2 * esp_encrypt.c : IPSec ESP encrypt node
4 * Copyright (c) 2015 Cisco 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>
21 #include <vnet/udp/udp.h>
23 #include <vnet/crypto/crypto.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipsec/esp.h>
29 #define foreach_esp_encrypt_next \
30 _(DROP, "error-drop") \
31 _(HANDOFF, "handoff") \
32 _(INTERFACE_OUTPUT, "interface-output")
34 #define _(v, s) ESP_ENCRYPT_NEXT_##v,
37 foreach_esp_encrypt_next
42 #define foreach_esp_encrypt_error \
43 _(RX_PKTS, "ESP pkts received") \
44 _(SEQ_CYCLED, "sequence number cycled (packet dropped)") \
45 _(CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \
46 _(NO_BUFFERS, "no buffers (packet dropped)") \
50 #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
51 foreach_esp_encrypt_error
54 } esp_encrypt_error_t;
56 static char *esp_encrypt_error_strings[] = {
57 #define _(sym,string) string,
58 foreach_esp_encrypt_error
69 ipsec_crypto_alg_t crypto_alg;
70 ipsec_integ_alg_t integ_alg;
71 } esp_encrypt_trace_t;
73 /* packet trace format function */
75 format_esp_encrypt_trace (u8 * s, va_list * args)
77 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
78 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
79 esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
83 "esp: sa-index %d spi %u (0x%08x) seq %u sa-seq-hi %u crypto %U integrity %U%s",
84 t->sa_index, t->spi, t->spi, t->seq, t->sa_seq_hi,
85 format_ipsec_crypto_alg,
86 t->crypto_alg, format_ipsec_integ_alg, t->integ_alg,
87 t->udp_encap ? " udp-encap-enabled" : "");
91 /* pad packet in input buffer */
92 static_always_inline u8 *
93 esp_add_footer_and_icv (vlib_main_t * vm, vlib_buffer_t ** last,
94 u8 block_size, u8 icv_sz,
95 u16 * next, vlib_node_runtime_t * node,
96 u16 buffer_data_size, uword total_len)
98 static const u8 pad_data[ESP_MAX_BLOCK_SIZE] = {
99 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
100 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x00, 0x00,
103 u16 min_length = total_len + sizeof (esp_footer_t);
104 u16 new_length = round_pow2 (min_length, block_size);
105 u8 pad_bytes = new_length - min_length;
106 esp_footer_t *f = (esp_footer_t *) (vlib_buffer_get_current (last[0]) +
107 last[0]->current_length + pad_bytes);
108 u16 tail_sz = sizeof (esp_footer_t) + pad_bytes + icv_sz;
110 if (last[0]->current_length + tail_sz > buffer_data_size)
113 if (vlib_buffer_alloc (vm, &tmp_bi, 1) != 1)
116 vlib_buffer_t *tmp = vlib_get_buffer (vm, tmp_bi);
117 last[0]->next_buffer = tmp_bi;
118 last[0]->flags |= VLIB_BUFFER_NEXT_PRESENT;
119 f = (esp_footer_t *) (vlib_buffer_get_current (tmp) + pad_bytes);
120 tmp->current_length += tail_sz;
124 last[0]->current_length += tail_sz;
126 f->pad_length = pad_bytes;
129 ASSERT (pad_bytes <= ESP_MAX_BLOCK_SIZE);
130 pad_bytes = clib_min (ESP_MAX_BLOCK_SIZE, pad_bytes);
131 clib_memcpy_fast ((u8 *) f - pad_bytes, pad_data, pad_bytes);
134 return &f->next_header;
137 static_always_inline void
138 esp_update_ip4_hdr (ip4_header_t * ip4, u16 len, int is_transport, int is_udp)
143 len = clib_net_to_host_u16 (len);
144 old_len = ip4->length;
148 u8 prot = is_udp ? IP_PROTOCOL_UDP : IP_PROTOCOL_IPSEC_ESP;
150 sum = ip_csum_update (ip4->checksum, ip4->protocol,
151 prot, ip4_header_t, protocol);
152 ip4->protocol = prot;
154 sum = ip_csum_update (sum, old_len, len, ip4_header_t, length);
157 sum = ip_csum_update (ip4->checksum, old_len, len, ip4_header_t, length);
160 ip4->checksum = ip_csum_fold (sum);
163 static_always_inline void
164 esp_fill_udp_hdr (ipsec_sa_t * sa, udp_header_t * udp, u16 len)
166 clib_memcpy_fast (udp, &sa->udp_hdr, sizeof (udp_header_t));
167 udp->length = clib_net_to_host_u16 (len);
170 static_always_inline u8
171 ext_hdr_is_pre_esp (u8 nexthdr)
173 #ifdef CLIB_HAVE_VEC128
174 static const u8x16 ext_hdr_types = {
175 IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS,
176 IP_PROTOCOL_IPV6_ROUTE,
177 IP_PROTOCOL_IPV6_FRAGMENTATION,
180 return !u8x16_is_all_zero (ext_hdr_types == u8x16_splat (nexthdr));
182 return ((nexthdr ^ IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) |
183 (nexthdr ^ IP_PROTOCOL_IPV6_ROUTE) |
184 (nexthdr ^ IP_PROTOCOL_IPV6_FRAGMENTATION) != 0);
188 static_always_inline u8
189 esp_get_ip6_hdr_len (ip6_header_t * ip6, ip6_ext_header_t ** ext_hdr)
191 /* this code assumes that HbH, route and frag headers will be before
192 others, if that is not the case, they will end up encrypted */
193 u8 len = sizeof (ip6_header_t);
196 /* if next packet doesn't have ext header */
197 if (ext_hdr_is_pre_esp (ip6->protocol) == 0)
203 p = (void *) (ip6 + 1);
204 len += ip6_ext_header_len (p);
206 while (ext_hdr_is_pre_esp (p->next_hdr))
208 len += ip6_ext_header_len (p);
209 p = ip6_ext_next_header (p);
216 static_always_inline void
217 esp_process_chained_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
218 vnet_crypto_op_t * ops, vlib_buffer_t * b[],
219 u16 * nexts, vnet_crypto_op_chunk_t * chunks)
221 u32 n_fail, n_ops = vec_len (ops);
222 vnet_crypto_op_t *op = ops;
227 n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops);
231 ASSERT (op - ops < n_ops);
233 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
235 u32 bi = op->user_data;
236 b[bi]->error = node->errors[ESP_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR];
237 nexts[bi] = ESP_ENCRYPT_NEXT_DROP;
244 static_always_inline void
245 esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
246 vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts)
248 u32 n_fail, n_ops = vec_len (ops);
249 vnet_crypto_op_t *op = ops;
254 n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
258 ASSERT (op - ops < n_ops);
260 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
262 u32 bi = op->user_data;
263 b[bi]->error = node->errors[ESP_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR];
264 nexts[bi] = ESP_ENCRYPT_NEXT_DROP;
275 } __clib_packed esp_gcm_nonce_t;
277 STATIC_ASSERT_SIZEOF (esp_gcm_nonce_t, 12);
280 esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
281 vlib_frame_t * frame, int is_ip6, int is_tun)
283 ipsec_main_t *im = &ipsec_main;
284 ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, vm->thread_index);
285 u32 *from = vlib_frame_vector_args (frame);
286 u32 n_left = frame->n_vectors;
287 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
288 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
289 esp_gcm_nonce_t nonces[VLIB_FRAME_SIZE], *nonce = nonces;
290 u32 thread_index = vm->thread_index;
291 u16 buffer_data_size = vlib_buffer_get_default_data_size (vm);
292 u32 current_sa_index = ~0, current_sa_packets = 0;
293 u32 current_sa_bytes = 0, spi = 0;
294 u8 block_sz = 0, iv_sz = 0, icv_sz = 0;
296 vnet_crypto_op_chunk_t *ch;
298 vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
299 vnet_crypto_op_t **integ_ops = &ptd->integ_ops;
301 vlib_get_buffers (vm, from, b, n_left);
302 vec_reset_length (ptd->crypto_ops);
303 vec_reset_length (ptd->integ_ops);
304 vec_reset_length (ptd->chained_crypto_ops);
305 vec_reset_length (ptd->chained_integ_ops);
306 vec_reset_length (ptd->chunks);
313 u8 *payload, *next_hdr_ptr;
314 u16 payload_len, payload_len_total, n_bufs;
315 u32 hdr_len, config_index;
320 vlib_prefetch_buffer_header (b[2], LOAD);
321 p = vlib_buffer_get_current (b[1]);
322 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
323 p -= CLIB_CACHE_LINE_BYTES;
324 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
329 /* we are on a ipsec tunnel's feature arc */
330 config_index = b[0]->current_config_index;
331 vnet_feature_next_u16 (&next[0], b[0]);
332 vnet_buffer (b[0])->ipsec.sad_index =
333 sa_index0 = ipsec_tun_protect_get_sa_out
334 (vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
337 sa_index0 = vnet_buffer (b[0])->ipsec.sad_index;
339 if (sa_index0 != current_sa_index)
341 if (current_sa_packets)
342 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
346 current_sa_packets = current_sa_bytes = 0;
348 sa0 = pool_elt_at_index (im->sad, sa_index0);
349 current_sa_index = sa_index0;
350 spi = clib_net_to_host_u32 (sa0->spi);
351 block_sz = sa0->crypto_block_size;
352 icv_sz = sa0->integ_icv_size;
353 iv_sz = sa0->crypto_iv_size;
356 if (PREDICT_FALSE (~0 == sa0->encrypt_thread_index))
358 /* this is the first packet to use this SA, claim the SA
359 * for this thread. this could happen simultaneously on
361 clib_atomic_cmp_and_swap (&sa0->encrypt_thread_index, ~0,
362 ipsec_sa_assign_thread (thread_index));
365 if (PREDICT_TRUE (thread_index != sa0->encrypt_thread_index))
367 next[0] = ESP_ENCRYPT_NEXT_HANDOFF;
370 b[0]->current_config_index = config_index;
376 n_bufs = vlib_buffer_chain_linearize (vm, b[0]);
379 b[0]->error = node->errors[ESP_ENCRYPT_ERROR_NO_BUFFERS];
380 next[0] = ESP_ENCRYPT_NEXT_DROP;
386 crypto_ops = &ptd->chained_crypto_ops;
387 integ_ops = &ptd->chained_integ_ops;
389 /* find last buffer in the chain */
390 while (lb->flags & VLIB_BUFFER_NEXT_PRESENT)
391 lb = vlib_get_buffer (vm, lb->next_buffer);
395 crypto_ops = &ptd->crypto_ops;
396 integ_ops = &ptd->integ_ops;
399 if (PREDICT_FALSE (esp_seq_advance (sa0)))
401 b[0]->error = node->errors[ESP_ENCRYPT_ERROR_SEQ_CYCLED];
402 next[0] = ESP_ENCRYPT_NEXT_DROP;
409 if (ipsec_sa_is_set_IS_TUNNEL (sa0))
411 payload = vlib_buffer_get_current (b[0]);
412 next_hdr_ptr = esp_add_footer_and_icv (vm, &lb, block_sz, icv_sz,
415 vlib_buffer_length_in_chain
419 b[0]->error = node->errors[ESP_ENCRYPT_ERROR_NO_BUFFERS];
420 next[0] = ESP_ENCRYPT_NEXT_DROP;
423 b[0]->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
424 payload_len = b[0]->current_length;
425 payload_len_total = vlib_buffer_length_in_chain (vm, b[0]);
428 hdr_len += sizeof (*esp);
429 esp = (esp_header_t *) (payload - hdr_len);
431 /* optional UDP header */
432 if (ipsec_sa_is_set_UDP_ENCAP (sa0))
434 hdr_len += sizeof (udp_header_t);
435 esp_fill_udp_hdr (sa0, (udp_header_t *) (payload - hdr_len),
436 payload_len_total + hdr_len);
440 if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))
443 u16 len = sizeof (ip6_header_t);
445 ip6 = (ip6_header_t *) (payload - hdr_len);
446 clib_memcpy_fast (ip6, &sa0->ip6_hdr, len);
447 *next_hdr_ptr = (is_ip6 ?
448 IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
449 len = payload_len_total + hdr_len - len;
450 ip6->payload_length = clib_net_to_host_u16 (len);
455 u16 len = sizeof (ip4_header_t);
457 ip4 = (ip4_header_t *) (payload - hdr_len);
458 clib_memcpy_fast (ip4, &sa0->ip4_hdr, len);
459 *next_hdr_ptr = (is_ip6 ?
460 IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
461 len = payload_len_total + hdr_len;
462 esp_update_ip4_hdr (ip4, len, /* is_transport */ 0, 0);
468 next[0] = dpo->dpoi_next_node;
469 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
472 else /* transport mode */
474 u8 *l2_hdr, l2_len, *ip_hdr, ip_len;
475 ip6_ext_header_t *ext_hdr;
476 udp_header_t *udp = 0;
478 u8 *old_ip_hdr = vlib_buffer_get_current (b[0]);
481 esp_get_ip6_hdr_len ((ip6_header_t *) old_ip_hdr, &ext_hdr) :
482 ip4_header_bytes ((ip4_header_t *) old_ip_hdr);
484 vlib_buffer_advance (b[0], ip_len);
485 payload = vlib_buffer_get_current (b[0]);
486 next_hdr_ptr = esp_add_footer_and_icv (vm, &lb, block_sz, icv_sz,
489 vlib_buffer_length_in_chain
494 b[0]->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
495 payload_len = b[0]->current_length;
496 payload_len_total = vlib_buffer_length_in_chain (vm, b[0]);
499 hdr_len += sizeof (*esp);
500 esp = (esp_header_t *) (payload - hdr_len);
502 /* optional UDP header */
503 if (ipsec_sa_is_set_UDP_ENCAP (sa0))
505 hdr_len += sizeof (udp_header_t);
506 udp = (udp_header_t *) (payload - hdr_len);
511 ip_hdr = payload - hdr_len;
516 l2_len = vnet_buffer (b[0])->ip.save_rewrite_length;
518 l2_hdr = payload - hdr_len;
520 /* copy l2 and ip header */
521 clib_memcpy_le32 (l2_hdr, old_ip_hdr - l2_len, l2_len);
528 ip6_header_t *ip6 = (ip6_header_t *) (old_ip_hdr);
529 if (PREDICT_TRUE (NULL == ext_hdr))
531 *next_hdr_ptr = ip6->protocol;
532 ip6->protocol = IP_PROTOCOL_IPSEC_ESP;
536 *next_hdr_ptr = ext_hdr->next_hdr;
537 ext_hdr->next_hdr = IP_PROTOCOL_IPSEC_ESP;
539 ip6->payload_length =
540 clib_host_to_net_u16 (payload_len_total + hdr_len - l2_len -
541 sizeof (ip6_header_t));
546 ip4_header_t *ip4 = (ip4_header_t *) (old_ip_hdr);
547 *next_hdr_ptr = ip4->protocol;
548 len = payload_len_total + hdr_len - l2_len;
551 esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 1);
552 udp_len = len - ip_len;
555 esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 0);
558 clib_memcpy_le64 (ip_hdr, old_ip_hdr, ip_len);
562 esp_fill_udp_hdr (sa0, udp, udp_len);
566 next[0] = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
570 esp->seq = clib_net_to_host_u32 (sa0->seq);
572 if (sa0->crypto_enc_op_id)
574 vnet_crypto_op_t *op;
575 vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
576 vnet_crypto_op_init (op, sa0->crypto_enc_op_id);
578 op->src = op->dst = payload;
579 op->key_index = sa0->crypto_key_index;
580 op->len = payload_len - icv_sz;
581 op->user_data = b - bufs;
583 if (ipsec_sa_is_set_IS_AEAD (sa0))
586 * construct the AAD in a scratch space in front
589 op->aad = payload - hdr_len - sizeof (esp_aead_t);
591 esp_aad_fill (op, esp, sa0);
593 op->tag = payload + op->len;
596 u64 *iv = (u64 *) (payload - iv_sz);
597 nonce->salt = sa0->salt;
598 nonce->iv = *iv = clib_host_to_net_u64 (sa0->gcm_iv_counter++);
599 op->iv = (u8 *) nonce;
604 op->iv = payload - iv_sz;
605 op->flags = VNET_CRYPTO_OP_FLAG_INIT_IV;
611 vlib_buffer_t *cb = b[0];
612 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
613 op->chunk_index = vec_len (ptd->chunks);
614 op->tag = vlib_buffer_get_tail (lb) - icv_sz;
615 vec_add2 (ptd->chunks, ch, 1);
616 ch->len = payload_len;
617 ch->src = ch->dst = payload;
618 cb = vlib_get_buffer (vm, cb->next_buffer);
623 vec_add2 (ptd->chunks, ch, 1);
626 ch->len = cb->current_length - icv_sz;
628 ch->len = cb->current_length;
629 ch->src = ch->dst = vlib_buffer_get_current (cb);
631 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
634 cb = vlib_get_buffer (vm, cb->next_buffer);
639 if (sa0->integ_op_id)
641 vnet_crypto_op_t *op;
642 vec_add2_aligned (integ_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
643 vnet_crypto_op_init (op, sa0->integ_op_id);
644 op->src = payload - iv_sz - sizeof (esp_header_t);
645 op->digest = payload + payload_len - icv_sz;
646 op->key_index = sa0->integ_key_index;
647 op->digest_len = icv_sz;
648 op->len = payload_len - icv_sz + iv_sz + sizeof (esp_header_t);
649 op->user_data = b - bufs;
654 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
655 vlib_buffer_t *cb = b[0];
656 op->chunk_index = vec_len (ptd->chunks);
657 op->digest = vlib_buffer_get_tail (lb) - icv_sz;
658 vec_add2 (ptd->chunks, ch, 1);
659 ch->len = payload_len + iv_sz + sizeof (esp_header_t);
660 ch->src = payload - iv_sz - sizeof (esp_header_t);
661 cb = vlib_get_buffer (vm, cb->next_buffer);
666 vec_add2 (ptd->chunks, ch, 1);
670 ch->len = cb->current_length - icv_sz;
671 if (ipsec_sa_is_set_USE_ESN (sa0))
673 u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi);
674 clib_memcpy_fast (op->digest, &seq_hi,
676 ch->len += sizeof (seq_hi);
680 ch->len = cb->current_length;
681 ch->src = vlib_buffer_get_current (cb);
683 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
686 cb = vlib_get_buffer (vm, cb->next_buffer);
689 else if (ipsec_sa_is_set_USE_ESN (sa0))
691 u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi);
692 clib_memcpy_fast (op->digest, &seq_hi, sizeof (seq_hi));
693 op->len += sizeof (seq_hi);
697 vlib_buffer_advance (b[0], 0LL - hdr_len);
699 current_sa_packets += 1;
700 current_sa_bytes += payload_len_total;
703 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
705 esp_encrypt_trace_t *tr = vlib_add_trace (vm, node, b[0],
707 tr->sa_index = sa_index0;
710 tr->sa_seq_hi = sa0->seq_hi;
711 tr->udp_encap = ipsec_sa_is_set_UDP_ENCAP (sa0);
712 tr->crypto_alg = sa0->crypto_alg;
713 tr->integ_alg = sa0->integ_alg;
721 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
722 current_sa_index, current_sa_packets,
725 esp_process_ops (vm, node, ptd->crypto_ops, bufs, nexts);
726 esp_process_chained_ops (vm, node, ptd->chained_crypto_ops, bufs, nexts,
729 esp_process_ops (vm, node, ptd->integ_ops, bufs, nexts);
730 esp_process_chained_ops (vm, node, ptd->chained_integ_ops, bufs, nexts,
733 vlib_node_increment_counter (vm, node->node_index,
734 ESP_ENCRYPT_ERROR_RX_PKTS, frame->n_vectors);
736 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
737 return frame->n_vectors;
740 VLIB_NODE_FN (esp4_encrypt_node) (vlib_main_t * vm,
741 vlib_node_runtime_t * node,
742 vlib_frame_t * from_frame)
744 return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ , 0);
748 VLIB_REGISTER_NODE (esp4_encrypt_node) = {
749 .name = "esp4-encrypt",
750 .vector_size = sizeof (u32),
751 .format_trace = format_esp_encrypt_trace,
752 .type = VLIB_NODE_TYPE_INTERNAL,
754 .n_errors = ARRAY_LEN(esp_encrypt_error_strings),
755 .error_strings = esp_encrypt_error_strings,
757 .n_next_nodes = ESP_ENCRYPT_N_NEXT,
759 [ESP_ENCRYPT_NEXT_DROP] = "ip4-drop",
760 [ESP_ENCRYPT_NEXT_HANDOFF] = "esp4-encrypt-handoff",
761 [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output",
766 VLIB_NODE_FN (esp6_encrypt_node) (vlib_main_t * vm,
767 vlib_node_runtime_t * node,
768 vlib_frame_t * from_frame)
770 return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ , 0);
774 VLIB_REGISTER_NODE (esp6_encrypt_node) = {
775 .name = "esp6-encrypt",
776 .vector_size = sizeof (u32),
777 .format_trace = format_esp_encrypt_trace,
778 .type = VLIB_NODE_TYPE_INTERNAL,
780 .n_errors = ARRAY_LEN(esp_encrypt_error_strings),
781 .error_strings = esp_encrypt_error_strings,
783 .n_next_nodes = ESP_ENCRYPT_N_NEXT,
785 [ESP_ENCRYPT_NEXT_DROP] = "ip6-drop",
786 [ESP_ENCRYPT_NEXT_HANDOFF] = "esp6-encrypt-handoff",
787 [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output",
792 VLIB_NODE_FN (esp4_encrypt_tun_node) (vlib_main_t * vm,
793 vlib_node_runtime_t * node,
794 vlib_frame_t * from_frame)
796 return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ , 1);
800 VLIB_REGISTER_NODE (esp4_encrypt_tun_node) = {
801 .name = "esp4-encrypt-tun",
802 .vector_size = sizeof (u32),
803 .format_trace = format_esp_encrypt_trace,
804 .type = VLIB_NODE_TYPE_INTERNAL,
806 .n_errors = ARRAY_LEN(esp_encrypt_error_strings),
807 .error_strings = esp_encrypt_error_strings,
809 .n_next_nodes = ESP_ENCRYPT_N_NEXT,
811 [ESP_ENCRYPT_NEXT_DROP] = "ip4-drop",
812 [ESP_ENCRYPT_NEXT_HANDOFF] = "esp4-encrypt-tun-handoff",
813 [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "error-drop",
817 VNET_FEATURE_INIT (esp4_encrypt_tun_feat_node, static) =
819 .arc_name = "ip4-output",
820 .node_name = "esp4-encrypt-tun",
821 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
824 VNET_FEATURE_INIT (esp6o4_encrypt_tun_feat_node, static) =
826 .arc_name = "ip6-output",
827 .node_name = "esp4-encrypt-tun",
828 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
831 VNET_FEATURE_INIT (esp4_ethernet_encrypt_tun_feat_node, static) =
833 .arc_name = "ethernet-output",
834 .node_name = "esp4-encrypt-tun",
835 .runs_before = VNET_FEATURES ("adj-midchain-tx", "adj-midchain-tx-no-count"),
839 VLIB_NODE_FN (esp6_encrypt_tun_node) (vlib_main_t * vm,
840 vlib_node_runtime_t * node,
841 vlib_frame_t * from_frame)
843 return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ , 1);
847 VLIB_REGISTER_NODE (esp6_encrypt_tun_node) = {
848 .name = "esp6-encrypt-tun",
849 .vector_size = sizeof (u32),
850 .format_trace = format_esp_encrypt_trace,
851 .type = VLIB_NODE_TYPE_INTERNAL,
853 .n_errors = ARRAY_LEN(esp_encrypt_error_strings),
854 .error_strings = esp_encrypt_error_strings,
856 .n_next_nodes = ESP_ENCRYPT_N_NEXT,
858 [ESP_ENCRYPT_NEXT_DROP] = "ip6-drop",
859 [ESP_ENCRYPT_NEXT_HANDOFF] = "esp6-encrypt-tun-handoff",
860 [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "error-drop",
864 VNET_FEATURE_INIT (esp6_encrypt_tun_feat_node, static) =
866 .arc_name = "ip6-output",
867 .node_name = "esp6-encrypt-tun",
868 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
871 VNET_FEATURE_INIT (esp4o6_encrypt_tun_feat_node, static) =
873 .arc_name = "ip4-output",
874 .node_name = "esp6-encrypt-tun",
875 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
883 } esp_no_crypto_trace_t;
886 format_esp_no_crypto_trace (u8 * s, va_list * args)
888 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
889 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
890 esp_no_crypto_trace_t *t = va_arg (*args, esp_no_crypto_trace_t *);
892 s = format (s, "esp-no-crypto: sa-index %u", t->sa_index);
899 ESP_NO_CRYPTO_NEXT_DROP,
900 ESP_NO_CRYPTO_N_NEXT,
905 ESP_NO_CRYPTO_ERROR_RX_PKTS,
908 static char *esp_no_crypto_error_strings[] = {
909 "Outbound ESP packets received",
913 esp_no_crypto_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
914 vlib_frame_t * frame)
916 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
917 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
918 u32 *from = vlib_frame_vector_args (frame);
919 u32 n_left = frame->n_vectors;
921 vlib_get_buffers (vm, from, b, n_left);
928 /* packets are always going to be dropped, but get the sa_index */
929 sa_index0 = *(u32 *) vnet_feature_next_with_data (&next0, b[0],
932 next[0] = ESP_NO_CRYPTO_NEXT_DROP;
934 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
936 esp_no_crypto_trace_t *tr = vlib_add_trace (vm, node, b[0],
938 tr->sa_index = sa_index0;
946 vlib_node_increment_counter (vm, node->node_index,
947 ESP_NO_CRYPTO_ERROR_RX_PKTS, frame->n_vectors);
949 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
951 return frame->n_vectors;
954 VLIB_NODE_FN (esp4_no_crypto_tun_node) (vlib_main_t * vm,
955 vlib_node_runtime_t * node,
956 vlib_frame_t * from_frame)
958 return esp_no_crypto_inline (vm, node, from_frame);
962 VLIB_REGISTER_NODE (esp4_no_crypto_tun_node) =
964 .name = "esp4-no-crypto",
965 .vector_size = sizeof (u32),
966 .format_trace = format_esp_no_crypto_trace,
967 .n_errors = ARRAY_LEN(esp_no_crypto_error_strings),
968 .error_strings = esp_no_crypto_error_strings,
969 .n_next_nodes = ESP_NO_CRYPTO_N_NEXT,
971 [ESP_NO_CRYPTO_NEXT_DROP] = "ip4-drop",
975 VNET_FEATURE_INIT (esp4_no_crypto_tun_feat_node, static) =
977 .arc_name = "ip4-output",
978 .node_name = "esp4-no-crypto",
979 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
982 VLIB_NODE_FN (esp6_no_crypto_tun_node) (vlib_main_t * vm,
983 vlib_node_runtime_t * node,
984 vlib_frame_t * from_frame)
986 return esp_no_crypto_inline (vm, node, from_frame);
990 VLIB_REGISTER_NODE (esp6_no_crypto_tun_node) =
992 .name = "esp6-no-crypto",
993 .vector_size = sizeof (u32),
994 .format_trace = format_esp_no_crypto_trace,
995 .n_errors = ARRAY_LEN(esp_no_crypto_error_strings),
996 .error_strings = esp_no_crypto_error_strings,
997 .n_next_nodes = ESP_NO_CRYPTO_N_NEXT,
999 [ESP_NO_CRYPTO_NEXT_DROP] = "ip6-drop",
1003 VNET_FEATURE_INIT (esp6_no_crypto_tun_feat_node, static) =
1005 .arc_name = "ip6-output",
1006 .node_name = "esp6-no-crypto",
1007 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
1012 * fd.io coding-style-patch-verification: ON
1015 * eval: (c-set-style "gnu")