--- a/src/wifibroadcast/WifiBroadcastTest.java	Tue Jul 31 16:27:50 2012 +0900
+++ b/src/wifibroadcast/WifiBroadcastTest.java	Tue Jul 31 16:32:03 2012 +0900
@@ -22,6 +22,7 @@
 	WifiReceiver wbs[] = new WifiReceiver[sender_count];
 	private boolean bchannel;
     private boolean tcp;
+    private String nis = "en1";
 
     public WifiBroadcastTest() {
         ports.add(0,DefaultPort);
@@ -40,9 +41,9 @@
 				Thread.sleep(timeout/4);
 				for(int i=0;i<wbs.length;i++) wbs[i] = new WifiMulticast(i,getAddress(i),getPort(i),WifiReceiver.SocketType.Sender);
 			} else if (mchannel) {
-			    for(int i=0;i<wbr.length;i++) wbr[i] = new WifiMulticastChannel(i,getAddress(i),getPort(i),WifiReceiver.SocketType.Receiver);
+			    for(int i=0;i<wbr.length;i++) wbr[i] = new WifiMulticastChannel(i,getAddress(i),getPort(i),nis, WifiReceiver.SocketType.Receiver);
 			    Thread.sleep(timeout/4);
-			    for(int i=0;i<wbs.length;i++) wbs[i] = new WifiMulticastChannel(i,getAddress(i),getPort(i),WifiReceiver.SocketType.Sender);                 
+			    for(int i=0;i<wbs.length;i++) wbs[i] = new WifiMulticastChannel(i,getAddress(i),getPort(i),nis, WifiReceiver.SocketType.Sender);                 
 			} else if (tcp) {
 			    addresses.remove(); addresses.add("127.1");
 			    for(int i=0;i<wbr.length;i++) wbr[i] = new WifiTCP(i,getAddress(i),getPort(i),WifiReceiver.SocketType.Receiver);
@@ -86,6 +87,7 @@
             case "-c":  i++; count = getOptInt(args, count, i); break;
             case "-t":  i++; timeout = getOptInt(args, (int) timeout, i); break;
             case "-T":  i++; testSize = getOptInt(args, testSize, i); break;
+            case "-n":  i++; nis = getOptString(args, nis, i); break;
             case "-p":  i++; setPort(args,i); break;
             case "-a":  i++; setAddress(args, i); break;
             default: i++;
@@ -100,6 +102,7 @@
                             "-c  N      send count packet\n"+
                             "-t  N      timeout N msec\n"+
                             "-T  N      send N byte packet\n"+
+                            "-n  en1   Network Interface name for multicast (default en1)\n"+
                             "-p  N      broadcast/multicast port\n"+
                             "-a  S      broadcast/multicast address\n"+
                             "-h          print this\n"+