CN112565372A - Communication method and system for virtual machine and client during network isolation - Google Patents
Communication method and system for virtual machine and client during network isolation Download PDFInfo
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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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
- H04L63/0272—Virtual private networks
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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]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
- H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
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Abstract
The invention discloses a communication system and a method of a virtual machine and a client machine during network isolation, which comprises the following steps: the virtual machine comprises virtual serial port equipment, and the virtual serial port equipment is associated to local SOCKET equipment of the host machine; the host machine is used as a SOCKET server and is configured to run a forwarding program, monitor a set port, receive a connection request of the client machine and open local SOCKET equipment of the virtual machine so as to forward data between the client machine and the local SOCKET equipment; and the client, as a SOCKET client, is configured to encapsulate the local IP address and initiate a connection request to the host when communication with the virtual machine is required.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a method and a system for communication between a virtual machine and a client during network isolation.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the super-convergence scenario, the network between the virtual machines is called a service network, and the network between the client and the host is called an office network. For security reasons, the business network and the office network are usually isolated and cannot communicate with each other.
However, it is sometimes desirable to open a particular network application between a virtual machine and a client, such as: the virtual machine remotely mounts the CD driver of the client machine through an iSCSI protocol; the existing solutions cannot meet the above requirements.
Disclosure of Invention
In order to solve the problems, the invention provides a communication method and a communication system of a virtual machine and a client machine during network isolation.
In some embodiments, the following technical scheme is adopted:
a virtual machine to client communication system upon network isolation, comprising:
the virtual machine comprises virtual serial port equipment, and the virtual serial port equipment is associated to local SOCKET equipment of the host machine;
the host machine is used as a SOCKET server and is configured to run a forwarding program, monitor a set port, receive a connection request of the client machine and open local SOCKET equipment of the virtual machine so as to forward data between the client machine and the local SOCKET equipment;
and the client, as a SOCKET client, is configured to encapsulate the local IP address and initiate a connection request to the host when communication with the virtual machine is required.
In other embodiments, the following technical solutions are adopted:
a communication method of a virtual machine and a client machine during network isolation comprises the following steps:
adding a virtual serial port device in the virtual machine, relating to a local SOCKET device of the host machine, and setting an IP address sent by the client machine as an IP address of an additional network card or a pseudo network card in the virtual machine;
the client packages the local IP address and sends a connection request to the host;
the host machine receives a connection request of the client machine and opens local SOCKET equipment corresponding to the virtual machine; forwarding data between the client and the local SOCKET device;
the virtual machine monitors a set service port needing communication, waits for a corresponding request of the local machine, and forwards data between the virtual serial port device and the set service port of the local machine.
In other embodiments, the following technical solutions are adopted:
a virtual machine comprises a virtual serial port device, wherein the virtual serial port device is associated to a local SOCKET device of a host machine; after the host machine receives the connection request of the client machine, data is forwarded between the client machine and the local SOCKET equipment;
monitoring a set service port needing communication, and waiting for a corresponding request of the local machine so as to forward data between the virtual serial port device and the set service port of the local machine.
In other embodiments, the following technical solutions are adopted:
a host machine is configured to serve as a SOCKET server, monitor a set port, and after receiving a connection request of a client, open local SOCKET equipment corresponding to a virtual machine so as to forward data between the client and the local SOCKET equipment.
In other embodiments, the following technical solutions are adopted:
a client is configured to serve as a SOCKET client, and when communication with a virtual machine is needed, a local IP address is packaged and a connection request is sent to a host machine, so that the host machine opens local SOCKET equipment corresponding to the virtual machine, and data are forwarded between the client and the local SOCKET equipment.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention builds a special channel between the virtual machine and the client machine, which is used for transmitting the controlled specific network application data; multiple application scenarios can multiplex the same channel, such as iSCSI service of 3260 port, Samba service of 445 port, and the like.
(2) The invention adopts a self-defined protocol in the channel, encapsulates a layer of header, transmits additional management data, and still transmits the original message at two ends of the channel; the client runs a forwarding program, and the host does not need to be actively connected with the client, so that the limitation caused by the gatekeeper is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a communication system between a virtual machine and a client in network isolation according to an embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Please explain the following terms:
super-fusion scene: the integration of virtual computing resources and storage resources, the hard disk of each server forms a storage pool, resources such as computing, network, safety, storage and the like required by a data center are provided in a virtualization mode, and a plurality of sets of unit devices can realize modularized seamless transverse expansion through network aggregation to form a uniform resource pool.
Virtual machine: the virtual machine is a virtual machine which exists virtually, is not a real machine, and is constructed by a host machine by utilizing hardware resources of the host machine, when a client is connected with a specific port of the host machine, a system desktop of the virtual machine constructed by the host machine can be displayed, and at the moment, a user can log in and use the virtual machine just like using a real machine, but the essence is to use the resources of the host machine.
Host machine: the host machine is a physical host machine for bearing the virtual machine, installs virtual machine management software, provides hardware resources required by the virtual machine, and supports the creation and scheduling operation of the virtual machine.
A client: the computer at the hand of the user is used for connecting a specific port of the host machine, displaying the desktop of the remote virtual machine and interacting with the virtual machine by utilizing own input equipment (a keyboard, a mouse and the like).
SOCKET equipment: the communication mechanism provided by the operating system realizes the encapsulation of a TCP/IP protocol; two communication ranges are supported, one of the two communication ranges is limited to the communication in the local machine and is represented as a file in a Linux system, and the file is called local SOCKET equipment; the second support the communication of the cross-host in the network, and the communication is represented as an abstract communication port; the SOCKET communication model comprises two roles: a server and a client.
Example one
In one or more embodiments, a communication system of a virtual machine and a client during network isolation is disclosed, which is suitable for a super-convergence scenario, and with reference to fig. 1, the whole system includes three parts, a client, a host, and a virtual machine, each of which cooperates with each other to build a dedicated channel between the virtual machine and the client, so as to transmit controlled specific network application data.
The virtual machines correspond to the client machines one by one, a virtual special channel is set up between the virtual machines and the client machines, and for each pair of virtual machine client machines, a subprocess is derived from a forwarding program in a host machine, so that a plurality of channels are supported simultaneously;
multiple application scenarios can multiplex the same channel, such as the iSCSI service of 3260, the Samba service of 445, and the like; that is, the set service port that needs to communicate may be an iSCSI service port or a Samba service port.
This embodiment will describe the scheme of the present invention in detail by taking an example of an optical disc drive device that can explore and connect clients through the iSCSI protocol inside a virtual machine.
The virtual machine comprises virtual serial port equipment, and the virtual serial port equipment is associated to local SOCKET equipment of the host machine; additionally adding a virtual network card or adding a pseudo network card device in the virtual machine, and setting the IP address sent by the client as the IP address of the additional network card or the pseudo network card.
The local socket device is a socket file of the host machine and is used for simulating a virtual serial port for the virtual machine.
The host machine is used as a SOCKET server and is configured to run a forwarding program, monitor a set port, receive a connection request of the client machine and open local SOCKET equipment corresponding to the virtual machine so as to forward data between the client machine and the local SOCKET equipment;
the client is used as a SOCKET client and is configured to encapsulate a local IP address and initiate a connection request to the host when the client needs to communicate with the client; one end of the client is connected with the set port of the host machine, and the other end of the client is connected with the set service port of the local machine which needs to communicate.
1) The host machine runs a forwarding program which is used as a SOCKET server, monitors a designated port, waits for a connection request of the client machine, then opens local SOCKET equipment, and continuously forwards data between the client machine and the local SOCKET equipment;
specifically, a forwarding program in the host machine is started as a SOCKET server side preferentially, monitors a designated port, waits for a connection request of a client, derives a child process to serve the current client after receiving the client request, and a parent process continues to wait for a new client connection request, so that the host machine can support the connection of a plurality of clients at the same time.
The host machine opens the local SOCKET equipment corresponding to the virtual machine and communicates with the virtual machine by taking the local SOCKET equipment as a medium, the local SOCKET equipment file of the host machine is represented as virtual serial port equipment inside the virtual machine, the virtual machine writes in a virtual serial port of the virtual machine, the host machine reads data from the local SOCKET equipment of the host machine, and vice versa, the host machine writes in the local SOCKET equipment file of the host machine, and the virtual machine reads data from the virtual serial port of the virtual machine;
when the host machine runs the virtual machine, an additional network card is added, or a pseudo network card device is added inside the virtual machine, the additional network card or the pseudo network card device is special for an iSCSI protocol, and a forwarding program inside the virtual machine reads the IP address of the client machine forwarded by the host machine from the virtual serial port and sets the IP address as the IP address of the additional network card or the pseudo network card.
For the Windows virtual machine, the following commands are executed to add the pseudo network card:
devcon.exe install％windir％/inf/netloop.inf*msloop
remarking: exe command requires separate download, 32 bits and 64 bits apart.
For the Linux virtual machine, no network card or pseudo network card equipment is required to be additionally added, and only the IP address of the client needs to be additionally added to the existing network card.
2) The client runs a forwarding program to serve as a SOCKET client, before actual application data is forwarded, a local IP address is packaged and sent to a host machine (the host machine forwards the actual application data to the inside of the virtual machine), and then the data is continuously forwarded between two ports;
the tgtd application in the client is an iSCSI service that adjusts its configuration parameters to include local optical drive devices for use by the iSCSI client in the virtual machine.
3) The virtual machine runs a forwarding program, firstly opens a host machine as a simulated virtual serial port device, then serves as an SOCKET server, monitors an iSCSI service port and waits for an iSCSI request of the virtual machine; the forwarding program gives consideration to the virtual serial port and the iSCSI service port, reads the IP address sent by the client from the virtual serial port and sets the IP address as the IP address of the additional network card or the pseudo network card, and continuously forwards data between the virtual serial port equipment and the iSCSI service port of the local machine.
To this point, the dedicated channel between the client and the virtual machine has been fully threaded.
The virtual machine is provided with an IP address of the client on the surface, but the IP address cannot be used for conventional network communication of a network segment to which the client belongs, and is only used for replacing the iSCSI service role of the client, so that the iSCSI client inside the virtual machine considers that a full-function iSCSI service exists in the machine.
If the virtual machine does not set the IP of the client, the iSCSI client inside the virtual machine will look for the IP of the client through network routing, which will not succeed because the network is isolated.
In this embodiment, the purpose of running a forwarding program on the client is to enhance the universality of the scheme, in some network scenarios, a gatekeeper device exists between the client and the host, and the client may actively connect to the host, but the host cannot actively connect to the client, and at this time, the client needs to first connect to the host so as to open a channel between the client and the host.
In this embodiment, a custom protocol is adopted in the channel, a layer of header is encapsulated, extra management data is transmitted, the two ends of the channel still transmit the original message, and there are currently 3 types of communication data:
1. transaction code 1, terminal registration, sending local IP and virtual machine UUID to host machine;
2. the transaction code 2 is used for disconnecting the internal client of the virtual machine;
3. transaction code 0, original message forwarding.
In this embodiment, the purpose of the forwarding program run by the host, the client, and the virtual machine is to implement communication of a data channel, and the forwarding program itself can be implemented by those skilled in the art.
Example two
In one or more embodiments, disclosed is a communication method of a virtual machine and a client during network isolation, comprising the following steps:
adding a virtual serial port device in the virtual machine, relating to a local SOCKET device of the host machine, and setting an IP address sent by the client machine as an IP address of an additional network card or a pseudo network card in the virtual machine;
the client packages the local IP address and sends a connection request to the host machine between forwarding actual data;
the host machine receives a connection request of the client machine and opens local SOCKET equipment corresponding to the virtual machine; realizing continuous data forwarding between the client and the local SOCKET equipment;
the virtual machine monitors the set service port needing communication, waits for the corresponding request of the local machine, and continuously forwards data between the virtual serial port device and the set service port of the local machine.
It should be noted that, the specific implementation manner of the foregoing process has been described in detail in the first embodiment, and is not described again for brevity.
EXAMPLE III
In one or more embodiments, a virtual machine is disclosed, comprising a virtual serial device associated to a local SOCKET device of a host; after the host machine receives the connection request of the client machine, data is forwarded between the client machine and the local SOCKET equipment;
monitoring a set service port needing communication, and waiting for a corresponding request of the local machine so as to forward data between the virtual serial port device and the set service port of the local machine.
Additionally adding a virtual network card to the virtual machine, or adding a pseudo network card device inside the virtual machine; and the IP address sent by the client is set as the IP address of the additional network card or the pseudo network card.
It should be noted that the specific working manner and implementation process of the virtual machine have been described in detail in the first embodiment, and are not described again.
Example four
In one or more embodiments, a host is disclosed, which is configured to serve as a SOCKET server, monitor a set port, and after receiving a connection request of a client, open a local SOCKET device corresponding to a virtual machine, so as to forward data between the client and the local SOCKET device.
After receiving the client request, the host derives a child process to serve the current client, the parent process continues to wait for a new client connection request, and the host can simultaneously support the connection of a plurality of clients.
It should be noted that the specific working manner and implementation process of the host have been described in detail in the first embodiment, and are not described again.
EXAMPLE five
In one or more embodiments, a client is disclosed, which is configured to serve as a SOCKET client, and when communication with a virtual machine is required, first encapsulate a local IP address and initiate a connection request to a host, so that the host opens a local SOCKET device corresponding to the virtual machine, and data is forwarded between the client and the local SOCKET device.
It should be noted that, the specific working manner and implementation process of the client are already described in detail in the first embodiment, and are not described again.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. A communication system of a virtual machine and a client when network is isolated, comprising:
the virtual machine comprises virtual serial port equipment, and the virtual serial port equipment is associated to local SOCKET equipment of the host machine;
the host machine is used as a SOCKET server and is configured to run a forwarding program, monitor a set port, receive a connection request of the client machine and open local SOCKET equipment of the virtual machine so as to forward data between the client machine and the local SOCKET equipment;
and the client, as a SOCKET client, is configured to encapsulate the local IP address and initiate a connection request to the host when communication with the virtual machine is required.
2. The system according to claim 1, wherein the client is connected to the configuration port of the host at one end and to the configuration service port of the host that needs communication at the other end.
3. The system as claimed in claim 1, wherein the virtual machine, as a SOCKET server, listens to a set service port that needs to communicate, waits for a service request corresponding to the local machine, and forwards data between the virtual serial device and the set service port of the local machine.
4. The communication system of claim 3, wherein a virtual network card is additionally added to the virtual machine, or a pseudo network card device is added inside the virtual machine; and the IP address sent by the client is set as the IP address of the additional network card or the pseudo network card.
5. A method for a virtual machine to communicate with a client during network isolation, comprising:
adding a virtual serial port device in the virtual machine, relating to a local SOCKET device of the host machine, and setting an IP address sent by the client machine as an IP address of an additional network card or a pseudo network card in the virtual machine;
the client packages the local IP address and sends a connection request to the host;
the host machine receives a connection request of the client machine and opens local SOCKET equipment corresponding to the virtual machine; forwarding data between the client and the local SOCKET device;
the virtual machine monitors a set service port needing communication, waits for a corresponding request of the local machine, and forwards data between the virtual serial port device and the set service port of the local machine.
6. A virtual machine is characterized by comprising a virtual serial port device, wherein the virtual serial port device is associated with a local SOCKET device of a host machine; after the host machine receives the connection request of the client machine, data is forwarded between the client machine and the local SOCKET equipment;
monitoring a set service port needing communication, and waiting for a corresponding request of the local machine so as to forward data between the virtual serial port device and the set service port of the local machine.
7. The virtual machine according to claim 6, wherein a virtual network card is additionally added to the virtual machine, or a pseudo network card device is added inside the virtual machine; and the IP address sent by the client is set as the IP address of the additional network card or the pseudo network card.
8. The host machine is configured to be used as a SOCKET server, monitor a set port, and open a local SOCKET device corresponding to a virtual machine after receiving a connection request of a client, so as to forward data between the client and the local SOCKET device.
9. The host of claim 8, wherein the host derives a child process to serve the current client after accepting the client request, the parent process continues to wait for new client connection requests, and the host is capable of supporting the connection of multiple clients simultaneously.
10. The client is configured to serve as a SOCKET client, encapsulate a local IP address and initiate a connection request to a host machine when communication with a virtual machine is needed, so that the host machine opens a local SOCKET device corresponding to the virtual machine, and data is forwarded between the client and the local SOCKET device.
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| CN112565372B (en) | 2023-05-09 |
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