CN111723042A - Remote high-speed USB transparent transmission method, device and equipment - Google Patents
Remote high-speed USB transparent transmission method, device and equipment Download PDFInfo
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- CN111723042A CN111723042A CN202010627074.3A CN202010627074A CN111723042A CN 111723042 A CN111723042 A CN 111723042A CN 202010627074 A CN202010627074 A CN 202010627074A CN 111723042 A CN111723042 A CN 111723042A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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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
- H04L67/08—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
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
Abstract
The embodiment of the invention discloses a remote high-speed USB transparent transmission method, a device and equipment. Wherein the method comprises the following steps: when the negotiation starting condition is met, starting the USB analog device and the local slave computer to carry out high-speed USB negotiation according to a high-speed USB protocol; after the negotiation of the remote host and the negotiation with the local slave are completed, receiving the information sent by the remote host through a network; and analyzing the information to acquire effective USB information, and sending the effective USB information to a local slave USB port. The method can get rid of the dependence on the network in the negotiation process with the host, realize the autonomous simulation negotiation, and reduce the possibility of failure of the USB high-speed negotiation mode caused by network delay.
Description
Technical Field
The invention relates to the technical field of computer communication and network security, in particular to a remote high-speed USB transparent transmission method, device and equipment.
Background
In an office environment with high security level requirements, U-KEY authentication is generally required, for example, U-KEY is required for user login authentication of public security and power. When a user operates locally, the U-KEY can be inserted into a computer USB interface (mostly USB2.0 protocol) for authentication, and if the user logs in the system remotely, the U-KEY cannot be used for connecting the computer USB interface, so that the user cannot log in the system.
In the prior art, the system can be logged in by using the U-KEY through a network. For example, the data sent by the remote host may be acquired at an application layer of the auxiliary slave, and the data may be processed to obtain the transmitted data encrypted by using the UKEY, and the data is encapsulated and simulated as the data read from the USB port of the local slave, so as to achieve the purpose of remotely accessing the system by using the UKEY.
In the process of implementing the invention, the inventor finds the following technical problems: the local slave needs to perform negotiation of the high-speed USB2.0 before receiving the analog data sent by the remote host, so that the local slave can realize handshake of the high-speed USB2.0, while the negotiation of the USB high-speed device is very sensitive to delay according to the USB2.0 protocol specification. When the USB2.0 device is transmitted across a router and a long distance, a delay, generally greater than 1ms, is introduced, thereby causing a failure in negotiation of the USB2.0 high-speed mode. Thereby causing a failure in transmitting the USB information over the network.
Disclosure of Invention
The embodiment of the invention provides a remote high-speed USB transparent transmission method, a device and equipment, which are used for solving the technical problem of high failure rate of a USB high-speed negotiation mode caused by long-distance transmission delay in the prior art.
In a first aspect, an embodiment of the present invention provides a remote high-speed USB transparent transmission method, including:
when the negotiation starting condition is met, starting the USB analog device and the local slave computer to carry out high-speed USB negotiation according to a high-speed USB protocol;
after the negotiation of the remote host and the negotiation with the local slave are completed, receiving the information sent by the remote host through a network;
and analyzing the information to acquire effective USB information, and sending the effective USB information to a local slave USB port.
Further, the negotiating the starting condition includes:
a negotiation initiation requirement of the remote host is received.
Further, the negotiating the starting condition includes:
the preset time negotiates the start conditions.
Further, the receiving a negotiation initiation requirement of the remote host includes:
receiving information that a remote host has started remote USB protocol negotiation;
or
Time information is received at which the remote host expects to initiate a remote USB protocol negotiation.
Further, the starting of the USB analog device according to the high-speed USB protocol to perform the high-speed USB negotiation with the local slave includes:
detecting an SE0 signal lasting for more than 2.5us by using a USB analog device, and sending a Chirp K signal to the bus for more than 1ms and less than 7 ms;
after 3 KJ signals are detected, the pull-up resistor on DP is disconnected within 500us and the high speed termination resistors to ground on D + and D-are connected.
In a second aspect, an embodiment of the present invention further provides a remote high-speed USB transparent transmission device, including:
the starting module is used for starting the USB analog device to carry out high-speed USB negotiation with the local slave according to a high-speed USB protocol when a negotiation starting condition is met;
the receiving module is used for receiving the information sent by the remote host through the network after the negotiation of the remote host and the negotiation with the local slave are completed;
and the sending module is used for analyzing the information, acquiring effective USB information and sending the effective USB information to a local slave USB port.
Further, the negotiating the starting condition includes:
a negotiation initiation requirement of the remote host is received.
Further, the receiving a negotiation initiation requirement of the remote host includes:
receiving information that a remote host has started remote USB protocol negotiation;
or
Time information is received at which the remote host expects to initiate a remote USB protocol negotiation.
Further, the negotiating the starting condition includes:
the preset time negotiates the start conditions.
Further, the starting module comprises:
the checking unit is used for checking an SE0 signal lasting for more than 2.5us by using a USB analog device, sending a Chirp K signal to the bus, and lasting for more than 1ms and less than 7 ms;
and the disconnection unit is used for disconnecting the pull-up resistor on the DP within 500us after the KJ signal is detected for 3 times and connecting the high-speed termination resistors to the ground on the D + and the D-.
According to the remote high-speed USB transparent transmission method, the device and the equipment provided by the embodiment of the invention, when a negotiation starting condition is met, negotiation with a slave is started according to a high-speed USB protocol, and the negotiation starting condition and a remote host are determined in advance through network communication; and receiving negotiation completion information of the remote host, and after the negotiation with the slave is completed, bidirectionally transmitting data with the remote host through a network. The negotiation with the high-speed USB of the slave can be automatically completed by combining software and hardware and utilizing the prior negotiation starting condition when the network dependence is eliminated. And after the negotiation is finished, the information remote transmission is realized by using the network. The method can get rid of the dependence on the network in the negotiation process with the host, realize the autonomous simulation negotiation, and reduce the possibility of failure of the USB high-speed negotiation mode caused by network delay.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic flow chart of a remote high-speed USB transparent transmission method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a remote high-speed USB transparent transmission method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a remote high-speed USB transparent transmission device according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic flow chart of a method for providing remote high-speed USB transparent transmission according to an embodiment of the present invention, where the embodiment is applicable to a case where remote high-speed USB transparent transmission is implemented by using a remote network, and the method can be executed by a remote high-speed USB transparent transmission method apparatus, and the apparatus can be implemented by software and hardware, and specifically includes the following steps:
and S110, when the negotiation starting condition is met, starting the USB analog device to perform high-speed USB negotiation with the local slave according to the high-speed USB protocol.
When the system login is locally realized, a user only needs to insert the UKEY into the USB port, the UKEY can realize the handshake between the host and the UKEY through a series of hardware electronic signal interaction with the host, then corresponding data can be read from the UKEY, and the normal access to the system is realized through later-stage encryption operation and the like.
However, when the remote login is implemented by using the internet, even though the slave can implement the simulated UKEY to implement the handshake with the host through the USB port according to the information sent by the host, the network will generate a corresponding delay, and the requirement for the time limit in the handshake process is very strict, so that the handshake fails, and the remote system login cannot be implemented in an analog manner.
In this embodiment, the method may be implemented by taking a proxy module configured on a local slave as a main body. The local slave computer can be a PC (personal computer) which is arranged in a local network, can directly log in the system by using UKEY (universal key exchange) and can realize network connection with a remote host computer through the Internet. Correspondingly, the remote host may be a PC connected to the UKEY but not on the local network. The remote host can realize network connection with the local slave through the internet. The remote host can also be provided with a host proxy module which is used for sending the data encrypted by the UKEY to the USB proxy module of the local slave machine through the network and sending other related instruction information to the local slave machine.
When the remote login is needed, the user can insert the UKEY into the USB port of the remote host to realize the high-speed USB negotiation of the host. And the negotiation setting condition can be sent to the slave agent module by the master agent module in advance. After receiving the corresponding information, the USB agent module of the slave computer starts the USB analog device according to the high-speed SB protocol to perform high-speed USB negotiation with the local slave computer when the negotiation starting condition is met
In this embodiment, the proxy module of the slave may implement handshake electrical signal interaction with the slave according to a high-speed USB protocol, for example, a USB2.0 protocol, when a negotiation start condition is satisfied, and may implement negotiation without depending on corresponding electrical signal information sent by the host.
The negotiation starting condition can be determined according to actual conditions. Generally, after the handshake is successfully achieved through the local slave by using the USB analog device, the system login needs to be completed within a certain time, otherwise, the high-speed USB negotiation needs to be performed again because there is no operation for a long time. Or after the high-speed USB negotiation is successful for a long time, the security data is easily leaked. Therefore, in this embodiment, the negotiation initiation condition is related to the high-speed USB negotiation time corresponding to the remote host. Illustratively, the negotiation starting condition may include: the preset time negotiates the start conditions. Namely, a certain time node is preset, a USB analog device is utilized to perform high-speed USB negotiation with a local slave,
When the negotiation starting condition is determined to be met, the negotiation with the slave machine can be started according to the high-speed USB protocol. In this embodiment, a single chip or other devices may be used to simulate the USB device to perform electrical signal transmission with the slave port, so as to implement high-speed handshake between the slave and the proxy module, and the negotiation with the slave is started according to a high-speed USB protocol, which may include: after checking the SE0 signal lasting more than 2.5us, a chirp signal is sent to the bus for more than 1ms and less than 7ms, and after detecting 3 KJ signals, the pull-up resistor on DP must be disconnected and the high-speed termination resistors on D + and D-to-ground must be connected within 500 us. High speed USB handshaking with the slave is achieved.
And S120, after the negotiation of the remote host and the negotiation with the local slave are completed, receiving the information sent by the remote host through the network.
In this embodiment, the user may insert a UKEY on the remote host and use the UKEY to complete the high-speed USB negotiation with the remote host. Only after the remote host high-speed USB negotiation is completed, the corresponding encryption or other functions can be realized by using the UKEY. Therefore, it is necessary to determine whether the conditions of the slave device completing the USB negotiation and the host device completing the USB negotiation are met, and receive the information sent by the remote host device through the network under the conditions.
For example, receiving the information sent by the remote host via the network may include: the message obtained from the ethernet interface, the message content may include: USB protocol data and general data, source ethernet address and destination ethernet address.
S130, analyzing the information to obtain effective USB information, and sending the effective USB information to a local slave USB port.
In this embodiment, the information sent by the remote host through the host proxy module may be parsed to achieve the goal of being consistent with the data entered into the remote host using UKEY. For example, whether the received data is data for the local slave that is sent by the remote host proxy module may be determined according to the destination ethernet address, whether the received data is data that needs to be processed may be determined by acquiring the valid USB information source ethernet address, valid USB information may be acquired according to the USB protocol data and the general data, and the valid USB information may be sent to the USB port of the local slave by using the USB simulation apparatus, so as to achieve the purpose of completely simulating normal use of the UKEY login system in the local slave.
In the embodiment, when a negotiation starting condition is met, negotiation with a slave is started according to a high-speed USB protocol, wherein the negotiation starting condition is determined in advance through network communication with a remote host; and receiving negotiation completion information of the remote host, and after the negotiation with the slave is completed, bidirectionally transmitting data with the remote host through a network. The negotiation with the high-speed USB of the slave can be automatically completed by combining software and hardware and utilizing the prior negotiation starting condition when the network dependence is eliminated. And after the negotiation is finished, the information remote transmission is realized by using the network. The method can get rid of the dependence on the network in the negotiation process with the host, realize the autonomous simulation negotiation, and reduce the possibility of failure of the USB high-speed negotiation mode caused by network delay.
Example two
Fig. 2 is a schematic flow chart of a remote high-speed USB transparent transmission method according to a second embodiment of the present invention. In this embodiment, the negotiation starting condition is specifically optimized as follows: a negotiation initiation requirement of the remote host is received. Correspondingly, the remote high-speed USB transparent transmission method provided in this embodiment specifically includes:
and S210, when a negotiation starting requirement of the remote host is received, starting the USB analog device according to a high-speed USB protocol to perform high-speed USB negotiation with the local slave.
In this embodiment, the receiving of the negotiation initiation requirement of the remote host may include: receiving information that a remote host has started remote USB protocol negotiation; or receive time information that the remote host expects to initiate a remote USB protocol negotiation. Typically slave initiated high speed USB interface negotiation is initiated by the intent of the host to use UKEY telnet. Therefore, the slave high-speed USB negotiation needs to be performed according to the negotiation start request of the remote host.
Therefore, in the present embodiment, the information that the remote host has started the remote USB protocol negotiation may be received as the negotiation starting condition. The method can send corresponding information to the slave computer when a user inserts the UKEY by using the remote host, and negotiate with the slave computer according to the high-speed USB protocol when receiving the information for starting the remote USB protocol negotiation sent by the remote host. And further, the purpose of logging in the system by using the UKEY through the remote host is realized.
Optionally, because there is network delay, receiving information that the remote host has started the remote USB protocol negotiation as the negotiation starting condition may cause the slave USB negotiation to slightly lag behind, in this embodiment, time information that the remote host expects to start the remote USB protocol negotiation may be received, and the time information may be used as the negotiation starting condition. The problem that the host and the slave high-speed USB negotiation completion time is inconsistent due to network delay is solved. The response speed of the slave is improved. So that the user can get the same experience of logging in to the system locally with UKEY.
And S220, after the negotiation of the remote host and the negotiation with the local slave are completed, receiving the information sent by the remote host through the network.
And S230, analyzing the information to obtain effective USB information, and sending the effective USB information to a local slave USB port.
In this embodiment, the negotiation starting condition is specifically optimized as follows: a negotiation initiation requirement of the remote host is received. A high speed USB negotiation acknowledgement with a slave may be initiated based on the action of the remote host. The condition that the high-speed USB port of the slave machine is occupied for a long time can be avoided, and the problem that other malicious programs utilize the slave machine to log in the system to cause system risks can also be avoided.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a remote high-speed USB transparent transmission device according to a third embodiment of the present invention, and as shown in fig. 3, the device includes:
the starting module 310 is configured to start the USB analog device to perform a high-speed USB negotiation with the local slave according to a high-speed USB protocol when a negotiation starting condition is satisfied;
the receiving module 320 is configured to receive, through a network, information sent by a remote host after a negotiation with the remote host and a negotiation with a local slave are completed;
and the sending module 330 is configured to analyze the information, acquire valid USB information, and send the valid USB information to a local slave USB port.
The remote high-speed USB transparent transmission device provided in this embodiment starts negotiation with the slave according to the high-speed USB protocol when a negotiation start condition is satisfied, where the negotiation start condition is determined in advance through network communication with the remote host; and receiving negotiation completion information of the remote host, and after the negotiation with the slave is completed, bidirectionally transmitting data with the remote host through a network. The negotiation with the high-speed USB of the slave can be automatically completed by combining software and hardware and utilizing the prior negotiation starting condition when the network dependence is eliminated. And after the negotiation is finished, the information remote transmission is realized by using the network. The method can get rid of the dependence on the network in the negotiation process with the host, realize the autonomous simulation negotiation, and reduce the possibility of failure of the USB high-speed negotiation mode caused by network delay.
On the basis of the foregoing embodiments, further, the negotiating a starting condition includes:
a negotiation initiation requirement of the remote host is received.
On the basis of the foregoing embodiments, the receiving a negotiation initiation requirement of the remote host includes:
receiving information that a remote host has started remote USB protocol negotiation;
or
Time information is received at which the remote host expects to initiate a remote USB protocol negotiation.
On the basis of the foregoing embodiments, the negotiating start condition includes:
the preset time negotiates the start conditions.
On the basis of the above embodiments, the starting module includes:
the checking unit is used for checking an SE0 signal lasting for more than 2.5us by using a USB analog device, sending a Chirp K signal to the bus, and lasting for more than 1ms and less than 7 ms;
and the disconnection unit is used for disconnecting the pull-up resistor on the DP within 500us after the KJ signal is detected for 3 times and connecting the high-speed termination resistors to the ground on the D + and the D-.
The remote high-speed USB transparent transmission device provided by the embodiment of the invention can execute the remote high-speed USB transparent transmission method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
An embodiment of the present invention further provides an apparatus, where the apparatus may include: the slave proxy module comprises any one of the remote high-speed USB transparent transmission devices provided by the above embodiments. The slave agent module can be realized in a software mode and has a corresponding network transmission function, and the USB analog device is used for carrying out high-speed USB negotiation with a local slave by utilizing an electric signal and realizing signal transmission with the slave.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A remote high-speed USB transparent transmission method is characterized by comprising the following steps:
when the negotiation starting condition is met, starting the USB analog device and the local slave computer to carry out high-speed USB negotiation according to a high-speed USB protocol;
after the negotiation of the remote host and the negotiation with the local slave are completed, receiving the information sent by the remote host through a network;
and analyzing the information to acquire effective USB information, and sending the effective USB information to a local slave USB port.
2. The method of claim 1, wherein negotiating the initiation condition comprises:
a negotiation initiation requirement of the remote host is received.
3. The method of claim 1, wherein negotiating the initiation condition comprises:
the preset time negotiates the start conditions.
4. The method of claim 2, wherein receiving a negotiation initiation requirement for a remote host comprises:
receiving information that a remote host has started remote USB protocol negotiation;
or
Time information is received at which the remote host expects to initiate a remote USB protocol negotiation.
5. The method of claim 1, wherein the initiating the USB analog device to perform the high-speed USB negotiation with the local slave according to the high-speed USB protocol comprises:
detecting an SE0 signal lasting for more than 2.5us by using a USB analog device, and sending a Chirp K signal to the bus for more than 1ms and less than 7 ms;
after 3 KJ signals are detected, the pull-up resistor on DP is disconnected within 500us and the high speed termination resistors to ground on D + and D-are connected.
6. A remote high-speed USB transparent transmission device is characterized by comprising:
the starting module is used for starting the USB analog device to carry out high-speed USB negotiation with the local slave according to a high-speed USB protocol when a negotiation starting condition is met;
the receiving module is used for receiving the information sent by the remote host through the network after the negotiation of the remote host and the negotiation with the local slave are completed;
and the sending module is used for analyzing the information, acquiring effective USB information and sending the effective USB information to a local slave USB port.
7. The apparatus of claim 6, wherein the negotiation initiation condition comprises:
a negotiation initiation requirement of the remote host is received.
8. The apparatus of claim 7, wherein the receiving of the negotiation initiation requirement of the remote host comprises:
receiving information that a remote host has started remote USB protocol negotiation;
or
Time information is received at which the remote host expects to initiate a remote USB protocol negotiation.
9. An apparatus, characterized in that the apparatus comprises:
a slave agent module comprising the remote high-speed USB pass-through device of claim 6;
and the USB analog device is used for carrying out high-speed USB negotiation with the local slave computer by utilizing the electric signal.
10. The apparatus of claim 9, wherein the USB analog device is a single chip.
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