+#define PKT_TX_TCP_SEG (1ULL << 49)
+
+/** TX packet is an UDP tunneled packet. It must be specified when using
+ * outer checksum offload (PKT_TX_OUTER_IP_CKSUM) */
+#define PKT_TX_UDP_TUNNEL_PKT (1ULL << 50) /**< TX packet is an UDP tunneled packet */
+#define PKT_TX_IEEE1588_TMST (1ULL << 51) /**< TX IEEE1588 packet to timestamp. */
+
+/**
+ * Bits 52+53 used for L4 packet type with checksum enabled: 00: Reserved,
+ * 01: TCP checksum, 10: SCTP checksum, 11: UDP checksum. To use hardware
+ * L4 checksum offload, the user needs to:
+ * - fill l2_len and l3_len in mbuf
+ * - set the flags PKT_TX_TCP_CKSUM, PKT_TX_SCTP_CKSUM or PKT_TX_UDP_CKSUM
+ * - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
+ * - calculate the pseudo header checksum and set it in the L4 header (only
+ * for TCP or UDP). See rte_ipv4_phdr_cksum() and rte_ipv6_phdr_cksum().
+ * For SCTP, set the crc field to 0.
+ */
+#define PKT_TX_L4_NO_CKSUM (0ULL << 52) /**< Disable L4 cksum of TX pkt. */
+#define PKT_TX_TCP_CKSUM (1ULL << 52) /**< TCP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_SCTP_CKSUM (2ULL << 52) /**< SCTP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_UDP_CKSUM (3ULL << 52) /**< UDP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_L4_MASK (3ULL << 52) /**< Mask for L4 cksum offload request. */
+
+#define PKT_TX_IP_CKSUM (1ULL << 54) /**< IP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_IPV4_CSUM PKT_TX_IP_CKSUM /**< Alias of PKT_TX_IP_CKSUM. */
+
+/** Packet is IPv4 without requiring IP checksum offload. */
+#define PKT_TX_IPV4 (1ULL << 55)
+
+/** Tell the NIC it's an IPv6 packet.*/
+#define PKT_TX_IPV6 (1ULL << 56)
+
+#define PKT_TX_VLAN_PKT (1ULL << 57) /**< TX packet is a 802.1q VLAN packet. */
+
+/** Outer IP checksum of TX packet, computed by NIC for tunneling packet.
+ * The tunnel type must also be specified, ex: PKT_TX_UDP_TUNNEL_PKT. */
+#define PKT_TX_OUTER_IP_CKSUM (1ULL << 58)
+
+/** Packet is outer IPv4 without requiring IP checksum offload for tunneling packet. */
+#define PKT_TX_OUTER_IPV4 (1ULL << 59)
+
+/** Tell the NIC it's an outer IPv6 packet for tunneling packet */
+#define PKT_TX_OUTER_IPV6 (1ULL << 60)
+
+/* Use final bit of flags to indicate a control mbuf */
+#define CTRL_MBUF_FLAG (1ULL << 63) /**< Mbuf contains control data */
+
+/**
+ * Get the name of a RX offload flag
+ *
+ * @param mask
+ * The mask describing the flag.
+ * @return
+ * The name of this flag, or NULL if it's not a valid RX flag.
+ */
+const char *rte_get_rx_ol_flag_name(uint64_t mask);
+
+/**
+ * Get the name of a TX offload flag
+ *
+ * @param mask
+ * The mask describing the flag. Usually only one bit must be set.
+ * Several bits can be given if they belong to the same mask.
+ * Ex: PKT_TX_L4_MASK.
+ * @return
+ * The name of this flag, or NULL if it's not a valid TX flag.
+ */
+const char *rte_get_tx_ol_flag_name(uint64_t mask);
+
+/* define a set of marker types that can be used to refer to set points in the
+ * mbuf */
+typedef void *MARKER[0]; /**< generic marker for a point in a structure */
+typedef uint8_t MARKER8[0]; /**< generic marker with 1B alignment */
+typedef uint64_t MARKER64[0]; /**< marker that allows us to overwrite 8 bytes
+ * with a single assignment */