FD.io VPP  v20.05.1-6-gf53edbc3b
Vector Packet Processing
mpls_label_dpo.c
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1 /*
2  * Copyright (c) 2016 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 
16 #include <vnet/ip/ip.h>
18 #include <vnet/mpls/mpls.h>
19 #include <vnet/dpo/drop_dpo.h>
20 
21 #ifndef CLIB_MARCH_VARIANT
22 /*
23  * pool of all MPLS Label DPOs
24  */
26 
27 /**
28  * Strings for the flags
29  */
31 
32 /**
33  * registered DPO types for each of the label sub-types. And there's a
34  * subtype for each of the flag combinations.
35  */
37 
38 static mpls_label_dpo_t *
40 {
41  mpls_label_dpo_t *mld;
42 
43  pool_get_aligned(mpls_label_dpo_pool, mld, CLIB_CACHE_LINE_BYTES);
44  clib_memset(mld, 0, sizeof(*mld));
45 
46  dpo_reset(&mld->mld_dpo);
47 
48  return (mld);
49 }
50 
51 static index_t
53 {
54  return (mld - mpls_label_dpo_pool);
55 }
56 
57 void
59  mpls_eos_bit_t eos,
60  dpo_proto_t payload_proto,
62  const dpo_id_t *parent,
63  dpo_id_t *dpo)
64 {
65  mpls_label_dpo_t *mld;
66  dpo_type_t dtype;
67  u32 ii;
68 
69  if ((DPO_PROTO_IP4 != payload_proto) &&
70  (DPO_PROTO_IP6 != payload_proto))
71  {
72  /*
73  * remove unsupported configuration
74  */
76  }
77 
78  mld = mpls_label_dpo_alloc();
79  mld->mld_flags = flags;
80  dtype = mpls_label_dpo_types[flags];
81 
82  if (MPLS_LABEL_DPO_MAX_N_LABELS < vec_len(label_stack))
83  {
84  clib_warning("Label stack size exceeded");
85  dpo_stack(dtype,
86  mld->mld_payload_proto,
87  &mld->mld_dpo,
89  }
90  else
91  {
92  mld->mld_n_labels = vec_len(label_stack);
93  mld->mld_n_hdr_bytes = mld->mld_n_labels * sizeof(mld->mld_hdr[0]);
94  mld->mld_payload_proto = payload_proto;
95 
96  /*
97  * construct label rewrite headers for each value passed.
98  * get the header in network byte order since we will paint it
99  * on a packet in the data-plane
100  */
101  for (ii = 0; ii < mld->mld_n_labels-1; ii++)
102  {
104  label_stack[ii].fml_value);
106  label_stack[ii].fml_exp);
108  MPLS_NON_EOS);
109  if (0 != label_stack[ii].fml_ttl)
110  {
112  label_stack[ii].fml_ttl);
113  }
114  else
115  {
118  }
119  mld->mld_hdr[ii].label_exp_s_ttl =
120  clib_host_to_net_u32(mld->mld_hdr[ii].label_exp_s_ttl);
121  }
122 
123  /*
124  * the inner most label
125  */
126  ii = mld->mld_n_labels-1;
127 
129  label_stack[ii].fml_value);
131  label_stack[ii].fml_exp);
133  if (0 != label_stack[ii].fml_ttl)
134  {
136  label_stack[ii].fml_ttl);
137  }
138  else
139  {
142  }
143  mld->mld_hdr[ii].label_exp_s_ttl =
144  clib_host_to_net_u32(mld->mld_hdr[ii].label_exp_s_ttl);
145 
146  /*
147  * pipe/uniform mode is only supported for the bottom of stack label
148  */
149  if (FIB_MPLS_LSP_MODE_UNIFORM == label_stack[ii].fml_mode)
150  {
152  }
153  else
154  {
156  }
157  dtype = mpls_label_dpo_types[mld->mld_flags];
158 
159  /*
160  * stack this label object on its parent.
161  */
162  dpo_stack(dtype,
163  mld->mld_payload_proto,
164  &mld->mld_dpo,
165  parent);
166  }
167 
168  dpo_set(dpo,
169  dtype,
170  mld->mld_payload_proto,
172 }
173 
174 u8*
175 format_mpls_label_dpo_flags (u8 *s, va_list *args)
176 {
177  mpls_label_dpo_flags_t flags = va_arg (*args, int);
179 
181  {
182  if ((1 << attr) & flags)
183  {
184  s = format(s, "%s,", mpls_label_dpo_attr_names[attr]);
185  }
186  }
187 
188  return (s);
189 }
190 
191 u8*
192 format_mpls_label_dpo (u8 *s, va_list *args)
193 {
194  index_t index = va_arg (*args, index_t);
195  u32 indent = va_arg (*args, u32);
197  mpls_label_dpo_t *mld;
198  u32 ii;
199 
200  if (pool_is_free_index(mpls_label_dpo_pool, index))
201  {
202  /*
203  * the packet trace can be printed after the DPO has been deleted
204  */
205  return (format(s, "mpls-label[???,%d]:", index));
206  }
207 
208  mld = mpls_label_dpo_get(index);
209  s = format(s, "mpls-label[%U@%d]:",
211  (int) mld->mld_flags, index);
212 
213  for (ii = 0; ii < mld->mld_n_labels; ii++)
214  {
215  hdr.label_exp_s_ttl =
216  clib_net_to_host_u32(mld->mld_hdr[ii].label_exp_s_ttl);
217  s = format(s, "%U", format_mpls_header, hdr);
218  }
219 
220  s = format(s, "\n%U", format_white_space, indent);
221  s = format(s, "%U", format_dpo_id, &mld->mld_dpo, indent+2);
222 
223  return (s);
224 }
225 
226 static void
228 {
229  mpls_label_dpo_t *mld;
230 
231  mld = mpls_label_dpo_get(dpo->dpoi_index);
232 
233  mld->mld_locks++;
234 }
235 
236 static void
238 {
239  mpls_label_dpo_t *mld;
240 
241  mld = mpls_label_dpo_get(dpo->dpoi_index);
242 
243  mld->mld_locks--;
244 
245  if (0 == mld->mld_locks)
246  {
247  dpo_reset(&mld->mld_dpo);
248  pool_put(mpls_label_dpo_pool, mld);
249  }
250 }
251 #endif /* CLIB_MARCH_VARIANT */
252 
253 /**
254  * @brief A struct to hold tracing information for the MPLS label imposition
255  * node.
256  */
258 {
259  /**
260  * The MPLS header imposed
261  */
263 
264  /**
265  * TTL imposed - only valid for uniform LSPs
266  */
268 
269  /**
270  * TTL imposed - only valid for uniform LSPs
271  */
274 
277  mpls_label_dpo_t *mld0)
278 {
279  mpls_unicast_header_t *hdr0;
280 
281  vlib_buffer_advance(b0, -(mld0->mld_n_hdr_bytes));
282 
283  hdr0 = vlib_buffer_get_current(b0);
284 
285  if (1 == mld0->mld_n_labels)
286  {
287  /* optimise for the common case of one label */
288  *hdr0 = mld0->mld_hdr[0];
289  }
290  else
291  {
292  clib_memcpy_fast(hdr0, mld0->mld_hdr, mld0->mld_n_hdr_bytes);
293  hdr0 = hdr0 + (mld0->mld_n_labels - 1);
294  }
295 
296  return (hdr0);
297 }
298 
299 /**
300  * Paint on an MPLS label and fixup the TTL
301  */
304  mpls_label_dpo_t *mld0,
305  u8 ttl0)
306 {
307  mpls_unicast_header_t *hdr0;
308 
309  hdr0 = mpls_label_paint(b0, mld0);
310 
311  /* fixup the TTL for the inner most label */
312  ((char*)hdr0)[3] = ttl0;
313 
314  return (hdr0);
315 }
316 
317 /**
318  * Paint on an MPLS label and fixup the TTL and EXP bits.
319  */
322  mpls_label_dpo_t *mld0,
323  u8 ttl0,
324  u8 exp0)
325 {
326  mpls_unicast_header_t *hdr0;
327 
328  hdr0 = mpls_label_paint_w_ttl(b0, mld0, ttl0);
329 
330  /* fixup the EXP for the inner most label */
331  ((char*)hdr0)[2] |= (exp0 << 1);
332 
333  return (hdr0);
334 }
335 
336 /**
337  * Paint on an MPLS label and fixup the TTL and EXP bits
338  * When the EXP bits are *already* bit shift to the correct place in
339  * in the 2nd byte (i.e. they were read from another label)
340  */
343  mpls_label_dpo_t *mld0,
344  u8 ttl0,
345  u8 exp0)
346 {
347  mpls_unicast_header_t *hdr0;
348 
349  hdr0 = mpls_label_paint_w_ttl(b0, mld0, ttl0);
350 
351  /* fixup the EXP for the inner most label */
352  ((char*)hdr0)[2] |= exp0;
353 
354  return (hdr0);
355 }
356 
360  vlib_frame_t * from_frame,
361  const dpo_proto_t dproto,
363 {
364  u32 n_left_from, next_index, * from, * to_next;
365 
366  from = vlib_frame_vector_args (from_frame);
367  n_left_from = from_frame->n_vectors;
368 
369  next_index = node->cached_next_index;
370 
371  while (n_left_from > 0)
372  {
373  u32 n_left_to_next;
374 
375  vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
376 
377  while (n_left_from >= 8 && n_left_to_next >= 4)
378  {
379  u32 bi0, mldi0, bi1, mldi1, bi2, mldi2, bi3, mldi3;
380  mpls_unicast_header_t *hdr0, *hdr1, *hdr2, *hdr3;
381  mpls_label_dpo_t *mld0, *mld1, *mld2, *mld3;
382  vlib_buffer_t * b0, *b1, * b2, *b3;
383  u32 next0, next1, next2, next3;
384  u8 ttl0, ttl1, ttl2, ttl3;
385  u8 exp0, exp1, exp2, exp3;
386 
387  bi0 = to_next[0] = from[0];
388  bi1 = to_next[1] = from[1];
389  bi2 = to_next[2] = from[2];
390  bi3 = to_next[3] = from[3];
391 
392  /* Prefetch next iteration. */
393  {
394  vlib_buffer_t * p2, * p3, *p4, *p5;
395 
396  p2 = vlib_get_buffer (vm, from[2]);
397  p3 = vlib_get_buffer (vm, from[3]);
398  p4 = vlib_get_buffer (vm, from[4]);
399  p5 = vlib_get_buffer (vm, from[5]);
400 
401  vlib_prefetch_buffer_header (p2, STORE);
402  vlib_prefetch_buffer_header (p3, STORE);
403  vlib_prefetch_buffer_header (p4, STORE);
404  vlib_prefetch_buffer_header (p5, STORE);
405 
406  CLIB_PREFETCH (p2->data, sizeof (hdr0[0]), STORE);
407  CLIB_PREFETCH (p3->data, sizeof (hdr0[0]), STORE);
408  CLIB_PREFETCH (p4->data, sizeof (hdr0[0]), STORE);
409  CLIB_PREFETCH (p5->data, sizeof (hdr0[0]), STORE);
410  }
411 
412  from += 4;
413  to_next += 4;
414  n_left_from -= 4;
415  n_left_to_next -= 4;
416 
417  b0 = vlib_get_buffer (vm, bi0);
418  b1 = vlib_get_buffer (vm, bi1);
419  b2 = vlib_get_buffer (vm, bi2);
420  b3 = vlib_get_buffer (vm, bi3);
421 
422  /* dst lookup was done by ip4 lookup */
423  mldi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
424  mldi1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX];
425  mldi2 = vnet_buffer(b2)->ip.adj_index[VLIB_TX];
426  mldi3 = vnet_buffer(b3)->ip.adj_index[VLIB_TX];
427  mld0 = mpls_label_dpo_get(mldi0);
428  mld1 = mpls_label_dpo_get(mldi1);
429  mld2 = mpls_label_dpo_get(mldi2);
430  mld3 = mpls_label_dpo_get(mldi3);
431 
432  if (DPO_PROTO_MPLS != dproto)
433  {
434  /*
435  * These are the non-MPLS payload imposition cases
436  */
437  if (DPO_PROTO_IP4 == dproto)
438  {
443 
444  if (!(MPLS_LABEL_DPO_FLAG_NO_IP_TTL_DECR & flags))
445  {
446  /*
447  * decrement the TTL on ingress to the LSP
448  */
449  u32 checksum0;
450  u32 checksum1;
451  u32 checksum2;
452  u32 checksum3;
453 
454  checksum0 = ip0->checksum + clib_host_to_net_u16 (0x0100);
455  checksum1 = ip1->checksum + clib_host_to_net_u16 (0x0100);
456  checksum2 = ip2->checksum + clib_host_to_net_u16 (0x0100);
457  checksum3 = ip3->checksum + clib_host_to_net_u16 (0x0100);
458 
459  checksum0 += checksum0 >= 0xffff;
460  checksum1 += checksum1 >= 0xffff;
461  checksum2 += checksum2 >= 0xffff;
462  checksum3 += checksum3 >= 0xffff;
463 
464  ip0->checksum = checksum0;
465  ip1->checksum = checksum1;
466  ip2->checksum = checksum2;
467  ip3->checksum = checksum3;
468 
469  ip0->ttl -= 1;
470  ip1->ttl -= 1;
471  ip2->ttl -= 1;
472  ip3->ttl -= 1;
473  }
474 
476  {
477  ttl1 = ip1->ttl;
478  ttl0 = ip0->ttl;
479  ttl3 = ip3->ttl;
480  ttl2 = ip2->ttl;
481  /* by default copy the 3 most significant bits */
482  exp0 = ip_dscp_to_mpls_exp(ip0->tos);
483  exp1 = ip_dscp_to_mpls_exp(ip1->tos);
484  exp2 = ip_dscp_to_mpls_exp(ip2->tos);
485  exp3 = ip_dscp_to_mpls_exp(ip3->tos);
486  }
487 
488  /* save the payload proto information in mpls opaque */
489  vnet_buffer(b0)->mpls.pyld_proto = DPO_PROTO_IP4;
490  vnet_buffer(b1)->mpls.pyld_proto = DPO_PROTO_IP4;
491  vnet_buffer(b2)->mpls.pyld_proto = DPO_PROTO_IP4;
492  vnet_buffer(b3)->mpls.pyld_proto = DPO_PROTO_IP4;
493  }
494  else if (DPO_PROTO_IP6 == dproto)
495  {
496  /*
497  * decrement the TTL on ingress to the LSP
498  */
503 
504  if (!(MPLS_LABEL_DPO_FLAG_NO_IP_TTL_DECR & flags))
505  {
506  ip0->hop_limit -= 1;
507  ip1->hop_limit -= 1;
508  ip2->hop_limit -= 1;
509  ip3->hop_limit -= 1;
510  }
512  {
513  ttl0 = ip0->hop_limit;
514  ttl1 = ip1->hop_limit;
515  ttl2 = ip2->hop_limit;
516  ttl3 = ip3->hop_limit;
517  /* by default copy the 3 most significant bits */
518  exp0 = ip_dscp_to_mpls_exp(
520  exp1 = ip_dscp_to_mpls_exp(
522  exp2 = ip_dscp_to_mpls_exp(
524  exp3 = ip_dscp_to_mpls_exp(
526  }
527 
528  /* save the payload proto information in mpls opaque */
529  vnet_buffer(b0)->mpls.pyld_proto = DPO_PROTO_IP6;
530  vnet_buffer(b1)->mpls.pyld_proto = DPO_PROTO_IP6;
531  vnet_buffer(b2)->mpls.pyld_proto = DPO_PROTO_IP6;
532  vnet_buffer(b3)->mpls.pyld_proto = DPO_PROTO_IP6;
533  }
534  else
535  {
536  /*
537  * nothing to change in the ethernet header
538  */
539  ttl0 = ttl1 = ttl2 = ttl3 = MPLS_LABEL_DEFAULT_TTL;
540  exp0 = exp1 = exp2 = exp3 = MPLS_LABEL_DEFAULT_EXP;
541  }
542  /*
543  * These are the non-MPLS payload imposition cases.
544  * Based on the LSP mode either, for uniform, copy down the TTL
545  * and EXP from the payload or, for pipe mode, slap on the value
546  * requested from config
547  */
549  {
550  hdr0 = mpls_label_paint_w_ttl_exp(b0, mld0, ttl0, exp0);
551  hdr1 = mpls_label_paint_w_ttl_exp(b1, mld1, ttl1, exp1);
552  hdr2 = mpls_label_paint_w_ttl_exp(b2, mld2, ttl2, exp2);
553  hdr3 = mpls_label_paint_w_ttl_exp(b3, mld3, ttl3, exp3);
554  }
555  else
556  {
557  hdr0 = mpls_label_paint(b0, mld0);
558  hdr1 = mpls_label_paint(b1, mld1);
559  hdr2 = mpls_label_paint(b2, mld2);
560  hdr3 = mpls_label_paint(b3, mld3);
561  }
562  }
563  else
564  {
565  /*
566  * else, the packet to be encapped is an MPLS packet
567  * there are two cases to consider:
568  * 1 - this is an MPLS label swap at an LSP midpoint.
569  * recognisable because mpls.first = 1. In this case the
570  * TTL must be set to the current value -1.
571  * 2 - The MPLS packet is recursing (or being injected into)
572  * this LSP, in which case the pipe/uniform rules apply
573  *
574  */
575  if (PREDICT_TRUE(vnet_buffer(b0)->mpls.first))
576  {
577  /*
578  * The first label to be imposed on the packet. this is a
579  * label swap.in which case we stashed the TTL and EXP bits
580  * in the packet in the lookup node
581  */
582  ASSERT(0 != vnet_buffer (b0)->mpls.ttl);
583 
584  ttl0 = vnet_buffer(b0)->mpls.ttl - 1;
585  exp0 = vnet_buffer(b0)->mpls.exp;
586  hdr0 = mpls_label_paint_w_ttl_exp(b0, mld0, ttl0, exp0);
587  }
588  else
589  {
590  /*
591  * not the first label. implying we are recusring down a
592  * chain of output labels. Each layer is considered a new
593  * LSP - hence the TTL/EXP are pipe/uniform handled
594  */
596  {
597  hdr0 = vlib_buffer_get_current(b0);
598  ttl0 = ((u8*)hdr0)[3];
599  exp0 = ((u8*)hdr0)[2] & 0xe;
600  hdr0 = mpls_label_paint_w_ttl_mpls_exp(b0, mld0, ttl0, exp0);
601  }
602  else
603  {
604  hdr0 = mpls_label_paint(b0, mld0);
605  }
606  }
607  if (PREDICT_TRUE(vnet_buffer(b1)->mpls.first))
608  {
609  ASSERT(0 != vnet_buffer (b1)->mpls.ttl);
610 
611  ttl1 = vnet_buffer(b1)->mpls.ttl - 1;
612  exp1 = vnet_buffer(b1)->mpls.exp;
613  hdr1 = mpls_label_paint_w_ttl_exp(b1, mld1, ttl1, exp1);
614  }
615  else
616  {
618  {
619  hdr1 = vlib_buffer_get_current(b1);
620  ttl1 = ((u8*)hdr1)[3];
621  exp1 = ((u8*)hdr1)[2] & 0xe;
622  hdr1 = mpls_label_paint_w_ttl_mpls_exp(b1, mld1, ttl1, exp1);
623  }
624  else
625  {
626  hdr1 = mpls_label_paint(b1, mld1);
627  }
628  }
629  if (PREDICT_TRUE(vnet_buffer(b2)->mpls.first))
630  {
631  ASSERT(0 != vnet_buffer (b2)->mpls.ttl);
632 
633  ttl2 = vnet_buffer(b2)->mpls.ttl - 1;
634  exp2 = vnet_buffer(b2)->mpls.exp;
635  hdr2 = mpls_label_paint_w_ttl_exp(b2, mld2, ttl2, exp2);
636  }
637  else
638  {
640  {
641  hdr2 = vlib_buffer_get_current(b2);
642  ttl2 = ((u8*)hdr2)[3];
643  exp2 = ((u8*)hdr2)[2] & 0xe;
644  hdr2 = mpls_label_paint_w_ttl_mpls_exp(b2, mld2, ttl2, exp2);
645  }
646  else
647  {
648  hdr2 = mpls_label_paint(b2, mld2);
649  }
650  }
651  if (PREDICT_TRUE(vnet_buffer(b3)->mpls.first))
652  {
653  ASSERT(0 != vnet_buffer (b3)->mpls.ttl);
654 
655  ttl3 = vnet_buffer(b3)->mpls.ttl - 1;
656  exp3 = vnet_buffer(b3)->mpls.exp;
657  hdr3 = mpls_label_paint_w_ttl_exp(b3, mld3, ttl3, exp3);
658  }
659  else
660  {
662  {
663  hdr3 = vlib_buffer_get_current(b3);
664  ttl3 = ((u8*)hdr3)[3];
665  exp3 = ((u8*)hdr3)[2] & 0xe;
666  hdr3 = mpls_label_paint_w_ttl_mpls_exp(b3, mld3, ttl3, exp3);
667  }
668  else
669  {
670  hdr3 = mpls_label_paint(b3, mld3);
671  }
672  }
673 
674  vnet_buffer(b0)->mpls.first = 0;
675  vnet_buffer(b1)->mpls.first = 0;
676  vnet_buffer(b2)->mpls.first = 0;
677  vnet_buffer(b3)->mpls.first = 0;
678  }
679 
680  next0 = mld0->mld_dpo.dpoi_next_node;
681  next1 = mld1->mld_dpo.dpoi_next_node;
682  next2 = mld2->mld_dpo.dpoi_next_node;
683  next3 = mld3->mld_dpo.dpoi_next_node;
684 
685  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mld0->mld_dpo.dpoi_index;
686  vnet_buffer(b1)->ip.adj_index[VLIB_TX] = mld1->mld_dpo.dpoi_index;
687  vnet_buffer(b2)->ip.adj_index[VLIB_TX] = mld2->mld_dpo.dpoi_index;
688  vnet_buffer(b3)->ip.adj_index[VLIB_TX] = mld3->mld_dpo.dpoi_index;
689 
690  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
691  {
693  vlib_add_trace (vm, node, b0, sizeof (*tr));
694  tr->hdr = *hdr0;
696  {
697  tr->ttl = ttl0;
698  tr->exp = exp0;
699  }
700  else
701  {
702  tr->ttl = tr->exp = 0;
703  }
704  }
705  if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
706  {
708  vlib_add_trace (vm, node, b1, sizeof (*tr));
709  tr->hdr = *hdr1;
711  {
712  tr->ttl = ttl1;
713  tr->exp = exp1;
714  }
715  else
716  {
717  tr->ttl = tr->exp = 0;
718  }
719  }
720  if (PREDICT_FALSE(b2->flags & VLIB_BUFFER_IS_TRACED))
721  {
723  vlib_add_trace (vm, node, b2, sizeof (*tr));
724  tr->hdr = *hdr2;
726  {
727  tr->ttl = ttl2;
728  tr->exp = exp2;
729  }
730  else
731  {
732  tr->ttl = tr->exp = 0;
733  }
734  }
735  if (PREDICT_FALSE(b3->flags & VLIB_BUFFER_IS_TRACED))
736  {
738  vlib_add_trace (vm, node, b3, sizeof (*tr));
739  tr->hdr = *hdr3;
741  {
742  tr->ttl = ttl3;
743  tr->exp = exp3;
744  }
745  else
746  {
747  tr->ttl = tr->exp = 0;
748  }
749  }
750 
751  vlib_validate_buffer_enqueue_x4(vm, node, next_index, to_next,
752  n_left_to_next,
753  bi0, bi1, bi2, bi3,
754  next0, next1, next2, next3);
755  }
756 
757  while (n_left_from > 0 && n_left_to_next > 0)
758  {
759  mpls_unicast_header_t *hdr0;
760  mpls_label_dpo_t *mld0;
761  vlib_buffer_t * b0;
762  u32 bi0, mldi0;
763  u8 ttl0, exp0;
764  u32 next0;
765 
766  bi0 = from[0];
767  to_next[0] = bi0;
768  from += 1;
769  to_next += 1;
770  n_left_from -= 1;
771  n_left_to_next -= 1;
772 
773  b0 = vlib_get_buffer (vm, bi0);
774 
775  /* dst lookup was done by ip4 lookup */
776  mldi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
777  mld0 = mpls_label_dpo_get(mldi0);
778 
779  if (DPO_PROTO_MPLS != dproto)
780  {
781  if (DPO_PROTO_IP4 == dproto)
782  {
783  /*
784  * decrement the TTL on ingress to the LSP
785  */
787  if (!(MPLS_LABEL_DPO_FLAG_NO_IP_TTL_DECR & flags))
788  {
789  u32 checksum0;
790 
791  checksum0 = ip0->checksum + clib_host_to_net_u16 (0x0100);
792  checksum0 += checksum0 >= 0xffff;
793 
794  ip0->checksum = checksum0;
795  ip0->ttl -= 1;
796  }
798  {
799  ttl0 = ip0->ttl;
800  exp0 = ip_dscp_to_mpls_exp(ip0->tos);
801  }
802 
803  /* save the payload proto information in mpls opaque */
804  vnet_buffer(b0)->mpls.pyld_proto = DPO_PROTO_IP4;
805  }
806  else if (DPO_PROTO_IP6 == dproto)
807  {
808  /*
809  * decrement the TTL on ingress to the LSP
810  */
812 
813  if (!(MPLS_LABEL_DPO_FLAG_NO_IP_TTL_DECR & flags))
814  {
815  ip0->hop_limit -= 1;
816  }
818  {
819  ttl0 = ip0->hop_limit;
820  exp0 = ip_dscp_to_mpls_exp(
822  }
823 
824  /* save the payload proto information in mpls opaque */
825  vnet_buffer(b0)->mpls.pyld_proto = DPO_PROTO_IP6;
826  }
827  else
828  {
829  /*
830  * nothing to change in the ethernet header
831  */
832  ttl0 = MPLS_LABEL_DEFAULT_TTL;
833  exp0 = MPLS_LABEL_DEFAULT_EXP;
834  }
835 
836  /*
837  * These are the non-MPLS payload imposition cases.
838  * Based on the LSP mode either, for uniform, copy down the TTL
839  * from the payload or, for pipe mode, slap on the value
840  * requested from config
841  */
843  {
844  hdr0 = mpls_label_paint_w_ttl_exp(b0, mld0, ttl0, exp0);
845  }
846  else
847  {
848  hdr0 = mpls_label_paint(b0, mld0);
849  }
850  }
851  else
852  {
853  if (PREDICT_TRUE(vnet_buffer(b0)->mpls.first))
854  {
855  ASSERT(0 != vnet_buffer (b0)->mpls.ttl);
856 
857  ttl0 = vnet_buffer(b0)->mpls.ttl - 1;
858  exp0 = vnet_buffer(b0)->mpls.exp;
859  hdr0 = mpls_label_paint_w_ttl_exp(b0, mld0, ttl0, exp0);
860  }
861  else
862  {
864  {
865  hdr0 = vlib_buffer_get_current(b0);
866  ttl0 = ((u8*)hdr0)[3];
867  exp0 = ((u8*)hdr0)[2] & 0xe;
868  hdr0 = mpls_label_paint_w_ttl_mpls_exp(b0, mld0, ttl0, exp0);
869  }
870  else
871  {
872  hdr0 = mpls_label_paint(b0, mld0);
873  }
874  }
875 
876  vnet_buffer(b0)->mpls.first = 0;
877  }
878 
879  next0 = mld0->mld_dpo.dpoi_next_node;
880  vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mld0->mld_dpo.dpoi_index;
881 
882  if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
883  {
885  vlib_add_trace (vm, node, b0, sizeof (*tr));
886  tr->hdr = *hdr0;
888  {
889  tr->ttl = ttl0;
890  tr->exp = exp0;
891  }
892  else
893  {
894  tr->ttl = tr->exp = 0;
895  }
896  }
897 
898  vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
899  n_left_to_next, bi0, next0);
900  }
901  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
902  }
903  return from_frame->n_vectors;
904 }
905 
906 static u8 *
908 {
909  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
910  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
913  u32 indent;
914 
915  t = va_arg (*args, mpls_label_imposition_trace_t *);
916  indent = format_get_indent (s);
917  hdr.label_exp_s_ttl = clib_net_to_host_u32(t->hdr.label_exp_s_ttl);
918 
919  s = format (s, "%Umpls-header:%U",
920  format_white_space, indent,
921  format_mpls_header, hdr);
922  return (s);
923 }
924 
928 {
932 }
933 
935  .name = "mpls-label-imposition-pipe",
936  .vector_size = sizeof (u32),
937 
938  .format_trace = format_mpls_label_imposition_trace,
939  .n_next_nodes = 1,
940  .next_nodes = {
941  [0] = "mpls-drop",
942  }
943 };
944 
948 {
952 }
953 
955  .name = "ip4-mpls-label-imposition-pipe",
956  .vector_size = sizeof (u32),
957 
958  .format_trace = format_mpls_label_imposition_trace,
959  .n_next_nodes = 1,
960  .next_nodes = {
961  [0] = "ip4-drop",
962  }
963 };
964 
968 {
972 }
973 
975  .name = "ip6-mpls-label-imposition-pipe",
976  .vector_size = sizeof (u32),
977 
978  .format_trace = format_mpls_label_imposition_trace,
979  .n_next_nodes = 1,
980  .next_nodes = {
981  [0] = "ip6-drop",
982  }
983 };
984 
988 {
992 }
993 
995  .name = "ethernet-mpls-label-imposition-pipe",
996  .vector_size = sizeof (u32),
997 
998  .format_trace = format_mpls_label_imposition_trace,
999  .n_next_nodes = 1,
1000  .next_nodes = {
1001  [0] = "error-drop",
1002  }
1003 };
1004 
1007  vlib_frame_t * frame)
1008 {
1012 }
1013 
1015  .name = "mpls-label-imposition-uniform",
1016  .vector_size = sizeof (u32),
1017 
1018  .format_trace = format_mpls_label_imposition_trace,
1019  .n_next_nodes = 1,
1020  .next_nodes = {
1021  [0] = "mpls-drop",
1022  }
1023 };
1024 
1027  vlib_frame_t * frame)
1028 {
1030  DPO_PROTO_IP4,
1032 }
1033 
1035  .name = "ip4-mpls-label-imposition-uniform",
1036  .vector_size = sizeof (u32),
1037 
1038  .format_trace = format_mpls_label_imposition_trace,
1039  .n_next_nodes = 1,
1040  .next_nodes = {
1041  [0] = "ip4-drop",
1042  }
1043 };
1044 
1047  vlib_frame_t * frame)
1048 {
1050  DPO_PROTO_IP6,
1052 }
1053 
1055  .name = "ip6-mpls-label-imposition-uniform",
1056  .vector_size = sizeof (u32),
1057 
1058  .format_trace = format_mpls_label_imposition_trace,
1059  .n_next_nodes = 1,
1060  .next_nodes = {
1061  [0] = "ip6-drop",
1062  }
1063 };
1064 
1067  vlib_frame_t * frame)
1068 {
1072 }
1073 
1075  .name = "ethernet-mpls-label-imposition-uniform",
1076  .vector_size = sizeof (u32),
1077 
1078  .format_trace = format_mpls_label_imposition_trace,
1079  .n_next_nodes = 1,
1080  .next_nodes = {
1081  [0] = "error-drop",
1082  }
1083 };
1084 
1085 
1088  vlib_frame_t * frame)
1089 {
1091  DPO_PROTO_IP4,
1093 }
1094 
1096  .name = "ip4-mpls-label-imposition-pipe-no-ip-ttl-decr",
1097  .vector_size = sizeof (u32),
1098 
1099  .format_trace = format_mpls_label_imposition_trace,
1100  .n_next_nodes = 1,
1101  .next_nodes = {
1102  [0] = "ip4-drop",
1103  }
1104 };
1105 
1108  vlib_frame_t * frame)
1109 {
1111  DPO_PROTO_IP6,
1113 }
1114 
1116  .name = "ip6-mpls-label-imposition-pipe-no-ip-ttl-decr",
1117  .vector_size = sizeof (u32),
1118 
1119  .format_trace = format_mpls_label_imposition_trace,
1120  .n_next_nodes = 1,
1121  .next_nodes = {
1122  [0] = "ip6-drop",
1123  }
1124 };
1125 
1128  vlib_frame_t * frame)
1129 {
1131  DPO_PROTO_IP4,
1134 }
1135 
1137  .name = "ip4-mpls-label-imposition-uniform-no-ip-ttl-decr",
1138  .vector_size = sizeof (u32),
1139 
1140  .format_trace = format_mpls_label_imposition_trace,
1141  .n_next_nodes = 1,
1142  .next_nodes = {
1143  [0] = "ip4-drop",
1144  }
1145 };
1146 
1149  vlib_frame_t * frame)
1150 {
1152  DPO_PROTO_IP6,
1155 }
1156 
1158  .name = "ip6-mpls-label-imposition-uniform-no-ip-ttl-decr",
1159  .vector_size = sizeof (u32),
1160 
1161  .format_trace = format_mpls_label_imposition_trace,
1162  .n_next_nodes = 1,
1163  .next_nodes = {
1164  [0] = "ip6-drop",
1165  }
1166 };
1167 
1168 
1169 #ifndef CLIB_MARCH_VARIANT
1170 static void
1172 {
1173  fib_show_memory_usage("MPLS label",
1174  pool_elts(mpls_label_dpo_pool),
1175  pool_len(mpls_label_dpo_pool),
1176  sizeof(mpls_label_dpo_t));
1177 }
1178 
1179 /**
1180  * Interpose a label DPO. used in the FIB unit tests
1181  */
1182 static void
1184  const dpo_id_t *parent,
1185  dpo_id_t *clone)
1186 {
1187  mpls_label_dpo_t *mld, *mld_clone;
1188 
1189  mld_clone = mpls_label_dpo_alloc();
1190  mld = mpls_label_dpo_get(original->dpoi_index);
1191 
1192  mld_clone->mld_locks = 0;
1193  clib_memcpy_fast(&mld_clone->mld_hdr,
1194  &mld->mld_hdr,
1195  sizeof(mld_clone->mld_hdr));
1196  mld_clone->mld_payload_proto = mld->mld_payload_proto;
1197  mld_clone->mld_n_labels = mld->mld_n_labels;
1198  mld_clone->mld_n_hdr_bytes = mld->mld_n_hdr_bytes;
1199 
1201  mld_clone->mld_payload_proto,
1202  &mld_clone->mld_dpo,
1203  parent);
1204 
1205  dpo_set(clone,
1206  mpls_label_dpo_types[MPLS_LABEL_DPO_FLAG_NONE],
1207  mld_clone->mld_payload_proto,
1208  mpls_label_dpo_get_index(mld_clone));
1209 }
1210 
1211 const static dpo_vft_t mld_vft = {
1213  .dv_unlock = mpls_label_dpo_unlock,
1214  .dv_format = format_mpls_label_dpo,
1215  .dv_mem_show = mpls_label_dpo_mem_show,
1216  .dv_mk_interpose = mpls_label_interpose,
1217 };
1218 
1219 const static char* const mpls_label_imp_pipe_ip4_nodes[] =
1220 {
1221  "ip4-mpls-label-imposition-pipe",
1222  NULL,
1223 };
1224 const static char* const mpls_label_imp_pipe_ip6_nodes[] =
1225 {
1226  "ip6-mpls-label-imposition-pipe",
1227  NULL,
1228 };
1229 const static char* const mpls_label_imp_pipe_mpls_nodes[] =
1230 {
1231  "mpls-label-imposition-pipe",
1232  NULL,
1233 };
1234 const static char* const mpls_label_imp_pipe_ethernet_nodes[] =
1235 {
1236  "ethernet-mpls-label-imposition-pipe",
1237  NULL,
1238 };
1239 
1240 const static char* const * const mpls_label_imp_pipe_nodes[DPO_PROTO_NUM] =
1241 {
1246 };
1247 
1248 const static char* const mpls_label_imp_uniform_ip4_nodes[] =
1249 {
1250  "ip4-mpls-label-imposition-uniform",
1251  NULL,
1252 };
1253 const static char* const mpls_label_imp_uniform_ip6_nodes[] =
1254 {
1255  "ip6-mpls-label-imposition-uniform",
1256  NULL,
1257 };
1258 const static char* const mpls_label_imp_uniform_mpls_nodes[] =
1259 {
1260  "mpls-label-imposition-uniform",
1261  NULL,
1262 };
1263 const static char* const mpls_label_imp_uniform_ethernet_nodes[] =
1264 {
1265  "ethernet-mpls-label-imposition-uniform",
1266  NULL,
1267 };
1268 
1269 const static char* const * const mpls_label_imp_uniform_nodes[DPO_PROTO_NUM] =
1270 {
1275 };
1276 
1278 {
1279  "ip4-mpls-label-imposition-pipe-no-ip-ttl-decr",
1280  NULL,
1281 };
1283 {
1284  "ip6-mpls-label-imposition-pipe-no-ip-ttl-decr",
1285  NULL,
1286 };
1287 
1288 const static char* const * const mpls_label_imp_pipe_no_ip_tll_decr_nodes[DPO_PROTO_NUM] =
1289 {
1292 };
1293 
1295 {
1296  "ip4-mpls-label-imposition-uniform-no-ip-ttl-decr",
1297  NULL,
1298 };
1300 {
1301  "ip6-mpls-label-imposition-uniform-no-ip-ttl-decr",
1302  NULL,
1303 };
1304 
1306 {
1309 };
1310 
1311 void
1313 {
1315  dpo_register_new_type(&mld_vft,
1318  dpo_register_new_type(&mld_vft,
1321  dpo_register_new_type(&mld_vft,
1325  dpo_register_new_type(&mld_vft,
1327 }
1328 
1329 dpo_type_t
1331 {
1332  return (mpls_label_dpo_types[flags]);
1333 }
1334 #endif /* CLIB_MARCH_VARIANT */
static const char *const mpls_label_imp_pipe_ip6_nodes[]
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:124
dpo_lock_fn_t dv_lock
A reference counting lock function.
Definition: dpo.h:406
#define CLIB_UNUSED(x)
Definition: clib.h:86
A virtual function table regisitered for a DPO type.
Definition: dpo.h:401
format_function_t format_mpls_header
Definition: mpls.h:72
static const char *const mpls_label_imp_pipe_no_ip_tll_decr_ip6_nodes[]
mpls_unicast_header_t hdr
The MPLS header imposed.
#define PREDICT_TRUE(x)
Definition: clib.h:119
static const char *const mpls_label_imp_pipe_no_ip_tll_decr_ip4_nodes[]
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
static_always_inline ip_dscp_t ip6_traffic_class_network_order(const ip6_header_t *ip6)
Definition: ip6_packet.h:320
u32 index_t
A Data-Path Object is an object that represents actions that are applied to packets are they are swit...
Definition: dpo.h:41
#define vlib_validate_buffer_enqueue_x4(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3)
Finish enqueueing four buffers forward in the graph.
Definition: buffer_node.h:140
static u32 format_get_indent(u8 *s)
Definition: format.h:72
static const char *const mpls_label_imp_pipe_ethernet_nodes[]
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
u8 * format_mpls_label_dpo(u8 *s, va_list *args)
vlib_node_registration_t ip4_mpls_label_imposition_uniform_no_ip_ttl_decr_node
(constructor) VLIB_REGISTER_NODE (ip4_mpls_label_imposition_uniform_no_ip_ttl_decr_node) ...
#define VLIB_NODE_FN(node)
Definition: node.h:202
static uword mpls_label_imposition_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, const dpo_proto_t dproto, const mpls_label_dpo_flags_t flags)
unsigned char u8
Definition: types.h:56
#define pool_len(p)
Number of elements in pool vector.
Definition: pool.h:140
vlib_node_registration_t ip4_mpls_label_imposition_pipe_no_ip_ttl_decr_node
(constructor) VLIB_REGISTER_NODE (ip4_mpls_label_imposition_pipe_no_ip_ttl_decr_node) ...
const dpo_id_t * drop_dpo_get(dpo_proto_t proto)
Definition: drop_dpo.c:25
static index_t mpls_label_dpo_get_index(mpls_label_dpo_t *mld)
vlib_node_registration_t ip6_mpls_label_imposition_uniform_node
(constructor) VLIB_REGISTER_NODE (ip6_mpls_label_imposition_uniform_node)
enum dpo_type_t_ dpo_type_t
Common types of data-path objects New types can be dynamically added using dpo_register_new_type() ...
static const char *const mpls_label_imp_uniform_no_ip_tll_decr_ip6_nodes[]
vlib_node_registration_t ip6_mpls_label_imposition_pipe_node
(constructor) VLIB_REGISTER_NODE (ip6_mpls_label_imposition_pipe_node)
#define MPLS_LABEL_DPO_MAX_N_LABELS
Maximum number of labels in one DPO.
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:129
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
#define MPLS_LABEL_DEFAULT_EXP
The Default EXP added to MPLS label headers when no other value is available.
Definition: packet.h:55
static const char *const mpls_label_imp_uniform_mpls_nodes[]
void fib_show_memory_usage(const char *name, u32 in_use_elts, u32 allocd_elts, size_t size_elt)
Show the memory usage for a type.
Definition: fib_node.c:220
unsigned int u32
Definition: types.h:88
enum dpo_proto_t_ dpo_proto_t
Data path protocol.
u8 exp
TTL imposed - only valid for uniform LSPs.
static void vnet_mpls_uc_set_label(mpls_label_t *label_exp_s_ttl, u32 value)
Definition: packet.h:125
static const char *const mpls_label_imp_pipe_mpls_nodes[]
enum mpls_label_dpo_flags_t_ mpls_label_dpo_flags_t
dpo_proto_t mld_payload_proto
The protocol of the payload/packets that are being encapped.
dpo_type_t dpo_register_new_type(const dpo_vft_t *vft, const char *const *const *nodes)
Create and register a new DPO type.
Definition: dpo.c:342
#define FOR_EACH_MPLS_LABEL_DPO_ATTR(_item)
static void vnet_mpls_uc_set_exp(mpls_label_t *label_exp_s_ttl, u32 exp)
Definition: packet.h:132
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:170
static const char *const *const mpls_label_imp_uniform_nodes[DPO_PROTO_NUM]
void mpls_label_dpo_create(fib_mpls_label_t *label_stack, mpls_eos_bit_t eos, dpo_proto_t payload_proto, mpls_label_dpo_flags_t flags, const dpo_id_t *parent, dpo_id_t *dpo)
Create an MPLS label object.
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:302
#define PREDICT_FALSE(x)
Definition: clib.h:118
Configuration for each label value in the output-stack.
Definition: fib_types.h:445
#define always_inline
Definition: ipsec.h:28
vlib_node_registration_t ip4_mpls_label_imposition_pipe_node
(constructor) VLIB_REGISTER_NODE (ip4_mpls_label_imposition_pipe_node)
#define MPLS_LABEL_DPO_ATTR_NAMES
static const char *const *const mpls_label_imp_pipe_nodes[DPO_PROTO_NUM]
#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:224
#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:338
vlib_main_t * vm
Definition: in2out_ed.c:1599
const char * mpls_label_dpo_attr_names[]
Strings for the flags.
vlib_node_registration_t ip6_mpls_label_imposition_uniform_no_ip_ttl_decr_node
(constructor) VLIB_REGISTER_NODE (ip6_mpls_label_imposition_uniform_no_ip_ttl_decr_node) ...
static const char *const mpls_label_imp_uniform_no_ip_tll_decr_ip4_nodes[]
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P with alignment A.
Definition: pool.h:246
#define MPLS_LABEL_DPO_ATTR_MAX
vlib_node_registration_t ip6_mpls_label_imposition_pipe_no_ip_ttl_decr_node
(constructor) VLIB_REGISTER_NODE (ip6_mpls_label_imposition_pipe_no_ip_ttl_decr_node) ...
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
u32 flags
Definition: vhost_user.h:248
u16 n_vectors
Definition: node.h:399
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
static const char *const mpls_label_imp_uniform_ethernet_nodes[]
u16 mld_n_hdr_bytes
Cached amount of header bytes to paint.
vlib_node_registration_t mpls_mpls_label_imposition_pipe_node
(constructor) VLIB_REGISTER_NODE (mpls_mpls_label_imposition_pipe_node)
vlib_node_registration_t mpls_mpls_label_imposition_uniform_node
(constructor) VLIB_REGISTER_NODE (mpls_mpls_label_imposition_uniform_node)
#define clib_warning(format, args...)
Definition: error.h:59
static mpls_label_dpo_t * mpls_label_dpo_get(index_t index)
u8 data[]
Packet data.
Definition: buffer.h:181
static const char *const mpls_label_imp_uniform_ip6_nodes[]
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:299
mpls_label_t fml_value
The label value.
Definition: fib_types.h:450
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:483
void dpo_set(dpo_id_t *dpo, dpo_type_t type, dpo_proto_t proto, index_t index)
Set/create a DPO ID The DPO will be locked.
Definition: dpo.c:186
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1599
void mpls_label_dpo_module_init(void)
static const char *const mpls_label_imp_uniform_ip4_nodes[]
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:517
u8 mld_n_labels
Size of the label stack.
static void mpls_label_dpo_lock(dpo_id_t *dpo)
#define ASSERT(truth)
static mpls_unicast_header_t * mpls_label_paint_w_ttl(vlib_buffer_t *b0, mpls_label_dpo_t *mld0, u8 ttl0)
Paint on an MPLS label and fixup the TTL.
dpo_id_t mld_dpo
Next DPO in the graph.
u8 ttl
TTL imposed - only valid for uniform LSPs.
ip_dscp_t tos
Definition: ip4_packet.h:141
struct mpls_label_imposition_trace_t_ mpls_label_imposition_trace_t
A struct to hold tracing information for the MPLS label imposition node.
static mpls_unicast_header_t * mpls_label_paint_w_ttl_mpls_exp(vlib_buffer_t *b0, mpls_label_dpo_t *mld0, u8 ttl0, u8 exp0)
Paint on an MPLS label and fixup the TTL and EXP bits When the EXP bits are already bit shift to the ...
mpls_label_t label_exp_s_ttl
Definition: packet.h:33
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
static const char *const *const mpls_label_imp_uniform_no_ip_tll_decr_nodes[DPO_PROTO_NUM]
static void vnet_mpls_uc_set_s(mpls_label_t *label_exp_s_ttl, u32 eos)
Definition: packet.h:139
u8 * format_dpo_id(u8 *s, va_list *args)
Format a DPO_id_t oject.
Definition: dpo.c:148
mpls_unicast_header_t mld_hdr[MPLS_LABEL_DPO_MAX_N_LABELS]
The MPLS label header to impose.
vlib_node_registration_t ethernet_mpls_label_imposition_uniform_node
(constructor) VLIB_REGISTER_NODE (ethernet_mpls_label_imposition_uniform_node)
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
vlib_node_registration_t ethernet_mpls_label_imposition_pipe_node
(constructor) VLIB_REGISTER_NODE (ethernet_mpls_label_imposition_pipe_node)
Definition: defs.h:47
#define DPO_PROTO_NUM
Definition: dpo.h:70
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:186
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
vlib_node_registration_t ip4_mpls_label_imposition_uniform_node
(constructor) VLIB_REGISTER_NODE (ip4_mpls_label_imposition_uniform_node)
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
static mpls_unicast_header_t * mpls_label_paint_w_ttl_exp(vlib_buffer_t *b0, mpls_label_dpo_t *mld0, u8 ttl0, u8 exp0)
Paint on an MPLS label and fixup the TTL and EXP bits.
static u8 ip_dscp_to_mpls_exp(ip_dscp_t tos)
When in uniform mode convert an IPv[46] DSCP value to an MPLS EXP value.
Definition: packet.h:60
static void mpls_label_dpo_mem_show(void)
static void vnet_mpls_uc_set_ttl(mpls_label_t *label_exp_s_ttl, u32 ttl)
Definition: packet.h:146
mpls_label_dpo_flags_t mld_flags
Flags.
#define vnet_buffer(b)
Definition: buffer.h:417
vl_api_fib_mpls_label_t label_stack[16]
Definition: fib_types.api:128
static u8 * format_mpls_label_imposition_trace(u8 *s, va_list *args)
mpls_label_dpo_t * mpls_label_dpo_pool
void dpo_reset(dpo_id_t *dpo)
reset a DPO ID The DPO will be unlocked.
Definition: dpo.c:232
u16 mld_locks
Number of locks/users of the label.
vlib_main_t vlib_node_runtime_t vlib_frame_t * frame
Definition: in2out_ed.c:1600
u8 fml_exp
EXP bits; valid only at imposition.
Definition: fib_types.h:465
u16 dpoi_next_node
The next VLIB node to follow.
Definition: dpo.h:182
static const char *const *const mpls_label_imp_pipe_no_ip_tll_decr_nodes[DPO_PROTO_NUM]
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
dpo_type_t mpls_label_dpo_get_type(mpls_label_dpo_flags_t flags)
enum mpls_label_dpo_attr_t_ mpls_label_dpo_attr_t
Flags present on an MPLS label sourced path-extension.
static mpls_unicast_header_t * mpls_label_paint(vlib_buffer_t *b0, mpls_label_dpo_t *mld0)
static mpls_label_dpo_t * mpls_label_dpo_alloc(void)
u8 * format_mpls_label_dpo_flags(u8 *s, va_list *args)
Format the flags variable.
#define MPLS_LABEL_DEFAULT_TTL
The Default TTL added to MPLS label headers when no other value is available.
Definition: packet.h:50
static void mpls_label_interpose(const dpo_id_t *original, const dpo_id_t *parent, dpo_id_t *clone)
Interpose a label DPO.
A struct to hold tracing information for the MPLS label imposition node.
static void mpls_label_dpo_unlock(dpo_id_t *dpo)
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
static const char *const mpls_label_imp_pipe_ip4_nodes[]
A representation of an MPLS label for imposition in the data-path.
static dpo_type_t mpls_label_dpo_types[1<< MPLS_LABEL_DPO_ATTR_MAX]
registered DPO types for each of the label sub-types.
void dpo_stack(dpo_type_t child_type, dpo_proto_t child_proto, dpo_id_t *dpo, const dpo_id_t *parent)
Stack one DPO object on another, and thus establish a child-parent relationship.
Definition: dpo.c:516
enum mpls_eos_bit_t_ mpls_eos_bit_t
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128