Function inb_cop_prepare

dpdk/lib/ipsec/esp_inb.c:58–133

* setup crypto op and crypto sym op for ESP inbound packet. */

 * setup crypto op and crypto sym op for ESP inbound packet.
 */
static inline void
inb_cop_prepare(struct rte_crypto_op *cop,
	const struct rte_ipsec_sa *sa, struct rte_mbuf *mb,
	const union sym_op_data *icv, uint32_t pofs, uint32_t plen)
{
	struct rte_crypto_sym_op *sop;
	struct aead_gcm_iv *gcm;
	struct aead_ccm_iv *ccm;
	struct aead_chacha20_poly1305_iv *chacha20_poly1305;
	struct aesctr_cnt_blk *ctr;
	uint64_t *ivc, *ivp;
	uint32_t algo;

	algo = sa->algo_type;
	ivp = rte_pktmbuf_mtod_offset(mb, uint64_t *,
		pofs + sizeof(struct rte_esp_hdr));

	/* fill sym op fields */
	sop = cop->sym;

	switch (algo) {
	case ALGO_TYPE_AES_GCM:
		sop_aead_prepare(sop, sa, icv, pofs, plen);

		/* fill AAD IV (located inside crypto op) */
		gcm = rte_crypto_op_ctod_offset(cop, struct aead_gcm_iv *,
			sa->iv_ofs);
		aead_gcm_iv_fill(gcm, ivp[0], sa->salt);
		break;
	case ALGO_TYPE_AES_CCM:
		sop_aead_prepare(sop, sa, icv, pofs, plen);

		/* fill AAD IV (located inside crypto op) */
		ccm = rte_crypto_op_ctod_offset(cop, struct aead_ccm_iv *,
			sa->iv_ofs);
		aead_ccm_iv_fill(ccm, ivp[0], sa->salt);
		break;
	case ALGO_TYPE_CHACHA20_POLY1305:
		sop_aead_prepare(sop, sa, icv, pofs, plen);

		/* fill AAD IV (located inside crypto op) */
		chacha20_poly1305 = rte_crypto_op_ctod_offset(cop,
				struct aead_chacha20_poly1305_iv *,
				sa->iv_ofs);
		aead_chacha20_poly1305_iv_fill(chacha20_poly1305,
					       ivp[0], sa->salt);
		break;
	case ALGO_TYPE_AES_CBC:
	case ALGO_TYPE_3DES_CBC:
		sop_ciph_auth_prepare(sop, sa, icv, pofs, plen);

		/* copy iv from the input packet to the cop */
		ivc = rte_crypto_op_ctod_offset(cop, uint64_t *, sa->iv_ofs);
		copy_iv(ivc, ivp, sa->iv_len);
		break;
	case ALGO_TYPE_AES_GMAC:
		sop_ciph_auth_prepare(sop, sa, icv, pofs, plen);