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Classifying data packets processed by drivers included in a stack

  • US 6,185,568 B1
  • Filed: 06/15/1999
  • Issued: 02/06/2001
  • Est. Priority Date: 09/19/1997
  • Status: Expired due to Term
First Claim
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1. A method for classifying data packets processed by a plurality of drivers included in a stack comprising the steps of:

  • storing, in a shared reference pattern database shared by multiple drivers, at least one reference pattern and corresponding classification information, the shared reference pattern database containing a specific database for all specific reference patterns regardless of classification family and, for each classification family, a general database for general reference patterns pertaining to that classification family;

    searching the shared reference pattern database for a reference pattern that matches a classification pattern created from a data packet by searching first the specific database for the classification pattern followed, if necessary, by searching the general database pertaining to the classification family for the classification pattern; and

    if the classification pattern matches a stored reference pattern, processing the data packet using the classification information corresponding to the matched reference pattern.

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