src/java.management/share/classes/sun/management/jdp/JdpBroadcaster.java

*** 33,42 ****
--- 33,43 ----
  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
*** 77,93 ****
--- 78,131 ----
          // 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);
          }
+         else {
+             Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
+             boolean succeed = false;
+ 
+             while (nics.hasMoreElements()) {
+                 NetworkInterface nic = nics.nextElement();
+ 
+                 if (nic.isUp() && nic.supportsMulticast()) {
+                     try {
+                         channel.setOption(StandardSocketOptions.IP_MULTICAST_IF, nic);
+                         succeed = true;
+                     } catch (IOException ex) {
+                         // pass
+                     }
+                 }
+ 
+                 if (!succeed) {
+                     throw new JdpException("Unable to bind to any interfaces.");
+                 }
+ 
+             }
+ 
+         }
+ 
      }
  
      /**
       * Create a new broadcaster
       *