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 <algorithm>
20 #include <limits>
21
22 #include "os/log.h"
23 #include "storage/classic_device.h"
24 #include "storage/config_cache_helper.h"
25 #include "storage/le_device.h"
26
27 namespace bluetooth {
28 namespace storage {
29
30 using hci::DeviceType;
31
32 namespace {
33 // TODO(siyuanh): also defined in storage/le_device.cc
34 const std::string kLeIdentityAddressKey = "LeIdentityAddr";
35 const std::string kLeLegacyPseudoAddr = "LeLegacyPseudoAddr";
36
GetConfigSection(ConfigCache * config,const hci::Address & key_address,Device::ConfigKeyAddressType key_address_type)37 std::string GetConfigSection(
38 ConfigCache* config, const hci::Address& key_address, Device::ConfigKeyAddressType key_address_type) {
39 ASSERT_LOG(config != nullptr, "config cannot be null");
40 ASSERT_LOG(!key_address.IsEmpty(), "key_address cannot be empty");
41 // assume lower case
42 auto key_address_string = key_address.ToString();
43 switch (key_address_type) {
44 case Device::ConfigKeyAddressType::LEGACY_KEY_ADDRESS:
45 case Device::ConfigKeyAddressType::CLASSIC_ADDRESS:
46 return key_address_string;
47 case Device::ConfigKeyAddressType::LE_IDENTITY_ADDRESS:
48 for (const auto& section_and_property : config->GetSectionNamesWithProperty(kLeIdentityAddressKey)) {
49 if (section_and_property.property == key_address_string) {
50 return section_and_property.section;
51 }
52 }
53 return key_address_string;
54 case Device::ConfigKeyAddressType::LE_LEGACY_PSEUDO_ADDRESS:
55 for (const auto& section_and_property : config->GetSectionNamesWithProperty(kLeLegacyPseudoAddr)) {
56 if (section_and_property.property == key_address_string) {
57 return section_and_property.section;
58 }
59 }
60 // One cannot create a new device just using LE legacy pseudo address
61 [[fallthrough]];
62 default:
63 LOG_ALWAYS_FATAL("Unknown key_address_type %d", static_cast<int>(key_address_type));
64 return "";
65 }
66 }
67
68 } // namespace
69
70 const std::unordered_set<std::string_view> Device::kLinkKeyProperties = {
71 "LinkKey", "LE_KEY_PENC", "LE_KEY_PID", "LE_KEY_PCSRK", "LE_KEY_LENC", "LE_KEY_LCSRK"};
72
Device(ConfigCache * config,ConfigCache * memory_only_config,const hci::Address & key_address,ConfigKeyAddressType key_address_type)73 Device::Device(
74 ConfigCache* config,
75 ConfigCache* memory_only_config,
76 const hci::Address& key_address,
77 ConfigKeyAddressType key_address_type)
78 : Device(config, memory_only_config, GetConfigSection(config, key_address, key_address_type)) {}
79
Device(ConfigCache * config,ConfigCache * memory_only_config,std::string section)80 Device::Device(ConfigCache* config, ConfigCache* memory_only_config, std::string section)
81 : config_(config), memory_only_config_(memory_only_config), section_(std::move(section)) {}
82
Exists()83 bool Device::Exists() {
84 return config_->HasSection(section_);
85 }
86
RemoveFromConfig()87 MutationEntry Device::RemoveFromConfig() {
88 return MutationEntry::Remove(MutationEntry::PropertyType::NORMAL, section_);
89 }
90
RemoveFromTempConfig()91 MutationEntry Device::RemoveFromTempConfig() {
92 return MutationEntry::Remove(MutationEntry::PropertyType::MEMORY_ONLY, section_);
93 }
94
Le()95 LeDevice Device::Le() {
96 auto device_type = GetDeviceType();
97 ASSERT(device_type);
98 ASSERT(device_type == DeviceType::LE || device_type == DeviceType::DUAL);
99 return LeDevice(config_, memory_only_config_, section_);
100 }
101
Classic()102 ClassicDevice Device::Classic() {
103 auto device_type = GetDeviceType();
104 ASSERT(device_type);
105 ASSERT(device_type == DeviceType::BR_EDR || device_type == DeviceType::DUAL);
106 return ClassicDevice(config_, memory_only_config_, section_);
107 }
108
GetAddress() const109 hci::Address Device::GetAddress() const {
110 // section name of a device is its address
111 auto addr = hci::Address::FromString(section_);
112 ASSERT(addr.has_value());
113 return addr.value();
114 }
115
ToLogString() const116 std::string Device::ToLogString() const {
117 return section_;
118 }
119
120 } // namespace storage
121 } // namespace bluetooth
122