CN109714135A - A kind of data pack transmission method and device - Google Patents
A kind of data pack transmission method and device Download PDFInfo
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- CN109714135A CN109714135A CN201811584257.0A CN201811584257A CN109714135A CN 109714135 A CN109714135 A CN 109714135A CN 201811584257 A CN201811584257 A CN 201811584257A CN 109714135 A CN109714135 A CN 109714135A
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Abstract
The invention discloses a kind of data pack transmission method and device, which includes: the byte number DP for obtaining the data packet that current time filters out and the total bytes serial number SS of current time sender transmission；The packet loss total bytes C and last moment sender that obtain the data packet filtered out before current time receive the serial number of the first confirmation message；Judge whether receive the confirmation message of recipient's transmission at current time；When the confirmation message for not receiving recipient's transmission at current time calculates the serial number of the second confirmation message according to the serial number of byte number DP, packet loss total bytes C and the first confirmation message；According to the second confirmation message of serial number gencration of the second confirmation message, and it is sent to sender.By applying the present invention, by the acknowledged sequence number for the confirmation message that modification recipient sends, after avoiding due to filtering out data packet, data sequence number is discontinuous after filtering out data packet in data transmission procedure, sender is caused to retransmit and disconnect.
Description
Technical field
The present invention relates to Data Matching computing technique fields, and in particular to a kind of data pack transmission method and device.
Background technique
Currently, with the continuous mixing together of industrialization and IT application process, more and more information technology applications are arrived
Industrial circle.At the same time, since general software and hardware and the network facilities, and and business administration is widely used in industrial control system
Information system integrates, and causes industrial control system more and more open, and and corporate intranet, even produced with internet
Data exchange.So opening the industry control fire prevention based on industry control bug excavation, and industrial white list for industrial control equipment
The industry controls safety equipment such as wall.
During data filtering, industry control safety equipment can do the operation abandoned for invalid data message, but logical
Crossing receiving end during industry control safety equipment carries out data transmission is to carry out byte-by-byte confirmation according to byte, so abandoning number
According to rear, data sequence number is simultaneously discontinuous, will lead to transmitting terminal and retransmits data, continues to abandon after re-transmission, dead material is thus formed one
Circulation, traditional way are disconnected after abandoning, and communicating pair is allowed to reconnect, but such mode has larger drawback,
First is that this process is very time-consuming, if it is used in the very high system of real-time, it is clear that improper；Second is possible to communication pair
Side also will continue to message failed before sending after not having reconnection mechanism or reconnection, result in whole system to occur in this way
It is chaotic.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of data pack transmission method and device, so as to realize logical
In the case that letter both sides do not turn off connection, the invalid data packet in transmission data is filtered out.
According in a first aspect, the embodiment of the invention provides a kind of data pack transmission methods, comprising: obtain current time filter
The total bytes serial number SS that the byte number DP for the data packet removed and current time sender send；It is filtered out before obtaining current time
Data packet packet loss total bytes C and last moment sender receive the serial number of the first confirmation message；Judge when current
The confirmation message for whether receiving recipient's transmission carved；When current time do not receive recipient transmission confirmation message, according to
The serial number of the byte number DP, the packet loss total bytes C and the first confirmation message calculate the serial number of the second confirmation message；Root
According to the second confirmation message of serial number gencration of the second confirmation message, and it is sent to sender.
With reference to first aspect, in first aspect first embodiment, the data packet that is filtered out before obtaining current time
Packet loss total bytes C and last moment sender receive the serial number of the first confirmation message after, judge be at current time
Before the no confirmation message for receiving recipient's transmission, the data pack transmission method further include: according to the byte number DP and
The total bytes serial number SS that the packet loss total bytes C modification current time sender sends, and it is sent to recipient.
With reference to first aspect, the data packet filtered out in first aspect second embodiment, before the current time
Packet loss total amount of byte C is calculated by the following formula to obtain:Wherein, C represent the current time it
Before the packet loss total amount of byte of data packet that filters out, n carries out the operation that n times filter out data packet, DP before representing current timeiIt represents
I-th filters out the byte number of data before current time, and i, n are positive integer.
With reference to first aspect, in first aspect third embodiment, according to the byte number DP, the total bytes C
With the serial number of the first confirmation message, the serial number of the second confirmation message is calculated, is calculated by the following formula to obtain: SR '=SR+
C+DP, wherein SR ' represents the serial number of the second confirmation message, and C represents the packet loss word of the data packet filtered out before the current time
Section sum, DP obtain the byte number for the data packet that current time filters out.
First embodiment with reference to first aspect, in the 4th embodiment of first aspect, according to the byte number DP and
The total bytes serial number SS for the data packet that the packet loss total bytes C modification current time sender sends, is by following public affairs
Formula modification: SS '=SS-C-DP, wherein SS ' represents the total bytes serial number for the data packet that modified sender sends, SS
Total bytes the serial number SS, C for representing the data packet of current time sender transmission represent the data packet filtered out before current time
The total amount of byte, DP represents the byte number for the data packet that current time filters out.
According to second aspect, the embodiment of the present invention provides a kind of data packet transfer device, comprising: first obtains module, uses
In the total byte number sequence for the data packet that the byte number DP and current time sender that obtain the data packet that current time filters out are sent
Number SS；Second obtains module, for obtaining the packet loss total bytes C and last moment hair of the data packet filtered out before current time
The side of sending receives the serial number of the first confirmation message；Judgment module, for judging whether receive recipient's transmission at current time
Confirmation message；Data computation module, for according to the byte number DP, the packet loss total bytes C and the first confirmation message
Serial number calculates the serial number of the second confirmation message；Message generation module, for true according to the serial number gencration second of the second confirmation message
Recognize message；And it is sent to sender.
In conjunction with second aspect, in second aspect first embodiment, further includes: serial number modified module, for according to institute
The total bytes serial number SS for the data packet that byte number DP and packet loss total bytes C modification current time sender sends is stated,
And the total bytes serial number SS ' that modified sender sends is sent to recipient.
According to the third aspect, the embodiment of the present invention provides a kind of computer equipment, comprising: memory and processor, it is described
Connection is communicated with each other between memory and the processor, computer instruction is stored in the memory, the memory is also
For storing the total amount of byte C of the data packet filtered out before current time, the processor, which passes through, executes the computer instruction,
Thereby executing data pack transmission method described in first aspect and first aspect any one embodiment.
According to fourth aspect, the embodiment of the present invention provides a kind of computer readable storage medium, described computer-readable to deposit
Storage media is stored with computer instruction, and for making, the computer executes first aspect to the computer instruction and first aspect is appointed
Data pack transmission method described in one embodiment.
Compared with prior art, the present invention has the following beneficial effects: the present invention passes through the transmission of modification recipient
Confirmation message serial number, the serial number for avoiding the confirmation message that sender receives and the byte number of transmission be not corresponding, leads to sender
Again the problem of transmitting data or disconnecting the connection with recipient；It does not need to disconnect in data transmission procedure, so that it may
To complete to filter out the operation of invalid data packet, so as to save the workload of plenty of time and calculating.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 shows the flow diagram of the data pack transmission method in the embodiment of the present invention；
Fig. 2 shows the structural block diagrams of the data packet transfer device in the embodiment of the present invention；
Fig. 3 shows the structural block diagram of the computer 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 skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
A kind of method for data packet transmission that this hair embodiment provides, can be applied in industrial control system based on TCP/IP
In the data transmission procedure of agreement, executed by the industry controls safety equipment such as firewall, as shown in Figure 1, the sender includes following step
It is rapid:
Step S101: in data transmission procedure, the industry controls safety equipment such as firewall obtains the data filtered out at current time
The total bytes serial number SS that the byte number DP of packet and current time sender send；
Step S102: the industry controls safety equipment such as firewall obtains the packet loss total byte of the data packet filtered out before current time
Number C and last moment sender receive the serial number of the first confirmation message；
Step S103:: the industry controls safety equipment such as firewall judges whether receive the confirmation of recipient's transmission at current time
Message；
Step S104: when the confirmation message for not receiving recipient's transmission at current time, illustrate that the industry controls such as firewall are pacified
Full equipment filters out the data packet of this transmission, and the industry controls such as firewall safety equipment is according to byte number DP, packet loss total bytes C and the
The serial number of one confirmation message calculates the serial number of the second confirmation message；When current time receive recipient transmission confirmation message,
Illustrate that recipient receives the data packet of sender's transmission.
Step S105: the serial number gencration for the second confirmation message that the industry controls such as firewall safety equipment is calculated according to above-mentioned steps
Second confirmation message, and it is sent to sender.
Optionally, in some embodiments of the present invention, the packet loss of the data packet filtered out before obtaining current time is total
Byte number C and last moment sender receive the serial number of the first confirmation message after, judge whether to receive at current time and connect
Before the confirmation message that debit sends, further includes: the industry controls such as firewall safety equipment is according to byte number DP and the total word of the packet loss
Joint number C modifies the total bytes serial number SS that current time sender sends, and is sent to recipient.
In data transmission procedure, the safety equipments such as firewall are after filtering out invalid data packet, word that recipient receives
Joint number and the byte number serial number that sender sends be not corresponding, will cause sender that can retransmit data or disconnect；In weight
Continue to abandon invalid data packet again during passing, form endless loop, will lead to whole system and cause confusion phenomenon；Sender with
Recipient re-establishes connection, will waste the plenty of time.The method of data packet transmission in through the embodiment of the present invention, in base
It can be avoided in the data transmission procedure of Transmission Control Protocol and the above problem occur.
Optionally, in some embodiment of the invention, the industry controls safety equipments such as firewall are obtained in step S102 current
The packet loss total amount of byte C of all data packets filtered out before moment, is calculated by the following formula to obtain:Wherein, C represents the packet loss total amount of byte of the data packet filtered out before the current time, and n represents current
The operation that n times filter out data packet, DP are carried out before momentiI-th filters out the byte number of data, i, n before representing current time
For positive integer.In practical applications, it can establish a counter, initial value is set as 0, filters out before to calculate current time
Data packet total amount of byte C value.
Optionally, in some embodiment of the invention, true according to byte number DP, total bytes C and first in step S102
Recognize the serial number of message, calculates the serial number of the second confirmation message, be calculated by the following formula to obtain: SR '=SR+C+DP,
In, SR ' represents the serial number of the second confirmation message, and C represents the packet loss total amount of byte of the data packet filtered out before the current time,
DP obtains the byte number for the data packet that current time filters out.
Optionally, in some embodiment of the invention, according to the byte number DP and the total word of the packet loss in step S104
Joint number C modifies the total bytes serial number SS for the data packet that current time sender sends, and is to be modified by following formula: SS
'=SS-C-DP, wherein SS ' represents the total bytes serial number for the data packet that modified sender sends, when SS represents current
Total bytes the serial number SS, C for carving the data packet that sender sends represent the byte of the data packet filtered out before current time
Sum, DP represent the byte number for the data packet that current time filters out.
Data pack transmission method in the embodiment of the present invention is embodied as follows: A equipment and B device three-way handshake are completed
Afterwards, two equipment of A and B can respectively account for a sequence because one TCP/IP of each transmission establishes the handshake (SYN) used when connection
Number, A equipment can send the data packet of 10 bytes, occupy 10 serial numbers, and B device returns after the data packet for receiving 10 bytes
The multiple serial number to the confirmation message of sender is 11；When A equipment sends the data packet of 10 bytes again, because of the number this time sent
It according to including invalid data, is filtered by safety equipments such as firewalls, B device does not just receive the data packet of A equipment transmission, just
Confirmation message will not be sent, at this point, if the safety equipments such as firewall do not do any operation, since A equipment does not receive B device
Confirmation message, A equipment and B device will disconnect.To avoid the occurrence of above situation, the data packet in the embodiment of the present invention is passed
Transmission method, the safety equipments such as firewall will generate the confirmation message of serial number 21, connect so that A equipment and B device be avoided to disconnect
It connects, and the total byte serial number 21 that A equipment is sent to B device is revised as 11 by the safety equipments such as firewall, to avoid B device
Data packet and the A equipment transmission total byte serial number for receiving 10 bytes be not corresponding, disconnects with A equipment.
The embodiment of the invention also provides a kind of data packet transfer devices, as shown in Fig. 2, the device includes: the first data
Module 1 is obtained, the total byte that the byte number DP and current time sender for obtaining the data packet that current time filters out are sent
Number sequence SS, detailed content can be found in the associated description of the step S101 of above method embodiment；Second data acquisition module 2,
The packet loss total bytes C and last moment sender for obtaining the data packet filtered out before current time receive the first confirmation message
Serial number, detailed content can be found in the associated description of the step S102 of above method embodiment；Judgment module 3, for judging
Whether current time receives the confirmation message of recipient's transmission, and detailed content can be found in the step S103's of above method embodiment
Associated description；Data computation module 4, for according to the byte number DP, the packet loss total bytes C and the first confirmation message
Serial number calculates the serial number of the second confirmation message；, the correlation that detailed content can be found in the step S104 of above method embodiment retouches
It states；Message generation module 5, for the second confirmation message of serial number gencration according to the second confirmation message, and by the second confirmation message
It is sent to sender, detailed content can be found in the associated description of the step S105 of above method embodiment.
Optionally, in some embodiment of the invention, data transmission device further include: serial number modified module 6 is used for root
According to the total bytes serial number for the data packet that the byte number DP and packet loss total bytes C modification current time sender sends
SS, and the total bytes serial number SS ' that modified sender sends is sent to recipient.
By implementing the data transmission device in the embodiment of the present invention, pass through the sequence for the confirmation message that modification recipient sends
Number, the serial number for the confirmation message that sender receives is corresponding with the byte number for the data packet that sender sends, and avoids transmission hair
Data are disconnected or transmitted again with recipient.
The embodiment of the invention also provides a kind of computer equipments, as shown in figure 3, the computer equipment may include processing
Device 71 and memory 72, wherein processor 71 can be connected with memory 72 by bus or other modes, to pass through in Fig. 3
For bus connection.
Processor 71 can be central processing unit (Central Processing Unit, CPU).Processor 71 can be with
For other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
The combination of the chips such as discrete hardware components or above-mentioned all kinds of chips.
Memory 72 is used as a kind of non-transient computer readable storage medium, can be used for storing non-transient software program, non-
Transient computer executable program and module, as the corresponding program instruction of data pack transmission method in the embodiment of the present invention/
Module is (for example, the first data acquisition module 1 shown in Fig. 2, the second data acquisition module 2, judgment module 3, data computation module
4, message generation module 5 and serial number modified module 6).The non-transient software that processor 71 is stored in memory 72 by operation
Program, instruction and module, thereby executing the various function application and data processing of processor, i.e. the realization above method is implemented
Data pack transmission method in example.
Memory 72 may include storing program area and storage data area, wherein storing program area can storage program area,
Application program required at least one function；It storage data area can the data etc. that are created of storage processor 71.In addition, storage
Device 72 may include high-speed random access memory, can also include non-transient memory, for example, at least a magnetic disk storage
Part, flush memory device or other non-transient solid-state memories.In some embodiments, it includes relative to place that memory 72 is optional
The remotely located memory of device 71 is managed, these remote memories can pass through network connection to processor 71.The reality of above-mentioned network
Example includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
One or more of modules are stored in the memory 72, when being executed by the processor 71, are executed
Data pack transmission method in embodiment as shown in Figure 1.
Optionally, in some embodiment of the invention, which further includes counter, the counter, based on
Calculate the total amount of byte of the data packet filtered out before current time；What memory 72 filtered out before being also used to store the current time
The total amount of byte of data packet.So as to the word for the data packet that the industry controls safety equipments such as firewall before saving current time filter out
Section sum.
It is that can lead to it will be understood by those skilled in the art that realizing all or part of the process in above-described embodiment method
Computer program is crossed to instruct relevant hardware and complete, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can for magnetic disk,
CD, read-only memory (Read-Only Memory, ROM), random access memory (Random Access
Memory, RAM), flash memory (Flash Memory), hard disk (Hard Disk Drive, abbreviation: HDD) or solid state hard disk
(Solid-State Drive, SSD) etc.；The storage medium can also include the combination of the memory of mentioned kind.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where various modifications and variations can be made, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (9)
1. a kind of data pack transmission method characterized by comprising
The total bytes serial number SS that the byte number DP and current time sender for obtaining the data packet that current time filters out are sent；
The packet loss total bytes C and last moment sender for obtaining the data packet filtered out before current time receive the first confirmation
The serial number of message；
Judge whether receive the confirmation message of recipient's transmission at current time；
When the confirmation message for not receiving recipient's transmission at current time, according to the byte number DP, the packet loss total byte
The serial number of number C and first confirmation message, calculate the serial number of the second confirmation message；
According to the second confirmation message of serial number gencration of second confirmation message, and it is sent to sender.
2. data pack transmission method according to claim 1, which is characterized in that the number filtered out before obtaining current time
After receiving the serial number of the first confirmation message according to the packet loss total bytes C and last moment sender of packet, judge when current
Before carving the confirmation message for whether receiving recipient's transmission, the data pack transmission method further include:
The total bytes serial number sent according to the byte number DP and packet loss total bytes C modification current time sender
SS, and it is sent to recipient.
3. data pack transmission method according to claim 1, which is characterized in that the data filtered out before the current time
The packet loss total amount of byte C of packet is calculated by the following formula to obtain:
Wherein, C represents the packet loss total amount of byte of the data packet filtered out before current time, and n represents the advance at current time
Row n times filter out the operation of data packet, DPiI-th filters out the byte number of data before representing current time, and i, n are positive integer.
4. data pack transmission method according to claim 1, which is characterized in that according to the byte number DP, total word
The serial number of joint number C and the first confirmation message calculate the serial number of the second confirmation message, are calculated by the following formula to obtain:
SR '=SR+C+DP,
Wherein, SR ' represents the serial number of second confirmation message, and C represents the described of the data packet filtered out before current time and loses
Packet byte sum, DP represent the byte number for the data packet that current time filters out.
5. data pack transmission method according to claim 2, which is characterized in that according to the byte number DP and the packet loss
Total bytes C modifies the total bytes serial number SS for the data packet that current time sender sends, and is modified by following formula:
SS '=SS-C-DP,
Wherein, SS ' represents the total bytes serial number for the data packet that modified sender sends, and SS represents current time sender
The total bytes serial number of the data packet of transmission, C represent the total amount of byte of the data packet filtered out before current time, and DP is represented
The byte number for the data packet that current time filters out.
6. a kind of data packet transfer device characterized by comprising
First obtains module, what the byte number DP and current time sender for obtaining the data packet that current time filters out were sent
The total bytes serial number SS of data packet；
Second obtains module, for obtaining the packet loss total bytes C and last moment hair of the data packet filtered out before current time
The side of sending receives the serial number of the first confirmation message；
Judgment module, for judging whether receive the confirmation message of recipient's transmission at current time；
Data computation module, for the serial number according to the byte number DP, the packet loss total bytes C and the first confirmation message,
Calculate the serial number of the second confirmation message；
Message generation module for the second confirmation message of serial number gencration according to the second confirmation message, and is sent to sender.
7. data packet transfer device according to claim 1, which is characterized in that further include:
Serial number modified module, for according to the byte number DP and packet loss total bytes C modification current time sender hair
The total bytes serial number SS for the data packet sent, and the total bytes serial number SS ' that modified sender sends is sent to reception
Side.
8. a kind of computer equipment characterized by comprising
Memory and processor communicate with each other connection, are stored in the memory between the memory and the processor
Computer instruction, the memory are also used to store the total amount of byte of the data packet filtered out before the current time, institute
Processor is stated by executing the computer instruction, thereby executing data packet according to any one of claims 1 to 5 transmission
Method.
9. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer to refer to
It enables, the computer instruction is for making the computer execute data packet transmission side according to any one of claims 1 to 5
Method.
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| CN201811584257.0A CN109714135B (en) | 2018-12-24 | 2018-12-24 | Data packet transmission method and device |
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| CN201811584257.0A CN109714135B (en) | 2018-12-24 | 2018-12-24 | Data packet transmission method and device |
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| CN112995192A (en) * | 2021-03-16 | 2021-06-18 | 深圳融安网络科技有限公司 | White list generation method, system, device and storage medium |
| CN114095129A (en) * | 2021-11-17 | 2022-02-25 | 厦门勇仕网络技术股份有限公司 | Communication method and system for mobile terminal game network transmission |
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| CN109714135B (en) | 2021-10-15 |
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