move the fix to the service side

Author: Feng Wang

src/windows/wslc/tasks/NetworkTasks.cpp

@@ -86,7 +86,10 @@ void CreateNetwork(CLIExecutionContext& context)
         options.Labels.push_back(validation::ParseLabel(label));
     }
 
-    options.Driver = context.Args.Contains(ArgType::Driver) ? WideToMultiByte(context.Args.Get<ArgType::Driver>()) : "bridge";
+    if (context.Args.Contains(ArgType::Driver))
+    {
+        options.Driver = WideToMultiByte(context.Args.Get<ArgType::Driver>());
+    }
 
     NetworkService::Create(context.Data.Get<Data::Session>(), options);
     PrintMessage(MultiByteToWide(options.Name));

src/windows/wslcsession/WSLCSession.cpp

@@ -2285,10 +2285,9 @@ try
 
     RETURN_HR_IF_NULL(E_POINTER, Options);
     RETURN_HR_IF_NULL(E_POINTER, Options->Name);
-    RETURN_HR_IF_NULL(E_POINTER, Options->Driver);
 
     std::string name = Options->Name;
-    std::string driver = Options->Driver;
+    std::string driver = (Options->Driver != nullptr && Options->Driver[0] != '\0') ? Options->Driver : WSLCBridgeNetworkDriver;
 
     ValidateName(name.c_str(), WSLC_MAX_NETWORK_NAME_LENGTH);