Patent ID: 8213325
Filing Date: 2012-07-03
Classification: H04L

Abstract:
1. A packet analysis method for analyzing content of communication obtained as a result of monitoring or capturing a packet passing through a network using a packet analysis apparatus connected to the network between a sending host and a receiving host, the packet analysis method comprising: a procedure of the packet analysis apparatus acquiring source or destination address information from a network layer packet header; a procedure of acquiring from the network layer packet header an identifier for which a value that increases monotonously with each sending for each source or destination address information is set; a procedure of searching for and acquiring the identifier in a previous packet having a source or destination address corresponding to source or destination address information in a current packet from a storage part of the packet analysis apparatus, wherein the previous packet is the packet received immediately prior to receiving the current packet; and a procedure of comparing the identifier in the previous packet acquired and the identifier in the current packet and determining that reordering occurs when the identifier in the current packet is smaller.