fix #354

Typing helper

bumble/device.py

@@ -23,6 +23,7 @@ import asyncio
 import logging
 from contextlib import asynccontextmanager, AsyncExitStack
 from dataclasses import dataclass
+from collections.abc import Iterable
 from typing import (
     Any,
     Callable,
@@ -32,6 +33,7 @@ from typing import (
     Optional,
     Tuple,
     Type,
+    TypeVar,
     Set,
     Union,
     cast,
@@ -440,8 +442,11 @@ class LePhyOptions:
 
 
 # -----------------------------------------------------------------------------
+_PROXY_CLASS = TypeVar('_PROXY_CLASS', bound=gatt_client.ProfileServiceProxy)
+
+
 class Peer:
-    def __init__(self, connection):
+    def __init__(self, connection: Connection) -> None:
         self.connection = connection
 
         # Create a GATT client for the connection
@@ -449,77 +454,113 @@ class Peer:
         connection.gatt_client = self.gatt_client
 
     @property
-    def services(self):
+    def services(self) -> List[gatt_client.ServiceProxy]:
         return self.gatt_client.services
 
-    async def request_mtu(self, mtu):
+    async def request_mtu(self, mtu: int) -> int:
         mtu = await self.gatt_client.request_mtu(mtu)
         self.connection.emit('connection_att_mtu_update')
         return mtu
 
-    async def discover_service(self, uuid):
+    async def discover_service(
+        self, uuid: Union[core.UUID, str]
+    ) -> List[gatt_client.ServiceProxy]:
         return await self.gatt_client.discover_service(uuid)
 
-    async def discover_services(self, uuids=()):
+    async def discover_services(
+        self, uuids: Iterable[core.UUID] = ()
+    ) -> List[gatt_client.ServiceProxy]:
         return await self.gatt_client.discover_services(uuids)
 
-    async def discover_included_services(self, service):
+    async def discover_included_services(
+        self, service: gatt_client.ServiceProxy
+    ) -> List[gatt_client.ServiceProxy]:
         return await self.gatt_client.discover_included_services(service)
 
-    async def discover_characteristics(self, uuids=(), service=None):
+    async def discover_characteristics(
+        self,
+        uuids: Iterable[Union[core.UUID, str]] = (),
+        service: Optional[gatt_client.ServiceProxy] = None,
+    ) -> List[gatt_client.CharacteristicProxy]:
         return await self.gatt_client.discover_characteristics(
             uuids=uuids, service=service
         )
 
     async def discover_descriptors(
-        self, characteristic=None, start_handle=None, end_handle=None
+        self,
+        characteristic: Optional[gatt_client.CharacteristicProxy] = None,
+        start_handle: Optional[int] = None,
+        end_handle: Optional[int] = None,
     ):
         return await self.gatt_client.discover_descriptors(
             characteristic, start_handle, end_handle
         )
 
-    async def discover_attributes(self):
+    async def discover_attributes(self) -> List[gatt_client.AttributeProxy]:
         return await self.gatt_client.discover_attributes()
 
-    async def subscribe(self, characteristic, subscriber=None, prefer_notify=True):
+    async def subscribe(
+        self,
+        characteristic: gatt_client.CharacteristicProxy,
+        subscriber: Optional[Callable[[bytes], Any]] = None,
+        prefer_notify: bool = True,
+    ) -> None:
         return await self.gatt_client.subscribe(
             characteristic, subscriber, prefer_notify
         )
 
-    async def unsubscribe(self, characteristic, subscriber=None):
+    async def unsubscribe(
+        self,
+        characteristic: gatt_client.CharacteristicProxy,
+        subscriber: Optional[Callable[[bytes], Any]] = None,
+    ) -> None:
         return await self.gatt_client.unsubscribe(characteristic, subscriber)
 
-    async def read_value(self, attribute):
+    async def read_value(
+        self, attribute: Union[int, gatt_client.AttributeProxy]
+    ) -> bytes:
         return await self.gatt_client.read_value(attribute)
 
-    async def write_value(self, attribute, value, with_response=False):
+    async def write_value(
+        self,
+        attribute: Union[int, gatt_client.AttributeProxy],
+        value: bytes,
+        with_response: bool = False,
+    ) -> None:
         return await self.gatt_client.write_value(attribute, value, with_response)
 
-    async def read_characteristics_by_uuid(self, uuid, service=None):
+    async def read_characteristics_by_uuid(
+        self, uuid: core.UUID, service: Optional[gatt_client.ServiceProxy] = None
+    ) -> List[bytes]:
         return await self.gatt_client.read_characteristics_by_uuid(uuid, service)
 
-    def get_services_by_uuid(self, uuid):
+    def get_services_by_uuid(self, uuid: core.UUID) -> List[gatt_client.ServiceProxy]:
         return self.gatt_client.get_services_by_uuid(uuid)
 
-    def get_characteristics_by_uuid(self, uuid, service=None):
+    def get_characteristics_by_uuid(
+        self, uuid: core.UUID, service: Optional[gatt_client.ServiceProxy] = None
+    ) -> List[gatt_client.CharacteristicProxy]:
         return self.gatt_client.get_characteristics_by_uuid(uuid, service)
 
-    def create_service_proxy(self, proxy_class):
-        return proxy_class.from_client(self.gatt_client)
+    def create_service_proxy(self, proxy_class: Type[_PROXY_CLASS]) -> _PROXY_CLASS:
+        return cast(_PROXY_CLASS, proxy_class.from_client(self.gatt_client))
 
-    async def discover_service_and_create_proxy(self, proxy_class):
+    async def discover_service_and_create_proxy(
+        self, proxy_class: Type[_PROXY_CLASS]
+    ) -> Optional[_PROXY_CLASS]:
         # Discover the first matching service and its characteristics
         services = await self.discover_service(proxy_class.SERVICE_CLASS.UUID)
         if services:
             service = services[0]
             await service.discover_characteristics()
             return self.create_service_proxy(proxy_class)
+        return None
 
-    async def sustain(self, timeout=None):
+    async def sustain(self, timeout: Optional[float] = None) -> None:
         await self.connection.sustain(timeout)
 
     # [Classic only]
-    async def request_name(self):
+    async def request_name(self) -> str:
         return await self.connection.request_remote_name()
 
     async def __aenter__(self):
@@ -532,7 +573,7 @@ class Peer:
     async def __aexit__(self, exc_type, exc_value, traceback):
         pass
 
-    def __str__(self):
+    def __str__(self) -> str:
         return f'{self.connection.peer_address} as {self.connection.role_name}'
 
 
@@ -732,7 +773,7 @@ class Connection(CompositeEventEmitter):
     async def switch_role(self, role: int) -> None:
         return await self.device.switch_role(self, role)
 
-    async def sustain(self, timeout=None):
+    async def sustain(self, timeout: Optional[float] = None) -> None:
         """Idles the current task waiting for a disconnect or timeout"""
 
         abort = asyncio.get_running_loop().create_future()

bumble/gatt.py

@@ -93,20 +93,35 @@ GATT_RECONNECTION_CONFIGURATION_SERVICE     = UUID.from_16_bits(0x1829, 'Reconne
 GATT_INSULIN_DELIVERY_SERVICE               = UUID.from_16_bits(0x183A, 'Insulin Delivery')
 GATT_BINARY_SENSOR_SERVICE                  = UUID.from_16_bits(0x183B, 'Binary Sensor')
 GATT_EMERGENCY_CONFIGURATION_SERVICE        = UUID.from_16_bits(0x183C, 'Emergency Configuration')
+GATT_AUTHORIZATION_CONTROL_SERVICE          = UUID.from_16_bits(0x183D, 'Authorization Control')
 GATT_PHYSICAL_ACTIVITY_MONITOR_SERVICE      = UUID.from_16_bits(0x183E, 'Physical Activity Monitor')
+GATT_ELAPSED_TIME_SERVICE                   = UUID.from_16_bits(0x183F, 'Elapsed Time')
+GATT_GENERIC_HEALTH_SENSOR_SERVICE          = UUID.from_16_bits(0x1840, 'Generic Health Sensor')
 GATT_AUDIO_INPUT_CONTROL_SERVICE            = UUID.from_16_bits(0x1843, 'Audio Input Control')
 GATT_VOLUME_CONTROL_SERVICE                 = UUID.from_16_bits(0x1844, 'Volume Control')
 GATT_VOLUME_OFFSET_CONTROL_SERVICE          = UUID.from_16_bits(0x1845, 'Volume Offset Control')
-GATT_COORDINATED_SET_IDENTIFICATION_SERVICE = UUID.from_16_bits(0x1846, 'Coordinated Set Identification Service')
+GATT_COORDINATED_SET_IDENTIFICATION_SERVICE = UUID.from_16_bits(0x1846, 'Coordinated Set Identification')
 GATT_DEVICE_TIME_SERVICE                    = UUID.from_16_bits(0x1847, 'Device Time')
-GATT_MEDIA_CONTROL_SERVICE                  = UUID.from_16_bits(0x1848, 'Media Control Service')
-GATT_GENERIC_MEDIA_CONTROL_SERVICE          = UUID.from_16_bits(0x1849, 'Generic Media Control Service')
+GATT_MEDIA_CONTROL_SERVICE                  = UUID.from_16_bits(0x1848, 'Media Control')
+GATT_GENERIC_MEDIA_CONTROL_SERVICE          = UUID.from_16_bits(0x1849, 'Generic Media Control')
 GATT_CONSTANT_TONE_EXTENSION_SERVICE        = UUID.from_16_bits(0x184A, 'Constant Tone Extension')
-GATT_TELEPHONE_BEARER_SERVICE               = UUID.from_16_bits(0x184B, 'Telephone Bearer Service')
-GATT_GENERIC_TELEPHONE_BEARER_SERVICE       = UUID.from_16_bits(0x184C, 'Generic Telephone Bearer Service')
+GATT_TELEPHONE_BEARER_SERVICE               = UUID.from_16_bits(0x184B, 'Telephone Bearer')
+GATT_GENERIC_TELEPHONE_BEARER_SERVICE       = UUID.from_16_bits(0x184C, 'Generic Telephone Bearer')
 GATT_MICROPHONE_CONTROL_SERVICE             = UUID.from_16_bits(0x184D, 'Microphone Control')
+GATT_AUDIO_STREAM_CONTROL_SERVICE           = UUID.from_16_bits(0x184E, 'Audio Stream Control')
+GATT_BROADCAST_AUDIO_SCAN_SERVICE           = UUID.from_16_bits(0x184F, 'Broadcast Audio Scan')
+GATT_PUBLISHED_AUDIO_CAPABILITIES_SERVICE   = UUID.from_16_bits(0x1850, 'Published Audio Capabilities')
+GATT_BASIC_AUDIO_ANNOUNCEMENT_SERVICE       = UUID.from_16_bits(0x1851, 'Basic Audio Announcement')
+GATT_BROADCAST_AUDIO_ANNOUNCEMENT_SERVICE   = UUID.from_16_bits(0x1852, 'Broadcast Audio Announcement')
+GATT_COMMON_AUDIO_SERVICE                   = UUID.from_16_bits(0x1853, 'Common Audio')
+GATT_HEARING_ACCESS_SERVICE                 = UUID.from_16_bits(0x1854, 'Hearing Access')
+GATT_TELEPHONY_AND_MEDIA_AUDIO_SERVICE      = UUID.from_16_bits(0x1855, 'Telephony and Media Audio')
+GATT_PUBLIC_BROADCAST_ANNOUNCEMENT_SERVICE  = UUID.from_16_bits(0x1856, 'Public Broadcast Announcement')
+GATT_ELECTRONIC_SHELF_LABEL_SERVICE         = UUID.from_16_bits(0X1857, 'Electronic Shelf Label')
+GATT_GAMING_AUDIO_SERVICE                   = UUID.from_16_bits(0x1858, 'Gaming Audio')
+GATT_MESH_PROXY_SOLICITATION_SERVICE        = UUID.from_16_bits(0x1859, 'Mesh Audio Solicitation')
 
-# Types
+# Attribute Types
 GATT_PRIMARY_SERVICE_ATTRIBUTE_TYPE   = UUID.from_16_bits(0x2800, 'Primary Service')
 GATT_SECONDARY_SERVICE_ATTRIBUTE_TYPE = UUID.from_16_bits(0x2801, 'Secondary Service')
 GATT_INCLUDE_ATTRIBUTE_TYPE           = UUID.from_16_bits(0x2802, 'Include')
@@ -129,6 +144,8 @@ GATT_ENVIRONMENTAL_SENSING_MEASUREMENT_DESCRIPTOR    = UUID.from_16_bits(0x290C,
 GATT_ENVIRONMENTAL_SENSING_TRIGGER_DESCRIPTOR        = UUID.from_16_bits(0x290D, 'Environmental Sensing Trigger Setting')
 GATT_TIME_TRIGGER_DESCRIPTOR                         = UUID.from_16_bits(0x290E, 'Time Trigger Setting')
 GATT_COMPLETE_BR_EDR_TRANSPORT_BLOCK_DATA_DESCRIPTOR = UUID.from_16_bits(0x290F, 'Complete BR-EDR Transport Block Data')
+GATT_OBSERVATION_SCHEDULE_DESCRIPTOR                 = UUID.from_16_bits(0x290F, 'Observation Schedule')
+GATT_VALID_RANGE_AND_ACCURACY_DESCRIPTOR             = UUID.from_16_bits(0x290F, 'Valid Range And Accuracy')
 
 # Device Information Service
 GATT_SYSTEM_ID_CHARACTERISTIC                          = UUID.from_16_bits(0x2A23, 'System ID')
@@ -156,6 +173,96 @@ GATT_HEART_RATE_CONTROL_POINT_CHARACTERISTIC = UUID.from_16_bits(0x2A39, 'Heart
 # Battery Service
 GATT_BATTERY_LEVEL_CHARACTERISTIC = UUID.from_16_bits(0x2A19, 'Battery Level')
 
+# Telephony And Media Audio Service (TMAS)
+GATT_TMAP_ROLE_CHARACTERISTIC = UUID.from_16_bits(0x2B51, 'TMAP Role')
+
+# Audio Input Control Service (AICS)
+GATT_AUDIO_INPUT_STATE_CHARACTERISTIC         = UUID.from_16_bits(0x2B77, 'Audio Input State')
+GATT_GAIN_SETTINGS_ATTRIBUTE_CHARACTERISTIC   = UUID.from_16_bits(0x2B78, 'Gain Settings Attribute')
+GATT_AUDIO_INPUT_TYPE_CHARACTERISTIC          = UUID.from_16_bits(0x2B79, 'Audio Input Type')
+GATT_AUDIO_INPUT_STATUS_CHARACTERISTIC        = UUID.from_16_bits(0x2B7A, 'Audio Input Status')
+GATT_AUDIO_INPUT_CONTROL_POINT_CHARACTERISTIC = UUID.from_16_bits(0x2B7B, 'Audio Input Control Point')
+GATT_AUDIO_INPUT_DESCRIPTION_CHARACTERISTIC   = UUID.from_16_bits(0x2B7C, 'Audio Input Description')
+
+# Volume Control Service (VCS)
+GATT_VOLUME_STATE_CHARACTERISTIC                = UUID.from_16_bits(0x2B7D, 'Volume State')
+GATT_VOLUME_CONTROL_POINT_CHARACTERISTIC        = UUID.from_16_bits(0x2B7E, 'Volume Control Point')
+GATT_VOLUME_FLAGS_CHARACTERISTIC                = UUID.from_16_bits(0x2B7F, 'Volume Flags')
+
+# Volume Offset Control Service (VOCS)
+GATT_VOLUME_OFFSET_STATE_CHARACTERISTIC         = UUID.from_16_bits(0x2B80, 'Volume Offset State')
+GATT_AUDIO_LOCATION_CHARACTERISTIC              = UUID.from_16_bits(0x2B81, 'Audio Location')
+GATT_VOLUME_OFFSET_CONTROL_POINT_CHARACTERISTIC = UUID.from_16_bits(0x2B82, 'Volume Offset Control Point')
+GATT_AUDIO_OUTPUT_DESCRIPTION_CHARACTERISTIC    = UUID.from_16_bits(0x2B83, 'Audio Output Description')
+
+# Coordinated Set Identification Service (CSIS)
+GATT_SET_IDENTITY_RESOLVING_KEY_CHARACTERISTIC  = UUID.from_16_bits(0x2B84, 'Set Identity Resolving Key')
+GATT_COORDINATED_SET_SIZE_CHARACTERISTIC        = UUID.from_16_bits(0x2B85, 'Coordinated Set Size')
+GATT_SET_MEMBER_LOCK_CHARACTERISTIC             = UUID.from_16_bits(0x2B86, 'Set Member Lock')
+GATT_SET_MEMBER_RANK_CHARACTERISTIC             = UUID.from_16_bits(0x2B87, 'Set Member Rank')
+
+# Media Control Service (MCS)
+GATT_MEDIA_PLAYER_NAME_CHARACTERISTIC                     = UUID.from_16_bits(0x2B93, 'Media Player Name')
+GATT_MEDIA_PLAYER_ICON_OBJECT_ID_CHARACTERISTIC           = UUID.from_16_bits(0x2B94, 'Media Player Icon Object ID')
+GATT_MEDIA_PLAYER_ICON_URL_CHARACTERISTIC                 = UUID.from_16_bits(0x2B95, 'Media Player Icon URL')
+GATT_TRACK_CHANGED_CHARACTERISTIC                         = UUID.from_16_bits(0x2B96, 'Track Changed')
+GATT_TRACK_TITLE_CHARACTERISTIC                           = UUID.from_16_bits(0x2B97, 'Track Title')
+GATT_TRACK_DURATION_CHARACTERISTIC                        = UUID.from_16_bits(0x2B98, 'Track Duration')
+GATT_TRACK_POSITION_CHARACTERISTIC                        = UUID.from_16_bits(0x2B99, 'Track Position')
+GATT_PLAYBACK_SPEED_CHARACTERISTIC                        = UUID.from_16_bits(0x2B9A, 'Playback Speed')
+GATT_SEEKING_SPEED_CHARACTERISTIC                         = UUID.from_16_bits(0x2B9B, 'Seeking Speed')
+GATT_CURRENT_TRACK_SEGMENTS_OBJECT_ID_CHARACTERISTIC      = UUID.from_16_bits(0x2B9C, 'Current Track Segments Object ID')
+GATT_CURRENT_TRACK_OBJECT_ID_CHARACTERISTIC               = UUID.from_16_bits(0x2B9D, 'Current Track Object ID')
+GATT_NEXT_TRACK_OBJECT_ID_CHARACTERISTIC                  = UUID.from_16_bits(0x2B9E, 'Next Track Object ID')
+GATT_PARENT_GROUP_OBJECT_ID_CHARACTERISTIC                = UUID.from_16_bits(0x2B9F, 'Parent Group Object ID')
+GATT_CURRENT_GROUP_OBJECT_ID_CHARACTERISTIC               = UUID.from_16_bits(0x2BA0, 'Current Group Object ID')
+GATT_PLAYING_ORDER_CHARACTERISTIC                         = UUID.from_16_bits(0x2BA1, 'Playing Order')
+GATT_PLAYING_ORDERS_SUPPORTED_CHARACTERISTIC              = UUID.from_16_bits(0x2BA2, 'Playing Orders Supported')
+GATT_MEDIA_STATE_CHARACTERISTIC                           = UUID.from_16_bits(0x2BA3, 'Media State')
+GATT_MEDIA_CONTROL_POINT_CHARACTERISTIC                   = UUID.from_16_bits(0x2BA4, 'Media Control Point')
+GATT_MEDIA_CONTROL_POINT_OPCODES_SUPPORTED_CHARACTERISTIC = UUID.from_16_bits(0x2BA5, 'Media Control Point Opcodes Supported')
+GATT_SEARCH_RESULTS_OBJECT_ID_CHARACTERISTIC              = UUID.from_16_bits(0x2BA6, 'Search Results Object ID')
+GATT_SEARCH_CONTROL_POINT_CHARACTERISTIC                  = UUID.from_16_bits(0x2BA7, 'Search Control Point')
+GATT_CONTENT_CONTROL_ID_CHARACTERISTIC                    = UUID.from_16_bits(0x2BBA, 'Content Control Id')
+
+# Telephone Bearer Service (TBS)
+GATT_BEARER_PROVIDER_NAME_CHARACTERISTIC                      = UUID.from_16_bits(0x2BB4, 'Bearer Provider Name')
+GATT_BEARER_UCI_CHARACTERISTIC                                = UUID.from_16_bits(0x2BB5, 'Bearer UCI')
+GATT_BEARER_TECHNOLOGY_CHARACTERISTIC                         = UUID.from_16_bits(0x2BB6, 'Bearer Technology')
+GATT_BEARER_URI_SCHEMES_SUPPORTED_LIST_CHARACTERISTIC         = UUID.from_16_bits(0x2BB7, 'Bearer URI Schemes Supported List')
+GATT_BEARER_SIGNAL_STRENGTH_CHARACTERISTIC                    = UUID.from_16_bits(0x2BB8, 'Bearer Signal Strength')
+GATT_BEARER_SIGNAL_STRENGTH_REPORTING_INTERVAL_CHARACTERISTIC = UUID.from_16_bits(0x2BB9, 'Bearer Signal Strength Reporting Interval')
+GATT_BEARER_LIST_CURRENT_CALLS_CHARACTERISTIC                 = UUID.from_16_bits(0x2BBA, 'Bearer List Current Calls')
+GATT_CONTENT_CONTROL_ID_CHARACTERISTIC                        = UUID.from_16_bits(0x2BBB, 'Content Control ID')
+GATT_STATUS_FLAGS_CHARACTERISTIC                              = UUID.from_16_bits(0x2BBC, 'Status Flags')
+GATT_INCOMING_CALL_TARGET_BEARER_URI_CHARACTERISTIC           = UUID.from_16_bits(0x2BBD, 'Incoming Call Target Bearer URI')
+GATT_CALL_STATE_CHARACTERISTIC                                = UUID.from_16_bits(0x2BBE, 'Call State')
+GATT_CALL_CONTROL_POINT_CHARACTERISTIC                        = UUID.from_16_bits(0x2BBF, 'Call Control Point')
+GATT_CALL_CONTROL_POINT_OPTIONAL_OPCODES_CHARACTERISTIC       = UUID.from_16_bits(0x2BC0, 'Call Control Point Optional Opcodes')
+GATT_TERMINATION_REASON_CHARACTERISTIC                        = UUID.from_16_bits(0x2BC1, 'Termination Reason')
+GATT_INCOMING_CALL_CHARACTERISTIC                             = UUID.from_16_bits(0x2BC2, 'Incoming Call')
+GATT_CALL_FRIENDLY_NAME_CHARACTERISTIC                        = UUID.from_16_bits(0x2BC3, 'Call Friendly Name')
+
+# Microphone Control Service (MICS)
+GATT_MUTE_CHARACTERISTIC = UUID.from_16_bits(0x2BC3, 'Mute')
+
+# Audio Stream Control Service (ASCS)
+GATT_SINK_ASE_CHARACTERISTIC                    = UUID.from_16_bits(0x2BC4, 'Sink ASE')
+GATT_SOURCE_ASE_CHARACTERISTIC                  = UUID.from_16_bits(0x2BC5, 'Source ASE')
+GATT_ASE_CONTROL_POINT_CHARACTERISTIC           = UUID.from_16_bits(0x2BC6, 'ASE Control Point')
+
+# Broadcast Audio Scan Service (BASS)
+GATT_BROADCAST_AUDIO_SCAN_CONTROL_POINT_CHARACTERISTIC = UUID.from_16_bits(0x2BC7, 'Broadcast Audio Scan Control Point')
+GATT_BROADCAST_RECEIVE_STATE_CHARACTERISTIC            = UUID.from_16_bits(0x2BC8, 'Broadcast Receive State')
+
+# Published Audio Capabilities Service (PACS)
+GATT_SINK_PAC_CHARACTERISTIC                    = UUID.from_16_bits(0x2BC9, 'Sink PAC')
+GATT_SINK_AUDIO_LOCATION_CHARACTERISTIC         = UUID.from_16_bits(0x2BCA, 'Sink Audio Location')
+GATT_SOURCE_PAC_CHARACTERISTIC                  = UUID.from_16_bits(0x2BCB, 'Source PAC')
+GATT_SOURCE_AUDIO_LOCATION_CHARACTERISTIC       = UUID.from_16_bits(0x2BCC, 'Source Audio Location')
+GATT_AVAILABLE_AUDIO_CONTEXTS_CHARACTERISTIC    = UUID.from_16_bits(0x2BCD, 'Available Audio Contexts')
+GATT_SUPPORTED_AUDIO_CONTEXTS_CHARACTERISTIC    = UUID.from_16_bits(0x2BCE, 'Supported Audio Contexts')
+
 # ASHA Service
 GATT_ASHA_SERVICE                             = UUID.from_16_bits(0xFDF0, 'Audio Streaming for Hearing Aid')
 GATT_ASHA_READ_ONLY_PROPERTIES_CHARACTERISTIC = UUID('6333651e-c481-4a3e-9169-7c902aad37bb', 'ReadOnlyProperties')
@@ -177,6 +284,9 @@ GATT_BOOT_KEYBOARD_INPUT_REPORT_CHARACTERISTIC                 = UUID.from_16_bi
 GATT_CURRENT_TIME_CHARACTERISTIC                               = UUID.from_16_bits(0x2A2B, 'Current Time')
 GATT_BOOT_KEYBOARD_OUTPUT_REPORT_CHARACTERISTIC                = UUID.from_16_bits(0x2A32, 'Boot Keyboard Output Report')
 GATT_CENTRAL_ADDRESS_RESOLUTION__CHARACTERISTIC                = UUID.from_16_bits(0x2AA6, 'Central Address Resolution')
+GATT_CLIENT_SUPPORTED_FEATURES_CHARACTERISTIC                  = UUID.from_16_bits(0x2B29, 'Client Supported Features')
+GATT_DATABASE_HASH_CHARACTERISTIC                              = UUID.from_16_bits(0x2B2A, 'Database Hash')
+GATT_SERVER_SUPPORTED_FEATURES_CHARACTERISTIC                  = UUID.from_16_bits(0x2B3A, 'Server Supported Features')
 
 # fmt: on
 # pylint: enable=line-too-long

bumble/gatt_client.py

@@ -38,6 +38,7 @@ from typing import (
     Any,
     Iterable,
     Type,
+    Set,
     TYPE_CHECKING,
 )
 
@@ -128,7 +129,7 @@ class ServiceProxy(AttributeProxy):
     included_services: List[ServiceProxy]
 
     @staticmethod
-    def from_client(service_class, client, service_uuid):
+    def from_client(service_class, client: Client, service_uuid: UUID):
         # The service and its characteristics are considered to have already been
         # discovered
         services = client.get_services_by_uuid(service_uuid)
@@ -206,11 +207,11 @@ class CharacteristicProxy(AttributeProxy):
 
         return await self.client.subscribe(self, subscriber, prefer_notify)
 
-    async def unsubscribe(self, subscriber=None):
+    async def unsubscribe(self, subscriber=None, force=False):
         if subscriber in self.subscribers:
             subscriber = self.subscribers.pop(subscriber)
 
-        return await self.client.unsubscribe(self, subscriber)
+        return await self.client.unsubscribe(self, subscriber, force)
 
     def __str__(self) -> str:
         return (
@@ -246,8 +247,12 @@ class ProfileServiceProxy:
 class Client:
     services: List[ServiceProxy]
     cached_values: Dict[int, Tuple[datetime, bytes]]
-    notification_subscribers: Dict[int, Callable[[bytes], Any]]
-    indication_subscribers: Dict[int, Callable[[bytes], Any]]
+    notification_subscribers: Dict[
+        int, Set[Union[CharacteristicProxy, Callable[[bytes], Any]]]
+    ]
+    indication_subscribers: Dict[
+        int, Set[Union[CharacteristicProxy, Callable[[bytes], Any]]]
+    ]
     pending_response: Optional[asyncio.futures.Future[ATT_PDU]]
     pending_request: Optional[ATT_PDU]
 
@@ -257,10 +262,8 @@ class Client:
         self.request_semaphore = asyncio.Semaphore(1)
         self.pending_request = None
         self.pending_response = None
-        self.notification_subscribers = (
-            {}
-        )  # Notification subscribers, by attribute handle
-        self.indication_subscribers = {}  # Indication subscribers, by attribute handle
+        self.notification_subscribers = {}  # Subscriber set, by attribute handle
+        self.indication_subscribers = {}  # Subscriber set, by attribute handle
         self.services = []
         self.cached_values = {}
 
@@ -682,8 +685,8 @@ class Client:
     async def discover_descriptors(
         self,
         characteristic: Optional[CharacteristicProxy] = None,
-        start_handle=None,
-        end_handle=None,
+        start_handle: Optional[int] = None,
+        end_handle: Optional[int] = None,
     ) -> List[DescriptorProxy]:
         '''
         See Vol 3, Part G - 4.7.1 Discover All Characteristic Descriptors
@@ -789,7 +792,12 @@ class Client:
 
         return attributes
 
-    async def subscribe(self, characteristic, subscriber=None, prefer_notify=True):
+    async def subscribe(
+        self,
+        characteristic: CharacteristicProxy,
+        subscriber: Optional[Callable[[bytes], Any]] = None,
+        prefer_notify: bool = True,
+    ) -> None:
         # If we haven't already discovered the descriptors for this characteristic,
         # do it now
         if not characteristic.descriptors_discovered:
@@ -826,6 +834,7 @@ class Client:
         subscriber_set = subscribers.setdefault(characteristic.handle, set())
         if subscriber is not None:
             subscriber_set.add(subscriber)
+
         # Add the characteristic as a subscriber, which will result in the
         # characteristic emitting an 'update' event when a notification or indication
         # is received
@@ -833,7 +842,18 @@ class Client:
 
         await self.write_value(cccd, struct.pack('<H', bits), with_response=True)
 
-    async def unsubscribe(self, characteristic, subscriber=None):
+    async def unsubscribe(
+        self,
+        characteristic: CharacteristicProxy,
+        subscriber: Optional[Callable[[bytes], Any]] = None,
+        force: bool = False,
+    ) -> None:
+        '''
+        Unsubscribe from a characteristic.
+
+        If `force` is True, this will write zeros to the CCCD when there are no
+        subscribers left, even if there were already no registered subscribers.
+        '''
         # If we haven't already discovered the descriptors for this characteristic,
         # do it now
         if not characteristic.descriptors_discovered:
@@ -847,31 +867,45 @@ class Client:
             logger.warning('unsubscribing from characteristic with no CCCD descriptor')
             return
 
+        # Check if the characteristic has subscribers
+        if not (
+            characteristic.handle in self.notification_subscribers
+            or characteristic.handle in self.indication_subscribers
+        ):
+            if not force:
+                return
+
+        # Remove the subscriber(s)
         if subscriber is not None:
             # Remove matching subscriber from subscriber sets
             for subscriber_set in (
                 self.notification_subscribers,
                 self.indication_subscribers,
             ):
-                subscribers = subscriber_set.get(characteristic.handle, [])
-                if subscriber in subscribers:
+                if (
+                    subscribers := subscriber_set.get(characteristic.handle)
+                ) and subscriber in subscribers:
                     subscribers.remove(subscriber)
 
                     # Cleanup if we removed the last one
                     if not subscribers:
                         del subscriber_set[characteristic.handle]
         else:
-            # Remove all subscribers for this attribute from the sets!
+            # Remove all subscribers for this attribute from the sets
             self.notification_subscribers.pop(characteristic.handle, None)
             self.indication_subscribers.pop(characteristic.handle, None)
 
-        if not self.notification_subscribers and not self.indication_subscribers:
+        # Update the CCCD
+        if not (
+            characteristic.handle in self.notification_subscribers
+            or characteristic.handle in self.indication_subscribers
+        ):
             # No more subscribers left
             await self.write_value(cccd, b'\x00\x00', with_response=True)
 
     async def read_value(
         self, attribute: Union[int, AttributeProxy], no_long_read: bool = False
-    ) -> Any:
+    ) -> bytes:
         '''
         See Vol 3, Part G - 4.8.1 Read Characteristic Value
 
@@ -1067,7 +1101,7 @@ class Client:
     def on_att_handle_value_notification(self, notification):
         # Call all subscribers
         subscribers = self.notification_subscribers.get(
-            notification.attribute_handle, []
+            notification.attribute_handle, set()
         )
         if not subscribers:
             logger.warning('!!! received notification with no subscriber')
@@ -1081,7 +1115,9 @@ class Client:
 
     def on_att_handle_value_indication(self, indication):
         # Call all subscribers
-        subscribers = self.indication_subscribers.get(indication.attribute_handle, [])
+        subscribers = self.indication_subscribers.get(
+            indication.attribute_handle, set()
+        )
         if not subscribers:
             logger.warning('!!! received indication with no subscriber')
 

bumble/hci.py

@@ -5296,6 +5296,10 @@ class HCI_Disconnection_Complete_Event(HCI_Event):
     See Bluetooth spec @ 7.7.5 Disconnection Complete Event
     '''
 
+    status: int
+    connection_handle: int
+    reason: int
+
 
 # -----------------------------------------------------------------------------
 @HCI_Event.event([('status', STATUS_SPEC), ('connection_handle', 2)])

bumble/helpers.py

@@ -15,30 +15,39 @@
 # -----------------------------------------------------------------------------
 # Imports
 # -----------------------------------------------------------------------------
+from __future__ import annotations
+
+from collections.abc import Callable, MutableMapping
+from typing import cast, Any
 import logging
 
-from .colors import color
-from .att import ATT_CID, ATT_PDU
-from .smp import SMP_CID, SMP_Command
-from .core import name_or_number
-from .l2cap import (
+from bumble import avdtp
+from bumble.colors import color
+from bumble.att import ATT_CID, ATT_PDU
+from bumble.smp import SMP_CID, SMP_Command
+from bumble.core import name_or_number
+from bumble.l2cap import (
     L2CAP_PDU,
     L2CAP_CONNECTION_REQUEST,
     L2CAP_CONNECTION_RESPONSE,
     L2CAP_SIGNALING_CID,
     L2CAP_LE_SIGNALING_CID,
     L2CAP_Control_Frame,
+    L2CAP_Connection_Request,
     L2CAP_Connection_Response,
 )
-from .hci import (
+from bumble.hci import (
     HCI_EVENT_PACKET,
     HCI_ACL_DATA_PACKET,
     HCI_DISCONNECTION_COMPLETE_EVENT,
     HCI_AclDataPacketAssembler,
+    HCI_Packet,
+    HCI_Event,
+    HCI_AclDataPacket,
+    HCI_Disconnection_Complete_Event,
 )
-from .rfcomm import RFCOMM_Frame, RFCOMM_PSM
-from .sdp import SDP_PDU, SDP_PSM
-from .avdtp import MessageAssembler as AVDTP_MessageAssembler, AVDTP_PSM
+from bumble.rfcomm import RFCOMM_Frame, RFCOMM_PSM
+from bumble.sdp import SDP_PDU, SDP_PSM
 
 # -----------------------------------------------------------------------------
 # Logging
@@ -50,23 +59,25 @@ logger = logging.getLogger(__name__)
 PSM_NAMES = {
     RFCOMM_PSM: 'RFCOMM',
     SDP_PSM: 'SDP',
-    AVDTP_PSM: 'AVDTP'
-    # TODO: add more PSM values
+    avdtp.AVDTP_PSM: 'AVDTP',
 }
 
 
 # -----------------------------------------------------------------------------
 class PacketTracer:
     class AclStream:
-        def __init__(self, analyzer):
+        psms: MutableMapping[int, int]
+        peer: PacketTracer.AclStream
+        avdtp_assemblers: MutableMapping[int, avdtp.MessageAssembler]
+
+        def __init__(self, analyzer: PacketTracer.Analyzer) -> None:
             self.analyzer = analyzer
             self.packet_assembler = HCI_AclDataPacketAssembler(self.on_acl_pdu)
             self.avdtp_assemblers = {}  # AVDTP assemblers, by source_cid
             self.psms = {}  # PSM, by source_cid
-            self.peer = None  # ACL stream in the other direction
 
         # pylint: disable=too-many-nested-blocks
-        def on_acl_pdu(self, pdu):
+        def on_acl_pdu(self, pdu: bytes) -> None:
             l2cap_pdu = L2CAP_PDU.from_bytes(pdu)
 
             if l2cap_pdu.cid == ATT_CID:
@@ -81,26 +92,30 @@ class PacketTracer:
 
                 # Check if this signals a new channel
                 if control_frame.code == L2CAP_CONNECTION_REQUEST:
-                    self.psms[control_frame.source_cid] = control_frame.psm
+                    connection_request = cast(L2CAP_Connection_Request, control_frame)
+                    self.psms[connection_request.source_cid] = connection_request.psm
                 elif control_frame.code == L2CAP_CONNECTION_RESPONSE:
+                    connection_response = cast(L2CAP_Connection_Response, control_frame)
                     if (
-                        control_frame.result
+                        connection_response.result
                         == L2CAP_Connection_Response.CONNECTION_SUCCESSFUL
                     ):
                         if self.peer:
-                            if psm := self.peer.psms.get(control_frame.source_cid):
+                            if psm := self.peer.psms.get(
+                                connection_response.source_cid
+                            ):
                                 # Found a pending connection
-                                self.psms[control_frame.destination_cid] = psm
+                                self.psms[connection_response.destination_cid] = psm
 
                                 # For AVDTP connections, create a packet assembler for
                                 # each direction
-                                if psm == AVDTP_PSM:
+                                if psm == avdtp.AVDTP_PSM:
                                     self.avdtp_assemblers[
-                                        control_frame.source_cid
-                                    ] = AVDTP_MessageAssembler(self.on_avdtp_message)
+                                        connection_response.source_cid
+                                    ] = avdtp.MessageAssembler(self.on_avdtp_message)
                                     self.peer.avdtp_assemblers[
-                                        control_frame.destination_cid
-                                    ] = AVDTP_MessageAssembler(
+                                        connection_response.destination_cid
+                                    ] = avdtp.MessageAssembler(
                                         self.peer.on_avdtp_message
                                     )
 
@@ -113,7 +128,7 @@ class PacketTracer:
                     elif psm == RFCOMM_PSM:
                         rfcomm_frame = RFCOMM_Frame.from_bytes(l2cap_pdu.payload)
                         self.analyzer.emit(rfcomm_frame)
-                    elif psm == AVDTP_PSM:
+                    elif psm == avdtp.AVDTP_PSM:
                         self.analyzer.emit(
                             f'{color("L2CAP", "green")} [CID={l2cap_pdu.cid}, '
                             f'PSM=AVDTP]: {l2cap_pdu.payload.hex()}'
@@ -130,22 +145,26 @@ class PacketTracer:
                 else:
                     self.analyzer.emit(l2cap_pdu)
 
-        def on_avdtp_message(self, transaction_label, message):
+        def on_avdtp_message(
+            self, transaction_label: int, message: avdtp.Message
+        ) -> None:
             self.analyzer.emit(
                 f'{color("AVDTP", "green")} [{transaction_label}] {message}'
             )
 
-        def feed_packet(self, packet):
+        def feed_packet(self, packet: HCI_AclDataPacket) -> None:
             self.packet_assembler.feed_packet(packet)
 
     class Analyzer:
-        def __init__(self, label, emit_message):
+        acl_streams: MutableMapping[int, PacketTracer.AclStream]
+        peer: PacketTracer.Analyzer
+
+        def __init__(self, label: str, emit_message: Callable[..., None]) -> None:
             self.label = label
             self.emit_message = emit_message
             self.acl_streams = {}  # ACL streams, by connection handle
-            self.peer = None  # Analyzer in the other direction
 
-        def start_acl_stream(self, connection_handle):
+        def start_acl_stream(self, connection_handle: int) -> PacketTracer.AclStream:
             logger.info(
                 f'[{self.label}] +++ Creating ACL stream for connection '
                 f'0x{connection_handle:04X}'
@@ -160,7 +179,7 @@ class PacketTracer:
 
             return stream
 
-        def end_acl_stream(self, connection_handle):
+        def end_acl_stream(self, connection_handle: int) -> None:
             if connection_handle in self.acl_streams:
                 logger.info(
                     f'[{self.label}] --- Removing ACL stream for connection '
@@ -171,23 +190,29 @@ class PacketTracer:
                 # Let the other forwarder know so it can cleanup its stream as well
                 self.peer.end_acl_stream(connection_handle)
 
-        def on_packet(self, packet):
+        def on_packet(self, packet: HCI_Packet) -> None:
             self.emit(packet)
 
             if packet.hci_packet_type == HCI_ACL_DATA_PACKET:
+                acl_packet = cast(HCI_AclDataPacket, packet)
                 # Look for an existing stream for this handle, create one if it is the
                 # first ACL packet for that connection handle
-                if (stream := self.acl_streams.get(packet.connection_handle)) is None:
-                    stream = self.start_acl_stream(packet.connection_handle)
-                stream.feed_packet(packet)
+                if (
+                    stream := self.acl_streams.get(acl_packet.connection_handle)
+                ) is None:
+                    stream = self.start_acl_stream(acl_packet.connection_handle)
+                stream.feed_packet(acl_packet)
             elif packet.hci_packet_type == HCI_EVENT_PACKET:
-                if packet.event_code == HCI_DISCONNECTION_COMPLETE_EVENT:
-                    self.end_acl_stream(packet.connection_handle)
+                event_packet = cast(HCI_Event, packet)
+                if event_packet.event_code == HCI_DISCONNECTION_COMPLETE_EVENT:
+                    self.end_acl_stream(
+                        cast(HCI_Disconnection_Complete_Event, packet).connection_handle
+                    )
 
-        def emit(self, message):
+        def emit(self, message: Any) -> None:
             self.emit_message(f'[{self.label}] {message}')
 
-    def trace(self, packet, direction=0):
+    def trace(self, packet: HCI_Packet, direction: int = 0) -> None:
         if direction == 0:
             self.host_to_controller_analyzer.on_packet(packet)
         else:
@@ -195,10 +220,10 @@ class PacketTracer:
 
     def __init__(
         self,
-        host_to_controller_label=color('HOST->CONTROLLER', 'blue'),
-        controller_to_host_label=color('CONTROLLER->HOST', 'cyan'),
-        emit_message=logger.info,
-    ):
+        host_to_controller_label: str = color('HOST->CONTROLLER', 'blue'),
+        controller_to_host_label: str = color('CONTROLLER->HOST', 'cyan'),
+        emit_message: Callable[..., None] = logger.info,
+    ) -> None:
         self.host_to_controller_analyzer = PacketTracer.Analyzer(
             host_to_controller_label, emit_message
         )

bumble/l2cap.py

@@ -391,6 +391,9 @@ class L2CAP_Connection_Request(L2CAP_Control_Frame):
     See Bluetooth spec @ Vol 3, Part A - 4.2 CONNECTION REQUEST
     '''
 
+    psm: int
+    source_cid: int
+
     @staticmethod
     def parse_psm(data: bytes, offset: int = 0) -> Tuple[int, int]:
         psm_length = 2
@@ -432,6 +435,11 @@ class L2CAP_Connection_Response(L2CAP_Control_Frame):
     See Bluetooth spec @ Vol 3, Part A - 4.3 CONNECTION RESPONSE
     '''
 
+    source_cid: int
+    destination_cid: int
+    status: int
+    result: int
+
     CONNECTION_SUCCESSFUL = 0x0000
     CONNECTION_PENDING = 0x0001
     CONNECTION_REFUSED_PSM_NOT_SUPPORTED = 0x0002

bumble/transport/common.py

@@ -150,7 +150,7 @@ class PacketParser:
                         try:
                             self.sink.on_packet(bytes(self.packet))
                         except Exception as error:
-                            logger.warning(
+                            logger.exception(
                                 color(f'!!! Exception in on_packet: {error}', 'red')
                             )
                     self.reset()

tests/gatt_test.py

@@ -20,6 +20,7 @@ import logging
 import os
 import struct
 import pytest
+from unittest.mock import Mock, ANY
 
 from bumble.controller import Controller
 from bumble.gatt_client import CharacteristicProxy
@@ -763,6 +764,83 @@ async def test_subscribe_notify():
     assert not c3._called_3
 
 
+# -----------------------------------------------------------------------------
+@pytest.mark.asyncio
+async def test_unsubscribe():
+    [client, server] = LinkedDevices().devices[:2]
+
+    characteristic1 = Characteristic(
+        'FDB159DB-036C-49E3-B3DB-6325AC750806',
+        Characteristic.Properties.READ | Characteristic.Properties.NOTIFY,
+        Characteristic.READABLE,
+        bytes([1, 2, 3]),
+    )
+    characteristic2 = Characteristic(
+        '3234C4F4-3F34-4616-8935-45A50EE05DEB',
+        Characteristic.Properties.READ | Characteristic.Properties.NOTIFY,
+        Characteristic.READABLE,
+        bytes([1, 2, 3]),
+    )
+
+    service1 = Service(
+        '3A657F47-D34F-46B3-B1EC-698E29B6B829',
+        [characteristic1, characteristic2],
+    )
+    server.add_services([service1])
+
+    mock1 = Mock()
+    characteristic1.on('subscription', mock1)
+    mock2 = Mock()
+    characteristic2.on('subscription', mock2)
+
+    await client.power_on()
+    await server.power_on()
+    connection = await client.connect(server.random_address)
+    peer = Peer(connection)
+
+    await peer.discover_services()
+    await peer.discover_characteristics()
+    c = peer.get_characteristics_by_uuid(characteristic1.uuid)
+    assert len(c) == 1
+    c1 = c[0]
+    c = peer.get_characteristics_by_uuid(characteristic2.uuid)
+    assert len(c) == 1
+    c2 = c[0]
+
+    await c1.subscribe()
+    await async_barrier()
+    mock1.assert_called_once_with(ANY, True, False)
+
+    await c2.subscribe()
+    await async_barrier()
+    mock2.assert_called_once_with(ANY, True, False)
+
+    mock1.reset_mock()
+    await c1.unsubscribe()
+    await async_barrier()
+    mock1.assert_called_once_with(ANY, False, False)
+
+    mock2.reset_mock()
+    await c2.unsubscribe()
+    await async_barrier()
+    mock2.assert_called_once_with(ANY, False, False)
+
+    mock1.reset_mock()
+    await c1.unsubscribe()
+    await async_barrier()
+    mock1.assert_not_called()
+
+    mock2.reset_mock()
+    await c2.unsubscribe()
+    await async_barrier()
+    mock2.assert_not_called()
+
+    mock1.reset_mock()
+    await c1.unsubscribe(force=True)
+    await async_barrier()
+    mock1.assert_called_once_with(ANY, False, False)
+
+
 # -----------------------------------------------------------------------------
 @pytest.mark.asyncio
 async def test_mtu_exchange():
@@ -886,6 +964,7 @@ async def async_main():
     await test_read_write()
     await test_read_write2()
     await test_subscribe_notify()
+    await test_unsubscribe()
     await test_characteristic_encoding()
     await test_mtu_exchange()