| /* |
| * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.management.jmxremote; |
| |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.NetworkInterface; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.net.SocketException; |
| import java.rmi.server.RMIServerSocketFactory; |
| import java.util.Enumeration; |
| |
| /** |
| * This RMI server socket factory creates server sockets that |
| * will only accept connection requests from clients running |
| * on the host where the RMI remote objects have been exported. |
| */ |
| public final class LocalRMIServerSocketFactory implements RMIServerSocketFactory { |
| /** |
| * Creates a server socket that only accepts connection requests from |
| * clients running on the host where the RMI remote objects have been |
| * exported. |
| */ |
| public ServerSocket createServerSocket(int port) throws IOException { |
| return new ServerSocket(port) { |
| @Override |
| public Socket accept() throws IOException { |
| final Socket socket = super.accept(); |
| final InetAddress remoteAddr = socket.getInetAddress(); |
| final String msg = "The server sockets created using the " + |
| "LocalRMIServerSocketFactory only accept connections " + |
| "from clients running on the host where the RMI " + |
| "remote objects have been exported."; |
| |
| if (remoteAddr == null) { |
| // Though unlikeky, the socket could be already |
| // closed... Send a more detailed message in |
| // this case. Also avoid throwing NullPointerExceptiion |
| // |
| String details = ""; |
| if (socket.isClosed()) { |
| details = " Socket is closed."; |
| } else if (!socket.isConnected()) { |
| details = " Socket is not connected"; |
| } |
| try { |
| socket.close(); |
| } catch (Exception ok) { |
| // ok - this is just cleanup before throwing detailed |
| // exception. |
| } |
| throw new IOException(msg + |
| " Couldn't determine client address." + |
| details); |
| } else if (remoteAddr.isLoopbackAddress()) { |
| // local address: accept the connection. |
| return socket; |
| } |
| // Retrieve all the network interfaces on this host. |
| Enumeration<NetworkInterface> nis; |
| try { |
| nis = NetworkInterface.getNetworkInterfaces(); |
| } catch (SocketException e) { |
| try { |
| socket.close(); |
| } catch (IOException ioe) { |
| // Ignore... |
| } |
| throw new IOException(msg, e); |
| } |
| // Walk through the network interfaces to see |
| // if any of them matches the client's address. |
| // If true, then the client's address is local. |
| while (nis.hasMoreElements()) { |
| NetworkInterface ni = nis.nextElement(); |
| Enumeration<InetAddress> addrs = ni.getInetAddresses(); |
| while (addrs.hasMoreElements()) { |
| InetAddress localAddr = addrs.nextElement(); |
| if (localAddr.equals(remoteAddr)) { |
| return socket; |
| } |
| } |
| } |
| // The client's address is remote so refuse the connection. |
| try { |
| socket.close(); |
| } catch (IOException ioe) { |
| // Ignore... |
| } |
| throw new IOException(msg); |
| } |
| }; |
| } |
| |
| /** |
| * Two LocalRMIServerSocketFactory objects |
| * are equal if they are of the same type. |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| return (obj instanceof LocalRMIServerSocketFactory); |
| } |
| |
| /** |
| * Returns a hash code value for this LocalRMIServerSocketFactory. |
| */ |
| @Override |
| public int hashCode() { |
| return getClass().hashCode(); |
| } |
| } |