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Vector Packet Processing
nat.h
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1 
2 /*
3  * nat.h - NAT plugin definitions
4  *
5  * Copyright (c) 2016 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 #ifndef __included_nat_h__
19 #define __included_nat_h__
20 
21 #include <vnet/vnet.h>
22 #include <vnet/ip/ip.h>
23 #include <vnet/ethernet/ethernet.h>
24 #include <vnet/ip/icmp46_packet.h>
25 #include <vnet/api_errno.h>
26 #include <vppinfra/bihash_8_8.h>
27 #include <vppinfra/bihash_16_8.h>
28 #include <vppinfra/dlist.h>
29 #include <vppinfra/error.h>
30 #include <vlibapi/api.h>
31 #include <vlib/log.h>
32 
33 
34 #define SNAT_UDP_TIMEOUT 300
35 #define SNAT_UDP_TIMEOUT_MIN 120
36 #define SNAT_TCP_TRANSITORY_TIMEOUT 240
37 #define SNAT_TCP_ESTABLISHED_TIMEOUT 7440
38 #define SNAT_TCP_INCOMING_SYN 6
39 #define SNAT_ICMP_TIMEOUT 60
40 
41 #define NAT_FQ_NELTS 64
42 
43 #define SNAT_FLAG_HAIRPINNING (1 << 0)
44 
45 /* Key */
46 typedef struct {
47  union
48  {
49  struct
50  {
53  u16 protocol:3,
54  fib_index:13;
55  };
57  };
59 
60 typedef struct {
61  union
62  {
63  struct
64  {
67  u32 proto:8,
68  fib_index:24;
71  };
72  u64 as_u64[2];
73  };
75 
76 typedef struct {
77  union
78  {
79  struct
80  {
84  };
86  };
88 
89 typedef struct {
90  union
91  {
92  struct
93  {
96  };
98  };
100 
101 
102 #define foreach_snat_protocol \
103  _(UDP, 0, udp, "udp") \
104  _(TCP, 1, tcp, "tcp") \
105  _(ICMP, 2, icmp, "icmp")
106 
107 typedef enum {
108 #define _(N, i, n, s) SNAT_PROTOCOL_##N = i,
110 #undef _
112 
113 
114 #define foreach_snat_session_state \
115  _(0, UNKNOWN, "unknown") \
116  _(1, UDP_ACTIVE, "udp-active") \
117  _(2, TCP_SYN_SENT, "tcp-syn-sent") \
118  _(3, TCP_ESTABLISHED, "tcp-established") \
119  _(4, TCP_FIN_WAIT, "tcp-fin-wait") \
120  _(5, TCP_CLOSE_WAIT, "tcp-close-wait") \
121  _(6, TCP_CLOSING, "tcp-closing") \
122  _(7, TCP_LAST_ACK, "tcp-last-ack") \
123  _(8, TCP_CLOSED, "tcp-closed") \
124  _(9, ICMP_ACTIVE, "icmp-active")
125 
126 typedef enum {
127 #define _(v, N, s) SNAT_SESSION_##N = v,
129 #undef _
131 
132 #define NAT44_SES_I2O_FIN 1
133 #define NAT44_SES_O2I_FIN 2
134 #define NAT44_SES_I2O_FIN_ACK 4
135 #define NAT44_SES_O2I_FIN_ACK 8
136 
137 #define nat44_is_ses_closed(s) s->state == 0xf
138 
139 #define SNAT_SESSION_FLAG_STATIC_MAPPING 1
140 #define SNAT_SESSION_FLAG_UNKNOWN_PROTO 2
141 #define SNAT_SESSION_FLAG_LOAD_BALANCING 4
142 #define SNAT_SESSION_FLAG_TWICE_NAT 8
143 #define SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT 16
144 #define SNAT_SESSION_FLAG_FWD_BYPASS 32
145 
146 #define NAT_INTERFACE_FLAG_IS_INSIDE 1
147 #define NAT_INTERFACE_FLAG_IS_OUTSIDE 2
148 
149 typedef CLIB_PACKED(struct {
150  snat_session_key_t out2in; /* 0-15 */
151 
152  snat_session_key_t in2out; /* 16-31 */
153 
154  u32 flags; /* 32-35 */
155 
156  /* per-user translations */
157  u32 per_user_index; /* 36-39 */
158 
159  u32 per_user_list_head_index; /* 40-43 */
160 
161  /* Last heard timer */
162  f64 last_heard; /* 44-51 */
163 
164  u64 total_bytes; /* 52-59 */
165 
166  u32 total_pkts; /* 60-63 */
167 
168  /* Outside address */
169  u32 outside_address_index; /* 64-67 */
170 
171  /* External host address and port */
172  ip4_address_t ext_host_addr; /* 68-71 */
173  u16 ext_host_port; /* 72-73 */
174 
175  /* External hos address and port after translation */
176  ip4_address_t ext_host_nat_addr; /* 74-77 */
177  u16 ext_host_nat_port; /* 78-79 */
178 
179  /* TCP session state */
180  u8 state;
181  u32 i2o_fin_seq;
182  u32 o2i_fin_seq;
183 }) snat_session_t;
184 
185 
186 typedef struct {
192 } snat_user_t;
193 
194 typedef struct {
197 #define _(N, i, n, s) \
198  u16 busy_##n##_ports; \
199  u16 * busy_##n##_ports_per_thread; \
200  uword * busy_##n##_port_bitmap;
202 #undef _
203 } snat_address_t;
204 
205 typedef struct {
211 
212 typedef struct {
220  /* vector of sessions */
223 
224 typedef struct {
230 
231 typedef enum {
236 
237 typedef struct {
243  twice_nat_type_t twice_nat;
247  snat_protocol_t proto;
249  u8 *tag;
252 
253 typedef struct {
257 
258 typedef struct {
264  snat_protocol_t proto;
267  int is_add;
268  u8 *tag;
270 
271 typedef struct {
272  /* Main lookup tables */
273  clib_bihash_8_8_t out2in;
274  clib_bihash_8_8_t in2out;
275 
276  /* Endpoint dependent sessions lookup tables */
277  clib_bihash_16_8_t out2in_ed;
278  clib_bihash_16_8_t in2out_ed;
279 
280  /* Find-a-user => src address lookup */
281  clib_bihash_8_8_t user_hash;
282 
283  /* User pool */
285 
286  /* Session pool */
287  snat_session_t * sessions;
288 
289  /* Pool of doubly-linked list elements */
291 
294 
295 struct snat_main_s;
296 
298  vlib_node_runtime_t *node,
299  u32 thread_index,
300  vlib_buffer_t *b0,
301  ip4_header_t *ip0,
302  u8 *p_proto,
303  snat_session_key_t *p_value,
304  u8 *p_dont_translate,
305  void *d,
306  void *e);
307 
308 typedef u32 (snat_get_worker_function_t) (ip4_header_t * ip, u32 rx_fib_index);
309 
310 typedef int nat_alloc_out_addr_and_port_function_t (snat_address_t * addresses,
311  u32 fib_index,
312  u32 thread_index,
313  snat_session_key_t * k,
314  u32 * address_indexp,
316  u32 snat_thread_index);
317 
318 typedef struct snat_main_s {
321 
329 
330  /* Per thread data */
332 
333  /* Find a static mapping by local */
334  clib_bihash_8_8_t static_mapping_by_local;
335 
336  /* Find a static mapping by external */
337  clib_bihash_8_8_t static_mapping_by_external;
338 
339  /* Static mapping pool */
341 
342  /* Interface pool */
345 
346  /* Vector of outside addresses */
347  snat_address_t * addresses;
352 
353  /* Vector of twice NAT addresses for extenal hosts */
354  snat_address_t * twice_nat_addresses;
355 
356  /* sw_if_indices whose intfc addresses should be auto-added */
359 
360  /* vector of interface address static mappings to resolve. */
362 
363  /* Randomize port allocation order */
365 
366  /* Worker handoff index */
370 
371  /* in2out and out2in node index */
376 
377  /* Deterministic NAT */
379 
380  /* If forwarding is enabled */
382 
383  /* Config parameters */
399 
400  /* values of various timeouts */
405 
406  /* API message ID base */
408 
409  /* log class */
411 
412  /* convenience */
418 } snat_main_t;
419 
420 extern snat_main_t snat_main;
441 
442 void snat_free_outside_address_and_port (snat_address_t * addresses,
443  u32 thread_index,
444  snat_session_key_t * k,
445  u32 address_index);
446 
447 int snat_alloc_outside_address_and_port (snat_address_t * addresses,
448  u32 fib_index,
449  u32 thread_index,
450  snat_session_key_t * k,
451  u32 * address_indexp,
453  u32 snat_thread_index);
454 
456  snat_session_key_t match,
457  snat_session_key_t * mapping,
458  u8 by_external,
459  u8 *is_addr_only,
460  twice_nat_type_t *twice_nat,
461  u8 *lb);
462 
464  u8 p_len,
465  u32 sw_if_index,
466  int is_add);
467 
473 
474 typedef struct {
478 
479 /** \brief Check if SNAT session is created from static mapping.
480  @param s SNAT session
481  @return 1 if SNAT session is created from static mapping otherwise 0
482 */
483 #define snat_is_session_static(s) (s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING)
484 
485 /** \brief Check if SNAT session for unknown protocol.
486  @param s SNAT session
487  @return 1 if SNAT session for unknown protocol otherwise 0
488 */
489 #define snat_is_unk_proto_session(s) (s->flags & SNAT_SESSION_FLAG_UNKNOWN_PROTO)
490 
491 /** \brief Check if NAT session is twice NAT.
492  @param s NAT session
493  @return 1 if NAT session is twice NAT
494 */
495 #define is_twice_nat_session(s) (s->flags & SNAT_SESSION_FLAG_TWICE_NAT)
496 
497 /** \brief Check if NAT session is load-balancing.
498  @param s NAT session
499  @return 1 if NAT session is load-balancing
500 */
501 #define is_lb_session(s) (s->flags & SNAT_SESSION_FLAG_LOAD_BALANCING)
502 
503 /** \brief Check if NAT session is forwarding bypass.
504  @param s NAT session
505  @return 1 if NAT session is load-balancing
506 */
507 #define is_fwd_bypass_session(s) (s->flags & SNAT_SESSION_FLAG_FWD_BYPASS)
508 
509 /** \brief Check if NAT session is endpoint dependent.
510  @param s NAT session
511  @return 1 if NAT session is endpoint dependent
512 */
513 #define is_ed_session(s) (s->flags & SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT)
514 
515 #define nat_interface_is_inside(i) i->flags & NAT_INTERFACE_FLAG_IS_INSIDE
516 #define nat_interface_is_outside(i) i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE
517 
518 #define nat_log_err(...) \
519  vlib_log(VLIB_LOG_LEVEL_ERR, snat_main.log_class, __VA_ARGS__)
520 #define nat_log_warn(...) \
521  vlib_log(VLIB_LOG_LEVEL_WARNING, snat_main.log_class, __VA_ARGS__)
522 #define nat_log_notice(...) \
523  vlib_log(VLIB_LOG_LEVEL_NOTICE, snat_main.log_class, __VA_ARGS__)
524 #define nat_log_info(...) \
525  vlib_log(VLIB_LOG_LEVEL_INFO, snat_main.log_class, __VA_ARGS__)
526 #define nat_log_debug(...)\
527  vlib_log(VLIB_LOG_LEVEL_DEBUG, snat_main.log_class, __VA_ARGS__)
528 
529 /*
530  * Why is this here? Because we don't need to touch this layer to
531  * simply reply to an icmp. We need to change id to a unique
532  * value to NAT an echo request/reply.
533  */
534 
535 typedef struct {
539 
540 typedef struct {
541  u16 src_port, dst_port;
543 
545  u32 thread_index, vlib_buffer_t *b0,
546  ip4_header_t *ip0, u8 *p_proto,
547  snat_session_key_t *p_value,
548  u8 *p_dont_translate, void *d, void *e);
550  u32 thread_index, vlib_buffer_t *b0,
551  ip4_header_t *ip0, u8 *p_proto,
552  snat_session_key_t *p_value,
553  u8 *p_dont_translate, void *d, void *e);
555  u32 thread_index, vlib_buffer_t *b0,
556  ip4_header_t *ip0, u8 *p_proto,
557  snat_session_key_t *p_value,
558  u8 *p_dont_translate, void *d, void *e);
560  u32 thread_index, vlib_buffer_t *b0,
561  ip4_header_t *ip0, u8 *p_proto,
562  snat_session_key_t *p_value,
563  u8 *p_dont_translate, void *d, void *e);
565  u32 thread_index, vlib_buffer_t *b0,
566  ip4_header_t *ip0, u8 *p_proto,
567  snat_session_key_t *p_value,
568  u8 *p_dont_translate, void *d, void *e);
570  u32 thread_index, vlib_buffer_t *b0,
571  ip4_header_t *ip0, u8 *p_proto,
572  snat_session_key_t *p_value,
573  u8 *p_dont_translate, void *d, void *e);
575  u32 thread_index, vlib_buffer_t *b0,
576  ip4_header_t *ip0, u8 *p_proto,
577  snat_session_key_t *p_value,
578  u8 *p_dont_translate, void *d, void *e);
580  u32 thread_index, vlib_buffer_t *b0,
581  ip4_header_t *ip0, u8 *p_proto,
582  snat_session_key_t *p_value,
583  u8 *p_dont_translate, void *d, void *e);
586  u8 twice_nat);
587 int snat_del_address(snat_main_t *sm, ip4_address_t addr, u8 delete_sm,
588  u8 twice_nat);
591  u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
592  u32 sw_if_index, snat_protocol_t proto, int is_add,
593  twice_nat_type_t twice_nat, u8 out2in_only,
594  u8 *tag);
596 int snat_set_workers (uword * bitmap);
597 int snat_interface_add_del(u32 sw_if_index, u8 is_inside, int is_del);
598 int snat_interface_add_del_output_feature(u32 sw_if_index, u8 is_inside,
599  int is_del);
600 int snat_add_interface_address(snat_main_t *sm, u32 sw_if_index, int is_del,
601  u8 twice_nat);
602 uword unformat_snat_protocol(unformat_input_t * input, va_list * args);
603 u8 * format_snat_protocol(u8 * s, va_list * args);
605  snat_protocol_t proto, u32 vrf_id,
606  nat44_lb_addr_port_t *locals, u8 is_add,
607  twice_nat_type_t twice_nat, u8 out2in_only,
608  u8 *tag);
610  snat_protocol_t proto, u32 vrf_id, int is_in);
612  ip4_address_t *eh_addr, u16 eh_port, u8 proto,
613  u32 vrf_id, int is_in);
614 void nat_free_session_data (snat_main_t * sm, snat_session_t * s,
615  u32 thread_index);
617  u32 fib_index, u32 thread_index);
618 snat_session_t * nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u,
619  u32 thread_index);
621  u16 psid_length);
623 
624 #endif /* __included_snat_h__ */
ip4_address_t external_addr
Definition: nat.h:239
int snat_del_address(snat_main_t *sm, ip4_address_t addr, u8 delete_sm, u8 twice_nat)
Definition: nat.c:1478
u32 user_memory_size
Definition: nat.h:393
clib_error_t * snat_api_init(vlib_main_t *vm, snat_main_t *sm)
Definition: nat_api.c:3145
vlib_node_registration_t snat_hairpin_src_node
(constructor) VLIB_REGISTER_NODE (snat_hairpin_src_node)
Definition: in2out.c:116
void nat_free_session_data(snat_main_t *sm, snat_session_t *s, u32 thread_index)
Definition: nat.c:187
u32 sessions_per_user_list_head_index
Definition: nat.h:189
u32 vlib_log_class_t
Definition: log.h:21
int snat_interface_add_del(u32 sw_if_index, u8 is_inside, int is_del)
Definition: nat.c:1581
u16 ext_host_port
Definition: nat.h:82
u16 out_port
Definition: nat.h:83
a
Definition: bitmap.h:537
u32 icmp_timeout
Definition: nat.h:404
u32 fq_in2out_output_index
Definition: nat.h:368
u32 icmp_match_in2out_det(snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Get address and port values to be used for ICMP packet translation and create session if needed...
Definition: in2out.c:4293
u64 as_u64
Definition: bihash_doc.h:63
u32 nsessions
Definition: nat.h:190
#define foreach_snat_session_state
Definition: nat.h:114
unsigned long u64
Definition: types.h:89
ip4_address_t addr
Definition: nat.h:225
int snat_add_interface_address(snat_main_t *sm, u32 sw_if_index, int is_del, u8 twice_nat)
Definition: nat.c:3263
snat_protocol_t proto
Definition: nat.h:247
u16 port_per_thread
Definition: nat.h:327
u32 nstaticsessions
Definition: nat.h:191
u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Get address and port values to be used for ICMP packet translation and create session if needed...
Definition: out2in.c:286
vlib_node_registration_t nat44_ed_in2out_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_in2out_node)
Definition: in2out.c:119
format_function_t format_det_map_ses
Definition: nat.h:472
vlib_node_registration_t snat_det_out2in_node
(constructor) VLIB_REGISTER_NODE (snat_det_out2in_node)
Definition: out2in.c:3292
vlib_node_registration_t nat44_ed_hairpin_src_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_hairpin_src_node)
Definition: in2out.c:124
u32 fib_index
Definition: nat.h:188
format_function_t format_snat_static_mapping
Definition: nat.h:469
u8 *( format_function_t)(u8 *s, va_list *args)
Definition: format.h:48
snat_det_map_t * det_maps
Definition: nat.h:378
int nat44_add_del_lb_static_mapping(ip4_address_t e_addr, u16 e_port, snat_protocol_t proto, u32 vrf_id, nat44_lb_addr_port_t *locals, u8 is_add, twice_nat_type_t twice_nat, u8 out2in_only, u8 *tag)
Definition: nat.c:1219
nat_alloc_out_addr_and_port_function_t * alloc_addr_and_port
Definition: nat.h:348
u32 num_snat_thread
Definition: nat.h:328
#define foreach_snat_protocol
Definition: nat.h:102
dlist_elt_t * list_pool
Definition: nat.h:290
u8 in_plen
Definition: nat.h:214
unsigned char u8
Definition: types.h:56
u8 deterministic
Definition: nat.h:386
u32 icmp_match_out2in_ed(snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Definition: out2in.c:1822
u16 l_port
Definition: nat.h:69
nat44_lb_addr_port_t * locals
Definition: nat.h:250
int snat_set_workers(uword *bitmap)
Definition: nat.c:1906
u32 user_buckets
Definition: nat.h:392
double f64
Definition: types.h:142
clib_bihash_8_8_t user_hash
Definition: nat.h:281
u32 cached_sw_if_index
Definition: nat.h:475
u16 identifier
Definition: nat.h:536
u32 snat_icmp_match_function_t(struct snat_main_s *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Definition: nat.h:297
void nat_set_alloc_addr_and_port_mape(u16 psid, u16 psid_offset, u16 psid_length)
Definition: nat.c:3417
u32 max_translations_per_user
Definition: nat.h:394
u32( snat_get_worker_function_t)(ip4_header_t *ip, u32 rx_fib_index)
Definition: nat.h:308
clib_bihash_8_8_t in2out
Definition: nat.h:274
u32 in2out_output_node_index
Definition: nat.h:373
u16 r_port
Definition: nat.h:70
vlib_node_registration_t snat_out2in_node
(constructor) VLIB_REGISTER_NODE (snat_out2in_node)
Definition: out2in.c:1225
ip4_address_t ext_host_addr
Definition: nat.h:81
u32 translation_buckets
Definition: nat.h:389
int nat_alloc_out_addr_and_port_function_t(snat_address_t *addresses, u32 fib_index, u32 thread_index, snat_session_key_t *k, u32 *address_indexp, u16 port_per_thread, u32 snat_thread_index)
Definition: nat.h:310
ip4_address_t addr
Definition: nat.h:187
int snat_static_mapping_match(snat_main_t *sm, snat_session_key_t match, snat_session_key_t *mapping, u8 by_external, u8 *is_addr_only, twice_nat_type_t *twice_nat, u8 *lb)
Match NAT44 static mapping.
Definition: nat.c:2101
int snat_add_address(snat_main_t *sm, ip4_address_t *addr, u32 vrf_id, u8 twice_nat)
Definition: nat.c:666
ip4_main_t * ip4_main
Definition: nat.h:415
unsigned int u32
Definition: types.h:88
vlib_node_registration_t snat_in2out_output_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_output_node)
Definition: in2out.c:112
ip4_address_t local_addr
Definition: nat.h:238
vlib_node_registration_t snat_in2out_output_worker_handoff_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node)
Definition: in2out.c:114
uword unformat_snat_protocol(unformat_input_t *input, va_list *args)
Definition: nat.c:2386
snat_protocol_t proto
Definition: nat.h:264
u32 icmp_match_out2in_det(snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Get address and port values to be used for ICMP packet translation and create session if needed...
Definition: out2in.c:3330
vlib_node_registration_t snat_out2in_fast_node
(constructor) VLIB_REGISTER_NODE (snat_out2in_fast_node)
Definition: out2in.c:3814
twice_nat_type_t twice_nat
Definition: nat.h:243
u32 max_translations
Definition: nat.h:391
u32 * auto_add_sw_if_indices_twice_nat
Definition: nat.h:358
vlib_node_registration_t nat44_ed_out2in_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_out2in_node)
Definition: out2in.c:2767
vlib_node_registration_t snat_hairpin_dst_node
(constructor) VLIB_REGISTER_NODE (snat_hairpin_dst_node)
Definition: in2out.c:115
void snat_free_outside_address_and_port(snat_address_t *addresses, u32 thread_index, snat_session_key_t *k, u32 address_index)
Definition: nat.c:2056
clib_bihash_16_8_t out2in_ed
Definition: nat.h:277
snat_det_session_t * sessions
Definition: nat.h:221
vlib_main_t * vlib_main
Definition: nat.h:413
int snat_alloc_outside_address_and_port(snat_address_t *addresses, u32 fib_index, u32 thread_index, snat_session_key_t *k, u32 *address_indexp, u16 port_per_thread, u32 snat_thread_index)
Definition: nat.c:2202
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
u8 out2in_dpo
Definition: nat.h:387
snat_static_mapping_t * static_mappings
Definition: nat.h:340
u32 inside_fib_index
Definition: nat.h:398
u32 udp_timeout
Definition: nat.h:401
u8 static_mapping_only
Definition: nat.h:384
int nat44_del_ed_session(snat_main_t *sm, ip4_address_t *addr, u16 port, ip4_address_t *eh_addr, u16 eh_port, u8 proto, u32 vrf_id, int is_in)
Definition: nat.c:3373
vlib_node_registration_t nat44_ed_out2in_worker_handoff_node
void nat_set_alloc_addr_and_port_default(void)
Definition: nat.c:3428
void snat_add_del_addr_to_fib(ip4_address_t *addr, u8 p_len, u32 sw_if_index, int is_add)
Add/del NAT address to FIB.
Definition: nat.c:634
clib_bihash_8_8_t static_mapping_by_external
Definition: nat.h:337
u8 psid_offset
Definition: nat.h:349
int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr, u16 l_port, u16 e_port, u32 vrf_id, int addr_only, u32 sw_if_index, snat_protocol_t proto, int is_add, twice_nat_type_t twice_nat, u8 out2in_only, u8 *tag)
Add static mapping.
Definition: nat.c:796
struct snat_main_s snat_main_t
snat_session_t * nat_session_alloc_or_recycle(snat_main_t *sm, snat_user_t *u, u32 thread_index)
Definition: nat.c:341
api_main_t * api_main
Definition: nat.h:417
u8 out_plen
Definition: nat.h:216
u8 psid_length
Definition: nat.h:350
vnet_main_t * vnet_main
Definition: nat.h:414
u32 inside_vrf_id
Definition: nat.h:397
vlib_node_registration_t nat44_ed_in2out_worker_handoff_node
u32 fq_out2in_index
Definition: nat.h:369
API main structure, used by both vpp and binary API clients.
Definition: api_common.h:201
snat_interface_t * output_feature_interfaces
Definition: nat.h:344
u16 src_port
Definition: nat.h:541
snat_main_t snat_main
Definition: nat.c:36
vlib_node_registration_t snat_det_in2out_node
(constructor) VLIB_REGISTER_NODE (snat_det_in2out_node)
Definition: in2out.c:111
snat_session_state_t
Definition: nat.h:126
snat_user_t * users
Definition: nat.h:284
u32 random_seed
Definition: nat.h:364
clib_bihash_8_8_t out2in
Definition: nat.h:273
vlib_main_t * vm
Definition: buffer.c:294
u32 outside_vrf_id
Definition: nat.h:395
ip4_address_t l_addr
Definition: nat.h:65
u8 static_mapping_connection_tracking
Definition: nat.h:385
snat_get_worker_function_t * worker_in2out_cb
Definition: nat.h:325
format_function_t format_snat_static_map_to_resolve
Definition: nat.h:470
u32 error_node_index
Definition: nat.h:375
u32 sharing_ratio
Definition: nat.h:217
ip4_address_t out_addr
Definition: nat.h:215
u16 psid
Definition: nat.h:351
u32 outside_fib_index
Definition: nat.h:396
typedef CLIB_PACKED(struct{snat_session_key_t out2in;snat_session_key_t in2out;u32 flags;u32 per_user_index;u32 per_user_list_head_index;f64 last_heard;u64 total_bytes;u32 total_pkts;u32 outside_address_index;ip4_address_t ext_host_addr;u16 ext_host_port;ip4_address_t ext_host_nat_addr;u16 ext_host_nat_port;u8 state;u32 i2o_fin_seq;u32 o2i_fin_seq;}) snat_session_t
ip4_address_t addr
Definition: nat.h:51
u32 sw_if_index
Definition: nat.h:254
snat_user_t * nat_user_get_or_create(snat_main_t *sm, ip4_address_t *addr, u32 fib_index, u32 thread_index)
Definition: nat.c:297
void increment_v4_address(ip4_address_t *a)
Definition: nat.c:739
u32 tcp_transitory_timeout
Definition: nat.h:403
ip4_address_t r_addr
Definition: nat.h:66
u32 * auto_add_sw_if_indices
Definition: nat.h:357
void nat44_add_del_address_dpo(ip4_address_t addr, u8 is_add)
Definition: nat.c:2363
u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Get address and port values to be used for ICMP packet translation and create session if needed...
Definition: in2out.c:468
u32 num_workers
Definition: nat.h:322
Definition: nat.h:233
u32 first_worker_index
Definition: nat.h:323
snat_get_worker_function_t * worker_out2in_cb
Definition: nat.h:326
ip4_address_t l_addr
Definition: nat.h:259
snat_icmp_match_function_t * icmp_match_out2in_cb
Definition: nat.h:320
IPv4 main type.
Definition: ip4.h:95
vlib_log_class_t log_class
Definition: nat.h:410
vhost_vring_state_t state
Definition: vhost-user.h:82
u64 as_u64
Definition: nat.h:97
vlib_node_registration_t snat_out2in_worker_handoff_node
(constructor) VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node)
Definition: out2in.c:3628
ip4_address_t addr
Definition: nat.h:94
ip4_address_t in_addr
Definition: nat.h:213
u32 fq_in2out_index
Definition: nat.h:367
u32 out2in_node_index
Definition: nat.h:374
ip4_address_t addr
Definition: nat.h:195
snat_address_t * twice_nat_addresses
Definition: nat.h:354
u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Get address and port values to be used for ICMP packet translation.
Definition: out2in.c:404
format_function_t format_snat_session
Definition: nat.h:471
struct _vlib_node_registration vlib_node_registration_t
vlib_node_registration_t nat44_ed_hairpin_dst_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_hairpin_dst_node)
Definition: in2out.c:123
twice_nat_type_t
Definition: nat.h:231
u16 msg_id_base
Definition: nat.h:407
u16 ports_per_host
Definition: nat.h:218
u32 * workers
Definition: nat.h:324
u64 uword
Definition: types.h:112
snat_main_per_thread_data_t * per_thread_data
Definition: nat.h:331
u32 icmp_match_in2out_ed(snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Definition: in2out.c:2571
snat_protocol_t
Definition: nat.h:107
snat_det_out_key_t out
Definition: nat.h:207
u32 fib_index
Definition: nat.h:95
snat_address_t * addresses
Definition: nat.h:347
u32 in2out_node_index
Definition: nat.h:372
format_function_t format_snat_user
Definition: nat.h:468
snat_static_map_resolve_t * to_resolve
Definition: nat.h:361
vlib_node_registration_t snat_in2out_worker_handoff_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node)
Definition: in2out.c:110
vlib_node_registration_t snat_in2out_fast_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_fast_node)
Definition: in2out.c:109
u8 forwarding_enabled
Definition: nat.h:381
u32 translation_memory_size
Definition: nat.h:390
int snat_interface_add_del_output_feature(u32 sw_if_index, u8 is_inside, int is_del)
Definition: nat.c:1790
u32 ses_num
Definition: nat.h:219
vlib_node_registration_t nat44_ed_in2out_output_worker_handoff_node
clib_bihash_16_8_t in2out_ed
Definition: nat.h:278
vhost_vring_addr_t addr
Definition: vhost-user.h:83
u8 endpoint_dependent
Definition: nat.h:388
vlib_node_registration_t snat_in2out_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_node)
Definition: in2out.c:107
u8 * format_snat_protocol(u8 *s, va_list *args)
Definition: nat.c:2400
u32 flags
Definition: vhost-user.h:77
vlib_node_registration_t nat44_ed_in2out_output_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_in2out_output_node)
Definition: in2out.c:121
ip_lookup_main_t * ip4_lookup_main
Definition: nat.h:416
u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
Get address and port values to be used for ICMP packet translation.
Definition: in2out.c:572
snat_session_t * sessions
Definition: nat.h:287
u32 cached_ip4_address
Definition: nat.h:476
snat_icmp_match_function_t * icmp_match_in2out_cb
Definition: nat.h:319
clib_bihash_8_8_t static_mapping_by_local
Definition: nat.h:334
int nat44_del_session(snat_main_t *sm, ip4_address_t *addr, u16 port, snat_protocol_t proto, u32 vrf_id, int is_in)
Definition: nat.c:3330
u32 fib_index
Definition: nat.h:196
snat_interface_t * interfaces
Definition: nat.h:343
u32 tcp_established_timeout
Definition: nat.h:402