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)