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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