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DRDA message

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2001-08-29
2001-11-03
  • Surya Challa

    Surya Challa - 2001-08-29

    Hi,
      What is the DRDA message structure? If I want to build/interpret login packet (or SQL statement packet) how should I go about it? any help would be appreciated

    Thanks,
    Surya

     
    • Brian Bruns

      Brian Bruns - 2001-11-03

      The DRDA format is roughly:

      DSS (Data Stream Structures, at least 1 per
           packet and they may be 'chained').
      |  ---> DDM command (such as ACCRDB)
               |
                -----> FD:OCA data (some DDM commands)

      The DSS is the protocol header (basically), DDM commands are the PDUs, and FDOCA is a encoding mechanism for text and binary data.

      All very un-unixish but once you translate the terms it begins to make sense.

       

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