NAME
bthcid
- Bluetooth Link Key/PIN Code Manager
SYNOPSIS
bthcid
[-fn]
[-d device]
[-m mode]
[-s socket_name]
bthcid
[-h]
DESCRIPTION
The
bthcid
daemon handles Link Key and PIN code requests for Bluetooth devices.
It opens a raw HCI socket and listens for the following HCI events.
Link_Key_Request
-
bthcid
scans the
/var/db/bthcid.keys
file for a cached link key matching the remote device BD_ADDR and, if
found, the
Link_Key_Request_Reply
will be sent back to the device, otherwise the
Link_Key_Request_Negative_Reply
will be sent.
Link_Key_Notification
-
When a new link key is created by the device, it will be cached for future
use in the
/var/db/bthcid.keys
link keys file, which will be created if it does not already exist.
PIN_Code_Request
-
The
bthcid
daemon checks its PIN cache for a matching remote device entry.
If no PIN is found, the
bthcid
daemon will send a message to any PIN clients that have
registered, with the device details and a timeout value.
When no clients are available or the timeout has expired,
bthcid
will send a
PIN_Code_Request_Negative_Reply
back to the device.
When a PIN is found, or if a client responds within the timeout period, a
PIN_Code_Request_Reply
will be sent back to the device.
PINs received from clients will be cached for 5 minutes until used, and may be added
to the cache prior to pairing with the
btpin(1)
utility.
Some of the functionality of
bthcid
can be handled by the Bluetooth controller directly, and cached Link
Keys may be examined, deleted or moved to device storage using the
btkey(1)
program.
The command line options are as follows:
- -d device
-
Specify the local Bluetooth device address.
The default is BDADDR_ANY.
- -f
-
Run in foreground (do not detach).
- -h
-
Display usage message and exit.
- -m
-
Specify the file mode access bits for the PIN client socket.
The default is to allow readwrite access to user and group (0660).
- -n
-
Do not listen for PIN clients.
- -s socket_name
-
Specify the socket name to listen on for PIN clients.
The default path is
/var/run/bthcid
.
FILES
/var/db/bthcid.keys
-
/var/run/bthcid
-
/var/run/bthcid.pid
-
SEE ALSO
btpin(1),
btkey(1),
bluetooth(4),
btconfig(8)
HISTORY
The
bthcid
daemon first appeared in
FreeBSD5.3
as
hcsecd.
It was ported to
NetBSD4.0
with its present name and extended to support PIN clients by
Iain Hibbert
under the sponsorship of Itronix, Inc.
AUTHORS
Maksim Yevmenkin <m_evmenkin@yahoo.com>
Iain Hibbert