package bluej.debugger.jdi;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;

import bluej.utility.Debug;
import threadchecker.OnThread;
import threadchecker.Tag;




| A network test which logs diagnostics information.
|
| @author Davin McCall
|
@OnThread(Tag.Any)
public class NetworkTest
{       
public static void doTest()
   {
      Debug.message("Commencing network test...");
        
       
      InetAddress lhost = null;
       
      InetAddress[] lhostByName = new InetAddress[0];
        
       
      try {
      lhost = InetAddress.getLocalHost();
      Debug.message("Local host address = " + lhost.getHostAddress());
      Debug.message("Local host ip = " + lhost.getHostAddress());

      lhostByName = InetAddress.getAllByName("localhost");
           
      Debug.message("Addresses for 'localhost':");
           
      for (InetAddress name : lhostByName) {
         Debug.message(" -> " + name.getHostAddress());             
         }
      Debug.message("(end of list).");         
      }
       
   catch (UnknownHostException uhe) {
      Debug.message("(!!) UnknownHostException when getting local host address!");         
      }
        
   Debug.message("Creating unbound server socket...");
       
   try {
           
   ServerSocket ss = new ServerSocket();
   Debug.message("Successful.");
           
   try {
   ss.close();             
   }
           
catch (IOException ioe) {
}         
}
       
catch (IOException ioe) {
   Debug.message("(!!) Creation of server socket failed; message=" + ioe.getMessage());
   Debug.message("(!!) Exception class: " + ioe.getClass().getName());         
   }

       
InetAddress loop4addr = null;
       
InetAddress loop6addr = null;
        
       
try {
           
loop4addr = InetAddress.getByAddress(new byte[] {127, 0, 0, 1
});
testServerAddress(loop4addr);         
}
       
catch (UnknownHostException uhe) {
   Debug.message("(!!) 127.0.0.1 is unknown host: " + uhe.getMessage());         
   }

       
try {
           
loop6addr = InetAddress.getByAddress(new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                   
0, 0, 0, 0, 0, 1
});
testServerAddress(loop6addr);         
}
       
catch (UnknownHostException uhe) {
   Debug.message("(!!) ::1 is unknown host: " + uhe.getMessage());         
   }
        
if (lhost != null && !lhost.equals(loop4addr) && !lhost.equals(loop6addr)) {
   testServerAddress(lhost);         
   }
        
       
for (InetAddress name : lhostByName) {
   if (!name.equals(loop4addr) && !name.equals(loop6addr) && !name.equals(lhost)) {
      testServerAddress(name);             
      }         
   }        
        
Debug.message("Network test complete.");     
}
    
   



| Try to listen on a particular address, and connect to the server socket.
|
private static void testServerAddress(final InetAddress loopAddr)
   {
   Debug.message("Creating server socket bound to " + loopAddr.getHostAddress() + "...");
       
   try {
           
   final ServerSocket ss = new ServerSocket(0, 50, loopAddr);
   Debug.message("Successful.");
            
           
   Thread t = new Thread() {                
      @Override
      @OnThread(Tag.Worker)
               
      public void run()
               {                    
         try {
         Debug.message("Attempting to connect to " + loopAddr.getHostAddress() + ":" + ss.getLocalPort() + " with NO_PROXY...");
                       
         Socket s = new Socket(Proxy.NO_PROXY);
         s.setSoTimeout(300);
                       
         s.connect(new InetSocketAddress(loopAddr, ss.getLocalPort()));
         Debug.message("Successful.");
                        
         Debug.message("Attempting to connect to " + loopAddr.getHostAddress() + ":" + ss.getLocalPort() + "...");
                       
         s = new Socket();
         s.setSoTimeout(300);
                       
         s.connect(new InetSocketAddress(loopAddr, ss.getLocalPort()));
         Debug.message("Successful.");                     
         }
                   
      catch (IOException ioe) {
         Debug.message("(!!) Couldn't connect to local address: " + ioe.getMessage());
         Debug.message("(!!) Exception class: " + ioe.getClass().getName());                     
         }                 
      }             
   };
t.start();
           
ss.setSoTimeout(500); 
try {
ss.accept();
ss.accept();             
}
           
catch (IOException ioe) {
   Debug.message("(!!) Couldn't accept connection: " + ioe.getMessage());
   Debug.message("(!!) Exception class: " + ioe.getClass().getName());             
   }
            
           
try {
t.join(500);             
}
           
catch (InterruptedException ie) {
}
            
           
try {
ss.close();             
}
           
catch (IOException ioe) {
}         
}
       
catch (IOException ioe) {
   Debug.message("(!!) Creation of server socket failed; message=" + ioe.getMessage());
   Debug.message("(!!) Exception class: " + ioe.getClass().getName());         
   }     
} 
}