2 * Copyright (c) 2020 Doc.ai and/or its affiliates.
3 * Copyright (c) 2020 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <vlib/vlib.h>
18 #include <vnet/vnet.h>
19 #include <vppinfra/error.h>
20 #include <wireguard/wireguard.h>
22 #include <wireguard/wireguard_send.h>
23 #include <wireguard/wireguard_if.h>
25 #define foreach_wg_input_error \
26 _ (NONE, "No error") \
27 _ (HANDSHAKE_MAC, "Invalid MAC handshake") \
28 _ (HANDSHAKE_RATELIMITED, "Handshake ratelimited") \
29 _ (PEER, "Peer error") \
30 _ (INTERFACE, "Interface error") \
31 _ (DECRYPTION, "Failed during decryption") \
32 _ (KEEPALIVE_SEND, "Failed while sending Keepalive") \
33 _ (HANDSHAKE_SEND, "Failed while sending Handshake") \
34 _ (HANDSHAKE_RECEIVE, "Failed while receiving Handshake") \
35 _ (COOKIE_DECRYPTION, "Failed during Cookie decryption") \
36 _ (COOKIE_SEND, "Failed during sending Cookie") \
37 _ (TOO_BIG, "Packet too big") \
38 _ (UNDEFINED, "Undefined error") \
39 _ (CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)")
43 #define _(sym,str) WG_INPUT_ERROR_##sym,
44 foreach_wg_input_error
49 static char *wg_input_error_strings[] = {
50 #define _(sym,string) string,
51 foreach_wg_input_error
67 } wg_input_post_trace_t;
70 format_wg_message_type (u8 * s, va_list * args)
72 message_type_t type = va_arg (*args, message_type_t);
76 #define _(v,a) case MESSAGE_##v: return (format (s, "%s", a));
77 foreach_wg_message_type
80 return (format (s, "unknown"));
83 /* packet trace format function */
85 format_wg_input_trace (u8 * s, va_list * args)
87 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
88 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
90 wg_input_trace_t *t = va_arg (*args, wg_input_trace_t *);
92 s = format (s, "Wireguard input: \n");
93 s = format (s, " Type: %U\n", format_wg_message_type, t->type);
94 s = format (s, " Peer: %d\n", t->peer);
95 s = format (s, " Length: %d\n", t->current_length);
96 s = format (s, " Keepalive: %s", t->is_keepalive ? "true" : "false");
101 /* post-node packet trace format function */
103 format_wg_input_post_trace (u8 *s, va_list *args)
105 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
106 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
108 wg_input_post_trace_t *t = va_arg (*args, wg_input_post_trace_t *);
110 s = format (s, "WG input post: \n");
111 s = format (s, " peer: %u\n", t->peer);
112 s = format (s, " next: %u\n", t->next);
119 WG_INPUT_NEXT_HANDOFF_HANDSHAKE,
120 WG_INPUT_NEXT_HANDOFF_DATA,
121 WG_INPUT_NEXT_IP4_INPUT,
122 WG_INPUT_NEXT_IP6_INPUT,
129 is_ip4_header (u8 *data)
131 return (data[0] >> 4) == 0x4;
134 static wg_input_error_t
135 wg_handshake_process (vlib_main_t *vm, wg_main_t *wmp, vlib_buffer_t *b,
136 u32 node_idx, u8 is_ip4)
138 ASSERT (vm->thread_index == 0);
140 enum cookie_mac_state mac_state;
141 bool packet_needs_cookie;
145 wg_peer_t *peer = NULL;
147 void *current_b_data = vlib_buffer_get_current (b);
149 ip46_address_t src_ip;
153 current_b_data - sizeof (udp_header_t) - sizeof (ip4_header_t);
154 ip46_address_set_ip4 (&src_ip, &iph4->src_address);
159 current_b_data - sizeof (udp_header_t) - sizeof (ip6_header_t);
160 ip46_address_set_ip6 (&src_ip, &iph6->src_address);
163 udp_header_t *uhd = current_b_data - sizeof (udp_header_t);
164 u16 udp_src_port = clib_host_to_net_u16 (uhd->src_port);
165 u16 udp_dst_port = clib_host_to_net_u16 (uhd->dst_port);
167 message_header_t *header = current_b_data;
169 if (PREDICT_FALSE (header->type == MESSAGE_HANDSHAKE_COOKIE))
171 message_handshake_cookie_t *packet =
172 (message_handshake_cookie_t *) current_b_data;
174 wg_index_table_lookup (&wmp->index_table, packet->receiver_index);
176 peer = wg_peer_get (*entry);
178 return WG_INPUT_ERROR_PEER;
180 if (!cookie_maker_consume_payload (
181 vm, &peer->cookie_maker, packet->nonce, packet->encrypted_cookie))
182 return WG_INPUT_ERROR_COOKIE_DECRYPTION;
184 return WG_INPUT_ERROR_NONE;
187 u32 len = (header->type == MESSAGE_HANDSHAKE_INITIATION ?
188 sizeof (message_handshake_initiation_t) :
189 sizeof (message_handshake_response_t));
191 message_macs_t *macs = (message_macs_t *)
192 ((u8 *) current_b_data + len - sizeof (*macs));
195 wg_ifs = wg_if_indexes_get_by_port (udp_dst_port);
197 return WG_INPUT_ERROR_INTERFACE;
199 vec_foreach (ii, wg_ifs)
201 wg_if = wg_if_get (*ii);
205 under_load = wg_if_is_under_load (vm, wg_if);
206 mac_state = cookie_checker_validate_macs (
207 vm, &wg_if->cookie_checker, macs, current_b_data, len, under_load,
208 &src_ip, udp_src_port);
209 if (mac_state == INVALID_MAC)
211 wg_if_dec_handshake_num (wg_if);
219 return WG_INPUT_ERROR_HANDSHAKE_MAC;
221 if ((under_load && mac_state == VALID_MAC_WITH_COOKIE)
222 || (!under_load && mac_state == VALID_MAC_BUT_NO_COOKIE))
223 packet_needs_cookie = false;
224 else if (under_load && mac_state == VALID_MAC_BUT_NO_COOKIE)
225 packet_needs_cookie = true;
226 else if (mac_state == VALID_MAC_WITH_COOKIE_BUT_RATELIMITED)
227 return WG_INPUT_ERROR_HANDSHAKE_RATELIMITED;
229 return WG_INPUT_ERROR_HANDSHAKE_MAC;
231 switch (header->type)
233 case MESSAGE_HANDSHAKE_INITIATION:
235 message_handshake_initiation_t *message = current_b_data;
237 if (packet_needs_cookie)
240 if (!wg_send_handshake_cookie (vm, message->sender_index,
241 &wg_if->cookie_checker, macs,
242 &ip_addr_46 (&wg_if->src_ip),
243 wg_if->port, &src_ip, udp_src_port))
244 return WG_INPUT_ERROR_COOKIE_SEND;
246 return WG_INPUT_ERROR_NONE;
250 if (noise_consume_initiation
251 (vm, noise_local_get (wg_if->local_idx), &rp,
252 message->sender_index, message->unencrypted_ephemeral,
253 message->encrypted_static, message->encrypted_timestamp))
255 peer = wg_peer_get (rp->r_peer_idx);
259 return WG_INPUT_ERROR_PEER;
262 wg_peer_update_endpoint (rp->r_peer_idx, &src_ip, udp_src_port);
264 if (PREDICT_FALSE (!wg_send_handshake_response (vm, peer)))
266 vlib_node_increment_counter (vm, node_idx,
267 WG_INPUT_ERROR_HANDSHAKE_SEND, 1);
271 wg_peer_update_flags (rp->r_peer_idx, WG_PEER_ESTABLISHED, true);
275 case MESSAGE_HANDSHAKE_RESPONSE:
277 message_handshake_response_t *resp = current_b_data;
279 if (packet_needs_cookie)
281 if (!wg_send_handshake_cookie (vm, resp->sender_index,
282 &wg_if->cookie_checker, macs,
283 &ip_addr_46 (&wg_if->src_ip),
284 wg_if->port, &src_ip, udp_src_port))
285 return WG_INPUT_ERROR_COOKIE_SEND;
287 return WG_INPUT_ERROR_NONE;
290 index_t peeri = INDEX_INVALID;
292 wg_index_table_lookup (&wmp->index_table, resp->receiver_index);
294 if (PREDICT_TRUE (entry != NULL))
297 peer = wg_peer_get (peeri);
298 if (wg_peer_is_dead (peer))
299 return WG_INPUT_ERROR_PEER;
302 return WG_INPUT_ERROR_PEER;
304 if (!noise_consume_response
305 (vm, &peer->remote, resp->sender_index,
306 resp->receiver_index, resp->unencrypted_ephemeral,
307 resp->encrypted_nothing))
309 return WG_INPUT_ERROR_PEER;
312 wg_peer_update_endpoint (peeri, &src_ip, udp_src_port);
314 if (noise_remote_begin_session (vm, &peer->remote))
317 wg_timers_session_derived (peer);
318 wg_timers_handshake_complete (peer);
319 if (PREDICT_FALSE (!wg_send_keepalive (vm, peer)))
321 vlib_node_increment_counter (vm, node_idx,
322 WG_INPUT_ERROR_KEEPALIVE_SEND, 1);
326 wg_peer_update_flags (peeri, WG_PEER_ESTABLISHED, true);
332 return WG_INPUT_ERROR_HANDSHAKE_RECEIVE;
335 wg_timers_any_authenticated_packet_received (peer);
336 wg_timers_any_authenticated_packet_traversal (peer);
337 return WG_INPUT_ERROR_NONE;
340 static_always_inline int
341 wg_input_post_process (vlib_main_t *vm, vlib_buffer_t *b, u16 *next,
342 wg_peer_t *peer, message_data_t *data,
345 next[0] = WG_INPUT_NEXT_PUNT;
347 noise_keypair_t *kp =
348 wg_get_active_keypair (&peer->remote, data->receiver_index);
350 if (!noise_counter_recv (&kp->kp_ctr, data->counter))
355 u16 encr_len = b->current_length - sizeof (message_data_t);
356 u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
358 vlib_buffer_advance (b, sizeof (message_data_t));
359 b->current_length = decr_len;
360 vnet_buffer_offload_flags_clear (b, VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
362 /* Keepalive packet has zero length */
365 *is_keepalive = true;
369 wg_timers_data_received (peer);
371 ip46_address_t src_ip;
372 u8 is_ip4_inner = is_ip4_header (vlib_buffer_get_current (b));
375 ip46_address_set_ip4 (
376 &src_ip, &((ip4_header_t *) vlib_buffer_get_current (b))->src_address);
380 ip46_address_set_ip6 (
381 &src_ip, &((ip6_header_t *) vlib_buffer_get_current (b))->src_address);
384 const fib_prefix_t *allowed_ip;
385 bool allowed = false;
388 * we could make this into an ACL, but the expectation
389 * is that there aren't many allowed IPs and thus a linear
390 * walk is faster than an ACL
392 vec_foreach (allowed_ip, peer->allowed_ips)
394 if (fib_prefix_is_cover_addr_46 (allowed_ip, &src_ip))
402 vnet_buffer (b)->sw_if_index[VLIB_RX] = peer->wg_sw_if_index;
404 is_ip4_inner ? WG_INPUT_NEXT_IP4_INPUT : WG_INPUT_NEXT_IP6_INPUT;
410 static_always_inline void
411 wg_input_process_ops (vlib_main_t *vm, vlib_node_runtime_t *node,
412 vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts,
415 u32 n_fail, n_ops = vec_len (ops);
416 vnet_crypto_op_t *op = ops;
421 n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
425 ASSERT (op - ops < n_ops);
427 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
429 u32 bi = op->user_data;
430 b[bi]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
431 nexts[bi] = drop_next;
439 wg_prepare_sync_dec_op (vlib_main_t *vm, vnet_crypto_op_t **crypto_ops,
440 u8 *src, u32 src_len, u8 *dst, u8 *aad, u32 aad_len,
441 vnet_crypto_key_index_t key_index, u32 bi, u8 *iv)
443 vnet_crypto_op_t _op, *op = &_op;
446 vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
447 vnet_crypto_op_init (op, VNET_CRYPTO_OP_CHACHA20_POLY1305_DEC);
449 op->tag_len = NOISE_AUTHTAG_LEN;
450 op->tag = src + src_len;
451 op->src = !src ? src_ : src;
454 op->key_index = key_index;
456 op->aad_len = aad_len;
459 op->flags |= VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
462 static_always_inline void
463 wg_input_add_to_frame (vlib_main_t *vm, vnet_crypto_async_frame_t *f,
464 u32 key_index, u32 crypto_len, i16 crypto_start_offset,
465 u32 buffer_index, u16 next_node, u8 *iv, u8 *tag,
468 vnet_crypto_async_frame_elt_t *fe;
471 ASSERT (f->n_elts < VNET_CRYPTO_FRAME_SIZE);
474 fe = &f->elts[index];
476 fe->key_index = key_index;
477 fe->crypto_total_length = crypto_len;
478 fe->crypto_start_offset = crypto_start_offset;
482 f->buffer_indices[index] = buffer_index;
483 f->next_node_index[index] = next_node;
486 static_always_inline enum noise_state_crypt
487 wg_input_process (vlib_main_t *vm, wg_per_thread_data_t *ptd,
488 vnet_crypto_op_t **crypto_ops,
489 vnet_crypto_async_frame_t **async_frame, vlib_buffer_t *b,
490 u32 buf_idx, noise_remote_t *r, uint32_t r_idx,
491 uint64_t nonce, uint8_t *src, size_t srclen, uint8_t *dst,
492 u32 from_idx, u8 *iv, f64 time, u8 is_async,
496 enum noise_state_crypt ret = SC_FAILED;
498 if ((kp = wg_get_active_keypair (r, r_idx)) == NULL)
503 /* We confirm that our values are within our tolerances. These values
504 * are the same as the encrypt routine.
506 * kp_ctr isn't locked here, we're happy to accept a racy read. */
507 if (wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME,
509 kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES)
512 /* Decrypt, then validate the counter. We don't want to validate the
513 * counter before decrypting as we do not know the message is authentic
514 * prior to decryption. */
516 clib_memset (iv, 0, 4);
517 clib_memcpy (iv + 4, &nonce, sizeof (nonce));
521 if (NULL == *async_frame ||
522 vnet_crypto_async_frame_is_full (*async_frame))
524 *async_frame = vnet_crypto_async_get_frame (
525 vm, VNET_CRYPTO_OP_CHACHA20_POLY1305_TAG16_AAD0_DEC);
526 /* Save the frame to the list we'll submit at the end */
527 vec_add1 (ptd->async_frames, *async_frame);
530 wg_input_add_to_frame (vm, *async_frame, kp->kp_recv_index, srclen,
531 src - b->data, buf_idx, async_next_node, iv,
532 src + srclen, VNET_CRYPTO_OP_FLAG_HMAC_CHECK);
536 wg_prepare_sync_dec_op (vm, crypto_ops, src, srclen, dst, NULL, 0,
537 kp->kp_recv_index, from_idx, iv);
540 /* If we've received the handshake confirming data packet then move the
541 * next keypair into current. If we do slide the next keypair in, then
542 * we skip the REKEY_AFTER_TIME_RECV check. This is safe to do as a
543 * data packet can't confirm a session that we are an INITIATOR of. */
546 clib_rwlock_writer_lock (&r->r_keypair_lock);
547 if (kp == r->r_next && kp->kp_local_index == r_idx)
549 noise_remote_keypair_free (vm, r, &r->r_previous);
550 r->r_previous = r->r_current;
551 r->r_current = r->r_next;
555 clib_rwlock_writer_unlock (&r->r_keypair_lock);
558 clib_rwlock_writer_unlock (&r->r_keypair_lock);
561 /* Similar to when we encrypt, we want to notify the caller when we
562 * are approaching our tolerances. We notify if:
563 * - we're the initiator and the current keypair is older than
564 * REKEY_AFTER_TIME_RECV seconds. */
565 ret = SC_KEEP_KEY_FRESH;
567 if (kp != NULL && kp->kp_valid && kp->kp_is_initiator &&
568 wg_birthdate_has_expired_opt (kp->kp_birthdate, REKEY_AFTER_TIME_RECV,
577 static_always_inline void
578 wg_find_outer_addr_port (vlib_buffer_t *b, ip46_address_t *addr, u16 *port,
583 ip4_udp_header_t *ip4_udp_hdr =
584 vlib_buffer_get_current (b) - sizeof (ip4_udp_header_t);
585 ip46_address_set_ip4 (addr, &ip4_udp_hdr->ip4.src_address);
586 *port = clib_net_to_host_u16 (ip4_udp_hdr->udp.src_port);
590 ip6_udp_header_t *ip6_udp_hdr =
591 vlib_buffer_get_current (b) - sizeof (ip6_udp_header_t);
592 ip46_address_set_ip6 (addr, &ip6_udp_hdr->ip6.src_address);
593 *port = clib_net_to_host_u16 (ip6_udp_hdr->udp.src_port);
598 wg_input_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
599 vlib_frame_t *frame, u8 is_ip4, u16 async_next_node)
601 vnet_main_t *vnm = vnet_get_main ();
602 vnet_interface_main_t *im = &vnm->interface_main;
603 wg_main_t *wmp = &wg_main;
604 wg_per_thread_data_t *ptd =
605 vec_elt_at_index (wmp->per_thread_data, vm->thread_index);
606 u32 *from = vlib_frame_vector_args (frame);
607 u32 n_left_from = frame->n_vectors;
609 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
610 u32 thread_index = vm->thread_index;
611 vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
612 const u16 drop_next = WG_INPUT_NEXT_PUNT;
613 message_type_t header_type;
614 vlib_buffer_t *data_bufs[VLIB_FRAME_SIZE];
615 u32 data_bi[VLIB_FRAME_SIZE]; /* buffer index for data */
616 u32 other_bi[VLIB_FRAME_SIZE]; /* buffer index for drop or handoff */
617 u16 other_nexts[VLIB_FRAME_SIZE], *other_next = other_nexts, n_other = 0;
618 u16 data_nexts[VLIB_FRAME_SIZE], *data_next = data_nexts, n_data = 0;
620 const u8 is_async = wg_op_mode_is_set_ASYNC ();
621 vnet_crypto_async_frame_t *async_frame = NULL;
623 vlib_get_buffers (vm, from, bufs, n_left_from);
624 vec_reset_length (ptd->crypto_ops);
625 vec_reset_length (ptd->async_frames);
627 f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
629 wg_peer_t *peer = NULL;
630 u32 *last_peer_time_idx = NULL;
631 u32 last_rec_idx = ~0;
633 bool is_keepalive = false;
634 u32 *peer_idx = NULL;
636 while (n_left_from > 0)
641 vlib_prefetch_buffer_header (b[2], LOAD);
642 p = vlib_buffer_get_current (b[1]);
643 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
644 CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
648 other_next[n_other] = WG_INPUT_NEXT_PUNT;
649 data_nexts[n_data] = WG_INPUT_N_NEXT;
652 ((message_header_t *) vlib_buffer_get_current (b[0]))->type;
654 if (PREDICT_TRUE (header_type == MESSAGE_DATA))
656 message_data_t *data = vlib_buffer_get_current (b[0]);
657 u8 *iv_data = b[0]->pre_data;
658 u32 buf_idx = from[b - bufs];
659 peer_idx = wg_index_table_lookup (&wmp->index_table,
660 data->receiver_index);
662 if (data->receiver_index != last_rec_idx)
664 peer_idx = wg_index_table_lookup (&wmp->index_table,
665 data->receiver_index);
666 if (PREDICT_TRUE (peer_idx != NULL))
668 peer = wg_peer_get (*peer_idx);
670 last_rec_idx = data->receiver_index;
673 if (PREDICT_FALSE (!peer_idx))
675 other_next[n_other] = WG_INPUT_NEXT_ERROR;
676 b[0]->error = node->errors[WG_INPUT_ERROR_PEER];
677 other_bi[n_other] = buf_idx;
682 if (PREDICT_FALSE (~0 == peer->input_thread_index))
684 /* this is the first packet to use this peer, claim the peer
687 clib_atomic_cmp_and_swap (&peer->input_thread_index, ~0,
688 wg_peer_assign_thread (thread_index));
691 if (PREDICT_TRUE (thread_index != peer->input_thread_index))
693 other_next[n_other] = WG_INPUT_NEXT_HANDOFF_DATA;
694 other_bi[n_other] = buf_idx;
699 u16 encr_len = b[0]->current_length - sizeof (message_data_t);
700 u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
701 if (PREDICT_FALSE (decr_len >= WG_DEFAULT_DATA_SIZE))
703 b[0]->error = node->errors[WG_INPUT_ERROR_TOO_BIG];
704 other_bi[n_other] = buf_idx;
709 enum noise_state_crypt state_cr = wg_input_process (
710 vm, ptd, crypto_ops, &async_frame, b[0], buf_idx, &peer->remote,
711 data->receiver_index, data->counter, data->encrypted_data,
712 decr_len, data->encrypted_data, n_data, iv_data, time, is_async,
715 if (PREDICT_FALSE (state_cr == SC_FAILED))
717 wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, false);
718 other_next[n_other] = WG_INPUT_NEXT_ERROR;
719 b[0]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
720 other_bi[n_other] = buf_idx;
726 data_bufs[n_data] = b[0];
727 data_bi[n_data] = buf_idx;
735 if (PREDICT_FALSE (state_cr == SC_CONN_RESET))
737 wg_timers_handshake_complete (peer);
740 else if (PREDICT_FALSE (state_cr == SC_KEEP_KEY_FRESH))
742 wg_send_handshake_from_mt (*peer_idx, false);
745 else if (PREDICT_TRUE (state_cr == SC_OK))
750 /* Handshake packets should be processed in main thread */
751 if (thread_index != 0)
753 other_next[n_other] = WG_INPUT_NEXT_HANDOFF_HANDSHAKE;
754 other_bi[n_other] = from[b - bufs];
759 wg_input_error_t ret =
760 wg_handshake_process (vm, wmp, b[0], node->node_index, is_ip4);
761 if (ret != WG_INPUT_ERROR_NONE)
763 other_next[n_other] = WG_INPUT_NEXT_ERROR;
764 b[0]->error = node->errors[ret];
765 other_bi[n_other] = from[b - bufs];
770 other_bi[n_other] = from[b - bufs];
776 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
777 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
779 wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
780 t->type = header_type;
781 t->current_length = b[0]->current_length;
782 t->is_keepalive = is_keepalive;
783 t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
791 /* decrypt packets */
792 wg_input_process_ops (vm, node, ptd->crypto_ops, data_bufs, data_nexts,
795 /* process after decryption */
797 n_left_from = n_data;
799 last_peer_time_idx = NULL;
801 while (n_left_from > 0)
803 bool is_keepalive = false;
804 u32 *peer_idx = NULL;
806 if (PREDICT_FALSE (data_next[0] == WG_INPUT_NEXT_PUNT))
813 vlib_prefetch_buffer_header (b[2], LOAD);
814 p = vlib_buffer_get_current (b[1]);
815 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
816 CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
820 message_data_t *data = vlib_buffer_get_current (b[0]);
821 ip46_address_t out_src_ip;
822 u16 out_udp_src_port;
824 wg_find_outer_addr_port (b[0], &out_src_ip, &out_udp_src_port, is_ip4);
826 if (data->receiver_index != last_rec_idx)
829 wg_index_table_lookup (&wmp->index_table, data->receiver_index);
830 peer = wg_peer_get (*peer_idx);
831 last_rec_idx = data->receiver_index;
834 if (PREDICT_FALSE (wg_input_post_process (vm, b[0], data_next, peer,
835 data, &is_keepalive) < 0))
838 if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
840 wg_peer_update_endpoint_from_mt (*peer_idx, &out_src_ip,
842 wg_timers_any_authenticated_packet_received_opt (peer, time);
843 wg_timers_any_authenticated_packet_traversal (peer);
844 last_peer_time_idx = peer_idx;
847 vlib_increment_combined_counter (im->combined_sw_if_counters +
848 VNET_INTERFACE_COUNTER_RX,
849 vm->thread_index, peer->wg_sw_if_index,
850 1 /* packets */, b[0]->current_length);
853 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
854 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
856 wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
857 t->type = header_type;
858 t->current_length = b[0]->current_length;
859 t->is_keepalive = is_keepalive;
860 t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
870 /* submit all of the open frames */
871 vnet_crypto_async_frame_t **async_frame;
872 vec_foreach (async_frame, ptd->async_frames)
875 vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0))
877 u32 n_drop = (*async_frame)->n_elts;
878 u32 *bi = (*async_frame)->buffer_indices;
882 other_bi[index] = bi[0];
883 vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
884 other_nexts[index] = drop_next;
885 b->error = node->errors[WG_INPUT_ERROR_CRYPTO_ENGINE_ERROR];
889 n_other += (*async_frame)->n_elts;
891 vnet_crypto_async_reset_frame (*async_frame);
892 vnet_crypto_async_free_frame (vm, *async_frame);
897 /* enqueue other bufs */
899 vlib_buffer_enqueue_to_next (vm, node, other_bi, other_next, n_other);
901 /* enqueue data bufs */
903 vlib_buffer_enqueue_to_next (vm, node, data_bi, data_nexts, n_data);
905 return frame->n_vectors;
909 wg_input_post (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame,
912 vnet_main_t *vnm = vnet_get_main ();
913 vnet_interface_main_t *im = &vnm->interface_main;
914 wg_main_t *wmp = &wg_main;
915 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
916 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
917 u32 *from = vlib_frame_vector_args (frame);
918 u32 n_left = frame->n_vectors;
919 wg_peer_t *peer = NULL;
920 u32 *peer_idx = NULL;
921 u32 *last_peer_time_idx = NULL;
922 u32 last_rec_idx = ~0;
923 f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
925 vlib_get_buffers (vm, from, b, n_left);
929 vlib_prefetch_buffer_header (b[0], LOAD);
930 vlib_prefetch_buffer_header (b[1], LOAD);
938 vlib_prefetch_buffer_header (b[2], LOAD);
939 p = vlib_buffer_get_current (b[1]);
940 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
943 bool is_keepalive = false;
944 message_data_t *data = vlib_buffer_get_current (b[0]);
945 ip46_address_t out_src_ip;
946 u16 out_udp_src_port;
948 wg_find_outer_addr_port (b[0], &out_src_ip, &out_udp_src_port, is_ip4);
950 if (data->receiver_index != last_rec_idx)
953 wg_index_table_lookup (&wmp->index_table, data->receiver_index);
955 peer = wg_peer_get (*peer_idx);
956 last_rec_idx = data->receiver_index;
959 if (PREDICT_TRUE (peer != NULL))
961 if (PREDICT_FALSE (wg_input_post_process (vm, b[0], next, peer, data,
967 next[0] = WG_INPUT_NEXT_PUNT;
971 if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
973 wg_peer_update_endpoint_from_mt (*peer_idx, &out_src_ip,
975 wg_timers_any_authenticated_packet_received_opt (peer, time);
976 wg_timers_any_authenticated_packet_traversal (peer);
977 last_peer_time_idx = peer_idx;
980 vlib_increment_combined_counter (im->combined_sw_if_counters +
981 VNET_INTERFACE_COUNTER_RX,
982 vm->thread_index, peer->wg_sw_if_index,
983 1 /* packets */, b[0]->current_length);
986 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
987 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
989 wg_input_post_trace_t *t =
990 vlib_add_trace (vm, node, b[0], sizeof (*t));
992 t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
1000 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1001 return frame->n_vectors;
1004 VLIB_NODE_FN (wg4_input_node)
1005 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1007 return wg_input_inline (vm, node, frame, /* is_ip4 */ 1,
1008 wg_decrypt_async_next.wg4_post_next);
1011 VLIB_NODE_FN (wg6_input_node)
1012 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1014 return wg_input_inline (vm, node, frame, /* is_ip4 */ 0,
1015 wg_decrypt_async_next.wg6_post_next);
1018 VLIB_NODE_FN (wg4_input_post_node)
1019 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
1021 return wg_input_post (vm, node, from_frame, /* is_ip4 */ 1);
1024 VLIB_NODE_FN (wg6_input_post_node)
1025 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
1027 return wg_input_post (vm, node, from_frame, /* is_ip4 */ 0);
1031 VLIB_REGISTER_NODE (wg4_input_node) =
1033 .name = "wg4-input",
1034 .vector_size = sizeof (u32),
1035 .format_trace = format_wg_input_trace,
1036 .type = VLIB_NODE_TYPE_INTERNAL,
1037 .n_errors = ARRAY_LEN (wg_input_error_strings),
1038 .error_strings = wg_input_error_strings,
1039 .n_next_nodes = WG_INPUT_N_NEXT,
1040 /* edit / add dispositions here */
1042 [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg4-handshake-handoff",
1043 [WG_INPUT_NEXT_HANDOFF_DATA] = "wg4-input-data-handoff",
1044 [WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1045 [WG_INPUT_NEXT_IP6_INPUT] = "ip6-input",
1046 [WG_INPUT_NEXT_PUNT] = "error-punt",
1047 [WG_INPUT_NEXT_ERROR] = "error-drop",
1051 VLIB_REGISTER_NODE (wg6_input_node) =
1053 .name = "wg6-input",
1054 .vector_size = sizeof (u32),
1055 .format_trace = format_wg_input_trace,
1056 .type = VLIB_NODE_TYPE_INTERNAL,
1057 .n_errors = ARRAY_LEN (wg_input_error_strings),
1058 .error_strings = wg_input_error_strings,
1059 .n_next_nodes = WG_INPUT_N_NEXT,
1060 /* edit / add dispositions here */
1062 [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg6-handshake-handoff",
1063 [WG_INPUT_NEXT_HANDOFF_DATA] = "wg6-input-data-handoff",
1064 [WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1065 [WG_INPUT_NEXT_IP6_INPUT] = "ip6-input",
1066 [WG_INPUT_NEXT_PUNT] = "error-punt",
1067 [WG_INPUT_NEXT_ERROR] = "error-drop",
1071 VLIB_REGISTER_NODE (wg4_input_post_node) = {
1072 .name = "wg4-input-post-node",
1073 .vector_size = sizeof (u32),
1074 .format_trace = format_wg_input_post_trace,
1075 .type = VLIB_NODE_TYPE_INTERNAL,
1076 .sibling_of = "wg4-input",
1078 .n_errors = ARRAY_LEN (wg_input_error_strings),
1079 .error_strings = wg_input_error_strings,
1082 VLIB_REGISTER_NODE (wg6_input_post_node) = {
1083 .name = "wg6-input-post-node",
1084 .vector_size = sizeof (u32),
1085 .format_trace = format_wg_input_post_trace,
1086 .type = VLIB_NODE_TYPE_INTERNAL,
1087 .sibling_of = "wg6-input",
1089 .n_errors = ARRAY_LEN (wg_input_error_strings),
1090 .error_strings = wg_input_error_strings,
1096 * fd.io coding-style-patch-verification: ON
1099 * eval: (c-set-style "gnu")