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/*
* 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));
}
}
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