/* * Created on 04-Jan-2006 * Created by Paul Gardner * Copyright (C) 2006 Aelitis, All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * This program 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 for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * AELITIS, SAS au capital de 46,603.30 euros * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France. * */ package org.gudy.azureus2.core3.util; import java.net.Inet6Address; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.URL; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; //import com.aelitis.azureus.core.AzureusCoreFactory; //import com.aelitis.azureus.core.instancemanager.AZInstance; //import com.aelitis.azureus.core.instancemanager.AZInstanceManager; //import com.aelitis.azureus.core.proxy.AEProxyFactory; public class AddressUtils { public static final byte LAN_LOCAL_MAYBE = 0; public static final byte LAN_LOCAL_YES = 1; public static final byte LAN_LOCAL_NO = 2; // private static AZInstanceManager instance_manager; private static Map host_map = null; public static URL adjustURL( URL url ) { // url = AEProxyFactory.getAddressMapper().internalise( url ); if ( host_map != null ){ String rewrite = (String)host_map.get( url.getHost()); if ( rewrite != null ){ String str = url.toExternalForm(); try{ int pos = str.indexOf( "//" ) + 2; int pos2 = str.indexOf( "/", pos ); String host_bit = str.substring( pos, pos2 ); int pos3 = host_bit.indexOf(':'); String port_bit; if ( pos3 == -1 ){ port_bit = ""; }else{ port_bit = host_bit.substring(pos3); } String new_str = str.substring(0,pos) + rewrite + port_bit + str.substring( pos2 ); url = new URL( new_str ); }catch( Throwable e ){ Debug.printStackTrace(e); } } } return( url ); } public static synchronized void addHostRedirect( String from_host, String to_host ) { System.out.println( "AddressUtils::addHostRedirect - " + from_host + " -> " + to_host ); Map new_map; if ( host_map == null ){ new_map = new HashMap(); }else{ new_map = new HashMap( host_map ); } new_map.put( from_host, to_host ); host_map = new_map; } public static InetSocketAddress adjustTCPAddress( InetSocketAddress address, boolean ext_to_lan ) { // return( adjustAddress( address, ext_to_lan, AZInstanceManager.AT_TCP )); return new InetSocketAddress(5555); } public static InetSocketAddress adjustUDPAddress( InetSocketAddress address, boolean ext_to_lan ) { // return( adjustAddress( address, ext_to_lan, AZInstanceManager.AT_UDP )); return new InetSocketAddress(5556); } public static InetSocketAddress adjustDHTAddress( InetSocketAddress address, boolean ext_to_lan ) { // return( adjustAddress( address, ext_to_lan, AZInstanceManager.AT_UDP_NON_DATA )); return new InetSocketAddress(6881); } // private static InetSocketAddress // adjustAddress( // InetSocketAddress address, // boolean ext_to_lan, // int port_type ) // { // if ( instance_manager == null ){ // // try{ // instance_manager = AzureusCoreFactory.getSingleton().getInstanceManager(); // // }catch( Throwable e ){ // // Debug.printStackTrace(e); // } // } // // if ( instance_manager == null || !instance_manager.isInitialized()){ // // return( address ); // } // // InetSocketAddress adjusted_address; // // if ( ext_to_lan ){ // // adjusted_address = instance_manager.getLANAddress( address, port_type ); // // }else{ // // adjusted_address = instance_manager.getExternalAddress( address, port_type ); // } // // if ( adjusted_address == null ){ // // adjusted_address = address; // // }else{ // // // System.out.println( "adj: " + address + "/" + ext_to_lan + " -> " + adjusted_address ); // } // // return( adjusted_address ); // } // // public static List // getLANAddresses( // String address ) // { // List result = new ArrayList(); // // result.add( address ); // // try{ // InetAddress ad = InetAddress.getByName( address ); // // if ( isLANLocalAddress( address ) != LAN_LOCAL_NO ){ // // if ( instance_manager == null ){ // // try{ // instance_manager = AzureusCoreFactory.getSingleton().getInstanceManager(); // // }catch( Throwable e ){ // // Debug.printStackTrace(e); // } // } // // if ( instance_manager == null || !instance_manager.isInitialized()){ // // return( result ); // } // // AZInstance[] instances = instance_manager.getOtherInstances(); // // for (int i=0;i<instances.length;i++){ // // AZInstance instance = instances[i]; // // List addresses = instance.getInternalAddresses(); // // if ( addresses.contains( ad )){ // // for ( int j=0; j<addresses.size();j++){ // // InetAddress ia = (InetAddress)addresses.get(j); // // String str = ia.getHostAddress(); // // if ( !result.contains( str )){ // // result.add( str ); // } // } // } // } // } // }catch( Throwable e ){ // // } // // return( result ); // } // // public static byte // isLANLocalAddress( // InetSocketAddress socket_address ) // { // InetAddress address = socket_address.getAddress(); // // return( isLANLocalAddress( address )); // } // // public static byte // isLANLocalAddress( // InetAddress address ) // // { // // if someone passes us an unresolved address then handle sensibly // // if ( address == null ){ // // return( LAN_LOCAL_NO ); // } // // if ( instance_manager == null ){ // // if ( AzureusCoreFactory.isCoreAvailable()){ // // try{ // instance_manager = AzureusCoreFactory.getSingleton().getInstanceManager(); // // }catch( Throwable e ){ // // Debug.printStackTrace(e); // } // } // } // // if ( instance_manager == null || !instance_manager.isInitialized()){ // // return( LAN_LOCAL_MAYBE ); // } // // return( instance_manager.isLANAddress( address )? LAN_LOCAL_YES:LAN_LOCAL_NO); // } // // // public static byte // isLANLocalAddress( // String address ) // { // byte is_lan_local = LAN_LOCAL_MAYBE; // // try { // is_lan_local = isLANLocalAddress( HostNameToIPResolver.syncResolve( address )); // // }catch( Throwable t ){ // // t.printStackTrace(); // } // // return is_lan_local; // } /** * checks if the provided address is a global-scope ipv6 unicast address */ public static boolean isGlobalAddressV6(InetAddress addr) { return addr instanceof Inet6Address && !addr.isAnyLocalAddress() && !addr.isLinkLocalAddress() && !addr.isLoopbackAddress() && !addr.isMulticastAddress() && !addr.isSiteLocalAddress() && !((Inet6Address)addr).isIPv4CompatibleAddress(); } public static boolean isTeredo(InetAddress addr) { if(!(addr instanceof Inet6Address)) return false; byte[] bytes = addr.getAddress(); // check for the 2001:0000::/32 prefix, i.e. teredo return bytes[0] == 0x20 && bytes[1] == 0x01 && bytes[2] == 0x00 && bytes[3] == 0x00; } public static boolean is6to4(InetAddress addr) { if(!(addr instanceof Inet6Address)) return false; byte[] bytes = addr.getAddress(); // check for the 2002::/16 prefix, i.e. 6to4 return bytes[0] == 0x20 && bytes[1] == 0x02; } /** * picks 1 global-scoped address out of a list based on the heuristic * "true" ipv6/tunnel broker > 6to4 > teredo * * @return null if no proper v6 address is found, best one otherwise */ public static InetAddress pickBestGlobalV6Address(List<InetAddress> addrs) { InetAddress bestPick = null; int currentRanking = 0; for(InetAddress addr : addrs) { if(!isGlobalAddressV6(addr)) continue; int ranking = 3; if(isTeredo(addr)) ranking = 1; else if(is6to4(addr)) ranking = 2; if(ranking > currentRanking) { bestPick = addr; currentRanking = ranking; } } return bestPick; } }