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 IPv6 Reassembly.
20 * This file contains the source code for IPv6 reassembly.
23 #include <vppinfra/vec.h>
24 #include <vnet/vnet.h>
25 #include <vnet/ip/ip.h>
26 #include <vppinfra/bihash_48_8.h>
27 #include <vnet/ip/ip6_reassembly.h>
29 #define MSEC_PER_SEC 1000
30 #define IP6_REASS_TIMEOUT_DEFAULT_MS 100
31 #define IP6_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
32 #define IP6_REASS_MAX_REASSEMBLIES_DEFAULT 1024
33 #define IP6_REASS_HT_LOAD_FACTOR (0.75)
38 IP6_REASS_RC_INTERNAL_ERROR,
76 clib_bihash_kv_48_8_t kv;
81 ip6_reass_buffer_get_data_offset (vlib_buffer_t * b)
83 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
84 return vnb->ip.reass.range_first - vnb->ip.reass.fragment_first;
88 ip6_reass_buffer_get_data_len (vlib_buffer_t * b)
90 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
91 return clib_min (vnb->ip.reass.range_last, vnb->ip.reass.fragment_last) -
92 (vnb->ip.reass.fragment_first + ip6_reass_buffer_get_data_offset (b)) + 1;
99 // time when last packet was received
101 // internal id of this reassembly
103 // buffer index of first buffer in this reassembly context
105 // last octet of packet, ~0 until fragment without more_fragments arrives
106 u32 last_packet_octet;
107 // length of data collected so far
109 // trace operation counter
110 u32 trace_op_counter;
111 // next index - used by non-feature node
113 // minimum fragment length for this reassembly - used to estimate MTU
114 u16 min_fragment_length;
122 clib_spinlock_t lock;
123 } ip6_reass_per_thread_t;
130 u32 expire_walk_interval_ms;
134 clib_bihash_48_8_t hash;
137 ip6_reass_per_thread_t *per_thread_data;
140 vlib_main_t *vlib_main;
141 vnet_main_t *vnet_main;
143 // node index of ip6-drop node
145 u32 ip6_icmp_error_idx;
146 u32 ip6_reass_expire_node_idx;
148 /** Worker handoff */
150 u32 fq_feature_index;
154 extern ip6_reass_main_t ip6_reass_main;
156 #ifndef CLIB_MARCH_VARIANT
157 ip6_reass_main_t ip6_reass_main;
158 #endif /* CLIB_MARCH_VARIANT */
162 IP6_REASSEMBLY_NEXT_INPUT,
163 IP6_REASSEMBLY_NEXT_DROP,
164 IP6_REASSEMBLY_NEXT_ICMP_ERROR,
165 IP6_REASSEMBLY_NEXT_HANDOFF,
166 IP6_REASSEMBLY_N_NEXT,
173 ICMP_ERROR_RT_EXCEEDED,
174 ICMP_ERROR_FL_TOO_BIG,
175 ICMP_ERROR_FL_NOT_MULT_8,
177 } ip6_reass_trace_operation_e;
187 } ip6_reass_range_trace_t;
191 ip6_reass_trace_operation_e action;
193 ip6_reass_range_trace_t trace_range;
202 ip6_reass_trace_details (vlib_main_t * vm, u32 bi,
203 ip6_reass_range_trace_t * trace)
205 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
206 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
207 trace->range_first = vnb->ip.reass.range_first;
208 trace->range_last = vnb->ip.reass.range_last;
209 trace->data_offset = ip6_reass_buffer_get_data_offset (b);
210 trace->data_len = ip6_reass_buffer_get_data_len (b);
211 trace->range_bi = bi;
215 format_ip6_reass_range_trace (u8 * s, va_list * args)
217 ip6_reass_range_trace_t *trace = va_arg (*args, ip6_reass_range_trace_t *);
218 s = format (s, "range: [%u, %u], off %d, len %u, bi %u", trace->range_first,
219 trace->range_last, trace->data_offset, trace->data_len,
225 format_ip6_reass_trace (u8 * s, va_list * args)
227 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
228 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
229 ip6_reass_trace_t *t = va_arg (*args, ip6_reass_trace_t *);
230 s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
231 u32 indent = format_get_indent (s);
232 s = format (s, "first bi: %u, data len: %u, ip/fragment[%u, %u]",
233 t->trace_range.first_bi, t->total_data_len, t->fragment_first,
238 s = format (s, "\n%Unew %U", format_white_space, indent,
239 format_ip6_reass_range_trace, &t->trace_range);
242 s = format (s, "\n%Uoverlap %U", format_white_space, indent,
243 format_ip6_reass_range_trace, &t->trace_range);
245 case ICMP_ERROR_FL_TOO_BIG:
246 s = format (s, "\n%Uicmp-error - frag_len > 65535 %U",
247 format_white_space, indent, format_ip6_reass_range_trace,
250 case ICMP_ERROR_FL_NOT_MULT_8:
251 s = format (s, "\n%Uicmp-error - frag_len mod 8 != 0 %U",
252 format_white_space, indent, format_ip6_reass_range_trace,
255 case ICMP_ERROR_RT_EXCEEDED:
256 s = format (s, "\n%Uicmp-error - reassembly time exceeded",
257 format_white_space, indent);
260 s = format (s, "\n%Ufinalize reassembly", format_white_space, indent);
267 ip6_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
268 ip6_reass_main_t * rm, ip6_reass_t * reass,
269 u32 bi, ip6_reass_trace_operation_e action,
272 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
273 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
274 if (pool_is_free_index (vm->trace_main.trace_buffer_pool, b->trace_index))
276 // this buffer's trace is gone
277 b->flags &= ~VLIB_BUFFER_IS_TRACED;
280 ip6_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
281 t->reass_id = reass->id;
283 ip6_reass_trace_details (vm, bi, &t->trace_range);
284 t->size_diff = size_diff;
285 t->op_id = reass->trace_op_counter;
286 ++reass->trace_op_counter;
287 t->fragment_first = vnb->ip.reass.fragment_first;
288 t->fragment_last = vnb->ip.reass.fragment_last;
289 t->trace_range.first_bi = reass->first_bi;
290 t->total_data_len = reass->data_len;
293 s = format (s, "%U", format_ip6_reass_trace, NULL, NULL, t);
294 printf ("%.*s\n", vec_len (s), s);
296 vec_reset_length (s);
301 ip6_reass_free (ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
304 clib_bihash_kv_48_8_t kv;
305 kv.key[0] = reass->key.as_u64[0];
306 kv.key[1] = reass->key.as_u64[1];
307 kv.key[2] = reass->key.as_u64[2];
308 kv.key[3] = reass->key.as_u64[3];
309 kv.key[4] = reass->key.as_u64[4];
310 kv.key[5] = reass->key.as_u64[5];
311 clib_bihash_add_del_48_8 (&rm->hash, &kv, 0);
312 pool_put (rt->pool, reass);
317 ip6_reass_drop_all (vlib_main_t * vm, ip6_reass_main_t * rm,
320 u32 range_bi = reass->first_bi;
321 vlib_buffer_t *range_b;
322 vnet_buffer_opaque_t *range_vnb;
324 while (~0 != range_bi)
326 range_b = vlib_get_buffer (vm, range_bi);
327 range_vnb = vnet_buffer (range_b);
331 vec_add1 (to_free, bi);
332 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
333 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
336 b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
343 range_bi = range_vnb->ip.reass.next_range_bi;
345 vlib_buffer_free (vm, to_free, vec_len (to_free));
350 ip6_reass_on_timeout (vlib_main_t * vm, vlib_node_runtime_t * node,
351 ip6_reass_main_t * rm, ip6_reass_t * reass,
354 if (~0 == reass->first_bi)
358 vlib_buffer_t *b = vlib_get_buffer (vm, reass->first_bi);
359 if (0 == vnet_buffer (b)->ip.reass.fragment_first)
361 *icmp_bi = reass->first_bi;
362 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
364 ip6_reass_add_trace (vm, node, rm, reass, reass->first_bi,
365 ICMP_ERROR_RT_EXCEEDED, 0);
367 // fragment with offset zero received - send icmp message back
368 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
370 // separate first buffer from chain and steer it towards icmp node
371 b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
372 reass->first_bi = b->next_buffer;
376 reass->first_bi = vnet_buffer (b)->ip.reass.next_range_bi;
378 icmp6_error_set_vnet_buffer (b, ICMP6_time_exceeded,
379 ICMP6_time_exceeded_fragment_reassembly_time_exceeded,
382 ip6_reass_drop_all (vm, rm, reass);
385 always_inline ip6_reass_t *
386 ip6_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
387 ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
388 ip6_reass_kv_t * kv, u32 * icmp_bi, u8 * do_handoff)
390 ip6_reass_t *reass = NULL;
391 f64 now = vlib_time_now (rm->vlib_main);
393 if (!clib_bihash_search_48_8
394 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, (clib_bihash_kv_48_8_t *) kv))
396 if (vm->thread_index != kv->v.thread_index)
401 reass = pool_elt_at_index (rt->pool, kv->v.reass_index);
403 if (now > reass->last_heard + rm->timeout)
405 ip6_reass_on_timeout (vm, node, rm, reass, icmp_bi);
406 ip6_reass_free (rm, rt, reass);
413 reass->last_heard = now;
417 if (rt->reass_n >= rm->max_reass_n)
424 pool_get (rt->pool, reass);
425 clib_memset (reass, 0, sizeof (*reass));
426 reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
428 reass->first_bi = ~0;
429 reass->last_packet_octet = ~0;
434 reass->key.as_u64[0] = ((clib_bihash_kv_48_8_t *) kv)->key[0];
435 reass->key.as_u64[1] = ((clib_bihash_kv_48_8_t *) kv)->key[1];
436 reass->key.as_u64[2] = ((clib_bihash_kv_48_8_t *) kv)->key[2];
437 reass->key.as_u64[3] = ((clib_bihash_kv_48_8_t *) kv)->key[3];
438 reass->key.as_u64[4] = ((clib_bihash_kv_48_8_t *) kv)->key[4];
439 reass->key.as_u64[5] = ((clib_bihash_kv_48_8_t *) kv)->key[5];
440 kv->v.reass_index = (reass - rt->pool);
441 kv->v.thread_index = vm->thread_index;
442 reass->last_heard = now;
444 if (clib_bihash_add_del_48_8 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, 1))
446 ip6_reass_free (rm, rt, reass);
453 always_inline ip6_reass_rc_t
454 ip6_reass_finalize (vlib_main_t * vm, vlib_node_runtime_t * node,
455 ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
456 ip6_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
459 *bi0 = reass->first_bi;
460 *error0 = IP6_ERROR_NONE;
461 ip6_frag_hdr_t *frag_hdr;
462 vlib_buffer_t *last_b = NULL;
463 u32 sub_chain_bi = reass->first_bi;
464 u32 total_length = 0;
467 u32 *vec_drop_compress = NULL;
468 ip6_reass_rc_t rv = IP6_REASS_RC_OK;
471 u32 tmp_bi = sub_chain_bi;
472 vlib_buffer_t *tmp = vlib_get_buffer (vm, tmp_bi);
473 vnet_buffer_opaque_t *vnb = vnet_buffer (tmp);
474 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
475 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
477 rv = IP6_REASS_RC_INTERNAL_ERROR;
478 goto free_buffers_and_return;
481 u32 data_len = ip6_reass_buffer_get_data_len (tmp);
482 u32 trim_front = vnet_buffer (tmp)->ip.reass.ip6_frag_hdr_offset +
483 sizeof (*frag_hdr) + ip6_reass_buffer_get_data_offset (tmp);
485 vlib_buffer_length_in_chain (vm, tmp) - trim_front - data_len;
486 if (tmp_bi == reass->first_bi)
488 /* first buffer - keep ip6 header */
489 if (0 != ip6_reass_buffer_get_data_offset (tmp))
491 rv = IP6_REASS_RC_INTERNAL_ERROR;
492 goto free_buffers_and_return;
495 trim_end = vlib_buffer_length_in_chain (vm, tmp) - data_len -
496 (vnet_buffer (tmp)->ip.reass.ip6_frag_hdr_offset +
498 if (!(vlib_buffer_length_in_chain (vm, tmp) - trim_end > 0))
500 rv = IP6_REASS_RC_INTERNAL_ERROR;
501 goto free_buffers_and_return;
505 vlib_buffer_length_in_chain (vm, tmp) - trim_front - trim_end;
511 if (trim_front > tmp->current_length)
513 /* drop whole buffer */
514 vec_add1 (vec_drop_compress, tmp_bi);
515 trim_front -= tmp->current_length;
516 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
518 rv = IP6_REASS_RC_INTERNAL_ERROR;
519 goto free_buffers_and_return;
521 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
522 tmp_bi = tmp->next_buffer;
523 tmp = vlib_get_buffer (vm, tmp_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 rv = IP6_REASS_RC_INTERNAL_ERROR;
551 goto free_buffers_and_return;
554 total_length += tmp->current_length;
558 vec_add1 (vec_drop_compress, tmp_bi);
559 if (reass->first_bi == tmp_bi)
561 rv = IP6_REASS_RC_INTERNAL_ERROR;
562 goto free_buffers_and_return;
566 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
568 tmp_bi = tmp->next_buffer;
569 tmp = vlib_get_buffer (vm, tmp->next_buffer);
577 vnet_buffer (vlib_get_buffer (vm, sub_chain_bi))->ip.
580 while (~0 != sub_chain_bi);
584 rv = IP6_REASS_RC_INTERNAL_ERROR;
585 goto free_buffers_and_return;
587 last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
588 vlib_buffer_t *first_b = vlib_get_buffer (vm, reass->first_bi);
589 if (total_length < first_b->current_length)
591 rv = IP6_REASS_RC_INTERNAL_ERROR;
592 goto free_buffers_and_return;
594 total_length -= first_b->current_length;
595 first_b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
596 first_b->total_length_not_including_first_buffer = total_length;
597 // drop fragment header
598 vnet_buffer_opaque_t *first_b_vnb = vnet_buffer (first_b);
599 ip6_header_t *ip = vlib_buffer_get_current (first_b);
600 u16 ip6_frag_hdr_offset = first_b_vnb->ip.reass.ip6_frag_hdr_offset;
601 ip6_ext_header_t *prev_hdr;
602 ip6_ext_header_find_t (ip, prev_hdr, frag_hdr,
603 IP_PROTOCOL_IPV6_FRAGMENTATION);
606 prev_hdr->next_hdr = frag_hdr->next_hdr;
610 ip->protocol = frag_hdr->next_hdr;
612 if (!((u8 *) frag_hdr - (u8 *) ip == ip6_frag_hdr_offset))
614 rv = IP6_REASS_RC_INTERNAL_ERROR;
615 goto free_buffers_and_return;
617 memmove (frag_hdr, (u8 *) frag_hdr + sizeof (*frag_hdr),
618 first_b->current_length - ip6_frag_hdr_offset -
619 sizeof (ip6_frag_hdr_t));
620 first_b->current_length -= sizeof (*frag_hdr);
622 clib_host_to_net_u16 (total_length + first_b->current_length -
624 if (!vlib_buffer_chain_linearize (vm, first_b))
626 rv = IP6_REASS_RC_NO_BUF;
627 goto free_buffers_and_return;
629 if (PREDICT_FALSE (first_b->flags & VLIB_BUFFER_IS_TRACED))
631 ip6_reass_add_trace (vm, node, rm, reass, reass->first_bi, FINALIZE, 0);
633 // following code does a hexdump of packet fragments to stdout ...
636 u32 bi = reass->first_bi;
640 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
641 s = format (s, "%u: %U\n", bi, format_hexdump,
642 vlib_buffer_get_current (b), b->current_length);
643 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
652 printf ("%.*s\n", vec_len (s), s);
661 *next0 = IP6_REASSEMBLY_NEXT_INPUT;
665 *next0 = reass->next_index;
667 vnet_buffer (first_b)->ip.reass.estimated_mtu = reass->min_fragment_length;
668 ip6_reass_free (rm, rt, reass);
670 free_buffers_and_return:
671 vlib_buffer_free (vm, vec_drop_compress, vec_len (vec_drop_compress));
672 vec_free (vec_drop_compress);
677 ip6_reass_insert_range_in_chain (vlib_main_t * vm, ip6_reass_main_t * rm,
678 ip6_reass_per_thread_t * rt,
679 ip6_reass_t * reass, u32 prev_range_bi,
683 vlib_buffer_t *new_next_b = vlib_get_buffer (vm, new_next_bi);
684 vnet_buffer_opaque_t *new_next_vnb = vnet_buffer (new_next_b);
685 if (~0 != prev_range_bi)
687 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
688 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
689 new_next_vnb->ip.reass.next_range_bi = prev_vnb->ip.reass.next_range_bi;
690 prev_vnb->ip.reass.next_range_bi = new_next_bi;
694 if (~0 != reass->first_bi)
696 new_next_vnb->ip.reass.next_range_bi = reass->first_bi;
698 reass->first_bi = new_next_bi;
700 reass->data_len += ip6_reass_buffer_get_data_len (new_next_b);
703 always_inline ip6_reass_rc_t
704 ip6_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
705 ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
706 ip6_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
707 ip6_frag_hdr_t * frag_hdr, bool is_feature)
710 vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0);
711 vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
712 reass->next_index = fvnb->ip.reass.next_index; // store next_index before it's overwritten
713 fvnb->ip.reass.ip6_frag_hdr_offset =
714 (u8 *) frag_hdr - (u8 *) vlib_buffer_get_current (fb);
715 ip6_header_t *fip = vlib_buffer_get_current (fb);
716 if (fb->current_length < sizeof (*fip) ||
717 fvnb->ip.reass.ip6_frag_hdr_offset == 0 ||
718 fvnb->ip.reass.ip6_frag_hdr_offset >= fb->current_length)
720 return IP6_REASS_RC_INTERNAL_ERROR;
723 u32 fragment_first = fvnb->ip.reass.fragment_first =
724 ip6_frag_hdr_offset_bytes (frag_hdr);
725 u32 fragment_length =
726 vlib_buffer_length_in_chain (vm, fb) -
727 (fvnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
728 u32 fragment_last = fvnb->ip.reass.fragment_last =
729 fragment_first + fragment_length - 1;
730 int more_fragments = ip6_frag_hdr_more (frag_hdr);
731 u32 candidate_range_bi = reass->first_bi;
732 u32 prev_range_bi = ~0;
733 fvnb->ip.reass.range_first = fragment_first;
734 fvnb->ip.reass.range_last = fragment_last;
735 fvnb->ip.reass.next_range_bi = ~0;
738 reass->last_packet_octet = fragment_last;
740 if (~0 == reass->first_bi)
742 // starting a new reassembly
743 ip6_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
745 reass->min_fragment_length = clib_net_to_host_u16 (fip->payload_length);
747 goto check_if_done_maybe;
749 reass->min_fragment_length =
750 clib_min (clib_net_to_host_u16 (fip->payload_length),
751 fvnb->ip.reass.estimated_mtu);
752 while (~0 != candidate_range_bi)
754 vlib_buffer_t *candidate_b = vlib_get_buffer (vm, candidate_range_bi);
755 vnet_buffer_opaque_t *candidate_vnb = vnet_buffer (candidate_b);
756 if (fragment_first > candidate_vnb->ip.reass.range_last)
758 // this fragments starts after candidate range
759 prev_range_bi = candidate_range_bi;
760 candidate_range_bi = candidate_vnb->ip.reass.next_range_bi;
761 if (candidate_vnb->ip.reass.range_last < fragment_last &&
762 ~0 == candidate_range_bi)
764 // special case - this fragment falls beyond all known ranges
765 ip6_reass_insert_range_in_chain (vm, rm, rt, reass,
766 prev_range_bi, *bi0);
772 if (fragment_last < candidate_vnb->ip.reass.range_first)
774 // this fragment ends before candidate range without any overlap
775 ip6_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
779 else if (fragment_first == candidate_vnb->ip.reass.range_first &&
780 fragment_last == candidate_vnb->ip.reass.range_last)
782 // duplicate fragment - ignore
786 // overlapping fragment - not allowed by RFC 8200
787 ip6_reass_drop_all (vm, rm, reass);
788 ip6_reass_free (rm, rt, reass);
789 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
791 ip6_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_OVERLAP,
794 *next0 = IP6_REASSEMBLY_NEXT_DROP;
795 *error0 = IP6_ERROR_REASS_OVERLAPPING_FRAGMENT;
796 return IP6_REASS_RC_OK;
803 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
805 ip6_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0);
808 if (~0 != reass->last_packet_octet &&
809 reass->data_len == reass->last_packet_octet + 1)
811 return ip6_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0,
822 *next0 = IP6_REASSEMBLY_NEXT_DROP;
823 *error0 = IP6_ERROR_REASS_DUPLICATE_FRAGMENT;
826 return IP6_REASS_RC_OK;
830 ip6_reass_verify_upper_layer_present (vlib_node_runtime_t * node,
832 ip6_frag_hdr_t * frag_hdr)
834 ip6_ext_header_t *tmp = (ip6_ext_header_t *) frag_hdr;
835 while (ip6_ext_hdr (tmp->next_hdr))
837 tmp = ip6_ext_next_header (tmp);
839 if (IP_PROTOCOL_IP6_NONXT == tmp->next_hdr)
841 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
842 ICMP6_parameter_problem_first_fragment_has_incomplete_header_chain,
844 b->error = node->errors[IP6_ERROR_REASS_MISSING_UPPER];
852 ip6_reass_verify_fragment_multiple_8 (vlib_main_t * vm,
853 vlib_node_runtime_t * node,
855 ip6_frag_hdr_t * frag_hdr)
857 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
858 ip6_header_t *ip = vlib_buffer_get_current (b);
859 int more_fragments = ip6_frag_hdr_more (frag_hdr);
860 u32 fragment_length =
861 vlib_buffer_length_in_chain (vm, b) -
862 (vnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
863 if (more_fragments && 0 != fragment_length % 8)
865 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
866 ICMP6_parameter_problem_erroneous_header_field,
867 (u8 *) & ip->payload_length - (u8 *) ip);
874 ip6_reass_verify_packet_size_lt_64k (vlib_main_t * vm,
875 vlib_node_runtime_t * node,
877 ip6_frag_hdr_t * frag_hdr)
879 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
880 u32 fragment_first = ip6_frag_hdr_offset_bytes (frag_hdr);
881 u32 fragment_length =
882 vlib_buffer_length_in_chain (vm, b) -
883 (vnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
884 if (fragment_first + fragment_length > 65535)
886 ip6_header_t *ip0 = vlib_buffer_get_current (b);
887 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
888 ICMP6_parameter_problem_erroneous_header_field,
889 (u8 *) & frag_hdr->fragment_offset_and_more
897 ip6_reassembly_inline (vlib_main_t * vm,
898 vlib_node_runtime_t * node,
899 vlib_frame_t * frame, bool is_feature)
901 u32 *from = vlib_frame_vector_args (frame);
902 u32 n_left_from, n_left_to_next, *to_next, next_index;
903 ip6_reass_main_t *rm = &ip6_reass_main;
904 ip6_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
905 clib_spinlock_lock (&rt->lock);
907 n_left_from = frame->n_vectors;
908 next_index = node->cached_next_index;
909 while (n_left_from > 0)
911 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
913 while (n_left_from > 0 && n_left_to_next > 0)
917 u32 next0 = IP6_REASSEMBLY_NEXT_DROP;
918 u32 error0 = IP6_ERROR_NONE;
922 b0 = vlib_get_buffer (vm, bi0);
924 ip6_header_t *ip0 = vlib_buffer_get_current (b0);
925 ip6_frag_hdr_t *frag_hdr = NULL;
926 ip6_ext_header_t *prev_hdr;
927 if (ip6_ext_hdr (ip0->protocol))
929 ip6_ext_header_find_t (ip0, prev_hdr, frag_hdr,
930 IP_PROTOCOL_IPV6_FRAGMENTATION);
934 // this is a regular packet - no fragmentation
935 next0 = IP6_REASSEMBLY_NEXT_INPUT;
938 if (0 == ip6_frag_hdr_offset (frag_hdr))
940 // first fragment - verify upper-layer is present
941 if (!ip6_reass_verify_upper_layer_present (node, b0, frag_hdr))
943 next0 = IP6_REASSEMBLY_NEXT_ICMP_ERROR;
947 if (!ip6_reass_verify_fragment_multiple_8 (vm, node, b0, frag_hdr)
948 || !ip6_reass_verify_packet_size_lt_64k (vm, node, b0,
951 next0 = IP6_REASSEMBLY_NEXT_ICMP_ERROR;
954 vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset =
955 (u8 *) frag_hdr - (u8 *) ip0;
960 kv.k.as_u64[0] = ip0->src_address.as_u64[0];
961 kv.k.as_u64[1] = ip0->src_address.as_u64[1];
962 kv.k.as_u64[2] = ip0->dst_address.as_u64[0];
963 kv.k.as_u64[3] = ip0->dst_address.as_u64[1];
965 ((u64) vec_elt (ip6_main.fib_index_by_sw_if_index,
966 vnet_buffer (b0)->sw_if_index[VLIB_RX])) << 32 |
967 (u64) frag_hdr->identification;
968 kv.k.as_u64[5] = ip0->protocol;
971 ip6_reass_find_or_create (vm, node, rm, rt, &kv, &icmp_bi,
974 if (PREDICT_FALSE (do_handoff))
976 next0 = IP6_REASSEMBLY_NEXT_HANDOFF;
978 vnet_buffer (b0)->ip.reass.owner_feature_thread_index =
981 vnet_buffer (b0)->ip.reass.owner_thread_index =
986 switch (ip6_reass_update (vm, node, rm, rt, reass, &bi0, &next0,
987 &error0, frag_hdr, is_feature))
989 case IP6_REASS_RC_OK:
990 /* nothing to do here */
992 case IP6_REASS_RC_NO_BUF:
994 case IP6_REASS_RC_INTERNAL_ERROR:
995 /* drop everything and start with a clean slate */
996 ip6_reass_drop_all (vm, rm, reass);
997 ip6_reass_free (rm, rt, reass);
1004 next0 = IP6_REASSEMBLY_NEXT_DROP;
1005 error0 = IP6_ERROR_REASS_LIMIT_REACHED;
1008 b0->error = node->errors[error0];
1015 n_left_to_next -= 1;
1016 if (is_feature && IP6_ERROR_NONE == error0)
1018 b0 = vlib_get_buffer (vm, bi0);
1019 vnet_feature_next (&next0, b0);
1021 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1022 n_left_to_next, bi0, next0);
1027 next0 = IP6_REASSEMBLY_NEXT_ICMP_ERROR;
1028 to_next[0] = icmp_bi;
1030 n_left_to_next -= 1;
1031 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1032 n_left_to_next, icmp_bi,
1040 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1043 clib_spinlock_unlock (&rt->lock);
1044 return frame->n_vectors;
1047 static char *ip6_reassembly_error_strings[] = {
1048 #define _(sym, string) string,
1053 VLIB_NODE_FN (ip6_reass_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1054 vlib_frame_t * frame)
1056 return ip6_reassembly_inline (vm, node, frame, false /* is_feature */ );
1060 VLIB_REGISTER_NODE (ip6_reass_node) = {
1061 .name = "ip6-reassembly",
1062 .vector_size = sizeof (u32),
1063 .format_trace = format_ip6_reass_trace,
1064 .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
1065 .error_strings = ip6_reassembly_error_strings,
1066 .n_next_nodes = IP6_REASSEMBLY_N_NEXT,
1069 [IP6_REASSEMBLY_NEXT_INPUT] = "ip6-input",
1070 [IP6_REASSEMBLY_NEXT_DROP] = "ip6-drop",
1071 [IP6_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
1072 [IP6_REASSEMBLY_NEXT_HANDOFF] = "ip6-reassembly-handoff",
1077 VLIB_NODE_FN (ip6_reass_node_feature) (vlib_main_t * vm,
1078 vlib_node_runtime_t * node,
1079 vlib_frame_t * frame)
1081 return ip6_reassembly_inline (vm, node, frame, true /* is_feature */ );
1085 VLIB_REGISTER_NODE (ip6_reass_node_feature) = {
1086 .name = "ip6-reassembly-feature",
1087 .vector_size = sizeof (u32),
1088 .format_trace = format_ip6_reass_trace,
1089 .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
1090 .error_strings = ip6_reassembly_error_strings,
1091 .n_next_nodes = IP6_REASSEMBLY_N_NEXT,
1094 [IP6_REASSEMBLY_NEXT_INPUT] = "ip6-input",
1095 [IP6_REASSEMBLY_NEXT_DROP] = "ip6-drop",
1096 [IP6_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
1097 [IP6_REASSEMBLY_NEXT_HANDOFF] = "ip6-reass-feature-hoff",
1103 VNET_FEATURE_INIT (ip6_reassembly_feature, static) = {
1104 .arc_name = "ip6-unicast",
1105 .node_name = "ip6-reassembly-feature",
1106 .runs_before = VNET_FEATURES ("ip6-lookup"),
1111 #ifndef CLIB_MARCH_VARIANT
1113 ip6_reass_get_nbuckets ()
1115 ip6_reass_main_t *rm = &ip6_reass_main;
1119 nbuckets = (u32) (rm->max_reass_n / IP6_REASS_HT_LOAD_FACTOR);
1121 for (i = 0; i < 31; i++)
1122 if ((1 << i) >= nbuckets)
1128 #endif /* CLIB_MARCH_VARIANT */
1132 IP6_EVENT_CONFIG_CHANGED = 1,
1133 } ip6_reass_event_t;
1135 #ifndef CLIB_MARCH_VARIANT
1139 clib_bihash_48_8_t *new_hash;
1140 } ip6_rehash_cb_ctx;
1143 ip6_rehash_cb (clib_bihash_kv_48_8_t * kv, void *_ctx)
1145 ip6_rehash_cb_ctx *ctx = _ctx;
1146 if (clib_bihash_add_del_48_8 (ctx->new_hash, kv, 1))
1153 ip6_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
1154 u32 expire_walk_interval_ms)
1156 ip6_reass_main.timeout_ms = timeout_ms;
1157 ip6_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
1158 ip6_reass_main.max_reass_n = max_reassemblies;
1159 ip6_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
1163 ip6_reass_set (u32 timeout_ms, u32 max_reassemblies,
1164 u32 expire_walk_interval_ms)
1166 u32 old_nbuckets = ip6_reass_get_nbuckets ();
1167 ip6_reass_set_params (timeout_ms, max_reassemblies,
1168 expire_walk_interval_ms);
1169 vlib_process_signal_event (ip6_reass_main.vlib_main,
1170 ip6_reass_main.ip6_reass_expire_node_idx,
1171 IP6_EVENT_CONFIG_CHANGED, 0);
1172 u32 new_nbuckets = ip6_reass_get_nbuckets ();
1173 if (ip6_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
1175 clib_bihash_48_8_t new_hash;
1176 clib_memset (&new_hash, 0, sizeof (new_hash));
1177 ip6_rehash_cb_ctx ctx;
1179 ctx.new_hash = &new_hash;
1180 clib_bihash_init_48_8 (&new_hash, "ip6-reass", new_nbuckets,
1181 new_nbuckets * 1024);
1182 clib_bihash_foreach_key_value_pair_48_8 (&ip6_reass_main.hash,
1183 ip6_rehash_cb, &ctx);
1186 clib_bihash_free_48_8 (&new_hash);
1191 clib_bihash_free_48_8 (&ip6_reass_main.hash);
1192 clib_memcpy_fast (&ip6_reass_main.hash, &new_hash,
1193 sizeof (ip6_reass_main.hash));
1200 ip6_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
1201 u32 * expire_walk_interval_ms)
1203 *timeout_ms = ip6_reass_main.timeout_ms;
1204 *max_reassemblies = ip6_reass_main.max_reass_n;
1205 *expire_walk_interval_ms = ip6_reass_main.expire_walk_interval_ms;
1209 static clib_error_t *
1210 ip6_reass_init_function (vlib_main_t * vm)
1212 ip6_reass_main_t *rm = &ip6_reass_main;
1213 clib_error_t *error = 0;
1218 rm->vnet_main = vnet_get_main ();
1220 vec_validate (rm->per_thread_data, vlib_num_workers ());
1221 ip6_reass_per_thread_t *rt;
1222 vec_foreach (rt, rm->per_thread_data)
1224 clib_spinlock_init (&rt->lock);
1225 pool_alloc (rt->pool, rm->max_reass_n);
1228 node = vlib_get_node_by_name (vm, (u8 *) "ip6-reassembly-expire-walk");
1230 rm->ip6_reass_expire_node_idx = node->index;
1232 ip6_reass_set_params (IP6_REASS_TIMEOUT_DEFAULT_MS,
1233 IP6_REASS_MAX_REASSEMBLIES_DEFAULT,
1234 IP6_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
1236 nbuckets = ip6_reass_get_nbuckets ();
1237 clib_bihash_init_48_8 (&rm->hash, "ip6-reass", nbuckets, nbuckets * 1024);
1239 node = vlib_get_node_by_name (vm, (u8 *) "ip6-drop");
1241 rm->ip6_drop_idx = node->index;
1242 node = vlib_get_node_by_name (vm, (u8 *) "ip6-icmp-error");
1244 rm->ip6_icmp_error_idx = node->index;
1246 if ((error = vlib_call_init_function (vm, ip_main_init)))
1248 ip6_register_protocol (IP_PROTOCOL_IPV6_FRAGMENTATION,
1249 ip6_reass_node.index);
1251 rm->fq_index = vlib_frame_queue_main_init (ip6_reass_node.index, 0);
1252 rm->fq_feature_index =
1253 vlib_frame_queue_main_init (ip6_reass_node_feature.index, 0);
1258 VLIB_INIT_FUNCTION (ip6_reass_init_function);
1259 #endif /* CLIB_MARCH_VARIANT */
1262 ip6_reass_walk_expired (vlib_main_t * vm,
1263 vlib_node_runtime_t * node, vlib_frame_t * f)
1265 ip6_reass_main_t *rm = &ip6_reass_main;
1266 uword event_type, *event_data = 0;
1270 vlib_process_wait_for_event_or_clock (vm,
1271 (f64) rm->expire_walk_interval_ms
1272 / (f64) MSEC_PER_SEC);
1273 event_type = vlib_process_get_events (vm, &event_data);
1277 case ~0: /* no events => timeout */
1278 /* nothing to do here */
1280 case IP6_EVENT_CONFIG_CHANGED:
1283 clib_warning ("BUG: event type 0x%wx", event_type);
1286 f64 now = vlib_time_now (vm);
1289 int *pool_indexes_to_free = NULL;
1291 uword thread_index = 0;
1293 const uword nthreads = vlib_num_workers () + 1;
1294 u32 *vec_icmp_bi = NULL;
1295 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1297 ip6_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1298 clib_spinlock_lock (&rt->lock);
1300 vec_reset_length (pool_indexes_to_free);
1302 pool_foreach_index (index, rt->pool, ({
1303 reass = pool_elt_at_index (rt->pool, index);
1304 if (now > reass->last_heard + rm->timeout)
1306 vec_add1 (pool_indexes_to_free, index);
1312 vec_foreach (i, pool_indexes_to_free)
1314 ip6_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
1316 vlib_buffer_t *b = vlib_get_buffer (vm, reass->first_bi);
1317 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
1319 if (pool_is_free_index (vm->trace_main.trace_buffer_pool,
1322 /* the trace is gone, don't trace this buffer anymore */
1323 b->flags &= ~VLIB_BUFFER_IS_TRACED;
1326 ip6_reass_on_timeout (vm, node, rm, reass, &icmp_bi);
1329 vec_add1 (vec_icmp_bi, icmp_bi);
1331 ip6_reass_free (rm, rt, reass);
1335 clib_spinlock_unlock (&rt->lock);
1338 while (vec_len (vec_icmp_bi) > 0)
1341 vlib_get_frame_to_node (vm, rm->ip6_icmp_error_idx);
1342 u32 *to_next = vlib_frame_vector_args (f);
1343 u32 n_left_to_next = VLIB_FRAME_SIZE - f->n_vectors;
1344 int trace_frame = 0;
1345 while (vec_len (vec_icmp_bi) > 0 && n_left_to_next > 0)
1347 u32 bi = vec_pop (vec_icmp_bi);
1348 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
1349 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
1351 if (pool_is_free_index (vm->trace_main.trace_buffer_pool,
1354 /* the trace is gone, don't trace this buffer anymore */
1355 b->flags &= ~VLIB_BUFFER_IS_TRACED;
1362 b->error = node->errors[IP6_ERROR_REASS_TIMEOUT];
1366 n_left_to_next -= 1;
1368 f->frame_flags |= (trace_frame * VLIB_FRAME_TRACE);
1369 vlib_put_frame_to_node (vm, rm->ip6_icmp_error_idx, f);
1372 vec_free (pool_indexes_to_free);
1373 vec_free (vec_icmp_bi);
1376 _vec_len (event_data) = 0;
1384 VLIB_REGISTER_NODE (ip6_reass_expire_node, static) = {
1385 .function = ip6_reass_walk_expired,
1386 .format_trace = format_ip6_reass_trace,
1387 .type = VLIB_NODE_TYPE_PROCESS,
1388 .name = "ip6-reassembly-expire-walk",
1390 .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
1391 .error_strings = ip6_reassembly_error_strings,
1397 format_ip6_reass_key (u8 * s, va_list * args)
1399 ip6_reass_key_t *key = va_arg (*args, ip6_reass_key_t *);
1400 s = format (s, "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
1401 key->xx_id, format_ip6_address, &key->src, format_ip6_address,
1402 &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
1407 format_ip6_reass (u8 * s, va_list * args)
1409 vlib_main_t *vm = va_arg (*args, vlib_main_t *);
1410 ip6_reass_t *reass = va_arg (*args, ip6_reass_t *);
1412 s = format (s, "ID: %lu, key: %U\n first_bi: %u, data_len: %u, "
1413 "last_packet_octet: %u, trace_op_counter: %u\n",
1414 reass->id, format_ip6_reass_key, &reass->key, reass->first_bi,
1415 reass->data_len, reass->last_packet_octet,
1416 reass->trace_op_counter);
1417 u32 bi = reass->first_bi;
1421 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
1422 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
1423 s = format (s, " #%03u: range: [%u, %u], bi: %u, off: %d, len: %u, "
1424 "fragment[%u, %u]\n",
1425 counter, vnb->ip.reass.range_first,
1426 vnb->ip.reass.range_last, bi,
1427 ip6_reass_buffer_get_data_offset (b),
1428 ip6_reass_buffer_get_data_len (b),
1429 vnb->ip.reass.fragment_first, vnb->ip.reass.fragment_last);
1430 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
1432 bi = b->next_buffer;
1442 static clib_error_t *
1443 show_ip6_reass (vlib_main_t * vm, unformat_input_t * input,
1444 CLIB_UNUSED (vlib_cli_command_t * lmd))
1446 ip6_reass_main_t *rm = &ip6_reass_main;
1448 vlib_cli_output (vm, "---------------------");
1449 vlib_cli_output (vm, "IP6 reassembly status");
1450 vlib_cli_output (vm, "---------------------");
1451 bool details = false;
1452 if (unformat (input, "details"))
1457 u32 sum_reass_n = 0;
1458 u64 sum_buffers_n = 0;
1461 const uword nthreads = vlib_num_workers () + 1;
1462 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1464 ip6_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1465 clib_spinlock_lock (&rt->lock);
1469 pool_foreach (reass, rt->pool, {
1470 vlib_cli_output (vm, "%U", format_ip6_reass, vm, reass);
1474 sum_reass_n += rt->reass_n;
1475 clib_spinlock_unlock (&rt->lock);
1477 vlib_cli_output (vm, "---------------------");
1478 vlib_cli_output (vm, "Current IP6 reassemblies count: %lu\n",
1479 (long unsigned) sum_reass_n);
1480 vlib_cli_output (vm, "Maximum configured concurrent IP6 reassemblies per "
1481 "worker-thread: %lu\n", (long unsigned) rm->max_reass_n);
1482 vlib_cli_output (vm, "Buffers in use: %lu\n",
1483 (long unsigned) sum_buffers_n);
1488 VLIB_CLI_COMMAND (show_ip6_reassembly_cmd, static) = {
1489 .path = "show ip6-reassembly",
1490 .short_help = "show ip6-reassembly [details]",
1491 .function = show_ip6_reass,
1495 #ifndef CLIB_MARCH_VARIANT
1497 ip6_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
1499 return vnet_feature_enable_disable ("ip6-unicast", "ip6-reassembly-feature",
1500 sw_if_index, enable_disable, 0, 0);
1502 #endif /* CLIB_MARCH_VARIANT */
1504 #define foreach_ip6_reassembly_handoff_error \
1505 _(CONGESTION_DROP, "congestion drop")
1510 #define _(sym,str) IP6_REASSEMBLY_HANDOFF_ERROR_##sym,
1511 foreach_ip6_reassembly_handoff_error
1513 IP6_REASSEMBLY_HANDOFF_N_ERROR,
1514 } ip6_reassembly_handoff_error_t;
1516 static char *ip6_reassembly_handoff_error_strings[] = {
1517 #define _(sym,string) string,
1518 foreach_ip6_reassembly_handoff_error
1524 u32 next_worker_index;
1525 } ip6_reassembly_handoff_trace_t;
1528 format_ip6_reassembly_handoff_trace (u8 * s, va_list * args)
1530 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1531 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1532 ip6_reassembly_handoff_trace_t *t =
1533 va_arg (*args, ip6_reassembly_handoff_trace_t *);
1536 format (s, "ip6-reassembly-handoff: next-worker %d",
1537 t->next_worker_index);
1543 ip6_reassembly_handoff_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1544 vlib_frame_t * frame, bool is_feature)
1546 ip6_reass_main_t *rm = &ip6_reass_main;
1548 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1549 u32 n_enq, n_left_from, *from;
1550 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
1553 from = vlib_frame_vector_args (frame);
1554 n_left_from = frame->n_vectors;
1555 vlib_get_buffers (vm, from, bufs, n_left_from);
1558 ti = thread_indices;
1560 fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
1562 while (n_left_from > 0)
1565 (is_feature) ? vnet_buffer (b[0])->ip.
1566 reass.owner_feature_thread_index : vnet_buffer (b[0])->ip.
1567 reass.owner_thread_index;
1570 ((node->flags & VLIB_NODE_FLAG_TRACE)
1571 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1573 ip6_reassembly_handoff_trace_t *t =
1574 vlib_add_trace (vm, node, b[0], sizeof (*t));
1575 t->next_worker_index = ti[0];
1583 vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
1584 frame->n_vectors, 1);
1586 if (n_enq < frame->n_vectors)
1587 vlib_node_increment_counter (vm, node->node_index,
1588 IP6_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
1589 frame->n_vectors - n_enq);
1590 return frame->n_vectors;
1593 VLIB_NODE_FN (ip6_reassembly_handoff_node) (vlib_main_t * vm,
1594 vlib_node_runtime_t * node,
1595 vlib_frame_t * frame)
1597 return ip6_reassembly_handoff_inline (vm, node, frame,
1598 false /* is_feature */ );
1602 VLIB_REGISTER_NODE (ip6_reassembly_handoff_node) = {
1603 .name = "ip6-reassembly-handoff",
1604 .vector_size = sizeof (u32),
1605 .n_errors = ARRAY_LEN(ip6_reassembly_handoff_error_strings),
1606 .error_strings = ip6_reassembly_handoff_error_strings,
1607 .format_trace = format_ip6_reassembly_handoff_trace,
1617 VLIB_NODE_FN (ip6_reassembly_feature_handoff_node) (vlib_main_t * vm,
1618 vlib_node_runtime_t * node, vlib_frame_t * frame)
1620 return ip6_reassembly_handoff_inline (vm, node, frame, true /* is_feature */ );
1625 VLIB_REGISTER_NODE (ip6_reassembly_feature_handoff_node) = {
1626 .name = "ip6-reass-feature-hoff",
1627 .vector_size = sizeof (u32),
1628 .n_errors = ARRAY_LEN(ip6_reassembly_handoff_error_strings),
1629 .error_strings = ip6_reassembly_handoff_error_strings,
1630 .format_trace = format_ip6_reassembly_handoff_trace,
1641 * fd.io coding-style-patch-verification: ON
1644 * eval: (c-set-style "gnu")