Relay device, packet filtering method, and packet filtering...

Details Relay device, packet filtering method, and packet filtering... Relay device, packet filtering method, and packet filtering...

2005-05-26

2009-12-15

Ton, Dang T (Department: 2419)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S402000, C370S404000

Reexamination Certificate

active

07633957

ABSTRACT:
A relay device10is a relay device for relaying a communication message on a packet-by-packet basis, which comprises an order determiner13for determining whether a packet received is one received in an order to be received, a packet holder14for, when it is determined that the packet is not one received in the order to be received, holding the packet, and for performing such a control as to relay the packet, a merger15for merging a payload of the received packet with a payload of the held packet, a verifier16for verifying whether a payload of a packet satisfies a predetermined rule, and a relay controller17for, when a packet satisfies the rule, performing such a control as to execute relay of the packet. This prevents an increase of a communication delay and enables detection of an irregular communication message in an application layer protocol, irrespective of types of protocols.

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