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
24namespace bluetooth {
25
26AdvertiseData::AdvertiseData(const std::vector<uint8_t>& data) : data_(data) {}
27
28AdvertiseData::AdvertiseData() {}
29
30AdvertiseData::AdvertiseData(const AdvertiseData& other) : data_(other.data_) {}
31
32bool AdvertiseData::IsValid() const {
33  size_t len = data_.size();
34
35  // Consider empty data as valid.
36  if (!len) return true;
37
38  for (size_t i = 0, field_len = 0; i < len; i += (field_len + 1)) {
39    field_len = data_[i];
40
41    // If the length of the current field would exceed the total data length,
42    // then the data is badly formatted.
43    if (i + field_len >= len) {
44      VLOG(1) << "Advertising data badly formatted";
45      return false;
46    }
47
48    // A field length of 0 would be invalid as it should at least contain the
49    // EIR field type.
50    if (field_len < 1) return false;
51
52    uint8_t type = data_[i + 1];
53
54    // Clients are not allowed to set the following EIR fields as these are
55    // managed by stack.
56    switch (type) {
57      case HCI_EIR_FLAGS_TYPE:
58      case HCI_EIR_OOB_BD_ADDR_TYPE:
59      case HCI_EIR_OOB_COD_TYPE:
60      case HCI_EIR_OOB_SSP_HASH_C_TYPE:
61      case HCI_EIR_OOB_SSP_RAND_R_TYPE:
62        VLOG(1) << "Cannot set EIR field type: " << type;
63        return false;
64      default:
65        break;
66    }
67  }
68
69  return true;
70}
71
72bool AdvertiseData::operator==(const AdvertiseData& rhs) const {
73  return data_ == rhs.data_;
74}
75
76AdvertiseData& AdvertiseData::operator=(const AdvertiseData& other) {
77  if (this == &other) return *this;
78
79  data_ = other.data_;
80  return *this;
81}
82
83}  // namespace bluetooth
84