FD.io VPP  v18.10-34-gcce845e
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
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 */
234 
235  nm->total_enabled_count = 0;
236 
237  /* Set up the interface address add/del callback */
239  cb4.function_opaque = 0;
241  nm->ip4_main = im;
242 
243  return 0;
244 }
245 
246 static void nat64_free_out_addr_and_port (struct nat64_db_s *db,
247  ip4_address_t * addr, u16 port,
248  u8 protocol);
249 
250 void
251 nat64_set_hash (u32 bib_buckets, u32 bib_memory_size, u32 st_buckets,
252  u32 st_memory_size)
253 {
254  nat64_main_t *nm = &nat64_main;
255  nat64_db_t *db;
256 
257  nm->bib_buckets = bib_buckets;
258  nm->bib_memory_size = bib_memory_size;
259  nm->st_buckets = st_buckets;
260  nm->st_memory_size = st_memory_size;
261 
262  /* *INDENT-OFF* */
263  vec_foreach (db, nm->db)
264  {
265  if (nat64_db_init (db, bib_buckets, bib_memory_size, st_buckets,
266  st_memory_size, nat64_free_out_addr_and_port))
267  nat_log_err ("NAT64 DB init failed");
268  }
269  /* *INDENT-ON* */
270 }
271 
272 int
273 nat64_add_del_pool_addr (ip4_address_t * addr, u32 vrf_id, u8 is_add)
274 {
275  nat64_main_t *nm = &nat64_main;
276  snat_address_t *a = 0;
277  snat_interface_t *interface;
278  int i;
279  nat64_db_t *db;
281 
282  /* Check if address already exists */
283  for (i = 0; i < vec_len (nm->addr_pool); i++)
284  {
285  if (nm->addr_pool[i].addr.as_u32 == addr->as_u32)
286  {
287  a = nm->addr_pool + i;
288  break;
289  }
290  }
291 
292  if (is_add)
293  {
294  if (a)
295  return VNET_API_ERROR_VALUE_EXIST;
296 
297  vec_add2 (nm->addr_pool, a, 1);
298  a->addr = *addr;
299  a->fib_index = ~0;
300  if (vrf_id != ~0)
301  a->fib_index =
304 #define _(N, id, n, s) \
305  clib_bitmap_alloc (a->busy_##n##_port_bitmap, 65535); \
306  a->busy_##n##_ports = 0; \
307  vec_validate_init_empty (a->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
309 #undef _
310  }
311  else
312  {
313  if (!a)
314  return VNET_API_ERROR_NO_SUCH_ENTRY;
315 
316  if (a->fib_index != ~0)
319  /* Delete sessions using address */
320  /* *INDENT-OFF* */
321  vec_foreach (db, nm->db)
322  nat64_db_free_out_addr (db, &a->addr);
323 #define _(N, id, n, s) \
324  clib_bitmap_free (a->busy_##n##_port_bitmap);
326 #undef _
327  /* *INDENT-ON* */
328  vec_del1 (nm->addr_pool, i);
329  }
330 
331  /* Add/del external address to FIB */
332  /* *INDENT-OFF* */
333  pool_foreach (interface, nm->interfaces,
334  ({
335  if (nat_interface_is_inside(interface))
336  continue;
337 
338  snat_add_del_addr_to_fib (addr, 32, interface->sw_if_index, is_add);
339  break;
340  }));
341  /* *INDENT-ON* */
342 
343  return 0;
344 }
345 
346 void
348 {
349  nat64_main_t *nm = &nat64_main;
350  snat_address_t *a = 0;
351 
352  /* *INDENT-OFF* */
353  vec_foreach (a, nm->addr_pool)
354  {
355  if (fn (a, ctx))
356  break;
357  };
358  /* *INDENT-ON* */
359 }
360 
361 int
363 {
364  nat64_main_t *nm = &nat64_main;
366  ip4_address_t *first_int_addr;
367  int i;
368 
369  first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0);
370 
371  for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
372  {
373  if (nm->auto_add_sw_if_indices[i] == sw_if_index)
374  {
375  if (is_add)
376  return VNET_API_ERROR_VALUE_EXIST;
377  else
378  {
379  /* if have address remove it */
380  if (first_int_addr)
381  (void) nat64_add_del_pool_addr (first_int_addr, ~0, 0);
382 
384  return 0;
385  }
386  }
387  }
388 
389  if (!is_add)
390  return VNET_API_ERROR_NO_SUCH_ENTRY;
391 
392  /* add to the auto-address list */
393  vec_add1 (nm->auto_add_sw_if_indices, sw_if_index);
394 
395  /* If the address is already bound - or static - add it now */
396  if (first_int_addr)
397  (void) nat64_add_del_pool_addr (first_int_addr, ~0, 1);
398 
399  return 0;
400 }
401 
402 int
404 {
405  nat64_main_t *nm = &nat64_main;
406  snat_interface_t *interface = 0, *i;
407  snat_address_t *ap;
408  const char *feature_name, *arc_name;
409 
410  /* Check if interface already exists */
411  /* *INDENT-OFF* */
412  pool_foreach (i, nm->interfaces,
413  ({
414  if (i->sw_if_index == sw_if_index)
415  {
416  interface = i;
417  break;
418  }
419  }));
420  /* *INDENT-ON* */
421 
422  if (is_add)
423  {
424  if (interface)
425  goto set_flags;
426 
427  pool_get (nm->interfaces, interface);
428  interface->sw_if_index = sw_if_index;
429  interface->flags = 0;
430  set_flags:
431  if (is_inside)
432  interface->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
433  else
434  interface->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
435 
436  nm->total_enabled_count++;
437  vlib_process_signal_event (nm->sm->vlib_main,
438  nm->nat64_expire_walk_node_index,
440 
441  }
442  else
443  {
444  if (!interface)
445  return VNET_API_ERROR_NO_SUCH_ENTRY;
446 
447  if ((nat_interface_is_inside (interface)
448  && nat_interface_is_outside (interface)))
449  interface->flags &=
450  is_inside ? ~NAT_INTERFACE_FLAG_IS_INSIDE :
452  else
453  pool_put (nm->interfaces, interface);
454 
455  nm->total_enabled_count--;
456  }
457 
458  if (!is_inside)
459  {
460  /* *INDENT-OFF* */
461  vec_foreach (ap, nm->addr_pool)
462  snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, is_add);
463  /* *INDENT-ON* */
464  }
465 
466  if (nm->sm->num_workers > 1)
467  {
468  feature_name =
469  is_inside ? "nat64-in2out-handoff" : "nat64-out2in-handoff";
470  if (nm->fq_in2out_index == ~0)
471  nm->fq_in2out_index =
473  if (nm->fq_out2in_index == ~0)
474  nm->fq_out2in_index =
476  }
477  else
478  feature_name = is_inside ? "nat64-in2out" : "nat64-out2in";
479 
480  arc_name = is_inside ? "ip6-unicast" : "ip4-unicast";
481 
482  return vnet_feature_enable_disable (arc_name, feature_name, sw_if_index,
483  is_add, 0, 0);
484 }
485 
486 void
488 {
489  nat64_main_t *nm = &nat64_main;
490  snat_interface_t *i = 0;
491 
492  /* *INDENT-OFF* */
493  pool_foreach (i, nm->interfaces,
494  ({
495  if (fn (i, ctx))
496  break;
497  }));
498  /* *INDENT-ON* */
499 }
500 
501 int
503  ip4_address_t * addr, u16 * port,
504  u32 thread_index)
505 {
506  nat64_main_t *nm = &nat64_main;
507  snat_main_t *sm = nm->sm;
509  u32 worker_index = 0;
510  int rv;
511 
512  k.protocol = proto;
513 
514  if (sm->num_workers > 1)
515  worker_index = thread_index - sm->first_worker_index;
516 
517  rv =
518  sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k,
519  sm->port_per_thread, worker_index);
520 
521  if (!rv)
522  {
523  *port = k.port;
524  addr->as_u32 = k.addr.as_u32;
525  }
526 
527  return rv;
528 }
529 
530 static void
532  u16 port, u8 protocol)
533 {
534  nat64_main_t *nm = &nat64_main;
535  int i;
536  snat_address_t *a;
537  u32 thread_index = db - nm->db;
538  snat_protocol_t proto = ip_proto_to_snat_proto (protocol);
539  u16 port_host_byte_order = clib_net_to_host_u16 (port);
540 
541  for (i = 0; i < vec_len (nm->addr_pool); i++)
542  {
543  a = nm->addr_pool + i;
544  if (addr->as_u32 != a->addr.as_u32)
545  continue;
546  switch (proto)
547  {
548 #define _(N, j, n, s) \
549  case SNAT_PROTOCOL_##N: \
550  ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
551  port_host_byte_order) == 1); \
552  clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, port, 0); \
553  a->busy_##n##_ports--; \
554  a->busy_##n##_ports_per_thread[thread_index]--; \
555  break;
557 #undef _
558  default:
559  nat_log_notice ("unknown protocol");
560  return;
561  }
562  break;
563  }
564 }
565 
566 /**
567  * @brief Add/delete static BIB entry in worker thread.
568  */
569 static uword
571  vlib_frame_t * f)
572 {
573  nat64_main_t *nm = &nat64_main;
574  u32 thread_index = vm->thread_index;
575  nat64_db_t *db = &nm->db[thread_index];
576  nat64_static_bib_to_update_t *static_bib;
577  nat64_db_bib_entry_t *bibe;
578  ip46_address_t addr;
579 
580  /* *INDENT-OFF* */
581  pool_foreach (static_bib, nm->static_bibs,
582  ({
583  if ((static_bib->thread_index != thread_index) || (static_bib->done))
584  continue;
585 
586  if (static_bib->is_add)
587  (void) nat64_db_bib_entry_create (db, &static_bib->in_addr,
588  &static_bib->out_addr,
589  static_bib->in_port,
590  static_bib->out_port,
591  static_bib->fib_index,
592  static_bib->proto, 1);
593  else
594  {
595  addr.as_u64[0] = static_bib->in_addr.as_u64[0];
596  addr.as_u64[1] = static_bib->in_addr.as_u64[1];
597  bibe = nat64_db_bib_entry_find (db, &addr, static_bib->in_port,
598  static_bib->proto,
599  static_bib->fib_index, 1);
600  if (bibe)
601  nat64_db_bib_entry_free (db, bibe);
602  }
603 
604  static_bib->done = 1;
605  }));
606  /* *INDENT-ON* */
607 
608  return 0;
609 }
610 
612 
613 /* *INDENT-OFF* */
614 VLIB_REGISTER_NODE (nat64_static_bib_worker_node, static) = {
615  .function = nat64_static_bib_worker_fn,
616  .type = VLIB_NODE_TYPE_INPUT,
617  .state = VLIB_NODE_STATE_INTERRUPT,
618  .name = "nat64-static-bib-worker",
619 };
620 /* *INDENT-ON* */
621 
622 int
624  ip4_address_t * out_addr, u16 in_port,
625  u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
626 {
627  nat64_main_t *nm = &nat64_main;
628  nat64_db_bib_entry_t *bibe;
632  ip46_address_t addr;
633  int i;
634  snat_address_t *a;
635  u32 thread_index = 0;
636  nat64_db_t *db;
637  nat64_static_bib_to_update_t *static_bib;
638  vlib_main_t *worker_vm;
639  u32 *to_be_free = 0, *index;
640 
641  if (nm->sm->num_workers > 1)
642  {
643  thread_index = nat64_get_worker_in2out (in_addr);
644  db = &nm->db[thread_index];
645  }
646  else
647  db = &nm->db[nm->sm->num_workers];
648 
649  addr.as_u64[0] = in_addr->as_u64[0];
650  addr.as_u64[1] = in_addr->as_u64[1];
651  bibe =
652  nat64_db_bib_entry_find (db, &addr, clib_host_to_net_u16 (in_port),
653  proto, fib_index, 1);
654 
655  if (is_add)
656  {
657  if (bibe)
658  return VNET_API_ERROR_VALUE_EXIST;
659 
660  /* outside port must be assigned to same thread as internall address */
661  if ((out_port > 1024) && (nm->sm->num_workers > 1))
662  {
663  if (thread_index != ((out_port - 1024) / nm->sm->port_per_thread))
664  return VNET_API_ERROR_INVALID_VALUE_2;
665  }
666 
667  for (i = 0; i < vec_len (nm->addr_pool); i++)
668  {
669  a = nm->addr_pool + i;
670  if (out_addr->as_u32 != a->addr.as_u32)
671  continue;
672  switch (p)
673  {
674 #define _(N, j, n, s) \
675  case SNAT_PROTOCOL_##N: \
676  if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
677  out_port)) \
678  return VNET_API_ERROR_INVALID_VALUE; \
679  clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
680  out_port, 1); \
681  if (out_port > 1024) \
682  { \
683  a->busy_##n##_ports++; \
684  a->busy_##n##_ports_per_thread[thread_index]++; \
685  } \
686  break;
688 #undef _
689  default:
690  memset (&addr, 0, sizeof (addr));
691  addr.ip4.as_u32 = out_addr->as_u32;
692  if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
693  return VNET_API_ERROR_INVALID_VALUE;
694  }
695  break;
696  }
697  if (!nm->sm->num_workers)
698  {
699  bibe =
700  nat64_db_bib_entry_create (db, in_addr, out_addr,
701  clib_host_to_net_u16 (in_port),
702  clib_host_to_net_u16 (out_port),
703  fib_index, proto, 1);
704  if (!bibe)
705  return VNET_API_ERROR_UNSPECIFIED;
706  }
707  }
708  else
709  {
710  if (!bibe)
711  return VNET_API_ERROR_NO_SUCH_ENTRY;
712 
713  if (!nm->sm->num_workers)
714  nat64_db_bib_entry_free (db, bibe);
715  }
716 
717  if (nm->sm->num_workers)
718  {
719  /* *INDENT-OFF* */
720  pool_foreach (static_bib, nm->static_bibs,
721  ({
722  if (static_bib->done)
723  vec_add1 (to_be_free, static_bib - nm->static_bibs);
724  }));
725  vec_foreach (index, to_be_free)
726  pool_put_index (nm->static_bibs, index[0]);
727  /* *INDENT-ON* */
728  vec_free (to_be_free);
729  pool_get (nm->static_bibs, static_bib);
730  static_bib->in_addr.as_u64[0] = in_addr->as_u64[0];
731  static_bib->in_addr.as_u64[1] = in_addr->as_u64[1];
732  static_bib->in_port = clib_host_to_net_u16 (in_port);
733  static_bib->out_addr.as_u32 = out_addr->as_u32;
734  static_bib->out_port = clib_host_to_net_u16 (out_port);
735  static_bib->fib_index = fib_index;
736  static_bib->proto = proto;
737  static_bib->is_add = is_add;
738  static_bib->thread_index = thread_index;
739  static_bib->done = 0;
740  worker_vm = vlib_mains[thread_index];
741  if (worker_vm)
743  nat64_static_bib_worker_node.index);
744  else
745  return VNET_API_ERROR_UNSPECIFIED;
746  }
747 
748  return 0;
749 }
750 
751 int
753 {
754  nat64_main_t *nm = &nat64_main;
755 
756  if (timeout == 0)
758  else
759  nm->udp_timeout = timeout;
760 
761  return 0;
762 }
763 
764 u32
766 {
767  nat64_main_t *nm = &nat64_main;
768 
769  return nm->udp_timeout;
770 }
771 
772 int
774 {
775  nat64_main_t *nm = &nat64_main;
776 
777  if (timeout == 0)
779  else
780  nm->icmp_timeout = timeout;
781 
782  return 0;
783 }
784 
785 u32
787 {
788  nat64_main_t *nm = &nat64_main;
789 
790  return nm->icmp_timeout;
791 }
792 
793 int
795 {
796  nat64_main_t *nm = &nat64_main;
797 
798  if (trans == 0)
800  else
801  nm->tcp_trans_timeout = trans;
802 
803  if (est == 0)
805  else
806  nm->tcp_est_timeout = est;
807 
808  return 0;
809 }
810 
811 u32
813 {
814  nat64_main_t *nm = &nat64_main;
815 
816  return nm->tcp_trans_timeout;
817 }
818 
819 u32
821 {
822  nat64_main_t *nm = &nat64_main;
823 
824  return nm->tcp_est_timeout;
825 }
826 
827 void
828 nat64_session_reset_timeout (nat64_db_st_entry_t * ste, vlib_main_t * vm)
829 {
830  nat64_main_t *nm = &nat64_main;
831  u32 now = (u32) vlib_time_now (vm);
832 
833  switch (ip_proto_to_snat_proto (ste->proto))
834  {
835  case SNAT_PROTOCOL_ICMP:
836  ste->expire = now + nm->icmp_timeout;
837  return;
838  case SNAT_PROTOCOL_TCP:
839  {
840  switch (ste->tcp_state)
841  {
842  case NAT64_TCP_STATE_V4_INIT:
843  case NAT64_TCP_STATE_V6_INIT:
844  case NAT64_TCP_STATE_V4_FIN_RCV:
845  case NAT64_TCP_STATE_V6_FIN_RCV:
846  case NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV:
847  case NAT64_TCP_STATE_TRANS:
848  ste->expire = now + nm->tcp_trans_timeout;
849  return;
850  case NAT64_TCP_STATE_ESTABLISHED:
851  ste->expire = now + nm->tcp_est_timeout;
852  return;
853  default:
854  return;
855  }
856  }
857  case SNAT_PROTOCOL_UDP:
858  ste->expire = now + nm->udp_timeout;
859  return;
860  default:
861  ste->expire = now + nm->udp_timeout;
862  return;
863  }
864 }
865 
866 void
867 nat64_tcp_session_set_state (nat64_db_st_entry_t * ste, tcp_header_t * tcp,
868  u8 is_ip6)
869 {
870  switch (ste->tcp_state)
871  {
872  case NAT64_TCP_STATE_CLOSED:
873  {
874  if (tcp->flags & TCP_FLAG_SYN)
875  {
876  if (is_ip6)
877  ste->tcp_state = NAT64_TCP_STATE_V6_INIT;
878  else
879  ste->tcp_state = NAT64_TCP_STATE_V4_INIT;
880  }
881  return;
882  }
883  case NAT64_TCP_STATE_V4_INIT:
884  {
885  if (is_ip6 && (tcp->flags & TCP_FLAG_SYN))
886  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
887  return;
888  }
889  case NAT64_TCP_STATE_V6_INIT:
890  {
891  if (!is_ip6 && (tcp->flags & TCP_FLAG_SYN))
892  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
893  return;
894  }
895  case NAT64_TCP_STATE_ESTABLISHED:
896  {
897  if (tcp->flags & TCP_FLAG_FIN)
898  {
899  if (is_ip6)
900  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_RCV;
901  else
902  ste->tcp_state = NAT64_TCP_STATE_V4_FIN_RCV;
903  }
904  else if (tcp->flags & TCP_FLAG_RST)
905  {
906  ste->tcp_state = NAT64_TCP_STATE_TRANS;
907  }
908  return;
909  }
910  case NAT64_TCP_STATE_V4_FIN_RCV:
911  {
912  if (is_ip6 && (tcp->flags & TCP_FLAG_FIN))
913  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
914  return;
915  }
916  case NAT64_TCP_STATE_V6_FIN_RCV:
917  {
918  if (!is_ip6 && (tcp->flags & TCP_FLAG_FIN))
919  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
920  return;
921  }
922  case NAT64_TCP_STATE_TRANS:
923  {
924  if (!(tcp->flags & TCP_FLAG_RST))
925  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
926  return;
927  }
928  default:
929  return;
930  }
931 }
932 
933 int
935 {
936  nat64_main_t *nm = &nat64_main;
937  nat64_prefix_t *p = 0;
938  int i;
939 
940  /* Verify prefix length */
941  if (plen != 32 && plen != 40 && plen != 48 && plen != 56 && plen != 64
942  && plen != 96)
943  return VNET_API_ERROR_INVALID_VALUE;
944 
945  /* Check if tenant already have prefix */
946  for (i = 0; i < vec_len (nm->pref64); i++)
947  {
948  if (nm->pref64[i].vrf_id == vrf_id)
949  {
950  p = nm->pref64 + i;
951  break;
952  }
953  }
954 
955  if (is_add)
956  {
957  if (!p)
958  {
959  vec_add2 (nm->pref64, p, 1);
960  p->fib_index =
963  p->vrf_id = vrf_id;
964  }
965 
966  p->prefix.as_u64[0] = prefix->as_u64[0];
967  p->prefix.as_u64[1] = prefix->as_u64[1];
968  p->plen = plen;
969  }
970  else
971  {
972  if (!p)
973  return VNET_API_ERROR_NO_SUCH_ENTRY;
974 
975  vec_del1 (nm->pref64, i);
976  }
977 
978  return 0;
979 }
980 
981 void
983 {
984  nat64_main_t *nm = &nat64_main;
985  nat64_prefix_t *p = 0;
986 
987  /* *INDENT-OFF* */
988  vec_foreach (p, nm->pref64)
989  {
990  if (fn (p, ctx))
991  break;
992  };
993  /* *INDENT-ON* */
994 }
995 
996 void
998 {
999  nat64_main_t *nm = &nat64_main;
1000  nat64_prefix_t *p, *gp = 0, *prefix = 0;
1001 
1002  /* *INDENT-OFF* */
1003  vec_foreach (p, nm->pref64)
1004  {
1005  if (p->fib_index == fib_index)
1006  {
1007  prefix = p;
1008  break;
1009  }
1010 
1011  if (p->fib_index == 0)
1012  gp = p;
1013  };
1014  /* *INDENT-ON* */
1015 
1016  if (!prefix)
1017  prefix = gp;
1018 
1019  if (prefix)
1020  {
1021  clib_memcpy (ip6, &p->prefix, sizeof (ip6_address_t));
1022  switch (p->plen)
1023  {
1024  case 32:
1025  ip6->as_u32[1] = ip4->as_u32;
1026  break;
1027  case 40:
1028  ip6->as_u8[5] = ip4->as_u8[0];
1029  ip6->as_u8[6] = ip4->as_u8[1];
1030  ip6->as_u8[7] = ip4->as_u8[2];
1031  ip6->as_u8[9] = ip4->as_u8[3];
1032  break;
1033  case 48:
1034  ip6->as_u8[6] = ip4->as_u8[0];
1035  ip6->as_u8[7] = ip4->as_u8[1];
1036  ip6->as_u8[9] = ip4->as_u8[2];
1037  ip6->as_u8[10] = ip4->as_u8[3];
1038  break;
1039  case 56:
1040  ip6->as_u8[7] = ip4->as_u8[0];
1041  ip6->as_u8[9] = ip4->as_u8[1];
1042  ip6->as_u8[10] = ip4->as_u8[2];
1043  ip6->as_u8[11] = ip4->as_u8[3];
1044  break;
1045  case 64:
1046  ip6->as_u8[9] = ip4->as_u8[0];
1047  ip6->as_u8[10] = ip4->as_u8[1];
1048  ip6->as_u8[11] = ip4->as_u8[2];
1049  ip6->as_u8[12] = ip4->as_u8[3];
1050  break;
1051  case 96:
1052  ip6->as_u32[3] = ip4->as_u32;
1053  break;
1054  default:
1055  nat_log_notice ("invalid prefix length");
1056  break;
1057  }
1058  }
1059  else
1060  {
1061  clib_memcpy (ip6, well_known_prefix, sizeof (ip6_address_t));
1062  ip6->as_u32[3] = ip4->as_u32;
1063  }
1064 }
1065 
1066 void
1068 {
1069  nat64_main_t *nm = &nat64_main;
1070  nat64_prefix_t *p, *gp = 0;
1071  u8 plen = 0;
1072 
1073  /* *INDENT-OFF* */
1074  vec_foreach (p, nm->pref64)
1075  {
1076  if (p->fib_index == fib_index)
1077  {
1078  plen = p->plen;
1079  break;
1080  }
1081 
1082  if (p->vrf_id == 0)
1083  gp = p;
1084  };
1085  /* *INDENT-ON* */
1086 
1087  if (!plen)
1088  {
1089  if (gp)
1090  plen = gp->plen;
1091  else
1092  plen = 96;
1093  }
1094 
1095  switch (plen)
1096  {
1097  case 32:
1098  ip4->as_u32 = ip6->as_u32[1];
1099  break;
1100  case 40:
1101  ip4->as_u8[0] = ip6->as_u8[5];
1102  ip4->as_u8[1] = ip6->as_u8[6];
1103  ip4->as_u8[2] = ip6->as_u8[7];
1104  ip4->as_u8[3] = ip6->as_u8[9];
1105  break;
1106  case 48:
1107  ip4->as_u8[0] = ip6->as_u8[6];
1108  ip4->as_u8[1] = ip6->as_u8[7];
1109  ip4->as_u8[2] = ip6->as_u8[9];
1110  ip4->as_u8[3] = ip6->as_u8[10];
1111  break;
1112  case 56:
1113  ip4->as_u8[0] = ip6->as_u8[7];
1114  ip4->as_u8[1] = ip6->as_u8[9];
1115  ip4->as_u8[2] = ip6->as_u8[10];
1116  ip4->as_u8[3] = ip6->as_u8[11];
1117  break;
1118  case 64:
1119  ip4->as_u8[0] = ip6->as_u8[9];
1120  ip4->as_u8[1] = ip6->as_u8[10];
1121  ip4->as_u8[2] = ip6->as_u8[11];
1122  ip4->as_u8[3] = ip6->as_u8[12];
1123  break;
1124  case 96:
1125  ip4->as_u32 = ip6->as_u32[3];
1126  break;
1127  default:
1128  nat_log_notice ("invalid prefix length");
1129  break;
1130  }
1131 }
1132 
1133 /**
1134  * @brief Per worker process checking expire time for NAT64 sessions.
1135  */
1136 static uword
1138  vlib_frame_t * f)
1139 {
1140  nat64_main_t *nm = &nat64_main;
1141  u32 thread_index = vm->thread_index;
1142  nat64_db_t *db = &nm->db[thread_index];
1143  u32 now = (u32) vlib_time_now (vm);
1144 
1145  nad64_db_st_free_expired (db, now);
1146 
1147  return 0;
1148 }
1149 
1151 
1152 /* *INDENT-OFF* */
1153 VLIB_REGISTER_NODE (nat64_expire_worker_walk_node, static) = {
1154  .function = nat64_expire_worker_walk_fn,
1155  .type = VLIB_NODE_TYPE_INPUT,
1156  .state = VLIB_NODE_STATE_INTERRUPT,
1157  .name = "nat64-expire-worker-walk",
1158 };
1159 /* *INDENT-ON* */
1160 
1162 
1163 /**
1164  * @brief Centralized process to drive per worker expire walk.
1165  */
1166 static uword
1168  vlib_frame_t * f)
1169 {
1170  nat64_main_t *nm = &nat64_main;
1171  vlib_main_t **worker_vms = 0, *worker_vm;
1172  int i;
1173  uword event_type, *event_data = 0;
1174 
1175  nm->nat64_expire_walk_node_index = nat64_expire_walk_node.index;
1176 
1177  if (vec_len (vlib_mains) == 0)
1178  vec_add1 (worker_vms, vm);
1179  else
1180  {
1181  for (i = 0; i < vec_len (vlib_mains); i++)
1182  {
1183  worker_vm = vlib_mains[i];
1184  if (worker_vm)
1185  vec_add1 (worker_vms, worker_vm);
1186  }
1187  }
1188 
1189  while (1)
1190  {
1191  if (nm->total_enabled_count)
1192  {
1194  event_type = vlib_process_get_events (vm, &event_data);
1195  }
1196  else
1197  {
1199  event_type = vlib_process_get_events (vm, &event_data);
1200  }
1201 
1202  switch (event_type)
1203  {
1204  case ~0:
1205  break;
1207  break;
1208  default:
1209  nat_log_notice ("unknown event %u", event_type);
1210  break;
1211  }
1212 
1213  for (i = 0; i < vec_len (worker_vms); i++)
1214  {
1215  worker_vm = worker_vms[i];
1217  nat64_expire_worker_walk_node.index);
1218  }
1219  }
1220 
1221  return 0;
1222 }
1223 
1224 /* *INDENT-OFF* */
1225 VLIB_REGISTER_NODE (nat64_expire_walk_node, static) = {
1226  .function = nat64_expire_walk_fn,
1227  .type = VLIB_NODE_TYPE_PROCESS,
1228  .name = "nat64-expire-walk",
1229 };
1230 /* *INDENT-ON* */
1231 
1232 /*
1233  * fd.io coding-style-patch-verification: ON
1234  *
1235  * Local Variables:
1236  * eval: (c-set-style "gnu")
1237  * End:
1238  */
u32 nat64_get_icmp_timeout(void)
Get ICMP session timeout.
Definition: nat64.c:786
#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:752
ip4_add_del_interface_address_callback_t * add_del_interface_address_callbacks
Functions to call when interface address changes.
Definition: ip4.h:130
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:1067
#define SNAT_TCP_ESTABLISHED_TIMEOUT
Definition: nat.h:36
#define PREDICT_TRUE(x)
Definition: clib.h:108
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:53
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:403
u32 nat64_expire_walk_node_index
Definition: nat64.h:109
u32 index
Definition: node.h:288
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:313
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:227
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:439
u32 vlib_frame_queue_main_init(u32 node_index, u32 frame_queue_nelts)
Definition: threads.c:1720
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:273
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:182
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:251
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:465
nat_alloc_out_addr_and_port_function_t * alloc_addr_and_port
Definition: nat.h:461
int nat64_add_interface_address(u32 sw_if_index, int is_add)
NAT64 pool address from specific (DHCP addressed) interface.
Definition: nat64.c:362
#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:121
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:303
unsigned char u8
Definition: types.h:56
static int ip4_is_fragment(const ip4_header_t *i)
Definition: ip4_packet.h:212
#define nat_interface_is_outside(i)
Check if NAT interface is outside.
Definition: nat.h:646
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
memset(h->entries, 0, sizeof(h->entries[0])*entries)
#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
u32 sw_if_index
Definition: vxlan_gbp.api:39
ip4_address_t dst_address
Definition: ip4_packet.h:169
u32 total_enabled_count
Definition: nat64.h:107
int nat64_set_icmp_timeout(u32 timeout)
Set ICMP session timeout.
Definition: nat64.c:773
#define nat_log_err(...)
Definition: nat.h:685
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:112
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:867
snat_interface_t * interfaces
Interface pool.
Definition: nat64.h:71
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:960
void nat64_session_reset_timeout(nat64_db_st_entry_t *ste, vlib_main_t *vm)
Reset NAT64 session timeout.
Definition: nat64.c:828
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:502
long ctx[MAX_CONNS]
Definition: main.c:144
u32 nat64_get_udp_timeout(void)
Get UDP session timeout.
Definition: nat64.c:765
unsigned short u16
Definition: types.h:57
u16 protocol
Definition: nat.h:54
#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:107
#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:1167
#define nat_interface_is_inside(i)
Check if NAT interface is inside.
Definition: nat.h:640
#define TCP_FLAG_FIN
Definition: fa_node.h:12
#define nat_log_notice(...)
Definition: nat.h:689
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:1236
void nat64_compose_ip6(ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
Compose IPv4-embedded IPv6 addresses.
Definition: nat64.c:997
#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:37
u32 as_u32[4]
Definition: ip6_packet.h:50
u32 nat64_get_tcp_est_timeout(void)
Get TCP established timeout.
Definition: nat64.c:820
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:155
vlib_node_registration_t nat64_out2in_node
(constructor) VLIB_REGISTER_NODE (nat64_out2in_node)
Definition: nat64_out2in.c:529
void nat64_pool_addr_walk(nat64_pool_addr_walk_fn_t fn, void *ctx)
Walk NAT64 pool.
Definition: nat64.c:347
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:211
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:73
int nat64_add_del_prefix(ip6_address_t *prefix, u8 plen, u32 vrf_id, u8 is_add)
Add/delete NAT64 prefix.
Definition: nat64.c:934
u32 bib_buckets
config parameters
Definition: nat64.h:95
#define clib_memcpy(a, b, c)
Definition: string.h:75
ip4_address_t addr
Definition: nat.h:52
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:181
u32 num_workers
Definition: nat.h:434
u32 first_worker_index
Definition: nat.h:435
u32 fq_in2out_index
Worker handoff.
Definition: nat64.h:86
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:96
static void nat64_free_out_addr_and_port(struct nat64_db_s *db, ip4_address_t *addr, u16 port, u8 protocol)
Definition: nat64.c:531
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:1123
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:1137
ip4_address_t addr
Definition: nat.h:240
#define VNET_FEATURES(...)
Definition: feature.h:386
void nat64_prefix_walk(nat64_prefix_walk_fn_t fn, void *ctx)
Walk NAT64 prefixes.
Definition: nat64.c:982
static uword is_pow2(uword x)
Definition: clib.h:231
void nat64_interfaces_walk(nat64_interface_walk_fn_t fn, void *ctx)
Walk NAT64 interfaces.
Definition: nat64.c:487
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.
int nat64_set_tcp_timeouts(u32 trans, u32 est)
Set TCP session timeouts.
Definition: nat64.c:794
ip4_main_t * ip4_main
Definition: nat64.h:111
static vlib_node_registration_t nat64_expire_walk_node
(constructor) VLIB_REGISTER_NODE (nat64_expire_walk_node)
Definition: nat64.c:1161
static int ip4_is_first_fragment(const ip4_header_t *i)
Definition: ip4_packet.h:219
static u32 ip_proto_to_snat_proto(u8 ip_proto)
The NAT inline functions.
Definition: nat_inlines.h:26
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u32 * workers
Definition: nat.h:436
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:570
snat_protocol_t
Definition: nat.h:133
u32 error_node_index
Definition: nat64.h:92
typedef prefix
Definition: ip_types.api:40
#define SNAT_ICMP_TIMEOUT
Definition: nat.h:37
NAT64 DB.
static vlib_node_registration_t nat64_expire_worker_walk_node
(constructor) VLIB_REGISTER_NODE (nat64_expire_worker_walk_node)
Definition: nat64.c:1150
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:900
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:611
NAT plugin virtual fragmentation reassembly.
VNET_FEATURE_INIT(nat64_in2out, static)
#define SNAT_TCP_TRANSITORY_TIMEOUT
Definition: nat.h:35
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:623
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:313
u32 fib_index
Definition: nat.h:241
u32 nat64_get_tcp_trans_timeout(void)
Get TCP transitory timeout.
Definition: nat64.c:812
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:169
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:134