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https://github.com/kidfromjupiter/nearby.git
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77 lines
3.0 KiB
C++
77 lines
3.0 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_BASE_BWU_HANDLER_H_
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#define CORE_INTERNAL_BASE_BWU_HANDLER_H_
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#include <memory>
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#include <string>
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#include "absl/container/flat_hash_map.h"
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#include "absl/strings/string_view.h"
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#include "connections/implementation/bwu_handler.h"
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#include "connections/implementation/endpoint_channel_manager.h"
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namespace nearby {
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namespace connections {
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// Manages the bookkeeping common to all medium handlers. Notably, it tracks all
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// of the service IDs and endpoint IDs that initiated a bandwidth upgrade.
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class BaseBwuHandler : public BwuHandler {
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public:
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explicit BaseBwuHandler(
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IncomingConnectionCallback incoming_connection_callback);
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// BwuHandler implementation:
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ByteArray InitializeUpgradedMediumForEndpoint(
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ClientProxy* client, const std::string& service_id,
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const std::string& endpoint_id) final;
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void RevertInitiatorState() final;
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void RevertInitiatorState(const std::string& upgrade_service_id,
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const std::string& endpoint_id) final;
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// If BWU Medium is Hotspot. The client needs to disconnect from Hotspot, then
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// it can restore the previous AP connection right away. The following method
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// is only for Hotspot Client
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void RevertResponderState(const std::string& service_id) final;
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protected:
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// Invoked by InitializeUpgradedMediumForEndpoint and RevertInitiatorState,
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// respectively, to handle medium-specific logic.
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// HandleRevertInitiatorStateForService is only invoked after the last
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// endpoint for the service is reverted.
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virtual ByteArray HandleInitializeUpgradedMediumForEndpoint(
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ClientProxy* client, const std::string& upgrade_service_id,
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const std::string& endpoint_id) = 0;
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virtual void HandleRevertInitiatorStateForService(
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const std::string& upgrade_service_id) = 0;
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// Notifies the caller about incoming connection.
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void NotifyOnIncomingConnection(
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ClientProxy* client,
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std::unique_ptr<IncomingSocketConnection> connection);
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private:
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IncomingConnectionCallback incoming_connection_callback_;
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// Map from the (wrapped) service ID to endpoint IDs that are initiating a
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// bandwidth upgrade. Not used for endpoints that respond to bandwidth upgrade
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// requests from another device.
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absl::flat_hash_map<std::string, absl::flat_hash_set<std::string>>
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upgrade_service_id_to_active_endpoint_ids_;
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};
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} // namespace connections
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} // namespace nearby
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#endif // CORE_INTERNAL_BASE_BWU_HANDLER_H_
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