1 /*
2  * Copyright (C) 2022 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 com.android.net.module.util;
18 
19 import static android.net.util.SocketUtils.closeSocket;
20 
21 import android.annotation.NonNull;
22 import android.annotation.RequiresApi;
23 import android.os.Build;
24 import android.system.NetlinkSocketAddress;
25 
26 import java.io.FileDescriptor;
27 import java.io.IOException;
28 import java.net.SocketAddress;
29 
30 /**
31  * Collection of utilities to interact with raw sockets.
32  *
33  * This class also provides utilities to interact with {@link android.net.util.SocketUtils}
34  * because it is in the API surface could not be simply move the frameworks/libs/net/
35  * to share with module.
36  *
37  * TODO: deprecate android.net.util.SocketUtils and replace with this class.
38  */
39 public class SocketUtils {
40 
41     /**
42      * Make a socket address to communicate with netlink.
43      */
44     @NonNull @RequiresApi(Build.VERSION_CODES.S)
makeNetlinkSocketAddress(int portId, int groupsMask)45     public static SocketAddress makeNetlinkSocketAddress(int portId, int groupsMask) {
46         return new NetlinkSocketAddress(portId, groupsMask);
47     }
48 
49     /**
50      * Close a socket, ignoring any exception while closing.
51      */
closeSocketQuietly(FileDescriptor fd)52     public static void closeSocketQuietly(FileDescriptor fd) {
53         try {
54             closeSocket(fd);
55         } catch (IOException ignored) {
56         }
57     }
58 
SocketUtils()59     private SocketUtils() {}
60 }
61