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      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
      6  * under the terms of the GNU General Public License version 2 only, as
      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
     22  * or visit www.oracle.com if you need additional information or have any
     23  * questions.
     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 
     57     private ExtendedOptionsImpl() {}
     58 
     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 
     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 
     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.
     94     public static void setFlowOption(FileDescriptor fd, SocketFlow f) {
     95         throw new UnsupportedOperationException("unsupported socket option");
     96     }
     97 
     98     public static void getFlowOption(FileDescriptor fd, SocketFlow f) {
     99         throw new UnsupportedOperationException("unsupported socket option");
    100     }
    101 
    102     public static boolean flowSupported() {
    103         return false;
    104     }
    105 }
    106