+/* Fragment bits, used for IPv4 and IPv6, always zero for non-IP flows. */
+#define FLOW_FRAG_ANY (1 << 0) /* Set for any IP fragment. */
+#define FLOW_FRAG_LATER (1 << 1) /* Set for IP fragment with nonzero offset. */
+#define FLOW_FRAG_MASK (FLOW_FRAG_ANY | FLOW_FRAG_LATER)
+
+BUILD_ASSERT_DECL(FLOW_FRAG_ANY == NX_IP_FRAG_ANY);
+BUILD_ASSERT_DECL(FLOW_FRAG_LATER == NX_IP_FRAG_LATER);
+