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 <nat/nat_inlines.h>
31 #include <nat/nat_affinity.h>
32 #include <nat/nat_syslog.h>
33 #include <nat/nat_ha.h>
34 #include <vnet/fib/fib_table.h>
35 #include <vnet/fib/ip4_fib.h>
37 #include <vpp/app/version.h>
39 snat_main_t snat_main;
43 /* Hook up input features */
44 VNET_FEATURE_INIT (ip4_snat_in2out, static) = {
45 .arc_name = "ip4-unicast",
46 .node_name = "nat44-in2out",
47 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
49 VNET_FEATURE_INIT (ip4_snat_out2in, static) = {
50 .arc_name = "ip4-unicast",
51 .node_name = "nat44-out2in",
52 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
53 "ip4-dhcp-client-detect"),
55 VNET_FEATURE_INIT (ip4_nat_classify, static) = {
56 .arc_name = "ip4-unicast",
57 .node_name = "nat44-classify",
58 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
60 VNET_FEATURE_INIT (ip4_snat_det_in2out, static) = {
61 .arc_name = "ip4-unicast",
62 .node_name = "nat44-det-in2out",
63 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
65 VNET_FEATURE_INIT (ip4_snat_det_out2in, static) = {
66 .arc_name = "ip4-unicast",
67 .node_name = "nat44-det-out2in",
68 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
69 "ip4-dhcp-client-detect"),
71 VNET_FEATURE_INIT (ip4_nat_det_classify, static) = {
72 .arc_name = "ip4-unicast",
73 .node_name = "nat44-det-classify",
74 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
76 VNET_FEATURE_INIT (ip4_nat44_ed_in2out, static) = {
77 .arc_name = "ip4-unicast",
78 .node_name = "nat44-ed-in2out",
79 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
81 VNET_FEATURE_INIT (ip4_nat44_ed_out2in, static) = {
82 .arc_name = "ip4-unicast",
83 .node_name = "nat44-ed-out2in",
84 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
85 "ip4-dhcp-client-detect"),
87 VNET_FEATURE_INIT (ip4_nat44_ed_classify, static) = {
88 .arc_name = "ip4-unicast",
89 .node_name = "nat44-ed-classify",
90 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
92 VNET_FEATURE_INIT (ip4_snat_in2out_worker_handoff, static) = {
93 .arc_name = "ip4-unicast",
94 .node_name = "nat44-in2out-worker-handoff",
95 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
97 VNET_FEATURE_INIT (ip4_snat_out2in_worker_handoff, static) = {
98 .arc_name = "ip4-unicast",
99 .node_name = "nat44-out2in-worker-handoff",
100 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
101 "ip4-dhcp-client-detect"),
103 VNET_FEATURE_INIT (ip4_nat_handoff_classify, static) = {
104 .arc_name = "ip4-unicast",
105 .node_name = "nat44-handoff-classify",
106 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
108 VNET_FEATURE_INIT (ip4_snat_in2out_fast, static) = {
109 .arc_name = "ip4-unicast",
110 .node_name = "nat44-in2out-fast",
111 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
113 VNET_FEATURE_INIT (ip4_snat_out2in_fast, static) = {
114 .arc_name = "ip4-unicast",
115 .node_name = "nat44-out2in-fast",
116 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
117 "ip4-dhcp-client-detect"),
119 VNET_FEATURE_INIT (ip4_snat_hairpin_dst, static) = {
120 .arc_name = "ip4-unicast",
121 .node_name = "nat44-hairpin-dst",
122 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
124 VNET_FEATURE_INIT (ip4_nat44_ed_hairpin_dst, static) = {
125 .arc_name = "ip4-unicast",
126 .node_name = "nat44-ed-hairpin-dst",
127 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
130 /* Hook up output features */
131 VNET_FEATURE_INIT (ip4_snat_in2out_output, static) = {
132 .arc_name = "ip4-output",
133 .node_name = "nat44-in2out-output",
134 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
136 VNET_FEATURE_INIT (ip4_snat_in2out_output_worker_handoff, static) = {
137 .arc_name = "ip4-output",
138 .node_name = "nat44-in2out-output-worker-handoff",
139 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
141 VNET_FEATURE_INIT (ip4_snat_hairpin_src, static) = {
142 .arc_name = "ip4-output",
143 .node_name = "nat44-hairpin-src",
144 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
146 VNET_FEATURE_INIT (ip4_nat44_ed_in2out_output, static) = {
147 .arc_name = "ip4-output",
148 .node_name = "nat44-ed-in2out-output",
149 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
151 VNET_FEATURE_INIT (ip4_nat44_ed_hairpin_src, static) = {
152 .arc_name = "ip4-output",
153 .node_name = "nat44-ed-hairpin-src",
154 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
157 /* Hook up ip4-local features */
158 VNET_FEATURE_INIT (ip4_nat_hairpinning, static) =
160 .arc_name = "ip4-local",
161 .node_name = "nat44-hairpinning",
162 .runs_before = VNET_FEATURES("ip4-local-end-of-arc"),
164 VNET_FEATURE_INIT (ip4_nat44_ed_hairpinning, static) =
166 .arc_name = "ip4-local",
167 .node_name = "nat44-ed-hairpinning",
168 .runs_before = VNET_FEATURES("ip4-local-end-of-arc"),
172 VLIB_PLUGIN_REGISTER () = {
173 .version = VPP_BUILD_VER,
174 .description = "Network Address Translation",
179 nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index,
182 snat_session_key_t key;
183 clib_bihash_kv_8_8_t kv;
184 nat_ed_ses_key_t ed_key;
185 clib_bihash_kv_16_8_t ed_kv;
186 snat_main_per_thread_data_t *tsm =
187 vec_elt_at_index (sm->per_thread_data, thread_index);
189 if (is_fwd_bypass_session (s))
191 ed_key.l_addr = s->in2out.addr;
192 ed_key.r_addr = s->ext_host_addr;
193 ed_key.l_port = s->in2out.port;
194 ed_key.r_port = s->ext_host_port;
195 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
196 ed_key.fib_index = 0;
197 ed_kv.key[0] = ed_key.as_u64[0];
198 ed_kv.key[1] = ed_key.as_u64[1];
199 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
200 nat_log_warn ("in2out_ed key del failed");
204 /* session lookup tables */
205 if (is_ed_session (s))
207 if (is_affinity_sessions (s))
208 nat_affinity_unlock (s->ext_host_addr, s->out2in.addr,
209 s->in2out.protocol, s->out2in.port);
210 ed_key.l_addr = s->out2in.addr;
211 ed_key.r_addr = s->ext_host_addr;
212 ed_key.fib_index = s->out2in.fib_index;
213 if (snat_is_unk_proto_session (s))
215 ed_key.proto = s->in2out.port;
221 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
222 ed_key.l_port = s->out2in.port;
223 ed_key.r_port = s->ext_host_port;
225 ed_kv.key[0] = ed_key.as_u64[0];
226 ed_kv.key[1] = ed_key.as_u64[1];
227 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
228 nat_log_warn ("out2in_ed key del failed");
229 ed_key.l_addr = s->in2out.addr;
230 ed_key.fib_index = s->in2out.fib_index;
231 if (!snat_is_unk_proto_session (s))
232 ed_key.l_port = s->in2out.port;
233 if (is_twice_nat_session (s))
235 ed_key.r_addr = s->ext_host_nat_addr;
236 ed_key.r_port = s->ext_host_nat_port;
238 ed_kv.key[0] = ed_key.as_u64[0];
239 ed_kv.key[1] = ed_key.as_u64[1];
240 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
241 nat_log_warn ("in2out_ed key del failed");
244 nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
245 &s->in2out.addr, s->in2out.port,
246 &s->ext_host_nat_addr, s->ext_host_nat_port,
247 &s->out2in.addr, s->out2in.port,
248 &s->ext_host_addr, s->ext_host_port,
249 s->in2out.protocol, is_twice_nat_session (s));
253 kv.key = s->in2out.as_u64;
254 if (clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 0))
255 nat_log_warn ("in2out key del failed");
256 kv.key = s->out2in.as_u64;
257 if (clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 0))
258 nat_log_warn ("out2in key del failed");
261 nat_syslog_nat44_apmdel (s->user_index, s->in2out.fib_index,
262 &s->in2out.addr, s->in2out.port,
263 &s->out2in.addr, s->out2in.port,
267 if (snat_is_unk_proto_session (s))
273 snat_ipfix_logging_nat44_ses_delete (thread_index,
274 s->in2out.addr.as_u32,
275 s->out2in.addr.as_u32,
279 s->in2out.fib_index);
281 nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
282 s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
286 /* Twice NAT address and port for external host */
287 if (is_twice_nat_session (s))
289 key.protocol = s->in2out.protocol;
290 key.port = s->ext_host_nat_port;
291 key.addr.as_u32 = s->ext_host_nat_addr.as_u32;
292 snat_free_outside_address_and_port (sm->twice_nat_addresses,
296 if (snat_is_session_static (s))
299 snat_free_outside_address_and_port (sm->addresses, thread_index,
304 nat_user_get_or_create (snat_main_t * sm, ip4_address_t * addr, u32 fib_index,
308 snat_user_key_t user_key;
309 clib_bihash_kv_8_8_t kv, value;
310 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
311 dlist_elt_t *per_user_list_head_elt;
313 user_key.addr.as_u32 = addr->as_u32;
314 user_key.fib_index = fib_index;
315 kv.key = user_key.as_u64;
317 /* Ever heard of the "user" = src ip4 address before? */
318 if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
320 /* no, make a new one */
321 pool_get (tsm->users, u);
322 clib_memset (u, 0, sizeof (*u));
323 u->addr.as_u32 = addr->as_u32;
324 u->fib_index = fib_index;
326 pool_get (tsm->list_pool, per_user_list_head_elt);
328 u->sessions_per_user_list_head_index = per_user_list_head_elt -
331 clib_dlist_init (tsm->list_pool, u->sessions_per_user_list_head_index);
333 kv.value = u - tsm->users;
336 if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1))
337 nat_log_warn ("user_hash keay add failed");
339 vlib_set_simple_counter (&sm->total_users, thread_index, 0,
340 pool_elts (tsm->users));
344 u = pool_elt_at_index (tsm->users, value.value);
351 nat_session_alloc_or_recycle (snat_main_t * sm, snat_user_t * u,
352 u32 thread_index, f64 now)
355 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
356 u32 oldest_per_user_translation_list_index, session_index;
357 dlist_elt_t *oldest_per_user_translation_list_elt;
358 dlist_elt_t *per_user_translation_list_elt;
360 /* Over quota? Recycle the least recently used translation */
361 if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
363 oldest_per_user_translation_list_index =
364 clib_dlist_remove_head (tsm->list_pool,
365 u->sessions_per_user_list_head_index);
367 ASSERT (oldest_per_user_translation_list_index != ~0);
369 /* Add it back to the end of the LRU list */
370 clib_dlist_addtail (tsm->list_pool,
371 u->sessions_per_user_list_head_index,
372 oldest_per_user_translation_list_index);
373 /* Get the list element */
374 oldest_per_user_translation_list_elt =
375 pool_elt_at_index (tsm->list_pool,
376 oldest_per_user_translation_list_index);
378 /* Get the session index from the list element */
379 session_index = oldest_per_user_translation_list_elt->value;
381 /* Get the session */
382 s = pool_elt_at_index (tsm->sessions, session_index);
383 nat_free_session_data (sm, s, thread_index, 0);
384 if (snat_is_session_static (s))
385 u->nstaticsessions--;
392 s->ext_host_addr.as_u32 = 0;
393 s->ext_host_port = 0;
394 s->ext_host_nat_addr.as_u32 = 0;
395 s->ext_host_nat_port = 0;
399 pool_get (tsm->sessions, s);
400 clib_memset (s, 0, sizeof (*s));
402 /* Create list elts */
403 pool_get (tsm->list_pool, per_user_translation_list_elt);
404 clib_dlist_init (tsm->list_pool,
405 per_user_translation_list_elt - tsm->list_pool);
407 per_user_translation_list_elt->value = s - tsm->sessions;
408 s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
409 s->per_user_list_head_index = u->sessions_per_user_list_head_index;
411 clib_dlist_addtail (tsm->list_pool,
412 s->per_user_list_head_index,
413 per_user_translation_list_elt - tsm->list_pool);
415 s->user_index = u - tsm->users;
416 vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
417 pool_elts (tsm->sessions));
420 s->ha_last_refreshed = now;
426 nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index,
430 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
431 dlist_elt_t *per_user_translation_list_elt, *oldest_elt;
433 u64 sess_timeout_time;
435 if (PREDICT_FALSE (!(u->nsessions) && !(u->nstaticsessions)))
439 clib_dlist_remove_head (tsm->list_pool,
440 u->sessions_per_user_list_head_index);
441 oldest_elt = pool_elt_at_index (tsm->list_pool, oldest_index);
442 s = pool_elt_at_index (tsm->sessions, oldest_elt->value);
443 sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
444 if (now >= sess_timeout_time)
446 clib_dlist_addtail (tsm->list_pool,
447 u->sessions_per_user_list_head_index, oldest_index);
448 nat_free_session_data (sm, s, thread_index, 0);
449 if (snat_is_session_static (s))
450 u->nstaticsessions--;
457 s->ext_host_addr.as_u32 = 0;
458 s->ext_host_port = 0;
459 s->ext_host_nat_addr.as_u32 = 0;
460 s->ext_host_nat_port = 0;
464 clib_dlist_addhead (tsm->list_pool,
465 u->sessions_per_user_list_head_index, oldest_index);
466 if ((u->nsessions + u->nstaticsessions) >=
467 sm->max_translations_per_user)
469 nat_log_warn ("max translations per user %U", format_ip4_address,
471 snat_ipfix_logging_max_entries_per_user
472 (thread_index, sm->max_translations_per_user, u->addr.as_u32);
478 pool_get (tsm->sessions, s);
479 clib_memset (s, 0, sizeof (*s));
481 /* Create list elts */
482 pool_get (tsm->list_pool, per_user_translation_list_elt);
483 clib_dlist_init (tsm->list_pool,
484 per_user_translation_list_elt - tsm->list_pool);
486 per_user_translation_list_elt->value = s - tsm->sessions;
487 s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
488 s->per_user_list_head_index = u->sessions_per_user_list_head_index;
490 clib_dlist_addtail (tsm->list_pool,
491 s->per_user_list_head_index,
492 per_user_translation_list_elt - tsm->list_pool);
495 vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
496 pool_elts (tsm->sessions));
499 s->ha_last_refreshed = now;
505 snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index,
508 fib_prefix_t prefix = {
510 .fp_proto = FIB_PROTOCOL_IP4,
512 .ip4.as_u32 = addr->as_u32,
515 u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
518 fib_table_entry_update_one_path (fib_index,
520 FIB_SOURCE_PLUGIN_LOW,
521 (FIB_ENTRY_FLAG_CONNECTED |
522 FIB_ENTRY_FLAG_LOCAL |
523 FIB_ENTRY_FLAG_EXCLUSIVE),
527 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
529 fib_table_entry_delete (fib_index, &prefix, FIB_SOURCE_PLUGIN_LOW);
533 snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id,
538 vlib_thread_main_t *tm = vlib_get_thread_main ();
540 if (twice_nat && !sm->endpoint_dependent)
541 return VNET_API_ERROR_FEATURE_DISABLED;
543 /* Check if address already exists */
545 vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses)
547 if (ap->addr.as_u32 == addr->as_u32)
548 return VNET_API_ERROR_VALUE_EXIST;
553 vec_add2 (sm->twice_nat_addresses, ap, 1);
555 vec_add2 (sm->addresses, ap, 1);
560 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
561 FIB_SOURCE_PLUGIN_LOW);
564 #define _(N, i, n, s) \
565 clib_bitmap_alloc (ap->busy_##n##_port_bitmap, 65535); \
566 ap->busy_##n##_ports = 0; \
567 ap->busy_##n##_ports_per_thread = 0;\
568 vec_validate_init_empty (ap->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
569 foreach_snat_protocol
574 /* Add external address to FIB */
576 pool_foreach (i, sm->interfaces,
578 if (nat_interface_is_inside(i) || sm->out2in_dpo)
581 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
584 pool_foreach (i, sm->output_feature_interfaces,
586 if (nat_interface_is_inside(i) || sm->out2in_dpo)
589 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
598 is_snat_address_used_in_static_mapping (snat_main_t * sm, ip4_address_t addr)
600 snat_static_mapping_t *m;
602 pool_foreach (m, sm->static_mappings,
604 if (is_addr_only_static_mapping (m) ||
605 is_out2in_only_static_mapping (m) ||
606 is_identity_static_mapping (m))
608 if (m->external_addr.as_u32 == addr.as_u32)
617 increment_v4_address (ip4_address_t * a)
621 v = clib_net_to_host_u32 (a->as_u32) + 1;
622 a->as_u32 = clib_host_to_net_u32 (v);
626 snat_add_static_mapping_when_resolved (snat_main_t * sm,
627 ip4_address_t l_addr,
632 snat_protocol_t proto,
633 int addr_only, int is_add, u8 * tag,
634 int twice_nat, int out2in_only,
637 snat_static_map_resolve_t *rp;
639 vec_add2 (sm->to_resolve, rp, 1);
640 rp->l_addr.as_u32 = l_addr.as_u32;
642 rp->sw_if_index = sw_if_index;
646 rp->addr_only = addr_only;
648 rp->twice_nat = twice_nat;
649 rp->out2in_only = out2in_only;
650 rp->identity_nat = identity_nat;
651 rp->tag = vec_dup (tag);
655 get_thread_idx_by_port (u16 e_port)
657 snat_main_t *sm = &snat_main;
658 u32 thread_idx = sm->num_workers;
659 if (sm->num_workers > 1)
662 sm->first_worker_index +
663 sm->workers[(e_port - 1024) / sm->port_per_thread];
669 snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
670 u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
671 u32 sw_if_index, snat_protocol_t proto, int is_add,
672 twice_nat_type_t twice_nat, u8 out2in_only, u8 * tag,
675 snat_main_t *sm = &snat_main;
676 snat_static_mapping_t *m;
677 snat_session_key_t m_key;
678 clib_bihash_kv_8_8_t kv, value;
679 snat_address_t *a = 0;
681 snat_interface_t *interface;
683 snat_main_per_thread_data_t *tsm;
684 snat_user_key_t u_key;
686 dlist_elt_t *head, *elt;
687 u32 elt_index, head_index;
691 snat_static_map_resolve_t *rp, *rp_match = 0;
692 nat44_lb_addr_port_t *local;
695 if (!sm->endpoint_dependent)
697 if (twice_nat || out2in_only)
698 return VNET_API_ERROR_FEATURE_DISABLED;
701 /* If the external address is a specific interface address */
702 if (sw_if_index != ~0)
704 ip4_address_t *first_int_addr;
706 for (i = 0; i < vec_len (sm->to_resolve); i++)
708 rp = sm->to_resolve + i;
709 if (rp->sw_if_index != sw_if_index ||
710 rp->l_addr.as_u32 != l_addr.as_u32 ||
711 rp->vrf_id != vrf_id || rp->addr_only != addr_only)
716 if ((rp->l_port != l_port && rp->e_port != e_port)
717 || rp->proto != proto)
725 /* Might be already set... */
726 first_int_addr = ip4_interface_first_address
727 (sm->ip4_main, sw_if_index, 0 /* just want the address */ );
732 return VNET_API_ERROR_VALUE_EXIST;
734 snat_add_static_mapping_when_resolved
735 (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
736 addr_only, is_add, tag, twice_nat, out2in_only, identity_nat);
738 /* DHCP resolution required? */
739 if (first_int_addr == 0)
745 e_addr.as_u32 = first_int_addr->as_u32;
746 /* Identity mapping? */
747 if (l_addr.as_u32 == 0)
748 l_addr.as_u32 = e_addr.as_u32;
754 return VNET_API_ERROR_NO_SUCH_ENTRY;
756 vec_del1 (sm->to_resolve, i);
760 e_addr.as_u32 = first_int_addr->as_u32;
761 /* Identity mapping? */
762 if (l_addr.as_u32 == 0)
763 l_addr.as_u32 = e_addr.as_u32;
771 m_key.port = addr_only ? 0 : e_port;
772 m_key.protocol = addr_only ? 0 : proto;
774 kv.key = m_key.as_u64;
775 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
778 m = pool_elt_at_index (sm->static_mappings, value.value);
784 if (is_identity_static_mapping (m))
787 pool_foreach (local, m->locals,
789 if (local->vrf_id == vrf_id)
790 return VNET_API_ERROR_VALUE_EXIST;
793 pool_get (m->locals, local);
794 local->vrf_id = vrf_id;
796 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
797 FIB_SOURCE_PLUGIN_LOW);
798 m_key.addr = m->local_addr;
799 m_key.port = m->local_port;
800 m_key.protocol = m->proto;
801 m_key.fib_index = local->fib_index;
802 kv.key = m_key.as_u64;
803 kv.value = m - sm->static_mappings;
804 clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1);
808 return VNET_API_ERROR_VALUE_EXIST;
811 if (twice_nat && addr_only)
812 return VNET_API_ERROR_UNSUPPORTED;
814 /* Convert VRF id to FIB index */
817 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
818 FIB_SOURCE_PLUGIN_LOW);
819 /* If not specified use inside VRF id from SNAT plugin startup config */
822 fib_index = sm->inside_fib_index;
823 vrf_id = sm->inside_vrf_id;
826 if (!(out2in_only || identity_nat))
829 m_key.port = addr_only ? 0 : l_port;
830 m_key.protocol = addr_only ? 0 : proto;
831 m_key.fib_index = fib_index;
832 kv.key = m_key.as_u64;
833 if (!clib_bihash_search_8_8
834 (&sm->static_mapping_by_local, &kv, &value))
835 return VNET_API_ERROR_VALUE_EXIST;
838 /* Find external address in allocated addresses and reserve port for
839 address and port pair mapping when dynamic translations enabled */
840 if (!(addr_only || sm->static_mapping_only || out2in_only))
842 for (i = 0; i < vec_len (sm->addresses); i++)
844 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
846 a = sm->addresses + i;
847 /* External port must be unused */
850 #define _(N, j, n, s) \
851 case SNAT_PROTOCOL_##N: \
852 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
853 return VNET_API_ERROR_INVALID_VALUE; \
854 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
857 a->busy_##n##_ports++; \
858 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \
861 foreach_snat_protocol
864 nat_log_info ("unknown protocol");
865 return VNET_API_ERROR_INVALID_VALUE_2;
870 /* External address must be allocated */
871 if (!a && (l_addr.as_u32 != e_addr.as_u32))
873 if (sw_if_index != ~0)
875 for (i = 0; i < vec_len (sm->to_resolve); i++)
877 rp = sm->to_resolve + i;
880 if (rp->sw_if_index != sw_if_index &&
881 rp->l_addr.as_u32 != l_addr.as_u32 &&
882 rp->vrf_id != vrf_id && rp->l_port != l_port &&
883 rp->e_port != e_port && rp->proto != proto)
886 vec_del1 (sm->to_resolve, i);
890 return VNET_API_ERROR_NO_SUCH_ENTRY;
894 pool_get (sm->static_mappings, m);
895 clib_memset (m, 0, sizeof (*m));
896 m->tag = vec_dup (tag);
897 m->local_addr = l_addr;
898 m->external_addr = e_addr;
899 m->twice_nat = twice_nat;
901 m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY;
903 m->flags |= NAT_STATIC_MAPPING_FLAG_ADDR_ONLY;
906 m->flags |= NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT;
907 pool_get (m->locals, local);
908 local->vrf_id = vrf_id;
909 local->fib_index = fib_index;
914 m->fib_index = fib_index;
918 m->local_port = l_port;
919 m->external_port = e_port;
923 if (sm->num_workers > 1)
926 .src_address = m->local_addr,
928 vec_add1 (m->workers, sm->worker_in2out_cb (&ip, m->fib_index));
929 tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
932 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
934 m_key.addr = m->local_addr;
935 m_key.port = m->local_port;
936 m_key.protocol = m->proto;
937 m_key.fib_index = fib_index;
938 kv.key = m_key.as_u64;
939 kv.value = m - sm->static_mappings;
941 clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1);
943 m_key.addr = m->external_addr;
944 m_key.port = m->external_port;
946 kv.key = m_key.as_u64;
947 kv.value = m - sm->static_mappings;
948 clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1);
950 /* Delete dynamic sessions matching local address (+ local port) */
951 if (!(sm->static_mapping_only))
953 u_key.addr = m->local_addr;
954 u_key.fib_index = m->fib_index;
955 kv.key = u_key.as_u64;
956 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
958 user_index = value.value;
959 u = pool_elt_at_index (tsm->users, user_index);
962 head_index = u->sessions_per_user_list_head_index;
963 head = pool_elt_at_index (tsm->list_pool, head_index);
964 elt_index = head->next;
965 elt = pool_elt_at_index (tsm->list_pool, elt_index);
966 ses_index = elt->value;
967 while (ses_index != ~0)
969 s = pool_elt_at_index (tsm->sessions, ses_index);
970 elt = pool_elt_at_index (tsm->list_pool, elt->next);
971 ses_index = elt->value;
973 if (snat_is_session_static (s))
977 && (clib_net_to_host_u16 (s->in2out.port) !=
981 nat_free_session_data (sm, s,
982 tsm - sm->per_thread_data, 0);
983 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
985 if (!addr_only && !sm->endpoint_dependent)
996 if (sw_if_index != ~0)
999 return VNET_API_ERROR_NO_SUCH_ENTRY;
1005 vrf_id = sm->inside_vrf_id;
1008 pool_foreach (local, m->locals,
1010 if (local->vrf_id == vrf_id)
1011 find = local - m->locals;
1015 return VNET_API_ERROR_NO_SUCH_ENTRY;
1017 local = pool_elt_at_index (m->locals, find);
1018 fib_index = local->fib_index;
1019 pool_put (m->locals, local);
1022 fib_index = m->fib_index;
1024 /* Free external address port */
1025 if (!(addr_only || sm->static_mapping_only || out2in_only))
1027 for (i = 0; i < vec_len (sm->addresses); i++)
1029 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1031 a = sm->addresses + i;
1034 #define _(N, j, n, s) \
1035 case SNAT_PROTOCOL_##N: \
1036 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1037 if (e_port > 1024) \
1039 a->busy_##n##_ports--; \
1040 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \
1043 foreach_snat_protocol
1046 nat_log_info ("unknown protocol");
1047 return VNET_API_ERROR_INVALID_VALUE_2;
1054 if (sm->num_workers > 1)
1055 tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
1057 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1059 m_key.addr = m->local_addr;
1060 m_key.port = m->local_port;
1061 m_key.protocol = m->proto;
1062 m_key.fib_index = fib_index;
1063 kv.key = m_key.as_u64;
1065 clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0);
1067 /* Delete session(s) for static mapping if exist */
1068 if (!(sm->static_mapping_only) ||
1069 (sm->static_mapping_only && sm->static_mapping_connection_tracking))
1071 u_key.addr = m->local_addr;
1072 u_key.fib_index = fib_index;
1073 kv.key = u_key.as_u64;
1074 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1076 user_index = value.value;
1077 u = pool_elt_at_index (tsm->users, user_index);
1078 if (u->nstaticsessions)
1080 head_index = u->sessions_per_user_list_head_index;
1081 head = pool_elt_at_index (tsm->list_pool, head_index);
1082 elt_index = head->next;
1083 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1084 ses_index = elt->value;
1085 while (ses_index != ~0)
1087 s = pool_elt_at_index (tsm->sessions, ses_index);
1088 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1089 ses_index = elt->value;
1093 if ((s->out2in.addr.as_u32 != e_addr.as_u32) ||
1094 (clib_net_to_host_u16 (s->out2in.port) !=
1099 if (is_lb_session (s))
1102 if (!snat_is_session_static (s))
1105 nat_free_session_data (sm, s,
1106 tsm - sm->per_thread_data, 0);
1107 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1109 if (!addr_only && !sm->endpoint_dependent)
1116 fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_PLUGIN_LOW);
1117 if (pool_elts (m->locals))
1120 m_key.addr = m->external_addr;
1121 m_key.port = m->external_port;
1122 m_key.fib_index = 0;
1123 kv.key = m_key.as_u64;
1124 clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0);
1127 vec_free (m->workers);
1128 /* Delete static mapping from pool */
1129 pool_put (sm->static_mappings, m);
1132 if (!addr_only || (l_addr.as_u32 == e_addr.as_u32))
1135 /* Add/delete external address to FIB */
1137 pool_foreach (interface, sm->interfaces,
1139 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1142 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1145 pool_foreach (interface, sm->output_feature_interfaces,
1147 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1150 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1159 nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
1160 snat_protocol_t proto,
1161 nat44_lb_addr_port_t * locals, u8 is_add,
1162 twice_nat_type_t twice_nat, u8 out2in_only,
1163 u8 * tag, u32 affinity)
1165 snat_main_t *sm = &snat_main;
1166 snat_static_mapping_t *m;
1167 snat_session_key_t m_key;
1168 clib_bihash_kv_8_8_t kv, value;
1169 snat_address_t *a = 0;
1171 nat44_lb_addr_port_t *local;
1172 u32 elt_index, head_index, ses_index;
1173 snat_main_per_thread_data_t *tsm;
1174 snat_user_key_t u_key;
1177 dlist_elt_t *head, *elt;
1180 if (!sm->endpoint_dependent)
1181 return VNET_API_ERROR_FEATURE_DISABLED;
1183 m_key.addr = e_addr;
1184 m_key.port = e_port;
1185 m_key.protocol = proto;
1186 m_key.fib_index = 0;
1187 kv.key = m_key.as_u64;
1188 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
1191 m = pool_elt_at_index (sm->static_mappings, value.value);
1196 return VNET_API_ERROR_VALUE_EXIST;
1198 if (vec_len (locals) < 2)
1199 return VNET_API_ERROR_INVALID_VALUE;
1201 /* Find external address in allocated addresses and reserve port for
1202 address and port pair mapping when dynamic translations enabled */
1203 if (!(sm->static_mapping_only || out2in_only))
1205 for (i = 0; i < vec_len (sm->addresses); i++)
1207 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1209 a = sm->addresses + i;
1210 /* External port must be unused */
1213 #define _(N, j, n, s) \
1214 case SNAT_PROTOCOL_##N: \
1215 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
1216 return VNET_API_ERROR_INVALID_VALUE; \
1217 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
1218 if (e_port > 1024) \
1220 a->busy_##n##_ports++; \
1221 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \
1224 foreach_snat_protocol
1227 nat_log_info ("unknown protocol");
1228 return VNET_API_ERROR_INVALID_VALUE_2;
1233 /* External address must be allocated */
1235 return VNET_API_ERROR_NO_SUCH_ENTRY;
1238 pool_get (sm->static_mappings, m);
1239 clib_memset (m, 0, sizeof (*m));
1240 m->tag = vec_dup (tag);
1241 m->external_addr = e_addr;
1242 m->external_port = e_port;
1244 m->twice_nat = twice_nat;
1245 m->flags |= NAT_STATIC_MAPPING_FLAG_LB;
1247 m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY;
1248 m->affinity = affinity;
1251 m->affinity_per_service_list_head_index =
1252 nat_affinity_get_per_service_list_head_index ();
1254 m->affinity_per_service_list_head_index = ~0;
1256 m_key.addr = m->external_addr;
1257 m_key.port = m->external_port;
1258 m_key.protocol = m->proto;
1259 m_key.fib_index = 0;
1260 kv.key = m_key.as_u64;
1261 kv.value = m - sm->static_mappings;
1262 if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1))
1264 nat_log_err ("static_mapping_by_external key add failed");
1265 return VNET_API_ERROR_UNSPECIFIED;
1268 m_key.fib_index = m->fib_index;
1269 for (i = 0; i < vec_len (locals); i++)
1271 locals[i].fib_index =
1272 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
1274 FIB_SOURCE_PLUGIN_LOW);
1275 m_key.addr = locals[i].addr;
1276 m_key.fib_index = locals[i].fib_index;
1279 m_key.port = locals[i].port;
1280 kv.key = m_key.as_u64;
1281 kv.value = m - sm->static_mappings;
1282 clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1);
1284 locals[i].prefix = (i == 0) ? locals[i].probability :
1285 (locals[i - 1].prefix + locals[i].probability);
1286 pool_get (m->locals, local);
1288 if (sm->num_workers > 1)
1291 .src_address = locals[i].addr,
1294 clib_bitmap_set (bitmap,
1295 sm->worker_in2out_cb (&ip, m->fib_index), 1);
1299 /* Assign workers */
1300 if (sm->num_workers > 1)
1303 clib_bitmap_foreach (i, bitmap,
1305 vec_add1(m->workers, i);
1313 return VNET_API_ERROR_NO_SUCH_ENTRY;
1315 if (!is_lb_static_mapping (m))
1316 return VNET_API_ERROR_INVALID_VALUE;
1318 /* Free external address port */
1319 if (!(sm->static_mapping_only || out2in_only))
1321 for (i = 0; i < vec_len (sm->addresses); i++)
1323 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1325 a = sm->addresses + i;
1328 #define _(N, j, n, s) \
1329 case SNAT_PROTOCOL_##N: \
1330 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1331 if (e_port > 1024) \
1333 a->busy_##n##_ports--; \
1334 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \
1337 foreach_snat_protocol
1340 nat_log_info ("unknown protocol");
1341 return VNET_API_ERROR_INVALID_VALUE_2;
1348 m_key.addr = m->external_addr;
1349 m_key.port = m->external_port;
1350 m_key.protocol = m->proto;
1351 m_key.fib_index = 0;
1352 kv.key = m_key.as_u64;
1353 if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0))
1355 nat_log_err ("static_mapping_by_external key del failed");
1356 return VNET_API_ERROR_UNSPECIFIED;
1360 pool_foreach (local, m->locals,
1362 fib_table_unlock (local->fib_index, FIB_PROTOCOL_IP4,
1363 FIB_SOURCE_PLUGIN_LOW);
1364 m_key.addr = local->addr;
1367 m_key.port = local->port;
1368 m_key.fib_index = local->fib_index;
1369 kv.key = m_key.as_u64;
1370 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0))
1372 nat_log_err ("static_mapping_by_local key del failed");
1373 return VNET_API_ERROR_UNSPECIFIED;
1377 if (sm->num_workers > 1)
1380 .src_address = local->addr,
1382 tsm = vec_elt_at_index (sm->per_thread_data,
1383 sm->worker_in2out_cb (&ip, m->fib_index));
1386 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1388 /* Delete sessions */
1389 u_key.addr = local->addr;
1390 u_key.fib_index = local->fib_index;
1391 kv.key = u_key.as_u64;
1392 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1394 u = pool_elt_at_index (tsm->users, value.value);
1395 if (u->nstaticsessions)
1397 head_index = u->sessions_per_user_list_head_index;
1398 head = pool_elt_at_index (tsm->list_pool, head_index);
1399 elt_index = head->next;
1400 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1401 ses_index = elt->value;
1402 while (ses_index != ~0)
1404 s = pool_elt_at_index (tsm->sessions, ses_index);
1405 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1406 ses_index = elt->value;
1408 if (!(is_lb_session (s)))
1411 if ((s->in2out.addr.as_u32 != local->addr.as_u32) ||
1412 (clib_net_to_host_u16 (s->in2out.port) != local->port))
1415 nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
1416 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1423 nat_affinity_flush_service (m->affinity_per_service_list_head_index);
1424 pool_free (m->locals);
1426 vec_free (m->workers);
1428 pool_put (sm->static_mappings, m);
1435 nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port,
1436 ip4_address_t l_addr, u16 l_port,
1437 snat_protocol_t proto, u32 vrf_id,
1438 u8 probability, u8 is_add)
1440 snat_main_t *sm = &snat_main;
1441 snat_static_mapping_t *m = 0;
1442 snat_session_key_t m_key;
1443 clib_bihash_kv_8_8_t kv, value;
1444 nat44_lb_addr_port_t *local, *prev_local, *match_local = 0;
1445 snat_main_per_thread_data_t *tsm;
1446 snat_user_key_t u_key;
1449 dlist_elt_t *head, *elt;
1450 u32 elt_index, head_index, ses_index, *locals = 0;
1454 if (!sm->endpoint_dependent)
1455 return VNET_API_ERROR_FEATURE_DISABLED;
1457 m_key.addr = e_addr;
1458 m_key.port = e_port;
1459 m_key.protocol = proto;
1460 m_key.fib_index = 0;
1461 kv.key = m_key.as_u64;
1462 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
1463 m = pool_elt_at_index (sm->static_mappings, value.value);
1466 return VNET_API_ERROR_NO_SUCH_ENTRY;
1468 if (!is_lb_static_mapping (m))
1469 return VNET_API_ERROR_INVALID_VALUE;
1472 pool_foreach (local, m->locals,
1474 if ((local->addr.as_u32 == l_addr.as_u32) && (local->port == l_port) &&
1475 (local->vrf_id == vrf_id))
1477 match_local = local;
1486 return VNET_API_ERROR_VALUE_EXIST;
1488 pool_get (m->locals, local);
1489 clib_memset (local, 0, sizeof (*local));
1490 local->addr.as_u32 = l_addr.as_u32;
1491 local->port = l_port;
1492 local->probability = probability;
1493 local->vrf_id = vrf_id;
1495 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
1496 FIB_SOURCE_PLUGIN_LOW);
1498 if (!is_out2in_only_static_mapping (m))
1500 m_key.addr = l_addr;
1501 m_key.port = l_port;
1502 m_key.fib_index = local->fib_index;
1503 kv.key = m_key.as_u64;
1504 kv.value = m - sm->static_mappings;
1505 if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1))
1506 nat_log_err ("static_mapping_by_local key add failed");
1512 return VNET_API_ERROR_NO_SUCH_ENTRY;
1514 if (pool_elts (m->locals) < 3)
1515 return VNET_API_ERROR_UNSPECIFIED;
1517 fib_table_unlock (match_local->fib_index, FIB_PROTOCOL_IP4,
1518 FIB_SOURCE_PLUGIN_LOW);
1520 if (!is_out2in_only_static_mapping (m))
1522 m_key.addr = l_addr;
1523 m_key.port = l_port;
1524 m_key.fib_index = match_local->fib_index;
1525 kv.key = m_key.as_u64;
1526 if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0))
1527 nat_log_err ("static_mapping_by_local key del failed");
1530 if (sm->num_workers > 1)
1533 .src_address = local->addr,
1535 tsm = vec_elt_at_index (sm->per_thread_data,
1536 sm->worker_in2out_cb (&ip, m->fib_index));
1539 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1541 /* Delete sessions */
1542 u_key.addr = match_local->addr;
1543 u_key.fib_index = match_local->fib_index;
1544 kv.key = u_key.as_u64;
1545 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1547 u = pool_elt_at_index (tsm->users, value.value);
1548 if (u->nstaticsessions)
1550 head_index = u->sessions_per_user_list_head_index;
1551 head = pool_elt_at_index (tsm->list_pool, head_index);
1552 elt_index = head->next;
1553 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1554 ses_index = elt->value;
1555 while (ses_index != ~0)
1557 s = pool_elt_at_index (tsm->sessions, ses_index);
1558 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1559 ses_index = elt->value;
1561 if (!(is_lb_session (s)))
1564 if ((s->in2out.addr.as_u32 != match_local->addr.as_u32) ||
1565 (clib_net_to_host_u16 (s->in2out.port) !=
1569 nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
1570 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1575 pool_put (m->locals, match_local);
1578 vec_free (m->workers);
1581 pool_foreach (local, m->locals,
1583 vec_add1 (locals, local - m->locals);
1584 if (sm->num_workers > 1)
1587 ip.src_address.as_u32 = local->addr.as_u32,
1588 bitmap = clib_bitmap_set (bitmap,
1589 sm->worker_in2out_cb (&ip, local->fib_index),
1595 ASSERT (vec_len (locals) > 1);
1597 local = pool_elt_at_index (m->locals, locals[0]);
1598 local->prefix = local->probability;
1599 for (i = 1; i < vec_len (locals); i++)
1601 local = pool_elt_at_index (m->locals, locals[i]);
1602 prev_local = pool_elt_at_index (m->locals, locals[i - 1]);
1603 local->prefix = local->probability + prev_local->prefix;
1606 /* Assign workers */
1607 if (sm->num_workers > 1)
1610 clib_bitmap_foreach (i, bitmap, ({ vec_add1(m->workers, i); }));
1618 snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm,
1621 snat_address_t *a = 0;
1622 snat_session_t *ses;
1623 u32 *ses_to_be_removed = 0, *ses_index;
1624 snat_main_per_thread_data_t *tsm;
1625 snat_static_mapping_t *m;
1626 snat_interface_t *interface;
1628 snat_address_t *addresses =
1629 twice_nat ? sm->twice_nat_addresses : sm->addresses;
1631 /* Find SNAT address */
1632 for (i = 0; i < vec_len (addresses); i++)
1634 if (addresses[i].addr.as_u32 == addr.as_u32)
1641 return VNET_API_ERROR_NO_SUCH_ENTRY;
1646 pool_foreach (m, sm->static_mappings,
1648 if (m->external_addr.as_u32 == addr.as_u32)
1649 (void) snat_add_static_mapping (m->local_addr, m->external_addr,
1650 m->local_port, m->external_port,
1651 m->vrf_id, is_addr_only_static_mapping(m), ~0,
1652 m->proto, 0, m->twice_nat,
1653 is_out2in_only_static_mapping(m), m->tag, is_identity_static_mapping(m));
1659 /* Check if address is used in some static mapping */
1660 if (is_snat_address_used_in_static_mapping (sm, addr))
1662 nat_log_notice ("address used in static mapping");
1663 return VNET_API_ERROR_UNSPECIFIED;
1667 if (a->fib_index != ~0)
1668 fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_PLUGIN_LOW);
1670 /* Delete sessions using address */
1671 if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports)
1674 vec_foreach (tsm, sm->per_thread_data)
1676 pool_foreach (ses, tsm->sessions, ({
1677 if (ses->out2in.addr.as_u32 == addr.as_u32)
1679 nat_free_session_data (sm, ses, tsm - sm->per_thread_data, 0);
1680 vec_add1 (ses_to_be_removed, ses - tsm->sessions);
1684 vec_foreach (ses_index, ses_to_be_removed)
1686 ses = pool_elt_at_index (tsm->sessions, ses_index[0]);
1687 nat44_delete_session (sm, ses, tsm - sm->per_thread_data);
1690 vec_free (ses_to_be_removed);
1695 #define _(N, i, n, s) \
1696 clib_bitmap_free (a->busy_##n##_port_bitmap); \
1697 vec_free (a->busy_##n##_ports_per_thread);
1698 foreach_snat_protocol
1702 vec_del1 (sm->twice_nat_addresses, i);
1706 vec_del1 (sm->addresses, i);
1708 /* Delete external address from FIB */
1710 pool_foreach (interface, sm->interfaces,
1712 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1715 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1718 pool_foreach (interface, sm->output_feature_interfaces,
1720 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1723 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1732 snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
1734 snat_main_t *sm = &snat_main;
1735 snat_interface_t *i;
1736 const char *feature_name, *del_feature_name;
1738 snat_static_mapping_t *m;
1740 nat_outside_fib_t *outside_fib;
1741 u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1744 if (sm->out2in_dpo && !is_inside)
1745 return VNET_API_ERROR_UNSUPPORTED;
1748 pool_foreach (i, sm->output_feature_interfaces,
1750 if (i->sw_if_index == sw_if_index)
1751 return VNET_API_ERROR_VALUE_EXIST;
1755 if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking))
1756 feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast";
1759 if (sm->num_workers > 1 && !sm->deterministic)
1761 is_inside ? "nat44-in2out-worker-handoff" :
1762 "nat44-out2in-worker-handoff";
1763 else if (sm->deterministic)
1764 feature_name = is_inside ? "nat44-det-in2out" : "nat44-det-out2in";
1765 else if (sm->endpoint_dependent)
1766 feature_name = is_inside ? "nat44-ed-in2out" : "nat44-ed-out2in";
1768 feature_name = is_inside ? "nat44-in2out" : "nat44-out2in";
1771 if (sm->fq_in2out_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1772 sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index,
1775 if (sm->fq_out2in_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1776 sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index,
1782 vec_foreach (outside_fib, sm->outside_fibs)
1784 if (outside_fib->fib_index == fib_index)
1788 outside_fib->refcount--;
1789 if (!outside_fib->refcount)
1790 vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs);
1793 outside_fib->refcount++;
1800 vec_add2 (sm->outside_fibs, outside_fib, 1);
1801 outside_fib->refcount = 1;
1802 outside_fib->fib_index = fib_index;
1807 pool_foreach (i, sm->interfaces,
1809 if (i->sw_if_index == sw_if_index)
1813 if (nat_interface_is_inside(i) && nat_interface_is_outside(i))
1816 i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE;
1818 i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE;
1820 if (sm->num_workers > 1 && !sm->deterministic)
1822 del_feature_name = "nat44-handoff-classify";
1823 feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1824 "nat44-out2in-worker-handoff";
1826 else if (sm->deterministic)
1828 del_feature_name = "nat44-det-classify";
1829 feature_name = !is_inside ? "nat44-det-in2out" :
1832 else if (sm->endpoint_dependent)
1834 del_feature_name = "nat44-ed-classify";
1835 feature_name = !is_inside ? "nat44-ed-in2out" :
1840 del_feature_name = "nat44-classify";
1841 feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1844 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1845 sw_if_index, 0, 0, 0);
1846 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1847 sw_if_index, 1, 0, 0);
1850 if (sm->endpoint_dependent)
1851 vnet_feature_enable_disable ("ip4-local",
1852 "nat44-ed-hairpinning",
1853 sw_if_index, 1, 0, 0);
1854 else if (!sm->deterministic)
1855 vnet_feature_enable_disable ("ip4-local",
1856 "nat44-hairpinning",
1857 sw_if_index, 1, 0, 0);
1862 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1863 sw_if_index, 0, 0, 0);
1864 pool_put (sm->interfaces, i);
1867 if (sm->endpoint_dependent)
1868 vnet_feature_enable_disable ("ip4-local",
1869 "nat44-ed-hairpinning",
1870 sw_if_index, 0, 0, 0);
1871 else if (!sm->deterministic)
1872 vnet_feature_enable_disable ("ip4-local",
1873 "nat44-hairpinning",
1874 sw_if_index, 0, 0, 0);
1880 if ((nat_interface_is_inside(i) && is_inside) ||
1881 (nat_interface_is_outside(i) && !is_inside))
1884 if (sm->num_workers > 1 && !sm->deterministic)
1886 del_feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1887 "nat44-out2in-worker-handoff";
1888 feature_name = "nat44-handoff-classify";
1890 else if (sm->deterministic)
1892 del_feature_name = !is_inside ? "nat44-det-in2out" :
1894 feature_name = "nat44-det-classify";
1896 else if (sm->endpoint_dependent)
1898 del_feature_name = !is_inside ? "nat44-ed-in2out" :
1900 feature_name = "nat44-ed-classify";
1904 del_feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1905 feature_name = "nat44-classify";
1908 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1909 sw_if_index, 0, 0, 0);
1910 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1911 sw_if_index, 1, 0, 0);
1914 if (sm->endpoint_dependent)
1915 vnet_feature_enable_disable ("ip4-local", "nat44-ed-hairpinning",
1916 sw_if_index, 0, 0, 0);
1917 else if (!sm->deterministic)
1918 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1919 sw_if_index, 0, 0, 0);
1930 return VNET_API_ERROR_NO_SUCH_ENTRY;
1932 pool_get (sm->interfaces, i);
1933 i->sw_if_index = sw_if_index;
1935 vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0,
1938 if (is_inside && !sm->out2in_dpo)
1940 if (sm->endpoint_dependent)
1941 vnet_feature_enable_disable ("ip4-local", "nat44-ed-hairpinning",
1942 sw_if_index, 1, 0, 0);
1943 else if (!sm->deterministic)
1944 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1945 sw_if_index, 1, 0, 0);
1951 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
1955 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
1957 /* Add/delete external addresses to FIB */
1960 vec_foreach (ap, sm->addresses)
1961 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
1963 pool_foreach (m, sm->static_mappings,
1965 if (!(is_addr_only_static_mapping(m)) || (m->local_addr.as_u32 == m->external_addr.as_u32))
1968 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
1971 pool_foreach (dm, sm->det_maps,
1973 snat_add_del_addr_to_fib(&dm->out_addr, dm->out_plen, sw_if_index, !is_del);
1981 snat_interface_add_del_output_feature (u32 sw_if_index,
1982 u8 is_inside, int is_del)
1984 snat_main_t *sm = &snat_main;
1985 snat_interface_t *i;
1987 snat_static_mapping_t *m;
1988 nat_outside_fib_t *outside_fib;
1989 u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1993 if (sm->deterministic ||
1994 (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)))
1995 return VNET_API_ERROR_UNSUPPORTED;
1998 pool_foreach (i, sm->interfaces,
2000 if (i->sw_if_index == sw_if_index)
2001 return VNET_API_ERROR_VALUE_EXIST;
2008 vec_foreach (outside_fib, sm->outside_fibs)
2010 if (outside_fib->fib_index == fib_index)
2014 outside_fib->refcount--;
2015 if (!outside_fib->refcount)
2016 vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs);
2019 outside_fib->refcount++;
2026 vec_add2 (sm->outside_fibs, outside_fib, 1);
2027 outside_fib->refcount = 1;
2028 outside_fib->fib_index = fib_index;
2035 if (sm->endpoint_dependent)
2037 vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-hairpin-dst",
2038 sw_if_index, !is_del, 0, 0);
2039 vnet_feature_enable_disable ("ip4-output", "nat44-ed-hairpin-src",
2040 sw_if_index, !is_del, 0, 0);
2044 vnet_feature_enable_disable ("ip4-unicast", "nat44-hairpin-dst",
2045 sw_if_index, !is_del, 0, 0);
2046 vnet_feature_enable_disable ("ip4-output", "nat44-hairpin-src",
2047 sw_if_index, !is_del, 0, 0);
2052 if (sm->num_workers > 1)
2054 vnet_feature_enable_disable ("ip4-unicast",
2055 "nat44-out2in-worker-handoff",
2056 sw_if_index, !is_del, 0, 0);
2057 vnet_feature_enable_disable ("ip4-output",
2058 "nat44-in2out-output-worker-handoff",
2059 sw_if_index, !is_del, 0, 0);
2063 if (sm->endpoint_dependent)
2065 vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-out2in",
2066 sw_if_index, !is_del, 0, 0);
2067 vnet_feature_enable_disable ("ip4-output", "nat44-ed-in2out-output",
2068 sw_if_index, !is_del, 0, 0);
2072 vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in",
2073 sw_if_index, !is_del, 0, 0);
2074 vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output",
2075 sw_if_index, !is_del, 0, 0);
2080 if (sm->fq_in2out_output_index == ~0 && sm->num_workers > 1)
2081 sm->fq_in2out_output_index =
2082 vlib_frame_queue_main_init (sm->in2out_output_node_index, 0);
2084 if (sm->fq_out2in_index == ~0 && sm->num_workers > 1)
2085 sm->fq_out2in_index =
2086 vlib_frame_queue_main_init (sm->out2in_node_index, 0);
2089 pool_foreach (i, sm->output_feature_interfaces,
2091 if (i->sw_if_index == sw_if_index)
2094 pool_put (sm->output_feature_interfaces, i);
2096 return VNET_API_ERROR_VALUE_EXIST;
2104 return VNET_API_ERROR_NO_SUCH_ENTRY;
2106 pool_get (sm->output_feature_interfaces, i);
2107 i->sw_if_index = sw_if_index;
2110 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
2112 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
2114 /* Add/delete external addresses to FIB */
2120 vec_foreach (ap, sm->addresses)
2121 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
2123 pool_foreach (m, sm->static_mappings,
2125 if (!((is_addr_only_static_mapping(m))) || (m->local_addr.as_u32 == m->external_addr.as_u32))
2128 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
2136 snat_set_workers (uword * bitmap)
2138 snat_main_t *sm = &snat_main;
2141 if (sm->num_workers < 2)
2142 return VNET_API_ERROR_FEATURE_DISABLED;
2144 if (clib_bitmap_last_set (bitmap) >= sm->num_workers)
2145 return VNET_API_ERROR_INVALID_WORKER;
2147 vec_free (sm->workers);
2149 clib_bitmap_foreach (i, bitmap,
2151 vec_add1(sm->workers, i);
2152 sm->per_thread_data[sm->first_worker_index + i].snat_thread_index = j;
2157 sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers);
2158 sm->num_snat_thread = _vec_len (sm->workers);
2164 snat_update_outside_fib (u32 sw_if_index, u32 new_fib_index,
2167 snat_main_t *sm = &snat_main;
2168 nat_outside_fib_t *outside_fib;
2169 snat_interface_t *i;
2172 if (new_fib_index == old_fib_index)
2175 if (!vec_len (sm->outside_fibs))
2178 pool_foreach (i, sm->interfaces, (
2180 if (i->sw_if_index == sw_if_index)
2182 if (!(nat_interface_is_outside (i)))
2186 vec_foreach (outside_fib, sm->outside_fibs)
2188 if (outside_fib->fib_index == old_fib_index)
2190 outside_fib->refcount--;
2191 if (!outside_fib->refcount)
2192 vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs);
2197 vec_foreach (outside_fib, sm->outside_fibs)
2199 if (outside_fib->fib_index == new_fib_index)
2201 outside_fib->refcount++;
2209 vec_add2 (sm->outside_fibs, outside_fib, 1);
2210 outside_fib->refcount = 1;
2211 outside_fib->fib_index = new_fib_index;
2216 snat_ip4_table_bind (ip4_main_t * im,
2218 u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
2220 snat_update_outside_fib (sw_if_index, new_fib_index, old_fib_index);
2224 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
2227 ip4_address_t * address,
2229 u32 if_address_index, u32 is_delete);
2232 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
2235 ip4_address_t * address,
2237 u32 if_address_index, u32 is_delete);
2240 nat_alloc_addr_and_port_default (snat_address_t * addresses,
2243 snat_session_key_t * k,
2244 u16 port_per_thread, u32 snat_thread_index);
2246 static clib_error_t *
2247 snat_init (vlib_main_t * vm)
2249 snat_main_t *sm = &snat_main;
2250 clib_error_t *error = 0;
2251 ip4_main_t *im = &ip4_main;
2252 ip_lookup_main_t *lm = &im->lookup_main;
2254 vlib_thread_registration_t *tr;
2255 vlib_thread_main_t *tm = vlib_get_thread_main ();
2258 ip4_add_del_interface_address_callback_t cb4;
2262 sm->vnet_main = vnet_get_main ();
2264 sm->ip4_lookup_main = lm;
2265 sm->api_main = &api_main;
2266 sm->first_worker_index = 0;
2267 sm->num_workers = 0;
2268 sm->num_snat_thread = 1;
2270 sm->port_per_thread = 0xffff - 1024;
2271 sm->fq_in2out_index = ~0;
2272 sm->fq_in2out_output_index = ~0;
2273 sm->fq_out2in_index = ~0;
2274 sm->udp_timeout = SNAT_UDP_TIMEOUT;
2275 sm->tcp_established_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
2276 sm->tcp_transitory_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
2277 sm->icmp_timeout = SNAT_ICMP_TIMEOUT;
2278 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;
2279 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_DEFAULT;
2280 sm->forwarding_enabled = 0;
2281 sm->log_class = vlib_log_register_class ("nat", 0);
2282 sm->mss_clamping = 0;
2284 node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
2285 sm->error_node_index = node->index;
2287 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out");
2288 sm->in2out_node_index = node->index;
2289 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-output");
2290 sm->in2out_output_node_index = node->index;
2291 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-fast");
2292 sm->in2out_fast_node_index = node->index;
2293 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-slowpath");
2294 sm->in2out_slowpath_node_index = node->index;
2295 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-output-slowpath");
2296 sm->in2out_slowpath_output_node_index = node->index;
2297 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-reass");
2298 sm->in2out_reass_node_index = node->index;
2300 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out");
2301 sm->ed_in2out_node_index = node->index;
2302 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out-slowpath");
2303 sm->ed_in2out_slowpath_node_index = node->index;
2304 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out-reass");
2305 sm->ed_in2out_reass_node_index = node->index;
2307 node = vlib_get_node_by_name (vm, (u8 *) "nat44-out2in");
2308 sm->out2in_node_index = node->index;
2309 node = vlib_get_node_by_name (vm, (u8 *) "nat44-out2in-fast");
2310 sm->out2in_fast_node_index = node->index;
2311 node = vlib_get_node_by_name (vm, (u8 *) "nat44-out2in-reass");
2312 sm->out2in_reass_node_index = node->index;
2314 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in");
2315 sm->ed_out2in_node_index = node->index;
2316 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in-slowpath");
2317 sm->ed_out2in_slowpath_node_index = node->index;
2318 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in-reass");
2319 sm->ed_out2in_reass_node_index = node->index;
2321 node = vlib_get_node_by_name (vm, (u8 *) "nat44-det-in2out");
2322 sm->det_in2out_node_index = node->index;
2323 node = vlib_get_node_by_name (vm, (u8 *) "nat44-det-out2in");
2324 sm->det_out2in_node_index = node->index;
2326 node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpinning");
2327 sm->hairpinning_node_index = node->index;
2328 node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpin-dst");
2329 sm->hairpin_dst_node_index = node->index;
2330 node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpin-src");
2331 sm->hairpin_src_node_index = node->index;
2332 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-hairpinning");
2333 sm->ed_hairpinning_node_index = node->index;
2334 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-hairpin-dst");
2335 sm->ed_hairpin_dst_node_index = node->index;
2336 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-hairpin-src");
2337 sm->ed_hairpin_src_node_index = node->index;
2339 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
2342 tr = (vlib_thread_registration_t *) p[0];
2345 sm->num_workers = tr->count;
2346 sm->first_worker_index = tr->first_index;
2350 vec_validate (sm->per_thread_data, tm->n_vlib_mains - 1);
2352 /* Use all available workers by default */
2353 if (sm->num_workers > 1)
2355 for (i = 0; i < sm->num_workers; i++)
2356 bitmap = clib_bitmap_set (bitmap, i, 1);
2357 snat_set_workers (bitmap);
2358 clib_bitmap_free (bitmap);
2362 sm->per_thread_data[0].snat_thread_index = 0;
2365 error = snat_api_init (vm, sm);
2369 /* Set up the interface address add/del callback */
2370 cb4.function = snat_ip4_add_del_interface_address_cb;
2371 cb4.function_opaque = 0;
2373 vec_add1 (im->add_del_interface_address_callbacks, cb4);
2375 cb4.function = nat_ip4_add_del_addr_only_sm_cb;
2376 cb4.function_opaque = 0;
2378 vec_add1 (im->add_del_interface_address_callbacks, cb4);
2380 nat_dpo_module_init ();
2383 sm->total_users.name = "total-users";
2384 sm->total_users.stat_segment_name = "/nat44/total-users";
2385 vlib_validate_simple_counter (&sm->total_users, 0);
2386 vlib_zero_simple_counter (&sm->total_users, 0);
2387 sm->total_sessions.name = "total-sessions";
2388 sm->total_sessions.stat_segment_name = "/nat44/total-sessions";
2389 vlib_validate_simple_counter (&sm->total_sessions, 0);
2390 vlib_zero_simple_counter (&sm->total_sessions, 0);
2392 /* Init IPFIX logging */
2393 snat_ipfix_logging_init (vm);
2396 error = nat64_init (vm);
2404 ip4_table_bind_callback_t cbt4 = {
2405 .function = snat_ip4_table_bind,
2407 vec_add1 (ip4_main.table_bind_callbacks, cbt4);
2409 /* Init virtual fragmenentation reassembly */
2410 return nat_reass_init (vm);
2413 VLIB_INIT_FUNCTION (snat_init);
2416 snat_free_outside_address_and_port (snat_address_t * addresses,
2417 u32 thread_index, snat_session_key_t * k)
2421 u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
2423 for (address_index = 0; address_index < vec_len (addresses);
2426 if (addresses[address_index].addr.as_u32 == k->addr.as_u32)
2430 ASSERT (address_index < vec_len (addresses));
2432 a = addresses + address_index;
2434 switch (k->protocol)
2436 #define _(N, i, n, s) \
2437 case SNAT_PROTOCOL_##N: \
2438 ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
2439 port_host_byte_order) == 1); \
2440 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
2441 port_host_byte_order, 0); \
2442 a->busy_##n##_ports--; \
2443 a->busy_##n##_ports_per_thread[thread_index]--; \
2445 foreach_snat_protocol
2448 nat_log_info ("unknown protocol");
2454 nat_set_outside_address_and_port (snat_address_t * addresses,
2455 u32 thread_index, snat_session_key_t * k)
2457 snat_address_t *a = 0;
2459 u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
2461 for (address_index = 0; address_index < vec_len (addresses);
2464 if (addresses[address_index].addr.as_u32 != k->addr.as_u32)
2467 a = addresses + address_index;
2468 switch (k->protocol)
2470 #define _(N, j, n, s) \
2471 case SNAT_PROTOCOL_##N: \
2472 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, port_host_byte_order)) \
2473 return VNET_API_ERROR_INSTANCE_IN_USE; \
2474 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, port_host_byte_order, 1); \
2475 a->busy_##n##_ports_per_thread[thread_index]++; \
2476 a->busy_##n##_ports++; \
2478 foreach_snat_protocol
2481 nat_log_info ("unknown protocol");
2486 return VNET_API_ERROR_NO_SUCH_ENTRY;
2490 snat_static_mapping_match (snat_main_t * sm,
2491 snat_session_key_t match,
2492 snat_session_key_t * mapping,
2495 twice_nat_type_t * twice_nat,
2496 lb_nat_type_t * lb, ip4_address_t * ext_host_addr,
2497 u8 * is_identity_nat)
2499 clib_bihash_kv_8_8_t kv, value;
2500 snat_static_mapping_t *m;
2501 snat_session_key_t m_key;
2502 clib_bihash_8_8_t *mapping_hash = &sm->static_mapping_by_local;
2503 u32 rand, lo = 0, hi, mid, *tmp = 0, i;
2505 nat44_lb_addr_port_t *local;
2507 m_key.fib_index = match.fib_index;
2510 mapping_hash = &sm->static_mapping_by_external;
2511 m_key.fib_index = 0;
2514 m_key.addr = match.addr;
2515 m_key.port = clib_net_to_host_u16 (match.port);
2516 m_key.protocol = match.protocol;
2518 kv.key = m_key.as_u64;
2520 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2522 /* Try address only mapping */
2525 kv.key = m_key.as_u64;
2526 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2530 m = pool_elt_at_index (sm->static_mappings, value.value);
2534 if (is_lb_static_mapping (m))
2536 if (PREDICT_FALSE (lb != 0))
2537 *lb = m->affinity ? AFFINITY_LB_NAT : LB_NAT;
2540 if (nat_affinity_find_and_lock (ext_host_addr[0], match.addr,
2541 match.protocol, match.port,
2545 local = pool_elt_at_index (m->locals, backend_index);
2546 mapping->addr = local->addr;
2547 mapping->port = clib_host_to_net_u16 (local->port);
2548 mapping->fib_index = local->fib_index;
2553 pool_foreach_index (i, m->locals,
2558 hi = vec_len (tmp) - 1;
2559 local = pool_elt_at_index (m->locals, tmp[hi]);
2560 rand = 1 + (random_u32 (&sm->random_seed) % local->prefix);
2563 mid = ((hi - lo) >> 1) + lo;
2564 local = pool_elt_at_index (m->locals, tmp[mid]);
2565 (rand > local->prefix) ? (lo = mid + 1) : (hi = mid);
2567 local = pool_elt_at_index (m->locals, tmp[lo]);
2568 if (!(local->prefix >= rand))
2570 if (PREDICT_FALSE (sm->num_workers > 1))
2573 .src_address = local->addr,
2575 if (sm->worker_in2out_cb (&ip, m->fib_index) !=
2576 vlib_get_thread_index ())
2579 mapping->addr = local->addr;
2580 mapping->port = clib_host_to_net_u16 (local->port);
2581 mapping->fib_index = local->fib_index;
2584 if (nat_affinity_create_and_lock (ext_host_addr[0], match.addr,
2585 match.protocol, match.port,
2586 tmp[lo], m->affinity,
2587 m->affinity_per_service_list_head_index))
2588 nat_log_info ("create affinity record failed");
2594 if (PREDICT_FALSE (lb != 0))
2596 mapping->fib_index = m->fib_index;
2597 mapping->addr = m->local_addr;
2598 /* Address only mapping doesn't change port */
2599 mapping->port = is_addr_only_static_mapping (m) ? match.port
2600 : clib_host_to_net_u16 (m->local_port);
2602 mapping->protocol = m->proto;
2606 mapping->addr = m->external_addr;
2607 /* Address only mapping doesn't change port */
2608 mapping->port = is_addr_only_static_mapping (m) ? match.port
2609 : clib_host_to_net_u16 (m->external_port);
2610 mapping->fib_index = sm->outside_fib_index;
2614 if (PREDICT_FALSE (is_addr_only != 0))
2615 *is_addr_only = is_addr_only_static_mapping (m);
2617 if (PREDICT_FALSE (twice_nat != 0))
2618 *twice_nat = m->twice_nat;
2620 if (PREDICT_FALSE (is_identity_nat != 0))
2621 *is_identity_nat = is_identity_static_mapping (m);
2626 static_always_inline u16
2627 snat_random_port (u16 min, u16 max)
2629 snat_main_t *sm = &snat_main;
2630 return min + random_u32 (&sm->random_seed) /
2631 (random_u32_max () / (max - min + 1) + 1);
2635 snat_alloc_outside_address_and_port (snat_address_t * addresses,
2638 snat_session_key_t * k,
2639 u16 port_per_thread,
2640 u32 snat_thread_index)
2642 snat_main_t *sm = &snat_main;
2644 return sm->alloc_addr_and_port (addresses, fib_index, thread_index, k,
2645 port_per_thread, snat_thread_index);
2649 nat_alloc_addr_and_port_default (snat_address_t * addresses,
2652 snat_session_key_t * k,
2653 u16 port_per_thread, u32 snat_thread_index)
2656 snat_address_t *a, *ga = 0;
2659 for (i = 0; i < vec_len (addresses); i++)
2662 switch (k->protocol)
2664 #define _(N, j, n, s) \
2665 case SNAT_PROTOCOL_##N: \
2666 if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
2668 if (a->fib_index == fib_index) \
2672 portnum = (port_per_thread * \
2673 snat_thread_index) + \
2674 snat_random_port(1, port_per_thread) + 1024; \
2675 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2677 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2678 a->busy_##n##_ports_per_thread[thread_index]++; \
2679 a->busy_##n##_ports++; \
2680 k->addr = a->addr; \
2681 k->port = clib_host_to_net_u16(portnum); \
2685 else if (a->fib_index == ~0) \
2691 foreach_snat_protocol
2694 nat_log_info ("unknown protocol");
2703 switch (k->protocol)
2705 #define _(N, j, n, s) \
2706 case SNAT_PROTOCOL_##N: \
2709 portnum = (port_per_thread * \
2710 snat_thread_index) + \
2711 snat_random_port(1, port_per_thread) + 1024; \
2712 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2714 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2715 a->busy_##n##_ports_per_thread[thread_index]++; \
2716 a->busy_##n##_ports++; \
2717 k->addr = a->addr; \
2718 k->port = clib_host_to_net_u16(portnum); \
2722 foreach_snat_protocol
2725 nat_log_info ("unknown protocol");
2730 /* Totally out of translations to use... */
2731 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
2736 nat_alloc_addr_and_port_mape (snat_address_t * addresses,
2739 snat_session_key_t * k,
2740 u16 port_per_thread, u32 snat_thread_index)
2742 snat_main_t *sm = &snat_main;
2743 snat_address_t *a = addresses;
2744 u16 m, ports, portnum, A, j;
2745 m = 16 - (sm->psid_offset + sm->psid_length);
2746 ports = (1 << (16 - sm->psid_length)) - (1 << m);
2748 if (!vec_len (addresses))
2751 switch (k->protocol)
2753 #define _(N, i, n, s) \
2754 case SNAT_PROTOCOL_##N: \
2755 if (a->busy_##n##_ports < ports) \
2759 A = snat_random_port(1, pow2_mask(sm->psid_offset)); \
2760 j = snat_random_port(0, pow2_mask(m)); \
2761 portnum = A | (sm->psid << sm->psid_offset) | (j << (16 - m)); \
2762 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2764 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2765 a->busy_##n##_ports++; \
2766 k->addr = a->addr; \
2767 k->port = clib_host_to_net_u16 (portnum); \
2772 foreach_snat_protocol
2775 nat_log_info ("unknown protocol");
2780 /* Totally out of translations to use... */
2781 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
2786 nat_alloc_addr_and_port_range (snat_address_t * addresses,
2789 snat_session_key_t * k,
2790 u16 port_per_thread, u32 snat_thread_index)
2792 snat_main_t *sm = &snat_main;
2793 snat_address_t *a = addresses;
2796 ports = sm->end_port - sm->start_port + 1;
2798 if (!vec_len (addresses))
2801 switch (k->protocol)
2803 #define _(N, i, n, s) \
2804 case SNAT_PROTOCOL_##N: \
2805 if (a->busy_##n##_ports < ports) \
2809 portnum = snat_random_port(sm->start_port, sm->end_port); \
2810 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2812 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2813 a->busy_##n##_ports++; \
2814 k->addr = a->addr; \
2815 k->port = clib_host_to_net_u16 (portnum); \
2820 foreach_snat_protocol
2823 nat_log_info ("unknown protocol");
2828 /* Totally out of translations to use... */
2829 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
2834 nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add)
2836 dpo_id_t dpo_v4 = DPO_INVALID;
2837 fib_prefix_t pfx = {
2838 .fp_proto = FIB_PROTOCOL_IP4,
2840 .fp_addr.ip4.as_u32 = addr.as_u32,
2845 nat_dpo_create (DPO_PROTO_IP4, 0, &dpo_v4);
2846 fib_table_entry_special_dpo_add (0, &pfx, FIB_SOURCE_PLUGIN_HI,
2847 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4);
2848 dpo_reset (&dpo_v4);
2852 fib_table_entry_special_remove (0, &pfx, FIB_SOURCE_PLUGIN_HI);
2857 format_session_kvp (u8 * s, va_list * args)
2859 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2860 snat_session_key_t k;
2864 s = format (s, "%U session-index %llu", format_snat_key, &k, v->value);
2870 format_static_mapping_kvp (u8 * s, va_list * args)
2872 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2873 snat_session_key_t k;
2877 s = format (s, "%U static-mapping-index %llu",
2878 format_static_mapping_key, &k, v->value);
2884 format_user_kvp (u8 * s, va_list * args)
2886 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2891 s = format (s, "%U fib %d user-index %llu", format_ip4_address, &k.addr,
2892 k.fib_index, v->value);
2898 format_ed_session_kvp (u8 * s, va_list * args)
2900 clib_bihash_kv_16_8_t *v = va_arg (*args, clib_bihash_kv_16_8_t *);
2903 k.as_u64[0] = v->key[0];
2904 k.as_u64[1] = v->key[1];
2907 format (s, "local %U:%d remote %U:%d proto %U fib %d session-index %llu",
2908 format_ip4_address, &k.l_addr, clib_net_to_host_u16 (k.l_port),
2909 format_ip4_address, &k.r_addr, clib_net_to_host_u16 (k.r_port),
2910 format_ip_protocol, k.proto, k.fib_index, v->value);
2916 snat_get_worker_in2out_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2918 snat_main_t *sm = &snat_main;
2919 u32 next_worker_index = 0;
2922 next_worker_index = sm->first_worker_index;
2923 hash = ip0->src_address.as_u32 + (ip0->src_address.as_u32 >> 8) +
2924 (ip0->src_address.as_u32 >> 16) + (ip0->src_address.as_u32 >> 24);
2926 if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
2927 next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
2929 next_worker_index += sm->workers[hash % _vec_len (sm->workers)];
2931 return next_worker_index;
2935 snat_get_worker_out2in_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2937 snat_main_t *sm = &snat_main;
2940 snat_session_key_t m_key;
2941 clib_bihash_kv_8_8_t kv, value;
2942 snat_static_mapping_t *m;
2944 u32 next_worker_index = 0;
2946 /* first try static mappings without port */
2947 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2949 m_key.addr = ip0->dst_address;
2952 m_key.fib_index = rx_fib_index0;
2953 kv.key = m_key.as_u64;
2954 if (!clib_bihash_search_8_8
2955 (&sm->static_mapping_by_external, &kv, &value))
2957 m = pool_elt_at_index (sm->static_mappings, value.value);
2958 return m->workers[0];
2962 proto = ip_proto_to_snat_proto (ip0->protocol);
2963 udp = ip4_next_header (ip0);
2964 port = udp->dst_port;
2966 if (PREDICT_FALSE (ip4_is_fragment (ip0)))
2968 if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
2969 return vlib_get_thread_index ();
2971 nat_reass_ip4_t *reass;
2972 reass = nat_ip4_reass_find (ip0->src_address, ip0->dst_address,
2973 ip0->fragment_id, ip0->protocol);
2975 if (reass && (reass->thread_index != (u32) ~ 0))
2976 return reass->thread_index;
2978 if (ip4_is_first_fragment (ip0))
2981 nat_ip4_reass_create (ip0->src_address, ip0->dst_address,
2982 ip0->fragment_id, ip0->protocol);
2986 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2988 m_key.addr = ip0->dst_address;
2989 m_key.port = clib_net_to_host_u16 (port);
2990 m_key.protocol = proto;
2991 m_key.fib_index = rx_fib_index0;
2992 kv.key = m_key.as_u64;
2993 if (!clib_bihash_search_8_8
2994 (&sm->static_mapping_by_external, &kv, &value))
2996 m = pool_elt_at_index (sm->static_mappings, value.value);
2997 reass->thread_index = m->workers[0];
2998 return reass->thread_index;
3001 reass->thread_index = sm->first_worker_index;
3002 reass->thread_index +=
3003 sm->workers[(clib_net_to_host_u16 (port) - 1024) /
3004 sm->port_per_thread];
3005 return reass->thread_index;
3008 return vlib_get_thread_index ();
3012 /* unknown protocol */
3013 if (PREDICT_FALSE (proto == ~0))
3015 /* use current thread */
3016 return vlib_get_thread_index ();
3019 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_ICMP))
3021 icmp46_header_t *icmp = (icmp46_header_t *) udp;
3022 icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
3023 if (!icmp_is_error_message (icmp))
3024 port = echo->identifier;
3027 ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
3028 proto = ip_proto_to_snat_proto (inner_ip->protocol);
3029 void *l4_header = ip4_next_header (inner_ip);
3032 case SNAT_PROTOCOL_ICMP:
3033 icmp = (icmp46_header_t *) l4_header;
3034 echo = (icmp_echo_header_t *) (icmp + 1);
3035 port = echo->identifier;
3037 case SNAT_PROTOCOL_UDP:
3038 case SNAT_PROTOCOL_TCP:
3039 port = ((tcp_udp_header_t *) l4_header)->src_port;
3042 return vlib_get_thread_index ();
3047 /* try static mappings with port */
3048 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3050 m_key.addr = ip0->dst_address;
3051 m_key.port = clib_net_to_host_u16 (port);
3052 m_key.protocol = proto;
3053 m_key.fib_index = rx_fib_index0;
3054 kv.key = m_key.as_u64;
3055 if (!clib_bihash_search_8_8
3056 (&sm->static_mapping_by_external, &kv, &value))
3058 m = pool_elt_at_index (sm->static_mappings, value.value);
3059 return m->workers[0];
3063 /* worker by outside port */
3064 next_worker_index = sm->first_worker_index;
3065 next_worker_index +=
3066 sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread];
3067 return next_worker_index;
3071 nat44_ed_get_worker_out2in_cb (ip4_header_t * ip, u32 rx_fib_index)
3073 snat_main_t *sm = &snat_main;
3074 clib_bihash_kv_8_8_t kv, value;
3075 u32 proto, next_worker_index = 0;
3078 snat_static_mapping_t *m;
3081 /* first try static mappings without port */
3082 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3084 make_sm_kv (&kv, &ip->dst_address, 0, rx_fib_index, 0);
3085 if (!clib_bihash_search_8_8
3086 (&sm->static_mapping_by_external, &kv, &value))
3088 m = pool_elt_at_index (sm->static_mappings, value.value);
3089 return m->workers[0];
3093 proto = ip_proto_to_snat_proto (ip->protocol);
3095 /* unknown protocol */
3096 if (PREDICT_FALSE (proto == ~0))
3098 /* use current thread */
3099 return vlib_get_thread_index ();
3102 udp = ip4_next_header (ip);
3103 port = udp->dst_port;
3105 if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP))
3107 icmp46_header_t *icmp = (icmp46_header_t *) udp;
3108 icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
3109 if (!icmp_is_error_message (icmp))
3110 port = echo->identifier;
3113 ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
3114 proto = ip_proto_to_snat_proto (inner_ip->protocol);
3115 void *l4_header = ip4_next_header (inner_ip);
3118 case SNAT_PROTOCOL_ICMP:
3119 icmp = (icmp46_header_t *) l4_header;
3120 echo = (icmp_echo_header_t *) (icmp + 1);
3121 port = echo->identifier;
3123 case SNAT_PROTOCOL_UDP:
3124 case SNAT_PROTOCOL_TCP:
3125 port = ((tcp_udp_header_t *) l4_header)->src_port;
3128 return vlib_get_thread_index ();
3133 /* try static mappings with port */
3134 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3136 make_sm_kv (&kv, &ip->dst_address, proto, rx_fib_index,
3137 clib_net_to_host_u16 (port));
3138 if (!clib_bihash_search_8_8
3139 (&sm->static_mapping_by_external, &kv, &value))
3141 m = pool_elt_at_index (sm->static_mappings, value.value);
3142 if (!is_lb_static_mapping (m))
3143 return m->workers[0];
3145 hash = ip->src_address.as_u32 + (ip->src_address.as_u32 >> 8) +
3146 (ip->src_address.as_u32 >> 16) + (ip->src_address.as_u32 >> 24);
3148 if (PREDICT_TRUE (is_pow2 (_vec_len (m->workers))))
3149 return m->workers[hash & (_vec_len (m->workers) - 1)];
3151 return m->workers[hash % _vec_len (m->workers)];
3155 /* worker by outside port */
3156 next_worker_index = sm->first_worker_index;
3157 next_worker_index +=
3158 sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread];
3160 return next_worker_index;
3164 nat_ha_sadd_cb (ip4_address_t * in_addr, u16 in_port,
3165 ip4_address_t * out_addr, u16 out_port,
3166 ip4_address_t * eh_addr, u16 eh_port,
3167 ip4_address_t * ehn_addr, u16 ehn_port, u8 proto,
3168 u32 fib_index, u16 flags, u32 thread_index)
3170 snat_main_t *sm = &snat_main;
3171 snat_session_key_t key;
3174 clib_bihash_kv_8_8_t kv;
3175 f64 now = vlib_time_now (sm->vlib_main);
3176 nat_outside_fib_t *outside_fib;
3177 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
3178 snat_main_per_thread_data_t *tsm;
3179 fib_prefix_t pfx = {
3180 .fp_proto = FIB_PROTOCOL_IP4,
3183 .ip4.as_u32 = eh_addr->as_u32,
3187 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3189 key.addr.as_u32 = out_addr->as_u32;
3190 key.port = out_port;
3191 key.protocol = proto;
3193 if (!(flags & SNAT_SESSION_FLAG_STATIC_MAPPING))
3195 if (nat_set_outside_address_and_port
3196 (sm->addresses, thread_index, &key))
3200 u = nat_user_get_or_create (sm, in_addr, fib_index, thread_index);
3204 s = nat_session_alloc_or_recycle (sm, u, thread_index, now);
3208 s->last_heard = now;
3210 s->ext_host_addr.as_u32 = eh_addr->as_u32;
3211 s->ext_host_port = eh_port;
3212 user_session_increment (sm, u, snat_is_session_static (s));
3213 switch (vec_len (sm->outside_fibs))
3216 key.fib_index = sm->outside_fib_index;
3219 key.fib_index = sm->outside_fibs[0].fib_index;
3223 vec_foreach (outside_fib, sm->outside_fibs)
3225 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
3226 if (FIB_NODE_INDEX_INVALID != fei)
3228 if (fib_entry_get_resolving_interface (fei) != ~0)
3230 key.fib_index = outside_fib->fib_index;
3239 kv.key = key.as_u64;
3240 kv.value = s - tsm->sessions;
3241 if (clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 1))
3242 nat_log_warn ("out2in key add failed");
3244 key.addr.as_u32 = in_addr->as_u32;
3246 key.fib_index = fib_index;
3248 kv.key = key.as_u64;
3249 if (clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 1))
3250 nat_log_warn ("in2out key add failed");
3254 nat_ha_sdel_cb (ip4_address_t * out_addr, u16 out_port,
3255 ip4_address_t * eh_addr, u16 eh_port, u8 proto, u32 fib_index,
3258 snat_main_t *sm = &snat_main;
3259 snat_session_key_t key;
3260 clib_bihash_kv_8_8_t kv, value;
3263 snat_main_per_thread_data_t *tsm;
3265 if (sm->num_workers > 1)
3267 sm->first_worker_index +
3268 (sm->workers[(clib_net_to_host_u16 (out_port) -
3269 1024) / sm->port_per_thread]);
3271 thread_index = sm->num_workers;
3272 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3274 key.addr.as_u32 = out_addr->as_u32;
3275 key.port = out_port;
3276 key.protocol = proto;
3277 key.fib_index = fib_index;
3278 kv.key = key.as_u64;
3279 if (clib_bihash_search_8_8 (&tsm->out2in, &kv, &value))
3282 s = pool_elt_at_index (tsm->sessions, value.value);
3283 nat_free_session_data (sm, s, thread_index, 1);
3284 nat44_delete_session (sm, s, thread_index);
3288 nat_ha_sref_cb (ip4_address_t * out_addr, u16 out_port,
3289 ip4_address_t * eh_addr, u16 eh_port, u8 proto, u32 fib_index,
3290 u32 total_pkts, u64 total_bytes, u32 thread_index)
3292 snat_main_t *sm = &snat_main;
3293 snat_session_key_t key;
3294 clib_bihash_kv_8_8_t kv, value;
3296 snat_main_per_thread_data_t *tsm;
3298 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3300 key.addr.as_u32 = out_addr->as_u32;
3301 key.port = out_port;
3302 key.protocol = proto;
3303 key.fib_index = fib_index;
3304 kv.key = key.as_u64;
3305 if (clib_bihash_search_8_8 (&tsm->out2in, &kv, &value))
3308 s = pool_elt_at_index (tsm->sessions, value.value);
3309 s->total_pkts = total_pkts;
3310 s->total_bytes = total_bytes;
3314 nat_ha_sadd_ed_cb (ip4_address_t * in_addr, u16 in_port,
3315 ip4_address_t * out_addr, u16 out_port,
3316 ip4_address_t * eh_addr, u16 eh_port,
3317 ip4_address_t * ehn_addr, u16 ehn_port, u8 proto,
3318 u32 fib_index, u16 flags, u32 thread_index)
3320 snat_main_t *sm = &snat_main;
3321 snat_session_key_t key;
3324 clib_bihash_kv_16_8_t kv;
3325 f64 now = vlib_time_now (sm->vlib_main);
3326 nat_outside_fib_t *outside_fib;
3327 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
3328 snat_main_per_thread_data_t *tsm;
3329 fib_prefix_t pfx = {
3330 .fp_proto = FIB_PROTOCOL_IP4,
3333 .ip4.as_u32 = eh_addr->as_u32,
3337 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3339 key.addr.as_u32 = out_addr->as_u32;
3340 key.port = out_port;
3341 key.protocol = proto;
3343 if (!(flags & SNAT_SESSION_FLAG_STATIC_MAPPING))
3345 if (nat_set_outside_address_and_port
3346 (sm->addresses, thread_index, &key))
3350 key.addr.as_u32 = ehn_addr->as_u32;
3351 key.port = ehn_port;
3352 if (flags & SNAT_SESSION_FLAG_TWICE_NAT)
3354 if (nat_set_outside_address_and_port
3355 (sm->twice_nat_addresses, thread_index, &key))
3359 u = nat_user_get_or_create (sm, in_addr, fib_index, thread_index);
3363 s = nat_ed_session_alloc (sm, u, thread_index, now);
3367 s->last_heard = now;
3369 s->ext_host_nat_addr.as_u32 = s->ext_host_addr.as_u32 = eh_addr->as_u32;
3370 s->ext_host_nat_port = s->ext_host_port = eh_port;
3371 if (is_twice_nat_session (s))
3373 s->ext_host_nat_addr.as_u32 = ehn_addr->as_u32;
3374 s->ext_host_nat_port = ehn_port;
3376 user_session_increment (sm, u, snat_is_session_static (s));
3377 switch (vec_len (sm->outside_fibs))
3380 key.fib_index = sm->outside_fib_index;
3383 key.fib_index = sm->outside_fibs[0].fib_index;
3387 vec_foreach (outside_fib, sm->outside_fibs)
3389 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
3390 if (FIB_NODE_INDEX_INVALID != fei)
3392 if (fib_entry_get_resolving_interface (fei) != ~0)
3394 key.fib_index = outside_fib->fib_index;
3402 key.addr.as_u32 = out_addr->as_u32;
3403 key.port = out_port;
3405 kv.value = s - tsm->sessions;
3407 key.addr.as_u32 = in_addr->as_u32;
3409 key.fib_index = fib_index;
3412 make_ed_kv (&kv, in_addr, &s->ext_host_nat_addr,
3413 snat_proto_to_ip_proto (proto), fib_index, in_port,
3414 s->ext_host_nat_port);
3415 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1))
3416 nat_log_warn ("in2out key add failed");
3418 make_ed_kv (&kv, out_addr, eh_addr, snat_proto_to_ip_proto (proto),
3419 s->out2in.fib_index, out_port, eh_port);
3420 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 1))
3421 nat_log_warn ("out2in key add failed");
3425 nat_ha_sdel_ed_cb (ip4_address_t * out_addr, u16 out_port,
3426 ip4_address_t * eh_addr, u16 eh_port, u8 proto,
3427 u32 fib_index, u32 ti)
3429 snat_main_t *sm = &snat_main;
3430 nat_ed_ses_key_t key;
3431 clib_bihash_kv_16_8_t kv, value;
3434 snat_main_per_thread_data_t *tsm;
3436 if (sm->num_workers > 1)
3438 sm->first_worker_index +
3439 (sm->workers[(clib_net_to_host_u16 (out_port) -
3440 1024) / sm->port_per_thread]);
3442 thread_index = sm->num_workers;
3443 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3445 key.l_addr.as_u32 = out_addr->as_u32;
3446 key.l_port = out_port;
3447 key.r_addr.as_u32 = eh_addr->as_u32;
3448 key.r_port = eh_port;
3450 key.fib_index = fib_index;
3451 kv.key[0] = key.as_u64[0];
3452 kv.key[1] = key.as_u64[1];
3453 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
3456 s = pool_elt_at_index (tsm->sessions, value.value);
3457 nat_free_session_data (sm, s, thread_index, 1);
3458 nat44_delete_session (sm, s, thread_index);
3462 nat_ha_sref_ed_cb (ip4_address_t * out_addr, u16 out_port,
3463 ip4_address_t * eh_addr, u16 eh_port, u8 proto,
3464 u32 fib_index, u32 total_pkts, u64 total_bytes,
3467 snat_main_t *sm = &snat_main;
3468 nat_ed_ses_key_t key;
3469 clib_bihash_kv_16_8_t kv, value;
3471 snat_main_per_thread_data_t *tsm;
3473 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3475 key.l_addr.as_u32 = out_addr->as_u32;
3476 key.l_port = out_port;
3477 key.r_addr.as_u32 = eh_addr->as_u32;
3478 key.r_port = eh_port;
3480 key.fib_index = fib_index;
3481 kv.key[0] = key.as_u64[0];
3482 kv.key[1] = key.as_u64[1];
3483 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
3486 s = pool_elt_at_index (tsm->sessions, value.value);
3487 s->total_pkts = total_pkts;
3488 s->total_bytes = total_bytes;
3491 static clib_error_t *
3492 snat_config (vlib_main_t * vm, unformat_input_t * input)
3494 snat_main_t *sm = &snat_main;
3495 nat66_main_t *nm = &nat66_main;
3496 u32 translation_buckets = 1024;
3497 u32 translation_memory_size = 128 << 20;
3498 u32 user_buckets = 128;
3499 u32 user_memory_size = 64 << 20;
3500 u32 max_translations_per_user = 100;
3501 u32 outside_vrf_id = 0;
3502 u32 outside_ip6_vrf_id = 0;
3503 u32 inside_vrf_id = 0;
3504 u32 static_mapping_buckets = 1024;
3505 u32 static_mapping_memory_size = 64 << 20;
3506 u32 nat64_bib_buckets = 1024;
3507 u32 nat64_bib_memory_size = 128 << 20;
3508 u32 nat64_st_buckets = 2048;
3509 u32 nat64_st_memory_size = 256 << 20;
3510 u8 static_mapping_only = 0;
3511 u8 static_mapping_connection_tracking = 0;
3512 snat_main_per_thread_data_t *tsm;
3513 dslite_main_t *dm = &dslite_main;
3515 sm->deterministic = 0;
3517 sm->endpoint_dependent = 0;
3519 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3522 (input, "translation hash buckets %d", &translation_buckets))
3524 else if (unformat (input, "translation hash memory %d",
3525 &translation_memory_size));
3526 else if (unformat (input, "user hash buckets %d", &user_buckets))
3528 else if (unformat (input, "user hash memory %d", &user_memory_size))
3530 else if (unformat (input, "max translations per user %d",
3531 &max_translations_per_user))
3533 else if (unformat (input, "outside VRF id %d", &outside_vrf_id))
3535 else if (unformat (input, "outside ip6 VRF id %d", &outside_ip6_vrf_id))
3537 else if (unformat (input, "inside VRF id %d", &inside_vrf_id))
3539 else if (unformat (input, "static mapping only"))
3541 static_mapping_only = 1;
3542 if (unformat (input, "connection tracking"))
3543 static_mapping_connection_tracking = 1;
3545 else if (unformat (input, "deterministic"))
3546 sm->deterministic = 1;
3547 else if (unformat (input, "nat64 bib hash buckets %d",
3548 &nat64_bib_buckets))
3550 else if (unformat (input, "nat64 bib hash memory %d",
3551 &nat64_bib_memory_size))
3554 if (unformat (input, "nat64 st hash buckets %d", &nat64_st_buckets))
3556 else if (unformat (input, "nat64 st hash memory %d",
3557 &nat64_st_memory_size))
3559 else if (unformat (input, "out2in dpo"))
3561 else if (unformat (input, "dslite ce"))
3562 dslite_set_ce (dm, 1);
3563 else if (unformat (input, "endpoint-dependent"))
3564 sm->endpoint_dependent = 1;
3566 return clib_error_return (0, "unknown input '%U'",
3567 format_unformat_error, input);
3570 if (sm->deterministic && sm->endpoint_dependent)
3571 return clib_error_return (0,
3572 "deterministic and endpoint-dependent modes are mutually exclusive");
3574 if (static_mapping_only && (sm->deterministic || sm->endpoint_dependent))
3575 return clib_error_return (0,
3576 "static mapping only mode available only for simple nat");
3578 if (sm->out2in_dpo && (sm->deterministic || sm->endpoint_dependent))
3579 return clib_error_return (0,
3580 "out2in dpo mode available only for simple nat");
3582 /* for show commands, etc. */
3583 sm->translation_buckets = translation_buckets;
3584 sm->translation_memory_size = translation_memory_size;
3585 /* do not exceed load factor 10 */
3586 sm->max_translations = 10 * translation_buckets;
3587 sm->user_buckets = user_buckets;
3588 sm->user_memory_size = user_memory_size;
3589 sm->max_translations_per_user = max_translations_per_user;
3590 sm->outside_vrf_id = outside_vrf_id;
3591 sm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
3593 FIB_SOURCE_PLUGIN_HI);
3594 nm->outside_vrf_id = outside_ip6_vrf_id;
3595 nm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
3597 FIB_SOURCE_PLUGIN_HI);
3598 sm->inside_vrf_id = inside_vrf_id;
3599 sm->inside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
3601 FIB_SOURCE_PLUGIN_HI);
3602 sm->static_mapping_only = static_mapping_only;
3603 sm->static_mapping_connection_tracking = static_mapping_connection_tracking;
3605 nat64_set_hash (nat64_bib_buckets, nat64_bib_memory_size, nat64_st_buckets,
3606 nat64_st_memory_size);
3608 if (sm->deterministic)
3610 sm->in2out_node_index = snat_det_in2out_node.index;
3611 sm->in2out_output_node_index = ~0;
3612 sm->out2in_node_index = snat_det_out2in_node.index;
3613 sm->icmp_match_in2out_cb = icmp_match_in2out_det;
3614 sm->icmp_match_out2in_cb = icmp_match_out2in_det;
3618 if (sm->endpoint_dependent)
3620 sm->worker_in2out_cb = snat_get_worker_in2out_cb;
3621 sm->worker_out2in_cb = nat44_ed_get_worker_out2in_cb;
3622 sm->in2out_node_index = nat44_ed_in2out_node.index;
3623 sm->in2out_output_node_index = nat44_ed_in2out_output_node.index;
3624 sm->out2in_node_index = nat44_ed_out2in_node.index;
3625 sm->icmp_match_in2out_cb = icmp_match_in2out_ed;
3626 sm->icmp_match_out2in_cb = icmp_match_out2in_ed;
3627 nat_affinity_init (vm);
3628 nat_ha_init (vm, nat_ha_sadd_ed_cb, nat_ha_sdel_ed_cb,
3633 sm->worker_in2out_cb = snat_get_worker_in2out_cb;
3634 sm->worker_out2in_cb = snat_get_worker_out2in_cb;
3635 sm->in2out_node_index = snat_in2out_node.index;
3636 sm->in2out_output_node_index = snat_in2out_output_node.index;
3637 sm->out2in_node_index = snat_out2in_node.index;
3638 sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
3639 sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
3640 nat_ha_init (vm, nat_ha_sadd_cb, nat_ha_sdel_cb, nat_ha_sref_cb);
3642 if (!static_mapping_only ||
3643 (static_mapping_only && static_mapping_connection_tracking))
3646 vec_foreach (tsm, sm->per_thread_data)
3648 if (sm->endpoint_dependent)
3650 clib_bihash_init_16_8 (&tsm->in2out_ed, "in2out-ed",
3651 translation_buckets,
3652 translation_memory_size);
3653 clib_bihash_set_kvp_format_fn_16_8 (&tsm->in2out_ed,
3654 format_ed_session_kvp);
3656 clib_bihash_init_16_8 (&tsm->out2in_ed, "out2in-ed",
3657 translation_buckets,
3658 translation_memory_size);
3659 clib_bihash_set_kvp_format_fn_16_8 (&tsm->out2in_ed,
3660 format_ed_session_kvp);
3664 clib_bihash_init_8_8 (&tsm->in2out, "in2out",
3665 translation_buckets,
3666 translation_memory_size);
3667 clib_bihash_set_kvp_format_fn_8_8 (&tsm->in2out,
3668 format_session_kvp);
3670 clib_bihash_init_8_8 (&tsm->out2in, "out2in",
3671 translation_buckets,
3672 translation_memory_size);
3673 clib_bihash_set_kvp_format_fn_8_8 (&tsm->out2in,
3674 format_session_kvp);
3677 clib_bihash_init_8_8 (&tsm->user_hash, "users", user_buckets,
3679 clib_bihash_set_kvp_format_fn_8_8 (&tsm->user_hash,
3687 sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
3688 sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
3690 clib_bihash_init_8_8 (&sm->static_mapping_by_local,
3691 "static_mapping_by_local", static_mapping_buckets,
3692 static_mapping_memory_size);
3693 clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_local,
3694 format_static_mapping_kvp);
3696 clib_bihash_init_8_8 (&sm->static_mapping_by_external,
3697 "static_mapping_by_external",
3698 static_mapping_buckets,
3699 static_mapping_memory_size);
3700 clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_external,
3701 format_static_mapping_kvp);
3707 VLIB_CONFIG_FUNCTION (snat_config, "nat");
3710 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
3713 ip4_address_t * address,
3715 u32 if_address_index, u32 is_delete)
3717 snat_main_t *sm = &snat_main;
3718 snat_static_map_resolve_t *rp;
3719 snat_static_mapping_t *m;
3720 snat_session_key_t m_key;
3721 clib_bihash_kv_8_8_t kv, value;
3723 ip4_address_t l_addr;
3725 for (i = 0; i < vec_len (sm->to_resolve); i++)
3727 rp = sm->to_resolve + i;
3728 if (rp->addr_only == 0)
3730 if (rp->sw_if_index == sw_if_index)
3737 m_key.addr.as_u32 = address->as_u32;
3738 m_key.port = rp->addr_only ? 0 : rp->e_port;
3739 m_key.protocol = rp->addr_only ? 0 : rp->proto;
3740 m_key.fib_index = sm->outside_fib_index;
3741 kv.key = m_key.as_u64;
3742 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
3745 m = pool_elt_at_index (sm->static_mappings, value.value);
3749 /* Don't trip over lease renewal, static config */
3759 /* Indetity mapping? */
3760 if (rp->l_addr.as_u32 == 0)
3761 l_addr.as_u32 = address[0].as_u32;
3763 l_addr.as_u32 = rp->l_addr.as_u32;
3764 /* Add the static mapping */
3765 rv = snat_add_static_mapping (l_addr,
3770 rp->addr_only, ~0 /* sw_if_index */ ,
3771 rp->proto, !is_delete, rp->twice_nat,
3772 rp->out2in_only, rp->tag, rp->identity_nat);
3774 nat_log_notice ("snat_add_static_mapping returned %d", rv);
3778 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
3781 ip4_address_t * address,
3783 u32 if_address_index, u32 is_delete)
3785 snat_main_t *sm = &snat_main;
3786 snat_static_map_resolve_t *rp;
3787 ip4_address_t l_addr;
3791 snat_address_t *addresses = sm->addresses;
3793 for (i = 0; i < vec_len (sm->auto_add_sw_if_indices); i++)
3795 if (sw_if_index == sm->auto_add_sw_if_indices[i])
3799 for (i = 0; i < vec_len (sm->auto_add_sw_if_indices_twice_nat); i++)
3802 addresses = sm->twice_nat_addresses;
3803 if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i])
3812 /* Don't trip over lease renewal, static config */
3813 for (j = 0; j < vec_len (addresses); j++)
3814 if (addresses[j].addr.as_u32 == address->as_u32)
3817 (void) snat_add_address (sm, address, ~0, twice_nat);
3818 /* Scan static map resolution vector */
3819 for (j = 0; j < vec_len (sm->to_resolve); j++)
3821 rp = sm->to_resolve + j;
3824 /* On this interface? */
3825 if (rp->sw_if_index == sw_if_index)
3827 /* Indetity mapping? */
3828 if (rp->l_addr.as_u32 == 0)
3829 l_addr.as_u32 = address[0].as_u32;
3831 l_addr.as_u32 = rp->l_addr.as_u32;
3832 /* Add the static mapping */
3833 rv = snat_add_static_mapping (l_addr,
3839 ~0 /* sw_if_index */ ,
3841 rp->is_add, rp->twice_nat,
3842 rp->out2in_only, rp->tag,
3845 nat_log_notice ("snat_add_static_mapping returned %d", rv);
3852 (void) snat_del_address (sm, address[0], 1, twice_nat);
3859 snat_add_interface_address (snat_main_t * sm, u32 sw_if_index, int is_del,
3862 ip4_main_t *ip4_main = sm->ip4_main;
3863 ip4_address_t *first_int_addr;
3864 snat_static_map_resolve_t *rp;
3865 u32 *indices_to_delete = 0;
3867 u32 *auto_add_sw_if_indices =
3869 auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices;
3871 first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0 /* just want the address */
3874 for (i = 0; i < vec_len (auto_add_sw_if_indices); i++)
3876 if (auto_add_sw_if_indices[i] == sw_if_index)
3880 /* if have address remove it */
3882 (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat);
3885 for (j = 0; j < vec_len (sm->to_resolve); j++)
3887 rp = sm->to_resolve + j;
3888 if (rp->sw_if_index == sw_if_index)
3889 vec_add1 (indices_to_delete, j);
3891 if (vec_len (indices_to_delete))
3893 for (j = vec_len (indices_to_delete) - 1; j >= 0; j--)
3894 vec_del1 (sm->to_resolve, j);
3895 vec_free (indices_to_delete);
3899 vec_del1 (sm->auto_add_sw_if_indices_twice_nat, i);
3901 vec_del1 (sm->auto_add_sw_if_indices, i);
3904 return VNET_API_ERROR_VALUE_EXIST;
3911 return VNET_API_ERROR_NO_SUCH_ENTRY;
3913 /* add to the auto-address list */
3915 vec_add1 (sm->auto_add_sw_if_indices_twice_nat, sw_if_index);
3917 vec_add1 (sm->auto_add_sw_if_indices, sw_if_index);
3919 /* If the address is already bound - or static - add it now */
3921 (void) snat_add_address (sm, first_int_addr, ~0, twice_nat);
3927 nat44_del_session (snat_main_t * sm, ip4_address_t * addr, u16 port,
3928 snat_protocol_t proto, u32 vrf_id, int is_in)
3930 snat_main_per_thread_data_t *tsm;
3931 clib_bihash_kv_8_8_t kv, value;
3933 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3934 snat_session_key_t key;
3936 clib_bihash_8_8_t *t;
3938 if (sm->endpoint_dependent)
3939 return VNET_API_ERROR_UNSUPPORTED;
3941 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3942 if (sm->num_workers > 1)
3944 vec_elt_at_index (sm->per_thread_data,
3945 sm->worker_in2out_cb (&ip, fib_index));
3947 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
3949 key.addr.as_u32 = addr->as_u32;
3950 key.port = clib_host_to_net_u16 (port);
3951 key.protocol = proto;
3952 key.fib_index = fib_index;
3953 kv.key = key.as_u64;
3954 t = is_in ? &tsm->in2out : &tsm->out2in;
3955 if (!clib_bihash_search_8_8 (t, &kv, &value))
3957 if (pool_is_free_index (tsm->sessions, value.value))
3958 return VNET_API_ERROR_UNSPECIFIED;
3960 s = pool_elt_at_index (tsm->sessions, value.value);
3961 nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
3962 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
3966 return VNET_API_ERROR_NO_SUCH_ENTRY;
3970 nat44_del_ed_session (snat_main_t * sm, ip4_address_t * addr, u16 port,
3971 ip4_address_t * eh_addr, u16 eh_port, u8 proto,
3972 u32 vrf_id, int is_in)
3975 clib_bihash_16_8_t *t;
3976 nat_ed_ses_key_t key;
3977 clib_bihash_kv_16_8_t kv, value;
3978 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3980 snat_main_per_thread_data_t *tsm;
3982 if (!sm->endpoint_dependent)
3983 return VNET_API_ERROR_FEATURE_DISABLED;
3985 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3986 if (sm->num_workers > 1)
3988 vec_elt_at_index (sm->per_thread_data,
3989 sm->worker_in2out_cb (&ip, fib_index));
3991 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
3993 t = is_in ? &tsm->in2out_ed : &tsm->out2in_ed;
3994 key.l_addr.as_u32 = addr->as_u32;
3995 key.r_addr.as_u32 = eh_addr->as_u32;
3996 key.l_port = clib_host_to_net_u16 (port);
3997 key.r_port = clib_host_to_net_u16 (eh_port);
3999 key.fib_index = fib_index;
4000 kv.key[0] = key.as_u64[0];
4001 kv.key[1] = key.as_u64[1];
4002 if (clib_bihash_search_16_8 (t, &kv, &value))
4003 return VNET_API_ERROR_NO_SUCH_ENTRY;
4005 if (pool_is_free_index (tsm->sessions, value.value))
4006 return VNET_API_ERROR_UNSPECIFIED;
4007 s = pool_elt_at_index (tsm->sessions, value.value);
4008 nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
4009 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
4014 nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length)
4016 snat_main_t *sm = &snat_main;
4018 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_MAPE;
4019 sm->alloc_addr_and_port = nat_alloc_addr_and_port_mape;
4021 sm->psid_offset = psid_offset;
4022 sm->psid_length = psid_length;
4026 nat_set_alloc_addr_and_port_range (u16 start_port, u16 end_port)
4028 snat_main_t *sm = &snat_main;
4030 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_RANGE;
4031 sm->alloc_addr_and_port = nat_alloc_addr_and_port_range;
4032 sm->start_port = start_port;
4033 sm->end_port = end_port;
4037 nat_set_alloc_addr_and_port_default (void)
4039 snat_main_t *sm = &snat_main;
4041 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_DEFAULT;
4042 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;
4046 * fd.io coding-style-patch-verification: ON
4049 * eval: (c-set-style "gnu")