Patent ID: 7760763
Filing Date: 2010-07-20
Classification: H04L

Abstract:
1. A packet transfer controlling apparatus comprising: a depth storage hardware unit that stores, in controlling transfer of a packet, a pattern indicative of a type of information to be extracted from the packet and a depth from a head of the packet, the depth being indicative of a position of the information to be extracted, and the pattern and the depth being stored in association with each other; a depth deriving unit that derives, when a setting of the pattern is accepted, the depth of the information to be extracted from the input packet by searching the depth storage unit based on the pattern and obtaining the depth stored in association with the pattern; an extracting unit that sequentially extracts the information from the head of the packet when the input of the packet is accepted; and a determining unit that determines whether the information extracted by the extracting unit is positioned at a location deeper than the depth derived by the depth deriving unit, and controls to continue the information extraction by the extracting unit when determining that the information is not yet positioned at the location deeper than the derived depth, and to end the information extraction by the extracting unit when determining that the information is positioned at the location deeper than the derived depth.