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.os.Handler;
20 
21 import androidx.annotation.VisibleForTesting;
22 
23 import com.android.net.module.util.InterfaceParams;
24 
25 /**
26  * Basic Duplicate address detection proxy.
27  *
28  * @hide
29  */
30 public class DadProxy {
31     private static final String TAG = DadProxy.class.getSimpleName();
32 
33     @VisibleForTesting
34     public static NeighborPacketForwarder naForwarder;
35     public static NeighborPacketForwarder nsForwarder;
36 
DadProxy(Handler h, InterfaceParams tetheredIface)37     public DadProxy(Handler h, InterfaceParams tetheredIface) {
38         naForwarder = new NeighborPacketForwarder(h, tetheredIface,
39                                         NeighborPacketForwarder.ICMPV6_NEIGHBOR_ADVERTISEMENT);
40         nsForwarder = new NeighborPacketForwarder(h, tetheredIface,
41                                         NeighborPacketForwarder.ICMPV6_NEIGHBOR_SOLICITATION);
42     }
43 
44     /** Stop NS/NA Forwarders. */
stop()45     public void stop() {
46         naForwarder.stop();
47         nsForwarder.stop();
48     }
49 
50     /** Set upstream iface on both forwarders. */
setUpstreamIface(InterfaceParams upstreamIface)51     public void setUpstreamIface(InterfaceParams upstreamIface) {
52         naForwarder.setUpstreamIface(upstreamIface);
53         nsForwarder.setUpstreamIface(upstreamIface);
54     }
55 }
56