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In-Reply-To: <CABBYNZK-L1_JEyr+CExiDYNkLF6TcT0HZrRN7QNngj9sns+OiQ@mail.gmail.com>
From:   Neil Benn <neil.benn@ziath.com>
Date:   Wed, 3 Oct 2018 16:28:27 +0100
Message-ID: <CADckva-05mb_=ZjhqVZthq5BOYF1aYuYjtD901Nh1gY39rghHw@mail.gmail.com>
Subject: Re: Registering a profile
To:     Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc:     Barry Byford <31baz66@gmail.com>, linux-bluetooth@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Sender: linux-bluetooth-owner@vger.kernel.org
Precedence: bulk

Hello,

  I understand that which is why I didn't prusue it.  My guess is that
the old code basically wasn't registering the profile so I guess that
the PSMs were not taken and it explains why I could directly connect
to the sockets via pyBluez - the issue here is that this was 'hacky'
and there was no way I could rebind to a paired device after losing
connection.

  I tried with SPP with the following main.conf:

Name = DataPaqWalk
DiscoverableTimeout = 0
PairableTimeout = 0
ReconnectAttempts=7
ReconnectIntervals=1,2,4,8,16,32,64
AutoEnable=true

  The code is now:

---
#!/usr/bin/python
#
# YAPTB Bluetooth keyboard emulator DBUS Service
#
# Adapted from
# www.linuxuser.co.uk/tutorials/emulate-bluetooth-keyboard-with-the-raspberry-pi
#
#

#from __future__ import absolute_import, print_function, unicode_literals
from __future__ import absolute_import, print_function

import os
import sys
import uuid
import dbus
import dbus.service
import dbus.mainloop.glib
import time
import bluetooth
import thread
import subprocess
import traceback
from bluetooth import *

from dbus.mainloop.glib import DBusGMainLoop

try:
  from gi.repository import GObject
except ImportError:
  import gobject as GObject

#
#define a bluez 5 profile object for our keyboard
#
class BTKbBluezProfile(dbus.service.Object):
    fd = -1

    @dbus.service.method("org.bluez.Profile1",
                                    in_signature="", out_signature="")
    def Release(self):
        print("Release")
        mainloop.quit()

    @dbus.service.method("org.bluez.Profile1",
                                    in_signature="", out_signature="")
    def Cancel(self):
        print("Cancel")

    @dbus.service.method("org.bluez.Profile1", in_signature="oha{sv}",
out_signature="")
    def NewConnection(self, path, fd, properties):
        print ('NewConnection')
        self.fd = fd.take()
        print("NewConnection(%s, %d)" % (path, self.fd))
        for key in properties.keys():
                print ('key ' + key + ' value ' + properties[key])
                if key == "Version" or key == "Features":
                        print("  %s = 0x%04x" % (key, properties[key]))
                else:
                        print("  %s = %s" % (key, properties[key]))


    @dbus.service.method("org.bluez.Profile1", in_signature="o",
out_signature="")
    def RequestDisconnection(self, path):
            print("RequestDisconnection(%s)" % (path))

            if (self.fd > 0):
                    os.close(self.fd)
                    self.fd = -1

    def __init__(self, bus, path):
            dbus.service.Object.__init__(self, bus, path)


#
#create a bluetooth device to emulate a HID keyboard,
# advertize a SDP record using our bluez profile class
#
class BTKbDevice():

    #define some constants
    P_CTRL =17  #Service port - must match port configured in SDP record
    P_INTR =19  #Interrrupt port - must match port configured in SDP record
    PROFILE_DBUS_PATH="/bluez/yaptb/btkb_profile" #dbus path of  the
bluez profile we will create
    UUID='00001101-0000-1000-8000-00805f9b34fb'
    #UUID="00001124-0000-1000-8000-00805f9b34fb"


    def __init__(self):

        print("Setting up BT device")
        self.init_bluez_profile()


    #set up a bluez profile to advertise device capabilities from a
loaded service record
    def init_bluez_profile(self):

        bus = dbus.SystemBus()

        print ("setting adapter to discoverable")
        self.adapter =
dbus.Interface(bus.get_object("org.bluez","/org/bluez"),
"org.bluez.Adapter1")
        self.adapter.Discoverable = True

        print("Configuring Bluez Profile")

        opts = {
            "Role":"server"
        }

        self.manager =
dbus.Interface(bus.get_object("org.bluez","/org/bluez"),
"org.bluez.ProfileManager1")
        self.profile = BTKbBluezProfile(bus,
BTKbDevice.PROFILE_DBUS_PATH)#BTKbDevice.PROFILE_DBUS_PATH)
        self.manager.RegisterProfile(BTKbDevice.PROFILE_DBUS_PATH,
BTKbDevice.UUID, opts)
        print("Profile registered ")

    #send a string to the bluetooth host machine
    def send_string(self,message):
         self.cinterrupt.send(message)


#define a dbus service that emulates a bluetooth keyboard
#this will enable different clients to connect to and use
#the service
class BTKbService(dbus.service.Object):

    def __init__(self):

        print("Setting up service")
        bus = dbus.SystemBus()
        #set up as a dbus service
        bus_name=dbus.service.BusName("org.yaptb.btkbservice",bus)
        dbus.service.Object.__init__(self,bus_name,"/org/yaptb/btkbservice")
        self.device= BTKbDevice();


    @dbus.service.method('org.yaptb.btkbservice', in_signature='yay')
    def send_keys(self,modifier_byte,keys):
        cmd_str=""
        cmd_str+=chr(0xA1)
        cmd_str+=chr(0x01)
        cmd_str+=chr(modifier_byte)
        cmd_str+=chr(0x00)

        count=0
        for key_code in keys:
            if(count<6):
                cmd_str+=chr(key_code)
            count+=1

        self.device.send_string(cmd_str);


#main routine
if __name__ == "__main__":
    mainloop = GObject.MainLoop()
    # we an only run as root
    if not os.geteuid() == 0:
       sys.exit("Only root can run this script")

    DBusGMainLoop(set_as_default=True)
    myservice = BTKbService();
    mainloop.run()
---

  This does the same as for an HID; no events are fired on the dbus;
bluetoothd gives:

bluetoothd[651]: src/adapter.c:connected_callback() hci0 device
C8:FF:28:79:05:D4 connected eir_len 5
bluetoothd[651]: src/adapter.c:new_link_key_callback() hci0 new key
for C8:FF:28:79:05:D4 type 4 pin_len 0 store_hint 1
bluetoothd[651]: src/device.c:device_set_bonded()
bluetoothd[651]: src/device.c:device_bonding_complete() bonding (nil)
status 0x00
bluetoothd[651]: src/adapter.c:resume_discovery()
bluetoothd[651]: src/adapter.c:dev_disconnected() Device
C8:FF:28:79:05:D4 disconnected, reason 3
bluetoothd[651]: src/adapter.c:adapter_remove_connection()
bluetoothd[651]: src/adapter.c:bonding_attempt_complete() hci0 bdaddr
C8:FF:28:79:05:D4 type 0 status 0xe
bluetoothd[651]: src/device.c:device_bonding_complete() bonding (nil)
status 0x0e
bluetoothd[651]: src/device.c:device_bonding_failed() status 14
bluetoothd[651]: src/adapter.c:resume_discovery()

  The device itself connects and disconnects after a second or so:

[bluetooth]# discoverable on
Changing discoverable on succeeded
[bluetooth]# power on
Changing power on succeeded
[CHG] Controller B8:27:EB:14:FB:B1 Powered: yes
[CHG] Device C8:FF:28:79:05:D4 Connected: yes
[CHG] Device C8:FF:28:79:05:D4 Connected: no
[bluetooth]#

  So I'm getting the same thing.  In the longer run I'll need HID
because I'm making a HID device; maybe as you say I can disable the
input plugin and connect the PSM but I'll still need to capture the
connected/disconnected events.  Sorry to keep posting; your help is
very much appreciated - as I said; I will return the code back when it
is working.  Any ideas?

  Thanks.

Cheers,

Neil
On Wed, 3 Oct 2018 at 15:04, Luiz Augusto von Dentz
<luiz.dentz@gmail.com> wrote:
>
> Hi Neil,
> On Wed, Oct 3, 2018 at 4:49 PM Neil Benn <neil.benn@ziath.com> wrote:
> >
> > Hello,
> >
> >   Thanks; I followed Barry's example on making the device discoverable
> > via bluetoothd and that can now be found so the profile is registered
> > without needing the sdp_record.  However the profile isn't getting
> > callbacks still except in one case where I kill the bluetoothd process
> > and the release method on the profile is called which is strange.
> >
> >   Looking at the output from dbus when a connection happens; we have
> > the following:
> >
> > signal time=1538574206.428425 sender=:1.0 -> destination=(null
> > destination) serial=314 path=/org/freedesktop/systemd1;
> > interface=org.freedesktop.systemd1.Manager; member=UnitNew
> >    string "sys-devices-platform-soc-20201000.serial-tty-ttyAMA0-hci0-hci0:11.device"
> >    object path "/org/freedesktop/systemd1/unit/sys_2ddevices_2dplatform_2dsoc_2d20201000_2eserial_2dtty_2dttyAMA0_2dhci0_2dhci0_3a11_2edevice"
> > signal time=1538574206.431862 sender=:1.0 -> destination=(null
> > destination) serial=315 path=/org/freedesktop/systemd1;
> > interface=org.freedesktop.systemd1.Manager; member=UnitNew
> >    string "sys-subsystem-bluetooth-devices-hci0:11.device"
> >    object path "/org/freedesktop/systemd1/unit/sys_2dsubsystem_2dbluetooth_2ddevices_2dhci0_3a11_2edevice"
> > signal time=1538574206.463318 sender=:1.22 -> destination=(null
> > destination) serial=17 path=/org/bluez/hci0/dev_C8_FF_28_79_05_D4;
> > interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
> >    string "org.bluez.Device1"
> >    array [
> >       dict entry(
> >          string "Connected"
> >          variant             boolean true
> >       )
> >    ]
> >    array [
> >    ]
> > signal time=1538574210.618465 sender=:1.22 -> destination=(null
> > destination) serial=18 path=/org/bluez/hci0/dev_C8_FF_28_79_05_D4;
> > interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
> >    string "org.bluez.Device1"
> >    array [
> >       dict entry(
> >          string "Connected"
> >          variant             boolean false
> >       )
> >    ]
> >    array [
> >    ]
> > signal time=1538574210.629705 sender=:1.0 -> destination=(null
> > destination) serial=316
> > path=/org/freedesktop/systemd1/unit/sys_2dsubsystem_2dbluetooth_2ddevices_2dhci0_3a11_2edevice;
> > interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
> >    string "org.freedesktop.systemd1.Device"
> >    array [
> >       dict entry(
> >          string "SysFSPath"
> >          variant             string
> > "/sys/devices/platform/soc/20201000.serial/tty/ttyAMA0/hci0/hci0:11"
> >       )
> >    ]
> >    array [
> >    ]
> > signal time=1538574210.640715 sender=:1.0 -> destination=(null
> > destination) serial=317
> > path=/org/freedesktop/systemd1/unit/sys_2dsubsystem_2dbluetooth_2ddevices_2dhci0_3a11_2edevice;
> > interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
> >    string "org.freedesktop.systemd1.Unit"
> >    array [
> >       dict entry(
> >          string "ActiveState"
> >          variant             string "inactive"
> >       )
> >       dict entry(
> >          string "SubState"
> >          variant             string "dead"
> >       )
> >       dict entry(
> >          string "StateChangeTimestamp"
> >          variant             uint64 1538574210626509
> >       )
> >       dict entry(
> >          string "StateChangeTimestampMonotonic"
> >          variant             uint64 2940864110
> >       )
> >       dict entry(
> >          string "InactiveExitTimestamp"
> >          variant             uint64 1538574206426852
> >       )
> >       dict entry(
> >          string "InactiveExitTimestampMonotonic"
> >          variant             uint64 2936664452
> >       )
> >       dict entry(
> >          string "ActiveEnterTimestamp"
> >          variant             uint64 1538574206426852
> >       )
> >       dict entry(
> >          string "ActiveEnterTimestampMonotonic"
> >          variant             uint64 2936664452
> >       )
> >       dict entry(
> >          string "ActiveExitTimestamp"
> >          variant             uint64 1538574210626509
> >       )
> >       dict entry(
> >          string "ActiveExitTimestampMonotonic"
> >          variant             uint64 2940864110
> >       )
> >       dict entry(
> >          string "InactiveEnterTimestamp"
> >          variant             uint64 1538574210626509
> >       )
> >       dict entry(
> >          string "InactiveEnterTimestampMonotonic"
> >          variant             uint64 2940864110
> >       )
> >       dict entry(
> >          string "Job"
> >          variant             struct {
> >                uint32 0
> >                object path "/"
> >             }
> >       )
> >       dict entry(
> >          string "ConditionResult"
> >          variant             boolean false
> >       )
> >       dict entry(
> >          string "AssertResult"
> >          variant             boolean false
> >       )
> >       dict entry(
> >          string "ConditionTimestamp"
> >          variant             uint64 0
> >       )
> >       dict entry(
> >          string "ConditionTimestampMonotonic"
> >          variant             uint64 0
> >       )
> >       dict entry(
> >          string "AssertTimestamp"
> >          variant             uint64 0
> >       )
> >       dict entry(
> >          string "AssertTimestampMonotonic"
> >          variant             uint64 0
> >       )
> >    ]
> >    array [
> >    ]
> > signal time=1538574210.668073 sender=:1.0 -> destination=(null
> > destination) serial=318 path=/org/freedesktop/systemd1;
> > interface=org.freedesktop.systemd1.Manager; member=UnitRemoved
> >    string "sys-subsystem-bluetooth-devices-hci0:11.device"
> >    object path "/org/freedesktop/systemd1/unit/sys_2dsubsystem_2dbluetooth_2ddevices_2dhci0_3a11_2edevice"
> > signal time=1538574210.670654 sender=:1.0 -> destination=(null
> > destination) serial=319
> > path=/org/freedesktop/systemd1/unit/sys_2ddevices_2dplatform_2dsoc_2d20201000_2eserial_2dtty_2dttyAMA0_2dhci0_2dhci0_3a11_2edevice;
> > interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
> >    string "org.freedesktop.systemd1.Device"
> >    array [
> >       dict entry(
> >          string "SysFSPath"
> >          variant             string
> > "/sys/devices/platform/soc/20201000.serial/tty/ttyAMA0/hci0/hci0:11"
> >       )
> >    ]
> >    array [
> >    ]
> > signal time=1538574210.677890 sender=:1.0 -> destination=(null
> > destination) serial=320
> > path=/org/freedesktop/systemd1/unit/sys_2ddevices_2dplatform_2dsoc_2d20201000_2eserial_2dtty_2dttyAMA0_2dhci0_2dhci0_3a11_2edevice;
> > interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
> >    string "org.freedesktop.systemd1.Unit"
> >    array [
> >       dict entry(
> >          string "ActiveState"
> >          variant             string "inactive"
> >       )
> >       dict entry(
> >          string "SubState"
> >          variant             string "dead"
> >       )
> >       dict entry(
> >          string "StateChangeTimestamp"
> >          variant             uint64 1538574210626572
> >       )
> >       dict entry(
> >          string "StateChangeTimestampMonotonic"
> >          variant             uint64 2940864171
> >       )
> >       dict entry(
> >          string "InactiveExitTimestamp"
> >          variant             uint64 1538574206426942
> >       )
> >       dict entry(
> >          string "InactiveExitTimestampMonotonic"
> >          variant             uint64 2936664542
> >       )
> >       dict entry(
> >          string "ActiveEnterTimestamp"
> >          variant             uint64 1538574206426942
> >       )
> >       dict entry(
> >          string "ActiveEnterTimestampMonotonic"
> >          variant             uint64 2936664542
> >       )
> >       dict entry(
> >          string "ActiveExitTimestamp"
> >          variant             uint64 1538574210626572
> >       )
> >       dict entry(
> >          string "ActiveExitTimestampMonotonic"
> >          variant             uint64 2940864171
> >       )
> >       dict entry(
> >          string "InactiveEnterTimestamp"
> >          variant             uint64 1538574210626572
> >       )
> >       dict entry(
> >          string "InactiveEnterTimestampMonotonic"
> >          variant             uint64 2940864171
> >       )
> >       dict entry(
> >          string "Job"
> >          variant             struct {
> >                uint32 0
> >                object path "/"
> >             }
> >       )
> >       dict entry(
> >          string "ConditionResult"
> >          variant             boolean false
> >       )
> >       dict entry(
> >          string "AssertResult"
> >          variant             boolean false
> >       )
> >       dict entry(
> >          string "ConditionTimestamp"
> >          variant             uint64 0
> >       )
> >       dict entry(
> >          string "ConditionTimestampMonotonic"
> >          variant             uint64 0
> >       )
> >       dict entry(
> >          string "AssertTimestamp"
> >          variant             uint64 0
> >       )
> >       dict entry(
> >          string "AssertTimestampMonotonic"
> >          variant             uint64 0
> >       )
> >    ]
> >    array [
> >    ]
> > signal time=1538574210.699336 sender=:1.0 -> destination=(null
> > destination) serial=321 path=/org/freedesktop/systemd1;
> > interface=org.freedesktop.systemd1.Manager; member=UnitRemoved
> >    string "sys-devices-platform-soc-20201000.serial-tty-ttyAMA0-hci0-hci0:11.device"
> >    object path "/org/freedesktop/systemd1/unit/sys_2ddevices_2dplatform_2dsoc_2d20201000_2eserial_2dtty_2dttyAMA0_2dhci0_2dhci0_3a11_2edevice"
> >
> >   So there are events being fired just not the ones that connect to my
> > registered profile.  In addition I've tried to register the profile
> > and listen for connections on the device PSM of 17 and 19 which HID
> > uses but nothing happens there either - though I'm not sure this is
> > the best way to communicate as it feels 'wrong' tbh.
>
> Have you read my responses? It _wont_ work for these PSMs, those are
> already taken by the daemon except if you are not loading the input
> plugin. Can't you try with something simpler like SPP, which is what
> this interface is for?
>
> >   Thanks again - I'm still basically not getting any events fired on
> > the profile except for Release which isn't really that useful as it
> > only notifies me if the bluetooth stack goes down!
> >
> >   Any ideas?
> >
> > Cheers,
> >
> > Neil
> > On Wed, 3 Oct 2018 at 11:35, Luiz Augusto von Dentz
> > <luiz.dentz@gmail.com> wrote:
> > >
> > > Hi Barry,
> > > On Tue, Oct 2, 2018 at 5:57 PM Barry Byford <31baz66@gmail.com> wrote:
> > > >
> > > > Hi Luiz,
> > > >
> > > > On Tue, 2 Oct 2018 at 13:48, Luiz Augusto von Dentz
> > > > <luiz.dentz@gmail.com> wrote:
> > > > >
> > > > > Hi Neil,
> > > > > On Tue, Oct 2, 2018 at 3:29 PM Neil Benn <neil.benn@ziath.com> wrote:
> > > > > >
> > > > > > Hello,
> > > > > >
> > > > > >   Thanks for that please see inline below:
> > > > > >
> > > > > >
> > > > > > On Tue, 2 Oct 2018, 12:28 Luiz Augusto von Dentz, <luiz.dentz@gmail.com> wrote:
> > > > > > >
> > > > > > > Hi Neil,
> > > > > > > On Tue, Oct 2, 2018 at 1:39 PM Neil Benn <neil.benn@ziath.com> wrote:
> > > > > > > >
> > > > > > > > Hello,
> > > > > > > >
> > > > > > > >   Thanks for that; I'll change the config file for this and for the
> > > > > > > > name can that be in the main.conf file?  The same for the
> > > > > > > > discoverable; set the timeout to zero - there is no security needed
> > > > > > > > for this device at all.  Can this all be done with the conf file?
> > > > > > > >
> > > > > > > >   On the connection; yes it connects.  This is a HID device connecting
> > > > > > > > via L2CAP with the interrupt on 19 and the control on 17 and the
> > > > > > > > windows PC correctly connects to the device, queries the service
> > > > > > > > record, identifies it as a HID and connects on both the control and
> > > > > > > > interrupt psm ports but none of the dbus methods are being called.  At
> > > > > > > > the moment I am using the pybluez library with the BluetoothSocket and
> > > > > > > > calling listen and accept which is a bit 'manual'.  To detect a
> > > > > > > > disconnect I'm calling hcitool con and parsing the response - which is
> > > > > > > > again a bit manual.  Please see below for my current 'hack':
> > > > > > >
> > > > > > > I don't think that will work since the input plugin is already
> > > > > > > listening in those PSM,
> > > > > >
> > > > > > It does connect and work but it doesn't register the profile.  If I
> > > > > > don't register the profile the default name in the config is used
> > > > > > >
> > > > > > > in fact I don't think RegisterProfile would
> > > > > > > parse the values from the record since you don't seem to be using the
> > > > > > > PSM:
> > > > > > >
> > > > > > > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/doc/profile-api.txt#n54
> > > > > >
> > > > > >
> > > > > > The PSM is defined in the service record
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Btw, why would you want to replace the HID profile? Is that not working?
> > > > > >
> > > > > > I'm using an sdp profile provided in some sample code I found, is
> > > > > > there a default one that is supported?  Is that default one selected
> > > > > > when I pick my uuid?
> > > > >
> > > > > You are not suppose to use existing UUIDs that the daemon already
> > > > > registers, the fact that you are able to register it without cause a
> > > > > problem might be a bug and we should probably check if the UUID is
> > > > > already registered and fail if it does.
> > > > >
> > > > > The HID profile is implementation is under profiles/input/, it
> > > > > actually hooks with kernel HID drivers.
> > > > >
> > > > > If you just want to test it you should probably have a look at
> > > > > test-profile in python:
> > > >
> > > > Do you have any example invocations of test-profile for common profiles?
> > >
> > > test-profile is just a sample, but yes we do have many instances of
> > > common profiles using RegisterProfile:
> > >
> > > OBEX Daemon:
> > > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/obexd/plugins/bluetooth.c#n256
> > >
> > > Ofono (HFP):
> > > https://git.kernel.org/pub/scm/network/ofono/ofono.git/tree/plugins/bluez5.c#n104
> > >
> > > PulseAudio (HSP):
> > > https://gitlab.freedesktop.org/pulseaudio/pulseaudio/blob/master/src/modules/bluetooth/backend-native.c#L332
> > >
> > > > It can be difficult to know where the issue is if you are not
> > > > confident with what settings should work.
> > >
> > > Well test-profile is not exactly a library just a convenient sample on
> > > how to use the interface, it was used mostly for testing SPP which is
> > > quite common way to register external profiles. HID is probably a no
> > > go due to reason already stated.
> > >
> > > > >
> > > > > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/test/test-profile
> > > > >
> > > > > >   If so then I think it has been overcomplicated by this sdp profile?
> > > > > > How do I use the default in-built profile - is it just the uuid?
> > > > > > On Tue, 2 Oct 2018 at 12:28, Luiz Augusto von Dentz
> > > > > > <luiz.dentz@gmail.com> wrote:
> > > > > > >
> > > > > > > Hi Neil,
> > > > > > > On Tue, Oct 2, 2018 at 1:39 PM Neil Benn <neil.benn@ziath.com> wrote:
> > > > > > > >
> > > > > > > > Hello,
> > > > > > > >
> > > > > > > >   Thanks for that; I'll change the config file for this and for the
> > > > > > > > name can that be in the main.conf file?  The same for the
> > > > > > > > discoverable; set the timeout to zero - there is no security needed
> > > > > > > > for this device at all.  Can this all be done with the conf file?
> > > > > > > >
> > > > > > > >   On the connection; yes it connects.  This is a HID device connecting
> > > > > > > > via L2CAP with the interrupt on 19 and the control on 17 and the
> > > > > > > > windows PC correctly connects to the device, queries the service
> > > > > > > > record, identifies it as a HID and connects on both the control and
> > > > > > > > interrupt psm ports but none of the dbus methods are being called.  At
> > > > > > > > the moment I am using the pybluez library with the BluetoothSocket and
> > > > > > > > calling listen and accept which is a bit 'manual'.  To detect a
> > > > > > > > disconnect I'm calling hcitool con and parsing the response - which is
> > > > > > > > again a bit manual.  Please see below for my current 'hack':
> > > > > > >
> > > > > > > I don't think that will work since the input plugin is already
> > > > > > > listening in those PSM, in fact I don't think RegisterProfile would
> > > > > > > parse the values from the record since you don't seem to be using the
> > > > > > > PSM:
> > > > > > >
> > > > > > > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/doc/profile-api.txt#n54
> > > > > > >
> > > > > > > Btw, why would you want to replace the HID profile? Is that not working?
> > > > > > >
> > > > > > > > ---
> > > > > > > >     #listen for incoming client connections
> > > > > > > >     #ideally this would be handled by the Bluez 5 profile
> > > > > > > >     #but that didn't seem to work
> > > > > > > >     def listen(self):
> > > > > > > >
> > > > > > > >         print("Waiting for connections")
> > > > > > > >         self.scontrol=BluetoothSocket(L2CAP)
> > > > > > > >         self.sinterrupt=BluetoothSocket(L2CAP)
> > > > > > > >
> > > > > > > >         self.scontrol.bind((self.MY_ADDRESS,self.P_CTRL))
> > > > > > > >         self.sinterrupt.bind((self.MY_ADDRESS,self.P_INTR ))
> > > > > > > >         #Start listening on the server sockets
> > > > > > > >         self.scontrol.listen(1) # Limit of 1 connection
> > > > > > > >         self.sinterrupt.listen(1)
> > > > > > > >
> > > > > > > >         self.ccontrol,cinfo = self.scontrol.accept()
> > > > > > > >         self.controlClientMac = cinfo[0]
> > > > > > > >         self.controlClientPsm = cinfo[1]
> > > > > > > >         print ('control is ' + self.controlClientMac + " " +
> > > > > > > > str(self.controlClientPsm))
> > > > > > > >
> > > > > > > >         self.cinterrupt, cinfo = self.sinterrupt.accept()
> > > > > > > >         self.interruptClientMac = cinfo[0]
> > > > > > > >         self.interruptClientPsm = cinfo[1]
> > > > > > > >         print ('interrupt is ' + self.interruptClientMac + " " +
> > > > > > > > str(self.interruptClientPsm))
> > > > > > > >
> > > > > > > >         thread.start_new_thread(self.check_connection, ())
> > > > > > > >
> > > > > > > >     def check_connection(self):
> > > > > > > >         halt = False
> > > > > > > >         while not halt:
> > > > > > > >             stdoutdata = subprocess.check_output(["hcitool", "con"])
> > > > > > > >
> > > > > > > >             if self.controlClientMac in stdoutdata.split():
> > > > > > > >                 time.sleep(0.1)
> > > > > > > >             else:
> > > > > > > >                 print('got disconnection')
> > > > > > > >                 self.scontrol.shutdown(2);
> > > > > > > >                 self.sinterrupt.shutdown(2)
> > > > > > > >                 halt = True
> > > > > > > >         thread.start_new_thread(self.listen, ())
> > > > > > > >
> > > > > > > >   Obviously this is a very clumsy way of doing it and calling back on
> > > > > > > > the profile is the correct way to do it, I just can't work out why the
> > > > > > > > profile is not being called.  I'm trying to spy on the dbus comms to
> > > > > > > > see if anything is being sent but I can't see any bluez profile
> > > > > > > > messages being sent at all.  Thanks for your response and any advice
> > > > > > > > is greatly appreciated.
> > > > > > > >
> > > > > > > > Cheers,
> > > > > > > >
> > > > > > > > Neil
> > > > > > > > On Tue, 2 Oct 2018 at 09:37, Luiz Augusto von Dentz
> > > > > > > > <luiz.dentz@gmail.com> wrote:
> > > > > > > > >
> > > > > > > > > Hi Neil,
> > > > > > > > > On Tue, Oct 2, 2018 at 1:32 AM Neil Benn <neil.benn@ziath.com> wrote:
> > > > > > > > > >
> > > > > > > > > > Hello,
> > > > > > > > > >
> > > > > > > > > >   I've been running a dbus-monitor and I can't see the interface being
> > > > > > > > > > called of 'org.bluez.Profile1' - I can see 'org.bluez.Device1' and
> > > > > > > > > > I've tried listening to that interface and also on the path with
> > > > > > > > > > dev_<ADAPTER-MAC> but I'm clearly doing something fundamentally wrong.
> > > > > > > > > > IF anyone has any advance I'd be very grateful and there is 100 rep
> > > > > > > > > > points up on Stack Overflow for any advice too!
> > > > > > > > > >
> > > > > > > > > >   Thanks; it's late here and I'll not be home till gone 1am so I'll be off now!
> > > > > > > > > >
> > > > > > > > > > Cheers,
> > > > > > > > > >
> > > > > > > > > > Neil
> > > > > > > > > > On Fri, 28 Sep 2018 at 23:38, Neil Benn <neil.benn@ziath.com> wrote:
> > > > > > > > > > >
> > > > > > > > > > > Hello,
> > > > > > > > > > >
> > > > > > > > > > >   I'm trying to setup a RPi0 operating a Bluetooth device; I've setup
> > > > > > > > > > > the device using the following call:
> > > > > > > > > > > ---
> > > > > > > > > > >     #configure the bluetooth hardware device
> > > > > > > > > > >     def init_bt_device(self):
> > > > > > > > > > >
> > > > > > > > > > >         print("Configuring for name " + BTKbDevice.MY_DEV_NAME)
> > > > > > > > > > >
> > > > > > > > > > >         #set the device class to a barcode scanner and set the name
> > > > > > > > > > >         os.system("hciconfig hcio class 0x002560")
> > > > > > > > > > >         os.system("hciconfig hcio name " + BTKbDevice.MY_DEV_NAME)
> > > > > > > > > > >
> > > > > > > > > > >         #make the device discoverable
> > > > > > > > > > >         os.system("hciconfig hcio piscan")
> > > > > > > > > > >
> > > > > > > > >
> > > > > > > > > You shouldn't be using hciconfig, instead do the following:
> > > > > > > > >
> > > > > > > > > The class is automatically set by bluetoothd based on the
> > > > > > > > > services/profiles registered and the setting in the main.conf:
> > > > > > > > >
> > > > > > > > > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/src/main.conf#n9
> > > > > > > > >
> > > > > > > > > For the name use D-Bus property Alias:
> > > > > > > > >
> > > > > > > > > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/doc/adapter-api.txt#n216
> > > > > > > > >
> > > > > > > > > To make the adapter discoverable use D-Bus property Discoverable:
> > > > > > > > >
> > > > > > > > > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/doc/adapter-api.txt#n252
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > > >   Then after that I attempt to setup the profile using the following code:
> > > > > > > > > > > ---
> > > > > > > > > > >     #set up a bluez profile to advertise device capabilities from a
> > > > > > > > > > > loaded service record
> > > > > > > > > > >     def init_bluez_profile(self):
> > > > > > > > > > >
> > > > > > > > > > >         print("Configuring Bluez Profile")
> > > > > > > > > > >
> > > > > > > > > > >         #setup profile options
> > > > > > > > > > >         service_record=self.read_sdp_service_record()
> > > > > > > > > > >
> > > > > > > > > > >         opts = {
> > > > > > > > > > >             "ServiceRecord":service_record,
> > > > > > > > > > >             "Role":"server",
> > > > > > > > > > >             "RequireAuthentication":False,
> > > > > > > > > > >             "RequireAuthorization":False,
> > > > > > > > > > >             "Name":BTKbDevice.MY_DEV_NAME,
> > > > > > > > > > >             "AutoConnect":True
> > > > > > > > > > >         }
> > > > > > > > > > >
> > > > > > > > > > >         #retrieve a proxy for the bluez profile interface
> > > > > > > > > > >         bus = dbus.SystemBus()
> > > > > > > > > > >         self.manager =
> > > > > > > > > > > dbus.Interface(bus.get_object("org.bluez","/org/bluez"),
> > > > > > > > > > > "org.bluez.ProfileManager1")
> > > > > > > > > > >         self.profile = BTKbBluezProfile(bus, BTKbDevice.PROFILE_DBUS_PATH)
> > > > > > > > > > >         self.manager.RegisterProfile(BTKbDevice.PROFILE_DBUS_PATH,
> > > > > > > > > > > BTKbDevice.UUID, opts)
> > > > > > > > > > >         print("Profile registered ")
> > > > > > > > > > > ---
> > > > > > > > > > >   The sdp record is available from https://textuploader.com/dv8xt.
> > > > > > > > > > > The profile in question is basically the same as the one defined in
> > > > > > > > > > > the test-profile as shown below:
> > > > > > > > > > > ---
> > > > > > > > > > > class BTKbBluezProfile(dbus.service.Object):
> > > > > > > > > > >     fd = -1
> > > > > > > > > > >
> > > > > > > > > > >     @dbus.service.method("org.bluez.Profile1",
> > > > > > > > > > >                                     in_signature="", out_signature="")
> > > > > > > > > > >     def Release(self):
> > > > > > > > > > >             print("Release")
> > > > > > > > > > >             mainloop.quit()
> > > > > > > > > > >
> > > > > > > > > > >     @dbus.service.method("org.bluez.Profile1",
> > > > > > > > > > >                                     in_signature="", out_signature="")
> > > > > > > > > > >     def Cancel(self):
> > > > > > > > > > >             print("Cancel")
> > > > > > > > > > >
> > > > > > > > > > >     @dbus.service.method("org.bluez.Profile1", in_signature="oha{sv}",
> > > > > > > > > > > out_signature="")
> > > > > > > > > > >     def NewConnection(self, path, fd, properties):
> > > > > > > > > > >             self.fd = fd.take()
> > > > > > > > > > >             print("NewConnection(%s, %d)" % (path, self.fd))
> > > > > > > > > > >             for key in properties.keys():
> > > > > > > > > > >                     print ('key ' + key + ' value ' + properties[key])
> > > > > > > > > > >                     if key == "Version" or key == "Features":
> > > > > > > > > > >                             print("  %s = 0x%04x" % (key, properties[key]))
> > > > > > > > > > >                     else:
> > > > > > > > > > >                             print("  %s = %s" % (key, properties[key]))
> > > > > > > > > > >
> > > > > > > > > > >     @dbus.service.method("org.bluez.Profile1", in_signature="o",
> > > > > > > > > > > out_signature="")
> > > > > > > > > > >     def RequestDisconnection(self, path):
> > > > > > > > > > >             print("RequestDisconnection(%s)" % (path))
> > > > > > > > > > >
> > > > > > > > > > >             if (self.fd > 0):
> > > > > > > > > > >                     os.close(self.fd)
> > > > > > > > > > >                     self.fd = -1
> > > > > > > > > > >
> > > > > > > > > > >     def __init__(self, bus, path):
> > > > > > > > > > >             dbus.service.Object.__init__(self, bus, path)
> > > > > > > > > > > ---
> > > > > > > > > > >   However it seems like the profile is not being registered, or least
> > > > > > > > > > > the methods in the profile are not being called.  I'm sorry to ask
> > > > > > > > > > > such a basic question but can someone please point me in the right
> > > > > > > > > > > direction as to why the profile is either not being registered or the
> > > > > > > > > > > callbacks on the profile are not being called.
> > > > > > > > >
> > > > > > > > > They would be called only when there is a connection to the profile,
> > > > > > > > > did you actually connect? If this is something like a serial port the
> > > > > > > > > remote should lookup the SDP record and connect to the channel listed
> > > > > > > > > there.
> > > > > > > > >
> > > > > > > > > > >   Thank you very much for reading this far and any and all help is
> > > > > > > > > > > most appreciated!
> > > > > > > > > > >
> > > > > > > > > > > Cheers,
> > > > > > > > > > >
> > > > > > > > > > > Neil
> > > > > > > > > > >
> > > > > > > > > > > --
> > > > > > > > > > >
> > > > > > > > > > > Neil Benn MSc
> > > > > > > > > > > Ziath Ltd
> > > > > > > > > > > Phone: +44 (0) 1223 855021
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> > > > > > > > > >
> > > > > > > > > > --
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> > > > > > > > > > Neil Benn MSc
> > > > > > > > > > Ziath Ltd
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> >
> >
> >
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