Network interface sharing methods and apparatuses that support kernel mode data traffic and user mode data traffic

• US 20060053275A1
• Filed: 10/28/2005
• Published: 03/09/2006
• Est. Priority Date: 10/30/2001
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Davis, Glenn, Morris, Larry, Tjong, Soemin
• Granted Patent: US 7,174,450 B2
• Time in Patent Office: Days
• US Class Current: 713/1
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/34 involving the movement of software or configuration parameters network booting or remote initial program loading [RIPL] G06F9/4416
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

Methods and apparatuses are provided that allow kernel mode data traffic and user mode data traffic to share a common network communication port. One apparatus includes user mode logic, kernel mode logic, and kernel mode to user mode interface logic. The interface logic is configured to receive data packets and selectively distribute the data packet to either the user mode or kernel mode logic. The interface logic includes “virtual” bridge logic and “virtual” miniport logic. The bridge logic determines if a received data packet is a user mode or kernel mode data packet. If it is a kernel mode data packet, then the bridge logic provides the data packet to the kernel mode logic. If it is a user mode data packet, then the bridge logic stores the data packet in memory for subsequent use by the user mode logic. The bridge logic also receives outgoing kernel mode data packets from the kernel mode logic and provides them to a network communication port, and retrieves outgoing user mode data packets from memory and provides them to the same network communication port. The miniport logic provides an interface between the memory accessed by the bridge logic and user mode logic. The miniport logic accepts outgoing user mode data packets and stores them in the memory for subsequent access by the bridge logic, and retrieves incoming user mode data packets stored in memory by the bridge logic.

Claims

1. An apparatus comprising:

a shared network communication port;

user mode logic;

kernel mode logic; and

kernel mode to user mode interface logic configured to receive at least one data packet over the shared communication port and selectively distribute said data packet to either said user mode logic or said kernel mode logic.

2. The apparatus as recited in claim 1, wherein said kernel mode to user mode interface logic further includes:

bridge logic configured to individually determine if said received data packet is a user mode data packet that is to be selectively distributed to said user mode logic or a kernel mode data packet to be selectively distributed to said kernel mode logic.

3. The apparatus as recited in claim 2, further comprising:

memory operatively coupled to said bridge logic, and wherein said bridge logic is further configured to store a plurality of user mode data packets in said memory.

4. The apparatus as recited in claim 3, wherein said bridge logic is configured to store said plurality of user mode data packets in said memory in a queued buffer configuration.

5. The apparatus as recited in claim 3, wherein said kernel mode to user mode interface logic further includes:

miniport logic operatively coupled to said bridge logic and said memory and configured to selectively retrieve at least one of said plurality of user mode data packets stored in said memory and provide said at least one retrieved data packet to said user mode logic.

6. The apparatus as recited in claim 3, where the shared network communication port is a physical network communication port operatively coupled to said bridge logic and configurable to receive both user mode data packets and kernel mode data packets from an external device.

7. The apparatus as recited in claim 1, wherein:

said user mode logic is further configured to generate at least one outgoing user mode data packet;

said kernel mode logic is further configured to generate at least one outgoing kernel mode data packet; and

said kernel mode to user mode interface logic is further configured to receive said outgoing user mode data packet from said user mode logic and said outgoing kernel mode data packet from said kernel mode logic.

8. The apparatus as recited in claim 5, wherein:

said bridge logic is configured to receive said outgoing kernel mode data packet from said kernel mode logic; and

said miniport logic is configured to receive said outgoing user mode data packet from said user mode logic and further configured to store a plurality of outgoing user mode data packets in said memory.

9. The apparatus as recited in claim 8, wherein said miniport logic is configured to store said plurality of plurality of outgoing user mode data packets in said memory in a queued buffer configuration.

10. The apparatus as recited in claim 8, wherein said bridge logic is further configured to selectively retrieve at least one of said plurality of outgoing user mode data packets stored in said memory.

11. The apparatus as recited in claim 2, further comprising:

at least one processing unit operatively configured to selectively run in kernel mode or user mode; and

wherein said bridge logic includes virtual bridge logic provided by said processing unit while running in said kernel mode.

12. The apparatus as recited in claim 5, further comprising:

at least one processing unit operatively configured to selectively run in kernel mode or user mode; and

wherein said miniport logic includes virtual miniport logic provided by said processing unit while running in said user mode.

13. The apparatus as recited in claim 2, wherein said kernel mode logic further includes:

kernel mode debugging logic coupled to said bridge logic.

14. The apparatus as recited in claim 5, wherein said user mode logic further includes:

network protocol logic operatively coupled to said miniport logic; and

application level logic operatively coupled to said network protocol logic.

15. The apparatus as recited in claim 6, wherein said physical network communication port is configurable to provide a network connection to a TCP/IP network.

16. The apparatus as recited in claim 6, wherein said physical network communication port is configurable to provide a network connection to the Internet.

17. The apparatus as recited in claim 6, wherein said apparatus is included within a device having only one said physical network communication port.

18. A method comprising:

providing at least one processing unit to selectively run user mode logic and kernel mode logic;

receiving at least one data packet through a shared network communication port; and

while said processing unit is running said kernel mode logic, selectively handling said data packet for use with either said user mode logic or said kernel mode logic.

19. The method as recited in claim 18, wherein selectively handling said data packet for use with either said user mode logic or said kernel mode logic further includes:

determining if said received data packet is a user mode data packet for use by said user mode logic or a kernel mode data packet for use by said kernel mode logic; and

storing received data packets determined to be user mode data packets in memory.

20. A computer readable media having computer instructions for performing acts comprising:

selectively running at least one processing unit using either user mode logic or kernel mode logic;

receiving at least one data packet through a shared network communication port; and

while running said kernel mode logic, selectively handling said data packet for use with either said user mode logic or said kernel mode logic.