gtpi1m4uSystem Installation Support Reference

SNA Message Recovery

The transaction analysis exit routine (CMVU) is activated by the SNA communication source program (CITT) when the system message recovery option is included in the system (the value of the NSRTE parameter of the SIP SNANET macro is greater than 0) and the SNA communication transaction analysis option is requested (by the ZNKEY TRANA-YES command).

You should modify the segment to perform the desired transaction analysis function.

Input

R1
Input message in AM0SG format

R2
RVT1 entry of the SLU

R3
RVT2 entry of the SLU

R4
SRT entry allocated for this message

R6
The time-out factor multiplier defined by the ZNKEY RECIT-m,s command (CK2ITM field in CTK2).

R7
Recovery switch: 1=recover, 0=do not recover. It is set to recover (1) on input.

D0
Input message in AM0SG format.

EBW024-EBW039
Register save area (R1-R4) used by CITT.

Programming Considerations

Registers R1-R4 are saved by CITT in the ECB, and are restored when CMVU returns control to CITT.