do {
			name = JOptionPane.showInputDialog(null, "input name", "");
			//send checkname
			send("CHECKNAME=="+name);
			System.out.println("sendname");

			do{
				try {
					//System.out.println("wait recieve");
					socket.receive(packet);
					rec = true;
				} catch (Exception ioe) {/* lazy exception handling :) */
				}
			}while(!rec);

			serverData = new String(buf);
			serverData = serverData.trim();

			System.out.println(serverData);
		} while ((name == null || name.equals("")) && !valid);