：According to step S8 fragment table matching results, if not matching, equipment is distributed buffer address and is carried out at fragment cache memory
Reason；
Step S11：According to the processing of step S10 fragment cache memories, equipment need to record the cache information of subsequent sheet, ensure subsequent sheet
Success is extracted and is sequentially exported.
10. according to the method described in claim 9, it is characterized in that：In step S10, fragment cache memory ageing time Tmax is configured,
Fragment message buffer memory capacity Nmax and same session message maximum fragment quantity Smax；
B1. under out of order fragment situation, subsequent sheet, which arrives first, to be cached, if being more than fragment cache memory capacity Nmax, equipment is by subsequent sheet
Abandon or send back to original link；
If b2. first is not arrived, caching subsequent sheet caches always, in order to discharge spatial cache, to cache other session fragment reports
Text is arrived according to the ageing time Tmax mono- of device configuration, and equipment voluntarily extracts the subsequent sheet of caching in time, is abandoned or is sent back to
Original link；
B3. the maximum fragment quantity Smax of flexible configuration same session fragment message caching, if more than Smax, equipment is by subsequent sheet
Abandon or send back to original link；
B4. since there are retransmission mechanism, equipment, and the same session of re-transmission to be deviated identical subsequent sheet and is not cached, is sent back in network
Original link.
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| CN110401513A (en) * | 2019-08-02 | 2019-11-01 | 视联动力信息技术股份有限公司 | A kind of data transmission method and device |
| CN110401513B (en) * | 2019-08-02 | 2021-12-17 | 视联动力信息技术股份有限公司 | Data transmission method and device |
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| CN111885198B (en) * | 2020-07-31 | 2023-07-11 | 北京捷通华声科技股份有限公司 | Message processing method, system and device and electronic setting |
| CN115134284A (en) * | 2021-03-24 | 2022-09-30 | 中国电信股份有限公司 | Method, device and medium for realizing homologous and homoclinic shunting through multiple shunts |
| CN115134284B (en) * | 2021-03-24 | 2023-07-14 | 中国电信股份有限公司 | Method, device and medium for realizing homologous and dormitory flow division through multiple flow dividers |
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