SNAX/APC Application Programming Manual

Application Prototype Simulator

SNAX/APC Application Programming Manual—138786

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MC-PREPARE-TO-RECEIVE (SF4)

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. This is functionally equivalent to a MC-PREPARE-TO-RECEIVE

request with Type set to CO (confirm).

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 MC-PREPARE-TO-RECEIVE verb completes as soon as the local LU’s

send buffer is transmitted; no confirmation is required.

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

MC-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

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).