FD.io VPP  v18.07.1-19-g511ce25
Vector Packet Processing
bfd_udp.c
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1 /*
2  * Copyright (c) 2011-2016 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /**
16  * @file
17  * @brief BFD UDP transport layer implementation
18  */
19 #include <vppinfra/types.h>
20 #include <vlibmemory/api.h>
21 #include <vlib/vlib.h>
22 #include <vlib/buffer.h>
23 #include <vnet/ip/format.h>
24 #include <vnet/ethernet/packet.h>
25 #include <vnet/udp/udp_packet.h>
26 #include <vnet/udp/udp.h>
27 #include <vnet/ip/lookup.h>
28 #include <vnet/ip/icmp46_packet.h>
29 #include <vnet/ip/ip4.h>
30 #include <vnet/ip/ip6.h>
31 #include <vnet/ip/ip6_packet.h>
32 #include <vnet/adj/adj.h>
33 #include <vnet/adj/adj_nbr.h>
34 #include <vnet/dpo/receive_dpo.h>
35 #include <vnet/fib/fib_entry.h>
36 #include <vnet/fib/fib_table.h>
37 #include <vnet/bfd/bfd_debug.h>
38 #include <vnet/bfd/bfd_udp.h>
39 #include <vnet/bfd/bfd_main.h>
40 #include <vnet/bfd/bfd_api.h>
41 
42 typedef struct
43 {
45  /* hashmap - bfd session index by bfd key - used for CLI/API lookup, where
46  * discriminator is unknown */
48  /* convenience variable */
50  /* flag indicating whether echo_source_sw_if_index holds a valid value */
52  /* loopback interface used to get echo source ip */
54  /* node index of "ip4-arp" node */
56  /* node index of "ip6-discover-neighbor" node */
58  /* node index of "ip4-rewrite" node */
60  /* node index of "ip6-rewrite" node */
62  /* log class */
65 
70 
72 
75 {
76  vnet_sw_interface_t *sw_if =
77  vnet_get_sw_interface_safe (bfd_udp_main.vnet_main, sw_if_index);
78  if (sw_if)
79  {
80  bfd_udp_main.echo_source_sw_if_index = sw_if_index;
81  bfd_udp_main.echo_source_is_set = 1;
82  return 0;
83  }
84  return VNET_API_ERROR_BFD_ENOENT;
85 }
86 
89 {
90  bfd_udp_main.echo_source_sw_if_index = ~0;
91  bfd_udp_main.echo_source_is_set = 0;
92  return 0;
93 }
94 
95 int
97 {
98  if (!bfd_udp_main.echo_source_is_set)
99  {
100  BFD_DBG ("UDP echo source not set - echo not available");
101  return 0;
102  }
103  /*
104  * for the echo to work, we need a loopback interface with at least one
105  * address with netmask length at most 31 (ip4) or 127 (ip6) so that we can
106  * pick an unused address from that subnet
107  */
108  vnet_sw_interface_t *sw_if =
110  bfd_udp_main.echo_source_sw_if_index);
111  if (sw_if && sw_if->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
112  {
113  if (BFD_TRANSPORT_UDP4 == transport)
114  {
115  ip4_main_t *im = &ip4_main;
117  /* *INDENT-OFF* */
119  bfd_udp_main.echo_source_sw_if_index,
120  0 /* honor unnumbered */, ({
121  if (ia->address_length <= 31)
122  {
123  return 1;
124  }
125  }));
126  /* *INDENT-ON* */
127  }
128  else if (BFD_TRANSPORT_UDP6 == transport)
129  {
130  ip6_main_t *im = &ip6_main;
132  /* *INDENT-OFF* */
134  bfd_udp_main.echo_source_sw_if_index,
135  0 /* honor unnumbered */, ({
136  if (ia->address_length <= 127)
137  {
138  return 1;
139  }
140  }));
141  /* *INDENT-ON* */
142  }
143  }
144  BFD_DBG ("No usable IP address for UDP echo - echo not available");
145  return 0;
146 }
147 
148 static u16
150 {
151  /* The source port MUST be in the range 49152 through 65535. The same UDP
152  * source port number MUST be used for all BFD Control packets associated
153  * with a particular session. The source port number SHOULD be unique among
154  * all BFD sessions on the system. If more than 16384 BFD sessions are
155  * simultaneously active, UDP source port numbers MAY be reused on
156  * multiple sessions, but the number of distinct uses of the same UDP
157  * source port number SHOULD be minimized.
158  */
159  return 49152 + bs_idx % (65535 - 49152 + 1);
160 }
161 
162 int
164 {
165  if (!bfd_udp_main.echo_source_is_set)
166  {
167  BFD_ERR ("cannot find ip4 address, echo source not set");
168  return 0;
169  }
171  ip4_main_t *im = &ip4_main;
172 
173  /* *INDENT-OFF* */
175  &im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index,
176  0 /* honor unnumbered */, ({
177  ip4_address_t *x =
178  ip_interface_address_get_address (&im->lookup_main, ia);
179  if (ia->address_length <= 31)
180  {
181  addr->as_u32 = clib_host_to_net_u32 (x->as_u32);
182  /*
183  * flip the last bit to get a different address, might be network,
184  * we don't care ...
185  */
186  addr->as_u32 ^= 1;
187  addr->as_u32 = clib_net_to_host_u32 (addr->as_u32);
188  return 1;
189  }
190  }));
191  /* *INDENT-ON* */
192  BFD_ERR ("cannot find ip4 address, no usable address found");
193  return 0;
194 }
195 
196 int
198 {
199  if (!bfd_udp_main.echo_source_is_set)
200  {
201  BFD_ERR ("cannot find ip6 address, echo source not set");
202  return 0;
203  }
205  ip6_main_t *im = &ip6_main;
206 
207  /* *INDENT-OFF* */
209  &im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index,
210  0 /* honor unnumbered */, ({
211  ip6_address_t *x =
212  ip_interface_address_get_address (&im->lookup_main, ia);
213  if (ia->address_length <= 127)
214  {
215  *addr = *x;
216  addr->as_u8[15] ^= 1; /* flip the last bit of the address */
217  return 1;
218  }
219  }));
220  /* *INDENT-ON* */
221  BFD_ERR ("cannot find ip6 address, no usable address found");
222  return 0;
223 }
224 
225 void
226 bfd_udp_get_echo_source (int *is_set, u32 * sw_if_index,
227  int *have_usable_ip4, ip4_address_t * ip4,
228  int *have_usable_ip6, ip6_address_t * ip6)
229 {
230  if (bfd_udp_main.echo_source_is_set)
231  {
232  *is_set = 1;
233  *sw_if_index = bfd_udp_main.echo_source_sw_if_index;
234  *have_usable_ip4 = bfd_udp_get_echo_src_ip4 (ip4);
235  *have_usable_ip6 = bfd_udp_get_echo_src_ip6 (ip6);
236  }
237  else
238  {
239  *is_set = 0;
240  }
241 }
242 
243 int
245  int is_echo)
246 {
247  const bfd_udp_session_t *bus = &bs->udp;
248  const bfd_udp_key_t *key = &bus->key;
249  vlib_buffer_t *b = vlib_get_buffer (vm, bi);
250 
251  b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
252  vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index;
253  vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index;
254  vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
255  vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
256  typedef struct
257  {
258  ip4_header_t ip4;
259  udp_header_t udp;
260  } ip4_udp_headers;
261  ip4_udp_headers *headers = NULL;
262  vlib_buffer_advance (b, -sizeof (*headers));
263  headers = vlib_buffer_get_current (b);
264  memset (headers, 0, sizeof (*headers));
265  headers->ip4.ip_version_and_header_length = 0x45;
266  headers->ip4.ttl = 255;
267  headers->ip4.protocol = IP_PROTOCOL_UDP;
268  headers->udp.src_port =
269  clib_host_to_net_u16 (bfd_udp_bs_idx_to_sport (bs->bs_idx));
270  if (is_echo)
271  {
272  int rv;
273  if (!(rv = bfd_udp_get_echo_src_ip4 (&headers->ip4.src_address)))
274  {
275  return rv;
276  }
277  headers->ip4.dst_address.as_u32 = key->local_addr.ip4.as_u32;
278  headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd_echo4);
279  }
280  else
281  {
282  headers->ip4.src_address.as_u32 = key->local_addr.ip4.as_u32;
283  headers->ip4.dst_address.as_u32 = key->peer_addr.ip4.as_u32;
284  headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd4);
285  }
286 
287  /* fix ip length, checksum and udp length */
288  const u16 ip_length = vlib_buffer_length_in_chain (vm, b);
289 
290  headers->ip4.length = clib_host_to_net_u16 (ip_length);
291  headers->ip4.checksum = ip4_header_checksum (&headers->ip4);
292 
293  const u16 udp_length = ip_length - (sizeof (headers->ip4));
294  headers->udp.length = clib_host_to_net_u16 (udp_length);
295  return 1;
296 }
297 
298 int
300  int is_echo)
301 {
302  const bfd_udp_session_t *bus = &bs->udp;
303  const bfd_udp_key_t *key = &bus->key;
304  vlib_buffer_t *b = vlib_get_buffer (vm, bi);
305 
306  b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
307  vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index;
308  vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index;
309  vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
310  vnet_buffer (b)->sw_if_index[VLIB_TX] = 0;
311  typedef struct
312  {
313  ip6_header_t ip6;
314  udp_header_t udp;
315  } ip6_udp_headers;
316  ip6_udp_headers *headers = NULL;
317  vlib_buffer_advance (b, -sizeof (*headers));
318  headers = vlib_buffer_get_current (b);
319  memset (headers, 0, sizeof (*headers));
320  headers->ip6.ip_version_traffic_class_and_flow_label =
321  clib_host_to_net_u32 (0x6 << 28);
322  headers->ip6.hop_limit = 255;
323  headers->ip6.protocol = IP_PROTOCOL_UDP;
324  headers->udp.src_port =
325  clib_host_to_net_u16 (bfd_udp_bs_idx_to_sport (bs->bs_idx));
326  if (is_echo)
327  {
328  int rv;
329  if (!(rv = bfd_udp_get_echo_src_ip6 (&headers->ip6.src_address)))
330  {
331  return rv;
332  }
333  clib_memcpy (&headers->ip6.dst_address, &key->local_addr.ip6,
334  sizeof (headers->ip6.dst_address));
335 
336  headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd_echo6);
337  }
338  else
339  {
340  clib_memcpy (&headers->ip6.src_address, &key->local_addr.ip6,
341  sizeof (headers->ip6.src_address));
342  clib_memcpy (&headers->ip6.dst_address, &key->peer_addr.ip6,
343  sizeof (headers->ip6.dst_address));
344  headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd6);
345  }
346 
347  /* fix ip payload length and udp length */
348  const u16 udp_length =
349  vlib_buffer_length_in_chain (vm, b) - (sizeof (headers->ip6));
350  headers->udp.length = clib_host_to_net_u16 (udp_length);
351  headers->ip6.payload_length = headers->udp.length;
352 
353  /* IPv6 UDP checksum is mandatory */
354  int bogus = 0;
355  headers->udp.checksum =
356  ip6_tcp_udp_icmp_compute_checksum (vm, b, &headers->ip6, &bogus);
357  ASSERT (bogus == 0);
358  if (headers->udp.checksum == 0)
359  {
360  headers->udp.checksum = 0xffff;
361  }
362  return 1;
363 }
364 
365 static void
367 {
368  vlib_frame_t *f = vlib_get_frame_to_node (vm, next_node);
369  u32 *to_next = vlib_frame_vector_args (f);
370  to_next[0] = bi;
371  f->n_vectors = 1;
372  vlib_put_frame_to_node (vm, next_node, f);
373 }
374 
375 int
376 bfd_udp_calc_next_node (const struct bfd_session_s *bs, u32 * next_node)
377 {
378  const bfd_udp_session_t *bus = &bs->udp;
379  ip_adjacency_t *adj = adj_get (bus->adj_index);
380  switch (adj->lookup_next_index)
381  {
382  case IP_LOOKUP_NEXT_ARP:
383  switch (bs->transport)
384  {
385  case BFD_TRANSPORT_UDP4:
386  *next_node = bfd_udp_main.ip4_arp_idx;
387  return 1;
388  case BFD_TRANSPORT_UDP6:
389  *next_node = bfd_udp_main.ip6_ndp_idx;
390  return 1;
391  }
392  break;
394  switch (bs->transport)
395  {
396  case BFD_TRANSPORT_UDP4:
397  *next_node = bfd_udp_main.ip4_rewrite_idx;
398  return 1;
399  case BFD_TRANSPORT_UDP6:
400  *next_node = bfd_udp_main.ip6_rewrite_idx;
401  return 1;
402  }
403  break;
404  default:
405  /* drop */
406  break;
407  }
408  return 0;
409 }
410 
411 int
413 {
414  u32 next_node;
415  int rv = bfd_udp_calc_next_node (bs, &next_node);
416  if (rv)
417  {
418  bfd_create_frame_to_next_node (vm, bi, next_node);
419  }
420  return rv;
421 }
422 
423 int
425 {
426  u32 next_node;
427  int rv = bfd_udp_calc_next_node (bs, &next_node);
428  if (rv)
429  {
430  bfd_create_frame_to_next_node (vm, bi, next_node);
431  }
432  return 1;
433 }
434 
435 static bfd_session_t *
436 bfd_lookup_session (bfd_udp_main_t * bum, const bfd_udp_key_t * key)
437 {
438  uword *p = mhash_get (&bum->bfd_session_idx_by_bfd_key, key);
439  if (p)
440  {
441  return bfd_find_session_by_idx (bum->bfd_main, *p);
442  }
443  return 0;
444 }
445 
446 static void
447 bfd_udp_key_init (bfd_udp_key_t * key, u32 sw_if_index,
448  const ip46_address_t * local_addr,
449  const ip46_address_t * peer_addr)
450 {
451  memset (key, 0, sizeof (*key));
452  key->sw_if_index = sw_if_index;
453  key->local_addr.as_u64[0] = local_addr->as_u64[0];
454  key->local_addr.as_u64[1] = local_addr->as_u64[1];
455  key->peer_addr.as_u64[0] = peer_addr->as_u64[0];
456  key->peer_addr.as_u64[1] = peer_addr->as_u64[1];
457 }
458 
459 static vnet_api_error_t
461  u32 desired_min_tx_usec,
462  u32 required_min_rx_usec, u8 detect_mult,
463  const ip46_address_t * local_addr,
464  const ip46_address_t * peer_addr,
465  bfd_session_t ** bs_out)
466 {
467  /* get a pool entry and if we end up not needing it, give it back */
468  bfd_transport_e t = BFD_TRANSPORT_UDP4;
469  if (!ip46_address_is_ip4 (local_addr))
470  {
471  t = BFD_TRANSPORT_UDP6;
472  }
473  bfd_session_t *bs = bfd_get_session (bum->bfd_main, t);
474  if (!bs)
475  {
476  bfd_put_session (bum->bfd_main, bs);
477  return VNET_API_ERROR_BFD_EAGAIN;
478  }
479  bfd_udp_session_t *bus = &bs->udp;
480  memset (bus, 0, sizeof (*bus));
481  bfd_udp_key_t *key = &bus->key;
482  bfd_udp_key_init (key, sw_if_index, local_addr, peer_addr);
483  const bfd_session_t *tmp = bfd_lookup_session (bum, key);
484  if (tmp)
485  {
486  vlib_log_err (bum->log_class,
487  "duplicate bfd-udp session, existing bs_idx=%d",
488  tmp->bs_idx);
489  bfd_put_session (bum->bfd_main, bs);
490  return VNET_API_ERROR_BFD_EEXIST;
491  }
492  mhash_set (&bum->bfd_session_idx_by_bfd_key, key, bs->bs_idx, NULL);
493  BFD_DBG ("session created, bs_idx=%u, sw_if_index=%d, local=%U, peer=%U",
494  bs->bs_idx, key->sw_if_index, format_ip46_address,
495  &key->local_addr, IP46_TYPE_ANY, format_ip46_address,
496  &key->peer_addr, IP46_TYPE_ANY);
497  vlib_log_info (bum->log_class, "create BFD session: %U",
498  format_bfd_session, bs);
499  if (BFD_TRANSPORT_UDP4 == t)
500  {
502  &key->peer_addr,
503  key->sw_if_index);
504  BFD_DBG ("adj_nbr_add_or_lock(FIB_PROTOCOL_IP4, VNET_LINK_IP4, %U, %d) "
505  "returns %d", format_ip46_address, &key->peer_addr,
506  IP46_TYPE_ANY, key->sw_if_index, bus->adj_index);
507  }
508  else
509  {
511  &key->peer_addr,
512  key->sw_if_index);
513  BFD_DBG ("adj_nbr_add_or_lock(FIB_PROTOCOL_IP6, VNET_LINK_IP6, %U, %d) "
514  "returns %d", format_ip46_address, &key->peer_addr,
515  IP46_TYPE_ANY, key->sw_if_index, bus->adj_index);
516  }
517  *bs_out = bs;
518  return bfd_session_set_params (bum->bfd_main, bs, desired_min_tx_usec,
519  required_min_rx_usec, detect_mult);
520 }
521 
522 static vnet_api_error_t
524  const ip46_address_t * local_addr,
525  const ip46_address_t * peer_addr)
526 {
528  vnet_sw_interface_t *sw_if =
529  vnet_get_sw_interface_safe (bfd_udp_main.vnet_main, sw_if_index);
530  u8 local_ip_valid = 0;
532  if (!sw_if)
533  {
534  vlib_log_err (bum->log_class,
535  "got NULL sw_if when getting interface by index %u",
536  sw_if_index);
537  return VNET_API_ERROR_INVALID_SW_IF_INDEX;
538  }
539  if (ip46_address_is_ip4 (local_addr))
540  {
541  if (!ip46_address_is_ip4 (peer_addr))
542  {
543  vlib_log_err (bum->log_class,
544  "IP family mismatch (local is ipv4, peer is ipv6)");
545  return VNET_API_ERROR_INVALID_ARGUMENT;
546  }
547  ip4_main_t *im = &ip4_main;
548 
549  /* *INDENT-OFF* */
551  &im->lookup_main, ia, sw_if_index, 0 /* honor unnumbered */, ({
552  ip4_address_t *x =
553  ip_interface_address_get_address (&im->lookup_main, ia);
554  if (x->as_u32 == local_addr->ip4.as_u32)
555  {
556  /* valid address for this interface */
557  local_ip_valid = 1;
558  break;
559  }
560  }));
561  /* *INDENT-ON* */
562  }
563  else
564  {
565  if (ip46_address_is_ip4 (peer_addr))
566  {
567  vlib_log_err (bum->log_class,
568  "IP family mismatch (local is ipv6, peer is ipv4)");
569  return VNET_API_ERROR_INVALID_ARGUMENT;
570  }
571  ip6_main_t *im = &ip6_main;
572  /* *INDENT-OFF* */
574  &im->lookup_main, ia, sw_if_index, 0 /* honor unnumbered */, ({
575  ip6_address_t *x =
576  ip_interface_address_get_address (&im->lookup_main, ia);
577  if (local_addr->ip6.as_u64[0] == x->as_u64[0] &&
578  local_addr->ip6.as_u64[1] == x->as_u64[1])
579  {
580  /* valid address for this interface */
581  local_ip_valid = 1;
582  break;
583  }
584  }));
585  /* *INDENT-ON* */
586  }
587 
588  if (!local_ip_valid)
589  {
590  vlib_log_err (bum->log_class,
591  "local address %U not found on interface with index %u",
592  format_ip46_address, local_addr, IP46_TYPE_ANY,
593  sw_if_index);
594  return VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
595  }
596 
597  return 0;
598 }
599 
600 static vnet_api_error_t
602  const ip46_address_t * local_addr,
603  const ip46_address_t * peer_addr,
604  bfd_session_t ** bs_out)
605 {
606  vnet_api_error_t rv =
607  bfd_udp_validate_api_input (sw_if_index, local_addr, peer_addr);
608  if (!rv)
609  {
611  bfd_udp_key_t key;
612  bfd_udp_key_init (&key, sw_if_index, local_addr, peer_addr);
613  bfd_session_t *bs = bfd_lookup_session (bum, &key);
614  if (bs)
615  {
616  *bs_out = bs;
617  }
618  else
619  {
620  vlib_log_err (bum->log_class,
621  "BFD session not found, sw_if_index=%u, local=%U, peer=%U",
622  sw_if_index, format_ip46_address, local_addr,
624  IP46_TYPE_ANY);
625  return VNET_API_ERROR_BFD_ENOENT;
626  }
627  }
628  return rv;
629 }
630 
631 static vnet_api_error_t
632 bfd_api_verify_common (u32 sw_if_index, u32 desired_min_tx_usec,
633  u32 required_min_rx_usec, u8 detect_mult,
634  const ip46_address_t * local_addr,
635  const ip46_address_t * peer_addr)
636 {
638  vnet_api_error_t rv =
639  bfd_udp_validate_api_input (sw_if_index, local_addr, peer_addr);
640  if (rv)
641  {
642  return rv;
643  }
644  if (detect_mult < 1)
645  {
646  vlib_log_err (bum->log_class, "detect_mult < 1");
647  return VNET_API_ERROR_INVALID_ARGUMENT;
648  }
649  if (desired_min_tx_usec < 1)
650  {
651  vlib_log_err (bum->log_class, "desired_min_tx_usec < 1");
652  return VNET_API_ERROR_INVALID_ARGUMENT;
653  }
654  return 0;
655 }
656 
657 static void
659 {
661  BFD_DBG ("free bfd-udp session, bs_idx=%d", bs->bs_idx);
663  adj_unlock (bs->udp.adj_index);
664  bfd_put_session (bum->bfd_main, bs);
665 }
666 
668 bfd_udp_add_session (u32 sw_if_index, const ip46_address_t * local_addr,
669  const ip46_address_t * peer_addr,
670  u32 desired_min_tx_usec, u32 required_min_rx_usec,
671  u8 detect_mult, u8 is_authenticated, u32 conf_key_id,
672  u8 bfd_key_id)
673 {
674  vnet_api_error_t rv =
675  bfd_api_verify_common (sw_if_index, desired_min_tx_usec,
676  required_min_rx_usec, detect_mult,
677  local_addr, peer_addr);
678  bfd_session_t *bs = NULL;
679  if (!rv)
680  {
681  rv =
682  bfd_udp_add_session_internal (&bfd_udp_main, sw_if_index,
683  desired_min_tx_usec,
684  required_min_rx_usec, detect_mult,
685  local_addr, peer_addr, &bs);
686  }
687  if (!rv && is_authenticated)
688  {
689 #if WITH_LIBSSL > 0
690  rv = bfd_auth_activate (bs, conf_key_id, bfd_key_id,
691  0 /* is not delayed */ );
692 #else
693  vlib_log_err (bfd_udp_main.log_class,
694  "SSL missing, cannot add authenticated BFD session");
695  rv = VNET_API_ERROR_BFD_NOTSUPP;
696 #endif
697  if (rv)
698  {
700  }
701  }
702  if (!rv)
703  {
704  bfd_session_start (bfd_udp_main.bfd_main, bs);
705  }
706 
707  return rv;
708 }
709 
712  const ip46_address_t * local_addr,
713  const ip46_address_t * peer_addr,
714  u32 desired_min_tx_usec,
715  u32 required_min_rx_usec, u8 detect_mult)
716 {
717  bfd_session_t *bs = NULL;
718  vnet_api_error_t rv =
719  bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr,
720  &bs);
721  if (rv)
722  {
723  return rv;
724  }
725 
726  return bfd_session_set_params (bfd_udp_main.bfd_main, bs,
727  desired_min_tx_usec, required_min_rx_usec,
728  detect_mult);
729 }
730 
733  const ip46_address_t * local_addr,
734  const ip46_address_t * peer_addr)
735 {
736  bfd_session_t *bs = NULL;
737  vnet_api_error_t rv =
738  bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr,
739  &bs);
740  if (rv)
741  {
742  return rv;
743  }
745  return 0;
746 }
747 
750  const ip46_address_t * local_addr,
751  const ip46_address_t * peer_addr, u8 admin_up_down)
752 {
753  bfd_session_t *bs = NULL;
754  vnet_api_error_t rv =
755  bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr,
756  &bs);
757  if (rv)
758  {
759  return rv;
760  }
761  bfd_session_set_flags (bs, admin_up_down);
762  return 0;
763 }
764 
767  const ip46_address_t * local_addr,
768  const ip46_address_t * peer_addr,
769  u32 conf_key_id, u8 key_id, u8 is_delayed)
770 {
771 #if WITH_LIBSSL > 0
772  bfd_session_t *bs = NULL;
773  vnet_api_error_t rv =
774  bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr,
775  &bs);
776  if (rv)
777  {
778  return rv;
779  }
780  return bfd_auth_activate (bs, conf_key_id, key_id, is_delayed);
781 #else
782  vlib_log_err (bfd_udp_main->log_class,
783  "SSL missing, cannot activate BFD authentication");
784  return VNET_API_ERROR_BFD_NOTSUPP;
785 #endif
786 }
787 
790  const ip46_address_t * local_addr,
791  const ip46_address_t * peer_addr, u8 is_delayed)
792 {
793  bfd_session_t *bs = NULL;
794  vnet_api_error_t rv =
795  bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr,
796  &bs);
797  if (rv)
798  {
799  return rv;
800  }
801  return bfd_auth_deactivate (bs, is_delayed);
802 }
803 
804 typedef enum
805 {
811 
812 /* Packet counters - BFD control frames */
813 #define foreach_bfd_udp_error(F) \
814  F (NONE, "good bfd packets (processed)") \
815  F (BAD, "invalid bfd packets")
816 
817 #define F(sym, string) static char BFD_UDP_ERR_##sym##_STR[] = string;
819 #undef F
820 
821 static char *bfd_udp_error_strings[] = {
822 #define F(sym, string) BFD_UDP_ERR_##sym##_STR,
824 #undef F
825 };
826 
827 typedef enum
828 {
829 #define F(sym, str) BFD_UDP_ERROR_##sym,
831 #undef F
832  BFD_UDP_N_ERROR,
834 
835 /* Packet counters - BFD ECHO packets */
836 #define foreach_bfd_udp_echo_error(F) \
837  F (NONE, "good bfd echo packets (processed)") \
838  F (BAD, "invalid bfd echo packets")
839 
840 #define F(sym, string) static char BFD_UDP_ECHO_ERR_##sym##_STR[] = string;
842 #undef F
843 
844 static char *bfd_udp_echo_error_strings[] = {
845 #define F(sym, string) BFD_UDP_ECHO_ERR_##sym##_STR,
847 #undef F
848 };
849 
850 typedef enum
851 {
852 #define F(sym, str) BFD_UDP_ECHO_ERROR_##sym,
854 #undef F
855  BFD_UDP_ECHO_N_ERROR,
857 
858 static void
860  udp_header_t ** udp)
861 {
862  /* sanity check first */
863  const i32 start = vnet_buffer (b)->l3_hdr_offset;
864  if (start < 0 && start < sizeof (b->pre_data))
865  {
866  BFD_ERR ("Start of ip header is before pre_data, ignoring");
867  *ip4 = NULL;
868  *udp = NULL;
869  return;
870  }
871  *ip4 = (ip4_header_t *) (b->data + start);
872  if ((u8 *) * ip4 > (u8 *) vlib_buffer_get_current (b))
873  {
874  BFD_ERR ("Start of ip header is beyond current data, ignoring");
875  *ip4 = NULL;
876  *udp = NULL;
877  return;
878  }
879  *udp = (udp_header_t *) ((*ip4) + 1);
880 }
881 
882 static bfd_udp_error_t
884  const udp_header_t * udp, const bfd_session_t * bs)
885 {
886  const bfd_udp_session_t *bus = &bs->udp;
887  const bfd_udp_key_t *key = &bus->key;
888  if (ip4->src_address.as_u32 != key->peer_addr.ip4.as_u32)
889  {
890  BFD_ERR ("IPv4 src addr mismatch, got %U, expected %U",
892  key->peer_addr.ip4.as_u8);
893  return BFD_UDP_ERROR_BAD;
894  }
895  if (ip4->dst_address.as_u32 != key->local_addr.ip4.as_u32)
896  {
897  BFD_ERR ("IPv4 dst addr mismatch, got %U, expected %U",
899  key->local_addr.ip4.as_u8);
900  return BFD_UDP_ERROR_BAD;
901  }
902  const u8 expected_ttl = 255;
903  if (ip4->ttl != expected_ttl)
904  {
905  BFD_ERR ("IPv4 unexpected TTL value %u, expected %u", ip4->ttl,
906  expected_ttl);
907  return BFD_UDP_ERROR_BAD;
908  }
909  if (clib_net_to_host_u16 (udp->src_port) < 49152)
910  {
911  BFD_ERR ("Invalid UDP src port %u, out of range <49152,65535>",
912  udp->src_port);
913  }
914  return BFD_UDP_ERROR_NONE;
915 }
916 
917 typedef struct
918 {
920  bfd_pkt_t pkt;
922 
923 static void
925 {
926  bfd_consume_pkt (bfd_udp_main.bfd_main, &a->pkt, a->bs_idx);
927 }
928 
929 static void
930 bfd_rpc_update_session (u32 bs_idx, const bfd_pkt_t * pkt)
931 {
932  /* packet length was already verified to be correct by the caller */
933  const u32 data_size = sizeof (bfd_rpc_update_t) -
934  STRUCT_SIZE_OF (bfd_rpc_update_t, pkt) + pkt->head.length;
935  u8 data[data_size];
936  bfd_rpc_update_t *update = (bfd_rpc_update_t *) data;
937  update->bs_idx = bs_idx;
938  clib_memcpy (&update->pkt, pkt, pkt->head.length);
940 }
941 
942 static bfd_udp_error_t
944  vlib_buffer_t * b, bfd_session_t ** bs_out)
945 {
946  const bfd_pkt_t *pkt = vlib_buffer_get_current (b);
947  if (sizeof (*pkt) > b->current_length)
948  {
949  BFD_ERR
950  ("Payload size %d too small to hold bfd packet of minimum size %d",
951  b->current_length, sizeof (*pkt));
952  return BFD_UDP_ERROR_BAD;
953  }
954  ip4_header_t *ip4;
955  udp_header_t *udp;
956  bfd_udp4_find_headers (b, &ip4, &udp);
957  if (!ip4 || !udp)
958  {
959  BFD_ERR ("Couldn't find ip4 or udp header");
960  return BFD_UDP_ERROR_BAD;
961  }
962  const u32 udp_payload_length = udp->length - sizeof (*udp);
963  if (pkt->head.length > udp_payload_length)
964  {
965  BFD_ERR
966  ("BFD packet length is larger than udp payload length (%u > %u)",
967  pkt->head.length, udp_payload_length);
968  return BFD_UDP_ERROR_BAD;
969  }
970  if (!bfd_verify_pkt_common (pkt))
971  {
972  return BFD_UDP_ERROR_BAD;
973  }
974  bfd_session_t *bs = NULL;
975  if (pkt->your_disc)
976  {
977  BFD_DBG ("Looking up BFD session using discriminator %u",
978  pkt->your_disc);
979  bs = bfd_find_session_by_disc (bfd_udp_main.bfd_main, pkt->your_disc);
980  }
981  else
982  {
983  bfd_udp_key_t key;
984  memset (&key, 0, sizeof (key));
985  key.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
986  key.local_addr.ip4.as_u32 = ip4->dst_address.as_u32;
987  key.peer_addr.ip4.as_u32 = ip4->src_address.as_u32;
988  BFD_DBG ("Looking up BFD session using key (sw_if_index=%u, local=%U, "
989  "peer=%U)",
990  key.sw_if_index, format_ip4_address, key.local_addr.ip4.as_u8,
991  format_ip4_address, key.peer_addr.ip4.as_u8);
992  bs = bfd_lookup_session (&bfd_udp_main, &key);
993  }
994  if (!bs)
995  {
996  BFD_ERR ("BFD session lookup failed - no session matches BFD pkt");
997  return BFD_UDP_ERROR_BAD;
998  }
999  BFD_DBG ("BFD session found, bs_idx=%u", bs->bs_idx);
1000  if (!bfd_verify_pkt_auth (pkt, b->current_length, bs))
1001  {
1002  BFD_ERR ("Packet verification failed, dropping packet");
1003  return BFD_UDP_ERROR_BAD;
1004  }
1005  bfd_udp_error_t err;
1006  if (BFD_UDP_ERROR_NONE != (err = bfd_udp4_verify_transport (ip4, udp, bs)))
1007  {
1008  return err;
1009  }
1010  bfd_rpc_update_session (bs->bs_idx, pkt);
1011  *bs_out = bs;
1012  return BFD_UDP_ERROR_NONE;
1013 }
1014 
1015 static void
1017  udp_header_t ** udp)
1018 {
1019  /* sanity check first */
1020  const i32 start = vnet_buffer (b)->l3_hdr_offset;
1021  if (start < 0 && start < sizeof (b->pre_data))
1022  {
1023  BFD_ERR ("Start of ip header is before pre_data, ignoring");
1024  *ip6 = NULL;
1025  *udp = NULL;
1026  return;
1027  }
1028  *ip6 = (ip6_header_t *) (b->data + start);
1029  if ((u8 *) * ip6 > (u8 *) vlib_buffer_get_current (b))
1030  {
1031  BFD_ERR ("Start of ip header is beyond current data, ignoring");
1032  *ip6 = NULL;
1033  *udp = NULL;
1034  return;
1035  }
1036  if ((*ip6)->protocol != IP_PROTOCOL_UDP)
1037  {
1038  BFD_ERR ("Unexpected protocol in IPv6 header '%u', expected '%u' (== "
1039  "IP_PROTOCOL_UDP)", (*ip6)->protocol, IP_PROTOCOL_UDP);
1040  *ip6 = NULL;
1041  *udp = NULL;
1042  return;
1043  }
1044  *udp = (udp_header_t *) ((*ip6) + 1);
1045 }
1046 
1047 static bfd_udp_error_t
1049  const udp_header_t * udp, const bfd_session_t * bs)
1050 {
1051  const bfd_udp_session_t *bus = &bs->udp;
1052  const bfd_udp_key_t *key = &bus->key;
1053  if (ip6->src_address.as_u64[0] != key->peer_addr.ip6.as_u64[0] &&
1054  ip6->src_address.as_u64[1] != key->peer_addr.ip6.as_u64[1])
1055  {
1056  BFD_ERR ("IP src addr mismatch, got %U, expected %U",
1058  &key->peer_addr.ip6);
1059  return BFD_UDP_ERROR_BAD;
1060  }
1061  if (ip6->dst_address.as_u64[0] != key->local_addr.ip6.as_u64[0] &&
1062  ip6->dst_address.as_u64[1] != key->local_addr.ip6.as_u64[1])
1063  {
1064  BFD_ERR ("IP dst addr mismatch, got %U, expected %U",
1066  &key->local_addr.ip6);
1067  return BFD_UDP_ERROR_BAD;
1068  }
1069  const u8 expected_hop_limit = 255;
1070  if (ip6->hop_limit != expected_hop_limit)
1071  {
1072  BFD_ERR ("IPv6 unexpected hop-limit value %u, expected %u",
1073  ip6->hop_limit, expected_hop_limit);
1074  return BFD_UDP_ERROR_BAD;
1075  }
1076  if (clib_net_to_host_u16 (udp->src_port) < 49152)
1077  {
1078  BFD_ERR ("Invalid UDP src port %u, out of range <49152,65535>",
1079  udp->src_port);
1080  }
1081  return BFD_UDP_ERROR_NONE;
1082 }
1083 
1084 static bfd_udp_error_t
1086  vlib_buffer_t * b, bfd_session_t ** bs_out)
1087 {
1088  const bfd_pkt_t *pkt = vlib_buffer_get_current (b);
1089  if (sizeof (*pkt) > b->current_length)
1090  {
1091  BFD_ERR
1092  ("Payload size %d too small to hold bfd packet of minimum size %d",
1093  b->current_length, sizeof (*pkt));
1094  return BFD_UDP_ERROR_BAD;
1095  }
1096  ip6_header_t *ip6;
1097  udp_header_t *udp;
1098  bfd_udp6_find_headers (b, &ip6, &udp);
1099  if (!ip6 || !udp)
1100  {
1101  BFD_ERR ("Couldn't find ip6 or udp header");
1102  return BFD_UDP_ERROR_BAD;
1103  }
1104  const u32 udp_payload_length = udp->length - sizeof (*udp);
1105  if (pkt->head.length > udp_payload_length)
1106  {
1107  BFD_ERR
1108  ("BFD packet length is larger than udp payload length (%u > %u)",
1109  pkt->head.length, udp_payload_length);
1110  return BFD_UDP_ERROR_BAD;
1111  }
1112  if (!bfd_verify_pkt_common (pkt))
1113  {
1114  return BFD_UDP_ERROR_BAD;
1115  }
1116  bfd_session_t *bs = NULL;
1117  if (pkt->your_disc)
1118  {
1119  BFD_DBG ("Looking up BFD session using discriminator %u",
1120  pkt->your_disc);
1121  bs = bfd_find_session_by_disc (bfd_udp_main.bfd_main, pkt->your_disc);
1122  }
1123  else
1124  {
1125  bfd_udp_key_t key;
1126  memset (&key, 0, sizeof (key));
1127  key.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
1128  key.local_addr.ip6.as_u64[0] = ip6->dst_address.as_u64[0];
1129  key.local_addr.ip6.as_u64[1] = ip6->dst_address.as_u64[1];
1130  key.peer_addr.ip6.as_u64[0] = ip6->src_address.as_u64[0];
1131  key.peer_addr.ip6.as_u64[1] = ip6->src_address.as_u64[1];
1132  BFD_DBG ("Looking up BFD session using key (sw_if_index=%u, local=%U, "
1133  "peer=%U)",
1134  key.sw_if_index, format_ip6_address, &key.local_addr,
1135  format_ip6_address, &key.peer_addr);
1136  bs = bfd_lookup_session (&bfd_udp_main, &key);
1137  }
1138  if (!bs)
1139  {
1140  BFD_ERR ("BFD session lookup failed - no session matches BFD pkt");
1141  return BFD_UDP_ERROR_BAD;
1142  }
1143  BFD_DBG ("BFD session found, bs_idx=%u", bs->bs_idx);
1144  if (!bfd_verify_pkt_auth (pkt, b->current_length, bs))
1145  {
1146  BFD_ERR ("Packet verification failed, dropping packet");
1147  return BFD_UDP_ERROR_BAD;
1148  }
1149  bfd_udp_error_t err;
1150  if (BFD_UDP_ERROR_NONE != (err = bfd_udp6_verify_transport (ip6, udp, bs)))
1151  {
1152  return err;
1153  }
1154  bfd_rpc_update_session (bs->bs_idx, pkt);
1155  *bs_out = bs;
1156  return BFD_UDP_ERROR_NONE;
1157 }
1158 
1159 /*
1160  * Process a frame of bfd packets
1161  * Expect 1 packet / frame
1162  */
1163 static uword
1165  vlib_frame_t * f, int is_ipv6)
1166 {
1167  u32 n_left_from, *from;
1168  bfd_input_trace_t *t0;
1169 
1170  from = vlib_frame_vector_args (f); /* array of buffer indices */
1171  n_left_from = f->n_vectors; /* number of buffer indices */
1172 
1173  while (n_left_from > 0)
1174  {
1175  u32 bi0;
1176  vlib_buffer_t *b0;
1177  u32 next0, error0;
1178 
1179  bi0 = from[0];
1180  b0 = vlib_get_buffer (vm, bi0);
1181 
1182  bfd_session_t *bs = NULL;
1183 
1184  /* If this pkt is traced, snapshot the data */
1185  if (b0->flags & VLIB_BUFFER_IS_TRACED)
1186  {
1187  int len;
1188  t0 = vlib_add_trace (vm, rt, b0, sizeof (*t0));
1189  len = (b0->current_length < sizeof (t0->data)) ? b0->current_length
1190  : sizeof (t0->data);
1191  t0->len = len;
1192  clib_memcpy (t0->data, vlib_buffer_get_current (b0), len);
1193  }
1194 
1195  /* scan this bfd pkt. error0 is the counter index to bmp */
1196  if (is_ipv6)
1197  {
1198  error0 = bfd_udp6_scan (vm, rt, b0, &bs);
1199  }
1200  else
1201  {
1202  error0 = bfd_udp4_scan (vm, rt, b0, &bs);
1203  }
1204  b0->error = rt->errors[error0];
1205 
1206  next0 = BFD_UDP_INPUT_NEXT_NORMAL;
1207  if (BFD_UDP_ERROR_NONE == error0)
1208  {
1209  /*
1210  * if everything went fine, check for poll bit, if present, re-use
1211  * the buffer and based on (now updated) session parameters, send
1212  * the final packet back
1213  */
1214  const bfd_pkt_t *pkt = vlib_buffer_get_current (b0);
1215  if (bfd_pkt_get_poll (pkt))
1216  {
1217  b0->current_data = 0;
1218  b0->current_length = 0;
1219  memset (vnet_buffer (b0), 0, sizeof (*vnet_buffer (b0)));
1220  bfd_init_final_control_frame (vm, b0, bfd_udp_main.bfd_main, bs,
1221  0);
1222  if (is_ipv6)
1223  {
1225  b0->error, 1);
1226  }
1227  else
1228  {
1230  b0->error, 1);
1231  }
1232  const bfd_udp_session_t *bus = &bs->udp;
1233  ip_adjacency_t *adj = adj_get (bus->adj_index);
1234  switch (adj->lookup_next_index)
1235  {
1236  case IP_LOOKUP_NEXT_ARP:
1238  break;
1241  break;
1242  default:
1243  /* drop */
1244  break;
1245  }
1246  }
1247  }
1248  vlib_set_next_frame_buffer (vm, rt, next0, bi0);
1249 
1250  from += 1;
1251  n_left_from -= 1;
1252  }
1253 
1254  return f->n_vectors;
1255 }
1256 
1257 static uword
1259 {
1260  return bfd_udp_input (vm, rt, f, 0);
1261 }
1262 
1263 /*
1264  * bfd input graph node declaration
1265  */
1266 /* *INDENT-OFF* */
1268  .function = bfd_udp4_input,
1269  .name = "bfd-udp4-input",
1270  .vector_size = sizeof (u32),
1271  .type = VLIB_NODE_TYPE_INTERNAL,
1272 
1273  .n_errors = BFD_UDP_N_ERROR,
1274  .error_strings = bfd_udp_error_strings,
1275 
1276  .format_trace = bfd_input_format_trace,
1277 
1278  .n_next_nodes = BFD_UDP_INPUT_N_NEXT,
1279  .next_nodes =
1280  {
1281  [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop",
1282  [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip4-arp",
1283  [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip4-lookup",
1284  },
1285 };
1286 /* *INDENT-ON* */
1287 
1288 static uword
1290 {
1291  return bfd_udp_input (vm, rt, f, 1);
1292 }
1293 
1294 /* *INDENT-OFF* */
1296  .function = bfd_udp6_input,
1297  .name = "bfd-udp6-input",
1298  .vector_size = sizeof (u32),
1299  .type = VLIB_NODE_TYPE_INTERNAL,
1300 
1301  .n_errors = BFD_UDP_N_ERROR,
1302  .error_strings = bfd_udp_error_strings,
1303 
1304  .format_trace = bfd_input_format_trace,
1305 
1306  .n_next_nodes = BFD_UDP_INPUT_N_NEXT,
1307  .next_nodes =
1308  {
1309  [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop",
1310  [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip6-discover-neighbor",
1311  [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip6-lookup",
1312  },
1313 };
1314 /* *INDENT-ON* */
1315 
1316 /*
1317  * Process a frame of bfd echo packets
1318  * Expect 1 packet / frame
1319  */
1320 static uword
1322  vlib_frame_t * f, int is_ipv6)
1323 {
1324  u32 n_left_from, *from;
1325  bfd_input_trace_t *t0;
1326 
1327  from = vlib_frame_vector_args (f); /* array of buffer indices */
1328  n_left_from = f->n_vectors; /* number of buffer indices */
1329 
1330  while (n_left_from > 0)
1331  {
1332  u32 bi0;
1333  vlib_buffer_t *b0;
1334  u32 next0;
1335 
1336  bi0 = from[0];
1337  b0 = vlib_get_buffer (vm, bi0);
1338 
1339  /* If this pkt is traced, snapshot the data */
1340  if (b0->flags & VLIB_BUFFER_IS_TRACED)
1341  {
1342  int len;
1343  t0 = vlib_add_trace (vm, rt, b0, sizeof (*t0));
1344  len = (b0->current_length < sizeof (t0->data)) ? b0->current_length
1345  : sizeof (t0->data);
1346  t0->len = len;
1347  clib_memcpy (t0->data, vlib_buffer_get_current (b0), len);
1348  }
1349 
1350  if (bfd_consume_echo_pkt (bfd_udp_main.bfd_main, b0))
1351  {
1352  b0->error = rt->errors[BFD_UDP_ERROR_NONE];
1353  next0 = BFD_UDP_INPUT_NEXT_NORMAL;
1354  }
1355  else
1356  {
1357  /* loop back the packet */
1358  b0->error = rt->errors[BFD_UDP_ERROR_NONE];
1359  if (is_ipv6)
1360  {
1362  b0->error, 1);
1363  }
1364  else
1365  {
1367  b0->error, 1);
1368  }
1370  }
1371 
1372  vlib_set_next_frame_buffer (vm, rt, next0, bi0);
1373 
1374  from += 1;
1375  n_left_from -= 1;
1376  }
1377 
1378  return f->n_vectors;
1379 }
1380 
1381 static uword
1383  vlib_frame_t * f)
1384 {
1385  return bfd_udp_echo_input (vm, rt, f, 0);
1386 }
1387 
1388 u8 *
1389 bfd_echo_input_format_trace (u8 * s, va_list * args)
1390 {
1391  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1392  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1393  const bfd_udp_echo_input_trace_t *t =
1394  va_arg (*args, bfd_udp_echo_input_trace_t *);
1395  if (t->len > STRUCT_SIZE_OF (bfd_pkt_t, head))
1396  {
1397  s = format (s, "BFD ECHO:\n");
1398  s = format (s, " data: %U", format_hexdump, t->data, t->len);
1399  }
1400 
1401  return s;
1402 }
1403 
1404 /*
1405  * bfd input graph node declaration
1406  */
1407 /* *INDENT-OFF* */
1409  .function = bfd_udp_echo4_input,
1410  .name = "bfd-udp-echo4-input",
1411  .vector_size = sizeof (u32),
1412  .type = VLIB_NODE_TYPE_INTERNAL,
1413 
1414  .n_errors = BFD_UDP_ECHO_N_ERROR,
1415  .error_strings = bfd_udp_error_strings,
1416 
1417  .format_trace = bfd_echo_input_format_trace,
1418 
1419  .n_next_nodes = BFD_UDP_INPUT_N_NEXT,
1420  .next_nodes =
1421  {
1422  [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop",
1423  [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip4-arp",
1424  [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip4-lookup",
1425  },
1426 };
1427 /* *INDENT-ON* */
1428 
1429 static uword
1431  vlib_frame_t * f)
1432 {
1433  return bfd_udp_echo_input (vm, rt, f, 1);
1434 }
1435 
1436 /* *INDENT-OFF* */
1438  .function = bfd_udp_echo6_input,
1439  .name = "bfd-udp-echo6-input",
1440  .vector_size = sizeof (u32),
1441  .type = VLIB_NODE_TYPE_INTERNAL,
1442 
1443  .n_errors = BFD_UDP_ECHO_N_ERROR,
1444  .error_strings = bfd_udp_echo_error_strings,
1445 
1446  .format_trace = bfd_echo_input_format_trace,
1447 
1448  .n_next_nodes = BFD_UDP_INPUT_N_NEXT,
1449  .next_nodes =
1450  {
1451  [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop",
1452  [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip6-discover-neighbor",
1453  [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip6-lookup",
1454  },
1455 };
1456 
1457 /* *INDENT-ON* */
1458 
1459 static clib_error_t *
1460 bfd_udp_sw_if_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_create)
1461 {
1462  bfd_session_t **to_be_freed = NULL;
1463  bfd_udp_main_t *bum = &bfd_udp_main;
1464  BFD_DBG ("sw_if_add_del called, sw_if_index=%u, is_create=%u", sw_if_index,
1465  is_create);
1466  if (!is_create)
1467  {
1468  bfd_session_t *bs;
1469  pool_foreach (bs, bfd_udp_main.bfd_main->sessions,
1470  {
1471  if (bs->transport != BFD_TRANSPORT_UDP4 &&
1472  bs->transport != BFD_TRANSPORT_UDP6)
1473  {
1474  continue;}
1475  if (bs->udp.key.sw_if_index != sw_if_index)
1476  {
1477  continue;}
1478  vec_add1 (to_be_freed, bs);}
1479  );
1480  }
1481  bfd_session_t **bs;
1482  vec_foreach (bs, to_be_freed)
1483  {
1484  vlib_log_notice (bum->log_class,
1485  "removal of sw_if_index=%u forces removal of bfd session "
1486  "with bs_idx=%u", sw_if_index, (*bs)->bs_idx);
1487  bfd_session_set_flags (*bs, 0);
1489  }
1490  return 0;
1491 }
1492 
1494 
1495 /*
1496  * setup function
1497  */
1498 static clib_error_t *
1500 {
1501  mhash_init (&bfd_udp_main.bfd_session_idx_by_bfd_key, sizeof (uword),
1502  sizeof (bfd_udp_key_t));
1503  bfd_udp_main.bfd_main = &bfd_main;
1504  bfd_udp_main.vnet_main = vnet_get_main ();
1505  udp_register_dst_port (vm, UDP_DST_PORT_bfd4, bfd_udp4_input_node.index, 1);
1506  udp_register_dst_port (vm, UDP_DST_PORT_bfd6, bfd_udp6_input_node.index, 0);
1507  udp_register_dst_port (vm, UDP_DST_PORT_bfd_echo4,
1508  bfd_udp_echo4_input_node.index, 1);
1509  udp_register_dst_port (vm, UDP_DST_PORT_bfd_echo6,
1510  bfd_udp_echo6_input_node.index, 0);
1511  vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip4-arp");
1512  ASSERT (node);
1513  bfd_udp_main.ip4_arp_idx = node->index;
1514  node = vlib_get_node_by_name (vm, (u8 *) "ip6-discover-neighbor");
1515  ASSERT (node);
1516  bfd_udp_main.ip6_ndp_idx = node->index;
1517  node = vlib_get_node_by_name (vm, (u8 *) "ip4-rewrite");
1518  ASSERT (node);
1519  bfd_udp_main.ip4_rewrite_idx = node->index;
1520  node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite");
1521  ASSERT (node);
1522  bfd_udp_main.ip6_rewrite_idx = node->index;
1523 
1524  bfd_udp_main.log_class = vlib_log_register_class ("bfd", "udp");
1525  vlib_log_debug (bfd_udp_main.log_class, "initialized");
1526  return 0;
1527 }
1528 
1530 
1531 /*
1532  * fd.io coding-style-patch-verification: ON
1533  *
1534  * Local Variables:
1535  * eval: (c-set-style "gnu")
1536  * End:
1537  */
vlib_log_class_t vlib_log_register_class(char *class, char *subclass)
Definition: log.c:221
static clib_error_t * bfd_udp_init(vlib_main_t *vm)
Definition: bfd_udp.c:1499
vnet_api_error_t bfd_udp_auth_activate(u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, u32 conf_key_id, u8 key_id, u8 is_delayed)
activate authentication for existing session
Definition: bfd_udp.c:766
#define foreach_ip_interface_address(lm, a, sw_if_index, loop, body)
Definition: lookup.h:179
static uword bfd_udp_input(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f, int is_ipv6)
Definition: bfd_udp.c:1164
Definition: mhash.h:46
bfd_session_t * bfd_get_session(bfd_main_t *bm, bfd_transport_e t)
Definition: bfd_main.c:1187
static char * bfd_udp_echo_error_strings[]
Definition: bfd_udp.c:844
vnet_api_error_t
Definition: api_errno.h:147
u32 vlib_log_class_t
Definition: log.h:21
static vnet_api_error_t bfd_api_verify_common(u32 sw_if_index, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult, const ip46_address_t *local_addr, const ip46_address_t *peer_addr)
Definition: bfd_udp.c:632
vnet_main_t * vnet_main
Definition: bfd_udp.c:49
bfd_udp_echo_error_t
Definition: bfd_udp.c:850
void bfd_consume_pkt(bfd_main_t *bm, const bfd_pkt_t *pkt, u32 bs_idx)
Definition: bfd_main.c:1621
#define CLIB_UNUSED(x)
Definition: clib.h:79
bfd udp echo packet trace capture
Definition: bfd_udp.h:53
a
Definition: bitmap.h:538
ip4_address_t src_address
Definition: ip4_packet.h:169
static uword bfd_udp_echo6_input(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Definition: bfd_udp.c:1430
bfd_main_t bfd_main
Definition: bfd_main.c:2096
static void vlib_set_next_frame_buffer(vlib_main_t *vm, vlib_node_runtime_t *node, u32 next_index, u32 buffer_index)
Definition: node_funcs.h:397
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
#define BFD_ERR(...)
Definition: bfd_debug.h:75
u64 as_u64[2]
Definition: ip6_packet.h:51
bfd_main_t * bfd_main
Definition: bfd_udp.c:44
bfd_session_t * bfd_find_session_by_disc(bfd_main_t *bm, u32 disc)
Definition: bfd_main.c:1244
Definitions for all things IP (v4|v6) unicast and multicast lookup related.
#define NULL
Definition: clib.h:55
uword mhash_unset(mhash_t *h, void *key, uword *old_value)
Definition: mhash.c:353
u32 index
Definition: node.h:273
IP unicast adjacency.
Definition: adj.h:175
int bfd_verify_pkt_common(const bfd_pkt_t *pkt)
verify bfd packet - common checks
Definition: bfd_main.c:1262
u32 ip4_arp_idx
Definition: bfd_udp.c:55
This packet is to be rewritten and forwarded to the next processing node.
Definition: adj.h:73
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:523
static vlib_node_registration_t bfd_udp4_input_node
(constructor) VLIB_REGISTER_NODE (bfd_udp4_input_node)
Definition: bfd_udp.c:66
void bfd_put_session(bfd_main_t *bm, bfd_session_t *bs)
Definition: bfd_main.c:1216
format_function_t format_ip46_address
Definition: format.h:61
ip_lookup_main_t lookup_main
Definition: ip4.h:97
static vlib_node_registration_t bfd_udp6_input_node
(constructor) VLIB_REGISTER_NODE (bfd_udp6_input_node)
Definition: bfd_udp.c:67
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
static bfd_udp_error_t bfd_udp6_scan(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_buffer_t *b, bfd_session_t **bs_out)
Definition: bfd_udp.c:1085
#define foreach_bfd_udp_error(F)
Definition: bfd_udp.c:813
void bfd_init_final_control_frame(vlib_main_t *vm, vlib_buffer_t *b, bfd_main_t *bm, bfd_session_t *bs, int is_local)
Definition: bfd_main.c:904
VNET_SW_INTERFACE_ADD_DEL_FUNCTION(bfd_udp_sw_if_add_del)
static uword bfd_udp4_input(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Definition: bfd_udp.c:1258
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:451
static uword vlib_buffer_length_in_chain(vlib_main_t *vm, vlib_buffer_t *b)
Get length in bytes of the buffer chain.
Definition: buffer_funcs.h:250
u32 echo_source_sw_if_index
Definition: bfd_udp.c:53
vhost_vring_addr_t addr
Definition: vhost_user.h:116
static vnet_api_error_t bfd_udp_validate_api_input(u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr)
Definition: bfd_udp.c:523
ip6_address_t src_address
Definition: ip6_packet.h:347
unsigned char u8
Definition: types.h:56
static uword bfd_udp_echo_input(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f, int is_ipv6)
Definition: bfd_udp.c:1321
bfd_udp_error_t
Definition: bfd_udp.c:827
int bfd_add_udp4_transport(vlib_main_t *vm, u32 bi, const bfd_session_t *bs, int is_echo)
Definition: bfd_udp.c:244
#define foreach_bfd_udp_echo_error(F)
Definition: bfd_udp.c:836
void bfd_udp_get_echo_source(int *is_set, u32 *sw_if_index, int *have_usable_ip4, ip4_address_t *ip4, int *have_usable_ip6, ip6_address_t *ip6)
get echo source information - used by CLI
Definition: bfd_udp.c:226
vnet_api_error_t bfd_auth_deactivate(bfd_session_t *bs, u8 is_delayed)
Definition: bfd_main.c:1896
mhash_t bfd_session_idx_by_bfd_key
Definition: bfd_udp.c:47
format_function_t format_ip4_address
Definition: format.h:81
static ip_adjacency_t * adj_get(adj_index_t adj_index)
Get a pointer to an adjacency object from its index.
Definition: adj.h:370
vnet_api_error_t bfd_udp_del_echo_source(u32 sw_if_index)
Definition: bfd_udp.c:88
static char * bfd_udp_error_strings[]
Definition: bfd_udp.c:821
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:104
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:443
static void bfd_udp6_find_headers(vlib_buffer_t *b, ip6_header_t **ip6, udp_header_t **udp)
Definition: bfd_udp.c:1016
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:156
vnet_api_error_t bfd_udp_mod_session(u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult)
modify existing session
Definition: bfd_udp.c:711
ip4_address_t dst_address
Definition: ip4_packet.h:169
static void bfd_udp4_find_headers(vlib_buffer_t *b, ip4_header_t **ip4, udp_header_t **udp)
Definition: bfd_udp.c:859
static bfd_session_t * bfd_lookup_session(bfd_udp_main_t *bum, const bfd_udp_key_t *key)
Definition: bfd_udp.c:436
int bfd_transport_udp4(vlib_main_t *vm, u32 bi, const struct bfd_session_s *bs)
transport packet over udpv4
Definition: bfd_udp.c:412
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:182
UDP transport specific data embedded in bfd_session&#39;s union.
Definition: bfd_udp.h:44
void vl_api_rpc_call_main_thread(void *fp, u8 *data, u32 data_length)
Definition: vlib_api.c:638
u8 pre_data[VLIB_BUFFER_PRE_DATA_SIZE]
Space for inserting data before buffer start.
Definition: buffer.h:164
void adj_unlock(adj_index_t adj_index)
Release a reference counting lock on the adjacency.
Definition: adj.c:240
unsigned int u32
Definition: types.h:88
static void bfd_rpc_update_session_cb(const bfd_rpc_update_t *a)
Definition: bfd_udp.c:924
#define vlib_log_debug(...)
Definition: log.h:54
bfd_session_t * bfd_find_session_by_idx(bfd_main_t *bm, uword bs_idx)
Definition: bfd_main.c:1234
static vnet_api_error_t bfd_udp_find_session_by_api_input(u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, bfd_session_t **bs_out)
Definition: bfd_udp.c:601
bfd_session_t * sessions
pool of bfd sessions context data
Definition: bfd_main.h:264
bfd_udp_key_t key
key identifying this session
Definition: bfd_udp.h:47
bfd_transport_e transport
transport type for this session
Definition: bfd_main.h:232
bfd_pkt_t pkt
Definition: bfd_udp.c:920
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:108
vnet_api_error_t bfd_udp_set_echo_source(u32 sw_if_index)
set echo-source interface
Definition: bfd_udp.c:74
unsigned short u16
Definition: types.h:57
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:191
static vlib_node_registration_t bfd_udp_echo4_input_node
(constructor) VLIB_REGISTER_NODE (bfd_udp_echo4_input_node)
Definition: bfd_udp.c:68
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:202
BFD global declarations.
u8 * bfd_echo_input_format_trace(u8 *s, va_list *args)
Definition: bfd_udp.c:1389
vnet_api_error_t bfd_udp_add_session(u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult, u8 is_authenticated, u32 conf_key_id, u8 bfd_key_id)
create a new bfd session
Definition: bfd_udp.c:668
static uword mhash_set(mhash_t *h, void *key, uword new_value, uword *old_value)
Definition: mhash.h:117
static bfd_udp_error_t bfd_udp4_scan(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_buffer_t *b, bfd_session_t **bs_out)
Definition: bfd_udp.c:943
int bfd_transport_udp6(vlib_main_t *vm, u32 bi, const struct bfd_session_s *bs)
transport packet over udpv6
Definition: bfd_udp.c:424
bfd_udp_session_t udp
Definition: bfd_main.h:237
u32 ip6_rewrite_idx
Definition: bfd_udp.c:61
int bfd_add_udp6_transport(vlib_main_t *vm, u32 bi, const bfd_session_t *bs, int is_echo)
Definition: bfd_udp.c:299
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:135
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1168
void bfd_session_start(bfd_main_t *bm, bfd_session_t *bs)
Definition: bfd_main.c:404
#define ip46_address_is_ip4(ip46)
Definition: ip6_packet.h:81
int bfd_udp_get_echo_src_ip6(ip6_address_t *addr)
Definition: bfd_udp.c:197
This packet matches an "incomplete adjacency" and packets need to be passed to ARP to find rewrite st...
Definition: adj.h:63
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:153
u32 ip4_rewrite_idx
Definition: bfd_udp.c:59
#define F(sym, string)
Definition: bfd_udp.c:852
void mhash_init(mhash_t *h, uword n_value_bytes, uword n_key_bytes)
Definition: mhash.c:168
u16 n_vectors
Definition: node.h:380
bfd_udp_input_next_t
Definition: bfd_udp.c:804
format_function_t format_ip6_address
Definition: format.h:99
vlib_main_t * vm
Definition: buffer.c:294
vlib_log_class_t log_class
Definition: bfd_udp.c:63
static void bfd_create_frame_to_next_node(vlib_main_t *vm, u32 bi, u32 next_node)
Definition: bfd_udp.c:366
static uword bfd_udp6_input(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Definition: bfd_udp.c:1289
u8 * format_bfd_session(u8 *s, va_list *args)
Definition: bfd_main.c:1789
#define clib_memcpy(a, b, c)
Definition: string.h:75
static vnet_sw_interface_t * vnet_get_sw_interface_safe(vnet_main_t *vnm, u32 sw_if_index)
u8 * format_hexdump(u8 *s, va_list *va)
Definition: std-formats.c:281
vnet_api_error_t bfd_auth_activate(bfd_session_t *bs, u32 conf_key_id, u8 bfd_key_id, u8 is_delayed)
Definition: bfd_main.c:1847
BFD global declarations.
vlib_node_t * vlib_get_node_by_name(vlib_main_t *vm, u8 *name)
Definition: node.c:45
static clib_error_t * bfd_udp_sw_if_add_del(vnet_main_t *vnm, u32 sw_if_index, u32 is_create)
Definition: bfd_udp.c:1460
u8 * bfd_input_format_trace(u8 *s, va_list *args)
Definition: bfd_main.c:445
#define BFD_DBG(...)
Definition: bfd_debug.h:74
int bfd_udp_get_echo_src_ip4(ip4_address_t *addr)
Definition: bfd_udp.c:163
u16 ip6_tcp_udp_icmp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0, ip6_header_t *ip0, int *bogus_lengthp)
Definition: ip6_forward.c:910
signed int i32
Definition: types.h:81
vlib buffer structure definition and a few select access methods.
#define VNET_SW_INTERFACE_FLAG_ADMIN_UP
Definition: interface.h:661
static bfd_udp_error_t bfd_udp6_verify_transport(const ip6_header_t *ip6, const udp_header_t *udp, const bfd_session_t *bs)
Definition: bfd_udp.c:1048
#define ASSERT(truth)
int echo_source_is_set
Definition: bfd_udp.c:51
static uword * mhash_get(mhash_t *h, const void *key)
Definition: mhash.h:110
ip6_main_t ip6_main
Definition: ip6_forward.c:2574
ip_lookup_main_t lookup_main
Definition: ip6.h:161
int bfd_udp_is_echo_available(bfd_transport_e transport)
check if the bfd udp layer is echo-capable at this time
Definition: bfd_udp.c:96
IPv4 main type.
Definition: ip4.h:95
static bfd_udp_error_t bfd_udp4_verify_transport(const ip4_header_t *ip4, const udp_header_t *udp, const bfd_session_t *bs)
Definition: bfd_udp.c:883
adj_index_t adj_index
adjacency index returned from adj lock call
Definition: bfd_udp.h:49
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:215
static vlib_node_registration_t bfd_udp_echo6_input_node
(constructor) VLIB_REGISTER_NODE (bfd_udp_echo6_input_node)
Definition: bfd_udp.c:69
bfd_udp_main_t bfd_udp_main
Definition: bfd_udp.c:71
static u16 bfd_udp_bs_idx_to_sport(u32 bs_idx)
Definition: bfd_udp.c:149
vnet_api_error_t bfd_udp_session_set_flags(u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, u8 admin_up_down)
set session admin down/up
Definition: bfd_udp.c:749
int bfd_consume_echo_pkt(bfd_main_t *bm, vlib_buffer_t *b)
Definition: bfd_main.c:1753
vnet_api_error_t bfd_session_set_params(bfd_main_t *bm, bfd_session_t *bs, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult)
Definition: bfd_main.c:1938
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
struct _vlib_node_registration vlib_node_registration_t
static vnet_api_error_t bfd_udp_add_session_internal(bfd_udp_main_t *bum, u32 sw_if_index, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, bfd_session_t **bs_out)
Definition: bfd_udp.c:460
Definition: defs.h:47
BFD UDP transport layer declarations.
BFD API declarations.
ip_lookup_next_t lookup_next_index
Next hop after ip4-lookup.
Definition: adj.h:190
int bfd_udp_calc_next_node(const struct bfd_session_s *bs, u32 *next_node)
Definition: bfd_udp.c:376
static void bfd_udp_del_session_internal(bfd_session_t *bs)
Definition: bfd_udp.c:658
#define vlib_log_info(...)
Definition: log.h:53
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:267
vnet_api_error_t bfd_udp_del_session(u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr)
delete existing session
Definition: bfd_udp.c:732
u8 bfd_pkt_get_poll(const bfd_pkt_t *pkt)
Definition: bfd_protocol.c:60
u32 bs_idx
index in bfd_main.sessions pool
Definition: bfd_main.h:87
#define vnet_buffer(b)
Definition: buffer.h:360
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:832
static void bfd_udp_key_init(bfd_udp_key_t *key, u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr)
Definition: bfd_udp.c:447
#define STRUCT_SIZE_OF(t, f)
Definition: clib.h:64
u8 data[0]
Packet data.
Definition: buffer.h:172
adj_index_t adj_nbr_add_or_lock(fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
Neighbour Adjacency sub-type.
Definition: adj_nbr.c:214
#define vec_foreach(var, vec)
Vector iterator.
u32 ip6_ndp_idx
Definition: bfd_udp.c:57
#define vlib_log_err(...)
Definition: log.h:50
bfd packet trace capture
Definition: bfd_main.h:324
int bfd_verify_pkt_auth(const bfd_pkt_t *pkt, u16 pkt_size, bfd_session_t *bs)
verify bfd packet - authentication
Definition: bfd_main.c:1543
void udp_register_dst_port(vlib_main_t *vm, udp_dst_port_t dst_port, u32 node_index, u8 is_ip4)
Definition: udp_local.c:492
static void bfd_rpc_update_session(u32 bs_idx, const bfd_pkt_t *pkt)
Definition: bfd_udp.c:930
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:111
vnet_api_error_t bfd_udp_auth_deactivate(u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, u8 is_delayed)
deactivate authentication for existing session
Definition: bfd_udp.c:789
static uword bfd_udp_echo4_input(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Definition: bfd_udp.c:1382
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
static u16 ip4_header_checksum(ip4_header_t *i)
Definition: ip4_packet.h:246
Definition: defs.h:46
bfd_transport_e
Definition: bfd_api.h:30
ip6_address_t dst_address
Definition: ip6_packet.h:347
void bfd_session_set_flags(bfd_session_t *bs, u8 admin_up_down)
Definition: bfd_main.c:418
#define vlib_log_notice(...)
Definition: log.h:52