Method and system for enabling a file server to service multiple networks of the same network protocol family by invoking multiple instances of a network session protocol

• US 5,721,818 A
• Filed: 01/25/1996
• Issued: 02/24/1998
• Est. Priority Date: 01/25/1996
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Apple Computer Incorporated (Apple Inc.)
• Inventors: Vierling, Michael, Yanagihara, Kazuhisa, Hanif, Mohammad
• Primary Examiner(s): Lall, Parshotam S.
• Assistant Examiner(s): VU, VIET DUY
• Application Number:
  US08/591,860
• Time in Patent Office: 761 Days
• Field of Search: 395/200.02, 395/200.03, 395/200.09, 395/200.12, 395/831, 395/500, 395/680, 395/682, 395/702, 370/466, 370/469, 370/903
• US Class Current: 709/228
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A system and method for enabling a file server to service a plurality of physical networks, wherein each of the networks has a network protocol of the same type. The system and method comprises a single instance of a filing protocol, and an object-oriented class for implementing a session protocol. The system and method further comprises means for invoking a plurality of session protocol instances, where each one of the plurality of session protocol instances corresponds to one of the plurality of physical networks. Each one of the plurality of session protocol instances services the corresponding physical network and communicates with the single instance of the filing protocol, which enables the single instance of the filing protocol to service the plurality of physical networks.

Claims

1. A file server capable of servicing a plurality of physical networks of the same network protocol family, the file server comprising:

a single instance of a filing protocol; and

means for invoking a plurality of second protocol instances, each one of the plurality of second protocol instances corresponding to one of the plurality of physical networks, wherein each one of the plurality of second protocol instances services the corresponding physical network and communicates with a single instance of the fling protocol, which enables the single instance of the filing protocol to service the plurality of networks, wherein the second protocol is a session protocol.

2. A file server as in claim 1 wherein each one of the plurality of second protocol instances creates a corresponding protocol stack.

3. A file server as in claim 2 wherein the session protocol is an object-oriented class structure.

4. A file server as in claim 3 wherein the file server further includes a plurality of network interface cards to connect to the plurality of physical networks.

5. A file server as in claim 4 wherein the network protocol comprises an AppleTalk protocol.

6. A file server as in claim 5 wherein the filing protocol comprises AppleTalk filing protocol (AFP).

7. A file server as in claim 6 wherein the session protocol comprises AppleTalk session protocol (ASP).

8. A method for enabling a file server to service a plurality of physical networks of the same network protocol family, the method comprising the steps of:

(a) invoking a single instance of a filing protocol;

(b) invoking multiple session protocol instances corresponding to each one of the plurality of physical networks using an object-oriented class structure;

(c) servicing each one of the plurality of physical networks with the corresponding session protocol instance;

(d) communicating between each one of the plurality of physical networks and the single instance of the filing protocol through the multiple session protocol instances.

9. The method as in claim 8 wherein step (a) further includes the step of:

(a1) implementing the single instance of the filing protocol through a first object oriented class structure.

10. The method of claim 9 wherein step (b) further includes the step of:

(b1) implementing the multiple session protocol instances through a second object oriented class structure.

11. The method of claim 10 wherein step (b) further includes the step of:

(b2) calling a manager class structure to invoke the multiple instances of the session protocol.

12. The method of claim 11 wherein step (b) further includes the step of:

(b3) creating a separate protocol stack corresponding to the multiple session protocol instances.

13. The method of claim 12 wherein step (d) further includes the step of:

(d1) communicating between the single instance of the filing protocol and the multiple session protocol instances through a third object oriented class structure.

14. A computer-readable medium containing program instructions for enabling a file server to service a plurality of physical networks of the same network protocol family, the program instructions for:

(a) invoking a single instance of a filing protocol;

(b) invoking multiple session protocol instances corresponding to each one of the plurality of physical networks using an object-oriented class structure;

(c) servicing each one of the plurality of physical networks with the corresponding session protocol instance;

(d) communicating between each one of the plurality of physical networks and the single instance of the fling protocol through the multiple session protocol instances.

15. A computer-readable medium as in claim 14 wherein instruction (a) further includes an instruction for:

(a1) implementing the single instance of the filing protocol through a first object oriented class structure.

16. A computer-readable medium as in claim 15 wherein instruction (b) further includes an instruction for:

(b1) implementing the multiple session protocol instances through a second object oriented class structure.

17. A computer-readable medium as in claim 16 wherein instruction (b) further includes an instruction for:

(b2) calling a manager class structure to invoke the multiple instances of the session protocol.

18. A computer-readable medium as in claim 17 wherein instruction (b) further includes an instruction for:

(b3) creating a separate protocol stack corresponding to the multiple session protocol instances.

19. A computer-readable medium as in claim 18 wherein instruction (d) further includes an instruction for:

(d1) communicating between the single instance of the filing protocol and the multiple session protocol instances through a third object oriented class structure.