+#define foreach_ip46_ping_result \
+ _ (OK, "OK") \
+ _ (ALLOC_FAIL, "packet allocation failed") \
+ _ (NO_INTERFACE, "no egress interface") \
+ _ (NO_TABLE, "no FIB table for lookup") \
+ _ (NO_SRC_ADDRESS, "no source address for egress interface") \
+ _ (NO_BUFFERS, "could not allocate a new buffer") \
+