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NG_UBT(4)              FreeBSD Kernel Interfaces Manual              NG_UBT(4)

NAME
     ubt - Netgraph node type that is also a driver for Bluetooth USB devices

SYNOPSIS
     #include <sys/types.h>
     #include <ng_ubt.h>

DESCRIPTION
     The ubt node type is both a persistent Netgraph node type and a driver
     for Bluetooth USB devices. It implements a Bluetooth USB transport layer
     as per chapter H2 of the Bluetooth Specification Book v1.1. A new node is
     created when supported USB device is plugged.

     The node has a single hook called hook.  Incoming bytes received on the
     device are re-assembled into HCI frames (according to the length). Full
     HCI frames are sent out on the hook. The node will add HCI frame
     indicator if device did not send it. HCI frames received on hook are
     transmitted out. The node will drop HCI frame indicator unless device
     requires it to be present.

HOOKS
     This node type supports the following hooks:

     hook    single HCI frame contained in single mbuf structure.

CONTROL MESSAGES
     This node type supports the generic control messages, plus the following:

     NGM_UBT_NODE_GET_DEBUG
          Returns an integer containing the current debug level for the node.

     NGM_UBT_NODE_SET_DEBUG
          This command takes an integer argument and sets current debug level
          for the node.

     NGM_UBT_NODE_GET_QLEN
          This command takes a parameter that specifies queue number and
          returns current maximal length of the queue for the node.

     NGM_UBT_NODE_SET_QLEN
          This command takes two parameters that specify queue number and
          maximum length of the queue and sets maximal length of the queue for
          the node.

     NGM_UBT_NODE_GET_STAT
          Returns various statistic information for the node, such as: number
          of bytes (frames) sent, number of bytes (frames) received and number
          of input (output) errors.

     NGM_UBT_NODE_RESET_STAT
          Reset all statistic counters to zero.

SHUTDOWN
     This node shuts down when the corresponding USB device is un-plugged.

BUGS
     Isochronous USB transfers are probably broken. It means that USB device
     probably will not be able to transfer SCO data (voice). Driver does not
     support firmware upgrade procedure. USB interrupt transfers are
     implemented as bulk-in transfers (not really a bug).

SEE ALSO
     usb(4), netgraph(4), ngctl(8)

HISTORY
     The ubt node type was implemented in FreeBSD 5.0.

AUTHORS
     Maksim Yevmenkin <m_evmenkin@yahoo.com>

FreeBSD 11.0-PRERELEASE          June 14, 2002         FreeBSD 11.0-PRERELEASE

NAME | SYNOPSIS | DESCRIPTION | HOOKS | CONTROL MESSAGES | SHUTDOWN | BUGS | SEE ALSO | HISTORY | AUTHORS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=ng_ubt&sektion=4&manpath=FreeBSD+5.0-RELEASE>

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