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 Shallow Virtual Reassembly.
20 * This file contains the source code for IPv6 Shallow Virtual reassembly.
23 #include <vppinfra/vec.h>
24 #include <vnet/vnet.h>
25 #include <vnet/ip/ip.h>
26 #include <vnet/ip/ip6_to_ip4.h>
27 #include <vppinfra/bihash_48_8.h>
28 #include <vnet/ip/reass/ip6_sv_reass.h>
30 #define MSEC_PER_SEC 1000
31 #define IP6_SV_REASS_TIMEOUT_DEFAULT_MS 100
32 #define IP6_SV_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
33 #define IP6_SV_REASS_MAX_REASSEMBLIES_DEFAULT 1024
34 #define IP6_SV_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
35 #define IP6_SV_REASS_HT_LOAD_FACTOR (0.75)
40 IP6_SV_REASS_RC_TOO_MANY_FRAGMENTS,
41 IP6_SV_REASS_RC_INTERNAL_ERROR,
42 IP6_SV_REASS_RC_UNSUPP_IP_PROTO,
79 clib_bihash_kv_48_8_t kv;
85 ip6_sv_reass_key_t key;
86 // time when last packet was received
88 // internal id of this reassembly
90 // trace operation counter
92 // buffer indexes of buffers in this reassembly in chronological order -
93 // including overlaps and duplicate fragments
95 // set to true when this reassembly is completed
110 ip6_sv_reass_t *pool;
113 clib_spinlock_t lock;
117 } ip6_sv_reass_per_thread_t;
124 u32 expire_walk_interval_ms;
125 // maximum number of fragments in one reassembly
127 // maximum number of reassemblies
131 clib_bihash_48_8_t hash;
134 ip6_sv_reass_per_thread_t *per_thread_data;
137 vlib_main_t *vlib_main;
138 vnet_main_t *vnet_main;
140 // node index of ip6-drop node
142 u32 ip6_icmp_error_idx;
143 u32 ip6_sv_reass_expire_node_idx;
145 /** Worker handoff */
147 u32 fq_feature_index;
149 // reference count for enabling/disabling feature - per interface
150 u32 *feature_use_refcount_per_intf;
151 } ip6_sv_reass_main_t;
153 extern ip6_sv_reass_main_t ip6_sv_reass_main;
155 #ifndef CLIB_MARCH_VARIANT
156 ip6_sv_reass_main_t ip6_sv_reass_main;
157 #endif /* CLIB_MARCH_VARIANT */
161 IP6_SV_REASSEMBLY_NEXT_INPUT,
162 IP6_SV_REASSEMBLY_NEXT_DROP,
163 IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR,
164 IP6_SV_REASSEMBLY_NEXT_HANDOFF,
165 IP6_SV_REASSEMBLY_N_NEXT,
166 } ip6_sv_reass_next_t;
170 REASS_FRAGMENT_CACHE,
172 REASS_FRAGMENT_FORWARD,
173 } ip6_sv_reass_trace_operation_e;
177 ip6_sv_reass_trace_operation_e action;
183 } ip6_sv_reass_trace_t;
186 format_ip6_sv_reass_trace (u8 * s, va_list * args)
188 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
189 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
190 ip6_sv_reass_trace_t *t = va_arg (*args, ip6_sv_reass_trace_t *);
191 s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
194 case REASS_FRAGMENT_CACHE:
195 s = format (s, "[cached]");
199 format (s, "[finish, ip proto=%u, src_port=%u, dst_port=%u]",
200 t->ip_proto, clib_net_to_host_u16 (t->l4_src_port),
201 clib_net_to_host_u16 (t->l4_dst_port));
203 case REASS_FRAGMENT_FORWARD:
205 format (s, "[forward, ip proto=%u, src_port=%u, dst_port=%u]",
206 t->ip_proto, clib_net_to_host_u16 (t->l4_src_port),
207 clib_net_to_host_u16 (t->l4_dst_port));
214 ip6_sv_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
215 ip6_sv_reass_main_t * rm,
216 ip6_sv_reass_t * reass, u32 bi,
217 ip6_sv_reass_trace_operation_e action,
218 u32 ip_proto, u16 l4_src_port, u16 l4_dst_port)
220 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
221 ip6_sv_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
222 t->reass_id = reass->id;
224 t->op_id = reass->trace_op_counter;
225 t->ip_proto = ip_proto;
226 t->l4_src_port = l4_src_port;
227 t->l4_dst_port = l4_dst_port;
228 ++reass->trace_op_counter;
231 s = format (s, "%U", format_ip6_sv_reass_trace, NULL, NULL, t);
232 printf ("%.*s\n", vec_len (s), s);
234 vec_reset_length (s);
239 ip6_sv_reass_free (vlib_main_t * vm, ip6_sv_reass_main_t * rm,
240 ip6_sv_reass_per_thread_t * rt, ip6_sv_reass_t * reass)
242 clib_bihash_kv_48_8_t kv;
243 kv.key[0] = reass->key.as_u64[0];
244 kv.key[1] = reass->key.as_u64[1];
245 kv.key[2] = reass->key.as_u64[2];
246 kv.key[3] = reass->key.as_u64[3];
247 kv.key[4] = reass->key.as_u64[4];
248 kv.key[5] = reass->key.as_u64[5];
249 clib_bihash_add_del_48_8 (&rm->hash, &kv, 0);
250 vlib_buffer_free (vm, reass->cached_buffers,
251 vec_len (reass->cached_buffers));
252 vec_free (reass->cached_buffers);
253 reass->cached_buffers = NULL;
254 if (~0 != reass->lru_prev)
256 ip6_sv_reass_t *lru_prev =
257 pool_elt_at_index (rt->pool, reass->lru_prev);
258 lru_prev->lru_next = reass->lru_next;
260 if (~0 != reass->lru_next)
262 ip6_sv_reass_t *lru_next =
263 pool_elt_at_index (rt->pool, reass->lru_next);
264 lru_next->lru_prev = reass->lru_prev;
266 if (rt->lru_first == reass - rt->pool)
268 rt->lru_first = reass->lru_next;
270 if (rt->lru_last == reass - rt->pool)
272 rt->lru_last = reass->lru_prev;
274 pool_put (rt->pool, reass);
279 ip6_sv_reass_init (ip6_sv_reass_t * reass)
281 reass->cached_buffers = NULL;
282 reass->is_complete = false;
285 always_inline ip6_sv_reass_t *
286 ip6_sv_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
287 ip6_sv_reass_main_t * rm,
288 ip6_sv_reass_per_thread_t * rt,
289 ip6_sv_reass_kv_t * kv, u32 * icmp_bi,
292 ip6_sv_reass_t *reass = NULL;
293 f64 now = vlib_time_now (rm->vlib_main);
295 if (!clib_bihash_search_48_8
296 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, (clib_bihash_kv_48_8_t *) kv))
298 if (vm->thread_index != kv->v.thread_index)
303 reass = pool_elt_at_index (rt->pool, kv->v.reass_index);
305 if (now > reass->last_heard + rm->timeout)
307 ip6_sv_reass_free (vm, rm, rt, reass);
314 reass->last_heard = now;
318 if (rt->reass_n >= rm->max_reass_n)
320 reass = pool_elt_at_index (rt->pool, rt->lru_last);
321 ip6_sv_reass_free (vm, rm, rt, reass);
324 pool_get (rt->pool, reass);
325 clib_memset (reass, 0, sizeof (*reass));
326 reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
328 ip6_sv_reass_init (reass);
331 reass->lru_prev = reass->lru_next = ~0;
333 if (~0 != rt->lru_last)
335 ip6_sv_reass_t *lru_last = pool_elt_at_index (rt->pool, rt->lru_last);
336 reass->lru_prev = rt->lru_last;
337 lru_last->lru_next = rt->lru_last = reass - rt->pool;
340 if (~0 == rt->lru_first)
342 rt->lru_first = rt->lru_last = reass - rt->pool;
345 reass->key.as_u64[0] = ((clib_bihash_kv_48_8_t *) kv)->key[0];
346 reass->key.as_u64[1] = ((clib_bihash_kv_48_8_t *) kv)->key[1];
347 reass->key.as_u64[2] = ((clib_bihash_kv_48_8_t *) kv)->key[2];
348 reass->key.as_u64[3] = ((clib_bihash_kv_48_8_t *) kv)->key[3];
349 reass->key.as_u64[4] = ((clib_bihash_kv_48_8_t *) kv)->key[4];
350 reass->key.as_u64[5] = ((clib_bihash_kv_48_8_t *) kv)->key[5];
351 kv->v.reass_index = (reass - rt->pool);
352 kv->v.thread_index = vm->thread_index;
353 reass->last_heard = now;
355 if (clib_bihash_add_del_48_8 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, 1))
357 ip6_sv_reass_free (vm, rm, rt, reass);
364 always_inline ip6_sv_reass_rc_t
365 ip6_sv_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
366 ip6_sv_reass_main_t * rm, ip6_sv_reass_per_thread_t * rt,
367 ip6_sv_reass_t * reass, u32 bi0,
368 ip6_frag_hdr_t * frag_hdr)
370 vlib_buffer_t *fb = vlib_get_buffer (vm, bi0);
371 vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
372 fvnb->ip.reass.ip6_frag_hdr_offset =
373 (u8 *) frag_hdr - (u8 *) vlib_buffer_get_current (fb);
374 ip6_header_t *fip = vlib_buffer_get_current (fb);
375 if (fb->current_length < sizeof (*fip) ||
376 fvnb->ip.reass.ip6_frag_hdr_offset == 0 ||
377 fvnb->ip.reass.ip6_frag_hdr_offset >= fb->current_length)
379 return IP6_SV_REASS_RC_INTERNAL_ERROR;
382 u32 fragment_first = fvnb->ip.reass.fragment_first =
383 ip6_frag_hdr_offset_bytes (frag_hdr);
384 u32 fragment_length =
385 vlib_buffer_length_in_chain (vm, fb) -
386 (fvnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
387 u32 fragment_last = fvnb->ip.reass.fragment_last =
388 fragment_first + fragment_length - 1;
389 fvnb->ip.reass.range_first = fragment_first;
390 fvnb->ip.reass.range_last = fragment_last;
391 fvnb->ip.reass.next_range_bi = ~0;
392 if (0 == fragment_first)
394 ip6_ext_header_t *ext_hdr = (void *) frag_hdr;
395 while (ip6_ext_hdr (ext_hdr->next_hdr)
396 && vlib_object_within_buffer_data (vm, fb, ext_hdr,
397 ext_hdr->n_data_u64s * 8))
399 ext_hdr = ip6_ext_next_header (ext_hdr);
401 reass->ip_proto = ext_hdr->next_hdr;
402 reass->l4_src_port = ip6_get_port (fip, 1, fb->current_length);
403 reass->l4_dst_port = ip6_get_port (fip, 0, fb->current_length);
404 if (!reass->l4_src_port || !reass->l4_dst_port)
405 return IP6_SV_REASS_RC_UNSUPP_IP_PROTO;
406 reass->is_complete = true;
407 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
408 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
410 ip6_sv_reass_add_trace (vm, node, rm, reass, bi0, REASS_FINISH,
411 reass->ip_proto, reass->l4_src_port,
415 vec_add1 (reass->cached_buffers, bi0);
416 if (!reass->is_complete)
418 if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
420 ip6_sv_reass_add_trace (vm, node, rm, reass, bi0,
421 REASS_FRAGMENT_CACHE, reass->ip_proto,
422 reass->l4_src_port, reass->l4_dst_port);
424 if (vec_len (reass->cached_buffers) > rm->max_reass_len)
426 return IP6_SV_REASS_RC_TOO_MANY_FRAGMENTS;
429 return IP6_SV_REASS_RC_OK;
433 ip6_sv_reass_verify_upper_layer_present (vlib_node_runtime_t * node,
435 ip6_frag_hdr_t * frag_hdr)
437 ip6_ext_header_t *tmp = (ip6_ext_header_t *) frag_hdr;
438 while (ip6_ext_hdr (tmp->next_hdr))
440 tmp = ip6_ext_next_header (tmp);
442 if (IP_PROTOCOL_IP6_NONXT == tmp->next_hdr)
444 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
445 ICMP6_parameter_problem_first_fragment_has_incomplete_header_chain,
447 b->error = node->errors[IP6_ERROR_REASS_MISSING_UPPER];
455 ip6_sv_reass_verify_fragment_multiple_8 (vlib_main_t * vm,
456 vlib_node_runtime_t * node,
458 ip6_frag_hdr_t * frag_hdr)
460 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
461 ip6_header_t *ip = vlib_buffer_get_current (b);
462 int more_fragments = ip6_frag_hdr_more (frag_hdr);
463 u32 fragment_length =
464 vlib_buffer_length_in_chain (vm, b) -
465 (vnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
466 if (more_fragments && 0 != fragment_length % 8)
468 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
469 ICMP6_parameter_problem_erroneous_header_field,
470 (u8 *) & ip->payload_length - (u8 *) ip);
477 ip6_sv_reass_verify_packet_size_lt_64k (vlib_main_t * vm,
478 vlib_node_runtime_t * node,
480 ip6_frag_hdr_t * frag_hdr)
482 vnet_buffer_opaque_t *vnb = vnet_buffer (b);
483 u32 fragment_first = ip6_frag_hdr_offset_bytes (frag_hdr);
484 u32 fragment_length =
485 vlib_buffer_length_in_chain (vm, b) -
486 (vnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
487 if (fragment_first + fragment_length > 65535)
489 ip6_header_t *ip0 = vlib_buffer_get_current (b);
490 icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
491 ICMP6_parameter_problem_erroneous_header_field,
492 (u8 *) & frag_hdr->fragment_offset_and_more
500 ip6_sv_reassembly_inline (vlib_main_t * vm,
501 vlib_node_runtime_t * node,
502 vlib_frame_t * frame, bool is_feature)
504 u32 *from = vlib_frame_vector_args (frame);
505 u32 n_left_from, n_left_to_next, *to_next, next_index;
506 ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
507 ip6_sv_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
508 clib_spinlock_lock (&rt->lock);
510 n_left_from = frame->n_vectors;
511 next_index = node->cached_next_index;
513 while (n_left_from > 0)
515 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
517 while (n_left_from > 0 && n_left_to_next > 0)
521 u32 next0 = IP6_SV_REASSEMBLY_NEXT_DROP;
522 u32 error0 = IP6_ERROR_NONE;
526 b0 = vlib_get_buffer (vm, bi0);
528 ip6_header_t *ip0 = vlib_buffer_get_current (b0);
529 ip6_frag_hdr_t *frag_hdr = NULL;
530 ip6_ext_header_t *prev_hdr;
531 if (ip6_ext_hdr (ip0->protocol))
534 ip6_ext_header_find (vm, b0, ip0,
535 IP_PROTOCOL_IPV6_FRAGMENTATION,
540 // this is a regular packet - no fragmentation
541 vnet_buffer (b0)->ip.reass.ip_proto = ip0->protocol;
542 vnet_buffer (b0)->ip.reass.l4_src_port =
543 ip6_get_port (ip0, 1, b0->current_length);
544 vnet_buffer (b0)->ip.reass.l4_dst_port =
545 ip6_get_port (ip0, 0, b0->current_length);
546 next0 = IP6_SV_REASSEMBLY_NEXT_INPUT;
549 vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset =
550 (u8 *) frag_hdr - (u8 *) ip0;
551 if (0 == ip6_frag_hdr_offset (frag_hdr))
553 // first fragment - verify upper-layer is present
554 if (!ip6_sv_reass_verify_upper_layer_present
555 (node, b0, frag_hdr))
557 next0 = IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR;
561 if (!ip6_sv_reass_verify_fragment_multiple_8
562 (vm, node, b0, frag_hdr)
563 || !ip6_sv_reass_verify_packet_size_lt_64k (vm, node, b0,
566 next0 = IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR;
570 ip6_sv_reass_kv_t kv;
573 kv.k.as_u64[0] = ip0->src_address.as_u64[0];
574 kv.k.as_u64[1] = ip0->src_address.as_u64[1];
575 kv.k.as_u64[2] = ip0->dst_address.as_u64[0];
576 kv.k.as_u64[3] = ip0->dst_address.as_u64[1];
578 ((u64) vec_elt (ip6_main.fib_index_by_sw_if_index,
579 vnet_buffer (b0)->sw_if_index[VLIB_RX])) << 32 |
580 (u64) frag_hdr->identification;
581 kv.k.as_u64[5] = ip0->protocol;
583 ip6_sv_reass_t *reass =
584 ip6_sv_reass_find_or_create (vm, node, rm, rt, &kv, &icmp_bi,
587 if (PREDICT_FALSE (do_handoff))
589 next0 = IP6_SV_REASSEMBLY_NEXT_HANDOFF;
590 vnet_buffer (b0)->ip.reass.owner_thread_index =
597 next0 = IP6_SV_REASSEMBLY_NEXT_DROP;
598 error0 = IP6_ERROR_REASS_LIMIT_REACHED;
602 if (reass->is_complete)
604 vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
605 vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
606 vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
607 next0 = IP6_SV_REASSEMBLY_NEXT_INPUT;
608 error0 = IP6_ERROR_NONE;
609 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
611 ip6_sv_reass_add_trace (vm, node, rm, reass, bi0,
612 REASS_FRAGMENT_FORWARD,
620 switch (ip6_sv_reass_update
621 (vm, node, rm, rt, reass, bi0, frag_hdr))
623 case IP6_SV_REASS_RC_OK:
624 /* nothing to do here */
626 case IP6_SV_REASS_RC_TOO_MANY_FRAGMENTS:
627 vlib_node_increment_counter (vm, node->node_index,
628 IP6_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
630 ip6_sv_reass_free (vm, rm, rt, reass);
633 case IP6_SV_REASS_RC_UNSUPP_IP_PROTO:
634 vlib_node_increment_counter (vm, node->node_index,
635 IP6_ERROR_REASS_UNSUPP_IP_PROTO,
637 ip6_sv_reass_free (vm, rm, rt, reass);
640 case IP6_SV_REASS_RC_INTERNAL_ERROR:
641 vlib_node_increment_counter (vm, node->node_index,
642 IP6_ERROR_REASS_INTERNAL_ERROR, 1);
643 ip6_sv_reass_free (vm, rm, rt, reass);
648 b0->error = node->errors[error0];
650 if (reass->is_complete)
653 vec_foreach_index (idx, reass->cached_buffers)
655 u32 bi0 = vec_elt (reass->cached_buffers, idx);
656 if (0 == n_left_to_next)
658 vlib_put_next_frame (vm, node, next_index,
660 vlib_get_next_frame (vm, node, next_index, to_next,
666 b0 = vlib_get_buffer (vm, bi0);
669 vnet_feature_next (&next0, b0);
671 vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
672 vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
673 vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
674 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
676 ip6_sv_reass_add_trace (vm, node, rm, reass, bi0,
677 REASS_FRAGMENT_FORWARD,
682 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
683 to_next, n_left_to_next, bi0,
686 _vec_len (reass->cached_buffers) = 0; // buffers are owned by frame now
694 if (is_feature && IP6_ERROR_NONE == error0)
696 b0 = vlib_get_buffer (vm, bi0);
697 vnet_feature_next (&next0, b0);
699 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
700 n_left_to_next, bi0, next0);
704 next0 = IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR;
705 to_next[0] = icmp_bi;
708 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
709 n_left_to_next, icmp_bi,
718 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
721 clib_spinlock_unlock (&rt->lock);
722 return frame->n_vectors;
725 static char *ip6_sv_reassembly_error_strings[] = {
726 #define _(sym, string) string,
731 VLIB_NODE_FN (ip6_sv_reass_node) (vlib_main_t * vm,
732 vlib_node_runtime_t * node,
733 vlib_frame_t * frame)
735 return ip6_sv_reassembly_inline (vm, node, frame, false /* is_feature */ );
739 VLIB_REGISTER_NODE (ip6_sv_reass_node) = {
740 .name = "ip6-sv-reassembly",
741 .vector_size = sizeof (u32),
742 .format_trace = format_ip6_sv_reass_trace,
743 .n_errors = ARRAY_LEN (ip6_sv_reassembly_error_strings),
744 .error_strings = ip6_sv_reassembly_error_strings,
745 .n_next_nodes = IP6_SV_REASSEMBLY_N_NEXT,
748 [IP6_SV_REASSEMBLY_NEXT_INPUT] = "ip6-input",
749 [IP6_SV_REASSEMBLY_NEXT_DROP] = "ip6-drop",
750 [IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
751 [IP6_SV_REASSEMBLY_NEXT_HANDOFF] = "ip6-sv-reassembly-handoff",
756 VLIB_NODE_FN (ip6_sv_reass_node_feature) (vlib_main_t * vm,
757 vlib_node_runtime_t * node,
758 vlib_frame_t * frame)
760 return ip6_sv_reassembly_inline (vm, node, frame, true /* is_feature */ );
764 VLIB_REGISTER_NODE (ip6_sv_reass_node_feature) = {
765 .name = "ip6-sv-reassembly-feature",
766 .vector_size = sizeof (u32),
767 .format_trace = format_ip6_sv_reass_trace,
768 .n_errors = ARRAY_LEN (ip6_sv_reassembly_error_strings),
769 .error_strings = ip6_sv_reassembly_error_strings,
770 .n_next_nodes = IP6_SV_REASSEMBLY_N_NEXT,
773 [IP6_SV_REASSEMBLY_NEXT_INPUT] = "ip6-input",
774 [IP6_SV_REASSEMBLY_NEXT_DROP] = "ip6-drop",
775 [IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
776 [IP6_SV_REASSEMBLY_NEXT_HANDOFF] = "ip6-sv-reass-feature-hoff",
782 VNET_FEATURE_INIT (ip6_sv_reassembly_feature) = {
783 .arc_name = "ip6-unicast",
784 .node_name = "ip6-sv-reassembly-feature",
785 .runs_before = VNET_FEATURES ("ip6-lookup"),
790 #ifndef CLIB_MARCH_VARIANT
792 ip6_sv_reass_get_nbuckets ()
794 ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
798 nbuckets = (u32) (rm->max_reass_n / IP6_SV_REASS_HT_LOAD_FACTOR);
800 for (i = 0; i < 31; i++)
801 if ((1 << i) >= nbuckets)
807 #endif /* CLIB_MARCH_VARIANT */
811 IP6_EVENT_CONFIG_CHANGED = 1,
812 } ip6_sv_reass_event_t;
814 #ifndef CLIB_MARCH_VARIANT
818 clib_bihash_48_8_t *new_hash;
822 ip6_rehash_cb (clib_bihash_kv_48_8_t * kv, void *_ctx)
824 ip6_rehash_cb_ctx *ctx = _ctx;
825 if (clib_bihash_add_del_48_8 (ctx->new_hash, kv, 1))
832 ip6_sv_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
833 u32 max_reassembly_length,
834 u32 expire_walk_interval_ms)
836 ip6_sv_reass_main.timeout_ms = timeout_ms;
837 ip6_sv_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
838 ip6_sv_reass_main.max_reass_n = max_reassemblies;
839 ip6_sv_reass_main.max_reass_len = max_reassembly_length;
840 ip6_sv_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
844 ip6_sv_reass_set (u32 timeout_ms, u32 max_reassemblies,
845 u32 max_reassembly_length, u32 expire_walk_interval_ms)
847 u32 old_nbuckets = ip6_sv_reass_get_nbuckets ();
848 ip6_sv_reass_set_params (timeout_ms, max_reassemblies,
849 max_reassembly_length, expire_walk_interval_ms);
850 vlib_process_signal_event (ip6_sv_reass_main.vlib_main,
851 ip6_sv_reass_main.ip6_sv_reass_expire_node_idx,
852 IP6_EVENT_CONFIG_CHANGED, 0);
853 u32 new_nbuckets = ip6_sv_reass_get_nbuckets ();
854 if (ip6_sv_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
856 clib_bihash_48_8_t new_hash;
857 clib_memset (&new_hash, 0, sizeof (new_hash));
858 ip6_rehash_cb_ctx ctx;
860 ctx.new_hash = &new_hash;
861 clib_bihash_init_48_8 (&new_hash, "ip6-sv-reass", new_nbuckets,
862 new_nbuckets * 1024);
863 clib_bihash_foreach_key_value_pair_48_8 (&ip6_sv_reass_main.hash,
864 ip6_rehash_cb, &ctx);
867 clib_bihash_free_48_8 (&new_hash);
872 clib_bihash_free_48_8 (&ip6_sv_reass_main.hash);
873 clib_memcpy_fast (&ip6_sv_reass_main.hash, &new_hash,
874 sizeof (ip6_sv_reass_main.hash));
875 clib_bihash_copied (&ip6_sv_reass_main.hash, &new_hash);
882 ip6_sv_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
883 u32 * max_reassembly_length, u32 * expire_walk_interval_ms)
885 *timeout_ms = ip6_sv_reass_main.timeout_ms;
886 *max_reassemblies = ip6_sv_reass_main.max_reass_n;
887 *max_reassembly_length = ip6_sv_reass_main.max_reass_len;
888 *expire_walk_interval_ms = ip6_sv_reass_main.expire_walk_interval_ms;
892 static clib_error_t *
893 ip6_sv_reass_init_function (vlib_main_t * vm)
895 ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
896 clib_error_t *error = 0;
901 rm->vnet_main = vnet_get_main ();
903 vec_validate (rm->per_thread_data, vlib_num_workers ());
904 ip6_sv_reass_per_thread_t *rt;
905 vec_foreach (rt, rm->per_thread_data)
907 clib_spinlock_init (&rt->lock);
908 pool_alloc (rt->pool, rm->max_reass_n);
909 rt->lru_first = rt->lru_last = ~0;
912 node = vlib_get_node_by_name (vm, (u8 *) "ip6-sv-reassembly-expire-walk");
914 rm->ip6_sv_reass_expire_node_idx = node->index;
916 ip6_sv_reass_set_params (IP6_SV_REASS_TIMEOUT_DEFAULT_MS,
917 IP6_SV_REASS_MAX_REASSEMBLIES_DEFAULT,
918 IP6_SV_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
919 IP6_SV_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
921 nbuckets = ip6_sv_reass_get_nbuckets ();
922 clib_bihash_init_48_8 (&rm->hash, "ip6-sv-reass", nbuckets,
925 node = vlib_get_node_by_name (vm, (u8 *) "ip6-drop");
927 rm->ip6_drop_idx = node->index;
928 node = vlib_get_node_by_name (vm, (u8 *) "ip6-icmp-error");
930 rm->ip6_icmp_error_idx = node->index;
932 if ((error = vlib_call_init_function (vm, ip_main_init)))
934 ip6_register_protocol (IP_PROTOCOL_IPV6_FRAGMENTATION,
935 ip6_sv_reass_node.index);
937 rm->fq_index = vlib_frame_queue_main_init (ip6_sv_reass_node.index, 0);
938 rm->fq_feature_index =
939 vlib_frame_queue_main_init (ip6_sv_reass_node_feature.index, 0);
941 rm->feature_use_refcount_per_intf = NULL;
946 VLIB_INIT_FUNCTION (ip6_sv_reass_init_function);
947 #endif /* CLIB_MARCH_VARIANT */
950 ip6_sv_reass_walk_expired (vlib_main_t * vm,
951 vlib_node_runtime_t * node, vlib_frame_t * f)
953 ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
954 uword event_type, *event_data = 0;
958 vlib_process_wait_for_event_or_clock (vm,
959 (f64) rm->expire_walk_interval_ms
960 / (f64) MSEC_PER_SEC);
961 event_type = vlib_process_get_events (vm, &event_data);
965 case ~0: /* no events => timeout */
966 /* nothing to do here */
968 case IP6_EVENT_CONFIG_CHANGED:
971 clib_warning ("BUG: event type 0x%wx", event_type);
974 f64 now = vlib_time_now (vm);
976 ip6_sv_reass_t *reass;
977 int *pool_indexes_to_free = NULL;
979 uword thread_index = 0;
981 const uword nthreads = vlib_num_workers () + 1;
982 for (thread_index = 0; thread_index < nthreads; ++thread_index)
984 ip6_sv_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
985 clib_spinlock_lock (&rt->lock);
987 vec_reset_length (pool_indexes_to_free);
989 pool_foreach_index (index, rt->pool, ({
990 reass = pool_elt_at_index (rt->pool, index);
991 if (now > reass->last_heard + rm->timeout)
993 vec_add1 (pool_indexes_to_free, index);
999 vec_foreach (i, pool_indexes_to_free)
1001 ip6_sv_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
1002 ip6_sv_reass_free (vm, rm, rt, reass);
1006 clib_spinlock_unlock (&rt->lock);
1009 vec_free (pool_indexes_to_free);
1012 _vec_len (event_data) = 0;
1020 VLIB_REGISTER_NODE (ip6_sv_reass_expire_node) = {
1021 .function = ip6_sv_reass_walk_expired,
1022 .format_trace = format_ip6_sv_reass_trace,
1023 .type = VLIB_NODE_TYPE_PROCESS,
1024 .name = "ip6-sv-reassembly-expire-walk",
1026 .n_errors = ARRAY_LEN (ip6_sv_reassembly_error_strings),
1027 .error_strings = ip6_sv_reassembly_error_strings,
1033 format_ip6_sv_reass_key (u8 * s, va_list * args)
1035 ip6_sv_reass_key_t *key = va_arg (*args, ip6_sv_reass_key_t *);
1036 s = format (s, "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
1037 key->xx_id, format_ip6_address, &key->src, format_ip6_address,
1038 &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
1043 format_ip6_sv_reass (u8 * s, va_list * args)
1045 vlib_main_t *vm = va_arg (*args, vlib_main_t *);
1046 ip6_sv_reass_t *reass = va_arg (*args, ip6_sv_reass_t *);
1048 s = format (s, "ID: %lu, key: %U, trace_op_counter: %u\n",
1049 reass->id, format_ip6_sv_reass_key, &reass->key,
1050 reass->trace_op_counter);
1054 vec_foreach (bip, reass->cached_buffers)
1059 b = vlib_get_buffer (vm, bi);
1060 s = format (s, " #%03u: bi: %u\n", counter, bi);
1062 bi = b->next_buffer;
1064 while (b->flags & VLIB_BUFFER_NEXT_PRESENT);
1069 static clib_error_t *
1070 show_ip6_sv_reass (vlib_main_t * vm, unformat_input_t * input,
1071 CLIB_UNUSED (vlib_cli_command_t * lmd))
1073 ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
1075 vlib_cli_output (vm, "---------------------");
1076 vlib_cli_output (vm, "IP6 reassembly status");
1077 vlib_cli_output (vm, "---------------------");
1078 bool details = false;
1079 if (unformat (input, "details"))
1084 u32 sum_reass_n = 0;
1085 u64 sum_buffers_n = 0;
1086 ip6_sv_reass_t *reass;
1088 const uword nthreads = vlib_num_workers () + 1;
1089 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1091 ip6_sv_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1092 clib_spinlock_lock (&rt->lock);
1096 pool_foreach (reass, rt->pool, {
1097 vlib_cli_output (vm, "%U", format_ip6_sv_reass, vm, reass);
1101 sum_reass_n += rt->reass_n;
1102 clib_spinlock_unlock (&rt->lock);
1104 vlib_cli_output (vm, "---------------------");
1105 vlib_cli_output (vm, "Current IP6 reassemblies count: %lu\n",
1106 (long unsigned) sum_reass_n);
1107 vlib_cli_output (vm, "Maximum configured concurrent IP6 reassemblies per "
1108 "worker-thread: %lu\n", (long unsigned) rm->max_reass_n);
1109 vlib_cli_output (vm, "Buffers in use: %lu\n",
1110 (long unsigned) sum_buffers_n);
1115 VLIB_CLI_COMMAND (show_ip6_sv_reassembly_cmd, static) = {
1116 .path = "show ip6-sv-reassembly",
1117 .short_help = "show ip6-sv-reassembly [details]",
1118 .function = show_ip6_sv_reass,
1122 #ifndef CLIB_MARCH_VARIANT
1124 ip6_sv_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
1126 return vnet_feature_enable_disable ("ip6-unicast",
1127 "ip6-sv-reassembly-feature",
1128 sw_if_index, enable_disable, 0, 0);
1130 #endif /* CLIB_MARCH_VARIANT */
1132 #define foreach_ip6_sv_reassembly_handoff_error \
1133 _(CONGESTION_DROP, "congestion drop")
1138 #define _(sym,str) IP6_SV_REASSEMBLY_HANDOFF_ERROR_##sym,
1139 foreach_ip6_sv_reassembly_handoff_error
1141 IP6_SV_REASSEMBLY_HANDOFF_N_ERROR,
1142 } ip6_sv_reassembly_handoff_error_t;
1144 static char *ip6_sv_reassembly_handoff_error_strings[] = {
1145 #define _(sym,string) string,
1146 foreach_ip6_sv_reassembly_handoff_error
1152 u32 next_worker_index;
1153 } ip6_sv_reassembly_handoff_trace_t;
1156 format_ip6_sv_reassembly_handoff_trace (u8 * s, va_list * args)
1158 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1159 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1160 ip6_sv_reassembly_handoff_trace_t *t =
1161 va_arg (*args, ip6_sv_reassembly_handoff_trace_t *);
1164 format (s, "ip6-sv-reassembly-handoff: next-worker %d",
1165 t->next_worker_index);
1171 ip6_sv_reassembly_handoff_inline (vlib_main_t * vm,
1172 vlib_node_runtime_t * node,
1173 vlib_frame_t * frame, bool is_feature)
1175 ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
1177 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1178 u32 n_enq, n_left_from, *from;
1179 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
1182 from = vlib_frame_vector_args (frame);
1183 n_left_from = frame->n_vectors;
1184 vlib_get_buffers (vm, from, bufs, n_left_from);
1187 ti = thread_indices;
1189 fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
1191 while (n_left_from > 0)
1193 ti[0] = vnet_buffer (b[0])->ip.reass.owner_thread_index;
1196 ((node->flags & VLIB_NODE_FLAG_TRACE)
1197 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1199 ip6_sv_reassembly_handoff_trace_t *t =
1200 vlib_add_trace (vm, node, b[0], sizeof (*t));
1201 t->next_worker_index = ti[0];
1209 vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
1210 frame->n_vectors, 1);
1212 if (n_enq < frame->n_vectors)
1213 vlib_node_increment_counter (vm, node->node_index,
1214 IP6_SV_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
1215 frame->n_vectors - n_enq);
1216 return frame->n_vectors;
1219 VLIB_NODE_FN (ip6_sv_reassembly_handoff_node) (vlib_main_t * vm,
1220 vlib_node_runtime_t * node,
1221 vlib_frame_t * frame)
1223 return ip6_sv_reassembly_handoff_inline (vm, node, frame,
1224 false /* is_feature */ );
1228 VLIB_REGISTER_NODE (ip6_sv_reassembly_handoff_node) = {
1229 .name = "ip6-sv-reassembly-handoff",
1230 .vector_size = sizeof (u32),
1231 .n_errors = ARRAY_LEN(ip6_sv_reassembly_handoff_error_strings),
1232 .error_strings = ip6_sv_reassembly_handoff_error_strings,
1233 .format_trace = format_ip6_sv_reassembly_handoff_trace,
1243 VLIB_NODE_FN (ip6_sv_reassembly_feature_handoff_node) (vlib_main_t * vm,
1244 vlib_node_runtime_t * node, vlib_frame_t * frame)
1246 return ip6_sv_reassembly_handoff_inline (vm, node, frame, true /* is_feature */ );
1251 VLIB_REGISTER_NODE (ip6_sv_reassembly_feature_handoff_node) = {
1252 .name = "ip6-sv-reass-feature-hoff",
1253 .vector_size = sizeof (u32),
1254 .n_errors = ARRAY_LEN(ip6_sv_reassembly_handoff_error_strings),
1255 .error_strings = ip6_sv_reassembly_handoff_error_strings,
1256 .format_trace = format_ip6_sv_reassembly_handoff_trace,
1266 #ifndef CLIB_MARCH_VARIANT
1268 ip6_sv_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable)
1270 ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
1271 vec_validate (rm->feature_use_refcount_per_intf, sw_if_index);
1274 if (!rm->feature_use_refcount_per_intf[sw_if_index])
1276 ++rm->feature_use_refcount_per_intf[sw_if_index];
1277 return vnet_feature_enable_disable ("ip6-unicast",
1278 "ip6-sv-reassembly-feature",
1279 sw_if_index, 1, 0, 0);
1281 ++rm->feature_use_refcount_per_intf[sw_if_index];
1285 --rm->feature_use_refcount_per_intf[sw_if_index];
1286 if (!rm->feature_use_refcount_per_intf[sw_if_index])
1287 return vnet_feature_enable_disable ("ip6-unicast",
1288 "ip6-sv-reassembly-feature",
1289 sw_if_index, 0, 0, 0);
1296 * fd.io coding-style-patch-verification: ON
1299 * eval: (c-set-style "gnu")