1 /* 2 * Copyright 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <bluetooth/log.h> 20 21 #include <cstdint> 22 23 class LeConnectionParameters { 24 public: 25 static constexpr uint16_t kAggressiveConnThreshold = 2; 26 static constexpr uint16_t kMinConnIntervalAggressive = 0x0008; // 8, *1.25 becomes 10ms 27 static constexpr uint16_t kMaxConnIntervalAggressive = 0x0010; // 16, *1.25 becomes 20ms 28 static constexpr uint16_t kMinConnIntervalRelaxed = 0x0018; // 24, *1.25 becomes 30ms 29 static constexpr uint16_t kMaxConnIntervalRelaxed = 0x0028; // 40, *1.25 becomes 50ms 30 31 static const std::string kPropertyAggressiveConnThreshold; 32 static const std::string kPropertyMinConnIntervalAggressive; 33 static const std::string kPropertyMaxConnIntervalAggressive; 34 static const std::string kPropertyMinConnIntervalRelaxed; 35 static const std::string kPropertyMaxConnIntervalRelaxed; 36 37 static void InitConnParamsWithSystemProperties(); 38 static uint32_t GetAggressiveConnThreshold(); 39 static uint32_t GetMinConnIntervalAggressive(); 40 static uint32_t GetMaxConnIntervalAggressive(); 41 static uint32_t GetMinConnIntervalRelaxed(); 42 static uint32_t GetMaxConnIntervalRelaxed(); 43 44 private: 45 static bool initialized; 46 static uint32_t aggressive_conn_threshold; 47 static uint32_t min_conn_interval_aggressive; 48 static uint32_t max_conn_interval_aggressive; 49 static uint32_t min_conn_interval_relaxed; 50 static uint32_t max_conn_interval_relaxed; 51 }; 52