8234148: DatagramSocket.setOption/getOption/supportedOption should support multicast options

Fix adds multicast socket options to DatagramSocket

Reviewed-by: alanb, dfuchs, vtewari

src/java.base/share/classes/java/net/AbstractPlainDatagramSocketImpl.java

@@ -404,22 +404,8 @@ abstract class AbstractPlainDatagramSocketImpl extends DatagramSocketImpl
             ExtendedSocketOptions.getInstance();
 
     private static final Set<SocketOption<?>> datagramSocketOptions = datagramSocketOptions();
-    private static final Set<SocketOption<?>> multicastSocketOptions = multicastSocketOptions();
 
     private static Set<SocketOption<?>> datagramSocketOptions() {
-        HashSet<SocketOption<?>> options = new HashSet<>();
-        options.add(StandardSocketOptions.SO_SNDBUF);
-        options.add(StandardSocketOptions.SO_RCVBUF);
-        options.add(StandardSocketOptions.SO_REUSEADDR);
-        options.add(StandardSocketOptions.SO_BROADCAST);
-        options.add(StandardSocketOptions.IP_TOS);
-        if (isReusePortAvailable())
-            options.add(StandardSocketOptions.SO_REUSEPORT);
-        options.addAll(ExtendedSocketOptions.datagramSocketOptions());
-        return Collections.unmodifiableSet(options);
-    }
-
-    private static Set<SocketOption<?>> multicastSocketOptions() {
         HashSet<SocketOption<?>> options = new HashSet<>();
         options.add(StandardSocketOptions.SO_SNDBUF);
         options.add(StandardSocketOptions.SO_RCVBUF);
@@ -437,9 +423,6 @@ abstract class AbstractPlainDatagramSocketImpl extends DatagramSocketImpl
 
     @Override
     protected Set<SocketOption<?>> supportedOptions() {
-        if (isMulticast)
-            return multicastSocketOptions;
-        else
             return datagramSocketOptions;
     }
 

src/java.base/windows/classes/java/net/DualStackPlainDatagramSocketImpl.java

@@ -25,9 +25,14 @@
 package java.net;
 
 import java.io.IOException;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
 import jdk.internal.access.SharedSecrets;
 import jdk.internal.access.JavaIOFileDescriptorAccess;
 
+import sun.net.ext.ExtendedSocketOptions;
+
 /**
  * This class defines the plain DatagramSocketImpl that is used on
  * Windows platforms greater than or equal to Windows Vista. These
@@ -230,6 +235,19 @@ class DualStackPlainDatagramSocketImpl extends AbstractPlainDatagramSocketImpl
         return returnValue;
     }
 
+    @Override
+    protected Set<SocketOption<?>> supportedOptions() {
+        HashSet<SocketOption<?>> options = new HashSet<>();
+        options.add(StandardSocketOptions.SO_SNDBUF);
+        options.add(StandardSocketOptions.SO_RCVBUF);
+        options.add(StandardSocketOptions.SO_REUSEADDR);
+        options.add(StandardSocketOptions.SO_BROADCAST);
+        options.add(StandardSocketOptions.IP_TOS);
+
+        options.addAll(ExtendedSocketOptions.datagramSocketOptions());
+        return Collections.unmodifiableSet(options);
+    }
+
     /* Multicast specific methods.
      * Multicasting on a dual layer TCP/IP stack is always done with
      * TwoStacksPlainDatagramSocketImpl. This is to overcome the lack

test/jdk/java/net/DatagramSocket/SupportedOptionsCheck.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8234148
+ * @library /test/lib
+ * @summary checks that the DatagramSocket supportedOptions set contains all
+ *  MulticastSocket socket options
+ * @run testng SupportedOptionsCheck
+ */
+
+import jdk.test.lib.Platform;
+import org.testng.annotations.Test;
+
+import java.net.DatagramSocket;
+import java.net.StandardSocketOptions;
+import java.util.Set;
+
+import static org.testng.Assert.assertTrue;
+
+public class SupportedOptionsCheck {
+
+    @Test
+    public void checkMulticastOptionsAreReturned() throws Exception {
+        try (DatagramSocket ds = new DatagramSocket())
+        {
+            Set<?> options = ds.supportedOptions();
+            Set<?> multicastOptions = Set.of(
+                    StandardSocketOptions.IP_MULTICAST_IF,
+                    StandardSocketOptions.IP_MULTICAST_TTL,
+                    StandardSocketOptions.IP_MULTICAST_LOOP);
+
+            if (!Platform.isWindows())
+                assertTrue(options.containsAll(multicastOptions));
+        }
+    }
+}

test/jdk/java/net/SocketOption/SupportedOptionsSet.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -22,7 +22,8 @@
  */
 
 import java.io.IOException;
-import java.net.*;
+import java.net.ServerSocket;
+import java.net.Socket;
 import java.util.Set;
 import static java.lang.System.out;
 import jdk.test.lib.net.IPSupport;
@@ -54,39 +55,24 @@ public class SupportedOptionsSet {
 
     static void first() throws IOException {
         try (Socket s = new Socket();
-             ServerSocket ss = new ServerSocket();
-             DatagramSocket ds = new DatagramSocket();
-             MulticastSocket ms = new MulticastSocket()) {
-
+             ServerSocket ss = new ServerSocket())
+        {
             Set<?> first = s.supportedOptions();
             Set<?> second = ss.supportedOptions();
             assertNotEqual(first, second,
                  "Socket and ServerSocket should have different options.");
-
-            first = ds.supportedOptions();
-            second = ms.supportedOptions();
-            assertNotEqual(first, second,
-                "DatagramSocket and MulticastSocket should have different options.");
         }
     }
 
     /** Tests with the order of access to supportedOptions reversed.  */
     static void second() throws IOException {
         try (ServerSocket ss = new ServerSocket();
-             Socket s = new Socket();
-             DatagramSocket ds = new DatagramSocket();
-             MulticastSocket ms = new MulticastSocket()) {
-
+             Socket s = new Socket())
+        {
             Set<?> first = ss.supportedOptions();
             Set<?> second = s.supportedOptions();
             assertNotEqual(first, second,
                 "ServerSocket and Socket should have different options.");
-
-            first = ms.supportedOptions();
-            second = ds.supportedOptions();
-            assertNotEqual(first, second,
-                "MulticastSocket and DatagramSocket should have different options.");
-
         }
     }