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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_reass.h>
23 #include <nat/nat_inlines.h>
24 #include <vnet/fib/ip4_fib.h>
25 #include <vppinfra/crc32.h>
26 
27 
29 
30 /* *INDENT-OFF* */
31 
32 /* Hook up input features */
33 VNET_FEATURE_INIT (nat64_in2out, static) = {
34  .arc_name = "ip6-unicast",
35  .node_name = "nat64-in2out",
36  .runs_before = VNET_FEATURES ("ip6-lookup"),
37 };
38 VNET_FEATURE_INIT (nat64_out2in, static) = {
39  .arc_name = "ip4-unicast",
40  .node_name = "nat64-out2in",
41  .runs_before = VNET_FEATURES ("ip4-lookup"),
42 };
43 VNET_FEATURE_INIT (nat64_in2out_handoff, static) = {
44  .arc_name = "ip6-unicast",
45  .node_name = "nat64-in2out-handoff",
46  .runs_before = VNET_FEATURES ("ip6-lookup"),
47 };
48 VNET_FEATURE_INIT (nat64_out2in_handoff, static) = {
49  .arc_name = "ip4-unicast",
50  .node_name = "nat64-out2in-handoff",
51  .runs_before = VNET_FEATURES ("ip4-lookup"),
52 };
53 
54 
55 static u8 well_known_prefix[] = {
56  0x00, 0x64, 0xff, 0x9b,
57  0x00, 0x00, 0x00, 0x00,
58  0x00, 0x00, 0x00, 0x00,
59  0x00, 0x00, 0x00, 0x00
60 };
61 
62 /* *INDENT-ON* */
63 
64 static void
66  u32 sw_if_index,
69  u32 if_address_index, u32 is_delete)
70 {
71  nat64_main_t *nm = &nat64_main;
72  int i, j;
73 
74  for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
75  {
76  if (sw_if_index == nm->auto_add_sw_if_indices[i])
77  {
78  if (!is_delete)
79  {
80  /* Don't trip over lease renewal, static config */
81  for (j = 0; j < vec_len (nm->addr_pool); j++)
82  if (nm->addr_pool[j].addr.as_u32 == address->as_u32)
83  return;
84 
85  (void) nat64_add_del_pool_addr (address, ~0, 1);
86  return;
87  }
88  else
89  {
90  (void) nat64_add_del_pool_addr (address, ~0, 0);
91  return;
92  }
93  }
94  }
95 }
96 
97 u32
99 {
100  nat64_main_t *nm = &nat64_main;
101  snat_main_t *sm = nm->sm;
102  u32 next_worker_index = nm->sm->first_worker_index;
103  u32 hash;
104 
105 #ifdef clib_crc32c_uses_intrinsics
106  hash = clib_crc32c ((u8 *) addr->as_u32, 16);
107 #else
108  u64 tmp = addr->as_u64[0] ^ addr->as_u64[1];
109  hash = clib_xxhash (tmp);
110 #endif
111 
112  if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
113  next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
114  else
115  next_worker_index += sm->workers[hash % _vec_len (sm->workers)];
116 
117  return next_worker_index;
118 }
119 
120 u32
122 {
123  nat64_main_t *nm = &nat64_main;
124  snat_main_t *sm = nm->sm;
125  udp_header_t *udp;
126  u16 port;
127  u32 proto;
128 
129  proto = ip_proto_to_snat_proto (ip->protocol);
130  udp = ip4_next_header (ip);
131  port = udp->dst_port;
132 
133  /* fragments */
134  if (PREDICT_FALSE (ip4_is_fragment (ip)))
135  {
137  return vlib_get_thread_index ();
138 
140  {
141  nat_reass_ip4_t *reass;
142 
143  reass = nat_ip4_reass_find (ip->src_address, ip->dst_address,
144  ip->fragment_id, ip->protocol);
145 
146  if (reass && (reass->thread_index != (u32) ~ 0))
147  return reass->thread_index;
148  else
149  return vlib_get_thread_index ();
150  }
151  }
152 
153  /* unknown protocol */
154  if (PREDICT_FALSE (proto == ~0))
155  {
156  nat64_db_t *db;
157  ip46_address_t daddr;
158  nat64_db_bib_entry_t *bibe;
159 
160  memset (&daddr, 0, sizeof (daddr));
161  daddr.ip4.as_u32 = ip->dst_address.as_u32;
162 
163  /* *INDENT-OFF* */
164  vec_foreach (db, nm->db)
165  {
166  bibe = nat64_db_bib_entry_find (db, &daddr, 0, ip->protocol, 0, 0);
167  if (bibe)
168  return (u32) (db - nm->db);
169  }
170  /* *INDENT-ON* */
171  return vlib_get_thread_index ();
172  }
173 
174  /* ICMP */
175  if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP))
176  {
177  icmp46_header_t *icmp = (icmp46_header_t *) udp;
178  icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
179  if (!icmp_is_error_message (icmp))
180  port = echo->identifier;
181  else
182  {
183  ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
184  proto = ip_proto_to_snat_proto (inner_ip->protocol);
185  void *l4_header = ip4_next_header (inner_ip);
186  switch (proto)
187  {
188  case SNAT_PROTOCOL_ICMP:
189  icmp = (icmp46_header_t *) l4_header;
190  echo = (icmp_echo_header_t *) (icmp + 1);
191  port = echo->identifier;
192  break;
193  case SNAT_PROTOCOL_UDP:
194  case SNAT_PROTOCOL_TCP:
195  port = ((tcp_udp_header_t *) l4_header)->src_port;
196  break;
197  default:
198  return vlib_get_thread_index ();
199  }
200  }
201  }
202 
203  /* worker by outside port (TCP/UDP) */
204  port = clib_net_to_host_u16 (port);
205  if (port > 1024)
206  return nm->sm->first_worker_index + ((port - 1024) / sm->port_per_thread);
207 
208  return vlib_get_thread_index ();
209 }
210 
211 clib_error_t *
213 {
214  nat64_main_t *nm = &nat64_main;
217  ip4_main_t *im = &ip4_main;
218  vlib_node_t *error_drop_node =
219  vlib_get_node_by_name (vm, (u8 *) "error-drop");
220 
221  vec_validate (nm->db, tm->n_vlib_mains - 1);
222 
223  nm->sm = &snat_main;
224 
225  nm->fq_in2out_index = ~0;
226  nm->fq_out2in_index = ~0;
227  nm->error_node_index = error_drop_node->index;
228 
229  /* set session timeouts to default values */
235 
236  nm->total_enabled_count = 0;
237 
238  /* Set up the interface address add/del callback */
240  cb4.function_opaque = 0;
242  nm->ip4_main = im;
243 
244  return 0;
245 }
246 
247 static void nat64_free_out_addr_and_port (struct nat64_db_s *db,
248  ip4_address_t * addr, u16 port,
249  u8 protocol);
250 
251 void
252 nat64_set_hash (u32 bib_buckets, u32 bib_memory_size, u32 st_buckets,
253  u32 st_memory_size)
254 {
255  nat64_main_t *nm = &nat64_main;
256  nat64_db_t *db;
257 
258  nm->bib_buckets = bib_buckets;
259  nm->bib_memory_size = bib_memory_size;
260  nm->st_buckets = st_buckets;
261  nm->st_memory_size = st_memory_size;
262 
263  /* *INDENT-OFF* */
264  vec_foreach (db, nm->db)
265  {
266  if (nat64_db_init (db, bib_buckets, bib_memory_size, st_buckets,
267  st_memory_size, nat64_free_out_addr_and_port))
268  clib_warning ("NAT64 DB init failed");
269  }
270  /* *INDENT-ON* */
271 }
272 
273 int
274 nat64_add_del_pool_addr (ip4_address_t * addr, u32 vrf_id, u8 is_add)
275 {
276  nat64_main_t *nm = &nat64_main;
277  snat_address_t *a = 0;
278  snat_interface_t *interface;
279  int i;
280  nat64_db_t *db;
282 
283  /* Check if address already exists */
284  for (i = 0; i < vec_len (nm->addr_pool); i++)
285  {
286  if (nm->addr_pool[i].addr.as_u32 == addr->as_u32)
287  {
288  a = nm->addr_pool + i;
289  break;
290  }
291  }
292 
293  if (is_add)
294  {
295  if (a)
296  return VNET_API_ERROR_VALUE_EXIST;
297 
298  vec_add2 (nm->addr_pool, a, 1);
299  a->addr = *addr;
300  a->fib_index = ~0;
301  if (vrf_id != ~0)
302  a->fib_index =
305 #define _(N, id, n, s) \
306  clib_bitmap_alloc (a->busy_##n##_port_bitmap, 65535); \
307  a->busy_##n##_ports = 0; \
308  vec_validate_init_empty (a->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
310 #undef _
311  }
312  else
313  {
314  if (!a)
315  return VNET_API_ERROR_NO_SUCH_ENTRY;
316 
317  if (a->fib_index != ~0)
320  /* Delete sessions using address */
321  /* *INDENT-OFF* */
322  vec_foreach (db, nm->db)
323  nat64_db_free_out_addr (db, &a->addr);
324 #define _(N, id, n, s) \
325  clib_bitmap_free (a->busy_##n##_port_bitmap);
327 #undef _
328  /* *INDENT-ON* */
329  vec_del1 (nm->addr_pool, i);
330  }
331 
332  /* Add/del external address to FIB */
333  /* *INDENT-OFF* */
334  pool_foreach (interface, nm->interfaces,
335  ({
336  if (nat_interface_is_inside(interface))
337  continue;
338 
339  snat_add_del_addr_to_fib (addr, 32, interface->sw_if_index, is_add);
340  break;
341  }));
342  /* *INDENT-ON* */
343 
344  return 0;
345 }
346 
347 void
349 {
350  nat64_main_t *nm = &nat64_main;
351  snat_address_t *a = 0;
352 
353  /* *INDENT-OFF* */
354  vec_foreach (a, nm->addr_pool)
355  {
356  if (fn (a, ctx))
357  break;
358  };
359  /* *INDENT-ON* */
360 }
361 
362 int
363 nat64_add_interface_address (u32 sw_if_index, int is_add)
364 {
365  nat64_main_t *nm = &nat64_main;
367  ip4_address_t *first_int_addr;
368  int i;
369 
370  first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0);
371 
372  for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
373  {
374  if (nm->auto_add_sw_if_indices[i] == sw_if_index)
375  {
376  if (is_add)
377  return VNET_API_ERROR_VALUE_EXIST;
378  else
379  {
380  /* if have address remove it */
381  if (first_int_addr)
382  (void) nat64_add_del_pool_addr (first_int_addr, ~0, 0);
383 
385  return 0;
386  }
387  }
388  }
389 
390  if (!is_add)
391  return VNET_API_ERROR_NO_SUCH_ENTRY;
392 
393  /* add to the auto-address list */
394  vec_add1 (nm->auto_add_sw_if_indices, sw_if_index);
395 
396  /* If the address is already bound - or static - add it now */
397  if (first_int_addr)
398  (void) nat64_add_del_pool_addr (first_int_addr, ~0, 1);
399 
400  return 0;
401 }
402 
403 int
404 nat64_add_del_interface (u32 sw_if_index, u8 is_inside, u8 is_add)
405 {
406  nat64_main_t *nm = &nat64_main;
407  snat_interface_t *interface = 0, *i;
408  snat_address_t *ap;
409  const char *feature_name, *arc_name;
410 
411  /* Check if interface already exists */
412  /* *INDENT-OFF* */
413  pool_foreach (i, nm->interfaces,
414  ({
415  if (i->sw_if_index == sw_if_index)
416  {
417  interface = i;
418  break;
419  }
420  }));
421  /* *INDENT-ON* */
422 
423  if (is_add)
424  {
425  if (interface)
426  goto set_flags;
427 
428  pool_get (nm->interfaces, interface);
429  interface->sw_if_index = sw_if_index;
430  interface->flags = 0;
431  set_flags:
432  if (is_inside)
433  interface->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
434  else
435  interface->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
436 
437  nm->total_enabled_count++;
438  vlib_process_signal_event (nm->sm->vlib_main,
439  nm->nat64_expire_walk_node_index,
441 
442  }
443  else
444  {
445  if (!interface)
446  return VNET_API_ERROR_NO_SUCH_ENTRY;
447 
448  if ((nat_interface_is_inside (interface)
449  && nat_interface_is_outside (interface)))
450  interface->flags &=
451  is_inside ? ~NAT_INTERFACE_FLAG_IS_INSIDE :
453  else
454  pool_put (nm->interfaces, interface);
455 
456  nm->total_enabled_count--;
457  }
458 
459  if (!is_inside)
460  {
461  /* *INDENT-OFF* */
462  vec_foreach (ap, nm->addr_pool)
463  snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, is_add);
464  /* *INDENT-ON* */
465  }
466 
467  if (nm->sm->num_workers > 1)
468  {
469  feature_name =
470  is_inside ? "nat64-in2out-handoff" : "nat64-out2in-handoff";
471  if (nm->fq_in2out_index == ~0)
472  nm->fq_in2out_index =
474  if (nm->fq_out2in_index == ~0)
475  nm->fq_out2in_index =
477  }
478  else
479  feature_name = is_inside ? "nat64-in2out" : "nat64-out2in";
480 
481  arc_name = is_inside ? "ip6-unicast" : "ip4-unicast";
482 
483  return vnet_feature_enable_disable (arc_name, feature_name, sw_if_index,
484  is_add, 0, 0);
485 }
486 
487 void
489 {
490  nat64_main_t *nm = &nat64_main;
491  snat_interface_t *i = 0;
492 
493  /* *INDENT-OFF* */
494  pool_foreach (i, nm->interfaces,
495  ({
496  if (fn (i, ctx))
497  break;
498  }));
499  /* *INDENT-ON* */
500 }
501 
502 int
504  ip4_address_t * addr, u16 * port,
505  u32 thread_index)
506 {
507  nat64_main_t *nm = &nat64_main;
508  snat_main_t *sm = nm->sm;
510  u32 ai;
511  u32 worker_index = 0;
512  int rv;
513 
514  k.protocol = proto;
515 
516  if (sm->num_workers > 1)
517  worker_index = thread_index - sm->first_worker_index;
518 
519  rv =
520  sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k, &ai,
521  sm->port_per_thread, worker_index);
522 
523  if (!rv)
524  {
525  *port = k.port;
526  addr->as_u32 = k.addr.as_u32;
527  }
528 
529  return rv;
530 }
531 
532 static void
534  u16 port, u8 protocol)
535 {
536  nat64_main_t *nm = &nat64_main;
537  int i;
538  snat_address_t *a;
539  u32 thread_index = db - nm->db;
540  snat_protocol_t proto = ip_proto_to_snat_proto (protocol);
541  u16 port_host_byte_order = clib_net_to_host_u16 (port);
542 
543  for (i = 0; i < vec_len (nm->addr_pool); i++)
544  {
545  a = nm->addr_pool + i;
546  if (addr->as_u32 != a->addr.as_u32)
547  continue;
548  switch (proto)
549  {
550 #define _(N, j, n, s) \
551  case SNAT_PROTOCOL_##N: \
552  ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
553  port_host_byte_order) == 1); \
554  clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, port, 0); \
555  a->busy_##n##_ports--; \
556  a->busy_##n##_ports_per_thread[thread_index]--; \
557  break;
559 #undef _
560  default:
561  clib_warning ("unknown protocol");
562  return;
563  }
564  break;
565  }
566 }
567 
568 /**
569  * @brief Add/delete static BIB entry in worker thread.
570  */
571 static uword
573  vlib_frame_t * f)
574 {
575  nat64_main_t *nm = &nat64_main;
576  u32 thread_index = vm->thread_index;
577  nat64_db_t *db = &nm->db[thread_index];
578  nat64_static_bib_to_update_t *static_bib;
579  nat64_db_bib_entry_t *bibe;
580  ip46_address_t addr;
581 
582  /* *INDENT-OFF* */
583  pool_foreach (static_bib, nm->static_bibs,
584  ({
585  if ((static_bib->thread_index != thread_index) || (static_bib->done))
586  continue;
587 
588  if (static_bib->is_add)
589  (void) nat64_db_bib_entry_create (db, &static_bib->in_addr,
590  &static_bib->out_addr,
591  static_bib->in_port,
592  static_bib->out_port,
593  static_bib->fib_index,
594  static_bib->proto, 1);
595  else
596  {
597  addr.as_u64[0] = static_bib->in_addr.as_u64[0];
598  addr.as_u64[1] = static_bib->in_addr.as_u64[1];
599  bibe = nat64_db_bib_entry_find (db, &addr, static_bib->in_port,
600  static_bib->proto,
601  static_bib->fib_index, 1);
602  if (bibe)
603  nat64_db_bib_entry_free (db, bibe);
604  }
605 
606  static_bib->done = 1;
607  }));
608  /* *INDENT-ON* */
609 
610  return 0;
611 }
612 
614 
615 /* *INDENT-OFF* */
616 VLIB_REGISTER_NODE (nat64_static_bib_worker_node, static) = {
617  .function = nat64_static_bib_worker_fn,
618  .type = VLIB_NODE_TYPE_INPUT,
619  .state = VLIB_NODE_STATE_INTERRUPT,
620  .name = "nat64-static-bib-worker",
621 };
622 /* *INDENT-ON* */
623 
624 int
626  ip4_address_t * out_addr, u16 in_port,
627  u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
628 {
629  nat64_main_t *nm = &nat64_main;
630  nat64_db_bib_entry_t *bibe;
634  ip46_address_t addr;
635  int i;
636  snat_address_t *a;
637  u32 thread_index = 0;
638  nat64_db_t *db;
639  nat64_static_bib_to_update_t *static_bib;
640  vlib_main_t *worker_vm;
641  u32 *to_be_free = 0, *index;
642 
643  if (nm->sm->num_workers > 1)
644  {
645  thread_index = nat64_get_worker_in2out (in_addr);
646  db = &nm->db[thread_index];
647  }
648  else
649  db = &nm->db[nm->sm->num_workers];
650 
651  addr.as_u64[0] = in_addr->as_u64[0];
652  addr.as_u64[1] = in_addr->as_u64[1];
653  bibe =
654  nat64_db_bib_entry_find (db, &addr, clib_host_to_net_u16 (in_port),
655  proto, fib_index, 1);
656 
657  if (is_add)
658  {
659  if (bibe)
660  return VNET_API_ERROR_VALUE_EXIST;
661 
662  /* outside port must be assigned to same thread as internall address */
663  if ((out_port > 1024) && (nm->sm->num_workers > 1))
664  {
665  if (thread_index != ((out_port - 1024) / nm->sm->port_per_thread))
666  return VNET_API_ERROR_INVALID_VALUE_2;
667  }
668 
669  for (i = 0; i < vec_len (nm->addr_pool); i++)
670  {
671  a = nm->addr_pool + i;
672  if (out_addr->as_u32 != a->addr.as_u32)
673  continue;
674  switch (p)
675  {
676 #define _(N, j, n, s) \
677  case SNAT_PROTOCOL_##N: \
678  if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
679  out_port)) \
680  return VNET_API_ERROR_INVALID_VALUE; \
681  clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
682  out_port, 1); \
683  if (out_port > 1024) \
684  { \
685  a->busy_##n##_ports++; \
686  a->busy_##n##_ports_per_thread[thread_index]++; \
687  } \
688  break;
690 #undef _
691  default:
692  memset (&addr, 0, sizeof (addr));
693  addr.ip4.as_u32 = out_addr->as_u32;
694  if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
695  return VNET_API_ERROR_INVALID_VALUE;
696  }
697  break;
698  }
699  if (!nm->sm->num_workers)
700  {
701  bibe =
702  nat64_db_bib_entry_create (db, in_addr, out_addr,
703  clib_host_to_net_u16 (in_port),
704  clib_host_to_net_u16 (out_port),
705  fib_index, proto, 1);
706  if (!bibe)
707  return VNET_API_ERROR_UNSPECIFIED;
708  }
709  }
710  else
711  {
712  if (!bibe)
713  return VNET_API_ERROR_NO_SUCH_ENTRY;
714 
715  if (!nm->sm->num_workers)
716  nat64_db_bib_entry_free (db, bibe);
717  }
718 
719  if (nm->sm->num_workers)
720  {
721  /* *INDENT-OFF* */
722  pool_foreach (static_bib, nm->static_bibs,
723  ({
724  if (static_bib->done)
725  vec_add1 (to_be_free, static_bib - nm->static_bibs);
726  }));
727  vec_foreach (index, to_be_free)
728  pool_put_index (nm->static_bibs, index[0]);
729  /* *INDENT-ON* */
730  vec_free (to_be_free);
731  pool_get (nm->static_bibs, static_bib);
732  static_bib->in_addr.as_u64[0] = in_addr->as_u64[0];
733  static_bib->in_addr.as_u64[1] = in_addr->as_u64[1];
734  static_bib->in_port = clib_host_to_net_u16 (in_port);
735  static_bib->out_addr.as_u32 = out_addr->as_u32;
736  static_bib->out_port = clib_host_to_net_u16 (out_port);
737  static_bib->fib_index = fib_index;
738  static_bib->proto = proto;
739  static_bib->is_add = is_add;
740  static_bib->thread_index = thread_index;
741  static_bib->done = 0;
742  worker_vm = vlib_mains[thread_index];
743  if (worker_vm)
745  nat64_static_bib_worker_node.index);
746  else
747  return VNET_API_ERROR_UNSPECIFIED;
748  }
749 
750  return 0;
751 }
752 
753 int
755 {
756  nat64_main_t *nm = &nat64_main;
757 
758  if (timeout == 0)
760  else if (timeout < SNAT_UDP_TIMEOUT_MIN)
761  return VNET_API_ERROR_INVALID_VALUE;
762  else
763  nm->udp_timeout = timeout;
764 
765  return 0;
766 }
767 
768 u32
770 {
771  nat64_main_t *nm = &nat64_main;
772 
773  return nm->udp_timeout;
774 }
775 
776 int
778 {
779  nat64_main_t *nm = &nat64_main;
780 
781  if (timeout == 0)
783  else
784  nm->icmp_timeout = timeout;
785 
786  return 0;
787 }
788 
789 u32
791 {
792  nat64_main_t *nm = &nat64_main;
793 
794  return nm->icmp_timeout;
795 }
796 
797 int
798 nat64_set_tcp_timeouts (u32 trans, u32 est, u32 incoming_syn)
799 {
800  nat64_main_t *nm = &nat64_main;
801 
802  if (trans == 0)
804  else
805  nm->tcp_trans_timeout = trans;
806 
807  if (est == 0)
809  else
810  nm->tcp_est_timeout = est;
811 
812  if (incoming_syn == 0)
814  else
815  nm->tcp_incoming_syn_timeout = incoming_syn;
816 
817  return 0;
818 }
819 
820 u32
822 {
823  nat64_main_t *nm = &nat64_main;
824 
825  return nm->tcp_trans_timeout;
826 }
827 
828 u32
830 {
831  nat64_main_t *nm = &nat64_main;
832 
833  return nm->tcp_est_timeout;
834 }
835 
836 u32
838 {
839  nat64_main_t *nm = &nat64_main;
840 
841  return nm->tcp_incoming_syn_timeout;
842 }
843 
844 void
845 nat64_session_reset_timeout (nat64_db_st_entry_t * ste, vlib_main_t * vm)
846 {
847  nat64_main_t *nm = &nat64_main;
848  u32 now = (u32) vlib_time_now (vm);
849 
850  switch (ip_proto_to_snat_proto (ste->proto))
851  {
852  case SNAT_PROTOCOL_ICMP:
853  ste->expire = now + nm->icmp_timeout;
854  return;
855  case SNAT_PROTOCOL_TCP:
856  {
857  switch (ste->tcp_state)
858  {
859  case NAT64_TCP_STATE_V4_INIT:
860  case NAT64_TCP_STATE_V6_INIT:
861  case NAT64_TCP_STATE_V4_FIN_RCV:
862  case NAT64_TCP_STATE_V6_FIN_RCV:
863  case NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV:
864  case NAT64_TCP_STATE_TRANS:
865  ste->expire = now + nm->tcp_trans_timeout;
866  return;
867  case NAT64_TCP_STATE_ESTABLISHED:
868  ste->expire = now + nm->tcp_est_timeout;
869  return;
870  default:
871  return;
872  }
873  }
874  case SNAT_PROTOCOL_UDP:
875  ste->expire = now + nm->udp_timeout;
876  return;
877  default:
878  ste->expire = now + nm->udp_timeout;
879  return;
880  }
881 }
882 
883 void
884 nat64_tcp_session_set_state (nat64_db_st_entry_t * ste, tcp_header_t * tcp,
885  u8 is_ip6)
886 {
887  switch (ste->tcp_state)
888  {
889  case NAT64_TCP_STATE_CLOSED:
890  {
891  if (tcp->flags & TCP_FLAG_SYN)
892  {
893  if (is_ip6)
894  ste->tcp_state = NAT64_TCP_STATE_V6_INIT;
895  else
896  ste->tcp_state = NAT64_TCP_STATE_V4_INIT;
897  }
898  return;
899  }
900  case NAT64_TCP_STATE_V4_INIT:
901  {
902  if (is_ip6 && (tcp->flags & TCP_FLAG_SYN))
903  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
904  return;
905  }
906  case NAT64_TCP_STATE_V6_INIT:
907  {
908  if (!is_ip6 && (tcp->flags & TCP_FLAG_SYN))
909  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
910  return;
911  }
912  case NAT64_TCP_STATE_ESTABLISHED:
913  {
914  if (tcp->flags & TCP_FLAG_FIN)
915  {
916  if (is_ip6)
917  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_RCV;
918  else
919  ste->tcp_state = NAT64_TCP_STATE_V4_FIN_RCV;
920  }
921  else if (tcp->flags & TCP_FLAG_RST)
922  {
923  ste->tcp_state = NAT64_TCP_STATE_TRANS;
924  }
925  return;
926  }
927  case NAT64_TCP_STATE_V4_FIN_RCV:
928  {
929  if (is_ip6 && (tcp->flags & TCP_FLAG_FIN))
930  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
931  return;
932  }
933  case NAT64_TCP_STATE_V6_FIN_RCV:
934  {
935  if (!is_ip6 && (tcp->flags & TCP_FLAG_FIN))
936  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
937  return;
938  }
939  case NAT64_TCP_STATE_TRANS:
940  {
941  if (!(tcp->flags & TCP_FLAG_RST))
942  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
943  return;
944  }
945  default:
946  return;
947  }
948 }
949 
950 int
952 {
953  nat64_main_t *nm = &nat64_main;
954  nat64_prefix_t *p = 0;
955  int i;
956 
957  /* Verify prefix length */
958  if (plen != 32 && plen != 40 && plen != 48 && plen != 56 && plen != 64
959  && plen != 96)
960  return VNET_API_ERROR_INVALID_VALUE;
961 
962  /* Check if tenant already have prefix */
963  for (i = 0; i < vec_len (nm->pref64); i++)
964  {
965  if (nm->pref64[i].vrf_id == vrf_id)
966  {
967  p = nm->pref64 + i;
968  break;
969  }
970  }
971 
972  if (is_add)
973  {
974  if (!p)
975  {
976  vec_add2 (nm->pref64, p, 1);
977  p->fib_index =
980  p->vrf_id = vrf_id;
981  }
982 
983  p->prefix.as_u64[0] = prefix->as_u64[0];
984  p->prefix.as_u64[1] = prefix->as_u64[1];
985  p->plen = plen;
986  }
987  else
988  {
989  if (!p)
990  return VNET_API_ERROR_NO_SUCH_ENTRY;
991 
992  vec_del1 (nm->pref64, i);
993  }
994 
995  return 0;
996 }
997 
998 void
1000 {
1001  nat64_main_t *nm = &nat64_main;
1002  nat64_prefix_t *p = 0;
1003 
1004  /* *INDENT-OFF* */
1005  vec_foreach (p, nm->pref64)
1006  {
1007  if (fn (p, ctx))
1008  break;
1009  };
1010  /* *INDENT-ON* */
1011 }
1012 
1013 void
1015 {
1016  nat64_main_t *nm = &nat64_main;
1017  nat64_prefix_t *p, *gp = 0, *prefix = 0;
1018 
1019  /* *INDENT-OFF* */
1020  vec_foreach (p, nm->pref64)
1021  {
1022  if (p->fib_index == fib_index)
1023  {
1024  prefix = p;
1025  break;
1026  }
1027 
1028  if (p->fib_index == 0)
1029  gp = p;
1030  };
1031  /* *INDENT-ON* */
1032 
1033  if (!prefix)
1034  prefix = gp;
1035 
1036  if (prefix)
1037  {
1038  clib_memcpy (ip6, &p->prefix, sizeof (ip6_address_t));
1039  switch (p->plen)
1040  {
1041  case 32:
1042  ip6->as_u32[1] = ip4->as_u32;
1043  break;
1044  case 40:
1045  ip6->as_u8[5] = ip4->as_u8[0];
1046  ip6->as_u8[6] = ip4->as_u8[1];
1047  ip6->as_u8[7] = ip4->as_u8[2];
1048  ip6->as_u8[9] = ip4->as_u8[3];
1049  break;
1050  case 48:
1051  ip6->as_u8[6] = ip4->as_u8[0];
1052  ip6->as_u8[7] = ip4->as_u8[1];
1053  ip6->as_u8[9] = ip4->as_u8[2];
1054  ip6->as_u8[10] = ip4->as_u8[3];
1055  break;
1056  case 56:
1057  ip6->as_u8[7] = ip4->as_u8[0];
1058  ip6->as_u8[9] = ip4->as_u8[1];
1059  ip6->as_u8[10] = ip4->as_u8[2];
1060  ip6->as_u8[11] = ip4->as_u8[3];
1061  break;
1062  case 64:
1063  ip6->as_u8[9] = ip4->as_u8[0];
1064  ip6->as_u8[10] = ip4->as_u8[1];
1065  ip6->as_u8[11] = ip4->as_u8[2];
1066  ip6->as_u8[12] = ip4->as_u8[3];
1067  break;
1068  case 96:
1069  ip6->as_u32[3] = ip4->as_u32;
1070  break;
1071  default:
1072  clib_warning ("invalid prefix length");
1073  break;
1074  }
1075  }
1076  else
1077  {
1078  clib_memcpy (ip6, well_known_prefix, sizeof (ip6_address_t));
1079  ip6->as_u32[3] = ip4->as_u32;
1080  }
1081 }
1082 
1083 void
1085 {
1086  nat64_main_t *nm = &nat64_main;
1087  nat64_prefix_t *p, *gp = 0;
1088  u8 plen = 0;
1089 
1090  /* *INDENT-OFF* */
1091  vec_foreach (p, nm->pref64)
1092  {
1093  if (p->fib_index == fib_index)
1094  {
1095  plen = p->plen;
1096  break;
1097  }
1098 
1099  if (p->vrf_id == 0)
1100  gp = p;
1101  };
1102  /* *INDENT-ON* */
1103 
1104  if (!plen)
1105  {
1106  if (gp)
1107  plen = gp->plen;
1108  else
1109  plen = 96;
1110  }
1111 
1112  switch (plen)
1113  {
1114  case 32:
1115  ip4->as_u32 = ip6->as_u32[1];
1116  break;
1117  case 40:
1118  ip4->as_u8[0] = ip6->as_u8[5];
1119  ip4->as_u8[1] = ip6->as_u8[6];
1120  ip4->as_u8[2] = ip6->as_u8[7];
1121  ip4->as_u8[3] = ip6->as_u8[9];
1122  break;
1123  case 48:
1124  ip4->as_u8[0] = ip6->as_u8[6];
1125  ip4->as_u8[1] = ip6->as_u8[7];
1126  ip4->as_u8[2] = ip6->as_u8[9];
1127  ip4->as_u8[3] = ip6->as_u8[10];
1128  break;
1129  case 56:
1130  ip4->as_u8[0] = ip6->as_u8[7];
1131  ip4->as_u8[1] = ip6->as_u8[9];
1132  ip4->as_u8[2] = ip6->as_u8[10];
1133  ip4->as_u8[3] = ip6->as_u8[11];
1134  break;
1135  case 64:
1136  ip4->as_u8[0] = ip6->as_u8[9];
1137  ip4->as_u8[1] = ip6->as_u8[10];
1138  ip4->as_u8[2] = ip6->as_u8[11];
1139  ip4->as_u8[3] = ip6->as_u8[12];
1140  break;
1141  case 96:
1142  ip4->as_u32 = ip6->as_u32[3];
1143  break;
1144  default:
1145  clib_warning ("invalid prefix length");
1146  break;
1147  }
1148 }
1149 
1150 /**
1151  * @brief Per worker process checking expire time for NAT64 sessions.
1152  */
1153 static uword
1155  vlib_frame_t * f)
1156 {
1157  nat64_main_t *nm = &nat64_main;
1158  u32 thread_index = vm->thread_index;
1159  nat64_db_t *db = &nm->db[thread_index];
1160  u32 now = (u32) vlib_time_now (vm);
1161 
1162  nad64_db_st_free_expired (db, now);
1163 
1164  return 0;
1165 }
1166 
1168 
1169 /* *INDENT-OFF* */
1170 VLIB_REGISTER_NODE (nat64_expire_worker_walk_node, static) = {
1171  .function = nat64_expire_worker_walk_fn,
1172  .type = VLIB_NODE_TYPE_INPUT,
1173  .state = VLIB_NODE_STATE_INTERRUPT,
1174  .name = "nat64-expire-worker-walk",
1175 };
1176 /* *INDENT-ON* */
1177 
1179 
1180 /**
1181  * @brief Centralized process to drive per worker expire walk.
1182  */
1183 static uword
1185  vlib_frame_t * f)
1186 {
1187  nat64_main_t *nm = &nat64_main;
1188  vlib_main_t **worker_vms = 0, *worker_vm;
1189  int i;
1190  uword event_type, *event_data = 0;
1191 
1192  nm->nat64_expire_walk_node_index = nat64_expire_walk_node.index;
1193 
1194  if (vec_len (vlib_mains) == 0)
1195  vec_add1 (worker_vms, vm);
1196  else
1197  {
1198  for (i = 0; i < vec_len (vlib_mains); i++)
1199  {
1200  worker_vm = vlib_mains[i];
1201  if (worker_vm)
1202  vec_add1 (worker_vms, worker_vm);
1203  }
1204  }
1205 
1206  while (1)
1207  {
1208  if (nm->total_enabled_count)
1209  {
1211  event_type = vlib_process_get_events (vm, &event_data);
1212  }
1213  else
1214  {
1216  event_type = vlib_process_get_events (vm, &event_data);
1217  }
1218 
1219  switch (event_type)
1220  {
1221  case ~0:
1222  break;
1224  break;
1225  default:
1226  clib_warning ("unknown event %u", event_type);
1227  break;
1228  }
1229 
1230  for (i = 0; i < vec_len (worker_vms); i++)
1231  {
1232  worker_vm = worker_vms[i];
1234  nat64_expire_worker_walk_node.index);
1235  }
1236  }
1237 
1238  return 0;
1239 }
1240 
1241 /* *INDENT-OFF* */
1242 VLIB_REGISTER_NODE (nat64_expire_walk_node, static) = {
1243  .function = nat64_expire_walk_fn,
1244  .type = VLIB_NODE_TYPE_PROCESS,
1245  .name = "nat64-expire-walk",
1246 };
1247 /* *INDENT-ON* */
1248 
1249 /*
1250  * fd.io coding-style-patch-verification: ON
1251  *
1252  * Local Variables:
1253  * eval: (c-set-style "gnu")
1254  * End:
1255  */
u32 nat64_get_icmp_timeout(void)
Get ICMP session timeout.
Definition: nat64.c:790
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:437
nat64_db_t * db
BIB and session DB per thread.
Definition: nat64.h:83
typedef address
Definition: ip_types.api:35
u32 icmp_timeout
Definition: nat64.h:102
int nat64_db_init(nat64_db_t *db, u32 bib_buckets, u32 bib_memory_size, u32 st_buckets, u32 st_memory_size, nat64_db_free_addr_port_function_t free_addr_port_cb)
Initialize NAT64 DB.
Definition: nat64_db.c:25
int nat64_set_udp_timeout(u32 timeout)
Set UDP session timeout.
Definition: nat64.c:754
ip4_add_del_interface_address_callback_t * add_del_interface_address_callbacks
Functions to call when interface address changes.
Definition: ip4.h:129
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:699
a
Definition: bitmap.h:538
static uword * vlib_process_wait_for_event(vlib_main_t *vm)
Definition: node_funcs.h:619
ip4_address_t src_address
Definition: ip4_packet.h:169
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
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:1084
#define SNAT_TCP_ESTABLISHED_TIMEOUT
Definition: nat.h:37
#define PREDICT_TRUE(x)
Definition: clib.h:106
u8 as_u8[16]
Definition: ip6_packet.h:48
u64 as_u64[2]
Definition: ip6_packet.h:51
static_always_inline u8 icmp_is_error_message(icmp46_header_t *icmp)
Definition: nat_inlines.h:52
unsigned long u64
Definition: types.h:89
u32 st_buckets
Definition: nat64.h:97
static void vlib_node_set_interrupt_pending(vlib_main_t *vm, u32 node_index)
Definition: node_funcs.h:196
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:404
u32 nat64_expire_walk_node_index
Definition: nat64.h:110
u32 index
Definition: node.h:273
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:320
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:228
nat64_db_bib_entry_t * nat64_db_bib_entry_create(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:52
u16 port_per_thread
Definition: nat.h:332
u32 vlib_frame_queue_main_init(u32 node_index, u32 frame_queue_nelts)
Definition: threads.c:1818
nat_reass_ip4_t * nat_ip4_reass_find(ip4_address_t src, ip4_address_t dst, u16 frag_id, u8 proto)
Find reassembly.
Definition: nat_reass.c:199
int nat64_add_del_pool_addr(ip4_address_t *addr, u32 vrf_id, u8 is_add)
Add/delete address to NAT64 pool.
Definition: nat64.c:274
u32 thread_index
Definition: main.h:179
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:523
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:205
u32 bib_memory_size
Definition: nat64.h:96
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:562
#define NAT_INTERFACE_FLAG_IS_OUTSIDE
Definition: nat.h:147
int i
void nat64_set_hash(u32 bib_buckets, u32 bib_memory_size, u32 st_buckets, u32 st_memory_size)
Set NAT64 hash tables configuration.
Definition: nat64.c:252
u32 tcp_trans_timeout
Definition: nat64.h:103
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:625
nat_alloc_out_addr_and_port_function_t * alloc_addr_and_port
Definition: nat.h:353
int nat64_add_interface_address(u32 sw_if_index, int is_add)
NAT64 pool address from specific (DHCP addressed) interface.
Definition: nat64.c:363
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:228
struct _tcp_header tcp_header_t
vhost_vring_addr_t addr
Definition: vhost_user.h:116
u32 * auto_add_sw_if_indices
sw_if_indices whose interface addresses should be auto-added
Definition: nat64.h:77
int nat64_set_tcp_timeouts(u32 trans, u32 est, u32 incoming_syn)
Set TCP session timeouts.
Definition: nat64.c:798
vlib_main_t ** vlib_mains
Definition: buffer.c:303
unsigned char u8
Definition: types.h:56
u16 identifier
Definition: nat.h:543
#define nat_interface_is_outside(i)
Definition: nat.h:523
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:65
u32 nat64_get_worker_in2out(ip6_address_t *addr)
Get worker thread index for NAT64 in2out.
Definition: nat64.c:98
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:443
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:542
ip4_address_t dst_address
Definition: ip4_packet.h:169
u32 total_enabled_count
Definition: nat64.h:108
int nat64_set_icmp_timeout(u32 timeout)
Set ICMP session timeout.
Definition: nat64.c:777
A high priority source a plugin can use.
Definition: fib_entry.h:62
u32 tcp_est_timeout
Definition: nat64.h:104
static void * ip4_next_header(ip4_header_t *i)
Definition: ip4_packet.h:240
snat_main_t * sm
Definition: nat64.h:113
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:884
snat_interface_t * interfaces
Interface pool.
Definition: nat64.h:71
u32 tcp_incoming_syn_timeout
Definition: nat64.h:105
static int ip4_is_fragment(ip4_header_t *i)
Definition: ip4_packet.h:212
u32 fib_index
Definition: nat64.h:52
u32 udp_timeout
values of various timeouts
Definition: nat64.h:101
u32 nat64_get_worker_out2in(ip4_header_t *ip)
Get worker thread index for NAT64 out2in.
Definition: nat64.c:121
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
u32 st_memory_size
Definition: nat64.h:98
static void vlib_process_signal_event(vlib_main_t *vm, uword node_index, uword type_opaque, uword data)
Definition: node_funcs.h:952
void nat64_session_reset_timeout(nat64_db_st_entry_t *ste, vlib_main_t *vm)
Reset NAT64 session timeout.
Definition: nat64.c:845
void nad64_db_st_free_expired(nat64_db_t *db, u32 now)
Free expired session entries in session tables.
Definition: nat64_db.c:638
u8 address_length
Definition: ip_types.api:42
int nat64_alloc_out_addr_and_port(u32 fib_index, snat_protocol_t proto, ip4_address_t *addr, u16 *port, u32 thread_index)
Alloce IPv4 address and port pair from NAT64 pool.
Definition: nat64.c:503
u32 nat64_get_udp_timeout(void)
Get UDP session timeout.
Definition: nat64.c:769
unsigned short u16
Definition: types.h:57
u16 protocol
Definition: nat.h:53
#define SNAT_UDP_TIMEOUT
Definition: nat.h:34
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:274
void nat64_db_bib_entry_free(nat64_db_t *db, nat64_db_bib_entry_t *bibe)
Free NAT64 BIB entry.
Definition: nat64_db.c:127
#define PREDICT_FALSE(x)
Definition: clib.h:105
#define vec_del1(v, i)
Delete the element at index I.
Definition: vec.h:806
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:1184
#define nat_interface_is_inside(i)
Definition: nat.h:522
#define TCP_FLAG_FIN
Definition: fa_node.h:12
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:1228
void nat64_compose_ip6(ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
Compose IPv4-embedded IPv6 addresses.
Definition: nat64.c:1014
#define TCP_FLAG_RST
Definition: fa_node.h:14
static u8 well_known_prefix[]
Definition: nat64.c:55
snat_main_t snat_main
Definition: nat.c:36
u32 as_u32[4]
Definition: ip6_packet.h:50
u32 nat64_get_tcp_est_timeout(void)
Get TCP established timeout.
Definition: nat64.c:829
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:153
vlib_node_registration_t nat64_out2in_node
(constructor) VLIB_REGISTER_NODE (nat64_out2in_node)
Definition: nat64_out2in.c:525
void nat64_pool_addr_walk(nat64_pool_addr_walk_fn_t fn, void *ctx)
Walk NAT64 pool.
Definition: nat64.c:348
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:221
u8 nat_reass_is_drop_frag(u8 is_ip6)
Get status of virtual fragmentation reassembly.
Definition: nat_reass.c:168
vlib_main_t * vm
Definition: buffer.c:294
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:339
ip4_add_del_interface_address_function_t * function
Definition: ip4.h:72
int nat64_add_del_prefix(ip6_address_t *prefix, u8 plen, u32 vrf_id, u8 is_add)
Add/delete NAT64 prefix.
Definition: nat64.c:951
u32 bib_buckets
config parameters
Definition: nat64.h:95
#define clib_warning(format, args...)
Definition: error.h:59
#define clib_memcpy(a, b, c)
Definition: string.h:75
static int ip4_is_first_fragment(ip4_header_t *i)
Definition: ip4_packet.h:219
ip4_address_t addr
Definition: nat.h:51
vlib_node_t * vlib_get_node_by_name(vlib_main_t *vm, u8 *name)
Definition: node.c:45
nat64_main_t nat64_main
Definition: nat64.c:28
u32 fq_out2in_index
Definition: nat64.h:87
u32 vrf_id
Definition: nat64.h:51
#define pool_put_index(p, i)
Free pool element with given index.
Definition: pool.h:299
#define NAT_INTERFACE_FLAG_IS_INSIDE
Definition: nat.h:146
u32 num_workers
Definition: nat.h:327
u32 first_worker_index
Definition: nat.h:328
u32 nat64_get_tcp_incoming_syn_timeout(void)
Get TCP incoming SYN timeout.
Definition: nat64.c:837
u32 fq_in2out_index
Worker handoff.
Definition: nat64.h:86
long ctx[MAX_CONNS]
Definition: main.c:126
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:95
static void nat64_free_out_addr_and_port(struct nat64_db_s *db, ip4_address_t *addr, u16 port, u8 protocol)
Definition: nat64.c:533
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:1115
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:1154
ip4_address_t addr
Definition: nat.h:195
#define VNET_FEATURES(...)
Definition: feature.h:391
void nat64_prefix_walk(nat64_prefix_walk_fn_t fn, void *ctx)
Walk NAT64 prefixes.
Definition: nat64.c:999
static uword is_pow2(uword x)
Definition: clib.h:229
void nat64_interfaces_walk(nat64_interface_walk_fn_t fn, void *ctx)
Walk NAT64 interfaces.
Definition: nat64.c:488
void nat64_db_free_out_addr(nat64_db_t *db, ip4_address_t *out_addr)
Free sessions using specific outside address.
Definition: nat64_db.c:670
clib_error_t * nat64_init(vlib_main_t *vm)
Initialize NAT64.
Definition: nat64.c:212
struct _vlib_node_registration vlib_node_registration_t
NAT64 global declarations.
ip4_main_t * ip4_main
Definition: nat64.h:112
static vlib_node_registration_t nat64_expire_walk_node
(constructor) VLIB_REGISTER_NODE (nat64_expire_walk_node)
Definition: nat64.c:1178
static u32 ip_proto_to_snat_proto(u8 ip_proto)
The NAT inline functions.
Definition: nat_inlines.h:25
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u32 * workers
Definition: nat.h:329
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:572
snat_protocol_t
Definition: nat.h:107
u32 error_node_index
Definition: nat64.h:92
typedef prefix
Definition: ip_types.api:40
#define SNAT_ICMP_TIMEOUT
Definition: nat.h:39
NAT64 DB.
static vlib_node_registration_t nat64_expire_worker_walk_node
(constructor) VLIB_REGISTER_NODE (nat64_expire_worker_walk_node)
Definition: nat64.c:1167
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:832
static vlib_thread_main_t * vlib_get_thread_main()
Definition: global_funcs.h:32
#define SNAT_UDP_TIMEOUT_MIN
Definition: nat.h:35
#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:613
NAT plugin virtual fragmentation reassembly.
#define SNAT_TCP_INCOMING_SYN
Definition: nat.h:38
VNET_FEATURE_INIT(nat64_in2out, static)
#define SNAT_TCP_TRANSITORY_TIMEOUT
Definition: nat.h:36
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:625
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:322
u32 fib_index
Definition: nat.h:196
u32 nat64_get_tcp_trans_timeout(void)
Get TCP transitory timeout.
Definition: nat64.c:821
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:170
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:233
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:135