CODEWITHSUNDEEP
androidnetwork-programming
ZhouX
ZhouX

Reputation: 2176

Establishing VPN connection sets NetworkCapabilities.TRANSPORT_WIFI to false?

As the old way of detecting wifi connection (getNetworkInfo) is deprecated in android, I am trying to migrate my app to the latest way, below is what I have for now (in Kotlin):

fun isWifiConnected(context: Context): Boolean {
    val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager?
    cm?.activeNetwork?.let { network ->
        cm.getNetworkCapabilities(network)?.let { capability ->
            return capability.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
        }
    }
    return false
}

It works well until I get vpn connected (on my samsung s8 + shadowsocks), the capability in above code no longer has TRANSPORT_WIFI transport, but TRANSPORT_VPN instead. And if I connect vpn without wifi then get wifi connected, isWifiConnected returns true again (capability has both TRANSPORT_WIFI and TRANSPORT_VPN in this case).

It seems that the previous transport capabilities would all be reset to false when vpn connection gets established, which sounds like a bug to me, why having one new capability needs to reset old capabilities?

I was hoping this is just a bug of my vpn app (shadowsocks) but I tested same cases on my pixel 2 + shadowsocks, which works quite fine, isWifiConnected returns true as long as wifi is connected, no matter having vpn or not.

So this is a Samsung bug?

Upvotes: 3

Views: 910

Answers (1)

ZhouX
ZhouX

Reputation: 2176

The solution works well so far:

fun isWifiEnabled(context: Context): Boolean {
    val wm = context.getSystemService(Context.WIFI_SERVICE) as WifiManager?
    return wm?.isWifiEnabled ?: false
}

Upvotes: 1

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