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/*
* Copyright (c) 2012-2018 Arne Schwabe
* Distributed under the GNU GPL v2 with additional terms. For full terms see the file doc/LICENSE.txt
*/
package de.blinkt.openvpn.core;
import android.annotation.SuppressLint;
import android.content.Context;
import android.net.*;
import android.os.Build;
import android.provider.Settings;
import android.text.TextUtils;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.util.Vector;
public class NetworkUtils {
public static Vector<String> getLocalNetworks(Context c, boolean ipv6) {
Vector<String> nets = new Vector<>();
ConnectivityManager conn = (ConnectivityManager) c.getSystemService(Context.CONNECTIVITY_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Network[] networks = conn.getAllNetworks();
for (Network network : networks) {
NetworkInfo ni = conn.getNetworkInfo(network);
LinkProperties li = conn.getLinkProperties(network);
NetworkCapabilities nc = conn.getNetworkCapabilities(network);
// Skip VPN networks like ourselves
if (nc.hasTransport(NetworkCapabilities.TRANSPORT_VPN))
continue;
// Also skip mobile networks
if (nc.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR))
continue;
for (LinkAddress la : li.getLinkAddresses()) {
if ((la.getAddress() instanceof Inet4Address && !ipv6) ||
(la.getAddress() instanceof Inet6Address && ipv6))
nets.add(la.toString());
}
}
} else {
// Old Android Version, use native utils via ifconfig instead
// Add local network interfaces
if (ipv6)
return nets;
String[] localRoutes = NativeUtils.getIfconfig();
// The format of mLocalRoutes is kind of broken because I don't really like JNI
for (int i = 0; i < localRoutes.length; i += 3) {
String intf = localRoutes[i];
String ipAddr = localRoutes[i + 1];
String netMask = localRoutes[i + 2];
if (intf == null || intf.equals("lo") ||
intf.startsWith("tun") || intf.startsWith("rmnet"))
continue;
if (ipAddr == null || netMask == null) {
VpnStatus.logError("Local routes are broken?! (Report to author) " + TextUtils.join("|", localRoutes));
continue;
}
nets.add(ipAddr + "/" + CIDRIP.calculateLenFromMask(netMask));
}
}
return nets;
}
@SuppressLint("HardwareIds")
public static String getFakeMacAddrFromSAAID(Context c) {
char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
String saaid = Settings.Secure.getString(c.getContentResolver(),
Settings.Secure.ANDROID_ID);
StringBuilder ret = new StringBuilder();
if (saaid.length() >= 6) {
byte[] sb = saaid.getBytes();
for (int b = 0; b <= 6; b++) {
if (b != 0)
ret.append(":");
int v = sb[b] & 0xFF;
ret.append(HEX_ARRAY[v >>> 4]);
ret.append(HEX_ARRAY[v & 0x0F]);
}
}
return ret.toString();
}
}
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