/** Handle incoming response here */
  public void notifyResponse(SipClientConnection scc) {
    int statusCode = 0;
    boolean received = false;
    try {
      scc.receive(0); // <i><b>fetch resent response</b></i>
      statusCode = scc.getStatusCode();
      str = new StringItem("Response: ", statusCode + " " + scc.getReasonPhrase());
      form.append(str);
      if (statusCode < 200) {
        dialog = scc.getDialog();
        form.append("Early-Dialog state: " + dialog.getState());
      }
      if (statusCode == 200) {
        String contentType = scc.getHeader("Content-Type");
        String contentLength = scc.getHeader("Content-Length");
        int length = Integer.parseInt(contentLength);
        if (contentType.equals("application/sdp")) {
          //
          // <i><b>handle SDP here</b></i>
          //
        }
        dialog = scc.getDialog(); // <i><b>save dialog info</b></i>
        form.append("Dialog state: " + dialog.getState());

        scc.initAck(); // <i><b>initialize and send ACK</b></i>
        scc.send();
        str = new StringItem("Session established: ", scc.getHeader("Call-ID"));
        form.append(str);
        scc.close();
      } else if (statusCode >= 300) {
        str = new StringItem("Session failed: ", scc.getHeader("Call-ID"));
        form.append(str);
        form.removeCommand(byeCmd);
        form.addCommand(restartCmd);
        scc.close();
      }
    } catch (IOException ioe) {
      // <i><b>handle e.g. transaction timeout here</b></i>
      str = new StringItem("No answer: ", ioe.getMessage());
      form.append(str);
      form.removeCommand(byeCmd);
      form.addCommand(restartCmd);
    }
  }
 /** end session with BYE */
 private void sendBYE() {
   if (dialog != null) {
     try {
       SipClientConnection sc = dialog.getNewClientConnection("BYE");
       sc.send();
       str = new StringItem("user hang-up: ", "BYE sent...");
       form.append(str);
       boolean gotit = sc.receive(10000);
       if (gotit) {
         if (sc.getStatusCode() == 200) {
           form.append("Session closed successfully...");
           form.append("Dialog state: " + dialog.getState());
         } else form.append("Error: " + sc.getReasonPhrase());
       }
       sc.close();
     } catch (IOException iox) {
       form.append("Exception: " + iox.getMessage());
     }
   } else {
     form.append("No dialog information!");
   }
 }