Analysis of data streams
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United States of America Patent
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Sep 25, 2001
Grant Date -
N/A
app pub date -
Oct 27, 1998
filing date -
Nov 27, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of processing data contained in data packets comprises storing a set of microcode instructions of which some are test instructions prescribing a respective test between a data pattern in a packet and a test pattern; defining by means of bit masks a respective multiplicity of programs each consisting a group of instructions selected from the said set of instructions; providing a particular one of said bit masks; reading out from storage the selected group of instructions in the program defined by said particular one of said bit masks, said selected group including at least one of said test instructions; and executing the instructions in the selected group on data packets. Matches between data patterns in said packets and a test pattern defined by said at least one test instruction may be detected. The invention preferably includes reading buffer data and applying to data packets appearing sequentially in the data a selected group of said instructions which independently test data of the data packets in turn.
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