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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
	     timeout, 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 careful 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 Blue-
	     tooth device performs an Inquiry operation, the results will be
	     put in cache.  Later when a Bluetooth device establishes a base-
	     band connection, it will try to find the matching entry in the
	     cache and use it.	This might speed up establishment of the base-
	     band connection.

     net.bluetooth.l2cap.rtx_timeout
	     A read-write integer variable that controls the Link Layer Con-
	     trol and Adaptation Protocol (L2CAP) Retransmission Timeout (RTX)
	     (in seconds).  Every time the L2CAP layer submits a control com-
	     mand, 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 com-

HISTORY

     The ng_bluetooth module was implemented in FreeBSD 5.0.

AUTHORS

     Maksim Yevmenkin <m_evmenkin@yahoo.com>

FreeBSD 5.4		       November 9, 2002 		   FreeBSD 5.4

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