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PACKET ANALYSIS METHOD, PACKET ANALYSIS APPARATUS, RECORDING MEDIUM STORING PACKET ANALYSIS PROGRAM

  • US 20090190593A1
  • Filed: 01/13/2009
  • Published: 07/30/2009
  • Est. Priority Date: 01/29/2008
  • Status: Active Grant
First Claim
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1. A packet analysis method for analyzing content of communication obtained as a result of monitoring or capturing a packet passing through a network, the packet analysis method comprising:

  • a procedure of 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 an identifier corresponding to address information in a current packet from a storage part holding an identifier in a previous packet corresponding to source or destination address information; 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.

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