--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.management.agent/share/classes/sun/management/jdp/JdpBroadcaster.java	Tue Jan 31 20:06:32 2017 -0800
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2013, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+package sun.management.jdp;
+
+import java.io.IOException;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.NetworkInterface;
+import java.net.ProtocolFamily;
+import java.net.StandardProtocolFamily;
+import java.net.StandardSocketOptions;
+import java.nio.ByteBuffer;
+import java.nio.channels.DatagramChannel;
+import java.nio.channels.UnsupportedAddressTypeException;
+import java.util.Enumeration;
+
+/**
+ * JdpBroadcaster is responsible for sending pre-built JDP packet across a Net
+ *
+ * <p> Multicast group address, port number and ttl have to be chosen on upper
+ * level and passed to broadcaster constructor. Also it's possible to specify
+ * source address to broadcast from. </p>
+ *
+ * <p>JdpBradcaster doesn't perform any validation on a supplied {@code port} and {@code ttl} because
+ * the allowed values depend on an operating system setup</p>
+ *
+ */
+public final class JdpBroadcaster {
+
+    private final InetAddress addr;
+    private final int port;
+    private final DatagramChannel channel;
+
+    /**
+     * Create a new broadcaster
+     *
+     * @param address - multicast group address
+     * @param srcAddress - address of interface we should use to broadcast.
+     * @param port - udp port to use
+     * @param ttl - packet ttl
+     * @throws IOException
+     */
+    public JdpBroadcaster(InetAddress address, InetAddress srcAddress, int port, int ttl)
+            throws IOException, JdpException {
+        this.addr = address;
+        this.port = port;
+
+        ProtocolFamily family = (address instanceof Inet6Address)
+                ? StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
+
+        channel = DatagramChannel.open(family);
+        channel.setOption(StandardSocketOptions.SO_REUSEADDR, true);
+        channel.setOption(StandardSocketOptions.IP_MULTICAST_TTL, ttl);
+
+        // with srcAddress equal to null, this constructor do exactly the same as
+        // if srcAddress is not passed
+        if (srcAddress != null) {
+            // User requests particular interface to bind to
+            NetworkInterface interf = NetworkInterface.getByInetAddress(srcAddress);
+
+            if (interf == null) {
+                throw new JdpException("Unable to get network interface for " + srcAddress.toString());
+            }
+
+            if (!interf.isUp()) {
+                throw new JdpException(interf.getName() + " is not up.");
+            }
+
+            if (!interf.supportsMulticast()) {
+                throw new JdpException(interf.getName() + " does not support multicast.");
+            }
+
+            try {
+                channel.bind(new InetSocketAddress(srcAddress, 0));
+            } catch (UnsupportedAddressTypeException ex) {
+                throw new JdpException("Unable to bind to source address");
+            }
+            channel.setOption(StandardSocketOptions.IP_MULTICAST_IF, interf);
+        }
+    }
+
+    /**
+     * Create a new broadcaster
+     *
+     * @param address - multicast group address
+     * @param port - udp port to use
+     * @param ttl - packet ttl
+     * @throws IOException
+     */
+    public JdpBroadcaster(InetAddress address, int port, int ttl)
+            throws IOException, JdpException {
+        this(address, null, port, ttl);
+    }
+
+    /**
+     * Broadcast pre-built packet
+     *
+     * @param packet - instance of JdpPacket
+     * @throws IOException
+     */
+    public void sendPacket(JdpPacket packet)
+            throws IOException {
+        byte[] data = packet.getPacketData();
+        // Unlike allocate/put wrap don't need a flip afterward
+        ByteBuffer b = ByteBuffer.wrap(data);
+        channel.send(b, new InetSocketAddress(addr, port));
+    }
+
+    /**
+     * Shutdown broadcaster and close underlying socket channel
+     *
+     * @throws IOException
+     */
+    public void shutdown() throws IOException {
+        channel.close();
+    }
+}