2 * esp_encrypt.c : IPSec ESP encrypt node using DPDK Cryptodev
4 * Copyright (c) 2017 Intel and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/vnet.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/ip/ip.h>
22 #include <vnet/ipsec/ipsec.h>
23 #include <vnet/ipsec/esp.h>
24 #include <vnet/udp/udp_local.h>
25 #include <dpdk/buffer.h>
26 #include <dpdk/ipsec/ipsec.h>
27 #include <vnet/ipsec/ipsec_tun.h>
28 #include <dpdk/device/dpdk.h>
29 #include <dpdk/device/dpdk_priv.h>
31 #define foreach_esp_encrypt_next \
32 _(DROP, "error-drop") \
33 _(IP4_LOOKUP, "ip4-lookup") \
34 _(IP6_LOOKUP, "ip6-lookup") \
35 _(INTERFACE_OUTPUT, "interface-output")
37 #define _(v, s) ESP_ENCRYPT_NEXT_##v,
40 foreach_esp_encrypt_next
45 #define foreach_esp_encrypt_error \
46 _(RX_PKTS, "ESP pkts received") \
47 _(SEQ_CYCLED, "Sequence number cycled") \
48 _(ENQ_FAIL, "Enqueue encrypt failed (queue full)") \
49 _(DISCARD, "Not enough crypto operations") \
50 _(SESSION, "Failed to get crypto session") \
51 _(NOSUP, "Cipher/Auth not supported")
56 #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
57 foreach_esp_encrypt_error
60 } esp_encrypt_error_t;
62 static char *esp_encrypt_error_strings[] = {
63 #define _(sym,string) string,
64 foreach_esp_encrypt_error
68 extern vlib_node_registration_t dpdk_esp4_encrypt_node;
69 extern vlib_node_registration_t dpdk_esp6_encrypt_node;
70 extern vlib_node_registration_t dpdk_esp4_encrypt_tun_node;
71 extern vlib_node_registration_t dpdk_esp6_encrypt_tun_node;
75 ipsec_crypto_alg_t crypto_alg;
76 ipsec_integ_alg_t integ_alg;
78 } esp_encrypt_trace_t;
80 /* packet trace format function */
82 format_esp_encrypt_trace (u8 * s, va_list * args)
84 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
85 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
86 esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
87 ip4_header_t *ih4 = (ip4_header_t *) t->packet_data;
88 u32 indent = format_get_indent (s), offset;
90 s = format (s, "cipher %U auth %U\n",
91 format_ipsec_crypto_alg, t->crypto_alg,
92 format_ipsec_integ_alg, t->integ_alg);
94 if ((ih4->ip_version_and_header_length & 0xF0) == 0x60)
96 s = format (s, "%U%U", format_white_space, indent,
97 format_ip6_header, ih4);
98 offset = sizeof (ip6_header_t);
102 s = format (s, "%U%U", format_white_space, indent,
103 format_ip4_header, ih4);
104 offset = ip4_header_bytes (ih4);
107 s = format (s, "\n%U%U", format_white_space, indent,
108 format_esp_header, t->packet_data + offset);
114 dpdk_esp_encrypt_inline (vlib_main_t * vm,
115 vlib_node_runtime_t * node,
116 vlib_frame_t * from_frame, int is_ip6, int is_tun)
118 u32 n_left_from, *from, *to_next, next_index, thread_index;
119 ipsec_main_t *im = &ipsec_main;
120 vnet_main_t *vnm = im->vnet_main;
121 vnet_interface_main_t *vim = &vnm->interface_main;
122 u32 thread_idx = vlib_get_thread_index ();
123 dpdk_crypto_main_t *dcm = &dpdk_crypto_main;
124 crypto_resource_t *res = 0;
126 crypto_alg_t *cipher_alg = 0, *auth_alg = 0;
127 struct rte_cryptodev_sym_session *session = 0;
128 u32 ret, last_sa_index = ~0;
129 u8 numa = rte_socket_id ();
131 crypto_worker_main_t *cwm =
132 vec_elt_at_index (dcm->workers_main, thread_idx);
133 struct rte_crypto_op **ops = cwm->ops;
135 from = vlib_frame_vector_args (from_frame);
136 n_left_from = from_frame->n_vectors;
137 thread_index = vm->thread_index;
139 ret = crypto_alloc_ops (numa, ops, n_left_from);
143 vlib_node_increment_counter (vm, dpdk_esp6_encrypt_node.index,
144 ESP_ENCRYPT_ERROR_DISCARD, n_left_from);
146 vlib_node_increment_counter (vm, dpdk_esp4_encrypt_node.index,
147 ESP_ENCRYPT_ERROR_DISCARD, n_left_from);
148 /* Discard whole frame */
149 vlib_buffer_free (vm, from, n_left_from);
153 next_index = ESP_ENCRYPT_NEXT_DROP;
155 while (n_left_from > 0)
159 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
161 while (n_left_from > 0 && n_left_to_next > 0)
165 vlib_buffer_t *b0, *b1;
167 ip4_and_esp_header_t *ih0, *oh0 = 0;
168 ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
169 ip4_and_udp_and_esp_header_t *ouh0 = 0;
177 u16 udp_encap_adv = 0;
178 struct rte_mbuf *mb0;
179 struct rte_crypto_op *op;
186 b0 = vlib_get_buffer (vm, bi0);
187 ih0 = vlib_buffer_get_current (b0);
188 mb0 = rte_mbuf_from_vlib_buffer (b0);
191 CLIB_PREFETCH (ih0, sizeof (ih6_0[0]), LOAD);
193 CLIB_PREFETCH (vlib_buffer_get_tail (b0), 20, STORE);
195 CLIB_PREFETCH (mb0, CLIB_CACHE_LINE_BYTES, STORE);
200 b1 = vlib_get_buffer (vm, bi1);
202 CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES, LOAD);
203 CLIB_PREFETCH (b1->data - CLIB_CACHE_LINE_BYTES,
204 CLIB_CACHE_LINE_BYTES, STORE);
209 ASSERT (op->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
211 dpdk_op_priv_t *priv = crypto_op_get_priv (op);
212 /* store bi in op private */
217 sizeof (op[0]) + sizeof (op[0].sym[0]) + sizeof (priv[0]);
218 CLIB_PREFETCH (op, op_len, STORE);
222 /* we are on a ipsec tunnel's feature arc */
223 vnet_buffer (b0)->ipsec.sad_index =
224 sa_index0 = ipsec_tun_protect_get_sa_out
225 (vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
228 sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
230 if (sa_index0 != last_sa_index)
232 sa0 = ipsec_sa_get (sa_index0);
235 vec_elt_at_index (dcm->cipher_algs, sa0->crypto_alg);
236 auth_alg = vec_elt_at_index (dcm->auth_algs, sa0->integ_alg);
238 is_aead = (cipher_alg->type == RTE_CRYPTO_SYM_XFORM_AEAD);
241 auth_alg = cipher_alg;
243 res_idx = get_resource (cwm, sa0);
245 if (PREDICT_FALSE (res_idx == (u16) ~ 0))
248 vlib_node_increment_counter (vm,
249 dpdk_esp6_encrypt_node.index,
250 ESP_ENCRYPT_ERROR_NOSUP, 1);
252 vlib_node_increment_counter (vm,
253 dpdk_esp4_encrypt_node.index,
254 ESP_ENCRYPT_ERROR_NOSUP, 1);
260 res = vec_elt_at_index (dcm->resource, res_idx);
262 error = crypto_get_session (&session, sa_index0, res, cwm, 1);
263 if (PREDICT_FALSE (error || !session))
266 vlib_node_increment_counter (vm,
267 dpdk_esp6_encrypt_node.index,
268 ESP_ENCRYPT_ERROR_SESSION,
271 vlib_node_increment_counter (vm,
272 dpdk_esp4_encrypt_node.index,
273 ESP_ENCRYPT_ERROR_SESSION,
281 last_sa_index = sa_index0;
284 if (PREDICT_FALSE (esp_seq_advance (sa0)))
287 vlib_node_increment_counter (vm,
288 dpdk_esp6_encrypt_node.index,
289 ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
291 vlib_node_increment_counter (vm,
292 dpdk_esp4_encrypt_node.index,
293 ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
301 orig_sz = b0->current_length;
303 /* TODO multi-seg support - total_length_not_including_first_buffer */
304 vlib_increment_combined_counter
305 (&ipsec_sa_counters, thread_index, sa_index0,
306 1, b0->current_length);
308 /* Update tunnel interface tx counters */
310 vlib_increment_combined_counter
311 (vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
312 thread_index, vnet_buffer (b0)->sw_if_index[VLIB_TX],
313 1, b0->current_length);
315 res->ops[res->n_ops] = op;
316 res->bi[res->n_ops] = bi0;
319 dpdk_gcm_cnt_blk *icb = &priv->cb;
321 crypto_set_icb (icb, sa0->salt, sa0->seq, sa0->seq_hi);
323 iv_size = cipher_alg->iv_len;
324 trunc_size = auth_alg->trunc_size;
326 /* if UDP encapsulation is used adjust the address of the IP header */
327 if (ipsec_sa_is_set_UDP_ENCAP (sa0) && !is_ip6)
328 udp_encap_adv = sizeof (udp_header_t);
330 if (ipsec_sa_is_set_IS_TUNNEL (sa0))
333 if (!ipsec_sa_is_set_IS_TUNNEL_V6 (sa0)) /* ip4 */
335 /* in tunnel mode send it back to FIB */
336 priv->next = DPDK_CRYPTO_INPUT_NEXT_IP4_LOOKUP;
337 u8 adv = sizeof (ip4_header_t) + udp_encap_adv +
338 sizeof (esp_header_t) + iv_size;
339 vlib_buffer_advance (b0, -adv);
340 oh0 = vlib_buffer_get_current (b0);
341 ouh0 = vlib_buffer_get_current (b0);
342 next_hdr_type = (is_ip6 ?
343 IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
345 * oh0->ip4.ip_version_and_header_length = 0x45;
346 * oh0->ip4.tos = ih0->ip4.tos;
347 * oh0->ip4.fragment_id = 0;
348 * oh0->ip4.flags_and_fragment_offset = 0;
350 oh0->ip4.checksum_data_64[0] =
351 clib_host_to_net_u64 (0x45ULL << 56);
353 * oh0->ip4.ttl = 254;
354 * oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
356 oh0->ip4.checksum_data_32[2] =
357 clib_host_to_net_u32 (0xfe320000);
359 oh0->ip4.src_address.as_u32 =
360 sa0->tunnel.t_src.ip.ip4.as_u32;
361 oh0->ip4.dst_address.as_u32 =
362 sa0->tunnel.t_dst.ip.ip4.as_u32;
364 if (ipsec_sa_is_set_UDP_ENCAP (sa0))
366 oh0->ip4.protocol = IP_PROTOCOL_UDP;
371 esp0->spi = clib_host_to_net_u32 (sa0->spi);
372 esp0->seq = clib_host_to_net_u32 (sa0->seq);
377 /* in tunnel mode send it back to FIB */
378 priv->next = DPDK_CRYPTO_INPUT_NEXT_IP6_LOOKUP;
381 sizeof (ip6_header_t) + sizeof (esp_header_t) + iv_size;
382 vlib_buffer_advance (b0, -adv);
383 ih6_0 = (ip6_and_esp_header_t *) ih0;
384 oh6_0 = vlib_buffer_get_current (b0);
386 next_hdr_type = (is_ip6 ?
387 IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
389 oh6_0->ip6.ip_version_traffic_class_and_flow_label =
390 ih6_0->ip6.ip_version_traffic_class_and_flow_label;
392 oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
393 oh6_0->ip6.hop_limit = 254;
394 oh6_0->ip6.src_address.as_u64[0] =
395 sa0->tunnel.t_src.ip.ip6.as_u64[0];
396 oh6_0->ip6.src_address.as_u64[1] =
397 sa0->tunnel.t_src.ip.ip6.as_u64[1];
398 oh6_0->ip6.dst_address.as_u64[0] =
399 sa0->tunnel.t_dst.ip.ip6.as_u64[0];
400 oh6_0->ip6.dst_address.as_u64[1] =
401 sa0->tunnel.t_dst.ip.ip6.as_u64[1];
403 oh6_0->esp.spi = clib_host_to_net_u32 (sa0->spi);
404 oh6_0->esp.seq = clib_host_to_net_u32 (sa0->seq);
407 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
409 else /* transport mode */
414 priv->next = DPDK_CRYPTO_INPUT_NEXT_MIDCHAIN;
418 priv->next = DPDK_CRYPTO_INPUT_NEXT_INTERFACE_OUTPUT;
419 rewrite_len = vnet_buffer (b0)->ip.save_rewrite_length;
421 u16 adv = sizeof (esp_header_t) + iv_size + udp_encap_adv;
422 vlib_buffer_advance (b0, -adv - rewrite_len);
423 u8 *src = ((u8 *) ih0) - rewrite_len;
424 u8 *dst = vlib_buffer_get_current (b0);
425 oh0 = vlib_buffer_get_current (b0) + rewrite_len;
426 ouh0 = vlib_buffer_get_current (b0) + rewrite_len;
430 orig_sz -= sizeof (ip6_header_t);
431 ih6_0 = (ip6_and_esp_header_t *) ih0;
432 next_hdr_type = ih6_0->ip6.protocol;
433 memmove (dst, src, rewrite_len + sizeof (ip6_header_t));
434 oh6_0 = (ip6_and_esp_header_t *) oh0;
435 oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
440 u16 ip_size = ip4_header_bytes (&ih0->ip4);
442 next_hdr_type = ih0->ip4.protocol;
443 memmove (dst, src, rewrite_len + ip_size);
444 oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
445 esp0 = (esp_header_t *) (((u8 *) oh0) + ip_size);
446 if (ipsec_sa_is_set_UDP_ENCAP (sa0))
448 oh0->ip4.protocol = IP_PROTOCOL_UDP;
449 esp0 = (esp_header_t *)
450 (((u8 *) oh0) + ip_size + udp_encap_adv);
454 oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
455 esp0 = (esp_header_t *) (((u8 *) oh0) + ip_size);
458 esp0->spi = clib_host_to_net_u32 (sa0->spi);
459 esp0->seq = clib_host_to_net_u32 (sa0->seq);
462 if (ipsec_sa_is_set_UDP_ENCAP (sa0) && ouh0)
464 ouh0->udp.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
465 ouh0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
466 ouh0->udp.checksum = 0;
468 ASSERT (is_pow2 (cipher_alg->boundary));
469 u16 mask = cipher_alg->boundary - 1;
470 u16 pad_payload_len = ((orig_sz + 2) + mask) & ~mask;
471 u8 pad_bytes = pad_payload_len - 2 - orig_sz;
474 vlib_buffer_put_uninit (b0, pad_bytes + 2 + trunc_size);
476 /* The extra pad bytes would be overwritten by the digest */
478 clib_memcpy_fast (padding, pad_data, 16);
480 f0 = (esp_footer_t *) (padding + pad_bytes);
481 f0->pad_length = pad_bytes;
482 f0->next_header = next_hdr_type;
486 u16 len = b0->current_length - sizeof (ip6_header_t);
487 oh6_0->ip6.payload_length =
488 clib_host_to_net_u16 (len - rewrite_len);
493 clib_host_to_net_u16 (b0->current_length - rewrite_len);
494 oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
495 if (ipsec_sa_is_set_UDP_ENCAP (sa0) && ouh0)
498 clib_host_to_net_u16 (clib_net_to_host_u16
500 ip4_header_bytes (&ouh0->ip4));
503 else /* should never happen */
504 clib_warning ("No outer header found for ESP packet");
506 b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
508 /* mbuf packet starts at ESP header */
509 mb0->data_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
510 mb0->pkt_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
511 mb0->data_off = ((void *) esp0) - mb0->buf_addr;
513 u32 cipher_off, cipher_len, auth_len = 0;
516 u8 *digest = vlib_buffer_get_tail (b0) - trunc_size;
517 u64 digest_paddr = mb0->buf_iova + digest - ((u8 *) mb0->buf_addr);
519 if (!is_aead && (cipher_alg->alg == RTE_CRYPTO_CIPHER_AES_CBC ||
520 cipher_alg->alg == RTE_CRYPTO_CIPHER_NULL))
522 cipher_off = sizeof (esp_header_t);
523 cipher_len = iv_size + pad_payload_len;
527 u32 *esp_iv = (u32 *) (esp0 + 1);
528 esp_iv[0] = sa0->seq;
529 esp_iv[1] = sa0->seq_hi;
531 cipher_off = sizeof (esp_header_t) + iv_size;
532 cipher_len = pad_payload_len;
537 aad = (u32 *) priv->aad;
540 /* aad[3] should always be 0 */
541 if (PREDICT_FALSE (ipsec_sa_is_set_USE_ESN (sa0)))
543 aad[1] = clib_host_to_net_u32 (sa0->seq_hi);
555 vlib_buffer_get_tail (b0) - ((u8 *) esp0) - trunc_size;
556 if (ipsec_sa_is_set_USE_ESN (sa0))
558 u32 *_digest = (u32 *) digest;
559 _digest[0] = clib_host_to_net_u32 (sa0->seq_hi);
564 crypto_op_setup (is_aead, mb0, op, session, cipher_off, cipher_len,
565 0, auth_len, (u8 *) aad, digest, digest_paddr);
568 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
570 esp_encrypt_trace_t *tr =
571 vlib_add_trace (vm, node, b0, sizeof (*tr));
572 tr->crypto_alg = sa0->crypto_alg;
573 tr->integ_alg = sa0->integ_alg;
574 u8 *p = vlib_buffer_get_current (b0);
575 if (!ipsec_sa_is_set_IS_TUNNEL (sa0) && !is_tun)
576 p += vnet_buffer (b0)->ip.save_rewrite_length;
577 clib_memcpy_fast (tr->packet_data, p, sizeof (tr->packet_data));
580 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
584 vlib_node_increment_counter (vm,
586 dpdk_esp6_encrypt_tun_node.index :
587 dpdk_esp6_encrypt_node.index),
588 ESP_ENCRYPT_ERROR_RX_PKTS,
589 from_frame->n_vectors);
591 crypto_enqueue_ops (vm, cwm, dpdk_esp6_encrypt_node.index,
592 ESP_ENCRYPT_ERROR_ENQ_FAIL, numa, 1 /* encrypt */ );
596 vlib_node_increment_counter (vm,
598 dpdk_esp4_encrypt_tun_node.index :
599 dpdk_esp4_encrypt_node.index),
600 ESP_ENCRYPT_ERROR_RX_PKTS,
601 from_frame->n_vectors);
603 crypto_enqueue_ops (vm, cwm, dpdk_esp4_encrypt_node.index,
604 ESP_ENCRYPT_ERROR_ENQ_FAIL, numa, 1 /* encrypt */ );
607 crypto_free_ops (numa, ops, cwm->ops + from_frame->n_vectors - ops);
609 return from_frame->n_vectors;
612 VLIB_NODE_FN (dpdk_esp4_encrypt_node) (vlib_main_t * vm,
613 vlib_node_runtime_t * node,
614 vlib_frame_t * from_frame)
616 return dpdk_esp_encrypt_inline (vm, node, from_frame, 0 /*is_ip6 */ , 0);
620 VLIB_REGISTER_NODE (dpdk_esp4_encrypt_node) = {
621 .name = "dpdk-esp4-encrypt",
622 .flags = VLIB_NODE_FLAG_IS_OUTPUT,
623 .vector_size = sizeof (u32),
624 .format_trace = format_esp_encrypt_trace,
625 .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
626 .error_strings = esp_encrypt_error_strings,
630 [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
635 VLIB_NODE_FN (dpdk_esp6_encrypt_node) (vlib_main_t * vm,
636 vlib_node_runtime_t * node,
637 vlib_frame_t * from_frame)
639 return dpdk_esp_encrypt_inline (vm, node, from_frame, 1 /*is_ip6 */ , 0);
643 VLIB_REGISTER_NODE (dpdk_esp6_encrypt_node) = {
644 .name = "dpdk-esp6-encrypt",
645 .flags = VLIB_NODE_FLAG_IS_OUTPUT,
646 .vector_size = sizeof (u32),
647 .format_trace = format_esp_encrypt_trace,
648 .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
649 .error_strings = esp_encrypt_error_strings,
653 [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
658 VLIB_NODE_FN (dpdk_esp4_encrypt_tun_node) (vlib_main_t * vm,
659 vlib_node_runtime_t * node,
660 vlib_frame_t * from_frame)
662 return dpdk_esp_encrypt_inline (vm, node, from_frame, 0 /*is_ip6 */ , 1);
666 VLIB_REGISTER_NODE (dpdk_esp4_encrypt_tun_node) = {
667 .name = "dpdk-esp4-encrypt-tun",
668 .flags = VLIB_NODE_FLAG_IS_OUTPUT,
669 .vector_size = sizeof (u32),
670 .format_trace = format_esp_encrypt_trace,
671 .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
672 .error_strings = esp_encrypt_error_strings,
676 [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
681 VLIB_NODE_FN (dpdk_esp6_encrypt_tun_node) (vlib_main_t * vm,
682 vlib_node_runtime_t * node,
683 vlib_frame_t * from_frame)
685 return dpdk_esp_encrypt_inline (vm, node, from_frame, 1 /*is_ip6 */ , 1);
689 VLIB_REGISTER_NODE (dpdk_esp6_encrypt_tun_node) = {
690 .name = "dpdk-esp6-encrypt-tun",
691 .flags = VLIB_NODE_FLAG_IS_OUTPUT,
692 .vector_size = sizeof (u32),
693 .format_trace = format_esp_encrypt_trace,
694 .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
695 .error_strings = esp_encrypt_error_strings,
699 [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
705 * fd.io coding-style-patch-verification: ON
708 * eval: (c-set-style "gnu")