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.io.FileDescriptor;
  29 import java.util.Set;
  30 import java.util.HashSet;
  31 import sun.net.ext.ExtendedSocketOptions;
  32 
  33 /*
  34  * On Unix systems we simply delegate to native methods.
  35  *
  36  * @author Chris Hegarty
  37  */
  38 
  39 class PlainSocketImpl extends AbstractPlainSocketImpl
  40 {
  41     static {
  42         initProto();
  43     }
  44 
  45     /**
  46      * Constructs an empty instance.
  47      */
  48     PlainSocketImpl(boolean isServer) {
  49         super(isServer);
  50     }
  51 
  52     static final ExtendedSocketOptions extendedOptions =
  53             ExtendedSocketOptions.getInstance();
  54 
  55     protected <T> void setOption(SocketOption<T> name, T value) throws IOException {
  56         if (isClosedOrPending()) {
  57             throw new SocketException("Socket closed");
  58         }
  59         if (supportedOptions().contains(name)) {
  60             if (extendedOptions.isOptionSupported(name)) {
  61                 extendedOptions.setOption(fd, name, value);
  62             } else {
  63                 super.setOption(name, value);
  64             }
  65         } else {
  66             throw new UnsupportedOperationException("unsupported option");
  67         }
  68     }
  69 
  70     @SuppressWarnings("unchecked")
  71     protected <T> T getOption(SocketOption<T> name) throws IOException {
  72         if (isClosedOrPending()) {
  73             throw new SocketException("Socket closed");
  74         }
  75         if (supportedOptions().contains(name)) {
  76             if (extendedOptions.isOptionSupported(name)) {
  77                 return (T) extendedOptions.getOption(fd, name);
  78             } else {
  79                 return super.getOption(name);
  80             }
  81         } else {
  82             throw new UnsupportedOperationException("unsupported option");
  83         }
  84     }
  85 
  86     protected Set<SocketOption<?>> supportedOptions() {
  87         HashSet<SocketOption<?>> options = new HashSet<>(super.supportedOptions());
  88         if (isServer) {
  89             options.addAll(ExtendedSocketOptions.serverSocketOptions());
  90         } else {
  91             options.addAll(ExtendedSocketOptions.clientSocketOptions());
  92         }
  93         return options;
  94     }
  95 
  96     protected void socketSetOption(int opt, boolean b, Object val) throws SocketException {
  97         if (opt == SocketOptions.SO_REUSEPORT &&
  98             !supportedOptions().contains(StandardSocketOptions.SO_REUSEPORT)) {
  99             throw new UnsupportedOperationException("unsupported option");
 100         }
 101         try {
 102             socketSetOption0(opt, b, val);
 103         } catch (SocketException se) {
 104             if (!isConnected)
 105                 throw se;
 106         }
 107     }
 108 
 109     void socketCreate(boolean stream) throws IOException {
 110         socketCreate(stream, isServer);
 111     }
 112 
 113     native void socketCreate(boolean stream, boolean isServer) throws IOException;
 114 
 115     native void socketConnect(InetAddress address, int port, int timeout)
 116         throws IOException;
 117 
 118     native void socketBind(InetAddress address, int port)
 119         throws IOException;
 120 
 121     native void socketListen(int count) throws IOException;
 122 
 123     native void socketAccept(SocketImpl s) throws IOException;
 124 
 125     native int socketAvailable() throws IOException;
 126 
 127     native void socketClose0(boolean useDeferredClose) throws IOException;
 128 
 129     native void socketShutdown(int howto) throws IOException;
 130 
 131     static native void initProto();
 132 
 133     native void socketSetOption0(int cmd, boolean on, Object value)
 134         throws SocketException;
 135 
 136     native int socketGetOption(int opt, Object iaContainerObj) throws SocketException;
 137 
 138     native void socketSendUrgentData(int data) throws IOException;
 139 }