Change summary
src/main/java/eu/siacs/conversations/utils/DNSHelper.java | 47 ++++
src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java | 2
2 files changed, 41 insertions(+), 8 deletions(-)
Detailed changes
@@ -1,13 +1,21 @@
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.os.Build;
import android.os.Bundle;
import android.util.Log;
import java.io.IOException;
import java.net.InetAddress;
import java.net.SocketTimeoutException;
+import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Collections;
+import java.util.List;
import java.util.Random;
import java.util.TreeMap;
import java.util.regex.Pattern;
@@ -35,17 +43,42 @@ public class DNSHelper {
protected static Client client = new Client();
- public static Bundle getSRVRecord(final Jid jid) throws IOException {
+ public static Bundle getSRVRecord(final Jid jid, Context context) throws IOException {
final String host = jid.getDomainpart();
- String dns[] = client.findDNS();
- for (int i = 0; i < dns.length; ++i) {
- InetAddress ip = InetAddress.getByName(dns[i]);
- Bundle b = queryDNS(host, ip);
- if (b.containsKey("values") || i == dns.length - 1) {
+ final List<InetAddress> servers = Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? getDnsServers(context) : getDnsServersPreLolipop();
+ Bundle b = null;
+ for(InetAddress server : servers) {
+ b = queryDNS(host, server);
+ if (b.containsKey("values")) {
return b;
}
}
- return null;
+ return b;
+ }
+
+ @TargetApi(21)
+ private static List<InetAddress> getDnsServers(Context context) {
+ List<InetAddress> servers = new ArrayList<>();
+ ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+ Network[] networks = connectivityManager.getAllNetworks();
+ for(int i = 0; i < networks.length; ++i) {
+ LinkProperties linkProperties = connectivityManager.getLinkProperties(networks[i]);
+ servers.addAll(linkProperties.getDnsServers());
+ }
+ return servers.size() > 0 ? servers : getDnsServersPreLolipop();
+ }
+
+ private static List<InetAddress> getDnsServersPreLolipop() {
+ List<InetAddress> servers = new ArrayList<>();
+ String[] dns = client.findDNS();
+ for(int i = 0; i < dns.length; ++i) {
+ try {
+ servers.add(InetAddress.getByName(dns[i]));
+ } catch (UnknownHostException e) {
+ //ignore
+ }
+ }
+ return servers;
}
public static Bundle queryDNS(String host, InetAddress dnsServer) {
@@ -159,7 +159,7 @@ public class XmppConnection implements Runnable {
throw new UnknownHostException();
}
} else {
- final Bundle result = DNSHelper.getSRVRecord(account.getServer());
+ final Bundle result = DNSHelper.getSRVRecord(account.getServer(),mXmppConnectionService);
if (result == null) {
throw new IOException("unhandled exception in DNS resolver");
}