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Vector Packet Processing
interface.c
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1 /*
2  * gre_interface.c: gre interfaces
3  *
4  * Copyright (c) 2012 Cisco and/or its affiliates.
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #include <vnet/vnet.h>
19 #include <vnet/pg/pg.h>
20 #include <vnet/gre/gre.h>
21 #include <vnet/ip/format.h>
22 #include <vnet/fib/ip4_fib.h>
23 #include <vnet/fib/ip6_fib.h>
24 #include <vnet/adj/adj_midchain.h>
25 #include <vnet/adj/adj_nbr.h>
26 #include <vnet/mpls/mpls.h>
27 #include <vnet/l2/l2_input.h>
28 #include <vnet/teib/teib.h>
29 
30 u8 *
31 format_gre_tunnel_type (u8 * s, va_list * args)
32 {
33  gre_tunnel_type_t type = va_arg (*args, int);
34 
35  switch (type)
36  {
37 #define _(n, v) case GRE_TUNNEL_TYPE_##n: \
38  s = format (s, "%s", v); \
39  break;
41 #undef _
42  }
43 
44  return (s);
45 }
46 
47 static u8 *
48 format_gre_tunnel (u8 * s, va_list * args)
49 {
50  gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *);
51 
52  s = format (s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ",
57 
58  s = format (s, "payload %U ", format_gre_tunnel_type, t->type);
59  s = format (s, "%U ", format_tunnel_mode, t->mode);
60 
61  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
62  s = format (s, "session %d ", t->session_id);
63 
64  if (t->type != GRE_TUNNEL_TYPE_L3)
65  s = format (s, "l2-adj-idx %d ", t->l2_adj_index);
66 
67  return s;
68 }
69 
70 static gre_tunnel_t *
72  u32 outer_fib_index, gre_tunnel_key_t * key)
73 {
75  uword *p;
76 
77  if (!a->is_ipv6)
78  {
79  gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index,
80  a->type, a->mode, a->session_id, &key->gtk_v4);
81  p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
82  }
83  else
84  {
85  gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index,
86  a->type, a->mode, a->session_id, &key->gtk_v6);
87  p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6);
88  }
89 
90  if (NULL == p)
91  return (NULL);
92 
93  return (pool_elt_at_index (gm->tunnels, p[0]));
94 }
95 
96 static void
98 {
100 
102  {
104  }
105  else
106  {
108  }
109 }
110 
111 static void
113 {
114  gre_main_t *gm = &gre_main;
115 
117  {
119  }
120  else
121  {
123  }
124 }
125 
126 /**
127  * gre_tunnel_stack
128  *
129  * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
130  */
131 void
133 {
134  gre_main_t *gm = &gre_main;
135  ip_adjacency_t *adj;
136  gre_tunnel_t *gt;
138 
139  adj = adj_get (ai);
140  sw_if_index = adj->rewrite_header.sw_if_index;
141 
142  if ((vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index) ||
143  (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
144  return;
145 
146  gt = pool_elt_at_index (gm->tunnels,
147  gm->tunnel_index_by_sw_if_index[sw_if_index]);
148 
151  {
153  }
154  else
155  {
157  }
158 }
159 
160 /**
161  * @brief Call back when restacking all adjacencies on a GRE interface
162  */
163 static adj_walk_rc_t
165 {
166  gre_tunnel_stack (ai);
167 
168  return (ADJ_WALK_RC_CONTINUE);
169 }
170 
171 static void
173 {
175 
176  /*
177  * walk all the adjacencies on th GRE interface and restack them
178  */
180  {
181  adj_nbr_walk (gt->sw_if_index, proto, gre_adj_walk_cb, NULL);
182  }
183 }
184 
185 static void
187  const teib_entry_t * ne, gre_tunnel_key_t * key)
188 {
189  const fib_prefix_t *nh;
190 
191  nh = teib_entry_get_nh (ne);
192 
193  /* construct the key using mode P2P so it can be found in the DP */
194  if (FIB_PROTOCOL_IP4 == nh->fp_proto)
195  gre_mk_key4 (t->tunnel_src.ip4,
196  nh->fp_addr.ip4,
198  t->type, TUNNEL_MODE_P2P, 0, &key->gtk_v4);
199  else
200  gre_mk_key6 (&t->tunnel_src.ip6,
201  &nh->fp_addr.ip6,
203  t->type, TUNNEL_MODE_P2P, 0, &key->gtk_v6);
204 }
205 
206 /**
207  * An NHRP entry has been added
208  */
209 static void
211 {
212  gre_main_t *gm = &gre_main;
213  const ip46_address_t *nh;
215  gre_tunnel_t *t;
217  u32 t_idx;
218 
219  sw_if_index = teib_entry_get_sw_if_index (ne);
220  if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
221  return;
222 
224 
225  if (INDEX_INVALID == t_idx)
226  return;
227 
228  /* entry has been added on an interface for which there is a GRE tunnel */
229  t = pool_elt_at_index (gm->tunnels, t_idx);
230 
231  if (t->mode != TUNNEL_MODE_MP)
232  return;
233 
234  /* the next-hop (underlay) of the NHRP entry will form part of the key for
235  * ingress lookup to match packets to this interface */
236  gre_teib_mk_key (t, ne, &key);
237  gre_tunnel_db_add (t, &key);
238 
239  /* update the rewrites for each of the adjacencies for this peer (overlay)
240  * using the next-hop (underlay) */
241  mgre_walk_ctx_t ctx = {
242  .t = t,
243  .ne = ne
244  };
245  nh = teib_entry_get_peer (ne);
247  (ip46_address_is_ip4 (nh) ?
250 }
251 
252 static void
254 {
255  gre_main_t *gm = &gre_main;
256  const ip46_address_t *nh;
258  gre_tunnel_t *t;
260  u32 t_idx;
261 
262  sw_if_index = teib_entry_get_sw_if_index (ne);
263  if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
264  return;
265 
267 
268  if (INDEX_INVALID == t_idx)
269  return;
270 
271  t = pool_elt_at_index (gm->tunnels, t_idx);
272 
273  /* remove the next-hop as an ingress lookup key */
274  gre_teib_mk_key (t, ne, &key);
275  gre_tunnel_db_remove (t, &key);
276 
277  nh = teib_entry_get_peer (ne);
278 
279  /* make all the adjacencies incomplete */
281  (ip46_address_is_ip4 (nh) ?
284 }
285 
286 static walk_rc_t
288 {
289  gre_tunnel_t *t = ctx;
291 
292  gre_teib_mk_key (t, teib_entry_get (nei), &key);
293  gre_tunnel_db_remove (t, &key);
294 
295  return (WALK_CONTINUE);
296 }
297 
298 static walk_rc_t
300 {
301  gre_tunnel_t *t = ctx;
303 
304  gre_teib_mk_key (t, teib_entry_get (nei), &key);
305  gre_tunnel_db_add (t, &key);
306 
307  return (WALK_CONTINUE);
308 }
309 
310 static int
312  u32 outer_fib_index, u32 * sw_if_indexp)
313 {
314  gre_main_t *gm = &gre_main;
315  vnet_main_t *vnm = gm->vnet_main;
316  ip4_main_t *im4 = &ip4_main;
317  ip6_main_t *im6 = &ip6_main;
318  gre_tunnel_t *t;
320  u32 hw_if_index, sw_if_index;
321  clib_error_t *error;
322  u8 is_ipv6 = a->is_ipv6;
324 
325  t = gre_tunnel_db_find (a, outer_fib_index, &key);
326  if (NULL != t)
327  return VNET_API_ERROR_IF_ALREADY_EXISTS;
328 
330  clib_memset (t, 0, sizeof (*t));
331 
332  /* Reconcile the real dev_instance and a possible requested instance */
333  u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
334  u32 u_idx = a->instance; /* user specified instance */
335  if (u_idx == ~0)
336  u_idx = t_idx;
337  if (hash_get (gm->instance_used, u_idx))
338  {
339  pool_put (gm->tunnels, t);
340  return VNET_API_ERROR_INSTANCE_IN_USE;
341  }
342  hash_set (gm->instance_used, u_idx, 1);
343 
344  t->dev_instance = t_idx; /* actual */
345  t->user_instance = u_idx; /* name */
346 
347  t->type = a->type;
348  t->mode = a->mode;
349  t->flags = a->flags;
350  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
351  t->session_id = a->session_id;
352 
353  if (t->type == GRE_TUNNEL_TYPE_L3)
354  {
355  if (t->mode == TUNNEL_MODE_P2P)
356  hw_if_index =
357  vnet_register_interface (vnm, gre_device_class.index, t_idx,
358  gre_hw_interface_class.index, t_idx);
359  else
360  hw_if_index =
361  vnet_register_interface (vnm, gre_device_class.index, t_idx,
362  mgre_hw_interface_class.index, t_idx);
363  }
364  else
365  {
366  /* Default MAC address (d00b:eed0:0000 + sw_if_index) */
367  u8 address[6] =
368  { 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx };
369  error =
371  address, &hw_if_index, 0);
372  if (error)
373  {
374  clib_error_report (error);
375  return VNET_API_ERROR_INVALID_REGISTRATION;
376  }
377  }
378 
379  /* Set GRE tunnel interface output node (not used for L3 payload) */
380  if (GRE_TUNNEL_TYPE_ERSPAN == t->type)
381  vnet_set_interface_output_node (vnm, hw_if_index,
382  gre_erspan_encap_node.index);
383  else
384  vnet_set_interface_output_node (vnm, hw_if_index,
385  gre_teb_encap_node.index);
386 
387  hi = vnet_get_hw_interface (vnm, hw_if_index);
388  sw_if_index = hi->sw_if_index;
389 
390  t->hw_if_index = hw_if_index;
391  t->outer_fib_index = outer_fib_index;
394 
397 
398  if (!is_ipv6)
399  {
400  vec_validate (im4->fib_index_by_sw_if_index, sw_if_index);
401  hi->min_packet_bytes =
402  64 + sizeof (gre_header_t) + sizeof (ip4_header_t);
403  }
404  else
405  {
406  vec_validate (im6->fib_index_by_sw_if_index, sw_if_index);
407  hi->min_packet_bytes =
408  64 + sizeof (gre_header_t) + sizeof (ip6_header_t);
409  }
410 
411  /* Standard default gre MTU. */
412  vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
413 
414  /*
415  * source the FIB entry for the tunnel's destination
416  * and become a child thereof. The tunnel will then get poked
417  * when the forwarding for the entry updates, and the tunnel can
418  * re-stack accordingly
419  */
420 
421  clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
422  t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128;
424  t->tunnel_dst.fp_addr = a->dst;
425 
426  gre_tunnel_db_add (t, &key);
427 
428  if (t->mode == TUNNEL_MODE_MP)
430 
431  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
432  {
433  gre_sn_key_t skey;
434  gre_sn_t *gre_sn;
435 
436  gre_mk_sn_key (t, &skey);
437  gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey);
438  if (gre_sn != NULL)
439  {
440  gre_sn->ref_count++;
441  t->gre_sn = gre_sn;
442  }
443  else
444  {
445  gre_sn = clib_mem_alloc (sizeof (gre_sn_t));
446  gre_sn->seq_num = 0;
447  gre_sn->ref_count = 1;
448  t->gre_sn = gre_sn;
449  hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn);
450  }
451  }
452 
453  if (t->type != GRE_TUNNEL_TYPE_L3)
454  {
456  (t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index);
458  }
459 
460  if (sw_if_indexp)
461  *sw_if_indexp = sw_if_index;
462 
463  /* register gre46-input nodes */
464  ip4_register_protocol (IP_PROTOCOL_GRE, gre4_input_node.index);
465  ip6_register_protocol (IP_PROTOCOL_GRE, gre6_input_node.index);
466 
467  return 0;
468 }
469 
470 static int
472  u32 outer_fib_index, u32 * sw_if_indexp)
473 {
474  gre_main_t *gm = &gre_main;
475  vnet_main_t *vnm = gm->vnet_main;
476  gre_tunnel_t *t;
479 
480  t = gre_tunnel_db_find (a, outer_fib_index, &key);
481  if (NULL == t)
482  return VNET_API_ERROR_NO_SUCH_ENTRY;
483 
484  if (t->mode == TUNNEL_MODE_MP)
486 
487  sw_if_index = t->sw_if_index;
488  vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
489 
490  /* make sure tunnel is removed from l2 bd or xconnect */
491  set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0,
492  L2_BD_PORT_TYPE_NORMAL, 0, 0);
494 
495  if (t->type == GRE_TUNNEL_TYPE_L3)
497  else
499 
501  {
504  }
505 
506  ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL));
507  if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1))
508  {
509  gre_sn_key_t skey;
510  gre_mk_sn_key (t, &skey);
511  hash_unset_mem_free (&gm->seq_num_by_key, &skey);
512  clib_mem_free (t->gre_sn);
513  }
514 
516  gre_tunnel_db_remove (t, &key);
517  pool_put (gm->tunnels, t);
518 
519  if (sw_if_indexp)
520  *sw_if_indexp = sw_if_index;
521 
522  return 0;
523 }
524 
525 int
527  u32 * sw_if_indexp)
528 {
529  u32 outer_fib_index;
530 
531  if (!a->is_ipv6)
532  outer_fib_index = ip4_fib_index_from_table_id (a->outer_table_id);
533  else
534  outer_fib_index = ip6_fib_index_from_table_id (a->outer_table_id);
535 
536  if (~0 == outer_fib_index)
537  return VNET_API_ERROR_NO_SUCH_FIB;
538 
540  return VNET_API_ERROR_INVALID_SESSION_ID;
541 
542  if (a->mode == TUNNEL_MODE_MP && !ip46_address_is_zero (&a->dst))
543  return (VNET_API_ERROR_INVALID_DST_ADDRESS);
544 
545  if (a->is_add)
546  return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp));
547  else
548  return (vnet_gre_tunnel_delete (a, outer_fib_index, sw_if_indexp));
549 }
550 
551 clib_error_t *
553 {
554  gre_main_t *gm = &gre_main;
556  gre_tunnel_t *t;
557  u32 ti;
558 
559  hi = vnet_get_hw_interface (vnm, hw_if_index);
560 
561  if (NULL == gm->tunnel_index_by_sw_if_index ||
563  return (NULL);
564 
566 
567  if (~0 == ti)
568  /* not one of ours */
569  return (NULL);
570 
571  t = pool_elt_at_index (gm->tunnels, ti);
572 
574  vnet_hw_interface_set_flags (vnm, hw_if_index,
576  else
577  vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
578 
579  gre_tunnel_restack (t);
580 
581  return /* no error */ 0;
582 }
583 
584 static clib_error_t *
586  unformat_input_t * input,
587  vlib_cli_command_t * cmd)
588 {
589  unformat_input_t _line_input, *line_input = &_line_input;
591  ip46_address_t src = ip46_address_initializer, dst =
593  u32 instance = ~0;
594  u32 outer_table_id = 0;
595  gre_tunnel_type_t t_type = GRE_TUNNEL_TYPE_L3;
596  tunnel_mode_t t_mode = TUNNEL_MODE_P2P;
597  u32 session_id = 0;
598  int rv;
599  u8 is_add = 1;
601  clib_error_t *error = NULL;
602 
603  /* Get a line of input. */
604  if (!unformat_user (input, unformat_line_input, line_input))
605  return 0;
606 
607  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
608  {
609  if (unformat (line_input, "del"))
610  is_add = 0;
611  else if (unformat (line_input, "instance %d", &instance))
612  ;
613  else if (unformat (line_input, "src %U", unformat_ip46_address, &src))
614  ;
615  else if (unformat (line_input, "dst %U", unformat_ip46_address, &dst))
616  ;
617  else if (unformat (line_input, "outer-table-id %d", &outer_table_id))
618  ;
619  else if (unformat (line_input, "multipoint"))
620  t_mode = TUNNEL_MODE_MP;
621  else if (unformat (line_input, "teb"))
622  t_type = GRE_TUNNEL_TYPE_TEB;
623  else if (unformat (line_input, "erspan %d", &session_id))
624  t_type = GRE_TUNNEL_TYPE_ERSPAN;
625  else
626  {
627  error = clib_error_return (0, "unknown input `%U'",
628  format_unformat_error, line_input);
629  goto done;
630  }
631  }
632 
633  if (ip46_address_is_equal (&src, &dst))
634  {
635  error = clib_error_return (0, "src and dst are identical");
636  goto done;
637  }
638 
639  if (t_mode != TUNNEL_MODE_MP && ip46_address_is_zero (&dst))
640  {
641  error = clib_error_return (0, "destination address not specified");
642  goto done;
643  }
644 
645  if (ip46_address_is_zero (&src))
646  {
647  error = clib_error_return (0, "source address not specified");
648  goto done;
649  }
650 
651  if (ip46_address_is_ip4 (&src) != ip46_address_is_ip4 (&dst))
652  {
653  error =
654  clib_error_return (0, "src and dst address must be the same AF");
655  goto done;
656  }
657 
658  clib_memset (a, 0, sizeof (*a));
659  a->is_add = is_add;
661  a->type = t_type;
662  a->mode = t_mode;
663  a->session_id = session_id;
664  a->is_ipv6 = !ip46_address_is_ip4 (&src);
665  a->instance = instance;
666  clib_memcpy (&a->src, &src, sizeof (a->src));
667  clib_memcpy (&a->dst, &dst, sizeof (a->dst));
668 
669  rv = vnet_gre_tunnel_add_del (a, &sw_if_index);
670 
671  switch (rv)
672  {
673  case 0:
675  vnet_get_main (), sw_if_index);
676  break;
677  case VNET_API_ERROR_IF_ALREADY_EXISTS:
678  error = clib_error_return (0, "GRE tunnel already exists...");
679  goto done;
680  case VNET_API_ERROR_NO_SUCH_FIB:
681  error = clib_error_return (0, "outer table ID %d doesn't exist\n",
682  outer_table_id);
683  goto done;
684  case VNET_API_ERROR_NO_SUCH_ENTRY:
685  error = clib_error_return (0, "GRE tunnel doesn't exist");
686  goto done;
687  case VNET_API_ERROR_INVALID_SESSION_ID:
688  error = clib_error_return (0, "session ID %d out of range\n",
689  session_id);
690  goto done;
691  case VNET_API_ERROR_INSTANCE_IN_USE:
692  error = clib_error_return (0, "Instance is in use");
693  goto done;
694  default:
695  error =
696  clib_error_return (0, "vnet_gre_tunnel_add_del returned %d", rv);
697  goto done;
698  }
699 
700 done:
701  unformat_free (line_input);
702 
703  return error;
704 }
705 
706 /* *INDENT-OFF* */
707 VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {
708  .path = "create gre tunnel",
709  .short_help = "create gre tunnel src <addr> dst <addr> [instance <n>] "
710  "[outer-fib-id <fib>] [teb | erspan <session-id>] [del]",
711  .function = create_gre_tunnel_command_fn,
712 };
713 /* *INDENT-ON* */
714 
715 static clib_error_t *
717  unformat_input_t * input,
718  vlib_cli_command_t * cmd)
719 {
720  gre_main_t *gm = &gre_main;
721  gre_tunnel_t *t;
722  u32 ti = ~0;
723 
724  if (pool_elts (gm->tunnels) == 0)
725  vlib_cli_output (vm, "No GRE tunnels configured...");
726 
728  {
729  if (unformat (input, "%d", &ti))
730  ;
731  else
732  break;
733  }
734 
735  if (~0 == ti)
736  {
737  /* *INDENT-OFF* */
738  pool_foreach (t, gm->tunnels,
739  ({
740  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
741  }));
742  /* *INDENT-ON* */
743  }
744  else
745  {
746  t = pool_elt_at_index (gm->tunnels, ti);
747 
748  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
749  }
750 
751  return 0;
752 }
753 
754 /* *INDENT-OFF* */
755 VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = {
756  .path = "show gre tunnel",
757  .function = show_gre_tunnel_command_fn,
758 };
759 /* *INDENT-ON* */
760 
761 const static teib_vft_t gre_teib_vft = {
763  .nv_deleted = gre_teib_entry_deleted,
764 };
765 
766 /* force inclusion from application's main.c */
767 clib_error_t *
769 {
770  teib_register (&gre_teib_vft);
771 
772  return (NULL);
773 }
774 
776 
777 /*
778  * fd.io coding-style-patch-verification: ON
779  *
780  * Local Variables:
781  * eval: (c-set-style "gnu")
782  * End:
783  */
vnet_main_t * vnet_main
Definition: gre.h:286
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:509
void vnet_set_interface_output_node(vnet_main_t *vnm, u32 hw_if_index, u32 node_index)
Set interface output node - for interface registered without its output/tx nodes created because its ...
fib_protocol_t fp_proto
protocol type
Definition: fib_types.h:212
uword * seq_num_by_key
Hash mapping tunnel src/dst addr and fib-idx to sequence number.
Definition: gre.h:273
void gre_tunnel_stack(adj_index_t ai)
gre_tunnel_stack
Definition: interface.c:132
static void gre_tunnel_db_add(gre_tunnel_t *t, gre_tunnel_key_t *key)
Definition: interface.c:97
void adj_nbr_walk_nh(u32 sw_if_index, fib_protocol_t adj_nh_proto, const ip46_address_t *nh, adj_walk_cb_t cb, void *ctx)
Walk adjacencies on a link with a given next-hop.
Definition: adj_nbr.c:663
static void gre_mk_key6(const ip6_address_t *src, const ip6_address_t *dst, u32 fib_index, gre_tunnel_type_t ttype, tunnel_mode_t tmode, u16 session_id, gre_tunnel_key6_t *key)
Definition: gre.h:403
vlib_node_registration_t gre4_input_node
(constructor) VLIB_REGISTER_NODE (gre4_input_node)
Definition: node.c:454
#define hash_set(h, key, value)
Definition: hash.h:255
uword * tunnel_by_key6
Hash mapping to tunnels with ipv6 src/dst addr.
Definition: gre.h:268
GRE related global data.
Definition: gre.h:243
u32 hw_if_index
Definition: gre.h:205
teib_entry_t * teib_entry_get(index_t tei)
Definition: teib.c:80
#define hash_unset(h, key)
Definition: hash.h:261
vl_api_wireguard_peer_flags_t flags
Definition: wireguard.api:103
a
Definition: bitmap.h:538
void ip6_register_protocol(u32 protocol, u32 node_index)
Definition: ip6_forward.c:1664
static u8 * format_gre_tunnel(u8 *s, va_list *args)
Definition: interface.c:48
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
vl_api_fib_path_nh_t nh
Definition: fib_types.api:126
static gre_tunnel_t * gre_tunnel_db_find(const vnet_gre_tunnel_add_del_args_t *a, u32 outer_fib_index, gre_tunnel_key_t *key)
Definition: interface.c:71
void adj_midchain_delegate_stack(adj_index_t ai, u32 fib_index, const fib_prefix_t *pfx)
create/attach a midchain delegate and stack it on the prefix passed
static void gre_tunnel_restack(gre_tunnel_t *gt)
Definition: interface.c:172
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
IP unicast adjacency.
Definition: adj.h:227
static vnet_hw_interface_t * vnet_get_hw_interface(vnet_main_t *vnm, u32 hw_if_index)
tunnel_mode_t mode
Definition: gre.h:367
u32 outer_fib_index
The FIB in which the src.dst address are present.
Definition: gre.h:204
u32 index_t
A Data-Path Object is an object that represents actions that are applied to packets are they are swit...
Definition: dpo.h:41
vl_api_address_t src
Definition: gre.api:54
static adj_walk_rc_t gre_adj_walk_cb(adj_index_t ai, void *ctx)
Call back when restacking all adjacencies on a GRE interface.
Definition: interface.c:164
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:989
vlib_main_t * vm
Definition: in2out_ed.c:1582
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:122
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
clib_error_t * ethernet_register_interface(vnet_main_t *vnm, u32 dev_class_index, u32 dev_instance, const u8 *address, u32 *hw_if_index_return, ethernet_flag_change_function_t flag_change)
Definition: interface.c:331
void ip4_register_protocol(u32 protocol, u32 node_index)
Definition: ip4_forward.c:1933
static u8 ip46_address_is_ip4(const ip46_address_t *ip46)
Definition: ip46_address.h:55
static int vnet_gre_tunnel_add(vnet_gre_tunnel_add_del_args_t *a, u32 outer_fib_index, u32 *sw_if_indexp)
Definition: interface.c:311
const ip46_address_t * teib_entry_get_peer(const teib_entry_t *te)
Definition: teib.c:62
format_function_t format_vnet_sw_if_index_name
unsigned char u8
Definition: types.h:56
enum fib_protocol_t_ fib_protocol_t
Protocol Type.
u32 * tunnel_index_by_sw_if_index
Mapping from sw_if_index to tunnel index.
Definition: gre.h:278
void teib_walk_itf(u32 sw_if_index, teib_walk_cb_t fn, void *ctx)
Definition: teib.c:209
static void gre_mk_key4(ip4_address_t src, ip4_address_t dst, u32 fib_index, gre_tunnel_type_t ttype, tunnel_mode_t tmode, u16 session_id, gre_tunnel_key4_t *key)
Definition: gre.h:380
#define clib_memcpy(d, s, n)
Definition: string.h:180
u32 seq_num
Definition: gre.h:169
vnet_hw_interface_class_t mgre_hw_interface_class
u32 teib_entry_get_fib_index(const teib_entry_t *te)
Definition: teib.c:56
Hash key for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:176
enum walk_rc_t_ walk_rc_t
Walk return code.
static ip_adjacency_t * adj_get(adj_index_t adj_index)
Get a pointer to an adjacency object from its index.
Definition: adj.h:459
u32 sw_if_index
Definition: gre.h:206
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:513
u32 dev_instance
Definition: gre.h:230
adj_walk_rc_t mgre_mk_complete_walk(adj_index_t ai, void *data)
Definition: gre.c:429
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
teib_entry_added_t nv_added
Definition: teib.h:71
enum adj_walk_rc_t_ adj_walk_rc_t
return codes from a adjacency walker callback function
clib_error_t * gre_interface_init(vlib_main_t *vm)
Definition: interface.c:768
Aggregate type for a prefix.
Definition: fib_types.h:203
#define clib_error_return(e, args...)
Definition: error.h:99
static void gre_tunnel_db_remove(gre_tunnel_t *t, gre_tunnel_key_t *key)
Definition: interface.c:112
ip46_address_t src
Definition: gre.h:370
void adj_unlock(adj_index_t adj_index)
Release a reference counting lock on the adjacency.
Definition: adj.c:348
unsigned int u32
Definition: types.h:88
adj_index_t l2_adj_index
an L2 tunnel always rquires an L2 midchain.
Definition: gre.h:214
u16 fp_len
The mask length.
Definition: fib_types.h:207
ip46_address_t tunnel_src
The tunnel&#39;s source/local address.
Definition: gre.h:196
u32 vnet_register_interface(vnet_main_t *vnm, u32 dev_class_index, u32 dev_instance, u32 hw_class_index, u32 hw_instance)
Definition: interface.c:768
static void gre_teib_mk_key(const gre_tunnel_t *t, const teib_entry_t *ne, gre_tunnel_key_t *key)
Definition: interface.c:186
unformat_function_t unformat_line_input
Definition: format.h:283
vl_api_fib_path_type_t type
Definition: fib_types.api:123
static clib_error_t * create_gre_tunnel_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: interface.c:585
u8 * format_gre_tunnel_type(u8 *s, va_list *args)
Definition: interface.c:31
#define hash_get(h, key)
Definition: hash.h:249
uword * tunnel_by_key4
Hash mapping to tunnels with ipv4 src/dst addr.
Definition: gre.h:263
#define ADJ_INDEX_INVALID
Invalid ADJ index - used when no adj is known likewise blazoned capitals INVALID speak volumes where ...
Definition: adj_types.h:36
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:534
A representation of a GRE tunnel.
Definition: gre.h:186
uword * instance_used
Definition: gre.h:289
static uword vnet_hw_interface_get_flags(vnet_main_t *vnm, u32 hw_if_index)
ip46_address_t fp_addr
The address type is not deriveable from the fp_addr member.
Definition: fib_types.h:226
u32 teib_entry_get_sw_if_index(const teib_entry_t *te)
accessors for the opaque struct
Definition: teib.c:50
vl_api_ip_proto_t proto
Definition: acl_types.api:50
#define gm
Definition: dlmalloc.c:1219
static u8 ip46_address_is_zero(const ip46_address_t *ip46)
Definition: ip46_address.h:87
long ctx[MAX_CONNS]
Definition: main.c:144
static u32 ip6_fib_index_from_table_id(u32 table_id)
Definition: ip6_fib.h:172
struct _unformat_input_t unformat_input_t
u32 session_id
Definition: flow_types.api:131
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:302
gre_tunnel_key4_t gtk_v4
Definition: gre.h:155
void gre_update_adj(vnet_main_t *vnm, u32 sw_if_index, adj_index_t ai)
Definition: gre.c:404
u32 outer_table_id
Definition: gre.api:52
ip6_main_t ip6_main
Definition: ip6_forward.c:2781
static void gre_teib_entry_deleted(const teib_entry_t *ne)
Definition: interface.c:253
static void gre_teib_entry_added(const teib_entry_t *ne)
An NHRP entry has been added.
Definition: interface.c:210
vl_api_address_t dst
Definition: gre.api:55
static u8 ip46_address_is_equal(const ip46_address_t *ip46_1, const ip46_address_t *ip46_2)
Definition: ip46_address.h:93
#define GTK_SESSION_ID_MAX
The session ID is only a 10 bit value.
Definition: gre.h:162
format_function_t format_ip46_address
Definition: ip46_address.h:50
clib_error_t * gre_interface_admin_up_down(vnet_main_t *vnm, u32 hw_if_index, u32 flags)
Definition: interface.c:552
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P with alignment A.
Definition: pool.h:246
static clib_error_t * show_gre_tunnel_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: interface.c:716
static walk_rc_t gre_tunnel_delete_teib_walk(index_t nei, void *ctx)
Definition: interface.c:287
gre_tunnel_type_t type
Definition: gre.h:207
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
Definition: teib.c:29
gre_sn_t * gre_sn
GRE header sequence number (SN) used for ERSPAN type 2 header, must be bumped automically to be threa...
Definition: gre.h:227
gre_tunnel_key6_t gtk_v6
Definition: gre.h:156
Used for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:167
static u32 ip4_fib_index_from_table_id(u32 table_id)
Definition: ip4_fib.h:145
u32 adj_index_t
An index for adjacencies.
Definition: adj_types.h:30
void adj_nbr_walk(u32 sw_if_index, fib_protocol_t adj_nh_proto, adj_walk_cb_t cb, void *ctx)
Walk all adjacencies on a link for a given next-hop protocol.
Definition: adj_nbr.c:571
adj_walk_rc_t mgre_mk_incomplete_walk(adj_index_t ai, void *data)
Definition: gre.c:449
void adj_midchain_delegate_unstack(adj_index_t ai)
unstack a midchain delegate (this stacks it on a drop)
ip46_address_t dst
Definition: gre.h:370
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:158
static int vnet_gre_tunnel_delete(vnet_gre_tunnel_add_del_args_t *a, u32 outer_fib_index, u32 *sw_if_indexp)
Definition: interface.c:471
gre_tunnel_type_t type
Definition: gre.h:366
void ethernet_delete_interface(vnet_main_t *vnm, u32 hw_if_index)
Definition: interface.c:378
#define ASSERT(truth)
int vnet_gre_tunnel_add_del(vnet_gre_tunnel_add_del_args_t *a, u32 *sw_if_indexp)
Definition: interface.c:526
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:696
manual_print typedef address
Definition: ip_types.api:85
gre_tunnel_t * tunnels
pool of tunnel instances
Definition: gre.h:248
IPv4 main type.
Definition: ip4.h:106
static void clib_mem_free(void *p)
Definition: mem.h:215
static walk_rc_t gre_tunnel_add_teib_walk(index_t nei, void *ctx)
Definition: interface.c:299
tunnel_mode_t mode
Definition: gre.h:208
u32 set_int_l2_mode(vlib_main_t *vm, vnet_main_t *vnet_main, u32 mode, u32 sw_if_index, u32 bd_index, l2_bd_port_type_t port_type, u32 shg, u32 xc_sw_if_index)
Set the subinterface to run in l2 or l3 mode.
Definition: l2_input.c:580
#define clib_error_report(e)
Definition: error.h:113
static void hash_unset_mem_free(uword **h, const void *key)
Definition: hash.h:295
Union of the two possible key types.
Definition: gre.h:153
static void * clib_mem_alloc(uword size)
Definition: mem.h:157
vnet_hw_interface_class_t gre_hw_interface_class
unformat_function_t unformat_ip46_address
Definition: format.h:63
u32 user_instance
Definition: gre.h:231
vl_api_ip4_address_t hi
Definition: arp.api:37
void vnet_delete_hw_interface(vnet_main_t *vnm, u32 hw_if_index)
Definition: interface.c:984
typedef key
Definition: ipsec_types.api:85
vnet_device_class_t gre_device_class
vlib_node_registration_t gre_teb_encap_node
(constructor) VLIB_REGISTER_NODE (gre_teb_encap_node)
Definition: gre.c:670
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u32 instance
Definition: gre.api:51
#define INDEX_INVALID
Invalid index - used when no index is known blazoned capitals INVALID speak volumes where ~0 does not...
Definition: dpo.h:47
clib_error_t * vnet_hw_interface_set_flags(vnet_main_t *vnm, u32 hw_if_index, vnet_hw_interface_flags_t flags)
Definition: interface.c:498
u64 uword
Definition: types.h:112
u32 ref_count
Definition: gre.h:170
static void unformat_free(unformat_input_t *i)
Definition: format.h:163
void vnet_sw_interface_set_mtu(vnet_main_t *vnm, u32 sw_if_index, u32 mtu)
Definition: interface.c:670
#define FOR_EACH_FIB_IP_PROTOCOL(_item)
Definition: fib_types.h:70
#define hash_get_mem(h, key)
Definition: hash.h:269
tunnel_encap_decap_flags_t flags
Definition: gre.h:373
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
vlib_node_registration_t gre_erspan_encap_node
(constructor) VLIB_REGISTER_NODE (gre_erspan_encap_node)
Definition: gre.c:683
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1144
clib_error_t * vnet_sw_interface_set_flags(vnet_main_t *vnm, u32 sw_if_index, vnet_sw_interface_flags_t flags)
Definition: interface.c:507
vlib_node_registration_t gre6_input_node
(constructor) VLIB_REGISTER_NODE (gre6_input_node)
Definition: node.c:474
enum gre_tunnel_type_t_ gre_tunnel_type_t
The GRE tunnel type.
fib_prefix_t tunnel_dst
The tunnel&#39;s destination/remote address.
Definition: gre.h:200
u8 * format_tunnel_mode(u8 *s, va_list *args)
Definition: tunnel.c:21
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:236
vlib_main_t * vlib_main
Definition: gre.h:285
static void hash_set_mem_alloc(uword **h, const void *key, uword v)
Definition: hash.h:279
bool is_ipv6
Definition: dhcp.api:202
#define vec_validate_init_empty(V, I, INIT)
Make sure vector is long enough for given index and initialize empty space (no header, unspecified alignment)
Definition: vec.h:556
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
void teib_register(const teib_vft_t *vft)
Definition: teib.c:223
u32 * fib_index_by_sw_if_index
Definition: ip6.h:196
gre_main_t gre_main
Definition: gre.c:26
enum tunnel_mode_t_ tunnel_mode_t
u16 session_id
ERSPAN type 2 session ID, least significant 10 bits of u16.
Definition: gre.h:219
static void gre_mk_sn_key(const gre_tunnel_t *gt, gre_sn_key_t *key)
Definition: gre.h:427
tunnel_encap_decap_flags_t flags
Definition: gre.h:209
#define ip46_address_initializer
Definition: ip46_address.h:52
const ip46_address_t zero_addr
Definition: lookup.c:181
vl_api_interface_index_t sw_if_index
Definition: wireguard.api:33
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171
#define MODE_L3
Definition: l2_input.h:220
const fib_prefix_t * teib_entry_get_nh(const teib_entry_t *te)
Definition: teib.c:68
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128