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Vector Packet Processing
nat64_db.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 DB
18  */
19 #include <nat/nat64_db.h>
20 #include <nat/nat_ipfix_logging.h>
21 #include <nat/nat_inlines.h>
22 #include <nat/nat_syslog.h>
23 #include <vnet/fib/fib_table.h>
24 
25 int
26 nat64_db_init (nat64_db_t * db, u32 bib_buckets, u32 bib_memory_size,
27  u32 st_buckets, u32 st_memory_size,
28  nat64_db_free_addr_port_function_t free_addr_port_cb)
29 {
30  clib_bihash_init_24_8 (&db->bib.in2out, "bib-in2out", bib_buckets,
31  bib_memory_size);
32 
33  clib_bihash_init_24_8 (&db->bib.out2in, "bib-out2in", bib_buckets,
34  bib_memory_size);
35 
36  clib_bihash_init_48_8 (&db->st.in2out, "st-in2out", st_buckets,
37  st_memory_size);
38 
39  clib_bihash_init_48_8 (&db->st.out2in, "st-out2in", st_buckets,
40  st_memory_size);
41 
42  db->free_addr_port_cb = free_addr_port_cb;
43  db->bib.limit = 10 * bib_buckets;
44  db->bib.bib_entries_num = 0;
45  db->st.limit = 10 * st_buckets;
46  db->st.st_entries_num = 0;
47  db->addr_free = 0;
48 
49  return 0;
50 }
51 
52 nat64_db_bib_entry_t *
54  ip6_address_t * in_addr,
55  ip4_address_t * out_addr, u16 in_port,
56  u16 out_port, u32 fib_index, u8 proto,
57  u8 is_static)
58 {
59  nat64_db_bib_entry_t *bibe;
60  nat64_db_bib_entry_key_t bibe_key;
62  fib_table_t *fib;
63 
64  if (db->bib.bib_entries_num >= db->bib.limit)
65  {
66  db->free_addr_port_cb (db, out_addr, out_port, proto);
67  nat_ipfix_logging_max_bibs (thread_index, db->bib.limit);
68  return 0;
69  }
70 
71  /* create pool entry */
72  switch (ip_proto_to_snat_proto (proto))
73  {
74 /* *INDENT-OFF* */
75 #define _(N, i, n, s) \
76  case SNAT_PROTOCOL_##N: \
77  pool_get (db->bib._##n##_bib, bibe); \
78  kv.value = bibe - db->bib._##n##_bib; \
79  break;
81 #undef _
82 /* *INDENT-ON* */
83  default:
84  pool_get (db->bib._unk_proto_bib, bibe);
85  kv.value = bibe - db->bib._unk_proto_bib;
86  break;
87  }
88 
89  db->bib.bib_entries_num++;
90 
91  clib_memset (bibe, 0, sizeof (*bibe));
92  bibe->in_addr.as_u64[0] = in_addr->as_u64[0];
93  bibe->in_addr.as_u64[1] = in_addr->as_u64[1];
94  bibe->in_port = in_port;
95  bibe->out_addr.as_u32 = out_addr->as_u32;
96  bibe->out_port = out_port;
97  bibe->fib_index = fib_index;
98  bibe->proto = proto;
99  bibe->is_static = is_static;
100 
101  /* create hash lookup */
102  bibe_key.addr.as_u64[0] = bibe->in_addr.as_u64[0];
103  bibe_key.addr.as_u64[1] = bibe->in_addr.as_u64[1];
104  bibe_key.fib_index = bibe->fib_index;
105  bibe_key.port = bibe->in_port;
106  bibe_key.proto = bibe->proto;
107  bibe_key.rsvd = 0;
108  kv.key[0] = bibe_key.as_u64[0];
109  kv.key[1] = bibe_key.as_u64[1];
110  kv.key[2] = bibe_key.as_u64[2];
111  clib_bihash_add_del_24_8 (&db->bib.in2out, &kv, 1);
112 
113  clib_memset (&bibe_key.addr, 0, sizeof (bibe_key.addr));
114  bibe_key.addr.ip4.as_u32 = bibe->out_addr.as_u32;
115  bibe_key.fib_index = 0;
116  bibe_key.port = bibe->out_port;
117  kv.key[0] = bibe_key.as_u64[0];
118  kv.key[1] = bibe_key.as_u64[1];
119  kv.key[2] = bibe_key.as_u64[2];
120  clib_bihash_add_del_24_8 (&db->bib.out2in, &kv, 1);
121 
122  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
123  nat_ipfix_logging_nat64_bib (thread_index, in_addr, out_addr, proto,
124  in_port, out_port, fib->ft_table_id, 1);
125  return bibe;
126 }
127 
128 void
130  nat64_db_bib_entry_t * bibe)
131 {
132  nat64_db_bib_entry_key_t bibe_key;
134  nat64_db_bib_entry_t *bib;
135  u32 *ste_to_be_free = 0, *ste_index, bibe_index;
136  nat64_db_st_entry_t *st, *ste;
137  fib_table_t *fib;
138 
139  switch (ip_proto_to_snat_proto (bibe->proto))
140  {
141 /* *INDENT-OFF* */
142 #define _(N, i, n, s) \
143  case SNAT_PROTOCOL_##N: \
144  bib = db->bib._##n##_bib; \
145  st = db->st._##n##_st; \
146  break;
148 #undef _
149 /* *INDENT-ON* */
150  default:
151  bib = db->bib._unk_proto_bib;
152  st = db->st._unk_proto_st;
153  break;
154  }
155 
156  db->bib.bib_entries_num--;
157 
158  bibe_index = bibe - bib;
159 
160  /* delete ST entries for static BIB entry */
161  if (bibe->is_static)
162  {
163  pool_foreach (ste, st, (
164  {
165  if (ste->bibe_index == bibe_index)
166  vec_add1 (ste_to_be_free, ste - st);}
167  ));
168  vec_foreach (ste_index, ste_to_be_free)
169  nat64_db_st_entry_free (thread_index, db,
170  pool_elt_at_index (st, ste_index[0]));
171  vec_free (ste_to_be_free);
172  }
173 
174  /* delete hash lookup */
175  bibe_key.addr.as_u64[0] = bibe->in_addr.as_u64[0];
176  bibe_key.addr.as_u64[1] = bibe->in_addr.as_u64[1];
177  bibe_key.fib_index = bibe->fib_index;
178  bibe_key.port = bibe->in_port;
179  bibe_key.proto = bibe->proto;
180  bibe_key.rsvd = 0;
181  kv.key[0] = bibe_key.as_u64[0];
182  kv.key[1] = bibe_key.as_u64[1];
183  kv.key[2] = bibe_key.as_u64[2];
184  clib_bihash_add_del_24_8 (&db->bib.in2out, &kv, 0);
185 
186  clib_memset (&bibe_key.addr, 0, sizeof (bibe_key.addr));
187  bibe_key.addr.ip4.as_u32 = bibe->out_addr.as_u32;
188  bibe_key.fib_index = 0;
189  bibe_key.port = bibe->out_port;
190  kv.key[0] = bibe_key.as_u64[0];
191  kv.key[1] = bibe_key.as_u64[1];
192  kv.key[2] = bibe_key.as_u64[2];
193  clib_bihash_add_del_24_8 (&db->bib.out2in, &kv, 0);
194 
195  if (!db->addr_free)
196  db->free_addr_port_cb (db, &bibe->out_addr, bibe->out_port, bibe->proto);
197 
198  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
199  nat_ipfix_logging_nat64_bib (thread_index, &bibe->in_addr, &bibe->out_addr,
200  bibe->proto, bibe->in_port, bibe->out_port,
201  fib->ft_table_id, 0);
202 
203  /* delete from pool */
204  pool_put (bib, bibe);
205 
206 }
207 
208 nat64_db_bib_entry_t *
209 nat64_db_bib_entry_find (nat64_db_t * db, ip46_address_t * addr, u16 port,
210  u8 proto, u32 fib_index, u8 is_ip6)
211 {
212  nat64_db_bib_entry_t *bibe = 0;
213  nat64_db_bib_entry_key_t bibe_key;
214  clib_bihash_kv_24_8_t kv, value;
215  nat64_db_bib_entry_t *bib;
216 
217  switch (ip_proto_to_snat_proto (proto))
218  {
219 /* *INDENT-OFF* */
220 #define _(N, i, n, s) \
221  case SNAT_PROTOCOL_##N: \
222  bib = db->bib._##n##_bib; \
223  break;
225 #undef _
226 /* *INDENT-ON* */
227  default:
228  bib = db->bib._unk_proto_bib;
229  break;
230  }
231 
232  bibe_key.addr.as_u64[0] = addr->as_u64[0];
233  bibe_key.addr.as_u64[1] = addr->as_u64[1];
234  bibe_key.fib_index = fib_index;
235  bibe_key.port = port;
236  bibe_key.proto = proto;
237  bibe_key.rsvd = 0;
238 
239  kv.key[0] = bibe_key.as_u64[0];
240  kv.key[1] = bibe_key.as_u64[1];
241  kv.key[2] = bibe_key.as_u64[2];
242 
243  if (!clib_bihash_search_24_8
244  (is_ip6 ? &db->bib.in2out : &db->bib.out2in, &kv, &value))
245  bibe = pool_elt_at_index (bib, value.value);
246 
247  return bibe;
248 }
249 
250 void
252  nat64_db_bib_walk_fn_t fn, void *ctx)
253 {
254  nat64_db_bib_entry_t *bib, *bibe;
255 
256  if (proto == 255)
257  {
258  /* *INDENT-OFF* */
259  #define _(N, i, n, s) \
260  bib = db->bib._##n##_bib; \
261  pool_foreach (bibe, bib, ({ \
262  if (fn (bibe, ctx)) \
263  return; \
264  }));
266  #undef _
267  bib = db->bib._unk_proto_bib;
268  pool_foreach (bibe, bib, ({
269  if (fn (bibe, ctx))
270  return;
271  }));
272  /* *INDENT-ON* */
273  }
274  else
275  {
276  switch (ip_proto_to_snat_proto (proto))
277  {
278  /* *INDENT-OFF* */
279  #define _(N, i, n, s) \
280  case SNAT_PROTOCOL_##N: \
281  bib = db->bib._##n##_bib; \
282  break;
284  #undef _
285  /* *INDENT-ON* */
286  default:
287  bib = db->bib._unk_proto_bib;
288  break;
289  }
290 
291  /* *INDENT-OFF* */
292  pool_foreach (bibe, bib,
293  ({
294  if (fn (bibe, ctx))
295  return;
296  }));
297  /* *INDENT-ON* */
298  }
299 }
300 
301 nat64_db_bib_entry_t *
302 nat64_db_bib_entry_by_index (nat64_db_t * db, u8 proto, u32 bibe_index)
303 {
304  nat64_db_bib_entry_t *bib;
305 
306  switch (ip_proto_to_snat_proto (proto))
307  {
308 /* *INDENT-OFF* */
309 #define _(N, i, n, s) \
310  case SNAT_PROTOCOL_##N: \
311  bib = db->bib._##n##_bib; \
312  break;
314 #undef _
315 /* *INDENT-ON* */
316  default:
317  bib = db->bib._unk_proto_bib;
318  break;
319  }
320 
321  return pool_elt_at_index (bib, bibe_index);
322 }
323 
324 void
326  nat64_db_st_walk_fn_t fn, void *ctx)
327 {
328  nat64_db_st_entry_t *st, *ste;
329 
330  if (proto == 255)
331  {
332  /* *INDENT-OFF* */
333  #define _(N, i, n, s) \
334  st = db->st._##n##_st; \
335  pool_foreach (ste, st, ({ \
336  if (fn (ste, ctx)) \
337  return; \
338  }));
340  #undef _
341  st = db->st._unk_proto_st;
342  pool_foreach (ste, st, ({
343  if (fn (ste, ctx))
344  return;
345  }));
346  /* *INDENT-ON* */
347  }
348  else
349  {
350  switch (ip_proto_to_snat_proto (proto))
351  {
352  /* *INDENT-OFF* */
353  #define _(N, i, n, s) \
354  case SNAT_PROTOCOL_##N: \
355  st = db->st._##n##_st; \
356  break;
358  #undef _
359  /* *INDENT-ON* */
360  default:
361  st = db->st._unk_proto_st;
362  break;
363  }
364 
365  /* *INDENT-OFF* */
366  pool_foreach (ste, st,
367  ({
368  if (fn (ste, ctx))
369  return;
370  }));
371  /* *INDENT-ON* */
372  }
373 }
374 
375 nat64_db_st_entry_t *
377  nat64_db_bib_entry_t * bibe,
378  ip6_address_t * in_r_addr,
379  ip4_address_t * out_r_addr, u16 r_port)
380 {
381  nat64_db_st_entry_t *ste;
382  nat64_db_bib_entry_t *bib;
383  nat64_db_st_entry_key_t ste_key;
385  fib_table_t *fib;
386 
387  if (db->st.st_entries_num >= db->st.limit)
388  {
389  nat_ipfix_logging_max_sessions (thread_index, db->st.limit);
390  return 0;
391  }
392 
393  /* create pool entry */
394  switch (ip_proto_to_snat_proto (bibe->proto))
395  {
396 /* *INDENT-OFF* */
397 #define _(N, i, n, s) \
398  case SNAT_PROTOCOL_##N: \
399  pool_get (db->st._##n##_st, ste); \
400  kv.value = ste - db->st._##n##_st; \
401  bib = db->bib._##n##_bib; \
402  break;
404 #undef _
405 /* *INDENT-ON* */
406  default:
407  pool_get (db->st._unk_proto_st, ste);
408  kv.value = ste - db->st._unk_proto_st;
409  bib = db->bib._unk_proto_bib;
410  break;
411  }
412 
413  db->st.st_entries_num++;
414 
415  clib_memset (ste, 0, sizeof (*ste));
416  ste->in_r_addr.as_u64[0] = in_r_addr->as_u64[0];
417  ste->in_r_addr.as_u64[1] = in_r_addr->as_u64[1];
418  ste->out_r_addr.as_u32 = out_r_addr->as_u32;
419  ste->r_port = r_port;
420  ste->bibe_index = bibe - bib;
421  ste->proto = bibe->proto;
422 
423  /* increment session number for BIB entry */
424  bibe->ses_num++;
425 
426  /* create hash lookup */
427  clib_memset (&ste_key, 0, sizeof (ste_key));
428  ste_key.l_addr.as_u64[0] = bibe->in_addr.as_u64[0];
429  ste_key.l_addr.as_u64[1] = bibe->in_addr.as_u64[1];
430  ste_key.r_addr.as_u64[0] = ste->in_r_addr.as_u64[0];
431  ste_key.r_addr.as_u64[1] = ste->in_r_addr.as_u64[1];
432  ste_key.fib_index = bibe->fib_index;
433  ste_key.l_port = bibe->in_port;
434  ste_key.r_port = ste->r_port;
435  ste_key.proto = ste->proto;
436  kv.key[0] = ste_key.as_u64[0];
437  kv.key[1] = ste_key.as_u64[1];
438  kv.key[2] = ste_key.as_u64[2];
439  kv.key[3] = ste_key.as_u64[3];
440  kv.key[4] = ste_key.as_u64[4];
441  kv.key[5] = ste_key.as_u64[5];
442  clib_bihash_add_del_48_8 (&db->st.in2out, &kv, 1);
443 
444  clib_memset (&ste_key, 0, sizeof (ste_key));
445  ste_key.l_addr.ip4.as_u32 = bibe->out_addr.as_u32;
446  ste_key.r_addr.ip4.as_u32 = ste->out_r_addr.as_u32;
447  ste_key.l_port = bibe->out_port;
448  ste_key.r_port = ste->r_port;
449  ste_key.proto = ste->proto;
450  kv.key[0] = ste_key.as_u64[0];
451  kv.key[1] = ste_key.as_u64[1];
452  kv.key[2] = ste_key.as_u64[2];
453  kv.key[3] = ste_key.as_u64[3];
454  kv.key[4] = ste_key.as_u64[4];
455  kv.key[5] = ste_key.as_u64[5];
456  clib_bihash_add_del_48_8 (&db->st.out2in, &kv, 1);
457 
458  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
459  nat_ipfix_logging_nat64_session (thread_index, &bibe->in_addr,
460  &bibe->out_addr, bibe->proto,
461  bibe->in_port, bibe->out_port,
462  &ste->in_r_addr, &ste->out_r_addr,
463  ste->r_port, ste->r_port, fib->ft_table_id,
464  1);
465  nat_syslog_nat64_sadd (bibe->fib_index, &bibe->in_addr, bibe->in_port,
466  &bibe->out_addr, bibe->out_port, &ste->out_r_addr,
467  ste->r_port, bibe->proto);
468  return ste;
469 }
470 
471 void
473  nat64_db_t * db, nat64_db_st_entry_t * ste)
474 {
475  nat64_db_st_entry_t *st;
476  nat64_db_bib_entry_t *bib, *bibe;
477  nat64_db_st_entry_key_t ste_key;
479  fib_table_t *fib;
480 
481  switch (ip_proto_to_snat_proto (ste->proto))
482  {
483 /* *INDENT-OFF* */
484 #define _(N, i, n, s) \
485  case SNAT_PROTOCOL_##N: \
486  st = db->st._##n##_st; \
487  bib = db->bib._##n##_bib; \
488  break;
490 #undef _
491 /* *INDENT-ON* */
492  default:
493  st = db->st._unk_proto_st;
494  bib = db->bib._unk_proto_bib;
495  break;
496  }
497 
498  bibe = pool_elt_at_index (bib, ste->bibe_index);
499 
500  db->st.st_entries_num--;
501 
502  /* delete hash lookup */
503  clib_memset (&ste_key, 0, sizeof (ste_key));
504  ste_key.l_addr.as_u64[0] = bibe->in_addr.as_u64[0];
505  ste_key.l_addr.as_u64[1] = bibe->in_addr.as_u64[1];
506  ste_key.r_addr.as_u64[0] = ste->in_r_addr.as_u64[0];
507  ste_key.r_addr.as_u64[1] = ste->in_r_addr.as_u64[1];
508  ste_key.fib_index = bibe->fib_index;
509  ste_key.l_port = bibe->in_port;
510  ste_key.r_port = ste->r_port;
511  ste_key.proto = ste->proto;
512  kv.key[0] = ste_key.as_u64[0];
513  kv.key[1] = ste_key.as_u64[1];
514  kv.key[2] = ste_key.as_u64[2];
515  kv.key[3] = ste_key.as_u64[3];
516  kv.key[4] = ste_key.as_u64[4];
517  kv.key[5] = ste_key.as_u64[5];
518  clib_bihash_add_del_48_8 (&db->st.in2out, &kv, 0);
519 
520  clib_memset (&ste_key, 0, sizeof (ste_key));
521  ste_key.l_addr.ip4.as_u32 = bibe->out_addr.as_u32;
522  ste_key.r_addr.ip4.as_u32 = ste->out_r_addr.as_u32;
523  ste_key.l_port = bibe->out_port;
524  ste_key.r_port = ste->r_port;
525  ste_key.proto = ste->proto;
526  kv.key[0] = ste_key.as_u64[0];
527  kv.key[1] = ste_key.as_u64[1];
528  kv.key[2] = ste_key.as_u64[2];
529  kv.key[3] = ste_key.as_u64[3];
530  kv.key[4] = ste_key.as_u64[4];
531  kv.key[5] = ste_key.as_u64[5];
532  clib_bihash_add_del_48_8 (&db->st.out2in, &kv, 0);
533 
534  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
535  nat_ipfix_logging_nat64_session (thread_index, &bibe->in_addr,
536  &bibe->out_addr, bibe->proto,
537  bibe->in_port, bibe->out_port,
538  &ste->in_r_addr, &ste->out_r_addr,
539  ste->r_port, ste->r_port, fib->ft_table_id,
540  0);
541  nat_syslog_nat64_sdel (bibe->fib_index, &bibe->in_addr, bibe->in_port,
542  &bibe->out_addr, bibe->out_port, &ste->out_r_addr,
543  ste->r_port, bibe->proto);
544 
545  /* delete from pool */
546  pool_put (st, ste);
547 
548  /* decrement session number for BIB entry */
549  bibe->ses_num--;
550 
551  /* delete BIB entry if last session and dynamic */
552  if (!bibe->is_static && !bibe->ses_num)
553  nat64_db_bib_entry_free (thread_index, db, bibe);
554 }
555 
556 nat64_db_st_entry_t *
557 nat64_db_st_entry_find (nat64_db_t * db, ip46_address_t * l_addr,
558  ip46_address_t * r_addr, u16 l_port, u16 r_port,
559  u8 proto, u32 fib_index, u8 is_ip6)
560 {
561  nat64_db_st_entry_t *ste = 0;
562  nat64_db_st_entry_t *st;
563  nat64_db_st_entry_key_t ste_key;
564  clib_bihash_kv_48_8_t kv, value;
565 
566  switch (ip_proto_to_snat_proto (proto))
567  {
568 /* *INDENT-OFF* */
569 #define _(N, i, n, s) \
570  case SNAT_PROTOCOL_##N: \
571  st = db->st._##n##_st; \
572  break;
574 #undef _
575 /* *INDENT-ON* */
576  default:
577  st = db->st._unk_proto_st;
578  break;
579  }
580 
581  clib_memset (&ste_key, 0, sizeof (ste_key));
582  ste_key.l_addr.as_u64[0] = l_addr->as_u64[0];
583  ste_key.l_addr.as_u64[1] = l_addr->as_u64[1];
584  ste_key.r_addr.as_u64[0] = r_addr->as_u64[0];
585  ste_key.r_addr.as_u64[1] = r_addr->as_u64[1];
586  ste_key.fib_index = fib_index;
587  ste_key.l_port = l_port;
588  ste_key.r_port = r_port;
589  ste_key.proto = proto;
590  kv.key[0] = ste_key.as_u64[0];
591  kv.key[1] = ste_key.as_u64[1];
592  kv.key[2] = ste_key.as_u64[2];
593  kv.key[3] = ste_key.as_u64[3];
594  kv.key[4] = ste_key.as_u64[4];
595  kv.key[5] = ste_key.as_u64[5];
596 
597  if (!clib_bihash_search_48_8
598  (is_ip6 ? &db->st.in2out : &db->st.out2in, &kv, &value))
599  ste = pool_elt_at_index (st, value.value);
600 
601  return ste;
602 }
603 
604 u32
605 nat64_db_st_entry_get_index (nat64_db_t * db, nat64_db_st_entry_t * ste)
606 {
607  nat64_db_st_entry_t *st;
608 
609  switch (ip_proto_to_snat_proto (ste->proto))
610  {
611 /* *INDENT-OFF* */
612 #define _(N, i, n, s) \
613  case SNAT_PROTOCOL_##N: \
614  st = db->st._##n##_st; \
615  break;
617 #undef _
618 /* *INDENT-ON* */
619  default:
620  st = db->st._unk_proto_st;
621  return (u32) ~ 0;
622  }
623 
624  return ste - st;
625 }
626 
627 nat64_db_st_entry_t *
628 nat64_db_st_entry_by_index (nat64_db_t * db, u8 proto, u32 ste_index)
629 {
630  nat64_db_st_entry_t *st;
631 
632  switch (ip_proto_to_snat_proto (proto))
633  {
634 /* *INDENT-OFF* */
635 #define _(N, i, n, s) \
636  case SNAT_PROTOCOL_##N: \
637  st = db->st._##n##_st; \
638  break;
640 #undef _
641 /* *INDENT-ON* */
642  default:
643  st = db->st._unk_proto_st;
644  break;
645  }
646 
647  return pool_elt_at_index (st, ste_index);
648 }
649 
650 void
651 nad64_db_st_free_expired (u32 thread_index, nat64_db_t * db, u32 now)
652 {
653  u32 *ste_to_be_free = 0, *ste_index;
654  nat64_db_st_entry_t *st, *ste;
655 
656 /* *INDENT-OFF* */
657 #define _(N, i, n, s) \
658  st = db->st._##n##_st; \
659  pool_foreach (ste, st, ({\
660  if (i == SNAT_PROTOCOL_TCP && !ste->tcp_state) \
661  continue; \
662  if (ste->expire < now) \
663  vec_add1 (ste_to_be_free, ste - st); \
664  })); \
665  vec_foreach (ste_index, ste_to_be_free) \
666  nat64_db_st_entry_free (thread_index, db, \
667  pool_elt_at_index(st, ste_index[0])); \
668  vec_free (ste_to_be_free); \
669  ste_to_be_free = 0;
671 #undef _
672  st = db->st._unk_proto_st;
673  pool_foreach (ste, st, ({
674  if (ste->expire < now)
675  vec_add1 (ste_to_be_free, ste - st);
676  }));
677  vec_foreach (ste_index, ste_to_be_free)
678  nat64_db_st_entry_free (thread_index, db,
679  pool_elt_at_index(st, ste_index[0]));
680  vec_free (ste_to_be_free);
681 /* *INDENT-ON* */
682 }
683 
684 void
686  nat64_db_t * db, ip4_address_t * out_addr)
687 {
688  u32 *ste_to_be_free = 0, *ste_index;
689  nat64_db_st_entry_t *st, *ste;
690  nat64_db_bib_entry_t *bibe;
691 
692  db->addr_free = 1;
693 /* *INDENT-OFF* */
694 #define _(N, i, n, s) \
695  st = db->st._##n##_st; \
696  pool_foreach (ste, st, ({ \
697  bibe = pool_elt_at_index (db->bib._##n##_bib, ste->bibe_index); \
698  if (bibe->out_addr.as_u32 == out_addr->as_u32) \
699  vec_add1 (ste_to_be_free, ste - st); \
700  })); \
701  vec_foreach (ste_index, ste_to_be_free) \
702  nat64_db_st_entry_free (thread_index, db, \
703  pool_elt_at_index(st, ste_index[0])); \
704  vec_free (ste_to_be_free); \
705  ste_to_be_free = 0;
707 #undef _
708  st = db->st._unk_proto_st;
709  pool_foreach (ste, st, ({
710  bibe = pool_elt_at_index (db->bib._unk_proto_bib, ste->bibe_index);
711  if (bibe->out_addr.as_u32 == out_addr->as_u32)
712  vec_add1 (ste_to_be_free, ste - st);
713  }));
714  vec_foreach (ste_index, ste_to_be_free)
715  nat64_db_st_entry_free (thread_index, db,
716  pool_elt_at_index(st, ste_index[0]));
717  vec_free (ste_to_be_free);
718  db->addr_free = 0;
719 /* *INDENT-ON* */
720 }
721 
722 /*
723  * fd.io coding-style-patch-verification: ON
724  *
725  * Local Variables:
726  * eval: (c-set-style "gnu")
727  * End:
728  */
Definition: nat64_db.h:76
void nat64_db_free_out_addr(u32 thread_index, nat64_db_t *db, ip4_address_t *out_addr)
Free sessions using specific outside address.
Definition: nat64_db.c:685
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
nat64_db_free_addr_port_function_t free_addr_port_cb
Definition: nat64_db.h:140
u16 l_port
Definition: nat64_db.h:85
u64 as_u64[2]
Definition: ip6_packet.h:51
Definition: nat64_db.h:27
void nat_syslog_nat64_sdel(u32 sfibix, ip6_address_t *isaddr, u16 isport, ip4_address_t *xsaddr, u16 xsport, ip4_address_t *xdaddr, u16 xdport, snat_protocol_t proto)
Definition: nat_syslog.c:275
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
nat64_db_bib_entry_t * nat64_db_bib_entry_find(nat64_db_t *db, ip46_address_t *addr, u16 port, u8 proto, u32 fib_index, u8 is_ip6)
Find NAT64 BIB entry.
Definition: nat64_db.c:209
u32 fib_index
Definition: nat64_db.h:84
clib_memset(h->entries, 0, sizeof(h->entries[0])*entries)
nat64_db_st_entry_t * nat64_db_st_entry_by_index(nat64_db_t *db, u8 proto, u32 ste_index)
Get ST entry by index and protocol.
Definition: nat64_db.c:628
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
vhost_vring_addr_t addr
Definition: vhost_user.h:121
unsigned char u8
Definition: types.h:56
int(* nat64_db_bib_walk_fn_t)(nat64_db_bib_entry_t *bibe, void *ctx)
Call back function when walking NAT64 BIB, non-zero return value stop walk.
Definition: nat64_db.h:197
u32 st_entries_num
Definition: nat64_db.h:123
ip46_address_t l_addr
Definition: nat64_db.h:82
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:493
nat64_db_st_entry_t * nat64_db_st_entry_create(u32 thread_index, nat64_db_t *db, nat64_db_bib_entry_t *bibe, ip6_address_t *in_r_addr, ip4_address_t *out_r_addr, u16 r_port)
Create new NAT64 session table entry.
Definition: nat64_db.c:376
void nat_ipfix_logging_max_bibs(u32 thread_index, u32 limit)
Generate maximum BIB entries exceeded event.
u16 r_port
Definition: nat64_db.h:86
clib_bihash_48_8_t in2out
Definition: nat64_db.h:119
u16 port
Definition: nat64_db.h:35
unsigned int u32
Definition: types.h:88
u64 as_u64[6]
Definition: nat64_db.h:90
void nat_ipfix_logging_max_sessions(u32 thread_index, u32 limit)
Generate maximum session entries exceeded event.
clib_bihash_24_8_t in2out
Definition: nat64_db.h:69
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
void nad64_db_st_free_expired(u32 thread_index, nat64_db_t *db, u32 now)
Free expired session entries in session tables.
Definition: nat64_db.c:651
long ctx[MAX_CONNS]
Definition: main.c:144
unsigned short u16
Definition: types.h:57
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:286
void nat_syslog_nat64_sadd(u32 sfibix, ip6_address_t *isaddr, u16 isport, ip4_address_t *xsaddr, u16 xsport, ip4_address_t *xdaddr, u16 xdport, snat_protocol_t proto)
Definition: nat_syslog.c:265
nat64_db_st_t st
Definition: nat64_db.h:139
u8 addr_free
Definition: nat64_db.h:141
void nat_ipfix_logging_nat64_bib(u32 thread_index, ip6_address_t *src_ip, ip4_address_t *nat_src_ip, u8 proto, u16 src_port, u16 nat_src_port, u32 vrf_id, u8 is_create)
Generate NAT64 BIB create and delete events.
u32 ft_table_id
Table ID (hash key) for this FIB.
Definition: fib_table.h:89
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
ip46_address_t addr
Definition: nat64_db.h:33
void(* nat64_db_free_addr_port_function_t)(struct nat64_db_s *db, ip4_address_t *addr, u16 port, u8 proto)
Call back function to free NAT64 pool address and port when BIB entry is deleted. ...
Definition: nat64_db.h:132
void nat_ipfix_logging_nat64_session(u32 thread_index, ip6_address_t *src_ip, ip4_address_t *nat_src_ip, u8 proto, u16 src_port, u16 nat_src_port, ip6_address_t *dst_ip, ip4_address_t *nat_dst_ip, u16 dst_port, u16 nat_dst_port, u32 vrf_id, u8 is_create)
Generate NAT64 session create and delete events.
nat64_db_bib_entry_t * nat64_db_bib_entry_create(u32 thread_index, nat64_db_t *db, ip6_address_t *in_addr, ip4_address_t *out_addr, u16 in_port, u16 out_port, u32 fib_index, u8 proto, u8 is_static)
Create new NAT64 BIB entry.
Definition: nat64_db.c:53
u8 proto
Definition: nat64_db.h:87
nat64_db_st_entry_t * nat64_db_st_entry_find(nat64_db_t *db, ip46_address_t *l_addr, ip46_address_t *r_addr, u16 l_port, u16 r_port, u8 proto, u32 fib_index, u8 is_ip6)
Find NAT64 session table entry.
Definition: nat64_db.c:557
void nat64_db_st_walk(nat64_db_t *db, u8 proto, nat64_db_st_walk_fn_t fn, void *ctx)
Walk NAT64 session table.
Definition: nat64_db.c:325
u32 nat64_db_st_entry_get_index(nat64_db_t *db, nat64_db_st_entry_t *ste)
Definition: nat64_db.c:605
u32 fib_index
Definition: nat64_db.h:34
nat64_db_bib_entry_t * nat64_db_bib_entry_by_index(nat64_db_t *db, u8 proto, u32 bibe_index)
Get BIB entry by index and protocol.
Definition: nat64_db.c:302
u32 bib_entries_num
Definition: nat64_db.h:73
u8 proto
Definition: nat64_db.h:36
clib_bihash_24_8_t out2in
Definition: nat64_db.h:70
static u32 ip_proto_to_snat_proto(u8 ip_proto)
The NAT inline functions.
Definition: nat_inlines.h:27
NAT syslog logging.
fib_table_t * fib_table_get(fib_node_index_t index, fib_protocol_t proto)
Get a pointer to a FIB table.
Definition: fib_table.c:27
void nat64_db_bib_entry_free(u32 thread_index, nat64_db_t *db, nat64_db_bib_entry_t *bibe)
Free NAT64 BIB entry.
Definition: nat64_db.c:129
void nat64_db_st_entry_free(u32 thread_index, nat64_db_t *db, nat64_db_st_entry_t *ste)
Free NAT64 session table entry.
Definition: nat64_db.c:472
int(* nat64_db_st_walk_fn_t)(nat64_db_st_entry_t *ste, void *ctx)
Call back function when walking NAT64 session table, non-zero return value stop walk.
Definition: nat64_db.h:299
NAT64 DB.
#define vec_foreach(var, vec)
Vector iterator.
u8 rsvd
Definition: nat64_db.h:37
void nat64_db_bib_walk(nat64_db_t *db, u8 proto, nat64_db_bib_walk_fn_t fn, void *ctx)
Walk NAT64 BIB.
Definition: nat64_db.c:251
u64 as_u64[3]
Definition: nat64_db.h:39
ip46_address_t r_addr
Definition: nat64_db.h:83
A protocol Independent FIB table.
Definition: fib_table.h:69
clib_bihash_48_8_t out2in
Definition: nat64_db.h:120