ext_hub_name.ConnectionIndex = connection_index;
if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
&ext_hub_name, sizeof(ext_hub_name),
&ext_hub_name, sizeof(ext_hub_name), &size, NULL))
return NULL;
ext_hub_name.ConnectionIndex = connection_index;
if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
&ext_hub_name, sizeof(ext_hub_name),
&ext_hub_name, sizeof(ext_hub_name), &size, NULL))
return NULL;