| Hansong Zhang | c229758 | 2019-09-20 14:14:01 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019 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 <cstdint> |
| 20 | |
| 21 | namespace bluetooth { |
| 22 | namespace l2cap { |
| 23 | |
| 24 | using Psm = uint16_t; |
| 25 | constexpr Psm kDefaultPsm = 0; // Invalid Psm as a default value |
| 26 | |
| 27 | constexpr bool IsPsmValid(Psm psm) { |
| Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 28 | // See Core spec 5.1 Vol 3 Part A 4.2 for definition |
| Hansong Zhang | c229758 | 2019-09-20 14:14:01 -0700 | [diff] [blame] | 29 | return (psm & 0x0101u) == 0x0001u; |
| 30 | } |
| 31 | |
| 32 | } // namespace l2cap |
| 33 | } // namespace bluetooth |