| /* |
| * Copyright (C) 2020 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; |
| |
| import android.os.Parcel; |
| |
| import java.net.Inet6Address; |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| |
| /** |
| * Collection of utilities to interact with {@link InetAddress} |
| * @hide |
| */ |
| public class InetAddressUtils { |
| |
| private static final int INET6_ADDR_LENGTH = 16; |
| |
| /** |
| * Writes an InetAddress to a parcel. The address may be null. This is likely faster than |
| * calling writeSerializable. |
| * @hide |
| */ |
| public static void parcelInetAddress(Parcel parcel, InetAddress address, int flags) { |
| byte[] addressArray = (address != null) ? address.getAddress() : null; |
| parcel.writeByteArray(addressArray); |
| if (address instanceof Inet6Address) { |
| final Inet6Address v6Address = (Inet6Address) address; |
| final boolean hasScopeId = v6Address.getScopeId() != 0; |
| parcel.writeBoolean(hasScopeId); |
| if (hasScopeId) parcel.writeInt(v6Address.getScopeId()); |
| } |
| |
| } |
| |
| /** |
| * Reads an InetAddress from a parcel. Returns null if the address that was written was null |
| * or if the data is invalid. |
| * @hide |
| */ |
| public static InetAddress unparcelInetAddress(Parcel in) { |
| byte[] addressArray = in.createByteArray(); |
| if (addressArray == null) { |
| return null; |
| } |
| |
| try { |
| if (addressArray.length == INET6_ADDR_LENGTH) { |
| final boolean hasScopeId = in.readBoolean(); |
| final int scopeId = hasScopeId ? in.readInt() : 0; |
| return Inet6Address.getByAddress(null /* host */, addressArray, scopeId); |
| } |
| |
| return InetAddress.getByAddress(addressArray); |
| } catch (UnknownHostException e) { |
| return null; |
| } |
| } |
| |
| private InetAddressUtils() {} |
| } |