Add explicit Android VPN LAN routes

clients/android/app/build.gradle

@@ -30,8 +30,8 @@ android {
         applicationId "su.cin.rapvpn"
         minSdk 26
         targetSdk 35
-        versionCode 195
-        versionName "0.2.195"
+        versionCode 196
+        versionName "0.2.196"
         buildConfigField "String", "DEFAULT_BACKEND_URL", "\"${normalizeGradleString(defaultBackendUrl)}\""
         buildConfigField "String", "DEFAULT_CLUSTER_ID", "\"${normalizeGradleString(defaultClusterId)}\""
         buildConfigField "String", "DEFAULT_ORGANIZATION_ID", "\"${normalizeGradleString(defaultOrganizationId)}\""

clients/android/app/src/main/java/su/cin/rapvpn/RapDiagnosticService.java

@@ -441,6 +441,8 @@ public class RapDiagnosticService extends Service {
             result = runVPNPageProbe(params);
         } else if ("vpn_tcp_connect".equals(type) || "vpn_rdp_probe".equals(type)) {
             result = runVPNTCPConnect(params.optString("host", "192.168.200.95"), params.optInt("port", 3389), params.optInt("timeout_ms", 7000));
+        } else if ("vpn_tcp_connect_default".equals(type)) {
+            result = runDefaultTCPConnect(params.optString("host", "192.168.200.95"), params.optInt("port", 3389), params.optInt("timeout_ms", 7000));
         } else if ("vpn_dns_lookup".equals(type)) {
             result = runVPNDNSLookup(params.optString("host", "2ip.ru"));
         } else if ("open_url".equals(type)) {
@@ -1595,6 +1597,30 @@ public class RapDiagnosticService extends Service {
         }
     }
 
+    private String runDefaultTCPConnect(String host, int port, int timeoutMs) {
+        if (port <= 0 || port > 65535) {
+            return "vpn_tcp_connect_default " + host + ":" + port + " -> invalid port";
+        }
+        if (timeoutMs < 1000) {
+            timeoutMs = 1000;
+        }
+        if (timeoutMs > 30000) {
+            timeoutMs = 30000;
+        }
+        long started = System.currentTimeMillis();
+        try {
+            InetAddress address = InetAddress.getByName(host);
+            try (Socket socket = new Socket()) {
+                socket.connect(new InetSocketAddress(address, port), timeoutMs);
+                long elapsed = System.currentTimeMillis() - started;
+                return "vpn_tcp_connect_default " + host + ":" + port + " -> connected address=" + address.getHostAddress() + " local=" + socket.getLocalAddress().getHostAddress() + " ms=" + elapsed;
+            }
+        } catch (Exception e) {
+            long elapsed = System.currentTimeMillis() - started;
+            return "vpn_tcp_connect_default " + host + ":" + port + " -> " + e.getClass().getSimpleName() + ": " + e.getMessage() + " ms=" + elapsed;
+        }
+    }
+
     private Network waitForVPNNetwork(int timeoutMs) {
         long deadline = System.currentTimeMillis() + Math.max(0, timeoutMs);
         Network vpn;

clients/android/app/src/main/java/su/cin/rapvpn/RapVpnService.java

@@ -3878,6 +3878,9 @@ public class RapVpnService extends VpnService {
             LinkedHashSet<String> routes = new LinkedHashSet<>();
             if (fullTunnel) {
                 routes.add("0.0.0.0/0");
+                routes.add("10.0.0.0/8");
+                routes.add("172.16.0.0/12");
+                routes.add("192.168.0.0/16");
                 return routes;
             }
             routes.addAll(splitRoutes);