[ Previous | Next | Contents | Glossary | Home | Search ]
AIX Version 4.3 Communications Technical Reference, Volume 1



Requests the data link service (DLS) provider to unbind a data link service access point (DLSAP).


The message consists of one M_PROTO message block, which contains the following structure:

typedef struct 
   ulong dl_primitive;
} dl_unbind_req_t;

This structure is defined in /usr/include/sys/dlpi.h.


The DL_UNBIND_REQ primitive requests that the DLS provider unbind the DLSAP that had been bound by a previous DL_BIND_REQ primitive. If one or more DLSAPs were bound to the stream with a DL_SUBS_BIND_REQ primitive and have not been unbound with a DL_SUBS_UNBIND_REQ primitive, the DL_UNBIND_REQ primitive unbinds all the subsequent DLSAPs for that stream along with the DLSAP bound with the previous DL_BIND_REQ primitive.

At the successful completion of the request, the DLS user can issue a new DL_BIND_REQ primitive for a potentially new DLSAP.


dl_primitive Specifies the DL_UNBIND_REQ primitive.


Valid The primitive is valid in the DL_IDLE state.
New The resulting state is DL_UNBIND_PENDING.


Successful The DL_OK_ACK primitive is sent to the DLS user, and the resulting state is DL_UNBOUND.
Unsuccessful The DL_ERROR_ACK primitive is returned, and the resulting state is unchanged.

Error Codes

DL_OUTSTATE Indicates the primitive was issued from an invalid state.
DL_SYSERR Indicates a system error occurred. The system error is indicated in the DL_ERROR_ACK primitive.

Implementation Specifics

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

Related Information

The DL_BIND_REQ primitive, DL_ERROR_ACK primitive, DL_OK_ACK primitive, DL_SUBS_BIND_REQ primitive, DL_SUBS_UNBIND_REQ primitive.

[ Previous | Next | Contents | Glossary | Home | Search ]