Method for network packet filtering based on a conditional expression table

摘要

A filter for processing a network packet can have a plurality of masks (0,1,...,M-1) for masking the packet, and a storage unit configured to correspond to the plurality of first masks for storing a match bit map (20). In addition, the filter can have a table (30) configured to apply the match bit map thereto. If upon applying the match bit map (20) to the table (30) results in a match, then at least one specified action is implemented on the packet.