CN115174562A - Remote assistance communication method and system - Google Patents
Remote assistance communication method and system Download PDFInfo
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- CN115174562A CN115174562A CN202210579743.3A CN202210579743A CN115174562A CN 115174562 A CN115174562 A CN 115174562A CN 202210579743 A CN202210579743 A CN 202210579743A CN 115174562 A CN115174562 A CN 115174562A
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- 238000004891 communication Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000013507 mapping Methods 0.000 claims abstract description 29
- 238000009877 rendering Methods 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 claims description 4
- 230000035515 penetration Effects 0.000 abstract description 11
- 230000007246 mechanism Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 12
- 230000014509 gene expression Effects 0.000 description 6
- 230000003993 interaction Effects 0.000 description 4
- 230000000873 masking effect Effects 0.000 description 4
- 238000013519 translation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 1
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- H—ELECTRICITY
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/08—Protocols specially adapted for terminal emulation, e.g. Telnet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
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Abstract
A communication method and a system for remote assistance are disclosed, wherein the method comprises the following steps that a client initiates a remote desktop connection request, records remote desktop connection operation, and asynchronously informs a target terminal, the target terminal informs an Xredcore service to prepare a desktop for pipeline communication, a remote server manages port mapping initiated by the client, the port mapping initiated by the client is forwarded to the target terminal, after the target terminal is started, the target terminal is connected with the remote server to judge whether the target terminal is in an NAT environment, only if the target terminal is judged to be in the NAT environment, the steps are continued, mapping ports distributed by the remote server are called, and the Xredcore service enters the remote desktop after the preparation of the desktop is completed. By the scheme, an intranet penetration mechanism can be realized, and the NAT environment terminal is allowed to be accessed, so that the remote desktop can be used for connection communication under the non-public network IP environment.
Description
Technical Field
The invention relates to the field of remote desktop connection, in particular to a method and a system for improving remote assistance connection safety.
Background
In existing scenarios, an open-source remote desktop connection component RealVNC is used in a project to make remote desktop connections. RealVNC is a piece of open source remote control software based on VNC standards. VNC (Virtual Network Console), a Virtual Network Console, provides efficient and practical remote control functions. VNC is basically composed of two parts: VNC Viewer and VNC Server. The VNC establishes communication with the VNC Server through the VNC Viewer, confirms the VNC version and verifies user information. And if the client passes the verification of the VNC Server, the client requests the VNC Server to display the desktop environment.
The RealVNC performs network communication based on a communication protocol RFB (Remote Frame Buffer) that is a reliable transmission protocol operating at a Frame Buffer level. This provides great flexibility for remote connectivity, not only enables the VNC to support remote connectivity between various different platforms, but also greatly reduces the need for client hardware. However, in the prior art, intranet penetration access cannot be performed.
Disclosure of Invention
Therefore, it is necessary to provide a technical solution that can access a server in a public network environment through an intranet.
To achieve the above object, the inventors provide a remote-assisted communication method,
comprises the following steps of (a) preparing a solution,
the client initiates a remote desktop connection request, records the remote desktop connection operation, and asynchronously notifies the target terminal,
the target terminal informs the Xredcore service to prepare a desktop for pipeline communication, the remote server manages the port mapping initiated by the client, the port mapping initiated by the client is forwarded to the target terminal,
after the target terminal is started, the target terminal is connected with the remote server to judge whether the target terminal is in the NAT environment or not, the steps are continued only when the target terminal is judged to be in the NAT environment, the mapping port distributed by the remote server is called, and the Xred core service enters the remote desktop after the desktop preparation is completed.
Optionally, the XredCore service is configured to perform pipeline communication with the client, and transmit the desktop in a format of graphics information to the client for rendering.
Optionally, the method further comprises the step of communicating the pipeline, wherein the pipeline communication comprises a main pipeline channel, a display channel, an input pipeline and a pointer pipeline;
the main pipe channel is used for control connection; the display channel is used for interacting desktop graphic information; the input pipeline is used for receiving a client input command; the pointer pipeline is used for receiving mouse information; the media pipe is used for transmitting media information, and the XredCore service also establishes a redundant link when in connection, so that the communication availability is ensured.
Optionally, the method further includes the step that the target terminal interacts with the remote server, specifically including performing token authentication based on an authentication service on a remote assistance request of the remote server.
Optionally, the interacting between the target terminal and the remote server further includes polling the connection state of the XredCore at regular time and reporting heartbeat information to the server.
A communication system for remote assistance in a communication system,
comprises a client, a remote server and a target terminal,
the client is used for initiating a remote desktop connection request, recording remote desktop connection operation and asynchronously informing a target terminal,
the target terminal is used for informing the Xredcore service to prepare a desktop for pipeline communication, the remote server user manages the port mapping initiated by the client and forwards the port mapping initiated by the client to the target terminal,
the target terminal is used for being connected with a remote server, the remote server is also used for judging whether the target terminal is in the NAT environment, the steps are continued only when the target terminal is judged to be in the NAT environment, a mapping port distributed by the remote server is called, and the Xred core service enters a remote desktop after the desktop preparation is completed.
Optionally, the XredCore service is configured to perform pipeline communication with the client, and transmit the desktop to the client in a format of graphical information for rendering.
Optionally, the method further comprises the step of communicating the pipeline, wherein the pipeline comprises a main pipeline channel, a display channel, an input pipeline and a pointer pipeline;
the main pipe channel is used for control connection; the display channel is used for interacting desktop graphic information; the input pipeline is used for receiving a client input command; the pointer pipeline is used for receiving mouse information; the media pipe is used for transmitting media information, and the Xredcore service also establishes a redundant link when in connection, thereby ensuring the availability of communication.
Optionally, the method further includes the step that the target terminal is configured to interact with the remote server, specifically: token authentication based on an authentication service is performed on a remote assistance request of a remote server.
Specifically, the step of the target terminal interacting with the remote server specifically includes: and polling the connection state of the Xredcore at fixed time, and reporting the heartbeat information to the server.
By the scheme, an intranet penetration mechanism can be realized, and the NAT environment terminal is allowed to be accessed, so that the remote desktop can be used for connection communication under the non-public network IP environment.
Drawings
FIG. 1 is a flow diagram of a method for remote assistance in accordance with an embodiment;
fig. 2 is a schematic diagram illustrating interaction between a target terminal and a remote server according to an embodiment;
fig. 3 is a flowchart illustrating interaction between a target terminal and a remote server according to an embodiment;
FIG. 4 is a flowchart illustrating intranet traversal communication according to one embodiment;
fig. 5 is a diagram of a remotely assisted communication system, in accordance with an embodiment.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.
Unless otherwise defined, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended only to describe particular embodiments and is not intended to limit the present application.
In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, indicating that three relationships may exist, for example, a and/or B, indicating that: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".
In this application, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations.
Without further limitation, in this application, the use of the phrases "comprising," "including," "having," or other similar expressions, is intended to cover a non-exclusive inclusion, and these expressions do not exclude the presence of additional elements in a process, method, or article that includes the elements, such that a process, method, or article that includes a list of elements may include not only those elements defined, but other elements not expressly listed, or may include other elements inherent to such process, method, or article.
As is understood in the examination of the guidelines, the terms "greater than", "less than", "more than" and the like in this application are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. In addition, in the description of the embodiments of the present application, "a plurality" means two or more (including two), and expressions related to "a plurality" similar thereto are also understood, for example, "a plurality of groups", "a plurality of times", and the like, unless specifically defined otherwise.
In the description of the embodiments of the present application, spatially relative expressions such as "central," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the specific embodiments or drawings and are only for convenience of describing the specific embodiments of the present application or for the convenience of the reader, and do not indicate or imply that the device or component in question must have a specific position, a specific orientation, or be constructed or operated in a specific orientation and therefore should not be construed as limiting the embodiments of the present application.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and "disposed" used in the description of the embodiments of the present application should be construed broadly. For example, the connection can be a fixed connection, a detachable connection, or an integrated arrangement; it can be a mechanical connection, an electrical connection, or a communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application belongs according to specific situations.
In some embodiments, referring to fig. 1, a method of remotely assisted communication is provided,
comprises the following steps of (a) carrying out,
s1, a client initiates a remote desktop connection request, records remote desktop connection operation, asynchronously notifies a target terminal,
s2, the target terminal informs the Xredcore service to prepare a desktop for pipeline communication, the remote server manages the port mapping initiated by the client, the port mapping initiated by the client is forwarded to the target terminal,
and S3, after the target terminal is started, the target terminal is connected with the remote server to judge whether the target terminal is in the NAT environment, and the steps are continued only when the target terminal is judged to be in the NAT environment, the mapping port distributed by the remote server is called, and the Xred core service enters the remote desktop after the desktop preparation is finished.
The client can be a personal computer, and the function can be realized by installing WeixunClient software to initiate a remote desktop connection request and support an Xred protocol. Wherein the Weixunclient software and the Xred protocol are developed finished products.
The remote server can comprise an frp service and an NAT service, wherein frp is an open-source, simple and easy-to-use and high-performance intranet penetrating and reverse proxy software and supports protocols such as tcp, udp, http and https. The frp is mapped through ports of the internal network and the external network, the server frps is provided with an open port for connecting the client, and the client frpc configures the address of the server and the mapping port exposed to the outside, so that an efficient internal network penetration mechanism is realized. NAT (Network Address Translation), also called Network masking or IP masking. NAT is a network address translation technology, and mainly converts an internal private IP address into a public network IP that can be used in a public network. NAT can make a plurality of computers share a public network IP and network simultaneously, and hide its intranet IP, consequently also increased the network security of intranet. The hosts in two different local area networks are direct, and can only know the public network IP of the other side and cannot locate the corresponding private IP, so that normal communication cannot be carried out. Therefore, if intranet penetration is required, a relay server with public IP is required for bridging.
The target terminal here may be a terminal that supports the actual running desktop of the XredCore component, which is an autonomously developed auxiliary software for accessing the remote server and doing the reverse proxy.
Resources occupied in the main process can be released in the asynchronous execution process, the problem that the resources are not released for a long time due to network delay in a specific environment is avoided, operation blockage is avoided, and effect efficiency is improved.
In an embodiment of the present application, at least one of the target terminal and the client is in an intranet IP. Through the scheme, the port mapping management is carried out through the remote server, the intranet penetration can be realized, and the normal communication can be carried out no matter which one of the target terminal and the client is located in the intranet IP.
In other embodiments, the XredCore service is configured to communicate with the client in a pipeline, and transmit the desktop in a graphical format to the client for rendering. The pipeline communication is that the sending process sends a large amount of data into the pipeline in a character stream mode, the receiving process can receive the data from the pipeline, and the receiving process and the pipeline are used for communication. Meanwhile, the desktop is transmitted in a graphic mode, and the desktop transmission method is different from the remote desktop synchronization based on pixels in the prior art, and the characteristic of pipeline communication can be better conformed by the direct transmission in the graphic mode. The remote desktop protocol based on the Xred protocol is adopted, and a mode of sending graphic primitives replaces a mode of sending pixels of an RFB protocol depended on by VNC, so that data analysis time delay is reduced, and the frame rate of the remote desktop is improved.
In some further embodiments, the method further comprises the step of communicating the pipeline including a main pipeline, a display pipeline, an input pipeline, and a pointer pipeline; the main pipe channel is used for controlling connection; the display channel is used for interacting desktop graphic information; the input pipeline is used for receiving a client input command; the pointer pipeline is used for receiving mouse information; the media pipe is used for transmitting media information, and the Xredcore service also establishes a redundant link when in connection, thereby ensuring the availability of communication. According to the scheme, multi-information interaction can be better carried out by utilizing pipeline communication, and communication delay is reduced.
In some embodiments of the present application, the method further includes a step, as shown in fig. 2, that the S4 target terminal interacts with the remote server, specifically including S41 performing token authentication based on an authentication service on a remote assistance request of the remote server. The authentication of the remote request can prevent the wrong access or the malicious access, thereby improving the safety of the scheme.
In some embodiments of the application, as shown in fig. 3, the interacting between the target terminal and the remote server further includes, in step S42, polling the connection status of the XredCore at regular time, and reporting the heartbeat information to the server. By regularly polling the connection state and timely monitoring and broadcasting the terminal information, the connection state can be ensured not to be interrupted.
In some other comprehensive embodiments of the present application, please refer to fig. 4, which includes a server, a client, and a terminal, wherein the server installs remote desktop services and frps services, the client installs WeixunClient services, and the terminal includes a vda component and an XredCore component services. In the flow shown in fig. 4, starting with a front-end user initiating a remote desktop connection request, the remote connection service verifies the access right, and if the access right passes the right verification, records the remote desktop connection operation, and asynchronously notifies the dda client in the terminal. And the vdda records user information and informs the Xredcore to prepare a desktop, and after the desktop is prepared, the vdda monitors the heartbeat and informs the server in real time. The remote connection service regularly polls to acquire a desktop preparation state, if the desktop preparation is completed, the local WeixunClient client is called to start remote desktop connection, a connection channel with the terminal is established, and the user connection enters the remote desktop.
The frp high performance reverse proxy of the terminal is configured before the initiation of the process. And the remote connection service end starts the frp service end, all port mappings initiated by the terminal frp client are uniformly registered on the frp service end, and the port mappings are persisted in a database of the remote connection service, so that the uniform management and control of the ports are realized. And after the default start of the vda, loading the remote connection service terminal to judge whether the current terminal belongs to the NAT environment, if so, calling the remote connection service to acquire the allocated mapping port, modifying the configuration file of the frp client and starting the frp proxy. Meanwhile, the remote connection server is informed that the frp service is started, and the server records the current port mapping condition. After the frp client is started, the frp client can be automatically registered in the frp server, and can be uniformly monitored and managed through the monitoring page. The remote connection server can access the remote desktop of the NAT environment through the port after the access mapping, and the intranet penetration is realized.
In the embodiment shown in fig. 5, a remote assisted communication system is further introduced, which includes a client 500, a remote server 501, and a target terminal 502, where the client is configured to initiate a remote desktop connection request, record a remote desktop connection operation, and asynchronously notify the target terminal, the target terminal is configured to notify an XredCore service preparation desktop for pipeline communication, a remote server user manages a port mapping initiated by the client, and forwards the port mapping initiated by the client to the target terminal, the target terminal is configured to connect the remote server, the remote server is further configured to determine whether the target terminal is in an NAT environment, and only if the target terminal is determined to be in the NAT environment, the steps are continued to call a mapping port allocated by the remote server, and the XredCore service preparation desktop enters the remote desktop after the preparation desktop is completed.
The client can be a personal computer, and can realize functions by installing WeixunClient software to initiate a remote desktop connection request and support an Xred protocol. Wherein the WeixunClient software and the Xred protocol are developed and finished products.
The remote server can comprise an frp service and a NAT service, wherein the frp is an open-source, simple and easy-to-use and high-performance intranet penetration and reverse proxy software and supports protocols such as tcp, udp, http and https. The frp is mapped through ports of the internal network and the external network, the server frps is provided with an open port for connecting the client, and the client frpc configures the address of the server and the mapping port exposed to the outside, so that an efficient internal network penetration mechanism is realized. NAT (Network Address Translation), also called Network masking or IP masking. NAT is a network address translation technology, and mainly converts an internal private IP address into a public network IP that can be used in a public network. NAT can make a plurality of computers share a public network IP and simultaneously network, and hide its intranet IP, consequently also increased the network security of intranet. The hosts in two different local area networks are direct, and can only know the public network IP of the other side and cannot locate the corresponding private IP, so that normal communication cannot be carried out. Therefore, if intranet penetration is required, a relay server with public IP is required for bridging.
The target terminal here may be a terminal that supports the actual running desktop of an XredCore component, which is an autonomously developed auxiliary software for accessing a remote server and doing a reverse proxy.
Resources occupied in the main process can be released in the asynchronous execution process, the problem that the resources are not released for a long time due to network delay in a specific environment is avoided, operation blockage is avoided, and effect efficiency is improved.
Optionally, the XredCore service is configured to perform pipeline communication with the client, and transmit the desktop to the client in a format of graphical information for rendering.
Optionally, the method further comprises the step of communicating the pipeline, wherein the pipeline communication comprises a main pipeline channel, a display channel, an input pipeline and a pointer pipeline;
the main pipe channel is used for control connection; the display channel is used for interacting desktop graphic information; the input pipeline is used for receiving a client input command; the pointer pipeline is used for receiving mouse information; the media pipe is used for transmitting media information, and the XredCore service also establishes a redundant link when in connection, so that the communication availability is ensured.
Optionally, the method further includes the step that the target terminal is configured to interact with the remote server, and specifically configured to: token authentication based on an authentication service is performed on a remote assistance request of a remote server.
Specifically, the step of the target terminal interacting with the remote server specifically includes: and polling the connection state of the Xredcore at fixed time, and reporting the heartbeat information to the server.
By the scheme, an intranet penetration mechanism can be realized, and the NAT environment terminal is allowed to be accessed, so that the remote desktop can be used for connection communication under the non-public network IP environment.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (10)
1. A method of remotely assisted communication,
comprises the following steps of (a) preparing a solution,
the client initiates a remote desktop connection request, records the remote desktop connection operation, and asynchronously notifies the target terminal,
the target terminal informs the Xredcore service to prepare a desktop for pipeline communication, the remote server manages the port mapping initiated by the client, the port mapping initiated by the client is forwarded to the target terminal,
and after the target terminal is started, the target terminal is connected with the remote server to judge whether the target terminal is in the NAT environment, and the steps are continued only if the target terminal is judged to be in the NAT environment, the mapping port allocated by the remote server is called, and the Xredcore service enters the remote desktop after the desktop preparation is finished.
2. The remotely assisted communication method of claim 1, wherein the XredCore service is configured to pipeline the client to transmit a desktop in graphical information format for rendering.
3. The remote-assisted communication method according to claim 2, further comprising the steps of the pipe communication including a main pipe channel, a display channel, an input pipe, and a pointer pipe;
the main pipe channel is used for control connection; the display channel is used for interacting desktop graphic information; the input pipeline is used for receiving a client input command; the pointer pipeline is used for receiving mouse information; the media pipe is used for transmitting media information, and the Xredcore service also establishes a redundant link when in connection, thereby ensuring the availability of communication.
4. The communication method for remote assistance according to claim 1, further comprising a step of the target terminal interacting with the remote server, specifically comprising performing token authentication based on an authentication service on a remote assistance request of the remote server.
5. The method of claim 4, wherein the target terminal interacting with the remote server further comprises periodically polling the connection status of the Xredcore and reporting heartbeat information to the server.
6. A remote assisted communication system, characterized in that,
comprises a client, a remote server and a target terminal,
the client is used for initiating a remote desktop connection request, recording remote desktop connection operation and asynchronously notifying a target terminal,
the target terminal is used for informing the Xred core service to prepare a desktop and carry out pipeline communication, the remote server user manages the port mapping initiated by the client and forwards the port mapping initiated by the client to the target terminal,
the target terminal is used for being connected with a remote server, the remote server is also used for judging whether the target terminal is in the NAT environment, the steps are continued only when the target terminal is judged to be in the NAT environment, a mapping port distributed by the remote server is called, and the Xred core service enters a remote desktop after the desktop preparation is completed.
7. The remote-assisted communication system according to claim 6, wherein the XredCore service is configured to pipe a client to render a desktop in a graphical information format for the client.
8. The remote-assisted communication system according to claim 7, further comprising the steps of the pipe communication including a main pipe channel, a display channel, an input pipe, and a pointer pipe;
the main pipe channel is used for control connection; the display channel is used for interacting desktop graphic information; the input pipeline is used for receiving a client input command; the pointer pipeline is used for receiving mouse information; the media pipe is used for transmitting media information, and the XredCore service also establishes a redundant link when in connection, so that the communication availability is ensured.
9. The remotely assisted communication system according to claim 6, characterized in that it comprises a further step of the target terminal being adapted to interact with the remote server, in particular to: token authentication based on an authentication service is performed on a remote assistance request of a remote server.
10. The remotely-assisted communication system according to claim 9, wherein the target terminal being configured to interact with the remote server specifically comprises: and polling the connection state of the Xredcore at fixed time, and reporting the heartbeat information to the server.
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| CN116208660A (en) * | 2023-02-17 | 2023-06-02 | 北京神州云合数据科技发展有限公司 | Method, device, system, equipment and medium for dynamically connecting remote desktop with cloud server |
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