1 /*
2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
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7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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24  */
25 
26 package sun.net;
27 
28 import java.net.*;
29 import jdk.net.*;
30 import java.io.IOException;
31 import java.io.FileDescriptor;
32 import java.security.PrivilegedAction;
33 import java.security.AccessController;
34 import java.lang.reflect.Field;
35 import java.util.Set;
36 import java.util.HashSet;
37 import java.util.HashMap;
38 import java.util.Collections;
39 
40 /**
41  * Contains the native implementation for extended socket options
42  * together with some other static utilities
43  */
44 public class ExtendedOptionsImpl {
45 
46     // Android-removed: System.loadLibrary("net") is not available on Android.
47     /*
48     static {
49         AccessController.doPrivileged((PrivilegedAction<Void>)() -> {
50             System.loadLibrary("net");
51             return null;
52         });
53         init();
54     }
55     */
56 
ExtendedOptionsImpl()57     private ExtendedOptionsImpl() {}
58 
checkSetOptionPermission(SocketOption<?> option)59     public static void checkSetOptionPermission(SocketOption<?> option) {
60         SecurityManager sm = System.getSecurityManager();
61         if (sm == null) {
62             return;
63         }
64         String check = "setOption." + option.name();
65         sm.checkPermission(new NetworkPermission(check));
66     }
67 
checkGetOptionPermission(SocketOption<?> option)68     public static void checkGetOptionPermission(SocketOption<?> option) {
69         SecurityManager sm = System.getSecurityManager();
70         if (sm == null) {
71             return;
72         }
73         String check = "getOption." + option.name();
74         sm.checkPermission(new NetworkPermission(check));
75     }
76 
checkValueType(Object value, Class<?> type)77     public static void checkValueType(Object value, Class<?> type) {
78         if (!type.isAssignableFrom(value.getClass())) {
79             String s = "Found: " + value.getClass().toString() + " Expected: "
80                         + type.toString();
81             throw new IllegalArgumentException(s);
82         }
83     }
84 
85     // Android-removed: Native initialization logic that doesn't exist on Android.
86     // private static native void init();
87 
88     /*
89      * Extension native implementations
90      *
91      * SO_FLOW_SLA
92      */
93     // Android-changed: Linux does not support flow operations.
setFlowOption(FileDescriptor fd, SocketFlow f)94     public static void setFlowOption(FileDescriptor fd, SocketFlow f) {
95         throw new UnsupportedOperationException("unsupported socket option");
96     }
97 
getFlowOption(FileDescriptor fd, SocketFlow f)98     public static void getFlowOption(FileDescriptor fd, SocketFlow f) {
99         throw new UnsupportedOperationException("unsupported socket option");
100     }
101 
flowSupported()102     public static boolean flowSupported() {
103         return false;
104     }
105 }
106