mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-16 07:36:10 -04:00
Janusz Sobczak
a92abac83a
1. Update the API to accept the credentials on input instead of credential manager. 2. Update the test with values using the LDT encryption. These changes allow us to have a more asynchronous implementaion. When broadcasting we can: 1. Fetch the private credentials asynchronously. 2. Create the advertisement and start broadcasting when the credentials have been fetched. When scanning we can: 1. Fetch public credentials asynchronously. 2. Start scanning for advertisements. 3. Update the decoder when new credentials are fetched. PiperOrigin-RevId: 493998041
96 lines
3.6 KiB
C++
96 lines
3.6 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 THIRD_PARTY_NEARBY_PRESENCE_IMPLEMENTATION_SCAN_MANAGER_H_
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#define THIRD_PARTY_NEARBY_PRESENCE_IMPLEMENTATION_SCAN_MANAGER_H_
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#include <cstdint>
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#include <memory>
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#include <string>
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#include <utility>
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#include "absl/container/flat_hash_map.h"
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#include "absl/random/random.h"
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#include "internal/platform/single_thread_executor.h"
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#include "internal/proto/credential.pb.h"
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#include "presence/data_types.h"
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#include "presence/implementation/advertisement_decoder.h"
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#include "presence/implementation/credential_manager.h"
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#include "presence/implementation/mediums/mediums.h"
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#include "presence/scan_request.h"
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namespace nearby {
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namespace presence {
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// The instance of ScanManager is owned by `ServiceControllerImpl`.
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// Helping service controller to manage scan requests and callbacks.
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class ScanManager {
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public:
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using SingleThreadExecutor = ::location::nearby::SingleThreadExecutor;
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using Mutex = ::location::nearby::Mutex;
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using MutexLock = ::location::nearby::MutexLock;
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using ScanningSession =
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::location::nearby::api::ble_v2::BleMedium::ScanningSession;
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using Runnable = ::location::nearby::Runnable;
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using BleAdvertisementData =
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::location::nearby::api::ble_v2::BleAdvertisementData;
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using PublicCredential = ::nearby::internal::PublicCredential;
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using IdentityType = ::nearby::internal::IdentityType;
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ScanManager(Mediums& mediums, CredentialManager& credential_manager,
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SingleThreadExecutor& executor) {
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mediums_ = &mediums, credential_manager_ = &credential_manager;
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executor_ = &executor;
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}
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~ScanManager() = default;
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ScanSessionId StartScan(ScanRequest scan_request, ScanCallback cb);
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void StopScan(ScanSessionId session_id);
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// Below functions are test only.
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// Reference: go/totw/135#augmenting-the-public-api-for-tests
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int ScanningCallbacksLengthForTest();
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private:
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struct ScanSessionState {
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ScanRequest request;
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ScanCallback callback;
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absl::flat_hash_map<IdentityType, std::vector<PublicCredential>>
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credentials;
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AdvertisementDecoder decoder;
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std::unique_ptr<ScanningSession> scanning_session;
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};
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void NotifyFoundBle(ScanSessionId id, BleAdvertisementData data,
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absl::string_view remote_address)
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ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
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void FetchCredentials(ScanSessionId id, const ScanRequest& scan_request)
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ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
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void UpdateCredentials(ScanSessionId id, IdentityType identity_type,
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std::vector<PublicCredential> credentials)
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ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
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void RunOnServiceControllerThread(absl::string_view name, Runnable runnable) {
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executor_->Execute(std::string(name), std::move(runnable));
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}
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Mediums* mediums_;
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CredentialManager* credential_manager_;
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absl::flat_hash_map<ScanSessionId, ScanSessionState> scan_sessions_
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ABSL_GUARDED_BY(*executor_);
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SingleThreadExecutor* executor_;
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absl::BitGen bit_gen_;
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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_IMPLEMENTATION_SCAN_MANAGER_H_
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