CN110035016A - A kind of data transmission method and device - Google Patents
A kind of data transmission method and device Download PDFInfo
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- CN110035016A CN110035016A CN201910142520.9A CN201910142520A CN110035016A CN 110035016 A CN110035016 A CN 110035016A CN 201910142520 A CN201910142520 A CN 201910142520A CN 110035016 A CN110035016 A CN 110035016A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004891 communication Methods 0.000 claims description 64
- 239000012634 fragment Substances 0.000 claims description 56
- 241001269238 Data Species 0.000 claims description 43
- 230000011218 segmentation Effects 0.000 claims description 11
- 230000006798 recombination Effects 0.000 claims description 10
- 238000005215 recombination Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 6
- 101000911390 Homo sapiens Coagulation factor VIII Proteins 0.000 claims description 3
- 102000057593 human F8 Human genes 0.000 claims description 3
- 229940047431 recombinate Drugs 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
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- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
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Classifications
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- 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
- H04L47/36—Flow control; Congestion control by determining packet size, e.g. maximum transfer unit [MTU]
-
- 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
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/323—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the physical layer [OSI layer 1]
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- Computer Security & Cryptography (AREA)
- Quality & Reliability (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The embodiment of the present invention provides a kind of data transmission method and device, and wherein data transmission method for uplink includes: the first maximum transmission unit MTU for obtaining sending device, and obtains the 2nd MTU of receiving device；According to the first MTU and the 2nd MTU, maximum message size when data transmission is determined；Data to be sent are sent to the receiving device by the MAC address of the receiving device obtained according to the maximum message size and in advance.The embodiment of the present invention, which realizes, directly to be carried out data transmission by hardware device, and the problem of carrying out data transmission in the prior art by network protocol stack in operating system is avoided.
Description
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of data transmission methods and device.
Background technique
Currently, operation has the operations such as embedded OS, such as Linux and Vxworks system in big multiple network equipment
System, and operation has network protocol stack in operating system.In this way, the application in need using network ought be installed in the network device
When program, application program can carry out the transmitting-receiving of network data by the network protocol stack of operating system.
But although application program can carry out data transmission by the network protocol stack of operating system, have such as
Lower defect:
First, the hardware resource requirements to the network equipment are higher, for example, at least need to run a complete operating system；
Second, the protocol encapsulation of network data is limited by the network protocol stack of operating system, lead to that network cannot be detached from
Protocol stack and carry out freely customizing data message content.
In conclusion there is ask higher to the network protocol stack dependence of operating system in existing network data transmission
Topic.
Summary of the invention
The embodiment of the present invention provides a kind of data transmission method and device, to solve the biography of network data in the prior art
It is defeated to the higher problem of the dependence of network protocol stack in operating system, realize and directly pass through hardware device progress network data
Transmission.
The embodiment of the present invention provides a kind of data transmission method for uplink, is applied to sending device, comprising:
The first maximum transmission unit MTU of sending device is obtained, and obtains the 2nd MTU of receiving device；
According to the first MTU and the 2nd MTU, maximum message size when data transmission is determined；
The MAC address of the receiving device obtained according to the maximum message size and in advance, will be pending
Data are sent to be sent to the receiving device.
The embodiment of the present invention provides a kind of data receiver method, is applied to receiving device, comprising:
Receive data transmitted by sending device；Wherein the data be sending device according to maximum message size and in advance
The MAC address of the receiving device of acquisition is sent, and the maximum message size is the sending device root
It is determined according to the first maximum transmission unit MTU of sending device and the 2nd MTU of receiving device.
The embodiment of the present invention provides a kind of data sending device, is applied to sending device, comprising:
Module is obtained, for obtaining the first maximum transmission unit MTU of sending device, and obtains the second of receiving device
MTU；
Determining module, for determining maximum message size when data transmission according to the first MTU and the 2nd MTU；
Sending module, the media access control of the receiving device for obtaining according to the maximum message size and in advance
Data to be sent are sent to the receiving device by MAC Address.
The embodiment of the present invention provides a kind of data sink, is applied to receiving device, comprising:
First receiving module, for receiving data transmitted by sending device；Wherein the data be sending device according to
The MAC address of maximum message size and the receiving device obtained in advance is sent, and the maximum message segment is long
Degree is determined by the sending device according to the first maximum transmission unit MTU of sending device and the 2nd MTU of receiving device.
The embodiment of the present invention provides a kind of electronic equipment, including memory, processor and storage are on a memory and can be
The step of computer program run on processor, the processor realizes the data transmission method for uplink when executing described program
Or the step of described data receiver method.
The embodiment of the present invention provides a kind of non-transient computer readable storage medium, is stored thereon with computer program, should
The step of data transmission method for uplink is realized when computer program is executed by processor or the data receiver method
Step.
Data transmission method and device provided in an embodiment of the present invention, by the first MTU and the reception that obtain sending device
2nd MTU of equipment, and according to the first MTU and the 2nd MTU determine data transmission when maximum message size, finally according to really
Data to be sent are sent to receiving device by the MAC Address of fixed maximum message size and the receiving device obtained in advance, are realized
Be directly based upon MAC Address, i.e. data link layer carries out data transmission, and then realize data to be sent directly pass through hardware into
Row is sent, and avoids the problem of carrying out data transmission in the prior art by network protocol stack in device operating system, and then solve
Data transmission in the prior art determined to the higher problem of the dependence of network protocol stack in operating system.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the step flow chart for being applied to the data transmission method for uplink of sending device in the embodiment of the present invention；
Fig. 2 is the step flow chart for being applied to the data receiver method of receiving device in the embodiment of the present invention；
Fig. 3 is the module frame chart for being applied to the data sending device of sending device in the embodiment of the present invention；
Fig. 4 is the module frame chart for being applied to the data sink of receiving device in the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of electronic equipment in the 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 the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, to be applied to the step flow chart of the data transmission method for uplink of sending device in the embodiment of the present invention, it should
Method includes the following steps:
Step 101: obtaining the first maximum transmission unit MTU of sending device, and obtain the 2nd MTU of receiving device.
Specifically, maximum transmission unit (abbreviation MTU) refers to can pass through most above a certain layer of communication protocol a kind of
Big data packet size, such as unit of byte.
In this step, sending device obtains the first MTU of itself, and obtains the 2nd MTU of receiving device, so that
Sending device, which can specify, itself can transmit the maximum data packet size of data, and can specify receiving device and can transmit number
According to maximum data packet size so that the maximum data packet of data can be transmitted according to itself and receiving device both sides
Size negotiates to determine maximum message size when both sides carry out data transmission.
Wherein, sending device is when obtaining two MTU of receiving device, with can first obtaining the MAC of the receiving device
Location, then according to the MAC Address of the receiving device, Xiang Suoshu receiving device sends message length negotiation information, so that described
Receiving device feeds back the 2nd MTU of the receiving device according to the message length negotiation information, finally receives the reception and sets
Standby the 2nd MTU fed back according to the message length negotiation information.
Specifically, the first MTU of the sending device is carried in message length negotiation information, so that the receiving device
Maximum message size when data transmission can be determined according to the 2nd MTU of the first MTU and receiving device itself.
In addition, can also be multicast specifically, the MAC Address of acquired receiving device can be broadcast MAC address
MAC Address.
In this way, sending device carries the message length negotiation information of itself the first MTU by sending to receiving device, make
The 2nd MTU of itself can be fed back according to the message length negotiation information by obtaining receiving device, to realize sending device and connect
Between receiving unit when needing to communicate, directly by information exchange, the acquisition to other side MTU realizes convenience when MTU is obtained
Property.
Step 102: according to the first MTU and the 2nd MTU, determining maximum message size when data transmission.
In this step, specifically, sending device the 2nd MTU of the first MTU and receiving device that get itself it
Afterwards, maximum message size when data transmission can be determined according to the first MTU and the 2nd MTU.
It wherein, can will be described when maximum message size when according to the first MTU and the 2nd MTU, determining data transmission
First MTU and the 2nd MTU are compared, and determine the smaller MTU in the first MTU and the 2nd MUT, then will it is described compared with
Data packet length corresponding to small MTU is determined as the maximum message size.
In this way, by the way that data packet length corresponding to smaller MTU in the first MTU and the 2nd MTU is determined as maximum message segment
Length ensure that between sending device and receiving device when carrying out data transmission, sending device and receiving device can connect
Data transmitted by other side are received, ensure that complete transmission of the data between sending device and receiving device.
Step 103: the MAC address of the receiving device obtained according to maximum message size and in advance, it will
Data to be sent are sent to receiving device.
It in this step, can be directly according to identified maximum message segment specifically, after determining maximum message size
Data to be sent are sent to receiving device by the MAC Address of length and the receiving device obtained in advance.
In this way, being based on maximum message size, it ensure that data to be sent are complete between sending device and receiving device
Transmission；MAC Address based on receiving device realizes and is directly based upon data link layer progress between sending device and receiving device
Communication, so that realizing sending device directly can send data to be sent by hardware device, and then realizes network data
Transmission no longer need the network protocol stack of operating system to support, reduce network data communication for hardware and software systems
The dependence of (such as network layer, session layer and application layer etc. in network protocol stack), and operating system is got rid of to transport protocol
Limitation, so that the present embodiment can be applied to the compact embedded system of resource, and can easily encapsulate in messages
Arbitrary data improves the flexibility of data transmission.
Wherein, in the MAC address of the receiving device obtained according to the maximum message size and in advance,
May include following sub-step when data to be sent are sent to the receiving device:
Step S31: the total length of data of the data to be sent is obtained, and judges the data overall length of the data to be sent
Whether degree is greater than the maximum message size.
In this step, specifically, sending device needs to obtain the data of data to be sent when sending data to be sent
Total length, and maximum message size when being carried out data transmission according to total length of data and sending device determines data to be sent
Sending method.
Wherein, sending device is when determining the sending method of data to be sent, it can be determined that the number of the data to be sent
Whether it is greater than the maximum message size according to total length, and obtains the total length of data less than or equal to the maximum in judgement
When message length, 32 are entered step, when judgement obtains the total length of data greater than the maximum message size, is entered step
33。
Step S32: when judgement obtains the total length of data less than or equal to the maximum message size, direct basis
The data to be sent are sent to the receiving device by the MAC Address of the receiving device.
In this step, specifically, the total length of data based on data to be sent is less than or equal to maximum message size, because
Data to be sent can be sent to receiving device by a data packet directly according to the MAC Address of receiving device by this.
Step S33: when judgement obtains the total length of data greater than the maximum message size, according to the maximum report
Literary length is segmented the data to be sent, obtains multiple segment datas, and generate corresponding with each segment data
Fragment sequence number and communication identifier corresponding with the data to be sent；It then, will according to the MAC Address of the receiving device
The multiple segment data is respectively sent to the receiving device.
In this step, specifically, the total length of data based on data to be sent is greater than maximum message size, it is therefore desirable to
According to the MAC Address of receiving device, by data segment transmission to be sent to receiving device.
Specifically, needing to carry out data to be sent according to maximum message size when being segmented data to be sent
Segmentation, obtains multiple segment datas.In addition, after being segmented to data to be sent, in order to enable receiving device can be known
Whether not each segment data belongs to the data to be sent, and communication mark corresponding with data to be sent can be generated in sending device
Know, such as the communication identifier can be the communication identifier of a 32bit generated at random.In addition, being carried out to data to be sent
After segmentation, in order to which receiving device can be identified and be recombinated to each segment data, sending device can be generated with each
Segment data corresponding fragment sequence number, certainly it should be noted that the collating sequence and segment data of fragment sequence number
Segmentation order is identical, this enables receiving device directly to be recombinated according to fragment sequence number to segment data, avoids segmentation
The interference when precedence that data send and receive is to data recombination.
It is explained below by citing.
Assuming that the total length of data of data to be sent is 4800 bytes, maximum message size is 1000 bytes, then can be by
According to maximum message size, total length of data is segmented, obtains 5 segment datas, i.e., when total length of data and maximum message segment
When the quotient of length is not integer, needs to carry out quotient to be rounded into a method, obtain the number of segment data.In addition, treating
After transmission data are segmented, a communication identifier is generated at random, which has uniqueness, for number to be sent
According to being identified, and it is directed to each segment data, generates a fragment sequence number corresponding with the segmentation order of the segment data,
It is directed to first segment data, the fragment sequence number of generation can be 0, for second segment data, the fragment sequence number of generation
It can be 1, and so on, fragment sequence number corresponding to the 5th segment data is 4.
In addition, specifically, carried in each segment data the total length of data of the data to be sent, with it is described to
Send the corresponding communication identifier of data and fragment sequence number corresponding with the segment data.In this way, enabling receiving device
It is enough determined whether according to data length it is complete to data receiver to be sent, and can be according to communication corresponding with data to be sent
Mark, identifies whether multiple segment datas belong to same communication data, and can be according to corresponding with each segment data point
Section serial number carries out data recombination, to avoid interference of the order of segment data sent and received to data recombination.
In this way, being tied by the way that the total length of data of data to be sent to be compared with maximum message size, and according to comparing
Fruit determines whether to data to be sent progress segment transmissions, and when carrying out segment transmissions to data to be sent, in each segmentation
Total length of data, fragment sequence number and communication identifier are carried in data, ensure that the complete transmission process of data to be sent, and guarantee
Receiving device can completely receive and recombinate the data of sending device transmission, realize directly by hardware device to network
The transmission of data.
Furthermore, wherein after the multiple segment data is respectively sent to the receiving device, institute can also be received
Receiving device is stated after receiving multiple segment datas, entrained fragment sequence number in each segment data fed back, and root
According to received multiple fragment sequence numbers, detect whether the receiving device has received the corresponding institute of the data to be sent
There is segment data.
Specifically, when in multiple segment datas that received multiple fragment sequence numbers and the data to be sent are divided points
When section serial number is consistent, determine that the receiving device has received all segment datas corresponding with the data to be sent.
Specifically, receiving device after the segment data for receiving sending device transmission, is read in data accepted
Communication identifier and fragment sequence number, and the fragment sequence number being had received to sending device feedback one's own side.At this point, receiving device can incite somebody to action
The fragment sequence number generated when the fragment sequence number and segmentation that receive is compared, and is belonged to judging whether receiving device has received
All segment datas of data to be sent, and then guarantee the integrality of data transmission.
For example, it is assumed that the number for the segment data that data to be sent are divided is 5, fragment sequence number 0-4, then sending device
The fragment sequence number received and fragment sequence number 0-4 can be compared after the fragment sequence number for receiving receiving device feedback
Compared with illustrating that receiving device has received institute corresponding to data to be sent if the fragment sequence number received at this time is similarly 0-4
There is segment data.Certainly, if the fragment sequence number that sending device receives only has 0-3, illustrate that receiving device does not receive institute
Some segment datas also need to re-start at this time data transmission, to guarantee the integrality of data transmission.
In this way, data transmission method for uplink provided in this embodiment, by the first MTU and receiving device that obtain sending device
2nd MTU, and determine according to the first MTU and the 2nd MTU maximum message size when data transmission, it is last according to it is identified most
Data to be sent are sent to receiving device by the MAC Address of big message length and the receiving device obtained in advance, are realized directly
Based on MAC Address, i.e. data link layer carries out data transmission, and then realizes data to be sent and directly pass through hardware and sent out
It send, avoids the problem of carrying out data transmission in the prior art by network protocol stack in device operating system, and then solve
Data transmission reduces to hardware resource the higher problem of the dependence of network protocol stack in operating system in the prior art
It is required that so that the present embodiment can be applied to the compact embedded system of resource, and can easily encapsulate in messages any
Data.
In addition, as shown in Fig. 2, to be applied to the data receiver method of receiving device, this method packet in the embodiment of the present invention
Include following steps:
Step 201: receiving data transmitted by sending device.
In this step, specifically, receiving device receives data transmitted by sending device.
Specifically, the data are the MAC Address for the receiving device that sending device is obtained according to maximum message size and in advance
It is sent, the maximum message size is the sending device according to the second of the first MTU of sending device and receiving device
MTU is determined.
In this way, receiving device receives the number that sending device is sent according to the MAC Address of maximum message size and receiving device
According to realizing and be directly based upon MAC Address, i.e., based on the communication of data link layer, and realize directly through hardware device logarithm
According to reception, so as to avoid in the prior art rely on device operating system in network protocol stack carry out data transmission the problem of,
Avoiding data transmission in the prior art in turn reduces to hardware resource the dependence of network protocol stack in operating system
It is required that.
In addition, specifically, the present embodiment is before receiving data transmitted by sending device, it is also necessary to receive the transmission
The message length negotiation information that equipment is sent, and according to the message length negotiation information, the 2nd MTU of receiving device is sent
To the sending device, so that the sending device determines the maximum according to the first MTU and the 2nd MTU of sending device
Message length.
The first MTU of the sending device is wherein carried in the message length negotiation information, so that the reception is set
It is standby that maximum message size is determined according to the 2nd MTU of the first MTU and receiving device.Specifically, receiving device is according to
It, can will be corresponding to smaller MTU in the first MTU and the 2nd MTU when one MTU and itself the 2nd MTU determine maximum message size
Data packet length be determined as maximum message size, with guarantee with sending device determined by maximum message size consistency,
And guarantee that sending device and receiving device itself can send and receive complete data.
In this way, the MTU information exchange between sending device and receiving device is realized by message length negotiation information,
To realize convenience when MTU is obtained.
In addition, specifically, the present embodiment after receiving data transmitted by sending device, can also include following step
It is rapid:
Step 202: whether detection data is segment data.
In this step, specifically, receiving device is when receiving data, need whether detection data is segment data,
To judge whether to need to recombinate data.
Wherein, when whether detect the data is segment data, the data can be parsed, when parsing obtains
When carrying total length of data, communication identifier and fragment sequence number in the data, determine that the data are segment data.Wherein,
Segment data is the sending device when the total length of data that judgement obtains data to be sent is greater than the maximum message size,
According to the maximum message size, the data to be sent are segmented to obtain, and are carried in each segment data described
The total length of data of data to be sent, communication identifier corresponding with the data to be sent and corresponding with the segment data
Fragment sequence number.
In this way, carrying data overall length in each segment data when sending data to be sent based on sending device
Degree, communication identifier and fragment sequence number, thus when receiving device parse to obtain in data carry total length of data, communication identifier and
When fragment sequence number, it can determine that received data are segment data, ensure that the accuracy of judging result.
Step 203: when detect the data be segment data when, by the data with belong to same communication data its
He recombinates segment data.
In this step, specifically, when detecting data is segment data, by data and same communication number can be belonged to
According to other segment datas recombinated, to obtain complete communication data.
It wherein, can basis when being recombinated the data with other segment datas for belonging to same communication data
Entrained communication identifier in the data, obtains other segment datas for belonging to same communication data with the data, wherein
Entrained communication identifier is identical as communication identifier entrained in the data in other described segment datas；Then according to institute
Total length of data entrained in data is stated, detects whether communication data belonging to the data receives completely；And works as and detect
When receiving complete, according to segmentation sequence entrained in fragment sequence number and other described segment datas entrained in the data
Number, the data and other described segment datas are recombinated.
Specifically, whether communication data belonging to detection data receives in the total length of data entrained by data
When complete, can calculate the length of the data and the length of other segment datas and value, and when and be worth and total length of data
When identical, it is complete to determine that communication data belonging to data receives.
Certainly, it should be noted that receiving device is according to fragment sequence number entrained in data and other segmentations
Entrained fragment sequence number can be directly according to fragment sequence number when being recombinated data and other segment datas in data
Collating sequence is recombinated, to avoid interference of the precedence sent and received to recombination of data.
In this way, being realized based on communication identifier entrained in data to other segments for belonging to same communication data
According to identification obtain, ensure that the correct identification to the different segment datas of same communication data；Based on entrained in data
Total length of data realizes to whether communication data receives complete judgement, ensure that the accuracy of judgement；Based on institute in data
Entrained fragment sequence number, realizes between data and other segment datas in the fragment sequence number of carrying and other segment datas
Recombination, avoids interference of the data receiver order to data recombination, ensure that accuracy when data recombination.
In addition, specifically, can also divide entrained in the data after determining that the data are segment data
Section serial number is sent to the sending device, so that whether the sending device detects the receiving device according to the fragment sequence number
Have received all segment datas for belonging to same communication data.
In this way, by the way that the fragment sequence number carried in data is sent to sending device, enable sending device according to point
Section serial number judges whether receiving device receives all segment datas, so that sending device is capable of deciding whether to need to carry out
The transmission process again of data ensure that integrality when data transmission.
Data receiver method provided in this embodiment, by receiving sending device according to the MAC Address of receiving device and most
The data that big message length is sent, realize the direct communication based on data link layer, that is, realize and directly pass through hardware device
Reception to data, so as to avoid being asked in the prior art by what network protocol stack in device operating system carried out data transmission
Topic, and then data transmission in the prior art is avoided to the dependence of network protocol stack in operating system, it reduces to hardware money
The requirement in source.
In addition, as shown in figure 3, to be applied to the module frame of the data sending device of sending device in the embodiment of the present invention
Figure, the device include:
Module 301 is obtained, for obtaining the first maximum transmission unit MTU of sending device, and obtains the of receiving device
Two MTU；
Determining module 302, for determining maximum message size when data transmission according to the first MTU and the 2nd MTU；
Sending module 303, the media interviews control of the receiving device for obtaining according to the maximum message size and in advance
Data to be sent are sent to the receiving device by MAC Address processed.
Optionally, the acquisition module 301 includes:
Acquiring unit, for obtaining the MAC Address of the receiving device；
First transmission unit, for the MAC Address according to the receiving device, Xiang Suoshu receiving device sends message length
Negotiation information, so that the receiving device feeds back the 2nd MTU of the receiving device according to the message length negotiation information,
Described in the first MTU of the sending device is carried in message length negotiation information so that the receiving device is according to
2nd MTU of the first MTU and receiving device determines maximum message size when data transmission；
First receiving unit, described fed back for receiving the receiving device according to the message length negotiation information
Two MTU.
Optionally, the determining module 302 includes:
First determination unit, for the first MTU and the 2nd MTU to be compared, determine the first MTU and
Smaller MTU in 2nd MUT；
Second determination unit is long for data packet length corresponding to the smaller MTU to be determined as the maximum message segment
Degree.
Optionally, the sending module 303 includes:
Judging unit for obtaining the total length of data of the data to be sent, and judges the number of the data to be sent
Whether it is greater than the maximum message size according to total length；
Second transmission unit, for obtaining the total length of data less than or equal to the maximum message size when judgement
When, directly according to the MAC Address of the receiving device, the data to be sent are sent to the receiving device；
Segmenting unit, for when judgement obtains the total length of data greater than the maximum message size, according to described
Maximum message size is segmented the data to be sent, obtains multiple segment datas, and generate and each segment data phase
Corresponding fragment sequence number and communication identifier corresponding with the data to be sent；
Third transmission unit sends the multiple segment data for the MAC Address according to the receiving device respectively
To the receiving device, wherein carried in each segment data the total length of data of the data to be sent, with it is described to
Send the corresponding communication identifier of data and fragment sequence number corresponding with the segment data.
Optionally, described device further include:
Each of second receiving unit, for receiving the receiving device after receiving multiple segment datas, fed back
Entrained fragment sequence number in segment data；
Detection unit detects whether the receiving device has received for multiple fragment sequence numbers based on the received
The corresponding all segment datas of the data to be sent；Wherein,
When fragment sequence number in multiple segment datas that received multiple fragment sequence numbers and the data to be sent are divided
When consistent, determine that the receiving device has received all segment datas corresponding with the data to be sent.
In this way, data sending device provided in this embodiment, by obtaining the first MTU of module acquisition sending device and connecing
2nd MTU of receiving unit, and by determining module according to the first MTU and the 2nd MTU, maximum message segment when determining data transmission is long
Degree, finally by the MAC Address for the receiving device that sending module is obtained according to maximum message size and in advance, by data to be sent
It is sent to the receiving device, realizes and is directly based upon MAC Address, is i.e. data link layer carries out data transmission, and then realizes
Data to be sent directly pass through hardware and are sent, avoid in the prior art by network protocol stack in device operating system into
The problem of row data are transmitted, so solve the transmission of data in the prior art to the dependence of network protocol stack in operating system compared with
High problem.
In addition, as shown in figure 4, to be applied to the module frame of the data sink of receiving device in the embodiment of the present invention
Figure, the device include:
First receiving module 401, for receiving data transmitted by sending device；Wherein the data are sending device root
The MAC address of the receiving device obtained according to maximum message size and in advance is sent, the maximum message segment
Length is determined by the sending device according to the first maximum transmission unit MTU of sending device and the 2nd MTU of receiving device.
Optionally, described device further include:
Detection module, for detecting whether the data are segment data；
Recombination module, for by the data and belonging to same communication number when detecting the data is segment data
According to other segment datas recombinated.
Optionally, the detection module is used for, and is parsed to the data, when parsing obtains carrying in the data
When total length of data, communication identifier and fragment sequence number, determine that the data are segment data；Wherein, segment data is the hair
When the total length of data for sending equipment to obtain data to be sent in judgement is greater than the maximum message size, according to the maximum message segment
Length is segmented to obtain to the data to be sent, and the data of the data to be sent are carried in each segment data
Total length, with the corresponding communication identifier of data to be sent and fragment sequence number corresponding with the segment data；
The recombination module includes:
Acquiring unit, for obtaining and belonging to same lead to the data according to communication identifier entrained in the data
Other segment datas of letter data, wherein entrained in entrained communication identifier and the data in other described segment datas
Communication identifier it is identical；
Detection unit, for detecting communication belonging to the data according to total length of data entrained in the data
Whether data receive completely；
Recomposition unit, for when detect receive complete when, according to fragment sequence number entrained in the data and described
Entrained fragment sequence number, the data and other described segment datas are recombinated in other segment datas.
Optionally, described device further include:
First sending module, for fragment sequence number entrained in the data to be sent to the sending device, so that
Whether the sending device detects the receiving device and have received according to the fragment sequence number belongs to the institute of same communication data
There is segment data.
Optionally, described device further include:
Second receiving module, the message length negotiation information sent for receiving the sending device, wherein the message
The first MTU of the sending device is carried in length negotiations information, so that the receiving device is according to the first MTU and connects
2nd MTU of receiving unit determines maximum message size；
Second sending module, for according to the message length negotiation information, the 2nd MTU of receiving device to be sent to institute
Sending device is stated, so that the sending device determines the maximum message segment according to the first MTU and the 2nd MTU of sending device
Length.
In this way, data sink provided in this embodiment, receives sending device according to maximum by the first receiving module
The data that the MAC Address of message length and the receiving device obtained in advance is sent are realized direct logical based on data link layer
Letter realizes directly by reception of the hardware device to data, so as to avoid device operating system is relied in the prior art
The problem of middle network protocol stack carries out data transmission, and then avoid data transmission in the prior art and network in operating system is assisted
The dependence for discussing stack, reduces the requirement to hardware resource.
In addition, as shown in figure 5, being the entity structure schematic diagram of electronic equipment provided in an embodiment of the present invention, which sets
Standby may include: processor (processor) 510,520, memory communication interface (Communications Interface)
(memory) 530 and communication bus 540, wherein processor 510, communication interface 520, memory 530 pass through communication bus 540
Complete mutual communication.Processor 510 can call the meter that is stored on memory 530 and can run on processor 510
Calculation machine program, the method to execute the various embodiments described above offer, for example, obtain the first maximum transmission unit of sending device
MTU, and obtain the 2nd MTU of receiving device；According to the first MTU and the 2nd MTU, maximum message segment when determining data transmission is long
Degree；The MAC address of the receiving device obtained according to the maximum message size and in advance, by data to be sent
It is sent to the receiving device.
It or include: to receive data transmitted by sending device；Wherein the data are sending device according to maximum message segment
The MAC address of length and the receiving device obtained in advance is sent, and the maximum message size is described
Sending device is determined according to the first maximum transmission unit MTU of sending device and the 2nd MTU of receiving device.
In addition, the logical order in above-mentioned memory 530 can be realized by way of SFU software functional unit and conduct
Independent product when selling or using, can store in a computer readable storage medium.Based on this understanding, originally
Substantially the part of the part that contributes to existing technology or the technical solution can be in other words for the technical solution of invention
The form of software product embodies, which is stored in a storage medium, including some instructions to
So that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation of the present invention
The all or part of the steps of example the method.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. it is various
It can store the medium of program code.
The embodiment of the present invention also provides a kind of non-transient computer readable storage medium, is stored thereon with computer program,
The computer program is implemented to carry out the various embodiments described above offer method when being executed by processor, for example, obtain and send
First maximum transmission unit MTU of equipment, and obtain the 2nd MTU of receiving device；According to the first MTU and the 2nd MTU, number is determined
Maximum message size when according to transmission；The media access control of the receiving device obtained according to the maximum message size and in advance
Data to be sent are sent to the receiving device by MAC Address.
It or include: to receive data transmitted by sending device；Wherein the data are sending device according to maximum message segment
The MAC address of length and the receiving device obtained in advance is sent, and the maximum message size is described
Sending device is determined according to the first maximum transmission unit MTU of sending device and the 2nd MTU of receiving device.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (14)
1. a kind of data transmission method for uplink is applied to sending device characterized by comprising
The first maximum transmission unit MTU of sending device is obtained, and obtains the 2nd MTU of receiving device；
According to the first MTU and the 2nd MTU, maximum message size when data transmission is determined；
The MAC address of the receiving device obtained according to the maximum message size and in advance, by number to be sent
According to being sent to the receiving device.
2. the method according to claim 1, wherein the 2nd MTU for obtaining receiving device, comprising:
Obtain the MAC Address of the receiving device；
According to the MAC Address of the receiving device, Xiang Suoshu receiving device sends message length negotiation information, so that the reception
Equipment feeds back the 2nd MTU of the receiving device according to the message length negotiation information, wherein the message length negotiates letter
The first MTU of the sending device is carried in breath, so that the receiving device is according to the of the first MTU and receiving device
Two MTU determine maximum message size when data transmission；
Receive the 2nd MTU that the receiving device is fed back according to the message length negotiation information.
3. determining that data pass the method according to claim 1, wherein described according to the first MTU and the 2nd MTU
Maximum message size when defeated, comprising:
First MTU and the 2nd MTU are compared, determine the smaller MTU in the first MTU and the 2nd MUT；
Data packet length corresponding to the smaller MTU is determined as the maximum message size.
4. according to the maximum message size and in advance being obtained the method according to claim 1, wherein described
Data to be sent are sent to the receiving device by the MAC address of receiving device, comprising:
The total length of data of the data to be sent is obtained, and judges whether the total length of data of the data to be sent is greater than institute
State maximum message size；
When judgement obtains the total length of data less than or equal to the maximum message size, directly according to the receiving device
MAC Address, the data to be sent are sent to the receiving device；
When judgement obtains the total length of data greater than the maximum message size, according to the maximum message size, to institute
State data to be sent to be segmented, obtain multiple segment datas, and generate fragment sequence number corresponding with each segment data with
And communication identifier corresponding with the data to be sent；
According to the MAC Address of the receiving device, the multiple segment data is respectively sent to the receiving device, wherein often
The total length of data of the data to be sent is carried in a segment data, communication corresponding with the data to be sent is marked
Knowledge and fragment sequence number corresponding with the segment data.
5. according to the method described in claim 4, it is characterized in that, it is described the multiple segment data is respectively sent to it is described
After receiving device, the method also includes:
The receiving device is received after receiving multiple segment datas, entrained segmentation in each segment data fed back
Serial number；
Multiple fragment sequence numbers based on the received, detecting the receiving device, whether to have received the data to be sent opposite
All segment datas answered；Wherein,
When fragment sequence number phase one in multiple segment datas that received multiple fragment sequence numbers are divided with the data to be sent
When cause, determine that the receiving device has received all segment datas corresponding with the data to be sent.
6. a kind of data receiver method is applied to receiving device characterized by comprising
Receive data transmitted by sending device；Wherein the data are that sending device is obtained according to maximum message size and in advance
The MAC address of receiving device sent, the maximum message size is the sending device according to hair
The 2nd MTU of the first maximum transmission unit MTU and receiving device that send equipment are determined.
7. according to the method described in claim 6, it is characterized in that, after the data transmitted by the reception sending device,
The method also includes:
Detect whether the data are segment data；
When detecting the data is segment data, by the data with belong to other segment datas of same communication data into
Row recombination.
8. the method according to the description of claim 7 is characterized in that
Whether the detection data are segment data, comprising:
The data are parsed, when parsing obtains carrying total length of data, communication identifier and segmentation sequence in the data
Number when, determine the data be segment data；Wherein, segment data is that the sending device is judging to obtain data to be sent
When total length of data is greater than the maximum message size, according to the maximum message size, the data to be sent are divided
Section obtains, and the total length of data, opposite with the data to be sent of the data to be sent is carried in each segment data
The communication identifier answered and fragment sequence number corresponding with the segment data；
It is described to recombinate the data with other segment datas for belonging to same communication data, comprising:
According to communication identifier entrained in the data, other segments for belonging to same communication data with the data are obtained
According to wherein communication identifier entrained in other described segment datas is identical as communication identifier entrained in the data；
According to total length of data entrained in the data, detect whether communication data belonging to the data receives completely；
When detecting that reception is complete, taken according in fragment sequence number and other described segment datas entrained in the data
The fragment sequence number of band recombinates the data and other described segment datas.
9. according to the method described in claim 8, it is characterized in that, the determination data be segment data after, institute
State method further include:
Fragment sequence number entrained in the data is sent to the sending device, so that the sending device is according to described point
Section serial number detects whether the receiving device has received all segment datas for belonging to same communication data.
10. according to the method described in claim 6, it is characterized in that, before the data transmitted by the reception sending device,
The method also includes:
The message length negotiation information that the sending device is sent is received, wherein carrying in the message length negotiation information
The first MTU of sending device is stated, so that the receiving device determines most according to the 2nd MTU of the first MTU and receiving device
Big message length；
According to the message length negotiation information, the 2nd MTU of receiving device is sent to the sending device, so that the hair
Equipment is sent to determine the maximum message size according to the first MTU and the 2nd MTU of sending device.
11. a kind of data sending device is applied to sending device characterized by comprising
Module is obtained, for obtaining the first maximum transmission unit MTU of sending device, and obtains the 2nd MTU of receiving device；
Determining module, for determining maximum message size when data transmission according to the first MTU and the 2nd MTU；
Sending module, the media access control MAC of the receiving device for obtaining according to the maximum message size and in advance
Data to be sent are sent to the receiving device by location.
12. a kind of data sink is applied to receiving device characterized by comprising
First receiving module, for receiving data transmitted by sending device；Wherein the data are sending device according to maximum
The MAC address of message length and the receiving device obtained in advance is sent, and the maximum message size is
The sending device is determined according to the first maximum transmission unit MTU of sending device and the 2nd MTU of receiving device.
13. a kind of electronic equipment including memory, processor and stores the calculating that can be run on a memory and on a processor
Machine program, which is characterized in that the processor realizes such as data described in any one of claim 1 to 5 when executing described program
The step of the step of sending method or data receiver methods as described in any item such as claim 6 to 10.
14. a kind of non-transient computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer
It realizes when program is executed by processor such as the step of data transmission method for uplink described in any one of claim 1 to 5 or such as right
It is required that the step of 6 to 10 described in any item data receiver methods.
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| CN111817886A (en) * | 2020-06-29 | 2020-10-23 | 新华三信息安全技术有限公司 | Method and equipment for acquiring management object data |
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