Merge pull request #452 from marshallpierce/mp/rust-0.2.0

Bumble crate 0.2.0

.github/workflows/code-check.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v3
       with:
-        python-version: '3.10'
+        python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/python-build-test.yml

@@ -47,7 +47,7 @@ jobs:
     strategy:
       matrix:
         python-version: [ "3.8", "3.9", "3.10", "3.11" ]
-        rust-version: [ "1.70.0", "stable" ]
+        rust-version: [ "1.76.0", "stable" ]
       fail-fast: false
     steps:
       - name: Check out from Git

.gitignore

@@ -9,4 +9,9 @@ __pycache__
 # generated by setuptools_scm
 bumble/_version.py
 .vscode/launch.json
+.vscode/settings.json
 /.idea
+venv/
+.venv/
+# snoop logs
+out/

.vscode/settings.json

@@ -12,7 +12,9 @@
         "ASHA",
         "asyncio",
         "ATRAC",
+        "avctp",
         "avdtp",
+        "avrcp",
         "bitpool",
         "bitstruct",
         "BSCP",
@@ -22,6 +24,7 @@
         "cmac",
         "CONNECTIONLESS",
         "csip",
+        "csis",
         "csrcs",
         "CVSD",
         "datagram",
@@ -32,6 +35,7 @@
         "dhkey",
         "diversifier",
         "endianness",
+        "ESCO",
         "Fitbit",
         "GATTLINK",
         "HANDSFREE",
@@ -70,6 +74,8 @@
         "substates",
         "tobytes",
         "tsep",
+        "UNMUTE",
+        "unmuted",
         "usbmodem",
         "vhci",
         "websockets",

apps/ble_rpa_tool.py

@@ -0,0 +1,63 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import click
+from bumble.colors import color
+from bumble.hci import Address
+from bumble.helpers import generate_irk, verify_rpa_with_irk
+
+
+@click.group()
+def cli():
+    '''
+    This is a tool for generating IRK, RPA,
+    and verifying IRK/RPA pairs
+    '''
+
+
+@click.command()
+def gen_irk() -> None:
+    print(generate_irk().hex())
+
+
+@click.command()
+@click.argument("irk", type=str)
+def gen_rpa(irk: str) -> None:
+    irk_bytes = bytes.fromhex(irk)
+    rpa = Address.generate_private_address(irk_bytes)
+    print(rpa.to_string(with_type_qualifier=False))
+
+
+@click.command()
+@click.argument("irk", type=str)
+@click.argument("rpa", type=str)
+def verify_rpa(irk: str, rpa: str) -> None:
+    address = Address(rpa)
+    irk_bytes = bytes.fromhex(irk)
+    if verify_rpa_with_irk(address, irk_bytes):
+        print(color("Verified", "green"))
+    else:
+        print(color("Not Verified", "red"))
+
+
+def main():
+    cli.add_command(gen_irk)
+    cli.add_command(gen_rpa)
+    cli.add_command(verify_rpa)
+    cli()
+
+
+# -----------------------------------------------------------------------------
+if __name__ == '__main__':
+    main()

apps/console.py

@@ -777,7 +777,7 @@ class ConsoleApp:
                 if not service:
                     continue
                 values = [
-                    attribute.read_value(connection)
+                    await attribute.read_value(connection)
                     for connection in self.device.connections.values()
                 ]
                 if not values:
@@ -796,11 +796,11 @@ class ConsoleApp:
                 if not characteristic:
                     continue
                 values = [
-                    attribute.read_value(connection)
+                    await attribute.read_value(connection)
                     for connection in self.device.connections.values()
                 ]
                 if not values:
-                    values = [attribute.read_value(None)]
+                    values = [await attribute.read_value(None)]
 
                 # TODO: future optimization: convert CCCD value to human readable string
 
@@ -944,7 +944,7 @@ class ConsoleApp:
 
         # send data to any subscribers
         if isinstance(attribute, Characteristic):
-            attribute.write_value(None, value)
+            await attribute.write_value(None, value)
             if attribute.has_properties(Characteristic.NOTIFY):
                 await self.device.gatt_server.notify_subscribers(attribute)
             if attribute.has_properties(Characteristic.INDICATE):

apps/controller_info.py

@@ -18,24 +18,30 @@
 import asyncio
 import os
 import logging
-import click
+import time
-from bumble.company_ids import COMPANY_IDENTIFIERS
 
+import click
+
+from bumble.company_ids import COMPANY_IDENTIFIERS
 from bumble.colors import color
 from bumble.core import name_or_number
 from bumble.hci import (
     map_null_terminated_utf8_string,
+    LeFeatureMask,
     HCI_SUCCESS,
-    HCI_LE_SUPPORTED_FEATURES_NAMES,
     HCI_VERSION_NAMES,
     LMP_VERSION_NAMES,
     HCI_Command,
     HCI_Command_Complete_Event,
     HCI_Command_Status_Event,
+    HCI_READ_BUFFER_SIZE_COMMAND,
+    HCI_Read_Buffer_Size_Command,
     HCI_READ_BD_ADDR_COMMAND,
     HCI_Read_BD_ADDR_Command,
     HCI_READ_LOCAL_NAME_COMMAND,
     HCI_Read_Local_Name_Command,
+    HCI_LE_READ_BUFFER_SIZE_COMMAND,
+    HCI_LE_Read_Buffer_Size_Command,
     HCI_LE_READ_MAXIMUM_DATA_LENGTH_COMMAND,
     HCI_LE_Read_Maximum_Data_Length_Command,
     HCI_LE_READ_NUMBER_OF_SUPPORTED_ADVERTISING_SETS_COMMAND,
@@ -44,6 +50,7 @@ from bumble.hci import (
     HCI_LE_Read_Maximum_Advertising_Data_Length_Command,
     HCI_LE_READ_SUGGESTED_DEFAULT_DATA_LENGTH_COMMAND,
     HCI_LE_Read_Suggested_Default_Data_Length_Command,
+    HCI_Read_Local_Version_Information_Command,
 )
 from bumble.host import Host
 from bumble.transport import open_transport_or_link
@@ -59,7 +66,7 @@ def command_succeeded(response):
 
 
 # -----------------------------------------------------------------------------
-async def get_classic_info(host):
+async def get_classic_info(host: Host) -> None:
     if host.supports_command(HCI_READ_BD_ADDR_COMMAND):
         response = await host.send_command(HCI_Read_BD_ADDR_Command())
         if command_succeeded(response):
@@ -80,7 +87,7 @@ async def get_classic_info(host):
 
 
 # -----------------------------------------------------------------------------
-async def get_le_info(host):
+async def get_le_info(host: Host) -> None:
     print()
 
     if host.supports_command(HCI_LE_READ_NUMBER_OF_SUPPORTED_ADVERTISING_SETS_COMMAND):
@@ -133,11 +140,36 @@ async def get_le_info(host):
 
     print(color('LE Features:', 'yellow'))
     for feature in host.supported_le_features:
-        print('  ', name_or_number(HCI_LE_SUPPORTED_FEATURES_NAMES, feature))
+        print(LeFeatureMask(feature).name)
 
 
 # -----------------------------------------------------------------------------
-async def async_main(transport):
+async def get_acl_flow_control_info(host: Host) -> None:
+    print()
+
+    if host.supports_command(HCI_READ_BUFFER_SIZE_COMMAND):
+        response = await host.send_command(
+            HCI_Read_Buffer_Size_Command(), check_result=True
+        )
+        print(
+            color('ACL Flow Control:', 'yellow'),
+            f'{response.return_parameters.hc_total_num_acl_data_packets} '
+            f'packets of size {response.return_parameters.hc_acl_data_packet_length}',
+        )
+
+    if host.supports_command(HCI_LE_READ_BUFFER_SIZE_COMMAND):
+        response = await host.send_command(
+            HCI_LE_Read_Buffer_Size_Command(), check_result=True
+        )
+        print(
+            color('LE ACL Flow Control:', 'yellow'),
+            f'{response.return_parameters.hc_total_num_le_acl_data_packets} '
+            f'packets of size {response.return_parameters.hc_le_acl_data_packet_length}',
+        )
+
+
+# -----------------------------------------------------------------------------
+async def async_main(latency_probes, transport):
     print('<<< connecting to HCI...')
     async with await open_transport_or_link(transport) as (hci_source, hci_sink):
         print('<<< connected')
@@ -145,6 +177,23 @@ async def async_main(transport):
         host = Host(hci_source, hci_sink)
         await host.reset()
 
+        # Measure the latency if requested
+        latencies = []
+        if latency_probes:
+            for _ in range(latency_probes):
+                start = time.time()
+                await host.send_command(HCI_Read_Local_Version_Information_Command())
+                latencies.append(1000 * (time.time() - start))
+            print(
+                color('HCI Command Latency:', 'yellow'),
+                (
+                    f'min={min(latencies):.2f}, '
+                    f'max={max(latencies):.2f}, '
+                    f'average={sum(latencies)/len(latencies):.2f}'
+                ),
+                '\n',
+            )
+
         # Print version
         print(color('Version:', 'yellow'))
         print(
@@ -168,6 +217,9 @@ async def async_main(transport):
         # Get the LE info
         await get_le_info(host)
 
+        # Print the ACL flow control info
+        await get_acl_flow_control_info(host)
+
         # Print the list of commands supported by the controller
         print()
         print(color('Supported Commands:', 'yellow'))
@@ -177,10 +229,16 @@ async def async_main(transport):
 
 # -----------------------------------------------------------------------------
 @click.command()
+@click.option(
+    '--latency-probes',
+    metavar='N',
+    type=int,
+    help='Send N commands to measure HCI transport latency statistics',
+)
 @click.argument('transport')
-def main(transport):
+def main(latency_probes, transport):
     logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'WARNING').upper())
-    asyncio.run(async_main(transport))
+    asyncio.run(async_main(latency_probes, transport))
 
 
 # -----------------------------------------------------------------------------

apps/controller_loopback.py

@@ -0,0 +1,205 @@
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import asyncio
+import logging
+import os
+import time
+from typing import Optional
+from bumble.colors import color
+from bumble.hci import (
+    HCI_READ_LOOPBACK_MODE_COMMAND,
+    HCI_Read_Loopback_Mode_Command,
+    HCI_WRITE_LOOPBACK_MODE_COMMAND,
+    HCI_Write_Loopback_Mode_Command,
+    LoopbackMode,
+)
+from bumble.host import Host
+from bumble.transport import open_transport_or_link
+import click
+
+
+class Loopback:
+    """Send and receive ACL data packets in local loopback mode"""
+
+    def __init__(self, packet_size: int, packet_count: int, transport: str):
+        self.transport = transport
+        self.packet_size = packet_size
+        self.packet_count = packet_count
+        self.connection_handle: Optional[int] = None
+        self.connection_event = asyncio.Event()
+        self.done = asyncio.Event()
+        self.expected_cid = 0
+        self.bytes_received = 0
+        self.start_timestamp = 0.0
+        self.last_timestamp = 0.0
+
+    def on_connection(self, connection_handle: int, *args):
+        """Retrieve connection handle from new connection event"""
+        if not self.connection_event.is_set():
+            # save first connection handle for ACL
+            # subsequent connections are SCO
+            self.connection_handle = connection_handle
+            self.connection_event.set()
+
+    def on_l2cap_pdu(self, connection_handle: int, cid: int, pdu: bytes):
+        """Calculate packet receive speed"""
+        now = time.time()
+        print(f'<<< Received packet {cid}: {len(pdu)} bytes')
+        assert connection_handle == self.connection_handle
+        assert cid == self.expected_cid
+        self.expected_cid += 1
+        if cid == 0:
+            self.start_timestamp = now
+        else:
+            elapsed_since_start = now - self.start_timestamp
+            elapsed_since_last = now - self.last_timestamp
+            self.bytes_received += len(pdu)
+            instant_rx_speed = len(pdu) / elapsed_since_last
+            average_rx_speed = self.bytes_received / elapsed_since_start
+            print(
+                color(
+                    f'@@@ RX speed: instant={instant_rx_speed:.4f},'
+                    f' average={average_rx_speed:.4f}',
+                    'cyan',
+                )
+            )
+
+        self.last_timestamp = now
+
+        if self.expected_cid == self.packet_count:
+            print(color('@@@ Received last packet', 'green'))
+            self.done.set()
+
+    async def run(self):
+        """Run a loopback throughput test"""
+        print(color('>>> Connecting to HCI...', 'green'))
+        async with await open_transport_or_link(self.transport) as (
+            hci_source,
+            hci_sink,
+        ):
+            print(color('>>> Connected', 'green'))
+
+            host = Host(hci_source, hci_sink)
+            await host.reset()
+
+            # make sure data can fit in one l2cap pdu
+            l2cap_header_size = 4
+
+            max_packet_size = (
+                host.acl_packet_queue
+                if host.acl_packet_queue
+                else host.le_acl_packet_queue
+            ).max_packet_size - l2cap_header_size
+            if self.packet_size > max_packet_size:
+                print(
+                    color(
+                        f'!!! Packet size ({self.packet_size}) larger than max supported'
+                        f' size ({max_packet_size})',
+                        'red',
+                    )
+                )
+                return
+
+            if not host.supports_command(
+                HCI_WRITE_LOOPBACK_MODE_COMMAND
+            ) or not host.supports_command(HCI_READ_LOOPBACK_MODE_COMMAND):
+                print(color('!!! Loopback mode not supported', 'red'))
+                return
+
+            # set event callbacks
+            host.on('connection', self.on_connection)
+            host.on('l2cap_pdu', self.on_l2cap_pdu)
+
+            loopback_mode = LoopbackMode.LOCAL
+
+            print(color('### Setting loopback mode', 'blue'))
+            await host.send_command(
+                HCI_Write_Loopback_Mode_Command(loopback_mode=LoopbackMode.LOCAL),
+                check_result=True,
+            )
+
+            print(color('### Checking loopback mode', 'blue'))
+            response = await host.send_command(
+                HCI_Read_Loopback_Mode_Command(), check_result=True
+            )
+            if response.return_parameters.loopback_mode != loopback_mode:
+                print(color('!!! Loopback mode mismatch', 'red'))
+                return
+
+            await self.connection_event.wait()
+            print(color('### Connected', 'cyan'))
+
+            print(color('=== Start sending', 'magenta'))
+            start_time = time.time()
+            bytes_sent = 0
+            for cid in range(0, self.packet_count):
+                # using the cid as an incremental index
+                host.send_l2cap_pdu(
+                    self.connection_handle, cid, bytes(self.packet_size)
+                )
+                print(
+                    color(
+                        f'>>> Sending packet {cid}: {self.packet_size} bytes', 'yellow'
+                    )
+                )
+                bytes_sent += self.packet_size  # don't count L2CAP or HCI header sizes
+                await asyncio.sleep(0)  # yield to allow packet receive
+
+            await self.done.wait()
+            print(color('=== Done!', 'magenta'))
+
+            elapsed = time.time() - start_time
+            average_tx_speed = bytes_sent / elapsed
+            print(
+                color(
+                    f'@@@ TX speed: average={average_tx_speed:.4f} ({bytes_sent} bytes'
+                    f' in {elapsed:.2f} seconds)',
+                    'green',
+                )
+            )
+
+
+# -----------------------------------------------------------------------------
+@click.command()
+@click.option(
+    '--packet-size',
+    '-s',
+    metavar='SIZE',
+    type=click.IntRange(8, 4096),
+    default=500,
+    help='Packet size',
+)
+@click.option(
+    '--packet-count',
+    '-c',
+    metavar='COUNT',
+    type=click.IntRange(1, 65535),
+    default=10,
+    help='Packet count',
+)
+@click.argument('transport')
+def main(packet_size, packet_count, transport):
+    logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'WARNING').upper())
+
+    loopback = Loopback(packet_size, packet_count, transport)
+    asyncio.run(loopback.run())
+
+
+# -----------------------------------------------------------------------------
+if __name__ == '__main__':
+    main()

apps/l2cap_bridge.py

@@ -49,14 +49,16 @@ class ServerBridge:
         self.tcp_port = tcp_port
 
     async def start(self, device: Device) -> None:
-        # Listen for incoming L2CAP CoC connections
+        # Listen for incoming L2CAP channel connections
         device.create_l2cap_server(
             spec=l2cap.LeCreditBasedChannelSpec(
                 psm=self.psm, mtu=self.mtu, mps=self.mps, max_credits=self.max_credits
             ),
-            handler=self.on_coc,
+            handler=self.on_channel,
+        )
+        print(
+            color(f'### Listening for channel connection on PSM {self.psm}', 'yellow')
         )
-        print(color(f'### Listening for CoC connection on PSM {self.psm}', 'yellow'))
 
         def on_ble_connection(connection):
             def on_ble_disconnection(reason):
@@ -73,7 +75,7 @@ class ServerBridge:
         await device.start_advertising(auto_restart=True)
 
     # Called when a new L2CAP connection is established
-    def on_coc(self, l2cap_channel):
+    def on_channel(self, l2cap_channel):
         print(color('*** L2CAP channel:', 'cyan'), l2cap_channel)
 
         class Pipe:
@@ -83,7 +85,7 @@ class ServerBridge:
                 self.l2cap_channel = l2cap_channel
 
                 l2cap_channel.on('close', self.on_l2cap_close)
-                l2cap_channel.sink = self.on_coc_sdu
+                l2cap_channel.sink = self.on_channel_sdu
 
             async def connect_to_tcp(self):
                 # Connect to the TCP server
@@ -128,7 +130,7 @@ class ServerBridge:
                 if self.tcp_transport is not None:
                     self.tcp_transport.close()
 
-            def on_coc_sdu(self, sdu):
+            def on_channel_sdu(self, sdu):
                 print(color(f'<<< [L2CAP SDU]: {len(sdu)} bytes', 'cyan'))
                 if self.tcp_transport is None:
                     print(color('!!! TCP socket not open, dropping', 'red'))
@@ -183,7 +185,7 @@ class ClientBridge:
             peer_name = writer.get_extra_info('peer_name')
             print(color(f'<<< TCP connection from {peer_name}', 'magenta'))
 
-            def on_coc_sdu(sdu):
+            def on_channel_sdu(sdu):
                 print(color(f'<<< [L2CAP SDU]: {len(sdu)} bytes', 'cyan'))
                 l2cap_to_tcp_pipe.write(sdu)
 
@@ -209,7 +211,7 @@ class ClientBridge:
                 writer.close()
                 return
 
-            l2cap_channel.sink = on_coc_sdu
+            l2cap_channel.sink = on_channel_sdu
             l2cap_channel.on('close', on_l2cap_close)
 
             # Start a flow control pipe from L2CAP to TCP
@@ -274,23 +276,29 @@ async def run(device_config, hci_transport, bridge):
 @click.pass_context
 @click.option('--device-config', help='Device configuration file', required=True)
 @click.option('--hci-transport', help='HCI transport', required=True)
-@click.option('--psm', help='PSM for L2CAP CoC', type=int, default=1234)
+@click.option('--psm', help='PSM for L2CAP', type=int, default=1234)
 @click.option(
-    '--l2cap-coc-max-credits',
+    '--l2cap-max-credits',
-    help='Maximum L2CAP CoC Credits',
+    help='Maximum L2CAP Credits',
     type=click.IntRange(1, 65535),
     default=128,
 )
 @click.option(
-    '--l2cap-coc-mtu',
+    '--l2cap-mtu',
-    help='L2CAP CoC MTU',
+    help='L2CAP MTU',
-    type=click.IntRange(23, 65535),
+    type=click.IntRange(
-    default=1022,
+        l2cap.L2CAP_LE_CREDIT_BASED_CONNECTION_MIN_MTU,
+        l2cap.L2CAP_LE_CREDIT_BASED_CONNECTION_MAX_MTU,
+    ),
+    default=1024,
 )
 @click.option(
-    '--l2cap-coc-mps',
+    '--l2cap-mps',
-    help='L2CAP CoC MPS',
+    help='L2CAP MPS',
-    type=click.IntRange(23, 65533),
+    type=click.IntRange(
+        l2cap.L2CAP_LE_CREDIT_BASED_CONNECTION_MIN_MPS,
+        l2cap.L2CAP_LE_CREDIT_BASED_CONNECTION_MAX_MPS,
+    ),
     default=1024,
 )
 def cli(
@@ -298,17 +306,17 @@ def cli(
     device_config,
     hci_transport,
     psm,
-    l2cap_coc_max_credits,
+    l2cap_max_credits,
-    l2cap_coc_mtu,
+    l2cap_mtu,
-    l2cap_coc_mps,
+    l2cap_mps,
 ):
     context.ensure_object(dict)
     context.obj['device_config'] = device_config
     context.obj['hci_transport'] = hci_transport
     context.obj['psm'] = psm
-    context.obj['max_credits'] = l2cap_coc_max_credits
+    context.obj['max_credits'] = l2cap_max_credits
-    context.obj['mtu'] = l2cap_coc_mtu
+    context.obj['mtu'] = l2cap_mtu
-    context.obj['mps'] = l2cap_coc_mps
+    context.obj['mps'] = l2cap_mps
 
 
 # -----------------------------------------------------------------------------

apps/pair.py

@@ -52,10 +52,12 @@ from bumble.att import (
 class Waiter:
     instance = None
 
-    def __init__(self):
+    def __init__(self, linger=False):
         self.done = asyncio.get_running_loop().create_future()
+        self.linger = linger
 
     def terminate(self):
+        if not self.linger:
             self.done.set_result(None)
 
     async def wait_until_terminated(self):
@@ -302,7 +304,7 @@ async def pair(
     hci_transport,
     address_or_name,
 ):
-    Waiter.instance = Waiter()
+    Waiter.instance = Waiter(linger=linger)
 
     print('<<< connecting to HCI...')
     async with await open_transport_or_link(hci_transport) as (hci_source, hci_sink):
@@ -396,7 +398,6 @@ async def pair(
                 address_or_name,
                 transport=BT_LE_TRANSPORT if mode == 'le' else BT_BR_EDR_TRANSPORT,
             )
-            pairing_failure = False
 
             if not request:
                 try:
@@ -405,11 +406,8 @@ async def pair(
                     else:
                         await connection.authenticate()
                 except ProtocolError as error:
-                    pairing_failure = True
                     print(color(f'Pairing failed: {error}', 'red'))
 
-            if not linger or pairing_failure:
-                return
         else:
             if mode == 'le':
                 # Advertise so that peers can find us and connect
@@ -459,7 +457,7 @@ class LogHandler(logging.Handler):
     help='Enable CTKD',
     show_default=True,
 )
-@click.option('--linger', default=True, is_flag=True, help='Linger after pairing')
+@click.option('--linger', default=False, is_flag=True, help='Linger after pairing')
 @click.option(
     '--io',
     type=click.Choice(

apps/scan.py

@@ -26,7 +26,7 @@ from bumble.transport import open_transport_or_link
 from bumble.keys import JsonKeyStore
 from bumble.smp import AddressResolver
 from bumble.device import Advertisement
-from bumble.hci import HCI_Constant, HCI_LE_1M_PHY, HCI_LE_CODED_PHY
+from bumble.hci import Address, HCI_Constant, HCI_LE_1M_PHY, HCI_LE_CODED_PHY
 
 
 # -----------------------------------------------------------------------------
@@ -66,10 +66,15 @@ class AdvertisementPrinter:
         address_type_string = ('PUBLIC', 'RANDOM', 'PUBLIC_ID', 'RANDOM_ID')[
             address.address_type
         ]
+        if address.address_type in (
+            Address.RANDOM_IDENTITY_ADDRESS,
+            Address.PUBLIC_IDENTITY_ADDRESS,
+        ):
+            type_color = 'yellow'
+        else:
             if address.is_public:
                 type_color = 'cyan'
-        else:
+            elif address.is_static:
-            if address.is_static:
                 type_color = 'green'
                 address_qualifier = '(static)'
             elif address.is_resolvable:
@@ -116,6 +121,7 @@ async def scan(
     phy,
     filter_duplicates,
     raw,
+    irks,
     keystore_file,
     device_config,
     transport,
@@ -140,9 +146,21 @@ async def scan(
 
         if device.keystore:
             resolving_keys = await device.keystore.get_resolving_keys()
-            resolver = AddressResolver(resolving_keys)
         else:
-            resolver = None
+            resolving_keys = []
+
+        for irk_and_address in irks:
+            if ':' not in irk_and_address:
+                raise ValueError('invalid IRK:ADDRESS value')
+            irk_hex, address_str = irk_and_address.split(':', 1)
+            resolving_keys.append(
+                (
+                    bytes.fromhex(irk_hex),
+                    Address(address_str, Address.RANDOM_DEVICE_ADDRESS),
+                )
+            )
+
+        resolver = AddressResolver(resolving_keys) if resolving_keys else None
 
         printer = AdvertisementPrinter(min_rssi, resolver)
         if raw:
@@ -187,8 +205,24 @@ async def scan(
     default=False,
     help='Listen for raw advertising reports instead of processed ones',
 )
-@click.option('--keystore-file', help='Keystore file to use when resolving addresses')
+@click.option(
-@click.option('--device-config', help='Device config file for the scanning device')
+    '--irk',
+    metavar='<IRK_HEX>:<ADDRESS>',
+    help=(
+        'Use this IRK for resolving private addresses ' '(may be used more than once)'
+    ),
+    multiple=True,
+)
+@click.option(
+    '--keystore-file',
+    metavar='FILE_PATH',
+    help='Keystore file to use when resolving addresses',
+)
+@click.option(
+    '--device-config',
+    metavar='FILE_PATH',
+    help='Device config file for the scanning device',
+)
 @click.argument('transport')
 def main(
     min_rssi,
@@ -198,6 +232,7 @@ def main(
     phy,
     filter_duplicates,
     raw,
+    irk,
     keystore_file,
     device_config,
     transport,
@@ -212,6 +247,7 @@ def main(
             phy,
             filter_duplicates,
             raw,
+            irk,
             keystore_file,
             device_config,
             transport,

apps/show.py

@@ -15,7 +15,11 @@
 # -----------------------------------------------------------------------------
 # Imports
 # -----------------------------------------------------------------------------
+import datetime
+import logging
+import os
 import struct
+
 import click
 
 from bumble.colors import color
@@ -24,6 +28,14 @@ from bumble.transport.common import PacketReader
 from bumble.helpers import PacketTracer
 
 
+# -----------------------------------------------------------------------------
+# Logging
+# -----------------------------------------------------------------------------
+logger = logging.getLogger(__name__)
+
+
+# -----------------------------------------------------------------------------
+# Classes
 # -----------------------------------------------------------------------------
 class SnoopPacketReader:
     '''
@@ -36,12 +48,18 @@ class SnoopPacketReader:
     DATALINK_BSCP = 1003
     DATALINK_H5 = 1004
 
+    IDENTIFICATION_PATTERN = b'btsnoop\0'
+    TIMESTAMP_ANCHOR = datetime.datetime(2000, 1, 1)
+    TIMESTAMP_DELTA = 0x00E03AB44A676000
+    ONE_MICROSECOND = datetime.timedelta(microseconds=1)
+
     def __init__(self, source):
         self.source = source
+        self.at_end = False
 
         # Read the header
         identification_pattern = source.read(8)
-        if identification_pattern.hex().lower() != '6274736e6f6f7000':
+        if identification_pattern != self.IDENTIFICATION_PATTERN:
             raise ValueError(
                 'not a valid snoop file, unexpected identification pattern'
             )
@@ -55,19 +73,32 @@ class SnoopPacketReader:
         # Read the record header
         header = self.source.read(24)
         if len(header) < 24:
-            return (0, None)
+            self.at_end = True
+            return (None, 0, None)
+
+        # Parse the header
         (
             original_length,
             included_length,
             packet_flags,
             _cumulative_drops,
-            _timestamp_seconds,
+            timestamp,
-            _timestamp_microsecond,
+        ) = struct.unpack('>IIIIQ', header)
-        ) = struct.unpack('>IIIIII', header)
 
-        # Abort on truncated packets
+        # Skip truncated packets
         if original_length != included_length:
-            return (0, None)
+            print(
+                color(
+                    f"!!! truncated packet ({included_length}/{original_length})", "red"
+                )
+            )
+            self.source.read(included_length)
+            return (None, 0, None)
+
+        # Convert the timestamp to a datetime object.
+        ts_dt = self.TIMESTAMP_ANCHOR + datetime.timedelta(
+            microseconds=timestamp - self.TIMESTAMP_DELTA
+        )
 
         if self.data_link_type == self.DATALINK_H1:
             # The packet is un-encapsulated, look at the flags to figure out its type
@@ -89,7 +120,17 @@ class SnoopPacketReader:
                 bytes([packet_type]) + self.source.read(included_length),
             )
 
-        return (packet_flags & 1, self.source.read(included_length))
+        return (ts_dt, packet_flags & 1, self.source.read(included_length))
+
+
+# -----------------------------------------------------------------------------
+class Printer:
+    def __init__(self):
+        self.index = 0
+
+    def print(self, message: str) -> None:
+        self.index += 1
+        print(f"[{self.index:8}]{message}")
 
 
 # -----------------------------------------------------------------------------
@@ -122,24 +163,28 @@ def main(format, vendors, filename):
         packet_reader = PacketReader(input)
 
         def read_next_packet():
-            return (0, packet_reader.next_packet())
+            return (None, 0, packet_reader.next_packet())
 
     else:
         packet_reader = SnoopPacketReader(input)
         read_next_packet = packet_reader.next_packet
 
-    tracer = PacketTracer(emit_message=print)
+    printer = Printer()
+    tracer = PacketTracer(emit_message=printer.print)
 
-    while True:
+    while not packet_reader.at_end:
         try:
-            (direction, packet) = read_next_packet()
+            (timestamp, direction, packet) = read_next_packet()
-            if packet is None:
+            if packet:
-                break
+                tracer.trace(hci.HCI_Packet.from_bytes(packet), direction, timestamp)
-            tracer.trace(hci.HCI_Packet.from_bytes(packet), direction)
+            else:
+                printer.print(color("[TRUNCATED]", "red"))
         except Exception as error:
+            logger.exception()
             print(color(f'!!! {error}', 'red'))
 
 
 # -----------------------------------------------------------------------------
 if __name__ == '__main__':
+    logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'WARNING').upper())
     main()  # pylint: disable=no-value-for-parameter

bumble/a2dp.py

@@ -182,11 +182,15 @@ def make_audio_source_service_sdp_records(service_record_handle, version=(1, 3))
         ),
         ServiceAttribute(
             SDP_BLUETOOTH_PROFILE_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+            DataElement.sequence(
+                [
                     DataElement.sequence(
                         [
                             DataElement.uuid(BT_ADVANCED_AUDIO_DISTRIBUTION_SERVICE),
                             DataElement.unsigned_integer_16(version_int),
                         ]
+                    )
+                ]
             ),
         ),
     ]
@@ -232,11 +236,15 @@ def make_audio_sink_service_sdp_records(service_record_handle, version=(1, 3)):
         ),
         ServiceAttribute(
             SDP_BLUETOOTH_PROFILE_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+            DataElement.sequence(
+                [
                     DataElement.sequence(
                         [
                             DataElement.uuid(BT_ADVANCED_AUDIO_DISTRIBUTION_SERVICE),
                             DataElement.unsigned_integer_16(version_int),
                         ]
+                    )
+                ]
             ),
         ),
     ]

bumble/att.py

@@ -25,9 +25,21 @@
 from __future__ import annotations
 import enum
 import functools
+import inspect
 import struct
+from typing import (
+    Any,
+    Awaitable,
+    Callable,
+    Dict,
+    List,
+    Optional,
+    Type,
+    Union,
+    TYPE_CHECKING,
+)
+
 from pyee import EventEmitter
-from typing import Dict, Type, List, Protocol, Union, Optional, Any, TYPE_CHECKING
 
 from bumble.core import UUID, name_or_number, ProtocolError
 from bumble.hci import HCI_Object, key_with_value
@@ -722,12 +734,38 @@ class ATT_Handle_Value_Confirmation(ATT_PDU):
 
 
 # -----------------------------------------------------------------------------
-class ConnectionValue(Protocol):
+class AttributeValue:
-    def read(self, connection) -> bytes:
+    '''
-        ...
+    Attribute value where reading and/or writing is delegated to functions
+    passed as arguments to the constructor.
+    '''
 
-    def write(self, connection, value: bytes) -> None:
+    def __init__(
-        ...
+        self,
+        read: Union[
+            Callable[[Optional[Connection]], bytes],
+            Callable[[Optional[Connection]], Awaitable[bytes]],
+            None,
+        ] = None,
+        write: Union[
+            Callable[[Optional[Connection], bytes], None],
+            Callable[[Optional[Connection], bytes], Awaitable[None]],
+            None,
+        ] = None,
+    ):
+        self._read = read
+        self._write = write
+
+    def read(self, connection: Optional[Connection]) -> Union[bytes, Awaitable[bytes]]:
+        return self._read(connection) if self._read else b''
+
+    def write(
+        self, connection: Optional[Connection], value: bytes
+    ) -> Union[Awaitable[None], None]:
+        if self._write:
+            return self._write(connection, value)
+
+        return None
 
 
 # -----------------------------------------------------------------------------
@@ -770,13 +808,13 @@ class Attribute(EventEmitter):
     READ_REQUIRES_AUTHORIZATION = Permissions.READ_REQUIRES_AUTHORIZATION
     WRITE_REQUIRES_AUTHORIZATION = Permissions.WRITE_REQUIRES_AUTHORIZATION
 
-    value: Union[str, bytes, ConnectionValue]
+    value: Union[bytes, AttributeValue]
 
     def __init__(
         self,
         attribute_type: Union[str, bytes, UUID],
         permissions: Union[str, Attribute.Permissions],
-        value: Union[str, bytes, ConnectionValue] = b'',
+        value: Union[str, bytes, AttributeValue] = b'',
     ) -> None:
         EventEmitter.__init__(self)
         self.handle = 0
@@ -806,7 +844,7 @@ class Attribute(EventEmitter):
     def decode_value(self, value_bytes: bytes) -> Any:
         return value_bytes
 
-    def read_value(self, connection: Optional[Connection]) -> bytes:
+    async def read_value(self, connection: Optional[Connection]) -> bytes:
         if (
             (self.permissions & self.READ_REQUIRES_ENCRYPTION)
             and connection is not None
@@ -832,6 +870,8 @@ class Attribute(EventEmitter):
         if hasattr(self.value, 'read'):
             try:
                 value = self.value.read(connection)
+                if inspect.isawaitable(value):
+                    value = await value
             except ATT_Error as error:
                 raise ATT_Error(
                     error_code=error.error_code, att_handle=self.handle
@@ -841,7 +881,7 @@ class Attribute(EventEmitter):
 
         return self.encode_value(value)
 
-    def write_value(self, connection: Connection, value_bytes: bytes) -> None:
+    async def write_value(self, connection: Connection, value_bytes: bytes) -> None:
         if (
             self.permissions & self.WRITE_REQUIRES_ENCRYPTION
         ) and not connection.encryption:
@@ -864,7 +904,9 @@ class Attribute(EventEmitter):
 
         if hasattr(self.value, 'write'):
             try:
-                self.value.write(connection, value)  # pylint: disable=not-callable
+                result = self.value.write(connection, value)
+                if inspect.isawaitable(result):
+                    await result
             except ATT_Error as error:
                 raise ATT_Error(
                     error_code=error.error_code, att_handle=self.handle

bumble/avc.py

@@ -0,0 +1,520 @@
+# Copyright 2021-2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+from __future__ import annotations
+import enum
+import struct
+from typing import Dict, Type, Union, Tuple
+
+from bumble.utils import OpenIntEnum
+
+
+# -----------------------------------------------------------------------------
+class Frame:
+    class SubunitType(enum.IntEnum):
+        # AV/C Digital Interface Command Set General Specification Version 4.1
+        # Table 7.4
+        MONITOR = 0x00
+        AUDIO = 0x01
+        PRINTER = 0x02
+        DISC = 0x03
+        TAPE_RECORDER_OR_PLAYER = 0x04
+        TUNER = 0x05
+        CA = 0x06
+        CAMERA = 0x07
+        PANEL = 0x09
+        BULLETIN_BOARD = 0x0A
+        VENDOR_UNIQUE = 0x1C
+        EXTENDED = 0x1E
+        UNIT = 0x1F
+
+    class OperationCode(OpenIntEnum):
+        # 0x00 - 0x0F: Unit and subunit commands
+        VENDOR_DEPENDENT = 0x00
+        RESERVE = 0x01
+        PLUG_INFO = 0x02
+
+        # 0x10 - 0x3F: Unit commands
+        DIGITAL_OUTPUT = 0x10
+        DIGITAL_INPUT = 0x11
+        CHANNEL_USAGE = 0x12
+        OUTPUT_PLUG_SIGNAL_FORMAT = 0x18
+        INPUT_PLUG_SIGNAL_FORMAT = 0x19
+        GENERAL_BUS_SETUP = 0x1F
+        CONNECT_AV = 0x20
+        DISCONNECT_AV = 0x21
+        CONNECTIONS = 0x22
+        CONNECT = 0x24
+        DISCONNECT = 0x25
+        UNIT_INFO = 0x30
+        SUBUNIT_INFO = 0x31
+
+        # 0x40 - 0x7F: Subunit commands
+        PASS_THROUGH = 0x7C
+        GUI_UPDATE = 0x7D
+        PUSH_GUI_DATA = 0x7E
+        USER_ACTION = 0x7F
+
+        # 0xA0 - 0xBF: Unit and subunit commands
+        VERSION = 0xB0
+        POWER = 0xB2
+
+    subunit_type: SubunitType
+    subunit_id: int
+    opcode: OperationCode
+    operands: bytes
+
+    @staticmethod
+    def subclass(subclass):
+        # Infer the opcode from the class name
+        if subclass.__name__.endswith("CommandFrame"):
+            short_name = subclass.__name__.replace("CommandFrame", "")
+            category_class = CommandFrame
+        elif subclass.__name__.endswith("ResponseFrame"):
+            short_name = subclass.__name__.replace("ResponseFrame", "")
+            category_class = ResponseFrame
+        else:
+            raise ValueError(f"invalid subclass name {subclass.__name__}")
+
+        uppercase_indexes = [
+            i for i in range(len(short_name)) if short_name[i].isupper()
+        ]
+        uppercase_indexes.append(len(short_name))
+        words = [
+            short_name[uppercase_indexes[i] : uppercase_indexes[i + 1]].upper()
+            for i in range(len(uppercase_indexes) - 1)
+        ]
+        opcode_name = "_".join(words)
+        opcode = Frame.OperationCode[opcode_name]
+        category_class.subclasses[opcode] = subclass
+        return subclass
+
+    @staticmethod
+    def from_bytes(data: bytes) -> Frame:
+        if data[0] >> 4 != 0:
+            raise ValueError("first 4 bits must be 0s")
+
+        ctype_or_response = data[0] & 0xF
+        subunit_type = Frame.SubunitType(data[1] >> 3)
+        subunit_id = data[1] & 7
+
+        if subunit_type == Frame.SubunitType.EXTENDED:
+            # Not supported
+            raise NotImplementedError("extended subunit types not supported")
+
+        if subunit_id < 5:
+            opcode_offset = 2
+        elif subunit_id == 5:
+            # Extended to the next byte
+            extension = data[2]
+            if extension == 0:
+                raise ValueError("extended subunit ID value reserved")
+            if extension == 0xFF:
+                subunit_id = 5 + 254 + data[3]
+                opcode_offset = 4
+            else:
+                subunit_id = 5 + extension
+                opcode_offset = 3
+
+        elif subunit_id == 6:
+            raise ValueError("reserved subunit ID")
+
+        opcode = Frame.OperationCode(data[opcode_offset])
+        operands = data[opcode_offset + 1 :]
+
+        # Look for a registered subclass
+        if ctype_or_response < 8:
+            # Command
+            ctype = CommandFrame.CommandType(ctype_or_response)
+            if c_subclass := CommandFrame.subclasses.get(opcode):
+                return c_subclass(
+                    ctype,
+                    subunit_type,
+                    subunit_id,
+                    *c_subclass.parse_operands(operands),
+                )
+            return CommandFrame(ctype, subunit_type, subunit_id, opcode, operands)
+        else:
+            # Response
+            response = ResponseFrame.ResponseCode(ctype_or_response)
+            if r_subclass := ResponseFrame.subclasses.get(opcode):
+                return r_subclass(
+                    response,
+                    subunit_type,
+                    subunit_id,
+                    *r_subclass.parse_operands(operands),
+                )
+            return ResponseFrame(response, subunit_type, subunit_id, opcode, operands)
+
+    def to_bytes(
+        self,
+        ctype_or_response: Union[CommandFrame.CommandType, ResponseFrame.ResponseCode],
+    ) -> bytes:
+        # TODO: support extended subunit types and ids.
+        return (
+            bytes(
+                [
+                    ctype_or_response,
+                    self.subunit_type << 3 | self.subunit_id,
+                    self.opcode,
+                ]
+            )
+            + self.operands
+        )
+
+    def to_string(self, extra: str) -> str:
+        return (
+            f"{self.__class__.__name__}({extra}"
+            f"subunit_type={self.subunit_type.name}, "
+            f"subunit_id=0x{self.subunit_id:02X}, "
+            f"opcode={self.opcode.name}, "
+            f"operands={self.operands.hex()})"
+        )
+
+    def __init__(
+        self,
+        subunit_type: SubunitType,
+        subunit_id: int,
+        opcode: OperationCode,
+        operands: bytes,
+    ) -> None:
+        self.subunit_type = subunit_type
+        self.subunit_id = subunit_id
+        self.opcode = opcode
+        self.operands = operands
+
+
+# -----------------------------------------------------------------------------
+class CommandFrame(Frame):
+    class CommandType(OpenIntEnum):
+        # AV/C Digital Interface Command Set General Specification Version 4.1
+        # Table 7.1
+        CONTROL = 0x00
+        STATUS = 0x01
+        SPECIFIC_INQUIRY = 0x02
+        NOTIFY = 0x03
+        GENERAL_INQUIRY = 0x04
+
+    subclasses: Dict[Frame.OperationCode, Type[CommandFrame]] = {}
+    ctype: CommandType
+
+    @staticmethod
+    def parse_operands(operands: bytes) -> Tuple:
+        raise NotImplementedError
+
+    def __init__(
+        self,
+        ctype: CommandType,
+        subunit_type: Frame.SubunitType,
+        subunit_id: int,
+        opcode: Frame.OperationCode,
+        operands: bytes,
+    ) -> None:
+        super().__init__(subunit_type, subunit_id, opcode, operands)
+        self.ctype = ctype
+
+    def __bytes__(self):
+        return self.to_bytes(self.ctype)
+
+    def __str__(self):
+        return self.to_string(f"ctype={self.ctype.name}, ")
+
+
+# -----------------------------------------------------------------------------
+class ResponseFrame(Frame):
+    class ResponseCode(OpenIntEnum):
+        # AV/C Digital Interface Command Set General Specification Version 4.1
+        # Table 7.2
+        NOT_IMPLEMENTED = 0x08
+        ACCEPTED = 0x09
+        REJECTED = 0x0A
+        IN_TRANSITION = 0x0B
+        IMPLEMENTED_OR_STABLE = 0x0C
+        CHANGED = 0x0D
+        INTERIM = 0x0F
+
+    subclasses: Dict[Frame.OperationCode, Type[ResponseFrame]] = {}
+    response: ResponseCode
+
+    @staticmethod
+    def parse_operands(operands: bytes) -> Tuple:
+        raise NotImplementedError
+
+    def __init__(
+        self,
+        response: ResponseCode,
+        subunit_type: Frame.SubunitType,
+        subunit_id: int,
+        opcode: Frame.OperationCode,
+        operands: bytes,
+    ) -> None:
+        super().__init__(subunit_type, subunit_id, opcode, operands)
+        self.response = response
+
+    def __bytes__(self):
+        return self.to_bytes(self.response)
+
+    def __str__(self):
+        return self.to_string(f"response={self.response.name}, ")
+
+
+# -----------------------------------------------------------------------------
+class VendorDependentFrame:
+    company_id: int
+    vendor_dependent_data: bytes
+
+    @staticmethod
+    def parse_operands(operands: bytes) -> Tuple:
+        return (
+            struct.unpack(">I", b"\x00" + operands[:3])[0],
+            operands[3:],
+        )
+
+    def make_operands(self) -> bytes:
+        return struct.pack(">I", self.company_id)[1:] + self.vendor_dependent_data
+
+    def __init__(self, company_id: int, vendor_dependent_data: bytes):
+        self.company_id = company_id
+        self.vendor_dependent_data = vendor_dependent_data
+
+
+# -----------------------------------------------------------------------------
+@Frame.subclass
+class VendorDependentCommandFrame(VendorDependentFrame, CommandFrame):
+    def __init__(
+        self,
+        ctype: CommandFrame.CommandType,
+        subunit_type: Frame.SubunitType,
+        subunit_id: int,
+        company_id: int,
+        vendor_dependent_data: bytes,
+    ) -> None:
+        VendorDependentFrame.__init__(self, company_id, vendor_dependent_data)
+        CommandFrame.__init__(
+            self,
+            ctype,
+            subunit_type,
+            subunit_id,
+            Frame.OperationCode.VENDOR_DEPENDENT,
+            self.make_operands(),
+        )
+
+    def __str__(self):
+        return (
+            f"VendorDependentCommandFrame(ctype={self.ctype.name}, "
+            f"subunit_type={self.subunit_type.name}, "
+            f"subunit_id=0x{self.subunit_id:02X}, "
+            f"company_id=0x{self.company_id:06X}, "
+            f"vendor_dependent_data={self.vendor_dependent_data.hex()})"
+        )
+
+
+# -----------------------------------------------------------------------------
+@Frame.subclass
+class VendorDependentResponseFrame(VendorDependentFrame, ResponseFrame):
+    def __init__(
+        self,
+        response: ResponseFrame.ResponseCode,
+        subunit_type: Frame.SubunitType,
+        subunit_id: int,
+        company_id: int,
+        vendor_dependent_data: bytes,
+    ) -> None:
+        VendorDependentFrame.__init__(self, company_id, vendor_dependent_data)
+        ResponseFrame.__init__(
+            self,
+            response,
+            subunit_type,
+            subunit_id,
+            Frame.OperationCode.VENDOR_DEPENDENT,
+            self.make_operands(),
+        )
+
+    def __str__(self):
+        return (
+            f"VendorDependentResponseFrame(response={self.response.name}, "
+            f"subunit_type={self.subunit_type.name}, "
+            f"subunit_id=0x{self.subunit_id:02X}, "
+            f"company_id=0x{self.company_id:06X}, "
+            f"vendor_dependent_data={self.vendor_dependent_data.hex()})"
+        )
+
+
+# -----------------------------------------------------------------------------
+class PassThroughFrame:
+    """
+    See AV/C Panel Subunit Specification 1.1 - 9.4 PASS THROUGH control command
+    """
+
+    class StateFlag(enum.IntEnum):
+        PRESSED = 0
+        RELEASED = 1
+
+    class OperationId(OpenIntEnum):
+        SELECT = 0x00
+        UP = 0x01
+        DOWN = 0x01
+        LEFT = 0x03
+        RIGHT = 0x04
+        RIGHT_UP = 0x05
+        RIGHT_DOWN = 0x06
+        LEFT_UP = 0x07
+        LEFT_DOWN = 0x08
+        ROOT_MENU = 0x09
+        SETUP_MENU = 0x0A
+        CONTENTS_MENU = 0x0B
+        FAVORITE_MENU = 0x0C
+        EXIT = 0x0D
+        NUMBER_0 = 0x20
+        NUMBER_1 = 0x21
+        NUMBER_2 = 0x22
+        NUMBER_3 = 0x23
+        NUMBER_4 = 0x24
+        NUMBER_5 = 0x25
+        NUMBER_6 = 0x26
+        NUMBER_7 = 0x27
+        NUMBER_8 = 0x28
+        NUMBER_9 = 0x29
+        DOT = 0x2A
+        ENTER = 0x2B
+        CLEAR = 0x2C
+        CHANNEL_UP = 0x30
+        CHANNEL_DOWN = 0x31
+        PREVIOUS_CHANNEL = 0x32
+        SOUND_SELECT = 0x33
+        INPUT_SELECT = 0x34
+        DISPLAY_INFORMATION = 0x35
+        HELP = 0x36
+        PAGE_UP = 0x37
+        PAGE_DOWN = 0x38
+        POWER = 0x40
+        VOLUME_UP = 0x41
+        VOLUME_DOWN = 0x42
+        MUTE = 0x43
+        PLAY = 0x44
+        STOP = 0x45
+        PAUSE = 0x46
+        RECORD = 0x47
+        REWIND = 0x48
+        FAST_FORWARD = 0x49
+        EJECT = 0x4A
+        FORWARD = 0x4B
+        BACKWARD = 0x4C
+        ANGLE = 0x50
+        SUBPICTURE = 0x51
+        F1 = 0x71
+        F2 = 0x72
+        F3 = 0x73
+        F4 = 0x74
+        F5 = 0x75
+        VENDOR_UNIQUE = 0x7E
+
+    state_flag: StateFlag
+    operation_id: OperationId
+    operation_data: bytes
+
+    @staticmethod
+    def parse_operands(operands: bytes) -> Tuple:
+        return (
+            PassThroughFrame.StateFlag(operands[0] >> 7),
+            PassThroughFrame.OperationId(operands[0] & 0x7F),
+            operands[1 : 1 + operands[1]],
+        )
+
+    def make_operands(self):
+        return (
+            bytes([self.state_flag << 7 | self.operation_id, len(self.operation_data)])
+            + self.operation_data
+        )
+
+    def __init__(
+        self,
+        state_flag: StateFlag,
+        operation_id: OperationId,
+        operation_data: bytes,
+    ) -> None:
+        if len(operation_data) > 255:
+            raise ValueError("operation data must be <= 255 bytes")
+        self.state_flag = state_flag
+        self.operation_id = operation_id
+        self.operation_data = operation_data
+
+
+# -----------------------------------------------------------------------------
+@Frame.subclass
+class PassThroughCommandFrame(PassThroughFrame, CommandFrame):
+    def __init__(
+        self,
+        ctype: CommandFrame.CommandType,
+        subunit_type: Frame.SubunitType,
+        subunit_id: int,
+        state_flag: PassThroughFrame.StateFlag,
+        operation_id: PassThroughFrame.OperationId,
+        operation_data: bytes,
+    ) -> None:
+        PassThroughFrame.__init__(self, state_flag, operation_id, operation_data)
+        CommandFrame.__init__(
+            self,
+            ctype,
+            subunit_type,
+            subunit_id,
+            Frame.OperationCode.PASS_THROUGH,
+            self.make_operands(),
+        )
+
+    def __str__(self):
+        return (
+            f"PassThroughCommandFrame(ctype={self.ctype.name}, "
+            f"subunit_type={self.subunit_type.name}, "
+            f"subunit_id=0x{self.subunit_id:02X}, "
+            f"state_flag={self.state_flag.name}, "
+            f"operation_id={self.operation_id.name}, "
+            f"operation_data={self.operation_data.hex()})"
+        )
+
+
+# -----------------------------------------------------------------------------
+@Frame.subclass
+class PassThroughResponseFrame(PassThroughFrame, ResponseFrame):
+    def __init__(
+        self,
+        response: ResponseFrame.ResponseCode,
+        subunit_type: Frame.SubunitType,
+        subunit_id: int,
+        state_flag: PassThroughFrame.StateFlag,
+        operation_id: PassThroughFrame.OperationId,
+        operation_data: bytes,
+    ) -> None:
+        PassThroughFrame.__init__(self, state_flag, operation_id, operation_data)
+        ResponseFrame.__init__(
+            self,
+            response,
+            subunit_type,
+            subunit_id,
+            Frame.OperationCode.PASS_THROUGH,
+            self.make_operands(),
+        )
+
+    def __str__(self):
+        return (
+            f"PassThroughResponseFrame(response={self.response.name}, "
+            f"subunit_type={self.subunit_type.name}, "
+            f"subunit_id=0x{self.subunit_id:02X}, "
+            f"state_flag={self.state_flag.name}, "
+            f"operation_id={self.operation_id.name}, "
+            f"operation_data={self.operation_data.hex()})"
+        )

bumble/avctp.py

@@ -0,0 +1,291 @@
+# Copyright 2021-2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+from __future__ import annotations
+from enum import IntEnum
+import logging
+import struct
+from typing import Callable, cast, Dict, Optional
+
+from bumble.colors import color
+from bumble import avc
+from bumble import l2cap
+
+# -----------------------------------------------------------------------------
+# Logging
+# -----------------------------------------------------------------------------
+logger = logging.getLogger(__name__)
+
+
+# -----------------------------------------------------------------------------
+# Constants
+# -----------------------------------------------------------------------------
+AVCTP_PSM = 0x0017
+AVCTP_BROWSING_PSM = 0x001B
+
+
+# -----------------------------------------------------------------------------
+class MessageAssembler:
+    Callback = Callable[[int, bool, bool, int, bytes], None]
+
+    transaction_label: int
+    pid: int
+    c_r: int
+    ipid: int
+    payload: bytes
+    number_of_packets: int
+    packets_received: int
+
+    def __init__(self, callback: Callback) -> None:
+        self.callback = callback
+        self.reset()
+
+    def reset(self) -> None:
+        self.packets_received = 0
+        self.transaction_label = -1
+        self.pid = -1
+        self.c_r = -1
+        self.ipid = -1
+        self.payload = b''
+        self.number_of_packets = 0
+        self.packet_count = 0
+
+    def on_pdu(self, pdu: bytes) -> None:
+        self.packets_received += 1
+
+        transaction_label = pdu[0] >> 4
+        packet_type = Protocol.PacketType((pdu[0] >> 2) & 3)
+        c_r = (pdu[0] >> 1) & 1
+        ipid = pdu[0] & 1
+
+        if c_r == 0 and ipid != 0:
+            logger.warning("invalid IPID in command frame")
+            self.reset()
+            return
+
+        pid_offset = 1
+        if packet_type in (Protocol.PacketType.SINGLE, Protocol.PacketType.START):
+            if self.transaction_label >= 0:
+                # We are already in a transaction
+                logger.warning("received START or SINGLE fragment while in transaction")
+                self.reset()
+                self.packets_received = 1
+
+            if packet_type == Protocol.PacketType.START:
+                self.number_of_packets = pdu[1]
+                pid_offset = 2
+
+        pid = struct.unpack_from(">H", pdu, pid_offset)[0]
+        self.payload += pdu[pid_offset + 2 :]
+
+        if packet_type in (Protocol.PacketType.CONTINUE, Protocol.PacketType.END):
+            if transaction_label != self.transaction_label:
+                logger.warning("transaction label does not match")
+                self.reset()
+                return
+
+            if pid != self.pid:
+                logger.warning("PID does not match")
+                self.reset()
+                return
+
+            if c_r != self.c_r:
+                logger.warning("C/R does not match")
+                self.reset()
+                return
+
+            if self.packets_received > self.number_of_packets:
+                logger.warning("too many fragments in transaction")
+                self.reset()
+                return
+
+            if packet_type == Protocol.PacketType.END:
+                if self.packets_received != self.number_of_packets:
+                    logger.warning("premature END")
+                    self.reset()
+                    return
+        else:
+            self.transaction_label = transaction_label
+            self.c_r = c_r
+            self.ipid = ipid
+            self.pid = pid
+
+        if packet_type in (Protocol.PacketType.SINGLE, Protocol.PacketType.END):
+            self.on_message_complete()
+
+    def on_message_complete(self):
+        try:
+            self.callback(
+                self.transaction_label,
+                self.c_r == 0,
+                self.ipid != 0,
+                self.pid,
+                self.payload,
+            )
+        except Exception as error:
+            logger.exception(color(f"!!! exception in callback: {error}", "red"))
+
+        self.reset()
+
+
+# -----------------------------------------------------------------------------
+class Protocol:
+    CommandHandler = Callable[[int, avc.CommandFrame], None]
+    command_handlers: Dict[int, CommandHandler]  # Command handlers, by PID
+    ResponseHandler = Callable[[int, Optional[avc.ResponseFrame]], None]
+    response_handlers: Dict[int, ResponseHandler]  # Response handlers, by PID
+    next_transaction_label: int
+    message_assembler: MessageAssembler
+
+    class PacketType(IntEnum):
+        SINGLE = 0b00
+        START = 0b01
+        CONTINUE = 0b10
+        END = 0b11
+
+    def __init__(self, l2cap_channel: l2cap.ClassicChannel) -> None:
+        self.command_handlers = {}
+        self.response_handlers = {}
+        self.l2cap_channel = l2cap_channel
+        self.message_assembler = MessageAssembler(self.on_message)
+
+        # Register to receive PDUs from the channel
+        l2cap_channel.sink = self.on_pdu
+        l2cap_channel.on("open", self.on_l2cap_channel_open)
+        l2cap_channel.on("close", self.on_l2cap_channel_close)
+
+    def on_l2cap_channel_open(self):
+        logger.debug(color("<<< AVCTP channel open", "magenta"))
+
+    def on_l2cap_channel_close(self):
+        logger.debug(color("<<< AVCTP channel closed", "magenta"))
+
+    def on_pdu(self, pdu: bytes) -> None:
+        self.message_assembler.on_pdu(pdu)
+
+    def on_message(
+        self,
+        transaction_label: int,
+        is_command: bool,
+        ipid: bool,
+        pid: int,
+        payload: bytes,
+    ) -> None:
+        logger.debug(
+            f"<<< AVCTP Message: pid={pid}, "
+            f"transaction_label={transaction_label}, "
+            f"is_command={is_command}, "
+            f"ipid={ipid}, "
+            f"payload={payload.hex()}"
+        )
+
+        # Check for invalid PID responses.
+        if ipid:
+            logger.debug(f"received IPID for PID={pid}")
+
+        # Find the appropriate handler.
+        if is_command:
+            if pid not in self.command_handlers:
+                logger.warning(f"no command handler for PID {pid}")
+                self.send_ipid(transaction_label, pid)
+                return
+
+            command_frame = cast(avc.CommandFrame, avc.Frame.from_bytes(payload))
+            self.command_handlers[pid](transaction_label, command_frame)
+        else:
+            if pid not in self.response_handlers:
+                logger.warning(f"no response handler for PID {pid}")
+                return
+
+            # By convention, for an ipid, send a None payload to the response handler.
+            if ipid:
+                response_frame = None
+            else:
+                response_frame = cast(avc.ResponseFrame, avc.Frame.from_bytes(payload))
+
+            self.response_handlers[pid](transaction_label, response_frame)
+
+    def send_message(
+        self,
+        transaction_label: int,
+        is_command: bool,
+        ipid: bool,
+        pid: int,
+        payload: bytes,
+    ):
+        # TODO: fragment large messages
+        packet_type = Protocol.PacketType.SINGLE
+        pdu = (
+            struct.pack(
+                ">BH",
+                transaction_label << 4
+                | packet_type << 2
+                | (0 if is_command else 1) << 1
+                | (1 if ipid else 0),
+                pid,
+            )
+            + payload
+        )
+        self.l2cap_channel.send_pdu(pdu)
+
+    def send_command(self, transaction_label: int, pid: int, payload: bytes) -> None:
+        logger.debug(
+            ">>> AVCTP command: "
+            f"transaction_label={transaction_label}, "
+            f"pid={pid}, "
+            f"payload={payload.hex()}"
+        )
+        self.send_message(transaction_label, True, False, pid, payload)
+
+    def send_response(self, transaction_label: int, pid: int, payload: bytes):
+        logger.debug(
+            ">>> AVCTP response: "
+            f"transaction_label={transaction_label}, "
+            f"pid={pid}, "
+            f"payload={payload.hex()}"
+        )
+        self.send_message(transaction_label, False, False, pid, payload)
+
+    def send_ipid(self, transaction_label: int, pid: int) -> None:
+        logger.debug(
+            ">>> AVCTP ipid: " f"transaction_label={transaction_label}, " f"pid={pid}"
+        )
+        self.send_message(transaction_label, False, True, pid, b'')
+
+    def register_command_handler(
+        self, pid: int, handler: Protocol.CommandHandler
+    ) -> None:
+        self.command_handlers[pid] = handler
+
+    def unregister_command_handler(
+        self, pid: int, handler: Protocol.CommandHandler
+    ) -> None:
+        if pid not in self.command_handlers or self.command_handlers[pid] != handler:
+            raise ValueError("command handler not registered")
+        del self.command_handlers[pid]
+
+    def register_response_handler(
+        self, pid: int, handler: Protocol.ResponseHandler
+    ) -> None:
+        self.response_handlers[pid] = handler
+
+    def unregister_response_handler(
+        self, pid: int, handler: Protocol.ResponseHandler
+    ) -> None:
+        if pid not in self.response_handlers or self.response_handlers[pid] != handler:
+            raise ValueError("response handler not registered")
+        del self.response_handlers[pid]

bumble/avdtp.py

@@ -241,7 +241,10 @@ async def find_avdtp_service_with_sdp_client(
         )
         if profile_descriptor_list:
             for profile_descriptor in profile_descriptor_list.value:
-                if len(profile_descriptor.value) >= 2:
+                if (
+                    profile_descriptor.type == sdp.DataElement.SEQUENCE
+                    and len(profile_descriptor.value) >= 2
+                ):
                     avdtp_version_major = profile_descriptor.value[1].value >> 8
                     avdtp_version_minor = profile_descriptor.value[1].value & 0xFF
                     return (avdtp_version_major, avdtp_version_minor)
@@ -511,7 +514,8 @@ class MessageAssembler:
         try:
             self.callback(self.transaction_label, message)
         except Exception as error:
-            logger.warning(color(f'!!! exception in callback: {error}'))
+            logger.exception(color(f'!!! exception in callback: {error}', 'red'))
+
         self.reset()
 
 
@@ -1466,10 +1470,10 @@ class Protocol(EventEmitter):
             f'[{transaction_label}] {message}'
         )
         max_fragment_size = (
-            self.l2cap_channel.mtu - 3
+            self.l2cap_channel.peer_mtu - 3
         )  # Enough space for a 3-byte start packet header
         payload = message.payload
-        if len(payload) + 2 <= self.l2cap_channel.mtu:
+        if len(payload) + 2 <= self.l2cap_channel.peer_mtu:
             # Fits in a single packet
             packet_type = self.PacketType.SINGLE_PACKET
         else:

bumble/controller.py

@@ -19,6 +19,7 @@ from __future__ import annotations
 
 import logging
 import asyncio
+import dataclasses
 import itertools
 import random
 import struct
@@ -42,6 +43,7 @@ from bumble.hci import (
     HCI_LE_1M_PHY,
     HCI_SUCCESS,
     HCI_UNKNOWN_HCI_COMMAND_ERROR,
+    HCI_UNKNOWN_CONNECTION_IDENTIFIER_ERROR,
     HCI_REMOTE_USER_TERMINATED_CONNECTION_ERROR,
     HCI_VERSION_BLUETOOTH_CORE_5_0,
     Address,
@@ -53,17 +55,21 @@ from bumble.hci import (
     HCI_Connection_Request_Event,
     HCI_Disconnection_Complete_Event,
     HCI_Encryption_Change_Event,
+    HCI_Synchronous_Connection_Complete_Event,
     HCI_LE_Advertising_Report_Event,
+    HCI_LE_CIS_Established_Event,
+    HCI_LE_CIS_Request_Event,
     HCI_LE_Connection_Complete_Event,
     HCI_LE_Read_Remote_Features_Complete_Event,
     HCI_Number_Of_Completed_Packets_Event,
     HCI_Packet,
     HCI_Role_Change_Event,
 )
-from typing import Optional, Union, Dict, TYPE_CHECKING
+from typing import Optional, Union, Dict, Any, TYPE_CHECKING
 
 if TYPE_CHECKING:
-    from bumble.transport.common import TransportSink, TransportSource
+    from bumble.link import LocalLink
+    from bumble.transport.common import TransportSink
 
 # -----------------------------------------------------------------------------
 # Logging
@@ -79,15 +85,27 @@ class DataObject:
 
 
 # -----------------------------------------------------------------------------
+@dataclasses.dataclass
+class CisLink:
+    handle: int
+    cis_id: int
+    cig_id: int
+    acl_connection: Optional[Connection] = None
+
+
+# -----------------------------------------------------------------------------
+@dataclasses.dataclass
 class Connection:
-    def __init__(self, controller, handle, role, peer_address, link, transport):
+    controller: Controller
-        self.controller = controller
+    handle: int
-        self.handle = handle
+    role: int
-        self.role = role
+    peer_address: Address
-        self.peer_address = peer_address
+    link: Any
-        self.link = link
+    transport: int
+    link_type: int
+
+    def __post_init__(self):
         self.assembler = HCI_AclDataPacketAssembler(self.on_acl_pdu)
-        self.transport = transport
 
     def on_hci_acl_data_packet(self, packet):
         self.assembler.feed_packet(packet)
@@ -106,10 +124,10 @@ class Connection:
 class Controller:
     def __init__(
         self,
-        name,
+        name: str,
         host_source=None,
         host_sink: Optional[TransportSink] = None,
-        link=None,
+        link: Optional[LocalLink] = None,
         public_address: Optional[Union[bytes, str, Address]] = None,
     ):
         self.name = name
@@ -125,6 +143,8 @@ class Controller:
         self.classic_connections: Dict[
             Address, Connection
         ] = {}  # Connections in BR/EDR
+        self.central_cis_links: Dict[int, CisLink] = {}  # CIS links by handle
+        self.peripheral_cis_links: Dict[int, CisLink] = {}  # CIS links by handle
 
         self.hci_version = HCI_VERSION_BLUETOOTH_CORE_5_0
         self.hci_revision = 0
@@ -134,12 +154,14 @@ class Controller:
             '0000000060000000'
         )  # BR/EDR Not Supported, LE Supported (Controller)
         self.manufacturer_name = 0xFFFF
+        self.hc_data_packet_length = 27
+        self.hc_total_num_data_packets = 64
         self.hc_le_data_packet_length = 27
         self.hc_total_num_le_data_packets = 64
         self.event_mask = 0
         self.event_mask_page_2 = 0
         self.supported_commands = bytes.fromhex(
-            '2000800000c000000000e40000002822000000000000040000f7ffff7f000000'
+            '2000800000c000000000e4000000a822000000000000040000f7ffff7f000000'
             '30f0f9ff01008004000000000000000000000000000000000000000000000000'
         )
         self.le_event_mask = 0
@@ -301,7 +323,7 @@ class Controller:
     ############################################################
     # Link connections
     ############################################################
-    def allocate_connection_handle(self):
+    def allocate_connection_handle(self) -> int:
         handle = 0
         max_handle = 0
         for connection in itertools.chain(
@@ -313,6 +335,13 @@ class Controller:
             if connection.handle == handle:
                 # Already used, continue searching after the current max
                 handle = max_handle + 1
+        for cis_handle in itertools.chain(
+            self.central_cis_links.keys(), self.peripheral_cis_links.keys()
+        ):
+            max_handle = max(max_handle, cis_handle)
+            if cis_handle == handle:
+                # Already used, continue searching after the current max
+                handle = max_handle + 1
         return handle
 
     def find_le_connection_by_address(self, address):
@@ -357,12 +386,13 @@ class Controller:
         if connection is None:
             connection_handle = self.allocate_connection_handle()
             connection = Connection(
-                self,
+                controller=self,
-                connection_handle,
+                handle=connection_handle,
-                BT_PERIPHERAL_ROLE,
+                role=BT_PERIPHERAL_ROLE,
-                peer_address,
+                peer_address=peer_address,
-                self.link,
+                link=self.link,
-                BT_LE_TRANSPORT,
+                transport=BT_LE_TRANSPORT,
+                link_type=HCI_Connection_Complete_Event.ACL_LINK_TYPE,
             )
             self.peripheral_connections[peer_address] = connection
             logger.debug(f'New PERIPHERAL connection handle: 0x{connection_handle:04X}')
@@ -416,12 +446,13 @@ class Controller:
             if connection is None:
                 connection_handle = self.allocate_connection_handle()
                 connection = Connection(
-                    self,
+                    controller=self,
-                    connection_handle,
+                    handle=connection_handle,
-                    BT_CENTRAL_ROLE,
+                    role=BT_CENTRAL_ROLE,
-                    peer_address,
+                    peer_address=peer_address,
-                    self.link,
+                    link=self.link,
-                    BT_LE_TRANSPORT,
+                    transport=BT_LE_TRANSPORT,
+                    link_type=HCI_Connection_Complete_Event.ACL_LINK_TYPE,
                 )
                 self.central_connections[peer_address] = connection
                 logger.debug(
@@ -538,6 +569,104 @@ class Controller:
         )
         self.send_hci_packet(HCI_LE_Advertising_Report_Event([report]))
 
+    def on_link_cis_request(
+        self, central_address: Address, cig_id: int, cis_id: int
+    ) -> None:
+        '''
+        Called when an incoming CIS request occurs from a central on the link
+        '''
+
+        connection = self.peripheral_connections.get(central_address)
+        assert connection
+
+        pending_cis_link = CisLink(
+            handle=self.allocate_connection_handle(),
+            cis_id=cis_id,
+            cig_id=cig_id,
+            acl_connection=connection,
+        )
+        self.peripheral_cis_links[pending_cis_link.handle] = pending_cis_link
+
+        self.send_hci_packet(
+            HCI_LE_CIS_Request_Event(
+                acl_connection_handle=connection.handle,
+                cis_connection_handle=pending_cis_link.handle,
+                cig_id=cig_id,
+                cis_id=cis_id,
+            )
+        )
+
+    def on_link_cis_established(self, cig_id: int, cis_id: int) -> None:
+        '''
+        Called when an incoming CIS established.
+        '''
+
+        cis_link = next(
+            cis_link
+            for cis_link in itertools.chain(
+                self.central_cis_links.values(), self.peripheral_cis_links.values()
+            )
+            if cis_link.cis_id == cis_id and cis_link.cig_id == cig_id
+        )
+
+        self.send_hci_packet(
+            HCI_LE_CIS_Established_Event(
+                status=HCI_SUCCESS,
+                connection_handle=cis_link.handle,
+                # CIS parameters are ignored.
+                cig_sync_delay=0,
+                cis_sync_delay=0,
+                transport_latency_c_to_p=0,
+                transport_latency_p_to_c=0,
+                phy_c_to_p=0,
+                phy_p_to_c=0,
+                nse=0,
+                bn_c_to_p=0,
+                bn_p_to_c=0,
+                ft_c_to_p=0,
+                ft_p_to_c=0,
+                max_pdu_c_to_p=0,
+                max_pdu_p_to_c=0,
+                iso_interval=0,
+            )
+        )
+
+    def on_link_cis_disconnected(self, cig_id: int, cis_id: int) -> None:
+        '''
+        Called when a CIS disconnected.
+        '''
+
+        if cis_link := next(
+            (
+                cis_link
+                for cis_link in self.peripheral_cis_links.values()
+                if cis_link.cis_id == cis_id and cis_link.cig_id == cig_id
+            ),
+            None,
+        ):
+            # Remove peripheral CIS on disconnection.
+            self.peripheral_cis_links.pop(cis_link.handle)
+        elif cis_link := next(
+            (
+                cis_link
+                for cis_link in self.central_cis_links.values()
+                if cis_link.cis_id == cis_id and cis_link.cig_id == cig_id
+            ),
+            None,
+        ):
+            # Keep central CIS on disconnection. They should be removed by HCI_LE_Remove_CIG_Command.
+            cis_link.acl_connection = None
+        else:
+            return
+
+        self.send_hci_packet(
+            HCI_Disconnection_Complete_Event(
+                status=HCI_SUCCESS,
+                connection_handle=cis_link.handle,
+                reason=HCI_REMOTE_USER_TERMINATED_CONNECTION_ERROR,
+            )
+        )
+
     ############################################################
     # Classic link connections
     ############################################################
@@ -566,6 +695,7 @@ class Controller:
                     peer_address=peer_address,
                     link=self.link,
                     transport=BT_BR_EDR_TRANSPORT,
+                    link_type=HCI_Connection_Complete_Event.ACL_LINK_TYPE,
                 )
                 self.classic_connections[peer_address] = connection
                 logger.debug(
@@ -619,6 +749,42 @@ class Controller:
             )
         )
 
+    def on_classic_sco_connection_complete(
+        self, peer_address: Address, status: int, link_type: int
+    ):
+        if status == HCI_SUCCESS:
+            # Allocate (or reuse) a connection handle
+            connection_handle = self.allocate_connection_handle()
+            connection = Connection(
+                controller=self,
+                handle=connection_handle,
+                # Role doesn't matter in SCO.
+                role=BT_CENTRAL_ROLE,
+                peer_address=peer_address,
+                link=self.link,
+                transport=BT_BR_EDR_TRANSPORT,
+                link_type=link_type,
+            )
+            self.classic_connections[peer_address] = connection
+            logger.debug(f'New SCO connection handle: 0x{connection_handle:04X}')
+        else:
+            connection_handle = 0
+
+        self.send_hci_packet(
+            HCI_Synchronous_Connection_Complete_Event(
+                status=status,
+                connection_handle=connection_handle,
+                bd_addr=peer_address,
+                link_type=link_type,
+                # TODO: Provide SCO connection parameters.
+                transmission_interval=0,
+                retransmission_window=0,
+                rx_packet_length=0,
+                tx_packet_length=0,
+                air_mode=0,
+            )
+        )
+
     ############################################################
     # Advertising support
     ############################################################
@@ -721,6 +887,17 @@ class Controller:
             else:
                 # Remove the connection
                 del self.classic_connections[connection.peer_address]
+        elif cis_link := (
+            self.central_cis_links.get(handle) or self.peripheral_cis_links.get(handle)
+        ):
+            if self.link:
+                self.link.disconnect_cis(
+                    initiator_controller=self,
+                    peer_address=cis_link.acl_connection.peer_address,
+                    cig_id=cis_link.cig_id,
+                    cis_id=cis_link.cis_id,
+                )
+            # Spec requires handle to be kept after disconnection.
 
     def on_hci_accept_connection_request_command(self, command):
         '''
@@ -738,6 +915,68 @@ class Controller:
         )
         self.link.classic_accept_connection(self, command.bd_addr, command.role)
 
+    def on_hci_enhanced_setup_synchronous_connection_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.1.45 Enhanced Setup Synchronous Connection command
+        '''
+
+        if self.link is None:
+            return
+
+        if not (
+            connection := self.find_classic_connection_by_handle(
+                command.connection_handle
+            )
+        ):
+            self.send_hci_packet(
+                HCI_Command_Status_Event(
+                    status=HCI_UNKNOWN_CONNECTION_IDENTIFIER_ERROR,
+                    num_hci_command_packets=1,
+                    command_opcode=command.op_code,
+                )
+            )
+            return
+
+        self.send_hci_packet(
+            HCI_Command_Status_Event(
+                status=HCI_SUCCESS,
+                num_hci_command_packets=1,
+                command_opcode=command.op_code,
+            )
+        )
+        self.link.classic_sco_connect(
+            self, connection.peer_address, HCI_Connection_Complete_Event.ESCO_LINK_TYPE
+        )
+
+    def on_hci_enhanced_accept_synchronous_connection_request_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.1.46 Enhanced Accept Synchronous Connection Request command
+        '''
+
+        if self.link is None:
+            return
+
+        if not (connection := self.find_classic_connection_by_address(command.bd_addr)):
+            self.send_hci_packet(
+                HCI_Command_Status_Event(
+                    status=HCI_UNKNOWN_CONNECTION_IDENTIFIER_ERROR,
+                    num_hci_command_packets=1,
+                    command_opcode=command.op_code,
+                )
+            )
+            return
+
+        self.send_hci_packet(
+            HCI_Command_Status_Event(
+                status=HCI_SUCCESS,
+                num_hci_command_packets=1,
+                command_opcode=command.op_code,
+            )
+        )
+        self.link.classic_accept_sco_connection(
+            self, connection.peer_address, HCI_Connection_Complete_Event.ESCO_LINK_TYPE
+        )
+
     def on_hci_switch_role_command(self, command):
         '''
         See Bluetooth spec Vol 4, Part E - 7.2.8 Switch Role command
@@ -912,7 +1151,41 @@ class Controller:
         '''
         See Bluetooth spec Vol 4, Part E - 7.4.3 Read Local Supported Features Command
         '''
-        return bytes([HCI_SUCCESS]) + self.lmp_features
+        return bytes([HCI_SUCCESS]) + self.lmp_features[:8]
+
+    def on_hci_read_local_extended_features_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.4.4 Read Local Extended Features Command
+        '''
+        if command.page_number * 8 > len(self.lmp_features):
+            return bytes([HCI_INVALID_HCI_COMMAND_PARAMETERS_ERROR])
+        return (
+            bytes(
+                [
+                    # Status
+                    HCI_SUCCESS,
+                    # Page number
+                    command.page_number,
+                    # Max page number
+                    len(self.lmp_features) // 8 - 1,
+                ]
+            )
+            # Features of the current page
+            + self.lmp_features[command.page_number * 8 : (command.page_number + 1) * 8]
+        )
+
+    def on_hci_read_buffer_size_command(self, _command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.4.5 Read Buffer Size Command
+        '''
+        return struct.pack(
+            '<BHBHH',
+            HCI_SUCCESS,
+            self.hc_data_packet_length,
+            0,
+            self.hc_total_num_data_packets,
+            0,
+        )
 
     def on_hci_read_bd_addr_command(self, _command):
         '''
@@ -1089,6 +1362,18 @@ class Controller:
         See Bluetooth spec Vol 4, Part E - 7.8.21 LE Read Remote Features Command
         '''
 
+        handle = command.connection_handle
+
+        if not self.find_connection_by_handle(handle):
+            self.send_hci_packet(
+                HCI_Command_Status_Event(
+                    status=HCI_INVALID_HCI_COMMAND_PARAMETERS_ERROR,
+                    num_hci_command_packets=1,
+                    command_opcode=command.op_code,
+                )
+            )
+            return
+
         # First, say that the command is pending
         self.send_hci_packet(
             HCI_Command_Status_Event(
@@ -1102,7 +1387,7 @@ class Controller:
         self.send_hci_packet(
             HCI_LE_Read_Remote_Features_Complete_Event(
                 status=HCI_SUCCESS,
-                connection_handle=0,
+                connection_handle=handle,
                 le_features=bytes.fromhex('dd40000000000000'),
             )
         )
@@ -1258,8 +1543,135 @@ class Controller:
         }
         return bytes([HCI_SUCCESS])
 
+    def on_hci_le_read_maximum_advertising_data_length_command(self, _command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.8.57 LE Read Maximum Advertising Data
+        Length Command
+        '''
+        return struct.pack('<BH', HCI_SUCCESS, 0x0672)
+
+    def on_hci_le_read_number_of_supported_advertising_sets_command(self, _command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.8.58 LE Read Number of Supported
+        Advertising Set Command
+        '''
+        return struct.pack('<BB', HCI_SUCCESS, 0xF0)
+
     def on_hci_le_read_transmit_power_command(self, _command):
         '''
         See Bluetooth spec Vol 4, Part E - 7.8.74 LE Read Transmit Power Command
         '''
         return struct.pack('<BBB', HCI_SUCCESS, 0, 0)
+
+    def on_hci_le_set_cig_parameters_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.8.97 LE Set CIG Parameter Command
+        '''
+
+        # Remove old CIG implicitly.
+        for handle, cis_link in self.central_cis_links.items():
+            if cis_link.cig_id == command.cig_id:
+                self.central_cis_links.pop(handle)
+
+        handles = []
+        for cis_id in command.cis_id:
+            handle = self.allocate_connection_handle()
+            handles.append(handle)
+            self.central_cis_links[handle] = CisLink(
+                cis_id=cis_id,
+                cig_id=command.cig_id,
+                handle=handle,
+            )
+        return struct.pack(
+            '<BBB', HCI_SUCCESS, command.cig_id, len(handles)
+        ) + b''.join([struct.pack('<H', handle) for handle in handles])
+
+    def on_hci_le_create_cis_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.8.99 LE Create CIS Command
+        '''
+        if not self.link:
+            return
+
+        for cis_handle, acl_handle in zip(
+            command.cis_connection_handle, command.acl_connection_handle
+        ):
+            if not (connection := self.find_connection_by_handle(acl_handle)):
+                logger.error(f'Cannot find connection with handle={acl_handle}')
+                return bytes([HCI_INVALID_HCI_COMMAND_PARAMETERS_ERROR])
+
+            if not (cis_link := self.central_cis_links.get(cis_handle)):
+                logger.error(f'Cannot find CIS with handle={cis_handle}')
+                return bytes([HCI_INVALID_HCI_COMMAND_PARAMETERS_ERROR])
+
+            cis_link.acl_connection = connection
+
+            self.link.create_cis(
+                self,
+                peripheral_address=connection.peer_address,
+                cig_id=cis_link.cig_id,
+                cis_id=cis_link.cis_id,
+            )
+
+        self.send_hci_packet(
+            HCI_Command_Status_Event(
+                status=HCI_COMMAND_STATUS_PENDING,
+                num_hci_command_packets=1,
+                command_opcode=command.op_code,
+            )
+        )
+
+    def on_hci_le_remove_cig_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.8.100 LE Remove CIG Command
+        '''
+
+        status = HCI_UNKNOWN_CONNECTION_IDENTIFIER_ERROR
+
+        for cis_handle, cis_link in self.central_cis_links.items():
+            if cis_link.cig_id == command.cig_id:
+                self.central_cis_links.pop(cis_handle)
+                status = HCI_SUCCESS
+
+        return struct.pack('<BH', status, command.cig_id)
+
+    def on_hci_le_accept_cis_request_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.8.101 LE Accept CIS Request Command
+        '''
+        if not self.link:
+            return
+
+        if not (
+            pending_cis_link := self.peripheral_cis_links.get(command.connection_handle)
+        ):
+            logger.error(f'Cannot find CIS with handle={command.connection_handle}')
+            return bytes([HCI_INVALID_HCI_COMMAND_PARAMETERS_ERROR])
+
+        assert pending_cis_link.acl_connection
+        self.link.accept_cis(
+            peripheral_controller=self,
+            central_address=pending_cis_link.acl_connection.peer_address,
+            cig_id=pending_cis_link.cig_id,
+            cis_id=pending_cis_link.cis_id,
+        )
+
+        self.send_hci_packet(
+            HCI_Command_Status_Event(
+                status=HCI_COMMAND_STATUS_PENDING,
+                num_hci_command_packets=1,
+                command_opcode=command.op_code,
+            )
+        )
+
+    def on_hci_le_setup_iso_data_path_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.8.109 LE Setup ISO Data Path Command
+        '''
+        return struct.pack('<BH', HCI_SUCCESS, command.connection_handle)
+
+    def on_hci_le_remove_iso_data_path_command(self, command):
+        '''
+        See Bluetooth spec Vol 4, Part E - 7.8.110 LE Remove ISO Data Path Command
+        '''
+        return struct.pack('<BH', HCI_SUCCESS, command.connection_handle)

bumble/core.py

@@ -97,12 +97,16 @@ class BaseError(Exception):
             namespace = f'{self.error_namespace}/'
         else:
             namespace = ''
-        error_text = {
+        have_name = self.error_name != ''
-            (True, True): f'{self.error_name} [0x{self.error_code:X}]',
+        have_code = self.error_code is not None
-            (True, False): self.error_name,
+        if have_name and have_code:
-            (False, True): f'0x{self.error_code:X}',
+            error_text = f'{self.error_name} [0x{self.error_code:X}]'
-            (False, False): '',
+        elif have_name and not have_code:
-        }[(self.error_name != '', self.error_code is not None)]
+            error_text = self.error_name
+        elif not have_name and have_code:
+            error_text = f'0x{self.error_code:X}'
+        else:
+            error_text = '<unspecified>'
 
         return f'{type(self).__name__}({namespace}{error_text})'
 
@@ -319,7 +323,7 @@ BT_HIDP_PROTOCOL_ID                     = UUID.from_16_bits(0x0011, 'HIDP')
 BT_HARDCOPY_CONTROL_CHANNEL_PROTOCOL_ID = UUID.from_16_bits(0x0012, 'HardcopyControlChannel')
 BT_HARDCOPY_DATA_CHANNEL_PROTOCOL_ID    = UUID.from_16_bits(0x0014, 'HardcopyDataChannel')
 BT_HARDCOPY_NOTIFICATION_PROTOCOL_ID    = UUID.from_16_bits(0x0016, 'HardcopyNotification')
-BT_AVTCP_PROTOCOL_ID                    = UUID.from_16_bits(0x0017, 'AVCTP')
+BT_AVCTP_PROTOCOL_ID                    = UUID.from_16_bits(0x0017, 'AVCTP')
 BT_AVDTP_PROTOCOL_ID                    = UUID.from_16_bits(0x0019, 'AVDTP')
 BT_CMTP_PROTOCOL_ID                     = UUID.from_16_bits(0x001B, 'CMTP')
 BT_MCAP_CONTROL_CHANNEL_PROTOCOL_ID     = UUID.from_16_bits(0x001E, 'MCAPControlChannel')
@@ -821,8 +825,8 @@ class AdvertisingData:
             ad_structures = []
         self.ad_structures = ad_structures[:]
 
-    @staticmethod
+    @classmethod
-    def from_bytes(data):
+    def from_bytes(cls, data: bytes) -> AdvertisingData:
         instance = AdvertisingData()
         instance.append(data)
         return instance
@@ -978,7 +982,7 @@ class AdvertisingData:
 
         return ad_data
 
-    def append(self, data):
+    def append(self, data: bytes) -> None:
         offset = 0
         while offset + 1 < len(data):
             length = data[offset]

bumble/crypto.py

@@ -100,6 +100,16 @@ class EccKey:
 # -----------------------------------------------------------------------------
 
 
+# -----------------------------------------------------------------------------
+def generate_prand() -> bytes:
+    '''Generates random 3 bytes, with the 2 most significant bits of 0b01.
+
+    See Bluetooth spec, Vol 6, Part E - Table 1.2.
+    '''
+    prand_bytes = secrets.token_bytes(6)
+    return prand_bytes[:2] + bytes([(prand_bytes[2] & 0b01111111) | 0b01000000])
+
+
 # -----------------------------------------------------------------------------
 def xor(x: bytes, y: bytes) -> bytes:
     assert len(x) == len(y)

bumble/drivers/__init__.py

@@ -19,12 +19,17 @@ like loading firmware after a cold start.
 # -----------------------------------------------------------------------------
 # Imports
 # -----------------------------------------------------------------------------
-import abc
+from __future__ import annotations
 import logging
 import pathlib
 import platform
-from . import rtk
+from typing import Dict, Iterable, Optional, Type, TYPE_CHECKING
 
+from . import rtk, intel
+from .common import Driver
+
+if TYPE_CHECKING:
+    from bumble.host import Host
 
 # -----------------------------------------------------------------------------
 # Logging
@@ -32,40 +37,31 @@ from . import rtk
 logger = logging.getLogger(__name__)
 
 
-# -----------------------------------------------------------------------------
-# Classes
-# -----------------------------------------------------------------------------
-class Driver(abc.ABC):
-    """Base class for drivers."""
-
-    @staticmethod
-    async def for_host(_host):
-        """Return a driver instance for a host.
-
-        Args:
-            host: Host object for which a driver should be created.
-
-        Returns:
-            A Driver instance if a driver should be instantiated for this host, or
-            None if no driver instance of this class is needed.
-        """
-        return None
-
-    @abc.abstractmethod
-    async def init_controller(self):
-        """Initialize the controller."""
-
-
 # -----------------------------------------------------------------------------
 # Functions
 # -----------------------------------------------------------------------------
-async def get_driver_for_host(host):
+async def get_driver_for_host(host: Host) -> Optional[Driver]:
-    """Probe all known diver classes until one returns a valid instance for a host,
+    """Probe diver classes until one returns a valid instance for a host, or none is
-    or none is found.
+    found.
+    If a "driver" HCI metadata entry is present, only that driver class will be probed.
     """
-    if driver := await rtk.Driver.for_host(host):
+    driver_classes: Dict[str, Type[Driver]] = {"rtk": rtk.Driver, "intel": intel.Driver}
-        logger.debug("Instantiated RTK driver")
+    probe_list: Iterable[str]
+    if driver_name := host.hci_metadata.get("driver"):
+        # Only probe a single driver
+        probe_list = [driver_name]
+    else:
+        # Probe all drivers
+        probe_list = driver_classes.keys()
+
+    for driver_name in probe_list:
+        if driver_class := driver_classes.get(driver_name):
+            logger.debug(f"Probing driver class: {driver_name}")
+            if driver := await driver_class.for_host(host):
+                logger.debug(f"Instantiated {driver_name} driver")
                 return driver
+        else:
+            logger.debug(f"Skipping unknown driver class: {driver_name}")
 
     return None
 

bumble/drivers/common.py

@@ -0,0 +1,45 @@
+# Copyright 2021-2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Common types for drivers.
+"""
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import abc
+
+
+# -----------------------------------------------------------------------------
+# Classes
+# -----------------------------------------------------------------------------
+class Driver(abc.ABC):
+    """Base class for drivers."""
+
+    @staticmethod
+    async def for_host(_host):
+        """Return a driver instance for a host.
+
+        Args:
+            host: Host object for which a driver should be created.
+
+        Returns:
+            A Driver instance if a driver should be instantiated for this host, or
+            None if no driver instance of this class is needed.
+        """
+        return None
+
+    @abc.abstractmethod
+    async def init_controller(self):
+        """Initialize the controller."""

bumble/drivers/intel.py

@@ -0,0 +1,102 @@
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import logging
+
+from bumble.drivers import common
+from bumble.hci import (
+    hci_vendor_command_op_code,  # type: ignore
+    HCI_Command,
+    HCI_Reset_Command,
+)
+
+# -----------------------------------------------------------------------------
+# Logging
+# -----------------------------------------------------------------------------
+logger = logging.getLogger(__name__)
+
+# -----------------------------------------------------------------------------
+# Constant
+# -----------------------------------------------------------------------------
+
+INTEL_USB_PRODUCTS = {
+    # Intel AX210
+    (0x8087, 0x0032),
+    # Intel BE200
+    (0x8087, 0x0036),
+}
+
+# -----------------------------------------------------------------------------
+# HCI Commands
+# -----------------------------------------------------------------------------
+HCI_INTEL_DDC_CONFIG_WRITE_COMMAND = hci_vendor_command_op_code(0xFC8B)  # type: ignore
+HCI_INTEL_DDC_CONFIG_WRITE_PAYLOAD = [0x03, 0xE4, 0x02, 0x00]
+
+HCI_Command.register_commands(globals())
+
+
+@HCI_Command.command(  # type: ignore
+    fields=[("params", "*")],
+    return_parameters_fields=[
+        ("params", "*"),
+    ],
+)
+class Hci_Intel_DDC_Config_Write_Command(HCI_Command):
+    pass
+
+
+class Driver(common.Driver):
+    def __init__(self, host):
+        self.host = host
+
+    @staticmethod
+    def check(host):
+        driver = host.hci_metadata.get("driver")
+        if driver == "intel":
+            return True
+
+        vendor_id = host.hci_metadata.get("vendor_id")
+        product_id = host.hci_metadata.get("product_id")
+
+        if vendor_id is None or product_id is None:
+            logger.debug("USB metadata not sufficient")
+            return False
+
+        if (vendor_id, product_id) not in INTEL_USB_PRODUCTS:
+            logger.debug(
+                f"USB device ({vendor_id:04X}, {product_id:04X}) " "not in known list"
+            )
+            return False
+
+        return True
+
+    @classmethod
+    async def for_host(cls, host, force=False):  # type: ignore
+        # Only instantiate this driver if explicitly selected
+        if not force and not cls.check(host):
+            return None
+
+        return cls(host)
+
+    async def init_controller(self):
+        self.host.ready = True
+        await self.host.send_command(HCI_Reset_Command(), check_result=True)
+        await self.host.send_command(
+            Hci_Intel_DDC_Config_Write_Command(
+                params=HCI_INTEL_DDC_CONFIG_WRITE_PAYLOAD
+            )
+        )

bumble/drivers/rtk.py

@@ -41,7 +41,7 @@ from bumble.hci import (
     HCI_Reset_Command,
     HCI_Read_Local_Version_Information_Command,
 )
-
+from bumble.drivers import common
 
 # -----------------------------------------------------------------------------
 # Logging
@@ -285,7 +285,7 @@ class Firmware:
             )
 
 
-class Driver:
+class Driver(common.Driver):
     @dataclass
     class DriverInfo:
         rom: int
@@ -470,8 +470,12 @@ class Driver:
             logger.debug("USB metadata not found")
             return False
 
-        vendor_id = host.hci_metadata.get("vendor_id", None)
+        if host.hci_metadata.get('driver') == 'rtk':
-        product_id = host.hci_metadata.get("product_id", None)
+            # Forced driver
+            return True
+
+        vendor_id = host.hci_metadata.get("vendor_id")
+        product_id = host.hci_metadata.get("product_id")
         if vendor_id is None or product_id is None:
             logger.debug("USB metadata not sufficient")
             return False
@@ -486,6 +490,9 @@ class Driver:
 
     @classmethod
     async def driver_info_for_host(cls, host):
+        await host.send_command(HCI_Reset_Command(), check_result=True)
+        host.ready = True  # Needed to let the host know the controller is ready.
+
         response = await host.send_command(
             HCI_Read_Local_Version_Information_Command(), check_result=True
         )

bumble/gatt.py

@@ -23,16 +23,28 @@
 # Imports
 # -----------------------------------------------------------------------------
 from __future__ import annotations
-import asyncio
 import enum
 import functools
 import logging
 import struct
-from typing import Optional, Sequence, Iterable, List, Union
+from typing import (
+    Callable,
+    Dict,
+    Iterable,
+    List,
+    Optional,
+    Sequence,
+    Union,
+    TYPE_CHECKING,
+)
 
-from .colors import color
+from bumble.colors import color
-from .core import UUID, get_dict_key_by_value
+from bumble.core import UUID
-from .att import Attribute
+from bumble.att import Attribute, AttributeValue
+
+if TYPE_CHECKING:
+    from bumble.gatt_client import AttributeProxy
+    from bumble.device import Connection
 
 
 # -----------------------------------------------------------------------------
@@ -368,9 +380,12 @@ class TemplateService(Service):
     UUID: UUID
 
     def __init__(
-        self, characteristics: List[Characteristic], primary: bool = True
+        self,
+        characteristics: List[Characteristic],
+        primary: bool = True,
+        included_services: List[Service] = [],
     ) -> None:
-        super().__init__(self.UUID, characteristics, primary)
+        super().__init__(self.UUID, characteristics, primary, included_services)
 
 
 # -----------------------------------------------------------------------------
@@ -519,56 +534,43 @@ class CharacteristicDeclaration(Attribute):
 
 
 # -----------------------------------------------------------------------------
-class CharacteristicValue:
+class CharacteristicValue(AttributeValue):
-    '''
+    """Same as AttributeValue, for backward compatibility"""
-    Characteristic value where reading and/or writing is delegated to functions
-    passed as arguments to the constructor.
-    '''
-
-    def __init__(self, read=None, write=None):
-        self._read = read
-        self._write = write
-
-    def read(self, connection):
-        return self._read(connection) if self._read else b''
-
-    def write(self, connection, value):
-        if self._write:
-            self._write(connection, value)
 
 
 # -----------------------------------------------------------------------------
 class CharacteristicAdapter:
     '''
-    An adapter that can adapt any object with `read_value` and `write_value`
+    An adapter that can adapt Characteristic and AttributeProxy objects
-    methods (like Characteristic and CharacteristicProxy objects) by wrapping
+    by wrapping their `read_value()` and `write_value()` methods with ones that
-    those methods with ones that return/accept encoded/decoded values.
+    return/accept encoded/decoded values.
-    Objects with async methods are considered proxies, so the adaptation is one
+
-    where the return value of `read_value` is decoded and the value passed to
+    For proxies (i.e used by a GATT client), the adaptation is one where the return
-    `write_value` is encoded. Other objects are considered local characteristics
+    value of `read_value()` is decoded and the value passed to `write_value()` is
-    so the adaptation is one where the return value of `read_value` is encoded
+    encoded. The `subscribe()` method, is wrapped with one where the values are decoded
-    and the value passed to `write_value` is decoded.
+    before being passed to the subscriber.
-    If the characteristic has a `subscribe` method, it is wrapped with one where
+
-    the values are decoded before being passed to the subscriber.
+    For local values (i.e hosted by a GATT server) the adaptation is one where the
+    return value of `read_value()` is encoded and the value passed to `write_value()`
+    is decoded.
     '''
 
-    def __init__(self, characteristic):
+    read_value: Callable
-        self.wrapped_characteristic = characteristic
+    write_value: Callable
-        self.subscribers = {}  # Map from subscriber to proxy subscriber
 
-        if asyncio.iscoroutinefunction(
+    def __init__(self, characteristic: Union[Characteristic, AttributeProxy]):
-            characteristic.read_value
+        self.wrapped_characteristic = characteristic
-        ) and asyncio.iscoroutinefunction(characteristic.write_value):
+        self.subscribers: Dict[
-            self.read_value = self.read_decoded_value
+            Callable, Callable
-            self.write_value = self.write_decoded_value
+        ] = {}  # Map from subscriber to proxy subscriber
-        else:
+
+        if isinstance(characteristic, Characteristic):
             self.read_value = self.read_encoded_value
             self.write_value = self.write_encoded_value
-
+        else:
-        if hasattr(self.wrapped_characteristic, 'subscribe'):
+            self.read_value = self.read_decoded_value
+            self.write_value = self.write_decoded_value
             self.subscribe = self.wrapped_subscribe
-
-        if hasattr(self.wrapped_characteristic, 'unsubscribe'):
             self.unsubscribe = self.wrapped_unsubscribe
 
     def __getattr__(self, name):
@@ -587,11 +589,13 @@ class CharacteristicAdapter:
         else:
             setattr(self.wrapped_characteristic, name, value)
 
-    def read_encoded_value(self, connection):
+    async def read_encoded_value(self, connection):
-        return self.encode_value(self.wrapped_characteristic.read_value(connection))
+        return self.encode_value(
+            await self.wrapped_characteristic.read_value(connection)
+        )
 
-    def write_encoded_value(self, connection, value):
+    async def write_encoded_value(self, connection, value):
-        return self.wrapped_characteristic.write_value(
+        return await self.wrapped_characteristic.write_value(
             connection, self.decode_value(value)
         )
 
@@ -726,13 +730,24 @@ class Descriptor(Attribute):
     '''
 
     def __str__(self) -> str:
+        if isinstance(self.value, bytes):
+            value_str = self.value.hex()
+        elif isinstance(self.value, CharacteristicValue):
+            value = self.value.read(None)
+            if isinstance(value, bytes):
+                value_str = value.hex()
+            else:
+                value_str = '<async>'
+        else:
+            value_str = '<...>'
         return (
             f'Descriptor(handle=0x{self.handle:04X}, '
             f'type={self.type}, '
-            f'value={self.read_value(None).hex()})'
+            f'value={value_str})'
         )
 
 
+# -----------------------------------------------------------------------------
 class ClientCharacteristicConfigurationBits(enum.IntFlag):
     '''
     See Vol 3, Part G - 3.3.3.3 - Table 3.11 Client Characteristic Configuration bit

bumble/gatt_client.py

@@ -1068,7 +1068,7 @@ class Client:
                 logger.warning('!!! unexpected response, there is no pending request')
                 return
 
-            # Sanity check: the response should match the pending request unless it is
+            # The response should match the pending request unless it is
             # an error response
             if att_pdu.op_code != ATT_ERROR_RESPONSE:
                 expected_response_name = self.pending_request.name.replace(

bumble/gatt_server.py

@@ -31,9 +31,9 @@ import struct
 from typing import List, Tuple, Optional, TypeVar, Type, Dict, Iterable, TYPE_CHECKING
 from pyee import EventEmitter
 
-from .colors import color
+from bumble.colors import color
-from .core import UUID
+from bumble.core import UUID
-from .att import (
+from bumble.att import (
     ATT_ATTRIBUTE_NOT_FOUND_ERROR,
     ATT_ATTRIBUTE_NOT_LONG_ERROR,
     ATT_CID,
@@ -60,7 +60,7 @@ from .att import (
     ATT_Write_Response,
     Attribute,
 )
-from .gatt import (
+from bumble.gatt import (
     GATT_CHARACTERISTIC_ATTRIBUTE_TYPE,
     GATT_CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR,
     GATT_MAX_ATTRIBUTE_VALUE_SIZE,
@@ -74,6 +74,7 @@ from .gatt import (
     Descriptor,
     Service,
 )
+from bumble.utils import AsyncRunner
 
 if TYPE_CHECKING:
     from bumble.device import Device, Connection
@@ -327,7 +328,7 @@ class Server(EventEmitter):
             f'handle=0x{characteristic.handle:04X}: {value.hex()}'
         )
 
-        # Sanity check
+        # Check parameters
         if len(value) != 2:
             logger.warning('CCCD value not 2 bytes long')
             return
@@ -379,7 +380,7 @@ class Server(EventEmitter):
 
         # Get or encode the value
         value = (
-            attribute.read_value(connection)
+            await attribute.read_value(connection)
             if value is None
             else attribute.encode_value(value)
         )
@@ -422,7 +423,7 @@ class Server(EventEmitter):
 
         # Get or encode the value
         value = (
-            attribute.read_value(connection)
+            await attribute.read_value(connection)
             if value is None
             else attribute.encode_value(value)
         )
@@ -650,7 +651,8 @@ class Server(EventEmitter):
 
         self.send_response(connection, response)
 
-    def on_att_find_by_type_value_request(self, connection, request):
+    @AsyncRunner.run_in_task()
+    async def on_att_find_by_type_value_request(self, connection, request):
         '''
         See Bluetooth spec Vol 3, Part F - 3.4.3.3 Find By Type Value Request
         '''
@@ -658,13 +660,13 @@ class Server(EventEmitter):
         # Build list of returned attributes
         pdu_space_available = connection.att_mtu - 2
         attributes = []
-        for attribute in (
+        async for attribute in (
             attribute
             for attribute in self.attributes
             if attribute.handle >= request.starting_handle
             and attribute.handle <= request.ending_handle
             and attribute.type == request.attribute_type
-            and attribute.read_value(connection) == request.attribute_value
+            and (await attribute.read_value(connection)) == request.attribute_value
             and pdu_space_available >= 4
         ):
             # TODO: check permissions
@@ -702,7 +704,8 @@ class Server(EventEmitter):
 
         self.send_response(connection, response)
 
-    def on_att_read_by_type_request(self, connection, request):
+    @AsyncRunner.run_in_task()
+    async def on_att_read_by_type_request(self, connection, request):
         '''
         See Bluetooth spec Vol 3, Part F - 3.4.4.1 Read By Type Request
         '''
@@ -725,7 +728,7 @@ class Server(EventEmitter):
             and pdu_space_available
         ):
             try:
-                attribute_value = attribute.read_value(connection)
+                attribute_value = await attribute.read_value(connection)
             except ATT_Error as error:
                 # If the first attribute is unreadable, return an error
                 # Otherwise return attributes up to this point
@@ -767,14 +770,15 @@ class Server(EventEmitter):
 
         self.send_response(connection, response)
 
-    def on_att_read_request(self, connection, request):
+    @AsyncRunner.run_in_task()
+    async def on_att_read_request(self, connection, request):
         '''
         See Bluetooth spec Vol 3, Part F - 3.4.4.3 Read Request
         '''
 
         if attribute := self.get_attribute(request.attribute_handle):
             try:
-                value = attribute.read_value(connection)
+                value = await attribute.read_value(connection)
             except ATT_Error as error:
                 response = ATT_Error_Response(
                     request_opcode_in_error=request.op_code,
@@ -792,14 +796,15 @@ class Server(EventEmitter):
             )
         self.send_response(connection, response)
 
-    def on_att_read_blob_request(self, connection, request):
+    @AsyncRunner.run_in_task()
+    async def on_att_read_blob_request(self, connection, request):
         '''
         See Bluetooth spec Vol 3, Part F - 3.4.4.5 Read Blob Request
         '''
 
         if attribute := self.get_attribute(request.attribute_handle):
             try:
-                value = attribute.read_value(connection)
+                value = await attribute.read_value(connection)
             except ATT_Error as error:
                 response = ATT_Error_Response(
                     request_opcode_in_error=request.op_code,
@@ -836,7 +841,8 @@ class Server(EventEmitter):
             )
         self.send_response(connection, response)
 
-    def on_att_read_by_group_type_request(self, connection, request):
+    @AsyncRunner.run_in_task()
+    async def on_att_read_by_group_type_request(self, connection, request):
         '''
         See Bluetooth spec Vol 3, Part F - 3.4.4.9 Read by Group Type Request
         '''
@@ -864,7 +870,7 @@ class Server(EventEmitter):
         ):
             # No need to catch permission errors here, since these attributes
             # must all be world-readable
-            attribute_value = attribute.read_value(connection)
+            attribute_value = await attribute.read_value(connection)
             # Check the attribute value size
             max_attribute_size = min(connection.att_mtu - 6, 251)
             if len(attribute_value) > max_attribute_size:
@@ -903,7 +909,8 @@ class Server(EventEmitter):
 
         self.send_response(connection, response)
 
-    def on_att_write_request(self, connection, request):
+    @AsyncRunner.run_in_task()
+    async def on_att_write_request(self, connection, request):
         '''
         See Bluetooth spec Vol 3, Part F - 3.4.5.1 Write Request
         '''
@@ -936,12 +943,13 @@ class Server(EventEmitter):
             return
 
         # Accept the value
-        attribute.write_value(connection, request.attribute_value)
+        await attribute.write_value(connection, request.attribute_value)
 
         # Done
         self.send_response(connection, ATT_Write_Response())
 
-    def on_att_write_command(self, connection, request):
+    @AsyncRunner.run_in_task()
+    async def on_att_write_command(self, connection, request):
         '''
         See Bluetooth spec Vol 3, Part F - 3.4.5.3 Write Command
         '''
@@ -959,9 +967,9 @@ class Server(EventEmitter):
 
         # Accept the value
         try:
-            attribute.write_value(connection, request.attribute_value)
+            await attribute.write_value(connection, request.attribute_value)
         except Exception as error:
-            logger.warning(f'!!! ignoring exception: {error}')
+            logger.exception(f'!!! ignoring exception: {error}')
 
     def on_att_handle_value_confirmation(self, connection, _confirmation):
         '''

bumble/helpers.py

@@ -18,10 +18,17 @@
 from __future__ import annotations
 
 from collections.abc import Callable, MutableMapping
-from typing import cast, Any
+import datetime
+from typing import cast, Any, Optional
 import logging
 
+from bumble import avc
+from bumble import avctp
 from bumble import avdtp
+from bumble import avrcp
+from bumble import crypto
+from bumble import rfcomm
+from bumble import sdp
 from bumble.colors import color
 from bumble.att import ATT_CID, ATT_PDU
 from bumble.smp import SMP_CID, SMP_Command
@@ -37,6 +44,7 @@ from bumble.l2cap import (
     L2CAP_Connection_Response,
 )
 from bumble.hci import (
+    Address,
     HCI_EVENT_PACKET,
     HCI_ACL_DATA_PACKET,
     HCI_DISCONNECTION_COMPLETE_EVENT,
@@ -46,8 +54,7 @@ from bumble.hci import (
     HCI_AclDataPacket,
     HCI_Disconnection_Complete_Event,
 )
-from bumble.rfcomm import RFCOMM_Frame, RFCOMM_PSM
+
-from bumble.sdp import SDP_PDU, SDP_PSM
 
 # -----------------------------------------------------------------------------
 # Logging
@@ -57,28 +64,36 @@ logger = logging.getLogger(__name__)
 
 # -----------------------------------------------------------------------------
 PSM_NAMES = {
-    RFCOMM_PSM: 'RFCOMM',
+    rfcomm.RFCOMM_PSM: 'RFCOMM',
-    SDP_PSM: 'SDP',
+    sdp.SDP_PSM: 'SDP',
     avdtp.AVDTP_PSM: 'AVDTP',
+    avctp.AVCTP_PSM: 'AVCTP',
+    # TODO: add more PSM values
 }
 
+AVCTP_PID_NAMES = {avrcp.AVRCP_PID: 'AVRCP'}
+
 
 # -----------------------------------------------------------------------------
 class PacketTracer:
     class AclStream:
         psms: MutableMapping[int, int]
-        peer: PacketTracer.AclStream
+        peer: Optional[PacketTracer.AclStream]
         avdtp_assemblers: MutableMapping[int, avdtp.MessageAssembler]
+        avctp_assemblers: MutableMapping[int, avctp.MessageAssembler]
 
         def __init__(self, analyzer: PacketTracer.Analyzer) -> None:
             self.analyzer = analyzer
             self.packet_assembler = HCI_AclDataPacketAssembler(self.on_acl_pdu)
             self.avdtp_assemblers = {}  # AVDTP assemblers, by source_cid
+            self.avctp_assemblers = {}  # AVCTP assemblers, by source_cid
             self.psms = {}  # PSM, by source_cid
+            self.peer = None
 
         # pylint: disable=too-many-nested-blocks
         def on_acl_pdu(self, pdu: bytes) -> None:
             l2cap_pdu = L2CAP_PDU.from_bytes(pdu)
+            self.analyzer.emit(l2cap_pdu)
 
             if l2cap_pdu.cid == ATT_CID:
                 att_pdu = ATT_PDU.from_bytes(l2cap_pdu.payload)
@@ -100,9 +115,8 @@ class PacketTracer:
                         connection_response.result
                         == L2CAP_Connection_Response.CONNECTION_SUCCESSFUL
                     ):
-                        if self.peer:
+                        if self.peer and (
-                            if psm := self.peer.psms.get(
+                            psm := self.peer.psms.get(connection_response.source_cid)
-                                connection_response.source_cid
                         ):
                             # Found a pending connection
                             self.psms[connection_response.destination_cid] = psm
@@ -115,27 +129,37 @@ class PacketTracer:
                                 ] = avdtp.MessageAssembler(self.on_avdtp_message)
                                 self.peer.avdtp_assemblers[
                                     connection_response.destination_cid
-                                    ] = avdtp.MessageAssembler(
+                                ] = avdtp.MessageAssembler(self.peer.on_avdtp_message)
-                                        self.peer.on_avdtp_message
+                            elif psm == avctp.AVCTP_PSM:
-                                    )
+                                self.avctp_assemblers[
-
+                                    connection_response.source_cid
+                                ] = avctp.MessageAssembler(self.on_avctp_message)
+                                self.peer.avctp_assemblers[
+                                    connection_response.destination_cid
+                                ] = avctp.MessageAssembler(self.peer.on_avctp_message)
             else:
                 # Try to find the PSM associated with this PDU
                 if self.peer and (psm := self.peer.psms.get(l2cap_pdu.cid)):
-                    if psm == SDP_PSM:
+                    if psm == sdp.SDP_PSM:
-                        sdp_pdu = SDP_PDU.from_bytes(l2cap_pdu.payload)
+                        sdp_pdu = sdp.SDP_PDU.from_bytes(l2cap_pdu.payload)
                         self.analyzer.emit(sdp_pdu)
-                    elif psm == RFCOMM_PSM:
+                    elif psm == rfcomm.RFCOMM_PSM:
-                        rfcomm_frame = RFCOMM_Frame.from_bytes(l2cap_pdu.payload)
+                        rfcomm_frame = rfcomm.RFCOMM_Frame.from_bytes(l2cap_pdu.payload)
                         self.analyzer.emit(rfcomm_frame)
                     elif psm == avdtp.AVDTP_PSM:
                         self.analyzer.emit(
                             f'{color("L2CAP", "green")} [CID={l2cap_pdu.cid}, '
                             f'PSM=AVDTP]: {l2cap_pdu.payload.hex()}'
                         )
-                        assembler = self.avdtp_assemblers.get(l2cap_pdu.cid)
+                        if avdtp_assembler := self.avdtp_assemblers.get(l2cap_pdu.cid):
-                        if assembler:
+                            avdtp_assembler.on_pdu(l2cap_pdu.payload)
-                            assembler.on_pdu(l2cap_pdu.payload)
+                    elif psm == avctp.AVCTP_PSM:
+                        self.analyzer.emit(
+                            f'{color("L2CAP", "green")} [CID={l2cap_pdu.cid}, '
+                            f'PSM=AVCTP]: {l2cap_pdu.payload.hex()}'
+                        )
+                        if avctp_assembler := self.avctp_assemblers.get(l2cap_pdu.cid):
+                            avctp_assembler.on_pdu(l2cap_pdu.payload)
                     else:
                         psm_string = name_or_number(PSM_NAMES, psm)
                         self.analyzer.emit(
@@ -152,6 +176,28 @@ class PacketTracer:
                 f'{color("AVDTP", "green")} [{transaction_label}] {message}'
             )
 
+        def on_avctp_message(
+            self,
+            transaction_label: int,
+            is_command: bool,
+            ipid: bool,
+            pid: int,
+            payload: bytes,
+        ):
+            if pid == avrcp.AVRCP_PID:
+                avc_frame = avc.Frame.from_bytes(payload)
+                details = str(avc_frame)
+            else:
+                details = payload.hex()
+
+            c_r = 'Command' if is_command else 'Response'
+            self.analyzer.emit(
+                f'{color("AVCTP", "green")} '
+                f'{c_r}[{transaction_label}][{name_or_number(AVCTP_PID_NAMES, pid)}] '
+                f'{"#" if ipid else ""}'
+                f'{details}'
+            )
+
         def feed_packet(self, packet: HCI_AclDataPacket) -> None:
             self.packet_assembler.feed_packet(packet)
 
@@ -163,6 +209,7 @@ class PacketTracer:
             self.label = label
             self.emit_message = emit_message
             self.acl_streams = {}  # ACL streams, by connection handle
+            self.packet_timestamp: Optional[datetime.datetime] = None
 
         def start_acl_stream(self, connection_handle: int) -> PacketTracer.AclStream:
             logger.info(
@@ -190,7 +237,10 @@ class PacketTracer:
                 # Let the other forwarder know so it can cleanup its stream as well
                 self.peer.end_acl_stream(connection_handle)
 
-        def on_packet(self, packet: HCI_Packet) -> None:
+        def on_packet(
+            self, timestamp: Optional[datetime.datetime], packet: HCI_Packet
+        ) -> None:
+            self.packet_timestamp = timestamp
             self.emit(packet)
 
             if packet.hci_packet_type == HCI_ACL_DATA_PACKET:
@@ -210,13 +260,22 @@ class PacketTracer:
                     )
 
         def emit(self, message: Any) -> None:
-            self.emit_message(f'[{self.label}] {message}')
+            if self.packet_timestamp:
-
+                prefix = f"[{self.packet_timestamp.strftime('%Y-%m-%d %H:%M:%S.%f')}]"
-    def trace(self, packet: HCI_Packet, direction: int = 0) -> None:
-        if direction == 0:
-            self.host_to_controller_analyzer.on_packet(packet)
             else:
-            self.controller_to_host_analyzer.on_packet(packet)
+                prefix = ""
+            self.emit_message(f'{prefix}[{self.label}] {message}')
+
+    def trace(
+        self,
+        packet: HCI_Packet,
+        direction: int = 0,
+        timestamp: Optional[datetime.datetime] = None,
+    ) -> None:
+        if direction == 0:
+            self.host_to_controller_analyzer.on_packet(timestamp, packet)
+        else:
+            self.controller_to_host_analyzer.on_packet(timestamp, packet)
 
     def __init__(
         self,
@@ -232,3 +291,15 @@ class PacketTracer:
         )
         self.host_to_controller_analyzer.peer = self.controller_to_host_analyzer
         self.controller_to_host_analyzer.peer = self.host_to_controller_analyzer
+
+
+def generate_irk() -> bytes:
+    return crypto.r()
+
+
+def verify_rpa_with_irk(rpa: Address, irk: bytes) -> bool:
+    rpa_bytes = bytes(rpa)
+    prand_given = rpa_bytes[3:]
+    hash_given = rpa_bytes[:3]
+    hash_local = crypto.ah(irk, prand_given)
+    return hash_local[:3] == hash_given

bumble/hfp.py

@@ -21,12 +21,11 @@ import asyncio
 import dataclasses
 import enum
 import traceback
-import warnings
+import pyee
-from typing import Dict, List, Union, Set, Any, TYPE_CHECKING
+from typing import Dict, List, Union, Set, Any, Optional, TYPE_CHECKING
-
-from . import at
-from . import rfcomm
 
+from bumble import at
+from bumble import rfcomm
 from bumble.colors import color
 from bumble.core import (
     ProtocolError,
@@ -79,7 +78,6 @@ class HfpProtocol:
     lines_available: asyncio.Event
 
     def __init__(self, dlc: rfcomm.DLC) -> None:
-        warnings.warn("See HfProtocol", DeprecationWarning)
         self.dlc = dlc
         self.buffer = ''
         self.lines = collections.deque()
@@ -128,10 +126,13 @@ class HfpProtocol:
 # -----------------------------------------------------------------------------
 
 
-# HF supported features (AT+BRSF=) (normative).
-# Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07
-# and 3GPP 27.007
 class HfFeature(enum.IntFlag):
+    """
+    HF supported features (AT+BRSF=) (normative).
+
+    Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07 and 3GPP 27.007.
+    """
+
     EC_NR = 0x001  # Echo Cancel & Noise reduction
     THREE_WAY_CALLING = 0x002
     CLI_PRESENTATION_CAPABILITY = 0x004
@@ -146,10 +147,13 @@ class HfFeature(enum.IntFlag):
     VOICE_RECOGNITION_TEST = 0x800
 
 
-# AG supported features (+BRSF:) (normative).
-# Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07
-# and 3GPP 27.007
 class AgFeature(enum.IntFlag):
+    """
+    AG supported features (+BRSF:) (normative).
+
+    Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07 and 3GPP 27.007.
+    """
+
     THREE_WAY_CALLING = 0x001
     EC_NR = 0x002  # Echo Cancel & Noise reduction
     VOICE_RECOGNITION_FUNCTION = 0x004
@@ -166,52 +170,90 @@ class AgFeature(enum.IntFlag):
     VOICE_RECOGNITION_TEST = 0x2000
 
 
-# Audio Codec IDs (normative).
-# Hands-Free Profile v1.8, 10 Appendix B
 class AudioCodec(enum.IntEnum):
+    """
+    Audio Codec IDs (normative).
+
+    Hands-Free Profile v1.9, 11 Appendix B
+    """
+
     CVSD = 0x01  # Support for CVSD audio codec
     MSBC = 0x02  # Support for mSBC audio codec
+    LC3_SWB = 0x03  # Support for LC3-SWB audio codec
 
 
-# HF Indicators (normative).
-# Bluetooth Assigned Numbers, 6.10.1 HF Indicators
 class HfIndicator(enum.IntEnum):
+    """
+    HF Indicators (normative).
+
+    Bluetooth Assigned Numbers, 6.10.1 HF Indicators.
+    """
+
     ENHANCED_SAFETY = 0x01  # Enhanced safety feature
     BATTERY_LEVEL = 0x02  # Battery level feature
 
 
-# Call Hold supported operations (normative).
-# AT Commands Reference Guide, 3.5.2.3.12 +CHLD - Call Holding Services
 class CallHoldOperation(enum.IntEnum):
+    """
+    Call Hold supported operations (normative).
+
+    AT Commands Reference Guide, 3.5.2.3.12 +CHLD - Call Holding Services.
+    """
+
     RELEASE_ALL_HELD_CALLS = 0  # Release all held calls
     RELEASE_ALL_ACTIVE_CALLS = 1  # Release all active calls, accept other
     HOLD_ALL_ACTIVE_CALLS = 2  # Place all active calls on hold, accept other
     ADD_HELD_CALL = 3  # Adds a held call to conversation
 
 
-# Response Hold status (normative).
-# Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07
-# and 3GPP 27.007
 class ResponseHoldStatus(enum.IntEnum):
+    """
+    Response Hold status (normative).
+
+    Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07 and 3GPP 27.007.
+    """
+
     INC_CALL_HELD = 0  # Put incoming call on hold
     HELD_CALL_ACC = 1  # Accept a held incoming call
     HELD_CALL_REJ = 2  # Reject a held incoming call
 
 
-# Values for the Call Setup AG indicator (normative).
+class AgIndicator(enum.Enum):
-# Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07
+    """
-# and 3GPP 27.007
+    Values for the AG indicator (normative).
+
+    Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07 and 3GPP 27.007.
+    """
+
+    SERVICE = 'service'
+    CALL = 'call'
+    CALL_SETUP = 'callsetup'
+    CALL_HELD = 'callheld'
+    SIGNAL = 'signal'
+    ROAM = 'roam'
+    BATTERY_CHARGE = 'battchg'
+
+
 class CallSetupAgIndicator(enum.IntEnum):
+    """
+    Values for the Call Setup AG indicator (normative).
+
+    Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07 and 3GPP 27.007.
+    """
+
     NOT_IN_CALL_SETUP = 0
     INCOMING_CALL_PROCESS = 1
     OUTGOING_CALL_SETUP = 2
     REMOTE_ALERTED = 3  # Remote party alerted in an outgoing call
 
 
-# Values for the Call Held AG indicator (normative).
-# Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07
-# and 3GPP 27.007
 class CallHeldAgIndicator(enum.IntEnum):
+    """
+    Values for the Call Held AG indicator (normative).
+
+    Hands-Free Profile v1.8, 4.34.2, AT Capabilities Re-Used from GSM 07.07 and 3GPP 27.007.
+    """
+
     NO_CALLS_HELD = 0
     # Call is placed on hold or active/held calls swapped
     # (The AG has both an active AND a held call)
@@ -219,16 +261,24 @@ class CallHeldAgIndicator(enum.IntEnum):
     CALL_ON_HOLD_NO_ACTIVE_CALL = 2  # Call on hold, no active call
 
 
-# Call Info direction (normative).
-# AT Commands Reference Guide, 3.5.2.3.15 +CLCC - List Current Calls
 class CallInfoDirection(enum.IntEnum):
+    """
+    Call Info direction (normative).
+
+    AT Commands Reference Guide, 3.5.2.3.15 +CLCC - List Current Calls.
+    """
+
     MOBILE_ORIGINATED_CALL = 0
     MOBILE_TERMINATED_CALL = 1
 
 
-# Call Info status (normative).
-# AT Commands Reference Guide, 3.5.2.3.15 +CLCC - List Current Calls
 class CallInfoStatus(enum.IntEnum):
+    """
+    Call Info status (normative).
+
+    AT Commands Reference Guide, 3.5.2.3.15 +CLCC - List Current Calls.
+    """
+
     ACTIVE = 0
     HELD = 1
     DIALING = 2
@@ -237,15 +287,47 @@ class CallInfoStatus(enum.IntEnum):
     WAITING = 5
 
 
-# Call Info mode (normative).
-# AT Commands Reference Guide, 3.5.2.3.15 +CLCC - List Current Calls
 class CallInfoMode(enum.IntEnum):
+    """
+    Call Info mode (normative).
+
+    AT Commands Reference Guide, 3.5.2.3.15 +CLCC - List Current Calls.
+    """
+
     VOICE = 0
     DATA = 1
     FAX = 2
     UNKNOWN = 9
 
 
+class CallInfoMultiParty(enum.IntEnum):
+    """
+    Call Info Multi-Party state (normative).
+
+    AT Commands Reference Guide, 3.5.2.3.15 +CLCC - List Current Calls.
+    """
+
+    NOT_IN_CONFERENCE = 0
+    IN_CONFERENCE = 1
+
+
+@dataclasses.dataclass
+class CallInfo:
+    """
+    Enhanced call status.
+
+    AT Commands Reference Guide, 3.5.2.3.15 +CLCC - List Current Calls.
+    """
+
+    index: int
+    direction: CallInfoDirection
+    status: CallInfoStatus
+    mode: CallInfoMode
+    multi_party: CallInfoMultiParty
+    number: Optional[int] = None
+    type: Optional[int] = None
+
+
 # -----------------------------------------------------------------------------
 # Hands-Free Control Interoperability Requirements
 # -----------------------------------------------------------------------------
@@ -326,8 +408,9 @@ class Configuration:
 
 
 class AtResponseType(enum.Enum):
-    """Indicate if a response is expected from an AT command, and if multiple
+    """
-    responses are accepted."""
+    Indicates if a response is expected from an AT command, and if multiple responses are accepted.
+    """
 
     NONE = 0
     SINGLE = 1
@@ -361,9 +444,20 @@ class HfIndicatorState:
     enabled: bool = False
 
 
-class HfProtocol:
+class HfProtocol(pyee.EventEmitter):
-    """Implementation for the Hands-Free side of the Hands-Free profile.
+    """
-    Reference specification Hands-Free Profile v1.8"""
+    Implementation for the Hands-Free side of the Hands-Free profile.
+
+    Reference specification Hands-Free Profile v1.8.
+
+    Emitted events:
+        codec_negotiation: When codec is renegotiated, notify the new codec.
+            Args:
+                active_codec: AudioCodec
+        ag_indicator: When AG update their indicators, notify the new state.
+            Args:
+                ag_indicator: AgIndicator
+    """
 
     supported_hf_features: int
     supported_audio_codecs: List[AudioCodec]
@@ -383,14 +477,18 @@ class HfProtocol:
         response_queue: asyncio.Queue
         unsolicited_queue: asyncio.Queue
     read_buffer: bytearray
+    active_codec: AudioCodec
+
+    def __init__(self, dlc: rfcomm.DLC, configuration: Configuration) -> None:
+        super().__init__()
 
-    def __init__(self, dlc: rfcomm.DLC, configuration: Configuration):
         # Configure internal state.
         self.dlc = dlc
         self.command_lock = asyncio.Lock()
         self.response_queue = asyncio.Queue()
         self.unsolicited_queue = asyncio.Queue()
         self.read_buffer = bytearray()
+        self.active_codec = AudioCodec.CVSD
 
         # Build local features.
         self.supported_hf_features = sum(configuration.supported_hf_features)
@@ -415,10 +513,12 @@ class HfProtocol:
     def supports_ag_feature(self, feature: AgFeature) -> bool:
         return (self.supported_ag_features & feature) != 0
 
-    # Read AT messages from the RFCOMM channel.
-    # Enqueue AT commands, responses, unsolicited responses to their
-    # respective queues, and set the corresponding event.
     def _read_at(self, data: bytes):
+        """
+        Reads AT messages from the RFCOMM channel.
+
+        Enqueues AT commands, responses, unsolicited responses to their respective queues, and set the corresponding event.
+        """
         # Append to the read buffer.
         self.read_buffer.extend(data)
 
@@ -446,17 +546,25 @@ class HfProtocol:
         else:
             logger.warning(f"dropping unexpected response with code '{response.code}'")
 
-    # Send an AT command and wait for the peer response.
-    # Wait for the AT responses sent by the peer, to the status code.
-    # Raises asyncio.TimeoutError if the status is not received
-    # after a timeout (default 1 second).
-    # Raises ProtocolError if the status is not OK.
     async def execute_command(
         self,
         cmd: str,
         timeout: float = 1.0,
         response_type: AtResponseType = AtResponseType.NONE,
     ) -> Union[None, AtResponse, List[AtResponse]]:
+        """
+        Sends an AT command and wait for the peer response.
+        Wait for the AT responses sent by the peer, to the status code.
+
+        Args:
+            cmd: the AT command in string to execute.
+            timeout: timeout in float seconds.
+            response_type: type of response.
+
+        Raises:
+            asyncio.TimeoutError: the status is not received after a timeout (default 1 second).
+            ProtocolError: the status is not OK.
+        """
         async with self.command_lock:
             logger.debug(f">>> {cmd}")
             self.dlc.write(cmd + '\r')
@@ -479,8 +587,9 @@ class HfProtocol:
                     raise HfpProtocolError(result.code)
                 responses.append(result)
 
-    # 4.2.1 Service Level Connection Initialization.
     async def initiate_slc(self):
+        """4.2.1 Service Level Connection Initialization."""
+
         # 4.2.1.1 Supported features exchange
         # First, in the initialization procedure, the HF shall send the
         # AT+BRSF=<HF supported features> command to the AG to both notify
@@ -620,16 +729,17 @@ class HfProtocol:
 
         logger.info("SLC setup completed")
 
-    # 4.11.2 Audio Connection Setup by HF
     async def setup_audio_connection(self):
+        """4.11.2 Audio Connection Setup by HF."""
+
         # When the HF triggers the establishment of the Codec Connection it
         # shall send the AT command AT+BCC to the AG. The AG shall respond with
         # OK if it will start the Codec Connection procedure, and with ERROR
         # if it cannot start the Codec Connection procedure.
         await self.execute_command("AT+BCC")
 
-    # 4.11.3 Codec Connection Setup
     async def setup_codec_connection(self, codec_id: int):
+        """4.11.3 Codec Connection Setup."""
         # The AG shall send a +BCS=<Codec ID> unsolicited response to the HF.
         # The HF shall then respond to the incoming unsolicited response with
         # the AT command AT+BCS=<Codec ID>. The ID shall be the same as in the
@@ -647,27 +757,29 @@ class HfProtocol:
         # Synchronous Connection with the settings that are determined by the
         # ID. The HF shall be ready to accept the synchronous connection
         # establishment as soon as it has sent the AT commands AT+BCS=<Codec ID>.
+        self.active_codec = AudioCodec(codec_id)
+        self.emit('codec_negotiation', self.active_codec)
 
         logger.info("codec connection setup completed")
 
-    # 4.13.1 Answer Incoming Call from the HF – In-Band Ringing
     async def answer_incoming_call(self):
+        """4.13.1 Answer Incoming Call from the HF - In-Band Ringing."""
         # The user accepts the incoming voice call by using the proper means
         # provided by the HF. The HF shall then send the ATA command
         # (see Section 4.34) to the AG. The AG shall then begin the procedure for
         # accepting the incoming call.
         await self.execute_command("ATA")
 
-    # 4.14.1 Reject an Incoming Call from the HF
     async def reject_incoming_call(self):
+        """4.14.1 Reject an Incoming Call from the HF."""
         # The user rejects the incoming call by using the User Interface on the
         # Hands-Free unit. The HF shall then send the AT+CHUP command
         # (see Section 4.34) to the AG. This may happen at any time during the
         # procedures described in Sections 4.13.1 and 4.13.2.
         await self.execute_command("AT+CHUP")
 
-    # 4.15.1 Terminate a Call Process from the HF
     async def terminate_call(self):
+        """4.15.1 Terminate a Call Process from the HF."""
         # The user may abort the ongoing call process using whatever means
         # provided by the Hands-Free unit. The HF shall send AT+CHUP command
         # (see Section 4.34) to the AG, and the AG shall then start the
@@ -676,8 +788,35 @@ class HfProtocol:
         # code, with the value indicating (call=0).
         await self.execute_command("AT+CHUP")
 
+    async def query_current_calls(self) -> List[CallInfo]:
+        """4.32.1 Query List of Current Calls in AG.
+
+        Return:
+            List of current calls in AG.
+        """
+        responses = await self.execute_command(
+            "AT+CLCC", response_type=AtResponseType.MULTIPLE
+        )
+        assert isinstance(responses, list)
+
+        calls = []
+        for response in responses:
+            call_info = CallInfo(
+                index=int(response.parameters[0]),
+                direction=CallInfoDirection(int(response.parameters[1])),
+                status=CallInfoStatus(int(response.parameters[2])),
+                mode=CallInfoMode(int(response.parameters[3])),
+                multi_party=CallInfoMultiParty(int(response.parameters[4])),
+            )
+            if len(response.parameters) >= 7:
+                call_info.number = int(response.parameters[5])
+                call_info.type = int(response.parameters[6])
+            calls.append(call_info)
+        return calls
+
     async def update_ag_indicator(self, index: int, value: int):
         self.ag_indicators[index].current_status = value
+        self.emit('ag_indicator', self.ag_indicators[index])
         logger.info(
             f"AG indicator updated: {self.ag_indicators[index].description}, {value}"
         )
@@ -695,9 +834,11 @@ class HfProtocol:
             logging.info(f"unhandled unsolicited response {result.code}")
 
     async def run(self):
-        """Main rountine for the Hands-Free side of the HFP protocol.
+        """
-        Initiates the service level connection then loops handling
+        Main routine for the Hands-Free side of the HFP protocol.
-        unsolicited AG responses."""
+
+        Initiates the service level connection then loops handling unsolicited AG responses.
+        """
 
         try:
             await self.initiate_slc()
@@ -713,9 +854,13 @@ class HfProtocol:
 # -----------------------------------------------------------------------------
 
 
-# Profile version (normative).
-# Hands-Free Profile v1.8, 5.3 SDP Interoperability Requirements
 class ProfileVersion(enum.IntEnum):
+    """
+    Profile version (normative).
+
+    Hands-Free Profile v1.8, 5.3 SDP Interoperability Requirements.
+    """
+
     V1_5 = 0x0105
     V1_6 = 0x0106
     V1_7 = 0x0107
@@ -723,9 +868,13 @@ class ProfileVersion(enum.IntEnum):
     V1_9 = 0x0109
 
 
-# HF supported features (normative).
-# Hands-Free Profile v1.8, 5.3 SDP Interoperability Requirements
 class HfSdpFeature(enum.IntFlag):
+    """
+    HF supported features (normative).
+
+    Hands-Free Profile v1.8, 5.3 SDP Interoperability Requirements.
+    """
+
     EC_NR = 0x01  # Echo Cancel & Noise reduction
     THREE_WAY_CALLING = 0x02
     CLI_PRESENTATION_CAPABILITY = 0x04
@@ -736,9 +885,13 @@ class HfSdpFeature(enum.IntFlag):
     VOICE_RECOGNITION_TEST = 0x80
 
 
-# AG supported features (normative).
-# Hands-Free Profile v1.8, 5.3 SDP Interoperability Requirements
 class AgSdpFeature(enum.IntFlag):
+    """
+    AG supported features (normative).
+
+    Hands-Free Profile v1.8, 5.3 SDP Interoperability Requirements.
+    """
+
     THREE_WAY_CALLING = 0x01
     EC_NR = 0x02  # Echo Cancel & Noise reduction
     VOICE_RECOGNITION_FUNCTION = 0x04
@@ -752,9 +905,12 @@ class AgSdpFeature(enum.IntFlag):
 def sdp_records(
     service_record_handle: int, rfcomm_channel: int, configuration: Configuration
 ) -> List[ServiceAttribute]:
-    """Generate the SDP record for HFP Hands-Free support.
+    """
+    Generates the SDP record for HFP Hands-Free support.
+
     The record exposes the features supported in the input configuration,
-    and the allocated RFCOMM channel."""
+    and the allocated RFCOMM channel.
+    """
 
     hf_supported_features = 0
 

bumble/hid.py

@@ -19,16 +19,17 @@ from __future__ import annotations
 from dataclasses import dataclass
 import logging
 import enum
+import struct
 
+from abc import ABC, abstractmethod
 from pyee import EventEmitter
-from typing import Optional, TYPE_CHECKING
+from typing import Optional, Callable, TYPE_CHECKING
+from typing_extensions import override
 
-from bumble import l2cap
+from bumble import l2cap, device
 from bumble.colors import color
 from bumble.core import InvalidStateError, ProtocolError
-
+from .hci import Address
-if TYPE_CHECKING:
-    from bumble.device import Device, Connection
 
 
 # -----------------------------------------------------------------------------
@@ -60,6 +61,7 @@ class Message:
         NOT_READY = 0x01
         ERR_INVALID_REPORT_ID = 0x02
         ERR_UNSUPPORTED_REQUEST = 0x03
+        ERR_INVALID_PARAMETER = 0x04
         ERR_UNKNOWN = 0x0E
         ERR_FATAL = 0x0F
 
@@ -101,13 +103,14 @@ class GetReportMessage(Message):
     def __bytes__(self) -> bytes:
         packet_bytes = bytearray()
         packet_bytes.append(self.report_id)
-        packet_bytes.extend(
+        if self.buffer_size == 0:
-            [(self.buffer_size & 0xFF), ((self.buffer_size >> 8) & 0xFF)]
-        )
-        if self.report_type == Message.ReportType.OTHER_REPORT:
             return self.header(self.report_type) + packet_bytes
         else:
-            return self.header(0x08 | self.report_type) + packet_bytes
+            return (
+                self.header(0x08 | self.report_type)
+                + packet_bytes
+                + struct.pack("<H", self.buffer_size)
+            )
 
 
 @dataclass
@@ -120,6 +123,16 @@ class SetReportMessage(Message):
         return self.header(self.report_type) + self.data
 
 
+@dataclass
+class SendControlData(Message):
+    report_type: int
+    data: bytes
+    message_type = Message.MessageType.DATA
+
+    def __bytes__(self) -> bytes:
+        return self.header(self.report_type) + self.data
+
+
 @dataclass
 class GetProtocolMessage(Message):
     message_type = Message.MessageType.GET_PROTOCOL
@@ -161,31 +174,47 @@ class VirtualCableUnplug(Message):
         return self.header(Message.ControlCommand.VIRTUAL_CABLE_UNPLUG)
 
 
+# Device sends input report, host sends output report.
 @dataclass
 class SendData(Message):
     data: bytes
+    report_type: int
     message_type = Message.MessageType.DATA
 
     def __bytes__(self) -> bytes:
-        return self.header(Message.ReportType.OUTPUT_REPORT) + self.data
+        return self.header(self.report_type) + self.data
+
+
+@dataclass
+class SendHandshakeMessage(Message):
+    result_code: int
+    message_type = Message.MessageType.HANDSHAKE
+
+    def __bytes__(self) -> bytes:
+        return self.header(self.result_code)
 
 
 # -----------------------------------------------------------------------------
-class Host(EventEmitter):
+class HID(ABC, EventEmitter):
-    l2cap_ctrl_channel: Optional[l2cap.ClassicChannel]
+    l2cap_ctrl_channel: Optional[l2cap.ClassicChannel] = None
-    l2cap_intr_channel: Optional[l2cap.ClassicChannel]
+    l2cap_intr_channel: Optional[l2cap.ClassicChannel] = None
+    connection: Optional[device.Connection] = None
 
-    def __init__(self, device: Device, connection: Connection) -> None:
+    class Role(enum.IntEnum):
+        HOST = 0x00
+        DEVICE = 0x01
+
+    def __init__(self, device: device.Device, role: Role) -> None:
         super().__init__()
+        self.remote_device_bd_address: Optional[Address] = None
         self.device = device
-        self.connection = connection
+        self.role = role
-
-        self.l2cap_ctrl_channel = None
-        self.l2cap_intr_channel = None
 
         # Register ourselves with the L2CAP channel manager
-        device.register_l2cap_server(HID_CONTROL_PSM, self.on_connection)
+        device.register_l2cap_server(HID_CONTROL_PSM, self.on_l2cap_connection)
-        device.register_l2cap_server(HID_INTERRUPT_PSM, self.on_connection)
+        device.register_l2cap_server(HID_INTERRUPT_PSM, self.on_l2cap_connection)
+
+        device.on('connection', self.on_device_connection)
 
     async def connect_control_channel(self) -> None:
         # Create a new L2CAP connection - control channel
@@ -229,9 +258,18 @@ class Host(EventEmitter):
         self.l2cap_ctrl_channel = None
         await channel.disconnect()
 
-    def on_connection(self, l2cap_channel: l2cap.ClassicChannel) -> None:
+    def on_device_connection(self, connection: device.Connection) -> None:
+        self.connection = connection
+        self.remote_device_bd_address = connection.peer_address
+        connection.on('disconnection', self.on_device_disconnection)
+
+    def on_device_disconnection(self, reason: int) -> None:
+        self.connection = None
+
+    def on_l2cap_connection(self, l2cap_channel: l2cap.ClassicChannel) -> None:
         logger.debug(f'+++ New L2CAP connection: {l2cap_channel}')
         l2cap_channel.on('open', lambda: self.on_l2cap_channel_open(l2cap_channel))
+        l2cap_channel.on('close', lambda: self.on_l2cap_channel_close(l2cap_channel))
 
     def on_l2cap_channel_open(self, l2cap_channel: l2cap.ClassicChannel) -> None:
         if l2cap_channel.psm == HID_CONTROL_PSM:
@@ -242,63 +280,20 @@ class Host(EventEmitter):
             self.l2cap_intr_channel.sink = self.on_intr_pdu
         logger.debug(f'$$$ L2CAP channel open: {l2cap_channel}')
 
-    def on_ctrl_pdu(self, pdu: bytes) -> None:
+    def on_l2cap_channel_close(self, l2cap_channel: l2cap.ClassicChannel) -> None:
-        logger.debug(f'<<< HID CONTROL PDU: {pdu.hex()}')
+        if l2cap_channel.psm == HID_CONTROL_PSM:
-        # Here we will receive all kinds of packets, parse and then call respective callbacks
+            self.l2cap_ctrl_channel = None
-        message_type = pdu[0] >> 4
+        else:
-        param = pdu[0] & 0x0F
+            self.l2cap_intr_channel = None
+        logger.debug(f'$$$ L2CAP channel close: {l2cap_channel}')
 
-        if message_type == Message.MessageType.HANDSHAKE:
+    @abstractmethod
-            logger.debug(f'<<< HID HANDSHAKE: {Message.Handshake(param).name}')
+    def on_ctrl_pdu(self, pdu: bytes) -> None:
-            self.emit('handshake', Message.Handshake(param))
+        pass
-        elif message_type == Message.MessageType.DATA:
-            logger.debug('<<< HID CONTROL DATA')
-            self.emit('data', pdu)
-        elif message_type == Message.MessageType.CONTROL:
-            if param == Message.ControlCommand.SUSPEND:
-                logger.debug('<<< HID SUSPEND')
-                self.emit('suspend', pdu)
-            elif param == Message.ControlCommand.EXIT_SUSPEND:
-                logger.debug('<<< HID EXIT SUSPEND')
-                self.emit('exit_suspend', pdu)
-            elif param == Message.ControlCommand.VIRTUAL_CABLE_UNPLUG:
-                logger.debug('<<< HID VIRTUAL CABLE UNPLUG')
-                self.emit('virtual_cable_unplug')
-            else:
-                logger.debug('<<< HID CONTROL OPERATION UNSUPPORTED')
-        else:
-            logger.debug('<<< HID CONTROL DATA')
-            self.emit('data', pdu)
 
     def on_intr_pdu(self, pdu: bytes) -> None:
         logger.debug(f'<<< HID INTERRUPT PDU: {pdu.hex()}')
-        self.emit("data", pdu)
+        self.emit("interrupt_data", pdu)
-
-    def get_report(self, report_type: int, report_id: int, buffer_size: int) -> None:
-        msg = GetReportMessage(
-            report_type=report_type, report_id=report_id, buffer_size=buffer_size
-        )
-        hid_message = bytes(msg)
-        logger.debug(f'>>> HID CONTROL GET REPORT, PDU: {hid_message.hex()}')
-        self.send_pdu_on_ctrl(hid_message)
-
-    def set_report(self, report_type: int, data: bytes):
-        msg = SetReportMessage(report_type=report_type, data=data)
-        hid_message = bytes(msg)
-        logger.debug(f'>>> HID CONTROL SET REPORT, PDU:{hid_message.hex()}')
-        self.send_pdu_on_ctrl(hid_message)
-
-    def get_protocol(self):
-        msg = GetProtocolMessage()
-        hid_message = bytes(msg)
-        logger.debug(f'>>> HID CONTROL GET PROTOCOL, PDU: {hid_message.hex()}')
-        self.send_pdu_on_ctrl(hid_message)
-
-    def set_protocol(self, protocol_mode: int):
-        msg = SetProtocolMessage(protocol_mode=protocol_mode)
-        hid_message = bytes(msg)
-        logger.debug(f'>>> HID CONTROL SET PROTOCOL, PDU: {hid_message.hex()}')
-        self.send_pdu_on_ctrl(hid_message)
 
     def send_pdu_on_ctrl(self, msg: bytes) -> None:
         assert self.l2cap_ctrl_channel
@@ -308,26 +303,252 @@ class Host(EventEmitter):
         assert self.l2cap_intr_channel
         self.l2cap_intr_channel.send_pdu(msg)
 
-    def send_data(self, data):
+    def send_data(self, data: bytes) -> None:
-        msg = SendData(data)
+        if self.role == HID.Role.HOST:
+            report_type = Message.ReportType.OUTPUT_REPORT
+        else:
+            report_type = Message.ReportType.INPUT_REPORT
+        msg = SendData(data, report_type)
         hid_message = bytes(msg)
+        if self.l2cap_intr_channel is not None:
             logger.debug(f'>>> HID INTERRUPT SEND DATA, PDU: {hid_message.hex()}')
             self.send_pdu_on_intr(hid_message)
 
-    def suspend(self):
+    def virtual_cable_unplug(self) -> None:
-        msg = Suspend()
-        hid_message = bytes(msg)
-        logger.debug(f'>>> HID CONTROL SUSPEND, PDU:{hid_message.hex()}')
-        self.send_pdu_on_ctrl(msg)
-
-    def exit_suspend(self):
-        msg = ExitSuspend()
-        hid_message = bytes(msg)
-        logger.debug(f'>>> HID CONTROL EXIT SUSPEND, PDU:{hid_message.hex()}')
-        self.send_pdu_on_ctrl(msg)
-
-    def virtual_cable_unplug(self):
         msg = VirtualCableUnplug()
         hid_message = bytes(msg)
         logger.debug(f'>>> HID CONTROL VIRTUAL CABLE UNPLUG, PDU: {hid_message.hex()}')
-        self.send_pdu_on_ctrl(msg)
+        self.send_pdu_on_ctrl(hid_message)
+
+
+# -----------------------------------------------------------------------------
+
+
+class Device(HID):
+    class GetSetReturn(enum.IntEnum):
+        FAILURE = 0x00
+        REPORT_ID_NOT_FOUND = 0x01
+        ERR_UNSUPPORTED_REQUEST = 0x02
+        ERR_UNKNOWN = 0x03
+        ERR_INVALID_PARAMETER = 0x04
+        SUCCESS = 0xFF
+
+    class GetSetStatus:
+        def __init__(self) -> None:
+            self.data = bytearray()
+            self.status = 0
+
+    def __init__(self, device: device.Device) -> None:
+        super().__init__(device, HID.Role.DEVICE)
+        get_report_cb: Optional[Callable[[int, int, int], None]] = None
+        set_report_cb: Optional[Callable[[int, int, int, bytes], None]] = None
+        get_protocol_cb: Optional[Callable[[], None]] = None
+        set_protocol_cb: Optional[Callable[[int], None]] = None
+
+    @override
+    def on_ctrl_pdu(self, pdu: bytes) -> None:
+        logger.debug(f'<<< HID CONTROL PDU: {pdu.hex()}')
+        param = pdu[0] & 0x0F
+        message_type = pdu[0] >> 4
+
+        if message_type == Message.MessageType.GET_REPORT:
+            logger.debug('<<< HID GET REPORT')
+            self.handle_get_report(pdu)
+        elif message_type == Message.MessageType.SET_REPORT:
+            logger.debug('<<< HID SET REPORT')
+            self.handle_set_report(pdu)
+        elif message_type == Message.MessageType.GET_PROTOCOL:
+            logger.debug('<<< HID GET PROTOCOL')
+            self.handle_get_protocol(pdu)
+        elif message_type == Message.MessageType.SET_PROTOCOL:
+            logger.debug('<<< HID SET PROTOCOL')
+            self.handle_set_protocol(pdu)
+        elif message_type == Message.MessageType.DATA:
+            logger.debug('<<< HID CONTROL DATA')
+            self.emit('control_data', pdu)
+        elif message_type == Message.MessageType.CONTROL:
+            if param == Message.ControlCommand.SUSPEND:
+                logger.debug('<<< HID SUSPEND')
+                self.emit('suspend')
+            elif param == Message.ControlCommand.EXIT_SUSPEND:
+                logger.debug('<<< HID EXIT SUSPEND')
+                self.emit('exit_suspend')
+            elif param == Message.ControlCommand.VIRTUAL_CABLE_UNPLUG:
+                logger.debug('<<< HID VIRTUAL CABLE UNPLUG')
+                self.emit('virtual_cable_unplug')
+            else:
+                logger.debug('<<< HID CONTROL OPERATION UNSUPPORTED')
+        else:
+            logger.debug('<<< HID MESSAGE TYPE UNSUPPORTED')
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+
+    def send_handshake_message(self, result_code: int) -> None:
+        msg = SendHandshakeMessage(result_code)
+        hid_message = bytes(msg)
+        logger.debug(f'>>> HID HANDSHAKE MESSAGE, PDU: {hid_message.hex()}')
+        self.send_pdu_on_ctrl(hid_message)
+
+    def send_control_data(self, report_type: int, data: bytes):
+        msg = SendControlData(report_type=report_type, data=data)
+        hid_message = bytes(msg)
+        logger.debug(f'>>> HID CONTROL DATA: {hid_message.hex()}')
+        self.send_pdu_on_ctrl(hid_message)
+
+    def handle_get_report(self, pdu: bytes):
+        if self.get_report_cb is None:
+            logger.debug("GetReport callback not registered !!")
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+            return
+        report_type = pdu[0] & 0x03
+        buffer_flag = (pdu[0] & 0x08) >> 3
+        report_id = pdu[1]
+        logger.debug(f"buffer_flag: {buffer_flag}")
+        if buffer_flag == 1:
+            buffer_size = (pdu[3] << 8) | pdu[2]
+        else:
+            buffer_size = 0
+
+        ret = self.get_report_cb(report_id, report_type, buffer_size)
+        assert ret is not None
+        if ret.status == self.GetSetReturn.FAILURE:
+            self.send_handshake_message(Message.Handshake.ERR_UNKNOWN)
+        elif ret.status == self.GetSetReturn.SUCCESS:
+            data = bytearray()
+            data.append(report_id)
+            data.extend(ret.data)
+            if len(data) < self.l2cap_ctrl_channel.peer_mtu:  # type: ignore[union-attr]
+                self.send_control_data(report_type=report_type, data=data)
+            else:
+                self.send_handshake_message(Message.Handshake.ERR_INVALID_PARAMETER)
+        elif ret.status == self.GetSetReturn.REPORT_ID_NOT_FOUND:
+            self.send_handshake_message(Message.Handshake.ERR_INVALID_REPORT_ID)
+        elif ret.status == self.GetSetReturn.ERR_INVALID_PARAMETER:
+            self.send_handshake_message(Message.Handshake.ERR_INVALID_PARAMETER)
+        elif ret.status == self.GetSetReturn.ERR_UNSUPPORTED_REQUEST:
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+
+    def register_get_report_cb(self, cb: Callable[[int, int, int], None]) -> None:
+        self.get_report_cb = cb
+        logger.debug("GetReport callback registered successfully")
+
+    def handle_set_report(self, pdu: bytes):
+        if self.set_report_cb is None:
+            logger.debug("SetReport callback not registered !!")
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+            return
+        report_type = pdu[0] & 0x03
+        report_id = pdu[1]
+        report_data = pdu[2:]
+        report_size = len(report_data) + 1
+        ret = self.set_report_cb(report_id, report_type, report_size, report_data)
+        assert ret is not None
+        if ret.status == self.GetSetReturn.SUCCESS:
+            self.send_handshake_message(Message.Handshake.SUCCESSFUL)
+        elif ret.status == self.GetSetReturn.ERR_INVALID_PARAMETER:
+            self.send_handshake_message(Message.Handshake.ERR_INVALID_PARAMETER)
+        elif ret.status == self.GetSetReturn.REPORT_ID_NOT_FOUND:
+            self.send_handshake_message(Message.Handshake.ERR_INVALID_REPORT_ID)
+        else:
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+
+    def register_set_report_cb(
+        self, cb: Callable[[int, int, int, bytes], None]
+    ) -> None:
+        self.set_report_cb = cb
+        logger.debug("SetReport callback registered successfully")
+
+    def handle_get_protocol(self, pdu: bytes):
+        if self.get_protocol_cb is None:
+            logger.debug("GetProtocol callback not registered !!")
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+            return
+        ret = self.get_protocol_cb()
+        assert ret is not None
+        if ret.status == self.GetSetReturn.SUCCESS:
+            self.send_control_data(Message.ReportType.OTHER_REPORT, ret.data)
+        else:
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+
+    def register_get_protocol_cb(self, cb: Callable[[], None]) -> None:
+        self.get_protocol_cb = cb
+        logger.debug("GetProtocol callback registered successfully")
+
+    def handle_set_protocol(self, pdu: bytes):
+        if self.set_protocol_cb is None:
+            logger.debug("SetProtocol callback not registered !!")
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+            return
+        ret = self.set_protocol_cb(pdu[0] & 0x01)
+        assert ret is not None
+        if ret.status == self.GetSetReturn.SUCCESS:
+            self.send_handshake_message(Message.Handshake.SUCCESSFUL)
+        else:
+            self.send_handshake_message(Message.Handshake.ERR_UNSUPPORTED_REQUEST)
+
+    def register_set_protocol_cb(self, cb: Callable[[int], None]) -> None:
+        self.set_protocol_cb = cb
+        logger.debug("SetProtocol callback registered successfully")
+
+
+# -----------------------------------------------------------------------------
+class Host(HID):
+    def __init__(self, device: device.Device) -> None:
+        super().__init__(device, HID.Role.HOST)
+
+    def get_report(self, report_type: int, report_id: int, buffer_size: int) -> None:
+        msg = GetReportMessage(
+            report_type=report_type, report_id=report_id, buffer_size=buffer_size
+        )
+        hid_message = bytes(msg)
+        logger.debug(f'>>> HID CONTROL GET REPORT, PDU: {hid_message.hex()}')
+        self.send_pdu_on_ctrl(hid_message)
+
+    def set_report(self, report_type: int, data: bytes) -> None:
+        msg = SetReportMessage(report_type=report_type, data=data)
+        hid_message = bytes(msg)
+        logger.debug(f'>>> HID CONTROL SET REPORT, PDU:{hid_message.hex()}')
+        self.send_pdu_on_ctrl(hid_message)
+
+    def get_protocol(self) -> None:
+        msg = GetProtocolMessage()
+        hid_message = bytes(msg)
+        logger.debug(f'>>> HID CONTROL GET PROTOCOL, PDU: {hid_message.hex()}')
+        self.send_pdu_on_ctrl(hid_message)
+
+    def set_protocol(self, protocol_mode: int) -> None:
+        msg = SetProtocolMessage(protocol_mode=protocol_mode)
+        hid_message = bytes(msg)
+        logger.debug(f'>>> HID CONTROL SET PROTOCOL, PDU: {hid_message.hex()}')
+        self.send_pdu_on_ctrl(hid_message)
+
+    def suspend(self) -> None:
+        msg = Suspend()
+        hid_message = bytes(msg)
+        logger.debug(f'>>> HID CONTROL SUSPEND, PDU:{hid_message.hex()}')
+        self.send_pdu_on_ctrl(hid_message)
+
+    def exit_suspend(self) -> None:
+        msg = ExitSuspend()
+        hid_message = bytes(msg)
+        logger.debug(f'>>> HID CONTROL EXIT SUSPEND, PDU:{hid_message.hex()}')
+        self.send_pdu_on_ctrl(hid_message)
+
+    @override
+    def on_ctrl_pdu(self, pdu: bytes) -> None:
+        logger.debug(f'<<< HID CONTROL PDU: {pdu.hex()}')
+        param = pdu[0] & 0x0F
+        message_type = pdu[0] >> 4
+        if message_type == Message.MessageType.HANDSHAKE:
+            logger.debug(f'<<< HID HANDSHAKE: {Message.Handshake(param).name}')
+            self.emit('handshake', Message.Handshake(param))
+        elif message_type == Message.MessageType.DATA:
+            logger.debug('<<< HID CONTROL DATA')
+            self.emit('control_data', pdu)
+        elif message_type == Message.MessageType.CONTROL:
+            if param == Message.ControlCommand.VIRTUAL_CABLE_UNPLUG:
+                logger.debug('<<< HID VIRTUAL CABLE UNPLUG')
+                self.emit('virtual_cable_unplug')
+            else:
+                logger.debug('<<< HID CONTROL OPERATION UNSUPPORTED')
+        else:
+            logger.debug('<<< HID MESSAGE TYPE UNSUPPORTED')

bumble/l2cap.py

@@ -149,9 +149,10 @@ L2CAP_INVALID_CID_IN_REQUEST_REASON = 0x0002
 
 L2CAP_LE_CREDIT_BASED_CONNECTION_MAX_CREDITS             = 65535
 L2CAP_LE_CREDIT_BASED_CONNECTION_MIN_MTU                 = 23
+L2CAP_LE_CREDIT_BASED_CONNECTION_MAX_MTU                 = 65535
 L2CAP_LE_CREDIT_BASED_CONNECTION_MIN_MPS                 = 23
 L2CAP_LE_CREDIT_BASED_CONNECTION_MAX_MPS                 = 65533
-L2CAP_LE_CREDIT_BASED_CONNECTION_DEFAULT_MTU             = 2046
+L2CAP_LE_CREDIT_BASED_CONNECTION_DEFAULT_MTU             = 2048
 L2CAP_LE_CREDIT_BASED_CONNECTION_DEFAULT_MPS             = 2048
 L2CAP_LE_CREDIT_BASED_CONNECTION_DEFAULT_INITIAL_CREDITS = 256
 
@@ -172,7 +173,7 @@ L2CAP_MTU_CONFIGURATION_PARAMETER_TYPE = 0x01
 @dataclasses.dataclass
 class ClassicChannelSpec:
     psm: Optional[int] = None
-    mtu: int = L2CAP_MIN_BR_EDR_MTU
+    mtu: int = L2CAP_DEFAULT_MTU
 
 
 @dataclasses.dataclass
@@ -188,8 +189,11 @@ class LeCreditBasedChannelSpec:
             or self.max_credits > L2CAP_LE_CREDIT_BASED_CONNECTION_MAX_CREDITS
         ):
             raise ValueError('max credits out of range')
-        if self.mtu < L2CAP_LE_CREDIT_BASED_CONNECTION_MIN_MTU:
+        if (
-            raise ValueError('MTU too small')
+            self.mtu < L2CAP_LE_CREDIT_BASED_CONNECTION_MIN_MTU
+            or self.mtu > L2CAP_LE_CREDIT_BASED_CONNECTION_MAX_MTU
+        ):
+            raise ValueError('MTU out of range')
         if (
             self.mps < L2CAP_LE_CREDIT_BASED_CONNECTION_MIN_MPS
             or self.mps > L2CAP_LE_CREDIT_BASED_CONNECTION_MAX_MPS
@@ -204,7 +208,7 @@ class L2CAP_PDU:
 
     @staticmethod
     def from_bytes(data: bytes) -> L2CAP_PDU:
-        # Sanity check
+        # Check parameters
         if len(data) < 4:
             raise ValueError('not enough data for L2CAP header')
 
@@ -745,6 +749,8 @@ class ClassicChannel(EventEmitter):
     sink: Optional[Callable[[bytes], Any]]
     state: State
     connection: Connection
+    mtu: int
+    peer_mtu: int
 
     def __init__(
         self,
@@ -761,6 +767,7 @@ class ClassicChannel(EventEmitter):
         self.signaling_cid = signaling_cid
         self.state = self.State.CLOSED
         self.mtu = mtu
+        self.peer_mtu = L2CAP_MIN_BR_EDR_MTU
         self.psm = psm
         self.source_cid = source_cid
         self.destination_cid = 0
@@ -857,7 +864,7 @@ class ClassicChannel(EventEmitter):
             [
                 (
                     L2CAP_MAXIMUM_TRANSMISSION_UNIT_CONFIGURATION_OPTION_TYPE,
-                    struct.pack('<H', L2CAP_DEFAULT_MTU),
+                    struct.pack('<H', self.mtu),
                 )
             ]
         )
@@ -922,8 +929,8 @@ class ClassicChannel(EventEmitter):
         options = L2CAP_Control_Frame.decode_configuration_options(request.options)
         for option in options:
             if option[0] == L2CAP_MTU_CONFIGURATION_PARAMETER_TYPE:
-                self.mtu = struct.unpack('<H', option[1])[0]
+                self.peer_mtu = struct.unpack('<H', option[1])[0]
-                logger.debug(f'MTU = {self.mtu}')
+                logger.debug(f'peer MTU = {self.peer_mtu}')
 
         self.send_control_frame(
             L2CAP_Configure_Response(
@@ -1022,7 +1029,7 @@ class ClassicChannel(EventEmitter):
         return (
             f'Channel({self.source_cid}->{self.destination_cid}, '
             f'PSM={self.psm}, '
-            f'MTU={self.mtu}, '
+            f'MTU={self.mtu}/{self.peer_mtu}, '
             f'state={self.state.name})'
         )
 
@@ -1644,12 +1651,13 @@ class ChannelManager:
 
     def send_pdu(self, connection, cid: int, pdu: Union[SupportsBytes, bytes]) -> None:
         pdu_str = pdu.hex() if isinstance(pdu, bytes) else str(pdu)
+        pdu_bytes = bytes(pdu)
         logger.debug(
             f'{color(">>> Sending L2CAP PDU", "blue")} '
             f'on connection [0x{connection.handle:04X}] (CID={cid}) '
-            f'{connection.peer_address}: {pdu_str}'
+            f'{connection.peer_address}: {len(pdu_bytes)} bytes, {pdu_str}'
         )
-        self.host.send_l2cap_pdu(connection.handle, cid, bytes(pdu))
+        self.host.send_l2cap_pdu(connection.handle, cid, pdu_bytes)
 
     def on_pdu(self, connection: Connection, cid: int, pdu: bytes) -> None:
         if cid in (L2CAP_SIGNALING_CID, L2CAP_LE_SIGNALING_CID):
@@ -1926,7 +1934,7 @@ class ChannelManager:
                     supervision_timeout=request.timeout,
                     min_ce_length=0,
                     max_ce_length=0,
-                )  # type: ignore[call-arg]
+                )
             )
         else:
             self.send_control_frame(

bumble/link.py

@@ -26,9 +26,13 @@ from bumble.hci import (
     HCI_SUCCESS,
     HCI_CONNECTION_ACCEPT_TIMEOUT_ERROR,
     HCI_CONNECTION_TIMEOUT_ERROR,
+    HCI_UNKNOWN_CONNECTION_IDENTIFIER_ERROR,
     HCI_PAGE_TIMEOUT_ERROR,
     HCI_Connection_Complete_Event,
 )
+from bumble import controller
+
+from typing import Optional, Set
 
 # -----------------------------------------------------------------------------
 # Logging
@@ -57,6 +61,8 @@ class LocalLink:
     Link bus for controllers to communicate with each other
     '''
 
+    controllers: Set[controller.Controller]
+
     def __init__(self):
         self.controllers = set()
         self.pending_connection = None
@@ -79,7 +85,9 @@ class LocalLink:
                 return controller
         return None
 
-    def find_classic_controller(self, address):
+    def find_classic_controller(
+        self, address: Address
+    ) -> Optional[controller.Controller]:
         for controller in self.controllers:
             if controller.public_address == address:
                 return controller
@@ -188,6 +196,60 @@ class LocalLink:
         if peripheral_controller := self.find_controller(peripheral_address):
             peripheral_controller.on_link_encrypted(central_address, rand, ediv, ltk)
 
+    def create_cis(
+        self,
+        central_controller: controller.Controller,
+        peripheral_address: Address,
+        cig_id: int,
+        cis_id: int,
+    ) -> None:
+        logger.debug(
+            f'$$$ CIS Request {central_controller.random_address} -> {peripheral_address}'
+        )
+        if peripheral_controller := self.find_controller(peripheral_address):
+            asyncio.get_running_loop().call_soon(
+                peripheral_controller.on_link_cis_request,
+                central_controller.random_address,
+                cig_id,
+                cis_id,
+            )
+
+    def accept_cis(
+        self,
+        peripheral_controller: controller.Controller,
+        central_address: Address,
+        cig_id: int,
+        cis_id: int,
+    ) -> None:
+        logger.debug(
+            f'$$$ CIS Accept {peripheral_controller.random_address} -> {central_address}'
+        )
+        if central_controller := self.find_controller(central_address):
+            asyncio.get_running_loop().call_soon(
+                central_controller.on_link_cis_established, cig_id, cis_id
+            )
+            asyncio.get_running_loop().call_soon(
+                peripheral_controller.on_link_cis_established, cig_id, cis_id
+            )
+
+    def disconnect_cis(
+        self,
+        initiator_controller: controller.Controller,
+        peer_address: Address,
+        cig_id: int,
+        cis_id: int,
+    ) -> None:
+        logger.debug(
+            f'$$$ CIS Disconnect {initiator_controller.random_address} -> {peer_address}'
+        )
+        if peer_controller := self.find_controller(peer_address):
+            asyncio.get_running_loop().call_soon(
+                initiator_controller.on_link_cis_disconnected, cig_id, cis_id
+            )
+            asyncio.get_running_loop().call_soon(
+                peer_controller.on_link_cis_disconnected, cig_id, cis_id
+            )
+
     ############################################################
     # Classic handlers
     ############################################################
@@ -271,6 +333,52 @@ class LocalLink:
             initiator_controller.public_address, int(not (initiator_new_role))
         )
 
+    def classic_sco_connect(
+        self,
+        initiator_controller: controller.Controller,
+        responder_address: Address,
+        link_type: int,
+    ):
+        logger.debug(
+            f'[Classic] {initiator_controller.public_address} connects SCO to {responder_address}'
+        )
+        responder_controller = self.find_classic_controller(responder_address)
+        # Initiator controller should handle it.
+        assert responder_controller
+
+        responder_controller.on_classic_connection_request(
+            initiator_controller.public_address,
+            link_type,
+        )
+
+    def classic_accept_sco_connection(
+        self,
+        responder_controller: controller.Controller,
+        initiator_address: Address,
+        link_type: int,
+    ):
+        logger.debug(
+            f'[Classic] {responder_controller.public_address} accepts to connect SCO {initiator_address}'
+        )
+        initiator_controller = self.find_classic_controller(initiator_address)
+        if initiator_controller is None:
+            responder_controller.on_classic_sco_connection_complete(
+                responder_controller.public_address,
+                HCI_UNKNOWN_CONNECTION_IDENTIFIER_ERROR,
+                link_type,
+            )
+            return
+
+        async def task():
+            initiator_controller.on_classic_sco_connection_complete(
+                responder_controller.public_address, HCI_SUCCESS, link_type
+            )
+
+        asyncio.create_task(task())
+        responder_controller.on_classic_sco_connection_complete(
+            initiator_controller.public_address, HCI_SUCCESS, link_type
+        )
+
 
 # -----------------------------------------------------------------------------
 class RemoteLink:

bumble/pandora/host.py

@@ -34,8 +34,11 @@ from bumble.device import (
     DEVICE_DEFAULT_SCAN_INTERVAL,
     DEVICE_DEFAULT_SCAN_WINDOW,
     Advertisement,
+    AdvertisingParameters,
+    AdvertisingEventProperties,
     AdvertisingType,
     Device,
+    Phy,
 )
 from bumble.gatt import Service
 from bumble.hci import (
@@ -47,9 +50,12 @@ from bumble.hci import (
 from google.protobuf import any_pb2  # pytype: disable=pyi-error
 from google.protobuf import empty_pb2  # pytype: disable=pyi-error
 from pandora.host_grpc_aio import HostServicer
+from pandora import host_pb2
 from pandora.host_pb2 import (
     NOT_CONNECTABLE,
     NOT_DISCOVERABLE,
+    DISCOVERABLE_LIMITED,
+    DISCOVERABLE_GENERAL,
     PRIMARY_1M,
     PRIMARY_CODED,
     SECONDARY_1M,
@@ -65,6 +71,7 @@ from pandora.host_pb2 import (
     ConnectResponse,
     DataTypes,
     DisconnectRequest,
+    DiscoverabilityMode,
     InquiryResponse,
     PrimaryPhy,
     ReadLocalAddressResponse,
@@ -94,6 +101,25 @@ SECONDARY_PHY_MAP: Dict[int, SecondaryPhy] = {
     3: SECONDARY_CODED,
 }
 
+PRIMARY_PHY_TO_BUMBLE_PHY_MAP: Dict[PrimaryPhy, Phy] = {
+    PRIMARY_1M: Phy.LE_1M,
+    PRIMARY_CODED: Phy.LE_CODED,
+}
+
+SECONDARY_PHY_TO_BUMBLE_PHY_MAP: Dict[SecondaryPhy, Phy] = {
+    SECONDARY_NONE: Phy.LE_1M,
+    SECONDARY_1M: Phy.LE_1M,
+    SECONDARY_2M: Phy.LE_2M,
+    SECONDARY_CODED: Phy.LE_CODED,
+}
+
+OWN_ADDRESS_MAP: Dict[host_pb2.OwnAddressType, bumble.hci.OwnAddressType] = {
+    host_pb2.PUBLIC: bumble.hci.OwnAddressType.PUBLIC,
+    host_pb2.RANDOM: bumble.hci.OwnAddressType.RANDOM,
+    host_pb2.RESOLVABLE_OR_PUBLIC: bumble.hci.OwnAddressType.RESOLVABLE_OR_PUBLIC,
+    host_pb2.RESOLVABLE_OR_RANDOM: bumble.hci.OwnAddressType.RESOLVABLE_OR_RANDOM,
+}
+
 
 class HostService(HostServicer):
     waited_connections: Set[int]
@@ -281,14 +307,118 @@ class HostService(HostServicer):
     async def Advertise(
         self, request: AdvertiseRequest, context: grpc.ServicerContext
     ) -> AsyncGenerator[AdvertiseResponse, None]:
-        if not request.legacy:
+        try:
-            raise NotImplementedError(
+            if request.legacy:
-                "TODO: add support for extended advertising in Bumble"
+                async for rsp in self.legacy_advertise(request, context):
+                    yield rsp
+            else:
+                async for rsp in self.extended_advertise(request, context):
+                    yield rsp
+        finally:
+            pass
+
+    async def extended_advertise(
+        self, request: AdvertiseRequest, context: grpc.ServicerContext
+    ) -> AsyncGenerator[AdvertiseResponse, None]:
+        advertising_data = bytes(self.unpack_data_types(request.data))
+        scan_response_data = bytes(self.unpack_data_types(request.scan_response_data))
+        scannable = len(scan_response_data) != 0
+
+        advertising_event_properties = AdvertisingEventProperties(
+            is_connectable=request.connectable,
+            is_scannable=scannable,
+            is_directed=request.target is not None,
+            is_high_duty_cycle_directed_connectable=False,
+            is_legacy=False,
+            is_anonymous=False,
+            include_tx_power=False,
         )
-        if request.interval:
+
-            raise NotImplementedError("TODO: add support for `request.interval`")
+        peer_address = Address.ANY
-        if request.interval_range:
+        if request.target:
-            raise NotImplementedError("TODO: add support for `request.interval_range`")
+            # Need to reverse bytes order since Bumble Address is using MSB.
+            target_bytes = bytes(reversed(request.target))
+            if request.target_variant() == "public":
+                peer_address = Address(target_bytes, Address.PUBLIC_DEVICE_ADDRESS)
+            else:
+                peer_address = Address(target_bytes, Address.RANDOM_DEVICE_ADDRESS)
+
+        advertising_parameters = AdvertisingParameters(
+            advertising_event_properties=advertising_event_properties,
+            own_address_type=OWN_ADDRESS_MAP[request.own_address_type],
+            peer_address=peer_address,
+            primary_advertising_phy=PRIMARY_PHY_TO_BUMBLE_PHY_MAP[request.primary_phy],
+            secondary_advertising_phy=SECONDARY_PHY_TO_BUMBLE_PHY_MAP[
+                request.secondary_phy
+            ],
+        )
+        if advertising_interval := request.interval:
+            advertising_parameters.primary_advertising_interval_min = int(
+                advertising_interval
+            )
+            advertising_parameters.primary_advertising_interval_max = int(
+                advertising_interval
+            )
+        if interval_range := request.interval_range:
+            advertising_parameters.primary_advertising_interval_max += int(
+                interval_range
+            )
+
+        advertising_set = await self.device.create_advertising_set(
+            advertising_parameters=advertising_parameters,
+            advertising_data=advertising_data,
+            scan_response_data=scan_response_data,
+        )
+
+        pending_connection: asyncio.Future[
+            bumble.device.Connection
+        ] = asyncio.get_running_loop().create_future()
+
+        if request.connectable:
+
+            def on_connection(connection: bumble.device.Connection) -> None:
+                if (
+                    connection.transport == BT_LE_TRANSPORT
+                    and connection.role == BT_PERIPHERAL_ROLE
+                ):
+                    pending_connection.set_result(connection)
+
+            self.device.on('connection', on_connection)
+
+        try:
+            # Advertise until RPC is canceled
+            while True:
+                if not advertising_set.enabled:
+                    self.log.debug('Advertise (extended)')
+                    await advertising_set.start()
+
+                if not request.connectable:
+                    await asyncio.sleep(1)
+                    continue
+
+                connection = await pending_connection
+                pending_connection = asyncio.get_running_loop().create_future()
+
+                cookie = any_pb2.Any(value=connection.handle.to_bytes(4, 'big'))
+                yield AdvertiseResponse(connection=Connection(cookie=cookie))
+
+                await asyncio.sleep(1)
+        finally:
+            try:
+                self.log.debug('Stop Advertise (extended)')
+                await advertising_set.stop()
+                await advertising_set.remove()
+            except Exception:
+                pass
+
+    async def legacy_advertise(
+        self, request: AdvertiseRequest, context: grpc.ServicerContext
+    ) -> AsyncGenerator[AdvertiseResponse, None]:
+        if advertising_interval := request.interval:
+            self.device.config.advertising_interval_min = int(advertising_interval)
+            self.device.config.advertising_interval_max = int(advertising_interval)
+        if interval_range := request.interval_range:
+            self.device.config.advertising_interval_max += int(interval_range)
         if request.primary_phy:
             raise NotImplementedError("TODO: add support for `request.primary_phy`")
         if request.secondary_phy:
@@ -356,14 +486,10 @@ class HostService(HostServicer):
             target_bytes = bytes(reversed(request.target))
             if request.target_variant() == "public":
                 target = Address(target_bytes, Address.PUBLIC_DEVICE_ADDRESS)
-                advertising_type = (
+                advertising_type = AdvertisingType.DIRECTED_CONNECTABLE_LOW_DUTY
-                    AdvertisingType.DIRECTED_CONNECTABLE_HIGH_DUTY
-                )  # FIXME: HIGH_DUTY ?
             else:
                 target = Address(target_bytes, Address.RANDOM_DEVICE_ADDRESS)
-                advertising_type = (
+                advertising_type = AdvertisingType.DIRECTED_CONNECTABLE_LOW_DUTY
-                    AdvertisingType.DIRECTED_CONNECTABLE_HIGH_DUTY
-                )  # FIXME: HIGH_DUTY ?
 
         if request.connectable:
 
@@ -421,11 +547,16 @@ class HostService(HostServicer):
         self, request: ScanRequest, context: grpc.ServicerContext
     ) -> AsyncGenerator[ScanningResponse, None]:
         # TODO: modify `start_scanning` to accept floats instead of int for ms values
-        if request.phys:
-            raise NotImplementedError("TODO: add support for `request.phys`")
-
         self.log.debug('Scan')
 
+        scanning_phys = []
+        if PRIMARY_1M in request.phys:
+            scanning_phys.append(int(Phy.LE_1M))
+        if PRIMARY_CODED in request.phys:
+            scanning_phys.append(int(Phy.LE_CODED))
+        if not scanning_phys:
+            scanning_phys = [int(Phy.LE_1M), int(Phy.LE_CODED)]
+
         scan_queue: asyncio.Queue[Advertisement] = asyncio.Queue()
         handler = self.device.on('advertisement', scan_queue.put_nowait)
         await self.device.start_scanning(
@@ -438,6 +569,7 @@ class HostService(HostServicer):
             scan_window=int(request.window)
             if request.window
             else DEVICE_DEFAULT_SCAN_WINDOW,
+            scanning_phys=scanning_phys,
         )
 
         try:
@@ -734,6 +866,16 @@ class HostService(HostServicer):
                 )
             )
 
+        flag_map = {
+            NOT_DISCOVERABLE: 0x00,
+            DISCOVERABLE_LIMITED: AdvertisingData.LE_LIMITED_DISCOVERABLE_MODE_FLAG,
+            DISCOVERABLE_GENERAL: AdvertisingData.LE_GENERAL_DISCOVERABLE_MODE_FLAG,
+        }
+
+        if dt.le_discoverability_mode:
+            flags = flag_map[dt.le_discoverability_mode]
+            ad_structures.append((AdvertisingData.FLAGS, flags.to_bytes(1, 'big')))
+
         return AdvertisingData(ad_structures)
 
     def pack_data_types(self, ad: AdvertisingData) -> DataTypes:

bumble/pandora/security.py

@@ -110,7 +110,7 @@ class PairingDelegate(BasePairingDelegate):
 
         event = self.add_origin(PairingEvent(just_works=empty_pb2.Empty()))
         self.service.event_queue.put_nowait(event)
-        answer = await anext(self.service.event_answer)  # pytype: disable=name-error
+        answer = await anext(self.service.event_answer)  # type: ignore
         assert answer.event == event
         assert answer.answer_variant() == 'confirm' and answer.confirm is not None
         return answer.confirm
@@ -125,7 +125,7 @@ class PairingDelegate(BasePairingDelegate):
 
         event = self.add_origin(PairingEvent(numeric_comparison=number))
         self.service.event_queue.put_nowait(event)
-        answer = await anext(self.service.event_answer)  # pytype: disable=name-error
+        answer = await anext(self.service.event_answer)  # type: ignore
         assert answer.event == event
         assert answer.answer_variant() == 'confirm' and answer.confirm is not None
         return answer.confirm
@@ -140,7 +140,7 @@ class PairingDelegate(BasePairingDelegate):
 
         event = self.add_origin(PairingEvent(passkey_entry_request=empty_pb2.Empty()))
         self.service.event_queue.put_nowait(event)
-        answer = await anext(self.service.event_answer)  # pytype: disable=name-error
+        answer = await anext(self.service.event_answer)  # type: ignore
         assert answer.event == event
         if answer.answer_variant() is None:
             return None
@@ -157,7 +157,7 @@ class PairingDelegate(BasePairingDelegate):
 
         event = self.add_origin(PairingEvent(pin_code_request=empty_pb2.Empty()))
         self.service.event_queue.put_nowait(event)
-        answer = await anext(self.service.event_answer)  # pytype: disable=name-error
+        answer = await anext(self.service.event_answer)  # type: ignore
         assert answer.event == event
         if answer.answer_variant() is None:
             return None

bumble/profiles/asha_service.py

@@ -18,7 +18,7 @@
 # -----------------------------------------------------------------------------
 import struct
 import logging
-from typing import List
+from typing import List, Optional
 
 from bumble import l2cap
 from ..core import AdvertisingData
@@ -67,7 +67,7 @@ class AshaService(TemplateService):
             self.emit('volume', connection, value[0])
 
         # Handler for audio control commands
-        def on_audio_control_point_write(connection: Connection, value):
+        def on_audio_control_point_write(connection: Optional[Connection], value):
             logger.info(f'--- AUDIO CONTROL POINT Write:{value.hex()}')
             opcode = value[0]
             if opcode == AshaService.OPCODE_START:

bumble/profiles/cap.py

@@ -0,0 +1,52 @@
+# Copyright 2021-2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+from __future__ import annotations
+
+from bumble import gatt
+from bumble import gatt_client
+from bumble.profiles import csip
+
+
+# -----------------------------------------------------------------------------
+# Server
+# -----------------------------------------------------------------------------
+class CommonAudioServiceService(gatt.TemplateService):
+    UUID = gatt.GATT_COMMON_AUDIO_SERVICE
+
+    def __init__(
+        self,
+        coordinated_set_identification_service: csip.CoordinatedSetIdentificationService,
+    ) -> None:
+        self.coordinated_set_identification_service = (
+            coordinated_set_identification_service
+        )
+        super().__init__(
+            characteristics=[],
+            included_services=[coordinated_set_identification_service],
+        )
+
+
+# -----------------------------------------------------------------------------
+# Client
+# -----------------------------------------------------------------------------
+class CommonAudioServiceServiceProxy(gatt_client.ProfileServiceProxy):
+    SERVICE_CLASS = CommonAudioServiceService
+
+    def __init__(self, service_proxy: gatt_client.ServiceProxy) -> None:
+        self.service_proxy = service_proxy

bumble/profiles/csip.py

@@ -19,8 +19,11 @@
 from __future__ import annotations
 import enum
 import struct
-from typing import Optional
+from typing import Optional, Tuple
 
+from bumble import core
+from bumble import crypto
+from bumble import device
 from bumble import gatt
 from bumble import gatt_client
 
@@ -28,6 +31,9 @@ from bumble import gatt_client
 # -----------------------------------------------------------------------------
 # Constants
 # -----------------------------------------------------------------------------
+SET_IDENTITY_RESOLVING_KEY_LENGTH = 16
+
+
 class SirkType(enum.IntEnum):
     '''Coordinated Set Identification Service - 5.1 Set Identity Resolving Key.'''
 
@@ -43,9 +49,47 @@ class MemberLock(enum.IntEnum):
 
 
 # -----------------------------------------------------------------------------
-# Utils
+# Crypto Toolbox
 # -----------------------------------------------------------------------------
-# TODO: Implement RSI Generator
+def s1(m: bytes) -> bytes:
+    '''
+    Coordinated Set Identification Service - 4.3 s1 SALT generation function.
+    '''
+    return crypto.aes_cmac(m[::-1], bytes(16))[::-1]
+
+
+def k1(n: bytes, salt: bytes, p: bytes) -> bytes:
+    '''
+    Coordinated Set Identification Service - 4.4 k1 derivation function.
+    '''
+    t = crypto.aes_cmac(n[::-1], salt[::-1])
+    return crypto.aes_cmac(p[::-1], t)[::-1]
+
+
+def sef(k: bytes, r: bytes) -> bytes:
+    '''
+    Coordinated Set Identification Service - 4.5 SIRK encryption function sef.
+
+    SIRK decryption function sdf shares the same algorithm. The only difference is that argument r is:
+      * Plaintext in encryption
+      * Cipher in decryption
+    '''
+    return crypto.xor(k1(k, s1(b'SIRKenc'[::-1]), b'csis'[::-1]), r)
+
+
+def sih(k: bytes, r: bytes) -> bytes:
+    '''
+    Coordinated Set Identification Service - 4.7 Resolvable Set Identifier hash function sih.
+    '''
+    return crypto.e(k, r + bytes(13))[:3]
+
+
+def generate_rsi(sirk: bytes) -> bytes:
+    '''
+    Coordinated Set Identification Service - 4.8 Resolvable Set Identifier generation operation.
+    '''
+    prand = crypto.generate_prand()
+    return sih(sirk, prand) + prand
 
 
 # -----------------------------------------------------------------------------
@@ -54,6 +98,7 @@ class MemberLock(enum.IntEnum):
 class CoordinatedSetIdentificationService(gatt.TemplateService):
     UUID = gatt.GATT_COORDINATED_SET_IDENTIFICATION_SERVICE
 
+    set_identity_resolving_key: bytes
     set_identity_resolving_key_characteristic: gatt.Characteristic
     coordinated_set_size_characteristic: Optional[gatt.Characteristic] = None
     set_member_lock_characteristic: Optional[gatt.Characteristic] = None
@@ -62,19 +107,26 @@ class CoordinatedSetIdentificationService(gatt.TemplateService):
     def __init__(
         self,
         set_identity_resolving_key: bytes,
+        set_identity_resolving_key_type: SirkType,
         coordinated_set_size: Optional[int] = None,
         set_member_lock: Optional[MemberLock] = None,
         set_member_rank: Optional[int] = None,
     ) -> None:
+        if len(set_identity_resolving_key) != SET_IDENTITY_RESOLVING_KEY_LENGTH:
+            raise ValueError(
+                f'Invalid SIRK length {len(set_identity_resolving_key)}, expected {SET_IDENTITY_RESOLVING_KEY_LENGTH}'
+            )
+
         characteristics = []
 
+        self.set_identity_resolving_key = set_identity_resolving_key
+        self.set_identity_resolving_key_type = set_identity_resolving_key_type
         self.set_identity_resolving_key_characteristic = gatt.Characteristic(
             uuid=gatt.GATT_SET_IDENTITY_RESOLVING_KEY_CHARACTERISTIC,
             properties=gatt.Characteristic.Properties.READ
             | gatt.Characteristic.Properties.NOTIFY,
-            permissions=gatt.Characteristic.Permissions.READABLE,
+            permissions=gatt.Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
-            # TODO: Implement encrypted SIRK reader.
+            value=gatt.CharacteristicValue(read=self.on_sirk_read),
-            value=struct.pack('B', SirkType.PLAINTEXT) + set_identity_resolving_key,
         )
         characteristics.append(self.set_identity_resolving_key_characteristic)
 
@@ -83,7 +135,7 @@ class CoordinatedSetIdentificationService(gatt.TemplateService):
                 uuid=gatt.GATT_COORDINATED_SET_SIZE_CHARACTERISTIC,
                 properties=gatt.Characteristic.Properties.READ
                 | gatt.Characteristic.Properties.NOTIFY,
-                permissions=gatt.Characteristic.Permissions.READABLE,
+                permissions=gatt.Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
                 value=struct.pack('B', coordinated_set_size),
             )
             characteristics.append(self.coordinated_set_size_characteristic)
@@ -94,7 +146,7 @@ class CoordinatedSetIdentificationService(gatt.TemplateService):
                 properties=gatt.Characteristic.Properties.READ
                 | gatt.Characteristic.Properties.NOTIFY
                 | gatt.Characteristic.Properties.WRITE,
-                permissions=gatt.Characteristic.Permissions.READABLE
+                permissions=gatt.Characteristic.Permissions.READ_REQUIRES_ENCRYPTION
                 | gatt.Characteristic.Permissions.WRITEABLE,
                 value=struct.pack('B', set_member_lock),
             )
@@ -105,13 +157,45 @@ class CoordinatedSetIdentificationService(gatt.TemplateService):
                 uuid=gatt.GATT_SET_MEMBER_RANK_CHARACTERISTIC,
                 properties=gatt.Characteristic.Properties.READ
                 | gatt.Characteristic.Properties.NOTIFY,
-                permissions=gatt.Characteristic.Permissions.READABLE,
+                permissions=gatt.Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
                 value=struct.pack('B', set_member_rank),
             )
             characteristics.append(self.set_member_rank_characteristic)
 
         super().__init__(characteristics)
 
+    async def on_sirk_read(self, connection: Optional[device.Connection]) -> bytes:
+        if self.set_identity_resolving_key_type == SirkType.PLAINTEXT:
+            sirk_bytes = self.set_identity_resolving_key
+        else:
+            assert connection
+
+            if connection.transport == core.BT_LE_TRANSPORT:
+                key = await connection.device.get_long_term_key(
+                    connection_handle=connection.handle, rand=b'', ediv=0
+                )
+            else:
+                key = await connection.device.get_link_key(connection.peer_address)
+
+            if not key:
+                raise RuntimeError('LTK or LinkKey is not present')
+
+            sirk_bytes = sef(key, self.set_identity_resolving_key)
+
+        return bytes([self.set_identity_resolving_key_type]) + sirk_bytes
+
+    def get_advertising_data(self) -> bytes:
+        return bytes(
+            core.AdvertisingData(
+                [
+                    (
+                        core.AdvertisingData.RESOLVABLE_SET_IDENTIFIER,
+                        generate_rsi(self.set_identity_resolving_key),
+                    ),
+                ]
+            )
+        )
+
 
 # -----------------------------------------------------------------------------
 # Client
@@ -145,3 +229,29 @@ class CoordinatedSetIdentificationProxy(gatt_client.ProfileServiceProxy):
             gatt.GATT_SET_MEMBER_RANK_CHARACTERISTIC
         ):
             self.set_member_rank = characteristics[0]
+
+    async def read_set_identity_resolving_key(self) -> Tuple[SirkType, bytes]:
+        '''Reads SIRK and decrypts if encrypted.'''
+        response = await self.set_identity_resolving_key.read_value()
+        if len(response) != SET_IDENTITY_RESOLVING_KEY_LENGTH + 1:
+            raise RuntimeError('Invalid SIRK value')
+
+        sirk_type = SirkType(response[0])
+        if sirk_type == SirkType.PLAINTEXT:
+            sirk = response[1:]
+        else:
+            connection = self.service_proxy.client.connection
+            device = connection.device
+            if connection.transport == core.BT_LE_TRANSPORT:
+                key = await device.get_long_term_key(
+                    connection_handle=connection.handle, rand=b'', ediv=0
+                )
+            else:
+                key = await device.get_link_key(connection.peer_address)
+
+            if not key:
+                raise RuntimeError('LTK or LinkKey is not present')
+
+            sirk = sef(key, response[1:])
+
+        return (sirk_type, sirk)

bumble/profiles/vcp.py

@@ -0,0 +1,228 @@
+# Copyright 2021-2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+from __future__ import annotations
+import enum
+
+from bumble import att
+from bumble import device
+from bumble import gatt
+from bumble import gatt_client
+
+from typing import Optional
+
+# -----------------------------------------------------------------------------
+# Constants
+# -----------------------------------------------------------------------------
+
+MIN_VOLUME = 0
+MAX_VOLUME = 255
+
+
+class ErrorCode(enum.IntEnum):
+    '''
+    See Volume Control Service 1.6. Application error codes.
+    '''
+
+    INVALID_CHANGE_COUNTER = 0x80
+    OPCODE_NOT_SUPPORTED = 0x81
+
+
+class VolumeFlags(enum.IntFlag):
+    '''
+    See Volume Control Service 3.3. Volume Flags.
+    '''
+
+    VOLUME_SETTING_PERSISTED = 0x01
+    # RFU
+
+
+class VolumeControlPointOpcode(enum.IntEnum):
+    '''
+    See Volume Control Service Table 3.3: Volume Control Point procedure requirements.
+    '''
+
+    # fmt: off
+    RELATIVE_VOLUME_DOWN        = 0x00
+    RELATIVE_VOLUME_UP          = 0x01
+    UNMUTE_RELATIVE_VOLUME_DOWN = 0x02
+    UNMUTE_RELATIVE_VOLUME_UP   = 0x03
+    SET_ABSOLUTE_VOLUME         = 0x04
+    UNMUTE                      = 0x05
+    MUTE                        = 0x06
+
+
+# -----------------------------------------------------------------------------
+# Server
+# -----------------------------------------------------------------------------
+class VolumeControlService(gatt.TemplateService):
+    UUID = gatt.GATT_VOLUME_CONTROL_SERVICE
+
+    volume_state: gatt.Characteristic
+    volume_control_point: gatt.Characteristic
+    volume_flags: gatt.Characteristic
+
+    volume_setting: int
+    muted: int
+    change_counter: int
+
+    def __init__(
+        self,
+        step_size: int = 16,
+        volume_setting: int = 0,
+        muted: int = 0,
+        change_counter: int = 0,
+        volume_flags: int = 0,
+    ) -> None:
+        self.step_size = step_size
+        self.volume_setting = volume_setting
+        self.muted = muted
+        self.change_counter = change_counter
+
+        self.volume_state = gatt.Characteristic(
+            uuid=gatt.GATT_VOLUME_STATE_CHARACTERISTIC,
+            properties=(
+                gatt.Characteristic.Properties.READ
+                | gatt.Characteristic.Properties.NOTIFY
+            ),
+            permissions=gatt.Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
+            value=gatt.CharacteristicValue(read=self._on_read_volume_state),
+        )
+        self.volume_control_point = gatt.Characteristic(
+            uuid=gatt.GATT_VOLUME_CONTROL_POINT_CHARACTERISTIC,
+            properties=gatt.Characteristic.Properties.WRITE,
+            permissions=gatt.Characteristic.Permissions.WRITE_REQUIRES_ENCRYPTION,
+            value=gatt.CharacteristicValue(write=self._on_write_volume_control_point),
+        )
+        self.volume_flags = gatt.Characteristic(
+            uuid=gatt.GATT_VOLUME_FLAGS_CHARACTERISTIC,
+            properties=gatt.Characteristic.Properties.READ,
+            permissions=gatt.Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
+            value=bytes([volume_flags]),
+        )
+
+        super().__init__(
+            [
+                self.volume_state,
+                self.volume_control_point,
+                self.volume_flags,
+            ]
+        )
+
+    @property
+    def volume_state_bytes(self) -> bytes:
+        return bytes([self.volume_setting, self.muted, self.change_counter])
+
+    @volume_state_bytes.setter
+    def volume_state_bytes(self, new_value: bytes) -> None:
+        self.volume_setting, self.muted, self.change_counter = new_value
+
+    def _on_read_volume_state(self, _connection: Optional[device.Connection]) -> bytes:
+        return self.volume_state_bytes
+
+    def _on_write_volume_control_point(
+        self, connection: Optional[device.Connection], value: bytes
+    ) -> None:
+        assert connection
+
+        opcode = VolumeControlPointOpcode(value[0])
+        change_counter = value[1]
+
+        if change_counter != self.change_counter:
+            raise att.ATT_Error(ErrorCode.INVALID_CHANGE_COUNTER)
+
+        handler = getattr(self, '_on_' + opcode.name.lower())
+        if handler(*value[2:]):
+            self.change_counter = (self.change_counter + 1) % 256
+            connection.abort_on(
+                'disconnection',
+                connection.device.notify_subscribers(
+                    attribute=self.volume_state,
+                    value=self.volume_state_bytes,
+                ),
+            )
+            self.emit(
+                'volume_state', self.volume_setting, self.muted, self.change_counter
+            )
+
+    def _on_relative_volume_down(self) -> bool:
+        old_volume = self.volume_setting
+        self.volume_setting = max(self.volume_setting - self.step_size, MIN_VOLUME)
+        return self.volume_setting != old_volume
+
+    def _on_relative_volume_up(self) -> bool:
+        old_volume = self.volume_setting
+        self.volume_setting = min(self.volume_setting + self.step_size, MAX_VOLUME)
+        return self.volume_setting != old_volume
+
+    def _on_unmute_relative_volume_down(self) -> bool:
+        old_volume, old_muted_state = self.volume_setting, self.muted
+        self.volume_setting = max(self.volume_setting - self.step_size, MIN_VOLUME)
+        self.muted = 0
+        return (self.volume_setting, self.muted) != (old_volume, old_muted_state)
+
+    def _on_unmute_relative_volume_up(self) -> bool:
+        old_volume, old_muted_state = self.volume_setting, self.muted
+        self.volume_setting = min(self.volume_setting + self.step_size, MAX_VOLUME)
+        self.muted = 0
+        return (self.volume_setting, self.muted) != (old_volume, old_muted_state)
+
+    def _on_set_absolute_volume(self, volume_setting: int) -> bool:
+        old_volume_setting = self.volume_setting
+        self.volume_setting = volume_setting
+        return old_volume_setting != self.volume_setting
+
+    def _on_unmute(self) -> bool:
+        old_muted_state = self.muted
+        self.muted = 0
+        return self.muted != old_muted_state
+
+    def _on_mute(self) -> bool:
+        old_muted_state = self.muted
+        self.muted = 1
+        return self.muted != old_muted_state
+
+
+# -----------------------------------------------------------------------------
+# Client
+# -----------------------------------------------------------------------------
+class VolumeControlServiceProxy(gatt_client.ProfileServiceProxy):
+    SERVICE_CLASS = VolumeControlService
+
+    volume_control_point: gatt_client.CharacteristicProxy
+
+    def __init__(self, service_proxy: gatt_client.ServiceProxy) -> None:
+        self.service_proxy = service_proxy
+
+        self.volume_state = gatt.PackedCharacteristicAdapter(
+            service_proxy.get_characteristics_by_uuid(
+                gatt.GATT_VOLUME_STATE_CHARACTERISTIC
+            )[0],
+            'BBB',
+        )
+
+        self.volume_control_point = service_proxy.get_characteristics_by_uuid(
+            gatt.GATT_VOLUME_CONTROL_POINT_CHARACTERISTIC
+        )[0]
+
+        self.volume_flags = gatt.PackedCharacteristicAdapter(
+            service_proxy.get_characteristics_by_uuid(
+                gatt.GATT_VOLUME_FLAGS_CHARACTERISTIC
+            )[0],
+            'B',
+        )

bumble/rfcomm.py

@@ -19,12 +19,16 @@ from __future__ import annotations
 
 import logging
 import asyncio
+import dataclasses
 import enum
 from typing import Callable, Dict, List, Optional, Tuple, Union, TYPE_CHECKING
+from typing_extensions import Self
 
 from pyee import EventEmitter
 
-from . import core, l2cap
+from bumble import core
+from bumble import l2cap
+from bumble import sdp
 from .colors import color
 from .core import (
     UUID,
@@ -34,15 +38,6 @@ from .core import (
     InvalidStateError,
     ProtocolError,
 )
-from .sdp import (
-    SDP_SERVICE_RECORD_HANDLE_ATTRIBUTE_ID,
-    SDP_BROWSE_GROUP_LIST_ATTRIBUTE_ID,
-    SDP_SERVICE_CLASS_ID_LIST_ATTRIBUTE_ID,
-    SDP_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID,
-    SDP_PUBLIC_BROWSE_ROOT,
-    DataElement,
-    ServiceAttribute,
-)
 
 if TYPE_CHECKING:
     from bumble.device import Device, Connection
@@ -60,27 +55,18 @@ logger = logging.getLogger(__name__)
 
 RFCOMM_PSM = 0x0003
 
+class FrameType(enum.IntEnum):
+    SABM = 0x2F  # Control field [1,1,1,1,_,1,0,0] LSB-first
+    UA   = 0x63  # Control field [0,1,1,0,_,0,1,1] LSB-first
+    DM   = 0x0F  # Control field [1,1,1,1,_,0,0,0] LSB-first
+    DISC = 0x43  # Control field [0,1,0,_,0,0,1,1] LSB-first
+    UIH  = 0xEF  # Control field [1,1,1,_,1,1,1,1] LSB-first
+    UI   = 0x03  # Control field [0,0,0,_,0,0,1,1] LSB-first
 
-# Frame types
+class MccType(enum.IntEnum):
-RFCOMM_SABM_FRAME = 0x2F  # Control field [1,1,1,1,_,1,0,0] LSB-first
+    PN  = 0x20
-RFCOMM_UA_FRAME   = 0x63  # Control field [0,1,1,0,_,0,1,1] LSB-first
+    MSC = 0x38
-RFCOMM_DM_FRAME   = 0x0F  # Control field [1,1,1,1,_,0,0,0] LSB-first
-RFCOMM_DISC_FRAME = 0x43  # Control field [0,1,0,_,0,0,1,1] LSB-first
-RFCOMM_UIH_FRAME  = 0xEF  # Control field [1,1,1,_,1,1,1,1] LSB-first
-RFCOMM_UI_FRAME   = 0x03  # Control field [0,0,0,_,0,0,1,1] LSB-first
 
-RFCOMM_FRAME_TYPE_NAMES = {
-    RFCOMM_SABM_FRAME: 'SABM',
-    RFCOMM_UA_FRAME:   'UA',
-    RFCOMM_DM_FRAME:   'DM',
-    RFCOMM_DISC_FRAME: 'DISC',
-    RFCOMM_UIH_FRAME:  'UIH',
-    RFCOMM_UI_FRAME:   'UI'
-}
-
-# MCC Types
-RFCOMM_MCC_PN_TYPE  = 0x20
-RFCOMM_MCC_MSC_TYPE = 0x38
 
 # FCS CRC
 CRC_TABLE = bytes([
@@ -118,8 +104,9 @@ CRC_TABLE = bytes([
     0XBA, 0X2B, 0X59, 0XC8, 0XBD, 0X2C, 0X5E, 0XCF
 ])
 
-RFCOMM_DEFAULT_INITIAL_RX_CREDITS = 7
+RFCOMM_DEFAULT_L2CAP_MTU      = 2048
-RFCOMM_DEFAULT_PREFERRED_MTU      = 1280
+RFCOMM_DEFAULT_WINDOW_SIZE    = 7
+RFCOMM_DEFAULT_MAX_FRAME_SIZE = 2000
 
 RFCOMM_DYNAMIC_CHANNEL_NUMBER_START = 1
 RFCOMM_DYNAMIC_CHANNEL_NUMBER_END   = 30
@@ -130,29 +117,33 @@ RFCOMM_DYNAMIC_CHANNEL_NUMBER_END   = 30
 # -----------------------------------------------------------------------------
 def make_service_sdp_records(
     service_record_handle: int, channel: int, uuid: Optional[UUID] = None
-) -> List[ServiceAttribute]:
+) -> List[sdp.ServiceAttribute]:
     """
     Create SDP records for an RFComm service given a channel number and an
     optional UUID. A Service Class Attribute is included only if the UUID is not None.
     """
     records = [
-        ServiceAttribute(
+        sdp.ServiceAttribute(
-            SDP_SERVICE_RECORD_HANDLE_ATTRIBUTE_ID,
+            sdp.SDP_SERVICE_RECORD_HANDLE_ATTRIBUTE_ID,
-            DataElement.unsigned_integer_32(service_record_handle),
+            sdp.DataElement.unsigned_integer_32(service_record_handle),
         ),
-        ServiceAttribute(
+        sdp.ServiceAttribute(
-            SDP_BROWSE_GROUP_LIST_ATTRIBUTE_ID,
+            sdp.SDP_BROWSE_GROUP_LIST_ATTRIBUTE_ID,
-            DataElement.sequence([DataElement.uuid(SDP_PUBLIC_BROWSE_ROOT)]),
+            sdp.DataElement.sequence(
+                [sdp.DataElement.uuid(sdp.SDP_PUBLIC_BROWSE_ROOT)]
             ),
-        ServiceAttribute(
+        ),
-            SDP_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+        sdp.ServiceAttribute(
-            DataElement.sequence(
+            sdp.SDP_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+            sdp.DataElement.sequence(
                 [
-                    DataElement.sequence([DataElement.uuid(BT_L2CAP_PROTOCOL_ID)]),
+                    sdp.DataElement.sequence(
-                    DataElement.sequence(
+                        [sdp.DataElement.uuid(BT_L2CAP_PROTOCOL_ID)]
+                    ),
+                    sdp.DataElement.sequence(
                         [
-                            DataElement.uuid(BT_RFCOMM_PROTOCOL_ID),
+                            sdp.DataElement.uuid(BT_RFCOMM_PROTOCOL_ID),
-                            DataElement.unsigned_integer_8(channel),
+                            sdp.DataElement.unsigned_integer_8(channel),
                         ]
                     ),
                 ]
@@ -162,15 +153,81 @@ def make_service_sdp_records(
 
     if uuid:
         records.append(
-            ServiceAttribute(
+            sdp.ServiceAttribute(
-                SDP_SERVICE_CLASS_ID_LIST_ATTRIBUTE_ID,
+                sdp.SDP_SERVICE_CLASS_ID_LIST_ATTRIBUTE_ID,
-                DataElement.sequence([DataElement.uuid(uuid)]),
+                sdp.DataElement.sequence([sdp.DataElement.uuid(uuid)]),
             )
         )
 
     return records
 
 
+# -----------------------------------------------------------------------------
+async def find_rfcomm_channels(connection: Connection) -> Dict[int, List[UUID]]:
+    """Searches all RFCOMM channels and their associated UUID from SDP service records.
+
+    Args:
+        connection: ACL connection to make SDP search.
+
+    Returns:
+        Dictionary mapping from channel number to service class UUID list.
+    """
+    results = {}
+    async with sdp.Client(connection) as sdp_client:
+        search_result = await sdp_client.search_attributes(
+            uuids=[core.BT_RFCOMM_PROTOCOL_ID],
+            attribute_ids=[
+                sdp.SDP_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+                sdp.SDP_SERVICE_CLASS_ID_LIST_ATTRIBUTE_ID,
+            ],
+        )
+        for attribute_lists in search_result:
+            service_classes: List[UUID] = []
+            channel: Optional[int] = None
+            for attribute in attribute_lists:
+                # The layout is [[L2CAP_PROTOCOL], [RFCOMM_PROTOCOL, RFCOMM_CHANNEL]].
+                if attribute.id == sdp.SDP_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID:
+                    protocol_descriptor_list = attribute.value.value
+                    channel = protocol_descriptor_list[1].value[1].value
+                elif attribute.id == sdp.SDP_SERVICE_CLASS_ID_LIST_ATTRIBUTE_ID:
+                    service_class_id_list = attribute.value.value
+                    service_classes = [
+                        service_class.value for service_class in service_class_id_list
+                    ]
+            if not service_classes or not channel:
+                logger.warning(f"Bad result {attribute_lists}.")
+            else:
+                results[channel] = service_classes
+    return results
+
+
+# -----------------------------------------------------------------------------
+async def find_rfcomm_channel_with_uuid(
+    connection: Connection, uuid: str | UUID
+) -> Optional[int]:
+    """Searches an RFCOMM channel associated with given UUID from service records.
+
+    Args:
+        connection: ACL connection to make SDP search.
+        uuid: UUID of service record to search for.
+
+    Returns:
+        RFCOMM channel number if found, otherwise None.
+    """
+    if isinstance(uuid, str):
+        uuid = UUID(uuid)
+    return next(
+        (
+            channel
+            for channel, class_id_list in (
+                await find_rfcomm_channels(connection)
+            ).items()
+            if uuid in class_id_list
+        ),
+        None,
+    )
+
+
 # -----------------------------------------------------------------------------
 def compute_fcs(buffer: bytes) -> int:
     result = 0xFF
@@ -183,7 +240,7 @@ def compute_fcs(buffer: bytes) -> int:
 class RFCOMM_Frame:
     def __init__(
         self,
-        frame_type: int,
+        frame_type: FrameType,
         c_r: int,
         dlci: int,
         p_f: int,
@@ -206,14 +263,11 @@ class RFCOMM_Frame:
             self.length = bytes([(length << 1) | 1])
         self.address = (dlci << 2) | (c_r << 1) | 1
         self.control = frame_type | (p_f << 4)
-        if frame_type == RFCOMM_UIH_FRAME:
+        if frame_type == FrameType.UIH:
             self.fcs = compute_fcs(bytes([self.address, self.control]))
         else:
             self.fcs = compute_fcs(bytes([self.address, self.control]) + self.length)
 
-    def type_name(self) -> str:
-        return RFCOMM_FRAME_TYPE_NAMES[self.type]
-
     @staticmethod
     def parse_mcc(data) -> Tuple[int, bool, bytes]:
         mcc_type = data[0] >> 2
@@ -237,24 +291,24 @@ class RFCOMM_Frame:
 
     @staticmethod
     def sabm(c_r: int, dlci: int):
-        return RFCOMM_Frame(RFCOMM_SABM_FRAME, c_r, dlci, 1)
+        return RFCOMM_Frame(FrameType.SABM, c_r, dlci, 1)
 
     @staticmethod
     def ua(c_r: int, dlci: int):
-        return RFCOMM_Frame(RFCOMM_UA_FRAME, c_r, dlci, 1)
+        return RFCOMM_Frame(FrameType.UA, c_r, dlci, 1)
 
     @staticmethod
     def dm(c_r: int, dlci: int):
-        return RFCOMM_Frame(RFCOMM_DM_FRAME, c_r, dlci, 1)
+        return RFCOMM_Frame(FrameType.DM, c_r, dlci, 1)
 
     @staticmethod
     def disc(c_r: int, dlci: int):
-        return RFCOMM_Frame(RFCOMM_DISC_FRAME, c_r, dlci, 1)
+        return RFCOMM_Frame(FrameType.DISC, c_r, dlci, 1)
 
     @staticmethod
     def uih(c_r: int, dlci: int, information: bytes, p_f: int = 0):
         return RFCOMM_Frame(
-            RFCOMM_UIH_FRAME, c_r, dlci, p_f, information, with_credits=(p_f == 1)
+            FrameType.UIH, c_r, dlci, p_f, information, with_credits=(p_f == 1)
         )
 
     @staticmethod
@@ -262,7 +316,7 @@ class RFCOMM_Frame:
         # Extract fields
         dlci = (data[0] >> 2) & 0x3F
         c_r = (data[0] >> 1) & 0x01
-        frame_type = data[1] & 0xEF
+        frame_type = FrameType(data[1] & 0xEF)
         p_f = (data[1] >> 4) & 0x01
         length = data[2]
         if length & 0x01:
@@ -291,7 +345,7 @@ class RFCOMM_Frame:
 
     def __str__(self) -> str:
         return (
-            f'{color(self.type_name(), "yellow")}'
+            f'{color(self.type.name, "yellow")}'
             f'(c/r={self.c_r},'
             f'dlci={self.dlci},'
             f'p/f={self.p_f},'
@@ -301,6 +355,7 @@ class RFCOMM_Frame:
 
 
 # -----------------------------------------------------------------------------
+@dataclasses.dataclass
 class RFCOMM_MCC_PN:
     dlci: int
     cl: int
@@ -310,23 +365,11 @@ class RFCOMM_MCC_PN:
     max_retransmissions: int
     window_size: int
 
-    def __init__(
+    def __post_init__(self) -> None:
-        self,
+        if self.window_size < 1 or self.window_size > 7:
-        dlci: int,
+            logger.warning(
-        cl: int,
+                f'Error Recovery Window size {self.window_size} is out of range [1, 7].'
-        priority: int,
+            )
-        ack_timer: int,
-        max_frame_size: int,
-        max_retransmissions: int,
-        window_size: int,
-    ) -> None:
-        self.dlci = dlci
-        self.cl = cl
-        self.priority = priority
-        self.ack_timer = ack_timer
-        self.max_frame_size = max_frame_size
-        self.max_retransmissions = max_retransmissions
-        self.window_size = window_size
 
     @staticmethod
     def from_bytes(data: bytes) -> RFCOMM_MCC_PN:
@@ -337,7 +380,7 @@ class RFCOMM_MCC_PN:
             ack_timer=data[3],
             max_frame_size=data[4] | data[5] << 8,
             max_retransmissions=data[6],
-            window_size=data[7],
+            window_size=data[7] & 0x07,
         )
 
     def __bytes__(self) -> bytes:
@@ -350,23 +393,14 @@ class RFCOMM_MCC_PN:
                 self.max_frame_size & 0xFF,
                 (self.max_frame_size >> 8) & 0xFF,
                 self.max_retransmissions & 0xFF,
-                self.window_size & 0xFF,
+                # Only 3 bits are meaningful.
+                self.window_size & 0x07,
             ]
         )
 
-    def __str__(self) -> str:
-        return (
-            f'PN(dlci={self.dlci},'
-            f'cl={self.cl},'
-            f'priority={self.priority},'
-            f'ack_timer={self.ack_timer},'
-            f'max_frame_size={self.max_frame_size},'
-            f'max_retransmissions={self.max_retransmissions},'
-            f'window_size={self.window_size})'
-        )
-
 
 # -----------------------------------------------------------------------------
+@dataclasses.dataclass
 class RFCOMM_MCC_MSC:
     dlci: int
     fc: int
@@ -375,16 +409,6 @@ class RFCOMM_MCC_MSC:
     ic: int
     dv: int
 
-    def __init__(
-        self, dlci: int, fc: int, rtc: int, rtr: int, ic: int, dv: int
-    ) -> None:
-        self.dlci = dlci
-        self.fc = fc
-        self.rtc = rtc
-        self.rtr = rtr
-        self.ic = ic
-        self.dv = dv
-
     @staticmethod
     def from_bytes(data: bytes) -> RFCOMM_MCC_MSC:
         return RFCOMM_MCC_MSC(
@@ -409,16 +433,6 @@ class RFCOMM_MCC_MSC:
             ]
         )
 
-    def __str__(self) -> str:
-        return (
-            f'MSC(dlci={self.dlci},'
-            f'fc={self.fc},'
-            f'rtc={self.rtc},'
-            f'rtr={self.rtr},'
-            f'ic={self.ic},'
-            f'dv={self.dv})'
-        )
-
 
 # -----------------------------------------------------------------------------
 class DLC(EventEmitter):
@@ -438,25 +452,29 @@ class DLC(EventEmitter):
         multiplexer: Multiplexer,
         dlci: int,
         max_frame_size: int,
-        initial_tx_credits: int,
+        window_size: int,
     ) -> None:
         super().__init__()
         self.multiplexer = multiplexer
         self.dlci = dlci
-        self.rx_credits = RFCOMM_DEFAULT_INITIAL_RX_CREDITS
+        self.max_frame_size = max_frame_size
-        self.rx_threshold = self.rx_credits // 2
+        self.window_size = window_size
-        self.tx_credits = initial_tx_credits
+        self.rx_credits = window_size
+        self.rx_threshold = window_size // 2
+        self.tx_credits = window_size
         self.tx_buffer = b''
         self.state = DLC.State.INIT
         self.role = multiplexer.role
         self.c_r = 1 if self.role == Multiplexer.Role.INITIATOR else 0
         self.sink = None
         self.connection_result = None
+        self.drained = asyncio.Event()
+        self.drained.set()
 
         # Compute the MTU
         max_overhead = 4 + 1  # header with 2-byte length + fcs
         self.mtu = min(
-            max_frame_size, self.multiplexer.l2cap_channel.mtu - max_overhead
+            max_frame_size, self.multiplexer.l2cap_channel.peer_mtu - max_overhead
         )
 
     def change_state(self, new_state: State) -> None:
@@ -467,7 +485,7 @@ class DLC(EventEmitter):
         self.multiplexer.send_frame(frame)
 
     def on_frame(self, frame: RFCOMM_Frame) -> None:
-        handler = getattr(self, f'on_{frame.type_name()}_frame'.lower())
+        handler = getattr(self, f'on_{frame.type.name}_frame'.lower())
         handler(frame)
 
     def on_sabm_frame(self, _frame: RFCOMM_Frame) -> None:
@@ -481,9 +499,7 @@ class DLC(EventEmitter):
 
         # Exchange the modem status with the peer
         msc = RFCOMM_MCC_MSC(dlci=self.dlci, fc=0, rtc=1, rtr=1, ic=0, dv=1)
-        mcc = RFCOMM_Frame.make_mcc(
+        mcc = RFCOMM_Frame.make_mcc(mcc_type=MccType.MSC, c_r=1, data=bytes(msc))
-            mcc_type=RFCOMM_MCC_MSC_TYPE, c_r=1, data=bytes(msc)
-        )
         logger.debug(f'>>> MCC MSC Command: {msc}')
         self.send_frame(RFCOMM_Frame.uih(c_r=self.c_r, dlci=0, information=mcc))
 
@@ -499,9 +515,7 @@ class DLC(EventEmitter):
 
         # Exchange the modem status with the peer
         msc = RFCOMM_MCC_MSC(dlci=self.dlci, fc=0, rtc=1, rtr=1, ic=0, dv=1)
-        mcc = RFCOMM_Frame.make_mcc(
+        mcc = RFCOMM_Frame.make_mcc(mcc_type=MccType.MSC, c_r=1, data=bytes(msc))
-            mcc_type=RFCOMM_MCC_MSC_TYPE, c_r=1, data=bytes(msc)
-        )
         logger.debug(f'>>> MCC MSC Command: {msc}')
         self.send_frame(RFCOMM_Frame.uih(c_r=self.c_r, dlci=0, information=mcc))
 
@@ -534,7 +548,8 @@ class DLC(EventEmitter):
             f'[{self.dlci}] {len(data)} bytes, '
             f'rx_credits={self.rx_credits}: {data.hex()}'
         )
-        if len(data) and self.sink:
+        if data:
+            if self.sink:
                 self.sink(data)  # pylint: disable=not-callable
 
             # Update the credits
@@ -554,9 +569,7 @@ class DLC(EventEmitter):
             # Command
             logger.debug(f'<<< MCC MSC Command: {msc}')
             msc = RFCOMM_MCC_MSC(dlci=self.dlci, fc=0, rtc=1, rtr=1, ic=0, dv=1)
-            mcc = RFCOMM_Frame.make_mcc(
+            mcc = RFCOMM_Frame.make_mcc(mcc_type=MccType.MSC, c_r=0, data=bytes(msc))
-                mcc_type=RFCOMM_MCC_MSC_TYPE, c_r=0, data=bytes(msc)
-            )
             logger.debug(f'>>> MCC MSC Response: {msc}')
             self.send_frame(RFCOMM_Frame.uih(c_r=self.c_r, dlci=0, information=mcc))
         else:
@@ -580,18 +593,18 @@ class DLC(EventEmitter):
             cl=0xE0,
             priority=7,
             ack_timer=0,
-            max_frame_size=RFCOMM_DEFAULT_PREFERRED_MTU,
+            max_frame_size=self.max_frame_size,
             max_retransmissions=0,
-            window_size=RFCOMM_DEFAULT_INITIAL_RX_CREDITS,
+            window_size=self.window_size,
         )
-        mcc = RFCOMM_Frame.make_mcc(mcc_type=RFCOMM_MCC_PN_TYPE, c_r=0, data=bytes(pn))
+        mcc = RFCOMM_Frame.make_mcc(mcc_type=MccType.PN, c_r=0, data=bytes(pn))
         logger.debug(f'>>> PN Response: {pn}')
         self.send_frame(RFCOMM_Frame.uih(c_r=self.c_r, dlci=0, information=mcc))
         self.change_state(DLC.State.CONNECTING)
 
     def rx_credits_needed(self) -> int:
         if self.rx_credits <= self.rx_threshold:
-            return RFCOMM_DEFAULT_INITIAL_RX_CREDITS - self.rx_credits
+            return self.window_size - self.rx_credits
 
         return 0
 
@@ -631,6 +644,8 @@ class DLC(EventEmitter):
             )
 
             rx_credits_needed = 0
+            if not self.tx_buffer:
+                self.drained.set()
 
     # Stream protocol
     def write(self, data: Union[bytes, str]) -> None:
@@ -643,11 +658,11 @@ class DLC(EventEmitter):
                 raise ValueError('write only accept bytes or strings')
 
         self.tx_buffer += data
+        self.drained.clear()
         self.process_tx()
 
-    def drain(self) -> None:
+    async def drain(self) -> None:
-        # TODO
+        await self.drained.wait()
-        pass
 
     def __str__(self) -> str:
         return f'DLC(dlci={self.dlci},state={self.state.name})'
@@ -704,7 +719,7 @@ class Multiplexer(EventEmitter):
         if frame.dlci == 0:
             self.on_frame(frame)
         else:
-            if frame.type == RFCOMM_DM_FRAME:
+            if frame.type == FrameType.DM:
                 # DM responses are for a DLCI, but since we only create the dlc when we
                 # receive a PN response (because we need the parameters), we handle DM
                 # frames at the Multiplexer level
@@ -717,7 +732,7 @@ class Multiplexer(EventEmitter):
                 dlc.on_frame(frame)
 
     def on_frame(self, frame: RFCOMM_Frame) -> None:
-        handler = getattr(self, f'on_{frame.type_name()}_frame'.lower())
+        handler = getattr(self, f'on_{frame.type.name}_frame'.lower())
         handler(frame)
 
     def on_sabm_frame(self, _frame: RFCOMM_Frame) -> None:
@@ -765,10 +780,10 @@ class Multiplexer(EventEmitter):
     def on_uih_frame(self, frame: RFCOMM_Frame) -> None:
         (mcc_type, c_r, value) = RFCOMM_Frame.parse_mcc(frame.information)
 
-        if mcc_type == RFCOMM_MCC_PN_TYPE:
+        if mcc_type == MccType.PN:
             pn = RFCOMM_MCC_PN.from_bytes(value)
             self.on_mcc_pn(c_r, pn)
-        elif mcc_type == RFCOMM_MCC_MSC_TYPE:
+        elif mcc_type == MccType.MSC:
             mcs = RFCOMM_MCC_MSC.from_bytes(value)
             self.on_mcc_msc(c_r, mcs)
 
@@ -843,7 +858,12 @@ class Multiplexer(EventEmitter):
         )
         await self.disconnection_result
 
-    async def open_dlc(self, channel: int) -> DLC:
+    async def open_dlc(
+        self,
+        channel: int,
+        max_frame_size: int = RFCOMM_DEFAULT_MAX_FRAME_SIZE,
+        window_size: int = RFCOMM_DEFAULT_WINDOW_SIZE,
+    ) -> DLC:
         if self.state != Multiplexer.State.CONNECTED:
             if self.state == Multiplexer.State.OPENING:
                 raise InvalidStateError('open already in progress')
@@ -855,11 +875,11 @@ class Multiplexer(EventEmitter):
             cl=0xF0,
             priority=7,
             ack_timer=0,
-            max_frame_size=RFCOMM_DEFAULT_PREFERRED_MTU,
+            max_frame_size=max_frame_size,
             max_retransmissions=0,
-            window_size=RFCOMM_DEFAULT_INITIAL_RX_CREDITS,
+            window_size=window_size,
         )
-        mcc = RFCOMM_Frame.make_mcc(mcc_type=RFCOMM_MCC_PN_TYPE, c_r=1, data=bytes(pn))
+        mcc = RFCOMM_Frame.make_mcc(mcc_type=MccType.PN, c_r=1, data=bytes(pn))
         logger.debug(f'>>> Sending MCC: {pn}')
         self.open_result = asyncio.get_running_loop().create_future()
         self.change_state(Multiplexer.State.OPENING)
@@ -889,8 +909,11 @@ class Client:
     multiplexer: Optional[Multiplexer]
     l2cap_channel: Optional[l2cap.ClassicChannel]
 
-    def __init__(self, connection: Connection) -> None:
+    def __init__(
+        self, connection: Connection, l2cap_mtu: int = RFCOMM_DEFAULT_L2CAP_MTU
+    ) -> None:
         self.connection = connection
+        self.l2cap_mtu = l2cap_mtu
         self.l2cap_channel = None
         self.multiplexer = None
 
@@ -898,7 +921,7 @@ class Client:
         # Create a new L2CAP connection
         try:
             self.l2cap_channel = await self.connection.create_l2cap_channel(
-                spec=l2cap.ClassicChannelSpec(RFCOMM_PSM)
+                spec=l2cap.ClassicChannelSpec(psm=RFCOMM_PSM, mtu=self.l2cap_mtu)
             )
         except ProtocolError as error:
             logger.warning(f'L2CAP connection failed: {error}')
@@ -921,22 +944,33 @@ class Client:
         self.multiplexer = None
 
         # Close the L2CAP channel
-        # TODO
+        if self.l2cap_channel:
+            await self.l2cap_channel.disconnect()
+            self.l2cap_channel = None
+
+    async def __aenter__(self) -> Multiplexer:
+        return await self.start()
+
+    async def __aexit__(self, *args) -> None:
+        await self.shutdown()
 
 
 # -----------------------------------------------------------------------------
 class Server(EventEmitter):
     acceptors: Dict[int, Callable[[DLC], None]]
 
-    def __init__(self, device: Device) -> None:
+    def __init__(
+        self, device: Device, l2cap_mtu: int = RFCOMM_DEFAULT_L2CAP_MTU
+    ) -> None:
         super().__init__()
         self.device = device
         self.multiplexer = None
         self.acceptors = {}
 
         # Register ourselves with the L2CAP channel manager
-        device.create_l2cap_server(
+        self.l2cap_server = device.create_l2cap_server(
-            spec=l2cap.ClassicChannelSpec(psm=RFCOMM_PSM), handler=self.on_connection
+            spec=l2cap.ClassicChannelSpec(psm=RFCOMM_PSM, mtu=l2cap_mtu),
+            handler=self.on_connection,
         )
 
     def listen(self, acceptor: Callable[[DLC], None], channel: int = 0) -> int:
@@ -986,3 +1020,9 @@ class Server(EventEmitter):
         acceptor = self.acceptors.get(dlc.dlci >> 1)
         if acceptor:
             acceptor(dlc)
+
+    def __enter__(self) -> Self:
+        return self
+
+    def __exit__(self, *args) -> None:
+        self.l2cap_server.close()

bumble/sdp.py

@@ -19,6 +19,7 @@ from __future__ import annotations
 import logging
 import struct
 from typing import Dict, List, Type, Optional, Tuple, Union, NewType, TYPE_CHECKING
+from typing_extensions import Self
 
 from . import core, l2cap
 from .colors import color
@@ -97,7 +98,8 @@ SDP_CLIENT_EXECUTABLE_URL_ATTRIBUTE_ID               = 0X000B
 SDP_ICON_URL_ATTRIBUTE_ID                            = 0X000C
 SDP_ADDITIONAL_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID = 0X000D
 
-# Attribute Identifier (cf. Assigned Numbers for Service Discovery)
+
+# Profile-specific Attribute Identifiers (cf. Assigned Numbers for Service Discovery)
 # used by AVRCP, HFP and A2DP
 SDP_SUPPORTED_FEATURES_ATTRIBUTE_ID = 0x0311
 
@@ -115,7 +117,8 @@ SDP_ATTRIBUTE_ID_NAMES = {
     SDP_DOCUMENTATION_URL_ATTRIBUTE_ID:                   'SDP_DOCUMENTATION_URL_ATTRIBUTE_ID',
     SDP_CLIENT_EXECUTABLE_URL_ATTRIBUTE_ID:               'SDP_CLIENT_EXECUTABLE_URL_ATTRIBUTE_ID',
     SDP_ICON_URL_ATTRIBUTE_ID:                            'SDP_ICON_URL_ATTRIBUTE_ID',
-    SDP_ADDITIONAL_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID: 'SDP_ADDITIONAL_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID'
+    SDP_ADDITIONAL_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID: 'SDP_ADDITIONAL_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID',
+    SDP_SUPPORTED_FEATURES_ATTRIBUTE_ID:                  'SDP_SUPPORTED_FEATURES_ATTRIBUTE_ID',
 }
 
 SDP_PUBLIC_BROWSE_ROOT = core.UUID.from_16_bits(0x1002, 'PublicBrowseRoot')
@@ -918,6 +921,13 @@ class Client:
 
         return ServiceAttribute.list_from_data_elements(attribute_list_sequence.value)
 
+    async def __aenter__(self) -> Self:
+        await self.connect()
+        return self
+
+    async def __aexit__(self, *args) -> None:
+        await self.disconnect()
+
 
 # -----------------------------------------------------------------------------
 class Server:

bumble/smp.py

@@ -1090,7 +1090,7 @@ class Session:
         # We can now encrypt the connection with the short term key, so that we can
         # distribute the long term and/or other keys over an encrypted connection
         self.manager.device.host.send_command_sync(
-            HCI_LE_Enable_Encryption_Command(  # type: ignore[call-arg]
+            HCI_LE_Enable_Encryption_Command(
                 connection_handle=self.connection.handle,
                 random_number=bytes(8),
                 encrypted_diversifier=0,
@@ -1134,8 +1134,10 @@ class Session:
 
     async def get_link_key_and_derive_ltk(self) -> None:
         '''Retrieves BR/EDR Link Key from storage and derive it to LE LTK.'''
-        link_key = await self.manager.device.get_link_key(self.connection.peer_address)
+        self.link_key = await self.manager.device.get_link_key(
-        if link_key is None:
+            self.connection.peer_address
+        )
+        if self.link_key is None:
             logging.warning(
                 'Try to derive LTK but host does not have the LK. Send a SMP_PAIRING_FAILED but the procedure will not be paused!'
             )
@@ -1143,7 +1145,7 @@ class Session:
                 SMP_CROSS_TRANSPORT_KEY_DERIVATION_NOT_ALLOWED_ERROR
             )
         else:
-            self.ltk = self.derive_ltk(link_key, self.ct2)
+            self.ltk = self.derive_ltk(self.link_key, self.ct2)
 
     def distribute_keys(self) -> None:
         # Distribute the keys as required
@@ -1991,10 +1993,8 @@ class Manager(EventEmitter):
     ) -> None:
         # Store the keys in the key store
         if self.device.keystore and identity_address is not None:
-            self.device.abort_on(
+            # Make sure on_pairing emits after key update.
-                'flush', self.device.update_keys(str(identity_address), keys)
+            await self.device.update_keys(str(identity_address), keys)
-            )
-
         # Notify the device
         self.device.on_pairing(session.connection, identity_address, keys, session.sc)
 

bumble/transport/__init__.py

@@ -18,6 +18,7 @@
 from contextlib import asynccontextmanager
 import logging
 import os
+from typing import Optional
 
 from .common import Transport, AsyncPipeSink, SnoopingTransport
 from ..snoop import create_snooper
@@ -52,8 +53,16 @@ def _wrap_transport(transport: Transport) -> Transport:
 async def open_transport(name: str) -> Transport:
     """
     Open a transport by name.
-    The name must be <type>:<parameters>
+    The name must be <type>:<metadata><parameters>
-    Where <parameters> depend on the type (and may be empty for some types).
+    Where <parameters> depend on the type (and may be empty for some types), and
+    <metadata> is either omitted, or a ,-separated list of <key>=<value> pairs,
+    enclosed in [].
+    If there are not metadata or parameter, the : after the <type> may be omitted.
+    Examples:
+      * usb:0
+      * usb:[driver=rtk]0
+      * android-netsim
+
     The supported types are:
       * serial
       * udp
@@ -71,87 +80,105 @@ async def open_transport(name: str) -> Transport:
       * android-netsim
     """
 
-    return _wrap_transport(await _open_transport(name))
+    scheme, *tail = name.split(':', 1)
+    spec = tail[0] if tail else None
+    metadata = None
+    if spec:
+        # Metadata may precede the spec
+        if spec.startswith('['):
+            metadata_str, *tail = spec[1:].split(']')
+            spec = tail[0] if tail else None
+            metadata = dict([entry.split('=') for entry in metadata_str.split(',')])
+
+    transport = await _open_transport(scheme, spec)
+    if metadata:
+        transport.source.metadata = {  # type: ignore[attr-defined]
+            **metadata,
+            **getattr(transport.source, 'metadata', {}),
+        }
+        # pylint: disable=line-too-long
+        logger.debug(f'HCI metadata: {transport.source.metadata}')  # type: ignore[attr-defined]
+
+    return _wrap_transport(transport)
 
 
 # -----------------------------------------------------------------------------
-async def _open_transport(name: str) -> Transport:
+async def _open_transport(scheme: str, spec: Optional[str]) -> Transport:
     # pylint: disable=import-outside-toplevel
     # pylint: disable=too-many-return-statements
 
-    scheme, *spec = name.split(':', 1)
     if scheme == 'serial' and spec:
         from .serial import open_serial_transport
 
-        return await open_serial_transport(spec[0])
+        return await open_serial_transport(spec)
 
     if scheme == 'udp' and spec:
         from .udp import open_udp_transport
 
-        return await open_udp_transport(spec[0])
+        return await open_udp_transport(spec)
 
     if scheme == 'tcp-client' and spec:
         from .tcp_client import open_tcp_client_transport
 
-        return await open_tcp_client_transport(spec[0])
+        return await open_tcp_client_transport(spec)
 
     if scheme == 'tcp-server' and spec:
         from .tcp_server import open_tcp_server_transport
 
-        return await open_tcp_server_transport(spec[0])
+        return await open_tcp_server_transport(spec)
 
     if scheme == 'ws-client' and spec:
         from .ws_client import open_ws_client_transport
 
-        return await open_ws_client_transport(spec[0])
+        return await open_ws_client_transport(spec)
 
     if scheme == 'ws-server' and spec:
         from .ws_server import open_ws_server_transport
 
-        return await open_ws_server_transport(spec[0])
+        return await open_ws_server_transport(spec)
 
     if scheme == 'pty':
         from .pty import open_pty_transport
 
-        return await open_pty_transport(spec[0] if spec else None)
+        return await open_pty_transport(spec)
 
     if scheme == 'file':
         from .file import open_file_transport
 
         assert spec is not None
-        return await open_file_transport(spec[0])
+        return await open_file_transport(spec)
 
     if scheme == 'vhci':
         from .vhci import open_vhci_transport
 
-        return await open_vhci_transport(spec[0] if spec else None)
+        return await open_vhci_transport(spec)
 
     if scheme == 'hci-socket':
         from .hci_socket import open_hci_socket_transport
 
-        return await open_hci_socket_transport(spec[0] if spec else None)
+        return await open_hci_socket_transport(spec)
 
     if scheme == 'usb':
         from .usb import open_usb_transport
 
-        assert spec is not None
+        assert spec
-        return await open_usb_transport(spec[0])
+        return await open_usb_transport(spec)
 
     if scheme == 'pyusb':
         from .pyusb import open_pyusb_transport
 
-        assert spec is not None
+        assert spec
-        return await open_pyusb_transport(spec[0])
+        return await open_pyusb_transport(spec)
 
     if scheme == 'android-emulator':
         from .android_emulator import open_android_emulator_transport
 
-        return await open_android_emulator_transport(spec[0] if spec else None)
+        return await open_android_emulator_transport(spec)
 
     if scheme == 'android-netsim':
         from .android_netsim import open_android_netsim_transport
 
-        return await open_android_netsim_transport(spec[0] if spec else None)
+        return await open_android_netsim_transport(spec)
 
     raise ValueError('unknown transport scheme')
 
@@ -170,12 +197,13 @@ async def open_transport_or_link(name: str) -> Transport:
 
     """
     if name.startswith('link-relay:'):
+        logger.warning('Link Relay has been deprecated.')
         from ..controller import Controller
         from ..link import RemoteLink  # lazy import
 
         link = RemoteLink(name[11:])
         await link.wait_until_connected()
-        controller = Controller('remote', link=link)
+        controller = Controller('remote', link=link)  # type:ignore[arg-type]
 
         class LinkTransport(Transport):
             async def close(self):

bumble/transport/android_emulator.py

@@ -69,7 +69,7 @@ async def open_android_emulator_transport(spec: Optional[str]) -> Transport:
     mode = 'host'
     server_host = 'localhost'
     server_port = '8554'
-    if spec is not None:
+    if spec:
         params = spec.split(',')
         for param in params:
             if param.startswith('mode='):

bumble/transport/common.py

@@ -21,7 +21,7 @@ import struct
 import asyncio
 import logging
 import io
-from typing import ContextManager, Tuple, Optional, Protocol, Dict
+from typing import Any, ContextManager, Tuple, Optional, Protocol, Dict
 
 from bumble import hci
 from bumble.colors import color
@@ -42,6 +42,7 @@ HCI_PACKET_INFO: Dict[int, Tuple[int, int, str]] = {
     hci.HCI_ACL_DATA_PACKET: (2, 2, 'H'),
     hci.HCI_SYNCHRONOUS_DATA_PACKET: (1, 2, 'B'),
     hci.HCI_EVENT_PACKET: (1, 1, 'B'),
+    hci.HCI_ISO_DATA_PACKET: (2, 2, 'H'),
 }
 
 
@@ -167,11 +168,13 @@ class PacketReader:
 
     def __init__(self, source: io.BufferedReader) -> None:
         self.source = source
+        self.at_end = False
 
     def next_packet(self) -> Optional[bytes]:
         # Get the packet type
         packet_type = self.source.read(1)
         if len(packet_type) != 1:
+            self.at_end = True
             return None
 
         # Get the packet info based on its type

bumble/transport/hci_socket.py

@@ -59,10 +59,7 @@ async def open_hci_socket_transport(spec: Optional[str]) -> Transport:
         ) from error
 
     # Compute the adapter index
-    if spec is None:
+    adapter_index = int(spec) if spec else 0
-        adapter_index = 0
-    else:
-        adapter_index = int(spec)
 
     # Bind the socket
     # NOTE: since Python doesn't support binding with the required address format (yet),

bumble/transport/pyusb.py

@@ -113,9 +113,10 @@ async def open_pyusb_transport(spec: str) -> Transport:
             self.loop.call_soon_threadsafe(self.stop_event.set)
 
     class UsbPacketSource(asyncio.Protocol, ParserSource):
-        def __init__(self, device, sco_enabled):
+        def __init__(self, device, metadata, sco_enabled):
             super().__init__()
             self.device = device
+            self.metadata = metadata
             self.loop = asyncio.get_running_loop()
             self.queue = asyncio.Queue()
             self.dequeue_task = None
@@ -216,6 +217,15 @@ async def open_pyusb_transport(spec: str) -> Transport:
     if ':' in spec:
         vendor_id, product_id = spec.split(':')
         device = usb_find(idVendor=int(vendor_id, 16), idProduct=int(product_id, 16))
+    elif '-' in spec:
+
+        def device_path(device):
+            if device.port_numbers:
+                return f'{device.bus}-{".".join(map(str, device.port_numbers))}'
+            else:
+                return str(device.bus)
+
+        device = usb_find(custom_match=lambda device: device_path(device) == spec)
     else:
         device_index = int(spec)
         devices = list(
@@ -235,6 +245,9 @@ async def open_pyusb_transport(spec: str) -> Transport:
         raise ValueError('device not found')
     logger.debug(f'USB Device: {device}')
 
+    # Collect the metadata
+    device_metadata = {'vendor_id': device.idVendor, 'product_id': device.idProduct}
+
     # Detach the kernel driver if needed
     if device.is_kernel_driver_active(0):
         logger.debug("detaching kernel driver")
@@ -289,7 +302,7 @@ async def open_pyusb_transport(spec: str) -> Transport:
     #     except usb.USBError:
     #         logger.warning('failed to set alternate setting')
 
-    packet_source = UsbPacketSource(device, sco_enabled)
+    packet_source = UsbPacketSource(device, device_metadata, sco_enabled)
     packet_sink = UsbPacketSink(device)
     packet_source.start()
     packet_sink.start()

bumble/transport/usb.py

@@ -108,7 +108,7 @@ async def open_usb_transport(spec: str) -> Transport:
         USB_DEVICE_PROTOCOL_BLUETOOTH_PRIMARY_CONTROLLER,
     )
 
-    READ_SIZE = 1024
+    READ_SIZE = 4096
 
     class UsbPacketSink:
         def __init__(self, device, acl_out):
@@ -396,6 +396,16 @@ async def open_usb_transport(spec: str) -> Transport:
                         break
                     device_index -= 1
                 device.close()
+        elif '-' in spec:
+
+            def device_path(device):
+                return f'{device.getBusNumber()}-{".".join(map(str, device.getPortNumberList()))}'
+
+            for device in context.getDeviceIterator(skip_on_error=True):
+                if device_path(device) == spec:
+                    found = device
+                    break
+                device.close()
         else:
             # Look for a compatible device by index
             def device_is_bluetooth_hci(device):

bumble/utils.py

@@ -17,9 +17,10 @@
 # -----------------------------------------------------------------------------
 from __future__ import annotations
 import asyncio
-import logging
-import traceback
 import collections
+import enum
+import functools
+import logging
 import sys
 import warnings
 from typing import (
@@ -34,7 +35,7 @@ from typing import (
     Union,
     overload,
 )
-from functools import wraps, partial
+
 from pyee import EventEmitter
 
 from .colors import color
@@ -131,13 +132,14 @@ class EventWatcher:
         Args:
             emitter: EventEmitter to watch
             event: Event name
-            handler: (Optional) Event handler. When nothing is passed, this method works as a decorator.
+            handler: (Optional) Event handler. When nothing is passed, this method
+            works as a decorator.
         '''
 
-        def wrapper(f: _Handler) -> _Handler:
+        def wrapper(wrapped: _Handler) -> _Handler:
-            self.handlers.append((emitter, event, f))
+            self.handlers.append((emitter, event, wrapped))
-            emitter.on(event, f)
+            emitter.on(event, wrapped)
-            return f
+            return wrapped
 
         return wrapper if handler is None else wrapper(handler)
 
@@ -157,13 +159,14 @@ class EventWatcher:
         Args:
             emitter: EventEmitter to watch
             event: Event name
-            handler: (Optional) Event handler. When nothing passed, this method works as a decorator.
+            handler: (Optional) Event handler. When nothing passed, this method works
+            as a decorator.
         '''
 
-        def wrapper(f: _Handler) -> _Handler:
+        def wrapper(wrapped: _Handler) -> _Handler:
-            self.handlers.append((emitter, event, f))
+            self.handlers.append((emitter, event, wrapped))
-            emitter.once(event, f)
+            emitter.once(event, wrapped)
-            return f
+            return wrapped
 
         return wrapper if handler is None else wrapper(handler)
 
@@ -223,13 +226,13 @@ class CompositeEventEmitter(AbortableEventEmitter):
         if self._listener:
             # Call the deregistration methods for each base class that has them
             for cls in self._listener.__class__.mro():
-                if hasattr(cls, '_bumble_register_composite'):
+                if '_bumble_register_composite' in cls.__dict__:
-                    cls._bumble_deregister_composite(listener, self)
+                    cls._bumble_deregister_composite(self._listener, self)
         self._listener = listener
         if listener:
             # Call the registration methods for each base class that has them
             for cls in listener.__class__.mro():
-                if hasattr(cls, '_bumble_deregister_composite'):
+                if '_bumble_deregister_composite' in cls.__dict__:
                     cls._bumble_register_composite(listener, self)
 
 
@@ -276,21 +279,18 @@ class AsyncRunner:
         """
 
         def decorator(func):
-            @wraps(func)
+            @functools.wraps(func)
             def wrapper(*args, **kwargs):
                 coroutine = func(*args, **kwargs)
                 if queue is None:
-                    # Create a task to run the coroutine
+                    # Spawn the coroutine as a task
                     async def run():
                         try:
                             await coroutine
                         except Exception:
-                            logger.warning(
+                            logger.exception(color("!!! Exception in wrapper:", "red"))
-                                f'{color("!!! Exception in wrapper:", "red")} '
-                                f'{traceback.format_exc()}'
-                            )
 
-                    asyncio.create_task(run())
+                    AsyncRunner.spawn(run())
                 else:
                     # Queue the coroutine to be awaited by the work queue
                     queue.enqueue(coroutine)
@@ -413,30 +413,35 @@ class FlowControlAsyncPipe:
             self.check_pump()
 
 
+# -----------------------------------------------------------------------------
 async def async_call(function, *args, **kwargs):
     """
-    Immediately calls the function with provided args and kwargs, wrapping it in an async function.
+    Immediately calls the function with provided args and kwargs, wrapping it in an
-    Rust's `pyo3_asyncio` library needs functions to be marked async to properly inject a running loop.
+    async function.
+    Rust's `pyo3_asyncio` library needs functions to be marked async to properly inject
+    a running loop.
 
     result = await async_call(some_function, ...)
     """
     return function(*args, **kwargs)
 
 
+# -----------------------------------------------------------------------------
 def wrap_async(function):
     """
     Wraps the provided function in an async function.
     """
-    return partial(async_call, function)
+    return functools.partial(async_call, function)
 
 
+# -----------------------------------------------------------------------------
 def deprecated(msg: str):
     """
     Throw deprecation warning before execution.
     """
 
     def wrapper(function):
-        @wraps(function)
+        @functools.wraps(function)
         def inner(*args, **kwargs):
             warnings.warn(msg, DeprecationWarning)
             return function(*args, **kwargs)
@@ -446,13 +451,14 @@ def deprecated(msg: str):
     return wrapper
 
 
+# -----------------------------------------------------------------------------
 def experimental(msg: str):
     """
     Throws a future warning before execution.
     """
 
     def wrapper(function):
-        @wraps(function)
+        @functools.wraps(function)
         def inner(*args, **kwargs):
             warnings.warn(msg, FutureWarning)
             return function(*args, **kwargs)
@@ -460,3 +466,22 @@ def experimental(msg: str):
         return inner
 
     return wrapper
+
+
+# -----------------------------------------------------------------------------
+class OpenIntEnum(enum.IntEnum):
+    """
+    Subclass of enum.IntEnum that can hold integer values outside the set of
+    predefined values. This is convenient for implementing protocols where some
+    integer constants may be added over time.
+    """
+
+    @classmethod
+    def _missing_(cls, value):
+        if not isinstance(value, int):
+            return None
+
+        obj = int.__new__(cls, value)
+        obj._value_ = value
+        obj._name_ = f"{cls.__name__}[{value}]"
+        return obj

docs/mkdocs/src/apps_and_tools/bench.md

@@ -7,16 +7,36 @@ throughput and/or latency between two devices.
 # General Usage
 
 ```
-Usage: bench.py [OPTIONS] COMMAND [ARGS]...
+Usage: bumble-bench [OPTIONS] COMMAND [ARGS]...
 
 Options:
   --device-config FILENAME        Device configuration file
   --role [sender|receiver|ping|pong]
   --mode [gatt-client|gatt-server|l2cap-client|l2cap-server|rfcomm-client|rfcomm-server]
   --att-mtu MTU                   GATT MTU (gatt-client mode)  [23<=x<=517]
-  -s, --packet-size SIZE          Packet size (server role)  [8<=x<=4096]
+  --extended-data-length TEXT     Request a data length upon connection,
-  -c, --packet-count COUNT        Packet count (server role)
+                                  specified as tx_octets/tx_time
-  -sd, --start-delay SECONDS      Start delay (server role)
+  --rfcomm-channel INTEGER        RFComm channel to use
+  --rfcomm-uuid TEXT              RFComm service UUID to use (ignored if
+                                  --rfcomm-channel is not 0)
+  --l2cap-psm INTEGER             L2CAP PSM to use
+  --l2cap-mtu INTEGER             L2CAP MTU to use
+  --l2cap-mps INTEGER             L2CAP MPS to use
+  --l2cap-max-credits INTEGER     L2CAP maximum number of credits allowed for
+                                  the peer
+  -s, --packet-size SIZE          Packet size (client or ping role)
+                                  [8<=x<=4096]
+  -c, --packet-count COUNT        Packet count (client or ping role)
+  -sd, --start-delay SECONDS      Start delay (client or ping role)
+  --repeat N                      Repeat the run N times (client and ping
+                                  roles)(0, which is the fault, to run just
+                                  once)
+  --repeat-delay SECONDS          Delay, in seconds, between repeats
+  --pace MILLISECONDS             Wait N milliseconds between packets (0,
+                                  which is the fault, to send as fast as
+                                  possible)
+  --linger                        Don't exit at the end of a run (server and
+                                  pong roles)
   --help                          Show this message and exit.
 
 Commands:
@@ -35,10 +55,11 @@ Options:
   --connection-interval, --ci CONNECTION_INTERVAL
                                   Connection interval (in ms)
   --phy [1m|2m|coded]             PHY to use
+  --authenticate                  Authenticate (RFComm only)
+  --encrypt                       Encrypt the connection (RFComm only)
   --help                          Show this message and exit.
 ```
 
-
 To test once device against another, one of the two devices must be running
 the ``peripheral`` command and the other the ``central`` command. The device
 running the ``peripheral`` command will accept connections from the device

docs/mkdocs/src/apps_and_tools/hci_bridge.md

@@ -12,12 +12,25 @@ a host that send custom HCI commands that the controller may not understand.
     ```
     python hci_bridge.py <host-transport-spec> <controller-transport-spec> [command-short-circuit-list]
     ```
+    The command-short-circuit-list field is specified by a series of comma separated Opcode Group 
+    Field (OGF) : OpCode Command Field (OCF) pairs. The OGF/OCF values are specified in the Blutooth
+    core specification.
+
+    For the commands that are listed in the short-circuit-list, the HCI bridge will always generate
+    a Command Complete Event for the specified op code. The return parameter will be HCI_SUCCESS.
+
+    This feature can only be used for commands that return Command Complete. Other events will not be
+    generated by the HCI bridge tool.
 
 !!! example "UDP to Serial"
     ```
     python hci_bridge.py udp:0.0.0.0:9000,127.0.0.1:9001 serial:/dev/tty.usbmodem0006839912171,1000000 0x3f:0x0070,0x3f:0x0074,0x3f:0x0077,0x3f:0x0078
     ```
 
+    In this example, the short circuit list is specified to respond to the Vendor-specific Opcode Group 
+    Field (0x3f) commands 0x70, 0x74, 0x77, 0x78 with Command Complete. The short circuit list can be
+    used where the Host uses some HCI commands that are not supported/implemented by the Controller.
+
 !!! example "PTY to Link Relay"
     ```
     python hci_bridge.py serial:emulated_uart_pty,1000000 link-relay:ws://127.0.0.1:10723/test
@@ -28,3 +41,4 @@ a host that send custom HCI commands that the controller may not understand.
     (through which the communication with other virtual controllers will be mediated).
 
     NOTE: this assumes you're running a Link Relay on port `10723`.
+

docs/mkdocs/src/drivers/index.md

@@ -5,6 +5,15 @@ Some Bluetooth controllers require a driver to function properly.
 This may include, for instance, loading a Firmware image or patch,
 loading a configuration.
 
+By default, drivers will be automatically probed to determine if they should be
+used with particular HCI controller.
+When the transport for an HCI controller is instantiated from a transport name,
+a driver may also be forced by specifying ``driver=<driver-name>`` in the optional
+metadata portion of the transport name. For example,
+``usb:[driver=rtk]0`` indicates that the ``rtk`` driver should be used with the
+first USB device, even if a normal probe would not have selected it based on the
+USB vendor ID and product ID.
+
 Drivers included in the module are:
 
   * [Realtek](realtek.md): Loading of Firmware and Config for Realtek USB dongles.

docs/mkdocs/src/drivers/realtek.md

@@ -4,10 +4,13 @@ REALTEK DRIVER
 This driver supports loading firmware images and optional config data to
 USB dongles with a Realtek chipset.
 A number of USB dongles are supported, but likely not all.
-When using a USB dongle, the USB product ID and manufacturer ID are used
+When using a USB dongle, the USB product ID and vendor ID are used
 to find whether a matching set of firmware image and config data
 is needed for that specific model. If a match exists, the driver will try
 load the firmware image and, if needed, config data.
+Alternatively, the metadata property ``driver=rtk`` may be specified in a transport
+name to force that driver to be used (ex: ``usb:[driver=rtk]0`` instead of just
+``usb:0`` for the first USB device).
 The driver will look for those files by name, in order, in:
 
   * The directory specified by the environment variable `BUMBLE_RTK_FIRMWARE_DIR`

docs/mkdocs/src/transports/usb.md

@@ -10,6 +10,7 @@ The moniker for a USB transport is either:
   * `usb:<vendor>:<product>`
   * `usb:<vendor>:<product>/<serial-number>`
   * `usb:<vendor>:<product>#<index>`
+  * `usb:<bus>-<port_numbers>`
 
 with `<index>` as a 0-based index (0 being the first one) to select amongst all the matching devices when there are more than one.
 In the `usb:<index>` form, matching devices are the ones supporting Bluetooth HCI, as declared by their Class, Subclass and Protocol.
@@ -17,6 +18,8 @@ In the `usb:<vendor>:<product>#<index>` form, matching devices are the ones with
 
 `<vendor>` and `<product>` are a vendor ID and product ID in hexadecimal.
 
+with `<port_numbers>` as a list of all port numbers from root separated with dots `.`
+
 In addition, if the moniker ends with the symbol "!", the device will be used in "forced" mode:
 the first USB interface of the device will be used, regardless of the interface class/subclass.
 This may be useful for some devices that use a custom class/subclass but may nonetheless work as-is.
@@ -37,6 +40,9 @@ This may be useful for some devices that use a custom class/subclass but may non
     `usb:0B05:17CB!`
     The BT USB dongle vendor=0B05 and product=17CB, in "forced" mode.
 
+    `usb:3-3.4.1`
+    The BT USB dongle on bus 3 on port path 3, 4, 1.
+
 
 ## Alternative
 The library includes two different implementations of the USB transport, implemented using different python bindings for `libusb`.

examples/avrcp_as_sink.html

@@ -0,0 +1,274 @@
+<html>
+
+<head>
+    <style>
+        * {
+            font-family: sans-serif;
+        }
+    </style>
+</head>
+<body>
+    Server Port <input id="port" type="text" value="8989"></input> <button id="connectButton" onclick="connect()">Connect</button><br>
+    <div id="socketState"></div>
+    <br>
+    <div id="buttons"></div><br>
+    <hr>
+    <button onclick="onGetPlayStatusButtonClicked()">Get Play Status</button><br>
+    <div id="getPlayStatusResponseTable"></div>
+    <hr>
+    <button onclick="onGetElementAttributesButtonClicked()">Get Element Attributes</button><br>
+    <div id="getElementAttributesResponseTable"></div>
+    <hr>
+    <table>
+        <tr>
+            <b>VOLUME</b>:
+            <button onclick="onVolumeDownButtonClicked()">-</button>
+            <button onclick="onVolumeUpButtonClicked()">+</button>&nbsp;
+            <span id="volumeText"></span><br>
+        </tr>
+        <tr>
+            <td><b>PLAYBACK STATUS</b></td><td><span id="playbackStatusText"></span></td>
+        </tr>
+        <tr>
+            <td><b>POSITION</b></td><td><span id="positionText"></span></td>
+        </tr>
+        <tr>
+            <td><b>TRACK</b></td><td><span id="trackText"></span></td>
+        </tr>
+        <tr>
+            <td><b>ADDRESSED PLAYER</b></td><td><span id="addressedPlayerText"></span></td>
+        </tr>
+        <tr>
+            <td><b>UID COUNTER</b></td><td><span id="uidCounterText"></span></td>
+        </tr>
+        <tr>
+            <td><b>SUPPORTED EVENTS</b></td><td><span id="supportedEventsText"></span></td>
+        </tr>
+        <tr>
+            <td><b>PLAYER SETTINGS</b></td><td><div id="playerSettingsTable"></div></td>
+        </tr>
+    </table>
+    <script>
+        const portInput = document.getElementById("port")
+        const connectButton = document.getElementById("connectButton")
+        const socketState = document.getElementById("socketState")
+        const volumeText = document.getElementById("volumeText")
+        const positionText = document.getElementById("positionText")
+        const trackText = document.getElementById("trackText")
+        const playbackStatusText = document.getElementById("playbackStatusText")
+        const addressedPlayerText = document.getElementById("addressedPlayerText")
+        const uidCounterText = document.getElementById("uidCounterText")
+        const supportedEventsText = document.getElementById("supportedEventsText")
+        const playerSettingsTable = document.getElementById("playerSettingsTable")
+        const getPlayStatusResponseTable = document.getElementById("getPlayStatusResponseTable")
+        const getElementAttributesResponseTable = document.getElementById("getElementAttributesResponseTable")
+        let socket
+        let volume = 0
+
+        const keyNames = [
+            "SELECT",
+            "UP",
+            "DOWN",
+            "LEFT",
+            "RIGHT",
+            "RIGHT_UP",
+            "RIGHT_DOWN",
+            "LEFT_UP",
+            "LEFT_DOWN",
+            "ROOT_MENU",
+            "SETUP_MENU",
+            "CONTENTS_MENU",
+            "FAVORITE_MENU",
+            "EXIT",
+            "NUMBER_0",
+            "NUMBER_1",
+            "NUMBER_2",
+            "NUMBER_3",
+            "NUMBER_4",
+            "NUMBER_5",
+            "NUMBER_6",
+            "NUMBER_7",
+            "NUMBER_8",
+            "NUMBER_9",
+            "DOT",
+            "ENTER",
+            "CLEAR",
+            "CHANNEL_UP",
+            "CHANNEL_DOWN",
+            "PREVIOUS_CHANNEL",
+            "SOUND_SELECT",
+            "INPUT_SELECT",
+            "DISPLAY_INFORMATION",
+            "HELP",
+            "PAGE_UP",
+            "PAGE_DOWN",
+            "POWER",
+            "VOLUME_UP",
+            "VOLUME_DOWN",
+            "MUTE",
+            "PLAY",
+            "STOP",
+            "PAUSE",
+            "RECORD",
+            "REWIND",
+            "FAST_FORWARD",
+            "EJECT",
+            "FORWARD",
+            "BACKWARD",
+            "ANGLE",
+            "SUBPICTURE",
+            "F1",
+            "F2",
+            "F3",
+            "F4",
+            "F5",
+        ]
+
+        document.addEventListener('keydown', onKeyDown)
+        document.addEventListener('keyup', onKeyUp)
+
+        const buttons = document.getElementById("buttons")
+        keyNames.forEach(name => {
+            const button = document.createElement("BUTTON")
+            button.appendChild(document.createTextNode(name))
+            button.addEventListener("mousedown", event => {
+                send({type: 'send-key-down', key: name})
+            })
+            button.addEventListener("mouseup", event => {
+                send({type: 'send-key-up', key: name})
+            })
+            buttons.appendChild(button)
+        })
+
+        updateVolume(0)
+
+        function connect() {
+            socket = new WebSocket(`ws://localhost:${portInput.value}`);
+            socket.onopen = _ => {
+                socketState.innerText = 'OPEN'
+                connectButton.disabled = true
+            }
+            socket.onclose = _ => {
+                socketState.innerText = 'CLOSED'
+                connectButton.disabled = false
+            }
+            socket.onerror = (error) => {
+                socketState.innerText = 'ERROR'
+                console.log(`ERROR: ${error}`)
+                connectButton.disabled = false
+            }
+            socket.onmessage = (message) => {
+                onMessage(JSON.parse(message.data))
+            }
+        }
+
+        function send(message) {
+            if (socket && socket.readyState == WebSocket.OPEN) {
+                socket.send(JSON.stringify(message))
+            }
+        }
+
+        function hmsText(position) {
+            const h_1 = 1000 * 60 * 60
+            const h = Math.floor(position / h_1)
+            position -= h * h_1
+            const m_1 = 1000 * 60
+            const m = Math.floor(position / m_1)
+            position -= m * m_1
+            const s_1 = 1000
+            const s = Math.floor(position / s_1)
+            position -= s * s_1
+
+            return `${h}:${m.toString().padStart(2, "0")}:${s.toString().padStart(2, "0")}:${position}`
+        }
+
+        function setTableHead(table, columns) {
+            let thead = table.createTHead()
+            let row = thead.insertRow()
+            for (let column of columns) {
+                let th = document.createElement("th")
+                let text = document.createTextNode(column)
+                th.appendChild(text)
+                row.appendChild(th)
+            }
+        }
+
+        function createTable(rows) {
+            const table = document.createElement("table")
+
+            if (rows.length != 0) {
+                columns = Object.keys(rows[0])
+                setTableHead(table, columns)
+            }
+            for (let element of rows) {
+                let row = table.insertRow()
+                for (key in element) {
+                    let cell = row.insertCell()
+                    let text = document.createTextNode(element[key])
+                    cell.appendChild(text)
+                }
+            }
+            return table
+        }
+
+        function onMessage(message) {
+            console.log(message)
+            if (message.type == "set-volume") {
+                updateVolume(message.params.volume)
+            } else if (message.type == "supported-events") {
+                supportedEventsText.innerText = JSON.stringify(message.params.events)
+            } else if (message.type == "playback-position-changed") {
+                positionText.innerText = hmsText(message.params.position)
+            } else if (message.type == "playback-status-changed") {
+                playbackStatusText.innerText = message.params.status
+            } else if (message.type == "player-settings-changed") {
+                playerSettingsTable.replaceChildren(message.params.settings)
+            } else if (message.type == "track-changed") {
+                trackText.innerText = message.params.identifier
+            } else if (message.type == "addressed-player-changed") {
+                addressedPlayerText.innerText = JSON.stringify(message.params.player)
+            } else if (message.type == "uids-changed") {
+                uidCounterText.innerText = message.params.uid_counter
+            } else if (message.type == "get-play-status-response") {
+                getPlayStatusResponseTable.replaceChildren(message.params)
+            } else if (message.type == "get-element-attributes-response") {
+                getElementAttributesResponseTable.replaceChildren(createTable(message.params))
+            }
+        }
+
+        function updateVolume(newVolume) {
+            volume = newVolume
+            volumeText.innerText = `${volume} (${Math.round(100*volume/0x7F)}%)`
+        }
+
+        function onKeyDown(event) {
+            console.log(event)
+            send({ type: 'send-key-down', key: event.key })
+        }
+
+        function onKeyUp(event) {
+            console.log(event)
+            send({ type: 'send-key-up', key: event.key })
+        }
+
+        function onVolumeUpButtonClicked() {
+            updateVolume(Math.min(volume + 5, 0x7F))
+            send({ type: 'set-volume', volume })
+        }
+
+        function onVolumeDownButtonClicked() {
+            updateVolume(Math.max(volume - 5, 0))
+            send({ type: 'set-volume', volume })
+        }
+
+        function onGetPlayStatusButtonClicked() {
+            send({ type: 'get-play-status', volume })
+        }
+
+        function onGetElementAttributesButtonClicked() {
+            send({ type: 'get-element-attributes' })
+        }
+</script>
+</body>
+
+</html>

examples/hid_keyboard.json

@@ -0,0 +1,5 @@
+{
+    "name": "Bumble HID Keyboard",
+    "class_of_device": 9664,
+    "keystore": "JsonKeyStore"
+}

examples/keyboard.html

@@ -40,9 +40,9 @@
                 }
             }
             function onMouseMove(event) {
-                //console.log(event.clientX, event.clientY)
+                //console.log(event.movementX, event.movementY)
-                mouseInfo.innerText = `MOUSE: x=${event.clientX}, y=${event.clientY}`
+                mouseInfo.innerText = `MOUSE: x=${event.movementX}, y=${event.movementY}`
-                send({ type:'mousemove', x: event.clientX, y: event.clientY })
+                send({ type:'mousemove', x: event.movementX, y: event.movementY })
             }
 
             function onKeyDown(event) {

examples/leaudio.json

@@ -1,5 +1,7 @@
 {
     "name": "Bumble-LEA",
     "keystore": "JsonKeyStore",
+    "address": "F0:F1:F2:F3:F4:FA",
+    "class_of_device": 2376708,
     "advertising_interval": 100
 }

examples/leaudio_with_classic.json

@@ -0,0 +1,9 @@
+{
+    "name": "Bumble-LEA",
+    "keystore": "JsonKeyStore",
+    "address": "F0:F1:F2:F3:F4:FA",
+    "classic_enabled": true,
+    "cis_enabled": true,
+    "class_of_device": 2376708,
+    "advertising_interval": 100
+}

examples/run_a2dp_source.py

@@ -74,7 +74,7 @@ def codec_capabilities():
 # -----------------------------------------------------------------------------
 def on_avdtp_connection(read_function, protocol):
     packet_source = SbcPacketSource(
-        read_function, protocol.l2cap_channel.mtu, codec_capabilities()
+        read_function, protocol.l2cap_channel.peer_mtu, codec_capabilities()
     )
     packet_pump = MediaPacketPump(packet_source.packets)
     protocol.add_source(packet_source.codec_capabilities, packet_pump)
@@ -98,7 +98,7 @@ async def stream_packets(read_function, protocol):
 
     # Stream the packets
     packet_source = SbcPacketSource(
-        read_function, protocol.l2cap_channel.mtu, codec_capabilities()
+        read_function, protocol.l2cap_channel.peer_mtu, codec_capabilities()
     )
     packet_pump = MediaPacketPump(packet_source.packets)
     source = protocol.add_source(packet_source.codec_capabilities, packet_pump)

examples/run_advertiser.py

@@ -19,9 +19,11 @@ import asyncio
 import logging
 import sys
 import os
+import struct
+
+from bumble.core import AdvertisingData
 from bumble.device import AdvertisingType, Device
 from bumble.hci import Address
-
 from bumble.transport import open_transport_or_link
 
 
@@ -52,6 +54,16 @@ async def main():
         print('<<< connected')
 
         device = Device.from_config_file_with_hci(sys.argv[1], hci_source, hci_sink)
+
+        if advertising_type.is_scannable:
+            device.scan_response_data = bytes(
+                AdvertisingData(
+                    [
+                        (AdvertisingData.APPEARANCE, struct.pack('<H', 0x0340)),
+                    ]
+                )
+            )
+
         await device.power_on()
         await device.start_advertising(advertising_type=advertising_type, target=target)
         await hci_source.wait_for_termination()

examples/run_avrcp.py

@@ -0,0 +1,408 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+from __future__ import annotations
+import asyncio
+import json
+import sys
+import os
+import logging
+import websockets
+
+from bumble.device import Device
+from bumble.transport import open_transport_or_link
+from bumble.core import BT_BR_EDR_TRANSPORT
+from bumble import avc
+from bumble import avrcp
+from bumble import avdtp
+from bumble import a2dp
+from bumble import utils
+
+
+logger = logging.getLogger(__name__)
+
+
+# -----------------------------------------------------------------------------
+def sdp_records():
+    a2dp_sink_service_record_handle = 0x00010001
+    avrcp_controller_service_record_handle = 0x00010002
+    avrcp_target_service_record_handle = 0x00010003
+    # pylint: disable=line-too-long
+    return {
+        a2dp_sink_service_record_handle: a2dp.make_audio_sink_service_sdp_records(
+            a2dp_sink_service_record_handle
+        ),
+        avrcp_controller_service_record_handle: avrcp.make_controller_service_sdp_records(
+            avrcp_controller_service_record_handle
+        ),
+        avrcp_target_service_record_handle: avrcp.make_target_service_sdp_records(
+            avrcp_controller_service_record_handle
+        ),
+    }
+
+
+# -----------------------------------------------------------------------------
+def codec_capabilities():
+    return avdtp.MediaCodecCapabilities(
+        media_type=avdtp.AVDTP_AUDIO_MEDIA_TYPE,
+        media_codec_type=a2dp.A2DP_SBC_CODEC_TYPE,
+        media_codec_information=a2dp.SbcMediaCodecInformation.from_lists(
+            sampling_frequencies=[48000, 44100, 32000, 16000],
+            channel_modes=[
+                a2dp.SBC_MONO_CHANNEL_MODE,
+                a2dp.SBC_DUAL_CHANNEL_MODE,
+                a2dp.SBC_STEREO_CHANNEL_MODE,
+                a2dp.SBC_JOINT_STEREO_CHANNEL_MODE,
+            ],
+            block_lengths=[4, 8, 12, 16],
+            subbands=[4, 8],
+            allocation_methods=[
+                a2dp.SBC_LOUDNESS_ALLOCATION_METHOD,
+                a2dp.SBC_SNR_ALLOCATION_METHOD,
+            ],
+            minimum_bitpool_value=2,
+            maximum_bitpool_value=53,
+        ),
+    )
+
+
+# -----------------------------------------------------------------------------
+def on_avdtp_connection(server):
+    # Add a sink endpoint to the server
+    sink = server.add_sink(codec_capabilities())
+    sink.on('rtp_packet', on_rtp_packet)
+
+
+# -----------------------------------------------------------------------------
+def on_rtp_packet(packet):
+    print(f'RTP: {packet}')
+
+
+# -----------------------------------------------------------------------------
+def on_avrcp_start(avrcp_protocol: avrcp.Protocol, websocket_server: WebSocketServer):
+    async def get_supported_events():
+        events = await avrcp_protocol.get_supported_events()
+        print("SUPPORTED EVENTS:", events)
+        websocket_server.send_message(
+            {
+                "type": "supported-events",
+                "params": {"events": [event.name for event in events]},
+            }
+        )
+
+        if avrcp.EventId.TRACK_CHANGED in events:
+            utils.AsyncRunner.spawn(monitor_track_changed())
+
+        if avrcp.EventId.PLAYBACK_STATUS_CHANGED in events:
+            utils.AsyncRunner.spawn(monitor_playback_status())
+
+        if avrcp.EventId.PLAYBACK_POS_CHANGED in events:
+            utils.AsyncRunner.spawn(monitor_playback_position())
+
+        if avrcp.EventId.PLAYER_APPLICATION_SETTING_CHANGED in events:
+            utils.AsyncRunner.spawn(monitor_player_application_settings())
+
+        if avrcp.EventId.AVAILABLE_PLAYERS_CHANGED in events:
+            utils.AsyncRunner.spawn(monitor_available_players())
+
+        if avrcp.EventId.ADDRESSED_PLAYER_CHANGED in events:
+            utils.AsyncRunner.spawn(monitor_addressed_player())
+
+        if avrcp.EventId.UIDS_CHANGED in events:
+            utils.AsyncRunner.spawn(monitor_uids())
+
+        if avrcp.EventId.VOLUME_CHANGED in events:
+            utils.AsyncRunner.spawn(monitor_volume())
+
+    utils.AsyncRunner.spawn(get_supported_events())
+
+    async def monitor_track_changed():
+        async for identifier in avrcp_protocol.monitor_track_changed():
+            print("TRACK CHANGED:", identifier.hex())
+            websocket_server.send_message(
+                {"type": "track-changed", "params": {"identifier": identifier.hex()}}
+            )
+
+    async def monitor_playback_status():
+        async for playback_status in avrcp_protocol.monitor_playback_status():
+            print("PLAYBACK STATUS CHANGED:", playback_status.name)
+            websocket_server.send_message(
+                {
+                    "type": "playback-status-changed",
+                    "params": {"status": playback_status.name},
+                }
+            )
+
+    async def monitor_playback_position():
+        async for playback_position in avrcp_protocol.monitor_playback_position(
+            playback_interval=1
+        ):
+            print("PLAYBACK POSITION CHANGED:", playback_position)
+            websocket_server.send_message(
+                {
+                    "type": "playback-position-changed",
+                    "params": {"position": playback_position},
+                }
+            )
+
+    async def monitor_player_application_settings():
+        async for settings in avrcp_protocol.monitor_player_application_settings():
+            print("PLAYER APPLICATION SETTINGS:", settings)
+            settings_as_dict = [
+                {"attribute": setting.attribute_id.name, "value": setting.value_id.name}
+                for setting in settings
+            ]
+            websocket_server.send_message(
+                {
+                    "type": "player-settings-changed",
+                    "params": {"settings": settings_as_dict},
+                }
+            )
+
+    async def monitor_available_players():
+        async for _ in avrcp_protocol.monitor_available_players():
+            print("AVAILABLE PLAYERS CHANGED")
+            websocket_server.send_message(
+                {"type": "available-players-changed", "params": {}}
+            )
+
+    async def monitor_addressed_player():
+        async for player in avrcp_protocol.monitor_addressed_player():
+            print("ADDRESSED PLAYER CHANGED")
+            websocket_server.send_message(
+                {
+                    "type": "addressed-player-changed",
+                    "params": {
+                        "player": {
+                            "player_id": player.player_id,
+                            "uid_counter": player.uid_counter,
+                        }
+                    },
+                }
+            )
+
+    async def monitor_uids():
+        async for uid_counter in avrcp_protocol.monitor_uids():
+            print("UIDS CHANGED")
+            websocket_server.send_message(
+                {
+                    "type": "uids-changed",
+                    "params": {
+                        "uid_counter": uid_counter,
+                    },
+                }
+            )
+
+    async def monitor_volume():
+        async for volume in avrcp_protocol.monitor_volume():
+            print("VOLUME CHANGED:", volume)
+            websocket_server.send_message(
+                {"type": "volume-changed", "params": {"volume": volume}}
+            )
+
+
+# -----------------------------------------------------------------------------
+class WebSocketServer:
+    def __init__(
+        self, avrcp_protocol: avrcp.Protocol, avrcp_delegate: Delegate
+    ) -> None:
+        self.socket = None
+        self.delegate = None
+        self.avrcp_protocol = avrcp_protocol
+        self.avrcp_delegate = avrcp_delegate
+
+    async def start(self) -> None:
+        # pylint: disable-next=no-member
+        await websockets.serve(self.serve, 'localhost', 8989)  # type: ignore
+
+    async def serve(self, socket, _path) -> None:
+        print('### WebSocket connected')
+        self.socket = socket
+        while True:
+            try:
+                message = await socket.recv()
+                print('Received: ', str(message))
+
+                parsed = json.loads(message)
+                message_type = parsed['type']
+                if message_type == 'send-key-down':
+                    await self.on_send_key_down(parsed)
+                elif message_type == 'send-key-up':
+                    await self.on_send_key_up(parsed)
+                elif message_type == 'set-volume':
+                    await self.on_set_volume(parsed)
+                elif message_type == 'get-play-status':
+                    await self.on_get_play_status()
+                elif message_type == 'get-element-attributes':
+                    await self.on_get_element_attributes()
+            except websockets.exceptions.ConnectionClosedOK:
+                self.socket = None
+                break
+
+    async def on_send_key_down(self, message: dict) -> None:
+        key = avc.PassThroughFrame.OperationId[message["key"]]
+        await self.avrcp_protocol.send_key_event(key, True)
+
+    async def on_send_key_up(self, message: dict) -> None:
+        key = avc.PassThroughFrame.OperationId[message["key"]]
+        await self.avrcp_protocol.send_key_event(key, False)
+
+    async def on_set_volume(self, message: dict) -> None:
+        volume = message["volume"]
+        self.avrcp_delegate.volume = volume
+        self.avrcp_protocol.notify_volume_changed(volume)
+
+    async def on_get_play_status(self) -> None:
+        play_status = await self.avrcp_protocol.get_play_status()
+        self.send_message(
+            {
+                "type": "get-play-status-response",
+                "params": {
+                    "song_length": play_status.song_length,
+                    "song_position": play_status.song_position,
+                    "play_status": play_status.play_status.name,
+                },
+            }
+        )
+
+    async def on_get_element_attributes(self) -> None:
+        attributes = await self.avrcp_protocol.get_element_attributes(
+            0,
+            [
+                avrcp.MediaAttributeId.TITLE,
+                avrcp.MediaAttributeId.ARTIST_NAME,
+                avrcp.MediaAttributeId.ALBUM_NAME,
+                avrcp.MediaAttributeId.TRACK_NUMBER,
+                avrcp.MediaAttributeId.TOTAL_NUMBER_OF_TRACKS,
+                avrcp.MediaAttributeId.GENRE,
+                avrcp.MediaAttributeId.PLAYING_TIME,
+                avrcp.MediaAttributeId.DEFAULT_COVER_ART,
+            ],
+        )
+        self.send_message(
+            {
+                "type": "get-element-attributes-response",
+                "params": [
+                    {
+                        "attribute_id": attribute.attribute_id.name,
+                        "attribute_value": attribute.attribute_value,
+                    }
+                    for attribute in attributes
+                ],
+            }
+        )
+
+    def send_message(self, message: dict) -> None:
+        if self.socket is None:
+            print("no socket, dropping message")
+            return
+        serialized = json.dumps(message)
+        utils.AsyncRunner.spawn(self.socket.send(serialized))
+
+
+# -----------------------------------------------------------------------------
+class Delegate(avrcp.Delegate):
+    def __init__(self):
+        super().__init__(
+            [avrcp.EventId.VOLUME_CHANGED, avrcp.EventId.PLAYBACK_STATUS_CHANGED]
+        )
+        self.websocket_server = None
+
+    async def set_absolute_volume(self, volume: int) -> None:
+        await super().set_absolute_volume(volume)
+        if self.websocket_server is not None:
+            self.websocket_server.send_message(
+                {"type": "set-volume", "params": {"volume": volume}}
+            )
+
+
+# -----------------------------------------------------------------------------
+async def main():
+    if len(sys.argv) < 3:
+        print(
+            'Usage: run_avrcp_controller.py <device-config> <transport-spec> '
+            '<sbc-file> [<bt-addr>]'
+        )
+        print('example: run_avrcp_controller.py classic1.json usb:0')
+        return
+
+    print('<<< connecting to HCI...')
+    async with await open_transport_or_link(sys.argv[2]) as (hci_source, hci_sink):
+        print('<<< connected')
+
+        # Create a device
+        device = Device.from_config_file_with_hci(sys.argv[1], hci_source, hci_sink)
+        device.classic_enabled = True
+
+        # Setup the SDP to expose the sink service
+        device.sdp_service_records = sdp_records()
+
+        # Start the controller
+        await device.power_on()
+
+        # Create a listener to wait for AVDTP connections
+        listener = avdtp.Listener(avdtp.Listener.create_registrar(device))
+        listener.on('connection', on_avdtp_connection)
+
+        avrcp_delegate = Delegate()
+        avrcp_protocol = avrcp.Protocol(avrcp_delegate)
+        avrcp_protocol.listen(device)
+
+        websocket_server = WebSocketServer(avrcp_protocol, avrcp_delegate)
+        avrcp_delegate.websocket_server = websocket_server
+        avrcp_protocol.on(
+            "start", lambda: on_avrcp_start(avrcp_protocol, websocket_server)
+        )
+        await websocket_server.start()
+
+        if len(sys.argv) >= 5:
+            # Connect to the peer
+            target_address = sys.argv[4]
+            print(f'=== Connecting to {target_address}...')
+            connection = await device.connect(
+                target_address, transport=BT_BR_EDR_TRANSPORT
+            )
+            print(f'=== Connected to {connection.peer_address}!')
+
+            # Request authentication
+            print('*** Authenticating...')
+            await connection.authenticate()
+            print('*** Authenticated')
+
+            # Enable encryption
+            print('*** Enabling encryption...')
+            await connection.encrypt()
+            print('*** Encryption on')
+
+            server = await avdtp.Protocol.connect(connection)
+            listener.set_server(connection, server)
+            sink = server.add_sink(codec_capabilities())
+            sink.on('rtp_packet', on_rtp_packet)
+
+            await avrcp_protocol.connect(connection)
+
+        else:
+            # Start being discoverable and connectable
+            await device.set_discoverable(True)
+            await device.set_connectable(True)
+
+        await asyncio.get_event_loop().create_future()
+
+
+# -----------------------------------------------------------------------------
+logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'DEBUG').upper())
+asyncio.run(main())

examples/run_cig_setup.py

@@ -22,10 +22,11 @@ import os
 from bumble.device import (
     Device,
     Connection,
+    AdvertisingParameters,
+    AdvertisingEventProperties,
 )
 from bumble.hci import (
     OwnAddressType,
-    HCI_LE_Set_Extended_Advertising_Parameters_Command,
 )
 
 from bumble.transport import open_transport_or_link
@@ -61,12 +62,7 @@ async def main() -> None:
     devices[1].cis_enabled = True
 
     await asyncio.gather(*[device.power_on() for device in devices])
-    await devices[0].start_extended_advertising(
+    advertising_set = await devices[0].create_advertising_set()
-        advertising_properties=(
-            HCI_LE_Set_Extended_Advertising_Parameters_Command.AdvertisingProperties.CONNECTABLE_ADVERTISING
-        ),
-        own_address_type=OwnAddressType.PUBLIC,
-    )
 
     connection = await devices[1].connect(
         devices[0].public_address, own_address_type=OwnAddressType.PUBLIC

examples/run_csis_servers.py

@@ -0,0 +1,110 @@
+# Copyright 2021-2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import asyncio
+import logging
+import sys
+import os
+import secrets
+
+from bumble.core import AdvertisingData
+from bumble.device import Device
+from bumble.hci import (
+    Address,
+    OwnAddressType,
+    HCI_LE_Set_Extended_Advertising_Parameters_Command,
+)
+from bumble.profiles.cap import CommonAudioServiceService
+from bumble.profiles.csip import CoordinatedSetIdentificationService, SirkType
+
+from bumble.transport import open_transport_or_link
+
+
+# -----------------------------------------------------------------------------
+async def main() -> None:
+    if len(sys.argv) < 3:
+        print(
+            'Usage: run_cig_setup.py <config-file>'
+            '<transport-spec-for-device-1> <transport-spec-for-device-2>'
+        )
+        print(
+            'example: run_cig_setup.py device1.json'
+            'tcp-client:127.0.0.1:6402 tcp-client:127.0.0.1:6402'
+        )
+        return
+
+    print('<<< connecting to HCI...')
+    hci_transports = await asyncio.gather(
+        open_transport_or_link(sys.argv[2]), open_transport_or_link(sys.argv[3])
+    )
+    print('<<< connected')
+
+    devices = [
+        Device.from_config_file_with_hci(
+            sys.argv[1], hci_transport.source, hci_transport.sink
+        )
+        for hci_transport in hci_transports
+    ]
+
+    sirk = secrets.token_bytes(16)
+
+    for i, device in enumerate(devices):
+        device.random_address = Address(secrets.token_bytes(6))
+        await device.power_on()
+        csis = CoordinatedSetIdentificationService(
+            set_identity_resolving_key=sirk,
+            set_identity_resolving_key_type=SirkType.PLAINTEXT,
+            coordinated_set_size=2,
+        )
+        device.add_service(CommonAudioServiceService(csis))
+        advertising_data = (
+            bytes(
+                AdvertisingData(
+                    [
+                        (
+                            AdvertisingData.COMPLETE_LOCAL_NAME,
+                            bytes(f'Bumble LE Audio-{i}', 'utf-8'),
+                        ),
+                        (
+                            AdvertisingData.FLAGS,
+                            bytes(
+                                [
+                                    AdvertisingData.LE_GENERAL_DISCOVERABLE_MODE_FLAG
+                                    | AdvertisingData.BR_EDR_HOST_FLAG
+                                    | AdvertisingData.BR_EDR_CONTROLLER_FLAG
+                                ]
+                            ),
+                        ),
+                        (
+                            AdvertisingData.INCOMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS,
+                            bytes(CoordinatedSetIdentificationService.UUID),
+                        ),
+                    ]
+                )
+            )
+            + csis.get_advertising_data()
+        )
+        await device.create_advertising_set(advertising_data=advertising_data)
+
+    await asyncio.gather(
+        *[hci_transport.source.terminated for hci_transport in hci_transports]
+    )
+
+
+# -----------------------------------------------------------------------------
+logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'DEBUG').upper())
+asyncio.run(main())

examples/run_esco_connection.py

@@ -73,7 +73,6 @@ async def main() -> None:
         HCI_Enhanced_Setup_Synchronous_Connection_Command(
             connection_handle=connections[0].handle,
             **ESCO_PARAMETERS[DefaultCodecParameters.ESCO_CVSD_S3].asdict(),
-            # type: ignore[call-args]
         )
     )
 

examples/run_extended_advertiser.py

@@ -19,8 +19,13 @@ import asyncio
 import logging
 import sys
 import os
-from bumble.device import AdvertisingType, Device
+from bumble.device import (
-from bumble.hci import Address, HCI_LE_Set_Extended_Advertising_Parameters_Command
+    AdvertisingParameters,
+    AdvertisingEventProperties,
+    AdvertisingType,
+    Device,
+)
+from bumble.hci import Address
 
 from bumble.transport import open_transport_or_link
 
@@ -35,20 +40,16 @@ async def main() -> None:
         return
 
     if len(sys.argv) >= 4:
-        advertising_properties = (
+        advertising_properties = AdvertisingEventProperties.from_advertising_type(
-            HCI_LE_Set_Extended_Advertising_Parameters_Command.AdvertisingProperties(
+            AdvertisingType(int(sys.argv[3]))
-                int(sys.argv[3])
-            )
         )
     else:
-        advertising_properties = (
+        advertising_properties = AdvertisingEventProperties()
-            HCI_LE_Set_Extended_Advertising_Parameters_Command.AdvertisingProperties.CONNECTABLE_ADVERTISING
-        )
 
     if len(sys.argv) >= 5:
-        target = Address(sys.argv[4])
+        peer_address = Address(sys.argv[4])
     else:
-        target = Address.ANY
+        peer_address = Address.ANY
 
     print('<<< connecting to HCI...')
     async with await open_transport_or_link(sys.argv[2]) as hci_transport:
@@ -58,8 +59,11 @@ async def main() -> None:
             sys.argv[1], hci_transport.source, hci_transport.sink
         )
         await device.power_on()
-        await device.start_extended_advertising(
+        await device.create_advertising_set(
-            advertising_properties=advertising_properties, target=target
+            advertising_parameters=AdvertisingParameters(
+                advertising_event_properties=advertising_properties,
+                peer_address=peer_address,
+            )
         )
         await hci_transport.source.terminated
 

examples/run_extended_advertiser_2.py

@@ -0,0 +1,99 @@
+# Copyright 2021-2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import asyncio
+import logging
+import sys
+import os
+from bumble.device import AdvertisingParameters, AdvertisingEventProperties, Device
+from bumble.hci import Address
+from bumble.core import AdvertisingData
+from bumble.transport import open_transport_or_link
+
+
+# -----------------------------------------------------------------------------
+async def main() -> None:
+    if len(sys.argv) < 3:
+        print('Usage: run_extended_advertiser_2.py <config-file> <transport-spec>')
+        print('example: run_extended_advertiser_2.py device1.json usb:0')
+        return
+
+    print('<<< connecting to HCI...')
+    async with await open_transport_or_link(sys.argv[2]) as hci_transport:
+        print('<<< connected')
+
+        device = Device.from_config_file_with_hci(
+            sys.argv[1], hci_transport.source, hci_transport.sink
+        )
+        await device.power_on()
+
+        if not device.supports_le_extended_advertising:
+            print("Device does not support extended advertising")
+            return
+
+        print("Max advertising sets:", device.host.number_of_supported_advertising_sets)
+        print(
+            "Max advertising data length:", device.host.maximum_advertising_data_length
+        )
+
+        if device.host.number_of_supported_advertising_sets >= 1:
+            advertising_data1 = AdvertisingData(
+                [(AdvertisingData.COMPLETE_LOCAL_NAME, "Bumble 1".encode("utf-8"))]
+            )
+
+            set1 = await device.create_advertising_set(
+                advertising_data=bytes(advertising_data1),
+            )
+            print("Selected TX power 1:", set1.selected_tx_power)
+
+            advertising_data2 = AdvertisingData(
+                [(AdvertisingData.COMPLETE_LOCAL_NAME, "Bumble 2".encode("utf-8"))]
+            )
+
+        if device.host.number_of_supported_advertising_sets >= 2:
+            set2 = await device.create_advertising_set(
+                random_address=Address("F0:F0:F0:F0:F0:F1"),
+                advertising_parameters=AdvertisingParameters(),
+                advertising_data=bytes(advertising_data2),
+                auto_start=False,
+                auto_restart=True,
+            )
+            print("Selected TX power 2:", set2.selected_tx_power)
+            await set2.start()
+
+        if device.host.number_of_supported_advertising_sets >= 3:
+            scan_response_data3 = AdvertisingData(
+                [(AdvertisingData.COMPLETE_LOCAL_NAME, "Bumble 3".encode("utf-8"))]
+            )
+
+            set3 = await device.create_advertising_set(
+                random_address=Address("F0:F0:F0:F0:F0:F2"),
+                advertising_parameters=AdvertisingParameters(
+                    advertising_event_properties=AdvertisingEventProperties(
+                        is_connectable=False, is_scannable=True
+                    )
+                ),
+                scan_response_data=bytes(scan_response_data3),
+            )
+            print("Selected TX power 3:", set2.selected_tx_power)
+
+        await hci_transport.source.terminated
+
+
+# -----------------------------------------------------------------------------
+logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'DEBUG').upper())
+asyncio.run(main())

examples/run_hfp_handsfree.py

@@ -21,11 +21,13 @@ import os
 import logging
 import json
 import websockets
+import functools
 from typing import Optional
 
-from bumble.device import Device
+from bumble import rfcomm
+from bumble import hci
+from bumble.device import Device, Connection
 from bumble.transport import open_transport_or_link
-from bumble.rfcomm import Server as RfcommServer
 from bumble import hfp
 from bumble.hfp import HfProtocol
 
@@ -57,12 +59,44 @@ class UiServer:
 
 
 # -----------------------------------------------------------------------------
-def on_dlc(dlc, configuration: hfp.Configuration):
+def on_dlc(dlc: rfcomm.DLC, configuration: hfp.Configuration):
     print('*** DLC connected', dlc)
     protocol = HfProtocol(dlc, configuration)
     UiServer.protocol = protocol
     asyncio.create_task(protocol.run())
 
+    def on_sco_request(connection: Connection, link_type: int, protocol: HfProtocol):
+        if connection == protocol.dlc.multiplexer.l2cap_channel.connection:
+            if link_type == hci.HCI_Connection_Complete_Event.SCO_LINK_TYPE:
+                esco_parameters = hfp.ESCO_PARAMETERS[
+                    hfp.DefaultCodecParameters.SCO_CVSD_D1
+                ]
+            elif protocol.active_codec == hfp.AudioCodec.MSBC:
+                esco_parameters = hfp.ESCO_PARAMETERS[
+                    hfp.DefaultCodecParameters.ESCO_MSBC_T2
+                ]
+            elif protocol.active_codec == hfp.AudioCodec.CVSD:
+                esco_parameters = hfp.ESCO_PARAMETERS[
+                    hfp.DefaultCodecParameters.ESCO_CVSD_S4
+                ]
+            connection.abort_on(
+                'disconnection',
+                connection.device.send_command(
+                    hci.HCI_Enhanced_Accept_Synchronous_Connection_Request_Command(
+                        bd_addr=connection.peer_address, **esco_parameters.asdict()
+                    )
+                ),
+            )
+
+    handler = functools.partial(on_sco_request, protocol=protocol)
+    dlc.multiplexer.l2cap_channel.connection.device.on('sco_request', handler)
+    dlc.multiplexer.l2cap_channel.once(
+        'close',
+        lambda: dlc.multiplexer.l2cap_channel.connection.device.remove_listener(
+            'sco_request', handler
+        ),
+    )
+
 
 # -----------------------------------------------------------------------------
 async def main():
@@ -101,7 +135,7 @@ async def main():
         device.classic_enabled = True
 
         # Create and register a server
-        rfcomm_server = RfcommServer(device)
+        rfcomm_server = rfcomm.Server(device)
 
         # Listen for incoming DLC connections
         channel_number = rfcomm_server.listen(lambda dlc: on_dlc(dlc, configuration))

examples/run_hid_device.py

@@ -0,0 +1,748 @@
+# Copyright 2021-2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import asyncio
+import sys
+import os
+import logging
+import json
+import websockets
+from bumble.colors import color
+
+from bumble.device import Device
+from bumble.transport import open_transport_or_link
+from bumble.core import (
+    BT_BR_EDR_TRANSPORT,
+    BT_L2CAP_PROTOCOL_ID,
+    BT_HUMAN_INTERFACE_DEVICE_SERVICE,
+    BT_HIDP_PROTOCOL_ID,
+    UUID,
+)
+from bumble.hci import Address
+from bumble.hid import (
+    Device as HID_Device,
+    HID_CONTROL_PSM,
+    HID_INTERRUPT_PSM,
+    Message,
+)
+from bumble.sdp import (
+    Client as SDP_Client,
+    DataElement,
+    ServiceAttribute,
+    SDP_PUBLIC_BROWSE_ROOT,
+    SDP_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+    SDP_SERVICE_CLASS_ID_LIST_ATTRIBUTE_ID,
+    SDP_BLUETOOTH_PROFILE_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+    SDP_ALL_ATTRIBUTES_RANGE,
+    SDP_LANGUAGE_BASE_ATTRIBUTE_ID_LIST_ATTRIBUTE_ID,
+    SDP_ADDITIONAL_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+    SDP_SERVICE_RECORD_HANDLE_ATTRIBUTE_ID,
+    SDP_BROWSE_GROUP_LIST_ATTRIBUTE_ID,
+)
+from bumble.utils import AsyncRunner
+
+# -----------------------------------------------------------------------------
+# SDP attributes for Bluetooth HID devices
+SDP_HID_SERVICE_NAME_ATTRIBUTE_ID = 0x0100
+SDP_HID_SERVICE_DESCRIPTION_ATTRIBUTE_ID = 0x0101
+SDP_HID_PROVIDER_NAME_ATTRIBUTE_ID = 0x0102
+SDP_HID_DEVICE_RELEASE_NUMBER_ATTRIBUTE_ID = 0x0200  # [DEPRECATED]
+SDP_HID_PARSER_VERSION_ATTRIBUTE_ID = 0x0201
+SDP_HID_DEVICE_SUBCLASS_ATTRIBUTE_ID = 0x0202
+SDP_HID_COUNTRY_CODE_ATTRIBUTE_ID = 0x0203
+SDP_HID_VIRTUAL_CABLE_ATTRIBUTE_ID = 0x0204
+SDP_HID_RECONNECT_INITIATE_ATTRIBUTE_ID = 0x0205
+SDP_HID_DESCRIPTOR_LIST_ATTRIBUTE_ID = 0x0206
+SDP_HID_LANGID_BASE_LIST_ATTRIBUTE_ID = 0x0207
+SDP_HID_SDP_DISABLE_ATTRIBUTE_ID = 0x0208  # [DEPRECATED]
+SDP_HID_BATTERY_POWER_ATTRIBUTE_ID = 0x0209
+SDP_HID_REMOTE_WAKE_ATTRIBUTE_ID = 0x020A
+SDP_HID_PROFILE_VERSION_ATTRIBUTE_ID = 0x020B  # DEPRECATED]
+SDP_HID_SUPERVISION_TIMEOUT_ATTRIBUTE_ID = 0x020C
+SDP_HID_NORMALLY_CONNECTABLE_ATTRIBUTE_ID = 0x020D
+SDP_HID_BOOT_DEVICE_ATTRIBUTE_ID = 0x020E
+SDP_HID_SSR_HOST_MAX_LATENCY_ATTRIBUTE_ID = 0x020F
+SDP_HID_SSR_HOST_MIN_TIMEOUT_ATTRIBUTE_ID = 0x0210
+
+# Refer to HID profile specification v1.1.1, "5.3 Service Discovery Protocol (SDP)" for details
+# HID SDP attribute values
+LANGUAGE = 0x656E  # 0x656E uint16 “en” (English)
+ENCODING = 0x6A  # 0x006A uint16 UTF-8 encoding
+PRIMARY_LANGUAGE_BASE_ID = 0x100  # 0x0100 uint16 PrimaryLanguageBaseID
+VERSION_NUMBER = 0x0101  # 0x0101 uint16 version number (v1.1)
+SERVICE_NAME = b'Bumble HID'
+SERVICE_DESCRIPTION = b'Bumble'
+PROVIDER_NAME = b'Bumble'
+HID_PARSER_VERSION = 0x0111  # uint16 0x0111 (v1.1.1)
+HID_DEVICE_SUBCLASS = 0xC0  # Combo keyboard/pointing device
+HID_COUNTRY_CODE = 0x21  # 0x21 Uint8, USA
+HID_VIRTUAL_CABLE = True  # Virtual cable enabled
+HID_RECONNECT_INITIATE = True  #  Reconnect initiate enabled
+REPORT_DESCRIPTOR_TYPE = 0x22  # 0x22 Type = Report Descriptor
+HID_LANGID_BASE_LANGUAGE = 0x0409  # 0x0409 Language = English (United States)
+HID_LANGID_BASE_BLUETOOTH_STRING_OFFSET = 0x100  # 0x0100 Default
+HID_BATTERY_POWER = True  #  Battery power enabled
+HID_REMOTE_WAKE = True  #  Remote wake enabled
+HID_SUPERVISION_TIMEOUT = 0xC80  # uint16 0xC80 (2s)
+HID_NORMALLY_CONNECTABLE = True  #  Normally connectable enabled
+HID_BOOT_DEVICE = True  #  Boot device support enabled
+HID_SSR_HOST_MAX_LATENCY = 0x640  # uint16 0x640 (1s)
+HID_SSR_HOST_MIN_TIMEOUT = 0xC80  # uint16 0xC80 (2s)
+HID_REPORT_MAP = bytes(  # Text String, 50 Octet Report Descriptor
+    # pylint: disable=line-too-long
+    [
+        0x05,
+        0x01,  # Usage Page (Generic Desktop Ctrls)
+        0x09,
+        0x06,  # Usage (Keyboard)
+        0xA1,
+        0x01,  # Collection (Application)
+        0x85,
+        0x01,  # . Report ID (1)
+        0x05,
+        0x07,  # . Usage Page (Kbrd/Keypad)
+        0x19,
+        0xE0,  # . Usage Minimum (0xE0)
+        0x29,
+        0xE7,  # . Usage Maximum (0xE7)
+        0x15,
+        0x00,  # . Logical Minimum (0)
+        0x25,
+        0x01,  # . Logical Maximum (1)
+        0x75,
+        0x01,  # . Report Size (1)
+        0x95,
+        0x08,  # . Report Count (8)
+        0x81,
+        0x02,  # . Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
+        0x95,
+        0x01,  # . Report Count (1)
+        0x75,
+        0x08,  # . Report Size (8)
+        0x81,
+        0x03,  # . Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
+        0x95,
+        0x05,  # . Report Count (5)
+        0x75,
+        0x01,  # . Report Size (1)
+        0x05,
+        0x08,  # . Usage Page (LEDs)
+        0x19,
+        0x01,  # . Usage Minimum (Num Lock)
+        0x29,
+        0x05,  # . Usage Maximum (Kana)
+        0x91,
+        0x02,  # . Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
+        0x95,
+        0x01,  # . Report Count (1)
+        0x75,
+        0x03,  # . Report Size (3)
+        0x91,
+        0x03,  # . Output (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
+        0x95,
+        0x06,  # . Report Count (6)
+        0x75,
+        0x08,  # . Report Size (8)
+        0x15,
+        0x00,  # . Logical Minimum (0)
+        0x25,
+        0x65,  # . Logical Maximum (101)
+        0x05,
+        0x07,  # . Usage Page (Kbrd/Keypad)
+        0x19,
+        0x00,  # . Usage Minimum (0x00)
+        0x29,
+        0x65,  # . Usage Maximum (0x65)
+        0x81,
+        0x00,  # . Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
+        0xC0,  # End Collection
+        0x05,
+        0x01,  # Usage Page (Generic Desktop Ctrls)
+        0x09,
+        0x02,  # Usage (Mouse)
+        0xA1,
+        0x01,  # Collection (Application)
+        0x85,
+        0x02,  # . Report ID (2)
+        0x09,
+        0x01,  # . Usage (Pointer)
+        0xA1,
+        0x00,  # . Collection (Physical)
+        0x05,
+        0x09,  # .   Usage Page (Button)
+        0x19,
+        0x01,  # .   Usage Minimum (0x01)
+        0x29,
+        0x03,  # .   Usage Maximum (0x03)
+        0x15,
+        0x00,  # .   Logical Minimum (0)
+        0x25,
+        0x01,  # .   Logical Maximum (1)
+        0x95,
+        0x03,  # .   Report Count (3)
+        0x75,
+        0x01,  # .   Report Size (1)
+        0x81,
+        0x02,  # .   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
+        0x95,
+        0x01,  # .   Report Count (1)
+        0x75,
+        0x05,  # .   Report Size (5)
+        0x81,
+        0x03,  # .   Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
+        0x05,
+        0x01,  # .   Usage Page (Generic Desktop Ctrls)
+        0x09,
+        0x30,  # .   Usage (X)
+        0x09,
+        0x31,  # .   Usage (Y)
+        0x15,
+        0x81,  # .   Logical Minimum (-127)
+        0x25,
+        0x7F,  # .   Logical Maximum (127)
+        0x75,
+        0x08,  # .   Report Size (8)
+        0x95,
+        0x02,  # .   Report Count (2)
+        0x81,
+        0x06,  # .   Input (Data,Var,Rel,No Wrap,Linear,Preferred State,No Null Position)
+        0xC0,  # . End Collection
+        0xC0,  # End Collection
+    ]
+)
+
+
+# Default protocol mode set to report protocol
+protocol_mode = Message.ProtocolMode.REPORT_PROTOCOL
+
+# -----------------------------------------------------------------------------
+def sdp_records():
+    service_record_handle = 0x00010002
+    return {
+        service_record_handle: [
+            ServiceAttribute(
+                SDP_SERVICE_RECORD_HANDLE_ATTRIBUTE_ID,
+                DataElement.unsigned_integer_32(service_record_handle),
+            ),
+            ServiceAttribute(
+                SDP_BROWSE_GROUP_LIST_ATTRIBUTE_ID,
+                DataElement.sequence([DataElement.uuid(SDP_PUBLIC_BROWSE_ROOT)]),
+            ),
+            ServiceAttribute(
+                SDP_SERVICE_CLASS_ID_LIST_ATTRIBUTE_ID,
+                DataElement.sequence(
+                    [DataElement.uuid(BT_HUMAN_INTERFACE_DEVICE_SERVICE)]
+                ),
+            ),
+            ServiceAttribute(
+                SDP_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+                DataElement.sequence(
+                    [
+                        DataElement.sequence(
+                            [
+                                DataElement.uuid(BT_L2CAP_PROTOCOL_ID),
+                                DataElement.unsigned_integer_16(HID_CONTROL_PSM),
+                            ]
+                        ),
+                        DataElement.sequence(
+                            [
+                                DataElement.uuid(BT_HIDP_PROTOCOL_ID),
+                            ]
+                        ),
+                    ]
+                ),
+            ),
+            ServiceAttribute(
+                SDP_LANGUAGE_BASE_ATTRIBUTE_ID_LIST_ATTRIBUTE_ID,
+                DataElement.sequence(
+                    [
+                        DataElement.unsigned_integer_16(LANGUAGE),
+                        DataElement.unsigned_integer_16(ENCODING),
+                        DataElement.unsigned_integer_16(PRIMARY_LANGUAGE_BASE_ID),
+                    ]
+                ),
+            ),
+            ServiceAttribute(
+                SDP_BLUETOOTH_PROFILE_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+                DataElement.sequence(
+                    [
+                        DataElement.sequence(
+                            [
+                                DataElement.uuid(BT_HUMAN_INTERFACE_DEVICE_SERVICE),
+                                DataElement.unsigned_integer_16(VERSION_NUMBER),
+                            ]
+                        ),
+                    ]
+                ),
+            ),
+            ServiceAttribute(
+                SDP_ADDITIONAL_PROTOCOL_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+                DataElement.sequence(
+                    [
+                        DataElement.sequence(
+                            [
+                                DataElement.sequence(
+                                    [
+                                        DataElement.uuid(BT_L2CAP_PROTOCOL_ID),
+                                        DataElement.unsigned_integer_16(
+                                            HID_INTERRUPT_PSM
+                                        ),
+                                    ]
+                                ),
+                                DataElement.sequence(
+                                    [
+                                        DataElement.uuid(BT_HIDP_PROTOCOL_ID),
+                                    ]
+                                ),
+                            ]
+                        ),
+                    ]
+                ),
+            ),
+            ServiceAttribute(
+                SDP_HID_SERVICE_NAME_ATTRIBUTE_ID,
+                DataElement(DataElement.TEXT_STRING, SERVICE_NAME),
+            ),
+            ServiceAttribute(
+                SDP_HID_SERVICE_DESCRIPTION_ATTRIBUTE_ID,
+                DataElement(DataElement.TEXT_STRING, SERVICE_DESCRIPTION),
+            ),
+            ServiceAttribute(
+                SDP_HID_PROVIDER_NAME_ATTRIBUTE_ID,
+                DataElement(DataElement.TEXT_STRING, PROVIDER_NAME),
+            ),
+            ServiceAttribute(
+                SDP_HID_PARSER_VERSION_ATTRIBUTE_ID,
+                DataElement.unsigned_integer_32(HID_PARSER_VERSION),
+            ),
+            ServiceAttribute(
+                SDP_HID_DEVICE_SUBCLASS_ATTRIBUTE_ID,
+                DataElement.unsigned_integer_32(HID_DEVICE_SUBCLASS),
+            ),
+            ServiceAttribute(
+                SDP_HID_COUNTRY_CODE_ATTRIBUTE_ID,
+                DataElement.unsigned_integer_32(HID_COUNTRY_CODE),
+            ),
+            ServiceAttribute(
+                SDP_HID_VIRTUAL_CABLE_ATTRIBUTE_ID,
+                DataElement.boolean(HID_VIRTUAL_CABLE),
+            ),
+            ServiceAttribute(
+                SDP_HID_RECONNECT_INITIATE_ATTRIBUTE_ID,
+                DataElement.boolean(HID_RECONNECT_INITIATE),
+            ),
+            ServiceAttribute(
+                SDP_HID_DESCRIPTOR_LIST_ATTRIBUTE_ID,
+                DataElement.sequence(
+                    [
+                        DataElement.sequence(
+                            [
+                                DataElement.unsigned_integer_16(REPORT_DESCRIPTOR_TYPE),
+                                DataElement(DataElement.TEXT_STRING, HID_REPORT_MAP),
+                            ]
+                        ),
+                    ]
+                ),
+            ),
+            ServiceAttribute(
+                SDP_HID_LANGID_BASE_LIST_ATTRIBUTE_ID,
+                DataElement.sequence(
+                    [
+                        DataElement.sequence(
+                            [
+                                DataElement.unsigned_integer_16(
+                                    HID_LANGID_BASE_LANGUAGE
+                                ),
+                                DataElement.unsigned_integer_16(
+                                    HID_LANGID_BASE_BLUETOOTH_STRING_OFFSET
+                                ),
+                            ]
+                        ),
+                    ]
+                ),
+            ),
+            ServiceAttribute(
+                SDP_HID_BATTERY_POWER_ATTRIBUTE_ID,
+                DataElement.boolean(HID_BATTERY_POWER),
+            ),
+            ServiceAttribute(
+                SDP_HID_REMOTE_WAKE_ATTRIBUTE_ID,
+                DataElement.boolean(HID_REMOTE_WAKE),
+            ),
+            ServiceAttribute(
+                SDP_HID_SUPERVISION_TIMEOUT_ATTRIBUTE_ID,
+                DataElement.unsigned_integer_16(HID_SUPERVISION_TIMEOUT),
+            ),
+            ServiceAttribute(
+                SDP_HID_NORMALLY_CONNECTABLE_ATTRIBUTE_ID,
+                DataElement.boolean(HID_NORMALLY_CONNECTABLE),
+            ),
+            ServiceAttribute(
+                SDP_HID_BOOT_DEVICE_ATTRIBUTE_ID,
+                DataElement.boolean(HID_BOOT_DEVICE),
+            ),
+            ServiceAttribute(
+                SDP_HID_SSR_HOST_MAX_LATENCY_ATTRIBUTE_ID,
+                DataElement.unsigned_integer_16(HID_SSR_HOST_MAX_LATENCY),
+            ),
+            ServiceAttribute(
+                SDP_HID_SSR_HOST_MIN_TIMEOUT_ATTRIBUTE_ID,
+                DataElement.unsigned_integer_16(HID_SSR_HOST_MIN_TIMEOUT),
+            ),
+        ]
+    }
+
+
+# -----------------------------------------------------------------------------
+async def get_stream_reader(pipe) -> asyncio.StreamReader:
+    loop = asyncio.get_event_loop()
+    reader = asyncio.StreamReader(loop=loop)
+    protocol = asyncio.StreamReaderProtocol(reader)
+    await loop.connect_read_pipe(lambda: protocol, pipe)
+    return reader
+
+
+class DeviceData:
+    def __init__(self) -> None:
+        self.keyboardData = bytearray(
+            [0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
+        )
+        self.mouseData = bytearray([0x02, 0x00, 0x00, 0x00])
+
+
+# Device's live data - Mouse and Keyboard will be stored in this
+deviceData = DeviceData()
+
+# -----------------------------------------------------------------------------
+async def keyboard_device(hid_device):
+
+    # Start a Websocket server to receive events from a web page
+    async def serve(websocket, _path):
+        global deviceData
+        while True:
+            try:
+                message = await websocket.recv()
+                print('Received: ', str(message))
+                parsed = json.loads(message)
+                message_type = parsed['type']
+                if message_type == 'keydown':
+                    # Only deal with keys a to z for now
+                    key = parsed['key']
+                    if len(key) == 1:
+                        code = ord(key)
+                        if ord('a') <= code <= ord('z'):
+                            hid_code = 0x04 + code - ord('a')
+                            deviceData.keyboardData = bytearray(
+                                [
+                                    0x01,
+                                    0x00,
+                                    0x00,
+                                    hid_code,
+                                    0x00,
+                                    0x00,
+                                    0x00,
+                                    0x00,
+                                    0x00,
+                                ]
+                            )
+                            hid_device.send_data(deviceData.keyboardData)
+                elif message_type == 'keyup':
+                    deviceData.keyboardData = bytearray(
+                        [0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
+                    )
+                    hid_device.send_data(deviceData.keyboardData)
+                elif message_type == "mousemove":
+                    # logical min and max values
+                    log_min = -127
+                    log_max = 127
+                    x = parsed['x']
+                    y = parsed['y']
+                    # limiting x and y values within logical max and min range
+                    x = max(log_min, min(log_max, x))
+                    y = max(log_min, min(log_max, y))
+                    x_cord = x.to_bytes(signed=True)
+                    y_cord = y.to_bytes(signed=True)
+                    deviceData.mouseData = bytearray([0x02, 0x00]) + x_cord + y_cord
+                    hid_device.send_data(deviceData.mouseData)
+            except websockets.exceptions.ConnectionClosedOK:
+                pass
+
+    # pylint: disable-next=no-member
+    await websockets.serve(serve, 'localhost', 8989)
+    await asyncio.get_event_loop().create_future()
+
+
+# -----------------------------------------------------------------------------
+async def main():
+    if len(sys.argv) < 3:
+        print(
+            'Usage: python run_hid_device.py <device-config> <transport-spec> <command>'
+            '  where <command> is one of:\n'
+            '  test-mode (run with menu enabled for testing)\n'
+            '  web (run a keyboard with keypress input from a web page, '
+            'see keyboard.html'
+        )
+        print('example: python run_hid_device.py hid_keyboard.json usb:0 web')
+        print('example: python run_hid_device.py hid_keyboard.json usb:0 test-mode')
+
+        return
+
+    async def handle_virtual_cable_unplug():
+        hid_host_bd_addr = str(hid_device.remote_device_bd_address)
+        await hid_device.disconnect_interrupt_channel()
+        await hid_device.disconnect_control_channel()
+        await device.keystore.delete(hid_host_bd_addr)  # type: ignore
+        connection = hid_device.connection
+        if connection is not None:
+            await connection.disconnect()
+
+    def on_hid_data_cb(pdu: bytes):
+        print(f'Received Data, PDU: {pdu.hex()}')
+
+    def on_get_report_cb(report_id: int, report_type: int, buffer_size: int):
+        retValue = hid_device.GetSetStatus()
+        print(
+            "GET_REPORT report_id: "
+            + str(report_id)
+            + "report_type: "
+            + str(report_type)
+            + "buffer_size:"
+            + str(buffer_size)
+        )
+        if report_type == Message.ReportType.INPUT_REPORT:
+            if report_id == 1:
+                retValue.data = deviceData.keyboardData[1:]
+                retValue.status = hid_device.GetSetReturn.SUCCESS
+            elif report_id == 2:
+                retValue.data = deviceData.mouseData[1:]
+                retValue.status = hid_device.GetSetReturn.SUCCESS
+            else:
+                retValue.status = hid_device.GetSetReturn.REPORT_ID_NOT_FOUND
+
+            if buffer_size:
+                data_len = buffer_size - 1
+                retValue.data = retValue.data[:data_len]
+        elif report_type == Message.ReportType.OUTPUT_REPORT:
+            # This sample app has nothing to do with the report received, to enable PTS
+            # testing, we will return single byte random data.
+            retValue.data = bytearray([0x11])
+            retValue.status = hid_device.GetSetReturn.SUCCESS
+        elif report_type == Message.ReportType.FEATURE_REPORT:
+            retValue.status = hid_device.GetSetReturn.ERR_INVALID_PARAMETER
+        elif report_type == Message.ReportType.OTHER_REPORT:
+            if report_id == 3:
+                retValue.status = hid_device.GetSetReturn.REPORT_ID_NOT_FOUND
+        else:
+            retValue.status = hid_device.GetSetReturn.FAILURE
+
+        return retValue
+
+    def on_set_report_cb(
+        report_id: int, report_type: int, report_size: int, data: bytes
+    ):
+        retValue = hid_device.GetSetStatus()
+        print(
+            "SET_REPORT report_id: "
+            + str(report_id)
+            + "report_type: "
+            + str(report_type)
+            + "report_size "
+            + str(report_size)
+            + "data:"
+            + str(data)
+        )
+        if report_type == Message.ReportType.FEATURE_REPORT:
+            retValue.status = hid_device.GetSetReturn.ERR_INVALID_PARAMETER
+        elif report_type == Message.ReportType.INPUT_REPORT:
+            if report_id == 1 and report_size != len(deviceData.keyboardData):
+                retValue.status = hid_device.GetSetReturn.ERR_INVALID_PARAMETER
+            elif report_id == 2 and report_size != len(deviceData.mouseData):
+                retValue.status = hid_device.GetSetReturn.ERR_INVALID_PARAMETER
+            elif report_id == 3:
+                retValue.status = hid_device.GetSetReturn.REPORT_ID_NOT_FOUND
+            else:
+                retValue.status = hid_device.GetSetReturn.SUCCESS
+        else:
+            retValue.status = hid_device.GetSetReturn.SUCCESS
+
+        return retValue
+
+    def on_get_protocol_cb():
+        retValue = hid_device.GetSetStatus()
+        retValue.data = protocol_mode.to_bytes()
+        retValue.status = hid_device.GetSetReturn.SUCCESS
+        return retValue
+
+    def on_set_protocol_cb(protocol: int):
+        retValue = hid_device.GetSetStatus()
+        # We do not support SET_PROTOCOL.
+        print(f"SET_PROTOCOL report_id: {protocol}")
+        retValue.status = hid_device.GetSetReturn.ERR_UNSUPPORTED_REQUEST
+        return retValue
+
+    def on_virtual_cable_unplug_cb():
+        print('Received Virtual Cable Unplug')
+        asyncio.create_task(handle_virtual_cable_unplug())
+
+    print('<<< connecting to HCI...')
+    async with await open_transport_or_link(sys.argv[2]) as (hci_source, hci_sink):
+        print('<<< connected')
+
+        # Create a device
+        device = Device.from_config_file_with_hci(sys.argv[1], hci_source, hci_sink)
+        device.classic_enabled = True
+
+        # Create and register HID device
+        hid_device = HID_Device(device)
+
+        # Register for  call backs
+        hid_device.on('interrupt_data', on_hid_data_cb)
+
+        hid_device.register_get_report_cb(on_get_report_cb)
+        hid_device.register_set_report_cb(on_set_report_cb)
+        hid_device.register_get_protocol_cb(on_get_protocol_cb)
+        hid_device.register_set_protocol_cb(on_set_protocol_cb)
+
+        # Register for virtual cable unplug call back
+        hid_device.on('virtual_cable_unplug', on_virtual_cable_unplug_cb)
+
+        # Setup the SDP to advertise HID Device service
+        device.sdp_service_records = sdp_records()
+
+        # Start the controller
+        await device.power_on()
+
+        # Start being discoverable and connectable
+        await device.set_discoverable(True)
+        await device.set_connectable(True)
+
+        async def menu():
+            reader = await get_stream_reader(sys.stdin)
+            while True:
+                print(
+                    "\n************************ HID Device Menu *****************************\n"
+                )
+                print(" 1. Connect Control Channel")
+                print(" 2. Connect Interrupt Channel")
+                print(" 3. Disconnect Control Channel")
+                print(" 4. Disconnect Interrupt Channel")
+                print(" 5. Send Report on Interrupt Channel")
+                print(" 6. Virtual Cable Unplug")
+                print(" 7. Disconnect device")
+                print(" 8. Delete Bonding")
+                print(" 9. Re-connect to device")
+                print("10. Exit ")
+                print("\nEnter your choice : \n")
+
+                choice = await reader.readline()
+                choice = choice.decode('utf-8').strip()
+
+                if choice == '1':
+                    await hid_device.connect_control_channel()
+
+                elif choice == '2':
+                    await hid_device.connect_interrupt_channel()
+
+                elif choice == '3':
+                    await hid_device.disconnect_control_channel()
+
+                elif choice == '4':
+                    await hid_device.disconnect_interrupt_channel()
+
+                elif choice == '5':
+                    print(" 1. Report ID 0x01")
+                    print(" 2. Report ID 0x02")
+                    print(" 3. Invalid Report ID")
+
+                    choice1 = await reader.readline()
+                    choice1 = choice1.decode('utf-8').strip()
+
+                    if choice1 == '1':
+                        data = bytearray(
+                            [0x01, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00]
+                        )
+                        hid_device.send_data(data)
+                        data = bytearray(
+                            [0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
+                        )
+                        hid_device.send_data(data)
+
+                    elif choice1 == '2':
+                        data = bytearray([0x02, 0x00, 0x00, 0xF6])
+                        hid_device.send_data(data)
+                        data = bytearray([0x02, 0x00, 0x00, 0x00])
+                        hid_device.send_data(data)
+
+                    elif choice1 == '3':
+                        data = bytearray([0x00, 0x00, 0x00, 0x00])
+                        hid_device.send_data(data)
+                        data = bytearray([0x00, 0x00, 0x00, 0x00])
+                        hid_device.send_data(data)
+
+                    else:
+                        print('Incorrect option selected')
+
+                elif choice == '6':
+                    hid_device.virtual_cable_unplug()
+                    try:
+                        hid_host_bd_addr = str(hid_device.remote_device_bd_address)
+                        await device.keystore.delete(hid_host_bd_addr)
+                    except KeyError:
+                        print('Device not found or Device already unpaired.')
+
+                elif choice == '7':
+                    connection = hid_device.connection
+                    if connection is not None:
+                        await connection.disconnect()
+                    else:
+                        print("Already disconnected from device")
+
+                elif choice == '8':
+                    try:
+                        hid_host_bd_addr = str(hid_device.remote_device_bd_address)
+                        await device.keystore.delete(hid_host_bd_addr)
+                    except KeyError:
+                        print('Device NOT found or Device already unpaired.')
+
+                elif choice == '9':
+                    hid_host_bd_addr = str(hid_device.remote_device_bd_address)
+                    connection = await device.connect(
+                        hid_host_bd_addr, transport=BT_BR_EDR_TRANSPORT
+                    )
+                    await connection.authenticate()
+                    await connection.encrypt()
+
+                elif choice == '10':
+                    sys.exit("Exit successful")
+
+                else:
+                    print("Invalid option selected.")
+
+        if (len(sys.argv) > 3) and (sys.argv[3] == 'test-mode'):
+            # Test mode for PTS/Unit testing
+            await menu()
+        else:
+            # default option is using keyboard.html (web)
+            print("Executing in Web mode")
+            await keyboard_device(hid_device)
+
+        await hci_source.wait_for_termination()
+
+
+# -----------------------------------------------------------------------------
+logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'DEBUG').upper())
+asyncio.run(main())

examples/run_hid_host.py

@@ -285,7 +285,10 @@ async def main():
         print('example: run_hid_host.py classic1.json usb:0 E1:CA:72:48:C4:E8/P')
         return
 
-    def on_hid_data_cb(pdu):
+    def on_hid_control_data_cb(pdu: bytes):
+        print(f'Received Control Data, PDU: {pdu.hex()}')
+
+    def on_hid_interrupt_data_cb(pdu: bytes):
         report_type = pdu[0] & 0x0F
         if len(pdu) == 1:
             print(color(f'Warning: No report received', 'yellow'))
@@ -305,7 +308,7 @@ async def main():
 
         if (report_length <= 1) or (report_id == 0):
             return
-
+        # Parse report over interrupt channel
         if report_type == Message.ReportType.INPUT_REPORT:
             ReportParser.parse_input_report(pdu[1:])  # type: ignore
 
@@ -313,6 +316,8 @@ async def main():
         await hid_host.disconnect_interrupt_channel()
         await hid_host.disconnect_control_channel()
         await device.keystore.delete(target_address)  # type: ignore
+        connection = hid_host.connection
+        if connection is not None:
             await connection.disconnect()
 
     def on_hid_virtual_cable_unplug_cb():
@@ -325,6 +330,18 @@ async def main():
         # Create a device
         device = Device.from_config_file_with_hci(sys.argv[1], hci_source, hci_sink)
         device.classic_enabled = True
+
+        # Create HID host and start it
+        print('@@@ Starting HID Host...')
+        hid_host = Host(device)
+
+        # Register for HID data call back
+        hid_host.on('interrupt_data', on_hid_interrupt_data_cb)
+        hid_host.on('control_data', on_hid_control_data_cb)
+
+        # Register for virtual cable unplug call back
+        hid_host.on('virtual_cable_unplug', on_hid_virtual_cable_unplug_cb)
+
         await device.power_on()
 
         # Connect to a peer
@@ -345,16 +362,6 @@ async def main():
 
         await get_hid_device_sdp_record(connection)
 
-        # Create HID host and start it
-        print('@@@ Starting HID Host...')
-        hid_host = Host(device, connection)
-
-        # Register for HID data call back
-        hid_host.on('data', on_hid_data_cb)
-
-        # Register for virtual cable unplug call back
-        hid_host.on('virtual_cable_unplug', on_hid_virtual_cable_unplug_cb)
-
         async def menu():
             reader = await get_stream_reader(sys.stdin)
             while True:
@@ -369,13 +376,14 @@ async def main():
                 print(" 6. Set Report")
                 print(" 7. Set Protocol Mode")
                 print(" 8. Get Protocol Mode")
-                print(" 9. Send Report")
+                print(" 9. Send Report on Interrupt Channel")
                 print("10. Suspend")
                 print("11. Exit Suspend")
                 print("12. Virtual Cable Unplug")
                 print("13. Disconnect device")
                 print("14. Delete Bonding")
                 print("15. Re-connect to device")
+                print("16. Exit")
                 print("\nEnter your choice : \n")
 
                 choice = await reader.readline()
@@ -394,21 +402,40 @@ async def main():
                     await hid_host.disconnect_interrupt_channel()
 
                 elif choice == '5':
-                    print(" 1. Report ID 0x02")
+                    print(" 1. Input Report with ID 0x01")
-                    print(" 2. Report ID 0x03")
+                    print(" 2. Input Report with ID 0x02")
-                    print(" 3. Report ID 0x05")
+                    print(" 3. Input Report with ID 0x0F - Invalid ReportId")
+                    print(" 4. Output Report with ID 0x02")
+                    print(" 5. Feature Report with ID 0x05 - Unsupported Request")
+                    print(" 6. Input Report with ID 0x02, BufferSize 3")
+                    print(" 7. Output Report with ID 0x03, BufferSize 2")
+                    print(" 8. Feature Report with ID 0x05,  BufferSize 3")
                     choice1 = await reader.readline()
                     choice1 = choice1.decode('utf-8').strip()
 
                     if choice1 == '1':
-                        hid_host.get_report(1, 2, 3)
+                        hid_host.get_report(1, 1, 0)
 
                     elif choice1 == '2':
-                        hid_host.get_report(2, 3, 2)
+                        hid_host.get_report(1, 2, 0)
 
                     elif choice1 == '3':
-                        hid_host.get_report(3, 5, 3)
+                        hid_host.get_report(1, 5, 0)
 
+                    elif choice1 == '4':
+                        hid_host.get_report(2, 2, 0)
+
+                    elif choice1 == '5':
+                        hid_host.get_report(3, 15, 0)
+
+                    elif choice1 == '6':
+                        hid_host.get_report(1, 2, 3)
+
+                    elif choice1 == '7':
+                        hid_host.get_report(2, 3, 2)
+
+                    elif choice1 == '8':
+                        hid_host.get_report(3, 5, 3)
                     else:
                         print('Incorrect option selected')
 
@@ -484,6 +511,7 @@ async def main():
                     hid_host.virtual_cable_unplug()
                     try:
                         await device.keystore.delete(target_address)
+                        print("Unpair successful")
                     except KeyError:
                         print('Device not found or Device already unpaired.')
 
@@ -513,6 +541,9 @@ async def main():
                     await connection.authenticate()
                     await connection.encrypt()
 
+                elif choice == '16':
+                    sys.exit("Exit successful")
+
                 else:
                     print("Invalid option selected.")
 

examples/run_unicast_server.py

@@ -0,0 +1,190 @@
+# Copyright 2021-2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import asyncio
+import logging
+import sys
+import os
+import struct
+import secrets
+from bumble.core import AdvertisingData
+from bumble.device import Device, CisLink, AdvertisingParameters
+from bumble.hci import (
+    CodecID,
+    CodingFormat,
+    OwnAddressType,
+    HCI_IsoDataPacket,
+)
+from bumble.profiles.bap import (
+    CodecSpecificCapabilities,
+    ContextType,
+    AudioLocation,
+    SupportedSamplingFrequency,
+    SupportedFrameDuration,
+    PacRecord,
+    PublishedAudioCapabilitiesService,
+    AudioStreamControlService,
+)
+from bumble.profiles.cap import CommonAudioServiceService
+from bumble.profiles.csip import CoordinatedSetIdentificationService, SirkType
+
+from bumble.transport import open_transport_or_link
+
+
+# -----------------------------------------------------------------------------
+async def main() -> None:
+    if len(sys.argv) < 3:
+        print('Usage: run_cig_setup.py <config-file>' '<transport-spec-for-device>')
+        return
+
+    print('<<< connecting to HCI...')
+    async with await open_transport_or_link(sys.argv[2]) as hci_transport:
+        print('<<< connected')
+
+        device = Device.from_config_file_with_hci(
+            sys.argv[1], hci_transport.source, hci_transport.sink
+        )
+        device.cis_enabled = True
+
+        await device.power_on()
+
+        csis = CoordinatedSetIdentificationService(
+            set_identity_resolving_key=secrets.token_bytes(16),
+            set_identity_resolving_key_type=SirkType.PLAINTEXT,
+        )
+        device.add_service(CommonAudioServiceService(csis))
+        device.add_service(
+            PublishedAudioCapabilitiesService(
+                supported_source_context=ContextType.PROHIBITED,
+                available_source_context=ContextType.PROHIBITED,
+                supported_sink_context=ContextType.MEDIA,
+                available_sink_context=ContextType.MEDIA,
+                sink_audio_locations=(
+                    AudioLocation.FRONT_LEFT | AudioLocation.FRONT_RIGHT
+                ),
+                sink_pac=[
+                    # Codec Capability Setting 16_2
+                    PacRecord(
+                        coding_format=CodingFormat(CodecID.LC3),
+                        codec_specific_capabilities=CodecSpecificCapabilities(
+                            supported_sampling_frequencies=(
+                                SupportedSamplingFrequency.FREQ_16000
+                            ),
+                            supported_frame_durations=(
+                                SupportedFrameDuration.DURATION_10000_US_SUPPORTED
+                            ),
+                            supported_audio_channel_counts=[1],
+                            min_octets_per_codec_frame=40,
+                            max_octets_per_codec_frame=40,
+                            supported_max_codec_frames_per_sdu=1,
+                        ),
+                    ),
+                    # Codec Capability Setting 24_2
+                    PacRecord(
+                        coding_format=CodingFormat(CodecID.LC3),
+                        codec_specific_capabilities=CodecSpecificCapabilities(
+                            supported_sampling_frequencies=(
+                                SupportedSamplingFrequency.FREQ_48000
+                            ),
+                            supported_frame_durations=(
+                                SupportedFrameDuration.DURATION_10000_US_SUPPORTED
+                            ),
+                            supported_audio_channel_counts=[1],
+                            min_octets_per_codec_frame=120,
+                            max_octets_per_codec_frame=120,
+                            supported_max_codec_frames_per_sdu=1,
+                        ),
+                    ),
+                ],
+            )
+        )
+
+        device.add_service(AudioStreamControlService(device, sink_ase_id=[1, 2]))
+
+        advertising_data = (
+            bytes(
+                AdvertisingData(
+                    [
+                        (
+                            AdvertisingData.COMPLETE_LOCAL_NAME,
+                            bytes('Bumble LE Audio', 'utf-8'),
+                        ),
+                        (
+                            AdvertisingData.FLAGS,
+                            bytes(
+                                [
+                                    AdvertisingData.LE_GENERAL_DISCOVERABLE_MODE_FLAG
+                                    | AdvertisingData.BR_EDR_HOST_FLAG
+                                    | AdvertisingData.BR_EDR_CONTROLLER_FLAG
+                                ]
+                            ),
+                        ),
+                        (
+                            AdvertisingData.INCOMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS,
+                            bytes(PublishedAudioCapabilitiesService.UUID),
+                        ),
+                    ]
+                )
+            )
+            + csis.get_advertising_data()
+        )
+        subprocess = await asyncio.create_subprocess_shell(
+            f'dlc3 | ffplay pipe:0',
+            stdin=asyncio.subprocess.PIPE,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE,
+        )
+
+        stdin = subprocess.stdin
+        assert stdin
+
+        # Write a fake LC3 header to dlc3.
+        stdin.write(
+            bytes([0x1C, 0xCC])  # Header.
+            + struct.pack(
+                '<HHHHHHI',
+                18,  # Header length.
+                48000 // 100,  # Sampling Rate(/100Hz).
+                0,  # Bitrate(unused).
+                1,  # Channels.
+                10000 // 10,  # Frame duration(/10us).
+                0,  # RFU.
+                0x0FFFFFFF,  # Frame counts.
+            )
+        )
+
+        def on_pdu(pdu: HCI_IsoDataPacket):
+            # LC3 format: |frame_length(2)| + |frame(length)|.
+            if pdu.iso_sdu_length:
+                stdin.write(struct.pack('<H', pdu.iso_sdu_length))
+            stdin.write(pdu.iso_sdu_fragment)
+
+        def on_cis(cis_link: CisLink):
+            cis_link.on('pdu', on_pdu)
+
+        device.once('cis_establishment', on_cis)
+
+        advertising_set = await device.create_advertising_set(
+            advertising_data=advertising_data,
+        )
+
+        await hci_transport.source.terminated
+
+
+# -----------------------------------------------------------------------------
+logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'DEBUG').upper())
+asyncio.run(main())

examples/run_vcp_renderer.py

@@ -0,0 +1,191 @@
+# Copyright 2021-2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import asyncio
+import logging
+import sys
+import os
+import secrets
+import websockets
+import json
+
+from bumble.core import AdvertisingData
+from bumble.device import Device, AdvertisingParameters, AdvertisingEventProperties
+from bumble.hci import (
+    CodecID,
+    CodingFormat,
+    OwnAddressType,
+)
+from bumble.profiles.bap import (
+    CodecSpecificCapabilities,
+    ContextType,
+    AudioLocation,
+    SupportedSamplingFrequency,
+    SupportedFrameDuration,
+    PacRecord,
+    PublishedAudioCapabilitiesService,
+    AudioStreamControlService,
+)
+from bumble.profiles.cap import CommonAudioServiceService
+from bumble.profiles.csip import CoordinatedSetIdentificationService, SirkType
+from bumble.profiles.vcp import VolumeControlService
+
+from bumble.transport import open_transport_or_link
+
+from typing import Optional
+
+
+def dumps_volume_state(volume_setting: int, muted: int, change_counter: int) -> str:
+    return json.dumps(
+        {
+            'volume_setting': volume_setting,
+            'muted': muted,
+            'change_counter': change_counter,
+        }
+    )
+
+
+# -----------------------------------------------------------------------------
+async def main() -> None:
+    if len(sys.argv) < 3:
+        print('Usage: run_vcp_renderer.py <config-file>' '<transport-spec-for-device>')
+        return
+
+    print('<<< connecting to HCI...')
+    async with await open_transport_or_link(sys.argv[2]) as hci_transport:
+        print('<<< connected')
+
+        device = Device.from_config_file_with_hci(
+            sys.argv[1], hci_transport.source, hci_transport.sink
+        )
+
+        await device.power_on()
+
+        # Add "placeholder" services to enable Android LEA features.
+        csis = CoordinatedSetIdentificationService(
+            set_identity_resolving_key=secrets.token_bytes(16),
+            set_identity_resolving_key_type=SirkType.PLAINTEXT,
+        )
+        device.add_service(CommonAudioServiceService(csis))
+        device.add_service(
+            PublishedAudioCapabilitiesService(
+                supported_source_context=ContextType.PROHIBITED,
+                available_source_context=ContextType.PROHIBITED,
+                supported_sink_context=ContextType.MEDIA,
+                available_sink_context=ContextType.MEDIA,
+                sink_audio_locations=(
+                    AudioLocation.FRONT_LEFT | AudioLocation.FRONT_RIGHT
+                ),
+                sink_pac=[
+                    # Codec Capability Setting 48_4
+                    PacRecord(
+                        coding_format=CodingFormat(CodecID.LC3),
+                        codec_specific_capabilities=CodecSpecificCapabilities(
+                            supported_sampling_frequencies=(
+                                SupportedSamplingFrequency.FREQ_48000
+                            ),
+                            supported_frame_durations=(
+                                SupportedFrameDuration.DURATION_10000_US_SUPPORTED
+                            ),
+                            supported_audio_channel_counts=[1],
+                            min_octets_per_codec_frame=120,
+                            max_octets_per_codec_frame=120,
+                            supported_max_codec_frames_per_sdu=1,
+                        ),
+                    ),
+                ],
+            )
+        )
+        device.add_service(AudioStreamControlService(device, sink_ase_id=[1, 2]))
+
+        vcs = VolumeControlService()
+        device.add_service(vcs)
+
+        ws: Optional[websockets.WebSocketServerProtocol] = None
+
+        def on_volume_state(volume_setting: int, muted: int, change_counter: int):
+            if ws:
+                asyncio.create_task(
+                    ws.send(dumps_volume_state(volume_setting, muted, change_counter))
+                )
+
+        vcs.on('volume_state', on_volume_state)
+
+        advertising_data = (
+            bytes(
+                AdvertisingData(
+                    [
+                        (
+                            AdvertisingData.COMPLETE_LOCAL_NAME,
+                            bytes('Bumble LE Audio', 'utf-8'),
+                        ),
+                        (
+                            AdvertisingData.FLAGS,
+                            bytes(
+                                [
+                                    AdvertisingData.LE_GENERAL_DISCOVERABLE_MODE_FLAG
+                                    | AdvertisingData.BR_EDR_HOST_FLAG
+                                    | AdvertisingData.BR_EDR_CONTROLLER_FLAG
+                                ]
+                            ),
+                        ),
+                        (
+                            AdvertisingData.INCOMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS,
+                            bytes(PublishedAudioCapabilitiesService.UUID),
+                        ),
+                    ]
+                )
+            )
+            + csis.get_advertising_data()
+        )
+
+        await device.create_advertising_set(
+            advertising_parameters=AdvertisingParameters(
+                advertising_event_properties=AdvertisingEventProperties(),
+                own_address_type=OwnAddressType.PUBLIC,
+            ),
+            advertising_data=advertising_data,
+        )
+
+        async def serve(websocket: websockets.WebSocketServerProtocol, _path):
+            nonlocal ws
+            await websocket.send(
+                dumps_volume_state(vcs.volume_setting, vcs.muted, vcs.change_counter)
+            )
+            ws = websocket
+            async for message in websocket:
+                volume_state = json.loads(message)
+                vcs.volume_state_bytes = bytes(
+                    [
+                        volume_state['volume_setting'],
+                        volume_state['muted'],
+                        volume_state['change_counter'],
+                    ]
+                )
+                await device.notify_subscribers(
+                    vcs.volume_state, vcs.volume_state_bytes
+                )
+            ws = None
+
+        await websockets.serve(serve, 'localhost', 8989)
+
+        await hci_transport.source.terminated
+
+
+# -----------------------------------------------------------------------------
+logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'DEBUG').upper())
+asyncio.run(main())

examples/vcp_renderer.html

@@ -0,0 +1,103 @@
+<html data-bs-theme="dark">
+
+<head>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet"
+        integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
+
+</head>
+
+<body>
+
+    <div class="container">
+
+        <label for="server-port" class="form-label">Server Port</label>
+        <div class="input-group mb-3">
+            <input type="text" class="form-control" aria-label="Port Number" value="8989" id="port">
+            <button class="btn btn-primary" type="button" onclick="connect()">Connect</button>
+        </div>
+
+        <div class="row">
+            <div class="col">
+                <label for="volume_setting" class="form-label">Volume Setting</label>
+                <input type="range" class="form-range" min="0" max="255" id="volume_setting">
+            </div>
+            <div class="col">
+                <label for="change_counter" class="form-label">Change Counter</label>
+                <input type="range" class="form-range" min="0" max="255" id="change_counter">
+            </div>
+            <div class="col">
+                <div class="form-check form-switch">
+                    <input class="form-check-input" type="checkbox" role="switch" id="muted">
+                    <label class="form-check-label" for="muted">Muted</label>
+                </div>
+            </div>
+        </div>
+
+        <button class="btn btn-primary" type="button" onclick="update_state()">Notify New Volume State</button>
+
+
+        <hr>
+        <div id="socketStateContainer" class="bg-body-tertiary p-3 rounded-2">
+            <h3>Log</h3>
+            <code id="socketState">
+            </code>
+        </div>
+    </div>
+
+    <script>
+        let portInput = document.getElementById("port")
+        let volumeSetting = document.getElementById("volume_setting")
+        let muted = document.getElementById("muted")
+        let changeCounter = document.getElementById("change_counter")
+        let socket = null
+
+        function connect() {
+            if (socket != null) {
+                return
+            }
+            socket = new WebSocket(`ws://localhost:${portInput.value}`);
+            socket.onopen = _ => {
+                socketState.innerText += 'OPEN\n'
+            }
+            socket.onclose = _ => {
+                socketState.innerText += 'CLOSED\n'
+                socket = null
+            }
+            socket.onerror = (error) => {
+                socketState.innerText += 'ERROR\n'
+                console.log(`ERROR: ${error}`)
+            }
+            socket.onmessage = (event) => {
+                socketState.innerText += `<- ${event.data}\n`
+                let volume_state = JSON.parse(event.data)
+                volumeSetting.value = volume_state.volume_setting
+                changeCounter.value = volume_state.change_counter
+                muted.checked = volume_state.muted ? true : false
+            }
+        }
+
+        function send(message) {
+            if (socket && socket.readyState == WebSocket.OPEN) {
+                let jsonMessage = JSON.stringify(message)
+                socketState.innerText += `-> ${jsonMessage}\n`
+                socket.send(jsonMessage)
+            } else {
+                socketState.innerText += 'NOT CONNECTED\n'
+            }
+        }
+
+        function update_state() {
+            send({
+                volume_setting: parseInt(volumeSetting.value),
+                change_counter: parseInt(changeCounter.value),
+                muted: muted.checked ? 1 : 0
+            })
+        }
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"
+        integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL"
+        crossorigin="anonymous"></script>
+
+</body>
+
+</html>

extras/android/BtBench/app/src/main/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+    package="com.github.google.bumble.btbench">
-
+     <uses-sdk android:minSdkVersion="30" android:targetSdkVersion="34" />
     <!-- Request legacy Bluetooth permissions on older devices. -->
     <uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30" />
@@ -22,11 +22,10 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.BTBench"
-        tools:targetApi="31">
+        >
         <activity
             android:name=".MainActivity"
             android:exported="true"
-            android:label="@string/app_name"
             android:theme="@style/Theme.BTBench">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

extras/android/BtBench/app/src/main/java/com/github/google/bumble/btbench/L2capClient.kt

@@ -16,17 +16,83 @@ package com.github.google.bumble.btbench
 
 import android.annotation.SuppressLint
 import android.bluetooth.BluetoothAdapter
-import java.io.IOException
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattCallback
+import android.bluetooth.BluetoothProfile
+import android.content.Context
+import android.os.Build
 import java.util.logging.Logger
-import kotlin.concurrent.thread
 
 private val Log = Logger.getLogger("btbench.l2cap-client")
 
-class L2capClient(private val viewModel: AppViewModel, val bluetoothAdapter: BluetoothAdapter) {
+class L2capClient(
+    private val viewModel: AppViewModel,
+    private val bluetoothAdapter: BluetoothAdapter,
+    private val context: Context
+) {
     @SuppressLint("MissingPermission")
     fun run() {
         viewModel.running = true
-        val remoteDevice = bluetoothAdapter.getRemoteDevice(viewModel.peerBluetoothAddress)
+        val addressIsPublic = viewModel.peerBluetoothAddress.endsWith("/P")
+        val address = viewModel.peerBluetoothAddress.take(17)
+        val remoteDevice = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            bluetoothAdapter.getRemoteLeDevice(
+                address,
+                if (addressIsPublic) {
+                    BluetoothDevice.ADDRESS_TYPE_PUBLIC
+                } else {
+                    BluetoothDevice.ADDRESS_TYPE_RANDOM
+                }
+            )
+        } else {
+            bluetoothAdapter.getRemoteDevice(address)
+        }
+
+        val gatt = remoteDevice.connectGatt(
+            context,
+            false,
+            object : BluetoothGattCallback() {
+                override fun onMtuChanged(gatt: BluetoothGatt, mtu: Int, status: Int) {
+                    Log.info("MTU update: mtu=$mtu status=$status")
+                    viewModel.mtu = mtu
+                }
+
+                override fun onPhyUpdate(gatt: BluetoothGatt, txPhy: Int, rxPhy: Int, status: Int) {
+                    Log.info("PHY update: tx=$txPhy, rx=$rxPhy, status=$status")
+                    viewModel.txPhy = txPhy
+                    viewModel.rxPhy = rxPhy
+                }
+
+                override fun onPhyRead(gatt: BluetoothGatt, txPhy: Int, rxPhy: Int, status: Int) {
+                    Log.info("PHY: tx=$txPhy, rx=$rxPhy, status=$status")
+                    viewModel.txPhy = txPhy
+                    viewModel.rxPhy = rxPhy
+                }
+
+                override fun onConnectionStateChange(
+                    gatt: BluetoothGatt?, status: Int, newState: Int
+                ) {
+                    if (gatt != null && newState == BluetoothProfile.STATE_CONNECTED) {
+                        if (viewModel.use2mPhy) {
+                            gatt.setPreferredPhy(
+                                BluetoothDevice.PHY_LE_2M_MASK,
+                                BluetoothDevice.PHY_LE_2M_MASK,
+                                BluetoothDevice.PHY_OPTION_NO_PREFERRED
+                            )
+                        }
+                        gatt.readPhy()
+
+                        // Request an MTU update, even though we don't use GATT, because Android
+                        // won't request a larger link layer maximum data length otherwise.
+                        gatt.requestMtu(517)
+                    }
+                }
+            },
+            BluetoothDevice.TRANSPORT_LE,
+            if (viewModel.use2mPhy) BluetoothDevice.PHY_LE_2M_MASK else BluetoothDevice.PHY_LE_1M_MASK
+        )
+
         val socket = remoteDevice.createInsecureL2capChannel(viewModel.l2capPsm)
 
         val client = SocketClient(viewModel, socket)

extras/android/BtBench/app/src/main/java/com/github/google/bumble/btbench/L2capServer.kt

@@ -30,7 +30,7 @@ private val Log = Logger.getLogger("btbench.l2cap-server")
 class L2capServer(private val viewModel: AppViewModel, private val bluetoothAdapter: BluetoothAdapter) {
     @SuppressLint("MissingPermission")
     fun run() {
-        // Advertise to that the peer can find us and connect.
+        // Advertise so that the peer can find us and connect.
         val callback = object: AdvertiseCallback() {
             override fun onStartFailure(errorCode: Int) {
                 Log.warning("failed to start advertising: $errorCode")
@@ -50,13 +50,12 @@ class L2capServer(private val viewModel: AppViewModel, private val bluetoothAdap
         val advertiseData = AdvertiseData.Builder().build()
         val scanData = AdvertiseData.Builder().setIncludeDeviceName(true).build()
         val advertiser = bluetoothAdapter.bluetoothLeAdvertiser
-        advertiser.startAdvertising(advertiseSettings, advertiseData, scanData, callback)
 
         val serverSocket = bluetoothAdapter.listenUsingInsecureL2capChannel()
         viewModel.l2capPsm = serverSocket.psm
         Log.info("psm = $serverSocket.psm")
 
         val server = SocketServer(viewModel, serverSocket)
-        server.run({ advertiser.stopAdvertising(callback) })
+        server.run({ advertiser.stopAdvertising(callback) }, { advertiser.startAdvertising(advertiseSettings, advertiseData, scanData, callback) })
     }
 }

extras/android/BtBench/app/src/main/java/com/github/google/bumble/btbench/MainActivity.kt

@@ -26,23 +26,33 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Button
 import androidx.compose.material3.Divider
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Slider
 import androidx.compose.material3.Surface
+import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextField
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.ExperimentalComposeUiApi
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.platform.LocalSoftwareKeyboardController
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.ImeAction
@@ -171,7 +181,7 @@ class MainActivity : ComponentActivity() {
     }
 
     private fun runL2capClient() {
-        val l2capClient = bluetoothAdapter?.let { L2capClient(appViewModel, it) }
+        val l2capClient = bluetoothAdapter?.let { L2capClient(appViewModel, it, baseContext) }
         l2capClient?.run()
     }
 
@@ -199,9 +209,12 @@ fun MainView(
     runL2capServer: () -> Unit
 ) {
     BTBenchTheme {
-        // A surface container using the 'background' color from the theme
+        val scrollState = rememberScrollState()
         Surface(
-            modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background
+            modifier = Modifier
+                .fillMaxSize()
+                .verticalScroll(scrollState),
+            color = MaterialTheme.colorScheme.background
         ) {
             Column(modifier = Modifier.padding(horizontal = 16.dp)) {
                 Text(
@@ -212,28 +225,33 @@ fun MainView(
                 )
                 Divider()
                 val keyboardController = LocalSoftwareKeyboardController.current
-                TextField(label = {
+                val focusRequester = remember { FocusRequester() }
+                val focusManager = LocalFocusManager.current
+                TextField(
+                    label = {
                         Text(text = "Peer Bluetooth Address")
                     },
                     value = appViewModel.peerBluetoothAddress,
-                    modifier = Modifier.fillMaxWidth(),
+                    modifier = Modifier.fillMaxWidth().focusRequester(focusRequester),
                     keyboardOptions = KeyboardOptions.Default.copy(
                         keyboardType = KeyboardType.Ascii, imeAction = ImeAction.Done
                     ),
                     onValueChange = {
                         appViewModel.updatePeerBluetoothAddress(it)
                     },
-                    keyboardActions = KeyboardActions(onDone = { keyboardController?.hide() })
+                    keyboardActions = KeyboardActions(onDone = {
+                        keyboardController?.hide()
+                        focusManager.clearFocus()
+                    })
                 )
                 Divider()
                 TextField(label = {
                     Text(text = "L2CAP PSM")
                 },
                     value = appViewModel.l2capPsm.toString(),
-                    modifier = Modifier.fillMaxWidth(),
+                    modifier = Modifier.fillMaxWidth().focusRequester(focusRequester),
                     keyboardOptions = KeyboardOptions.Default.copy(
-                        keyboardType = KeyboardType.Number,
+                        keyboardType = KeyboardType.Number, imeAction = ImeAction.Done
-                        imeAction = ImeAction.Done
                     ),
                     onValueChange = {
                         if (it.isNotEmpty()) {
@@ -243,7 +261,11 @@ fun MainView(
                             }
                         }
                     },
-                    keyboardActions = KeyboardActions(onDone = { keyboardController?.hide() }))
+                    keyboardActions = KeyboardActions(onDone = {
+                        keyboardController?.hide()
+                        focusManager.clearFocus()
+                    })
+                )
                 Divider()
                 Slider(
                     value = appViewModel.senderPacketCountSlider, onValueChange = {
@@ -264,7 +286,19 @@ fun MainView(
                 ActionButton(
                     text = "Become Discoverable", onClick = becomeDiscoverable, true
                 )
-                Row() {
+                Row(
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Text(text = "2M PHY")
+                    Spacer(modifier = Modifier.padding(start = 8.dp))
+                    Switch(
+                        checked = appViewModel.use2mPhy,
+                        onCheckedChange = { appViewModel.use2mPhy = it }
+                    )
+
+                }
+                Row {
                     ActionButton(
                         text = "RFCOMM Client", onClick = runRfcommClient, !appViewModel.running
                     )
@@ -272,7 +306,7 @@ fun MainView(
                         text = "RFCOMM Server", onClick = runRfcommServer, !appViewModel.running
                     )
                 }
-                Row() {
+                Row {
                     ActionButton(
                         text = "L2CAP Client", onClick = runL2capClient, !appViewModel.running
                     )
@@ -281,6 +315,12 @@ fun MainView(
                     )
                 }
                 Divider()
+                Text(
+                    text = if (appViewModel.mtu != 0) "MTU: ${appViewModel.mtu}" else ""
+                )
+                Text(
+                    text = if (appViewModel.rxPhy != 0 || appViewModel.txPhy != 0) "PHY: tx=${appViewModel.txPhy}, rx=${appViewModel.rxPhy}" else ""
+                )
                 Text(
                     text = "Packets Sent: ${appViewModel.packetsSent}"
                 )

extras/android/BtBench/app/src/main/java/com/github/google/bumble/btbench/Model.kt

@@ -23,15 +23,20 @@ import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import java.util.UUID
 
-val DEFAULT_RFCOMM_UUID = UUID.fromString("E6D55659-C8B4-4B85-96BB-B1143AF6D3AE")
+val DEFAULT_RFCOMM_UUID: UUID = UUID.fromString("E6D55659-C8B4-4B85-96BB-B1143AF6D3AE")
 const val DEFAULT_PEER_BLUETOOTH_ADDRESS = "AA:BB:CC:DD:EE:FF"
 const val DEFAULT_SENDER_PACKET_COUNT = 100
 const val DEFAULT_SENDER_PACKET_SIZE = 1024
+const val DEFAULT_PSM = 128
 
 class AppViewModel : ViewModel() {
     private var preferences: SharedPreferences? = null
     var peerBluetoothAddress by mutableStateOf(DEFAULT_PEER_BLUETOOTH_ADDRESS)
-    var l2capPsm by mutableStateOf(0)
+    var l2capPsm by mutableIntStateOf(DEFAULT_PSM)
+    var use2mPhy by mutableStateOf(true)
+    var mtu by mutableIntStateOf(0)
+    var rxPhy by mutableIntStateOf(0)
+    var txPhy by mutableIntStateOf(0)
     var senderPacketCountSlider by mutableFloatStateOf(0.0F)
     var senderPacketSizeSlider by mutableFloatStateOf(0.0F)
     var senderPacketCount by mutableIntStateOf(DEFAULT_SENDER_PACKET_COUNT)
@@ -64,28 +69,29 @@ class AppViewModel : ViewModel() {
     }
 
     fun updatePeerBluetoothAddress(peerBluetoothAddress: String) {
-        this.peerBluetoothAddress = peerBluetoothAddress
+        val address = peerBluetoothAddress.uppercase()
+        this.peerBluetoothAddress = address
 
         // Save the address to the preferences
         with(preferences!!.edit()) {
-            putString(PEER_BLUETOOTH_ADDRESS_PREF_KEY, peerBluetoothAddress)
+            putString(PEER_BLUETOOTH_ADDRESS_PREF_KEY, address)
             apply()
         }
     }
 
     fun updateSenderPacketCountSlider() {
-        if (senderPacketCount <= 10) {
+        senderPacketCountSlider = if (senderPacketCount <= 10) {
-            senderPacketCountSlider = 0.0F
+            0.0F
         } else if (senderPacketCount <= 50) {
-            senderPacketCountSlider = 0.2F
+            0.2F
         } else if (senderPacketCount <= 100) {
-            senderPacketCountSlider = 0.4F
+            0.4F
         } else if (senderPacketCount <= 500) {
-            senderPacketCountSlider = 0.6F
+            0.6F
         } else if (senderPacketCount <= 1000) {
-            senderPacketCountSlider = 0.8F
+            0.8F
         } else {
-            senderPacketCountSlider = 1.0F
+            1.0F
         }
 
         with(preferences!!.edit()) {
@@ -95,18 +101,18 @@ class AppViewModel : ViewModel() {
     }
 
     fun updateSenderPacketCount() {
-        if (senderPacketCountSlider < 0.1F) {
+        senderPacketCount = if (senderPacketCountSlider < 0.1F) {
-            senderPacketCount = 10
+            10
         } else if (senderPacketCountSlider < 0.3F) {
-            senderPacketCount = 50
+            50
         } else if (senderPacketCountSlider < 0.5F) {
-            senderPacketCount = 100
+            100
         } else if (senderPacketCountSlider < 0.7F) {
-            senderPacketCount = 500
+            500
         } else if (senderPacketCountSlider < 0.9F) {
-            senderPacketCount = 1000
+            1000
         } else {
-            senderPacketCount = 10000
+            10000
         }
 
         with(preferences!!.edit()) {
@@ -116,18 +122,18 @@ class AppViewModel : ViewModel() {
     }
 
     fun updateSenderPacketSizeSlider() {
-        if (senderPacketSize <= 1) {
+        senderPacketSizeSlider = if (senderPacketSize <= 16) {
-            senderPacketSizeSlider = 0.0F
+            0.0F
         } else if (senderPacketSize <= 256) {
-            senderPacketSizeSlider = 0.02F
+            0.02F
         } else if (senderPacketSize <= 512) {
-            senderPacketSizeSlider = 0.4F
+            0.4F
         } else if (senderPacketSize <= 1024) {
-            senderPacketSizeSlider = 0.6F
+            0.6F
         } else if (senderPacketSize <= 2048) {
-            senderPacketSizeSlider = 0.8F
+            0.8F
         } else {
-            senderPacketSizeSlider = 1.0F
+            1.0F
         }
 
         with(preferences!!.edit()) {
@@ -137,18 +143,18 @@ class AppViewModel : ViewModel() {
     }
 
     fun updateSenderPacketSize() {
-        if (senderPacketSizeSlider < 0.1F) {
+        senderPacketSize = if (senderPacketSizeSlider < 0.1F) {
-            senderPacketSize = 1
+            16
         } else if (senderPacketSizeSlider < 0.3F) {
-            senderPacketSize = 256
+            256
         } else if (senderPacketSizeSlider < 0.5F) {
-            senderPacketSize = 512
+            512
         } else if (senderPacketSizeSlider < 0.7F) {
-            senderPacketSize = 1024
+            1024
         } else if (senderPacketSizeSlider < 0.9F) {
-            senderPacketSize = 2048
+            2048
         } else {
-            senderPacketSize = 4096
+            4096
         }
 
         with(preferences!!.edit()) {

extras/android/BtBench/app/src/main/java/com/github/google/bumble/btbench/RfcommClient.kt

@@ -25,7 +25,8 @@ private val Log = Logger.getLogger("btbench.rfcomm-client")
 class RfcommClient(private val viewModel: AppViewModel, val bluetoothAdapter: BluetoothAdapter) {
     @SuppressLint("MissingPermission")
     fun run() {
-        val remoteDevice = bluetoothAdapter.getRemoteDevice(viewModel.peerBluetoothAddress)
+        val address = viewModel.peerBluetoothAddress.take(17)
+        val remoteDevice = bluetoothAdapter.getRemoteDevice(address)
         val socket = remoteDevice.createInsecureRfcommSocketToServiceRecord(
             DEFAULT_RFCOMM_UUID
         )

extras/android/BtBench/app/src/main/java/com/github/google/bumble/btbench/RfcommServer.kt

@@ -30,6 +30,6 @@ class RfcommServer(private val viewModel: AppViewModel, val bluetoothAdapter: Bl
         )
 
         val server = SocketServer(viewModel, serverSocket)
-        server.run({})
+        server.run({}, {})
     }
 }

extras/android/BtBench/app/src/main/java/com/github/google/bumble/btbench/SocketClient.kt

@@ -22,6 +22,8 @@ import kotlin.concurrent.thread
 
 private val Log = Logger.getLogger("btbench.socket-client")
 
+private const val DEFAULT_STARTUP_DELAY = 3000
+
 class SocketClient(private val viewModel: AppViewModel, private val socket: BluetoothSocket) {
     @SuppressLint("MissingPermission")
     fun run() {
@@ -56,6 +58,10 @@ class SocketClient(private val viewModel: AppViewModel, private val socket: Blue
                 socketDataSource.receive()
             }
 
+            Log.info("Startup delay: $DEFAULT_STARTUP_DELAY")
+            Thread.sleep(DEFAULT_STARTUP_DELAY.toLong());
+            Log.info("Starting to send")
+
             sender.run()
             cleanup()
         }

extras/android/BtBench/app/src/main/java/com/github/google/bumble/btbench/SocketServer.kt

@@ -22,14 +22,13 @@ import kotlin.concurrent.thread
 private val Log = Logger.getLogger("btbench.socket-server")
 
 class SocketServer(private val viewModel: AppViewModel, private val serverSocket: BluetoothServerSocket) {
-    fun run(onTerminate: () -> Unit) {
+    fun run(onConnected: () -> Unit, onDisconnected: () -> Unit) {
         var aborted = false
         viewModel.running = true
 
         fun cleanup() {
             serverSocket.close()
             viewModel.running = false
-            onTerminate()
         }
 
         thread(name = "SocketServer") {
@@ -38,6 +37,7 @@ class SocketServer(private val viewModel: AppViewModel, private val serverSocket
                     serverSocket.close()
                 }
                 Log.info("waiting for connection...")
+                onDisconnected()
                 val socket = try {
                     serverSocket.accept()
                 } catch (error: IOException) {
@@ -45,7 +45,8 @@ class SocketServer(private val viewModel: AppViewModel, private val serverSocket
                     cleanup()
                     return@thread
                 }
-                Log.info("got connection")
+                Log.info("got connection from ${socket.remoteDevice.address}")
+                onConnected()
 
                 viewModel.aborter = {
                     aborted = true

extras/android/RemoteHCI/app/build.gradle.kts

@@ -10,7 +10,7 @@ android {
 
     defaultConfig {
         applicationId = "com.github.google.bumble.remotehci"
-        minSdk = 26
+        minSdk = 29
         targetSdk = 33
         versionCode = 1
         versionName = "1.0"

extras/android/RemoteHCI/app/src/main/java/com/github/google/bumble/remotehci/HciHal.java

@@ -4,6 +4,7 @@ import android.hardware.bluetooth.V1_0.Status;
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.ServiceManager;
+import android.os.Trace;
 import android.util.Log;
 
 import java.util.ArrayList;
@@ -53,6 +54,7 @@ class HciHidlHal extends android.hardware.bluetooth.V1_0.IBluetoothHciCallbacks.
     private final android.hardware.bluetooth.V1_0.IBluetoothHci mHciService;
     private final HciHalCallback mHciCallbacks;
     private int mInitializationStatus = -1;
+    private final boolean mTracingEnabled = Trace.isEnabled();
 
 
     public static HciHidlHal create(HciHalCallback hciCallbacks) {
@@ -89,6 +91,7 @@ class HciHidlHal extends android.hardware.bluetooth.V1_0.IBluetoothHciCallbacks.
         }
 
         // Map the status code.
+        Log.d(TAG, "Initialization status = " + mInitializationStatus);
         switch (mInitializationStatus) {
             case android.hardware.bluetooth.V1_0.Status.SUCCESS:
                 return Status.SUCCESS;
@@ -108,6 +111,10 @@ class HciHidlHal extends android.hardware.bluetooth.V1_0.IBluetoothHciCallbacks.
     public void sendPacket(HciPacket.Type type, byte[] packet) {
         ArrayList<Byte> data = HciPacket.byteArrayToList(packet);
 
+        if (mTracingEnabled) {
+            Trace.beginAsyncSection("SEND_PACKET_TO_HAL", 1);
+        }
+
         try {
             switch (type) {
                 case COMMAND:
@@ -125,6 +132,10 @@ class HciHidlHal extends android.hardware.bluetooth.V1_0.IBluetoothHciCallbacks.
         } catch (RemoteException error) {
             Log.w(TAG, "failed to forward packet: " + error);
         }
+
+        if (mTracingEnabled) {
+            Trace.endAsyncSection("SEND_PACKET_TO_HAL", 1);
+        }
     }
 
     @Override
@@ -157,6 +168,7 @@ class HciAidlHal extends android.hardware.bluetooth.IBluetoothHciCallbacks.Stub
     private final android.hardware.bluetooth.IBluetoothHci mHciService;
     private final HciHalCallback mHciCallbacks;
     private int mInitializationStatus = android.hardware.bluetooth.Status.SUCCESS;
+    private final boolean mTracingEnabled = Trace.isEnabled();
 
     public static HciAidlHal create(HciHalCallback hciCallbacks) {
         IBinder binder = ServiceManager.getService("android.hardware.bluetooth.IBluetoothHci/default");
@@ -187,6 +199,7 @@ class HciAidlHal extends android.hardware.bluetooth.IBluetoothHciCallbacks.Stub
         }
 
         // Map the status code.
+        Log.d(TAG, "Initialization status = " + mInitializationStatus);
         switch (mInitializationStatus) {
             case android.hardware.bluetooth.Status.SUCCESS:
                 return Status.SUCCESS;
@@ -208,6 +221,10 @@ class HciAidlHal extends android.hardware.bluetooth.IBluetoothHciCallbacks.Stub
     // HciHal methods.
     @Override
     public void sendPacket(HciPacket.Type type, byte[] packet) {
+        if (mTracingEnabled) {
+            Trace.beginAsyncSection("SEND_PACKET_TO_HAL", 1);
+        }
+
         try {
             switch (type) {
                 case COMMAND:
@@ -229,6 +246,10 @@ class HciAidlHal extends android.hardware.bluetooth.IBluetoothHciCallbacks.Stub
         } catch (RemoteException error) {
             Log.w(TAG, "failed to forward packet: " + error);
         }
+
+        if (mTracingEnabled) {
+            Trace.endAsyncSection("SEND_PACKET_TO_HAL", 1);
+        }
     }
 
     // IBluetoothHciCallbacks methods.

extras/android/RemoteHCI/app/src/main/java/com/github/google/bumble/remotehci/HciServer.java

@@ -1,5 +1,6 @@
 package com.github.google.bumble.remotehci;
 
+import android.os.Trace;
 import android.util.Log;
 
 import java.io.IOException;
@@ -15,6 +16,7 @@ public class HciServer {
     private final int mPort;
     private final Listener mListener;
     private OutputStream mOutputStream;
+    private final boolean mTracingEnabled = Trace.isEnabled();
 
     public interface Listener extends HciParser.Sink {
         void onHostConnectionState(boolean connected);
@@ -27,6 +29,8 @@ public class HciServer {
     }
 
     public void run() throws IOException {
+        Log.i(TAG, "Tracing enabled: "  + mTracingEnabled);
+
         for (;;) {
             try {
                 loop();
@@ -42,6 +46,7 @@ public class HciServer {
         try (ServerSocket serverSocket = new ServerSocket(mPort)) {
             mListener.onMessage("Waiting for connection on port " + serverSocket.getLocalPort());
             try (Socket clientSocket = serverSocket.accept()) {
+                clientSocket.setTcpNoDelay(true);
                 mListener.onHostConnectionState(true);
                 mListener.onMessage("Connected");
                 HciParser parser = new HciParser(mListener);
@@ -72,6 +77,10 @@ public class HciServer {
     }
 
     public void sendPacket(HciPacket.Type type, byte[] packet) {
+        if (mTracingEnabled) {
+            Trace.beginAsyncSection("SEND_PACKET_FROM_HAL", 2);
+        }
+
         // Create a combined data buffer so we can write it out in a single call.
         byte[] data = new byte[packet.length + 1];
         data[0] = type.value;
@@ -88,5 +97,9 @@ public class HciServer {
                 Log.d(TAG, "no client, dropping packet");
             }
         }
+
+        if (mTracingEnabled) {
+            Trace.endAsyncSection("SEND_PACKET_FROM_HAL", 2);
+        }
     }
 }

extras/android/RemoteHCI/app/src/main/java/com/github/google/bumble/remotehci/MainActivity.kt

@@ -10,8 +10,10 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Button
 import androidx.compose.material3.Divider
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -138,7 +140,8 @@ class MainActivity : ComponentActivity() {
                 log.warning("Exception while running HCI Server: $error")
             } catch (error: HalException) {
                 log.warning("HAL exception: ${error.message}")
-                appViewModel.message = "Cannot bind to HAL (${error.message}). You may need to use the command 'setenforce 0' in a root adb shell."
+                appViewModel.message =
+                    "Cannot bind to HAL (${error.message}). You may need to use the command 'setenforce 0' in a root adb shell."
             }
             log.info("HCI Proxy thread ended")
             appViewModel.canStart = true
@@ -157,9 +160,12 @@ fun ActionButton(text: String, onClick: () -> Unit, enabled: Boolean) {
 @Composable
 fun MainView(appViewModel: AppViewModel, startProxy: () -> Unit) {
     RemoteHCITheme {
-        // A surface container using the 'background' color from the theme
+        val scrollState = rememberScrollState()
         Surface(
-            modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background
+            modifier = Modifier
+                .fillMaxSize()
+                .verticalScroll(scrollState),
+            color = MaterialTheme.colorScheme.background
         ) {
             Column(modifier = Modifier.padding(horizontal = 16.dp)) {
                 Text(
@@ -174,13 +180,15 @@ fun MainView(appViewModel: AppViewModel, startProxy: () -> Unit) {
                 )
                 Divider()
                 val keyboardController = LocalSoftwareKeyboardController.current
-                TextField(
+                TextField(label = {
-                    label = {
                     Text(text = "TCP Port")
                 },
                     value = appViewModel.tcpPort.toString(),
                     modifier = Modifier.fillMaxWidth(),
-                    keyboardOptions = KeyboardOptions.Default.copy(keyboardType = KeyboardType.Number, imeAction = ImeAction.Done),
+                    keyboardOptions = KeyboardOptions.Default.copy(
+                        keyboardType = KeyboardType.Number,
+                        imeAction = ImeAction.Done
+                    ),
                     onValueChange = {
                         if (it.isNotEmpty()) {
                             val tcpPort = it.toIntOrNull()
@@ -189,10 +197,7 @@ fun MainView(appViewModel: AppViewModel, startProxy: () -> Unit) {
                             }
                         }
                     },
-                    keyboardActions = KeyboardActions(
+                    keyboardActions = KeyboardActions(onDone = { keyboardController?.hide() }))
-                        onDone = {keyboardController?.hide()}
-                    )
-                )
                 Divider()
                 val connectState = if (appViewModel.hostConnected) "CONNECTED" else "DISCONNECTED"
                 Text(

rust/CHANGELOG.md

@@ -1,6 +1,9 @@
-# Next
+# 0.2.0
 
 - Code-gen company ID table
+- Unstable support for extended advertisements
+- CLI tools for downloading Realtek firmware
+- PDL-generated types for HCI commands
 
 # 0.1.0
 

rust/Cargo.lock

@@ -182,7 +182,7 @@ dependencies = [
 
 [[package]]
 name = "bumble"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "bytes",
@@ -1073,9 +1073,9 @@ checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
 [[package]]
 name = "openssl"
-version = "0.10.57"
+version = "0.10.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bac25ee399abb46215765b1cb35bc0212377e58a061560d8b29b024fd0430e7c"
+checksum = "79a4c6c3a2b158f7f8f2a2fc5a969fa3a068df6fc9dbb4a43845436e3af7c800"
 dependencies = [
  "bitflags 2.4.0",
  "cfg-if",
@@ -1105,9 +1105,9 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.92"
+version = "0.9.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db7e971c2c2bba161b2d2fdf37080177eff520b3bc044787c7f1f5f9e78d869b"
+checksum = "3812c071ba60da8b5677cc12bcb1d42989a65553772897a7e0355545a819838f"
 dependencies = [
  "cc",
  "libc",

rust/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "bumble"
 description = "Rust API for the Bumble Bluetooth stack"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2021"
 license = "Apache-2.0"
 homepage = "https://google.github.io/bumble/index.html"
@@ -10,7 +10,7 @@ documentation = "https://docs.rs/crate/bumble"
 authors = ["Marshall Pierce <marshallpierce@google.com>"]
 keywords = ["bluetooth", "ble"]
 categories = ["api-bindings", "network-programming"]
-rust-version = "1.70.0"
+rust-version = "1.76.0"
 
 # https://github.com/frewsxcv/cargo-all-features#options
 [package.metadata.cargo-all-features]

rust/README.md

@@ -37,6 +37,11 @@ PYTHONPATH=..:[virtualenv site-packages] \
     cargo run --features bumble-tools --bin bumble -- --help
 ```
 
+Notable subcommands:
+
+- `firmware realtek download`: download Realtek firmware for various chipsets so that it can be automatically loaded when needed
+- `usb probe`: show USB devices, highlighting the ones usable for Bluetooth
+
 # Development
 
 Run the tests:

rust/src/wrapper/controller.rs

@@ -35,7 +35,7 @@ impl Controller {
     /// module specifies the defaults. Must be called from a thread with a Python event loop, which
     /// should be true on `tokio::main` and `async_std::main`.
     ///
-    /// For more info, see https://awestlake87.github.io/pyo3-asyncio/master/doc/pyo3_asyncio/#event-loop-references-and-contextvars.
+    /// For more info, see <https://awestlake87.github.io/pyo3-asyncio/master/doc/pyo3_asyncio/#event-loop-references-and-contextvars>.
     pub async fn new(
         name: &str,
         host_source: Option<TransportSource>,

rust/src/wrapper/hci.rs

@@ -149,7 +149,7 @@ impl ToPyObject for Address {
 
 /// An error meaning that the u64 value did not represent a valid BT address.
 #[derive(Debug)]
-pub struct InvalidAddress(u64);
+pub struct InvalidAddress(#[allow(unused)] u64);
 
 impl TryInto<packets::Address> for Address {
     type Error = ConversionError<InvalidAddress>;

rust/src/wrapper/l2cap.rs

@@ -71,7 +71,7 @@ impl LeConnectionOrientedChannel {
     /// Must be called from a thread with a Python event loop, which should be true on
     /// `tokio::main` and `async_std::main`.
     ///
-    /// For more info, see https://awestlake87.github.io/pyo3-asyncio/master/doc/pyo3_asyncio/#event-loop-references-and-contextvars.
+    /// For more info, see <https://awestlake87.github.io/pyo3-asyncio/master/doc/pyo3_asyncio/#event-loop-references-and-contextvars>.
     pub async fn disconnect(&mut self) -> PyResult<()> {
         Python::with_gil(|py| {
             self.0

setup.cfg

@@ -52,12 +52,14 @@ install_requires =
     pyserial-asyncio >= 0.5; platform_system!='Emscripten'
     pyserial >= 3.5; platform_system!='Emscripten'
     pyusb >= 1.2; platform_system!='Emscripten'
-    websockets >= 8.1; platform_system!='Emscripten'
+    websockets >= 12.0; platform_system!='Emscripten'
 
 [options.entry_points]
 console_scripts =
+    bumble-ble-rpa-tool = bumble.apps.ble_rpa_tool:main
     bumble-console = bumble.apps.console:main
     bumble-controller-info = bumble.apps.controller_info:main
+    bumble-controller-loopback = bumble.apps.controller_loopback:main
     bumble-gatt-dump = bumble.apps.gatt_dump:main
     bumble-hci-bridge = bumble.apps.hci_bridge:main
     bumble-l2cap-bridge = bumble.apps.l2cap_bridge:main
@@ -80,15 +82,15 @@ console_scripts =
 build =
     build >= 0.7
 test =
-    pytest >= 6.2
+    pytest >= 8.0
-    pytest-asyncio >= 0.17
+    pytest-asyncio == 0.21.1
     pytest-html >= 3.2.0
     coverage >= 6.4
 development =
     black == 22.10
     grpcio-tools >= 1.57.0
     invoke >= 1.7.3
-    mypy == 1.5.0
+    mypy == 1.8.0
     nox >= 2022
     pylint == 2.15.8
     pyyaml >= 6.0
@@ -96,8 +98,8 @@ development =
     types-invoke >= 1.7.3
     types-protobuf >= 4.21.0
 avatar =
-    pandora-avatar == 0.0.5
+    pandora-avatar == 0.0.8
-    rootcanal == 1.3.0 ; python_version>='3.10'
+    rootcanal == 1.9.0 ; python_version>='3.10'
 documentation =
     mkdocs >= 1.4.0
     mkdocs-material >= 8.5.6

tests/avrcp_test.py

@@ -0,0 +1,246 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import asyncio
+import struct
+
+import pytest
+
+from bumble import core
+from bumble import device
+from bumble import host
+from bumble import controller
+from bumble import link
+from bumble import avc
+from bumble import avrcp
+from bumble import avctp
+from bumble.transport import common
+
+
+# -----------------------------------------------------------------------------
+class TwoDevices:
+    def __init__(self):
+        self.connections = [None, None]
+
+        addresses = ['F0:F1:F2:F3:F4:F5', 'F5:F4:F3:F2:F1:F0']
+        self.link = link.LocalLink()
+        self.controllers = [
+            controller.Controller('C1', link=self.link, public_address=addresses[0]),
+            controller.Controller('C2', link=self.link, public_address=addresses[1]),
+        ]
+        self.devices = [
+            device.Device(
+                address=addresses[0],
+                host=host.Host(
+                    self.controllers[0], common.AsyncPipeSink(self.controllers[0])
+                ),
+            ),
+            device.Device(
+                address=addresses[1],
+                host=host.Host(
+                    self.controllers[1], common.AsyncPipeSink(self.controllers[1])
+                ),
+            ),
+        ]
+        self.devices[0].classic_enabled = True
+        self.devices[1].classic_enabled = True
+        self.connections = [None, None]
+        self.protocols = [None, None]
+
+    def on_connection(self, which, connection):
+        self.connections[which] = connection
+
+    async def setup_connections(self):
+        await self.devices[0].power_on()
+        await self.devices[1].power_on()
+
+        self.connections = await asyncio.gather(
+            self.devices[0].connect(
+                self.devices[1].public_address, core.BT_BR_EDR_TRANSPORT
+            ),
+            self.devices[1].accept(self.devices[0].public_address),
+        )
+
+        self.protocols = [avrcp.Protocol(), avrcp.Protocol()]
+        self.protocols[0].listen(self.devices[1])
+        await self.protocols[1].connect(self.connections[0])
+
+
+# -----------------------------------------------------------------------------
+def test_frame_parser():
+    with pytest.raises(ValueError) as error:
+        avc.Frame.from_bytes(bytes.fromhex("11480000"))
+
+    x = bytes.fromhex("014D0208")
+    frame = avc.Frame.from_bytes(x)
+    assert frame.subunit_type == avc.Frame.SubunitType.PANEL
+    assert frame.subunit_id == 7
+    assert frame.opcode == 8
+
+    x = bytes.fromhex("014DFF0108")
+    frame = avc.Frame.from_bytes(x)
+    assert frame.subunit_type == avc.Frame.SubunitType.PANEL
+    assert frame.subunit_id == 260
+    assert frame.opcode == 8
+
+    x = bytes.fromhex("0148000019581000000103")
+
+    frame = avc.Frame.from_bytes(x)
+
+    assert isinstance(frame, avc.CommandFrame)
+    assert frame.ctype == avc.CommandFrame.CommandType.STATUS
+    assert frame.subunit_type == avc.Frame.SubunitType.PANEL
+    assert frame.subunit_id == 0
+    assert frame.opcode == 0
+
+
+# -----------------------------------------------------------------------------
+def test_vendor_dependent_command():
+    x = bytes.fromhex("0148000019581000000103")
+    frame = avc.Frame.from_bytes(x)
+    assert isinstance(frame, avc.VendorDependentCommandFrame)
+    assert frame.company_id == 0x1958
+    assert frame.vendor_dependent_data == bytes.fromhex("1000000103")
+
+    frame = avc.VendorDependentCommandFrame(
+        avc.CommandFrame.CommandType.STATUS,
+        avc.Frame.SubunitType.PANEL,
+        0,
+        0x1958,
+        bytes.fromhex("1000000103"),
+    )
+    assert bytes(frame) == x
+
+
+# -----------------------------------------------------------------------------
+def test_avctp_message_assembler():
+    received_message = []
+
+    def on_message(transaction_label, is_response, ipid, pid, payload):
+        received_message.append((transaction_label, is_response, ipid, pid, payload))
+
+    assembler = avctp.MessageAssembler(on_message)
+
+    payload = bytes.fromhex("01")
+    assembler.on_pdu(bytes([1 << 4 | 0b00 << 2 | 1 << 1 | 0, 0x11, 0x22]) + payload)
+    assert received_message
+    assert received_message[0] == (1, False, False, 0x1122, payload)
+
+    received_message = []
+    payload = bytes.fromhex("010203")
+    assembler.on_pdu(bytes([1 << 4 | 0b01 << 2 | 1 << 1 | 0, 0x11, 0x22]) + payload)
+    assert len(received_message) == 0
+    assembler.on_pdu(bytes([1 << 4 | 0b00 << 2 | 1 << 1 | 0, 0x11, 0x22]) + payload)
+    assert received_message
+    assert received_message[0] == (1, False, False, 0x1122, payload)
+
+    received_message = []
+    payload = bytes.fromhex("010203")
+    assembler.on_pdu(
+        bytes([1 << 4 | 0b01 << 2 | 1 << 1 | 0, 3, 0x11, 0x22]) + payload[0:1]
+    )
+    assembler.on_pdu(
+        bytes([1 << 4 | 0b10 << 2 | 1 << 1 | 0, 0x11, 0x22]) + payload[1:2]
+    )
+    assembler.on_pdu(
+        bytes([1 << 4 | 0b11 << 2 | 1 << 1 | 0, 0x11, 0x22]) + payload[2:3]
+    )
+    assert received_message
+    assert received_message[0] == (1, False, False, 0x1122, payload)
+
+    # received_message = []
+    # parameter = bytes.fromhex("010203")
+    # assembler.on_pdu(struct.pack(">BBH", 0x10, 0b11, len(parameter)) + parameter)
+    # assert len(received_message) == 0
+
+
+# -----------------------------------------------------------------------------
+def test_avrcp_pdu_assembler():
+    received_pdus = []
+
+    def on_pdu(pdu_id, parameter):
+        received_pdus.append((pdu_id, parameter))
+
+    assembler = avrcp.PduAssembler(on_pdu)
+
+    parameter = bytes.fromhex("01")
+    assembler.on_pdu(struct.pack(">BBH", 0x10, 0b00, len(parameter)) + parameter)
+    assert received_pdus
+    assert received_pdus[0] == (0x10, parameter)
+
+    received_pdus = []
+    parameter = bytes.fromhex("010203")
+    assembler.on_pdu(struct.pack(">BBH", 0x10, 0b01, len(parameter)) + parameter)
+    assert len(received_pdus) == 0
+    assembler.on_pdu(struct.pack(">BBH", 0x10, 0b00, len(parameter)) + parameter)
+    assert received_pdus
+    assert received_pdus[0] == (0x10, parameter)
+
+    received_pdus = []
+    parameter = bytes.fromhex("010203")
+    assembler.on_pdu(struct.pack(">BBH", 0x10, 0b01, 1) + parameter[0:1])
+    assembler.on_pdu(struct.pack(">BBH", 0x10, 0b10, 1) + parameter[1:2])
+    assembler.on_pdu(struct.pack(">BBH", 0x10, 0b11, 1) + parameter[2:3])
+    assert received_pdus
+    assert received_pdus[0] == (0x10, parameter)
+
+    received_pdus = []
+    parameter = bytes.fromhex("010203")
+    assembler.on_pdu(struct.pack(">BBH", 0x10, 0b11, len(parameter)) + parameter)
+    assert len(received_pdus) == 0
+
+
+def test_passthrough_commands():
+    play_pressed = avc.PassThroughCommandFrame(
+        avc.CommandFrame.CommandType.CONTROL,
+        avc.CommandFrame.SubunitType.PANEL,
+        0,
+        avc.PassThroughCommandFrame.StateFlag.PRESSED,
+        avc.PassThroughCommandFrame.OperationId.PLAY,
+        b'',
+    )
+
+    play_pressed_bytes = bytes(play_pressed)
+    parsed = avc.Frame.from_bytes(play_pressed_bytes)
+    assert isinstance(parsed, avc.PassThroughCommandFrame)
+    assert parsed.operation_id == avc.PassThroughCommandFrame.OperationId.PLAY
+    assert bytes(parsed) == play_pressed_bytes
+
+
+# -----------------------------------------------------------------------------
+@pytest.mark.asyncio
+async def test_get_supported_events():
+    two_devices = TwoDevices()
+    await two_devices.setup_connections()
+
+    supported_events = await two_devices.protocols[0].get_supported_events()
+    assert supported_events == []
+
+    delegate1 = avrcp.Delegate([avrcp.EventId.VOLUME_CHANGED])
+    two_devices.protocols[0].delegate = delegate1
+    supported_events = await two_devices.protocols[1].get_supported_events()
+    assert supported_events == [avrcp.EventId.VOLUME_CHANGED]
+
+
+# -----------------------------------------------------------------------------
+if __name__ == '__main__':
+    test_frame_parser()
+    test_vendor_dependent_command()
+    test_avctp_message_assembler()
+    test_avrcp_pdu_assembler()
+    test_passthrough_commands()
+    test_get_supported_events()