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Network gateway mechanism having a protocol stack proxy

  • US 6,131,163 A
  • Filed: 02/17/1998
  • Issued: 10/10/2000
  • Est. Priority Date: 02/17/1998
  • Status: Expired due to Term
First Claim
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1. A system for evaluating a data packet using a network operating system, comprising:

  • a protocol layer proxy stored in a kernel memory and executed in a kernel mode of said network operating system; and

    a sequence of instructions stored in said kernel memory and executed in the kernel mode configured to cause a processor under control of said network operating system to execute the steps of;

    evaluating said data packet in said protocol layer proxy in the kernel mode to determine whether said data packet satisfies a predetermined condition; and

    passing said data packet from said protocol layer proxy to a protocol stack that is outside the kernel mode of said network operating system only if said data packet satisfies said predetermined condition.

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