FD.io VPP  v20.05.1-5-g09f167997
Vector Packet Processing
nat64.c
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1 /*
2  * Copyright (c) 2017 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  * @file
17  * @brief NAT64 implementation
18  */
19 
20 #include <nat/nat64.h>
21 #include <nat/nat64_db.h>
22 #include <nat/nat_inlines.h>
23 #include <vnet/fib/ip4_fib.h>
24 #include <vppinfra/crc32.h>
27 
28 
30 
31 /* *INDENT-OFF* */
32 
33 /* Hook up input features */
34 VNET_FEATURE_INIT (nat64_in2out, static) = {
35  .arc_name = "ip6-unicast",
36  .node_name = "nat64-in2out",
37  .runs_before = VNET_FEATURES ("ip6-lookup"),
38  .runs_after = VNET_FEATURES ("ip6-sv-reassembly-feature"),
39 };
40 VNET_FEATURE_INIT (nat64_out2in, static) = {
41  .arc_name = "ip4-unicast",
42  .node_name = "nat64-out2in",
43  .runs_before = VNET_FEATURES ("ip4-lookup"),
44  .runs_after = VNET_FEATURES ("ip4-sv-reassembly-feature"),
45 };
46 VNET_FEATURE_INIT (nat64_in2out_handoff, static) = {
47  .arc_name = "ip6-unicast",
48  .node_name = "nat64-in2out-handoff",
49  .runs_before = VNET_FEATURES ("ip6-lookup"),
50  .runs_after = VNET_FEATURES ("ip6-sv-reassembly-feature"),
51 };
52 VNET_FEATURE_INIT (nat64_out2in_handoff, static) = {
53  .arc_name = "ip4-unicast",
54  .node_name = "nat64-out2in-handoff",
55  .runs_before = VNET_FEATURES ("ip4-lookup"),
56  .runs_after = VNET_FEATURES ("ip4-sv-reassembly-feature"),
57 };
58 
59 
60 static u8 well_known_prefix[] = {
61  0x00, 0x64, 0xff, 0x9b,
62  0x00, 0x00, 0x00, 0x00,
63  0x00, 0x00, 0x00, 0x00,
64  0x00, 0x00, 0x00, 0x00
65 };
66 
67 /* *INDENT-ON* */
68 
69 static void
71  u32 sw_if_index,
73  u32 address_length,
74  u32 if_address_index, u32 is_delete)
75 {
76  nat64_main_t *nm = &nat64_main;
77  int i, j;
78 
79  for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
80  {
81  if (sw_if_index == nm->auto_add_sw_if_indices[i])
82  {
83  if (!is_delete)
84  {
85  /* Don't trip over lease renewal, static config */
86  for (j = 0; j < vec_len (nm->addr_pool); j++)
87  if (nm->addr_pool[j].addr.as_u32 == address->as_u32)
88  return;
89 
91  address, ~0, 1);
92  return;
93  }
94  else
95  {
97  address, ~0, 0);
98  return;
99  }
100  }
101  }
102 }
103 
104 u32
105 nat64_get_worker_in2out (ip6_address_t * addr)
106 {
107  nat64_main_t *nm = &nat64_main;
108  snat_main_t *sm = nm->sm;
109  u32 next_worker_index = nm->sm->first_worker_index;
110  u32 hash;
111 
112 #ifdef clib_crc32c_uses_intrinsics
113  hash = clib_crc32c ((u8 *) addr->as_u32, 16);
114 #else
115  u64 tmp = addr->as_u64[0] ^ addr->as_u64[1];
116  hash = clib_xxhash (tmp);
117 #endif
118 
119  if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
120  next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
121  else
122  next_worker_index += sm->workers[hash % _vec_len (sm->workers)];
123 
124  return next_worker_index;
125 }
126 
127 u32
129 {
130  nat64_main_t *nm = &nat64_main;
131  snat_main_t *sm = nm->sm;
132  udp_header_t *udp;
133  u16 port;
134  u32 proto;
135 
136  proto = ip_proto_to_nat_proto (ip->protocol);
137  udp = ip4_next_header (ip);
138  port = udp->dst_port;
139 
140  /* unknown protocol */
141  if (PREDICT_FALSE (proto == NAT_PROTOCOL_OTHER))
142  {
143  nat64_db_t *db;
144  ip46_address_t daddr;
145  nat64_db_bib_entry_t *bibe;
146 
147  clib_memset (&daddr, 0, sizeof (daddr));
148  daddr.ip4.as_u32 = ip->dst_address.as_u32;
149 
150  /* *INDENT-OFF* */
151  vec_foreach (db, nm->db)
152  {
153  bibe = nat64_db_bib_entry_find (db, &daddr, 0, ip->protocol, 0, 0);
154  if (bibe)
155  return (u32) (db - nm->db);
156  }
157  /* *INDENT-ON* */
158  return vlib_get_thread_index ();
159  }
160 
161  /* ICMP */
162  if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP))
163  {
164  icmp46_header_t *icmp = (icmp46_header_t *) udp;
165  icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
167  (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
168  port = vnet_buffer (b)->ip.reass.l4_src_port;
169  else
170  {
171  /* if error message, then it's not fragmented and we can access it */
172  ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
173  proto = ip_proto_to_nat_proto (inner_ip->protocol);
174  void *l4_header = ip4_next_header (inner_ip);
175  switch (proto)
176  {
177  case NAT_PROTOCOL_ICMP:
178  icmp = (icmp46_header_t *) l4_header;
179  echo = (icmp_echo_header_t *) (icmp + 1);
180  port = echo->identifier;
181  break;
182  case NAT_PROTOCOL_UDP:
183  case NAT_PROTOCOL_TCP:
184  port = ((tcp_udp_header_t *) l4_header)->src_port;
185  break;
186  default:
187  return vlib_get_thread_index ();
188  }
189  }
190  }
191 
192  /* worker by outside port (TCP/UDP) */
193  port = clib_net_to_host_u16 (port);
194  if (port > 1024)
195  return nm->sm->first_worker_index + ((port - 1024) / sm->port_per_thread);
196 
197  return vlib_get_thread_index ();
198 }
199 
200 clib_error_t *
202 {
203  nat64_main_t *nm = &nat64_main;
206  ip4_main_t *im = &ip4_main;
207  nm->sm = &snat_main;
208  vlib_node_t *node;
209 
210  vec_validate (nm->db, tm->n_vlib_mains - 1);
211 
212  nm->fq_in2out_index = ~0;
213  nm->fq_out2in_index = ~0;
214 
215  node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
216  nm->error_node_index = node->index;
217 
218  node = vlib_get_node_by_name (vm, (u8 *) "nat64-in2out");
219  nm->in2out_node_index = node->index;
220 
221  node = vlib_get_node_by_name (vm, (u8 *) "nat64-in2out-slowpath");
222  nm->in2out_slowpath_node_index = node->index;
223 
224  node = vlib_get_node_by_name (vm, (u8 *) "nat64-out2in");
225  nm->out2in_node_index = node->index;
226 
227  /* set session timeouts to default values */
232 
233  nm->total_enabled_count = 0;
234 
235  /* Set up the interface address add/del callback */
237  cb4.function_opaque = 0;
239  nm->ip4_main = im;
240 
241  /* Init counters */
242  nm->total_bibs.name = "total-bibs";
243  nm->total_bibs.stat_segment_name = "/nat64/total-bibs";
246  nm->total_sessions.name = "total-sessions";
247  nm->total_sessions.stat_segment_name = "/nat64/total-sessions";
250 
251  return 0;
252 }
253 
254 static void nat64_free_out_addr_and_port (struct nat64_db_s *db,
255  ip4_address_t * addr, u16 port,
256  u8 protocol);
257 
258 void
259 nat64_set_hash (u32 bib_buckets, uword bib_memory_size, u32 st_buckets,
260  uword st_memory_size)
261 {
262  nat64_main_t *nm = &nat64_main;
263  nat64_db_t *db;
264 
265  nm->bib_buckets = bib_buckets;
266  nm->bib_memory_size = bib_memory_size;
267  nm->st_buckets = st_buckets;
268  nm->st_memory_size = st_memory_size;
269 
270  /* *INDENT-OFF* */
271  vec_foreach (db, nm->db)
272  {
273  if (nat64_db_init (db, bib_buckets, bib_memory_size, st_buckets,
274  st_memory_size, nat64_free_out_addr_and_port))
275  nat_elog_err ("NAT64 DB init failed");
276  }
277  /* *INDENT-ON* */
278 }
279 
280 int
282  ip4_address_t * addr, u32 vrf_id, u8 is_add)
283 {
284  nat64_main_t *nm = &nat64_main;
285  snat_address_t *a = 0;
286  snat_interface_t *interface;
287  int i;
288  nat64_db_t *db;
290 
291  /* Check if address already exists */
292  for (i = 0; i < vec_len (nm->addr_pool); i++)
293  {
294  if (nm->addr_pool[i].addr.as_u32 == addr->as_u32)
295  {
296  a = nm->addr_pool + i;
297  break;
298  }
299  }
300 
301  if (is_add)
302  {
303  if (a)
304  return VNET_API_ERROR_VALUE_EXIST;
305 
306  vec_add2 (nm->addr_pool, a, 1);
307  a->addr = *addr;
308  a->fib_index = ~0;
309  if (vrf_id != ~0)
310  a->fib_index =
313 #define _(N, id, n, s) \
314  clib_memset (a->busy_##n##_port_refcounts, 0, sizeof(a->busy_##n##_port_refcounts)); \
315  a->busy_##n##_ports = 0; \
316  vec_validate_init_empty (a->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
318 #undef _
319  }
320  else
321  {
322  if (!a)
323  return VNET_API_ERROR_NO_SUCH_ENTRY;
324 
325  if (a->fib_index != ~0)
327  /* Delete sessions using address */
328  /* *INDENT-OFF* */
329  vec_foreach (db, nm->db)
330  {
331  nat64_db_free_out_addr (thread_index, db, &a->addr);
332  vlib_set_simple_counter (&nm->total_bibs, db - nm->db, 0,
333  db->bib.bib_entries_num);
334  vlib_set_simple_counter (&nm->total_sessions, db - nm->db, 0,
335  db->st.st_entries_num);
336  }
337  /* *INDENT-ON* */
338  vec_del1 (nm->addr_pool, i);
339  }
340 
341  /* Add/del external address to FIB */
342  /* *INDENT-OFF* */
343  pool_foreach (interface, nm->interfaces,
344  ({
345  if (nat_interface_is_inside(interface))
346  continue;
347 
348  snat_add_del_addr_to_fib (addr, 32, interface->sw_if_index, is_add);
349  break;
350  }));
351  /* *INDENT-ON* */
352 
353  return 0;
354 }
355 
356 void
358 {
359  nat64_main_t *nm = &nat64_main;
360  snat_address_t *a = 0;
361 
362  /* *INDENT-OFF* */
363  vec_foreach (a, nm->addr_pool)
364  {
365  if (fn (a, ctx))
366  break;
367  };
368  /* *INDENT-ON* */
369 }
370 
371 int
372 nat64_add_interface_address (u32 sw_if_index, int is_add)
373 {
374  nat64_main_t *nm = &nat64_main;
376  ip4_address_t *first_int_addr;
377  int i;
378 
379  first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0);
380 
381  for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
382  {
383  if (nm->auto_add_sw_if_indices[i] == sw_if_index)
384  {
385  if (is_add)
386  return VNET_API_ERROR_VALUE_EXIST;
387  else
388  {
389  /* if have address remove it */
390  if (first_int_addr)
392  first_int_addr, ~0, 0);
394  return 0;
395  }
396  }
397  }
398 
399  if (!is_add)
400  return VNET_API_ERROR_NO_SUCH_ENTRY;
401 
402  /* add to the auto-address list */
403  vec_add1 (nm->auto_add_sw_if_indices, sw_if_index);
404 
405  /* If the address is already bound - or static - add it now */
406  if (first_int_addr)
408  first_int_addr, ~0, 1);
409 
410  return 0;
411 }
412 
413 int
414 nat64_add_del_interface (u32 sw_if_index, u8 is_inside, u8 is_add)
415 {
417  nat64_main_t *nm = &nat64_main;
418  snat_interface_t *interface = 0, *i;
419  snat_address_t *ap;
420  const char *feature_name, *arc_name;
421 
422  /* Check if interface already exists */
423  /* *INDENT-OFF* */
424  pool_foreach (i, nm->interfaces,
425  ({
426  if (i->sw_if_index == sw_if_index)
427  {
428  interface = i;
429  break;
430  }
431  }));
432  /* *INDENT-ON* */
433 
434  if (is_add)
435  {
436  if (interface)
437  goto set_flags;
438 
439  pool_get (nm->interfaces, interface);
440  interface->sw_if_index = sw_if_index;
441  interface->flags = 0;
442  set_flags:
443  if (is_inside)
444  interface->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
445  else
446  interface->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
447 
448  nm->total_enabled_count++;
450  nm->nat64_expire_walk_node_index,
452 
453  }
454  else
455  {
456  if (!interface)
457  return VNET_API_ERROR_NO_SUCH_ENTRY;
458 
459  if ((nat_interface_is_inside (interface)
460  && nat_interface_is_outside (interface)))
461  interface->flags &=
462  is_inside ? ~NAT_INTERFACE_FLAG_IS_INSIDE :
464  else
465  pool_put (nm->interfaces, interface);
466 
467  nm->total_enabled_count--;
468  }
469 
470  if (!is_inside)
471  {
472  /* *INDENT-OFF* */
473  vec_foreach (ap, nm->addr_pool)
474  snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, is_add);
475  /* *INDENT-ON* */
476  }
477 
478  if (nm->sm->num_workers > 1)
479  {
480  feature_name =
481  is_inside ? "nat64-in2out-handoff" : "nat64-out2in-handoff";
482  if (nm->fq_in2out_index == ~0)
483  nm->fq_in2out_index =
485  if (nm->fq_out2in_index == ~0)
486  nm->fq_out2in_index =
488  }
489  else
490  feature_name = is_inside ? "nat64-in2out" : "nat64-out2in";
491 
492  arc_name = is_inside ? "ip6-unicast" : "ip4-unicast";
493 
494  if (is_inside)
495  {
496  int rv = ip6_sv_reass_enable_disable_with_refcnt (sw_if_index, is_add);
497  if (rv)
498  return rv;
499  }
500  else
501  {
502  int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, is_add);
503  if (rv)
504  return rv;
505  }
506 
507  return vnet_feature_enable_disable (arc_name, feature_name, sw_if_index,
508  is_add, 0, 0);
509 }
510 
511 void
513 {
514  nat64_main_t *nm = &nat64_main;
515  snat_interface_t *i = 0;
516 
517  /* *INDENT-OFF* */
518  pool_foreach (i, nm->interfaces,
519  ({
520  if (fn (i, ctx))
521  break;
522  }));
523  /* *INDENT-ON* */
524 }
525 
526 int
528  ip4_address_t * addr, u16 * port,
529  u32 thread_index)
530 {
531  nat64_main_t *nm = &nat64_main;
532  snat_main_t *sm = nm->sm;
534  u32 worker_index = 0;
535  int rv;
536 
537  k.protocol = proto;
538 
539  if (sm->num_workers > 1)
540  worker_index = thread_index - sm->first_worker_index;
541 
542  rv =
543  sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k,
544  sm->port_per_thread, worker_index);
545 
546  if (!rv)
547  {
548  *port = k.port;
549  addr->as_u32 = k.addr.as_u32;
550  }
551 
552  return rv;
553 }
554 
555 static void
557  u16 port, u8 protocol)
558 {
559  nat64_main_t *nm = &nat64_main;
560  int i;
561  snat_address_t *a;
562  u32 thread_index = db - nm->db;
564  u16 port_host_byte_order = clib_net_to_host_u16 (port);
565 
566  for (i = 0; i < vec_len (nm->addr_pool); i++)
567  {
568  a = nm->addr_pool + i;
569  if (addr->as_u32 != a->addr.as_u32)
570  continue;
571  switch (proto)
572  {
573 #define _(N, j, n, s) \
574  case NAT_PROTOCOL_##N: \
575  ASSERT (a->busy_##n##_port_refcounts[port_host_byte_order] >= 1); \
576  --a->busy_##n##_port_refcounts[port_host_byte_order]; \
577  a->busy_##n##_ports--; \
578  a->busy_##n##_ports_per_thread[thread_index]--; \
579  break;
581 #undef _
582  default:
583  nat_elog_notice ("unknown protocol");
584  return;
585  }
586  break;
587  }
588 }
589 
590 /**
591  * @brief Add/delete static BIB entry in worker thread.
592  */
593 static uword
595  vlib_frame_t * f)
596 {
597  nat64_main_t *nm = &nat64_main;
598  u32 thread_index = vm->thread_index;
599  nat64_db_t *db = &nm->db[thread_index];
600  nat64_static_bib_to_update_t *static_bib;
601  nat64_db_bib_entry_t *bibe;
602  ip46_address_t addr;
603 
604  /* *INDENT-OFF* */
605  pool_foreach (static_bib, nm->static_bibs,
606  ({
607  if ((static_bib->thread_index != thread_index) || (static_bib->done))
608  continue;
609 
610  if (static_bib->is_add)
611  {
612  (void) nat64_db_bib_entry_create (thread_index, db,
613  &static_bib->in_addr,
614  &static_bib->out_addr,
615  static_bib->in_port,
616  static_bib->out_port,
617  static_bib->fib_index,
618  static_bib->proto, 1);
619  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
620  db->bib.bib_entries_num);
621  }
622  else
623  {
624  addr.as_u64[0] = static_bib->in_addr.as_u64[0];
625  addr.as_u64[1] = static_bib->in_addr.as_u64[1];
626  bibe = nat64_db_bib_entry_find (db, &addr, static_bib->in_port,
627  static_bib->proto,
628  static_bib->fib_index, 1);
629  if (bibe)
630  {
631  nat64_db_bib_entry_free (thread_index, db, bibe);
632  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
633  db->bib.bib_entries_num);
634  vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
635  db->st.st_entries_num);
636  }
637  }
638 
639  static_bib->done = 1;
640  }));
641  /* *INDENT-ON* */
642 
643  return 0;
644 }
645 
647 
648 /* *INDENT-OFF* */
649 VLIB_REGISTER_NODE (nat64_static_bib_worker_node, static) = {
650  .function = nat64_static_bib_worker_fn,
651  .type = VLIB_NODE_TYPE_INPUT,
652  .state = VLIB_NODE_STATE_INTERRUPT,
653  .name = "nat64-static-bib-worker",
654 };
655 /* *INDENT-ON* */
656 
657 int
658 nat64_add_del_static_bib_entry (ip6_address_t * in_addr,
659  ip4_address_t * out_addr, u16 in_port,
660  u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
661 {
662  nat64_main_t *nm = &nat64_main;
663  nat64_db_bib_entry_t *bibe;
667  ip46_address_t addr;
668  int i;
669  snat_address_t *a;
670  u32 thread_index = 0;
671  nat64_db_t *db;
672  nat64_static_bib_to_update_t *static_bib;
673  vlib_main_t *worker_vm;
674  u32 *to_be_free = 0, *index;
675 
676  if (nm->sm->num_workers > 1)
677  {
678  thread_index = nat64_get_worker_in2out (in_addr);
679  db = &nm->db[thread_index];
680  }
681  else
682  db = &nm->db[nm->sm->num_workers];
683 
684  addr.as_u64[0] = in_addr->as_u64[0];
685  addr.as_u64[1] = in_addr->as_u64[1];
686  bibe =
687  nat64_db_bib_entry_find (db, &addr, clib_host_to_net_u16 (in_port),
688  proto, fib_index, 1);
689 
690  if (is_add)
691  {
692  if (bibe)
693  return VNET_API_ERROR_VALUE_EXIST;
694 
695  /* outside port must be assigned to same thread as internall address */
696  if ((out_port > 1024) && (nm->sm->num_workers > 1))
697  {
698  if (thread_index != ((out_port - 1024) / nm->sm->port_per_thread))
699  return VNET_API_ERROR_INVALID_VALUE_2;
700  }
701 
702  for (i = 0; i < vec_len (nm->addr_pool); i++)
703  {
704  a = nm->addr_pool + i;
705  if (out_addr->as_u32 != a->addr.as_u32)
706  continue;
707  switch (p)
708  {
709 #define _(N, j, n, s) \
710  case NAT_PROTOCOL_##N: \
711  if (a->busy_##n##_port_refcounts[out_port]) \
712  return VNET_API_ERROR_INVALID_VALUE; \
713  ++a->busy_##n##_port_refcounts[out_port]; \
714  if (out_port > 1024) \
715  { \
716  a->busy_##n##_ports++; \
717  a->busy_##n##_ports_per_thread[thread_index]++; \
718  } \
719  break;
721 #undef _
722  default:
723  clib_memset (&addr, 0, sizeof (addr));
724  addr.ip4.as_u32 = out_addr->as_u32;
725  if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
726  return VNET_API_ERROR_INVALID_VALUE;
727  }
728  break;
729  }
730  if (!nm->sm->num_workers)
731  {
732  bibe =
733  nat64_db_bib_entry_create (thread_index, db, in_addr, out_addr,
734  clib_host_to_net_u16 (in_port),
735  clib_host_to_net_u16 (out_port),
736  fib_index, proto, 1);
737  if (!bibe)
738  return VNET_API_ERROR_UNSPECIFIED;
739 
740  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
741  db->bib.bib_entries_num);
742  }
743  }
744  else
745  {
746  if (!bibe)
747  return VNET_API_ERROR_NO_SUCH_ENTRY;
748 
749  if (!nm->sm->num_workers)
750  {
751  nat64_db_bib_entry_free (thread_index, db, bibe);
752  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
753  db->bib.bib_entries_num);
754  }
755  }
756 
757  if (nm->sm->num_workers)
758  {
759  /* *INDENT-OFF* */
760  pool_foreach (static_bib, nm->static_bibs,
761  ({
762  if (static_bib->done)
763  vec_add1 (to_be_free, static_bib - nm->static_bibs);
764  }));
765  vec_foreach (index, to_be_free)
766  pool_put_index (nm->static_bibs, index[0]);
767  /* *INDENT-ON* */
768  vec_free (to_be_free);
769  pool_get (nm->static_bibs, static_bib);
770  static_bib->in_addr.as_u64[0] = in_addr->as_u64[0];
771  static_bib->in_addr.as_u64[1] = in_addr->as_u64[1];
772  static_bib->in_port = clib_host_to_net_u16 (in_port);
773  static_bib->out_addr.as_u32 = out_addr->as_u32;
774  static_bib->out_port = clib_host_to_net_u16 (out_port);
775  static_bib->fib_index = fib_index;
776  static_bib->proto = proto;
777  static_bib->is_add = is_add;
778  static_bib->thread_index = thread_index;
779  static_bib->done = 0;
780  worker_vm = vlib_mains[thread_index];
781  if (worker_vm)
783  nat64_static_bib_worker_node.index);
784  else
785  return VNET_API_ERROR_UNSPECIFIED;
786  }
787 
788  return 0;
789 }
790 
791 int
793 {
794  nat64_main_t *nm = &nat64_main;
795 
796  if (timeout == 0)
798  else
799  nm->udp_timeout = timeout;
800 
801  return 0;
802 }
803 
804 u32
806 {
807  nat64_main_t *nm = &nat64_main;
808 
809  return nm->udp_timeout;
810 }
811 
812 int
814 {
815  nat64_main_t *nm = &nat64_main;
816 
817  if (timeout == 0)
819  else
820  nm->icmp_timeout = timeout;
821 
822  return 0;
823 }
824 
825 u32
827 {
828  nat64_main_t *nm = &nat64_main;
829 
830  return nm->icmp_timeout;
831 }
832 
833 int
835 {
836  nat64_main_t *nm = &nat64_main;
837 
838  if (trans == 0)
840  else
841  nm->tcp_trans_timeout = trans;
842 
843  if (est == 0)
845  else
846  nm->tcp_est_timeout = est;
847 
848  return 0;
849 }
850 
851 u32
853 {
854  nat64_main_t *nm = &nat64_main;
855 
856  return nm->tcp_trans_timeout;
857 }
858 
859 u32
861 {
862  nat64_main_t *nm = &nat64_main;
863 
864  return nm->tcp_est_timeout;
865 }
866 
867 void
868 nat64_session_reset_timeout (nat64_db_st_entry_t * ste, vlib_main_t * vm)
869 {
870  nat64_main_t *nm = &nat64_main;
871  u32 now = (u32) vlib_time_now (vm);
872 
873  switch (ip_proto_to_nat_proto (ste->proto))
874  {
875  case NAT_PROTOCOL_ICMP:
876  ste->expire = now + nm->icmp_timeout;
877  return;
878  case NAT_PROTOCOL_TCP:
879  {
880  switch (ste->tcp_state)
881  {
882  case NAT64_TCP_STATE_V4_INIT:
883  case NAT64_TCP_STATE_V6_INIT:
884  case NAT64_TCP_STATE_V4_FIN_RCV:
885  case NAT64_TCP_STATE_V6_FIN_RCV:
886  case NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV:
887  case NAT64_TCP_STATE_TRANS:
888  ste->expire = now + nm->tcp_trans_timeout;
889  return;
890  case NAT64_TCP_STATE_ESTABLISHED:
891  ste->expire = now + nm->tcp_est_timeout;
892  return;
893  default:
894  return;
895  }
896  }
897  case NAT_PROTOCOL_UDP:
898  ste->expire = now + nm->udp_timeout;
899  return;
900  default:
901  ste->expire = now + nm->udp_timeout;
902  return;
903  }
904 }
905 
906 void
907 nat64_tcp_session_set_state (nat64_db_st_entry_t * ste, tcp_header_t * tcp,
908  u8 is_ip6)
909 {
910  switch (ste->tcp_state)
911  {
912  case NAT64_TCP_STATE_CLOSED:
913  {
914  if (tcp->flags & TCP_FLAG_SYN)
915  {
916  if (is_ip6)
917  ste->tcp_state = NAT64_TCP_STATE_V6_INIT;
918  else
919  ste->tcp_state = NAT64_TCP_STATE_V4_INIT;
920  }
921  return;
922  }
923  case NAT64_TCP_STATE_V4_INIT:
924  {
925  if (is_ip6 && (tcp->flags & TCP_FLAG_SYN))
926  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
927  return;
928  }
929  case NAT64_TCP_STATE_V6_INIT:
930  {
931  if (!is_ip6 && (tcp->flags & TCP_FLAG_SYN))
932  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
933  return;
934  }
935  case NAT64_TCP_STATE_ESTABLISHED:
936  {
937  if (tcp->flags & TCP_FLAG_FIN)
938  {
939  if (is_ip6)
940  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_RCV;
941  else
942  ste->tcp_state = NAT64_TCP_STATE_V4_FIN_RCV;
943  }
944  else if (tcp->flags & TCP_FLAG_RST)
945  {
946  ste->tcp_state = NAT64_TCP_STATE_TRANS;
947  }
948  return;
949  }
950  case NAT64_TCP_STATE_V4_FIN_RCV:
951  {
952  if (is_ip6 && (tcp->flags & TCP_FLAG_FIN))
953  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
954  return;
955  }
956  case NAT64_TCP_STATE_V6_FIN_RCV:
957  {
958  if (!is_ip6 && (tcp->flags & TCP_FLAG_FIN))
959  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
960  return;
961  }
962  case NAT64_TCP_STATE_TRANS:
963  {
964  if (!(tcp->flags & TCP_FLAG_RST))
965  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
966  return;
967  }
968  default:
969  return;
970  }
971 }
972 
973 int
974 nat64_add_del_prefix (ip6_address_t * prefix, u8 plen, u32 vrf_id, u8 is_add)
975 {
976  nat64_main_t *nm = &nat64_main;
977  nat64_prefix_t *p = 0;
978  int i;
979 
980  /* Verify prefix length */
981  if (plen != 32 && plen != 40 && plen != 48 && plen != 56 && plen != 64
982  && plen != 96)
983  return VNET_API_ERROR_INVALID_VALUE;
984 
985  /* Check if tenant already have prefix */
986  for (i = 0; i < vec_len (nm->pref64); i++)
987  {
988  if (nm->pref64[i].vrf_id == vrf_id)
989  {
990  p = nm->pref64 + i;
991  break;
992  }
993  }
994 
995  if (is_add)
996  {
997  if (!p)
998  {
999  vec_add2 (nm->pref64, p, 1);
1000  p->fib_index =
1002  nat_fib_src_hi);
1003  p->vrf_id = vrf_id;
1004  }
1005 
1006  p->prefix.as_u64[0] = prefix->as_u64[0];
1007  p->prefix.as_u64[1] = prefix->as_u64[1];
1008  p->plen = plen;
1009  }
1010  else
1011  {
1012  if (!p)
1013  return VNET_API_ERROR_NO_SUCH_ENTRY;
1014 
1015  vec_del1 (nm->pref64, i);
1016  }
1017 
1018  return 0;
1019 }
1020 
1021 void
1023 {
1024  nat64_main_t *nm = &nat64_main;
1025  nat64_prefix_t *p = 0;
1026 
1027  /* *INDENT-OFF* */
1028  vec_foreach (p, nm->pref64)
1029  {
1030  if (fn (p, ctx))
1031  break;
1032  };
1033  /* *INDENT-ON* */
1034 }
1035 
1036 void
1037 nat64_compose_ip6 (ip6_address_t * ip6, ip4_address_t * ip4, u32 fib_index)
1038 {
1039  nat64_main_t *nm = &nat64_main;
1040  nat64_prefix_t *p, *gp = 0, *prefix = 0;
1041 
1042  /* *INDENT-OFF* */
1043  vec_foreach (p, nm->pref64)
1044  {
1045  if (p->fib_index == fib_index)
1046  {
1047  prefix = p;
1048  break;
1049  }
1050 
1051  if (p->fib_index == 0)
1052  gp = p;
1053  };
1054  /* *INDENT-ON* */
1055 
1056  if (!prefix)
1057  prefix = gp;
1058 
1059  if (prefix)
1060  {
1061  clib_memcpy_fast (ip6, &p->prefix, sizeof (ip6_address_t));
1062  switch (p->plen)
1063  {
1064  case 32:
1065  ip6->as_u32[1] = ip4->as_u32;
1066  break;
1067  case 40:
1068  ip6->as_u8[5] = ip4->as_u8[0];
1069  ip6->as_u8[6] = ip4->as_u8[1];
1070  ip6->as_u8[7] = ip4->as_u8[2];
1071  ip6->as_u8[9] = ip4->as_u8[3];
1072  break;
1073  case 48:
1074  ip6->as_u8[6] = ip4->as_u8[0];
1075  ip6->as_u8[7] = ip4->as_u8[1];
1076  ip6->as_u8[9] = ip4->as_u8[2];
1077  ip6->as_u8[10] = ip4->as_u8[3];
1078  break;
1079  case 56:
1080  ip6->as_u8[7] = ip4->as_u8[0];
1081  ip6->as_u8[9] = ip4->as_u8[1];
1082  ip6->as_u8[10] = ip4->as_u8[2];
1083  ip6->as_u8[11] = ip4->as_u8[3];
1084  break;
1085  case 64:
1086  ip6->as_u8[9] = ip4->as_u8[0];
1087  ip6->as_u8[10] = ip4->as_u8[1];
1088  ip6->as_u8[11] = ip4->as_u8[2];
1089  ip6->as_u8[12] = ip4->as_u8[3];
1090  break;
1091  case 96:
1092  ip6->as_u32[3] = ip4->as_u32;
1093  break;
1094  default:
1095  nat_elog_notice ("invalid prefix length");
1096  break;
1097  }
1098  }
1099  else
1100  {
1101  clib_memcpy_fast (ip6, well_known_prefix, sizeof (ip6_address_t));
1102  ip6->as_u32[3] = ip4->as_u32;
1103  }
1104 }
1105 
1106 void
1107 nat64_extract_ip4 (ip6_address_t * ip6, ip4_address_t * ip4, u32 fib_index)
1108 {
1109  nat64_main_t *nm = &nat64_main;
1110  nat64_prefix_t *p, *gp = 0;
1111  u8 plen = 0;
1112 
1113  /* *INDENT-OFF* */
1114  vec_foreach (p, nm->pref64)
1115  {
1116  if (p->fib_index == fib_index)
1117  {
1118  plen = p->plen;
1119  break;
1120  }
1121 
1122  if (p->vrf_id == 0)
1123  gp = p;
1124  };
1125  /* *INDENT-ON* */
1126 
1127  if (!plen)
1128  {
1129  if (gp)
1130  plen = gp->plen;
1131  else
1132  plen = 96;
1133  }
1134 
1135  switch (plen)
1136  {
1137  case 32:
1138  ip4->as_u32 = ip6->as_u32[1];
1139  break;
1140  case 40:
1141  ip4->as_u8[0] = ip6->as_u8[5];
1142  ip4->as_u8[1] = ip6->as_u8[6];
1143  ip4->as_u8[2] = ip6->as_u8[7];
1144  ip4->as_u8[3] = ip6->as_u8[9];
1145  break;
1146  case 48:
1147  ip4->as_u8[0] = ip6->as_u8[6];
1148  ip4->as_u8[1] = ip6->as_u8[7];
1149  ip4->as_u8[2] = ip6->as_u8[9];
1150  ip4->as_u8[3] = ip6->as_u8[10];
1151  break;
1152  case 56:
1153  ip4->as_u8[0] = ip6->as_u8[7];
1154  ip4->as_u8[1] = ip6->as_u8[9];
1155  ip4->as_u8[2] = ip6->as_u8[10];
1156  ip4->as_u8[3] = ip6->as_u8[11];
1157  break;
1158  case 64:
1159  ip4->as_u8[0] = ip6->as_u8[9];
1160  ip4->as_u8[1] = ip6->as_u8[10];
1161  ip4->as_u8[2] = ip6->as_u8[11];
1162  ip4->as_u8[3] = ip6->as_u8[12];
1163  break;
1164  case 96:
1165  ip4->as_u32 = ip6->as_u32[3];
1166  break;
1167  default:
1168  nat_elog_notice ("invalid prefix length");
1169  break;
1170  }
1171 }
1172 
1173 /**
1174  * @brief Per worker process checking expire time for NAT64 sessions.
1175  */
1176 static uword
1178  vlib_frame_t * f)
1179 {
1180  nat64_main_t *nm = &nat64_main;
1181  u32 thread_index = vm->thread_index;
1182  nat64_db_t *db = &nm->db[thread_index];
1183  u32 now = (u32) vlib_time_now (vm);
1184 
1185  nad64_db_st_free_expired (thread_index, db, now);
1186  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
1187  db->bib.bib_entries_num);
1188  vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
1189  db->st.st_entries_num);
1190 
1191  return 0;
1192 }
1193 
1195 
1196 /* *INDENT-OFF* */
1197 VLIB_REGISTER_NODE (nat64_expire_worker_walk_node, static) = {
1198  .function = nat64_expire_worker_walk_fn,
1199  .type = VLIB_NODE_TYPE_INPUT,
1200  .state = VLIB_NODE_STATE_INTERRUPT,
1201  .name = "nat64-expire-worker-walk",
1202 };
1203 /* *INDENT-ON* */
1204 
1206 
1207 /**
1208  * @brief Centralized process to drive per worker expire walk.
1209  */
1210 static uword
1212  vlib_frame_t * f)
1213 {
1214  nat64_main_t *nm = &nat64_main;
1215  vlib_main_t **worker_vms = 0, *worker_vm;
1216  int i;
1217  uword event_type, *event_data = 0;
1218 
1219  nm->nat64_expire_walk_node_index = nat64_expire_walk_node.index;
1220 
1221  if (vec_len (vlib_mains) == 0)
1222  vec_add1 (worker_vms, vm);
1223  else
1224  {
1225  for (i = 0; i < vec_len (vlib_mains); i++)
1226  {
1227  worker_vm = vlib_mains[i];
1228  if (worker_vm)
1229  vec_add1 (worker_vms, worker_vm);
1230  }
1231  }
1232 
1233  while (1)
1234  {
1235  if (nm->total_enabled_count)
1236  {
1238  event_type = vlib_process_get_events (vm, &event_data);
1239  }
1240  else
1241  {
1243  event_type = vlib_process_get_events (vm, &event_data);
1244  }
1245 
1246  switch (event_type)
1247  {
1248  case ~0:
1249  break;
1251  break;
1252  default:
1253  nat_elog_notice_X1 ("unknown event %d", "i4", event_type);
1254  break;
1255  }
1256 
1257  for (i = 0; i < vec_len (worker_vms); i++)
1258  {
1259  worker_vm = worker_vms[i];
1261  nat64_expire_worker_walk_node.index);
1262  }
1263  }
1264 
1265  return 0;
1266 }
1267 
1268 /* *INDENT-OFF* */
1269 VLIB_REGISTER_NODE (nat64_expire_walk_node, static) = {
1270  .function = nat64_expire_walk_fn,
1271  .type = VLIB_NODE_TYPE_PROCESS,
1272  .name = "nat64-expire-walk",
1273 };
1274 /* *INDENT-ON* */
1275 
1276 /*
1277  * fd.io coding-style-patch-verification: ON
1278  *
1279  * Local Variables:
1280  * eval: (c-set-style "gnu")
1281  * End:
1282  */
u32 nat64_get_icmp_timeout(void)
Get ICMP session timeout.
Definition: nat64.c:826
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:507
void nat64_db_free_out_addr(u32 thread_index, nat64_db_t *db, ip4_address_t *out_addr)
Free sessions using specific outside address.
Definition: nat64_db.c:685
nat64_db_t * db
BIB and session DB per thread.
Definition: nat64.h:83
int nat64_alloc_out_addr_and_port(u32 fib_index, nat_protocol_t proto, ip4_address_t *addr, u16 *port, u32 thread_index)
Alloce IPv4 address and port pair from NAT64 pool.
Definition: nat64.c:527
u32 icmp_timeout
Definition: nat64.h:100
u32 out2in_node_index
Definition: nat64.h:119
int nat64_set_udp_timeout(u32 timeout)
Set UDP session timeout.
Definition: nat64.c:792
ip4_add_del_interface_address_callback_t * add_del_interface_address_callbacks
Functions to call when interface address changes.
Definition: ip4.h:140
static f64 vlib_process_wait_for_event_or_clock(vlib_main_t *vm, f64 dt)
Suspend a cooperative multi-tasking thread Waits for an event, or for the indicated number of seconds...
Definition: node_funcs.h:673
a
Definition: bitmap.h:538
int ip4_sv_reass_enable_disable_with_refcnt(u32 sw_if_index, int is_enable)
static uword * vlib_process_wait_for_event(vlib_main_t *vm)
Definition: node_funcs.h:593
ip6_address_t prefix
Definition: nat64.h:49
snat_address_t * addr_pool
Address pool vector.
Definition: nat64.h:74
#define TCP_FLAG_SYN
Definition: fa_node.h:13
#define nat_elog_notice(nat_elog_str)
Definition: nat.h:986
void nat64_extract_ip4(ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
Extract IPv4 address from the IPv4-embedded IPv6 addresses.
Definition: nat64.c:1107
#define SNAT_TCP_ESTABLISHED_TIMEOUT
Definition: nat.h:42
#define PREDICT_TRUE(x)
Definition: clib.h:119
unsigned long u64
Definition: types.h:89
u32 st_buckets
Definition: nat64.h:95
static void vlib_node_set_interrupt_pending(vlib_main_t *vm, u32 node_index)
Definition: node_funcs.h:197
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
int nat64_add_del_interface(u32 sw_if_index, u8 is_inside, u8 is_add)
Enable/disable NAT64 feature on the interface.
Definition: nat64.c:414
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
u32 nat64_expire_walk_node_index
Definition: nat64.h:107
u32 index
Definition: node.h:282
ip4_address_t * ip4_interface_first_address(ip4_main_t *im, u32 sw_if_index, ip_interface_address_t **result_ia)
Definition: ip4_forward.c:281
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:291
u16 port_per_thread
Definition: nat.h:532
u32 vlib_frame_queue_main_init(u32 node_index, u32 frame_queue_nelts)
Definition: threads.c:1854
u32 thread_index
Definition: main.h:218
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:590
nat64_db_bib_entry_t * nat64_db_bib_entry_find(nat64_db_t *db, ip46_address_t *addr, u16 port, u8 proto, u32 fib_index, u8 is_ip6)
Find NAT64 BIB entry.
Definition: nat64_db.c:209
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:628
#define NAT_INTERFACE_FLAG_IS_OUTSIDE
Definition: nat.h:243
u32 tcp_trans_timeout
Definition: nat64.h:101
nat_protocol_t
Definition: lib.h:41
void snat_add_del_addr_to_fib(ip4_address_t *addr, u8 p_len, u32 sw_if_index, int is_add)
Add/del NAT address to FIB.
Definition: nat.c:608
u32 in2out_node_index
Definition: nat64.h:116
vl_api_prefix_t prefix
Definition: ip.api:144
nat_alloc_out_addr_and_port_function_t * alloc_addr_and_port
Definition: nat.h:554
int nat64_add_interface_address(u32 sw_if_index, int is_add)
NAT64 pool address from specific (DHCP addressed) interface.
Definition: nat64.c:372
nat64_db_bib_t bib
Definition: nat64_db.h:138
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:252
struct _tcp_header tcp_header_t
vhost_vring_addr_t addr
Definition: vhost_user.h:254
u32 * auto_add_sw_if_indices
sw_if_indices whose interface addresses should be auto-added
Definition: nat64.h:77
vlib_main_t ** vlib_mains
Definition: buffer.c:332
unsigned char u8
Definition: types.h:56
u32 st_entries_num
Definition: nat64_db.h:123
#define nat_interface_is_outside(i)
Check if NAT interface is outside.
Definition: nat.h:776
static void nat64_ip4_add_del_interface_address_cb(ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address, u32 address_length, u32 if_address_index, u32 is_delete)
Definition: nat64.c:70
vl_api_ip_proto_t protocol
Definition: lb_types.api:71
u32 nat64_get_worker_in2out(ip6_address_t *addr)
Get worker thread index for NAT64 in2out.
Definition: nat64.c:105
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:513
static nat_protocol_t ip_proto_to_nat_proto(u8 ip_proto)
Common NAT inline functions.
Definition: inlines.h:22
vl_api_interface_index_t sw_if_index
Definition: gre.api:53
static uword vlib_process_get_events(vlib_main_t *vm, uword **data_vector)
Return the first event type which has occurred and a vector of per-event data of that type...
Definition: node_funcs.h:516
vl_api_ip6_address_t ip6
Definition: one.api:424
ip4_address_t dst_address
Definition: ip4_packet.h:170
u32 total_enabled_count
Definition: nat64.h:105
int nat64_set_icmp_timeout(u32 timeout)
Set ICMP session timeout.
Definition: nat64.c:813
static_always_inline u8 icmp_type_is_error_message(u8 icmp_type)
Definition: inlines.h:53
u32 tcp_est_timeout
Definition: nat64.h:102
static void * ip4_next_header(ip4_header_t *i)
Definition: ip4_packet.h:241
snat_main_t * sm
Definition: nat64.h:122
unsigned int u32
Definition: types.h:88
vlib_node_registration_t nat64_in2out_node
(constructor) VLIB_REGISTER_NODE (nat64_in2out_node)
void nat64_tcp_session_set_state(nat64_db_st_entry_t *ste, tcp_header_t *tcp, u8 is_ip6)
Set NAT64 TCP session state.
Definition: nat64.c:907
snat_interface_t * interfaces
Interface pool.
Definition: nat64.h:71
bool is_ip6
Definition: ip.api:43
u32 in2out_slowpath_node_index
Definition: nat64.h:117
char * name
The counter collection&#39;s name.
Definition: counter.h:64
u32 fib_index
Definition: nat64.h:52
u32 udp_timeout
values of various timeouts
Definition: nat64.h:99
ip4_address_t out_addr
Definition: nat64.h:59
nat64_prefix_t * pref64
Pref64 vector.
Definition: nat64.h:80
ip6_address_t in_addr
Definition: nat64.h:57
vlib_node_t * vlib_get_node_by_name(vlib_main_t *vm, u8 *name)
Definition: node.c:45
static void vlib_process_signal_event(vlib_main_t *vm, uword node_index, uword type_opaque, uword data)
Definition: node_funcs.h:934
void nat64_session_reset_timeout(nat64_db_st_entry_t *ste, vlib_main_t *vm)
Reset NAT64 session timeout.
Definition: nat64.c:868
void nad64_db_st_free_expired(u32 thread_index, nat64_db_t *db, u32 now)
Free expired session entries in session tables.
Definition: nat64_db.c:651
IPv6 shallow virtual reassembly.
vl_api_ip_proto_t proto
Definition: acl_types.api:50
IPv4 shallow virtual reassembly.
long ctx[MAX_CONNS]
Definition: main.c:144
u32 nat64_get_udp_timeout(void)
Get UDP session timeout.
Definition: nat64.c:805
unsigned short u16
Definition: types.h:57
u16 protocol
Definition: nat.h:80
#define SNAT_UDP_TIMEOUT
Definition: nat.h:40
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:302
uword st_memory_size
Definition: nat64.h:96
nat64_db_st_t st
Definition: nat64_db.h:139
#define PREDICT_FALSE(x)
Definition: clib.h:118
#define vec_del1(v, i)
Delete the element at index I.
Definition: vec.h:873
vl_api_ip4_address_t ip4
Definition: one.api:376
static uword nat64_expire_walk_fn(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Centralized process to drive per worker expire walk.
Definition: nat64.c:1211
#define nat_interface_is_inside(i)
Check if NAT interface is inside.
Definition: nat.h:770
#define TCP_FLAG_FIN
Definition: fa_node.h:12
static void vlib_set_simple_counter(vlib_simple_counter_main_t *cm, u32 thread_index, u32 index, u64 value)
Set a simple counter.
Definition: counter.h:94
void fib_table_unlock(u32 fib_index, fib_protocol_t proto, fib_source_t source)
Take a reference counting lock on the table.
Definition: fib_table.c:1291
vlib_main_t * vm
Definition: in2out_ed.c:1599
void nat64_compose_ip6(ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
Compose IPv4-embedded IPv6 addresses.
Definition: nat64.c:1037
#define TCP_FLAG_RST
Definition: fa_node.h:14
vlib_simple_counter_main_t total_sessions
Definition: nat64.h:111
static u8 well_known_prefix[]
Definition: nat64.c:60
snat_main_t snat_main
Definition: nat.c:41
u32 nat64_get_tcp_est_timeout(void)
Get TCP established timeout.
Definition: nat64.c:860
void nat64_set_hash(u32 bib_buckets, uword bib_memory_size, u32 st_buckets, uword st_memory_size)
Set NAT64 hash tables configuration.
Definition: nat64.c:259
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
vlib_node_registration_t nat64_out2in_node
(constructor) VLIB_REGISTER_NODE (nat64_out2in_node)
Definition: nat64_out2in.c:667
void nat64_pool_addr_walk(nat64_pool_addr_walk_fn_t fn, void *ctx)
Walk NAT64 pool.
Definition: nat64.c:357
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:218
sll srl srl sll sra u16x4 i
Definition: vector_sse42.h:317
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:380
ip4_add_del_interface_address_function_t * function
Definition: ip4.h:74
int nat64_add_del_prefix(ip6_address_t *prefix, u8 plen, u32 vrf_id, u8 is_add)
Add/delete NAT64 prefix.
Definition: nat64.c:974
u32 bib_buckets
config parameters
Definition: nat64.h:93
#define nat_elog_notice_X1(nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1)
Definition: nat.h:997
ip4_address_t addr
Definition: nat.h:78
nat64_main_t nat64_main
Definition: nat64.c:29
u32 fq_out2in_index
Definition: nat64.h:87
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1599
nat64_db_bib_entry_t * nat64_db_bib_entry_create(u32 thread_index, nat64_db_t *db, ip6_address_t *in_addr, ip4_address_t *out_addr, u16 in_port, u16 out_port, u32 fib_index, u8 proto, u8 is_static)
Create new NAT64 BIB entry.
Definition: nat64_db.c:53
u32 vrf_id
Definition: nat64.h:51
void vlib_validate_simple_counter(vlib_simple_counter_main_t *cm, u32 index)
validate a simple counter
Definition: counter.c:79
#define pool_put_index(p, i)
Free pool element with given index.
Definition: pool.h:331
#define NAT_INTERFACE_FLAG_IS_INSIDE
Definition: nat.h:242
u32 nat64_get_worker_out2in(vlib_buffer_t *b, ip4_header_t *ip)
Get worker thread index for NAT64 out2in.
Definition: nat64.c:128
u32 num_workers
Definition: nat.h:527
manual_print typedef address
Definition: ip_types.api:85
u32 first_worker_index
Definition: nat.h:528
u32 fq_in2out_index
Worker handoff.
Definition: nat64.h:86
uword bib_memory_size
Definition: nat64.h:94
nat64_static_bib_to_update_t * static_bibs
Pool of static BIB entries to be added/deleted in worker threads.
Definition: nat64.h:90
IPv4 main type.
Definition: ip4.h:106
static void nat64_free_out_addr_and_port(struct nat64_db_s *db, ip4_address_t *addr, u16 port, u8 protocol)
Definition: nat64.c:556
u32 fib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id, fib_source_t src)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:1156
fib_source_t nat_fib_src_hi
Definition: dslite.c:22
static void vlib_zero_simple_counter(vlib_simple_counter_main_t *cm, u32 index)
Clear a simple counter Clears the set of per-thread u16 counters, and the u64 counter.
Definition: counter.h:139
static uword nat64_expire_worker_walk_fn(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Per worker process checking expire time for NAT64 sessions.
Definition: nat64.c:1177
u32 bib_entries_num
Definition: nat64_db.h:73
int nat64_add_del_pool_addr(u32 thread_index, ip4_address_t *addr, u32 vrf_id, u8 is_add)
Add/delete address to NAT64 pool.
Definition: nat64.c:281
ip4_address_t addr
Definition: nat.h:314
int ip6_sv_reass_enable_disable_with_refcnt(u32 sw_if_index, int is_enable)
#define VNET_FEATURES(...)
Definition: feature.h:470
void nat64_prefix_walk(nat64_prefix_walk_fn_t fn, void *ctx)
Walk NAT64 prefixes.
Definition: nat64.c:1022
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
static uword is_pow2(uword x)
Definition: clib.h:250
void nat64_interfaces_walk(nat64_interface_walk_fn_t fn, void *ctx)
Walk NAT64 interfaces.
Definition: nat64.c:512
int nat64_db_init(nat64_db_t *db, u32 bib_buckets, uword bib_memory_size, u32 st_buckets, uword st_memory_size, nat64_db_free_addr_port_function_t free_addr_port_cb)
Initialize NAT64 DB.
Definition: nat64_db.c:26
clib_error_t * nat64_init(vlib_main_t *vm)
Initialize NAT64.
Definition: nat64.c:201
struct _vlib_node_registration vlib_node_registration_t
NAT64 global declarations.
int nat64_set_tcp_timeouts(u32 trans, u32 est)
Set TCP session timeouts.
Definition: nat64.c:834
ip4_main_t * ip4_main
Definition: nat64.h:121
static vlib_node_registration_t nat64_expire_walk_node
(constructor) VLIB_REGISTER_NODE (nat64_expire_walk_node)
Definition: nat64.c:1205
char * stat_segment_name
Name in stat segment directory.
Definition: counter.h:65
#define nat_elog_err(nat_elog_str)
Definition: nat.h:990
vl_api_address_t ip
Definition: l2.api:501
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
VLIB buffer representation.
Definition: buffer.h:102
u32 * workers
Definition: nat.h:529
u64 uword
Definition: types.h:112
static uword nat64_static_bib_worker_fn(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Add/delete static BIB entry in worker thread.
Definition: nat64.c:594
u32 error_node_index
node index
Definition: nat64.h:114
u16 port
Definition: lb_types.api:72
void nat64_db_bib_entry_free(u32 thread_index, nat64_db_t *db, nat64_db_bib_entry_t *bibe)
Free NAT64 BIB entry.
Definition: nat64_db.c:129
#define SNAT_ICMP_TIMEOUT
Definition: nat.h:43
#define vnet_buffer(b)
Definition: buffer.h:417
NAT64 DB.
static vlib_node_registration_t nat64_expire_worker_walk_node
(constructor) VLIB_REGISTER_NODE (nat64_expire_worker_walk_node)
Definition: nat64.c:1194
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1144
static vlib_thread_main_t * vlib_get_thread_main()
Definition: global_funcs.h:32
#define vec_foreach(var, vec)
Vector iterator.
static vlib_node_registration_t nat64_static_bib_worker_node
(constructor) VLIB_REGISTER_NODE (nat64_static_bib_worker_node)
Definition: nat64.c:646
u32 vrf_id
Definition: nat.api:856
VNET_FEATURE_INIT(nat64_in2out, static)
#define SNAT_TCP_TRANSITORY_TIMEOUT
Definition: nat.h:41
int nat64_add_del_static_bib_entry(ip6_address_t *in_addr, ip4_address_t *out_addr, u16 in_port, u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
Add/delete static NAT64 BIB entry.
Definition: nat64.c:658
int(* nat64_prefix_walk_fn_t)(nat64_prefix_t *pref64, void *ctx)
Call back function when walking addresses in NAT64 prefixes, non-zero return value stop walk...
Definition: nat64.h:325
u32 fib_index
Definition: nat.h:315
u32 nat64_get_tcp_trans_timeout(void)
Get TCP transitory timeout.
Definition: nat64.c:852
int(* nat64_interface_walk_fn_t)(snat_interface_t *i, void *ctx)
Call back function when walking interfaces with NAT64 feature, non-zero return value stop walk...
Definition: nat64.h:181
int vnet_feature_enable_disable(const char *arc_name, const char *node_name, u32 sw_if_index, int enable_disable, void *feature_config, u32 n_feature_config_bytes)
Definition: feature.c:304
vlib_simple_counter_main_t total_bibs
Definition: nat64.h:110
int(* nat64_pool_addr_walk_fn_t)(snat_address_t *addr, void *ctx)
Call back function when walking addresses in NAT64 pool, non-zero return value stop walk...
Definition: nat64.h:146