93 lines
2.6 KiB
Java
93 lines
2.6 KiB
Java
/*
|
|
* Copyright 2015-2016 the original author or authors
|
|
*
|
|
* This software is licensed under the Apache License, Version 2.0,
|
|
* the GNU Lesser General Public License version 2 or later ("LGPL")
|
|
* and the WTFPL.
|
|
* You may choose either license to govern your use of this software only
|
|
* upon the condition that you accept all of the terms of either
|
|
* the Apache License 2.0, the LGPL 2.1+ or the WTFPL.
|
|
*/
|
|
package eu.siacs.conversations.utils;
|
|
|
|
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.InputStreamReader;
|
|
import java.io.LineNumberReader;
|
|
import java.net.InetAddress;
|
|
import java.util.HashSet;
|
|
import java.util.logging.Level;
|
|
|
|
import de.measite.minidns.dnsserverlookup.AbstractDNSServerLookupMechanism;
|
|
import de.measite.minidns.dnsserverlookup.AndroidUsingReflection;
|
|
import de.measite.minidns.dnsserverlookup.DNSServerLookupMechanism;
|
|
import de.measite.minidns.util.PlatformDetection;
|
|
|
|
/**
|
|
* Try to retrieve the list of DNS server by executing getprop.
|
|
*/
|
|
public class AndroidUsingExecLowPriority extends AbstractDNSServerLookupMechanism {
|
|
|
|
public static final DNSServerLookupMechanism INSTANCE = new AndroidUsingExecLowPriority();
|
|
public static final int PRIORITY = AndroidUsingReflection.PRIORITY + 1;
|
|
|
|
private AndroidUsingExecLowPriority() {
|
|
super(AndroidUsingExecLowPriority.class.getSimpleName(), PRIORITY);
|
|
}
|
|
|
|
@Override
|
|
public String[] getDnsServerAddresses() {
|
|
try {
|
|
Process process = Runtime.getRuntime().exec("getprop");
|
|
InputStream inputStream = process.getInputStream();
|
|
LineNumberReader lnr = new LineNumberReader(
|
|
new InputStreamReader(inputStream));
|
|
String line;
|
|
HashSet<String> server = new HashSet<>(6);
|
|
while ((line = lnr.readLine()) != null) {
|
|
int split = line.indexOf("]: [");
|
|
if (split == -1) {
|
|
continue;
|
|
}
|
|
String property = line.substring(1, split);
|
|
String value = line.substring(split + 4, line.length() - 1);
|
|
|
|
if (value.isEmpty()) {
|
|
continue;
|
|
}
|
|
|
|
if (property.endsWith(".dns") || property.endsWith(".dns1") ||
|
|
property.endsWith(".dns2") || property.endsWith(".dns3") ||
|
|
property.endsWith(".dns4")) {
|
|
|
|
// normalize the address
|
|
|
|
InetAddress ip = InetAddress.getByName(value);
|
|
|
|
if (ip == null) continue;
|
|
|
|
value = ip.getHostAddress();
|
|
|
|
if (value == null) continue;
|
|
if (value.length() == 0) continue;
|
|
|
|
server.add(value);
|
|
}
|
|
}
|
|
if (server.size() > 0) {
|
|
return server.toArray(new String[server.size()]);
|
|
}
|
|
} catch (IOException e) {
|
|
LOGGER.log(Level.WARNING, "Exception in findDNSByExec", e);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
public boolean isAvailable() {
|
|
return PlatformDetection.isAndroid();
|
|
}
|
|
|
|
}
|