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  seconds) 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 connection, 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
            variable.  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>

Debian                                          November 9, 2002                                 NG_BLUETOOTH(4)