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.\" Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $Id: sdpd.8,v 1.1 2004/01/13 19:31:54 max Exp $
.\" $FreeBSD$
.\"
.Dd January 13, 2004
.Dt SDPD 8
.Os
.Sh NAME
.Nm sdpd
.Nd Bluetooth Service Discovery Protocol daemon
.Sh SYNOPSIS
.Nm
.Op Fl dh
.Op Fl c Ar path
.Op Fl g Ar group
.Op Fl u Ar user
.Sh DESCRIPTION
The
.Nm
daemon keeps track of the Bluetooth services registered on the host
and responds to Service Discovery inquiries from the remote Bluetooth devices.
.Pp
In order to use any service remote Bluetooth device need to send Service
Search and Service Attribute or Service Search Attribute request over
Bluetooth L2CAP connection on SDP PSM (0x0001).
The
.Nm
daemon will try to find matching Service Record in its Service Database
and will send appropriate response back.
The remote device then will process the response, extract all required
information and will make a separate connection in order to use the service.
.Pp
Bluetooth applications, running on the host, register services with
the local
.Nm
daemon.
Operation like service registration, service removal and service change are
performed over the control socket.
It is possible to query entire content of the
.Nm
Service Database with
.Xr sdpcontrol 8
by issuing
.Cm browse
command on the control socket.
.Pp
The command line options are as follows:
.Bl -tag -width indent
.It Fl d
Do not detach from the controlling terminal.
.It Fl c Ar path
Specify path to the control socket.
The default path is
.Pa /var/run/sdp .
.It Fl g Ar group
Specifies the group the
.Nm
should run as after it initializes.
The value specified may be either a group name or a numeric group ID.
This only works if
.Nm
was started as root.
The default group name is
.Dq Li nobody .
.It Fl h
Display usage message and exit.
.It Fl u Ar user
Specifies the user the
.Nm
should run as after it initializes.
The value specified may be either a user name or a numeric user ID.
This only works if
.Nm
was started as root.
The default user name is
.Dq Li nobody .
.El
.Sh CAVEAT
The
.Nm
daemon
will listen for incoming L2CAP connections on a wildcard BD_ADDR.
.Pp
In case of multiple Bluetooth devices connected to the same host it is
possible to specify which services should be
.Dq bound
to which Bluetooth device.
Such assignment should be done at service registration time.
.Pp
Requests to register, remove or change service can only be made via the
control socket.
The
.Nm
daemon will check peer's credentials and will only accept the request if
the application has the same effective user ID as the
.Dq Li root
user ID.
.Pp
The
.Nm
daemon does not check for duplicated Service Records.
It only performs minimal checking on the service data sent in the Service
Register request.
It is assumed that application must obtain all required resources such
as RFCOMM channels etc., before registering the service.
.Sh FILES
.Bl -tag -width ".Pa /var/run/sdp" -compact
.It Pa /var/run/sdp
.El
.Sh SEE ALSO
.Xr sdp 3 ,
.Xr sdpcontrol 8
.Sh AUTHORS
.An Maksim Yevmenkin Aq Mt m_evmenkin@yahoo.com
.Sh BUGS
Most likely.
Please report if found.