DLPI Programmer's Guide

30 Chapter 1
Introduction to DLPI
DLPI Services
Local Management Services
The local management services apply to the connection and
connectionless modes of communication. These services, which fall
outside the scope of standards specification, define the method for
initializing a stream that is connected to a DLS provider. DLS provider
information reporting services are also supported by local management
facilities.
Information Reporting Service
This service provides information about the DLPI stream to the DLS
user. The message DL_INFO_REQ requests the DLS provider to return
operating information about the stream. The DLS provider returns the
information in a DL_INFO_ACK message as shown in Figure 1-3.
Figure 1-3 Message Flow: Information Reporting
Raw Mode Data
Transfer
DL_HP_RAWDATA_REQ
DL_HP_RAWDATA_IND
XID and TEST XID DL_XID_REQ
DL_XID_IND
DL_XID_RES
DL_XID_CON
TEST DL_TEST_REQ
DL_TEST_IND
DL_TEST_RES
DL_TEST_CON
Phase of
Communication
Service Primitives
DL_INFO
request
DL_INFO
acknowledge