diff options
author | Christian Schneppe <christian@pix-art.de> | 2017-06-24 09:52:45 +0200 |
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committer | Christian Schneppe <christian@pix-art.de> | 2017-06-24 09:52:45 +0200 |
commit | 356c7bec9c2900242b16d99968cdcd78e674dee9 (patch) | |
tree | c44021992d825db96fcc4f84400cd63cc8d16450 /src/main/java/de/pixart/messenger/utils/AndroidUsingLinkProperties.java | |
parent | 8e897c3d69d65155a2fa7a4ce75bfc5bc13d7233 (diff) |
upgrade minidns. refactored dns utils
Diffstat (limited to 'src/main/java/de/pixart/messenger/utils/AndroidUsingLinkProperties.java')
-rw-r--r-- | src/main/java/de/pixart/messenger/utils/AndroidUsingLinkProperties.java | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/main/java/de/pixart/messenger/utils/AndroidUsingLinkProperties.java b/src/main/java/de/pixart/messenger/utils/AndroidUsingLinkProperties.java new file mode 100644 index 000000000..b201b354b --- /dev/null +++ b/src/main/java/de/pixart/messenger/utils/AndroidUsingLinkProperties.java @@ -0,0 +1,76 @@ +package de.pixart.messenger.utils; + +import android.annotation.TargetApi; +import android.content.Context; +import android.net.ConnectivityManager; +import android.net.LinkProperties; +import android.net.Network; +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]; + } + List<String> servers = new ArrayList<>(); + for (Network network : networks) { + LinkProperties linkProperties = connectivityManager.getLinkProperties(network); + if (linkProperties != null) { + if (hasDefaultRoute(linkProperties)) { + servers.addAll(0, getIPv4First(linkProperties.getDnsServers())); + } else { + servers.addAll(getIPv4First(linkProperties.getDnsServers())); + } + } + } + return servers.toArray(new String[servers.size()]); + } + + 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.toString()); + } else { + out.add(addr.toString()); + } + } + 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; + } +}
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