gtps2m4b | ACF/SNA Data Communications Reference |
Figure 102 illustrates the extended TPF inbound message flow.
Figure 102. Extended TPF Inbound Message Flow
The PSV name is passed to the exit as a way of identifying the functions
and processing required. The PSV name may be used to infer the
characteristics of the input message, based upon its source, because each PSV
name is unique. A PSV name may share a process with other PSVs or may
be associated with a unique process.
When control is returned to COMMSRCE from the exit routine, COMMSRCE
then:
- Sets the ECB flag to indicate either an SNA or non-SNA message.
- Sets the ECB field EBROUT to the RID or LEID returned in the RCPL origin
field. This field is used by the System Error routines to return a
message to the terminal, if an error occurs in delivering or processing the
message.
- Starts the appropriate trace and data collection routines to capture
information for debugging and performance analysis.
- Starts the appropriate routine to deliver the message to the destination
set in the RCPL. The destination can be:
- an application,
- the Log Processor,
- the Unsolicited Message Package,
- an LEID Addressed End Point, or
- a RID Addressed Logical Unit.