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Mapping SNA session flow control to TCP flow control

  • US 6,049,833 A
  • Filed: 08/29/1997
  • Issued: 04/11/2000
  • Est. Priority Date: 08/29/1997
  • Status: Expired due to Term
First Claim
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1. For transferring information between a Transmission Control Protocol connection and a Systems Network Architecture connection, a method comprising the steps of:

  • A) from the SNA connection, receiving information to be forwarded over the TCP connection;

    B) forwarding at least some of the received information by transmitting bytes over the TCP connection;

    C) monitoring the TCP connection for acknowledgment messages that acknowledge transmitted bytes and specify a TCP window size;

    D) monitoring the SNA connection for request messages that include pacing requests; and

    E) in response to reception of a pacing request from the SNA connection, transmitting over the SNA connection a pacing response only if forwarding the previously received information would not result in a number of unacknowledged bytes transmitted into the TCP connection that exceeds the specified window size.

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