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The following table shows the IEEE 1394 unit filter driver IOCTLs with a description of the purpose of each.
| Programming element | Description |
|---|---|
| IOCTL_UNIT_ALLOCATE_LOCAL_PLUG | This IOCTL permits the caller to allocate and export a local plug. |
| IOCTL_UNIT_CONNECTION_REQUEST_PROCESSED | This IOCTL permits a subunit to notify the unit filter driver that it has completed processing a previous UNIT_ConnectToRemotePlugCB request. |
| IOCTL_UNIT_DEREFERENCE_CONNECTION_PLUG | This IOCTL permits a subunit to release and free any resources associated with a remote plug provided by a previous call to UNIT_ConnectToRemotePlugCB. |
| IOCTL_UNIT_DEREGISTER_SUBUNIT | This IOCTL permits a subunit to remove itself from global consideration to the unit filter driver. |
| IOCTL_UNIT_DISCONNECTION_REQUEST_PROCESSED | This IOCTL permits a subunit to notify the unit driver that it has completed processing a previous UNIT_DisconnectFromRemotePlugCB request. |
| IOCTL_UNIT_FREE_LOCAL_PLUG | This IOCTL permits the caller to free a previously allocated local plug. |
| IOCTL_UNIT_PROCESS_REGISTRY_PLUGS | This IOCTL reads plug definitions from the registry and calls the allocate and free callbacks into the subunit to process them. |
| IOCTL_UNIT_QUERY_LOCAL_PLUGS | This IOCTL permits the caller to determine the state of the plugs that are associated with your registered subunit. |
| IOCTL_UNIT_REGISTER_SUBUNIT | This IOCTL permits a subunit to provide a group of functions that the Unit filter driver should call in particular situations. |
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