128 lines
4.1 KiB
Groff
128 lines
4.1 KiB
Groff
.\" Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: hcsecd.8,v 1.8 2003/09/08 18:54:20 max Exp $
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.\" $FreeBSD$
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.\"
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.Dd November 16, 2002
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.Dt HCSECD 8
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.Os
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.Sh NAME
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.Nm hcsecd
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.Nd control link keys and PIN codes for Bluetooth devices
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.Sh SYNOPSIS
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.Nm
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.Op Fl dh
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.Fl f Ar configfile
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.Sh DESCRIPTION
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The
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.Nm
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daemon controls link keys and PIN codes for Bluetooth devices.
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It opens a raw HCI socket and listens for
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.Dv Link_Key_Request ,
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.Dv PIN_Code_Request
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and
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.Dv Link_Key_Notification
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HCI events.
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.Pp
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Once a
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.Dv Link_Key_Request
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or
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.Dv PIN_Code_Request
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HCI event is received, the daemon scans the configuration file for a
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matching entry.
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The remote device BD_ADDR is used as a key.
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If no matching entry was found, the default entry will be used.
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If no default entry was found then it is assumed that no link key and no
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PIN code exists.
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For any given entry, the link key takes precedence over the PIN code.
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If a link key was not specified, the device must generate the link key from
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the PIN code.
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If an entry was found and the link key (or PIN code) exists, the
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.Dv Link_Key_Request_Reply
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(or
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.Dv PIN_Code_Request_Reply )
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command will be sent back to the device.
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Otherwise, the
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.Dv Link_Key_Request_Negative_Reply
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(or
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.Dv PIN_Code_Request_Negative_Reply )
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command will be sent back to the device.
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.Pp
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The
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.Nm
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daemon also handles HCI
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.Dv Link_Key_Notification
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events and caches link keys created from the PIN codes in memory.
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To preserve link keys between restarts the
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.Nm
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daemon dumps link keys for all entries in the
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.Pa /var/db/hcsecd.keys
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link keys file.
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If it exists, the link keys file gets processed by the
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.Nm
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daemon after it processes its main configuration file.
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The link keys file gets written every time the
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.Nm
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daemon shuts down gracefully.
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It is possible to force the
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.Nm
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daemon to re-read its main configuration file and dump the link keys file by
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sending the
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.Dv HUP
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signal to the
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.Nm
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process.
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The user is expected to not modify the link keys file by hand.
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.Pp
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The command line options are as follows:
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.Bl -tag -width indent
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.It Fl d
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Do not detach from the controlling terminal.
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.It Fl f Ar configfile
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Specify the name of the configuration file.
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The default is
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.Pa /etc/bluetooth/hcsecd.conf .
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.It Fl h
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Display usage message and exit.
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.El
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.Sh FILES
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.Bl -tag -width ".Pa /etc/bluetooth/hcsecd.conf" -compact
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.It Pa /etc/bluetooth/hcsecd.conf
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.It Pa /var/db/hcsecd.keys
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.It Pa /var/run/hcsecd.pid
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.El
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.Sh SEE ALSO
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.Xr ng_btsocket 4 ,
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.Xr ng_hci 4 ,
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.Xr hcsecd.conf 5 ,
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.Xr hccontrol 8
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.Sh AUTHORS
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.An Maksim Yevmenkin Aq Mt m_evmenkin@yahoo.com
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.Sh BUGS
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Currently there is no way to select the link key or the PIN code based on
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which local device received the request.
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Everything is based on the remote device BD_ADDR.
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An interface for external helpers to obtain link keys and PIN codes is missing.
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