APPARATUS AND METHOD FOR CONVERTING THE VERSION OF IP PACKET

摘要

An apparatus and a method for converting a version of an IP packet are provided to normally convert basic functions defined in RFC(Request For Comments)2765 as well as expansion functions which are not defined in the RFC2765, thereby converting all functions attached to an IPv4 packet or an IPv6 packet. An IPv4 packet header checker(51) checks fields of a header included in a predetermined IPv4 packet. An IPv4 expansion function recognizer(53) recognizes a field where a value for an expansion function is recorded, among the fields of the IPv4 packet header, when a value for showing that the expansion function is attached to the IPv4 packet is recorded in a predetermined field. An IPv4/IPv6 expansion function converter(54) converts the field where the value for the recognized expansion function is recorded into an IPv6 type field corresponding to the field where the value for the expansion function is recorded.