/*
* Created on 19-Jul-2004
* Created by Paul Gardner
* Copyright (C) 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 org.gudy.azureus2.core3.ipfilter.impl;
/**
* @author parg
*
*/
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.config.ParameterListener;
import org.gudy.azureus2.core3.ipfilter.BadIps;
import org.gudy.azureus2.core3.ipfilter.IpFilter;
import org.gudy.azureus2.core3.ipfilter.IpFilterManager;
import org.gudy.azureus2.core3.ipfilter.IpRange;
import org.gudy.azureus2.core3.util.FileUtil;
public class
IpFilterManagerImpl
implements IpFilterManager, ParameterListener
{
protected static IpFilterManagerImpl singleton = new IpFilterManagerImpl();
private RandomAccessFile rafDescriptions = null;
/**
*
*/
public IpFilterManagerImpl() {
COConfigurationManager.addAndFireParameterListener(
"Ip Filter Enable Description Cache", this);
}
public Object addDescription(IpRange range, byte[] description) {
//if (true) return;
if (rafDescriptions == null) {
return null;
}
try {
if (description == null || description.length == 0)
return null;
int start;
int end;
start = (int)rafDescriptions.getFilePointer();
int len = (int)rafDescriptions.length();
//System.out.println(len - 0x1FFFFFF);
if (len + 61 >= 0x1FFFFFF) {
// we could try to fit a desc < 61, but why bother.. at this point
// we have at least 550,072 ranges
return null;
}
if (start != len) {
rafDescriptions.seek(len);
start = (int)rafDescriptions.getFilePointer();
}
// last 25: position
// 26 - 31 (6, 61 chars max): len
if (description.length <= 61) {
rafDescriptions.write(description);
} else {
rafDescriptions.write(description, 0, 61);
}
end = (int)rafDescriptions.getFilePointer();
//System.out.println("add " + new String(description, 0, (end - start)) + "; " + start + " - " + end);
int info = start + ((end - start) << 25);
return new Integer(info);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
public byte[] getDescription(Object info) {
// if cached, info is an object array, with the first index being the descr
if (info instanceof Object[]) {
return (byte[])(((Object[])info)[0]);
}
if (rafDescriptions == null || !(info instanceof Integer)) {
return "".getBytes();
}
try {
int posInfo = ((Integer)info).intValue();
int pos = posInfo & 0x1FFFFFF;
int len = posInfo >> 25;
if (len < 0) {
throw new IllegalArgumentException(getClass().getName() + ": invalid posInfo [" + posInfo +"], pos [" + pos + "], len [" + len + "]");
}
if (rafDescriptions.getFilePointer() != pos) {
rafDescriptions.seek(pos);
}
byte[] bytes = new byte[len];
rafDescriptions.read(bytes);
return bytes;
} catch (IOException e) {
return "".getBytes();
}
}
public void cacheAllDescriptions() {
IpRange[] ranges = getIPFilter().getRanges();
for (int i = 0; i < ranges.length; i++) {
Object info = ((IpRangeImpl)ranges[i]).getDescRef();
if (info instanceof Integer) {
byte[] desc = getDescription(info);
Object[] data = { desc, info };
((IpRangeImpl)ranges[i]).setDescRef(data);
}
}
}
public void clearDescriptionCache() {
IpRange[] ranges = getIPFilter().getRanges();
for (int i = 0; i < ranges.length; i++) {
Object info = ((IpRangeImpl)ranges[i]).getDescRef();
if (info instanceof Object[]) {
Integer data = (Integer)((Object[])info)[1];
((IpRangeImpl)ranges[i]).setDescRef(data);
}
}
}
public void deleteAllDescriptions() {
if (rafDescriptions != null) {
try {
rafDescriptions.close();
} catch (IOException e) {
}
rafDescriptions = null;
}
parameterChanged(null);
}
public static IpFilterManager
getSingleton()
{
return( singleton );
}
public IpFilter
getIPFilter()
{
return( IpFilterImpl.getInstance());
}
public BadIps
getBadIps()
{
return (BadIpsImpl.getInstance());
}
public void parameterChanged(String parameterName) {
boolean enable = COConfigurationManager.getBooleanParameter("Ip Filter Enable Description Cache");
if (enable && rafDescriptions == null) {
File fDescriptions = FileUtil.getUserFile("ipfilter.cache");
try {
if (fDescriptions.exists()) {
fDescriptions.delete();
}
rafDescriptions = new RandomAccessFile(fDescriptions, "rw");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else if (!enable && rafDescriptions != null) {
try {
rafDescriptions.close();
} catch (IOException e) {
}
rafDescriptions = null;
}
}
}