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 non-feature node
137 u32 error_next_index;
138 // is_feature flag stored for non-inline code use
140 // minimum fragment length for this reassembly - used to estimate MTU
141 u16 min_fragment_length;
142 // number of fragments in this reassembly
151 clib_spinlock_t lock;
152 } ip4_reass_per_thread_t;
159 u32 expire_walk_interval_ms;
160 // maximum number of fragments in one reassembly
162 // maximum number of reassemblies
166 clib_bihash_16_8_t hash;
168 ip4_reass_per_thread_t *per_thread_data;
171 vlib_main_t *vlib_main;
172 vnet_main_t *vnet_main;
174 // node index of ip4-drop node
176 u32 ip4_reass_expire_node_idx;
178 /** Worker handoff */
180 u32 fq_feature_index;
184 extern ip4_reass_main_t ip4_reass_main;
186 #ifndef CLIB_MARCH_VARIANT
187 ip4_reass_main_t ip4_reass_main;
188 #endif /* CLIB_MARCH_VARIANT */
192 IP4_REASSEMBLY_NEXT_INPUT,
193 IP4_REASSEMBLY_NEXT_DROP,
194 IP4_REASSEMBLY_NEXT_HANDOFF,
195 IP4_REASSEMBLY_N_NEXT,
205 } ip4_reass_trace_operation_e;
215 } ip4_reass_range_trace_t;
219 ip4_reass_trace_operation_e action;
221 ip4_reass_range_trace_t trace_range;
229 extern vlib_node_registration_t ip4_reass_node;
230 extern vlib_node_registration_t ip4_reass_node_feature;
233 ip4_reass_trace_details (vlib_main_t * vm, u32 bi,
234 ip4_reass_range_trace_t * trace)
236 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
237 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
238 trace->range_first = vnb->ip.reass.range_first;
239 trace->range_last = vnb->ip.reass.range_last;
240 trace->data_offset = ip4_reass_buffer_get_data_offset (b);
241 trace->data_len = ip4_reass_buffer_get_data_len (b);
242 trace->range_bi = bi;
246 format_ip4_reass_range_trace (u8 * s, va_list * args)
248 ip4_reass_range_trace_t *trace = va_arg (*args, ip4_reass_range_trace_t *);
249 s = format (s, "range: [%u, %u], off %d, len %u, bi %u", trace->range_first,
250 trace->range_last, trace->data_offset, trace->data_len,
256 format_ip4_reass_trace (u8 * s, va_list * args)
258 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
259 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
260 ip4_reass_trace_t *t = va_arg (*args, ip4_reass_trace_t *);
261 s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
262 u32 indent = format_get_indent (s);
263 s = format (s, "first bi: %u, data len: %u, ip/fragment[%u, %u]",
264 t->trace_range.first_bi, t->total_data_len, t->fragment_first,
269 s = format (s, "\n%Ushrink %U by %u", format_white_space, indent,
270 format_ip4_reass_range_trace, &t->trace_range,
274 s = format (s, "\n%Udiscard %U", format_white_space, indent,
275 format_ip4_reass_range_trace, &t->trace_range);
278 s = format (s, "\n%Unew %U", format_white_space, indent,
279 format_ip4_reass_range_trace, &t->trace_range);
282 s = format (s, "\n%Uoverlapping/ignored %U", format_white_space, indent,
283 format_ip4_reass_range_trace, &t->trace_range);
286 s = format (s, "\n%Ufinalize reassembly", format_white_space, indent);
293 ip4_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
294 ip4_reass_main_t * rm, ip4_reass_t * reass, u32 bi,
295 ip4_reass_trace_operation_e action, u32 size_diff)
297 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
298 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
299 if (pool_is_free_index (vm->trace_main.trace_buffer_pool, b->trace_index))
301 // this buffer's trace is gone
302 b->flags &= ~VLIB_BUFFER_IS_TRACED;
305 ip4_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
306 t->reass_id = reass->id;
308 ip4_reass_trace_details (vm, bi, &t->trace_range);
309 t->size_diff = size_diff;
310 t->op_id = reass->trace_op_counter;
311 ++reass->trace_op_counter;
312 t->fragment_first = vnb->ip.reass.fragment_first;
313 t->fragment_last = vnb->ip.reass.fragment_last;
314 t->trace_range.first_bi = reass->first_bi;
315 t->total_data_len = reass->data_len;
318 s = format (s, "%U", format_ip4_reass_trace, NULL, NULL, t);
319 printf ("%.*s\n", vec_len (s), s);
321 vec_reset_length (s);
327 ip4_reass_free (ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
330 clib_bihash_kv_16_8_t kv;
331 kv.key[0] = reass->key.as_u64[0];
332 kv.key[1] = reass->key.as_u64[1];
333 clib_bihash_add_del_16_8 (&rm->hash, &kv, 0);
334 pool_put (rt->pool, reass);
339 ip4_reass_drop_all (vlib_main_t * vm, vlib_node_runtime_t * node,
340 ip4_reass_main_t * rm, ip4_reass_t * reass,
343 u32 range_bi = reass->first_bi;
344 vlib_buffer_t *range_b;
345 vnet_buffer_opaque_t *range_vnb;
347 while (~0 != range_bi)
349 range_b = vlib_get_buffer (vm, range_bi);
350 range_vnb = vnet_buffer (range_b);
354 vec_add1 (to_free, bi);
355 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
356 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
359 b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
366 range_bi = range_vnb->ip.reass.next_range_bi;
368 /* send to next_error_index */
371 u32 n_left_to_next, *to_next, next_index;
373 next_index = reass->error_next_index;
376 while (vec_len (to_free) > 0)
378 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
380 while (vec_len (to_free) > 0 && n_left_to_next > 0)
382 bi = vec_pop (to_free);
389 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
390 to_next, n_left_to_next,
394 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
399 vlib_buffer_free (vm, to_free, vec_len (to_free));
404 ip4_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
405 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
406 ip4_reass_kv_t * kv, u8 * do_handoff,
409 ip4_reass_t *reass = NULL;
410 f64 now = vlib_time_now (rm->vlib_main);
412 if (!clib_bihash_search_16_8
413 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, (clib_bihash_kv_16_8_t *) kv))
415 if (vm->thread_index != kv->v.thread_index)
420 reass = pool_elt_at_index (rt->pool, kv->v.reass_index);
422 if (now > reass->last_heard + rm->timeout)
424 ip4_reass_drop_all (vm, node, rm, reass, is_feature);
425 ip4_reass_free (rm, rt, reass);
432 reass->last_heard = now;
436 if (rt->reass_n >= rm->max_reass_n)
443 pool_get (rt->pool, reass);
444 clib_memset (reass, 0, sizeof (*reass));
445 reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
447 reass->first_bi = ~0;
448 reass->last_packet_octet = ~0;
450 reass->is_feature = is_feature;
454 reass->key.as_u64[0] = ((clib_bihash_kv_16_8_t *) kv)->key[0];
455 reass->key.as_u64[1] = ((clib_bihash_kv_16_8_t *) kv)->key[1];
456 kv->v.reass_index = (reass - rt->pool);
457 kv->v.thread_index = vm->thread_index;
458 reass->last_heard = now;
460 if (clib_bihash_add_del_16_8 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, 1))
462 ip4_reass_free (rm, rt, reass);
469 always_inline ip4_reass_rc_t
470 ip4_reass_finalize (vlib_main_t * vm, vlib_node_runtime_t * node,
471 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
472 ip4_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
475 vlib_buffer_t *first_b = vlib_get_buffer (vm, reass->first_bi);
476 vlib_buffer_t *last_b = NULL;
477 u32 sub_chain_bi = reass->first_bi;
478 u32 total_length = 0;
482 u32 tmp_bi = sub_chain_bi;
483 vlib_buffer_t *tmp = vlib_get_buffer (vm, tmp_bi);
484 ip4_header_t *ip = vlib_buffer_get_current (tmp);
485 vnet_buffer_opaque_t *vnb = vnet_buffer (tmp);
486 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
487 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
489 return IP4_REASS_RC_INTERNAL_ERROR;
492 u32 data_len = ip4_reass_buffer_get_data_len (tmp);
494 ip4_header_bytes (ip) + ip4_reass_buffer_get_data_offset (tmp);
496 vlib_buffer_length_in_chain (vm, tmp) - trim_front - data_len;
497 if (tmp_bi == reass->first_bi)
499 /* first buffer - keep ip4 header */
500 if (0 != ip4_reass_buffer_get_data_offset (tmp))
502 return IP4_REASS_RC_INTERNAL_ERROR;
505 trim_end = vlib_buffer_length_in_chain (vm, tmp) - data_len -
506 ip4_header_bytes (ip);
507 if (!(vlib_buffer_length_in_chain (vm, tmp) - trim_end > 0))
509 return IP4_REASS_RC_INTERNAL_ERROR;
513 vlib_buffer_length_in_chain (vm, tmp) - trim_front - trim_end;
519 if (trim_front > tmp->current_length)
521 /* drop whole buffer */
522 u32 to_be_freed_bi = tmp_bi;
523 trim_front -= tmp->current_length;
524 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
526 return IP4_REASS_RC_INTERNAL_ERROR;
528 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
529 tmp_bi = tmp->next_buffer;
530 tmp->next_buffer = 0;
531 tmp = vlib_get_buffer (vm, tmp_bi);
532 vlib_buffer_free_one (vm, to_be_freed_bi);
537 vlib_buffer_advance (tmp, trim_front);
545 last_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
546 last_b->next_buffer = tmp_bi;
549 if (keep_data <= tmp->current_length)
551 tmp->current_length = keep_data;
556 keep_data -= tmp->current_length;
557 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
559 return IP4_REASS_RC_INTERNAL_ERROR;
562 total_length += tmp->current_length;
563 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
565 tmp_bi = tmp->next_buffer;
566 tmp = vlib_get_buffer (vm, tmp->next_buffer);
575 u32 to_be_freed_bi = tmp_bi;
576 if (reass->first_bi == tmp_bi)
578 return IP4_REASS_RC_INTERNAL_ERROR;
580 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
582 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
583 tmp_bi = tmp->next_buffer;
584 tmp->next_buffer = 0;
585 tmp = vlib_get_buffer (vm, tmp_bi);
586 vlib_buffer_free_one (vm, to_be_freed_bi);
590 tmp->next_buffer = 0;
591 vlib_buffer_free_one (vm, to_be_freed_bi);
597 vnet_buffer (vlib_get_buffer (vm, sub_chain_bi))->ip.
600 while (~0 != sub_chain_bi);
604 return IP4_REASS_RC_INTERNAL_ERROR;
606 last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
608 if (total_length < first_b->current_length)
610 return IP4_REASS_RC_INTERNAL_ERROR;
612 total_length -= first_b->current_length;
613 first_b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
614 first_b->total_length_not_including_first_buffer = total_length;
615 ip4_header_t *ip = vlib_buffer_get_current (first_b);
616 ip->flags_and_fragment_offset = 0;
617 ip->length = clib_host_to_net_u16 (first_b->current_length + total_length);
618 ip->checksum = ip4_header_checksum (ip);
619 if (!vlib_buffer_chain_linearize (vm, first_b))
621 return IP4_REASS_RC_NO_BUF;
623 // reset to reconstruct the mbuf linking
624 first_b->flags &= ~VLIB_BUFFER_EXT_HDR_VALID;
625 if (PREDICT_FALSE (first_b->flags & VLIB_BUFFER_IS_TRACED))
627 ip4_reass_add_trace (vm, node, rm, reass, reass->first_bi, FINALIZE, 0);
629 // following code does a hexdump of packet fragments to stdout ...
632 u32 bi = reass->first_bi;
636 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
637 s = format (s, "%u: %U\n", bi, format_hexdump,
638 vlib_buffer_get_current (b), b->current_length);
639 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
648 printf ("%.*s\n", vec_len (s), s);
655 *bi0 = reass->first_bi;
658 *next0 = IP4_REASSEMBLY_NEXT_INPUT;
662 *next0 = reass->next_index;
664 vnet_buffer (first_b)->ip.reass.estimated_mtu = reass->min_fragment_length;
665 *error0 = IP4_ERROR_NONE;
666 ip4_reass_free (rm, rt, reass);
668 return IP4_REASS_RC_OK;
671 always_inline ip4_reass_rc_t
672 ip4_reass_insert_range_in_chain (vlib_main_t * vm,
673 ip4_reass_main_t * rm,
674 ip4_reass_per_thread_t * rt,
676 u32 prev_range_bi, u32 new_next_bi)
678 vlib_buffer_t *new_next_b = vlib_get_buffer (vm, new_next_bi);
679 vnet_buffer_opaque_t *new_next_vnb = vnet_buffer (new_next_b);
680 if (~0 != prev_range_bi)
682 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
683 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
684 new_next_vnb->ip.reass.next_range_bi = prev_vnb->ip.reass.next_range_bi;
685 prev_vnb->ip.reass.next_range_bi = new_next_bi;
689 if (~0 != reass->first_bi)
691 new_next_vnb->ip.reass.next_range_bi = reass->first_bi;
693 reass->first_bi = new_next_bi;
695 vnet_buffer_opaque_t *vnb = vnet_buffer (new_next_b);
696 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
697 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
699 return IP4_REASS_RC_INTERNAL_ERROR;
701 reass->data_len += ip4_reass_buffer_get_data_len (new_next_b);
702 return IP4_REASS_RC_OK;
705 always_inline ip4_reass_rc_t
706 ip4_reass_remove_range_from_chain (vlib_main_t * vm,
707 vlib_node_runtime_t * node,
708 ip4_reass_main_t * rm,
709 ip4_reass_t * reass, u32 prev_range_bi,
712 vlib_buffer_t *discard_b = vlib_get_buffer (vm, discard_bi);
713 vnet_buffer_opaque_t *discard_vnb = vnet_buffer (discard_b);
714 if (~0 != prev_range_bi)
716 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
717 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
718 if (!(prev_vnb->ip.reass.next_range_bi == discard_bi))
720 return IP4_REASS_RC_INTERNAL_ERROR;
722 prev_vnb->ip.reass.next_range_bi = discard_vnb->ip.reass.next_range_bi;
726 reass->first_bi = discard_vnb->ip.reass.next_range_bi;
728 vnet_buffer_opaque_t *vnb = vnet_buffer (discard_b);
729 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
730 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
732 return IP4_REASS_RC_INTERNAL_ERROR;
734 reass->data_len -= ip4_reass_buffer_get_data_len (discard_b);
737 u32 to_be_freed_bi = discard_bi;
738 if (PREDICT_FALSE (discard_b->flags & VLIB_BUFFER_IS_TRACED))
740 ip4_reass_add_trace (vm, node, rm, reass, discard_bi, RANGE_DISCARD,
743 if (discard_b->flags & VLIB_BUFFER_NEXT_PRESENT)
745 discard_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
746 discard_bi = discard_b->next_buffer;
747 discard_b->next_buffer = 0;
748 discard_b = vlib_get_buffer (vm, discard_bi);
749 vlib_buffer_free_one (vm, to_be_freed_bi);
753 discard_b->next_buffer = 0;
754 vlib_buffer_free_one (vm, to_be_freed_bi);
758 return IP4_REASS_RC_OK;
761 always_inline ip4_reass_rc_t
762 ip4_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
763 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
764 ip4_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
767 ip4_reass_rc_t rc = IP4_REASS_RC_OK;
769 vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0);
770 ip4_header_t *fip = vlib_buffer_get_current (fb);
771 vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
772 reass->next_index = fvnb->ip.reass.next_index; // store next_index before it's overwritten
773 const u32 fragment_first = ip4_get_fragment_offset_bytes (fip);
774 const u32 fragment_length =
775 clib_net_to_host_u16 (fip->length) - ip4_header_bytes (fip);
776 const u32 fragment_last = fragment_first + fragment_length - 1;
777 fvnb->ip.reass.fragment_first = fragment_first;
778 fvnb->ip.reass.fragment_last = fragment_last;
779 int more_fragments = ip4_get_fragment_more (fip);
780 u32 candidate_range_bi = reass->first_bi;
781 u32 prev_range_bi = ~0;
782 fvnb->ip.reass.range_first = fragment_first;
783 fvnb->ip.reass.range_last = fragment_last;
784 fvnb->ip.reass.next_range_bi = ~0;
787 reass->last_packet_octet = fragment_last;
789 if (~0 == reass->first_bi)
791 // starting a new reassembly
793 ip4_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
795 if (IP4_REASS_RC_OK != rc)
799 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
801 ip4_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0);
804 reass->min_fragment_length = clib_net_to_host_u16 (fip->length);
805 reass->fragments_n = 1;
806 return IP4_REASS_RC_OK;
808 reass->min_fragment_length = clib_min (clib_net_to_host_u16 (fip->length),
809 fvnb->ip.reass.estimated_mtu);
810 while (~0 != candidate_range_bi)
812 vlib_buffer_t *candidate_b = vlib_get_buffer (vm, candidate_range_bi);
813 vnet_buffer_opaque_t *candidate_vnb = vnet_buffer (candidate_b);
814 if (fragment_first > candidate_vnb->ip.reass.range_last)
816 // this fragments starts after candidate range
817 prev_range_bi = candidate_range_bi;
818 candidate_range_bi = candidate_vnb->ip.reass.next_range_bi;
819 if (candidate_vnb->ip.reass.range_last < fragment_last &&
820 ~0 == candidate_range_bi)
822 // special case - this fragment falls beyond all known ranges
824 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
825 prev_range_bi, *bi0);
826 if (IP4_REASS_RC_OK != rc)
835 if (fragment_last < candidate_vnb->ip.reass.range_first)
837 // this fragment ends before candidate range without any overlap
839 ip4_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
841 if (IP4_REASS_RC_OK != rc)
849 if (fragment_first >= candidate_vnb->ip.reass.range_first &&
850 fragment_last <= candidate_vnb->ip.reass.range_last)
852 // this fragment is a (sub)part of existing range, ignore it
853 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
855 ip4_reass_add_trace (vm, node, rm, reass, *bi0,
860 int discard_candidate = 0;
861 if (fragment_first < candidate_vnb->ip.reass.range_first)
864 fragment_last - candidate_vnb->ip.reass.range_first + 1;
865 if (overlap < ip4_reass_buffer_get_data_len (candidate_b))
867 candidate_vnb->ip.reass.range_first += overlap;
868 if (reass->data_len < overlap)
870 return IP4_REASS_RC_INTERNAL_ERROR;
872 reass->data_len -= overlap;
873 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
875 ip4_reass_add_trace (vm, node, rm, reass,
876 candidate_range_bi, RANGE_SHRINK,
880 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
881 prev_range_bi, *bi0);
882 if (IP4_REASS_RC_OK != rc)
890 discard_candidate = 1;
893 else if (fragment_last > candidate_vnb->ip.reass.range_last)
896 candidate_vnb->ip.reass.range_last - fragment_first + 1;
897 if (overlap < ip4_reass_buffer_get_data_len (candidate_b))
899 fvnb->ip.reass.range_first += overlap;
900 if (~0 != candidate_vnb->ip.reass.next_range_bi)
902 prev_range_bi = candidate_range_bi;
904 candidate_vnb->ip.reass.next_range_bi;
909 // special case - last range discarded
911 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
914 if (IP4_REASS_RC_OK != rc)
923 discard_candidate = 1;
928 discard_candidate = 1;
930 if (discard_candidate)
932 u32 next_range_bi = candidate_vnb->ip.reass.next_range_bi;
933 // discard candidate range, probe next range
935 ip4_reass_remove_range_from_chain (vm, node, rm, reass,
938 if (IP4_REASS_RC_OK != rc)
942 if (~0 != next_range_bi)
944 candidate_range_bi = next_range_bi;
949 // special case - last range discarded
951 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
952 prev_range_bi, *bi0);
953 if (IP4_REASS_RC_OK != rc)
963 ++reass->fragments_n;
966 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
968 ip4_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0);
971 if (~0 != reass->last_packet_octet &&
972 reass->data_len == reass->last_packet_octet + 1)
974 return ip4_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0,
982 if (reass->fragments_n > rm->max_reass_len)
984 rc = IP4_REASS_RC_TOO_MANY_FRAGMENTS;
989 *next0 = IP4_REASSEMBLY_NEXT_DROP;
990 *error0 = IP4_ERROR_REASS_DUPLICATE_FRAGMENT;
997 ip4_reassembly_inline (vlib_main_t * vm,
998 vlib_node_runtime_t * node,
999 vlib_frame_t * frame, bool is_feature)
1001 u32 *from = vlib_frame_vector_args (frame);
1002 u32 n_left_from, n_left_to_next, *to_next, next_index;
1003 ip4_reass_main_t *rm = &ip4_reass_main;
1004 ip4_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
1005 clib_spinlock_lock (&rt->lock);
1007 n_left_from = frame->n_vectors;
1008 next_index = node->cached_next_index;
1009 while (n_left_from > 0)
1011 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1013 while (n_left_from > 0 && n_left_to_next > 0)
1018 u32 error0 = IP4_ERROR_NONE;
1021 b0 = vlib_get_buffer (vm, bi0);
1023 ip4_header_t *ip0 = vlib_buffer_get_current (b0);
1024 if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0))
1026 // this is a whole packet - no fragmentation
1029 next0 = IP4_REASSEMBLY_NEXT_INPUT;
1033 next0 = vnet_buffer (b0)->ip.reass.next_index;
1038 const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
1039 const u32 fragment_length =
1040 clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0);
1041 const u32 fragment_last = fragment_first + fragment_length - 1;
1042 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
1044 next0 = IP4_REASSEMBLY_NEXT_DROP;
1045 error0 = IP4_ERROR_REASS_MALFORMED_PACKET;
1053 (u64) vec_elt (ip4_main.fib_index_by_sw_if_index,
1054 vnet_buffer (b0)->sw_if_index[VLIB_RX]) |
1055 (u64) ip0->src_address.as_u32 << 32;
1057 (u64) ip0->dst_address.as_u32 |
1058 (u64) ip0->fragment_id << 32 | (u64) ip0->protocol << 48;
1060 ip4_reass_t *reass =
1061 ip4_reass_find_or_create (vm, node, rm, rt, &kv,
1062 &do_handoff, is_feature);
1064 if (PREDICT_FALSE (do_handoff))
1066 next0 = IP4_REASSEMBLY_NEXT_HANDOFF;
1068 vnet_buffer (b0)->ip.
1069 reass.owner_feature_thread_index =
1072 vnet_buffer (b0)->ip.reass.owner_thread_index =
1077 switch (ip4_reass_update
1078 (vm, node, rm, rt, reass, &bi0, &next0,
1079 &error0, is_feature))
1081 case IP4_REASS_RC_OK:
1082 /* nothing to do here */
1084 case IP4_REASS_RC_TOO_MANY_FRAGMENTS:
1085 vlib_node_increment_counter (vm, node->node_index,
1086 IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
1088 ip4_reass_drop_all (vm, node, rm, reass,
1090 ip4_reass_free (rm, rt, reass);
1093 case IP4_REASS_RC_NO_BUF:
1094 vlib_node_increment_counter (vm, node->node_index,
1095 IP4_ERROR_REASS_NO_BUF,
1097 ip4_reass_drop_all (vm, node, rm, reass,
1099 ip4_reass_free (rm, rt, reass);
1102 case IP4_REASS_RC_INTERNAL_ERROR:
1103 /* drop everything and start with a clean slate */
1104 vlib_node_increment_counter (vm, node->node_index,
1105 IP4_ERROR_REASS_INTERNAL_ERROR,
1107 ip4_reass_drop_all (vm, node, rm, reass,
1109 ip4_reass_free (rm, rt, reass);
1116 next0 = IP4_REASSEMBLY_NEXT_DROP;
1117 error0 = IP4_ERROR_REASS_LIMIT_REACHED;
1121 b0->error = node->errors[error0];
1128 n_left_to_next -= 1;
1129 if (is_feature && IP4_ERROR_NONE == error0)
1131 b0 = vlib_get_buffer (vm, bi0);
1132 vnet_feature_next (&next0, b0);
1134 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1135 to_next, n_left_to_next,
1137 IP4_REASS_DEBUG_BUFFER (bi0, enqueue_next);
1145 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1148 clib_spinlock_unlock (&rt->lock);
1149 return frame->n_vectors;
1152 static char *ip4_reassembly_error_strings[] = {
1153 #define _(sym, string) string,
1158 VLIB_NODE_FN (ip4_reass_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1159 vlib_frame_t * frame)
1161 return ip4_reassembly_inline (vm, node, frame, false /* is_feature */ );
1165 VLIB_REGISTER_NODE (ip4_reass_node) = {
1166 .name = "ip4-reassembly",
1167 .vector_size = sizeof (u32),
1168 .format_trace = format_ip4_reass_trace,
1169 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1170 .error_strings = ip4_reassembly_error_strings,
1171 .n_next_nodes = IP4_REASSEMBLY_N_NEXT,
1174 [IP4_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1175 [IP4_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1176 [IP4_REASSEMBLY_NEXT_HANDOFF] = "ip4-reassembly-handoff",
1182 VLIB_NODE_FN (ip4_reass_node_feature) (vlib_main_t * vm,
1183 vlib_node_runtime_t * node,
1184 vlib_frame_t * frame)
1186 return ip4_reassembly_inline (vm, node, frame, true /* is_feature */ );
1190 VLIB_REGISTER_NODE (ip4_reass_node_feature) = {
1191 .name = "ip4-reassembly-feature",
1192 .vector_size = sizeof (u32),
1193 .format_trace = format_ip4_reass_trace,
1194 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1195 .error_strings = ip4_reassembly_error_strings,
1196 .n_next_nodes = IP4_REASSEMBLY_N_NEXT,
1199 [IP4_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1200 [IP4_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1201 [IP4_REASSEMBLY_NEXT_HANDOFF] = "ip4-reass-feature-hoff",
1207 VNET_FEATURE_INIT (ip4_reassembly_feature, static) = {
1208 .arc_name = "ip4-unicast",
1209 .node_name = "ip4-reassembly-feature",
1210 .runs_before = VNET_FEATURES ("ip4-lookup"),
1215 #ifndef CLIB_MARCH_VARIANT
1217 ip4_reass_get_nbuckets ()
1219 ip4_reass_main_t *rm = &ip4_reass_main;
1223 nbuckets = (u32) (rm->max_reass_n / IP4_REASS_HT_LOAD_FACTOR);
1225 for (i = 0; i < 31; i++)
1226 if ((1 << i) >= nbuckets)
1232 #endif /* CLIB_MARCH_VARIANT */
1236 IP4_EVENT_CONFIG_CHANGED = 1,
1237 } ip4_reass_event_t;
1242 clib_bihash_16_8_t *new_hash;
1243 } ip4_rehash_cb_ctx;
1245 #ifndef CLIB_MARCH_VARIANT
1247 ip4_rehash_cb (clib_bihash_kv_16_8_t * kv, void *_ctx)
1249 ip4_rehash_cb_ctx *ctx = _ctx;
1250 if (clib_bihash_add_del_16_8 (ctx->new_hash, kv, 1))
1257 ip4_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
1258 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1260 ip4_reass_main.timeout_ms = timeout_ms;
1261 ip4_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
1262 ip4_reass_main.max_reass_n = max_reassemblies;
1263 ip4_reass_main.max_reass_len = max_reassembly_length;
1264 ip4_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
1268 ip4_reass_set (u32 timeout_ms, u32 max_reassemblies,
1269 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1271 u32 old_nbuckets = ip4_reass_get_nbuckets ();
1272 ip4_reass_set_params (timeout_ms, max_reassemblies, max_reassembly_length,
1273 expire_walk_interval_ms);
1274 vlib_process_signal_event (ip4_reass_main.vlib_main,
1275 ip4_reass_main.ip4_reass_expire_node_idx,
1276 IP4_EVENT_CONFIG_CHANGED, 0);
1277 u32 new_nbuckets = ip4_reass_get_nbuckets ();
1278 if (ip4_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
1280 clib_bihash_16_8_t new_hash;
1281 clib_memset (&new_hash, 0, sizeof (new_hash));
1282 ip4_rehash_cb_ctx ctx;
1284 ctx.new_hash = &new_hash;
1285 clib_bihash_init_16_8 (&new_hash, "ip4-reass", new_nbuckets,
1286 new_nbuckets * 1024);
1287 clib_bihash_foreach_key_value_pair_16_8 (&ip4_reass_main.hash,
1288 ip4_rehash_cb, &ctx);
1291 clib_bihash_free_16_8 (&new_hash);
1296 clib_bihash_free_16_8 (&ip4_reass_main.hash);
1297 clib_memcpy_fast (&ip4_reass_main.hash, &new_hash,
1298 sizeof (ip4_reass_main.hash));
1305 ip4_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
1306 u32 * max_reassembly_length, u32 * expire_walk_interval_ms)
1308 *timeout_ms = ip4_reass_main.timeout_ms;
1309 *max_reassemblies = ip4_reass_main.max_reass_n;
1310 *max_reassembly_length = ip4_reass_main.max_reass_len;
1311 *expire_walk_interval_ms = ip4_reass_main.expire_walk_interval_ms;
1315 static clib_error_t *
1316 ip4_reass_init_function (vlib_main_t * vm)
1318 ip4_reass_main_t *rm = &ip4_reass_main;
1319 clib_error_t *error = 0;
1324 rm->vnet_main = vnet_get_main ();
1326 vec_validate (rm->per_thread_data, vlib_num_workers ());
1327 ip4_reass_per_thread_t *rt;
1328 vec_foreach (rt, rm->per_thread_data)
1330 clib_spinlock_init (&rt->lock);
1331 pool_alloc (rt->pool, rm->max_reass_n);
1334 node = vlib_get_node_by_name (vm, (u8 *) "ip4-reassembly-expire-walk");
1336 rm->ip4_reass_expire_node_idx = node->index;
1338 ip4_reass_set_params (IP4_REASS_TIMEOUT_DEFAULT_MS,
1339 IP4_REASS_MAX_REASSEMBLIES_DEFAULT,
1340 IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
1341 IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
1343 nbuckets = ip4_reass_get_nbuckets ();
1344 clib_bihash_init_16_8 (&rm->hash, "ip4-reass", nbuckets, nbuckets * 1024);
1346 node = vlib_get_node_by_name (vm, (u8 *) "ip4-drop");
1348 rm->ip4_drop_idx = node->index;
1350 rm->fq_index = vlib_frame_queue_main_init (ip4_reass_node.index, 0);
1351 rm->fq_feature_index =
1352 vlib_frame_queue_main_init (ip4_reass_node_feature.index, 0);
1358 VLIB_INIT_FUNCTION (ip4_reass_init_function);
1359 #endif /* CLIB_MARCH_VARIANT */
1362 ip4_reass_walk_expired (vlib_main_t * vm,
1363 vlib_node_runtime_t * node, vlib_frame_t * f)
1365 ip4_reass_main_t *rm = &ip4_reass_main;
1366 uword event_type, *event_data = 0;
1370 vlib_process_wait_for_event_or_clock (vm,
1372 rm->expire_walk_interval_ms /
1373 (f64) MSEC_PER_SEC);
1374 event_type = vlib_process_get_events (vm, &event_data);
1378 case ~0: /* no events => timeout */
1379 /* nothing to do here */
1381 case IP4_EVENT_CONFIG_CHANGED:
1384 clib_warning ("BUG: event type 0x%wx", event_type);
1387 f64 now = vlib_time_now (vm);
1390 int *pool_indexes_to_free = NULL;
1392 uword thread_index = 0;
1394 const uword nthreads = vlib_num_workers () + 1;
1395 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1397 ip4_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1398 clib_spinlock_lock (&rt->lock);
1400 vec_reset_length (pool_indexes_to_free);
1402 pool_foreach_index (index, rt->pool, ({
1403 reass = pool_elt_at_index (rt->pool, index);
1404 if (now > reass->last_heard + rm->timeout)
1406 vec_add1 (pool_indexes_to_free, index);
1412 vec_foreach (i, pool_indexes_to_free)
1414 ip4_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
1415 ip4_reass_drop_all (vm, node, rm, reass, reass->is_feature);
1416 ip4_reass_free (rm, rt, reass);
1420 clib_spinlock_unlock (&rt->lock);
1423 vec_free (pool_indexes_to_free);
1426 _vec_len (event_data) = 0;
1434 VLIB_REGISTER_NODE (ip4_reass_expire_node, static) = {
1435 .function = ip4_reass_walk_expired,
1436 .type = VLIB_NODE_TYPE_PROCESS,
1437 .name = "ip4-reassembly-expire-walk",
1438 .format_trace = format_ip4_reass_trace,
1439 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1440 .error_strings = ip4_reassembly_error_strings,
1446 format_ip4_reass_key (u8 * s, va_list * args)
1448 ip4_reass_key_t *key = va_arg (*args, ip4_reass_key_t *);
1449 s = format (s, "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
1450 key->xx_id, format_ip4_address, &key->src, format_ip4_address,
1451 &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
1456 format_ip4_reass (u8 * s, va_list * args)
1458 vlib_main_t *vm = va_arg (*args, vlib_main_t *);
1459 ip4_reass_t *reass = va_arg (*args, ip4_reass_t *);
1461 s = format (s, "ID: %lu, key: %U\n first_bi: %u, data_len: %u, "
1462 "last_packet_octet: %u, trace_op_counter: %u\n",
1463 reass->id, format_ip4_reass_key, &reass->key, reass->first_bi,
1464 reass->data_len, reass->last_packet_octet,
1465 reass->trace_op_counter);
1466 u32 bi = reass->first_bi;
1470 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
1471 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
1472 s = format (s, " #%03u: range: [%u, %u], bi: %u, off: %d, len: %u, "
1473 "fragment[%u, %u]\n",
1474 counter, vnb->ip.reass.range_first,
1475 vnb->ip.reass.range_last, bi,
1476 ip4_reass_buffer_get_data_offset (b),
1477 ip4_reass_buffer_get_data_len (b),
1478 vnb->ip.reass.fragment_first, vnb->ip.reass.fragment_last);
1479 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
1481 bi = b->next_buffer;
1491 static clib_error_t *
1492 show_ip4_reass (vlib_main_t * vm,
1493 unformat_input_t * input,
1494 CLIB_UNUSED (vlib_cli_command_t * lmd))
1496 ip4_reass_main_t *rm = &ip4_reass_main;
1498 vlib_cli_output (vm, "---------------------");
1499 vlib_cli_output (vm, "IP4 reassembly status");
1500 vlib_cli_output (vm, "---------------------");
1501 bool details = false;
1502 if (unformat (input, "details"))
1507 u32 sum_reass_n = 0;
1510 const uword nthreads = vlib_num_workers () + 1;
1511 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1513 ip4_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1514 clib_spinlock_lock (&rt->lock);
1518 pool_foreach (reass, rt->pool, {
1519 vlib_cli_output (vm, "%U", format_ip4_reass, vm, reass);
1523 sum_reass_n += rt->reass_n;
1524 clib_spinlock_unlock (&rt->lock);
1526 vlib_cli_output (vm, "---------------------");
1527 vlib_cli_output (vm, "Current IP4 reassemblies count: %lu\n",
1528 (long unsigned) sum_reass_n);
1529 vlib_cli_output (vm,
1530 "Maximum configured concurrent IP4 reassemblies per worker-thread: %lu\n",
1531 (long unsigned) rm->max_reass_n);
1536 VLIB_CLI_COMMAND (show_ip4_reassembly_cmd, static) = {
1537 .path = "show ip4-reassembly",
1538 .short_help = "show ip4-reassembly [details]",
1539 .function = show_ip4_reass,
1543 #ifndef CLIB_MARCH_VARIANT
1545 ip4_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
1547 return vnet_feature_enable_disable ("ip4-unicast",
1548 "ip4-reassembly-feature", sw_if_index,
1549 enable_disable, 0, 0);
1551 #endif /* CLIB_MARCH_VARIANT */
1554 #define foreach_ip4_reassembly_handoff_error \
1555 _(CONGESTION_DROP, "congestion drop")
1560 #define _(sym,str) IP4_REASSEMBLY_HANDOFF_ERROR_##sym,
1561 foreach_ip4_reassembly_handoff_error
1563 IP4_REASSEMBLY_HANDOFF_N_ERROR,
1564 } ip4_reassembly_handoff_error_t;
1566 static char *ip4_reassembly_handoff_error_strings[] = {
1567 #define _(sym,string) string,
1568 foreach_ip4_reassembly_handoff_error
1574 u32 next_worker_index;
1575 } ip4_reassembly_handoff_trace_t;
1578 format_ip4_reassembly_handoff_trace (u8 * s, va_list * args)
1580 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1581 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1582 ip4_reassembly_handoff_trace_t *t =
1583 va_arg (*args, ip4_reassembly_handoff_trace_t *);
1586 format (s, "ip4-reassembly-handoff: next-worker %d",
1587 t->next_worker_index);
1593 ip4_reassembly_handoff_node_inline (vlib_main_t * vm,
1594 vlib_node_runtime_t * node,
1595 vlib_frame_t * frame, bool is_feature)
1597 ip4_reass_main_t *rm = &ip4_reass_main;
1599 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1600 u32 n_enq, n_left_from, *from;
1601 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
1604 from = vlib_frame_vector_args (frame);
1605 n_left_from = frame->n_vectors;
1606 vlib_get_buffers (vm, from, bufs, n_left_from);
1609 ti = thread_indices;
1611 fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
1613 while (n_left_from > 0)
1616 (is_feature) ? vnet_buffer (b[0])->ip.
1617 reass.owner_feature_thread_index : vnet_buffer (b[0])->ip.
1618 reass.owner_thread_index;
1621 ((node->flags & VLIB_NODE_FLAG_TRACE)
1622 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1624 ip4_reassembly_handoff_trace_t *t =
1625 vlib_add_trace (vm, node, b[0], sizeof (*t));
1626 t->next_worker_index = ti[0];
1634 vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
1635 frame->n_vectors, 1);
1637 if (n_enq < frame->n_vectors)
1638 vlib_node_increment_counter (vm, node->node_index,
1639 IP4_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
1640 frame->n_vectors - n_enq);
1641 return frame->n_vectors;
1644 VLIB_NODE_FN (ip4_reassembly_handoff_node) (vlib_main_t * vm,
1645 vlib_node_runtime_t * node,
1646 vlib_frame_t * frame)
1648 return ip4_reassembly_handoff_node_inline (vm, node, frame,
1649 false /* is_feature */ );
1654 VLIB_REGISTER_NODE (ip4_reassembly_handoff_node) = {
1655 .name = "ip4-reassembly-handoff",
1656 .vector_size = sizeof (u32),
1657 .n_errors = ARRAY_LEN(ip4_reassembly_handoff_error_strings),
1658 .error_strings = ip4_reassembly_handoff_error_strings,
1659 .format_trace = format_ip4_reassembly_handoff_trace,
1671 VLIB_NODE_FN (ip4_reassembly_feature_handoff_node) (vlib_main_t * vm,
1672 vlib_node_runtime_t *
1674 vlib_frame_t * frame)
1676 return ip4_reassembly_handoff_node_inline (vm, node, frame,
1677 true /* is_feature */ );
1683 VLIB_REGISTER_NODE (ip4_reassembly_feature_handoff_node) = {
1684 .name = "ip4-reass-feature-hoff",
1685 .vector_size = sizeof (u32),
1686 .n_errors = ARRAY_LEN(ip4_reassembly_handoff_error_strings),
1687 .error_strings = ip4_reassembly_handoff_error_strings,
1688 .format_trace = format_ip4_reassembly_handoff_trace,
1699 * fd.io coding-style-patch-verification: ON
1702 * eval: (c-set-style "gnu")