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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 
30 
31 static u8 *
32 format_gre_tunnel (u8 * s, va_list * args)
33 {
34  gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *);
35 
36  s = format (s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ",
41 
42  s = format (s, "payload %s ", gre_tunnel_type_names[t->type]);
43 
44  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
45  s = format (s, "session %d ", t->session_id);
46 
47  if (t->type != GRE_TUNNEL_TYPE_L3)
48  s = format (s, "l2-adj-idx %d ", t->l2_adj_index);
49 
50  return s;
51 }
52 
53 static gre_tunnel_t *
55  u32 outer_fib_index, gre_tunnel_key_t * key)
56 {
58  uword *p;
59 
60  if (!a->is_ipv6)
61  {
62  gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index,
63  a->type, a->session_id, &key->gtk_v4);
64  p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
65  }
66  else
67  {
68  gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index,
69  a->type, a->session_id, &key->gtk_v6);
70  p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6);
71  }
72 
73  if (NULL == p)
74  return (NULL);
75 
76  return (pool_elt_at_index (gm->tunnels, p[0]));
77 }
78 
79 static void
81 {
83 
84  t->key = clib_mem_alloc (sizeof (*t->key));
85  clib_memcpy (t->key, key, sizeof (*key));
86 
88  {
90  }
91  else
92  {
94  }
95 }
96 
97 static void
99 {
100  gre_main_t *gm = &gre_main;
101 
103  {
105  }
106  else
107  {
109  }
110 
111  clib_mem_free (t->key);
112  t->key = NULL;
113 }
114 
115 /**
116  * gre_tunnel_stack
117  *
118  * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
119  */
120 void
122 {
123  gre_main_t *gm = &gre_main;
124  ip_adjacency_t *adj;
125  gre_tunnel_t *gt;
127 
128  adj = adj_get (ai);
129  sw_if_index = adj->rewrite_header.sw_if_index;
130 
131  if ((vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index) ||
132  (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
133  return;
134 
135  gt = pool_elt_at_index (gm->tunnels,
136  gm->tunnel_index_by_sw_if_index[sw_if_index]);
137 
140  {
142  }
143  else
144  {
146  }
147 }
148 
149 /**
150  * @brief Call back when restacking all adjacencies on a GRE interface
151  */
152 static adj_walk_rc_t
154 {
155  gre_tunnel_stack (ai);
156 
157  return (ADJ_WALK_RC_CONTINUE);
158 }
159 
160 static void
162 {
164 
165  /*
166  * walk all the adjacencies on th GRE interface and restack them
167  */
169  {
171  }
172 }
173 
174 static int
176  u32 outer_fib_index, u32 * sw_if_indexp)
177 {
178  gre_main_t *gm = &gre_main;
179  vnet_main_t *vnm = gm->vnet_main;
180  ip4_main_t *im4 = &ip4_main;
181  ip6_main_t *im6 = &ip6_main;
182  gre_tunnel_t *t;
184  u32 hw_if_index, sw_if_index;
185  clib_error_t *error;
186  u8 is_ipv6 = a->is_ipv6;
188 
189  t = gre_tunnel_db_find (a, outer_fib_index, &key);
190  if (NULL != t)
191  return VNET_API_ERROR_IF_ALREADY_EXISTS;
192 
194  clib_memset (t, 0, sizeof (*t));
195 
196  /* Reconcile the real dev_instance and a possible requested instance */
197  u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
198  u32 u_idx = a->instance; /* user specified instance */
199  if (u_idx == ~0)
200  u_idx = t_idx;
201  if (hash_get (gm->instance_used, u_idx))
202  {
203  pool_put (gm->tunnels, t);
204  return VNET_API_ERROR_INSTANCE_IN_USE;
205  }
206  hash_set (gm->instance_used, u_idx, 1);
207 
208  t->dev_instance = t_idx; /* actual */
209  t->user_instance = u_idx; /* name */
210 
211  t->type = a->type;
212  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
213  t->session_id = a->session_id;
214 
215  if (t->type == GRE_TUNNEL_TYPE_L3)
216  hw_if_index = vnet_register_interface (vnm, gre_device_class.index, t_idx,
218  t_idx);
219  else
220  {
221  /* Default MAC address (d00b:eed0:0000 + sw_if_index) */
222  u8 address[6] =
223  { 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx };
224  error =
226  address, &hw_if_index, 0);
227  if (error)
228  {
229  clib_error_report (error);
230  return VNET_API_ERROR_INVALID_REGISTRATION;
231  }
232  }
233 
234  /* Set GRE tunnel interface output node (not used for L3 payload) */
235  vnet_set_interface_output_node (vnm, hw_if_index, gre_encap_node.index);
236 
237  hi = vnet_get_hw_interface (vnm, hw_if_index);
238  sw_if_index = hi->sw_if_index;
239 
240  t->hw_if_index = hw_if_index;
241  t->outer_fib_index = outer_fib_index;
244 
247 
248  if (!is_ipv6)
249  {
250  vec_validate (im4->fib_index_by_sw_if_index, sw_if_index);
251  hi->min_packet_bytes =
252  64 + sizeof (gre_header_t) + sizeof (ip4_header_t);
253  }
254  else
255  {
256  vec_validate (im6->fib_index_by_sw_if_index, sw_if_index);
257  hi->min_packet_bytes =
258  64 + sizeof (gre_header_t) + sizeof (ip6_header_t);
259  }
260 
261  /* Standard default gre MTU. */
262  vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
263 
264  /*
265  * source the FIB entry for the tunnel's destination
266  * and become a child thereof. The tunnel will then get poked
267  * when the forwarding for the entry updates, and the tunnel can
268  * re-stack accordingly
269  */
270 
271  clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
272  t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128;
274  t->tunnel_dst.fp_addr = a->dst;
275 
276  gre_tunnel_db_add (t, &key);
277  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
278  {
279  gre_sn_key_t skey;
280  gre_sn_t *gre_sn;
281 
282  gre_mk_sn_key (t, &skey);
283  gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey);
284  if (gre_sn != NULL)
285  {
286  gre_sn->ref_count++;
287  t->gre_sn = gre_sn;
288  }
289  else
290  {
291  gre_sn = clib_mem_alloc (sizeof (gre_sn_t));
292  gre_sn->seq_num = 0;
293  gre_sn->ref_count = 1;
294  t->gre_sn = gre_sn;
295  hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn);
296  }
297  }
298 
299  if (t->type != GRE_TUNNEL_TYPE_L3)
300  {
302  (t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index);
304  }
305 
306  if (sw_if_indexp)
307  *sw_if_indexp = sw_if_index;
308 
309  /* register gre46-input nodes */
310  ip4_register_protocol (IP_PROTOCOL_GRE, gre4_input_node.index);
311  ip6_register_protocol (IP_PROTOCOL_GRE, gre6_input_node.index);
312 
313  return 0;
314 }
315 
316 static int
318  u32 outer_fib_index, u32 * sw_if_indexp)
319 {
320  gre_main_t *gm = &gre_main;
321  vnet_main_t *vnm = gm->vnet_main;
322  gre_tunnel_t *t;
325 
326  t = gre_tunnel_db_find (a, outer_fib_index, &key);
327  if (NULL == t)
328  return VNET_API_ERROR_NO_SUCH_ENTRY;
329 
330  sw_if_index = t->sw_if_index;
331  vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
332 
333  /* make sure tunnel is removed from l2 bd or xconnect */
334  set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0,
335  L2_BD_PORT_TYPE_NORMAL, 0, 0);
337 
338  if (t->type == GRE_TUNNEL_TYPE_L3)
340  else
342 
344  {
347  }
348 
349  ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL));
350  if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1))
351  {
352  gre_sn_key_t skey;
353  gre_mk_sn_key (t, &skey);
354  hash_unset_mem_free (&gm->seq_num_by_key, &skey);
355  clib_mem_free (t->gre_sn);
356  }
357 
360  pool_put (gm->tunnels, t);
361 
362  if (sw_if_indexp)
363  *sw_if_indexp = sw_if_index;
364 
365  return 0;
366 }
367 
368 int
370  u32 * sw_if_indexp)
371 {
372  u32 outer_fib_index;
373 
374  if (!a->is_ipv6)
375  outer_fib_index = ip4_fib_index_from_table_id (a->outer_fib_id);
376  else
377  outer_fib_index = ip6_fib_index_from_table_id (a->outer_fib_id);
378 
379  if (~0 == outer_fib_index)
380  return VNET_API_ERROR_NO_SUCH_FIB;
381 
383  return VNET_API_ERROR_INVALID_SESSION_ID;
384 
385  if (a->is_add)
386  return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp));
387  else
388  return (vnet_gre_tunnel_delete (a, outer_fib_index, sw_if_indexp));
389 }
390 
391 clib_error_t *
393 {
394  gre_main_t *gm = &gre_main;
396  gre_tunnel_t *t;
397  u32 ti;
398 
399  hi = vnet_get_hw_interface (vnm, hw_if_index);
400 
401  if (NULL == gm->tunnel_index_by_sw_if_index ||
403  return (NULL);
404 
406 
407  if (~0 == ti)
408  /* not one of ours */
409  return (NULL);
410 
411  t = pool_elt_at_index (gm->tunnels, ti);
412 
414  vnet_hw_interface_set_flags (vnm, hw_if_index,
416  else
417  vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
418 
419  gre_tunnel_restack (t);
420 
421  return /* no error */ 0;
422 }
423 
424 static clib_error_t *
426  unformat_input_t * input,
427  vlib_cli_command_t * cmd)
428 {
429  unformat_input_t _line_input, *line_input = &_line_input;
431  ip46_address_t src, dst;
432  u32 instance = ~0;
433  u32 outer_fib_id = 0;
435  u32 session_id = 0;
436  int rv;
437  u32 num_m_args = 0;
438  u8 is_add = 1;
440  clib_error_t *error = NULL;
441  u8 ipv4_set = 0;
442  u8 ipv6_set = 0;
443 
444  /* Get a line of input. */
445  if (!unformat_user (input, unformat_line_input, line_input))
446  return 0;
447 
448  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
449  {
450  if (unformat (line_input, "del"))
451  is_add = 0;
452  else if (unformat (line_input, "instance %d", &instance))
453  ;
454  else
455  if (unformat (line_input, "src %U", unformat_ip4_address, &src.ip4))
456  {
457  num_m_args++;
458  ipv4_set = 1;
459  }
460  else
461  if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4))
462  {
463  num_m_args++;
464  ipv4_set = 1;
465  }
466  else
467  if (unformat (line_input, "src %U", unformat_ip6_address, &src.ip6))
468  {
469  num_m_args++;
470  ipv6_set = 1;
471  }
472  else
473  if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6))
474  {
475  num_m_args++;
476  ipv6_set = 1;
477  }
478  else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id))
479  ;
480  else if (unformat (line_input, "teb"))
481  t_type = GRE_TUNNEL_TYPE_TEB;
482  else if (unformat (line_input, "erspan %d", &session_id))
483  t_type = GRE_TUNNEL_TYPE_ERSPAN;
484  else
485  {
486  error = clib_error_return (0, "unknown input `%U'",
487  format_unformat_error, line_input);
488  goto done;
489  }
490  }
491 
492  if (num_m_args < 2)
493  {
494  error = clib_error_return (0, "mandatory argument(s) missing");
495  goto done;
496  }
497 
498  if ((ipv4_set && memcmp (&src.ip4, &dst.ip4, sizeof (src.ip4)) == 0) ||
499  (ipv6_set && memcmp (&src.ip6, &dst.ip6, sizeof (src.ip6)) == 0))
500  {
501  error = clib_error_return (0, "src and dst are identical");
502  goto done;
503  }
504 
505  if (ipv4_set && ipv6_set)
506  return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
507 
508  if ((ipv4_set && memcmp (&dst.ip4, &zero_addr.ip4, sizeof (dst.ip4)) == 0)
509  || (ipv6_set
510  && memcmp (&dst.ip6, &zero_addr.ip6, sizeof (dst.ip6)) == 0))
511  {
512  error = clib_error_return (0, "dst address cannot be zero");
513  goto done;
514  }
515 
516  clib_memset (a, 0, sizeof (*a));
517  a->is_add = is_add;
519  a->type = t_type;
520  a->session_id = session_id;
521  a->is_ipv6 = ipv6_set;
522  a->instance = instance;
523  if (!ipv6_set)
524  {
525  clib_memcpy (&a->src.ip4, &src.ip4, sizeof (src.ip4));
526  clib_memcpy (&a->dst.ip4, &dst.ip4, sizeof (dst.ip4));
527  }
528  else
529  {
530  clib_memcpy (&a->src.ip6, &src.ip6, sizeof (src.ip6));
531  clib_memcpy (&a->dst.ip6, &dst.ip6, sizeof (dst.ip6));
532  }
533 
534  rv = vnet_gre_tunnel_add_del (a, &sw_if_index);
535 
536  switch (rv)
537  {
538  case 0:
540  vnet_get_main (), sw_if_index);
541  break;
542  case VNET_API_ERROR_IF_ALREADY_EXISTS:
543  error = clib_error_return (0, "GRE tunnel already exists...");
544  goto done;
545  case VNET_API_ERROR_NO_SUCH_FIB:
546  error = clib_error_return (0, "outer fib ID %d doesn't exist\n",
547  outer_fib_id);
548  goto done;
549  case VNET_API_ERROR_NO_SUCH_ENTRY:
550  error = clib_error_return (0, "GRE tunnel doesn't exist");
551  goto done;
552  case VNET_API_ERROR_INVALID_SESSION_ID:
553  error = clib_error_return (0, "session ID %d out of range\n",
554  session_id);
555  goto done;
556  case VNET_API_ERROR_INSTANCE_IN_USE:
557  error = clib_error_return (0, "Instance is in use");
558  goto done;
559  default:
560  error =
561  clib_error_return (0, "vnet_gre_tunnel_add_del returned %d", rv);
562  goto done;
563  }
564 
565 done:
566  unformat_free (line_input);
567 
568  return error;
569 }
570 
571 /* *INDENT-OFF* */
572 VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {
573  .path = "create gre tunnel",
574  .short_help = "create gre tunnel src <addr> dst <addr> [instance <n>] "
575  "[outer-fib-id <fib>] [teb | erspan <session-id>] [del]",
576  .function = create_gre_tunnel_command_fn,
577 };
578 /* *INDENT-ON* */
579 
580 static clib_error_t *
582  unformat_input_t * input,
583  vlib_cli_command_t * cmd)
584 {
585  gre_main_t *gm = &gre_main;
586  gre_tunnel_t *t;
587  u32 ti = ~0;
588 
589  if (pool_elts (gm->tunnels) == 0)
590  vlib_cli_output (vm, "No GRE tunnels configured...");
591 
593  {
594  if (unformat (input, "%d", &ti))
595  ;
596  else
597  break;
598  }
599 
600  if (~0 == ti)
601  {
602  /* *INDENT-OFF* */
603  pool_foreach (t, gm->tunnels,
604  ({
605  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
606  }));
607  /* *INDENT-ON* */
608  }
609  else
610  {
611  t = pool_elt_at_index (gm->tunnels, ti);
612 
613  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
614  }
615 
616  return 0;
617 }
618 
619 /* *INDENT-OFF* */
620 VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = {
621  .path = "show gre tunnel",
622  .function = show_gre_tunnel_command_fn,
623 };
624 /* *INDENT-ON* */
625 
626 /* force inclusion from application's main.c */
627 clib_error_t *
629 {
630  return (NULL);
631 }
632 
634 
635 /*
636  * fd.io coding-style-patch-verification: ON
637  *
638  * Local Variables:
639  * eval: (c-set-style "gnu")
640  * End:
641  */
vnet_main_t * vnet_main
Definition: gre.h:280
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
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:267
void gre_tunnel_stack(adj_index_t ai)
gre_tunnel_stack
Definition: interface.c:121
vmrglw vmrglh hi
static void gre_tunnel_db_add(gre_tunnel_t *t, gre_tunnel_key_t *key)
Definition: interface.c:80
typedef address
Definition: ip_types.api:83
vlib_node_registration_t gre4_input_node
(constructor) VLIB_REGISTER_NODE (gre4_input_node)
Definition: node.c:453
#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:262
GRE related global data.
Definition: gre.h:237
u32 flags
Definition: vhost_user.h:141
u32 hw_if_index
Definition: gre.h:201
#define hash_unset(h, key)
Definition: hash.h:261
a
Definition: bitmap.h:538
Transparent Ethernet Bridging - the tunnel is in L2 mode.
Definition: gre.h:50
void ip6_register_protocol(u32 protocol, u32 node_index)
Definition: ip6_forward.c:1447
static u8 * format_gre_tunnel(u8 *s, va_list *args)
Definition: interface.c:32
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
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:54
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:161
#define NULL
Definition: clib.h:58
IP unicast adjacency.
Definition: adj.h:221
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:200
vl_api_address_t src
Definition: gre.api:51
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:153
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:989
format_function_t format_ip46_address
Definition: format.h:61
#define hash_set_mem(h, key, value)
Definition: hash.h:275
clib_memset(h->entries, 0, sizeof(h->entries[0])*entries)
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:278
void ip4_register_protocol(u32 protocol, u32 node_index)
Definition: ip4_forward.c:1748
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:175
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:272
#define clib_memcpy(d, s, n)
Definition: string.h:180
u32 seq_num
Definition: gre.h:159
static void gre_tunnel_db_remove(gre_tunnel_t *t)
Definition: interface.c:98
Hash key for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:166
enum gre_tunnel_type_t_ gre_tunnel_type_t
The GRE tunnel type.
static ip_adjacency_t * adj_get(adj_index_t adj_index)
Get a pointer to an adjacency object from its index.
Definition: adj.h:433
u32 sw_if_index
Definition: gre.h:202
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:493
unformat_function_t unformat_ip4_address
Definition: format.h:70
u32 dev_instance
Definition: gre.h:224
vl_api_interface_index_t sw_if_index
Definition: gre.api:50
#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
clib_error_t * gre_interface_init(vlib_main_t *vm)
Definition: interface.c:628
#define clib_error_return(e, args...)
Definition: error.h:99
ip46_address_t src
Definition: gre.h:353
void adj_unlock(adj_index_t adj_index)
Release a reference counting lock on the adjacency.
Definition: adj.c:318
unsigned int u32
Definition: types.h:88
adj_index_t l2_adj_index
an L2 tunnel always rquires an L2 midchain.
Definition: gre.h:208
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:192
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:761
#define GRE_TUNNEL_TYPE_NAMES
Definition: gre.h:62
unformat_function_t unformat_line_input
Definition: format.h:283
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:425
#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:257
#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:514
A representation of a GRE tunnel.
Definition: gre.h:176
#define hash_unset_mem(h, key)
Definition: hash.h:291
vlib_node_registration_t gre_encap_node
(constructor) VLIB_REGISTER_NODE (gre_encap_node)
Definition: gre.c:493
uword * instance_used
Definition: gre.h:283
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:1217
long ctx[MAX_CONNS]
Definition: main.c:144
static u32 ip6_fib_index_from_table_id(u32 table_id)
Definition: ip6_fib.h:173
struct _unformat_input_t unformat_input_t
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:286
gre_tunnel_key4_t gtk_v4
Definition: gre.h:150
void gre_update_adj(vnet_main_t *vnm, u32 sw_if_index, adj_index_t ai)
Definition: gre.c:307
vl_api_address_t dst
Definition: gre.api:52
#define GTK_SESSION_ID_MAX
Definition: gre.h:143
clib_error_t * gre_interface_admin_up_down(vnet_main_t *vnm, u32 hw_if_index, u32 flags)
Definition: interface.c:392
unformat_function_t unformat_ip6_address
Definition: format.h:91
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P with alignment A.
Definition: pool.h:230
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:581
gre_tunnel_type_t type
Definition: gre.h:203
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
vlib_main_t * vm
Definition: buffer.c:312
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:221
gre_tunnel_key6_t gtk_v6
Definition: gre.h:151
static void gre_mk_key4(ip4_address_t src, ip4_address_t dst, u32 fib_index, u8 ttype, u16 session_id, gre_tunnel_key4_t *key)
Definition: gre.h:362
Used for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:157
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:574
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:353
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:155
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:317
gre_tunnel_type_t type
Definition: gre.h:350
void ethernet_delete_interface(vnet_main_t *vnm, u32 hw_if_index)
Definition: interface.c:324
#define ASSERT(truth)
u16 session_id
Definition: gre.api:46
int vnet_gre_tunnel_add_del(vnet_gre_tunnel_add_del_args_t *a, u32 *sw_if_indexp)
Definition: interface.c:369
ip6_main_t ip6_main
Definition: ip6_forward.c:2671
gre_tunnel_t * tunnels
pool of tunnel instances
Definition: gre.h:242
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
Union of the two possible key types.
Definition: gre.h:148
static void * clib_mem_alloc(uword size)
Definition: mem.h:153
vnet_hw_interface_class_t gre_hw_interface_class
u32 user_instance
Definition: gre.h:225
static void gre_mk_key6(const ip6_address_t *src, const ip6_address_t *dst, u32 fib_index, u8 ttype, u16 session_id, gre_tunnel_key6_t *key)
Definition: gre.h:381
void vnet_delete_hw_interface(vnet_main_t *vnm, u32 hw_if_index)
Definition: interface.c:972
u32 outer_fib_id
Definition: gre.api:49
vnet_device_class_t gre_device_class
ERSPAN type 2 - the tunnel is for port mirror SPAN output.
Definition: gre.h:57
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
L3 GRE (i.e.
Definition: gre.h:46
u32 instance
Definition: gre.api:48
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:501
u64 uword
Definition: types.h:112
u32 ref_count
Definition: gre.h:160
static void unformat_free(unformat_input_t *i)
Definition: format.h:163
static void hash_set_mem_alloc(uword **h, void *key, uword v)
Definition: hash.h:279
typedef key
Definition: ipsec.api:245
void vnet_sw_interface_set_mtu(vnet_main_t *vnm, u32 sw_if_index, u32 mtu)
Definition: interface.c:663
#define FOR_EACH_FIB_IP_PROTOCOL(_item)
Definition: fib_types.h:70
#define hash_get_mem(h, key)
Definition: hash.h:269
static void hash_unset_mem_free(uword **h, void *key)
Definition: hash.h:295
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
gre_tunnel_key_t * key
The hash table&#39;s key stored in separate memory since the tunnel_t memory can realloc.
Definition: gre.h:187
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:921
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:510
vlib_node_registration_t gre6_input_node
(constructor) VLIB_REGISTER_NODE (gre6_input_node)
Definition: node.c:473
fib_prefix_t tunnel_dst
The tunnel&#39;s destination/remote address.
Definition: gre.h:196
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
vlib_main_t * vlib_main
Definition: gre.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:486
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:768
u32 * fib_index_by_sw_if_index
Definition: ip6.h:194
gre_main_t gre_main
Definition: gre.c:25
u16 session_id
ERSPAN type 2 session ID, least significant 10 bits of u16.
Definition: gre.h:213
static void gre_mk_sn_key(const gre_tunnel_t *gt, gre_sn_key_t *key)
Definition: gre.h:403
static const char * gre_tunnel_type_names[]
Definition: interface.c:29
const ip46_address_t zero_addr
Definition: lookup.c:319
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
vl_api_fib_path_nh_proto_t proto
Definition: fib_types.api:125
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171
#define MODE_L3
Definition: l2_input.h:219
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128