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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.networkstack.tethering;
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.Inet6Address;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.Objects;
/** The key of BpfMap which is used for bpf offload. */
public class TetherDownstream6Key extends Struct {
@Field(order = 0, type = Type.U32)
public final long iif; // The input interface index.
@Field(order = 1, type = Type.EUI48, padding = 2)
public final MacAddress dstMac; // Destination ethernet mac address (zeroed iff rawip ingress).
@Field(order = 2, type = Type.ByteArray, arraysize = 16)
public final byte[] neigh6; // The destination IPv6 address.
public TetherDownstream6Key(final long iif, @NonNull final MacAddress dstMac,
final byte[] neigh6) {
Objects.requireNonNull(dstMac);
try {
final Inet6Address unused = (Inet6Address) InetAddress.getByAddress(neigh6);
} catch (ClassCastException | UnknownHostException e) {
throw new IllegalArgumentException("Invalid IPv6 address: "
+ Arrays.toString(neigh6));
}
this.iif = iif;
this.dstMac = dstMac;
this.neigh6 = neigh6;
}
@Override
public String toString() {
try {
return String.format("iif: %d, dstMac: %s, neigh: %s", iif, dstMac,
Inet6Address.getByAddress(neigh6));
} catch (UnknownHostException e) {
// Should not happen because construtor already verify neigh6.
throw new IllegalStateException("Invalid TetherDownstream6Key");
}
}
}
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