The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2010
Filed:
Jun. 02, 2006
David B. Kramer, Cedar Park, TX (US);
Chris P. Thron, Austin, TX (US);
Bernard Karl Gunther, Modbury Heights, AU;
David B. Kramer, Cedar Park, TX (US);
Chris P. Thron, Austin, TX (US);
Bernard Karl Gunther, Modbury Heights, AU;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A method, data processing system, and computer program product are provided for retrieving access rules using a plurality of subtables. An incoming packet that includes fields of data is received from a network. A key is formed from the fields, the key includes a number of subkeys. The subkeys are selected and each of the selected subkeys is used to search a different subtable. If a subtable entry is a pointer, a next level subtable is searched until a failure or data is encountered. If a failure occurs, a default rule is applied. If data is encountered, the key is masked using a stored mask value. The resulting masked key is compared to a stored rule. If they match, the identified rule is applied, otherwise the default rule is applied.