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NG_BLUETOOTH(4)	       FreeBSD Kernel Interfaces Manual	       NG_BLUETOOTH(4)

NAME
     ng_bluetooth -- placeholder for global Bluetooth variables

SYNOPSIS
     #include <sys/types.h>
     #include <netgraph/bluetooth/include/ng_bluetooth.h>

DESCRIPTION
     The ng_bluetooth module is	a placeholder for global Bluetooth variables.
     All Bluetooth variables can be examined and changed via sysctl(8).

   Bluetooth Variables
     Below is the description of default variables.  Each Bluetooth module
     might add its own variables to the	tree.

     net.bluetooth.version
	  A read-only integer variable that shows the current version of the
	  Bluetooth stack.

     net.bluetooth.hci.command_timeout
	  A read-write integer variable	that controls the Host Controller
	  Interface (HCI) command timeout (in seconds),	i.e., how long the HCI
	  layer	will wait for the Command_Complete or Command_Status event
	  from a Bluetooth device.

     net.bluetooth.hci.connection_timeout
	  A read-write integer variable	that controls the HCI connection time-
	  out, i.e. how	long the HCI layer will	wait for the
	  Connection_Complete event.  Normally this should not be required as
	  Bluetooth devices have connection timeout of their own and will send
	  event	back.  This timeout is required	to ensure that no connection
	  will stall in	case when the HCI transport layer is broken.  Be care-
	  ful when changing this variable.  Make sure you understand what you
	  are doing.

     net.bluetooth.hci.max_neighbor_age
	  A read-write integer variable	that controls time-to-live (in sec-
	  onds)	for entries in the HCI neighbor	cache.	Every time a Bluetooth
	  device performs an Inquiry operation,	the results will be put	in
	  cache.  Later	when a Bluetooth device	establishes a baseband connec-
	  tion,	it will	try to find the	matching entry in the cache and	use
	  it.  This might speed	up establishment of the	baseband connection.

     net.bluetooth.l2cap.rtx_timeout
	  A read-write integer variable	that controls the Link Layer Control
	  and Adaptation Protocol (L2CAP) Retransmission Timeout (RTX) (in
	  seconds).  Every time	the L2CAP layer	submits	a control command, the
	  RTX timeout is set.  The value of the	RTX timeout should be greater
	  or equal to the value	of the HCI connection timeout.	Be careful
	  when changing	this variable.	Make sure you understand what you are
	  doing.

     net.bluetooth.l2cap.ertx_timeout
	  A read-write integer variable	that controls the L2CAP	Extended
	  Retransmission Timeout (ERTX)	(in seconds).  In some cases remote
	  peer may respond with	PENDING	status to the L2CAP control command.
	  In this case the L2CAP command timeout is reset to the ERTX timeout
	  value.  The value of the ERTX	timeout	should be greater or equal to
	  the value of the RTX timeout.	 Be careful when changing this vari-
	  able.	 Make sure you understand what you are doing.

SEE ALSO
     ng_btsocket(4), ng_hci(4),	ng_l2cap(4), sysctl(8)

HISTORY
     The ng_bluetooth module was implemented in	FreeBSD	5.0.

AUTHORS
     Maksim Yevmenkin <m_evmenkin@yahoo.com>

FreeBSD	10.1		       November	9, 2002			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=ng_bluetooth&sektion=4&manpath=FreeBSD+10.1-RELEASE>

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