1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.net.ip;
18 
19 import android.net.util.InterfaceParams;
20 import android.os.Handler;
21 
22 import androidx.annotation.VisibleForTesting;
23 
24 /**
25  * Basic Duplicate address detection proxy.
26  *
27  * @hide
28  */
29 public class DadProxy {
30     private static final String TAG = DadProxy.class.getSimpleName();
31 
32     @VisibleForTesting
33     public static NeighborPacketForwarder naForwarder;
34     public static NeighborPacketForwarder nsForwarder;
35 
DadProxy(Handler h, InterfaceParams tetheredIface)36     public DadProxy(Handler h, InterfaceParams tetheredIface) {
37         naForwarder = new NeighborPacketForwarder(h, tetheredIface,
38                                         NeighborPacketForwarder.ICMPV6_NEIGHBOR_ADVERTISEMENT);
39         nsForwarder = new NeighborPacketForwarder(h, tetheredIface,
40                                         NeighborPacketForwarder.ICMPV6_NEIGHBOR_SOLICITATION);
41     }
42 
43     /** Stop NS/NA Forwarders. */
stop()44     public void stop() {
45         naForwarder.stop();
46         nsForwarder.stop();
47     }
48 
49     /** Set upstream iface on both forwarders. */
setUpstreamIface(InterfaceParams upstreamIface)50     public void setUpstreamIface(InterfaceParams upstreamIface) {
51         naForwarder.setUpstreamIface(upstreamIface);
52         nsForwarder.setUpstreamIface(upstreamIface);
53     }
54 }
55