CN108092993A - A kind of network data transmission control method and system - Google Patents
A kind of network data transmission control method and system Download PDFInfo
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- CN108092993A CN108092993A CN201711479081.8A CN201711479081A CN108092993A CN 108092993 A CN108092993 A CN 108092993A CN 201711479081 A CN201711479081 A CN 201711479081A CN 108092993 A CN108092993 A CN 108092993A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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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
- H04L67/01—Protocols
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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
- H04L67/141—Setup of application sessions
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- Computer Security & Cryptography (AREA)
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Abstract
The invention discloses a kind of network data transmission control method and systems, by opening two sockets services ends at the service network end of fire wall one side, two socket clients are opened at the customer network end of opposite side, then establish TCP links using the permitted mode of fire wall.When needing the target device of inverted access customer network end, after connection is established at the service network end equipment and second service end, the connection with target device is established by first service end, the TCP pre-established links, first the second client of client notification, after connection is successfully established, the equipment connection of counter-notification service network end is successfully established, and allows to transmit data, you can access, the time is saved using facilitating, and the timeliness of data will not be reduced.It is no different so that these need reversely to establish for the equipment of connection with the access in the network that is directly limited in no fire wall, and data link is established by using bottom Transmission Control Protocol, it can be to avoid the interception of fire wall.
Description
Technical field
The present invention relates to field of communication technology, more particularly to a kind of network data transmission control method and system.
Background technology
In two or more independent or relatively independent networks, in order to ensure security of single network environment etc.
Reason can make the equipment in some internal network (customer network end) that can only actively access external network (service network end) equipment
And external network (service network end) equipment cannot be allowed to access the equipment in internal network (customer network end), when because of a variety of causes
When can not change the access rule of these networks, this reverse link communication can be accomplished by the following way：
1. redesign and realize the network access mode between these equipment, the equipment of external network (service network end)
Internal network (customer network end) is not visited again, but some intermediary information being stored in external network (service network end)
In equipment, internal network (customer network end) periodically goes to access this mediation device, and data therefrom does corresponding processing again
Result is stored in this mediation device afterwards, then the equipment of external network (service network end) is periodically or by manually triggering
Result data is obtained on mediation device.
2. reverse link communication is realized by SSH (Secure Shell- safety shell protocols), it is necessary in external network (service
Network-side) it installs and enables SSH services, internal network (customer network end) is connected external using ssh client by SSH agreements
Network (service network end), the reverse link communication function of being carried by SSH realize reverse link communication.
But redesign and realize the network access mode of equipment room, it is necessary to take a significant amount of time, and these can be made
The communication of equipment room is turned into non real-time asynchronous communication from real-time Communication for Power, so as to which the timeliness of data be caused to decline.And it relies on
When SSH realizes reverse link communication, the fire wall of internal network and external network can disable SSH agreements in some cases, then this side
Formula can not just use.
Therefore, the equipment that how enabling can only unidirectionally establish between the heterogeneous networks that connection communicates realizes reversed master
It is dynamic to access, the time is saved using facilitating, and the timeliness of data will not be reduced, it is that those skilled in the art need to solve at present
Technical problem.
The content of the invention
The object of the present invention is to provide a kind of network data transmission control method and systems, can unidirectionally to establish
Actively access can be realized reversely by connecting the equipment between the heterogeneous networks to communicate, saved the time using facilitating, and will not be dropped
The timeliness of low data.
In order to solve the above technical problems, the present invention provides following technical solutions：
A kind of network data transmission control method, including：
Two sockets services ends for communicating connection are opened in service network end, are respectively defined as first service end
With second service end；
Two socket clients for communicating connection are opened in customer network end, are respectively defined as the first client
With the second client；
Pre-establish first client and TCP data link that the first service end is communicatively coupled；
The access request of service network end equipment is obtained by the second service end；
The access request is sent to by first client by the first service end and the TCP data link
End, and the access request is sent to by second client by first client；
By second client according to preconfigured destination address and the corresponding target device of the access request
Establish connection；
By first client, the TCP data link, the first service end and the second service end by institute
The successful connection information for stating the second client feedback is sent to service network end equipment；
Access action is performed, carries out service network end equipment and the data communication of the target device.
Preferably, further include：
Judge whether the TCP data link fails；
If so, it closes and abandons the TCP data link；
A TCP data link is rebuild between first client and the first service end.
Preferably, it is described to judge whether the TCP data link fails, including：
Judge whether the data transmission in the TCP data link is overtime；
If so, the TCP data link is removed from effective TCP data link pond by the first service end；
Default fixed news in the first service end are sent by the TCP data link to first client
End；
Judge whether message that first client receives is the default fixation that the first service end is sent
Message；
If so, the default fixed news are beamed back into the first service end by the TCP data link；
Judge whether message that first service termination receives is the default fixation that first client is beamed back
Message；
If so, judging that the TCP data link does not fail, and the TCP data link is returned to effective TCP
Data link pond；
If it is not, then judge the TCP data link failure.
Preferably, it is described to judge whether the TCP data link fails, it further includes：
Default fixed news in the first service end are being sent by the TCP data link to the described first visitor
After the end of family, judge whether the first service end is received by the TCP data link in default first time threshold value
The default fixed news beamed back to first client；
If it is not, then judge the TCP data link failure.
Preferably, it is described to judge whether the TCP data link fails, it further includes：
After the data transmission time-out in judging the TCP data link, judge in default second time threshold
The default fixation whether first client receives the first service end transmission by the TCP data link disappears
Breath；
If it is not, judge the TCP data link failure.
A kind of network data transmission control system, including：Service network end and customer network end, the service network end bag
Two sockets services ends for communicating connection are included, are respectively defined as first service end and second service end；Client's net
Network end includes two socket clients for communicating connection, is respectively defined as the first client and the second client；
First client is used to pre-establish first client and the first service end is communicatively coupled
TCP data link；
The second service end is used to obtain the access request of service network end equipment；
The TCP data link is used to the access request being transmitted to first client, will pass through described the
The access request is sent to second client by one client；
Second client is used for according to preconfigured destination address and the corresponding target device of the access request
Establish connection；
The TCP data link is additionally operable to the successful connection information of customer network end feedback being transmitted to the service
Network-side so that the successful connection information is sent to service network end equipment, triggers the service network end
Equipment performs access action.
Preferably, further include：
Overtime chain rupture processor for judging whether the TCP data link fails, and is judging the TCP data chain
Road, which is closed when failing and abandons the TCP data link and trigger first client, rebuilds a TCP data link.
Compared with prior art, above-mentioned technical proposal has the following advantages：
A kind of network data transmission control method that the embodiment of the present invention is provided, passes through the service network in fire wall one side
Two sockets services ends are opened at network end, open two socket clients at the customer network end of fire wall opposite side, then
Using the permitted mode of fire wall, i.e. TCP links are established in the direction at the first client to first service end, and keep available.
Wherein, when service network end, equipment needs to access the target device of customer network end, the service network end equipment and the
After two server-sides establish connection, by the internal communication notification first service end at service network end, first service end passes through advance
The TCP links of foundation notify the first client, the second client of internal communication notification that the first client passes through customer network end
The connection with target device is established, after connection is successfully established, equipment connection in counter-notification service network end is successfully established, and is allowed
Data are transmitted, can then be accessed, be saved the time using facilitating, and the timeliness of data will not be reduced.Can only be unidirectional
It establishes in the network of TCP connection, when reversely foundation is needed to connect and transmits data, it is not necessary to modify the network access modes of equipment
Normal data communication is reached so that these need reversely to establish for the equipment of connection with directly limiting in no fire wall
Network in access be no different, and data link is established by using bottom Transmission Control Protocol, can be to avoid the interception of fire wall.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
The network data transmission control method flow chart that Fig. 1 is provided for a kind of specific embodiment of the present invention；
The network data transmission control system architecture schematic diagram that Fig. 2 is provided for a kind of specific embodiment of the present invention.
Specific embodiment
The core of the present invention is to provide a kind of network data transmission control method and system, can unidirectionally to establish
Actively access can be realized reversely by connecting the equipment between the heterogeneous networks to communicate, saved the time using facilitating, and will not be dropped
The timeliness of low data.
It is understandable in order to which the above objects, features and advantages of the present invention is enable to become apparent, below in conjunction with the accompanying drawings to this hair
Bright specific embodiment is described in detail.
Detail is elaborated in the following description in order to fully understand the present invention.But the present invention can with it is a variety of not
Other manner described here is same as to implement, those skilled in the art can do class without violating the connotation of the present invention
Like popularization.Therefore the limitation of the invention from following public specific embodiment.
It please refers to Fig.1, the network data transmission control method flow that Fig. 1 is provided for a kind of specific embodiment of the present invention
Figure.
A kind of specific embodiment of the present invention provides a kind of network data transmission control method, including：
S11：Two sockets services ends for communicating connection are opened in service network end, are respectively defined as the first clothes
Business end and second service end.
So-called socket, that is, Socket, the sockets services end in consolidated network end can mutually transmit data.
S12：Two socket clients for communicating connection are opened in customer network end, are respectively defined as the first visitor
Family end and the second client.
In the present embodiment, service network end and customer network end are two network rings for being respectively at fire wall both sides
Border, wherein, the permitted forward manner of fire wall can actively initiate request and service network end for customer network end equipment
Side apparatus, which is established, to be connected and communicates.
S13：Pre-establish the first client and TCP data link that first service end is communicatively coupled.
In the present embodiment, so-called TCP data link is that the Transmission Control Protocol (transmission control protocol) based on transport layer is built
Vertical first client and the link at first service end, are intercepted to avoid application layer protocol is used by fire wall.Due to fire wall
Permitted forward manner can actively initiate request for customer network end equipment and establish connection with service network end equipment
And communicate, therefore, in the present embodiment, actively established TCP data with first service end by the first client and linked.
S14：The access request of service network end equipment is obtained by second service end.
S15：Access request is sent to by the first client by first service end and TCP data link, and passes through first
Access request is sent to the second client by client.
S16：It is established by the second client according to preconfigured destination address and the corresponding target device of access request
Connection.
S17：By the first client, TCP data link, first service end and second service end by the second client feedback
Successful connection information be sent to service network end equipment.
S18：Access action is performed, carries out service network end equipment and the data communication of target device.
By opening two sockets services ends at the service network end of fire wall one side, in the client of fire wall opposite side
Network-side opens two socket clients, then using the permitted mode of fire wall, i.e. the first client to first service
TCP links are established in the direction at end, and keep available.Wherein, when service network end, equipment needs to access customer network end
During target device, the service network end equipment and second service end are established after connecting, and are led to by the intercommunication at service network end
Know first service end, first service end notifies the first client by the TCP links pre-established, and the first client passes through client
The second client of internal communication notification of network-side establishes the connection with target device, after connection is successfully established, counter-notification clothes
The side apparatus connection of business network-side is successfully established, and is allowed to transmit data, can then be accessed, the time is saved using facilitating, and
The timeliness of data will not be reduced.It can only unidirectionally establish in the network of TCP connection, number is connected and transmit when needing reversely to establish
According to when, it is not necessary to modify equipment network access mode i.e. reached normal data communication so that these need reversely establish connect
It is no different with the access in the network that is directly limited in no fire wall for the equipment connect, and is established by using bottom Transmission Control Protocol
Data link, can be to avoid the interception of fire wall.
On the basis of the above embodiment, a kind of network data transmission that another embodiment of the present invention is provided controls
Method further includes：
Judge whether TCP data link fails；
If so, it closes and abandons the TCP data link；
A TCP data link is rebuild between the first client and first service end.
Further, judge whether TCP data link fails, including：
Judge whether the data transmission in TCP data link is overtime, that is, judges between the first client and first service end
TCP link before the deadline whether without data communication；
If so, the TCP data link is removed from effective TCP data link pond by first service end；
Default fixed news in first service end are sent by TCP data link to the first client；
Judge whether message that the first client receives is default fixed news that first service end is sent；
If so, default fixed news are beamed back into first service end by TCP data link；
Judge whether the message that receives of first service termination is default fixed news that the first client is beamed back；
If so, judging that TCP data link does not fail, and TCP data link is returned to effective TCP data link pond；
If it is not, then judge TCP data link failure.
Further, judge whether TCP data link fails, further include：By the default fixation in first service end
Message is sent by TCP data link after the first client, judges the first service end in default first time threshold value
Whether the default fixed news that the first client beams back are received by TCP data link；
If it is not, then judge TCP data link failure.
Further, judge whether TCP data link fails, further include：Data in TCP data link is judged pass
After defeated time-out, judge in default second time threshold whether the first client by TCP data link receives first
The default fixed news that server-side is sent；
If it is not, judging TCP data link failure, i.e. first service end can not send a message to the first client.
In the present embodiment, judge whether TCP data link fails by above-mentioned each mode, and in the link failure
When, rebuild new data link.It is set for the TCP time-out chain ruptures of fire wall, establishing above-mentioned prevents that time-out is disconnected
The mechanism of chain, while invalid link is cleared up, the appearance of the situation of data communication failure caused by avoiding TCP link fails.
It please refers to Fig.2, the network data transmission Control system architecture that Fig. 2 is provided for a kind of specific embodiment of the present invention
Schematic diagram.
Correspondingly, one embodiment of the present invention additionally provides a kind of network data transmission control system, including：Service network
Network end 1 and customer network end 2, service network end 1 include two sockets services ends for communicating connection, are respectively defined as the
One server-side 11 and second service end 12；Customer network end 2 includes two socket clients for communicating connection, fixed respectively
Justice is the first client 21 and the second client 22；
First client 21 is used for the TCP data chain for pre-establishing the first client and first service end is communicatively coupled
Road；
Second service end 12 is used to obtain the access request of service network end equipment；
TCP data link is used to access request being transmitted to the first client 21, will be visited with will pass through the first client 21
Ask that request is sent to the second client 22；
Second client 22 is used to establish and connect according to preconfigured destination address and the corresponding target device of access request
It connects；
TCP data link is additionally operable to the successful connection information that customer network end is fed back being transmitted to service network end, so as to
Successful connection information is sent to service network end equipment, triggering service network end equipment performs access action.
Data transmission link in the system is based on Transmission Control Protocol, and therefore, which supports Transmission Control Protocol
(Transmission Control Protocol- transmission control protocols) and the various network transmission protocols based on Transmission Control Protocol,
Such as HTTP (HyperText Transfer Protocol- hypertext transfer protocol), HTTPS (Hyper Text Transfer
Protocol over Secure Socket Layer- Hyper text transfers security protocol), FTP (File Transfer
Protocol- File Transfer Protocol), SMTP (Simple Mail Transfer Protocol- Simple Mail Transfer protocols),
SSH (Secure Shell- safety shell protocols) etc. agreement.
By opening two sockets services ends at the service network end of fire wall one side, in the client of fire wall opposite side
Network-side opens two socket clients, then using the permitted mode of fire wall, i.e. the first client to first service
TCP links are established in the direction at end, and keep available.Wherein, when service network end, equipment needs to access customer network end
During target device, the service network end equipment and second service end are established after connecting, and are led to by the intercommunication at service network end
Know first service end, first service end notifies the first client by the TCP links pre-established, and the first client passes through client
The second client of internal communication notification of network-side establishes the connection with target device, after connection is successfully established, counter-notification clothes
The side apparatus connection of business network-side is successfully established, and is allowed to transmit data, can then be accessed, the time is saved using facilitating, and
The timeliness of data will not be reduced.It can only unidirectionally establish in the network of TCP connection, number is connected and transmit when needing reversely to establish
According to when, it is not necessary to modify equipment network access mode i.e. reached normal data communication so that these need reversely establish connect
It is no different with the access in the network that is directly limited in no fire wall for the equipment connect, and is established by using bottom Transmission Control Protocol
Data link, can be to avoid the interception of fire wall.
Further, which further includes：Overtime chain rupture processor, for judging whether TCP data link fails, and
Judge to close during TCP data link failure and abandon the TCP data link and trigger the first client and rebuild a TCP number
According to link.
The specific working mode for the overtime chain rupture processor that present embodiment is provided refer to above method embodiment,
Judge whether TCP data link fails by overtime chain rupture processor, and in the link failure, the first client of triggering is rebuild
New data link.TCP time-out chain ruptures i.e. for fire wall are set, and establish the above-mentioned machine for preventing overtime chain rupture
System, while invalid link is cleared up, the appearance of the situation of data communication failure caused by avoiding TCP link fails.
In conclusion network data transmission control method provided by the present invention and system, can unidirectionally to build
The vertical equipment connected between the heterogeneous networks to communicate can be realized and reversely actively accessed, and the time is saved using facilitating, and will not
Reduce the timeliness of data.
A kind of network data transmission control method provided by the present invention and system are described in detail above.Herein
It applies specific case to be set forth the principle of the present invention and embodiment, the explanation of above example is only intended to help
Understand the present invention and its core concept.It should be pointed out that for those skilled in the art, this hair is not being departed from
On the premise of bright principle, can also to the present invention some improvement and modification can also be carried out, these improvement and modification also fall into power of the present invention
In the protection domain of profit requirement.
Claims (7)
1. a kind of network data transmission control method, which is characterized in that including：
Two sockets services ends for communicating connection are opened in service network end, are respectively defined as first service end and the
Two server-sides；
Two socket clients for communicating connection are opened in customer network end, are respectively defined as the first client and the
Two clients；
Pre-establish first client and TCP data link that the first service end is communicatively coupled；
The access request of service network end equipment is obtained by the second service end；
The access request is sent to by first client by the first service end and the TCP data link, and
The access request is sent to by second client by first client；
It is established by second client according to preconfigured destination address and the corresponding target device of the access request
Connection；
By first client, the TCP data link, the first service end and the second service end by described
The successful connection information of two client feedbacks is sent to service network end equipment；
Access action is performed, carries out service network end equipment and the data communication of the target device.
2. it according to the method described in claim 1, it is characterized in that, further includes：
Judge whether the TCP data link fails；
If so, it closes and abandons the TCP data link；
A TCP data link is rebuild between first client and the first service end.
3. according to the method described in claim 2, it is characterized in that, described judge whether the TCP data link fails, bag
It includes：
Judge whether the data transmission in the TCP data link is overtime；
If so, the TCP data link is removed from effective TCP data link pond by the first service end；
Default fixed news in the first service end are sent by the TCP data link to first client；
Judge whether message that first client receives is default fixed news that the first service end is sent；
If so, the default fixed news are beamed back into the first service end by the TCP data link；
Judge whether message that first service termination receives is default fixed news that first client is beamed back；
If so, judging that the TCP data link does not fail, and the TCP data link is returned to effective TCP data
Link pond；
If it is not, then judge the TCP data link failure.
4. according to the method described in claim 3, it is characterized in that, described judge whether the TCP data link fails, also wrap
It includes：
Default fixed news in the first service end are being sent by the TCP data link to first client
Afterwards, judge in default first time threshold value whether the first service end by the TCP data link receives institute
State the default fixed news that the first client is beamed back；
If it is not, then judge the TCP data link failure.
5. according to the method described in claim 4, it is characterized in that, described judge whether the TCP data link fails, also wrap
It includes：
After the data transmission time-out in judging the TCP data link, judge described in default second time threshold
Whether the first client receives the default fixed news of the first service end transmission by the TCP data link；
If it is not, judge the TCP data link failure.
6. a kind of network data transmission control system, which is characterized in that including：Service network end and customer network end, the clothes
Network-side of being engaged in includes two sockets services ends for communicating connection, is respectively defined as first service end and second service end；
The customer network end includes two socket clients for communicating connection, is respectively defined as the first client and the second visitor
Family end；
First client is used for the TCP for pre-establishing first client and the first service end is communicatively coupled
Data link；
The second service end is used to obtain the access request of service network end equipment；
The TCP data link is used to the access request being transmitted to first client, will pass through first visitor
The access request is sent to second client by family end；
Second client is used to be established according to preconfigured destination address and the corresponding target device of the access request
Connection；
The TCP data link is additionally operable to the successful connection information of customer network end feedback being transmitted to the service network
End, so that the successful connection information is sent to service network end equipment, triggers service network end equipment
Perform access action.
7. system according to claim 6, which is characterized in that further include：
Overtime chain rupture processor for judging whether the TCP data link fails, and is judging the TCP data link mistake
It is closed during effect and abandons the TCP data link and trigger first client and rebuild a TCP data link.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110213320A (en) * | 2019-01-02 | 2019-09-06 | 腾讯科技（深圳）有限公司 | Method, apparatus, electronic equipment and the computer readable storage medium of communication connection |
| CN114172946A (en) * | 2021-12-06 | 2022-03-11 | 京东科技信息技术有限公司 | Request result sending method and device, electronic equipment and computer readable medium |
| CN115314544A (en) * | 2022-08-05 | 2022-11-08 | 成都卫士通信息产业股份有限公司 | TCP data one-way transmission method, device, equipment and medium |
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| CN110213320B (en) * | 2019-01-02 | 2021-11-02 | 腾讯科技（深圳）有限公司 | Communication connection method and device, electronic equipment and computer readable storage medium |
| CN114172946A (en) * | 2021-12-06 | 2022-03-11 | 京东科技信息技术有限公司 | Request result sending method and device, electronic equipment and computer readable medium |
| CN115314544A (en) * | 2022-08-05 | 2022-11-08 | 成都卫士通信息产业股份有限公司 | TCP data one-way transmission method, device, equipment and medium |
| CN115314544B (en) * | 2022-08-05 | 2023-12-15 | 成都卫士通信息产业股份有限公司 | TCP data unidirectional transmission method, device, equipment and medium |
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