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 case MESSAGE_HANDSHAKE_RESPONSE:
273 message_handshake_response_t *resp = current_b_data;
275 if (packet_needs_cookie)
277 if (!wg_send_handshake_cookie (vm, resp->sender_index,
278 &wg_if->cookie_checker, macs,
279 &ip_addr_46 (&wg_if->src_ip),
280 wg_if->port, &src_ip, udp_src_port))
281 return WG_INPUT_ERROR_COOKIE_SEND;
283 return WG_INPUT_ERROR_NONE;
286 index_t peeri = INDEX_INVALID;
288 wg_index_table_lookup (&wmp->index_table, resp->receiver_index);
290 if (PREDICT_TRUE (entry != NULL))
293 peer = wg_peer_get (peeri);
294 if (wg_peer_is_dead (peer))
295 return WG_INPUT_ERROR_PEER;
298 return WG_INPUT_ERROR_PEER;
300 if (!noise_consume_response
301 (vm, &peer->remote, resp->sender_index,
302 resp->receiver_index, resp->unencrypted_ephemeral,
303 resp->encrypted_nothing))
305 return WG_INPUT_ERROR_PEER;
308 wg_peer_update_endpoint (peeri, &src_ip, udp_src_port);
310 if (noise_remote_begin_session (vm, &peer->remote))
313 wg_timers_session_derived (peer);
314 wg_timers_handshake_complete (peer);
315 if (PREDICT_FALSE (!wg_send_keepalive (vm, peer)))
317 vlib_node_increment_counter (vm, node_idx,
318 WG_INPUT_ERROR_KEEPALIVE_SEND, 1);
322 wg_peer_update_flags (peeri, WG_PEER_ESTABLISHED, true);
328 return WG_INPUT_ERROR_HANDSHAKE_RECEIVE;
331 wg_timers_any_authenticated_packet_received (peer);
332 wg_timers_any_authenticated_packet_traversal (peer);
333 return WG_INPUT_ERROR_NONE;
336 static_always_inline int
337 wg_input_post_process (vlib_main_t *vm, vlib_buffer_t *b, u16 *next,
338 wg_peer_t *peer, message_data_t *data,
341 next[0] = WG_INPUT_NEXT_PUNT;
344 if ((kp = wg_get_active_keypair (&peer->remote, data->receiver_index)) ==
348 if (!noise_counter_recv (&kp->kp_ctr, data->counter))
353 u16 encr_len = b->current_length - sizeof (message_data_t);
354 u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
356 vlib_buffer_advance (b, sizeof (message_data_t));
357 b->current_length = decr_len;
358 vnet_buffer_offload_flags_clear (b, VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
360 /* Keepalive packet has zero length */
363 *is_keepalive = true;
367 wg_timers_data_received (peer);
369 ip46_address_t src_ip;
370 u8 is_ip4_inner = is_ip4_header (vlib_buffer_get_current (b));
373 ip46_address_set_ip4 (
374 &src_ip, &((ip4_header_t *) vlib_buffer_get_current (b))->src_address);
378 ip46_address_set_ip6 (
379 &src_ip, &((ip6_header_t *) vlib_buffer_get_current (b))->src_address);
382 const fib_prefix_t *allowed_ip;
383 bool allowed = false;
386 * we could make this into an ACL, but the expectation
387 * is that there aren't many allowed IPs and thus a linear
388 * walk is faster than an ACL
390 vec_foreach (allowed_ip, peer->allowed_ips)
392 if (fib_prefix_is_cover_addr_46 (allowed_ip, &src_ip))
400 vnet_buffer (b)->sw_if_index[VLIB_RX] = peer->wg_sw_if_index;
402 is_ip4_inner ? WG_INPUT_NEXT_IP4_INPUT : WG_INPUT_NEXT_IP6_INPUT;
408 static_always_inline void
409 wg_input_process_ops (vlib_main_t *vm, vlib_node_runtime_t *node,
410 vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts,
413 u32 n_fail, n_ops = vec_len (ops);
414 vnet_crypto_op_t *op = ops;
419 n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
423 ASSERT (op - ops < n_ops);
425 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
427 u32 bi = op->user_data;
428 b[bi]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
429 nexts[bi] = drop_next;
437 wg_prepare_sync_dec_op (vlib_main_t *vm, vnet_crypto_op_t **crypto_ops,
438 u8 *src, u32 src_len, u8 *dst, u8 *aad, u32 aad_len,
439 vnet_crypto_key_index_t key_index, u32 bi, u8 *iv)
441 vnet_crypto_op_t _op, *op = &_op;
444 vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
445 vnet_crypto_op_init (op, VNET_CRYPTO_OP_CHACHA20_POLY1305_DEC);
447 op->tag_len = NOISE_AUTHTAG_LEN;
448 op->tag = src + src_len;
449 op->src = !src ? src_ : src;
452 op->key_index = key_index;
454 op->aad_len = aad_len;
457 op->flags |= VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
460 static_always_inline void
461 wg_input_add_to_frame (vlib_main_t *vm, vnet_crypto_async_frame_t *f,
462 u32 key_index, u32 crypto_len, i16 crypto_start_offset,
463 u32 buffer_index, u16 next_node, u8 *iv, u8 *tag,
466 vnet_crypto_async_frame_elt_t *fe;
469 ASSERT (f->n_elts < VNET_CRYPTO_FRAME_SIZE);
472 fe = &f->elts[index];
474 fe->key_index = key_index;
475 fe->crypto_total_length = crypto_len;
476 fe->crypto_start_offset = crypto_start_offset;
480 f->buffer_indices[index] = buffer_index;
481 f->next_node_index[index] = next_node;
484 static_always_inline enum noise_state_crypt
485 wg_input_process (vlib_main_t *vm, wg_per_thread_data_t *ptd,
486 vnet_crypto_op_t **crypto_ops,
487 vnet_crypto_async_frame_t **async_frame, vlib_buffer_t *b,
488 u32 buf_idx, noise_remote_t *r, uint32_t r_idx,
489 uint64_t nonce, uint8_t *src, size_t srclen, uint8_t *dst,
490 u32 from_idx, u8 *iv, f64 time, u8 is_async,
494 enum noise_state_crypt ret = SC_FAILED;
496 if ((kp = wg_get_active_keypair (r, r_idx)) == NULL)
501 /* We confirm that our values are within our tolerances. These values
502 * are the same as the encrypt routine.
504 * kp_ctr isn't locked here, we're happy to accept a racy read. */
505 if (wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME,
507 kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES)
510 /* Decrypt, then validate the counter. We don't want to validate the
511 * counter before decrypting as we do not know the message is authentic
512 * prior to decryption. */
514 clib_memset (iv, 0, 4);
515 clib_memcpy (iv + 4, &nonce, sizeof (nonce));
519 if (NULL == *async_frame ||
520 vnet_crypto_async_frame_is_full (*async_frame))
522 *async_frame = vnet_crypto_async_get_frame (
523 vm, VNET_CRYPTO_OP_CHACHA20_POLY1305_TAG16_AAD0_DEC);
524 /* Save the frame to the list we'll submit at the end */
525 vec_add1 (ptd->async_frames, *async_frame);
528 wg_input_add_to_frame (vm, *async_frame, kp->kp_recv_index, srclen,
529 src - b->data, buf_idx, async_next_node, iv,
530 src + srclen, VNET_CRYPTO_OP_FLAG_HMAC_CHECK);
534 wg_prepare_sync_dec_op (vm, crypto_ops, src, srclen, dst, NULL, 0,
535 kp->kp_recv_index, from_idx, iv);
538 /* If we've received the handshake confirming data packet then move the
539 * next keypair into current. If we do slide the next keypair in, then
540 * we skip the REKEY_AFTER_TIME_RECV check. This is safe to do as a
541 * data packet can't confirm a session that we are an INITIATOR of. */
544 clib_rwlock_writer_lock (&r->r_keypair_lock);
545 if (kp == r->r_next && kp->kp_local_index == r_idx)
547 noise_remote_keypair_free (vm, r, &r->r_previous);
548 r->r_previous = r->r_current;
549 r->r_current = r->r_next;
553 clib_rwlock_writer_unlock (&r->r_keypair_lock);
556 clib_rwlock_writer_unlock (&r->r_keypair_lock);
559 /* Similar to when we encrypt, we want to notify the caller when we
560 * are approaching our tolerances. We notify if:
561 * - we're the initiator and the current keypair is older than
562 * REKEY_AFTER_TIME_RECV seconds. */
563 ret = SC_KEEP_KEY_FRESH;
565 if (kp != NULL && kp->kp_valid && kp->kp_is_initiator &&
566 wg_birthdate_has_expired_opt (kp->kp_birthdate, REKEY_AFTER_TIME_RECV,
575 static_always_inline void
576 wg_find_outer_addr_port (vlib_buffer_t *b, ip46_address_t *addr, u16 *port,
581 ip4_udp_header_t *ip4_udp_hdr =
582 vlib_buffer_get_current (b) - sizeof (ip4_udp_header_t);
583 ip46_address_set_ip4 (addr, &ip4_udp_hdr->ip4.src_address);
584 *port = clib_net_to_host_u16 (ip4_udp_hdr->udp.src_port);
588 ip6_udp_header_t *ip6_udp_hdr =
589 vlib_buffer_get_current (b) - sizeof (ip6_udp_header_t);
590 ip46_address_set_ip6 (addr, &ip6_udp_hdr->ip6.src_address);
591 *port = clib_net_to_host_u16 (ip6_udp_hdr->udp.src_port);
596 wg_input_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
597 vlib_frame_t *frame, u8 is_ip4, u16 async_next_node)
599 vnet_main_t *vnm = vnet_get_main ();
600 vnet_interface_main_t *im = &vnm->interface_main;
601 wg_main_t *wmp = &wg_main;
602 wg_per_thread_data_t *ptd =
603 vec_elt_at_index (wmp->per_thread_data, vm->thread_index);
604 u32 *from = vlib_frame_vector_args (frame);
605 u32 n_left_from = frame->n_vectors;
607 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
608 u32 thread_index = vm->thread_index;
609 vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
610 const u16 drop_next = WG_INPUT_NEXT_PUNT;
611 message_type_t header_type;
612 vlib_buffer_t *data_bufs[VLIB_FRAME_SIZE];
613 u32 data_bi[VLIB_FRAME_SIZE]; /* buffer index for data */
614 u32 other_bi[VLIB_FRAME_SIZE]; /* buffer index for drop or handoff */
615 u16 other_nexts[VLIB_FRAME_SIZE], *other_next = other_nexts, n_other = 0;
616 u16 data_nexts[VLIB_FRAME_SIZE], *data_next = data_nexts, n_data = 0;
618 const u8 is_async = wg_op_mode_is_set_ASYNC ();
619 vnet_crypto_async_frame_t *async_frame = NULL;
621 vlib_get_buffers (vm, from, bufs, n_left_from);
622 vec_reset_length (ptd->crypto_ops);
623 vec_reset_length (ptd->async_frames);
625 f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
627 wg_peer_t *peer = NULL;
628 u32 *last_peer_time_idx = NULL;
629 u32 last_rec_idx = ~0;
631 bool is_keepalive = false;
632 u32 *peer_idx = NULL;
633 index_t peeri = INDEX_INVALID;
635 while (n_left_from > 0)
640 vlib_prefetch_buffer_header (b[2], LOAD);
641 p = vlib_buffer_get_current (b[1]);
642 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
643 CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
647 other_next[n_other] = WG_INPUT_NEXT_PUNT;
648 data_nexts[n_data] = WG_INPUT_N_NEXT;
651 ((message_header_t *) vlib_buffer_get_current (b[0]))->type;
653 if (PREDICT_TRUE (header_type == MESSAGE_DATA))
655 message_data_t *data = vlib_buffer_get_current (b[0]);
656 u8 *iv_data = b[0]->pre_data;
657 u32 buf_idx = from[b - bufs];
658 peer_idx = wg_index_table_lookup (&wmp->index_table,
659 data->receiver_index);
661 if (data->receiver_index != last_rec_idx)
663 peer_idx = wg_index_table_lookup (&wmp->index_table,
664 data->receiver_index);
665 if (PREDICT_TRUE (peer_idx != NULL))
668 peer = wg_peer_get (peeri);
669 last_rec_idx = data->receiver_index;
678 if (PREDICT_FALSE (!peer_idx))
680 other_next[n_other] = WG_INPUT_NEXT_ERROR;
681 b[0]->error = node->errors[WG_INPUT_ERROR_PEER];
682 other_bi[n_other] = buf_idx;
687 if (PREDICT_FALSE (~0 == peer->input_thread_index))
689 /* this is the first packet to use this peer, claim the peer
692 clib_atomic_cmp_and_swap (&peer->input_thread_index, ~0,
693 wg_peer_assign_thread (thread_index));
696 if (PREDICT_TRUE (thread_index != peer->input_thread_index))
698 other_next[n_other] = WG_INPUT_NEXT_HANDOFF_DATA;
699 other_bi[n_other] = buf_idx;
704 u16 encr_len = b[0]->current_length - sizeof (message_data_t);
705 u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
706 if (PREDICT_FALSE (decr_len >= WG_DEFAULT_DATA_SIZE))
708 b[0]->error = node->errors[WG_INPUT_ERROR_TOO_BIG];
709 other_bi[n_other] = buf_idx;
714 enum noise_state_crypt state_cr = wg_input_process (
715 vm, ptd, crypto_ops, &async_frame, b[0], buf_idx, &peer->remote,
716 data->receiver_index, data->counter, data->encrypted_data,
717 decr_len, data->encrypted_data, n_data, iv_data, time, is_async,
720 if (PREDICT_FALSE (state_cr == SC_FAILED))
722 wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, false);
723 other_next[n_other] = WG_INPUT_NEXT_ERROR;
724 b[0]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
725 other_bi[n_other] = buf_idx;
731 data_bufs[n_data] = b[0];
732 data_bi[n_data] = buf_idx;
740 if (PREDICT_FALSE (state_cr == SC_CONN_RESET))
742 wg_timers_handshake_complete (peer);
745 else if (PREDICT_FALSE (state_cr == SC_KEEP_KEY_FRESH))
747 wg_send_handshake_from_mt (peeri, false);
750 else if (PREDICT_TRUE (state_cr == SC_OK))
755 /* Handshake packets should be processed in main thread */
756 if (thread_index != 0)
758 other_next[n_other] = WG_INPUT_NEXT_HANDOFF_HANDSHAKE;
759 other_bi[n_other] = from[b - bufs];
764 wg_input_error_t ret =
765 wg_handshake_process (vm, wmp, b[0], node->node_index, is_ip4);
766 if (ret != WG_INPUT_ERROR_NONE)
768 other_next[n_other] = WG_INPUT_NEXT_ERROR;
769 b[0]->error = node->errors[ret];
770 other_bi[n_other] = from[b - bufs];
775 other_bi[n_other] = from[b - bufs];
781 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
782 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
784 wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
785 t->type = header_type;
786 t->current_length = b[0]->current_length;
787 t->is_keepalive = is_keepalive;
788 t->peer = peer_idx ? peeri : INDEX_INVALID;
796 /* decrypt packets */
797 wg_input_process_ops (vm, node, ptd->crypto_ops, data_bufs, data_nexts,
800 /* process after decryption */
802 n_left_from = n_data;
804 last_peer_time_idx = NULL;
806 while (n_left_from > 0)
808 bool is_keepalive = false;
809 u32 *peer_idx = NULL;
811 if (PREDICT_FALSE (data_next[0] == WG_INPUT_NEXT_PUNT))
818 vlib_prefetch_buffer_header (b[2], LOAD);
819 p = vlib_buffer_get_current (b[1]);
820 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
821 CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
825 message_data_t *data = vlib_buffer_get_current (b[0]);
826 ip46_address_t out_src_ip;
827 u16 out_udp_src_port;
829 wg_find_outer_addr_port (b[0], &out_src_ip, &out_udp_src_port, is_ip4);
831 if (data->receiver_index != last_rec_idx)
834 wg_index_table_lookup (&wmp->index_table, data->receiver_index);
835 if (PREDICT_TRUE (peer_idx != NULL))
838 peer = wg_peer_get (peeri);
839 last_rec_idx = data->receiver_index;
848 if (PREDICT_TRUE (peer != NULL))
850 if (PREDICT_FALSE (wg_input_post_process (vm, b[0], data_next, peer,
851 data, &is_keepalive) < 0))
856 data_next[0] = WG_INPUT_NEXT_PUNT;
860 if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
863 !ip46_address_is_equal (&peer->dst.addr, &out_src_ip) ||
864 peer->dst.port != out_udp_src_port))
865 wg_peer_update_endpoint_from_mt (peeri, &out_src_ip,
867 wg_timers_any_authenticated_packet_received_opt (peer, time);
868 wg_timers_any_authenticated_packet_traversal (peer);
869 wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, true);
870 last_peer_time_idx = peer_idx;
873 vlib_increment_combined_counter (im->combined_sw_if_counters +
874 VNET_INTERFACE_COUNTER_RX,
875 vm->thread_index, peer->wg_sw_if_index,
876 1 /* packets */, b[0]->current_length);
879 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
880 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
882 wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
883 t->type = header_type;
884 t->current_length = b[0]->current_length;
885 t->is_keepalive = is_keepalive;
886 t->peer = peer_idx ? peeri : INDEX_INVALID;
896 /* submit all of the open frames */
897 vnet_crypto_async_frame_t **async_frame;
898 vec_foreach (async_frame, ptd->async_frames)
901 vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0))
903 u32 n_drop = (*async_frame)->n_elts;
904 u32 *bi = (*async_frame)->buffer_indices;
908 other_bi[index] = bi[0];
909 vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
910 other_nexts[index] = drop_next;
911 b->error = node->errors[WG_INPUT_ERROR_CRYPTO_ENGINE_ERROR];
915 n_other += (*async_frame)->n_elts;
917 vnet_crypto_async_reset_frame (*async_frame);
918 vnet_crypto_async_free_frame (vm, *async_frame);
923 /* enqueue other bufs */
925 vlib_buffer_enqueue_to_next (vm, node, other_bi, other_next, n_other);
927 /* enqueue data bufs */
929 vlib_buffer_enqueue_to_next (vm, node, data_bi, data_nexts, n_data);
931 return frame->n_vectors;
935 wg_input_post (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame,
938 vnet_main_t *vnm = vnet_get_main ();
939 vnet_interface_main_t *im = &vnm->interface_main;
940 wg_main_t *wmp = &wg_main;
941 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
942 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
943 u32 *from = vlib_frame_vector_args (frame);
944 u32 n_left = frame->n_vectors;
945 wg_peer_t *peer = NULL;
946 u32 *peer_idx = NULL;
947 u32 *last_peer_time_idx = NULL;
948 index_t peeri = INDEX_INVALID;
949 u32 last_rec_idx = ~0;
950 f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
952 vlib_get_buffers (vm, from, b, n_left);
956 vlib_prefetch_buffer_header (b[0], LOAD);
957 vlib_prefetch_buffer_header (b[1], LOAD);
965 vlib_prefetch_buffer_header (b[2], LOAD);
966 p = vlib_buffer_get_current (b[1]);
967 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
970 bool is_keepalive = false;
971 message_data_t *data = vlib_buffer_get_current (b[0]);
972 ip46_address_t out_src_ip;
973 u16 out_udp_src_port;
975 wg_find_outer_addr_port (b[0], &out_src_ip, &out_udp_src_port, is_ip4);
977 if (data->receiver_index != last_rec_idx)
980 wg_index_table_lookup (&wmp->index_table, data->receiver_index);
982 if (PREDICT_TRUE (peer_idx != NULL))
985 peer = wg_peer_get (peeri);
986 last_rec_idx = data->receiver_index;
995 if (PREDICT_TRUE (peer != NULL))
997 if (PREDICT_FALSE (wg_input_post_process (vm, b[0], next, peer, data,
1003 next[0] = WG_INPUT_NEXT_PUNT;
1007 if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
1010 !ip46_address_is_equal (&peer->dst.addr, &out_src_ip) ||
1011 peer->dst.port != out_udp_src_port))
1012 wg_peer_update_endpoint_from_mt (peeri, &out_src_ip,
1014 wg_timers_any_authenticated_packet_received_opt (peer, time);
1015 wg_timers_any_authenticated_packet_traversal (peer);
1016 wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, true);
1017 last_peer_time_idx = peer_idx;
1020 vlib_increment_combined_counter (im->combined_sw_if_counters +
1021 VNET_INTERFACE_COUNTER_RX,
1022 vm->thread_index, peer->wg_sw_if_index,
1023 1 /* packets */, b[0]->current_length);
1026 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
1027 (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1029 wg_input_post_trace_t *t =
1030 vlib_add_trace (vm, node, b[0], sizeof (*t));
1032 t->peer = peer_idx ? peeri : INDEX_INVALID;
1040 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1041 return frame->n_vectors;
1044 VLIB_NODE_FN (wg4_input_node)
1045 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1047 return wg_input_inline (vm, node, frame, /* is_ip4 */ 1,
1048 wg_decrypt_async_next.wg4_post_next);
1051 VLIB_NODE_FN (wg6_input_node)
1052 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1054 return wg_input_inline (vm, node, frame, /* is_ip4 */ 0,
1055 wg_decrypt_async_next.wg6_post_next);
1058 VLIB_NODE_FN (wg4_input_post_node)
1059 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
1061 return wg_input_post (vm, node, from_frame, /* is_ip4 */ 1);
1064 VLIB_NODE_FN (wg6_input_post_node)
1065 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
1067 return wg_input_post (vm, node, from_frame, /* is_ip4 */ 0);
1071 VLIB_REGISTER_NODE (wg4_input_node) =
1073 .name = "wg4-input",
1074 .vector_size = sizeof (u32),
1075 .format_trace = format_wg_input_trace,
1076 .type = VLIB_NODE_TYPE_INTERNAL,
1077 .n_errors = ARRAY_LEN (wg_input_error_strings),
1078 .error_strings = wg_input_error_strings,
1079 .n_next_nodes = WG_INPUT_N_NEXT,
1080 /* edit / add dispositions here */
1082 [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg4-handshake-handoff",
1083 [WG_INPUT_NEXT_HANDOFF_DATA] = "wg4-input-data-handoff",
1084 [WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1085 [WG_INPUT_NEXT_IP6_INPUT] = "ip6-input",
1086 [WG_INPUT_NEXT_PUNT] = "error-punt",
1087 [WG_INPUT_NEXT_ERROR] = "error-drop",
1091 VLIB_REGISTER_NODE (wg6_input_node) =
1093 .name = "wg6-input",
1094 .vector_size = sizeof (u32),
1095 .format_trace = format_wg_input_trace,
1096 .type = VLIB_NODE_TYPE_INTERNAL,
1097 .n_errors = ARRAY_LEN (wg_input_error_strings),
1098 .error_strings = wg_input_error_strings,
1099 .n_next_nodes = WG_INPUT_N_NEXT,
1100 /* edit / add dispositions here */
1102 [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg6-handshake-handoff",
1103 [WG_INPUT_NEXT_HANDOFF_DATA] = "wg6-input-data-handoff",
1104 [WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1105 [WG_INPUT_NEXT_IP6_INPUT] = "ip6-input",
1106 [WG_INPUT_NEXT_PUNT] = "error-punt",
1107 [WG_INPUT_NEXT_ERROR] = "error-drop",
1111 VLIB_REGISTER_NODE (wg4_input_post_node) = {
1112 .name = "wg4-input-post-node",
1113 .vector_size = sizeof (u32),
1114 .format_trace = format_wg_input_post_trace,
1115 .type = VLIB_NODE_TYPE_INTERNAL,
1116 .sibling_of = "wg4-input",
1118 .n_errors = ARRAY_LEN (wg_input_error_strings),
1119 .error_strings = wg_input_error_strings,
1122 VLIB_REGISTER_NODE (wg6_input_post_node) = {
1123 .name = "wg6-input-post-node",
1124 .vector_size = sizeof (u32),
1125 .format_trace = format_wg_input_post_trace,
1126 .type = VLIB_NODE_TYPE_INTERNAL,
1127 .sibling_of = "wg6-input",
1129 .n_errors = ARRAY_LEN (wg_input_error_strings),
1130 .error_strings = wg_input_error_strings,
1136 * fd.io coding-style-patch-verification: ON
1139 * eval: (c-set-style "gnu")