HP-UX SNAplus2 R7 APPC Programmer's Guide

APPC Conversation Verbs
MC_CONFIRMED and CONFIRMED
4.4 MC_CONFIRMED and CONFIRMED
The MC_CONFIRMED or CONFIRMED verb replies to a confirmation request from the partner TP. It informs the
partner TP that the local TP has not detected an error in the received data.
Note
This verb can be used only in a half-duplex conversation; it is not valid in a full-duplex
conversation.
Because the TP issuing the confirmation request waits for a confirmation, the [MC_]CONFIRMED verb synchronizes
the processing of the two TPs.
4.4.1 Sources of Confirmation Requests
A confirmation request is issued by one of the following verbs in the partner TP:
• [MC_]CONFIRM
• [MC_]PREPARE_TO_RECEIVE if ptr_type is set to AP_SYNC_LEVEL and the conversation’s synchronization
level (established by the [MC_]ALLOCATE verb) is AP_CONFIRM_SYNC_LEVEL
• [MC_]DEALLOCATE if dealloc_type is set to AP_SYNC_LEVEL and the conversation’s synchronization level
(established by the [MC_]ALLOCATE verb) is AP_CONFIRM_SYNC_LEVEL
• [MC_]SEND_DATA if type is set to AP_SEND_DATA_CONFIRM and the conversation’s synchronization level
(established by the [MC_]ALLOCATE verb) is AP_CONFIRM_SYNC_LEVEL
4.4.2 Receiving Confirmation Requests
A confirmation request is received by the local TP through the what_rcvd parameter of one of the following verbs:
• [MC_]RECEIVE_IMMEDIATE
• [MC_]RECEIVE_AND_WAIT
• [MC_]RECEIVE_AND_POST
The local TP can issue the MC_CONFIRMED or CONFIRMED verb only if the what_rcvd field contains one of
the following values:
• AP_CONFIRM_WHAT_RECEIVED, AP_DATA_CONFIRM,orAP_DATA_COMPLETE_CONFIRM
• AP_CONFIRM_SEND, AP_DATA_CONFIRM_SEND,orAP_DATA_COMPLETE_CONFIRM_SEND
• AP_CONFIRM_DEALLOCATE, AP_DATA_CONFIRM_DEALLOCATE,or
AP_DATA_COMPLETE_CONFIRM_DEALL
4.4.3 VCB Structure: MC_CONFIRMED
UNIX
The definition of the VCB structure for the MC_CONFIRMED verb is as follows:
typedef struct mc_confirmed
{
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