sdpd man page on NetBSD

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

NAME
     sdpd — Bluetooth Service Discovery Protocol daemon

SYNOPSIS
     sdpd [-dh] [-c path] [-G group] [-g group] [-u user]

DESCRIPTION
     The sdpd daemon keeps a database of Bluetooth Service Records registered
     on the host and responds to Service Discovery inquiries from remote Blue‐
     tooth devices.

     In order to discover services, remote Bluetooth devices send Service
     Search and Service Attribute or Service Search Attribute requests over
     Bluetooth L2CAP connections on the SDP PSM (0x0001).  The sdpd daemon
     will try to find matching Service Records in its Service Database and
     will return the requested record extracts for the remote device to inter‐
     pret.  The remote device will then make a separate connection in order to
     access the service.

     Bluetooth applications, running on the host, are able to insert, remove
     and update Service Records with the sdpd daemon via the control socket.
     It is possible to query entire contents of the Service Database locally
     with sdpquery(1) using the -l option.

     The command line options are as follows:

     -c path
	     Specify path to the control socket.  The default path is
	     /var/run/sdp.

     -d	     Do not detach from the controlling terminal.

     -G group
	     Grant permission to members of the group to modify the sdpd Ser‐
	     vice Database.

     -g group
	     Specifies the group the sdpd should run as after it initializes.
	     The value specified may be either a group name or a numeric group
	     ID.  This only works if sdpd was started as root.	The default
	     group name is “_sdpd”.

     -h	     Display usage message and exit.

     -u user
	     Specifies the user the sdpd should run as after it initializes.
	     The value specified may be either a user name or a numeric user
	     ID.  This only works if sdpd was started as root.	The default
	     user name is “_sdpd”.

FILES
     /var/run/sdp

SEE ALSO
     sdpquery(1), sdp(3)

     The "Service Discovery Protocol" section of the Bluetooth Core specifica‐
     tions, available at "http://www.bluetooth.com/"

HISTORY
     The original sdpd daemon first appeared in FreeBSD 5.3 and was imported
     into NetBSD 4.0 by Iain Hibbert under the sponsorship of Itronix, Inc.
     This version was rewritten by Iain Hibbert for NetBSD 6.0 in order to
     allow Bluetooth applications to fully specify service records.

AUTHORS
     Maksim Yevmenkin ⟨m_evmenkin@yahoo.com⟩
     Iain Hibbert

CAVEATS
     The sdpd daemon will listen for incoming L2CAP connections on a wildcard
     BD_ADDR.

     In case of multiple Bluetooth controllers connected to the same host it
     is possible to limit visibility of Service Records according to the con‐
     troller the connection is made through.

     Requests to insert, remove or update service records can only be made via
     the control socket.  The sdpd daemon will check the peer's credentials
     and will only accept the request when the peer is the superuser, of if
     the peer is a member of the group specified with the -G option.

     The sdpd daemon does not check for duplicated Service Records and only
     performs minimal validation of the record data sent in the Insert/Update
     Record requests.  It is assumed that application must obtain all required
     resources such as RFCOMM channels etc., before registering the service.

BUGS
     sdpd only ever generates 16-bit sequence headers, so if a response was to
     grow over UINT16_MAX, the sequence header will be wrong.

     There is no way for clients to discover the maximum packet size that sdpd
     will accept on the local socket.  Currently this is SDP_LOCAL_MTU as
     defined in <bluetooth/sdp.h>.

BSD				  May 7, 2009				   BSD
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