Abstract: A method and apparatus are provided for classifying received network frames (206) by extracting frame header data (e.g., n-tuple) which is combined with a key insert value (e.g., embedded prefix value “OP01, OP02, . . . OP0OP1”) to generate a lookup key (216), where the key insert value is generated by decoding a key composition rule (235) to extract a constant value (OP0) and a repeat value (OP1), and then replicating the constant value one or more times specified by the repeat value.

Abstract: Methods and systems are disclosed for non-intrusive debug processing of network frames. For certain embodiments, a frame parser processes frames from a network interface and generates frame metadata. A key generation engine processes each frame and its related metadata to generate a normal key and a debug key. The same key composition rule formats and key generation engine are used to generate the normal key and the debug key to provide non-intrusive debug processing. Frame classification logic compares the normal key to classification tables to determine a frame classification for the received frame. Separate debug comparison logic compares the debug key to debug reference data/masks to generate debug markers for the received frame. The frame classification and the debug markers for each frame are provided to frame marking logic, and a frame processing engine then processes the resulting marked/classified frames.

Abstract: Methods and systems are disclosed to embed valid-field (VF) bits into classification keys for network packet frames. The embedded VF bits allow for extracted data from existing fields associated with frame data to be distinguished from default data used for missing fields where this extracted data and default data has been included within a frame classification key generated for a network packet frame. In certain embodiments, a valid-field field extraction command (VF-FEC) causes a key generator to embed VF bits into a frame classification key, and the logic state of the VF bits are used to distinguish extracted data from default data. Further, the disclosed embodiments allow VF bits to be selectively cleared based upon a bit mask applied prior to embedding of the VF bits. Still further, users can define VF-FECs and other field extraction commands (FECs) for key generation through one or more programmable key composition rules.

Abstract: A method and apparatus are provided for classifying received network frames (106) by using a key composition rule (134) having a header portion (NF) and multiple variable length key extract commands in a coded order sequence to sequentially generate multiple data fields (FIELD 1-FIELD n) using operands contained in the key extract commands to generate a lookup key (116) by combining multiple data fields in the same coded order sequence as the key extract commands.

Abstract: Methods and systems are disclosed to embed valid-field (VF) bits into classification keys for network packet frames. The embedded VF bits allow for extracted data from existing fields associated with frame data to be distinguished from default data used for missing fields where this extracted data and default data has been included within a frame classification key generated for a network packet frame. In certain embodiments, a valid-field field extraction command (VF-FEC) causes a key generator to embed VF bits into a frame classification key, and the logic state of the VF bits are used to distinguish extracted data from default data. Further, the disclosed embodiments allow VF bits to be selectively cleared based upon a bit mask applied prior to embedding of the VF bits. Still further, users can define VF-FECs and other field extraction commands (FECs) for key generation through one or more programmable key composition rules.

Abstract: A method and apparatus are provided for classifying received network frames (234) by extracting frame header data (e.g., n-tuple) which is combined with a key insert value (e.g., embedded prefix value “OP01, OP02, . . . OP0OP1”) to generate a lookup key (217), where the key insert value is generated by decoding a key composition rule (212) to extract a constant value (OP0) and a repeat value (OP1), and then replicating the constant value one or more times specified by the repeat value.

Abstract: Methods and systems are disclosed for non-intrusive debug processing of network frames. For certain embodiments, a frame parser processes frames from a network interface and generates frame metadata. A key generation engine processes each frame and its related metadata to generate a normal key and a debug key. The same key composition rule formats and key generation engine are used to generate the normal key and the debug key to provide non-intrusive debug processing. Frame classification logic compares the normal key to classification tables to determine a frame classification for the received frame. Separate debug comparison logic compares the debug key to debug reference data/masks to generate debug markers for the received frame. The frame classification and the debug markers for each frame are provided to frame marking logic, and a frame processing engine then processes the resulting marked/classified frames.

Abstract: A system and method for receiving travel information such as flight information, directional guidance to airport gates and facilities, and interacting autonomously with service providers such as airlines and rental car companies without requiring human resources to receive the tickets or car keys. The system devices essentially provide an automatic chaperon which can initiate processes such as querying databases or provide navigation guidance without intervention, setup procedures or any prior knowledge on behalf of the user. It can also access secured databases for retrieving rental car reservation information for automatic rental car checkout, personal health files for emergency cases, flight check-in, connecting flight information and call for emergency staff alerting the staff automatically of the caller's location within the compound, as well as recent health history and condition.

Abstract: A device and method for interactively debugging a system controlled by a microprocessor. The device continuously monitors the signals passed along the system bus, watching for signals that match interactively defined break conditions and trace conditions. When a breakpoint condition is satisfied, the device causes the system's microprocessor to execute debug code, which either may mediate interactive control of the system by the user or may initiate the execution of a software patch. When a trace condition is satisfied, the device initiates tracing of bus activity. The device is controlled by the user using conventional interactive interface means such as a video terminal or a personal computer.