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NG_UBT(4)	       FreeBSD Kernel Interfaces Manual		     NG_UBT(4)

NAME
     ubt -- Netgraph node type that is also a driver for Bluetooth USB devices

SYNOPSIS
     #include <sys/types.h>
     #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 supported USB	device is plugged.

     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 HCI	frame indica-
     tor if device did not send	it. HCI	frames received	on hook	are transmit-
     ted out. The node will drop HCI frame indicator unless device requires it
     to	be present.

HOOKS
     This node type supports the following hooks:

     hook    single HCI	frame contained	in single 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 current debug	level
	  for the node.

     NGM_UBT_NODE_GET_QLEN
	  This command takes a parameter that specifies	queue number and
	  returns current maximal length of the	queue for the node.

     NGM_UBT_NODE_SET_QLEN
	  This command takes two parameters that specify queue number and max-
	  imum length of the queue and sets 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.

BUGS
     Isochronous USB transfers are probably broken. It means that USB device
     probably will not be able to transfer SCO data (voice). Driver does not
     support firmware upgrade procedure. USB interrupt transfers are imple-
     mented as bulk-in transfers (not really a bug).

SEE ALSO
     usb(4), netgraph(4), ngctl(8)

HISTORY
     The ubt node type was implemented in FreeBSD 5.0.

AUTHORS
     Maksim Yevmenkin <m_evmenkin@yahoo.com>

FreeBSD	9.3			 June 14, 2002			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | HOOKS | CONTROL MESSAGES | SHUTDOWN | BUGS | SEE ALSO | HISTORY | AUTHORS

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<http://www.freebsd.org/cgi/man.cgi?query=ng_ubt&sektion=4&manpath=FreeBSD+5.0-RELEASE>

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