/* * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 2002 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by SuperBonBon Industries (http://www.sbbi.net/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "UPNPLib" and "SuperBonBon Industries" must not be * used to endorse or promote products derived from this software without * prior written permission. For written permission, please contact * info@sbbi.net. * * 5. Products derived from this software may not be called * "SuperBonBon Industries", nor may "SBBI" appear in their name, * without prior written permission of SuperBonBon Industries. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT,INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * This software consists of voluntary contributions made by many individuals * on behalf of SuperBonBon Industries. For more information on * SuperBonBon Industries, please see . */ package net.yacy.upnp; import java.net.*; import java.io.*; import java.util.*; import net.yacy.upnp.devices.*; import org.apache.commons.logging.*; /** * Class to discover an UPNP device on the network.
* A multicast socket will be created to discover devices, the binding port for this socket is set to 1901, * if this is causing a problem you can use the net.yacy.upnp.Discovery.bindPort system property * to specify another port. * The discovery methods only accept matching device description and broadcast message response IP * to avoid a security flaw with the protocol. If you are not happy with such behaviour * you can set the net.yacy.upnp.ddos.matchip system property to false to avoid this check. * @author SuperBonBon * @version 1.0 */ public class Discovery { private final static Log log = LogFactory.getLog( Discovery.class ); public final static String ROOT_DEVICES = "upnp:rootdevice"; public final static String ALL_DEVICES = "ssdp:all"; public static final int DEFAULT_MX = 3; public static final int DEFAULT_TTL = 4; public static final int DEFAULT_TIMEOUT = 1500; public static final String DEFAULT_SEARCH = ALL_DEVICES; public static final int DEFAULT_SSDP_SEARCH_PORT = 1901; public final static String SSDP_IP = "239.255.255.250"; public final static int SSDP_PORT = 1900; /** * Devices discovering on all network interfaces with default values, all root devices will be searched * @return an array of UPNP Root device or null if nothing found with the default timeout. * Null does NOT means that no UPNP device is available on the network. It only means * that for this default timeout no devices responded or that effectively no devices * are available at all. * @throws IOException if some IOException occurs during discovering */ public static UPNPRootDevice[] discover() throws IOException { return discover( DEFAULT_TIMEOUT, DEFAULT_TTL, DEFAULT_MX, DEFAULT_SEARCH ); } /** * Devices discovering on all network interfaces with a given root device to search * @param searchTarget the device URI to search * @return an array of UPNP Root device that matches the search or null if nothing found with the default timeout. * Null does NOT means that no UPNP device is available on the network. It only means * that for this given timeout no devices responded or that effectively no devices * are available at all. * @throws IOException if some IOException occurs during discovering */ public static UPNPRootDevice[] discover( String searchTarget ) throws IOException { return discover( DEFAULT_TIMEOUT, DEFAULT_TTL, DEFAULT_MX, searchTarget ); } /** * Devices discovering on all network interfaces with a given timeout and a given root device to search * @param timeOut the time allowed for a device to give a response * @param searchTarget the device URI to search * @return an array of UPNP Root device that matches the search or null if nothing found with the given timeout. * Null does NOT means that no UPNP device is available on the network. It only means * that for this given timeout no devices responded or that effectively no devices * are available at all. * @throws IOException if some IOException occurs during discovering */ public static UPNPRootDevice[] discover( int timeOut, String searchTarget ) throws IOException { return discover( timeOut, DEFAULT_TTL, DEFAULT_MX, searchTarget ); } /** * Devices discovering on all network interfaces with a given timeout and a given root device to search, as well as a ttl and mx param * @param timeOut the timeout for the a device to give a reponse * @param ttl the UDP socket packets time to live * @param mx discovery message mx http header field value * @param searchTarget the device URI to search * @return an array of UPNP Root device that matches the search or null if nothing found within the given timeout. * Null return does NOT means that no UPNP device is available on the network. It only means * that for this given timeout no devices responded or that effectively no devices * are available at all. * @throws IOException if some IOException occurs during discovering */ public static UPNPRootDevice[] discover( int timeOut, int ttl, int mx, String searchTarget ) throws IOException { return discoverDevices( timeOut, ttl, mx, searchTarget, null ); } /** * Devices discovering with a given timeout and a given root device to search on an given network interface, as well as a ttl and mx param * @param timeOut the timeout for the a device to give a reponse * @param ttl the UDP socket packets time to live * @param mx discovery message mx http header field value * @param searchTarget the device URI to search * @param ni the networkInterface where to search devices, null to lookup all interfaces * @return an array of UPNP Root device that matches the search or null if nothing found within the given timeout. * Null return does NOT means that no UPNP device is available on the network. It only means * that for this given timeout no devices responded or that effectively no devices * are available at all. * @throws IOException if some IOException occurs during discovering */ public static UPNPRootDevice[] discover( int timeOut, int ttl, int mx, String searchTarget, NetworkInterface ni ) throws IOException { return discoverDevices( timeOut, ttl, mx, searchTarget, ni ); } private static UPNPRootDevice[] discoverDevices( int timeOut, int ttl, int mx, String searchTarget, NetworkInterface ni ) throws IOException { if ( searchTarget == null || searchTarget.trim().length() == 0 ) { throw new IllegalArgumentException( "Illegal searchTarget" ); } final Map devices = new HashMap(); DiscoveryResultsHandler handler = new DiscoveryResultsHandler() { public void discoveredDevice( String usn, String udn, String nt, String maxAge, URL location, String firmware ) { synchronized( devices ) { if ( ! devices.containsKey( usn ) ) { try { UPNPRootDevice device = new UPNPRootDevice( location, maxAge, firmware, usn, udn ); devices.put( usn, device ); } catch ( Exception ex ) { log.error( "Error occured during upnp root device object creation from location " + location, ex ); } } } } }; DiscoveryListener.getInstance().registerResultsHandler( handler, searchTarget ); if ( ni == null ) { for ( Enumeration e = NetworkInterface.getNetworkInterfaces(); e.hasMoreElements(); ) { NetworkInterface intf = e.nextElement(); for ( Enumeration adrs = intf.getInetAddresses(); adrs.hasMoreElements(); ) { InetAddress adr = adrs.nextElement(); if ( adr instanceof Inet4Address && !adr.isLoopbackAddress() ) { sendSearchMessage( adr, ttl, mx, searchTarget ); } } } } else { for ( Enumeration adrs = ni.getInetAddresses(); adrs.hasMoreElements(); ) { InetAddress adr = adrs.nextElement(); if ( adr instanceof Inet4Address && !adr.isLoopbackAddress() ) { sendSearchMessage( adr, ttl, mx, searchTarget ); } } } try { Thread.sleep( timeOut ); } catch ( InterruptedException ex ) { // don't care } DiscoveryListener.getInstance().unRegisterResultsHandler( handler, searchTarget ); if ( devices.isEmpty() ) { return null; } int j = 0; UPNPRootDevice[] rootDevices = new UPNPRootDevice[devices.size()]; for ( Iterator i = devices.values().iterator(); i.hasNext(); ) { rootDevices[j++] = i.next(); } return rootDevices; } /** * Sends an SSDP search message on the network * @param src the sender ip * @param ttl the time to live * @param mx the mx field * @param searchTarget the search target * @throws IOException if some IO errors occurs during search */ public static void sendSearchMessage( InetAddress src, int ttl, int mx, String searchTarget ) throws IOException { int bindPort = DEFAULT_SSDP_SEARCH_PORT; String port = System.getProperty( "net.yacy.upnp.Discovery.bindPort" ); if ( port != null ) { bindPort = Integer.parseInt( port ); } InetSocketAddress adr = new InetSocketAddress( InetAddress.getByName( Discovery.SSDP_IP ), Discovery.SSDP_PORT ); java.net.MulticastSocket skt = new java.net.MulticastSocket( null ); skt.bind( new InetSocketAddress( src, bindPort ) ); skt.setTimeToLive( ttl ); StringBuilder packet = new StringBuilder(); packet.append( "M-SEARCH * HTTP/1.1\r\n" ); packet.append( "HOST: 239.255.255.250:1900\r\n" ); packet.append( "MAN: \"ssdp:discover\"\r\n" ); packet.append( "MX: ").append( mx ).append( "\r\n" ); packet.append( "ST: " ).append( searchTarget ).append( "\r\n" ).append( "\r\n" ); if ( log.isDebugEnabled() ) log.debug( "Sending discovery message on 239.255.255.250:1900 multicast address form ip " + src.getHostAddress() + ":\n" + packet.toString() ); String toSend = packet.toString(); byte[] pk = toSend.getBytes(); skt.send( new DatagramPacket( pk, pk.length, adr ) ); skt.disconnect(); skt.close(); } }