DLPI Programmer's Guide

38 Chapter 1
Introduction to DLPI
DLPI Services
Figure 1-15 Message Flow: DLS Provider Rejection of a Connection
Establishment Attempt
Figure 1-16 through Figure 1-18 illustrate the situation where the
calling DLS user chooses to abort a previous connection attempt. The
DLS user issues DL_DISCONNECT_REQ at some point following a
DL_CONNECT_REQ. The resulting sequence of primitives depends on
the relative timing of the primitives involved, as defined in the following
time sequence diagrams.
Figure 1-16 Message Flow: Both Primitives are Destroyed by Provider
Figure 1-17 Message Flow: DL_DISCONNECT Indication Arrives before
DL_CONNECT Response is Sent
DL_CONNECT
request
DL_DISCONNECT
indication
DL_CONNECT
request
DL_OK
acknowledge
DL_DISCONNECT
request
DL_CONNECT
request
DL_OK
acknowledge
DL_CONNECT
DL_DISCONNECT
indication
indication
DL_DISCONNECT
request