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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <snat/nat64_db.h>
22 nat64_db_init (nat64_db_t * db)
24 u32 bib_buckets = 1024;
25 u32 bib_memory_size = 128 << 20;
26 u32 st_buckets = 2048;
27 u32 st_memory_size = 256 << 20;
29 clib_bihash_init_24_8 (&db->bib.in2out, "bib-in2out", bib_buckets,
32 clib_bihash_init_24_8 (&db->bib.out2in, "bib-out2in", bib_buckets,
35 clib_bihash_init_48_8 (&db->st.in2out, "st-in2out", st_buckets,
38 clib_bihash_init_48_8 (&db->st.out2in, "st-out2in", st_buckets,
44 nat64_db_bib_entry_t *
45 nat64_db_bib_entry_create (nat64_db_t * db, ip6_address_t * in_addr,
46 ip4_address_t * out_addr, u16 in_port,
47 u16 out_port, u32 fib_index, u8 proto,
50 nat64_db_bib_entry_t *bibe;
51 nat64_db_bib_entry_key_t bibe_key;
52 clib_bihash_kv_24_8_t kv;
54 /* create pool entry */
55 switch (ip_proto_to_snat_proto (proto))
58 #define _(N, i, n, s) \
59 case SNAT_PROTOCOL_##N: \
60 pool_get (db->bib._##n##_bib, bibe); \
61 kv.value = bibe - db->bib._##n##_bib; \
67 pool_get (db->bib._unk_proto_bib, bibe);
68 kv.value = bibe - db->bib._unk_proto_bib;
71 memset (bibe, 0, sizeof (*bibe));
72 bibe->in_addr.as_u64[0] = in_addr->as_u64[0];
73 bibe->in_addr.as_u64[1] = in_addr->as_u64[1];
74 bibe->in_port = in_port;
75 bibe->out_addr.as_u32 = out_addr->as_u32;
76 bibe->out_port = out_port;
77 bibe->fib_index = fib_index;
79 bibe->is_static = is_static;
81 /* create hash lookup */
82 bibe_key.addr.as_u64[0] = bibe->in_addr.as_u64[0];
83 bibe_key.addr.as_u64[1] = bibe->in_addr.as_u64[1];
84 bibe_key.fib_index = bibe->fib_index;
85 bibe_key.port = bibe->in_port;
86 bibe_key.proto = bibe->proto;
88 kv.key[0] = bibe_key.as_u64[0];
89 kv.key[1] = bibe_key.as_u64[1];
90 kv.key[2] = bibe_key.as_u64[2];
91 clib_bihash_add_del_24_8 (&db->bib.in2out, &kv, 1);
93 memset (&bibe_key.addr, 0, sizeof (bibe_key.addr));
94 bibe_key.addr.ip4.as_u32 = bibe->out_addr.as_u32;
95 bibe_key.fib_index = 0;
96 bibe_key.port = bibe->out_port;
97 kv.key[0] = bibe_key.as_u64[0];
98 kv.key[1] = bibe_key.as_u64[1];
99 kv.key[2] = bibe_key.as_u64[2];
100 clib_bihash_add_del_24_8 (&db->bib.out2in, &kv, 1);
106 nat64_db_bib_entry_free (nat64_db_t * db, nat64_db_bib_entry_t * bibe)
108 nat64_db_bib_entry_key_t bibe_key;
109 clib_bihash_kv_24_8_t kv;
110 nat64_db_bib_entry_t *bib;
111 u32 *ste_to_be_free = 0, *ste_index, bibe_index;
112 nat64_db_st_entry_t *st, *ste;
114 switch (ip_proto_to_snat_proto (bibe->proto))
117 #define _(N, i, n, s) \
118 case SNAT_PROTOCOL_##N: \
119 bib = db->bib._##n##_bib; \
120 st = db->st._##n##_st; \
122 foreach_snat_protocol
126 bib = db->bib._unk_proto_bib;
127 st = db->st._unk_proto_st;
131 bibe_index = bibe - bib;
133 /* delete ST entries for static BIB entry */
136 pool_foreach (ste, st, (
138 if (ste->bibe_index == bibe_index)
139 vec_add1 (ste_to_be_free, ste - st);}
141 vec_foreach (ste_index, ste_to_be_free)
142 nat64_db_st_entry_free (db, pool_elt_at_index (st, ste_index[0]));
143 vec_free (ste_to_be_free);
146 /* delete hash lookup */
147 bibe_key.addr.as_u64[0] = bibe->in_addr.as_u64[0];
148 bibe_key.addr.as_u64[1] = bibe->in_addr.as_u64[1];
149 bibe_key.fib_index = bibe->fib_index;
150 bibe_key.port = bibe->in_port;
151 bibe_key.proto = bibe->proto;
153 kv.key[0] = bibe_key.as_u64[0];
154 kv.key[1] = bibe_key.as_u64[1];
155 kv.key[2] = bibe_key.as_u64[2];
156 clib_bihash_add_del_24_8 (&db->bib.in2out, &kv, 0);
158 memset (&bibe_key.addr, 0, sizeof (bibe_key.addr));
159 bibe_key.addr.ip4.as_u32 = bibe->out_addr.as_u32;
160 bibe_key.fib_index = 0;
161 bibe_key.port = bibe->out_port;
162 kv.key[0] = bibe_key.as_u64[0];
163 kv.key[1] = bibe_key.as_u64[1];
164 kv.key[2] = bibe_key.as_u64[2];
165 clib_bihash_add_del_24_8 (&db->bib.out2in, &kv, 0);
167 /* delete from pool */
168 pool_put (bib, bibe);
172 nat64_db_bib_entry_t *
173 nat64_db_bib_entry_find (nat64_db_t * db, ip46_address_t * addr, u16 port,
174 u8 proto, u32 fib_index, u8 is_ip6)
176 nat64_db_bib_entry_t *bibe = 0;
177 nat64_db_bib_entry_key_t bibe_key;
178 clib_bihash_kv_24_8_t kv, value;
179 nat64_db_bib_entry_t *bib;
181 switch (ip_proto_to_snat_proto (proto))
184 #define _(N, i, n, s) \
185 case SNAT_PROTOCOL_##N: \
186 bib = db->bib._##n##_bib; \
188 foreach_snat_protocol
192 bib = db->bib._unk_proto_bib;
196 bibe_key.addr.as_u64[0] = addr->as_u64[0];
197 bibe_key.addr.as_u64[1] = addr->as_u64[1];
198 bibe_key.fib_index = fib_index;
199 bibe_key.port = port;
200 bibe_key.proto = proto;
203 kv.key[0] = bibe_key.as_u64[0];
204 kv.key[1] = bibe_key.as_u64[1];
205 kv.key[2] = bibe_key.as_u64[2];
207 if (!clib_bihash_search_24_8
208 (is_ip6 ? &db->bib.in2out : &db->bib.out2in, &kv, &value))
209 bibe = pool_elt_at_index (bib, value.value);
215 nat64_db_bib_walk (nat64_db_t * db, u8 proto,
216 nat64_db_bib_walk_fn_t fn, void *ctx)
218 nat64_db_bib_entry_t *bib, *bibe;
220 switch (ip_proto_to_snat_proto (proto))
223 #define _(N, i, n, s) \
224 case SNAT_PROTOCOL_##N: \
225 bib = db->bib._##n##_bib; \
227 foreach_snat_protocol
231 bib = db->bib._unk_proto_bib;
236 pool_foreach (bibe, bib,
244 nat64_db_bib_entry_t *
245 nat64_db_bib_entry_by_index (nat64_db_t * db, u8 proto, u32 bibe_index)
247 nat64_db_bib_entry_t *bib;
249 switch (ip_proto_to_snat_proto (proto))
252 #define _(N, i, n, s) \
253 case SNAT_PROTOCOL_##N: \
254 bib = db->bib._##n##_bib; \
256 foreach_snat_protocol
260 bib = db->bib._unk_proto_bib;
264 return pool_elt_at_index (bib, bibe_index);
268 nat64_db_st_walk (nat64_db_t * db, u8 proto,
269 nat64_db_st_walk_fn_t fn, void *ctx)
271 nat64_db_st_entry_t *st, *ste;
273 switch (ip_proto_to_snat_proto (proto))
276 #define _(N, i, n, s) \
277 case SNAT_PROTOCOL_##N: \
278 st = db->st._##n##_st; \
280 foreach_snat_protocol
284 st = db->st._unk_proto_st;
289 pool_foreach (ste, st,
297 nat64_db_st_entry_t *
298 nat64_db_st_entry_create (nat64_db_t * db, nat64_db_bib_entry_t * bibe,
299 ip6_address_t * in_r_addr,
300 ip4_address_t * out_r_addr, u16 r_port)
302 nat64_db_st_entry_t *ste;
303 nat64_db_bib_entry_t *bib;
304 nat64_db_st_entry_key_t ste_key;
305 clib_bihash_kv_48_8_t kv;
307 /* create pool entry */
308 switch (ip_proto_to_snat_proto (bibe->proto))
311 #define _(N, i, n, s) \
312 case SNAT_PROTOCOL_##N: \
313 pool_get (db->st._##n##_st, ste); \
314 kv.value = ste - db->st._##n##_st; \
315 bib = db->bib._##n##_bib; \
317 foreach_snat_protocol
321 pool_get (db->st._unk_proto_st, ste);
322 kv.value = ste - db->st._unk_proto_st;
323 bib = db->bib._unk_proto_bib;
326 memset (ste, 0, sizeof (*ste));
327 ste->in_r_addr.as_u64[0] = in_r_addr->as_u64[0];
328 ste->in_r_addr.as_u64[1] = in_r_addr->as_u64[1];
329 ste->out_r_addr.as_u32 = out_r_addr->as_u32;
330 ste->r_port = r_port;
331 ste->bibe_index = bibe - bib;
332 ste->proto = bibe->proto;
334 /* increment session number for BIB entry */
337 /* create hash lookup */
338 memset (&ste_key, 0, sizeof (ste_key));
339 ste_key.l_addr.as_u64[0] = bibe->in_addr.as_u64[0];
340 ste_key.l_addr.as_u64[1] = bibe->in_addr.as_u64[1];
341 ste_key.r_addr.as_u64[0] = ste->in_r_addr.as_u64[0];
342 ste_key.r_addr.as_u64[1] = ste->in_r_addr.as_u64[1];
343 ste_key.fib_index = bibe->fib_index;
344 ste_key.l_port = bibe->in_port;
345 ste_key.r_port = ste->r_port;
346 ste_key.proto = ste->proto;
347 kv.key[0] = ste_key.as_u64[0];
348 kv.key[1] = ste_key.as_u64[1];
349 kv.key[2] = ste_key.as_u64[2];
350 kv.key[3] = ste_key.as_u64[3];
351 kv.key[4] = ste_key.as_u64[4];
352 kv.key[5] = ste_key.as_u64[5];
353 clib_bihash_add_del_48_8 (&db->st.in2out, &kv, 1);
355 memset (&ste_key, 0, sizeof (ste_key));
356 ste_key.l_addr.ip4.as_u32 = bibe->out_addr.as_u32;
357 ste_key.r_addr.ip4.as_u32 = ste->out_r_addr.as_u32;
358 ste_key.l_port = bibe->out_port;
359 ste_key.r_port = ste->r_port;
360 ste_key.proto = ste->proto;
361 kv.key[0] = ste_key.as_u64[0];
362 kv.key[1] = ste_key.as_u64[1];
363 kv.key[2] = ste_key.as_u64[2];
364 kv.key[3] = ste_key.as_u64[3];
365 kv.key[4] = ste_key.as_u64[4];
366 kv.key[5] = ste_key.as_u64[5];
367 clib_bihash_add_del_48_8 (&db->st.out2in, &kv, 1);
373 nat64_db_st_entry_free (nat64_db_t * db, nat64_db_st_entry_t * ste)
375 nat64_db_st_entry_t *st;
376 nat64_db_bib_entry_t *bib, *bibe;
377 nat64_db_st_entry_key_t ste_key;
378 clib_bihash_kv_48_8_t kv;
380 switch (ip_proto_to_snat_proto (ste->proto))
383 #define _(N, i, n, s) \
384 case SNAT_PROTOCOL_##N: \
385 st = db->st._##n##_st; \
386 bib = db->bib._##n##_bib; \
388 foreach_snat_protocol
392 st = db->st._unk_proto_st;
393 bib = db->bib._unk_proto_bib;
397 bibe = pool_elt_at_index (bib, ste->bibe_index);
399 /* delete hash lookup */
400 memset (&ste_key, 0, sizeof (ste_key));
401 ste_key.l_addr.as_u64[0] = bibe->in_addr.as_u64[0];
402 ste_key.l_addr.as_u64[1] = bibe->in_addr.as_u64[1];
403 ste_key.r_addr.as_u64[0] = ste->in_r_addr.as_u64[0];
404 ste_key.r_addr.as_u64[1] = ste->in_r_addr.as_u64[1];
405 ste_key.fib_index = bibe->fib_index;
406 ste_key.l_port = bibe->in_port;
407 ste_key.r_port = ste->r_port;
408 ste_key.proto = ste->proto;
409 kv.key[0] = ste_key.as_u64[0];
410 kv.key[1] = ste_key.as_u64[1];
411 kv.key[2] = ste_key.as_u64[2];
412 kv.key[3] = ste_key.as_u64[3];
413 kv.key[4] = ste_key.as_u64[4];
414 kv.key[5] = ste_key.as_u64[5];
415 clib_bihash_add_del_48_8 (&db->st.in2out, &kv, 0);
417 memset (&ste_key, 0, sizeof (ste_key));
418 ste_key.l_addr.ip4.as_u32 = bibe->out_addr.as_u32;
419 ste_key.r_addr.ip4.as_u32 = ste->out_r_addr.as_u32;
420 ste_key.l_port = bibe->out_port;
421 ste_key.r_port = ste->r_port;
422 ste_key.proto = ste->proto;
423 kv.key[0] = ste_key.as_u64[0];
424 kv.key[1] = ste_key.as_u64[1];
425 kv.key[2] = ste_key.as_u64[2];
426 kv.key[3] = ste_key.as_u64[3];
427 kv.key[4] = ste_key.as_u64[4];
428 kv.key[5] = ste_key.as_u64[5];
429 clib_bihash_add_del_48_8 (&db->st.out2in, &kv, 0);
431 /* delete from pool */
434 /* decrement session number for BIB entry */
437 /* delete BIB entry if last session and dynamic */
438 if (!bibe->is_static && !bibe->ses_num)
439 nat64_db_bib_entry_free (db, bibe);
442 nat64_db_st_entry_t *
443 nat64_db_st_entry_find (nat64_db_t * db, ip46_address_t * l_addr,
444 ip46_address_t * r_addr, u16 l_port, u16 r_port,
445 u8 proto, u32 fib_index, u8 is_ip6)
447 nat64_db_st_entry_t *ste = 0;
448 nat64_db_st_entry_t *st;
449 nat64_db_st_entry_key_t ste_key;
450 clib_bihash_kv_48_8_t kv, value;
452 switch (ip_proto_to_snat_proto (proto))
455 #define _(N, i, n, s) \
456 case SNAT_PROTOCOL_##N: \
457 st = db->st._##n##_st; \
459 foreach_snat_protocol
463 st = db->st._unk_proto_st;
467 memset (&ste_key, 0, sizeof (ste_key));
468 ste_key.l_addr.as_u64[0] = l_addr->as_u64[0];
469 ste_key.l_addr.as_u64[1] = l_addr->as_u64[1];
470 ste_key.r_addr.as_u64[0] = r_addr->as_u64[0];
471 ste_key.r_addr.as_u64[1] = r_addr->as_u64[1];
472 ste_key.fib_index = fib_index;
473 ste_key.l_port = l_port;
474 ste_key.r_port = r_port;
475 ste_key.proto = proto;
476 kv.key[0] = ste_key.as_u64[0];
477 kv.key[1] = ste_key.as_u64[1];
478 kv.key[2] = ste_key.as_u64[2];
479 kv.key[3] = ste_key.as_u64[3];
480 kv.key[4] = ste_key.as_u64[4];
481 kv.key[5] = ste_key.as_u64[5];
483 if (!clib_bihash_search_48_8
484 (is_ip6 ? &db->st.in2out : &db->st.out2in, &kv, &value))
485 ste = pool_elt_at_index (st, value.value);
491 nad64_db_st_free_expired (nat64_db_t * db, u32 now)
493 u32 *ste_to_be_free = 0, *ste_index;
494 nat64_db_st_entry_t *st, *ste;
497 #define _(N, i, n, s) \
498 st = db->st._##n##_st; \
499 pool_foreach (ste, st, ({\
500 if (i == SNAT_PROTOCOL_TCP && !ste->tcp_state) \
502 if (ste->expire < now) \
503 vec_add1 (ste_to_be_free, ste - st); \
505 vec_foreach (ste_index, ste_to_be_free) \
506 nat64_db_st_entry_free (db, pool_elt_at_index(st, ste_index[0])); \
507 vec_free (ste_to_be_free); \
509 foreach_snat_protocol
511 st = db->st._unk_proto_st;
512 pool_foreach (ste, st, ({
513 if (ste->expire < now)
514 vec_add1 (ste_to_be_free, ste - st);
516 vec_foreach (ste_index, ste_to_be_free)
517 nat64_db_st_entry_free (db, pool_elt_at_index(st, ste_index[0]));
518 vec_free (ste_to_be_free);
523 nat64_db_free_out_addr (nat64_db_t * db, ip4_address_t * out_addr)
525 u32 *ste_to_be_free = 0, *ste_index;
526 nat64_db_st_entry_t *st, *ste;
527 nat64_db_bib_entry_t *bibe;
530 #define _(N, i, n, s) \
531 st = db->st._##n##_st; \
532 pool_foreach (ste, st, ({ \
533 bibe = pool_elt_at_index (db->bib._##n##_bib, ste->bibe_index); \
534 if (bibe->out_addr.as_u32 == out_addr->as_u32) \
535 vec_add1 (ste_to_be_free, ste - st); \
537 vec_foreach (ste_index, ste_to_be_free) \
538 nat64_db_st_entry_free (db, pool_elt_at_index(st, ste_index[0])); \
539 vec_free (ste_to_be_free); \
541 foreach_snat_protocol
543 st = db->st._unk_proto_st;
544 pool_foreach (ste, st, ({
545 bibe = pool_elt_at_index (db->bib._unk_proto_bib, ste->bibe_index);
546 if (bibe->out_addr.as_u32 == out_addr->as_u32)
547 vec_add1 (ste_to_be_free, ste - st);
549 vec_foreach (ste_index, ste_to_be_free)
550 nat64_db_st_entry_free (db, pool_elt_at_index(st, ste_index[0]));
551 vec_free (ste_to_be_free);
556 * fd.io coding-style-patch-verification: ON
559 * eval: (c-set-style "gnu")