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

• US 20060036843A1
• Filed: 10/28/2005
• Published: 02/16/2006
• 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 7,228,410 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:

user mode logic;

kernel mode logic;

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

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.

2. A computer readable media comprising computer instructions that, when executed, provide:

user mode logic;

kernel mode logic;

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

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.

3. A method comprising in an apparatus having user mode logic, kernel mode logic, and kernel mode to user mode interface logic:

receiving, by kernel mode to user mode interface logic, at least one data packet over a shared communication port and selectively distributing said data packet to either said user mode logic or said kernel mode logic; and

individually determining, by bridge logic included in the kernel mode to user mode interface logic, 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,

wherein the apparatus further includes 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.