btpeeridbytedecoder.java

这是一个基于java编写的torrent的P2P源码

/*
 * Created on Nov 12, 2003
 * Created by Alon Rohter
 * Copyright (C) 2003-2004 Alon Rohter, All Rights Reserved.
 * Copyright (C) 2003, 2004, 2005, 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 com.aelitis.azureus.core.peermanager.utils;

import org.gudy.azureus2.core3.internat.MessageText;
import org.gudy.azureus2.core3.util.Constants;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.FileUtil;

import java.io.*;


/**
 * Used for identifying clients by their peerID.
 */
public class BTPeerIDByteDecoder {
	
	final static boolean LOG_UNKNOWN;
	
	static{
		String	prop = System.getProperty("log.unknown.peerids");
		
		LOG_UNKNOWN = prop != null && prop.equals("1");
	}
	 
  /**
   * Decodes the given peerID, returning an identification string.
   */  
  protected static String decode(byte[] peer_id) {   
    String decoded = null;
    byte[] peerID = new byte[peer_id.length];
    System.arraycopy(peer_id, 0, peerID, 0, peer_id.length);
            
    FileWriter log = null;
    File logFile = FileUtil.getUserFile("identification.log");
    
    int iFirstNonZeroPos = 0;
    try {
      if( (decoded = decodeAzStyle( peerID, "AZ", "Azureus" )) != null ) return decoded;      
      if( (decoded = decodeAzStyle( peerID, "BC", "BitComet" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "LT", "libtorrent (Rasterbar)" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "lt", "libTorrent (Rakshasa)" )) != null ) return decoded;
//      if( (decoded = decodeAzStyle( peerID, "AR", "Arctic Torrent" )) != null ) return decoded; //based on libtorrent but same peerid for different versions
      if( (decoded = decodeAzStyle( peerID, "TS", "TorrentStorm" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "MT", "MoonlightTorrent" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "XT", "XanTorrent" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "bk", "BitKitten (libtorrent)" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "CT", "CTorrent" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "SN", "ShareNET" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "BB", "BitBuddy" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "SS", "SwarmScope" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "BS", "BTSlave" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "BX", "BittorrentX" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "TN", "Torrent.NET" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "ZT", "ZipTorrent" )) != null ) return decoded; 
      if( (decoded = decodeAzStyle( peerID, "SZ", "Shareaza" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "KT", "KTorrent" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "UT", "\u00B5Torrent" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "TR", "Transmission" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "CD", "CTorrent" )) != null ) return decoded;      
      if( (decoded = decodeAzStyle( peerID, "RT", "Retriever" )) != null ) return decoded;      
      if( (decoded = decodeAzStyle( peerID, "LP", "Lphant" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "PC", "CacheLogic" )) != null ) return decoded;
      if( (decoded = decodeAzStyle( peerID, "BR", "BitRocket" )) != null ) return decoded;
      
      if( (decoded = decodeTornadoStyle( peerID, "T", "BitTornado" )) != null ) return decoded;
      if( (decoded = decodeTornadoStyle( peerID, "A", "ABC" )) != null ) return decoded;
      if( (decoded = decodeTornadoStyle( peerID, "O", "Osprey permaseed" )) != null ) return decoded;
      if( (decoded = decodeTornadoStyle( peerID, "R", "Tribler" )) != null ) return decoded;
     
      if( (decoded = decodeMainlineStyle( peerID, "M", "Mainline" )) != null ) return decoded;
      
      if( (decoded = decodeSimpleStyle( peerID, 0, "martini", "Martini Man" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "oernu", "BTugaXP" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "BTDWV-", "Deadman Walking" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "PRC.P---", "BitTorrent Plus! II" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "P87.P---", "BitTorrent Plus!" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "S587Plus", "BitTorrent Plus!" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 5, "Azureus", "Azureus 2.0.3.2" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "-G3", "G3 Torrent" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "-AR", "Arctic Torrent" )) != null ) return decoded; //no way to know the version (see above)
      if( (decoded = decodeSimpleStyle( peerID, 0, "-BF", "Bitflu" )) != null ) return decoded; //no way to know the version (see above)
      if( (decoded = decodeSimpleStyle( peerID, 4, "btfans", "SimpleBT" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "btuga", "BTugaXP" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 5, "BTuga", "BTugaXP" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "DansClient", "XanTorrent" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "Deadman Walking-", "Deadman" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "346-", "TorrentTopia" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "271-", "GreedBT 2.7.1" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 10, "BG", "BTGetit" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "OP", "Opera" )) != null ) return decoded;
      
      
      if( (decoded = decodeSimpleStyle( peerID, 0, "a00---0", "Swarmy" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "a02---0", "Swarmy" )) != null ) return decoded;
      if( (decoded = decodeSimpleStyle( peerID, 0, "T00---0", "Teeweety" )) != null ) return decoded;
      
      if( (decoded = decodeSimpleStyle( peerID, 0, "10-------", "JVtorrent" )) != null ) return decoded;

      if( (decoded = decodeSimpleStyle( peerID, 0, "LIME", "Limewire" )) != null ) return decoded;
      
      
      String burst = new String(peerID, 0, 5, Constants.BYTE_ENCODING);
      if( burst.equals( "Mbrst" ) ) {
        String major = new String(peerID, 5, 1, Constants.BYTE_ENCODING);
        String minor = new String(peerID, 7, 1, Constants.BYTE_ENCODING);
        String sub   = new String(peerID, 9, 1, Constants.BYTE_ENCODING);
        return "Burst! " + major + "." + minor + "." + sub;
      }
            
      String turbobt = new String(peerID, 0, 7, Constants.BYTE_ENCODING);
      if (turbobt.equals("turbobt")) {
        return "TurboBT " + new String(peerID, 7, 5, Constants.BYTE_ENCODING);
      }
      
      
      String btpd = new String( peerID, 0, 4, Constants.BYTE_ENCODING );
      if( btpd.equals( "btpd" ) ) {
      	return "BT Protocol Daemon " + new String( peerID, 5, 3, Constants.BYTE_ENCODING );
      }
      
      
      //not 100% sure on this one
      String plus = new String(peerID, 0, 4, Constants.BYTE_ENCODING);
      if( plus.equals( "Plus" ) ) {
        String v1 = new String(peerID, 4, 1, Constants.BYTE_ENCODING);
        String v2 = new String(peerID, 5, 1, Constants.BYTE_ENCODING);
        String v3 = new String(peerID, 6, 1, Constants.BYTE_ENCODING);
        return "Plus! " + v1 + "." + v2 + "." + v3;
      }
      
      String xbt = new String(peerID, 0, 3, Constants.BYTE_ENCODING);
      if( xbt.equals( "XBT" ) ) {
        String v1 = new String(peerID, 3, 1, Constants.BYTE_ENCODING);
        String v2 = new String(peerID, 4, 1, Constants.BYTE_ENCODING);
        String v3 = new String(peerID, 5, 1, Constants.BYTE_ENCODING);
        return "XBT " + v1 + "." + v2 + "." + v3;
      }
      
      String bow = new String(peerID, 1, 3, Constants.BYTE_ENCODING);
      if( bow.equals( "BOW" ) ) {
        String version = new String(peerID, 4, 3, Constants.BYTE_ENCODING);
        return "BitsOnWheels " + version;
      }
      
      String exeem = new String(peerID, 0, 2, Constants.BYTE_ENCODING);
      if( exeem.equals( "eX" ) ) {
        String user = new String(peerID, 2, 18, Constants.BYTE_ENCODING);
        return "eXeem [" +user+ "]";
      }
      
      
      String shadow = new String(peerID, 0, 1, Constants.BYTE_ENCODING);
      if (shadow.equals("S")) {
        try {
          if ( (peerID[6] == (byte)45) && (peerID[7] == (byte)45) && (peerID[8] == (byte)45) ) {
            String name = "Shad0w ";
            for (int i = 1; i < 3; i++) {
              String v = new String(peerID, i, 1, Constants.BYTE_ENCODING);
              name = name.concat( Integer.parseInt(v, 16) + "." );
            }
            String v = new String(peerID, 3, 1, Constants.BYTE_ENCODING);
            name = name.concat( "" + Integer.parseInt(v, 16) );
            return name;
          }
        
          if (peerID[8] == (byte)0) {
            String name = "Shad0w ";
            for (int i = 1; i < 3; i++) {
              name = name.concat(String.valueOf(peerID[i]) + ".");
            }
            name = name + String.valueOf(peerID[3]);
            return name;
          }
        }
        catch( Exception e ) {
          /* NumberFormatException, for peerid like [S-----------A---$H-"] */
        }
      }
      
	  	String bitspirit = new String(peerID, 2, 2, Constants.BYTE_ENCODING);
	  	if (bitspirit.equals("BS")) {
	  		if (peerID[1] == (byte)0)  return "BitSpirit v1";
	        if (peerID[1] == (byte)2)  return "BitSpirit v2";
      	}
            
      String upnp = new String(peerID, 0, 1, Constants.BYTE_ENCODING);
      if (upnp.equals("U")) {
        if (peerID[8] == (byte)45) {
          String version = new String(peerID, 1, 3, Constants.BYTE_ENCODING);
          String name = "UPnP ";
          for (int i = 0; i < 2; i++) {
            name = name.concat(version.charAt(i) + ".");
          }
          name = name + version.charAt(2);
          return name;
        }  
      }
      
      
      String bitcomet = new String(peerID, 0, 4, Constants.BYTE_ENCODING);
      if (bitcomet.equals("exbc") || bitcomet.equals("FUTB") || bitcomet.equals("xUTB")) {
      	String lord = new String(peerID, 6, 4, Constants.BYTE_ENCODING);
      	String name;
		if ( lord.equals( "LORD" ) ) {
			name = "BitLord ";
			String versionNumber = String.valueOf(peerID[4]);
			name = name.concat(versionNumber + ".");
			if (versionNumber.equals( "0" )) { // still follows the old BitComet decoding
				name = name.concat(String.valueOf(peerID[5]/10));
        		name = name.concat(String.valueOf(peerID[5]%10));
			} else {
				name = name.concat(String.valueOf(peerID[5]%10));
			}
        	
		} else {
			name = "BitComet ";
        	if ( bitcomet.equals("FUTB")) name = name.concat("Mod1 ");
        	if ( bitcomet.equals("xUTB")) name = name.concat("Mod2 ");
        	name = name.concat(String.valueOf(peerID[4]) + ".");
        	name = name.concat(String.valueOf(peerID[5]/10));
        	name = name.concat(String.valueOf(peerID[5]%10));
        }

        return name;
      }
      
      String rufus = new String(peerID, 2, 2, Constants.BYTE_ENCODING);
      if (rufus.equals("RS")) {
        String name = "Rufus ";
        name = name.concat(String.valueOf(peerID[0]) + ".");
        name = name.concat(String.valueOf(peerID[1]/10) + ".");
        name = name.concat(String.valueOf(peerID[1]%10));
        return name;
      }
    
      String mldonkey = new String(peerID, 1, 2, Constants.BYTE_ENCODING);
      if (mldonkey.equals("ML")) {
    	  String name = "mldonkey ";
    	  String v1 = new String(peerID, 3, 1, Constants.BYTE_ENCODING);
    	  String v2 = new String(peerID, 5, 1, Constants.BYTE_ENCODING);
    	  String v3 = new String(peerID, 7, 1, Constants.BYTE_ENCODING);
    	  return name + v1 + "." + v2 + "." + v3;
      }
            
      iFirstNonZeroPos = 20;
      for( int i=0; i < 20; i++ ) {
        if( peerID[i] != (byte)0 ) {
          iFirstNonZeroPos = i;
          break;
        }
      }