Add DHCPv6 IA_PD option structure.
Bug: 260934173
Test: m
Change-Id: I890f9c651dc9089d463783725731903bd3969e4e
diff --git a/staticlibs/device/com/android/net/module/util/structs/IaPdOption.java b/staticlibs/device/com/android/net/module/util/structs/IaPdOption.java
new file mode 100644
index 0000000..5a09c40
--- /dev/null
+++ b/staticlibs/device/com/android/net/module/util/structs/IaPdOption.java
@@ -0,0 +1,81 @@
+/*
+ * 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 short code;
+ @Field(order = 1, type = Type.S16)
+ public short length;
+ @Field(order = 2, type = Type.U32)
+ public long id;
+ @Field(order = 3, type = Type.U32)
+ public long t1;
+ @Field(order = 4, type = Type.U32)
+ public 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));
+ }
+}