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/**
* TestNetSwing , a network Ivy domain checker.
* @author Yannick Jestin <mailto:jestin@cena.fr>
*
* (c) CENA
* A simple Swing application in order to check a network
*
* Changelog:
* 1.2.8
* - apache regexp instead of gnu regexp
*/
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import fr.dgac.ivy.*;
import java.util.regex.*;
import gnu.getopt.*;
class TestNetSwing implements Runnable {
private JFrame frame;
private JLabel receive;
private JButton send;
private int alpha=0;
private Color color;
private static int FADINGSTEP = 20;
private static int FADINGSLEEP = 100;
private static int DEFAULT_RED=200;
private static int DEFAULT_GREEN=10;
private static int DEFAULT_BLUE=10;
private static int DEFAULT_ALPHA=255;
private static Color DEFAULT_COLOR =
new Color(DEFAULT_RED,DEFAULT_GREEN,DEFAULT_BLUE,DEFAULT_ALPHA);
private Ageing age;
private String domainAddr="none";
private int port=0;
private int serial=1;
private boolean watcherrunning = false;
private volatile Thread watcherThread;
private boolean isMulticastAddress = false;
private Thread broadcastListener ;
private DatagramSocket broadcast; /* supervision socket */
// it can also be a MulticastSocket, which inherits from the previous
public TestNetSwing(String da,int p) {
this.domainAddr=da;
this.port=p;
createBroadcastListener();
frame = new JFrame("TestNet "+domainAddr+":"+port);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container cp = frame.getContentPane();
cp.setLayout(new GridLayout(0,1));
cp.add(send = new JButton("send packet to "+domainAddr+":"+port));
send.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent ae) {
send("hello",domainAddr,port);
}
});
cp.add(receive = new JLabel(""));
boolean sel = false;
frame.pack();
age=new Ageing();
frame.setVisible(true);
}
public void run() {
byte buf[] = new byte[256];
Thread thisThread=Thread.currentThread();
for (int i=0;i<buf.length;i++) { buf[i]=10; }
DatagramPacket packet=new DatagramPacket(buf, 256);
String s = "Server waiting for Broadcast on "+domainAddr+":"+port;
s+=(isMulticastAddress)?" (TCP multicast)":" (UDP broadcast)";
System.out.println(s);
while( watcherThread==thisThread) try {
broadcast.receive(packet);
String msg = new String(buf) ;
// clean up the buffer after each message
for (int i=0;i<buf.length;i++) { buf[i]=10; }
InetAddress remotehost = packet.getAddress();
updateLabel("("+(serial++)+") "+ remotehost.getHostName()+":"+msg);
} catch (java.io.InterruptedIOException jii ){
if (watcherThread!=thisThread) break;
} catch (java.io.IOException ioe ){
System.err.println("IvyWatcher IOException "+ ioe.getMessage() );
}
broadcast.close();
System.out.println("Server normal shutdown");
}
synchronized void stop() {
Thread t = watcherThread;
watcherThread = null;
if (t!=null) { t.interrupt(); }
}
private void updateLabel(String text) {
if (text==null) return;
int i = text.indexOf(10);
if (i>0) { receive.setText(text.substring(0,i)); }
else { receive.setText(text); }
alpha=DEFAULT_ALPHA;
color=DEFAULT_COLOR;
receive.setForeground(color);
}
private static void send(String data, String domain,int port) {
try {
DatagramSocket send;
InetAddress group = InetAddress.getByName(domain);
send = new MulticastSocket(port);
if (group.isMulticastAddress()) { ((MulticastSocket)send).joinGroup(group); }
DatagramPacket packet = new DatagramPacket(
data.getBytes(),
data.length(),
group,
send.getLocalPort() );
//System.out.println("Client sends Broadcast to "+net+":"+port+" ("+packet.getLength()+") ["+data+"]");
send.send(packet);
} catch ( UnknownHostException e ) {
System.out.println("Broadcast sent on unknown network "+ e.getMessage());
} catch ( IOException e ) {
System.out.println("Broadcast error " + e.getMessage() );
}
}
private void createBroadcastListener() {
try {
InetAddress group = InetAddress.getByName(domainAddr);
if (group.isMulticastAddress()) {
isMulticastAddress = true;
broadcast = new MulticastSocket(port); // create the UDP socket
((MulticastSocket)broadcast).joinGroup(group);
} else {
broadcast = new MulticastSocket(port); // create the UDP socket
}
} catch ( IOException e ) {
System.out.println("MulticastSocket I/O error" + e );
e.printStackTrace();
System.exit(0);
}
try {
broadcast.setSoTimeout(Ivy.TIMEOUTLENGTH);
} catch ( java.net.SocketException jns ) {
System.out.println("IvyWatcher setSoTimeout error" + jns.getMessage() );
}
watcherThread = new Thread(this);
watcherThread.start();
}
private class Ageing implements Runnable {
boolean encore = true;
public Ageing() {
new Thread(this).start();
}
public void run() {
while (encore) {
try {
java.lang.Thread.sleep(FADINGSLEEP);
} catch (InterruptedException ie) {
}
alpha-=FADINGSTEP;
String s = receive.getText();
if (alpha<0) {
alpha=0;
receive.setText(null);
s=null;
}
if (s!=null) { receive.setForeground(new Color(DEFAULT_RED,DEFAULT_GREEN,DEFAULT_BLUE,alpha)); }
}
}
public void stop(){ encore=false; }
}
/*
* copied verbatim from IvyWatcher , I should put TestNetSwing *in* the
* distribution itself ...
*/
static String getDomain(String net) throws IvyException {
// System.out.println("debug: net=[" + net+ "]");
int sep_index = net.lastIndexOf( ":" );
if ( sep_index != -1 ) { net = net.substring(0,sep_index); }
try {
Pattern numbersPoint = Pattern.compile("([0-9]|\\.)+");
if (!numbersPoint.matcher(net).matches()) {
// traceDebug("should only have numbers and point ? I won't add anything... " + net);
return net;
}
net += ".255.255.255";
Pattern exp = Pattern.compile( "^(\\d+\\.\\d+\\.\\d+\\.\\d+).*");
Matcher m = exp.matcher(net);
if (!m.matches()) {
System.out.println("Bad broascat addr " + net);
throw new IvyException("bad broadcast addr");
}
net=m.group(1);
} catch ( PatternSyntaxException e ){
System.out.println(e);
System.exit(0);
}
// System.out.println("debug: returning net=[" + net+ "]");
return net;
}
static int getPort(String net) { // returns 0 if no port is set
int sep_index = net.lastIndexOf( ":" );
int port= ( sep_index == -1 ) ? 0 :Integer.parseInt( net.substring( sep_index +1 ));
// System.out.println("net: ["+net+"]\nsep_index: "+sep_index+"\nport: "+port);
return port;
}
public static final String helpmsg = "usage: java TestNetSwing [options]\n\t-b BUS\tspecifies the Ivy bus domain\n\t-h\thelp\n\n";
public static void main(String[] args) throws IvyException {
Getopt opt = new Getopt("TestNetSwing",args,"b:h");
int c;
String domainstring = Ivy.getDomain(null);
while ((c = opt.getopt()) != -1) switch (c) {
case 'b':
domainstring=opt.getOptarg();
break;
case 'h':
default:
System.out.println(helpmsg);
System.exit(0);
} // getopt
new TestNetSwing(getDomain(domainstring),getPort(domainstring));
}
} // class TestNetSwing
/* EOF */
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