1 /*
2 * Copyright 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "storage/device.h"
18
19 #include <bluetooth/log.h>
20
21 #include <algorithm>
22 #include <limits>
23
24 #include "os/log.h"
25 #include "storage/classic_device.h"
26 #include "storage/config_cache_helper.h"
27 #include "storage/le_device.h"
28
29 namespace bluetooth {
30 namespace storage {
31
32 using hci::DeviceType;
33
34 namespace {
35 // TODO(siyuanh): also defined in storage/le_device.cc
36 const std::string kLeIdentityAddressKey = "LeIdentityAddr";
37 const std::string kLeLegacyPseudoAddr = "LeLegacyPseudoAddr";
38
GetConfigSection(ConfigCache * config,const hci::Address & key_address,Device::ConfigKeyAddressType key_address_type)39 std::string GetConfigSection(
40 ConfigCache* config, const hci::Address& key_address, Device::ConfigKeyAddressType key_address_type) {
41 log::assert_that(config != nullptr, "config cannot be null");
42 log::assert_that(!key_address.IsEmpty(), "key_address cannot be empty");
43 // assume lower case
44 auto key_address_string = key_address.ToString();
45 switch (key_address_type) {
46 case Device::ConfigKeyAddressType::LEGACY_KEY_ADDRESS:
47 case Device::ConfigKeyAddressType::CLASSIC_ADDRESS:
48 return key_address_string;
49 case Device::ConfigKeyAddressType::LE_IDENTITY_ADDRESS:
50 for (const auto& section_and_property : config->GetSectionNamesWithProperty(kLeIdentityAddressKey)) {
51 if (section_and_property.property == key_address_string) {
52 return section_and_property.section;
53 }
54 }
55 return key_address_string;
56 case Device::ConfigKeyAddressType::LE_LEGACY_PSEUDO_ADDRESS:
57 for (const auto& section_and_property : config->GetSectionNamesWithProperty(kLeLegacyPseudoAddr)) {
58 if (section_and_property.property == key_address_string) {
59 return section_and_property.section;
60 }
61 }
62 // One cannot create a new device just using LE legacy pseudo address
63 [[fallthrough]];
64 default:
65 log::fatal("Unknown key_address_type {}", static_cast<int>(key_address_type));
66 return "";
67 }
68 }
69
70 } // namespace
71
72 const std::unordered_set<std::string_view> Device::kLinkKeyProperties = {
73 "LinkKey", "LE_KEY_PENC", "LE_KEY_PID", "LE_KEY_PCSRK", "LE_KEY_LENC", "LE_KEY_LCSRK"};
74
Device(ConfigCache * config,ConfigCache * memory_only_config,const hci::Address & key_address,ConfigKeyAddressType key_address_type)75 Device::Device(
76 ConfigCache* config,
77 ConfigCache* memory_only_config,
78 const hci::Address& key_address,
79 ConfigKeyAddressType key_address_type)
80 : Device(config, memory_only_config, GetConfigSection(config, key_address, key_address_type)) {}
81
Device(ConfigCache * config,ConfigCache * memory_only_config,std::string section)82 Device::Device(ConfigCache* config, ConfigCache* memory_only_config, std::string section)
83 : config_(config), memory_only_config_(memory_only_config), section_(std::move(section)) {}
84
Exists()85 bool Device::Exists() {
86 return config_->HasSection(section_);
87 }
88
RemoveFromConfig()89 MutationEntry Device::RemoveFromConfig() {
90 return MutationEntry::Remove(MutationEntry::PropertyType::NORMAL, section_);
91 }
92
RemoveFromTempConfig()93 MutationEntry Device::RemoveFromTempConfig() {
94 return MutationEntry::Remove(MutationEntry::PropertyType::MEMORY_ONLY, section_);
95 }
96
Le()97 LeDevice Device::Le() {
98 auto device_type = GetDeviceType();
99 log::assert_that(device_type.has_value(), "assert failed: device_type.has_value()");
100 log::assert_that(
101 device_type == DeviceType::LE || device_type == DeviceType::DUAL,
102 "assert failed: device_type == DeviceType::LE || device_type == DeviceType::DUAL");
103 return LeDevice(config_, memory_only_config_, section_);
104 }
105
Classic()106 ClassicDevice Device::Classic() {
107 auto device_type = GetDeviceType();
108 log::assert_that(device_type.has_value(), "assert failed: device_type.has_value()");
109 log::assert_that(
110 device_type == DeviceType::BR_EDR || device_type == DeviceType::DUAL,
111 "assert failed: device_type == DeviceType::BR_EDR || device_type == DeviceType::DUAL");
112 return ClassicDevice(config_, memory_only_config_, section_);
113 }
114
GetAddress() const115 hci::Address Device::GetAddress() const {
116 // section name of a device is its address
117 auto addr = hci::Address::FromString(section_);
118 log::assert_that(addr.has_value(), "assert failed: addr.has_value()");
119 return addr.value();
120 }
121
ToLogString() const122 std::string Device::ToLogString() const {
123 return section_;
124 }
125
126 } // namespace storage
127 } // namespace bluetooth
128