Function process_step1

dpdk/lib/ipsec/esp_inb.c:412–425

* Start with processing inbound packet. * This is common part for both tunnel and transport mode. * Extract information that will be needed later from mbuf metadata and * actual packet data: * - mbuf for packet's last segment * - length of the L2/L3 headers * - esp tail structure */

 * - esp tail structure
 */
static inline void
process_step1(struct rte_mbuf *mb, uint32_t tlen, struct rte_mbuf **ml,
	struct rte_esp_tail *espt, uint32_t *hlen, uint32_t *tofs)
{
	const struct rte_esp_tail *pt;
	uint32_t ofs;

	ofs = mb->pkt_len - tlen;
	hlen[0] = mb->l2_len + mb->l3_len;
	ml[0] = mbuf_get_seg_ofs(mb, &ofs);
	pt = rte_pktmbuf_mtod_offset(ml[0], const struct rte_esp_tail *, ofs);
	tofs[0] = ofs;
	espt[0] = pt[0];
}

/*
 * Helper function to check pad bytes values.