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.
17 #include <vnet/fib/ip4_fib.h>
19 #include <vnet/gre/packet.h>
20 #include <lb/lbhash.h>
22 #define foreach_lb_error \
24 _(PROTO_NOT_SUPPORTED, "protocol not supported")
28 #define _(sym,str) LB_ERROR_##sym,
34 static char *lb_error_strings[] =
36 #define _(sym,string) string,
52 } lb_nodeport_trace_t;
63 format_lb_trace (u8 * s, va_list * args)
65 lb_main_t *lbm = &lb_main;
66 CLIB_UNUSED(vlib_main_t * vm)
67 = va_arg (*args, vlib_main_t *);
68 CLIB_UNUSED(vlib_node_t * node)
69 = va_arg (*args, vlib_node_t *);
70 lb_trace_t *t = va_arg (*args, lb_trace_t *);
71 if (pool_is_free_index(lbm->vips, t->vip_index))
73 s = format (s, "lb vip[%d]: This VIP was freed since capture\n");
77 s = format (s, "lb vip[%d]: %U\n", t->vip_index, format_lb_vip,
78 &lbm->vips[t->vip_index]);
80 if (pool_is_free_index(lbm->ass, t->as_index))
82 s = format (s, "lb as[%d]: This AS was freed since capture\n");
86 s = format (s, "lb as[%d]: %U\n", t->as_index, format_lb_as,
87 &lbm->ass[t->as_index]);
93 format_lb_nat_trace (u8 * s, va_list * args)
95 lb_main_t *lbm = &lb_main;
96 CLIB_UNUSED(vlib_main_t * vm)
97 = va_arg (*args, vlib_main_t *);
98 CLIB_UNUSED(vlib_node_t * node)
99 = va_arg (*args, vlib_node_t *);
100 lb_nat_trace_t *t = va_arg (*args, lb_nat_trace_t *);
102 if (pool_is_free_index(lbm->vips, t->vip_index))
104 s = format (s, "lb vip[%d]: This VIP was freed since capture\n");
108 s = format (s, "lb vip[%d]: %U\n", t->vip_index, format_lb_vip,
109 &lbm->vips[t->vip_index]);
111 if (pool_is_free_index(lbm->ass, t->as_index))
113 s = format (s, "lb as[%d]: This AS was freed since capture\n");
117 s = format (s, "lb as[%d]: %U\n", t->as_index, format_lb_as,
118 &lbm->ass[t->as_index]);
120 s = format (s, "lb nat: rx_sw_if_index = %d, next_index = %d",
121 t->rx_sw_if_index, t->next_index);
127 lb_get_sticky_table (u32 thread_index)
129 lb_main_t *lbm = &lb_main;
130 lb_hash_t *sticky_ht = lbm->per_cpu[thread_index].sticky_ht;
131 //Check if size changed
133 sticky_ht && (lbm->per_cpu_sticky_buckets != lb_hash_nbuckets(sticky_ht))))
135 //Dereference everything in there
138 lb_hash_foreach_entry(sticky_ht, b, i)
140 vlib_refcount_add (&lbm->as_refcount, thread_index, b->value[i], -1);
141 vlib_refcount_add (&lbm->as_refcount, thread_index, 0, 1);
144 lb_hash_free (sticky_ht);
148 //Create if necessary
149 if (PREDICT_FALSE(sticky_ht == NULL))
151 lbm->per_cpu[thread_index].sticky_ht = lb_hash_alloc (
152 lbm->per_cpu_sticky_buckets, lbm->flow_timeout);
153 sticky_ht = lbm->per_cpu[thread_index].sticky_ht;
154 clib_warning("Regenerated sticky table %p", sticky_ht);
160 sticky_ht->timeout = lbm->flow_timeout;
165 lb_node_get_other_ports4 (ip4_header_t *ip40)
171 lb_node_get_other_ports6 (ip6_header_t *ip60)
176 static_always_inline void
177 lb_node_get_hash (lb_main_t *lbm, vlib_buffer_t *p, u8 is_input_v4,
178 u32 *hash, u32 *vip_idx, u8 per_port_vip)
181 clib_bihash_kv_8_8_t kv, value;
183 /* For vip case, retrieve vip index for ip lookup */
184 *vip_idx = vnet_buffer (p)->ip.adj_index[VLIB_TX];
188 /* For per-port-vip case, ip lookup stores dummy index */
189 key.vip_prefix_index = *vip_idx;
197 ip40 = vlib_buffer_get_current (p);
199 ip40->protocol == IP_PROTOCOL_TCP
200 || ip40->protocol == IP_PROTOCOL_UDP))
201 ports = ((u64) ((udp_header_t *) (ip40 + 1))->src_port << 16)
202 | ((u64) ((udp_header_t *) (ip40 + 1))->dst_port);
204 ports = lb_node_get_other_ports4 (ip40);
206 *hash = lb_hash_hash (*((u64 *) &ip40->address_pair), ports, 0, 0, 0);
210 key.protocol = ip40->protocol;
211 key.port = (u16)(ports & 0xFFFF);
217 ip60 = vlib_buffer_get_current (p);
221 ip60->protocol == IP_PROTOCOL_TCP
222 || ip60->protocol == IP_PROTOCOL_UDP))
223 ports = ((u64) ((udp_header_t *) (ip60 + 1))->src_port << 16)
224 | ((u64) ((udp_header_t *) (ip60 + 1))->dst_port);
226 ports = lb_node_get_other_ports6 (ip60);
228 *hash = lb_hash_hash (ip60->src_address.as_u64[0],
229 ip60->src_address.as_u64[1],
230 ip60->dst_address.as_u64[0],
231 ip60->dst_address.as_u64[1], ports);
235 key.protocol = ip60->protocol;
236 key.port = (u16)(ports & 0xFFFF);
240 /* For per-port-vip case, retrieve vip index for vip_port_filter table */
244 if (clib_bihash_search_8_8(&lbm->vip_index_per_port, &kv, &value) < 0)
246 /* return default vip */
250 *vip_idx = value.value;
254 static_always_inline uword
255 lb_node_fn (vlib_main_t * vm,
256 vlib_node_runtime_t * node,
257 vlib_frame_t * frame,
258 u8 is_input_v4, //Compile-time parameter stating that is input is v4 (or v6)
259 lb_encap_type_t encap_type, //Compile-time parameter is GRE4/GRE6/L3DSR/NAT4/NAT6
260 u8 per_port_vip) //Compile-time parameter stating that is per_port_vip or not
262 lb_main_t *lbm = &lb_main;
263 u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
264 u32 thread_index = vm->thread_index;
265 u32 lb_time = lb_hash_time_now (vm);
267 lb_hash_t *sticky_ht = lb_get_sticky_table (thread_index);
268 from = vlib_frame_vector_args (frame);
269 n_left_from = frame->n_vectors;
270 next_index = node->cached_next_index;
273 u32 next_vip_idx0 = ~0;
274 if (PREDICT_TRUE(n_left_from > 0))
276 vlib_buffer_t *p0 = vlib_get_buffer (vm, from[0]);
277 lb_node_get_hash (lbm, p0, is_input_v4, &nexthash0,
278 &next_vip_idx0, per_port_vip);
281 while (n_left_from > 0)
283 vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
284 while (n_left_from > 0 && n_left_to_next > 0)
291 u32 available_index0;
293 u32 hash0 = nexthash0;
294 u32 vip_index0 = next_vip_idx0;
297 if (PREDICT_TRUE(n_left_from > 1))
299 vlib_buffer_t *p1 = vlib_get_buffer (vm, from[1]);
300 //Compute next hash and prefetch bucket
301 lb_node_get_hash (lbm, p1, is_input_v4,
302 &nexthash0, &next_vip_idx0,
304 lb_hash_prefetch_bucket (sticky_ht, nexthash0);
305 //Prefetch for encap, next
306 CLIB_PREFETCH(vlib_buffer_get_current (p1) - 64, 64, STORE);
309 if (PREDICT_TRUE(n_left_from > 2))
312 p2 = vlib_get_buffer (vm, from[2]);
313 /* prefetch packet header and data */
314 vlib_prefetch_buffer_header(p2, STORE);
315 CLIB_PREFETCH(vlib_buffer_get_current (p2), 64, STORE);
318 pi0 = to_next[0] = from[0];
324 p0 = vlib_get_buffer (vm, pi0);
326 vip0 = pool_elt_at_index(lbm->vips, vip_index0);
331 ip40 = vlib_buffer_get_current (p0);
332 len0 = clib_net_to_host_u16 (ip40->length);
337 ip60 = vlib_buffer_get_current (p0);
338 len0 = clib_net_to_host_u16 (ip60->payload_length)
339 + sizeof(ip6_header_t);
342 lb_hash_get (sticky_ht, hash0,
344 &available_index0, &asindex0);
346 if (PREDICT_TRUE(asindex0 != ~0))
348 //Found an existing entry
349 counter = LB_VIP_COUNTER_NEXT_PACKET;
351 else if (PREDICT_TRUE(available_index0 != ~0))
353 //There is an available slot for a new flow
355 vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index;
356 counter = LB_VIP_COUNTER_FIRST_PACKET;
357 counter = (asindex0 == 0) ? LB_VIP_COUNTER_NO_SERVER : counter;
359 //TODO: There are race conditions with as0 and vip0 manipulation.
360 //Configuration may be changed, vectors resized, etc...
362 //Dereference previously used
364 &lbm->as_refcount, thread_index,
365 lb_hash_available_value (sticky_ht, hash0, available_index0),
367 vlib_refcount_add (&lbm->as_refcount, thread_index, asindex0, 1);
370 //Note that when there is no AS configured, an entry is configured anyway.
371 //But no configured AS is not something that should happen
372 lb_hash_put (sticky_ht, hash0, asindex0,
374 available_index0, lb_time);
378 //Could not store new entry in the table
380 vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index;
381 counter = LB_VIP_COUNTER_UNTRACKED_PACKET;
384 vlib_increment_simple_counter (
385 &lbm->vip_counters[counter], thread_index,
390 if ((encap_type == LB_ENCAP_TYPE_GRE4)
391 || (encap_type == LB_ENCAP_TYPE_GRE6))
394 if (encap_type == LB_ENCAP_TYPE_GRE4) /* encap GRE4*/
397 vlib_buffer_advance (
398 p0, -sizeof(ip4_header_t) - sizeof(gre_header_t));
399 ip40 = vlib_buffer_get_current (p0);
400 gre0 = (gre_header_t *) (ip40 + 1);
401 ip40->src_address = lbm->ip4_src_address;
402 ip40->dst_address = lbm->ass[asindex0].address.ip4;
403 ip40->ip_version_and_header_length = 0x45;
405 ip40->fragment_id = 0;
406 ip40->flags_and_fragment_offset = 0;
407 ip40->length = clib_host_to_net_u16 (
408 len0 + sizeof(gre_header_t) + sizeof(ip4_header_t));
409 ip40->protocol = IP_PROTOCOL_GRE;
410 ip40->checksum = ip4_header_checksum (ip40);
415 vlib_buffer_advance (
416 p0, -sizeof(ip6_header_t) - sizeof(gre_header_t));
417 ip60 = vlib_buffer_get_current (p0);
418 gre0 = (gre_header_t *) (ip60 + 1);
419 ip60->dst_address = lbm->ass[asindex0].address.ip6;
420 ip60->src_address = lbm->ip6_src_address;
421 ip60->hop_limit = 128;
422 ip60->ip_version_traffic_class_and_flow_label =
423 clib_host_to_net_u32 (0x6 << 28);
424 ip60->payload_length = clib_host_to_net_u16 (
425 len0 + sizeof(gre_header_t));
426 ip60->protocol = IP_PROTOCOL_GRE;
429 gre0->flags_and_version = 0;
432 clib_host_to_net_u16 (0x0800) :
433 clib_host_to_net_u16 (0x86DD);
435 else if (encap_type == LB_ENCAP_TYPE_L3DSR) /* encap L3DSR*/
440 u32 old_dst, new_dst;
443 ip40 = vlib_buffer_get_current (p0);
444 old_dst = ip40->dst_address.as_u32;
445 new_dst = lbm->ass[asindex0].address.ip4.as_u32;
446 ip40->dst_address.as_u32 = lbm->ass[asindex0].address.ip4.as_u32;
447 /* Get and rewrite DSCP bit */
449 new_tos = (u8) ((vip0->encap_args.dscp & 0x3F) << 2);
450 ip40->tos = (u8) ((vip0->encap_args.dscp & 0x3F) << 2);
452 csum = ip40->checksum;
453 csum = ip_csum_update (csum, old_tos, new_tos,
455 tos /* changed member */);
456 csum = ip_csum_update (csum, old_dst, new_dst,
458 dst_address /* changed member */);
459 ip40->checksum = ip_csum_fold (csum);
461 /* Recomputing L4 checksum after dst-IP modifying */
462 th0 = ip4_next_header (ip40);
464 th0->checksum = ip4_tcp_udp_compute_checksum (vm, p0, ip40);
466 else if ((encap_type == LB_ENCAP_TYPE_NAT4)
467 || (encap_type == LB_ENCAP_TYPE_NAT6))
473 if ((is_input_v4 == 1) && (encap_type == LB_ENCAP_TYPE_NAT4))
478 ip40 = vlib_buffer_get_current (p0);
479 uh = (udp_header_t *) (ip40 + 1);
480 old_dst = ip40->dst_address.as_u32;
481 ip40->dst_address = lbm->ass[asindex0].address.ip4;
483 csum = ip40->checksum;
484 csum = ip_csum_sub_even (csum, old_dst);
485 csum = ip_csum_add_even (
486 csum, lbm->ass[asindex0].address.ip4.as_u32);
487 ip40->checksum = ip_csum_fold (csum);
489 if (ip40->protocol == IP_PROTOCOL_UDP)
491 uh->dst_port = vip0->encap_args.target_port;
493 csum = ip_csum_sub_even (csum, old_dst);
494 csum = ip_csum_add_even (
495 csum, lbm->ass[asindex0].address.ip4.as_u32);
496 uh->checksum = ip_csum_fold (csum);
503 else if ((is_input_v4 == 0) && (encap_type == LB_ENCAP_TYPE_NAT6))
507 ip6_address_t old_dst;
509 ip60 = vlib_buffer_get_current (p0);
510 uh = (udp_header_t *) (ip60 + 1);
512 old_dst.as_u64[0] = ip60->dst_address.as_u64[0];
513 old_dst.as_u64[1] = ip60->dst_address.as_u64[1];
514 ip60->dst_address.as_u64[0] =
515 lbm->ass[asindex0].address.ip6.as_u64[0];
516 ip60->dst_address.as_u64[1] =
517 lbm->ass[asindex0].address.ip6.as_u64[1];
519 if (PREDICT_TRUE(ip60->protocol == IP_PROTOCOL_UDP))
521 uh->dst_port = vip0->encap_args.target_port;
523 csum = ip_csum_sub_even (csum, old_dst.as_u64[0]);
524 csum = ip_csum_sub_even (csum, old_dst.as_u64[1]);
525 csum = ip_csum_add_even (
526 csum, lbm->ass[asindex0].address.ip6.as_u64[0]);
527 csum = ip_csum_add_even (
528 csum, lbm->ass[asindex0].address.ip6.as_u64[1]);
529 uh->checksum = ip_csum_fold (csum);
537 next0 = lbm->ass[asindex0].dpo.dpoi_next_node;
538 //Note that this is going to error if asindex0 == 0
539 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
540 lbm->ass[asindex0].dpo.dpoi_index;
542 if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
544 lb_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof(*tr));
545 tr->as_index = asindex0;
546 tr->vip_index = vip_index0;
550 vlib_validate_buffer_enqueue_x1(
551 vm, node, next_index, to_next, n_left_to_next, pi0, next0);
553 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
556 return frame->n_vectors;
560 format_nodeport_lb_trace (u8 * s, va_list * args)
562 lb_main_t *lbm = &lb_main;
563 CLIB_UNUSED(vlib_main_t * vm)
564 = va_arg (*args, vlib_main_t *);
565 CLIB_UNUSED(vlib_node_t * node)
566 = va_arg (*args, vlib_node_t *);
567 lb_nodeport_trace_t *t = va_arg (*args, lb_nodeport_trace_t *);
568 if (pool_is_free_index(lbm->vips, t->vip_index))
570 s = format (s, "lb vip[%d]: This VIP was freed since capture\n");
574 s = format (s, "lb vip[%d]: %U\n", t->vip_index, format_lb_vip,
575 &lbm->vips[t->vip_index]);
578 s = format (s, " lb node_port: %d", t->node_port);
584 lb_nodeport_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
585 vlib_frame_t * frame, u8 is_input_v4)
587 lb_main_t *lbm = &lb_main;
588 u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
590 from = vlib_frame_vector_args (frame);
591 n_left_from = frame->n_vectors;
592 next_index = node->cached_next_index;
594 while (n_left_from > 0)
596 vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
598 while (n_left_from > 0 && n_left_to_next > 0)
602 udp_header_t * udp_0;
605 if (PREDICT_TRUE(n_left_from > 1))
607 vlib_buffer_t *p1 = vlib_get_buffer (vm, from[1]);
608 //Prefetch for encap, next
609 CLIB_PREFETCH(vlib_buffer_get_current (p1) - 64, 64, STORE);
612 if (PREDICT_TRUE(n_left_from > 2))
615 p2 = vlib_get_buffer (vm, from[2]);
616 /* prefetch packet header and data */
617 vlib_prefetch_buffer_header(p2, STORE);
618 CLIB_PREFETCH(vlib_buffer_get_current (p2), 64, STORE);
621 pi0 = to_next[0] = from[0];
627 p0 = vlib_get_buffer (vm, pi0);
632 vlib_buffer_advance (
633 p0, -(word) (sizeof(udp_header_t) + sizeof(ip4_header_t)));
634 ip40 = vlib_buffer_get_current (p0);
635 udp_0 = (udp_header_t *) (ip40 + 1);
640 vlib_buffer_advance (
641 p0, -(word) (sizeof(udp_header_t) + sizeof(ip6_header_t)));
642 ip60 = vlib_buffer_get_current (p0);
643 udp_0 = (udp_header_t *) (ip60 + 1);
646 entry0 = hash_get_mem(lbm->vip_index_by_nodeport, &(udp_0->dst_port));
649 vnet_buffer(p0)->ip.adj_index[VLIB_TX] = entry0[0];
651 if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
653 lb_nodeport_trace_t *tr = vlib_add_trace (vm, node, p0,
655 tr->vip_index = entry0[0];
656 tr->node_port = (u32) clib_net_to_host_u16 (udp_0->dst_port);
659 vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
662 LB4_NODEPORT_NEXT_IP4_NAT4 : LB6_NODEPORT_NEXT_IP6_NAT6);
664 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
667 return frame->n_vectors;
672 * @brief Match NAT44 static mapping.
674 * @param sm NAT main.
675 * @param match Address and port to match.
676 * @param index index to the pool.
678 * @returns 0 if match found, otherwise -1.
681 lb_nat44_mapping_match (lb_main_t *lbm, lb_snat4_key_t * match, u32 *index)
683 clib_bihash_kv_8_8_t kv4, value;
684 clib_bihash_8_8_t *mapping_hash = &lbm->mapping_by_as4;
686 kv4.key = match->as_u64;
688 if (clib_bihash_search_8_8 (mapping_hash, &kv4, &value))
693 *index = value.value;
698 * @brief Match NAT66 static mapping.
700 * @param sm NAT main.
701 * @param match Address and port to match.
702 * @param mapping External or local address and port of the matched mapping.
704 * @returns 0 if match found otherwise 1.
707 lb_nat66_mapping_match (lb_main_t *lbm, lb_snat6_key_t * match, u32 *index)
709 clib_bihash_kv_24_8_t kv6, value;
710 lb_snat6_key_t m_key6;
711 clib_bihash_24_8_t *mapping_hash = &lbm->mapping_by_as6;
713 m_key6.addr.as_u64[0] = match->addr.as_u64[0];
714 m_key6.addr.as_u64[1] = match->addr.as_u64[1];
715 m_key6.port = match->port;
717 m_key6.fib_index = 0;
719 kv6.key[0] = m_key6.as_u64[0];
720 kv6.key[1] = m_key6.as_u64[1];
721 kv6.key[2] = m_key6.as_u64[2];
723 if (clib_bihash_search_24_8 (mapping_hash, &kv6, &value))
728 *index = value.value;
733 lb_nat_in2out_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
734 vlib_frame_t * frame, u32 is_nat4)
736 u32 n_left_from, *from, *to_next;
738 u32 pkts_processed = 0;
739 lb_main_t *lbm = &lb_main;
740 u32 stats_node_index;
743 is_nat4 ? lb_nat4_in2out_node.index : lb_nat6_in2out_node.index;
745 from = vlib_frame_vector_args (frame);
746 n_left_from = frame->n_vectors;
747 next_index = node->cached_next_index;
749 while (n_left_from > 0)
753 vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
755 while (n_left_from > 0 && n_left_to_next > 0)
762 u16 old_port0, new_port0;
769 /* speculatively enqueue b0 to the current next frame */
777 b0 = vlib_get_buffer (vm, bi0);
778 next0 = LB_NAT4_IN2OUT_NEXT_LOOKUP;
779 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
780 rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (
786 u32 old_addr0, new_addr0;
787 lb_snat4_key_t key40;
788 lb_snat_mapping_t *sm40;
791 ip40 = vlib_buffer_get_current (b0);
792 udp0 = ip4_next_header (ip40);
793 tcp0 = (tcp_header_t *) udp0;
794 proto0 = lb_ip_proto_to_nat_proto (ip40->protocol);
796 key40.addr = ip40->src_address;
797 key40.protocol = proto0;
798 key40.port = udp0->src_port;
799 key40.fib_index = rx_fib_index0;
801 if (lb_nat44_mapping_match (lbm, &key40, &index40))
803 next0 = LB_NAT4_IN2OUT_NEXT_DROP;
807 sm40 = pool_elt_at_index(lbm->snat_mappings, index40);
808 new_addr0 = sm40->src_ip.ip4.as_u32;
809 new_port0 = sm40->src_port;
810 vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm40->fib_index;
811 old_addr0 = ip40->src_address.as_u32;
812 ip40->src_address.as_u32 = new_addr0;
814 csum = ip40->checksum;
815 csum = ip_csum_sub_even (csum, old_addr0);
816 csum = ip_csum_add_even (csum, new_addr0);
817 ip40->checksum = ip_csum_fold (csum);
819 if (PREDICT_TRUE(proto0 == LB_NAT_PROTOCOL_TCP))
821 old_port0 = tcp0->src_port;
822 tcp0->src_port = new_port0;
824 csum = tcp0->checksum;
825 csum = ip_csum_sub_even (csum, old_addr0);
826 csum = ip_csum_sub_even (csum, old_port0);
827 csum = ip_csum_add_even (csum, new_addr0);
828 csum = ip_csum_add_even (csum, new_port0);
829 tcp0->checksum = ip_csum_fold (csum);
831 else if (PREDICT_TRUE(proto0 == LB_NAT_PROTOCOL_UDP))
833 old_port0 = udp0->src_port;
834 udp0->src_port = new_port0;
836 csum = udp0->checksum;
837 csum = ip_csum_sub_even (csum, old_addr0);
838 csum = ip_csum_sub_even (csum, old_port0);
839 csum = ip_csum_add_even (csum, new_addr0);
840 csum = ip_csum_add_even (csum, new_port0);
841 udp0->checksum = ip_csum_fold (csum);
844 pkts_processed += next0 != LB_NAT4_IN2OUT_NEXT_DROP;
849 ip6_address_t old_addr0, new_addr0;
850 lb_snat6_key_t key60;
851 lb_snat_mapping_t *sm60;
854 ip60 = vlib_buffer_get_current (b0);
855 udp0 = ip6_next_header (ip60);
856 tcp0 = (tcp_header_t *) udp0;
857 proto0 = lb_ip_proto_to_nat_proto (ip60->protocol);
859 key60.addr.as_u64[0] = ip60->src_address.as_u64[0];
860 key60.addr.as_u64[1] = ip60->src_address.as_u64[1];
861 key60.protocol = proto0;
862 key60.port = udp0->src_port;
863 key60.fib_index = rx_fib_index0;
865 if (lb_nat66_mapping_match (lbm, &key60, &index60))
867 next0 = LB_NAT6_IN2OUT_NEXT_DROP;
871 sm60 = pool_elt_at_index(lbm->snat_mappings, index60);
872 new_addr0.as_u64[0] = sm60->src_ip.as_u64[0];
873 new_addr0.as_u64[1] = sm60->src_ip.as_u64[1];
874 new_port0 = sm60->src_port;
875 vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm60->fib_index;
876 old_addr0.as_u64[0] = ip60->src_address.as_u64[0];
877 old_addr0.as_u64[1] = ip60->src_address.as_u64[1];
878 ip60->src_address.as_u64[0] = new_addr0.as_u64[0];
879 ip60->src_address.as_u64[1] = new_addr0.as_u64[1];
881 if (PREDICT_TRUE(proto0 == LB_NAT_PROTOCOL_TCP))
883 old_port0 = tcp0->src_port;
884 tcp0->src_port = new_port0;
886 csum = tcp0->checksum;
887 csum = ip_csum_sub_even (csum, old_addr0.as_u64[0]);
888 csum = ip_csum_sub_even (csum, old_addr0.as_u64[1]);
889 csum = ip_csum_add_even (csum, new_addr0.as_u64[0]);
890 csum = ip_csum_add_even (csum, new_addr0.as_u64[1]);
891 csum = ip_csum_sub_even (csum, old_port0);
892 csum = ip_csum_add_even (csum, new_port0);
893 tcp0->checksum = ip_csum_fold (csum);
895 else if (PREDICT_TRUE(proto0 == LB_NAT_PROTOCOL_UDP))
897 old_port0 = udp0->src_port;
898 udp0->src_port = new_port0;
900 csum = udp0->checksum;
901 csum = ip_csum_sub_even (csum, old_addr0.as_u64[0]);
902 csum = ip_csum_sub_even (csum, old_addr0.as_u64[1]);
903 csum = ip_csum_add_even (csum, new_addr0.as_u64[0]);
904 csum = ip_csum_add_even (csum, new_addr0.as_u64[1]);
905 csum = ip_csum_sub_even (csum, old_port0);
906 csum = ip_csum_add_even (csum, new_port0);
907 udp0->checksum = ip_csum_fold (csum);
910 pkts_processed += next0 != LB_NAT4_IN2OUT_NEXT_DROP;
913 trace0: if (PREDICT_FALSE(
914 (node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED)))
916 lb_nat_trace_t *t = vlib_add_trace (vm, node, b0, sizeof(*t));
917 t->rx_sw_if_index = sw_if_index0;
918 t->next_index = next0;
921 /* verify speculative enqueue, maybe switch current next frame */
922 vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
923 n_left_to_next, bi0, next0);
926 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
929 vlib_node_increment_counter (vm, stats_node_index,
930 LB_NAT_IN2OUT_ERROR_IN2OUT_PACKETS,
932 return frame->n_vectors;
936 lb6_gre6_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
937 vlib_frame_t * frame)
939 return lb_node_fn (vm, node, frame, 0, LB_ENCAP_TYPE_GRE6, 0);
943 lb6_gre4_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
944 vlib_frame_t * frame)
946 return lb_node_fn (vm, node, frame, 0, LB_ENCAP_TYPE_GRE4, 0);
950 lb4_gre6_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
951 vlib_frame_t * frame)
953 return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_GRE6, 0);
957 lb4_gre4_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
958 vlib_frame_t * frame)
960 return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_GRE4, 0);
964 lb6_gre6_port_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
965 vlib_frame_t * frame)
967 return lb_node_fn (vm, node, frame, 0, LB_ENCAP_TYPE_GRE6, 1);
971 lb6_gre4_port_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
972 vlib_frame_t * frame)
974 return lb_node_fn (vm, node, frame, 0, LB_ENCAP_TYPE_GRE4, 1);
978 lb4_gre6_port_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
979 vlib_frame_t * frame)
981 return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_GRE6, 1);
985 lb4_gre4_port_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
986 vlib_frame_t * frame)
988 return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_GRE4, 1);
992 lb4_l3dsr_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
993 vlib_frame_t * frame)
995 return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_L3DSR, 0);
999 lb4_l3dsr_port_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1000 vlib_frame_t * frame)
1002 return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_L3DSR, 1);
1006 lb6_nat6_port_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1007 vlib_frame_t * frame)
1009 return lb_node_fn (vm, node, frame, 0, LB_ENCAP_TYPE_NAT6, 1);
1013 lb4_nat4_port_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1014 vlib_frame_t * frame)
1016 return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_NAT4, 1);
1020 lb_nat4_in2out_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1021 vlib_frame_t * frame)
1023 return lb_nat_in2out_node_fn (vm, node, frame, 1);
1027 lb_nat6_in2out_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1028 vlib_frame_t * frame)
1030 return lb_nat_in2out_node_fn (vm, node, frame, 0);
1033 VLIB_REGISTER_NODE (lb6_gre6_node) =
1035 .function = lb6_gre6_node_fn,
1037 .vector_size = sizeof(u32),
1038 .format_trace = format_lb_trace,
1039 .n_errors = LB_N_ERROR,
1040 .error_strings = lb_error_strings,
1041 .n_next_nodes = LB_N_NEXT,
1043 { [LB_NEXT_DROP] = "error-drop" },
1046 VLIB_REGISTER_NODE (lb6_gre4_node) =
1048 .function = lb6_gre4_node_fn,
1050 .vector_size = sizeof(u32),
1051 .format_trace = format_lb_trace,
1052 .n_errors = LB_N_ERROR,
1053 .error_strings = lb_error_strings,
1054 .n_next_nodes = LB_N_NEXT,
1056 { [LB_NEXT_DROP] = "error-drop" },
1059 VLIB_REGISTER_NODE (lb4_gre6_node) =
1061 .function = lb4_gre6_node_fn,
1063 .vector_size = sizeof(u32),
1064 .format_trace = format_lb_trace,
1065 .n_errors = LB_N_ERROR,
1066 .error_strings = lb_error_strings,
1067 .n_next_nodes = LB_N_NEXT,
1069 { [LB_NEXT_DROP] = "error-drop" },
1072 VLIB_REGISTER_NODE (lb4_gre4_node) =
1074 .function = lb4_gre4_node_fn,
1076 .vector_size = sizeof(u32),
1077 .format_trace = format_lb_trace,
1078 .n_errors = LB_N_ERROR,
1079 .error_strings = lb_error_strings,
1080 .n_next_nodes = LB_N_NEXT,
1082 { [LB_NEXT_DROP] = "error-drop" },
1085 VLIB_REGISTER_NODE (lb6_gre6_port_node) =
1087 .function = lb6_gre6_port_node_fn,
1088 .name = "lb6-gre6-port",
1089 .vector_size = sizeof(u32),
1090 .format_trace = format_lb_trace,
1091 .n_errors = LB_N_ERROR,
1092 .error_strings = lb_error_strings,
1093 .n_next_nodes = LB_N_NEXT,
1095 { [LB_NEXT_DROP] = "error-drop" },
1098 VLIB_REGISTER_NODE (lb6_gre4_port_node) =
1100 .function = lb6_gre4_port_node_fn,
1101 .name = "lb6-gre4-port",
1102 .vector_size = sizeof(u32),
1103 .format_trace = format_lb_trace,
1104 .n_errors = LB_N_ERROR,
1105 .error_strings = lb_error_strings,
1106 .n_next_nodes = LB_N_NEXT,
1108 { [LB_NEXT_DROP] = "error-drop" },
1111 VLIB_REGISTER_NODE (lb4_gre6_port_node) =
1113 .function = lb4_gre6_port_node_fn,
1114 .name = "lb4-gre6-port",
1115 .vector_size = sizeof(u32),
1116 .format_trace = format_lb_trace,
1117 .n_errors = LB_N_ERROR,
1118 .error_strings = lb_error_strings,
1119 .n_next_nodes = LB_N_NEXT,
1121 { [LB_NEXT_DROP] = "error-drop" },
1124 VLIB_REGISTER_NODE (lb4_gre4_port_node) =
1126 .function = lb4_gre4_port_node_fn,
1127 .name = "lb4-gre4-port",
1128 .vector_size = sizeof(u32),
1129 .format_trace = format_lb_trace,
1130 .n_errors = LB_N_ERROR,
1131 .error_strings = lb_error_strings,
1132 .n_next_nodes = LB_N_NEXT,
1134 { [LB_NEXT_DROP] = "error-drop" },
1137 VLIB_REGISTER_NODE (lb4_l3dsr_port_node) =
1139 .function = lb4_l3dsr_port_node_fn,
1140 .name = "lb4-l3dsr-port",
1141 .vector_size = sizeof(u32),
1142 .format_trace = format_lb_trace,
1143 .n_errors = LB_N_ERROR,
1144 .error_strings = lb_error_strings,
1145 .n_next_nodes = LB_N_NEXT,
1147 { [LB_NEXT_DROP] = "error-drop" },
1150 VLIB_REGISTER_NODE (lb4_l3dsr_node) =
1152 .function = lb4_l3dsr_node_fn,
1153 .name = "lb4-l3dsr",
1154 .vector_size = sizeof(u32),
1155 .format_trace = format_lb_trace,
1156 .n_errors = LB_N_ERROR,
1157 .error_strings = lb_error_strings,
1158 .n_next_nodes = LB_N_NEXT,
1160 { [LB_NEXT_DROP] = "error-drop" },
1163 VLIB_REGISTER_NODE (lb6_nat6_port_node) =
1165 .function = lb6_nat6_port_node_fn,
1166 .name = "lb6-nat6-port",
1167 .vector_size = sizeof(u32),
1168 .format_trace = format_lb_trace,
1169 .n_errors = LB_N_ERROR,
1170 .error_strings = lb_error_strings,
1171 .n_next_nodes = LB_N_NEXT,
1173 { [LB_NEXT_DROP] = "error-drop" },
1176 VLIB_REGISTER_NODE (lb4_nat4_port_node) =
1178 .function = lb4_nat4_port_node_fn,
1179 .name = "lb4-nat4-port",
1180 .vector_size = sizeof(u32),
1181 .format_trace = format_lb_trace,
1182 .n_errors = LB_N_ERROR,
1183 .error_strings = lb_error_strings,
1184 .n_next_nodes = LB_N_NEXT,
1186 { [LB_NEXT_DROP] = "error-drop" },
1190 lb4_nodeport_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1191 vlib_frame_t * frame)
1193 return lb_nodeport_node_fn (vm, node, frame, 1);
1197 lb6_nodeport_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1198 vlib_frame_t * frame)
1200 return lb_nodeport_node_fn (vm, node, frame, 0);
1203 VLIB_REGISTER_NODE (lb4_nodeport_node) =
1205 .function = lb4_nodeport_node_fn,
1206 .name = "lb4-nodeport",
1207 .vector_size = sizeof(u32),
1208 .format_trace = format_nodeport_lb_trace,
1209 .n_errors = LB_N_ERROR,
1210 .error_strings = lb_error_strings,
1211 .n_next_nodes = LB4_NODEPORT_N_NEXT,
1214 [LB4_NODEPORT_NEXT_IP4_NAT4] = "lb4-nat4-port",
1215 [LB4_NODEPORT_NEXT_DROP] = "error-drop",
1219 VLIB_REGISTER_NODE (lb6_nodeport_node) =
1221 .function = lb6_nodeport_node_fn,
1222 .name = "lb6-nodeport",
1223 .vector_size = sizeof(u32),
1224 .format_trace = format_nodeport_lb_trace,
1225 .n_errors = LB_N_ERROR,
1226 .error_strings = lb_error_strings,
1227 .n_next_nodes = LB6_NODEPORT_N_NEXT,
1230 [LB6_NODEPORT_NEXT_IP6_NAT6] = "lb6-nat6-port",
1231 [LB6_NODEPORT_NEXT_DROP] = "error-drop",
1235 VNET_FEATURE_INIT (lb_nat4_in2out_node_fn, static) =
1237 .arc_name = "ip4-unicast",
1238 .node_name = "lb-nat4-in2out",
1239 .runs_before = VNET_FEATURES("ip4-lookup"),
1242 VLIB_REGISTER_NODE (lb_nat4_in2out_node) =
1244 .function = lb_nat4_in2out_node_fn,
1245 .name = "lb-nat4-in2out",
1246 .vector_size = sizeof(u32),
1247 .format_trace = format_lb_nat_trace,
1248 .n_errors = LB_N_ERROR,
1249 .error_strings = lb_error_strings,
1250 .n_next_nodes = LB_NAT4_IN2OUT_N_NEXT,
1253 [LB_NAT4_IN2OUT_NEXT_DROP] = "error-drop",
1254 [LB_NAT4_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
1258 VNET_FEATURE_INIT (lb_nat6_in2out_node_fn, static) =
1260 .arc_name = "ip6-unicast",
1261 .node_name = "lb-nat6-in2out",
1262 .runs_before = VNET_FEATURES("ip6-lookup"),
1265 VLIB_REGISTER_NODE (lb_nat6_in2out_node) =
1267 .function = lb_nat6_in2out_node_fn,
1268 .name = "lb-nat6-in2out",
1269 .vector_size = sizeof(u32),
1270 .format_trace = format_lb_nat_trace,
1271 .n_errors = LB_N_ERROR,
1272 .error_strings = lb_error_strings,
1273 .n_next_nodes = LB_NAT6_IN2OUT_N_NEXT,
1276 [LB_NAT6_IN2OUT_NEXT_DROP] = "error-drop",
1277 [LB_NAT6_IN2OUT_NEXT_LOOKUP] = "ip6-lookup",