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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/nhrp/nhrp.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 u8 *
48 format_gre_tunnel_mode (u8 * s, va_list * args)
49 {
50  gre_tunnel_mode_t mode = va_arg (*args, int);
51 
52  switch (mode)
53  {
54 #define _(n, v) case GRE_TUNNEL_MODE_##n: \
55  s = format (s, "%s", v); \
56  break;
58 #undef _
59  }
60 
61  return (s);
62 }
63 
64 static u8 *
65 format_gre_tunnel (u8 * s, va_list * args)
66 {
67  gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *);
68 
69  s = format (s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ",
74 
75  s = format (s, "payload %U ", format_gre_tunnel_type, t->type);
76  s = format (s, "%U ", format_gre_tunnel_mode, t->mode);
77 
78  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
79  s = format (s, "session %d ", t->session_id);
80 
81  if (t->type != GRE_TUNNEL_TYPE_L3)
82  s = format (s, "l2-adj-idx %d ", t->l2_adj_index);
83 
84  return s;
85 }
86 
87 static gre_tunnel_t *
89  u32 outer_fib_index, gre_tunnel_key_t * key)
90 {
92  uword *p;
93 
94  if (!a->is_ipv6)
95  {
96  gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index,
97  a->type, a->mode, a->session_id, &key->gtk_v4);
98  p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
99  }
100  else
101  {
102  gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index,
103  a->type, a->mode, a->session_id, &key->gtk_v6);
104  p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6);
105  }
106 
107  if (NULL == p)
108  return (NULL);
109 
110  return (pool_elt_at_index (gm->tunnels, p[0]));
111 }
112 
113 static void
115 {
116  gre_main_t *gm = &gre_main;
117 
119  {
121  }
122  else
123  {
125  }
126 }
127 
128 static void
130 {
131  gre_main_t *gm = &gre_main;
132 
134  {
136  }
137  else
138  {
140  }
141 }
142 
143 /**
144  * gre_tunnel_stack
145  *
146  * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
147  */
148 void
150 {
151  gre_main_t *gm = &gre_main;
152  ip_adjacency_t *adj;
153  gre_tunnel_t *gt;
155 
156  adj = adj_get (ai);
157  sw_if_index = adj->rewrite_header.sw_if_index;
158 
159  if ((vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index) ||
160  (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
161  return;
162 
163  gt = pool_elt_at_index (gm->tunnels,
164  gm->tunnel_index_by_sw_if_index[sw_if_index]);
165 
168  {
170  }
171  else
172  {
174  }
175 }
176 
177 /**
178  * @brief Call back when restacking all adjacencies on a GRE interface
179  */
180 static adj_walk_rc_t
182 {
183  gre_tunnel_stack (ai);
184 
185  return (ADJ_WALK_RC_CONTINUE);
186 }
187 
188 static void
190 {
192 
193  /*
194  * walk all the adjacencies on th GRE interface and restack them
195  */
197  {
199  }
200 }
201 
202 static void
204  const nhrp_entry_t * ne, gre_tunnel_key_t * key)
205 {
206  const fib_prefix_t *nh;
207 
208  nh = nhrp_entry_get_nh (ne);
209 
210  /* construct the key using mode P2P so it can be found in the DP */
211  if (FIB_PROTOCOL_IP4 == nh->fp_proto)
212  gre_mk_key4 (t->tunnel_src.ip4,
213  nh->fp_addr.ip4,
215  t->type, GRE_TUNNEL_MODE_P2P, 0, &key->gtk_v4);
216  else
217  gre_mk_key6 (&t->tunnel_src.ip6,
218  &nh->fp_addr.ip6,
220  t->type, GRE_TUNNEL_MODE_P2P, 0, &key->gtk_v6);
221 }
222 
223 static void
225 {
226  gre_main_t *gm = &gre_main;
228  gre_tunnel_t *t;
230  u32 t_idx;
231 
232  sw_if_index = nhrp_entry_get_sw_if_index (ne);
233  if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
234  return;
235 
237 
238  if (INDEX_INVALID == t_idx)
239  return;
240 
241  t = pool_elt_at_index (gm->tunnels, t_idx);
242 
243  gre_nhrp_mk_key (t, ne, &key);
244  gre_tunnel_db_add (t, &key);
245 }
246 
247 static void
249 {
250  gre_main_t *gm = &gre_main;
252  gre_tunnel_t *t;
254  u32 t_idx;
255 
256  sw_if_index = nhrp_entry_get_sw_if_index (ne);
257  if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
258  return;
259 
261 
262  if (INDEX_INVALID == t_idx)
263  return;
264 
265  t = pool_elt_at_index (gm->tunnels, t_idx);
266 
267  gre_nhrp_mk_key (t, ne, &key);
268  gre_tunnel_db_remove (t, &key);
269 }
270 
271 static walk_rc_t
273 {
274  gre_tunnel_t *t = ctx;
276 
277  gre_nhrp_mk_key (t, nhrp_entry_get (nei), &key);
278  gre_tunnel_db_remove (t, &key);
279 
280  return (WALK_CONTINUE);
281 }
282 
283 static walk_rc_t
285 {
286  gre_tunnel_t *t = ctx;
288 
289  gre_nhrp_mk_key (t, nhrp_entry_get (nei), &key);
290  gre_tunnel_db_add (t, &key);
291 
292  return (WALK_CONTINUE);
293 }
294 
295 static int
297  u32 outer_fib_index, u32 * sw_if_indexp)
298 {
299  gre_main_t *gm = &gre_main;
300  vnet_main_t *vnm = gm->vnet_main;
301  ip4_main_t *im4 = &ip4_main;
302  ip6_main_t *im6 = &ip6_main;
303  gre_tunnel_t *t;
305  u32 hw_if_index, sw_if_index;
306  clib_error_t *error;
307  u8 is_ipv6 = a->is_ipv6;
309 
310  t = gre_tunnel_db_find (a, outer_fib_index, &key);
311  if (NULL != t)
312  return VNET_API_ERROR_IF_ALREADY_EXISTS;
313 
315  clib_memset (t, 0, sizeof (*t));
316 
317  /* Reconcile the real dev_instance and a possible requested instance */
318  u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
319  u32 u_idx = a->instance; /* user specified instance */
320  if (u_idx == ~0)
321  u_idx = t_idx;
322  if (hash_get (gm->instance_used, u_idx))
323  {
324  pool_put (gm->tunnels, t);
325  return VNET_API_ERROR_INSTANCE_IN_USE;
326  }
327  hash_set (gm->instance_used, u_idx, 1);
328 
329  t->dev_instance = t_idx; /* actual */
330  t->user_instance = u_idx; /* name */
331 
332  t->type = a->type;
333  t->mode = a->mode;
334  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
335  t->session_id = a->session_id;
336 
337  if (t->type == GRE_TUNNEL_TYPE_L3)
338  {
339  if (t->mode == GRE_TUNNEL_MODE_P2P)
340  hw_if_index =
341  vnet_register_interface (vnm, gre_device_class.index, t_idx,
342  gre_hw_interface_class.index, t_idx);
343  else
344  hw_if_index =
345  vnet_register_interface (vnm, gre_device_class.index, t_idx,
346  mgre_hw_interface_class.index, t_idx);
347  }
348  else
349  {
350  /* Default MAC address (d00b:eed0:0000 + sw_if_index) */
351  u8 address[6] =
352  { 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx };
353  error =
355  address, &hw_if_index, 0);
356  if (error)
357  {
358  clib_error_report (error);
359  return VNET_API_ERROR_INVALID_REGISTRATION;
360  }
361  }
362 
363  /* Set GRE tunnel interface output node (not used for L3 payload) */
364  vnet_set_interface_output_node (vnm, hw_if_index, gre_encap_node.index);
365 
366  hi = vnet_get_hw_interface (vnm, hw_if_index);
367  sw_if_index = hi->sw_if_index;
368 
369  t->hw_if_index = hw_if_index;
370  t->outer_fib_index = outer_fib_index;
373 
376 
377  if (!is_ipv6)
378  {
379  vec_validate (im4->fib_index_by_sw_if_index, sw_if_index);
380  hi->min_packet_bytes =
381  64 + sizeof (gre_header_t) + sizeof (ip4_header_t);
382  }
383  else
384  {
385  vec_validate (im6->fib_index_by_sw_if_index, sw_if_index);
386  hi->min_packet_bytes =
387  64 + sizeof (gre_header_t) + sizeof (ip6_header_t);
388  }
389 
390  /* Standard default gre MTU. */
391  vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
392 
393  /*
394  * source the FIB entry for the tunnel's destination
395  * and become a child thereof. The tunnel will then get poked
396  * when the forwarding for the entry updates, and the tunnel can
397  * re-stack accordingly
398  */
399 
400  clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
401  t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128;
403  t->tunnel_dst.fp_addr = a->dst;
404 
405  gre_tunnel_db_add (t, &key);
406 
407  if (t->mode == GRE_TUNNEL_MODE_MP)
409 
410  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
411  {
412  gre_sn_key_t skey;
413  gre_sn_t *gre_sn;
414 
415  gre_mk_sn_key (t, &skey);
416  gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey);
417  if (gre_sn != NULL)
418  {
419  gre_sn->ref_count++;
420  t->gre_sn = gre_sn;
421  }
422  else
423  {
424  gre_sn = clib_mem_alloc (sizeof (gre_sn_t));
425  gre_sn->seq_num = 0;
426  gre_sn->ref_count = 1;
427  t->gre_sn = gre_sn;
428  hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn);
429  }
430  }
431 
432  if (t->type != GRE_TUNNEL_TYPE_L3)
433  {
435  (t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index);
437  }
438 
439  if (sw_if_indexp)
440  *sw_if_indexp = sw_if_index;
441 
442  /* register gre46-input nodes */
443  ip4_register_protocol (IP_PROTOCOL_GRE, gre4_input_node.index);
444  ip6_register_protocol (IP_PROTOCOL_GRE, gre6_input_node.index);
445 
446  return 0;
447 }
448 
449 static int
451  u32 outer_fib_index, u32 * sw_if_indexp)
452 {
453  gre_main_t *gm = &gre_main;
454  vnet_main_t *vnm = gm->vnet_main;
455  gre_tunnel_t *t;
458 
459  t = gre_tunnel_db_find (a, outer_fib_index, &key);
460  if (NULL == t)
461  return VNET_API_ERROR_NO_SUCH_ENTRY;
462 
463  if (t->mode == GRE_TUNNEL_MODE_MP)
465 
466  sw_if_index = t->sw_if_index;
467  vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
468 
469  /* make sure tunnel is removed from l2 bd or xconnect */
470  set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0,
471  L2_BD_PORT_TYPE_NORMAL, 0, 0);
473 
474  if (t->type == GRE_TUNNEL_TYPE_L3)
476  else
478 
480  {
483  }
484 
485  ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL));
486  if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1))
487  {
488  gre_sn_key_t skey;
489  gre_mk_sn_key (t, &skey);
490  hash_unset_mem_free (&gm->seq_num_by_key, &skey);
491  clib_mem_free (t->gre_sn);
492  }
493 
495  gre_tunnel_db_remove (t, &key);
496  pool_put (gm->tunnels, t);
497 
498  if (sw_if_indexp)
499  *sw_if_indexp = sw_if_index;
500 
501  return 0;
502 }
503 
504 int
506  u32 * sw_if_indexp)
507 {
508  u32 outer_fib_index;
509 
510  if (!a->is_ipv6)
511  outer_fib_index = ip4_fib_index_from_table_id (a->outer_table_id);
512  else
513  outer_fib_index = ip6_fib_index_from_table_id (a->outer_table_id);
514 
515  if (~0 == outer_fib_index)
516  return VNET_API_ERROR_NO_SUCH_FIB;
517 
519  return VNET_API_ERROR_INVALID_SESSION_ID;
520 
521  if (a->mode == GRE_TUNNEL_MODE_MP && !ip46_address_is_zero (&a->dst))
522  return (VNET_API_ERROR_INVALID_DST_ADDRESS);
523 
524  if (a->is_add)
525  return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp));
526  else
527  return (vnet_gre_tunnel_delete (a, outer_fib_index, sw_if_indexp));
528 }
529 
530 clib_error_t *
532 {
533  gre_main_t *gm = &gre_main;
535  gre_tunnel_t *t;
536  u32 ti;
537 
538  hi = vnet_get_hw_interface (vnm, hw_if_index);
539 
540  if (NULL == gm->tunnel_index_by_sw_if_index ||
542  return (NULL);
543 
545 
546  if (~0 == ti)
547  /* not one of ours */
548  return (NULL);
549 
550  t = pool_elt_at_index (gm->tunnels, ti);
551 
553  vnet_hw_interface_set_flags (vnm, hw_if_index,
555  else
556  vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
557 
558  gre_tunnel_restack (t);
559 
560  return /* no error */ 0;
561 }
562 
563 static clib_error_t *
565  unformat_input_t * input,
566  vlib_cli_command_t * cmd)
567 {
568  unformat_input_t _line_input, *line_input = &_line_input;
570  ip46_address_t src = ip46_address_initializer, dst =
572  u32 instance = ~0;
573  u32 outer_table_id = 0;
574  gre_tunnel_type_t t_type = GRE_TUNNEL_TYPE_L3;
575  gre_tunnel_mode_t t_mode = GRE_TUNNEL_MODE_P2P;
576  u32 session_id = 0;
577  int rv;
578  u8 is_add = 1;
580  clib_error_t *error = NULL;
581 
582  /* Get a line of input. */
583  if (!unformat_user (input, unformat_line_input, line_input))
584  return 0;
585 
586  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
587  {
588  if (unformat (line_input, "del"))
589  is_add = 0;
590  else if (unformat (line_input, "instance %d", &instance))
591  ;
592  else if (unformat (line_input, "src %U", unformat_ip46_address, &src))
593  ;
594  else if (unformat (line_input, "dst %U", unformat_ip46_address, &dst))
595  ;
596  else if (unformat (line_input, "outer-table-id %d", &outer_table_id))
597  ;
598  else if (unformat (line_input, "multipoint"))
599  t_mode = GRE_TUNNEL_MODE_MP;
600  else if (unformat (line_input, "teb"))
601  t_type = GRE_TUNNEL_TYPE_TEB;
602  else if (unformat (line_input, "erspan %d", &session_id))
603  t_type = GRE_TUNNEL_TYPE_ERSPAN;
604  else
605  {
606  error = clib_error_return (0, "unknown input `%U'",
607  format_unformat_error, line_input);
608  goto done;
609  }
610  }
611 
612  if (ip46_address_is_equal (&src, &dst))
613  {
614  error = clib_error_return (0, "src and dst are identical");
615  goto done;
616  }
617 
618  if (t_mode != GRE_TUNNEL_MODE_MP && ip46_address_is_zero (&dst))
619  {
620  error = clib_error_return (0, "destination address not specified");
621  goto done;
622  }
623 
624  if (ip46_address_is_zero (&src))
625  {
626  error = clib_error_return (0, "source address not specified");
627  goto done;
628  }
629 
630  if (ip46_address_is_ip4 (&src) != ip46_address_is_ip4 (&dst))
631  {
632  error =
633  clib_error_return (0, "src and dst address must be the same AF");
634  goto done;
635  }
636 
637  clib_memset (a, 0, sizeof (*a));
638  a->is_add = is_add;
640  a->type = t_type;
641  a->mode = t_mode;
642  a->session_id = session_id;
643  a->is_ipv6 = !ip46_address_is_ip4 (&src);
644  a->instance = instance;
645  clib_memcpy (&a->src, &src, sizeof (a->src));
646  clib_memcpy (&a->dst, &dst, sizeof (a->dst));
647 
648  rv = vnet_gre_tunnel_add_del (a, &sw_if_index);
649 
650  switch (rv)
651  {
652  case 0:
654  vnet_get_main (), sw_if_index);
655  break;
656  case VNET_API_ERROR_IF_ALREADY_EXISTS:
657  error = clib_error_return (0, "GRE tunnel already exists...");
658  goto done;
659  case VNET_API_ERROR_NO_SUCH_FIB:
660  error = clib_error_return (0, "outer table ID %d doesn't exist\n",
661  outer_table_id);
662  goto done;
663  case VNET_API_ERROR_NO_SUCH_ENTRY:
664  error = clib_error_return (0, "GRE tunnel doesn't exist");
665  goto done;
666  case VNET_API_ERROR_INVALID_SESSION_ID:
667  error = clib_error_return (0, "session ID %d out of range\n",
668  session_id);
669  goto done;
670  case VNET_API_ERROR_INSTANCE_IN_USE:
671  error = clib_error_return (0, "Instance is in use");
672  goto done;
673  default:
674  error =
675  clib_error_return (0, "vnet_gre_tunnel_add_del returned %d", rv);
676  goto done;
677  }
678 
679 done:
680  unformat_free (line_input);
681 
682  return error;
683 }
684 
685 /* *INDENT-OFF* */
686 VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {
687  .path = "create gre tunnel",
688  .short_help = "create gre tunnel src <addr> dst <addr> [instance <n>] "
689  "[outer-fib-id <fib>] [teb | erspan <session-id>] [del]",
690  .function = create_gre_tunnel_command_fn,
691 };
692 /* *INDENT-ON* */
693 
694 static clib_error_t *
696  unformat_input_t * input,
697  vlib_cli_command_t * cmd)
698 {
699  gre_main_t *gm = &gre_main;
700  gre_tunnel_t *t;
701  u32 ti = ~0;
702 
703  if (pool_elts (gm->tunnels) == 0)
704  vlib_cli_output (vm, "No GRE tunnels configured...");
705 
707  {
708  if (unformat (input, "%d", &ti))
709  ;
710  else
711  break;
712  }
713 
714  if (~0 == ti)
715  {
716  /* *INDENT-OFF* */
717  pool_foreach (t, gm->tunnels,
718  ({
719  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
720  }));
721  /* *INDENT-ON* */
722  }
723  else
724  {
725  t = pool_elt_at_index (gm->tunnels, ti);
726 
727  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
728  }
729 
730  return 0;
731 }
732 
733 /* *INDENT-OFF* */
734 VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = {
735  .path = "show gre tunnel",
736  .function = show_gre_tunnel_command_fn,
737 };
738 /* *INDENT-ON* */
739 
740 const static nhrp_vft_t gre_nhrp_vft = {
742  .nv_deleted = gre_nhrp_entry_deleted,
743 };
744 
745 /* force inclusion from application's main.c */
746 clib_error_t *
748 {
749  nhrp_register (&gre_nhrp_vft);
750 
751  return (NULL);
752 }
753 
755 
756 /*
757  * fd.io coding-style-patch-verification: ON
758  *
759  * Local Variables:
760  * eval: (c-set-style "gnu")
761  * End:
762  */
vnet_main_t * vnet_main
Definition: gre.h:295
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:440
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:282
void gre_tunnel_stack(adj_index_t ai)
gre_tunnel_stack
Definition: interface.c:149
static walk_rc_t gre_tunnel_add_nhrp_walk(index_t nei, void *ctx)
Definition: interface.c:284
static void gre_tunnel_db_add(gre_tunnel_t *t, gre_tunnel_key_t *key)
Definition: interface.c:114
vlib_node_registration_t gre4_input_node
(constructor) VLIB_REGISTER_NODE (gre4_input_node)
Definition: node.c:454
u8 proto
Definition: acl_types.api:47
#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:277
GRE related global data.
Definition: gre.h:252
u32 hw_if_index
Definition: gre.h:215
#define hash_unset(h, key)
Definition: hash.h:261
a
Definition: bitmap.h:538
void ip6_register_protocol(u32 protocol, u32 node_index)
Definition: ip6_forward.c:1590
Definition: nhrp.c:29
static u8 * format_gre_tunnel(u8 *s, va_list *args)
Definition: interface.c:65
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:88
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:189
#define NULL
Definition: clib.h:58
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
IP unicast adjacency.
Definition: adj.h:221
nhrp_entry_t * nhrp_entry_get(index_t nei)
Definition: nhrp.c:96
static void gre_nhrp_entry_added(const nhrp_entry_t *ne)
Definition: interface.c:224
static vnet_hw_interface_t * vnet_get_hw_interface(vnet_main_t *vnm, u32 hw_if_index)
u32 outer_fib_index
The FIB in which the src.dst address are present.
Definition: gre.h:214
static walk_rc_t gre_tunnel_delete_nhrp_walk(index_t nei, void *ctx)
Definition: interface.c:272
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:60
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:181
static void gre_nhrp_mk_key(const gre_tunnel_t *t, const nhrp_entry_t *ne, gre_tunnel_key_t *key)
Definition: interface.c:203
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:989
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:121
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:1866
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:296
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:287
#define clib_memcpy(d, s, n)
Definition: string.h:180
u32 seq_num
Definition: gre.h:179
static void gre_mk_key4(ip4_address_t src, ip4_address_t dst, u32 fib_index, gre_tunnel_type_t ttype, gre_tunnel_mode_t tmode, u16 session_id, gre_tunnel_key4_t *key)
Definition: gre.h:378
vnet_hw_interface_class_t mgre_hw_interface_class
Hash key for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:186
u8 * format_gre_tunnel_mode(u8 *s, va_list *args)
Definition: interface.c:48
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:431
u32 sw_if_index
Definition: gre.h:216
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:498
u32 dev_instance
Definition: gre.h:239
vl_api_interface_index_t sw_if_index
Definition: gre.api:59
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
enum adj_walk_rc_t_ adj_walk_rc_t
return codes from a adjacency walker callback function
gre_tunnel_mode_t mode
Definition: gre.h:218
clib_error_t * gre_interface_init(vlib_main_t *vm)
Definition: interface.c:747
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:129
ip46_address_t src
Definition: gre.h:369
void adj_unlock(adj_index_t adj_index)
Release a reference counting lock on the adjacency.
Definition: adj.c:324
unsigned int u32
Definition: types.h:88
adj_index_t l2_adj_index
an L2 tunnel always rquires an L2 midchain.
Definition: gre.h:223
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:206
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:762
vl_api_gre_tunnel_mode_t mode
Definition: gre.api:55
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:564
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:272
#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:519
A representation of a GRE tunnel.
Definition: gre.h:196
vlib_node_registration_t gre_encap_node
(constructor) VLIB_REGISTER_NODE (gre_encap_node)
Definition: gre.c:537
uword * instance_used
Definition: gre.h:298
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
#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 void gre_mk_key6(const ip6_address_t *src, const ip6_address_t *dst, u32 fib_index, gre_tunnel_type_t ttype, gre_tunnel_mode_t tmode, u16 session_id, gre_tunnel_key6_t *key)
Definition: gre.h:401
static u32 ip6_fib_index_from_table_id(u32 table_id)
Definition: ip6_fib.h:172
struct _unformat_input_t unformat_input_t
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:287
gre_tunnel_key4_t gtk_v4
Definition: gre.h:165
void gre_update_adj(vnet_main_t *vnm, u32 sw_if_index, adj_index_t ai)
Definition: gre.c:310
u32 outer_table_id
Definition: gre.api:58
ip6_main_t ip6_main
Definition: ip6_forward.c:2703
vl_api_address_t dst
Definition: gre.api:61
gre_tunnel_mode_t mode
Definition: gre.h:366
vlib_main_t * vm
Definition: in2out_ed.c:1810
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:172
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:531
u32 nhrp_entry_get_fib_index(const nhrp_entry_t *ne)
Definition: nhrp.c:56
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P with alignment A.
Definition: pool.h:231
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:695
gre_tunnel_type_t type
Definition: gre.h:217
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
u32 flags
Definition: vhost_user.h:141
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:236
gre_tunnel_key6_t gtk_v6
Definition: gre.h:166
Used for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:177
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 the neighbour Adjacencies on a given interface.
Definition: adj_nbr.c:588
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:369
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:152
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:450
gre_tunnel_type_t type
Definition: gre.h:365
void ethernet_delete_interface(vnet_main_t *vnm, u32 hw_if_index)
Definition: interface.c:378
nhrp_entry_added_t nv_added
Definition: nhrp.h:67
#define ASSERT(truth)
u16 session_id
Definition: gre.api:56
int vnet_gre_tunnel_add_del(vnet_gre_tunnel_add_del_args_t *a, u32 *sw_if_indexp)
Definition: interface.c:505
manual_print typedef address
Definition: ip_types.api:84
gre_tunnel_t * tunnels
pool of tunnel instances
Definition: gre.h:257
IPv4 main type.
Definition: ip4.h:105
static void clib_mem_free(void *p)
Definition: mem.h:226
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:591
#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:163
static void * clib_mem_alloc(uword size)
Definition: mem.h:153
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:240
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:974
typedef key
Definition: ipsec_types.api:83
enum gre_tunnel_mode_t_ gre_tunnel_mode_t
vnet_device_class_t gre_device_class
void nhrp_walk_itf(u32 sw_if_index, nhrp_walk_cb_t fn, void *ctx)
Definition: nhrp.c:233
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u32 instance
Definition: gre.api:57
#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:492
const fib_prefix_t * nhrp_entry_get_nh(const nhrp_entry_t *ne)
Definition: nhrp.c:68
u64 uword
Definition: types.h:112
u32 ref_count
Definition: gre.h:180
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:664
#define FOR_EACH_FIB_IP_PROTOCOL(_item)
Definition: fib_types.h:70
#define hash_get_mem(h, key)
Definition: hash.h:269
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1079
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:501
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:210
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:218
static void gre_nhrp_entry_deleted(const nhrp_entry_t *ne)
Definition: interface.c:248
void nhrp_register(const nhrp_vft_t *vft)
Definition: nhrp.c:247
u32 nhrp_entry_get_sw_if_index(const nhrp_entry_t *ne)
accessors for the opaque struct
Definition: nhrp.c:50
vlib_main_t * vlib_main
Definition: gre.h:294
static void hash_set_mem_alloc(uword **h, const void *key, uword v)
Definition: hash.h:279
#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:487
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:689
u32 * fib_index_by_sw_if_index
Definition: ip6.h:195
gre_main_t gre_main
Definition: gre.c:26
u16 session_id
ERSPAN type 2 session ID, least significant 10 bits of u16.
Definition: gre.h:228
static void gre_mk_sn_key(const gre_tunnel_t *gt, gre_sn_key_t *key)
Definition: gre.h:425
#define ip46_address_initializer
Definition: ip46_address.h:52
const ip46_address_t zero_addr
Definition: lookup.c:307
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
u8 is_ipv6
Definition: acl_types.api:38
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128