IPv6 NS RS tests and fixes

[vpp.git] / src / vnet / interface_funcs.h

diff --git a/src/vnet/interface_funcs.h b/src/vnet/interface_funcs.h
index b84d151..ab808df 100644 (file)
--- a/src/vnet/interface_funcs.h
+++ b/src/vnet/interface_funcs.h
@@ -52,6 +52,14 @@ vnet_get_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
   return pool_elt_at_index (vnm->interface_main.sw_interfaces, sw_if_index);
 }
 
+always_inline vnet_sw_interface_t *
+vnet_get_sw_interface_safe (vnet_main_t * vnm, u32 sw_if_index)
+{
+  if (!pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
+    return pool_elt_at_index (vnm->interface_main.sw_interfaces, sw_if_index);
+  return (NULL);
+}
+
 always_inline vnet_sw_interface_t *
 vnet_get_hw_sw_interface (vnet_main_t * vnm, u32 hw_if_index)
 {