| /* |
| * 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.structs; |
| |
| import static com.android.net.module.util.NetworkStackConstants.DHCP6_OPTION_IA_PD; |
| |
| import com.android.net.module.util.Struct; |
| import com.android.net.module.util.Struct.Field; |
| import com.android.net.module.util.Struct.Type; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| |
| /** |
| * DHCPv6 IA_PD option. |
| * https://tools.ietf.org/html/rfc8415. This does not contain any option. |
| * |
| * 0 1 2 3 |
| * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | OPTION_IA_PD | option-len | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | IAID (4 octets) | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | T1 | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | T2 | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * . . |
| * . IA_PD-options . |
| * . . |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * |
| */ |
| public class IaPdOption extends Struct { |
| public static final int LENGTH = 12; // option length excluding IA_PD options |
| |
| @Field(order = 0, type = Type.S16) |
| public final short code; |
| @Field(order = 1, type = Type.S16) |
| public final short length; |
| @Field(order = 2, type = Type.U32) |
| public final long id; |
| @Field(order = 3, type = Type.U32) |
| public final long t1; |
| @Field(order = 4, type = Type.U32) |
| public final long t2; |
| |
| IaPdOption(final short code, final short length, final long id, final long t1, |
| final long t2) { |
| this.code = code; |
| this.length = length; |
| this.id = id; |
| this.t1 = t1; |
| this.t2 = t2; |
| } |
| |
| /** |
| * Build an IA_PD option from the required specific parameters. |
| */ |
| public static ByteBuffer build(final short length, final long id, final long t1, |
| final long t2) { |
| final IaPdOption option = new IaPdOption((short) DHCP6_OPTION_IA_PD, |
| length /* 12 + IA_PD options length */, id, t1, t2); |
| return ByteBuffer.wrap(option.writeToBytes(ByteOrder.BIG_ENDIAN)); |
| } |
| } |