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 jdk.net;
  27 
  28 import java.net.SocketOption;
  29 
  30 /**
  31  * Defines extended socket options, beyond those defined in
  32  * {@link java.net.StandardSocketOptions}. These options may be platform
  33  * specific.
  34  *
  35  * @since 1.8
  36  */
  37 @jdk.Exported
  38 public final class ExtendedSocketOptions {
  39 
  40     private static class ExtSocketOption<T> implements SocketOption<T> {
  41         private final String name;
  42         private final Class<T> type;
  43         ExtSocketOption(String name, Class<T> type) {
  44             this.name = name;
  45             this.type = type;
  46         }
  47         @Override public String name() { return name; }
  48         @Override public Class<T> type() { return type; }
  49         @Override public String toString() { return name; }
  50     }
  51 
  52     private ExtendedSocketOptions() {}
  53 
  54     /**
  55      * Service level properties. When a security manager is installed,
  56      * setting or getting this option requires a {@link NetworkPermission}
  57      * {@code ("setOption.SO_FLOW_SLA")} or {@code "getOption.SO_FLOW_SLA"}
  58      * respectively.
  59      */
  60     public static final SocketOption<SocketFlow> SO_FLOW_SLA = new
  61         ExtSocketOption<SocketFlow>("SO_FLOW_SLA", SocketFlow.class);
  62 
  63     /** 
  64      *  Sets SO_REUSEPORT for a socket. This option enables and disables
  65      *  the ability of having multiple sockets listen to the same address
  66      *  and port. It is supported in Linux with kernel 3.9+. 
  67      *  Setting or getting this option requires
  68      *  {@code ("setOption.SO_REUSEPORT")} or {@code "getOption.SO_REUSEPORT"}
  69      *  respectively.
  70      */
  71     public static final SocketOption<Boolean> SO_REUSEPORT = new
  72         ExtSocketOption<Boolean>("SO_REUSEPORT", Boolean.class);
  73 }