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               || (name.equals(ExtendedSocketOptions.SO_REUSEPORT)))) {
  49             super.setOption(name, value);
  50         } else {
  51             if (isClosed()) {
  52                 throw new SocketException("Socket closed");
  53             }
  54             if (name.equals(ExtendedSocketOptions.SO_FLOW_SLA)) {
  55                 checkSetOptionPermission(name);
  56                 checkValueType(value, SocketFlow.class);
  57                 setFlowOption(getFileDescriptor(), (SocketFlow)value);
  58             } else {
  59                 checkValueType(value, Boolean.class);
  60                 setReusePortOption(getFileDescriptor(), ((Boolean)value).booleanValue());
  61             }
  62        }
  63     }
  64 
  65     @SuppressWarnings("unchecked")
  66     protected <T> T getOption(SocketOption<T> name) throws IOException {
  67         if (!(name.equals(ExtendedSocketOptions.SO_FLOW_SLA)
  68               || (name.equals(ExtendedSocketOptions.SO_REUSEPORT)))) {
  69             return super.getOption(name);
  70         }
  71         if (isClosed()) {
  72             throw new SocketException("Socket closed");
  73         }
  74         if (name.equals(ExtendedSocketOptions.SO_FLOW_SLA)) {
  75             checkGetOptionPermission(name);
  76             SocketFlow flow = SocketFlow.create();
  77             getFlowOption(getFileDescriptor(), flow);
  78             return (T)flow;
  79         }
  80         return (T)getReusePortOption(getFileDescriptor());
  81     }
  82 
  83     protected Set<SocketOption<?>> supportedOptions() {
  84         HashSet<SocketOption<?>> options = new HashSet<>(
  85             super.supportedOptions());
  86 
  87         if (flowSupported()) {
  88             options.add(ExtendedSocketOptions.SO_FLOW_SLA);
  89         }
  90         if (reuseportSupported()) {
  91             options.add(ExtendedSocketOptions.SO_REUSEPORT);
  92         }
  93         return options;
  94     }
  95 
  96     protected void socketSetOption(int opt, Object val) throws SocketException {
  97         try {
  98             socketSetOption0(opt, val);
  99         } catch (SocketException se) {
 100             if (!connected)
 101                 throw se;
 102         }
 103     }
 104 
 105     protected synchronized native void bind0(int lport, InetAddress laddr)
 106         throws SocketException;
 107 
 108     protected native void send(DatagramPacket p) throws IOException;
 109 
 110     protected synchronized native int peek(InetAddress i) throws IOException;
 111 
 112     protected synchronized native int peekData(DatagramPacket p) throws IOException;
 113 
 114     protected synchronized native void receive0(DatagramPacket p)
 115         throws IOException;
 116 
 117     protected native void setTimeToLive(int ttl) throws IOException;
 118 
 119     protected native int getTimeToLive() throws IOException;
 120 
 121     @Deprecated
 122     protected native void setTTL(byte ttl) throws IOException;
 123 
 124     @Deprecated
 125     protected native byte getTTL() throws IOException;
 126 
 127     protected native void join(InetAddress inetaddr, NetworkInterface netIf)
 128         throws IOException;
 129 
 130     protected native void leave(InetAddress inetaddr, NetworkInterface netIf)
 131         throws IOException;
 132 
 133     protected native void datagramSocketCreate() throws SocketException;
 134 
 135     protected native void datagramSocketClose();
 136 
 137     protected native void socketSetOption0(int opt, Object val)
 138         throws SocketException;
 139 
 140     protected native Object socketGetOption(int opt) throws SocketException;
 141 
 142     protected native void connect0(InetAddress address, int port) throws SocketException;
 143 
 144     protected native void disconnect0(int family);
 145 
 146     native int dataAvailable();
 147 
 148     /**
 149      * Perform class load-time initializations.
 150      */
 151     private static native void init();
 152 }