Implement Hap support (#532)

* Implement Hap

bumble/att.py

@@ -23,6 +23,8 @@
 # Imports
 # -----------------------------------------------------------------------------
 from __future__ import annotations
+from bumble.utils import OpenIntEnum
+
 import enum
 import functools
 import inspect
@@ -211,6 +213,15 @@ class ErrorCode(utils.OpenIntEnum):
 # pylint: disable=invalid-name
 
 
+class CommonErrorCode(OpenIntEnum):
+    '''See Supplement to the Bluetooth Code Specification 1.2 List of Error Codes.'''
+
+    WRITE_REQUEST_REJECTED = 0xFC
+    CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR_IMPROPERLY_CONFIGURED = 0xFD
+    PROCEDURE_ALREADY_IN_PROGRESS = 0xFE
+    OUT_OF_RANGE = 0xFF
+
+
 # -----------------------------------------------------------------------------
 # Exceptions
 # -----------------------------------------------------------------------------

bumble/gatt.py

@@ -275,6 +275,11 @@
 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')
 
+# Hearing Access Service
+GATT_HEARING_AID_FEATURES_CHARACTERISTIC             = UUID.from_16_bits(0x2BDA, 'Hearing Aid Features')
+GATT_HEARING_AID_PRESET_CONTROL_POINT_CHARACTERISTIC = UUID.from_16_bits(0x2BDB, 'Hearing Aid Preset Control Point')
+GATT_ACTIVE_PRESET_INDEX_CHARACTERISTIC              = UUID.from_16_bits(0x2BDC, 'Active Preset Index')
+
 # 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')

bumble/gatt_server.py

@@ -915,7 +915,7 @@ async def on_att_write_request(self, connection, request):
         See Bluetooth spec Vol 3, Part F - 3.4.5.1 Write Request
         '''
 
-        # Check  that the attribute exists
+        # Check that the attribute exists
         attribute = self.get_attribute(request.attribute_handle)
         if attribute is None:
             self.send_response(