Received-SPF: pass (google.com: domain of linux-bluetooth-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Kai Ruhnau <kai.ruhnau@target-sg.com>
To:     "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>
Subject: The org.bluez.Network1 dbus interface does not emit PropertiesChanged
 signals on Disconnect 
Thread-Topic: The org.bluez.Network1 dbus interface does not emit
 PropertiesChanged signals on Disconnect 
Thread-Index: AdYnugzFNiPiZSWnT+CoKgkVhG0biQ==
Date:   Mon, 11 May 2020 17:33:05 +0000
Message-ID: <AM0PR02MB3841E4C1CCA1B6ED919DB3B5C5A10@AM0PR02MB3841.eurprd02.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: 946ee217-00cc-4075-8f57-08d7f5d15cf6
X-MS-Exchange-CrossTenant-originalarrivaltime: 11 May 2020 17:33:05.2007
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 52a4fe2f-f30a-452d-90b1-03ecc8ab0c0d
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: bxCGuhtUX3ya58Pg3tM4BeA+SUv/xrEYmGIPQoKvBzeyqNdSjQ22X9C7TxXaczCoRa8+1ty+wCIH+0lX0yoqb5bk56xFS4qZfyaa88peZpY=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR02MB4209
Sender: linux-bluetooth-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-bluetooth.vger.kernel.org>
X-Mailing-List: linux-bluetooth@vger.kernel.org

Hi,

I'm using the dbus interface to connect to an iPhone Personal Hotspot using
Bluez 5.54 / Linux 5.4.32. When connecting, Bluez emits PropertiesChanged=20
signals for the org.bluez.Network1 interface of the device informing me of
the Connected (true), Interface (bnep0) and UUID (00001116-...). However,
when disconnecting, no such signal is emitted. Querying the properties
shows, however, that the values reverted to the unconnected values.

When I disconnect by disabling the hotspot on the iPhone, the signal
is emitted.

To reproduce, run `busctl monitor org.bluez` on one console and issue

# busctl call org.bluez /org/bluez/hci0/dev_? org.bluez.Network1 Connect s =
00001116-0000-1000-8000-00805f9b34fb

resulting in
- method_call
- signal PropertiesChanged for org.bluez.Device1 (Connected true)
- method_return
- signal PropertiesChanged for org.bluez.Network1 (Connected true)

and then

# busctl call org.bluez /org/bluez/hci0/dev_? org.bluez.Network1 Disconnect

resulting in
- method_call
- method_return
- signal PropertiesChanged for org.bluez.Device1 (Connected false)

but no PropertiesChanged for org.bluez.Network1 (Connected false).

Thanks and Cheers,
Kai