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initial linux nearby_sharing_service implementation. untested
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kidfromjupiter
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// Copyright 2025 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_SHARING_LINUX_NEARBY_SHARING_SERVICE_LINUX_H_
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#define THIRD_PARTY_NEARBY_SHARING_LINUX_NEARBY_SHARING_SERVICE_LINUX_H_
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#include <cstdint>
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#include <functional>
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#include <memory>
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#include <optional>
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#include <string>
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#include <unordered_map>
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#include <unordered_set>
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#include <vector>
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#include "absl/functional/any_invocable.h"
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#include "absl/strings/string_view.h"
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#include "absl/types/span.h"
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#include "connections/advertising_options.h"
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#include "connections/connection_options.h"
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#include "connections/core.h"
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#include "connections/discovery_options.h"
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#include "connections/implementation/service_controller_router.h"
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#include "connections/listeners.h"
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#include "connections/payload.h"
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#include "connections/status.h"
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#include "connections/strategy.h"
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#include "internal/platform/bluetooth_adapter.h"
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#include "internal/platform/clock_impl.h"
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#include "internal/platform/implementation/platform.h"
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#include "sharing/attachment_container.h"
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#include "sharing/nearby_sharing_service.h"
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#include "sharing/share_target.h"
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#include "sharing/share_target_discovered_callback.h"
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#include "sharing/transfer_metadata.h"
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#include "sharing/transfer_metadata_builder.h"
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namespace nearby::sharing::linux {
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class NearbySharingServiceLinux : public NearbySharingService {
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public:
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using StatusCodes = NearbySharingService::StatusCodes;
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NearbySharingServiceLinux();
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explicit NearbySharingServiceLinux(std::string device_name_override);
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~NearbySharingServiceLinux() override;
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void AddObserver(Observer* observer) override;
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void RemoveObserver(Observer* observer) override;
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void Shutdown(
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std::function<void(StatusCodes)> status_codes_callback) override;
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void RegisterSendSurface(
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TransferUpdateCallback* transfer_callback,
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ShareTargetDiscoveredCallback* discovery_callback, SendSurfaceState state,
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Advertisement::BlockedVendorId blocked_vendor_id,
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bool disable_wifi_hotspot,
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std::function<void(StatusCodes)> status_codes_callback) override;
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void UnregisterSendSurface(
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TransferUpdateCallback* transfer_callback,
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std::function<void(StatusCodes)> status_codes_callback) override;
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void RegisterReceiveSurface(
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TransferUpdateCallback* transfer_callback, ReceiveSurfaceState state,
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Advertisement::BlockedVendorId vendor_id,
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std::function<void(StatusCodes)> status_codes_callback) override;
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void UnregisterReceiveSurface(
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TransferUpdateCallback* transfer_callback,
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std::function<void(StatusCodes)> status_codes_callback) override;
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void ClearForegroundReceiveSurfaces(
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std::function<void(StatusCodes)> status_codes_callback) override;
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bool IsTransferring() const override;
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bool IsScanning() const override;
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bool IsBluetoothPresent() const override;
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bool IsBluetoothPowered() const override;
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bool IsExtendedAdvertisingSupported() const override;
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bool IsLanConnected() const override;
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std::string GetQrCodeUrl() const override;
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void SendAttachments(
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int64_t share_target_id,
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std::unique_ptr<nearby::sharing::AttachmentContainer>
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attachment_container,
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std::function<void(StatusCodes)> status_codes_callback) override;
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void Accept(int64_t share_target_id,
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std::function<void(StatusCodes status_codes)>
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status_codes_callback) override;
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void Reject(int64_t share_target_id,
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std::function<void(StatusCodes status_codes)>
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status_codes_callback) override;
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void Cancel(int64_t share_target_id,
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std::function<void(StatusCodes status_codes)>
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status_codes_callback) override;
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void SetVisibility(proto::DeviceVisibility visibility,
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absl::Duration expiration,
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absl::AnyInvocable<void(StatusCodes status_code) &&>
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callback) override;
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std::string Dump() const override;
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void UpdateFilePathsInProgress(bool update_file_paths) override;
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NearbyShareSettings* GetSettings() override;
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NearbyShareLocalDeviceDataManager* GetLocalDeviceDataManager() override;
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NearbyShareContactManager* GetContactManager() override;
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NearbyShareCertificateManager* GetCertificateManager() override;
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AccountManager* GetAccountManager() override;
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Clock& GetClock() override;
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void SetAlternateServiceUuidForDiscovery(
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uint16_t alternate_service_uuid) override;
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private:
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struct SendSurface {
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ShareTargetDiscoveredCallback* discovery_callback = nullptr;
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SendSurfaceState state = SendSurfaceState::kUnknown;
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bool disable_wifi_hotspot = false;
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};
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struct ReceiveSurface {
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ReceiveSurfaceState state = ReceiveSurfaceState::kUnknown;
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Advertisement::BlockedVendorId vendor_id =
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Advertisement::BlockedVendorId::kNone;
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};
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struct TransferState {
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nearby::sharing::AttachmentContainer attachments;
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TransferUpdateCallback* callback = nullptr;
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bool is_incoming = false;
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};
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struct ParsedAdvertisement {
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ShareTargetType device_type = ShareTargetType::kUnknown;
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std::optional<std::string> device_name;
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uint8_t vendor_id = 0;
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};
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void StartAdvertisingIfNeeded();
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void StopAdvertising();
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void StartDiscoveryIfNeeded();
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void StopDiscovery();
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std::vector<uint8_t> BuildAdvertisement(
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const std::optional<std::string>& device_name,
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ShareTargetType device_type, uint8_t vendor_id) const;
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std::optional<ParsedAdvertisement> ParseAdvertisement(
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absl::Span<const uint8_t> endpoint_info) const;
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void NotifyShareTargetDiscovered(const ShareTarget& share_target);
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void NotifyShareTargetUpdated(const ShareTarget& share_target);
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void NotifyShareTargetLost(const ShareTarget& share_target);
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void NotifyTransferUpdate(const ShareTarget& share_target,
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const TransferState& transfer_state,
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const TransferMetadata& metadata);
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TransferUpdateCallback* PickSendTransferCallback() const;
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TransferUpdateCallback* PickReceiveTransferCallback() const;
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std::optional<std::string> GetEndpointIdForTarget(
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int64_t share_target_id) const;
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std::optional<ShareTarget> GetShareTarget(
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absl::string_view endpoint_id) const;
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void HandleIncomingConnectionInitiated(
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const std::string& endpoint_id,
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const connections::ConnectionResponseInfo& info);
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void HandleOutgoingConnectionInitiated(
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const std::string& endpoint_id,
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const connections::ConnectionResponseInfo& info);
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void HandleConnectionAccepted(const std::string& endpoint_id,
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bool is_incoming);
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void HandleConnectionRejected(const std::string& endpoint_id,
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connections::Status status, bool is_incoming);
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void HandleConnectionDisconnected(const std::string& endpoint_id);
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connections::PayloadListener MakePayloadListener(bool is_incoming);
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StatusCodes StatusFromConnections(connections::Status status) const;
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std::string device_name_override_;
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std::unique_ptr<::nearby::api::DeviceInfo> device_info_;
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BluetoothAdapter bluetooth_adapter_;
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ClockImpl clock_;
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std::unique_ptr<connections::ServiceControllerRouter> router_;
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std::unique_ptr<connections::Core> core_;
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std::unordered_set<Observer*> observers_;
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std::unordered_map<TransferUpdateCallback*, SendSurface> send_surfaces_;
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std::unordered_map<TransferUpdateCallback*, ReceiveSurface> receive_surfaces_;
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std::unordered_map<std::string, ShareTarget> endpoint_to_target_;
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std::unordered_map<int64_t, std::string> target_id_to_endpoint_;
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std::unordered_map<std::string, TransferState> active_transfers_;
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std::optional<uint16_t> alternate_service_uuid_;
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bool is_scanning_ = false;
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bool is_advertising_ = false;
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bool is_transferring_ = false;
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int64_t next_share_target_id_ = 1;
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bool last_advertise_with_name_ = false;
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uint8_t last_advertise_vendor_id_ = 0;
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};
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} // namespace nearby::sharing::linux
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#endif // THIRD_PARTY_NEARBY_SHARING_LINUX_NEARBY_SHARING_SERVICE_LINUX_H_
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