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_MAX_REASSEMBLY_LENGTH_DEFAULT 3
34 #define IP6_REASS_HT_LOAD_FACTOR (0.75)
39 IP6_REASS_RC_INTERNAL_ERROR,
40 IP6_REASS_RC_TOO_MANY_FRAGMENTS,
78 clib_bihash_kv_48_8_t kv;
83 ip6_reass_buffer_get_data_offset (vlib_buffer_t * b)
85 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
86 return vnb->ip.reass.range_first - vnb->ip.reass.fragment_first;
90 ip6_reass_buffer_get_data_len (vlib_buffer_t * b)
92 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
93 return clib_min (vnb->ip.reass.range_last, vnb->ip.reass.fragment_last) -
94 (vnb->ip.reass.fragment_first + ip6_reass_buffer_get_data_offset (b)) + 1;
101 // time when last packet was received
103 // internal id of this reassembly
105 // buffer index of first buffer in this reassembly context
107 // last octet of packet, ~0 until fragment without more_fragments arrives
108 u32 last_packet_octet;
109 // length of data collected so far
111 // trace operation counter
112 u32 trace_op_counter;
113 // next index - used by custom apps (~0 if not set)
115 // error next index - used by custom apps (~0 if not set)
116 u32 error_next_index;
117 // minimum fragment length for this reassembly - used to estimate MTU
118 u16 min_fragment_length;
119 // number of fragments for this reassembly
128 clib_spinlock_t lock;
129 } ip6_reass_per_thread_t;
136 u32 expire_walk_interval_ms;
137 // maximum number of fragments in one reassembly
139 // maximum number of reassemblies
143 clib_bihash_48_8_t hash;
146 ip6_reass_per_thread_t *per_thread_data;
149 vlib_main_t *vlib_main;
150 vnet_main_t *vnet_main;
152 // node index of ip6-drop node
154 u32 ip6_icmp_error_idx;
155 u32 ip6_reass_expire_node_idx;
157 /** Worker handoff */
159 u32 fq_feature_index;
163 extern ip6_reass_main_t ip6_reass_main;
165 #ifndef CLIB_MARCH_VARIANT
166 ip6_reass_main_t ip6_reass_main;
167 #endif /* CLIB_MARCH_VARIANT */
171 IP6_REASSEMBLY_NEXT_INPUT,
172 IP6_REASSEMBLY_NEXT_DROP,
173 IP6_REASSEMBLY_NEXT_ICMP_ERROR,
174 IP6_REASSEMBLY_NEXT_HANDOFF,
175 IP6_REASSEMBLY_N_NEXT,
182 ICMP_ERROR_RT_EXCEEDED,
183 ICMP_ERROR_FL_TOO_BIG,
184 ICMP_ERROR_FL_NOT_MULT_8,
186 } ip6_reass_trace_operation_e;
196 } ip6_reass_range_trace_t;
200 ip6_reass_trace_operation_e action;
202 ip6_reass_range_trace_t trace_range;
211 ip6_reass_trace_details (vlib_main_t * vm, u32 bi,
212 ip6_reass_range_trace_t * trace)
214 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
215 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
216 trace->range_first = vnb->ip.reass.range_first;
217 trace->range_last = vnb->ip.reass.range_last;
218 trace->data_offset = ip6_reass_buffer_get_data_offset (b);
219 trace->data_len = ip6_reass_buffer_get_data_len (b);
220 trace->range_bi = bi;
224 format_ip6_reass_range_trace (u8 * s, va_list * args)
226 ip6_reass_range_trace_t *trace = va_arg (*args, ip6_reass_range_trace_t *);
227 s = format (s, "range: [%u, %u], off %d, len %u, bi %u", trace->range_first,
228 trace->range_last, trace->data_offset, trace->data_len,
234 format_ip6_reass_trace (u8 * s, va_list * args)
236 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
237 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
238 ip6_reass_trace_t *t = va_arg (*args, ip6_reass_trace_t *);
239 s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
240 u32 indent = format_get_indent (s);
241 s = format (s, "first bi: %u, data len: %u, ip/fragment[%u, %u]",
242 t->trace_range.first_bi, t->total_data_len, t->fragment_first,
247 s = format (s, "\n%Unew %U", format_white_space, indent,
248 format_ip6_reass_range_trace, &t->trace_range);
251 s = format (s, "\n%Uoverlap %U", format_white_space, indent,
252 format_ip6_reass_range_trace, &t->trace_range);
254 case ICMP_ERROR_FL_TOO_BIG:
255 s = format (s, "\n%Uicmp-error - frag_len > 65535 %U",
256 format_white_space, indent, format_ip6_reass_range_trace,
259 case ICMP_ERROR_FL_NOT_MULT_8:
260 s = format (s, "\n%Uicmp-error - frag_len mod 8 != 0 %U",
261 format_white_space, indent, format_ip6_reass_range_trace,
264 case ICMP_ERROR_RT_EXCEEDED:
265 s = format (s, "\n%Uicmp-error - reassembly time exceeded",
266 format_white_space, indent);
269 s = format (s, "\n%Ufinalize reassembly", format_white_space, indent);
276 ip6_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
277 ip6_reass_main_t * rm, ip6_reass_t * reass,
278 u32 bi, ip6_reass_trace_operation_e action,
281 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
282 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
283 ip6_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
284 t->reass_id = reass->id;
286 ip6_reass_trace_details (vm, bi, &t->trace_range);
287 t->size_diff = size_diff;
288 t->op_id = reass->trace_op_counter;
289 ++reass->trace_op_counter;
290 t->fragment_first = vnb->ip.reass.fragment_first;
291 t->fragment_last = vnb->ip.reass.fragment_last;
292 t->trace_range.first_bi = reass->first_bi;
293 t->total_data_len = reass->data_len;
296 s = format (s, "%U", format_ip6_reass_trace, NULL, NULL, t);
297 printf ("%.*s\n", vec_len (s), s);
299 vec_reset_length (s);
304 ip6_reass_free (ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
307 clib_bihash_kv_48_8_t kv;
308 kv.key[0] = reass->key.as_u64[0];
309 kv.key[1] = reass->key.as_u64[1];
310 kv.key[2] = reass->key.as_u64[2];
311 kv.key[3] = reass->key.as_u64[3];
312 kv.key[4] = reass->key.as_u64[4];
313 kv.key[5] = reass->key.as_u64[5];
314 clib_bihash_add_del_48_8 (&rm->hash, &kv, 0);
315 pool_put (rt->pool, reass);
320 ip6_reass_drop_all (vlib_main_t * vm, vlib_node_runtime_t * node,
321 ip6_reass_main_t * rm, ip6_reass_t * reass)
323 u32 range_bi = reass->first_bi;
324 vlib_buffer_t *range_b;
325 vnet_buffer_opaque_t *range_vnb;
327 while (~0 != range_bi)
329 range_b = vlib_get_buffer (vm, range_bi);
330 range_vnb = vnet_buffer (range_b);
334 vec_add1 (to_free, bi);
335 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
336 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
339 b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
346 range_bi = range_vnb->ip.reass.next_range_bi;
348 /* send to next_error_index */
349 if (~0 != reass->error_next_index)
351 u32 n_left_to_next, *to_next, next_index;
353 next_index = reass->error_next_index;
356 while (vec_len (to_free) > 0)
358 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
360 while (vec_len (to_free) > 0 && n_left_to_next > 0)
362 bi = vec_pop (to_free);
369 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
370 to_next, n_left_to_next,
374 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
379 vlib_buffer_free (vm, to_free, vec_len (to_free));
385 ip6_reass_on_timeout (vlib_main_t * vm, vlib_node_runtime_t * node,
386 ip6_reass_main_t * rm, ip6_reass_t * reass,
389 if (~0 == reass->first_bi)
393 if (~0 == reass->next_index) // custom apps don't want icmp
395 vlib_buffer_t *b = vlib_get_buffer (vm, reass->first_bi);
396 if (0 == vnet_buffer (b)->ip.reass.fragment_first)
398 *icmp_bi = reass->first_bi;
399 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
401 ip6_reass_add_trace (vm, node, rm, reass, reass->first_bi,
402 ICMP_ERROR_RT_EXCEEDED, 0);
404 // fragment with offset zero received - send icmp message back
405 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
407 // separate first buffer from chain and steer it towards icmp node
408 b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
409 reass->first_bi = b->next_buffer;
413 reass->first_bi = vnet_buffer (b)->ip.reass.next_range_bi;
415 icmp6_error_set_vnet_buffer (b, ICMP6_time_exceeded,
416 ICMP6_time_exceeded_fragment_reassembly_time_exceeded,
420 ip6_reass_drop_all (vm, node, rm, reass);
423 always_inline ip6_reass_t *
424 ip6_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
425 ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
426 ip6_reass_kv_t * kv, u32 * icmp_bi, u8 * do_handoff)
428 ip6_reass_t *reass = NULL;
429 f64 now = vlib_time_now (rm->vlib_main);
431 if (!clib_bihash_search_48_8
432 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, (clib_bihash_kv_48_8_t *) kv))
434 if (vm->thread_index != kv->v.thread_index)
439 reass = pool_elt_at_index (rt->pool, kv->v.reass_index);
441 if (now > reass->last_heard + rm->timeout)
443 ip6_reass_on_timeout (vm, node, rm, reass, icmp_bi);
444 ip6_reass_free (rm, rt, reass);
451 reass->last_heard = now;
455 if (rt->reass_n >= rm->max_reass_n)
462 pool_get (rt->pool, reass);
463 clib_memset (reass, 0, sizeof (*reass));
464 reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
466 reass->first_bi = ~0;
467 reass->last_packet_octet = ~0;
469 reass->next_index = ~0;
470 reass->error_next_index = ~0;
474 reass->key.as_u64[0] = ((clib_bihash_kv_48_8_t *) kv)->key[0];
475 reass->key.as_u64[1] = ((clib_bihash_kv_48_8_t *) kv)->key[1];
476 reass->key.as_u64[2] = ((clib_bihash_kv_48_8_t *) kv)->key[2];
477 reass->key.as_u64[3] = ((clib_bihash_kv_48_8_t *) kv)->key[3];
478 reass->key.as_u64[4] = ((clib_bihash_kv_48_8_t *) kv)->key[4];
479 reass->key.as_u64[5] = ((clib_bihash_kv_48_8_t *) kv)->key[5];
480 kv->v.reass_index = (reass - rt->pool);
481 kv->v.thread_index = vm->thread_index;
482 reass->last_heard = now;
484 if (clib_bihash_add_del_48_8 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, 1))
486 ip6_reass_free (rm, rt, reass);
493 always_inline ip6_reass_rc_t
494 ip6_reass_finalize (vlib_main_t * vm, vlib_node_runtime_t * node,
495 ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
496 ip6_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
499 *bi0 = reass->first_bi;
500 *error0 = IP6_ERROR_NONE;
501 ip6_frag_hdr_t *frag_hdr;
502 vlib_buffer_t *last_b = NULL;
503 u32 sub_chain_bi = reass->first_bi;
504 u32 total_length = 0;
507 u32 *vec_drop_compress = NULL;
508 ip6_reass_rc_t rv = IP6_REASS_RC_OK;
511 u32 tmp_bi = sub_chain_bi;
512 vlib_buffer_t *tmp = vlib_get_buffer (vm, tmp_bi);
513 vnet_buffer_opaque_t *vnb = vnet_buffer (tmp);
514 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
515 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
517 rv = IP6_REASS_RC_INTERNAL_ERROR;
518 goto free_buffers_and_return;
521 u32 data_len = ip6_reass_buffer_get_data_len (tmp);
522 u32 trim_front = vnet_buffer (tmp)->ip.reass.ip6_frag_hdr_offset +
523 sizeof (*frag_hdr) + ip6_reass_buffer_get_data_offset (tmp);
525 vlib_buffer_length_in_chain (vm, tmp) - trim_front - data_len;
526 if (tmp_bi == reass->first_bi)
528 /* first buffer - keep ip6 header */
529 if (0 != ip6_reass_buffer_get_data_offset (tmp))
531 rv = IP6_REASS_RC_INTERNAL_ERROR;
532 goto free_buffers_and_return;
535 trim_end = vlib_buffer_length_in_chain (vm, tmp) - data_len -
536 (vnet_buffer (tmp)->ip.reass.ip6_frag_hdr_offset +
538 if (!(vlib_buffer_length_in_chain (vm, tmp) - trim_end > 0))
540 rv = IP6_REASS_RC_INTERNAL_ERROR;
541 goto free_buffers_and_return;
545 vlib_buffer_length_in_chain (vm, tmp) - trim_front - trim_end;
551 if (trim_front > tmp->current_length)
553 /* drop whole buffer */
554 vec_add1 (vec_drop_compress, tmp_bi);
555 trim_front -= tmp->current_length;
556 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
558 rv = IP6_REASS_RC_INTERNAL_ERROR;
559 goto free_buffers_and_return;
561 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
562 tmp_bi = tmp->next_buffer;
563 tmp = vlib_get_buffer (vm, tmp_bi);
568 vlib_buffer_advance (tmp, trim_front);
576 last_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
577 last_b->next_buffer = tmp_bi;
580 if (keep_data <= tmp->current_length)
582 tmp->current_length = keep_data;
587 keep_data -= tmp->current_length;
588 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
590 rv = IP6_REASS_RC_INTERNAL_ERROR;
591 goto free_buffers_and_return;
594 total_length += tmp->current_length;
598 vec_add1 (vec_drop_compress, tmp_bi);
599 if (reass->first_bi == tmp_bi)
601 rv = IP6_REASS_RC_INTERNAL_ERROR;
602 goto free_buffers_and_return;
606 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
608 tmp_bi = tmp->next_buffer;
609 tmp = vlib_get_buffer (vm, tmp->next_buffer);
617 vnet_buffer (vlib_get_buffer (vm, sub_chain_bi))->ip.
620 while (~0 != sub_chain_bi);
624 rv = IP6_REASS_RC_INTERNAL_ERROR;
625 goto free_buffers_and_return;
627 last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
628 vlib_buffer_t *first_b = vlib_get_buffer (vm, reass->first_bi);
629 if (total_length < first_b->current_length)
631 rv = IP6_REASS_RC_INTERNAL_ERROR;
632 goto free_buffers_and_return;
634 total_length -= first_b->current_length;
635 first_b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
636 first_b->total_length_not_including_first_buffer = total_length;
637 // drop fragment header
638 vnet_buffer_opaque_t *first_b_vnb = vnet_buffer (first_b);
639 ip6_header_t *ip = vlib_buffer_get_current (first_b);
640 u16 ip6_frag_hdr_offset = first_b_vnb->ip.reass.ip6_frag_hdr_offset;
641 ip6_ext_header_t *prev_hdr;
642 ip6_ext_header_find_t (ip, prev_hdr, frag_hdr,
643 IP_PROTOCOL_IPV6_FRAGMENTATION);
646 prev_hdr->next_hdr = frag_hdr->next_hdr;
650 ip->protocol = frag_hdr->next_hdr;
652 if (!((u8 *) frag_hdr - (u8 *) ip == ip6_frag_hdr_offset))
654 rv = IP6_REASS_RC_INTERNAL_ERROR;
655 goto free_buffers_and_return;
657 memmove (frag_hdr, (u8 *) frag_hdr + sizeof (*frag_hdr),
658 first_b->current_length - ip6_frag_hdr_offset -
659 sizeof (ip6_frag_hdr_t));
660 first_b->current_length -= sizeof (*frag_hdr);
662 clib_host_to_net_u16 (total_length + first_b->current_length -
664 if (!vlib_buffer_chain_linearize (vm, first_b))
666 rv = IP6_REASS_RC_NO_BUF;
667 goto free_buffers_and_return;
669 first_b->flags &= ~VLIB_BUFFER_EXT_HDR_VALID;
670 if (PREDICT_FALSE (first_b->flags & VLIB_BUFFER_IS_TRACED))
672 ip6_reass_add_trace (vm, node, rm, reass, reass->first_bi, FINALIZE, 0);
674 // following code does a hexdump of packet fragments to stdout ...
677 u32 bi = reass->first_bi;
681 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
682 s = format (s, "%u: %U\n", bi, format_hexdump,
683 vlib_buffer_get_current (b), b->current_length);
684 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
693 printf ("%.*s\n", vec_len (s), s);
702 *next0 = IP6_REASSEMBLY_NEXT_INPUT;
706 *next0 = reass->next_index;
708 vnet_buffer (first_b)->ip.reass.estimated_mtu = reass->min_fragment_length;
709 ip6_reass_free (rm, rt, reass);
711 free_buffers_and_return:
712 vlib_buffer_free (vm, vec_drop_compress, vec_len (vec_drop_compress));
713 vec_free (vec_drop_compress);
718 ip6_reass_insert_range_in_chain (vlib_main_t * vm, ip6_reass_main_t * rm,
719 ip6_reass_per_thread_t * rt,
720 ip6_reass_t * reass, u32 prev_range_bi,
724 vlib_buffer_t *new_next_b = vlib_get_buffer (vm, new_next_bi);
725 vnet_buffer_opaque_t *new_next_vnb = vnet_buffer (new_next_b);
726 if (~0 != prev_range_bi)
728 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
729 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
730 new_next_vnb->ip.reass.next_range_bi = prev_vnb->ip.reass.next_range_bi;
731 prev_vnb->ip.reass.next_range_bi = new_next_bi;
735 if (~0 != reass->first_bi)
737 new_next_vnb->ip.reass.next_range_bi = reass->first_bi;
739 reass->first_bi = new_next_bi;
741 reass->data_len += ip6_reass_buffer_get_data_len (new_next_b);
744 always_inline ip6_reass_rc_t
745 ip6_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
746 ip6_reass_main_t * rm, ip6_reass_per_thread_t * rt,
747 ip6_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
748 ip6_frag_hdr_t * frag_hdr, bool is_custom_app)
751 vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0);
752 vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
755 reass->next_index = fvnb->ip.reass.next_index; // store next_index before it's overwritten
756 reass->error_next_index = fvnb->ip.reass.error_next_index; // store error_next_index before it is overwritten
759 fvnb->ip.reass.ip6_frag_hdr_offset =
760 (u8 *) frag_hdr - (u8 *) vlib_buffer_get_current (fb);
761 ip6_header_t *fip = vlib_buffer_get_current (fb);
762 if (fb->current_length < sizeof (*fip) ||
763 fvnb->ip.reass.ip6_frag_hdr_offset == 0 ||
764 fvnb->ip.reass.ip6_frag_hdr_offset >= fb->current_length)
766 return IP6_REASS_RC_INTERNAL_ERROR;
769 u32 fragment_first = fvnb->ip.reass.fragment_first =
770 ip6_frag_hdr_offset_bytes (frag_hdr);
771 u32 fragment_length =
772 vlib_buffer_length_in_chain (vm, fb) -
773 (fvnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
774 u32 fragment_last = fvnb->ip.reass.fragment_last =
775 fragment_first + fragment_length - 1;
776 int more_fragments = ip6_frag_hdr_more (frag_hdr);
777 u32 candidate_range_bi = reass->first_bi;
778 u32 prev_range_bi = ~0;
779 fvnb->ip.reass.range_first = fragment_first;
780 fvnb->ip.reass.range_last = fragment_last;
781 fvnb->ip.reass.next_range_bi = ~0;
784 reass->last_packet_octet = fragment_last;
786 if (~0 == reass->first_bi)
788 // starting a new reassembly
789 ip6_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
791 reass->min_fragment_length = clib_net_to_host_u16 (fip->payload_length);
793 reass->fragments_n = 1;
794 goto check_if_done_maybe;
796 reass->min_fragment_length =
797 clib_min (clib_net_to_host_u16 (fip->payload_length),
798 fvnb->ip.reass.estimated_mtu);
799 while (~0 != candidate_range_bi)
801 vlib_buffer_t *candidate_b = vlib_get_buffer (vm, candidate_range_bi);
802 vnet_buffer_opaque_t *candidate_vnb = vnet_buffer (candidate_b);
803 if (fragment_first > candidate_vnb->ip.reass.range_last)
805 // this fragments starts after candidate range
806 prev_range_bi = candidate_range_bi;
807 candidate_range_bi = candidate_vnb->ip.reass.next_range_bi;
808 if (candidate_vnb->ip.reass.range_last < fragment_last &&
809 ~0 == candidate_range_bi)
811 // special case - this fragment falls beyond all known ranges
812 ip6_reass_insert_range_in_chain (vm, rm, rt, reass,
813 prev_range_bi, *bi0);
819 if (fragment_last < candidate_vnb->ip.reass.range_first)
821 // this fragment ends before candidate range without any overlap
822 ip6_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
826 else if (fragment_first == candidate_vnb->ip.reass.range_first &&
827 fragment_last == candidate_vnb->ip.reass.range_last)
829 // duplicate fragment - ignore
833 // overlapping fragment - not allowed by RFC 8200
834 ip6_reass_drop_all (vm, node, rm, reass);
835 ip6_reass_free (rm, rt, reass);
836 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
838 ip6_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_OVERLAP,
841 *next0 = IP6_REASSEMBLY_NEXT_DROP;
842 *error0 = IP6_ERROR_REASS_OVERLAPPING_FRAGMENT;
843 return IP6_REASS_RC_OK;
847 ++reass->fragments_n;
851 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
853 ip6_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0);
856 if (~0 != reass->last_packet_octet &&
857 reass->data_len == reass->last_packet_octet + 1)
859 return ip6_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0,
867 if (reass->fragments_n > rm->max_reass_len)
869 return IP6_REASS_RC_TOO_MANY_FRAGMENTS;
874 *next0 = IP6_REASSEMBLY_NEXT_DROP;
875 *error0 = IP6_ERROR_REASS_DUPLICATE_FRAGMENT;
878 return IP6_REASS_RC_OK;
882 ip6_reass_verify_upper_layer_present (vlib_node_runtime_t * node,
884 ip6_frag_hdr_t * frag_hdr)
886 ip6_ext_header_t *tmp = (ip6_ext_header_t *) frag_hdr;
887 while (ip6_ext_hdr (tmp->next_hdr))
889 tmp = ip6_ext_next_header (tmp);
891 if (IP_PROTOCOL_IP6_NONXT == tmp->next_hdr)
893 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
894 ICMP6_parameter_problem_first_fragment_has_incomplete_header_chain,
896 b->error = node->errors[IP6_ERROR_REASS_MISSING_UPPER];
904 ip6_reass_verify_fragment_multiple_8 (vlib_main_t * vm,
905 vlib_node_runtime_t * node,
907 ip6_frag_hdr_t * frag_hdr)
909 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
910 ip6_header_t *ip = vlib_buffer_get_current (b);
911 int more_fragments = ip6_frag_hdr_more (frag_hdr);
912 u32 fragment_length =
913 vlib_buffer_length_in_chain (vm, b) -
914 (vnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
915 if (more_fragments && 0 != fragment_length % 8)
917 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
918 ICMP6_parameter_problem_erroneous_header_field,
919 (u8 *) & ip->payload_length - (u8 *) ip);
926 ip6_reass_verify_packet_size_lt_64k (vlib_main_t * vm,
927 vlib_node_runtime_t * node,
929 ip6_frag_hdr_t * frag_hdr)
931 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
932 u32 fragment_first = ip6_frag_hdr_offset_bytes (frag_hdr);
933 u32 fragment_length =
934 vlib_buffer_length_in_chain (vm, b) -
935 (vnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
936 if (fragment_first + fragment_length > 65535)
938 ip6_header_t *ip0 = vlib_buffer_get_current (b);
939 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
940 ICMP6_parameter_problem_erroneous_header_field,
941 (u8 *) & frag_hdr->fragment_offset_and_more
949 ip6_reassembly_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
950 vlib_frame_t * frame, bool is_feature,
953 u32 *from = vlib_frame_vector_args (frame);
954 u32 n_left_from, n_left_to_next, *to_next, next_index;
955 ip6_reass_main_t *rm = &ip6_reass_main;
956 ip6_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
957 clib_spinlock_lock (&rt->lock);
959 n_left_from = frame->n_vectors;
960 next_index = node->cached_next_index;
961 while (n_left_from > 0)
963 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
965 while (n_left_from > 0 && n_left_to_next > 0)
969 u32 next0 = IP6_REASSEMBLY_NEXT_DROP;
970 u32 error0 = IP6_ERROR_NONE;
974 b0 = vlib_get_buffer (vm, bi0);
976 ip6_header_t *ip0 = vlib_buffer_get_current (b0);
977 ip6_frag_hdr_t *frag_hdr = NULL;
978 ip6_ext_header_t *prev_hdr;
979 if (ip6_ext_hdr (ip0->protocol))
981 ip6_ext_header_find_t (ip0, prev_hdr, frag_hdr,
982 IP_PROTOCOL_IPV6_FRAGMENTATION);
986 // this is a regular packet - no fragmentation
987 next0 = IP6_REASSEMBLY_NEXT_INPUT;
990 if (0 == ip6_frag_hdr_offset (frag_hdr))
992 // first fragment - verify upper-layer is present
993 if (!ip6_reass_verify_upper_layer_present (node, b0, frag_hdr))
995 next0 = IP6_REASSEMBLY_NEXT_ICMP_ERROR;
999 if (!ip6_reass_verify_fragment_multiple_8 (vm, node, b0, frag_hdr)
1000 || !ip6_reass_verify_packet_size_lt_64k (vm, node, b0,
1003 next0 = IP6_REASSEMBLY_NEXT_ICMP_ERROR;
1006 vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset =
1007 (u8 *) frag_hdr - (u8 *) ip0;
1012 kv.k.as_u64[0] = ip0->src_address.as_u64[0];
1013 kv.k.as_u64[1] = ip0->src_address.as_u64[1];
1014 kv.k.as_u64[2] = ip0->dst_address.as_u64[0];
1015 kv.k.as_u64[3] = ip0->dst_address.as_u64[1];
1017 ((u64) vec_elt (ip6_main.fib_index_by_sw_if_index,
1018 vnet_buffer (b0)->sw_if_index[VLIB_RX])) << 32 |
1019 (u64) frag_hdr->identification;
1020 kv.k.as_u64[5] = ip0->protocol;
1022 ip6_reass_t *reass =
1023 ip6_reass_find_or_create (vm, node, rm, rt, &kv, &icmp_bi,
1026 if (PREDICT_FALSE (do_handoff))
1028 next0 = IP6_REASSEMBLY_NEXT_HANDOFF;
1030 vnet_buffer (b0)->ip.reass.owner_feature_thread_index =
1033 vnet_buffer (b0)->ip.reass.owner_thread_index =
1038 switch (ip6_reass_update (vm, node, rm, rt, reass, &bi0, &next0,
1039 &error0, frag_hdr, is_custom_app))
1041 case IP6_REASS_RC_OK:
1042 /* nothing to do here */
1044 case IP6_REASS_RC_TOO_MANY_FRAGMENTS:
1045 vlib_node_increment_counter (vm, node->node_index,
1046 IP6_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
1048 ip6_reass_drop_all (vm, node, rm, reass);
1049 ip6_reass_free (rm, rt, reass);
1052 case IP6_REASS_RC_NO_BUF:
1053 vlib_node_increment_counter (vm, node->node_index,
1054 IP6_ERROR_REASS_NO_BUF, 1);
1055 ip6_reass_drop_all (vm, node, rm, reass);
1056 ip6_reass_free (rm, rt, reass);
1059 case IP6_REASS_RC_INTERNAL_ERROR:
1060 /* drop everything and start with a clean slate */
1061 vlib_node_increment_counter (vm, node->node_index,
1062 IP6_ERROR_REASS_INTERNAL_ERROR,
1064 ip6_reass_drop_all (vm, node, rm, reass);
1065 ip6_reass_free (rm, rt, reass);
1074 next0 = IP6_REASSEMBLY_NEXT_DROP;
1078 vnet_buffer_opaque_t *fvnb = vnet_buffer (b0);
1079 next0 = fvnb->ip.reass.error_next_index;
1081 error0 = IP6_ERROR_REASS_LIMIT_REACHED;
1084 b0->error = node->errors[error0];
1091 n_left_to_next -= 1;
1092 if (is_feature && IP6_ERROR_NONE == error0)
1094 b0 = vlib_get_buffer (vm, bi0);
1095 vnet_feature_next (&next0, b0);
1097 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1098 n_left_to_next, bi0, next0);
1103 next0 = IP6_REASSEMBLY_NEXT_ICMP_ERROR;
1104 to_next[0] = icmp_bi;
1106 n_left_to_next -= 1;
1107 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1108 n_left_to_next, icmp_bi,
1116 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1119 clib_spinlock_unlock (&rt->lock);
1120 return frame->n_vectors;
1123 static char *ip6_reassembly_error_strings[] = {
1124 #define _(sym, string) string,
1129 VLIB_NODE_FN (ip6_reass_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1130 vlib_frame_t * frame)
1132 return ip6_reassembly_inline (vm, node, frame, false /* is_feature */ ,
1133 false /* is_custom_app */ );
1137 VLIB_REGISTER_NODE (ip6_reass_node) = {
1138 .name = "ip6-reassembly",
1139 .vector_size = sizeof (u32),
1140 .format_trace = format_ip6_reass_trace,
1141 .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
1142 .error_strings = ip6_reassembly_error_strings,
1143 .n_next_nodes = IP6_REASSEMBLY_N_NEXT,
1146 [IP6_REASSEMBLY_NEXT_INPUT] = "ip6-input",
1147 [IP6_REASSEMBLY_NEXT_DROP] = "ip6-drop",
1148 [IP6_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
1149 [IP6_REASSEMBLY_NEXT_HANDOFF] = "ip6-reassembly-handoff",
1154 VLIB_NODE_FN (ip6_reass_node_feature) (vlib_main_t * vm,
1155 vlib_node_runtime_t * node,
1156 vlib_frame_t * frame)
1158 return ip6_reassembly_inline (vm, node, frame, true /* is_feature */ ,
1159 false /* is_custom_app */ );
1163 VLIB_REGISTER_NODE (ip6_reass_node_feature) = {
1164 .name = "ip6-reassembly-feature",
1165 .vector_size = sizeof (u32),
1166 .format_trace = format_ip6_reass_trace,
1167 .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
1168 .error_strings = ip6_reassembly_error_strings,
1169 .n_next_nodes = IP6_REASSEMBLY_N_NEXT,
1172 [IP6_REASSEMBLY_NEXT_INPUT] = "ip6-input",
1173 [IP6_REASSEMBLY_NEXT_DROP] = "ip6-drop",
1174 [IP6_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
1175 [IP6_REASSEMBLY_NEXT_HANDOFF] = "ip6-reass-feature-hoff",
1181 VNET_FEATURE_INIT (ip6_reassembly_feature, static) = {
1182 .arc_name = "ip6-unicast",
1183 .node_name = "ip6-reassembly-feature",
1184 .runs_before = VNET_FEATURES ("ip6-lookup"),
1189 #ifndef CLIB_MARCH_VARIANT
1191 ip6_reass_get_nbuckets ()
1193 ip6_reass_main_t *rm = &ip6_reass_main;
1197 nbuckets = (u32) (rm->max_reass_n / IP6_REASS_HT_LOAD_FACTOR);
1199 for (i = 0; i < 31; i++)
1200 if ((1 << i) >= nbuckets)
1206 #endif /* CLIB_MARCH_VARIANT */
1210 IP6_EVENT_CONFIG_CHANGED = 1,
1211 } ip6_reass_event_t;
1213 #ifndef CLIB_MARCH_VARIANT
1217 clib_bihash_48_8_t *new_hash;
1218 } ip6_rehash_cb_ctx;
1221 ip6_rehash_cb (clib_bihash_kv_48_8_t * kv, void *_ctx)
1223 ip6_rehash_cb_ctx *ctx = _ctx;
1224 if (clib_bihash_add_del_48_8 (ctx->new_hash, kv, 1))
1231 ip6_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
1232 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1234 ip6_reass_main.timeout_ms = timeout_ms;
1235 ip6_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
1236 ip6_reass_main.max_reass_n = max_reassemblies;
1237 ip6_reass_main.max_reass_len = max_reassembly_length;
1238 ip6_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
1242 ip6_reass_set (u32 timeout_ms, u32 max_reassemblies,
1243 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1245 u32 old_nbuckets = ip6_reass_get_nbuckets ();
1246 ip6_reass_set_params (timeout_ms, max_reassemblies, max_reassembly_length,
1247 expire_walk_interval_ms);
1248 vlib_process_signal_event (ip6_reass_main.vlib_main,
1249 ip6_reass_main.ip6_reass_expire_node_idx,
1250 IP6_EVENT_CONFIG_CHANGED, 0);
1251 u32 new_nbuckets = ip6_reass_get_nbuckets ();
1252 if (ip6_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
1254 clib_bihash_48_8_t new_hash;
1255 clib_memset (&new_hash, 0, sizeof (new_hash));
1256 ip6_rehash_cb_ctx ctx;
1258 ctx.new_hash = &new_hash;
1259 clib_bihash_init_48_8 (&new_hash, "ip6-reass", new_nbuckets,
1260 new_nbuckets * 1024);
1261 clib_bihash_foreach_key_value_pair_48_8 (&ip6_reass_main.hash,
1262 ip6_rehash_cb, &ctx);
1265 clib_bihash_free_48_8 (&new_hash);
1270 clib_bihash_free_48_8 (&ip6_reass_main.hash);
1271 clib_memcpy_fast (&ip6_reass_main.hash, &new_hash,
1272 sizeof (ip6_reass_main.hash));
1279 ip6_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
1280 u32 * expire_walk_interval_ms)
1282 *timeout_ms = ip6_reass_main.timeout_ms;
1283 *max_reassemblies = ip6_reass_main.max_reass_n;
1284 *expire_walk_interval_ms = ip6_reass_main.expire_walk_interval_ms;
1288 static clib_error_t *
1289 ip6_reass_init_function (vlib_main_t * vm)
1291 ip6_reass_main_t *rm = &ip6_reass_main;
1292 clib_error_t *error = 0;
1297 rm->vnet_main = vnet_get_main ();
1299 vec_validate (rm->per_thread_data, vlib_num_workers ());
1300 ip6_reass_per_thread_t *rt;
1301 vec_foreach (rt, rm->per_thread_data)
1303 clib_spinlock_init (&rt->lock);
1304 pool_alloc (rt->pool, rm->max_reass_n);
1307 node = vlib_get_node_by_name (vm, (u8 *) "ip6-reassembly-expire-walk");
1309 rm->ip6_reass_expire_node_idx = node->index;
1311 ip6_reass_set_params (IP6_REASS_TIMEOUT_DEFAULT_MS,
1312 IP6_REASS_MAX_REASSEMBLIES_DEFAULT,
1313 IP6_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
1314 IP6_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
1316 nbuckets = ip6_reass_get_nbuckets ();
1317 clib_bihash_init_48_8 (&rm->hash, "ip6-reass", nbuckets, nbuckets * 1024);
1319 node = vlib_get_node_by_name (vm, (u8 *) "ip6-drop");
1321 rm->ip6_drop_idx = node->index;
1322 node = vlib_get_node_by_name (vm, (u8 *) "ip6-icmp-error");
1324 rm->ip6_icmp_error_idx = node->index;
1326 if ((error = vlib_call_init_function (vm, ip_main_init)))
1328 ip6_register_protocol (IP_PROTOCOL_IPV6_FRAGMENTATION,
1329 ip6_reass_node.index);
1331 rm->fq_index = vlib_frame_queue_main_init (ip6_reass_node.index, 0);
1332 rm->fq_feature_index =
1333 vlib_frame_queue_main_init (ip6_reass_node_feature.index, 0);
1338 VLIB_INIT_FUNCTION (ip6_reass_init_function);
1339 #endif /* CLIB_MARCH_VARIANT */
1342 ip6_reass_walk_expired (vlib_main_t * vm,
1343 vlib_node_runtime_t * node, vlib_frame_t * f)
1345 ip6_reass_main_t *rm = &ip6_reass_main;
1346 uword event_type, *event_data = 0;
1350 vlib_process_wait_for_event_or_clock (vm,
1351 (f64) rm->expire_walk_interval_ms
1352 / (f64) MSEC_PER_SEC);
1353 event_type = vlib_process_get_events (vm, &event_data);
1357 case ~0: /* no events => timeout */
1358 /* nothing to do here */
1360 case IP6_EVENT_CONFIG_CHANGED:
1363 clib_warning ("BUG: event type 0x%wx", event_type);
1366 f64 now = vlib_time_now (vm);
1369 int *pool_indexes_to_free = NULL;
1371 uword thread_index = 0;
1373 const uword nthreads = vlib_num_workers () + 1;
1374 u32 *vec_icmp_bi = NULL;
1375 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1377 ip6_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1378 clib_spinlock_lock (&rt->lock);
1380 vec_reset_length (pool_indexes_to_free);
1382 pool_foreach_index (index, rt->pool, ({
1383 reass = pool_elt_at_index (rt->pool, index);
1384 if (now > reass->last_heard + rm->timeout)
1386 vec_add1 (pool_indexes_to_free, index);
1392 vec_foreach (i, pool_indexes_to_free)
1394 ip6_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
1396 ip6_reass_on_timeout (vm, node, rm, reass, &icmp_bi);
1398 vec_add1 (vec_icmp_bi, icmp_bi);
1400 ip6_reass_free (rm, rt, reass);
1404 clib_spinlock_unlock (&rt->lock);
1407 while (vec_len (vec_icmp_bi) > 0)
1410 vlib_get_frame_to_node (vm, rm->ip6_icmp_error_idx);
1411 u32 *to_next = vlib_frame_vector_args (f);
1412 u32 n_left_to_next = VLIB_FRAME_SIZE - f->n_vectors;
1413 int trace_frame = 0;
1414 while (vec_len (vec_icmp_bi) > 0 && n_left_to_next > 0)
1416 u32 bi = vec_pop (vec_icmp_bi);
1417 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
1418 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
1420 b->error = node->errors[IP6_ERROR_REASS_TIMEOUT];
1424 n_left_to_next -= 1;
1426 f->frame_flags |= (trace_frame * VLIB_FRAME_TRACE);
1427 vlib_put_frame_to_node (vm, rm->ip6_icmp_error_idx, f);
1430 vec_free (pool_indexes_to_free);
1431 vec_free (vec_icmp_bi);
1434 _vec_len (event_data) = 0;
1442 VLIB_REGISTER_NODE (ip6_reass_expire_node, static) = {
1443 .function = ip6_reass_walk_expired,
1444 .format_trace = format_ip6_reass_trace,
1445 .type = VLIB_NODE_TYPE_PROCESS,
1446 .name = "ip6-reassembly-expire-walk",
1448 .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
1449 .error_strings = ip6_reassembly_error_strings,
1455 format_ip6_reass_key (u8 * s, va_list * args)
1457 ip6_reass_key_t *key = va_arg (*args, ip6_reass_key_t *);
1458 s = format (s, "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
1459 key->xx_id, format_ip6_address, &key->src, format_ip6_address,
1460 &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
1465 format_ip6_reass (u8 * s, va_list * args)
1467 vlib_main_t *vm = va_arg (*args, vlib_main_t *);
1468 ip6_reass_t *reass = va_arg (*args, ip6_reass_t *);
1470 s = format (s, "ID: %lu, key: %U\n first_bi: %u, data_len: %u, "
1471 "last_packet_octet: %u, trace_op_counter: %u\n",
1472 reass->id, format_ip6_reass_key, &reass->key, reass->first_bi,
1473 reass->data_len, reass->last_packet_octet,
1474 reass->trace_op_counter);
1475 u32 bi = reass->first_bi;
1479 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
1480 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
1481 s = format (s, " #%03u: range: [%u, %u], bi: %u, off: %d, len: %u, "
1482 "fragment[%u, %u]\n",
1483 counter, vnb->ip.reass.range_first,
1484 vnb->ip.reass.range_last, bi,
1485 ip6_reass_buffer_get_data_offset (b),
1486 ip6_reass_buffer_get_data_len (b),
1487 vnb->ip.reass.fragment_first, vnb->ip.reass.fragment_last);
1488 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
1490 bi = b->next_buffer;
1500 static clib_error_t *
1501 show_ip6_reass (vlib_main_t * vm, unformat_input_t * input,
1502 CLIB_UNUSED (vlib_cli_command_t * lmd))
1504 ip6_reass_main_t *rm = &ip6_reass_main;
1506 vlib_cli_output (vm, "---------------------");
1507 vlib_cli_output (vm, "IP6 reassembly status");
1508 vlib_cli_output (vm, "---------------------");
1509 bool details = false;
1510 if (unformat (input, "details"))
1515 u32 sum_reass_n = 0;
1516 u64 sum_buffers_n = 0;
1519 const uword nthreads = vlib_num_workers () + 1;
1520 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1522 ip6_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1523 clib_spinlock_lock (&rt->lock);
1527 pool_foreach (reass, rt->pool, {
1528 vlib_cli_output (vm, "%U", format_ip6_reass, vm, reass);
1532 sum_reass_n += rt->reass_n;
1533 clib_spinlock_unlock (&rt->lock);
1535 vlib_cli_output (vm, "---------------------");
1536 vlib_cli_output (vm, "Current IP6 reassemblies count: %lu\n",
1537 (long unsigned) sum_reass_n);
1538 vlib_cli_output (vm, "Maximum configured concurrent IP6 reassemblies per "
1539 "worker-thread: %lu\n", (long unsigned) rm->max_reass_n);
1540 vlib_cli_output (vm, "Buffers in use: %lu\n",
1541 (long unsigned) sum_buffers_n);
1546 VLIB_CLI_COMMAND (show_ip6_reassembly_cmd, static) = {
1547 .path = "show ip6-reassembly",
1548 .short_help = "show ip6-reassembly [details]",
1549 .function = show_ip6_reass,
1553 #ifndef CLIB_MARCH_VARIANT
1555 ip6_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
1557 return vnet_feature_enable_disable ("ip6-unicast", "ip6-reassembly-feature",
1558 sw_if_index, enable_disable, 0, 0);
1560 #endif /* CLIB_MARCH_VARIANT */
1562 #define foreach_ip6_reassembly_handoff_error \
1563 _(CONGESTION_DROP, "congestion drop")
1568 #define _(sym,str) IP6_REASSEMBLY_HANDOFF_ERROR_##sym,
1569 foreach_ip6_reassembly_handoff_error
1571 IP6_REASSEMBLY_HANDOFF_N_ERROR,
1572 } ip6_reassembly_handoff_error_t;
1574 static char *ip6_reassembly_handoff_error_strings[] = {
1575 #define _(sym,string) string,
1576 foreach_ip6_reassembly_handoff_error
1582 u32 next_worker_index;
1583 } ip6_reassembly_handoff_trace_t;
1586 format_ip6_reassembly_handoff_trace (u8 * s, va_list * args)
1588 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1589 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1590 ip6_reassembly_handoff_trace_t *t =
1591 va_arg (*args, ip6_reassembly_handoff_trace_t *);
1594 format (s, "ip6-reassembly-handoff: next-worker %d",
1595 t->next_worker_index);
1601 ip6_reassembly_handoff_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1602 vlib_frame_t * frame, bool is_feature)
1604 ip6_reass_main_t *rm = &ip6_reass_main;
1606 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1607 u32 n_enq, n_left_from, *from;
1608 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
1611 from = vlib_frame_vector_args (frame);
1612 n_left_from = frame->n_vectors;
1613 vlib_get_buffers (vm, from, bufs, n_left_from);
1616 ti = thread_indices;
1618 fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
1620 while (n_left_from > 0)
1623 (is_feature) ? vnet_buffer (b[0])->ip.
1624 reass.owner_feature_thread_index : vnet_buffer (b[0])->ip.
1625 reass.owner_thread_index;
1628 ((node->flags & VLIB_NODE_FLAG_TRACE)
1629 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1631 ip6_reassembly_handoff_trace_t *t =
1632 vlib_add_trace (vm, node, b[0], sizeof (*t));
1633 t->next_worker_index = ti[0];
1641 vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
1642 frame->n_vectors, 1);
1644 if (n_enq < frame->n_vectors)
1645 vlib_node_increment_counter (vm, node->node_index,
1646 IP6_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
1647 frame->n_vectors - n_enq);
1648 return frame->n_vectors;
1651 VLIB_NODE_FN (ip6_reassembly_handoff_node) (vlib_main_t * vm,
1652 vlib_node_runtime_t * node,
1653 vlib_frame_t * frame)
1655 return ip6_reassembly_handoff_inline (vm, node, frame,
1656 false /* is_feature */ );
1660 VLIB_REGISTER_NODE (ip6_reassembly_handoff_node) = {
1661 .name = "ip6-reassembly-handoff",
1662 .vector_size = sizeof (u32),
1663 .n_errors = ARRAY_LEN(ip6_reassembly_handoff_error_strings),
1664 .error_strings = ip6_reassembly_handoff_error_strings,
1665 .format_trace = format_ip6_reassembly_handoff_trace,
1675 VLIB_NODE_FN (ip6_reassembly_feature_handoff_node) (vlib_main_t * vm,
1676 vlib_node_runtime_t * node, vlib_frame_t * frame)
1678 return ip6_reassembly_handoff_inline (vm, node, frame, true /* is_feature */ );
1683 VLIB_REGISTER_NODE (ip6_reassembly_feature_handoff_node) = {
1684 .name = "ip6-reass-feature-hoff",
1685 .vector_size = sizeof (u32),
1686 .n_errors = ARRAY_LEN(ip6_reassembly_handoff_error_strings),
1687 .error_strings = ip6_reassembly_handoff_error_strings,
1688 .format_trace = format_ip6_reassembly_handoff_trace,
1699 * fd.io coding-style-patch-verification: ON
1702 * eval: (c-set-style "gnu")