CN105871819B - Transfer control method and equipment - Google Patents
Transfer control method and equipment Download PDFInfo
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- CN105871819B CN105871819B CN201610169685.1A CN201610169685A CN105871819B CN 105871819 B CN105871819 B CN 105871819B CN 201610169685 A CN201610169685 A CN 201610169685A CN 105871819 B CN105871819 B CN 105871819B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/401—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
- H04L65/4015—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference where at least one of the additional parallel sessions is real time or time sensitive, e.g. white board sharing, collaboration or spawning of a subconference
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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
- H04L67/131—Protocols for games, networked simulations or virtual reality
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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
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Communication Control (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The object of the present invention is to provide a kind of transfer control method and equipment, the application passes through the protocol data packet during parsing O&M, the code stream of realization one-way transmission control in protocol data packet is revised as abnormal code stream, when target machine recognizes abnormal code stream, protocol data packet discarding is not handled, one-way transmission control can be realized, not only solved the safety control of data transmission, but also can be convenient user and carry out information technoloy equipment operation management.Pass through the application, it may be implemented the control in any one direction for the data that existing operation management system transmits file, file, picture, text etc. by Disk Mapping and clipbook, and improving security of system, producing remarkable result in flexibility.
Description
Technical field
The present invention relates to computer field more particularly to a kind of transfer control method and equipment.
Background technique
Along with the propulsion of national information industry, attention of the information security increasingly by government and enterprise, various IT
After the completion of infrastructure construction, the operation and maintenance of information technoloy equipment become more and more numerous and more jumbled, under these circumstances, operation management system
System is applied and is given birth to.
Middle layer of the operation management system as user and target device, what it needed to complete various agreements acts on behalf of O&M mistake
Journey, while realizing relevant control function.Windows is the dominant firm of current desktop operating system, and included mstsc is even more
The sharp weapon of Remote desk process.Mstsc is carried out using rdp agreement (Remote Desktop Protocol, Remote Desktop Protocol)
Communication, the data exchange between local desktop and remote desktop can be carried out by its included Disk Mapping and clipbook.
But existing windows carries clipbook and Disk Mapping at present, is transmitted in both directions after unlatching, can not do
To the control of one-way transmission, there are safety problems.Specifically, although existing method is able to achieve local and remote data and passes
It is defeated, but there is also very big shortcomings simultaneously:
1. two-way data are transmitted, it is meant that user can download from a server any information；
2. two-way data are transmitted, it is meant that user can upload any information to server.
Summary of the invention
It is an object of the present invention to provide a kind of transfer control method and equipment, are able to solve existing windows certainly
Band clipbook and Disk Mapping, the problem of being transmitted in both directions, can not accomplish the control of one-way transmission after unlatching.
According to an aspect of the invention, there is provided a kind of transfer control method, this method comprises:
O&M is parsed in the process from the received protocol data packet of client, determines realization one-way transmission control in protocol data packet
The code stream location revision of system；
When carrying out one-way transmission control, abnormal code stream will be revised as at code stream location revision described in protocol data packet；
Target machine is sent by modified protocol data packet.
Further, when the protocol data packet is the protocol data packet of clipbook, the code stream location revision is shape
Position where state information.
Further, abnormal code stream will be revised as at code stream location revision described in protocol data packet, comprising:
Code stream at status information position described in protocol data packet is revised as status error information.
Further, when the protocol data packet is the protocol data packet of hard disk mapping, the code stream location revision is
Position where disk number.
Further, abnormal code stream will be revised as at code stream location revision described in protocol data packet, comprising:
Code stream at disk number position described in protocol data packet is revised as unrecognizable disk number.
Further, the protocol data packet is rdp protocol data packet.
According to another aspect of the present invention, a kind of transmission control equipment is additionally provided, which includes:
Protocol resolution module determines protocol data for parsing O&M in the process from the received protocol data packet of client
The code stream location revision of one-way transmission control is realized in packet；It, will be described in protocol data packet and when carrying out one-way transmission control
Abnormal code stream is revised as at code stream location revision；
Sending module, for sending target machine for modified protocol data packet.
Further, when the protocol data packet is the protocol data packet of clipbook, the protocol resolution module is determined
The code stream location revision be status information where position.
Further, the protocol resolution module, for by the code stream at status information position described in protocol data packet
It is revised as status error information.
Further, when the protocol data packet is the protocol data packet of hard disk mapping, the protocol resolution module is true
The fixed code stream location revision is the position where disk number.
Further, the protocol resolution module, for by the code stream at disk number position described in protocol data packet
It is revised as unrecognizable disk number.
Further, the protocol data packet is rdp protocol data packet.
Compared with prior art, the application, will be in protocol data packet by the protocol data packet during parsing O&M
Realize that the code stream of one-way transmission control is revised as abnormal code stream, when target machine recognizes abnormal code stream, to the protocol data
Packet abandon do not handle, one-way transmission control can be realized, not only solved data transmission safety control, but also can be convenient user into
Row information technoloy equipment operation management.By the application, existing operation management system may be implemented to file, file, picture, text
Deng the control in any one direction for the data transmitted by Disk Mapping and clipbook, and improve security of system,
Remarkable result is produced in flexibility.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent upon:
Fig. 1 shows a kind of flow chart of transfer control method of one aspect according to the present invention；
Fig. 2 shows the timing diagrams of the rdp agency service model of one embodiment of the invention；
Fig. 3 shows the clipbook operation timing figure of one embodiment of the invention；
Fig. 4 shows a kind of module map of transmission control equipment according to a further aspect of the present invention.
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
In a typical configuration of this application, terminal, the equipment of service network and trusted party include one or more
Processor (CPU), input/output interface, network interface and memory.
Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flashRAM).Memory is showing for computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or
Any other non-transmission medium, can be used for storage can be accessed by a computing device information.As defined in this article, computer
Readable medium does not include non-temporary computer readable media (transitory media), such as the data-signal and carrier wave of modulation.
As shown in Figure 1, the application provides a kind of transfer control method, this method comprises:
Step S1, parsing O&M determine in the process from the received protocol data packet of client and realize list in protocol data packet
To the code stream location revision of transmission control；
Step S2 will be revised as different when carrying out one-way transmission control at code stream location revision described in protocol data packet
Normal code stream；
Modified protocol data packet is sent target machine by step S3.During the present embodiment is by parsing O&M
Protocol data packet, by protocol data packet realization one-way transmission control code stream be revised as abnormal code stream, in target machine
When recognizing abnormal code stream, protocol data packet discarding is not handled, one-way transmission control can be realized, has both solved data transmission
Safety control, and can be convenient user carry out information technoloy equipment operation management.
In one preferred embodiment of transfer control method of the application, the protocol data packet is rdp protocol data packet.Tool
Body, as shown in Fig. 2, rdp broker program is equivalent to the middle layer of system, by it be responsible for receiving rdp client (mstsc,
Rdesktop etc.) send over I/O request, protocol resolution module built in the agency service, the module be mainly responsible for parsing fortune
There is the protocol data packet of substantial connection during dimension with Disk Mapping and clipbook, is needed according to user in agreement after being parsed
Data packet is inserted into abnormal code stream, forms modified agreement I/O operation request (modified protocol data packet), and by the modification
Agreement I/O operation request afterwards is forwarded to remote object machine, and remote object machine receives the modified agreement I/O operation
After request, rdp broker program receives remote object machine and does not handle the discarding of the modified agreement I/O operation request
Response after, then rdp client (mstsc, rdesktop etc.) is forwarded to, to realize one-way transmission control.
In one preferred embodiment of transfer control method of the application, when the agreement number that the protocol data packet is clipbook
When according to packet, the code stream location revision is the position where status information.Here, being controlled by the uplink and downlink to clipbook, both
The safety of system can be improved, and do not influence the normal use of system.For example, as shown in figure 3, in rdp agreement, clipbook
Data be to be transmitted by the proprietary virtual channel of clipbook, local and distal end copy and paste operation, will use
To the system clipboard at both ends.Host A triggers clipbook update notification when carrying out copy function first.Clipbook is empty
Quasi- tunnel ends receive the notice, send clipbook update and request to host B, can be according to the lattice of request after B receives the request
Formula modifies local clipboard information, pays attention to not transmitting actual data at this time, can send after the success of B clipbook information update
Response message is to host A.It carries out pasting operation on host B, then can trigger clipboard data request, which passes through rdp generation
Reason service, is forwarded to host A, and at this time host A needs the clipboard data by actual storage to send with the format of protocol conventions
To host B, host B receives data and updates local clipboard, and application program can be complete by using local clipboard at this time
Operation is pasted at data.In the process of entire clipbook described above, there is a key point, is exactly that A host obtains this
Ground clipbook real data is given to B host by rdp agency service, and the clipbook uplink and downlink control realized in the application is exactly
By carrying out completing and agreement inserts code in this process.For example, rdp agency service receives the clipbook of A host transmission
After data response, by invocation protocol analysis module, each sound can be found after being decoded decoding to the protocol data of the process
The inside, which should be wrapped, can all carry a status information, which indicates whether A host gets clipboard data, and need to do is exactly
According to the configuration of uplink and downlink parameter, to decide whether to modify the state information field, the side of code is inserted by this agency plus agreement
Formula can realize the uplink and downlink control to clipbook.
In one preferred embodiment of transfer control method of the application, at code stream location revision described in protocol data packet
It is revised as abnormal code stream, comprising:
Code stream at status information position described in protocol data packet is revised as status error information.For example, being assisted in rdp
In view, if 0 indicates that state is normal, 2 indicate status error, and when needing to carry out unidirectionally controlled, then need to do herein is exactly
The status information of protocol data packet is revised as 2 by 0, it is very convenient to operate.
In one preferred embodiment of transfer control method of the application, when the agreement that the protocol data packet is hard disk mapping
When data packet, the code stream location revision is the position where disk number.Here, passing through the uplink and downlink control mapped hard disk
System, not only can be improved the safety of system, but also do not influence the normal use of system.For example, in rdp agreement, Disk Mapping
Data are transmitted by proprietary virtual channel.Although the related procedure of Disk Mapping and clipbook are different, lead to
This rdp Proxy service mode is crossed, by invocation protocol analysis module, parses the corresponding data cell of Disk Mapping, it can also
To realize that its uplink and downlink controls.
In one preferred embodiment of transfer control method of the application, at code stream location revision described in protocol data packet
It is revised as abnormal code stream, comprising:
Code stream at disk number position described in protocol data packet is revised as unrecognizable disk number.Specifically
, during parsing Disk Mapping, it is found that the disk of mapping can distribute a fixed disk number id in the protocol,
Disk number id uniqueness identifies one piece of disk.The I/O operations such as the read-write to the disk are carried out by this id
, so rdp agency service, after parsing Disk Mapping and reading and writing I/O accordingly, if there is the needs of uplink and downlink control, then
It needs to modify No. id that the id is a system nonrecognition, thus can easily realize the control of uplink and downlink.
By the application, existing operation management system may be implemented to file, file, picture, text etc. by magnetic
The control in any one direction for the data that disk mapping and clipbook are transmitted, and in raising security of system, flexibility
Produce remarkable result.
According to the another side of the application, a kind of transmission control equipment is also provided, wherein the equipment 100 includes:
Protocol resolution module 1 determines protocol data for parsing O&M in the process from the received protocol data packet of client
The code stream location revision of one-way transmission control is realized in packet；It, will be described in protocol data packet and when carrying out one-way transmission control
Abnormal code stream is revised as at code stream location revision；
Sending module 2, for sending target machine for modified protocol data packet.The present embodiment passes through parsing O&M
The code stream of realization one-way transmission control in protocol data packet is revised as abnormal code stream, in mesh by protocol data packet in the process
When marking machine recognition and arriving abnormal code stream, which is abandoned and is not handled, one-way transmission control can be realized, both solve number
It is controlled according to the safety of transmission, and can be convenient user and carry out information technoloy equipment operation management.
In one preferred embodiment of transmission control equipment of the application, the protocol data packet is rdp protocol data packet.Tool
Body, as shown in Fig. 2, rdp broker program is equivalent to the middle layer of system, by it be responsible for receiving rdp client (mstsc,
Rdesktop etc.) send over I/O request, protocol resolution module built in the agency service, the module be mainly responsible for parsing fortune
There is the protocol data packet of substantial connection during dimension with Disk Mapping and clipbook, is needed according to user in agreement after being parsed
Data packet is inserted into abnormal code stream, forms modified agreement I/O operation request (modified protocol data packet), and by the modification
Agreement I/O operation request afterwards is forwarded to remote object machine, and remote object machine receives the modified agreement I/O operation
After request, rdp broker program receives remote object machine and does not handle the discarding of the modified agreement I/O operation request
Response after, then rdp client (mstsc, rdesktop etc.) is forwarded to, to realize one-way transmission control.
In one preferred embodiment of transmission control equipment of the application, when the agreement number that the protocol data packet is clipbook
When according to packet, the code stream location revision that the protocol resolution module 1 determines is the position where status information.Here, passing through
Uplink and downlink control to clipbook, not only can be improved the safety of system, but also do not influence the normal use of system.For example, such as Fig. 3
Shown, in rdp agreement, the data of clipbook are transmitted by the proprietary virtual channel of clipbook, local and distal end
Copy and paste operation, will use the system clipboard to both ends.Host A triggers first when carrying out copy function
Clipbook update notification.Clipbook virtual channel termination receives the notice, sends clipbook and updates request to host B, B is received
After the request, local clipboard information can be modified, pays attention to not transmitting actual data at this time, B is cliped and pasted according to the format of request
Response message can be sent to host A after the success of plate information update.It carries out pasting operation on host B, then can trigger clipbook number
According to request, which passes through rdp agency service, is forwarded to host A, at this time host A is needed the clipbook number of actual storage
The format of protocol conventions is sent to host B accordingly, and host B receives data and updates local clipboard, and application program can at this time
To paste operation by using local clipboard completion data.In the process of entire clipbook described above, there is one
Key point is exactly that A host obtains local clipboard real data, is given to B host by rdp agency service, realizes in the application
The control of clipbook uplink and downlink, exactly by carrying out the slotting code of agreement in this process and complete.For example, rdp agency service
After the clipboard data response for receiving the transmission of A host, by invocation protocol analysis module, the protocol data of the process is carried out
It can find that a status information can be carried inside each response bag after decoding decoding, which indicates whether A host gets
Clipboard data, need to do is exactly, to decide whether to modify the state information field, to be passed through according to the configuration of uplink and downlink parameter
The mode that this agency plus agreement insert code can realize the uplink and downlink control to clipbook.
In one preferred embodiment of transmission control equipment of the application, the protocol resolution module 1 is used for protocol data
Code stream at status information position described in packet is revised as status error information.For example, in rdp agreement, if 0 indicates state
Normally, 2 status error is indicated, when needing to carry out unidirectionally controlled, then need to do herein is exactly by the state of protocol data packet
Information is revised as 2 by 0, and it is very convenient to operate.
In one preferred embodiment of transmission control equipment of the application, when the agreement that the protocol data packet is hard disk mapping
When data packet, the code stream location revision that the protocol resolution module 1 determines is the position where disk number.Here, logical
The uplink and downlink control to hard disk mapping is crossed, the safety of system not only can be improved, but also do not influence the normal use of system.For example,
In rdp agreement, the data of Disk Mapping are transmitted by proprietary virtual channel.Although the related procedure of Disk Mapping
It is different with clipbook, but parse disk by invocation protocol analysis module by this rdp Proxy service mode and reflect
Corresponding data cell is penetrated, the control of its uplink and downlink also may be implemented.
In one preferred embodiment of transmission control equipment of the application, the protocol resolution module 1 is used for protocol data
Code stream at disk number position described in packet is revised as unrecognizable disk number.Specifically, in parsing Disk Mapping
In the process, it is found that the disk of mapping can distribute a fixed disk number id, disk number id uniqueness in the protocol
Identify one piece of disk.The I/O operations such as the read-write to the disk are carried out by this id, so rdp agency service,
After parsing Disk Mapping and reading and writing I/O accordingly, if there is the needs of uplink and downlink control, then needing to modify the id for one is
No. id of system nonrecognition, thus can easily realize the control of uplink and downlink.
In conclusion the application passes through the protocol data packet during parsing O&M, by the realization list in protocol data packet
It is revised as abnormal code stream to the code stream of transmission control, when target machine recognizes abnormal code stream, which is abandoned
It does not handle, one-way transmission control can be realized, not only solved the safety control of data transmission, but also can be convenient user's progress IT and set
Standby operation management.By the application, may be implemented existing operation management system to file, file, picture, text etc. by
The control in any one direction for the data that Disk Mapping and clipbook are transmitted, and improving security of system, flexibility
On produce remarkable result.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
It should be noted that the present invention can be carried out in the assembly of software and/or software and hardware, for example, can adopt
With specific integrated circuit (ASIC), general purpose computer or any other realized similar to hardware device.In one embodiment
In, software program of the invention can be executed to implement the above steps or functions by processor.Similarly, of the invention
Software program (including relevant data structure) can be stored in computer readable recording medium, for example, RAM memory,
Magnetic or optical driver or floppy disc and similar devices.In addition, some of the steps or functions of the present invention may be implemented in hardware, example
Such as, as the circuit cooperated with processor thereby executing each step or function.
In addition, a part of the invention can be applied to computer program product, such as computer program instructions, when its quilt
When computer executes, by the operation of the computer, it can call or provide according to the method for the present invention and/or technical solution.
And the program instruction of method of the invention is called, it is possibly stored in fixed or moveable recording medium, and/or pass through
Broadcast or the data flow in other signal-bearing mediums and transmitted, and/or be stored according to described program instruction operation
In the working storage of computer equipment.Here, according to one embodiment of present invention including a device, which includes using
Memory in storage computer program instructions and processor for executing program instructions, wherein when the computer program refers to
When enabling by processor execution, method and/or skill of the device operation based on aforementioned multiple embodiments according to the present invention are triggered
Art scheme.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it is clear that one word of " comprising " does not exclude other units or steps, and odd number is not excluded for plural number.That states in device claim is multiple
Unit or device can also be implemented through software or hardware by a unit or device.The first, the second equal words are used to table
Show title, and does not indicate any particular order.
Claims (12)
1. a kind of transfer control method, wherein this method comprises:
O&M is parsed in the process from the received protocol data packet of client, determines and realizes one-way transmission control in protocol data packet
Code stream location revision；
When carrying out one-way transmission control, abnormal code stream will be revised as at code stream location revision described in protocol data packet；
Target machine is sent by modified protocol data packet.
2. according to the method described in claim 1, wherein, when the protocol data packet is the protocol data packet of clipbook, institute
Stating code stream location revision is the position where status information.
3. according to the method described in claim 2, wherein, exception will be revised as at code stream location revision described in protocol data packet
Code stream, comprising:
Code stream at status information position described in protocol data packet is revised as status error information.
4. according to the method described in claim 1, wherein, when the protocol data packet is the protocol data packet of hard disk mapping,
The code stream location revision is the position where disk number.
5. according to the method described in claim 4, wherein, exception will be revised as at code stream location revision described in protocol data packet
Code stream, comprising:
Code stream at disk number position described in protocol data packet is revised as unrecognizable disk number.
6. method according to any one of claims 1 to 5, wherein the protocol data packet is Remote Desktop Protocol agreement
Data packet.
7. a kind of transmission control equipment, wherein the equipment includes:
Protocol resolution module determines in protocol data packet for parsing O&M in the process from the received protocol data packet of client
Realize the code stream location revision of one-way transmission control；And when carrying out one-way transmission control, by code stream described in protocol data packet
Abnormal code stream is revised as at location revision；
Sending module, for sending target machine for modified protocol data packet.
8. equipment according to claim 7, wherein when the protocol data packet is the protocol data packet of clipbook, institute
Stating the code stream location revision that protocol resolution module determines is the position where status information.
9. equipment according to claim 8, wherein the protocol resolution module is used for shape described in protocol data packet
Code stream at state information position is revised as status error information.
10. equipment according to claim 7, wherein when the protocol data packet is the protocol data packet of hard disk mapping,
The code stream location revision that the protocol resolution module determines is the position where disk number.
11. equipment according to claim 10, wherein the protocol resolution module, being used for will be described in protocol data packet
Code stream at disk number position is revised as unrecognizable disk number.
12. according to the described in any item equipment of claim 7 to 11, wherein the protocol data packet is Remote Desktop Protocol association
Discuss data packet.
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| CN110858837B (en) * | 2018-08-24 | 2022-09-06 | 阿里巴巴集团控股有限公司 | Network management and control method and device and electronic equipment |
| CN111967059A (en) * | 2020-08-11 | 2020-11-20 | 广东堡塔安全技术有限公司 | Website tamper-proofing method and system and computer readable storage medium |
| CN114301929B (en) * | 2021-12-10 | 2024-03-08 | 阿里巴巴（中国）有限公司 | Cloud clipboard data synchronization method and device, cloud server and system |
| CN115086308B (en) * | 2022-04-27 | 2023-10-20 | 上海上讯信息技术股份有限公司 | RDP-based data transmission control method and device |
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| CN101964798A (en) * | 2010-10-15 | 2011-02-02 | 德讯科技股份有限公司 | Multi-graphic protocol unified proxy system based on remote desktop protocol |
| CN105378659A (en) * | 2013-06-14 | 2016-03-02 | 托加里奥有限责任公司 | Method and system for enabling access of client device to remote desktop |
| CN104618341A (en) * | 2013-11-05 | 2015-05-13 | 通用电气公司 | Systems and methods for secute remote access |
| CN104717267A (en) * | 2013-12-17 | 2015-06-17 | 上海贝尔股份有限公司 | Local I/O equipment connector for VHE |
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