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.
17 * @brief NAT64 implementation
20 #include <nat/nat64.h>
21 #include <nat/nat64_db.h>
22 #include <nat/nat_reass.h>
23 #include <nat/nat_inlines.h>
24 #include <vnet/fib/ip4_fib.h>
25 #include <vppinfra/crc32.h>
28 nat64_main_t nat64_main;
32 /* Hook up input features */
33 VNET_FEATURE_INIT (nat64_in2out, static) = {
34 .arc_name = "ip6-unicast",
35 .node_name = "nat64-in2out",
36 .runs_before = VNET_FEATURES ("ip6-lookup"),
38 VNET_FEATURE_INIT (nat64_out2in, static) = {
39 .arc_name = "ip4-unicast",
40 .node_name = "nat64-out2in",
41 .runs_before = VNET_FEATURES ("ip4-lookup"),
43 VNET_FEATURE_INIT (nat64_in2out_handoff, static) = {
44 .arc_name = "ip6-unicast",
45 .node_name = "nat64-in2out-handoff",
46 .runs_before = VNET_FEATURES ("ip6-lookup"),
48 VNET_FEATURE_INIT (nat64_out2in_handoff, static) = {
49 .arc_name = "ip4-unicast",
50 .node_name = "nat64-out2in-handoff",
51 .runs_before = VNET_FEATURES ("ip4-lookup"),
55 static u8 well_known_prefix[] = {
56 0x00, 0x64, 0xff, 0x9b,
57 0x00, 0x00, 0x00, 0x00,
58 0x00, 0x00, 0x00, 0x00,
59 0x00, 0x00, 0x00, 0x00
65 nat64_ip4_add_del_interface_address_cb (ip4_main_t * im, uword opaque,
67 ip4_address_t * address,
69 u32 if_address_index, u32 is_delete)
71 nat64_main_t *nm = &nat64_main;
74 for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
76 if (sw_if_index == nm->auto_add_sw_if_indices[i])
80 /* Don't trip over lease renewal, static config */
81 for (j = 0; j < vec_len (nm->addr_pool); j++)
82 if (nm->addr_pool[j].addr.as_u32 == address->as_u32)
85 (void) nat64_add_del_pool_addr (address, ~0, 1);
90 (void) nat64_add_del_pool_addr (address, ~0, 0);
98 nat64_get_worker_in2out (ip6_address_t * addr)
100 nat64_main_t *nm = &nat64_main;
101 snat_main_t *sm = nm->sm;
102 u32 next_worker_index = nm->sm->first_worker_index;
105 #ifdef clib_crc32c_uses_intrinsics
106 hash = clib_crc32c ((u8 *) addr->as_u32, 16);
108 u64 tmp = addr->as_u64[0] ^ addr->as_u64[1];
109 hash = clib_xxhash (tmp);
112 if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
113 next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
115 next_worker_index += sm->workers[hash % _vec_len (sm->workers)];
117 return next_worker_index;
121 nat64_get_worker_out2in (ip4_header_t * ip)
123 nat64_main_t *nm = &nat64_main;
124 snat_main_t *sm = nm->sm;
129 proto = ip_proto_to_snat_proto (ip->protocol);
130 udp = ip4_next_header (ip);
131 port = udp->dst_port;
134 if (PREDICT_FALSE (ip4_is_fragment (ip)))
136 if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
137 return vlib_get_thread_index ();
139 if (PREDICT_TRUE (!ip4_is_first_fragment (ip)))
141 nat_reass_ip4_t *reass;
143 reass = nat_ip4_reass_find (ip->src_address, ip->dst_address,
144 ip->fragment_id, ip->protocol);
146 if (reass && (reass->thread_index != (u32) ~ 0))
147 return reass->thread_index;
149 return vlib_get_thread_index ();
153 /* unknown protocol */
154 if (PREDICT_FALSE (proto == ~0))
157 ip46_address_t daddr;
158 nat64_db_bib_entry_t *bibe;
160 memset (&daddr, 0, sizeof (daddr));
161 daddr.ip4.as_u32 = ip->dst_address.as_u32;
164 vec_foreach (db, nm->db)
166 bibe = nat64_db_bib_entry_find (db, &daddr, 0, ip->protocol, 0, 0);
168 return (u32) (db - nm->db);
171 return vlib_get_thread_index ();
175 if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP))
177 icmp46_header_t *icmp = (icmp46_header_t *) udp;
178 icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
179 if (!icmp_is_error_message (icmp))
180 port = echo->identifier;
183 ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
184 proto = ip_proto_to_snat_proto (inner_ip->protocol);
185 void *l4_header = ip4_next_header (inner_ip);
188 case SNAT_PROTOCOL_ICMP:
189 icmp = (icmp46_header_t *) l4_header;
190 echo = (icmp_echo_header_t *) (icmp + 1);
191 port = echo->identifier;
193 case SNAT_PROTOCOL_UDP:
194 case SNAT_PROTOCOL_TCP:
195 port = ((tcp_udp_header_t *) l4_header)->src_port;
198 return vlib_get_thread_index ();
203 /* worker by outside port (TCP/UDP) */
204 port = clib_net_to_host_u16 (port);
206 return nm->sm->first_worker_index + ((port - 1024) / sm->port_per_thread);
208 return vlib_get_thread_index ();
212 nat64_init (vlib_main_t * vm)
214 nat64_main_t *nm = &nat64_main;
215 vlib_thread_main_t *tm = vlib_get_thread_main ();
216 ip4_add_del_interface_address_callback_t cb4;
217 ip4_main_t *im = &ip4_main;
218 vlib_node_t *error_drop_node =
219 vlib_get_node_by_name (vm, (u8 *) "error-drop");
221 vec_validate (nm->db, tm->n_vlib_mains - 1);
225 nm->fq_in2out_index = ~0;
226 nm->fq_out2in_index = ~0;
227 nm->error_node_index = error_drop_node->index;
229 /* set session timeouts to default values */
230 nm->udp_timeout = SNAT_UDP_TIMEOUT;
231 nm->icmp_timeout = SNAT_ICMP_TIMEOUT;
232 nm->tcp_trans_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
233 nm->tcp_est_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
235 nm->total_enabled_count = 0;
237 /* Set up the interface address add/del callback */
238 cb4.function = nat64_ip4_add_del_interface_address_cb;
239 cb4.function_opaque = 0;
240 vec_add1 (im->add_del_interface_address_callbacks, cb4);
246 static void nat64_free_out_addr_and_port (struct nat64_db_s *db,
247 ip4_address_t * addr, u16 port,
251 nat64_set_hash (u32 bib_buckets, u32 bib_memory_size, u32 st_buckets,
254 nat64_main_t *nm = &nat64_main;
257 nm->bib_buckets = bib_buckets;
258 nm->bib_memory_size = bib_memory_size;
259 nm->st_buckets = st_buckets;
260 nm->st_memory_size = st_memory_size;
263 vec_foreach (db, nm->db)
265 if (nat64_db_init (db, bib_buckets, bib_memory_size, st_buckets,
266 st_memory_size, nat64_free_out_addr_and_port))
267 clib_warning ("NAT64 DB init failed");
273 nat64_add_del_pool_addr (ip4_address_t * addr, u32 vrf_id, u8 is_add)
275 nat64_main_t *nm = &nat64_main;
276 snat_address_t *a = 0;
277 snat_interface_t *interface;
280 vlib_thread_main_t *tm = vlib_get_thread_main ();
282 /* Check if address already exists */
283 for (i = 0; i < vec_len (nm->addr_pool); i++)
285 if (nm->addr_pool[i].addr.as_u32 == addr->as_u32)
287 a = nm->addr_pool + i;
295 return VNET_API_ERROR_VALUE_EXIST;
297 vec_add2 (nm->addr_pool, a, 1);
302 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
303 FIB_SOURCE_PLUGIN_HI);
304 #define _(N, id, n, s) \
305 clib_bitmap_alloc (a->busy_##n##_port_bitmap, 65535); \
306 a->busy_##n##_ports = 0; \
307 vec_validate_init_empty (a->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
308 foreach_snat_protocol
314 return VNET_API_ERROR_NO_SUCH_ENTRY;
316 if (a->fib_index != ~0)
317 fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP6,
318 FIB_SOURCE_PLUGIN_HI);
319 /* Delete sessions using address */
321 vec_foreach (db, nm->db)
322 nat64_db_free_out_addr (db, &a->addr);
323 #define _(N, id, n, s) \
324 clib_bitmap_free (a->busy_##n##_port_bitmap);
325 foreach_snat_protocol
328 vec_del1 (nm->addr_pool, i);
331 /* Add/del external address to FIB */
333 pool_foreach (interface, nm->interfaces,
335 if (nat_interface_is_inside(interface))
338 snat_add_del_addr_to_fib (addr, 32, interface->sw_if_index, is_add);
347 nat64_pool_addr_walk (nat64_pool_addr_walk_fn_t fn, void *ctx)
349 nat64_main_t *nm = &nat64_main;
350 snat_address_t *a = 0;
353 vec_foreach (a, nm->addr_pool)
362 nat64_add_interface_address (u32 sw_if_index, int is_add)
364 nat64_main_t *nm = &nat64_main;
365 ip4_main_t *ip4_main = nm->ip4_main;
366 ip4_address_t *first_int_addr;
369 first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0);
371 for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
373 if (nm->auto_add_sw_if_indices[i] == sw_if_index)
376 return VNET_API_ERROR_VALUE_EXIST;
379 /* if have address remove it */
381 (void) nat64_add_del_pool_addr (first_int_addr, ~0, 0);
383 vec_del1 (nm->auto_add_sw_if_indices, i);
390 return VNET_API_ERROR_NO_SUCH_ENTRY;
392 /* add to the auto-address list */
393 vec_add1 (nm->auto_add_sw_if_indices, sw_if_index);
395 /* If the address is already bound - or static - add it now */
397 (void) nat64_add_del_pool_addr (first_int_addr, ~0, 1);
403 nat64_add_del_interface (u32 sw_if_index, u8 is_inside, u8 is_add)
405 nat64_main_t *nm = &nat64_main;
406 snat_interface_t *interface = 0, *i;
408 const char *feature_name, *arc_name;
410 /* Check if interface already exists */
412 pool_foreach (i, nm->interfaces,
414 if (i->sw_if_index == sw_if_index)
427 pool_get (nm->interfaces, interface);
428 interface->sw_if_index = sw_if_index;
429 interface->flags = 0;
432 interface->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
434 interface->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
436 nm->total_enabled_count++;
437 vlib_process_signal_event (nm->sm->vlib_main,
438 nm->nat64_expire_walk_node_index,
439 NAT64_CLEANER_RESCHEDULE, 0);
445 return VNET_API_ERROR_NO_SUCH_ENTRY;
447 if ((nat_interface_is_inside (interface)
448 && nat_interface_is_outside (interface)))
450 is_inside ? ~NAT_INTERFACE_FLAG_IS_INSIDE :
451 ~NAT_INTERFACE_FLAG_IS_OUTSIDE;
453 pool_put (nm->interfaces, interface);
455 nm->total_enabled_count--;
461 vec_foreach (ap, nm->addr_pool)
462 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, is_add);
466 if (nm->sm->num_workers > 1)
469 is_inside ? "nat64-in2out-handoff" : "nat64-out2in-handoff";
470 if (nm->fq_in2out_index == ~0)
471 nm->fq_in2out_index =
472 vlib_frame_queue_main_init (nat64_in2out_node.index, 0);
473 if (nm->fq_out2in_index == ~0)
474 nm->fq_out2in_index =
475 vlib_frame_queue_main_init (nat64_out2in_node.index, 0);
478 feature_name = is_inside ? "nat64-in2out" : "nat64-out2in";
480 arc_name = is_inside ? "ip6-unicast" : "ip4-unicast";
482 return vnet_feature_enable_disable (arc_name, feature_name, sw_if_index,
487 nat64_interfaces_walk (nat64_interface_walk_fn_t fn, void *ctx)
489 nat64_main_t *nm = &nat64_main;
490 snat_interface_t *i = 0;
493 pool_foreach (i, nm->interfaces,
502 nat64_alloc_out_addr_and_port (u32 fib_index, snat_protocol_t proto,
503 ip4_address_t * addr, u16 * port,
506 nat64_main_t *nm = &nat64_main;
507 snat_main_t *sm = nm->sm;
508 snat_session_key_t k;
509 u32 worker_index = 0;
514 if (sm->num_workers > 1)
515 worker_index = thread_index - sm->first_worker_index;
518 sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k,
519 sm->port_per_thread, worker_index);
524 addr->as_u32 = k.addr.as_u32;
531 nat64_free_out_addr_and_port (struct nat64_db_s *db, ip4_address_t * addr,
532 u16 port, u8 protocol)
534 nat64_main_t *nm = &nat64_main;
537 u32 thread_index = db - nm->db;
538 snat_protocol_t proto = ip_proto_to_snat_proto (protocol);
539 u16 port_host_byte_order = clib_net_to_host_u16 (port);
541 for (i = 0; i < vec_len (nm->addr_pool); i++)
543 a = nm->addr_pool + i;
544 if (addr->as_u32 != a->addr.as_u32)
548 #define _(N, j, n, s) \
549 case SNAT_PROTOCOL_##N: \
550 ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
551 port_host_byte_order) == 1); \
552 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, port, 0); \
553 a->busy_##n##_ports--; \
554 a->busy_##n##_ports_per_thread[thread_index]--; \
556 foreach_snat_protocol
559 clib_warning ("unknown protocol");
567 * @brief Add/delete static BIB entry in worker thread.
570 nat64_static_bib_worker_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
573 nat64_main_t *nm = &nat64_main;
574 u32 thread_index = vm->thread_index;
575 nat64_db_t *db = &nm->db[thread_index];
576 nat64_static_bib_to_update_t *static_bib;
577 nat64_db_bib_entry_t *bibe;
581 pool_foreach (static_bib, nm->static_bibs,
583 if ((static_bib->thread_index != thread_index) || (static_bib->done))
586 if (static_bib->is_add)
587 (void) nat64_db_bib_entry_create (db, &static_bib->in_addr,
588 &static_bib->out_addr,
590 static_bib->out_port,
591 static_bib->fib_index,
592 static_bib->proto, 1);
595 addr.as_u64[0] = static_bib->in_addr.as_u64[0];
596 addr.as_u64[1] = static_bib->in_addr.as_u64[1];
597 bibe = nat64_db_bib_entry_find (db, &addr, static_bib->in_port,
599 static_bib->fib_index, 1);
601 nat64_db_bib_entry_free (db, bibe);
604 static_bib->done = 1;
611 static vlib_node_registration_t nat64_static_bib_worker_node;
614 VLIB_REGISTER_NODE (nat64_static_bib_worker_node, static) = {
615 .function = nat64_static_bib_worker_fn,
616 .type = VLIB_NODE_TYPE_INPUT,
617 .state = VLIB_NODE_STATE_INTERRUPT,
618 .name = "nat64-static-bib-worker",
623 nat64_add_del_static_bib_entry (ip6_address_t * in_addr,
624 ip4_address_t * out_addr, u16 in_port,
625 u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
627 nat64_main_t *nm = &nat64_main;
628 nat64_db_bib_entry_t *bibe;
629 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
630 FIB_SOURCE_PLUGIN_HI);
631 snat_protocol_t p = ip_proto_to_snat_proto (proto);
635 u32 thread_index = 0;
637 nat64_static_bib_to_update_t *static_bib;
638 vlib_main_t *worker_vm;
639 u32 *to_be_free = 0, *index;
641 if (nm->sm->num_workers > 1)
643 thread_index = nat64_get_worker_in2out (in_addr);
644 db = &nm->db[thread_index];
647 db = &nm->db[nm->sm->num_workers];
649 addr.as_u64[0] = in_addr->as_u64[0];
650 addr.as_u64[1] = in_addr->as_u64[1];
652 nat64_db_bib_entry_find (db, &addr, clib_host_to_net_u16 (in_port),
653 proto, fib_index, 1);
658 return VNET_API_ERROR_VALUE_EXIST;
660 /* outside port must be assigned to same thread as internall address */
661 if ((out_port > 1024) && (nm->sm->num_workers > 1))
663 if (thread_index != ((out_port - 1024) / nm->sm->port_per_thread))
664 return VNET_API_ERROR_INVALID_VALUE_2;
667 for (i = 0; i < vec_len (nm->addr_pool); i++)
669 a = nm->addr_pool + i;
670 if (out_addr->as_u32 != a->addr.as_u32)
674 #define _(N, j, n, s) \
675 case SNAT_PROTOCOL_##N: \
676 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
678 return VNET_API_ERROR_INVALID_VALUE; \
679 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
681 if (out_port > 1024) \
683 a->busy_##n##_ports++; \
684 a->busy_##n##_ports_per_thread[thread_index]++; \
687 foreach_snat_protocol
690 memset (&addr, 0, sizeof (addr));
691 addr.ip4.as_u32 = out_addr->as_u32;
692 if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
693 return VNET_API_ERROR_INVALID_VALUE;
697 if (!nm->sm->num_workers)
700 nat64_db_bib_entry_create (db, in_addr, out_addr,
701 clib_host_to_net_u16 (in_port),
702 clib_host_to_net_u16 (out_port),
703 fib_index, proto, 1);
705 return VNET_API_ERROR_UNSPECIFIED;
711 return VNET_API_ERROR_NO_SUCH_ENTRY;
713 if (!nm->sm->num_workers)
714 nat64_db_bib_entry_free (db, bibe);
717 if (nm->sm->num_workers)
720 pool_foreach (static_bib, nm->static_bibs,
722 if (static_bib->done)
723 vec_add1 (to_be_free, static_bib - nm->static_bibs);
725 vec_foreach (index, to_be_free)
726 pool_put_index (nm->static_bibs, index[0]);
728 vec_free (to_be_free);
729 pool_get (nm->static_bibs, static_bib);
730 static_bib->in_addr.as_u64[0] = in_addr->as_u64[0];
731 static_bib->in_addr.as_u64[1] = in_addr->as_u64[1];
732 static_bib->in_port = clib_host_to_net_u16 (in_port);
733 static_bib->out_addr.as_u32 = out_addr->as_u32;
734 static_bib->out_port = clib_host_to_net_u16 (out_port);
735 static_bib->fib_index = fib_index;
736 static_bib->proto = proto;
737 static_bib->is_add = is_add;
738 static_bib->thread_index = thread_index;
739 static_bib->done = 0;
740 worker_vm = vlib_mains[thread_index];
742 vlib_node_set_interrupt_pending (worker_vm,
743 nat64_static_bib_worker_node.index);
745 return VNET_API_ERROR_UNSPECIFIED;
752 nat64_set_udp_timeout (u32 timeout)
754 nat64_main_t *nm = &nat64_main;
757 nm->udp_timeout = SNAT_UDP_TIMEOUT;
759 nm->udp_timeout = timeout;
765 nat64_get_udp_timeout (void)
767 nat64_main_t *nm = &nat64_main;
769 return nm->udp_timeout;
773 nat64_set_icmp_timeout (u32 timeout)
775 nat64_main_t *nm = &nat64_main;
778 nm->icmp_timeout = SNAT_ICMP_TIMEOUT;
780 nm->icmp_timeout = timeout;
786 nat64_get_icmp_timeout (void)
788 nat64_main_t *nm = &nat64_main;
790 return nm->icmp_timeout;
794 nat64_set_tcp_timeouts (u32 trans, u32 est)
796 nat64_main_t *nm = &nat64_main;
799 nm->tcp_trans_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
801 nm->tcp_trans_timeout = trans;
804 nm->tcp_est_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
806 nm->tcp_est_timeout = est;
812 nat64_get_tcp_trans_timeout (void)
814 nat64_main_t *nm = &nat64_main;
816 return nm->tcp_trans_timeout;
820 nat64_get_tcp_est_timeout (void)
822 nat64_main_t *nm = &nat64_main;
824 return nm->tcp_est_timeout;
828 nat64_session_reset_timeout (nat64_db_st_entry_t * ste, vlib_main_t * vm)
830 nat64_main_t *nm = &nat64_main;
831 u32 now = (u32) vlib_time_now (vm);
833 switch (ip_proto_to_snat_proto (ste->proto))
835 case SNAT_PROTOCOL_ICMP:
836 ste->expire = now + nm->icmp_timeout;
838 case SNAT_PROTOCOL_TCP:
840 switch (ste->tcp_state)
842 case NAT64_TCP_STATE_V4_INIT:
843 case NAT64_TCP_STATE_V6_INIT:
844 case NAT64_TCP_STATE_V4_FIN_RCV:
845 case NAT64_TCP_STATE_V6_FIN_RCV:
846 case NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV:
847 case NAT64_TCP_STATE_TRANS:
848 ste->expire = now + nm->tcp_trans_timeout;
850 case NAT64_TCP_STATE_ESTABLISHED:
851 ste->expire = now + nm->tcp_est_timeout;
857 case SNAT_PROTOCOL_UDP:
858 ste->expire = now + nm->udp_timeout;
861 ste->expire = now + nm->udp_timeout;
867 nat64_tcp_session_set_state (nat64_db_st_entry_t * ste, tcp_header_t * tcp,
870 switch (ste->tcp_state)
872 case NAT64_TCP_STATE_CLOSED:
874 if (tcp->flags & TCP_FLAG_SYN)
877 ste->tcp_state = NAT64_TCP_STATE_V6_INIT;
879 ste->tcp_state = NAT64_TCP_STATE_V4_INIT;
883 case NAT64_TCP_STATE_V4_INIT:
885 if (is_ip6 && (tcp->flags & TCP_FLAG_SYN))
886 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
889 case NAT64_TCP_STATE_V6_INIT:
891 if (!is_ip6 && (tcp->flags & TCP_FLAG_SYN))
892 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
895 case NAT64_TCP_STATE_ESTABLISHED:
897 if (tcp->flags & TCP_FLAG_FIN)
900 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_RCV;
902 ste->tcp_state = NAT64_TCP_STATE_V4_FIN_RCV;
904 else if (tcp->flags & TCP_FLAG_RST)
906 ste->tcp_state = NAT64_TCP_STATE_TRANS;
910 case NAT64_TCP_STATE_V4_FIN_RCV:
912 if (is_ip6 && (tcp->flags & TCP_FLAG_FIN))
913 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
916 case NAT64_TCP_STATE_V6_FIN_RCV:
918 if (!is_ip6 && (tcp->flags & TCP_FLAG_FIN))
919 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
922 case NAT64_TCP_STATE_TRANS:
924 if (!(tcp->flags & TCP_FLAG_RST))
925 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
934 nat64_add_del_prefix (ip6_address_t * prefix, u8 plen, u32 vrf_id, u8 is_add)
936 nat64_main_t *nm = &nat64_main;
937 nat64_prefix_t *p = 0;
940 /* Verify prefix length */
941 if (plen != 32 && plen != 40 && plen != 48 && plen != 56 && plen != 64
943 return VNET_API_ERROR_INVALID_VALUE;
945 /* Check if tenant already have prefix */
946 for (i = 0; i < vec_len (nm->pref64); i++)
948 if (nm->pref64[i].vrf_id == vrf_id)
959 vec_add2 (nm->pref64, p, 1);
961 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
962 FIB_SOURCE_PLUGIN_HI);
966 p->prefix.as_u64[0] = prefix->as_u64[0];
967 p->prefix.as_u64[1] = prefix->as_u64[1];
973 return VNET_API_ERROR_NO_SUCH_ENTRY;
975 vec_del1 (nm->pref64, i);
982 nat64_prefix_walk (nat64_prefix_walk_fn_t fn, void *ctx)
984 nat64_main_t *nm = &nat64_main;
985 nat64_prefix_t *p = 0;
988 vec_foreach (p, nm->pref64)
997 nat64_compose_ip6 (ip6_address_t * ip6, ip4_address_t * ip4, u32 fib_index)
999 nat64_main_t *nm = &nat64_main;
1000 nat64_prefix_t *p, *gp = 0, *prefix = 0;
1003 vec_foreach (p, nm->pref64)
1005 if (p->fib_index == fib_index)
1011 if (p->fib_index == 0)
1021 clib_memcpy (ip6, &p->prefix, sizeof (ip6_address_t));
1025 ip6->as_u32[1] = ip4->as_u32;
1028 ip6->as_u8[5] = ip4->as_u8[0];
1029 ip6->as_u8[6] = ip4->as_u8[1];
1030 ip6->as_u8[7] = ip4->as_u8[2];
1031 ip6->as_u8[9] = ip4->as_u8[3];
1034 ip6->as_u8[6] = ip4->as_u8[0];
1035 ip6->as_u8[7] = ip4->as_u8[1];
1036 ip6->as_u8[9] = ip4->as_u8[2];
1037 ip6->as_u8[10] = ip4->as_u8[3];
1040 ip6->as_u8[7] = ip4->as_u8[0];
1041 ip6->as_u8[9] = ip4->as_u8[1];
1042 ip6->as_u8[10] = ip4->as_u8[2];
1043 ip6->as_u8[11] = ip4->as_u8[3];
1046 ip6->as_u8[9] = ip4->as_u8[0];
1047 ip6->as_u8[10] = ip4->as_u8[1];
1048 ip6->as_u8[11] = ip4->as_u8[2];
1049 ip6->as_u8[12] = ip4->as_u8[3];
1052 ip6->as_u32[3] = ip4->as_u32;
1055 clib_warning ("invalid prefix length");
1061 clib_memcpy (ip6, well_known_prefix, sizeof (ip6_address_t));
1062 ip6->as_u32[3] = ip4->as_u32;
1067 nat64_extract_ip4 (ip6_address_t * ip6, ip4_address_t * ip4, u32 fib_index)
1069 nat64_main_t *nm = &nat64_main;
1070 nat64_prefix_t *p, *gp = 0;
1074 vec_foreach (p, nm->pref64)
1076 if (p->fib_index == fib_index)
1098 ip4->as_u32 = ip6->as_u32[1];
1101 ip4->as_u8[0] = ip6->as_u8[5];
1102 ip4->as_u8[1] = ip6->as_u8[6];
1103 ip4->as_u8[2] = ip6->as_u8[7];
1104 ip4->as_u8[3] = ip6->as_u8[9];
1107 ip4->as_u8[0] = ip6->as_u8[6];
1108 ip4->as_u8[1] = ip6->as_u8[7];
1109 ip4->as_u8[2] = ip6->as_u8[9];
1110 ip4->as_u8[3] = ip6->as_u8[10];
1113 ip4->as_u8[0] = ip6->as_u8[7];
1114 ip4->as_u8[1] = ip6->as_u8[9];
1115 ip4->as_u8[2] = ip6->as_u8[10];
1116 ip4->as_u8[3] = ip6->as_u8[11];
1119 ip4->as_u8[0] = ip6->as_u8[9];
1120 ip4->as_u8[1] = ip6->as_u8[10];
1121 ip4->as_u8[2] = ip6->as_u8[11];
1122 ip4->as_u8[3] = ip6->as_u8[12];
1125 ip4->as_u32 = ip6->as_u32[3];
1128 clib_warning ("invalid prefix length");
1134 * @brief Per worker process checking expire time for NAT64 sessions.
1137 nat64_expire_worker_walk_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
1140 nat64_main_t *nm = &nat64_main;
1141 u32 thread_index = vm->thread_index;
1142 nat64_db_t *db = &nm->db[thread_index];
1143 u32 now = (u32) vlib_time_now (vm);
1145 nad64_db_st_free_expired (db, now);
1150 static vlib_node_registration_t nat64_expire_worker_walk_node;
1153 VLIB_REGISTER_NODE (nat64_expire_worker_walk_node, static) = {
1154 .function = nat64_expire_worker_walk_fn,
1155 .type = VLIB_NODE_TYPE_INPUT,
1156 .state = VLIB_NODE_STATE_INTERRUPT,
1157 .name = "nat64-expire-worker-walk",
1161 static vlib_node_registration_t nat64_expire_walk_node;
1164 * @brief Centralized process to drive per worker expire walk.
1167 nat64_expire_walk_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
1170 nat64_main_t *nm = &nat64_main;
1171 vlib_main_t **worker_vms = 0, *worker_vm;
1173 uword event_type, *event_data = 0;
1175 nm->nat64_expire_walk_node_index = nat64_expire_walk_node.index;
1177 if (vec_len (vlib_mains) == 0)
1178 vec_add1 (worker_vms, vm);
1181 for (i = 0; i < vec_len (vlib_mains); i++)
1183 worker_vm = vlib_mains[i];
1185 vec_add1 (worker_vms, worker_vm);
1191 if (nm->total_enabled_count)
1193 vlib_process_wait_for_event_or_clock (vm, 10.0);
1194 event_type = vlib_process_get_events (vm, &event_data);
1198 vlib_process_wait_for_event (vm);
1199 event_type = vlib_process_get_events (vm, &event_data);
1206 case NAT64_CLEANER_RESCHEDULE:
1209 clib_warning ("unknown event %u", event_type);
1213 for (i = 0; i < vec_len (worker_vms); i++)
1215 worker_vm = worker_vms[i];
1216 vlib_node_set_interrupt_pending (worker_vm,
1217 nat64_expire_worker_walk_node.index);
1225 VLIB_REGISTER_NODE (nat64_expire_walk_node, static) = {
1226 .function = nat64_expire_walk_fn,
1227 .type = VLIB_NODE_TYPE_PROCESS,
1228 .name = "nat64-expire-walk",
1233 * fd.io coding-style-patch-verification: ON
1236 * eval: (c-set-style "gnu")