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Drop own implementation of DNS-Server selection

This commit is contained in:
Martin/Geno 2019-06-04 10:26:21 +02:00
parent 14d4e6aec8
commit 9a49c7c3c6
3 changed files with 0 additions and 187 deletions
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92
src/main/java/eu/siacs/conversations/utils/AndroidUsingExecLowPriority.java
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@ -1,92 +0,0 @@
/*
* 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 de.measite.minidns.dnsserverlookup.AbstractDNSServerLookupMechanism;
import de.measite.minidns.dnsserverlookup.AndroidUsingReflection;
import de.measite.minidns.dnsserverlookup.DNSServerLookupMechanism;
import de.measite.minidns.util.PlatformDetection;
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;
/**
* 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();
}
}

91
src/main/java/eu/siacs/conversations/utils/AndroidUsingLinkProperties.java
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@ -1,91 +0,0 @@
package eu.siacs.conversations.utils;
import android.annotation.TargetApi;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.LinkProperties;
import android.net.Network;
import android.net.NetworkInfo;
import android.net.RouteInfo;
import android.os.Build;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.List;
import de.measite.minidns.dnsserverlookup.AbstractDNSServerLookupMechanism;
import de.measite.minidns.dnsserverlookup.AndroidUsingExec;
public class AndroidUsingLinkProperties extends AbstractDNSServerLookupMechanism {
private final Context context;
protected AndroidUsingLinkProperties(Context context) {
super(AndroidUsingLinkProperties.class.getSimpleName(), AndroidUsingExec.PRIORITY - 1);
this.context = context;
}
@Override
public boolean isAvailable() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
}
@Override
@TargetApi(21)
public String[] getDnsServerAddresses() {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
Network[] networks = connectivityManager == null ? null : connectivityManager.getAllNetworks();
if (networks == null) {
return new String[0];
}
final Network activeNetwork = getActiveNetwork(connectivityManager);
List<String> servers = new ArrayList<>();
int vpnOffset = 0;
for(Network network : networks) {
LinkProperties linkProperties = connectivityManager.getLinkProperties(network);
if (linkProperties == null) {
continue;
}
NetworkInfo networkInfo = connectivityManager.getNetworkInfo(network);
final boolean isActiveNetwork = network.equals(activeNetwork);
if (networkInfo != null && isActiveNetwork && networkInfo.getType() == ConnectivityManager.TYPE_VPN) {
final List<String> tmp = getIPv4First(linkProperties.getDnsServers());
servers.addAll(0, tmp);
vpnOffset += tmp.size();
} else if (hasDefaultRoute(linkProperties) || isActiveNetwork) {
servers.addAll(vpnOffset, getIPv4First(linkProperties.getDnsServers()));
} else {
servers.addAll(getIPv4First(linkProperties.getDnsServers()));
}
}
return servers.toArray(new String[servers.size()]);
}
@TargetApi(23)
private static Network getActiveNetwork(ConnectivityManager cm) {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M ? cm.getActiveNetwork() : null;
}
private static List<String> getIPv4First(List<InetAddress> in) {
List<String> out = new ArrayList<>();
for(InetAddress addr : in) {
if (addr instanceof Inet4Address) {
out.add(0, addr.getHostAddress());
} else {
out.add(addr.getHostAddress());
}
}
return out;
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private static boolean hasDefaultRoute(LinkProperties linkProperties) {
for(RouteInfo route: linkProperties.getRoutes()) {
if (route.isDefaultRoute()) {
return true;
}
}
return false;
}
}

4
src/main/java/eu/siacs/conversations/utils/Resolver.java
View File

@ -17,7 +17,6 @@ import de.measite.minidns.DNSName;
import de.measite.minidns.Question;
import de.measite.minidns.Record;
import de.measite.minidns.dnssec.DNSSECResultNotAuthenticException;
import de.measite.minidns.dnsserverlookup.AndroidUsingExec;
import de.measite.minidns.hla.DnssecResolverApi;
import de.measite.minidns.hla.ResolverApi;
import de.measite.minidns.hla.ResolverResult;
@ -41,9 +40,6 @@ public class Resolver {
public static void init(XmppConnectionService service) {
Resolver.SERVICE = service;
DNSClient.removeDNSServerLookupMechanism(AndroidUsingExec.INSTANCE);
DNSClient.addDnsServerLookupMechanism(AndroidUsingExecLowPriority.INSTANCE);
DNSClient.addDnsServerLookupMechanism(new AndroidUsingLinkProperties(service));
final AbstractDNSClient client = ResolverApi.INSTANCE.getClient();
if (client instanceof ReliableDNSClient) {
disableHardcodedDnsServers((ReliableDNSClient) client);