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Vector Packet Processing
gre.c
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1 /*
2  * gre.c: gre
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/gre/gre.h>
20 #include <vnet/adj/adj_midchain.h>
21 #include <vnet/nhrp/nhrp.h>
22 
23 extern gre_main_t gre_main;
24 
25 #ifndef CLIB_MARCH_VARIANT
27 
28 typedef struct
29 {
30  union
31  {
32  ip4_and_gre_header_t ip4_and_gre;
33  u64 as_u64[3];
34  };
36 
37 typedef struct
38 {
39  union
40  {
41  ip6_and_gre_header_t ip6_and_gre;
42  u64 as_u64[3];
43  };
45 #endif /* CLIB_MARCH_VARIANT */
46 
47 
48 /* Packet trace structure */
49 typedef struct
50 {
51  /* Tunnel-id / index in tunnel vector */
53 
54  /* pkt length */
56 
57  /* tunnel ip addresses */
58  ip46_address_t src;
59  ip46_address_t dst;
61 
62 extern u8 *format_gre_tx_trace (u8 * s, va_list * args);
63 
64 #ifndef CLIB_MARCH_VARIANT
65 u8 *
66 format_gre_tx_trace (u8 * s, va_list * args)
67 {
68  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
69  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
70  gre_tx_trace_t *t = va_arg (*args, gre_tx_trace_t *);
71 
72  s = format (s, "GRE: tunnel %d len %d src %U dst %U",
73  t->tunnel_id, t->length,
76  return s;
77 }
78 
79 u8 *
80 format_gre_protocol (u8 * s, va_list * args)
81 {
82  gre_protocol_t p = va_arg (*args, u32);
85 
86  if (pi)
87  s = format (s, "%s", pi->name);
88  else
89  s = format (s, "0x%04x", p);
90 
91  return s;
92 }
93 
94 u8 *
95 format_gre_header_with_length (u8 * s, va_list * args)
96 {
98  gre_header_t *h = va_arg (*args, gre_header_t *);
99  u32 max_header_bytes = va_arg (*args, u32);
100  gre_protocol_t p = clib_net_to_host_u16 (h->protocol);
101  u32 indent, header_bytes;
102 
103  header_bytes = sizeof (h[0]);
104  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
105  return format (s, "gre header truncated");
106 
107  indent = format_get_indent (s);
108 
109  s = format (s, "GRE %U", format_gre_protocol, p);
110 
111  if (max_header_bytes != 0 && header_bytes < max_header_bytes)
112  {
115  if (node->format_buffer)
116  s = format (s, "\n%U%U",
117  format_white_space, indent,
118  node->format_buffer, (void *) (h + 1),
119  max_header_bytes - header_bytes);
120  }
121 
122  return s;
123 }
124 
125 u8 *
126 format_gre_header (u8 * s, va_list * args)
127 {
128  gre_header_t *h = va_arg (*args, gre_header_t *);
129  return format (s, "%U", format_gre_header_with_length, h, 0);
130 }
131 
132 /* Returns gre protocol as an int in host byte order. */
133 uword
135  va_list * args)
136 {
137  u16 *result = va_arg (*args, u16 *);
138  gre_main_t *gm = &gre_main;
139  int i;
140 
141  /* Named type. */
143  gm->protocol_info_by_name, &i))
144  {
146  *result = pi->protocol;
147  return 1;
148  }
149 
150  return 0;
151 }
152 
153 uword
155  va_list * args)
156 {
157  u16 *result = va_arg (*args, u16 *);
159  return 0;
160  *result = clib_host_to_net_u16 ((u16) * result);
161  return 1;
162 }
163 
164 uword
165 unformat_gre_header (unformat_input_t * input, va_list * args)
166 {
167  u8 **result = va_arg (*args, u8 **);
168  gre_header_t _h, *h = &_h;
169  u16 p;
170 
171  if (!unformat (input, "%U", unformat_gre_protocol_host_byte_order, &p))
172  return 0;
173 
174  h->protocol = clib_host_to_net_u16 (p);
175 
176  /* Add header to result. */
177  {
178  void *p;
179  u32 n_bytes = sizeof (h[0]);
180 
181  vec_add2 (*result, p, n_bytes);
182  clib_memcpy (p, h, n_bytes);
183  }
184 
185  return 1;
186 }
187 
188 static int
190 {
191  switch (link)
192  {
193  case VNET_LINK_IP4:
194  return (GRE_PROTOCOL_ip4);
195  case VNET_LINK_IP6:
196  return (GRE_PROTOCOL_ip6);
197  case VNET_LINK_MPLS:
198  return (GRE_PROTOCOL_mpls_unicast);
199  case VNET_LINK_ETHERNET:
200  return (GRE_PROTOCOL_teb);
201  case VNET_LINK_ARP:
202  return (GRE_PROTOCOL_arp);
203  case VNET_LINK_NSH:
204  ASSERT (0);
205  break;
206  }
207  ASSERT (0);
208  return (GRE_PROTOCOL_ip4);
209 }
210 
211 static u8 *
214  vnet_link_t link_type, const void *dst_address)
215 {
216  gre_main_t *gm = &gre_main;
217  const ip46_address_t *dst;
218  ip4_and_gre_header_t *h4;
219  ip6_and_gre_header_t *h6;
220  gre_header_t *gre;
221  u8 *rewrite = NULL;
222  gre_tunnel_t *t;
223  u32 ti;
224  u8 is_ipv6;
225 
226  dst = dst_address;
228 
229  if (~0 == ti)
230  /* not one of ours */
231  return (0);
232 
233  t = pool_elt_at_index (gm->tunnels, ti);
234 
235  is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
236 
237  if (!is_ipv6)
238  {
239  vec_validate (rewrite, sizeof (*h4) - 1);
240  h4 = (ip4_and_gre_header_t *) rewrite;
241  gre = &h4->gre;
242  h4->ip4.ip_version_and_header_length = 0x45;
243  h4->ip4.ttl = 254;
244  h4->ip4.protocol = IP_PROTOCOL_GRE;
245  /* fixup ip4 header length and checksum after-the-fact */
246  h4->ip4.src_address.as_u32 = t->tunnel_src.ip4.as_u32;
247  h4->ip4.dst_address.as_u32 = dst->ip4.as_u32;
248  h4->ip4.checksum = ip4_header_checksum (&h4->ip4);
249  }
250  else
251  {
252  vec_validate (rewrite, sizeof (*h6) - 1);
253  h6 = (ip6_and_gre_header_t *) rewrite;
254  gre = &h6->gre;
255  h6->ip6.ip_version_traffic_class_and_flow_label =
256  clib_host_to_net_u32 (6 << 28);
257  h6->ip6.hop_limit = 255;
258  h6->ip6.protocol = IP_PROTOCOL_GRE;
259  /* fixup ip6 header length and checksum after-the-fact */
260  h6->ip6.src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0];
261  h6->ip6.src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1];
262  h6->ip6.dst_address.as_u64[0] = dst->ip6.as_u64[0];
263  h6->ip6.dst_address.as_u64[1] = dst->ip6.as_u64[1];
264  }
265 
266  if (PREDICT_FALSE (t->type == GRE_TUNNEL_TYPE_ERSPAN))
267  {
268  gre->protocol = clib_host_to_net_u16 (GRE_PROTOCOL_erspan);
269  gre->flags_and_version = clib_host_to_net_u16 (GRE_FLAGS_SEQUENCE);
270  }
271  else
272  gre->protocol =
273  clib_host_to_net_u16 (gre_proto_from_vnet_link (link_type));
274 
275  return (rewrite);
276 }
277 
278 #define is_v4_packet(_h) ((*(u8*) _h) & 0xF0) == 0x40
279 
280 static void
282  const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
283 {
284  ip4_header_t *ip0;
285 
286  ip0 = vlib_buffer_get_current (b0);
287 
288  /* Fixup the checksum and len fields in the GRE tunnel encap
289  * that was applied at the midchain node */
290  ip0->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
291  ip0->checksum = ip4_header_checksum (ip0);
292 }
293 
294 static void
296  const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
297 {
298  ip6_header_t *ip0;
299 
300  ip0 = vlib_buffer_get_current (b0);
301 
302  /* Fixup the payload length field in the GRE tunnel encap that was applied
303  * at the midchain node */
304  ip0->payload_length =
305  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
306  sizeof (*ip0));
307 }
308 
309 void
311 {
312  gre_main_t *gm = &gre_main;
313  gre_tunnel_t *t;
314  adj_flags_t af;
315  u8 is_ipv6;
316  u32 ti;
317 
319  t = pool_elt_at_index (gm->tunnels, ti);
320  is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
322 
325 
327  (ai, !is_ipv6 ? gre4_fixup : gre6_fixup, NULL, af,
328  gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai),
329  &t->tunnel_dst.fp_addr));
330 
331  gre_tunnel_stack (ai);
332 }
333 
334 static adj_walk_rc_t
336 {
337  nhrp_entry_adj_stack (ctx, ai);
338 
339  return (ADJ_WALK_RC_CONTINUE);
340 }
341 
342 void
344 {
345  gre_main_t *gm = &gre_main;
346  ip_adjacency_t *adj;
347  nhrp_entry_t *ne;
348  gre_tunnel_t *t;
349  adj_flags_t af;
350  u8 is_ipv6;
351  u32 ti;
352 
353  adj = adj_get (ai);
355  t = pool_elt_at_index (gm->tunnels, ti);
356  is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
358 
360  (ai, !is_ipv6 ? gre4_fixup : gre6_fixup, NULL, af,
361  gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai),
362  &adj->sub_type.nbr.next_hop));
363 
364  ne = nhrp_entry_find (sw_if_index, &adj->sub_type.nbr.next_hop);
365 
366  if (NULL == ne)
367  // no NHRP entry to provide the next-hop
368  return;
369 
370  adj_nbr_walk_nh (sw_if_index, t->tunnel_dst.fp_proto,
371  &adj->sub_type.nbr.next_hop, mgre_mk_complete_walk, ne);
372 }
373 #endif /* CLIB_MARCH_VARIANT */
374 
375 typedef enum
376 {
380 
381 /**
382  * @brief TX function. Only called for L2 payload including TEB or ERSPAN.
383  * L3 traffic uses the adj-midchains.
384  */
387 {
388  gre_main_t *gm = &gre_main;
389  u32 *from, n_left_from;
390  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
391  u32 sw_if_index[2] = { ~0, ~0 };
392  const gre_tunnel_t *gt[2] = { 0 };
393  adj_index_t adj_index[2] = { ADJ_INDEX_INVALID, ADJ_INDEX_INVALID };
394 
395  from = vlib_frame_vector_args (frame);
396  n_left_from = frame->n_vectors;
397  vlib_get_buffers (vm, from, bufs, n_left_from);
398 
399  while (n_left_from >= 2)
400  {
401 
402  if (PREDICT_FALSE
403  (sw_if_index[0] != vnet_buffer (b[0])->sw_if_index[VLIB_TX]))
404  {
405  const vnet_hw_interface_t *hi;
406  sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
407  hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[0]);
408  gt[0] = &gm->tunnels[hi->dev_instance];
409  adj_index[0] = gt[0]->l2_adj_index;
410  }
411  if (PREDICT_FALSE
412  (sw_if_index[1] != vnet_buffer (b[1])->sw_if_index[VLIB_TX]))
413  {
414  const vnet_hw_interface_t *hi;
415  sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
416  hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[1]);
417  gt[1] = &gm->tunnels[hi->dev_instance];
418  adj_index[1] = gt[1]->l2_adj_index;
419  }
420 
421  vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = adj_index[0];
422  vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = adj_index[1];
423 
424  if (PREDICT_FALSE (gt[0]->type == GRE_TUNNEL_TYPE_ERSPAN))
425  {
426  /* Encap GRE seq# and ERSPAN type II header */
427  erspan_t2_t *h0;
428  u32 seq_num;
429  u64 hdr;
430  vlib_buffer_advance (b[0], -sizeof (erspan_t2_t));
431  h0 = vlib_buffer_get_current (b[0]);
432  seq_num = clib_atomic_fetch_add (&gt[0]->gre_sn->seq_num, 1);
433  hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
434  h0->seq_num = clib_host_to_net_u32 (seq_num);
435  h0->t2_u64 = hdr;
436  h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[0]->session_id);
437  }
438  if (PREDICT_FALSE (gt[1]->type == GRE_TUNNEL_TYPE_ERSPAN))
439  {
440  /* Encap GRE seq# and ERSPAN type II header */
441  erspan_t2_t *h0;
442  u32 seq_num;
443  u64 hdr;
444  vlib_buffer_advance (b[1], -sizeof (erspan_t2_t));
445  h0 = vlib_buffer_get_current (b[1]);
446  seq_num = clib_atomic_fetch_add (&gt[1]->gre_sn->seq_num, 1);
447  hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
448  h0->seq_num = clib_host_to_net_u32 (seq_num);
449  h0->t2_u64 = hdr;
450  h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[1]->session_id);
451  }
452 
453  if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
454  {
456  b[0], sizeof (*tr));
457  tr->tunnel_id = gt[0] - gm->tunnels;
458  tr->src = gt[0]->tunnel_src;
459  tr->dst = gt[0]->tunnel_dst.fp_addr;
460  tr->length = vlib_buffer_length_in_chain (vm, b[0]);
461  }
462  if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
463  {
465  b[1], sizeof (*tr));
466  tr->tunnel_id = gt[1] - gm->tunnels;
467  tr->src = gt[1]->tunnel_src;
468  tr->dst = gt[1]->tunnel_dst.fp_addr;
469  tr->length = vlib_buffer_length_in_chain (vm, b[1]);
470  }
471 
472  b += 2;
473  n_left_from -= 2;
474  }
475 
476  while (n_left_from >= 1)
477  {
478 
479  if (PREDICT_FALSE
480  (sw_if_index[0] != vnet_buffer (b[0])->sw_if_index[VLIB_TX]))
481  {
482  const vnet_hw_interface_t *hi;
483  sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
484  hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[0]);
485  gt[0] = &gm->tunnels[hi->dev_instance];
486  adj_index[0] = gt[0]->l2_adj_index;
487  }
488 
489  vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = adj_index[0];
490 
491  if (PREDICT_FALSE (gt[0]->type == GRE_TUNNEL_TYPE_ERSPAN))
492  {
493  /* Encap GRE seq# and ERSPAN type II header */
494  erspan_t2_t *h0;
495  u32 seq_num;
496  u64 hdr;
497  vlib_buffer_advance (b[0], -sizeof (erspan_t2_t));
498  h0 = vlib_buffer_get_current (b[0]);
499  seq_num = clib_atomic_fetch_add (&gt[0]->gre_sn->seq_num, 1);
500  hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
501  h0->seq_num = clib_host_to_net_u32 (seq_num);
502  h0->t2_u64 = hdr;
503  h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[0]->session_id);
504  }
505 
506  if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
507  {
509  b[0], sizeof (*tr));
510  tr->tunnel_id = gt[0] - gm->tunnels;
511  tr->src = gt[0]->tunnel_src;
512  tr->dst = gt[0]->tunnel_dst.fp_addr;
513  tr->length = vlib_buffer_length_in_chain (vm, b[0]);
514  }
515 
516  b += 1;
517  n_left_from -= 1;
518  }
519 
522  frame->n_vectors);
523 
524  vlib_node_increment_counter (vm, node->node_index,
525  GRE_ERROR_PKTS_ENCAP, frame->n_vectors);
526 
527  return frame->n_vectors;
528 }
529 
530 static char *gre_error_strings[] = {
531 #define gre_error(n,s) s,
532 #include "error.def"
533 #undef gre_error
534 };
535 
536 /* *INDENT-OFF* */
538 {
539  .name = "gre-encap",
540  .vector_size = sizeof (u32),
541  .format_trace = format_gre_tx_trace,
543  .n_errors = GRE_N_ERROR,
544  .error_strings = gre_error_strings,
545  .n_next_nodes = GRE_ENCAP_N_NEXT,
546  .next_nodes = {
547  [GRE_ENCAP_NEXT_L2_MIDCHAIN] = "adj-l2-midchain",
548  },
549 };
550 /* *INDENT-ON* */
551 
552 #ifndef CLIB_MARCH_VARIANT
553 static u8 *
554 format_gre_tunnel_name (u8 * s, va_list * args)
555 {
556  u32 dev_instance = va_arg (*args, u32);
557  gre_main_t *gm = &gre_main;
558  gre_tunnel_t *t;
559 
560  if (dev_instance >= vec_len (gm->tunnels))
561  return format (s, "<improperly-referenced>");
562 
563  t = pool_elt_at_index (gm->tunnels, dev_instance);
564  return format (s, "gre%d", t->user_instance);
565 }
566 
567 static u8 *
568 format_gre_device (u8 * s, va_list * args)
569 {
570  u32 dev_instance = va_arg (*args, u32);
571  CLIB_UNUSED (int verbose) = va_arg (*args, int);
572 
573  s = format (s, "GRE tunnel: id %d\n", dev_instance);
574  return s;
575 }
576 
577 static int
579  ip46_address_t * src, ip46_address_t * dst, u8 * is_l2)
580 {
581  gre_main_t *gm = &gre_main;
582  gre_tunnel_t *t;
583  u32 ti;
584 
586 
587  if (~0 == ti)
588  /* not one of ours */
589  return -1;
590 
591  t = pool_elt_at_index (gm->tunnels, ti);
592 
593  *src = t->tunnel_src;
594  *dst = t->tunnel_dst.fp_addr;
595  *is_l2 = t->type == GRE_TUNNEL_TYPE_TEB;
596 
597  return (0);
598 }
599 
600 /* *INDENT-OFF* */
602  .name = "GRE tunnel device",
603  .format_device_name = format_gre_tunnel_name,
604  .format_device = format_gre_device,
605  .format_tx_trace = format_gre_tx_trace,
606  .admin_up_down_function = gre_interface_admin_up_down,
607  .ip_tun_desc = gre_tunnel_desc,
608 #ifdef SOON
609  .clear counter = 0;
610 #endif
611 };
612 
614  .name = "GRE",
615  .format_header = format_gre_header_with_length,
616  .unformat_header = unformat_gre_header,
617  .build_rewrite = gre_build_rewrite,
618  .update_adjacency = gre_update_adj,
620 };
621 
623  .name = "mGRE",
624  .format_header = format_gre_header_with_length,
625  .unformat_header = unformat_gre_header,
626  .build_rewrite = gre_build_rewrite,
627  .update_adjacency = mgre_update_adj,
629 };
630 /* *INDENT-ON* */
631 #endif /* CLIB_MARCH_VARIANT */
632 
633 static void
635 {
637  u32 i;
638 
639  vec_add2 (gm->protocol_infos, pi, 1);
640  i = pi - gm->protocol_infos;
641 
642  pi->name = protocol_name;
643  pi->protocol = protocol;
644  pi->next_index = pi->node_index = ~0;
645 
646  hash_set (gm->protocol_info_by_protocol, protocol, i);
648 }
649 
650 static clib_error_t *
652 {
653  gre_main_t *gm = &gre_main;
654  clib_error_t *error;
655  ip_main_t *im = &ip_main;
656  ip_protocol_info_t *pi;
657 
658  clib_memset (gm, 0, sizeof (gm[0]));
659  gm->vlib_main = vm;
660  gm->vnet_main = vnet_get_main ();
661 
662  if ((error = vlib_call_init_function (vm, ip_main_init)))
663  return error;
664 
665  if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
666  return error;
667 
668  if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
669  return error;
670 
671  /* Set up the ip packet generator */
672  pi = ip_get_protocol_info (im, IP_PROTOCOL_GRE);
675 
676  gm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
677  gm->protocol_info_by_protocol = hash_create (0, sizeof (uword));
678  gm->tunnel_by_key4 =
679  hash_create_mem (0, sizeof (gre_tunnel_key4_t), sizeof (uword));
680  gm->tunnel_by_key6 =
681  hash_create_mem (0, sizeof (gre_tunnel_key6_t), sizeof (uword));
682  gm->seq_num_by_key =
683  hash_create_mem (0, sizeof (gre_sn_key_t), sizeof (uword));
684 
685 #define _(n,s) add_protocol (gm, GRE_PROTOCOL_##s, #s);
687 #undef _
689 }
690 
692 
693 /*
694  * fd.io coding-style-patch-verification: ON
695  *
696  * Local Variables:
697  * eval: (c-set-style "gnu")
698  * End:
699  */
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
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
VNET_HW_INTERFACE_CLASS(gre_hw_interface_class)
ip46_address_t src
Definition: gre.c:58
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:668
#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
static adj_walk_rc_t mgre_mk_complete_walk(adj_index_t ai, void *ctx)
Definition: gre.c:335
#define CLIB_UNUSED(x)
Definition: clib.h:82
Key for a IPv6 GRE Tunnel We use a different type so that the V4 key hash is as small as possible...
Definition: gre.h:146
uword * protocol_info_by_protocol
Definition: gre.h:267
Definition: nhrp.c:29
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
static clib_error_t * ip4_lookup_init(vlib_main_t *vm)
Definition: ip4_forward.c:1083
u64 as_u64
Definition: bihash_doc.h:63
u32 tunnel_id
Definition: gre.c:52
unsigned long u64
Definition: types.h:89
vnet_link_t adj_get_link_type(adj_index_t ai)
Return the link type of the adjacency.
Definition: adj.c:475
#define NULL
Definition: clib.h:58
gre_protocol_t protocol
GRE protocol type in host byte order.
Definition: gre.h:86
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
char * name
Name (a c string).
Definition: gre.h:83
IP unicast adjacency.
Definition: adj.h:221
a non-broadcast multiple access interface
Definition: interface.h:379
A GRE payload protocol registration.
Definition: gre.h:80
vl_api_address_t src
Definition: gre.api:60
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:561
int i
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:989
static u32 format_get_indent(u8 *s)
Definition: format.h:72
#define hash_set_mem(h, key, value)
Definition: hash.h:275
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
Definition: ip.h:106
#define VLIB_NODE_FN(node)
Definition: node.h:202
static uword vlib_buffer_length_in_chain(vlib_main_t *vm, vlib_buffer_t *b)
Get length in bytes of the buffer chain.
Definition: buffer_funcs.h:366
unsigned char u8
Definition: types.h:56
u32 * tunnel_index_by_sw_if_index
Mapping from sw_if_index to tunnel index.
Definition: gre.h:287
VNET_DEVICE_CLASS(gre_device_class)
#define clib_memcpy(d, s, n)
Definition: string.h:180
vnet_hw_interface_class_t mgre_hw_interface_class
Hash key for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:186
vl_api_ip_proto_t protocol
Definition: lb_types.api:71
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
unformat_function_t * unformat_pg_edit
Definition: ip.h:87
ip4_and_gre_header_t ip4_and_gre
Definition: gre.c:32
vl_api_interface_index_t sw_if_index
Definition: gre.api:59
static void gre4_fixup(vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t *b0, const void *data)
Definition: gre.c:281
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:129
void gre_tunnel_stack(adj_index_t ai)
gre_tunnel_stack
Definition: interface.c:149
enum adj_walk_rc_t_ adj_walk_rc_t
return codes from a adjacency walker callback function
gre_encap_next_t
Definition: gre.c:375
struct ip_adjacency_t_::@119::@120 nbr
IP_LOOKUP_NEXT_ARP/IP_LOOKUP_NEXT_REWRITE.
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
static_always_inline void vlib_buffer_enqueue_to_single_next(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, u16 next_index, u32 count)
Definition: buffer_node.h:452
ip6_and_gre_header_t ip6_and_gre
Definition: gre.c:41
union ip_adjacency_t_::@119 sub_type
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
#define vlib_call_init_function(vm, x)
Definition: init.h:270
ip46_address_t tunnel_src
The tunnel&#39;s source/local address.
Definition: gre.h:206
uword unformat_gre_header(unformat_input_t *input, va_list *args)
Definition: gre.c:165
#define VLIB_FRAME_SIZE
Definition: node.h:378
#define hash_create_string(elts, value_bytes)
Definition: hash.h:690
vl_api_fib_path_type_t type
Definition: fib_types.api:123
#define hash_create_mem(elts, key_bytes, value_bytes)
Definition: hash.h:661
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
static ip_protocol_info_t * ip_get_protocol_info(ip_main_t *im, u32 protocol)
Definition: ip.h:133
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
format_function_t * format_header
Definition: ip.h:78
long ctx[MAX_CONNS]
Definition: main.c:144
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
u32 node_index
Node which handles this type.
Definition: gre.h:92
void gre_update_adj(vnet_main_t *vnm, u32 sw_if_index, adj_index_t ai)
Definition: gre.c:310
#define PREDICT_FALSE(x)
Definition: clib.h:111
u8 * format_gre_tx_trace(u8 *s, va_list *args)
Definition: gre.c:66
format_function_t * format_buffer
Definition: node.h:358
vl_api_address_t dst
Definition: gre.api:61
u16 flags_and_version
Definition: packet.h:40
vlib_main_t * vm
Definition: in2out_ed.c:1810
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1150
uword * protocol_info_by_name
Hash tables mapping name/protocol to protocol info index.
Definition: gre.h:267
static u8 * format_gre_tunnel_name(u8 *s, va_list *args)
Definition: gre.c:554
format_function_t format_ip46_address
Definition: ip46_address.h:50
static clib_error_t * gre_input_init(vlib_main_t *vm)
Definition: node.c:540
static clib_error_t * gre_init(vlib_main_t *vm)
Definition: gre.c:651
Key for a IPv4 GRE Tunnel.
Definition: gre.h:121
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
clib_error_t * ip_main_init(vlib_main_t *vm)
Definition: ip_init.c:45
gre_tunnel_type_t type
Definition: gre.h:217
u32 flags
Definition: vhost_user.h:141
static u8 * format_gre_device(u8 *s, va_list *args)
Definition: gre.c:568
ip_main_t ip_main
Definition: ip_init.c:42
static int gre_tunnel_desc(u32 sw_if_index, ip46_address_t *src, ip46_address_t *dst, u8 *is_l2)
Definition: gre.c:578
u16 protocol
Definition: packet.h:55
void adj_nbr_midchain_update_rewrite(adj_index_t adj_index, adj_midchain_fixup_t fixup, const void *fixup_data, adj_flags_t flags, u8 *rewrite)
adj_nbr_midchain_update_rewrite
Definition: adj_midchain.c:532
gre_protocol_t
Definition: packet.h:30
u32 adj_index_t
An index for adjacencies.
Definition: adj_types.h:30
u8 * format_gre_header_with_length(u8 *s, va_list *args)
Definition: gre.c:95
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1810
#define hash_create(elts, value_bytes)
Definition: hash.h:696
#define ASSERT(truth)
u16 session_id
Definition: gre.api:56
static u8 * gre_build_rewrite(vnet_main_t *vnm, u32 sw_if_index, vnet_link_t link_type, const void *dst_address)
Definition: gre.c:212
u8 data[128]
Definition: ipsec_types.api:87
u32 next_index
Next index for this type.
Definition: gre.h:95
#define ERSPAN_HDR2
Definition: packet.h:164
enum vnet_link_t_ vnet_link_t
Link Type: A description of the protocol of packets on the link.
static int gre_proto_from_vnet_link(vnet_link_t link)
Definition: gre.c:189
gre_tunnel_t * tunnels
pool of tunnel instances
Definition: gre.h:257
uword unformat_vlib_number_by_name(unformat_input_t *input, va_list *args)
Definition: format.c:157
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
vnet_hw_interface_class_t gre_hw_interface_class
u32 user_instance
Definition: gre.h:240
vl_api_ip4_address_t hi
Definition: arp.api:37
#define clib_atomic_fetch_add(a, b)
Definition: atomics.h:23
enum adj_flags_t_ adj_flags_t
Flags on an IP adjacency.
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
void mgre_update_adj(vnet_main_t *vnm, u32 sw_if_index, adj_index_t ai)
Definition: gre.c:343
Definition: defs.h:47
vnet_device_class_t gre_device_class
clib_error_t * gre_interface_admin_up_down(vnet_main_t *vnm, u32 hw_if_index, u32 flags)
Definition: interface.c:531
ip46_address_t dst
Definition: gre.c:59
u16 payload_length
Definition: ip6_packet.h:298
static void add_protocol(gre_main_t *gm, gre_protocol_t protocol, char *protocol_name)
Definition: gre.c:634
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
uword unformat_gre_protocol_host_byte_order(unformat_input_t *input, va_list *args)
Definition: gre.c:134
#define GRE_FLAGS_SEQUENCE
Definition: packet.h:47
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
a point 2 point interface
Definition: interface.h:375
u8 * format_gre_header(u8 *s, va_list *args)
Definition: gre.c:126
unformat_function_t unformat_pg_gre_header
Definition: gre.h:353
u8 * format_gre_protocol(u8 *s, va_list *args)
Definition: gre.c:80
#define vnet_buffer(b)
Definition: buffer.h:408
fib_prefix_t tunnel_dst
The tunnel&#39;s destination/remote address.
Definition: gre.h:210
nhrp_entry_t * nhrp_entry_find(u32 sw_if_index, const ip46_address_t *peer)
Definition: nhrp.c:102
static vlib_node_t * vlib_get_node(vlib_main_t *vm, u32 i)
Get vlib node by index.
Definition: node_funcs.h:59
void nhrp_entry_adj_stack(const nhrp_entry_t *ne, adj_index_t ai)
Definition: nhrp.c:74
vlib_main_t vlib_node_runtime_t vlib_frame_t * frame
Definition: in2out_ed.c:1811
static gre_protocol_info_t * gre_get_protocol_info(gre_main_t *em, gre_protocol_t protocol)
Definition: gre.h:322
gre_protocol_info_t * protocol_infos
GRE payload protocol registrations.
Definition: gre.h:262
static void gre6_fixup(vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t *b0, const void *data)
Definition: gre.c:295
u32 length
Definition: gre.c:55
vlib_main_t * vlib_main
Definition: gre.h:294
static_always_inline void vlib_get_buffers(vlib_main_t *vm, u32 *bi, vlib_buffer_t **b, int count)
Translate array of buffer indices into buffer pointers.
Definition: buffer_funcs.h:244
static clib_error_t * ip6_lookup_init(vlib_main_t *vm)
Definition: ip6_forward.c:2707
uword unformat_gre_protocol_net_byte_order(unformat_input_t *input, va_list *args)
Definition: gre.c:154
static char * gre_error_strings[]
Definition: gre.c:530
gre_main_t gre_main
Definition: gre.c:26
static u16 ip4_header_checksum(ip4_header_t *i)
Definition: ip4_packet.h:247
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
u8 is_ipv6
Definition: acl_types.api:38