CN110138505A - A kind of the CRC calculation method and system of heterogeneous protocol conversion - Google Patents
A kind of the CRC calculation method and system of heterogeneous protocol conversion Download PDFInfo
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- CN110138505A CN110138505A CN201910247526.2A CN201910247526A CN110138505A CN 110138505 A CN110138505 A CN 110138505A CN 201910247526 A CN201910247526 A CN 201910247526A CN 110138505 A CN110138505 A CN 110138505A
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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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
- H04L69/08—Protocols for interworking; Protocol conversion
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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
- H04L69/22—Parsing or analysis of headers
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Abstract
The present invention provides the CRC calculation methods and system of a kind of conversion of heterogeneous protocol, are related to the technical field of data processing, comprising: obtain initial protocol data packet to be converted；Operation is decoded to initial protocol data packet to be converted, verifies whether initial protocol data packet to be converted transmits correctly based on decoding result；If initial protocol data packet transmission to be converted is correct, then it is based on target protocol conversion requirements, modification operation is executed to the header data in initial protocol data packet to be converted, obtain intermediate protocol data packet to be converted, wherein, modification operation comprises at least one of the following: increasing data manipulation, deletes data manipulation, replacement data operation；The CRC check value of intermediate protocol data packet to be converted is calculated, and CRC check value is updated in intermediate protocol data packet to be converted, obtains target protocol data packet to be converted.It solves in the prior art when the CRC coding for carrying out heterogeneous protocol conversion calculates, the consuming time is longer, the lower technical problem of heterogeneous protocol transfer efficiency.
Description
Technical field
The present invention relates to technical field of data processing, CRC calculation method more particularly, to a kind of conversion of heterogeneous protocol and
System.
Background technique
Multiple network agreement is generally involved in heterogeneous protocol conversion, such as Ethernet protocol, FC agreement (Fiber
Channel, optical-fibre channel), RapidIO agreement etc., in protocol conversion process, may relate to the conversion between several agreements,
RapidIO agreement is such as converted to by Ethernet protocol, data frame format bit field reflects between this relates to how to complete different agreement
Penetrate, it is necessary to the data informations such as the packet header of the data packet received are increased, are deleted, change operation, with complete packaging and
It unpacks.Cyclic redundancy check method is used in across heterogeneous protocol exchange system to ensure the correctness of data in transmission process.
CRC(Cyclic Redundancy Code, cyclic redundancy check code) use polynomial code, such as common CRC-16, CRC-
32 equal decoding methods.Currently, serial mode is difficult to handle in real time for high- speed network communication, therefore CRC codec is adopted more
With parallel implementation method.
In across heterogeneous protocol exchange system, general way is to be required after receiving end receives data packet according to exchange,
A new data packet is generated after increasing, deleting or changing the information such as some packet header, transmitting terminal is then transmitted to by exchange,
The new data packet received is re-started CRC coding and calculated by transmitting terminal, is then sent to corresponding switching equipment or end
End equipment.Thus there is a kind of situation, i.e., needs the CRC coding carried out to data packet again to calculate in transmitting terminal, as FC is assisted
The data frame payload length of view is up to 2096 bytes, if all carrying out CRC again to these data frames encodes meter
It calculates, longer time will be expended, delay is also larger, to increase the cost of system, reduces the effect of exchange system transmission
Rate.
In view of the above-mentioned problems, not putting forward effective solutions also.
Summary of the invention
In view of this, the purpose of the present invention is to provide the CRC calculation method and system of a kind of conversion of heterogeneous protocol, with slow
It has solved in the prior art when the CRC coding for carrying out heterogeneous protocol conversion calculates, the consuming time is longer, heterogeneous protocol transfer efficiency
Lower technical problem.
In a first aspect, the embodiment of the invention provides a kind of CRC calculation methods of heterogeneous protocol conversion, this method comprises:
Obtain initial protocol data packet to be converted；Operation is decoded to the initial protocol data packet to be converted, is based on decoding result
Verify whether the initial protocol data packet to be converted transmits correctly；If the initial protocol data packet transmission to be converted is correct,
Target protocol conversion requirements are then based on, modification operation is executed to the header data in the initial protocol data packet to be converted, is obtained
To intermediate protocol data packet to be converted, wherein the modification operation comprises at least one of the following: increasing data manipulation, deletes number
According to operation, replacement data operation；The CRC check value of intermediate protocol data packet to be converted is calculated, and the CRC check value is updated
To in the protocol data packet to be converted of the centre, target protocol data packet to be converted is obtained.
Further, if modification operation is increase data manipulation or deletion data operation；The centre is calculated wait turn
The CRC check value of protocol data packet is changed, and the CRC check value is updated in the protocol data packet to be converted of the centre, is obtained
It include: to obtain and the modification operation is executed to the header data based on CRC generating principle to target protocol data packet to be converted
When, the first data information of generation；Calculate the CRC check value of first data information；By the CRC of first data information
Check value is updated in the protocol data packet to be converted of the centre, obtains target protocol data packet to be converted.
Further, if modification operation is that replacement data operates；It is correct to transmitting based on target protocol conversion requirements
The protocol data packet to be converted in header data execute modification operation, obtaining intermediate protocol data packet to be converted includes:
Based on the target protocol conversion requirements, the header data is deleted；It is correctly initial that target data is added to the transmission
In protocol data packet to be converted, target protocol data packet to be converted is obtained, wherein the target data is for replacing the packet
The data of head data.
Further, if modification operation is that replacement data operates；The CRC check value of the header data is calculated, and
The CRC check value is updated in the protocol data packet to be converted of the centre, obtaining target protocol data packet to be converted includes:
Based on CRC generating principle, when obtaining the deletion header data, the second data information of generation, and obtain and increase the mesh
When marking data, the third data information of generation；Calculate second data information CRC check value and the third data information
CRC check value；
The CRC check value of the CRC check value of second data information and the third data information is updated to the centre
In protocol data packet to be converted, target protocol data packet to be converted is obtained.Further, the method also includes: by the mesh
It marks protocol data packet to be converted and is sent to target device, wherein the target device includes: switching equipment, terminal device.
Second aspect, the embodiment of the invention provides a kind of CRC computing system of heterogeneous protocol conversion, which includes:
Data sink, CRC decoder, protocol converter and CRC calculate equipment, wherein the data sink is for obtaining wait turn
Change protocol data packet；The CRC decoder is based on decoding result for being decoded operation to the protocol data packet to be converted
Verify whether the protocol data packet to be converted transmits correctly；If the protocol converter is for the initial agreement number to be converted
It is correct according to packet transmission, then target protocol conversion requirements are based on, the header data in the initial protocol data packet to be converted is held
Row modification operation, obtains intermediate protocol data packet to be converted, wherein the modification operation comprises at least one of the following: increasing number
According to operation, data manipulation, replacement data operation are deleted；The CRC calculates equipment for calculating intermediate protocol data packet to be converted
CRC check value, and the CRC check value is updated in the protocol data packet to be converted of the centre, it is to be converted to obtain target
Protocol data packet.
Further, the CRC calculates equipment and is used to operate in the modification to increase data manipulation or deleting data behaviour
In the case where work, it is based on CRC generating principle, when obtaining to header data execution modification operation, the first number of generation
It is believed that breath；Calculate the CRC check value of first data information；By the CRC check value of first data information, it is updated to institute
It states in intermediate protocol data packet to be converted, obtains target protocol data packet to be converted.
Further, the protocol converter is used to be based in the case where modification operation is replacement data operation
The target protocol conversion requirements, delete the header data；Target data is added to the transmission correctly initially wait turn
It changes in protocol data packet, obtains target protocol data packet to be converted, wherein the target data is for replacing the packet header number
According to data.
Further, the CRC calculates equipment and is used to be based in the case where modification operation is replacement data operation
CRC generating principle, when obtaining the deletion header data, the second data information of generation, and obtain and increase the number of targets
According to when, the third data information of generation；By the CRC of the CRC check value of second data information and the third data information
Check value is updated in the protocol data packet to be converted of the centre, obtains target protocol data packet to be converted.
Further, the system also includes: target protocol data packet to be converted is sent to target and set by transmitter
It is standby, wherein the target device includes: switching equipment, terminal device.
In embodiments of the present invention, initial protocol data packet to be converted is obtained；Initial protocol data packet to be converted is carried out
Decoding operate verifies whether initial protocol data packet to be converted transmits correctly based on decoding result；If initial agreement number to be converted
It is correct according to packet transmission, then target protocol conversion requirements are based on, the header data execution in initial protocol data packet to be converted is repaired
Change operation, obtain intermediate protocol data packet to be converted, wherein modification operation comprises at least one of the following: increasing data manipulation, deletes
Subtract data manipulation, replacement data operation；The CRC check value of intermediate protocol data packet to be converted is calculated, and CRC check value is updated
Into intermediate protocol data packet to be converted, target protocol data packet to be converted is obtained.
In the present embodiment, when the CRC for carrying out heterogeneous protocol conversion is encoded and calculated, by calculating intermediate agreement number to be converted
It is updated in intermediate protocol data packet to be converted according to the CRC check value of packet, and by CRC check value, obtains target agreement to be converted
The mode of data packet, reached carry out heterogeneous protocol conversion CRC coding calculate only need to the header data modified into
Row CRC coding calculate can complete heterogeneous protocol conversion CRC coding calculate purpose, and then solve in the prior art into
When the CRC of row heterogeneous protocol conversion encodes calculating, the consuming time is longer, the lower technical problem of heterogeneous protocol transfer efficiency, from
And realize the efficiency techniques effect for improving heterogeneous protocol conversion.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow chart of the CRC calculation method of heterogeneous protocol conversion provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the CRC calculation method of another heterogeneous protocol conversion provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of the CRC computing system of heterogeneous protocol conversion provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of the CRC computing system of another heterogeneous protocol conversion provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment one:
According to embodiments of the present invention, a kind of embodiment of the CRC calculation method of heterogeneous protocol conversion is provided, needs to illustrate
It is that step shown in the flowchart of the accompanying drawings can execute in a computer system such as a set of computer executable instructions,
Also, although logical order is shown in flow charts, and it in some cases, can be to be different from sequence execution herein
Shown or described step.
Fig. 1 is a kind of flow chart of the CRC calculation method of heterogeneous protocol conversion according to an embodiment of the present invention, such as Fig. 1 institute
Show, this method comprises the following steps:
Step S102 obtains initial protocol data packet to be converted；
Step S104 is decoded operation to the initial protocol data packet to be converted, described initial based on decoding result verifying
Whether protocol data packet to be converted transmits correctly；
Step S106 is based on target protocol conversion requirements, to described if the initial protocol data packet transmission to be converted is correct
Header data in initial protocol data packet to be converted executes modification operation, obtains intermediate protocol data packet to be converted, wherein institute
It states modification operation to comprise at least one of the following: increasing data manipulation, delete data manipulation, replacement data operation；
Step S108 calculates the CRC check value of intermediate protocol data packet to be converted, and the CRC check value is updated to described
In intermediate protocol data packet to be converted, target protocol data packet to be converted is obtained.
In the present invention, when the CRC for carrying out heterogeneous protocol conversion is encoded and calculated, by calculating intermediate protocol data to be converted
The CRC check value of packet, and CRC check value is updated in intermediate protocol data packet to be converted, obtain target agreement number to be converted
According to the mode of packet, reaches and only needed to carry out the header data modified in the CRC coding calculating for carrying out heterogeneous protocol conversion
CRC encodes the purpose calculated, and then solves the consuming in the prior art when the CRC coding for carrying out heterogeneous protocol conversion calculates
Time is longer, the lower technical problem of heterogeneous protocol transfer efficiency, to realize the efficiency skill for improving heterogeneous protocol conversion
Art effect.
It should be noted that the centre of step S106 protocol data packet to be converted, due to not carrying out CRC check value more
Newly, therefore the school CRC of the CRC check value of the centre of step S106 protocol data packet to be converted and initial protocol data packet to be converted
It is identical to test value.
It should be noted that due to generally involving multiple network agreement in heterogeneous protocol conversion, such as Ethernet protocol, FC
Agreement (Fiber Channel, optical-fibre channel), RapidIO agreement etc., in protocol conversion process, may relate to several agreements
Between conversion, RapidIO agreement is such as converted to by Ethernet protocol, this relates to how to complete data frame between different agreement
Form bit domain mapping, it is necessary to the data informations such as the packet header of the data packet received be increased, deleted, replacement operation.
In addition, it should also be noted that, cyclic redundancy check side can be used during carrying out heterogeneous protocol conversion
Method is to ensure the correctness of data in transmission process.CRC(Cyclic Redundancy Code, cyclic redundancy check code) it uses
Polynomial code, such as common CRC-16, CRC-32 decoding method.
Above-mentioned header data is related with protocol type, its packet header content of different agreements is also different.Heterogeneous protocol turns
The implementation changed is exactly to split the frame of agreement, and the partial informations such as packet header are mapped to the relevant information of another protocol frame,
It needs to carry out mapping conversion to address, the priority etc. in agreement packet header, data load will not change.Specific data
Packet is as follows by protocal analysis.
The typical packet format such as Nwrite packet of RapidIO agreement, wherein Data data are data load；AckID is used to only
The identifier of the confirmation command character number of one ground mark packet；Prio instruction is used for the packet priority of flow control；Tt field determines mesh
ID and source ID length and position；Ftype determines the type of packet；Transaction indicates transaction types；
Destination ID indicates purpose ID；Source ID indicates source ID；When carrying out protocol conversion, resolution logic layer is not needed
In part field.Therefore, for RapidIO agreement, its header packet information mainly includes purpose ID and source ID and priority etc.
Physical layer and transport layer data.
Ethernet packet header data include destination address, source address, VLAN stem etc.；Wherein IP Bao Zhongwei X protocol data packet,
X protocol stem includes X protocol mark, X protocol length, X protocol offset, X protocol priority, X protocol source port number, X protocol again
Destination slogan.
FC agreement packet header data packet is containing SOF mark frame starting, FC frame head, ASM head, EOF frame end mark.FC frame head wraps again
The type of frame containing R_CTL, Type protocol type, Destination Address destination address, Source Address source address,
Frame Control frame control field, the sequence ID number that the SEQ_ID frame is subordinate to.
In embodiments of the present invention, if modification operation is increase data manipulation or deletion data operation, step S106
Further include following steps:
Step S11 is based on CRC generating principle, when obtaining to header data execution modification operation, the first number of generation
It is believed that breath；
Step S12 calculates the CRC check value of first data information；
The CRC check value of first data information is updated in the protocol data packet to be converted of the centre, is obtained by step S13
To target protocol data packet to be converted.
In embodiments of the present invention, if modification operation generates to increase data manipulation or deletion data operation according to CRC
Principle obtains the first data information for increasing or deleting header data；
Then, it calculates the first data information CRC check value.
Finally, the first data information CRC check value is updated in intermediate protocol data packet to be converted, obtains target and wait turning
Change protocol data packet.
By the way that the first data information CRC check value to be updated in intermediate protocol data packet to be converted, obtains target and wait turning
The mode of protocol data packet is changed, is only needed when the CRC coding for carrying out heterogeneous protocol conversion calculates to being modified to reach
Packet content carry out CRC coding and calculate that the purpose that the CRC of heterogeneous protocol conversion is calculated can be completed, and then solve existing
In technology when the CRC for carrying out heterogeneous protocol conversion is encoded and calculated, the consuming time is longer, the lower skill of heterogeneous protocol transfer efficiency
Art problem.
It should be noted that the first above-mentioned data information includes PACKET_ADD and PACKET_DEL.
What PACKET_ADD was indicated is after receiving protocol data packet to be converted, to be required according to protocol conversion, to data packet
Content needs to increase some data informations, to be mapped to new agreement, meets the requirement of new agreement.To discuss below conveniently, just
These data informations newly increased are defined as PACKET_ADD.As NWrite packet is needed to FC protocol conversion in SRIO agreement
8 data for increasing a R_CTL frame type, are denoted as PACKET_ADD.
Similarly, what PACKET_DEL was indicated is after receiving protocol data packet to be converted, to be required according to protocol conversion, logarithm
It needs to delete some data informations according to packet content, to be mapped to new agreement, meets the requirement of new agreement.
In embodiments of the present invention, if modification operation is that replacement data operates, step S104 further includes following steps:
Step S21 is based on the target protocol conversion requirements, deletes the header data；
The target data is added in the correct initial protocol data packet to be converted of the transmission, obtains target by step S22
Protocol data packet to be converted, wherein the target data is the data for replacing the header data.
In embodiments of the present invention, header data is first deleted then above-mentioned replacement data can be operated to be considered as, it is rear to increase
The operation of data, detailed process is as follows:
When modifying to initiation protocol change data packet, first has to delete header data, then will be used to replace packet header number
According to target data be added in initial protocol data packet to be converted, to complete to repair initial protocol data packet to be converted
Change, obtains intermediate protocol data packet to be converted.
In embodiments of the present invention, if modification operation is that replacement data operates, step S106 further includes following steps:
Step S31 is based on CRC generating principle, when obtaining the deletion header data, the second data information of generation, and obtain
When taking the increase target data, the third data information of generation；
Step S32 calculates the CRC check value of second data information and the CRC check value of the third data information；
The CRC check value of the CRC check value of second data information and the third data information is updated to by step S33
In the centre protocol data packet to be converted, target protocol data packet to be converted is obtained.
In embodiments of the present invention, if modification operation is that replacement data operates, it is based on CRC generating principle, is obtained respectively
The second data information that header data generates is deleted, and obtains and increases the third data information that target data generates.
Then, the CRC check value of the second data information and the CRC check value of third data information are calculated.
Finally, the CRC check value of the CRC check value of the second data information and third data information is updated to intermediate wait turn
It changes in protocol data packet, obtains target protocol data packet to be converted, to complete the isomery association of initial protocol data packet to be converted
View conversion.
In embodiments of the present invention, as shown in Fig. 2, this method further includes following steps:
Target protocol data packet to be converted is sent to target device by step S110, wherein the target device includes:
Switching equipment, terminal device.
After obtaining target protocol data packet to be converted, target protocol data packet to be converted is sent to switching equipment or end
End equipment, so that switching equipment or terminal device perform corresponding processing target protocol data packet to be converted.
Embodiment two:
The present invention also provides a kind of CRC computing system of heterogeneous protocol conversion, the system is for executing the embodiment of the present invention
The CRC calculation method for stating the conversion of heterogeneous protocol provided by content is heterogeneous protocol conversion provided in an embodiment of the present invention below
CRC computing system specific introduction.
As shown in figure 3, Fig. 3 is the schematic diagram for the CRC computing system that above-mentioned heterogeneous protocol is converted, which includes: number
According to receiver 10, CRC decoder 20, protocol converter 30 and CRC calculate equipment 40, wherein
The data sink 10 is for obtaining initial protocol data packet to be converted；
The CRC decoder 20 is used to be decoded operation to the initial protocol data packet to be converted, is tested based on decoding result
Demonstrate,prove whether the initial protocol data packet to be converted transmits correctly；
If the protocol converter 30 is correct for the initial protocol data packet transmission to be converted, converted based on target protocol
It is required that executing modification operation to the header data in the initial protocol data packet to be converted, intermediate agreement number to be converted is obtained
According to packet, wherein the modification operation comprises at least one of the following: increasing data manipulation, delete data manipulation, replacement data behaviour
Make；
The CRC calculates the CRC check value that equipment 40 is used to calculate intermediate protocol data packet to be converted, and by the CRC check
Value is updated in the protocol data packet to be converted of the centre, obtains target protocol data packet to be converted.
In the present embodiment, when the CRC for carrying out heterogeneous protocol conversion is encoded and calculated, by calculating intermediate agreement number to be converted
It is updated in intermediate protocol data packet to be converted according to the CRC check value of packet, and by CRC check value, obtains target agreement to be converted
The mode of data packet, reached carry out heterogeneous protocol conversion CRC coding calculate only need to the header data modified into
Row CRC coding calculates the purpose that the CRC for the heterogeneous protocol conversion that can be completed is calculated, and then solves and carrying out in the prior art
When the CRC of heterogeneous protocol conversion encodes calculating, the consuming time is longer, the lower technical problem of heterogeneous protocol transfer efficiency, thus
Realize the efficiency techniques effect for improving heterogeneous protocol conversion.
Preferably, the CRC calculates equipment and is used in modification operation be increase data manipulation or deletion data operation
In the case where, it is based on CRC generating principle, when obtaining to header data execution modification operation, the first data of generation
Information；Calculate the CRC check value of first data information；By the CRC check value of first data information, it is updated to described
In intermediate protocol data packet to be converted, target protocol data packet to be converted is obtained.
Preferably, the protocol converter is used to be based on institute in the case where modification operation is replacement data operation
Target protocol conversion requirements are stated, the header data is deleted；It is correctly initial to be converted that target data is added to the transmission
In protocol data packet, target protocol data packet to be converted is obtained, wherein the target data is for replacing the header data
Data.
Preferably, the CRC calculates equipment and is used to be based in the case where modification operation is replacement data operation
CRC generating principle, when obtaining the deletion header data, the second data information of generation, and obtain and increase the number of targets
According to when, the third data information of generation；By the CRC of the CRC check value of second data information and the third data information
Check value is updated in the protocol data packet to be converted of the centre, obtains target protocol data packet to be converted.
Preferably, as shown in figure 4, the system also includes transmitter, for by target protocol data packet to be converted
It is sent to target device, wherein the target device includes: switching equipment, terminal device.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the unit,
Only a kind of logical function partition, there may be another division manner in actual implementation, in another example, multiple units or components can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be through some communication interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in the executable non-volatile computer-readable storage medium of a processor.Based on this understanding, of the invention
Technical solution substantially the part of the part that contributes to existing technology or the technical solution can be with software in other words
The form of product embodies, which is stored in a storage medium, including some instructions use so that
One computer equipment (can be personal computer, server or the network equipment etc.) executes each embodiment institute of the present invention
State all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can be with
Store the medium of program code.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of CRC calculation method of heterogeneous protocol conversion characterized by comprising
Obtain initial protocol data packet to be converted；
Operation is decoded to the initial protocol data packet to be converted, based on the decoding result verifying initial agreement to be converted
Whether data packet is transmitted correctly；
If the initial protocol data packet transmission to be converted is correct, target protocol conversion requirements are based on, to described initially wait turn
The header data changed in protocol data packet executes modification operation, obtains intermediate protocol data packet to be converted, wherein the modification behaviour
It comprises at least one of the following: increasing data manipulation, delete data manipulation, replacement data operation；
The CRC check value of intermediate protocol data packet to be converted is calculated, and it is to be converted that the CRC check value is updated to the centre
In protocol data packet, target protocol data packet to be converted is obtained.
2. the method according to claim 1, wherein modification operation is increase data manipulation or deletes data
Operation；
Calculate the CRC check value of centre protocol data packet to be converted, and by the CRC check value be updated to the centre to
In Conversion Protocol Data packet, obtaining target protocol data packet to be converted includes: to be obtained based on CRC generating principle to the packet header
When data execute modification operation, the first data information of generation；
Calculate the CRC check value of first data information；
By the CRC check value of first data information, it is updated in the protocol data packet to be converted of the centre, obtains the mesh
Mark protocol data packet to be converted.
3. the method according to claim 1, wherein modification operation is that replacement data operates；
Based on target protocol conversion requirements, modification is executed to the header data in transmission correctly initial protocol data packet to be converted
Operation, obtaining intermediate protocol data packet to be converted includes:
Based on the target protocol conversion requirements, the header data is deleted；
Target data is added in the correct initial protocol data packet to be converted of the transmission, target agreement number to be converted is obtained
According to packet, wherein the target data is the data for replacing the header data.
4. according to the method described in claim 3, it is characterized in that, if modification operation is that replacement data operates；
The CRC check value of the header data is calculated, and the CRC check value is updated to centre protocol data to be converted
Bao Zhong, obtaining target protocol data packet to be converted includes:
Based on CRC generating principle, when obtaining the deletion header data, the second data information of generation, and obtain and increase institute
When stating target data, the third data information of generation；
Calculate the CRC check value of second data information and the CRC check value of the third data information；
The CRC check value of the CRC check value of second data information and the third data information is updated to the centre
In protocol data packet to be converted, target protocol data packet to be converted is obtained.
5. the method according to claim 1, wherein the method also includes:
Target protocol data packet to be converted is sent to target device, wherein the target device includes: switching equipment,
Terminal device.
6. a kind of CRC computing system of heterogeneous protocol conversion, which is characterized in that the system comprises: data sink, CRC solution
Code device, protocol converter and CRC calculate equipment, wherein
The data sink is for obtaining initial protocol data packet to be converted；
The CRC decoder is used to be decoded operation to the initial protocol data packet to be converted, is verified based on decoding result
Whether the initial protocol data packet to be converted transmits correctly；
If the protocol converter is correct for the initial protocol data packet transmission to be converted, wanted based on target protocol conversion
It asks, modification operation is executed to the header data in the initial protocol data packet to be converted, obtains intermediate protocol data to be converted
Packet, wherein the modification operation comprises at least one of the following: increasing data manipulation, deletes data manipulation, replacement data operation；
The CRC calculates the CRC check value that equipment is used to calculate intermediate protocol data packet to be converted, and by the CRC check value
It is updated in the protocol data packet to be converted of the centre, obtains target protocol data packet to be converted.
7. system according to claim 6, which is characterized in that
The CRC calculates equipment and is used in the case where modification operation is increases data manipulation or deletion data operation, base
In CRC generating principle, when obtaining to header data execution modification operation, the first data information of generation；
Calculate the CRC check value of first data information；
By the CRC check value of first data information, it is updated in the protocol data packet to be converted of the centre, obtains the mesh
Mark protocol data packet to be converted.
8. system according to claim 6, which is characterized in that
The protocol converter is used to turn in the case where modification operation is replacement data operation based on the target protocol
Requirement is changed, the header data is deleted；
Target data is added in the correct initial protocol data packet to be converted of the transmission, target agreement number to be converted is obtained
According to packet, wherein the target data is the data for replacing the header data.
9. system according to claim 8, which is characterized in that
The CRC calculates equipment and is used to be based on CRC generating principle in the case where modification operation is replacement data operation,
It obtains when deleting the header data, the second data information of generation, and obtains when increasing the target data, the of generation
Three data informations；
The CRC check value of the CRC check value of second data information and the third data information is updated to the centre
In protocol data packet to be converted, target protocol data packet to be converted is obtained.
10. system according to claim 6, which is characterized in that the system also includes:
Transmitter, for target protocol data packet to be converted to be sent to target device, wherein the target device packet
It includes: switching equipment, terminal device.
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| CN113079133A (en) * | 2021-03-16 | 2021-07-06 | 深圳市盛博科技嵌入式计算机有限公司 | Data transmission method of gateway and gateway equipment |
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