Changes to allow the creation of a tunnel between two (or more) ivy

bussssseeeeezzzz

1 files changed, 140 insertions, 0 deletions

diff --git a/src/ProxyMaster.java b/src/ProxyMaster.java
new file mode 100644
index 0000000..7ed9460
--- /dev/null
+++ b/src/ProxyMaster.java
@@ -0,0 +1,140 @@
+/**
+ * ProxyMaster: Ivy relay, first attempt
+ *
+ * @author	Yannick Jestin
+ * @author	<a href="http://www.tls.cena.fr/products/ivy/">http://www.tls.cena.fr/products/ivy/</a>
+ *
+ * (c) ENAC
+ *
+ * changelog:
+ *   1.2.12
+ */
+package fr.dgac.ivy ;
+import java.io.*;
+import java.net.*;
+import java.util.* ;
+import gnu.getopt.Getopt;
+import org.apache.regexp.*;
+
+public class ProxyMaster {
+
+  private ServerSocket serviceSocket;
+  private boolean isRunning=false;
+  private static boolean debug=false;
+  private Vector proxyClients = new Vector();
+  private static int serial=0;
+
+  public static int DEFAULT_SERVICE_PORT = 3456 ;
+  public static final String DEFAULTNAME = "ProxyMaster";
+  public static final String helpmsg = "usage: java fr.dgac.ivy.ProxyMaster [options]\n\t-p\tport number, default "+DEFAULT_SERVICE_PORT+"\n\t-q\tquiet, no tty output\n\t-d\tdebug\n\t-h\thelp\nListens on the TCP port for ProxyClients to join.\n";
+
+  private static String name = DEFAULTNAME;
+  public static void main(String[] args) {
+    Ivy bus;
+    Getopt opt = new Getopt("ProxyMaster",args,"dqp:h");
+    int c;
+    int servicePort = DEFAULT_SERVICE_PORT;
+    boolean quiet = false;
+    while ((c = opt.getopt()) != -1) switch (c) {
+    case 'q':
+      quiet=true;
+      break;
+    case 'd':
+      Properties sysProp = System.getProperties();
+      sysProp.put("IVY_DEBUG","yes");
+      break;
+    case 'p':
+      String s="";
+      try {
+        servicePort = Integer.parseInt(s=opt.getOptarg());
+      } catch (NumberFormatException nfe) {
+        System.out.println("Invalid port number: " + s );
+	System.exit(0);
+      }
+      break;
+    case 'h':
+    default:
+      System.out.println(helpmsg);
+      System.exit(0);
+    }
+    try {
+      if (!quiet) System.out.println("listening on "+servicePort);
+      ProxyMaster pm = new ProxyMaster(servicePort);
+    } catch (IOException ioe) {
+      System.out.println("error, can't set up the proxy master");
+      ioe.printStackTrace();
+      System.exit(-1);
+    }
+  }
+
+  public ProxyMaster(int servicePort) throws IOException {
+    serviceSocket = new ServerSocket(servicePort) ;
+    while ( true ) {
+      try {
+        new SubReader(serviceSocket.accept());
+      } catch( IOException e ) {
+	traceDebug("TCP socket reader caught an exception " + e.getMessage());
+      }
+    }
+  }
+
+  class SubReader extends Thread {
+    BufferedReader in;
+    PrintWriter out;
+    SubReader(Socket socket) throws IOException {
+      proxyClients.addElement(this);
+      System.out.println("ProxyClient connected");
+      in=new BufferedReader(new InputStreamReader(socket.getInputStream()));
+      out=new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));
+      start();
+    }
+    public void send(String s) {
+      out.println(s);
+      out.flush();
+    }
+    public void run() {
+      traceDebug("Subreader Thread started");
+      String msg = null;
+      try {
+	while (true) {
+	  msg=in.readLine();
+	  if (msg==null) break;
+	  parseMsg(msg);
+	}
+      } catch (IOException ioe) {
+	traceDebug("Subreader exception ...");
+	ioe.printStackTrace();
+	System.exit(0);
+      }
+      traceDebug("Subreader Thread stopped");
+      System.out.println("ProxyClient disconnected");
+      proxyClients.removeElement(this);
+    }
+
+    RE getId=new RE("^GetID id=(.*)");
+    RE fwd=new RE("^Forward id=(.*) buffer=(.*)");
+    void parseMsg(String msg) {
+      System.out.println("parsing "+msg);
+      if (getId.match(msg)) {
+	// a new Ghost has appeared
+	System.out.println("a new Ghost has appeared");
+	int newGhostId = serial++;
+	out.println("ID id="+getId.getParen(1)+" value="+newGhostId);
+	out.flush();
+	// TODO create Puppets in each other ProxyClient
+	for (Enumeration e=proxyClients.elements();e.hasMoreElements();)
+	  ((SubReader)e.nextElement()).send("CreatePuppet id="+newGhostId);
+      } else if (fwd.match(msg)) {
+	System.out.println("forwarding "+msg);
+	// TODO forward the message to all relevant puppets
+      } else {
+	System.out.println("error unknown message "+msg);
+      }
+    }
+  } // class SubReader
+
+  private static void traceDebug(String s){
+    if (debug) System.out.println("-->ProxyMaster "+name+"<-- "+s);
+  }
+
+}