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;
510 u32 worker_index = 0;
515 if (sm->num_workers > 1)
516 worker_index = thread_index - sm->first_worker_index;
519 sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k, &ai,
520 sm->port_per_thread, worker_index);
525 addr->as_u32 = k.addr.as_u32;
532 nat64_free_out_addr_and_port (struct nat64_db_s *db, ip4_address_t * addr,
533 u16 port, u8 protocol)
535 nat64_main_t *nm = &nat64_main;
538 u32 thread_index = db - nm->db;
539 snat_protocol_t proto = ip_proto_to_snat_proto (protocol);
540 u16 port_host_byte_order = clib_net_to_host_u16 (port);
542 for (i = 0; i < vec_len (nm->addr_pool); i++)
544 a = nm->addr_pool + i;
545 if (addr->as_u32 != a->addr.as_u32)
549 #define _(N, j, n, s) \
550 case SNAT_PROTOCOL_##N: \
551 ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
552 port_host_byte_order) == 1); \
553 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, port, 0); \
554 a->busy_##n##_ports--; \
555 a->busy_##n##_ports_per_thread[thread_index]--; \
557 foreach_snat_protocol
560 clib_warning ("unknown protocol");
568 * @brief Add/delete static BIB entry in worker thread.
571 nat64_static_bib_worker_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
574 nat64_main_t *nm = &nat64_main;
575 u32 thread_index = vm->thread_index;
576 nat64_db_t *db = &nm->db[thread_index];
577 nat64_static_bib_to_update_t *static_bib;
578 nat64_db_bib_entry_t *bibe;
582 pool_foreach (static_bib, nm->static_bibs,
584 if ((static_bib->thread_index != thread_index) || (static_bib->done))
587 if (static_bib->is_add)
588 (void) nat64_db_bib_entry_create (db, &static_bib->in_addr,
589 &static_bib->out_addr,
591 static_bib->out_port,
592 static_bib->fib_index,
593 static_bib->proto, 1);
596 addr.as_u64[0] = static_bib->in_addr.as_u64[0];
597 addr.as_u64[1] = static_bib->in_addr.as_u64[1];
598 bibe = nat64_db_bib_entry_find (db, &addr, static_bib->in_port,
600 static_bib->fib_index, 1);
602 nat64_db_bib_entry_free (db, bibe);
605 static_bib->done = 1;
612 static vlib_node_registration_t nat64_static_bib_worker_node;
615 VLIB_REGISTER_NODE (nat64_static_bib_worker_node, static) = {
616 .function = nat64_static_bib_worker_fn,
617 .type = VLIB_NODE_TYPE_INPUT,
618 .state = VLIB_NODE_STATE_INTERRUPT,
619 .name = "nat64-static-bib-worker",
624 nat64_add_del_static_bib_entry (ip6_address_t * in_addr,
625 ip4_address_t * out_addr, u16 in_port,
626 u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
628 nat64_main_t *nm = &nat64_main;
629 nat64_db_bib_entry_t *bibe;
630 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
631 FIB_SOURCE_PLUGIN_HI);
632 snat_protocol_t p = ip_proto_to_snat_proto (proto);
636 u32 thread_index = 0;
638 nat64_static_bib_to_update_t *static_bib;
639 vlib_main_t *worker_vm;
640 u32 *to_be_free = 0, *index;
642 if (nm->sm->num_workers > 1)
644 thread_index = nat64_get_worker_in2out (in_addr);
645 db = &nm->db[thread_index];
648 db = &nm->db[nm->sm->num_workers];
650 addr.as_u64[0] = in_addr->as_u64[0];
651 addr.as_u64[1] = in_addr->as_u64[1];
653 nat64_db_bib_entry_find (db, &addr, clib_host_to_net_u16 (in_port),
654 proto, fib_index, 1);
659 return VNET_API_ERROR_VALUE_EXIST;
661 /* outside port must be assigned to same thread as internall address */
662 if ((out_port > 1024) && (nm->sm->num_workers > 1))
664 if (thread_index != ((out_port - 1024) / nm->sm->port_per_thread))
665 return VNET_API_ERROR_INVALID_VALUE_2;
668 for (i = 0; i < vec_len (nm->addr_pool); i++)
670 a = nm->addr_pool + i;
671 if (out_addr->as_u32 != a->addr.as_u32)
675 #define _(N, j, n, s) \
676 case SNAT_PROTOCOL_##N: \
677 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
679 return VNET_API_ERROR_INVALID_VALUE; \
680 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
682 if (out_port > 1024) \
684 a->busy_##n##_ports++; \
685 a->busy_##n##_ports_per_thread[thread_index]++; \
688 foreach_snat_protocol
691 memset (&addr, 0, sizeof (addr));
692 addr.ip4.as_u32 = out_addr->as_u32;
693 if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
694 return VNET_API_ERROR_INVALID_VALUE;
698 if (!nm->sm->num_workers)
701 nat64_db_bib_entry_create (db, in_addr, out_addr,
702 clib_host_to_net_u16 (in_port),
703 clib_host_to_net_u16 (out_port),
704 fib_index, proto, 1);
706 return VNET_API_ERROR_UNSPECIFIED;
712 return VNET_API_ERROR_NO_SUCH_ENTRY;
714 if (!nm->sm->num_workers)
715 nat64_db_bib_entry_free (db, bibe);
718 if (nm->sm->num_workers)
721 pool_foreach (static_bib, nm->static_bibs,
723 if (static_bib->done)
724 vec_add1 (to_be_free, static_bib - nm->static_bibs);
726 vec_foreach (index, to_be_free)
727 pool_put_index (nm->static_bibs, index[0]);
729 vec_free (to_be_free);
730 pool_get (nm->static_bibs, static_bib);
731 static_bib->in_addr.as_u64[0] = in_addr->as_u64[0];
732 static_bib->in_addr.as_u64[1] = in_addr->as_u64[1];
733 static_bib->in_port = clib_host_to_net_u16 (in_port);
734 static_bib->out_addr.as_u32 = out_addr->as_u32;
735 static_bib->out_port = clib_host_to_net_u16 (out_port);
736 static_bib->fib_index = fib_index;
737 static_bib->proto = proto;
738 static_bib->is_add = is_add;
739 static_bib->thread_index = thread_index;
740 static_bib->done = 0;
741 worker_vm = vlib_mains[thread_index];
743 vlib_node_set_interrupt_pending (worker_vm,
744 nat64_static_bib_worker_node.index);
746 return VNET_API_ERROR_UNSPECIFIED;
753 nat64_set_udp_timeout (u32 timeout)
755 nat64_main_t *nm = &nat64_main;
758 nm->udp_timeout = SNAT_UDP_TIMEOUT;
760 nm->udp_timeout = timeout;
766 nat64_get_udp_timeout (void)
768 nat64_main_t *nm = &nat64_main;
770 return nm->udp_timeout;
774 nat64_set_icmp_timeout (u32 timeout)
776 nat64_main_t *nm = &nat64_main;
779 nm->icmp_timeout = SNAT_ICMP_TIMEOUT;
781 nm->icmp_timeout = timeout;
787 nat64_get_icmp_timeout (void)
789 nat64_main_t *nm = &nat64_main;
791 return nm->icmp_timeout;
795 nat64_set_tcp_timeouts (u32 trans, u32 est)
797 nat64_main_t *nm = &nat64_main;
800 nm->tcp_trans_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
802 nm->tcp_trans_timeout = trans;
805 nm->tcp_est_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
807 nm->tcp_est_timeout = est;
813 nat64_get_tcp_trans_timeout (void)
815 nat64_main_t *nm = &nat64_main;
817 return nm->tcp_trans_timeout;
821 nat64_get_tcp_est_timeout (void)
823 nat64_main_t *nm = &nat64_main;
825 return nm->tcp_est_timeout;
829 nat64_session_reset_timeout (nat64_db_st_entry_t * ste, vlib_main_t * vm)
831 nat64_main_t *nm = &nat64_main;
832 u32 now = (u32) vlib_time_now (vm);
834 switch (ip_proto_to_snat_proto (ste->proto))
836 case SNAT_PROTOCOL_ICMP:
837 ste->expire = now + nm->icmp_timeout;
839 case SNAT_PROTOCOL_TCP:
841 switch (ste->tcp_state)
843 case NAT64_TCP_STATE_V4_INIT:
844 case NAT64_TCP_STATE_V6_INIT:
845 case NAT64_TCP_STATE_V4_FIN_RCV:
846 case NAT64_TCP_STATE_V6_FIN_RCV:
847 case NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV:
848 case NAT64_TCP_STATE_TRANS:
849 ste->expire = now + nm->tcp_trans_timeout;
851 case NAT64_TCP_STATE_ESTABLISHED:
852 ste->expire = now + nm->tcp_est_timeout;
858 case SNAT_PROTOCOL_UDP:
859 ste->expire = now + nm->udp_timeout;
862 ste->expire = now + nm->udp_timeout;
868 nat64_tcp_session_set_state (nat64_db_st_entry_t * ste, tcp_header_t * tcp,
871 switch (ste->tcp_state)
873 case NAT64_TCP_STATE_CLOSED:
875 if (tcp->flags & TCP_FLAG_SYN)
878 ste->tcp_state = NAT64_TCP_STATE_V6_INIT;
880 ste->tcp_state = NAT64_TCP_STATE_V4_INIT;
884 case NAT64_TCP_STATE_V4_INIT:
886 if (is_ip6 && (tcp->flags & TCP_FLAG_SYN))
887 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
890 case NAT64_TCP_STATE_V6_INIT:
892 if (!is_ip6 && (tcp->flags & TCP_FLAG_SYN))
893 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
896 case NAT64_TCP_STATE_ESTABLISHED:
898 if (tcp->flags & TCP_FLAG_FIN)
901 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_RCV;
903 ste->tcp_state = NAT64_TCP_STATE_V4_FIN_RCV;
905 else if (tcp->flags & TCP_FLAG_RST)
907 ste->tcp_state = NAT64_TCP_STATE_TRANS;
911 case NAT64_TCP_STATE_V4_FIN_RCV:
913 if (is_ip6 && (tcp->flags & TCP_FLAG_FIN))
914 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
917 case NAT64_TCP_STATE_V6_FIN_RCV:
919 if (!is_ip6 && (tcp->flags & TCP_FLAG_FIN))
920 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
923 case NAT64_TCP_STATE_TRANS:
925 if (!(tcp->flags & TCP_FLAG_RST))
926 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
935 nat64_add_del_prefix (ip6_address_t * prefix, u8 plen, u32 vrf_id, u8 is_add)
937 nat64_main_t *nm = &nat64_main;
938 nat64_prefix_t *p = 0;
941 /* Verify prefix length */
942 if (plen != 32 && plen != 40 && plen != 48 && plen != 56 && plen != 64
944 return VNET_API_ERROR_INVALID_VALUE;
946 /* Check if tenant already have prefix */
947 for (i = 0; i < vec_len (nm->pref64); i++)
949 if (nm->pref64[i].vrf_id == vrf_id)
960 vec_add2 (nm->pref64, p, 1);
962 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
963 FIB_SOURCE_PLUGIN_HI);
967 p->prefix.as_u64[0] = prefix->as_u64[0];
968 p->prefix.as_u64[1] = prefix->as_u64[1];
974 return VNET_API_ERROR_NO_SUCH_ENTRY;
976 vec_del1 (nm->pref64, i);
983 nat64_prefix_walk (nat64_prefix_walk_fn_t fn, void *ctx)
985 nat64_main_t *nm = &nat64_main;
986 nat64_prefix_t *p = 0;
989 vec_foreach (p, nm->pref64)
998 nat64_compose_ip6 (ip6_address_t * ip6, ip4_address_t * ip4, u32 fib_index)
1000 nat64_main_t *nm = &nat64_main;
1001 nat64_prefix_t *p, *gp = 0, *prefix = 0;
1004 vec_foreach (p, nm->pref64)
1006 if (p->fib_index == fib_index)
1012 if (p->fib_index == 0)
1022 clib_memcpy (ip6, &p->prefix, sizeof (ip6_address_t));
1026 ip6->as_u32[1] = ip4->as_u32;
1029 ip6->as_u8[5] = ip4->as_u8[0];
1030 ip6->as_u8[6] = ip4->as_u8[1];
1031 ip6->as_u8[7] = ip4->as_u8[2];
1032 ip6->as_u8[9] = ip4->as_u8[3];
1035 ip6->as_u8[6] = ip4->as_u8[0];
1036 ip6->as_u8[7] = ip4->as_u8[1];
1037 ip6->as_u8[9] = ip4->as_u8[2];
1038 ip6->as_u8[10] = ip4->as_u8[3];
1041 ip6->as_u8[7] = ip4->as_u8[0];
1042 ip6->as_u8[9] = ip4->as_u8[1];
1043 ip6->as_u8[10] = ip4->as_u8[2];
1044 ip6->as_u8[11] = ip4->as_u8[3];
1047 ip6->as_u8[9] = ip4->as_u8[0];
1048 ip6->as_u8[10] = ip4->as_u8[1];
1049 ip6->as_u8[11] = ip4->as_u8[2];
1050 ip6->as_u8[12] = ip4->as_u8[3];
1053 ip6->as_u32[3] = ip4->as_u32;
1056 clib_warning ("invalid prefix length");
1062 clib_memcpy (ip6, well_known_prefix, sizeof (ip6_address_t));
1063 ip6->as_u32[3] = ip4->as_u32;
1068 nat64_extract_ip4 (ip6_address_t * ip6, ip4_address_t * ip4, u32 fib_index)
1070 nat64_main_t *nm = &nat64_main;
1071 nat64_prefix_t *p, *gp = 0;
1075 vec_foreach (p, nm->pref64)
1077 if (p->fib_index == fib_index)
1099 ip4->as_u32 = ip6->as_u32[1];
1102 ip4->as_u8[0] = ip6->as_u8[5];
1103 ip4->as_u8[1] = ip6->as_u8[6];
1104 ip4->as_u8[2] = ip6->as_u8[7];
1105 ip4->as_u8[3] = ip6->as_u8[9];
1108 ip4->as_u8[0] = ip6->as_u8[6];
1109 ip4->as_u8[1] = ip6->as_u8[7];
1110 ip4->as_u8[2] = ip6->as_u8[9];
1111 ip4->as_u8[3] = ip6->as_u8[10];
1114 ip4->as_u8[0] = ip6->as_u8[7];
1115 ip4->as_u8[1] = ip6->as_u8[9];
1116 ip4->as_u8[2] = ip6->as_u8[10];
1117 ip4->as_u8[3] = ip6->as_u8[11];
1120 ip4->as_u8[0] = ip6->as_u8[9];
1121 ip4->as_u8[1] = ip6->as_u8[10];
1122 ip4->as_u8[2] = ip6->as_u8[11];
1123 ip4->as_u8[3] = ip6->as_u8[12];
1126 ip4->as_u32 = ip6->as_u32[3];
1129 clib_warning ("invalid prefix length");
1135 * @brief Per worker process checking expire time for NAT64 sessions.
1138 nat64_expire_worker_walk_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
1141 nat64_main_t *nm = &nat64_main;
1142 u32 thread_index = vm->thread_index;
1143 nat64_db_t *db = &nm->db[thread_index];
1144 u32 now = (u32) vlib_time_now (vm);
1146 nad64_db_st_free_expired (db, now);
1151 static vlib_node_registration_t nat64_expire_worker_walk_node;
1154 VLIB_REGISTER_NODE (nat64_expire_worker_walk_node, static) = {
1155 .function = nat64_expire_worker_walk_fn,
1156 .type = VLIB_NODE_TYPE_INPUT,
1157 .state = VLIB_NODE_STATE_INTERRUPT,
1158 .name = "nat64-expire-worker-walk",
1162 static vlib_node_registration_t nat64_expire_walk_node;
1165 * @brief Centralized process to drive per worker expire walk.
1168 nat64_expire_walk_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
1171 nat64_main_t *nm = &nat64_main;
1172 vlib_main_t **worker_vms = 0, *worker_vm;
1174 uword event_type, *event_data = 0;
1176 nm->nat64_expire_walk_node_index = nat64_expire_walk_node.index;
1178 if (vec_len (vlib_mains) == 0)
1179 vec_add1 (worker_vms, vm);
1182 for (i = 0; i < vec_len (vlib_mains); i++)
1184 worker_vm = vlib_mains[i];
1186 vec_add1 (worker_vms, worker_vm);
1192 if (nm->total_enabled_count)
1194 vlib_process_wait_for_event_or_clock (vm, 10.0);
1195 event_type = vlib_process_get_events (vm, &event_data);
1199 vlib_process_wait_for_event (vm);
1200 event_type = vlib_process_get_events (vm, &event_data);
1207 case NAT64_CLEANER_RESCHEDULE:
1210 clib_warning ("unknown event %u", event_type);
1214 for (i = 0; i < vec_len (worker_vms); i++)
1216 worker_vm = worker_vms[i];
1217 vlib_node_set_interrupt_pending (worker_vm,
1218 nat64_expire_worker_walk_node.index);
1226 VLIB_REGISTER_NODE (nat64_expire_walk_node, static) = {
1227 .function = nat64_expire_walk_fn,
1228 .type = VLIB_NODE_TYPE_PROCESS,
1229 .name = "nat64-expire-walk",
1234 * fd.io coding-style-patch-verification: ON
1237 * eval: (c-set-style "gnu")