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     static {

    47         AccessController.doPrivileged((PrivilegedAction<Void>)() -> {

    48             System.loadLibrary("net");

    49             return null;

    50         });

    51         init();

    52     }

    53 

    54     private ExtendedOptionsImpl() {}

    55 

    56     public static void checkSetOptionPermission(SocketOption<?> option) {

    57         SecurityManager sm = System.getSecurityManager();

    58         if (sm == null) {

    59             return;

    60         }

    61         String check = "setOption." + option.name();

    62         sm.checkPermission(new NetworkPermission(check));

    63     }

    64 

    65     public static void checkGetOptionPermission(SocketOption<?> option) {

    66         SecurityManager sm = System.getSecurityManager();

    67         if (sm == null) {

    68             return;

    69         }

    70         String check = "getOption." + option.name();

    71         sm.checkPermission(new NetworkPermission(check));

    72     }

    73 

    74     public static void checkValueType(Object value, Class<?> type) {

    75         if (!type.isAssignableFrom(value.getClass())) {

    76             String s = "Found: " + value.getClass().toString() + " Expected: "

    77                         + type.toString();

    78             throw new IllegalArgumentException(s);

    79         }

    80     }

    81 

    82     private static native void init();

    83 

    84     /*

    85      * Extension native implementations

    86      *

    87      * SO_FLOW_SLA

    88      */

    89     public static native void setFlowOption(FileDescriptor fd, SocketFlow f);

    90     public static native void getFlowOption(FileDescriptor fd, SocketFlow f);

    91     public static native boolean flowSupported();

    92 }