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// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef PLATFORM_IMPL_LINUX_API_BLE_V2_SOCKET_ADAPTER_H_
#define PLATFORM_IMPL_LINUX_API_BLE_V2_SOCKET_ADAPTER_H_
#include <memory>
#include <string>
#include "absl/container/flat_hash_map.h"
#include "absl/synchronization/mutex.h"
#include "internal/platform/byte_array.h"
#include "internal/platform/implementation/ble_v2.h"
#include "internal/platform/implementation/linux/ble_v2_socket.h"
#include "internal/platform/uuid.h"
namespace nearby {
namespace linux {
// Helper class to adapt GATT server callbacks to socket data streams
// This wires up the ServerGattConnectionCallback to feed data into BleV2Socket
class BleV2SocketAdapter {
public:
BleV2SocketAdapter() = default;
~BleV2SocketAdapter() = default;
// Create GATT server callbacks that will route data to/from sockets
api::ble_v2::ServerGattConnectionCallback CreateServerCallbacks();
// Register a socket for a specific remote device
// When GATT writes come from this device, data is routed to this socket
void RegisterSocket(api::ble_v2::BlePeripheral::UniqueId device_id,
BleV2Socket* socket) ABSL_LOCKS_EXCLUDED(mutex_);
// Unregister a socket
void UnregisterSocket(api::ble_v2::BlePeripheral::UniqueId device_id)
ABSL_LOCKS_EXCLUDED(mutex_);
// Get the RX characteristic UUID (for receiving data from remote)
static Uuid GetRxCharacteristicUuid();
// Get the TX characteristic UUID (for sending data to remote)
static Uuid GetTxCharacteristicUuid();
private:
absl::Mutex mutex_;
// Map of device ID to socket for routing incoming GATT writes
absl::flat_hash_map<api::ble_v2::BlePeripheral::UniqueId, BleV2Socket*>
device_sockets_ ABSL_GUARDED_BY(mutex_);
};
} // namespace linux
} // namespace nearby
#endif // PLATFORM_IMPL_LINUX_API_BLE_V2_SOCKET_ADAPTER_H_