2 * Copyright (c) 2017 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
18 * @brief IPv4 Reassembly.
20 * This file contains the source code for IPv4 reassembly.
23 #include <vppinfra/vec.h>
24 #include <vnet/vnet.h>
25 #include <vnet/ip/ip.h>
26 #include <vppinfra/bihash_16_8.h>
27 #include <vnet/ip/ip4_reassembly.h>
30 #define MSEC_PER_SEC 1000
31 #define IP4_REASS_TIMEOUT_DEFAULT_MS 100
32 #define IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
33 #define IP4_REASS_MAX_REASSEMBLIES_DEFAULT 1024
34 #define IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
35 #define IP4_REASS_HT_LOAD_FACTOR (0.75)
37 #define IP4_REASS_DEBUG_BUFFERS 0
38 #if IP4_REASS_DEBUG_BUFFERS
39 #define IP4_REASS_DEBUG_BUFFER(bi, what) \
43 printf (#what "buffer %u", _bi); \
44 vlib_buffer_t *_b = vlib_get_buffer (vm, _bi); \
45 while (_b->flags & VLIB_BUFFER_NEXT_PRESENT) \
47 _bi = _b->next_buffer; \
48 printf ("[%u]", _bi); \
49 _b = vlib_get_buffer (vm, _bi); \
56 #define IP4_REASS_DEBUG_BUFFER(...)
62 IP4_REASS_RC_TOO_MANY_FRAGMENTS,
63 IP4_REASS_RC_INTERNAL_ERROR,
90 u32 memory_owner_thread_index;
102 clib_bihash_kv_16_8_t kv;
106 ip4_reass_buffer_get_data_offset (vlib_buffer_t * b)
108 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
109 return vnb->ip.reass.range_first - vnb->ip.reass.fragment_first;
113 ip4_reass_buffer_get_data_len (vlib_buffer_t * b)
115 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
116 return clib_min (vnb->ip.reass.range_last, vnb->ip.reass.fragment_last) -
117 (vnb->ip.reass.fragment_first + ip4_reass_buffer_get_data_offset (b)) + 1;
124 // time when last packet was received
126 // internal id of this reassembly
128 // buffer index of first buffer in this reassembly context
130 // last octet of packet, ~0 until fragment without more_fragments arrives
131 u32 last_packet_octet;
132 // length of data collected so far
134 // trace operation counter
135 u32 trace_op_counter;
136 // next index - used by non-feature node
138 // error next index - used by custom apps (~0 if not used)
139 u32 error_next_index;
140 // minimum fragment length for this reassembly - used to estimate MTU
141 u16 min_fragment_length;
142 // number of fragments in this reassembly
144 // thread owning memory for this context (whose pool contains this ctx)
145 u32 memory_owner_thread_index;
146 // thread which received fragment with offset 0 and which sends out the
147 // completed reassembly
148 u32 sendout_thread_index;
153 // pool of reassembly contexts
157 clib_spinlock_t lock;
158 } ip4_reass_per_thread_t;
165 u32 expire_walk_interval_ms;
166 // maximum number of fragments in one reassembly
168 // maximum number of reassemblies
172 clib_bihash_16_8_t hash;
174 ip4_reass_per_thread_t *per_thread_data;
177 vlib_main_t *vlib_main;
179 // node index of ip4-drop node
181 u32 ip4_reass_expire_node_idx;
183 /** Worker handoff */
185 u32 fq_feature_index;
188 extern ip4_reass_main_t ip4_reass_main;
190 #ifndef CLIB_MARCH_VARIANT
191 ip4_reass_main_t ip4_reass_main;
192 #endif /* CLIB_MARCH_VARIANT */
196 IP4_REASSEMBLY_NEXT_INPUT,
197 IP4_REASSEMBLY_NEXT_DROP,
198 IP4_REASSEMBLY_NEXT_HANDOFF,
199 IP4_REASSEMBLY_N_NEXT,
210 } ip4_reass_trace_operation_e;
220 } ip4_reass_range_trace_t;
224 ip4_reass_trace_operation_e action;
226 ip4_reass_range_trace_t trace_range;
236 extern vlib_node_registration_t ip4_reass_node;
237 extern vlib_node_registration_t ip4_reass_node_feature;
240 ip4_reass_trace_details (vlib_main_t * vm, u32 bi,
241 ip4_reass_range_trace_t * trace)
243 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
244 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
245 trace->range_first = vnb->ip.reass.range_first;
246 trace->range_last = vnb->ip.reass.range_last;
247 trace->data_offset = ip4_reass_buffer_get_data_offset (b);
248 trace->data_len = ip4_reass_buffer_get_data_len (b);
249 trace->range_bi = bi;
253 format_ip4_reass_range_trace (u8 * s, va_list * args)
255 ip4_reass_range_trace_t *trace = va_arg (*args, ip4_reass_range_trace_t *);
256 s = format (s, "range: [%u, %u], off %d, len %u, bi %u", trace->range_first,
257 trace->range_last, trace->data_offset, trace->data_len,
263 format_ip4_reass_trace (u8 * s, va_list * args)
265 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
266 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
267 ip4_reass_trace_t *t = va_arg (*args, ip4_reass_trace_t *);
269 if (~0 != t->reass_id)
271 s = format (s, "reass id: %u, op id: %u, ", t->reass_id, t->op_id);
272 indent = format_get_indent (s);
275 "first bi: %u, data len: %u, ip/fragment[%u, %u]",
276 t->trace_range.first_bi, t->total_data_len, t->fragment_first,
282 s = format (s, "\n%Ushrink %U by %u", format_white_space, indent,
283 format_ip4_reass_range_trace, &t->trace_range,
287 s = format (s, "\n%Udiscard %U", format_white_space, indent,
288 format_ip4_reass_range_trace, &t->trace_range);
291 s = format (s, "\n%Unew %U", format_white_space, indent,
292 format_ip4_reass_range_trace, &t->trace_range);
295 s = format (s, "\n%Uoverlapping/ignored %U", format_white_space, indent,
296 format_ip4_reass_range_trace, &t->trace_range);
299 s = format (s, "\n%Ufinalize reassembly", format_white_space, indent);
303 format (s, "handoff from thread #%u to thread #%u", t->thread_id,
311 ip4_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
312 ip4_reass_main_t * rm, u32 reass_id, u32 op_id,
313 u32 bi, u32 first_bi, u32 data_len,
314 ip4_reass_trace_operation_e action, u32 size_diff,
317 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
318 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
319 ip4_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
320 t->reass_id = reass_id;
322 ip4_reass_trace_details (vm, bi, &t->trace_range);
323 t->size_diff = size_diff;
325 t->thread_id = vm->thread_index;
326 t->thread_id_to = thread_id_to;
327 t->fragment_first = vnb->ip.reass.fragment_first;
328 t->fragment_last = vnb->ip.reass.fragment_last;
329 t->trace_range.first_bi = first_bi;
330 t->total_data_len = data_len;
333 s = format (s, "%U", format_ip4_reass_trace, NULL, NULL, t);
334 printf ("%.*s\n", vec_len (s), s);
336 vec_reset_length (s);
341 ip4_reass_free_ctx (ip4_reass_per_thread_t * rt, ip4_reass_t * reass)
343 pool_put (rt->pool, reass);
348 ip4_reass_free (vlib_main_t * vm, ip4_reass_main_t * rm,
349 ip4_reass_per_thread_t * rt, ip4_reass_t * reass)
351 clib_bihash_kv_16_8_t kv;
352 kv.key[0] = reass->key.as_u64[0];
353 kv.key[1] = reass->key.as_u64[1];
354 clib_bihash_add_del_16_8 (&rm->hash, &kv, 0);
355 return ip4_reass_free_ctx (rt, reass);
359 ip4_reass_drop_all (vlib_main_t * vm, vlib_node_runtime_t * node,
360 ip4_reass_main_t * rm, ip4_reass_t * reass)
362 u32 range_bi = reass->first_bi;
363 vlib_buffer_t *range_b;
364 vnet_buffer_opaque_t *range_vnb;
366 while (~0 != range_bi)
368 range_b = vlib_get_buffer (vm, range_bi);
369 range_vnb = vnet_buffer (range_b);
373 vec_add1 (to_free, bi);
374 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
375 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
378 b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
385 range_bi = range_vnb->ip.reass.next_range_bi;
387 /* send to next_error_index */
388 if (~0 != reass->error_next_index)
390 u32 n_left_to_next, *to_next, next_index;
392 next_index = reass->error_next_index;
395 while (vec_len (to_free) > 0)
397 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
399 while (vec_len (to_free) > 0 && n_left_to_next > 0)
401 bi = vec_pop (to_free);
410 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
415 vlib_buffer_free (vm, to_free, vec_len (to_free));
420 ip4_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
421 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
422 ip4_reass_kv_t * kv, u8 * do_handoff)
430 now = vlib_time_now (vm);
431 if (!clib_bihash_search_16_8
432 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, (clib_bihash_kv_16_8_t *) kv))
435 pool_elt_at_index (rm->per_thread_data
436 [kv->v.memory_owner_thread_index].pool,
438 if (vm->thread_index != reass->memory_owner_thread_index)
444 if (now > reass->last_heard + rm->timeout)
446 ip4_reass_drop_all (vm, node, rm, reass);
447 ip4_reass_free (vm, rm, rt, reass);
454 reass->last_heard = now;
458 if (rt->reass_n >= rm->max_reass_n)
465 pool_get (rt->pool, reass);
466 clib_memset (reass, 0, sizeof (*reass));
467 reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
468 reass->memory_owner_thread_index = vm->thread_index;
470 reass->first_bi = ~0;
471 reass->last_packet_octet = ~0;
473 reass->next_index = ~0;
474 reass->error_next_index = ~0;
478 reass->key.as_u64[0] = ((clib_bihash_kv_16_8_t *) kv)->key[0];
479 reass->key.as_u64[1] = ((clib_bihash_kv_16_8_t *) kv)->key[1];
480 kv->v.reass_index = (reass - rt->pool);
481 kv->v.memory_owner_thread_index = vm->thread_index;
482 reass->last_heard = now;
485 clib_bihash_add_del_16_8 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, 2);
488 ip4_reass_free_ctx (rt, reass);
490 // if other worker created a context already work with the other copy
498 always_inline ip4_reass_rc_t
499 ip4_reass_finalize (vlib_main_t * vm, vlib_node_runtime_t * node,
500 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
501 ip4_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
504 vlib_buffer_t *first_b = vlib_get_buffer (vm, reass->first_bi);
505 vlib_buffer_t *last_b = NULL;
506 u32 sub_chain_bi = reass->first_bi;
507 u32 total_length = 0;
511 u32 tmp_bi = sub_chain_bi;
512 vlib_buffer_t *tmp = vlib_get_buffer (vm, tmp_bi);
513 ip4_header_t *ip = vlib_buffer_get_current (tmp);
514 vnet_buffer_opaque_t *vnb = vnet_buffer (tmp);
515 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
516 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
518 return IP4_REASS_RC_INTERNAL_ERROR;
521 u32 data_len = ip4_reass_buffer_get_data_len (tmp);
523 ip4_header_bytes (ip) + ip4_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 ip4 header */
529 if (0 != ip4_reass_buffer_get_data_offset (tmp))
531 return IP4_REASS_RC_INTERNAL_ERROR;
534 trim_end = vlib_buffer_length_in_chain (vm, tmp) - data_len -
535 ip4_header_bytes (ip);
536 if (!(vlib_buffer_length_in_chain (vm, tmp) - trim_end > 0))
538 return IP4_REASS_RC_INTERNAL_ERROR;
542 vlib_buffer_length_in_chain (vm, tmp) - trim_front - trim_end;
548 if (trim_front > tmp->current_length)
550 /* drop whole buffer */
551 u32 to_be_freed_bi = tmp_bi;
552 trim_front -= tmp->current_length;
553 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
555 return IP4_REASS_RC_INTERNAL_ERROR;
557 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
558 tmp_bi = tmp->next_buffer;
559 tmp->next_buffer = 0;
560 tmp = vlib_get_buffer (vm, tmp_bi);
561 vlib_buffer_free_one (vm, to_be_freed_bi);
566 vlib_buffer_advance (tmp, trim_front);
574 last_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
575 last_b->next_buffer = tmp_bi;
578 if (keep_data <= tmp->current_length)
580 tmp->current_length = keep_data;
585 keep_data -= tmp->current_length;
586 if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
588 return IP4_REASS_RC_INTERNAL_ERROR;
591 total_length += tmp->current_length;
592 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
594 tmp_bi = tmp->next_buffer;
595 tmp = vlib_get_buffer (vm, tmp->next_buffer);
604 u32 to_be_freed_bi = tmp_bi;
605 if (reass->first_bi == tmp_bi)
607 return IP4_REASS_RC_INTERNAL_ERROR;
609 if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
611 tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
612 tmp_bi = tmp->next_buffer;
613 tmp->next_buffer = 0;
614 tmp = vlib_get_buffer (vm, tmp_bi);
615 vlib_buffer_free_one (vm, to_be_freed_bi);
619 tmp->next_buffer = 0;
620 vlib_buffer_free_one (vm, to_be_freed_bi);
626 vnet_buffer (vlib_get_buffer (vm, sub_chain_bi))->ip.
629 while (~0 != sub_chain_bi);
633 return IP4_REASS_RC_INTERNAL_ERROR;
635 last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
637 if (total_length < first_b->current_length)
639 return IP4_REASS_RC_INTERNAL_ERROR;
641 total_length -= first_b->current_length;
642 first_b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
643 first_b->total_length_not_including_first_buffer = total_length;
644 ip4_header_t *ip = vlib_buffer_get_current (first_b);
645 ip->flags_and_fragment_offset = 0;
646 ip->length = clib_host_to_net_u16 (first_b->current_length + total_length);
647 ip->checksum = ip4_header_checksum (ip);
648 if (!vlib_buffer_chain_linearize (vm, first_b))
650 return IP4_REASS_RC_NO_BUF;
652 // reset to reconstruct the mbuf linking
653 first_b->flags &= ~VLIB_BUFFER_EXT_HDR_VALID;
654 if (PREDICT_FALSE (first_b->flags & VLIB_BUFFER_IS_TRACED))
656 ip4_reass_add_trace (vm, node, rm, reass->id, reass->trace_op_counter,
657 reass->first_bi, reass->first_bi, reass->data_len,
659 ++reass->trace_op_counter;
661 // following code does a hexdump of packet fragments to stdout ...
664 u32 bi = reass->first_bi;
668 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
669 s = format (s, "%u: %U\n", bi, format_hexdump,
670 vlib_buffer_get_current (b), b->current_length);
671 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
680 printf ("%.*s\n", vec_len (s), s);
687 *bi0 = reass->first_bi;
690 *next0 = IP4_REASSEMBLY_NEXT_INPUT;
694 *next0 = reass->next_index;
696 vnet_buffer (first_b)->ip.reass.estimated_mtu = reass->min_fragment_length;
697 *error0 = IP4_ERROR_NONE;
698 ip4_reass_free (vm, rm, rt, reass);
700 return IP4_REASS_RC_OK;
703 always_inline ip4_reass_rc_t
704 ip4_reass_insert_range_in_chain (vlib_main_t * vm,
705 ip4_reass_main_t * rm,
706 ip4_reass_per_thread_t * rt,
708 u32 prev_range_bi, u32 new_next_bi)
710 vlib_buffer_t *new_next_b = vlib_get_buffer (vm, new_next_bi);
711 vnet_buffer_opaque_t *new_next_vnb = vnet_buffer (new_next_b);
712 if (~0 != prev_range_bi)
714 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
715 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
716 new_next_vnb->ip.reass.next_range_bi = prev_vnb->ip.reass.next_range_bi;
717 prev_vnb->ip.reass.next_range_bi = new_next_bi;
721 if (~0 != reass->first_bi)
723 new_next_vnb->ip.reass.next_range_bi = reass->first_bi;
725 reass->first_bi = new_next_bi;
727 vnet_buffer_opaque_t *vnb = vnet_buffer (new_next_b);
728 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
729 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
731 return IP4_REASS_RC_INTERNAL_ERROR;
733 reass->data_len += ip4_reass_buffer_get_data_len (new_next_b);
734 return IP4_REASS_RC_OK;
737 always_inline ip4_reass_rc_t
738 ip4_reass_remove_range_from_chain (vlib_main_t * vm,
739 vlib_node_runtime_t * node,
740 ip4_reass_main_t * rm,
741 ip4_reass_t * reass, u32 prev_range_bi,
744 vlib_buffer_t *discard_b = vlib_get_buffer (vm, discard_bi);
745 vnet_buffer_opaque_t *discard_vnb = vnet_buffer (discard_b);
746 if (~0 != prev_range_bi)
748 vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi);
749 vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b);
750 if (!(prev_vnb->ip.reass.next_range_bi == discard_bi))
752 return IP4_REASS_RC_INTERNAL_ERROR;
754 prev_vnb->ip.reass.next_range_bi = discard_vnb->ip.reass.next_range_bi;
758 reass->first_bi = discard_vnb->ip.reass.next_range_bi;
760 vnet_buffer_opaque_t *vnb = vnet_buffer (discard_b);
761 if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) &&
762 !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first))
764 return IP4_REASS_RC_INTERNAL_ERROR;
766 reass->data_len -= ip4_reass_buffer_get_data_len (discard_b);
769 u32 to_be_freed_bi = discard_bi;
770 if (PREDICT_FALSE (discard_b->flags & VLIB_BUFFER_IS_TRACED))
772 ip4_reass_add_trace (vm, node, rm, reass->id,
773 reass->trace_op_counter, discard_bi,
774 reass->first_bi, reass->data_len,
775 RANGE_DISCARD, 0, ~0);
776 ++reass->trace_op_counter;
778 if (discard_b->flags & VLIB_BUFFER_NEXT_PRESENT)
780 discard_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
781 discard_bi = discard_b->next_buffer;
782 discard_b->next_buffer = 0;
783 discard_b = vlib_get_buffer (vm, discard_bi);
784 vlib_buffer_free_one (vm, to_be_freed_bi);
788 discard_b->next_buffer = 0;
789 vlib_buffer_free_one (vm, to_be_freed_bi);
793 return IP4_REASS_RC_OK;
796 always_inline ip4_reass_rc_t
797 ip4_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
798 ip4_reass_main_t * rm, ip4_reass_per_thread_t * rt,
799 ip4_reass_t * reass, u32 * bi0, u32 * next0, u32 * error0,
800 bool is_custom_app, u32 * handoff_thread_idx)
802 ip4_reass_rc_t rc = IP4_REASS_RC_OK;
804 vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0);
805 ip4_header_t *fip = vlib_buffer_get_current (fb);
806 vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
809 // store (error_)next_index before it's overwritten
810 reass->next_index = fvnb->ip.reass.next_index;
811 reass->error_next_index = fvnb->ip.reass.error_next_index;
813 const u32 fragment_first = ip4_get_fragment_offset_bytes (fip);
814 const u32 fragment_length =
815 clib_net_to_host_u16 (fip->length) - ip4_header_bytes (fip);
816 const u32 fragment_last = fragment_first + fragment_length - 1;
817 fvnb->ip.reass.fragment_first = fragment_first;
818 fvnb->ip.reass.fragment_last = fragment_last;
819 int more_fragments = ip4_get_fragment_more (fip);
820 u32 candidate_range_bi = reass->first_bi;
821 u32 prev_range_bi = ~0;
822 fvnb->ip.reass.range_first = fragment_first;
823 fvnb->ip.reass.range_last = fragment_last;
824 fvnb->ip.reass.next_range_bi = ~0;
827 reass->last_packet_octet = fragment_last;
829 if (~0 == reass->first_bi)
831 // starting a new reassembly
833 ip4_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
835 if (IP4_REASS_RC_OK != rc)
839 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
841 ip4_reass_add_trace (vm, node, rm, reass->id,
842 reass->trace_op_counter, *bi0, reass->first_bi,
843 reass->data_len, RANGE_NEW, 0, ~0);
844 ++reass->trace_op_counter;
847 reass->min_fragment_length = clib_net_to_host_u16 (fip->length);
848 reass->fragments_n = 1;
849 return IP4_REASS_RC_OK;
851 reass->min_fragment_length = clib_min (clib_net_to_host_u16 (fip->length),
852 fvnb->ip.reass.estimated_mtu);
853 while (~0 != candidate_range_bi)
855 vlib_buffer_t *candidate_b = vlib_get_buffer (vm, candidate_range_bi);
856 vnet_buffer_opaque_t *candidate_vnb = vnet_buffer (candidate_b);
857 if (fragment_first > candidate_vnb->ip.reass.range_last)
859 // this fragments starts after candidate range
860 prev_range_bi = candidate_range_bi;
861 candidate_range_bi = candidate_vnb->ip.reass.next_range_bi;
862 if (candidate_vnb->ip.reass.range_last < fragment_last &&
863 ~0 == candidate_range_bi)
865 // special case - this fragment falls beyond all known ranges
867 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
868 prev_range_bi, *bi0);
869 if (IP4_REASS_RC_OK != rc)
878 if (fragment_last < candidate_vnb->ip.reass.range_first)
880 // this fragment ends before candidate range without any overlap
882 ip4_reass_insert_range_in_chain (vm, rm, rt, reass, prev_range_bi,
884 if (IP4_REASS_RC_OK != rc)
892 if (fragment_first >= candidate_vnb->ip.reass.range_first &&
893 fragment_last <= candidate_vnb->ip.reass.range_last)
895 // this fragment is a (sub)part of existing range, ignore it
896 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
898 ip4_reass_add_trace (vm, node, rm, reass->id,
899 reass->trace_op_counter, *bi0,
900 reass->first_bi, reass->data_len,
901 RANGE_OVERLAP, 0, ~0);
902 ++reass->trace_op_counter;
906 int discard_candidate = 0;
907 if (fragment_first < candidate_vnb->ip.reass.range_first)
910 fragment_last - candidate_vnb->ip.reass.range_first + 1;
911 if (overlap < ip4_reass_buffer_get_data_len (candidate_b))
913 candidate_vnb->ip.reass.range_first += overlap;
914 if (reass->data_len < overlap)
916 return IP4_REASS_RC_INTERNAL_ERROR;
918 reass->data_len -= overlap;
919 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
921 ip4_reass_add_trace (vm, node, rm, reass->id,
922 reass->trace_op_counter,
924 reass->first_bi, reass->data_len,
925 RANGE_SHRINK, 0, ~0);
926 ++reass->trace_op_counter;
929 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
930 prev_range_bi, *bi0);
931 if (IP4_REASS_RC_OK != rc)
939 discard_candidate = 1;
942 else if (fragment_last > candidate_vnb->ip.reass.range_last)
945 candidate_vnb->ip.reass.range_last - fragment_first + 1;
946 if (overlap < ip4_reass_buffer_get_data_len (candidate_b))
948 fvnb->ip.reass.range_first += overlap;
949 if (~0 != candidate_vnb->ip.reass.next_range_bi)
951 prev_range_bi = candidate_range_bi;
953 candidate_vnb->ip.reass.next_range_bi;
958 // special case - last range discarded
960 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
963 if (IP4_REASS_RC_OK != rc)
972 discard_candidate = 1;
977 discard_candidate = 1;
979 if (discard_candidate)
981 u32 next_range_bi = candidate_vnb->ip.reass.next_range_bi;
982 // discard candidate range, probe next range
984 ip4_reass_remove_range_from_chain (vm, node, rm, reass,
987 if (IP4_REASS_RC_OK != rc)
991 if (~0 != next_range_bi)
993 candidate_range_bi = next_range_bi;
998 // special case - last range discarded
1000 ip4_reass_insert_range_in_chain (vm, rm, rt, reass,
1001 prev_range_bi, *bi0);
1002 if (IP4_REASS_RC_OK != rc)
1012 ++reass->fragments_n;
1015 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
1017 ip4_reass_add_trace (vm, node, rm, reass->id,
1018 reass->trace_op_counter, *bi0, reass->first_bi,
1019 reass->data_len, RANGE_NEW, 0, ~0);
1020 ++reass->trace_op_counter;
1023 if (~0 != reass->last_packet_octet &&
1024 reass->data_len == reass->last_packet_octet + 1)
1026 *handoff_thread_idx = reass->sendout_thread_index;
1028 ip4_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0,
1030 if (IP4_REASS_RC_OK == rc
1031 && reass->memory_owner_thread_index != reass->sendout_thread_index)
1033 rc = IP4_REASS_RC_HANDOFF;
1041 if (reass->fragments_n > rm->max_reass_len)
1043 rc = IP4_REASS_RC_TOO_MANY_FRAGMENTS;
1048 *next0 = IP4_REASSEMBLY_NEXT_DROP;
1049 *error0 = IP4_ERROR_REASS_DUPLICATE_FRAGMENT;
1056 ip4_reassembly_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1057 vlib_frame_t * frame, bool is_feature,
1060 u32 *from = vlib_frame_vector_args (frame);
1061 u32 n_left_from, n_left_to_next, *to_next, next_index;
1062 ip4_reass_main_t *rm = &ip4_reass_main;
1063 ip4_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
1064 clib_spinlock_lock (&rt->lock);
1066 n_left_from = frame->n_vectors;
1067 next_index = node->cached_next_index;
1068 while (n_left_from > 0)
1070 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1072 while (n_left_from > 0 && n_left_to_next > 0)
1077 u32 error0 = IP4_ERROR_NONE;
1080 b0 = vlib_get_buffer (vm, bi0);
1082 ip4_header_t *ip0 = vlib_buffer_get_current (b0);
1083 if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0))
1085 // this is a whole packet - no fragmentation
1088 next0 = IP4_REASSEMBLY_NEXT_INPUT;
1092 next0 = vnet_buffer (b0)->ip.reass.next_index;
1097 const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
1098 const u32 fragment_length =
1099 clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0);
1100 const u32 fragment_last = fragment_first + fragment_length - 1;
1101 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
1103 next0 = IP4_REASSEMBLY_NEXT_DROP;
1104 error0 = IP4_ERROR_REASS_MALFORMED_PACKET;
1112 (u64) vec_elt (ip4_main.fib_index_by_sw_if_index,
1113 vnet_buffer (b0)->sw_if_index[VLIB_RX]) |
1114 (u64) ip0->src_address.as_u32 << 32;
1116 (u64) ip0->dst_address.as_u32 |
1117 (u64) ip0->fragment_id << 32 | (u64) ip0->protocol << 48;
1119 ip4_reass_t *reass =
1120 ip4_reass_find_or_create (vm, node, rm, rt, &kv,
1124 const u32 fragment_first =
1125 ip4_get_fragment_offset_bytes (ip0);
1126 if (0 == fragment_first)
1128 reass->sendout_thread_index = vm->thread_index;
1131 if (PREDICT_FALSE (do_handoff))
1133 next0 = IP4_REASSEMBLY_NEXT_HANDOFF;
1135 vnet_buffer (b0)->ip.
1136 reass.owner_feature_thread_index =
1137 kv.v.memory_owner_thread_index;
1139 vnet_buffer (b0)->ip.reass.owner_thread_index =
1140 kv.v.memory_owner_thread_index;
1144 u32 handoff_thread_idx;
1145 switch (ip4_reass_update
1146 (vm, node, rm, rt, reass, &bi0, &next0,
1147 &error0, is_custom_app, &handoff_thread_idx))
1149 case IP4_REASS_RC_OK:
1150 /* nothing to do here */
1152 case IP4_REASS_RC_HANDOFF:
1153 next0 = IP4_REASSEMBLY_NEXT_HANDOFF;
1154 b0 = vlib_get_buffer (vm, bi0);
1156 vnet_buffer (b0)->ip.
1157 reass.owner_feature_thread_index =
1160 vnet_buffer (b0)->ip.reass.owner_thread_index =
1163 case IP4_REASS_RC_TOO_MANY_FRAGMENTS:
1164 vlib_node_increment_counter (vm, node->node_index,
1165 IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
1167 ip4_reass_drop_all (vm, node, rm, reass);
1168 ip4_reass_free (vm, rm, rt, reass);
1171 case IP4_REASS_RC_NO_BUF:
1172 vlib_node_increment_counter (vm, node->node_index,
1173 IP4_ERROR_REASS_NO_BUF,
1175 ip4_reass_drop_all (vm, node, rm, reass);
1176 ip4_reass_free (vm, rm, rt, reass);
1179 case IP4_REASS_RC_INTERNAL_ERROR:
1180 /* drop everything and start with a clean slate */
1181 vlib_node_increment_counter (vm, node->node_index,
1182 IP4_ERROR_REASS_INTERNAL_ERROR,
1184 ip4_reass_drop_all (vm, node, rm, reass);
1185 ip4_reass_free (vm, rm, rt, reass);
1192 next0 = IP4_REASSEMBLY_NEXT_DROP;
1193 error0 = IP4_ERROR_REASS_LIMIT_REACHED;
1197 b0->error = node->errors[error0];
1204 n_left_to_next -= 1;
1205 if (next0 == IP4_REASSEMBLY_NEXT_HANDOFF)
1207 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1210 ip4_reass_add_trace (vm, node, rm, ~0,
1212 bi0, ~0, ~0, HANDOFF, 0,
1213 vnet_buffer (b0)->ip.
1214 reass.owner_feature_thread_index);
1216 ip4_reass_add_trace (vm, node, rm, ~0, ~0, 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_reassembly_error_strings[] = {
1246 #define _(sym, string) string,
1251 VLIB_NODE_FN (ip4_reass_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1252 vlib_frame_t * frame)
1254 return ip4_reassembly_inline (vm, node, frame, false /* is_feature */ ,
1255 false /* is_custom_app */ );
1259 VLIB_REGISTER_NODE (ip4_reass_node) = {
1260 .name = "ip4-reassembly",
1261 .vector_size = sizeof (u32),
1262 .format_trace = format_ip4_reass_trace,
1263 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1264 .error_strings = ip4_reassembly_error_strings,
1265 .n_next_nodes = IP4_REASSEMBLY_N_NEXT,
1268 [IP4_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1269 [IP4_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1270 [IP4_REASSEMBLY_NEXT_HANDOFF] = "ip4-reassembly-handoff",
1276 VLIB_NODE_FN (ip4_reass_node_feature) (vlib_main_t * vm,
1277 vlib_node_runtime_t * node,
1278 vlib_frame_t * frame)
1280 return ip4_reassembly_inline (vm, node, frame, true /* is_feature */ ,
1281 false /* is_custom_app */ );
1285 VLIB_REGISTER_NODE (ip4_reass_node_feature) = {
1286 .name = "ip4-reassembly-feature",
1287 .vector_size = sizeof (u32),
1288 .format_trace = format_ip4_reass_trace,
1289 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1290 .error_strings = ip4_reassembly_error_strings,
1291 .n_next_nodes = IP4_REASSEMBLY_N_NEXT,
1294 [IP4_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1295 [IP4_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1296 [IP4_REASSEMBLY_NEXT_HANDOFF] = "ip4-reass-feature-hoff",
1302 VNET_FEATURE_INIT (ip4_reassembly_feature, static) = {
1303 .arc_name = "ip4-unicast",
1304 .node_name = "ip4-reassembly-feature",
1305 .runs_before = VNET_FEATURES ("ip4-lookup",
1306 "ipsec4-input-feature"),
1311 #ifndef CLIB_MARCH_VARIANT
1313 ip4_reass_get_nbuckets ()
1315 ip4_reass_main_t *rm = &ip4_reass_main;
1319 nbuckets = (u32) (rm->max_reass_n / IP4_REASS_HT_LOAD_FACTOR);
1321 for (i = 0; i < 31; i++)
1322 if ((1 << i) >= nbuckets)
1328 #endif /* CLIB_MARCH_VARIANT */
1332 IP4_EVENT_CONFIG_CHANGED = 1,
1333 } ip4_reass_event_t;
1338 clib_bihash_16_8_t *new_hash;
1339 } ip4_rehash_cb_ctx;
1341 #ifndef CLIB_MARCH_VARIANT
1343 ip4_rehash_cb (clib_bihash_kv_16_8_t * kv, void *_ctx)
1345 ip4_rehash_cb_ctx *ctx = _ctx;
1346 if (clib_bihash_add_del_16_8 (ctx->new_hash, kv, 1))
1353 ip4_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
1354 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1356 ip4_reass_main.timeout_ms = timeout_ms;
1357 ip4_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
1358 ip4_reass_main.max_reass_n = max_reassemblies;
1359 ip4_reass_main.max_reass_len = max_reassembly_length;
1360 ip4_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
1364 ip4_reass_set (u32 timeout_ms, u32 max_reassemblies,
1365 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1367 u32 old_nbuckets = ip4_reass_get_nbuckets ();
1368 ip4_reass_set_params (timeout_ms, max_reassemblies, max_reassembly_length,
1369 expire_walk_interval_ms);
1370 vlib_process_signal_event (ip4_reass_main.vlib_main,
1371 ip4_reass_main.ip4_reass_expire_node_idx,
1372 IP4_EVENT_CONFIG_CHANGED, 0);
1373 u32 new_nbuckets = ip4_reass_get_nbuckets ();
1374 if (ip4_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
1376 clib_bihash_16_8_t new_hash;
1377 clib_memset (&new_hash, 0, sizeof (new_hash));
1378 ip4_rehash_cb_ctx ctx;
1380 ctx.new_hash = &new_hash;
1381 clib_bihash_init_16_8 (&new_hash, "ip4-reass", new_nbuckets,
1382 new_nbuckets * 1024);
1383 clib_bihash_foreach_key_value_pair_16_8 (&ip4_reass_main.hash,
1384 ip4_rehash_cb, &ctx);
1387 clib_bihash_free_16_8 (&new_hash);
1392 clib_bihash_free_16_8 (&ip4_reass_main.hash);
1393 clib_memcpy_fast (&ip4_reass_main.hash, &new_hash,
1394 sizeof (ip4_reass_main.hash));
1395 clib_bihash_copied (&ip4_reass_main.hash, &new_hash);
1402 ip4_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
1403 u32 * max_reassembly_length, u32 * expire_walk_interval_ms)
1405 *timeout_ms = ip4_reass_main.timeout_ms;
1406 *max_reassemblies = ip4_reass_main.max_reass_n;
1407 *max_reassembly_length = ip4_reass_main.max_reass_len;
1408 *expire_walk_interval_ms = ip4_reass_main.expire_walk_interval_ms;
1412 static clib_error_t *
1413 ip4_reass_init_function (vlib_main_t * vm)
1415 ip4_reass_main_t *rm = &ip4_reass_main;
1416 clib_error_t *error = 0;
1422 vec_validate (rm->per_thread_data, vlib_num_workers ());
1423 ip4_reass_per_thread_t *rt;
1424 vec_foreach (rt, rm->per_thread_data)
1426 clib_spinlock_init (&rt->lock);
1427 pool_alloc (rt->pool, rm->max_reass_n);
1430 node = vlib_get_node_by_name (vm, (u8 *) "ip4-reassembly-expire-walk");
1432 rm->ip4_reass_expire_node_idx = node->index;
1434 ip4_reass_set_params (IP4_REASS_TIMEOUT_DEFAULT_MS,
1435 IP4_REASS_MAX_REASSEMBLIES_DEFAULT,
1436 IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
1437 IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
1439 nbuckets = ip4_reass_get_nbuckets ();
1440 clib_bihash_init_16_8 (&rm->hash, "ip4-reass", nbuckets, nbuckets * 1024);
1442 node = vlib_get_node_by_name (vm, (u8 *) "ip4-drop");
1444 rm->ip4_drop_idx = node->index;
1446 rm->fq_index = vlib_frame_queue_main_init (ip4_reass_node.index, 0);
1447 rm->fq_feature_index =
1448 vlib_frame_queue_main_init (ip4_reass_node_feature.index, 0);
1453 VLIB_INIT_FUNCTION (ip4_reass_init_function);
1454 #endif /* CLIB_MARCH_VARIANT */
1457 ip4_reass_walk_expired (vlib_main_t * vm,
1458 vlib_node_runtime_t * node, vlib_frame_t * f)
1460 ip4_reass_main_t *rm = &ip4_reass_main;
1461 uword event_type, *event_data = 0;
1465 vlib_process_wait_for_event_or_clock (vm,
1467 rm->expire_walk_interval_ms /
1468 (f64) MSEC_PER_SEC);
1469 event_type = vlib_process_get_events (vm, &event_data);
1473 case ~0: /* no events => timeout */
1474 /* nothing to do here */
1476 case IP4_EVENT_CONFIG_CHANGED:
1479 clib_warning ("BUG: event type 0x%wx", event_type);
1482 f64 now = vlib_time_now (vm);
1485 int *pool_indexes_to_free = NULL;
1487 uword thread_index = 0;
1489 const uword nthreads = vlib_num_workers () + 1;
1490 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1492 ip4_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1493 clib_spinlock_lock (&rt->lock);
1495 vec_reset_length (pool_indexes_to_free);
1497 pool_foreach_index (index, rt->pool, ({
1498 reass = pool_elt_at_index (rt->pool, index);
1499 if (now > reass->last_heard + rm->timeout)
1501 vec_add1 (pool_indexes_to_free, index);
1507 vec_foreach (i, pool_indexes_to_free)
1509 ip4_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
1510 ip4_reass_drop_all (vm, node, rm, reass);
1511 ip4_reass_free (vm, rm, rt, reass);
1515 clib_spinlock_unlock (&rt->lock);
1518 vec_free (pool_indexes_to_free);
1521 _vec_len (event_data) = 0;
1529 VLIB_REGISTER_NODE (ip4_reass_expire_node, static) = {
1530 .function = ip4_reass_walk_expired,
1531 .type = VLIB_NODE_TYPE_PROCESS,
1532 .name = "ip4-reassembly-expire-walk",
1533 .format_trace = format_ip4_reass_trace,
1534 .n_errors = ARRAY_LEN (ip4_reassembly_error_strings),
1535 .error_strings = ip4_reassembly_error_strings,
1541 format_ip4_reass_key (u8 * s, va_list * args)
1543 ip4_reass_key_t *key = va_arg (*args, ip4_reass_key_t *);
1544 s = format (s, "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
1545 key->xx_id, format_ip4_address, &key->src, format_ip4_address,
1546 &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
1551 format_ip4_reass (u8 * s, va_list * args)
1553 vlib_main_t *vm = va_arg (*args, vlib_main_t *);
1554 ip4_reass_t *reass = va_arg (*args, ip4_reass_t *);
1556 s = format (s, "ID: %lu, key: %U\n first_bi: %u, data_len: %u, "
1557 "last_packet_octet: %u, trace_op_counter: %u\n",
1558 reass->id, format_ip4_reass_key, &reass->key, reass->first_bi,
1559 reass->data_len, reass->last_packet_octet,
1560 reass->trace_op_counter);
1561 u32 bi = reass->first_bi;
1565 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
1566 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
1567 s = format (s, " #%03u: range: [%u, %u], bi: %u, off: %d, len: %u, "
1568 "fragment[%u, %u]\n",
1569 counter, vnb->ip.reass.range_first,
1570 vnb->ip.reass.range_last, bi,
1571 ip4_reass_buffer_get_data_offset (b),
1572 ip4_reass_buffer_get_data_len (b),
1573 vnb->ip.reass.fragment_first, vnb->ip.reass.fragment_last);
1574 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
1576 bi = b->next_buffer;
1586 static clib_error_t *
1587 show_ip4_reass (vlib_main_t * vm,
1588 unformat_input_t * input,
1589 CLIB_UNUSED (vlib_cli_command_t * lmd))
1591 ip4_reass_main_t *rm = &ip4_reass_main;
1593 vlib_cli_output (vm, "---------------------");
1594 vlib_cli_output (vm, "IP4 reassembly status");
1595 vlib_cli_output (vm, "---------------------");
1596 bool details = false;
1597 if (unformat (input, "details"))
1602 u32 sum_reass_n = 0;
1605 const uword nthreads = vlib_num_workers () + 1;
1606 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1608 ip4_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1609 clib_spinlock_lock (&rt->lock);
1613 pool_foreach (reass, rt->pool, {
1614 vlib_cli_output (vm, "%U", format_ip4_reass, vm, reass);
1618 sum_reass_n += rt->reass_n;
1619 clib_spinlock_unlock (&rt->lock);
1621 vlib_cli_output (vm, "---------------------");
1622 vlib_cli_output (vm, "Current IP4 reassemblies count: %lu\n",
1623 (long unsigned) sum_reass_n);
1624 vlib_cli_output (vm,
1625 "Maximum configured concurrent IP4 reassemblies per worker-thread: %lu\n",
1626 (long unsigned) rm->max_reass_n);
1631 VLIB_CLI_COMMAND (show_ip4_reassembly_cmd, static) = {
1632 .path = "show ip4-reassembly",
1633 .short_help = "show ip4-reassembly [details]",
1634 .function = show_ip4_reass,
1638 #ifndef CLIB_MARCH_VARIANT
1640 ip4_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
1642 return vnet_feature_enable_disable ("ip4-unicast",
1643 "ip4-reassembly-feature", sw_if_index,
1644 enable_disable, 0, 0);
1646 #endif /* CLIB_MARCH_VARIANT */
1649 #define foreach_ip4_reassembly_handoff_error \
1650 _(CONGESTION_DROP, "congestion drop")
1655 #define _(sym,str) IP4_REASSEMBLY_HANDOFF_ERROR_##sym,
1656 foreach_ip4_reassembly_handoff_error
1658 IP4_REASSEMBLY_HANDOFF_N_ERROR,
1659 } ip4_reassembly_handoff_error_t;
1661 static char *ip4_reassembly_handoff_error_strings[] = {
1662 #define _(sym,string) string,
1663 foreach_ip4_reassembly_handoff_error
1669 u32 next_worker_index;
1670 } ip4_reassembly_handoff_trace_t;
1673 format_ip4_reassembly_handoff_trace (u8 * s, va_list * args)
1675 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1676 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1677 ip4_reassembly_handoff_trace_t *t =
1678 va_arg (*args, ip4_reassembly_handoff_trace_t *);
1681 format (s, "ip4-reassembly-handoff: next-worker %d",
1682 t->next_worker_index);
1688 ip4_reassembly_handoff_node_inline (vlib_main_t * vm,
1689 vlib_node_runtime_t * node,
1690 vlib_frame_t * frame, bool is_feature)
1692 ip4_reass_main_t *rm = &ip4_reass_main;
1694 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1695 u32 n_enq, n_left_from, *from;
1696 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
1699 from = vlib_frame_vector_args (frame);
1700 n_left_from = frame->n_vectors;
1701 vlib_get_buffers (vm, from, bufs, n_left_from);
1704 ti = thread_indices;
1706 fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
1708 while (n_left_from > 0)
1711 (is_feature) ? vnet_buffer (b[0])->ip.
1712 reass.owner_feature_thread_index : vnet_buffer (b[0])->ip.
1713 reass.owner_thread_index;
1716 ((node->flags & VLIB_NODE_FLAG_TRACE)
1717 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1719 ip4_reassembly_handoff_trace_t *t =
1720 vlib_add_trace (vm, node, b[0], sizeof (*t));
1721 t->next_worker_index = ti[0];
1729 vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
1730 frame->n_vectors, 1);
1732 if (n_enq < frame->n_vectors)
1733 vlib_node_increment_counter (vm, node->node_index,
1734 IP4_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
1735 frame->n_vectors - n_enq);
1736 return frame->n_vectors;
1739 VLIB_NODE_FN (ip4_reassembly_handoff_node) (vlib_main_t * vm,
1740 vlib_node_runtime_t * node,
1741 vlib_frame_t * frame)
1743 return ip4_reassembly_handoff_node_inline (vm, node, frame,
1744 false /* is_feature */ );
1749 VLIB_REGISTER_NODE (ip4_reassembly_handoff_node) = {
1750 .name = "ip4-reassembly-handoff",
1751 .vector_size = sizeof (u32),
1752 .n_errors = ARRAY_LEN(ip4_reassembly_handoff_error_strings),
1753 .error_strings = ip4_reassembly_handoff_error_strings,
1754 .format_trace = format_ip4_reassembly_handoff_trace,
1766 VLIB_NODE_FN (ip4_reassembly_feature_handoff_node) (vlib_main_t * vm,
1767 vlib_node_runtime_t *
1769 vlib_frame_t * frame)
1771 return ip4_reassembly_handoff_node_inline (vm, node, frame,
1772 true /* is_feature */ );
1778 VLIB_REGISTER_NODE (ip4_reassembly_feature_handoff_node) = {
1779 .name = "ip4-reass-feature-hoff",
1780 .vector_size = sizeof (u32),
1781 .n_errors = ARRAY_LEN(ip4_reassembly_handoff_error_strings),
1782 .error_strings = ip4_reassembly_handoff_error_strings,
1783 .format_trace = format_ip4_reassembly_handoff_trace,
1794 * fd.io coding-style-patch-verification: ON
1797 * eval: (c-set-style "gnu")