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 clib_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);
244 nm->total_bibs.name = "total-bibs";
245 nm->total_bibs.stat_segment_name = "/nat64/total-bibs";
246 vlib_validate_simple_counter (&nm->total_bibs, 0);
247 vlib_zero_simple_counter (&nm->total_bibs, 0);
248 nm->total_sessions.name = "total-sessions";
249 nm->total_sessions.stat_segment_name = "/nat64/total-sessions";
250 vlib_validate_simple_counter (&nm->total_sessions, 0);
251 vlib_zero_simple_counter (&nm->total_sessions, 0);
256 static void nat64_free_out_addr_and_port (struct nat64_db_s *db,
257 ip4_address_t * addr, u16 port,
261 nat64_set_hash (u32 bib_buckets, u32 bib_memory_size, u32 st_buckets,
264 nat64_main_t *nm = &nat64_main;
267 nm->bib_buckets = bib_buckets;
268 nm->bib_memory_size = bib_memory_size;
269 nm->st_buckets = st_buckets;
270 nm->st_memory_size = st_memory_size;
273 vec_foreach (db, nm->db)
275 if (nat64_db_init (db, bib_buckets, bib_memory_size, st_buckets,
276 st_memory_size, nat64_free_out_addr_and_port))
277 nat_log_err ("NAT64 DB init failed");
283 nat64_add_del_pool_addr (ip4_address_t * addr, u32 vrf_id, u8 is_add)
285 nat64_main_t *nm = &nat64_main;
286 snat_address_t *a = 0;
287 snat_interface_t *interface;
290 vlib_thread_main_t *tm = vlib_get_thread_main ();
292 /* Check if address already exists */
293 for (i = 0; i < vec_len (nm->addr_pool); i++)
295 if (nm->addr_pool[i].addr.as_u32 == addr->as_u32)
297 a = nm->addr_pool + i;
305 return VNET_API_ERROR_VALUE_EXIST;
307 vec_add2 (nm->addr_pool, a, 1);
312 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
313 FIB_SOURCE_PLUGIN_HI);
314 #define _(N, id, n, s) \
315 clib_bitmap_alloc (a->busy_##n##_port_bitmap, 65535); \
316 a->busy_##n##_ports = 0; \
317 vec_validate_init_empty (a->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
318 foreach_snat_protocol
324 return VNET_API_ERROR_NO_SUCH_ENTRY;
326 if (a->fib_index != ~0)
327 fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP6,
328 FIB_SOURCE_PLUGIN_HI);
329 /* Delete sessions using address */
331 vec_foreach (db, nm->db)
333 nat64_db_free_out_addr (db, &a->addr);
334 vlib_set_simple_counter (&nm->total_bibs, db - nm->db, 0,
335 db->bib.bib_entries_num);
336 vlib_set_simple_counter (&nm->total_sessions, db - nm->db, 0,
337 db->st.st_entries_num);
339 #define _(N, id, n, s) \
340 clib_bitmap_free (a->busy_##n##_port_bitmap);
341 foreach_snat_protocol
344 vec_del1 (nm->addr_pool, i);
347 /* Add/del external address to FIB */
349 pool_foreach (interface, nm->interfaces,
351 if (nat_interface_is_inside(interface))
354 snat_add_del_addr_to_fib (addr, 32, interface->sw_if_index, is_add);
363 nat64_pool_addr_walk (nat64_pool_addr_walk_fn_t fn, void *ctx)
365 nat64_main_t *nm = &nat64_main;
366 snat_address_t *a = 0;
369 vec_foreach (a, nm->addr_pool)
378 nat64_add_interface_address (u32 sw_if_index, int is_add)
380 nat64_main_t *nm = &nat64_main;
381 ip4_main_t *ip4_main = nm->ip4_main;
382 ip4_address_t *first_int_addr;
385 first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0);
387 for (i = 0; i < vec_len (nm->auto_add_sw_if_indices); i++)
389 if (nm->auto_add_sw_if_indices[i] == sw_if_index)
392 return VNET_API_ERROR_VALUE_EXIST;
395 /* if have address remove it */
397 (void) nat64_add_del_pool_addr (first_int_addr, ~0, 0);
399 vec_del1 (nm->auto_add_sw_if_indices, i);
406 return VNET_API_ERROR_NO_SUCH_ENTRY;
408 /* add to the auto-address list */
409 vec_add1 (nm->auto_add_sw_if_indices, sw_if_index);
411 /* If the address is already bound - or static - add it now */
413 (void) nat64_add_del_pool_addr (first_int_addr, ~0, 1);
419 nat64_add_del_interface (u32 sw_if_index, u8 is_inside, u8 is_add)
421 nat64_main_t *nm = &nat64_main;
422 snat_interface_t *interface = 0, *i;
424 const char *feature_name, *arc_name;
426 /* Check if interface already exists */
428 pool_foreach (i, nm->interfaces,
430 if (i->sw_if_index == sw_if_index)
443 pool_get (nm->interfaces, interface);
444 interface->sw_if_index = sw_if_index;
445 interface->flags = 0;
448 interface->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
450 interface->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
452 nm->total_enabled_count++;
453 vlib_process_signal_event (nm->sm->vlib_main,
454 nm->nat64_expire_walk_node_index,
455 NAT64_CLEANER_RESCHEDULE, 0);
461 return VNET_API_ERROR_NO_SUCH_ENTRY;
463 if ((nat_interface_is_inside (interface)
464 && nat_interface_is_outside (interface)))
466 is_inside ? ~NAT_INTERFACE_FLAG_IS_INSIDE :
467 ~NAT_INTERFACE_FLAG_IS_OUTSIDE;
469 pool_put (nm->interfaces, interface);
471 nm->total_enabled_count--;
477 vec_foreach (ap, nm->addr_pool)
478 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, is_add);
482 if (nm->sm->num_workers > 1)
485 is_inside ? "nat64-in2out-handoff" : "nat64-out2in-handoff";
486 if (nm->fq_in2out_index == ~0)
487 nm->fq_in2out_index =
488 vlib_frame_queue_main_init (nat64_in2out_node.index, 0);
489 if (nm->fq_out2in_index == ~0)
490 nm->fq_out2in_index =
491 vlib_frame_queue_main_init (nat64_out2in_node.index, 0);
494 feature_name = is_inside ? "nat64-in2out" : "nat64-out2in";
496 arc_name = is_inside ? "ip6-unicast" : "ip4-unicast";
498 return vnet_feature_enable_disable (arc_name, feature_name, sw_if_index,
503 nat64_interfaces_walk (nat64_interface_walk_fn_t fn, void *ctx)
505 nat64_main_t *nm = &nat64_main;
506 snat_interface_t *i = 0;
509 pool_foreach (i, nm->interfaces,
518 nat64_alloc_out_addr_and_port (u32 fib_index, snat_protocol_t proto,
519 ip4_address_t * addr, u16 * port,
522 nat64_main_t *nm = &nat64_main;
523 snat_main_t *sm = nm->sm;
524 snat_session_key_t k;
525 u32 worker_index = 0;
530 if (sm->num_workers > 1)
531 worker_index = thread_index - sm->first_worker_index;
534 sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k,
535 sm->port_per_thread, worker_index);
540 addr->as_u32 = k.addr.as_u32;
547 nat64_free_out_addr_and_port (struct nat64_db_s *db, ip4_address_t * addr,
548 u16 port, u8 protocol)
550 nat64_main_t *nm = &nat64_main;
553 u32 thread_index = db - nm->db;
554 snat_protocol_t proto = ip_proto_to_snat_proto (protocol);
555 u16 port_host_byte_order = clib_net_to_host_u16 (port);
557 for (i = 0; i < vec_len (nm->addr_pool); i++)
559 a = nm->addr_pool + i;
560 if (addr->as_u32 != a->addr.as_u32)
564 #define _(N, j, n, s) \
565 case SNAT_PROTOCOL_##N: \
566 ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
567 port_host_byte_order) == 1); \
568 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, port, 0); \
569 a->busy_##n##_ports--; \
570 a->busy_##n##_ports_per_thread[thread_index]--; \
572 foreach_snat_protocol
575 nat_log_notice ("unknown protocol");
583 * @brief Add/delete static BIB entry in worker thread.
586 nat64_static_bib_worker_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
589 nat64_main_t *nm = &nat64_main;
590 u32 thread_index = vm->thread_index;
591 nat64_db_t *db = &nm->db[thread_index];
592 nat64_static_bib_to_update_t *static_bib;
593 nat64_db_bib_entry_t *bibe;
597 pool_foreach (static_bib, nm->static_bibs,
599 if ((static_bib->thread_index != thread_index) || (static_bib->done))
602 if (static_bib->is_add)
604 (void) nat64_db_bib_entry_create (db, &static_bib->in_addr,
605 &static_bib->out_addr,
607 static_bib->out_port,
608 static_bib->fib_index,
609 static_bib->proto, 1);
610 vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
611 db->bib.bib_entries_num);
615 addr.as_u64[0] = static_bib->in_addr.as_u64[0];
616 addr.as_u64[1] = static_bib->in_addr.as_u64[1];
617 bibe = nat64_db_bib_entry_find (db, &addr, static_bib->in_port,
619 static_bib->fib_index, 1);
622 nat64_db_bib_entry_free (db, bibe);
623 vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
624 db->bib.bib_entries_num);
625 vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
626 db->st.st_entries_num);
630 static_bib->done = 1;
637 static vlib_node_registration_t nat64_static_bib_worker_node;
640 VLIB_REGISTER_NODE (nat64_static_bib_worker_node, static) = {
641 .function = nat64_static_bib_worker_fn,
642 .type = VLIB_NODE_TYPE_INPUT,
643 .state = VLIB_NODE_STATE_INTERRUPT,
644 .name = "nat64-static-bib-worker",
649 nat64_add_del_static_bib_entry (ip6_address_t * in_addr,
650 ip4_address_t * out_addr, u16 in_port,
651 u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
653 nat64_main_t *nm = &nat64_main;
654 nat64_db_bib_entry_t *bibe;
655 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
656 FIB_SOURCE_PLUGIN_HI);
657 snat_protocol_t p = ip_proto_to_snat_proto (proto);
661 u32 thread_index = 0;
663 nat64_static_bib_to_update_t *static_bib;
664 vlib_main_t *worker_vm;
665 u32 *to_be_free = 0, *index;
667 if (nm->sm->num_workers > 1)
669 thread_index = nat64_get_worker_in2out (in_addr);
670 db = &nm->db[thread_index];
673 db = &nm->db[nm->sm->num_workers];
675 addr.as_u64[0] = in_addr->as_u64[0];
676 addr.as_u64[1] = in_addr->as_u64[1];
678 nat64_db_bib_entry_find (db, &addr, clib_host_to_net_u16 (in_port),
679 proto, fib_index, 1);
684 return VNET_API_ERROR_VALUE_EXIST;
686 /* outside port must be assigned to same thread as internall address */
687 if ((out_port > 1024) && (nm->sm->num_workers > 1))
689 if (thread_index != ((out_port - 1024) / nm->sm->port_per_thread))
690 return VNET_API_ERROR_INVALID_VALUE_2;
693 for (i = 0; i < vec_len (nm->addr_pool); i++)
695 a = nm->addr_pool + i;
696 if (out_addr->as_u32 != a->addr.as_u32)
700 #define _(N, j, n, s) \
701 case SNAT_PROTOCOL_##N: \
702 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
704 return VNET_API_ERROR_INVALID_VALUE; \
705 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
707 if (out_port > 1024) \
709 a->busy_##n##_ports++; \
710 a->busy_##n##_ports_per_thread[thread_index]++; \
713 foreach_snat_protocol
716 clib_memset (&addr, 0, sizeof (addr));
717 addr.ip4.as_u32 = out_addr->as_u32;
718 if (nat64_db_bib_entry_find (db, &addr, 0, proto, fib_index, 0))
719 return VNET_API_ERROR_INVALID_VALUE;
723 if (!nm->sm->num_workers)
726 nat64_db_bib_entry_create (db, in_addr, out_addr,
727 clib_host_to_net_u16 (in_port),
728 clib_host_to_net_u16 (out_port),
729 fib_index, proto, 1);
731 return VNET_API_ERROR_UNSPECIFIED;
733 vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
734 db->bib.bib_entries_num);
740 return VNET_API_ERROR_NO_SUCH_ENTRY;
742 if (!nm->sm->num_workers)
744 nat64_db_bib_entry_free (db, bibe);
745 vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
746 db->bib.bib_entries_num);
750 if (nm->sm->num_workers)
753 pool_foreach (static_bib, nm->static_bibs,
755 if (static_bib->done)
756 vec_add1 (to_be_free, static_bib - nm->static_bibs);
758 vec_foreach (index, to_be_free)
759 pool_put_index (nm->static_bibs, index[0]);
761 vec_free (to_be_free);
762 pool_get (nm->static_bibs, static_bib);
763 static_bib->in_addr.as_u64[0] = in_addr->as_u64[0];
764 static_bib->in_addr.as_u64[1] = in_addr->as_u64[1];
765 static_bib->in_port = clib_host_to_net_u16 (in_port);
766 static_bib->out_addr.as_u32 = out_addr->as_u32;
767 static_bib->out_port = clib_host_to_net_u16 (out_port);
768 static_bib->fib_index = fib_index;
769 static_bib->proto = proto;
770 static_bib->is_add = is_add;
771 static_bib->thread_index = thread_index;
772 static_bib->done = 0;
773 worker_vm = vlib_mains[thread_index];
775 vlib_node_set_interrupt_pending (worker_vm,
776 nat64_static_bib_worker_node.index);
778 return VNET_API_ERROR_UNSPECIFIED;
785 nat64_set_udp_timeout (u32 timeout)
787 nat64_main_t *nm = &nat64_main;
790 nm->udp_timeout = SNAT_UDP_TIMEOUT;
792 nm->udp_timeout = timeout;
798 nat64_get_udp_timeout (void)
800 nat64_main_t *nm = &nat64_main;
802 return nm->udp_timeout;
806 nat64_set_icmp_timeout (u32 timeout)
808 nat64_main_t *nm = &nat64_main;
811 nm->icmp_timeout = SNAT_ICMP_TIMEOUT;
813 nm->icmp_timeout = timeout;
819 nat64_get_icmp_timeout (void)
821 nat64_main_t *nm = &nat64_main;
823 return nm->icmp_timeout;
827 nat64_set_tcp_timeouts (u32 trans, u32 est)
829 nat64_main_t *nm = &nat64_main;
832 nm->tcp_trans_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
834 nm->tcp_trans_timeout = trans;
837 nm->tcp_est_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
839 nm->tcp_est_timeout = est;
845 nat64_get_tcp_trans_timeout (void)
847 nat64_main_t *nm = &nat64_main;
849 return nm->tcp_trans_timeout;
853 nat64_get_tcp_est_timeout (void)
855 nat64_main_t *nm = &nat64_main;
857 return nm->tcp_est_timeout;
861 nat64_session_reset_timeout (nat64_db_st_entry_t * ste, vlib_main_t * vm)
863 nat64_main_t *nm = &nat64_main;
864 u32 now = (u32) vlib_time_now (vm);
866 switch (ip_proto_to_snat_proto (ste->proto))
868 case SNAT_PROTOCOL_ICMP:
869 ste->expire = now + nm->icmp_timeout;
871 case SNAT_PROTOCOL_TCP:
873 switch (ste->tcp_state)
875 case NAT64_TCP_STATE_V4_INIT:
876 case NAT64_TCP_STATE_V6_INIT:
877 case NAT64_TCP_STATE_V4_FIN_RCV:
878 case NAT64_TCP_STATE_V6_FIN_RCV:
879 case NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV:
880 case NAT64_TCP_STATE_TRANS:
881 ste->expire = now + nm->tcp_trans_timeout;
883 case NAT64_TCP_STATE_ESTABLISHED:
884 ste->expire = now + nm->tcp_est_timeout;
890 case SNAT_PROTOCOL_UDP:
891 ste->expire = now + nm->udp_timeout;
894 ste->expire = now + nm->udp_timeout;
900 nat64_tcp_session_set_state (nat64_db_st_entry_t * ste, tcp_header_t * tcp,
903 switch (ste->tcp_state)
905 case NAT64_TCP_STATE_CLOSED:
907 if (tcp->flags & TCP_FLAG_SYN)
910 ste->tcp_state = NAT64_TCP_STATE_V6_INIT;
912 ste->tcp_state = NAT64_TCP_STATE_V4_INIT;
916 case NAT64_TCP_STATE_V4_INIT:
918 if (is_ip6 && (tcp->flags & TCP_FLAG_SYN))
919 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
922 case NAT64_TCP_STATE_V6_INIT:
924 if (!is_ip6 && (tcp->flags & TCP_FLAG_SYN))
925 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
928 case NAT64_TCP_STATE_ESTABLISHED:
930 if (tcp->flags & TCP_FLAG_FIN)
933 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_RCV;
935 ste->tcp_state = NAT64_TCP_STATE_V4_FIN_RCV;
937 else if (tcp->flags & TCP_FLAG_RST)
939 ste->tcp_state = NAT64_TCP_STATE_TRANS;
943 case NAT64_TCP_STATE_V4_FIN_RCV:
945 if (is_ip6 && (tcp->flags & TCP_FLAG_FIN))
946 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
949 case NAT64_TCP_STATE_V6_FIN_RCV:
951 if (!is_ip6 && (tcp->flags & TCP_FLAG_FIN))
952 ste->tcp_state = NAT64_TCP_STATE_V6_FIN_V4_FIN_RCV;
955 case NAT64_TCP_STATE_TRANS:
957 if (!(tcp->flags & TCP_FLAG_RST))
958 ste->tcp_state = NAT64_TCP_STATE_ESTABLISHED;
967 nat64_add_del_prefix (ip6_address_t * prefix, u8 plen, u32 vrf_id, u8 is_add)
969 nat64_main_t *nm = &nat64_main;
970 nat64_prefix_t *p = 0;
973 /* Verify prefix length */
974 if (plen != 32 && plen != 40 && plen != 48 && plen != 56 && plen != 64
976 return VNET_API_ERROR_INVALID_VALUE;
978 /* Check if tenant already have prefix */
979 for (i = 0; i < vec_len (nm->pref64); i++)
981 if (nm->pref64[i].vrf_id == vrf_id)
992 vec_add2 (nm->pref64, p, 1);
994 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id,
995 FIB_SOURCE_PLUGIN_HI);
999 p->prefix.as_u64[0] = prefix->as_u64[0];
1000 p->prefix.as_u64[1] = prefix->as_u64[1];
1006 return VNET_API_ERROR_NO_SUCH_ENTRY;
1008 vec_del1 (nm->pref64, i);
1015 nat64_prefix_walk (nat64_prefix_walk_fn_t fn, void *ctx)
1017 nat64_main_t *nm = &nat64_main;
1018 nat64_prefix_t *p = 0;
1021 vec_foreach (p, nm->pref64)
1030 nat64_compose_ip6 (ip6_address_t * ip6, ip4_address_t * ip4, u32 fib_index)
1032 nat64_main_t *nm = &nat64_main;
1033 nat64_prefix_t *p, *gp = 0, *prefix = 0;
1036 vec_foreach (p, nm->pref64)
1038 if (p->fib_index == fib_index)
1044 if (p->fib_index == 0)
1054 clib_memcpy_fast (ip6, &p->prefix, sizeof (ip6_address_t));
1058 ip6->as_u32[1] = ip4->as_u32;
1061 ip6->as_u8[5] = ip4->as_u8[0];
1062 ip6->as_u8[6] = ip4->as_u8[1];
1063 ip6->as_u8[7] = ip4->as_u8[2];
1064 ip6->as_u8[9] = ip4->as_u8[3];
1067 ip6->as_u8[6] = ip4->as_u8[0];
1068 ip6->as_u8[7] = ip4->as_u8[1];
1069 ip6->as_u8[9] = ip4->as_u8[2];
1070 ip6->as_u8[10] = ip4->as_u8[3];
1073 ip6->as_u8[7] = ip4->as_u8[0];
1074 ip6->as_u8[9] = ip4->as_u8[1];
1075 ip6->as_u8[10] = ip4->as_u8[2];
1076 ip6->as_u8[11] = ip4->as_u8[3];
1079 ip6->as_u8[9] = ip4->as_u8[0];
1080 ip6->as_u8[10] = ip4->as_u8[1];
1081 ip6->as_u8[11] = ip4->as_u8[2];
1082 ip6->as_u8[12] = ip4->as_u8[3];
1085 ip6->as_u32[3] = ip4->as_u32;
1088 nat_log_notice ("invalid prefix length");
1094 clib_memcpy_fast (ip6, well_known_prefix, sizeof (ip6_address_t));
1095 ip6->as_u32[3] = ip4->as_u32;
1100 nat64_extract_ip4 (ip6_address_t * ip6, ip4_address_t * ip4, u32 fib_index)
1102 nat64_main_t *nm = &nat64_main;
1103 nat64_prefix_t *p, *gp = 0;
1107 vec_foreach (p, nm->pref64)
1109 if (p->fib_index == fib_index)
1131 ip4->as_u32 = ip6->as_u32[1];
1134 ip4->as_u8[0] = ip6->as_u8[5];
1135 ip4->as_u8[1] = ip6->as_u8[6];
1136 ip4->as_u8[2] = ip6->as_u8[7];
1137 ip4->as_u8[3] = ip6->as_u8[9];
1140 ip4->as_u8[0] = ip6->as_u8[6];
1141 ip4->as_u8[1] = ip6->as_u8[7];
1142 ip4->as_u8[2] = ip6->as_u8[9];
1143 ip4->as_u8[3] = ip6->as_u8[10];
1146 ip4->as_u8[0] = ip6->as_u8[7];
1147 ip4->as_u8[1] = ip6->as_u8[9];
1148 ip4->as_u8[2] = ip6->as_u8[10];
1149 ip4->as_u8[3] = ip6->as_u8[11];
1152 ip4->as_u8[0] = ip6->as_u8[9];
1153 ip4->as_u8[1] = ip6->as_u8[10];
1154 ip4->as_u8[2] = ip6->as_u8[11];
1155 ip4->as_u8[3] = ip6->as_u8[12];
1158 ip4->as_u32 = ip6->as_u32[3];
1161 nat_log_notice ("invalid prefix length");
1167 * @brief Per worker process checking expire time for NAT64 sessions.
1170 nat64_expire_worker_walk_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
1173 nat64_main_t *nm = &nat64_main;
1174 u32 thread_index = vm->thread_index;
1175 nat64_db_t *db = &nm->db[thread_index];
1176 u32 now = (u32) vlib_time_now (vm);
1178 nad64_db_st_free_expired (db, now);
1179 vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
1180 db->bib.bib_entries_num);
1181 vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
1182 db->st.st_entries_num);
1187 static vlib_node_registration_t nat64_expire_worker_walk_node;
1190 VLIB_REGISTER_NODE (nat64_expire_worker_walk_node, static) = {
1191 .function = nat64_expire_worker_walk_fn,
1192 .type = VLIB_NODE_TYPE_INPUT,
1193 .state = VLIB_NODE_STATE_INTERRUPT,
1194 .name = "nat64-expire-worker-walk",
1198 static vlib_node_registration_t nat64_expire_walk_node;
1201 * @brief Centralized process to drive per worker expire walk.
1204 nat64_expire_walk_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
1207 nat64_main_t *nm = &nat64_main;
1208 vlib_main_t **worker_vms = 0, *worker_vm;
1210 uword event_type, *event_data = 0;
1212 nm->nat64_expire_walk_node_index = nat64_expire_walk_node.index;
1214 if (vec_len (vlib_mains) == 0)
1215 vec_add1 (worker_vms, vm);
1218 for (i = 0; i < vec_len (vlib_mains); i++)
1220 worker_vm = vlib_mains[i];
1222 vec_add1 (worker_vms, worker_vm);
1228 if (nm->total_enabled_count)
1230 vlib_process_wait_for_event_or_clock (vm, 10.0);
1231 event_type = vlib_process_get_events (vm, &event_data);
1235 vlib_process_wait_for_event (vm);
1236 event_type = vlib_process_get_events (vm, &event_data);
1243 case NAT64_CLEANER_RESCHEDULE:
1246 nat_log_notice ("unknown event %u", event_type);
1250 for (i = 0; i < vec_len (worker_vms); i++)
1252 worker_vm = worker_vms[i];
1253 vlib_node_set_interrupt_pending (worker_vm,
1254 nat64_expire_worker_walk_node.index);
1262 VLIB_REGISTER_NODE (nat64_expire_walk_node, static) = {
1263 .function = nat64_expire_walk_fn,
1264 .type = VLIB_NODE_TYPE_PROCESS,
1265 .name = "nat64-expire-walk",
1270 * fd.io coding-style-patch-verification: ON
1273 * eval: (c-set-style "gnu")