CN100435511C - Simulation system and method for client terminal, server and character terminals - Google Patents
Simulation system and method for client terminal, server and character terminals Download PDFInfo
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- CN100435511C CN100435511C CNB2005100803735A CN200510080373A CN100435511C CN 100435511 C CN100435511 C CN 100435511C CN B2005100803735 A CNB2005100803735 A CN B2005100803735A CN 200510080373 A CN200510080373 A CN 200510080373A CN 100435511 C CN100435511 C CN 100435511C
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Abstract
The present invention discloses a client terminal in order to simulate a PC with a Windows operating system into a character terminal. The client terminal comprises a main control unit, a communication unit, a telnet protocol unit and a character display protocol unit, wherein the main control unit is used for controlling each unit of the client terminal and establishing a window on a screen of the client terminal; the communication unit is used for establishing the TCP/IP connection between the client terminal and a server; the telnet protocol unit is used for remotely loginning the server from the client terminal by using the telnet protocol; the character display protocol unit displays terminal display data sent from the server through the connection in the window of the client terminal screen according to the character display protocol. The present invention also discloses a kind of server and a method which carries out character simulation by using the client terminal and the server.
Description
Technical field
The present invention relates to the cross operating system system program and carry out the field, mainly relate under the Windows environment, simulate the system and method for UNIX character terminal by emulation, and corresponding client terminal and server.
Background technology
In a lot of large enterprises, all adopt server concatenation character terminal mode to carry out the routine work operation.Wherein server generally adopts the Unix platform, and character terminal adopts special equipment substantially, by serial extended unit, uses private line access between Unix server and the character terminal.
Because adopt private-line mode, so unless Unix server and character terminal add other private network devices, otherwise distance can not be too far away; Simultaneously, the PC of Windows is popularized in a large number in each enterprise at present, and the foreground business personnel is because professional expansion often need be operated Windows system and character terminal simultaneously, and all in the networking of giving enterprise, difficulty is brought in aspects such as hardware investment for these.
Summary of the invention
The present invention is mainly solved over needs the Unix program of control character terminal peripheral hardware, can only on special equipments such as character terminal, carry out, and can not be in the situation of the normal operation of Windows environment.
In one aspect of the invention, provide a kind of client terminal, having comprised: main control unit is used to control each unit of client terminal, and sets up window on the screen of client terminal; Communication unit, the TCP/IP that is used to set up between client terminal and the server connects; The Telnet unit is used to utilize Telnet from the client terminal telnet server; And character display protocol unit, the terminal video data that sends from server by described connection is presented at the described window on the client terminal screen according to the character display protocol, described client terminal also comprises: the peripheral hardware control unit, be used for receiving from main control unit after the peripheral hardware control open command that send, that send from server, all data of receiving from main control unit directly are forwarded to peripheral hardware, up to receiving the peripheral hardware out code, and the feedback data that will receive from peripheral hardware feeds back to server in real time.
In one aspect of the invention, provide a kind of server, having comprised: the agent communication unit is used for setting up TCP/IP and connects between server and client terminal; Retransmission unit is used for only making legal client terminal logon server to will filtering with the client terminal of logon server by described connection; And monitoring unit, client terminal is mapped as a logical device of server, and when receiving the user, its application program that will give server is handled from the data of client terminal input, and, feed back to client terminal to the data that server application sends.
In another aspect of this invention, provide a kind of character terminal analogue system that comprises above-mentioned client terminal and/or server.
In still another aspect of the invention, provide a kind of in the system that comprises client terminal and server the method for emulation character terminal, comprising: the TCP/IP that sets up between described client terminal and the server connects; To will filtering with the client terminal of logon server, only make legal client terminal logon server by described connection; Client terminal is mapped as a logical device of server, and when receiving the user, its application program that will give server is handled, and, fed back to client terminal the data that server application sends from the data of client terminal input; Being presented on the client terminal screen according to the character display protocol from the terminal video data that server sends by described connection.
The present invention has effectively realized carrying out character terminal application program under the Unix environment in emulation on the Windows, its effect and advantage mainly in the following areas:
1), PC has been extended to 1 or many Unix character terminals: owing to adopted emulation technology, make the PC of windows platform not only can carry out prior application program on the PC, can also pass through the virtual terminal technology, application program on the long-range execution Unix server, and local peripheral hardware is controlled in the instruction that can send according to the Unix server.Because Windows is a cover multi-task operation system, and the user can start repeatedly client-side program, lands the Unix server respectively,, simulation simulates the function of many character terminal machines simultaneously simultaneously thereby having realized a PC.
2), owing to adopt the TCP/IP communication between client terminal and the server, can effectively utilize a large amount of at present local area network (LAN) and wide area networks of popularizing like this, replacing in the past, a character terminal need draw the network architecture to Unix server special line.
3), native system passes by simple Telnet simulated program relatively, mainly contains following advantage:
A), authentication techniques have been adopted between client terminal and the server: owing to adopted authentication techniques, can guarantee the PC only registered can pass through virtual terminal technology telnet Unix server in service end.
B) communication data encryption technology:, can prevent that like this disabled user from adopting the means of network monitoring, obtains the account number of landing the Unix server user, sensitive datas such as password because the data between server and the client terminal are encrypted.
C) peripheral hardware Driving technique: adopted the incident triggering mode to drive peripheral hardware, make the character terminal analogue system to do special programming at the various peripheral hardwares on the market, just can drive various types of external equipments, because the control command of its external equipment is initiated by the application program on the Unix server fully.
Description of drawings
Fig. 1 shows the system construction drawing of one embodiment of the invention;
Fig. 2 shows the structure chart of the character terminal of one embodiment of the invention;
Fig. 3 shows the structure chart of the server of one embodiment of the invention;
Fig. 4 shows the flow chart of carrying out method of the present invention.
Embodiment
To contrast accompanying drawing below, technical scheme of the present invention will be described in detail.
The structure chart of native system as shown in Figure 1.
Among Fig. 1, Unix server 100 is application servers of enterprise, and it has realized the server in the character analogue system of the present invention.
With the TCP/IP communication, it has realized the client terminal in the character analogue system of the present invention between PC 300 and the Unix server 100.
Fig. 2 shows the pie graph of client terminal according to an embodiment of the invention.As shown in Figure 2, windows client terminal of the present invention comprises main control unit, encryption/decryption element, peripheral hardware control unit, Telnet unit, character display protocol unit, condition code generation unit and communication unit.
Fig. 3 shows the pie graph of server according to an embodiment of the invention.As shown in Figure 3, unix server of the present invention comprises: the agent communication unit, act on behalf of the application program under encryption/decryption element, retransmission unit piece, monitoring unit and the unix.
Among Fig. 2, main control unit 1 is responsible at first setting up a window on the screen of client terminal, this window will show that this client terminal lands the picture of Unix server with character mode, its menu display function, is finished by character display protocol unit 6 after receiving the instruction that server is sent by main control unit 1; The client terminal at main control unit 1 place and Unix server adopt Telnet to carry out communication on the Tcp/Ip basis, this partial content by the agent communication unit, act on behalf of encryption/decryption element and monitoring unit is finished jointly.After receiving the peripheral hardware control command of sending from server, main control unit is finished control to the local peripheral hardware of client terminal by the peripheral hardware control unit.For example: after receiving that opening serial ports instructs, main control unit all sends the data of receiving to peripheral hardware, with the data of receiving, sends to serial ports by peripheral hardware; Till receiving that main control unit receives that closing serial ports instructs.Because the client terminal at main control unit place and server are with the communication of Tcp/Ip mode, the client terminal of main control unit is to land Unix server picture with the window mode simulation demonstration of Window platform simultaneously, thereby guaranteed that a PC can simulate many character terminal telnet Unix servers simultaneously when not influencing local other application programs.
Condition code generation unit 2 has only the machine by checking just can land the Unix server in order to guarantee, the sequence number of IP, CPU, hard disk and the network interface card of client terminal is responsible for reading in this unit, and each sequence number is chained together forms the condition code of this machine, simultaneously condition code is passed through manual type, copy in the Unix server data file, like this, when client terminal lands the Unix server by being connected with server agent, but agency's scan data file determines whether client is illegal connection.
Encryption/decryption element 4 guarantees that the data between PC and the Unix server can access secret, also be for the old Unix operating system of compatibility simultaneously, encryption technology has been adopted in communication between PC and Unix server, this element is corresponding to the encryption/decryption element of acting on behalf of on the Unix server, both sides have adopted Diffe-hellman algorithm (a kind of Diffie-Hellman with Di Fu-He Erman name) exchange Public key, and adopt Joseph's algorithm that data have each other been carried out encryption and decryption.
Telnet unit 5 is described below, Telnet agreement for example, it is a kind of Telnet, provide one general relatively, two-way, towards the communication mechanism of eight bit byte.Its main target is to allow the process of interface terminal equipment and terminaloriented to be undertaken alternately by a standard procedure.Native system adopts this agreement as the client terminal of character terminal analogue system and the communication standard between the server.
About character display protocol unit 6, Vt100 agreement for example, it is a kind of character display protocol, and the definition such as character set of the character position that shows at the character terminal picture, character attibute, keyboard input are provided.In native system, explain the picture control command that execution is received from server according to this standard, and, show the data of receiving from server at the client terminal window according to the instruction of receiving.
Peripheral hardware control unit 7 is used for the peripheral hardware control open command of sending from the Unix server that receiving that main control unit 1 sends over, as: after receiving that opening serial ports instructs, peripheral hardware control unit 7 is responsible for all data of receiving from main control unit directly are forwarded to peripheral hardware, up to receive the peripheral hardware out code as: close the serial ports instruction.During this time, if be provided with feedback information outward, (as: after the instruction of inquiry printer modes that Unix sends, will initiate return the peripheral hardware state) to the peripheral hardware monitoring unit, the peripheral hardware control unit is responsible for the feedback data that will receive, directly sends to the Unix server.Like this, the peripheral hardware control command of application program is initiated by the Unix server fully, and the character terminal simulated program only is responsible for dynamically transmitting.Thereby guaranteed that the character terminal simulated program is made under the situation of any modification on not to the application program of former Unix server and PC, the original program that can carry out of character terminal equipment, still can the character terminal simulated program on PC in Simulation execution.
Fig. 3 shows the pie graph of server according to an embodiment of the invention.As shown in Figure 3, agent communication unit 8 for example is the monitoring process of Unix server, is responsible for setting up TCP/IP with the Windows client terminal and is connected..
Act on behalf of the encryption/decryption element pairing in encryption/decryption element 9 and the client terminal of the present invention, be responsible for communication data is carried out encryption and decryption.Both sides' key can transmit with the Diffe-hellman algorithm, and both sides' encryption and decryption can adopt multiple moulding algorithm, and in order to accelerate arithmetic speed, and system has adopted Joseph's algorithm to carry out enciphering and deciphering algorithm.
When client terminal is set up the communication connection with the Unix server first, this acts on behalf of encryption/decryption element 9 and also is responsible for and will compares from the condition code data file that the condition code that client terminal receives is deposited with this organizational security, with the Windows client terminal of definite telnet validated user whether.
As follows among Sco Unix server/etc/inted.conf about the configuration file of telnet agreement:
Former configuration: telnet stream tcp nowait NOLUID/etc/telnetd telnetd
Revise the back configuration: telnet stream tcp nowait NOLUID/etc/vt 100telnetd
Illustrate: by with in the configuration file "/etc/telnetd " be revised as independently developed "/etc/vt100 " application program, the telnetd that the past was started self by telnetd changes into by retransmission unit and to start.Thereby realized that retransmission unit 11 filters the function of remote terminal login.
In native system, retransmission unit 11 receives only the agent communication unit from this machine (IP address: the Tcp/Ip communication bag that 127.0.0.1) sends, the request that the Telnet that other IP addresses are sent lands all can be refused, thereby prevents that effectively external system from illegally landing the Unix server.
Below in conjunction with Fig. 4 handling process of the present invention is described.
Step 100: set up an application window on the screen of client terminal, simultaneously by main control unit controlling features sign indicating number generation unit, read this machine condition code, its condition code comprises the sequence number of hardware such as this machine IP, CPU, network interface card, hard disk.
Step 101: the main control unit control communication unit of client terminal is set up TCP/IP with server agent communication unit and is connected, adopt the Diffe-hellman algorithm to generate Public key simultaneously, and after condition code is connected data with request and passes through Joseph's algorithm for encryption, send to the agent communication unit and the encryption/decryption element of server, the two is collectively referred to as agent unit.
Step 102: the encryption/decryption element in the agent unit, utilize the Diffe-hellman algorithm to generate Public key and adopt Joseph's algorithm data decryption, while scanning of home data file, the condition code that affirmation deciphers is out registered at this machine.
Step 103: if confirm that condition code is legal data, agent unit will send to retransmission unit from the data that client terminal is received.
Step 104: retransmission unit is responsible for filtering all are connected to server by Telnet communication bag, if confirming data sends by agent unit, then turn to step 105, if not what send from agent unit, then may be illegal connection, retransmission unit will be closed the communication connection request that client terminal sends.
Step 105: the telnetd application program that the data forwarding after agent unit will be deciphered carries to the Unix server.
Step 106:Unix server telnetd virtual terminal service routine will be received data and instruction submission Unix server explanation execution.
Step 107:Unix server will explain that execution result feeds back to agent unit by monitoring unit.
Step 108: agent unit utilizes Public key to adopt Joseph's algorithm, after data encryption, is restored to the communication unit of client terminal.
Step 109: after client terminal receives data, utilize Public key, adopt Joseph's algorithm, data decryption.
Step 110: the main control unit of client terminal judges whether the data of receiving are the instruction of character display protocol, and Vt100 protocol instructions for example is if forward step 111 to, otherwise forward step 112 to.
Step 111: main control unit control character display protocol unit, simultaneously according to the instruction and data of receiving, the application program picture that sends in character terminal screen displayed service end.
Step 112: the main control unit of client terminal judges whether the data of receiving are the Telnet instruction, and telnet protocol instructions for example is if forward step 113 to, otherwise forward step 114 to.
Step 113: main control unit control Telnet unit, the instruction of receiving is resolved, and analysis result is fed back to server by step 119.
Step 114: the main control unit of client terminal judges whether the data of receiving are the peripheral hardware control command, if then forward step 115 to, otherwise forward step 116 to.
Step 115: main control unit control peripheral hardware control unit, instruction executions that make an explanation to peripheral hardware instructs to turn to relevant peripheral hardware to be dealt into local peripheral hardware.
Step 116: if the external equipment of client terminal after receiving the peripheral hardware control command, has data need feed back to server at once, and forward step 119 to, otherwise forward step 117 to.
Step 117: client's keyboard input is waited for and received to main control unit.
Step 118: if the client has imported the shutdown system instruction, promptly close client terminal, then client terminal close and server between communication connect, and finish.Otherwise forward step 119 to.
Step 119: the ciphering unit of client terminal with data encryption after, send to server by agent unit and explain to carry out.
The above; only be the embodiment among the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the conversion that can expect easily or replacement all should be encompassed in of the present invention comprising within the scope.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (12)
1, a kind of client terminal comprises:
Main control unit is used to control each unit of client terminal, and sets up window on the screen of client terminal;
Communication unit, the TCP/IP that is used to set up between client terminal and the server connects;
The Telnet unit is used to utilize Telnet from the client terminal telnet server; And
Character display protocol unit is presented at the terminal video data that sends from server by described connection the described window on the client terminal screen according to the character display protocol;
It is characterized in that described client terminal also comprises:
The peripheral hardware control unit, be used for receiving from main control unit after the peripheral hardware control open command that send, that send from server, all data of receiving from main control unit directly are forwarded to peripheral hardware, up to receiving the peripheral hardware out code, and the feedback data that will receive from peripheral hardware feeds back to server in real time.
2, client terminal as claimed in claim 1 is characterized in that, also comprises:
The condition code generation unit, be used to read client terminal IP, CPU, hard disk and network interface card sequence number one of at least, to form the condition code of described client terminal.
3, client terminal as claimed in claim 2 is characterized in that, also comprises:
Be arranged on the encryption/decryption element between main control unit and the communication unit, be used to adopt Di Fu-He Erman Diffie-Hellman between client terminal and server, to exchange Public key, and adopt Joseph's algorithm that data have each other been carried out encryption and decryption.
As the described client terminal of one of claim 1-3, it is characterized in that 4, described Telnet is the telnet agreement, described character display protocol is the Vt100 agreement.
5, client terminal as claimed in claim 4 is characterized in that, described client terminal operation windows operating system, described server operation Unix operating system.
6, a kind of character terminal analogue system that comprises client terminal as claimed in claim 1.
7, a kind of in the system that comprises client terminal as claimed in claim 1 and server the method for emulation character terminal, comprising:
The TCP/IP that sets up between described client terminal and the server connects;
To wanting the client terminal of logon server to filter, only make legal client terminal logon server by described connection;
Client terminal is mapped as a logical device of server, and when receiving the user, its application program of giving server is handled, and, fed back to client terminal the data that server application sends from the data of client terminal input;
Being presented on the client terminal screen according to the character display protocol from the terminal video data that server sends by described connection.
8, method as claimed in claim 7, it is characterized in that, before connecting, read client terminal IP, CPU, hard disk and network interface card sequence number one of at least, forming the condition code of described client terminal, and the form of described condition code with file is stored in the server.
9, method as claimed in claim 7 is characterized in that, also comprises the step of the data that send being carried out encryption and decryption between client terminal and server.
10, method as claimed in claim 7, it is characterized in that, receiving from main control unit after the peripheral hardware control open command that send, that send from server, all data of receiving from main control unit directly are forwarded to peripheral hardware, up to receiving the peripheral hardware out code, and the feedback data that will receive from peripheral hardware directly sends to server.
As the described method of one of claim 7-10, it is characterized in that 11, described Telnet is the telnet agreement, described character display protocol is the Vt100 agreement.
12, method as claimed in claim 11 is characterized in that, described client terminal operation windows operating system, described server operation Unix operating system.
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| CNB2005100803735A CN100435511C (en) | 2005-07-04 | 2005-07-04 | Simulation system and method for client terminal, server and character terminals |
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| CNB2005100803735A CN100435511C (en) | 2005-07-04 | 2005-07-04 | Simulation system and method for client terminal, server and character terminals |
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| CN100435511C true CN100435511C (en) | 2008-11-19 |
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| CN103841115B (en) * | 2014-03-21 | 2017-02-08 | 成都安恒信息技术有限公司 | Character terminal command real-time approval method and application layer structure |
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| CN1353390A (en) * | 2000-11-07 | 2002-06-12 | 黄立民 | Computer terminal for financial system |
| CN1536499A (en) * | 2003-04-07 | 2004-10-13 | 华为技术有限公司 | Method for accessing remote terminal in UNIX cenvironment |
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- 2005-07-04 CN CNB2005100803735A patent/CN100435511C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2002027492A1 (en) * | 2000-09-26 | 2002-04-04 | Appstream, Inc. | Method and system for streaming software applications to a client |
| CN1353390A (en) * | 2000-11-07 | 2002-06-12 | 黄立民 | Computer terminal for financial system |
| CN1536499A (en) * | 2003-04-07 | 2004-10-13 | 华为技术有限公司 | Method for accessing remote terminal in UNIX cenvironment |
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| 通过TCP/IP网络访问MS－DOS应用文件. 王玉林.计算机时代，第12期. 1998 |
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