Function rte_vlan_strip

dpdk/lib/net/rte_ether.h:344–362

* Extract VLAN tag information into mbuf * * Software version of VLAN stripping * * @param m * The packet mbuf. * @return * - 0: Success * - 1: not a vlan packet */

 *   - 1: not a vlan packet
 */
static inline int rte_vlan_strip(struct rte_mbuf *m)
{
	struct rte_ether_hdr *eh
		 = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
	struct rte_vlan_hdr *vh;

	if (eh->ether_type != rte_cpu_to_be_16(RTE_ETHER_TYPE_VLAN))
		return -1;

	vh = (struct rte_vlan_hdr *)(eh + 1);
	m->ol_flags |= RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED;
	m->vlan_tci = rte_be_to_cpu_16(vh->vlan_tci);

	/* Copy ether header over rather than moving whole packet */
	memmove(rte_pktmbuf_adj(m, sizeof(struct rte_vlan_hdr)),
		eh, 2 * RTE_ETHER_ADDR_LEN);

	return 0;
}

/**
 * Insert VLAN tag into mbuf.