FD.io VPP  v18.01-8-g0eacf49
Vector Packet Processing
encap.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 #include <vppinfra/error.h>
16 #include <vppinfra/hash.h>
17 #include <vnet/vnet.h>
18 #include <vnet/ip/ip.h>
19 #include <vnet/ethernet/ethernet.h>
20 #include <vnet/vxlan/vxlan.h>
21 
22 /* Statistics (not all errors) */
23 #define foreach_vxlan_encap_error \
24 _(ENCAPSULATED, "good packets encapsulated")
25 
26 static char * vxlan_encap_error_strings[] = {
27 #define _(sym,string) string,
29 #undef _
30 };
31 
32 typedef enum {
33 #define _(sym,str) VXLAN_ENCAP_ERROR_##sym,
35 #undef _
38 
39 typedef enum {
43 
44 typedef struct {
48 
49 u8 * format_vxlan_encap_trace (u8 * s, va_list * args)
50 {
51  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
52  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
54  = va_arg (*args, vxlan_encap_trace_t *);
55 
56  s = format (s, "VXLAN encap to vxlan_tunnel%d vni %d",
57  t->tunnel_index, t->vni);
58  return s;
59 }
60 
61 
62 #define foreach_fixed_header4_offset \
63  _(0) _(1) _(2) _(3)
64 
65 #define foreach_fixed_header6_offset \
66  _(0) _(1) _(2) _(3) _(4) _(5) _(6)
67 
70  vlib_node_runtime_t * node,
71  vlib_frame_t * from_frame,
72  u8 is_ip4, u8 csum_offload)
73 {
74  u32 n_left_from, next_index, * from, * to_next;
75  vxlan_main_t * vxm = &vxlan_main;
76  vnet_main_t * vnm = vxm->vnet_main;
78  u32 pkts_encapsulated = 0;
79  u16 old_l0 = 0, old_l1 = 0;
80  u32 thread_index = vlib_get_thread_index();
81  u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
82  u32 sw_if_index0 = 0, sw_if_index1 = 0;
83  u32 next0 = 0, next1 = 0;
84  vnet_hw_interface_t * hi0, * hi1;
85  vxlan_tunnel_t * t0 = NULL, * t1 = NULL;
86 
87  from = vlib_frame_vector_args (from_frame);
88  n_left_from = from_frame->n_vectors;
89 
90  next_index = node->cached_next_index;
91  stats_sw_if_index = node->runtime_data[0];
92  stats_n_packets = stats_n_bytes = 0;
93 
94  while (n_left_from > 0)
95  {
96  u32 n_left_to_next;
97 
98  vlib_get_next_frame (vm, node, next_index,
99  to_next, n_left_to_next);
100 
101  while (n_left_from >= 4 && n_left_to_next >= 2)
102  {
103  u32 bi0, bi1;
104  vlib_buffer_t * b0, * b1;
105  u32 flow_hash0, flow_hash1;
106  u32 len0, len1;
107  ip4_header_t * ip4_0, * ip4_1;
108  ip6_header_t * ip6_0, * ip6_1;
109  udp_header_t * udp0, * udp1;
110  u64 * copy_src0, * copy_dst0;
111  u64 * copy_src1, * copy_dst1;
112  u32 * copy_src_last0, * copy_dst_last0;
113  u32 * copy_src_last1, * copy_dst_last1;
114  u16 new_l0, new_l1;
115  ip_csum_t sum0, sum1;
116 
117  /* Prefetch next iteration. */
118  {
119  vlib_buffer_t * p2, * p3;
120 
121  p2 = vlib_get_buffer (vm, from[2]);
122  p3 = vlib_get_buffer (vm, from[3]);
123 
124  vlib_prefetch_buffer_header (p2, LOAD);
125  vlib_prefetch_buffer_header (p3, LOAD);
126 
129  }
130 
131  bi0 = from[0];
132  bi1 = from[1];
133  to_next[0] = bi0;
134  to_next[1] = bi1;
135  from += 2;
136  to_next += 2;
137  n_left_to_next -= 2;
138  n_left_from -= 2;
139 
140  b0 = vlib_get_buffer (vm, bi0);
141  b1 = vlib_get_buffer (vm, bi1);
142 
143  flow_hash0 = vnet_l2_compute_flow_hash (b0);
144  flow_hash1 = vnet_l2_compute_flow_hash (b1);
145 
146  /* Get next node index and adj index from tunnel next_dpo */
147  if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
148  {
149  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
150  hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
151  t0 = &vxm->tunnels[hi0->dev_instance];
152  /* Note: change to always set next0 if it may be set to drop */
153  next0 = t0->next_dpo.dpoi_next_node;
154  }
155  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index;
156 
157  /* Get next node index and adj index from tunnel next_dpo */
158  if (sw_if_index1 != vnet_buffer(b1)->sw_if_index[VLIB_TX])
159  {
160  sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
161  hi1 = vnet_get_sup_hw_interface (vnm, sw_if_index1);
162  t1 = &vxm->tunnels[hi1->dev_instance];
163  /* Note: change to always set next1 if it may be set to drop */
164  next1 = t1->next_dpo.dpoi_next_node;
165  }
166  vnet_buffer(b1)->ip.adj_index[VLIB_TX] = t1->next_dpo.dpoi_index;
167 
168  /* Apply the rewrite string. $$$$ vnet_rewrite? */
169  vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
170  vlib_buffer_advance (b1, -(word)_vec_len(t1->rewrite));
171 
172  if (is_ip4)
173  {
174  /* IP4 VXLAN header should be 36 octects */
175  ASSERT(sizeof(ip4_vxlan_header_t) == 36);
176  ASSERT(vec_len(t0->rewrite) == sizeof(ip4_vxlan_header_t));
177  ASSERT(vec_len(t1->rewrite) == sizeof(ip4_vxlan_header_t));
178 
179  ip4_0 = vlib_buffer_get_current(b0);
180  ip4_1 = vlib_buffer_get_current(b1);
181 
182  /* Copy the fixed header */
183  copy_dst0 = (u64 *) ip4_0;
184  copy_src0 = (u64 *) t0->rewrite;
185  copy_dst1 = (u64 *) ip4_1;
186  copy_src1 = (u64 *) t1->rewrite;
187  /* Copy first 32 octets 8-bytes at a time */
188 #define _(offs) copy_dst0[offs] = copy_src0[offs];
190 #undef _
191 #define _(offs) copy_dst1[offs] = copy_src1[offs];
193 #undef _
194  /* Last 4 octets. Hopefully gcc will be our friend */
195  copy_dst_last0 = (u32 *)(&copy_dst0[4]);
196  copy_src_last0 = (u32 *)(&copy_src0[4]);
197  copy_dst_last0[0] = copy_src_last0[0];
198  copy_dst_last1 = (u32 *)(&copy_dst1[4]);
199  copy_src_last1 = (u32 *)(&copy_src1[4]);
200  copy_dst_last1[0] = copy_src_last1[0];
201 
202  /* Fix the IP4 checksum and length */
203  if (csum_offload)
204  {
205  ip4_0->length = clib_host_to_net_u16
206  (vlib_buffer_length_in_chain (vm, b0));
207  b0->flags |=
208  VNET_BUFFER_F_OFFLOAD_IP_CKSUM | VNET_BUFFER_F_IS_IP4;
209  vnet_buffer (b0)->l3_hdr_offset = (u8 *) ip4_0 - b0->data;
210  ip4_1->length = clib_host_to_net_u16
211  (vlib_buffer_length_in_chain (vm, b1));
212  b1->flags |=
213  VNET_BUFFER_F_OFFLOAD_IP_CKSUM | VNET_BUFFER_F_IS_IP4;
214  vnet_buffer (b1)->l3_hdr_offset = (u8 *) ip4_1 - b1->data;
215  }
216  else
217  {
218  sum0 = ip4_0->checksum;
219  new_l0 = /* old_l0 always 0, see the rewrite setup */
220  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
221  sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
222  length /* changed member */);
223  ip4_0->checksum = ip_csum_fold (sum0);
224  ip4_0->length = new_l0;
225  sum1 = ip4_1->checksum;
226  new_l1 = /* old_l1 always 0, see the rewrite setup */
227  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1));
228  sum1 = ip_csum_update (sum1, old_l1, new_l1, ip4_header_t,
229  length /* changed member */);
230  ip4_1->checksum = ip_csum_fold (sum1);
231  ip4_1->length = new_l1;
232  }
233 
234  /* Fix UDP length and set source port */
235  udp0 = (udp_header_t *)(ip4_0+1);
236  new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
237  - sizeof (*ip4_0));
238  udp0->length = new_l0;
239  udp0->src_port = flow_hash0;
240  udp1 = (udp_header_t *)(ip4_1+1);
241  new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b1)
242  - sizeof (*ip4_1));
243  udp1->length = new_l1;
244  udp1->src_port = flow_hash1;
245 
246  /* UDP checksum only if checksum offload is used */
247  if (csum_offload)
248  {
249  b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
250  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
251  b1->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
252  vnet_buffer (b1)->l4_hdr_offset = (u8 *) udp1 - b1->data;
253  }
254  }
255  else /* ipv6 */
256  {
257  int bogus = 0;
258 
259  /* IP6 VXLAN header should be 56 octects */
260  ASSERT(sizeof(ip6_vxlan_header_t) == 56);
261  ASSERT(vec_len(t0->rewrite) == sizeof(ip6_vxlan_header_t));
262  ASSERT(vec_len(t1->rewrite) == sizeof(ip6_vxlan_header_t));
263  ip6_0 = vlib_buffer_get_current(b0);
264  ip6_1 = vlib_buffer_get_current(b1);
265 
266  /* Copy the fixed header */
267  copy_dst0 = (u64 *) ip6_0;
268  copy_src0 = (u64 *) t0->rewrite;
269  copy_dst1 = (u64 *) ip6_1;
270  copy_src1 = (u64 *) t1->rewrite;
271  /* Copy first 56 (ip6) octets 8-bytes at a time */
272 #define _(offs) copy_dst0[offs] = copy_src0[offs];
274 #undef _
275 #define _(offs) copy_dst1[offs] = copy_src1[offs];
277 #undef _
278  /* Fix IP6 payload length */
279  new_l0 =
280  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
281  - sizeof(*ip6_0));
282  ip6_0->payload_length = new_l0;
283  new_l1 =
284  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1)
285  - sizeof(*ip6_1));
286  ip6_1->payload_length = new_l1;
287 
288  /* Fix UDP length and set source port */
289  udp0 = (udp_header_t *)(ip6_0+1);
290  udp0->length = new_l0;
291  udp0->src_port = flow_hash0;
292  udp1 = (udp_header_t *)(ip6_1+1);
293  udp1->length = new_l1;
294  udp1->src_port = flow_hash1;
295 
296  /* IPv6 UDP checksum is mandatory */
297  if (csum_offload)
298  {
299  b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
300  vnet_buffer (b0)->l3_hdr_offset = (u8 *) ip6_0 - b0->data;
301  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
302  b1->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
303  vnet_buffer (b1)->l3_hdr_offset = (u8 *) ip6_1 - b1->data;
304  vnet_buffer (b1)->l4_hdr_offset = (u8 *) udp1 - b1->data;
305  }
306  else
307  {
309  (vm, b0, ip6_0, &bogus);
310  ASSERT(bogus == 0);
311  if (udp0->checksum == 0)
312  udp0->checksum = 0xffff;
314  (vm, b1, ip6_1, &bogus);
315  ASSERT(bogus == 0);
316  if (udp1->checksum == 0)
317  udp1->checksum = 0xffff;
318  }
319  }
320 
321  pkts_encapsulated += 2;
322  len0 = vlib_buffer_length_in_chain (vm, b0);
323  len1 = vlib_buffer_length_in_chain (vm, b1);
324  stats_n_packets += 2;
325  stats_n_bytes += len0 + len1;
326 
327  /* Batch stats increment on the same vxlan tunnel so counter is not
328  incremented per packet. Note stats are still incremented for deleted
329  and admin-down tunnel where packets are dropped. It is not worthwhile
330  to check for this rare case and affect normal path performance. */
331  if (PREDICT_FALSE ((sw_if_index0 != stats_sw_if_index) ||
332  (sw_if_index1 != stats_sw_if_index)))
333  {
334  stats_n_packets -= 2;
335  stats_n_bytes -= len0 + len1;
336  if (sw_if_index0 == sw_if_index1)
337  {
338  if (stats_n_packets)
341  thread_index, stats_sw_if_index,
342  stats_n_packets, stats_n_bytes);
343  stats_sw_if_index = sw_if_index0;
344  stats_n_packets = 2;
345  stats_n_bytes = len0 + len1;
346  }
347  else
348  {
351  thread_index, sw_if_index0, 1, len0);
354  thread_index, sw_if_index1, 1, len1);
355  }
356  }
357 
359  {
360  vxlan_encap_trace_t *tr =
361  vlib_add_trace (vm, node, b0, sizeof (*tr));
362  tr->tunnel_index = t0 - vxm->tunnels;
363  tr->vni = t0->vni;
364  }
365 
367  {
368  vxlan_encap_trace_t *tr =
369  vlib_add_trace (vm, node, b1, sizeof (*tr));
370  tr->tunnel_index = t1 - vxm->tunnels;
371  tr->vni = t1->vni;
372  }
373 
374  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
375  to_next, n_left_to_next,
376  bi0, bi1, next0, next1);
377  }
378 
379  while (n_left_from > 0 && n_left_to_next > 0)
380  {
381  u32 bi0;
382  vlib_buffer_t * b0;
383  u32 flow_hash0;
384  u32 len0;
385  ip4_header_t * ip4_0;
386  ip6_header_t * ip6_0;
387  udp_header_t * udp0;
388  u64 * copy_src0, * copy_dst0;
389  u32 * copy_src_last0, * copy_dst_last0;
390  u16 new_l0;
391  ip_csum_t sum0;
392 
393  bi0 = from[0];
394  to_next[0] = bi0;
395  from += 1;
396  to_next += 1;
397  n_left_from -= 1;
398  n_left_to_next -= 1;
399 
400  b0 = vlib_get_buffer (vm, bi0);
401 
402  flow_hash0 = vnet_l2_compute_flow_hash(b0);
403 
404  /* Get next node index and adj index from tunnel next_dpo */
405  if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
406  {
407  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
408  hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
409  t0 = &vxm->tunnels[hi0->dev_instance];
410  /* Note: change to always set next0 if it may be set to drop */
411  next0 = t0->next_dpo.dpoi_next_node;
412  }
413  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index;
414 
415  /* Apply the rewrite string. $$$$ vnet_rewrite? */
416  vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
417 
418  if (is_ip4)
419  {
420  /* IP4 VXLAN header should be 36 octects */
421  ASSERT(sizeof(ip4_vxlan_header_t) == 36);
422  ASSERT(vec_len(t0->rewrite) == sizeof(ip4_vxlan_header_t));
423  ip4_0 = vlib_buffer_get_current(b0);
424 
425  /* Copy the fixed header */
426  copy_dst0 = (u64 *) ip4_0;
427  copy_src0 = (u64 *) t0->rewrite;
428  /* Copy first 32 octets 8-bytes at a time */
429 #define _(offs) copy_dst0[offs] = copy_src0[offs];
431 #undef _
432  /* Last 4 octets. Hopefully gcc will be our friend */
433  copy_dst_last0 = (u32 *)(&copy_dst0[4]);
434  copy_src_last0 = (u32 *)(&copy_src0[4]);
435  copy_dst_last0[0] = copy_src_last0[0];
436 
437  /* Fix the IP4 checksum and length */
438  if (csum_offload)
439  {
440  ip4_0->length =
441  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
442  b0->flags |=
443  VNET_BUFFER_F_OFFLOAD_IP_CKSUM | VNET_BUFFER_F_IS_IP4;
444  vnet_buffer (b0)->l3_hdr_offset = (u8 *) ip4_0 - b0->data;
445  }
446  else
447  {
448  sum0 = ip4_0->checksum;
449  new_l0 = /* old_l0 always 0, see the rewrite setup */
450  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
451  sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
452  length /* changed member */);
453  ip4_0->checksum = ip_csum_fold (sum0);
454  ip4_0->length = new_l0;
455  }
456 
457  /* Fix UDP length and set source port */
458  udp0 = (udp_header_t *)(ip4_0+1);
459  new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
460  - sizeof (*ip4_0));
461  udp0->length = new_l0;
462  udp0->src_port = flow_hash0;
463 
464  /* UDP checksum only if checksum offload is used */
465  if (csum_offload)
466  {
467  b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
468  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
469  }
470  }
471 
472  else /* ip6 path */
473  {
474  int bogus = 0;
475 
476  /* IP6 VXLAN header should be 56 octects */
477  ASSERT(sizeof(ip6_vxlan_header_t) == 56);
478  ASSERT(vec_len(t0->rewrite) == sizeof(ip6_vxlan_header_t));
479  ip6_0 = vlib_buffer_get_current(b0);
480  /* Copy the fixed header */
481  copy_dst0 = (u64 *) ip6_0;
482  copy_src0 = (u64 *) t0->rewrite;
483  /* Copy first 56 (ip6) octets 8-bytes at a time */
484 #define _(offs) copy_dst0[offs] = copy_src0[offs];
486 #undef _
487  /* Fix IP6 payload length */
488  new_l0 =
489  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
490  - sizeof(*ip6_0));
491  ip6_0->payload_length = new_l0;
492 
493  /* Fix UDP length and set source port */
494  udp0 = (udp_header_t *)(ip6_0+1);
495  udp0->length = new_l0;
496  udp0->src_port = flow_hash0;
497 
498  /* IPv6 UDP checksum is mandatory */
499  if (csum_offload)
500  {
501  b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
502  vnet_buffer (b0)->l3_hdr_offset = (u8 *) ip6_0 - b0->data;
503  vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
504  }
505  else
506  {
508  (vm, b0, ip6_0, &bogus);
509  ASSERT(bogus == 0);
510  if (udp0->checksum == 0)
511  udp0->checksum = 0xffff;
512  }
513  }
514 
515  pkts_encapsulated ++;
516  len0 = vlib_buffer_length_in_chain (vm, b0);
517  stats_n_packets += 1;
518  stats_n_bytes += len0;
519 
520  /* Batch stats increment on the same vxlan tunnel so counter is not
521  incremented per packet. Note stats are still incremented for deleted
522  and admin-down tunnel where packets are dropped. It is not worthwhile
523  to check for this rare case and affect normal path performance. */
524  if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
525  {
526  stats_n_packets -= 1;
527  stats_n_bytes -= len0;
528  if (stats_n_packets)
531  thread_index, stats_sw_if_index,
532  stats_n_packets, stats_n_bytes);
533  stats_n_packets = 1;
534  stats_n_bytes = len0;
535  stats_sw_if_index = sw_if_index0;
536  }
537 
539  {
540  vxlan_encap_trace_t *tr =
541  vlib_add_trace (vm, node, b0, sizeof (*tr));
542  tr->tunnel_index = t0 - vxm->tunnels;
543  tr->vni = t0->vni;
544  }
545  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
546  to_next, n_left_to_next,
547  bi0, next0);
548  }
549 
550  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
551  }
552 
553  /* Do we still need this now that tunnel tx stats is kept? */
555  VXLAN_ENCAP_ERROR_ENCAPSULATED,
556  pkts_encapsulated);
557 
558  /* Increment any remaining batch stats */
559  if (stats_n_packets)
560  {
563  thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
564  node->runtime_data[0] = stats_sw_if_index;
565  }
566 
567  return from_frame->n_vectors;
568 }
569 
570 static uword
572  vlib_node_runtime_t * node,
573  vlib_frame_t * from_frame)
574 {
575  /* Disable chksum offload as setup overhead in tx node is not worthwhile
576  for ip4 header checksum only, unless udp checksum is also required */
577  return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 1,
578  /* csum_offload */ 0);
579 }
580 
581 static uword
583  vlib_node_runtime_t * node,
584  vlib_frame_t * from_frame)
585 {
586  /* Enable checksum offload for ip6 as udp checksum is mandatory, */
587  return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0,
588  /* csum_offload */ 1);
589 }
590 
592  .function = vxlan4_encap,
593  .name = "vxlan4-encap",
594  .vector_size = sizeof (u32),
595  .format_trace = format_vxlan_encap_trace,
596  .type = VLIB_NODE_TYPE_INTERNAL,
598  .error_strings = vxlan_encap_error_strings,
599  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
600  .next_nodes = {
601  [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
602  },
603 };
604 
606 
608  .function = vxlan6_encap,
609  .name = "vxlan6-encap",
610  .vector_size = sizeof (u32),
611  .format_trace = format_vxlan_encap_trace,
612  .type = VLIB_NODE_TYPE_INTERNAL,
614  .error_strings = vxlan_encap_error_strings,
615  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
616  .next_nodes = {
617  [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
618  },
619 };
620 
622 
#define CLIB_UNUSED(x)
Definition: clib.h:79
static void vlib_increment_combined_counter(vlib_combined_counter_main_t *cm, u32 thread_index, u32 index, u64 n_packets, u64 n_bytes)
Increment a combined counter.
Definition: counter.h:211
u8 runtime_data[0]
Function dependent node-runtime data.
Definition: node.h:464
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
vnet_interface_main_t interface_main
Definition: vnet.h:56
#define foreach_vxlan_encap_error
Definition: encap.c:23
vxlan_encap_error_t
Definition: encap.c:32
#define NULL
Definition: clib.h:55
uword ip_csum_t
Definition: ip_packet.h:90
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
VLIB_NODE_FUNCTION_MULTIARCH(l2t_encap_node, l2t_encap_node_fn)
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:107
vnet_main_t * vnet_main
Definition: vxlan.h:158
static char * vxlan_encap_error_strings[]
Definition: encap.c:26
#define always_inline
Definition: clib.h:92
vlib_combined_counter_main_t * combined_sw_if_counters
Definition: interface.h:672
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:171
unsigned long u64
Definition: types.h:89
u8 * rewrite
Definition: vxlan.h:70
#define foreach_fixed_header4_offset
Definition: encap.c:62
static u32 vnet_l2_compute_flow_hash(vlib_buffer_t *b)
Definition: l2_input.h:257
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:195
vxlan_main_t vxlan_main
Definition: vxlan.c:41
#define PREDICT_FALSE(x)
Definition: clib.h:105
u32 node_index
Node index.
Definition: node.h:437
#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:218
#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:364
u8 * format_vxlan_encap_trace(u8 *s, va_list *args)
Definition: encap.c:49
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1158
u16 n_vectors
Definition: node.h:344
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:221
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:82
vlib_main_t * vm
Definition: buffer.c:283
#define VLIB_BUFFER_IS_TRACED
Definition: buffer.h:93
#define ARRAY_LEN(x)
Definition: clib.h:59
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:454
u16 ip6_tcp_udp_icmp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0, ip6_header_t *ip0, int *bogus_lengthp)
Definition: ip6_forward.c:1133
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:456
#define foreach_fixed_header6_offset
Definition: encap.c:65
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:208
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
static uword vxlan_encap_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, u8 is_ip4, u8 csum_offload)
Definition: encap.c:69
Definition: defs.h:47
unsigned short u16
Definition: types.h:57
u16 payload_length
Definition: ip6_packet.h:332
i64 word
Definition: types.h:111
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:182
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
static uword vxlan6_encap(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: encap.c:582
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:267
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:139
vxlan_encap_next_t
Definition: encap.c:39
#define vnet_buffer(b)
Definition: buffer.h:326
vlib_node_registration_t vxlan4_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan4_encap_node)
Definition: encap.c:591
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
u8 data[0]
Packet data.
Definition: buffer.h:159
vlib_node_registration_t vxlan6_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan6_encap_node)
Definition: encap.c:607
dpo_id_t next_dpo
Definition: vxlan.h:73
u16 dpoi_next_node
The next VLIB node to follow.
Definition: dpo.h:178
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:67
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:75
static uword vxlan4_encap(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: encap.c:571
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
vxlan_tunnel_t * tunnels
Definition: vxlan.h:136
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:145