Stabilize VPN farm WebSocket dataplane

clients/android/app/build.gradle

@@ -30,8 +30,8 @@ android {
         applicationId "su.cin.rapvpn"
         minSdk 26
         targetSdk 35
-        versionCode 188
-        versionName "0.2.188"
+        versionCode 189
+        versionName "0.2.189"
         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/RapVpnService.java

@@ -1190,7 +1190,7 @@ public class RapVpnService extends VpnService {
     private void startPacketWebSocketRelay(String relayUrl, String clusterId, String vpnConnectionId) {
         try {
             VpnPacketWebSocketRelay old = packetWebSocketRelay;
-            if (old != null && !relayUrl.equals(old.baseUrl())) {
+            if (old != null && (!relayUrl.equals(old.baseUrl()) || !old.isOpen())) {
                 old.close();
                 packetWebSocketRelay = null;
             }

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

@@ -105,6 +105,7 @@ final class VpnPacketWebSocketRelay {
             Request.Builder requestBuilder = new Request.Builder().url(wsUrl);
             this.fabricServiceChannel.applyHeaders(requestBuilder);
             Request request = requestBuilder.build();
+            lastError = "connecting";
             webSocket = httpClient.newWebSocket(request, new Listener());
         }
     }
@@ -210,7 +211,11 @@ final class VpnPacketWebSocketRelay {
             open = false;
             connecting = false;
             reconnectAfterMs = System.currentTimeMillis() + 3000;
-            lastError = t == null ? "websocket failure" : t.getClass().getSimpleName() + ": " + t.getMessage();
+            String responseStatus = "";
+            if (response != null) {
+                responseStatus = " status=" + response.code();
+            }
+            lastError = (t == null ? "websocket failure" : t.getClass().getSimpleName() + ": " + t.getMessage()) + responseStatus;
             Log.w(TAG, "vpn packet websocket failed " + baseUrl + ": " + lastError);
         }
     }