Function l2fwd_simple_crypto_enqueue

dpdk/examples/l2fwd-crypto/main.c:394–559

/* >8 End of crypto enqueue. */

static int
l2fwd_simple_crypto_enqueue(struct rte_mbuf *m,
		struct rte_crypto_op *op,
		struct l2fwd_crypto_params *cparams)
{
	struct rte_ether_hdr *eth_hdr;
	struct rte_ipv4_hdr *ip_hdr;

	uint32_t ipdata_offset, data_len;
	uint32_t pad_len = 0;
	char *padding;

	eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);

	if (eth_hdr->ether_type != rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4))
		return -1;

	ipdata_offset = sizeof(struct rte_ether_hdr);

	ip_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(m, char *) +
			ipdata_offset);

	ipdata_offset += (ip_hdr->version_ihl & RTE_IPV4_HDR_IHL_MASK)
			* RTE_IPV4_IHL_MULTIPLIER;


	/* Zero pad data to be crypto'd so it is block aligned */
	data_len  = rte_pktmbuf_data_len(m) - ipdata_offset;

	if ((cparams->do_hash || cparams->do_aead) && cparams->hash_verify)
		data_len -= cparams->digest_length;

	if (cparams->do_cipher) {
		/*
		 * Following algorithms are block cipher algorithms,
		 * and might need padding
		 */
		switch (cparams->cipher_algo) {
		case RTE_CRYPTO_CIPHER_AES_CBC:
		case RTE_CRYPTO_CIPHER_AES_ECB:
		case RTE_CRYPTO_CIPHER_DES_CBC:
		case RTE_CRYPTO_CIPHER_3DES_CBC:
		case RTE_CRYPTO_CIPHER_3DES_ECB:
			if (data_len % cparams->block_size)
				pad_len = cparams->block_size -
					(data_len % cparams->block_size);
			break;
		case RTE_CRYPTO_CIPHER_AES_XTS:
			if (cparams->cipher_dataunit_len != 0 &&
			    (data_len % cparams->cipher_dataunit_len))
				pad_len = cparams->cipher_dataunit_len -
					(data_len % cparams->cipher_dataunit_len);
			break;
		default:
			pad_len = 0;
		}

		if (pad_len) {