System having a library of protocol independent reentrant network interface functions for providing common calling interface for communication and application protocols

• US 5,987,517 A
• Filed: 03/27/1996
• Issued: 11/16/1999
• Est. Priority Date: 03/27/1996
• Status: Expired due to Term

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Treadwell, David, Firth, Richard Louis
• Primary Examiner(s): Meky, Moustafa M.
• Application Number:
  US08/622,830
• Time in Patent Office: 1,329 Days
• Field of Search: 395/200.57, 395/200.58, 395/200.59, 395/200.47, 395/200.48, 395/200.49, 709/200, 709/203, 709/217, 709/218, 709/219, 709/220, 709/221, 709/228, 709/230, 709/231, 709/232
• US Class Current: 709/230
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• 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 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A library of reentrant networking functions organized with file system semantics is provided to allow a client application on a client computer connected to a computer network to establish communications with and exchange information with a server application on a server network computer. The library of reentrant networking functions are organized with file system semantics and parallel the function, structure and organization of a file system. Individual reentrant networking functions provide multiple networking features. The reentrant networking functions also provide asynchronous operations and security features. The library of reentrant networking functions can be included in, and called from multiple client applications. This library of reentrant networking function simplifies the creation of client applications such as network browsers that communicate with the Internet or an intranet computer network.

Claims

1. A computer readable medium having stored therein a library of protocol-independent reentrant network interface functions providing a common calling interface for networking application protocols including at least one application protocol selected from the group consisting of HTTP, FTP, SMTP, and Gopher, such functions callable simultaneously by client applications on a client computer, and such functions using one or more network connections based upon a network communication protocol from the group of network communication protocols consisting of TCP/IP, UDP/IP, NetBIOS, NetBUEI, IPX/SPX, DECnet, and OSI/TP-4, the client computer networked with a server network computer with a server application, the computer readable medium comprising:

a protocol-independent reentrant networking function, having an address input for receiving a destination address, for establishing an application connection that utilizes an application protocol from said group of application protocols between a selected client application on the client computer and the server application on the server network computer, the destination address identifying one of said group of application protocols for exchanging data with the server application;

a protocol-independent reentrant networking function for exchanging information, according to the identified application protocol, between the selected client application on the client computer and the server application on the server network computer;

wherein at least one of the reentrant networking functions imposes file system semantics on application protocols not otherwise organized according to file system semantics, at least one such reentrant function utilizes an application protocol from said group of application protocols, and at least one reentrant function using a network connection based upon a network communication protocol from said group of network communication protocols.

2. The computer readable medium of claim 1 further comprising a reentrant networking function for establishing a network connection to the Internet.

3. The computer readable medium of claim 1, the client computer executing thereon an operating system having at least one file system semantic, and an inspection interface for reviewing data formatted according to the at least one file system semantic, where all the reentrant networking functions are organized according to the at least one file system semantic, so that data from such networking functions can be displayed with the inspection interface.

4. The computer readable medium of claim 1 further comprising a reentrant networking function for establishing a network connection to an intranet.

5. The computer readable medium of claim 1, wherein the plurality of network communication protocols includes an Internet protocol, and wherein the protocol-independent reentrant networking function for establishing the application connection includes a port address parameter for specifying the Internet protocol for a network connection between the selected client application and the server application.

6. The computer readable medium of claim 1, wherein the plurality of network communication protocols includes an intranet protocol, and wherein the protocol-independent reentrant networking function for establishing the application connection includes a port address parameter for specifying the intranet protocol for a network connection between the selected client application and server application.

7. The computer readable medium of claim 1 where the selected client application is an Internet browser.

8. The computer readable medium of claim 1 further comprising:

a protocol-dependent reentrant networking function for exchanging information according to the identified application protocol between the selected client application and the server application.

9. A method for providing network communication using the computer readable medium of claim 1, wherein the client computer has an operating system with a plurality of operating system threads, the method comprising:

furnishing an operating system thread for each call made to a reentrant network interface function by a client application; and

synchronizing the calls made to the reentrant network interface functions with each of the operating system threads furnished.

10. A method for providing network communication using the computer readable medium of claim 1, wherein the client computer has an operating system with a plurality of operating system threads, the method comprising:

selectively providing an asynchronous operating mode for one or more functions in the library of reentrant network interface functions;

selectively providing a call back function for each reentrant network interface function operating in the asynchronous mode;

providing a single operating system thread to service calls made to reentrant network interface functions operating in the asynchronous operating mode;

synchronizing the calls made to reentrant network interface functions operating in the asynchronous operating mode with the single operating system thread;

executing asynchronously a call to a reentrant network interface function selected to operate in the asynchronous mode; and

calling the call back function for each reentrant network interface function operating in the asynchronous mode when reentrant network interface function has completed execution.

11. A method for providing access to a server network computer using the library of reentrant network interface functions of claim 1, the method comprising:

allowing a client application to call a selected reentrant network interface function; and

executing the called reentrant network interface function.

12. The computer readable medium of claim 1 further comprising:

a reentrant networking function for authenticating a response from a server network computer; and

a reentrant networking function for providing secure data exchange between a client application and a server application, where the secure data exchange includes data encryption.

13. The computer readable medium of claim 12 wherein the data encryption includes RSA data encrpytion.

14. The computer readable medium of claim 12 wherein the secure data exchange includes secure socket layer data exchange.

15. The computer readable medium of claim 12 wherein the secure data exchange includes private communications technology data exchange.

16. A programming tool kit providing a library of reentrant network interface functions providing a common calling interface for networking application protocols including at least one application protocol selected from the group consisting of HTTP, FTP, SMTP, and Gopher, such functions generally available to, and callable simultaneously by, a plurality of client applications on a client computer, and such functions using one or more network connections based upon a network communication protocol from the group of network communication protocols consisting of TCP/IP, UDP/IP, NetBIOS, NetBUEI, IPX/SPX, DECnet, and OSI/TP-4, the client computer having access to a computer network including a server network computer with a server application, the computer readable medium comprising:

a reentrant networking function for providing a plurality of individual selectable application protocols to connect a selected client application to a server application;

a protocol-independent reentrant networking function for establishing an application protocol session between the selected client application and the server application with a selected one of the application protocols;

a protocol-independent reentrant networking function for providing a common interface for sending requests, according to the selected application protocol, between the selected client application and the server application; and

a protocol-independent reentrant networking function for receiving at the selected client application protocol-dependent responses to the requests sent to the server application according to a selected application protocol;

wherein the networking functions for sending requests and receiving responses thereto are organized with file system semantics, such semantics being imposed on at least one selectable application protocols not so organized, at least one such reentrant function utilizes an application protocol from said group of application protocols, and at least one reentrant function utilizes a network connection based upon a network communication protocol from said group of network communication protocols.

17. The programming tool kit of claim 16,

wherein the reentrant networking function for providing a plurality of individual selectable application protocols also provides a plurality of individually selectable network communication protocols to connect the client computer to the server network computer.

18. The programming tool kit of claim 16 where the plurality of application protocols includes any of HTTP, FTP, SMTP, and Gopher.

19. The programming tool kit of claim 16, where the common interface for the reentrant networking function for sending requests provides for querying the server application, according to the selected application protocol, for information, reading data from the server application, and writing data to the server application.

20. The programming tool kit of claim 16, where a single reentrant networking function provides:

selectively setting one each of a plurality of network connection access options, such options including a direct connection to the computer network, a connection to the computer network through a predetermined application on the client computer, and a connection to the network through a network proxy application;

selectively setting one or more of the reentrant network functions to operate in a synchronous or asynchronous mode;

selectively setting, for one of the plurality of communication protocols, internal caching within the client computer for information returned to the client computer from the network server computer; and

initializing internal data structures used for connecting with the computer network.

21. A method for a single networking function to establish the application protocol session of claim 16, comprising:

establishing a connection to a server application;

selectively setting any of a plurality of application protocol session connection options including establishing HTTP, FTP, SMTP and Gopher application protocol sessions; and

selectively setting call back information for the selected client application operating in an asynchronous mode.

22. The programming tool kit of claim 16 wherein the protocol-independent reentrant networking function for establishing an application protocol session includes a port address parameter for specifying a network communication protocol for a network connection between the selected client application and the server application.

23. The programming tool kit of claim 16 further comprising:

a protocol-dependent reentrant networking function for exchanging information according to the selected application protocol between the selected client application and the server application.

24. The programming tool kit of claim 20 wherein the single reentrant networking function for selectively setting and initializing is the reentrant networking function for providing a plurality of individual selectable application protocols.

27. The method of claim 21, where establishing a connection to a server application includes:

selectively setting the name of the server application by specifying an alphanumeric name of the server application and an IP address of the server application;

selectively setting a server application port for connecting to;

selectively setting a name on the server network computer to login as; and

selectively setting a password for the selected name on the server network computer to login with.

25. A computer readable medium having stored therein a library of network interface functions generally available to, and callable simultaneously by, a plurality of client applications on a client computer, the client computer having access to a computer network including a server network computer with a server application, the computer readable medium comprising:

a protocol-independent networking function having a destination-address input, for establishing an application connection utilizing an application protocol selected from a group of application protocals between a selected client application on the client computer and the server application on the server network computer, the destination address identifying one of a plurality of application protocols selected from a group of application protocols for exchanging data with the server application; and

a protocol-independent networking function for exchanging information, according to the identified application protocol, between the selected client application on the client computer and the server application on the server network computer;

wherein each protocol-independent function provides a common calling interface that abstracts calling requirements for each of the plurality of application protocols into a common generic calling interface, and at least one reentrant function utilizes an application protocol selected from the group consisting of HTTP, FTP, SMTP, and Gopher, such functions using one or more network connections based upon a network communication protocol selected from the group of network communication protocols consisting of TCP/IP, UDP/IP, NetBIOS, NetBUEI, IPX/SPX, DECnet, and OSI/TP-4.

26. A computer readable medium having stored therein a library of reentrant network interface functions generally available to, and callable simultaneously by, a plurality of client applications on a client computer, the client computer having access to a computer network including a server network computer with a server application, the computer readable medium comprising:

a reentrant networking function for providing a plurality of individually selectable application protocols from a group consisting of HTTP, FTP, SMPT, and Gopher to connect a selected client application to a server application;

a protocol-independent reentrant networking function for establishing an application protocol session between the selected client application and the server application with a selected one of the application protocols;

a protocol-independent reentrant networking function for providing a common interface for sending requests, according to the selected application protocol, from the selected client application to the server application; and

a protocol-independent reentrant networking function for receiving at the selected client application protocol-dependent responses to the requests sent to the server application according to the selected application protocol;

wherein at least one of the reentrant networking functions is organized is organized with file system semantics, and at least one reentrant function utilizes an application protocol selected from the group consisting of HTTP, FTP, SMTP, and Gopher such functions using one or more network connections based upon a network communication protocol selected from the group of network communication protocols consisting of TCP/IP, UDP/IP, NetBIOS, NetBUEI, IPX/SPX, DECnet, and OSI/TP-4.

28. The computer readable medium of claim 26 wherein the library of reentrant network interface functions is hierarchically organized into one or more sets comprising:

a set of protocol-independent reentrant network interface functions;

a first set of protocol-dependent reentrant network interface functions, each of said first set of protocol-dependent reentrant network interface functions callable only after a call to a protocol-independent reentrant network interface function in the set of protocol-independent reentrant network interface functions; and

a second set of protocol-dependent reentrant network interface functions, each of said second set of protocol-dependent reentrant network interface functions callable only after a call to a protocol-dependent reentrant network interface function in the first set of protocol-dependent reentrant network interface functions.

29. A method of providing network communication between the client computer and the server network computer in accordance with the reentrant network interface functions of claim 28, the method comprising:

returning a protocol-independent function handle from each call to a protocol-independent reentrant network interface function;

requiring the returned protocol-independent function handle be used when making a call to a protocol-dependent reentrant network interface function from the first set of protocol-dependent reentrant network interface functions;

returning a first protocol-dependent function handle from each call to a protocol-dependent reentrant network interface function from the first set of protocol-dependent reentrant network interface functions; and

requiring the returned first protocol-dependent function handle to be used when making a call to a protocol-dependent reentrant network interface function from the second set of protocol-dependent reentrant network interface functions.

30. The method of claim 29 where the first protocol-dependent function handle inherits access to all internal data associated with the protocol-independent function handle.

31. The method of claim 29 where a second protocol-dependent function handle inherits access to all internal data associated with the protocol-independent function handle and first protocol-dependent function handle.

32. The method of claim 29 where the function handles are not useable in function calls which are not reentrant network interface function calls.