--- a/src/main/java/jp/ac/u_ryukyu/treevnc/TreeManagement.java	Mon Jul 04 20:19:31 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/treevnc/TreeManagement.java	Wed Jul 06 18:12:33 2016 +0900
@@ -11,11 +11,9 @@
 
     private final int treeId;
     public LinkedList<TreeVNCNode> nodeList = new LinkedList<TreeVNCNode>();
-    boolean runflag = false;
+    public LinkedList<NetworkAddress> treeAddresses = new LinkedList<NetworkAddress>();
     private final int treebranch = 2;
     private boolean showTreeNode = false;
-    private byte[] netmask;
-    private byte[] netaddress;
     //  node id
     //      ttttnnnnnnnnnnnn
     //      tttt          4bit tree number
@@ -31,6 +29,18 @@
         nodeList.add(me);
     }
 
+    private class NetworkAddress {
+        InetAddress inetaddress;
+        byte [] address;
+        byte [] netmask;
+
+        public NetworkAddress(InetAddress ipaddress, byte[] netaddress, byte[] netmask) {
+            inetaddress = ipaddress;
+            address = netaddress;
+            this.netmask = netmask;
+        }
+    }
+
     public int getTreeId() {
         return treeId;
     }
@@ -254,17 +264,21 @@
         return treebranch;
     }
 
-    public void setNetMask(byte[] netmask,byte[] netaddress) {
-        this.netmask = netmask;
-        this.netaddress = netaddress;
+    public void setNetMask(byte[] netmask, byte[] netaddress, InetAddress ipaddress) {
+        treeAddresses.add(new NetworkAddress(ipaddress,netaddress,netmask) );
     }
 
     public boolean onTheSameNetwork(InetAddress adr) {
         byte [] byteadr = adr.getAddress();
-        if (byteadr.length != netmask.length) return false;
-        for(int i=0; i < netmask.length; i++) {
-            if ((netmask[i] & byteadr[i])!=netaddress[i]) return false;
+        for (NetworkAddress n : treeAddresses) {
+            byte [] netmask = n.netmask;
+            byte [] netaddress = n.address;
+            if (byteadr.length != netmask.length) continue;
+            for (int i = 0; i < netmask.length; i++) {
+                if ((netmask[i] & byteadr[i]) != netaddress[i]) continue;
+            }
+            return true;
         }
-        return true;
+        return false;
     }
 }
\ No newline at end of file

--- a/src/main/java/jp/ac/u_ryukyu/treevnc/TreeVNCNetwork.java	Mon Jul 04 20:19:31 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/treevnc/TreeVNCNetwork.java	Wed Jul 06 18:12:33 2016 +0900
@@ -30,23 +30,22 @@
     	for (Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces(); e.hasMoreElements();) {
     		NetworkInterface ni = e.nextElement();
     		if (ni.isUp() && ni.supportsMulticast() && !ni.isLoopback()) {
-    			for (InterfaceAddress ipaddress : ni.getInterfaceAddresses()) {
-    				byte [] netmask = getNetMask(ipaddress);
+                TreeManagement treeManager = new TreeManagement(ni.getDisplayName(), ConnectionParams.DEFAULT_VNC_ROOT, myRfb.getViewer().getShowTree(),treeId++);
+                addNetworkInterface(ni, treeManager);  // it looks like only last address is used
+                for (InterfaceAddress ipaddress : ni.getInterfaceAddresses()) {
+                    byte [] netmask = getNetMask(ipaddress);
                     String hostName = ipaddress.getAddress().toString();
                     if (useHostName) {
                         hostName = ipaddress.getAddress().getHostName();
                     }
-                    TreeManagement treeManager = new TreeManagement(hostName, ConnectionParams.DEFAULT_VNC_ROOT, myRfb.getViewer().getShowTree(),treeId);
-    				treeManager.getList().getFirst().setPort(myRfb.getAcceptPort());
+                    treeManager.getList().getFirst().setPort(myRfb.getAcceptPort());
     				byte[] netaddr = ipaddress.getAddress().getAddress();
     				for(int i=0;i<netaddr.length;i++) {
     					netaddr[i] &= netmask[i];
     				}
-    				treeManager.setNetMask(netmask,netaddr);
-    				addNetworkInterface(ni, treeManager);  // it looks like only last address is used
-    				System.out.println("Interfaces :" + ni.getName() + " treeId=" + treeId + " " + hostName);
+    				treeManager.setNetMask(netmask,netaddr,ipaddress.getAddress());
+                    System.out.println("Interfaces :" + ni.getName() + " treeId=" + treeId + " " + hostName);
     			}
-				treeId++;
     		}
         }
     }