CN100395735C - Method for accessing remote terminal in UNIX cenvironment - Google Patents
Method for accessing remote terminal in UNIX cenvironment Download PDFInfo
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- CN100395735C CN100395735C CNB031092462A CN03109246A CN100395735C CN 100395735 C CN100395735 C CN 100395735C CN B031092462 A CNB031092462 A CN B031092462A CN 03109246 A CN03109246 A CN 03109246A CN 100395735 C CN100395735 C CN 100395735C
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Abstract
The present invention discloses a method for accessing remote terminals in UNIX environment. A physical terminal is connected with a terminal access server connected with a service front-end processor over a network. The method comprises the following steps: a. a configuration file is compiled in the service front-end processor of a UNIX system, and the fixed corresponding relationship between the physical terminal accessing the service front-end processor via the terminal access server and the name of a pseudo terminal device on the service front-end processor is established; b. a list making the system open a pseudo terminal slave device is added in order to accept the login of the physical terminal; c. an interface preset on the service front-end processor is started to drive a functional module, and the pseudo terminal device is opened; d. a transmission control connection request in a network is monitored, and whether the connection is started by the configured physical terminals is verified, if true, then the physical terminal is corresponding to the pseudo terminal main device, else the connection is rejected.
Description
Technical field
The present invention relates to field of computer technology, be meant the method that a kind of unix environment medium-long range terminal inserts especially.
Background technology
Using various terminal carrying out service to handle in a large number in fields such as bank, financial industry or mail systems.Along with the development of these industries, business processing will be concentrated to supervising authority gradually.Therefore, need great amount of terminals to log on the server of operation business application, i.e. operation is handled in the enterprising industry affair of service front-end processor.Several terminal access modes below general at present the employing.
Figure 1 shows that the direct access service front end processor of physical terminal mode.Physical terminal 101 is directly connected on the service front-end processor 103 by physical circuit multi-serial-port card 102, is linked to each other with professional main frame 104 through network by service front-end processor again.Owing to be to adopt physics mode directly to connect, therefore service front-end processor can distribute fixing terminal device name to these physical terminals that land on it in system, be that each physical terminal all is to land and move application program on the service front-end processor by a fixed terminal equipment name at every turn, finish business handling.Use this connected mode, each physical terminal must be directly connected on the service front-end processor, and therefore, service front-end processor generally all is placed on the site of transacting business, numerous and when disperseing when the service network number of spots, there is big difficulty in the maintenance of service front-end processor system.Along with professional development such as financial industry, postal field, business processing is concentrated to supervising authority gradually, service front-end processor and physical terminal need be separated at a distance, and this connected mode obviously can't satisfy demand for development.
Figure 2 shows that physical terminal is through multiplexer access service front end processor mode.Physical terminal 201 links to each other with multiplexer 202, the multiplexer 202 of professional site links to each other with multiplexer 203 through network, multiplexer 203 is linked on the service front-end processor 205 by multi-serial-port card 204 again, and service front-end processor links to each other with professional main frame 206 through network again.This connected mode right and wrong IP's, can not satisfy the requirement that the network in fields such as bank, postal service develops and transforms to the IPization direction.Simultaneously, be subjected to the restriction of multi-serial-port card upper port quantity, realize linking to each other at a distance, can't on a front end processor, insert more physical terminal simultaneously though connect to make between physical terminal and the service front-end processor through multiplexer.
For above-mentioned two kinds of connected modes, all used multi-serial-port card, system is the fixing terminal device name of each port assignment on the multi-serial-port card.Be connected to through multi-serial-port card like this and all certainly use same terminal device name when physical terminal on the service front-end processor lands at every turn, guaranteed the security of system.But insert a large amount of terminals from network login simultaneously on same service front-end processor, multi-serial-port card then can not satisfy this demand.
Figure 3 shows that physical terminal passes through the mode that telnet (TELNET) mode inserts front end processor.The physical terminal 301 that possesses the TELNET client functionality links to each other with router three 02, link to each other with service front-end processor 304 through IP network and router three 03, service front-end processor links to each other with professional main frame 305 through network again, and perhaps, service front-end processor and professional main frame are same equipment.Like this, each physical terminal is connected on the service front-end processor by IP network equipment such as routers according to the TELNET agreement, the business application on the operation front end processor.Use this connected mode, can be implemented in and insert this function of a large amount of physical terminals on the front end processor simultaneously, but same physical terminal is when landing service front-end processor at every turn, its employed terminal device name is unfixed.That is to say that the front and back of each physical terminal are landed for twice, may use different terminal device names.This is absolutely unsafe to fields such as bank, finance or mail systems.In case traffic issues occurs, can't locate by which physical terminal and cause, be not easy to the orientation problem person liable.
Summary of the invention
In view of this, the method that the object of the present invention is to provide a kind of unix environment medium-long range terminal to insert.Log on physical terminal on the service front-end processor for each, so long as land from this terminal, it all is changeless then landing employed pseudo terminal device name at every turn, promptly realizes the terminal binding function.Simultaneously, this technology makes that allowing a large amount of long-range physical terminals on a service front-end processor lands and move business application on it.
For achieving the above object, technical scheme of the present invention is achieved in that
The method that a kind of unix environment medium-long range terminal inserts, physical terminal is linked to each other with first terminal access server, described first terminal access server links to each other with second terminal access server by network, described second terminal access server links to each other with service front-end processor, and this method may further comprise the steps:
A, set up the fixed correspondence of the pseudo terminal device name on described physical terminal and the described service front-end processor in the service front-end processor of unix system, pseudo terminal device comprises pseudo-terminal main equipment and pseudo-terminal slave unit;
B, interpolation make unix system open the list item of pseudo-terminal slave unit, are used for unix system operation back and open the pseudo-terminal slave unit automatically according to described list item;
The interface drive functional module that sets in advance on C, the startup service front-end processor is opened the pseudo-terminal main equipment;
Transmission control linkage request in D, the monitoring network, verify whether this connection is to be initiated by the physical terminal that has disposed corresponding relation in steps A, if then this physical terminal is linked on the service front-end processor, be mapped with corresponding pseudo-terminal main equipment, otherwise refuse this connection preferably, described first terminal access server and second terminal access server are the IP network equipment with routing forwarding data function.
Preferably, be to make the pseudo terminal device name on physical terminal and the service front-end processor set up fixing corresponding relation in the described steps A by writing configuration file.
Preferably, the described configuration file of steps A is edited by the arbitrary text edit tool, and comprise pseudo terminal device name, the IP address and the numbering of physical terminal on first terminal access server of first terminal access server, the IP address of described pseudo terminal device name, first terminal access server and the fixing one-to-one relationship of physical terminal numbering formation that physical terminal will use in each the bar list item in this configuration file at least.
Preferably, the described list item of the step B file directory that is added on the unix system service front-end processor is in the file of inittab for/etc/, file name.The described interface drive functional module of step C comprise the network data interface level of network data at least and make the pseudo-terminal slave unit and the pseudo-terminal main equipment between carry out the business datum interface layer of service interaction.Step D is described to be linked into this physical terminal on the service front-end processor, after corresponding pseudo-terminal main equipment is mapped, this method also comprises: receive the pending data that physical terminal is sent through network by network data interface level, and to its decapsulation, or the data after business application is handled are carried out sending on the network after the form encapsulation, finish the mutual of business datum between physical terminal and the business application; The data of sending by business datum interface level receiving network data interface level, and deletion control field data division wherein, obtaining pure business datum, or the pure business datum after will business application handling is added and is sent to business datum interface level after going up the control field data division.
Preferably, the described verification method of step D further may further comprise the steps:
The information of D1, the described configuration file of interface drive functional module read step A according to the described list item of step B, is opened the pairing pseudo-terminal main equipment of pseudo terminal device name, and creates and monitor socket, monitors the connection request on the network;
D2, judge whether connection request is arranged on the network, if execution in step D3, otherwise repeated execution of steps D2;
D3, accept connection request, preserve the descriptor of this connection request, and obtain the IP address of terminal access server, receive the pending data that this connection sends, search list item in the configuration file according to the numbering of physical terminal in these data, find corresponding pseudo terminal device name;
D4, establishment subprocess are realized data write exchange in network data and the business application by the pseudo-terminal master-slave equipment in subprocess, parent process is returned D2.
Preferably, the described subprocess of step D4 carries out data write exchange and further comprises:
D41, subprocess keep the descriptor and the corresponding pseudo-terminal main equipment descriptor of this connection;
D42, detect the state of this connection descriptor and pseudo-terminal main equipment descriptor;
D43, judge whether have data to arrive on the network, if execution in step D44, otherwise execution in step D45;
D44, read network data, and will write in the pseudo-terminal main equipment after the data decapsulation that read;
D45, judge whether business application has data to be written in the pseudo-terminal slave unit, if execution in step D46 is arranged, otherwise execution in step D42;
D46, from the corresponding pseudo-terminal main equipment of the pseudo-terminal slave unit of step D45 read the data that are written in the pseudo-terminal slave unit, to be written to after this data encapsulation in the network connection that connects the descriptor correspondence again, be sent to long-range physical terminal, return D42.
Use the present invention, as long as the configuration file content in the service front-end processor does not change, then during the service front-end processor of the each login system of each long-range physical terminal, all use same pseudo terminal device name certainly, and allow to insert a large amount of long-range physical terminals on a service front-end processor, the quantity that is accessed terminal only is subjected to the pseudo terminal device number that unix system can provide and the restriction of system performance.Therefore compared with prior art, the present invention has safe, good stability, and the location easily of breaking down, cost is low, uses plurality of advantages such as simple, convenient.
Description of drawings
Fig. 1 is the direct access service front end processor of the physical terminal of prior art application scheme one mode;
Fig. 2 is that the physical terminal of prior art application scheme two is through multiplexer access service front end processor mode;
Fig. 3 is that the physical terminal of prior art application scheme three is through telnet mode access service front end processor mode;
Fig. 4 is for using interface drive functional module processing flow chart of the present invention;
Fig. 5 is for using the subprocess processing flow chart of interface drive functional module of the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further details.
Networking mode of the present invention is identical with the networking mode of prior art application scheme three, just router is wherein replaced with terminal access server, and this terminal access server is the IP network equipment with routing forwarding data function.Can utilize existing resource to greatest extent like this.
In the kernel of UNIX operating system, the equipment that is specifically designed to terminal access is called pseudo terminal device, it can be divided into pseudo-terminal main equipment (ptypxx) and pseudo-terminal slave unit (ttypxx) again, the physical terminal that lands uses main equipment, and the physical terminal of operation business application uses slave unit.In the present embodiment, the pseudo-terminal main equipment is opened by the interface drive functional module, is used by the physical terminal of telnet, and the pseudo-terminal slave unit is opened by UNIX operating system, is used by business application.
In order to guarantee that each physical terminal is when landing service front-end processor, all must use same pseudo terminal device name at every turn, need and to set up fixing relation one to one between the long-range physical terminal of the access server that accesses terminal on the network and the pseudo terminal device name on the service front-end processor.Make physical terminal, under the control of interface drive functional module, finish service interaction process with business application by verifying and landing.
Describe concrete steps below in detail:
1) on service front-end processor, writes the configuration file that has editted, to set up physical terminal on the access server that accesses terminal on the network and the fixed correspondence between the pseudo terminal device name on the service front-end processor.This configuration file can be formed by arbitrary text edit tool editor, as file editor of unix system etc., and comprise the pseudo terminal device name that physical terminal will use, the IP address and the numbering of physical terminal on terminal access server of terminal access server in each the bar list item in this configuration file at least.Wherein, the pseudo terminal device name in the configuration file can be a pseudo-terminal slave unit name, also can be pseudo-terminal main equipment name.For example, the form of configuration file is as follows:
ttyp20 1.1.254.76 0
ttyp21 1.1.254.76 1
ttyp22 1.1.254.76 2
The first row ttypxx is the pseudo terminal device name of the physical terminal that defines on the service front-end processor, and secondary series (1.1.254.76) is the IP address of terminal access server, and the numeral of last row is physical terminal numberings on terminal access server.So just make between the physical terminal of the access server that accesses terminal and the pseudo terminal device name on the service front-end processor and set up fixing one-to-one relationship.
2) must open by unix system owing to the pseudo-terminal slave unit, therefore, in the front end processor unix system /add the list item below similar in the etc/inittab file, after being moved, system opens the pseudo-terminal slave unit that has disposed automatically, and ready for accepting landing of long-range physical terminal user.For example, it is as follows to add the list item open the pseudo-terminal slave unit:
p20:234:respawn:/etc/getty?ttyp20m
p21:234:respawn:/etc/getty?ttyp21m
p22:234:respawn:/etc/getty?ttyp22m
Wherein first row (p20) are the line identifiers of this row, and line identifier of each row must be inequality in/etc/inittab file.
3) start the interface drive functional module, make it to open the pseudo-terminal main equipment corresponding with the pseudo terminal device name that has disposed, when on the network connection request being arranged, verify whether this connection is to be initiated by the physical terminal that has disposed in the configuration file, if be proved to be successful, then this physical terminal is connected with corresponding pseudo-terminal main equipment, otherwise refusal connects.So just guaranteed that each physical terminal that lands from network all uses identical pseudo terminal device name to log on the service front-end processor at every turn.
For example, the interface drive functional module is opened the pseudo-terminal main equipment ptyp20 corresponding with the pseudo terminal device name that has disposed, ptyp21 and ptyp22, if the IP address is the terminal access server request connection of 1.1.254.76, then after the empirical tests success, this physical terminal is connected with corresponding pseudo-terminal main equipment.So just guaranteed that each physical terminal that lands from network all uses identical pseudo terminal device name to log on the service front-end processor at every turn.
Because the interface drive functional module has two interface levels, promptly the network data interface level of network data and make the pseudo-terminal slave unit and the pseudo-terminal main equipment between carry out the business datum interface level of service interaction.After long-range physical terminal successfully lands, the network data interface level of interface drive functional module receives the pending data message that physical terminal is sent by network, give business datum interface level with the data delivery after its decapsulation, business datum interface level is done further processing with the data of receiving, promptly delete the control field part in these data, obtain pure business datum, and should pure business datum write in the pseudo-terminal main equipment, and then send the pseudo-terminal slave unit to, by business application it is handled; Return the result data that result is given physical terminal for needs, after by business datum interface level this result data being sent to the pseudo-terminal main equipment from the pseudo-terminal slave unit, after the last control field part of this result data interpolation, send to network data interface level, by network data interface level these data are undertaken sending on the network after the form encapsulation by actual needs, thereby finish the service interaction process of long-range physical terminal and professional main frame.
Figure 4 shows that and use interface drive functional module processing flow chart of the present invention.
Step 408 is called fork () function, creates subprocess, realizes data write exchange in network data and the professional main frame by the pseudo-terminal master-slave equipment in subprocess, and parent process is returned step 404.So just guaranteed to log on each physical terminal on the service front-end processor, all used identical pseudo terminal device name at every turn from network.
Figure 5 shows that the subprocess processing flow chart of using interface drive functional module of the present invention.
Step 502 is called choice function select () and is detected the state that TCP connects descriptor client_fd and pseudo-terminal main equipment descriptor ptyp_fd, to prepare to handle the data on the network;
Step 504 reads the data on the network, and will write in the pseudo-terminal main equipment after the data decapsulation that read;
Step 505 judges whether business application has data to be written in the pseudo-terminal slave unit, if execution in step 506 is arranged, otherwise execution in step 502;
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the method that inserts of a unix environment medium-long range terminal, it is characterized in that, physical terminal is linked to each other with first terminal access server, and described first terminal access server links to each other with second terminal access server by network, and described second terminal access server links to each other with service front-end processor; This method may further comprise the steps:
A, the unix system in service front-end processor are set up the fixed correspondence of the pseudo terminal device name on described physical terminal and the described service front-end processor, and pseudo terminal device comprises pseudo-terminal main equipment and pseudo-terminal slave unit;
B, add the list item that the unix system make service front-end processor is opened the pseudo-terminal slave unit in the unix system of service front-end processor, the pseudo-terminal slave unit is opened automatically according to described list item in the unix system operation back that is used for service front-end processor;
The interface drive functional module that sets in advance on C, the startup service front-end processor is opened the pseudo-terminal main equipment;
D, service front-end processor are monitored the transmission control linkage request in the network, verify whether this connection is to be initiated by the physical terminal that has disposed corresponding relation in steps A, if then this physical terminal is linked on the service front-end processor, be mapped with corresponding pseudo-terminal main equipment, otherwise refuse this connection.
2. method according to claim 1 is characterized in that, described first terminal access server and second terminal access server are the IP network equipment with routing forwarding data function.
3. method according to claim 1 is characterized in that, in the described steps A is to make the pseudo terminal device name on physical terminal and the service front-end processor set up fixing corresponding relation by writing configuration file.
4. method according to claim 3, it is characterized in that, the described configuration file of steps A is edited by the arbitrary text edit tool, and comprise pseudo terminal device name, the IP address and the numbering of physical terminal on first terminal access server of first terminal access server, the IP address of described pseudo terminal device name, first terminal access server and the fixing one-to-one relationship of numbering formation that physical terminal will use in each the bar list item in this configuration file at least.
5. method according to claim 1 is characterized in that, the file directory that the described list item of step B is added on the unix system service front-end processor is in the file of inittab for/etc/, file name.
6. method according to claim 1, it is characterized in that, the described interface drive functional module of step C comprise the network data interface level of network data at least and make the pseudo-terminal slave unit and the pseudo-terminal main equipment between carry out the business datum interface level of service interaction.
7. method according to claim 6, it is characterized in that, step D is described to be linked into this physical terminal on the service front-end processor, after corresponding pseudo-terminal main equipment is mapped, this method also comprises: receive the pending data that physical terminal is sent through network by network data interface level, and to its decapsulation, or the data after business application is handled are carried out sending on the network after the form encapsulation, finish the mutual of business datum between physical terminal and the business application; The data of sending by business datum interface level receiving network data interface level, and deletion control field data division wherein, obtaining pure business datum, or the pure business datum after will business application handling is added and is sent to business datum interface level after going up the control field data division.
8. method according to claim 3, it is characterized in that, the described verification method of step D further may further comprise the steps: the information of D1, the described configuration file of interface drive functional module read step A, according to the described list item of step B, open the pairing pseudo-terminal main equipment of pseudo terminal device name, and create and monitor socket, monitor the connection request on the network; D2, judge whether connection request is arranged on the network, if execution in step D3, otherwise repeated execution of steps D2;
D3, accept connection request, preserve the descriptor of this connection request, and obtain the IP address of first terminal access server, receive the pending data that this connection sends, search list item in the configuration file according to the numbering of physical terminal in these data, find corresponding pseudo terminal device name;
D4, establishment subprocess are realized data write exchange in network data and the business application by the pseudo-terminal master-slave equipment in subprocess, parent process is returned D2.
9. method according to claim 8 is characterized in that, the described subprocess of step D4 carries out the data write exchange and further comprises:
D41, subprocess keep the descriptor and the corresponding pseudo-terminal main equipment descriptor of this connection;
D42, detect the state of this connection descriptor and pseudo-terminal main equipment descriptor;
D43, judge whether have data to arrive on the network, if execution in step D44, otherwise execution in step D45;
D44, read network data, and will write in the pseudo-terminal main equipment after the data decapsulation that read;
D45, judge whether business application has data to be written in the pseudo-terminal slave unit, if execution in step D46 is arranged, otherwise execution in step D42;
D46, from the corresponding pseudo-terminal main equipment of the pseudo-terminal slave unit of step D45 read the data that are written in the pseudo-terminal slave unit, to be written to after this data encapsulation in the network connection that connects the descriptor correspondence again, be sent to long-range physical terminal, return D42.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031092462A CN100395735C (en) | 2003-04-07 | 2003-04-07 | Method for accessing remote terminal in UNIX cenvironment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031092462A CN100395735C (en) | 2003-04-07 | 2003-04-07 | Method for accessing remote terminal in UNIX cenvironment |
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| CN1536499A CN1536499A (en) | 2004-10-13 |
| CN100395735C true CN100395735C (en) | 2008-06-18 |
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| CNB031092462A Expired - Fee Related CN100395735C (en) | 2003-04-07 | 2003-04-07 | Method for accessing remote terminal in UNIX cenvironment |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100342321C (en) * | 2005-06-14 | 2007-10-10 | 迈普（四川）通信技术有限公司 | Network printing system and method |
| CN100435511C (en) * | 2005-07-04 | 2008-11-19 | 中国工商银行股份有限公司 | Simulation system and method for client terminal, server and character terminals |
| CN101079903B (en) * | 2007-06-21 | 2011-01-19 | 中国工商银行股份有限公司 | Method and system based on remote login of user terminal |
| CN104348799B (en) * | 2013-07-31 | 2019-02-05 | 腾讯科技（深圳）有限公司 | A kind of filter method and device of network access request |
| CN104933161B (en) * | 2015-06-26 | 2018-03-09 | 飞天诚信科技股份有限公司 | A kind of method and device for obtaining the input data from input equipment |
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| US5588119A (en) * | 1993-08-23 | 1996-12-24 | Vincent; Ronald | Method for correlating logical device names with a hub port in a local area network |
| US5983004A (en) * | 1991-09-20 | 1999-11-09 | Shaw; Venson M. | Computer, memory, telephone, communications, and transportation system and methods |
| WO2001075628A1 (en) * | 2000-03-31 | 2001-10-11 | Dora-International | System and method for integrated referral and communication services |
| US20020087650A1 (en) * | 2000-12-29 | 2002-07-04 | Fagerburg Eric D. | Remotely controlling a UNIX-based system |
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| US5983004A (en) * | 1991-09-20 | 1999-11-09 | Shaw; Venson M. | Computer, memory, telephone, communications, and transportation system and methods |
| US5588119A (en) * | 1993-08-23 | 1996-12-24 | Vincent; Ronald | Method for correlating logical device names with a hub port in a local area network |
| JPH08180019A (en) * | 1994-12-27 | 1996-07-12 | Nec Corp | Work station emulator |
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| US20020087650A1 (en) * | 2000-12-29 | 2002-07-04 | Fagerburg Eric D. | Remotely controlling a UNIX-based system |
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