1 /*
   2  * Copyright (c) 2007, 2019, 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 sun.net.ext.ExtendedSocketOptions;
  31 
  32 /*
  33  * On Unix systems we simply delegate to native methods.
  34  *
  35  * @author Chris Hegarty
  36  */
  37 
  38 class PlainDatagramSocketImpl extends AbstractPlainDatagramSocketImpl
  39 {
  40     static {
  41         init();
  42     }
  43 
  44     protected void socketSetOption(int opt, Object val) throws SocketException {
  45         if (opt == SocketOptions.SO_REUSEPORT &&
  46             !supportedOptions().contains(StandardSocketOptions.SO_REUSEPORT)) {
  47             throw new UnsupportedOperationException("unsupported option");
  48         }
  49         try {
  50             socketSetOption0(opt, val);
  51         } catch (SocketException se) {
  52             if (!connected)
  53                 throw se;
  54         }
  55     }
  56 
  57     protected synchronized native void bind0(int lport, InetAddress laddr)
  58         throws SocketException;
  59 
  60     protected native void send(DatagramPacket p) throws IOException;
  61 
  62     protected synchronized native int peek(InetAddress i) throws IOException;
  63 
  64     protected synchronized native int peekData(DatagramPacket p) throws IOException;
  65 
  66     protected synchronized native void receive0(DatagramPacket p)
  67         throws IOException;
  68 
  69     protected native void setTimeToLive(int ttl) throws IOException;
  70 
  71     protected native int getTimeToLive() throws IOException;
  72 
  73     @Deprecated
  74     protected native void setTTL(byte ttl) throws IOException;
  75 
  76     @Deprecated
  77     protected native byte getTTL() throws IOException;
  78 
  79     protected native void join(InetAddress inetaddr, NetworkInterface netIf)
  80         throws IOException;
  81 
  82     protected native void leave(InetAddress inetaddr, NetworkInterface netIf)
  83         throws IOException;
  84 
  85     protected native void datagramSocketCreate() throws SocketException;
  86 
  87     protected native void datagramSocketClose();
  88 
  89     protected native void socketSetOption0(int opt, Object val)
  90         throws SocketException;
  91 
  92     protected native Object socketGetOption(int opt) throws SocketException;
  93 
  94     protected native void connect0(InetAddress address, int port) throws SocketException;
  95 
  96     protected native void disconnect0(int family);
  97 
  98     native int dataAvailable();
  99 
 100     /**
 101      * Perform class load-time initializations.
 102      */
 103     private static native void init();
 104 }