| /* |
| * Copyright (C) 2023 The Android Open Source Project |
| * |
| * 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 |
| * |
| * http://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. |
| */ |
| |
| package com.android.net.module.util.wear; |
| |
| import com.android.net.module.util.async.ReadableByteBuffer; |
| |
| /** |
| * Implements utilities for decoding parts of TCP/UDP/IP headers. |
| * |
| * @hide |
| */ |
| final class NetPacketHelpers { |
| static void encodeNetworkUnsignedInt16(int value, byte[] dst, final int dstPos) { |
| dst[dstPos] = (byte) ((value >> 8) & 0xFF); |
| dst[dstPos + 1] = (byte) (value & 0xFF); |
| } |
| |
| static int decodeNetworkUnsignedInt16(byte[] data, final int pos) { |
| return ((data[pos] & 0xFF) << 8) | (data[pos + 1] & 0xFF); |
| } |
| |
| static int decodeNetworkUnsignedInt16(ReadableByteBuffer data, final int pos) { |
| return ((data.peek(pos) & 0xFF) << 8) | (data.peek(pos + 1) & 0xFF); |
| } |
| |
| private NetPacketHelpers() {} |
| } |