NAME

DL_UNITDATA_IND (dl_unitdata_ind_t) - conveys one DLSDU from the DLS provider to the DLS user.

SYNOPSIS

The message consists of one M_PROTO message block containing the structure shown below, followed by one or more M_DATA blocks containing at least one byte 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_group_address;
} dl_unitdata_ind_t;

PARAMETERS

dl_primitive

conveys DL_UNITDATA_IND.

dl_dest_addr_length

conveys the length of the address of the DLSAP where this DL_UNITDATA_IND is intended to be delivered.

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 sending DLS user.

dl_src_addr_offset

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

dl_group_address

is set by the DLS Provider upon receiving and passing upstream a data message when the destination address of the data message is a multicast or broadcast address.

STATE

The message is valid in state DL_IDLE.

NEW STATE

The resulting state is unchanged.