Retry stale Android VPN WebSocket connects

clients/android/app/build.gradle

@@ -30,8 +30,8 @@ android {
         applicationId "su.cin.rapvpn"
         minSdk 26
         targetSdk 35
-        versionCode 189
-        versionName "0.2.189"
+        versionCode 190
+        versionName "0.2.190"
         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/VpnPacketWebSocketRelay.java

@@ -24,6 +24,7 @@ final class VpnPacketWebSocketRelay {
     private static final int MAX_PACKET_BATCH_PACKETS = 512;
     private static final int MAX_PACKET_BATCH_BYTES = 1024 * 1024;
     private static final int MAX_SINGLE_PACKET_BYTES = 65535;
+    private static final long CONNECTING_STALE_MS = 8000;
 
     private final String baseUrl;
     private final VpnService vpnService;
@@ -37,6 +38,7 @@ final class VpnPacketWebSocketRelay {
     private String connectedVpnConnectionId = "";
     private volatile boolean open;
     private volatile boolean connecting;
+    private volatile long connectingSinceMs;
     private volatile long reconnectAfterMs;
     private volatile String lastError = "";
 
@@ -87,8 +89,12 @@ final class VpnPacketWebSocketRelay {
                 return;
             }
             if (connecting && clusterId.equals(connectedClusterId) && vpnConnectionId.equals(connectedVpnConnectionId)) {
+                if (now - connectingSinceMs < CONNECTING_STALE_MS) {
                     return;
                 }
+                lastError = "stale websocket connect";
+                closeLocked();
+            }
             if (now < reconnectAfterMs) {
                 return;
             }
@@ -102,6 +108,7 @@ final class VpnPacketWebSocketRelay {
             connectedClusterId = clusterId;
             connectedVpnConnectionId = vpnConnectionId;
             connecting = true;
+            connectingSinceMs = now;
             Request.Builder requestBuilder = new Request.Builder().url(wsUrl);
             this.fabricServiceChannel.applyHeaders(requestBuilder);
             Request request = requestBuilder.build();
@@ -147,6 +154,7 @@ final class VpnPacketWebSocketRelay {
     private void closeLocked() {
         open = false;
         connecting = false;
+        connectingSinceMs = 0;
         incoming.clear();
         if (webSocket != null) {
             try {