1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
# Copyright 2021-2025 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
from __future__ import annotations
import pytest
from bumble import device, gatt
from bumble.profiles import gatt_service
from . import test_utils
# -----------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_database_hash():
devices = await test_utils.TwoDevices.create_with_connection()
devices[0].gatt_server.services.clear()
devices[0].gatt_server.attributes.clear()
devices[0].gatt_server.attributes_by_handle.clear()
devices[0].add_service(
gatt.Service(
gatt.GATT_GENERIC_ACCESS_SERVICE,
characteristics=[
gatt.Characteristic(
gatt.GATT_DEVICE_NAME_CHARACTERISTIC,
(
gatt.Characteristic.Properties.READ
| gatt.Characteristic.Properties.WRITE
),
gatt.Characteristic.Permissions.READ_REQUIRES_AUTHENTICATION,
),
gatt.Characteristic(
gatt.GATT_APPEARANCE_CHARACTERISTIC,
gatt.Characteristic.Properties.READ,
gatt.Characteristic.Permissions.READ_REQUIRES_AUTHENTICATION,
),
],
)
)
devices[0].add_service(
gatt_service.GenericAttributeProfileService(
server_supported_features=None,
database_hash_enabled=True,
service_change_enabled=True,
)
)
devices[0].gatt_server.add_attribute(
gatt.Service(gatt.GATT_GLUCOSE_SERVICE, characteristics=[])
)
# There is a special attribute order in the spec, so we need to add attribute one by
# one here.
battery_service = gatt.Service(
gatt.GATT_BATTERY_SERVICE,
characteristics=[
gatt.Characteristic(
gatt.GATT_BATTERY_LEVEL_CHARACTERISTIC,
properties=gatt.Characteristic.Properties.READ,
permissions=gatt.Characteristic.Permissions.READ_REQUIRES_AUTHENTICATION,
)
],
primary=False,
)
battery_service.handle = 0x0014
battery_service.end_group_handle = 0x0016
devices[0].gatt_server.add_attribute(
gatt.IncludedServiceDeclaration(battery_service)
)
c = gatt.Characteristic(
'2A18',
properties=(
gatt.Characteristic.Properties.READ
| gatt.Characteristic.Properties.INDICATE
| gatt.Characteristic.Properties.EXTENDED_PROPERTIES
),
permissions=gatt.Characteristic.Permissions.READ_REQUIRES_AUTHENTICATION,
)
devices[0].gatt_server.add_attribute(
gatt.CharacteristicDeclaration(c, devices[0].gatt_server.next_handle() + 1)
)
devices[0].gatt_server.add_attribute(c)
devices[0].gatt_server.add_attribute(
gatt.Descriptor(
gatt.GATT_CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR,
gatt.Descriptor.Permissions.READ_REQUIRES_AUTHENTICATION,
b'\x02\x00',
),
)
devices[0].gatt_server.add_attribute(
gatt.Descriptor(
gatt.GATT_CHARACTERISTIC_EXTENDED_PROPERTIES_DESCRIPTOR,
gatt.Descriptor.Permissions.READ_REQUIRES_AUTHENTICATION,
b'\x00\x00',
),
)
devices[0].add_service(battery_service)
peer = device.Peer(devices.connections[1])
client = await peer.discover_service_and_create_proxy(
gatt_service.GenericAttributeProfileServiceProxy
)
assert client.database_hash_characteristic
assert await client.database_hash_characteristic.read_value() == bytes.fromhex(
'F1CA2D48ECF58BAC8A8830BBB9FBA990'
)
# -----------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_service_changed():
devices = await test_utils.TwoDevices.create_with_connection()
assert (service := devices[0].gatt_service)
peer = device.Peer(devices.connections[1])
assert (
client := await peer.discover_service_and_create_proxy(
gatt_service.GenericAttributeProfileServiceProxy
)
)
assert client.service_changed_characteristic
indications = []
await client.service_changed_characteristic.subscribe(
indications.append, prefer_notify=False
)
await devices[0].indicate_subscribers(
service.service_changed_characteristic, b'1234'
)
await test_utils.async_barrier()
assert indications[0] == b'1234'
|
