The
ubt
node type is both a persistent Netgraph node type and a driver for
Bluetooth USB devices.
It implements a Bluetooth USB transport layer
as per chapter H2 of the Bluetooth Specification Book v1.1.
A new node is created when a supported USB device is plugged in.
The node has a single hook called
hook
Incoming bytes received on the device are re-assembled into HCI frames
(according to the length).
Full HCI frames are sent out on the hook.
The node will add a HCI frame indicator if the device did not send it.
HCI frames received on
hook
are transmitted out.
The node will drop the HCI frame indicator unless the device
requires it to be present.
HARDWARE
The
driver supports all Bluetooth USB devices that conform with
the Bluetooth specification v1.1, including:
3Com 3CREB96
AIPTEK BR0R02
EPoX BT-DG02
Mitsumi Bluetooth USB adapter
MSI MS-6967
TDK Bluetooth USB adapter
HOOKS
This node type supports the following hooks:
hook
single HCI frame contained in a single
Vt mbuf
structure.
CONTROL MESSAGES
This node type supports the generic control messages, plus the following:
NGM_UBT_NODE_GET_DEBUG
Returns an integer containing the current debug level for the node.
NGM_UBT_NODE_SET_DEBUG
This command takes an integer argument and sets the current debug level
for the node.
NGM_UBT_NODE_GET_QLEN
This command takes a parameter that specifies the queue number and returns
the current maximal length of the queue for the node.
NGM_UBT_NODE_SET_QLEN
This command takes two parameters that specify the queue number and the maximum
length of the queue and sets the maximal length of the queue for the node.
NGM_UBT_NODE_GET_STAT
Returns various statistic information for the node, such as: number of
bytes (frames) sent, number of bytes (frames) received and number of
input (output) errors.
NGM_UBT_NODE_RESET_STAT
Reset all statistic counters to zero.
SHUTDOWN
This node shuts down when the corresponding USB device is un-plugged.
Isochronous USB transfers are broken.
This means that the USB device will not be able to transfer SCO data (voice).
USB interrupt transfers are implemented as bulk-in transfers (not really a bug).
