mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
Alexey Polyudov
c3a89bb894
Signed-off-by: Alexey Polyudov <apolyudov@google.com> Change-Id: I8ca8ef4727e289f3c6ea62ad73008ad718096e5d
110 lines
3.8 KiB
C++
110 lines
3.8 KiB
C++
// Copyright 2020 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 CORE_INTERNAL_BLE_ADVERTISEMENT_H_
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#define CORE_INTERNAL_BLE_ADVERTISEMENT_H_
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#include <cstdint>
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#include "core/internal/pcp.h"
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#include "platform/byte_array.h"
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#include "platform/port/string.h"
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#include "platform/ptr.h"
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namespace location {
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namespace nearby {
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namespace connections {
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// Represents the format of the Connections BLE Advertisement used in
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// Advertising + Discovery.
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//
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// <p>[VERSION][PCP][SERVICE_ID_HASH][ENDPOINT_ID][ENDPOINT_NAME_SIZE]
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// [ENDPOINT_NAME][BLUETOOTH_MAC]
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//
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// <p>See go/connections-ble-advertisement for more information.
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class BLEAdvertisement {
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public:
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// Versions of the BLEAdvertisement.
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struct Version {
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enum Value {
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V1 = 1,
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// Version is only allocated 3 bits in the BLEAdvertisement, so this
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// can never go beyond V7.
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};
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};
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static Ptr<BLEAdvertisement> fromBytes(
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ConstPtr<ByteArray> ble_advertisement_bytes);
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static ConstPtr<ByteArray> toBytes(Version::Value version, PCP::Value pcp,
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ConstPtr<ByteArray> service_id_hash,
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const std::string& endpoint_id,
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const std::string& endpoint_name,
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const std::string& bluetooth_mac_address);
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static const std::uint32_t kServiceIdHashLength;
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static const std::uint32_t kMinAdvertisementLength;
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// TODO(ahlee): Make sure names match for both Java and C++ implementations.
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static const std::uint32_t kMaxEndpointNameLength;
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~BLEAdvertisement();
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Version::Value getVersion() const;
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PCP::Value getPCP() const;
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ConstPtr<ByteArray> getServiceIdHash() const;
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std::string getEndpointId() const;
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std::string getEndpointName() const;
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std::string getBluetoothMacAddress() const;
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private:
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static std::string hexBytesToColonDelimitedString(
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ConstPtr<ByteArray> hex_bytes);
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// TODO(ahlee): Rename to bluetoothMacAddressHexStringToBytes
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static ConstPtr<ByteArray> bluetoothMacAddressToHexBytes(
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const std::string& bluetooth_mac_address);
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static std::uint32_t computeEndpointNameLength(
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ConstPtr<ByteArray> ble_advertisement_bytes);
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static std::uint32_t computeAdvertisementLength(
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const std::string& endpoint_name);
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static bool isBluetoothMacAddressUnset(
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ConstPtr<ByteArray> bluetooth_mac_address_bytes);
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static const std::uint32_t kVersionAndPcpLength;
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static const std::uint32_t kEndpointIdLength;
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static const std::uint32_t kEndpointNameSizeLength;
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static const std::uint32_t kBluetoothMacAddressLength;
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static const std::uint16_t kVersionBitmask;
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static const std::uint16_t kPCPBitmask;
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static const std::uint16_t kEndpointNameLengthBitmask;
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BLEAdvertisement(Version::Value version, PCP::Value pcp,
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ConstPtr<ByteArray> service_id_hash,
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const std::string& endpoint_id,
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const std::string& endpoint_name,
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const std::string& bluetooth_mac_address);
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const Version::Value version_;
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const PCP::Value pcp_;
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ScopedPtr<ConstPtr<ByteArray> > service_id_hash_;
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const std::string endpoint_id_;
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const std::string endpoint_name_;
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const std::string bluetooth_mac_address_;
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};
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} // namespace connections
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} // namespace nearby
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} // namespace location
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#endif // CORE_INTERNAL_BLE_ADVERTISEMENT_H_
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