2 * Copyright (c) 2020 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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 #ifndef __included_nat44_ed_h__
17 #define __included_nat44_ed_h__
19 #include <vnet/vnet.h>
20 #include <vnet/ip/ip.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/ip/icmp46_packet.h>
23 #include <vnet/api_errno.h>
24 #include <vnet/fib/fib_source.h>
25 #include <vppinfra/elog.h>
26 #include <vppinfra/bihash_8_8.h>
27 #include <vppinfra/bihash_16_8.h>
28 #include <vppinfra/hash.h>
29 #include <vppinfra/dlist.h>
30 #include <vppinfra/error.h>
31 #include <vlibapi/api.h>
33 #include <nat/lib/lib.h>
34 #include <nat/lib/inlines.h>
36 /* default number of worker handoff frame queue elements */
37 #define NAT_FQ_NELTS_DEFAULT 64
39 /* number of attempts to get a port for ED overloading algorithm, if rolling
40 * a dice this many times doesn't produce a free port, it's treated
41 * as if there were no free ports available to conserve resources */
42 #define ED_PORT_ALLOC_ATTEMPTS (10)
44 /* system ports range is 0-1023, first user port is 1024 per
45 * https://www.rfc-editor.org/rfc/rfc6335#section-6
47 #define ED_USER_PORT_OFFSET 1024
49 /* NAT buffer flags */
50 #define SNAT_FLAG_HAIRPINNING (1 << 0)
52 /* NAT44 API Configuration flags */
53 #define foreach_nat44_config_flag \
54 _ (0x00, IS_ENDPOINT_INDEPENDENT) \
55 _ (0x01, IS_ENDPOINT_DEPENDENT) \
56 _ (0x02, IS_STATIC_MAPPING_ONLY) \
57 _ (0x04, IS_CONNECTION_TRACKING)
59 typedef enum nat44_config_flags_t_
61 #define _(n,f) NAT44_API_##f = n,
62 foreach_nat44_config_flag
64 } nat44_config_flags_t;
77 NAT_NEXT_IN2OUT_ED_FAST_PATH,
78 NAT_NEXT_IN2OUT_ED_SLOW_PATH,
79 NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH,
80 NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH,
81 NAT_NEXT_OUT2IN_ED_FAST_PATH,
82 NAT_NEXT_OUT2IN_ED_SLOW_PATH,
83 NAT_NEXT_IN2OUT_CLASSIFY,
84 NAT_NEXT_OUT2IN_CLASSIFY,
94 #define foreach_nat_in2out_ed_error \
95 _ (UNSUPPORTED_PROTOCOL, "unsupported protocol") \
96 _ (OUT_OF_PORTS, "out of ports") \
97 _ (BAD_ICMP_TYPE, "unsupported ICMP type") \
98 _ (MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \
99 _ (NON_SYN, "non-SYN packet try to create session") \
100 _ (TRNSL_FAILED, "couldn't translate packet")
104 #define _(sym,str) NAT_IN2OUT_ED_ERROR_##sym,
105 foreach_nat_in2out_ed_error
107 NAT_IN2OUT_ED_N_ERROR,
108 } nat_in2out_ed_error_t;
110 #define foreach_nat_out2in_ed_error \
111 _ (UNSUPPORTED_PROTOCOL, "unsupported protocol") \
112 _ (OUT_OF_PORTS, "out of ports") \
113 _ (BAD_ICMP_TYPE, "unsupported ICMP type") \
114 _ (NO_TRANSLATION, "no translation") \
115 _ (MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \
116 _ (NON_SYN, "non-SYN packet try to create session") \
117 _ (TCP_CLOSED, "drops due to TCP in transitory timeout") \
118 _ (HASH_ADD_FAILED, "hash table add failed") \
119 _ (TRNSL_FAILED, "couldn't translate packet")
123 #define _(sym,str) NAT_OUT2IN_ED_ERROR_##sym,
124 foreach_nat_out2in_ed_error
126 NAT_OUT2IN_ED_N_ERROR,
127 } nat_out2in_ed_error_t;
131 NAT44_ED_TCP_FLAG_FIN = 0,
132 NAT44_ED_TCP_FLAG_SYN,
133 NAT44_ED_TCP_FLAG_RST,
134 NAT44_ED_TCP_FLAG_ACK,
136 } nat44_ed_tcp_flag_e;
140 NAT44_ED_DIR_I2O = 0,
145 /* Endpoint dependent TCP session state */
148 NAT44_ED_TCP_STATE_CLOSED = 0,
149 NAT44_ED_TCP_STATE_ESTABLISHED,
150 NAT44_ED_TCP_STATE_CLOSING,
151 NAT44_ED_TCP_N_STATE,
152 } nat44_ed_tcp_state_e;
154 format_function_t format_ed_session_kvp;
155 format_function_t format_snat_session;
156 format_function_t format_snat_static_mapping;
157 format_function_t format_snat_static_map_to_resolve;
158 format_function_t format_nat_ed_translation_error;
159 format_function_t format_nat_6t_flow;
160 format_function_t format_nat_6t;
161 format_function_t format_nat44_ed_tcp_state;
164 #define SNAT_SESSION_FLAG_STATIC_MAPPING (1 << 0)
165 #define SNAT_SESSION_FLAG_LOAD_BALANCING (1 << 2)
166 #define SNAT_SESSION_FLAG_TWICE_NAT (1 << 3)
167 #define SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT (1 << 4)
168 #define SNAT_SESSION_FLAG_FWD_BYPASS (1 << 5)
169 #define SNAT_SESSION_FLAG_AFFINITY (1 << 6)
170 #define SNAT_SESSION_FLAG_EXACT_ADDRESS (1 << 7)
171 #define SNAT_SESSION_FLAG_HAIRPINNING (1 << 8)
173 /* NAT interface flags */
174 #define NAT_INTERFACE_FLAG_IS_INSIDE 1
175 #define NAT_INTERFACE_FLAG_IS_OUTSIDE 2
177 /* Static mapping flags */
178 #define NAT_SM_FLAG_SELF_TWICE_NAT (1 << 1)
179 #define NAT_SM_FLAG_TWICE_NAT (1 << 2)
180 #define NAT_SM_FLAG_IDENTITY_NAT (1 << 3)
181 #define NAT_SM_FLAG_ADDR_ONLY (1 << 4)
182 #define NAT_SM_FLAG_EXACT_ADDRESS (1 << 5)
183 #define NAT_SM_FLAG_OUT2IN_ONLY (1 << 6)
184 #define NAT_SM_FLAG_LB (1 << 7)
185 #define NAT_SM_FLAG_SWITCH_ADDRESS (1 << 8)
187 typedef CLIB_PACKED(struct
189 // number of sessions in this vrf
195 // is this vrf expired
197 }) per_vrf_sessions_t;
203 ip4_address_t saddr, daddr;
204 u16 sport; // ICMP id for ICMP case
213 STATIC_ASSERT_SIZEOF (nat_6t_t, 2 * sizeof (u64));
217 #define NAT_FLOW_OP_SADDR_REWRITE (1 << 1)
218 #define NAT_FLOW_OP_SPORT_REWRITE (1 << 2)
219 #define NAT_FLOW_OP_DADDR_REWRITE (1 << 3)
220 #define NAT_FLOW_OP_DPORT_REWRITE (1 << 4)
221 #define NAT_FLOW_OP_ICMP_ID_REWRITE (1 << 5)
222 #define NAT_FLOW_OP_TXFIB_REWRITE (1 << 6)
227 ip4_address_t saddr, daddr;
238 void nat44_ed_forwarding_enable_disable (u8 is_enable);
241 nat_6t_flow_saddr_rewrite_set (nat_6t_flow_t *f, u32 saddr)
243 f->ops |= NAT_FLOW_OP_SADDR_REWRITE;
244 f->rewrite.saddr.as_u32 = saddr;
248 nat_6t_flow_daddr_rewrite_set (nat_6t_flow_t *f, u32 daddr)
250 f->ops |= NAT_FLOW_OP_DADDR_REWRITE;
251 f->rewrite.daddr.as_u32 = daddr;
255 nat_6t_flow_sport_rewrite_set (nat_6t_flow_t *f, u32 sport)
257 f->ops |= NAT_FLOW_OP_SPORT_REWRITE;
258 f->rewrite.sport = sport;
262 nat_6t_flow_dport_rewrite_set (nat_6t_flow_t *f, u32 dport)
264 f->ops |= NAT_FLOW_OP_DPORT_REWRITE;
265 f->rewrite.dport = dport;
269 nat_6t_flow_txfib_rewrite_set (nat_6t_flow_t *f, u32 tx_fib_index)
271 f->ops |= NAT_FLOW_OP_TXFIB_REWRITE;
272 f->rewrite.fib_index = tx_fib_index;
276 nat_6t_flow_icmp_id_rewrite_set (nat_6t_flow_t *f, u16 id)
278 f->ops |= NAT_FLOW_OP_ICMP_ID_REWRITE;
279 f->rewrite.icmp_id = id;
282 typedef CLIB_PACKED(struct
284 /* Outside network tuple */
292 /* Inside network tuple */
308 /* head of LRU list in which this session is tracked */
310 /* index in global LRU list */
314 /* Last heard timer */
317 /* Last HA refresh */
318 f64 ha_last_refreshed;
324 /* External host address and port */
325 ip4_address_t ext_host_addr;
328 /* External host address and port after translation */
329 ip4_address_t ext_host_nat_addr;
330 u16 ext_host_nat_port;
332 /* TCP session state */
333 u8 tcp_flags[NAT44_ED_N_DIR];
334 nat44_ed_tcp_state_e tcp_state;
336 /* per vrf sessions index */
337 u32 per_vrf_sessions_index;
353 /* backend IP address */
355 /* backend port number */
357 /* probability of the backend to be randomly matched */
360 /* backend FIB table */
363 } nat44_lb_addr_port_t;
367 /* twice-nat disabled */
369 /* twice-nat enabled */
371 /* twice-nat only when src IP equals dst IP after translation */
377 /* no load-balancing */
381 /* load-balancing with affinity */
387 /* preferred pool address */
388 ip4_address_t pool_addr;
389 /* local IP address */
390 ip4_address_t local_addr;
391 /* external IP address */
392 ip4_address_t external_addr;
397 /* local FIB table */
402 /* 0 = disabled, otherwise client IP affinity sticky time in seconds */
404 /* worker threads used by backends/local host */
406 /* opaque string tag */
408 /* backends for load-balancing mode */
409 nat44_lb_addr_port_t *locals;
410 /* affinity per service lis */
411 u32 affinity_per_service_list_head_index;
414 } snat_static_mapping_t;
425 ip4_address_t l_addr;
426 ip4_address_t pool_addr;
434 } snat_static_mapping_resolve_t;
441 } snat_address_resolve_t;
448 } snat_fib_entry_reg_t;
453 snat_session_t *sessions;
455 /* Pool of doubly-linked list elements */
456 dlist_elt_t *list_pool;
458 /* LRU session list - head is stale, tail is fresh */
459 dlist_elt_t *lru_pool;
460 u32 tcp_trans_lru_head_index;
461 u32 tcp_estab_lru_head_index;
462 u32 udp_lru_head_index;
463 u32 icmp_lru_head_index;
464 u32 unk_proto_lru_head_index;
466 /* NAT thread index */
467 u32 snat_thread_index;
469 /* real thread index */
472 per_vrf_sessions_t *per_vrf_sessions_vec;
474 } snat_main_per_thread_data_t;
478 u32 nat44_ed_get_in2out_worker_index (vlib_buffer_t *b, ip4_header_t *ip,
479 u32 rx_fib_index, u8 is_output);
480 u32 nat44_ed_get_out2in_worker_index (vlib_buffer_t *b, ip4_header_t *ip,
481 u32 rx_fib_index, u8 is_output);
483 /* Return worker thread index for given packet */
484 /* NAT address and port allocation function */
485 typedef int (nat_alloc_out_addr_and_port_function_t) (
486 snat_address_t *addresses, u32 fib_index, u32 thread_index,
487 ip_protocol_t proto, ip4_address_t *addr, u16 *port, u16 port_per_thread,
488 u32 snat_thread_index);
490 typedef struct nat_fib_s
496 typedef struct vrf_route_s
502 typedef struct vrf_table_s
509 typedef struct snat_main_s
511 /* Thread settings */
513 u32 first_worker_index;
517 /* Per thread data */
518 snat_main_per_thread_data_t *per_thread_data;
520 /* Static mapping pool */
521 snat_static_mapping_t *static_mappings;
523 /* Endpoint independent lookup tables */
524 clib_bihash_8_8_t in2out;
525 clib_bihash_8_8_t out2in;
527 /* Endpoint dependent lookup table */
528 clib_bihash_16_8_t flow_hash;
534 u32 inside_fib_index;
537 u32 outside_fib_index;
539 // vector of outside fibs
540 nat_fib_t *outside_fibs;
542 // VRF routing table for dynamic sessions
543 vrf_table_t *vrf_tables;
546 snat_interface_t *interfaces;
547 snat_interface_t *output_feature_interfaces;
548 // broken api backward compatibility
549 snat_interface_t *output_feature_dummy_interfaces;
551 /* Vector of outside addresses */
552 snat_address_t *addresses;
553 /* Vector of twice NAT addresses for external hosts */
554 snat_address_t *twice_nat_addresses;
556 /* first interface address should be auto-added */
557 snat_address_resolve_t *addr_to_resolve;
559 /* vector of fib entries */
560 snat_fib_entry_reg_t *fib_entry_reg;
562 /* vector of interface address static mappings to resolve. */
563 snat_static_mapping_resolve_t *sm_to_resolve;
565 /* Randomize port allocation order */
568 /* Worker handoff frame-queue index */
570 u32 fq_in2out_output_index;
573 nat44_config_t rconfig;
575 /* If forwarding is enabled */
576 u8 forwarding_enabled;
578 /* Is translation memory size calculated or user defined */
579 u8 translation_memory_size_set;
581 u32 translation_buckets;
582 u32 max_translations_per_thread;
583 u32 *max_translations_per_fib;
585 nat_timeouts_t timeouts;
587 /* TCP MSS clamping */
591 vlib_simple_counter_main_t total_sessions;
592 u32 max_cfg_sessions_gauge; /* Index of max configured sessions gauge in
595 #define _(x) vlib_simple_counter_main_t x;
624 vlib_simple_counter_main_t hairpinning;
628 /* API message ID base */
632 vlib_log_class_t log_class;
637 ip4_main_t *ip4_main;
639 fib_source_t fib_src_hi;
640 fib_source_t fib_src_low;
642 /* number of worker handoff frame queue elements */
643 u32 frame_queue_nelts;
645 /* nat44 plugin enabled */
648 /* TCP session state machine table:
649 * first dimension is possible states
650 * second dimension is direction (in2out/out2in)
651 * third dimension is TCP flag (SYN, RST, FIN)
653 * value is next state to change to
655 nat44_ed_tcp_state_e tcp_state_change_table[NAT44_ED_TCP_N_STATE]
657 [NAT44_ED_TCP_N_FLAG];
664 } nat44_is_idle_session_ctx_t;
668 u32 cached_sw_if_index;
669 uword *cached_presence_by_ip4_address;
673 * Why is this here? Because we don't need to touch this layer to
674 * simply reply to an icmp. We need to change id to a unique
675 * value to NAT an echo request/reply.
678 extern snat_main_t snat_main;
680 extern vlib_node_registration_t nat_default_node;
681 extern vlib_node_registration_t nat_pre_in2out_node;
682 extern vlib_node_registration_t nat_pre_out2in_node;
684 extern vlib_node_registration_t nat44_ed_in2out_node;
685 extern vlib_node_registration_t nat44_ed_in2out_output_node;
686 extern vlib_node_registration_t nat44_ed_out2in_node;
688 extern vlib_node_registration_t snat_in2out_worker_handoff_node;
689 extern vlib_node_registration_t snat_in2out_output_worker_handoff_node;
690 extern vlib_node_registration_t snat_out2in_worker_handoff_node;
692 /** \brief Check if SNAT session is created from static mapping.
693 @param s SNAT session
694 @return true if SNAT session is created from static mapping otherwise 0
697 nat44_ed_is_session_static (snat_session_t *s)
699 return s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING;
702 /** \brief Check if NAT session is twice NAT.
704 @return true if NAT session is twice NAT
707 nat44_ed_is_twice_nat_session (snat_session_t *s)
709 return s->flags & SNAT_SESSION_FLAG_TWICE_NAT;
712 /** \brief Check if NAT session is load-balancing.
714 @return true if NAT session is load-balancing
717 nat44_ed_is_lb_session (snat_session_t *s)
719 return s->flags & SNAT_SESSION_FLAG_LOAD_BALANCING;
722 /** \brief Check if NAT session is forwarding bypass.
724 @return true if NAT session is load-balancing
727 na44_ed_is_fwd_bypass_session (snat_session_t *s)
729 return s->flags & SNAT_SESSION_FLAG_FWD_BYPASS;
732 /** \brief Check if NAT session has affinity record.
734 @return true if NAT session has affinity record
737 nat44_ed_is_affinity_session (snat_session_t *s)
739 return s->flags & SNAT_SESSION_FLAG_AFFINITY;
742 /** \brief Check if exact pool address should be used.
743 @param s SNAT session
744 @return true if exact pool address
747 nat44_ed_is_exact_address_session (snat_session_t *s)
749 return s->flags & SNAT_SESSION_FLAG_EXACT_ADDRESS;
752 /** \brief Check if NAT interface is inside.
753 @param i NAT interface
754 @return true if inside interface
757 nat44_ed_is_interface_inside (snat_interface_t *i)
759 return i->flags & NAT_INTERFACE_FLAG_IS_INSIDE;
762 /** \brief Check if NAT interface is outside.
763 @param i NAT interface
764 @return true if outside interface
767 nat44_ed_is_interface_outside (snat_interface_t *i)
769 return i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE;
772 /** \brief Check if client initiating TCP connection (received SYN from client)
774 @return true if client initiating TCP connection
777 tcp_flags_is_init (u8 f)
779 return (f & TCP_FLAG_SYN) && !(f & TCP_FLAG_ACK);
783 is_sm_addr_only (u32 f)
785 return (f & NAT_SM_FLAG_ADDR_ONLY);
789 is_sm_out2in_only (u32 f)
791 return (f & NAT_SM_FLAG_OUT2IN_ONLY);
795 is_sm_identity_nat (u32 f)
797 return (f & NAT_SM_FLAG_IDENTITY_NAT);
803 return (f & NAT_SM_FLAG_LB);
807 is_sm_exact_address (u32 f)
809 return (f & NAT_SM_FLAG_EXACT_ADDRESS);
813 is_sm_self_twice_nat (u32 f)
815 return (f & NAT_SM_FLAG_SELF_TWICE_NAT);
819 is_sm_twice_nat (u32 f)
821 return (f & NAT_SM_FLAG_TWICE_NAT);
825 is_sm_switch_address (u32 f)
827 return (f & NAT_SM_FLAG_SWITCH_ADDRESS);
830 #define nat_log_err(...) \
831 vlib_log(VLIB_LOG_LEVEL_ERR, snat_main.log_class, __VA_ARGS__)
832 #define nat_log_warn(...) \
833 vlib_log(VLIB_LOG_LEVEL_WARNING, snat_main.log_class, __VA_ARGS__)
834 #define nat_log_info(...) \
835 vlib_log(VLIB_LOG_LEVEL_INFO, snat_main.log_class, __VA_ARGS__)
836 #define nat_log_debug(...)\
837 vlib_log(VLIB_LOG_LEVEL_DEBUG, snat_main.log_class, __VA_ARGS__)
839 clib_error_t *nat44_api_hookup (vlib_main_t *vm);
841 int snat_set_workers (uword *bitmap);
843 int nat44_plugin_enable (nat44_config_t c);
844 int nat44_plugin_disable ();
846 int nat44_ed_add_interface (u32 sw_if_index, u8 is_inside);
847 int nat44_ed_del_interface (u32 sw_if_index, u8 is_inside);
848 int nat44_ed_add_output_interface (u32 sw_if_index);
849 int nat44_ed_del_output_interface (u32 sw_if_index);
851 int nat44_ed_add_address (ip4_address_t *addr, u32 vrf_id, u8 twice_nat);
852 int nat44_ed_del_address (ip4_address_t addr, u8 twice_nat);
853 int nat44_ed_add_interface_address (u32 sw_if_index, u8 twice_nat);
854 int nat44_ed_del_interface_address (u32 sw_if_index, u8 twice_nat);
856 int nat44_ed_add_del_vrf_table (u32 table_vrf_id, bool is_add);
857 int nat44_ed_add_del_vrf_route (u32 table_vrf_id, u32 vrf_id, bool is_add);
858 void nat44_ed_del_vrf_tables ();
860 int nat44_ed_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
861 u16 l_port, u16 e_port, ip_protocol_t proto,
862 u32 vrf_id, u32 sw_if_index, u32 flags,
863 ip4_address_t pool_addr, u8 *tag);
865 int nat44_ed_del_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
866 u16 l_port, u16 e_port, ip_protocol_t proto,
867 u32 vrf_id, u32 sw_if_index, u32 flags);
869 int nat44_ed_add_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
871 nat44_lb_addr_port_t *locals, u32 flags,
872 u8 *tag, u32 affinity);
874 int nat44_ed_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
875 ip_protocol_t proto, u32 flags);
877 int nat44_ed_add_del_lb_static_mapping_local (ip4_address_t e_addr, u16 e_port,
878 ip4_address_t l_addr, u16 l_port,
879 ip_protocol_t proto, u32 vrf_id,
880 u8 probability, u8 is_add);
883 * @brief Delete NAT44 endpoint-dependent session
885 * @param sm snat global configuration data
886 * @param addr IPv4 address
887 * @param port L4 port number
888 * @param proto L4 protocol
889 * @param vrf_id VRF ID
890 * @param is_in 1 = inside network address and port pair, 0 = outside
892 * @return 0 on success, non-zero value otherwise
894 int nat44_ed_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
895 ip4_address_t *eh_addr, u16 eh_port, u8 proto,
896 u32 vrf_id, int is_in);
898 void nat44_ed_free_session_data (snat_main_t *sm, snat_session_t *s,
899 u32 thread_index, u8 is_ha);
902 * @brief Set NAT44 session limit (session limit, vrf id)
904 * @param session_limit Session limit
905 * @param vrf_id VRF id
906 * @return 0 on success, non-zero value otherwise
908 int nat44_set_session_limit (u32 session_limit, u32 vrf_id);
911 * @brief Update NAT44 session limit flushing all data (session limit, vrf id)
913 * @param session_limit Session limit
914 * @param vrf_id VRF id
915 * @return 0 on success, non-zero value otherwise
917 int nat44_update_session_limit (u32 session_limit, u32 vrf_id);
919 void expire_per_vrf_sessions (u32 fib_index);
921 int snat_static_mapping_match (vlib_main_t *vm, ip4_address_t match_addr,
922 u16 match_port, u32 match_fib_index,
923 ip_protocol_t match_protocol,
924 ip4_address_t *mapping_addr, u16 *mapping_port,
925 u32 *mapping_fib_index, int by_external,
926 u8 *is_addr_only, twice_nat_type_t *twice_nat,
927 lb_nat_type_t *lb, ip4_address_t *ext_host_addr,
929 snat_static_mapping_t **out);
931 u32 get_thread_idx_by_port (u16 e_port);
933 u32 nat_calc_bihash_buckets (u32 n_elts);
935 void nat44_addresses_free (snat_address_t **addresses);
937 void nat44_ed_sessions_clear ();
939 int nat44_ed_set_frame_queue_nelts (u32 frame_queue_nelts);
941 void nat_6t_l3_l4_csum_calc (nat_6t_flow_t *f);
943 snat_static_mapping_t *nat44_ed_sm_i2o_lookup (snat_main_t *sm,
944 ip4_address_t addr, u16 port,
945 u32 fib_index, u8 proto);
947 snat_static_mapping_t *nat44_ed_sm_o2i_lookup (snat_main_t *sm,
948 ip4_address_t addr, u16 port,
949 u32 fib_index, u8 proto);
951 void nat_syslog_nat44_sadd (u32 ssubix, u32 sfibix, ip4_address_t *isaddr,
952 u16 isport, ip4_address_t *idaddr, u16 idport,
953 ip4_address_t *xsaddr, u16 xsport,
954 ip4_address_t *xdaddr, u16 xdport, u8 proto,
957 void nat_syslog_nat44_sdel (u32 ssubix, u32 sfibix, ip4_address_t *isaddr,
958 u16 isport, ip4_address_t *idaddr, u16 idport,
959 ip4_address_t *xsaddr, u16 xsport,
960 ip4_address_t *xdaddr, u16 xdport, u8 proto,
965 NAT_ED_TRNSL_ERR_SUCCESS = 0,
966 NAT_ED_TRNSL_ERR_TRANSLATION_FAILED = 1,
967 NAT_ED_TRNSL_ERR_FLOW_MISMATCH = 2,
968 NAT_ED_TRNSL_ERR_PACKET_TRUNCATED = 3,
969 NAT_ED_TRNSL_ERR_INNER_IP_CORRUPT = 4,
970 NAT_ED_TRNSL_ERR_INVALID_CSUM = 5,
971 } nat_translation_error_e;
973 nat_translation_error_e nat_6t_flow_buf_translate_i2o (
974 vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip,
975 nat_6t_flow_t *f, ip_protocol_t proto, int is_output_feature);
977 nat_translation_error_e nat_6t_flow_buf_translate_o2i (
978 vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip,
979 nat_6t_flow_t *f, ip_protocol_t proto, int is_output_feature);
981 #endif /* __included_nat44_ed_h__ */
983 * fd.io coding-style-patch-verification: ON
986 * eval: (c-set-style "gnu")