Merge branch 'android-offline-check'

3 files changed, 80 insertions, 0 deletions

diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/MullvadVpnService.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/MullvadVpnService.kt
index 67fe711a6c..91bc269ba2 100644
--- a/android/src/main/kotlin/net/mullvad/mullvadvpn/MullvadVpnService.kt
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/MullvadVpnService.kt
@@ -23,6 +23,7 @@ class MullvadVpnService : TalpidVpnService() {
     private lateinit var notificationManager: ForegroundNotificationManager
 
     override fun onCreate() {
+        super.onCreate()
         setUp()
         created.complete(Unit)
     }
@@ -47,6 +48,7 @@ class MullvadVpnService : TalpidVpnService() {
         tearDown()
         daemon.cancel()
         created.cancel()
+        super.onDestroy()
     }
 
     inner class LocalBinder : Binder() {
diff --git a/android/src/main/kotlin/net/mullvad/talpid/ConnectivityListener.kt b/android/src/main/kotlin/net/mullvad/talpid/ConnectivityListener.kt
new file mode 100644
index 0000000000..f0b6e2e923
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/talpid/ConnectivityListener.kt
@@ -0,0 +1,68 @@
+package net.mullvad.talpid
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.net.ConnectivityManager
+import android.net.NetworkInfo
+import android.net.NetworkInfo.DetailedState
+
+class ConnectivityListener : BroadcastReceiver() {
+    var isConnected = true
+        private set(value) {
+            field = value
+
+            if (senderAddress != 0L) {
+                notifyConnectivityChange(value, senderAddress)
+            }
+        }
+
+    var senderAddress = 0L
+
+    fun register(context: Context) {
+        val intentFilter = IntentFilter()
+
+        intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION)
+        context.registerReceiver(this, intentFilter)
+
+        checkConnectionState(context)
+    }
+
+    fun unregister(context: Context) {
+        context.unregisterReceiver(this)
+    }
+
+    override fun onReceive(context: Context, intent: Intent) {
+        val networkInfo =
+            intent.getParcelableExtra<NetworkInfo>(ConnectivityManager.EXTRA_NETWORK_INFO)
+
+        if (networkInfo.type != ConnectivityManager.TYPE_VPN) {
+            if (networkInfo.detailedState == DetailedState.DISCONNECTED) {
+                checkConnectionState(context)
+            } else if (networkInfo.detailedState == DetailedState.CONNECTED) {
+                isConnected = true
+            }
+        }
+    }
+
+    private fun checkConnectionState(context: Context) {
+        val connectivityManager =
+            context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+
+        isConnected = connectivityManager.allNetworks
+            .map({ network -> connectivityManager.getNetworkInfo(network) })
+            .any({ networkInfo ->
+                networkInfo.type != ConnectivityManager.TYPE_VPN &&
+                    networkInfo.detailedState == DetailedState.CONNECTED
+            })
+    }
+
+    private fun finalize() {
+        destroySender(senderAddress)
+        senderAddress = 0L
+    }
+
+    private external fun notifyConnectivityChange(isConnected: Boolean, senderAddress: Long)
+    private external fun destroySender(senderAddress: Long)
+}
diff --git a/android/src/main/kotlin/net/mullvad/talpid/TalpidVpnService.kt b/android/src/main/kotlin/net/mullvad/talpid/TalpidVpnService.kt
index 96de4082cc..185f401f7e 100644
--- a/android/src/main/kotlin/net/mullvad/talpid/TalpidVpnService.kt
+++ b/android/src/main/kotlin/net/mullvad/talpid/TalpidVpnService.kt
@@ -4,6 +4,16 @@ import android.net.VpnService
 import net.mullvad.talpid.tun_provider.TunConfig
 
 open class TalpidVpnService : VpnService() {
+    val connectivityListener = ConnectivityListener()
+
+    override fun onCreate() {
+        connectivityListener.register(this)
+    }
+
+    override fun onDestroy() {
+        connectivityListener.unregister(this)
+    }
+
     fun createTun(config: TunConfig): Int {
         val builder = Builder().apply {
             for (address in config.addresses) {