How to check VPN connection status on Android ICS

Question

I'm trying to register receiver, that will check VPN status. I have tried this: Get VPN Connection status on Android but looks like it no longer works on ICS. I have checked android source code for some clue, but with no luck, only noticed that in ISC there is nothing like: vpn.connectivity and connection_state - it use to be in android 2.3. Also tried using android.net.conn.CONNECTIVITY_CHANGE as my IntentFilter, but it doesn't react on VPN connection at all (of course I have added permission android.permission.ACCESS_NETWORK_STATE). I thought that it is simple thing to do, but I already run out of ideas how to do it... Could someone help me with this please?

score 2 · Answer 1 · edited May 23 '17 at 10:28

2

May be you can try to poll for DNS server changes. If it has changed then VPN has connected. However, I think there could be a lot of exception to this rule.

How do you get the current DNS servers for Android?

edited May 23 '17 at 10:28

Community

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answered May 18 '13 at 23:30

Victor Ronin

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score 0 · Answer 2 · answered Sep 12 '14 at 07:09

0

My solution is polling a NIC list.
# You can get the list by executing command "ls /sys/class/net".

If the list has "tun0", the device already has connected to VPN.

answered Sep 12 '14 at 07:09

user4033789

1

score 0 · Answer 3 · answered Feb 08 '16 at 16:47

NetworkCapabilities worked for me in API 21+. Unfortunately I haven't found a solution for 19-20. You have to loop over all existing networks and check which has VPN_TRANSPORT

ConnectivityManager cm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
Network[] networks = cm.getAllNetworks();

Log.i(TAG, "Network count: " + networks.length);
for(int i = 0; i < networks.length; i++) {

  NetworkCapabilities caps = cm.getNetworkCapabilities(networks[i]);

  Log.i(TAG, "Network " + i + ": " + networks[i].toString());
  Log.i(TAG, "VPN transport is: " + caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN));
  Log.i(TAG, "NOT_VPN capability is: " + caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VPN));

}

score 0 · Answer 4 · answered Mar 02 '16 at 07:49

for (Enumeration<NetworkInterface> en =
             NetworkInterface.getNetworkInterfaces(); en.hasMoreElements(); ) {
            NetworkInterface intf = en.nextElement();
            if (intf.getName().contains("tun0") || intf.getName().contains("ppp0")) {
                vpnInterface = intf;
                break;
            }
        }

For the VPNNetwork Interface

for (Enumeration<InetAddress> en =
                 vpnInterface.getInetAddresses(); en.hasMoreElements(); ) {
                InetAddress address = en.nextElement();
                if (!address.isLoopbackAddress()) {
                    String ip = address.getHostAddress();
                    break;
                }
            }

and the InetAddress

Thats everything I know by the moment now

To check if it's up etc. maybe

if (vpnInterface.isUp())

I do have implemented a code which calls itself after a serveral time and send a message to the ApplicationHandlers

How to check VPN connection status on Android ICS

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