2 * Copyright (c) 2016 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.
16 #include <netinet/in.h>
18 #include <vlib/vlib.h>
19 #include <vnet/vnet.h>
20 #include <vnet/pg/pg.h>
21 #include <vppinfra/error.h>
23 #include "bihash_40_8.h"
25 #include <vppinfra/bihash_template.h>
26 #include <vppinfra/bihash_template.c>
34 u32 match_acl_in_index;
41 /* packet trace format function */
43 format_acl_fa_trace (u8 * s, va_list * args)
45 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
46 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
47 acl_fa_trace_t *t = va_arg (*args, acl_fa_trace_t *);
51 "acl-plugin: sw_if_index %d, next index %d, action: %d, match: acl %d rule %d trace_bits %08x\n"
52 " pkt info %016llx %016llx %016llx %016llx %016llx %016llx",
53 t->sw_if_index, t->next_index, t->action, t->match_acl_in_index,
54 t->match_rule_index, t->trace_bitmap,
55 t->packet_info[0], t->packet_info[1], t->packet_info[2],
56 t->packet_info[3], t->packet_info[4], t->packet_info[5]);
61 #define foreach_acl_fa_error \
62 _(ACL_DROP, "ACL deny packets") \
63 _(ACL_PERMIT, "ACL permit packets") \
64 _(ACL_NEW_SESSION, "new sessions added") \
65 _(ACL_EXIST_SESSION, "existing session packets") \
66 _(ACL_CHECK, "checked packets") \
67 _(ACL_RESTART_SESSION_TIMER, "restart session timer") \
68 _(ACL_TOO_MANY_SESSIONS, "too many sessions to add new") \
73 #define _(sym,str) ACL_FA_ERROR_##sym,
79 static char *acl_fa_error_strings[] = {
80 #define _(sym,string) string,
87 get_ptr_to_offset (vlib_buffer_t * b0, int offset)
89 u8 *p = vlib_buffer_get_current (b0) + offset;
95 fa_acl_match_addr (ip46_address_t * addr1, ip46_address_t * addr2,
96 int prefixlen, int is_ip6)
100 /* match any always succeeds */
105 if (memcmp (addr1, addr2, prefixlen / 8))
107 /* If the starting full bytes do not match, no point in bittwidling the thumbs further */
112 u8 b1 = *((u8 *) addr1 + 1 + prefixlen / 8);
113 u8 b2 = *((u8 *) addr2 + 1 + prefixlen / 8);
114 u8 mask0 = (0xff - ((1 << (8 - (prefixlen % 8))) - 1));
115 return (b1 & mask0) == b2;
119 /* The prefix fits into integer number of bytes, so nothing left to do */
125 uint32_t a1 = ntohl (addr1->ip4.as_u32);
126 uint32_t a2 = ntohl (addr2->ip4.as_u32);
127 uint32_t mask0 = 0xffffffff - ((1 << (32 - prefixlen)) - 1);
128 return (a1 & mask0) == a2;
133 fa_acl_match_port (u16 port, u16 port_first, u16 port_last, int is_ip6)
135 return ((port >= port_first) && (port <= port_last));
139 acl_match_5tuple (acl_main_t * am, u32 acl_index, fa_5tuple_t * pkt_5tuple,
140 int is_ip6, u8 * r_action, u32 * r_acl_match_p,
141 u32 * r_rule_match_p, u32 * trace_bitmap)
147 if (pool_is_free_index (am->acls, acl_index))
150 *r_acl_match_p = acl_index;
152 *r_rule_match_p = -1;
153 /* the ACL does not exist but is used for policy. Block traffic. */
156 a = am->acls + acl_index;
157 for (i = 0; i < a->count; i++)
160 if (is_ip6 != r->is_ipv6)
164 if (!fa_acl_match_addr
165 (&pkt_5tuple->addr[1], &r->dst, r->dst_prefixlen, is_ip6))
168 #ifdef FA_NODE_VERBOSE_DEBUG
170 ("ACL_FA_NODE_DBG acl %d rule %d pkt dst addr %U match rule addr %U/%d",
171 acl_index, i, format_ip46_address, &pkt_5tuple->addr[1],
172 IP46_TYPE_ANY, format_ip46_address, &r->dst, IP46_TYPE_ANY,
176 if (!fa_acl_match_addr
177 (&pkt_5tuple->addr[0], &r->src, r->src_prefixlen, is_ip6))
180 #ifdef FA_NODE_VERBOSE_DEBUG
182 ("ACL_FA_NODE_DBG acl %d rule %d pkt src addr %U match rule addr %U/%d",
183 acl_index, i, format_ip46_address, &pkt_5tuple->addr[0],
184 IP46_TYPE_ANY, format_ip46_address, &r->src, IP46_TYPE_ANY,
187 ("ACL_FA_NODE_DBG acl %d rule %d trying to match pkt proto %d with rule %d",
188 acl_index, i, pkt_5tuple->l4.proto, r->proto);
192 if (pkt_5tuple->l4.proto != r->proto)
195 if (PREDICT_FALSE (pkt_5tuple->pkt.is_nonfirst_fragment &&
196 am->l4_match_nonfirst_fragment))
198 /* non-initial fragment with frag match configured - match this rule */
199 *trace_bitmap |= 0x80000000;
200 *r_action = r->is_permit;
202 *r_acl_match_p = acl_index;
208 /* A sanity check just to ensure we are about to match the ports extracted from the packet */
209 if (PREDICT_FALSE (!pkt_5tuple->pkt.l4_valid))
212 #ifdef FA_NODE_VERBOSE_DEBUG
214 ("ACL_FA_NODE_DBG acl %d rule %d pkt proto %d match rule %d",
215 acl_index, i, pkt_5tuple->l4.proto, r->proto);
218 if (!fa_acl_match_port
219 (pkt_5tuple->l4.port[0], r->src_port_or_type_first,
220 r->src_port_or_type_last, is_ip6))
223 #ifdef FA_NODE_VERBOSE_DEBUG
225 ("ACL_FA_NODE_DBG acl %d rule %d pkt sport %d match rule [%d..%d]",
226 acl_index, i, pkt_5tuple->l4.port[0], r->src_port_or_type_first,
227 r->src_port_or_type_last);
230 if (!fa_acl_match_port
231 (pkt_5tuple->l4.port[1], r->dst_port_or_code_first,
232 r->dst_port_or_code_last, is_ip6))
235 #ifdef FA_NODE_VERBOSE_DEBUG
237 ("ACL_FA_NODE_DBG acl %d rule %d pkt dport %d match rule [%d..%d]",
238 acl_index, i, pkt_5tuple->l4.port[1], r->dst_port_or_code_first,
239 r->dst_port_or_code_last);
241 if (pkt_5tuple->pkt.tcp_flags_valid
242 && ((pkt_5tuple->pkt.tcp_flags & r->tcp_flags_mask) !=
246 /* everything matches! */
247 #ifdef FA_NODE_VERBOSE_DEBUG
248 clib_warning ("ACL_FA_NODE_DBG acl %d rule %d FULL-MATCH, action %d",
249 acl_index, i, r->is_permit);
251 *r_action = r->is_permit;
253 *r_acl_match_p = acl_index;
262 full_acl_match_5tuple (u32 sw_if_index, fa_5tuple_t * pkt_5tuple, int is_l2,
263 int is_ip6, int is_input, u32 * acl_match_p,
264 u32 * rule_match_p, u32 * trace_bitmap)
266 acl_main_t *am = &acl_main;
273 vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index);
274 acl_vector = am->input_acl_vec_by_sw_if_index[sw_if_index];
278 vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index);
279 acl_vector = am->output_acl_vec_by_sw_if_index[sw_if_index];
281 for (i = 0; i < vec_len (acl_vector); i++)
283 #ifdef FA_NODE_VERBOSE_DEBUG
284 clib_warning ("ACL_FA_NODE_DBG: Trying to match ACL: %d",
288 (am, acl_vector[i], pkt_5tuple, is_ip6, &action,
289 acl_match_p, rule_match_p, trace_bitmap))
294 if (vec_len (acl_vector) > 0)
296 /* If there are ACLs and none matched, deny by default */
299 #ifdef FA_NODE_VERBOSE_DEBUG
300 clib_warning ("ACL_FA_NODE_DBG: No ACL on sw_if_index %d", sw_if_index);
302 /* Deny by default. If there are no ACLs defined we should not be here. */
307 offset_within_packet (vlib_buffer_t * b0, int offset)
309 /* For the purposes of this code, "within" means we have at least 8 bytes after it */
310 return (offset <= (b0->current_length - 8));
314 acl_fill_5tuple (acl_main_t * am, vlib_buffer_t * b0, int is_ip6,
315 int is_input, int is_l2_path, fa_5tuple_t * p5tuple_pkt)
321 /* IP4 and IP6 protocol numbers of ICMP */
322 static u8 icmp_protos[] = { IP_PROTOCOL_ICMP, IP_PROTOCOL_ICMP6 };
324 if (is_input && !(is_l2_path))
329 /* key[0..3] contains src/dst address and is cleared/set below */
330 /* Remainder of the key and per-packet non-key data */
331 p5tuple_pkt->kv.key[4] = 0;
332 p5tuple_pkt->kv.value = 0;
336 clib_memcpy (&p5tuple_pkt->addr,
337 get_ptr_to_offset (b0,
338 offsetof (ip6_header_t,
339 src_address) + l3_offset),
340 sizeof (p5tuple_pkt->addr));
342 *(u8 *) get_ptr_to_offset (b0,
343 offsetof (ip6_header_t,
344 protocol) + l3_offset);
345 l4_offset = l3_offset + sizeof (ip6_header_t);
346 #ifdef FA_NODE_VERBOSE_DEBUG
347 clib_warning ("ACL_FA_NODE_DBG: proto: %d, l4_offset: %d", proto,
350 /* IP6 EH handling is here, increment l4_offset if needs to, update the proto */
351 int need_skip_eh = clib_bitmap_get (am->fa_ipv6_known_eh_bitmap, proto);
352 if (PREDICT_FALSE (need_skip_eh))
354 while (need_skip_eh && offset_within_packet (b0, l4_offset))
356 /* Fragment header needs special handling */
357 if (PREDICT_FALSE(ACL_EH_FRAGMENT == proto))
359 proto = *(u8 *) get_ptr_to_offset (b0, l4_offset);
361 clib_memcpy (&frag_offset, get_ptr_to_offset (b0, 2 + l4_offset), sizeof(frag_offset));
362 frag_offset = ntohs(frag_offset) >> 3;
365 p5tuple_pkt->pkt.is_nonfirst_fragment = 1;
366 /* invalidate L4 offset so we don't try to find L4 info */
367 l4_offset += b0->current_length;
371 /* First fragment: skip the frag header and move on. */
377 u8 nwords = *(u8 *) get_ptr_to_offset (b0, 1 + l4_offset);
378 proto = *(u8 *) get_ptr_to_offset (b0, l4_offset);
379 l4_offset += 8 * (1 + (u16) nwords);
381 #ifdef FA_NODE_VERBOSE_DEBUG
382 clib_warning ("ACL_FA_NODE_DBG: new proto: %d, new offset: %d",
386 clib_bitmap_get (am->fa_ipv6_known_eh_bitmap, proto);
392 p5tuple_pkt->kv.key[0] = 0;
393 p5tuple_pkt->kv.key[1] = 0;
394 p5tuple_pkt->kv.key[2] = 0;
395 p5tuple_pkt->kv.key[3] = 0;
396 clib_memcpy (&p5tuple_pkt->addr[0].ip4,
397 get_ptr_to_offset (b0,
398 offsetof (ip4_header_t,
399 src_address) + l3_offset),
400 sizeof (p5tuple_pkt->addr[0].ip4));
401 clib_memcpy (&p5tuple_pkt->addr[1].ip4,
402 get_ptr_to_offset (b0,
403 offsetof (ip4_header_t,
404 dst_address) + l3_offset),
405 sizeof (p5tuple_pkt->addr[1].ip4));
407 *(u8 *) get_ptr_to_offset (b0,
408 offsetof (ip4_header_t,
409 protocol) + l3_offset);
410 l4_offset = l3_offset + sizeof (ip4_header_t);
411 u16 flags_and_fragment_offset;
412 clib_memcpy (&flags_and_fragment_offset,
413 get_ptr_to_offset (b0,
414 offsetof (ip4_header_t,
415 flags_and_fragment_offset)) + l3_offset,
416 sizeof(flags_and_fragment_offset));
417 flags_and_fragment_offset = ntohs (flags_and_fragment_offset);
419 /* non-initial fragments have non-zero offset */
420 if ((PREDICT_FALSE(0xfff & flags_and_fragment_offset)))
422 p5tuple_pkt->pkt.is_nonfirst_fragment = 1;
423 /* invalidate L4 offset so we don't try to find L4 info */
424 l4_offset += b0->current_length;
428 p5tuple_pkt->l4.proto = proto;
429 if (PREDICT_TRUE (offset_within_packet (b0, l4_offset)))
431 p5tuple_pkt->pkt.l4_valid = 1;
432 if (icmp_protos[is_ip6] == proto)
435 p5tuple_pkt->l4.port[0] =
436 *(u8 *) get_ptr_to_offset (b0,
437 l4_offset + offsetof (icmp46_header_t,
440 p5tuple_pkt->l4.port[1] =
441 *(u8 *) get_ptr_to_offset (b0,
442 l4_offset + offsetof (icmp46_header_t,
445 else if ((IPPROTO_TCP == proto) || (IPPROTO_UDP == proto))
448 get_ptr_to_offset (b0,
449 l4_offset + offsetof (tcp_header_t,
452 p5tuple_pkt->l4.port[0] = ntohs (ports[0]);
453 p5tuple_pkt->l4.port[1] = ntohs (ports[1]);
455 p5tuple_pkt->pkt.tcp_flags =
456 *(u8 *) get_ptr_to_offset (b0,
457 l4_offset + offsetof (tcp_header_t,
459 p5tuple_pkt->pkt.tcp_flags_valid = (proto == IPPROTO_TCP);
462 * FIXME: rather than the above conditional, here could
463 * be a nice generic mechanism to extract two L4 values:
465 * have a per-protocol array of 4 elements like this:
466 * u8 offset; to take the byte from, off L4 header
467 * u8 mask; to mask it with, before storing
469 * this way we can describe UDP, TCP and ICMP[46] semantics,
470 * and add a sort of FPM-type behavior for other protocols.
472 * Of course, is it faster ? and is it needed ?
479 /* Session keys match the packets received, and mirror the packets sent */
481 acl_make_5tuple_session_key (int is_input, fa_5tuple_t * p5tuple_pkt,
482 fa_5tuple_t * p5tuple_sess)
484 int src_index = is_input ? 0 : 1;
485 int dst_index = is_input ? 1 : 0;
486 p5tuple_sess->addr[src_index] = p5tuple_pkt->addr[0];
487 p5tuple_sess->addr[dst_index] = p5tuple_pkt->addr[1];
488 p5tuple_sess->l4.as_u64 = p5tuple_pkt->l4.as_u64;
489 p5tuple_sess->l4.port[src_index] = p5tuple_pkt->l4.port[0];
490 p5tuple_sess->l4.port[dst_index] = p5tuple_pkt->l4.port[1];
495 acl_fa_ifc_has_sessions (acl_main_t * am, int sw_if_index0)
498 clib_bitmap_get (am->fa_sessions_on_sw_if_index, sw_if_index0);
503 acl_fa_ifc_has_in_acl (acl_main_t * am, int sw_if_index0)
505 int it_has = clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index0);
510 acl_fa_ifc_has_out_acl (acl_main_t * am, int sw_if_index0)
512 int it_has = clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index0);
518 fa_session_get_timeout_type (acl_main_t * am, fa_session_t * sess)
520 /* seen both SYNs and ACKs but not FINs means we are in establshed state */
522 sess->tcp_flags_seen.as_u16 & ((TCP_FLAGS_RSTFINACKSYN << 8) +
523 TCP_FLAGS_RSTFINACKSYN);
524 switch (sess->info.l4.proto)
527 if (((TCP_FLAGS_ACKSYN << 8) + TCP_FLAGS_ACKSYN) == masked_flags)
529 return ACL_TIMEOUT_TCP_IDLE;
533 return ACL_TIMEOUT_TCP_TRANSIENT;
537 return ACL_TIMEOUT_UDP_IDLE;
540 return ACL_TIMEOUT_UDP_IDLE;
546 fa_session_get_timeout (acl_main_t * am, fa_session_t * sess)
548 u64 timeout = am->vlib_main->clib_time.clocks_per_second;
549 int timeout_type = fa_session_get_timeout_type (am, sess);
550 timeout *= am->session_timeout_sec[timeout_type];
555 acl_fa_ifc_init_sessions (acl_main_t * am, int sw_if_index0)
557 #ifdef FA_NODE_VERBOSE_DEBUG
559 ("Initializing bihash for sw_if_index %d num buckets %lu memory size %llu",
560 sw_if_index0, am->fa_conn_table_hash_num_buckets,
561 am->fa_conn_table_hash_memory_size);
563 vec_validate (am->fa_sessions_by_sw_if_index, sw_if_index0);
564 BV (clib_bihash_init) (&am->fa_sessions_by_sw_if_index
565 [sw_if_index0], "ACL plugin FA session bihash",
566 am->fa_conn_table_hash_num_buckets,
567 am->fa_conn_table_hash_memory_size);
568 am->fa_sessions_on_sw_if_index =
569 clib_bitmap_set (am->fa_sessions_on_sw_if_index, sw_if_index0, 1);
573 acl_fa_conn_list_add_session (acl_main_t * am, u32 sess_id, u64 now)
575 fa_session_t *sess = am->fa_sessions_pool + sess_id;
576 u8 list_id = fa_session_get_timeout_type(am, sess);
577 sess->link_enqueue_time = now;
578 sess->link_list_id = list_id;
579 sess->link_next_idx = ~0;
580 sess->link_prev_idx = am->fa_conn_list_tail[list_id];
581 if (~0 != am->fa_conn_list_tail[list_id]) {
582 fa_session_t *prev_sess = am->fa_sessions_pool + am->fa_conn_list_tail[list_id];
583 prev_sess->link_next_idx = sess_id;
585 am->fa_conn_list_tail[list_id] = sess_id;
587 if (~0 == am->fa_conn_list_head[list_id]) {
588 am->fa_conn_list_head[list_id] = sess_id;
589 /* If it is a first conn in any list, kick off the cleaner */
590 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
591 ACL_FA_CLEANER_RESCHEDULE, 0);
597 acl_fa_conn_list_delete_session (acl_main_t *am, u32 sess_id)
599 fa_session_t *sess = am->fa_sessions_pool + sess_id;
600 if (~0 != sess->link_prev_idx) {
601 fa_session_t *prev_sess = am->fa_sessions_pool + sess->link_prev_idx;
602 prev_sess->link_next_idx = sess->link_next_idx;
603 if (prev_sess->link_list_id != sess->link_list_id)
604 clib_warning("(prev_sess->link_list_id != sess->link_list_id)");
606 if (~0 != sess->link_next_idx) {
607 fa_session_t *next_sess = am->fa_sessions_pool + sess->link_next_idx;
608 next_sess->link_prev_idx = sess->link_prev_idx;
609 if (next_sess->link_list_id != sess->link_list_id)
610 clib_warning("(next_sess->link_list_id != sess->link_list_id)");
612 if (am->fa_conn_list_head[sess->link_list_id] == sess_id) {
613 am->fa_conn_list_head[sess->link_list_id] = sess->link_next_idx;
615 if (am->fa_conn_list_tail[sess->link_list_id] == sess_id) {
616 am->fa_conn_list_tail[sess->link_list_id] = sess->link_prev_idx;
622 acl_fa_session_is_dead (acl_main_t * am, u32 sw_if_index, u64 now,
629 acl_fa_restart_timer_for_session (acl_main_t * am, u64 now, u32 sess_id)
631 // fa_session_t *sess = am->fa_sessions_pool + sess_id;
632 acl_fa_conn_list_delete_session(am, sess_id);
633 acl_fa_conn_list_add_session(am, sess_id, now);
638 acl_fa_track_session (acl_main_t * am, int is_input, u32 sw_if_index, u64 now,
639 fa_session_t * sess, fa_5tuple_t * pkt_5tuple)
641 sess->last_active_time = now;
642 if (pkt_5tuple->pkt.tcp_flags_valid)
644 sess->tcp_flags_seen.as_u8[is_input] |= pkt_5tuple->pkt.tcp_flags;
651 acl_fa_delete_session (acl_main_t * am, u32 sw_if_index, u32 sess_id)
653 fa_session_t *sess = (fa_session_t *) am->fa_sessions_pool + sess_id;
654 BV (clib_bihash_add_del) (&am->fa_sessions_by_sw_if_index[sw_if_index],
656 pool_put_index (am->fa_sessions_pool, sess_id);
657 /* Deleting from timer wheel not needed, as the cleaner deals with the timers. */
658 vec_validate (am->fa_session_dels_by_sw_if_index, sw_if_index);
659 am->fa_session_dels_by_sw_if_index[sw_if_index]++;
663 acl_fa_can_add_session (acl_main_t * am, int is_input, u32 sw_if_index)
666 vec_validate (am->fa_session_adds_by_sw_if_index, sw_if_index);
667 vec_validate (am->fa_session_dels_by_sw_if_index, sw_if_index);
669 am->fa_session_adds_by_sw_if_index[sw_if_index] -
670 am->fa_session_dels_by_sw_if_index[sw_if_index];
671 return (curr_sess < am->fa_conn_table_max_entries);
675 acl_fa_try_recycle_session (acl_main_t * am, int is_input, u32 sw_if_index)
677 /* try to recycle a TCP transient session */
678 u8 timeout_type = ACL_TIMEOUT_TCP_TRANSIENT;
679 u32 sess_id = am->fa_conn_list_head[timeout_type];
681 acl_fa_conn_list_delete_session(am, sess_id);
682 acl_fa_delete_session(am, sw_if_index, sess_id);
687 acl_fa_add_session (acl_main_t * am, int is_input, u32 sw_if_index, u64 now,
688 fa_5tuple_t * p5tuple)
690 clib_bihash_kv_40_8_t *pkv = &p5tuple->kv;
691 clib_bihash_kv_40_8_t kv;
695 pool_get (am->fa_sessions_pool, sess);
696 sess_id = sess - am->fa_sessions_pool;
699 kv.key[0] = pkv->key[0];
700 kv.key[1] = pkv->key[1];
701 kv.key[2] = pkv->key[2];
702 kv.key[3] = pkv->key[3];
703 kv.key[4] = pkv->key[4];
706 memcpy (sess, pkv, sizeof (pkv->key));
707 sess->last_active_time = now;
708 sess->sw_if_index = sw_if_index;
709 sess->tcp_flags_seen.as_u16 = 0;
711 sess->link_list_id = ~0;
712 sess->link_prev_idx = ~0;
713 sess->link_next_idx = ~0;
717 if (!acl_fa_ifc_has_sessions (am, sw_if_index))
719 acl_fa_ifc_init_sessions (am, sw_if_index);
722 BV (clib_bihash_add_del) (&am->fa_sessions_by_sw_if_index[sw_if_index],
724 acl_fa_conn_list_add_session(am, sess_id, now);
726 vec_validate (am->fa_session_adds_by_sw_if_index, sw_if_index);
727 am->fa_session_adds_by_sw_if_index[sw_if_index]++;
731 acl_fa_find_session (acl_main_t * am, u32 sw_if_index0, fa_5tuple_t * p5tuple,
732 clib_bihash_kv_40_8_t * pvalue_sess)
734 return (BV (clib_bihash_search)
735 (&am->fa_sessions_by_sw_if_index[sw_if_index0], &p5tuple->kv,
741 acl_fa_node_fn (vlib_main_t * vm,
742 vlib_node_runtime_t * node, vlib_frame_t * frame, int is_ip6,
743 int is_input, int is_l2_path, u32 * l2_feat_next_node_index,
744 vlib_node_registration_t * acl_fa_node)
746 u32 n_left_from, *from, *to_next;
747 acl_fa_next_t next_index;
748 u32 pkts_acl_checked = 0;
749 u32 pkts_new_session = 0;
750 u32 pkts_exist_session = 0;
751 u32 pkts_acl_permit = 0;
752 u32 pkts_restart_session_timer = 0;
753 u32 trace_bitmap = 0;
755 acl_main_t *am = &acl_main;
756 fa_5tuple_t fa_5tuple, kv_sess;
757 clib_bihash_kv_40_8_t value_sess;
758 vlib_node_runtime_t *error_node;
759 u64 now = clib_cpu_time_now ();
761 from = vlib_frame_vector_args (frame);
762 n_left_from = frame->n_vectors;
763 next_index = node->cached_next_index;
765 error_node = vlib_node_get_runtime (vm, acl_fa_node->index);
767 while (n_left_from > 0)
771 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
773 while (n_left_from > 0 && n_left_to_next > 0)
780 int acl_check_needed = 1;
781 u32 match_acl_in_index = ~0;
782 u32 match_rule_index = ~0;
785 /* speculatively enqueue b0 to the current next frame */
793 b0 = vlib_get_buffer (vm, bi0);
796 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
798 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
800 feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap;
803 * Extract the L3/L4 matching info into a 5-tuple structure,
804 * then create a session key whose layout is independent on forward or reverse
805 * direction of the packet.
808 acl_fill_5tuple (am, b0, is_ip6, is_input, is_l2_path, &fa_5tuple);
809 acl_make_5tuple_session_key (is_input, &fa_5tuple, &kv_sess);
810 #ifdef FA_NODE_VERBOSE_DEBUG
812 ("ACL_FA_NODE_DBG: session 5-tuple %016llx %016llx %016llx %016llx %016llx : %016llx",
813 kv_sess.kv.key[0], kv_sess.kv.key[1], kv_sess.kv.key[2],
814 kv_sess.kv.key[3], kv_sess.kv.key[4], kv_sess.kv.value);
816 ("ACL_FA_NODE_DBG: packet 5-tuple %016llx %016llx %016llx %016llx %016llx : %016llx",
817 fa_5tuple.kv.key[0], fa_5tuple.kv.key[1], fa_5tuple.kv.key[2],
818 fa_5tuple.kv.key[3], fa_5tuple.kv.key[4], fa_5tuple.kv.value);
821 /* Try to match an existing session first */
823 if (acl_fa_ifc_has_sessions (am, sw_if_index0))
825 if (acl_fa_find_session
826 (am, sw_if_index0, &kv_sess, &value_sess))
828 trace_bitmap |= 0x80000000;
829 error0 = ACL_FA_ERROR_ACL_EXIST_SESSION;
830 // FIXME assert(value_sess.value == (0xffffffff & value_sess.value));
831 u32 sess_id = value_sess.value;
832 fa_session_t *sess = am->fa_sessions_pool + sess_id;
833 int old_timeout_type =
834 fa_session_get_timeout_type (am, sess);
836 acl_fa_track_session (am, is_input, sw_if_index0, now,
838 /* expose the session id to the tracer */
839 match_rule_index = sess_id;
840 int new_timeout_type =
841 fa_session_get_timeout_type (am, sess);
842 acl_check_needed = 0;
843 pkts_exist_session += 1;
844 /* Tracking might have changed the session timeout type, e.g. from transient to established */
845 if (PREDICT_FALSE (old_timeout_type != new_timeout_type))
847 acl_fa_restart_timer_for_session (am, now, sess_id);
848 pkts_restart_session_timer++;
850 0x00010000 + ((0xff & old_timeout_type) << 8) +
851 (0xff & new_timeout_type);
856 if (acl_check_needed)
859 full_acl_match_5tuple (sw_if_index0, &fa_5tuple, is_l2_path,
860 is_ip6, is_input, &match_acl_in_index,
861 &match_rule_index, &trace_bitmap);
864 pkts_acl_permit += 1;
867 if (!acl_fa_can_add_session (am, is_input, sw_if_index0))
868 acl_fa_try_recycle_session (am, is_input, sw_if_index0);
870 if (acl_fa_can_add_session (am, is_input, sw_if_index0))
872 acl_fa_add_session (am, is_input, sw_if_index0, now,
874 pkts_new_session += 1;
879 error0 = ACL_FA_ERROR_ACL_TOO_MANY_SESSIONS;
890 feat_bitmap_get_next_node_index (l2_feat_next_node_index,
893 vnet_feature_next (sw_if_index0, &next0, b0);
896 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
897 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
899 acl_fa_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
900 t->sw_if_index = sw_if_index0;
901 t->next_index = next0;
902 t->match_acl_in_index = match_acl_in_index;
903 t->match_rule_index = match_rule_index;
904 t->packet_info[0] = fa_5tuple.kv.key[0];
905 t->packet_info[1] = fa_5tuple.kv.key[1];
906 t->packet_info[2] = fa_5tuple.kv.key[2];
907 t->packet_info[3] = fa_5tuple.kv.key[3];
908 t->packet_info[4] = fa_5tuple.kv.key[4];
909 t->packet_info[5] = fa_5tuple.kv.value;
911 t->trace_bitmap = trace_bitmap;
914 next0 = next0 < node->n_next_nodes ? next0 : 0;
916 b0->error = error_node->errors[error0];
918 pkts_acl_checked += 1;
920 /* verify speculative enqueue, maybe switch current next frame */
921 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
922 to_next, n_left_to_next, bi0,
926 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
929 vlib_node_increment_counter (vm, acl_fa_node->index,
930 ACL_FA_ERROR_ACL_CHECK, pkts_acl_checked);
931 vlib_node_increment_counter (vm, acl_fa_node->index,
932 ACL_FA_ERROR_ACL_PERMIT, pkts_acl_permit);
933 vlib_node_increment_counter (vm, acl_fa_node->index,
934 ACL_FA_ERROR_ACL_NEW_SESSION,
936 vlib_node_increment_counter (vm, acl_fa_node->index,
937 ACL_FA_ERROR_ACL_EXIST_SESSION,
939 vlib_node_increment_counter (vm, acl_fa_node->index,
940 ACL_FA_ERROR_ACL_RESTART_SESSION_TIMER,
941 pkts_restart_session_timer);
942 return frame->n_vectors;
946 vlib_node_registration_t acl_in_l2_ip6_node;
948 acl_in_ip6_l2_node_fn (vlib_main_t * vm,
949 vlib_node_runtime_t * node, vlib_frame_t * frame)
951 acl_main_t *am = &acl_main;
952 return acl_fa_node_fn (vm, node, frame, 1, 1, 1,
953 am->fa_acl_in_ip6_l2_node_feat_next_node_index,
954 &acl_in_l2_ip6_node);
957 vlib_node_registration_t acl_in_l2_ip4_node;
959 acl_in_ip4_l2_node_fn (vlib_main_t * vm,
960 vlib_node_runtime_t * node, vlib_frame_t * frame)
962 acl_main_t *am = &acl_main;
963 return acl_fa_node_fn (vm, node, frame, 0, 1, 1,
964 am->fa_acl_in_ip4_l2_node_feat_next_node_index,
965 &acl_in_l2_ip4_node);
968 vlib_node_registration_t acl_out_l2_ip6_node;
970 acl_out_ip6_l2_node_fn (vlib_main_t * vm,
971 vlib_node_runtime_t * node, vlib_frame_t * frame)
973 acl_main_t *am = &acl_main;
974 return acl_fa_node_fn (vm, node, frame, 1, 0, 1,
975 am->fa_acl_out_ip6_l2_node_feat_next_node_index,
976 &acl_out_l2_ip6_node);
979 vlib_node_registration_t acl_out_l2_ip4_node;
981 acl_out_ip4_l2_node_fn (vlib_main_t * vm,
982 vlib_node_runtime_t * node, vlib_frame_t * frame)
984 acl_main_t *am = &acl_main;
985 return acl_fa_node_fn (vm, node, frame, 0, 0, 1,
986 am->fa_acl_out_ip4_l2_node_feat_next_node_index,
987 &acl_out_l2_ip4_node);
991 /**** L3 processing path nodes ****/
994 vlib_node_registration_t acl_in_fa_ip6_node;
996 acl_in_ip6_fa_node_fn (vlib_main_t * vm,
997 vlib_node_runtime_t * node, vlib_frame_t * frame)
999 return acl_fa_node_fn (vm, node, frame, 1, 1, 0, 0, &acl_in_fa_ip6_node);
1002 vlib_node_registration_t acl_in_fa_ip4_node;
1004 acl_in_ip4_fa_node_fn (vlib_main_t * vm,
1005 vlib_node_runtime_t * node, vlib_frame_t * frame)
1007 return acl_fa_node_fn (vm, node, frame, 0, 1, 0, 0, &acl_in_fa_ip4_node);
1010 vlib_node_registration_t acl_out_fa_ip6_node;
1012 acl_out_ip6_fa_node_fn (vlib_main_t * vm,
1013 vlib_node_runtime_t * node, vlib_frame_t * frame)
1015 return acl_fa_node_fn (vm, node, frame, 1, 0, 0, 0, &acl_out_fa_ip6_node);
1018 vlib_node_registration_t acl_out_fa_ip4_node;
1020 acl_out_ip4_fa_node_fn (vlib_main_t * vm,
1021 vlib_node_runtime_t * node, vlib_frame_t * frame)
1023 return acl_fa_node_fn (vm, node, frame, 0, 0, 0, 0, &acl_out_fa_ip4_node);
1027 * This process performs all the connection clean up - both for idle connections,
1028 * as well as receiving the signals to clean up the connections in case of sw_if_index deletion,
1029 * or (maybe in the future) the connection deletion due to policy reasons.
1031 * The previous iteration (l2sess) attempted to clean up the connections in small increments,
1032 * in-band, but the problem it tried to preemptively address (process starvation) is yet to be seen.
1034 * The approach with a single thread deleting the connections is simpler, thus we use it until
1035 * there is a real starvation problem to solve.
1041 #define foreach_acl_fa_cleaner_error \
1042 _(UNKNOWN_EVENT, "unknown event received") \
1047 #define _(sym,str) ACL_FA_CLEANER_ERROR_##sym,
1048 foreach_acl_fa_cleaner_error
1050 ACL_FA_CLEANER_N_ERROR,
1051 } acl_fa_cleaner_error_t;
1053 static char *acl_fa_cleaner_error_strings[] = {
1054 #define _(sym,string) string,
1055 foreach_acl_fa_cleaner_error
1060 acl_fa_clean_sessions_by_sw_if_index (acl_main_t *am, u32 sw_if_index, u32 *count)
1068 pool_foreach(sess, am->fa_sessions_pool, ({
1069 if ( (~0 == sw_if_index) || (sw_if_index == sess->sw_if_index) )
1070 vec_add1(dv, sess-am->fa_sessions_pool);
1074 sess = pool_elt_at_index(am->fa_sessions_pool, *ii);
1075 acl_fa_delete_session(am, sess->sw_if_index, *ii);
1079 pool_foreach(sess, am->fa_sessions_pool, ({
1080 if ( (~0 == sw_if_index) || (sw_if_index == sess->sw_if_index) )
1085 if (~0 == sw_if_index)
1087 /* FIXME: clean-up tables ? */
1091 /* FIXME: clean-up tables ? */
1094 return (undeleted == 0);
1098 static vlib_node_registration_t acl_fa_session_cleaner_process_node;
1101 acl_fa_conn_time_to_check (acl_main_t *am, u64 now, u32 session_index)
1103 fa_session_t *sess = am->fa_sessions_pool + session_index;
1105 sess->link_enqueue_time + fa_session_get_timeout (am, sess);
1106 return (timeout_time < now);
1111 acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1114 acl_main_t *am = &acl_main;
1115 u64 now = clib_cpu_time_now ();
1116 f64 cpu_cps = vm->clib_time.clocks_per_second;
1118 /* We should call timer wheel at least twice a second */
1119 u64 max_timer_wait_interval = cpu_cps / 2;
1120 am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
1122 u32 *expired = NULL;
1123 uword event_type, *event_data = 0;
1125 am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index;
1129 u32 count_deleted_sessions = 0;
1130 u32 count_already_deleted = 0;
1131 now = clib_cpu_time_now ();
1132 next_expire = now + am->fa_current_cleaner_timer_wait_interval;
1133 int has_pending_conns = 0;
1135 for(tt = 0; tt < ACL_N_TIMEOUTS; tt++)
1137 if (~0 != am->fa_conn_list_head[tt])
1138 has_pending_conns = 1;
1141 /* If no pending connections then no point in timing out */
1142 if (!has_pending_conns)
1144 am->fa_cleaner_cnt_wait_without_timeout++;
1145 (void) vlib_process_wait_for_event (vm);
1146 event_type = vlib_process_get_events (vm, &event_data);
1150 f64 timeout = ((i64) next_expire - (i64) now) / cpu_cps;
1153 /* skip waiting altogether */
1158 /* Timing wheel code is happier if it is called regularly */
1161 am->fa_cleaner_cnt_wait_with_timeout++;
1162 (void) vlib_process_wait_for_event_or_clock (vm, timeout);
1163 event_type = vlib_process_get_events (vm, &event_data);
1167 now = clib_cpu_time_now ();
1173 case ACL_FA_CLEANER_RESCHEDULE:
1174 /* Nothing to do. */
1176 case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX:
1178 uword *sw_if_index0;
1179 vec_foreach (sw_if_index0, event_data)
1181 am->fa_cleaner_cnt_delete_by_sw_index++;
1182 #ifdef FA_NODE_VERBOSE_DEBUG
1184 ("ACL_FA_NODE_CLEAN: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX: %d",
1189 acl_fa_clean_sessions_by_sw_if_index (am, *sw_if_index0,
1191 count_deleted_sessions += count;
1192 am->fa_cleaner_cnt_delete_by_sw_index_ok += result;
1197 #ifdef FA_NODE_VERBOSE_DEBUG
1198 clib_warning ("ACL plugin connection cleaner: unknown event %u",
1201 vlib_node_increment_counter (vm,
1202 acl_fa_session_cleaner_process_node.
1204 ACL_FA_CLEANER_ERROR_UNKNOWN_EVENT, 1);
1205 am->fa_cleaner_cnt_unknown_event++;
1211 for(tt = 0; tt < ACL_N_TIMEOUTS; tt++) {
1212 while((vec_len(expired) < 2*am->fa_max_deleted_sessions_per_interval)
1213 && (~0 != am->fa_conn_list_head[tt])
1214 && (acl_fa_conn_time_to_check(am, now,
1215 am->fa_conn_list_head[tt]))) {
1216 u32 sess_id = am->fa_conn_list_head[tt];
1217 vec_add1(expired, sess_id);
1218 acl_fa_conn_list_delete_session(am, sess_id);
1224 vec_foreach (psid, expired)
1226 u32 session_index = *psid;
1227 if (!pool_is_free_index (am->fa_sessions_pool, session_index))
1229 fa_session_t *sess = am->fa_sessions_pool + session_index;
1230 u32 sw_if_index = sess->sw_if_index;
1231 u64 sess_timeout_time =
1232 sess->last_active_time + fa_session_get_timeout (am, sess);
1233 if (now < sess_timeout_time)
1235 /* clib_warning ("ACL_FA_NODE_CLEAN: Restarting timer for session %d",
1236 (int) session_index); */
1238 /* There was activity on the session, so the idle timeout
1239 has not passed. Enqueue for another time period. */
1241 acl_fa_conn_list_add_session(am, session_index, now);
1243 /* FIXME: When/if moving to timer wheel,
1244 pretend we did this in the past,
1245 at last_active moment, so the timer is accurate */
1246 am->fa_cleaner_cnt_timer_restarted++;
1250 /* clib_warning ("ACL_FA_NODE_CLEAN: Deleting session %d",
1251 (int) session_index); */
1252 acl_fa_delete_session (am, sw_if_index, session_index);
1253 count_deleted_sessions++;
1258 count_already_deleted++;
1262 _vec_len (expired) = 0;
1264 _vec_len (event_data) = 0;
1266 if (count_deleted_sessions > am->fa_max_deleted_sessions_per_interval) {
1267 /* if there was too many sessions to delete, do less waiting around next time */
1268 am->fa_current_cleaner_timer_wait_interval /= 2;
1269 } else if (count_deleted_sessions < am->fa_min_deleted_sessions_per_interval) {
1270 /* Too few deleted sessions, slowly increase the amount of sleep up to a limit */
1271 if (am->fa_current_cleaner_timer_wait_interval < max_timer_wait_interval)
1272 am->fa_current_cleaner_timer_wait_interval += cpu_cps * am->fa_cleaner_wait_time_increment;
1274 am->fa_cleaner_cnt_event_cycles++;
1275 am->fa_cleaner_cnt_deleted_sessions += count_deleted_sessions;
1276 am->fa_cleaner_cnt_already_deleted += count_already_deleted;
1284 acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable)
1286 acl_main_t *am = &acl_main;
1289 vnet_feature_enable_disable ("ip4-unicast", "acl-plugin-in-ip4-fa",
1290 sw_if_index, enable_disable, 0, 0);
1291 vnet_feature_enable_disable ("ip6-unicast", "acl-plugin-in-ip6-fa",
1292 sw_if_index, enable_disable, 0, 0);
1293 am->fa_in_acl_on_sw_if_index =
1294 clib_bitmap_set (am->fa_in_acl_on_sw_if_index, sw_if_index,
1299 vnet_feature_enable_disable ("ip4-output", "acl-plugin-out-ip4-fa",
1300 sw_if_index, enable_disable, 0, 0);
1301 vnet_feature_enable_disable ("ip6-output", "acl-plugin-out-ip6-fa",
1302 sw_if_index, enable_disable, 0, 0);
1303 am->fa_out_acl_on_sw_if_index =
1304 clib_bitmap_set (am->fa_out_acl_on_sw_if_index, sw_if_index,
1307 if ((!enable_disable) && (!acl_fa_ifc_has_in_acl (am, sw_if_index))
1308 && (!acl_fa_ifc_has_out_acl (am, sw_if_index)))
1310 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
1311 ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX,
1321 VLIB_REGISTER_NODE (acl_fa_session_cleaner_process_node, static) = {
1322 .function = acl_fa_session_cleaner_process,
1323 .type = VLIB_NODE_TYPE_PROCESS,
1324 .name = "acl-plugin-fa-cleaner-process",
1325 .n_errors = ARRAY_LEN (acl_fa_cleaner_error_strings),
1326 .error_strings = acl_fa_cleaner_error_strings,
1332 VLIB_REGISTER_NODE (acl_in_l2_ip6_node) =
1334 .function = acl_in_ip6_l2_node_fn,
1335 .name = "acl-plugin-in-ip6-l2",
1336 .vector_size = sizeof (u32),
1337 .format_trace = format_acl_fa_trace,
1338 .type = VLIB_NODE_TYPE_INTERNAL,
1339 .n_errors = ARRAY_LEN (acl_fa_error_strings),
1340 .error_strings = acl_fa_error_strings,
1341 .n_next_nodes = ACL_FA_N_NEXT,
1344 [ACL_FA_ERROR_DROP] = "error-drop",
1348 VLIB_REGISTER_NODE (acl_in_l2_ip4_node) =
1350 .function = acl_in_ip4_l2_node_fn,
1351 .name = "acl-plugin-in-ip4-l2",
1352 .vector_size = sizeof (u32),
1353 .format_trace = format_acl_fa_trace,
1354 .type = VLIB_NODE_TYPE_INTERNAL,
1355 .n_errors = ARRAY_LEN (acl_fa_error_strings),
1356 .error_strings = acl_fa_error_strings,
1357 .n_next_nodes = ACL_FA_N_NEXT,
1360 [ACL_FA_ERROR_DROP] = "error-drop",
1364 VLIB_REGISTER_NODE (acl_out_l2_ip6_node) =
1366 .function = acl_out_ip6_l2_node_fn,
1367 .name = "acl-plugin-out-ip6-l2",
1368 .vector_size = sizeof (u32),
1369 .format_trace = format_acl_fa_trace,
1370 .type = VLIB_NODE_TYPE_INTERNAL,
1371 .n_errors = ARRAY_LEN (acl_fa_error_strings),
1372 .error_strings = acl_fa_error_strings,
1373 .n_next_nodes = ACL_FA_N_NEXT,
1376 [ACL_FA_ERROR_DROP] = "error-drop",
1380 VLIB_REGISTER_NODE (acl_out_l2_ip4_node) =
1382 .function = acl_out_ip4_l2_node_fn,
1383 .name = "acl-plugin-out-ip4-l2",
1384 .vector_size = sizeof (u32),
1385 .format_trace = format_acl_fa_trace,
1386 .type = VLIB_NODE_TYPE_INTERNAL,
1387 .n_errors = ARRAY_LEN (acl_fa_error_strings),
1388 .error_strings = acl_fa_error_strings,
1389 .n_next_nodes = ACL_FA_N_NEXT,
1392 [ACL_FA_ERROR_DROP] = "error-drop",
1397 VLIB_REGISTER_NODE (acl_in_fa_ip6_node) =
1399 .function = acl_in_ip6_fa_node_fn,
1400 .name = "acl-plugin-in-ip6-fa",
1401 .vector_size = sizeof (u32),
1402 .format_trace = format_acl_fa_trace,
1403 .type = VLIB_NODE_TYPE_INTERNAL,
1404 .n_errors = ARRAY_LEN (acl_fa_error_strings),
1405 .error_strings = acl_fa_error_strings,
1406 .n_next_nodes = ACL_FA_N_NEXT,
1409 [ACL_FA_ERROR_DROP] = "error-drop",
1413 VNET_FEATURE_INIT (acl_in_ip6_fa_feature, static) =
1415 .arc_name = "ip6-unicast",
1416 .node_name = "acl-plugin-in-ip6-fa",
1417 .runs_before = VNET_FEATURES ("ip6-flow-classify"),
1420 VLIB_REGISTER_NODE (acl_in_fa_ip4_node) =
1422 .function = acl_in_ip4_fa_node_fn,
1423 .name = "acl-plugin-in-ip4-fa",
1424 .vector_size = sizeof (u32),
1425 .format_trace = format_acl_fa_trace,
1426 .type = VLIB_NODE_TYPE_INTERNAL,
1427 .n_errors = ARRAY_LEN (acl_fa_error_strings),
1428 .error_strings = acl_fa_error_strings,
1429 .n_next_nodes = ACL_FA_N_NEXT,
1432 [ACL_FA_ERROR_DROP] = "error-drop",
1436 VNET_FEATURE_INIT (acl_in_ip4_fa_feature, static) =
1438 .arc_name = "ip4-unicast",
1439 .node_name = "acl-plugin-in-ip4-fa",
1440 .runs_before = VNET_FEATURES ("ip4-flow-classify"),
1444 VLIB_REGISTER_NODE (acl_out_fa_ip6_node) =
1446 .function = acl_out_ip6_fa_node_fn,
1447 .name = "acl-plugin-out-ip6-fa",
1448 .vector_size = sizeof (u32),
1449 .format_trace = format_acl_fa_trace,
1450 .type = VLIB_NODE_TYPE_INTERNAL,
1451 .n_errors = ARRAY_LEN (acl_fa_error_strings),
1452 .error_strings = acl_fa_error_strings,
1453 .n_next_nodes = ACL_FA_N_NEXT,
1456 [ACL_FA_ERROR_DROP] = "error-drop",
1460 VNET_FEATURE_INIT (acl_out_ip6_fa_feature, static) =
1462 .arc_name = "ip6-output",
1463 .node_name = "acl-plugin-out-ip6-fa",
1464 .runs_before = VNET_FEATURES ("interface-output"),
1467 VLIB_REGISTER_NODE (acl_out_fa_ip4_node) =
1469 .function = acl_out_ip4_fa_node_fn,
1470 .name = "acl-plugin-out-ip4-fa",
1471 .vector_size = sizeof (u32),
1472 .format_trace = format_acl_fa_trace,
1473 .type = VLIB_NODE_TYPE_INTERNAL,
1474 .n_errors = ARRAY_LEN (acl_fa_error_strings),
1475 .error_strings = acl_fa_error_strings,
1476 .n_next_nodes = ACL_FA_N_NEXT,
1477 /* edit / add dispositions here */
1480 [ACL_FA_ERROR_DROP] = "error-drop",
1484 VNET_FEATURE_INIT (acl_out_ip4_fa_feature, static) =
1486 .arc_name = "ip4-output",
1487 .node_name = "acl-plugin-out-ip4-fa",
1488 .runs_before = VNET_FEATURES ("interface-output"),