1 /*
   2  * Copyright (c) 2007, 2015, 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 package java.net;
  26 
  27 import java.io.IOException;
  28 import java.util.Set;
  29 import java.util.HashSet;
  30 import java.util.Collections;
  31 import jdk.net.*;
  32 import static sun.net.ExtendedOptionsImpl.*;
  33 
  34 /*
  35  * On Unix systems we simply delegate to native methods.
  36  *
  37  * @author Chris Hegarty
  38  */
  39 
  40 class PlainDatagramSocketImpl extends AbstractPlainDatagramSocketImpl
  41 {
  42     static {
  43         init();
  44     }
  45 
  46     protected <T> void setOption(SocketOption<T> name, T value) throws IOException {
  47         if (!name.equals(ExtendedSocketOptions.SO_FLOW_SLA)) {
  48             super.setOption(name, value);
  49         } else {
  50             if (isClosed()) {
  51                 throw new SocketException("Socket closed");
  52             }
  53             checkSetOptionPermission(name);
  54             checkValueType(value, SocketFlow.class);
  55             setFlowOption(getFileDescriptor(), (SocketFlow)value);
  56         }
  57     }
  58 
  59     @SuppressWarnings("unchecked")
  60     protected <T> T getOption(SocketOption<T> name) throws IOException {
  61         if (!name.equals(ExtendedSocketOptions.SO_FLOW_SLA)) {
  62             return super.getOption(name);
  63         }
  64         if (isClosed()) {
  65             throw new SocketException("Socket closed");
  66         }
  67         checkGetOptionPermission(name);
  68         SocketFlow flow = SocketFlow.create();
  69         getFlowOption(getFileDescriptor(), flow);
  70         return (T)flow;
  71     }
  72 
  73     protected Set<SocketOption<?>> supportedOptions() {
  74         HashSet<SocketOption<?>> options = new HashSet<>(
  75             super.supportedOptions());
  76 
  77         if (flowSupported()) {
  78             options.add(ExtendedSocketOptions.SO_FLOW_SLA);
  79         }
  80         return options;
  81     }
  82 
  83     protected synchronized native void bind0(int lport, InetAddress laddr)
  84         throws SocketException;
  85 
  86     protected native void send(DatagramPacket p) throws IOException;
  87 
  88     protected synchronized native int peek(InetAddress i) throws IOException;
  89 
  90     protected synchronized native int peekData(DatagramPacket p) throws IOException;
  91 
  92     protected synchronized native void receive0(DatagramPacket p)
  93         throws IOException;
  94 
  95     protected native void setTimeToLive(int ttl) throws IOException;
  96 
  97     protected native int getTimeToLive() throws IOException;
  98 
  99     @Deprecated
 100     protected native void setTTL(byte ttl) throws IOException;
 101 
 102     @Deprecated
 103     protected native byte getTTL() throws IOException;
 104 
 105     protected native void join(InetAddress inetaddr, NetworkInterface netIf)
 106         throws IOException;
 107 
 108     protected native void leave(InetAddress inetaddr, NetworkInterface netIf)
 109         throws IOException;
 110 
 111     protected native void datagramSocketCreate() throws SocketException;
 112 
 113     protected native void datagramSocketClose();
 114 
 115     protected native void socketSetOption(int opt, Object val)
 116         throws SocketException;
 117 
 118     protected native Object socketGetOption(int opt) throws SocketException;
 119 
 120     protected native void connect0(InetAddress address, int port) throws SocketException;
 121 
 122     protected native void disconnect0(int family);
 123 
 124     native int dataAvailable();
 125 
 126     /**
 127      * Perform class load-time initializations.
 128      */
 129     private native static void init();
 130 }