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/*
* Copyright (C) 2020 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.bpf;
import android.net.MacAddress;
import androidx.annotation.NonNull;
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.net.Inet4Address;
import java.net.UnknownHostException;
import java.util.Objects;
/** Key type for downstream & upstream IPv4 forwarding maps. */
public class Tether4Key extends Struct {
@Field(order = 0, type = Type.U32)
public final long iif;
@Field(order = 1, type = Type.EUI48)
public final MacAddress dstMac;
@Field(order = 2, type = Type.U8, padding = 1)
public final short l4proto;
@Field(order = 3, type = Type.ByteArray, arraysize = 4)
public final byte[] src4;
@Field(order = 4, type = Type.ByteArray, arraysize = 4)
public final byte[] dst4;
@Field(order = 5, type = Type.UBE16)
public final int srcPort;
@Field(order = 6, type = Type.UBE16)
public final int dstPort;
public Tether4Key(final long iif, @NonNull final MacAddress dstMac, final short l4proto,
final byte[] src4, final byte[] dst4, final int srcPort,
final int dstPort) {
Objects.requireNonNull(dstMac);
this.iif = iif;
this.dstMac = dstMac;
this.l4proto = l4proto;
this.src4 = src4;
this.dst4 = dst4;
this.srcPort = srcPort;
this.dstPort = dstPort;
}
@Override
public String toString() {
try {
return String.format(
"iif: %d, dstMac: %s, l4proto: %d, src4: %s, dst4: %s, "
+ "srcPort: %d, dstPort: %d",
iif, dstMac, l4proto,
Inet4Address.getByAddress(src4), Inet4Address.getByAddress(dst4),
Short.toUnsignedInt((short) srcPort), Short.toUnsignedInt((short) dstPort));
} catch (UnknownHostException | IllegalArgumentException e) {
return String.format("Invalid IP address", e);
}
}
}
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