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 Full Reassembly.
20 * This file contains the source code for IPv4 full reassembly.
23 #include <vppinfra/vec.h>
24 #include <vnet/vnet.h>
25 #include <vnet/ip/ip.h>
26 #include <vppinfra/fifo.h>
27 #include <vppinfra/bihash_16_8.h>
28 #include <vnet/ip/reass/ip4_full_reass.h>
31 #define MSEC_PER_SEC 1000
32 #define IP4_REASS_TIMEOUT_DEFAULT_MS 100
33 #define IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
34 #define IP4_REASS_MAX_REASSEMBLIES_DEFAULT 1024
35 #define IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
36 #define IP4_REASS_HT_LOAD_FACTOR (0.75)
38 #define IP4_REASS_DEBUG_BUFFERS 0
39 #if IP4_REASS_DEBUG_BUFFERS
40 #define IP4_REASS_DEBUG_BUFFER(bi, what) \
44 printf (#what "buffer %u", _bi); \
45 vlib_buffer_t *_b = vlib_get_buffer (vm, _bi); \
46 while (_b->flags & VLIB_BUFFER_NEXT_PRESENT) \
48 _bi = _b->next_buffer; \
49 printf ("[%u]", _bi); \
50 _b = vlib_get_buffer (vm, _bi); \
57 #define IP4_REASS_DEBUG_BUFFER(...)
63 IP4_REASS_RC_TOO_MANY_FRAGMENTS,
64 IP4_REASS_RC_INTERNAL_ERROR,
67 } ip4_full_reass_rc_t;
84 } ip4_full_reass_key_t;
91 u32 memory_owner_thread_index;
94 } ip4_full_reass_val_t;
100 ip4_full_reass_key_t k;
101 ip4_full_reass_val_t v;
103 clib_bihash_kv_16_8_t kv;
104 } ip4_full_reass_kv_t;
107 ip4_full_reass_buffer_get_data_offset (vlib_buffer_t * b)
109 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
110 return vnb->ip.reass.range_first - vnb->ip.reass.fragment_first;
114 ip4_full_reass_buffer_get_data_len (vlib_buffer_t * b)
116 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
117 return clib_min (vnb->ip.reass.range_last, vnb->ip.reass.fragment_last) -
118 (vnb->ip.reass.fragment_first +
119 ip4_full_reass_buffer_get_data_offset (b)) + 1;
125 ip4_full_reass_key_t key;
126 // time when last packet was received
128 // internal id of this reassembly
130 // buffer index of first buffer in this reassembly context
132 // last octet of packet, ~0 until fragment without more_fragments arrives
133 u32 last_packet_octet;
134 // length of data collected so far
136 // trace operation counter
137 u32 trace_op_counter;
138 // next index - used by non-feature node
140 // error next index - used by custom apps (~0 if not used)
141 u32 error_next_index;
142 // minimum fragment length for this reassembly - used to estimate MTU
143 u16 min_fragment_length;
144 // number of fragments in this reassembly
146 // thread owning memory for this context (whose pool contains this ctx)
147 u32 memory_owner_thread_index;
148 // thread which received fragment with offset 0 and which sends out the
149 // completed reassembly
150 u32 sendout_thread_index;
155 ip4_full_reass_t *pool;
158 clib_spinlock_t lock;
159 } ip4_full_reass_per_thread_t;
166 u32 expire_walk_interval_ms;
167 // maximum number of fragments in one reassembly
169 // maximum number of reassemblies
173 clib_bihash_16_8_t hash;
175 ip4_full_reass_per_thread_t *per_thread_data;
178 vlib_main_t *vlib_main;
180 // node index of ip4-drop node
182 u32 ip4_full_reass_expire_node_idx;
184 /** Worker handoff */
186 u32 fq_feature_index;
188 // reference count for enabling/disabling feature - per interface
189 u32 *feature_use_refcount_per_intf;
190 } ip4_full_reass_main_t;
192 extern ip4_full_reass_main_t ip4_full_reass_main;
194 #ifndef CLIB_MARCH_VARIANT
195 ip4_full_reass_main_t ip4_full_reass_main;
196 #endif /* CLIB_MARCH_VARIANT */
200 IP4_FULL_REASS_NEXT_INPUT,
201 IP4_FULL_REASS_NEXT_DROP,
202 IP4_FULL_REASS_NEXT_HANDOFF,
203 IP4_FULL_REASS_N_NEXT,
204 } ip4_full_reass_next_t;
214 } ip4_full_reass_trace_operation_e;
224 } ip4_full_reass_range_trace_t;
228 ip4_full_reass_trace_operation_e action;
230 ip4_full_reass_range_trace_t trace_range;
238 } ip4_full_reass_trace_t;
240 extern vlib_node_registration_t ip4_full_reass_node;
241 extern vlib_node_registration_t ip4_full_reass_node_feature;
244 ip4_full_reass_trace_details (vlib_main_t * vm, u32 bi,
245 ip4_full_reass_range_trace_t * trace)
247 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
248 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
249 trace->range_first = vnb->ip.reass.range_first;
250 trace->range_last = vnb->ip.reass.range_last;
251 trace->data_offset = ip4_full_reass_buffer_get_data_offset (b);
252 trace->data_len = ip4_full_reass_buffer_get_data_len (b);
253 trace->range_bi = bi;
257 format_ip4_full_reass_range_trace (u8 * s, va_list * args)
259 ip4_full_reass_range_trace_t *trace =
260 va_arg (*args, ip4_full_reass_range_trace_t *);
262 format (s, "range: [%u, %u], off %d, len %u, bi %u", trace->range_first,
263 trace->range_last, trace->data_offset, trace->data_len,
269 format_ip4_full_reass_trace (u8 * s, va_list * args)
271 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
272 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
273 ip4_full_reass_trace_t *t = va_arg (*args, ip4_full_reass_trace_t *);
275 if (~0 != t->reass_id)
277 s = format (s, "reass id: %u, op id: %u, ", t->reass_id, t->op_id);
278 indent = format_get_indent (s);
281 "first bi: %u, data len: %u, ip/fragment[%u, %u]",
282 t->trace_range.first_bi, t->total_data_len, t->fragment_first,
288 s = format (s, "\n%Ushrink %U by %u", format_white_space, indent,
289 format_ip4_full_reass_range_trace, &t->trace_range,
293 s = format (s, "\n%Udiscard %U", format_white_space, indent,
294 format_ip4_full_reass_range_trace, &t->trace_range);
297 s = format (s, "\n%Unew %U", format_white_space, indent,
298 format_ip4_full_reass_range_trace, &t->trace_range);
301 s = format (s, "\n%Uoverlapping/ignored %U", format_white_space, indent,
302 format_ip4_full_reass_range_trace, &t->trace_range);
305 s = format (s, "\n%Ufinalize reassembly", format_white_space, indent);
309 format (s, "handoff from thread #%u to thread #%u", t->thread_id,
317 ip4_full_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
318 ip4_full_reass_main_t * rm,
319 ip4_full_reass_t * reass, u32 bi,
320 ip4_full_reass_trace_operation_e action,
321 u32 size_diff, u32 thread_id_to)
323 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
324 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
325 ip4_full_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
328 t->reass_id = reass->id;
329 t->op_id = reass->trace_op_counter;
330 t->trace_range.first_bi = reass->first_bi;
331 t->total_data_len = reass->data_len;
332 ++reass->trace_op_counter;
338 t->trace_range.first_bi = 0;
339 t->total_data_len = 0;
342 ip4_full_reass_trace_details (vm, bi, &t->trace_range);
343 t->size_diff = size_diff;
344 t->thread_id = vm->thread_index;
345 t->thread_id_to = thread_id_to;
346 t->fragment_first = vnb->ip.reass.fragment_first;
347 t->fragment_last = vnb->ip.reass.fragment_last;
350 s = format (s, "%U", format_ip4_full_reass_trace, NULL, NULL, t);
351 printf ("%.*s\n", vec_len (s), s);
353 vec_reset_length (s);
358 ip4_full_reass_free_ctx (ip4_full_reass_per_thread_t * rt,
359 ip4_full_reass_t * reass)
361 pool_put (rt->pool, reass);
366 ip4_full_reass_free (ip4_full_reass_main_t * rm,
367 ip4_full_reass_per_thread_t * rt,
368 ip4_full_reass_t * reass)
370 clib_bihash_kv_16_8_t kv;
371 kv.key[0] = reass->key.as_u64[0];
372 kv.key[1] = reass->key.as_u64[1];
373 clib_bihash_add_del_16_8 (&rm->hash, &kv, 0);
374 return ip4_full_reass_free_ctx (rt, reass);
378 ip4_full_reass_drop_all (vlib_main_t * vm, vlib_node_runtime_t * node,
379 ip4_full_reass_main_t * rm, ip4_full_reass_t * reass)
381 u32 range_bi = reass->first_bi;
382 vlib_buffer_t *range_b;
383 vnet_buffer_opaque_t *range_vnb;
385 while (~0 != range_bi)
387 range_b = vlib_get_buffer (vm, range_bi);
388 range_vnb = vnet_buffer (range_b);
392 vec_add1 (to_free, bi);
393 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
394 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
397 b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
404 range_bi = range_vnb->ip.reass.next_range_bi;
406 /* send to next_error_index */
407 if (~0 != reass->error_next_index)
409 u32 n_left_to_next, *to_next, next_index;
411 next_index = reass->error_next_index;
414 while (vec_len (to_free) > 0)
416 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
418 while (vec_len (to_free) > 0 && n_left_to_next > 0)
420 bi = vec_pop (to_free);
429 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
434 vlib_buffer_free (vm, to_free, vec_len (to_free));
439 ip4_full_reass_init (ip4_full_reass_t * reass)
441 reass->first_bi = ~0;
442 reass->last_packet_octet = ~0;
444 reass->next_index = ~0;
445 reass->error_next_index = ~0;
448 always_inline ip4_full_reass_t *
449 ip4_full_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
450 ip4_full_reass_main_t * rm,
451 ip4_full_reass_per_thread_t * rt,
452 ip4_full_reass_kv_t * kv, u8 * do_handoff)
454 ip4_full_reass_t *reass;
460 now = vlib_time_now (vm);
461 if (!clib_bihash_search_16_8
462 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, (clib_bihash_kv_16_8_t *) kv))
465 pool_elt_at_index (rm->per_thread_data
466 [kv->v.memory_owner_thread_index].pool,
468 if (vm->thread_index != reass->memory_owner_thread_index)
474 if (now > reass->last_heard + rm->timeout)
476 ip4_full_reass_drop_all (vm, node, rm, reass);
477 ip4_full_reass_free (rm, rt, reass);
484 reass->last_heard = now;
488 if (rt->reass_n >= rm->max_reass_n)
495 pool_get (rt->pool, reass);
496 clib_memset (reass, 0, sizeof (*reass));
497 reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
498 reass->memory_owner_thread_index = vm->thread_index;
500 ip4_full_reass_init (reass);
504 reass->key.as_u64[0] = ((clib_bihash_kv_16_8_t *) kv)->key[0];
505 reass->key.as_u64[1] = ((clib_bihash_kv_16_8_t *) kv)->key[1];
506 kv->v.reass_index = (reass - rt->pool);
507 kv->v.memory_owner_thread_index = vm->thread_index;
508 reass->last_heard = now;
511 clib_bihash_add_del_16_8 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, 2);
514 ip4_full_reass_free_ctx (rt, reass);
516 // if other worker created a context already work with the other copy
524 always_inline ip4_full_reass_rc_t
525 ip4_full_reass_finalize (vlib_main_t * vm, vlib_node_runtime_t * node,
526 ip4_full_reass_main_t * rm,
527 ip4_full_reass_per_thread_t * rt,
528 ip4_full_reass_t * reass, u32 * bi0,
529 u32 * next0, u32 * error0, bool is_custom_app)
531 vlib_buffer_t *first_b = vlib_get_buffer (vm, reass->first_bi);
532 vlib_buffer_t *last_b = NULL;
533 u32 sub_chain_bi = reass->first_bi;
534 u32 total_length = 0;
538 u32 tmp_bi = sub_chain_bi;
539 vlib_buffer_t *tmp = vlib_get_buffer (vm, tmp_bi);
540 ip4_header_t *ip = vlib_buffer_get_current (tmp);
541 vnet_buffer_opaque_t *vnb = vnet_buffer (tmp);
542 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
543 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
545 return IP4_REASS_RC_INTERNAL_ERROR;
548 u32 data_len = ip4_full_reass_buffer_get_data_len (tmp);
550 ip4_header_bytes (ip) + ip4_full_reass_buffer_get_data_offset (tmp);
552 vlib_buffer_length_in_chain (vm, tmp) - trim_front - data_len;
553 if (tmp_bi == reass->first_bi)
555 /* first buffer - keep ip4 header */
556 if (0 != ip4_full_reass_buffer_get_data_offset (tmp))
558 return IP4_REASS_RC_INTERNAL_ERROR;
561 trim_end = vlib_buffer_length_in_chain (vm, tmp) - data_len -
562 ip4_header_bytes (ip);
563 if (!(vlib_buffer_length_in_chain (vm, tmp) - trim_end > 0))
565 return IP4_REASS_RC_INTERNAL_ERROR;
569 vlib_buffer_length_in_chain (vm, tmp) - trim_front - trim_end;
575 if (trim_front > tmp->current_length)
577 /* drop whole buffer */
578 u32 to_be_freed_bi = tmp_bi;
579 trim_front -= tmp->current_length;
580 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
582 return IP4_REASS_RC_INTERNAL_ERROR;
584 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
585 tmp_bi = tmp->next_buffer;
586 tmp->next_buffer = 0;
587 tmp = vlib_get_buffer (vm, tmp_bi);
588 vlib_buffer_free_one (vm, to_be_freed_bi);
593 vlib_buffer_advance (tmp, trim_front);
601 last_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
602 last_b->next_buffer = tmp_bi;
605 if (keep_data <= tmp->current_length)
607 tmp->current_length = keep_data;
612 keep_data -= tmp->current_length;
613 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
615 return IP4_REASS_RC_INTERNAL_ERROR;
618 total_length += tmp->current_length;
619 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
621 tmp_bi = tmp->next_buffer;
622 tmp = vlib_get_buffer (vm, tmp->next_buffer);
631 u32 to_be_freed_bi = tmp_bi;
632 if (reass->first_bi == tmp_bi)
634 return IP4_REASS_RC_INTERNAL_ERROR;
636 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
638 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
639 tmp_bi = tmp->next_buffer;
640 tmp->next_buffer = 0;
641 tmp = vlib_get_buffer (vm, tmp_bi);
642 vlib_buffer_free_one (vm, to_be_freed_bi);
646 tmp->next_buffer = 0;
647 vlib_buffer_free_one (vm, to_be_freed_bi);
653 vnet_buffer (vlib_get_buffer (vm, sub_chain_bi))->ip.
656 while (~0 != sub_chain_bi);
660 return IP4_REASS_RC_INTERNAL_ERROR;
662 last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
664 if (total_length < first_b->current_length)
666 return IP4_REASS_RC_INTERNAL_ERROR;
668 total_length -= first_b->current_length;
669 first_b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
670 first_b->total_length_not_including_first_buffer = total_length;
671 ip4_header_t *ip = vlib_buffer_get_current (first_b);
672 ip->flags_and_fragment_offset = 0;
673 ip->length = clib_host_to_net_u16 (first_b->current_length + total_length);
674 ip->checksum = ip4_header_checksum (ip);
675 if (!vlib_buffer_chain_linearize (vm, first_b))
677 return IP4_REASS_RC_NO_BUF;
679 // reset to reconstruct the mbuf linking
680 first_b->flags &= ~VLIB_BUFFER_EXT_HDR_VALID;
681 if (PREDICT_FALSE (first_b->flags & VLIB_BUFFER_IS_TRACED))
683 ip4_full_reass_add_trace (vm, node, rm, reass, reass->first_bi,
686 // following code does a hexdump of packet fragments to stdout ...
689 u32 bi = reass->first_bi;
693 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
694 s = format (s, "%u: %U\n", bi, format_hexdump,
695 vlib_buffer_get_current (b), b->current_length);
696 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
705 printf ("%.*s\n", vec_len (s), s);
712 *bi0 = reass->first_bi;
715 *next0 = IP4_FULL_REASS_NEXT_INPUT;
719 *next0 = reass->next_index;
721 vnet_buffer (first_b)->ip.reass.estimated_mtu = reass->min_fragment_length;
722 *error0 = IP4_ERROR_NONE;
723 ip4_full_reass_free (rm, rt, reass);
725 return IP4_REASS_RC_OK;
728 always_inline ip4_full_reass_rc_t
729 ip4_full_reass_insert_range_in_chain (vlib_main_t * vm,
730 ip4_full_reass_main_t * rm,
731 ip4_full_reass_per_thread_t * rt,
732 ip4_full_reass_t * reass,
733 u32 prev_range_bi, u32 new_next_bi)
735 vlib_buffer_t *new_next_b = vlib_get_buffer (vm, new_next_bi);
736 vnet_buffer_opaque_t *new_next_vnb = vnet_buffer (new_next_b);
737 if (~0 != prev_range_bi)
739 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
740 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
741 new_next_vnb->ip.reass.next_range_bi = prev_vnb->ip.reass.next_range_bi;
742 prev_vnb->ip.reass.next_range_bi = new_next_bi;
746 if (~0 != reass->first_bi)
748 new_next_vnb->ip.reass.next_range_bi = reass->first_bi;
750 reass->first_bi = new_next_bi;
752 vnet_buffer_opaque_t *vnb = vnet_buffer (new_next_b);
753 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
754 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
756 return IP4_REASS_RC_INTERNAL_ERROR;
758 reass->data_len += ip4_full_reass_buffer_get_data_len (new_next_b);
759 return IP4_REASS_RC_OK;
762 always_inline ip4_full_reass_rc_t
763 ip4_full_reass_remove_range_from_chain (vlib_main_t * vm,
764 vlib_node_runtime_t * node,
765 ip4_full_reass_main_t * rm,
766 ip4_full_reass_t * reass,
767 u32 prev_range_bi, u32 discard_bi)
769 vlib_buffer_t *discard_b = vlib_get_buffer (vm, discard_bi);
770 vnet_buffer_opaque_t *discard_vnb = vnet_buffer (discard_b);
771 if (~0 != prev_range_bi)
773 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
774 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
775 if (!(prev_vnb->ip.reass.next_range_bi == discard_bi))
777 return IP4_REASS_RC_INTERNAL_ERROR;
779 prev_vnb->ip.reass.next_range_bi = discard_vnb->ip.reass.next_range_bi;
783 reass->first_bi = discard_vnb->ip.reass.next_range_bi;
785 vnet_buffer_opaque_t *vnb = vnet_buffer (discard_b);
786 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
787 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
789 return IP4_REASS_RC_INTERNAL_ERROR;
791 reass->data_len -= ip4_full_reass_buffer_get_data_len (discard_b);
794 u32 to_be_freed_bi = discard_bi;
795 if (PREDICT_FALSE (discard_b->flags & VLIB_BUFFER_IS_TRACED))
797 ip4_full_reass_add_trace (vm, node, rm, reass, discard_bi,
798 RANGE_DISCARD, 0, ~0);
800 if (discard_b->flags & VLIB_BUFFER_NEXT_PRESENT)
802 discard_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
803 discard_bi = discard_b->next_buffer;
804 discard_b->next_buffer = 0;
805 discard_b = vlib_get_buffer (vm, discard_bi);
806 vlib_buffer_free_one (vm, to_be_freed_bi);
810 discard_b->next_buffer = 0;
811 vlib_buffer_free_one (vm, to_be_freed_bi);
815 return IP4_REASS_RC_OK;
818 always_inline ip4_full_reass_rc_t
819 ip4_full_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
820 ip4_full_reass_main_t * rm,
821 ip4_full_reass_per_thread_t * rt,
822 ip4_full_reass_t * reass, u32 * bi0, u32 * next0,
823 u32 * error0, bool is_custom_app,
824 u32 * handoff_thread_idx)
826 vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0);
827 vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
830 // store (error_)next_index before it's overwritten
831 reass->next_index = fvnb->ip.reass.next_index;
832 reass->error_next_index = fvnb->ip.reass.error_next_index;
834 ip4_full_reass_rc_t rc = IP4_REASS_RC_OK;
836 ip4_header_t *fip = vlib_buffer_get_current (fb);
837 const u32 fragment_first = ip4_get_fragment_offset_bytes (fip);
838 const u32 fragment_length =
839 clib_net_to_host_u16 (fip->length) - ip4_header_bytes (fip);
840 const u32 fragment_last = fragment_first + fragment_length - 1;
841 fvnb->ip.reass.fragment_first = fragment_first;
842 fvnb->ip.reass.fragment_last = fragment_last;
843 int more_fragments = ip4_get_fragment_more (fip);
844 u32 candidate_range_bi = reass->first_bi;
845 u32 prev_range_bi = ~0;
846 fvnb->ip.reass.range_first = fragment_first;
847 fvnb->ip.reass.range_last = fragment_last;
848 fvnb->ip.reass.next_range_bi = ~0;
851 reass->last_packet_octet = fragment_last;
853 if (~0 == reass->first_bi)
855 // starting a new reassembly
857 ip4_full_reass_insert_range_in_chain (vm, rm, rt, reass,
858 prev_range_bi, *bi0);
859 if (IP4_REASS_RC_OK != rc)
863 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
865 ip4_full_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0,
869 reass->min_fragment_length = clib_net_to_host_u16 (fip->length);
870 reass->fragments_n = 1;
871 return IP4_REASS_RC_OK;
873 reass->min_fragment_length =
874 clib_min (clib_net_to_host_u16 (fip->length),
875 fvnb->ip.reass.estimated_mtu);
876 while (~0 != candidate_range_bi)
878 vlib_buffer_t *candidate_b = vlib_get_buffer (vm, candidate_range_bi);
879 vnet_buffer_opaque_t *candidate_vnb = vnet_buffer (candidate_b);
880 if (fragment_first > candidate_vnb->ip.reass.range_last)
882 // this fragments starts after candidate range
883 prev_range_bi = candidate_range_bi;
884 candidate_range_bi = candidate_vnb->ip.reass.next_range_bi;
885 if (candidate_vnb->ip.reass.range_last < fragment_last &&
886 ~0 == candidate_range_bi)
888 // special case - this fragment falls beyond all known ranges
890 ip4_full_reass_insert_range_in_chain (vm, rm, rt, reass,
891 prev_range_bi, *bi0);
892 if (IP4_REASS_RC_OK != rc)
901 if (fragment_last < candidate_vnb->ip.reass.range_first)
903 // this fragment ends before candidate range without any overlap
905 ip4_full_reass_insert_range_in_chain (vm, rm, rt, reass,
906 prev_range_bi, *bi0);
907 if (IP4_REASS_RC_OK != rc)
915 if (fragment_first >= candidate_vnb->ip.reass.range_first &&
916 fragment_last <= candidate_vnb->ip.reass.range_last)
918 // this fragment is a (sub)part of existing range, ignore it
919 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
921 ip4_full_reass_add_trace (vm, node, rm, reass, *bi0,
922 RANGE_OVERLAP, 0, ~0);
926 int discard_candidate = 0;
927 if (fragment_first < candidate_vnb->ip.reass.range_first)
930 fragment_last - candidate_vnb->ip.reass.range_first + 1;
931 if (overlap < ip4_full_reass_buffer_get_data_len (candidate_b))
933 candidate_vnb->ip.reass.range_first += overlap;
934 if (reass->data_len < overlap)
936 return IP4_REASS_RC_INTERNAL_ERROR;
938 reass->data_len -= overlap;
939 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
941 ip4_full_reass_add_trace (vm, node, rm, reass,
943 RANGE_SHRINK, 0, ~0);
946 ip4_full_reass_insert_range_in_chain (vm, rm, rt, reass,
949 if (IP4_REASS_RC_OK != rc)
957 discard_candidate = 1;
960 else if (fragment_last > candidate_vnb->ip.reass.range_last)
963 candidate_vnb->ip.reass.range_last - fragment_first + 1;
964 if (overlap < ip4_full_reass_buffer_get_data_len (candidate_b))
966 fvnb->ip.reass.range_first += overlap;
967 if (~0 != candidate_vnb->ip.reass.next_range_bi)
969 prev_range_bi = candidate_range_bi;
971 candidate_vnb->ip.reass.next_range_bi;
976 // special case - last range discarded
978 ip4_full_reass_insert_range_in_chain (vm, rm, rt,
982 if (IP4_REASS_RC_OK != rc)
991 discard_candidate = 1;
996 discard_candidate = 1;
998 if (discard_candidate)
1000 u32 next_range_bi = candidate_vnb->ip.reass.next_range_bi;
1001 // discard candidate range, probe next range
1003 ip4_full_reass_remove_range_from_chain (vm, node, rm, reass,
1005 candidate_range_bi);
1006 if (IP4_REASS_RC_OK != rc)
1010 if (~0 != next_range_bi)
1012 candidate_range_bi = next_range_bi;
1017 // special case - last range discarded
1019 ip4_full_reass_insert_range_in_chain (vm, rm, rt, reass,
1022 if (IP4_REASS_RC_OK != rc)
1032 ++reass->fragments_n;
1035 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
1037 ip4_full_reass_add_trace (vm, node, rm, reass, *bi0, RANGE_NEW, 0,
1041 if (~0 != reass->last_packet_octet &&
1042 reass->data_len == reass->last_packet_octet + 1)
1044 *handoff_thread_idx = reass->sendout_thread_index;
1046 reass->memory_owner_thread_index != reass->sendout_thread_index;
1048 ip4_full_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0,
1050 if (IP4_REASS_RC_OK == rc && handoff)
1052 rc = IP4_REASS_RC_HANDOFF;
1060 if (reass->fragments_n > rm->max_reass_len)
1062 rc = IP4_REASS_RC_TOO_MANY_FRAGMENTS;
1067 *next0 = IP4_FULL_REASS_NEXT_DROP;
1068 *error0 = IP4_ERROR_REASS_DUPLICATE_FRAGMENT;
1075 ip4_full_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1076 vlib_frame_t * frame, bool is_feature,
1079 u32 *from = vlib_frame_vector_args (frame);
1080 u32 n_left_from, n_left_to_next, *to_next, next_index;
1081 ip4_full_reass_main_t *rm = &ip4_full_reass_main;
1082 ip4_full_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
1083 clib_spinlock_lock (&rt->lock);
1085 n_left_from = frame->n_vectors;
1086 next_index = node->cached_next_index;
1087 while (n_left_from > 0)
1089 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1091 while (n_left_from > 0 && n_left_to_next > 0)
1096 u32 error0 = IP4_ERROR_NONE;
1099 b0 = vlib_get_buffer (vm, bi0);
1101 ip4_header_t *ip0 = vlib_buffer_get_current (b0);
1102 if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0))
1104 // this is a whole packet - no fragmentation
1107 next0 = IP4_FULL_REASS_NEXT_INPUT;
1111 next0 = vnet_buffer (b0)->ip.reass.next_index;
1113 goto packet_enqueue;
1115 const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
1116 const u32 fragment_length =
1117 clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0);
1118 const u32 fragment_last = fragment_first + fragment_length - 1;
1119 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
1121 next0 = IP4_FULL_REASS_NEXT_DROP;
1122 error0 = IP4_ERROR_REASS_MALFORMED_PACKET;
1123 goto packet_enqueue;
1125 ip4_full_reass_kv_t kv;
1129 (u64) vec_elt (ip4_main.fib_index_by_sw_if_index,
1130 vnet_buffer (b0)->sw_if_index[VLIB_RX]) |
1131 (u64) ip0->src_address.as_u32 << 32;
1133 (u64) ip0->dst_address.
1134 as_u32 | (u64) ip0->fragment_id << 32 | (u64) ip0->protocol << 48;
1136 ip4_full_reass_t *reass =
1137 ip4_full_reass_find_or_create (vm, node, rm, rt, &kv,
1142 const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
1143 if (0 == fragment_first)
1145 reass->sendout_thread_index = vm->thread_index;
1149 if (PREDICT_FALSE (do_handoff))
1151 next0 = IP4_FULL_REASS_NEXT_HANDOFF;
1152 vnet_buffer (b0)->ip.reass.owner_thread_index =
1153 kv.v.memory_owner_thread_index;
1157 u32 handoff_thread_idx;
1158 switch (ip4_full_reass_update
1159 (vm, node, rm, rt, reass, &bi0, &next0,
1160 &error0, is_custom_app, &handoff_thread_idx))
1162 case IP4_REASS_RC_OK:
1163 /* nothing to do here */
1165 case IP4_REASS_RC_HANDOFF:
1166 next0 = IP4_FULL_REASS_NEXT_HANDOFF;
1167 b0 = vlib_get_buffer (vm, bi0);
1168 vnet_buffer (b0)->ip.reass.owner_thread_index =
1171 case IP4_REASS_RC_TOO_MANY_FRAGMENTS:
1172 vlib_node_increment_counter (vm, node->node_index,
1173 IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
1175 ip4_full_reass_drop_all (vm, node, rm, reass);
1176 ip4_full_reass_free (rm, rt, reass);
1179 case IP4_REASS_RC_NO_BUF:
1180 vlib_node_increment_counter (vm, node->node_index,
1181 IP4_ERROR_REASS_NO_BUF, 1);
1182 ip4_full_reass_drop_all (vm, node, rm, reass);
1183 ip4_full_reass_free (rm, rt, reass);
1186 case IP4_REASS_RC_INTERNAL_ERROR:
1187 /* drop everything and start with a clean slate */
1188 vlib_node_increment_counter (vm, node->node_index,
1189 IP4_ERROR_REASS_INTERNAL_ERROR,
1191 ip4_full_reass_drop_all (vm, node, rm, reass);
1192 ip4_full_reass_free (rm, rt, reass);
1199 next0 = IP4_FULL_REASS_NEXT_DROP;
1200 error0 = IP4_ERROR_REASS_LIMIT_REACHED;
1205 b0->error = node->errors[error0];
1211 n_left_to_next -= 1;
1212 if (next0 == IP4_FULL_REASS_NEXT_HANDOFF)
1214 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1216 ip4_full_reass_add_trace (vm, node, rm, NULL, bi0,
1218 vnet_buffer (b0)->ip.
1219 reass.owner_thread_index);
1222 else if (is_feature && IP4_ERROR_NONE == error0)
1224 b0 = vlib_get_buffer (vm, bi0);
1225 vnet_feature_next (&next0, b0);
1227 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1228 to_next, n_left_to_next,
1230 IP4_REASS_DEBUG_BUFFER (bi0, enqueue_next);
1238 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1241 clib_spinlock_unlock (&rt->lock);
1242 return frame->n_vectors;
1245 static char *ip4_full_reass_error_strings[] = {
1246 #define _(sym, string) string,
1251 VLIB_NODE_FN (ip4_full_reass_node) (vlib_main_t * vm,
1252 vlib_node_runtime_t * node,
1253 vlib_frame_t * frame)
1255 return ip4_full_reass_inline (vm, node, frame, false /* is_feature */ ,
1256 false /* is_custom_app */ );
1260 VLIB_REGISTER_NODE (ip4_full_reass_node) = {
1261 .name = "ip4-full-reassembly",
1262 .vector_size = sizeof (u32),
1263 .format_trace = format_ip4_full_reass_trace,
1264 .n_errors = ARRAY_LEN (ip4_full_reass_error_strings),
1265 .error_strings = ip4_full_reass_error_strings,
1266 .n_next_nodes = IP4_FULL_REASS_N_NEXT,
1269 [IP4_FULL_REASS_NEXT_INPUT] = "ip4-input",
1270 [IP4_FULL_REASS_NEXT_DROP] = "ip4-drop",
1271 [IP4_FULL_REASS_NEXT_HANDOFF] = "ip4-full-reassembly-handoff",
1277 VLIB_NODE_FN (ip4_full_reass_node_feature) (vlib_main_t * vm,
1278 vlib_node_runtime_t * node,
1279 vlib_frame_t * frame)
1281 return ip4_full_reass_inline (vm, node, frame, true /* is_feature */ ,
1282 false /* is_custom_app */ );
1286 VLIB_REGISTER_NODE (ip4_full_reass_node_feature) = {
1287 .name = "ip4-full-reassembly-feature",
1288 .vector_size = sizeof (u32),
1289 .format_trace = format_ip4_full_reass_trace,
1290 .n_errors = ARRAY_LEN (ip4_full_reass_error_strings),
1291 .error_strings = ip4_full_reass_error_strings,
1292 .n_next_nodes = IP4_FULL_REASS_N_NEXT,
1295 [IP4_FULL_REASS_NEXT_INPUT] = "ip4-input",
1296 [IP4_FULL_REASS_NEXT_DROP] = "ip4-drop",
1297 [IP4_FULL_REASS_NEXT_HANDOFF] = "ip4-full-reass-feature-hoff",
1303 VNET_FEATURE_INIT (ip4_full_reass_feature, static) = {
1304 .arc_name = "ip4-unicast",
1305 .node_name = "ip4-full-reassembly-feature",
1306 .runs_before = VNET_FEATURES ("ip4-lookup",
1307 "ipsec4-input-feature"),
1312 #ifndef CLIB_MARCH_VARIANT
1314 ip4_full_reass_get_nbuckets ()
1316 ip4_full_reass_main_t *rm = &ip4_full_reass_main;
1320 nbuckets = (u32) (rm->max_reass_n / IP4_REASS_HT_LOAD_FACTOR);
1322 for (i = 0; i < 31; i++)
1323 if ((1 << i) >= nbuckets)
1329 #endif /* CLIB_MARCH_VARIANT */
1333 IP4_EVENT_CONFIG_CHANGED = 1,
1334 } ip4_full_reass_event_t;
1339 clib_bihash_16_8_t *new_hash;
1340 } ip4_rehash_cb_ctx;
1342 #ifndef CLIB_MARCH_VARIANT
1344 ip4_rehash_cb (clib_bihash_kv_16_8_t * kv, void *_ctx)
1346 ip4_rehash_cb_ctx *ctx = _ctx;
1347 if (clib_bihash_add_del_16_8 (ctx->new_hash, kv, 1))
1354 ip4_full_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
1355 u32 max_reassembly_length,
1356 u32 expire_walk_interval_ms)
1358 ip4_full_reass_main.timeout_ms = timeout_ms;
1359 ip4_full_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
1360 ip4_full_reass_main.max_reass_n = max_reassemblies;
1361 ip4_full_reass_main.max_reass_len = max_reassembly_length;
1362 ip4_full_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
1366 ip4_full_reass_set (u32 timeout_ms, u32 max_reassemblies,
1367 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1369 u32 old_nbuckets = ip4_full_reass_get_nbuckets ();
1370 ip4_full_reass_set_params (timeout_ms, max_reassemblies,
1371 max_reassembly_length, expire_walk_interval_ms);
1372 vlib_process_signal_event (ip4_full_reass_main.vlib_main,
1373 ip4_full_reass_main.ip4_full_reass_expire_node_idx,
1374 IP4_EVENT_CONFIG_CHANGED, 0);
1375 u32 new_nbuckets = ip4_full_reass_get_nbuckets ();
1376 if (ip4_full_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
1378 clib_bihash_16_8_t new_hash;
1379 clib_memset (&new_hash, 0, sizeof (new_hash));
1380 ip4_rehash_cb_ctx ctx;
1382 ctx.new_hash = &new_hash;
1383 clib_bihash_init_16_8 (&new_hash, "ip4-dr", new_nbuckets,
1384 new_nbuckets * 1024);
1385 clib_bihash_foreach_key_value_pair_16_8 (&ip4_full_reass_main.hash,
1386 ip4_rehash_cb, &ctx);
1389 clib_bihash_free_16_8 (&new_hash);
1394 clib_bihash_free_16_8 (&ip4_full_reass_main.hash);
1395 clib_memcpy_fast (&ip4_full_reass_main.hash, &new_hash,
1396 sizeof (ip4_full_reass_main.hash));
1397 clib_bihash_copied (&ip4_full_reass_main.hash, &new_hash);
1404 ip4_full_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
1405 u32 * max_reassembly_length,
1406 u32 * expire_walk_interval_ms)
1408 *timeout_ms = ip4_full_reass_main.timeout_ms;
1409 *max_reassemblies = ip4_full_reass_main.max_reass_n;
1410 *max_reassembly_length = ip4_full_reass_main.max_reass_len;
1411 *expire_walk_interval_ms = ip4_full_reass_main.expire_walk_interval_ms;
1415 static clib_error_t *
1416 ip4_full_reass_init_function (vlib_main_t * vm)
1418 ip4_full_reass_main_t *rm = &ip4_full_reass_main;
1419 clib_error_t *error = 0;
1425 vec_validate (rm->per_thread_data, vlib_num_workers ());
1426 ip4_full_reass_per_thread_t *rt;
1427 vec_foreach (rt, rm->per_thread_data)
1429 clib_spinlock_init (&rt->lock);
1430 pool_alloc (rt->pool, rm->max_reass_n);
1433 node = vlib_get_node_by_name (vm, (u8 *) "ip4-full-reassembly-expire-walk");
1435 rm->ip4_full_reass_expire_node_idx = node->index;
1437 ip4_full_reass_set_params (IP4_REASS_TIMEOUT_DEFAULT_MS,
1438 IP4_REASS_MAX_REASSEMBLIES_DEFAULT,
1439 IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
1440 IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
1442 nbuckets = ip4_full_reass_get_nbuckets ();
1443 clib_bihash_init_16_8 (&rm->hash, "ip4-dr", nbuckets, nbuckets * 1024);
1445 node = vlib_get_node_by_name (vm, (u8 *) "ip4-drop");
1447 rm->ip4_drop_idx = node->index;
1449 rm->fq_index = vlib_frame_queue_main_init (ip4_full_reass_node.index, 0);
1450 rm->fq_feature_index =
1451 vlib_frame_queue_main_init (ip4_full_reass_node_feature.index, 0);
1453 rm->feature_use_refcount_per_intf = NULL;
1457 VLIB_INIT_FUNCTION (ip4_full_reass_init_function);
1458 #endif /* CLIB_MARCH_VARIANT */
1461 ip4_full_reass_walk_expired (vlib_main_t * vm,
1462 vlib_node_runtime_t * node, vlib_frame_t * f)
1464 ip4_full_reass_main_t *rm = &ip4_full_reass_main;
1465 uword event_type, *event_data = 0;
1469 vlib_process_wait_for_event_or_clock (vm,
1471 rm->expire_walk_interval_ms /
1472 (f64) MSEC_PER_SEC);
1473 event_type = vlib_process_get_events (vm, &event_data);
1477 case ~0: /* no events => timeout */
1478 /* nothing to do here */
1480 case IP4_EVENT_CONFIG_CHANGED:
1483 clib_warning ("BUG: event type 0x%wx", event_type);
1486 f64 now = vlib_time_now (vm);
1488 ip4_full_reass_t *reass;
1489 int *pool_indexes_to_free = NULL;
1491 uword thread_index = 0;
1493 const uword nthreads = vlib_num_workers () + 1;
1494 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1496 ip4_full_reass_per_thread_t *rt =
1497 &rm->per_thread_data[thread_index];
1498 clib_spinlock_lock (&rt->lock);
1500 vec_reset_length (pool_indexes_to_free);
1502 pool_foreach_index (index, rt->pool, ({
1503 reass = pool_elt_at_index (rt->pool, index);
1504 if (now > reass->last_heard + rm->timeout)
1506 vec_add1 (pool_indexes_to_free, index);
1512 vec_foreach (i, pool_indexes_to_free)
1514 ip4_full_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
1515 ip4_full_reass_drop_all (vm, node, rm, reass);
1516 ip4_full_reass_free (rm, rt, reass);
1520 clib_spinlock_unlock (&rt->lock);
1523 vec_free (pool_indexes_to_free);
1526 _vec_len (event_data) = 0;
1534 VLIB_REGISTER_NODE (ip4_full_reass_expire_node) = {
1535 .function = ip4_full_reass_walk_expired,
1536 .type = VLIB_NODE_TYPE_PROCESS,
1537 .name = "ip4-full-reassembly-expire-walk",
1538 .format_trace = format_ip4_full_reass_trace,
1539 .n_errors = ARRAY_LEN (ip4_full_reass_error_strings),
1540 .error_strings = ip4_full_reass_error_strings,
1546 format_ip4_full_reass_key (u8 * s, va_list * args)
1548 ip4_full_reass_key_t *key = va_arg (*args, ip4_full_reass_key_t *);
1551 "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
1552 key->xx_id, format_ip4_address, &key->src, format_ip4_address,
1553 &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
1558 format_ip4_reass (u8 * s, va_list * args)
1560 vlib_main_t *vm = va_arg (*args, vlib_main_t *);
1561 ip4_full_reass_t *reass = va_arg (*args, ip4_full_reass_t *);
1563 s = format (s, "ID: %lu, key: %U\n first_bi: %u, data_len: %u, "
1564 "last_packet_octet: %u, trace_op_counter: %u\n",
1565 reass->id, format_ip4_full_reass_key, &reass->key,
1566 reass->first_bi, reass->data_len,
1567 reass->last_packet_octet, reass->trace_op_counter);
1569 u32 bi = reass->first_bi;
1573 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
1574 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
1577 " #%03u: range: [%u, %u], bi: %u, off: %d, len: %u, "
1578 "fragment[%u, %u]\n", counter, vnb->ip.reass.range_first,
1579 vnb->ip.reass.range_last, bi,
1580 ip4_full_reass_buffer_get_data_offset (b),
1581 ip4_full_reass_buffer_get_data_len (b),
1582 vnb->ip.reass.fragment_first, vnb->ip.reass.fragment_last);
1583 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
1585 bi = b->next_buffer;
1595 static clib_error_t *
1596 show_ip4_reass (vlib_main_t * vm,
1597 unformat_input_t * input,
1598 CLIB_UNUSED (vlib_cli_command_t * lmd))
1600 ip4_full_reass_main_t *rm = &ip4_full_reass_main;
1602 vlib_cli_output (vm, "---------------------");
1603 vlib_cli_output (vm, "IP4 reassembly status");
1604 vlib_cli_output (vm, "---------------------");
1605 bool details = false;
1606 if (unformat (input, "details"))
1611 u32 sum_reass_n = 0;
1612 ip4_full_reass_t *reass;
1614 const uword nthreads = vlib_num_workers () + 1;
1615 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1617 ip4_full_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1618 clib_spinlock_lock (&rt->lock);
1622 pool_foreach (reass, rt->pool, {
1623 vlib_cli_output (vm, "%U", format_ip4_reass, vm, reass);
1627 sum_reass_n += rt->reass_n;
1628 clib_spinlock_unlock (&rt->lock);
1630 vlib_cli_output (vm, "---------------------");
1631 vlib_cli_output (vm, "Current IP4 reassemblies count: %lu\n",
1632 (long unsigned) sum_reass_n);
1633 vlib_cli_output (vm,
1634 "Maximum configured concurrent IP4 reassemblies per worker-thread: %lu\n",
1635 (long unsigned) rm->max_reass_n);
1640 VLIB_CLI_COMMAND (show_ip4_full_reass_cmd, static) = {
1641 .path = "show ip4-full-reassembly",
1642 .short_help = "show ip4-full-reassembly [details]",
1643 .function = show_ip4_reass,
1647 #ifndef CLIB_MARCH_VARIANT
1649 ip4_full_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
1651 return vnet_feature_enable_disable ("ip4-unicast",
1652 "ip4-full-reassembly-feature",
1653 sw_if_index, enable_disable, 0, 0);
1655 #endif /* CLIB_MARCH_VARIANT */
1658 #define foreach_ip4_full_reass_handoff_error \
1659 _(CONGESTION_DROP, "congestion drop")
1664 #define _(sym,str) IP4_FULL_REASS_HANDOFF_ERROR_##sym,
1665 foreach_ip4_full_reass_handoff_error
1667 IP4_FULL_REASS_HANDOFF_N_ERROR,
1668 } ip4_full_reass_handoff_error_t;
1670 static char *ip4_full_reass_handoff_error_strings[] = {
1671 #define _(sym,string) string,
1672 foreach_ip4_full_reass_handoff_error
1678 u32 next_worker_index;
1679 } ip4_full_reass_handoff_trace_t;
1682 format_ip4_full_reass_handoff_trace (u8 * s, va_list * args)
1684 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1685 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1686 ip4_full_reass_handoff_trace_t *t =
1687 va_arg (*args, ip4_full_reass_handoff_trace_t *);
1690 format (s, "ip4-full-reassembly-handoff: next-worker %d",
1691 t->next_worker_index);
1697 ip4_full_reass_handoff_node_inline (vlib_main_t * vm,
1698 vlib_node_runtime_t * node,
1699 vlib_frame_t * frame, bool is_feature)
1701 ip4_full_reass_main_t *rm = &ip4_full_reass_main;
1703 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1704 u32 n_enq, n_left_from, *from;
1705 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
1708 from = vlib_frame_vector_args (frame);
1709 n_left_from = frame->n_vectors;
1710 vlib_get_buffers (vm, from, bufs, n_left_from);
1713 ti = thread_indices;
1715 fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
1717 while (n_left_from > 0)
1719 ti[0] = vnet_buffer (b[0])->ip.reass.owner_thread_index;
1722 ((node->flags & VLIB_NODE_FLAG_TRACE)
1723 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1725 ip4_full_reass_handoff_trace_t *t =
1726 vlib_add_trace (vm, node, b[0], sizeof (*t));
1727 t->next_worker_index = ti[0];
1735 vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
1736 frame->n_vectors, 1);
1738 if (n_enq < frame->n_vectors)
1739 vlib_node_increment_counter (vm, node->node_index,
1740 IP4_FULL_REASS_HANDOFF_ERROR_CONGESTION_DROP,
1741 frame->n_vectors - n_enq);
1742 return frame->n_vectors;
1745 VLIB_NODE_FN (ip4_full_reass_handoff_node) (vlib_main_t * vm,
1746 vlib_node_runtime_t * node,
1747 vlib_frame_t * frame)
1749 return ip4_full_reass_handoff_node_inline (vm, node, frame,
1750 false /* is_feature */ );
1755 VLIB_REGISTER_NODE (ip4_full_reass_handoff_node) = {
1756 .name = "ip4-full-reassembly-handoff",
1757 .vector_size = sizeof (u32),
1758 .n_errors = ARRAY_LEN(ip4_full_reass_handoff_error_strings),
1759 .error_strings = ip4_full_reass_handoff_error_strings,
1760 .format_trace = format_ip4_full_reass_handoff_trace,
1772 VLIB_NODE_FN (ip4_full_reass_feature_handoff_node) (vlib_main_t * vm,
1773 vlib_node_runtime_t *
1775 vlib_frame_t * frame)
1777 return ip4_full_reass_handoff_node_inline (vm, node, frame,
1778 true /* is_feature */ );
1784 VLIB_REGISTER_NODE (ip4_full_reass_feature_handoff_node) = {
1785 .name = "ip4-full-reass-feature-hoff",
1786 .vector_size = sizeof (u32),
1787 .n_errors = ARRAY_LEN(ip4_full_reass_handoff_error_strings),
1788 .error_strings = ip4_full_reass_handoff_error_strings,
1789 .format_trace = format_ip4_full_reass_handoff_trace,
1799 #ifndef CLIB_MARCH_VARIANT
1801 ip4_full_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable)
1803 ip4_full_reass_main_t *rm = &ip4_full_reass_main;
1804 vec_validate (rm->feature_use_refcount_per_intf, sw_if_index);
1807 if (!rm->feature_use_refcount_per_intf[sw_if_index])
1809 ++rm->feature_use_refcount_per_intf[sw_if_index];
1810 return vnet_feature_enable_disable ("ip4-unicast",
1811 "ip4-full-reassembly-feature",
1812 sw_if_index, 1, 0, 0);
1814 ++rm->feature_use_refcount_per_intf[sw_if_index];
1818 --rm->feature_use_refcount_per_intf[sw_if_index];
1819 if (!rm->feature_use_refcount_per_intf[sw_if_index])
1820 return vnet_feature_enable_disable ("ip4-unicast",
1821 "ip4-full-reassembly-feature",
1822 sw_if_index, 0, 0, 0);
1829 * fd.io coding-style-patch-verification: ON
1832 * eval: (c-set-style "gnu")