IBM SC34-6814-04 - Page 253

DFHXTENF CSECT
DFHVM XTENF
ENTRY DFHXTENA
DFHXTENA DS 0H
STM R14,R12,12(R13) save registers
BALR R11,0 set up base register
USING *,R11
*
USING DFHUEPAR,R1 DFHUEH parameter list
*
* Could check the terminal ID at this point. In this
* program we assume it is valid. We also choose to accept
* START requests and reject Transient Data trigger level
* events.
*
L R2,UEPICEVT access type of request
CLC 0(2,R2),START START command?
BE STARTCMD yes
*
CLC 0(2,R2),STARTDAT START command with data?
BNE NOTSTART no, must be Transient Data
*
STARTCMD DS 0H
*
* Accept the default netname if we are Function Shipping.
* Otherwise build a netname.
*
L R2,UEPICFS access FS information
CLI 0(R2),UEPICFY Function Shipping?
BNE BLDNETNM no, build a netname
*
LH R15,NETNAME accept the default netname
B EXIT
*BLDNETNM DS 0H
*
* Build a netname by taking the first character of the
* terminal ID and appending it to the characters ’CICS’.
*
L R2,UEPICNTO access the output netname field
L R3,UEPICRTR access ID of requested terminal
MVC 0(8,R2),=C’CICS ’
MVC 4(1,R2),0(R3) first character of terminal ID
LH R15,NETNAME netname returned
B EXIT
*
NOTSTART DS 0H
LH R15,UNKNOWN reject Transient Data trigger *
level events
*
EXIT DS 0H
L R14,12(R13) restore registers except 15
LM R0,R12,20(R13) which contains the return code
BR R14
*
***********************************************************************
* Local constants
***********************************************************************
START DC AL2(UEPICES)
STARTDAT DC AL2(UEPICESD)
NETNAME DC AL2(UERCNETN)
UNKNOWN DC AL2(UERCTEUN)
*
DFHEND DFHXTENF
Figure 2. Sample program for XALTENF and XICTENF exits
Chapter 1. Global user exit programs 231