1 /*
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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
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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 
ExtendedOptionsImpl()46     private ExtendedOptionsImpl() {}
47 
checkSetOptionPermission(SocketOption<?> option)48     public static void checkSetOptionPermission(SocketOption<?> option) {
49         SecurityManager sm = System.getSecurityManager();
50         if (sm == null) {
51             return;
52         }
53         String check = "setOption." + option.name();
54         sm.checkPermission(new NetworkPermission(check));
55     }
56 
checkGetOptionPermission(SocketOption<?> option)57     public static void checkGetOptionPermission(SocketOption<?> option) {
58         SecurityManager sm = System.getSecurityManager();
59         if (sm == null) {
60             return;
61         }
62         String check = "getOption." + option.name();
63         sm.checkPermission(new NetworkPermission(check));
64     }
65 
checkValueType(Object value, Class<?> type)66     public static void checkValueType(Object value, Class<?> type) {
67         if (!type.isAssignableFrom(value.getClass())) {
68             String s = "Found: " + value.getClass().toString() + " Expected: "
69                         + type.toString();
70             throw new IllegalArgumentException(s);
71         }
72     }
73 
74     /*
75      * Extension native implementations
76      *
77      * SO_FLOW_SLA
78      */
79     // Android-changed: Linux does not support flow operations.
setFlowOption(FileDescriptor fd, SocketFlow f)80     public static void setFlowOption(FileDescriptor fd, SocketFlow f) {
81         throw new UnsupportedOperationException("unsupported socket option");
82     }
83 
getFlowOption(FileDescriptor fd, SocketFlow f)84     public static void getFlowOption(FileDescriptor fd, SocketFlow f) {
85         throw new UnsupportedOperationException("unsupported socket option");
86     }
87 
flowSupported()88     public static boolean flowSupported() {
89         return false;
90     }
91 }
92