Router packet filtering and mapping

摘要

A method includes determining in a router whether a test portion of a received packet matches test data specified in a filter. The test portion is specified in the filter by a first offset parameter and a first length parameter. The received packet is modified by the router replacing data in a map portion of the packet with map data specified in the filter if the test portion matches the test data. The map portion is also specified in the filter by a second offset parameter and a second length parameter.