JANUS TCPLOG

Capture Janus port traffic

The JANUS TCPLOG subcommand lets you capture all input and output streams for a particular Janus port. The captured streams are written to a sequential file.

Syntax

JANUS TCPLOG ddname

Where: ddname is the DDname of the sequential dataset to contain the log.

Usage notes

• One suggested use for a file of captured streams is to provide "playback" for customer-written applications that simulate real workloads during testing of new system or application code.
• The format of the log file is shown below. All values are in binary format except where indicated.

  Bytes	Description
  0-1	Record length
  2-3	Unused
  4-11	TCP unique connection number
  12-15	Record number
  16-23	TOD value (in STCK units)
  24-27	Remote IP address
  28-31	Local IP address
  32-33	Remote port number
  34-35	Local port number
  36-36	Direction (EBCDIC character): R (received) S (sent)
  37-37	Unused
  38-39	Length of binary data
  40-n	Binary data (ASCII characters)

See also

• List of Janus commands