CN102957585B - The data transmission method of a kind of Ethernet and data transmission device - Google Patents
The data transmission method of a kind of Ethernet and data transmission device Download PDFInfo
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- CN102957585B CN102957585B CN201210510861.5A CN201210510861A CN102957585B CN 102957585 B CN102957585 B CN 102957585B CN 201210510861 A CN201210510861 A CN 201210510861A CN 102957585 B CN102957585 B CN 102957585B
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Abstract
The invention discloses data transmission method and the data transmission device of a kind of Ethernet.The method includes: transmitting terminal arranges the procotol value of type field in ethernet frame according to the destination address of destination address field (DAF) in ethernet frame and the frame check value of frame check field and sends this ethernet frame；Receiving terminal receives ethernet frame and judges whether the procotol value in ethernet frame is private network protocol value；If so, the packet during receiving terminal extracts ethernet frame.By the way, the procotol value of the type field of the present invention dynamically changes, and hacker cannot crack the Changing Pattern of type field by Statistics thus obtain the data of transmission in ethernet frame, thus substantially increases the safety of data transmission.
Description
Technical field
The present invention relates to field of data transmission, particularly to data transmission method and the data transmission dress of a kind of Ethernet
Put.
Background technology
Along with the development of ethernet technology, people rely on Ethernet to transmit data more and more, how to ensure data
The safety of transmission and confidentiality, have become as the problem that people increasingly pay close attention to.
Traditional Ethernet data transmission uses transmission control protocol/Internet Protocol (Transmission
Control Protocol/Internet Protocol, TCP/IP), in order to realize interconnecting easily mutually between the network terminal
Logical, ICP/IP protocol is at the design initial stage, it is contemplated that much for the rule needing everybody jointly to observe that interconnects, this way
Opening and convenience is provided, but it does not have think over its safety and confidentiality for everybody.Also just because of this rule
Change and standardization, leave potential safety hazard to assault network.
Assault network obtains the all-network information of transmission data often through the approach of network intercepting, such as,
Packet information.Then, analytical data package informatin, with reference to the rule of ICP/IP protocol, try to figure out data and pass the intention of loser.Profit again
By the rule of ICP/IP protocol, copy/distort/manufacture network packet maliciously, to realize: destroy and pass loser's intention, realization
The purpose that oneself is intended to.
Therefore, improving the safety of the data transmission of Ethernet, preventing assault is a problem demanding prompt solution.
Summary of the invention
The technical problem that present invention mainly solves be to provide the high Ethernet of a kind of security performance data transmission method and
Data transmission device.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide the data of a kind of Ethernet to pass
Transmission method, the method includes: transmitting terminal is according to the destination address of destination address field (DAF) in ethernet frame and the frame of frame check field
Check value arranges the procotol value of the type field in ethernet frame；
Whether the procotol value judging ethernet frame is existing procotol value；If so, split in ethernet frame
Packet the ethernet frame of the packet after building corresponding fractionation, return and judge whether the procotol value of ethernet frame is
The step of some procotol values, if it is not, send ethernet frame；
Receiving terminal receives ethernet frame and judges whether the procotol value in ethernet frame is private network protocol value；If
It is that receiving terminal extracts the packet in ethernet frame；
Wherein procotol value to be sent is set by transmitting terminal according to linear function f (x1, x2, x3, x4, x5, x6, x7)
Put, wherein,
F (x1, x2, x3, x4, x5, x6, x7)
=a1 × x1+a2 × x2+a3 × x3+a4 × x4+a5 × x5+a6 × x6+a7 × x7,
A1, a2, a3, a4, a5, a6, a7 are constant, and x1, x2, x3, x4, x5, x6 are corresponding in turn to destination in ethernet frame
Six bytes of location field, a byte of the lowest order of frame check field in x7 correspondence ethernet frame.
Wherein, receiving terminal judge the procotol value in ethernet frame whether with linear function f (x1, x2, x3, x4, x5,
X6, x7) value equal；If equal, then judge that the procotol value in ethernet frame is private network protocol value.
Wherein, a1, a2, a3, a4, a5 and a6 positive negative integer successively is arranged, and a1 and a2, a3 and a4, a5 and a6
The difference of absolute value is less than or equal to 10 and more than or equal to-10, and a7 is the positive integer less than or equal to 10, so that procotol value is less than
In 32767 and more than or equal to-32767.
Wherein, the step bag of the ethernet frame of the packet after splitting the packet in ethernet frame and building corresponding fractionation
Include: split the packet in ethernet frame to form the first packet and the second packet；Obtain corresponding first packet respectively
Frame check value with the second packet；The network association of corresponding first packet and the second packet is obtained respectively according to frame check value
View value；Corresponding first packet and the ethernet frame of the second packet is built respectively according to frame check value and procotol value.
Wherein, the step of the frame check value obtaining corresponding first packet and the second packet respectively is: according to formulaObtain the frame check value of corresponding first packet and the second packet, wherein, D [i] corresponding first data respectively respectively
Data in units of byte in bag and the second packet, the most corresponding first packet of n and the second packet with byte are
The number of the data of unit.
Wherein, existing procotol value is 0x0800,0x0806,0x8137 or 0x809B.
For solving above-mentioned technical problem, another technical solution used in the present invention is: provide a kind of data transmission device,
This device includes: procotol value arranges module, for according to the destination address of destination address field (DAF) in ethernet frame and frame school
The frame check value testing field arranges the procotol value of the type field in ethernet frame；Wherein, transmitting terminal is according to linear function f
(x1, x2, x3, x4, x5, x6, x7) arranges procotol value, wherein,
F (x1, x2, x3, x4, x5, x6, x7)
=a1 × x1+a2 × x2+a3 × x3+a4 × x4+a5 × x5+a6 × x6+a7 × x7,
A1, a2, a3, a4, a5, a6, a7 are constant, and x1, x2, x3, x4, x5, x6 are corresponding in turn to destination in ethernet frame
Six bytes of location field, a byte of the lowest order of frame check field in x7 correspondence ethernet frame；
Sending module, is used for sending ethernet frame；Receiver module, is used for receiving ethernet frame；First judge module, is used for
Whether the procotol value judging the type field in ethernet frame is private network protocol value；
Packet extraction module, for judging the procotol value of the type field in ethernet frame when the first judge module
During for private network protocol value, extract the packet in ethernet frame；
Second judge module, is used for judging whether procotol value is existing procotol value；Ethernet frame builds mould
Block, for when the second judge module judges procotol value as existing procotol value, splitting the packet in ethernet frame
And build the ethernet frame of the packet after corresponding fractionation.
Wherein, the first judge module judge the procotol value in ethernet frame whether with linear function f (x1, x2, x3,
X4, x5, x6, x7) value equal；If equal, then judge that the procotol value in ethernet frame is private network protocol value.
The invention has the beneficial effects as follows: compared with prior art, the data transmission method of the Ethernet of the present invention and data
Transmitting device, it arranges ether by the destination address of destination address field (DAF) in ethernet frame and the frame check value of frame check field
The procotol value of the type field in net frame, the procotol value of type field dynamically changes, and hacker cannot be former by statistics
Reason cracks the Changing Pattern of type field thus obtains the data of transmission in ethernet frame, thus substantially increases data transmission
Safety.
Accompanying drawing explanation
Fig. 1 is the flow chart of the data transmission method of the Ethernet of first embodiment of the invention；
Fig. 2 is the flow chart of the data transmission method of the Ethernet of second embodiment of the invention；
Fig. 3 is the ethernet frame of the packet after splitting the packet in ethernet frame in Fig. 2 and building corresponding fractionation
Flow chart；
Fig. 4 is the structural representation of the data transmission device of the Ethernet of first embodiment of the invention.
Detailed description of the invention
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Data transmission method disclosed by the invention is data transmission method based on Ethernet, the system architecture bag used
Include transmitting terminal and receiving terminal, transmitting terminal and receiving terminal by Ethernet mutual data transmission.Wherein, transmitting terminal and receiving terminal are permissible
It is PC, mobile phone, TV or panel computer etc..Further, the data transmission method of the present invention utilizes three-layer network model,
It is respectively physical layer, data link layer and application layer.
As it is known by the man skilled in the art, by Ethernet mutual data transmission, need data to be sealed in data link layer
Then the form dressing up ethernet frame is transmitted by physical layer.Wherein, ethernet frame includes 7 byte lead codes, 1 byte frame
First symbol, 6 byte destination addresses, 6 byte source addresses, 2 byte type field, 46～1500 byte data and 4 byte frame check
Field.The structure of ethernet frame is specific as follows shown:
| Lead code | Frame first symbol | Destination address | Source address | Type field | Data field | Frame check field |
| 7B | 1B | 6B | 6B | 2B | 46-1500B | 4B |
In the structure of ethernet frame, type field represents that network protocol type, existing network protocol type include IP
Agreement, ARP protocol, Novell Internetwork Packet Exchange, Apple Talk agreement etc., the procotol value of its correspondence is respectively as follows:
0x0800、0x0806、0x8137、0x809B。
Fig. 1 is the flow chart of the data transmission method of the Ethernet of first embodiment of the invention.As it is shown in figure 1, the party
Method includes step:
Step S11: transmitting terminal is according to the destination address of destination address field (DAF) in ethernet frame and the frame school of frame check field
Test value arrange the procotol value of type field in ethernet frame and send ethernet frame, and perform step S12；
Private data to be sent is packaged into the form of ethernet frame and sends this Ethernet by Ethernet by transmitting terminal
Frame.
In the present embodiment, transmitting terminal arranges ethernet frame according to linear function f (x1, x2, x3, x4, x5, x6, x7)
In procotol value to be sent, wherein,
F (x1, x2, x3, x4, x5, x6, x7)=
A1 × x1+a2 × x2+a3 × x3+a4 × x4+a5 × x5+a6 × x6+a7 × x7,
A1, a2, a3, a4, a5, a6, a7 are constant, and x1, x2, x3, x4, x5, x6 are corresponding in turn to destination in ethernet frame
Six bytes of location field, a byte of the lowest order of frame check field in x7 correspondence ethernet frame.
Further, though a1, a2, a3, a4, a5, a6, a7 are constant, but its value need to meet certain rule, so that network
Protocol value is less than or equal to 32767 and more than or equal to-32767.Specifically, a1, a2, a3, a4, a5 and a6 are one positive one negative whole successively
Number is arranged, and the difference of the absolute value of a1 and a2, a3 and a4, a5 and a6 is less than or equal to 10 and more than or equal to-10, and a7 takes and is less than or equal to
The positive integer of 10.In the present embodiment, procotol value can be on the occasion of alternatively negative value, and it uses complement format to store,
Procotol value accounts for 2 bytes, namely 16 in the form of ethernet frame again, therefore it is required that procotol value is less than or equal to
32767 and more than or equal to-32767.
Preferably, linear function f (x1, x2, x3, x4, x5, x6, x7) can also increase multiple multinomial to improve network
The confidentiality of protocol value, such as, increases multinomial a8*x8, and wherein, a8 takes the positive integer less than or equal to 10, x8 correspondence frame check
Byte for the highest order of field etc..
Such as, with the address of transmitting terminal as 0x8DCE97765D08, the address of receiving terminal is 0x5A80BACD90E7, sends
End illustrates send the private data bag of 46 bytes to receiving terminal as a example by.
Transmitting terminal first by the form that private data encapsulation is ethernet frame of 46 bytes the most again by this ethernet frame
It is sent to receiving terminal.The structure of this ethernet frame is specific as follows shown:
Wherein, lead code and frame first symbol are fixed value, and destination address is the address of the receiving terminal receiving ethernet frame, source
Address is the address of the transmitting terminal sending ethernet frame.Private data bag according to destination address, source address and 46 bytes can obtain
Getting frame check value is 0x06ECC5F3.
In the present embodiment, definition a1, a2, a3, a4, a5, a6, a7 represent respectively 34 with 10 system numbers ,-38,
21、-18、87、-79、8.In other embodiments, a1, a2, a3, a4, a5, a6, a7 can be defined for being different from this embodiment party
Other value of formula, only need to meet above-mentioned rule.
According to destination address 0x5A80BACD90E7, available x1, x2, x3, x4, x5, x6 be respectively 0x5A, 0x80,
0xBA、0xCD、0x90、0xE7。
According to frame check value 0x06ECC5F3, available x7 is 0xF3.
According to above-mentioned a1, a2, a3, a4, a5, a6, a7, x1, x2, x3, x4, x5, x6, x7, procotol value f can be obtained
(x1, x2, x3, x4, x5, x6, x7) is 0xEB0B.
In the present embodiment, because the x1 in linear function f (x1, x2, x3, x4, x5, x6, x7), x2, x3, x4, x5,
X6, x7 are underrange, and the procotol value of the type field that transmitting terminal is sent in the ethernet frame of receiving terminal dynamically changes, black
Visitor cannot crack the Changing Pattern of type field by Statistics thus obtain private data bag.
Step S12: receiving terminal receives ethernet frame, and performs step S13；
In the present embodiment, receiving terminal receives all ether of all destination address correspondence receiving terminal addresses from Ethernet
Net frame.
Step S13: receiving terminal judges whether the procotol value in ethernet frame is private network protocol value, the most then
Perform step S14, if it is not, then perform step S15；
Receiving terminal judge the procotol value in ethernet frame whether with linear function f (x1, x2, x3, x4, x5, x6, x7)
Value equal；If equal, then judge that the procotol value in ethernet frame is proprietary protocol value.
Accepting aforementioned, receiving terminal receives the ethernet frame of private data bag of band 46 byte that transmitting terminal sends, with
Reading very much available procotol value in net frame is 0xEB0B.The meter of the value of linear function f (x1, x2, x3, x4, x5, x6, x7)
Calculation method hereinbefore has been carried out describing in detail, does not repeats them here.It will be recalled from above that linear function f (x1, x2, x3,
X4, x5, x6, x7) value be 0xEB0B.It follows that the procotol value in the ethernet frame that receives of receiving terminal is privately owned
Procotol value, performs step S14.
It is assumed that receiving terminal receives the ethernet frame of private data of band 46 byte that transmitting terminal sends, but ethernet frame
The procotol value that middle reading obtains is other value differing from 0xEB0B, for example, 0x3B4B.And linear function f (x1, x2, x3,
X4, x5, x6, x7) value be 0xEB0B.It follows that the procotol value in the ethernet frame that receives of receiving terminal is the most private
There is procotol value, then perform step S15: receiving terminal abandons ethernet frame.
Step S14: extract the packet in ethernet frame.
After receiving terminal receives the ethernet frame that procotol value is private network protocol value, receiving terminal extracts Ethernet
Packet in frame also passes to application layer, and this packet is for further processing by application layer.
Accepting aforementioned, receiving terminal extracts the private data bag of 46 bytes in ethernet frame and passes to application layer, application
This private data bag is for further processing by layer.
Fig. 2 is the flow chart of the data transmission method of the Ethernet of second embodiment of the invention.As in figure 2 it is shown, the party
Method includes step:
Step S21: transmitting terminal is according to the destination address of destination address field (DAF) in ethernet frame and the frame school of frame check field
Test value and the procotol value of the type field in ethernet frame is set, and perform step S22；
This step is similar with step S11 in Fig. 1, does not repeats them here.
Step S22: whether the procotol value judging ethernet frame is existing procotol value, the most then perform step
Rapid S23, if it is not, then perform step S24；
Procotol value step S21 acquired is compared with existing procotol value, specifically, by step
The procotol value that S21 acquires is compared with above-mentioned existing procotol value 0x0800,0x0806,0x8137 or 0x809B
Relatively, if identical, then perform step S23, if it is different, then perform step S24.
Step S23: the ethernet frame of the packet after splitting the packet in ethernet frame and building corresponding fractionation, and hold
Row step S22；
When step S22 judges that the procotol value obtaining ethernet frame as existing procotol value, then needs this ether
Packet in net frame carries out the ethernet frame of the packet after splitting and build corresponding fractionation, until the ethernet frame after Gou Jianing
Procotol value different from existing procotol value till.
Fig. 3 is the ethernet frame of the packet after splitting the packet in ethernet frame in Fig. 2 and building corresponding fractionation
Flow chart.As it is shown on figure 3, step S23 specifically includes following steps:
Step S231: the packet in fractionation ethernet frame is to form the first packet and the second packet, and performs step
Rapid S232；
Packet in ethernet frame can be split from centre position, it is also possible to tear open from 1/3rd positions
Point, the position that packet splits is not limited by present embodiment.Further, the packet for obtaining after splitting adds multiple
The identical numerical value of byte is until the length of packet and the length of raw data packets are identical.
In the present embodiment, the packet ethernet frame is split to form the first packet and second from centre position
Packet.Further, the first packet formed after splitting and the second packet are added multiple bytes 0xFF, until the first number
Identical with the length of raw data packets with the length of the second packet according to bag.
Such as, the transmitting terminal encapsulation packet of 10 bytes and the ethernet frame that obtains, its structure is as follows:
Wherein, 10 byte datas are: 0x112233445566778899AA.
Because the procotol value of type field is 0x0800, identical with existing procotol value, then split 10 bytes
Packet is to form the first packet and the second packet, and the first packet and the second packet structure that obtain after fractionation are as follows
Shown in:
First packet is: 0x1122334455FFFFFFFFFF；
Second packet is: 0xFFFFFFFFF66778899AA.
Step S232: obtain the frame check value of corresponding first packet and the second packet respectively, and perform step S233；
Transmitting terminal is according to formulaObtain the frame check value of corresponding first packet and the second packet respectively, its
In, D [i] distinguishes the data in corresponding first packet and the second packet in units of byte, n corresponding first packet respectively
With the number of data in units of byte in the second packet.
Accept aforementioned, according to formulaThe frame check value obtaining corresponding first packet is: 0x5FA, corresponding second
The frame check value of packet is: 0x7A3.
In other embodiments, in the first packet/the second packet, data in units of byte also can be with leading
It is right that the data in units of byte in code, frame first symbol, destination address, source address and frame check field carry out suing for peace obtaining
Answer the frame check value of the first packet/the second packet.
Step S233: obtain the procotol value of corresponding first packet and the second packet according to frame check value respectively,
And perform step S234；
Transmitting terminal obtains corresponding first packet and the second data according to linear function f (x1, x2, x3, x4, x5, x6, x7)
The procotol value of bag, wherein, the method obtaining procotol value according to linear function f (x1, x2, x3, x4, x5, x6, x7) exists
In Fig. 1, step 11 has been carried out describing in detail, does not repeats them here.
Accept aforementioned, according to frame check value 5FA and the frame check value of corresponding second packet of corresponding first packet
7A3, can obtain procotol value 0xEB1B and the procotol value of corresponding second packet of corresponding first packet
0xE88B。
Step S234: build corresponding first packet and the second packet respectively according to frame check value and procotol value
Ethernet frame, and perform step S22.
Step S231, step S232, step S233 are acquired procotol value, the first packet/the second packet
Store with frame check value the type field to ethernet frame, data field and frame check field with build corresponding first packet/
The ethernet frame of the second packet.
Accepting aforementioned, the ethernet frame that the first packet/the second packet is corresponding is specific as follows shown:
Wherein, the first packet is: 0x1122334455FFFFFFFFFF；
Wherein, the second packet is: 0xFFFFFFFFF66778899AA.
Step S24: transmitting terminal sends ethernet frame, and performs step S25；
Transmitting terminal by physical layer send ethernet frame, to send this ethernet frame to receiving terminal, it is achieved transmitting terminal and
Data interaction between receiving terminal.
Step S25: receiving terminal receives ethernet frame, and performs step S26；
This step is similar with step S12 in Fig. 1, does not repeats them here.
Step S26: receiving terminal judges whether the procotol value in ethernet frame is private network protocol value, the most then
Perform step S27, if it is not, then perform step S28；
This step is similar with step S13 in Fig. 1, does not repeats them here.
Step S27: receiving terminal extracts the packet in ethernet frame；
In the present embodiment, receiving terminal is after the packet extracted in ethernet frame, and the content of read data packet is also sentenced
Whether the packet of disconnected ethernet frame is the packet split, the most then splice this packet split to form one
Complete packet.Specifically, it is judged that whether with the identical numerical value of multiple bytes in packet, the most then judge this number
It it is the packet split according to bag.Wherein, the connecting method of packet is corresponding with the fractionation mode of step S231 in Fig. 3.
Accept aforementioned, when receiving terminal reads the first packet, because the first packet has 5 bytes continuous in low byte storage
0xFF, then judge that the first packet is the packet split.When receiving terminal reads the second packet, because the second packet exists
Upper byte storage has 5 byte continuous print 0xFF, then judge that the second packet is the packet split.Splice the first packet
The complete data packet that transmitting terminal the most available with the second packet sends.
Step S28: receiving terminal abandons ethernet frame.
Fig. 4 is the structural representation of the data transmission device of the Ethernet of first embodiment of the invention.Such as Fig. 4 institute
Showing, this device includes: procotol value arranges module the 10, second judge module 20, ethernet frame builds module 30, sending module
40, receiver module the 50, first judge module 60, packet extraction module 70.
Procotol value arranges module 10, for according to the destination address of destination address field (DAF) in ethernet frame and frame check
The frame check value of field arranges the procotol value of the type field in ethernet frame.
Wherein, procotol value arranges module 10 and arranges pending according to linear function f (x1, x2, x3, x4, x5, x6, x7)
SCN Space Cable Network protocol value, wherein,
F (x1, x2, x3, x4, x5, x6, x7)
=a1 × x1+a2 × x2+a3 × x3+a4 × x4+a5 × x5+a6 × x6+a7 × x7,
A1, a2, a3, a4, a5, a6, a7 are constant, and x1, x2, x3, x4, x5, x6 are corresponding in turn to destination in ethernet frame
Six bytes of location field, a byte of the lowest order of frame check field in x7 correspondence ethernet frame.
Second judge module 20, builds module 30 with ethernet frame respectively and procotol value arranges module 10 and is connected, use
In judging whether procotol value is existing procotol value.
Ethernet frame builds module 30, is connected with the second judge module 20, for judging that network is assisted when the second judge module
When view value is for existing procotol value, the Ethernet of the packet after splitting the packet in ethernet frame and building corresponding fractionation
Frame.
Sending module 40, is connected with the second judge module 20, for judging procotol value not when the second judge module 20
When being existing procotol value, send ethernet frame.
Receiver module 50, is connected with sending module 40, is used for receiving ethernet frame.
First judge module 60, is connected 50 with receiver module, for judging the network association of the type field in ethernet frame
Whether view value is private network protocol value.
Wherein, the first judge module 60 judge the procotol value of the type field in ethernet frame whether with above-mentioned linearly
The value of function f (x1, x2, x3, x4, x5, x6, x7) is equal；If equal, then judge that the procotol value in ethernet frame is privately owned
Procotol value.
Packet extraction module 70, is connected with the first judge module 60, for judging Ethernet when the first judge module 60
When the procotol value of the type field in frame is private network protocol value, extract the packet in ethernet frame.
The invention has the beneficial effects as follows: compared with prior art, compared with prior art, the data of the Ethernet of the present invention
Transmission method and data transmission device, its destination address passing through destination address field (DAF) in ethernet frame and the frame of frame check field
Check value arranges the procotol value of the type field in ethernet frame, and the procotol value of type field dynamically changes, hacker
The Changing Pattern of type field cannot be cracked by Statistics thus obtain the data of transmission in ethernet frame, the most significantly carry
The high safety of data transmission.
The foregoing is only embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilization is originally
Equivalent structure or equivalence flow process that description of the invention and accompanying drawing content are made convert, or are directly or indirectly used in what other were correlated with
Technical field, is the most in like manner included in the scope of patent protection of the present invention.
Claims (8)
1. the data transmission method of an Ethernet, it is characterised in that described method includes:
Transmitting terminal arranges described according to the destination address of destination address field (DAF) in ethernet frame and the frame check value of frame check field
The procotol value of the type field in ethernet frame；
Whether the described procotol value judging described ethernet frame is existing procotol value；
The described Ethernet of the described packet after if so, splitting the packet in described ethernet frame and building corresponding fractionation
Frame, returns the step whether described described procotol value judging described ethernet frame is existing procotol value, if it is not,
Send described ethernet frame；
Receiving terminal receives described ethernet frame and judges whether the described procotol value in described ethernet frame is private network
Protocol value；
If so, the packet during receiving terminal extracts described ethernet frame；
Wherein, procotol value to be sent is set by described transmitting terminal according to linear function f (x1, x2, x3, x4, x5, x6, x7)
Put, wherein,
F (x1, x2, x3, x4, x5, x6, x7)=
A1 × x1+a2 × x2+a3 × x3+a4 × x4+a5 × x5+a6 × x6+a7 × x7,
A1, a2, a3, a4, a5, a6, a7 are constant, and x1, x2, x3, x4, x5, x6 are corresponding in turn to mesh described in described ethernet frame
Six bytes of address field, a byte of the lowest order of frame check field described in the corresponding described ethernet frame of x7.
Data transmission method the most according to claim 1, it is characterised in that described receiving terminal judges in described ethernet frame
Described procotol value the most equal with the value of described linear function f (x1, x2, x3, x4, x5, x6, x7)；If equal, then sentence
Described procotol value in disconnected described ethernet frame is private network protocol value.
Data transmission method the most according to claim 1 and 2, it is characterised in that described a1, described a2, described a3, described
A4, a described a5 and described a6 positive negative integer successively is arranged, and described a1 and described a2, described a3 and described a4, described a5
Less than or equal to 10 and being more than or equal to-10 with the difference of the absolute value of described a6, described a7 is the positive integer less than or equal to 10, so that institute
State procotol value less than or equal to 32767 and more than or equal to-32767.
Data transmission method the most according to claim 1, it is characterised in that described in the described ethernet frame of described fractionation
The step of the described ethernet frame of packet the described packet after building corresponding fractionation includes:
Split the described packet in described ethernet frame to form the first packet and the second packet；
Obtain corresponding described first packet and the described frame check value of described second packet respectively；
Corresponding described first packet and the described procotol of described second packet is obtained respectively according to described frame check value
Value；
Corresponding described first packet and described second data is built respectively according to described frame check value and described procotol value
The described ethernet frame of bag.
Data transmission method the most according to claim 4, it is characterised in that described corresponding described first data of acquisition respectively
The step of the described frame check value of bag and described second packet is:
According to formulaObtain corresponding described first packet and the described frame check value of described second packet respectively, its
In, D [i] distinguishes the data in corresponding described first packet and described second packet in units of byte, the most corresponding institute of n
State in the first packet and described second packet the number of described data in units of byte.
Data transmission method the most according to claim 1, it is characterised in that described existing procotol value is
0x0800,0x0806,0x8137 or 0x809B.
7. the data transmission device of an Ethernet, it is characterised in that described device includes:
Procotol value arranges module, for according to the destination address of destination address field (DAF) in ethernet frame and frame check field
Frame check value arranges the procotol value of the type field in described ethernet frame；
Wherein, described procotol value arranges module and arranges described net according to linear function f (x1, x2, x3, x4, x5, x6, x7)
Network protocol value, wherein,
F (x1, x2, x3, x4, x5, x6, x7)
=a1*x1+a2*x2+a3*x3+a4*x4+a5*x5+a6*x6+a7*x7,
A1, a2, a3, a4, a5, a6, a7 are constant, and x1, x2, x3, x4, x5, x6 are corresponding in turn to mesh described in described ethernet frame
Six bytes of address field, a byte of the lowest order of frame check field described in the corresponding described ethernet frame of x7；
Sending module, is used for sending described ethernet frame；
Receiver module, is used for receiving described ethernet frame；
Whether the first judge module, be private for judging the described procotol value of the described type field in described ethernet frame
There is procotol value；
Packet extraction module, for judging the institute of the described type field in described ethernet frame when described first judge module
State procotol value when being private network protocol value, extract the packet in described ethernet frame；
Second judge module, is used for judging whether described procotol value is existing procotol value；
Ethernet frame builds module, for judging that described procotol value is as existing procotol value when described second judge module
Time, the described ethernet frame of the described packet after splitting the described packet in described ethernet frame and building corresponding fractionation.
Data transmission device the most according to claim 7, it is characterised in that described first judge module judges described ether
Described procotol value in net frame is the most equal with the value of described linear function f (x1, x2, x3, x4, x5, x6, x7)；If phase
Deng, then judge that the described procotol value in described ethernet frame is described private network protocol value.
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| CN108112031B (en) * | 2016-11-24 | 2020-01-10 | 腾讯科技（深圳）有限公司 | Network type determination method and device |
| CN107483279B (en) * | 2017-10-10 | 2020-06-12 | 福建星网智慧软件有限公司 | Method for local batch operation of network equipment based on Ethernet frame |
| CN112398780B (en) * | 2019-08-13 | 2023-08-08 | 南京智数科技有限公司 | Equipment self-identification communication method suitable for multiple networks |
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| WO2007065358A1 (en) * | 2005-12-06 | 2007-06-14 | Huawei Technologies Co., Ltd. | Method and system for service processing based on vlan stack |
| CN101051874A (en) * | 2007-05-18 | 2007-10-10 | 北京大学 | Simulating moving self organization network method |
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| WO2007065358A1 (en) * | 2005-12-06 | 2007-06-14 | Huawei Technologies Co., Ltd. | Method and system for service processing based on vlan stack |
| CN101051874A (en) * | 2007-05-18 | 2007-10-10 | 北京大学 | Simulating moving self organization network method |
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