NAME

DL_DATA_ACK_IND (dl_data_ack_ind_t) - conveys one DLSDU from the DLS Provider to the DLS User. This primitive indicates the arrival of a non-null, non-duplicate DLSDU from a peer Data Link User entity.

SYNOPSIS

Consists of one M_PROTO message block containing the structure shown below, followed by one or more M_DATA blocks containing one or more bytes of data. The amount of user data that may be transferred in a single DLSDU is limited. This limit is conveyed by the parameter dl_max_sdu in the DL_INFO_ACK primitive.

typedef struct {
    t_uscalar_t  dl_primitive;
    t_uscalar_t  dl_dest_addr_length;
    t_uscalar_t  dl_dest_addr_offset;
    t_uscalar_t  dl_src_addr_length;
    t_uscalar_t  dl_src_addr_offset;
    t_uscalar_t  dl_priority;
    t_uscalar_t  dl_service_class;
} dl_data_ack_ind_t;

PARAMETERS

dl_primitive

conveys DL_DATA_ACK_IND

dl_dest_addr_length

conveys the length of the DLSAP address of the destination DLS User. If the destination user is implemented using DLPI, this address is the full DLSAP

dl_dest_addr_offset

conveys the offset from the beginning of the M_PROTO message block where the destination DLSAP address begins.

dl_src_addr_length

conveys the length of the DLSAP address of the source DLS User.

dl_src_addr_offset

conveys the offset from the beginning of the M_PROTO message block where the source DLSAP address begins. address returned on the DL_BIND_ACK.

dl_priority

priority provided for the data unit transmission.

dl_service_class

specifies whether or not an acknowledge capability in the medium access control sublayer is to be used for the data unit transmission.

DL_RQST_RSP

use acknowledgement service in the medium access control sublayer.

DL_RQST_NORSP

no acknowledgement service to be used in the medium access control sublayer.

STATE

This message is valid in state DL_IDLE.

NEW STATE

The resulting state is unchanged.