From 0eaf4e6784efb2d058fe2f031578251b6bcc0aa8 Mon Sep 17 00:00:00 2001 From: Filip Varga Date: Wed, 17 Feb 2021 14:34:54 +0100 Subject: nat: Final NAT44 EI/ED split patch This patch achieves complete separation of endpoint-dependent and endpoint-independent IPv4 NAT features. Some common stuff is also moved to NAT library. Type: refactor Change-Id: I52468b7e2b5ac28958a2baf8e2ea01787322e801 Signed-off-by: Filip Varga --- src/plugins/nat/nat.h | 1558 ------------------------------------------------- 1 file changed, 1558 deletions(-) delete mode 100644 src/plugins/nat/nat.h (limited to 'src/plugins/nat/nat.h') diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h deleted file mode 100644 index c1dc31e8710..00000000000 --- a/src/plugins/nat/nat.h +++ /dev/null @@ -1,1558 +0,0 @@ -/* - * Copyright (c) 2020 Cisco and/or its affiliates. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -/** - * @file nat.c - * NAT plugin global declarations - */ -#ifndef __included_nat_h__ -#define __included_nat_h__ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* default number of worker handoff frame queue elements */ -#define NAT_FQ_NELTS_DEFAULT 64 - -/* NAT buffer flags */ -#define SNAT_FLAG_HAIRPINNING (1 << 0) - -/* NAT44 API Configuration flags */ -#define foreach_nat44_config_flag \ - _(0x00, IS_ENDPOINT_INDEPENDENT) \ - _(0x01, IS_ENDPOINT_DEPENDENT) \ - _(0x02, IS_STATIC_MAPPING_ONLY) \ - _(0x04, IS_CONNECTION_TRACKING) \ - _(0x08, IS_OUT2IN_DPO) - -typedef enum nat44_config_flags_t_ -{ -#define _(n,f) NAT44_API_##f = n, - foreach_nat44_config_flag -#undef _ -} nat44_config_flags_t; - -typedef struct -{ - /* nat44 plugin features */ - u8 static_mapping_only; - u8 connection_tracking; - u8 endpoint_dependent; - u8 out2in_dpo; - - u32 inside_vrf; - u32 outside_vrf; - - /* maximum number of users */ - u32 users; - - /* maximum number of sessions */ - u32 sessions; - - /* maximum number of ssessions per user */ - u32 user_sessions; -} nat44_config_t; - -typedef enum -{ - NAT_NEXT_DROP, - NAT_NEXT_ICMP_ERROR, - NAT_NEXT_IN2OUT_ED_FAST_PATH, - NAT_NEXT_IN2OUT_ED_SLOW_PATH, - NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH, - NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH, - NAT_NEXT_OUT2IN_ED_FAST_PATH, - NAT_NEXT_OUT2IN_ED_SLOW_PATH, - NAT_NEXT_IN2OUT_CLASSIFY, - NAT_NEXT_OUT2IN_CLASSIFY, - NAT_N_NEXT, -} nat_next_t; - -typedef struct -{ - u32 next_index; - u32 arc_next_index; -} nat_pre_trace_t; - -/* user (internal host) key */ -typedef struct -{ - union - { - struct - { - ip4_address_t addr; - u32 fib_index; - }; - u64 as_u64; - }; -} snat_user_key_t; - -/* External address and port allocation modes */ -#define foreach_nat_addr_and_port_alloc_alg \ - _(0, DEFAULT, "default") \ - _(1, MAPE, "map-e") \ - _(2, RANGE, "port-range") - -typedef enum -{ -#define _(v, N, s) NAT_ADDR_AND_PORT_ALLOC_ALG_##N = v, - foreach_nat_addr_and_port_alloc_alg -#undef _ -} nat_addr_and_port_alloc_alg_t; - -/* Session state */ -#define foreach_snat_session_state \ - _(0, UNKNOWN, "unknown") \ - _(1, UDP_ACTIVE, "udp-active") \ - _(2, TCP_SYN_SENT, "tcp-syn-sent") \ - _(3, TCP_ESTABLISHED, "tcp-established") \ - _(4, TCP_FIN_WAIT, "tcp-fin-wait") \ - _(5, TCP_CLOSE_WAIT, "tcp-close-wait") \ - _(6, TCP_CLOSING, "tcp-closing") \ - _(7, TCP_LAST_ACK, "tcp-last-ack") \ - _(8, TCP_CLOSED, "tcp-closed") \ - _(9, ICMP_ACTIVE, "icmp-active") - -typedef enum -{ -#define _(v, N, s) SNAT_SESSION_##N = v, - foreach_snat_session_state -#undef _ -} snat_session_state_t; - -#define foreach_nat_in2out_ed_error \ -_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \ -_(OUT_OF_PORTS, "out of ports") \ -_(BAD_ICMP_TYPE, "unsupported ICMP type") \ -_(MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \ -_(NON_SYN, "non-SYN packet try to create session") \ -_(TCP_CLOSED, "drops due to TCP in transitory timeout") - -typedef enum -{ -#define _(sym,str) NAT_IN2OUT_ED_ERROR_##sym, - foreach_nat_in2out_ed_error -#undef _ - NAT_IN2OUT_ED_N_ERROR, -} nat_in2out_ed_error_t; - -#define foreach_nat_out2in_ed_error \ - _ (UNSUPPORTED_PROTOCOL, "unsupported protocol") \ - _ (OUT_OF_PORTS, "out of ports") \ - _ (BAD_ICMP_TYPE, "unsupported ICMP type") \ - _ (NO_TRANSLATION, "no translation") \ - _ (MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \ - _ (MAX_USER_SESS_EXCEEDED, "max user sessions exceeded") \ - _ (CANNOT_CREATE_USER, "cannot create NAT user") \ - _ (NON_SYN, "non-SYN packet try to create session") \ - _ (TCP_CLOSED, "drops due to TCP in transitory timeout") \ - _ (HASH_ADD_FAILED, "hash table add failed") - -typedef enum -{ -#define _(sym,str) NAT_OUT2IN_ED_ERROR_##sym, - foreach_nat_out2in_ed_error -#undef _ - NAT_OUT2IN_ED_N_ERROR, -} nat_out2in_ed_error_t; - - -/* Endpoint dependent TCP session state */ -#define NAT44_SES_I2O_FIN 1 -#define NAT44_SES_O2I_FIN 2 -#define NAT44_SES_I2O_FIN_ACK 4 -#define NAT44_SES_O2I_FIN_ACK 8 -#define NAT44_SES_I2O_SYN 16 -#define NAT44_SES_O2I_SYN 32 -#define NAT44_SES_RST 64 - -/* Session flags */ -#define SNAT_SESSION_FLAG_STATIC_MAPPING (1 << 0) -#define SNAT_SESSION_FLAG_UNKNOWN_PROTO (1 << 1) -#define SNAT_SESSION_FLAG_LOAD_BALANCING (1 << 2) -#define SNAT_SESSION_FLAG_TWICE_NAT (1 << 3) -#define SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT (1 << 4) -#define SNAT_SESSION_FLAG_FWD_BYPASS (1 << 5) -#define SNAT_SESSION_FLAG_AFFINITY (1 << 6) -#define SNAT_SESSION_FLAG_EXACT_ADDRESS (1 << 7) -#define SNAT_SESSION_FLAG_HAIRPINNING (1 << 8) - -/* NAT interface flags */ -#define NAT_INTERFACE_FLAG_IS_INSIDE 1 -#define NAT_INTERFACE_FLAG_IS_OUTSIDE 2 - -/* Static mapping flags */ -#define NAT_STATIC_MAPPING_FLAG_ADDR_ONLY 1 -#define NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY 2 -#define NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT 4 -#define NAT_STATIC_MAPPING_FLAG_LB 8 -#define NAT_STATIC_MAPPING_FLAG_EXACT_ADDRESS 16 - -/* *INDENT-OFF* */ -typedef CLIB_PACKED(struct -{ - // number of sessions in this vrf - u32 ses_count; - - u32 rx_fib_index; - u32 tx_fib_index; - - // is this vrf expired - u8 expired; -}) per_vrf_sessions_t; -/* *INDENT-ON* */ - -typedef struct -{ - ip4_address_t saddr, daddr; - u32 fib_index; - u16 sport, dport; - u16 icmp_id; - u8 proto; -} nat_6t_t; - -typedef struct -{ -#define NAT_FLOW_OP_SADDR_REWRITE (1 << 1) -#define NAT_FLOW_OP_SPORT_REWRITE (1 << 2) -#define NAT_FLOW_OP_DADDR_REWRITE (1 << 3) -#define NAT_FLOW_OP_DPORT_REWRITE (1 << 4) -#define NAT_FLOW_OP_ICMP_ID_REWRITE (1 << 5) -#define NAT_FLOW_OP_TXFIB_REWRITE (1 << 6) - int ops; - nat_6t_t match; - nat_6t_t rewrite; - uword l3_csum_delta; - uword l4_csum_delta; -} nat_6t_flow_t; - -always_inline void -nat_6t_flow_saddr_rewrite_set (nat_6t_flow_t *f, u32 saddr) -{ - f->ops |= NAT_FLOW_OP_SADDR_REWRITE; - f->rewrite.saddr.as_u32 = saddr; -} - -always_inline void -nat_6t_flow_daddr_rewrite_set (nat_6t_flow_t *f, u32 daddr) -{ - f->ops |= NAT_FLOW_OP_DADDR_REWRITE; - f->rewrite.daddr.as_u32 = daddr; -} - -always_inline void -nat_6t_flow_sport_rewrite_set (nat_6t_flow_t *f, u32 sport) -{ - f->ops |= NAT_FLOW_OP_SPORT_REWRITE; - f->rewrite.sport = sport; -} - -always_inline void -nat_6t_flow_dport_rewrite_set (nat_6t_flow_t *f, u32 dport) -{ - f->ops |= NAT_FLOW_OP_DPORT_REWRITE; - f->rewrite.dport = dport; -} - -always_inline void -nat_6t_flow_txfib_rewrite_set (nat_6t_flow_t *f, u32 tx_fib_index) -{ - f->ops |= NAT_FLOW_OP_TXFIB_REWRITE; - f->rewrite.fib_index = tx_fib_index; -} - -always_inline void -nat_6t_flow_icmp_id_rewrite_set (nat_6t_flow_t *f, u16 id) -{ - f->ops |= NAT_FLOW_OP_ICMP_ID_REWRITE; - f->rewrite.icmp_id = id; -} - -/* *INDENT-OFF* */ -typedef CLIB_PACKED(struct -{ - /* Outside network tuple */ - struct - { - ip4_address_t addr; - u32 fib_index; - u16 port; - } out2in; - - /* Inside network tuple */ - struct - { - ip4_address_t addr; - u32 fib_index; - u16 port; - } in2out; - - nat_protocol_t nat_proto; - - nat_6t_flow_t i2o; - nat_6t_flow_t o2i; - - /* Flags */ - u32 flags; - - /* Per-user translations */ - u32 per_user_index; - u32 per_user_list_head_index; - - /* head of LRU list in which this session is tracked */ - u32 lru_head_index; - /* index in global LRU list */ - u32 lru_index; - f64 last_lru_update; - - /* Last heard timer */ - f64 last_heard; - - /* Last HA refresh */ - f64 ha_last_refreshed; - - /* Counters */ - u64 total_bytes; - u32 total_pkts; - - /* External host address and port */ - ip4_address_t ext_host_addr; - u16 ext_host_port; - - /* External host address and port after translation */ - ip4_address_t ext_host_nat_addr; - u16 ext_host_nat_port; - - /* TCP session state */ - u8 state; - u32 i2o_fin_seq; - u32 o2i_fin_seq; - u64 tcp_closed_timestamp; - - /* user index */ - u32 user_index; - - /* per vrf sessions index */ - u32 per_vrf_sessions_index; - -}) snat_session_t; -/* *INDENT-ON* */ - -typedef struct -{ - ip4_address_t addr; - u32 fib_index; - u32 sessions_per_user_list_head_index; - u32 nsessions; - u32 nstaticsessions; -} snat_user_t; - -typedef struct -{ - ip4_address_t addr; - u32 fib_index; -/* *INDENT-OFF* */ -#define _(N, i, n, s) \ - u32 busy_##n##_ports; \ - u32 * busy_##n##_ports_per_thread; \ - u32 busy_##n##_port_refcounts[65535]; - foreach_nat_protocol -#undef _ -/* *INDENT-ON* */ -} snat_address_t; - -typedef struct -{ - u32 fib_index; - u32 ref_count; -} nat_fib_t; - -typedef struct -{ - u32 fib_index; - u32 refcount; -} nat_outside_fib_t; - -typedef struct -{ - /* backend IP address */ - ip4_address_t addr; - /* backend port number */ - u16 port; - /* probability of the backend to be randomly matched */ - u8 probability; - u8 prefix; - /* backend FIB table */ - u32 vrf_id; - u32 fib_index; -} nat44_lb_addr_port_t; - -typedef enum -{ - /* twice-nat disabled */ - TWICE_NAT_DISABLED, - /* twice-nat enabled */ - TWICE_NAT, - /* twice-nat only when src IP equals dst IP after translation */ - TWICE_NAT_SELF, -} twice_nat_type_t; - -typedef enum -{ - /* no load-balancing */ - NO_LB_NAT, - /* load-balancing */ - LB_NAT, - /* load-balancing with affinity */ - AFFINITY_LB_NAT, -} lb_nat_type_t; - -typedef struct -{ - /* prefered pool address */ - ip4_address_t pool_addr; - /* local IP address */ - ip4_address_t local_addr; - /* external IP address */ - ip4_address_t external_addr; - /* local port */ - u16 local_port; - /* external port */ - u16 external_port; - /* is twice-nat */ - twice_nat_type_t twice_nat; - /* local FIB table */ - u32 vrf_id; - u32 fib_index; - /* protocol */ - nat_protocol_t proto; - /* 0 = disabled, otherwise client IP affinity sticky time in seconds */ - u32 affinity; - /* worker threads used by backends/local host */ - u32 *workers; - /* opaque string tag */ - u8 *tag; - /* backends for load-balancing mode */ - nat44_lb_addr_port_t *locals; - /* affinity per service lis */ - u32 affinity_per_service_list_head_index; - /* flags */ - u32 flags; -} snat_static_mapping_t; - -typedef struct -{ - u32 sw_if_index; - u8 flags; -} snat_interface_t; - -typedef struct -{ - ip4_address_t l_addr; - ip4_address_t pool_addr; - u16 l_port; - u16 e_port; - u32 sw_if_index; - u32 vrf_id; - nat_protocol_t proto; - u32 flags; - int addr_only; - int twice_nat; - int out2in_only; - int identity_nat; - int exact; - u8 *tag; -} snat_static_map_resolve_t; - -typedef struct -{ - /* Find-a-user => src address lookup */ - clib_bihash_8_8_t user_hash; - - /* User pool */ - snat_user_t *users; - - /* Session pool */ - snat_session_t *sessions; - - /* Pool of doubly-linked list elements */ - dlist_elt_t *list_pool; - - /* LRU session list - head is stale, tail is fresh */ - dlist_elt_t *lru_pool; - u32 tcp_trans_lru_head_index; - u32 tcp_estab_lru_head_index; - u32 udp_lru_head_index; - u32 icmp_lru_head_index; - u32 unk_proto_lru_head_index; - - /* NAT thread index */ - u32 snat_thread_index; - - /* real thread index */ - u32 thread_index; - - per_vrf_sessions_t *per_vrf_sessions_vec; - -} snat_main_per_thread_data_t; - -struct snat_main_s; - -/* ICMP session match function */ -typedef 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, ip4_address_t *addr, u16 *port, - u32 *fib_index, nat_protocol_t *proto, snat_session_t **s_out, - u8 *dont_translate); - -/* Return worker thread index for given packet */ -typedef u32 (snat_get_worker_in2out_function_t) (ip4_header_t * ip, - u32 rx_fib_index, - u8 is_output); - -typedef u32 (snat_get_worker_out2in_function_t) (vlib_buffer_t * b, - ip4_header_t * ip, - u32 rx_fib_index, - u8 is_output); - -/* NAT address and port allocation function */ -typedef int (nat_alloc_out_addr_and_port_function_t) (snat_address_t * - addresses, - u32 fib_index, - u32 thread_index, - nat_protocol_t proto, - ip4_address_t * addr, - u16 * port, - u16 port_per_thread, - u32 snat_thread_index); - -#define foreach_nat_counter _ (tcp) _ (udp) _ (icmp) _ (other) _ (drops) - -typedef struct snat_main_s -{ - /* ICMP session match functions */ - snat_icmp_match_function_t *icmp_match_in2out_cb; - snat_icmp_match_function_t *icmp_match_out2in_cb; - - /* Thread settings */ - u32 num_workers; - u32 first_worker_index; - u32 *workers; - snat_get_worker_in2out_function_t *worker_in2out_cb; - snat_get_worker_out2in_function_t *worker_out2in_cb; - u16 port_per_thread; - - /* Per thread data */ - snat_main_per_thread_data_t *per_thread_data; - - /* Find a static mapping by local */ - clib_bihash_8_8_t static_mapping_by_local; - - /* Find a static mapping by external */ - clib_bihash_8_8_t static_mapping_by_external; - - /* Static mapping pool */ - snat_static_mapping_t *static_mappings; - - /* Endpoint independent lookup tables */ - clib_bihash_8_8_t in2out; - clib_bihash_8_8_t out2in; - - /* Endpoint dependent lookup table */ - clib_bihash_16_8_t flow_hash; - - /* Interface pool */ - snat_interface_t *interfaces; - snat_interface_t *output_feature_interfaces; - - /* Vector of outside addresses */ - snat_address_t *addresses; - /* Address and port allocation function */ - nat_alloc_out_addr_and_port_function_t *alloc_addr_and_port; - /* Address and port allocation type */ - nat_addr_and_port_alloc_alg_t addr_and_port_alloc_alg; - /* Port set parameters (MAP-E) */ - u8 psid_offset; - u8 psid_length; - u16 psid; - /* Port range parameters */ - u16 start_port; - u16 end_port; - - /* vector of fibs */ - nat_fib_t *fibs; - - /* vector of outside fibs */ - nat_outside_fib_t *outside_fibs; - - /* Vector of twice NAT addresses for external hosts */ - snat_address_t *twice_nat_addresses; - - /* sw_if_indices whose intfc addresses should be auto-added */ - u32 *auto_add_sw_if_indices; - u32 *auto_add_sw_if_indices_twice_nat; - - /* vector of interface address static mappings to resolve. */ - snat_static_map_resolve_t *to_resolve; - - /* Randomize port allocation order */ - u32 random_seed; - - /* Worker handoff frame-queue index */ - u32 fq_in2out_index; - u32 fq_in2out_output_index; - u32 fq_out2in_index; - - /* node indexes */ - u32 error_node_index; - - /* handoff fq nodes */ - u32 handoff_out2in_index; - u32 handoff_in2out_index; - u32 handoff_in2out_output_index; - - /* respect feature arc nodes */ - u32 pre_out2in_node_index; - u32 pre_in2out_node_index; - - u32 out2in_node_index; - u32 in2out_node_index; - u32 in2out_output_node_index; - - u32 in2out_fast_node_index; - u32 in2out_slowpath_node_index; - u32 in2out_slowpath_output_node_index; - u32 out2in_fast_node_index; - - u32 ei_out2in_node_index; - u32 ei_in2out_node_index; - u32 ei_in2out_output_node_index; - - u32 ed_out2in_node_index; - u32 ed_in2out_node_index; - u32 ed_in2out_output_node_index; - - u32 ed_in2out_slowpath_node_index; - u32 ed_out2in_slowpath_node_index; - - u32 hairpinning_node_index; - u32 hairpin_dst_node_index; - u32 hairpin_src_node_index; - - nat44_config_t rconfig; - //nat44_config_t cconfig; - - /* If forwarding is enabled */ - u8 forwarding_enabled; - - /* Config parameters */ - u8 endpoint_dependent; - - u8 out2in_dpo; - /* static mapping config */ - u8 static_mapping_only; - u8 static_mapping_connection_tracking; - - /* Is translation memory size calculated or user defined */ - u8 translation_memory_size_set; - - u32 translation_buckets; - u32 max_translations_per_thread; - u32 *max_translations_per_fib; - u32 max_users_per_thread; - u32 user_buckets; - u32 max_translations_per_user; - - u32 outside_vrf_id; - u32 outside_fib_index; - u32 inside_vrf_id; - u32 inside_fib_index; - - nat_timeouts_t timeouts; - - /* TCP MSS clamping */ - u16 mss_clamping; - - /* counters */ - vlib_simple_counter_main_t total_users; - vlib_simple_counter_main_t total_sessions; - vlib_simple_counter_main_t user_limit_reached; - -#define _(x) vlib_simple_counter_main_t x; - struct - { - struct - { - struct - { - foreach_nat_counter; - } in2out; - - struct - { - foreach_nat_counter; - } out2in; - - struct - { - foreach_nat_counter; - } in2out_ed; - - struct - { - foreach_nat_counter; - } out2in_ed; - } fastpath; - - struct - { - struct - { - foreach_nat_counter; - } in2out; - - struct - { - foreach_nat_counter; - } out2in; - - struct - { - foreach_nat_counter; - } in2out_ed; - - struct - { - foreach_nat_counter; - } out2in_ed; - } slowpath; - - vlib_simple_counter_main_t hairpinning; - } counters; -#undef _ - - /* API message ID base */ - u16 msg_id_base; - - /* log class */ - vlib_log_class_t log_class; - /* logging level */ - u8 log_level; - - /* convenience */ - api_main_t *api_main; - ip4_main_t *ip4_main; - ip_lookup_main_t *ip4_lookup_main; - - fib_source_t fib_src_hi; - fib_source_t fib_src_low; - - /* pat - dynamic mapping enabled or conneciton tracking */ - u8 pat; - - /* number of worker handoff frame queue elements */ - u32 frame_queue_nelts; - - /* nat44 plugin enabled */ - u8 enabled; - - vnet_main_t *vnet_main; - - u32 nat44_in2out_hairpinning_finish_ip4_lookup_node_fq_index; - u32 nat44_in2out_hairpinning_finish_interface_output_node_fq_index; - u32 nat44_hairpinning_fq_index; - u32 snat_hairpin_dst_fq_index; -} snat_main_t; - -typedef struct -{ - u32 thread_index; - f64 now; -} nat44_is_idle_session_ctx_t; - -typedef struct -{ - u32 cached_sw_if_index; - u32 cached_ip4_address; -} snat_runtime_t; - -extern snat_main_t snat_main; - -// nat pre ed next_node feature classification -extern vlib_node_registration_t nat_default_node; -extern vlib_node_registration_t nat_pre_in2out_node; -extern vlib_node_registration_t nat_pre_out2in_node; - -extern vlib_node_registration_t snat_in2out_node; -extern vlib_node_registration_t snat_in2out_output_node; -extern vlib_node_registration_t snat_out2in_node; -extern vlib_node_registration_t snat_in2out_worker_handoff_node; -extern vlib_node_registration_t snat_in2out_output_worker_handoff_node; -extern vlib_node_registration_t snat_out2in_worker_handoff_node; -extern vlib_node_registration_t nat44_ed_in2out_node; -extern vlib_node_registration_t nat44_ed_in2out_output_node; -extern vlib_node_registration_t nat44_ed_out2in_node; - -extern fib_source_t nat_fib_src_hi; -extern fib_source_t nat_fib_src_low; - -/* format functions */ -format_function_t format_snat_user; -format_function_t format_snat_static_mapping; -format_function_t format_snat_static_map_to_resolve; -format_function_t format_snat_session; -format_function_t format_snat_key; -format_function_t format_static_mapping_key; -format_function_t format_nat_protocol; -format_function_t format_nat_addr_and_port_alloc_alg; -/* unformat functions */ -unformat_function_t unformat_nat_protocol; - -/** \brief Check if SNAT session is created from static mapping. - @param s SNAT session - @return 1 if SNAT session is created from static mapping otherwise 0 -*/ -#define snat_is_session_static(s) (s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING) - -/** \brief Check if SNAT session for unknown protocol. - @param s SNAT session - @return 1 if SNAT session for unknown protocol otherwise 0 -*/ -#define snat_is_unk_proto_session(s) (s->flags & SNAT_SESSION_FLAG_UNKNOWN_PROTO) - -/** \brief Check if NAT session is twice NAT. - @param s NAT session - @return 1 if NAT session is twice NAT -*/ -#define is_twice_nat_session(s) (s->flags & SNAT_SESSION_FLAG_TWICE_NAT) - -/** \brief Check if NAT session is load-balancing. - @param s NAT session - @return 1 if NAT session is load-balancing -*/ -#define is_lb_session(s) (s->flags & SNAT_SESSION_FLAG_LOAD_BALANCING) - -/** \brief Check if NAT session is forwarding bypass. - @param s NAT session - @return 1 if NAT session is load-balancing -*/ -#define is_fwd_bypass_session(s) (s->flags & SNAT_SESSION_FLAG_FWD_BYPASS) - -/** \brief Check if NAT session is endpoint dependent. - @param s NAT session - @return 1 if NAT session is endpoint dependent -*/ -#define is_ed_session(s) (s->flags & SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT) - -/** \brief Check if NAT session has affinity record. - @param s NAT session - @return 1 if NAT session has affinity record -*/ -#define is_affinity_sessions(s) (s->flags & SNAT_SESSION_FLAG_AFFINITY) - -/** \brief Check if exact pool address should be used. - @param s SNAT session - @return 1 if exact pool address or 0 -*/ -#define is_exact_address_session(s) (s->flags & SNAT_SESSION_FLAG_EXACT_ADDRESS) - -/** \brief Check if NAT interface is inside. - @param i NAT interface - @return 1 if inside interface -*/ -#define nat_interface_is_inside(i) i->flags & NAT_INTERFACE_FLAG_IS_INSIDE - -/** \brief Check if NAT interface is outside. - @param i NAT interface - @return 1 if outside interface -*/ -#define nat_interface_is_outside(i) i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE - -/** \brief Check if NAT44 endpoint-dependent TCP session is closed. - @param s NAT session - @return 1 if session is closed -*/ -#define nat44_is_ses_closed(s) s->state == 0xf - -/** \brief Check if NAT static mapping is address only (1:1NAT). - @param sm NAT static mapping - @return 1 if 1:1NAT, 0 if 1:1NAPT -*/ -#define is_addr_only_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_ADDR_ONLY) - -/** \brief Check if NAT static mapping match only out2in direction. - @param sm NAT static mapping - @return 1 if rule match only out2in direction -*/ -#define is_out2in_only_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY) - -/** \brief Check if NAT static mapping is identity NAT. - @param sm NAT static mapping - @return 1 if identity NAT -*/ -#define is_identity_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT) - -/** \brief Check if NAT static mapping is load-balancing. - @param sm NAT static mapping - @return 1 if load-balancing -*/ -#define is_lb_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_LB) - -/** \brief Check if exact pool address should be used. - @param s SNAT session - @return 1 if exact pool address or 0 -*/ -#define is_exact_address(s) (s->flags & NAT_STATIC_MAPPING_FLAG_EXACT_ADDRESS) - -/** \brief Check if client initiating TCP connection (received SYN from client) - @param t TCP header - @return 1 if client initiating TCP connection -*/ -always_inline bool -tcp_flags_is_init (u8 f) -{ - return (f & TCP_FLAG_SYN) && !(f & TCP_FLAG_ACK); -} - -/* logging */ -#define nat_log_err(...) \ - vlib_log(VLIB_LOG_LEVEL_ERR, snat_main.log_class, __VA_ARGS__) -#define nat_log_warn(...) \ - vlib_log(VLIB_LOG_LEVEL_WARNING, snat_main.log_class, __VA_ARGS__) -#define nat_log_notice(...) \ - vlib_log(VLIB_LOG_LEVEL_NOTICE, snat_main.log_class, __VA_ARGS__) -#define nat_log_info(...) \ - vlib_log(VLIB_LOG_LEVEL_INFO, snat_main.log_class, __VA_ARGS__) -#define nat_log_debug(...)\ - vlib_log(VLIB_LOG_LEVEL_DEBUG, snat_main.log_class, __VA_ARGS__) - -/* NAT API Logging Levels */ -#define foreach_nat_log_level \ - _(0x00, LOG_NONE) \ - _(0x01, LOG_ERROR) \ - _(0x02, LOG_WARNING) \ - _(0x03, LOG_NOTICE) \ - _(0x04, LOG_INFO) \ - _(0x05, LOG_DEBUG) - -typedef enum nat_log_level_t_ -{ -#define _(n,f) SNAT_##f = n, - foreach_nat_log_level -#undef _ -} nat_log_level_t; - -#define nat_elog(_level, _str) \ -do \ - { \ - snat_main_t *sm = &snat_main; \ - if (PREDICT_FALSE (sm->log_level >= _level)) \ - { \ - ELOG_TYPE_DECLARE (e) = \ - { \ - .format = "nat-msg " _str, \ - .format_args = "", \ - }; \ - ELOG_DATA (&vlib_global_main.elog_main, e); \ - } \ - } while (0); - -#define nat_elog_addr(_level, _str, _addr) \ -do \ - { \ - if (PREDICT_FALSE (sm->log_level >= _level)) \ - { \ - ELOG_TYPE_DECLARE (e) = \ - { \ - .format = "nat-msg " _str " %d.%d.%d.%d", \ - .format_args = "i1i1i1i1", \ - }; \ - CLIB_PACKED(struct \ - { \ - u8 oct1; \ - u8 oct2; \ - u8 oct3; \ - u8 oct4; \ - }) *ed; \ - ed = ELOG_DATA (&vlib_global_main.elog_main, e); \ - ed->oct4 = _addr >> 24; \ - ed->oct3 = _addr >> 16; \ - ed->oct2 = _addr >> 8; \ - ed->oct1 = _addr; \ - } \ - } while (0); - -#define nat_elog_debug_handoff(_str, _tid, _fib, _src, _dst) \ -do \ - { \ - if (PREDICT_FALSE (sm->log_level >= SNAT_LOG_DEBUG)) \ - { \ - ELOG_TYPE_DECLARE (e) = \ - { \ - .format = "nat-msg " _str " ip src: %d.%d.%d.%d dst: %d.%d.%d.%d" \ - " tid from: %d to: %d fib: %d", \ - .format_args = "i1i1i1i1i1i1i1i1i4i4i4", \ - }; \ - CLIB_PACKED(struct \ - { \ - u8 src_oct1; \ - u8 src_oct2; \ - u8 src_oct3; \ - u8 src_oct4; \ - u8 dst_oct1; \ - u8 dst_oct2; \ - u8 dst_oct3; \ - u8 dst_oct4; \ - u32 ftid; \ - u32 ttid; \ - u32 fib; \ - }) *ed; \ - ed = ELOG_DATA (&vlib_global_main.elog_main, e); \ - ed->src_oct1 = _src >> 24; \ - ed->src_oct2 = _src >> 16; \ - ed->src_oct3 = _src >> 8; \ - ed->src_oct4 = _src; \ - ed->dst_oct1 = _dst >> 24; \ - ed->dst_oct2 = _dst >> 16; \ - ed->dst_oct3 = _dst >> 8; \ - ed->dst_oct4 = _dst; \ - ed->ftid = vlib_get_thread_index (); \ - ed->ttid = _tid; \ - ed->fib = _fib; \ - } \ - } while (0); - -#define nat_elog_debug_handoff_v2(_str, _prt, _fib, _src, _dst) \ -do \ - { \ - if (PREDICT_FALSE (sm->log_level >= SNAT_LOG_DEBUG)) \ - { \ - ELOG_TYPE_DECLARE (e) = \ - { \ - .format = "nat-msg " _str " ip_src:%d.%d.%d.%d ip_dst:%d.%d.%d.%d" \ - " tid:%d prt:%d fib:%d", \ - .format_args = "i1i1i1i1i1i1i1i1i4i4i4", \ - }; \ - CLIB_PACKED(struct \ - { \ - u8 src_oct1; \ - u8 src_oct2; \ - u8 src_oct3; \ - u8 src_oct4; \ - u8 dst_oct1; \ - u8 dst_oct2; \ - u8 dst_oct3; \ - u8 dst_oct4; \ - u32 tid; \ - u32 prt; \ - u32 fib; \ - }) *ed; \ - ed = ELOG_DATA (&vlib_global_main.elog_main, e); \ - ed->src_oct1 = _src >> 24; \ - ed->src_oct2 = _src >> 16; \ - ed->src_oct3 = _src >> 8; \ - ed->src_oct4 = _src; \ - ed->dst_oct1 = _dst >> 24; \ - ed->dst_oct2 = _dst >> 16; \ - ed->dst_oct3 = _dst >> 8; \ - ed->dst_oct4 = _dst; \ - ed->tid = vlib_get_thread_index (); \ - ed->prt = _prt; \ - ed->fib = _fib; \ - } \ - } while (0); - -#define nat_elog_X1(_level, _fmt, _arg, _val1) \ -do \ - { \ - snat_main_t *sm = &snat_main; \ - if (PREDICT_FALSE (sm->log_level >= _level)) \ - { \ - ELOG_TYPE_DECLARE (e) = \ - { \ - .format = "nat-msg " _fmt, \ - .format_args = _arg, \ - }; \ - CLIB_PACKED(struct \ - { \ - typeof (_val1) val1; \ - }) *ed; \ - ed = ELOG_DATA (&vlib_global_main.elog_main, e); \ - ed->val1 = _val1; \ - } \ - } while (0); - -#define nat_elog_notice(nat_elog_str) \ - nat_elog(SNAT_LOG_INFO, "[notice] " nat_elog_str) -#define nat_elog_warn(nat_elog_str) \ - nat_elog(SNAT_LOG_WARNING, "[warning] " nat_elog_str) -#define nat_elog_err(nat_elog_str) \ - nat_elog(SNAT_LOG_ERROR, "[error] " nat_elog_str) -#define nat_elog_debug(nat_elog_str) \ - nat_elog(SNAT_LOG_DEBUG, "[debug] " nat_elog_str) -#define nat_elog_info(nat_elog_str) \ - nat_elog(SNAT_LOG_INFO, "[info] " nat_elog_str) - -#define nat_elog_notice_X1(nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) \ - nat_elog_X1(SNAT_LOG_NOTICE, "[notice] " nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) -#define nat_elog_warn_X1(nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) \ - nat_elog_X1(SNAT_LOG_WARNING, "[warning] " nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) -#define nat_elog_err_X1(nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) \ - nat_elog_X1(SNAT_LOG_ERROR, "[error] " nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) -#define nat_elog_debug_X1(nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) \ - nat_elog_X1(SNAT_LOG_DEBUG, "[debug] " nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) -#define nat_elog_info_X1(nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) \ - nat_elog_X1(SNAT_LOG_INFO, "[info] " nat_elog_fmt_str, nat_elog_fmt_arg, nat_elog_val1) - -/* ICMP session match functions */ -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, ip4_address_t *addr, u16 *port, - u32 *fib_index, nat_protocol_t *proto, - snat_session_t **s0, u8 *dont_translate); -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, ip4_address_t *addr, u16 *port, - u32 *fib_index, nat_protocol_t *proto, - snat_session_t **s0, u8 *dont_translate); -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, ip4_address_t *addr, u16 *port, - u32 *fib_index, nat_protocol_t *proto, - snat_session_t **s0, u8 *dont_translate); -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, ip4_address_t *addr, u16 *port, - u32 *fib_index, nat_protocol_t *proto, - snat_session_t **s0, u8 *dont_translate); - -/* hairpinning functions */ -u32 snat_icmp_hairpinning (snat_main_t *sm, vlib_buffer_t *b0, - u32 thread_index, ip4_header_t *ip0, - icmp46_header_t *icmp0, u32 *required_thread_index); - -void nat_hairpinning_sm_unknown_proto (snat_main_t * sm, vlib_buffer_t * b, - ip4_header_t * ip); - -int snat_hairpinning (vlib_main_t *vm, vlib_node_runtime_t *node, - snat_main_t *sm, u32 thread_index, vlib_buffer_t *b0, - ip4_header_t *ip0, udp_header_t *udp0, - tcp_header_t *tcp0, u32 proto0, int do_trace, - u32 *required_thread_index); - -/* Call back functions for clib_bihash_add_or_overwrite_stale */ -int nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg); -int nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg); - - -/** - * @brief Enable NAT44 plugin - * - * @param c nat44_config_t - * - * @return 0 on success, non-zero value otherwise - */ -int nat44_plugin_enable (nat44_config_t c); - -/** - * @brief Disable NAT44 plugin - * - * @return 0 on success, non-zero value otherwise - */ -int nat44_plugin_disable (); - -/** - * @brief Add external address to NAT44 pool - * - * @param sm snat global configuration data - * @param addr IPv4 address - * @param vrf_id VRF id of tenant, ~0 means independent of VRF - * @param twice_nat 1 if twice NAT address - * - * @return 0 on success, non-zero value otherwise - */ -int snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id, - u8 twice_nat); - -/** - * @brief Delete external address from NAT44 pool - * - * @param sm snat global configuration data - * @param addr IPv4 address - * @param delete_sm 1 if delete static mapping using address - * @param twice_nat 1 if twice NAT address - * - * @return 0 on success, non-zero value otherwise - */ -int snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm, - u8 twice_nat); - -/** - * @brief Add/delete external address to FIB DPO (out2in DPO mode) - * - * @param addr IPv4 address - * @param is_add 1 = add, 0 = delete - * - * @return 0 on success, non-zero value otherwise - */ -void nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add); - -/** - * @brief Add/delete NAT44 static mapping - * - * @param l_addr local IPv4 address - * @param e_addr external IPv4 address - * @param l_port local port number - * @param e_port external port number - * @param vrf_id local VRF ID - * @param addr_only 1 = 1:1NAT, 0 = 1:1NAPT - * @param sw_if_index use interface address as external IPv4 address - * @param proto L4 protocol - * @param is_add 1 = add, 0 = delete - * @param twice_nat twice-nat mode - * @param out2in_only if 1 rule match only out2in direction - * @param tag opaque string tag - * @param identity_nat identity NAT - * @param pool_addr pool IPv4 address - * @param exact 1 = exact pool address - * - * @return 0 on success, non-zero value otherwise - */ -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, - nat_protocol_t proto, int is_add, - twice_nat_type_t twice_nat, u8 out2in_only, - u8 * tag, u8 identity_nat, - ip4_address_t pool_addr, int exact); - -/** - * @brief Add/delete static mapping with load-balancing (multiple backends) - * - * @param e_addr external IPv4 address - * @param e_port external port number - * @param proto L4 protocol - * @param locals list of local backends - * @param is_add 1 = add, 0 = delete - * @param twice_nat twice-nat mode - * @param out2in_only if 1 rule match only out2in direction - * @param tag opaque string tag - * @param affinity 0 = disabled, otherwise client IP affinity sticky time - * - * @return 0 on success, non-zero value otherwise - */ -int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port, - nat_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); - -int nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, - ip4_address_t l_addr, u16 l_port, - nat_protocol_t proto, u32 vrf_id, - u8 probability, u8 is_add); - -clib_error_t *nat44_api_hookup (vlib_main_t * vm); - -/** - * @brief Set NAT plugin workers - * - * @param bitmap NAT workers bitmap - * - * @return 0 on success, non-zero value otherwise - */ -int snat_set_workers (uword * bitmap); - -/** - * @brief Set NAT plugin number of frame queue elements - * - * @param frame_queue_nelts number of worker handoff frame queue elements - * - * @return 0 on success, non-zero value otherwise - */ -int snat_set_frame_queue_nelts (u32 frame_queue_nelts); - -/** - * @brief Enable/disable NAT44 feature on the interface - * - * @param sw_if_index software index of the interface - * @param is_inside 1 = inside, 0 = outside - * @param is_del 1 = delete, 0 = add - * - * @return 0 on success, non-zero value otherwise - */ -int snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del); - -/** - * @brief Enable/disable NAT44 output feature on the interface (postrouting NAT) - * - * @param sw_if_index software index of the interface - * @param is_inside 1 = inside, 0 = outside - * @param is_del 1 = delete, 0 = add - * - * @return 0 on success, non-zero value otherwise - */ -int snat_interface_add_del_output_feature (u32 sw_if_index, u8 is_inside, - int is_del); - -/** - * @brief Add/delete NAT44 pool address from specific interface - * - * @param sw_if_index software index of the interface - * @param is_del 1 = delete, 0 = add - * @param twice_nat 1 = twice NAT address for external hosts - * - * @return 0 on success, non-zero value otherwise - */ -int snat_add_interface_address (snat_main_t * sm, u32 sw_if_index, int is_del, - u8 twice_nat); - -/** - * @brief Delete NAT44 endpoint-dependent session - * - * @param sm snat global configuration data - * @param addr IPv4 address - * @param port L4 port number - * @param proto L4 protocol - * @param vrf_id VRF ID - * @param is_in 1 = inside network address and port pair, 0 = outside - * - * @return 0 on success, non-zero value otherwise - */ -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); - -/** - * @brief Free NAT44 session data (lookup keys, external address port) - * - * @param sm snat global configuration data - * @param s NAT session - * @param thread_index thread index - * @param is_ha is HA event - */ -void nat_free_session_data (snat_main_t * sm, snat_session_t * s, - u32 thread_index, u8 is_ha); - -/** - * @brief Set NAT44 session limit (session limit, vrf id) - * - * @param session_limit Session limit - * @param vrf_id VRF id - * @return 0 on success, non-zero value otherwise - */ -int nat44_set_session_limit (u32 session_limit, u32 vrf_id); - -/** - * @brief Update NAT44 session limit flushing all data (session limit, vrf id) - * - * @param session_limit Session limit - * @param vrf_id VRF id - * @return 0 on success, non-zero value otherwise - */ -int nat44_update_session_limit (u32 session_limit, u32 vrf_id); - -/** - * @brief Free all NAT44 sessions - */ -void nat44_sessions_clear (); - -/** - * @brief Find or create NAT user - * - * @param sm snat global configuration data - * @param addr IPv4 address - * @param fib_index FIB table index - * @param thread_index thread index - * - * @return NAT user data structure on success otherwise zero value - */ -snat_user_t *nat_user_get_or_create (snat_main_t * sm, - ip4_address_t * addr, u32 fib_index, - u32 thread_index); - -/** - * @brief Allocate new NAT session or recycle last used - * - * @param sm snat global configuration data - * @param u NAT user - * @param thread_index thread index - * @param now time now - * - * @return session data structure on success otherwise zero value - */ -snat_session_t *nat_session_alloc_or_recycle (snat_main_t * sm, - snat_user_t * u, - u32 thread_index, f64 now); - -/** - * @brief Free outside address and port pair - * - * @param addresses vector of outside addresses - * @param thread_index thread index - * @param key address, port and protocol - */ -void -snat_free_outside_address_and_port (snat_address_t * addresses, - u32 thread_index, - ip4_address_t * addr, - u16 port, nat_protocol_t protocol); - -void expire_per_vrf_sessions (u32 fib_index); - -/** - * @brief Match NAT44 static mapping. - * - * @param key address and port to match - * @param addr external/local address of the matched mapping - * @param port port of the matched mapping - * @param fib_index fib index of the matched mapping - * @param by_external if 0 match by local address otherwise match by external - * address - * @param is_addr_only 1 if matched mapping is address only - * @param twice_nat matched mapping is twice NAT type - * @param lb 1 if matched mapping is load-balanced - * @param ext_host_addr external host address - * @param is_identity_nat 1 if indentity mapping - * @param out if !=0 set to pointer of the mapping structure - * - * @returns 0 if match found otherwise 1. - */ -int snat_static_mapping_match (snat_main_t * sm, - ip4_address_t match_addr, - u16 match_port, - u32 match_fib_index, - nat_protocol_t match_protocol, - ip4_address_t * mapping_addr, - u16 * mapping_port, - u32 * mapping_fib_index, - 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, - snat_static_mapping_t ** out); - -/** - * @brief Add/del NAT address to FIB. - * - * Add the external NAT address to the FIB as receive entries. This ensures - * that VPP will reply to ARP for this address and we don't need to enable - * proxy ARP on the outside interface. - * - * @param addr IPv4 address - * @param plen address prefix length - * @param sw_if_index software index of the outside interface - * @param is_add 0 = delete, 1 = add. - */ -void snat_add_del_addr_to_fib (ip4_address_t * addr, - u8 p_len, u32 sw_if_index, int is_add); - -#if 0 -void -nat_ha_sadd_ed_cb (ip4_address_t * in_addr, u16 in_port, - ip4_address_t * out_addr, u16 out_port, - ip4_address_t * eh_addr, u16 eh_port, - ip4_address_t * ehn_addr, u16 ehn_port, u8 proto, - u32 fib_index, u16 flags, u32 thread_index); - -void -nat_ha_sdel_ed_cb (ip4_address_t * out_addr, u16 out_port, - ip4_address_t * eh_addr, u16 eh_port, u8 proto, - u32 fib_index, u32 ti); - -void -nat_ha_sref_ed_cb (ip4_address_t * out_addr, u16 out_port, - ip4_address_t * eh_addr, u16 eh_port, u8 proto, - u32 fib_index, u32 total_pkts, u64 total_bytes, - u32 thread_index); -#endif - -int nat_set_outside_address_and_port (snat_address_t *addresses, - u32 thread_index, ip4_address_t addr, - u16 port, nat_protocol_t protocol); - -/* - * Why is this here? Because we don't need to touch this layer to - * simply reply to an icmp. We need to change id to a unique - * value to NAT an echo request/reply. - */ - -typedef struct -{ - u16 identifier; - u16 sequence; -} icmp_echo_header_t; - -typedef struct -{ - u16 src_port, dst_port; -} tcp_udp_header_t; - -u8 *format_user_kvp (u8 * s, va_list * args); - -u32 get_thread_idx_by_port (u16 e_port); - -u8 *format_static_mapping_kvp (u8 *s, va_list *args); - -u8 *format_session_kvp (u8 *s, va_list *args); - -u8 *format_user_kvp (u8 *s, va_list *args); - -u32 nat_calc_bihash_buckets (u32 n_elts); - -void nat44_addresses_free (snat_address_t **addresses); - -typedef enum -{ - NAT_ED_TRNSL_ERR_SUCCESS = 0, - NAT_ED_TRNSL_ERR_TRANSLATION_FAILED = 1, - NAT_ED_TRNSL_ERR_FLOW_MISMATCH = 2, -} nat_translation_error_e; - -nat_translation_error_e -nat_6t_flow_buf_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, - nat_6t_flow_t *f, nat_protocol_t proto, - int is_output_feature); - -void nat_6t_l3_l4_csum_calc (nat_6t_flow_t *f); - -format_function_t format_nat_ed_translation_error; -format_function_t format_nat_6t_flow; -format_function_t format_ed_session_kvp; - -#endif /* __included_nat_h__ */ -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ -- cgit 1.2.3-korg