/*
* Copyright (C) 2013 Tobias Brunner
* Copyright (C) 2012 Christoph Buehler
* Copyright (C) 2012 Patrick Loetscher
* Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
package org.strongswan.android.logic.imc.collectors;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.strongswan.android.logic.imc.attributes.Attribute;
import org.strongswan.android.logic.imc.attributes.PortFilterAttribute;
public class PortFilterCollector implements Collector
{
private static Pattern LISTEN = Pattern.compile("\\bLISTEN\\b");
private static Pattern PROTOCOL = Pattern.compile("\\b(tcp|udp)6?\\b");
private static Pattern PORT = Pattern.compile("[:]{1,3}(\\d{1,5})\\b(?!\\.)");
@Override
public Attribute getMeasurement()
{
PortFilterAttribute attribute = null;
try
{
Process netstat = Runtime.getRuntime().exec("netstat -n");
try
{
BufferedReader reader = new BufferedReader(new InputStreamReader(netstat.getInputStream()));
String line;
attribute = new PortFilterAttribute();
while ((line = reader.readLine()) != null)
{
if (!LISTEN.matcher(line).find())
{
continue;
}
Matcher protocolMatcher = PROTOCOL.matcher(line);
Matcher portMatcher = PORT.matcher(line);
if (protocolMatcher.find() && portMatcher.find())
{
Protocol protocol = Protocol.fromName(protocolMatcher.group());
if (protocol == null)
{
continue;
}
int port = Integer.parseInt(portMatcher.group(1));
attribute.addPort(protocol, (short)port);
}
}
}
finally
{
netstat.destroy();
}
}
catch (IOException e)
{
e.printStackTrace();
}
return attribute;
}
}