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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.netlink;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
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;
/**
* struct rta_cacheinfo
*
* see also:
*
* include/uapi/linux/rtnetlink.h
*
* @hide
*/
public class StructRtaCacheInfo extends Struct {
// Already aligned.
public static final int STRUCT_SIZE = 32;
@Field(order = 0, type = Type.U32)
public final long clntref;
@Field(order = 1, type = Type.U32)
public final long lastuse;
@Field(order = 2, type = Type.S32)
public final int expires;
@Field(order = 3, type = Type.U32)
public final long error;
@Field(order = 4, type = Type.U32)
public final long used;
@Field(order = 5, type = Type.U32)
public final long id;
@Field(order = 6, type = Type.U32)
public final long ts;
@Field(order = 7, type = Type.U32)
public final long tsage;
StructRtaCacheInfo(long clntref, long lastuse, int expires, long error, long used, long id,
long ts, long tsage) {
this.clntref = clntref;
this.lastuse = lastuse;
this.expires = expires;
this.error = error;
this.used = used;
this.id = id;
this.ts = ts;
this.tsage = tsage;
}
/**
* Parse an rta_cacheinfo struct from a {@link ByteBuffer}.
*
* @param byteBuffer The buffer from which to parse the rta_cacheinfo.
* @return the parsed rta_cacheinfo struct, or {@code null} if the rta_cacheinfo struct
* could not be parsed successfully (for example, if it was truncated).
*/
@Nullable
public static StructRtaCacheInfo parse(@NonNull final ByteBuffer byteBuffer) {
if (byteBuffer.remaining() < STRUCT_SIZE) return null;
// The ByteOrder must already have been set to native order.
return Struct.parse(StructRtaCacheInfo.class, byteBuffer);
}
/**
* Write a rta_cacheinfo struct to {@link ByteBuffer}.
*/
public void pack(@NonNull final ByteBuffer byteBuffer) {
// The ByteOrder must already have been set to native order.
this.writeToByteBuffer(byteBuffer);
}
}
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