ng_ubt(4)

NAME

ng_ubt - Netgraph node type that is also a driver for Blue

tooth USB

devices

SYNOPSIS

#include <sys/types.h>
#include <netgraph/bluetooth/include/ng_ubt.h>

DESCRIPTION

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 re

ceived 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 ng_ubt driver supports all Bluetooth USB devices that

conform with

the Bluetooth specification v1.1, including:

+o 3Com 3CREB96

+o AIPTEK BR0R02

+o EPoX BT-DG02

+o Mitsumi Bluetooth USB adapter

+o MSI MS-6967

+o TDK Bluetooth USB adapter

HOOKS

This node type supports the following hooks:

hook single HCI frame contained in a single mbuf struc

ture.

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 lev

el 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.

SEE ALSO

netgraph(4), ugen(4), usb(4), ngctl(8)

HISTORY

The ubt node type was implemented in FreeBSD 5.0.

AUTHORS

Maksim Yevmenkin <m_evmenkin@yahoo.com>

BUGS

Isochronous USB transfers are broken. This means that the

USB device

will not be able to transfer SCO data (voice). USB inter

rupt transfers

are implemented as bulk-in transfers (not really a bug).

BSD September 13, 2004

BSD