2 * snat.c - simple nat plugin
4 * Copyright (c) 2016 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/vnet.h>
19 #include <vnet/ip/ip.h>
20 #include <vnet/ip/ip4.h>
21 #include <vnet/plugin/plugin.h>
23 #include <nat/nat_dpo.h>
24 #include <nat/nat_ipfix_logging.h>
25 #include <nat/nat_det.h>
26 #include <nat/nat64.h>
27 #include <nat/nat66.h>
28 #include <nat/dslite.h>
29 #include <nat/nat_reass.h>
30 #include <vnet/fib/fib_table.h>
31 #include <vnet/fib/ip4_fib.h>
33 #include <vpp/app/version.h>
35 snat_main_t snat_main;
38 /* Hook up input features */
39 VNET_FEATURE_INIT (ip4_snat_in2out, static) = {
40 .arc_name = "ip4-unicast",
41 .node_name = "nat44-in2out",
42 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
44 VNET_FEATURE_INIT (ip4_snat_out2in, static) = {
45 .arc_name = "ip4-unicast",
46 .node_name = "nat44-out2in",
47 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
49 VNET_FEATURE_INIT (ip4_nat_classify, static) = {
50 .arc_name = "ip4-unicast",
51 .node_name = "nat44-classify",
52 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
54 VNET_FEATURE_INIT (ip4_snat_det_in2out, static) = {
55 .arc_name = "ip4-unicast",
56 .node_name = "nat44-det-in2out",
57 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
59 VNET_FEATURE_INIT (ip4_snat_det_out2in, static) = {
60 .arc_name = "ip4-unicast",
61 .node_name = "nat44-det-out2in",
62 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
64 VNET_FEATURE_INIT (ip4_nat_det_classify, static) = {
65 .arc_name = "ip4-unicast",
66 .node_name = "nat44-det-classify",
67 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
69 VNET_FEATURE_INIT (ip4_snat_in2out_worker_handoff, static) = {
70 .arc_name = "ip4-unicast",
71 .node_name = "nat44-in2out-worker-handoff",
72 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
74 VNET_FEATURE_INIT (ip4_snat_out2in_worker_handoff, static) = {
75 .arc_name = "ip4-unicast",
76 .node_name = "nat44-out2in-worker-handoff",
77 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
79 VNET_FEATURE_INIT (ip4_nat_handoff_classify, static) = {
80 .arc_name = "ip4-unicast",
81 .node_name = "nat44-handoff-classify",
82 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
84 VNET_FEATURE_INIT (ip4_snat_in2out_fast, static) = {
85 .arc_name = "ip4-unicast",
86 .node_name = "nat44-in2out-fast",
87 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
89 VNET_FEATURE_INIT (ip4_snat_out2in_fast, static) = {
90 .arc_name = "ip4-unicast",
91 .node_name = "nat44-out2in-fast",
92 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
94 VNET_FEATURE_INIT (ip4_snat_hairpin_dst, static) = {
95 .arc_name = "ip4-unicast",
96 .node_name = "nat44-hairpin-dst",
97 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
100 /* Hook up output features */
101 VNET_FEATURE_INIT (ip4_snat_in2out_output, static) = {
102 .arc_name = "ip4-output",
103 .node_name = "nat44-in2out-output",
104 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
106 VNET_FEATURE_INIT (ip4_snat_in2out_output_worker_handoff, static) = {
107 .arc_name = "ip4-output",
108 .node_name = "nat44-in2out-output-worker-handoff",
109 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
111 VNET_FEATURE_INIT (ip4_snat_hairpin_src, static) = {
112 .arc_name = "ip4-output",
113 .node_name = "nat44-hairpin-src",
114 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
117 /* Hook up ip4-local features */
118 VNET_FEATURE_INIT (ip4_nat_hairpinning, static) =
120 .arc_name = "ip4-local",
121 .node_name = "nat44-hairpinning",
122 .runs_before = VNET_FEATURES("ip4-local-end-of-arc"),
127 VLIB_PLUGIN_REGISTER () = {
128 .version = VPP_BUILD_VER,
129 .description = "Network Address Translation",
133 vlib_node_registration_t nat44_classify_node;
134 vlib_node_registration_t nat44_det_classify_node;
135 vlib_node_registration_t nat44_handoff_classify_node;
138 NAT44_CLASSIFY_NEXT_IN2OUT,
139 NAT44_CLASSIFY_NEXT_OUT2IN,
140 NAT44_CLASSIFY_N_NEXT,
141 } nat44_classify_next_t;
144 nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index)
146 snat_session_key_t key;
147 clib_bihash_kv_8_8_t kv;
148 nat_ed_ses_key_t ed_key;
149 clib_bihash_kv_16_8_t ed_kv;
152 snat_main_per_thread_data_t *tsm =
153 vec_elt_at_index (sm->per_thread_data, thread_index);
155 if (is_fwd_bypass_session (s))
157 ed_key.l_addr = s->in2out.addr;
158 ed_key.r_addr = s->ext_host_addr;
159 ed_key.l_port = s->in2out.port;
160 ed_key.r_port = s->ext_host_port;
161 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
162 ed_key.fib_index = 0;
163 ed_kv.key[0] = ed_key.as_u64[0];
164 ed_kv.key[1] = ed_key.as_u64[1];
165 if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &ed_kv, 0))
166 clib_warning ("in2out_ed key del failed");
170 /* Endpoint dependent session lookup tables */
171 if (is_ed_session (s))
173 ed_key.l_addr = s->out2in.addr;
174 ed_key.r_addr = s->ext_host_addr;
175 ed_key.fib_index = s->out2in.fib_index;
176 if (snat_is_unk_proto_session (s))
178 ed_key.proto = s->in2out.port;
184 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
185 ed_key.l_port = s->out2in.port;
186 ed_key.r_port = s->ext_host_port;
188 ed_kv.key[0] = ed_key.as_u64[0];
189 ed_kv.key[1] = ed_key.as_u64[1];
190 if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &ed_kv, 0))
191 clib_warning ("out2in_ed key del failed");
193 ed_key.l_addr = s->in2out.addr;
194 ed_key.fib_index = s->in2out.fib_index;
195 if (!snat_is_unk_proto_session (s))
196 ed_key.l_port = s->in2out.port;
197 if (is_twice_nat_session (s))
199 ed_key.r_addr = s->ext_host_nat_addr;
200 ed_key.r_port = s->ext_host_nat_port;
202 ed_kv.key[0] = ed_key.as_u64[0];
203 ed_kv.key[1] = ed_key.as_u64[1];
204 if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &ed_kv, 0))
205 clib_warning ("in2out_ed key del failed");
208 if (snat_is_unk_proto_session (s))
212 snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
213 s->out2in.addr.as_u32,
217 s->in2out.fib_index);
219 /* Twice NAT address and port for external host */
220 if (is_twice_nat_session (s))
222 for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
224 key.protocol = s->in2out.protocol;
225 key.port = s->ext_host_nat_port;
226 a = sm->twice_nat_addresses + i;
227 if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
229 snat_free_outside_address_and_port (sm->twice_nat_addresses,
230 thread_index, &key, i);
236 if (is_ed_session (s))
239 /* Session lookup tables */
240 kv.key = s->in2out.as_u64;
241 if (clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 0))
242 clib_warning ("in2out key del failed");
243 kv.key = s->out2in.as_u64;
244 if (clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 0))
245 clib_warning ("out2in key del failed");
247 if (snat_is_session_static (s))
250 if (s->outside_address_index != ~0)
251 snat_free_outside_address_and_port (sm->addresses, thread_index,
252 &s->out2in, s->outside_address_index);
256 nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr, u32 fib_index,
260 snat_user_key_t user_key;
261 clib_bihash_kv_8_8_t kv, value;
262 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
263 dlist_elt_t * per_user_list_head_elt;
265 user_key.addr.as_u32 = addr->as_u32;
266 user_key.fib_index = fib_index;
267 kv.key = user_key.as_u64;
269 /* Ever heard of the "user" = src ip4 address before? */
270 if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
272 /* no, make a new one */
273 pool_get (tsm->users, u);
274 memset (u, 0, sizeof (*u));
275 u->addr.as_u32 = addr->as_u32;
276 u->fib_index = fib_index;
278 pool_get (tsm->list_pool, per_user_list_head_elt);
280 u->sessions_per_user_list_head_index = per_user_list_head_elt -
283 clib_dlist_init (tsm->list_pool, u->sessions_per_user_list_head_index);
285 kv.value = u - tsm->users;
288 if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1))
289 clib_warning ("user_hash keay add failed");
293 u = pool_elt_at_index (tsm->users, value.value);
300 nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u, u32 thread_index)
303 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
304 u32 oldest_per_user_translation_list_index, session_index;
305 dlist_elt_t * oldest_per_user_translation_list_elt;
306 dlist_elt_t * per_user_translation_list_elt;
308 /* Over quota? Recycle the least recently used translation */
309 if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
311 oldest_per_user_translation_list_index =
312 clib_dlist_remove_head (tsm->list_pool,
313 u->sessions_per_user_list_head_index);
315 ASSERT (oldest_per_user_translation_list_index != ~0);
317 /* Add it back to the end of the LRU list */
318 clib_dlist_addtail (tsm->list_pool,
319 u->sessions_per_user_list_head_index,
320 oldest_per_user_translation_list_index);
321 /* Get the list element */
322 oldest_per_user_translation_list_elt =
323 pool_elt_at_index (tsm->list_pool,
324 oldest_per_user_translation_list_index);
326 /* Get the session index from the list element */
327 session_index = oldest_per_user_translation_list_elt->value;
329 /* Get the session */
330 s = pool_elt_at_index (tsm->sessions, session_index);
331 nat_free_session_data (sm, s, thread_index);
332 if (snat_is_session_static(s))
333 u->nstaticsessions--;
336 s->outside_address_index = ~0;
341 s->ext_host_addr.as_u32 = 0;
342 s->ext_host_port = 0;
343 s->ext_host_nat_addr.as_u32 = 0;
344 s->ext_host_nat_port = 0;
348 pool_get (tsm->sessions, s);
349 memset (s, 0, sizeof (*s));
350 s->outside_address_index = ~0;
352 /* Create list elts */
353 pool_get (tsm->list_pool, per_user_translation_list_elt);
354 clib_dlist_init (tsm->list_pool,
355 per_user_translation_list_elt - tsm->list_pool);
357 per_user_translation_list_elt->value = s - tsm->sessions;
358 s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
359 s->per_user_list_head_index = u->sessions_per_user_list_head_index;
361 clib_dlist_addtail (tsm->list_pool,
362 s->per_user_list_head_index,
363 per_user_translation_list_elt - tsm->list_pool);
370 nat44_classify_node_fn_inline (vlib_main_t * vm,
371 vlib_node_runtime_t * node,
372 vlib_frame_t * frame)
374 u32 n_left_from, * from, * to_next;
375 nat44_classify_next_t next_index;
376 snat_main_t *sm = &snat_main;
377 snat_static_mapping_t *m;
379 from = vlib_frame_vector_args (frame);
380 n_left_from = frame->n_vectors;
381 next_index = node->cached_next_index;
383 while (n_left_from > 0)
387 vlib_get_next_frame (vm, node, next_index,
388 to_next, n_left_to_next);
390 while (n_left_from > 0 && n_left_to_next > 0)
394 u32 next0 = NAT44_CLASSIFY_NEXT_IN2OUT;
397 snat_session_key_t m_key0;
398 clib_bihash_kv_8_8_t kv0, value0;
400 /* speculatively enqueue b0 to the current next frame */
408 b0 = vlib_get_buffer (vm, bi0);
409 ip0 = vlib_buffer_get_current (b0);
411 vec_foreach (ap, sm->addresses)
413 if (ip0->dst_address.as_u32 == ap->addr.as_u32)
415 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
420 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
422 m_key0.addr = ip0->dst_address;
425 m_key0.fib_index = sm->outside_fib_index;
426 kv0.key = m_key0.as_u64;
427 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv0, &value0))
429 m = pool_elt_at_index (sm->static_mappings, value0.value);
430 if (m->local_addr.as_u32 != m->external_addr.as_u32)
431 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
434 udp_header_t * udp0 = ip4_next_header (ip0);
435 m_key0.port = clib_net_to_host_u16 (udp0->dst_port);
436 m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
437 kv0.key = m_key0.as_u64;
438 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv0, &value0))
440 m = pool_elt_at_index (sm->static_mappings, value0.value);
441 if (m->local_addr.as_u32 != m->external_addr.as_u32)
442 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
447 /* verify speculative enqueue, maybe switch current next frame */
448 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
449 to_next, n_left_to_next,
453 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
456 return frame->n_vectors;
460 nat44_classify_node_fn (vlib_main_t * vm,
461 vlib_node_runtime_t * node,
462 vlib_frame_t * frame)
464 return nat44_classify_node_fn_inline (vm, node, frame);
467 VLIB_REGISTER_NODE (nat44_classify_node) = {
468 .function = nat44_classify_node_fn,
469 .name = "nat44-classify",
470 .vector_size = sizeof (u32),
471 .type = VLIB_NODE_TYPE_INTERNAL,
472 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
474 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out",
475 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in",
479 VLIB_NODE_FUNCTION_MULTIARCH (nat44_classify_node,
480 nat44_classify_node_fn);
483 nat44_det_classify_node_fn (vlib_main_t * vm,
484 vlib_node_runtime_t * node,
485 vlib_frame_t * frame)
487 return nat44_classify_node_fn_inline (vm, node, frame);
490 VLIB_REGISTER_NODE (nat44_det_classify_node) = {
491 .function = nat44_det_classify_node_fn,
492 .name = "nat44-det-classify",
493 .vector_size = sizeof (u32),
494 .type = VLIB_NODE_TYPE_INTERNAL,
495 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
497 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-det-in2out",
498 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-det-out2in",
502 VLIB_NODE_FUNCTION_MULTIARCH (nat44_det_classify_node,
503 nat44_det_classify_node_fn);
506 nat44_handoff_classify_node_fn (vlib_main_t * vm,
507 vlib_node_runtime_t * node,
508 vlib_frame_t * frame)
510 return nat44_classify_node_fn_inline (vm, node, frame);
513 VLIB_REGISTER_NODE (nat44_handoff_classify_node) = {
514 .function = nat44_handoff_classify_node_fn,
515 .name = "nat44-handoff-classify",
516 .vector_size = sizeof (u32),
517 .type = VLIB_NODE_TYPE_INTERNAL,
518 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
520 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out-worker-handoff",
521 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in-worker-handoff",
525 VLIB_NODE_FUNCTION_MULTIARCH (nat44_handoff_classify_node,
526 nat44_handoff_classify_node_fn);
529 * @brief Add/del NAT address to FIB.
531 * Add the external NAT address to the FIB as receive entries. This ensures
532 * that VPP will reply to ARP for this address and we don't need to enable
533 * proxy ARP on the outside interface.
535 * @param addr IPv4 address.
536 * @param plen address prefix length
537 * @param sw_if_index Interface.
538 * @param is_add If 0 delete, otherwise add.
541 snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index,
544 fib_prefix_t prefix = {
546 .fp_proto = FIB_PROTOCOL_IP4,
548 .ip4.as_u32 = addr->as_u32,
551 u32 fib_index = ip4_fib_table_get_index_for_sw_if_index(sw_if_index);
554 fib_table_entry_update_one_path(fib_index,
556 FIB_SOURCE_PLUGIN_LOW,
557 (FIB_ENTRY_FLAG_CONNECTED |
558 FIB_ENTRY_FLAG_LOCAL |
559 FIB_ENTRY_FLAG_EXCLUSIVE),
566 FIB_ROUTE_PATH_FLAG_NONE);
568 fib_table_entry_delete(fib_index,
570 FIB_SOURCE_PLUGIN_LOW);
573 void snat_add_address (snat_main_t *sm, ip4_address_t *addr, u32 vrf_id,
578 vlib_thread_main_t *tm = vlib_get_thread_main ();
580 /* Check if address already exists */
581 vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses)
583 if (ap->addr.as_u32 == addr->as_u32)
588 vec_add2 (sm->twice_nat_addresses, ap, 1);
590 vec_add2 (sm->addresses, ap, 1);
595 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
596 FIB_SOURCE_PLUGIN_LOW);
599 #define _(N, i, n, s) \
600 clib_bitmap_alloc (ap->busy_##n##_port_bitmap, 65535); \
601 ap->busy_##n##_ports = 0; \
602 vec_validate_init_empty (ap->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
603 foreach_snat_protocol
609 /* Add external address to FIB */
610 pool_foreach (i, sm->interfaces,
612 if (nat_interface_is_inside(i) || sm->out2in_dpo)
615 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
618 pool_foreach (i, sm->output_feature_interfaces,
620 if (nat_interface_is_inside(i) || sm->out2in_dpo)
623 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
628 static int is_snat_address_used_in_static_mapping (snat_main_t *sm,
631 snat_static_mapping_t *m;
632 pool_foreach (m, sm->static_mappings,
634 if (m->external_addr.as_u32 == addr.as_u32)
641 void increment_v4_address (ip4_address_t * a)
645 v = clib_net_to_host_u32(a->as_u32) + 1;
646 a->as_u32 = clib_host_to_net_u32(v);
650 snat_add_static_mapping_when_resolved (snat_main_t * sm,
651 ip4_address_t l_addr,
656 snat_protocol_t proto,
661 snat_static_map_resolve_t *rp;
663 vec_add2 (sm->to_resolve, rp, 1);
664 rp->l_addr.as_u32 = l_addr.as_u32;
666 rp->sw_if_index = sw_if_index;
670 rp->addr_only = addr_only;
672 rp->tag = vec_dup (tag);
676 * @brief Add static mapping.
678 * Create static mapping between local addr+port and external addr+port.
680 * @param l_addr Local IPv4 address.
681 * @param e_addr External IPv4 address.
682 * @param l_port Local port number.
683 * @param e_port External port number.
684 * @param vrf_id VRF ID.
685 * @param addr_only If 0 address port and pair mapping, otherwise address only.
686 * @param sw_if_index External port instead of specific IP address.
687 * @param is_add If 0 delete static mapping, otherwise add.
688 * @param twice_nat If value is TWICE_NAT then translate external host address
690 * If value is TWICE_NAT_SELF then translate external host
691 * address and port whenever external host address equals
692 * local address of internal host.
693 * @param out2in_only If 1 rule match only out2in direction
694 * @param tag - opaque string tag
698 int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr,
699 u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
700 u32 sw_if_index, snat_protocol_t proto, int is_add,
701 twice_nat_type_t twice_nat, u8 out2in_only,
704 snat_main_t * sm = &snat_main;
705 snat_static_mapping_t *m;
706 snat_session_key_t m_key;
707 clib_bihash_kv_8_8_t kv, value;
708 snat_address_t *a = 0;
711 snat_interface_t *interface;
713 snat_main_per_thread_data_t *tsm;
714 snat_user_key_t u_key;
716 dlist_elt_t * head, * elt;
717 u32 elt_index, head_index;
721 snat_static_map_resolve_t *rp, *rp_match = 0;
723 /* If the external address is a specific interface address */
724 if (sw_if_index != ~0)
726 ip4_address_t * first_int_addr;
728 for (i = 0; i < vec_len (sm->to_resolve); i++)
730 rp = sm->to_resolve + i;
731 if (rp->sw_if_index != sw_if_index &&
732 rp->l_addr.as_u32 != l_addr.as_u32 &&
733 rp->vrf_id != vrf_id && rp->addr_only != addr_only)
738 if (rp->l_port != l_port && rp->e_port != e_port && rp->proto != proto)
746 /* Might be already set... */
747 first_int_addr = ip4_interface_first_address
748 (sm->ip4_main, sw_if_index, 0 /* just want the address*/);
753 return VNET_API_ERROR_VALUE_EXIST;
755 snat_add_static_mapping_when_resolved
756 (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
757 addr_only, is_add, tag);
759 /* DHCP resolution required? */
760 if (first_int_addr == 0)
766 e_addr.as_u32 = first_int_addr->as_u32;
767 /* Identity mapping? */
768 if (l_addr.as_u32 == 0)
769 l_addr.as_u32 = e_addr.as_u32;
775 return VNET_API_ERROR_NO_SUCH_ENTRY;
777 vec_del1 (sm->to_resolve, i);
781 e_addr.as_u32 = first_int_addr->as_u32;
782 /* Identity mapping? */
783 if (l_addr.as_u32 == 0)
784 l_addr.as_u32 = e_addr.as_u32;
792 m_key.port = addr_only ? 0 : e_port;
793 m_key.protocol = addr_only ? 0 : proto;
794 m_key.fib_index = sm->outside_fib_index;
795 kv.key = m_key.as_u64;
796 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
799 m = pool_elt_at_index (sm->static_mappings, value.value);
804 return VNET_API_ERROR_VALUE_EXIST;
806 if (twice_nat && addr_only)
807 return VNET_API_ERROR_UNSUPPORTED;
809 /* Convert VRF id to FIB index */
812 p = hash_get (sm->ip4_main->fib_index_by_table_id, vrf_id);
814 return VNET_API_ERROR_NO_SUCH_FIB;
817 /* If not specified use inside VRF id from SNAT plugin startup config */
820 fib_index = sm->inside_fib_index;
821 vrf_id = sm->inside_vrf_id;
827 m_key.port = addr_only ? 0 : l_port;
828 m_key.protocol = addr_only ? 0 : proto;
829 m_key.fib_index = fib_index;
830 kv.key = m_key.as_u64;
831 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
832 return VNET_API_ERROR_VALUE_EXIST;
835 /* Find external address in allocated addresses and reserve port for
836 address and port pair mapping when dynamic translations enabled */
837 if (!(addr_only || sm->static_mapping_only || out2in_only))
839 for (i = 0; i < vec_len (sm->addresses); i++)
841 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
843 a = sm->addresses + i;
844 /* External port must be unused */
847 #define _(N, j, n, s) \
848 case SNAT_PROTOCOL_##N: \
849 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
850 return VNET_API_ERROR_INVALID_VALUE; \
851 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
854 a->busy_##n##_ports++; \
855 a->busy_##n##_ports_per_thread[(e_port - 1024) / sm->port_per_thread]++; \
858 foreach_snat_protocol
861 clib_warning("unknown_protocol");
862 return VNET_API_ERROR_INVALID_VALUE_2;
867 /* External address must be allocated */
868 if (!a && (l_addr.as_u32 != e_addr.as_u32))
870 if (sw_if_index != ~0)
872 for (i = 0; i < vec_len (sm->to_resolve); i++)
874 rp = sm->to_resolve + i;
877 if (rp->sw_if_index != sw_if_index &&
878 rp->l_addr.as_u32 != l_addr.as_u32 &&
879 rp->vrf_id != vrf_id && rp->l_port != l_port &&
880 rp->e_port != e_port && rp->proto != proto)
883 vec_del1 (sm->to_resolve, i);
887 return VNET_API_ERROR_NO_SUCH_ENTRY;
891 pool_get (sm->static_mappings, m);
892 memset (m, 0, sizeof (*m));
893 m->tag = vec_dup (tag);
894 m->local_addr = l_addr;
895 m->external_addr = e_addr;
896 m->addr_only = addr_only;
898 m->fib_index = fib_index;
899 m->twice_nat = twice_nat;
900 m->out2in_only = out2in_only;
903 m->local_port = l_port;
904 m->external_port = e_port;
911 .src_address = m->local_addr,
913 m->worker_index = sm->worker_in2out_cb (&ip, m->fib_index);
914 tsm = vec_elt_at_index (sm->per_thread_data, m->worker_index);
917 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
919 m_key.addr = m->local_addr;
920 m_key.port = m->local_port;
921 m_key.protocol = m->proto;
922 m_key.fib_index = m->fib_index;
923 kv.key = m_key.as_u64;
924 kv.value = m - sm->static_mappings;
926 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
927 if (twice_nat || out2in_only)
929 m_key.port = clib_host_to_net_u16 (m->local_port);
930 kv.key = m_key.as_u64;
932 if (clib_bihash_add_del_8_8(&tsm->in2out, &kv, 1))
933 clib_warning ("in2out key add failed");
936 m_key.addr = m->external_addr;
937 m_key.port = m->external_port;
938 m_key.fib_index = sm->outside_fib_index;
939 kv.key = m_key.as_u64;
940 kv.value = m - sm->static_mappings;
941 clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1);
942 if (twice_nat || out2in_only)
944 m_key.port = clib_host_to_net_u16 (e_port);
945 kv.key = m_key.as_u64;
947 if (clib_bihash_add_del_8_8(&tsm->out2in, &kv, 1))
948 clib_warning ("out2in key add failed");
951 /* Delete dynamic sessions matching local address (+ local port) */
952 if (!(sm->static_mapping_only))
954 u_key.addr = m->local_addr;
955 u_key.fib_index = m->fib_index;
956 kv.key = u_key.as_u64;
957 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
959 user_index = value.value;
960 u = pool_elt_at_index (tsm->users, user_index);
963 head_index = u->sessions_per_user_list_head_index;
964 head = pool_elt_at_index (tsm->list_pool, head_index);
965 elt_index = head->next;
966 elt = pool_elt_at_index (tsm->list_pool, elt_index);
967 ses_index = elt->value;
968 while (ses_index != ~0)
970 s = pool_elt_at_index (tsm->sessions, ses_index);
971 elt = pool_elt_at_index (tsm->list_pool, elt->next);
972 ses_index = elt->value;
974 if (snat_is_session_static (s))
977 if (!addr_only && (clib_net_to_host_u16 (s->in2out.port) != m->local_port))
980 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
981 clib_dlist_remove (tsm->list_pool, s->per_user_index);
982 pool_put_index (tsm->list_pool, s->per_user_index);
983 pool_put (tsm->sessions, s);
997 if (sw_if_index != ~0)
1000 return VNET_API_ERROR_NO_SUCH_ENTRY;
1003 /* Free external address port */
1004 if (!(addr_only || sm->static_mapping_only || out2in_only))
1006 for (i = 0; i < vec_len (sm->addresses); i++)
1008 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1010 a = sm->addresses + i;
1013 #define _(N, j, n, s) \
1014 case SNAT_PROTOCOL_##N: \
1015 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1016 if (e_port > 1024) \
1018 a->busy_##n##_ports--; \
1019 a->busy_##n##_ports_per_thread[(e_port - 1024) / sm->port_per_thread]--; \
1022 foreach_snat_protocol
1025 clib_warning("unknown_protocol");
1026 return VNET_API_ERROR_INVALID_VALUE_2;
1033 if (sm->num_workers > 1)
1034 tsm = vec_elt_at_index (sm->per_thread_data, m->worker_index);
1036 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1038 m_key.addr = m->local_addr;
1039 m_key.port = m->local_port;
1040 m_key.protocol = m->proto;
1041 m_key.fib_index = m->fib_index;
1042 kv.key = m_key.as_u64;
1044 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0);
1045 if (twice_nat || out2in_only)
1047 m_key.port = clib_host_to_net_u16 (m->local_port);
1048 kv.key = m_key.as_u64;
1050 if (clib_bihash_add_del_8_8(&tsm->in2out, &kv, 0))
1051 clib_warning ("in2out key del failed");
1054 m_key.addr = m->external_addr;
1055 m_key.port = m->external_port;
1056 m_key.fib_index = sm->outside_fib_index;
1057 kv.key = m_key.as_u64;
1058 clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0);
1059 if (twice_nat || out2in_only)
1061 m_key.port = clib_host_to_net_u16 (m->external_port);
1062 kv.key = m_key.as_u64;
1064 if (clib_bihash_add_del_8_8(&tsm->out2in, &kv, 0))
1065 clib_warning ("out2in key del failed");
1068 /* Delete session(s) for static mapping if exist */
1069 if (!(sm->static_mapping_only) ||
1070 (sm->static_mapping_only && sm->static_mapping_connection_tracking))
1072 u_key.addr = m->local_addr;
1073 u_key.fib_index = m->fib_index;
1074 kv.key = u_key.as_u64;
1075 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1077 user_index = value.value;
1078 u = pool_elt_at_index (tsm->users, user_index);
1079 if (u->nstaticsessions)
1081 head_index = u->sessions_per_user_list_head_index;
1082 head = pool_elt_at_index (tsm->list_pool, head_index);
1083 elt_index = head->next;
1084 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1085 ses_index = elt->value;
1086 while (ses_index != ~0)
1088 s = pool_elt_at_index (tsm->sessions, ses_index);
1089 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1090 ses_index = elt->value;
1094 if ((s->out2in.addr.as_u32 != e_addr.as_u32) &&
1095 (clib_net_to_host_u16 (s->out2in.port) != e_port))
1099 if (is_lb_session (s))
1102 if (!snat_is_session_static (s))
1105 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
1106 clib_dlist_remove (tsm->list_pool, s->per_user_index);
1107 pool_put_index (tsm->list_pool, s->per_user_index);
1108 pool_put (tsm->sessions, s);
1109 u->nstaticsessions--;
1114 if (addr_only && (u->nstaticsessions == 0))
1116 pool_put (tsm->users, u);
1117 clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 0);
1124 /* Delete static mapping from pool */
1125 pool_put (sm->static_mappings, m);
1128 if (!addr_only || (l_addr.as_u32 == e_addr.as_u32))
1131 /* Add/delete external address to FIB */
1132 pool_foreach (interface, sm->interfaces,
1134 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1137 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1140 pool_foreach (interface, sm->output_feature_interfaces,
1142 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1145 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1152 static int lb_local_exists (nat44_lb_addr_port_t * local,
1153 ip4_address_t * e_addr, u16 e_port)
1155 snat_main_t *sm = &snat_main;
1156 snat_static_mapping_t *m;
1157 nat44_lb_addr_port_t *ap;
1160 pool_foreach (m, sm->static_mappings,
1162 if (vec_len(m->locals))
1164 if (m->external_port == e_port && m->external_addr.as_u32 == e_addr->as_u32)
1167 vec_foreach (ap, m->locals)
1169 if (ap->port == local->port && ap->addr.as_u32 == local->addr.as_u32)
1179 int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
1180 snat_protocol_t proto, u32 vrf_id,
1181 nat44_lb_addr_port_t *locals, u8 is_add,
1182 twice_nat_type_t twice_nat, u8 out2in_only,
1185 snat_main_t * sm = &snat_main;
1186 snat_static_mapping_t *m;
1187 snat_session_key_t m_key;
1188 clib_bihash_kv_8_8_t kv, value;
1190 snat_address_t *a = 0;
1192 nat44_lb_addr_port_t *local;
1193 u32 worker_index = 0, elt_index, head_index, ses_index;
1194 snat_main_per_thread_data_t *tsm;
1195 snat_user_key_t u_key;
1198 dlist_elt_t * head, * elt;
1200 m_key.addr = e_addr;
1201 m_key.port = e_port;
1202 m_key.protocol = proto;
1203 m_key.fib_index = sm->outside_fib_index;
1204 kv.key = m_key.as_u64;
1205 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
1208 m = pool_elt_at_index (sm->static_mappings, value.value);
1213 return VNET_API_ERROR_VALUE_EXIST;
1215 if (vec_len (locals) < 2)
1216 return VNET_API_ERROR_INVALID_VALUE;
1218 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
1220 FIB_SOURCE_PLUGIN_LOW);
1222 /* Find external address in allocated addresses and reserve port for
1223 address and port pair mapping when dynamic translations enabled */
1224 if (!(sm->static_mapping_only || out2in_only))
1226 for (i = 0; i < vec_len (sm->addresses); i++)
1228 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1230 a = sm->addresses + i;
1231 /* External port must be unused */
1234 #define _(N, j, n, s) \
1235 case SNAT_PROTOCOL_##N: \
1236 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
1237 return VNET_API_ERROR_INVALID_VALUE; \
1238 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
1239 if (e_port > 1024) \
1241 a->busy_##n##_ports++; \
1242 a->busy_##n##_ports_per_thread[(e_port - 1024) / sm->port_per_thread]++; \
1245 foreach_snat_protocol
1248 clib_warning("unknown_protocol");
1249 return VNET_API_ERROR_INVALID_VALUE_2;
1254 /* External address must be allocated */
1256 return VNET_API_ERROR_NO_SUCH_ENTRY;
1259 pool_get (sm->static_mappings, m);
1260 memset (m, 0, sizeof (*m));
1261 m->tag = vec_dup (tag);
1262 m->external_addr = e_addr;
1265 m->fib_index = fib_index;
1266 m->external_port = e_port;
1268 m->twice_nat = twice_nat;
1269 m->out2in_only = out2in_only;
1271 m_key.addr = m->external_addr;
1272 m_key.port = m->external_port;
1273 m_key.protocol = m->proto;
1274 m_key.fib_index = sm->outside_fib_index;
1275 kv.key = m_key.as_u64;
1276 kv.value = m - sm->static_mappings;
1277 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1))
1279 clib_warning ("static_mapping_by_external key add failed");
1280 return VNET_API_ERROR_UNSPECIFIED;
1286 worker_index = sm->first_worker_index +
1287 sm->workers[sm->next_worker++ % vec_len (sm->workers)];
1288 tsm = vec_elt_at_index (sm->per_thread_data, worker_index);
1289 m->worker_index = worker_index;
1292 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1294 m_key.port = clib_host_to_net_u16 (m->external_port);
1295 kv.key = m_key.as_u64;
1297 if (clib_bihash_add_del_8_8(&tsm->out2in, &kv, 1))
1299 clib_warning ("out2in key add failed");
1300 return VNET_API_ERROR_UNSPECIFIED;
1303 m_key.fib_index = m->fib_index;
1304 for (i = 0; i < vec_len (locals); i++)
1306 m_key.addr = locals[i].addr;
1309 m_key.port = locals[i].port;
1310 kv.key = m_key.as_u64;
1311 kv.value = m - sm->static_mappings;
1312 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
1314 locals[i].prefix = (i == 0) ? locals[i].probability :\
1315 (locals[i - 1].prefix + locals[i].probability);
1316 vec_add1 (m->locals, locals[i]);
1318 m_key.port = clib_host_to_net_u16 (locals[i].port);
1319 kv.key = m_key.as_u64;
1321 if (clib_bihash_add_del_8_8(&tsm->in2out, &kv, 1))
1323 clib_warning ("in2out key add failed");
1324 return VNET_API_ERROR_UNSPECIFIED;
1331 return VNET_API_ERROR_NO_SUCH_ENTRY;
1333 fib_table_unlock (m->fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_PLUGIN_LOW);
1335 /* Free external address port */
1336 if (!(sm->static_mapping_only || out2in_only))
1338 for (i = 0; i < vec_len (sm->addresses); i++)
1340 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1342 a = sm->addresses + i;
1345 #define _(N, j, n, s) \
1346 case SNAT_PROTOCOL_##N: \
1347 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1348 if (e_port > 1024) \
1350 a->busy_##n##_ports--; \
1351 a->busy_##n##_ports_per_thread[(e_port - 1024) / sm->port_per_thread]--; \
1354 foreach_snat_protocol
1357 clib_warning("unknown_protocol");
1358 return VNET_API_ERROR_INVALID_VALUE_2;
1365 tsm = vec_elt_at_index (sm->per_thread_data, m->worker_index);
1366 m_key.addr = m->external_addr;
1367 m_key.port = m->external_port;
1368 m_key.protocol = m->proto;
1369 m_key.fib_index = sm->outside_fib_index;
1370 kv.key = m_key.as_u64;
1371 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0))
1373 clib_warning ("static_mapping_by_external key del failed");
1374 return VNET_API_ERROR_UNSPECIFIED;
1377 m_key.port = clib_host_to_net_u16 (m->external_port);
1378 kv.key = m_key.as_u64;
1379 if (clib_bihash_add_del_8_8(&tsm->out2in, &kv, 0))
1381 clib_warning ("outi2in key del failed");
1382 return VNET_API_ERROR_UNSPECIFIED;
1385 vec_foreach (local, m->locals)
1387 m_key.addr = local->addr;
1390 m_key.port = local->port;
1391 m_key.fib_index = m->fib_index;
1392 kv.key = m_key.as_u64;
1393 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0))
1395 clib_warning ("static_mapping_by_local key del failed");
1396 return VNET_API_ERROR_UNSPECIFIED;
1400 if (!lb_local_exists(local, &e_addr, e_port))
1402 m_key.port = clib_host_to_net_u16 (local->port);
1403 kv.key = m_key.as_u64;
1404 if (clib_bihash_add_del_8_8(&tsm->in2out, &kv, 0))
1406 clib_warning ("in2out key del failed");
1407 return VNET_API_ERROR_UNSPECIFIED;
1410 /* Delete sessions */
1411 u_key.addr = local->addr;
1412 u_key.fib_index = m->fib_index;
1413 kv.key = u_key.as_u64;
1414 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1416 u = pool_elt_at_index (tsm->users, value.value);
1417 if (u->nstaticsessions)
1419 head_index = u->sessions_per_user_list_head_index;
1420 head = pool_elt_at_index (tsm->list_pool, head_index);
1421 elt_index = head->next;
1422 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1423 ses_index = elt->value;
1424 while (ses_index != ~0)
1426 s = pool_elt_at_index (tsm->sessions, ses_index);
1427 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1428 ses_index = elt->value;
1430 if (!(is_lb_session (s)))
1433 if ((s->in2out.addr.as_u32 != local->addr.as_u32) &&
1434 (clib_net_to_host_u16 (s->in2out.port) != local->port))
1437 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
1438 clib_dlist_remove (tsm->list_pool, s->per_user_index);
1439 pool_put_index (tsm->list_pool, s->per_user_index);
1440 pool_put (tsm->sessions, s);
1441 u->nstaticsessions--;
1446 vec_free(m->locals);
1449 pool_put (sm->static_mappings, m);
1456 snat_del_address (snat_main_t *sm, ip4_address_t addr, u8 delete_sm,
1459 snat_address_t *a = 0;
1460 snat_session_t *ses;
1461 u32 *ses_to_be_removed = 0, *ses_index;
1462 clib_bihash_kv_8_8_t kv, value;
1463 snat_user_key_t user_key;
1465 snat_main_per_thread_data_t *tsm;
1466 snat_static_mapping_t *m;
1467 snat_interface_t *interface;
1469 snat_address_t *addresses = twice_nat ? sm->twice_nat_addresses : sm->addresses;
1471 /* Find SNAT address */
1472 for (i=0; i < vec_len (addresses); i++)
1474 if (addresses[i].addr.as_u32 == addr.as_u32)
1481 return VNET_API_ERROR_NO_SUCH_ENTRY;
1485 pool_foreach (m, sm->static_mappings,
1487 if (m->external_addr.as_u32 == addr.as_u32)
1488 (void) snat_add_static_mapping (m->local_addr, m->external_addr,
1489 m->local_port, m->external_port,
1490 m->vrf_id, m->addr_only, ~0,
1491 m->proto, 0, m->twice_nat,
1492 m->out2in_only, m->tag);
1497 /* Check if address is used in some static mapping */
1498 if (is_snat_address_used_in_static_mapping(sm, addr))
1500 clib_warning ("address used in static mapping");
1501 return VNET_API_ERROR_UNSPECIFIED;
1505 if (a->fib_index != ~0)
1506 fib_table_unlock(a->fib_index, FIB_PROTOCOL_IP4,
1507 FIB_SOURCE_PLUGIN_LOW);
1509 /* Delete sessions using address */
1510 if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports)
1512 vec_foreach (tsm, sm->per_thread_data)
1514 pool_foreach (ses, tsm->sessions, ({
1515 if (ses->out2in.addr.as_u32 == addr.as_u32)
1517 ses->outside_address_index = ~0;
1518 nat_free_session_data (sm, ses, tsm - sm->per_thread_data);
1519 clib_dlist_remove (tsm->list_pool, ses->per_user_index);
1520 pool_put_index (tsm->list_pool, ses->per_user_index);
1521 vec_add1 (ses_to_be_removed, ses - tsm->sessions);
1522 user_key.addr = ses->in2out.addr;
1523 user_key.fib_index = ses->in2out.fib_index;
1524 kv.key = user_key.as_u64;
1525 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1527 u = pool_elt_at_index (tsm->users, value.value);
1528 if (snat_is_session_static (ses))
1529 u->nstaticsessions--;
1536 vec_foreach (ses_index, ses_to_be_removed)
1537 pool_put_index (tsm->sessions, ses_index[0]);
1539 vec_free (ses_to_be_removed);
1545 vec_del1 (sm->twice_nat_addresses, i);
1549 vec_del1 (sm->addresses, i);
1551 /* Delete external address from FIB */
1552 pool_foreach (interface, sm->interfaces,
1554 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1557 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1560 pool_foreach (interface, sm->output_feature_interfaces,
1562 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1565 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1572 int snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
1574 snat_main_t *sm = &snat_main;
1575 snat_interface_t *i;
1576 const char * feature_name, *del_feature_name;
1577 snat_address_t * ap;
1578 snat_static_mapping_t * m;
1579 snat_det_map_t * dm;
1581 if (sm->out2in_dpo && !is_inside)
1582 return VNET_API_ERROR_UNSUPPORTED;
1584 pool_foreach (i, sm->output_feature_interfaces,
1586 if (i->sw_if_index == sw_if_index)
1587 return VNET_API_ERROR_VALUE_EXIST;
1590 if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking))
1591 feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast";
1594 if (sm->num_workers > 1 && !sm->deterministic)
1595 feature_name = is_inside ? "nat44-in2out-worker-handoff" : "nat44-out2in-worker-handoff";
1596 else if (sm->deterministic)
1597 feature_name = is_inside ? "nat44-det-in2out" : "nat44-det-out2in";
1599 feature_name = is_inside ? "nat44-in2out" : "nat44-out2in";
1602 if (sm->fq_in2out_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1603 sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index, 0);
1605 if (sm->fq_out2in_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1606 sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, 0);
1608 pool_foreach (i, sm->interfaces,
1610 if (i->sw_if_index == sw_if_index)
1614 if (nat_interface_is_inside(i) && nat_interface_is_outside(i))
1617 i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE;
1619 i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE;
1621 if (sm->num_workers > 1 && !sm->deterministic)
1623 del_feature_name = "nat44-handoff-classify";
1624 feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1625 "nat44-out2in-worker-handoff";
1627 else if (sm->deterministic)
1629 del_feature_name = "nat44-det-classify";
1630 feature_name = !is_inside ? "nat44-det-in2out" :
1635 del_feature_name = "nat44-classify";
1636 feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1639 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1640 sw_if_index, 0, 0, 0);
1641 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1642 sw_if_index, 1, 0, 0);
1644 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1645 sw_if_index, 1, 0, 0);
1649 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1650 sw_if_index, 0, 0, 0);
1651 pool_put (sm->interfaces, i);
1653 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1654 sw_if_index, 0, 0, 0);
1659 if ((nat_interface_is_inside(i) && is_inside) ||
1660 (nat_interface_is_outside(i) && !is_inside))
1663 if (sm->num_workers > 1 && !sm->deterministic)
1665 del_feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1666 "nat44-out2in-worker-handoff";
1667 feature_name = "nat44-handoff-classify";
1669 else if (sm->deterministic)
1671 del_feature_name = !is_inside ? "nat44-det-in2out" :
1673 feature_name = "nat44-det-classify";
1677 del_feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1678 feature_name = "nat44-classify";
1681 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1682 sw_if_index, 0, 0, 0);
1683 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1684 sw_if_index, 1, 0, 0);
1686 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1687 sw_if_index, 0, 0, 0);
1696 return VNET_API_ERROR_NO_SUCH_ENTRY;
1698 pool_get (sm->interfaces, i);
1699 i->sw_if_index = sw_if_index;
1701 vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0, 0);
1703 if (is_inside && !sm->out2in_dpo)
1704 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1705 sw_if_index, 1, 0, 0);
1710 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
1714 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
1716 /* Add/delete external addresses to FIB */
1718 vec_foreach (ap, sm->addresses)
1719 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
1721 pool_foreach (m, sm->static_mappings,
1723 if (!(m->addr_only) || (m->local_addr.as_u32 == m->external_addr.as_u32))
1726 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
1729 pool_foreach (dm, sm->det_maps,
1731 snat_add_del_addr_to_fib(&dm->out_addr, dm->out_plen, sw_if_index, !is_del);
1737 int snat_interface_add_del_output_feature (u32 sw_if_index,
1741 snat_main_t *sm = &snat_main;
1742 snat_interface_t *i;
1743 snat_address_t * ap;
1744 snat_static_mapping_t * m;
1746 if (sm->deterministic ||
1747 (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)))
1748 return VNET_API_ERROR_UNSUPPORTED;
1750 pool_foreach (i, sm->interfaces,
1752 if (i->sw_if_index == sw_if_index)
1753 return VNET_API_ERROR_VALUE_EXIST;
1758 vnet_feature_enable_disable ("ip4-unicast", "nat44-hairpin-dst",
1759 sw_if_index, !is_del, 0, 0);
1760 vnet_feature_enable_disable ("ip4-output", "nat44-hairpin-src",
1761 sw_if_index, !is_del, 0, 0);
1765 if (sm->num_workers > 1)
1767 vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in-worker-handoff",
1768 sw_if_index, !is_del, 0, 0);
1769 vnet_feature_enable_disable ("ip4-output",
1770 "nat44-in2out-output-worker-handoff",
1771 sw_if_index, !is_del, 0, 0);
1775 vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in", sw_if_index,
1777 vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output",
1778 sw_if_index, !is_del, 0, 0);
1782 if (sm->fq_in2out_output_index == ~0 && sm->num_workers > 1)
1783 sm->fq_in2out_output_index =
1784 vlib_frame_queue_main_init (sm->in2out_output_node_index, 0);
1786 if (sm->fq_out2in_index == ~0 && sm->num_workers > 1)
1787 sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, 0);
1789 pool_foreach (i, sm->output_feature_interfaces,
1791 if (i->sw_if_index == sw_if_index)
1794 pool_put (sm->output_feature_interfaces, i);
1796 return VNET_API_ERROR_VALUE_EXIST;
1803 return VNET_API_ERROR_NO_SUCH_ENTRY;
1805 pool_get (sm->output_feature_interfaces, i);
1806 i->sw_if_index = sw_if_index;
1809 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
1811 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
1813 /* Add/delete external addresses to FIB */
1818 vec_foreach (ap, sm->addresses)
1819 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
1821 pool_foreach (m, sm->static_mappings,
1823 if (!(m->addr_only) || (m->local_addr.as_u32 == m->external_addr.as_u32))
1826 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
1832 int snat_set_workers (uword * bitmap)
1834 snat_main_t *sm = &snat_main;
1837 if (sm->num_workers < 2)
1838 return VNET_API_ERROR_FEATURE_DISABLED;
1840 if (clib_bitmap_last_set (bitmap) >= sm->num_workers)
1841 return VNET_API_ERROR_INVALID_WORKER;
1843 vec_free (sm->workers);
1844 clib_bitmap_foreach (i, bitmap,
1846 vec_add1(sm->workers, i);
1847 sm->per_thread_data[sm->first_worker_index + i].snat_thread_index = j;
1851 sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers);
1852 sm->num_snat_thread = _vec_len (sm->workers);
1859 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
1862 ip4_address_t * address,
1864 u32 if_address_index,
1868 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
1871 ip4_address_t * address,
1873 u32 if_address_index,
1877 nat_alloc_addr_and_port_default (snat_address_t * addresses,
1880 snat_session_key_t * k,
1881 u32 * address_indexp,
1882 u16 port_per_thread,
1883 u32 snat_thread_index);
1885 static clib_error_t * snat_init (vlib_main_t * vm)
1887 snat_main_t * sm = &snat_main;
1888 clib_error_t * error = 0;
1889 ip4_main_t * im = &ip4_main;
1890 ip_lookup_main_t * lm = &im->lookup_main;
1892 vlib_thread_registration_t *tr;
1893 vlib_thread_main_t *tm = vlib_get_thread_main ();
1896 ip4_add_del_interface_address_callback_t cb4;
1899 sm->vnet_main = vnet_get_main();
1901 sm->ip4_lookup_main = lm;
1902 sm->api_main = &api_main;
1903 sm->first_worker_index = 0;
1904 sm->next_worker = 0;
1905 sm->num_workers = 0;
1906 sm->num_snat_thread = 1;
1908 sm->port_per_thread = 0xffff - 1024;
1909 sm->fq_in2out_index = ~0;
1910 sm->fq_out2in_index = ~0;
1911 sm->udp_timeout = SNAT_UDP_TIMEOUT;
1912 sm->tcp_established_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
1913 sm->tcp_transitory_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
1914 sm->icmp_timeout = SNAT_ICMP_TIMEOUT;
1915 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;
1916 sm->forwarding_enabled = 0;
1918 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
1921 tr = (vlib_thread_registration_t *) p[0];
1924 sm->num_workers = tr->count;
1925 sm->first_worker_index = tr->first_index;
1929 vec_validate (sm->per_thread_data, tm->n_vlib_mains - 1);
1931 /* Use all available workers by default */
1932 if (sm->num_workers > 1)
1934 for (i=0; i < sm->num_workers; i++)
1935 bitmap = clib_bitmap_set (bitmap, i, 1);
1936 snat_set_workers(bitmap);
1937 clib_bitmap_free (bitmap);
1941 sm->per_thread_data[0].snat_thread_index = 0;
1944 error = snat_api_init(vm, sm);
1948 /* Set up the interface address add/del callback */
1949 cb4.function = snat_ip4_add_del_interface_address_cb;
1950 cb4.function_opaque = 0;
1952 vec_add1 (im->add_del_interface_address_callbacks, cb4);
1954 cb4.function = nat_ip4_add_del_addr_only_sm_cb;
1955 cb4.function_opaque = 0;
1957 vec_add1 (im->add_del_interface_address_callbacks, cb4);
1959 nat_dpo_module_init ();
1961 /* Init IPFIX logging */
1962 snat_ipfix_logging_init(vm);
1965 error = nat64_init(vm);
1973 /* Init virtual fragmenentation reassembly */
1974 return nat_reass_init(vm);
1977 VLIB_INIT_FUNCTION (snat_init);
1979 void snat_free_outside_address_and_port (snat_address_t * addresses,
1981 snat_session_key_t * k,
1985 u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
1987 ASSERT (address_index < vec_len (addresses));
1989 a = addresses + address_index;
1991 switch (k->protocol)
1993 #define _(N, i, n, s) \
1994 case SNAT_PROTOCOL_##N: \
1995 ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
1996 port_host_byte_order) == 1); \
1997 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
1998 port_host_byte_order, 0); \
1999 a->busy_##n##_ports--; \
2000 a->busy_##n##_ports_per_thread[thread_index]--; \
2002 foreach_snat_protocol
2005 clib_warning("unknown_protocol");
2011 * @brief Match NAT44 static mapping.
2013 * @param sm NAT main.
2014 * @param match Address and port to match.
2015 * @param mapping External or local address and port of the matched mapping.
2016 * @param by_external If 0 match by local address otherwise match by external
2018 * @param is_addr_only If matched mapping is address only
2019 * @param twice_nat If matched mapping is twice NAT.
2020 * @param lb If matched mapping is load-balanced.
2022 * @returns 0 if match found otherwise 1.
2024 int snat_static_mapping_match (snat_main_t * sm,
2025 snat_session_key_t match,
2026 snat_session_key_t * mapping,
2029 twice_nat_type_t *twice_nat,
2032 clib_bihash_kv_8_8_t kv, value;
2033 snat_static_mapping_t *m;
2034 snat_session_key_t m_key;
2035 clib_bihash_8_8_t *mapping_hash = &sm->static_mapping_by_local;
2036 u32 rand, lo = 0, hi, mid;
2039 mapping_hash = &sm->static_mapping_by_external;
2041 m_key.addr = match.addr;
2042 m_key.port = clib_net_to_host_u16 (match.port);
2043 m_key.protocol = match.protocol;
2044 m_key.fib_index = match.fib_index;
2046 kv.key = m_key.as_u64;
2048 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2050 /* Try address only mapping */
2053 kv.key = m_key.as_u64;
2054 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2058 m = pool_elt_at_index (sm->static_mappings, value.value);
2062 if (vec_len (m->locals))
2064 hi = vec_len (m->locals) - 1;
2065 rand = 1 + (random_u32 (&sm->random_seed) % m->locals[hi].prefix);
2068 mid = ((hi - lo) >> 1) + lo;
2069 (rand > m->locals[mid].prefix) ? (lo = mid + 1) : (hi = mid);
2071 if (!(m->locals[lo].prefix >= rand))
2073 mapping->addr = m->locals[lo].addr;
2074 mapping->port = clib_host_to_net_u16 (m->locals[lo].port);
2078 mapping->addr = m->local_addr;
2079 /* Address only mapping doesn't change port */
2080 mapping->port = m->addr_only ? match.port
2081 : clib_host_to_net_u16 (m->local_port);
2083 mapping->fib_index = m->fib_index;
2084 mapping->protocol = m->proto;
2088 mapping->addr = m->external_addr;
2089 /* Address only mapping doesn't change port */
2090 mapping->port = m->addr_only ? match.port
2091 : clib_host_to_net_u16 (m->external_port);
2092 mapping->fib_index = sm->outside_fib_index;
2095 if (PREDICT_FALSE(is_addr_only != 0))
2096 *is_addr_only = m->addr_only;
2098 if (PREDICT_FALSE(twice_nat != 0))
2099 *twice_nat = m->twice_nat;
2101 if (PREDICT_FALSE(lb != 0))
2102 *lb = vec_len (m->locals) > 0;
2107 static_always_inline u16
2108 snat_random_port (u16 min, u16 max)
2110 snat_main_t *sm = &snat_main;
2111 return min + random_u32 (&sm->random_seed) /
2112 (random_u32_max() / (max - min + 1) + 1);
2116 snat_alloc_outside_address_and_port (snat_address_t * addresses,
2119 snat_session_key_t * k,
2120 u32 * address_indexp,
2121 u16 port_per_thread,
2122 u32 snat_thread_index)
2124 snat_main_t *sm = &snat_main;
2126 return sm->alloc_addr_and_port(addresses, fib_index, thread_index, k,
2127 address_indexp, port_per_thread,
2132 nat_alloc_addr_and_port_default (snat_address_t * addresses,
2135 snat_session_key_t * k,
2136 u32 * address_indexp,
2137 u16 port_per_thread,
2138 u32 snat_thread_index)
2141 snat_address_t *a, *ga = 0;
2144 for (i = 0; i < vec_len (addresses); i++)
2147 switch (k->protocol)
2149 #define _(N, j, n, s) \
2150 case SNAT_PROTOCOL_##N: \
2151 if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
2153 if (a->fib_index == fib_index) \
2157 portnum = (port_per_thread * \
2158 snat_thread_index) + \
2159 snat_random_port(1, port_per_thread) + 1024; \
2160 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2162 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2163 a->busy_##n##_ports_per_thread[thread_index]++; \
2164 a->busy_##n##_ports++; \
2165 k->addr = a->addr; \
2166 k->port = clib_host_to_net_u16(portnum); \
2167 *address_indexp = i; \
2171 else if (a->fib_index == ~0) \
2178 foreach_snat_protocol
2181 clib_warning("unknown protocol");
2190 switch (k->protocol)
2192 #define _(N, j, n, s) \
2193 case SNAT_PROTOCOL_##N: \
2196 portnum = (port_per_thread * \
2197 snat_thread_index) + \
2198 snat_random_port(1, port_per_thread) + 1024; \
2199 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2201 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2202 a->busy_##n##_ports_per_thread[thread_index]++; \
2203 a->busy_##n##_ports++; \
2204 k->addr = a->addr; \
2205 k->port = clib_host_to_net_u16(portnum); \
2206 *address_indexp = gi; \
2210 foreach_snat_protocol
2213 clib_warning ("unknown protocol");
2218 /* Totally out of translations to use... */
2219 snat_ipfix_logging_addresses_exhausted(0);
2224 nat_alloc_addr_and_port_mape (snat_address_t * addresses,
2227 snat_session_key_t * k,
2228 u32 * address_indexp,
2229 u16 port_per_thread,
2230 u32 snat_thread_index)
2232 snat_main_t *sm = &snat_main;
2233 snat_address_t *a = addresses;
2234 u16 m, ports, portnum, A, j;
2235 m = 16 - (sm->psid_offset + sm->psid_length);
2236 ports = (1 << (16 - sm->psid_length)) - (1 << m);
2238 if (!vec_len (addresses))
2241 switch (k->protocol)
2243 #define _(N, i, n, s) \
2244 case SNAT_PROTOCOL_##N: \
2245 if (a->busy_##n##_ports < ports) \
2249 A = snat_random_port(1, pow2_mask(sm->psid_offset)); \
2250 j = snat_random_port(0, pow2_mask(m)); \
2251 portnum = A | (sm->psid << sm->psid_offset) | (j << (16 - m)); \
2252 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2254 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2255 a->busy_##n##_ports++; \
2256 k->addr = a->addr; \
2257 k->port = clib_host_to_net_u16 (portnum); \
2258 *address_indexp = i; \
2263 foreach_snat_protocol
2266 clib_warning("unknown protocol");
2271 /* Totally out of translations to use... */
2272 snat_ipfix_logging_addresses_exhausted(0);
2277 nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add)
2279 dpo_id_t dpo_v4 = DPO_INVALID;
2280 fib_prefix_t pfx = {
2281 .fp_proto = FIB_PROTOCOL_IP4,
2283 .fp_addr.ip4.as_u32 = addr.as_u32,
2288 nat_dpo_create (DPO_PROTO_IP4, 0, &dpo_v4);
2289 fib_table_entry_special_dpo_add (0, &pfx, FIB_SOURCE_PLUGIN_HI,
2290 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4);
2291 dpo_reset (&dpo_v4);
2295 fib_table_entry_special_remove (0, &pfx, FIB_SOURCE_PLUGIN_HI);
2300 unformat_snat_protocol (unformat_input_t * input, va_list * args)
2302 u32 *r = va_arg (*args, u32 *);
2305 #define _(N, i, n, s) else if (unformat (input, s)) *r = SNAT_PROTOCOL_##N;
2306 foreach_snat_protocol
2314 format_snat_protocol (u8 * s, va_list * args)
2316 u32 i = va_arg (*args, u32);
2321 #define _(N, j, n, str) case SNAT_PROTOCOL_##N: t = (u8 *) str; break;
2322 foreach_snat_protocol
2325 s = format (s, "unknown");
2328 s = format (s, "%s", t);
2333 snat_get_worker_in2out_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2335 snat_main_t *sm = &snat_main;
2336 u32 next_worker_index = 0;
2339 next_worker_index = sm->first_worker_index;
2340 hash = ip0->src_address.as_u32 + (ip0->src_address.as_u32 >> 8) +
2341 (ip0->src_address.as_u32 >> 16) + (ip0->src_address.as_u32 >>24);
2343 if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
2344 next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
2346 next_worker_index += sm->workers[hash % _vec_len (sm->workers)];
2348 return next_worker_index;
2352 snat_get_worker_out2in_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2354 snat_main_t *sm = &snat_main;
2357 snat_session_key_t m_key;
2358 clib_bihash_kv_8_8_t kv, value;
2359 snat_static_mapping_t *m;
2360 nat_ed_ses_key_t key;
2361 clib_bihash_kv_16_8_t s_kv, s_value;
2362 snat_main_per_thread_data_t *tsm;
2366 u32 next_worker_index = 0;
2368 /* first try static mappings without port */
2369 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2371 m_key.addr = ip0->dst_address;
2374 m_key.fib_index = rx_fib_index0;
2375 kv.key = m_key.as_u64;
2376 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
2378 m = pool_elt_at_index (sm->static_mappings, value.value);
2379 return m->worker_index;
2383 proto = ip_proto_to_snat_proto (ip0->protocol);
2384 udp = ip4_next_header (ip0);
2385 port = udp->dst_port;
2387 if (PREDICT_FALSE (ip4_is_fragment (ip0)))
2389 if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
2390 return vlib_get_thread_index ();
2392 if (PREDICT_TRUE (!ip4_is_first_fragment (ip0)))
2394 nat_reass_ip4_t *reass;
2396 reass = nat_ip4_reass_find (ip0->src_address, ip0->dst_address,
2397 ip0->fragment_id, ip0->protocol);
2399 if (reass && (reass->thread_index != (u32) ~ 0))
2400 return reass->thread_index;
2402 return vlib_get_thread_index ();
2406 /* unknown protocol */
2407 if (PREDICT_FALSE (proto == ~0))
2409 key.l_addr = ip0->dst_address;
2410 key.r_addr = ip0->src_address;
2411 key.fib_index = rx_fib_index0;
2412 key.proto = ip0->protocol;
2415 s_kv.key[0] = key.as_u64[0];
2416 s_kv.key[1] = key.as_u64[1];
2418 if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
2420 for (i = 0; i < _vec_len (sm->per_thread_data); i++)
2422 tsm = vec_elt_at_index (sm->per_thread_data, i);
2423 if (!pool_is_free_index(tsm->sessions, s_value.value))
2425 s = pool_elt_at_index (tsm->sessions, s_value.value);
2426 if (s->out2in.addr.as_u32 == ip0->dst_address.as_u32 &&
2427 s->out2in.port == ip0->protocol &&
2428 snat_is_unk_proto_session (s))
2434 /* if no session use current thread */
2435 return vlib_get_thread_index ();
2438 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_ICMP))
2440 icmp46_header_t * icmp = (icmp46_header_t *) udp;
2441 icmp_echo_header_t *echo = (icmp_echo_header_t *)(icmp + 1);
2442 if (!icmp_is_error_message (icmp))
2443 port = echo->identifier;
2446 ip4_header_t *inner_ip = (ip4_header_t *)(echo + 1);
2447 proto = ip_proto_to_snat_proto (inner_ip->protocol);
2448 void *l4_header = ip4_next_header (inner_ip);
2451 case SNAT_PROTOCOL_ICMP:
2452 icmp = (icmp46_header_t*)l4_header;
2453 echo = (icmp_echo_header_t *)(icmp + 1);
2454 port = echo->identifier;
2456 case SNAT_PROTOCOL_UDP:
2457 case SNAT_PROTOCOL_TCP:
2458 port = ((tcp_udp_header_t*)l4_header)->src_port;
2461 return vlib_get_thread_index ();
2466 /* try static mappings with port */
2467 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2469 m_key.addr = ip0->dst_address;
2470 m_key.port = clib_net_to_host_u16 (port);
2471 m_key.protocol = proto;
2472 m_key.fib_index = rx_fib_index0;
2473 kv.key = m_key.as_u64;
2474 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
2476 m = pool_elt_at_index (sm->static_mappings, value.value);
2477 return m->worker_index;
2481 /* worker by outside port */
2482 next_worker_index = sm->first_worker_index;
2483 next_worker_index +=
2484 sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread];
2485 return next_worker_index;
2488 static clib_error_t *
2489 snat_config (vlib_main_t * vm, unformat_input_t * input)
2491 snat_main_t * sm = &snat_main;
2492 nat66_main_t * nm = &nat66_main;
2493 u32 translation_buckets = 1024;
2494 u32 translation_memory_size = 128<<20;
2495 u32 user_buckets = 128;
2496 u32 user_memory_size = 64<<20;
2497 u32 max_translations_per_user = 100;
2498 u32 outside_vrf_id = 0;
2499 u32 outside_ip6_vrf_id = 0;
2500 u32 inside_vrf_id = 0;
2501 u32 static_mapping_buckets = 1024;
2502 u32 static_mapping_memory_size = 64<<20;
2503 u32 nat64_bib_buckets = 1024;
2504 u32 nat64_bib_memory_size = 128 << 20;
2505 u32 nat64_st_buckets = 2048;
2506 u32 nat64_st_memory_size = 256 << 20;
2507 u8 static_mapping_only = 0;
2508 u8 static_mapping_connection_tracking = 0;
2509 snat_main_per_thread_data_t *tsm;
2510 dslite_main_t * dm = &dslite_main;
2512 sm->deterministic = 0;
2515 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2517 if (unformat (input, "translation hash buckets %d", &translation_buckets))
2519 else if (unformat (input, "translation hash memory %d",
2520 &translation_memory_size));
2521 else if (unformat (input, "user hash buckets %d", &user_buckets))
2523 else if (unformat (input, "user hash memory %d",
2526 else if (unformat (input, "max translations per user %d",
2527 &max_translations_per_user))
2529 else if (unformat (input, "outside VRF id %d",
2532 else if (unformat (input, "outside ip6 VRF id %d",
2533 &outside_ip6_vrf_id))
2535 else if (unformat (input, "inside VRF id %d",
2538 else if (unformat (input, "static mapping only"))
2540 static_mapping_only = 1;
2541 if (unformat (input, "connection tracking"))
2542 static_mapping_connection_tracking = 1;
2544 else if (unformat (input, "deterministic"))
2545 sm->deterministic = 1;
2546 else if (unformat (input, "nat64 bib hash buckets %d",
2547 &nat64_bib_buckets))
2549 else if (unformat (input, "nat64 bib hash memory %d",
2550 &nat64_bib_memory_size))
2552 else if (unformat (input, "nat64 st hash buckets %d", &nat64_st_buckets))
2554 else if (unformat (input, "nat64 st hash memory %d",
2555 &nat64_st_memory_size))
2557 else if (unformat (input, "out2in dpo"))
2559 else if (unformat (input, "dslite ce"))
2560 dslite_set_ce(dm, 1);
2562 return clib_error_return (0, "unknown input '%U'",
2563 format_unformat_error, input);
2566 /* for show commands, etc. */
2567 sm->translation_buckets = translation_buckets;
2568 sm->translation_memory_size = translation_memory_size;
2569 /* do not exceed load factor 10 */
2570 sm->max_translations = 10 * translation_buckets;
2571 sm->user_buckets = user_buckets;
2572 sm->user_memory_size = user_memory_size;
2573 sm->max_translations_per_user = max_translations_per_user;
2574 sm->outside_vrf_id = outside_vrf_id;
2575 sm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
2577 FIB_SOURCE_PLUGIN_HI);
2578 nm->outside_vrf_id = outside_ip6_vrf_id;
2579 nm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2581 FIB_SOURCE_PLUGIN_HI);
2582 sm->inside_vrf_id = inside_vrf_id;
2583 sm->inside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
2585 FIB_SOURCE_PLUGIN_HI);
2586 sm->static_mapping_only = static_mapping_only;
2587 sm->static_mapping_connection_tracking = static_mapping_connection_tracking;
2589 nat64_set_hash(nat64_bib_buckets, nat64_bib_memory_size, nat64_st_buckets,
2590 nat64_st_memory_size);
2592 if (sm->deterministic)
2594 sm->in2out_node_index = snat_det_in2out_node.index;
2595 sm->in2out_output_node_index = ~0;
2596 sm->out2in_node_index = snat_det_out2in_node.index;
2597 sm->icmp_match_in2out_cb = icmp_match_in2out_det;
2598 sm->icmp_match_out2in_cb = icmp_match_out2in_det;
2602 sm->worker_in2out_cb = snat_get_worker_in2out_cb;
2603 sm->worker_out2in_cb = snat_get_worker_out2in_cb;
2604 sm->in2out_node_index = snat_in2out_node.index;
2605 sm->in2out_output_node_index = snat_in2out_output_node.index;
2606 sm->out2in_node_index = snat_out2in_node.index;
2607 if (!static_mapping_only ||
2608 (static_mapping_only && static_mapping_connection_tracking))
2610 sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
2611 sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
2613 vec_foreach (tsm, sm->per_thread_data)
2615 clib_bihash_init_8_8 (&tsm->in2out, "in2out", translation_buckets,
2616 translation_memory_size);
2618 clib_bihash_init_8_8 (&tsm->out2in, "out2in", translation_buckets,
2619 translation_memory_size);
2621 clib_bihash_init_8_8 (&tsm->user_hash, "users", user_buckets,
2625 clib_bihash_init_16_8 (&sm->in2out_ed, "in2out-ed",
2626 translation_buckets, translation_memory_size);
2628 clib_bihash_init_16_8 (&sm->out2in_ed, "out2in-ed",
2629 translation_buckets, translation_memory_size);
2633 sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
2634 sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
2636 clib_bihash_init_8_8 (&sm->static_mapping_by_local,
2637 "static_mapping_by_local", static_mapping_buckets,
2638 static_mapping_memory_size);
2640 clib_bihash_init_8_8 (&sm->static_mapping_by_external,
2641 "static_mapping_by_external", static_mapping_buckets,
2642 static_mapping_memory_size);
2648 VLIB_CONFIG_FUNCTION (snat_config, "nat");
2650 u8 * format_snat_session_state (u8 * s, va_list * args)
2652 u32 i = va_arg (*args, u32);
2657 #define _(v, N, str) case SNAT_SESSION_##N: t = (u8 *) str; break;
2658 foreach_snat_session_state
2661 t = format (t, "unknown");
2663 s = format (s, "%s", t);
2667 u8 * format_snat_key (u8 * s, va_list * args)
2669 snat_session_key_t * key = va_arg (*args, snat_session_key_t *);
2671 s = format (s, "%U proto %U port %d fib %d",
2672 format_ip4_address, &key->addr,
2673 format_snat_protocol, key->protocol,
2674 clib_net_to_host_u16 (key->port), key->fib_index);
2678 u8 * format_snat_session (u8 * s, va_list * args)
2680 snat_main_t * sm __attribute__((unused)) = va_arg (*args, snat_main_t *);
2681 snat_session_t * sess = va_arg (*args, snat_session_t *);
2683 if (snat_is_unk_proto_session (sess))
2685 s = format (s, " i2o %U proto %u fib %u\n",
2686 format_ip4_address, &sess->in2out.addr,
2687 clib_net_to_host_u16 (sess->in2out.port),
2688 sess->in2out.fib_index);
2689 s = format (s, " o2i %U proto %u fib %u\n",
2690 format_ip4_address, &sess->out2in.addr,
2691 clib_net_to_host_u16 (sess->out2in.port),
2692 sess->out2in.fib_index);
2696 s = format (s, " i2o %U\n", format_snat_key, &sess->in2out);
2697 s = format (s, " o2i %U\n", format_snat_key, &sess->out2in);
2699 if (is_ed_session (sess) || is_fwd_bypass_session (sess))
2701 if (is_twice_nat_session (sess))
2703 s = format (s, " external host o2i %U:%d i2o %U:%d\n",
2704 format_ip4_address, &sess->ext_host_addr,
2705 clib_net_to_host_u16 (sess->ext_host_port),
2706 format_ip4_address, &sess->ext_host_nat_addr,
2707 clib_net_to_host_u16 (sess->ext_host_nat_port));
2711 if (sess->ext_host_addr.as_u32)
2712 s = format (s, " external host %U:%u\n",
2713 format_ip4_address, &sess->ext_host_addr,
2714 clib_net_to_host_u16 (sess->ext_host_port));
2717 s = format (s, " last heard %.2f\n", sess->last_heard);
2718 s = format (s, " total pkts %d, total bytes %lld\n",
2719 sess->total_pkts, sess->total_bytes);
2720 if (snat_is_session_static (sess))
2721 s = format (s, " static translation\n");
2723 s = format (s, " dynamic translation\n");
2724 if (is_fwd_bypass_session (sess))
2725 s = format (s, " forwarding-bypass\n");
2726 if (sess->flags & SNAT_SESSION_FLAG_LOAD_BALANCING)
2727 s = format (s, " load-balancing\n");
2728 if (is_twice_nat_session (sess))
2729 s = format (s, " twice-nat\n");
2734 u8 * format_snat_user (u8 * s, va_list * args)
2736 snat_main_per_thread_data_t * sm = va_arg (*args, snat_main_per_thread_data_t *);
2737 snat_user_t * u = va_arg (*args, snat_user_t *);
2738 int verbose = va_arg (*args, int);
2739 dlist_elt_t * head, * elt;
2740 u32 elt_index, head_index;
2742 snat_session_t * sess;
2744 s = format (s, "%U: %d dynamic translations, %d static translations\n",
2745 format_ip4_address, &u->addr, u->nsessions, u->nstaticsessions);
2750 if (u->nsessions || u->nstaticsessions)
2752 head_index = u->sessions_per_user_list_head_index;
2753 head = pool_elt_at_index (sm->list_pool, head_index);
2755 elt_index = head->next;
2756 elt = pool_elt_at_index (sm->list_pool, elt_index);
2757 session_index = elt->value;
2759 while (session_index != ~0)
2761 sess = pool_elt_at_index (sm->sessions, session_index);
2763 s = format (s, " %U\n", format_snat_session, sm, sess);
2765 elt_index = elt->next;
2766 elt = pool_elt_at_index (sm->list_pool, elt_index);
2767 session_index = elt->value;
2774 u8 * format_snat_static_mapping (u8 * s, va_list * args)
2776 snat_static_mapping_t *m = va_arg (*args, snat_static_mapping_t *);
2777 nat44_lb_addr_port_t *local;
2780 s = format (s, "local %U external %U vrf %d %s %s",
2781 format_ip4_address, &m->local_addr,
2782 format_ip4_address, &m->external_addr,
2784 m->twice_nat == TWICE_NAT ? "twice-nat" :
2785 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
2786 m->out2in_only ? "out2in-only" : "");
2789 if (vec_len (m->locals))
2791 s = format (s, "%U vrf %d external %U:%d %s %s",
2792 format_snat_protocol, m->proto,
2794 format_ip4_address, &m->external_addr, m->external_port,
2795 m->twice_nat == TWICE_NAT ? "twice-nat" :
2796 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
2797 m->out2in_only ? "out2in-only" : "");
2798 vec_foreach (local, m->locals)
2799 s = format (s, "\n local %U:%d probability %d\%",
2800 format_ip4_address, &local->addr, local->port,
2801 local->probability);
2804 s = format (s, "%U local %U:%d external %U:%d vrf %d %s %s",
2805 format_snat_protocol, m->proto,
2806 format_ip4_address, &m->local_addr, m->local_port,
2807 format_ip4_address, &m->external_addr, m->external_port,
2809 m->twice_nat == TWICE_NAT ? "twice-nat" :
2810 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
2811 m->out2in_only ? "out2in-only" : "");
2816 u8 * format_snat_static_map_to_resolve (u8 * s, va_list * args)
2818 snat_static_map_resolve_t *m = va_arg (*args, snat_static_map_resolve_t *);
2819 vnet_main_t *vnm = vnet_get_main();
2822 s = format (s, "local %U external %U vrf %d",
2823 format_ip4_address, &m->l_addr,
2824 format_vnet_sw_if_index_name, vnm, m->sw_if_index,
2827 s = format (s, "%U local %U:%d external %U:%d vrf %d",
2828 format_snat_protocol, m->proto,
2829 format_ip4_address, &m->l_addr, m->l_port,
2830 format_vnet_sw_if_index_name, vnm, m->sw_if_index,
2831 m->e_port, m->vrf_id);
2836 u8 * format_det_map_ses (u8 * s, va_list * args)
2838 snat_det_map_t * det_map = va_arg (*args, snat_det_map_t *);
2839 ip4_address_t in_addr, out_addr;
2840 u32 in_offset, out_offset;
2841 snat_det_session_t * ses = va_arg (*args, snat_det_session_t *);
2842 u32 * i = va_arg (*args, u32 *);
2844 u32 user_index = *i / SNAT_DET_SES_PER_USER;
2845 in_addr.as_u32 = clib_host_to_net_u32 (
2846 clib_net_to_host_u32(det_map->in_addr.as_u32) + user_index);
2847 in_offset = clib_net_to_host_u32(in_addr.as_u32) -
2848 clib_net_to_host_u32(det_map->in_addr.as_u32);
2849 out_offset = in_offset / det_map->sharing_ratio;
2850 out_addr.as_u32 = clib_host_to_net_u32(
2851 clib_net_to_host_u32(det_map->out_addr.as_u32) + out_offset);
2852 s = format (s, "in %U:%d out %U:%d external host %U:%d state: %U expire: %d\n",
2853 format_ip4_address, &in_addr,
2854 clib_net_to_host_u16 (ses->in_port),
2855 format_ip4_address, &out_addr,
2856 clib_net_to_host_u16 (ses->out.out_port),
2857 format_ip4_address, &ses->out.ext_host_addr,
2858 clib_net_to_host_u16 (ses->out.ext_host_port),
2859 format_snat_session_state, ses->state,
2866 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
2869 ip4_address_t * address,
2871 u32 if_address_index,
2874 snat_main_t *sm = &snat_main;
2875 snat_static_map_resolve_t *rp;
2876 snat_static_mapping_t *m;
2877 snat_session_key_t m_key;
2878 clib_bihash_kv_8_8_t kv, value;
2880 ip4_address_t l_addr;
2882 for (i = 0; i < vec_len (sm->to_resolve); i++)
2884 rp = sm->to_resolve + i;
2885 if (rp->addr_only == 0)
2887 if (rp->sw_if_index == sw_if_index)
2894 m_key.addr.as_u32 = address->as_u32;
2895 m_key.port = rp->addr_only ? 0 : rp->e_port;
2896 m_key.protocol = rp->addr_only ? 0 : rp->proto;
2897 m_key.fib_index = sm->outside_fib_index;
2898 kv.key = m_key.as_u64;
2899 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
2902 m = pool_elt_at_index (sm->static_mappings, value.value);
2906 /* Don't trip over lease renewal, static config */
2916 /* Indetity mapping? */
2917 if (rp->l_addr.as_u32 == 0)
2918 l_addr.as_u32 = address[0].as_u32;
2920 l_addr.as_u32 = rp->l_addr.as_u32;
2921 /* Add the static mapping */
2922 rv = snat_add_static_mapping (l_addr,
2928 ~0 /* sw_if_index */,
2933 clib_warning ("snat_add_static_mapping returned %d", rv);
2937 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
2940 ip4_address_t * address,
2942 u32 if_address_index,
2945 snat_main_t *sm = &snat_main;
2946 snat_static_map_resolve_t *rp;
2947 ip4_address_t l_addr;
2951 snat_address_t *addresses = sm->addresses;
2953 for (i = 0; i < vec_len(sm->auto_add_sw_if_indices); i++)
2955 if (sw_if_index == sm->auto_add_sw_if_indices[i])
2959 for (i = 0; i < vec_len(sm->auto_add_sw_if_indices_twice_nat); i++)
2962 addresses = sm->twice_nat_addresses;
2963 if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i])
2972 /* Don't trip over lease renewal, static config */
2973 for (j = 0; j < vec_len(addresses); j++)
2974 if (addresses[j].addr.as_u32 == address->as_u32)
2977 snat_add_address (sm, address, ~0, twice_nat);
2978 /* Scan static map resolution vector */
2979 for (j = 0; j < vec_len (sm->to_resolve); j++)
2981 rp = sm->to_resolve + j;
2984 /* On this interface? */
2985 if (rp->sw_if_index == sw_if_index)
2987 /* Indetity mapping? */
2988 if (rp->l_addr.as_u32 == 0)
2989 l_addr.as_u32 = address[0].as_u32;
2991 l_addr.as_u32 = rp->l_addr.as_u32;
2992 /* Add the static mapping */
2993 rv = snat_add_static_mapping (l_addr,
2999 ~0 /* sw_if_index */,
3004 clib_warning ("snat_add_static_mapping returned %d",
3012 (void) snat_del_address(sm, address[0], 1, twice_nat);
3018 int snat_add_interface_address (snat_main_t *sm, u32 sw_if_index, int is_del,
3021 ip4_main_t * ip4_main = sm->ip4_main;
3022 ip4_address_t * first_int_addr;
3023 snat_static_map_resolve_t *rp;
3024 u32 *indices_to_delete = 0;
3026 u32 *auto_add_sw_if_indices =
3027 twice_nat ? sm->auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices;
3029 first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index,
3030 0 /* just want the address*/);
3032 for (i = 0; i < vec_len(auto_add_sw_if_indices); i++)
3034 if (auto_add_sw_if_indices[i] == sw_if_index)
3038 /* if have address remove it */
3040 (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat);
3043 for (j = 0; j < vec_len (sm->to_resolve); j++)
3045 rp = sm->to_resolve + j;
3046 if (rp->sw_if_index == sw_if_index)
3047 vec_add1 (indices_to_delete, j);
3049 if (vec_len(indices_to_delete))
3051 for (j = vec_len(indices_to_delete)-1; j >= 0; j--)
3052 vec_del1(sm->to_resolve, j);
3053 vec_free(indices_to_delete);
3057 vec_del1(sm->auto_add_sw_if_indices_twice_nat, i);
3059 vec_del1(sm->auto_add_sw_if_indices, i);
3062 return VNET_API_ERROR_VALUE_EXIST;
3069 return VNET_API_ERROR_NO_SUCH_ENTRY;
3071 /* add to the auto-address list */
3073 vec_add1(sm->auto_add_sw_if_indices_twice_nat, sw_if_index);
3075 vec_add1(sm->auto_add_sw_if_indices, sw_if_index);
3077 /* If the address is already bound - or static - add it now */
3079 snat_add_address (sm, first_int_addr, ~0, twice_nat);
3085 nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
3086 snat_protocol_t proto, u32 vrf_id, int is_in)
3088 snat_main_per_thread_data_t *tsm;
3089 clib_bihash_kv_8_8_t kv, value;
3091 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3092 snat_session_key_t key;
3094 clib_bihash_8_8_t *t;
3095 snat_user_key_t u_key;
3098 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3099 if (sm->num_workers > 1)
3101 vec_elt_at_index (sm->per_thread_data,
3102 sm->worker_in2out_cb (&ip, fib_index));
3104 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
3106 key.addr.as_u32 = addr->as_u32;
3107 key.port = clib_host_to_net_u16 (port);
3108 key.protocol = proto;
3109 key.fib_index = fib_index;
3110 kv.key = key.as_u64;
3111 t = is_in ? &tsm->in2out : &tsm->out2in;
3112 if (!clib_bihash_search_8_8 (t, &kv, &value))
3114 if (pool_is_free_index (tsm->sessions, value.value))
3115 return VNET_API_ERROR_UNSPECIFIED;
3117 s = pool_elt_at_index (tsm->sessions, value.value);
3118 kv.key = s->in2out.as_u64;
3119 clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 0);
3120 kv.key = s->out2in.as_u64;
3121 clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 0);
3122 u_key.addr = s->in2out.addr;
3123 u_key.fib_index = s->in2out.fib_index;
3124 kv.key = u_key.as_u64;
3125 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
3127 u = pool_elt_at_index (tsm->users, value.value);
3128 if (snat_is_session_static (s))
3129 u->nstaticsessions--;
3133 clib_dlist_remove (tsm->list_pool, s->per_user_index);
3134 pool_put_index (tsm->list_pool, s->per_user_index);
3135 pool_put (tsm->sessions, s);
3139 return VNET_API_ERROR_NO_SUCH_ENTRY;
3143 nat44_del_ed_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
3144 ip4_address_t *eh_addr, u16 eh_port, u8 proto,
3145 u32 vrf_id, int is_in)
3148 clib_bihash_16_8_t *t;
3149 nat_ed_ses_key_t key;
3150 clib_bihash_kv_16_8_t kv, value;
3152 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3155 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3156 if (sm->num_workers > 1)
3157 thread_index = sm->worker_in2out_cb (&ip, fib_index);
3159 thread_index = sm->num_workers;
3161 t = is_in ? &sm->in2out_ed : &sm->out2in_ed;
3162 key.l_addr.as_u32 = addr->as_u32;
3163 key.r_addr.as_u32 = eh_addr->as_u32;
3164 key.l_port = clib_host_to_net_u16 (port);
3165 key.r_port = clib_host_to_net_u16 (eh_port);
3167 key.fib_index = clib_host_to_net_u32 (fib_index);
3168 kv.key[0] = key.as_u64[0];
3169 kv.key[1] = key.as_u64[1];
3170 if (clib_bihash_search_16_8 (t, &kv, &value))
3171 return VNET_API_ERROR_NO_SUCH_ENTRY;
3173 if (pool_is_free_index (sm->per_thread_data[thread_index].sessions, value.value))
3174 return VNET_API_ERROR_UNSPECIFIED;
3175 s = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, value.value);
3176 nat_free_session_data (sm, s, thread_index);
3177 nat44_delete_session (sm, s, thread_index);
3182 nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length)
3184 snat_main_t *sm = &snat_main;
3186 sm->alloc_addr_and_port = nat_alloc_addr_and_port_mape;
3188 sm->psid_offset = psid_offset;
3189 sm->psid_length = psid_length;
3193 nat_set_alloc_addr_and_port_default (void)
3195 snat_main_t *sm = &snat_main;
3197 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;