Handle missing default gateways

Signed-off-by: Loren Eteval <loren.eteval@proton.me>

Furious/Action/Connect.py

@@ -909,6 +909,16 @@ class ConnectAction(Action):
             )
         )
 
+        if len(defaultGateway) == 0:
+            logger.error(f'no gateway address found')
+
+            self.coreRunning = False
+            self.disconnectReason = (
+                _('Unable to connect') + ': ' + _('No gateway address found')
+            )
+
+            return
+
         if len(defaultGateway) != 1:
             logger.error(f'found multiple gateway addresses: {defaultGateway}')
 

Furious/Utility/Translator.py

@@ -956,6 +956,11 @@ TRANSLATION = {
         'ZH': 'VPN模式已停止',
         'TW': 'VPN模式已停止',
     },
+    'No gateway address found': {
+        'ES': 'No se encontró ninguna dirección de puerta de enlace',
+        'ZH': '找不到网关地址',
+        'TW': '找不到網關地址',
+    },
     'Multiple gateway addresses found': {
         'ES': 'Se encontraron varias direcciones de puerta de enlace',
         'ZH': '找到多个网关地址',