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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     private ExtendedOptionsImpl() {}
     47 
     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 
     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 
     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.
     80     public static void setFlowOption(FileDescriptor fd, SocketFlow f) {
     81         throw new UnsupportedOperationException("unsupported socket option");
     82     }
     83 
     84     public static void getFlowOption(FileDescriptor fd, SocketFlow f) {
     85         throw new UnsupportedOperationException("unsupported socket option");
     86     }
     87 
     88     public static boolean flowSupported() {
     89         return false;
     90     }
     91 }
     92