-/* VLIB buffer flags for ip4/ip6 packets. Set by input interfaces for ip4/ip6
- tcp/udp packets with hardware computed checksums. */
-#define LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED LOG2_VLIB_BUFFER_FLAG_USER(1)
-#define LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT LOG2_VLIB_BUFFER_FLAG_USER(2)
-#define IP_BUFFER_L4_CHECKSUM_COMPUTED (1 << LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED)
-#define IP_BUFFER_L4_CHECKSUM_CORRECT (1 << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT)
-
-/* VLAN header flags.
- * These bits are zeroed in vlib_buffer_init_for_free_list()
- * meaning wherever the buffer comes from they have a reasonable
- * value (eg, if ip4/ip6 generates the packet.)
- */
-#define LOG2_ETH_BUFFER_VLAN_2_DEEP LOG2_VLIB_BUFFER_FLAG_USER(3)
-#define LOG2_ETH_BUFFER_VLAN_1_DEEP LOG2_VLIB_BUFFER_FLAG_USER(4)
-#define ETH_BUFFER_VLAN_2_DEEP (1 << LOG2_ETH_BUFFER_VLAN_2_DEEP)
-#define ETH_BUFFER_VLAN_1_DEEP (1 << LOG2_ETH_BUFFER_VLAN_1_DEEP)
-#define ETH_BUFFER_VLAN_BITS (ETH_BUFFER_VLAN_1_DEEP | \
- ETH_BUFFER_VLAN_2_DEEP)
-
-#define LOG2_VNET_BUFFER_RTE_MBUF_VALID LOG2_VLIB_BUFFER_FLAG_USER(5)
-#define VNET_BUFFER_RTE_MBUF_VALID (1 << LOG2_VNET_BUFFER_RTE_MBUF_VALID)
-
-#define LOG2_BUFFER_HANDOFF_NEXT_VALID LOG2_VLIB_BUFFER_FLAG_USER(6)
-#define BUFFER_HANDOFF_NEXT_VALID (1 << LOG2_BUFFER_HANDOFF_NEXT_VALID)
+#define foreach_vnet_buffer_field \
+ _( 1, L4_CHECKSUM_COMPUTED) \
+ _( 2, L4_CHECKSUM_CORRECT) \
+ _( 3, VLAN_2_DEEP) \
+ _( 4, VLAN_1_DEEP) \
+ _( 8, SPAN_CLONE) \
+ _( 6, HANDOFF_NEXT_VALID) \
+ _( 7, LOCALLY_ORIGINATED) \
+ _( 8, IS_IP4) \
+ _( 9, IS_IP6) \
+ _(10, OFFLOAD_IP_CKSUM) \
+ _(11, OFFLOAD_TCP_CKSUM) \
+ _(12, OFFLOAD_UDP_CKSUM) \
+ _(13, IS_NATED)
+
+#define VNET_BUFFER_FLAGS_VLAN_BITS \
+ (VNET_BUFFER_F_VLAN_1_DEEP | VNET_BUFFER_F_VLAN_2_DEEP)
+
+enum
+{
+#define _(bit, name) VNET_BUFFER_F_##name = (1 << LOG2_VLIB_BUFFER_FLAG_USER(bit)),
+ foreach_vnet_buffer_field
+#undef _
+};