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Vector Packet Processing
decap.c
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1 /*
2  * decap.c - decapsulate VXLAN GPE
3  *
4  * Copyright (c) 2013 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  * @file
19  * @brief Functions for decapsulating VXLAN GPE tunnels
20  *
21 */
22 
23 #include <vlib/vlib.h>
24 #include <vnet/pg/pg.h>
26 
28 
29 /**
30  * @brief Struct for VXLAN GPE decap packet tracing
31  *
32  */
33 typedef struct {
38 
39 /**
40  * @brief Tracing function for VXLAN GPE packet decapsulation
41  *
42  * @param *s
43  * @param *args
44  *
45  * @return *s
46  *
47  */
48 static u8 * format_vxlan_gpe_rx_trace (u8 * s, va_list * args)
49 {
50  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
51  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
52  vxlan_gpe_rx_trace_t * t = va_arg (*args, vxlan_gpe_rx_trace_t *);
53 
54  if (t->tunnel_index != ~0)
55  {
56  s = format (s, "VXLAN-GPE: tunnel %d next %d error %d", t->tunnel_index,
57  t->next_index, t->error);
58  }
59  else
60  {
61  s = format (s, "VXLAN-GPE: no tunnel next %d error %d\n", t->next_index,
62  t->error);
63  }
64  return s;
65 }
66 
67 /**
68  * @brief Tracing function for VXLAN GPE packet decapsulation including length
69  *
70  * @param *s
71  * @param *args
72  *
73  * @return *s
74  *
75  */
76 static u8 * format_vxlan_gpe_with_length (u8 * s, va_list * args)
77 {
78  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
79  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
80 
81 
82  return s;
83 }
84 
85 /**
86  * @brief Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions
87  *
88  * It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE
89  * tunnels are "terminate local". This means that there is no "TX" interface for this
90  * decap case, so that field in the buffer_metadata can be "used for something else".
91  * The something else in this case is, for the IPv4/IPv6 inner-packet type case, the
92  * FIB index used to look up the inner-packet's adjacency.
93  *
94  * vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
95  *
96  * @param *vm
97  * @param *node
98  * @param *from_frame
99  * @param is_ip4
100  *
101  * @return from_frame->n_vectors
102  *
103  */
106  vlib_node_runtime_t * node,
107  vlib_frame_t * from_frame,
108  u8 is_ip4)
109 {
110  u32 n_left_from, next_index, *from, *to_next;
112  vnet_main_t * vnm = ngm->vnet_main;
114  u32 last_tunnel_index = ~0;
115  vxlan4_gpe_tunnel_key_t last_key4;
116  vxlan6_gpe_tunnel_key_t last_key6;
117  u32 pkts_decapsulated = 0;
118  u32 cpu_index = os_get_cpu_number ();
119  u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
120 
121  if (is_ip4)
122  memset (&last_key4, 0xff, sizeof(last_key4));
123  else
124  memset (&last_key6, 0xff, sizeof(last_key6));
125 
126  from = vlib_frame_vector_args (from_frame);
127  n_left_from = from_frame->n_vectors;
128 
129  next_index = node->cached_next_index;
130  stats_sw_if_index = node->runtime_data[0];
131  stats_n_packets = stats_n_bytes = 0;
132 
133  while (n_left_from > 0)
134  {
135  u32 n_left_to_next;
136 
137  vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
138 
139  while (n_left_from >= 4 && n_left_to_next >= 2)
140  {
141  u32 bi0, bi1;
142  vlib_buffer_t * b0, *b1;
143  u32 next0, next1;
144  ip4_vxlan_gpe_header_t * iuvn4_0, *iuvn4_1;
145  ip6_vxlan_gpe_header_t * iuvn6_0, *iuvn6_1;
146  uword * p0, *p1;
147  u32 tunnel_index0, tunnel_index1;
148  vxlan_gpe_tunnel_t * t0, *t1;
149  vxlan4_gpe_tunnel_key_t key4_0, key4_1;
150  vxlan6_gpe_tunnel_key_t key6_0, key6_1;
151  u32 error0, error1;
152  u32 sw_if_index0, sw_if_index1, len0, len1;
153 
154  /* Prefetch next iteration. */
155  {
156  vlib_buffer_t * p2, *p3;
157 
158  p2 = vlib_get_buffer (vm, from[2]);
159  p3 = vlib_get_buffer (vm, from[3]);
160 
161  vlib_prefetch_buffer_header(p2, LOAD);
162  vlib_prefetch_buffer_header(p3, LOAD);
163 
166  }
167 
168  bi0 = from[0];
169  bi1 = from[1];
170  to_next[0] = bi0;
171  to_next[1] = bi1;
172  from += 2;
173  to_next += 2;
174  n_left_to_next -= 2;
175  n_left_from -= 2;
176 
177  b0 = vlib_get_buffer (vm, bi0);
178  b1 = vlib_get_buffer (vm, bi1);
179 
180  if (is_ip4)
181  {
182  /* udp leaves current_data pointing at the vxlan-gpe header */
183  vlib_buffer_advance (b0, -(word) (sizeof(udp_header_t) + sizeof(ip4_header_t)));
184  vlib_buffer_advance (b1, -(word) (sizeof(udp_header_t) + sizeof(ip4_header_t)));
185 
186  iuvn4_0 = vlib_buffer_get_current (b0);
187  iuvn4_1 = vlib_buffer_get_current (b1);
188 
189  /* pop (ip, udp, vxlan) */
190  vlib_buffer_advance (b0, sizeof(*iuvn4_0));
191  vlib_buffer_advance (b1, sizeof(*iuvn4_1));
192  }
193  else
194  {
195  /* udp leaves current_data pointing at the vxlan-gpe header */
196  vlib_buffer_advance (b0, -(word) (sizeof(udp_header_t) + sizeof(ip6_header_t)));
197  vlib_buffer_advance (b1, -(word) (sizeof(udp_header_t) + sizeof(ip6_header_t)));
198 
199  iuvn6_0 = vlib_buffer_get_current (b0);
200  iuvn6_1 = vlib_buffer_get_current (b1);
201 
202  /* pop (ip, udp, vxlan) */
203  vlib_buffer_advance (b0, sizeof(*iuvn6_0));
204  vlib_buffer_advance (b1, sizeof(*iuvn6_1));
205  }
206 
207  tunnel_index0 = ~0;
208  tunnel_index1 = ~0;
209  error0 = 0;
210  error1 = 0;
211 
212  if (is_ip4)
213  {
214  next0 =
215  (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)?
216  ngm->decap_next_node_list[iuvn4_0->vxlan.protocol]: \
217  VXLAN_GPE_INPUT_NEXT_DROP;
218  next1 =
219  (iuvn4_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)?
220  ngm->decap_next_node_list[iuvn4_1->vxlan.protocol]: \
221  VXLAN_GPE_INPUT_NEXT_DROP;
222 
223  key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
224  key4_1.local = iuvn4_1->ip4.dst_address.as_u32;
225 
226  key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
227  key4_1.remote = iuvn4_1->ip4.src_address.as_u32;
228 
229  key4_0.vni = iuvn4_0->vxlan.vni_res;
230  key4_1.vni = iuvn4_1->vxlan.vni_res;
231 
232  key4_0.pad = 0;
233  key4_1.pad = 0;
234  }
235  else /* is_ip6 */
236  {
237  next0 = (iuvn6_0->vxlan.protocol < node->n_next_nodes) ?
238  iuvn6_0->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
239  next1 = (iuvn6_1->vxlan.protocol < node->n_next_nodes) ?
240  iuvn6_1->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
241 
242  key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
243  key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
244  key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
245  key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
246 
247  key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
248  key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
249  key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
250  key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
251 
252  key6_0.vni = iuvn6_0->vxlan.vni_res;
253  key6_1.vni = iuvn6_1->vxlan.vni_res;
254  }
255 
256  /* Processing packet 0*/
257  if (is_ip4)
258  {
259  /* Processing for key4_0 */
260  if (PREDICT_FALSE((key4_0.as_u64[0] != last_key4.as_u64[0])
261  || (key4_0.as_u64[1] != last_key4.as_u64[1])))
262  {
263  p0 = hash_get_mem(ngm->vxlan4_gpe_tunnel_by_key, &key4_0);
264 
265  if (p0 == 0)
266  {
267  error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
268  goto trace0;
269  }
270 
271  last_key4.as_u64[0] = key4_0.as_u64[0];
272  last_key4.as_u64[1] = key4_0.as_u64[1];
273  tunnel_index0 = last_tunnel_index = p0[0];
274  }
275  else
276  tunnel_index0 = last_tunnel_index;
277  }
278  else /* is_ip6 */
279  {
280  next0 =
281  (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)?
282  ngm->decap_next_node_list[iuvn6_0->vxlan.protocol]: \
283  VXLAN_GPE_INPUT_NEXT_DROP;
284  next1 =
285  (iuvn6_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)?
286  ngm->decap_next_node_list[iuvn6_1->vxlan.protocol]: \
287  VXLAN_GPE_INPUT_NEXT_DROP;
288 
289  key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
290  key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
291  key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
292  key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
293 
294  key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
295  key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
296  key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
297  key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
298 
299  key6_0.vni = iuvn6_0->vxlan.vni_res;
300  key6_1.vni = iuvn6_1->vxlan.vni_res;
301 
302  /* Processing for key6_0 */
303  if (PREDICT_FALSE(memcmp (&key6_0, &last_key6, sizeof(last_key6)) != 0))
304  {
305  p0 = hash_get_mem(ngm->vxlan6_gpe_tunnel_by_key, &key6_0);
306 
307  if (p0 == 0)
308  {
309  error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
310  goto trace0;
311  }
312 
313  memcpy (&last_key6, &key6_0, sizeof(key6_0));
314  tunnel_index0 = last_tunnel_index = p0[0];
315  }
316  else
317  tunnel_index0 = last_tunnel_index;
318  }
319 
320  t0 = pool_elt_at_index(ngm->tunnels, tunnel_index0);
321 
322 
323  sw_if_index0 = t0->sw_if_index;
324  len0 = vlib_buffer_length_in_chain (vm, b0);
325 
326  /* Required to make the l2 tag push / pop code work on l2 subifs */
327  vnet_update_l2_len (b0);
328 
329  /**
330  * ip[46] lookup in the configured FIB
331  */
332  vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
333 
334  pkts_decapsulated++;
335  stats_n_packets += 1;
336  stats_n_bytes += len0;
337 
338  if (PREDICT_FALSE(sw_if_index0 != stats_sw_if_index))
339  {
340  stats_n_packets -= 1;
341  stats_n_bytes -= len0;
342  if (stats_n_packets)
345  cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
346  stats_n_packets = 1;
347  stats_n_bytes = len0;
348  stats_sw_if_index = sw_if_index0;
349  }
350 
351  trace0: b0->error = error0 ? node->errors[error0] : 0;
352 
354  {
355  vxlan_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof(*tr));
356  tr->next_index = next0;
357  tr->error = error0;
358  tr->tunnel_index = tunnel_index0;
359  }
360 
361  /* Process packet 1 */
362  if (is_ip4)
363  {
364  /* Processing for key4_1 */
365  if (PREDICT_FALSE(
366  (key4_1.as_u64[0] != last_key4.as_u64[0])
367  || (key4_1.as_u64[1] != last_key4.as_u64[1])))
368  {
369  p1 = hash_get_mem(ngm->vxlan4_gpe_tunnel_by_key, &key4_1);
370 
371  if (p1 == 0)
372  {
373  error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
374  goto trace1;
375  }
376 
377  last_key4.as_u64[0] = key4_1.as_u64[0];
378  last_key4.as_u64[1] = key4_1.as_u64[1];
379  tunnel_index1 = last_tunnel_index = p1[0];
380  }
381  else
382  tunnel_index1 = last_tunnel_index;
383  }
384  else /* is_ip6 */
385  {
386  /* Processing for key6_1 */
387  if (PREDICT_FALSE(memcmp (&key6_1, &last_key6, sizeof(last_key6)) != 0))
388  {
389  p1 = hash_get_mem(ngm->vxlan6_gpe_tunnel_by_key, &key6_1);
390 
391  if (p1 == 0)
392  {
393  error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
394  goto trace1;
395  }
396 
397  memcpy (&last_key6, &key6_1, sizeof(key6_1));
398  tunnel_index1 = last_tunnel_index = p1[0];
399  }
400  else
401  tunnel_index1 = last_tunnel_index;
402  }
403 
404  t1 = pool_elt_at_index(ngm->tunnels, tunnel_index1);
405 
406  sw_if_index1 = t1->sw_if_index;
407  len1 = vlib_buffer_length_in_chain (vm, b1);
408 
409  /* Required to make the l2 tag push / pop code work on l2 subifs */
410  vnet_update_l2_len (b1);
411 
412  /*
413  * ip[46] lookup in the configured FIB
414  */
415  vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
416 
417  pkts_decapsulated++;
418  stats_n_packets += 1;
419  stats_n_bytes += len1;
420 
421  /* Batch stats increment on the same vxlan tunnel so counter
422  is not incremented per packet */
423  if (PREDICT_FALSE(sw_if_index1 != stats_sw_if_index))
424  {
425  stats_n_packets -= 1;
426  stats_n_bytes -= len1;
427  if (stats_n_packets)
430  cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
431  stats_n_packets = 1;
432  stats_n_bytes = len1;
433  stats_sw_if_index = sw_if_index1;
434  }
435  vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
436 
437  trace1: b1->error = error1 ? node->errors[error1] : 0;
438 
440  {
441  vxlan_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof(*tr));
442  tr->next_index = next1;
443  tr->error = error1;
444  tr->tunnel_index = tunnel_index1;
445  }
446 
447  vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next,
448  n_left_to_next, bi0, bi1, next0, next1);
449  }
450 
451  while (n_left_from > 0 && n_left_to_next > 0)
452  {
453  u32 bi0;
454  vlib_buffer_t * b0;
455  u32 next0;
456  ip4_vxlan_gpe_header_t * iuvn4_0;
457  ip6_vxlan_gpe_header_t * iuvn6_0;
458  uword * p0;
459  u32 tunnel_index0;
460  vxlan_gpe_tunnel_t * t0;
461  vxlan4_gpe_tunnel_key_t key4_0;
462  vxlan6_gpe_tunnel_key_t key6_0;
463  u32 error0;
464  u32 sw_if_index0, len0;
465 
466  bi0 = from[0];
467  to_next[0] = bi0;
468  from += 1;
469  to_next += 1;
470  n_left_from -= 1;
471  n_left_to_next -= 1;
472 
473  b0 = vlib_get_buffer (vm, bi0);
474 
475  if (is_ip4)
476  {
477  /* udp leaves current_data pointing at the vxlan-gpe header */
479  b0, -(word) (sizeof(udp_header_t) + sizeof(ip4_header_t)));
480 
481  iuvn4_0 = vlib_buffer_get_current (b0);
482 
483  /* pop (ip, udp, vxlan) */
484  vlib_buffer_advance (b0, sizeof(*iuvn4_0));
485  }
486  else
487  {
488  /* udp leaves current_data pointing at the vxlan-gpe header */
490  b0, -(word) (sizeof(udp_header_t) + sizeof(ip6_header_t)));
491 
492  iuvn6_0 = vlib_buffer_get_current (b0);
493 
494  /* pop (ip, udp, vxlan) */
495  vlib_buffer_advance (b0, sizeof(*iuvn6_0));
496  }
497 
498  tunnel_index0 = ~0;
499  error0 = 0;
500 
501  if (is_ip4)
502  {
503  next0 =
504  (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)?
505  ngm->decap_next_node_list[iuvn4_0->vxlan.protocol]: \
506  VXLAN_GPE_INPUT_NEXT_DROP;
507 
508  key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
509  key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
510  key4_0.vni = iuvn4_0->vxlan.vni_res;
511  key4_0.pad = 0;
512 
513  /* Processing for key4_0 */
514  if (PREDICT_FALSE(
515  (key4_0.as_u64[0] != last_key4.as_u64[0])
516  || (key4_0.as_u64[1] != last_key4.as_u64[1])))
517  {
518  p0 = hash_get_mem(ngm->vxlan4_gpe_tunnel_by_key, &key4_0);
519 
520  if (p0 == 0)
521  {
522  error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
523  goto trace00;
524  }
525 
526  last_key4.as_u64[0] = key4_0.as_u64[0];
527  last_key4.as_u64[1] = key4_0.as_u64[1];
528  tunnel_index0 = last_tunnel_index = p0[0];
529  }
530  else
531  tunnel_index0 = last_tunnel_index;
532  }
533  else /* is_ip6 */
534  {
535  next0 =
536  (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)?
537  ngm->decap_next_node_list[iuvn6_0->vxlan.protocol]: \
538  VXLAN_GPE_INPUT_NEXT_DROP;
539 
540  key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
541  key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
542  key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
543  key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
544  key6_0.vni = iuvn6_0->vxlan.vni_res;
545 
546  /* Processing for key6_0 */
547  if (PREDICT_FALSE(memcmp (&key6_0, &last_key6, sizeof(last_key6)) != 0))
548  {
549  p0 = hash_get_mem(ngm->vxlan6_gpe_tunnel_by_key, &key6_0);
550 
551  if (p0 == 0)
552  {
553  error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
554  goto trace00;
555  }
556 
557  memcpy (&last_key6, &key6_0, sizeof(key6_0));
558  tunnel_index0 = last_tunnel_index = p0[0];
559  }
560  else
561  tunnel_index0 = last_tunnel_index;
562  }
563 
564  t0 = pool_elt_at_index(ngm->tunnels, tunnel_index0);
565 
566 
567  sw_if_index0 = t0->sw_if_index;
568  len0 = vlib_buffer_length_in_chain (vm, b0);
569 
570  /* Required to make the l2 tag push / pop code work on l2 subifs */
571  vnet_update_l2_len (b0);
572 
573  /*
574  * ip[46] lookup in the configured FIB
575  */
576  vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
577 
578  pkts_decapsulated++;
579  stats_n_packets += 1;
580  stats_n_bytes += len0;
581 
582  /* Batch stats increment on the same vxlan-gpe tunnel so counter
583  is not incremented per packet */
584  if (PREDICT_FALSE(sw_if_index0 != stats_sw_if_index))
585  {
586  stats_n_packets -= 1;
587  stats_n_bytes -= len0;
588  if (stats_n_packets)
591  cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
592  stats_n_packets = 1;
593  stats_n_bytes = len0;
594  stats_sw_if_index = sw_if_index0;
595  }
596 
597  trace00: b0->error = error0 ? node->errors[error0] : 0;
598 
600  {
601  vxlan_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof(*tr));
602  tr->next_index = next0;
603  tr->error = error0;
604  tr->tunnel_index = tunnel_index0;
605  }
606  vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
607  n_left_to_next, bi0, next0);
608  }
609 
610  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
611  }
613  VXLAN_GPE_ERROR_DECAPSULATED, pkts_decapsulated);
614  /* Increment any remaining batch stats */
615  if (stats_n_packets)
616  {
619  stats_sw_if_index, stats_n_packets, stats_n_bytes);
620  node->runtime_data[0] = stats_sw_if_index;
621  }
622  return from_frame->n_vectors;
623 }
624 
625 /**
626  * @brief Graph processing dispatch function for IPv4 VXLAN GPE
627  *
628  * @node vxlan4-gpe-input
629  * @param *vm
630  * @param *node
631  * @param *from_frame
632  *
633  * @return from_frame->n_vectors
634  *
635  */
636 static uword
638  vlib_frame_t * from_frame)
639 {
640  return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */1);
641 }
642 
643 
644 void
645 vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index)
646 {
648  hm->decap_next_node_list[protocol_id] = next_node_index;
649  return;
650 }
651 
652 void
653 vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index)
654 {
656  hm->decap_next_node_list[protocol_id] = VXLAN_GPE_INPUT_NEXT_DROP;
657  return;
658 }
659 
660 
661 /**
662  * @brief Graph processing dispatch function for IPv6 VXLAN GPE
663  *
664  * @node vxlan6-gpe-input
665  * @param *vm
666  * @param *node
667  * @param *from_frame
668  *
669  * @return from_frame->n_vectors - uword
670  *
671  */
672 static uword
674  vlib_frame_t * from_frame)
675 {
676  return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */0);
677 }
678 
679 /**
680  * @brief VXLAN GPE error strings
681  */
682 static char * vxlan_gpe_error_strings[] = {
683 #define vxlan_gpe_error(n,s) s,
685 #undef vxlan_gpe_error
686 #undef _
687 };
688 
690  .function = vxlan4_gpe_input,
691  .name = "vxlan4-gpe-input",
692  /* Takes a vector of packets. */
693  .vector_size = sizeof (u32),
694  .type = VLIB_NODE_TYPE_INTERNAL,
695  .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
696  .error_strings = vxlan_gpe_error_strings,
697 
698  .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
699  .next_nodes = {
700 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
702 #undef _
703  },
704 
705  .format_buffer = format_vxlan_gpe_with_length,
706  .format_trace = format_vxlan_gpe_rx_trace,
707  // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
708 };
709 
711 
713  .function = vxlan6_gpe_input,
714  .name = "vxlan6-gpe-input",
715  /* Takes a vector of packets. */
716  .vector_size = sizeof (u32),
717  .type = VLIB_NODE_TYPE_INTERNAL,
718  .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
719  .error_strings = vxlan_gpe_error_strings,
720 
721  .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
722  .next_nodes = {
723 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
725 #undef _
726  },
727 
728  .format_buffer = format_vxlan_gpe_with_length,
729  .format_trace = format_vxlan_gpe_rx_trace,
730  // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
731 };
732 
uword * vxlan6_gpe_tunnel_by_key
lookup IPv6 VXLAN GPE tunnel by key
Definition: vxlan_gpe.h:159
#define CLIB_UNUSED(x)
Definition: clib.h:79
u8 runtime_data[0]
Function dependent node-runtime data.
Definition: node.h:463
vlib_node_registration_t vxlan4_gpe_input_node
(constructor) VLIB_REGISTER_NODE (vxlan4_gpe_input_node)
Definition: decap.c:689
vnet_interface_main_t interface_main
Definition: vnet.h:57
Struct for VXLAN GPE decap packet tracing.
Definition: decap.c:33
vlib_node_registration_t vxlan_gpe_input_node
Definition: decap.c:27
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:459
VXLAN GPE definitions.
vlib_node_registration_t vxlan6_gpe_input_node
(constructor) VLIB_REGISTER_NODE (vxlan6_gpe_input_node)
Definition: decap.c:712
struct _vlib_node_registration vlib_node_registration_t
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:418
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:100
vnet_main_t * vnet_main
State convenience vnet_main_t.
Definition: vxlan_gpe.h:170
static char * vxlan_gpe_error_strings[]
VXLAN GPE error strings.
Definition: decap.c:682
#define always_inline
Definition: clib.h:84
vlib_combined_counter_main_t * combined_sw_if_counters
Definition: interface.h:626
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:164
void vxlan_gpe_register_decap_protocol(u8 protocol_id, uword next_node_index)
Definition: decap.c:645
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:397
static uword vxlan_gpe_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, u8 is_ip4)
Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions.
Definition: decap.c:105
Struct for VXLAN GPE tunnel.
Definition: vxlan_gpe.h:90
uword os_get_cpu_number(void)
Definition: unix-misc.c:224
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:188
vxlan_gpe_main_t vxlan_gpe_main
Definition: vxlan_gpe.c:24
#define PREDICT_FALSE(x)
Definition: clib.h:97
#define vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1)
Finish enqueueing two buffers forward in the graph.
Definition: buffer_node.h:70
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:216
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:350
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:113
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1115
u16 n_vectors
Definition: node.h:344
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:82
vlib_main_t * vm
Definition: buffer.c:276
#define VLIB_BUFFER_IS_TRACED
Definition: buffer.h:85
static uword vxlan4_gpe_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Graph processing dispatch function for IPv4 VXLAN GPE.
Definition: decap.c:637
#define ARRAY_LEN(x)
Definition: clib.h:59
#define foreach_vxlan_gpe_input_next
next nodes for VXLAN GPE input
Definition: vxlan_gpe.h:129
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:455
unsigned int u32
Definition: types.h:88
static void vlib_increment_combined_counter(vlib_combined_counter_main_t *cm, u32 cpu_index, u32 index, u64 n_packets, u64 n_bytes)
Increment a combined counter.
Definition: counter.h:211
static u8 * format_vxlan_gpe_with_length(u8 *s, va_list *args)
Tracing function for VXLAN GPE packet decapsulation including length.
Definition: decap.c:76
Struct for VXLAN GPE node state.
Definition: vxlan_gpe.h:152
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:201
uword decap_next_node_list[VXLAN_GPE_PROTOCOL_MAX]
List of next nodes for the decap indexed on protocol.
Definition: vxlan_gpe.h:173
vxlan_gpe_tunnel_t * tunnels
vector of encap tunnel instances
Definition: vxlan_gpe.h:154
u64 uword
Definition: types.h:112
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 vxlan_gpe_unregister_decap_protocol(u8 protocol_id, uword next_node_index)
Definition: decap.c:653
Definition: defs.h:47
uword * vxlan4_gpe_tunnel_by_key
lookup IPv4 VXLAN GPE tunnel by key
Definition: vxlan_gpe.h:157
u32 decap_fib_index
FIB indices - inner IP packet lookup here.
Definition: vxlan_gpe.h:105
i64 word
Definition: types.h:111
unsigned char u8
Definition: types.h:56
static void vnet_update_l2_len(vlib_buffer_t *b)
Definition: l2_input.h:196
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:253
#define hash_get_mem(h, key)
Definition: hash.h:268
#define vnet_buffer(b)
Definition: buffer.h:294
VLIB_NODE_FUNCTION_MULTIARCH(l2t_decap_node, l2t_decap_node_fn)
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
u32 sw_if_index
vnet intfc sw_if_index
Definition: vxlan_gpe.h:113
u8 data[0]
Packet data.
Definition: buffer.h:152
static uword vxlan6_gpe_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Graph processing dispatch function for IPv6 VXLAN GPE.
Definition: decap.c:673
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:67
u32 flags
buffer flags: VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:74
static u8 * format_vxlan_gpe_rx_trace(u8 *s, va_list *args)
Tracing function for VXLAN GPE packet decapsulation.
Definition: decap.c:48
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57