Method and apparatus for managing access to a networked peripheral

• US 5,647,056 A
• Filed: 11/18/1992
• Issued: 07/08/1997
• Est. Priority Date: 11/18/1992
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Information Systems Incorporated (Canon Inc.)
• Inventors: Kalwitz, George A., Russell, William C., Kraslavsky, Andrew J., Wadsworth, Robert D., Barrett, Lorraine F.
• Primary Examiner(s): DONAGHUE, LARRY D
• Application Number:
  US07/978,516
• Time in Patent Office: 1,693 Days
• Field of Search: 395/200, 395/275, 395/325, 395/114, 395/725, 395/800, 395/117, 395/115, 395/116, 395/650, 395/162, 395/110, 395/113, 370/85.2, 340/825.28, 379/412, 333/24 R
• US Class Current: 709/220
• CPC Class Codes: H04L 41/0853 by actively collecting configuration information or by backing up configuration information
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

Method and apparatus for interfacing a peripheral to a local area network with an interactive network board connected to the peripheral via a bi-directional peripheral interface and connectable to the local area network via a local area network interface. The interactive network board executes an access management program such as a socket server to monitor the local area network for communications from a network client directed to a proprietary socket. In response to communications detected by the access management program, the access management program establishes direct communication between the network client and itself and executes commands requested by the network client, such as commands to obtain or to alter the status of the network peripheral, or commands to obtain or to alter the status of the interactive network board itself. The interactive network board may also execute a peripheral server program such as a print server in a multitasking environment with the access management program.

Claims

1. A method for managing access to a peripheral over a local area network with an interactive network board connectable to the peripheral via a bi-directional peripheral interface and connectable to the local area network via a local area network interface, the method comprising the steps of:

executing an access management program, which includes a socket server program, on the interactive network board, said socket server program including process steps to monitor a proprietary socket number for network communication to the proprietary socket, as well as process steps to issue commands to change operational and configuration status of the peripheral and to issue requests for current operational and configuration status of the peripheral;

monitoring, with said socket server program, the proprietary socket number to detect network communications directed by a client to the proprietary socket;

establishing direct communication via the proprietary socket between the socket server and the client so as to receive network communications;

commanding, with said socket server program via the bi-directional interface and in response to first ones of received network communications, the peripheral to change its operational and configuration status;

commanding, with said socket server program via the bi-directional interface and in response to second ones of received network communications, the peripheral to transmit its current operational and configuration status;

monitoring, with said socket server program, the bi-directional peripheral interface to detect and store current operational and configuration status transmitted from the peripheral; and

outputting, with said socket server program, the current operational and configuration status transmitted from the peripheral onto the local area network in response to the second ones of the received network communications.

2. A method according to claim 1, wherein the peripheral comprises a printer, and further comprising the step of executing a print server program for receiving printer data from the local area network and for sending the printer data to the printer.

3. A method according to claim 2, further comprising the step of executing a non-preemptive monitor on the network board, the non-preemptive monitor multitasking the print server program and the socket server program.

4. A method according to claim 3, wherein said socket server program responds to requests for status of the print server program.

5. A method according to claim 4, wherein the status of the print program includes an identification of the type of print server program.

6. A method according to claim 2, further comprising the step of advertising, on the local area network, that services of the print server program and services of the socket server program are available, advertising of the print server program being interleaved with advertising of the socket server program.

7. A method according to claim 6, wherein, in said advertising step, services of the socket server are advertised on a first proprietary socket number, and further comprising the step of establishing direct communication with a client on a communication socket number.

8. A method according to claim 2, wherein said print server program and said socket server program are loaded out of a read only memory on the interactive network board into a random access memory on the interactive network board and executed from the random access memory.

9. A method according to claim 8, further comprising the step of downloading new server programs from the local area network into the random access memory.

10. A method according to claim 9, wherein said read only memory is comprised by an erasable read only memory, and further comprising the step of storing the downloaded server programs into said erasable programmable read only memory on the interactive network board.

11. A method according to claim 1, wherein said socket server program responds to requests on the local area network for status information of the interactive network board and transmits the status information of the interactive network board to the local area network.

12. A method according to claim 1, wherein said network communications include requests to alter the status of the interactive network board, and wherein said socket server program responds to such requests by altering a status of the interactive network board.

13. A method according to claim 12, wherein said socket server program periodically interrogates the peripheral for peripheral status information, the interrogation being performed in accordance with stored interrogation parameters, and further comprising the step of altering the status of the interrogation parameters.

14. A method according to claim 1, wherein the peripheral comprises a printer, and wherein the altered status includes status concerning a default printing configuration.

15. A method according to claim 1, wherein said peripheral comprises a printer, and wherein said altered status includes default fonts and print styles.

16. A method for interfacing a peripheral to a local area network using an interactive network board connectable to the peripheral via a peripheral interface and connectable to the local area network via a network interface, the method comprising the steps of:

executing a peripheral server program on the network board, the peripheral server program for servicing peripheral data between the peripheral and the local area network;

executing a socket server program on the network board, said socket server program including process steps to monitor a proprietary socket number for network communication requests issuable by at least two different clients on the local area network to the proprietary socket number, as well as process steps to issue commands to change operational and configuration status of the peripheral and to issue requests for current operational and configuration status of the peripheral via the peripheral interface in response to those network communication requests;

advertising on the local area network that services of the socket server are available;

receiving from one client of said at least two different clients a request for services of the socket server;

establishing direct communication via the proprietary socket between said one client and the socket server;

commanding, with said socket server program via the peripheral interface and in response to first ones of received network communication requests, the peripheral to change its operational and configuration status;

commanding, with said socket server program via the peripheral interface and in response to second ones of received network communications requests, the peripheral to transmit its current operational and configuration status;

monitoring, with said socket server program, the peripheral interface to detect and store current operational and configuration status transmitted from the peripheral; and

outputting, with said socket server program, the current operational and configuration status transmitted from the peripheral onto the local area network in response to the second ones of the received network communications.

17. A method according to claim 16, wherein the peripheral comprises a printer, and wherein the peripheral server program is comprised by a print server program which receives printer data from the local area network and sends the printer data to the printer.

18. A method according to claim 16, wherein said socket server program responds to requests on the local area network for status information of the interactive network board, and transmits the status information of the interactive board to the local area network.

19. A method according to claim 17, wherein the peripheral interface comprises a bi-directional interface.

20. A method according to claim 16, further comprising the step of executing a non-preemptive monitor on the network board, the non-preemptive monitor multitasking the peripheral server program and the socket server program.

21. A method according to claim 20, wherein said socket server program responds to requests for status of the peripheral server program.

22. A method according to claim 21, wherein the status of the peripheral program includes an identification of the type of peripheral server program.

23. A method according to claim 20, further comprising the step of advertising, on the local area network, that services of the peripheral server program are available, advertising of the peripheral server program being interleaved with advertising of the socket server program.

24. A method according to claim 16, wherein client requests include requests to alter the status of the interactive network board, and wherein said socket server program responds to such requests by altering a status of the interactive network board.

25. A method according to claim 24, wherein said socket server program periodically interrogates the peripheral for peripheral status information, the interrogation being performed in accordance with stored interrogation parameters, and further comprising the step of altering a status of the interrogation parameters.

26. A method according to claim 19, wherein the peripheral comprises a printer, and wherein the altered status includes status concerning a default printing configuration.

27. A method according to claim 19, wherein said peripheral comprises a printer, and wherein said altered status includes default fonts and print styles.

28. A method according to claim 16, wherein, in said advertising step, services of the socket server are advertised on a first proprietary socket number, and further comprising the step of establishing direct communication with the client on a second socket number.

29. A method according to claim 16, wherein said peripheral server program and said socket server program are loaded out of a read only memory on the interactive network board into a random access memory on the interactive network board and executed from the random access memory.

30. A method according to claim 29, further comprising the step of downloading new server programs from the local area network into the random access memory.

31. A method according to claim 30, wherein said read only memory is comprised by an erasable read only memory, and further comprising the step of storing the downloaded server programs into said erasable programmable read only memory on the interactive network board.

32. A local area network comprising:

a network bus;

a file server connectable to the network bus, said file server for storing a print queue from a plurality of work stations which direct print jobs to the queue;

an interactive network board connectable to the network bus, the interactive network board including a bi-directional peripheral interface, a processor for executing stored program process steps, and a memory for storing the program process steps;

a printer connectable to the bi-directional peripheral interface of said interactive network board;

a work station connectable to the network bus, said work station including a processor for executing stored program processing steps and a memory for storing the program processing steps, the processing steps including steps to request and to alter the operational and configuration status of the printer and steps to request and to alter the status of the interactive network boards,

wherein the memory of said interactive network board stores program process steps to monitor a proprietary socket number on the network bus for network communications directed to said proprietary socket;

to respond to requests from said work station for status of the interactive network board by transmitting the status of the interactive network board on the network bus;

to respond to requests from said work station to alter the status of the network board by altering the status of the interactive network board and transmitting a confirmation on the network bus;

to respond to requests from said work station for operational and configuration status of said printer by interrogating for printer operational and configuration status via the bi-directional peripheral interface, by receiving printer operational and configuration status via the bi-directional peripheral interface, and by transmitting operational and configuration printer status on the network bus; and

to respond to requests from said work station to alter the operational and configuration status of the printer by commanding said printer via the bi-directional peripheral interface to alter its operational and configuration status and by transmitting confirmation thereof onto said network bus.

33. A local area network according to claim 32, wherein the memory of said interactive network board includes program process steps to serve a printer peripheral by receiving printer data from the local area network and by sending the printer data to the printer.

34. A local area network according to claim 33, wherein the memory of the interactive network board includes program process steps to execute a non-preemptive monitor on the network board, the non-preemptive monitor for multi-tasking the print server program and the socket server program.

35. A local area network according to claim 34, wherein the memory of the interactive network board includes program process steps to advertise on the local area network that services of the print server program and services of the socket server program are available, advertising of the print server program being interleaved with advertising of the socket server program.

36. A local area network according to claim 35, wherein services of the socket server are advertised on a proprietary socket number, and direct communication is established on a communication socket number.

37. A local area network according to claim 32, wherein the memory of the interactive network board includes program process steps to interrogate the printer for printer status information, the interrogation being performed in accordance with stored interrogation parameters, and program process steps to alter the status of the interrogation parameters.

38. A local area network according to claim 32, further comprising a random access memory disposed on the interactive network board, wherein said memory on said interactive network board is comprised by a read only memory, and wherein said processor loads the process steps stored in said read only memory into said random access memory and executes the process steps from said random access memory.

39. A local area network according to claim 38, further comprising process steps to download new server programs from the local area network into random access memory.

40. A local area network according to claim 39, wherein said read only memory is comprised by an erasable read only memory and further comprising process steps to store the downloaded server programs into said erasable programmable read only memory on the interactive network board.