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
|
/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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
*
* http://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.
*/
#include <cstddef>
#include <iostream>
#include <limits>
#include <random>
#include <android-base/logging.h>
#include <android-base/macros.h>
#include <private/android_filesystem_config.h>
#undef NAN
#include "wifi_iface_util.h"
namespace {
// Constants to set the local bit & clear the multicast bit.
constexpr uint8_t kMacAddressMulticastMask = 0x01;
constexpr uint8_t kMacAddressLocallyAssignedMask = 0x02;
} // namespace
namespace android {
namespace hardware {
namespace wifi {
namespace V1_3 {
namespace implementation {
namespace iface_util {
WifiIfaceUtil::WifiIfaceUtil(
const std::weak_ptr<wifi_system::InterfaceTool> iface_tool)
: iface_tool_(iface_tool),
random_mac_address_(nullptr),
event_handlers_map_() {}
std::array<uint8_t, 6> WifiIfaceUtil::getFactoryMacAddress(
const std::string& iface_name) {
return iface_tool_.lock()->GetFactoryMacAddress(iface_name.c_str());
}
bool WifiIfaceUtil::setMacAddress(const std::string& iface_name,
const std::array<uint8_t, 6>& mac) {
if (!iface_tool_.lock()->SetUpState(iface_name.c_str(), false)) {
LOG(ERROR) << "SetUpState(false) failed.";
return false;
}
if (!iface_tool_.lock()->SetMacAddress(iface_name.c_str(), mac)) {
LOG(ERROR) << "SetMacAddress failed.";
return false;
}
if (!iface_tool_.lock()->SetUpState(iface_name.c_str(), true)) {
LOG(ERROR) << "SetUpState(true) failed.";
return false;
}
IfaceEventHandlers event_handlers = {};
const auto it = event_handlers_map_.find(iface_name);
if (it != event_handlers_map_.end()) {
event_handlers = it->second;
}
if (event_handlers.on_state_toggle_off_on != nullptr) {
event_handlers.on_state_toggle_off_on(iface_name);
}
LOG(DEBUG) << "Successfully SetMacAddress.";
return true;
}
std::array<uint8_t, 6> WifiIfaceUtil::getOrCreateRandomMacAddress() {
if (random_mac_address_) {
return *random_mac_address_.get();
}
random_mac_address_ =
std::make_unique<std::array<uint8_t, 6>>(createRandomMacAddress());
return *random_mac_address_.get();
}
void WifiIfaceUtil::registerIfaceEventHandlers(const std::string& iface_name,
IfaceEventHandlers handlers) {
event_handlers_map_[iface_name] = handlers;
}
void WifiIfaceUtil::unregisterIfaceEventHandlers(
const std::string& iface_name) {
event_handlers_map_.erase(iface_name);
}
std::array<uint8_t, 6> WifiIfaceUtil::createRandomMacAddress() {
std::array<uint8_t, 6> address = {};
std::random_device rd;
std::default_random_engine engine(rd());
std::uniform_int_distribution<uint8_t> dist(
std::numeric_limits<uint8_t>::min(),
std::numeric_limits<uint8_t>::max());
for (size_t i = 0; i < address.size(); i++) {
address[i] = dist(engine);
}
// Set the local bit and clear the multicast bit.
address[0] |= kMacAddressLocallyAssignedMask;
address[0] &= ~kMacAddressMulticastMask;
return address;
}
} // namespace iface_util
} // namespace implementation
} // namespace V1_3
} // namespace wifi
} // namespace hardware
} // namespace android
|
