Computer system and network interface supporting class of service queues
First Claim
1. A method of managing packet transmission at an interface between a network medium and a host system, the method comprising:
- parsing an incoming packet comprising a data payload destined for an application running in the host system memory, wherein parsing an incoming packet includes determining and storing a classifier for the incoming packet;
generating one or more pointers to data fields in the incoming packet;
storing the incoming packet in a buffer memory;
using the one or more pointers to retrieve data associated with the data fields from the buffer memory;
applying one or more rules to the retrieved data to determine a priority for transferring the data payload associated with the retrieved data from the buffer memory to the host system memory, wherein the classifier indicates which of the one or more rules is applied to the retrieved data associated with the data fields of the incoming packet; and
using the one or more pointers to transfer the data payload associated with the retrieved data from the buffer memory to an application running in the host system memory according to the determined priority.
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Accused Products
Abstract
A data processing system adapted for high-speed network communications, a method for managing a network interface and a network interface for such system, are provided, in which processing of packets received over the network is achieved by embedded logic at the network interface level. Incoming packets on the network interface are parsed and classified as they are stored in a buffer memory. Functional logic coupled to the buffer memory on the network interface is enabled to access any data field within a packet in a single cycle, using pointers and packet classification information produced by the parsing and classifying step. Results of operations on the data fields in the packets are available before the packets are transferred out of the buffer memory. A data processing system, a method for management of a network interface and a network interface are also provided by the present invention that include an embedded firewall at the network interface level of the system, which protects against inside and outside attacks on the security of data processing system. Furthermore, a data processing system, a method for management of a network interface and a network interface are a provided by the present invention that support class of service management for packets incoming from the network, by applying priority rules at the network interface level of the system.
123 Citations
26 Claims
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1. A method of managing packet transmission at an interface between a network medium and a host system, the method comprising:
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parsing an incoming packet comprising a data payload destined for an application running in the host system memory, wherein parsing an incoming packet includes determining and storing a classifier for the incoming packet; generating one or more pointers to data fields in the incoming packet; storing the incoming packet in a buffer memory; using the one or more pointers to retrieve data associated with the data fields from the buffer memory; applying one or more rules to the retrieved data to determine a priority for transferring the data payload associated with the retrieved data from the buffer memory to the host system memory, wherein the classifier indicates which of the one or more rules is applied to the retrieved data associated with the data fields of the incoming packet; and using the one or more pointers to transfer the data payload associated with the retrieved data from the buffer memory to an application running in the host system memory according to the determined priority. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system to manage packet transmission at an interface between a network and a host system, the system comprising:
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a packet parser to generate one or more pointers to data fields in the incoming packet and to determine a classifier for the incoming packet, wherein the incoming packet comprises a data payload destined for an application running in the host system memory; a packet index queue to store the one or more pointers to the data fields; a packet data buffer to store the incoming packet; a packet index fetch engine to retrieve data associated with the data fields from the packet data buffer by using the pointers from the packet index queue; and a rule check engine to apply one or more rule match operations on the retrieved data to determine a priority for transferring the data payload associated with the retrieved data from the buffer memory to an application running in the host system memory, wherein the classifier indicates which of the one or more rules is applied to the retrieved data. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A single integrated circuit, comprising:
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a microprocessor, the microprocessor to perform the steps of; parsing an incoming packet, wherein the incoming packet comprises a data payload destined for an application running in the host system memory, and wherein parsing an incoming packet includes determining and storing a classifier for the incoming packet; generating one or more pointers to data fields in the incoming packet; storing the incoming packet in a buffer memory; using the one or more pointers to retrieve data associated with the data fields from the buffer memory; applying one or more rules to the retrieved data to determine a priority for transferring the data payload associated with the retrieved data from the buffer memory to the host system memory, wherein the classifier indicates which of the one or more rules is applied to the retrieved data; and using the one or more pointers to transfer the data payload associated with the retrieved data from the buffer memory to an application running in the host system memory according to the determined priority.
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Specification