mirror of
https://github.com/kidfromjupiter/nearby.git
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91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef THIRD_PARTY_NEARBY_PRESENCE_DATA_ELEMENT_H_
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#define THIRD_PARTY_NEARBY_PRESENCE_DATA_ELEMENT_H_
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#include <stdint.h>
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#include <ostream>
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#include <string>
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#include "absl/strings/escaping.h"
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#include "absl/strings/string_view.h"
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namespace nearby {
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namespace presence {
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// Reserved Action types when the field type is kActionFieldType
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namespace action {
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constexpr int kTapToTransferAction = 4;
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constexpr int kActiveUnlockAction = 8;
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constexpr int kNearbyShareAction = 9;
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constexpr int kFastPairAction = 10;
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constexpr int kFitCastAction = 11;
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} // namespace action
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/** Describes a custom Data element in NP advertisement. */
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class DataElement {
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public:
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// The field types listed below require special processing when generating and
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// parsing NP advertisements.
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static constexpr int kSaltFieldType = 0;
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static constexpr int kPrivateIdentityFieldType = 1;
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static constexpr int kTrustedIdentityFieldType = 2;
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static constexpr int kPublicIdentityFieldType = 3;
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static constexpr int kProvisionedIdentityFieldType = 4;
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static constexpr int kTxPowerFieldType = 5;
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static constexpr int kActionFieldType = 6;
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static constexpr int kModelIdFieldType = 7;
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static constexpr int kEddystoneIdFieldType = 8;
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static constexpr int kAccountKeyDataFieldType = 9;
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static constexpr int kConnectionStatusFieldType = 10;
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static constexpr int kBatteryFieldType = 11;
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static constexpr int kAdvertisementSignature = 12;
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static constexpr int kContextTimestampFieldType = 13;
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// Maximum allowed Data Element's value length
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static constexpr int kMaxDataElementLength = 15;
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// Maximum allowed Data Element's type
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static constexpr int kMaxDataElementType = 15;
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// The DE header is (length << kDataElementLengthShift | type)
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static constexpr int kDataElementLengthShift = 4;
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DataElement(uint16_t type, absl::string_view value)
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: type_(type), value_(value) {}
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DataElement(uint16_t type, uint8_t value)
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: type_(type),
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value_(reinterpret_cast<const char*>(&value), sizeof(value)) {}
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uint16_t GetType() const { return type_; }
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absl::string_view GetValue() const { return value_; }
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private:
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uint16_t type_;
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std::string value_;
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};
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inline bool operator==(const DataElement& i1, const DataElement& i2) {
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return i1.GetType() == i2.GetType() && i1.GetValue() == i2.GetValue();
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}
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inline std::ostream& operator<<(std::ostream& os, const DataElement& elem) {
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return os << "DataElement(" << elem.GetType() << ", "
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<< absl::BytesToHexString(elem.GetValue()) << ")";
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}
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} // namespace presence
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} // namespace nearby
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#endif // THIRD_PARTY_NEARBY_PRESENCE_DATA_ELEMENT_H_
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