Update application state based on wg-quick

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/AndroidManifest.xml

@@ -43,13 +43,18 @@
             android:parentActivityName=".activity.MainActivity" />
 
         <receiver android:name=".BootShutdownReceiver">
-
             <intent-filter>
                 <action android:name="android.intent.action.ACTION_SHUTDOWN" />
                 <action android:name="android.intent.action.BOOT_COMPLETED" />
             </intent-filter>
         </receiver>
 
+        <receiver android:name=".backend.WgQuickBackend$WgQuickChangeReceiver">
+            <intent-filter>
+                <action android:name="com.wireguard.android.WGQUICK_CHANGE" />
+            </intent-filter>
+        </receiver>
+
         <service
             android:name=".backend.GoBackend$VpnService"
             android:permission="android.permission.BIND_VPN_SERVICE" >

app/src/main/java/com/wireguard/android/backend/WgQuickBackend.java

@@ -1,8 +1,11 @@
 package com.wireguard.android.backend;
 
+import android.content.BroadcastReceiver;
 import android.content.Context;
+import android.content.Intent;
 import android.util.Log;
 
+import com.wireguard.android.Application;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.Tunnel.State;
 import com.wireguard.android.model.Tunnel.Statistics;
@@ -111,4 +114,12 @@ public final class WgQuickBackend implements Backend {
         if (result != 0)
             throw new Exception("Unable to configure tunnel (wg-quick returned " + result + ')');
     }
+
+    public final static class WgQuickChangeReceiver extends BroadcastReceiver {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            Log.d(TAG, "Refreshing tunnel states");
+            Application.getComponent().getTunnelManager().refreshTunnelStates();
+        }
+    }
 }

app/src/main/java/com/wireguard/android/model/TunnelManager.java

@@ -128,6 +128,15 @@ public final class TunnelManager extends BaseObservable {
         return tunnels;
     }
 
+    public void refreshTunnelStates() {
+        asyncWorker.supplyAsync(backend::enumerate)
+                .thenAccept(running -> {
+                    for (final Tunnel tunnel : tunnels)
+                        tunnel.onStateChanged(running.contains(tunnel.getName()) ? State.UP : State.DOWN);
+                })
+                .whenComplete(ExceptionLoggers.E);
+    }
+
     public void onCreate() {
         asyncWorker.supplyAsync(configStore::enumerate)
                 .thenAcceptBoth(asyncWorker.supplyAsync(backend::enumerate), this::onTunnelsLoaded)

app/src/main/java/com/wireguard/android/util/RootShell.java

@@ -44,7 +44,7 @@ public class RootShell {
         final File cacheDir = context.getCacheDir();
         localBinaryDir = new File(cacheDir, "bin");
         localTemporaryDir = new File(cacheDir, "tmp");
-        preamble = String.format("export PATH=\"%s:$PATH\" TMPDIR='%s'; id -u\n",
+        preamble = String.format("export CALLING_PACKAGE=com.wireguard.android; export PATH=\"%s:$PATH\" TMPDIR='%s'; id -u\n",
                 localBinaryDir, localTemporaryDir);
     }
 

app/tools/wg-quick.c

@@ -446,6 +446,14 @@ static void set_config(const char *iface, const char *config)
 		exit(WIFEXITED(ret) ? WEXITSTATUS(ret) : EIO);
 }
 
+static void broadcast_change(void)
+{
+	const char *pkg = getenv("CALLING_PACKAGE");
+
+	if (!pkg || strcmp(pkg, "com.wireguard.android"))
+		cmd("am broadcast -a com.wireguard.android.WGQUICK_CHANGE com.wireguard.android");
+}
+
 static void print_search_paths(FILE *file, const char *prefix)
 {
 	_cleanup_free_ char *paths = strdup(WG_CONFIG_SEARCH_PATHS);
@@ -502,6 +510,7 @@ static void cmd_up(const char *iface, const char *config, unsigned int mtu, cons
 	set_dnses(netid, dnses);
 	set_routes(iface, netid);
 	set_mtu(iface, mtu);
+	broadcast_change();
 
 	free(cleanup_iface);
 	cleanup_iface = NULL;
@@ -528,6 +537,7 @@ static void cmd_down(const char *iface)
 	}
 
 	del_if(iface);
+	broadcast_change();
 	exit(EXIT_SUCCESS);
 }
 

app/tools/wireguard-go

@@ -1 +1 @@
-Subproject commit 14c6c9a7a4427bd5f07276b501e7f61ed3dbeb65
+Subproject commit 0715bdf353dd670bf7c3af332a8dabbe30187a1d