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;
348 if ((kp = wg_get_active_keypair (&peer->remote, data->receiver_index)) ==
352 if (!noise_counter_recv (&kp->kp_ctr, data->counter))
357 u16 encr_len = b->current_length - sizeof (message_data_t);
358 u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
360 vlib_buffer_advance (b, sizeof (message_data_t));
361 b->current_length = decr_len;
362 vnet_buffer_offload_flags_clear (b, VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
364 /* Keepalive packet has zero length */
367 *is_keepalive = true;
371 wg_timers_data_received (peer);
373 ip46_address_t src_ip;
374 u8 is_ip4_inner = is_ip4_header (vlib_buffer_get_current (b));
377 ip46_address_set_ip4 (
378 &src_ip, &((ip4_header_t *) vlib_buffer_get_current (b))->src_address);
382 ip46_address_set_ip6 (
383 &src_ip, &((ip6_header_t *) vlib_buffer_get_current (b))->src_address);
386 const fib_prefix_t *allowed_ip;
387 bool allowed = false;
390 * we could make this into an ACL, but the expectation
391 * is that there aren't many allowed IPs and thus a linear
392 * walk is faster than an ACL
394 vec_foreach (allowed_ip, peer->allowed_ips)
396 if (fib_prefix_is_cover_addr_46 (allowed_ip, &src_ip))
404 vnet_buffer (b)->sw_if_index[VLIB_RX] = peer->wg_sw_if_index;
406 is_ip4_inner ? WG_INPUT_NEXT_IP4_INPUT : WG_INPUT_NEXT_IP6_INPUT;
412 static_always_inline void
413 wg_input_process_ops (vlib_main_t *vm, vlib_node_runtime_t *node,
414 vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts,
417 u32 n_fail, n_ops = vec_len (ops);
418 vnet_crypto_op_t *op = ops;
423 n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
427 ASSERT (op - ops < n_ops);
429 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
431 u32 bi = op->user_data;
432 b[bi]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
433 nexts[bi] = drop_next;
441 wg_prepare_sync_dec_op (vlib_main_t *vm, vnet_crypto_op_t **crypto_ops,
442 u8 *src, u32 src_len, u8 *dst, u8 *aad, u32 aad_len,
443 vnet_crypto_key_index_t key_index, u32 bi, u8 *iv)
445 vnet_crypto_op_t _op, *op = &_op;
448 vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
449 vnet_crypto_op_init (op, VNET_CRYPTO_OP_CHACHA20_POLY1305_DEC);
451 op->tag_len = NOISE_AUTHTAG_LEN;
452 op->tag = src + src_len;
453 op->src = !src ? src_ : src;
456 op->key_index = key_index;
458 op->aad_len = aad_len;
461 op->flags |= VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
464 static_always_inline void
465 wg_input_add_to_frame (vlib_main_t *vm, vnet_crypto_async_frame_t *f,
466 u32 key_index, u32 crypto_len, i16 crypto_start_offset,
467 u32 buffer_index, u16 next_node, u8 *iv, u8 *tag,
470 vnet_crypto_async_frame_elt_t *fe;
473 ASSERT (f->n_elts < VNET_CRYPTO_FRAME_SIZE);
476 fe = &f->elts[index];
478 fe->key_index = key_index;
479 fe->crypto_total_length = crypto_len;
480 fe->crypto_start_offset = crypto_start_offset;
484 f->buffer_indices[index] = buffer_index;
485 f->next_node_index[index] = next_node;
488 static_always_inline enum noise_state_crypt
489 wg_input_process (vlib_main_t *vm, wg_per_thread_data_t *ptd,
490 vnet_crypto_op_t **crypto_ops,
491 vnet_crypto_async_frame_t **async_frame, vlib_buffer_t *b,
492 u32 buf_idx, noise_remote_t *r, uint32_t r_idx,
493 uint64_t nonce, uint8_t *src, size_t srclen, uint8_t *dst,
494 u32 from_idx, u8 *iv, f64 time, u8 is_async,
498 enum noise_state_crypt ret = SC_FAILED;
500 if ((kp = wg_get_active_keypair (r, r_idx)) == NULL)
505 /* We confirm that our values are within our tolerances. These values
506 * are the same as the encrypt routine.
508 * kp_ctr isn't locked here, we're happy to accept a racy read. */
509 if (wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME,
511 kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES)
514 /* Decrypt, then validate the counter. We don't want to validate the
515 * counter before decrypting as we do not know the message is authentic
516 * prior to decryption. */
518 clib_memset (iv, 0, 4);
519 clib_memcpy (iv + 4, &nonce, sizeof (nonce));
523 if (NULL == *async_frame ||
524 vnet_crypto_async_frame_is_full (*async_frame))
526 *async_frame = vnet_crypto_async_get_frame (
527 vm, VNET_CRYPTO_OP_CHACHA20_POLY1305_TAG16_AAD0_DEC);
528 /* Save the frame to the list we'll submit at the end */
529 vec_add1 (ptd->async_frames, *async_frame);
532 wg_input_add_to_frame (vm, *async_frame, kp->kp_recv_index, srclen,
533 src - b->data, buf_idx, async_next_node, iv,
534 src + srclen, VNET_CRYPTO_OP_FLAG_HMAC_CHECK);
538 wg_prepare_sync_dec_op (vm, crypto_ops, src, srclen, dst, NULL, 0,
539 kp->kp_recv_index, from_idx, iv);
542 /* If we've received the handshake confirming data packet then move the
543 * next keypair into current. If we do slide the next keypair in, then
544 * we skip the REKEY_AFTER_TIME_RECV check. This is safe to do as a
545 * data packet can't confirm a session that we are an INITIATOR of. */
548 clib_rwlock_writer_lock (&r->r_keypair_lock);
549 if (kp == r->r_next && kp->kp_local_index == r_idx)
551 noise_remote_keypair_free (vm, r, &r->r_previous);
552 r->r_previous = r->r_current;
553 r->r_current = r->r_next;
557 clib_rwlock_writer_unlock (&r->r_keypair_lock);
560 clib_rwlock_writer_unlock (&r->r_keypair_lock);
563 /* Similar to when we encrypt, we want to notify the caller when we
564 * are approaching our tolerances. We notify if:
565 * - we're the initiator and the current keypair is older than
566 * REKEY_AFTER_TIME_RECV seconds. */
567 ret = SC_KEEP_KEY_FRESH;
569 if (kp != NULL && kp->kp_valid && kp->kp_is_initiator &&
570 wg_birthdate_has_expired_opt (kp->kp_birthdate, REKEY_AFTER_TIME_RECV,
579 static_always_inline void
580 wg_find_outer_addr_port (vlib_buffer_t *b, ip46_address_t *addr, u16 *port,
585 ip4_udp_header_t *ip4_udp_hdr =
586 vlib_buffer_get_current (b) - sizeof (ip4_udp_header_t);
587 ip46_address_set_ip4 (addr, &ip4_udp_hdr->ip4.src_address);
588 *port = clib_net_to_host_u16 (ip4_udp_hdr->udp.src_port);
592 ip6_udp_header_t *ip6_udp_hdr =
593 vlib_buffer_get_current (b) - sizeof (ip6_udp_header_t);
594 ip46_address_set_ip6 (addr, &ip6_udp_hdr->ip6.src_address);
595 *port = clib_net_to_host_u16 (ip6_udp_hdr->udp.src_port);
600 wg_input_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
601 vlib_frame_t *frame, u8 is_ip4, u16 async_next_node)
603 vnet_main_t *vnm = vnet_get_main ();
604 vnet_interface_main_t *im = &vnm->interface_main;
605 wg_main_t *wmp = &wg_main;
606 wg_per_thread_data_t *ptd =
607 vec_elt_at_index (wmp->per_thread_data, vm->thread_index);
608 u32 *from = vlib_frame_vector_args (frame);
609 u32 n_left_from = frame->n_vectors;
611 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
612 u32 thread_index = vm->thread_index;
613 vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
614 const u16 drop_next = WG_INPUT_NEXT_PUNT;
615 message_type_t header_type;
616 vlib_buffer_t *data_bufs[VLIB_FRAME_SIZE];
617 u32 data_bi[VLIB_FRAME_SIZE]; /* buffer index for data */
618 u32 other_bi[VLIB_FRAME_SIZE]; /* buffer index for drop or handoff */
619 u16 other_nexts[VLIB_FRAME_SIZE], *other_next = other_nexts, n_other = 0;
620 u16 data_nexts[VLIB_FRAME_SIZE], *data_next = data_nexts, n_data = 0;
622 const u8 is_async = wg_op_mode_is_set_ASYNC ();
623 vnet_crypto_async_frame_t *async_frame = NULL;
625 vlib_get_buffers (vm, from, bufs, n_left_from);
626 vec_reset_length (ptd->crypto_ops);
627 vec_reset_length (ptd->async_frames);
629 f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
631 wg_peer_t *peer = NULL;
632 u32 *last_peer_time_idx = NULL;
633 u32 last_rec_idx = ~0;
635 bool is_keepalive = false;
636 u32 *peer_idx = NULL;
637 index_t peeri = INDEX_INVALID;
639 while (n_left_from > 0)
644 vlib_prefetch_buffer_header (b[2], LOAD);
645 p = vlib_buffer_get_current (b[1]);
646 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
647 CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
651 other_next[n_other] = WG_INPUT_NEXT_PUNT;
652 data_nexts[n_data] = WG_INPUT_N_NEXT;
655 ((message_header_t *) vlib_buffer_get_current (b[0]))->type;
657 if (PREDICT_TRUE (header_type == MESSAGE_DATA))
659 message_data_t *data = vlib_buffer_get_current (b[0]);
660 u8 *iv_data = b[0]->pre_data;
661 u32 buf_idx = from[b - bufs];
662 peer_idx = wg_index_table_lookup (&wmp->index_table,
663 data->receiver_index);
665 if (data->receiver_index != last_rec_idx)
667 peer_idx = wg_index_table_lookup (&wmp->index_table,
668 data->receiver_index);
669 if (PREDICT_TRUE (peer_idx != NULL))
672 peer = wg_peer_get (peeri);
673 last_rec_idx = data->receiver_index;
682 if (PREDICT_FALSE (!peer_idx))
684 other_next[n_other] = WG_INPUT_NEXT_ERROR;
685 b[0]->error = node->errors[WG_INPUT_ERROR_PEER];
686 other_bi[n_other] = buf_idx;
691 if (PREDICT_FALSE (~0 == peer->input_thread_index))
693 /* this is the first packet to use this peer, claim the peer
696 clib_atomic_cmp_and_swap (&peer->input_thread_index, ~0,
697 wg_peer_assign_thread (thread_index));
700 if (PREDICT_TRUE (thread_index != peer->input_thread_index))
702 other_next[n_other] = WG_INPUT_NEXT_HANDOFF_DATA;
703 other_bi[n_other] = buf_idx;
708 u16 encr_len = b[0]->current_length - sizeof (message_data_t);
709 u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
710 if (PREDICT_FALSE (decr_len >= WG_DEFAULT_DATA_SIZE))
712 b[0]->error = node->errors[WG_INPUT_ERROR_TOO_BIG];
713 other_bi[n_other] = buf_idx;
718 enum noise_state_crypt state_cr = wg_input_process (
719 vm, ptd, crypto_ops, &async_frame, b[0], buf_idx, &peer->remote,
720 data->receiver_index, data->counter, data->encrypted_data,
721 decr_len, data->encrypted_data, n_data, iv_data, time, is_async,
724 if (PREDICT_FALSE (state_cr == SC_FAILED))
726 wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, false);
727 other_next[n_other] = WG_INPUT_NEXT_ERROR;
728 b[0]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
729 other_bi[n_other] = buf_idx;
735 data_bufs[n_data] = b[0];
736 data_bi[n_data] = buf_idx;
744 if (PREDICT_FALSE (state_cr == SC_CONN_RESET))
746 wg_timers_handshake_complete (peer);
749 else if (PREDICT_FALSE (state_cr == SC_KEEP_KEY_FRESH))
751 wg_send_handshake_from_mt (peeri, false);
754 else if (PREDICT_TRUE (state_cr == SC_OK))
759 /* Handshake packets should be processed in main thread */
760 if (thread_index != 0)
762 other_next[n_other] = WG_INPUT_NEXT_HANDOFF_HANDSHAKE;
763 other_bi[n_other] = from[b - bufs];
768 wg_input_error_t ret =
769 wg_handshake_process (vm, wmp, b[0], node->node_index, is_ip4);
770 if (ret != WG_INPUT_ERROR_NONE)
772 other_next[n_other] = WG_INPUT_NEXT_ERROR;
773 b[0]->error = node->errors[ret];
774 other_bi[n_other] = from[b - bufs];
779 other_bi[n_other] = from[b - bufs];
785 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
786 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
788 wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
789 t->type = header_type;
790 t->current_length = b[0]->current_length;
791 t->is_keepalive = is_keepalive;
792 t->peer = peer_idx ? peeri : INDEX_INVALID;
800 /* decrypt packets */
801 wg_input_process_ops (vm, node, ptd->crypto_ops, data_bufs, data_nexts,
804 /* process after decryption */
806 n_left_from = n_data;
808 last_peer_time_idx = NULL;
810 while (n_left_from > 0)
812 bool is_keepalive = false;
813 u32 *peer_idx = NULL;
815 if (PREDICT_FALSE (data_next[0] == WG_INPUT_NEXT_PUNT))
822 vlib_prefetch_buffer_header (b[2], LOAD);
823 p = vlib_buffer_get_current (b[1]);
824 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
825 CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
829 message_data_t *data = vlib_buffer_get_current (b[0]);
830 ip46_address_t out_src_ip;
831 u16 out_udp_src_port;
833 wg_find_outer_addr_port (b[0], &out_src_ip, &out_udp_src_port, is_ip4);
835 if (data->receiver_index != last_rec_idx)
838 wg_index_table_lookup (&wmp->index_table, data->receiver_index);
839 if (PREDICT_TRUE (peer_idx != NULL))
842 peer = wg_peer_get (peeri);
843 last_rec_idx = data->receiver_index;
852 if (PREDICT_TRUE (peer != NULL))
854 if (PREDICT_FALSE (wg_input_post_process (vm, b[0], data_next, peer,
855 data, &is_keepalive) < 0))
860 data_next[0] = WG_INPUT_NEXT_PUNT;
864 if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
867 !ip46_address_is_equal (&peer->dst.addr, &out_src_ip) ||
868 peer->dst.port != out_udp_src_port))
869 wg_peer_update_endpoint_from_mt (peeri, &out_src_ip,
871 wg_timers_any_authenticated_packet_received_opt (peer, time);
872 wg_timers_any_authenticated_packet_traversal (peer);
873 last_peer_time_idx = peer_idx;
876 vlib_increment_combined_counter (im->combined_sw_if_counters +
877 VNET_INTERFACE_COUNTER_RX,
878 vm->thread_index, peer->wg_sw_if_index,
879 1 /* packets */, b[0]->current_length);
882 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
883 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
885 wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
886 t->type = header_type;
887 t->current_length = b[0]->current_length;
888 t->is_keepalive = is_keepalive;
889 t->peer = peer_idx ? peeri : INDEX_INVALID;
899 /* submit all of the open frames */
900 vnet_crypto_async_frame_t **async_frame;
901 vec_foreach (async_frame, ptd->async_frames)
904 vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0))
906 u32 n_drop = (*async_frame)->n_elts;
907 u32 *bi = (*async_frame)->buffer_indices;
911 other_bi[index] = bi[0];
912 vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
913 other_nexts[index] = drop_next;
914 b->error = node->errors[WG_INPUT_ERROR_CRYPTO_ENGINE_ERROR];
918 n_other += (*async_frame)->n_elts;
920 vnet_crypto_async_reset_frame (*async_frame);
921 vnet_crypto_async_free_frame (vm, *async_frame);
926 /* enqueue other bufs */
928 vlib_buffer_enqueue_to_next (vm, node, other_bi, other_next, n_other);
930 /* enqueue data bufs */
932 vlib_buffer_enqueue_to_next (vm, node, data_bi, data_nexts, n_data);
934 return frame->n_vectors;
938 wg_input_post (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame,
941 vnet_main_t *vnm = vnet_get_main ();
942 vnet_interface_main_t *im = &vnm->interface_main;
943 wg_main_t *wmp = &wg_main;
944 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
945 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
946 u32 *from = vlib_frame_vector_args (frame);
947 u32 n_left = frame->n_vectors;
948 wg_peer_t *peer = NULL;
949 u32 *peer_idx = NULL;
950 u32 *last_peer_time_idx = NULL;
951 index_t peeri = INDEX_INVALID;
952 u32 last_rec_idx = ~0;
953 f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
955 vlib_get_buffers (vm, from, b, n_left);
959 vlib_prefetch_buffer_header (b[0], LOAD);
960 vlib_prefetch_buffer_header (b[1], LOAD);
968 vlib_prefetch_buffer_header (b[2], LOAD);
969 p = vlib_buffer_get_current (b[1]);
970 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
973 bool is_keepalive = false;
974 message_data_t *data = vlib_buffer_get_current (b[0]);
975 ip46_address_t out_src_ip;
976 u16 out_udp_src_port;
978 wg_find_outer_addr_port (b[0], &out_src_ip, &out_udp_src_port, is_ip4);
980 if (data->receiver_index != last_rec_idx)
983 wg_index_table_lookup (&wmp->index_table, data->receiver_index);
985 if (PREDICT_TRUE (peer_idx != NULL))
988 peer = wg_peer_get (peeri);
989 last_rec_idx = data->receiver_index;
998 if (PREDICT_TRUE (peer != NULL))
1000 if (PREDICT_FALSE (wg_input_post_process (vm, b[0], next, peer, data,
1001 &is_keepalive) < 0))
1006 next[0] = WG_INPUT_NEXT_PUNT;
1010 if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
1013 !ip46_address_is_equal (&peer->dst.addr, &out_src_ip) ||
1014 peer->dst.port != out_udp_src_port))
1015 wg_peer_update_endpoint_from_mt (peeri, &out_src_ip,
1017 wg_timers_any_authenticated_packet_received_opt (peer, time);
1018 wg_timers_any_authenticated_packet_traversal (peer);
1019 last_peer_time_idx = peer_idx;
1022 vlib_increment_combined_counter (im->combined_sw_if_counters +
1023 VNET_INTERFACE_COUNTER_RX,
1024 vm->thread_index, peer->wg_sw_if_index,
1025 1 /* packets */, b[0]->current_length);
1028 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
1029 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1031 wg_input_post_trace_t *t =
1032 vlib_add_trace (vm, node, b[0], sizeof (*t));
1034 t->peer = peer_idx ? peeri : INDEX_INVALID;
1042 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1043 return frame->n_vectors;
1046 VLIB_NODE_FN (wg4_input_node)
1047 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1049 return wg_input_inline (vm, node, frame, /* is_ip4 */ 1,
1050 wg_decrypt_async_next.wg4_post_next);
1053 VLIB_NODE_FN (wg6_input_node)
1054 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1056 return wg_input_inline (vm, node, frame, /* is_ip4 */ 0,
1057 wg_decrypt_async_next.wg6_post_next);
1060 VLIB_NODE_FN (wg4_input_post_node)
1061 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
1063 return wg_input_post (vm, node, from_frame, /* is_ip4 */ 1);
1066 VLIB_NODE_FN (wg6_input_post_node)
1067 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
1069 return wg_input_post (vm, node, from_frame, /* is_ip4 */ 0);
1073 VLIB_REGISTER_NODE (wg4_input_node) =
1075 .name = "wg4-input",
1076 .vector_size = sizeof (u32),
1077 .format_trace = format_wg_input_trace,
1078 .type = VLIB_NODE_TYPE_INTERNAL,
1079 .n_errors = ARRAY_LEN (wg_input_error_strings),
1080 .error_strings = wg_input_error_strings,
1081 .n_next_nodes = WG_INPUT_N_NEXT,
1082 /* edit / add dispositions here */
1084 [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg4-handshake-handoff",
1085 [WG_INPUT_NEXT_HANDOFF_DATA] = "wg4-input-data-handoff",
1086 [WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1087 [WG_INPUT_NEXT_IP6_INPUT] = "ip6-input",
1088 [WG_INPUT_NEXT_PUNT] = "error-punt",
1089 [WG_INPUT_NEXT_ERROR] = "error-drop",
1093 VLIB_REGISTER_NODE (wg6_input_node) =
1095 .name = "wg6-input",
1096 .vector_size = sizeof (u32),
1097 .format_trace = format_wg_input_trace,
1098 .type = VLIB_NODE_TYPE_INTERNAL,
1099 .n_errors = ARRAY_LEN (wg_input_error_strings),
1100 .error_strings = wg_input_error_strings,
1101 .n_next_nodes = WG_INPUT_N_NEXT,
1102 /* edit / add dispositions here */
1104 [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg6-handshake-handoff",
1105 [WG_INPUT_NEXT_HANDOFF_DATA] = "wg6-input-data-handoff",
1106 [WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1107 [WG_INPUT_NEXT_IP6_INPUT] = "ip6-input",
1108 [WG_INPUT_NEXT_PUNT] = "error-punt",
1109 [WG_INPUT_NEXT_ERROR] = "error-drop",
1113 VLIB_REGISTER_NODE (wg4_input_post_node) = {
1114 .name = "wg4-input-post-node",
1115 .vector_size = sizeof (u32),
1116 .format_trace = format_wg_input_post_trace,
1117 .type = VLIB_NODE_TYPE_INTERNAL,
1118 .sibling_of = "wg4-input",
1120 .n_errors = ARRAY_LEN (wg_input_error_strings),
1121 .error_strings = wg_input_error_strings,
1124 VLIB_REGISTER_NODE (wg6_input_post_node) = {
1125 .name = "wg6-input-post-node",
1126 .vector_size = sizeof (u32),
1127 .format_trace = format_wg_input_post_trace,
1128 .type = VLIB_NODE_TYPE_INTERNAL,
1129 .sibling_of = "wg6-input",
1131 .n_errors = ARRAY_LEN (wg_input_error_strings),
1132 .error_strings = wg_input_error_strings,
1138 * fd.io coding-style-patch-verification: ON
1141 * eval: (c-set-style "gnu")