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 (NAT)",
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 if (snat_is_unk_proto_session (s))
193 ed_key.proto = s->in2out.port;
199 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
200 ed_key.l_port = s->in2out.port;
201 ed_key.r_port = s->ext_host_port;
203 ed_key.l_addr = s->in2out.addr;
204 ed_key.r_addr = s->ext_host_addr;
205 ed_key.fib_index = 0;
206 ed_kv.key[0] = ed_key.as_u64[0];
207 ed_kv.key[1] = ed_key.as_u64[1];
208 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
209 nat_elog_warn ("in2out_ed key del failed");
213 /* session lookup tables */
214 if (is_ed_session (s))
216 if (is_affinity_sessions (s))
217 nat_affinity_unlock (s->ext_host_addr, s->out2in.addr,
218 s->in2out.protocol, s->out2in.port);
219 ed_key.l_addr = s->out2in.addr;
220 ed_key.r_addr = s->ext_host_addr;
221 ed_key.fib_index = s->out2in.fib_index;
222 if (snat_is_unk_proto_session (s))
224 ed_key.proto = s->in2out.port;
230 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
231 ed_key.l_port = s->out2in.port;
232 ed_key.r_port = s->ext_host_port;
234 ed_kv.key[0] = ed_key.as_u64[0];
235 ed_kv.key[1] = ed_key.as_u64[1];
236 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
237 nat_elog_warn ("out2in_ed key del failed");
238 ed_key.l_addr = s->in2out.addr;
239 ed_key.fib_index = s->in2out.fib_index;
240 if (!snat_is_unk_proto_session (s))
241 ed_key.l_port = s->in2out.port;
242 if (is_twice_nat_session (s))
244 ed_key.r_addr = s->ext_host_nat_addr;
245 ed_key.r_port = s->ext_host_nat_port;
247 ed_kv.key[0] = ed_key.as_u64[0];
248 ed_kv.key[1] = ed_key.as_u64[1];
249 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
250 nat_elog_warn ("in2out_ed key del failed");
253 nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
254 &s->in2out.addr, s->in2out.port,
255 &s->ext_host_nat_addr, s->ext_host_nat_port,
256 &s->out2in.addr, s->out2in.port,
257 &s->ext_host_addr, s->ext_host_port,
258 s->in2out.protocol, is_twice_nat_session (s));
262 kv.key = s->in2out.as_u64;
263 if (clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 0))
264 nat_elog_warn ("in2out key del failed");
265 kv.key = s->out2in.as_u64;
266 if (clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 0))
267 nat_elog_warn ("out2in key del failed");
270 nat_syslog_nat44_apmdel (s->user_index, s->in2out.fib_index,
271 &s->in2out.addr, s->in2out.port,
272 &s->out2in.addr, s->out2in.port,
276 if (snat_is_unk_proto_session (s))
282 snat_ipfix_logging_nat44_ses_delete (thread_index,
283 s->in2out.addr.as_u32,
284 s->out2in.addr.as_u32,
288 s->in2out.fib_index);
290 nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
291 s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
295 /* Twice NAT address and port for external host */
296 if (is_twice_nat_session (s))
298 key.protocol = s->in2out.protocol;
299 key.port = s->ext_host_nat_port;
300 key.addr.as_u32 = s->ext_host_nat_addr.as_u32;
301 snat_free_outside_address_and_port (sm->twice_nat_addresses,
305 if (snat_is_session_static (s))
308 snat_free_outside_address_and_port (sm->addresses, thread_index,
313 nat_user_get_or_create (snat_main_t * sm, ip4_address_t * addr, u32 fib_index,
317 snat_user_key_t user_key;
318 clib_bihash_kv_8_8_t kv, value;
319 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
320 dlist_elt_t *per_user_list_head_elt;
322 user_key.addr.as_u32 = addr->as_u32;
323 user_key.fib_index = fib_index;
324 kv.key = user_key.as_u64;
326 /* Ever heard of the "user" = src ip4 address before? */
327 if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
329 /* no, make a new one */
330 pool_get (tsm->users, u);
331 clib_memset (u, 0, sizeof (*u));
332 u->addr.as_u32 = addr->as_u32;
333 u->fib_index = fib_index;
335 pool_get (tsm->list_pool, per_user_list_head_elt);
337 u->sessions_per_user_list_head_index = per_user_list_head_elt -
340 clib_dlist_init (tsm->list_pool, u->sessions_per_user_list_head_index);
342 kv.value = u - tsm->users;
345 if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1))
346 nat_elog_warn ("user_hash keay add failed");
348 vlib_set_simple_counter (&sm->total_users, thread_index, 0,
349 pool_elts (tsm->users));
353 u = pool_elt_at_index (tsm->users, value.value);
360 nat_session_alloc_or_recycle (snat_main_t * sm, snat_user_t * u,
361 u32 thread_index, f64 now)
364 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
365 u32 oldest_per_user_translation_list_index, session_index;
366 dlist_elt_t *oldest_per_user_translation_list_elt;
367 dlist_elt_t *per_user_translation_list_elt;
369 /* Over quota? Recycle the least recently used translation */
370 if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
372 oldest_per_user_translation_list_index =
373 clib_dlist_remove_head (tsm->list_pool,
374 u->sessions_per_user_list_head_index);
376 ASSERT (oldest_per_user_translation_list_index != ~0);
378 /* Add it back to the end of the LRU list */
379 clib_dlist_addtail (tsm->list_pool,
380 u->sessions_per_user_list_head_index,
381 oldest_per_user_translation_list_index);
382 /* Get the list element */
383 oldest_per_user_translation_list_elt =
384 pool_elt_at_index (tsm->list_pool,
385 oldest_per_user_translation_list_index);
387 /* Get the session index from the list element */
388 session_index = oldest_per_user_translation_list_elt->value;
390 /* Get the session */
391 s = pool_elt_at_index (tsm->sessions, session_index);
392 nat_free_session_data (sm, s, thread_index, 0);
393 if (snat_is_session_static (s))
394 u->nstaticsessions--;
401 s->ext_host_addr.as_u32 = 0;
402 s->ext_host_port = 0;
403 s->ext_host_nat_addr.as_u32 = 0;
404 s->ext_host_nat_port = 0;
408 pool_get (tsm->sessions, s);
409 clib_memset (s, 0, sizeof (*s));
411 /* Create list elts */
412 pool_get (tsm->list_pool, per_user_translation_list_elt);
413 clib_dlist_init (tsm->list_pool,
414 per_user_translation_list_elt - tsm->list_pool);
416 per_user_translation_list_elt->value = s - tsm->sessions;
417 s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
418 s->per_user_list_head_index = u->sessions_per_user_list_head_index;
420 clib_dlist_addtail (tsm->list_pool,
421 s->per_user_list_head_index,
422 per_user_translation_list_elt - tsm->list_pool);
424 s->user_index = u - tsm->users;
425 vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
426 pool_elts (tsm->sessions));
429 s->ha_last_refreshed = now;
435 nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index,
439 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
440 dlist_elt_t *per_user_translation_list_elt, *oldest_elt;
442 u64 sess_timeout_time;
444 if (PREDICT_FALSE (!(u->nsessions) && !(u->nstaticsessions)))
448 clib_dlist_remove_head (tsm->list_pool,
449 u->sessions_per_user_list_head_index);
450 oldest_elt = pool_elt_at_index (tsm->list_pool, oldest_index);
451 s = pool_elt_at_index (tsm->sessions, oldest_elt->value);
452 sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
453 if (now >= sess_timeout_time)
455 clib_dlist_addtail (tsm->list_pool,
456 u->sessions_per_user_list_head_index, oldest_index);
457 nat_free_session_data (sm, s, thread_index, 0);
458 if (snat_is_session_static (s))
459 u->nstaticsessions--;
466 s->ext_host_addr.as_u32 = 0;
467 s->ext_host_port = 0;
468 s->ext_host_nat_addr.as_u32 = 0;
469 s->ext_host_nat_port = 0;
473 clib_dlist_addhead (tsm->list_pool,
474 u->sessions_per_user_list_head_index, oldest_index);
475 if ((u->nsessions + u->nstaticsessions) >=
476 sm->max_translations_per_user)
478 nat_elog_addr (SNAT_LOG_WARNING, "[warn] max translations per user",
479 clib_net_to_host_u32 (u->addr.as_u32));
480 snat_ipfix_logging_max_entries_per_user
481 (thread_index, sm->max_translations_per_user, u->addr.as_u32);
487 pool_get (tsm->sessions, s);
488 clib_memset (s, 0, sizeof (*s));
490 /* Create list elts */
491 pool_get (tsm->list_pool, per_user_translation_list_elt);
492 clib_dlist_init (tsm->list_pool,
493 per_user_translation_list_elt - tsm->list_pool);
495 per_user_translation_list_elt->value = s - tsm->sessions;
496 s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
497 s->per_user_list_head_index = u->sessions_per_user_list_head_index;
499 clib_dlist_addtail (tsm->list_pool,
500 s->per_user_list_head_index,
501 per_user_translation_list_elt - tsm->list_pool);
504 vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
505 pool_elts (tsm->sessions));
508 s->ha_last_refreshed = now;
514 snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index,
517 fib_prefix_t prefix = {
519 .fp_proto = FIB_PROTOCOL_IP4,
521 .ip4.as_u32 = addr->as_u32,
524 u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
527 fib_table_entry_update_one_path (fib_index,
529 FIB_SOURCE_PLUGIN_LOW,
530 (FIB_ENTRY_FLAG_CONNECTED |
531 FIB_ENTRY_FLAG_LOCAL |
532 FIB_ENTRY_FLAG_EXCLUSIVE),
536 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
538 fib_table_entry_delete (fib_index, &prefix, FIB_SOURCE_PLUGIN_LOW);
542 snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id,
547 vlib_thread_main_t *tm = vlib_get_thread_main ();
549 if (twice_nat && !sm->endpoint_dependent)
550 return VNET_API_ERROR_FEATURE_DISABLED;
552 /* Check if address already exists */
554 vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses)
556 if (ap->addr.as_u32 == addr->as_u32)
557 return VNET_API_ERROR_VALUE_EXIST;
562 vec_add2 (sm->twice_nat_addresses, ap, 1);
564 vec_add2 (sm->addresses, ap, 1);
569 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
570 FIB_SOURCE_PLUGIN_LOW);
573 #define _(N, i, n, s) \
574 clib_bitmap_alloc (ap->busy_##n##_port_bitmap, 65535); \
575 ap->busy_##n##_ports = 0; \
576 ap->busy_##n##_ports_per_thread = 0;\
577 vec_validate_init_empty (ap->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
578 foreach_snat_protocol
583 /* Add external address to FIB */
585 pool_foreach (i, sm->interfaces,
587 if (nat_interface_is_inside(i) || sm->out2in_dpo)
590 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
593 pool_foreach (i, sm->output_feature_interfaces,
595 if (nat_interface_is_inside(i) || sm->out2in_dpo)
598 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
607 is_snat_address_used_in_static_mapping (snat_main_t * sm, ip4_address_t addr)
609 snat_static_mapping_t *m;
611 pool_foreach (m, sm->static_mappings,
613 if (is_addr_only_static_mapping (m) ||
614 is_out2in_only_static_mapping (m) ||
615 is_identity_static_mapping (m))
617 if (m->external_addr.as_u32 == addr.as_u32)
626 increment_v4_address (ip4_address_t * a)
630 v = clib_net_to_host_u32 (a->as_u32) + 1;
631 a->as_u32 = clib_host_to_net_u32 (v);
635 snat_add_static_mapping_when_resolved (snat_main_t * sm,
636 ip4_address_t l_addr,
641 snat_protocol_t proto,
642 int addr_only, int is_add, u8 * tag,
643 int twice_nat, int out2in_only,
646 snat_static_map_resolve_t *rp;
648 vec_add2 (sm->to_resolve, rp, 1);
649 rp->l_addr.as_u32 = l_addr.as_u32;
651 rp->sw_if_index = sw_if_index;
655 rp->addr_only = addr_only;
657 rp->twice_nat = twice_nat;
658 rp->out2in_only = out2in_only;
659 rp->identity_nat = identity_nat;
660 rp->tag = vec_dup (tag);
664 get_thread_idx_by_port (u16 e_port)
666 snat_main_t *sm = &snat_main;
667 u32 thread_idx = sm->num_workers;
668 if (sm->num_workers > 1)
671 sm->first_worker_index +
672 sm->workers[(e_port - 1024) / sm->port_per_thread];
678 snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
679 u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
680 u32 sw_if_index, snat_protocol_t proto, int is_add,
681 twice_nat_type_t twice_nat, u8 out2in_only, u8 * tag,
684 snat_main_t *sm = &snat_main;
685 snat_static_mapping_t *m;
686 snat_session_key_t m_key;
687 clib_bihash_kv_8_8_t kv, value;
688 snat_address_t *a = 0;
690 snat_interface_t *interface;
692 snat_main_per_thread_data_t *tsm;
693 snat_user_key_t u_key;
695 dlist_elt_t *head, *elt;
696 u32 elt_index, head_index;
700 snat_static_map_resolve_t *rp, *rp_match = 0;
701 nat44_lb_addr_port_t *local;
704 if (!sm->endpoint_dependent)
706 if (twice_nat || out2in_only)
707 return VNET_API_ERROR_FEATURE_DISABLED;
710 /* If the external address is a specific interface address */
711 if (sw_if_index != ~0)
713 ip4_address_t *first_int_addr;
715 for (i = 0; i < vec_len (sm->to_resolve); i++)
717 rp = sm->to_resolve + i;
718 if (rp->sw_if_index != sw_if_index ||
719 rp->l_addr.as_u32 != l_addr.as_u32 ||
720 rp->vrf_id != vrf_id || rp->addr_only != addr_only)
725 if ((rp->l_port != l_port && rp->e_port != e_port)
726 || rp->proto != proto)
734 /* Might be already set... */
735 first_int_addr = ip4_interface_first_address
736 (sm->ip4_main, sw_if_index, 0 /* just want the address */ );
741 return VNET_API_ERROR_VALUE_EXIST;
743 snat_add_static_mapping_when_resolved
744 (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
745 addr_only, is_add, tag, twice_nat, out2in_only, identity_nat);
747 /* DHCP resolution required? */
748 if (first_int_addr == 0)
754 e_addr.as_u32 = first_int_addr->as_u32;
755 /* Identity mapping? */
756 if (l_addr.as_u32 == 0)
757 l_addr.as_u32 = e_addr.as_u32;
763 return VNET_API_ERROR_NO_SUCH_ENTRY;
765 vec_del1 (sm->to_resolve, i);
769 e_addr.as_u32 = first_int_addr->as_u32;
770 /* Identity mapping? */
771 if (l_addr.as_u32 == 0)
772 l_addr.as_u32 = e_addr.as_u32;
780 m_key.port = addr_only ? 0 : e_port;
781 m_key.protocol = addr_only ? 0 : proto;
783 kv.key = m_key.as_u64;
784 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
787 m = pool_elt_at_index (sm->static_mappings, value.value);
793 if (is_identity_static_mapping (m))
796 pool_foreach (local, m->locals,
798 if (local->vrf_id == vrf_id)
799 return VNET_API_ERROR_VALUE_EXIST;
802 pool_get (m->locals, local);
803 local->vrf_id = vrf_id;
805 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
806 FIB_SOURCE_PLUGIN_LOW);
807 m_key.addr = m->local_addr;
808 m_key.port = m->local_port;
809 m_key.protocol = m->proto;
810 m_key.fib_index = local->fib_index;
811 kv.key = m_key.as_u64;
812 kv.value = m - sm->static_mappings;
813 clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1);
817 return VNET_API_ERROR_VALUE_EXIST;
820 if (twice_nat && addr_only)
821 return VNET_API_ERROR_UNSUPPORTED;
823 /* Convert VRF id to FIB index */
826 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
827 FIB_SOURCE_PLUGIN_LOW);
828 /* If not specified use inside VRF id from SNAT plugin startup config */
831 fib_index = sm->inside_fib_index;
832 vrf_id = sm->inside_vrf_id;
833 fib_table_lock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_PLUGIN_LOW);
836 if (!(out2in_only || identity_nat))
839 m_key.port = addr_only ? 0 : l_port;
840 m_key.protocol = addr_only ? 0 : proto;
841 m_key.fib_index = fib_index;
842 kv.key = m_key.as_u64;
843 if (!clib_bihash_search_8_8
844 (&sm->static_mapping_by_local, &kv, &value))
845 return VNET_API_ERROR_VALUE_EXIST;
848 /* Find external address in allocated addresses and reserve port for
849 address and port pair mapping when dynamic translations enabled */
850 if (!(addr_only || sm->static_mapping_only || out2in_only))
852 for (i = 0; i < vec_len (sm->addresses); i++)
854 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
856 a = sm->addresses + i;
857 /* External port must be unused */
860 #define _(N, j, n, s) \
861 case SNAT_PROTOCOL_##N: \
862 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
863 return VNET_API_ERROR_INVALID_VALUE; \
864 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
867 a->busy_##n##_ports++; \
868 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \
871 foreach_snat_protocol
874 nat_elog_info ("unknown protocol");
875 return VNET_API_ERROR_INVALID_VALUE_2;
880 /* External address must be allocated */
881 if (!a && (l_addr.as_u32 != e_addr.as_u32))
883 if (sw_if_index != ~0)
885 for (i = 0; i < vec_len (sm->to_resolve); i++)
887 rp = sm->to_resolve + i;
890 if (rp->sw_if_index != sw_if_index &&
891 rp->l_addr.as_u32 != l_addr.as_u32 &&
892 rp->vrf_id != vrf_id && rp->l_port != l_port &&
893 rp->e_port != e_port && rp->proto != proto)
896 vec_del1 (sm->to_resolve, i);
900 return VNET_API_ERROR_NO_SUCH_ENTRY;
904 pool_get (sm->static_mappings, m);
905 clib_memset (m, 0, sizeof (*m));
906 m->tag = vec_dup (tag);
907 m->local_addr = l_addr;
908 m->external_addr = e_addr;
909 m->twice_nat = twice_nat;
911 m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY;
913 m->flags |= NAT_STATIC_MAPPING_FLAG_ADDR_ONLY;
916 m->flags |= NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT;
917 pool_get (m->locals, local);
918 local->vrf_id = vrf_id;
919 local->fib_index = fib_index;
924 m->fib_index = fib_index;
928 m->local_port = l_port;
929 m->external_port = e_port;
933 if (sm->num_workers > 1)
936 .src_address = m->local_addr,
938 vec_add1 (m->workers, sm->worker_in2out_cb (&ip, m->fib_index));
939 tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
942 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
944 m_key.addr = m->local_addr;
945 m_key.port = m->local_port;
946 m_key.protocol = m->proto;
947 m_key.fib_index = fib_index;
948 kv.key = m_key.as_u64;
949 kv.value = m - sm->static_mappings;
951 clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1);
953 m_key.addr = m->external_addr;
954 m_key.port = m->external_port;
956 kv.key = m_key.as_u64;
957 kv.value = m - sm->static_mappings;
958 clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1);
960 /* Delete dynamic sessions matching local address (+ local port) */
961 if (!(sm->static_mapping_only))
963 u_key.addr = m->local_addr;
964 u_key.fib_index = m->fib_index;
965 kv.key = u_key.as_u64;
966 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
968 user_index = value.value;
969 u = pool_elt_at_index (tsm->users, user_index);
972 head_index = u->sessions_per_user_list_head_index;
973 head = pool_elt_at_index (tsm->list_pool, head_index);
974 elt_index = head->next;
975 elt = pool_elt_at_index (tsm->list_pool, elt_index);
976 ses_index = elt->value;
977 while (ses_index != ~0)
979 s = pool_elt_at_index (tsm->sessions, ses_index);
980 elt = pool_elt_at_index (tsm->list_pool, elt->next);
981 ses_index = elt->value;
983 if (snat_is_session_static (s))
987 && (clib_net_to_host_u16 (s->in2out.port) !=
991 nat_free_session_data (sm, s,
992 tsm - sm->per_thread_data, 0);
993 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
995 if (!addr_only && !sm->endpoint_dependent)
1006 if (sw_if_index != ~0)
1009 return VNET_API_ERROR_NO_SUCH_ENTRY;
1015 vrf_id = sm->inside_vrf_id;
1018 pool_foreach (local, m->locals,
1020 if (local->vrf_id == vrf_id)
1021 find = local - m->locals;
1025 return VNET_API_ERROR_NO_SUCH_ENTRY;
1027 local = pool_elt_at_index (m->locals, find);
1028 fib_index = local->fib_index;
1029 pool_put (m->locals, local);
1032 fib_index = m->fib_index;
1034 /* Free external address port */
1035 if (!(addr_only || sm->static_mapping_only || out2in_only))
1037 for (i = 0; i < vec_len (sm->addresses); i++)
1039 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1041 a = sm->addresses + i;
1044 #define _(N, j, n, s) \
1045 case SNAT_PROTOCOL_##N: \
1046 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1047 if (e_port > 1024) \
1049 a->busy_##n##_ports--; \
1050 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \
1053 foreach_snat_protocol
1056 nat_elog_info ("unknown protocol");
1057 return VNET_API_ERROR_INVALID_VALUE_2;
1064 if (sm->num_workers > 1)
1065 tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
1067 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1069 m_key.addr = m->local_addr;
1070 m_key.port = m->local_port;
1071 m_key.protocol = m->proto;
1072 m_key.fib_index = fib_index;
1073 kv.key = m_key.as_u64;
1075 clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0);
1077 /* Delete session(s) for static mapping if exist */
1078 if (!(sm->static_mapping_only) ||
1079 (sm->static_mapping_only && sm->static_mapping_connection_tracking))
1081 u_key.addr = m->local_addr;
1082 u_key.fib_index = fib_index;
1083 kv.key = u_key.as_u64;
1084 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1086 user_index = value.value;
1087 u = pool_elt_at_index (tsm->users, user_index);
1088 if (u->nstaticsessions)
1090 head_index = u->sessions_per_user_list_head_index;
1091 head = pool_elt_at_index (tsm->list_pool, head_index);
1092 elt_index = head->next;
1093 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1094 ses_index = elt->value;
1095 while (ses_index != ~0)
1097 s = pool_elt_at_index (tsm->sessions, ses_index);
1098 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1099 ses_index = elt->value;
1103 if ((s->out2in.addr.as_u32 != e_addr.as_u32) ||
1104 (clib_net_to_host_u16 (s->out2in.port) !=
1109 if (is_lb_session (s))
1112 if (!snat_is_session_static (s))
1115 nat_free_session_data (sm, s,
1116 tsm - sm->per_thread_data, 0);
1117 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1119 if (!addr_only && !sm->endpoint_dependent)
1126 fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_PLUGIN_LOW);
1127 if (pool_elts (m->locals))
1130 m_key.addr = m->external_addr;
1131 m_key.port = m->external_port;
1132 m_key.fib_index = 0;
1133 kv.key = m_key.as_u64;
1134 clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0);
1137 vec_free (m->workers);
1138 /* Delete static mapping from pool */
1139 pool_put (sm->static_mappings, m);
1142 if (!addr_only || (l_addr.as_u32 == e_addr.as_u32))
1145 /* Add/delete external address to FIB */
1147 pool_foreach (interface, sm->interfaces,
1149 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1152 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1155 pool_foreach (interface, sm->output_feature_interfaces,
1157 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1160 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1169 nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
1170 snat_protocol_t proto,
1171 nat44_lb_addr_port_t * locals, u8 is_add,
1172 twice_nat_type_t twice_nat, u8 out2in_only,
1173 u8 * tag, u32 affinity)
1175 snat_main_t *sm = &snat_main;
1176 snat_static_mapping_t *m;
1177 snat_session_key_t m_key;
1178 clib_bihash_kv_8_8_t kv, value;
1179 snat_address_t *a = 0;
1181 nat44_lb_addr_port_t *local;
1182 u32 elt_index, head_index, ses_index;
1183 snat_main_per_thread_data_t *tsm;
1184 snat_user_key_t u_key;
1187 dlist_elt_t *head, *elt;
1190 if (!sm->endpoint_dependent)
1191 return VNET_API_ERROR_FEATURE_DISABLED;
1193 m_key.addr = e_addr;
1194 m_key.port = e_port;
1195 m_key.protocol = proto;
1196 m_key.fib_index = 0;
1197 kv.key = m_key.as_u64;
1198 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
1201 m = pool_elt_at_index (sm->static_mappings, value.value);
1206 return VNET_API_ERROR_VALUE_EXIST;
1208 if (vec_len (locals) < 2)
1209 return VNET_API_ERROR_INVALID_VALUE;
1211 /* Find external address in allocated addresses and reserve port for
1212 address and port pair mapping when dynamic translations enabled */
1213 if (!(sm->static_mapping_only || out2in_only))
1215 for (i = 0; i < vec_len (sm->addresses); i++)
1217 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1219 a = sm->addresses + i;
1220 /* External port must be unused */
1223 #define _(N, j, n, s) \
1224 case SNAT_PROTOCOL_##N: \
1225 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
1226 return VNET_API_ERROR_INVALID_VALUE; \
1227 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
1228 if (e_port > 1024) \
1230 a->busy_##n##_ports++; \
1231 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \
1234 foreach_snat_protocol
1237 nat_elog_info ("unknown protocol");
1238 return VNET_API_ERROR_INVALID_VALUE_2;
1243 /* External address must be allocated */
1245 return VNET_API_ERROR_NO_SUCH_ENTRY;
1248 pool_get (sm->static_mappings, m);
1249 clib_memset (m, 0, sizeof (*m));
1250 m->tag = vec_dup (tag);
1251 m->external_addr = e_addr;
1252 m->external_port = e_port;
1254 m->twice_nat = twice_nat;
1255 m->flags |= NAT_STATIC_MAPPING_FLAG_LB;
1257 m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY;
1258 m->affinity = affinity;
1261 m->affinity_per_service_list_head_index =
1262 nat_affinity_get_per_service_list_head_index ();
1264 m->affinity_per_service_list_head_index = ~0;
1266 m_key.addr = m->external_addr;
1267 m_key.port = m->external_port;
1268 m_key.protocol = m->proto;
1269 m_key.fib_index = 0;
1270 kv.key = m_key.as_u64;
1271 kv.value = m - sm->static_mappings;
1272 if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1))
1274 nat_elog_err ("static_mapping_by_external key add failed");
1275 return VNET_API_ERROR_UNSPECIFIED;
1278 m_key.fib_index = m->fib_index;
1279 for (i = 0; i < vec_len (locals); i++)
1281 locals[i].fib_index =
1282 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
1284 FIB_SOURCE_PLUGIN_LOW);
1285 m_key.addr = locals[i].addr;
1286 m_key.fib_index = locals[i].fib_index;
1289 m_key.port = locals[i].port;
1290 kv.key = m_key.as_u64;
1291 kv.value = m - sm->static_mappings;
1292 clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1);
1294 locals[i].prefix = (i == 0) ? locals[i].probability :
1295 (locals[i - 1].prefix + locals[i].probability);
1296 pool_get (m->locals, local);
1298 if (sm->num_workers > 1)
1301 .src_address = locals[i].addr,
1304 clib_bitmap_set (bitmap,
1305 sm->worker_in2out_cb (&ip, m->fib_index), 1);
1309 /* Assign workers */
1310 if (sm->num_workers > 1)
1313 clib_bitmap_foreach (i, bitmap,
1315 vec_add1(m->workers, i);
1323 return VNET_API_ERROR_NO_SUCH_ENTRY;
1325 if (!is_lb_static_mapping (m))
1326 return VNET_API_ERROR_INVALID_VALUE;
1328 /* Free external address port */
1329 if (!(sm->static_mapping_only || out2in_only))
1331 for (i = 0; i < vec_len (sm->addresses); i++)
1333 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1335 a = sm->addresses + i;
1338 #define _(N, j, n, s) \
1339 case SNAT_PROTOCOL_##N: \
1340 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1341 if (e_port > 1024) \
1343 a->busy_##n##_ports--; \
1344 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \
1347 foreach_snat_protocol
1350 nat_elog_info ("unknown protocol");
1351 return VNET_API_ERROR_INVALID_VALUE_2;
1358 m_key.addr = m->external_addr;
1359 m_key.port = m->external_port;
1360 m_key.protocol = m->proto;
1361 m_key.fib_index = 0;
1362 kv.key = m_key.as_u64;
1363 if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0))
1365 nat_elog_err ("static_mapping_by_external key del failed");
1366 return VNET_API_ERROR_UNSPECIFIED;
1370 pool_foreach (local, m->locals,
1372 fib_table_unlock (local->fib_index, FIB_PROTOCOL_IP4,
1373 FIB_SOURCE_PLUGIN_LOW);
1374 m_key.addr = local->addr;
1377 m_key.port = local->port;
1378 m_key.fib_index = local->fib_index;
1379 kv.key = m_key.as_u64;
1380 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0))
1382 nat_elog_err ("static_mapping_by_local key del failed");
1383 return VNET_API_ERROR_UNSPECIFIED;
1387 if (sm->num_workers > 1)
1390 .src_address = local->addr,
1392 tsm = vec_elt_at_index (sm->per_thread_data,
1393 sm->worker_in2out_cb (&ip, m->fib_index));
1396 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1398 /* Delete sessions */
1399 u_key.addr = local->addr;
1400 u_key.fib_index = local->fib_index;
1401 kv.key = u_key.as_u64;
1402 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1404 u = pool_elt_at_index (tsm->users, value.value);
1405 if (u->nstaticsessions)
1407 head_index = u->sessions_per_user_list_head_index;
1408 head = pool_elt_at_index (tsm->list_pool, head_index);
1409 elt_index = head->next;
1410 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1411 ses_index = elt->value;
1412 while (ses_index != ~0)
1414 s = pool_elt_at_index (tsm->sessions, ses_index);
1415 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1416 ses_index = elt->value;
1418 if (!(is_lb_session (s)))
1421 if ((s->in2out.addr.as_u32 != local->addr.as_u32) ||
1422 (clib_net_to_host_u16 (s->in2out.port) != local->port))
1425 nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
1426 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1433 nat_affinity_flush_service (m->affinity_per_service_list_head_index);
1434 pool_free (m->locals);
1436 vec_free (m->workers);
1438 pool_put (sm->static_mappings, m);
1445 nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port,
1446 ip4_address_t l_addr, u16 l_port,
1447 snat_protocol_t proto, u32 vrf_id,
1448 u8 probability, u8 is_add)
1450 snat_main_t *sm = &snat_main;
1451 snat_static_mapping_t *m = 0;
1452 snat_session_key_t m_key;
1453 clib_bihash_kv_8_8_t kv, value;
1454 nat44_lb_addr_port_t *local, *prev_local, *match_local = 0;
1455 snat_main_per_thread_data_t *tsm;
1456 snat_user_key_t u_key;
1459 dlist_elt_t *head, *elt;
1460 u32 elt_index, head_index, ses_index, *locals = 0;
1464 if (!sm->endpoint_dependent)
1465 return VNET_API_ERROR_FEATURE_DISABLED;
1467 m_key.addr = e_addr;
1468 m_key.port = e_port;
1469 m_key.protocol = proto;
1470 m_key.fib_index = 0;
1471 kv.key = m_key.as_u64;
1472 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
1473 m = pool_elt_at_index (sm->static_mappings, value.value);
1476 return VNET_API_ERROR_NO_SUCH_ENTRY;
1478 if (!is_lb_static_mapping (m))
1479 return VNET_API_ERROR_INVALID_VALUE;
1482 pool_foreach (local, m->locals,
1484 if ((local->addr.as_u32 == l_addr.as_u32) && (local->port == l_port) &&
1485 (local->vrf_id == vrf_id))
1487 match_local = local;
1496 return VNET_API_ERROR_VALUE_EXIST;
1498 pool_get (m->locals, local);
1499 clib_memset (local, 0, sizeof (*local));
1500 local->addr.as_u32 = l_addr.as_u32;
1501 local->port = l_port;
1502 local->probability = probability;
1503 local->vrf_id = vrf_id;
1505 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
1506 FIB_SOURCE_PLUGIN_LOW);
1508 if (!is_out2in_only_static_mapping (m))
1510 m_key.addr = l_addr;
1511 m_key.port = l_port;
1512 m_key.fib_index = local->fib_index;
1513 kv.key = m_key.as_u64;
1514 kv.value = m - sm->static_mappings;
1515 if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1))
1516 nat_elog_err ("static_mapping_by_local key add failed");
1522 return VNET_API_ERROR_NO_SUCH_ENTRY;
1524 if (pool_elts (m->locals) < 3)
1525 return VNET_API_ERROR_UNSPECIFIED;
1527 fib_table_unlock (match_local->fib_index, FIB_PROTOCOL_IP4,
1528 FIB_SOURCE_PLUGIN_LOW);
1530 if (!is_out2in_only_static_mapping (m))
1532 m_key.addr = l_addr;
1533 m_key.port = l_port;
1534 m_key.fib_index = match_local->fib_index;
1535 kv.key = m_key.as_u64;
1536 if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0))
1537 nat_elog_err ("static_mapping_by_local key del failed");
1540 if (sm->num_workers > 1)
1543 .src_address = local->addr,
1545 tsm = vec_elt_at_index (sm->per_thread_data,
1546 sm->worker_in2out_cb (&ip, m->fib_index));
1549 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1551 /* Delete sessions */
1552 u_key.addr = match_local->addr;
1553 u_key.fib_index = match_local->fib_index;
1554 kv.key = u_key.as_u64;
1555 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1557 u = pool_elt_at_index (tsm->users, value.value);
1558 if (u->nstaticsessions)
1560 head_index = u->sessions_per_user_list_head_index;
1561 head = pool_elt_at_index (tsm->list_pool, head_index);
1562 elt_index = head->next;
1563 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1564 ses_index = elt->value;
1565 while (ses_index != ~0)
1567 s = pool_elt_at_index (tsm->sessions, ses_index);
1568 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1569 ses_index = elt->value;
1571 if (!(is_lb_session (s)))
1574 if ((s->in2out.addr.as_u32 != match_local->addr.as_u32) ||
1575 (clib_net_to_host_u16 (s->in2out.port) !=
1579 nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
1580 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1585 pool_put (m->locals, match_local);
1588 vec_free (m->workers);
1591 pool_foreach (local, m->locals,
1593 vec_add1 (locals, local - m->locals);
1594 if (sm->num_workers > 1)
1597 ip.src_address.as_u32 = local->addr.as_u32,
1598 bitmap = clib_bitmap_set (bitmap,
1599 sm->worker_in2out_cb (&ip, local->fib_index),
1605 ASSERT (vec_len (locals) > 1);
1607 local = pool_elt_at_index (m->locals, locals[0]);
1608 local->prefix = local->probability;
1609 for (i = 1; i < vec_len (locals); i++)
1611 local = pool_elt_at_index (m->locals, locals[i]);
1612 prev_local = pool_elt_at_index (m->locals, locals[i - 1]);
1613 local->prefix = local->probability + prev_local->prefix;
1616 /* Assign workers */
1617 if (sm->num_workers > 1)
1620 clib_bitmap_foreach (i, bitmap, ({ vec_add1(m->workers, i); }));
1628 snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm,
1631 snat_address_t *a = 0;
1632 snat_session_t *ses;
1633 u32 *ses_to_be_removed = 0, *ses_index;
1634 snat_main_per_thread_data_t *tsm;
1635 snat_static_mapping_t *m;
1636 snat_interface_t *interface;
1638 snat_address_t *addresses =
1639 twice_nat ? sm->twice_nat_addresses : sm->addresses;
1641 /* Find SNAT address */
1642 for (i = 0; i < vec_len (addresses); i++)
1644 if (addresses[i].addr.as_u32 == addr.as_u32)
1651 return VNET_API_ERROR_NO_SUCH_ENTRY;
1656 pool_foreach (m, sm->static_mappings,
1658 if (m->external_addr.as_u32 == addr.as_u32)
1659 (void) snat_add_static_mapping (m->local_addr, m->external_addr,
1660 m->local_port, m->external_port,
1661 m->vrf_id, is_addr_only_static_mapping(m), ~0,
1662 m->proto, 0, m->twice_nat,
1663 is_out2in_only_static_mapping(m), m->tag, is_identity_static_mapping(m));
1669 /* Check if address is used in some static mapping */
1670 if (is_snat_address_used_in_static_mapping (sm, addr))
1672 nat_elog_notice ("address used in static mapping");
1673 return VNET_API_ERROR_UNSPECIFIED;
1677 if (a->fib_index != ~0)
1678 fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_PLUGIN_LOW);
1680 /* Delete sessions using address */
1681 if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports)
1684 vec_foreach (tsm, sm->per_thread_data)
1686 pool_foreach (ses, tsm->sessions, ({
1687 if (ses->out2in.addr.as_u32 == addr.as_u32)
1689 nat_free_session_data (sm, ses, tsm - sm->per_thread_data, 0);
1690 vec_add1 (ses_to_be_removed, ses - tsm->sessions);
1694 vec_foreach (ses_index, ses_to_be_removed)
1696 ses = pool_elt_at_index (tsm->sessions, ses_index[0]);
1697 nat44_delete_session (sm, ses, tsm - sm->per_thread_data);
1700 vec_free (ses_to_be_removed);
1705 #define _(N, i, n, s) \
1706 clib_bitmap_free (a->busy_##n##_port_bitmap); \
1707 vec_free (a->busy_##n##_ports_per_thread);
1708 foreach_snat_protocol
1712 vec_del1 (sm->twice_nat_addresses, i);
1716 vec_del1 (sm->addresses, i);
1718 /* Delete external address from FIB */
1720 pool_foreach (interface, sm->interfaces,
1722 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1725 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1728 pool_foreach (interface, sm->output_feature_interfaces,
1730 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1733 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1742 snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
1744 snat_main_t *sm = &snat_main;
1745 snat_interface_t *i;
1746 const char *feature_name, *del_feature_name;
1748 snat_static_mapping_t *m;
1750 nat_outside_fib_t *outside_fib;
1751 u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1754 if (sm->out2in_dpo && !is_inside)
1755 return VNET_API_ERROR_UNSUPPORTED;
1758 pool_foreach (i, sm->output_feature_interfaces,
1760 if (i->sw_if_index == sw_if_index)
1761 return VNET_API_ERROR_VALUE_EXIST;
1765 if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking))
1766 feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast";
1769 if (sm->num_workers > 1 && !sm->deterministic)
1771 is_inside ? "nat44-in2out-worker-handoff" :
1772 "nat44-out2in-worker-handoff";
1773 else if (sm->deterministic)
1774 feature_name = is_inside ? "nat44-det-in2out" : "nat44-det-out2in";
1775 else if (sm->endpoint_dependent)
1776 feature_name = is_inside ? "nat44-ed-in2out" : "nat44-ed-out2in";
1778 feature_name = is_inside ? "nat44-in2out" : "nat44-out2in";
1781 if (sm->fq_in2out_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1782 sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index,
1785 if (sm->fq_out2in_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1786 sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index,
1792 vec_foreach (outside_fib, sm->outside_fibs)
1794 if (outside_fib->fib_index == fib_index)
1798 outside_fib->refcount--;
1799 if (!outside_fib->refcount)
1800 vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs);
1803 outside_fib->refcount++;
1810 vec_add2 (sm->outside_fibs, outside_fib, 1);
1811 outside_fib->refcount = 1;
1812 outside_fib->fib_index = fib_index;
1817 pool_foreach (i, sm->interfaces,
1819 if (i->sw_if_index == sw_if_index)
1823 if (nat_interface_is_inside(i) && nat_interface_is_outside(i))
1826 i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE;
1828 i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE;
1830 if (sm->num_workers > 1 && !sm->deterministic)
1832 del_feature_name = "nat44-handoff-classify";
1833 feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1834 "nat44-out2in-worker-handoff";
1836 else if (sm->deterministic)
1838 del_feature_name = "nat44-det-classify";
1839 feature_name = !is_inside ? "nat44-det-in2out" :
1842 else if (sm->endpoint_dependent)
1844 del_feature_name = "nat44-ed-classify";
1845 feature_name = !is_inside ? "nat44-ed-in2out" :
1850 del_feature_name = "nat44-classify";
1851 feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1854 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1855 sw_if_index, 0, 0, 0);
1856 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1857 sw_if_index, 1, 0, 0);
1860 if (sm->endpoint_dependent)
1861 vnet_feature_enable_disable ("ip4-local",
1862 "nat44-ed-hairpinning",
1863 sw_if_index, 1, 0, 0);
1864 else if (!sm->deterministic)
1865 vnet_feature_enable_disable ("ip4-local",
1866 "nat44-hairpinning",
1867 sw_if_index, 1, 0, 0);
1872 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1873 sw_if_index, 0, 0, 0);
1874 pool_put (sm->interfaces, i);
1877 if (sm->endpoint_dependent)
1878 vnet_feature_enable_disable ("ip4-local",
1879 "nat44-ed-hairpinning",
1880 sw_if_index, 0, 0, 0);
1881 else if (!sm->deterministic)
1882 vnet_feature_enable_disable ("ip4-local",
1883 "nat44-hairpinning",
1884 sw_if_index, 0, 0, 0);
1890 if ((nat_interface_is_inside(i) && is_inside) ||
1891 (nat_interface_is_outside(i) && !is_inside))
1894 if (sm->num_workers > 1 && !sm->deterministic)
1896 del_feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1897 "nat44-out2in-worker-handoff";
1898 feature_name = "nat44-handoff-classify";
1900 else if (sm->deterministic)
1902 del_feature_name = !is_inside ? "nat44-det-in2out" :
1904 feature_name = "nat44-det-classify";
1906 else if (sm->endpoint_dependent)
1908 del_feature_name = !is_inside ? "nat44-ed-in2out" :
1910 feature_name = "nat44-ed-classify";
1914 del_feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1915 feature_name = "nat44-classify";
1918 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1919 sw_if_index, 0, 0, 0);
1920 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1921 sw_if_index, 1, 0, 0);
1924 if (sm->endpoint_dependent)
1925 vnet_feature_enable_disable ("ip4-local", "nat44-ed-hairpinning",
1926 sw_if_index, 0, 0, 0);
1927 else if (!sm->deterministic)
1928 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1929 sw_if_index, 0, 0, 0);
1940 return VNET_API_ERROR_NO_SUCH_ENTRY;
1942 pool_get (sm->interfaces, i);
1943 i->sw_if_index = sw_if_index;
1945 vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0,
1948 if (is_inside && !sm->out2in_dpo)
1950 if (sm->endpoint_dependent)
1951 vnet_feature_enable_disable ("ip4-local", "nat44-ed-hairpinning",
1952 sw_if_index, 1, 0, 0);
1953 else if (!sm->deterministic)
1954 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
1955 sw_if_index, 1, 0, 0);
1961 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
1965 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
1967 /* Add/delete external addresses to FIB */
1970 vec_foreach (ap, sm->addresses)
1971 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
1973 pool_foreach (m, sm->static_mappings,
1975 if (!(is_addr_only_static_mapping(m)) || (m->local_addr.as_u32 == m->external_addr.as_u32))
1978 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
1981 pool_foreach (dm, sm->det_maps,
1983 snat_add_del_addr_to_fib(&dm->out_addr, dm->out_plen, sw_if_index, !is_del);
1991 snat_interface_add_del_output_feature (u32 sw_if_index,
1992 u8 is_inside, int is_del)
1994 snat_main_t *sm = &snat_main;
1995 snat_interface_t *i;
1997 snat_static_mapping_t *m;
1998 nat_outside_fib_t *outside_fib;
1999 u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
2003 if (sm->deterministic ||
2004 (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)))
2005 return VNET_API_ERROR_UNSUPPORTED;
2008 pool_foreach (i, sm->interfaces,
2010 if (i->sw_if_index == sw_if_index)
2011 return VNET_API_ERROR_VALUE_EXIST;
2018 vec_foreach (outside_fib, sm->outside_fibs)
2020 if (outside_fib->fib_index == fib_index)
2024 outside_fib->refcount--;
2025 if (!outside_fib->refcount)
2026 vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs);
2029 outside_fib->refcount++;
2036 vec_add2 (sm->outside_fibs, outside_fib, 1);
2037 outside_fib->refcount = 1;
2038 outside_fib->fib_index = fib_index;
2045 if (sm->endpoint_dependent)
2047 vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-hairpin-dst",
2048 sw_if_index, !is_del, 0, 0);
2049 vnet_feature_enable_disable ("ip4-output", "nat44-ed-hairpin-src",
2050 sw_if_index, !is_del, 0, 0);
2054 vnet_feature_enable_disable ("ip4-unicast", "nat44-hairpin-dst",
2055 sw_if_index, !is_del, 0, 0);
2056 vnet_feature_enable_disable ("ip4-output", "nat44-hairpin-src",
2057 sw_if_index, !is_del, 0, 0);
2062 if (sm->num_workers > 1)
2064 vnet_feature_enable_disable ("ip4-unicast",
2065 "nat44-out2in-worker-handoff",
2066 sw_if_index, !is_del, 0, 0);
2067 vnet_feature_enable_disable ("ip4-output",
2068 "nat44-in2out-output-worker-handoff",
2069 sw_if_index, !is_del, 0, 0);
2073 if (sm->endpoint_dependent)
2075 vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-out2in",
2076 sw_if_index, !is_del, 0, 0);
2077 vnet_feature_enable_disable ("ip4-output", "nat44-ed-in2out-output",
2078 sw_if_index, !is_del, 0, 0);
2082 vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in",
2083 sw_if_index, !is_del, 0, 0);
2084 vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output",
2085 sw_if_index, !is_del, 0, 0);
2090 if (sm->fq_in2out_output_index == ~0 && sm->num_workers > 1)
2091 sm->fq_in2out_output_index =
2092 vlib_frame_queue_main_init (sm->in2out_output_node_index, 0);
2094 if (sm->fq_out2in_index == ~0 && sm->num_workers > 1)
2095 sm->fq_out2in_index =
2096 vlib_frame_queue_main_init (sm->out2in_node_index, 0);
2099 pool_foreach (i, sm->output_feature_interfaces,
2101 if (i->sw_if_index == sw_if_index)
2104 pool_put (sm->output_feature_interfaces, i);
2106 return VNET_API_ERROR_VALUE_EXIST;
2114 return VNET_API_ERROR_NO_SUCH_ENTRY;
2116 pool_get (sm->output_feature_interfaces, i);
2117 i->sw_if_index = sw_if_index;
2120 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
2122 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
2124 /* Add/delete external addresses to FIB */
2130 vec_foreach (ap, sm->addresses)
2131 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
2133 pool_foreach (m, sm->static_mappings,
2135 if (!((is_addr_only_static_mapping(m))) || (m->local_addr.as_u32 == m->external_addr.as_u32))
2138 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
2146 snat_set_workers (uword * bitmap)
2148 snat_main_t *sm = &snat_main;
2151 if (sm->num_workers < 2)
2152 return VNET_API_ERROR_FEATURE_DISABLED;
2154 if (clib_bitmap_last_set (bitmap) >= sm->num_workers)
2155 return VNET_API_ERROR_INVALID_WORKER;
2157 vec_free (sm->workers);
2159 clib_bitmap_foreach (i, bitmap,
2161 vec_add1(sm->workers, i);
2162 sm->per_thread_data[sm->first_worker_index + i].snat_thread_index = j;
2167 sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers);
2168 sm->num_snat_thread = _vec_len (sm->workers);
2174 snat_update_outside_fib (u32 sw_if_index, u32 new_fib_index,
2177 snat_main_t *sm = &snat_main;
2178 nat_outside_fib_t *outside_fib;
2179 snat_interface_t *i;
2183 if (new_fib_index == old_fib_index)
2186 if (!vec_len (sm->outside_fibs))
2190 pool_foreach (i, sm->interfaces,
2192 if (i->sw_if_index == sw_if_index)
2194 if (!(nat_interface_is_outside (i)))
2204 vec_foreach (outside_fib, sm->outside_fibs)
2206 if (outside_fib->fib_index == old_fib_index)
2208 outside_fib->refcount--;
2209 if (!outside_fib->refcount)
2210 vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs);
2215 vec_foreach (outside_fib, sm->outside_fibs)
2217 if (outside_fib->fib_index == new_fib_index)
2219 outside_fib->refcount++;
2227 vec_add2 (sm->outside_fibs, outside_fib, 1);
2228 outside_fib->refcount = 1;
2229 outside_fib->fib_index = new_fib_index;
2234 snat_ip4_table_bind (ip4_main_t * im,
2236 u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
2238 snat_update_outside_fib (sw_if_index, new_fib_index, old_fib_index);
2242 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
2245 ip4_address_t * address,
2247 u32 if_address_index, u32 is_delete);
2250 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
2253 ip4_address_t * address,
2255 u32 if_address_index, u32 is_delete);
2258 nat_alloc_addr_and_port_default (snat_address_t * addresses,
2261 snat_session_key_t * k,
2262 u16 port_per_thread, u32 snat_thread_index);
2264 static clib_error_t *
2265 snat_init (vlib_main_t * vm)
2267 snat_main_t *sm = &snat_main;
2268 clib_error_t *error = 0;
2269 ip4_main_t *im = &ip4_main;
2270 ip_lookup_main_t *lm = &im->lookup_main;
2272 vlib_thread_registration_t *tr;
2273 vlib_thread_main_t *tm = vlib_get_thread_main ();
2276 ip4_add_del_interface_address_callback_t cb4;
2280 sm->vnet_main = vnet_get_main ();
2282 sm->ip4_lookup_main = lm;
2283 sm->api_main = &api_main;
2284 sm->first_worker_index = 0;
2285 sm->num_workers = 0;
2286 sm->num_snat_thread = 1;
2288 sm->port_per_thread = 0xffff - 1024;
2289 sm->fq_in2out_index = ~0;
2290 sm->fq_in2out_output_index = ~0;
2291 sm->fq_out2in_index = ~0;
2292 sm->udp_timeout = SNAT_UDP_TIMEOUT;
2293 sm->tcp_established_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
2294 sm->tcp_transitory_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
2295 sm->icmp_timeout = SNAT_ICMP_TIMEOUT;
2296 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;
2297 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_DEFAULT;
2298 sm->forwarding_enabled = 0;
2299 sm->log_class = vlib_log_register_class ("nat", 0);
2300 sm->log_level = SNAT_LOG_NONE;
2301 sm->mss_clamping = 0;
2303 node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
2304 sm->error_node_index = node->index;
2306 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out");
2307 sm->in2out_node_index = node->index;
2308 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-output");
2309 sm->in2out_output_node_index = node->index;
2310 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-fast");
2311 sm->in2out_fast_node_index = node->index;
2312 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-slowpath");
2313 sm->in2out_slowpath_node_index = node->index;
2314 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-output-slowpath");
2315 sm->in2out_slowpath_output_node_index = node->index;
2316 node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-reass");
2317 sm->in2out_reass_node_index = node->index;
2319 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out");
2320 sm->ed_in2out_node_index = node->index;
2321 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out-slowpath");
2322 sm->ed_in2out_slowpath_node_index = node->index;
2323 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out-reass");
2324 sm->ed_in2out_reass_node_index = node->index;
2326 node = vlib_get_node_by_name (vm, (u8 *) "nat44-out2in");
2327 sm->out2in_node_index = node->index;
2328 node = vlib_get_node_by_name (vm, (u8 *) "nat44-out2in-fast");
2329 sm->out2in_fast_node_index = node->index;
2330 node = vlib_get_node_by_name (vm, (u8 *) "nat44-out2in-reass");
2331 sm->out2in_reass_node_index = node->index;
2333 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in");
2334 sm->ed_out2in_node_index = node->index;
2335 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in-slowpath");
2336 sm->ed_out2in_slowpath_node_index = node->index;
2337 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in-reass");
2338 sm->ed_out2in_reass_node_index = node->index;
2340 node = vlib_get_node_by_name (vm, (u8 *) "nat44-det-in2out");
2341 sm->det_in2out_node_index = node->index;
2342 node = vlib_get_node_by_name (vm, (u8 *) "nat44-det-out2in");
2343 sm->det_out2in_node_index = node->index;
2345 node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpinning");
2346 sm->hairpinning_node_index = node->index;
2347 node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpin-dst");
2348 sm->hairpin_dst_node_index = node->index;
2349 node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpin-src");
2350 sm->hairpin_src_node_index = node->index;
2351 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-hairpinning");
2352 sm->ed_hairpinning_node_index = node->index;
2353 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-hairpin-dst");
2354 sm->ed_hairpin_dst_node_index = node->index;
2355 node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-hairpin-src");
2356 sm->ed_hairpin_src_node_index = node->index;
2358 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
2361 tr = (vlib_thread_registration_t *) p[0];
2364 sm->num_workers = tr->count;
2365 sm->first_worker_index = tr->first_index;
2369 vec_validate (sm->per_thread_data, tm->n_vlib_mains - 1);
2371 /* Use all available workers by default */
2372 if (sm->num_workers > 1)
2374 for (i = 0; i < sm->num_workers; i++)
2375 bitmap = clib_bitmap_set (bitmap, i, 1);
2376 snat_set_workers (bitmap);
2377 clib_bitmap_free (bitmap);
2381 sm->per_thread_data[0].snat_thread_index = 0;
2384 error = snat_api_init (vm, sm);
2388 /* Set up the interface address add/del callback */
2389 cb4.function = snat_ip4_add_del_interface_address_cb;
2390 cb4.function_opaque = 0;
2392 vec_add1 (im->add_del_interface_address_callbacks, cb4);
2394 cb4.function = nat_ip4_add_del_addr_only_sm_cb;
2395 cb4.function_opaque = 0;
2397 vec_add1 (im->add_del_interface_address_callbacks, cb4);
2399 nat_dpo_module_init ();
2402 sm->total_users.name = "total-users";
2403 sm->total_users.stat_segment_name = "/nat44/total-users";
2404 vlib_validate_simple_counter (&sm->total_users, 0);
2405 vlib_zero_simple_counter (&sm->total_users, 0);
2406 sm->total_sessions.name = "total-sessions";
2407 sm->total_sessions.stat_segment_name = "/nat44/total-sessions";
2408 vlib_validate_simple_counter (&sm->total_sessions, 0);
2409 vlib_zero_simple_counter (&sm->total_sessions, 0);
2411 /* Init IPFIX logging */
2412 snat_ipfix_logging_init (vm);
2415 error = nat64_init (vm);
2423 ip4_table_bind_callback_t cbt4 = {
2424 .function = snat_ip4_table_bind,
2426 vec_add1 (ip4_main.table_bind_callbacks, cbt4);
2428 /* Init virtual fragmenentation reassembly */
2429 return nat_reass_init (vm);
2432 VLIB_INIT_FUNCTION (snat_init);
2435 snat_free_outside_address_and_port (snat_address_t * addresses,
2436 u32 thread_index, snat_session_key_t * k)
2440 u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
2442 for (address_index = 0; address_index < vec_len (addresses);
2445 if (addresses[address_index].addr.as_u32 == k->addr.as_u32)
2449 ASSERT (address_index < vec_len (addresses));
2451 a = addresses + address_index;
2453 switch (k->protocol)
2455 #define _(N, i, n, s) \
2456 case SNAT_PROTOCOL_##N: \
2457 ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
2458 port_host_byte_order) == 1); \
2459 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
2460 port_host_byte_order, 0); \
2461 a->busy_##n##_ports--; \
2462 a->busy_##n##_ports_per_thread[thread_index]--; \
2464 foreach_snat_protocol
2467 nat_elog_info ("unknown protocol");
2473 nat_set_outside_address_and_port (snat_address_t * addresses,
2474 u32 thread_index, snat_session_key_t * k)
2476 snat_address_t *a = 0;
2478 u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
2480 for (address_index = 0; address_index < vec_len (addresses);
2483 if (addresses[address_index].addr.as_u32 != k->addr.as_u32)
2486 a = addresses + address_index;
2487 switch (k->protocol)
2489 #define _(N, j, n, s) \
2490 case SNAT_PROTOCOL_##N: \
2491 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, port_host_byte_order)) \
2492 return VNET_API_ERROR_INSTANCE_IN_USE; \
2493 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, port_host_byte_order, 1); \
2494 a->busy_##n##_ports_per_thread[thread_index]++; \
2495 a->busy_##n##_ports++; \
2497 foreach_snat_protocol
2500 nat_elog_info ("unknown protocol");
2505 return VNET_API_ERROR_NO_SUCH_ENTRY;
2509 snat_static_mapping_match (snat_main_t * sm,
2510 snat_session_key_t match,
2511 snat_session_key_t * mapping,
2514 twice_nat_type_t * twice_nat,
2515 lb_nat_type_t * lb, ip4_address_t * ext_host_addr,
2516 u8 * is_identity_nat)
2518 clib_bihash_kv_8_8_t kv, value;
2519 snat_static_mapping_t *m;
2520 snat_session_key_t m_key;
2521 clib_bihash_8_8_t *mapping_hash = &sm->static_mapping_by_local;
2522 u32 rand, lo = 0, hi, mid, *tmp = 0, i;
2524 nat44_lb_addr_port_t *local;
2526 m_key.fib_index = match.fib_index;
2529 mapping_hash = &sm->static_mapping_by_external;
2530 m_key.fib_index = 0;
2533 m_key.addr = match.addr;
2534 m_key.port = clib_net_to_host_u16 (match.port);
2535 m_key.protocol = match.protocol;
2537 kv.key = m_key.as_u64;
2539 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2541 /* Try address only mapping */
2544 kv.key = m_key.as_u64;
2545 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2549 m = pool_elt_at_index (sm->static_mappings, value.value);
2553 if (is_lb_static_mapping (m))
2555 if (PREDICT_FALSE (lb != 0))
2556 *lb = m->affinity ? AFFINITY_LB_NAT : LB_NAT;
2557 if (m->affinity && !nat_affinity_find_and_lock (ext_host_addr[0],
2563 local = pool_elt_at_index (m->locals, backend_index);
2564 mapping->addr = local->addr;
2565 mapping->port = clib_host_to_net_u16 (local->port);
2566 mapping->fib_index = local->fib_index;
2569 // pick locals matching this worker
2570 if (PREDICT_FALSE (sm->num_workers > 1))
2572 u32 thread_index = vlib_get_thread_index ();
2574 pool_foreach_index (i, m->locals,
2576 local = pool_elt_at_index (m->locals, i);
2579 .src_address = local->addr,
2582 if (sm->worker_in2out_cb (&ip, m->fib_index) ==
2589 ASSERT (vec_len (tmp) != 0);
2594 pool_foreach_index (i, m->locals,
2600 hi = vec_len (tmp) - 1;
2601 local = pool_elt_at_index (m->locals, tmp[hi]);
2602 rand = 1 + (random_u32 (&sm->random_seed) % local->prefix);
2605 mid = ((hi - lo) >> 1) + lo;
2606 local = pool_elt_at_index (m->locals, tmp[mid]);
2607 (rand > local->prefix) ? (lo = mid + 1) : (hi = mid);
2609 local = pool_elt_at_index (m->locals, tmp[lo]);
2610 if (!(local->prefix >= rand))
2612 mapping->addr = local->addr;
2613 mapping->port = clib_host_to_net_u16 (local->port);
2614 mapping->fib_index = local->fib_index;
2617 if (nat_affinity_create_and_lock (ext_host_addr[0], match.addr,
2618 match.protocol, match.port,
2619 tmp[lo], m->affinity,
2620 m->affinity_per_service_list_head_index))
2621 nat_elog_info ("create affinity record failed");
2627 if (PREDICT_FALSE (lb != 0))
2629 mapping->fib_index = m->fib_index;
2630 mapping->addr = m->local_addr;
2631 /* Address only mapping doesn't change port */
2632 mapping->port = is_addr_only_static_mapping (m) ? match.port
2633 : clib_host_to_net_u16 (m->local_port);
2635 mapping->protocol = m->proto;
2639 mapping->addr = m->external_addr;
2640 /* Address only mapping doesn't change port */
2641 mapping->port = is_addr_only_static_mapping (m) ? match.port
2642 : clib_host_to_net_u16 (m->external_port);
2643 mapping->fib_index = sm->outside_fib_index;
2647 if (PREDICT_FALSE (is_addr_only != 0))
2648 *is_addr_only = is_addr_only_static_mapping (m);
2650 if (PREDICT_FALSE (twice_nat != 0))
2651 *twice_nat = m->twice_nat;
2653 if (PREDICT_FALSE (is_identity_nat != 0))
2654 *is_identity_nat = is_identity_static_mapping (m);
2659 static_always_inline u16
2660 snat_random_port (u16 min, u16 max)
2662 snat_main_t *sm = &snat_main;
2663 return min + random_u32 (&sm->random_seed) /
2664 (random_u32_max () / (max - min + 1) + 1);
2668 snat_alloc_outside_address_and_port (snat_address_t * addresses,
2671 snat_session_key_t * k,
2672 u16 port_per_thread,
2673 u32 snat_thread_index)
2675 snat_main_t *sm = &snat_main;
2677 return sm->alloc_addr_and_port (addresses, fib_index, thread_index, k,
2678 port_per_thread, snat_thread_index);
2682 nat_alloc_addr_and_port_default (snat_address_t * addresses,
2685 snat_session_key_t * k,
2686 u16 port_per_thread, u32 snat_thread_index)
2689 snat_address_t *a, *ga = 0;
2692 for (i = 0; i < vec_len (addresses); i++)
2695 switch (k->protocol)
2697 #define _(N, j, n, s) \
2698 case SNAT_PROTOCOL_##N: \
2699 if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
2701 if (a->fib_index == fib_index) \
2705 portnum = (port_per_thread * \
2706 snat_thread_index) + \
2707 snat_random_port(1, port_per_thread) + 1024; \
2708 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2710 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2711 a->busy_##n##_ports_per_thread[thread_index]++; \
2712 a->busy_##n##_ports++; \
2713 k->addr = a->addr; \
2714 k->port = clib_host_to_net_u16(portnum); \
2718 else if (a->fib_index == ~0) \
2724 foreach_snat_protocol
2727 nat_elog_info ("unknown protocol");
2736 switch (k->protocol)
2738 #define _(N, j, n, s) \
2739 case SNAT_PROTOCOL_##N: \
2742 portnum = (port_per_thread * \
2743 snat_thread_index) + \
2744 snat_random_port(1, port_per_thread) + 1024; \
2745 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2747 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2748 a->busy_##n##_ports_per_thread[thread_index]++; \
2749 a->busy_##n##_ports++; \
2750 k->addr = a->addr; \
2751 k->port = clib_host_to_net_u16(portnum); \
2755 foreach_snat_protocol
2758 nat_elog_info ("unknown protocol");
2763 /* Totally out of translations to use... */
2764 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
2769 nat_alloc_addr_and_port_mape (snat_address_t * addresses,
2772 snat_session_key_t * k,
2773 u16 port_per_thread, u32 snat_thread_index)
2775 snat_main_t *sm = &snat_main;
2776 snat_address_t *a = addresses;
2777 u16 m, ports, portnum, A, j;
2778 m = 16 - (sm->psid_offset + sm->psid_length);
2779 ports = (1 << (16 - sm->psid_length)) - (1 << m);
2781 if (!vec_len (addresses))
2784 switch (k->protocol)
2786 #define _(N, i, n, s) \
2787 case SNAT_PROTOCOL_##N: \
2788 if (a->busy_##n##_ports < ports) \
2792 A = snat_random_port(1, pow2_mask(sm->psid_offset)); \
2793 j = snat_random_port(0, pow2_mask(m)); \
2794 portnum = A | (sm->psid << sm->psid_offset) | (j << (16 - m)); \
2795 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2797 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2798 a->busy_##n##_ports++; \
2799 k->addr = a->addr; \
2800 k->port = clib_host_to_net_u16 (portnum); \
2805 foreach_snat_protocol
2808 nat_elog_info ("unknown protocol");
2813 /* Totally out of translations to use... */
2814 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
2819 nat_alloc_addr_and_port_range (snat_address_t * addresses,
2822 snat_session_key_t * k,
2823 u16 port_per_thread, u32 snat_thread_index)
2825 snat_main_t *sm = &snat_main;
2826 snat_address_t *a = addresses;
2829 ports = sm->end_port - sm->start_port + 1;
2831 if (!vec_len (addresses))
2834 switch (k->protocol)
2836 #define _(N, i, n, s) \
2837 case SNAT_PROTOCOL_##N: \
2838 if (a->busy_##n##_ports < ports) \
2842 portnum = snat_random_port(sm->start_port, sm->end_port); \
2843 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2845 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2846 a->busy_##n##_ports++; \
2847 k->addr = a->addr; \
2848 k->port = clib_host_to_net_u16 (portnum); \
2853 foreach_snat_protocol
2856 nat_elog_info ("unknown protocol");
2861 /* Totally out of translations to use... */
2862 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
2867 nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add)
2869 dpo_id_t dpo_v4 = DPO_INVALID;
2870 fib_prefix_t pfx = {
2871 .fp_proto = FIB_PROTOCOL_IP4,
2873 .fp_addr.ip4.as_u32 = addr.as_u32,
2878 nat_dpo_create (DPO_PROTO_IP4, 0, &dpo_v4);
2879 fib_table_entry_special_dpo_add (0, &pfx, FIB_SOURCE_PLUGIN_HI,
2880 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4);
2881 dpo_reset (&dpo_v4);
2885 fib_table_entry_special_remove (0, &pfx, FIB_SOURCE_PLUGIN_HI);
2890 format_session_kvp (u8 * s, va_list * args)
2892 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2893 snat_session_key_t k;
2897 s = format (s, "%U session-index %llu", format_snat_key, &k, v->value);
2903 format_static_mapping_kvp (u8 * s, va_list * args)
2905 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2906 snat_session_key_t k;
2910 s = format (s, "%U static-mapping-index %llu",
2911 format_static_mapping_key, &k, v->value);
2917 format_user_kvp (u8 * s, va_list * args)
2919 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2924 s = format (s, "%U fib %d user-index %llu", format_ip4_address, &k.addr,
2925 k.fib_index, v->value);
2931 format_ed_session_kvp (u8 * s, va_list * args)
2933 clib_bihash_kv_16_8_t *v = va_arg (*args, clib_bihash_kv_16_8_t *);
2936 k.as_u64[0] = v->key[0];
2937 k.as_u64[1] = v->key[1];
2940 format (s, "local %U:%d remote %U:%d proto %U fib %d session-index %llu",
2941 format_ip4_address, &k.l_addr, clib_net_to_host_u16 (k.l_port),
2942 format_ip4_address, &k.r_addr, clib_net_to_host_u16 (k.r_port),
2943 format_ip_protocol, k.proto, k.fib_index, v->value);
2949 snat_get_worker_in2out_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2951 snat_main_t *sm = &snat_main;
2952 u32 next_worker_index = 0;
2955 next_worker_index = sm->first_worker_index;
2956 hash = ip0->src_address.as_u32 + (ip0->src_address.as_u32 >> 8) +
2957 (ip0->src_address.as_u32 >> 16) + (ip0->src_address.as_u32 >> 24);
2959 if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
2960 next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
2962 next_worker_index += sm->workers[hash % _vec_len (sm->workers)];
2964 return next_worker_index;
2968 snat_get_worker_out2in_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2970 snat_main_t *sm = &snat_main;
2973 snat_session_key_t m_key;
2974 clib_bihash_kv_8_8_t kv, value;
2975 snat_static_mapping_t *m;
2977 u32 next_worker_index = 0;
2979 /* first try static mappings without port */
2980 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2982 m_key.addr = ip0->dst_address;
2985 m_key.fib_index = rx_fib_index0;
2986 kv.key = m_key.as_u64;
2987 if (!clib_bihash_search_8_8
2988 (&sm->static_mapping_by_external, &kv, &value))
2990 m = pool_elt_at_index (sm->static_mappings, value.value);
2991 return m->workers[0];
2995 proto = ip_proto_to_snat_proto (ip0->protocol);
2996 udp = ip4_next_header (ip0);
2997 port = udp->dst_port;
2999 if (PREDICT_FALSE (ip4_is_fragment (ip0)))
3001 if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
3002 return vlib_get_thread_index ();
3004 nat_reass_ip4_t *reass;
3005 reass = nat_ip4_reass_find (ip0->src_address, ip0->dst_address,
3006 ip0->fragment_id, ip0->protocol);
3008 if (reass && (reass->thread_index != (u32) ~ 0))
3009 return reass->thread_index;
3011 if (ip4_is_first_fragment (ip0))
3014 nat_ip4_reass_create (ip0->src_address, ip0->dst_address,
3015 ip0->fragment_id, ip0->protocol);
3019 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3021 m_key.addr = ip0->dst_address;
3022 m_key.port = clib_net_to_host_u16 (port);
3023 m_key.protocol = proto;
3024 m_key.fib_index = rx_fib_index0;
3025 kv.key = m_key.as_u64;
3026 if (!clib_bihash_search_8_8
3027 (&sm->static_mapping_by_external, &kv, &value))
3029 m = pool_elt_at_index (sm->static_mappings, value.value);
3030 reass->thread_index = m->workers[0];
3031 return reass->thread_index;
3034 reass->thread_index = sm->first_worker_index;
3035 reass->thread_index +=
3036 sm->workers[(clib_net_to_host_u16 (port) - 1024) /
3037 sm->port_per_thread];
3038 return reass->thread_index;
3041 return vlib_get_thread_index ();
3045 /* unknown protocol */
3046 if (PREDICT_FALSE (proto == ~0))
3048 /* use current thread */
3049 return vlib_get_thread_index ();
3052 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_ICMP))
3054 icmp46_header_t *icmp = (icmp46_header_t *) udp;
3055 icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
3056 if (!icmp_is_error_message (icmp))
3057 port = echo->identifier;
3060 ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
3061 proto = ip_proto_to_snat_proto (inner_ip->protocol);
3062 void *l4_header = ip4_next_header (inner_ip);
3065 case SNAT_PROTOCOL_ICMP:
3066 icmp = (icmp46_header_t *) l4_header;
3067 echo = (icmp_echo_header_t *) (icmp + 1);
3068 port = echo->identifier;
3070 case SNAT_PROTOCOL_UDP:
3071 case SNAT_PROTOCOL_TCP:
3072 port = ((tcp_udp_header_t *) l4_header)->src_port;
3075 return vlib_get_thread_index ();
3080 /* try static mappings with port */
3081 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3083 m_key.addr = ip0->dst_address;
3084 m_key.port = clib_net_to_host_u16 (port);
3085 m_key.protocol = proto;
3086 m_key.fib_index = rx_fib_index0;
3087 kv.key = m_key.as_u64;
3088 if (!clib_bihash_search_8_8
3089 (&sm->static_mapping_by_external, &kv, &value))
3091 m = pool_elt_at_index (sm->static_mappings, value.value);
3092 return m->workers[0];
3096 /* worker by outside port */
3097 next_worker_index = sm->first_worker_index;
3098 next_worker_index +=
3099 sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread];
3100 return next_worker_index;
3104 nat44_ed_get_worker_out2in_cb (ip4_header_t * ip, u32 rx_fib_index)
3106 snat_main_t *sm = &snat_main;
3107 clib_bihash_kv_8_8_t kv, value;
3108 u32 proto, next_worker_index = 0;
3111 snat_static_mapping_t *m;
3114 /* first try static mappings without port */
3115 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3117 make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
3118 if (!clib_bihash_search_8_8
3119 (&sm->static_mapping_by_external, &kv, &value))
3121 m = pool_elt_at_index (sm->static_mappings, value.value);
3122 return m->workers[0];
3126 proto = ip_proto_to_snat_proto (ip->protocol);
3128 /* unknown protocol */
3129 if (PREDICT_FALSE (proto == ~0))
3131 /* use current thread */
3132 return vlib_get_thread_index ();
3135 udp = ip4_next_header (ip);
3136 port = udp->dst_port;
3138 if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP))
3140 icmp46_header_t *icmp = (icmp46_header_t *) udp;
3141 icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
3142 if (!icmp_is_error_message (icmp))
3143 port = echo->identifier;
3146 ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
3147 proto = ip_proto_to_snat_proto (inner_ip->protocol);
3148 void *l4_header = ip4_next_header (inner_ip);
3151 case SNAT_PROTOCOL_ICMP:
3152 icmp = (icmp46_header_t *) l4_header;
3153 echo = (icmp_echo_header_t *) (icmp + 1);
3154 port = echo->identifier;
3156 case SNAT_PROTOCOL_UDP:
3157 case SNAT_PROTOCOL_TCP:
3158 port = ((tcp_udp_header_t *) l4_header)->src_port;
3161 return vlib_get_thread_index ();
3166 /* try static mappings with port */
3167 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3169 make_sm_kv (&kv, &ip->dst_address, proto, 0,
3170 clib_net_to_host_u16 (port));
3171 if (!clib_bihash_search_8_8
3172 (&sm->static_mapping_by_external, &kv, &value))
3174 m = pool_elt_at_index (sm->static_mappings, value.value);
3175 if (!is_lb_static_mapping (m))
3176 return m->workers[0];
3178 hash = ip->src_address.as_u32 + (ip->src_address.as_u32 >> 8) +
3179 (ip->src_address.as_u32 >> 16) + (ip->src_address.as_u32 >> 24);
3181 if (PREDICT_TRUE (is_pow2 (_vec_len (m->workers))))
3182 return m->workers[hash & (_vec_len (m->workers) - 1)];
3184 return m->workers[hash % _vec_len (m->workers)];
3188 /* worker by outside port */
3189 next_worker_index = sm->first_worker_index;
3190 next_worker_index +=
3191 sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread];
3193 return next_worker_index;
3197 nat_ha_sadd_cb (ip4_address_t * in_addr, u16 in_port,
3198 ip4_address_t * out_addr, u16 out_port,
3199 ip4_address_t * eh_addr, u16 eh_port,
3200 ip4_address_t * ehn_addr, u16 ehn_port, u8 proto,
3201 u32 fib_index, u16 flags, u32 thread_index)
3203 snat_main_t *sm = &snat_main;
3204 snat_session_key_t key;
3207 clib_bihash_kv_8_8_t kv;
3208 f64 now = vlib_time_now (sm->vlib_main);
3209 nat_outside_fib_t *outside_fib;
3210 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
3211 snat_main_per_thread_data_t *tsm;
3212 fib_prefix_t pfx = {
3213 .fp_proto = FIB_PROTOCOL_IP4,
3216 .ip4.as_u32 = eh_addr->as_u32,
3220 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3222 key.addr.as_u32 = out_addr->as_u32;
3223 key.port = out_port;
3224 key.protocol = proto;
3226 if (!(flags & SNAT_SESSION_FLAG_STATIC_MAPPING))
3228 if (nat_set_outside_address_and_port
3229 (sm->addresses, thread_index, &key))
3233 u = nat_user_get_or_create (sm, in_addr, fib_index, thread_index);
3237 s = nat_session_alloc_or_recycle (sm, u, thread_index, now);
3241 s->last_heard = now;
3243 s->ext_host_addr.as_u32 = eh_addr->as_u32;
3244 s->ext_host_port = eh_port;
3245 user_session_increment (sm, u, snat_is_session_static (s));
3246 switch (vec_len (sm->outside_fibs))
3249 key.fib_index = sm->outside_fib_index;
3252 key.fib_index = sm->outside_fibs[0].fib_index;
3256 vec_foreach (outside_fib, sm->outside_fibs)
3258 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
3259 if (FIB_NODE_INDEX_INVALID != fei)
3261 if (fib_entry_get_resolving_interface (fei) != ~0)
3263 key.fib_index = outside_fib->fib_index;
3272 kv.key = key.as_u64;
3273 kv.value = s - tsm->sessions;
3274 if (clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 1))
3275 nat_elog_warn ("out2in key add failed");
3277 key.addr.as_u32 = in_addr->as_u32;
3279 key.fib_index = fib_index;
3281 kv.key = key.as_u64;
3282 if (clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 1))
3283 nat_elog_warn ("in2out key add failed");
3287 nat_ha_sdel_cb (ip4_address_t * out_addr, u16 out_port,
3288 ip4_address_t * eh_addr, u16 eh_port, u8 proto, u32 fib_index,
3291 snat_main_t *sm = &snat_main;
3292 snat_session_key_t key;
3293 clib_bihash_kv_8_8_t kv, value;
3296 snat_main_per_thread_data_t *tsm;
3298 if (sm->num_workers > 1)
3300 sm->first_worker_index +
3301 (sm->workers[(clib_net_to_host_u16 (out_port) -
3302 1024) / sm->port_per_thread]);
3304 thread_index = sm->num_workers;
3305 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3307 key.addr.as_u32 = out_addr->as_u32;
3308 key.port = out_port;
3309 key.protocol = proto;
3310 key.fib_index = fib_index;
3311 kv.key = key.as_u64;
3312 if (clib_bihash_search_8_8 (&tsm->out2in, &kv, &value))
3315 s = pool_elt_at_index (tsm->sessions, value.value);
3316 nat_free_session_data (sm, s, thread_index, 1);
3317 nat44_delete_session (sm, s, thread_index);
3321 nat_ha_sref_cb (ip4_address_t * out_addr, u16 out_port,
3322 ip4_address_t * eh_addr, u16 eh_port, u8 proto, u32 fib_index,
3323 u32 total_pkts, u64 total_bytes, u32 thread_index)
3325 snat_main_t *sm = &snat_main;
3326 snat_session_key_t key;
3327 clib_bihash_kv_8_8_t kv, value;
3329 snat_main_per_thread_data_t *tsm;
3331 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3333 key.addr.as_u32 = out_addr->as_u32;
3334 key.port = out_port;
3335 key.protocol = proto;
3336 key.fib_index = fib_index;
3337 kv.key = key.as_u64;
3338 if (clib_bihash_search_8_8 (&tsm->out2in, &kv, &value))
3341 s = pool_elt_at_index (tsm->sessions, value.value);
3342 s->total_pkts = total_pkts;
3343 s->total_bytes = total_bytes;
3347 nat_ha_sadd_ed_cb (ip4_address_t * in_addr, u16 in_port,
3348 ip4_address_t * out_addr, u16 out_port,
3349 ip4_address_t * eh_addr, u16 eh_port,
3350 ip4_address_t * ehn_addr, u16 ehn_port, u8 proto,
3351 u32 fib_index, u16 flags, u32 thread_index)
3353 snat_main_t *sm = &snat_main;
3354 snat_session_key_t key;
3357 clib_bihash_kv_16_8_t kv;
3358 f64 now = vlib_time_now (sm->vlib_main);
3359 nat_outside_fib_t *outside_fib;
3360 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
3361 snat_main_per_thread_data_t *tsm;
3362 fib_prefix_t pfx = {
3363 .fp_proto = FIB_PROTOCOL_IP4,
3366 .ip4.as_u32 = eh_addr->as_u32,
3370 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3372 key.addr.as_u32 = out_addr->as_u32;
3373 key.port = out_port;
3374 key.protocol = proto;
3376 if (!(flags & SNAT_SESSION_FLAG_STATIC_MAPPING))
3378 if (nat_set_outside_address_and_port
3379 (sm->addresses, thread_index, &key))
3383 key.addr.as_u32 = ehn_addr->as_u32;
3384 key.port = ehn_port;
3385 if (flags & SNAT_SESSION_FLAG_TWICE_NAT)
3387 if (nat_set_outside_address_and_port
3388 (sm->twice_nat_addresses, thread_index, &key))
3392 u = nat_user_get_or_create (sm, in_addr, fib_index, thread_index);
3396 s = nat_ed_session_alloc (sm, u, thread_index, now);
3400 s->last_heard = now;
3402 s->ext_host_nat_addr.as_u32 = s->ext_host_addr.as_u32 = eh_addr->as_u32;
3403 s->ext_host_nat_port = s->ext_host_port = eh_port;
3404 if (is_twice_nat_session (s))
3406 s->ext_host_nat_addr.as_u32 = ehn_addr->as_u32;
3407 s->ext_host_nat_port = ehn_port;
3409 user_session_increment (sm, u, snat_is_session_static (s));
3410 switch (vec_len (sm->outside_fibs))
3413 key.fib_index = sm->outside_fib_index;
3416 key.fib_index = sm->outside_fibs[0].fib_index;
3420 vec_foreach (outside_fib, sm->outside_fibs)
3422 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
3423 if (FIB_NODE_INDEX_INVALID != fei)
3425 if (fib_entry_get_resolving_interface (fei) != ~0)
3427 key.fib_index = outside_fib->fib_index;
3435 key.addr.as_u32 = out_addr->as_u32;
3436 key.port = out_port;
3438 kv.value = s - tsm->sessions;
3440 key.addr.as_u32 = in_addr->as_u32;
3442 key.fib_index = fib_index;
3445 make_ed_kv (&kv, in_addr, &s->ext_host_nat_addr,
3446 snat_proto_to_ip_proto (proto), fib_index, in_port,
3447 s->ext_host_nat_port);
3448 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1))
3449 nat_elog_warn ("in2out key add failed");
3451 make_ed_kv (&kv, out_addr, eh_addr, snat_proto_to_ip_proto (proto),
3452 s->out2in.fib_index, out_port, eh_port);
3453 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 1))
3454 nat_elog_warn ("out2in key add failed");
3458 nat_ha_sdel_ed_cb (ip4_address_t * out_addr, u16 out_port,
3459 ip4_address_t * eh_addr, u16 eh_port, u8 proto,
3460 u32 fib_index, u32 ti)
3462 snat_main_t *sm = &snat_main;
3463 nat_ed_ses_key_t key;
3464 clib_bihash_kv_16_8_t kv, value;
3467 snat_main_per_thread_data_t *tsm;
3469 if (sm->num_workers > 1)
3471 sm->first_worker_index +
3472 (sm->workers[(clib_net_to_host_u16 (out_port) -
3473 1024) / sm->port_per_thread]);
3475 thread_index = sm->num_workers;
3476 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3478 key.l_addr.as_u32 = out_addr->as_u32;
3479 key.l_port = out_port;
3480 key.r_addr.as_u32 = eh_addr->as_u32;
3481 key.r_port = eh_port;
3483 key.fib_index = fib_index;
3484 kv.key[0] = key.as_u64[0];
3485 kv.key[1] = key.as_u64[1];
3486 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
3489 s = pool_elt_at_index (tsm->sessions, value.value);
3490 nat_free_session_data (sm, s, thread_index, 1);
3491 nat44_delete_session (sm, s, thread_index);
3495 nat_ha_sref_ed_cb (ip4_address_t * out_addr, u16 out_port,
3496 ip4_address_t * eh_addr, u16 eh_port, u8 proto,
3497 u32 fib_index, u32 total_pkts, u64 total_bytes,
3500 snat_main_t *sm = &snat_main;
3501 nat_ed_ses_key_t key;
3502 clib_bihash_kv_16_8_t kv, value;
3504 snat_main_per_thread_data_t *tsm;
3506 tsm = vec_elt_at_index (sm->per_thread_data, thread_index);
3508 key.l_addr.as_u32 = out_addr->as_u32;
3509 key.l_port = out_port;
3510 key.r_addr.as_u32 = eh_addr->as_u32;
3511 key.r_port = eh_port;
3513 key.fib_index = fib_index;
3514 kv.key[0] = key.as_u64[0];
3515 kv.key[1] = key.as_u64[1];
3516 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
3519 s = pool_elt_at_index (tsm->sessions, value.value);
3520 s->total_pkts = total_pkts;
3521 s->total_bytes = total_bytes;
3524 static clib_error_t *
3525 snat_config (vlib_main_t * vm, unformat_input_t * input)
3527 snat_main_t *sm = &snat_main;
3528 nat66_main_t *nm = &nat66_main;
3529 u32 translation_buckets = 1024;
3530 u32 translation_memory_size = 128 << 20;
3531 u32 user_buckets = 128;
3532 u32 user_memory_size = 64 << 20;
3533 u32 max_translations_per_user = 100;
3534 u32 outside_vrf_id = 0;
3535 u32 outside_ip6_vrf_id = 0;
3536 u32 inside_vrf_id = 0;
3537 u32 static_mapping_buckets = 1024;
3538 u32 static_mapping_memory_size = 64 << 20;
3539 u32 nat64_bib_buckets = 1024;
3540 u32 nat64_bib_memory_size = 128 << 20;
3541 u32 nat64_st_buckets = 2048;
3542 u32 nat64_st_memory_size = 256 << 20;
3543 u8 static_mapping_only = 0;
3544 u8 static_mapping_connection_tracking = 0;
3545 snat_main_per_thread_data_t *tsm;
3546 dslite_main_t *dm = &dslite_main;
3548 sm->deterministic = 0;
3550 sm->endpoint_dependent = 0;
3552 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3555 (input, "translation hash buckets %d", &translation_buckets))
3557 else if (unformat (input, "translation hash memory %d",
3558 &translation_memory_size));
3559 else if (unformat (input, "user hash buckets %d", &user_buckets))
3561 else if (unformat (input, "user hash memory %d", &user_memory_size))
3563 else if (unformat (input, "max translations per user %d",
3564 &max_translations_per_user))
3566 else if (unformat (input, "outside VRF id %d", &outside_vrf_id))
3568 else if (unformat (input, "outside ip6 VRF id %d", &outside_ip6_vrf_id))
3570 else if (unformat (input, "inside VRF id %d", &inside_vrf_id))
3572 else if (unformat (input, "static mapping only"))
3574 static_mapping_only = 1;
3575 if (unformat (input, "connection tracking"))
3576 static_mapping_connection_tracking = 1;
3578 else if (unformat (input, "deterministic"))
3579 sm->deterministic = 1;
3580 else if (unformat (input, "nat64 bib hash buckets %d",
3581 &nat64_bib_buckets))
3583 else if (unformat (input, "nat64 bib hash memory %d",
3584 &nat64_bib_memory_size))
3587 if (unformat (input, "nat64 st hash buckets %d", &nat64_st_buckets))
3589 else if (unformat (input, "nat64 st hash memory %d",
3590 &nat64_st_memory_size))
3592 else if (unformat (input, "out2in dpo"))
3594 else if (unformat (input, "dslite ce"))
3595 dslite_set_ce (dm, 1);
3596 else if (unformat (input, "endpoint-dependent"))
3597 sm->endpoint_dependent = 1;
3599 return clib_error_return (0, "unknown input '%U'",
3600 format_unformat_error, input);
3603 if (sm->deterministic && sm->endpoint_dependent)
3604 return clib_error_return (0,
3605 "deterministic and endpoint-dependent modes are mutually exclusive");
3607 if (static_mapping_only && (sm->deterministic || sm->endpoint_dependent))
3608 return clib_error_return (0,
3609 "static mapping only mode available only for simple nat");
3611 if (sm->out2in_dpo && (sm->deterministic || sm->endpoint_dependent))
3612 return clib_error_return (0,
3613 "out2in dpo mode available only for simple nat");
3615 /* for show commands, etc. */
3616 sm->translation_buckets = translation_buckets;
3617 sm->translation_memory_size = translation_memory_size;
3618 /* do not exceed load factor 10 */
3619 sm->max_translations = 10 * translation_buckets;
3620 sm->user_buckets = user_buckets;
3621 sm->user_memory_size = user_memory_size;
3622 sm->max_translations_per_user = max_translations_per_user;
3623 sm->outside_vrf_id = outside_vrf_id;
3624 sm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
3626 FIB_SOURCE_PLUGIN_HI);
3627 nm->outside_vrf_id = outside_ip6_vrf_id;
3628 nm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
3630 FIB_SOURCE_PLUGIN_HI);
3631 sm->inside_vrf_id = inside_vrf_id;
3632 sm->inside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
3634 FIB_SOURCE_PLUGIN_HI);
3635 sm->static_mapping_only = static_mapping_only;
3636 sm->static_mapping_connection_tracking = static_mapping_connection_tracking;
3638 nat64_set_hash (nat64_bib_buckets, nat64_bib_memory_size, nat64_st_buckets,
3639 nat64_st_memory_size);
3641 if (sm->deterministic)
3643 sm->in2out_node_index = snat_det_in2out_node.index;
3644 sm->in2out_output_node_index = ~0;
3645 sm->out2in_node_index = snat_det_out2in_node.index;
3646 sm->icmp_match_in2out_cb = icmp_match_in2out_det;
3647 sm->icmp_match_out2in_cb = icmp_match_out2in_det;
3651 if (sm->endpoint_dependent)
3653 sm->worker_in2out_cb = snat_get_worker_in2out_cb;
3654 sm->worker_out2in_cb = nat44_ed_get_worker_out2in_cb;
3655 sm->in2out_node_index = nat44_ed_in2out_node.index;
3656 sm->in2out_output_node_index = nat44_ed_in2out_output_node.index;
3657 sm->out2in_node_index = nat44_ed_out2in_node.index;
3658 sm->icmp_match_in2out_cb = icmp_match_in2out_ed;
3659 sm->icmp_match_out2in_cb = icmp_match_out2in_ed;
3660 nat_affinity_init (vm);
3661 nat_ha_init (vm, nat_ha_sadd_ed_cb, nat_ha_sdel_ed_cb,
3666 sm->worker_in2out_cb = snat_get_worker_in2out_cb;
3667 sm->worker_out2in_cb = snat_get_worker_out2in_cb;
3668 sm->in2out_node_index = snat_in2out_node.index;
3669 sm->in2out_output_node_index = snat_in2out_output_node.index;
3670 sm->out2in_node_index = snat_out2in_node.index;
3671 sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
3672 sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
3673 nat_ha_init (vm, nat_ha_sadd_cb, nat_ha_sdel_cb, nat_ha_sref_cb);
3675 if (!static_mapping_only ||
3676 (static_mapping_only && static_mapping_connection_tracking))
3679 vec_foreach (tsm, sm->per_thread_data)
3681 if (sm->endpoint_dependent)
3683 clib_bihash_init_16_8 (&tsm->in2out_ed, "in2out-ed",
3684 translation_buckets,
3685 translation_memory_size);
3686 clib_bihash_set_kvp_format_fn_16_8 (&tsm->in2out_ed,
3687 format_ed_session_kvp);
3689 clib_bihash_init_16_8 (&tsm->out2in_ed, "out2in-ed",
3690 translation_buckets,
3691 translation_memory_size);
3692 clib_bihash_set_kvp_format_fn_16_8 (&tsm->out2in_ed,
3693 format_ed_session_kvp);
3697 clib_bihash_init_8_8 (&tsm->in2out, "in2out",
3698 translation_buckets,
3699 translation_memory_size);
3700 clib_bihash_set_kvp_format_fn_8_8 (&tsm->in2out,
3701 format_session_kvp);
3703 clib_bihash_init_8_8 (&tsm->out2in, "out2in",
3704 translation_buckets,
3705 translation_memory_size);
3706 clib_bihash_set_kvp_format_fn_8_8 (&tsm->out2in,
3707 format_session_kvp);
3710 clib_bihash_init_8_8 (&tsm->user_hash, "users", user_buckets,
3712 clib_bihash_set_kvp_format_fn_8_8 (&tsm->user_hash,
3720 sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
3721 sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
3723 clib_bihash_init_8_8 (&sm->static_mapping_by_local,
3724 "static_mapping_by_local", static_mapping_buckets,
3725 static_mapping_memory_size);
3726 clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_local,
3727 format_static_mapping_kvp);
3729 clib_bihash_init_8_8 (&sm->static_mapping_by_external,
3730 "static_mapping_by_external",
3731 static_mapping_buckets,
3732 static_mapping_memory_size);
3733 clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_external,
3734 format_static_mapping_kvp);
3740 VLIB_CONFIG_FUNCTION (snat_config, "nat");
3743 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
3746 ip4_address_t * address,
3748 u32 if_address_index, u32 is_delete)
3750 snat_main_t *sm = &snat_main;
3751 snat_static_map_resolve_t *rp;
3752 snat_static_mapping_t *m;
3753 snat_session_key_t m_key;
3754 clib_bihash_kv_8_8_t kv, value;
3756 ip4_address_t l_addr;
3758 for (i = 0; i < vec_len (sm->to_resolve); i++)
3760 rp = sm->to_resolve + i;
3761 if (rp->addr_only == 0)
3763 if (rp->sw_if_index == sw_if_index)
3770 m_key.addr.as_u32 = address->as_u32;
3771 m_key.port = rp->addr_only ? 0 : rp->e_port;
3772 m_key.protocol = rp->addr_only ? 0 : rp->proto;
3773 m_key.fib_index = sm->outside_fib_index;
3774 kv.key = m_key.as_u64;
3775 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
3778 m = pool_elt_at_index (sm->static_mappings, value.value);
3782 /* Don't trip over lease renewal, static config */
3792 /* Indetity mapping? */
3793 if (rp->l_addr.as_u32 == 0)
3794 l_addr.as_u32 = address[0].as_u32;
3796 l_addr.as_u32 = rp->l_addr.as_u32;
3797 /* Add the static mapping */
3798 rv = snat_add_static_mapping (l_addr,
3803 rp->addr_only, ~0 /* sw_if_index */ ,
3804 rp->proto, !is_delete, rp->twice_nat,
3805 rp->out2in_only, rp->tag, rp->identity_nat);
3807 nat_elog_notice_X1 ("snat_add_static_mapping returned %d", "i4", rv);
3811 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
3814 ip4_address_t * address,
3816 u32 if_address_index, u32 is_delete)
3818 snat_main_t *sm = &snat_main;
3819 snat_static_map_resolve_t *rp;
3820 ip4_address_t l_addr;
3824 snat_address_t *addresses = sm->addresses;
3826 for (i = 0; i < vec_len (sm->auto_add_sw_if_indices); i++)
3828 if (sw_if_index == sm->auto_add_sw_if_indices[i])
3832 for (i = 0; i < vec_len (sm->auto_add_sw_if_indices_twice_nat); i++)
3835 addresses = sm->twice_nat_addresses;
3836 if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i])
3845 /* Don't trip over lease renewal, static config */
3846 for (j = 0; j < vec_len (addresses); j++)
3847 if (addresses[j].addr.as_u32 == address->as_u32)
3850 (void) snat_add_address (sm, address, ~0, twice_nat);
3851 /* Scan static map resolution vector */
3852 for (j = 0; j < vec_len (sm->to_resolve); j++)
3854 rp = sm->to_resolve + j;
3857 /* On this interface? */
3858 if (rp->sw_if_index == sw_if_index)
3860 /* Indetity mapping? */
3861 if (rp->l_addr.as_u32 == 0)
3862 l_addr.as_u32 = address[0].as_u32;
3864 l_addr.as_u32 = rp->l_addr.as_u32;
3865 /* Add the static mapping */
3866 rv = snat_add_static_mapping (l_addr,
3872 ~0 /* sw_if_index */ ,
3874 rp->is_add, rp->twice_nat,
3875 rp->out2in_only, rp->tag,
3878 nat_elog_notice_X1 ("snat_add_static_mapping returned %d",
3886 (void) snat_del_address (sm, address[0], 1, twice_nat);
3893 snat_add_interface_address (snat_main_t * sm, u32 sw_if_index, int is_del,
3896 ip4_main_t *ip4_main = sm->ip4_main;
3897 ip4_address_t *first_int_addr;
3898 snat_static_map_resolve_t *rp;
3899 u32 *indices_to_delete = 0;
3901 u32 *auto_add_sw_if_indices =
3903 auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices;
3905 first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0 /* just want the address */
3908 for (i = 0; i < vec_len (auto_add_sw_if_indices); i++)
3910 if (auto_add_sw_if_indices[i] == sw_if_index)
3914 /* if have address remove it */
3916 (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat);
3919 for (j = 0; j < vec_len (sm->to_resolve); j++)
3921 rp = sm->to_resolve + j;
3922 if (rp->sw_if_index == sw_if_index)
3923 vec_add1 (indices_to_delete, j);
3925 if (vec_len (indices_to_delete))
3927 for (j = vec_len (indices_to_delete) - 1; j >= 0; j--)
3928 vec_del1 (sm->to_resolve, j);
3929 vec_free (indices_to_delete);
3933 vec_del1 (sm->auto_add_sw_if_indices_twice_nat, i);
3935 vec_del1 (sm->auto_add_sw_if_indices, i);
3938 return VNET_API_ERROR_VALUE_EXIST;
3945 return VNET_API_ERROR_NO_SUCH_ENTRY;
3947 /* add to the auto-address list */
3949 vec_add1 (sm->auto_add_sw_if_indices_twice_nat, sw_if_index);
3951 vec_add1 (sm->auto_add_sw_if_indices, sw_if_index);
3953 /* If the address is already bound - or static - add it now */
3955 (void) snat_add_address (sm, first_int_addr, ~0, twice_nat);
3961 nat44_del_session (snat_main_t * sm, ip4_address_t * addr, u16 port,
3962 snat_protocol_t proto, u32 vrf_id, int is_in)
3964 snat_main_per_thread_data_t *tsm;
3965 clib_bihash_kv_8_8_t kv, value;
3967 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3968 snat_session_key_t key;
3970 clib_bihash_8_8_t *t;
3972 if (sm->endpoint_dependent)
3973 return VNET_API_ERROR_UNSUPPORTED;
3975 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3976 if (sm->num_workers > 1)
3978 vec_elt_at_index (sm->per_thread_data,
3979 sm->worker_in2out_cb (&ip, fib_index));
3981 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
3983 key.addr.as_u32 = addr->as_u32;
3984 key.port = clib_host_to_net_u16 (port);
3985 key.protocol = proto;
3986 key.fib_index = fib_index;
3987 kv.key = key.as_u64;
3988 t = is_in ? &tsm->in2out : &tsm->out2in;
3989 if (!clib_bihash_search_8_8 (t, &kv, &value))
3991 if (pool_is_free_index (tsm->sessions, value.value))
3992 return VNET_API_ERROR_UNSPECIFIED;
3994 s = pool_elt_at_index (tsm->sessions, value.value);
3995 nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
3996 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
4000 return VNET_API_ERROR_NO_SUCH_ENTRY;
4004 nat44_del_ed_session (snat_main_t * sm, ip4_address_t * addr, u16 port,
4005 ip4_address_t * eh_addr, u16 eh_port, u8 proto,
4006 u32 vrf_id, int is_in)
4009 clib_bihash_16_8_t *t;
4010 nat_ed_ses_key_t key;
4011 clib_bihash_kv_16_8_t kv, value;
4012 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
4014 snat_main_per_thread_data_t *tsm;
4016 if (!sm->endpoint_dependent)
4017 return VNET_API_ERROR_FEATURE_DISABLED;
4019 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
4020 if (sm->num_workers > 1)
4022 vec_elt_at_index (sm->per_thread_data,
4023 sm->worker_in2out_cb (&ip, fib_index));
4025 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
4027 t = is_in ? &tsm->in2out_ed : &tsm->out2in_ed;
4028 key.l_addr.as_u32 = addr->as_u32;
4029 key.r_addr.as_u32 = eh_addr->as_u32;
4030 key.l_port = clib_host_to_net_u16 (port);
4031 key.r_port = clib_host_to_net_u16 (eh_port);
4033 key.fib_index = fib_index;
4034 kv.key[0] = key.as_u64[0];
4035 kv.key[1] = key.as_u64[1];
4036 if (clib_bihash_search_16_8 (t, &kv, &value))
4037 return VNET_API_ERROR_NO_SUCH_ENTRY;
4039 if (pool_is_free_index (tsm->sessions, value.value))
4040 return VNET_API_ERROR_UNSPECIFIED;
4041 s = pool_elt_at_index (tsm->sessions, value.value);
4042 nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
4043 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
4048 nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length)
4050 snat_main_t *sm = &snat_main;
4052 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_MAPE;
4053 sm->alloc_addr_and_port = nat_alloc_addr_and_port_mape;
4055 sm->psid_offset = psid_offset;
4056 sm->psid_length = psid_length;
4060 nat_set_alloc_addr_and_port_range (u16 start_port, u16 end_port)
4062 snat_main_t *sm = &snat_main;
4064 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_RANGE;
4065 sm->alloc_addr_and_port = nat_alloc_addr_and_port_range;
4066 sm->start_port = start_port;
4067 sm->end_port = end_port;
4071 nat_set_alloc_addr_and_port_default (void)
4073 snat_main_t *sm = &snat_main;
4075 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_DEFAULT;
4076 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;
4080 * fd.io coding-style-patch-verification: ON
4083 * eval: (c-set-style "gnu")