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)") \
47 _(NO_TRAILER_SPACE, "no trailer space (packet dropped)")
51 #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
52 foreach_esp_encrypt_error
55 } esp_encrypt_error_t;
57 static char *esp_encrypt_error_strings[] = {
58 #define _(sym,string) string,
59 foreach_esp_encrypt_error
70 ipsec_crypto_alg_t crypto_alg;
71 ipsec_integ_alg_t integ_alg;
72 } esp_encrypt_trace_t;
74 /* packet trace format function */
76 format_esp_encrypt_trace (u8 * s, va_list * args)
78 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
79 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
80 esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
84 "esp: sa-index %d spi %u (0x%08x) seq %u sa-seq-hi %u crypto %U integrity %U%s",
85 t->sa_index, t->spi, t->spi, t->seq, t->sa_seq_hi,
86 format_ipsec_crypto_alg,
87 t->crypto_alg, format_ipsec_integ_alg, t->integ_alg,
88 t->udp_encap ? " udp-encap-enabled" : "");
92 /* pad packet in input buffer */
93 static_always_inline u8 *
94 esp_add_footer_and_icv (vlib_buffer_t * b, 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 (b) +
107 b->current_length + pad_bytes);
108 u16 tail_sz = sizeof (esp_footer_t) + pad_bytes + icv_sz;
110 if (b->current_data + tail_sz > buffer_data_size)
112 // TODO alloc new buffer
113 b->error = node->errors[ESP_ENCRYPT_ERROR_NO_TRAILER_SPACE];
114 next[0] = ESP_ENCRYPT_NEXT_DROP;
120 ASSERT (pad_bytes <= ESP_MAX_BLOCK_SIZE);
121 pad_bytes = clib_min (ESP_MAX_BLOCK_SIZE, pad_bytes);
122 clib_memcpy_fast ((u8 *) f - pad_bytes, pad_data, pad_bytes);
125 f->pad_length = pad_bytes;
126 b->current_length += tail_sz;
127 return &f->next_header;
130 static_always_inline void
131 esp_update_ip4_hdr (ip4_header_t * ip4, u16 len, int is_transport, int is_udp)
136 len = clib_net_to_host_u16 (len);
137 old_len = ip4->length;
141 u8 prot = is_udp ? IP_PROTOCOL_UDP : IP_PROTOCOL_IPSEC_ESP;
143 sum = ip_csum_update (ip4->checksum, ip4->protocol,
144 prot, ip4_header_t, protocol);
145 ip4->protocol = prot;
147 sum = ip_csum_update (sum, old_len, len, ip4_header_t, length);
150 sum = ip_csum_update (ip4->checksum, old_len, len, ip4_header_t, length);
153 ip4->checksum = ip_csum_fold (sum);
156 static_always_inline void
157 esp_fill_udp_hdr (ipsec_sa_t * sa, udp_header_t * udp, u16 len)
159 clib_memcpy_fast (udp, &sa->udp_hdr, sizeof (udp_header_t));
160 udp->length = clib_net_to_host_u16 (len);
163 static_always_inline u8
164 ext_hdr_is_pre_esp (u8 nexthdr)
166 #ifdef CLIB_HAVE_VEC128
167 static const u8x16 ext_hdr_types = {
168 IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS,
169 IP_PROTOCOL_IPV6_ROUTE,
170 IP_PROTOCOL_IPV6_FRAGMENTATION,
173 return !u8x16_is_all_zero (ext_hdr_types == u8x16_splat (nexthdr));
175 return ((nexthdr ^ IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) |
176 (nexthdr ^ IP_PROTOCOL_IPV6_ROUTE) |
177 (nexthdr ^ IP_PROTOCOL_IPV6_FRAGMENTATION) != 0);
181 static_always_inline u8
182 esp_get_ip6_hdr_len (ip6_header_t * ip6, ip6_ext_header_t ** ext_hdr)
184 /* this code assumes that HbH, route and frag headers will be before
185 others, if that is not the case, they will end up encrypted */
186 u8 len = sizeof (ip6_header_t);
189 /* if next packet doesn't have ext header */
190 if (ext_hdr_is_pre_esp (ip6->protocol) == 0)
196 p = (void *) (ip6 + 1);
197 len += ip6_ext_header_len (p);
199 while (ext_hdr_is_pre_esp (p->next_hdr))
201 len += ip6_ext_header_len (p);
202 p = ip6_ext_next_header (p);
209 static_always_inline void
210 esp_process_chained_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
211 vnet_crypto_op_t * ops, vlib_buffer_t * b[],
212 u16 * nexts, vnet_crypto_op_chunk_t * chunks)
214 u32 n_fail, n_ops = vec_len (ops);
215 vnet_crypto_op_t *op = ops;
220 n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops);
224 ASSERT (op - ops < n_ops);
226 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
228 u32 bi = op->user_data;
229 b[bi]->error = node->errors[ESP_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR];
230 nexts[bi] = ESP_ENCRYPT_NEXT_DROP;
237 static_always_inline void
238 esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
239 vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts)
241 u32 n_fail, n_ops = vec_len (ops);
242 vnet_crypto_op_t *op = ops;
247 n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
251 ASSERT (op - ops < n_ops);
253 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
255 u32 bi = op->user_data;
256 b[bi]->error = node->errors[ESP_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR];
257 nexts[bi] = ESP_ENCRYPT_NEXT_DROP;
268 } __clib_packed esp_gcm_nonce_t;
270 STATIC_ASSERT_SIZEOF (esp_gcm_nonce_t, 12);
273 esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
274 vlib_frame_t * frame, int is_ip6, int is_tun)
276 ipsec_main_t *im = &ipsec_main;
277 ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, vm->thread_index);
278 u32 *from = vlib_frame_vector_args (frame);
279 u32 n_left = frame->n_vectors;
280 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
281 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
282 esp_gcm_nonce_t nonces[VLIB_FRAME_SIZE], *nonce = nonces;
283 u32 thread_index = vm->thread_index;
284 u16 buffer_data_size = vlib_buffer_get_default_data_size (vm);
285 u32 current_sa_index = ~0, current_sa_packets = 0;
286 u32 current_sa_bytes = 0, spi = 0;
287 u8 block_sz = 0, iv_sz = 0, icv_sz = 0;
289 vnet_crypto_op_chunk_t *ch;
291 vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
292 vnet_crypto_op_t **integ_ops = &ptd->integ_ops;
294 vlib_get_buffers (vm, from, b, n_left);
295 vec_reset_length (ptd->crypto_ops);
296 vec_reset_length (ptd->integ_ops);
297 vec_reset_length (ptd->chained_crypto_ops);
298 vec_reset_length (ptd->chained_integ_ops);
299 vec_reset_length (ptd->chunks);
306 u8 *payload, *next_hdr_ptr;
307 u16 payload_len, payload_len_total, n_bufs;
308 u32 hdr_len, config_index;
313 vlib_prefetch_buffer_header (b[2], LOAD);
314 p = vlib_buffer_get_current (b[1]);
315 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
316 p -= CLIB_CACHE_LINE_BYTES;
317 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
322 /* we are on a ipsec tunnel's feature arc */
324 config_index = b[0]->current_config_index;
325 vnet_feature_next (&next0, b[0]);
327 vnet_buffer (b[0])->ipsec.sad_index =
328 sa_index0 = ipsec_tun_protect_get_sa_out
329 (vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
332 sa_index0 = vnet_buffer (b[0])->ipsec.sad_index;
334 if (sa_index0 != current_sa_index)
336 if (current_sa_packets)
337 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
341 current_sa_packets = current_sa_bytes = 0;
343 sa0 = pool_elt_at_index (im->sad, sa_index0);
344 current_sa_index = sa_index0;
345 spi = clib_net_to_host_u32 (sa0->spi);
346 block_sz = sa0->crypto_block_size;
347 icv_sz = sa0->integ_icv_size;
348 iv_sz = sa0->crypto_iv_size;
351 if (PREDICT_FALSE (~0 == sa0->encrypt_thread_index))
353 /* this is the first packet to use this SA, claim the SA
354 * for this thread. this could happen simultaneously on
356 clib_atomic_cmp_and_swap (&sa0->encrypt_thread_index, ~0,
357 ipsec_sa_assign_thread (thread_index));
360 if (PREDICT_TRUE (thread_index != sa0->encrypt_thread_index))
362 next[0] = ESP_ENCRYPT_NEXT_HANDOFF;
365 b[0]->current_config_index = config_index;
371 n_bufs = vlib_buffer_chain_linearize (vm, b[0]);
374 b[0]->error = node->errors[ESP_ENCRYPT_ERROR_NO_BUFFERS];
375 next[0] = ESP_ENCRYPT_NEXT_DROP;
381 crypto_ops = &ptd->chained_crypto_ops;
382 integ_ops = &ptd->chained_integ_ops;
384 /* find last buffer in the chain */
385 while (lb->flags & VLIB_BUFFER_NEXT_PRESENT)
386 lb = vlib_get_buffer (vm, lb->next_buffer);
390 crypto_ops = &ptd->crypto_ops;
391 integ_ops = &ptd->integ_ops;
394 if (PREDICT_FALSE (esp_seq_advance (sa0)))
396 b[0]->error = node->errors[ESP_ENCRYPT_ERROR_SEQ_CYCLED];
397 next[0] = ESP_ENCRYPT_NEXT_DROP;
404 if (ipsec_sa_is_set_IS_TUNNEL (sa0))
406 payload = vlib_buffer_get_current (b[0]);
407 next_hdr_ptr = esp_add_footer_and_icv (lb, block_sz, icv_sz,
410 vlib_buffer_length_in_chain
414 b[0]->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
415 payload_len = b[0]->current_length;
416 payload_len_total = vlib_buffer_length_in_chain (vm, b[0]);
419 hdr_len += sizeof (*esp);
420 esp = (esp_header_t *) (payload - hdr_len);
422 /* optional UDP header */
423 if (ipsec_sa_is_set_UDP_ENCAP (sa0))
425 hdr_len += sizeof (udp_header_t);
426 esp_fill_udp_hdr (sa0, (udp_header_t *) (payload - hdr_len),
427 payload_len_total + hdr_len);
431 if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))
434 u16 len = sizeof (ip6_header_t);
436 ip6 = (ip6_header_t *) (payload - hdr_len);
437 clib_memcpy_fast (ip6, &sa0->ip6_hdr, len);
438 *next_hdr_ptr = (is_ip6 ?
439 IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
440 len = payload_len_total + hdr_len - len;
441 ip6->payload_length = clib_net_to_host_u16 (len);
446 u16 len = sizeof (ip4_header_t);
448 ip4 = (ip4_header_t *) (payload - hdr_len);
449 clib_memcpy_fast (ip4, &sa0->ip4_hdr, len);
450 *next_hdr_ptr = (is_ip6 ?
451 IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
452 len = payload_len_total + hdr_len;
453 esp_update_ip4_hdr (ip4, len, /* is_transport */ 0, 0);
459 next[0] = dpo->dpoi_next_node;
460 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
463 else /* transport mode */
465 u8 *l2_hdr, l2_len, *ip_hdr, ip_len;
466 ip6_ext_header_t *ext_hdr;
467 udp_header_t *udp = 0;
468 u8 *old_ip_hdr = vlib_buffer_get_current (b[0]);
471 esp_get_ip6_hdr_len ((ip6_header_t *) old_ip_hdr, &ext_hdr) :
472 ip4_header_bytes ((ip4_header_t *) old_ip_hdr);
474 vlib_buffer_advance (b[0], ip_len);
475 payload = vlib_buffer_get_current (b[0]);
476 next_hdr_ptr = esp_add_footer_and_icv (lb, block_sz, icv_sz,
479 vlib_buffer_length_in_chain
484 b[0]->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
485 payload_len = b[0]->current_length;
486 payload_len_total = vlib_buffer_length_in_chain (vm, b[0]);
489 hdr_len += sizeof (*esp);
490 esp = (esp_header_t *) (payload - hdr_len);
492 /* optional UDP header */
493 if (ipsec_sa_is_set_UDP_ENCAP (sa0))
495 hdr_len += sizeof (udp_header_t);
496 udp = (udp_header_t *) (payload - hdr_len);
501 ip_hdr = payload - hdr_len;
506 l2_len = vnet_buffer (b[0])->ip.save_rewrite_length;
508 l2_hdr = payload - hdr_len;
510 /* copy l2 and ip header */
511 clib_memcpy_le32 (l2_hdr, old_ip_hdr - l2_len, l2_len);
518 ip6_header_t *ip6 = (ip6_header_t *) (old_ip_hdr);
519 if (PREDICT_TRUE (NULL == ext_hdr))
521 *next_hdr_ptr = ip6->protocol;
522 ip6->protocol = IP_PROTOCOL_IPSEC_ESP;
526 *next_hdr_ptr = ext_hdr->next_hdr;
527 ext_hdr->next_hdr = IP_PROTOCOL_IPSEC_ESP;
529 ip6->payload_length =
530 clib_host_to_net_u16 (payload_len_total + hdr_len - l2_len -
531 sizeof (ip6_header_t));
536 ip4_header_t *ip4 = (ip4_header_t *) (old_ip_hdr);
537 *next_hdr_ptr = ip4->protocol;
538 len = payload_len_total + hdr_len - l2_len;
541 esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 1);
542 esp_fill_udp_hdr (sa0, udp, len - ip_len);
545 esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 0);
548 clib_memcpy_le64 (ip_hdr, old_ip_hdr, ip_len);
551 next[0] = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
555 esp->seq = clib_net_to_host_u32 (sa0->seq);
557 if (sa0->crypto_enc_op_id)
559 vnet_crypto_op_t *op;
560 vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
561 vnet_crypto_op_init (op, sa0->crypto_enc_op_id);
563 op->src = op->dst = payload;
564 op->key_index = sa0->crypto_key_index;
565 op->len = payload_len - icv_sz;
566 op->user_data = b - bufs;
568 if (ipsec_sa_is_set_IS_AEAD (sa0))
571 * construct the AAD in a scratch space in front
574 op->aad = payload - hdr_len - sizeof (esp_aead_t);
576 esp_aad_fill (op, esp, sa0);
578 op->tag = payload + op->len;
581 u64 *iv = (u64 *) (payload - iv_sz);
582 nonce->salt = sa0->salt;
583 nonce->iv = *iv = clib_host_to_net_u64 (sa0->gcm_iv_counter++);
584 op->iv = (u8 *) nonce;
589 op->iv = payload - iv_sz;
590 op->flags = VNET_CRYPTO_OP_FLAG_INIT_IV;
596 vlib_buffer_t *cb = b[0];
597 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
598 op->chunk_index = vec_len (ptd->chunks);
599 op->tag = vlib_buffer_get_tail (lb) - icv_sz;
600 vec_add2 (ptd->chunks, ch, 1);
601 ch->len = payload_len;
602 ch->src = ch->dst = payload;
603 cb = vlib_get_buffer (vm, cb->next_buffer);
608 vec_add2 (ptd->chunks, ch, 1);
611 ch->len = cb->current_length - icv_sz;
613 ch->len = cb->current_length;
614 ch->src = ch->dst = vlib_buffer_get_current (cb);
616 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
619 cb = vlib_get_buffer (vm, cb->next_buffer);
624 if (sa0->integ_op_id)
626 vnet_crypto_op_t *op;
627 vec_add2_aligned (integ_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
628 vnet_crypto_op_init (op, sa0->integ_op_id);
629 op->src = payload - iv_sz - sizeof (esp_header_t);
630 op->digest = payload + payload_len - icv_sz;
631 op->key_index = sa0->integ_key_index;
632 op->digest_len = icv_sz;
633 op->len = payload_len - icv_sz + iv_sz + sizeof (esp_header_t);
634 op->user_data = b - bufs;
639 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
640 vlib_buffer_t *cb = b[0];
641 op->chunk_index = vec_len (ptd->chunks);
642 op->digest = vlib_buffer_get_tail (lb) - icv_sz;
643 vec_add2 (ptd->chunks, ch, 1);
644 ch->len = payload_len + iv_sz + sizeof (esp_header_t);
645 ch->src = payload - iv_sz - sizeof (esp_header_t);
646 cb = vlib_get_buffer (vm, cb->next_buffer);
651 vec_add2 (ptd->chunks, ch, 1);
655 ch->len = cb->current_length - icv_sz;
656 if (ipsec_sa_is_set_USE_ESN (sa0))
658 u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi);
659 clib_memcpy_fast (op->digest, &seq_hi,
661 ch->len += sizeof (seq_hi);
665 ch->len = cb->current_length;
666 ch->src = vlib_buffer_get_current (cb);
668 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
671 cb = vlib_get_buffer (vm, cb->next_buffer);
674 else if (ipsec_sa_is_set_USE_ESN (sa0))
676 u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi);
677 clib_memcpy_fast (op->digest, &seq_hi, sizeof (seq_hi));
678 op->len += sizeof (seq_hi);
682 vlib_buffer_advance (b[0], 0LL - hdr_len);
684 current_sa_packets += 1;
685 current_sa_bytes += payload_len_total;
688 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
690 esp_encrypt_trace_t *tr = vlib_add_trace (vm, node, b[0],
692 tr->sa_index = sa_index0;
695 tr->sa_seq_hi = sa0->seq_hi;
696 tr->udp_encap = ipsec_sa_is_set_UDP_ENCAP (sa0);
697 tr->crypto_alg = sa0->crypto_alg;
698 tr->integ_alg = sa0->integ_alg;
706 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
707 current_sa_index, current_sa_packets,
710 esp_process_ops (vm, node, ptd->crypto_ops, bufs, nexts);
711 esp_process_chained_ops (vm, node, ptd->chained_crypto_ops, bufs, nexts,
714 esp_process_ops (vm, node, ptd->integ_ops, bufs, nexts);
715 esp_process_chained_ops (vm, node, ptd->chained_integ_ops, bufs, nexts,
718 vlib_node_increment_counter (vm, node->node_index,
719 ESP_ENCRYPT_ERROR_RX_PKTS, frame->n_vectors);
721 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
722 return frame->n_vectors;
725 VLIB_NODE_FN (esp4_encrypt_node) (vlib_main_t * vm,
726 vlib_node_runtime_t * node,
727 vlib_frame_t * from_frame)
729 return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ , 0);
733 VLIB_REGISTER_NODE (esp4_encrypt_node) = {
734 .name = "esp4-encrypt",
735 .vector_size = sizeof (u32),
736 .format_trace = format_esp_encrypt_trace,
737 .type = VLIB_NODE_TYPE_INTERNAL,
739 .n_errors = ARRAY_LEN(esp_encrypt_error_strings),
740 .error_strings = esp_encrypt_error_strings,
742 .n_next_nodes = ESP_ENCRYPT_N_NEXT,
744 [ESP_ENCRYPT_NEXT_DROP] = "ip4-drop",
745 [ESP_ENCRYPT_NEXT_HANDOFF] = "esp4-encrypt-handoff",
746 [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output",
751 VLIB_NODE_FN (esp6_encrypt_node) (vlib_main_t * vm,
752 vlib_node_runtime_t * node,
753 vlib_frame_t * from_frame)
755 return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ , 0);
759 VLIB_REGISTER_NODE (esp6_encrypt_node) = {
760 .name = "esp6-encrypt",
761 .vector_size = sizeof (u32),
762 .format_trace = format_esp_encrypt_trace,
763 .type = VLIB_NODE_TYPE_INTERNAL,
765 .n_errors = ARRAY_LEN(esp_encrypt_error_strings),
766 .error_strings = esp_encrypt_error_strings,
768 .n_next_nodes = ESP_ENCRYPT_N_NEXT,
770 [ESP_ENCRYPT_NEXT_DROP] = "ip6-drop",
771 [ESP_ENCRYPT_NEXT_HANDOFF] = "esp6-encrypt-handoff",
772 [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output",
777 VLIB_NODE_FN (esp4_encrypt_tun_node) (vlib_main_t * vm,
778 vlib_node_runtime_t * node,
779 vlib_frame_t * from_frame)
781 return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ , 1);
785 VLIB_REGISTER_NODE (esp4_encrypt_tun_node) = {
786 .name = "esp4-encrypt-tun",
787 .vector_size = sizeof (u32),
788 .format_trace = format_esp_encrypt_trace,
789 .type = VLIB_NODE_TYPE_INTERNAL,
791 .n_errors = ARRAY_LEN(esp_encrypt_error_strings),
792 .error_strings = esp_encrypt_error_strings,
794 .n_next_nodes = ESP_ENCRYPT_N_NEXT,
796 [ESP_ENCRYPT_NEXT_DROP] = "ip4-drop",
797 [ESP_ENCRYPT_NEXT_HANDOFF] = "esp4-encrypt-tun-handoff",
798 [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "error-drop",
802 VNET_FEATURE_INIT (esp4_encrypt_tun_feat_node, static) =
804 .arc_name = "ip4-output",
805 .node_name = "esp4-encrypt-tun",
806 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
809 VNET_FEATURE_INIT (esp6o4_encrypt_tun_feat_node, static) =
811 .arc_name = "ip6-output",
812 .node_name = "esp4-encrypt-tun",
813 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
816 VNET_FEATURE_INIT (esp4_ethernet_encrypt_tun_feat_node, static) =
818 .arc_name = "ethernet-output",
819 .node_name = "esp4-encrypt-tun",
820 .runs_before = VNET_FEATURES ("adj-midchain-tx", "adj-midchain-tx-no-count"),
824 VLIB_NODE_FN (esp6_encrypt_tun_node) (vlib_main_t * vm,
825 vlib_node_runtime_t * node,
826 vlib_frame_t * from_frame)
828 return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ , 1);
832 VLIB_REGISTER_NODE (esp6_encrypt_tun_node) = {
833 .name = "esp6-encrypt-tun",
834 .vector_size = sizeof (u32),
835 .format_trace = format_esp_encrypt_trace,
836 .type = VLIB_NODE_TYPE_INTERNAL,
838 .n_errors = ARRAY_LEN(esp_encrypt_error_strings),
839 .error_strings = esp_encrypt_error_strings,
841 .n_next_nodes = ESP_ENCRYPT_N_NEXT,
843 [ESP_ENCRYPT_NEXT_DROP] = "ip6-drop",
844 [ESP_ENCRYPT_NEXT_HANDOFF] = "esp6-encrypt-tun-handoff",
845 [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "error-drop",
849 VNET_FEATURE_INIT (esp6_encrypt_tun_feat_node, static) =
851 .arc_name = "ip6-output",
852 .node_name = "esp6-encrypt-tun",
853 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
856 VNET_FEATURE_INIT (esp4o6_encrypt_tun_feat_node, static) =
858 .arc_name = "ip4-output",
859 .node_name = "esp6-encrypt-tun",
860 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
868 } esp_no_crypto_trace_t;
871 format_esp_no_crypto_trace (u8 * s, va_list * args)
873 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
874 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
875 esp_no_crypto_trace_t *t = va_arg (*args, esp_no_crypto_trace_t *);
877 s = format (s, "esp-no-crypto: sa-index %u", t->sa_index);
884 ESP_NO_CRYPTO_NEXT_DROP,
885 ESP_NO_CRYPTO_N_NEXT,
890 ESP_NO_CRYPTO_ERROR_RX_PKTS,
893 static char *esp_no_crypto_error_strings[] = {
894 "Outbound ESP packets received",
898 esp_no_crypto_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
899 vlib_frame_t * frame)
901 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
902 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
903 u32 *from = vlib_frame_vector_args (frame);
904 u32 n_left = frame->n_vectors;
906 vlib_get_buffers (vm, from, b, n_left);
913 /* packets are always going to be dropped, but get the sa_index */
914 sa_index0 = *(u32 *) vnet_feature_next_with_data (&next0, b[0],
917 next[0] = ESP_NO_CRYPTO_NEXT_DROP;
919 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
921 esp_no_crypto_trace_t *tr = vlib_add_trace (vm, node, b[0],
923 tr->sa_index = sa_index0;
931 vlib_node_increment_counter (vm, node->node_index,
932 ESP_NO_CRYPTO_ERROR_RX_PKTS, frame->n_vectors);
934 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
936 return frame->n_vectors;
939 VLIB_NODE_FN (esp4_no_crypto_tun_node) (vlib_main_t * vm,
940 vlib_node_runtime_t * node,
941 vlib_frame_t * from_frame)
943 return esp_no_crypto_inline (vm, node, from_frame);
947 VLIB_REGISTER_NODE (esp4_no_crypto_tun_node) =
949 .name = "esp4-no-crypto",
950 .vector_size = sizeof (u32),
951 .format_trace = format_esp_no_crypto_trace,
952 .n_errors = ARRAY_LEN(esp_no_crypto_error_strings),
953 .error_strings = esp_no_crypto_error_strings,
954 .n_next_nodes = ESP_NO_CRYPTO_N_NEXT,
956 [ESP_NO_CRYPTO_NEXT_DROP] = "ip4-drop",
960 VNET_FEATURE_INIT (esp4_no_crypto_tun_feat_node, static) =
962 .arc_name = "ip4-output",
963 .node_name = "esp4-no-crypto",
964 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
967 VLIB_NODE_FN (esp6_no_crypto_tun_node) (vlib_main_t * vm,
968 vlib_node_runtime_t * node,
969 vlib_frame_t * from_frame)
971 return esp_no_crypto_inline (vm, node, from_frame);
975 VLIB_REGISTER_NODE (esp6_no_crypto_tun_node) =
977 .name = "esp6-no-crypto",
978 .vector_size = sizeof (u32),
979 .format_trace = format_esp_no_crypto_trace,
980 .n_errors = ARRAY_LEN(esp_no_crypto_error_strings),
981 .error_strings = esp_no_crypto_error_strings,
982 .n_next_nodes = ESP_NO_CRYPTO_N_NEXT,
984 [ESP_NO_CRYPTO_NEXT_DROP] = "ip6-drop",
988 VNET_FEATURE_INIT (esp6_no_crypto_tun_feat_node, static) =
990 .arc_name = "ip6-output",
991 .node_name = "esp6-no-crypto",
992 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
997 * fd.io coding-style-patch-verification: ON
1000 * eval: (c-set-style "gnu")