Line data Source code
1 : /*
2 : * nat44_ei.c - nat44 endpoint dependent plugin
3 : *
4 : * Copyright (c) 2020 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:
8 : *
9 : * http://www.apache.org/licenses/LICENSE-2.0
10 : *
11 : * Unless required by applicable law or agreed to in writing, software
12 : * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
13 : * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
14 : * License for the specific language governing permissions and limitations
15 : * under the License.
16 : */
17 :
18 : #include <vnet/plugin/plugin.h>
19 : #include <vpp/app/version.h>
20 :
21 : #include <vnet/vnet.h>
22 : #include <vnet/ip/ip.h>
23 : #include <vnet/ip/ip4.h>
24 : #include <vnet/ip/ip_table.h>
25 : #include <vnet/ip/reass/ip4_sv_reass.h>
26 : #include <vnet/fib/fib_table.h>
27 : #include <vnet/fib/ip4_fib.h>
28 : #include <vnet/plugin/plugin.h>
29 :
30 : // nat lib
31 : #include <nat/lib/log.h>
32 : #include <nat/lib/nat_syslog.h>
33 : #include <nat/lib/nat_inlines.h>
34 : #include <nat/lib/ipfix_logging.h>
35 :
36 : #include <nat/nat44-ei/nat44_ei_dpo.h>
37 : #include <nat/nat44-ei/nat44_ei_inlines.h>
38 : #include <nat/nat44-ei/nat44_ei.h>
39 :
40 : nat44_ei_main_t nat44_ei_main;
41 :
42 : extern vlib_node_registration_t nat44_ei_hairpinning_node;
43 : extern vlib_node_registration_t
44 : nat44_ei_in2out_hairpinning_finish_ip4_lookup_node;
45 : extern vlib_node_registration_t
46 : nat44_ei_in2out_hairpinning_finish_interface_output_node;
47 :
48 : #define skip_if_disabled() \
49 : do \
50 : { \
51 : nat44_ei_main_t *nm = &nat44_ei_main; \
52 : if (PREDICT_FALSE (!nm->enabled)) \
53 : return; \
54 : } \
55 : while (0)
56 :
57 : #define fail_if_enabled() \
58 : do \
59 : { \
60 : nat44_ei_main_t *nm = &nat44_ei_main; \
61 : if (PREDICT_FALSE (nm->enabled)) \
62 : { \
63 : nat44_ei_log_err ("plugin enabled"); \
64 : return VNET_API_ERROR_FEATURE_ALREADY_ENABLED; \
65 : } \
66 : } \
67 : while (0)
68 :
69 : #define fail_if_disabled() \
70 : do \
71 : { \
72 : nat44_ei_main_t *nm = &nat44_ei_main; \
73 : if (PREDICT_FALSE (!nm->enabled)) \
74 : { \
75 : nat44_ei_log_err ("plugin disabled"); \
76 : return VNET_API_ERROR_FEATURE_ALREADY_DISABLED; \
77 : } \
78 : } \
79 : while (0)
80 :
81 : /* Hook up input features */
82 34159 : VNET_FEATURE_INIT (ip4_nat_classify, static) = {
83 : .arc_name = "ip4-unicast",
84 : .node_name = "nat44-ei-classify",
85 : .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
86 : "ip4-sv-reassembly-feature"),
87 : };
88 34159 : VNET_FEATURE_INIT (ip4_nat_handoff_classify, static) = {
89 : .arc_name = "ip4-unicast",
90 : .node_name = "nat44-ei-handoff-classify",
91 : .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
92 : "ip4-sv-reassembly-feature"),
93 : };
94 34159 : VNET_FEATURE_INIT (ip4_nat44_ei_in2out, static) = {
95 : .arc_name = "ip4-unicast",
96 : .node_name = "nat44-ei-in2out",
97 : .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
98 : "ip4-sv-reassembly-feature"),
99 : };
100 34159 : VNET_FEATURE_INIT (ip4_nat44_ei_out2in, static) = {
101 : .arc_name = "ip4-unicast",
102 : .node_name = "nat44-ei-out2in",
103 : .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
104 : "ip4-sv-reassembly-feature",
105 : "ip4-dhcp-client-detect"),
106 : };
107 34159 : VNET_FEATURE_INIT (ip4_nat44_ei_in2out_output, static) = {
108 : .arc_name = "ip4-output",
109 : .node_name = "nat44-ei-in2out-output",
110 : .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa",
111 : "ip4-sv-reassembly-output-feature"),
112 : };
113 34159 : VNET_FEATURE_INIT (ip4_nat44_ei_hairpinning, static) = {
114 : .arc_name = "ip4-local",
115 : .node_name = "nat44-ei-hairpinning",
116 : .runs_before = VNET_FEATURES ("ip4-local-end-of-arc"),
117 : };
118 34159 : VNET_FEATURE_INIT (ip4_nat44_ei_in2out_worker_handoff, static) = {
119 : .arc_name = "ip4-unicast",
120 : .node_name = "nat44-ei-in2out-worker-handoff",
121 : .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
122 : };
123 34159 : VNET_FEATURE_INIT (ip4_nat44_ei_out2in_worker_handoff, static) = {
124 : .arc_name = "ip4-unicast",
125 : .node_name = "nat44-ei-out2in-worker-handoff",
126 : .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
127 : "ip4-dhcp-client-detect"),
128 : };
129 34159 : VNET_FEATURE_INIT (ip4_nat44_ei_in2out_output_worker_handoff, static) = {
130 : .arc_name = "ip4-output",
131 : .node_name = "nat44-ei-in2out-output-worker-handoff",
132 : .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa",
133 : "ip4-sv-reassembly-output-feature"),
134 : };
135 :
136 : VLIB_PLUGIN_REGISTER () = {
137 : .version = VPP_BUILD_VER,
138 : .description = "IPv4 Endpoint-Independent NAT (NAT44 EI)",
139 : };
140 :
141 : #define foreach_nat44_ei_classify_error \
142 : _ (NEXT_IN2OUT, "next in2out") \
143 : _ (NEXT_OUT2IN, "next out2in") \
144 : _ (FRAG_CACHED, "fragment cached")
145 :
146 : typedef enum
147 : {
148 : #define _(sym, str) NAT44_EI_CLASSIFY_ERROR_##sym,
149 : foreach_nat44_ei_classify_error
150 : #undef _
151 : NAT44_EI_CLASSIFY_N_ERROR,
152 : } nat44_ei_classify_error_t;
153 :
154 : static char *nat44_ei_classify_error_strings[] = {
155 : #define _(sym, string) string,
156 : foreach_nat44_ei_classify_error
157 : #undef _
158 : };
159 :
160 : typedef enum
161 : {
162 : NAT44_EI_CLASSIFY_NEXT_IN2OUT,
163 : NAT44_EI_CLASSIFY_NEXT_OUT2IN,
164 : NAT44_EI_CLASSIFY_NEXT_DROP,
165 : NAT44_EI_CLASSIFY_N_NEXT,
166 : } nat44_ei_classify_next_t;
167 :
168 : typedef struct
169 : {
170 : u8 next_in2out;
171 : u8 cached;
172 : } nat44_ei_classify_trace_t;
173 :
174 : void nat44_ei_add_del_addr_to_fib (ip4_address_t *addr, u8 p_len,
175 : u32 sw_if_index, int is_add);
176 :
177 : static void nat44_ei_worker_db_free (nat44_ei_main_per_thread_data_t *tnm);
178 :
179 : static int nat44_ei_add_static_mapping_internal (
180 : ip4_address_t l_addr, ip4_address_t e_addr, u16 l_port, u16 e_port,
181 : nat_protocol_t proto, u32 vrf_id, u32 sw_if_index, u32 flags,
182 : ip4_address_t pool_addr, u8 *tag);
183 :
184 : static int nat44_ei_del_static_mapping_internal (
185 : ip4_address_t l_addr, ip4_address_t e_addr, u16 l_port, u16 e_port,
186 : nat_protocol_t proto, u32 vrf_id, u32 sw_if_index, u32 flags);
187 :
188 : always_inline bool
189 31389 : nat44_ei_port_is_used (nat44_ei_address_t *a, u8 proto, u16 port)
190 : {
191 31389 : return clib_bitmap_get (a->busy_port_bitmap[proto], port);
192 : }
193 :
194 : always_inline void
195 10454 : nat44_ei_port_get (nat44_ei_address_t *a, u8 proto, u16 port)
196 : {
197 10454 : ASSERT (!nat44_ei_port_is_used (a, proto, port));
198 20908 : a->busy_port_bitmap[proto] =
199 10454 : clib_bitmap_set (a->busy_port_bitmap[proto], port, 1);
200 10454 : }
201 :
202 : always_inline void
203 10451 : nat44_ei_port_put (nat44_ei_address_t *a, u8 proto, u16 port)
204 : {
205 10451 : ASSERT (nat44_ei_port_is_used (a, proto, port));
206 20902 : a->busy_port_bitmap[proto] =
207 10451 : clib_bitmap_set (a->busy_port_bitmap[proto], port, 0);
208 10451 : }
209 :
210 : static u8 *
211 1 : format_nat44_ei_classify_trace (u8 *s, va_list *args)
212 : {
213 1 : CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
214 1 : CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
215 1 : nat44_ei_classify_trace_t *t = va_arg (*args, nat44_ei_classify_trace_t *);
216 : char *next;
217 :
218 1 : if (t->cached)
219 0 : s = format (s, "nat44-ei-classify: fragment cached");
220 : else
221 : {
222 1 : next = t->next_in2out ? "nat44-ei-in2out" : "nat44-ei-out2in";
223 1 : s = format (s, "nat44-ei-classify: next %s", next);
224 : }
225 :
226 1 : return s;
227 : }
228 :
229 : static void nat44_ei_db_init (u32 translations, u32 translation_buckets,
230 : u32 user_buckets);
231 :
232 : static void nat44_ei_ip4_add_del_interface_address_cb (
233 : ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address,
234 : u32 address_length, u32 if_address_index, u32 is_delete);
235 :
236 : static void nat44_ei_ip4_add_del_addr_only_sm_cb (
237 : ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address,
238 : u32 address_length, u32 if_address_index, u32 is_delete);
239 :
240 : static void nat44_ei_update_outside_fib (ip4_main_t *im, uword opaque,
241 : u32 sw_if_index, u32 new_fib_index,
242 : u32 old_fib_index);
243 :
244 : void
245 559 : nat44_ei_set_node_indexes (nat44_ei_main_t *nm, vlib_main_t *vm)
246 : {
247 : vlib_node_t *node;
248 559 : node = vlib_get_node_by_name (vm, (u8 *) "nat44-ei-out2in");
249 559 : nm->out2in_node_index = node->index;
250 559 : node = vlib_get_node_by_name (vm, (u8 *) "nat44-ei-in2out");
251 559 : nm->in2out_node_index = node->index;
252 559 : node = vlib_get_node_by_name (vm, (u8 *) "nat44-ei-in2out-output");
253 559 : nm->in2out_output_node_index = node->index;
254 559 : }
255 :
256 : int
257 14 : nat44_ei_set_workers (uword *bitmap)
258 : {
259 14 : nat44_ei_main_t *nm = &nat44_ei_main;
260 14 : int i, j = 0;
261 :
262 14 : if (nm->num_workers < 2)
263 0 : return VNET_API_ERROR_FEATURE_DISABLED;
264 :
265 14 : if (clib_bitmap_last_set (bitmap) >= nm->num_workers)
266 0 : return VNET_API_ERROR_INVALID_WORKER;
267 :
268 14 : vec_free (nm->workers);
269 46 : clib_bitmap_foreach (i, bitmap)
270 : {
271 32 : vec_add1 (nm->workers, i);
272 32 : nm->per_thread_data[nm->first_worker_index + i].snat_thread_index = j;
273 32 : nm->per_thread_data[nm->first_worker_index + i].thread_index = i;
274 32 : j++;
275 : }
276 :
277 14 : nm->port_per_thread = (0xffff - 1024) / _vec_len (nm->workers);
278 :
279 14 : return 0;
280 : }
281 :
282 : #define nat_validate_simple_counter(c, i) \
283 : do \
284 : { \
285 : vlib_validate_simple_counter (&c, i); \
286 : vlib_zero_simple_counter (&c, i); \
287 : } \
288 : while (0);
289 :
290 : #define nat_init_simple_counter(c, n, sn) \
291 : do \
292 : { \
293 : c.name = n; \
294 : c.stat_segment_name = sn; \
295 : nat_validate_simple_counter (c, 0); \
296 : } \
297 : while (0);
298 :
299 : static_always_inline void
300 110 : nat_validate_interface_counters (nat44_ei_main_t *nm, u32 sw_if_index)
301 : {
302 : #define _(x) \
303 : nat_validate_simple_counter (nm->counters.fastpath.in2out.x, sw_if_index); \
304 : nat_validate_simple_counter (nm->counters.fastpath.out2in.x, sw_if_index); \
305 : nat_validate_simple_counter (nm->counters.slowpath.in2out.x, sw_if_index); \
306 : nat_validate_simple_counter (nm->counters.slowpath.out2in.x, sw_if_index);
307 110 : foreach_nat_counter;
308 : #undef _
309 110 : nat_validate_simple_counter (nm->counters.hairpinning, sw_if_index);
310 110 : }
311 :
312 : static void
313 337 : nat44_ei_add_del_addr_to_fib_foreach_out_if (ip4_address_t *addr, u8 is_add)
314 : {
315 337 : nat44_ei_main_t *nm = &nat44_ei_main;
316 : nat44_ei_interface_t *i;
317 :
318 884 : pool_foreach (i, nm->interfaces)
319 : {
320 547 : if (nat44_ei_interface_is_outside (i) && !nm->out2in_dpo)
321 : {
322 268 : nat44_ei_add_del_addr_to_fib (addr, 32, i->sw_if_index, is_add);
323 : }
324 : }
325 342 : pool_foreach (i, nm->output_feature_interfaces)
326 : {
327 5 : if (nat44_ei_interface_is_outside (i) && !nm->out2in_dpo)
328 : {
329 5 : nat44_ei_add_del_addr_to_fib (addr, 32, i->sw_if_index, is_add);
330 : }
331 : }
332 337 : }
333 :
334 : static_always_inline void
335 110 : nat44_ei_add_del_addr_to_fib_foreach_addr (u32 sw_if_index, u8 is_add)
336 : {
337 110 : nat44_ei_main_t *nm = &nat44_ei_main;
338 : nat44_ei_address_t *ap;
339 :
340 158 : vec_foreach (ap, nm->addresses)
341 : {
342 48 : nat44_ei_add_del_addr_to_fib (&ap->addr, 32, sw_if_index, is_add);
343 : }
344 110 : }
345 :
346 : static_always_inline void
347 110 : nat44_ei_add_del_addr_to_fib_foreach_addr_only_sm (u32 sw_if_index, u8 is_add)
348 : {
349 110 : nat44_ei_main_t *nm = &nat44_ei_main;
350 : nat44_ei_static_mapping_t *m;
351 :
352 129 : pool_foreach (m, nm->static_mappings)
353 : {
354 19 : if (is_sm_addr_only (m->flags) &&
355 10 : !(m->local_addr.as_u32 == m->external_addr.as_u32))
356 : {
357 9 : nat44_ei_add_del_addr_to_fib (&m->external_addr, 32, sw_if_index,
358 : is_add);
359 : }
360 : }
361 110 : }
362 :
363 : static int
364 144 : nat44_ei_is_address_used_in_static_mapping (ip4_address_t addr)
365 : {
366 144 : nat44_ei_main_t *nm = &nat44_ei_main;
367 : nat44_ei_static_mapping_t *m;
368 145 : pool_foreach (m, nm->static_mappings)
369 : {
370 1 : if (is_sm_addr_only (m->flags) || is_sm_identity_nat (m->flags))
371 : {
372 1 : continue;
373 : }
374 0 : if (m->external_addr.as_u32 == addr.as_u32)
375 : {
376 0 : return 1;
377 : }
378 : }
379 144 : return 0;
380 : }
381 :
382 : clib_error_t *
383 559 : nat44_ei_init (vlib_main_t *vm)
384 : {
385 559 : nat44_ei_main_t *nm = &nat44_ei_main;
386 559 : vlib_thread_main_t *tm = vlib_get_thread_main ();
387 : vlib_thread_registration_t *tr;
388 559 : ip4_add_del_interface_address_callback_t cbi = { 0 };
389 559 : ip4_table_bind_callback_t cbt = { 0 };
390 559 : u32 i, num_threads = 0;
391 559 : uword *p, *bitmap = 0;
392 :
393 559 : clib_memset (nm, 0, sizeof (*nm));
394 :
395 : // required
396 559 : nm->vnet_main = vnet_get_main ();
397 : // convenience
398 559 : nm->ip4_main = &ip4_main;
399 559 : nm->api_main = vlibapi_get_main ();
400 559 : nm->ip4_lookup_main = &ip4_main.lookup_main;
401 :
402 : // handoff stuff
403 559 : nm->fq_out2in_index = ~0;
404 559 : nm->fq_in2out_index = ~0;
405 559 : nm->fq_in2out_output_index = ~0;
406 :
407 559 : nm->log_level = NAT_LOG_ERROR;
408 :
409 559 : nat44_ei_set_node_indexes (nm, vm);
410 559 : nm->log_class = vlib_log_register_class ("nat44-ei", 0);
411 :
412 559 : nat_init_simple_counter (nm->total_users, "total-users",
413 : "/nat44-ei/total-users");
414 559 : nat_init_simple_counter (nm->total_sessions, "total-sessions",
415 : "/nat44-ei/total-sessions");
416 559 : nat_init_simple_counter (nm->user_limit_reached, "user-limit-reached",
417 : "/nat44-ei/user-limit-reached");
418 :
419 : #define _(x) \
420 : nat_init_simple_counter (nm->counters.fastpath.in2out.x, #x, \
421 : "/nat44-ei/in2out/fastpath/" #x); \
422 : nat_init_simple_counter (nm->counters.fastpath.out2in.x, #x, \
423 : "/nat44-ei/out2in/fastpath/" #x); \
424 : nat_init_simple_counter (nm->counters.slowpath.in2out.x, #x, \
425 : "/nat44-ei/in2out/slowpath/" #x); \
426 : nat_init_simple_counter (nm->counters.slowpath.out2in.x, #x, \
427 : "/nat44-ei/out2in/slowpath/" #x);
428 559 : foreach_nat_counter;
429 : #undef _
430 559 : nat_init_simple_counter (nm->counters.hairpinning, "hairpinning",
431 : "/nat44-ei/hairpinning");
432 :
433 559 : p = hash_get_mem (tm->thread_registrations_by_name, "workers");
434 559 : if (p)
435 : {
436 559 : tr = (vlib_thread_registration_t *) p[0];
437 559 : if (tr)
438 : {
439 559 : nm->num_workers = tr->count;
440 559 : nm->first_worker_index = tr->first_index;
441 : }
442 : }
443 559 : num_threads = tm->n_vlib_mains - 1;
444 559 : nm->port_per_thread = 0xffff - 1024;
445 559 : vec_validate (nm->per_thread_data, num_threads);
446 :
447 : /* Use all available workers by default */
448 559 : if (nm->num_workers > 1)
449 : {
450 46 : for (i = 0; i < nm->num_workers; i++)
451 32 : bitmap = clib_bitmap_set (bitmap, i, 1);
452 14 : nat44_ei_set_workers (bitmap);
453 14 : clib_bitmap_free (bitmap);
454 : }
455 : else
456 : {
457 545 : nm->per_thread_data[0].snat_thread_index = 0;
458 : }
459 :
460 : /* callbacks to call when interface address changes. */
461 559 : cbi.function = nat44_ei_ip4_add_del_interface_address_cb;
462 559 : vec_add1 (nm->ip4_main->add_del_interface_address_callbacks, cbi);
463 559 : cbi.function = nat44_ei_ip4_add_del_addr_only_sm_cb;
464 559 : vec_add1 (nm->ip4_main->add_del_interface_address_callbacks, cbi);
465 :
466 : /* callbacks to call when interface to table biding changes */
467 559 : cbt.function = nat44_ei_update_outside_fib;
468 559 : vec_add1 (nm->ip4_main->table_bind_callbacks, cbt);
469 :
470 559 : nm->fib_src_low = fib_source_allocate (
471 : "nat44-ei-low", FIB_SOURCE_PRIORITY_LOW, FIB_SOURCE_BH_SIMPLE);
472 559 : nm->fib_src_hi = fib_source_allocate ("nat44-ei-hi", FIB_SOURCE_PRIORITY_HI,
473 : FIB_SOURCE_BH_SIMPLE);
474 :
475 : // used only by out2in-dpo feature
476 559 : nat_dpo_module_init ();
477 559 : nat_ha_init (vm, nm->num_workers, num_threads);
478 :
479 559 : nm->hairpinning_fq_index =
480 559 : vlib_frame_queue_main_init (nat44_ei_hairpinning_node.index, 0);
481 559 : nm->in2out_hairpinning_finish_ip4_lookup_node_fq_index =
482 559 : vlib_frame_queue_main_init (
483 : nat44_ei_in2out_hairpinning_finish_ip4_lookup_node.index, 0);
484 559 : nm->in2out_hairpinning_finish_interface_output_node_fq_index =
485 559 : vlib_frame_queue_main_init (
486 : nat44_ei_in2out_hairpinning_finish_interface_output_node.index, 0);
487 559 : return nat44_ei_api_hookup (vm);
488 : }
489 :
490 1119 : VLIB_INIT_FUNCTION (nat44_ei_init);
491 :
492 : int
493 58 : nat44_ei_plugin_enable (nat44_ei_config_t c)
494 : {
495 58 : nat44_ei_main_t *nm = &nat44_ei_main;
496 :
497 58 : fail_if_enabled ();
498 :
499 58 : if (!c.users)
500 0 : c.users = 1024;
501 :
502 58 : if (!c.sessions)
503 0 : c.sessions = 10 * 1024;
504 :
505 58 : if (!c.user_sessions)
506 58 : c.user_sessions = c.sessions;
507 :
508 58 : nm->rconfig = c;
509 :
510 58 : if (!nm->frame_queue_nelts)
511 2 : nm->frame_queue_nelts = NAT_FQ_NELTS_DEFAULT;
512 :
513 58 : nm->translations = c.sessions;
514 58 : nm->translation_buckets = nat_calc_bihash_buckets (c.sessions);
515 58 : nm->user_buckets = nat_calc_bihash_buckets (c.users);
516 :
517 58 : nm->pat = (!c.static_mapping_only ||
518 0 : (c.static_mapping_only && c.connection_tracking));
519 :
520 58 : nm->static_mapping_only = c.static_mapping_only;
521 58 : nm->static_mapping_connection_tracking = c.connection_tracking;
522 58 : nm->out2in_dpo = c.out2in_dpo;
523 58 : nm->forwarding_enabled = 0;
524 58 : nm->mss_clamping = 0;
525 :
526 58 : nm->max_users_per_thread = c.users;
527 58 : nm->max_translations_per_thread = c.sessions;
528 58 : nm->max_translations_per_user = c.user_sessions;
529 :
530 58 : nm->inside_vrf_id = c.inside_vrf;
531 116 : nm->inside_fib_index = fib_table_find_or_create_and_lock (
532 58 : FIB_PROTOCOL_IP4, c.inside_vrf, nm->fib_src_hi);
533 :
534 58 : nm->outside_vrf_id = c.outside_vrf;
535 116 : nm->outside_fib_index = fib_table_find_or_create_and_lock (
536 58 : FIB_PROTOCOL_IP4, c.outside_vrf, nm->fib_src_hi);
537 :
538 58 : nat_reset_timeouts (&nm->timeouts);
539 58 : nat44_ei_db_init (nm->translations, nm->translation_buckets,
540 : nm->user_buckets);
541 58 : nat44_ei_set_alloc_default ();
542 :
543 58 : vlib_zero_simple_counter (&nm->total_users, 0);
544 58 : vlib_zero_simple_counter (&nm->total_sessions, 0);
545 58 : vlib_zero_simple_counter (&nm->user_limit_reached, 0);
546 :
547 58 : if (nm->num_workers > 1)
548 : {
549 2 : if (nm->fq_in2out_index == ~0)
550 : {
551 1 : nm->fq_in2out_index = vlib_frame_queue_main_init (
552 : nm->in2out_node_index, nm->frame_queue_nelts);
553 : }
554 2 : if (nm->fq_out2in_index == ~0)
555 : {
556 1 : nm->fq_out2in_index = vlib_frame_queue_main_init (
557 : nm->out2in_node_index, nm->frame_queue_nelts);
558 : }
559 2 : if (nm->fq_in2out_output_index == ~0)
560 : {
561 1 : nm->fq_in2out_output_index = vlib_frame_queue_main_init (
562 : nm->in2out_output_node_index, nm->frame_queue_nelts);
563 : }
564 : }
565 :
566 58 : nat_ha_enable ();
567 58 : nm->enabled = 1;
568 :
569 58 : return 0;
570 : }
571 :
572 : static_always_inline nat44_ei_outside_fib_t *
573 110 : nat44_ei_get_outside_fib (nat44_ei_outside_fib_t *outside_fibs, u32 fib_index)
574 : {
575 : nat44_ei_outside_fib_t *f;
576 111 : vec_foreach (f, outside_fibs)
577 : {
578 58 : if (f->fib_index == fib_index)
579 : {
580 57 : return f;
581 : }
582 : }
583 53 : return 0;
584 : }
585 :
586 : static_always_inline nat44_ei_interface_t *
587 349 : nat44_ei_get_interface (nat44_ei_interface_t *interfaces, u32 sw_if_index)
588 : {
589 : nat44_ei_interface_t *i;
590 421 : pool_foreach (i, interfaces)
591 : {
592 188 : if (i->sw_if_index == sw_if_index)
593 : {
594 116 : return i;
595 : }
596 : }
597 233 : return 0;
598 : }
599 :
600 : static_always_inline int
601 110 : nat44_ei_hairpinning_enable (u8 is_enable)
602 : {
603 110 : nat44_ei_main_t *nm = &nat44_ei_main;
604 110 : u32 sw_if_index = 0; // local0
605 :
606 110 : if (is_enable)
607 : {
608 55 : nm->hairpin_reg += 1;
609 55 : if (1 == nm->hairpin_reg)
610 : {
611 48 : return vnet_feature_enable_disable (
612 : "ip4-local", "nat44-ei-hairpinning", sw_if_index, is_enable, 0, 0);
613 : }
614 : }
615 : else
616 : {
617 55 : if (0 == nm->hairpin_reg)
618 0 : return 1;
619 :
620 55 : nm->hairpin_reg -= 1;
621 55 : if (0 == nm->hairpin_reg)
622 : {
623 48 : return vnet_feature_enable_disable (
624 : "ip4-local", "nat44-ei-hairpinning", sw_if_index, is_enable, 0, 0);
625 : }
626 : }
627 :
628 14 : return 0;
629 : }
630 :
631 : int
632 106 : nat44_ei_add_interface (u32 sw_if_index, u8 is_inside)
633 : {
634 : const char *feature_name, *del_feature_name;
635 106 : nat44_ei_main_t *nm = &nat44_ei_main;
636 :
637 : nat44_ei_outside_fib_t *outside_fib;
638 : nat44_ei_interface_t *i;
639 : u32 fib_index;
640 : int rv;
641 :
642 106 : fail_if_disabled ();
643 :
644 106 : if (nm->out2in_dpo && !is_inside)
645 : {
646 0 : nat44_ei_log_err ("error unsupported");
647 0 : return VNET_API_ERROR_UNSUPPORTED;
648 : }
649 :
650 106 : if (nat44_ei_get_interface (nm->output_feature_interfaces, sw_if_index))
651 : {
652 0 : nat44_ei_log_err ("error interface already configured");
653 0 : return VNET_API_ERROR_VALUE_EXIST;
654 : }
655 :
656 106 : i = nat44_ei_get_interface (nm->interfaces, sw_if_index);
657 106 : if (i)
658 : {
659 2 : if ((nat44_ei_interface_is_inside (i) && is_inside) ||
660 2 : (nat44_ei_interface_is_outside (i) && !is_inside))
661 : {
662 0 : return 0;
663 : }
664 1 : if (nm->num_workers > 1)
665 : {
666 0 : del_feature_name = !is_inside ? "nat44-ei-in2out-worker-handoff" :
667 : "nat44-ei-out2in-worker-handoff";
668 0 : feature_name = "nat44-ei-handoff-classify";
669 : }
670 : else
671 : {
672 1 : del_feature_name =
673 : !is_inside ? "nat44-ei-in2out" : "nat44-ei-out2in";
674 :
675 1 : feature_name = "nat44-ei-classify";
676 : }
677 :
678 1 : rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1);
679 1 : if (rv)
680 : {
681 0 : return rv;
682 : }
683 1 : rv = vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
684 : sw_if_index, 0, 0, 0);
685 1 : if (rv)
686 : {
687 0 : return rv;
688 : }
689 1 : rv = vnet_feature_enable_disable ("ip4-unicast", feature_name,
690 : sw_if_index, 1, 0, 0);
691 1 : if (rv)
692 : {
693 0 : return rv;
694 : }
695 1 : if (!is_inside)
696 : {
697 0 : rv = nat44_ei_hairpinning_enable (0);
698 0 : if (rv)
699 : {
700 0 : return rv;
701 : }
702 : }
703 : }
704 : else
705 : {
706 105 : if (nm->num_workers > 1)
707 : {
708 4 : feature_name = is_inside ? "nat44-ei-in2out-worker-handoff" :
709 : "nat44-ei-out2in-worker-handoff";
710 : }
711 : else
712 : {
713 101 : feature_name = is_inside ? "nat44-ei-in2out" : "nat44-ei-out2in";
714 : }
715 105 : nat_validate_interface_counters (nm, sw_if_index);
716 :
717 105 : rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1);
718 105 : if (rv)
719 : {
720 0 : return rv;
721 : }
722 105 : rv = vnet_feature_enable_disable ("ip4-unicast", feature_name,
723 : sw_if_index, 1, 0, 0);
724 105 : if (rv)
725 : {
726 0 : return rv;
727 : }
728 105 : if (is_inside && !nm->out2in_dpo)
729 : {
730 55 : rv = nat44_ei_hairpinning_enable (1);
731 55 : if (rv)
732 : {
733 0 : return rv;
734 : }
735 : }
736 :
737 105 : pool_get (nm->interfaces, i);
738 105 : i->sw_if_index = sw_if_index;
739 105 : i->flags = 0;
740 : }
741 :
742 : fib_index =
743 106 : fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index);
744 :
745 106 : if (!is_inside)
746 : {
747 50 : i->flags |= NAT44_EI_INTERFACE_FLAG_IS_OUTSIDE;
748 :
749 50 : outside_fib = nat44_ei_get_outside_fib (nm->outside_fibs, fib_index);
750 50 : if (outside_fib)
751 : {
752 0 : outside_fib->refcount++;
753 : }
754 : else
755 : {
756 50 : vec_add2 (nm->outside_fibs, outside_fib, 1);
757 50 : outside_fib->fib_index = fib_index;
758 50 : outside_fib->refcount = 1;
759 : }
760 :
761 50 : nat44_ei_add_del_addr_to_fib_foreach_addr (sw_if_index, 1);
762 50 : nat44_ei_add_del_addr_to_fib_foreach_addr_only_sm (sw_if_index, 1);
763 : }
764 : else
765 : {
766 56 : i->flags |= NAT44_EI_INTERFACE_FLAG_IS_INSIDE;
767 : }
768 :
769 106 : return 0;
770 : }
771 :
772 : int
773 106 : nat44_ei_del_interface (u32 sw_if_index, u8 is_inside)
774 : {
775 : const char *feature_name, *del_feature_name;
776 106 : nat44_ei_main_t *nm = &nat44_ei_main;
777 :
778 : nat44_ei_outside_fib_t *outside_fib;
779 : nat44_ei_interface_t *i;
780 : u32 fib_index;
781 : int rv;
782 :
783 106 : fail_if_disabled ();
784 :
785 106 : if (nm->out2in_dpo && !is_inside)
786 : {
787 0 : nat44_ei_log_err ("error unsupported");
788 0 : return VNET_API_ERROR_UNSUPPORTED;
789 : }
790 :
791 106 : i = nat44_ei_get_interface (nm->interfaces, sw_if_index);
792 106 : if (i == 0)
793 : {
794 0 : nat44_ei_log_err ("error interface couldn't be found");
795 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
796 : }
797 :
798 106 : if (nat44_ei_interface_is_inside (i) && nat44_ei_interface_is_outside (i))
799 : {
800 1 : if (nm->num_workers > 1)
801 : {
802 0 : del_feature_name = "nat44-ei-handoff-classify";
803 0 : feature_name = !is_inside ? "nat44-ei-in2out-worker-handoff" :
804 : "nat44-ei-out2in-worker-handoff";
805 : }
806 : else
807 : {
808 1 : del_feature_name = "nat44-ei-classify";
809 1 : feature_name = !is_inside ? "nat44-ei-in2out" : "nat44-ei-out2in";
810 : }
811 :
812 1 : rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0);
813 1 : if (rv)
814 : {
815 0 : return rv;
816 : }
817 1 : rv = vnet_feature_enable_disable ("ip4-unicast", del_feature_name,
818 : sw_if_index, 0, 0, 0);
819 1 : if (rv)
820 : {
821 0 : return rv;
822 : }
823 1 : rv = vnet_feature_enable_disable ("ip4-unicast", feature_name,
824 : sw_if_index, 1, 0, 0);
825 1 : if (rv)
826 : {
827 0 : return rv;
828 : }
829 1 : if (is_inside)
830 : {
831 1 : i->flags &= ~NAT44_EI_INTERFACE_FLAG_IS_INSIDE;
832 : }
833 : else
834 : {
835 0 : rv = nat44_ei_hairpinning_enable (1);
836 0 : if (rv)
837 : {
838 0 : return rv;
839 : }
840 0 : i->flags &= ~NAT44_EI_INTERFACE_FLAG_IS_OUTSIDE;
841 : }
842 : }
843 : else
844 : {
845 105 : if (nm->num_workers > 1)
846 : {
847 4 : feature_name = is_inside ? "nat44-ei-in2out-worker-handoff" :
848 : "nat44-ei-out2in-worker-handoff";
849 : }
850 : else
851 : {
852 101 : feature_name = is_inside ? "nat44-ei-in2out" : "nat44-ei-out2in";
853 : }
854 :
855 105 : rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0);
856 105 : if (rv)
857 : {
858 0 : return rv;
859 : }
860 105 : rv = vnet_feature_enable_disable ("ip4-unicast", feature_name,
861 : sw_if_index, 0, 0, 0);
862 105 : if (rv)
863 : {
864 0 : return rv;
865 : }
866 105 : if (is_inside)
867 : {
868 55 : rv = nat44_ei_hairpinning_enable (0);
869 55 : if (rv)
870 : {
871 0 : return rv;
872 : }
873 : }
874 :
875 : // remove interface
876 105 : pool_put (nm->interfaces, i);
877 : }
878 :
879 106 : if (!is_inside)
880 : {
881 : fib_index =
882 50 : fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index);
883 50 : outside_fib = nat44_ei_get_outside_fib (nm->outside_fibs, fib_index);
884 50 : if (outside_fib)
885 : {
886 50 : outside_fib->refcount--;
887 50 : if (!outside_fib->refcount)
888 : {
889 48 : vec_del1 (nm->outside_fibs, outside_fib - nm->outside_fibs);
890 : }
891 : }
892 :
893 50 : nat44_ei_add_del_addr_to_fib_foreach_addr (sw_if_index, 0);
894 50 : nat44_ei_add_del_addr_to_fib_foreach_addr_only_sm (sw_if_index, 0);
895 : }
896 :
897 106 : return 0;
898 : }
899 :
900 : int
901 5 : nat44_ei_add_output_interface (u32 sw_if_index)
902 : {
903 5 : nat44_ei_main_t *nm = &nat44_ei_main;
904 :
905 : nat44_ei_outside_fib_t *outside_fib;
906 : nat44_ei_interface_t *i;
907 : u32 fib_index;
908 : int rv;
909 :
910 5 : fail_if_disabled ();
911 :
912 5 : if (nat44_ei_get_interface (nm->interfaces, sw_if_index))
913 : {
914 0 : nat44_ei_log_err ("error interface already configured");
915 0 : return VNET_API_ERROR_VALUE_EXIST;
916 : }
917 :
918 5 : if (nat44_ei_get_interface (nm->output_feature_interfaces, sw_if_index))
919 : {
920 0 : nat44_ei_log_err ("error interface already configured");
921 0 : return VNET_API_ERROR_VALUE_EXIST;
922 : }
923 :
924 5 : if (nm->num_workers > 1)
925 : {
926 0 : rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1);
927 0 : if (rv)
928 : {
929 0 : return rv;
930 : }
931 0 : rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 1);
932 0 : if (rv)
933 : {
934 0 : return rv;
935 : }
936 0 : rv = vnet_feature_enable_disable (
937 : "ip4-unicast", "nat44-ei-out2in-worker-handoff", sw_if_index, 1, 0, 0);
938 0 : if (rv)
939 : {
940 0 : return rv;
941 : }
942 0 : rv = vnet_feature_enable_disable (
943 : "ip4-output", "nat44-ei-in2out-output-worker-handoff", sw_if_index, 1,
944 : 0, 0);
945 0 : if (rv)
946 : {
947 0 : return rv;
948 : }
949 : }
950 : else
951 : {
952 5 : rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1);
953 5 : if (rv)
954 : {
955 0 : return rv;
956 : }
957 5 : rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 1);
958 5 : if (rv)
959 : {
960 0 : return rv;
961 : }
962 5 : rv = vnet_feature_enable_disable ("ip4-unicast", "nat44-ei-out2in",
963 : sw_if_index, 1, 0, 0);
964 5 : if (rv)
965 : {
966 0 : return rv;
967 : }
968 5 : rv = vnet_feature_enable_disable ("ip4-output", "nat44-ei-in2out-output",
969 : sw_if_index, 1, 0, 0);
970 5 : if (rv)
971 : {
972 0 : return rv;
973 : }
974 : }
975 :
976 5 : nat_validate_interface_counters (nm, sw_if_index);
977 :
978 5 : pool_get (nm->output_feature_interfaces, i);
979 5 : i->sw_if_index = sw_if_index;
980 5 : i->flags = 0;
981 5 : i->flags |= NAT44_EI_INTERFACE_FLAG_IS_INSIDE;
982 5 : i->flags |= NAT44_EI_INTERFACE_FLAG_IS_OUTSIDE;
983 :
984 : fib_index =
985 5 : fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index);
986 5 : outside_fib = nat44_ei_get_outside_fib (nm->outside_fibs, fib_index);
987 5 : if (outside_fib)
988 : {
989 2 : outside_fib->refcount++;
990 : }
991 : else
992 : {
993 3 : vec_add2 (nm->outside_fibs, outside_fib, 1);
994 3 : outside_fib->fib_index = fib_index;
995 3 : outside_fib->refcount = 1;
996 : }
997 :
998 5 : nat44_ei_add_del_addr_to_fib_foreach_addr (sw_if_index, 1);
999 5 : nat44_ei_add_del_addr_to_fib_foreach_addr_only_sm (sw_if_index, 1);
1000 :
1001 5 : return 0;
1002 : }
1003 :
1004 : int
1005 5 : nat44_ei_del_output_interface (u32 sw_if_index)
1006 : {
1007 5 : nat44_ei_main_t *nm = &nat44_ei_main;
1008 :
1009 : nat44_ei_outside_fib_t *outside_fib;
1010 : nat44_ei_interface_t *i;
1011 : u32 fib_index;
1012 : int rv;
1013 :
1014 5 : fail_if_disabled ();
1015 :
1016 5 : i = nat44_ei_get_interface (nm->output_feature_interfaces, sw_if_index);
1017 5 : if (!i)
1018 : {
1019 0 : nat44_ei_log_err ("error interface couldn't be found");
1020 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
1021 : }
1022 :
1023 5 : if (nm->num_workers > 1)
1024 : {
1025 0 : rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0);
1026 0 : if (rv)
1027 : {
1028 0 : return rv;
1029 : }
1030 0 : rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 0);
1031 0 : if (rv)
1032 : {
1033 0 : return rv;
1034 : }
1035 0 : rv = vnet_feature_enable_disable (
1036 : "ip4-unicast", "nat44-ei-out2in-worker-handoff", sw_if_index, 0, 0, 0);
1037 0 : if (rv)
1038 : {
1039 0 : return rv;
1040 : }
1041 0 : rv = vnet_feature_enable_disable (
1042 : "ip4-output", "nat44-ei-in2out-output-worker-handoff", sw_if_index, 0,
1043 : 0, 0);
1044 0 : if (rv)
1045 : {
1046 0 : return rv;
1047 : }
1048 : }
1049 : else
1050 : {
1051 5 : rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0);
1052 5 : if (rv)
1053 : {
1054 0 : return rv;
1055 : }
1056 5 : rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 0);
1057 5 : if (rv)
1058 : {
1059 0 : return rv;
1060 : }
1061 5 : rv = vnet_feature_enable_disable ("ip4-unicast", "nat44-ei-out2in",
1062 : sw_if_index, 0, 0, 0);
1063 5 : if (rv)
1064 : {
1065 0 : return rv;
1066 : }
1067 5 : rv = vnet_feature_enable_disable ("ip4-output", "nat44-ei-in2out-output",
1068 : sw_if_index, 0, 0, 0);
1069 5 : if (rv)
1070 : {
1071 0 : return rv;
1072 : }
1073 : }
1074 :
1075 5 : pool_put (nm->output_feature_interfaces, i);
1076 :
1077 : fib_index =
1078 5 : fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index);
1079 5 : outside_fib = nat44_ei_get_outside_fib (nm->outside_fibs, fib_index);
1080 5 : if (outside_fib)
1081 : {
1082 5 : outside_fib->refcount--;
1083 5 : if (!outside_fib->refcount)
1084 : {
1085 4 : vec_del1 (nm->outside_fibs, outside_fib - nm->outside_fibs);
1086 : }
1087 : }
1088 :
1089 5 : nat44_ei_add_del_addr_to_fib_foreach_addr (sw_if_index, 0);
1090 5 : nat44_ei_add_del_addr_to_fib_foreach_addr_only_sm (sw_if_index, 0);
1091 :
1092 5 : return 0;
1093 : }
1094 :
1095 : int
1096 0 : nat44_ei_add_del_output_interface (u32 sw_if_index, int is_del)
1097 : {
1098 0 : if (is_del)
1099 : {
1100 0 : return nat44_ei_del_output_interface (sw_if_index);
1101 : }
1102 : else
1103 : {
1104 0 : return nat44_ei_add_output_interface (sw_if_index);
1105 : }
1106 : }
1107 :
1108 : int
1109 58 : nat44_ei_del_addresses ()
1110 : {
1111 58 : nat44_ei_main_t *nm = &nat44_ei_main;
1112 : nat44_ei_address_t *a, *vec;
1113 58 : int error = 0;
1114 :
1115 58 : vec = vec_dup (nm->addresses);
1116 198 : vec_foreach (a, vec)
1117 : {
1118 140 : error = nat44_ei_del_address (a->addr, 0);
1119 :
1120 140 : if (error)
1121 : {
1122 0 : nat44_ei_log_err ("error occurred while removing adderess");
1123 : }
1124 : }
1125 58 : vec_free (vec);
1126 58 : vec_free (nm->addresses);
1127 58 : nm->addresses = 0;
1128 :
1129 58 : vec_free (nm->auto_add_sw_if_indices);
1130 58 : nm->auto_add_sw_if_indices = 0;
1131 58 : return error;
1132 : }
1133 :
1134 : int
1135 58 : nat44_ei_del_interfaces ()
1136 : {
1137 58 : nat44_ei_main_t *nm = &nat44_ei_main;
1138 : nat44_ei_interface_t *i, *pool;
1139 58 : int error = 0;
1140 :
1141 58 : pool = pool_dup (nm->interfaces);
1142 160 : pool_foreach (i, pool)
1143 : {
1144 102 : if (nat44_ei_interface_is_inside (i))
1145 : {
1146 54 : error = nat44_ei_del_interface (i->sw_if_index, 1);
1147 : }
1148 102 : if (nat44_ei_interface_is_outside (i))
1149 : {
1150 49 : error = nat44_ei_del_interface (i->sw_if_index, 0);
1151 : }
1152 :
1153 102 : if (error)
1154 : {
1155 0 : nat44_ei_log_err ("error occurred while removing interface");
1156 : }
1157 : }
1158 58 : pool_free (pool);
1159 58 : pool_free (nm->interfaces);
1160 58 : nm->interfaces = 0;
1161 58 : return error;
1162 : }
1163 :
1164 : int
1165 58 : nat44_ei_del_output_interfaces ()
1166 : {
1167 58 : nat44_ei_main_t *nm = &nat44_ei_main;
1168 : nat44_ei_interface_t *i, *pool;
1169 58 : int error = 0;
1170 :
1171 58 : pool = pool_dup (nm->output_feature_interfaces);
1172 62 : pool_foreach (i, pool)
1173 : {
1174 4 : error = nat44_ei_del_output_interface (i->sw_if_index);
1175 4 : if (error)
1176 : {
1177 0 : nat44_ei_log_err ("error occurred while removing output interface");
1178 : }
1179 : }
1180 58 : pool_free (pool);
1181 58 : pool_free (nm->output_feature_interfaces);
1182 58 : nm->output_feature_interfaces = 0;
1183 58 : return error;
1184 : }
1185 :
1186 : static clib_error_t *
1187 11597 : nat44_ei_sw_interface_add_del (vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
1188 : {
1189 11597 : nat44_ei_main_t *nm = &nat44_ei_main;
1190 : nat44_ei_interface_t *i;
1191 11597 : int error = 0;
1192 :
1193 11597 : if (is_add)
1194 7418 : return 0;
1195 :
1196 4179 : if (!nm->enabled)
1197 4171 : return 0;
1198 :
1199 8 : i = nat44_ei_get_interface (nm->interfaces, sw_if_index);
1200 8 : if (i)
1201 : {
1202 3 : bool is_inside = nat44_ei_interface_is_inside (i);
1203 3 : bool is_outside = nat44_ei_interface_is_outside (i);
1204 :
1205 3 : if (is_inside)
1206 : {
1207 2 : error |= nat44_ei_del_interface (sw_if_index, 1);
1208 : }
1209 3 : if (is_outside)
1210 : {
1211 1 : error |= nat44_ei_del_interface (sw_if_index, 0);
1212 : }
1213 :
1214 3 : if (error)
1215 : {
1216 0 : nat44_ei_log_err ("error occurred while removing interface");
1217 : }
1218 : }
1219 :
1220 8 : i = nat44_ei_get_interface (nm->output_feature_interfaces, sw_if_index);
1221 8 : if (i)
1222 : {
1223 1 : error = nat44_ei_del_output_interface (sw_if_index);
1224 1 : if (error)
1225 : {
1226 0 : nat44_ei_log_err ("error occurred while removing output interface");
1227 : }
1228 : }
1229 :
1230 8 : return 0;
1231 : }
1232 :
1233 1119 : VNET_SW_INTERFACE_ADD_DEL_FUNCTION (nat44_ei_sw_interface_add_del);
1234 :
1235 : int
1236 58 : nat44_ei_del_static_mappings ()
1237 : {
1238 58 : nat44_ei_main_t *nm = &nat44_ei_main;
1239 : nat44_ei_static_mapping_t *m, *pool;
1240 58 : int error = 0;
1241 :
1242 58 : pool = pool_dup (nm->static_mappings);
1243 91 : pool_foreach (m, pool)
1244 : {
1245 33 : error = nat44_ei_del_static_mapping_internal (
1246 33 : m->local_addr, m->external_addr, m->local_port, m->external_port,
1247 : m->proto, m->vrf_id, ~0, m->flags);
1248 33 : if (error)
1249 : {
1250 0 : nat44_ei_log_err ("error occurred while removing mapping");
1251 : }
1252 : }
1253 58 : pool_free (pool);
1254 58 : pool_free (nm->static_mappings);
1255 58 : nm->static_mappings = 0;
1256 :
1257 58 : vec_free (nm->to_resolve);
1258 58 : nm->to_resolve = 0;
1259 :
1260 58 : clib_bihash_free_8_8 (&nm->static_mapping_by_local);
1261 58 : clib_bihash_free_8_8 (&nm->static_mapping_by_external);
1262 :
1263 58 : return error;
1264 : }
1265 :
1266 : int
1267 58 : nat44_ei_plugin_disable ()
1268 : {
1269 58 : nat44_ei_main_t *nm = &nat44_ei_main;
1270 : nat44_ei_main_per_thread_data_t *tnm;
1271 58 : int rc, error = 0;
1272 :
1273 58 : fail_if_disabled ();
1274 :
1275 58 : nat_ha_disable ();
1276 :
1277 58 : rc = nat44_ei_del_static_mappings ();
1278 58 : if (rc)
1279 0 : error = VNET_API_ERROR_BUG;
1280 :
1281 58 : rc = nat44_ei_del_addresses ();
1282 58 : if (rc)
1283 0 : error = VNET_API_ERROR_BUG;
1284 :
1285 58 : rc = nat44_ei_del_interfaces ();
1286 58 : if (rc)
1287 0 : error = VNET_API_ERROR_BUG;
1288 :
1289 58 : rc = nat44_ei_del_output_interfaces ();
1290 58 : if (rc)
1291 0 : error = VNET_API_ERROR_BUG;
1292 :
1293 58 : if (nm->pat)
1294 : {
1295 58 : clib_bihash_free_8_8 (&nm->in2out);
1296 58 : clib_bihash_free_8_8 (&nm->out2in);
1297 :
1298 120 : vec_foreach (tnm, nm->per_thread_data)
1299 : {
1300 62 : nat44_ei_worker_db_free (tnm);
1301 : }
1302 : }
1303 :
1304 58 : clib_memset (&nm->rconfig, 0, sizeof (nm->rconfig));
1305 :
1306 58 : nm->forwarding_enabled = 0;
1307 58 : nm->enabled = 0;
1308 :
1309 58 : return error;
1310 : }
1311 :
1312 : int
1313 2 : nat44_ei_set_outside_address_and_port (nat44_ei_address_t *addresses,
1314 : u32 thread_index, ip4_address_t addr,
1315 : u16 port, nat_protocol_t protocol)
1316 : {
1317 2 : nat44_ei_address_t *a = 0;
1318 : u32 address_index;
1319 2 : u16 port_host_byte_order = clib_net_to_host_u16 (port);
1320 :
1321 2 : for (address_index = 0; address_index < vec_len (addresses); address_index++)
1322 : {
1323 2 : if (addresses[address_index].addr.as_u32 != addr.as_u32)
1324 0 : continue;
1325 :
1326 2 : a = addresses + address_index;
1327 2 : if (nat44_ei_port_is_used (a, protocol, port_host_byte_order))
1328 0 : return VNET_API_ERROR_INSTANCE_IN_USE;
1329 :
1330 2 : nat44_ei_port_get (a, protocol, port_host_byte_order);
1331 2 : a->busy_ports_per_thread[protocol][thread_index]++;
1332 2 : a->busy_ports[protocol]++;
1333 2 : return 0;
1334 : }
1335 :
1336 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
1337 : }
1338 :
1339 : void
1340 0 : nat44_ei_add_del_address_dpo (ip4_address_t addr, u8 is_add)
1341 : {
1342 0 : nat44_ei_main_t *nm = &nat44_ei_main;
1343 0 : dpo_id_t dpo_v4 = DPO_INVALID;
1344 0 : fib_prefix_t pfx = {
1345 : .fp_proto = FIB_PROTOCOL_IP4,
1346 : .fp_len = 32,
1347 0 : .fp_addr.ip4.as_u32 = addr.as_u32,
1348 : };
1349 :
1350 0 : if (is_add)
1351 : {
1352 0 : nat_dpo_create (DPO_PROTO_IP4, 0, &dpo_v4);
1353 0 : fib_table_entry_special_dpo_add (0, &pfx, nm->fib_src_hi,
1354 : FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4);
1355 0 : dpo_reset (&dpo_v4);
1356 : }
1357 : else
1358 : {
1359 0 : fib_table_entry_special_remove (0, &pfx, nm->fib_src_hi);
1360 : }
1361 0 : }
1362 :
1363 : void
1364 10435 : nat44_ei_free_outside_address_and_port (nat44_ei_address_t *addresses,
1365 : u32 thread_index, ip4_address_t *addr,
1366 : u16 port, nat_protocol_t protocol)
1367 : {
1368 : nat44_ei_address_t *a;
1369 : u32 address_index;
1370 10435 : u16 port_host_byte_order = clib_net_to_host_u16 (port);
1371 :
1372 12861 : for (address_index = 0; address_index < vec_len (addresses); address_index++)
1373 : {
1374 12861 : if (addresses[address_index].addr.as_u32 == addr->as_u32)
1375 10435 : break;
1376 : }
1377 :
1378 10435 : ASSERT (address_index < vec_len (addresses));
1379 :
1380 10435 : a = addresses + address_index;
1381 10435 : nat44_ei_port_put (a, protocol, port_host_byte_order);
1382 10435 : a->busy_ports[protocol]--;
1383 10435 : a->busy_ports_per_thread[protocol][thread_index]--;
1384 10435 : }
1385 :
1386 : void
1387 57 : nat44_ei_free_session_data_v2 (nat44_ei_main_t *nm, nat44_ei_session_t *s,
1388 : u32 thread_index, u8 is_ha)
1389 : {
1390 : clib_bihash_kv_8_8_t kv;
1391 :
1392 : /* session lookup tables */
1393 57 : init_nat_i2o_k (&kv, s);
1394 57 : if (clib_bihash_add_del_8_8 (&nm->in2out, &kv, 0))
1395 0 : nat_elog_warn (nm, "in2out key del failed");
1396 57 : init_nat_o2i_k (&kv, s);
1397 57 : if (clib_bihash_add_del_8_8 (&nm->out2in, &kv, 0))
1398 0 : nat_elog_warn (nm, "out2in key del failed");
1399 :
1400 57 : if (!is_ha)
1401 56 : nat_syslog_nat44_apmdel (s->user_index, s->in2out.fib_index,
1402 56 : &s->in2out.addr, s->in2out.port, &s->out2in.addr,
1403 56 : s->out2in.port, s->nat_proto);
1404 :
1405 57 : if (nat44_ei_is_unk_proto_session (s))
1406 49 : return;
1407 :
1408 57 : if (!is_ha)
1409 : {
1410 : /* log NAT event */
1411 56 : nat_ipfix_logging_nat44_ses_delete (
1412 : thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32,
1413 56 : nat_proto_to_ip_proto (s->nat_proto), s->in2out.port, s->out2in.port,
1414 : s->in2out.fib_index);
1415 :
1416 56 : nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
1417 56 : s->ext_host_port, s->nat_proto, s->out2in.fib_index,
1418 : thread_index);
1419 : }
1420 :
1421 57 : if (nat44_ei_is_session_static (s))
1422 49 : return;
1423 :
1424 8 : nat44_ei_free_outside_address_and_port (nm->addresses, thread_index,
1425 8 : &s->out2in.addr, s->out2in.port,
1426 : s->nat_proto);
1427 : }
1428 :
1429 : nat44_ei_user_t *
1430 10487 : nat44_ei_user_get_or_create (nat44_ei_main_t *nm, ip4_address_t *addr,
1431 : u32 fib_index, u32 thread_index)
1432 : {
1433 10487 : nat44_ei_user_t *u = 0;
1434 : nat44_ei_user_key_t user_key;
1435 : clib_bihash_kv_8_8_t kv, value;
1436 10487 : nat44_ei_main_per_thread_data_t *tnm = &nm->per_thread_data[thread_index];
1437 : dlist_elt_t *per_user_list_head_elt;
1438 :
1439 10487 : user_key.addr.as_u32 = addr->as_u32;
1440 10487 : user_key.fib_index = fib_index;
1441 10487 : kv.key = user_key.as_u64;
1442 :
1443 : /* Ever heard of the "user" = src ip4 address before? */
1444 10487 : if (clib_bihash_search_8_8 (&tnm->user_hash, &kv, &value))
1445 : {
1446 10396 : if (pool_elts (tnm->users) >= nm->max_users_per_thread)
1447 : {
1448 0 : vlib_increment_simple_counter (&nm->user_limit_reached, thread_index,
1449 : 0, 1);
1450 0 : nat_elog_warn (nm, "maximum user limit reached");
1451 0 : return NULL;
1452 : }
1453 : /* no, make a new one */
1454 10396 : pool_get (tnm->users, u);
1455 10396 : clib_memset (u, 0, sizeof (*u));
1456 :
1457 10396 : u->addr.as_u32 = addr->as_u32;
1458 10396 : u->fib_index = fib_index;
1459 :
1460 10396 : pool_get (tnm->list_pool, per_user_list_head_elt);
1461 :
1462 10396 : u->sessions_per_user_list_head_index =
1463 10396 : per_user_list_head_elt - tnm->list_pool;
1464 :
1465 10396 : clib_dlist_init (tnm->list_pool, u->sessions_per_user_list_head_index);
1466 :
1467 10396 : kv.value = u - tnm->users;
1468 :
1469 : /* add user */
1470 10396 : if (clib_bihash_add_del_8_8 (&tnm->user_hash, &kv, 1))
1471 : {
1472 0 : nat_elog_warn (nm, "user_hash key add failed");
1473 0 : nat44_ei_delete_user_with_no_session (nm, u, thread_index);
1474 0 : return NULL;
1475 : }
1476 :
1477 10396 : vlib_set_simple_counter (&nm->total_users, thread_index, 0,
1478 10396 : pool_elts (tnm->users));
1479 : }
1480 : else
1481 : {
1482 91 : u = pool_elt_at_index (tnm->users, value.value);
1483 : }
1484 :
1485 10487 : return u;
1486 : }
1487 :
1488 : nat44_ei_session_t *
1489 10487 : nat44_ei_session_alloc_or_recycle (nat44_ei_main_t *nm, nat44_ei_user_t *u,
1490 : u32 thread_index, f64 now)
1491 : {
1492 : nat44_ei_session_t *s;
1493 10487 : nat44_ei_main_per_thread_data_t *tnm = &nm->per_thread_data[thread_index];
1494 : u32 oldest_per_user_translation_list_index, session_index;
1495 : dlist_elt_t *oldest_per_user_translation_list_elt;
1496 : dlist_elt_t *per_user_translation_list_elt;
1497 :
1498 : /* Over quota? Recycle the least recently used translation */
1499 10487 : if ((u->nsessions + u->nstaticsessions) >= nm->max_translations_per_user)
1500 : {
1501 0 : oldest_per_user_translation_list_index = clib_dlist_remove_head (
1502 : tnm->list_pool, u->sessions_per_user_list_head_index);
1503 :
1504 0 : ASSERT (oldest_per_user_translation_list_index != ~0);
1505 :
1506 : /* Add it back to the end of the LRU list */
1507 0 : clib_dlist_addtail (tnm->list_pool, u->sessions_per_user_list_head_index,
1508 : oldest_per_user_translation_list_index);
1509 : /* Get the list element */
1510 0 : oldest_per_user_translation_list_elt = pool_elt_at_index (
1511 : tnm->list_pool, oldest_per_user_translation_list_index);
1512 :
1513 : /* Get the session index from the list element */
1514 0 : session_index = oldest_per_user_translation_list_elt->value;
1515 :
1516 : /* Get the session */
1517 0 : s = pool_elt_at_index (tnm->sessions, session_index);
1518 :
1519 0 : nat44_ei_free_session_data_v2 (nm, s, thread_index, 0);
1520 0 : if (nat44_ei_is_session_static (s))
1521 0 : u->nstaticsessions--;
1522 : else
1523 0 : u->nsessions--;
1524 0 : s->flags = 0;
1525 0 : s->total_bytes = 0;
1526 0 : s->total_pkts = 0;
1527 0 : s->state = 0;
1528 0 : s->ext_host_addr.as_u32 = 0;
1529 0 : s->ext_host_port = 0;
1530 0 : s->ext_host_nat_addr.as_u32 = 0;
1531 0 : s->ext_host_nat_port = 0;
1532 : }
1533 : else
1534 : {
1535 10487 : pool_get (tnm->sessions, s);
1536 10487 : clib_memset (s, 0, sizeof (*s));
1537 :
1538 : /* Create list elts */
1539 10487 : pool_get (tnm->list_pool, per_user_translation_list_elt);
1540 10487 : clib_dlist_init (tnm->list_pool,
1541 10487 : per_user_translation_list_elt - tnm->list_pool);
1542 :
1543 10487 : per_user_translation_list_elt->value = s - tnm->sessions;
1544 10487 : s->per_user_index = per_user_translation_list_elt - tnm->list_pool;
1545 10487 : s->per_user_list_head_index = u->sessions_per_user_list_head_index;
1546 :
1547 10487 : clib_dlist_addtail (tnm->list_pool, s->per_user_list_head_index,
1548 10487 : per_user_translation_list_elt - tnm->list_pool);
1549 :
1550 10487 : s->user_index = u - tnm->users;
1551 10487 : vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
1552 10487 : pool_elts (tnm->sessions));
1553 : }
1554 :
1555 10487 : s->ha_last_refreshed = now;
1556 :
1557 10487 : return s;
1558 : }
1559 :
1560 : void
1561 10427 : nat44_ei_free_session_data (nat44_ei_main_t *nm, nat44_ei_session_t *s,
1562 : u32 thread_index, u8 is_ha)
1563 : {
1564 : clib_bihash_kv_8_8_t kv;
1565 :
1566 10427 : init_nat_i2o_k (&kv, s);
1567 10427 : if (clib_bihash_add_del_8_8 (&nm->in2out, &kv, 0))
1568 0 : nat_elog_warn (nm, "in2out key del failed");
1569 :
1570 10427 : init_nat_o2i_k (&kv, s);
1571 10427 : if (clib_bihash_add_del_8_8 (&nm->out2in, &kv, 0))
1572 0 : nat_elog_warn (nm, "out2in key del failed");
1573 :
1574 10427 : if (!is_ha)
1575 : {
1576 10427 : nat_syslog_nat44_apmdel (s->user_index, s->in2out.fib_index,
1577 10427 : &s->in2out.addr, s->in2out.port,
1578 10427 : &s->out2in.addr, s->out2in.port, s->nat_proto);
1579 :
1580 10427 : nat_ipfix_logging_nat44_ses_delete (
1581 : thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32,
1582 10427 : nat_proto_to_ip_proto (s->nat_proto), s->in2out.port, s->out2in.port,
1583 : s->in2out.fib_index);
1584 :
1585 10427 : nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
1586 10427 : s->ext_host_port, s->nat_proto, s->out2in.fib_index,
1587 : thread_index);
1588 : }
1589 :
1590 10427 : if (nat44_ei_is_session_static (s))
1591 0 : return;
1592 :
1593 10427 : nat44_ei_free_outside_address_and_port (nm->addresses, thread_index,
1594 10427 : &s->out2in.addr, s->out2in.port,
1595 : s->nat_proto);
1596 : }
1597 :
1598 : static_always_inline void
1599 0 : nat44_ei_user_del_sessions (nat44_ei_user_t *u, u32 thread_index)
1600 : {
1601 : dlist_elt_t *elt;
1602 : nat44_ei_session_t *s;
1603 :
1604 0 : nat44_ei_main_t *nm = &nat44_ei_main;
1605 0 : nat44_ei_main_per_thread_data_t *tnm = &nm->per_thread_data[thread_index];
1606 :
1607 : // get head
1608 0 : elt =
1609 0 : pool_elt_at_index (tnm->list_pool, u->sessions_per_user_list_head_index);
1610 : // get first element
1611 0 : elt = pool_elt_at_index (tnm->list_pool, elt->next);
1612 :
1613 0 : while (elt->value != ~0)
1614 : {
1615 0 : s = pool_elt_at_index (tnm->sessions, elt->value);
1616 0 : elt = pool_elt_at_index (tnm->list_pool, elt->next);
1617 :
1618 0 : nat44_ei_free_session_data (nm, s, thread_index, 0);
1619 0 : nat44_ei_delete_session (nm, s, thread_index);
1620 : }
1621 0 : }
1622 :
1623 : int
1624 0 : nat44_ei_user_del (ip4_address_t *addr, u32 fib_index)
1625 : {
1626 0 : int rv = 1;
1627 :
1628 0 : nat44_ei_main_t *nm = &nat44_ei_main;
1629 : nat44_ei_main_per_thread_data_t *tnm;
1630 :
1631 : nat44_ei_user_key_t user_key;
1632 : clib_bihash_kv_8_8_t kv, value;
1633 :
1634 0 : user_key.addr.as_u32 = addr->as_u32;
1635 0 : user_key.fib_index = fib_index;
1636 0 : kv.key = user_key.as_u64;
1637 :
1638 0 : if (nm->num_workers > 1)
1639 : {
1640 0 : vec_foreach (tnm, nm->per_thread_data)
1641 : {
1642 0 : if (!clib_bihash_search_8_8 (&tnm->user_hash, &kv, &value))
1643 : {
1644 0 : nat44_ei_user_del_sessions (
1645 0 : pool_elt_at_index (tnm->users, value.value),
1646 : tnm->thread_index);
1647 0 : rv = 0;
1648 0 : break;
1649 : }
1650 : }
1651 : }
1652 : else
1653 : {
1654 0 : tnm = vec_elt_at_index (nm->per_thread_data, nm->num_workers);
1655 0 : if (!clib_bihash_search_8_8 (&tnm->user_hash, &kv, &value))
1656 : {
1657 0 : nat44_ei_user_del_sessions (
1658 0 : pool_elt_at_index (tnm->users, value.value), tnm->thread_index);
1659 0 : rv = 0;
1660 : }
1661 : }
1662 0 : return rv;
1663 : }
1664 :
1665 : void
1666 38 : nat44_ei_static_mapping_del_sessions (nat44_ei_main_t *nm,
1667 : nat44_ei_main_per_thread_data_t *tnm,
1668 : nat44_ei_user_key_t u_key, int addr_only,
1669 : ip4_address_t e_addr, u16 e_port)
1670 : {
1671 : clib_bihash_kv_8_8_t kv, value;
1672 38 : kv.key = u_key.as_u64;
1673 : u64 user_index;
1674 : dlist_elt_t *head, *elt;
1675 : nat44_ei_user_t *u;
1676 : nat44_ei_session_t *s;
1677 : u32 elt_index, head_index, ses_index;
1678 :
1679 38 : if (!clib_bihash_search_8_8 (&tnm->user_hash, &kv, &value))
1680 : {
1681 25 : user_index = value.value;
1682 25 : u = pool_elt_at_index (tnm->users, user_index);
1683 25 : if (u->nstaticsessions)
1684 : {
1685 25 : head_index = u->sessions_per_user_list_head_index;
1686 25 : head = pool_elt_at_index (tnm->list_pool, head_index);
1687 25 : elt_index = head->next;
1688 25 : elt = pool_elt_at_index (tnm->list_pool, elt_index);
1689 25 : ses_index = elt->value;
1690 61 : while (ses_index != ~0)
1691 : {
1692 49 : s = pool_elt_at_index (tnm->sessions, ses_index);
1693 49 : elt = pool_elt_at_index (tnm->list_pool, elt->next);
1694 49 : ses_index = elt->value;
1695 :
1696 49 : if (!addr_only)
1697 : {
1698 13 : if ((s->out2in.addr.as_u32 != e_addr.as_u32) ||
1699 13 : (s->out2in.port != e_port))
1700 0 : continue;
1701 : }
1702 :
1703 49 : if (!nat44_ei_is_session_static (s))
1704 0 : continue;
1705 :
1706 49 : nat44_ei_free_session_data_v2 (nm, s, tnm - nm->per_thread_data,
1707 : 0);
1708 49 : nat44_ei_delete_session (nm, s, tnm - nm->per_thread_data);
1709 :
1710 49 : if (!addr_only)
1711 13 : break;
1712 : }
1713 : }
1714 : }
1715 38 : }
1716 :
1717 : u32
1718 17 : nat44_ei_get_in2out_worker_index (ip4_header_t *ip0, u32 rx_fib_index0,
1719 : u8 is_output)
1720 : {
1721 17 : nat44_ei_main_t *nm = &nat44_ei_main;
1722 17 : u32 next_worker_index = 0;
1723 : u32 hash;
1724 :
1725 17 : next_worker_index = nm->first_worker_index;
1726 17 : hash = ip0->src_address.as_u32 + (ip0->src_address.as_u32 >> 8) +
1727 17 : (ip0->src_address.as_u32 >> 16) + (ip0->src_address.as_u32 >> 24);
1728 :
1729 17 : if (PREDICT_TRUE (is_pow2 (_vec_len (nm->workers))))
1730 17 : next_worker_index += nm->workers[hash & (_vec_len (nm->workers) - 1)];
1731 : else
1732 0 : next_worker_index += nm->workers[hash % _vec_len (nm->workers)];
1733 :
1734 17 : return next_worker_index;
1735 : }
1736 :
1737 : u32
1738 32 : nat44_ei_get_thread_idx_by_port (u16 e_port)
1739 : {
1740 32 : nat44_ei_main_t *nm = &nat44_ei_main;
1741 32 : u32 thread_idx = nm->num_workers;
1742 32 : if (nm->num_workers > 1)
1743 : {
1744 4 : thread_idx = nm->first_worker_index +
1745 2 : nm->workers[(e_port - 1024) / nm->port_per_thread %
1746 2 : _vec_len (nm->workers)];
1747 : }
1748 32 : return thread_idx;
1749 : }
1750 :
1751 : u32
1752 0 : nat44_ei_get_out2in_worker_index (vlib_buffer_t *b, ip4_header_t *ip0,
1753 : u32 rx_fib_index0, u8 is_output)
1754 : {
1755 0 : nat44_ei_main_t *nm = &nat44_ei_main;
1756 : udp_header_t *udp;
1757 : u16 port;
1758 : clib_bihash_kv_8_8_t kv, value;
1759 : nat44_ei_static_mapping_t *m;
1760 : u32 proto;
1761 0 : u32 next_worker_index = 0;
1762 :
1763 : /* first try static mappings without port */
1764 0 : if (PREDICT_FALSE (pool_elts (nm->static_mappings)))
1765 : {
1766 0 : init_nat_k (&kv, ip0->dst_address, 0, rx_fib_index0, 0);
1767 0 : if (!clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv,
1768 : &value))
1769 : {
1770 0 : m = pool_elt_at_index (nm->static_mappings, value.value);
1771 0 : return m->workers[0];
1772 : }
1773 : }
1774 :
1775 0 : proto = ip_proto_to_nat_proto (ip0->protocol);
1776 0 : udp = ip4_next_header (ip0);
1777 0 : port = vnet_buffer (b)->ip.reass.l4_dst_port;
1778 :
1779 : /* unknown protocol */
1780 0 : if (PREDICT_FALSE (proto == NAT_PROTOCOL_OTHER))
1781 : {
1782 : /* use current thread */
1783 0 : return vlib_get_thread_index ();
1784 : }
1785 :
1786 0 : if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_ICMP))
1787 : {
1788 0 : icmp46_header_t *icmp = (icmp46_header_t *) udp;
1789 0 : icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
1790 0 : if (!icmp_type_is_error_message (
1791 0 : vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
1792 0 : port = vnet_buffer (b)->ip.reass.l4_src_port;
1793 : else
1794 : {
1795 : /* if error message, then it's not fragmented and we can access it */
1796 0 : ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
1797 0 : proto = ip_proto_to_nat_proto (inner_ip->protocol);
1798 0 : void *l4_header = ip4_next_header (inner_ip);
1799 0 : switch (proto)
1800 : {
1801 0 : case NAT_PROTOCOL_ICMP:
1802 0 : icmp = (icmp46_header_t *) l4_header;
1803 0 : echo = (icmp_echo_header_t *) (icmp + 1);
1804 0 : port = echo->identifier;
1805 0 : break;
1806 0 : case NAT_PROTOCOL_UDP:
1807 : case NAT_PROTOCOL_TCP:
1808 0 : port = ((tcp_udp_header_t *) l4_header)->src_port;
1809 0 : break;
1810 0 : default:
1811 0 : return vlib_get_thread_index ();
1812 : }
1813 0 : }
1814 : }
1815 :
1816 : /* try static mappings with port */
1817 0 : if (PREDICT_FALSE (pool_elts (nm->static_mappings)))
1818 : {
1819 0 : init_nat_k (&kv, ip0->dst_address, port, rx_fib_index0, proto);
1820 0 : if (!clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv,
1821 : &value))
1822 : {
1823 0 : m = pool_elt_at_index (nm->static_mappings, value.value);
1824 0 : return m->workers[0];
1825 : }
1826 : }
1827 :
1828 : /* worker by outside port */
1829 : next_worker_index =
1830 0 : nat44_ei_get_thread_idx_by_port (clib_net_to_host_u16 (port));
1831 0 : return next_worker_index;
1832 : }
1833 :
1834 : static int
1835 10437 : nat44_ei_alloc_default_cb (nat44_ei_address_t *addresses, u32 fib_index,
1836 : u32 thread_index, nat_protocol_t proto,
1837 : ip4_address_t s_addr, ip4_address_t *addr,
1838 : u16 *port, u16 port_per_thread,
1839 : u32 snat_thread_index)
1840 : {
1841 10437 : nat44_ei_main_t *nm = &nat44_ei_main;
1842 10437 : nat44_ei_address_t *a, *ga = 0;
1843 : u32 portnum;
1844 : int i;
1845 :
1846 10437 : if (vec_len (addresses) > 0)
1847 : {
1848 10432 : int s_addr_offset = s_addr.as_u32 % vec_len (addresses);
1849 :
1850 25739 : for (i = s_addr_offset; i < vec_len (addresses); ++i)
1851 : {
1852 15319 : a = addresses + i;
1853 :
1854 15319 : if (a->busy_ports_per_thread[proto][thread_index] < port_per_thread)
1855 : {
1856 15319 : if (a->fib_index == fib_index)
1857 : {
1858 : while (1)
1859 : {
1860 24 : portnum = (port_per_thread * snat_thread_index) +
1861 24 : nat_random_port (&nm->random_seed, 0,
1862 12 : port_per_thread - 1) +
1863 : 1024;
1864 12 : if (nat44_ei_port_is_used (a, proto, portnum))
1865 0 : continue;
1866 12 : nat44_ei_port_get (a, proto, portnum);
1867 12 : a->busy_ports_per_thread[proto][thread_index]++;
1868 12 : a->busy_ports[proto]++;
1869 12 : *addr = a->addr;
1870 12 : *port = clib_host_to_net_u16 (portnum);
1871 12 : return 0;
1872 : }
1873 : }
1874 15307 : else if (a->fib_index == ~0)
1875 : {
1876 15295 : ga = a;
1877 : }
1878 : }
1879 : }
1880 :
1881 15345 : for (i = 0; i < s_addr_offset; ++i)
1882 : {
1883 4925 : a = addresses + i;
1884 4925 : if (a->busy_ports_per_thread[proto][thread_index] < port_per_thread)
1885 : {
1886 4925 : if (a->fib_index == fib_index)
1887 : {
1888 : while (1)
1889 : {
1890 0 : portnum = (port_per_thread * snat_thread_index) +
1891 0 : nat_random_port (&nm->random_seed, 0,
1892 0 : port_per_thread - 1) +
1893 : 1024;
1894 0 : if (nat44_ei_port_is_used (a, proto, portnum))
1895 0 : continue;
1896 0 : nat44_ei_port_get (a, proto, portnum);
1897 0 : a->busy_ports_per_thread[proto][thread_index]++;
1898 0 : a->busy_ports[proto]++;
1899 0 : *addr = a->addr;
1900 0 : *port = clib_host_to_net_u16 (portnum);
1901 0 : return 0;
1902 : }
1903 : }
1904 4925 : else if (a->fib_index == ~0)
1905 : {
1906 4925 : ga = a;
1907 : }
1908 : }
1909 : }
1910 :
1911 10420 : if (ga)
1912 : {
1913 10420 : a = ga;
1914 10420 : if (a->busy_ports_per_thread[proto][thread_index] < port_per_thread)
1915 : {
1916 10420 : if (a->fib_index == ~0)
1917 : {
1918 : while (1)
1919 : {
1920 20900 : portnum = (port_per_thread * snat_thread_index) +
1921 20900 : nat_random_port (&nm->random_seed, 0,
1922 10450 : port_per_thread - 1) +
1923 : 1024;
1924 10450 : if (nat44_ei_port_is_used (a, proto, portnum))
1925 30 : continue;
1926 10420 : nat44_ei_port_get (a, proto, portnum);
1927 10420 : a->busy_ports_per_thread[proto][thread_index]++;
1928 10420 : a->busy_ports[proto]++;
1929 10420 : *addr = a->addr;
1930 10420 : *port = clib_host_to_net_u16 (portnum);
1931 10420 : return 0;
1932 : }
1933 : }
1934 : }
1935 : }
1936 : }
1937 :
1938 : /* Totally out of translations to use... */
1939 5 : nat_ipfix_logging_addresses_exhausted (thread_index, 0);
1940 5 : return 1;
1941 : }
1942 :
1943 : static int
1944 5 : nat44_ei_alloc_range_cb (nat44_ei_address_t *addresses, u32 fib_index,
1945 : u32 thread_index, nat_protocol_t proto,
1946 : ip4_address_t s_addr, ip4_address_t *addr, u16 *port,
1947 : u16 port_per_thread, u32 snat_thread_index)
1948 : {
1949 5 : nat44_ei_main_t *nm = &nat44_ei_main;
1950 5 : nat44_ei_address_t *a = addresses;
1951 : u16 portnum, ports;
1952 :
1953 5 : ports = nm->end_port - nm->start_port + 1;
1954 :
1955 5 : if (!vec_len (addresses))
1956 0 : goto exhausted;
1957 :
1958 5 : if (a->busy_ports[proto] < ports)
1959 : {
1960 : while (1)
1961 : {
1962 0 : portnum =
1963 3 : nat_random_port (&nm->random_seed, nm->start_port, nm->end_port);
1964 3 : if (nat44_ei_port_is_used (a, proto, portnum))
1965 0 : continue;
1966 3 : nat44_ei_port_get (a, proto, portnum);
1967 3 : a->busy_ports[proto]++;
1968 3 : *addr = a->addr;
1969 3 : *port = clib_host_to_net_u16 (portnum);
1970 3 : return 0;
1971 : }
1972 : }
1973 :
1974 2 : exhausted:
1975 : /* Totally out of translations to use... */
1976 2 : nat_ipfix_logging_addresses_exhausted (thread_index, 0);
1977 2 : return 1;
1978 : }
1979 :
1980 : static int
1981 1 : nat44_ei_alloc_mape_cb (nat44_ei_address_t *addresses, u32 fib_index,
1982 : u32 thread_index, nat_protocol_t proto,
1983 : ip4_address_t s_addr, ip4_address_t *addr, u16 *port,
1984 : u16 port_per_thread, u32 snat_thread_index)
1985 : {
1986 1 : nat44_ei_main_t *nm = &nat44_ei_main;
1987 1 : nat44_ei_address_t *a = addresses;
1988 : u16 m, ports, portnum, A, j;
1989 1 : m = 16 - (nm->psid_offset + nm->psid_length);
1990 1 : ports = (1 << (16 - nm->psid_length)) - (1 << m);
1991 :
1992 1 : if (!vec_len (addresses))
1993 0 : goto exhausted;
1994 :
1995 1 : if (a->busy_ports[proto] < ports)
1996 : {
1997 : while (1)
1998 : {
1999 0 : A =
2000 1 : nat_random_port (&nm->random_seed, 1, pow2_mask (nm->psid_offset));
2001 1 : j = nat_random_port (&nm->random_seed, 0, pow2_mask (m));
2002 1 : portnum = A | (nm->psid << nm->psid_offset) | (j << (16 - m));
2003 1 : if (nat44_ei_port_is_used (a, proto, portnum))
2004 0 : continue;
2005 1 : nat44_ei_port_get (a, proto, portnum);
2006 1 : a->busy_ports[proto]++;
2007 1 : *addr = a->addr;
2008 1 : *port = clib_host_to_net_u16 (portnum);
2009 1 : return 0;
2010 : }
2011 : }
2012 :
2013 0 : exhausted:
2014 : /* Totally out of translations to use... */
2015 0 : nat_ipfix_logging_addresses_exhausted (thread_index, 0);
2016 0 : return 1;
2017 : }
2018 :
2019 : void
2020 58 : nat44_ei_set_alloc_default ()
2021 : {
2022 58 : nat44_ei_main_t *nm = &nat44_ei_main;
2023 :
2024 58 : nm->addr_and_port_alloc_alg = NAT44_EI_ADDR_AND_PORT_ALLOC_ALG_DEFAULT;
2025 58 : nm->alloc_addr_and_port = nat44_ei_alloc_default_cb;
2026 58 : }
2027 :
2028 : void
2029 1 : nat44_ei_set_alloc_range (u16 start_port, u16 end_port)
2030 : {
2031 1 : nat44_ei_main_t *nm = &nat44_ei_main;
2032 :
2033 1 : nm->addr_and_port_alloc_alg = NAT44_EI_ADDR_AND_PORT_ALLOC_ALG_RANGE;
2034 1 : nm->alloc_addr_and_port = nat44_ei_alloc_range_cb;
2035 1 : nm->start_port = start_port;
2036 1 : nm->end_port = end_port;
2037 1 : }
2038 :
2039 : void
2040 1 : nat44_ei_set_alloc_mape (u16 psid, u16 psid_offset, u16 psid_length)
2041 : {
2042 1 : nat44_ei_main_t *nm = &nat44_ei_main;
2043 :
2044 1 : nm->addr_and_port_alloc_alg = NAT44_EI_ADDR_AND_PORT_ALLOC_ALG_MAPE;
2045 1 : nm->alloc_addr_and_port = nat44_ei_alloc_mape_cb;
2046 1 : nm->psid = psid;
2047 1 : nm->psid_offset = psid_offset;
2048 1 : nm->psid_length = psid_length;
2049 1 : }
2050 :
2051 : void
2052 10484 : nat44_ei_delete_session (nat44_ei_main_t *nm, nat44_ei_session_t *ses,
2053 : u32 thread_index)
2054 : {
2055 10484 : nat44_ei_main_per_thread_data_t *tnm =
2056 10484 : vec_elt_at_index (nm->per_thread_data, thread_index);
2057 : clib_bihash_kv_8_8_t kv, value;
2058 : nat44_ei_user_t *u;
2059 10484 : const nat44_ei_user_key_t u_key = { .addr = ses->in2out.addr,
2060 10484 : .fib_index = ses->in2out.fib_index };
2061 10484 : const u8 u_static = nat44_ei_is_session_static (ses);
2062 :
2063 10484 : clib_dlist_remove (tnm->list_pool, ses->per_user_index);
2064 10484 : pool_put_index (tnm->list_pool, ses->per_user_index);
2065 :
2066 10484 : pool_put (tnm->sessions, ses);
2067 10484 : vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
2068 10484 : pool_elts (tnm->sessions));
2069 :
2070 10484 : kv.key = u_key.as_u64;
2071 10484 : if (!clib_bihash_search_8_8 (&tnm->user_hash, &kv, &value))
2072 : {
2073 10484 : u = pool_elt_at_index (tnm->users, value.value);
2074 10484 : if (u_static)
2075 49 : u->nstaticsessions--;
2076 : else
2077 10435 : u->nsessions--;
2078 :
2079 10484 : nat44_ei_delete_user_with_no_session (nm, u, thread_index);
2080 : }
2081 10484 : }
2082 :
2083 : int
2084 4 : nat44_ei_del_session (nat44_ei_main_t *nm, ip4_address_t *addr, u16 port,
2085 : nat_protocol_t proto, u32 vrf_id, int is_in)
2086 : {
2087 : nat44_ei_main_per_thread_data_t *tnm;
2088 : clib_bihash_kv_8_8_t kv, value;
2089 : u32 fib_index;
2090 : nat44_ei_session_t *s;
2091 : clib_bihash_8_8_t *t;
2092 :
2093 4 : fail_if_disabled ();
2094 :
2095 4 : fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id);
2096 4 : init_nat_k (&kv, *addr, port, fib_index, proto);
2097 4 : t = is_in ? &nm->in2out : &nm->out2in;
2098 4 : if (!clib_bihash_search_8_8 (t, &kv, &value))
2099 : {
2100 : // this is called from API/CLI, so the world is stopped here
2101 : // it's safe to manipulate arbitrary per-thread data
2102 4 : u32 thread_index = nat_value_get_thread_index (&value);
2103 4 : tnm = vec_elt_at_index (nm->per_thread_data, thread_index);
2104 4 : u32 session_index = nat_value_get_session_index (&value);
2105 4 : if (pool_is_free_index (tnm->sessions, session_index))
2106 0 : return VNET_API_ERROR_UNSPECIFIED;
2107 :
2108 4 : s = pool_elt_at_index (tnm->sessions, session_index);
2109 4 : nat44_ei_free_session_data_v2 (nm, s, tnm - nm->per_thread_data, 0);
2110 4 : nat44_ei_delete_session (nm, s, tnm - nm->per_thread_data);
2111 4 : return 0;
2112 : }
2113 :
2114 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
2115 : }
2116 :
2117 : void
2118 330 : nat44_ei_add_del_addr_to_fib (ip4_address_t *addr, u8 p_len, u32 sw_if_index,
2119 : int is_add)
2120 : {
2121 330 : nat44_ei_main_t *nm = &nat44_ei_main;
2122 330 : fib_prefix_t prefix = {
2123 : .fp_len = p_len,
2124 : .fp_proto = FIB_PROTOCOL_IP4,
2125 : .fp_addr = {
2126 330 : .ip4.as_u32 = addr->as_u32,
2127 : },
2128 : };
2129 330 : u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
2130 :
2131 330 : if (is_add)
2132 : {
2133 165 : fib_table_entry_update_one_path (fib_index, &prefix, nm->fib_src_low,
2134 : (FIB_ENTRY_FLAG_CONNECTED |
2135 : FIB_ENTRY_FLAG_LOCAL |
2136 : FIB_ENTRY_FLAG_EXCLUSIVE),
2137 : DPO_PROTO_IP4, NULL, sw_if_index, ~0, 1,
2138 : NULL, FIB_ROUTE_PATH_FLAG_NONE);
2139 : }
2140 : else
2141 : {
2142 165 : fib_table_entry_delete (fib_index, &prefix, nm->fib_src_low);
2143 : }
2144 330 : }
2145 :
2146 : int
2147 16 : nat44_ei_reserve_port (ip4_address_t addr, u16 port, nat_protocol_t proto)
2148 : {
2149 16 : u32 ti = nat44_ei_get_thread_idx_by_port (port);
2150 16 : nat44_ei_main_t *nm = &nat44_ei_main;
2151 16 : nat44_ei_address_t *a = 0;
2152 : int i;
2153 :
2154 16 : for (i = 0; i < vec_len (nm->addresses); i++)
2155 : {
2156 16 : a = nm->addresses + i;
2157 :
2158 16 : if (a->addr.as_u32 != addr.as_u32)
2159 0 : continue;
2160 :
2161 16 : if (nat44_ei_port_is_used (a, proto, port))
2162 0 : continue;
2163 :
2164 16 : nat44_ei_port_get (a, proto, port);
2165 16 : if (port > 1024)
2166 : {
2167 16 : a->busy_ports[proto]++;
2168 16 : a->busy_ports_per_thread[proto][ti]++;
2169 : }
2170 16 : return 0;
2171 : }
2172 :
2173 0 : return 1;
2174 : }
2175 :
2176 : int
2177 16 : nat44_ei_free_port (ip4_address_t addr, u16 port, nat_protocol_t proto)
2178 : {
2179 16 : u32 ti = nat44_ei_get_thread_idx_by_port (port);
2180 16 : nat44_ei_main_t *nm = &nat44_ei_main;
2181 16 : nat44_ei_address_t *a = 0;
2182 : int i;
2183 :
2184 16 : for (i = 0; i < vec_len (nm->addresses); i++)
2185 : {
2186 16 : a = nm->addresses + i;
2187 :
2188 16 : if (a->addr.as_u32 != addr.as_u32)
2189 0 : continue;
2190 :
2191 16 : nat44_ei_port_put (a, proto, port);
2192 16 : if (port > 1024)
2193 : {
2194 16 : a->busy_ports[proto]--;
2195 16 : a->busy_ports_per_thread[proto][ti]--;
2196 : }
2197 16 : return 0;
2198 : }
2199 :
2200 0 : return 1;
2201 : }
2202 :
2203 : void
2204 2 : nat44_ei_add_resolve_record (ip4_address_t l_addr, u16 l_port, u16 e_port,
2205 : nat_protocol_t proto, u32 vrf_id, u32 sw_if_index,
2206 : u32 flags, ip4_address_t pool_addr, u8 *tag)
2207 : {
2208 : nat44_ei_static_map_resolve_t *rp;
2209 2 : nat44_ei_main_t *nm = &nat44_ei_main;
2210 :
2211 2 : vec_add2 (nm->to_resolve, rp, 1);
2212 2 : rp->l_addr.as_u32 = l_addr.as_u32;
2213 2 : rp->l_port = l_port;
2214 2 : rp->e_port = e_port;
2215 2 : rp->sw_if_index = sw_if_index;
2216 2 : rp->vrf_id = vrf_id;
2217 2 : rp->proto = proto;
2218 2 : rp->flags = flags;
2219 2 : rp->pool_addr = pool_addr;
2220 2 : rp->tag = vec_dup (tag);
2221 2 : }
2222 :
2223 : int
2224 3 : nat44_ei_get_resolve_record (ip4_address_t l_addr, u16 l_port, u16 e_port,
2225 : nat_protocol_t proto, u32 vrf_id, u32 sw_if_index,
2226 : u32 flags, int *out)
2227 : {
2228 : nat44_ei_static_map_resolve_t *rp;
2229 3 : nat44_ei_main_t *nm = &nat44_ei_main;
2230 : int i;
2231 :
2232 3 : for (i = 0; i < vec_len (nm->to_resolve); i++)
2233 : {
2234 1 : rp = nm->to_resolve + i;
2235 :
2236 1 : if (rp->sw_if_index == sw_if_index && rp->vrf_id == vrf_id)
2237 : {
2238 1 : if (is_sm_identity_nat (rp->flags) && is_sm_identity_nat (flags))
2239 : {
2240 0 : if (!(is_sm_addr_only (rp->flags) && is_sm_addr_only (flags)))
2241 : {
2242 0 : if (rp->e_port != e_port || rp->proto != proto)
2243 : {
2244 0 : continue;
2245 : }
2246 : }
2247 : }
2248 1 : else if (rp->l_addr.as_u32 == l_addr.as_u32)
2249 : {
2250 1 : if (!(is_sm_addr_only (rp->flags) && is_sm_addr_only (flags)))
2251 : {
2252 0 : if (rp->l_port != l_port || rp->e_port != e_port ||
2253 0 : rp->proto != proto)
2254 : {
2255 0 : continue;
2256 : }
2257 : }
2258 : }
2259 : else
2260 : {
2261 0 : continue;
2262 : }
2263 1 : if (out)
2264 : {
2265 1 : *out = i;
2266 : }
2267 1 : return 0;
2268 : }
2269 : }
2270 2 : return 1;
2271 : }
2272 :
2273 : int
2274 1 : nat44_ei_del_resolve_record (ip4_address_t l_addr, u16 l_port, u16 e_port,
2275 : nat_protocol_t proto, u32 vrf_id, u32 sw_if_index,
2276 : u32 flags)
2277 : {
2278 1 : nat44_ei_main_t *nm = &nat44_ei_main;
2279 : int i;
2280 1 : if (!nat44_ei_get_resolve_record (l_addr, l_port, e_port, proto, vrf_id,
2281 : sw_if_index, flags, &i))
2282 : {
2283 1 : vec_del1 (nm->to_resolve, i);
2284 1 : return 0;
2285 : }
2286 0 : return 1;
2287 : }
2288 :
2289 : void
2290 38 : delete_matching_dynamic_sessions (const nat44_ei_static_mapping_t *m,
2291 : u32 worker_index)
2292 : {
2293 38 : nat44_ei_main_t *nm = &nat44_ei_main;
2294 : clib_bihash_kv_8_8_t kv, value;
2295 : nat44_ei_session_t *s;
2296 : nat44_ei_user_key_t u_key;
2297 : nat44_ei_user_t *u;
2298 : nat44_ei_main_per_thread_data_t *tnm;
2299 : dlist_elt_t *head, *elt;
2300 : u32 elt_index, head_index;
2301 : u32 ses_index;
2302 : u64 user_index;
2303 :
2304 38 : if (nm->static_mapping_only)
2305 0 : return;
2306 :
2307 38 : tnm = vec_elt_at_index (nm->per_thread_data, worker_index);
2308 :
2309 38 : u_key.addr = m->local_addr;
2310 38 : u_key.fib_index = m->fib_index;
2311 38 : kv.key = u_key.as_u64;
2312 38 : if (!clib_bihash_search_8_8 (&tnm->user_hash, &kv, &value))
2313 : {
2314 1 : user_index = value.value;
2315 1 : u = pool_elt_at_index (tnm->users, user_index);
2316 1 : if (u->nsessions)
2317 : {
2318 1 : head_index = u->sessions_per_user_list_head_index;
2319 1 : head = pool_elt_at_index (tnm->list_pool, head_index);
2320 1 : elt_index = head->next;
2321 1 : elt = pool_elt_at_index (tnm->list_pool, elt_index);
2322 1 : ses_index = elt->value;
2323 4 : while (ses_index != ~0)
2324 : {
2325 3 : s = pool_elt_at_index (tnm->sessions, ses_index);
2326 3 : elt = pool_elt_at_index (tnm->list_pool, elt->next);
2327 3 : ses_index = elt->value;
2328 :
2329 3 : if (nat44_ei_is_session_static (s))
2330 0 : continue;
2331 :
2332 3 : if (!is_sm_addr_only (m->flags) &&
2333 0 : s->in2out.port != m->local_port)
2334 0 : continue;
2335 :
2336 3 : nat44_ei_free_session_data_v2 (nm, s, tnm - nm->per_thread_data,
2337 : 0);
2338 3 : nat44_ei_delete_session (nm, s, tnm - nm->per_thread_data);
2339 :
2340 3 : if (!is_sm_addr_only (m->flags))
2341 0 : break;
2342 : }
2343 : }
2344 : }
2345 : }
2346 :
2347 : int
2348 38 : nat44_ei_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
2349 : u16 l_port, u16 e_port, nat_protocol_t proto,
2350 : u32 vrf_id, u32 sw_if_index, u32 flags,
2351 : ip4_address_t pool_addr, u8 *tag)
2352 :
2353 : {
2354 38 : nat44_ei_main_t *nm = &nat44_ei_main;
2355 :
2356 38 : if (is_sm_switch_address (flags))
2357 : {
2358 2 : if (!nat44_ei_get_resolve_record (l_addr, l_port, e_port, proto, vrf_id,
2359 : sw_if_index, flags, 0))
2360 : {
2361 0 : return VNET_API_ERROR_VALUE_EXIST;
2362 : }
2363 :
2364 2 : nat44_ei_add_resolve_record (l_addr, l_port, e_port, proto, vrf_id,
2365 : sw_if_index, flags, pool_addr, tag);
2366 :
2367 : ip4_address_t *first_int_addr =
2368 2 : ip4_interface_first_address (nm->ip4_main, sw_if_index, 0);
2369 2 : if (!first_int_addr)
2370 : {
2371 : // dhcp resolution required
2372 2 : return 0;
2373 : }
2374 :
2375 0 : e_addr.as_u32 = first_int_addr->as_u32;
2376 : }
2377 :
2378 36 : return nat44_ei_add_static_mapping_internal (l_addr, e_addr, l_port, e_port,
2379 : proto, vrf_id, sw_if_index,
2380 : flags, pool_addr, tag);
2381 : }
2382 :
2383 : int
2384 3 : nat44_ei_del_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
2385 : u16 l_port, u16 e_port, nat_protocol_t proto,
2386 : u32 vrf_id, u32 sw_if_index, u32 flags)
2387 : {
2388 3 : nat44_ei_main_t *nm = &nat44_ei_main;
2389 :
2390 3 : if (is_sm_switch_address (flags))
2391 : {
2392 :
2393 1 : if (nat44_ei_del_resolve_record (l_addr, l_port, e_port, proto, vrf_id,
2394 : sw_if_index, flags))
2395 : {
2396 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
2397 : }
2398 :
2399 : ip4_address_t *first_int_addr =
2400 1 : ip4_interface_first_address (nm->ip4_main, sw_if_index, 0);
2401 1 : if (!first_int_addr)
2402 : {
2403 : // dhcp resolution required
2404 0 : return 0;
2405 : }
2406 :
2407 1 : e_addr.as_u32 = first_int_addr->as_u32;
2408 : }
2409 :
2410 3 : return nat44_ei_del_static_mapping_internal (
2411 : l_addr, e_addr, l_port, e_port, proto, vrf_id, sw_if_index, flags);
2412 : }
2413 :
2414 : static int
2415 39 : nat44_ei_add_static_mapping_internal (ip4_address_t l_addr,
2416 : ip4_address_t e_addr, u16 l_port,
2417 : u16 e_port, nat_protocol_t proto,
2418 : u32 vrf_id, u32 sw_if_index, u32 flags,
2419 : ip4_address_t pool_addr, u8 *tag)
2420 : {
2421 39 : nat44_ei_main_t *nm = &nat44_ei_main;
2422 : clib_bihash_kv_8_8_t kv, value;
2423 : nat44_ei_lb_addr_port_t *local;
2424 : nat44_ei_static_mapping_t *m;
2425 39 : u32 fib_index = ~0;
2426 : u32 worker_index;
2427 :
2428 39 : fail_if_disabled ();
2429 :
2430 39 : if (is_sm_addr_only (flags))
2431 : {
2432 23 : e_port = l_port = proto = 0;
2433 : }
2434 :
2435 39 : if (is_sm_identity_nat (flags))
2436 : {
2437 3 : l_port = e_port;
2438 3 : l_addr.as_u32 = e_addr.as_u32;
2439 : }
2440 :
2441 : // fib index 0
2442 39 : init_nat_k (&kv, e_addr, e_port, 0, proto);
2443 :
2444 39 : if (!clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv, &value))
2445 : {
2446 1 : m = pool_elt_at_index (nm->static_mappings, value.value);
2447 1 : if (!is_sm_identity_nat (m->flags))
2448 : {
2449 0 : return VNET_API_ERROR_VALUE_EXIST;
2450 : }
2451 :
2452 : // case:
2453 : // adding local identity nat record for different vrf table
2454 2 : pool_foreach (local, m->locals)
2455 : {
2456 1 : if (local->vrf_id == vrf_id)
2457 : {
2458 0 : return VNET_API_ERROR_VALUE_EXIST;
2459 : }
2460 : }
2461 :
2462 1 : pool_get (m->locals, local);
2463 :
2464 1 : local->vrf_id = vrf_id;
2465 2 : local->fib_index = fib_table_find_or_create_and_lock (
2466 1 : FIB_PROTOCOL_IP4, vrf_id, nm->fib_src_low);
2467 :
2468 1 : init_nat_kv (&kv, m->local_addr, m->local_port, local->fib_index,
2469 1 : m->proto, 0, m - nm->static_mappings);
2470 1 : clib_bihash_add_del_8_8 (&nm->static_mapping_by_local, &kv, 1);
2471 :
2472 1 : return 0;
2473 : }
2474 :
2475 38 : if (vrf_id != ~0)
2476 : {
2477 38 : fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
2478 38 : nm->fib_src_low);
2479 : }
2480 : else
2481 : {
2482 : // fallback to default vrf
2483 0 : vrf_id = nm->inside_vrf_id;
2484 0 : fib_index = nm->inside_fib_index;
2485 0 : fib_table_lock (fib_index, FIB_PROTOCOL_IP4, nm->fib_src_low);
2486 : }
2487 :
2488 38 : if (!is_sm_identity_nat (flags))
2489 : {
2490 36 : init_nat_k (&kv, l_addr, l_port, fib_index, proto);
2491 36 : if (!clib_bihash_search_8_8 (&nm->static_mapping_by_local, &kv, &value))
2492 : {
2493 0 : return VNET_API_ERROR_VALUE_EXIST;
2494 : }
2495 : }
2496 :
2497 38 : if (!(is_sm_addr_only (flags) || nm->static_mapping_only))
2498 : {
2499 16 : if (nat44_ei_reserve_port (e_addr, e_port, proto))
2500 : {
2501 : // remove resolve record
2502 0 : if ((is_sm_switch_address (flags)) && !is_sm_identity_nat (flags))
2503 : {
2504 0 : nat44_ei_del_resolve_record (l_addr, l_port, e_port, proto,
2505 : vrf_id, sw_if_index, flags);
2506 : }
2507 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
2508 : }
2509 : }
2510 :
2511 38 : pool_get (nm->static_mappings, m);
2512 38 : clib_memset (m, 0, sizeof (*m));
2513 :
2514 38 : m->flags = flags;
2515 38 : m->local_addr = l_addr;
2516 38 : m->external_addr = e_addr;
2517 :
2518 38 : m->tag = vec_dup (tag);
2519 :
2520 38 : if (!is_sm_addr_only (flags))
2521 : {
2522 16 : m->local_port = l_port;
2523 16 : m->external_port = e_port;
2524 16 : m->proto = proto;
2525 : }
2526 :
2527 38 : if (is_sm_identity_nat (flags))
2528 : {
2529 2 : pool_get (m->locals, local);
2530 :
2531 2 : local->vrf_id = vrf_id;
2532 2 : local->fib_index = fib_index;
2533 : }
2534 : else
2535 : {
2536 36 : m->vrf_id = vrf_id;
2537 36 : m->fib_index = fib_index;
2538 : }
2539 :
2540 38 : init_nat_kv (&kv, m->local_addr, m->local_port, fib_index, m->proto, 0,
2541 38 : m - nm->static_mappings);
2542 38 : clib_bihash_add_del_8_8 (&nm->static_mapping_by_local, &kv, 1);
2543 :
2544 38 : init_nat_kv (&kv, m->external_addr, m->external_port, 0, m->proto, 0,
2545 38 : m - nm->static_mappings);
2546 38 : clib_bihash_add_del_8_8 (&nm->static_mapping_by_external, &kv, 1);
2547 :
2548 38 : if (nm->num_workers > 1)
2549 : {
2550 : // store worker index for this record
2551 3 : ip4_header_t ip = {
2552 3 : .src_address = m->local_addr,
2553 : };
2554 3 : worker_index = nat44_ei_get_in2out_worker_index (&ip, m->fib_index, 0);
2555 3 : vec_add1 (m->workers, worker_index);
2556 : }
2557 : else
2558 : {
2559 35 : worker_index = nm->num_workers;
2560 : }
2561 38 : delete_matching_dynamic_sessions (m, worker_index);
2562 :
2563 38 : if (is_sm_addr_only (flags))
2564 : {
2565 22 : nat44_ei_add_del_addr_to_fib_foreach_out_if (&e_addr, 1);
2566 : }
2567 :
2568 38 : return 0;
2569 : }
2570 :
2571 : static int
2572 38 : nat44_ei_del_static_mapping_internal (ip4_address_t l_addr,
2573 : ip4_address_t e_addr, u16 l_port,
2574 : u16 e_port, nat_protocol_t proto,
2575 : u32 vrf_id, u32 sw_if_index, u32 flags)
2576 : {
2577 : nat44_ei_main_per_thread_data_t *tnm;
2578 38 : nat44_ei_main_t *nm = &nat44_ei_main;
2579 : clib_bihash_kv_8_8_t kv, value;
2580 : nat44_ei_lb_addr_port_t *local;
2581 : nat44_ei_static_mapping_t *m;
2582 38 : u32 fib_index = ~0;
2583 : nat44_ei_user_key_t u_key;
2584 :
2585 38 : fail_if_disabled ();
2586 :
2587 38 : if (is_sm_addr_only (flags))
2588 : {
2589 22 : e_port = l_port = proto = 0;
2590 : }
2591 :
2592 38 : if (is_sm_identity_nat (flags))
2593 : {
2594 2 : l_port = e_port;
2595 2 : l_addr.as_u32 = e_addr.as_u32;
2596 : }
2597 :
2598 : // fib index 0
2599 38 : init_nat_k (&kv, e_addr, e_port, 0, proto);
2600 :
2601 38 : if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv, &value))
2602 : {
2603 0 : if (is_sm_switch_address (flags))
2604 : {
2605 0 : return 0;
2606 : }
2607 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
2608 : }
2609 :
2610 38 : m = pool_elt_at_index (nm->static_mappings, value.value);
2611 :
2612 38 : if (is_sm_identity_nat (flags))
2613 : {
2614 2 : u8 found = 0;
2615 :
2616 2 : if (vrf_id == ~0)
2617 : {
2618 0 : vrf_id = nm->inside_vrf_id;
2619 : }
2620 :
2621 5 : pool_foreach (local, m->locals)
2622 : {
2623 3 : if (local->vrf_id == vrf_id)
2624 : {
2625 2 : local = pool_elt_at_index (m->locals, local - m->locals);
2626 2 : fib_index = local->fib_index;
2627 2 : pool_put (m->locals, local);
2628 2 : found = 1;
2629 : }
2630 : }
2631 2 : if (!found)
2632 : {
2633 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
2634 : }
2635 : }
2636 : else
2637 : {
2638 36 : fib_index = m->fib_index;
2639 : }
2640 :
2641 38 : if (!(is_sm_addr_only (flags) || nm->static_mapping_only))
2642 : {
2643 16 : if (nat44_ei_free_port (e_addr, e_port, proto))
2644 : {
2645 0 : return VNET_API_ERROR_INVALID_VALUE;
2646 : }
2647 : }
2648 :
2649 38 : init_nat_k (&kv, l_addr, l_port, fib_index, proto);
2650 38 : clib_bihash_add_del_8_8 (&nm->static_mapping_by_local, &kv, 0);
2651 :
2652 38 : if (!nm->static_mapping_only || nm->static_mapping_connection_tracking)
2653 : {
2654 : // delete sessions for static mapping
2655 38 : if (nm->num_workers > 1)
2656 3 : tnm = vec_elt_at_index (nm->per_thread_data, m->workers[0]);
2657 : else
2658 35 : tnm = vec_elt_at_index (nm->per_thread_data, nm->num_workers);
2659 :
2660 38 : u_key.addr = m->local_addr;
2661 38 : u_key.fib_index = fib_index;
2662 38 : kv.key = u_key.as_u64;
2663 38 : nat44_ei_static_mapping_del_sessions (
2664 38 : nm, tnm, u_key, is_sm_addr_only (flags), e_addr, e_port);
2665 : }
2666 :
2667 38 : fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, nm->fib_src_low);
2668 :
2669 38 : if (!pool_elts (m->locals))
2670 : {
2671 : // this is last record remove all required stuff
2672 : // fib_index 0
2673 37 : init_nat_k (&kv, e_addr, e_port, 0, proto);
2674 37 : clib_bihash_add_del_8_8 (&nm->static_mapping_by_external, &kv, 0);
2675 :
2676 37 : vec_free (m->tag);
2677 37 : vec_free (m->workers);
2678 37 : pool_put (nm->static_mappings, m);
2679 :
2680 37 : if (is_sm_addr_only (flags) && !is_sm_identity_nat (flags))
2681 : {
2682 21 : nat44_ei_add_del_addr_to_fib_foreach_out_if (&e_addr, 0);
2683 : }
2684 : }
2685 :
2686 38 : return 0;
2687 : }
2688 :
2689 : int
2690 21007 : nat44_ei_static_mapping_match (ip4_address_t match_addr, u16 match_port,
2691 : u32 match_fib_index,
2692 : nat_protocol_t match_protocol,
2693 : ip4_address_t *mapping_addr, u16 *mapping_port,
2694 : u32 *mapping_fib_index, u8 by_external,
2695 : u8 *is_addr_only, u8 *is_identity_nat)
2696 : {
2697 21007 : nat44_ei_main_t *nm = &nat44_ei_main;
2698 : clib_bihash_kv_8_8_t kv, value;
2699 : nat44_ei_static_mapping_t *m;
2700 : u16 port;
2701 :
2702 21007 : if (by_external)
2703 : {
2704 10532 : init_nat_k (&kv, match_addr, match_port, 0, match_protocol);
2705 10532 : if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv,
2706 : &value))
2707 : {
2708 : /* Try address only mapping */
2709 10516 : init_nat_k (&kv, match_addr, 0, 0, 0);
2710 10516 : if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv,
2711 : &value))
2712 10474 : return 1;
2713 : }
2714 58 : m = pool_elt_at_index (nm->static_mappings, value.value);
2715 :
2716 58 : *mapping_fib_index = m->fib_index;
2717 58 : *mapping_addr = m->local_addr;
2718 58 : port = m->local_port;
2719 : }
2720 : else
2721 : {
2722 10475 : init_nat_k (&kv, match_addr, match_port, match_fib_index,
2723 : match_protocol);
2724 10475 : if (clib_bihash_search_8_8 (&nm->static_mapping_by_local, &kv, &value))
2725 : {
2726 : /* Try address only mapping */
2727 10469 : init_nat_k (&kv, match_addr, 0, match_fib_index, 0);
2728 10469 : if (clib_bihash_search_8_8 (&nm->static_mapping_by_local, &kv,
2729 : &value))
2730 10443 : return 1;
2731 : }
2732 32 : m = pool_elt_at_index (nm->static_mappings, value.value);
2733 :
2734 32 : *mapping_fib_index = nm->outside_fib_index;
2735 32 : *mapping_addr = m->external_addr;
2736 32 : port = m->external_port;
2737 : }
2738 :
2739 : /* Address only mapping doesn't change port */
2740 90 : if (is_sm_addr_only (m->flags))
2741 68 : *mapping_port = match_port;
2742 : else
2743 22 : *mapping_port = port;
2744 :
2745 90 : if (PREDICT_FALSE (is_addr_only != 0))
2746 6 : *is_addr_only = is_sm_addr_only (m->flags);
2747 :
2748 90 : if (PREDICT_FALSE (is_identity_nat != 0))
2749 50 : *is_identity_nat = is_sm_identity_nat (m->flags);
2750 :
2751 90 : return 0;
2752 : }
2753 :
2754 : static void
2755 63 : nat44_ei_worker_db_free (nat44_ei_main_per_thread_data_t *tnm)
2756 : {
2757 63 : pool_free (tnm->list_pool);
2758 63 : pool_free (tnm->lru_pool);
2759 63 : pool_free (tnm->sessions);
2760 63 : pool_free (tnm->users);
2761 :
2762 63 : clib_bihash_free_8_8 (&tnm->user_hash);
2763 63 : }
2764 :
2765 : u8 *
2766 20963 : format_nat44_ei_key (u8 *s, va_list *args)
2767 : {
2768 20963 : u64 key = va_arg (*args, u64);
2769 :
2770 : ip4_address_t addr;
2771 : u16 port;
2772 : nat_protocol_t protocol;
2773 : u32 fib_index;
2774 :
2775 20963 : split_nat_key (key, &addr, &port, &fib_index, &protocol);
2776 :
2777 20963 : s = format (s, "%U proto %U port %d fib %d", format_ip4_address, &addr,
2778 20963 : format_nat_protocol, protocol, clib_net_to_host_u16 (port),
2779 : fib_index);
2780 20963 : return s;
2781 : }
2782 :
2783 : u8 *
2784 10384 : format_nat44_ei_user_kvp (u8 *s, va_list *args)
2785 : {
2786 10384 : clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2787 : nat44_ei_user_key_t k;
2788 :
2789 10384 : k.as_u64 = v->key;
2790 :
2791 10384 : s = format (s, "%U fib %d user-index %llu", format_ip4_address, &k.addr,
2792 : k.fib_index, v->value);
2793 :
2794 10384 : return s;
2795 : }
2796 :
2797 : u8 *
2798 20902 : format_nat44_ei_session_kvp (u8 *s, va_list *args)
2799 : {
2800 20902 : clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2801 :
2802 20902 : s = format (s, "%U thread-index %llu session-index %llu",
2803 : format_nat44_ei_key, v->key, nat_value_get_thread_index (v),
2804 : nat_value_get_session_index (v));
2805 :
2806 20902 : return s;
2807 : }
2808 :
2809 : u8 *
2810 61 : format_nat44_ei_static_mapping_kvp (u8 *s, va_list *args)
2811 : {
2812 61 : clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
2813 :
2814 61 : s = format (s, "%U static-mapping-index %llu", format_nat44_ei_key, v->key,
2815 : v->value);
2816 :
2817 61 : return s;
2818 : }
2819 :
2820 : static void
2821 63 : nat44_ei_worker_db_init (nat44_ei_main_per_thread_data_t *tnm,
2822 : u32 translations, u32 translation_buckets,
2823 : u32 user_buckets)
2824 : {
2825 : dlist_elt_t *head;
2826 :
2827 63 : pool_alloc (tnm->list_pool, translations);
2828 63 : pool_alloc (tnm->lru_pool, translations);
2829 63 : pool_alloc (tnm->sessions, translations);
2830 :
2831 63 : clib_bihash_init_8_8 (&tnm->user_hash, "users", user_buckets, 0);
2832 :
2833 63 : clib_bihash_set_kvp_format_fn_8_8 (&tnm->user_hash,
2834 : format_nat44_ei_user_kvp);
2835 :
2836 63 : pool_get (tnm->lru_pool, head);
2837 63 : tnm->tcp_trans_lru_head_index = head - tnm->lru_pool;
2838 63 : clib_dlist_init (tnm->lru_pool, tnm->tcp_trans_lru_head_index);
2839 :
2840 63 : pool_get (tnm->lru_pool, head);
2841 63 : tnm->tcp_estab_lru_head_index = head - tnm->lru_pool;
2842 63 : clib_dlist_init (tnm->lru_pool, tnm->tcp_estab_lru_head_index);
2843 :
2844 63 : pool_get (tnm->lru_pool, head);
2845 63 : tnm->udp_lru_head_index = head - tnm->lru_pool;
2846 63 : clib_dlist_init (tnm->lru_pool, tnm->udp_lru_head_index);
2847 :
2848 63 : pool_get (tnm->lru_pool, head);
2849 63 : tnm->icmp_lru_head_index = head - tnm->lru_pool;
2850 63 : clib_dlist_init (tnm->lru_pool, tnm->icmp_lru_head_index);
2851 :
2852 63 : pool_get (tnm->lru_pool, head);
2853 63 : tnm->unk_proto_lru_head_index = head - tnm->lru_pool;
2854 63 : clib_dlist_init (tnm->lru_pool, tnm->unk_proto_lru_head_index);
2855 63 : }
2856 :
2857 : static void
2858 58 : nat44_ei_db_init (u32 translations, u32 translation_buckets, u32 user_buckets)
2859 : {
2860 58 : nat44_ei_main_t *nm = &nat44_ei_main;
2861 : nat44_ei_main_per_thread_data_t *tnm;
2862 :
2863 58 : u32 static_mapping_buckets = 1024;
2864 58 : u32 static_mapping_memory_size = 64 << 20;
2865 :
2866 58 : clib_bihash_init_8_8 (&nm->static_mapping_by_local,
2867 : "static_mapping_by_local", static_mapping_buckets,
2868 : static_mapping_memory_size);
2869 58 : clib_bihash_init_8_8 (&nm->static_mapping_by_external,
2870 : "static_mapping_by_external", static_mapping_buckets,
2871 : static_mapping_memory_size);
2872 58 : clib_bihash_set_kvp_format_fn_8_8 (&nm->static_mapping_by_local,
2873 : format_nat44_ei_static_mapping_kvp);
2874 58 : clib_bihash_set_kvp_format_fn_8_8 (&nm->static_mapping_by_external,
2875 : format_nat44_ei_static_mapping_kvp);
2876 :
2877 58 : if (nm->pat)
2878 : {
2879 58 : clib_bihash_init_8_8 (&nm->in2out, "in2out", translation_buckets, 0);
2880 58 : clib_bihash_init_8_8 (&nm->out2in, "out2in", translation_buckets, 0);
2881 58 : clib_bihash_set_kvp_format_fn_8_8 (&nm->in2out,
2882 : format_nat44_ei_session_kvp);
2883 58 : clib_bihash_set_kvp_format_fn_8_8 (&nm->out2in,
2884 : format_nat44_ei_session_kvp);
2885 120 : vec_foreach (tnm, nm->per_thread_data)
2886 : {
2887 62 : nat44_ei_worker_db_init (tnm, translations, translation_buckets,
2888 : user_buckets);
2889 : }
2890 : }
2891 58 : }
2892 :
2893 : void
2894 1 : nat44_ei_sessions_clear ()
2895 : {
2896 1 : nat44_ei_main_t *nm = &nat44_ei_main;
2897 : nat44_ei_main_per_thread_data_t *tnm;
2898 :
2899 1 : if (nm->pat)
2900 : {
2901 1 : clib_bihash_free_8_8 (&nm->in2out);
2902 1 : clib_bihash_free_8_8 (&nm->out2in);
2903 1 : clib_bihash_init_8_8 (&nm->in2out, "in2out", nm->translation_buckets, 0);
2904 1 : clib_bihash_init_8_8 (&nm->out2in, "out2in", nm->translation_buckets, 0);
2905 1 : clib_bihash_set_kvp_format_fn_8_8 (&nm->in2out,
2906 : format_nat44_ei_session_kvp);
2907 1 : clib_bihash_set_kvp_format_fn_8_8 (&nm->out2in,
2908 : format_nat44_ei_session_kvp);
2909 2 : vec_foreach (tnm, nm->per_thread_data)
2910 : {
2911 1 : nat44_ei_worker_db_free (tnm);
2912 1 : nat44_ei_worker_db_init (tnm, nm->translations,
2913 : nm->translation_buckets, nm->user_buckets);
2914 : }
2915 : }
2916 :
2917 1 : vlib_zero_simple_counter (&nm->total_users, 0);
2918 1 : vlib_zero_simple_counter (&nm->total_sessions, 0);
2919 1 : vlib_zero_simple_counter (&nm->user_limit_reached, 0);
2920 1 : }
2921 :
2922 : static void
2923 896 : nat44_ei_update_outside_fib (ip4_main_t *im, uword opaque, u32 sw_if_index,
2924 : u32 new_fib_index, u32 old_fib_index)
2925 : {
2926 896 : nat44_ei_main_t *nm = &nat44_ei_main;
2927 : nat44_ei_outside_fib_t *outside_fib;
2928 : nat44_ei_interface_t *i;
2929 896 : u8 is_add = 1;
2930 896 : u8 match = 0;
2931 :
2932 904 : if (!nm->enabled || (new_fib_index == old_fib_index) ||
2933 8 : (!vec_len (nm->outside_fibs)))
2934 : {
2935 894 : return;
2936 : }
2937 :
2938 11 : pool_foreach (i, nm->interfaces)
2939 : {
2940 9 : if (i->sw_if_index == sw_if_index)
2941 : {
2942 4 : if (!(nat44_ei_interface_is_outside (i)))
2943 2 : return;
2944 2 : match = 1;
2945 : }
2946 : }
2947 :
2948 2 : pool_foreach (i, nm->output_feature_interfaces)
2949 : {
2950 0 : if (i->sw_if_index == sw_if_index)
2951 : {
2952 0 : if (!(nat44_ei_interface_is_outside (i)))
2953 0 : return;
2954 0 : match = 1;
2955 : }
2956 : }
2957 :
2958 2 : if (!match)
2959 0 : return;
2960 :
2961 2 : vec_foreach (outside_fib, nm->outside_fibs)
2962 : {
2963 2 : if (outside_fib->fib_index == old_fib_index)
2964 : {
2965 2 : outside_fib->refcount--;
2966 2 : if (!outside_fib->refcount)
2967 2 : vec_del1 (nm->outside_fibs, outside_fib - nm->outside_fibs);
2968 2 : break;
2969 : }
2970 : }
2971 :
2972 3 : vec_foreach (outside_fib, nm->outside_fibs)
2973 : {
2974 2 : if (outside_fib->fib_index == new_fib_index)
2975 : {
2976 1 : outside_fib->refcount++;
2977 1 : is_add = 0;
2978 1 : break;
2979 : }
2980 : }
2981 :
2982 2 : if (is_add)
2983 : {
2984 1 : vec_add2 (nm->outside_fibs, outside_fib, 1);
2985 1 : outside_fib->refcount = 1;
2986 1 : outside_fib->fib_index = new_fib_index;
2987 : }
2988 : }
2989 :
2990 : int
2991 147 : nat44_ei_add_address (ip4_address_t *addr, u32 vrf_id)
2992 : {
2993 147 : nat44_ei_main_t *nm = &nat44_ei_main;
2994 147 : vlib_thread_main_t *tm = vlib_get_thread_main ();
2995 : nat44_ei_address_t *ap;
2996 :
2997 147 : fail_if_disabled ();
2998 :
2999 : /* Check if address already exists */
3000 5001 : vec_foreach (ap, nm->addresses)
3001 : {
3002 4854 : if (ap->addr.as_u32 == addr->as_u32)
3003 : {
3004 0 : nat44_ei_log_err ("address exist");
3005 0 : return VNET_API_ERROR_VALUE_EXIST;
3006 : }
3007 : }
3008 :
3009 147 : vec_add2 (nm->addresses, ap, 1);
3010 :
3011 147 : ap->fib_index = ~0;
3012 147 : ap->addr = *addr;
3013 :
3014 147 : if (vrf_id != ~0)
3015 : {
3016 5 : ap->fib_index = fib_table_find_or_create_and_lock (
3017 5 : FIB_PROTOCOL_IP4, vrf_id, nm->fib_src_low);
3018 : }
3019 :
3020 : nat_protocol_t proto;
3021 735 : for (proto = 0; proto < NAT_N_PROTOCOLS; ++proto)
3022 : {
3023 588 : ap->busy_port_bitmap[proto] = 0;
3024 588 : ap->busy_ports[proto] = 0;
3025 588 : ap->busy_ports_per_thread[proto] = 0;
3026 1192 : vec_validate_init_empty (ap->busy_ports_per_thread[proto],
3027 : tm->n_vlib_mains - 1, 0);
3028 : }
3029 :
3030 147 : nat44_ei_add_del_addr_to_fib_foreach_out_if (addr, 1);
3031 :
3032 147 : return 0;
3033 : }
3034 :
3035 : int
3036 147 : nat44_ei_del_address (ip4_address_t addr, u8 delete_sm)
3037 : {
3038 147 : nat44_ei_main_t *nm = &nat44_ei_main;
3039 147 : nat44_ei_address_t *a = 0;
3040 : nat44_ei_session_t *ses;
3041 147 : u32 *ses_to_be_removed = 0, *ses_index;
3042 : nat44_ei_main_per_thread_data_t *tnm;
3043 : nat44_ei_static_mapping_t *m;
3044 : int j;
3045 :
3046 147 : fail_if_disabled ();
3047 :
3048 : /* Find SNAT address */
3049 2548 : for (j = 0; j < vec_len (nm->addresses); j++)
3050 : {
3051 2548 : if (nm->addresses[j].addr.as_u32 == addr.as_u32)
3052 : {
3053 147 : a = nm->addresses + j;
3054 147 : break;
3055 : }
3056 : }
3057 147 : if (!a)
3058 : {
3059 0 : nat44_ei_log_err ("no such address");
3060 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
3061 : }
3062 :
3063 147 : if (delete_sm)
3064 : {
3065 5 : pool_foreach (m, nm->static_mappings)
3066 : {
3067 2 : if (m->external_addr.as_u32 == addr.as_u32)
3068 2 : nat44_ei_del_static_mapping_internal (
3069 2 : m->local_addr, m->external_addr, m->local_port, m->external_port,
3070 : m->proto, m->vrf_id, ~0, m->flags);
3071 : }
3072 : }
3073 : else
3074 : {
3075 : /* Check if address is used in some static mapping */
3076 144 : if (nat44_ei_is_address_used_in_static_mapping (addr))
3077 : {
3078 0 : nat44_ei_log_err ("address used in static mapping");
3079 0 : return VNET_API_ERROR_UNSPECIFIED;
3080 : }
3081 : }
3082 :
3083 : /* Delete sessions using address */
3084 147 : if (a->busy_ports[NAT_PROTOCOL_TCP] || a->busy_ports[NAT_PROTOCOL_UDP] ||
3085 15 : a->busy_ports[NAT_PROTOCOL_ICMP])
3086 : {
3087 268 : vec_foreach (tnm, nm->per_thread_data)
3088 : {
3089 15493 : pool_foreach (ses, tnm->sessions)
3090 : {
3091 15357 : if (ses->out2in.addr.as_u32 == addr.as_u32)
3092 : {
3093 10427 : nat44_ei_free_session_data (nm, ses,
3094 10427 : tnm - nm->per_thread_data, 0);
3095 10427 : vec_add1 (ses_to_be_removed, ses - tnm->sessions);
3096 : }
3097 : }
3098 10563 : vec_foreach (ses_index, ses_to_be_removed)
3099 : {
3100 10427 : ses = pool_elt_at_index (tnm->sessions, ses_index[0]);
3101 10427 : nat44_ei_delete_session (nm, ses, tnm - nm->per_thread_data);
3102 : }
3103 136 : vec_free (ses_to_be_removed);
3104 : }
3105 : }
3106 :
3107 147 : nat44_ei_add_del_addr_to_fib_foreach_out_if (&addr, 0);
3108 :
3109 147 : if (a->fib_index != ~0)
3110 : {
3111 5 : fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP4, nm->fib_src_low);
3112 : }
3113 :
3114 : nat_protocol_t proto;
3115 735 : for (proto = 0; proto < NAT_N_PROTOCOLS; ++proto)
3116 : {
3117 588 : vec_free (a->busy_ports_per_thread[proto]);
3118 : }
3119 :
3120 147 : vec_del1 (nm->addresses, j);
3121 147 : return 0;
3122 : }
3123 :
3124 : int
3125 4 : nat44_ei_add_interface_address (u32 sw_if_index)
3126 : {
3127 4 : nat44_ei_main_t *nm = &nat44_ei_main;
3128 4 : ip4_main_t *ip4_main = nm->ip4_main;
3129 : ip4_address_t *first_int_addr;
3130 4 : u32 *auto_add_sw_if_indices = nm->auto_add_sw_if_indices;
3131 : int i;
3132 :
3133 4 : for (i = 0; i < vec_len (auto_add_sw_if_indices); i++)
3134 : {
3135 0 : if (auto_add_sw_if_indices[i] == sw_if_index)
3136 : {
3137 0 : return VNET_API_ERROR_VALUE_EXIST;
3138 : }
3139 : }
3140 :
3141 : /* add to the auto-address list */
3142 4 : vec_add1 (nm->auto_add_sw_if_indices, sw_if_index);
3143 :
3144 : // if the address is already bound - or static - add it now
3145 4 : first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0);
3146 4 : if (first_int_addr)
3147 : {
3148 1 : (void) nat44_ei_add_address (first_int_addr, ~0);
3149 : }
3150 :
3151 4 : return 0;
3152 : }
3153 :
3154 : int
3155 0 : nat44_ei_del_interface_address (u32 sw_if_index)
3156 : {
3157 0 : nat44_ei_main_t *nm = &nat44_ei_main;
3158 0 : ip4_main_t *ip4_main = nm->ip4_main;
3159 : ip4_address_t *first_int_addr;
3160 : nat44_ei_static_map_resolve_t *rp;
3161 0 : u32 *indices_to_delete = 0;
3162 : int i, j;
3163 0 : u32 *auto_add_sw_if_indices = nm->auto_add_sw_if_indices;
3164 :
3165 0 : fail_if_disabled ();
3166 :
3167 0 : first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0);
3168 :
3169 0 : for (i = 0; i < vec_len (auto_add_sw_if_indices); i++)
3170 : {
3171 0 : if (auto_add_sw_if_indices[i] == sw_if_index)
3172 : {
3173 : first_int_addr =
3174 0 : ip4_interface_first_address (ip4_main, sw_if_index, 0);
3175 0 : if (first_int_addr)
3176 : {
3177 0 : (void) nat44_ei_del_address (first_int_addr[0], 1);
3178 : }
3179 : else
3180 : {
3181 0 : for (j = 0; j < vec_len (nm->to_resolve); j++)
3182 : {
3183 0 : rp = nm->to_resolve + j;
3184 0 : if (rp->sw_if_index == sw_if_index)
3185 : {
3186 0 : vec_add1 (indices_to_delete, j);
3187 : }
3188 : }
3189 0 : if (vec_len (indices_to_delete))
3190 : {
3191 0 : for (j = vec_len (indices_to_delete) - 1; j >= 0; j--)
3192 : {
3193 0 : vec_del1 (nm->to_resolve, j);
3194 : }
3195 0 : vec_free (indices_to_delete);
3196 : }
3197 : }
3198 :
3199 0 : vec_del1 (nm->auto_add_sw_if_indices, i);
3200 0 : return 0;
3201 : }
3202 : }
3203 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
3204 : }
3205 :
3206 : static_always_inline int
3207 23 : is_sw_if_index_reg_for_auto_resolve (u32 *sw_if_indices, u32 sw_if_index)
3208 : {
3209 : u32 *i;
3210 23 : vec_foreach (i, sw_if_indices)
3211 : {
3212 7 : if (*i == sw_if_index)
3213 : {
3214 7 : return 1;
3215 : }
3216 : }
3217 16 : return 0;
3218 : }
3219 :
3220 : static void
3221 4699 : nat44_ei_ip4_add_del_interface_address_cb (ip4_main_t *im, uword opaque,
3222 : u32 sw_if_index,
3223 : ip4_address_t *address,
3224 : u32 address_length,
3225 : u32 if_address_index, u32 is_delete)
3226 : {
3227 4699 : nat44_ei_main_t *nm = &nat44_ei_main;
3228 : nat44_ei_static_map_resolve_t *rp;
3229 4699 : nat44_ei_address_t *addresses = nm->addresses;
3230 : int rv, i;
3231 :
3232 4699 : if (!nm->enabled)
3233 : {
3234 4676 : return;
3235 : }
3236 :
3237 23 : if (!is_sw_if_index_reg_for_auto_resolve (nm->auto_add_sw_if_indices,
3238 : sw_if_index))
3239 : {
3240 16 : return;
3241 : }
3242 :
3243 7 : if (!is_delete)
3244 : {
3245 : /* Don't trip over lease renewal, static config */
3246 4 : for (i = 0; i < vec_len (addresses); i++)
3247 : {
3248 0 : if (addresses[i].addr.as_u32 == address->as_u32)
3249 : {
3250 0 : return;
3251 : }
3252 : }
3253 :
3254 4 : (void) nat44_ei_add_address (address, ~0);
3255 :
3256 : /* Scan static map resolution vector */
3257 7 : for (i = 0; i < vec_len (nm->to_resolve); i++)
3258 : {
3259 3 : rp = nm->to_resolve + i;
3260 3 : if (is_sm_addr_only (rp->flags))
3261 : {
3262 2 : continue;
3263 : }
3264 : /* On this interface? */
3265 1 : if (rp->sw_if_index == sw_if_index)
3266 : {
3267 1 : rv = nat44_ei_add_static_mapping_internal (
3268 1 : rp->l_addr, address[0], rp->l_port, rp->e_port, rp->proto,
3269 : rp->vrf_id, ~0, rp->flags, rp->pool_addr, rp->tag);
3270 1 : if (rv)
3271 : {
3272 0 : nat_elog_notice_X1 (
3273 : nm, "add_static_mapping_internal returned %d", "i4", rv);
3274 : }
3275 : }
3276 : }
3277 : }
3278 : else
3279 : {
3280 : // remove all static mapping records
3281 3 : (void) nat44_ei_del_address (address[0], 1);
3282 : }
3283 : }
3284 :
3285 : int
3286 1 : nat44_ei_set_frame_queue_nelts (u32 frame_queue_nelts)
3287 : {
3288 1 : fail_if_enabled ();
3289 1 : nat44_ei_main_t *nm = &nat44_ei_main;
3290 1 : nm->frame_queue_nelts = frame_queue_nelts;
3291 1 : return 0;
3292 : }
3293 :
3294 : static void
3295 4699 : nat44_ei_ip4_add_del_addr_only_sm_cb (ip4_main_t *im, uword opaque,
3296 : u32 sw_if_index, ip4_address_t *address,
3297 : u32 address_length, u32 if_address_index,
3298 : u32 is_delete)
3299 : {
3300 4699 : nat44_ei_main_t *nm = &nat44_ei_main;
3301 : nat44_ei_static_map_resolve_t *rp;
3302 : nat44_ei_static_mapping_t *m;
3303 : clib_bihash_kv_8_8_t kv, value;
3304 4699 : int i, rv = 0, match = 0;
3305 :
3306 4699 : if (!nm->enabled)
3307 : {
3308 4697 : return;
3309 : }
3310 :
3311 25 : for (i = 0; i < vec_len (nm->to_resolve); i++)
3312 : {
3313 5 : rp = nm->to_resolve + i;
3314 :
3315 5 : if (is_sm_addr_only (rp->flags) && rp->sw_if_index == sw_if_index)
3316 : {
3317 3 : match = 1;
3318 3 : break;
3319 : }
3320 : }
3321 :
3322 23 : if (!match)
3323 : {
3324 20 : return;
3325 : }
3326 :
3327 3 : init_nat_k (&kv, *address, is_sm_addr_only (rp->flags) ? 0 : rp->e_port,
3328 : nm->outside_fib_index,
3329 3 : is_sm_addr_only (rp->flags) ? 0 : rp->proto);
3330 3 : if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv, &value))
3331 3 : m = 0;
3332 : else
3333 0 : m = pool_elt_at_index (nm->static_mappings, value.value);
3334 :
3335 3 : if (is_delete)
3336 : {
3337 1 : if (!m)
3338 1 : return;
3339 0 : rv = nat44_ei_del_static_mapping_internal (
3340 0 : rp->l_addr, address[0], rp->l_port, rp->e_port, rp->proto, rp->vrf_id,
3341 : ~0, rp->flags);
3342 0 : if (rv)
3343 : {
3344 0 : nat_elog_notice_X1 (nm, "nat44_ei_del_static_mapping returned %d",
3345 : "i4", rv);
3346 : }
3347 : }
3348 : else
3349 : {
3350 2 : if (m)
3351 0 : return;
3352 2 : rv = nat44_ei_add_static_mapping_internal (
3353 2 : rp->l_addr, address[0], rp->l_port, rp->e_port, rp->proto, rp->vrf_id,
3354 : ~0, rp->flags, rp->pool_addr, rp->tag);
3355 :
3356 2 : if (rv)
3357 : {
3358 0 : nat_elog_notice_X1 (nm, "nat44_ei_add_static_mapping returned %d",
3359 : "i4", rv);
3360 : }
3361 : }
3362 : }
3363 :
3364 : static_always_inline uword
3365 2 : nat44_ei_classify_inline_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
3366 : vlib_frame_t *frame)
3367 : {
3368 : u32 n_left_from, *from, *to_next;
3369 : nat44_ei_classify_next_t next_index;
3370 2 : nat44_ei_main_t *nm = &nat44_ei_main;
3371 : nat44_ei_static_mapping_t *m;
3372 2 : u32 next_in2out = 0, next_out2in = 0;
3373 :
3374 2 : from = vlib_frame_vector_args (frame);
3375 2 : n_left_from = frame->n_vectors;
3376 2 : next_index = node->cached_next_index;
3377 :
3378 4 : while (n_left_from > 0)
3379 : {
3380 : u32 n_left_to_next;
3381 :
3382 2 : vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
3383 :
3384 4 : while (n_left_from > 0 && n_left_to_next > 0)
3385 : {
3386 : u32 bi0;
3387 : vlib_buffer_t *b0;
3388 2 : u32 next0 = NAT44_EI_CLASSIFY_NEXT_IN2OUT;
3389 : ip4_header_t *ip0;
3390 : nat44_ei_address_t *ap;
3391 : clib_bihash_kv_8_8_t kv0, value0;
3392 :
3393 : /* speculatively enqueue b0 to the current next frame */
3394 2 : bi0 = from[0];
3395 2 : to_next[0] = bi0;
3396 2 : from += 1;
3397 2 : to_next += 1;
3398 2 : n_left_from -= 1;
3399 2 : n_left_to_next -= 1;
3400 :
3401 2 : b0 = vlib_get_buffer (vm, bi0);
3402 2 : ip0 = vlib_buffer_get_current (b0);
3403 :
3404 3 : vec_foreach (ap, nm->addresses)
3405 : {
3406 2 : if (ip0->dst_address.as_u32 == ap->addr.as_u32)
3407 : {
3408 1 : next0 = NAT44_EI_CLASSIFY_NEXT_OUT2IN;
3409 1 : goto enqueue0;
3410 : }
3411 : }
3412 :
3413 1 : if (PREDICT_FALSE (pool_elts (nm->static_mappings)))
3414 : {
3415 0 : init_nat_k (&kv0, ip0->dst_address, 0, 0, 0);
3416 : /* try to classify the fragment based on IP header alone */
3417 0 : if (!clib_bihash_search_8_8 (&nm->static_mapping_by_external,
3418 : &kv0, &value0))
3419 : {
3420 0 : m = pool_elt_at_index (nm->static_mappings, value0.value);
3421 0 : if (m->local_addr.as_u32 != m->external_addr.as_u32)
3422 0 : next0 = NAT44_EI_CLASSIFY_NEXT_OUT2IN;
3423 0 : goto enqueue0;
3424 : }
3425 0 : init_nat_k (&kv0, ip0->dst_address,
3426 0 : vnet_buffer (b0)->ip.reass.l4_dst_port, 0,
3427 0 : ip_proto_to_nat_proto (ip0->protocol));
3428 0 : if (!clib_bihash_search_8_8 (&nm->static_mapping_by_external,
3429 : &kv0, &value0))
3430 : {
3431 0 : m = pool_elt_at_index (nm->static_mappings, value0.value);
3432 0 : if (m->local_addr.as_u32 != m->external_addr.as_u32)
3433 0 : next0 = NAT44_EI_CLASSIFY_NEXT_OUT2IN;
3434 : }
3435 : }
3436 :
3437 1 : enqueue0:
3438 2 : if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3439 : (b0->flags & VLIB_BUFFER_IS_TRACED)))
3440 : {
3441 : nat44_ei_classify_trace_t *t =
3442 2 : vlib_add_trace (vm, node, b0, sizeof (*t));
3443 2 : t->cached = 0;
3444 2 : t->next_in2out = next0 == NAT44_EI_CLASSIFY_NEXT_IN2OUT ? 1 : 0;
3445 : }
3446 :
3447 2 : next_in2out += next0 == NAT44_EI_CLASSIFY_NEXT_IN2OUT;
3448 2 : next_out2in += next0 == NAT44_EI_CLASSIFY_NEXT_OUT2IN;
3449 :
3450 : /* verify speculative enqueue, maybe switch current next frame */
3451 2 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
3452 : n_left_to_next, bi0, next0);
3453 : }
3454 :
3455 2 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
3456 : }
3457 :
3458 2 : vlib_node_increment_counter (
3459 : vm, node->node_index, NAT44_EI_CLASSIFY_ERROR_NEXT_IN2OUT, next_in2out);
3460 2 : vlib_node_increment_counter (
3461 : vm, node->node_index, NAT44_EI_CLASSIFY_ERROR_NEXT_OUT2IN, next_out2in);
3462 2 : return frame->n_vectors;
3463 : }
3464 :
3465 561 : VLIB_NODE_FN (nat44_ei_classify_node)
3466 : (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
3467 : {
3468 2 : return nat44_ei_classify_inline_fn (vm, node, frame);
3469 : }
3470 :
3471 62744 : VLIB_REGISTER_NODE (nat44_ei_classify_node) = {
3472 : .name = "nat44-ei-classify",
3473 : .vector_size = sizeof (u32),
3474 : .format_trace = format_nat44_ei_classify_trace,
3475 : .type = VLIB_NODE_TYPE_INTERNAL,
3476 : .n_errors = ARRAY_LEN(nat44_ei_classify_error_strings),
3477 : .error_strings = nat44_ei_classify_error_strings,
3478 : .n_next_nodes = NAT44_EI_CLASSIFY_N_NEXT,
3479 : .next_nodes = {
3480 : [NAT44_EI_CLASSIFY_NEXT_IN2OUT] = "nat44-ei-in2out",
3481 : [NAT44_EI_CLASSIFY_NEXT_OUT2IN] = "nat44-ei-out2in",
3482 : [NAT44_EI_CLASSIFY_NEXT_DROP] = "error-drop",
3483 : },
3484 : };
3485 :
3486 559 : VLIB_NODE_FN (nat44_ei_handoff_classify_node)
3487 : (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
3488 : {
3489 0 : return nat44_ei_classify_inline_fn (vm, node, frame);
3490 : }
3491 :
3492 62744 : VLIB_REGISTER_NODE (nat44_ei_handoff_classify_node) = {
3493 : .name = "nat44-ei-handoff-classify",
3494 : .vector_size = sizeof (u32),
3495 : .format_trace = format_nat44_ei_classify_trace,
3496 : .type = VLIB_NODE_TYPE_INTERNAL,
3497 : .n_errors = ARRAY_LEN(nat44_ei_classify_error_strings),
3498 : .error_strings = nat44_ei_classify_error_strings,
3499 : .n_next_nodes = NAT44_EI_CLASSIFY_N_NEXT,
3500 : .next_nodes = {
3501 : [NAT44_EI_CLASSIFY_NEXT_IN2OUT] = "nat44-ei-in2out-worker-handoff",
3502 : [NAT44_EI_CLASSIFY_NEXT_OUT2IN] = "nat44-ei-out2in-worker-handoff",
3503 : [NAT44_EI_CLASSIFY_NEXT_DROP] = "error-drop",
3504 : },
3505 : };
3506 :
3507 : /*
3508 : * fd.io coding-style-patch-verification: ON
3509 : *
3510 : * Local Variables:
3511 : * eval: (c-set-style "gnu")
3512 : * End:
3513 : */
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