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(new PrivilegedAction<Void>() {
  48             @Override
  49             public Void run() {
  50                 System.loadLibrary("net");
  51                 return null;
  52         }});
  53         init();
  54     }
  55 
  56     private ExtendedOptionsImpl() {}
  57 
  58     public static void checkSetOptionPermission(SocketOption<?> option) {
  59         SecurityManager sm = System.getSecurityManager();
  60         if (sm == null) {
  61             return;
  62         }
  63         String check = "setOption." + option.name();
  64         sm.checkPermission(new NetworkPermission(check));
  65     }
  66 
  67     public static void checkGetOptionPermission(SocketOption<?> option) {
  68         SecurityManager sm = System.getSecurityManager();
  69         if (sm == null) {
  70             return;
  71         }
  72         String check = "getOption." + option.name();
  73         sm.checkPermission(new NetworkPermission(check));
  74     }
  75 
  76     public static void checkValueType(Object value, Class<?> type) {
  77         if (!type.isAssignableFrom(value.getClass())) {
  78             String s = "Found: " + value.getClass().toString() + " Expected: "
  79                         + type.toString();
  80             throw new IllegalArgumentException(s);
  81         }
  82     }
  83 
  84     private static native void init();
  85 
  86     /*
  87      * Extension native implementations
  88      *
  89      * SO_FLOW_SLA
  90      */
  91     public static native void setFlowOption(FileDescriptor fd, SocketFlow f);
  92     public static native void getFlowOption(FileDescriptor fd, SocketFlow f);
  93     public static native boolean flowSupported();
  94 }