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 <vnet/fib/fib_table.h>
33 #include <vnet/fib/ip4_fib.h>
35 #include <vpp/app/version.h>
37 snat_main_t snat_main;
40 /* Hook up input features */
41 VNET_FEATURE_INIT (ip4_snat_in2out, static) = {
42 .arc_name = "ip4-unicast",
43 .node_name = "nat44-in2out",
44 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
46 VNET_FEATURE_INIT (ip4_snat_out2in, static) = {
47 .arc_name = "ip4-unicast",
48 .node_name = "nat44-out2in",
49 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
50 "ip4-dhcp-client-detect"),
52 VNET_FEATURE_INIT (ip4_nat_classify, static) = {
53 .arc_name = "ip4-unicast",
54 .node_name = "nat44-classify",
55 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
57 VNET_FEATURE_INIT (ip4_snat_det_in2out, static) = {
58 .arc_name = "ip4-unicast",
59 .node_name = "nat44-det-in2out",
60 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
62 VNET_FEATURE_INIT (ip4_snat_det_out2in, static) = {
63 .arc_name = "ip4-unicast",
64 .node_name = "nat44-det-out2in",
65 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
66 "ip4-dhcp-client-detect"),
68 VNET_FEATURE_INIT (ip4_nat_det_classify, static) = {
69 .arc_name = "ip4-unicast",
70 .node_name = "nat44-det-classify",
71 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
73 VNET_FEATURE_INIT (ip4_nat44_ed_in2out, static) = {
74 .arc_name = "ip4-unicast",
75 .node_name = "nat44-ed-in2out",
76 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
78 VNET_FEATURE_INIT (ip4_nat44_ed_out2in, static) = {
79 .arc_name = "ip4-unicast",
80 .node_name = "nat44-ed-out2in",
81 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
82 "ip4-dhcp-client-detect"),
84 VNET_FEATURE_INIT (ip4_nat44_ed_classify, static) = {
85 .arc_name = "ip4-unicast",
86 .node_name = "nat44-ed-classify",
87 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
89 VNET_FEATURE_INIT (ip4_snat_in2out_worker_handoff, static) = {
90 .arc_name = "ip4-unicast",
91 .node_name = "nat44-in2out-worker-handoff",
92 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
94 VNET_FEATURE_INIT (ip4_snat_out2in_worker_handoff, static) = {
95 .arc_name = "ip4-unicast",
96 .node_name = "nat44-out2in-worker-handoff",
97 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
98 "ip4-dhcp-client-detect"),
100 VNET_FEATURE_INIT (ip4_nat_handoff_classify, static) = {
101 .arc_name = "ip4-unicast",
102 .node_name = "nat44-handoff-classify",
103 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
105 VNET_FEATURE_INIT (ip4_snat_in2out_fast, static) = {
106 .arc_name = "ip4-unicast",
107 .node_name = "nat44-in2out-fast",
108 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
110 VNET_FEATURE_INIT (ip4_snat_out2in_fast, static) = {
111 .arc_name = "ip4-unicast",
112 .node_name = "nat44-out2in-fast",
113 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
114 "ip4-dhcp-client-detect"),
116 VNET_FEATURE_INIT (ip4_snat_hairpin_dst, static) = {
117 .arc_name = "ip4-unicast",
118 .node_name = "nat44-hairpin-dst",
119 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
121 VNET_FEATURE_INIT (ip4_nat44_ed_hairpin_dst, static) = {
122 .arc_name = "ip4-unicast",
123 .node_name = "nat44-ed-hairpin-dst",
124 .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
127 /* Hook up output features */
128 VNET_FEATURE_INIT (ip4_snat_in2out_output, static) = {
129 .arc_name = "ip4-output",
130 .node_name = "nat44-in2out-output",
131 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
133 VNET_FEATURE_INIT (ip4_snat_in2out_output_worker_handoff, static) = {
134 .arc_name = "ip4-output",
135 .node_name = "nat44-in2out-output-worker-handoff",
136 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
138 VNET_FEATURE_INIT (ip4_snat_hairpin_src, static) = {
139 .arc_name = "ip4-output",
140 .node_name = "nat44-hairpin-src",
141 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
143 VNET_FEATURE_INIT (ip4_nat44_ed_in2out_output, static) = {
144 .arc_name = "ip4-output",
145 .node_name = "nat44-ed-in2out-output",
146 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
148 VNET_FEATURE_INIT (ip4_nat44_ed_hairpin_src, static) = {
149 .arc_name = "ip4-output",
150 .node_name = "nat44-ed-hairpin-src",
151 .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
154 /* Hook up ip4-local features */
155 VNET_FEATURE_INIT (ip4_nat_hairpinning, static) =
157 .arc_name = "ip4-local",
158 .node_name = "nat44-hairpinning",
159 .runs_before = VNET_FEATURES("ip4-local-end-of-arc"),
161 VNET_FEATURE_INIT (ip4_nat44_ed_hairpinning, static) =
163 .arc_name = "ip4-local",
164 .node_name = "nat44-ed-hairpinning",
165 .runs_before = VNET_FEATURES("ip4-local-end-of-arc"),
170 VLIB_PLUGIN_REGISTER () = {
171 .version = VPP_BUILD_VER,
172 .description = "Network Address Translation",
176 vlib_node_registration_t nat44_classify_node;
177 vlib_node_registration_t nat44_ed_classify_node;
178 vlib_node_registration_t nat44_det_classify_node;
179 vlib_node_registration_t nat44_handoff_classify_node;
181 #define foreach_nat44_classify_error \
182 _(MAX_REASS, "Maximum reassemblies exceeded") \
183 _(MAX_FRAG, "Maximum fragments per reassembly exceeded")
186 #define _(sym,str) NAT44_CLASSIFY_ERROR_##sym,
187 foreach_nat44_classify_error
189 NAT44_CLASSIFY_N_ERROR,
190 } nat44_classify_error_t;
192 static char * nat44_classify_error_strings[] = {
193 #define _(sym,string) string,
194 foreach_nat44_classify_error
199 NAT44_CLASSIFY_NEXT_IN2OUT,
200 NAT44_CLASSIFY_NEXT_OUT2IN,
201 NAT44_CLASSIFY_NEXT_DROP,
202 NAT44_CLASSIFY_N_NEXT,
203 } nat44_classify_next_t;
206 nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index)
208 snat_session_key_t key;
209 clib_bihash_kv_8_8_t kv;
210 nat_ed_ses_key_t ed_key;
211 clib_bihash_kv_16_8_t ed_kv;
212 snat_main_per_thread_data_t *tsm =
213 vec_elt_at_index (sm->per_thread_data, thread_index);
215 if (is_fwd_bypass_session (s))
217 ed_key.l_addr = s->in2out.addr;
218 ed_key.r_addr = s->ext_host_addr;
219 ed_key.l_port = s->in2out.port;
220 ed_key.r_port = s->ext_host_port;
221 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
222 ed_key.fib_index = 0;
223 ed_kv.key[0] = ed_key.as_u64[0];
224 ed_kv.key[1] = ed_key.as_u64[1];
225 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
226 nat_log_warn ("in2out_ed key del failed");
230 /* session lookup tables */
231 if (is_ed_session (s))
233 if (is_affinity_sessions (s))
234 nat_affinity_unlock (s->ext_host_addr, s->out2in.addr,
235 s->in2out.protocol, s->out2in.port);
236 ed_key.l_addr = s->out2in.addr;
237 ed_key.r_addr = s->ext_host_addr;
238 ed_key.fib_index = s->out2in.fib_index;
239 if (snat_is_unk_proto_session (s))
241 ed_key.proto = s->in2out.port;
247 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
248 ed_key.l_port = s->out2in.port;
249 ed_key.r_port = s->ext_host_port;
251 ed_kv.key[0] = ed_key.as_u64[0];
252 ed_kv.key[1] = ed_key.as_u64[1];
253 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
254 nat_log_warn ("out2in_ed key del failed");
255 ed_key.l_addr = s->in2out.addr;
256 ed_key.fib_index = s->in2out.fib_index;
257 if (!snat_is_unk_proto_session (s))
258 ed_key.l_port = s->in2out.port;
259 if (is_twice_nat_session (s))
261 ed_key.r_addr = s->ext_host_nat_addr;
262 ed_key.r_port = s->ext_host_nat_port;
264 ed_kv.key[0] = ed_key.as_u64[0];
265 ed_kv.key[1] = ed_key.as_u64[1];
266 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
267 nat_log_warn ("in2out_ed key del failed");
271 kv.key = s->in2out.as_u64;
272 if (clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 0))
273 nat_log_warn ("in2out key del failed");
274 kv.key = s->out2in.as_u64;
275 if (clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 0))
276 nat_log_warn ("out2in key del failed");
279 if (snat_is_unk_proto_session (s))
283 snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
284 s->out2in.addr.as_u32,
288 s->in2out.fib_index);
290 /* Twice NAT address and port for external host */
291 if (is_twice_nat_session (s))
293 key.protocol = s->in2out.protocol;
294 key.port = s->ext_host_nat_port;
295 key.addr.as_u32 = s->ext_host_nat_addr.as_u32;
296 snat_free_outside_address_and_port (sm->twice_nat_addresses,
300 if (snat_is_session_static (s))
303 if (s->outside_address_index != ~0)
304 snat_free_outside_address_and_port (sm->addresses, thread_index,
309 nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr, u32 fib_index,
313 snat_user_key_t user_key;
314 clib_bihash_kv_8_8_t kv, value;
315 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
316 dlist_elt_t * per_user_list_head_elt;
318 user_key.addr.as_u32 = addr->as_u32;
319 user_key.fib_index = fib_index;
320 kv.key = user_key.as_u64;
322 /* Ever heard of the "user" = src ip4 address before? */
323 if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
325 /* no, make a new one */
326 pool_get (tsm->users, u);
327 memset (u, 0, sizeof (*u));
328 u->addr.as_u32 = addr->as_u32;
329 u->fib_index = fib_index;
331 pool_get (tsm->list_pool, per_user_list_head_elt);
333 u->sessions_per_user_list_head_index = per_user_list_head_elt -
336 clib_dlist_init (tsm->list_pool, u->sessions_per_user_list_head_index);
338 kv.value = u - tsm->users;
341 if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1))
342 nat_log_warn ("user_hash keay add failed");
346 u = pool_elt_at_index (tsm->users, value.value);
353 nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u, u32 thread_index)
356 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
357 u32 oldest_per_user_translation_list_index, session_index;
358 dlist_elt_t * oldest_per_user_translation_list_elt;
359 dlist_elt_t * per_user_translation_list_elt;
361 /* Over quota? Recycle the least recently used translation */
362 if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
364 oldest_per_user_translation_list_index =
365 clib_dlist_remove_head (tsm->list_pool,
366 u->sessions_per_user_list_head_index);
368 ASSERT (oldest_per_user_translation_list_index != ~0);
370 /* Add it back to the end of the LRU list */
371 clib_dlist_addtail (tsm->list_pool,
372 u->sessions_per_user_list_head_index,
373 oldest_per_user_translation_list_index);
374 /* Get the list element */
375 oldest_per_user_translation_list_elt =
376 pool_elt_at_index (tsm->list_pool,
377 oldest_per_user_translation_list_index);
379 /* Get the session index from the list element */
380 session_index = oldest_per_user_translation_list_elt->value;
382 /* Get the session */
383 s = pool_elt_at_index (tsm->sessions, session_index);
384 nat_free_session_data (sm, s, thread_index);
385 if (snat_is_session_static(s))
386 u->nstaticsessions--;
389 s->outside_address_index = ~0;
394 s->ext_host_addr.as_u32 = 0;
395 s->ext_host_port = 0;
396 s->ext_host_nat_addr.as_u32 = 0;
397 s->ext_host_nat_port = 0;
401 pool_get (tsm->sessions, s);
402 memset (s, 0, sizeof (*s));
403 s->outside_address_index = ~0;
405 /* Create list elts */
406 pool_get (tsm->list_pool, per_user_translation_list_elt);
407 clib_dlist_init (tsm->list_pool,
408 per_user_translation_list_elt - tsm->list_pool);
410 per_user_translation_list_elt->value = s - tsm->sessions;
411 s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
412 s->per_user_list_head_index = u->sessions_per_user_list_head_index;
414 clib_dlist_addtail (tsm->list_pool,
415 s->per_user_list_head_index,
416 per_user_translation_list_elt - tsm->list_pool);
423 nat_ed_session_alloc (snat_main_t *sm, snat_user_t *u, u32 thread_index)
426 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
427 dlist_elt_t * per_user_translation_list_elt;
429 if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
431 nat_log_warn ("max translations per user %U", format_ip4_address, &u->addr);
432 snat_ipfix_logging_max_entries_per_user (sm->max_translations_per_user,
437 pool_get (tsm->sessions, s);
438 memset (s, 0, sizeof (*s));
439 s->outside_address_index = ~0;
441 /* Create list elts */
442 pool_get (tsm->list_pool, per_user_translation_list_elt);
443 clib_dlist_init (tsm->list_pool,
444 per_user_translation_list_elt - tsm->list_pool);
446 per_user_translation_list_elt->value = s - tsm->sessions;
447 s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
448 s->per_user_list_head_index = u->sessions_per_user_list_head_index;
450 clib_dlist_addtail (tsm->list_pool,
451 s->per_user_list_head_index,
452 per_user_translation_list_elt - tsm->list_pool);
460 } nat44_classify_trace_t;
462 static u8 * format_nat44_classify_trace (u8 * s, va_list * args)
464 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
465 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
466 nat44_classify_trace_t *t = va_arg (*args, nat44_classify_trace_t *);
470 s = format (s, "nat44-classify: fragment cached");
473 next = t->next_in2out ? "nat44-in2out" : "nat44-out2in";
474 s = format (s, "nat44-classify: next %s", next);
481 nat44_classify_node_fn_inline (vlib_main_t * vm,
482 vlib_node_runtime_t * node,
483 vlib_frame_t * frame,
486 u32 n_left_from, * from, * to_next;
487 nat44_classify_next_t next_index;
488 snat_main_t *sm = &snat_main;
489 snat_static_mapping_t *m;
490 u32 thread_index = vm->thread_index;
491 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
492 u32 *fragments_to_drop = 0;
493 u32 *fragments_to_loopback = 0;
495 from = vlib_frame_vector_args (frame);
496 n_left_from = frame->n_vectors;
497 next_index = node->cached_next_index;
499 while (n_left_from > 0)
503 vlib_get_next_frame (vm, node, next_index,
504 to_next, n_left_to_next);
506 while (n_left_from > 0 && n_left_to_next > 0)
510 u32 next0 = NAT44_CLASSIFY_NEXT_IN2OUT, sw_if_index0, rx_fib_index0;
513 snat_session_key_t m_key0;
514 clib_bihash_kv_8_8_t kv0, value0;
515 clib_bihash_kv_16_8_t ed_kv0, ed_value0;
517 nat_reass_ip4_t *reass0;
520 /* speculatively enqueue b0 to the current next frame */
528 b0 = vlib_get_buffer (vm, bi0);
529 ip0 = vlib_buffer_get_current (b0);
530 udp0 = ip4_next_header (ip0);
532 if (is_ed && ip0->protocol != IP_PROTOCOL_ICMP)
534 if (!ip4_is_fragment (ip0) || ip4_is_first_fragment (ip0))
536 /* process leading fragment/whole packet (with L4 header) */
537 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
539 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
541 make_ed_kv (&ed_kv0, &ip0->src_address, &ip0->dst_address,
542 ip0->protocol, rx_fib_index0, udp0->src_port,
544 if (ip4_is_fragment (ip0))
546 reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
552 if (PREDICT_FALSE (!reass0))
554 next0 = NAT44_CLASSIFY_NEXT_DROP;
555 b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
556 nat_log_notice ("maximum reassemblies exceeded");
559 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &ed_kv0,
562 /* session exists so classify as IN2OUT,
563 * save this information for future fragments and set
564 * past fragments to be looped over and reprocessed */
565 reass0->sess_index = ed_value0.value;
566 reass0->classify_next = NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT;
567 nat_ip4_reass_get_frags (reass0,
568 &fragments_to_loopback);
573 /* session doesn't exist so continue in the code,
574 * save this information for future fragments and set
575 * past fragments to be looped over and reprocessed */
576 reass0->flags |= NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE;
577 nat_ip4_reass_get_frags (reass0,
578 &fragments_to_loopback);
583 /* process whole packet */
584 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &ed_kv0,
587 /* session doesn't exist so continue in code */
592 /* process non-first fragment */
593 reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
599 if (PREDICT_FALSE (!reass0))
601 next0 = NAT44_CLASSIFY_NEXT_DROP;
602 b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
603 nat_log_notice ("maximum reassemblies exceeded");
606 /* check if first fragment has arrived */
607 if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NONE &&
608 !(reass0->flags & NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE))
610 /* first fragment still hasn't arrived, cache this fragment */
611 if (nat_ip4_reass_add_fragment (reass0, bi0,
614 b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_FRAG];
615 nat_log_notice ("maximum fragments per reassembly exceeded");
616 next0 = NAT44_CLASSIFY_NEXT_DROP;
622 if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT)
624 /* flag NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE is set
625 * so keep the default next0 and continue in code to
626 * potentially find other classification for this packet */
630 vec_foreach (ap, sm->addresses)
632 if (ip0->dst_address.as_u32 == ap->addr.as_u32)
634 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
639 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
641 m_key0.addr = ip0->dst_address;
644 m_key0.fib_index = 0;
645 kv0.key = m_key0.as_u64;
646 /* try to classify the fragment based on IP header alone */
647 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external,
650 m = pool_elt_at_index (sm->static_mappings, value0.value);
651 if (m->local_addr.as_u32 != m->external_addr.as_u32)
652 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
655 if (!ip4_is_fragment (ip0) || ip4_is_first_fragment (ip0))
657 /* process leading fragment/whole packet (with L4 header) */
658 m_key0.port = clib_net_to_host_u16 (udp0->dst_port);
659 m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
660 kv0.key = m_key0.as_u64;
661 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external,
664 m = pool_elt_at_index (sm->static_mappings, value0.value);
665 if (m->local_addr.as_u32 != m->external_addr.as_u32)
666 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
668 if (ip4_is_fragment (ip0))
670 reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
676 if (PREDICT_FALSE (!reass0))
678 next0 = NAT44_CLASSIFY_NEXT_DROP;
679 b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
680 nat_log_notice ("maximum reassemblies exceeded");
683 /* save classification for future fragments and set past
684 * fragments to be looped over and reprocessed */
685 if (next0 == NAT44_CLASSIFY_NEXT_OUT2IN)
686 reass0->classify_next = NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN;
688 reass0->classify_next = NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT;
689 nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
694 /* process non-first fragment */
695 reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
701 if (PREDICT_FALSE (!reass0))
703 next0 = NAT44_CLASSIFY_NEXT_DROP;
704 b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
705 nat_log_notice ("maximum reassemblies exceeded");
708 if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NONE)
709 /* first fragment still hasn't arrived */
711 if (nat_ip4_reass_add_fragment (reass0, bi0,
714 b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_FRAG];
715 nat_log_notice ("maximum fragments per reassembly exceeded");
716 next0 = NAT44_CLASSIFY_NEXT_DROP;
722 else if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN)
723 next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
724 else if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT)
725 next0 = NAT44_CLASSIFY_NEXT_IN2OUT;
730 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
731 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
733 nat44_classify_trace_t *t =
734 vlib_add_trace (vm, node, b0, sizeof (*t));
737 t->next_in2out = next0 == NAT44_CLASSIFY_NEXT_IN2OUT ? 1 : 0;
746 /* verify speculative enqueue, maybe switch current next frame */
747 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
748 to_next, n_left_to_next,
751 if (n_left_from == 0 && vec_len (fragments_to_loopback))
753 from = vlib_frame_vector_args (frame);
754 u32 len = vec_len (fragments_to_loopback);
755 if (len <= VLIB_FRAME_SIZE)
757 clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
759 vec_reset_length (fragments_to_loopback);
764 fragments_to_loopback + (len - VLIB_FRAME_SIZE),
765 sizeof (u32) * VLIB_FRAME_SIZE);
766 n_left_from = VLIB_FRAME_SIZE;
767 _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
772 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
775 nat_send_all_to_node (vm, fragments_to_drop, node, 0, NAT44_CLASSIFY_NEXT_DROP);
777 vec_free (fragments_to_drop);
779 return frame->n_vectors;
783 nat44_classify_node_fn (vlib_main_t * vm,
784 vlib_node_runtime_t * node,
785 vlib_frame_t * frame)
787 return nat44_classify_node_fn_inline (vm, node, frame, 0);
790 VLIB_REGISTER_NODE (nat44_classify_node) = {
791 .function = nat44_classify_node_fn,
792 .name = "nat44-classify",
793 .vector_size = sizeof (u32),
794 .format_trace = format_nat44_classify_trace,
795 .type = VLIB_NODE_TYPE_INTERNAL,
796 .n_errors = ARRAY_LEN(nat44_classify_error_strings),
797 .error_strings = nat44_classify_error_strings,
798 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
800 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out",
801 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in",
802 [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
806 VLIB_NODE_FUNCTION_MULTIARCH (nat44_classify_node,
807 nat44_classify_node_fn);
809 nat44_ed_classify_node_fn (vlib_main_t * vm,
810 vlib_node_runtime_t * node,
811 vlib_frame_t * frame)
813 return nat44_classify_node_fn_inline (vm, node, frame, 1);
816 VLIB_REGISTER_NODE (nat44_ed_classify_node) = {
817 .function = nat44_ed_classify_node_fn,
818 .name = "nat44-ed-classify",
819 .vector_size = sizeof (u32),
820 .format_trace = format_nat44_classify_trace,
821 .type = VLIB_NODE_TYPE_INTERNAL,
822 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
824 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-ed-in2out",
825 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-ed-out2in",
826 [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
830 VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_classify_node,
831 nat44_ed_classify_node_fn);
834 nat44_det_classify_node_fn (vlib_main_t * vm,
835 vlib_node_runtime_t * node,
836 vlib_frame_t * frame)
838 return nat44_classify_node_fn_inline (vm, node, frame, 0);
841 VLIB_REGISTER_NODE (nat44_det_classify_node) = {
842 .function = nat44_det_classify_node_fn,
843 .name = "nat44-det-classify",
844 .vector_size = sizeof (u32),
845 .format_trace = format_nat44_classify_trace,
846 .type = VLIB_NODE_TYPE_INTERNAL,
847 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
849 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-det-in2out",
850 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-det-out2in",
851 [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
855 VLIB_NODE_FUNCTION_MULTIARCH (nat44_det_classify_node,
856 nat44_det_classify_node_fn);
859 nat44_handoff_classify_node_fn (vlib_main_t * vm,
860 vlib_node_runtime_t * node,
861 vlib_frame_t * frame)
863 return nat44_classify_node_fn_inline (vm, node, frame, 0);
866 VLIB_REGISTER_NODE (nat44_handoff_classify_node) = {
867 .function = nat44_handoff_classify_node_fn,
868 .name = "nat44-handoff-classify",
869 .vector_size = sizeof (u32),
870 .format_trace = format_nat44_classify_trace,
871 .type = VLIB_NODE_TYPE_INTERNAL,
872 .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
874 [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out-worker-handoff",
875 [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in-worker-handoff",
876 [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
880 VLIB_NODE_FUNCTION_MULTIARCH (nat44_handoff_classify_node,
881 nat44_handoff_classify_node_fn);
884 * @brief Add/del NAT address to FIB.
886 * Add the external NAT address to the FIB as receive entries. This ensures
887 * that VPP will reply to ARP for this address and we don't need to enable
888 * proxy ARP on the outside interface.
890 * @param addr IPv4 address.
891 * @param plen address prefix length
892 * @param sw_if_index Interface.
893 * @param is_add If 0 delete, otherwise add.
896 snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index,
899 fib_prefix_t prefix = {
901 .fp_proto = FIB_PROTOCOL_IP4,
903 .ip4.as_u32 = addr->as_u32,
906 u32 fib_index = ip4_fib_table_get_index_for_sw_if_index(sw_if_index);
909 fib_table_entry_update_one_path(fib_index,
911 FIB_SOURCE_PLUGIN_LOW,
912 (FIB_ENTRY_FLAG_CONNECTED |
913 FIB_ENTRY_FLAG_LOCAL |
914 FIB_ENTRY_FLAG_EXCLUSIVE),
921 FIB_ROUTE_PATH_FLAG_NONE);
923 fib_table_entry_delete(fib_index,
925 FIB_SOURCE_PLUGIN_LOW);
928 int snat_add_address (snat_main_t *sm, ip4_address_t *addr, u32 vrf_id,
933 vlib_thread_main_t *tm = vlib_get_thread_main ();
935 if (twice_nat && !sm->endpoint_dependent)
936 return VNET_API_ERROR_FEATURE_DISABLED;
938 /* Check if address already exists */
939 vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses)
941 if (ap->addr.as_u32 == addr->as_u32)
942 return VNET_API_ERROR_VALUE_EXIST;
946 vec_add2 (sm->twice_nat_addresses, ap, 1);
948 vec_add2 (sm->addresses, ap, 1);
953 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
954 FIB_SOURCE_PLUGIN_LOW);
957 #define _(N, i, n, s) \
958 clib_bitmap_alloc (ap->busy_##n##_port_bitmap, 65535); \
959 ap->busy_##n##_ports = 0; \
960 ap->busy_##n##_ports_per_thread = 0;\
961 vec_validate_init_empty (ap->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
962 foreach_snat_protocol
968 /* Add external address to FIB */
969 pool_foreach (i, sm->interfaces,
971 if (nat_interface_is_inside(i) || sm->out2in_dpo)
974 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
977 pool_foreach (i, sm->output_feature_interfaces,
979 if (nat_interface_is_inside(i) || sm->out2in_dpo)
982 snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
989 static int is_snat_address_used_in_static_mapping (snat_main_t *sm,
992 snat_static_mapping_t *m;
993 pool_foreach (m, sm->static_mappings,
995 if (m->external_addr.as_u32 == addr.as_u32)
1002 void increment_v4_address (ip4_address_t * a)
1006 v = clib_net_to_host_u32(a->as_u32) + 1;
1007 a->as_u32 = clib_host_to_net_u32(v);
1011 snat_add_static_mapping_when_resolved (snat_main_t * sm,
1012 ip4_address_t l_addr,
1017 snat_protocol_t proto,
1022 snat_static_map_resolve_t *rp;
1024 vec_add2 (sm->to_resolve, rp, 1);
1025 rp->l_addr.as_u32 = l_addr.as_u32;
1026 rp->l_port = l_port;
1027 rp->sw_if_index = sw_if_index;
1028 rp->e_port = e_port;
1029 rp->vrf_id = vrf_id;
1031 rp->addr_only = addr_only;
1032 rp->is_add = is_add;
1033 rp->tag = vec_dup (tag);
1036 static u32 get_thread_idx_by_port(u16 e_port)
1038 snat_main_t * sm = &snat_main;
1039 u32 thread_idx = sm->num_workers;
1040 if (sm->num_workers > 1)
1042 thread_idx = sm->first_worker_index + sm->workers[(e_port - 1024) / sm->port_per_thread];
1048 * @brief Add static mapping.
1050 * Create static mapping between local addr+port and external addr+port.
1052 * @param l_addr Local IPv4 address.
1053 * @param e_addr External IPv4 address.
1054 * @param l_port Local port number.
1055 * @param e_port External port number.
1056 * @param vrf_id VRF ID.
1057 * @param addr_only If 0 address port and pair mapping, otherwise address only.
1058 * @param sw_if_index External port instead of specific IP address.
1059 * @param is_add If 0 delete static mapping, otherwise add.
1060 * @param twice_nat If value is TWICE_NAT then translate external host address
1062 * If value is TWICE_NAT_SELF then translate external host
1063 * address and port whenever external host address equals
1064 * local address of internal host.
1065 * @param out2in_only If 1 rule match only out2in direction
1066 * @param tag - opaque string tag
1070 int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr,
1071 u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
1072 u32 sw_if_index, snat_protocol_t proto, int is_add,
1073 twice_nat_type_t twice_nat, u8 out2in_only,
1076 snat_main_t * sm = &snat_main;
1077 snat_static_mapping_t *m;
1078 snat_session_key_t m_key;
1079 clib_bihash_kv_8_8_t kv, value;
1080 snat_address_t *a = 0;
1083 snat_interface_t *interface;
1085 snat_main_per_thread_data_t *tsm;
1086 snat_user_key_t u_key;
1088 dlist_elt_t * head, * elt;
1089 u32 elt_index, head_index;
1093 snat_static_map_resolve_t *rp, *rp_match = 0;
1095 if (!sm->endpoint_dependent)
1097 if (twice_nat || out2in_only)
1098 return VNET_API_ERROR_FEATURE_DISABLED;
1101 /* If the external address is a specific interface address */
1102 if (sw_if_index != ~0)
1104 ip4_address_t * first_int_addr;
1106 for (i = 0; i < vec_len (sm->to_resolve); i++)
1108 rp = sm->to_resolve + i;
1109 if (rp->sw_if_index != sw_if_index ||
1110 rp->l_addr.as_u32 != l_addr.as_u32 ||
1111 rp->vrf_id != vrf_id || rp->addr_only != addr_only)
1116 if (rp->l_port != l_port || rp->e_port != e_port || rp->proto != proto)
1124 /* Might be already set... */
1125 first_int_addr = ip4_interface_first_address
1126 (sm->ip4_main, sw_if_index, 0 /* just want the address*/);
1131 return VNET_API_ERROR_VALUE_EXIST;
1133 snat_add_static_mapping_when_resolved
1134 (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
1135 addr_only, is_add, tag);
1137 /* DHCP resolution required? */
1138 if (first_int_addr == 0)
1144 e_addr.as_u32 = first_int_addr->as_u32;
1145 /* Identity mapping? */
1146 if (l_addr.as_u32 == 0)
1147 l_addr.as_u32 = e_addr.as_u32;
1153 return VNET_API_ERROR_NO_SUCH_ENTRY;
1155 vec_del1 (sm->to_resolve, i);
1159 e_addr.as_u32 = first_int_addr->as_u32;
1160 /* Identity mapping? */
1161 if (l_addr.as_u32 == 0)
1162 l_addr.as_u32 = e_addr.as_u32;
1169 m_key.addr = e_addr;
1170 m_key.port = addr_only ? 0 : e_port;
1171 m_key.protocol = addr_only ? 0 : proto;
1172 m_key.fib_index = 0;
1173 kv.key = m_key.as_u64;
1174 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
1177 m = pool_elt_at_index (sm->static_mappings, value.value);
1182 return VNET_API_ERROR_VALUE_EXIST;
1184 if (twice_nat && addr_only)
1185 return VNET_API_ERROR_UNSUPPORTED;
1187 /* Convert VRF id to FIB index */
1190 p = hash_get (sm->ip4_main->fib_index_by_table_id, vrf_id);
1192 return VNET_API_ERROR_NO_SUCH_FIB;
1195 /* If not specified use inside VRF id from SNAT plugin startup config */
1198 fib_index = sm->inside_fib_index;
1199 vrf_id = sm->inside_vrf_id;
1204 m_key.addr = l_addr;
1205 m_key.port = addr_only ? 0 : l_port;
1206 m_key.protocol = addr_only ? 0 : proto;
1207 m_key.fib_index = fib_index;
1208 kv.key = m_key.as_u64;
1209 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
1210 return VNET_API_ERROR_VALUE_EXIST;
1213 /* Find external address in allocated addresses and reserve port for
1214 address and port pair mapping when dynamic translations enabled */
1215 if (!(addr_only || sm->static_mapping_only || out2in_only))
1217 for (i = 0; i < vec_len (sm->addresses); i++)
1219 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1221 a = sm->addresses + i;
1222 /* External port must be unused */
1225 #define _(N, j, n, s) \
1226 case SNAT_PROTOCOL_##N: \
1227 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
1228 return VNET_API_ERROR_INVALID_VALUE; \
1229 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
1230 if (e_port > 1024) \
1232 a->busy_##n##_ports++; \
1233 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \
1236 foreach_snat_protocol
1239 nat_log_info ("unknown protocol");
1240 return VNET_API_ERROR_INVALID_VALUE_2;
1245 /* External address must be allocated */
1246 if (!a && (l_addr.as_u32 != e_addr.as_u32))
1248 if (sw_if_index != ~0)
1250 for (i = 0; i < vec_len (sm->to_resolve); i++)
1252 rp = sm->to_resolve + i;
1255 if (rp->sw_if_index != sw_if_index &&
1256 rp->l_addr.as_u32 != l_addr.as_u32 &&
1257 rp->vrf_id != vrf_id && rp->l_port != l_port &&
1258 rp->e_port != e_port && rp->proto != proto)
1261 vec_del1 (sm->to_resolve, i);
1265 return VNET_API_ERROR_NO_SUCH_ENTRY;
1269 pool_get (sm->static_mappings, m);
1270 memset (m, 0, sizeof (*m));
1271 m->tag = vec_dup (tag);
1272 m->local_addr = l_addr;
1273 m->external_addr = e_addr;
1274 m->addr_only = addr_only;
1276 m->fib_index = fib_index;
1277 m->twice_nat = twice_nat;
1278 m->out2in_only = out2in_only;
1281 m->local_port = l_port;
1282 m->external_port = e_port;
1286 if (sm->num_workers > 1)
1289 .src_address = m->local_addr,
1291 vec_add1 (m->workers, sm->worker_in2out_cb (&ip, m->fib_index));
1292 tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
1295 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1297 m_key.addr = m->local_addr;
1298 m_key.port = m->local_port;
1299 m_key.protocol = m->proto;
1300 m_key.fib_index = m->fib_index;
1301 kv.key = m_key.as_u64;
1302 kv.value = m - sm->static_mappings;
1304 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
1306 m_key.addr = m->external_addr;
1307 m_key.port = m->external_port;
1308 m_key.fib_index = 0;
1309 kv.key = m_key.as_u64;
1310 kv.value = m - sm->static_mappings;
1311 clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1);
1313 /* Delete dynamic sessions matching local address (+ local port) */
1314 if (!(sm->static_mapping_only))
1316 u_key.addr = m->local_addr;
1317 u_key.fib_index = m->fib_index;
1318 kv.key = u_key.as_u64;
1319 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1321 user_index = value.value;
1322 u = pool_elt_at_index (tsm->users, user_index);
1325 head_index = u->sessions_per_user_list_head_index;
1326 head = pool_elt_at_index (tsm->list_pool, head_index);
1327 elt_index = head->next;
1328 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1329 ses_index = elt->value;
1330 while (ses_index != ~0)
1332 s = pool_elt_at_index (tsm->sessions, ses_index);
1333 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1334 ses_index = elt->value;
1336 if (snat_is_session_static (s))
1339 if (!addr_only && (clib_net_to_host_u16 (s->in2out.port) != m->local_port))
1342 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
1343 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1345 if (!addr_only && !sm->endpoint_dependent)
1356 if (sw_if_index != ~0)
1359 return VNET_API_ERROR_NO_SUCH_ENTRY;
1362 /* Free external address port */
1363 if (!(addr_only || sm->static_mapping_only || out2in_only))
1365 for (i = 0; i < vec_len (sm->addresses); i++)
1367 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1369 a = sm->addresses + i;
1372 #define _(N, j, n, s) \
1373 case SNAT_PROTOCOL_##N: \
1374 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1375 if (e_port > 1024) \
1377 a->busy_##n##_ports--; \
1378 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \
1381 foreach_snat_protocol
1384 nat_log_info ("unknown protocol");
1385 return VNET_API_ERROR_INVALID_VALUE_2;
1392 if (sm->num_workers > 1)
1393 tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
1395 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1397 m_key.addr = m->local_addr;
1398 m_key.port = m->local_port;
1399 m_key.protocol = m->proto;
1400 m_key.fib_index = m->fib_index;
1401 kv.key = m_key.as_u64;
1403 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0);
1405 m_key.addr = m->external_addr;
1406 m_key.port = m->external_port;
1407 m_key.fib_index = 0;
1408 kv.key = m_key.as_u64;
1409 clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0);
1411 /* Delete session(s) for static mapping if exist */
1412 if (!(sm->static_mapping_only) ||
1413 (sm->static_mapping_only && sm->static_mapping_connection_tracking))
1415 u_key.addr = m->local_addr;
1416 u_key.fib_index = m->fib_index;
1417 kv.key = u_key.as_u64;
1418 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1420 user_index = value.value;
1421 u = pool_elt_at_index (tsm->users, user_index);
1422 if (u->nstaticsessions)
1424 head_index = u->sessions_per_user_list_head_index;
1425 head = pool_elt_at_index (tsm->list_pool, head_index);
1426 elt_index = head->next;
1427 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1428 ses_index = elt->value;
1429 while (ses_index != ~0)
1431 s = pool_elt_at_index (tsm->sessions, ses_index);
1432 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1433 ses_index = elt->value;
1437 if ((s->out2in.addr.as_u32 != e_addr.as_u32) ||
1438 (clib_net_to_host_u16 (s->out2in.port) != e_port))
1442 if (is_lb_session (s))
1445 if (!snat_is_session_static (s))
1448 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
1449 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1451 if (!addr_only && !sm->endpoint_dependent)
1459 vec_free (m->workers);
1460 /* Delete static mapping from pool */
1461 pool_put (sm->static_mappings, m);
1464 if (!addr_only || (l_addr.as_u32 == e_addr.as_u32))
1467 /* Add/delete external address to FIB */
1468 pool_foreach (interface, sm->interfaces,
1470 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1473 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1476 pool_foreach (interface, sm->output_feature_interfaces,
1478 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1481 snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
1488 int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
1489 snat_protocol_t proto,
1490 nat44_lb_addr_port_t *locals, u8 is_add,
1491 twice_nat_type_t twice_nat, u8 out2in_only,
1492 u8 *tag, u32 affinity)
1494 snat_main_t * sm = &snat_main;
1495 snat_static_mapping_t *m;
1496 snat_session_key_t m_key;
1497 clib_bihash_kv_8_8_t kv, value;
1498 snat_address_t *a = 0;
1500 nat44_lb_addr_port_t *local;
1501 u32 elt_index, head_index, ses_index;
1502 snat_main_per_thread_data_t *tsm;
1503 snat_user_key_t u_key;
1506 dlist_elt_t * head, * elt;
1509 if (!sm->endpoint_dependent)
1510 return VNET_API_ERROR_FEATURE_DISABLED;
1512 m_key.addr = e_addr;
1513 m_key.port = e_port;
1514 m_key.protocol = proto;
1515 m_key.fib_index = 0;
1516 kv.key = m_key.as_u64;
1517 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
1520 m = pool_elt_at_index (sm->static_mappings, value.value);
1525 return VNET_API_ERROR_VALUE_EXIST;
1527 if (vec_len (locals) < 2)
1528 return VNET_API_ERROR_INVALID_VALUE;
1530 /* Find external address in allocated addresses and reserve port for
1531 address and port pair mapping when dynamic translations enabled */
1532 if (!(sm->static_mapping_only || out2in_only))
1534 for (i = 0; i < vec_len (sm->addresses); i++)
1536 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1538 a = sm->addresses + i;
1539 /* External port must be unused */
1542 #define _(N, j, n, s) \
1543 case SNAT_PROTOCOL_##N: \
1544 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
1545 return VNET_API_ERROR_INVALID_VALUE; \
1546 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
1547 if (e_port > 1024) \
1549 a->busy_##n##_ports++; \
1550 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \
1553 foreach_snat_protocol
1556 nat_log_info ("unknown protocol");
1557 return VNET_API_ERROR_INVALID_VALUE_2;
1562 /* External address must be allocated */
1564 return VNET_API_ERROR_NO_SUCH_ENTRY;
1567 pool_get (sm->static_mappings, m);
1568 memset (m, 0, sizeof (*m));
1569 m->tag = vec_dup (tag);
1570 m->external_addr = e_addr;
1572 m->external_port = e_port;
1574 m->twice_nat = twice_nat;
1575 m->out2in_only = out2in_only;
1576 m->affinity = affinity;
1579 m->affinity_per_service_list_head_index =
1580 nat_affinity_get_per_service_list_head_index();
1582 m->affinity_per_service_list_head_index = ~0;
1584 m_key.addr = m->external_addr;
1585 m_key.port = m->external_port;
1586 m_key.protocol = m->proto;
1587 m_key.fib_index = 0;
1588 kv.key = m_key.as_u64;
1589 kv.value = m - sm->static_mappings;
1590 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1))
1592 nat_log_err ("static_mapping_by_external key add failed");
1593 return VNET_API_ERROR_UNSPECIFIED;
1596 m_key.fib_index = m->fib_index;
1597 for (i = 0; i < vec_len (locals); i++)
1599 locals[i].fib_index = fib_table_find_or_create_and_lock (
1600 FIB_PROTOCOL_IP4, locals[i].vrf_id, FIB_SOURCE_PLUGIN_LOW);
1601 m_key.addr = locals[i].addr;
1602 m_key.fib_index = locals[i].fib_index;
1605 m_key.port = locals[i].port;
1606 kv.key = m_key.as_u64;
1607 kv.value = m - sm->static_mappings;
1608 clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
1610 locals[i].prefix = (i == 0) ? locals[i].probability :\
1611 (locals[i - 1].prefix + locals[i].probability);
1612 vec_add1 (m->locals, locals[i]);
1613 if (sm->num_workers > 1)
1616 .src_address = locals[i].addr,
1618 bitmap = clib_bitmap_set (
1619 bitmap, sm->worker_in2out_cb (&ip, m->fib_index), 1);
1623 /* Assign workers */
1624 if (sm->num_workers > 1)
1626 clib_bitmap_foreach (i, bitmap,
1628 vec_add1(m->workers, i);
1635 return VNET_API_ERROR_NO_SUCH_ENTRY;
1637 /* Free external address port */
1638 if (!(sm->static_mapping_only || out2in_only))
1640 for (i = 0; i < vec_len (sm->addresses); i++)
1642 if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
1644 a = sm->addresses + i;
1647 #define _(N, j, n, s) \
1648 case SNAT_PROTOCOL_##N: \
1649 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
1650 if (e_port > 1024) \
1652 a->busy_##n##_ports--; \
1653 a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \
1656 foreach_snat_protocol
1659 nat_log_info ("unknown protocol");
1660 return VNET_API_ERROR_INVALID_VALUE_2;
1667 m_key.addr = m->external_addr;
1668 m_key.port = m->external_port;
1669 m_key.protocol = m->proto;
1670 m_key.fib_index = 0;
1671 kv.key = m_key.as_u64;
1672 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0))
1674 nat_log_err ("static_mapping_by_external key del failed");
1675 return VNET_API_ERROR_UNSPECIFIED;
1678 vec_foreach (local, m->locals)
1680 fib_table_unlock (local->fib_index, FIB_PROTOCOL_IP4,
1681 FIB_SOURCE_PLUGIN_LOW);
1682 m_key.addr = local->addr;
1685 m_key.port = local->port;
1686 m_key.fib_index = local->fib_index;
1687 kv.key = m_key.as_u64;
1688 if (clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0))
1690 nat_log_err ("static_mapping_by_local key del failed");
1691 return VNET_API_ERROR_UNSPECIFIED;
1695 if (sm->num_workers > 1)
1698 .src_address = local->addr,
1700 tsm = vec_elt_at_index (sm->per_thread_data,
1701 sm->worker_in2out_cb (&ip, m->fib_index));
1704 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
1706 /* Delete sessions */
1707 u_key.addr = local->addr;
1708 u_key.fib_index = m->fib_index;
1709 kv.key = u_key.as_u64;
1710 if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
1712 u = pool_elt_at_index (tsm->users, value.value);
1713 if (u->nstaticsessions)
1715 head_index = u->sessions_per_user_list_head_index;
1716 head = pool_elt_at_index (tsm->list_pool, head_index);
1717 elt_index = head->next;
1718 elt = pool_elt_at_index (tsm->list_pool, elt_index);
1719 ses_index = elt->value;
1720 while (ses_index != ~0)
1722 s = pool_elt_at_index (tsm->sessions, ses_index);
1723 elt = pool_elt_at_index (tsm->list_pool, elt->next);
1724 ses_index = elt->value;
1726 if (!(is_lb_session (s)))
1729 if ((s->in2out.addr.as_u32 != local->addr.as_u32) ||
1730 (clib_net_to_host_u16 (s->in2out.port) != local->port))
1733 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
1734 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
1740 nat_affinity_flush_service (m->affinity_per_service_list_head_index);
1741 vec_free(m->locals);
1743 vec_free(m->workers);
1745 pool_put (sm->static_mappings, m);
1752 snat_del_address (snat_main_t *sm, ip4_address_t addr, u8 delete_sm,
1755 snat_address_t *a = 0;
1756 snat_session_t *ses;
1757 u32 *ses_to_be_removed = 0, *ses_index;
1758 snat_main_per_thread_data_t *tsm;
1759 snat_static_mapping_t *m;
1760 snat_interface_t *interface;
1762 snat_address_t *addresses = twice_nat ? sm->twice_nat_addresses : sm->addresses;
1764 /* Find SNAT address */
1765 for (i=0; i < vec_len (addresses); i++)
1767 if (addresses[i].addr.as_u32 == addr.as_u32)
1774 return VNET_API_ERROR_NO_SUCH_ENTRY;
1778 pool_foreach (m, sm->static_mappings,
1780 if (m->external_addr.as_u32 == addr.as_u32)
1781 (void) snat_add_static_mapping (m->local_addr, m->external_addr,
1782 m->local_port, m->external_port,
1783 m->vrf_id, m->addr_only, ~0,
1784 m->proto, 0, m->twice_nat,
1785 m->out2in_only, m->tag);
1790 /* Check if address is used in some static mapping */
1791 if (is_snat_address_used_in_static_mapping(sm, addr))
1793 nat_log_notice ("address used in static mapping");
1794 return VNET_API_ERROR_UNSPECIFIED;
1798 if (a->fib_index != ~0)
1799 fib_table_unlock(a->fib_index, FIB_PROTOCOL_IP4,
1800 FIB_SOURCE_PLUGIN_LOW);
1802 /* Delete sessions using address */
1803 if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports)
1805 vec_foreach (tsm, sm->per_thread_data)
1807 pool_foreach (ses, tsm->sessions, ({
1808 if (ses->out2in.addr.as_u32 == addr.as_u32)
1810 ses->outside_address_index = ~0;
1811 nat_free_session_data (sm, ses, tsm - sm->per_thread_data);
1812 vec_add1 (ses_to_be_removed, ses - tsm->sessions);
1816 vec_foreach (ses_index, ses_to_be_removed)
1818 ses = pool_elt_at_index (tsm->sessions, ses_index[0]);
1819 nat44_delete_session (sm, ses, tsm - sm->per_thread_data);
1822 vec_free (ses_to_be_removed);
1826 #define _(N, i, n, s) \
1827 clib_bitmap_free (a->busy_##n##_port_bitmap); \
1828 vec_free (a->busy_##n##_ports_per_thread);
1829 foreach_snat_protocol
1834 vec_del1 (sm->twice_nat_addresses, i);
1838 vec_del1 (sm->addresses, i);
1840 /* Delete external address from FIB */
1841 pool_foreach (interface, sm->interfaces,
1843 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1846 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1849 pool_foreach (interface, sm->output_feature_interfaces,
1851 if (nat_interface_is_inside(interface) || sm->out2in_dpo)
1854 snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
1861 int snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
1863 snat_main_t *sm = &snat_main;
1864 snat_interface_t *i;
1865 const char * feature_name, *del_feature_name;
1866 snat_address_t * ap;
1867 snat_static_mapping_t * m;
1868 snat_det_map_t * dm;
1869 nat_outside_fib_t *outside_fib;
1870 u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1873 if (sm->out2in_dpo && !is_inside)
1874 return VNET_API_ERROR_UNSUPPORTED;
1876 pool_foreach (i, sm->output_feature_interfaces,
1878 if (i->sw_if_index == sw_if_index)
1879 return VNET_API_ERROR_VALUE_EXIST;
1882 if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking))
1883 feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast";
1886 if (sm->num_workers > 1 && !sm->deterministic)
1887 feature_name = is_inside ? "nat44-in2out-worker-handoff" : "nat44-out2in-worker-handoff";
1888 else if (sm->deterministic)
1889 feature_name = is_inside ? "nat44-det-in2out" : "nat44-det-out2in";
1890 else if (sm->endpoint_dependent)
1891 feature_name = is_inside ? "nat44-ed-in2out" : "nat44-ed-out2in";
1893 feature_name = is_inside ? "nat44-in2out" : "nat44-out2in";
1896 if (sm->fq_in2out_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1897 sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index,
1900 if (sm->fq_out2in_index == ~0 && !sm->deterministic && sm->num_workers > 1)
1901 sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index,
1906 vec_foreach (outside_fib, sm->outside_fibs)
1908 if (outside_fib->fib_index == fib_index)
1912 outside_fib->refcount--;
1913 if (!outside_fib->refcount)
1914 vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs);
1917 outside_fib->refcount++;
1923 vec_add2 (sm->outside_fibs, outside_fib, 1);
1924 outside_fib->refcount = 1;
1925 outside_fib->fib_index = fib_index;
1929 pool_foreach (i, sm->interfaces,
1931 if (i->sw_if_index == sw_if_index)
1935 if (nat_interface_is_inside(i) && nat_interface_is_outside(i))
1938 i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE;
1940 i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE;
1942 if (sm->num_workers > 1 && !sm->deterministic)
1944 del_feature_name = "nat44-handoff-classify";
1945 feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
1946 "nat44-out2in-worker-handoff";
1948 else if (sm->deterministic)
1950 del_feature_name = "nat44-det-classify";
1951 feature_name = !is_inside ? "nat44-det-in2out" :
1954 else if (sm->endpoint_dependent)
1956 del_feature_name = "nat44-ed-classify";
1957 feature_name = !is_inside ? "nat44-ed-in2out" :
1962 del_feature_name = "nat44-classify";
1963 feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
1966 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
1967 sw_if_index, 0, 0, 0);
1968 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1969 sw_if_index, 1, 0, 0);
1972 if (sm->endpoint_dependent)
1973 vnet_feature_enable_disable ("ip4-local",
1974 "nat44-ed-hairpinning",
1975 sw_if_index, 1, 0, 0);
1976 else if (!sm->deterministic)
1977 vnet_feature_enable_disable ("ip4-local",
1978 "nat44-hairpinning",
1979 sw_if_index, 1, 0, 0);
1984 vnet_feature_enable_disable ("ip4-unicast", feature_name,
1985 sw_if_index, 0, 0, 0);
1986 pool_put (sm->interfaces, i);
1989 if (sm->endpoint_dependent)
1990 vnet_feature_enable_disable ("ip4-local",
1991 "nat44-ed-hairpinning",
1992 sw_if_index, 0, 0, 0);
1993 else if (!sm->deterministic)
1994 vnet_feature_enable_disable ("ip4-local",
1995 "nat44-hairpinning",
1996 sw_if_index, 0, 0, 0);
2002 if ((nat_interface_is_inside(i) && is_inside) ||
2003 (nat_interface_is_outside(i) && !is_inside))
2006 if (sm->num_workers > 1 && !sm->deterministic)
2008 del_feature_name = !is_inside ? "nat44-in2out-worker-handoff" :
2009 "nat44-out2in-worker-handoff";
2010 feature_name = "nat44-handoff-classify";
2012 else if (sm->deterministic)
2014 del_feature_name = !is_inside ? "nat44-det-in2out" :
2016 feature_name = "nat44-det-classify";
2018 else if (sm->endpoint_dependent)
2020 del_feature_name = !is_inside ? "nat44-ed-in2out" :
2022 feature_name = "nat44-ed-classify";
2026 del_feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in";
2027 feature_name = "nat44-classify";
2030 vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
2031 sw_if_index, 0, 0, 0);
2032 vnet_feature_enable_disable ("ip4-unicast", feature_name,
2033 sw_if_index, 1, 0, 0);
2036 if (sm->endpoint_dependent)
2037 vnet_feature_enable_disable ("ip4-local", "nat44-ed-hairpinning",
2038 sw_if_index, 0, 0, 0);
2039 else if (!sm->deterministic)
2040 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
2041 sw_if_index, 0, 0, 0);
2051 return VNET_API_ERROR_NO_SUCH_ENTRY;
2053 pool_get (sm->interfaces, i);
2054 i->sw_if_index = sw_if_index;
2056 vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0, 0);
2058 if (is_inside && !sm->out2in_dpo)
2060 if (sm->endpoint_dependent)
2061 vnet_feature_enable_disable ("ip4-local", "nat44-ed-hairpinning",
2062 sw_if_index, 1, 0, 0);
2063 else if (!sm->deterministic)
2064 vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
2065 sw_if_index, 1, 0, 0);
2071 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
2075 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
2077 /* Add/delete external addresses to FIB */
2079 vec_foreach (ap, sm->addresses)
2080 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
2082 pool_foreach (m, sm->static_mappings,
2084 if (!(m->addr_only) || (m->local_addr.as_u32 == m->external_addr.as_u32))
2087 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
2090 pool_foreach (dm, sm->det_maps,
2092 snat_add_del_addr_to_fib(&dm->out_addr, dm->out_plen, sw_if_index, !is_del);
2098 int snat_interface_add_del_output_feature (u32 sw_if_index,
2102 snat_main_t *sm = &snat_main;
2103 snat_interface_t *i;
2104 snat_address_t * ap;
2105 snat_static_mapping_t * m;
2107 if (sm->deterministic ||
2108 (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)))
2109 return VNET_API_ERROR_UNSUPPORTED;
2111 pool_foreach (i, sm->interfaces,
2113 if (i->sw_if_index == sw_if_index)
2114 return VNET_API_ERROR_VALUE_EXIST;
2119 if (sm->endpoint_dependent)
2121 vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-hairpin-dst",
2122 sw_if_index, !is_del, 0, 0);
2123 vnet_feature_enable_disable ("ip4-output", "nat44-ed-hairpin-src",
2124 sw_if_index, !is_del, 0, 0);
2128 vnet_feature_enable_disable ("ip4-unicast", "nat44-hairpin-dst",
2129 sw_if_index, !is_del, 0, 0);
2130 vnet_feature_enable_disable ("ip4-output", "nat44-hairpin-src",
2131 sw_if_index, !is_del, 0, 0);
2136 if (sm->num_workers > 1)
2138 vnet_feature_enable_disable ("ip4-unicast",
2139 "nat44-out2in-worker-handoff",
2140 sw_if_index, !is_del, 0, 0);
2141 vnet_feature_enable_disable ("ip4-output",
2142 "nat44-in2out-output-worker-handoff",
2143 sw_if_index, !is_del, 0, 0);
2147 if (sm->endpoint_dependent)
2149 vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-out2in",
2150 sw_if_index, !is_del, 0, 0);
2151 vnet_feature_enable_disable ("ip4-output", "nat44-ed-in2out-output",
2152 sw_if_index, !is_del, 0, 0);
2156 vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in",
2157 sw_if_index, !is_del, 0, 0);
2158 vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output",
2159 sw_if_index, !is_del, 0, 0);
2164 if (sm->fq_in2out_output_index == ~0 && sm->num_workers > 1)
2165 sm->fq_in2out_output_index =
2166 vlib_frame_queue_main_init (sm->in2out_output_node_index, 0);
2168 if (sm->fq_out2in_index == ~0 && sm->num_workers > 1)
2169 sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, 0);
2171 pool_foreach (i, sm->output_feature_interfaces,
2173 if (i->sw_if_index == sw_if_index)
2176 pool_put (sm->output_feature_interfaces, i);
2178 return VNET_API_ERROR_VALUE_EXIST;
2185 return VNET_API_ERROR_NO_SUCH_ENTRY;
2187 pool_get (sm->output_feature_interfaces, i);
2188 i->sw_if_index = sw_if_index;
2191 i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE;
2193 i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE;
2195 /* Add/delete external addresses to FIB */
2200 vec_foreach (ap, sm->addresses)
2201 snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
2203 pool_foreach (m, sm->static_mappings,
2205 if (!(m->addr_only) || (m->local_addr.as_u32 == m->external_addr.as_u32))
2208 snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
2214 int snat_set_workers (uword * bitmap)
2216 snat_main_t *sm = &snat_main;
2219 if (sm->num_workers < 2)
2220 return VNET_API_ERROR_FEATURE_DISABLED;
2222 if (clib_bitmap_last_set (bitmap) >= sm->num_workers)
2223 return VNET_API_ERROR_INVALID_WORKER;
2225 vec_free (sm->workers);
2226 clib_bitmap_foreach (i, bitmap,
2228 vec_add1(sm->workers, i);
2229 sm->per_thread_data[sm->first_worker_index + i].snat_thread_index = j;
2233 sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers);
2234 sm->num_snat_thread = _vec_len (sm->workers);
2241 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
2244 ip4_address_t * address,
2246 u32 if_address_index,
2250 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
2253 ip4_address_t * address,
2255 u32 if_address_index,
2259 nat_alloc_addr_and_port_default (snat_address_t * addresses,
2262 snat_session_key_t * k,
2263 u32 * address_indexp,
2264 u16 port_per_thread,
2265 u32 snat_thread_index);
2267 static clib_error_t * snat_init (vlib_main_t * vm)
2269 snat_main_t * sm = &snat_main;
2270 clib_error_t * error = 0;
2271 ip4_main_t * im = &ip4_main;
2272 ip_lookup_main_t * lm = &im->lookup_main;
2274 vlib_thread_registration_t *tr;
2275 vlib_thread_main_t *tm = vlib_get_thread_main ();
2278 ip4_add_del_interface_address_callback_t cb4;
2279 vlib_node_t * error_drop_node;
2282 sm->vnet_main = vnet_get_main();
2284 sm->ip4_lookup_main = lm;
2285 sm->api_main = &api_main;
2286 sm->first_worker_index = 0;
2287 sm->num_workers = 0;
2288 sm->num_snat_thread = 1;
2290 sm->port_per_thread = 0xffff - 1024;
2291 sm->fq_in2out_index = ~0;
2292 sm->fq_out2in_index = ~0;
2293 sm->udp_timeout = SNAT_UDP_TIMEOUT;
2294 sm->tcp_established_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
2295 sm->tcp_transitory_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
2296 sm->icmp_timeout = SNAT_ICMP_TIMEOUT;
2297 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;
2298 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_DEFAULT;
2299 sm->forwarding_enabled = 0;
2300 sm->log_class = vlib_log_register_class ("nat", 0);
2301 error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
2302 sm->error_node_index = error_drop_node->index;
2303 sm->mss_clamping = 0;
2305 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
2308 tr = (vlib_thread_registration_t *) p[0];
2311 sm->num_workers = tr->count;
2312 sm->first_worker_index = tr->first_index;
2316 vec_validate (sm->per_thread_data, tm->n_vlib_mains - 1);
2318 /* Use all available workers by default */
2319 if (sm->num_workers > 1)
2321 for (i=0; i < sm->num_workers; i++)
2322 bitmap = clib_bitmap_set (bitmap, i, 1);
2323 snat_set_workers(bitmap);
2324 clib_bitmap_free (bitmap);
2328 sm->per_thread_data[0].snat_thread_index = 0;
2331 error = snat_api_init(vm, sm);
2335 /* Set up the interface address add/del callback */
2336 cb4.function = snat_ip4_add_del_interface_address_cb;
2337 cb4.function_opaque = 0;
2339 vec_add1 (im->add_del_interface_address_callbacks, cb4);
2341 cb4.function = nat_ip4_add_del_addr_only_sm_cb;
2342 cb4.function_opaque = 0;
2344 vec_add1 (im->add_del_interface_address_callbacks, cb4);
2346 nat_dpo_module_init ();
2348 /* Init IPFIX logging */
2349 snat_ipfix_logging_init(vm);
2352 error = nat64_init(vm);
2360 /* Init virtual fragmenentation reassembly */
2361 return nat_reass_init(vm);
2364 VLIB_INIT_FUNCTION (snat_init);
2366 void snat_free_outside_address_and_port (snat_address_t * addresses,
2368 snat_session_key_t * k)
2372 u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
2374 for (address_index = 0; address_index < vec_len (addresses); address_index++)
2376 if (addresses[address_index].addr.as_u32 == k->addr.as_u32)
2380 ASSERT (address_index < vec_len (addresses));
2382 a = addresses + address_index;
2384 switch (k->protocol)
2386 #define _(N, i, n, s) \
2387 case SNAT_PROTOCOL_##N: \
2388 ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
2389 port_host_byte_order) == 1); \
2390 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
2391 port_host_byte_order, 0); \
2392 a->busy_##n##_ports--; \
2393 a->busy_##n##_ports_per_thread[thread_index]--; \
2395 foreach_snat_protocol
2398 nat_log_info ("unknown protocol");
2404 * @brief Match NAT44 static mapping.
2406 * @param sm NAT main.
2407 * @param match Address and port to match.
2408 * @param mapping External or local address and port of the matched mapping.
2409 * @param by_external If 0 match by local address otherwise match by external
2411 * @param is_addr_only If matched mapping is address only
2412 * @param twice_nat If matched mapping is twice NAT.
2413 * @param lb If matched mapping is load-balanced.
2415 * @returns 0 if match found otherwise 1.
2417 int snat_static_mapping_match (snat_main_t * sm,
2418 snat_session_key_t match,
2419 snat_session_key_t * mapping,
2422 twice_nat_type_t *twice_nat,
2424 ip4_address_t * ext_host_addr)
2426 clib_bihash_kv_8_8_t kv, value;
2427 snat_static_mapping_t *m;
2428 snat_session_key_t m_key;
2429 clib_bihash_8_8_t *mapping_hash = &sm->static_mapping_by_local;
2430 u32 rand, lo = 0, hi, mid;
2433 m_key.fib_index = match.fib_index;
2436 mapping_hash = &sm->static_mapping_by_external;
2437 m_key.fib_index = 0;
2440 m_key.addr = match.addr;
2441 m_key.port = clib_net_to_host_u16 (match.port);
2442 m_key.protocol = match.protocol;
2444 kv.key = m_key.as_u64;
2446 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2448 /* Try address only mapping */
2451 kv.key = m_key.as_u64;
2452 if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
2456 m = pool_elt_at_index (sm->static_mappings, value.value);
2460 if (vec_len (m->locals))
2462 if (PREDICT_FALSE(lb != 0))
2463 *lb = m->affinity ? AFFINITY_LB_NAT : LB_NAT;
2466 if (nat_affinity_find_and_lock (ext_host_addr[0], match.addr,
2467 match.protocol, match.port, &backend_index))
2470 mapping->addr = m->locals[backend_index].addr;
2471 mapping->port = clib_host_to_net_u16 (m->locals[backend_index].port);
2472 mapping->fib_index = m->locals[backend_index].fib_index;
2476 hi = vec_len (m->locals) - 1;
2477 rand = 1 + (random_u32 (&sm->random_seed) % m->locals[hi].prefix);
2480 mid = ((hi - lo) >> 1) + lo;
2481 (rand > m->locals[mid].prefix) ? (lo = mid + 1) : (hi = mid);
2483 if (!(m->locals[lo].prefix >= rand))
2485 if (PREDICT_FALSE (sm->num_workers > 1))
2488 .src_address = m->locals[lo].addr,
2490 if (sm->worker_in2out_cb (&ip, m->fib_index) != vlib_get_thread_index ())
2493 mapping->addr = m->locals[lo].addr;
2494 mapping->port = clib_host_to_net_u16 (m->locals[lo].port);
2495 mapping->fib_index = m->locals[lo].fib_index;
2498 if (nat_affinity_create_and_lock (ext_host_addr[0], match.addr,
2499 match.protocol, match.port, lo, m->affinity,
2500 m->affinity_per_service_list_head_index))
2501 nat_log_info ("create affinity record failed");
2506 if (PREDICT_FALSE(lb != 0))
2508 mapping->fib_index = m->fib_index;
2509 mapping->addr = m->local_addr;
2510 /* Address only mapping doesn't change port */
2511 mapping->port = m->addr_only ? match.port
2512 : clib_host_to_net_u16 (m->local_port);
2514 mapping->protocol = m->proto;
2518 mapping->addr = m->external_addr;
2519 /* Address only mapping doesn't change port */
2520 mapping->port = m->addr_only ? match.port
2521 : clib_host_to_net_u16 (m->external_port);
2522 mapping->fib_index = sm->outside_fib_index;
2526 if (PREDICT_FALSE(is_addr_only != 0))
2527 *is_addr_only = m->addr_only;
2529 if (PREDICT_FALSE(twice_nat != 0))
2530 *twice_nat = m->twice_nat;
2535 static_always_inline u16
2536 snat_random_port (u16 min, u16 max)
2538 snat_main_t *sm = &snat_main;
2539 return min + random_u32 (&sm->random_seed) /
2540 (random_u32_max() / (max - min + 1) + 1);
2544 snat_alloc_outside_address_and_port (snat_address_t * addresses,
2547 snat_session_key_t * k,
2548 u32 * address_indexp,
2549 u16 port_per_thread,
2550 u32 snat_thread_index)
2552 snat_main_t *sm = &snat_main;
2554 return sm->alloc_addr_and_port(addresses, fib_index, thread_index, k,
2555 address_indexp, port_per_thread,
2560 nat_alloc_addr_and_port_default (snat_address_t * addresses,
2563 snat_session_key_t * k,
2564 u32 * address_indexp,
2565 u16 port_per_thread,
2566 u32 snat_thread_index)
2569 snat_address_t *a, *ga = 0;
2572 for (i = 0; i < vec_len (addresses); i++)
2575 switch (k->protocol)
2577 #define _(N, j, n, s) \
2578 case SNAT_PROTOCOL_##N: \
2579 if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
2581 if (a->fib_index == fib_index) \
2585 portnum = (port_per_thread * \
2586 snat_thread_index) + \
2587 snat_random_port(1, port_per_thread) + 1024; \
2588 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2590 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2591 a->busy_##n##_ports_per_thread[thread_index]++; \
2592 a->busy_##n##_ports++; \
2593 k->addr = a->addr; \
2594 k->port = clib_host_to_net_u16(portnum); \
2595 *address_indexp = i; \
2599 else if (a->fib_index == ~0) \
2606 foreach_snat_protocol
2609 nat_log_info ("unknown protocol");
2618 switch (k->protocol)
2620 #define _(N, j, n, s) \
2621 case SNAT_PROTOCOL_##N: \
2624 portnum = (port_per_thread * \
2625 snat_thread_index) + \
2626 snat_random_port(1, port_per_thread) + 1024; \
2627 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2629 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2630 a->busy_##n##_ports_per_thread[thread_index]++; \
2631 a->busy_##n##_ports++; \
2632 k->addr = a->addr; \
2633 k->port = clib_host_to_net_u16(portnum); \
2634 *address_indexp = gi; \
2638 foreach_snat_protocol
2641 nat_log_info ("unknown protocol");
2646 /* Totally out of translations to use... */
2647 snat_ipfix_logging_addresses_exhausted(0);
2652 nat_alloc_addr_and_port_mape (snat_address_t * addresses,
2655 snat_session_key_t * k,
2656 u32 * address_indexp,
2657 u16 port_per_thread,
2658 u32 snat_thread_index)
2660 snat_main_t *sm = &snat_main;
2661 snat_address_t *a = addresses;
2662 u16 m, ports, portnum, A, j;
2663 m = 16 - (sm->psid_offset + sm->psid_length);
2664 ports = (1 << (16 - sm->psid_length)) - (1 << m);
2666 if (!vec_len (addresses))
2669 switch (k->protocol)
2671 #define _(N, i, n, s) \
2672 case SNAT_PROTOCOL_##N: \
2673 if (a->busy_##n##_ports < ports) \
2677 A = snat_random_port(1, pow2_mask(sm->psid_offset)); \
2678 j = snat_random_port(0, pow2_mask(m)); \
2679 portnum = A | (sm->psid << sm->psid_offset) | (j << (16 - m)); \
2680 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2682 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2683 a->busy_##n##_ports++; \
2684 k->addr = a->addr; \
2685 k->port = clib_host_to_net_u16 (portnum); \
2686 *address_indexp = i; \
2691 foreach_snat_protocol
2694 nat_log_info ("unknown protocol");
2699 /* Totally out of translations to use... */
2700 snat_ipfix_logging_addresses_exhausted(0);
2705 nat_alloc_addr_and_port_range (snat_address_t * addresses,
2708 snat_session_key_t * k,
2709 u32 * address_indexp,
2710 u16 port_per_thread,
2711 u32 snat_thread_index)
2713 snat_main_t *sm = &snat_main;
2714 snat_address_t *a = addresses;
2717 ports = sm->end_port - sm->start_port + 1;
2719 if (!vec_len (addresses))
2722 switch (k->protocol)
2724 #define _(N, i, n, s) \
2725 case SNAT_PROTOCOL_##N: \
2726 if (a->busy_##n##_ports < ports) \
2730 portnum = snat_random_port(sm->start_port, sm->end_port); \
2731 if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
2733 clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
2734 a->busy_##n##_ports++; \
2735 k->addr = a->addr; \
2736 k->port = clib_host_to_net_u16 (portnum); \
2737 *address_indexp = i; \
2742 foreach_snat_protocol
2745 nat_log_info ("unknown protocol");
2750 /* Totally out of translations to use... */
2751 snat_ipfix_logging_addresses_exhausted(0);
2756 nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add)
2758 dpo_id_t dpo_v4 = DPO_INVALID;
2759 fib_prefix_t pfx = {
2760 .fp_proto = FIB_PROTOCOL_IP4,
2762 .fp_addr.ip4.as_u32 = addr.as_u32,
2767 nat_dpo_create (DPO_PROTO_IP4, 0, &dpo_v4);
2768 fib_table_entry_special_dpo_add (0, &pfx, FIB_SOURCE_PLUGIN_HI,
2769 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4);
2770 dpo_reset (&dpo_v4);
2774 fib_table_entry_special_remove (0, &pfx, FIB_SOURCE_PLUGIN_HI);
2779 unformat_snat_protocol (unformat_input_t * input, va_list * args)
2781 u32 *r = va_arg (*args, u32 *);
2784 #define _(N, i, n, s) else if (unformat (input, s)) *r = SNAT_PROTOCOL_##N;
2785 foreach_snat_protocol
2793 format_snat_protocol (u8 * s, va_list * args)
2795 u32 i = va_arg (*args, u32);
2800 #define _(N, j, n, str) case SNAT_PROTOCOL_##N: t = (u8 *) str; break;
2801 foreach_snat_protocol
2804 s = format (s, "unknown");
2807 s = format (s, "%s", t);
2812 format_nat_addr_and_port_alloc_alg (u8 * s, va_list * args)
2814 u32 i = va_arg (*args, u32);
2819 #define _(v, N, s) case NAT_ADDR_AND_PORT_ALLOC_ALG_##N: t = (u8 *) s; break;
2820 foreach_nat_addr_and_port_alloc_alg
2823 s = format (s, "unknown");
2826 s = format (s, "%s", t);
2830 u8 * format_snat_key (u8 * s, va_list * args);
2831 u8 * format_static_mapping_key (u8 * s, va_list * args);
2834 format_session_kvp (u8 * s, va_list * args)
2836 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2837 snat_session_key_t k;
2841 s = format (s, "%U session-index %llu", format_snat_key, &k, v->value);
2847 format_static_mapping_kvp (u8 * s, va_list * args)
2849 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2850 snat_session_key_t k;
2854 s = format (s, "%U static-mapping-index %llu",
2855 format_static_mapping_key, &k, v->value);
2861 format_user_kvp (u8 * s, va_list * args)
2863 clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2868 s = format (s, "%U fib %d user-index %llu", format_ip4_address, &k.addr,
2869 k.fib_index, v->value);
2875 format_ed_session_kvp (u8 * s, va_list * args)
2877 clib_bihash_kv_16_8_t *v = va_arg (*args, clib_bihash_kv_16_8_t *);
2880 k.as_u64[0] = v->key[0];
2881 k.as_u64[1] = v->key[1];
2883 s = format (s, "local %U:%d remote %U:%d proto %U fib %d session-index %llu",
2884 format_ip4_address, &k.l_addr, clib_net_to_host_u16 (k.l_port),
2885 format_ip4_address, &k.r_addr, clib_net_to_host_u16 (k.r_port),
2886 format_ip_protocol, k.proto, k.fib_index, v->value);
2892 snat_get_worker_in2out_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2894 snat_main_t *sm = &snat_main;
2895 u32 next_worker_index = 0;
2898 next_worker_index = sm->first_worker_index;
2899 hash = ip0->src_address.as_u32 + (ip0->src_address.as_u32 >> 8) +
2900 (ip0->src_address.as_u32 >> 16) + (ip0->src_address.as_u32 >>24);
2902 if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
2903 next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
2905 next_worker_index += sm->workers[hash % _vec_len (sm->workers)];
2907 return next_worker_index;
2911 snat_get_worker_out2in_cb (ip4_header_t * ip0, u32 rx_fib_index0)
2913 snat_main_t *sm = &snat_main;
2916 snat_session_key_t m_key;
2917 clib_bihash_kv_8_8_t kv, value;
2918 snat_static_mapping_t *m;
2920 u32 next_worker_index = 0;
2922 /* first try static mappings without port */
2923 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2925 m_key.addr = ip0->dst_address;
2928 m_key.fib_index = rx_fib_index0;
2929 kv.key = m_key.as_u64;
2930 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
2932 m = pool_elt_at_index (sm->static_mappings, value.value);
2933 return m->workers[0];
2937 proto = ip_proto_to_snat_proto (ip0->protocol);
2938 udp = ip4_next_header (ip0);
2939 port = udp->dst_port;
2941 if (PREDICT_FALSE (ip4_is_fragment (ip0)))
2943 if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
2944 return vlib_get_thread_index ();
2946 if (PREDICT_TRUE (!ip4_is_first_fragment (ip0)))
2948 nat_reass_ip4_t *reass;
2950 reass = nat_ip4_reass_find (ip0->src_address, ip0->dst_address,
2951 ip0->fragment_id, ip0->protocol);
2953 if (reass && (reass->thread_index != (u32) ~ 0))
2954 return reass->thread_index;
2956 return vlib_get_thread_index ();
2960 /* unknown protocol */
2961 if (PREDICT_FALSE (proto == ~0))
2963 /* use current thread */
2964 return vlib_get_thread_index ();
2967 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_ICMP))
2969 icmp46_header_t * icmp = (icmp46_header_t *) udp;
2970 icmp_echo_header_t *echo = (icmp_echo_header_t *)(icmp + 1);
2971 if (!icmp_is_error_message (icmp))
2972 port = echo->identifier;
2975 ip4_header_t *inner_ip = (ip4_header_t *)(echo + 1);
2976 proto = ip_proto_to_snat_proto (inner_ip->protocol);
2977 void *l4_header = ip4_next_header (inner_ip);
2980 case SNAT_PROTOCOL_ICMP:
2981 icmp = (icmp46_header_t*)l4_header;
2982 echo = (icmp_echo_header_t *)(icmp + 1);
2983 port = echo->identifier;
2985 case SNAT_PROTOCOL_UDP:
2986 case SNAT_PROTOCOL_TCP:
2987 port = ((tcp_udp_header_t*)l4_header)->src_port;
2990 return vlib_get_thread_index ();
2995 /* try static mappings with port */
2996 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
2998 m_key.addr = ip0->dst_address;
2999 m_key.port = clib_net_to_host_u16 (port);
3000 m_key.protocol = proto;
3001 m_key.fib_index = rx_fib_index0;
3002 kv.key = m_key.as_u64;
3003 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
3005 m = pool_elt_at_index (sm->static_mappings, value.value);
3006 return m->workers[0];
3010 /* worker by outside port */
3011 next_worker_index = sm->first_worker_index;
3012 next_worker_index +=
3013 sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread];
3014 return next_worker_index;
3018 nat44_ed_get_worker_out2in_cb (ip4_header_t * ip, u32 rx_fib_index)
3020 snat_main_t *sm = &snat_main;
3021 clib_bihash_kv_8_8_t kv, value;
3022 u32 proto, next_worker_index = 0;
3025 snat_static_mapping_t *m;
3028 /* first try static mappings without port */
3029 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3031 make_sm_kv (&kv, &ip->dst_address, 0, rx_fib_index, 0);
3032 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
3034 m = pool_elt_at_index (sm->static_mappings, value.value);
3035 return m->workers[0];
3039 proto = ip_proto_to_snat_proto (ip->protocol);
3041 /* unknown protocol */
3042 if (PREDICT_FALSE (proto == ~0))
3044 /* use current thread */
3045 return vlib_get_thread_index ();
3048 udp = ip4_next_header (ip);
3049 port = udp->dst_port;
3051 if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP))
3053 icmp46_header_t * icmp = (icmp46_header_t *) udp;
3054 icmp_echo_header_t *echo = (icmp_echo_header_t *)(icmp + 1);
3055 if (!icmp_is_error_message (icmp))
3056 port = echo->identifier;
3059 ip4_header_t *inner_ip = (ip4_header_t *)(echo + 1);
3060 proto = ip_proto_to_snat_proto (inner_ip->protocol);
3061 void *l4_header = ip4_next_header (inner_ip);
3064 case SNAT_PROTOCOL_ICMP:
3065 icmp = (icmp46_header_t*)l4_header;
3066 echo = (icmp_echo_header_t *)(icmp + 1);
3067 port = echo->identifier;
3069 case SNAT_PROTOCOL_UDP:
3070 case SNAT_PROTOCOL_TCP:
3071 port = ((tcp_udp_header_t*)l4_header)->src_port;
3074 return vlib_get_thread_index ();
3079 /* try static mappings with port */
3080 if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
3082 make_sm_kv (&kv, &ip->dst_address, proto, rx_fib_index,
3083 clib_net_to_host_u16 (port));
3084 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
3086 m = pool_elt_at_index (sm->static_mappings, value.value);
3087 if (!vec_len(m->locals))
3088 return m->workers[0];
3090 hash = ip->src_address.as_u32 + (ip->src_address.as_u32 >> 8) +
3091 (ip->src_address.as_u32 >> 16) + (ip->src_address.as_u32 >>24);
3093 if (PREDICT_TRUE (is_pow2 (_vec_len (m->workers))))
3094 return m->workers[hash & (_vec_len (m->workers) - 1)];
3096 return m->workers[hash % _vec_len (m->workers)];
3100 /* worker by outside port */
3101 next_worker_index = sm->first_worker_index;
3102 next_worker_index +=
3103 sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread];
3105 return next_worker_index;
3108 static clib_error_t *
3109 snat_config (vlib_main_t * vm, unformat_input_t * input)
3111 snat_main_t * sm = &snat_main;
3112 nat66_main_t * nm = &nat66_main;
3113 u32 translation_buckets = 1024;
3114 u32 translation_memory_size = 128<<20;
3115 u32 user_buckets = 128;
3116 u32 user_memory_size = 64<<20;
3117 u32 max_translations_per_user = 100;
3118 u32 outside_vrf_id = 0;
3119 u32 outside_ip6_vrf_id = 0;
3120 u32 inside_vrf_id = 0;
3121 u32 static_mapping_buckets = 1024;
3122 u32 static_mapping_memory_size = 64<<20;
3123 u32 nat64_bib_buckets = 1024;
3124 u32 nat64_bib_memory_size = 128 << 20;
3125 u32 nat64_st_buckets = 2048;
3126 u32 nat64_st_memory_size = 256 << 20;
3127 u8 static_mapping_only = 0;
3128 u8 static_mapping_connection_tracking = 0;
3129 snat_main_per_thread_data_t *tsm;
3130 dslite_main_t * dm = &dslite_main;
3132 sm->deterministic = 0;
3134 sm->endpoint_dependent = 0;
3136 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3138 if (unformat (input, "translation hash buckets %d", &translation_buckets))
3140 else if (unformat (input, "translation hash memory %d",
3141 &translation_memory_size));
3142 else if (unformat (input, "user hash buckets %d", &user_buckets))
3144 else if (unformat (input, "user hash memory %d",
3147 else if (unformat (input, "max translations per user %d",
3148 &max_translations_per_user))
3150 else if (unformat (input, "outside VRF id %d",
3153 else if (unformat (input, "outside ip6 VRF id %d",
3154 &outside_ip6_vrf_id))
3156 else if (unformat (input, "inside VRF id %d",
3159 else if (unformat (input, "static mapping only"))
3161 static_mapping_only = 1;
3162 if (unformat (input, "connection tracking"))
3163 static_mapping_connection_tracking = 1;
3165 else if (unformat (input, "deterministic"))
3166 sm->deterministic = 1;
3167 else if (unformat (input, "nat64 bib hash buckets %d",
3168 &nat64_bib_buckets))
3170 else if (unformat (input, "nat64 bib hash memory %d",
3171 &nat64_bib_memory_size))
3173 else if (unformat (input, "nat64 st hash buckets %d", &nat64_st_buckets))
3175 else if (unformat (input, "nat64 st hash memory %d",
3176 &nat64_st_memory_size))
3178 else if (unformat (input, "out2in dpo"))
3180 else if (unformat (input, "dslite ce"))
3181 dslite_set_ce(dm, 1);
3182 else if (unformat (input, "endpoint-dependent"))
3183 sm->endpoint_dependent = 1;
3185 return clib_error_return (0, "unknown input '%U'",
3186 format_unformat_error, input);
3189 if (sm->deterministic && sm->endpoint_dependent)
3190 return clib_error_return (
3191 0, "deterministic and endpoint-dependent modes are mutually exclusive");
3193 if (static_mapping_only && (sm->deterministic || sm->endpoint_dependent))
3194 return clib_error_return (
3195 0, "static mapping only mode available only for simple nat");
3197 if (sm->out2in_dpo && (sm->deterministic || sm->endpoint_dependent))
3198 return clib_error_return (
3199 0, "out2in dpo mode available only for simple nat");
3201 /* for show commands, etc. */
3202 sm->translation_buckets = translation_buckets;
3203 sm->translation_memory_size = translation_memory_size;
3204 /* do not exceed load factor 10 */
3205 sm->max_translations = 10 * translation_buckets;
3206 sm->user_buckets = user_buckets;
3207 sm->user_memory_size = user_memory_size;
3208 sm->max_translations_per_user = max_translations_per_user;
3209 sm->outside_vrf_id = outside_vrf_id;
3210 sm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
3212 FIB_SOURCE_PLUGIN_HI);
3213 nm->outside_vrf_id = outside_ip6_vrf_id;
3214 nm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
3216 FIB_SOURCE_PLUGIN_HI);
3217 sm->inside_vrf_id = inside_vrf_id;
3218 sm->inside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
3220 FIB_SOURCE_PLUGIN_HI);
3221 sm->static_mapping_only = static_mapping_only;
3222 sm->static_mapping_connection_tracking = static_mapping_connection_tracking;
3224 nat64_set_hash(nat64_bib_buckets, nat64_bib_memory_size, nat64_st_buckets,
3225 nat64_st_memory_size);
3227 if (sm->deterministic)
3229 sm->in2out_node_index = snat_det_in2out_node.index;
3230 sm->in2out_output_node_index = ~0;
3231 sm->out2in_node_index = snat_det_out2in_node.index;
3232 sm->icmp_match_in2out_cb = icmp_match_in2out_det;
3233 sm->icmp_match_out2in_cb = icmp_match_out2in_det;
3237 if (sm->endpoint_dependent)
3239 sm->worker_in2out_cb = snat_get_worker_in2out_cb;
3240 sm->worker_out2in_cb = nat44_ed_get_worker_out2in_cb;
3241 sm->in2out_node_index = nat44_ed_in2out_node.index;
3242 sm->in2out_output_node_index = nat44_ed_in2out_output_node.index;
3243 sm->out2in_node_index = nat44_ed_out2in_node.index;
3244 sm->icmp_match_in2out_cb = icmp_match_in2out_ed;
3245 sm->icmp_match_out2in_cb = icmp_match_out2in_ed;
3246 nat_affinity_init (vm);
3250 sm->worker_in2out_cb = snat_get_worker_in2out_cb;
3251 sm->worker_out2in_cb = snat_get_worker_out2in_cb;
3252 sm->in2out_node_index = snat_in2out_node.index;
3253 sm->in2out_output_node_index = snat_in2out_output_node.index;
3254 sm->out2in_node_index = snat_out2in_node.index;
3255 sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
3256 sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
3258 if (!static_mapping_only ||
3259 (static_mapping_only && static_mapping_connection_tracking))
3261 vec_foreach (tsm, sm->per_thread_data)
3263 if (sm->endpoint_dependent)
3265 clib_bihash_init_16_8 (&tsm->in2out_ed, "in2out-ed",
3266 translation_buckets,
3267 translation_memory_size);
3268 clib_bihash_set_kvp_format_fn_16_8 (&tsm->in2out_ed,
3269 format_ed_session_kvp);
3271 clib_bihash_init_16_8 (&tsm->out2in_ed, "out2in-ed",
3272 translation_buckets,
3273 translation_memory_size);
3274 clib_bihash_set_kvp_format_fn_16_8 (&tsm->out2in_ed,
3275 format_ed_session_kvp);
3279 clib_bihash_init_8_8 (&tsm->in2out, "in2out",
3280 translation_buckets,
3281 translation_memory_size);
3282 clib_bihash_set_kvp_format_fn_8_8 (&tsm->in2out,
3283 format_session_kvp);
3285 clib_bihash_init_8_8 (&tsm->out2in, "out2in",
3286 translation_buckets,
3287 translation_memory_size);
3288 clib_bihash_set_kvp_format_fn_8_8 (&tsm->out2in,
3289 format_session_kvp);
3292 clib_bihash_init_8_8 (&tsm->user_hash, "users", user_buckets,
3294 clib_bihash_set_kvp_format_fn_8_8 (&tsm->user_hash,
3301 sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
3302 sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
3304 clib_bihash_init_8_8 (&sm->static_mapping_by_local,
3305 "static_mapping_by_local", static_mapping_buckets,
3306 static_mapping_memory_size);
3307 clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_local,
3308 format_static_mapping_kvp);
3310 clib_bihash_init_8_8 (&sm->static_mapping_by_external,
3311 "static_mapping_by_external", static_mapping_buckets,
3312 static_mapping_memory_size);
3313 clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_external,
3314 format_static_mapping_kvp);
3320 VLIB_CONFIG_FUNCTION (snat_config, "nat");
3322 u8 * format_snat_session_state (u8 * s, va_list * args)
3324 u32 i = va_arg (*args, u32);
3329 #define _(v, N, str) case SNAT_SESSION_##N: t = (u8 *) str; break;
3330 foreach_snat_session_state
3333 t = format (t, "unknown");
3335 s = format (s, "%s", t);
3339 u8 * format_snat_key (u8 * s, va_list * args)
3341 snat_session_key_t * key = va_arg (*args, snat_session_key_t *);
3343 s = format (s, "%U proto %U port %d fib %d",
3344 format_ip4_address, &key->addr,
3345 format_snat_protocol, key->protocol,
3346 clib_net_to_host_u16 (key->port), key->fib_index);
3350 u8 * format_static_mapping_key (u8 * s, va_list * args)
3352 snat_session_key_t * key = va_arg (*args, snat_session_key_t *);
3354 s = format (s, "%U proto %U port %d fib %d",
3355 format_ip4_address, &key->addr,
3356 format_snat_protocol, key->protocol,
3357 key->port, key->fib_index);
3361 u8 * format_snat_session (u8 * s, va_list * args)
3363 snat_main_per_thread_data_t * sm = va_arg (*args, snat_main_per_thread_data_t *);
3364 snat_session_t * sess = va_arg (*args, snat_session_t *);
3366 if (snat_is_unk_proto_session (sess))
3368 s = format (s, " i2o %U proto %u fib %u\n",
3369 format_ip4_address, &sess->in2out.addr,
3370 clib_net_to_host_u16 (sess->in2out.port),
3371 sess->in2out.fib_index);
3372 s = format (s, " o2i %U proto %u fib %u\n",
3373 format_ip4_address, &sess->out2in.addr,
3374 clib_net_to_host_u16 (sess->out2in.port),
3375 sess->out2in.fib_index);
3379 s = format (s, " i2o %U\n", format_snat_key, &sess->in2out);
3380 s = format (s, " o2i %U\n", format_snat_key, &sess->out2in);
3382 if (is_ed_session (sess) || is_fwd_bypass_session (sess))
3384 if (is_twice_nat_session (sess))
3386 s = format (s, " external host o2i %U:%d i2o %U:%d\n",
3387 format_ip4_address, &sess->ext_host_addr,
3388 clib_net_to_host_u16 (sess->ext_host_port),
3389 format_ip4_address, &sess->ext_host_nat_addr,
3390 clib_net_to_host_u16 (sess->ext_host_nat_port));
3394 if (sess->ext_host_addr.as_u32)
3395 s = format (s, " external host %U:%u\n",
3396 format_ip4_address, &sess->ext_host_addr,
3397 clib_net_to_host_u16 (sess->ext_host_port));
3400 s = format (s, " index %llu\n", sess - sm->sessions);
3401 s = format (s, " last heard %.2f\n", sess->last_heard);
3402 s = format (s, " total pkts %d, total bytes %lld\n",
3403 sess->total_pkts, sess->total_bytes);
3404 if (snat_is_session_static (sess))
3405 s = format (s, " static translation\n");
3407 s = format (s, " dynamic translation\n");
3408 if (is_fwd_bypass_session (sess))
3409 s = format (s, " forwarding-bypass\n");
3410 if (is_lb_session (sess))
3411 s = format (s, " load-balancing\n");
3412 if (is_twice_nat_session (sess))
3413 s = format (s, " twice-nat\n");
3418 u8 * format_snat_user (u8 * s, va_list * args)
3420 snat_main_per_thread_data_t * sm = va_arg (*args, snat_main_per_thread_data_t *);
3421 snat_user_t * u = va_arg (*args, snat_user_t *);
3422 int verbose = va_arg (*args, int);
3423 dlist_elt_t * head, * elt;
3424 u32 elt_index, head_index;
3426 snat_session_t * sess;
3428 s = format (s, "%U: %d dynamic translations, %d static translations\n",
3429 format_ip4_address, &u->addr, u->nsessions, u->nstaticsessions);
3434 if (u->nsessions || u->nstaticsessions)
3436 head_index = u->sessions_per_user_list_head_index;
3437 head = pool_elt_at_index (sm->list_pool, head_index);
3439 elt_index = head->next;
3440 elt = pool_elt_at_index (sm->list_pool, elt_index);
3441 session_index = elt->value;
3443 while (session_index != ~0)
3445 sess = pool_elt_at_index (sm->sessions, session_index);
3447 s = format (s, " %U\n", format_snat_session, sm, sess);
3449 elt_index = elt->next;
3450 elt = pool_elt_at_index (sm->list_pool, elt_index);
3451 session_index = elt->value;
3458 u8 * format_snat_static_mapping (u8 * s, va_list * args)
3460 snat_static_mapping_t *m = va_arg (*args, snat_static_mapping_t *);
3461 nat44_lb_addr_port_t *local;
3464 s = format (s, "local %U external %U vrf %d %s %s",
3465 format_ip4_address, &m->local_addr,
3466 format_ip4_address, &m->external_addr,
3468 m->twice_nat == TWICE_NAT ? "twice-nat" :
3469 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
3470 m->out2in_only ? "out2in-only" : "");
3473 if (vec_len (m->locals))
3475 s = format (s, "%U external %U:%d %s %s",
3476 format_snat_protocol, m->proto,
3477 format_ip4_address, &m->external_addr, m->external_port,
3478 m->twice_nat == TWICE_NAT ? "twice-nat" :
3479 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
3480 m->out2in_only ? "out2in-only" : "");
3481 vec_foreach (local, m->locals)
3482 s = format (s, "\n local %U:%d vrf %d probability %d\%",
3483 format_ip4_address, &local->addr, local->port,
3484 local->vrf_id, local->probability);
3487 s = format (s, "%U local %U:%d external %U:%d vrf %d %s %s",
3488 format_snat_protocol, m->proto,
3489 format_ip4_address, &m->local_addr, m->local_port,
3490 format_ip4_address, &m->external_addr, m->external_port,
3492 m->twice_nat == TWICE_NAT ? "twice-nat" :
3493 m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
3494 m->out2in_only ? "out2in-only" : "");
3499 u8 * format_snat_static_map_to_resolve (u8 * s, va_list * args)
3501 snat_static_map_resolve_t *m = va_arg (*args, snat_static_map_resolve_t *);
3502 vnet_main_t *vnm = vnet_get_main();
3505 s = format (s, "local %U external %U vrf %d",
3506 format_ip4_address, &m->l_addr,
3507 format_vnet_sw_if_index_name, vnm, m->sw_if_index,
3510 s = format (s, "%U local %U:%d external %U:%d vrf %d",
3511 format_snat_protocol, m->proto,
3512 format_ip4_address, &m->l_addr, m->l_port,
3513 format_vnet_sw_if_index_name, vnm, m->sw_if_index,
3514 m->e_port, m->vrf_id);
3519 u8 * format_det_map_ses (u8 * s, va_list * args)
3521 snat_det_map_t * det_map = va_arg (*args, snat_det_map_t *);
3522 ip4_address_t in_addr, out_addr;
3523 u32 in_offset, out_offset;
3524 snat_det_session_t * ses = va_arg (*args, snat_det_session_t *);
3525 u32 * i = va_arg (*args, u32 *);
3527 u32 user_index = *i / SNAT_DET_SES_PER_USER;
3528 in_addr.as_u32 = clib_host_to_net_u32 (
3529 clib_net_to_host_u32(det_map->in_addr.as_u32) + user_index);
3530 in_offset = clib_net_to_host_u32(in_addr.as_u32) -
3531 clib_net_to_host_u32(det_map->in_addr.as_u32);
3532 out_offset = in_offset / det_map->sharing_ratio;
3533 out_addr.as_u32 = clib_host_to_net_u32(
3534 clib_net_to_host_u32(det_map->out_addr.as_u32) + out_offset);
3535 s = format (s, "in %U:%d out %U:%d external host %U:%d state: %U expire: %d\n",
3536 format_ip4_address, &in_addr,
3537 clib_net_to_host_u16 (ses->in_port),
3538 format_ip4_address, &out_addr,
3539 clib_net_to_host_u16 (ses->out.out_port),
3540 format_ip4_address, &ses->out.ext_host_addr,
3541 clib_net_to_host_u16 (ses->out.ext_host_port),
3542 format_snat_session_state, ses->state,
3549 nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
3552 ip4_address_t * address,
3554 u32 if_address_index,
3557 snat_main_t *sm = &snat_main;
3558 snat_static_map_resolve_t *rp;
3559 snat_static_mapping_t *m;
3560 snat_session_key_t m_key;
3561 clib_bihash_kv_8_8_t kv, value;
3563 ip4_address_t l_addr;
3565 for (i = 0; i < vec_len (sm->to_resolve); i++)
3567 rp = sm->to_resolve + i;
3568 if (rp->addr_only == 0)
3570 if (rp->sw_if_index == sw_if_index)
3577 m_key.addr.as_u32 = address->as_u32;
3578 m_key.port = rp->addr_only ? 0 : rp->e_port;
3579 m_key.protocol = rp->addr_only ? 0 : rp->proto;
3580 m_key.fib_index = sm->outside_fib_index;
3581 kv.key = m_key.as_u64;
3582 if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
3585 m = pool_elt_at_index (sm->static_mappings, value.value);
3589 /* Don't trip over lease renewal, static config */
3599 /* Indetity mapping? */
3600 if (rp->l_addr.as_u32 == 0)
3601 l_addr.as_u32 = address[0].as_u32;
3603 l_addr.as_u32 = rp->l_addr.as_u32;
3604 /* Add the static mapping */
3605 rv = snat_add_static_mapping (l_addr,
3611 ~0 /* sw_if_index */,
3616 nat_log_notice ("snat_add_static_mapping returned %d", rv);
3620 snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
3623 ip4_address_t * address,
3625 u32 if_address_index,
3628 snat_main_t *sm = &snat_main;
3629 snat_static_map_resolve_t *rp;
3630 ip4_address_t l_addr;
3634 snat_address_t *addresses = sm->addresses;
3636 for (i = 0; i < vec_len(sm->auto_add_sw_if_indices); i++)
3638 if (sw_if_index == sm->auto_add_sw_if_indices[i])
3642 for (i = 0; i < vec_len(sm->auto_add_sw_if_indices_twice_nat); i++)
3645 addresses = sm->twice_nat_addresses;
3646 if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i])
3655 /* Don't trip over lease renewal, static config */
3656 for (j = 0; j < vec_len(addresses); j++)
3657 if (addresses[j].addr.as_u32 == address->as_u32)
3660 (void) snat_add_address (sm, address, ~0, twice_nat);
3661 /* Scan static map resolution vector */
3662 for (j = 0; j < vec_len (sm->to_resolve); j++)
3664 rp = sm->to_resolve + j;
3667 /* On this interface? */
3668 if (rp->sw_if_index == sw_if_index)
3670 /* Indetity mapping? */
3671 if (rp->l_addr.as_u32 == 0)
3672 l_addr.as_u32 = address[0].as_u32;
3674 l_addr.as_u32 = rp->l_addr.as_u32;
3675 /* Add the static mapping */
3676 rv = snat_add_static_mapping (l_addr,
3682 ~0 /* sw_if_index */,
3687 nat_log_notice ("snat_add_static_mapping returned %d", rv);
3694 (void) snat_del_address(sm, address[0], 1, twice_nat);
3700 int snat_add_interface_address (snat_main_t *sm, u32 sw_if_index, int is_del,
3703 ip4_main_t * ip4_main = sm->ip4_main;
3704 ip4_address_t * first_int_addr;
3705 snat_static_map_resolve_t *rp;
3706 u32 *indices_to_delete = 0;
3708 u32 *auto_add_sw_if_indices =
3709 twice_nat ? sm->auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices;
3711 first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index,
3712 0 /* just want the address*/);
3714 for (i = 0; i < vec_len(auto_add_sw_if_indices); i++)
3716 if (auto_add_sw_if_indices[i] == sw_if_index)
3720 /* if have address remove it */
3722 (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat);
3725 for (j = 0; j < vec_len (sm->to_resolve); j++)
3727 rp = sm->to_resolve + j;
3728 if (rp->sw_if_index == sw_if_index)
3729 vec_add1 (indices_to_delete, j);
3731 if (vec_len(indices_to_delete))
3733 for (j = vec_len(indices_to_delete)-1; j >= 0; j--)
3734 vec_del1(sm->to_resolve, j);
3735 vec_free(indices_to_delete);
3739 vec_del1(sm->auto_add_sw_if_indices_twice_nat, i);
3741 vec_del1(sm->auto_add_sw_if_indices, i);
3744 return VNET_API_ERROR_VALUE_EXIST;
3751 return VNET_API_ERROR_NO_SUCH_ENTRY;
3753 /* add to the auto-address list */
3755 vec_add1(sm->auto_add_sw_if_indices_twice_nat, sw_if_index);
3757 vec_add1(sm->auto_add_sw_if_indices, sw_if_index);
3759 /* If the address is already bound - or static - add it now */
3761 (void) snat_add_address (sm, first_int_addr, ~0, twice_nat);
3767 nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
3768 snat_protocol_t proto, u32 vrf_id, int is_in)
3770 snat_main_per_thread_data_t *tsm;
3771 clib_bihash_kv_8_8_t kv, value;
3773 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3774 snat_session_key_t key;
3776 clib_bihash_8_8_t *t;
3778 if (sm->endpoint_dependent)
3779 return VNET_API_ERROR_UNSUPPORTED;
3781 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3782 if (sm->num_workers > 1)
3784 vec_elt_at_index (sm->per_thread_data,
3785 sm->worker_in2out_cb (&ip, fib_index));
3787 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
3789 key.addr.as_u32 = addr->as_u32;
3790 key.port = clib_host_to_net_u16 (port);
3791 key.protocol = proto;
3792 key.fib_index = fib_index;
3793 kv.key = key.as_u64;
3794 t = is_in ? &tsm->in2out : &tsm->out2in;
3795 if (!clib_bihash_search_8_8 (t, &kv, &value))
3797 if (pool_is_free_index (tsm->sessions, value.value))
3798 return VNET_API_ERROR_UNSPECIFIED;
3800 s = pool_elt_at_index (tsm->sessions, value.value);
3801 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
3802 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
3806 return VNET_API_ERROR_NO_SUCH_ENTRY;
3810 nat44_del_ed_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
3811 ip4_address_t *eh_addr, u16 eh_port, u8 proto,
3812 u32 vrf_id, int is_in)
3815 clib_bihash_16_8_t *t;
3816 nat_ed_ses_key_t key;
3817 clib_bihash_kv_16_8_t kv, value;
3818 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
3820 snat_main_per_thread_data_t *tsm;
3822 if (!sm->endpoint_dependent)
3823 return VNET_API_ERROR_FEATURE_DISABLED;
3825 ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32;
3826 if (sm->num_workers > 1)
3828 vec_elt_at_index (sm->per_thread_data,
3829 sm->worker_in2out_cb (&ip, fib_index));
3831 tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
3833 t = is_in ? &tsm->in2out_ed : &tsm->out2in_ed;
3834 key.l_addr.as_u32 = addr->as_u32;
3835 key.r_addr.as_u32 = eh_addr->as_u32;
3836 key.l_port = clib_host_to_net_u16 (port);
3837 key.r_port = clib_host_to_net_u16 (eh_port);
3839 key.fib_index = clib_host_to_net_u32 (fib_index);
3840 kv.key[0] = key.as_u64[0];
3841 kv.key[1] = key.as_u64[1];
3842 if (clib_bihash_search_16_8 (t, &kv, &value))
3843 return VNET_API_ERROR_NO_SUCH_ENTRY;
3845 if (pool_is_free_index (tsm->sessions, value.value))
3846 return VNET_API_ERROR_UNSPECIFIED;
3847 s = pool_elt_at_index (tsm->sessions, value.value);
3848 nat_free_session_data (sm, s, tsm - sm->per_thread_data);
3849 nat44_delete_session (sm, s, tsm - sm->per_thread_data);
3854 nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length)
3856 snat_main_t *sm = &snat_main;
3858 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_MAPE;
3859 sm->alloc_addr_and_port = nat_alloc_addr_and_port_mape;
3861 sm->psid_offset = psid_offset;
3862 sm->psid_length = psid_length;
3866 nat_set_alloc_addr_and_port_range (u16 start_port, u16 end_port)
3868 snat_main_t *sm = &snat_main;
3870 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_RANGE;
3871 sm->alloc_addr_and_port = nat_alloc_addr_and_port_range;
3872 sm->start_port = start_port;
3873 sm->end_port = end_port;
3877 nat_set_alloc_addr_and_port_default (void)
3879 snat_main_t *sm = &snat_main;
3881 sm->addr_and_port_alloc_alg = NAT_ADDR_AND_PORT_ALLOC_ALG_DEFAULT;
3882 sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;