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.
17 * @brief NAT plugin virtual fragmentation reassembly
20 #include <vnet/vnet.h>
21 #include <nat/nat_reass.h>
22 #include <nat/nat_ipfix_logging.h>
24 nat_reass_main_t nat_reass_main;
27 nat_reass_get_nbuckets (u8 is_ip6)
29 nat_reass_main_t *srm = &nat_reass_main;
34 nbuckets = (u32) (srm->ip6_max_reass / NAT_REASS_HT_LOAD_FACTOR);
36 nbuckets = (u32) (srm->ip4_max_reass / NAT_REASS_HT_LOAD_FACTOR);
38 for (i = 0; i < 31; i++)
39 if ((1 << i) >= nbuckets)
46 static_always_inline void
47 nat_ip4_reass_get_frags_inline (nat_reass_ip4_t * reass, u32 ** bi)
49 nat_reass_main_t *srm = &nat_reass_main;
54 clib_dlist_remove_head (srm->ip4_frags_list_pool,
55 reass->frags_per_reass_list_head_index)) !=
58 elt = pool_elt_at_index (srm->ip4_frags_list_pool, elt_index);
59 vec_add1 (*bi, elt->value);
61 pool_put_index (srm->ip4_frags_list_pool, elt_index);
65 static_always_inline void
66 nat_ip6_reass_get_frags_inline (nat_reass_ip6_t * reass, u32 ** bi)
68 nat_reass_main_t *srm = &nat_reass_main;
73 clib_dlist_remove_head (srm->ip6_frags_list_pool,
74 reass->frags_per_reass_list_head_index)) !=
77 elt = pool_elt_at_index (srm->ip6_frags_list_pool, elt_index);
78 vec_add1 (*bi, elt->value);
80 pool_put_index (srm->ip6_frags_list_pool, elt_index);
85 nat_reass_set (u32 timeout, u16 max_reass, u8 max_frag, u8 drop_frag,
88 nat_reass_main_t *srm = &nat_reass_main;
93 if (srm->ip6_max_reass != max_reass)
95 clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
97 srm->ip6_max_reass = max_reass;
98 pool_free (srm->ip6_reass_pool);
99 pool_alloc (srm->ip6_reass_pool, srm->ip4_max_reass);
100 nbuckets = nat_reass_get_nbuckets (0);
101 clib_bihash_free_48_8 (&srm->ip6_reass_hash);
102 clib_bihash_init_48_8 (&srm->ip6_reass_hash, "nat-ip6-reass",
103 nbuckets, nbuckets * 1024);
105 clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
107 srm->ip6_timeout = timeout;
108 srm->ip6_max_frag = max_frag;
109 srm->ip6_drop_frag = drop_frag;
113 if (srm->ip4_max_reass != max_reass)
115 clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
117 srm->ip4_max_reass = max_reass;
118 pool_free (srm->ip4_reass_pool);
119 pool_alloc (srm->ip4_reass_pool, srm->ip4_max_reass);
120 nbuckets = nat_reass_get_nbuckets (0);
121 clib_bihash_free_16_8 (&srm->ip4_reass_hash);
122 clib_bihash_init_16_8 (&srm->ip4_reass_hash, "nat-ip4-reass",
123 nbuckets, nbuckets * 1024);
124 clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
126 srm->ip4_timeout = timeout;
127 srm->ip4_max_frag = max_frag;
128 srm->ip4_drop_frag = drop_frag;
135 nat_reass_get_timeout (u8 is_ip6)
137 nat_reass_main_t *srm = &nat_reass_main;
140 return srm->ip6_timeout;
142 return srm->ip4_timeout;
146 nat_reass_get_max_reass (u8 is_ip6)
148 nat_reass_main_t *srm = &nat_reass_main;
151 return srm->ip6_max_reass;
153 return srm->ip4_max_reass;
157 nat_reass_get_max_frag (u8 is_ip6)
159 nat_reass_main_t *srm = &nat_reass_main;
162 return srm->ip6_max_frag;
164 return srm->ip4_max_frag;
168 nat_reass_is_drop_frag (u8 is_ip6)
170 nat_reass_main_t *srm = &nat_reass_main;
173 return srm->ip6_drop_frag;
175 return srm->ip4_drop_frag;
178 static_always_inline nat_reass_ip4_t *
179 nat_ip4_reass_lookup (nat_reass_ip4_key_t * k, f64 now)
181 nat_reass_main_t *srm = &nat_reass_main;
182 clib_bihash_kv_16_8_t kv, value;
183 nat_reass_ip4_t *reass;
185 kv.key[0] = k->as_u64[0];
186 kv.key[1] = k->as_u64[1];
188 if (clib_bihash_search_16_8 (&srm->ip4_reass_hash, &kv, &value))
191 reass = pool_elt_at_index (srm->ip4_reass_pool, value.value);
192 if (now < reass->last_heard + (f64) srm->ip4_timeout)
199 nat_ip4_reass_find (ip4_address_t src, ip4_address_t dst, u16 frag_id,
202 nat_reass_main_t *srm = &nat_reass_main;
203 nat_reass_ip4_t *reass = 0;
204 nat_reass_ip4_key_t k;
205 f64 now = vlib_time_now (srm->vlib_main);
207 k.src.as_u32 = src.as_u32;
208 k.dst.as_u32 = dst.as_u32;
212 clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
213 reass = nat_ip4_reass_lookup (&k, now);
214 clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
220 nat_ip4_reass_find_or_create (ip4_address_t src, ip4_address_t dst,
221 u16 frag_id, u8 proto, u8 reset_timeout,
224 nat_reass_main_t *srm = &nat_reass_main;
225 nat_reass_ip4_t *reass = 0;
226 nat_reass_ip4_key_t k;
227 f64 now = vlib_time_now (srm->vlib_main);
228 dlist_elt_t *oldest_elt, *elt;
229 dlist_elt_t *per_reass_list_head_elt;
230 u32 oldest_index, elt_index;
231 clib_bihash_kv_16_8_t kv, value;
233 k.src.as_u32 = src.as_u32;
234 k.dst.as_u32 = dst.as_u32;
238 clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
240 reass = nat_ip4_reass_lookup (&k, now);
245 reass->last_heard = now;
246 clib_dlist_remove (srm->ip4_reass_lru_list_pool,
247 reass->lru_list_index);
248 clib_dlist_addtail (srm->ip4_reass_lru_list_pool,
249 srm->ip4_reass_head_index,
250 reass->lru_list_index);
253 if (reass->flags & NAT_REASS_FLAG_MAX_FRAG_DROP)
262 if (srm->ip4_reass_n >= srm->ip4_max_reass)
265 clib_dlist_remove_head (srm->ip4_reass_lru_list_pool,
266 srm->ip4_reass_head_index);
267 ASSERT (oldest_index != ~0);
269 pool_elt_at_index (srm->ip4_reass_lru_list_pool, oldest_index);
270 reass = pool_elt_at_index (srm->ip4_reass_pool, oldest_elt->value);
271 if (now < reass->last_heard + (f64) srm->ip4_timeout)
273 clib_dlist_addhead (srm->ip4_reass_lru_list_pool,
274 srm->ip4_reass_head_index, oldest_index);
275 nat_log_warn ("no free resassembly slot");
280 clib_dlist_addtail (srm->ip4_reass_lru_list_pool,
281 srm->ip4_reass_head_index, oldest_index);
283 kv.key[0] = reass->key.as_u64[0];
284 kv.key[1] = reass->key.as_u64[1];
285 if (!clib_bihash_search_16_8 (&srm->ip4_reass_hash, &kv, &value))
287 if (value.value == (reass - srm->ip4_reass_pool))
289 if (clib_bihash_add_del_16_8 (&srm->ip4_reass_hash, &kv, 0))
297 nat_ip4_reass_get_frags_inline (reass, bi_to_drop);
301 pool_get (srm->ip4_reass_pool, reass);
302 pool_get (srm->ip4_reass_lru_list_pool, elt);
303 reass->lru_list_index = elt_index = elt - srm->ip4_reass_lru_list_pool;
304 clib_dlist_init (srm->ip4_reass_lru_list_pool, elt_index);
305 elt->value = reass - srm->ip4_reass_pool;
306 clib_dlist_addtail (srm->ip4_reass_lru_list_pool,
307 srm->ip4_reass_head_index, elt_index);
308 pool_get (srm->ip4_frags_list_pool, per_reass_list_head_elt);
309 reass->frags_per_reass_list_head_index =
310 per_reass_list_head_elt - srm->ip4_frags_list_pool;
311 clib_dlist_init (srm->ip4_frags_list_pool,
312 reass->frags_per_reass_list_head_index);
316 reass->key.as_u64[0] = kv.key[0] = k.as_u64[0];
317 reass->key.as_u64[1] = kv.key[1] = k.as_u64[1];
318 kv.value = reass - srm->ip4_reass_pool;
319 reass->sess_index = (u32) ~ 0;
320 reass->thread_index = (u32) ~ 0;
321 reass->last_heard = now;
324 reass->classify_next = NAT_REASS_IP4_CLASSIFY_NONE;
326 if (clib_bihash_add_del_16_8 (&srm->ip4_reass_hash, &kv, 1))
333 clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
338 nat_ip4_reass_add_fragment (nat_reass_ip4_t * reass, u32 bi,
341 nat_reass_main_t *srm = &nat_reass_main;
345 if (reass->frag_n >= srm->ip4_max_frag)
347 nat_ipfix_logging_max_fragments_ip4 (srm->ip4_max_frag,
349 reass->flags |= NAT_REASS_FLAG_MAX_FRAG_DROP;
350 nat_ip4_reass_get_frags_inline (reass, bi_to_drop);
354 clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
356 pool_get (srm->ip4_frags_list_pool, elt);
357 elt_index = elt - srm->ip4_frags_list_pool;
358 clib_dlist_init (srm->ip4_frags_list_pool, elt_index);
360 clib_dlist_addtail (srm->ip4_frags_list_pool,
361 reass->frags_per_reass_list_head_index, elt_index);
364 clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
370 nat_ip4_reass_get_frags (nat_reass_ip4_t * reass, u32 ** bi)
372 nat_reass_main_t *srm = &nat_reass_main;
374 clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
376 nat_ip4_reass_get_frags_inline (reass, bi);
378 clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
382 nat_ip4_reass_walk (nat_ip4_reass_walk_fn_t fn, void *ctx)
384 nat_reass_ip4_t *reass;
385 nat_reass_main_t *srm = &nat_reass_main;
386 f64 now = vlib_time_now (srm->vlib_main);
389 pool_foreach (reass, srm->ip4_reass_pool,
391 if (now < reass->last_heard + (f64) srm->ip4_timeout)
400 static_always_inline nat_reass_ip6_t *
401 nat_ip6_reass_lookup (nat_reass_ip6_key_t * k, f64 now)
403 nat_reass_main_t *srm = &nat_reass_main;
404 clib_bihash_kv_48_8_t kv, value;
405 nat_reass_ip6_t *reass;
408 kv.key[0] = k->as_u64[0];
409 kv.key[1] = k->as_u64[1];
410 kv.key[2] = k->as_u64[2];
411 kv.key[3] = k->as_u64[3];
412 kv.key[4] = k->as_u64[4];
413 kv.key[5] = k->as_u64[5];
415 if (clib_bihash_search_48_8 (&srm->ip6_reass_hash, &kv, &value))
418 reass = pool_elt_at_index (srm->ip6_reass_pool, value.value);
419 if (now < reass->last_heard + (f64) srm->ip6_timeout)
426 nat_ip6_reass_find_or_create (ip6_address_t src, ip6_address_t dst,
427 u32 frag_id, u8 proto, u8 reset_timeout,
430 nat_reass_main_t *srm = &nat_reass_main;
431 nat_reass_ip6_t *reass = 0;
432 nat_reass_ip6_key_t k;
433 f64 now = vlib_time_now (srm->vlib_main);
434 dlist_elt_t *oldest_elt, *elt;
435 dlist_elt_t *per_reass_list_head_elt;
436 u32 oldest_index, elt_index;
437 clib_bihash_kv_48_8_t kv;
439 k.src.as_u64[0] = src.as_u64[0];
440 k.src.as_u64[1] = src.as_u64[1];
441 k.dst.as_u64[0] = dst.as_u64[0];
442 k.dst.as_u64[1] = dst.as_u64[1];
447 clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
449 reass = nat_ip6_reass_lookup (&k, now);
454 reass->last_heard = now;
455 clib_dlist_remove (srm->ip6_reass_lru_list_pool,
456 reass->lru_list_index);
457 clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
458 srm->ip6_reass_head_index,
459 reass->lru_list_index);
462 if (reass->flags & NAT_REASS_FLAG_MAX_FRAG_DROP)
471 if (srm->ip6_reass_n >= srm->ip6_max_reass)
474 clib_dlist_remove_head (srm->ip6_reass_lru_list_pool,
475 srm->ip6_reass_head_index);
476 ASSERT (oldest_index != ~0);
478 pool_elt_at_index (srm->ip4_reass_lru_list_pool, oldest_index);
479 reass = pool_elt_at_index (srm->ip6_reass_pool, oldest_elt->value);
480 if (now < reass->last_heard + (f64) srm->ip6_timeout)
482 clib_dlist_addhead (srm->ip6_reass_lru_list_pool,
483 srm->ip6_reass_head_index, oldest_index);
484 nat_log_warn ("no free resassembly slot");
489 clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
490 srm->ip6_reass_head_index, oldest_index);
492 kv.key[0] = k.as_u64[0];
493 kv.key[1] = k.as_u64[1];
494 kv.key[2] = k.as_u64[2];
495 kv.key[3] = k.as_u64[4];
496 kv.key[4] = k.as_u64[5];
497 if (clib_bihash_add_del_48_8 (&srm->ip6_reass_hash, &kv, 0))
503 nat_ip6_reass_get_frags_inline (reass, bi_to_drop);
507 pool_get (srm->ip6_reass_pool, reass);
508 pool_get (srm->ip6_reass_lru_list_pool, elt);
509 reass->lru_list_index = elt_index = elt - srm->ip6_reass_lru_list_pool;
510 clib_dlist_init (srm->ip6_reass_lru_list_pool, elt_index);
511 elt->value = reass - srm->ip6_reass_pool;
512 clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
513 srm->ip6_reass_head_index, elt_index);
514 pool_get (srm->ip6_frags_list_pool, per_reass_list_head_elt);
515 reass->frags_per_reass_list_head_index =
516 per_reass_list_head_elt - srm->ip6_frags_list_pool;
517 clib_dlist_init (srm->ip6_frags_list_pool,
518 reass->frags_per_reass_list_head_index);
522 reass->key.as_u64[0] = kv.key[0] = k.as_u64[0];
523 reass->key.as_u64[1] = kv.key[1] = k.as_u64[1];
524 reass->key.as_u64[2] = kv.key[2] = k.as_u64[2];
525 reass->key.as_u64[3] = kv.key[3] = k.as_u64[3];
526 reass->key.as_u64[4] = kv.key[4] = k.as_u64[4];
527 reass->key.as_u64[5] = kv.key[5] = k.as_u64[5];
528 kv.value = reass - srm->ip6_reass_pool;
529 reass->sess_index = (u32) ~ 0;
530 reass->last_heard = now;
532 if (clib_bihash_add_del_48_8 (&srm->ip6_reass_hash, &kv, 1))
539 clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
544 nat_ip6_reass_add_fragment (nat_reass_ip6_t * reass, u32 bi,
547 nat_reass_main_t *srm = &nat_reass_main;
551 if (reass->frag_n >= srm->ip6_max_frag)
553 nat_ipfix_logging_max_fragments_ip6 (srm->ip6_max_frag,
555 reass->flags |= NAT_REASS_FLAG_MAX_FRAG_DROP;
556 nat_ip6_reass_get_frags_inline (reass, bi_to_drop);
560 clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
562 pool_get (srm->ip6_frags_list_pool, elt);
563 elt_index = elt - srm->ip6_frags_list_pool;
564 clib_dlist_init (srm->ip6_frags_list_pool, elt_index);
566 clib_dlist_addtail (srm->ip6_frags_list_pool,
567 reass->frags_per_reass_list_head_index, elt_index);
570 clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
576 nat_ip6_reass_get_frags (nat_reass_ip6_t * reass, u32 ** bi)
578 nat_reass_main_t *srm = &nat_reass_main;
580 clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
582 nat_ip6_reass_get_frags_inline (reass, bi);
584 clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
588 nat_ip6_reass_walk (nat_ip6_reass_walk_fn_t fn, void *ctx)
590 nat_reass_ip6_t *reass;
591 nat_reass_main_t *srm = &nat_reass_main;
592 f64 now = vlib_time_now (srm->vlib_main);
595 pool_foreach (reass, srm->ip6_reass_pool,
597 if (now < reass->last_heard + (f64) srm->ip4_timeout)
607 nat_reass_init (vlib_main_t * vm)
609 nat_reass_main_t *srm = &nat_reass_main;
610 vlib_thread_main_t *tm = vlib_get_thread_main ();
611 clib_error_t *error = 0;
613 u32 nbuckets, head_index;
616 srm->vnet_main = vnet_get_main ();
619 srm->ip4_timeout = NAT_REASS_TIMEOUT_DEFAULT;
620 srm->ip4_max_reass = NAT_MAX_REASS_DEAFULT;
621 srm->ip4_max_frag = NAT_MAX_FRAG_DEFAULT;
622 srm->ip4_drop_frag = 0;
623 srm->ip4_reass_n = 0;
625 if (tm->n_vlib_mains > 1)
626 clib_spinlock_init (&srm->ip4_reass_lock);
628 pool_alloc (srm->ip4_reass_pool, srm->ip4_max_reass);
630 nbuckets = nat_reass_get_nbuckets (0);
631 clib_bihash_init_16_8 (&srm->ip4_reass_hash, "nat-ip4-reass", nbuckets,
634 pool_get (srm->ip4_reass_lru_list_pool, head);
635 srm->ip4_reass_head_index = head_index =
636 head - srm->ip4_reass_lru_list_pool;
637 clib_dlist_init (srm->ip4_reass_lru_list_pool, head_index);
640 srm->ip6_timeout = NAT_REASS_TIMEOUT_DEFAULT;
641 srm->ip6_max_reass = NAT_MAX_REASS_DEAFULT;
642 srm->ip6_max_frag = NAT_MAX_FRAG_DEFAULT;
643 srm->ip6_drop_frag = 0;
644 srm->ip6_reass_n = 0;
646 if (tm->n_vlib_mains > 1)
647 clib_spinlock_init (&srm->ip6_reass_lock);
649 pool_alloc (srm->ip6_reass_pool, srm->ip6_max_reass);
651 nbuckets = nat_reass_get_nbuckets (1);
652 clib_bihash_init_48_8 (&srm->ip6_reass_hash, "nat-ip6-reass", nbuckets,
655 pool_get (srm->ip6_reass_lru_list_pool, head);
656 srm->ip6_reass_head_index = head_index =
657 head - srm->ip6_reass_lru_list_pool;
658 clib_dlist_init (srm->ip6_reass_lru_list_pool, head_index);
663 static clib_error_t *
664 nat_reass_command_fn (vlib_main_t * vm, unformat_input_t * input,
665 vlib_cli_command_t * cmd)
667 clib_error_t *error = 0;
668 unformat_input_t _line_input, *line_input = &_line_input;
669 u32 timeout = 0, max_reass = 0, max_frag = 0;
670 u8 drop_frag = (u8) ~ 0, is_ip6 = 0;
673 /* Get a line of input. */
674 if (!unformat_user (input, unformat_line_input, line_input))
677 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
679 if (unformat (line_input, "max-reassemblies %u", &max_reass))
681 else if (unformat (line_input, "max-fragments %u", &max_frag))
683 else if (unformat (line_input, "timeout %u", &timeout))
685 else if (unformat (line_input, "enable"))
687 else if (unformat (line_input, "disable"))
689 else if (unformat (line_input, "ip4"))
691 else if (unformat (line_input, "ip6"))
695 error = clib_error_return (0, "unknown input '%U'",
696 format_unformat_error, line_input);
702 timeout = nat_reass_get_timeout (is_ip6);
704 max_reass = nat_reass_get_max_reass (is_ip6);
706 max_frag = nat_reass_get_max_frag (is_ip6);
707 if (drop_frag == (u8) ~ 0)
708 drop_frag = nat_reass_is_drop_frag (is_ip6);
711 nat_reass_set (timeout, (u16) max_reass, (u8) max_frag, drop_frag,
715 error = clib_error_return (0, "nat_set_reass return %d", rv);
720 unformat_free (line_input);
726 nat_ip4_reass_walk_cli (nat_reass_ip4_t * reass, void *ctx)
728 vlib_main_t *vm = ctx;
730 const char *classify_next_str;
732 if (reass->flags & NAT_REASS_FLAG_MAX_FRAG_DROP)
733 flags_str = format (flags_str, "MAX_FRAG_DROP");
734 if (reass->flags & NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE)
737 flags_str = format (flags_str, " | ");
738 flags_str = format (flags_str, "CLASSIFY_ED_CONTINUE");
740 if (reass->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
743 flags_str = format (flags_str, " | ");
744 flags_str = format (flags_str, "CLASSIFY_ED_DONT_TRANSLATE");
747 flags_str = format (flags_str, "0");
748 flags_str = format (flags_str, "%c", 0);
750 switch (reass->classify_next)
752 case NAT_REASS_IP4_CLASSIFY_NONE:
753 classify_next_str = "NONE";
755 case NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT:
756 classify_next_str = "IN2OUT";
758 case NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN:
759 classify_next_str = "OUT2IN";
762 classify_next_str = "invalid value";
765 vlib_cli_output (vm, " src %U dst %U proto %u id 0x%04x cached %u "
766 "flags %s classify_next %s",
767 format_ip4_address, &reass->key.src,
768 format_ip4_address, &reass->key.dst,
770 clib_net_to_host_u16 (reass->key.frag_id), reass->frag_n,
771 flags_str, classify_next_str);
773 vec_free (flags_str);
779 nat_ip6_reass_walk_cli (nat_reass_ip6_t * reass, void *ctx)
781 vlib_main_t *vm = ctx;
783 vlib_cli_output (vm, " src %U dst %U proto %u id 0x%08x cached %u",
784 format_ip6_address, &reass->key.src,
785 format_ip6_address, &reass->key.dst,
787 clib_net_to_host_u32 (reass->key.frag_id), reass->frag_n);
792 static clib_error_t *
793 show_nat_reass_command_fn (vlib_main_t * vm, unformat_input_t * input,
794 vlib_cli_command_t * cmd)
796 vlib_cli_output (vm, "NAT IPv4 virtual fragmentation reassembly is %s",
797 nat_reass_is_drop_frag (0) ? "DISABLED" : "ENABLED");
798 vlib_cli_output (vm, " max-reassemblies %u", nat_reass_get_max_reass (0));
799 vlib_cli_output (vm, " max-fragments %u", nat_reass_get_max_frag (0));
800 vlib_cli_output (vm, " timeout %usec", nat_reass_get_timeout (0));
801 vlib_cli_output (vm, " reassemblies:");
802 nat_ip4_reass_walk (nat_ip4_reass_walk_cli, vm);
804 vlib_cli_output (vm, "NAT IPv6 virtual fragmentation reassembly is %s",
805 nat_reass_is_drop_frag (1) ? "DISABLED" : "ENABLED");
806 vlib_cli_output (vm, " max-reassemblies %u", nat_reass_get_max_reass (1));
807 vlib_cli_output (vm, " max-fragments %u", nat_reass_get_max_frag (1));
808 vlib_cli_output (vm, " timeout %usec", nat_reass_get_timeout (1));
809 vlib_cli_output (vm, " reassemblies:");
810 nat_ip6_reass_walk (nat_ip6_reass_walk_cli, vm);
816 VLIB_CLI_COMMAND (nat_reass_command, static) =
818 .path = "nat virtual-reassembly",
819 .short_help = "nat virtual-reassembly ip4|ip6 [max-reassemblies <n>] "
820 "[max-fragments <n>] [timeout <sec>] [enable|disable]",
821 .function = nat_reass_command_fn,
824 VLIB_CLI_COMMAND (show_nat_reass_command, static) =
826 .path = "show nat virtual-reassembly",
827 .short_help = "show nat virtual-reassembly",
828 .function = show_nat_reass_command_fn,
833 * fd.io coding-style-patch-verification: ON
836 * eval: (c-set-style "gnu")