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Transparent inline content inspection and modification in a TCP session

  • US 20160105469A1
  • Filed: 10/13/2014
  • Published: 04/14/2016
  • Est. Priority Date: 10/13/2014
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • during a TCP session established between a sending entity and a receiving entity, inspecting a stream of TCP traffic;

    upon determining that a portion of the stream is to be rewritten, the portion comprising one or more input data packets received from the sending entity, placing, in an input record, the one or more input data packets constituting the portion;

    returning to the sending entity an acknowledgement for each input data packet received except for a last input data packet constituting the portion;

    generating, from the one or more input data packets in the input record, a modified portion of the stream, the modified portion comprising one or more output data packets to be sent to the receiving entity;

    placing in an output record the one or more output data packets;

    forwarding into the stream of TCP traffic to the receiving entity the one or more output data packets in the output record; and

    upon receipt of acknowledgements from the receiving entity for each output data packet in the output record, transmitting an acknowledgement of the last input data packet to the sending entity.

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