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 clib_warning ("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 if (clib_bihash_add_del_16_8 (&srm->ip4_reass_hash, &kv, 1))
331 clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
336 nat_ip4_reass_add_fragment (nat_reass_ip4_t * reass, u32 bi,
339 nat_reass_main_t *srm = &nat_reass_main;
343 if (reass->frag_n >= srm->ip4_max_frag)
345 nat_ipfix_logging_max_fragments_ip4 (srm->ip4_max_frag,
347 reass->flags |= NAT_REASS_FLAG_MAX_FRAG_DROP;
348 nat_ip4_reass_get_frags_inline (reass, bi_to_drop);
352 clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
354 pool_get (srm->ip4_frags_list_pool, elt);
355 elt_index = elt - srm->ip4_frags_list_pool;
356 clib_dlist_init (srm->ip4_frags_list_pool, elt_index);
358 clib_dlist_addtail (srm->ip4_frags_list_pool,
359 reass->frags_per_reass_list_head_index, elt_index);
362 clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
368 nat_ip4_reass_get_frags (nat_reass_ip4_t * reass, u32 ** bi)
370 nat_reass_main_t *srm = &nat_reass_main;
372 clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
374 nat_ip4_reass_get_frags_inline (reass, bi);
376 clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
380 nat_ip4_reass_walk (nat_ip4_reass_walk_fn_t fn, void *ctx)
382 nat_reass_ip4_t *reass;
383 nat_reass_main_t *srm = &nat_reass_main;
384 f64 now = vlib_time_now (srm->vlib_main);
387 pool_foreach (reass, srm->ip4_reass_pool,
389 if (now < reass->last_heard + (f64) srm->ip4_timeout)
398 static_always_inline nat_reass_ip6_t *
399 nat_ip6_reass_lookup (nat_reass_ip6_key_t * k, f64 now)
401 nat_reass_main_t *srm = &nat_reass_main;
402 clib_bihash_kv_48_8_t kv, value;
403 nat_reass_ip6_t *reass;
406 kv.key[0] = k->as_u64[0];
407 kv.key[1] = k->as_u64[1];
408 kv.key[2] = k->as_u64[2];
409 kv.key[3] = k->as_u64[3];
410 kv.key[4] = k->as_u64[4];
411 kv.key[5] = k->as_u64[5];
413 if (clib_bihash_search_48_8 (&srm->ip6_reass_hash, &kv, &value))
416 reass = pool_elt_at_index (srm->ip6_reass_pool, value.value);
417 if (now < reass->last_heard + (f64) srm->ip6_timeout)
424 nat_ip6_reass_find_or_create (ip6_address_t src, ip6_address_t dst,
425 u32 frag_id, u8 proto, u8 reset_timeout,
428 nat_reass_main_t *srm = &nat_reass_main;
429 nat_reass_ip6_t *reass = 0;
430 nat_reass_ip6_key_t k;
431 f64 now = vlib_time_now (srm->vlib_main);
432 dlist_elt_t *oldest_elt, *elt;
433 dlist_elt_t *per_reass_list_head_elt;
434 u32 oldest_index, elt_index;
435 clib_bihash_kv_48_8_t kv;
437 k.src.as_u64[0] = src.as_u64[0];
438 k.src.as_u64[1] = src.as_u64[1];
439 k.dst.as_u64[0] = dst.as_u64[0];
440 k.dst.as_u64[1] = dst.as_u64[1];
445 clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
447 reass = nat_ip6_reass_lookup (&k, now);
452 reass->last_heard = now;
453 clib_dlist_remove (srm->ip6_reass_lru_list_pool,
454 reass->lru_list_index);
455 clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
456 srm->ip6_reass_head_index,
457 reass->lru_list_index);
460 if (reass->flags && NAT_REASS_FLAG_MAX_FRAG_DROP)
469 if (srm->ip6_reass_n >= srm->ip6_max_reass)
472 clib_dlist_remove_head (srm->ip6_reass_lru_list_pool,
473 srm->ip6_reass_head_index);
474 ASSERT (oldest_index != ~0);
476 pool_elt_at_index (srm->ip4_reass_lru_list_pool, oldest_index);
477 reass = pool_elt_at_index (srm->ip6_reass_pool, oldest_elt->value);
478 if (now < reass->last_heard + (f64) srm->ip6_timeout)
480 clib_dlist_addhead (srm->ip6_reass_lru_list_pool,
481 srm->ip6_reass_head_index, oldest_index);
482 clib_warning ("no free resassembly slot");
487 clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
488 srm->ip6_reass_head_index, oldest_index);
490 kv.key[0] = k.as_u64[0];
491 kv.key[1] = k.as_u64[1];
492 kv.key[2] = k.as_u64[2];
493 kv.key[3] = k.as_u64[4];
494 kv.key[4] = k.as_u64[5];
495 if (clib_bihash_add_del_48_8 (&srm->ip6_reass_hash, &kv, 0))
501 nat_ip6_reass_get_frags_inline (reass, bi_to_drop);
505 pool_get (srm->ip6_reass_pool, reass);
506 pool_get (srm->ip6_reass_lru_list_pool, elt);
507 reass->lru_list_index = elt_index = elt - srm->ip6_reass_lru_list_pool;
508 clib_dlist_init (srm->ip6_reass_lru_list_pool, elt_index);
509 elt->value = reass - srm->ip6_reass_pool;
510 clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
511 srm->ip6_reass_head_index, elt_index);
512 pool_get (srm->ip6_frags_list_pool, per_reass_list_head_elt);
513 reass->frags_per_reass_list_head_index =
514 per_reass_list_head_elt - srm->ip6_frags_list_pool;
515 clib_dlist_init (srm->ip6_frags_list_pool,
516 reass->frags_per_reass_list_head_index);
520 reass->key.as_u64[0] = kv.key[0] = k.as_u64[0];
521 reass->key.as_u64[1] = kv.key[1] = k.as_u64[1];
522 reass->key.as_u64[2] = kv.key[2] = k.as_u64[2];
523 reass->key.as_u64[3] = kv.key[3] = k.as_u64[3];
524 reass->key.as_u64[4] = kv.key[4] = k.as_u64[4];
525 reass->key.as_u64[5] = kv.key[5] = k.as_u64[5];
526 kv.value = reass - srm->ip6_reass_pool;
527 reass->sess_index = (u32) ~ 0;
528 reass->last_heard = now;
530 if (clib_bihash_add_del_48_8 (&srm->ip6_reass_hash, &kv, 1))
537 clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
542 nat_ip6_reass_add_fragment (nat_reass_ip6_t * reass, u32 bi,
545 nat_reass_main_t *srm = &nat_reass_main;
549 if (reass->frag_n >= srm->ip6_max_frag)
551 nat_ipfix_logging_max_fragments_ip6 (srm->ip6_max_frag,
553 reass->flags |= NAT_REASS_FLAG_MAX_FRAG_DROP;
554 nat_ip6_reass_get_frags_inline (reass, bi_to_drop);
558 clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
560 pool_get (srm->ip6_frags_list_pool, elt);
561 elt_index = elt - srm->ip6_frags_list_pool;
562 clib_dlist_init (srm->ip6_frags_list_pool, elt_index);
564 clib_dlist_addtail (srm->ip6_frags_list_pool,
565 reass->frags_per_reass_list_head_index, elt_index);
568 clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
574 nat_ip6_reass_get_frags (nat_reass_ip6_t * reass, u32 ** bi)
576 nat_reass_main_t *srm = &nat_reass_main;
578 clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
580 nat_ip6_reass_get_frags_inline (reass, bi);
582 clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
586 nat_ip6_reass_walk (nat_ip6_reass_walk_fn_t fn, void *ctx)
588 nat_reass_ip6_t *reass;
589 nat_reass_main_t *srm = &nat_reass_main;
590 f64 now = vlib_time_now (srm->vlib_main);
593 pool_foreach (reass, srm->ip6_reass_pool,
595 if (now < reass->last_heard + (f64) srm->ip4_timeout)
605 nat_reass_init (vlib_main_t * vm)
607 nat_reass_main_t *srm = &nat_reass_main;
608 vlib_thread_main_t *tm = vlib_get_thread_main ();
609 clib_error_t *error = 0;
611 u32 nbuckets, head_index;
614 srm->vnet_main = vnet_get_main ();
617 srm->ip4_timeout = NAT_REASS_TIMEOUT_DEFAULT;
618 srm->ip4_max_reass = NAT_MAX_REASS_DEAFULT;
619 srm->ip4_max_frag = NAT_MAX_FRAG_DEFAULT;
620 srm->ip4_drop_frag = 0;
621 srm->ip4_reass_n = 0;
623 if (tm->n_vlib_mains > 1)
624 clib_spinlock_init (&srm->ip4_reass_lock);
626 pool_alloc (srm->ip4_reass_pool, srm->ip4_max_reass);
628 nbuckets = nat_reass_get_nbuckets (0);
629 clib_bihash_init_16_8 (&srm->ip4_reass_hash, "nat-ip4-reass", nbuckets,
632 pool_get (srm->ip4_reass_lru_list_pool, head);
633 srm->ip4_reass_head_index = head_index =
634 head - srm->ip4_reass_lru_list_pool;
635 clib_dlist_init (srm->ip4_reass_lru_list_pool, head_index);
638 srm->ip6_timeout = NAT_REASS_TIMEOUT_DEFAULT;
639 srm->ip6_max_reass = NAT_MAX_REASS_DEAFULT;
640 srm->ip6_max_frag = NAT_MAX_FRAG_DEFAULT;
641 srm->ip6_drop_frag = 0;
642 srm->ip6_reass_n = 0;
644 if (tm->n_vlib_mains > 1)
645 clib_spinlock_init (&srm->ip6_reass_lock);
647 pool_alloc (srm->ip6_reass_pool, srm->ip6_max_reass);
649 nbuckets = nat_reass_get_nbuckets (1);
650 clib_bihash_init_48_8 (&srm->ip6_reass_hash, "nat-ip6-reass", nbuckets,
653 pool_get (srm->ip6_reass_lru_list_pool, head);
654 srm->ip6_reass_head_index = head_index =
655 head - srm->ip6_reass_lru_list_pool;
656 clib_dlist_init (srm->ip6_reass_lru_list_pool, head_index);
661 static clib_error_t *
662 nat_reass_command_fn (vlib_main_t * vm, unformat_input_t * input,
663 vlib_cli_command_t * cmd)
665 clib_error_t *error = 0;
666 unformat_input_t _line_input, *line_input = &_line_input;
667 u32 timeout = 0, max_reass = 0, max_frag = 0;
668 u8 drop_frag = (u8) ~ 0, is_ip6 = 0;
671 /* Get a line of input. */
672 if (!unformat_user (input, unformat_line_input, line_input))
675 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
677 if (unformat (line_input, "max-reassemblies %u", &max_reass))
679 else if (unformat (line_input, "max-fragments %u", &max_frag))
681 else if (unformat (line_input, "timeout %u", &timeout))
683 else if (unformat (line_input, "enable"))
685 else if (unformat (line_input, "disable"))
687 else if (unformat (line_input, "ip4"))
689 else if (unformat (line_input, "ip6"))
693 error = clib_error_return (0, "unknown input '%U'",
694 format_unformat_error, line_input);
700 timeout = nat_reass_get_timeout (is_ip6);
702 max_reass = nat_reass_get_max_reass (is_ip6);
704 max_frag = nat_reass_get_max_frag (is_ip6);
705 if (drop_frag == (u8) ~ 0)
706 drop_frag = nat_reass_is_drop_frag (is_ip6);
709 nat_reass_set (timeout, (u16) max_reass, (u8) max_frag, drop_frag,
713 error = clib_error_return (0, "nat_set_reass return %d", rv);
718 unformat_free (line_input);
724 nat_ip4_reass_walk_cli (nat_reass_ip4_t * reass, void *ctx)
726 vlib_main_t *vm = ctx;
728 vlib_cli_output (vm, " src %U dst %U proto %u id 0x%04x cached %u",
729 format_ip4_address, &reass->key.src,
730 format_ip4_address, &reass->key.dst,
732 clib_net_to_host_u16 (reass->key.frag_id), reass->frag_n);
738 nat_ip6_reass_walk_cli (nat_reass_ip6_t * reass, void *ctx)
740 vlib_main_t *vm = ctx;
742 vlib_cli_output (vm, " src %U dst %U proto %u id 0x%08x cached %u",
743 format_ip6_address, &reass->key.src,
744 format_ip6_address, &reass->key.dst,
746 clib_net_to_host_u32 (reass->key.frag_id), reass->frag_n);
751 static clib_error_t *
752 show_nat_reass_command_fn (vlib_main_t * vm, unformat_input_t * input,
753 vlib_cli_command_t * cmd)
755 vlib_cli_output (vm, "NAT IPv4 virtual fragmentation reassembly is %s",
756 nat_reass_is_drop_frag (0) ? "DISABLED" : "ENABLED");
757 vlib_cli_output (vm, " max-reassemblies %u", nat_reass_get_max_reass (0));
758 vlib_cli_output (vm, " max-fragments %u", nat_reass_get_max_frag (0));
759 vlib_cli_output (vm, " timeout %usec", nat_reass_get_timeout (0));
760 vlib_cli_output (vm, " reassemblies:");
761 nat_ip4_reass_walk (nat_ip4_reass_walk_cli, vm);
763 vlib_cli_output (vm, "NAT IPv6 virtual fragmentation reassembly is %s",
764 nat_reass_is_drop_frag (1) ? "DISABLED" : "ENABLED");
765 vlib_cli_output (vm, " max-reassemblies %u", nat_reass_get_max_reass (1));
766 vlib_cli_output (vm, " max-fragments %u", nat_reass_get_max_frag (1));
767 vlib_cli_output (vm, " timeout %usec", nat_reass_get_timeout (1));
768 vlib_cli_output (vm, " reassemblies:");
769 nat_ip6_reass_walk (nat_ip6_reass_walk_cli, vm);
775 VLIB_CLI_COMMAND (nat_reass_command, static) =
777 .path = "nat virtual-reassembly",
778 .short_help = "nat virtual-reassembly ip4|ip6 [max-reassemblies <n>] "
779 "[max-fragments <n>] [timeout <sec>] [enable|disable]",
780 .function = nat_reass_command_fn,
783 VLIB_CLI_COMMAND (show_nat_reass_command, static) =
785 .path = "show nat virtual-reassembly",
786 .short_help = "show nat virtual-reassembly",
787 .function = show_nat_reass_command_fn,
792 * fd.io coding-style-patch-verification: ON
795 * eval: (c-set-style "gnu")