FD.io VPP  v19.01.2-3-gf61a1a8
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  clib_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  /* Init counters */
244  nm->total_bibs.name = "total-bibs";
245  nm->total_bibs.stat_segment_name = "/nat64/total-bibs";
248  nm->total_sessions.name = "total-sessions";
249  nm->total_sessions.stat_segment_name = "/nat64/total-sessions";
252 
253  return 0;
254 }
255 
256 static void nat64_free_out_addr_and_port (struct nat64_db_s *db,
257  ip4_address_t * addr, u16 port,
258  u8 protocol);
259 
260 void
261 nat64_set_hash (u32 bib_buckets, u32 bib_memory_size, u32 st_buckets,
262  u32 st_memory_size)
263 {
264  nat64_main_t *nm = &nat64_main;
265  nat64_db_t *db;
266 
267  nm->bib_buckets = bib_buckets;
268  nm->bib_memory_size = bib_memory_size;
269  nm->st_buckets = st_buckets;
270  nm->st_memory_size = st_memory_size;
271 
272  /* *INDENT-OFF* */
273  vec_foreach (db, nm->db)
274  {
275  if (nat64_db_init (db, bib_buckets, bib_memory_size, st_buckets,
276  st_memory_size, nat64_free_out_addr_and_port))
277  nat_log_err ("NAT64 DB init failed");
278  }
279  /* *INDENT-ON* */
280 }
281 
282 int
283 nat64_add_del_pool_addr (ip4_address_t * addr, u32 vrf_id, u8 is_add)
284 {
285  nat64_main_t *nm = &nat64_main;
286  snat_address_t *a = 0;
287  snat_interface_t *interface;
288  int i;
289  nat64_db_t *db;
291 
292  /* Check if address already exists */
293  for (i = 0; i < vec_len (nm->addr_pool); i++)
294  {
295  if (nm->addr_pool[i].addr.as_u32 == addr->as_u32)
296  {
297  a = nm->addr_pool + i;
298  break;
299  }
300  }
301 
302  if (is_add)
303  {
304  if (a)
305  return VNET_API_ERROR_VALUE_EXIST;
306 
307  vec_add2 (nm->addr_pool, a, 1);
308  a->addr = *addr;
309  a->fib_index = ~0;
310  if (vrf_id != ~0)
311  a->fib_index =
314 #define _(N, id, n, s) \
315  clib_bitmap_alloc (a->busy_##n##_port_bitmap, 65535); \
316  a->busy_##n##_ports = 0; \
317  vec_validate_init_empty (a->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
319 #undef _
320  }
321  else
322  {
323  if (!a)
324  return VNET_API_ERROR_NO_SUCH_ENTRY;
325 
326  if (a->fib_index != ~0)
329  /* Delete sessions using address */
330  /* *INDENT-OFF* */
331  vec_foreach (db, nm->db)
332  {
333  nat64_db_free_out_addr (db, &a->addr);
334  vlib_set_simple_counter (&nm->total_bibs, db - nm->db, 0,
335  db->bib.bib_entries_num);
336  vlib_set_simple_counter (&nm->total_sessions, db - nm->db, 0,
337  db->st.st_entries_num);
338  }
339 #define _(N, id, n, s) \
340  clib_bitmap_free (a->busy_##n##_port_bitmap);
342 #undef _
343  /* *INDENT-ON* */
344  vec_del1 (nm->addr_pool, i);
345  }
346 
347  /* Add/del external address to FIB */
348  /* *INDENT-OFF* */
349  pool_foreach (interface, nm->interfaces,
350  ({
351  if (nat_interface_is_inside(interface))
352  continue;
353 
354  snat_add_del_addr_to_fib (addr, 32, interface->sw_if_index, is_add);
355  break;
356  }));
357  /* *INDENT-ON* */
358 
359  return 0;
360 }
361 
362 void
364 {
365  nat64_main_t *nm = &nat64_main;
366  snat_address_t *a = 0;
367 
368  /* *INDENT-OFF* */
369  vec_foreach (a, nm->addr_pool)
370  {
371  if (fn (a, ctx))
372  break;
373  };
374  /* *INDENT-ON* */
375 }
376 
377 int
379 {
380  nat64_main_t *nm = &nat64_main;
382  ip4_address_t *first_int_addr;
383  int i;
384 
385  first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0);
386 
387  for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
388  {
389  if (nm->auto_add_sw_if_indices[i] == sw_if_index)
390  {
391  if (is_add)
392  return VNET_API_ERROR_VALUE_EXIST;
393  else
394  {
395  /* if have address remove it */
396  if (first_int_addr)
397  (void) nat64_add_del_pool_addr (first_int_addr, ~0, 0);
398 
400  return 0;
401  }
402  }
403  }
404 
405  if (!is_add)
406  return VNET_API_ERROR_NO_SUCH_ENTRY;
407 
408  /* add to the auto-address list */
409  vec_add1 (nm->auto_add_sw_if_indices, sw_if_index);
410 
411  /* If the address is already bound - or static - add it now */
412  if (first_int_addr)
413  (void) nat64_add_del_pool_addr (first_int_addr, ~0, 1);
414 
415  return 0;
416 }
417 
418 int
420 {
421  nat64_main_t *nm = &nat64_main;
422  snat_interface_t *interface = 0, *i;
423  snat_address_t *ap;
424  const char *feature_name, *arc_name;
425 
426  /* Check if interface already exists */
427  /* *INDENT-OFF* */
428  pool_foreach (i, nm->interfaces,
429  ({
430  if (i->sw_if_index == sw_if_index)
431  {
432  interface = i;
433  break;
434  }
435  }));
436  /* *INDENT-ON* */
437 
438  if (is_add)
439  {
440  if (interface)
441  goto set_flags;
442 
443  pool_get (nm->interfaces, interface);
444  interface->sw_if_index = sw_if_index;
445  interface->flags = 0;
446  set_flags:
447  if (is_inside)
448  interface->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
449  else
450  interface->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
451 
452  nm->total_enabled_count++;
453  vlib_process_signal_event (nm->sm->vlib_main,
454  nm->nat64_expire_walk_node_index,
456 
457  }
458  else
459  {
460  if (!interface)
461  return VNET_API_ERROR_NO_SUCH_ENTRY;
462 
463  if ((nat_interface_is_inside (interface)
464  && nat_interface_is_outside (interface)))
465  interface->flags &=
466  is_inside ? ~NAT_INTERFACE_FLAG_IS_INSIDE :
468  else
469  pool_put (nm->interfaces, interface);
470 
471  nm->total_enabled_count--;
472  }
473 
474  if (!is_inside)
475  {
476  /* *INDENT-OFF* */
477  vec_foreach (ap, nm->addr_pool)
478  snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, is_add);
479  /* *INDENT-ON* */
480  }
481 
482  if (nm->sm->num_workers > 1)
483  {
484  feature_name =
485  is_inside ? "nat64-in2out-handoff" : "nat64-out2in-handoff";
486  if (nm->fq_in2out_index == ~0)
487  nm->fq_in2out_index =
489  if (nm->fq_out2in_index == ~0)
490  nm->fq_out2in_index =
492  }
493  else
494  feature_name = is_inside ? "nat64-in2out" : "nat64-out2in";
495 
496  arc_name = is_inside ? "ip6-unicast" : "ip4-unicast";
497 
498  return vnet_feature_enable_disable (arc_name, feature_name, sw_if_index,
499  is_add, 0, 0);
500 }
501 
502 void
504 {
505  nat64_main_t *nm = &nat64_main;
506  snat_interface_t *i = 0;
507 
508  /* *INDENT-OFF* */
509  pool_foreach (i, nm->interfaces,
510  ({
511  if (fn (i, ctx))
512  break;
513  }));
514  /* *INDENT-ON* */
515 }
516 
517 int
519  ip4_address_t * addr, u16 * port,
520  u32 thread_index)
521 {
522  nat64_main_t *nm = &nat64_main;
523  snat_main_t *sm = nm->sm;
525  u32 worker_index = 0;
526  int rv;
527 
528  k.protocol = proto;
529 
530  if (sm->num_workers > 1)
531  worker_index = thread_index - sm->first_worker_index;
532 
533  rv =
534  sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k,
535  sm->port_per_thread, worker_index);
536 
537  if (!rv)
538  {
539  *port = k.port;
540  addr->as_u32 = k.addr.as_u32;
541  }
542 
543  return rv;
544 }
545 
546 static void
548  u16 port, u8 protocol)
549 {
550  nat64_main_t *nm = &nat64_main;
551  int i;
552  snat_address_t *a;
553  u32 thread_index = db - nm->db;
554  snat_protocol_t proto = ip_proto_to_snat_proto (protocol);
555  u16 port_host_byte_order = clib_net_to_host_u16 (port);
556 
557  for (i = 0; i < vec_len (nm->addr_pool); i++)
558  {
559  a = nm->addr_pool + i;
560  if (addr->as_u32 != a->addr.as_u32)
561  continue;
562  switch (proto)
563  {
564 #define _(N, j, n, s) \
565  case SNAT_PROTOCOL_##N: \
566  ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
567  port_host_byte_order) == 1); \
568  clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, port, 0); \
569  a->busy_##n##_ports--; \
570  a->busy_##n##_ports_per_thread[thread_index]--; \
571  break;
573 #undef _
574  default:
575  nat_log_notice ("unknown protocol");
576  return;
577  }
578  break;
579  }
580 }
581 
582 /**
583  * @brief Add/delete static BIB entry in worker thread.
584  */
585 static uword
587  vlib_frame_t * f)
588 {
589  nat64_main_t *nm = &nat64_main;
590  u32 thread_index = vm->thread_index;
591  nat64_db_t *db = &nm->db[thread_index];
592  nat64_static_bib_to_update_t *static_bib;
593  nat64_db_bib_entry_t *bibe;
594  ip46_address_t addr;
595 
596  /* *INDENT-OFF* */
597  pool_foreach (static_bib, nm->static_bibs,
598  ({
599  if ((static_bib->thread_index != thread_index) || (static_bib->done))
600  continue;
601 
602  if (static_bib->is_add)
603  {
604  (void) nat64_db_bib_entry_create (db, &static_bib->in_addr,
605  &static_bib->out_addr,
606  static_bib->in_port,
607  static_bib->out_port,
608  static_bib->fib_index,
609  static_bib->proto, 1);
610  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
611  db->bib.bib_entries_num);
612  }
613  else
614  {
615  addr.as_u64[0] = static_bib->in_addr.as_u64[0];
616  addr.as_u64[1] = static_bib->in_addr.as_u64[1];
617  bibe = nat64_db_bib_entry_find (db, &addr, static_bib->in_port,
618  static_bib->proto,
619  static_bib->fib_index, 1);
620  if (bibe)
621  {
622  nat64_db_bib_entry_free (db, bibe);
623  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
624  db->bib.bib_entries_num);
625  vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
626  db->st.st_entries_num);
627  }
628  }
629 
630  static_bib->done = 1;
631  }));
632  /* *INDENT-ON* */
633 
634  return 0;
635 }
636 
638 
639 /* *INDENT-OFF* */
640 VLIB_REGISTER_NODE (nat64_static_bib_worker_node, static) = {
641  .function = nat64_static_bib_worker_fn,
642  .type = VLIB_NODE_TYPE_INPUT,
643  .state = VLIB_NODE_STATE_INTERRUPT,
644  .name = "nat64-static-bib-worker",
645 };
646 /* *INDENT-ON* */
647 
648 int
650  ip4_address_t * out_addr, u16 in_port,
651  u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
652 {
653  nat64_main_t *nm = &nat64_main;
654  nat64_db_bib_entry_t *bibe;
658  ip46_address_t addr;
659  int i;
660  snat_address_t *a;
661  u32 thread_index = 0;
662  nat64_db_t *db;
663  nat64_static_bib_to_update_t *static_bib;
664  vlib_main_t *worker_vm;
665  u32 *to_be_free = 0, *index;
666 
667  if (nm->sm->num_workers > 1)
668  {
669  thread_index = nat64_get_worker_in2out (in_addr);
670  db = &nm->db[thread_index];
671  }
672  else
673  db = &nm->db[nm->sm->num_workers];
674 
675  addr.as_u64[0] = in_addr->as_u64[0];
676  addr.as_u64[1] = in_addr->as_u64[1];
677  bibe =
678  nat64_db_bib_entry_find (db, &addr, clib_host_to_net_u16 (in_port),
679  proto, fib_index, 1);
680 
681  if (is_add)
682  {
683  if (bibe)
684  return VNET_API_ERROR_VALUE_EXIST;
685 
686  /* outside port must be assigned to same thread as internall address */
687  if ((out_port > 1024) && (nm->sm->num_workers > 1))
688  {
689  if (thread_index != ((out_port - 1024) / nm->sm->port_per_thread))
690  return VNET_API_ERROR_INVALID_VALUE_2;
691  }
692 
693  for (i = 0; i < vec_len (nm->addr_pool); i++)
694  {
695  a = nm->addr_pool + i;
696  if (out_addr->as_u32 != a->addr.as_u32)
697  continue;
698  switch (p)
699  {
700 #define _(N, j, n, s) \
701  case SNAT_PROTOCOL_##N: \
702  if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
703  out_port)) \
704  return VNET_API_ERROR_INVALID_VALUE; \
705  clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
706  out_port, 1); \
707  if (out_port > 1024) \
708  { \
709  a->busy_##n##_ports++; \
710  a->busy_##n##_ports_per_thread[thread_index]++; \
711  } \
712  break;
714 #undef _
715  default:
716  clib_memset (&addr, 0, sizeof (addr));
717  addr.ip4.as_u32 = out_addr->as_u32;
718  if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
719  return VNET_API_ERROR_INVALID_VALUE;
720  }
721  break;
722  }
723  if (!nm->sm->num_workers)
724  {
725  bibe =
726  nat64_db_bib_entry_create (db, in_addr, out_addr,
727  clib_host_to_net_u16 (in_port),
728  clib_host_to_net_u16 (out_port),
729  fib_index, proto, 1);
730  if (!bibe)
731  return VNET_API_ERROR_UNSPECIFIED;
732 
733  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
734  db->bib.bib_entries_num);
735  }
736  }
737  else
738  {
739  if (!bibe)
740  return VNET_API_ERROR_NO_SUCH_ENTRY;
741 
742  if (!nm->sm->num_workers)
743  {
744  nat64_db_bib_entry_free (db, bibe);
745  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
746  db->bib.bib_entries_num);
747  }
748  }
749 
750  if (nm->sm->num_workers)
751  {
752  /* *INDENT-OFF* */
753  pool_foreach (static_bib, nm->static_bibs,
754  ({
755  if (static_bib->done)
756  vec_add1 (to_be_free, static_bib - nm->static_bibs);
757  }));
758  vec_foreach (index, to_be_free)
759  pool_put_index (nm->static_bibs, index[0]);
760  /* *INDENT-ON* */
761  vec_free (to_be_free);
762  pool_get (nm->static_bibs, static_bib);
763  static_bib->in_addr.as_u64[0] = in_addr->as_u64[0];
764  static_bib->in_addr.as_u64[1] = in_addr->as_u64[1];
765  static_bib->in_port = clib_host_to_net_u16 (in_port);
766  static_bib->out_addr.as_u32 = out_addr->as_u32;
767  static_bib->out_port = clib_host_to_net_u16 (out_port);
768  static_bib->fib_index = fib_index;
769  static_bib->proto = proto;
770  static_bib->is_add = is_add;
771  static_bib->thread_index = thread_index;
772  static_bib->done = 0;
773  worker_vm = vlib_mains[thread_index];
774  if (worker_vm)
776  nat64_static_bib_worker_node.index);
777  else
778  return VNET_API_ERROR_UNSPECIFIED;
779  }
780 
781  return 0;
782 }
783 
784 int
786 {
787  nat64_main_t *nm = &nat64_main;
788 
789  if (timeout == 0)
791  else
792  nm->udp_timeout = timeout;
793 
794  return 0;
795 }
796 
797 u32
799 {
800  nat64_main_t *nm = &nat64_main;
801 
802  return nm->udp_timeout;
803 }
804 
805 int
807 {
808  nat64_main_t *nm = &nat64_main;
809 
810  if (timeout == 0)
812  else
813  nm->icmp_timeout = timeout;
814 
815  return 0;
816 }
817 
818 u32
820 {
821  nat64_main_t *nm = &nat64_main;
822 
823  return nm->icmp_timeout;
824 }
825 
826 int
828 {
829  nat64_main_t *nm = &nat64_main;
830 
831  if (trans == 0)
833  else
834  nm->tcp_trans_timeout = trans;
835 
836  if (est == 0)
838  else
839  nm->tcp_est_timeout = est;
840 
841  return 0;
842 }
843 
844 u32
846 {
847  nat64_main_t *nm = &nat64_main;
848 
849  return nm->tcp_trans_timeout;
850 }
851 
852 u32
854 {
855  nat64_main_t *nm = &nat64_main;
856 
857  return nm->tcp_est_timeout;
858 }
859 
860 void
861 nat64_session_reset_timeout (nat64_db_st_entry_t * ste, vlib_main_t * vm)
862 {
863  nat64_main_t *nm = &nat64_main;
864  u32 now = (u32) vlib_time_now (vm);
865 
866  switch (ip_proto_to_snat_proto (ste->proto))
867  {
868  case SNAT_PROTOCOL_ICMP:
869  ste->expire = now + nm->icmp_timeout;
870  return;
871  case SNAT_PROTOCOL_TCP:
872  {
873  switch (ste->tcp_state)
874  {
875  case NAT64_TCP_STATE_V4_INIT:
876  case NAT64_TCP_STATE_V6_INIT:
877  case NAT64_TCP_STATE_V4_FIN_RCV:
878  case NAT64_TCP_STATE_V6_FIN_RCV:
879  case NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV:
880  case NAT64_TCP_STATE_TRANS:
881  ste->expire = now + nm->tcp_trans_timeout;
882  return;
883  case NAT64_TCP_STATE_ESTABLISHED:
884  ste->expire = now + nm->tcp_est_timeout;
885  return;
886  default:
887  return;
888  }
889  }
890  case SNAT_PROTOCOL_UDP:
891  ste->expire = now + nm->udp_timeout;
892  return;
893  default:
894  ste->expire = now + nm->udp_timeout;
895  return;
896  }
897 }
898 
899 void
900 nat64_tcp_session_set_state (nat64_db_st_entry_t * ste, tcp_header_t * tcp,
901  u8 is_ip6)
902 {
903  switch (ste->tcp_state)
904  {
905  case NAT64_TCP_STATE_CLOSED:
906  {
907  if (tcp->flags & TCP_FLAG_SYN)
908  {
909  if (is_ip6)
910  ste->tcp_state = NAT64_TCP_STATE_V6_INIT;
911  else
912  ste->tcp_state = NAT64_TCP_STATE_V4_INIT;
913  }
914  return;
915  }
916  case NAT64_TCP_STATE_V4_INIT:
917  {
918  if (is_ip6 && (tcp->flags & TCP_FLAG_SYN))
919  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
920  return;
921  }
922  case NAT64_TCP_STATE_V6_INIT:
923  {
924  if (!is_ip6 && (tcp->flags & TCP_FLAG_SYN))
925  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
926  return;
927  }
928  case NAT64_TCP_STATE_ESTABLISHED:
929  {
930  if (tcp->flags & TCP_FLAG_FIN)
931  {
932  if (is_ip6)
933  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_RCV;
934  else
935  ste->tcp_state = NAT64_TCP_STATE_V4_FIN_RCV;
936  }
937  else if (tcp->flags & TCP_FLAG_RST)
938  {
939  ste->tcp_state = NAT64_TCP_STATE_TRANS;
940  }
941  return;
942  }
943  case NAT64_TCP_STATE_V4_FIN_RCV:
944  {
945  if (is_ip6 && (tcp->flags & TCP_FLAG_FIN))
946  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
947  return;
948  }
949  case NAT64_TCP_STATE_V6_FIN_RCV:
950  {
951  if (!is_ip6 && (tcp->flags & TCP_FLAG_FIN))
952  ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
953  return;
954  }
955  case NAT64_TCP_STATE_TRANS:
956  {
957  if (!(tcp->flags & TCP_FLAG_RST))
958  ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
959  return;
960  }
961  default:
962  return;
963  }
964 }
965 
966 int
968 {
969  nat64_main_t *nm = &nat64_main;
970  nat64_prefix_t *p = 0;
971  int i;
972 
973  /* Verify prefix length */
974  if (plen != 32 && plen != 40 && plen != 48 && plen != 56 && plen != 64
975  && plen != 96)
976  return VNET_API_ERROR_INVALID_VALUE;
977 
978  /* Check if tenant already have prefix */
979  for (i = 0; i < vec_len (nm->pref64); i++)
980  {
981  if (nm->pref64[i].vrf_id == vrf_id)
982  {
983  p = nm->pref64 + i;
984  break;
985  }
986  }
987 
988  if (is_add)
989  {
990  if (!p)
991  {
992  vec_add2 (nm->pref64, p, 1);
993  p->fib_index =
996  p->vrf_id = vrf_id;
997  }
998 
999  p->prefix.as_u64[0] = prefix->as_u64[0];
1000  p->prefix.as_u64[1] = prefix->as_u64[1];
1001  p->plen = plen;
1002  }
1003  else
1004  {
1005  if (!p)
1006  return VNET_API_ERROR_NO_SUCH_ENTRY;
1007 
1008  vec_del1 (nm->pref64, i);
1009  }
1010 
1011  return 0;
1012 }
1013 
1014 void
1016 {
1017  nat64_main_t *nm = &nat64_main;
1018  nat64_prefix_t *p = 0;
1019 
1020  /* *INDENT-OFF* */
1021  vec_foreach (p, nm->pref64)
1022  {
1023  if (fn (p, ctx))
1024  break;
1025  };
1026  /* *INDENT-ON* */
1027 }
1028 
1029 void
1031 {
1032  nat64_main_t *nm = &nat64_main;
1033  nat64_prefix_t *p, *gp = 0, *prefix = 0;
1034 
1035  /* *INDENT-OFF* */
1036  vec_foreach (p, nm->pref64)
1037  {
1038  if (p->fib_index == fib_index)
1039  {
1040  prefix = p;
1041  break;
1042  }
1043 
1044  if (p->fib_index == 0)
1045  gp = p;
1046  };
1047  /* *INDENT-ON* */
1048 
1049  if (!prefix)
1050  prefix = gp;
1051 
1052  if (prefix)
1053  {
1054  clib_memcpy_fast (ip6, &p->prefix, sizeof (ip6_address_t));
1055  switch (p->plen)
1056  {
1057  case 32:
1058  ip6->as_u32[1] = ip4->as_u32;
1059  break;
1060  case 40:
1061  ip6->as_u8[5] = ip4->as_u8[0];
1062  ip6->as_u8[6] = ip4->as_u8[1];
1063  ip6->as_u8[7] = ip4->as_u8[2];
1064  ip6->as_u8[9] = ip4->as_u8[3];
1065  break;
1066  case 48:
1067  ip6->as_u8[6] = ip4->as_u8[0];
1068  ip6->as_u8[7] = ip4->as_u8[1];
1069  ip6->as_u8[9] = ip4->as_u8[2];
1070  ip6->as_u8[10] = ip4->as_u8[3];
1071  break;
1072  case 56:
1073  ip6->as_u8[7] = ip4->as_u8[0];
1074  ip6->as_u8[9] = ip4->as_u8[1];
1075  ip6->as_u8[10] = ip4->as_u8[2];
1076  ip6->as_u8[11] = ip4->as_u8[3];
1077  break;
1078  case 64:
1079  ip6->as_u8[9] = ip4->as_u8[0];
1080  ip6->as_u8[10] = ip4->as_u8[1];
1081  ip6->as_u8[11] = ip4->as_u8[2];
1082  ip6->as_u8[12] = ip4->as_u8[3];
1083  break;
1084  case 96:
1085  ip6->as_u32[3] = ip4->as_u32;
1086  break;
1087  default:
1088  nat_log_notice ("invalid prefix length");
1089  break;
1090  }
1091  }
1092  else
1093  {
1095  ip6->as_u32[3] = ip4->as_u32;
1096  }
1097 }
1098 
1099 void
1101 {
1102  nat64_main_t *nm = &nat64_main;
1103  nat64_prefix_t *p, *gp = 0;
1104  u8 plen = 0;
1105 
1106  /* *INDENT-OFF* */
1107  vec_foreach (p, nm->pref64)
1108  {
1109  if (p->fib_index == fib_index)
1110  {
1111  plen = p->plen;
1112  break;
1113  }
1114 
1115  if (p->vrf_id == 0)
1116  gp = p;
1117  };
1118  /* *INDENT-ON* */
1119 
1120  if (!plen)
1121  {
1122  if (gp)
1123  plen = gp->plen;
1124  else
1125  plen = 96;
1126  }
1127 
1128  switch (plen)
1129  {
1130  case 32:
1131  ip4->as_u32 = ip6->as_u32[1];
1132  break;
1133  case 40:
1134  ip4->as_u8[0] = ip6->as_u8[5];
1135  ip4->as_u8[1] = ip6->as_u8[6];
1136  ip4->as_u8[2] = ip6->as_u8[7];
1137  ip4->as_u8[3] = ip6->as_u8[9];
1138  break;
1139  case 48:
1140  ip4->as_u8[0] = ip6->as_u8[6];
1141  ip4->as_u8[1] = ip6->as_u8[7];
1142  ip4->as_u8[2] = ip6->as_u8[9];
1143  ip4->as_u8[3] = ip6->as_u8[10];
1144  break;
1145  case 56:
1146  ip4->as_u8[0] = ip6->as_u8[7];
1147  ip4->as_u8[1] = ip6->as_u8[9];
1148  ip4->as_u8[2] = ip6->as_u8[10];
1149  ip4->as_u8[3] = ip6->as_u8[11];
1150  break;
1151  case 64:
1152  ip4->as_u8[0] = ip6->as_u8[9];
1153  ip4->as_u8[1] = ip6->as_u8[10];
1154  ip4->as_u8[2] = ip6->as_u8[11];
1155  ip4->as_u8[3] = ip6->as_u8[12];
1156  break;
1157  case 96:
1158  ip4->as_u32 = ip6->as_u32[3];
1159  break;
1160  default:
1161  nat_log_notice ("invalid prefix length");
1162  break;
1163  }
1164 }
1165 
1166 /**
1167  * @brief Per worker process checking expire time for NAT64 sessions.
1168  */
1169 static uword
1171  vlib_frame_t * f)
1172 {
1173  nat64_main_t *nm = &nat64_main;
1174  u32 thread_index = vm->thread_index;
1175  nat64_db_t *db = &nm->db[thread_index];
1176  u32 now = (u32) vlib_time_now (vm);
1177 
1178  nad64_db_st_free_expired (db, now);
1179  vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
1180  db->bib.bib_entries_num);
1181  vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
1182  db->st.st_entries_num);
1183 
1184  return 0;
1185 }
1186 
1188 
1189 /* *INDENT-OFF* */
1190 VLIB_REGISTER_NODE (nat64_expire_worker_walk_node, static) = {
1191  .function = nat64_expire_worker_walk_fn,
1192  .type = VLIB_NODE_TYPE_INPUT,
1193  .state = VLIB_NODE_STATE_INTERRUPT,
1194  .name = "nat64-expire-worker-walk",
1195 };
1196 /* *INDENT-ON* */
1197 
1199 
1200 /**
1201  * @brief Centralized process to drive per worker expire walk.
1202  */
1203 static uword
1205  vlib_frame_t * f)
1206 {
1207  nat64_main_t *nm = &nat64_main;
1208  vlib_main_t **worker_vms = 0, *worker_vm;
1209  int i;
1210  uword event_type, *event_data = 0;
1211 
1212  nm->nat64_expire_walk_node_index = nat64_expire_walk_node.index;
1213 
1214  if (vec_len (vlib_mains) == 0)
1215  vec_add1 (worker_vms, vm);
1216  else
1217  {
1218  for (i = 0; i < vec_len (vlib_mains); i++)
1219  {
1220  worker_vm = vlib_mains[i];
1221  if (worker_vm)
1222  vec_add1 (worker_vms, worker_vm);
1223  }
1224  }
1225 
1226  while (1)
1227  {
1228  if (nm->total_enabled_count)
1229  {
1231  event_type = vlib_process_get_events (vm, &event_data);
1232  }
1233  else
1234  {
1236  event_type = vlib_process_get_events (vm, &event_data);
1237  }
1238 
1239  switch (event_type)
1240  {
1241  case ~0:
1242  break;
1244  break;
1245  default:
1246  nat_log_notice ("unknown event %u", event_type);
1247  break;
1248  }
1249 
1250  for (i = 0; i < vec_len (worker_vms); i++)
1251  {
1252  worker_vm = worker_vms[i];
1254  nat64_expire_worker_walk_node.index);
1255  }
1256  }
1257 
1258  return 0;
1259 }
1260 
1261 /* *INDENT-OFF* */
1262 VLIB_REGISTER_NODE (nat64_expire_walk_node, static) = {
1263  .function = nat64_expire_walk_fn,
1264  .type = VLIB_NODE_TYPE_PROCESS,
1265  .name = "nat64-expire-walk",
1266 };
1267 /* *INDENT-ON* */
1268 
1269 /*
1270  * fd.io coding-style-patch-verification: ON
1271  *
1272  * Local Variables:
1273  * eval: (c-set-style "gnu")
1274  * End:
1275  */
u32 nat64_get_icmp_timeout(void)
Get ICMP session timeout.
Definition: nat64.c:819
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
nat64_db_t * db
BIB and session DB per thread.
Definition: nat64.h:83
typedef address
Definition: ip_types.api:30
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:26
int nat64_set_udp_timeout(u32 timeout)
Set UDP session timeout.
Definition: nat64.c:785
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:703
a
Definition: bitmap.h:538
static uword * vlib_process_wait_for_event(vlib_main_t *vm)
Definition: node_funcs.h:623
ip4_address_t src_address
Definition: ip4_packet.h:170
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:1100
#define SNAT_TCP_ESTABLISHED_TIMEOUT
Definition: nat.h:36
#define PREDICT_TRUE(x)
Definition: clib.h:112
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: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:419
u32 nat64_expire_walk_node_index
Definition: nat64.h:109
u32 index
Definition: node.h:304
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:232
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:53
u16 port_per_thread
Definition: nat.h:442
u32 vlib_frame_queue_main_init(u32 node_index, u32 frame_queue_nelts)
Definition: threads.c:1741
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:283
u32 thread_index
Definition: main.h:179
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:525
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:206
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:564
#define NAT_INTERFACE_FLAG_IS_OUTSIDE
Definition: nat.h:182
int i
clib_memset(h->entries, 0, sizeof(h->entries[0])*entries)
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:261
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:488
nat_alloc_out_addr_and_port_function_t * alloc_addr_and_port
Definition: nat.h:464
int nat64_add_interface_address(u32 sw_if_index, int is_add)
NAT64 pool address from specific (DHCP addressed) interface.
Definition: nat64.c:378
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:236
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:310
unsigned char u8
Definition: types.h:56
u32 st_entries_num
Definition: nat64_db.h:123
static int ip4_is_fragment(const ip4_header_t *i)
Definition: ip4_packet.h:213
#define nat_interface_is_outside(i)
Check if NAT interface is outside.
Definition: nat.h:653
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:490
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:546
u32 sw_if_index
Definition: vxlan_gbp.api:37
ip4_address_t dst_address
Definition: ip4_packet.h:170
u32 total_enabled_count
Definition: nat64.h:107
int nat64_set_icmp_timeout(u32 timeout)
Set ICMP session timeout.
Definition: nat64.c:806
#define nat_log_err(...)
Definition: nat.h:692
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:241
snat_main_t * sm
Definition: nat64.h:116
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:900
snat_interface_t * interfaces
Interface pool.
Definition: nat64.h:71
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: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:964
void nat64_session_reset_timeout(nat64_db_st_entry_t *ste, vlib_main_t *vm)
Reset NAT64 session timeout.
Definition: nat64.c:861
void nad64_db_st_free_expired(nat64_db_t *db, u32 now)
Free expired session entries in session tables.
Definition: nat64_db.c:644
u8 address_length
Definition: ip_types.api:37
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:518
long ctx[MAX_CONNS]
Definition: main.c:144
u32 nat64_get_udp_timeout(void)
Get UDP session timeout.
Definition: nat64.c:798
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:286
void nat64_db_bib_entry_free(nat64_db_t *db, nat64_db_bib_entry_t *bibe)
Free NAT64 BIB entry.
Definition: nat64_db.c:128
nat64_db_st_t st
Definition: nat64_db.h:139
#define PREDICT_FALSE(x)
Definition: clib.h:111
#define vec_del1(v, i)
Delete the element at index I.
Definition: vec.h:808
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:1204
#define nat_interface_is_inside(i)
Check if NAT interface is inside.
Definition: nat.h:647
#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
#define nat_log_notice(...)
Definition: nat.h:696
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:1237
void nat64_compose_ip6(ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
Compose IPv4-embedded IPv6 addresses.
Definition: nat64.c:1030
#define TCP_FLAG_RST
Definition: fa_node.h:14
vlib_simple_counter_main_t total_sessions
Definition: nat64.h:113
static u8 well_known_prefix[]
Definition: nat64.c:55
snat_main_t snat_main
Definition: nat.c:38
u32 as_u32[4]
Definition: ip6_packet.h:50
u32 nat64_get_tcp_est_timeout(void)
Get TCP established timeout.
Definition: nat64.c:853
#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:576
void nat64_pool_addr_walk(nat64_pool_addr_walk_fn_t fn, void *ctx)
Walk NAT64 pool.
Definition: nat64.c:363
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:212
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:301
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
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:967
u32 bib_buckets
config parameters
Definition: nat64.h:95
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
void vlib_validate_simple_counter(vlib_simple_counter_main_t *cm, u32 index)
validate a simple counter
Definition: counter.c:91
#define pool_put_index(p, i)
Free pool element with given index.
Definition: pool.h:311
#define NAT_INTERFACE_FLAG_IS_INSIDE
Definition: nat.h:181
u32 num_workers
Definition: nat.h:437
u32 first_worker_index
Definition: nat.h:438
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:547
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 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:1170
u32 bib_entries_num
Definition: nat64_db.h:73
ip4_address_t addr
Definition: nat.h:243
#define VNET_FEATURES(...)
Definition: feature.h:435
void nat64_prefix_walk(nat64_prefix_walk_fn_t fn, void *ctx)
Walk NAT64 prefixes.
Definition: nat64.c:1015
static uword is_pow2(uword x)
Definition: clib.h:235
void nat64_interfaces_walk(nat64_interface_walk_fn_t fn, void *ctx)
Walk NAT64 interfaces.
Definition: nat64.c:503
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:676
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:827
ip4_main_t * ip4_main
Definition: nat64.h:115
static vlib_node_registration_t nat64_expire_walk_node
(constructor) VLIB_REGISTER_NODE (nat64_expire_walk_node)
Definition: nat64.c:1198
char * stat_segment_name
Name in stat segment directory.
Definition: counter.h:65
static int ip4_is_first_fragment(const ip4_header_t *i)
Definition: ip4_packet.h:220
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:439
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:586
snat_protocol_t
Definition: nat.h:133
u32 error_node_index
Definition: nat64.h:92
typedef prefix
Definition: ip_types.api:35
#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:1187
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:903
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:637
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:649
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:317
u32 fib_index
Definition: nat.h:244
u32 nat64_get_tcp_trans_timeout(void)
Get TCP transitory timeout.
Definition: nat64.c:845
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:173
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:274
vlib_simple_counter_main_t total_bibs
Definition: nat64.h:112
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:138