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/*
* Copyright (C) 2018 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 android.net.netlink;
import static java.nio.ByteOrder.BIG_ENDIAN;
import java.net.Inet4Address;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* struct inet_diag_req_v2
*
* see <linux_src>/include/uapi/linux/inet_diag.h
*
* struct inet_diag_sockid {
* __be16 idiag_sport;
* __be16 idiag_dport;
* __be32 idiag_src[4];
* __be32 idiag_dst[4];
* __u32 idiag_if;
* __u32 idiag_cookie[2];
* #define INET_DIAG_NOCOOKIE (~0U)
* };
*
* @hide
*/
public class StructInetDiagSockId {
public static final int STRUCT_SIZE = 48;
private final InetSocketAddress mLocSocketAddress;
private final InetSocketAddress mRemSocketAddress;
private final byte[] INET_DIAG_NOCOOKIE = new byte[]{
(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff};
private final byte[] IPV4_PADDING = new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
public StructInetDiagSockId(InetSocketAddress loc, InetSocketAddress rem) {
mLocSocketAddress = loc;
mRemSocketAddress = rem;
}
public void pack(ByteBuffer byteBuffer) {
byteBuffer.order(BIG_ENDIAN);
byteBuffer.putShort((short) mLocSocketAddress.getPort());
byteBuffer.putShort((short) mRemSocketAddress.getPort());
byteBuffer.put(mLocSocketAddress.getAddress().getAddress());
if (mLocSocketAddress.getAddress() instanceof Inet4Address) {
byteBuffer.put(IPV4_PADDING);
}
byteBuffer.put(mRemSocketAddress.getAddress().getAddress());
if (mRemSocketAddress.getAddress() instanceof Inet4Address) {
byteBuffer.put(IPV4_PADDING);
}
byteBuffer.order(ByteOrder.nativeOrder());
byteBuffer.putInt(0);
byteBuffer.put(INET_DIAG_NOCOOKIE);
}
@Override
public String toString() {
return "StructInetDiagSockId{ "
+ "idiag_sport{" + mLocSocketAddress.getPort() + "}, "
+ "idiag_dport{" + mRemSocketAddress.getPort() + "}, "
+ "idiag_src{" + mLocSocketAddress.getAddress().getHostAddress() + "}, "
+ "idiag_dst{" + mRemSocketAddress.getAddress().getHostAddress() + "}, "
+ "idiag_if{" + 0 + "} "
+ "idiag_cookie{INET_DIAG_NOCOOKIE}"
+ "}";
}
}
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