Method, system, and computer program product for creating a raw data channel form an integrating component to a series of kernel mode filters

• US 6,243,753 B1
• Filed: 06/12/1998
• Issued: 06/05/2001
• Est. Priority Date: 06/12/1998
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Machin, Richard C., Hyder, Jameel
• Primary Examiner(s): Harrell, Robert B.
• Assistant Examiner(s): VU, THONG H
• Application Number:
  US09/097,292
• Time in Patent Office: 1,089 Days
• Field of Search: 395/551, 707/8, 380/9, 364/572, 709/250, 709/321, 709/227
• US Class Current: 709/227
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

The present invention allows data to be accessible by kernel mode filters and other processing components while simultaneously allowing connection-oriented device drivers to be written in a simplified fashion in an integrating component environment. Furthermore, this is done without requiring proprietary mechanisms in the device driver itself in order to place the data stream into the kernel mode filter environment. This is done by providing a special raw data client transport that is written to the transport interface of an integrating component. Driver development is simplified by programming to the driver interface of the integrating component in a standardized fashion.

Claims

1. In a computer that includes one or more kernel mode filters operating in a kernel mode, an application operating in a user mode, and a connection-oriented device driver, a method for using the application to establish a data channel entirely in the kernel mode between the connection-oriented device driver and the kernel mode filters, enabling the kernel mode filters to access connection-oriented data, the method comprising the acts of:

establishing a connection between the application operating in the user mode and the connection-oriented device driver, wherein the connection-oriented device driver controls connection-oriented hardware that interfaces with a network;

after establishing the connection, said application causing a data channel associated with the connection to be established entirely in the kernel mode between the connection-oriented device driver and a raw data transport that operates in the kernel mode and is associated with the kernel mode filters; and

receiving, at the raw data transport, connection-oriented data that has been redirected from said connection to said data channel and transmitting the data to said one or more kernel mode filters, such that said one or more kernel mode filters receive the connection-oriented data from the network without the data passing into the user mode.

2. A method as recited in claim 1, further comprising the act of controlling the connection-oriented device driver using an integrating component at the computer, the integrating component having:

a first abstracted interface for communicating with the raw data transport;

a second abstracted interface for communicating with the connection-oriented device driver; and

a connection interface for communicating with the application.

3. A method as recited in claim 2, wherein the act of establishing the connection comprises the act of associating the application with the connection interface and associating the connection-oriented device driver with the second abstracted interface.

4. A method as recited in claim 2, wherein the act of causing the data channel to be established comprises the acts of:

receiving and storing, by the raw data transport, a connection identifier associated with the connection indicating that the connection is established;

receiving at the raw data transport an instruction for establishing the data channel, the instruction including an instance of the connection identifier; and

establishing the data channel and, based on a determination that the instance of the connection identifier matches the connection identifier stored by the raw data transport, associating the data channel with the connection.

5. A method as recited in claim 1, wherein the act of receiving connection-oriented data is conducted such that, from the standpoint of the connection-oriented device driver, the connection-oriented data is transmitted as if it were being received by the application.

6. A method as recited in claim 1, further comprising the act of transmitting data from the kernel mode filters to the device driver using the data channel.

7. A method as recited in claim 1, wherein the act of causing the data channel to be established is conducted such that, from the perspective of the kernel mode filters, the connection-oriented device driver appears as a data source and a data sink.

8. In a computer that includes one or more kernel mode filters operating in a kernel mode, an application operating in a user mode, and a connection-oriented device driver, a method for using the application to establish a data channel entirely in the kernel mode between the connection-oriented device driver and the kernel mode filters, enabling the kernel mode filters to access connection-oriented data, the method comprising the acts of:

providing an integrating component at the computer, the integrating component having;

a first abstracted interface for communicating with a raw data transport that operates in the kernel mode and is associated with the kernel mode filters;

a second abstracted interface for communicating with the connection-oriented device driver, wherein the connection-oriented device driver controls connection-oriented hardware that interfaces with a network; and

a connection interface for communicating with the application;

establishing a connection between the application and the connection-oriented device driver;

after establishing the connection, said application causing a data channel associated with the connection to be established entirely in the kernel mode between the connection-oriented device driver and the raw data transport; and

redirecting connection-oriented data from said connection to said data channel and transmitting the data to said one or more kernel mode filters, wherein the data is transmitted in the data channel from the connection-oriented device driver to the integrating component as if, from the perspective of the connection-oriented device driver, the data were being transmitted to the application.

9. A method as recited in claim 8, wherein the act of establishing the connection is conducted by the application operating in user mode initiating the establishment of the connection via the connection interface.

10. A method as recited in claim 9, wherein the act of causing the data channel to be established further comprises the act of the application communicating with the raw data transport after the establishment of the connection to initiate the establishment of the data channel.

11. A method as recited in claim 8, wherein the connection-oriented data comprises multimedia streaming data and the kernel mode filters comprise filters for processing multimedia streaming data.

12. A method as recited in claim 8, wherein the act of establishing the connection comprises the act of associating the application with the connection interface and associating the connection-oriented device driver with the second abstracted interface.

13. A method as recited in claim 8, wherein the act of causing the data channel to be established comprises the acts of:

receiving and storing, by the raw data transport, a connection identifier associated with the connection indicating that the connection is established;

receiving at the raw data transport an instruction for establishing the data channel, the instruction including an instance of the connection identifier; and

establishing the data channel and, based on a determination that the instance of the connection identifier matches the connection identifier stored by the raw data transport, associating the data channel with the connection.

14. A computer program product for implementing, in a computer that includes one or more kernel mode filters operating in a kernel mode, an application operating in a user mode, and a connection-oriented device driver, a method for using the application to establish a data channel entirely in the kernel mode between the connection-oriented device driver and the kernel mode filters, enabling the kernel mode filters to access connection-oriented data, the computer program product comprising:

a computer-readable medium carrying computer-executable instructions for implementing the method, the computer-executable instructions including program code means for;

establishing a connection between the application operating in the user mode and the connection-oriented device driver, wherein the connection-oriented device driver controls connection-oriented hardware that interfaces with a network;

after establishing the connection, said application causing a data channel associated with the connection to be established entirely in the kernel mode between the connection-oriented device driver and a raw data transport that operates in the kernel mode and is associated with the kernel mode filters; and

receiving, at the raw data transport, connection-oriented data that has been redirected from said connection to said data channel and transmitting the data to said one or more kernel mode filters, such that said one or more kernel mode filters receive the connection-oriented data from the network without the data passing into the user mode.

15. A computer program product as recited in claim 14, wherein the computer-executable instructions further comprise instructions for providing an integrating component at the computer, the integrating component having:

a first abstracted interface for communicating with the raw data transport;

a second abstracted interface for communicating with the connection-oriented device driver; and

a connection interface for communicating with the application.

16. A computer program product as recited in claim 15, wherein establishing the connection is conducted in response to the application operating in user mode initiating the establishment of the connection via the connection interface.

17. A computer program product as recited in claim 15, wherein the program code means for establishing the connection comprise program code means for associating the application with the connection interface and for associating the connection-oriented device driver with the second abstracted interface.

18. A computer program product as recited in claim 15, wherein the program code means for causing the data channel to be established comprise program code means for:

receiving and storing, by the raw data transport, a connection identifier associated with the connection indicating that the connection is established;

receiving at the raw data transport an instruction for establishing the data channel, the instruction including an instance of the connection identifier; and

establishing the data channel and, based on a determination that the instance of the connection identifier matches the connection identifier stored by the raw data transport, associating the data channel with the connection.

19. A computer program product as recited in claim 14, wherein the connection-oriented data comprises multimedia streaming data and the kernel mode filters comprise filters for processing multimedia streaming data.

20. In a computer having an operating system that has a kernel mode of operation and a user mode of operation, a method for creating a data channel entirely in the kernel mode from connection-oriented hardware to kernel mode filters, the method comprising:

providing an integrating component at the computer for controlling a connection-oriented device driver, the integrating component having;

an abstracted interface for transport protocol drivers;

an abstracted interface for connection-oriented device drivers; and

a connection interface for communicating with an application operating in user mode at the computer;

registering a raw data transport component that operates in the kernel mode with the integrating component over the abstracted interface for transport protocol drivers;

making a connection between the application and a connection-oriented device driver by associating the application with the connection interface and associating the connection-oriented device driver with the abstracted interface for connection-oriented device drivers;

receiving and storing, by the raw data transport component, a connection identifier associated with the connection;

again receiving the connection identifier at the raw data transport component and determining that the connection identifier has been stored by the raw data transport component; and

based on said determination;

establishing a data channel entirely in kernel mode between the raw data transport component, the integrating component, and the connection-oriented device driver; and

receiving at the raw data transport component data that has been redirected from said connection to said data channel and transmitting the data to other kernel mode filters.

21. A method as recited in claim 20, wherein receiving and storing the connection identifier is conducted by the raw data transport component receiving the connection identifier from the integrating component through the an abstracted interface for transport protocol drivers.

22. A method as recited in claim 21, wherein the connection identifier is stored in a global connection identifier table in which a plurality of connection identifiers associated with different connections can be stored.

23. A method as recited in claim 21, wherein again receiving the connection identifier at the raw data transport component and determining that the connection identifier has, been stored by the raw data transport component is conducted by the raw data transport component receiving the connection identifier from the application through a user mode interface of the raw, data transport component.