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BTHCID(8)		  BSD System Manager's Manual		     BTHCID(8)

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 con‐
     troller 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
     btkey(1), btpin(1), bluetooth(4), btconfig(8)

HISTORY
     The bthcid daemon first appeared in FreeBSD 5.3 as hcsecd.	 It was ported
     to NetBSD 4.0 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

BSD			      September 29, 2006			   BSD

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