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.
18 * @brief IPv4 Reassembly.
20 * This file contains the source code for IPv4 reassembly.
23 #include <vppinfra/vec.h>
24 #include <vnet/vnet.h>
25 #include <vnet/ip/ip.h>
26 #include <vppinfra/bihash_16_8.h>
27 #include <vnet/ip/ip4_reassembly.h>
29 #define MSEC_PER_SEC 1000
30 #define IP4_REASS_TIMEOUT_DEFAULT_MS 100
31 #define IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
32 #define IP4_REASS_MAX_REASSEMBLIES_DEFAULT 1024
33 #define IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
34 #define IP4_REASS_HT_LOAD_FACTOR (0.75)
36 #define IP4_REASS_DEBUG_BUFFERS 0
37 #if IP4_REASS_DEBUG_BUFFERS
38 #define IP4_REASS_DEBUG_BUFFER(bi, what) \
42 printf (#what "buffer %u", _bi); \
43 vlib_buffer_t *_b = vlib_get_buffer (vm, _bi); \
44 while (_b->flags & VLIB_BUFFER_NEXT_PRESENT) \
46 _bi = _b->next_buffer; \
47 printf ("[%u]", _bi); \
48 _b = vlib_get_buffer (vm, _bi); \
55 #define IP4_REASS_DEBUG_BUFFER(...)
61 IP4_REASS_RC_TOO_MANY_FRAGMENTS,
62 IP4_REASS_RC_INTERNAL_ERROR,
100 clib_bihash_kv_16_8_t kv;
104 ip4_reass_buffer_get_data_offset (vlib_buffer_t * b)
106 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
107 return vnb->ip.reass.range_first - vnb->ip.reass.fragment_first;
111 ip4_reass_buffer_get_data_len (vlib_buffer_t * b)
113 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
114 return clib_min (vnb->ip.reass.range_last, vnb->ip.reass.fragment_last) -
115 (vnb->ip.reass.fragment_first + ip4_reass_buffer_get_data_offset (b)) + 1;
122 // time when last packet was received
124 // internal id of this reassembly
126 // buffer index of first buffer in this reassembly context
128 // last octet of packet, ~0 until fragment without more_fragments arrives
129 u32 last_packet_octet;
130 // length of data collected so far
132 // trace operation counter
133 u32 trace_op_counter;
134 // next index - used by non-feature node
136 // error next index - used by custom apps (~0 if not used)
137 u32 error_next_index;
138 // minimum fragment length for this reassembly - used to estimate MTU
139 u16 min_fragment_length;
140 // number of fragments in this reassembly
149 clib_spinlock_t lock;
150 } ip4_reass_per_thread_t;
157 u32 expire_walk_interval_ms;
158 // maximum number of fragments in one reassembly
160 // maximum number of reassemblies
164 clib_bihash_16_8_t hash;
166 ip4_reass_per_thread_t *per_thread_data;
169 vlib_main_t *vlib_main;
170 vnet_main_t *vnet_main;
172 // node index of ip4-drop node
174 u32 ip4_reass_expire_node_idx;
176 /** Worker handoff */
178 u32 fq_feature_index;
182 extern ip4_reass_main_t ip4_reass_main;
184 #ifndef CLIB_MARCH_VARIANT
185 ip4_reass_main_t ip4_reass_main;
186 #endif /* CLIB_MARCH_VARIANT */
190 IP4_REASSEMBLY_NEXT_INPUT,
191 IP4_REASSEMBLY_NEXT_DROP,
192 IP4_REASSEMBLY_NEXT_HANDOFF,
193 IP4_REASSEMBLY_N_NEXT,
203 } ip4_reass_trace_operation_e;
213 } ip4_reass_range_trace_t;
217 ip4_reass_trace_operation_e action;
219 ip4_reass_range_trace_t trace_range;
227 extern vlib_node_registration_t ip4_reass_node;
228 extern vlib_node_registration_t ip4_reass_node_feature;
231 ip4_reass_trace_details (vlib_main_t * vm, u32 bi,
232 ip4_reass_range_trace_t * trace)
234 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
235 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
236 trace->range_first = vnb->ip.reass.range_first;
237 trace->range_last = vnb->ip.reass.range_last;
238 trace->data_offset = ip4_reass_buffer_get_data_offset (b);
239 trace->data_len = ip4_reass_buffer_get_data_len (b);
240 trace->range_bi = bi;
244 format_ip4_reass_range_trace (u8 * s, va_list * args)
246 ip4_reass_range_trace_t *trace = va_arg (*args, ip4_reass_range_trace_t *);
247 s = format (s, "range: [%u, %u], off %d, len %u, bi %u", trace->range_first,
248 trace->range_last, trace->data_offset, trace->data_len,
254 format_ip4_reass_trace (u8 * s, va_list * args)
256 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
257 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
258 ip4_reass_trace_t *t = va_arg (*args, ip4_reass_trace_t *);
259 s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
260 u32 indent = format_get_indent (s);
261 s = format (s, "first bi: %u, data len: %u, ip/fragment[%u, %u]",
262 t->trace_range.first_bi, t->total_data_len, t->fragment_first,
267 s = format (s, "\n%Ushrink %U by %u", format_white_space, indent,
268 format_ip4_reass_range_trace, &t->trace_range,
272 s = format (s, "\n%Udiscard %U", format_white_space, indent,
273 format_ip4_reass_range_trace, &t->trace_range);
276 s = format (s, "\n%Unew %U", format_white_space, indent,
277 format_ip4_reass_range_trace, &t->trace_range);
280 s = format (s, "\n%Uoverlapping/ignored %U", format_white_space, indent,
281 format_ip4_reass_range_trace, &t->trace_range);
284 s = format (s, "\n%Ufinalize reassembly", format_white_space, indent);
291 ip4_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
292 ip4_reass_main_t * rm, ip4_reass_t * reass, u32 bi,
293 ip4_reass_trace_operation_e action, u32 size_diff)
295 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
296 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
297 ip4_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
298 t->reass_id = reass->id;
300 ip4_reass_trace_details (vm, bi, &t->trace_range);
301 t->size_diff = size_diff;
302 t->op_id = reass->trace_op_counter;
303 ++reass->trace_op_counter;
304 t->fragment_first = vnb->ip.reass.fragment_first;
305 t->fragment_last = vnb->ip.reass.fragment_last;
306 t->trace_range.first_bi = reass->first_bi;
307 t->total_data_len = reass->data_len;
310 s = format (s, "%U", format_ip4_reass_trace, NULL, NULL, t);
311 printf ("%.*s\n", vec_len (s), s);
313 vec_reset_length (s);
319 ip4_reass_free (ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
322 clib_bihash_kv_16_8_t kv;
323 kv.key[0] = reass->key.as_u64[0];
324 kv.key[1] = reass->key.as_u64[1];
325 clib_bihash_add_del_16_8 (&rm->hash, &kv, 0);
326 pool_put (rt->pool, reass);
331 ip4_reass_drop_all (vlib_main_t * vm, vlib_node_runtime_t * node,
332 ip4_reass_main_t * rm, ip4_reass_t * reass)
334 u32 range_bi = reass->first_bi;
335 vlib_buffer_t *range_b;
336 vnet_buffer_opaque_t *range_vnb;
338 while (~0 != range_bi)
340 range_b = vlib_get_buffer (vm, range_bi);
341 range_vnb = vnet_buffer (range_b);
345 vec_add1 (to_free, bi);
346 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
347 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
350 b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
357 range_bi = range_vnb->ip.reass.next_range_bi;
359 /* send to next_error_index */
360 if (~0 != reass->error_next_index)
362 u32 n_left_to_next, *to_next, next_index;
364 next_index = reass->error_next_index;
367 while (vec_len (to_free) > 0)
369 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
371 while (vec_len (to_free) > 0 && n_left_to_next > 0)
373 bi = vec_pop (to_free);
380 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
381 to_next, n_left_to_next,
385 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
390 vlib_buffer_free (vm, to_free, vec_len (to_free));
395 ip4_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
396 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
397 ip4_reass_kv_t * kv, u8 * do_handoff)
399 ip4_reass_t *reass = NULL;
400 f64 now = vlib_time_now (rm->vlib_main);
402 if (!clib_bihash_search_16_8
403 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, (clib_bihash_kv_16_8_t *) kv))
405 if (vm->thread_index != kv->v.thread_index)
410 reass = pool_elt_at_index (rt->pool, kv->v.reass_index);
412 if (now > reass->last_heard + rm->timeout)
414 ip4_reass_drop_all (vm, node, rm, reass);
415 ip4_reass_free (rm, rt, reass);
422 reass->last_heard = now;
426 if (rt->reass_n >= rm->max_reass_n)
433 pool_get (rt->pool, reass);
434 clib_memset (reass, 0, sizeof (*reass));
435 reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
437 reass->first_bi = ~0;
438 reass->last_packet_octet = ~0;
440 reass->next_index = ~0;
441 reass->error_next_index = ~0;
445 reass->key.as_u64[0] = ((clib_bihash_kv_16_8_t *) kv)->key[0];
446 reass->key.as_u64[1] = ((clib_bihash_kv_16_8_t *) kv)->key[1];
447 kv->v.reass_index = (reass - rt->pool);
448 kv->v.thread_index = vm->thread_index;
449 reass->last_heard = now;
451 if (clib_bihash_add_del_16_8 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, 1))
453 ip4_reass_free (rm, rt, reass);
460 always_inline ip4_reass_rc_t
461 ip4_reass_finalize (vlib_main_t * vm, vlib_node_runtime_t * node,
462 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
463 ip4_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
466 vlib_buffer_t *first_b = vlib_get_buffer (vm, reass->first_bi);
467 vlib_buffer_t *last_b = NULL;
468 u32 sub_chain_bi = reass->first_bi;
469 u32 total_length = 0;
473 u32 tmp_bi = sub_chain_bi;
474 vlib_buffer_t *tmp = vlib_get_buffer (vm, tmp_bi);
475 ip4_header_t *ip = vlib_buffer_get_current (tmp);
476 vnet_buffer_opaque_t *vnb = vnet_buffer (tmp);
477 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
478 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
480 return IP4_REASS_RC_INTERNAL_ERROR;
483 u32 data_len = ip4_reass_buffer_get_data_len (tmp);
485 ip4_header_bytes (ip) + ip4_reass_buffer_get_data_offset (tmp);
487 vlib_buffer_length_in_chain (vm, tmp) - trim_front - data_len;
488 if (tmp_bi == reass->first_bi)
490 /* first buffer - keep ip4 header */
491 if (0 != ip4_reass_buffer_get_data_offset (tmp))
493 return IP4_REASS_RC_INTERNAL_ERROR;
496 trim_end = vlib_buffer_length_in_chain (vm, tmp) - data_len -
497 ip4_header_bytes (ip);
498 if (!(vlib_buffer_length_in_chain (vm, tmp) - trim_end > 0))
500 return IP4_REASS_RC_INTERNAL_ERROR;
504 vlib_buffer_length_in_chain (vm, tmp) - trim_front - trim_end;
510 if (trim_front > tmp->current_length)
512 /* drop whole buffer */
513 u32 to_be_freed_bi = tmp_bi;
514 trim_front -= tmp->current_length;
515 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
517 return IP4_REASS_RC_INTERNAL_ERROR;
519 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
520 tmp_bi = tmp->next_buffer;
521 tmp->next_buffer = 0;
522 tmp = vlib_get_buffer (vm, tmp_bi);
523 vlib_buffer_free_one (vm, to_be_freed_bi);
528 vlib_buffer_advance (tmp, trim_front);
536 last_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
537 last_b->next_buffer = tmp_bi;
540 if (keep_data <= tmp->current_length)
542 tmp->current_length = keep_data;
547 keep_data -= tmp->current_length;
548 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
550 return IP4_REASS_RC_INTERNAL_ERROR;
553 total_length += tmp->current_length;
554 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
556 tmp_bi = tmp->next_buffer;
557 tmp = vlib_get_buffer (vm, tmp->next_buffer);
566 u32 to_be_freed_bi = tmp_bi;
567 if (reass->first_bi == tmp_bi)
569 return IP4_REASS_RC_INTERNAL_ERROR;
571 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
573 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
574 tmp_bi = tmp->next_buffer;
575 tmp->next_buffer = 0;
576 tmp = vlib_get_buffer (vm, tmp_bi);
577 vlib_buffer_free_one (vm, to_be_freed_bi);
581 tmp->next_buffer = 0;
582 vlib_buffer_free_one (vm, to_be_freed_bi);
588 vnet_buffer (vlib_get_buffer (vm, sub_chain_bi))->ip.
591 while (~0 != sub_chain_bi);
595 return IP4_REASS_RC_INTERNAL_ERROR;
597 last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
599 if (total_length < first_b->current_length)
601 return IP4_REASS_RC_INTERNAL_ERROR;
603 total_length -= first_b->current_length;
604 first_b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
605 first_b->total_length_not_including_first_buffer = total_length;
606 ip4_header_t *ip = vlib_buffer_get_current (first_b);
607 ip->flags_and_fragment_offset = 0;
608 ip->length = clib_host_to_net_u16 (first_b->current_length + total_length);
609 ip->checksum = ip4_header_checksum (ip);
610 if (!vlib_buffer_chain_linearize (vm, first_b))
612 return IP4_REASS_RC_NO_BUF;
614 // reset to reconstruct the mbuf linking
615 first_b->flags &= ~VLIB_BUFFER_EXT_HDR_VALID;
616 if (PREDICT_FALSE (first_b->flags & VLIB_BUFFER_IS_TRACED))
618 ip4_reass_add_trace (vm, node, rm, reass, reass->first_bi, FINALIZE, 0);
620 // following code does a hexdump of packet fragments to stdout ...
623 u32 bi = reass->first_bi;
627 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
628 s = format (s, "%u: %U\n", bi, format_hexdump,
629 vlib_buffer_get_current (b), b->current_length);
630 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
639 printf ("%.*s\n", vec_len (s), s);
646 *bi0 = reass->first_bi;
649 *next0 = IP4_REASSEMBLY_NEXT_INPUT;
653 *next0 = reass->next_index;
655 vnet_buffer (first_b)->ip.reass.estimated_mtu = reass->min_fragment_length;
656 *error0 = IP4_ERROR_NONE;
657 ip4_reass_free (rm, rt, reass);
659 return IP4_REASS_RC_OK;
662 always_inline ip4_reass_rc_t
663 ip4_reass_insert_range_in_chain (vlib_main_t * vm,
664 ip4_reass_main_t * rm,
665 ip4_reass_per_thread_t * rt,
667 u32 prev_range_bi, u32 new_next_bi)
669 vlib_buffer_t *new_next_b = vlib_get_buffer (vm, new_next_bi);
670 vnet_buffer_opaque_t *new_next_vnb = vnet_buffer (new_next_b);
671 if (~0 != prev_range_bi)
673 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
674 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
675 new_next_vnb->ip.reass.next_range_bi = prev_vnb->ip.reass.next_range_bi;
676 prev_vnb->ip.reass.next_range_bi = new_next_bi;
680 if (~0 != reass->first_bi)
682 new_next_vnb->ip.reass.next_range_bi = reass->first_bi;
684 reass->first_bi = new_next_bi;
686 vnet_buffer_opaque_t *vnb = vnet_buffer (new_next_b);
687 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
688 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
690 return IP4_REASS_RC_INTERNAL_ERROR;
692 reass->data_len += ip4_reass_buffer_get_data_len (new_next_b);
693 return IP4_REASS_RC_OK;
696 always_inline ip4_reass_rc_t
697 ip4_reass_remove_range_from_chain (vlib_main_t * vm,
698 vlib_node_runtime_t * node,
699 ip4_reass_main_t * rm,
700 ip4_reass_t * reass, u32 prev_range_bi,
703 vlib_buffer_t *discard_b = vlib_get_buffer (vm, discard_bi);
704 vnet_buffer_opaque_t *discard_vnb = vnet_buffer (discard_b);
705 if (~0 != prev_range_bi)
707 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
708 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
709 if (!(prev_vnb->ip.reass.next_range_bi == discard_bi))
711 return IP4_REASS_RC_INTERNAL_ERROR;
713 prev_vnb->ip.reass.next_range_bi = discard_vnb->ip.reass.next_range_bi;
717 reass->first_bi = discard_vnb->ip.reass.next_range_bi;
719 vnet_buffer_opaque_t *vnb = vnet_buffer (discard_b);
720 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
721 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
723 return IP4_REASS_RC_INTERNAL_ERROR;
725 reass->data_len -= ip4_reass_buffer_get_data_len (discard_b);
728 u32 to_be_freed_bi = discard_bi;
729 if (PREDICT_FALSE (discard_b->flags & VLIB_BUFFER_IS_TRACED))
731 ip4_reass_add_trace (vm, node, rm, reass, discard_bi, RANGE_DISCARD,
734 if (discard_b->flags & VLIB_BUFFER_NEXT_PRESENT)
736 discard_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
737 discard_bi = discard_b->next_buffer;
738 discard_b->next_buffer = 0;
739 discard_b = vlib_get_buffer (vm, discard_bi);
740 vlib_buffer_free_one (vm, to_be_freed_bi);
744 discard_b->next_buffer = 0;
745 vlib_buffer_free_one (vm, to_be_freed_bi);
749 return IP4_REASS_RC_OK;
752 always_inline ip4_reass_rc_t
753 ip4_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
754 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
755 ip4_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
758 ip4_reass_rc_t rc = IP4_REASS_RC_OK;
760 vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0);
761 ip4_header_t *fip = vlib_buffer_get_current (fb);
762 vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
765 // store (error_)next_index before it's overwritten
766 reass->next_index = fvnb->ip.reass.next_index;
767 reass->error_next_index = fvnb->ip.reass.error_next_index;
769 const u32 fragment_first = ip4_get_fragment_offset_bytes (fip);
770 const u32 fragment_length =
771 clib_net_to_host_u16 (fip->length) - ip4_header_bytes (fip);
772 const u32 fragment_last = fragment_first + fragment_length - 1;
773 fvnb->ip.reass.fragment_first = fragment_first;
774 fvnb->ip.reass.fragment_last = fragment_last;
775 int more_fragments = ip4_get_fragment_more (fip);
776 u32 candidate_range_bi = reass->first_bi;
777 u32 prev_range_bi = ~0;
778 fvnb->ip.reass.range_first = fragment_first;
779 fvnb->ip.reass.range_last = fragment_last;
780 fvnb->ip.reass.next_range_bi = ~0;
783 reass->last_packet_octet = fragment_last;
785 if (~0 == reass->first_bi)
787 // starting a new reassembly
789 ip4_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
791 if (IP4_REASS_RC_OK != rc)
795 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
797 ip4_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0);
800 reass->min_fragment_length = clib_net_to_host_u16 (fip->length);
801 reass->fragments_n = 1;
802 return IP4_REASS_RC_OK;
804 reass->min_fragment_length = clib_min (clib_net_to_host_u16 (fip->length),
805 fvnb->ip.reass.estimated_mtu);
806 while (~0 != candidate_range_bi)
808 vlib_buffer_t *candidate_b = vlib_get_buffer (vm, candidate_range_bi);
809 vnet_buffer_opaque_t *candidate_vnb = vnet_buffer (candidate_b);
810 if (fragment_first > candidate_vnb->ip.reass.range_last)
812 // this fragments starts after candidate range
813 prev_range_bi = candidate_range_bi;
814 candidate_range_bi = candidate_vnb->ip.reass.next_range_bi;
815 if (candidate_vnb->ip.reass.range_last < fragment_last &&
816 ~0 == candidate_range_bi)
818 // special case - this fragment falls beyond all known ranges
820 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
821 prev_range_bi, *bi0);
822 if (IP4_REASS_RC_OK != rc)
831 if (fragment_last < candidate_vnb->ip.reass.range_first)
833 // this fragment ends before candidate range without any overlap
835 ip4_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
837 if (IP4_REASS_RC_OK != rc)
845 if (fragment_first >= candidate_vnb->ip.reass.range_first &&
846 fragment_last <= candidate_vnb->ip.reass.range_last)
848 // this fragment is a (sub)part of existing range, ignore it
849 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
851 ip4_reass_add_trace (vm, node, rm, reass, *bi0,
856 int discard_candidate = 0;
857 if (fragment_first < candidate_vnb->ip.reass.range_first)
860 fragment_last - candidate_vnb->ip.reass.range_first + 1;
861 if (overlap < ip4_reass_buffer_get_data_len (candidate_b))
863 candidate_vnb->ip.reass.range_first += overlap;
864 if (reass->data_len < overlap)
866 return IP4_REASS_RC_INTERNAL_ERROR;
868 reass->data_len -= overlap;
869 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
871 ip4_reass_add_trace (vm, node, rm, reass,
872 candidate_range_bi, RANGE_SHRINK,
876 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
877 prev_range_bi, *bi0);
878 if (IP4_REASS_RC_OK != rc)
886 discard_candidate = 1;
889 else if (fragment_last > candidate_vnb->ip.reass.range_last)
892 candidate_vnb->ip.reass.range_last - fragment_first + 1;
893 if (overlap < ip4_reass_buffer_get_data_len (candidate_b))
895 fvnb->ip.reass.range_first += overlap;
896 if (~0 != candidate_vnb->ip.reass.next_range_bi)
898 prev_range_bi = candidate_range_bi;
900 candidate_vnb->ip.reass.next_range_bi;
905 // special case - last range discarded
907 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
910 if (IP4_REASS_RC_OK != rc)
919 discard_candidate = 1;
924 discard_candidate = 1;
926 if (discard_candidate)
928 u32 next_range_bi = candidate_vnb->ip.reass.next_range_bi;
929 // discard candidate range, probe next range
931 ip4_reass_remove_range_from_chain (vm, node, rm, reass,
934 if (IP4_REASS_RC_OK != rc)
938 if (~0 != next_range_bi)
940 candidate_range_bi = next_range_bi;
945 // special case - last range discarded
947 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
948 prev_range_bi, *bi0);
949 if (IP4_REASS_RC_OK != rc)
959 ++reass->fragments_n;
962 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
964 ip4_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0);
967 if (~0 != reass->last_packet_octet &&
968 reass->data_len == reass->last_packet_octet + 1)
970 return ip4_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0,
978 if (reass->fragments_n > rm->max_reass_len)
980 rc = IP4_REASS_RC_TOO_MANY_FRAGMENTS;
985 *next0 = IP4_REASSEMBLY_NEXT_DROP;
986 *error0 = IP4_ERROR_REASS_DUPLICATE_FRAGMENT;
993 ip4_reassembly_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
994 vlib_frame_t * frame, bool is_feature,
997 u32 *from = vlib_frame_vector_args (frame);
998 u32 n_left_from, n_left_to_next, *to_next, next_index;
999 ip4_reass_main_t *rm = &ip4_reass_main;
1000 ip4_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
1001 clib_spinlock_lock (&rt->lock);
1003 n_left_from = frame->n_vectors;
1004 next_index = node->cached_next_index;
1005 while (n_left_from > 0)
1007 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1009 while (n_left_from > 0 && n_left_to_next > 0)
1014 u32 error0 = IP4_ERROR_NONE;
1017 b0 = vlib_get_buffer (vm, bi0);
1019 ip4_header_t *ip0 = vlib_buffer_get_current (b0);
1020 if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0))
1022 // this is a whole packet - no fragmentation
1025 next0 = IP4_REASSEMBLY_NEXT_INPUT;
1029 next0 = vnet_buffer (b0)->ip.reass.next_index;
1034 const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
1035 const u32 fragment_length =
1036 clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0);
1037 const u32 fragment_last = fragment_first + fragment_length - 1;
1038 if (fragment_first > fragment_last || fragment_first + fragment_length > UINT16_MAX - 20 || (fragment_length < 8 && ip4_get_fragment_more (ip0))) // 8 is minimum frag length per RFC 791
1040 next0 = IP4_REASSEMBLY_NEXT_DROP;
1041 error0 = IP4_ERROR_REASS_MALFORMED_PACKET;
1049 (u64) vec_elt (ip4_main.fib_index_by_sw_if_index,
1050 vnet_buffer (b0)->sw_if_index[VLIB_RX]) |
1051 (u64) ip0->src_address.as_u32 << 32;
1053 (u64) ip0->dst_address.as_u32 |
1054 (u64) ip0->fragment_id << 32 | (u64) ip0->protocol << 48;
1056 ip4_reass_t *reass =
1057 ip4_reass_find_or_create (vm, node, rm, rt, &kv,
1060 if (PREDICT_FALSE (do_handoff))
1062 next0 = IP4_REASSEMBLY_NEXT_HANDOFF;
1064 vnet_buffer (b0)->ip.
1065 reass.owner_feature_thread_index =
1068 vnet_buffer (b0)->ip.reass.owner_thread_index =
1073 switch (ip4_reass_update
1074 (vm, node, rm, rt, reass, &bi0, &next0,
1075 &error0, is_custom_app))
1077 case IP4_REASS_RC_OK:
1078 /* nothing to do here */
1080 case IP4_REASS_RC_TOO_MANY_FRAGMENTS:
1081 vlib_node_increment_counter (vm, node->node_index,
1082 IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
1084 ip4_reass_drop_all (vm, node, rm, reass);
1085 ip4_reass_free (rm, rt, reass);
1088 case IP4_REASS_RC_NO_BUF:
1089 vlib_node_increment_counter (vm, node->node_index,
1090 IP4_ERROR_REASS_NO_BUF,
1092 ip4_reass_drop_all (vm, node, rm, reass);
1093 ip4_reass_free (rm, rt, reass);
1096 case IP4_REASS_RC_INTERNAL_ERROR:
1097 /* drop everything and start with a clean slate */
1098 vlib_node_increment_counter (vm, node->node_index,
1099 IP4_ERROR_REASS_INTERNAL_ERROR,
1101 ip4_reass_drop_all (vm, node, rm, reass);
1102 ip4_reass_free (rm, rt, reass);
1109 next0 = IP4_REASSEMBLY_NEXT_DROP;
1110 error0 = IP4_ERROR_REASS_LIMIT_REACHED;
1114 b0->error = node->errors[error0];
1121 n_left_to_next -= 1;
1122 if (is_feature && IP4_ERROR_NONE == error0)
1124 b0 = vlib_get_buffer (vm, bi0);
1125 vnet_feature_next (&next0, b0);
1127 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1128 to_next, n_left_to_next,
1130 IP4_REASS_DEBUG_BUFFER (bi0, enqueue_next);
1138 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1141 clib_spinlock_unlock (&rt->lock);
1142 return frame->n_vectors;
1145 static char *ip4_reassembly_error_strings[] = {
1146 #define _(sym, string) string,
1151 VLIB_NODE_FN (ip4_reass_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1152 vlib_frame_t * frame)
1154 return ip4_reassembly_inline (vm, node, frame, false /* is_feature */ ,
1155 false /* is_custom_app */ );
1159 VLIB_REGISTER_NODE (ip4_reass_node) = {
1160 .name = "ip4-reassembly",
1161 .vector_size = sizeof (u32),
1162 .format_trace = format_ip4_reass_trace,
1163 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1164 .error_strings = ip4_reassembly_error_strings,
1165 .n_next_nodes = IP4_REASSEMBLY_N_NEXT,
1168 [IP4_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1169 [IP4_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1170 [IP4_REASSEMBLY_NEXT_HANDOFF] = "ip4-reassembly-handoff",
1176 VLIB_NODE_FN (ip4_reass_node_feature) (vlib_main_t * vm,
1177 vlib_node_runtime_t * node,
1178 vlib_frame_t * frame)
1180 return ip4_reassembly_inline (vm, node, frame, true /* is_feature */ ,
1181 false /* is_custom_app */ );
1185 VLIB_REGISTER_NODE (ip4_reass_node_feature) = {
1186 .name = "ip4-reassembly-feature",
1187 .vector_size = sizeof (u32),
1188 .format_trace = format_ip4_reass_trace,
1189 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1190 .error_strings = ip4_reassembly_error_strings,
1191 .n_next_nodes = IP4_REASSEMBLY_N_NEXT,
1194 [IP4_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1195 [IP4_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1196 [IP4_REASSEMBLY_NEXT_HANDOFF] = "ip4-reass-feature-hoff",
1202 VNET_FEATURE_INIT (ip4_reassembly_feature, static) = {
1203 .arc_name = "ip4-unicast",
1204 .node_name = "ip4-reassembly-feature",
1205 .runs_before = VNET_FEATURES ("ip4-lookup",
1206 "ipsec4-input-feature"),
1211 #ifndef CLIB_MARCH_VARIANT
1213 ip4_reass_get_nbuckets ()
1215 ip4_reass_main_t *rm = &ip4_reass_main;
1219 nbuckets = (u32) (rm->max_reass_n / IP4_REASS_HT_LOAD_FACTOR);
1221 for (i = 0; i < 31; i++)
1222 if ((1 << i) >= nbuckets)
1228 #endif /* CLIB_MARCH_VARIANT */
1232 IP4_EVENT_CONFIG_CHANGED = 1,
1233 } ip4_reass_event_t;
1238 clib_bihash_16_8_t *new_hash;
1239 } ip4_rehash_cb_ctx;
1241 #ifndef CLIB_MARCH_VARIANT
1243 ip4_rehash_cb (clib_bihash_kv_16_8_t * kv, void *_ctx)
1245 ip4_rehash_cb_ctx *ctx = _ctx;
1246 if (clib_bihash_add_del_16_8 (ctx->new_hash, kv, 1))
1253 ip4_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
1254 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1256 ip4_reass_main.timeout_ms = timeout_ms;
1257 ip4_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
1258 ip4_reass_main.max_reass_n = max_reassemblies;
1259 ip4_reass_main.max_reass_len = max_reassembly_length;
1260 ip4_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
1264 ip4_reass_set (u32 timeout_ms, u32 max_reassemblies,
1265 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1267 u32 old_nbuckets = ip4_reass_get_nbuckets ();
1268 ip4_reass_set_params (timeout_ms, max_reassemblies, max_reassembly_length,
1269 expire_walk_interval_ms);
1270 vlib_process_signal_event (ip4_reass_main.vlib_main,
1271 ip4_reass_main.ip4_reass_expire_node_idx,
1272 IP4_EVENT_CONFIG_CHANGED, 0);
1273 u32 new_nbuckets = ip4_reass_get_nbuckets ();
1274 if (ip4_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
1276 clib_bihash_16_8_t new_hash;
1277 clib_memset (&new_hash, 0, sizeof (new_hash));
1278 ip4_rehash_cb_ctx ctx;
1280 ctx.new_hash = &new_hash;
1281 clib_bihash_init_16_8 (&new_hash, "ip4-reass", new_nbuckets,
1282 new_nbuckets * 1024);
1283 clib_bihash_foreach_key_value_pair_16_8 (&ip4_reass_main.hash,
1284 ip4_rehash_cb, &ctx);
1287 clib_bihash_free_16_8 (&new_hash);
1292 clib_bihash_free_16_8 (&ip4_reass_main.hash);
1293 clib_memcpy_fast (&ip4_reass_main.hash, &new_hash,
1294 sizeof (ip4_reass_main.hash));
1295 clib_bihash_copied (&ip4_reass_main.hash, &new_hash);
1302 ip4_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
1303 u32 * max_reassembly_length, u32 * expire_walk_interval_ms)
1305 *timeout_ms = ip4_reass_main.timeout_ms;
1306 *max_reassemblies = ip4_reass_main.max_reass_n;
1307 *max_reassembly_length = ip4_reass_main.max_reass_len;
1308 *expire_walk_interval_ms = ip4_reass_main.expire_walk_interval_ms;
1312 static clib_error_t *
1313 ip4_reass_init_function (vlib_main_t * vm)
1315 ip4_reass_main_t *rm = &ip4_reass_main;
1316 clib_error_t *error = 0;
1321 rm->vnet_main = vnet_get_main ();
1323 vec_validate (rm->per_thread_data, vlib_num_workers ());
1324 ip4_reass_per_thread_t *rt;
1325 vec_foreach (rt, rm->per_thread_data)
1327 clib_spinlock_init (&rt->lock);
1328 pool_alloc (rt->pool, rm->max_reass_n);
1331 node = vlib_get_node_by_name (vm, (u8 *) "ip4-reassembly-expire-walk");
1333 rm->ip4_reass_expire_node_idx = node->index;
1335 ip4_reass_set_params (IP4_REASS_TIMEOUT_DEFAULT_MS,
1336 IP4_REASS_MAX_REASSEMBLIES_DEFAULT,
1337 IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
1338 IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
1340 nbuckets = ip4_reass_get_nbuckets ();
1341 clib_bihash_init_16_8 (&rm->hash, "ip4-reass", nbuckets, nbuckets * 1024);
1343 node = vlib_get_node_by_name (vm, (u8 *) "ip4-drop");
1345 rm->ip4_drop_idx = node->index;
1347 rm->fq_index = vlib_frame_queue_main_init (ip4_reass_node.index, 0);
1348 rm->fq_feature_index =
1349 vlib_frame_queue_main_init (ip4_reass_node_feature.index, 0);
1355 VLIB_INIT_FUNCTION (ip4_reass_init_function);
1356 #endif /* CLIB_MARCH_VARIANT */
1359 ip4_reass_walk_expired (vlib_main_t * vm,
1360 vlib_node_runtime_t * node, vlib_frame_t * f)
1362 ip4_reass_main_t *rm = &ip4_reass_main;
1363 uword event_type, *event_data = 0;
1367 vlib_process_wait_for_event_or_clock (vm,
1369 rm->expire_walk_interval_ms /
1370 (f64) MSEC_PER_SEC);
1371 event_type = vlib_process_get_events (vm, &event_data);
1375 case ~0: /* no events => timeout */
1376 /* nothing to do here */
1378 case IP4_EVENT_CONFIG_CHANGED:
1381 clib_warning ("BUG: event type 0x%wx", event_type);
1384 f64 now = vlib_time_now (vm);
1387 int *pool_indexes_to_free = NULL;
1389 uword thread_index = 0;
1391 const uword nthreads = vlib_num_workers () + 1;
1392 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1394 ip4_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1395 clib_spinlock_lock (&rt->lock);
1397 vec_reset_length (pool_indexes_to_free);
1399 pool_foreach_index (index, rt->pool, ({
1400 reass = pool_elt_at_index (rt->pool, index);
1401 if (now > reass->last_heard + rm->timeout)
1403 vec_add1 (pool_indexes_to_free, index);
1409 vec_foreach (i, pool_indexes_to_free)
1411 ip4_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
1412 ip4_reass_drop_all (vm, node, rm, reass);
1413 ip4_reass_free (rm, rt, reass);
1417 clib_spinlock_unlock (&rt->lock);
1420 vec_free (pool_indexes_to_free);
1423 _vec_len (event_data) = 0;
1431 VLIB_REGISTER_NODE (ip4_reass_expire_node, static) = {
1432 .function = ip4_reass_walk_expired,
1433 .type = VLIB_NODE_TYPE_PROCESS,
1434 .name = "ip4-reassembly-expire-walk",
1435 .format_trace = format_ip4_reass_trace,
1436 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1437 .error_strings = ip4_reassembly_error_strings,
1443 format_ip4_reass_key (u8 * s, va_list * args)
1445 ip4_reass_key_t *key = va_arg (*args, ip4_reass_key_t *);
1446 s = format (s, "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
1447 key->xx_id, format_ip4_address, &key->src, format_ip4_address,
1448 &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
1453 format_ip4_reass (u8 * s, va_list * args)
1455 vlib_main_t *vm = va_arg (*args, vlib_main_t *);
1456 ip4_reass_t *reass = va_arg (*args, ip4_reass_t *);
1458 s = format (s, "ID: %lu, key: %U\n first_bi: %u, data_len: %u, "
1459 "last_packet_octet: %u, trace_op_counter: %u\n",
1460 reass->id, format_ip4_reass_key, &reass->key, reass->first_bi,
1461 reass->data_len, reass->last_packet_octet,
1462 reass->trace_op_counter);
1463 u32 bi = reass->first_bi;
1467 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
1468 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
1469 s = format (s, " #%03u: range: [%u, %u], bi: %u, off: %d, len: %u, "
1470 "fragment[%u, %u]\n",
1471 counter, vnb->ip.reass.range_first,
1472 vnb->ip.reass.range_last, bi,
1473 ip4_reass_buffer_get_data_offset (b),
1474 ip4_reass_buffer_get_data_len (b),
1475 vnb->ip.reass.fragment_first, vnb->ip.reass.fragment_last);
1476 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
1478 bi = b->next_buffer;
1488 static clib_error_t *
1489 show_ip4_reass (vlib_main_t * vm,
1490 unformat_input_t * input,
1491 CLIB_UNUSED (vlib_cli_command_t * lmd))
1493 ip4_reass_main_t *rm = &ip4_reass_main;
1495 vlib_cli_output (vm, "---------------------");
1496 vlib_cli_output (vm, "IP4 reassembly status");
1497 vlib_cli_output (vm, "---------------------");
1498 bool details = false;
1499 if (unformat (input, "details"))
1504 u32 sum_reass_n = 0;
1507 const uword nthreads = vlib_num_workers () + 1;
1508 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1510 ip4_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1511 clib_spinlock_lock (&rt->lock);
1515 pool_foreach (reass, rt->pool, {
1516 vlib_cli_output (vm, "%U", format_ip4_reass, vm, reass);
1520 sum_reass_n += rt->reass_n;
1521 clib_spinlock_unlock (&rt->lock);
1523 vlib_cli_output (vm, "---------------------");
1524 vlib_cli_output (vm, "Current IP4 reassemblies count: %lu\n",
1525 (long unsigned) sum_reass_n);
1526 vlib_cli_output (vm,
1527 "Maximum configured concurrent IP4 reassemblies per worker-thread: %lu\n",
1528 (long unsigned) rm->max_reass_n);
1533 VLIB_CLI_COMMAND (show_ip4_reassembly_cmd, static) = {
1534 .path = "show ip4-reassembly",
1535 .short_help = "show ip4-reassembly [details]",
1536 .function = show_ip4_reass,
1540 #ifndef CLIB_MARCH_VARIANT
1542 ip4_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
1544 return vnet_feature_enable_disable ("ip4-unicast",
1545 "ip4-reassembly-feature", sw_if_index,
1546 enable_disable, 0, 0);
1548 #endif /* CLIB_MARCH_VARIANT */
1551 #define foreach_ip4_reassembly_handoff_error \
1552 _(CONGESTION_DROP, "congestion drop")
1557 #define _(sym,str) IP4_REASSEMBLY_HANDOFF_ERROR_##sym,
1558 foreach_ip4_reassembly_handoff_error
1560 IP4_REASSEMBLY_HANDOFF_N_ERROR,
1561 } ip4_reassembly_handoff_error_t;
1563 static char *ip4_reassembly_handoff_error_strings[] = {
1564 #define _(sym,string) string,
1565 foreach_ip4_reassembly_handoff_error
1571 u32 next_worker_index;
1572 } ip4_reassembly_handoff_trace_t;
1575 format_ip4_reassembly_handoff_trace (u8 * s, va_list * args)
1577 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1578 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1579 ip4_reassembly_handoff_trace_t *t =
1580 va_arg (*args, ip4_reassembly_handoff_trace_t *);
1583 format (s, "ip4-reassembly-handoff: next-worker %d",
1584 t->next_worker_index);
1590 ip4_reassembly_handoff_node_inline (vlib_main_t * vm,
1591 vlib_node_runtime_t * node,
1592 vlib_frame_t * frame, bool is_feature)
1594 ip4_reass_main_t *rm = &ip4_reass_main;
1596 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1597 u32 n_enq, n_left_from, *from;
1598 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
1601 from = vlib_frame_vector_args (frame);
1602 n_left_from = frame->n_vectors;
1603 vlib_get_buffers (vm, from, bufs, n_left_from);
1606 ti = thread_indices;
1608 fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
1610 while (n_left_from > 0)
1613 (is_feature) ? vnet_buffer (b[0])->ip.
1614 reass.owner_feature_thread_index : vnet_buffer (b[0])->ip.
1615 reass.owner_thread_index;
1618 ((node->flags & VLIB_NODE_FLAG_TRACE)
1619 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1621 ip4_reassembly_handoff_trace_t *t =
1622 vlib_add_trace (vm, node, b[0], sizeof (*t));
1623 t->next_worker_index = ti[0];
1631 vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
1632 frame->n_vectors, 1);
1634 if (n_enq < frame->n_vectors)
1635 vlib_node_increment_counter (vm, node->node_index,
1636 IP4_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
1637 frame->n_vectors - n_enq);
1638 return frame->n_vectors;
1641 VLIB_NODE_FN (ip4_reassembly_handoff_node) (vlib_main_t * vm,
1642 vlib_node_runtime_t * node,
1643 vlib_frame_t * frame)
1645 return ip4_reassembly_handoff_node_inline (vm, node, frame,
1646 false /* is_feature */ );
1651 VLIB_REGISTER_NODE (ip4_reassembly_handoff_node) = {
1652 .name = "ip4-reassembly-handoff",
1653 .vector_size = sizeof (u32),
1654 .n_errors = ARRAY_LEN(ip4_reassembly_handoff_error_strings),
1655 .error_strings = ip4_reassembly_handoff_error_strings,
1656 .format_trace = format_ip4_reassembly_handoff_trace,
1668 VLIB_NODE_FN (ip4_reassembly_feature_handoff_node) (vlib_main_t * vm,
1669 vlib_node_runtime_t *
1671 vlib_frame_t * frame)
1673 return ip4_reassembly_handoff_node_inline (vm, node, frame,
1674 true /* is_feature */ );
1680 VLIB_REGISTER_NODE (ip4_reassembly_feature_handoff_node) = {
1681 .name = "ip4-reass-feature-hoff",
1682 .vector_size = sizeof (u32),
1683 .n_errors = ARRAY_LEN(ip4_reassembly_handoff_error_strings),
1684 .error_strings = ip4_reassembly_handoff_error_strings,
1685 .format_trace = format_ip4_reassembly_handoff_trace,
1696 * fd.io coding-style-patch-verification: ON
1699 * eval: (c-set-style "gnu")