compatibility with recent host ACL property changes

apps: Add a controller loopback throughput test app

.gitignore

@@ -10,3 +10,5 @@ __pycache__
 bumble/_version.py
 .vscode/launch.json
 /.idea
+venv/
+.venv/

.vscode/settings.json

@@ -22,6 +22,7 @@
         "cmac",
         "CONNECTIONLESS",
         "csip",
+        "csis",
         "csrcs",
         "CVSD",
         "datagram",

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

@@ -32,10 +32,14 @@ from bumble.hci import (
     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,
@@ -59,7 +63,7 @@ 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 +84,7 @@ 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):
@@ -136,6 +140,31 @@ async def get_le_info(host):
         print('  ', name_or_number(HCI_LE_SUPPORTED_FEATURES_NAMES, feature))
 
 
+# -----------------------------------------------------------------------------
+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(transport):
     print('<<< connecting to HCI...')
@@ -168,6 +197,9 @@ 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'))

apps/controller_loopback.py

@@ -0,0 +1,200 @@
+# 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.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=int,
+    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

@@ -52,11 +52,13 @@ 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):
-        self.done.set_result(None)
+        if not self.linger:
+            self.done.set_result(None)
 
     async def wait_until_terminated(self):
         return await self.done
@@ -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(

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/controller.py

@@ -134,12 +134,14 @@ 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
@@ -914,6 +916,19 @@ class Controller:
         '''
         return bytes([HCI_SUCCESS]) + self.lmp_features
 
+    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):
         '''
         See Bluetooth spec Vol 4, Part E - 7.4.6 Read BD_ADDR Command
@@ -1263,3 +1278,15 @@ class Controller:
         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_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/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/device.py

@@ -437,6 +437,38 @@ class AdvertisingType(IntEnum):
         )
 
 
+# -----------------------------------------------------------------------------
+@dataclass
+class LegacyAdvertiser:
+    device: Device
+    advertising_type: AdvertisingType
+    own_address_type: OwnAddressType
+    auto_restart: bool
+    advertising_data: Optional[bytes]
+    scan_response_data: Optional[bytes]
+
+    async def stop(self) -> None:
+        await self.device.stop_legacy_advertising()
+
+
+# -----------------------------------------------------------------------------
+@dataclass
+class ExtendedAdvertiser(CompositeEventEmitter):
+    device: Device
+    handle: int
+    advertising_properties: HCI_LE_Set_Extended_Advertising_Parameters_Command.AdvertisingProperties
+    own_address_type: OwnAddressType
+    auto_restart: bool
+    advertising_data: Optional[bytes]
+    scan_response_data: Optional[bytes]
+
+    def __post_init__(self) -> None:
+        super().__init__()
+
+    async def stop(self) -> None:
+        await self.device.stop_extended_advertising(self.handle)
+
+
 # -----------------------------------------------------------------------------
 class LePhyOptions:
     # Coded PHY preference
@@ -658,6 +690,9 @@ class Connection(CompositeEventEmitter):
     gatt_client: gatt_client.Client
     pairing_peer_io_capability: Optional[int]
     pairing_peer_authentication_requirements: Optional[int]
+    advertiser_after_disconnection: Union[
+        LegacyAdvertiser, ExtendedAdvertiser, None
+    ] = None
 
     @composite_listener
     class Listener:
@@ -1063,7 +1098,8 @@ class Device(CompositeEventEmitter):
     ]
     advertisement_accumulators: Dict[Address, AdvertisementDataAccumulator]
     config: DeviceConfiguration
-    extended_advertising_handles: Set[int]
+    legacy_advertiser: Optional[LegacyAdvertiser]
+    extended_advertisers: Dict[int, ExtendedAdvertiser]
     sco_links: Dict[int, ScoLink]
     cis_links: Dict[int, CisLink]
     _pending_cis: Dict[int, Tuple[int, int]]
@@ -1141,10 +1177,7 @@ class Device(CompositeEventEmitter):
 
         self._host = None
         self.powered_on = False
-        self.advertising = False
-        self.advertising_type = None
         self.auto_restart_inquiry = True
-        self.auto_restart_advertising = False
         self.command_timeout = 10  # seconds
         self.gatt_server = gatt_server.Server(self)
         self.sdp_server = sdp.Server(self)
@@ -1168,10 +1201,10 @@ class Device(CompositeEventEmitter):
         self.classic_pending_accepts = {
             Address.ANY: []
         }  # Futures, by BD address OR [Futures] for Address.ANY
-        self.extended_advertising_handles = set()
+        self.legacy_advertiser = None
+        self.extended_advertisers = {}
 
         # Own address type cache
-        self.advertising_own_address_type = None
         self.connect_own_address_type = None
 
         # Use the initial config or a default
@@ -1579,6 +1612,7 @@ class Device(CompositeEventEmitter):
 
         return self.host.supports_le_feature(feature_map[phy])
 
+    @deprecated("Please use start_legacy_advertising.")
     async def start_advertising(
         self,
         advertising_type: AdvertisingType = AdvertisingType.UNDIRECTED_CONNECTABLE_SCANNABLE,
@@ -1586,15 +1620,49 @@ class Device(CompositeEventEmitter):
         own_address_type: int = OwnAddressType.RANDOM,
         auto_restart: bool = False,
     ) -> None:
+        await self.start_legacy_advertising(
+            advertising_type=advertising_type,
+            target=target,
+            own_address_type=OwnAddressType(own_address_type),
+            auto_restart=auto_restart,
+        )
+
+    async def start_legacy_advertising(
+        self,
+        advertising_type: AdvertisingType = AdvertisingType.UNDIRECTED_CONNECTABLE_SCANNABLE,
+        target: Optional[Address] = None,
+        own_address_type: OwnAddressType = OwnAddressType.RANDOM,
+        auto_restart: bool = False,
+        advertising_data: Optional[bytes] = None,
+        scan_response_data: Optional[bytes] = None,
+    ) -> LegacyAdvertiser:
+        """Starts an legacy advertisement.
+
+        Args:
+          advertising_type: Advertising type passed to HCI_LE_Set_Advertising_Parameters_Command.
+          target: Directed advertising target. Directed type should be set in advertising_type arg.
+          own_address_type: own address type to use in the advertising.
+          auto_restart: whether the advertisement will be restarted after disconnection.
+          scan_response_data: raw scan response.
+          advertising_data: raw advertising data.
+
+        Returns:
+          LegacyAdvertiser object containing the metadata of advertisement.
+        """
+        if self.extended_advertisers:
+            logger.warning(
+                'Trying to start Legacy and Extended Advertising at the same time!'
+            )
+
         # If we're advertising, stop first
-        if self.advertising:
+        if self.legacy_advertiser:
             await self.stop_advertising()
 
         # Set/update the advertising data if the advertising type allows it
         if advertising_type.has_data:
             await self.send_command(
                 HCI_LE_Set_Advertising_Data_Command(
-                    advertising_data=self.advertising_data
+                    advertising_data=advertising_data or self.advertising_data or b''
                 ),
                 check_result=True,
             )
@@ -1603,7 +1671,9 @@ class Device(CompositeEventEmitter):
         if advertising_type.is_scannable:
             await self.send_command(
                 HCI_LE_Set_Scan_Response_Data_Command(
-                    scan_response_data=self.scan_response_data
+                    scan_response_data=scan_response_data
+                    or self.scan_response_data
+                    or b''
                 ),
                 check_result=True,
             )
@@ -1640,45 +1710,57 @@ class Device(CompositeEventEmitter):
             check_result=True,
         )
 
-        self.advertising_type = advertising_type
+        self.legacy_advertiser = LegacyAdvertiser(
-        self.advertising_own_address_type = own_address_type
+            device=self,
-        self.advertising = True
+            advertising_type=advertising_type,
-        self.auto_restart_advertising = auto_restart
+            own_address_type=own_address_type,
+            auto_restart=auto_restart,
+            advertising_data=advertising_data,
+            scan_response_data=scan_response_data,
+        )
+        return self.legacy_advertiser
 
+    @deprecated("Please use stop_legacy_advertising.")
     async def stop_advertising(self) -> None:
+        await self.stop_legacy_advertising()
+
+    async def stop_legacy_advertising(self) -> None:
         # Disable advertising
-        if self.advertising:
+        if self.legacy_advertiser:
             await self.send_command(
                 HCI_LE_Set_Advertising_Enable_Command(advertising_enable=0),
                 check_result=True,
             )
 
-            self.advertising_type = None
+            self.legacy_advertiser = None
-            self.advertising_own_address_type = None
-            self.advertising = False
-            self.auto_restart_advertising = False
 
     @experimental('Extended Advertising is still experimental - Might be changed soon.')
     async def start_extended_advertising(
         self,
         advertising_properties: HCI_LE_Set_Extended_Advertising_Parameters_Command.AdvertisingProperties = HCI_LE_Set_Extended_Advertising_Parameters_Command.AdvertisingProperties.CONNECTABLE_ADVERTISING,
         target: Address = Address.ANY,
-        own_address_type: int = OwnAddressType.RANDOM,
+        own_address_type: OwnAddressType = OwnAddressType.RANDOM,
-        scan_response: Optional[bytes] = None,
+        auto_restart: bool = True,
         advertising_data: Optional[bytes] = None,
-    ) -> int:
+        scan_response_data: Optional[bytes] = None,
+    ) -> ExtendedAdvertiser:
         """Starts an extended advertising set.
 
         Args:
           advertising_properties: Properties to pass in HCI_LE_Set_Extended_Advertising_Parameters_Command
           target: Directed advertising target. Directed property should be set in advertising_properties arg.
           own_address_type: own address type to use in the advertising.
-          scan_response: raw scan response. When a non-none value is set, HCI_LE_Set_Extended_Scan_Response_Data_Command will be sent.
+          auto_restart: whether the advertisement will be restarted after disconnection.
           advertising_data: raw advertising data. When a non-none value is set, HCI_LE_Set_Advertising_Set_Random_Address_Command will be sent.
+          scan_response_data: raw scan response. When a non-none value is set, HCI_LE_Set_Extended_Scan_Response_Data_Command will be sent.
 
         Returns:
-          Handle of the new advertising set.
+          ExtendedAdvertiser object containing the metadata of advertisement.
         """
+        if self.legacy_advertiser:
+            logger.warning(
+                'Trying to start Legacy and Extended Advertising at the same time!'
+            )
 
         adv_handle = -1
         # Find a free handle
@@ -1686,7 +1768,7 @@ class Device(CompositeEventEmitter):
             DEVICE_MIN_EXTENDED_ADVERTISING_SET_HANDLE,
             DEVICE_MAX_EXTENDED_ADVERTISING_SET_HANDLE + 1,
         ):
-            if i not in self.extended_advertising_handles:
+            if i not in self.extended_advertisers:
                 adv_handle = i
                 break
 
@@ -1733,13 +1815,13 @@ class Device(CompositeEventEmitter):
                 )
 
             # Set the scan response if present
-            if scan_response is not None:
+            if scan_response_data is not None:
                 await self.send_command(
                     HCI_LE_Set_Extended_Scan_Response_Data_Command(
                         advertising_handle=adv_handle,
                         operation=HCI_LE_Set_Extended_Advertising_Data_Command.Operation.COMPLETE_DATA,
                         fragment_preference=0x01,  # Should not fragment
-                        scan_response_data=scan_response,
+                        scan_response_data=scan_response_data,
                     ),
                     check_result=True,
                 )
@@ -1774,8 +1856,16 @@ class Device(CompositeEventEmitter):
             )
             raise error
 
-        self.extended_advertising_handles.add(adv_handle)
+        advertiser = self.extended_advertisers[adv_handle] = ExtendedAdvertiser(
-        return adv_handle
+            device=self,
+            handle=adv_handle,
+            advertising_properties=advertising_properties,
+            own_address_type=own_address_type,
+            auto_restart=auto_restart,
+            advertising_data=advertising_data,
+            scan_response_data=scan_response_data,
+        )
+        return advertiser
 
     @experimental('Extended Advertising is still experimental - Might be changed soon.')
     async def stop_extended_advertising(self, adv_handle: int) -> None:
@@ -1799,11 +1889,11 @@ class Device(CompositeEventEmitter):
             HCI_LE_Remove_Advertising_Set_Command(advertising_handle=adv_handle),
             check_result=True,
         )
-        self.extended_advertising_handles.remove(adv_handle)
+        del self.extended_advertisers[adv_handle]
 
     @property
     def is_advertising(self):
-        return self.advertising
+        return self.legacy_advertiser or self.extended_advertisers
 
     async def start_scanning(
         self,
@@ -3144,13 +3234,18 @@ class Device(CompositeEventEmitter):
             # Guess which own address type is used for this connection.
             # This logic is somewhat correct but may need to be improved
             # when multiple advertising are run simultaneously.
+            advertiser = None
             if self.connect_own_address_type is not None:
                 own_address_type = self.connect_own_address_type
+            elif self.legacy_advertiser:
+                own_address_type = self.legacy_advertiser.own_address_type
+                # Store advertiser for restarting - it's only required for legacy, since
+                # extended advertisement produces HCI_Advertising_Set_Terminated.
+                if self.legacy_advertiser.auto_restart:
+                    advertiser = self.legacy_advertiser
             else:
-                own_address_type = self.advertising_own_address_type
+                # For extended advertisement, determining own address type later.
-
+                own_address_type = OwnAddressType.RANDOM
-            # We are no longer advertising
-            self.advertising = False
 
             if own_address_type in (
                 OwnAddressType.PUBLIC,
@@ -3172,6 +3267,7 @@ class Device(CompositeEventEmitter):
                 connection_parameters,
                 ConnectionPHY(HCI_LE_1M_PHY, HCI_LE_1M_PHY),
             )
+            connection.advertiser_after_disconnection = advertiser
             self.connections[connection_handle] = connection
 
             # If supported, read which PHY we're connected with before
@@ -3203,10 +3299,10 @@ class Device(CompositeEventEmitter):
         # For directed advertising, this means a timeout
         if (
             transport == BT_LE_TRANSPORT
-            and self.advertising
+            and self.legacy_advertiser
-            and self.advertising_type.is_directed
+            and self.legacy_advertiser.advertising_type.is_directed
         ):
-            self.advertising = False
+            self.legacy_advertiser = None
 
         # Notify listeners
         error = core.ConnectionError(
@@ -3268,16 +3364,30 @@ class Device(CompositeEventEmitter):
             self.gatt_server.on_disconnection(connection)
 
             # Restart advertising if auto-restart is enabled
-            if self.auto_restart_advertising:
+            if advertiser := connection.advertiser_after_disconnection:
                 logger.debug('restarting advertising')
-                self.abort_on(
+                if isinstance(advertiser, LegacyAdvertiser):
-                    'flush',
+                    self.abort_on(
-                    self.start_advertising(
+                        'flush',
-                        advertising_type=self.advertising_type,  # type: ignore[arg-type]
+                        self.start_legacy_advertising(
-                        own_address_type=self.advertising_own_address_type,  # type: ignore[arg-type]
+                            advertising_type=advertiser.advertising_type,
-                        auto_restart=True,
+                            own_address_type=advertiser.own_address_type,
-                    ),
+                            advertising_data=advertiser.advertising_data,
-                )
+                            scan_response_data=advertiser.scan_response_data,
+                            auto_restart=True,
+                        ),
+                    )
+                elif isinstance(advertiser, ExtendedAdvertiser):
+                    self.abort_on(
+                        'flush',
+                        self.start_extended_advertising(
+                            advertising_properties=advertiser.advertising_properties,
+                            own_address_type=advertiser.own_address_type,
+                            advertising_data=advertiser.advertising_data,
+                            scan_response_data=advertiser.scan_response_data,
+                            auto_restart=True,
+                        ),
+                    )
         elif sco_link := self.sco_links.pop(connection_handle, None):
             sco_link.emit('disconnection', reason)
         elif cis_link := self.cis_links.pop(connection_handle, None):
@@ -3600,6 +3710,30 @@ class Device(CompositeEventEmitter):
         if sco_link := self.sco_links.get(sco_handle, None):
             sco_link.emit('pdu', packet)
 
+    # [LE only]
+    @host_event_handler
+    @experimental('Only for testing')
+    def on_advertising_set_termination(
+        self,
+        status: int,
+        advertising_handle: int,
+        connection_handle: int,
+    ) -> None:
+        if status == HCI_SUCCESS:
+            connection = self.lookup_connection(connection_handle)
+        if advertiser := self.extended_advertisers.pop(advertising_handle, None):
+            if connection:
+                if advertiser.auto_restart:
+                    connection.advertiser_after_disconnection = advertiser
+                if advertiser.own_address_type in (
+                    OwnAddressType.PUBLIC,
+                    OwnAddressType.RESOLVABLE_OR_PUBLIC,
+                ):
+                    connection.self_address = self.public_address
+                else:
+                    connection.self_address = self.random_address
+            advertiser.emit('termination', status)
+
     # [LE only]
     @host_event_handler
     @with_connection_from_handle

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
+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}
-        logger.debug("Instantiated RTK driver")
+    probe_list: Iterable[str]
-        return driver
+    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/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_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
@@ -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/hci.py

@@ -21,9 +21,11 @@ import dataclasses
 import enum
 import functools
 import logging
+import secrets
 import struct
 from typing import Any, Dict, Callable, Optional, Type, Union, List
 
+from bumble import crypto
 from .colors import color
 from .core import (
     BT_BR_EDR_TRANSPORT,
@@ -728,6 +730,19 @@ HCI_LE_PHY_TYPE_TO_BIT = {
     HCI_LE_CODED_PHY: HCI_LE_CODED_PHY_BIT
 }
 
+
+class Phy(enum.IntEnum):
+    LE_1M    = 0x01
+    LE_2M    = 0x02
+    LE_CODED = 0x03
+
+
+class PhyBit(enum.IntFlag):
+    LE_1M    = 0b00000001
+    LE_2M    = 0b00000010
+    LE_CODED = 0b00000100
+
+
 # Connection Parameters
 HCI_CONNECTION_INTERVAL_MS_PER_UNIT = 1.25
 HCI_CONNECTION_LATENCY_MS_PER_UNIT  = 1.25
@@ -1868,6 +1883,43 @@ class Address:
         address_type = data[offset - 1]
         return Address.parse_address_with_type(data, offset, address_type)
 
+    @classmethod
+    def generate_static_address(cls) -> Address:
+        '''Generates Random Static Address, with the 2 most significant bits of 0b11.
+
+        See Bluetooth spec, Vol 6, Part B - Table 1.2.
+        '''
+        address_bytes = secrets.token_bytes(6)
+        address_bytes = address_bytes[:5] + bytes([address_bytes[5] | 0b11000000])
+        return Address(
+            address=address_bytes, address_type=Address.RANDOM_DEVICE_ADDRESS
+        )
+
+    @classmethod
+    def generate_private_address(cls, irk: bytes = b'') -> Address:
+        '''Generates Random Private MAC Address.
+
+        If IRK is present, a Resolvable Private Address, with the 2 most significant
+        bits of 0b01 will be generated. Otherwise, a Non-resolvable Private Address,
+        with the 2 most significant bits of 0b00 will be generated.
+
+        See Bluetooth spec, Vol 6, Part B - Table 1.2.
+
+        Args:
+            irk: Local Identity Resolving Key(IRK), in little-endian. If not set, a
+            non-resolvable address will be generated.
+        '''
+        if irk:
+            prand = crypto.generate_prand()
+            address_bytes = crypto.ah(irk, prand) + prand
+        else:
+            address_bytes = secrets.token_bytes(6)
+            address_bytes = address_bytes[:5] + bytes([address_bytes[5] & 0b00111111])
+
+        return Address(
+            address=address_bytes, address_type=Address.RANDOM_DEVICE_ADDRESS
+        )
+
     def __init__(
         self, address: Union[bytes, str], address_type: int = RANDOM_DEVICE_ADDRESS
     ):
@@ -1963,25 +2015,26 @@ Address.ANY_RANDOM = Address(b"\x00\x00\x00\x00\x00\x00", Address.RANDOM_DEVICE_
 
 
 # -----------------------------------------------------------------------------
-class OwnAddressType:
+class OwnAddressType(enum.IntEnum):
     PUBLIC = 0
     RANDOM = 1
     RESOLVABLE_OR_PUBLIC = 2
     RESOLVABLE_OR_RANDOM = 3
 
-    TYPE_NAMES = {
+    @classmethod
-        PUBLIC: 'PUBLIC',
+    def type_spec(cls):
-        RANDOM: 'RANDOM',
+        return {'size': 1, 'mapper': lambda x: OwnAddressType(x).name}
-        RESOLVABLE_OR_PUBLIC: 'RESOLVABLE_OR_PUBLIC',
-        RESOLVABLE_OR_RANDOM: 'RESOLVABLE_OR_RANDOM',
-    }
 
-    @staticmethod
-    def type_name(type_id):
-        return name_or_number(OwnAddressType.TYPE_NAMES, type_id)
 
-    # pylint: disable-next=unnecessary-lambda
+# -----------------------------------------------------------------------------
-    TYPE_SPEC = {'size': 1, 'mapper': lambda x: OwnAddressType.type_name(x)}
+class LoopbackMode(enum.IntEnum):
+    DISABLED = 0
+    LOCAL = 1
+    REMOTE = 2
+
+    @classmethod
+    def type_spec(cls):
+        return {'size': 1, 'mapper': lambda x: LoopbackMode(x).name}
 
 
 # -----------------------------------------------------------------------------
@@ -3310,6 +3363,27 @@ class HCI_Read_Encryption_Key_Size_Command(HCI_Command):
     '''
 
 
+# -----------------------------------------------------------------------------
+@HCI_Command.command(
+    return_parameters_fields=[
+        ('status', STATUS_SPEC),
+        ('loopback_mode', LoopbackMode.type_spec()),
+    ],
+)
+class HCI_Read_Loopback_Mode_Command(HCI_Command):
+    '''
+    See Bluetooth spec @ 7.6.1 Read Loopback Mode Command
+    '''
+
+
+# -----------------------------------------------------------------------------
+@HCI_Command.command([('loopback_mode', 1)])
+class HCI_Write_Loopback_Mode_Command(HCI_Command):
+    '''
+    See Bluetooth spec @ 7.6.2 Write Loopback Mode Command
+    '''
+
+
 # -----------------------------------------------------------------------------
 @HCI_Command.command([('le_event_mask', 8)])
 class HCI_LE_Set_Event_Mask_Command(HCI_Command):
@@ -3374,7 +3448,7 @@ class HCI_LE_Set_Random_Address_Command(HCI_Command):
                 ),
             },
         ),
-        ('own_address_type', OwnAddressType.TYPE_SPEC),
+        ('own_address_type', OwnAddressType.type_spec()),
         ('peer_address_type', Address.ADDRESS_TYPE_SPEC),
         ('peer_address', Address.parse_address_preceded_by_type),
         ('advertising_channel_map', 1),
@@ -3467,7 +3541,7 @@ class HCI_LE_Set_Advertising_Enable_Command(HCI_Command):
         ('le_scan_type', 1),
         ('le_scan_interval', 2),
         ('le_scan_window', 2),
-        ('own_address_type', OwnAddressType.TYPE_SPEC),
+        ('own_address_type', OwnAddressType.type_spec()),
         ('scanning_filter_policy', 1),
     ]
 )
@@ -3506,7 +3580,7 @@ class HCI_LE_Set_Scan_Enable_Command(HCI_Command):
         ('initiator_filter_policy', 1),
         ('peer_address_type', Address.ADDRESS_TYPE_SPEC),
         ('peer_address', Address.parse_address_preceded_by_type),
-        ('own_address_type', OwnAddressType.TYPE_SPEC),
+        ('own_address_type', OwnAddressType.type_spec()),
         ('connection_interval_min', 2),
         ('connection_interval_max', 2),
         ('max_latency', 2),
@@ -3913,7 +3987,7 @@ class HCI_LE_Set_Advertising_Set_Random_Address_Command(HCI_Command):
                 ),
             },
         ),
-        ('own_address_type', OwnAddressType.TYPE_SPEC),
+        ('own_address_type', OwnAddressType.type_spec()),
         ('peer_address_type', Address.ADDRESS_TYPE_SPEC),
         ('peer_address', Address.parse_address_preceded_by_type),
         ('advertising_filter_policy', 1),
@@ -4309,7 +4383,7 @@ class HCI_LE_Extended_Create_Connection_Command(HCI_Command):
             ('initiator_filter_policy:', self.initiator_filter_policy),
             (
                 'own_address_type:       ',
-                OwnAddressType.type_name(self.own_address_type),
+                OwnAddressType(self.own_address_type).name,
             ),
             (
                 'peer_address_type:      ',
@@ -4551,6 +4625,10 @@ class HCI_LE_Setup_ISO_Data_Path_Command(HCI_Command):
     See Bluetooth spec @ 7.8.109 LE Setup ISO Data Path command
     '''
 
+    class Direction(enum.IntEnum):
+        HOST_TO_CONTROLLER = 0x00
+        CONTROLLER_TO_HOST = 0x01
+
     connection_handle: int
     data_path_direction: int
     data_path_id: int
@@ -5190,6 +5268,21 @@ HCI_LE_Meta_Event.subevent_classes[
 ] = HCI_LE_Extended_Advertising_Report_Event
 
 
+# -----------------------------------------------------------------------------
+@HCI_LE_Meta_Event.event(
+    [
+        ('status', 1),
+        ('advertising_handle', 1),
+        ('connection_handle', 2),
+        ('number_completed_extended_advertising_events', 1),
+    ]
+)
+class HCI_LE_Advertising_Set_Terminated_Event(HCI_LE_Meta_Event):
+    '''
+    See Bluetooth spec @ 7.7.65.18 LE Advertising Set Terminated Event
+    '''
+
+
 # -----------------------------------------------------------------------------
 @HCI_LE_Meta_Event.event([('connection_handle', 2), ('channel_selection_algorithm', 1)])
 class HCI_LE_Channel_Selection_Algorithm_Event(HCI_LE_Meta_Event):

bumble/helpers.py

@@ -37,6 +37,7 @@ from bumble.l2cap import (
     L2CAP_Connection_Response,
 )
 from bumble.hci import (
+    Address,
     HCI_EVENT_PACKET,
     HCI_ACL_DATA_PACKET,
     HCI_DISCONNECTION_COMPLETE_EVENT,
@@ -48,6 +49,7 @@ from bumble.hci import (
 )
 from bumble.rfcomm import RFCOMM_Frame, RFCOMM_PSM
 from bumble.sdp import SDP_PDU, SDP_PSM
+from bumble import crypto
 
 # -----------------------------------------------------------------------------
 # Logging
@@ -232,3 +234,15 @@ 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/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
-        param = pdu[0] & 0x0F
-
-        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('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.l2cap_intr_channel = None
-            self.emit('data', pdu)
+        logger.debug(f'$$$ L2CAP channel close: {l2cap_channel}')
+
+    @abstractmethod
+    def on_ctrl_pdu(self, pdu: bytes) -> None:
+        pass
 
     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)
-        logger.debug(f'>>> HID INTERRUPT SEND DATA, PDU: {hid_message.hex()}')
+        if self.l2cap_intr_channel is not None:
-        self.send_pdu_on_intr(hid_message)
+            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.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/host.py

@@ -21,7 +21,7 @@ import collections
 import logging
 import struct
 
-from typing import Optional, TYPE_CHECKING, Dict, Callable, Awaitable, cast
+from typing import Any, Awaitable, Callable, Deque, Dict, Optional, cast, TYPE_CHECKING
 
 from bumble.colors import color
 from bumble.l2cap import L2CAP_PDU
@@ -91,16 +91,49 @@ logger = logging.getLogger(__name__)
 
 
 # -----------------------------------------------------------------------------
-# Constants
+class AclPacketQueue:
-# -----------------------------------------------------------------------------
+    max_packet_size: int
-# fmt: off
 
-HOST_DEFAULT_HC_LE_ACL_DATA_PACKET_LENGTH = 27
+    def __init__(
-HOST_HC_TOTAL_NUM_LE_ACL_DATA_PACKETS     = 1
+        self,
-HOST_DEFAULT_HC_ACL_DATA_PACKET_LENGTH    = 27
+        max_packet_size: int,
-HOST_HC_TOTAL_NUM_ACL_DATA_PACKETS        = 1
+        max_in_flight: int,
+        send: Callable[[HCI_Packet], None],
+    ) -> None:
+        self.max_packet_size = max_packet_size
+        self.max_in_flight = max_in_flight
+        self.in_flight = 0
+        self.send = send
+        self.packets: Deque[HCI_AclDataPacket] = collections.deque()
 
-# fmt: on
+    def enqueue(self, packet: HCI_AclDataPacket) -> None:
+        self.packets.appendleft(packet)
+        self.check_queue()
+
+        if self.packets:
+            logger.debug(
+                f'{self.in_flight} ACL packets in flight, '
+                f'{len(self.packets)} in queue'
+            )
+
+    def check_queue(self) -> None:
+        while self.packets and self.in_flight < self.max_in_flight:
+            packet = self.packets.pop()
+            self.send(packet)
+            self.in_flight += 1
+
+    def on_packets_completed(self, packet_count: int) -> None:
+        if packet_count > self.in_flight:
+            logger.warning(
+                color(
+                    '!!! {packet_count} completed but only '
+                    f'{self.in_flight} in flight'
+                )
+            )
+            packet_count = self.in_flight
+
+        self.in_flight -= packet_count
+        self.check_queue()
 
 
 # -----------------------------------------------------------------------------
@@ -111,6 +144,13 @@ class Connection:
         self.peer_address = peer_address
         self.assembler = HCI_AclDataPacketAssembler(self.on_acl_pdu)
         self.transport = transport
+        acl_packet_queue: Optional[AclPacketQueue] = (
+            host.le_acl_packet_queue
+            if transport == BT_LE_TRANSPORT
+            else host.acl_packet_queue
+        )
+        assert acl_packet_queue
+        self.acl_packet_queue = acl_packet_queue
 
     def on_hci_acl_data_packet(self, packet: HCI_AclDataPacket) -> None:
         self.assembler.feed_packet(packet)
@@ -123,8 +163,10 @@ class Connection:
 # -----------------------------------------------------------------------------
 class Host(AbortableEventEmitter):
     connections: Dict[int, Connection]
-    acl_packet_queue: collections.deque[HCI_AclDataPacket]
+    acl_packet_queue: Optional[AclPacketQueue] = None
-    hci_sink: TransportSink
+    le_acl_packet_queue: Optional[AclPacketQueue] = None
+    hci_sink: Optional[TransportSink] = None
+    hci_metadata: Dict[str, Any]
     long_term_key_provider: Optional[
         Callable[[int, bytes, int], Awaitable[Optional[bytes]]]
     ]
@@ -137,18 +179,11 @@ class Host(AbortableEventEmitter):
     ) -> None:
         super().__init__()
 
-        self.hci_metadata = None
+        self.hci_metadata = {}
         self.ready = False  # True when we can accept incoming packets
-        self.reset_done = False
         self.connections = {}  # Connections, by connection handle
         self.pending_command = None
         self.pending_response = None
-        self.hc_le_acl_data_packet_length = HOST_DEFAULT_HC_LE_ACL_DATA_PACKET_LENGTH
-        self.hc_total_num_le_acl_data_packets = HOST_HC_TOTAL_NUM_LE_ACL_DATA_PACKETS
-        self.hc_acl_data_packet_length = HOST_DEFAULT_HC_ACL_DATA_PACKET_LENGTH
-        self.hc_total_num_acl_data_packets = HOST_HC_TOTAL_NUM_ACL_DATA_PACKETS
-        self.acl_packet_queue = collections.deque()
-        self.acl_packets_in_flight = 0
         self.local_version = None
         self.local_supported_commands = bytes(64)
         self.local_le_features = 0
@@ -162,10 +197,7 @@ class Host(AbortableEventEmitter):
 
         # Connect to the source and sink if specified
         if controller_source:
-            controller_source.set_packet_sink(self)
+            self.set_packet_source(controller_source)
-            self.hci_metadata = getattr(
-                controller_source, 'metadata', self.hci_metadata
-            )
         if controller_sink:
             self.set_packet_sink(controller_sink)
 
@@ -200,17 +232,21 @@ class Host(AbortableEventEmitter):
             self.ready = False
             await self.flush()
 
-        await self.send_command(HCI_Reset_Command(), check_result=True)
-        self.ready = True
-
         # Instantiate and init a driver for the host if needed.
         # NOTE: we don't keep a reference to the driver here, because we don't
         # currently have a need for the driver later on. But if the driver interface
         # evolves, it may be required, then, to store a reference to the driver in
         # an object property.
+        reset_needed = True
         if driver_factory is not None:
             if driver := await driver_factory(self):
                 await driver.init_controller()
+                reset_needed = False
+
+        # Send a reset command unless a driver has already done so.
+        if reset_needed:
+            await self.send_command(HCI_Reset_Command(), check_result=True)
+            self.ready = True
 
         response = await self.send_command(
             HCI_Read_Local_Supported_Commands_Command(), check_result=True
@@ -253,46 +289,54 @@ class Host(AbortableEventEmitter):
             response = await self.send_command(
                 HCI_Read_Buffer_Size_Command(), check_result=True
             )
-            self.hc_acl_data_packet_length = (
+            hc_acl_data_packet_length = (
                 response.return_parameters.hc_acl_data_packet_length
             )
-            self.hc_total_num_acl_data_packets = (
+            hc_total_num_acl_data_packets = (
                 response.return_parameters.hc_total_num_acl_data_packets
             )
 
             logger.debug(
                 'HCI ACL flow control: '
-                f'hc_acl_data_packet_length={self.hc_acl_data_packet_length},'
+                f'hc_acl_data_packet_length={hc_acl_data_packet_length},'
-                f'hc_total_num_acl_data_packets={self.hc_total_num_acl_data_packets}'
+                f'hc_total_num_acl_data_packets={hc_total_num_acl_data_packets}'
             )
 
+            self.acl_packet_queue = AclPacketQueue(
+                max_packet_size=hc_acl_data_packet_length,
+                max_in_flight=hc_total_num_acl_data_packets,
+                send=self.send_hci_packet,
+            )
+
+        hc_le_acl_data_packet_length = 0
+        hc_total_num_le_acl_data_packets = 0
         if self.supports_command(HCI_LE_READ_BUFFER_SIZE_COMMAND):
             response = await self.send_command(
                 HCI_LE_Read_Buffer_Size_Command(), check_result=True
             )
-            self.hc_le_acl_data_packet_length = (
+            hc_le_acl_data_packet_length = (
                 response.return_parameters.hc_le_acl_data_packet_length
             )
-            self.hc_total_num_le_acl_data_packets = (
+            hc_total_num_le_acl_data_packets = (
                 response.return_parameters.hc_total_num_le_acl_data_packets
             )
 
             logger.debug(
                 'HCI LE ACL flow control: '
-                f'hc_le_acl_data_packet_length={self.hc_le_acl_data_packet_length},'
+                f'hc_le_acl_data_packet_length={hc_le_acl_data_packet_length},'
-                'hc_total_num_le_acl_data_packets='
+                f'hc_total_num_le_acl_data_packets={hc_total_num_le_acl_data_packets}'
-                f'{self.hc_total_num_le_acl_data_packets}'
             )
 
-            if (
+        if hc_le_acl_data_packet_length == 0 or hc_total_num_le_acl_data_packets == 0:
-                response.return_parameters.hc_le_acl_data_packet_length == 0
+            # LE and Classic share the same queue
-                or response.return_parameters.hc_total_num_le_acl_data_packets == 0
+            self.le_acl_packet_queue = self.acl_packet_queue
-            ):
+        else:
-                # LE and Classic share the same values
+            # Create a separate queue for LE
-                self.hc_le_acl_data_packet_length = self.hc_acl_data_packet_length
+            self.le_acl_packet_queue = AclPacketQueue(
-                self.hc_total_num_le_acl_data_packets = (
+                max_packet_size=hc_le_acl_data_packet_length,
-                    self.hc_total_num_acl_data_packets
+                max_in_flight=hc_total_num_le_acl_data_packets,
-                )
+                send=self.send_hci_packet,
+            )
 
         if self.supports_command(
             HCI_LE_READ_SUGGESTED_DEFAULT_DATA_LENGTH_COMMAND
@@ -313,29 +357,31 @@ class Host(AbortableEventEmitter):
                     )
                 )
 
-        self.reset_done = True
-
     @property
-    def controller(self) -> TransportSink:
+    def controller(self) -> Optional[TransportSink]:
         return self.hci_sink
 
     @controller.setter
-    def controller(self, controller):
+    def controller(self, controller) -> None:
         self.set_packet_sink(controller)
         if controller:
             controller.set_packet_sink(self)
 
-    def set_packet_sink(self, sink: TransportSink) -> None:
+    def set_packet_sink(self, sink: Optional[TransportSink]) -> None:
         self.hci_sink = sink
 
+    def set_packet_source(self, source: TransportSource) -> None:
+        source.set_packet_sink(self)
+        self.hci_metadata = getattr(source, 'metadata', self.hci_metadata)
+
     def send_hci_packet(self, packet: HCI_Packet) -> None:
+        logger.debug(f'{color("### HOST -> CONTROLLER", "blue")}: {packet}')
         if self.snooper:
             self.snooper.snoop(bytes(packet), Snooper.Direction.HOST_TO_CONTROLLER)
-        self.hci_sink.on_packet(bytes(packet))
+        if self.hci_sink:
+            self.hci_sink.on_packet(bytes(packet))
 
     async def send_command(self, command, check_result=False):
-        logger.debug(f'{color("### HOST -> CONTROLLER", "blue")}: {command}')
-
         # Wait until we can send (only one pending command at a time)
         async with self.command_semaphore:
             assert self.pending_command is None
@@ -383,6 +429,17 @@ class Host(AbortableEventEmitter):
         asyncio.create_task(send_command(command))
 
     def send_l2cap_pdu(self, connection_handle: int, cid: int, pdu: bytes) -> None:
+        if not (connection := self.connections.get(connection_handle)):
+            logger.warning(f'connection 0x{connection_handle:04X} not found')
+            return
+        packet_queue = connection.acl_packet_queue
+        if packet_queue is None:
+            logger.warning(
+                f'no ACL packet queue for connection 0x{connection_handle:04X}'
+            )
+            return
+
+        # Create a PDU
         l2cap_pdu = bytes(L2CAP_PDU(cid, pdu))
 
         # Send the data to the controller via ACL packets
@@ -390,8 +447,7 @@ class Host(AbortableEventEmitter):
         offset = 0
         pb_flag = 0
         while bytes_remaining:
-            # TODO: support different LE/Classic lengths
+            data_total_length = min(bytes_remaining, packet_queue.max_packet_size)
-            data_total_length = min(bytes_remaining, self.hc_le_acl_data_packet_length)
             acl_packet = HCI_AclDataPacket(
                 connection_handle=connection_handle,
                 pb_flag=pb_flag,
@@ -399,34 +455,12 @@ class Host(AbortableEventEmitter):
                 data_total_length=data_total_length,
                 data=l2cap_pdu[offset : offset + data_total_length],
             )
-            logger.debug(
+            logger.debug(f'>>> ACL packet enqueue: (CID={cid}) {acl_packet}')
-                f'{color("### HOST -> CONTROLLER", "blue")}: (CID={cid}) {acl_packet}'
+            packet_queue.enqueue(acl_packet)
-            )
-            self.queue_acl_packet(acl_packet)
             pb_flag = 1
             offset += data_total_length
             bytes_remaining -= data_total_length
 
-    def queue_acl_packet(self, acl_packet: HCI_AclDataPacket) -> None:
-        self.acl_packet_queue.appendleft(acl_packet)
-        self.check_acl_packet_queue()
-
-        if len(self.acl_packet_queue):
-            logger.debug(
-                f'{self.acl_packets_in_flight} ACL packets in flight, '
-                f'{len(self.acl_packet_queue)} in queue'
-            )
-
-    def check_acl_packet_queue(self) -> None:
-        # Send all we can (TODO: support different LE/Classic limits)
-        while (
-            len(self.acl_packet_queue) > 0
-            and self.acl_packets_in_flight < self.hc_total_num_le_acl_data_packets
-        ):
-            packet = self.acl_packet_queue.pop()
-            self.send_hci_packet(packet)
-            self.acl_packets_in_flight += 1
-
     def supports_command(self, command):
         # Find the support flag position for this command
         for octet, flags in enumerate(HCI_SUPPORTED_COMMANDS_FLAGS):
@@ -549,7 +583,7 @@ class Host(AbortableEventEmitter):
             # This is used just for the Num_HCI_Command_Packets field, not related to
             # an actual command
             logger.debug('no-command event')
-            return None
+            return
 
         return self.on_command_processed(event)
 
@@ -557,18 +591,17 @@ class Host(AbortableEventEmitter):
         return self.on_command_processed(event)
 
     def on_hci_number_of_completed_packets_event(self, event):
-        total_packets = sum(event.num_completed_packets)
+        for connection_handle, num_completed_packets in zip(
-        if total_packets <= self.acl_packets_in_flight:
+            event.connection_handles, event.num_completed_packets
-            self.acl_packets_in_flight -= total_packets
+        ):
-            self.check_acl_packet_queue()
+            if not (connection := self.connections.get(connection_handle)):
-        else:
+                logger.warning(
-            logger.warning(
+                    'received packet completion event for unknown handle '
-                color(
+                    f'0x{connection_handle:04X}'
-                    '!!! {total_packets} completed but only '
-                    f'{self.acl_packets_in_flight} in flight'
                 )
-            )
+                continue
-            self.acl_packets_in_flight = 0
+
+            connection.acl_packet_queue.on_packets_completed(num_completed_packets)
 
     # Classic only
     def on_hci_connection_request_event(self, event):
@@ -721,6 +754,14 @@ class Host(AbortableEventEmitter):
     def on_hci_le_extended_advertising_report_event(self, event):
         self.on_hci_le_advertising_report_event(event)
 
+    def on_hci_le_advertising_set_terminated_event(self, event):
+        self.emit(
+            'advertising_set_termination',
+            event.status,
+            event.advertising_handle,
+            event.connection_handle,
+        )
+
     def on_hci_le_cis_request_event(self, event):
         self.emit(
             'cis_request',

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
 
@@ -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
@@ -1644,12 +1648,13 @@ 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):

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/bap.py

@@ -23,13 +23,21 @@ import dataclasses
 import enum
 import struct
 import functools
-from typing import Optional, List, Union
+import logging
+from typing import Optional, List, Union, Type, Dict, Any, Tuple, cast
 
+from bumble import colors
+from bumble import device
 from bumble import hci
 from bumble import gatt
 from bumble import gatt_client
 
 
+# -----------------------------------------------------------------------------
+# Logging
+# -----------------------------------------------------------------------------
+logger = logging.getLogger(__name__)
+
 # -----------------------------------------------------------------------------
 # Constants
 # -----------------------------------------------------------------------------
@@ -106,7 +114,7 @@ class SamplingFrequency(enum.IntEnum):
     '''Bluetooth Assigned Numbers, Section 6.12.5.1 - Sampling Frequency'''
 
     # fmt: off
-    FREQ_8000    = 0x01 
+    FREQ_8000    = 0x01
     FREQ_11025   = 0x02
     FREQ_16000   = 0x03
     FREQ_22050   = 0x04
@@ -220,6 +228,231 @@ class SupportedFrameDuration(enum.IntFlag):
     DURATION_10000_US_PREFERRED = 0b0010
 
 
+# -----------------------------------------------------------------------------
+# ASE Operations
+# -----------------------------------------------------------------------------
+
+
+class ASE_Operation:
+    '''
+    See Audio Stream Control Service - 5 ASE Control operations.
+    '''
+
+    classes: Dict[int, Type[ASE_Operation]] = {}
+    op_code: int
+    name: str
+    fields: Optional[Sequence[Any]] = None
+    ase_id: List[int]
+
+    class Opcode(enum.IntEnum):
+        # fmt: off
+        CONFIG_CODEC         = 0x01
+        CONFIG_QOS           = 0x02
+        ENABLE               = 0x03
+        RECEIVER_START_READY = 0x04
+        DISABLE              = 0x05
+        RECEIVER_STOP_READY  = 0x06
+        UPDATE_METADATA      = 0x07
+        RELEASE              = 0x08
+
+    @staticmethod
+    def from_bytes(pdu: bytes) -> ASE_Operation:
+        op_code = pdu[0]
+
+        cls = ASE_Operation.classes.get(op_code)
+        if cls is None:
+            instance = ASE_Operation(pdu)
+            instance.name = ASE_Operation.Opcode(op_code).name
+            instance.op_code = op_code
+            return instance
+        self = cls.__new__(cls)
+        ASE_Operation.__init__(self, pdu)
+        if self.fields is not None:
+            self.init_from_bytes(pdu, 1)
+        return self
+
+    @staticmethod
+    def subclass(fields):
+        def inner(cls: Type[ASE_Operation]):
+            try:
+                operation = ASE_Operation.Opcode[cls.__name__[4:].upper()]
+                cls.name = operation.name
+                cls.op_code = operation
+            except:
+                raise KeyError(f'PDU name {cls.name} not found in Ase_Operation.Opcode')
+            cls.fields = fields
+
+            # Register a factory for this class
+            ASE_Operation.classes[cls.op_code] = cls
+
+            return cls
+
+        return inner
+
+    def __init__(self, pdu: Optional[bytes] = None, **kwargs) -> None:
+        if self.fields is not None and kwargs:
+            hci.HCI_Object.init_from_fields(self, self.fields, kwargs)
+        if pdu is None:
+            pdu = bytes([self.op_code]) + hci.HCI_Object.dict_to_bytes(
+                kwargs, self.fields
+            )
+        self.pdu = pdu
+
+    def init_from_bytes(self, pdu: bytes, offset: int):
+        return hci.HCI_Object.init_from_bytes(self, pdu, offset, self.fields)
+
+    def __bytes__(self) -> bytes:
+        return self.pdu
+
+    def __str__(self) -> str:
+        result = f'{colors.color(self.name, "yellow")} '
+        if fields := getattr(self, 'fields', None):
+            result += ':\n' + hci.HCI_Object.format_fields(self.__dict__, fields, '  ')
+        else:
+            if len(self.pdu) > 1:
+                result += f': {self.pdu.hex()}'
+        return result
+
+
+@ASE_Operation.subclass(
+    [
+        [
+            ('ase_id', 1),
+            ('target_latency', 1),
+            ('target_phy', 1),
+            ('codec_id', hci.CodingFormat.parse_from_bytes),
+            ('codec_specific_configuration', 'v'),
+        ],
+    ]
+)
+class ASE_Config_Codec(ASE_Operation):
+    '''
+    See Audio Stream Control Service 5.1 - Config Codec Operation
+    '''
+
+    target_latency: List[int]
+    target_phy: List[int]
+    codec_id: List[hci.CodingFormat]
+    codec_specific_configuration: List[bytes]
+
+
+@ASE_Operation.subclass(
+    [
+        [
+            ('ase_id', 1),
+            ('cig_id', 1),
+            ('cis_id', 1),
+            ('sdu_interval', 3),
+            ('framing', 1),
+            ('phy', 1),
+            ('max_sdu', 2),
+            ('retransmission_number', 1),
+            ('max_transport_latency', 2),
+            ('presentation_delay', 3),
+        ],
+    ]
+)
+class ASE_Config_QOS(ASE_Operation):
+    '''
+    See Audio Stream Control Service 5.2 - Config Qos Operation
+    '''
+
+    cig_id: List[int]
+    cis_id: List[int]
+    sdu_interval: List[int]
+    framing: List[int]
+    phy: List[int]
+    max_sdu: List[int]
+    retransmission_number: List[int]
+    max_transport_latency: List[int]
+    presentation_delay: List[int]
+
+
+@ASE_Operation.subclass([[('ase_id', 1), ('metadata', 'v')]])
+class ASE_Enable(ASE_Operation):
+    '''
+    See Audio Stream Control Service 5.3 - Enable Operation
+    '''
+
+    metadata: bytes
+
+
+@ASE_Operation.subclass([[('ase_id', 1)]])
+class ASE_Receiver_Start_Ready(ASE_Operation):
+    '''
+    See Audio Stream Control Service 5.4 - Receiver Start Ready Operation
+    '''
+
+
+@ASE_Operation.subclass([[('ase_id', 1)]])
+class ASE_Disable(ASE_Operation):
+    '''
+    See Audio Stream Control Service 5.5 - Disable Operation
+    '''
+
+
+@ASE_Operation.subclass([[('ase_id', 1)]])
+class ASE_Receiver_Stop_Ready(ASE_Operation):
+    '''
+    See Audio Stream Control Service 5.6 - Receiver Stop Ready Operation
+    '''
+
+
+@ASE_Operation.subclass([[('ase_id', 1), ('metadata', 'v')]])
+class ASE_Update_Metadata(ASE_Operation):
+    '''
+    See Audio Stream Control Service 5.7 - Update Metadata Operation
+    '''
+
+    metadata: List[bytes]
+
+
+@ASE_Operation.subclass([[('ase_id', 1)]])
+class ASE_Release(ASE_Operation):
+    '''
+    See Audio Stream Control Service 5.8 - Release Operation
+    '''
+
+
+class AseResponseCode(enum.IntEnum):
+    # fmt: off
+    SUCCESS                                     = 0x00
+    UNSUPPORTED_OPCODE                          = 0x01
+    INVALID_LENGTH                              = 0x02
+    INVALID_ASE_ID                              = 0x03
+    INVALID_ASE_STATE_MACHINE_TRANSITION        = 0x04
+    INVALID_ASE_DIRECTION                       = 0x05
+    UNSUPPORTED_AUDIO_CAPABILITIES              = 0x06
+    UNSUPPORTED_CONFIGURATION_PARAMETER_VALUE   = 0x07
+    REJECTED_CONFIGURATION_PARAMETER_VALUE      = 0x08
+    INVALID_CONFIGURATION_PARAMETER_VALUE       = 0x09
+    UNSUPPORTED_METADATA                        = 0x0A
+    REJECTED_METADATA                           = 0x0B
+    INVALID_METADATA                            = 0x0C
+    INSUFFICIENT_RESOURCES                      = 0x0D
+    UNSPECIFIED_ERROR                           = 0x0E
+
+
+class AseReasonCode(enum.IntEnum):
+    # fmt: off
+    NONE                            = 0x00
+    CODEC_ID                        = 0x01
+    CODEC_SPECIFIC_CONFIGURATION    = 0x02
+    SDU_INTERVAL                    = 0x03
+    FRAMING                         = 0x04
+    PHY                             = 0x05
+    MAXIMUM_SDU_SIZE                = 0x06
+    RETRANSMISSION_NUMBER           = 0x07
+    MAX_TRANSPORT_LATENCY           = 0x08
+    PRESENTATION_DELAY              = 0x09
+    INVALID_ASE_CIS_MAPPING         = 0x0A
+
+
+class AudioRole(enum.IntEnum):
+    SINK = hci.HCI_LE_Setup_ISO_Data_Path_Command.Direction.CONTROLLER_TO_HOST
+    SOURCE = hci.HCI_LE_Setup_ISO_Data_Path_Command.Direction.HOST_TO_CONTROLLER
+
+
 # -----------------------------------------------------------------------------
 # Utils
 # -----------------------------------------------------------------------------
@@ -325,6 +558,80 @@ class CodecSpecificCapabilities:
         )
 
 
+@dataclasses.dataclass
+class CodecSpecificConfiguration:
+    '''See:
+    * Bluetooth Assigned Numbers, 6.12.5 - Codec Specific Configuration LTV Structures
+    * Basic Audio Profile, 4.3.2 - Codec_Specific_Capabilities LTV requirements
+    '''
+
+    class Type(enum.IntEnum):
+        # fmt: off
+        SAMPLING_FREQUENCY       = 0x01
+        FRAME_DURATION           = 0x02
+        AUDIO_CHANNEL_ALLOCATION = 0x03
+        OCTETS_PER_FRAME         = 0x04
+        CODEC_FRAMES_PER_SDU     = 0x05
+
+    sampling_frequency: SamplingFrequency
+    frame_duration: FrameDuration
+    audio_channel_allocation: AudioLocation
+    octets_per_codec_frame: int
+    codec_frames_per_sdu: int
+
+    @classmethod
+    def from_bytes(cls, data: bytes) -> CodecSpecificConfiguration:
+        offset = 0
+        # Allowed default values.
+        audio_channel_allocation = AudioLocation.NOT_ALLOWED
+        codec_frames_per_sdu = 1
+        while offset < len(data):
+            length, type = struct.unpack_from('BB', data, offset)
+            offset += 2
+            value = int.from_bytes(data[offset : offset + length - 1], 'little')
+            offset += length - 1
+
+            if type == CodecSpecificConfiguration.Type.SAMPLING_FREQUENCY:
+                sampling_frequency = SamplingFrequency(value)
+            elif type == CodecSpecificConfiguration.Type.FRAME_DURATION:
+                frame_duration = FrameDuration(value)
+            elif type == CodecSpecificConfiguration.Type.AUDIO_CHANNEL_ALLOCATION:
+                audio_channel_allocation = AudioLocation(value)
+            elif type == CodecSpecificConfiguration.Type.OCTETS_PER_FRAME:
+                octets_per_codec_frame = value
+            elif type == CodecSpecificConfiguration.Type.CODEC_FRAMES_PER_SDU:
+                codec_frames_per_sdu = value
+
+        # It is expected here that if some fields are missing, an error should be raised.
+        return CodecSpecificConfiguration(
+            sampling_frequency=sampling_frequency,
+            frame_duration=frame_duration,
+            audio_channel_allocation=audio_channel_allocation,
+            octets_per_codec_frame=octets_per_codec_frame,
+            codec_frames_per_sdu=codec_frames_per_sdu,
+        )
+
+    def __bytes__(self) -> bytes:
+        return struct.pack(
+            '<BBBBBBBBIBBHBBB',
+            2,
+            CodecSpecificConfiguration.Type.SAMPLING_FREQUENCY,
+            self.sampling_frequency,
+            2,
+            CodecSpecificConfiguration.Type.FRAME_DURATION,
+            self.frame_duration,
+            5,
+            CodecSpecificConfiguration.Type.AUDIO_CHANNEL_ALLOCATION,
+            self.audio_channel_allocation,
+            3,
+            CodecSpecificConfiguration.Type.OCTETS_PER_FRAME,
+            self.octets_per_codec_frame,
+            2,
+            CodecSpecificConfiguration.Type.CODEC_FRAMES_PER_SDU,
+            self.codec_frames_per_sdu,
+        )
+
+
 @dataclasses.dataclass
 class PacRecord:
     coding_format: hci.CodingFormat
@@ -452,6 +759,429 @@ class PublishedAudioCapabilitiesService(gatt.TemplateService):
         super().__init__(characteristics)
 
 
+class AseStateMachine(gatt.Characteristic):
+    class State(enum.IntEnum):
+        # fmt: off
+        IDLE             = 0x00
+        CODEC_CONFIGURED = 0x01
+        QOS_CONFIGURED   = 0x02
+        ENABLING         = 0x03
+        STREAMING        = 0x04
+        DISABLING        = 0x05
+        RELEASING        = 0x06
+
+    cis_link: Optional[device.CisLink] = None
+
+    # Additional parameters in CODEC_CONFIGURED State
+    preferred_framing = 0  # Unframed PDU supported
+    preferred_phy = 0
+    preferred_retransmission_number = 13
+    preferred_max_transport_latency = 100
+    supported_presentation_delay_min = 0
+    supported_presentation_delay_max = 0
+    preferred_presentation_delay_min = 0
+    preferred_presentation_delay_max = 0
+    codec_id = hci.CodingFormat(hci.CodecID.LC3)
+    codec_specific_configuration: Union[CodecSpecificConfiguration, bytes] = b''
+
+    # Additional parameters in QOS_CONFIGURED State
+    cig_id = 0
+    cis_id = 0
+    sdu_interval = 0
+    framing = 0
+    phy = 0
+    max_sdu = 0
+    retransmission_number = 0
+    max_transport_latency = 0
+    presentation_delay = 0
+
+    # Additional parameters in ENABLING, STREAMING, DISABLING State
+    # TODO: Parse this
+    metadata = b''
+
+    def __init__(
+        self,
+        role: AudioRole,
+        ase_id: int,
+        service: AudioStreamControlService,
+    ) -> None:
+        self.service = service
+        self.ase_id = ase_id
+        self._state = AseStateMachine.State.IDLE
+        self.role = role
+
+        uuid = (
+            gatt.GATT_SINK_ASE_CHARACTERISTIC
+            if role == AudioRole.SINK
+            else gatt.GATT_SOURCE_ASE_CHARACTERISTIC
+        )
+        super().__init__(
+            uuid=uuid,
+            properties=gatt.Characteristic.Properties.READ
+            | gatt.Characteristic.Properties.NOTIFY,
+            permissions=gatt.Characteristic.Permissions.READABLE,
+            value=gatt.CharacteristicValue(read=self.on_read),
+        )
+
+        self.service.device.on('cis_request', self.on_cis_request)
+        self.service.device.on('cis_establishment', self.on_cis_establishment)
+
+    def on_cis_request(
+        self,
+        acl_connection: device.Connection,
+        cis_handle: int,
+        cig_id: int,
+        cis_id: int,
+    ) -> None:
+        if cis_id == self.cis_id and self.state == self.State.ENABLING:
+            acl_connection.abort_on(
+                'flush', self.service.device.accept_cis_request(cis_handle)
+            )
+
+    def on_cis_establishment(self, cis_link: device.CisLink) -> None:
+        if cis_link.cis_id == self.cis_id and self.state == self.State.ENABLING:
+            self.state = self.State.STREAMING
+            self.cis_link = cis_link
+
+            async def post_cis_established():
+                await self.service.device.send_command(
+                    hci.HCI_LE_Setup_ISO_Data_Path_Command(
+                        connection_handle=cis_link.handle,
+                        data_path_direction=self.role,
+                        data_path_id=0x00,  # Fixed HCI
+                        codec_id=hci.CodingFormat(hci.CodecID.TRANSPARENT),
+                        controller_delay=0,
+                        codec_configuration=b'',
+                    )
+                )
+                await self.service.device.notify_subscribers(self, self.value)
+
+            cis_link.acl_connection.abort_on('flush', post_cis_established())
+
+    def on_config_codec(
+        self,
+        target_latency: int,
+        target_phy: int,
+        codec_id: hci.CodingFormat,
+        codec_specific_configuration: bytes,
+    ) -> Tuple[AseResponseCode, AseReasonCode]:
+        if self.state not in (
+            self.State.IDLE,
+            self.State.CODEC_CONFIGURED,
+            self.State.QOS_CONFIGURED,
+        ):
+            return (
+                AseResponseCode.INVALID_ASE_STATE_MACHINE_TRANSITION,
+                AseReasonCode.NONE,
+            )
+
+        self.max_transport_latency = target_latency
+        self.phy = target_phy
+        self.codec_id = codec_id
+        if codec_id.codec_id == hci.CodecID.VENDOR_SPECIFIC:
+            self.codec_specific_configuration = codec_specific_configuration
+        else:
+            self.codec_specific_configuration = CodecSpecificConfiguration.from_bytes(
+                codec_specific_configuration
+            )
+
+        self.state = self.State.CODEC_CONFIGURED
+
+        return (AseResponseCode.SUCCESS, AseReasonCode.NONE)
+
+    def on_config_qos(
+        self,
+        cig_id: int,
+        cis_id: int,
+        sdu_interval: int,
+        framing: int,
+        phy: int,
+        max_sdu: int,
+        retransmission_number: int,
+        max_transport_latency: int,
+        presentation_delay: int,
+    ) -> Tuple[AseResponseCode, AseReasonCode]:
+        if self.state not in (
+            AseStateMachine.State.CODEC_CONFIGURED,
+            AseStateMachine.State.QOS_CONFIGURED,
+        ):
+            return (
+                AseResponseCode.INVALID_ASE_STATE_MACHINE_TRANSITION,
+                AseReasonCode.NONE,
+            )
+
+        self.cig_id = cig_id
+        self.cis_id = cis_id
+        self.sdu_interval = sdu_interval
+        self.framing = framing
+        self.phy = phy
+        self.max_sdu = max_sdu
+        self.retransmission_number = retransmission_number
+        self.max_transport_latency = max_transport_latency
+        self.presentation_delay = presentation_delay
+
+        self.state = self.State.QOS_CONFIGURED
+
+        return (AseResponseCode.SUCCESS, AseReasonCode.NONE)
+
+    def on_enable(self, metadata: bytes) -> Tuple[AseResponseCode, AseReasonCode]:
+        if self.state != AseStateMachine.State.QOS_CONFIGURED:
+            return (
+                AseResponseCode.INVALID_ASE_STATE_MACHINE_TRANSITION,
+                AseReasonCode.NONE,
+            )
+
+        self.metadata = metadata
+        self.state = self.State.ENABLING
+
+        return (AseResponseCode.SUCCESS, AseReasonCode.NONE)
+
+    def on_receiver_start_ready(self) -> Tuple[AseResponseCode, AseReasonCode]:
+        if self.state != AseStateMachine.State.ENABLING:
+            return (
+                AseResponseCode.INVALID_ASE_STATE_MACHINE_TRANSITION,
+                AseReasonCode.NONE,
+            )
+        self.state = self.State.STREAMING
+        return (AseResponseCode.SUCCESS, AseReasonCode.NONE)
+
+    def on_disable(self) -> Tuple[AseResponseCode, AseReasonCode]:
+        if self.state not in (
+            AseStateMachine.State.ENABLING,
+            AseStateMachine.State.STREAMING,
+        ):
+            return (
+                AseResponseCode.INVALID_ASE_STATE_MACHINE_TRANSITION,
+                AseReasonCode.NONE,
+            )
+        self.state = self.State.DISABLING
+        return (AseResponseCode.SUCCESS, AseReasonCode.NONE)
+
+    def on_receiver_stop_ready(self) -> Tuple[AseResponseCode, AseReasonCode]:
+        if self.state != AseStateMachine.State.DISABLING:
+            return (
+                AseResponseCode.INVALID_ASE_STATE_MACHINE_TRANSITION,
+                AseReasonCode.NONE,
+            )
+        self.state = self.State.QOS_CONFIGURED
+        return (AseResponseCode.SUCCESS, AseReasonCode.NONE)
+
+    def on_update_metadata(
+        self, metadata: bytes
+    ) -> Tuple[AseResponseCode, AseReasonCode]:
+        if self.state not in (
+            AseStateMachine.State.ENABLING,
+            AseStateMachine.State.STREAMING,
+        ):
+            return (
+                AseResponseCode.INVALID_ASE_STATE_MACHINE_TRANSITION,
+                AseReasonCode.NONE,
+            )
+        self.metadata = metadata
+        return (AseResponseCode.SUCCESS, AseReasonCode.NONE)
+
+    def on_release(self) -> Tuple[AseResponseCode, AseReasonCode]:
+        if self.state == AseStateMachine.State.IDLE:
+            return (
+                AseResponseCode.INVALID_ASE_STATE_MACHINE_TRANSITION,
+                AseReasonCode.NONE,
+            )
+        self.state = self.State.RELEASING
+
+        async def remove_cis_async():
+            await self.service.device.send_command(
+                hci.HCI_LE_Remove_ISO_Data_Path_Command(
+                    connection_handle=self.cis_link.handle,
+                    data_path_direction=self.role,
+                )
+            )
+            self.state = self.State.IDLE
+            await self.service.device.notify_subscribers(self, self.value)
+
+        self.service.device.abort_on('flush', remove_cis_async())
+        return (AseResponseCode.SUCCESS, AseReasonCode.NONE)
+
+    @property
+    def state(self) -> State:
+        return self._state
+
+    @state.setter
+    def state(self, new_state: State) -> None:
+        logger.debug(f'{self} state change -> {colors.color(new_state.name, "cyan")}')
+        self._state = new_state
+
+    @property
+    def value(self):
+        '''Returns ASE_ID, ASE_STATE, and ASE Additional Parameters.'''
+
+        if self.state == self.State.CODEC_CONFIGURED:
+            codec_specific_configuration_bytes = bytes(
+                self.codec_specific_configuration
+            )
+            additional_parameters = (
+                struct.pack(
+                    '<BBBH',
+                    self.preferred_framing,
+                    self.preferred_phy,
+                    self.preferred_retransmission_number,
+                    self.preferred_max_transport_latency,
+                )
+                + self.supported_presentation_delay_min.to_bytes(3, 'little')
+                + self.supported_presentation_delay_max.to_bytes(3, 'little')
+                + self.preferred_presentation_delay_min.to_bytes(3, 'little')
+                + self.preferred_presentation_delay_max.to_bytes(3, 'little')
+                + bytes(self.codec_id)
+                + bytes([len(codec_specific_configuration_bytes)])
+                + codec_specific_configuration_bytes
+            )
+        elif self.state == self.State.QOS_CONFIGURED:
+            additional_parameters = (
+                bytes([self.cig_id, self.cis_id])
+                + self.sdu_interval.to_bytes(3, 'little')
+                + struct.pack(
+                    '<BBHBH',
+                    self.framing,
+                    self.phy,
+                    self.max_sdu,
+                    self.retransmission_number,
+                    self.max_transport_latency,
+                )
+                + self.presentation_delay.to_bytes(3, 'little')
+            )
+        elif self.state in (
+            self.State.ENABLING,
+            self.State.STREAMING,
+            self.State.DISABLING,
+        ):
+            additional_parameters = (
+                bytes([self.cig_id, self.cis_id, len(self.metadata)]) + self.metadata
+            )
+        else:
+            additional_parameters = b''
+
+        return bytes([self.ase_id, self.state]) + additional_parameters
+
+    @value.setter
+    def value(self, _new_value):
+        # Readonly. Do nothing in the setter.
+        pass
+
+    def on_read(self, _: Optional[device.Connection]) -> bytes:
+        return self.value
+
+    def __str__(self) -> str:
+        return (
+            f'AseStateMachine(id={self.ase_id}, role={self.role.name} '
+            f'state={self._state.name})'
+        )
+
+
+class AudioStreamControlService(gatt.TemplateService):
+    UUID = gatt.GATT_AUDIO_STREAM_CONTROL_SERVICE
+
+    ase_state_machines: Dict[int, AseStateMachine]
+    ase_control_point: gatt.Characteristic
+
+    def __init__(
+        self,
+        device: device.Device,
+        source_ase_id: Sequence[int] = [],
+        sink_ase_id: Sequence[int] = [],
+    ) -> None:
+        self.device = device
+        self.ase_state_machines = {
+            **{
+                id: AseStateMachine(role=AudioRole.SINK, ase_id=id, service=self)
+                for id in sink_ase_id
+            },
+            **{
+                id: AseStateMachine(role=AudioRole.SOURCE, ase_id=id, service=self)
+                for id in source_ase_id
+            },
+        }  # ASE state machines, by ASE ID
+
+        self.ase_control_point = gatt.Characteristic(
+            uuid=gatt.GATT_ASE_CONTROL_POINT_CHARACTERISTIC,
+            properties=gatt.Characteristic.Properties.WRITE
+            | gatt.Characteristic.Properties.WRITE_WITHOUT_RESPONSE
+            | gatt.Characteristic.Properties.NOTIFY,
+            permissions=gatt.Characteristic.Permissions.WRITEABLE,
+            value=gatt.CharacteristicValue(write=self.on_write_ase_control_point),
+        )
+
+        super().__init__([self.ase_control_point, *self.ase_state_machines.values()])
+
+    def on_operation(self, opcode: ASE_Operation.Opcode, ase_id: int, args):
+        if ase := self.ase_state_machines.get(ase_id):
+            handler = getattr(ase, 'on_' + opcode.name.lower())
+            return (ase_id, *handler(*args))
+        else:
+            return (ase_id, AseResponseCode.INVALID_ASE_ID, AseReasonCode.NONE)
+
+    def on_write_ase_control_point(self, connection, data):
+        operation = ASE_Operation.from_bytes(data)
+        responses = []
+        logger.debug(f'*** ASCS Write {operation} ***')
+
+        if operation.op_code == ASE_Operation.Opcode.CONFIG_CODEC:
+            for ase_id, *args in zip(
+                operation.ase_id,
+                operation.target_latency,
+                operation.target_phy,
+                operation.codec_id,
+                operation.codec_specific_configuration,
+            ):
+                responses.append(self.on_operation(operation.op_code, ase_id, args))
+        elif operation.op_code == ASE_Operation.Opcode.CONFIG_QOS:
+            for ase_id, *args in zip(
+                operation.ase_id,
+                operation.cig_id,
+                operation.cis_id,
+                operation.sdu_interval,
+                operation.framing,
+                operation.phy,
+                operation.max_sdu,
+                operation.retransmission_number,
+                operation.max_transport_latency,
+                operation.presentation_delay,
+            ):
+                responses.append(self.on_operation(operation.op_code, ase_id, args))
+        elif operation.op_code in (
+            ASE_Operation.Opcode.ENABLE,
+            ASE_Operation.Opcode.UPDATE_METADATA,
+        ):
+            for ase_id, *args in zip(
+                operation.ase_id,
+                operation.metadata,
+            ):
+                responses.append(self.on_operation(operation.op_code, ase_id, args))
+        elif operation.op_code in (
+            ASE_Operation.Opcode.RECEIVER_START_READY,
+            ASE_Operation.Opcode.DISABLE,
+            ASE_Operation.Opcode.RECEIVER_STOP_READY,
+            ASE_Operation.Opcode.RELEASE,
+        ):
+            for ase_id in operation.ase_id:
+                responses.append(self.on_operation(operation.op_code, ase_id, []))
+
+        control_point_notification = bytes(
+            [operation.op_code, len(responses)]
+        ) + b''.join(map(bytes, responses))
+        self.device.abort_on(
+            'flush',
+            self.device.notify_subscribers(
+                self.ase_control_point, control_point_notification
+            ),
+        )
+
+        for ase_id, *_ in responses:
+            if ase := self.ase_state_machines.get(ase_id):
+                self.device.abort_on(
+                    'flush',
+                    self.device.notify_subscribers(ase, ase.value),
+                )
+
+
 # -----------------------------------------------------------------------------
 # Client
 # -----------------------------------------------------------------------------
@@ -494,3 +1224,24 @@ class PublishedAudioCapabilitiesServiceProxy(gatt_client.ProfileServiceProxy):
             gatt.GATT_SOURCE_AUDIO_LOCATION_CHARACTERISTIC
         ):
             self.source_audio_locations = characteristics[0]
+
+
+class AudioStreamControlServiceProxy(gatt_client.ProfileServiceProxy):
+    SERVICE_CLASS = AudioStreamControlService
+
+    sink_ase: List[gatt_client.CharacteristicProxy]
+    source_ase: List[gatt_client.CharacteristicProxy]
+    ase_control_point: gatt_client.CharacteristicProxy
+
+    def __init__(self, service_proxy: gatt_client.ServiceProxy):
+        self.service_proxy = service_proxy
+
+        self.sink_ase = service_proxy.get_characteristics_by_uuid(
+            gatt.GATT_SINK_ASE_CHARACTERISTIC
+        )
+        self.source_ase = service_proxy.get_characteristics_by_uuid(
+            gatt.GATT_SOURCE_ASE_CHARACTERISTIC
+        )
+        self.ase_control_point = service_proxy.get_characteristics_by_uuid(
+            gatt.GATT_ASE_CONTROL_POINT_CHARACTERISTIC
+        )[0]

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/rfcomm.py

@@ -118,8 +118,8 @@ CRC_TABLE = bytes([
     0XBA, 0X2B, 0X59, 0XC8, 0XBD, 0X2C, 0X5E, 0XCF
 ])
 
-RFCOMM_DEFAULT_INITIAL_RX_CREDITS = 7
+RFCOMM_DEFAULT_WINDOW_SIZE    = 16
-RFCOMM_DEFAULT_PREFERRED_MTU      = 1280
+RFCOMM_DEFAULT_MAX_FRAME_SIZE = 2000
 
 RFCOMM_DYNAMIC_CHANNEL_NUMBER_START = 1
 RFCOMM_DYNAMIC_CHANNEL_NUMBER_END   = 30
@@ -438,20 +438,24 @@ 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
@@ -537,11 +541,11 @@ class DLC(EventEmitter):
         if len(data) and self.sink:
             self.sink(data)  # pylint: disable=not-callable
 
-        # Update the credits
+            # Update the credits
-        if self.rx_credits > 0:
+            if self.rx_credits > 0:
-            self.rx_credits -= 1
+                self.rx_credits -= 1
-        else:
+            else:
-            logger.warning(color('!!! received frame with no rx credits', 'red'))
+                logger.warning(color('!!! received frame with no rx credits', 'red'))
 
         # Check if there's anything to send (including credits)
         self.process_tx()
@@ -580,9 +584,9 @@ 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))
         logger.debug(f'>>> PN Response: {pn}')
@@ -591,7 +595,7 @@ class DLC(EventEmitter):
 
     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 +635,8 @@ 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 +649,11 @@ 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})'
@@ -843,7 +849,12 @@ 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')
@@ -855,9 +866,9 @@ 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))
         logger.debug(f'>>> Sending MCC: {pn}')

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 +80,106 @@ 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
+    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(',')])
+        else:
+            metadata = None
+
+    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')
 

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

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/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):

bumble/utils.py

@@ -280,17 +280,14 @@ class AsyncRunner:
             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)

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:
@@ -35,17 +55,18 @@ 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
-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
 running the ``central`` command.
 When using Bluetooth LE (all modes except for ``rfcomm-server`` and ``rfcomm-client``utils),
-the default addresses configured in the tool should be sufficient. But when using 
+the default addresses configured in the tool should be sufficient. But when using
-Bluetooth Classic, the address of the Peripheral must be specified on the Central 
+Bluetooth Classic, the address of the Peripheral must be specified on the Central
 using the ``--peripheral`` option. The address will be printed by the Peripheral when
 it starts.
 
@@ -83,7 +104,7 @@ the other on `usb:1`, and two consoles/terminals. We will run a command in each.
     $ bumble-bench central usb:1
     ```
 
-    In this default configuration, the Central runs a Sender, as a GATT client, 
+    In this default configuration, the Central runs a Sender, as a GATT client,
     connecting to the Peripheral running a Receiver, as a GATT server.
 
 !!! example "L2CAP Throughput"

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

@@ -1,13 +1,16 @@
 REALTEK DRIVER
 ==============
 
-This driver supports loading firmware images and optional config data to 
+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`

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 +1,6 @@
 {
     "name": "Bumble-LEA",
     "keystore": "JsonKeyStore",
+    "address": "F0:F1:F2:F3:F4:FA",
     "advertising_interval": 100
 }

examples/run_csis_servers.py

@@ -0,0 +1,116 @@
+# 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.start_extended_advertising(
+            advertising_properties=(
+                HCI_LE_Set_Extended_Advertising_Parameters_Command.AdvertisingProperties.CONNECTABLE_ADVERTISING
+            ),
+            own_address_type=OwnAddressType.RANDOM,
+            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_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
 
@@ -313,7 +316,9 @@ async def main():
         await hid_host.disconnect_interrupt_channel()
         await hid_host.disconnect_control_channel()
         await device.keystore.delete(target_address)  # type: ignore
-        await connection.disconnect()
+        connection = hid_host.connection
+        if connection is not None:
+            await connection.disconnect()
 
     def on_hid_virtual_cable_unplug_cb():
         asyncio.create_task(handle_virtual_cable_unplug())
@@ -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

@@ -19,12 +19,15 @@ import asyncio
 import logging
 import sys
 import os
+import struct
+import secrets
 from bumble.core import AdvertisingData
-from bumble.device import Device
+from bumble.device import Device, CisLink
 from bumble.hci import (
     CodecID,
     CodingFormat,
     OwnAddressType,
+    HCI_IsoDataPacket,
     HCI_LE_Set_Extended_Advertising_Parameters_Command,
 )
 from bumble.profiles.bap import (
@@ -35,7 +38,10 @@ from bumble.profiles.bap import (
     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
 
@@ -57,6 +63,11 @@ async def main() -> None:
 
         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,
@@ -103,21 +114,71 @@ async def main() -> None:
             )
         )
 
-        advertising_data = bytes(
+        device.add_service(AudioStreamControlService(device, sink_ase_id=[1, 2]))
-            AdvertisingData(
+
-                [
+        advertising_data = (
-                    (
+            bytes(
-                        AdvertisingData.COMPLETE_LOCAL_NAME,
+                AdvertisingData(
-                        bytes('Bumble LE Audio', 'utf-8'),
+                    [
-                    ),
+                        (
-                    (
+                            AdvertisingData.COMPLETE_LOCAL_NAME,
-                        AdvertisingData.INCOMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS,
+                            bytes('Bumble LE Audio', 'utf-8'),
-                        bytes(PublishedAudioCapabilitiesService.UUID),
+                        ),
-                    ),
+                        (
-                ]
+                            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.
+                24000 // 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)
+
         await device.start_extended_advertising(
             advertising_properties=(
                 HCI_LE_Set_Extended_Advertising_Parameters_Command.AdvertisingProperties.CONNECTABLE_ADVERTISING

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

@@ -28,8 +28,8 @@ private val Log = Logger.getLogger("btbench.l2cap-client")
 
 class L2capClient(
     private val viewModel: AppViewModel,
-    val bluetoothAdapter: BluetoothAdapter,
+    private val bluetoothAdapter: BluetoothAdapter,
-    val context: Context
+    private val context: Context
 ) {
     @SuppressLint("MissingPermission")
     fun run() {
@@ -74,12 +74,18 @@ class L2capClient(
                     gatt: BluetoothGatt?, status: Int, newState: Int
                 ) {
                     if (gatt != null && newState == BluetoothProfile.STATE_CONNECTED) {
-                        gatt.setPreferredPhy(
+                        if (viewModel.use2mPhy) {
-                            BluetoothDevice.PHY_LE_2M_MASK,
+                            gatt.setPreferredPhy(
-                            BluetoothDevice.PHY_LE_2M_MASK,
+                                BluetoothDevice.PHY_LE_2M_MASK,
-                            BluetoothDevice.PHY_OPTION_NO_PREFERRED
+                                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)
                     }
                 }
             },

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

@@ -23,19 +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 mutableStateOf(0)
+    var mtu by mutableIntStateOf(0)
-    var rxPhy by mutableStateOf(0)
+    var rxPhy by mutableIntStateOf(0)
-    var txPhy by mutableStateOf(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)
@@ -79,18 +80,18 @@ class AppViewModel : ViewModel() {
     }
 
     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()) {
@@ -100,18 +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()) {
@@ -121,18 +122,18 @@ class AppViewModel : ViewModel() {
     }
 
     fun updateSenderPacketSizeSlider() {
-        if (senderPacketSize <= 16) {
+        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()) {
@@ -142,18 +143,18 @@ class AppViewModel : ViewModel() {
     }
 
     fun updateSenderPacketSize() {
-        if (senderPacketSizeSlider < 0.1F) {
+        senderPacketSize = if (senderPacketSizeSlider < 0.1F) {
-            senderPacketSize = 16
+            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/RemoteHCI/app/src/main/java/com/github/google/bumble/remotehci/HciServer.java

@@ -42,6 +42,7 @@ 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);

setup.cfg

@@ -56,6 +56,7 @@ install_requires =
 
 [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-gatt-dump = bumble.apps.gatt_dump:main

tests/bap_test.py

@@ -17,6 +17,7 @@
 # -----------------------------------------------------------------------------
 import asyncio
 import os
+import functools
 import pytest
 import logging
 
@@ -24,15 +25,31 @@ from bumble import device
 from bumble.hci import CodecID, CodingFormat
 from bumble.profiles.bap import (
     AudioLocation,
+    AseStateMachine,
+    ASE_Operation,
+    ASE_Config_Codec,
+    ASE_Config_QOS,
+    ASE_Disable,
+    ASE_Enable,
+    ASE_Receiver_Start_Ready,
+    ASE_Receiver_Stop_Ready,
+    ASE_Release,
+    ASE_Update_Metadata,
     SupportedFrameDuration,
     SupportedSamplingFrequency,
+    SamplingFrequency,
+    FrameDuration,
     CodecSpecificCapabilities,
+    CodecSpecificConfiguration,
     ContextType,
     PacRecord,
+    AudioStreamControlService,
+    AudioStreamControlServiceProxy,
     PublishedAudioCapabilitiesService,
     PublishedAudioCapabilitiesServiceProxy,
 )
-from .test_utils import TwoDevices
+from tests.test_utils import TwoDevices
+
 
 # -----------------------------------------------------------------------------
 # Logging
@@ -40,6 +57,13 @@ from .test_utils import TwoDevices
 logger = logging.getLogger(__name__)
 
 
+# -----------------------------------------------------------------------------
+def basic_check(operation: ASE_Operation):
+    serialized = bytes(operation)
+    parsed = ASE_Operation.from_bytes(serialized)
+    assert bytes(parsed) == serialized
+
+
 # -----------------------------------------------------------------------------
 def test_codec_specific_capabilities() -> None:
     SAMPLE_FREQUENCY = SupportedSamplingFrequency.FREQ_16000
@@ -85,6 +109,92 @@ def test_vendor_specific_pac_record() -> None:
     assert bytes(PacRecord.from_bytes(RAW_DATA)) == RAW_DATA
 
 
+# -----------------------------------------------------------------------------
+def test_ASE_Config_Codec() -> None:
+    operation = ASE_Config_Codec(
+        ase_id=[1, 2],
+        target_latency=[3, 4],
+        target_phy=[5, 6],
+        codec_id=[CodingFormat(CodecID.LC3), CodingFormat(CodecID.LC3)],
+        codec_specific_configuration=[b'foo', b'bar'],
+    )
+    basic_check(operation)
+
+
+# -----------------------------------------------------------------------------
+def test_ASE_Config_QOS() -> None:
+    operation = ASE_Config_QOS(
+        ase_id=[1, 2],
+        cig_id=[1, 2],
+        cis_id=[3, 4],
+        sdu_interval=[5, 6],
+        framing=[0, 1],
+        phy=[2, 3],
+        max_sdu=[4, 5],
+        retransmission_number=[6, 7],
+        max_transport_latency=[8, 9],
+        presentation_delay=[10, 11],
+    )
+    basic_check(operation)
+
+
+# -----------------------------------------------------------------------------
+def test_ASE_Enable() -> None:
+    operation = ASE_Enable(
+        ase_id=[1, 2],
+        metadata=[b'foo', b'bar'],
+    )
+    basic_check(operation)
+
+
+# -----------------------------------------------------------------------------
+def test_ASE_Update_Metadata() -> None:
+    operation = ASE_Update_Metadata(
+        ase_id=[1, 2],
+        metadata=[b'foo', b'bar'],
+    )
+    basic_check(operation)
+
+
+# -----------------------------------------------------------------------------
+def test_ASE_Disable() -> None:
+    operation = ASE_Disable(ase_id=[1, 2])
+    basic_check(operation)
+
+
+# -----------------------------------------------------------------------------
+def test_ASE_Release() -> None:
+    operation = ASE_Release(ase_id=[1, 2])
+    basic_check(operation)
+
+
+# -----------------------------------------------------------------------------
+def test_ASE_Receiver_Start_Ready() -> None:
+    operation = ASE_Receiver_Start_Ready(ase_id=[1, 2])
+    basic_check(operation)
+
+
+# -----------------------------------------------------------------------------
+def test_ASE_Receiver_Stop_Ready() -> None:
+    operation = ASE_Receiver_Stop_Ready(ase_id=[1, 2])
+    basic_check(operation)
+
+
+# -----------------------------------------------------------------------------
+def test_codec_specific_configuration() -> None:
+    SAMPLE_FREQUENCY = SamplingFrequency.FREQ_16000
+    FRAME_SURATION = FrameDuration.DURATION_10000_US
+    AUDIO_LOCATION = AudioLocation.FRONT_LEFT
+    config = CodecSpecificConfiguration(
+        sampling_frequency=SAMPLE_FREQUENCY,
+        frame_duration=FRAME_SURATION,
+        audio_channel_allocation=AUDIO_LOCATION,
+        octets_per_codec_frame=60,
+        codec_frames_per_sdu=1,
+    )
+    assert CodecSpecificConfiguration.from_bytes(bytes(config)) == config
+
+
 # -----------------------------------------------------------------------------
 @pytest.mark.asyncio
 async def test_pacs():
@@ -140,6 +250,148 @@ async def test_pacs():
     )
 
 
+# -----------------------------------------------------------------------------
+@pytest.mark.asyncio
+async def test_ascs():
+    devices = TwoDevices()
+    devices[0].add_service(
+        AudioStreamControlService(device=devices[0], sink_ase_id=[1, 2])
+    )
+
+    await devices.setup_connection()
+    peer = device.Peer(devices.connections[1])
+    ascs_client = await peer.discover_service_and_create_proxy(
+        AudioStreamControlServiceProxy
+    )
+
+    notifications = {1: asyncio.Queue(), 2: asyncio.Queue()}
+
+    def on_notification(data: bytes, ase_id: int):
+        notifications[ase_id].put_nowait(data)
+
+    # Should be idle
+    assert await ascs_client.sink_ase[0].read_value() == bytes(
+        [1, AseStateMachine.State.IDLE]
+    )
+    assert await ascs_client.sink_ase[1].read_value() == bytes(
+        [2, AseStateMachine.State.IDLE]
+    )
+
+    # Subscribe
+    await ascs_client.sink_ase[0].subscribe(
+        functools.partial(on_notification, ase_id=1)
+    )
+    await ascs_client.sink_ase[1].subscribe(
+        functools.partial(on_notification, ase_id=2)
+    )
+
+    # Config Codec
+    config = CodecSpecificConfiguration(
+        sampling_frequency=SamplingFrequency.FREQ_48000,
+        frame_duration=FrameDuration.DURATION_10000_US,
+        audio_channel_allocation=AudioLocation.FRONT_LEFT,
+        octets_per_codec_frame=120,
+        codec_frames_per_sdu=1,
+    )
+    await ascs_client.ase_control_point.write_value(
+        ASE_Config_Codec(
+            ase_id=[1, 2],
+            target_latency=[3, 4],
+            target_phy=[5, 6],
+            codec_id=[CodingFormat(CodecID.LC3), CodingFormat(CodecID.LC3)],
+            codec_specific_configuration=[config, config],
+        )
+    )
+    assert (await notifications[1].get())[:2] == bytes(
+        [1, AseStateMachine.State.CODEC_CONFIGURED]
+    )
+    assert (await notifications[2].get())[:2] == bytes(
+        [2, AseStateMachine.State.CODEC_CONFIGURED]
+    )
+
+    # Config QOS
+    await ascs_client.ase_control_point.write_value(
+        ASE_Config_QOS(
+            ase_id=[1, 2],
+            cig_id=[1, 2],
+            cis_id=[3, 4],
+            sdu_interval=[5, 6],
+            framing=[0, 1],
+            phy=[2, 3],
+            max_sdu=[4, 5],
+            retransmission_number=[6, 7],
+            max_transport_latency=[8, 9],
+            presentation_delay=[10, 11],
+        )
+    )
+    assert (await notifications[1].get())[:2] == bytes(
+        [1, AseStateMachine.State.QOS_CONFIGURED]
+    )
+    assert (await notifications[2].get())[:2] == bytes(
+        [2, AseStateMachine.State.QOS_CONFIGURED]
+    )
+
+    # Enable
+    await ascs_client.ase_control_point.write_value(
+        ASE_Enable(
+            ase_id=[1, 2],
+            metadata=[b'foo', b'bar'],
+        )
+    )
+    assert (await notifications[1].get())[:2] == bytes(
+        [1, AseStateMachine.State.ENABLING]
+    )
+    assert (await notifications[2].get())[:2] == bytes(
+        [2, AseStateMachine.State.ENABLING]
+    )
+
+    # CIS establishment
+    devices[0].emit(
+        'cis_establishment',
+        device.CisLink(
+            device=devices[0],
+            acl_connection=devices.connections[0],
+            handle=5,
+            cis_id=3,
+            cig_id=1,
+        ),
+    )
+    devices[0].emit(
+        'cis_establishment',
+        device.CisLink(
+            device=devices[0],
+            acl_connection=devices.connections[0],
+            handle=6,
+            cis_id=4,
+            cig_id=2,
+        ),
+    )
+    assert (await notifications[1].get())[:2] == bytes(
+        [1, AseStateMachine.State.STREAMING]
+    )
+    assert (await notifications[2].get())[:2] == bytes(
+        [2, AseStateMachine.State.STREAMING]
+    )
+
+    # Release
+    await ascs_client.ase_control_point.write_value(
+        ASE_Release(
+            ase_id=[1, 2],
+            metadata=[b'foo', b'bar'],
+        )
+    )
+    assert (await notifications[1].get())[:2] == bytes(
+        [1, AseStateMachine.State.RELEASING]
+    )
+    assert (await notifications[2].get())[:2] == bytes(
+        [2, AseStateMachine.State.RELEASING]
+    )
+    assert (await notifications[1].get())[:2] == bytes([1, AseStateMachine.State.IDLE])
+    assert (await notifications[2].get())[:2] == bytes([2, AseStateMachine.State.IDLE])
+
+    await asyncio.sleep(0.001)
+
+
 # -----------------------------------------------------------------------------
 async def run():
     await test_pacs()

tests/cap_test.py

@@ -0,0 +1,71 @@
+# 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 os
+import pytest
+import logging
+
+from bumble import device
+from bumble import gatt
+from bumble.profiles import cap
+from bumble.profiles import csip
+from .test_utils import TwoDevices
+
+# -----------------------------------------------------------------------------
+# Logging
+# -----------------------------------------------------------------------------
+logger = logging.getLogger(__name__)
+
+
+# -----------------------------------------------------------------------------
+@pytest.mark.asyncio
+async def test_cas():
+    SIRK = bytes.fromhex('2f62c8ae41867d1bb619e788a2605faa')
+
+    devices = TwoDevices()
+    devices[0].add_service(
+        cap.CommonAudioServiceService(
+            csip.CoordinatedSetIdentificationService(
+                set_identity_resolving_key=SIRK,
+                set_identity_resolving_key_type=csip.SirkType.PLAINTEXT,
+            )
+        )
+    )
+
+    await devices.setup_connection()
+    peer = device.Peer(devices.connections[1])
+    cas_client = await peer.discover_service_and_create_proxy(
+        cap.CommonAudioServiceServiceProxy
+    )
+
+    included_services = await peer.discover_included_services(cas_client.service_proxy)
+    assert any(
+        service.uuid == gatt.GATT_COORDINATED_SET_IDENTIFICATION_SERVICE
+        for service in included_services
+    )
+
+
+# -----------------------------------------------------------------------------
+async def run():
+    await test_cas()
+
+
+# -----------------------------------------------------------------------------
+if __name__ == '__main__':
+    logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'INFO').upper())
+    asyncio.run(run())

tests/csip_test.py

@@ -20,6 +20,7 @@ import os
 import pytest
 import struct
 import logging
+from unittest import mock
 
 from bumble import device
 from bumble.profiles import csip
@@ -31,15 +32,55 @@ from .test_utils import TwoDevices
 logger = logging.getLogger(__name__)
 
 
+# -----------------------------------------------------------------------------
+def test_s1():
+    assert (
+        csip.s1(b'SIRKenc'[::-1])
+        == bytes.fromhex('6901983f 18149e82 3c7d133a 7d774572')[::-1]
+    )
+
+
+# -----------------------------------------------------------------------------
+def test_k1():
+    K = bytes.fromhex('676e1b9b d448696f 061ec622 3ce5ced9')[::-1]
+    SALT = csip.s1(b'SIRKenc'[::-1])
+    P = b'csis'[::-1]
+    assert (
+        csip.k1(K, SALT, P)
+        == bytes.fromhex('5277453c c094d982 b0e8ee53 2f2d1f8b')[::-1]
+    )
+
+
+# -----------------------------------------------------------------------------
+def test_sih():
+    SIRK = bytes.fromhex('457d7d09 21a1fd22 cecd8c86 dd72cccd')[::-1]
+    PRAND = bytes.fromhex('69f563')[::-1]
+    assert csip.sih(SIRK, PRAND) == bytes.fromhex('1948da')[::-1]
+
+
+# -----------------------------------------------------------------------------
+def test_sef():
+    SIRK = bytes.fromhex('457d7d09 21a1fd22 cecd8c86 dd72cccd')[::-1]
+    K = bytes.fromhex('676e1b9b d448696f 061ec622 3ce5ced9')[::-1]
+    assert (
+        csip.sef(K, SIRK) == bytes.fromhex('170a3835 e13524a0 7e2562d5 f25fd346')[::-1]
+    )
+
+
 # -----------------------------------------------------------------------------
 @pytest.mark.asyncio
-async def test_csis():
+@pytest.mark.parametrize(
+    'sirk_type,', [(csip.SirkType.ENCRYPTED), (csip.SirkType.PLAINTEXT)]
+)
+async def test_csis(sirk_type):
     SIRK = bytes.fromhex('2f62c8ae41867d1bb619e788a2605faa')
+    LTK = bytes.fromhex('2f62c8ae41867d1bb619e788a2605faa')
 
     devices = TwoDevices()
     devices[0].add_service(
         csip.CoordinatedSetIdentificationService(
             set_identity_resolving_key=SIRK,
+            set_identity_resolving_key_type=sirk_type,
             coordinated_set_size=2,
             set_member_lock=csip.MemberLock.UNLOCKED,
             set_member_rank=0,
@@ -47,15 +88,19 @@ async def test_csis():
     )
 
     await devices.setup_connection()
+
+    # Mock encryption.
+    devices.connections[0].encryption = 1
+    devices.connections[1].encryption = 1
+    devices[0].get_long_term_key = mock.AsyncMock(return_value=LTK)
+    devices[1].get_long_term_key = mock.AsyncMock(return_value=LTK)
+
     peer = device.Peer(devices.connections[1])
     csis_client = await peer.discover_service_and_create_proxy(
         csip.CoordinatedSetIdentificationProxy
     )
 
-    assert (
+    assert await csis_client.read_set_identity_resolving_key() == (sirk_type, SIRK)
-        await csis_client.set_identity_resolving_key.read_value()
-        == bytes([csip.SirkType.PLAINTEXT]) + SIRK
-    )
     assert await csis_client.coordinated_set_size.read_value() == struct.pack('B', 2)
     assert await csis_client.set_member_lock.read_value() == struct.pack(
         'B', csip.MemberLock.UNLOCKED
@@ -65,6 +110,7 @@ async def test_csis():
 
 # -----------------------------------------------------------------------------
 async def run():
+    test_sih()
     await test_csis()
 
 

tests/device_test.py

@@ -20,16 +20,23 @@ import logging
 import os
 from types import LambdaType
 import pytest
+from unittest import mock
 
-from bumble.core import BT_BR_EDR_TRANSPORT
+from bumble.core import (
+    BT_BR_EDR_TRANSPORT,
+    BT_LE_TRANSPORT,
+    BT_PERIPHERAL_ROLE,
+    ConnectionParameters,
+)
 from bumble.device import Connection, Device
-from bumble.host import Host
+from bumble.host import AclPacketQueue, Host
 from bumble.hci import (
     HCI_ACCEPT_CONNECTION_REQUEST_COMMAND,
     HCI_COMMAND_STATUS_PENDING,
     HCI_CREATE_CONNECTION_COMMAND,
     HCI_SUCCESS,
     Address,
+    OwnAddressType,
     HCI_Command_Complete_Event,
     HCI_Command_Status_Event,
     HCI_Connection_Complete_Event,
@@ -66,6 +73,13 @@ async def test_device_connect_parallel():
     d1 = Device(host=Host(None, None))
     d2 = Device(host=Host(None, None))
 
+    def _send(packet):
+        pass
+
+    d0.host.acl_packet_queue = AclPacketQueue(0, 0, _send)
+    d1.host.acl_packet_queue = AclPacketQueue(0, 0, _send)
+    d2.host.acl_packet_queue = AclPacketQueue(0, 0, _send)
+
     # enable classic
     d0.classic_enabled = True
     d1.classic_enabled = True
@@ -232,6 +246,172 @@ async def test_flush():
         pass
 
 
+# -----------------------------------------------------------------------------
+@pytest.mark.asyncio
+async def test_legacy_advertising():
+    device = Device(host=mock.AsyncMock(Host))
+
+    # Start advertising
+    advertiser = await device.start_legacy_advertising()
+    assert device.legacy_advertiser
+
+    # Stop advertising
+    await advertiser.stop()
+    assert not device.legacy_advertiser
+
+
+# -----------------------------------------------------------------------------
+@pytest.mark.parametrize(
+    'own_address_type,',
+    (OwnAddressType.PUBLIC, OwnAddressType.RANDOM),
+)
+@pytest.mark.asyncio
+async def test_legacy_advertising_connection(own_address_type):
+    device = Device(host=mock.AsyncMock(Host))
+    peer_address = Address('F0:F1:F2:F3:F4:F5')
+
+    # Start advertising
+    advertiser = await device.start_legacy_advertising()
+    device.on_connection(
+        0x0001,
+        BT_LE_TRANSPORT,
+        peer_address,
+        BT_PERIPHERAL_ROLE,
+        ConnectionParameters(0, 0, 0),
+    )
+
+    if own_address_type == OwnAddressType.PUBLIC:
+        assert device.lookup_connection(0x0001).self_address == device.public_address
+    else:
+        assert device.lookup_connection(0x0001).self_address == device.random_address
+
+    # For unknown reason, read_phy() in on_connection() would be killed at the end of
+    # test, so we force scheduling here to avoid an warning.
+    await asyncio.sleep(0.0001)
+
+
+# -----------------------------------------------------------------------------
+@pytest.mark.parametrize(
+    'auto_restart,',
+    (True, False),
+)
+@pytest.mark.asyncio
+async def test_legacy_advertising_disconnection(auto_restart):
+    device = Device(host=mock.AsyncMock(spec=Host))
+    peer_address = Address('F0:F1:F2:F3:F4:F5')
+    advertiser = await device.start_legacy_advertising(auto_restart=auto_restart)
+    device.on_connection(
+        0x0001,
+        BT_LE_TRANSPORT,
+        peer_address,
+        BT_PERIPHERAL_ROLE,
+        ConnectionParameters(0, 0, 0),
+    )
+
+    device.start_legacy_advertising = mock.AsyncMock()
+
+    device.on_disconnection(0x0001, 0)
+
+    if auto_restart:
+        device.start_legacy_advertising.assert_called_with(
+            advertising_type=advertiser.advertising_type,
+            own_address_type=advertiser.own_address_type,
+            auto_restart=advertiser.auto_restart,
+            advertising_data=advertiser.advertising_data,
+            scan_response_data=advertiser.scan_response_data,
+        )
+    else:
+        device.start_legacy_advertising.assert_not_called()
+
+
+# -----------------------------------------------------------------------------
+@pytest.mark.asyncio
+async def test_extended_advertising():
+    device = Device(host=mock.AsyncMock(Host))
+
+    # Start advertising
+    advertiser = await device.start_extended_advertising()
+    assert device.extended_advertisers
+
+    # Stop advertising
+    await advertiser.stop()
+    assert not device.extended_advertisers
+
+
+# -----------------------------------------------------------------------------
+@pytest.mark.parametrize(
+    'own_address_type,',
+    (OwnAddressType.PUBLIC, OwnAddressType.RANDOM),
+)
+@pytest.mark.asyncio
+async def test_extended_advertising_connection(own_address_type):
+    device = Device(host=mock.AsyncMock(spec=Host))
+    peer_address = Address('F0:F1:F2:F3:F4:F5')
+    advertiser = await device.start_extended_advertising(
+        own_address_type=own_address_type
+    )
+    device.on_connection(
+        0x0001,
+        BT_LE_TRANSPORT,
+        peer_address,
+        BT_PERIPHERAL_ROLE,
+        ConnectionParameters(0, 0, 0),
+    )
+    device.on_advertising_set_termination(
+        HCI_SUCCESS,
+        advertiser.handle,
+        0x0001,
+    )
+
+    if own_address_type == OwnAddressType.PUBLIC:
+        assert device.lookup_connection(0x0001).self_address == device.public_address
+    else:
+        assert device.lookup_connection(0x0001).self_address == device.random_address
+
+    # For unknown reason, read_phy() in on_connection() would be killed at the end of
+    # test, so we force scheduling here to avoid an warning.
+    await asyncio.sleep(0.0001)
+
+
+# -----------------------------------------------------------------------------
+@pytest.mark.parametrize(
+    'auto_restart,',
+    (True, False),
+)
+@pytest.mark.asyncio
+async def test_extended_advertising_disconnection(auto_restart):
+    device = Device(host=mock.AsyncMock(spec=Host))
+    peer_address = Address('F0:F1:F2:F3:F4:F5')
+    advertiser = await device.start_extended_advertising(auto_restart=auto_restart)
+    device.on_connection(
+        0x0001,
+        BT_LE_TRANSPORT,
+        peer_address,
+        BT_PERIPHERAL_ROLE,
+        ConnectionParameters(0, 0, 0),
+    )
+    device.on_advertising_set_termination(
+        HCI_SUCCESS,
+        advertiser.handle,
+        0x0001,
+    )
+
+    device.start_extended_advertising = mock.AsyncMock()
+
+    device.on_disconnection(0x0001, 0)
+
+    if auto_restart:
+        device.start_extended_advertising.assert_called_with(
+            advertising_properties=advertiser.advertising_properties,
+            own_address_type=advertiser.own_address_type,
+            auto_restart=advertiser.auto_restart,
+            advertising_data=advertiser.advertising_data,
+            scan_response_data=advertiser.scan_response_data,
+        )
+    else:
+        device.start_extended_advertising.assert_not_called()
+
+
 # -----------------------------------------------------------------------------
 def test_gatt_services_with_gas():
     device = Device(host=Host(None, None))

tests/gatt_test.py

@@ -20,11 +20,10 @@ import logging
 import os
 import struct
 import pytest
-from unittest.mock import Mock, ANY
+from unittest.mock import AsyncMock, Mock, ANY
 
 from bumble.controller import Controller
 from bumble.gatt_client import CharacteristicProxy
-from bumble.gatt_server import Server
 from bumble.link import LocalLink
 from bumble.device import Device, Peer
 from bumble.host import Host
@@ -120,9 +119,9 @@ async def test_characteristic_encoding():
         Characteristic.READABLE,
         123,
     )
-    x = c.read_value(None)
+    x = await c.read_value(None)
     assert x == bytes([123])
-    c.write_value(None, bytes([122]))
+    await c.write_value(None, bytes([122]))
     assert c.value == 122
 
     class FooProxy(CharacteristicProxy):
@@ -152,7 +151,22 @@ async def test_characteristic_encoding():
         bytes([123]),
     )
 
-    service = Service('3A657F47-D34F-46B3-B1EC-698E29B6B829', [characteristic])
+    async def async_read(connection):
+        return 0x05060708
+
+    async_characteristic = PackedCharacteristicAdapter(
+        Characteristic(
+            '2AB7E91B-43E8-4F73-AC3B-80C1683B47F9',
+            Characteristic.Properties.READ,
+            Characteristic.READABLE,
+            CharacteristicValue(read=async_read),
+        ),
+        '>I',
+    )
+
+    service = Service(
+        '3A657F47-D34F-46B3-B1EC-698E29B6B829', [characteristic, async_characteristic]
+    )
     server.add_service(service)
 
     await client.power_on()
@@ -184,6 +198,13 @@ async def test_characteristic_encoding():
     await async_barrier()
     assert characteristic.value == bytes([50])
 
+    c2 = peer.get_characteristics_by_uuid(async_characteristic.uuid)
+    assert len(c2) == 1
+    c2 = c2[0]
+    cd2 = PackedCharacteristicAdapter(c2, ">I")
+    cd2v = await cd2.read_value()
+    assert cd2v == 0x05060708
+
     last_change = None
 
     def on_change(value):
@@ -285,7 +306,8 @@ async def test_attribute_getters():
 
 
 # -----------------------------------------------------------------------------
-def test_CharacteristicAdapter():
+@pytest.mark.asyncio
+async def test_CharacteristicAdapter():
     # Check that the CharacteristicAdapter base class is transparent
     v = bytes([1, 2, 3])
     c = Characteristic(
@@ -296,11 +318,11 @@ def test_CharacteristicAdapter():
     )
     a = CharacteristicAdapter(c)
 
-    value = a.read_value(None)
+    value = await a.read_value(None)
     assert value == v
 
     v = bytes([3, 4, 5])
-    a.write_value(None, v)
+    await a.write_value(None, v)
     assert c.value == v
 
     # Simple delegated adapter
@@ -308,11 +330,11 @@ def test_CharacteristicAdapter():
         c, lambda x: bytes(reversed(x)), lambda x: bytes(reversed(x))
     )
 
-    value = a.read_value(None)
+    value = await a.read_value(None)
     assert value == bytes(reversed(v))
 
     v = bytes([3, 4, 5])
-    a.write_value(None, v)
+    await a.write_value(None, v)
     assert a.value == bytes(reversed(v))
 
     # Packed adapter with single element format
@@ -321,10 +343,10 @@ def test_CharacteristicAdapter():
     c.value = v
     a = PackedCharacteristicAdapter(c, '>H')
 
-    value = a.read_value(None)
+    value = await a.read_value(None)
     assert value == pv
     c.value = None
-    a.write_value(None, pv)
+    await a.write_value(None, pv)
     assert a.value == v
 
     # Packed adapter with multi-element format
@@ -334,10 +356,10 @@ def test_CharacteristicAdapter():
     c.value = (v1, v2)
     a = PackedCharacteristicAdapter(c, '>HH')
 
-    value = a.read_value(None)
+    value = await a.read_value(None)
     assert value == pv
     c.value = None
-    a.write_value(None, pv)
+    await a.write_value(None, pv)
     assert a.value == (v1, v2)
 
     # Mapped adapter
@@ -348,10 +370,10 @@ def test_CharacteristicAdapter():
     c.value = mapped
     a = MappedCharacteristicAdapter(c, '>HH', ('v1', 'v2'))
 
-    value = a.read_value(None)
+    value = await a.read_value(None)
     assert value == pv
     c.value = None
-    a.write_value(None, pv)
+    await a.write_value(None, pv)
     assert a.value == mapped
 
     # UTF-8 adapter
@@ -360,27 +382,49 @@ def test_CharacteristicAdapter():
     c.value = v
     a = UTF8CharacteristicAdapter(c)
 
-    value = a.read_value(None)
+    value = await a.read_value(None)
     assert value == ev
     c.value = None
-    a.write_value(None, ev)
+    await a.write_value(None, ev)
     assert a.value == v
 
 
 # -----------------------------------------------------------------------------
-def test_CharacteristicValue():
+@pytest.mark.asyncio
+async def test_CharacteristicValue():
     b = bytes([1, 2, 3])
-    c = CharacteristicValue(read=lambda _: b)
+
-    x = c.read(None)
+    async def read_value(connection):
+        return b
+
+    c = CharacteristicValue(read=read_value)
+    x = await c.read(None)
     assert x == b
 
-    result = []
+    m = Mock()
-    c = CharacteristicValue(
+    c = CharacteristicValue(write=m)
-        write=lambda connection, value: result.append((connection, value))
-    )
     z = object()
     c.write(z, b)
-    assert result == [(z, b)]
+    m.assert_called_once_with(z, b)
+
+
+# -----------------------------------------------------------------------------
+@pytest.mark.asyncio
+async def test_CharacteristicValue_async():
+    b = bytes([1, 2, 3])
+
+    async def read_value(connection):
+        return b
+
+    c = CharacteristicValue(read=read_value)
+    x = await c.read(None)
+    assert x == b
+
+    m = AsyncMock()
+    c = CharacteristicValue(write=m)
+    z = object()
+    await c.write(z, b)
+    m.assert_called_once_with(z, b)
 
 
 # -----------------------------------------------------------------------------
@@ -961,12 +1005,18 @@ Descriptor(handle=0x0009, type=UUID-16:2902 (Client Characteristic Configuration
 
 # -----------------------------------------------------------------------------
 async def async_main():
+    test_UUID()
+    test_ATT_Error_Response()
+    test_ATT_Read_By_Group_Type_Request()
     await test_read_write()
     await test_read_write2()
     await test_subscribe_notify()
     await test_unsubscribe()
     await test_characteristic_encoding()
     await test_mtu_exchange()
+    await test_CharacteristicValue()
+    await test_CharacteristicValue_async()
+    await test_CharacteristicAdapter()
 
 
 # -----------------------------------------------------------------------------
@@ -1105,9 +1155,4 @@ def test_get_attribute_group():
 # -----------------------------------------------------------------------------
 if __name__ == '__main__':
     logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'INFO').upper())
-    test_UUID()
-    test_ATT_Error_Response()
-    test_ATT_Read_By_Group_Type_Request()
-    test_CharacteristicValue()
-    test_CharacteristicAdapter()
     asyncio.run(async_main())