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Vector Packet Processing
nat.h
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1 /*
2  * Copyright (c) 2016 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /**
16  * @file NAT plugin global declarations
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 /* default session timeouts */
34 #define SNAT_UDP_TIMEOUT 300
35 #define SNAT_TCP_TRANSITORY_TIMEOUT 240
36 #define SNAT_TCP_ESTABLISHED_TIMEOUT 7440
37 #define SNAT_ICMP_TIMEOUT 60
38 
39 /* number of worker handoff frame queue elements */
40 #define NAT_FQ_NELTS 64
41 
42 /* NAT buffer flags */
43 #define SNAT_FLAG_HAIRPINNING (1 << 0)
44 
45 /* session key (4-tuple) */
46 typedef struct
47 {
48  union
49  {
50  struct
51  {
54  u16 protocol:3, fib_index:13;
55  };
57  };
59 
60 /* endpoint-dependent session key (6-tuple) */
61 typedef struct
62 {
63  union
64  {
65  struct
66  {
69  u32 proto:8, fib_index:24;
72  };
73  u64 as_u64[2];
74  };
76 
77 /* deterministic session outside key */
78 typedef struct
79 {
80  union
81  {
82  struct
83  {
87  };
89  };
91 
92 /* user (internal host) key */
93 typedef struct
94 {
95  union
96  {
97  struct
98  {
101  };
103  };
105 
106 typedef struct
107 {
112 
113 /* External address and port allocation modes */
114 #define foreach_nat_addr_and_port_alloc_alg \
115  _(0, DEFAULT, "default") \
116  _(1, MAPE, "map-e") \
117  _(2, RANGE, "port-range")
118 
119 typedef enum
120 {
121 #define _(v, N, s) NAT_ADDR_AND_PORT_ALLOC_ALG_##N = v,
123 #undef _
125 
126 
127 /* Supported L4 protocols */
128 #define foreach_snat_protocol \
129  _(UDP, 0, udp, "udp") \
130  _(TCP, 1, tcp, "tcp") \
131  _(ICMP, 2, icmp, "icmp")
132 
133 typedef enum
134 {
135 #define _(N, i, n, s) SNAT_PROTOCOL_##N = i,
137 #undef _
139 
140 
141 /* Session state */
142 #define foreach_snat_session_state \
143  _(0, UNKNOWN, "unknown") \
144  _(1, UDP_ACTIVE, "udp-active") \
145  _(2, TCP_SYN_SENT, "tcp-syn-sent") \
146  _(3, TCP_ESTABLISHED, "tcp-established") \
147  _(4, TCP_FIN_WAIT, "tcp-fin-wait") \
148  _(5, TCP_CLOSE_WAIT, "tcp-close-wait") \
149  _(6, TCP_CLOSING, "tcp-closing") \
150  _(7, TCP_LAST_ACK, "tcp-last-ack") \
151  _(8, TCP_CLOSED, "tcp-closed") \
152  _(9, ICMP_ACTIVE, "icmp-active")
153 
154 typedef enum
155 {
156 #define _(v, N, s) SNAT_SESSION_##N = v,
158 #undef _
160 
161 /* Endpoint dependent TCP session state */
162 #define NAT44_SES_I2O_FIN 1
163 #define NAT44_SES_O2I_FIN 2
164 #define NAT44_SES_I2O_FIN_ACK 4
165 #define NAT44_SES_O2I_FIN_ACK 8
166 #define NAT44_SES_I2O_SYN 16
167 #define NAT44_SES_O2I_SYN 32
168 #define NAT44_SES_RST 64
169 
170 /* Session flags */
171 #define SNAT_SESSION_FLAG_STATIC_MAPPING 1
172 #define SNAT_SESSION_FLAG_UNKNOWN_PROTO 2
173 #define SNAT_SESSION_FLAG_LOAD_BALANCING 4
174 #define SNAT_SESSION_FLAG_TWICE_NAT 8
175 #define SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT 16
176 #define SNAT_SESSION_FLAG_FWD_BYPASS 32
177 #define SNAT_SESSION_FLAG_AFFINITY 64
178 #define SNAT_SESSION_FLAG_OUTPUT_FEATURE 128
179 
180 /* NAT interface flags */
181 #define NAT_INTERFACE_FLAG_IS_INSIDE 1
182 #define NAT_INTERFACE_FLAG_IS_OUTSIDE 2
183 
184 /* Static mapping flags */
185 #define NAT_STATIC_MAPPING_FLAG_ADDR_ONLY 1
186 #define NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY 2
187 #define NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT 4
188 #define NAT_STATIC_MAPPING_FLAG_LB 8
189 
190 /* *INDENT-OFF* */
191 typedef CLIB_PACKED(struct
192 {
193  /* Outside network key */
194  snat_session_key_t out2in;
195 
196  /* Inside network key */
197  snat_session_key_t in2out;
198 
199  /* Flags */
200  u32 flags;
201 
202  /* Per-user translations */
203  u32 per_user_index;
204  u32 per_user_list_head_index;
205 
206  /* Last heard timer */
207  f64 last_heard;
208 
209  /* Counters */
210  u64 total_bytes;
211  u32 total_pkts;
212 
213  /* External host address and port */
214  ip4_address_t ext_host_addr;
215  u16 ext_host_port;
216 
217  /* External host address and port after translation */
218  ip4_address_t ext_host_nat_addr;
219  u16 ext_host_nat_port;
220 
221  /* TCP session state */
222  u8 state;
223  u32 i2o_fin_seq;
224  u32 o2i_fin_seq;
225 
226  /* user index */
227  u32 user_index;
228 }) snat_session_t;
229 /* *INDENT-ON* */
230 
231 
232 typedef struct
233 {
239 } snat_user_t;
240 
241 typedef struct
242 {
245 /* *INDENT-OFF* */
246 #define _(N, i, n, s) \
247  u16 busy_##n##_ports; \
248  u16 * busy_##n##_ports_per_thread; \
249  uword * busy_##n##_port_bitmap;
251 #undef _
252 /* *INDENT-ON* */
253 } snat_address_t;
254 
255 typedef struct
256 {
260 
261 typedef struct
262 {
263  /* Inside network port */
265  /* Outside network address and port */
267  /* Session state */
269  /* Expire timeout */
272 
273 typedef struct
274 {
275  /* inside IP address range */
278  /* outside IP address range */
281  /* inside IP addresses / outside IP addresses */
283  /* number of ports available to internal host */
285  /* session counter */
287  /* vector of sessions */
290 
291 typedef struct
292 {
293  /* backend IP address */
295  /* backend port number */
297  /* probability of the backend to be randomly matched */
300  /* backend FIB table */
304 
305 typedef enum
306 {
307  /* twice-nat disabled */
309  /* twice-nat enabled */
311  /* twice-nat only when src IP equals dst IP after translation */
314 
315 typedef enum
316 {
317  /* no load-balancing */
319  /* load-balancing */
321  /* load-balancing with affinity */
323 } lb_nat_type_t;
324 
325 typedef struct
326 {
327  /* local IP address */
329  /* external IP address */
331  /* local port */
333  /* external port */
335  /* is twice-nat */
336  twice_nat_type_t twice_nat;
337  /* local FIB table */
340  /* protocol */
341  snat_protocol_t proto;
342  /* 0 = disabled, otherwise client IP affinity sticky time in seconds */
344  /* worker threads used by backends/local host */
346  /* opaque string tag */
347  u8 *tag;
348  /* backends for load-balancing mode */
350  /* affinity per service lis */
352  /* flags */
355 
356 typedef struct
357 {
361 
362 typedef struct
363 {
369  snat_protocol_t proto;
373  int is_add;
376  u8 *tag;
378 
379 typedef struct
380 {
381  /* Main lookup tables */
382  clib_bihash_8_8_t out2in;
383  clib_bihash_8_8_t in2out;
384 
385  /* Endpoint dependent sessions lookup tables */
386  clib_bihash_16_8_t out2in_ed;
387  clib_bihash_16_8_t in2out_ed;
388 
389  /* Find-a-user => src address lookup */
390  clib_bihash_8_8_t user_hash;
391 
392  /* User pool */
394 
395  /* Session pool */
396  snat_session_t *sessions;
397 
398  /* Pool of doubly-linked list elements */
400 
401  /* NAT thread index */
404 
405 struct snat_main_s;
406 
407 /* ICMP session match function */
409  vlib_node_runtime_t * node,
410  u32 thread_index,
411  vlib_buffer_t * b0,
412  ip4_header_t * ip0, u8 * p_proto,
413  snat_session_key_t * p_value,
414  u8 * p_dont_translate, void *d,
415  void *e);
416 
417 /* Return worker thread index for given packet */
419  u32 rx_fib_index);
420 
421 /* NAT address and port allacotaion function */
422 typedef int (nat_alloc_out_addr_and_port_function_t) (snat_address_t *
423  addresses,
424  u32 fib_index,
425  u32 thread_index,
426  snat_session_key_t * k,
428  u32 snat_thread_index);
429 
430 typedef struct snat_main_s
431 {
432  /* ICMP session match functions */
435 
436  /* Thread settings */
444 
445  /* Per thread data */
447 
448  /* Find a static mapping by local */
449  clib_bihash_8_8_t static_mapping_by_local;
450 
451  /* Find a static mapping by external */
452  clib_bihash_8_8_t static_mapping_by_external;
453 
454  /* Static mapping pool */
456 
457  /* Interface pool */
460 
461  /* Vector of outside addresses */
462  snat_address_t *addresses;
463  /* Address and port allocation function */
465  /* Address and port allocation type */
466  nat_addr_and_port_alloc_alg_t addr_and_port_alloc_alg;
467  /* Port set parameters (MAP-E) */
471  /* Port range parameters */
474 
475  /* vector of outside fibs */
477 
478  /* Vector of twice NAT addresses for extenal hosts */
479  snat_address_t *twice_nat_addresses;
480 
481  /* sw_if_indices whose intfc addresses should be auto-added */
484 
485  /* vector of interface address static mappings to resolve. */
487 
488  /* Randomize port allocation order */
490 
491  /* Worker handoff frame-queue index */
495 
496  /* in2out and out2in node index */
501 
502  /* Deterministic NAT mappings */
504 
505  /* If forwarding is enabled */
507 
508  /* Config parameters */
524 
525  /* values of various timeouts */
530 
531  /* TCP MSS clamping */
534 
535  /* counters/gauges */
538 
539  /* API message ID base */
541 
542  /* log class */
544 
545  /* convenience */
551 } snat_main_t;
552 
553 typedef struct
554 {
558 
559 typedef struct
560 {
564 
565 extern snat_main_t snat_main;
586 
587 /* format functions */
598 /* unformat functions */
600 
601 /** \brief Check if SNAT session is created from static mapping.
602  @param s SNAT session
603  @return 1 if SNAT session is created from static mapping otherwise 0
604 */
605 #define snat_is_session_static(s) (s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING)
606 
607 /** \brief Check if SNAT session for unknown protocol.
608  @param s SNAT session
609  @return 1 if SNAT session for unknown protocol otherwise 0
610 */
611 #define snat_is_unk_proto_session(s) (s->flags & SNAT_SESSION_FLAG_UNKNOWN_PROTO)
612 
613 /** \brief Check if NAT session is twice NAT.
614  @param s NAT session
615  @return 1 if NAT session is twice NAT
616 */
617 #define is_twice_nat_session(s) (s->flags & SNAT_SESSION_FLAG_TWICE_NAT)
618 
619 /** \brief Check if NAT session is load-balancing.
620  @param s NAT session
621  @return 1 if NAT session is load-balancing
622 */
623 #define is_lb_session(s) (s->flags & SNAT_SESSION_FLAG_LOAD_BALANCING)
624 
625 /** \brief Check if NAT session is forwarding bypass.
626  @param s NAT session
627  @return 1 if NAT session is load-balancing
628 */
629 #define is_fwd_bypass_session(s) (s->flags & SNAT_SESSION_FLAG_FWD_BYPASS)
630 
631 /** \brief Check if NAT session is endpoint dependent.
632  @param s NAT session
633  @return 1 if NAT session is endpoint dependent
634 */
635 #define is_ed_session(s) (s->flags & SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT)
636 
637 /** \brief Check if NAT session has affinity record.
638  @param s NAT session
639  @return 1 if NAT session has affinity record
640 */
641 #define is_affinity_sessions(s) (s->flags & SNAT_SESSION_FLAG_AFFINITY)
642 
643 /** \brief Check if NAT interface is inside.
644  @param i NAT interfce
645  @return 1 if inside interface
646 */
647 #define nat_interface_is_inside(i) i->flags & NAT_INTERFACE_FLAG_IS_INSIDE
648 
649 /** \brief Check if NAT interface is outside.
650  @param i NAT interfce
651  @return 1 if outside interface
652 */
653 #define nat_interface_is_outside(i) i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE
654 
655 /** \brief Check if NAT44 endpoint-dependent TCP session is closed.
656  @param s NAT session
657  @return 1 if session is closed
658 */
659 #define nat44_is_ses_closed(s) s->state == 0xf
660 
661 /** \brief Check if NAT static mapping is address only (1:1NAT).
662  @param sm NAT static mapping
663  @return 1 if 1:1NAT, 0 if 1:1NAPT
664 */
665 #define is_addr_only_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_ADDR_ONLY)
666 
667 /** \brief Check if NAT static mapping match only out2in direction.
668  @param sm NAT static mapping
669  @return 1 if rule match only out2in direction
670 */
671 #define is_out2in_only_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY)
672 
673 /** \brief Check if NAT static mapping is identity NAT.
674  @param sm NAT static mapping
675  @return 1 if identity NAT
676 */
677 #define is_identity_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT)
678 
679 /** \brief Check if NAT static mapping is load-balancing.
680  @param sm NAT static mapping
681  @return 1 if load-balancing
682 */
683 #define is_lb_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_LB)
684 
685 /** \brief Check if client initiating TCP connection (received SYN from client)
686  @param t TCP header
687  @return 1 if client initiating TCP connection
688 */
689 #define tcp_is_init(t) ((t->flags & TCP_FLAG_SYN) && !(t->flags & TCP_FLAG_ACK))
690 
691 /* logging */
692 #define nat_log_err(...) \
693  vlib_log(VLIB_LOG_LEVEL_ERR, snat_main.log_class, __VA_ARGS__)
694 #define nat_log_warn(...) \
695  vlib_log(VLIB_LOG_LEVEL_WARNING, snat_main.log_class, __VA_ARGS__)
696 #define nat_log_notice(...) \
697  vlib_log(VLIB_LOG_LEVEL_NOTICE, snat_main.log_class, __VA_ARGS__)
698 #define nat_log_info(...) \
699  vlib_log(VLIB_LOG_LEVEL_INFO, snat_main.log_class, __VA_ARGS__)
700 #define nat_log_debug(...)\
701  vlib_log(VLIB_LOG_LEVEL_DEBUG, snat_main.log_class, __VA_ARGS__)
702 
703 /* ICMP session match functions */
705  u32 thread_index, vlib_buffer_t * b0,
706  ip4_header_t * ip0, u8 * p_proto,
707  snat_session_key_t * p_value,
708  u8 * p_dont_translate, void *d, void *e);
710  u32 thread_index, vlib_buffer_t * b0,
711  ip4_header_t * ip0, u8 * p_proto,
712  snat_session_key_t * p_value,
713  u8 * p_dont_translate, void *d, void *e);
715  u32 thread_index, vlib_buffer_t * b0,
716  ip4_header_t * ip0, u8 * p_proto,
717  snat_session_key_t * p_value,
718  u8 * p_dont_translate, void *d, void *e);
720  u32 thread_index, vlib_buffer_t * b0,
721  ip4_header_t * ip0, u8 * p_proto,
722  snat_session_key_t * p_value,
723  u8 * p_dont_translate, void *d, void *e);
724 
725 /* ICMP deterministic NAT session match functions */
727  u32 thread_index, vlib_buffer_t * b0,
728  ip4_header_t * ip0, u8 * p_proto,
729  snat_session_key_t * p_value,
730  u8 * p_dont_translate, void *d, void *e);
732  u32 thread_index, vlib_buffer_t * b0,
733  ip4_header_t * ip0, u8 * p_proto,
734  snat_session_key_t * p_value,
735  u8 * p_dont_translate, void *d, void *e);
736 
737 /* ICMP endpoint-dependent session match functions */
739  u32 thread_index, vlib_buffer_t * b0,
740  ip4_header_t * ip0, u8 * p_proto,
741  snat_session_key_t * p_value,
742  u8 * p_dont_translate, void *d, void *e);
744  u32 thread_index, vlib_buffer_t * b0,
745  ip4_header_t * ip0, u8 * p_proto,
746  snat_session_key_t * p_value,
747  u8 * p_dont_translate, void *d, void *e);
748 
750  icmp46_header_t * icmp0, u32 sw_if_index0, u32 rx_fib_index0,
751  vlib_node_runtime_t * node, u32 next0, u32 thread_index,
752  void *d, void *e);
753 
755  icmp46_header_t * icmp0, u32 sw_if_index0, u32 rx_fib_index0,
756  vlib_node_runtime_t * node, u32 next0, u32 thread_index,
757  void *d, void *e);
758 
759 /* hairpinning functions */
761  ip4_header_t * ip0, icmp46_header_t * icmp0,
762  int is_ed);
764  ip4_header_t * ip);
766  ip4_header_t * ip);
768  ip4_header_t * ip0, udp_header_t * udp0,
769  tcp_header_t * tcp0, u32 proto0, int is_ed);
771  ip4_header_t * ip0, u16 sport, u16 dport,
772  u32 proto0, int is_ed);
773 
774 /* Call back functions for clib_bihash_add_or_overwrite_stale */
779 
780 /**
781  * @brief Increment IPv4 address
782  */
784 
785 /**
786  * @brief Add external address to NAT44 pool
787  *
788  * @param addr IPv4 address
789  * @param vrf_id VRF id of tenant, ~0 means independent of VRF
790  * @param twice_nat 1 if twice NAT address
791  *
792  * @return 0 on success, non-zero value otherwise
793  */
794 int snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id,
795  u8 twice_nat);
796 
797 /**
798  * @brief Delete external address from NAT44 pool
799  *
800  * @param addr IPv4 address
801  * @param delete_sm 1 if delete static mapping using address
802  * @param twice_nat 1 if twice NAT address
803  *
804  * @return 0 on success, non-zero value otherwise
805  */
806 int snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm,
807  u8 twice_nat);
808 
809 /**
810  * @brief Add/delete external address to FIB DPO (out2in DPO mode)
811  *
812  * @param addr IPv4 address
813  * @param is_add 1 = add, 0 = delete
814  *
815  * @return 0 on success, non-zero value otherwise
816  */
818 
819 /**
820  * @brief Add/delete NAT44 static mapping
821  *
822  * @param l_addr local IPv4 address
823  * @param e_addr external IPv4 address
824  * @param l_port local port number
825  * @param e_port external port number
826  * @param vrf_id local VRF ID
827  * @param addr_only 1 = 1:1NAT, 0 = 1:1NAPT
828  * @param sw_if_index use interface address as external IPv4 address
829  * @param proto L4 protocol
830  * @param is_add 1 = add, 0 = delete
831  * @param twice_nat twice-nat mode
832  * @param out2in_only if 1 rule match only out2in direction
833  * @param tag opaque string tag
834  * @param identity_nat identity NAT
835  *
836  * @return 0 on success, non-zero value otherwise
837  */
839  u16 l_port, u16 e_port, u32 vrf_id,
840  int addr_only, u32 sw_if_index,
841  snat_protocol_t proto, int is_add,
842  twice_nat_type_t twice_nat, u8 out2in_only,
843  u8 * tag, u8 identity_nat);
844 
845 /**
846  * @brief Add/delete static mapping with load-balancing (multiple backends)
847  *
848  * @param e_addr external IPv4 address
849  * @param e_port external port number
850  * @param proto L4 protocol
851  * @param locals list of local backends
852  * @param is_add 1 = add, 0 = delete
853  * @param twice_nat twice-nat mode
854  * @param out2in_only if 1 rule match only out2in direction
855  * @param tag opaque string tag
856  * @param affinity 0 = disabled, otherwise client IP affinity sticky time
857  *
858  * @return 0 on success, non-zero value otherwise
859  */
861  snat_protocol_t proto,
862  nat44_lb_addr_port_t * locals, u8 is_add,
863  twice_nat_type_t twice_nat,
864  u8 out2in_only, u8 * tag, u32 affinity);
865 
867  ip4_address_t l_addr, u16 l_port,
868  snat_protocol_t proto, u32 vrf_id,
869  u8 probability, u8 is_add);
870 
872 
873 /**
874  * @brief Set NAT plugin workers
875  *
876  * @param bitmap NAT workers bitmap
877  *
878  * @return 0 on success, non-zero value otherwise
879  */
880 int snat_set_workers (uword * bitmap);
881 
882 /**
883  * @brief Enable/disable NAT44 feature on the interface
884  *
885  * @param sw_if_index software index of the interface
886  * @param is_inside 1 = inside, 0 = outside
887  * @param is_del 1 = delete, 0 = add
888  *
889  * @return 0 on success, non-zero value otherwise
890  */
891 int snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del);
892 
893 /**
894  * @brief Enable/disable NAT44 output feature on the interface (postrouting NAT)
895  *
896  * @param sw_if_index software index of the interface
897  * @param is_inside 1 = inside, 0 = outside
898  * @param is_del 1 = delete, 0 = add
899  *
900  * @return 0 on success, non-zero value otherwise
901  */
903  int is_del);
904 
905 /**
906  * @brief Add/delete NAT44 pool address from specific interfce
907  *
908  * @param sw_if_index software index of the interface
909  * @param is_del 1 = delete, 0 = add
910  * @param twice_nat 1 = twice NAT address for extenal hosts
911  *
912  * @return 0 on success, non-zero value otherwise
913  */
915  u8 twice_nat);
916 
917 /**
918  * @brief Delete NAT44 session
919  *
920  * @param addr IPv4 address
921  * @param port L4 port number
922  * @param proto L4 protocol
923  * @param vrf_id VRF ID
924  * @param is_in 1 = inside network addres and por pair, 0 = outside
925  *
926  * @return 0 on success, non-zero value otherwise
927  */
929  snat_protocol_t proto, u32 vrf_id, int is_in);
930 
931 /**
932  * @brief Delete NAT44 endpoint-dependent session
933  *
934  * @param addr IPv4 address
935  * @param port L4 port number
936  * @param proto L4 protocol
937  * @param vrf_id VRF ID
938  * @param is_in 1 = inside network addres and por pair, 0 = outside
939  *
940  * @return 0 on success, non-zero value otherwise
941  */
943  ip4_address_t * eh_addr, u16 eh_port, u8 proto,
944  u32 vrf_id, int is_in);
945 
946 /**
947  * @brief Free NAT44 session data (lookup keys, external addrres port)
948  *
949  * @param s NAT session
950  * @param thread_index thread index
951  */
952 void nat_free_session_data (snat_main_t * sm, snat_session_t * s,
953  u32 thread_index);
954 
955 /**
956  * @brief Find or create NAT user
957  *
958  * @param addr IPv4 address
959  * @param fib_index FIB table index
960  * @param thread_index thread index
961  *
962  * @return NAT user data structure on success otherwise zero value
963  */
965  u32 fib_index, u32 thread_index);
966 
967 /**
968  * @brief Allocate new NAT session or recycle last used
969  *
970  * @param u NAT user
971  * @param thread_index thread index
972  *
973  * @return session data structure on success otherwise zero value
974  */
975 snat_session_t *nat_session_alloc_or_recycle (snat_main_t * sm,
976  snat_user_t * u,
977  u32 thread_index);
978 
979 /**
980  * @brief Allocate NAT endpoint-dependent session
981  *
982  * @param u NAT user
983  * @param thread_index thread index
984  *
985  * @return session data structure on success otherwise zero value
986  */
987 snat_session_t *nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u,
988  u32 thread_index, f64 now);
989 
990 /**
991  * @brief Set address and port assignment algorithm for MAP-E CE
992  *
993  * @param psid Port Set Identifier value
994  * @param psid_offset number of offset bits
995  * @param psid_length length of PSID
996  */
998  u16 psid_length);
999 
1000 /**
1001  * @brief Set address and port assignment algorithm for port range
1002  *
1003  * @param start_port beginning of the port range
1004  * @param end_port end of the port range
1005  */
1007 
1008 /**
1009  * @brief Set address and port assignment algorithm to default/standard
1010  */
1012 
1013 /**
1014  * @brief Free outside address and port pair
1015  *
1016  * @param addresses vector of outside addresses
1017  * @param thread_index thread index
1018  * @param k adddress, port and protocol
1019  */
1020 void snat_free_outside_address_and_port (snat_address_t * addresses,
1021  u32 thread_index,
1022  snat_session_key_t * k);
1023 
1024 /**
1025  * @brief Alloc outside address and port
1026  *
1027  * @param addresses vector of outside addresses
1028  * @param fib_index FIB table index
1029  * @param thread_index thread index
1030  * @param k allocated address and port pair
1031  * @param port_per_thread number of ports per threead
1032  * @param snat_thread_index NAT thread index
1033  *
1034  * @return 0 on success, non-zero value otherwise
1035  */
1036 int snat_alloc_outside_address_and_port (snat_address_t * addresses,
1037  u32 fib_index,
1038  u32 thread_index,
1039  snat_session_key_t * k,
1040  u16 port_per_thread,
1041  u32 snat_thread_index);
1042 
1043 /**
1044  * @brief Match NAT44 static mapping.
1045  *
1046  * @param match address and port to match
1047  * @param mapping external/local address and port of the matched mapping
1048  * @param by_external if 0 match by local address otherwise match by external
1049  * address
1050  * @param is_addr_only 1 if matched mapping is address only
1051  * @param twice_nat matched mapping is twice NAT type
1052  * @param lb 1 if matched mapping is load-balanced
1053  * @param ext_host_addr external host address
1054  *
1055  * @returns 0 if match found otherwise 1.
1056  */
1058  snat_session_key_t match,
1059  snat_session_key_t * mapping,
1060  u8 by_external,
1061  u8 * is_addr_only,
1062  twice_nat_type_t * twice_nat,
1063  lb_nat_type_t * lb,
1064  ip4_address_t * ext_host_addr,
1065  u8 * is_identity_nat);
1066 
1067 /**
1068  * @brief Add/del NAT address to FIB.
1069  *
1070  * Add the external NAT address to the FIB as receive entries. This ensures
1071  * that VPP will reply to ARP for this address and we don't need to enable
1072  * proxy ARP on the outside interface.
1073  *
1074  * @param addr IPv4 address
1075  * @param plen address prefix length
1076  * @param sw_if_index software index of the outside interface
1077  * @param is_add 0 = delete, 1 = add.
1078  */
1080  u8 p_len, u32 sw_if_index, int is_add);
1081 
1082 
1083 /*
1084  * Why is this here? Because we don't need to touch this layer to
1085  * simply reply to an icmp. We need to change id to a unique
1086  * value to NAT an echo request/reply.
1087  */
1088 
1089 typedef struct
1090 {
1094 
1095 typedef struct
1096 {
1099 
1100 #endif /* __included_nat_h__ */
1101 
1102 /*
1103  * fd.io coding-style-patch-verification: ON
1104  *
1105  * Local Variables:
1106  * eval: (c-set-style "gnu")
1107  * End:
1108  */
ip4_address_t external_addr
Definition: nat.h:330
int snat_del_address(snat_main_t *sm, ip4_address_t addr, u8 delete_sm, u8 twice_nat)
Delete external address from NAT44 pool.
Definition: nat.c:1601
u32 user_memory_size
Definition: nat.h:518
clib_error_t * snat_api_init(vlib_main_t *vm, snat_main_t *sm)
Definition: nat_api.c:3295
#define foreach_nat_addr_and_port_alloc_alg
Definition: nat.h:114
nat_outside_fib_t * outside_fibs
Definition: nat.h:476
vlib_node_registration_t snat_hairpin_src_node
(constructor) VLIB_REGISTER_NODE (snat_hairpin_src_node)
nat_addr_and_port_alloc_alg_t
Definition: nat.h:119
void nat_free_session_data(snat_main_t *sm, snat_session_t *s, u32 thread_index)
Free NAT44 session data (lookup keys, external addrres port)
Definition: nat.c:178
u32 sessions_per_user_list_head_index
Definition: nat.h:236
u32 vlib_log_class_t
Definition: log.h:21
u32 flags
Definition: vhost_user.h:115
int snat_interface_add_del(u32 sw_if_index, u8 is_inside, int is_del)
Enable/disable NAT44 feature on the interface.
Definition: nat.c:1715
u16 ext_host_port
Definition: nat.h:85
u32 icmp_out2in(snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, icmp46_header_t *icmp0, u32 sw_if_index0, u32 rx_fib_index0, vlib_node_runtime_t *node, u32 next0, u32 thread_index, void *d, void *e)
Definition: out2in.c:502
u16 out_port
Definition: nat.h:86
a
Definition: bitmap.h:538
u32 icmp_timeout
Definition: nat.h:529
u32 fq_in2out_output_index
Definition: nat.h:493
u16 start_port
Definition: nat.h:472
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...
u64 as_u64
Definition: bihash_doc.h:63
u32 nsessions
Definition: nat.h:237
#define foreach_snat_session_state
Definition: nat.h:142
unsigned long u64
Definition: types.h:89
ip4_address_t addr
Definition: nat.h:294
int snat_add_interface_address(snat_main_t *sm, u32 sw_if_index, int is_del, u8 twice_nat)
Add/delete NAT44 pool address from specific interfce.
Definition: nat.c:3298
snat_protocol_t proto
Definition: nat.h:341
u16 port_per_thread
Definition: nat.h:442
u32 nstaticsessions
Definition: nat.h:238
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:313
vlib_node_registration_t nat44_ed_in2out_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_in2out_node)
Definition: in2out_ed.c:84
format_function_t format_det_map_ses
Definition: nat.h:592
vlib_node_registration_t snat_det_out2in_node
(constructor) VLIB_REGISTER_NODE (snat_det_out2in_node)
int nat44_i2o_ed_is_idle_session_cb(clib_bihash_kv_16_8_t *kv, void *arg)
Definition: in2out_ed.c:158
vlib_node_registration_t nat44_ed_hairpin_src_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_hairpin_src_node)
u32 fib_index
Definition: nat.h:235
format_function_t format_snat_static_mapping
Definition: nat.h:589
format_function_t format_snat_key
Definition: nat.h:593
snat_det_map_t * det_maps
Definition: nat.h:503
nat_alloc_out_addr_and_port_function_t * alloc_addr_and_port
Definition: nat.h:464
u32 num_snat_thread
Definition: nat.h:443
#define foreach_snat_protocol
Definition: nat.h:128
dlist_elt_t * list_pool
Definition: nat.h:399
u8 in_plen
Definition: nat.h:277
struct _tcp_header tcp_header_t
int snat_hairpinning(snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, udp_header_t *udp0, tcp_header_t *tcp0, u32 proto0, int is_ed)
vhost_vring_addr_t addr
Definition: vhost_user.h:121
u32 proto
Definition: nat.h:69
unsigned char u8
Definition: types.h:56
u8 deterministic
Definition: nat.h:511
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_ed.c:492
u16 l_port
Definition: nat.h:70
nat44_lb_addr_port_t * locals
Definition: nat.h:349
int snat_set_workers(uword *bitmap)
Set NAT plugin workers.
Definition: nat.c:2087
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;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;u32 user_index;}) snat_session_t
u32 user_buckets
Definition: nat.h:517
double f64
Definition: types.h:142
clib_bihash_8_8_t user_hash
Definition: nat.h:390
u32 cached_sw_if_index
Definition: nat.h:561
void nat_set_alloc_addr_and_port_mape(u16 psid, u16 psid_offset, u16 psid_length)
Set address and port assignment algorithm for MAP-E CE.
Definition: nat.c:3453
u8 *() format_function_t(u8 *s, va_list *args)
Definition: format.h:48
u32 max_translations_per_user
Definition: nat.h:519
clib_bihash_8_8_t in2out
Definition: nat.h:383
u32 in2out_output_node_index
Definition: nat.h:498
u16 r_port
Definition: nat.h:71
vlib_node_registration_t snat_out2in_node
(constructor) VLIB_REGISTER_NODE (snat_out2in_node)
Definition: out2in.c:1325
ip4_address_t ext_host_addr
Definition: nat.h:84
u32 sw_if_index
Definition: vxlan_gbp.api:37
u32 translation_buckets
Definition: nat.h:514
lb_nat_type_t
Definition: nat.h:315
ip4_address_t addr
Definition: nat.h:234
int snat_add_address(snat_main_t *sm, ip4_address_t *addr, u32 vrf_id, u8 twice_nat)
Add external address to NAT44 pool.
Definition: nat.c:516
ip4_main_t * ip4_main
Definition: nat.h:548
vhost_vring_state_t state
Definition: vhost_user.h:120
unsigned int u32
Definition: types.h:88
A collection of simple counters.
Definition: counter.h:57
vlib_node_registration_t snat_in2out_output_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_output_node)
Definition: in2out.c:78
ip4_address_t local_addr
Definition: nat.h:328
vlib_node_registration_t snat_in2out_output_worker_handoff_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node)
snat_protocol_t proto
Definition: nat.h:369
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...
vlib_node_registration_t snat_out2in_fast_node
(constructor) VLIB_REGISTER_NODE (snat_out2in_fast_node)
Definition: out2in.c:1855
twice_nat_type_t twice_nat
Definition: nat.h:336
u32 max_translations
Definition: nat.h:516
u32 * auto_add_sw_if_indices_twice_nat
Definition: nat.h:483
vlib_node_registration_t nat44_ed_out2in_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_out2in_node)
Definition: out2in_ed.c:1555
vlib_node_registration_t snat_hairpin_dst_node
(constructor) VLIB_REGISTER_NODE (snat_hairpin_dst_node)
u32 fib_index
Definition: nat.h:257
u16 mss_value_net
Definition: nat.h:533
nat_addr_and_port_alloc_alg_t addr_and_port_alloc_alg
Definition: nat.h:466
clib_bihash_16_8_t out2in_ed
Definition: nat.h:386
snat_det_session_t * sessions
Definition: nat.h:288
u16 mss_clamping
Definition: nat.h:532
vlib_main_t * vlib_main
Definition: nat.h:546
unsigned short u16
Definition: types.h:57
u16 protocol
Definition: nat.h:54
u8 out2in_dpo
Definition: nat.h:512
snat_static_mapping_t * static_mappings
Definition: nat.h:455
u32 inside_fib_index
Definition: nat.h:523
u32 udp_timeout
Definition: nat.h:526
u8 static_mapping_only
Definition: nat.h:509
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)
Delete NAT44 endpoint-dependent session.
Definition: nat.c:3409
vlib_node_registration_t nat44_ed_out2in_worker_handoff_node
void nat_set_alloc_addr_and_port_default(void)
Set address and port assignment algorithm to default/standard.
Definition: nat.c:3476
int nat44_lb_static_mapping_add_del_local(ip4_address_t e_addr, u16 e_port, ip4_address_t l_addr, u16 l_port, snat_protocol_t proto, u32 vrf_id, u8 probability, u8 is_add)
Definition: nat.c:1418
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:488
clib_bihash_8_8_t static_mapping_by_external
Definition: nat.h:452
u8 psid_offset
Definition: nat.h:468
struct snat_main_s snat_main_t
u32() snat_get_worker_function_t(ip4_header_t *ip, u32 rx_fib_index)
Definition: nat.h:418
uword() unformat_function_t(unformat_input_t *input, va_list *args)
Definition: format.h:232
snat_session_t * nat_session_alloc_or_recycle(snat_main_t *sm, snat_user_t *u, u32 thread_index)
Allocate new NAT session or recycle last used.
Definition: nat.c:338
api_main_t * api_main
Definition: nat.h:550
u8 out_plen
Definition: nat.h:280
u8 psid_length
Definition: nat.h:469
u32 refcount
Definition: nat.h:258
vnet_main_t * vnet_main
Definition: nat.h:547
u32 inside_vrf_id
Definition: nat.h:522
vlib_node_registration_t nat44_ed_in2out_worker_handoff_node
Definition: nat.h:320
u32 snat_icmp_hairpinning(snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, icmp46_header_t *icmp0, int is_ed)
u32 fq_out2in_index
Definition: nat.h:494
API main structure, used by both vpp and binary API clients.
Definition: api_common.h:202
int nat44_o2i_is_idle_session_cb(clib_bihash_kv_8_8_t *kv, void *arg)
Definition: out2in.c:118
snat_interface_t * output_feature_interfaces
Definition: nat.h:459
u16 src_port
Definition: nat.h:1097
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, u8 identity_nat)
Add/delete NAT44 static mapping.
Definition: nat.c:652
snat_main_t snat_main
Definition: nat.c:38
vlib_node_registration_t snat_det_in2out_node
(constructor) VLIB_REGISTER_NODE (snat_det_in2out_node)
snat_session_state_t
Definition: nat.h:154
snat_user_t * users
Definition: nat.h:393
u32 random_seed
Definition: nat.h:489
clib_bihash_8_8_t out2in
Definition: nat.h:382
int nat44_o2i_ed_is_idle_session_cb(clib_bihash_kv_16_8_t *kv, void *arg)
Definition: out2in_ed.c:131
vlib_main_t * vm
Definition: buffer.c:301
u32 outside_vrf_id
Definition: nat.h:520
ip4_address_t l_addr
Definition: nat.h:67
u8 static_mapping_connection_tracking
Definition: nat.h:510
snat_get_worker_function_t * worker_in2out_cb
Definition: nat.h:440
u16 end_port
Definition: nat.h:473
format_function_t format_snat_static_map_to_resolve
Definition: nat.h:590
u32 error_node_index
Definition: nat.h:500
u32 sharing_ratio
Definition: nat.h:282
ip4_address_t out_addr
Definition: nat.h:279
u16 psid
Definition: nat.h:470
u32 outside_fib_index
Definition: nat.h:521
format_function_t format_nat_addr_and_port_alloc_alg
Definition: nat.h:596
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, lb_nat_type_t *lb, ip4_address_t *ext_host_addr, u8 *is_identity_nat)
Match NAT44 static mapping.
Definition: nat.c:2287
8 octet key, 8 octet key value pair
Definition: bihash_8_8.h:31
ip4_address_t addr
Definition: nat.h:52
u32 sw_if_index
Definition: nat.h:358
snat_user_t * nat_user_get_or_create(snat_main_t *sm, ip4_address_t *addr, u32 fib_index, u32 thread_index)
Find or create NAT user.
Definition: nat.c:291
void increment_v4_address(ip4_address_t *a)
Increment IPv4 address.
Definition: nat.c:600
u32 tcp_transitory_timeout
Definition: nat.h:528
ip4_address_t r_addr
Definition: nat.h:68
u32 * auto_add_sw_if_indices
Definition: nat.h:482
void nat44_add_del_address_dpo(ip4_address_t addr, u8 is_add)
Add/delete external address to FIB DPO (out2in DPO mode)
Definition: nat.c:2631
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:449
u32 num_workers
Definition: nat.h:437
Definition: nat.h:310
unformat_function_t unformat_snat_protocol
Definition: nat.h:599
u32 first_worker_index
Definition: nat.h:438
void snat_free_outside_address_and_port(snat_address_t *addresses, u32 thread_index, snat_session_key_t *k)
Free outside address and port pair.
Definition: nat.c:2249
snat_get_worker_function_t * worker_out2in_cb
Definition: nat.h:441
ip4_address_t l_addr
Definition: nat.h:364
snat_icmp_match_function_t * icmp_match_out2in_cb
Definition: nat.h:434
IPv4 main type.
Definition: ip4.h:96
vlib_log_class_t log_class
Definition: nat.h:543
u64 as_u64
Definition: nat.h:102
vlib_node_registration_t snat_out2in_worker_handoff_node
(constructor) VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node)
ip4_address_t addr
Definition: nat.h:99
ip4_address_t in_addr
Definition: nat.h:276
u32 fq_in2out_index
Definition: nat.h:492
u32 out2in_node_index
Definition: nat.h:499
format_function_t format_snat_protocol
Definition: nat.h:595
ip4_address_t addr
Definition: nat.h:243
snat_address_t * twice_nat_addresses
Definition: nat.h:479
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:441
format_function_t format_snat_session
Definition: nat.h:591
struct _vlib_node_registration vlib_node_registration_t
Definition: nat.h:318
format_function_t format_nat44_reass_trace
Definition: nat.h:597
vlib_node_registration_t nat44_ed_hairpin_dst_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_hairpin_dst_node)
vlib_simple_counter_main_t total_users
Definition: nat.h:536
void nat_hairpinning_sm_unknown_proto(snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip)
format_function_t format_static_mapping_key
Definition: nat.h:594
twice_nat_type_t
Definition: nat.h:305
u16 msg_id_base
Definition: nat.h:540
u16 ports_per_host
Definition: nat.h:284
u32 * workers
Definition: nat.h:439
u64 uword
Definition: types.h:112
snat_main_per_thread_data_t * per_thread_data
Definition: nat.h:446
int nat44_i2o_is_idle_session_cb(clib_bihash_kv_8_8_t *kv, void *arg)
Definition: in2out.c:202
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_ed.c:589
snat_protocol_t
Definition: nat.h:133
snat_det_out_key_t out
Definition: nat.h:266
u32 affinity_per_service_list_head_index
Definition: nat.h:351
u32 fib_index
Definition: nat.h:100
snat_address_t * addresses
Definition: nat.h:462
void nat_set_alloc_addr_and_port_range(u16 start_port, u16 end_port)
Set address and port assignment algorithm for port range.
Definition: nat.c:3465
u32 in2out_node_index
Definition: nat.h:497
format_function_t format_snat_user
Definition: nat.h:588
snat_static_map_resolve_t * to_resolve
Definition: nat.h:486
void nat44_ed_hairpinning_unknown_proto(snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip)
int nat44_add_del_lb_static_mapping(ip4_address_t e_addr, u16 e_port, snat_protocol_t proto, nat44_lb_addr_port_t *locals, u8 is_add, twice_nat_type_t twice_nat, u8 out2in_only, u8 *tag, u32 affinity)
Add/delete static mapping with load-balancing (multiple backends)
Definition: nat.c:1142
vlib_node_registration_t snat_in2out_worker_handoff_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node)
vlib_node_registration_t snat_in2out_fast_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_fast_node)
Definition: in2out.c:77
u8 forwarding_enabled
Definition: nat.h:506
u32 translation_memory_size
Definition: nat.h:515
int snat_alloc_outside_address_and_port(snat_address_t *addresses, u32 fib_index, u32 thread_index, snat_session_key_t *k, u16 port_per_thread, u32 snat_thread_index)
Alloc outside address and port.
Definition: nat.c:2432
int snat_interface_add_del_output_feature(u32 sw_if_index, u8 is_inside, int is_del)
Enable/disable NAT44 output feature on the interface (postrouting NAT)
Definition: nat.c:1964
u32 ses_num
Definition: nat.h:286
u32 icmp_in2out(snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, icmp46_header_t *icmp0, u32 sw_if_index0, u32 rx_fib_index0, vlib_node_runtime_t *node, u32 next0, u32 thread_index, void *d, void *e)
Definition: in2out.c:635
vlib_node_registration_t nat44_ed_in2out_output_worker_handoff_node
clib_bihash_16_8_t in2out_ed
Definition: nat.h:387
u8 endpoint_dependent
Definition: nat.h:513
u16 dst_port
Definition: udp.api:42
vlib_node_registration_t snat_in2out_node
(constructor) VLIB_REGISTER_NODE (snat_in2out_node)
Definition: in2out.c:75
vlib_node_registration_t nat44_ed_in2out_output_node
(constructor) VLIB_REGISTER_NODE (nat44_ed_in2out_output_node)
Definition: in2out_ed.c:86
vlib_simple_counter_main_t total_sessions
Definition: nat.h:537
ip_lookup_main_t * ip4_lookup_main
Definition: nat.h:549
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:566
snat_session_t * sessions
Definition: nat.h:396
u32 cached_ip4_address
Definition: nat.h:562
snat_icmp_match_function_t * icmp_match_in2out_cb
Definition: nat.h:433
snat_session_t * nat_ed_session_alloc(snat_main_t *sm, snat_user_t *u, u32 thread_index, f64 now)
Allocate NAT endpoint-dependent session.
Definition: nat.c:411
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:408
clib_bihash_8_8_t static_mapping_by_local
Definition: nat.h:449
int nat44_del_session(snat_main_t *sm, ip4_address_t *addr, u16 port, snat_protocol_t proto, u32 vrf_id, int is_in)
Delete NAT44 session.
Definition: nat.c:3366
u32 fib_index
Definition: nat.h:244
void nat44_reass_hairpinning(snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, u16 sport, u16 dport, u32 proto0, int is_ed)
snat_interface_t * interfaces
Definition: nat.h:458
u32 tcp_established_timeout
Definition: nat.h:527
int() nat_alloc_out_addr_and_port_function_t(snat_address_t *addresses, u32 fib_index, u32 thread_index, snat_session_key_t *k, u16 port_per_thread, u32 snat_thread_index)
Definition: nat.h:422