CN106534331A - Data transmission method and system based on dynamic port switching - Google Patents
Data transmission method and system based on dynamic port switching Download PDFInfo
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- CN106534331A CN106534331A CN201611078535.6A CN201611078535A CN106534331A CN 106534331 A CN106534331 A CN 106534331A CN 201611078535 A CN201611078535 A CN 201611078535A CN 106534331 A CN106534331 A CN 106534331A
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- 238000001514 detection method Methods 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 description 5
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
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Abstract
The invention discloses a data transmission method and system based on dynamic port switching. The method comprises the following steps that: a transmitting end and a receiving end establish a connection including a first source port, and the transmitting end sets a second source port; the transmitting end transmits a message to the receiving end through the first source port; and the transmitting end establishes a connection with the second source port and transmits the message when the connection between the transmitting end and the receiving end is disabled. In the data transmission method and system, an automatic 'connection disabling' detection mechanism and a dynamic port switching mechanism are adopted, so that the problem of limitation on connections by transmission link infrastructure can be solved effectively by the dynamic port switching mechanism; automatic reconnection after disconnection on the aspect of transmission protocol is realized; and data transmission stability is ensured. The data transmission method and system are completely transparent to an application layer.
Description
Technical field
The present invention relates to network transmission technology field, more particularly to a kind of data transmission method switched based on dynamic port
And system.
Background technology
With the continuous increase of internet scale, network environment also becomes to become increasingly complex, and people are to data transfer
Quality also requires that more and more higher.Super large file is transmitted, or is similar to the transmission of live this data flow, and transmission time is often held
The continuous some time, even need sometimes to take several days.Under this scene, transmitting terminal is with receiving terminal by setting up a transmission control
Agreement (TCP) connection carries out data transmission, if the transmission link for being relied on is unstable, biography occurs in document transmission process
The problems such as defeated interruption failure, live picture interim card, have a strong impact on Consumer's Experience.
Data transfer of the prior art under the severe and network environments of complexity such as similar transnational or cross operator is usually
Face problems with：
(1) connection is prohibited suddenly problem：Due to the data packet sending speed too fast or transmission bandwidth of transmission control protocol
Than larger, the punitive measures of some infrastructure in transmission link is triggered, cause this connection to be prohibited, data transfer
Interrupt.
(2) disconnection reconnecting and breakpoint transmission cost are done than larger by application layer：The recovery technology of conventional meanses is more multiple
It is miscellaneous, and technology application has been limited, not can recover under all situations.
The content of the invention
In order to solve problem of the prior art, a kind of data biography switched based on dynamic port is embodiments provided
Transmission method and system.The technical scheme is as follows：
On the one hand, a kind of data transmission method switched based on dynamic port, is comprised the following steps：
Transmitting terminal and receiving terminal set up the connection comprising the first source port, and then transmitting terminal arranges the second source port；
Transmitting terminal sends message to receiving terminal by the first source port；
When transmitting terminal is connected with receiving terminal to be prohibited, transmitting terminal is set up by the second source port and receiving terminal and is connected concurrent
Deliver newspaper text.
Further, transmitting terminal and receiving terminal set up the connection comprising the first source port, and then transmitting terminal arranges the second source
The concrete steps of port include：
Transmitting terminal is set up with receiving terminal by transmission control protocol and is connected, and transmission control protocol is uniquely marked by four-tuple
Show connection, four-tuple includes source internet protocol address, the first source port, purpose Internet protocol address and destination interface；
Transmitting terminal selects new port as the second source port；
Transmitting terminal constructs message, and the second source port information is encapsulated in messages, reception is sent to by the first source port
End；
After receiving terminal receives the message containing the second source port information, the second source port information is parsed, construct port
Confirmation message, is sent to transmitting terminal.
Further, transmitting terminal construction message, the second source port information is encapsulated in messages, is sent out by the first source port
The concrete steps for giving receiving terminal include：
Transmitting terminal constructs message, and the second source port information is encapsulated in messages, reception is sent to by the first source port
End；
Transmitting terminal starts timer, sets timing threshold as T, the port confirmation message for waiting receiving terminal to reply；
If port confirmation message is not received in timing threshold T, retransmit message.
Further, transmitting terminal is included to the concrete steps that receiving terminal sends message by the first source port：
Transmitting terminal arranges transmission times count value for each message to be sent, and transmission times count value initial value is set to 0,
Message to be sent often sends once, and transmission times count value increases by 1；
Transmitting terminal sends message to receiving terminal by the first source port.
Further, when transmitting terminal is connected with receiving terminal to be prohibited, transmitting terminal is built by the second source port and receiving terminal
The vertical concrete steps for connecting and sending message include：
Whether transmitting terminal judges that transmitting terminal is connected with receiving terminal and is prohibited；
If connection is not prohibited, transmitting terminal continues through the first source port and sends message to receiving terminal；
If connection is prohibited, port handover mechanism is triggered, transmitting terminal is sent out to receiving terminal again by the second source port
Deliver newspaper text.
Further, transmitting terminal judges that transmitting terminal is connected with receiving terminal whether forbidden concrete steps include：
Transmitting terminal judges whether message sends successfully；
If sending successfully, transmitting terminal is connected with receiving terminal and is not prohibited；
If transmission is unsuccessful, judge the transmission times count value of message whether more than preset value；
If transmission times count value is less than or equal to preset value, transmitting terminal is connected with receiving terminal and is not prohibited；
If transmission times count value is more than preset value, transmitting terminal is connected with receiving terminal and is prohibited.
Further, if connection is prohibited, port handover mechanism is triggered, transmitting terminal is by the second source port to reception
End resends message and concretely comprises the following steps：First source port is changed to the second source port by transmitting terminal, then by the second source
Mouth is set up with receiving terminal and is connected and sends message, and the four-tuple of unique sign connection is source internet protocol address, the second source
Mouth, purpose Internet protocol address and destination interface.
On the other hand, a kind of data transmission system switched based on dynamic port, including transmitting terminal and receiving terminal, transmitting terminal
Connected by transmission control protocol with receiving terminal；
Transmitting terminal includes：
Port backup module, for arranging the second source port in transmitting terminal, and carries out source port switching；
First transceiver module, is connected with port backup module, for sending message to receiving terminal, and receives receiving terminal return
Reply message；
Receiving terminal includes：
Second transceiver module, is connected with the first transceiver module, for the message that receiving end/sending end sends, and is sent out to transmitting terminal
Send multiple message back to.
Further, transmitting terminal also includes：
Connection status module, is connected with the first transceiver module, for judging the connection status of transmitting terminal and receiving terminal.
Further, connection status module is specifically included：
Packet counting module, is connected with the first transceiver module, is counted for the transmission times to each message；
Condition judgment module, is connected with packet counting module, for being judged transmitting terminal and being connect by the transmission times of message
The connection status of receiving end.
Further, the judgment rule of condition judgment module is：
When the transmission times of message is less than or equal to preset value, judge that transmitting terminal is connected normally with receiving terminal；
When the transmission times of message is more than preset value, judges transmitting terminal and receiving terminal disconnecting or be prohibited.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：The present invention includes that " connection is forbidden " is examined automatically
Survey mechanism and dynamic port handover mechanism." connection is forbidden " automatic detection mechanism by recording the weight of each packet in transmitting terminal
Number of times is passed, when a packet number of retransmissions reaches certain threshold values, judges that connection is prohibited.Dynamic port handover mechanism be
When transmitting terminal and receiving terminal set up a connection, both sides can consult out a new source port, as backup port,
Exactly one is connected with two four-tuples.Under normal circumstances, all data are all transmitted by one of four-tuple, when passing through
When " connection is forbidden " automatic detection mechanism finds to have the forbidden situation of connection to occur, it is switched in another four-tuple and transmits
Data, and renegotiate out a new four-tuple.The present invention, can be effective by the mechanism of this dynamic conversion port
Solve the problems, such as that transmission link infrastructure is limited to connection, realize that the connection in host-host protocol aspect is broken automatically again
Even, it is fully transparent to application layer, and ensure the stability of data transfer.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the data transmission method flow chart switched based on dynamic port that the embodiment of the present invention one is provided；
Fig. 2 is the data transmission method flow chart switched based on dynamic port that the embodiment of the present invention one is provided；
Fig. 3 is the tool of step S207 in the data transmission method based on dynamic port switching that the embodiment of the present invention one is provided
Body flow chart；
Fig. 4 is the data transmission system structure chart switched based on dynamic port that the embodiment of the present invention two is provided；
Fig. 5 is the data transmission system structure chart switched based on dynamic port that the embodiment of the present invention two is provided；
Fig. 6 is the data transmission system structure chart switched based on dynamic port that the embodiment of the present invention two is provided.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
The present invention provides a kind of data transmission method switched based on dynamic port, as shown in figure 1, comprising the following steps：
S101, transmitting terminal and receiving terminal set up the connection comprising the first source port, and then transmitting terminal arranges the second source port；S102, sends out
Sending end sends message to receiving terminal by the first source port；S103, when transmitting terminal is connected with receiving terminal to be prohibited, transmitting terminal leads to
Cross the second source port and set up with receiving terminal and be connected and send message.
Specifically, as shown in Figure 2：
Step S201, transmitting terminal are set up with receiving terminal by transmission control protocol (TCP) and are connected.Transmitting terminal is touched with receiving terminal
Transmission control three-way handshake mechanism is sent out, after transmission control three-way handshake success, a transmission control four-tuple, transmission control is set up
Agreement processed uniquely indicates connection by four-tuple.Four-tuple includes source internet protocol address, the first source port, purpose interconnection
FidonetFido address and destination interface.
Step S202, transmitting terminal selection port is used as the second source port.Transmitting terminal selects one by transmission control protocol
New port is used as the second source port.Standby port of second source port as the first source port, when the connection of the first source port
When being prohibited, the second source port can be directly enabled.
Step S203, transmitting terminal construction message, the second source port information is encapsulated in messages, is sent out by the first source port
Give receiving terminal.Transmitting terminal constructs a message, the second source port information is encapsulated in messages, is sent by the first source port
To receiving terminal；Transmitting terminal starts timer simultaneously, sets timing threshold as T, the port confirmation message for waiting receiving terminal to reply；Such as
Fruit does not receive port confirmation message in timing threshold T, then retransmit message, and message at most retransmits three times.T=2 × RTT, RTT
For the data round-trip delay of transmitting terminal and receiving terminal.
Step S204, after receiving terminal receives the message containing the second source port information, parses the second source port information,
Construction port confirmation message, is sent to transmitting terminal.The information of the second source port after receiving terminal receives message, is parsed, and is constructed
Port confirmation message, is sent to transmitting terminal, and now receiving terminal can receive the message from the second source port, and as from
The Message processing of one source port.
Step S205, transmitting terminal arrange transmission times count value for each message to be sent.Transmission times count value is initial
Value is set to 0, and message to be sent often sends once, and transmission times count value increases by 1.
Step S206, transmitting terminal send message to receiving terminal by the first source port.
Whether step S207, judge that transmitting terminal is connected with receiving terminal and be prohibited.If connection is not prohibited, execution step
S208, if connection is prohibited, execution step S209.
Step S208, transmitting terminal continue through the first source port and send message to receiving terminal；
Step S209, triggers port handover mechanism, and transmitting terminal resends message to receiving terminal by the second source port.Send out
First source port is changed to the second source port by sending end, is then set up with receiving terminal by the second source port and is connected, and repeats to walk
The step of rapid S202 to S209, sends message to receiving terminal.Now the four-tuple of unique sign connection is source internet protocol ground
Location, the second source port, purpose Internet protocol address and destination interface.
Specifically, step S207, judges that transmitting terminal is connected with receiving terminal whether forbidden concrete steps are as shown in Figure 3：
Step S2071, transmitting terminal judge whether message sends successfully.If the message sends successfully, transmitting terminal with connect
Receiving end connection is normal, and the message is sent after terminating, execution step S208, continues to send next message；If the message sends
Failure, then carry out step S2072.
Whether step S2072, judge the transmission times count value of message more than preset value.Typically by transmission times count value
10 are preset as, the present invention is not construed as limiting to this.If transmission times count value≤10, judge that transmitting terminal is connected not with receiving terminal
It is prohibited, return to step S206；If transmission times count value ＞ 10, judge that transmitting terminal is connected with receiving terminal and be prohibited, enter
Row step S209.
The maximum bandwidth for assuming link is M, and file size is N, then file transmission time T=N/M in theory, if maximum
Time Tmax=3 × T, when the file transmission time that a size is N is more than Tmax, then it is assumed that be a transmission " high point ".
In actual environment, Sichuan telecommunications is moved to from Guangzhou, transmit the file of 100M, bandwidth is 3MB/s, transmitted 100 times, using this
Before invention, high point rate is 56%, and after use, high point rate will be 12%.
The present invention includes " connection is forbidden " automatic detection mechanism and dynamic port handover mechanism." connection is forbidden " automatic detection
Mechanism by the number of retransmissions of each packet is recorded in transmitting terminal, when a packet number of retransmissions reaches certain threshold values,
Judge that connection is prohibited.Dynamic port handover mechanism is that both sides can assist when transmitting terminal and receiving terminal set up a connection
Business's out new source port, used as backup port, that is, one is connected with two four-tuples.Under normal circumstances, own
Data are all transmitted by one of four-tuple, connect forbidden feelings when finding to have by " connection is forbidden " automatic detection mechanism
When condition occurs, another four-tuple transmitting data is switched to, and renegotiates out a new four-tuple.The present invention passes through
The mechanism of this dynamic conversion port, can effectively solve the problems, such as that transmission link infrastructure is limited to connection,
The automatic disconnection reconnecting of connection in host-host protocol aspect is realized, it is fully transparent to application layer, and ensure the stability of data transfer.
Embodiment two
The present invention also provides a kind of data transmission system switched based on dynamic port, as shown in figure 4, including transmitting terminal
100 and receiving terminal 200, transmitting terminal 100 and receiving terminal 200 are connected by transmission control protocol.
Specifically,
Transmitting terminal 100 includes：First transceiver module 101 and port backup module 102.
Receiving terminal 200 includes：Second transceiver module 201.
Port backup module 102 is for arranging backup source port in transmitting terminal 100, and carries out source port switching；First receives
Send out module 101 to be connected with port backup module 102, for message being sent to receiving terminal 200, and receive the return of receiving terminal 200
Reply message；Second transceiver module 201 is connected with the first transceiver module 101, for the message that receiving end/sending end 100 sends, and
Send to transmitting terminal 100 and reply message.
As shown in figure 5, transmitting terminal 100 also includes connection status module 103, it is connected with the first transceiver module 101, for sentencing
The connection status of disconnected transmitting terminal and receiving terminal.
As shown in fig. 6, connection status module 103 is specifically included：Packet counting module 1031 and condition judgment module 1032.
Packet counting module 1031 is connected with the first transceiver module 101, is counted for the transmission times to each message；Shape
State judge module 1032 is connected with packet counting module 1031, for being judged transmitting terminal 100 and being connect by the transmission times of message
The connection status of receiving end 200.The judgment rule of condition judgment module 1032 is：When the transmission times of message is less than or equal to preset value
When, judge that transmitting terminal 100 is connected normally with receiving terminal 200；When the transmission times of message is more than preset value, transmitting terminal is judged
100 with 200 disconnecting of receiving terminal or be prohibited.General transmission times preset value is 10, and the present invention is not construed as limiting to this.
The transmitting terminal part of the as shown in Figure 4 data transmission system switched based on dynamic port, can be used as a kind of single
Only data transmission device.The device can be router, or switch or other devices, be also used as server
A part for composition structure, installs in the server.The present invention will not be described here.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Device embodiment described above is only schematic, wherein the unit as separating component explanation can
To be or may not be physically separate, as the part that unit shows can be or may not be physics list
Unit, you can local to be located at one, or can also be distributed on multiple NEs.Which is selected according to the actual needs can
In some or all of module realizing the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, you can to understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
By software plus required general hardware platform mode realizing, naturally it is also possible to by hardware.Based on such understanding, on
State the part that technical scheme substantially contributes prior art in other words to embody in the form of software product, should
Computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disc, CD etc., including some fingers
Order is used so that a computer equipment (can be personal computer, server, or network equipment etc.) performs each enforcement
Method described in some parts of example or embodiment.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (11)
1. it is a kind of based on dynamic port switch data transmission method, it is characterised in that comprise the following steps：
Transmitting terminal and receiving terminal set up the connection comprising the first source port, and then the transmitting terminal arranges the second source port；
The transmitting terminal sends message to the receiving terminal by first source port；
When the transmitting terminal is connected with the receiving terminal to be prohibited, the transmitting terminal is connect with described by second source port
Receiving end is set up and connects and send message.
2. the as claimed in claim 1 data transmission method switched based on dynamic port, it is characterised in that the transmitting terminal and
Receiving terminal sets up the connection comprising the first source port, and then the concrete steps of the second source port of the transmitting terminal setting include：
The transmitting terminal is set up with the receiving terminal by transmission control protocol and is connected, and the transmission control protocol passes through four-tuple
Uniquely to indicate the connection, the four-tuple includes source internet protocol address, first source port, purpose internet protocol
View address and destination interface；
The transmitting terminal selects new port as second source port；
The transmitting terminal constructs message, and second source port information is encapsulated in the message, is sent out by the first source port
Give the receiving terminal；
After the receiving terminal receives the message containing second source port information, second source port information is parsed,
Construction port confirmation message, is sent to the transmitting terminal.
3. the data transmission method for being switched based on dynamic port as claimed in claim 2, it is characterised in that the transmitting terminal structure
Message is made, second source port information is encapsulated in the message, the receiving terminal is sent to by the first source port
Concrete steps include：
The transmitting terminal constructs message, second source port information is encapsulated in the message, by first source
Mouth is sent to the receiving terminal；
The transmitting terminal starts timer, sets timing threshold as T, the port confirmation message for waiting the receiving terminal to reply；
If the port confirmation message is not received in timing threshold T, the message is retransmitted.
4. the data transmission method for being switched based on dynamic port as claimed in claim 3, it is characterised in that the transmitting terminal leads to
Crossing first source port includes to the concrete steps that the receiving terminal sends message：
The transmitting terminal arranges transmission times count value for each message to be sent, and the transmission times count value initial value is arranged
For 0, the message to be sent often sends once, and the transmission times count value increases by 1；
The transmitting terminal sends message to the receiving terminal by first source port.
5. as described in any one of Claims 1 to 4 based on dynamic port switch data transmission method, it is characterised in that when
The transmitting terminal is connected with the receiving terminal when being prohibited, and the transmitting terminal is built by second source port and the receiving terminal
The vertical concrete steps for connecting and sending message include：
Whether the transmitting terminal judges that the transmitting terminal is connected with the receiving terminal and is prohibited；
If the connection is not prohibited, the transmitting terminal continues through first source port and sends report to the receiving terminal
Text；
If the connection is prohibited, port handover mechanism is triggered, the transmitting terminal is by second source port to described
Receiving terminal resends the message.
6. the data transmission method for being switched based on dynamic port as claimed in claim 5, it is characterised in that the transmitting terminal is sentenced
The transmitting terminal that breaks is connected with the receiving terminal whether forbidden concrete steps include：
The transmitting terminal judges whether the message sends successfully；
If sending successfully, the transmitting terminal is connected with the receiving terminal and is not prohibited；
If transmission is unsuccessful, judge the transmission times count value of the message whether more than preset value；
If the transmission times count value is less than or equal to preset value, the transmitting terminal is connected not banned with the receiving terminal
Only；
If the transmission times count value is more than preset value, the transmitting terminal is connected with the receiving terminal and is prohibited.
7. the data transmission method for being switched based on dynamic port as claimed in claim 6, it is characterised in that if described
Connection is prohibited, then trigger port handover mechanism, and the transmitting terminal is sent out to the receiving terminal again by second source port
The message is sent to concretely comprise the following steps：First source port is changed to second source port by the transmitting terminal, is then passed through
Second source port is set up with the receiving terminal and is connected and sends message, and the four-tuple for uniquely indicating the connection is the source
Internet protocol address, second source port, the purpose Internet protocol address and the destination interface.
8. a kind of data transmission system switched based on dynamic port, including transmitting terminal and receiving terminal, the transmitting terminal and reception
End is connected by transmission control protocol, it is characterised in that：
The transmitting terminal includes：
Port backup module, for arranging the second source port in the transmitting terminal, and carries out source port switching；
First transceiver module, is connected with the port backup module, for sending message to the receiving terminal, and is connect described in receiving
The reply message that receiving end is returned；
The receiving terminal includes：
Second transceiver module, is connected with first transceiver module, for receiving the message that the transmitting terminal sends, and to described
Transmitting terminal sends replys message.
9. the data transmission system for being switched based on dynamic port as claimed in claim 8, it is characterised in that the transmitting terminal is also
Including：
Connection status module, is connected with first transceiver module, for judging the connection of the transmitting terminal and the receiving terminal
State.
10. the data transmission system for being switched based on dynamic port as claimed in claim 9, it is characterised in that the connection shape
Morphotype block is specifically included：
Packet counting module, is connected with first transceiver module, is counted for the transmission times to each message；
Condition judgment module, is connected with the packet counting module, judges described sending out for the transmission times by the message
The connection status of sending end and the receiving terminal.
11. data transmission systems switched based on dynamic port as claimed in claim 10, it is characterised in that the state is sentenced
The judgment rule of disconnected module is：
When the transmission times of the message is less than or equal to preset value, judge that the transmitting terminal is connected normally with the receiving terminal；
When the transmission times of the message is more than preset value, judge the transmitting terminal with the receiving terminal disconnecting or banned
Only.
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| CN201611078535.6A CN106534331B (en) | 2016-11-30 | 2016-11-30 | A kind of data transmission method and system based on dynamic port switching |
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| CN201611078535.6A CN106534331B (en) | 2016-11-30 | 2016-11-30 | A kind of data transmission method and system based on dynamic port switching |
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| CN106534331B CN106534331B (en) | 2019-10-11 |
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| CN110710166A (en) * | 2017-06-14 | 2020-01-17 | 住友电气工业株式会社 | Switching device, communication control method, and communication control program |
| CN111585883A (en) * | 2019-02-18 | 2020-08-25 | 中兴通讯股份有限公司 | Link aggregation port switching method, network equipment and computer storage medium |
| CN111585883B (en) * | 2019-02-18 | 2023-03-24 | 中兴通讯股份有限公司 | Link aggregation port switching method, network equipment and computer storage medium |
| CN114567416A (en) * | 2022-04-06 | 2022-05-31 | 西安羚控电子科技有限公司 | TCP-based data transmission verification-free method and system |
| CN114567416B (en) * | 2022-04-06 | 2024-06-07 | 西安羚控电子科技有限公司 | TCP-based data transmission verification-free method and system |
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