Method and system for reassembling packets prior to searching
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United States of America Patent
Stats
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Feb 3, 2009
Grant Date -
Mar 1, 2007
app pub date -
Aug 29, 2005
filing date -
Aug 29, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and system for inspecting a data packet stream in a computer network for patterns that fall across data packet boundaries is disclosed. This includes determining if two or more data packets are consecutive in the data packet stream, combining data payloads from the consecutive data packets, and analyzing the combined data payloads from the consecutive data packets for a plurality of patterns of character combinations, wherein the maximum length of the combined data payloads is one less than the maximum number of characters for a pattern having a longest length of the plurality of patterns of character combinations. This can include a content searching engine and/or a regular expression engine. There are optional aspects to return data packets to an outgoing data stream based on predetermined criteria and if the data packets are in the system for over a predetermined time period.
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