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BTPAND(8)                   System Manager's Manual                  BTPAND(8)

     btpand - Bluetooth PAN daemon

     btpand [-i ifname] [-m mode] -a addr -d device
            {-s service | -S service [-p psm]}
     btpand [-c path] [-i ifname] [-l limit] [-m mode] [-p psm] -d device
            {-s service | -S service}

     The btpand daemon handles Bluetooth Personal Area Networking services in
     the system.  It can operate in client mode as a Personal Area Networking
     User (PANU) or in server mode as Network Access Point (NAP), Group ad-hoc
     Network (GN) or PANU host.  btpand connects to the system via a tap(4)
     virtual Ethernet device and forwards Ethernet packets to remote Bluetooth
     devices using the Bluetooth Network Encapsulation Protocol (BNEP).

     The PANU client is the device that uses either the NAP or GN service, or
     can talk directly to a PANU host in a crossover cable fashion.

     A GN host forwards Ethernet packets to each of the connected PAN users as
     needed but does not provide access to any additional networks.

     The NAP service provides some of the features of an Ethernet bridge, with
     the NAP host forwarding Ethernet packets between each of the connected
     PAN users, and a different network media.

     Note, the only differences between NAP and GN services as implemented by
     btpand are in the SDP service record.  The bridging of packets by the NAP
     must be configured separately with brconfig(8).

     The options are as follows:

     -a address        In client mode, address of remote server.  May be given
                       as BDADDR or name, in which case btpand will attempt to
                       resolve the address via the bt_gethostbyname(3) call.

     -c path           In server mode, specify path to the sdpd(8) control
                       socket.  The default path is /var/run/sdp.

     -d device         Restrict connections to the local device.  May be given
                       as BDADDR or name, in which case btpand will attempt to
                       resolve the address via the bt_devaddr(3) call.  btpand
                       will set the tap(4) interface physical address to the
                       BDADDR of the Bluetooth radio.

     -i ifname         btpand uses the tap(4) driver to create a new network
                       interface for use.  Use this option to select a
                       specific tap(4) device interface which must already be

     -l limit          In server mode, limit the number of simultaneous
                       connections.  The default limit is 7 for NAP and GN
                       servers, and 1 for a PANU server.

     -m mode           Set L2CAP connection link mode.  Supported modes are:

                       auth    require devices to be paired.
                               auth, plus enable encryption.
                       secure  encryption, plus change of link key.

     -p psm            Use an alternative L2CAP Protocol/Service Multiplexer
                       (PSM) for server mode or client mode (when not using
                       Service Discovery).  The default PSM for BNEP is 15

     -s service        Name of service to provide or connect to, the following
                       services are recognised:

                       GN    Group ad-hoc Network.
                       NAP   Network Access Point.
                       PANU  Personal Area Networking User.

     -S service        As per -s except that btpand will not use SDP services
                       for connection setup.

     When providing networking services, the Bluetooth PAN profile says that
     the `Class of Device' property of the bluetooth controller SHALL include
     Networking capability (set bit 0x020000).  See btconfig(8) for details.

     After btpand has set up the client or server connection and opened the
     tap(4) interface, it will create a pid file and detach.


     The btpand utility exits 0 on success, and >0 if an error occurs.

           ifconfig tap1 create
           btpand -a host -d ubt0 -s NAP -m encrypt -i tap1
           dhcpcd -q -b tap1

     Will create an encrypted connection to the NAP on host, and link that to
     the tap1 interface.

           btpand -d ubt0 -s GN -m auth

     Will create a Group Network requiring authentication to join and register
     the GN service with the local SDP server.

     bluetooth(3), bluetooth(4), bridge(4), tap(4), brconfig(8), btconfig(8),
     dhcpcd(8), dhcpd(8), ifconfig(8), sdpd(8)

     The "Personal Area Networking Profile" and "Bluetooth Network
     Encapsulation Protocol" specifications are available at

     Iain Hibbert

     There is no way to supply alternative values for the SDP record.

     There is no way to set net type or multicast address filters.

     btpand does not do any address routing except to directly connected
     unicast addresses.  All other packets are multicast.

     As btpand uses the BDADDR of the Bluetooth radio as the physical address
     of the tap, only one instance can be run per radio.

     btpand can only provide a single service.

NetBSD 9.99                    January 17, 2019                    NetBSD 9.99