mirror of
https://github.com/kidfromjupiter/nearby.git
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Janusz Sobczak
02ffb5d45e
Define MessageStream class for exchanging messages betweek the seeker and the provider over rfcomm. PiperOrigin-RevId: 516986541
105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
// Copyright 2023 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_FASTPAIR_MESSAGE_STREAM_MESSAGE_STREAM_H_
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#define THIRD_PARTY_NEARBY_FASTPAIR_MESSAGE_STREAM_MESSAGE_STREAM_H_
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#include <memory>
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#include <utility>
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#include <vector>
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#include "absl/base/thread_annotations.h"
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#include "fastpair/message_stream/medium.h"
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#include "fastpair/message_stream/message.h"
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namespace nearby {
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namespace fastpair {
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class MessageStream : public Medium::Observer {
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public:
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class Observer {
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public:
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virtual ~Observer() = default;
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virtual void OnConnectionResult(absl::Status result) = 0;
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virtual void OnDisconnected(absl::Status status) = 0;
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// `void' callbacks don't send acknowledgements to the Provider.
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// 'bool' callbacks send ACK or NACK depending on the return value.
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virtual void OnEnableSilenceMode(bool enable) = 0;
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virtual void OnLogBufferFull() = 0;
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virtual void OnModelId(int model_id) = 0;
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virtual bool OnRing(uint8_t components, absl::Duration duration) = 0;
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};
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MessageStream(const FastPairDevice& device,
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std::optional<BluetoothClassicMedium*> bt_classic,
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Observer& observer);
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MessageStream(MessageStream&& other) = default;
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absl::Status OpenRfcomm();
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absl::Status OpenL2cap(absl::string_view ble_address);
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absl::Status Disconnect();
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// Asks the Provider for active components.
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// Returns the active components bitmap.
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Future<uint8_t> GetActiveComponents();
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absl::Status SendCapabilities(bool companion_app_installed,
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bool supports_silence_mode);
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// Asks the Provider to ring.
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// Returns true if the Provider replies with an ACK.
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Future<bool> Ring(uint8_t components, absl::Duration duration);
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// Medium::Observer
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void OnConnectionResult(absl::Status result) override;
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void OnDisconnected(absl::Status status) override;
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void OnReceived(Message message) override;
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private:
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// Notifies the caller that message {group, code} was handled by the provider
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// with the `result`.
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void FinishCall(MessageGroup group, MessageCode code, bool result);
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bool HandleBluetooth(const Message& message);
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bool HandleCompanionAppEvent(const Message& message);
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bool HandleDeviceActionEvent(const Message& message);
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bool HandleAcknowledgement(const Message& message);
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bool HandleDeviceInformationEvent(const Message& message);
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void SendAcknowledgement(const Message& message, bool ack);
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struct MessageWithAck {
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MessageGroup message_group;
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MessageCode message_code;
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Future<bool> future;
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};
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// A list of messages waiting for ACK/NACK.
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std::vector<MessageWithAck> waiting_for_ack_ ABSL_GUARDED_BY(mutex_);
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std::unique_ptr<Future<uint8_t>> get_active_components_request_
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ABSL_GUARDED_BY(mutex_);
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Mutex mutex_;
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Observer& observer_;
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Medium medium_;
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};
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} // namespace fastpair
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} // namespace nearby
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#endif // THIRD_PARTY_NEARBY_FASTPAIR_MESSAGE_STREAM_MESSAGE_STREAM_H_
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