JP2012194940A - Data processing device, program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel print system, even when a user performing a print instruction is different from a user receiving printed matters, allowing the user to surely receive the printed matters without troublesome labor.SOLUTION: The data processing device determines whether or not a destination user specified by job information data included in job data is logged in any client in a network; determines a remote printer linked with the destination user determined to log in, as a print destination printer; displays to the client linked with the destination user, a print dialog that addressably displays a printer name of the determined print destination printer, and draws an attention of the destination user.

Description

  The present invention relates to a data processing technique for print output, and more particularly, to a data processing device for outputting a print job to an output device associated with a designated destination user.

  Conventionally, when a user selects a virtual printer driver from an application and executes printing, there is known a printing system that automatically selects a printer as a printing destination based on setting file information in which rules for sorting are described. It has been. In this regard, Japanese Patent Application Laid-Open No. 2011-8582 (Patent Document 1) discloses a printing system that displays a printing destination determined for each job data with respect to a request source that has issued a printing instruction.

  However, the printing system of Patent Document 1 is based on the premise that the user who issues a print instruction and the user who receives the output printed matter are the same, and if the two are different, sufficient convenience cannot be exhibited. It was. For example, in a hospital where a pharmacy is installed at a location away from a medical office, if the prescription data held by the client PC in the medical office is to be received by a person at the pharmacy on a paper output basis, the printing system of Patent Document 1 still has Carry the prescription printed in the medical office to the pharmacy and hand it directly, or after giving a prescription printing instruction from the client PC in the medical office to the printer in the pharmacy, use the telephone etc. from the medical office to indicate that fact The only way was to contact

  However, the method of carrying the printed material directly and handing it is not efficient and there is a risk of loss while it is being carried. On the other hand, remote printing while keeping in touch with the other party is also troublesome. . The easiest method is to send a prescription electronic document from the medical office to the pharmacy by an attached mail and have the pharmacy print the electronic document. In this case, there is a risk of information leakage on the Internet. .

  The present invention has been made in view of the above-described problems in the prior art, and the present invention can be applied to a case where a user who issues a print instruction and a user who receives the printed matter are different from each other without taking troublesome work. It is an object of the present invention to provide a novel printing system that allows a partner to receive a printed matter.

  The present inventor has earnestly invented a novel printing system capable of reliably receiving the printed matter without any troublesome work even when the user who issues the print instruction and the user who receives the printed matter are different. As a result of examination, when a user other than yourself is specified as the destination, it is determined whether the destination user is logged in to a client on the network, and then a print dialog is displayed for the client to which the destination user is logged in. Thus, the present inventors have conceived of a configuration that draws attention and arrived at the present invention.

  That is, according to the present invention, a data processing apparatus is connected to a plurality of clients and a plurality of remote printers via a network and executes a print job based on job data received from an application execution unit. An apparatus includes a virtual printer driver that generates a work space for each job data and converts image data included in the job data into drawing data, and a dispatch processing unit that is generated as a private instance for each job data. The job information data included in the job data includes destination user designation information for designating a destination user, and the dispatch processing unit determines whether the destination user is logged in to any client in the network. A login determination unit for determining whether or not When the in-determination unit determines that the user is logged in, a shipping destination control unit that determines a remote printer associated with the destination user as a printing destination printer; and the shipping destination control unit that determines the printing destination printer There is provided a data processing apparatus including a UI display unit that generates a print dialog for displaying a printer name of a remote printer so that the printer name can be specified and displays the print dialog on a client associated with the destination user.

1 is a diagram illustrating a network print system according to an embodiment. FIG. 6 is a diagram showing a print property dialog in the present embodiment. The figure which shows the functional block diagram of the data processor of this embodiment. The figure which shows the dispatch management table in this embodiment. The figure which shows the matching table in this embodiment. The figure which shows the display destination management table in this embodiment. The figure which shows the flowchart of the process which the data processor of this embodiment performs. The figure which shows the print dialog in this embodiment.

  Hereinafter, although this invention is demonstrated with embodiment, this invention is not limited to embodiment mentioned later. In the drawings referred to below, the same reference numerals are used for common elements, and the description thereof is omitted as appropriate.

  FIG. 1 shows a network print system 100 including a data processing apparatus 110 according to an embodiment of the present invention. The network printing system 100 includes a data processing device 110, a plurality of clients 112 referred to as personal computers, and a plurality of remote printers 122. A network 130 is referred to as a LAN or VPN. Are connected to each other.

  In the network print system 100, at least one remote printer 122 is assigned to each client 112. In the example shown in FIG. 1, the client 112 and the remote printer 122 are in units of departments (sections A to C). Are associated.

  The data processing apparatus 110 according to the present embodiment is preferably implemented as a server apparatus, and includes a single-core, multi-core CPU, ROM, RAM that provides an execution space, a hard disk device, and the like, and includes a Windows (registered trademark) 200X server, a UNIX. The print destination of print data is controlled under the control of an OS such as (registered trademark), LINUX (registered trademark), or Solaris (registered trademark). Further, a transaction can be performed between the data processing apparatus 110 and the client 112 using an appropriate remote connection protocol such as RDP (Remote Desktop Protocol).

  In the client / server environment, each client 112 is implemented as a fat client that implements an application program and completes various processes. The client 112 can also be implemented as a thin client. In this case, the client 112 exclusively has a function of issuing a service request to the data processing apparatus 110 on which the application is installed, receiving a processing result, and issuing a processing result print request to the data processing apparatus 110. Implement.

  Upon receiving a print request and print data from the client 112, the data processing apparatus 110 according to the present embodiment determines a remote printer 122 to be a print destination, creates RAW data corresponding to the print data, A PDL (Page Description Language) command addition process is performed to generate output data and send it to the determined printing destination.

  Here, according to the network print system 100 of the present embodiment, a user who wants to print out a document from the remote printer 122 assigned to another user notifies the other user of the fact and then prints the document. Can be printed out. Such a printing method of the present embodiment is referred to as “destination notification mode” in the following description.

  According to this embodiment, the user can set a destination user via the print property dialog 20 illustrated in FIG. On the destination setting screen opened as one tab of the print property dialog 20, a radio button 22 for selecting a destination setting method and a text field 24 corresponding to the radio button 22 are displayed. In the present embodiment, two modes of “direct setting” and “automatic search” are prepared as destination setting methods. In the case of “direct setting”, an identifier for specifying the destination in the text field 24. The destination can be set by inputting (user name, etc.). On the other hand, in the case of “automatic search”, an appropriate destination corresponding to the contents of the document to be printed is automatically set. The basic configuration of the network print system 100 according to the present embodiment has been described above. Next, the data processing apparatus 110 according to the present embodiment will be described in more detail.

  FIG. 3 shows a functional block diagram of the data processing apparatus 110 of this embodiment. As shown in FIG. 3, the data processing device 110 includes a data processing unit 210 and an application execution unit 212. 3 illustrates the data processing device 110 in a thin client environment, and the data processing unit 210 and the application execution unit 212 are integrated to form the data processing device 110, but the client 112 is a fat client. 3 may be configured so that the client 112 has the function of the application execution unit 212 shown in FIG. 3. When a separate terminal server is provided in the network print system 100, the client 112 may be configured as shown in FIG. The left hand side functional unit 212 is implemented as a terminal server and the application execution unit 212 is implemented using the broken line shown in FIG. 5 as a network boundary, and the data processing apparatus 110 may be implemented as a printer server including only the data processing unit 210. .

  The application execution unit 212 includes an application 214 and a print request source notification unit 216. The application execution unit 212 receives processing requests and print requests from the client 112 via the network 130, and executes processing. The execution result is a print job (hereinafter simply referred to as a job) through an API call such as GDI (Graphical Device Interface) in response to the occurrence of a print command event by the application 214, and then the job data is subjected to data processing. Send to section 210.

  Upon receiving a print request from the client 112, the application 214 notifies the data processing unit 210 that a new job has started.

  The print request source notifying unit 216 receives information for specifying the print request source (hereinafter referred to as print request source information) from the client 112, and a UI display unit 248 described later included in the shipping processing unit 240 of the data processing unit 210. In response, the print request source information and the process ID are sent. Here, the print request source information includes a user ID used for login, a user authority, a session ID, and the like.

  The data processing unit 210 determines the printing destination according to the virtual printer driver 218, the job storage unit 226 for storing job data sent from the application 214 as a spool file, the image processing unit 236, and the print request source. And a dispatch processing unit 240 for sending data to be printed out to the remote drivers 250A to 250C corresponding to the printing destination.

  The virtual printer driver 218 includes a virtual print management unit 220, a job information data extraction unit 222, and a virtual drawing unit 224. When the virtual printer driver 218 receives job data from the application 214, the virtual printer driver 218 calls the virtual print management unit 220 and associates the job data with the process ID generated when the application 214 requests the virtual printer driver 218. Store in the job storage unit 226.

  The job data in this embodiment includes image data and job information data. The image data can be referred to as low-order image format data such as bitmap, JPEG, and GIF, and high-order image format data such as EMF including drawing codes, Postscript (registered trademark), PDF, and XPS. On the other hand, the job information data includes print request source identifiers (such as the user ID and IP address of the client 112 that is the print request source), imposition information of image data, margins, size settings, number of pages, and document information. In addition, destination notification mode setting information is included.

  The destination notification mode setting information in this embodiment includes the presence / absence of destination notification mode setting and destination user designation information. Here, the destination user designation information refers to information used for designating the destination user. The destination identifier (user ID) or automatic search request set via the print property dialog 20 shown in FIG. Content.

  On the other hand, the virtual print management unit 220 calls the virtual drawing unit 224 and the job information data extraction unit 222. The called virtual drawing unit 224 secures work spaces 230a to 230c and moves the image data 234 for each job to process the image data 234 included in the job data from the job storage unit 226 for each job. .

  On the other hand, the called job information data extraction unit 222 extracts job information data from the job data stored in the job storage unit 226 and stores it in the work space 230. The basic configuration of the virtual printer driver 218 and the work spaces 230a to 230c developed for each job have been described above. Next, the dispatch processing unit 240 will be described below.

  When the virtual printer driver 218 receives job data from the application execution unit 212, the virtual printer driver 218 generates private instances 240a to 240c as the dispatch processing unit 240 for the job. The private instances 240a to 240c include a shipping destination control unit 242, a data shipping unit 244, an association table 246, a UI display unit 248, and a login determination unit 249.

  The data sending unit 244 causes the image processing unit 236 implemented as an image processing module to acquire the image data 234 of the work space 230 corresponding to its own job, and is included in the job information data 232 in the work space 230. Based on the print information, processing such as page allocation and imposition is executed. Thereafter, the data sending unit 244 sends a print command for the image data 234 in the work space 230 to the remote drivers 250A to 250C corresponding to the printing destination remote printer 122 determined by the sending destination control unit 242 in the procedure described later. Issue.

  The data shipping unit 244 manages the shipping management table 300 illustrated in FIG. The shipping management table 300 includes a process ID generated when the application 214 requests the virtual printer driver 218 for a job, a printing destination printer ID determined by the shipping destination control unit 242 according to a procedure described later, and job information data 232. The print information included is registered in association with each other. The print information includes a user ID of the print request source, an IP address, print setting information, job information, and the like.

  Upon receiving the print command from the data sending unit 244, the output destination remote drivers 250A to 250C send the RAW format output data to the port monitor or the like, and print the output data to the determined output destination. Thereafter, the instance of the dispatch processing unit 240 generated for each job upon receiving a notification of printing completion from the output destination ends.

  As described above, in the data processing unit 210 of the present embodiment, the virtual printer driver 218 and the shipping processing unit 240 share the execution of processing in units of jobs, so that the work spaces 230a to 230c are virtual printers. As a storage area accessible from both the driver 218 and the dispatch processing unit 240, an independent spool space is configured for each job.

  Next, the “destination notification mode” of the present embodiment realized by the cooperation of the above-described shipping destination control unit 242 and the login determination unit 249 will be described.

  The shipping destination control unit 242 manages the association table 246 shown in FIG. The association table 246 includes a field 1002 for storing a user ID (such as a user name) of a user who has an account in the client 112, a field 1004 for storing a search keyword, a field 1006 for storing the MAC address of the client 112, and a client. The field 1008 stores a printer ID which is an identifier of a remote printer assigned to 112, and manages the values stored in each field in association with each other.

  In determining the remote printer 122 to be the printing destination, the shipping destination control unit 242 first determines whether or not the destination notification mode is set based on the destination notification mode setting information included in the job information data 232. As a result, when the destination notification mode is not set (that is, in the normal mode), the print request source identifier (the user ID of the client 112 that is the print request source) included in the job information data 232 is used as a key. With reference to the association table 246, the remote printer 122 having the printer ID associated with the print request source identifier is determined as the print destination.

  On the other hand, when the destination notification mode is set and the destination notification mode setting information includes the destination identifier (user ID), the shipping destination control unit 242 acquires the destination identifier (user ID). To do. When an automatic search request is included instead of the destination identifier (user ID), the shipping destination control unit 242 determines a search rule defined in advance (for example, ““ charge ”: in“ drawing data ”). All character strings included in the “keyword” field of the association table 246 (“section A AAA”, “section B XXX staff”, etc.) ) As a search key to perform a keyword search. As a result, the destination identifier (user ID) associated with the hit keyword is acquired.

  When the shipping destination control unit 242 acquires the destination identifier (user ID) by the above-described procedure, the user corresponding to the destination identifier (user ID) is notified to the login determination unit 249 by any client 112 in the network 130. Request to check if you are logged in.

  When the network print system 100 is in a thin client environment, the application execution unit 212 knows the login status of each user, so the login determination unit 249 inquires the application execution unit 212 to check the login status of the destination user. To do.

  On the other hand, when the network print system 100 is a client / server environment, the login determination unit 249 uses the MAC address stored in the association table 246 to perform the IP address of the client 112 of the destination user by RARP (Reverse Address Resolution Protocol). After acquiring the address, it is possible to acquire whether or not the destination user is logged in by transmitting a PING command to the IP address and confirming the response.

  The login determination unit 249 notifies the determination result to the shipping destination control unit 242. If the destination user is not logged in, the destination control unit 242 performs the same processing as in the normal mode described above, and determines the remote printer 122 associated with the print request source as the print destination. On the other hand, when the destination user is logged in, the shipping destination control unit 242 refers to the association table 246 again using the user ID of the destination user as a key, and determines the printer ID associated with the destination user ID. The remote printer 122 is determined as a printing destination.

  If there are a plurality of printer IDs associated with the destination user ID, all the printer IDs may be used as print destination candidates and may be left to the user for selection. The remote printer 122 having the IP address that seems to be closest in position may be automatically determined as the print destination by comparing the IP address with the IP addresses of a plurality of remote printers 122 that are print destination candidates.

  The shipping destination control unit 242 notifies the data shipping unit 244 of the printer ID of the printing destination determined in the above-described procedure, and the process ID and job information data 232. The data shipping unit 244 collects and manages the information notified from the shipping destination control unit 242 in the shipping management table 300 illustrated in FIG.

  Further, the shipping destination control unit 242 notifies the UI display unit 248 of the process ID and the determined printer ID of the print destination, and the print request source client 112 (hereinafter, print dialog). To display).

  Here, when the UI display unit 248 receives the print request source information and the process ID from the print request source notification unit 216 of the application execution unit 212, the UI display unit 248 registers the print request source information and the process ID in the display destination management table. . FIG. 6 illustrates the display destination management table 400. The display destination management table 400 manages process IDs and print request source information (login user ID, user authority, session ID) in association with each other. The UI display unit 248 transmits the print dialog display command with the same access authority as that of the print request source to the session specified by the session ID. In this case, the attached access authority is changed to the user authority of the client 112 before sending the print dialog display command.

  When the UI display unit 248 receives a print dialog display command from the shipping destination control unit 242, the UI display unit 248 refers to the shipping management table 300 managed by the data shipping unit 244 using the notified process ID as a key, and print request source user The ID and various print information are acquired, and a print dialog in which the name of the remote printer 122 to be printed and various print information is described is displayed on the client 112 associated with the process ID. The user of the client 112 that is the print request source issues a print instruction via the print dialog displayed in this way.

  The UI display unit 248 displays a print dialog on the client 112 and then waits for an instruction from the client 112. When the UI display unit 248 receives a print determination instruction from the client 112, the data sending unit 244 acquires the image format data generated in the work spaces 230a to 230c, and the remote printer 122 determined as the print destination. The data is output to the remote driver 250 corresponding to. On the other hand, when the UI display unit 248 receives a print cancel instruction from the client 112, the data sending unit 244 deletes the output data received from the work spaces 230a to 230c and cancels the print processing.

  Hereinafter, processing executed by the data processing apparatus 110 according to the present embodiment will be described based on the flowchart shown in FIG. Here, please refer to FIG. 1 again.

  In FIG. 1, consider a case where a user A in section A prints a document to be handed over to a user in another section. User A logs in to the client 112 for which he / she has an account, and then requests the data processing apparatus 110 to print out the processing result of the application.

  The data processing apparatus 110 determines whether or not the destination notification mode is set based on the destination notification mode setting information included in the print request from the client 112 (step 501). Here, when the user A has not set the destination notification mode (No in step 501), “Printer A” assigned to the user A is determined as the printing destination, and the client 112a to which the user A is logged in (printing) A print dialog is displayed on the request issuer (step 508). FIG. 8A shows a print dialog 30 displayed on the client 112a. In the print dialog 30, “Printer A” is displayed as the print destination.

  Thereafter, the data processing apparatus 110 waits for a print instruction from the user A, and when receiving a print cancel instruction (step 505, print cancel), stops the print processing (step 509), and issues a print request issuer. Is displayed on the client 112a (step 510), and the process is terminated.

  On the other hand, when a print decision instruction is received (step 505, print decision), output data is transmitted to “Printer A” to execute print processing (step 506), and then a print completion notification is displayed on the client 112a. (Step 507), and the process ends. As described above, when the destination notification mode is not set, the user A must pass the document output by “Printer A” to another user with his / her hand.

  On the other hand, when the user A has set the destination notification mode (Yes in step 501), the data processing apparatus 110 has acquired the destination user ID based on the destination notification mode setting information included in the print request from the client 112. Later (step 502), it is determined whether the destination user is logged in to any of the clients 112 in the network. Here, when the destination is the user C of the section C, as shown in FIG. 1, the user C is not logged in to any client 112 in the network 130 (step 503, No). After the print dialog 30 shown in FIG. 8A is displayed on the client 112a that is the print request issuer (step 508), the same procedure as described above is executed, and the process is terminated. In this case as well, the user A must hand the document output by “Printer A” to the user C with his / her hand.

  On the other hand, when the destination is the user B of section B, as shown in FIG. 1, since the user B is logged in to the client 112b in the network 130 (step 503, Yes), the client 112b The print dialog 40 shown in FIG. 8B is displayed (step 504). In the print dialog 40, “Printer B1” closest to the client 112b to which the user B is logged in is displayed as a print destination, and the pull-down list is another remote printer 122 assigned to the client 112b. “Printer B2” is displayed as selectable.

  Thereafter, the data processing apparatus 110 waits for a print instruction from the user B (step 505). When the print processing instruction is received, the data processing apparatus 110 stops the print process (step 509), and the client that is the print request issuing source. A print cancellation notice is displayed on 112a (step 510). As a result, the user A can know that the user B refuses to print. In this case, the user A can try the address notification mode printing addressed to the user B again, cancel the address notification mode on the print property screen, switch to normal printing, and output using his own “Printer A”. You can also.

  On the other hand, when receiving a print determination instruction from the user B, the data processing apparatus 110 transmits the output data to “Printer B1” installed in the B section and executes the print processing (step 506). The print completion notification is displayed on the client 112a that is the output request source (step 507).

  As described above, according to the present embodiment, the user A can deliver a desired document to the user B while in the section A, so that it is possible to save the trouble of delivering the printed document by one's own hand. And there is no risk of loss during transport. Further, according to the present embodiment, since a desired document can be delivered on a paper basis without depending on an electronic document, there is no need to worry that the electronic document leaks on the network. On the other hand, since the user B can know that there is a document addressed to him / her by the print dialog, he / she can forget to remove the document, and the user B automatically selects the remote printer 122 close to the user B. Since this is output, it can be received reliably.

  The above functions of the present embodiment can be realized by a device executable program described in an object-oriented programming language such as C, C ++, C #, Java (registered trademark), etc. It can be stored and distributed on a device-readable recording medium such as a CD-ROM, MO, DVD, flexible disk, EEPROM, EPROM, etc., and can be transmitted via a network in a format that other devices can.

  As described above, the present invention has been described with the embodiment. However, the present invention is not limited to the above-described embodiment, and as long as the operations and effects of the present invention are exhibited within the scope of embodiments that can be considered by those skilled in the art. It is included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 20 ... Print property dialog 22 ... Radio button 24 ... Text field 30, 40 ... Print dialog 100 ... Network print system 110 ... Data processing device 112 ... Client 122 ... Remote printer 130 ... Network 210 ... Data processing part 212 ... Application execution part 214 ... Application 216 ... Print request source notification unit 218 ... Virtual printer driver 220 ... Virtual print management unit 222 ... Job information data extraction unit 224 ... Virtual drawing unit 226 ... Job storage unit 230 ... Work space 232 ... Job information data 234 ... Image data 236 ... Image processing unit 240 ... Shipment processing unit 240 ... Private instance 242 ... Shipment destination control unit 244 ... Data dispatch unit 246 ... Correlation table 248 ... U The display unit 249 ... please sign determination section 250 ... remote driver 300 ... shipping management table 400 ... display destination management table 1002-1008 ... field

JP 2011-8582 A

Claims (11)

A data processing apparatus connected to a plurality of clients and a plurality of remote printers via a network and executing a print job based on job data received from an application execution unit, the data processing apparatus comprising:
A virtual printer driver that generates a work space for each job data and converts the image data included in the job data into drawing data;
Including a dispatch processing unit generated as a private instance for each job data;
The job information data included in the job data includes destination user designation information for designating a destination user,
The shipping processing unit
A login determination unit that determines whether or not the destination user is logged in to any client in the network;
A shipping destination control unit that determines a remote printer associated with the destination user as a printing destination printer when the login determining unit determines that the user is logged in;
A UI display unit that generates a print dialog for displaying the printer name of the remote printer determined by the shipping destination control unit as a print destination printer, and displays the print dialog on a client associated with the destination user;
including,
Data processing device. The shipping destination control unit determines a plurality of remote printers associated with the destination user as printing destination candidates,
The data processing apparatus according to claim 1, wherein the UI display unit generates a print dialog that displays the names of a plurality of remote printers that are candidates for the print destination in a selectable manner.   When there are a plurality of remote printers associated with the destination user, the shipping destination control unit selects a remote printer that is closest to the client associated with the destination user from among the plurality of remote printers. The data processing apparatus according to claim 1, wherein the data processing apparatus is determined as a printing destination printer. The dispatch processing unit manages a table in which a user ID of a user who has a client account, a MAC address of the client, and an identifier of a remote printer assigned to the client are linked,
The shipping address control unit
Determining a remote printer associated with the destination user as a print destination printer by referring to the table;
The data processing apparatus as described in any one of Claims 1-3. The login determination unit
By referring to the table and obtaining the IP address of the client of the destination user using the MAC address associated with the destination user, the destination user sends the PING command to the IP address, so that the destination user Determine if you are logged in,
The data processing apparatus as described in any one of Claims 1-4. For a data processing apparatus connected to a plurality of clients and a plurality of remote printers via a network and executing a print job based on job data received from an application execution unit.
A virtual printer driver that generates a work space for each job data and converts the image data included in the job data into drawing data;
Functional means generated as a private instance for each job data,
Login determination means for determining whether the destination user specified by the destination user designation information included in the job information data included in the job data is logged in to any client in the network;
A shipping destination control means for determining, as the printing destination printer, a remote printer associated with the destination user when the login determining unit determines that the user is logged in;
UI display means for generating a print dialog for displaying the printer name of the remote printer determined as the print destination printer by the shipping destination control means and displaying it on the client associated with the destination user;
A computer-executable program for realizing functional means including: The shipping destination control means determines a plurality of remote printers associated with the destination user as printing destination candidates,
The program according to claim 6, wherein the UI display unit generates a print dialog that displays the names of a plurality of remote printers that are candidates for the print destination so that the printer names can be designated.   When there are a plurality of remote printers associated with the destination user, the shipping destination control means selects a remote printer closest to the client associated with the destination user from among the plurality of remote printers. The program according to claim 6, wherein the program is determined as a printing destination printer. The dispatch processing means manages a table in which a user ID of a user having a client account, a MAC address of the client, and an identifier of a remote printer assigned to the client are linked,
The shipping destination control means includes:
Determining a remote printer associated with the destination user as a print destination printer by referring to the table;
The program as described in any one of Claims 6-8. The login determination means includes
By referring to the table and obtaining the IP address of the client of the destination user using the MAC address associated with the destination user, the destination user sends the PING command to the IP address, so that the destination user Determine if you are logged in,
The program as described in any one of Claims 6-9.   The computer-readable recording medium which recorded the program as described in any one of Claims 6-10.