DLPI Primitives
Raw Mode Service Primitives
If the DLS provider accepts the data for transmission, there is no response. This does not, however, guarantee that the data will be delivered to the destination DLS user, since the connectionless data transfer is not a confirmed service.
If the request is erroneous, a DL_ERROR_ACK is returned, and the resulting state is unchanged.
Reasons for Failure
DL_BADPRIM
Request was issued from a state in which the
DL_HP_RAWDATA_REQ was not recognized.
DL_SYSERR
A system error has occurred and the UNIX system error is indicated in the DL_ERROR_ACK.
DL_HP_RAWDATA_IND
Conveys one completely formatted DLSDU from the DLS provider to the DLS user. The DLSDU contains the complete Link and MAC Level headers.
Format
The message consists of one M_PROTO message block containing the structure shown below, followed by one or more M_DATA message 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 {
ulong dl_primitive; } dl_hp_rawdata_ind_t;
Parameters
dl_primitive
DL_HP_RAWDATA_IND
State
The message is valid in state DL_IDLE.
New State
92 | Chapter 2 |