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",
48 "ip4-dhcp-client-detect"),
50 VNET_FEATURE_INIT (ip4_nat_classify, static) = {
51 .arc_name = "ip4-unicast",
52 .node_name = "nat44-classify",
53 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
55 VNET_FEATURE_INIT (ip4_snat_det_in2out, static) = {
56 .arc_name = "ip4-unicast",
57 .node_name = "nat44-det-in2out",
58 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
60 VNET_FEATURE_INIT (ip4_snat_det_out2in, static) = {
61 .arc_name = "ip4-unicast",
62 .node_name = "nat44-det-out2in",
63 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
65 VNET_FEATURE_INIT (ip4_nat_det_classify, static) = {
66 .arc_name = "ip4-unicast",
67 .node_name = "nat44-det-classify",
68 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
70 VNET_FEATURE_INIT (ip4_snat_in2out_worker_handoff, static) = {
71 .arc_name = "ip4-unicast",
72 .node_name = "nat44-in2out-worker-handoff",
73 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
75 VNET_FEATURE_INIT (ip4_snat_out2in_worker_handoff, static) = {
76 .arc_name = "ip4-unicast",
77 .node_name = "nat44-out2in-worker-handoff",
78 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
80 VNET_FEATURE_INIT (ip4_nat_handoff_classify, static) = {
81 .arc_name = "ip4-unicast",
82 .node_name = "nat44-handoff-classify",
83 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
85 VNET_FEATURE_INIT (ip4_snat_in2out_fast, static) = {
86 .arc_name = "ip4-unicast",
87 .node_name = "nat44-in2out-fast",
88 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
90 VNET_FEATURE_INIT (ip4_snat_out2in_fast, static) = {
91 .arc_name = "ip4-unicast",
92 .node_name = "nat44-out2in-fast",
93 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
95 VNET_FEATURE_INIT (ip4_snat_hairpin_dst, static) = {
96 .arc_name = "ip4-unicast",
97 .node_name = "nat44-hairpin-dst",
98 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
101 /* Hook up output features */
102 VNET_FEATURE_INIT (ip4_snat_in2out_output, static) = {
103 .arc_name = "ip4-output",
104 .node_name = "nat44-in2out-output",
105 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
107 VNET_FEATURE_INIT (ip4_snat_in2out_output_worker_handoff, static) = {
108 .arc_name = "ip4-output",
109 .node_name = "nat44-in2out-output-worker-handoff",
110 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
112 VNET_FEATURE_INIT (ip4_snat_hairpin_src, static) = {
113 .arc_name = "ip4-output",
114 .node_name = "nat44-hairpin-src",
115 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
118 /* Hook up ip4-local features */
119 VNET_FEATURE_INIT (ip4_nat_hairpinning, static) =
121 .arc_name = "ip4-local",
122 .node_name = "nat44-hairpinning",
123 .runs_before = VNET_FEATURES("ip4-local-end-of-arc"),
128 VLIB_PLUGIN_REGISTER () = {
129 .version = VPP_BUILD_VER,
130 .description = "Network Address Translation",
134 vlib_node_registration_t nat44_classify_node;
135 vlib_node_registration_t nat44_det_classify_node;
136 vlib_node_registration_t nat44_handoff_classify_node;
139 NAT44_CLASSIFY_NEXT_IN2OUT,
140 NAT44_CLASSIFY_NEXT_OUT2IN,
141 NAT44_CLASSIFY_N_NEXT,
142 } nat44_classify_next_t;
145 nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index)
147 snat_session_key_t key;
148 clib_bihash_kv_8_8_t kv;
149 nat_ed_ses_key_t ed_key;
150 clib_bihash_kv_16_8_t ed_kv;
153 snat_main_per_thread_data_t *tsm =
154 vec_elt_at_index (sm->per_thread_data, thread_index);
156 if (is_fwd_bypass_session (s))
158 ed_key.l_addr = s->in2out.addr;
159 ed_key.r_addr = s->ext_host_addr;
160 ed_key.l_port = s->in2out.port;
161 ed_key.r_port = s->ext_host_port;
162 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
163 ed_key.fib_index = 0;
164 ed_kv.key[0] = ed_key.as_u64[0];
165 ed_kv.key[1] = ed_key.as_u64[1];
166 if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &ed_kv, 0))
167 clib_warning ("in2out_ed key del failed");
171 /* Endpoint dependent session lookup tables */
172 if (is_ed_session (s))
174 ed_key.l_addr = s->out2in.addr;
175 ed_key.r_addr = s->ext_host_addr;
176 ed_key.fib_index = s->out2in.fib_index;
177 if (snat_is_unk_proto_session (s))
179 ed_key.proto = s->in2out.port;
185 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
186 ed_key.l_port = s->out2in.port;
187 ed_key.r_port = s->ext_host_port;
189 ed_kv.key[0] = ed_key.as_u64[0];
190 ed_kv.key[1] = ed_key.as_u64[1];
191 if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &ed_kv, 0))
192 clib_warning ("out2in_ed key del failed");
194 ed_key.l_addr = s->in2out.addr;
195 ed_key.fib_index = s->in2out.fib_index;
196 if (!snat_is_unk_proto_session (s))
197 ed_key.l_port = s->in2out.port;
198 if (is_twice_nat_session (s))
200 ed_key.r_addr = s->ext_host_nat_addr;
201 ed_key.r_port = s->ext_host_nat_port;
203 ed_kv.key[0] = ed_key.as_u64[0];
204 ed_kv.key[1] = ed_key.as_u64[1];
205 if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &ed_kv, 0))
206 clib_warning ("in2out_ed key del failed");
209 if (snat_is_unk_proto_session (s))
213 snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
214 s->out2in.addr.as_u32,
218 s->in2out.fib_index);
220 /* Twice NAT address and port for external host */
221 if (is_twice_nat_session (s))
223 for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
225 key.protocol = s->in2out.protocol;
226 key.port = s->ext_host_nat_port;
227 a = sm->twice_nat_addresses + i;
228 if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
230 snat_free_outside_address_and_port (sm->twice_nat_addresses,
231 thread_index, &key, i);
237 if (is_ed_session (s))
240 /* Session lookup tables */
241 kv.key = s->in2out.as_u64;
242 if (clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 0))
243 clib_warning ("in2out key del failed");
244 kv.key = s->out2in.as_u64;
245 if (clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 0))
246 clib_warning ("out2in key del failed");
248 if (snat_is_session_static (s))
251 if (s->outside_address_index != ~0)
252 snat_free_outside_address_and_port (sm->addresses, thread_index,
253 &s->out2in, s->outside_address_index);
257 nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr, u32 fib_index,
261 snat_user_key_t user_key;
262 clib_bihash_kv_8_8_t kv, value;
263 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
264 dlist_elt_t * per_user_list_head_elt;
266 user_key.addr.as_u32 = addr->as_u32;
267 user_key.fib_index = fib_index;
268 kv.key = user_key.as_u64;
270 /* Ever heard of the "user" = src ip4 address before? */
271 if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
273 /* no, make a new one */
274 pool_get (tsm->users, u);
275 memset (u, 0, sizeof (*u));
276 u->addr.as_u32 = addr->as_u32;
277 u->fib_index = fib_index;
279 pool_get (tsm->list_pool, per_user_list_head_elt);
281 u->sessions_per_user_list_head_index = per_user_list_head_elt -
284 clib_dlist_init (tsm->list_pool, u->sessions_per_user_list_head_index);
286 kv.value = u - tsm->users;
289 if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1))
290 clib_warning ("user_hash keay add failed");
294 u = pool_elt_at_index (tsm->users, value.value);
301 nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u, u32 thread_index)
304 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
305 u32 oldest_per_user_translation_list_index, session_index;
306 dlist_elt_t * oldest_per_user_translation_list_elt;
307 dlist_elt_t * per_user_translation_list_elt;
309 /* Over quota? Recycle the least recently used translation */
310 if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
312 oldest_per_user_translation_list_index =
313 clib_dlist_remove_head (tsm->list_pool,
314 u->sessions_per_user_list_head_index);
316 ASSERT (oldest_per_user_translation_list_index != ~0);
318 /* Add it back to the end of the LRU list */
319 clib_dlist_addtail (tsm->list_pool,
320 u->sessions_per_user_list_head_index,
321 oldest_per_user_translation_list_index);
322 /* Get the list element */
323 oldest_per_user_translation_list_elt =
324 pool_elt_at_index (tsm->list_pool,
325 oldest_per_user_translation_list_index);
327 /* Get the session index from the list element */
328 session_index = oldest_per_user_translation_list_elt->value;
330 /* Get the session */
331 s = pool_elt_at_index (tsm->sessions, session_index);
332 nat_free_session_data (sm, s, thread_index);
333 if (snat_is_session_static(s))
334 u->nstaticsessions--;
337 s->outside_address_index = ~0;
342 s->ext_host_addr.as_u32 = 0;
343 s->ext_host_port = 0;
344 s->ext_host_nat_addr.as_u32 = 0;
345 s->ext_host_nat_port = 0;
349 pool_get (tsm->sessions, s);
350 memset (s, 0, sizeof (*s));
351 s->outside_address_index = ~0;
353 /* Create list elts */
354 pool_get (tsm->list_pool, per_user_translation_list_elt);
355 clib_dlist_init (tsm->list_pool,
356 per_user_translation_list_elt - tsm->list_pool);
358 per_user_translation_list_elt->value = s - tsm->sessions;
359 s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
360 s->per_user_list_head_index = u->sessions_per_user_list_head_index;
362 clib_dlist_addtail (tsm->list_pool,
363 s->per_user_list_head_index,
364 per_user_translation_list_elt - tsm->list_pool);
371 nat44_classify_node_fn_inline (vlib_main_t * vm,
372 vlib_node_runtime_t * node,
373 vlib_frame_t * frame)
375 u32 n_left_from, * from, * to_next;
376 nat44_classify_next_t next_index;
377 snat_main_t *sm = &snat_main;
378 snat_static_mapping_t *m;
380 from = vlib_frame_vector_args (frame);
381 n_left_from = frame->n_vectors;
382 next_index = node->cached_next_index;
384 while (n_left_from > 0)
388 vlib_get_next_frame (vm, node, next_index,
389 to_next, n_left_to_next);
391 while (n_left_from > 0 && n_left_to_next > 0)
395 u32 next0 = NAT44_CLASSIFY_NEXT_IN2OUT;
398 snat_session_key_t m_key0;
399 clib_bihash_kv_8_8_t kv0, value0;
401 /* speculatively enqueue b0 to the current next frame */
409 b0 = vlib_get_buffer (vm, bi0);
410 ip0 = vlib_buffer_get_current (b0);
412 vec_foreach (ap, sm->addresses)
414 if (ip0->dst_address.as_u32 == ap->addr.as_u32)
416 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
421 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
423 m_key0.addr = ip0->dst_address;
426 m_key0.fib_index = sm->outside_fib_index;
427 kv0.key = m_key0.as_u64;
428 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv0, &value0))
430 m = pool_elt_at_index (sm->static_mappings, value0.value);
431 if (m->local_addr.as_u32 != m->external_addr.as_u32)
432 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
435 udp_header_t * udp0 = ip4_next_header (ip0);
436 m_key0.port = clib_net_to_host_u16 (udp0->dst_port);
437 m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
438 kv0.key = m_key0.as_u64;
439 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv0, &value0))
441 m = pool_elt_at_index (sm->static_mappings, value0.value);
442 if (m->local_addr.as_u32 != m->external_addr.as_u32)
443 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
448 /* verify speculative enqueue, maybe switch current next frame */
449 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
450 to_next, n_left_to_next,
454 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
457 return frame->n_vectors;
461 nat44_classify_node_fn (vlib_main_t * vm,
462 vlib_node_runtime_t * node,
463 vlib_frame_t * frame)
465 return nat44_classify_node_fn_inline (vm, node, frame);
468 VLIB_REGISTER_NODE (nat44_classify_node) = {
469 .function = nat44_classify_node_fn,
470 .name = "nat44-classify",
471 .vector_size = sizeof (u32),
472 .type = VLIB_NODE_TYPE_INTERNAL,
473 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
475 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out",
476 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in",
480 VLIB_NODE_FUNCTION_MULTIARCH (nat44_classify_node,
481 nat44_classify_node_fn);
484 nat44_det_classify_node_fn (vlib_main_t * vm,
485 vlib_node_runtime_t * node,
486 vlib_frame_t * frame)
488 return nat44_classify_node_fn_inline (vm, node, frame);
491 VLIB_REGISTER_NODE (nat44_det_classify_node) = {
492 .function = nat44_det_classify_node_fn,
493 .name = "nat44-det-classify",
494 .vector_size = sizeof (u32),
495 .type = VLIB_NODE_TYPE_INTERNAL,
496 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
498 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-det-in2out",
499 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-det-out2in",
503 VLIB_NODE_FUNCTION_MULTIARCH (nat44_det_classify_node,
504 nat44_det_classify_node_fn);
507 nat44_handoff_classify_node_fn (vlib_main_t * vm,
508 vlib_node_runtime_t * node,
509 vlib_frame_t * frame)
511 return nat44_classify_node_fn_inline (vm, node, frame);
514 VLIB_REGISTER_NODE (nat44_handoff_classify_node) = {
515 .function = nat44_handoff_classify_node_fn,
516 .name = "nat44-handoff-classify",
517 .vector_size = sizeof (u32),
518 .type = VLIB_NODE_TYPE_INTERNAL,
519 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
521 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out-worker-handoff",
522 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in-worker-handoff",
526 VLIB_NODE_FUNCTION_MULTIARCH (nat44_handoff_classify_node,
527 nat44_handoff_classify_node_fn);
530 * @brief Add/del NAT address to FIB.
532 * Add the external NAT address to the FIB as receive entries. This ensures
533 * that VPP will reply to ARP for this address and we don't need to enable
534 * proxy ARP on the outside interface.
536 * @param addr IPv4 address.
537 * @param plen address prefix length
538 * @param sw_if_index Interface.
539 * @param is_add If 0 delete, otherwise add.
542 snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index,
545 fib_prefix_t prefix = {
547 .fp_proto = FIB_PROTOCOL_IP4,
549 .ip4.as_u32 = addr->as_u32,
552 u32 fib_index = ip4_fib_table_get_index_for_sw_if_index(sw_if_index);
555 fib_table_entry_update_one_path(fib_index,
557 FIB_SOURCE_PLUGIN_LOW,
558 (FIB_ENTRY_FLAG_CONNECTED |
559 FIB_ENTRY_FLAG_LOCAL |
560 FIB_ENTRY_FLAG_EXCLUSIVE),
567 FIB_ROUTE_PATH_FLAG_NONE);
569 fib_table_entry_delete(fib_index,
571 FIB_SOURCE_PLUGIN_LOW);
574 void snat_add_address (snat_main_t *sm, ip4_address_t *addr, u32 vrf_id,
579 vlib_thread_main_t *tm = vlib_get_thread_main ();
581 /* Check if address already exists */
582 vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses)
584 if (ap->addr.as_u32 == addr->as_u32)
589 vec_add2 (sm->twice_nat_addresses, ap, 1);
591 vec_add2 (sm->addresses, ap, 1);
596 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
597 FIB_SOURCE_PLUGIN_LOW);
600 #define _(N, i, n, s) \
601 clib_bitmap_alloc (ap->busy_##n##_port_bitmap, 65535); \
602 ap->busy_##n##_ports = 0; \
603 vec_validate_init_empty (ap->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
604 foreach_snat_protocol
610 /* Add external address to FIB */
611 pool_foreach (i, sm->interfaces,
613 if (nat_interface_is_inside(i) || sm->out2in_dpo)
616 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
619 pool_foreach (i, sm->output_feature_interfaces,
621 if (nat_interface_is_inside(i) || sm->out2in_dpo)
624 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
629 static int is_snat_address_used_in_static_mapping (snat_main_t *sm,
632 snat_static_mapping_t *m;
633 pool_foreach (m, sm->static_mappings,
635 if (m->external_addr.as_u32 == addr.as_u32)
642 void increment_v4_address (ip4_address_t * a)
646 v = clib_net_to_host_u32(a->as_u32) + 1;
647 a->as_u32 = clib_host_to_net_u32(v);
651 snat_add_static_mapping_when_resolved (snat_main_t * sm,
652 ip4_address_t l_addr,
657 snat_protocol_t proto,
662 snat_static_map_resolve_t *rp;
664 vec_add2 (sm->to_resolve, rp, 1);
665 rp->l_addr.as_u32 = l_addr.as_u32;
667 rp->sw_if_index = sw_if_index;
671 rp->addr_only = addr_only;
673 rp->tag = vec_dup (tag);
677 * @brief Add static mapping.
679 * Create static mapping between local addr+port and external addr+port.
681 * @param l_addr Local IPv4 address.
682 * @param e_addr External IPv4 address.
683 * @param l_port Local port number.
684 * @param e_port External port number.
685 * @param vrf_id VRF ID.
686 * @param addr_only If 0 address port and pair mapping, otherwise address only.
687 * @param sw_if_index External port instead of specific IP address.
688 * @param is_add If 0 delete static mapping, otherwise add.
689 * @param twice_nat If value is TWICE_NAT then translate external host address
691 * If value is TWICE_NAT_SELF then translate external host
692 * address and port whenever external host address equals
693 * local address of internal host.
694 * @param out2in_only If 1 rule match only out2in direction
695 * @param tag - opaque string tag
699 int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr,
700 u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
701 u32 sw_if_index, snat_protocol_t proto, int is_add,
702 twice_nat_type_t twice_nat, u8 out2in_only,
705 snat_main_t * sm = &snat_main;
706 snat_static_mapping_t *m;
707 snat_session_key_t m_key;
708 clib_bihash_kv_8_8_t kv, value;
709 snat_address_t *a = 0;
712 snat_interface_t *interface;
714 snat_main_per_thread_data_t *tsm;
715 snat_user_key_t u_key;
717 dlist_elt_t * head, * elt;
718 u32 elt_index, head_index;
722 snat_static_map_resolve_t *rp, *rp_match = 0;
724 /* If the external address is a specific interface address */
725 if (sw_if_index != ~0)
727 ip4_address_t * first_int_addr;
729 for (i = 0; i < vec_len (sm->to_resolve); i++)
731 rp = sm->to_resolve + i;
732 if (rp->sw_if_index != sw_if_index &&
733 rp->l_addr.as_u32 != l_addr.as_u32 &&
734 rp->vrf_id != vrf_id && rp->addr_only != addr_only)
739 if (rp->l_port != l_port && rp->e_port != e_port && rp->proto != proto)
747 /* Might be already set... */
748 first_int_addr = ip4_interface_first_address
749 (sm->ip4_main, sw_if_index, 0 /* just want the address*/);
754 return VNET_API_ERROR_VALUE_EXIST;
756 snat_add_static_mapping_when_resolved
757 (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
758 addr_only, is_add, tag);
760 /* DHCP resolution required? */
761 if (first_int_addr == 0)
767 e_addr.as_u32 = first_int_addr->as_u32;
768 /* Identity mapping? */
769 if (l_addr.as_u32 == 0)
770 l_addr.as_u32 = e_addr.as_u32;
776 return VNET_API_ERROR_NO_SUCH_ENTRY;
778 vec_del1 (sm->to_resolve, i);
782 e_addr.as_u32 = first_int_addr->as_u32;
783 /* Identity mapping? */
784 if (l_addr.as_u32 == 0)
785 l_addr.as_u32 = e_addr.as_u32;
793 m_key.port = addr_only ? 0 : e_port;
794 m_key.protocol = addr_only ? 0 : proto;
795 m_key.fib_index = sm->outside_fib_index;
796 kv.key = m_key.as_u64;
797 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
800 m = pool_elt_at_index (sm->static_mappings, value.value);
805 return VNET_API_ERROR_VALUE_EXIST;
807 if (twice_nat && addr_only)
808 return VNET_API_ERROR_UNSUPPORTED;
810 /* Convert VRF id to FIB index */
813 p = hash_get (sm->ip4_main->fib_index_by_table_id, vrf_id);
815 return VNET_API_ERROR_NO_SUCH_FIB;
818 /* If not specified use inside VRF id from SNAT plugin startup config */
821 fib_index = sm->inside_fib_index;
822 vrf_id = sm->inside_vrf_id;
828 m_key.port = addr_only ? 0 : l_port;
829 m_key.protocol = addr_only ? 0 : proto;
830 m_key.fib_index = fib_index;
831 kv.key = m_key.as_u64;
832 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
833 return VNET_API_ERROR_VALUE_EXIST;
836 /* Find external address in allocated addresses and reserve port for
837 address and port pair mapping when dynamic translations enabled */
838 if (!(addr_only || sm->static_mapping_only || out2in_only))
840 for (i = 0; i < vec_len (sm->addresses); i++)
842 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
844 a = sm->addresses + i;
845 /* External port must be unused */
848 #define _(N, j, n, s) \
849 case SNAT_PROTOCOL_##N: \
850 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
851 return VNET_API_ERROR_INVALID_VALUE; \
852 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
855 a->busy_##n##_ports++; \
856 a->busy_##n##_ports_per_thread[(e_port - 1024) / sm->port_per_thread]++; \
859 foreach_snat_protocol
862 clib_warning("unknown_protocol");
863 return VNET_API_ERROR_INVALID_VALUE_2;
868 /* External address must be allocated */
869 if (!a && (l_addr.as_u32 != e_addr.as_u32))
871 if (sw_if_index != ~0)
873 for (i = 0; i < vec_len (sm->to_resolve); i++)
875 rp = sm->to_resolve + i;
878 if (rp->sw_if_index != sw_if_index &&
879 rp->l_addr.as_u32 != l_addr.as_u32 &&
880 rp->vrf_id != vrf_id && rp->l_port != l_port &&
881 rp->e_port != e_port && rp->proto != proto)
884 vec_del1 (sm->to_resolve, i);
888 return VNET_API_ERROR_NO_SUCH_ENTRY;
892 pool_get (sm->static_mappings, m);
893 memset (m, 0, sizeof (*m));
894 m->tag = vec_dup (tag);
895 m->local_addr = l_addr;
896 m->external_addr = e_addr;
897 m->addr_only = addr_only;
899 m->fib_index = fib_index;
900 m->twice_nat = twice_nat;
901 m->out2in_only = out2in_only;
904 m->local_port = l_port;
905 m->external_port = e_port;
912 .src_address = m->local_addr,
914 m->worker_index = sm->worker_in2out_cb (&ip, m->fib_index);
915 tsm = vec_elt_at_index (sm->per_thread_data, m->worker_index);
918 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
920 m_key.addr = m->local_addr;
921 m_key.port = m->local_port;
922 m_key.protocol = m->proto;
923 m_key.fib_index = m->fib_index;
924 kv.key = m_key.as_u64;
925 kv.value = m - sm->static_mappings;
927 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
928 if (twice_nat || out2in_only)
930 m_key.port = clib_host_to_net_u16 (m->local_port);
931 kv.key = m_key.as_u64;
933 if (clib_bihash_add_del_8_8(&tsm->in2out, &kv, 1))
934 clib_warning ("in2out key add failed");
937 m_key.addr = m->external_addr;
938 m_key.port = m->external_port;
939 m_key.fib_index = sm->outside_fib_index;
940 kv.key = m_key.as_u64;
941 kv.value = m - sm->static_mappings;
942 clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1);
943 if (twice_nat || out2in_only)
945 m_key.port = clib_host_to_net_u16 (e_port);
946 kv.key = m_key.as_u64;
948 if (clib_bihash_add_del_8_8(&tsm->out2in, &kv, 1))
949 clib_warning ("out2in key add failed");
952 /* Delete dynamic sessions matching local address (+ local port) */
953 if (!(sm->static_mapping_only))
955 u_key.addr = m->local_addr;
956 u_key.fib_index = m->fib_index;
957 kv.key = u_key.as_u64;
958 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
960 user_index = value.value;
961 u = pool_elt_at_index (tsm->users, user_index);
964 head_index = u->sessions_per_user_list_head_index;
965 head = pool_elt_at_index (tsm->list_pool, head_index);
966 elt_index = head->next;
967 elt = pool_elt_at_index (tsm->list_pool, elt_index);
968 ses_index = elt->value;
969 while (ses_index != ~0)
971 s = pool_elt_at_index (tsm->sessions, ses_index);
972 elt = pool_elt_at_index (tsm->list_pool, elt->next);
973 ses_index = elt->value;
975 if (snat_is_session_static (s))
978 if (!addr_only && (clib_net_to_host_u16 (s->in2out.port) != m->local_port))
981 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
982 clib_dlist_remove (tsm->list_pool, s->per_user_index);
983 pool_put_index (tsm->list_pool, s->per_user_index);
984 pool_put (tsm->sessions, s);
998 if (sw_if_index != ~0)
1001 return VNET_API_ERROR_NO_SUCH_ENTRY;
1004 /* Free external address port */
1005 if (!(addr_only || sm->static_mapping_only || out2in_only))
1007 for (i = 0; i < vec_len (sm->addresses); i++)
1009 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1011 a = sm->addresses + i;
1014 #define _(N, j, n, s) \
1015 case SNAT_PROTOCOL_##N: \
1016 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1017 if (e_port > 1024) \
1019 a->busy_##n##_ports--; \
1020 a->busy_##n##_ports_per_thread[(e_port - 1024) / sm->port_per_thread]--; \
1023 foreach_snat_protocol
1026 clib_warning("unknown_protocol");
1027 return VNET_API_ERROR_INVALID_VALUE_2;
1034 if (sm->num_workers > 1)
1035 tsm = vec_elt_at_index (sm->per_thread_data, m->worker_index);
1037 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1039 m_key.addr = m->local_addr;
1040 m_key.port = m->local_port;
1041 m_key.protocol = m->proto;
1042 m_key.fib_index = m->fib_index;
1043 kv.key = m_key.as_u64;
1045 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0);
1046 if (twice_nat || out2in_only)
1048 m_key.port = clib_host_to_net_u16 (m->local_port);
1049 kv.key = m_key.as_u64;
1051 if (clib_bihash_add_del_8_8(&tsm->in2out, &kv, 0))
1052 clib_warning ("in2out key del failed");
1055 m_key.addr = m->external_addr;
1056 m_key.port = m->external_port;
1057 m_key.fib_index = sm->outside_fib_index;
1058 kv.key = m_key.as_u64;
1059 clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0);
1060 if (twice_nat || out2in_only)
1062 m_key.port = clib_host_to_net_u16 (m->external_port);
1063 kv.key = m_key.as_u64;
1065 if (clib_bihash_add_del_8_8(&tsm->out2in, &kv, 0))
1066 clib_warning ("out2in key del failed");
1069 /* Delete session(s) for static mapping if exist */
1070 if (!(sm->static_mapping_only) ||
1071 (sm->static_mapping_only && sm->static_mapping_connection_tracking))
1073 u_key.addr = m->local_addr;
1074 u_key.fib_index = m->fib_index;
1075 kv.key = u_key.as_u64;
1076 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1078 user_index = value.value;
1079 u = pool_elt_at_index (tsm->users, user_index);
1080 if (u->nstaticsessions)
1082 head_index = u->sessions_per_user_list_head_index;
1083 head = pool_elt_at_index (tsm->list_pool, head_index);
1084 elt_index = head->next;
1085 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1086 ses_index = elt->value;
1087 while (ses_index != ~0)
1089 s = pool_elt_at_index (tsm->sessions, ses_index);
1090 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1091 ses_index = elt->value;
1095 if ((s->out2in.addr.as_u32 != e_addr.as_u32) &&
1096 (clib_net_to_host_u16 (s->out2in.port) != e_port))
1100 if (is_lb_session (s))
1103 if (!snat_is_session_static (s))
1106 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
1107 clib_dlist_remove (tsm->list_pool, s->per_user_index);
1108 pool_put_index (tsm->list_pool, s->per_user_index);
1109 pool_put (tsm->sessions, s);
1110 u->nstaticsessions--;
1115 if (addr_only && (u->nstaticsessions == 0))
1117 pool_put (tsm->users, u);
1118 clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 0);
1125 /* Delete static mapping from pool */
1126 pool_put (sm->static_mappings, m);
1129 if (!addr_only || (l_addr.as_u32 == e_addr.as_u32))
1132 /* Add/delete external address to FIB */
1133 pool_foreach (interface, sm->interfaces,
1135 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1138 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1141 pool_foreach (interface, sm->output_feature_interfaces,
1143 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1146 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1153 static int lb_local_exists (nat44_lb_addr_port_t * local,
1154 ip4_address_t * e_addr, u16 e_port)
1156 snat_main_t *sm = &snat_main;
1157 snat_static_mapping_t *m;
1158 nat44_lb_addr_port_t *ap;
1161 pool_foreach (m, sm->static_mappings,
1163 if (vec_len(m->locals))
1165 if (m->external_port == e_port && m->external_addr.as_u32 == e_addr->as_u32)
1168 vec_foreach (ap, m->locals)
1170 if (ap->port == local->port && ap->addr.as_u32 == local->addr.as_u32)
1180 int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
1181 snat_protocol_t proto, u32 vrf_id,
1182 nat44_lb_addr_port_t *locals, u8 is_add,
1183 twice_nat_type_t twice_nat, u8 out2in_only,
1186 snat_main_t * sm = &snat_main;
1187 snat_static_mapping_t *m;
1188 snat_session_key_t m_key;
1189 clib_bihash_kv_8_8_t kv, value;
1191 snat_address_t *a = 0;
1193 nat44_lb_addr_port_t *local;
1194 u32 worker_index = 0, elt_index, head_index, ses_index;
1195 snat_main_per_thread_data_t *tsm;
1196 snat_user_key_t u_key;
1199 dlist_elt_t * head, * elt;
1201 m_key.addr = e_addr;
1202 m_key.port = e_port;
1203 m_key.protocol = proto;
1204 m_key.fib_index = sm->outside_fib_index;
1205 kv.key = m_key.as_u64;
1206 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
1209 m = pool_elt_at_index (sm->static_mappings, value.value);
1214 return VNET_API_ERROR_VALUE_EXIST;
1216 if (vec_len (locals) < 2)
1217 return VNET_API_ERROR_INVALID_VALUE;
1219 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
1221 FIB_SOURCE_PLUGIN_LOW);
1223 /* Find external address in allocated addresses and reserve port for
1224 address and port pair mapping when dynamic translations enabled */
1225 if (!(sm->static_mapping_only || out2in_only))
1227 for (i = 0; i < vec_len (sm->addresses); i++)
1229 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1231 a = sm->addresses + i;
1232 /* External port must be unused */
1235 #define _(N, j, n, s) \
1236 case SNAT_PROTOCOL_##N: \
1237 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
1238 return VNET_API_ERROR_INVALID_VALUE; \
1239 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
1240 if (e_port > 1024) \
1242 a->busy_##n##_ports++; \
1243 a->busy_##n##_ports_per_thread[(e_port - 1024) / sm->port_per_thread]++; \
1246 foreach_snat_protocol
1249 clib_warning("unknown_protocol");
1250 return VNET_API_ERROR_INVALID_VALUE_2;
1255 /* External address must be allocated */
1257 return VNET_API_ERROR_NO_SUCH_ENTRY;
1260 pool_get (sm->static_mappings, m);
1261 memset (m, 0, sizeof (*m));
1262 m->tag = vec_dup (tag);
1263 m->external_addr = e_addr;
1266 m->fib_index = fib_index;
1267 m->external_port = e_port;
1269 m->twice_nat = twice_nat;
1270 m->out2in_only = out2in_only;
1272 m_key.addr = m->external_addr;
1273 m_key.port = m->external_port;
1274 m_key.protocol = m->proto;
1275 m_key.fib_index = sm->outside_fib_index;
1276 kv.key = m_key.as_u64;
1277 kv.value = m - sm->static_mappings;
1278 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1))
1280 clib_warning ("static_mapping_by_external key add failed");
1281 return VNET_API_ERROR_UNSPECIFIED;
1287 worker_index = sm->first_worker_index +
1288 sm->workers[sm->next_worker++ % vec_len (sm->workers)];
1289 tsm = vec_elt_at_index (sm->per_thread_data, worker_index);
1290 m->worker_index = worker_index;
1293 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1295 m_key.port = clib_host_to_net_u16 (m->external_port);
1296 kv.key = m_key.as_u64;
1298 if (clib_bihash_add_del_8_8(&tsm->out2in, &kv, 1))
1300 clib_warning ("out2in key add failed");
1301 return VNET_API_ERROR_UNSPECIFIED;
1304 m_key.fib_index = m->fib_index;
1305 for (i = 0; i < vec_len (locals); i++)
1307 m_key.addr = locals[i].addr;
1310 m_key.port = locals[i].port;
1311 kv.key = m_key.as_u64;
1312 kv.value = m - sm->static_mappings;
1313 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
1315 locals[i].prefix = (i == 0) ? locals[i].probability :\
1316 (locals[i - 1].prefix + locals[i].probability);
1317 vec_add1 (m->locals, locals[i]);
1319 m_key.port = clib_host_to_net_u16 (locals[i].port);
1320 kv.key = m_key.as_u64;
1322 if (clib_bihash_add_del_8_8(&tsm->in2out, &kv, 1))
1324 clib_warning ("in2out key add failed");
1325 return VNET_API_ERROR_UNSPECIFIED;
1332 return VNET_API_ERROR_NO_SUCH_ENTRY;
1334 fib_table_unlock (m->fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_PLUGIN_LOW);
1336 /* Free external address port */
1337 if (!(sm->static_mapping_only || out2in_only))
1339 for (i = 0; i < vec_len (sm->addresses); i++)
1341 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1343 a = sm->addresses + i;
1346 #define _(N, j, n, s) \
1347 case SNAT_PROTOCOL_##N: \
1348 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1349 if (e_port > 1024) \
1351 a->busy_##n##_ports--; \
1352 a->busy_##n##_ports_per_thread[(e_port - 1024) / sm->port_per_thread]--; \
1355 foreach_snat_protocol
1358 clib_warning("unknown_protocol");
1359 return VNET_API_ERROR_INVALID_VALUE_2;
1366 tsm = vec_elt_at_index (sm->per_thread_data, m->worker_index);
1367 m_key.addr = m->external_addr;
1368 m_key.port = m->external_port;
1369 m_key.protocol = m->proto;
1370 m_key.fib_index = sm->outside_fib_index;
1371 kv.key = m_key.as_u64;
1372 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0))
1374 clib_warning ("static_mapping_by_external key del failed");
1375 return VNET_API_ERROR_UNSPECIFIED;
1378 m_key.port = clib_host_to_net_u16 (m->external_port);
1379 kv.key = m_key.as_u64;
1380 if (clib_bihash_add_del_8_8(&tsm->out2in, &kv, 0))
1382 clib_warning ("outi2in key del failed");
1383 return VNET_API_ERROR_UNSPECIFIED;
1386 vec_foreach (local, m->locals)
1388 m_key.addr = local->addr;
1391 m_key.port = local->port;
1392 m_key.fib_index = m->fib_index;
1393 kv.key = m_key.as_u64;
1394 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0))
1396 clib_warning ("static_mapping_by_local key del failed");
1397 return VNET_API_ERROR_UNSPECIFIED;
1401 if (!lb_local_exists(local, &e_addr, e_port))
1403 m_key.port = clib_host_to_net_u16 (local->port);
1404 kv.key = m_key.as_u64;
1405 if (clib_bihash_add_del_8_8(&tsm->in2out, &kv, 0))
1407 clib_warning ("in2out key del failed");
1408 return VNET_API_ERROR_UNSPECIFIED;
1411 /* Delete sessions */
1412 u_key.addr = local->addr;
1413 u_key.fib_index = m->fib_index;
1414 kv.key = u_key.as_u64;
1415 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1417 u = pool_elt_at_index (tsm->users, value.value);
1418 if (u->nstaticsessions)
1420 head_index = u->sessions_per_user_list_head_index;
1421 head = pool_elt_at_index (tsm->list_pool, head_index);
1422 elt_index = head->next;
1423 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1424 ses_index = elt->value;
1425 while (ses_index != ~0)
1427 s = pool_elt_at_index (tsm->sessions, ses_index);
1428 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1429 ses_index = elt->value;
1431 if (!(is_lb_session (s)))
1434 if ((s->in2out.addr.as_u32 != local->addr.as_u32) &&
1435 (clib_net_to_host_u16 (s->in2out.port) != local->port))
1438 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
1439 clib_dlist_remove (tsm->list_pool, s->per_user_index);
1440 pool_put_index (tsm->list_pool, s->per_user_index);
1441 pool_put (tsm->sessions, s);
1442 u->nstaticsessions--;
1447 vec_free(m->locals);
1450 pool_put (sm->static_mappings, m);
1457 snat_del_address (snat_main_t *sm, ip4_address_t addr, u8 delete_sm,
1460 snat_address_t *a = 0;
1461 snat_session_t *ses;
1462 u32 *ses_to_be_removed = 0, *ses_index;
1463 clib_bihash_kv_8_8_t kv, value;
1464 snat_user_key_t user_key;
1466 snat_main_per_thread_data_t *tsm;
1467 snat_static_mapping_t *m;
1468 snat_interface_t *interface;
1470 snat_address_t *addresses = twice_nat ? sm->twice_nat_addresses : sm->addresses;
1472 /* Find SNAT address */
1473 for (i=0; i < vec_len (addresses); i++)
1475 if (addresses[i].addr.as_u32 == addr.as_u32)
1482 return VNET_API_ERROR_NO_SUCH_ENTRY;
1486 pool_foreach (m, sm->static_mappings,
1488 if (m->external_addr.as_u32 == addr.as_u32)
1489 (void) snat_add_static_mapping (m->local_addr, m->external_addr,
1490 m->local_port, m->external_port,
1491 m->vrf_id, m->addr_only, ~0,
1492 m->proto, 0, m->twice_nat,
1493 m->out2in_only, m->tag);
1498 /* Check if address is used in some static mapping */
1499 if (is_snat_address_used_in_static_mapping(sm, addr))
1501 clib_warning ("address used in static mapping");
1502 return VNET_API_ERROR_UNSPECIFIED;
1506 if (a->fib_index != ~0)
1507 fib_table_unlock(a->fib_index, FIB_PROTOCOL_IP4,
1508 FIB_SOURCE_PLUGIN_LOW);
1510 /* Delete sessions using address */
1511 if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports)
1513 vec_foreach (tsm, sm->per_thread_data)
1515 pool_foreach (ses, tsm->sessions, ({
1516 if (ses->out2in.addr.as_u32 == addr.as_u32)
1518 ses->outside_address_index = ~0;
1519 nat_free_session_data (sm, ses, tsm - sm->per_thread_data);
1520 clib_dlist_remove (tsm->list_pool, ses->per_user_index);
1521 pool_put_index (tsm->list_pool, ses->per_user_index);
1522 vec_add1 (ses_to_be_removed, ses - tsm->sessions);
1523 user_key.addr = ses->in2out.addr;
1524 user_key.fib_index = ses->in2out.fib_index;
1525 kv.key = user_key.as_u64;
1526 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1528 u = pool_elt_at_index (tsm->users, value.value);
1529 if (snat_is_session_static (ses))
1530 u->nstaticsessions--;
1537 vec_foreach (ses_index, ses_to_be_removed)
1538 pool_put_index (tsm->sessions, ses_index[0]);
1540 vec_free (ses_to_be_removed);
1546 vec_del1 (sm->twice_nat_addresses, i);
1550 vec_del1 (sm->addresses, i);
1552 /* Delete external address from FIB */
1553 pool_foreach (interface, sm->interfaces,
1555 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1558 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1561 pool_foreach (interface, sm->output_feature_interfaces,
1563 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1566 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1573 int snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
1575 snat_main_t *sm = &snat_main;
1576 snat_interface_t *i;
1577 const char * feature_name, *del_feature_name;
1578 snat_address_t * ap;
1579 snat_static_mapping_t * m;
1580 snat_det_map_t * dm;
1582 if (sm->out2in_dpo && !is_inside)
1583 return VNET_API_ERROR_UNSUPPORTED;
1585 pool_foreach (i, sm->output_feature_interfaces,
1587 if (i->sw_if_index == sw_if_index)
1588 return VNET_API_ERROR_VALUE_EXIST;
1591 if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking))
1592 feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast";
1595 if (sm->num_workers > 1 && !sm->deterministic)
1596 feature_name = is_inside ? "nat44-in2out-worker-handoff" : "nat44-out2in-worker-handoff";
1597 else if (sm->deterministic)
1598 feature_name = is_inside ? "nat44-det-in2out" : "nat44-det-out2in";
1600 feature_name = is_inside ? "nat44-in2out" : "nat44-out2in";
1603 if (sm->fq_in2out_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1604 sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index, 0);
1606 if (sm->fq_out2in_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1607 sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, 0);
1609 pool_foreach (i, sm->interfaces,
1611 if (i->sw_if_index == sw_if_index)
1615 if (nat_interface_is_inside(i) && nat_interface_is_outside(i))
1618 i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE;
1620 i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE;
1622 if (sm->num_workers > 1 && !sm->deterministic)
1624 del_feature_name = "nat44-handoff-classify";
1625 feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1626 "nat44-out2in-worker-handoff";
1628 else if (sm->deterministic)
1630 del_feature_name = "nat44-det-classify";
1631 feature_name = !is_inside ? "nat44-det-in2out" :
1636 del_feature_name = "nat44-classify";
1637 feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1640 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1641 sw_if_index, 0, 0, 0);
1642 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1643 sw_if_index, 1, 0, 0);
1645 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1646 sw_if_index, 1, 0, 0);
1650 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1651 sw_if_index, 0, 0, 0);
1652 pool_put (sm->interfaces, i);
1654 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1655 sw_if_index, 0, 0, 0);
1660 if ((nat_interface_is_inside(i) && is_inside) ||
1661 (nat_interface_is_outside(i) && !is_inside))
1664 if (sm->num_workers > 1 && !sm->deterministic)
1666 del_feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1667 "nat44-out2in-worker-handoff";
1668 feature_name = "nat44-handoff-classify";
1670 else if (sm->deterministic)
1672 del_feature_name = !is_inside ? "nat44-det-in2out" :
1674 feature_name = "nat44-det-classify";
1678 del_feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1679 feature_name = "nat44-classify";
1682 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1683 sw_if_index, 0, 0, 0);
1684 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1685 sw_if_index, 1, 0, 0);
1687 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1688 sw_if_index, 0, 0, 0);
1697 return VNET_API_ERROR_NO_SUCH_ENTRY;
1699 pool_get (sm->interfaces, i);
1700 i->sw_if_index = sw_if_index;
1702 vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0, 0);
1704 if (is_inside && !sm->out2in_dpo)
1705 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1706 sw_if_index, 1, 0, 0);
1711 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
1715 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
1717 /* Add/delete external addresses to FIB */
1719 vec_foreach (ap, sm->addresses)
1720 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
1722 pool_foreach (m, sm->static_mappings,
1724 if (!(m->addr_only) || (m->local_addr.as_u32 == m->external_addr.as_u32))
1727 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
1730 pool_foreach (dm, sm->det_maps,
1732 snat_add_del_addr_to_fib(&dm->out_addr, dm->out_plen, sw_if_index, !is_del);
1738 int snat_interface_add_del_output_feature (u32 sw_if_index,
1742 snat_main_t *sm = &snat_main;
1743 snat_interface_t *i;
1744 snat_address_t * ap;
1745 snat_static_mapping_t * m;
1747 if (sm->deterministic ||
1748 (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)))
1749 return VNET_API_ERROR_UNSUPPORTED;
1751 pool_foreach (i, sm->interfaces,
1753 if (i->sw_if_index == sw_if_index)
1754 return VNET_API_ERROR_VALUE_EXIST;
1759 vnet_feature_enable_disable ("ip4-unicast", "nat44-hairpin-dst",
1760 sw_if_index, !is_del, 0, 0);
1761 vnet_feature_enable_disable ("ip4-output", "nat44-hairpin-src",
1762 sw_if_index, !is_del, 0, 0);
1766 if (sm->num_workers > 1)
1768 vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in-worker-handoff",
1769 sw_if_index, !is_del, 0, 0);
1770 vnet_feature_enable_disable ("ip4-output",
1771 "nat44-in2out-output-worker-handoff",
1772 sw_if_index, !is_del, 0, 0);
1776 vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in", sw_if_index,
1778 vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output",
1779 sw_if_index, !is_del, 0, 0);
1783 if (sm->fq_in2out_output_index == ~0 && sm->num_workers > 1)
1784 sm->fq_in2out_output_index =
1785 vlib_frame_queue_main_init (sm->in2out_output_node_index, 0);
1787 if (sm->fq_out2in_index == ~0 && sm->num_workers > 1)
1788 sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, 0);
1790 pool_foreach (i, sm->output_feature_interfaces,
1792 if (i->sw_if_index == sw_if_index)
1795 pool_put (sm->output_feature_interfaces, i);
1797 return VNET_API_ERROR_VALUE_EXIST;
1804 return VNET_API_ERROR_NO_SUCH_ENTRY;
1806 pool_get (sm->output_feature_interfaces, i);
1807 i->sw_if_index = sw_if_index;
1810 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
1812 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
1814 /* Add/delete external addresses to FIB */
1819 vec_foreach (ap, sm->addresses)
1820 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
1822 pool_foreach (m, sm->static_mappings,
1824 if (!(m->addr_only) || (m->local_addr.as_u32 == m->external_addr.as_u32))
1827 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
1833 int snat_set_workers (uword * bitmap)
1835 snat_main_t *sm = &snat_main;
1838 if (sm->num_workers < 2)
1839 return VNET_API_ERROR_FEATURE_DISABLED;
1841 if (clib_bitmap_last_set (bitmap) >= sm->num_workers)
1842 return VNET_API_ERROR_INVALID_WORKER;
1844 vec_free (sm->workers);
1845 clib_bitmap_foreach (i, bitmap,
1847 vec_add1(sm->workers, i);
1848 sm->per_thread_data[sm->first_worker_index + i].snat_thread_index = j;
1852 sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers);
1853 sm->num_snat_thread = _vec_len (sm->workers);
1860 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
1863 ip4_address_t * address,
1865 u32 if_address_index,
1869 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
1872 ip4_address_t * address,
1874 u32 if_address_index,
1878 nat_alloc_addr_and_port_default (snat_address_t * addresses,
1881 snat_session_key_t * k,
1882 u32 * address_indexp,
1883 u16 port_per_thread,
1884 u32 snat_thread_index);
1886 static clib_error_t * snat_init (vlib_main_t * vm)
1888 snat_main_t * sm = &snat_main;
1889 clib_error_t * error = 0;
1890 ip4_main_t * im = &ip4_main;
1891 ip_lookup_main_t * lm = &im->lookup_main;
1893 vlib_thread_registration_t *tr;
1894 vlib_thread_main_t *tm = vlib_get_thread_main ();
1897 ip4_add_del_interface_address_callback_t cb4;
1900 sm->vnet_main = vnet_get_main();
1902 sm->ip4_lookup_main = lm;
1903 sm->api_main = &api_main;
1904 sm->first_worker_index = 0;
1905 sm->next_worker = 0;
1906 sm->num_workers = 0;
1907 sm->num_snat_thread = 1;
1909 sm->port_per_thread = 0xffff - 1024;
1910 sm->fq_in2out_index = ~0;
1911 sm->fq_out2in_index = ~0;
1912 sm->udp_timeout = SNAT_UDP_TIMEOUT;
1913 sm->tcp_established_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
1914 sm->tcp_transitory_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
1915 sm->icmp_timeout = SNAT_ICMP_TIMEOUT;
1916 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;
1917 sm->forwarding_enabled = 0;
1919 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
1922 tr = (vlib_thread_registration_t *) p[0];
1925 sm->num_workers = tr->count;
1926 sm->first_worker_index = tr->first_index;
1930 vec_validate (sm->per_thread_data, tm->n_vlib_mains - 1);
1932 /* Use all available workers by default */
1933 if (sm->num_workers > 1)
1935 for (i=0; i < sm->num_workers; i++)
1936 bitmap = clib_bitmap_set (bitmap, i, 1);
1937 snat_set_workers(bitmap);
1938 clib_bitmap_free (bitmap);
1942 sm->per_thread_data[0].snat_thread_index = 0;
1945 error = snat_api_init(vm, sm);
1949 /* Set up the interface address add/del callback */
1950 cb4.function = snat_ip4_add_del_interface_address_cb;
1951 cb4.function_opaque = 0;
1953 vec_add1 (im->add_del_interface_address_callbacks, cb4);
1955 cb4.function = nat_ip4_add_del_addr_only_sm_cb;
1956 cb4.function_opaque = 0;
1958 vec_add1 (im->add_del_interface_address_callbacks, cb4);
1960 nat_dpo_module_init ();
1962 /* Init IPFIX logging */
1963 snat_ipfix_logging_init(vm);
1966 error = nat64_init(vm);
1974 /* Init virtual fragmenentation reassembly */
1975 return nat_reass_init(vm);
1978 VLIB_INIT_FUNCTION (snat_init);
1980 void snat_free_outside_address_and_port (snat_address_t * addresses,
1982 snat_session_key_t * k,
1986 u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
1988 ASSERT (address_index < vec_len (addresses));
1990 a = addresses + address_index;
1992 switch (k->protocol)
1994 #define _(N, i, n, s) \
1995 case SNAT_PROTOCOL_##N: \
1996 ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
1997 port_host_byte_order) == 1); \
1998 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
1999 port_host_byte_order, 0); \
2000 a->busy_##n##_ports--; \
2001 a->busy_##n##_ports_per_thread[thread_index]--; \
2003 foreach_snat_protocol
2006 clib_warning("unknown_protocol");
2012 * @brief Match NAT44 static mapping.
2014 * @param sm NAT main.
2015 * @param match Address and port to match.
2016 * @param mapping External or local address and port of the matched mapping.
2017 * @param by_external If 0 match by local address otherwise match by external
2019 * @param is_addr_only If matched mapping is address only
2020 * @param twice_nat If matched mapping is twice NAT.
2021 * @param lb If matched mapping is load-balanced.
2023 * @returns 0 if match found otherwise 1.
2025 int snat_static_mapping_match (snat_main_t * sm,
2026 snat_session_key_t match,
2027 snat_session_key_t * mapping,
2030 twice_nat_type_t *twice_nat,
2033 clib_bihash_kv_8_8_t kv, value;
2034 snat_static_mapping_t *m;
2035 snat_session_key_t m_key;
2036 clib_bihash_8_8_t *mapping_hash = &sm->static_mapping_by_local;
2037 u32 rand, lo = 0, hi, mid;
2040 mapping_hash = &sm->static_mapping_by_external;
2042 m_key.addr = match.addr;
2043 m_key.port = clib_net_to_host_u16 (match.port);
2044 m_key.protocol = match.protocol;
2045 m_key.fib_index = match.fib_index;
2047 kv.key = m_key.as_u64;
2049 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2051 /* Try address only mapping */
2054 kv.key = m_key.as_u64;
2055 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2059 m = pool_elt_at_index (sm->static_mappings, value.value);
2063 if (vec_len (m->locals))
2065 hi = vec_len (m->locals) - 1;
2066 rand = 1 + (random_u32 (&sm->random_seed) % m->locals[hi].prefix);
2069 mid = ((hi - lo) >> 1) + lo;
2070 (rand > m->locals[mid].prefix) ? (lo = mid + 1) : (hi = mid);
2072 if (!(m->locals[lo].prefix >= rand))
2074 mapping->addr = m->locals[lo].addr;
2075 mapping->port = clib_host_to_net_u16 (m->locals[lo].port);
2079 mapping->addr = m->local_addr;
2080 /* Address only mapping doesn't change port */
2081 mapping->port = m->addr_only ? match.port
2082 : clib_host_to_net_u16 (m->local_port);
2084 mapping->fib_index = m->fib_index;
2085 mapping->protocol = m->proto;
2089 mapping->addr = m->external_addr;
2090 /* Address only mapping doesn't change port */
2091 mapping->port = m->addr_only ? match.port
2092 : clib_host_to_net_u16 (m->external_port);
2093 mapping->fib_index = sm->outside_fib_index;
2096 if (PREDICT_FALSE(is_addr_only != 0))
2097 *is_addr_only = m->addr_only;
2099 if (PREDICT_FALSE(twice_nat != 0))
2100 *twice_nat = m->twice_nat;
2102 if (PREDICT_FALSE(lb != 0))
2103 *lb = vec_len (m->locals) > 0;
2108 static_always_inline u16
2109 snat_random_port (u16 min, u16 max)
2111 snat_main_t *sm = &snat_main;
2112 return min + random_u32 (&sm->random_seed) /
2113 (random_u32_max() / (max - min + 1) + 1);
2117 snat_alloc_outside_address_and_port (snat_address_t * addresses,
2120 snat_session_key_t * k,
2121 u32 * address_indexp,
2122 u16 port_per_thread,
2123 u32 snat_thread_index)
2125 snat_main_t *sm = &snat_main;
2127 return sm->alloc_addr_and_port(addresses, fib_index, thread_index, k,
2128 address_indexp, port_per_thread,
2133 nat_alloc_addr_and_port_default (snat_address_t * addresses,
2136 snat_session_key_t * k,
2137 u32 * address_indexp,
2138 u16 port_per_thread,
2139 u32 snat_thread_index)
2142 snat_address_t *a, *ga = 0;
2145 for (i = 0; i < vec_len (addresses); i++)
2148 switch (k->protocol)
2150 #define _(N, j, n, s) \
2151 case SNAT_PROTOCOL_##N: \
2152 if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
2154 if (a->fib_index == fib_index) \
2158 portnum = (port_per_thread * \
2159 snat_thread_index) + \
2160 snat_random_port(1, port_per_thread) + 1024; \
2161 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2163 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2164 a->busy_##n##_ports_per_thread[thread_index]++; \
2165 a->busy_##n##_ports++; \
2166 k->addr = a->addr; \
2167 k->port = clib_host_to_net_u16(portnum); \
2168 *address_indexp = i; \
2172 else if (a->fib_index == ~0) \
2179 foreach_snat_protocol
2182 clib_warning("unknown protocol");
2191 switch (k->protocol)
2193 #define _(N, j, n, s) \
2194 case SNAT_PROTOCOL_##N: \
2197 portnum = (port_per_thread * \
2198 snat_thread_index) + \
2199 snat_random_port(1, port_per_thread) + 1024; \
2200 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2202 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2203 a->busy_##n##_ports_per_thread[thread_index]++; \
2204 a->busy_##n##_ports++; \
2205 k->addr = a->addr; \
2206 k->port = clib_host_to_net_u16(portnum); \
2207 *address_indexp = gi; \
2211 foreach_snat_protocol
2214 clib_warning ("unknown protocol");
2219 /* Totally out of translations to use... */
2220 snat_ipfix_logging_addresses_exhausted(0);
2225 nat_alloc_addr_and_port_mape (snat_address_t * addresses,
2228 snat_session_key_t * k,
2229 u32 * address_indexp,
2230 u16 port_per_thread,
2231 u32 snat_thread_index)
2233 snat_main_t *sm = &snat_main;
2234 snat_address_t *a = addresses;
2235 u16 m, ports, portnum, A, j;
2236 m = 16 - (sm->psid_offset + sm->psid_length);
2237 ports = (1 << (16 - sm->psid_length)) - (1 << m);
2239 if (!vec_len (addresses))
2242 switch (k->protocol)
2244 #define _(N, i, n, s) \
2245 case SNAT_PROTOCOL_##N: \
2246 if (a->busy_##n##_ports < ports) \
2250 A = snat_random_port(1, pow2_mask(sm->psid_offset)); \
2251 j = snat_random_port(0, pow2_mask(m)); \
2252 portnum = A | (sm->psid << sm->psid_offset) | (j << (16 - m)); \
2253 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2255 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2256 a->busy_##n##_ports++; \
2257 k->addr = a->addr; \
2258 k->port = clib_host_to_net_u16 (portnum); \
2259 *address_indexp = i; \
2264 foreach_snat_protocol
2267 clib_warning("unknown protocol");
2272 /* Totally out of translations to use... */
2273 snat_ipfix_logging_addresses_exhausted(0);
2278 nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add)
2280 dpo_id_t dpo_v4 = DPO_INVALID;
2281 fib_prefix_t pfx = {
2282 .fp_proto = FIB_PROTOCOL_IP4,
2284 .fp_addr.ip4.as_u32 = addr.as_u32,
2289 nat_dpo_create (DPO_PROTO_IP4, 0, &dpo_v4);
2290 fib_table_entry_special_dpo_add (0, &pfx, FIB_SOURCE_PLUGIN_HI,
2291 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4);
2292 dpo_reset (&dpo_v4);
2296 fib_table_entry_special_remove (0, &pfx, FIB_SOURCE_PLUGIN_HI);
2301 unformat_snat_protocol (unformat_input_t * input, va_list * args)
2303 u32 *r = va_arg (*args, u32 *);
2306 #define _(N, i, n, s) else if (unformat (input, s)) *r = SNAT_PROTOCOL_##N;
2307 foreach_snat_protocol
2315 format_snat_protocol (u8 * s, va_list * args)
2317 u32 i = va_arg (*args, u32);
2322 #define _(N, j, n, str) case SNAT_PROTOCOL_##N: t = (u8 *) str; break;
2323 foreach_snat_protocol
2326 s = format (s, "unknown");
2329 s = format (s, "%s", t);
2334 snat_get_worker_in2out_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2336 snat_main_t *sm = &snat_main;
2337 u32 next_worker_index = 0;
2340 next_worker_index = sm->first_worker_index;
2341 hash = ip0->src_address.as_u32 + (ip0->src_address.as_u32 >> 8) +
2342 (ip0->src_address.as_u32 >> 16) + (ip0->src_address.as_u32 >>24);
2344 if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
2345 next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
2347 next_worker_index += sm->workers[hash % _vec_len (sm->workers)];
2349 return next_worker_index;
2353 snat_get_worker_out2in_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2355 snat_main_t *sm = &snat_main;
2358 snat_session_key_t m_key;
2359 clib_bihash_kv_8_8_t kv, value;
2360 snat_static_mapping_t *m;
2361 nat_ed_ses_key_t key;
2362 clib_bihash_kv_16_8_t s_kv, s_value;
2363 snat_main_per_thread_data_t *tsm;
2367 u32 next_worker_index = 0;
2369 /* first try static mappings without port */
2370 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2372 m_key.addr = ip0->dst_address;
2375 m_key.fib_index = rx_fib_index0;
2376 kv.key = m_key.as_u64;
2377 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
2379 m = pool_elt_at_index (sm->static_mappings, value.value);
2380 return m->worker_index;
2384 proto = ip_proto_to_snat_proto (ip0->protocol);
2385 udp = ip4_next_header (ip0);
2386 port = udp->dst_port;
2388 if (PREDICT_FALSE (ip4_is_fragment (ip0)))
2390 if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
2391 return vlib_get_thread_index ();
2393 if (PREDICT_TRUE (!ip4_is_first_fragment (ip0)))
2395 nat_reass_ip4_t *reass;
2397 reass = nat_ip4_reass_find (ip0->src_address, ip0->dst_address,
2398 ip0->fragment_id, ip0->protocol);
2400 if (reass && (reass->thread_index != (u32) ~ 0))
2401 return reass->thread_index;
2403 return vlib_get_thread_index ();
2407 /* unknown protocol */
2408 if (PREDICT_FALSE (proto == ~0))
2410 key.l_addr = ip0->dst_address;
2411 key.r_addr = ip0->src_address;
2412 key.fib_index = rx_fib_index0;
2413 key.proto = ip0->protocol;
2416 s_kv.key[0] = key.as_u64[0];
2417 s_kv.key[1] = key.as_u64[1];
2419 if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
2421 for (i = 0; i < _vec_len (sm->per_thread_data); i++)
2423 tsm = vec_elt_at_index (sm->per_thread_data, i);
2424 if (!pool_is_free_index(tsm->sessions, s_value.value))
2426 s = pool_elt_at_index (tsm->sessions, s_value.value);
2427 if (s->out2in.addr.as_u32 == ip0->dst_address.as_u32 &&
2428 s->out2in.port == ip0->protocol &&
2429 snat_is_unk_proto_session (s))
2435 /* if no session use current thread */
2436 return vlib_get_thread_index ();
2439 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_ICMP))
2441 icmp46_header_t * icmp = (icmp46_header_t *) udp;
2442 icmp_echo_header_t *echo = (icmp_echo_header_t *)(icmp + 1);
2443 if (!icmp_is_error_message (icmp))
2444 port = echo->identifier;
2447 ip4_header_t *inner_ip = (ip4_header_t *)(echo + 1);
2448 proto = ip_proto_to_snat_proto (inner_ip->protocol);
2449 void *l4_header = ip4_next_header (inner_ip);
2452 case SNAT_PROTOCOL_ICMP:
2453 icmp = (icmp46_header_t*)l4_header;
2454 echo = (icmp_echo_header_t *)(icmp + 1);
2455 port = echo->identifier;
2457 case SNAT_PROTOCOL_UDP:
2458 case SNAT_PROTOCOL_TCP:
2459 port = ((tcp_udp_header_t*)l4_header)->src_port;
2462 return vlib_get_thread_index ();
2467 /* try static mappings with port */
2468 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2470 m_key.addr = ip0->dst_address;
2471 m_key.port = clib_net_to_host_u16 (port);
2472 m_key.protocol = proto;
2473 m_key.fib_index = rx_fib_index0;
2474 kv.key = m_key.as_u64;
2475 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
2477 m = pool_elt_at_index (sm->static_mappings, value.value);
2478 return m->worker_index;
2482 /* worker by outside port */
2483 next_worker_index = sm->first_worker_index;
2484 next_worker_index +=
2485 sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread];
2486 return next_worker_index;
2489 static clib_error_t *
2490 snat_config (vlib_main_t * vm, unformat_input_t * input)
2492 snat_main_t * sm = &snat_main;
2493 nat66_main_t * nm = &nat66_main;
2494 u32 translation_buckets = 1024;
2495 u32 translation_memory_size = 128<<20;
2496 u32 user_buckets = 128;
2497 u32 user_memory_size = 64<<20;
2498 u32 max_translations_per_user = 100;
2499 u32 outside_vrf_id = 0;
2500 u32 outside_ip6_vrf_id = 0;
2501 u32 inside_vrf_id = 0;
2502 u32 static_mapping_buckets = 1024;
2503 u32 static_mapping_memory_size = 64<<20;
2504 u32 nat64_bib_buckets = 1024;
2505 u32 nat64_bib_memory_size = 128 << 20;
2506 u32 nat64_st_buckets = 2048;
2507 u32 nat64_st_memory_size = 256 << 20;
2508 u8 static_mapping_only = 0;
2509 u8 static_mapping_connection_tracking = 0;
2510 snat_main_per_thread_data_t *tsm;
2511 dslite_main_t * dm = &dslite_main;
2513 sm->deterministic = 0;
2516 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2518 if (unformat (input, "translation hash buckets %d", &translation_buckets))
2520 else if (unformat (input, "translation hash memory %d",
2521 &translation_memory_size));
2522 else if (unformat (input, "user hash buckets %d", &user_buckets))
2524 else if (unformat (input, "user hash memory %d",
2527 else if (unformat (input, "max translations per user %d",
2528 &max_translations_per_user))
2530 else if (unformat (input, "outside VRF id %d",
2533 else if (unformat (input, "outside ip6 VRF id %d",
2534 &outside_ip6_vrf_id))
2536 else if (unformat (input, "inside VRF id %d",
2539 else if (unformat (input, "static mapping only"))
2541 static_mapping_only = 1;
2542 if (unformat (input, "connection tracking"))
2543 static_mapping_connection_tracking = 1;
2545 else if (unformat (input, "deterministic"))
2546 sm->deterministic = 1;
2547 else if (unformat (input, "nat64 bib hash buckets %d",
2548 &nat64_bib_buckets))
2550 else if (unformat (input, "nat64 bib hash memory %d",
2551 &nat64_bib_memory_size))
2553 else if (unformat (input, "nat64 st hash buckets %d", &nat64_st_buckets))
2555 else if (unformat (input, "nat64 st hash memory %d",
2556 &nat64_st_memory_size))
2558 else if (unformat (input, "out2in dpo"))
2560 else if (unformat (input, "dslite ce"))
2561 dslite_set_ce(dm, 1);
2563 return clib_error_return (0, "unknown input '%U'",
2564 format_unformat_error, input);
2567 /* for show commands, etc. */
2568 sm->translation_buckets = translation_buckets;
2569 sm->translation_memory_size = translation_memory_size;
2570 /* do not exceed load factor 10 */
2571 sm->max_translations = 10 * translation_buckets;
2572 sm->user_buckets = user_buckets;
2573 sm->user_memory_size = user_memory_size;
2574 sm->max_translations_per_user = max_translations_per_user;
2575 sm->outside_vrf_id = outside_vrf_id;
2576 sm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
2578 FIB_SOURCE_PLUGIN_HI);
2579 nm->outside_vrf_id = outside_ip6_vrf_id;
2580 nm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2582 FIB_SOURCE_PLUGIN_HI);
2583 sm->inside_vrf_id = inside_vrf_id;
2584 sm->inside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
2586 FIB_SOURCE_PLUGIN_HI);
2587 sm->static_mapping_only = static_mapping_only;
2588 sm->static_mapping_connection_tracking = static_mapping_connection_tracking;
2590 nat64_set_hash(nat64_bib_buckets, nat64_bib_memory_size, nat64_st_buckets,
2591 nat64_st_memory_size);
2593 if (sm->deterministic)
2595 sm->in2out_node_index = snat_det_in2out_node.index;
2596 sm->in2out_output_node_index = ~0;
2597 sm->out2in_node_index = snat_det_out2in_node.index;
2598 sm->icmp_match_in2out_cb = icmp_match_in2out_det;
2599 sm->icmp_match_out2in_cb = icmp_match_out2in_det;
2603 sm->worker_in2out_cb = snat_get_worker_in2out_cb;
2604 sm->worker_out2in_cb = snat_get_worker_out2in_cb;
2605 sm->in2out_node_index = snat_in2out_node.index;
2606 sm->in2out_output_node_index = snat_in2out_output_node.index;
2607 sm->out2in_node_index = snat_out2in_node.index;
2608 if (!static_mapping_only ||
2609 (static_mapping_only && static_mapping_connection_tracking))
2611 sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
2612 sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
2614 vec_foreach (tsm, sm->per_thread_data)
2616 clib_bihash_init_8_8 (&tsm->in2out, "in2out", translation_buckets,
2617 translation_memory_size);
2619 clib_bihash_init_8_8 (&tsm->out2in, "out2in", translation_buckets,
2620 translation_memory_size);
2622 clib_bihash_init_8_8 (&tsm->user_hash, "users", user_buckets,
2626 clib_bihash_init_16_8 (&sm->in2out_ed, "in2out-ed",
2627 translation_buckets, translation_memory_size);
2629 clib_bihash_init_16_8 (&sm->out2in_ed, "out2in-ed",
2630 translation_buckets, translation_memory_size);
2634 sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
2635 sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
2637 clib_bihash_init_8_8 (&sm->static_mapping_by_local,
2638 "static_mapping_by_local", static_mapping_buckets,
2639 static_mapping_memory_size);
2641 clib_bihash_init_8_8 (&sm->static_mapping_by_external,
2642 "static_mapping_by_external", static_mapping_buckets,
2643 static_mapping_memory_size);
2649 VLIB_CONFIG_FUNCTION (snat_config, "nat");
2651 u8 * format_snat_session_state (u8 * s, va_list * args)
2653 u32 i = va_arg (*args, u32);
2658 #define _(v, N, str) case SNAT_SESSION_##N: t = (u8 *) str; break;
2659 foreach_snat_session_state
2662 t = format (t, "unknown");
2664 s = format (s, "%s", t);
2668 u8 * format_snat_key (u8 * s, va_list * args)
2670 snat_session_key_t * key = va_arg (*args, snat_session_key_t *);
2672 s = format (s, "%U proto %U port %d fib %d",
2673 format_ip4_address, &key->addr,
2674 format_snat_protocol, key->protocol,
2675 clib_net_to_host_u16 (key->port), key->fib_index);
2679 u8 * format_snat_session (u8 * s, va_list * args)
2681 snat_main_t * sm __attribute__((unused)) = va_arg (*args, snat_main_t *);
2682 snat_session_t * sess = va_arg (*args, snat_session_t *);
2684 if (snat_is_unk_proto_session (sess))
2686 s = format (s, " i2o %U proto %u fib %u\n",
2687 format_ip4_address, &sess->in2out.addr,
2688 clib_net_to_host_u16 (sess->in2out.port),
2689 sess->in2out.fib_index);
2690 s = format (s, " o2i %U proto %u fib %u\n",
2691 format_ip4_address, &sess->out2in.addr,
2692 clib_net_to_host_u16 (sess->out2in.port),
2693 sess->out2in.fib_index);
2697 s = format (s, " i2o %U\n", format_snat_key, &sess->in2out);
2698 s = format (s, " o2i %U\n", format_snat_key, &sess->out2in);
2700 if (is_ed_session (sess) || is_fwd_bypass_session (sess))
2702 if (is_twice_nat_session (sess))
2704 s = format (s, " external host o2i %U:%d i2o %U:%d\n",
2705 format_ip4_address, &sess->ext_host_addr,
2706 clib_net_to_host_u16 (sess->ext_host_port),
2707 format_ip4_address, &sess->ext_host_nat_addr,
2708 clib_net_to_host_u16 (sess->ext_host_nat_port));
2712 if (sess->ext_host_addr.as_u32)
2713 s = format (s, " external host %U:%u\n",
2714 format_ip4_address, &sess->ext_host_addr,
2715 clib_net_to_host_u16 (sess->ext_host_port));
2718 s = format (s, " last heard %.2f\n", sess->last_heard);
2719 s = format (s, " total pkts %d, total bytes %lld\n",
2720 sess->total_pkts, sess->total_bytes);
2721 if (snat_is_session_static (sess))
2722 s = format (s, " static translation\n");
2724 s = format (s, " dynamic translation\n");
2725 if (is_fwd_bypass_session (sess))
2726 s = format (s, " forwarding-bypass\n");
2727 if (sess->flags & SNAT_SESSION_FLAG_LOAD_BALANCING)
2728 s = format (s, " load-balancing\n");
2729 if (is_twice_nat_session (sess))
2730 s = format (s, " twice-nat\n");
2735 u8 * format_snat_user (u8 * s, va_list * args)
2737 snat_main_per_thread_data_t * sm = va_arg (*args, snat_main_per_thread_data_t *);
2738 snat_user_t * u = va_arg (*args, snat_user_t *);
2739 int verbose = va_arg (*args, int);
2740 dlist_elt_t * head, * elt;
2741 u32 elt_index, head_index;
2743 snat_session_t * sess;
2745 s = format (s, "%U: %d dynamic translations, %d static translations\n",
2746 format_ip4_address, &u->addr, u->nsessions, u->nstaticsessions);
2751 if (u->nsessions || u->nstaticsessions)
2753 head_index = u->sessions_per_user_list_head_index;
2754 head = pool_elt_at_index (sm->list_pool, head_index);
2756 elt_index = head->next;
2757 elt = pool_elt_at_index (sm->list_pool, elt_index);
2758 session_index = elt->value;
2760 while (session_index != ~0)
2762 sess = pool_elt_at_index (sm->sessions, session_index);
2764 s = format (s, " %U\n", format_snat_session, sm, sess);
2766 elt_index = elt->next;
2767 elt = pool_elt_at_index (sm->list_pool, elt_index);
2768 session_index = elt->value;
2775 u8 * format_snat_static_mapping (u8 * s, va_list * args)
2777 snat_static_mapping_t *m = va_arg (*args, snat_static_mapping_t *);
2778 nat44_lb_addr_port_t *local;
2781 s = format (s, "local %U external %U vrf %d %s %s",
2782 format_ip4_address, &m->local_addr,
2783 format_ip4_address, &m->external_addr,
2785 m->twice_nat == TWICE_NAT ? "twice-nat" :
2786 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
2787 m->out2in_only ? "out2in-only" : "");
2790 if (vec_len (m->locals))
2792 s = format (s, "%U vrf %d external %U:%d %s %s",
2793 format_snat_protocol, m->proto,
2795 format_ip4_address, &m->external_addr, m->external_port,
2796 m->twice_nat == TWICE_NAT ? "twice-nat" :
2797 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
2798 m->out2in_only ? "out2in-only" : "");
2799 vec_foreach (local, m->locals)
2800 s = format (s, "\n local %U:%d probability %d\%",
2801 format_ip4_address, &local->addr, local->port,
2802 local->probability);
2805 s = format (s, "%U local %U:%d external %U:%d vrf %d %s %s",
2806 format_snat_protocol, m->proto,
2807 format_ip4_address, &m->local_addr, m->local_port,
2808 format_ip4_address, &m->external_addr, m->external_port,
2810 m->twice_nat == TWICE_NAT ? "twice-nat" :
2811 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
2812 m->out2in_only ? "out2in-only" : "");
2817 u8 * format_snat_static_map_to_resolve (u8 * s, va_list * args)
2819 snat_static_map_resolve_t *m = va_arg (*args, snat_static_map_resolve_t *);
2820 vnet_main_t *vnm = vnet_get_main();
2823 s = format (s, "local %U external %U vrf %d",
2824 format_ip4_address, &m->l_addr,
2825 format_vnet_sw_if_index_name, vnm, m->sw_if_index,
2828 s = format (s, "%U local %U:%d external %U:%d vrf %d",
2829 format_snat_protocol, m->proto,
2830 format_ip4_address, &m->l_addr, m->l_port,
2831 format_vnet_sw_if_index_name, vnm, m->sw_if_index,
2832 m->e_port, m->vrf_id);
2837 u8 * format_det_map_ses (u8 * s, va_list * args)
2839 snat_det_map_t * det_map = va_arg (*args, snat_det_map_t *);
2840 ip4_address_t in_addr, out_addr;
2841 u32 in_offset, out_offset;
2842 snat_det_session_t * ses = va_arg (*args, snat_det_session_t *);
2843 u32 * i = va_arg (*args, u32 *);
2845 u32 user_index = *i / SNAT_DET_SES_PER_USER;
2846 in_addr.as_u32 = clib_host_to_net_u32 (
2847 clib_net_to_host_u32(det_map->in_addr.as_u32) + user_index);
2848 in_offset = clib_net_to_host_u32(in_addr.as_u32) -
2849 clib_net_to_host_u32(det_map->in_addr.as_u32);
2850 out_offset = in_offset / det_map->sharing_ratio;
2851 out_addr.as_u32 = clib_host_to_net_u32(
2852 clib_net_to_host_u32(det_map->out_addr.as_u32) + out_offset);
2853 s = format (s, "in %U:%d out %U:%d external host %U:%d state: %U expire: %d\n",
2854 format_ip4_address, &in_addr,
2855 clib_net_to_host_u16 (ses->in_port),
2856 format_ip4_address, &out_addr,
2857 clib_net_to_host_u16 (ses->out.out_port),
2858 format_ip4_address, &ses->out.ext_host_addr,
2859 clib_net_to_host_u16 (ses->out.ext_host_port),
2860 format_snat_session_state, ses->state,
2867 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
2870 ip4_address_t * address,
2872 u32 if_address_index,
2875 snat_main_t *sm = &snat_main;
2876 snat_static_map_resolve_t *rp;
2877 snat_static_mapping_t *m;
2878 snat_session_key_t m_key;
2879 clib_bihash_kv_8_8_t kv, value;
2881 ip4_address_t l_addr;
2883 for (i = 0; i < vec_len (sm->to_resolve); i++)
2885 rp = sm->to_resolve + i;
2886 if (rp->addr_only == 0)
2888 if (rp->sw_if_index == sw_if_index)
2895 m_key.addr.as_u32 = address->as_u32;
2896 m_key.port = rp->addr_only ? 0 : rp->e_port;
2897 m_key.protocol = rp->addr_only ? 0 : rp->proto;
2898 m_key.fib_index = sm->outside_fib_index;
2899 kv.key = m_key.as_u64;
2900 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
2903 m = pool_elt_at_index (sm->static_mappings, value.value);
2907 /* Don't trip over lease renewal, static config */
2917 /* Indetity mapping? */
2918 if (rp->l_addr.as_u32 == 0)
2919 l_addr.as_u32 = address[0].as_u32;
2921 l_addr.as_u32 = rp->l_addr.as_u32;
2922 /* Add the static mapping */
2923 rv = snat_add_static_mapping (l_addr,
2929 ~0 /* sw_if_index */,
2934 clib_warning ("snat_add_static_mapping returned %d", rv);
2938 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
2941 ip4_address_t * address,
2943 u32 if_address_index,
2946 snat_main_t *sm = &snat_main;
2947 snat_static_map_resolve_t *rp;
2948 ip4_address_t l_addr;
2952 snat_address_t *addresses = sm->addresses;
2954 for (i = 0; i < vec_len(sm->auto_add_sw_if_indices); i++)
2956 if (sw_if_index == sm->auto_add_sw_if_indices[i])
2960 for (i = 0; i < vec_len(sm->auto_add_sw_if_indices_twice_nat); i++)
2963 addresses = sm->twice_nat_addresses;
2964 if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i])
2973 /* Don't trip over lease renewal, static config */
2974 for (j = 0; j < vec_len(addresses); j++)
2975 if (addresses[j].addr.as_u32 == address->as_u32)
2978 snat_add_address (sm, address, ~0, twice_nat);
2979 /* Scan static map resolution vector */
2980 for (j = 0; j < vec_len (sm->to_resolve); j++)
2982 rp = sm->to_resolve + j;
2985 /* On this interface? */
2986 if (rp->sw_if_index == sw_if_index)
2988 /* Indetity mapping? */
2989 if (rp->l_addr.as_u32 == 0)
2990 l_addr.as_u32 = address[0].as_u32;
2992 l_addr.as_u32 = rp->l_addr.as_u32;
2993 /* Add the static mapping */
2994 rv = snat_add_static_mapping (l_addr,
3000 ~0 /* sw_if_index */,
3005 clib_warning ("snat_add_static_mapping returned %d",
3013 (void) snat_del_address(sm, address[0], 1, twice_nat);
3019 int snat_add_interface_address (snat_main_t *sm, u32 sw_if_index, int is_del,
3022 ip4_main_t * ip4_main = sm->ip4_main;
3023 ip4_address_t * first_int_addr;
3024 snat_static_map_resolve_t *rp;
3025 u32 *indices_to_delete = 0;
3027 u32 *auto_add_sw_if_indices =
3028 twice_nat ? sm->auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices;
3030 first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index,
3031 0 /* just want the address*/);
3033 for (i = 0; i < vec_len(auto_add_sw_if_indices); i++)
3035 if (auto_add_sw_if_indices[i] == sw_if_index)
3039 /* if have address remove it */
3041 (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat);
3044 for (j = 0; j < vec_len (sm->to_resolve); j++)
3046 rp = sm->to_resolve + j;
3047 if (rp->sw_if_index == sw_if_index)
3048 vec_add1 (indices_to_delete, j);
3050 if (vec_len(indices_to_delete))
3052 for (j = vec_len(indices_to_delete)-1; j >= 0; j--)
3053 vec_del1(sm->to_resolve, j);
3054 vec_free(indices_to_delete);
3058 vec_del1(sm->auto_add_sw_if_indices_twice_nat, i);
3060 vec_del1(sm->auto_add_sw_if_indices, i);
3063 return VNET_API_ERROR_VALUE_EXIST;
3070 return VNET_API_ERROR_NO_SUCH_ENTRY;
3072 /* add to the auto-address list */
3074 vec_add1(sm->auto_add_sw_if_indices_twice_nat, sw_if_index);
3076 vec_add1(sm->auto_add_sw_if_indices, sw_if_index);
3078 /* If the address is already bound - or static - add it now */
3080 snat_add_address (sm, first_int_addr, ~0, twice_nat);
3086 nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
3087 snat_protocol_t proto, u32 vrf_id, int is_in)
3089 snat_main_per_thread_data_t *tsm;
3090 clib_bihash_kv_8_8_t kv, value;
3092 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3093 snat_session_key_t key;
3095 clib_bihash_8_8_t *t;
3096 snat_user_key_t u_key;
3099 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3100 if (sm->num_workers > 1)
3102 vec_elt_at_index (sm->per_thread_data,
3103 sm->worker_in2out_cb (&ip, fib_index));
3105 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
3107 key.addr.as_u32 = addr->as_u32;
3108 key.port = clib_host_to_net_u16 (port);
3109 key.protocol = proto;
3110 key.fib_index = fib_index;
3111 kv.key = key.as_u64;
3112 t = is_in ? &tsm->in2out : &tsm->out2in;
3113 if (!clib_bihash_search_8_8 (t, &kv, &value))
3115 if (pool_is_free_index (tsm->sessions, value.value))
3116 return VNET_API_ERROR_UNSPECIFIED;
3118 s = pool_elt_at_index (tsm->sessions, value.value);
3119 kv.key = s->in2out.as_u64;
3120 clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 0);
3121 kv.key = s->out2in.as_u64;
3122 clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 0);
3123 u_key.addr = s->in2out.addr;
3124 u_key.fib_index = s->in2out.fib_index;
3125 kv.key = u_key.as_u64;
3126 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
3128 u = pool_elt_at_index (tsm->users, value.value);
3129 if (snat_is_session_static (s))
3130 u->nstaticsessions--;
3134 clib_dlist_remove (tsm->list_pool, s->per_user_index);
3135 pool_put_index (tsm->list_pool, s->per_user_index);
3136 pool_put (tsm->sessions, s);
3140 return VNET_API_ERROR_NO_SUCH_ENTRY;
3144 nat44_del_ed_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
3145 ip4_address_t *eh_addr, u16 eh_port, u8 proto,
3146 u32 vrf_id, int is_in)
3149 clib_bihash_16_8_t *t;
3150 nat_ed_ses_key_t key;
3151 clib_bihash_kv_16_8_t kv, value;
3153 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3156 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3157 if (sm->num_workers > 1)
3158 thread_index = sm->worker_in2out_cb (&ip, fib_index);
3160 thread_index = sm->num_workers;
3162 t = is_in ? &sm->in2out_ed : &sm->out2in_ed;
3163 key.l_addr.as_u32 = addr->as_u32;
3164 key.r_addr.as_u32 = eh_addr->as_u32;
3165 key.l_port = clib_host_to_net_u16 (port);
3166 key.r_port = clib_host_to_net_u16 (eh_port);
3168 key.fib_index = clib_host_to_net_u32 (fib_index);
3169 kv.key[0] = key.as_u64[0];
3170 kv.key[1] = key.as_u64[1];
3171 if (clib_bihash_search_16_8 (t, &kv, &value))
3172 return VNET_API_ERROR_NO_SUCH_ENTRY;
3174 if (pool_is_free_index (sm->per_thread_data[thread_index].sessions, value.value))
3175 return VNET_API_ERROR_UNSPECIFIED;
3176 s = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, value.value);
3177 nat_free_session_data (sm, s, thread_index);
3178 nat44_delete_session (sm, s, thread_index);
3183 nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length)
3185 snat_main_t *sm = &snat_main;
3187 sm->alloc_addr_and_port = nat_alloc_addr_and_port_mape;
3189 sm->psid_offset = psid_offset;
3190 sm->psid_length = psid_length;
3194 nat_set_alloc_addr_and_port_default (void)
3196 snat_main_t *sm = &snat_main;
3198 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;