1 //
2 // Copyright (C) 2015 Google, Inc.
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 "service/common/bluetooth/advertise_data.h"
18
19 #include <base/logging.h>
20
21 #include "stack/include/bt_types.h"
22 #include "stack/include/hcidefs.h"
23
24 namespace bluetooth {
25
AdvertiseData(const std::vector<uint8_t> & data)26 AdvertiseData::AdvertiseData(const std::vector<uint8_t>& data)
27 : data_(data),
28 include_device_name_(false),
29 include_tx_power_level_(false) {
30 }
31
AdvertiseData()32 AdvertiseData::AdvertiseData()
33 : include_device_name_(false),
34 include_tx_power_level_(false) {
35 }
36
AdvertiseData(const AdvertiseData & other)37 AdvertiseData::AdvertiseData(const AdvertiseData& other)
38 : data_(other.data_),
39 include_device_name_(other.include_device_name_),
40 include_tx_power_level_(other.include_tx_power_level_) {
41 }
42
IsValid() const43 bool AdvertiseData::IsValid() const {
44 size_t len = data_.size();
45
46 // Consider empty data as valid.
47 if (!len)
48 return true;
49
50 for (size_t i = 0, field_len = 0; i < len; i += (field_len + 1)) {
51 field_len = data_[i];
52
53 // If the length of the current field would exceed the total data length,
54 // then the data is badly formatted.
55 if (i + field_len >= len) {
56 VLOG(1) << "Advertising data badly formatted";
57 return false;
58 }
59
60 // A field length of 0 would be invalid as it should at least contain the
61 // EIR field type.
62 if (field_len < 1)
63 return false;
64
65 uint8_t type = data_[i + 1];
66
67 // Clients are not allowed to set the following EIR fields as these are
68 // managed by stack.
69 switch (type) {
70 case HCI_EIR_FLAGS_TYPE:
71 case HCI_EIR_TX_POWER_LEVEL_TYPE:
72 case HCI_EIR_SHORTENED_LOCAL_NAME_TYPE:
73 case HCI_EIR_COMPLETE_LOCAL_NAME_TYPE:
74 case HCI_EIR_OOB_BD_ADDR_TYPE:
75 case HCI_EIR_OOB_COD_TYPE:
76 case HCI_EIR_OOB_SSP_HASH_C_TYPE:
77 case HCI_EIR_OOB_SSP_RAND_R_TYPE:
78 VLOG(1) << "Cannot set EIR field type: " << type;
79 return false;
80 default:
81 break;
82 }
83 }
84
85 return true;
86 }
87
operator ==(const AdvertiseData & rhs) const88 bool AdvertiseData::operator==(const AdvertiseData& rhs) const {
89 if (include_tx_power_level_ != rhs.include_tx_power_level_)
90 return false;
91
92 if (include_device_name_ != rhs.include_device_name_)
93 return false;
94
95 return data_ == rhs.data_;
96 }
97
operator =(const AdvertiseData & other)98 AdvertiseData& AdvertiseData::operator=(const AdvertiseData& other) {
99 if (this == &other)
100 return *this;
101
102 data_ = other.data_;
103 include_device_name_ = other.include_device_name_;
104 include_tx_power_level_ = other.include_tx_power_level_;
105
106 return *this;
107 }
108
109 } // namespace bluetooth
110