Technical Reference: Communications, Volume 1

DL_TEST_IND Primitive

Purpose

Conveys the test-response indication data link service data unit (DLSDU) from the data link service (DLS) provider to the DLS user.

Structure

The primitive consists of one M_PROTO message block, which contains the following structure, followed by zero or more M_DATA blocks containing zero or more bytes of data:

typedef struct 
{
   ulong dl_primitive;
   ulong dl_flag;
   ulong dl_dest_addr_length;
   ulong dl_dest_addr_offset;
   ulong dl_src_adr_length;
   ulong dl_src_addr_offset;
} dl_test_ind_t;

Description

The DL_TEST_IND primitive conveys the test-response indication DLSDU from the DLS provider to the DLS user.

Note: This primitive applies to XID and test operations.

Parameters

dl_primitive	Specifies the DL_TEST_IND primitive.
dl_flag	Indicates flag values for the request as follows: DL_POLL_FINAL Indicates whether the poll/final bit is set.
dl_dest_addr_length	Specifies the length of the data link service access point (DLSAP) address of the destination DLS user. If the destination user is implemented using the Data Link Provider Interface (DLPI), this address is the full DLSAP address returned on the DL_BIND_ACK primitive.
dl_dest_addr_offset	Indicates where the destination DLSAP address begins. The value of this parameter is the offset from the beginning of the M_PROTO message block.
dl_src_addr_length	Specifies the length of the DLSAP address of the source DLS user.
dl_src_addr_offset	Indicates where the source DLSAP address begins. The value of this parameter is the offset from the beginning of the M_PROTO message block.

States

Valid	The primitive is valid in the DL_IDLE or DL_DATAXFER state.
New	The resulting state is unchanged.

Implementation Specifics

This primitive is part of Base Operating System (BOS) Runtime.

Related Information

The DL_BIND_ACK primitive.