SNAX/APC Application Programming Manual

Application Prototype Simulator
SNAX/APC Application Programming Manual—138786
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PREPARE-TO-RECEIVE (SF4)
conversation. This is functionally equivalent to a PREPARE-TO-RECEIVE
request with request type set to CO (Confirm).
FL
specifies that SNAX/APC is to transmit the contents of the local LU’s send
buffer to the partner TP and then place the conversation in the Receive state.
The PREPARE-TO-RECEIVE verb completes as soon as the local LU’s send
buffer is transmitted; no confirmation is required.
CO
specifies that SNAX/APC is to transmit the contents of the local LU’s send
buffer to the partner TP and then request confirmation from the partner TP. The
PREPARE-TO-RECEIVE verb does not complete until the partner TP responds
to the request for confirmation. If the partner TP responds to the request for
confirmation affirmatively, the conversation is placed in the Receive state.
Otherwise, the return code indicates the new state of the conversation.
SNAX/APC rejects a CO request if the synchronization level of the conversation
is NONE.
Lock (S)
must be blank if Type is FL or Type is SL and the synchronization level of the
conversation is N (none).
Lock must be S if Type is CO or Type is SL and the synchronization level of the
conversation is C (confirm).
SNAX/APC does not support the long lock (Lock set to L) specified by the LU 6.2
definition.
Reply Fields
IPC Return Code
displays the value of HEADER-RETURN-CODE returned in the IPC header reply.
IPC Return Code Detail
displays the value of HEADER-RETURN-CODE-DETAIL returned in the IPC
header reply.
UOWs In
displays the number of UOWs in this IPC message (always 1 for APS).
UOWs Out
for APS, this value is always 1. UOWs Out indicates the number of reply UOWs
contained in the reply from SNAX/APC.