ipsec: trunc_size -> icv_size - vpp - Vector Packet Processing

diff options

author	Damjan Marion <damarion@cisco.com>	2019-04-04 12:25:44 +0200
committer	Neale Ranns <nranns@cisco.com>	2019-04-04 12:49:39 +0000
commit	7c22ff72aa54d15484fdc70e0c1b8a9ec5e880e0 (patch)
tree	6fb0b991a946a69793e5585ab69ccc5b3b4322e4 /src/vnet/ipsec/esp.h
parent	085637f5d5d25023c4e7b13c9dcacfcf512aceee (diff)

ipsec: trunc_size -> icv_size

Change-Id: Idb661261c2191adda963a7815822fd7a27a9e7a0 Signed-off-by: Damjan Marion <damarion@cisco.com>

Diffstat (limited to 'src/vnet/ipsec/esp.h')

-rw-r--r--

src/vnet/ipsec/esp.h

1 files changed, 2 insertions, 2 deletions

/* * Copyright (c) 2016 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 plugin global declarations */ #ifndef __included_nat_h__ #define __included_nat_h__ #include <vnet/vnet.h> #include <vnet/ip/ip.h> #include <vnet/ethernet/ethernet.h> #include <vnet/ip/icmp46_packet.h> #include <vnet/api_errno.h> #include <vppinfra/bihash_8_8.h> #include <vppinfra/bihash_16_8.h> #include <vppinfra/dlist.h> #include <vppinfra/error.h> #include <vlibapi/api.h> #include <vlib/log.h> /* default session timeouts */ #define SNAT_UDP_TIMEOUT 300 #define SNAT_TCP_TRANSITORY_TIMEOUT 240 #define SNAT_TCP_ESTABLISHED_TIMEOUT 7440 #define SNAT_ICMP_TIMEOUT 60 /* number of worker handoff frame queue elements */ #define NAT_FQ_NELTS 64 /* NAT buffer flags */ #define SNAT_FLAG_HAIRPINNING (1 << 0) /* session key (4-tuple) */ typedef struct { union { struct { ip4_address_t addr; u16 port; u16 protocol:3, fib_index:13; }; u64 as_u64; }; } snat_session_key_t; /* endpoint-dependent session key (6-tuple) */ typedef struct { union { struct { ip4_address_t l_addr; ip4_address_t r_addr; u32 proto:8, fib_index:24; u16 l_port; u16 r_port; }; u64 as_u64[2]; }; } nat_ed_ses_key_t; /* deterministic session outside key */ typedef struct { union { struct { ip4_address_t ext_host_addr; u16 ext_host_port; u16 out_port; }; u64 as_u64; }; } snat_det_out_key_t; /* user (internal host) key */ typedef struct { union { struct { ip4_address_t addr; u32 fib_index; }; u64 as_u64; }; } snat_user_key_t; typedef struct { u32 sw_if_index; u32 next_index; u8 cached; } nat44_reass_trace_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; /* Supported L4 protocols */ #define foreach_snat_protocol \ _(UDP, 0, udp, "udp") \ _(TCP, 1, tcp, "tcp") \ _(ICMP, 2, icmp, "icmp") typedef enum { #define _(N, i, n, s) SNAT_PROTOCOL_##N = i, foreach_snat_protocol #undef _ } snat_protocol_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; /* 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 #define SNAT_SESSION_FLAG_UNKNOWN_PROTO 2 #define SNAT_SESSION_FLAG_LOAD_BALANCING 4 #define SNAT_SESSION_FLAG_TWICE_NAT 8 #define SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT 16 #define SNAT_SESSION_FLAG_FWD_BYPASS 32 #define SNAT_SESSION_FLAG_AFFINITY 64 #define SNAT_SESSION_FLAG_OUTPUT_FEATURE 128 /* 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 /* *INDENT-OFF* */ typedef CLIB_PACKED(struct { /* Outside network key */ snat_session_key_t out2in; /* Inside network key */ snat_session_key_t in2out; /* Flags */ u32 flags; /* Per-user translations */ u32 per_user_index; u32 per_user_list_head_index; /* 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; /* user index */ u32 user_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) \ u16 busy_##n##_ports; \ u16 * busy_##n##_ports_per_thread; \ uword * busy_##n##_port_bitmap; foreach_snat_protocol #undef _ /* *INDENT-ON* */ } snat_address_t; typedef struct { u32 fib_index; u32 refcount; } nat_outside_fib_t; typedef struct { /* Inside network port */ u16 in_port; /* Outside network address and port */ snat_det_out_key_t out; /* Session state */ u8 state; /* Expire timeout */ u32 expire; } snat_det_session_t; typedef struct { /* inside IP address range */ ip4_address_t in_addr; u8 in_plen; /* outside IP address range */ ip4_address_t out_addr; u8 out_plen; /* inside IP addresses / outside IP addresses */ u32 sharing_ratio; /* number of ports available to internal host */ u16 ports_per_host; /* session counter */ u32 ses_num; /* vector of sessions */ snat_det_session_t *sessions; } snat_det_map_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 { /* 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 */ snat_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; u16 l_port; u16 e_port; u32 sw_if_index; u32 vrf_id; snat_protocol_t proto; u32 flags; int addr_only; int twice_nat; int is_add; int out2in_only; int identity_nat; u8 *tag; } snat_static_map_resolve_t; typedef struct { /* Main lookup tables */ clib_bihash_8_8_t out2in; clib_bihash_8_8_t in2out; /* Endpoint dependent sessions lookup tables */ clib_bihash_16_8_t out2in_ed; clib_bihash_16_8_t in2out_ed; /* 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; /* NAT thread index */ u32 snat_thread_index; } 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, u8 * p_proto, snat_session_key_t * p_value, u8 * p_dont_translate, void *d, void *e); /* Return worker thread index for given packet */ typedef u32 (snat_get_worker_function_t) (ip4_header_t * ip, u32 rx_fib_index); /* NAT address and port allacotaion function */ typedef 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); 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_function_t *worker_in2out_cb; snat_get_worker_function_t *worker_out2in_cb; u16 port_per_thread; u32 num_snat_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; /* 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 outside fibs */ nat_outside_fib_t *outside_fibs; /* Vector of twice NAT addresses for extenal 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; 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 in2out_reass_node_index; u32 ed_in2out_node_index; u32 ed_in2out_slowpath_node_index; u32 ed_in2out_reass_node_index; u32 out2in_node_index; u32 out2in_fast_node_index; u32 out2in_reass_node_index; u32 ed_out2in_node_index; u32 ed_out2in_slowpath_node_index; u32 ed_out2in_reass_node_index; u32 det_in2out_node_index; u32 det_out2in_node_index; u32 hairpinning_node_index; u32 hairpin_dst_node_index; u32 hairpin_src_node_index; u32 ed_hairpinning_node_index; u32 ed_hairpin_dst_node_index; u32 ed_hairpin_src_node_index; /* Deterministic NAT mappings */ snat_det_map_t *det_maps; /* If forwarding is enabled */ u8 forwarding_enabled; /* Config parameters */ u8 static_mapping_only; u8 static_mapping_connection_tracking; u8 deterministic; u8 out2in_dpo; u8 endpoint_dependent; u32 translation_buckets; u32 translation_memory_size; u32 max_translations; u32 user_buckets; u32 user_memory_size; u32 max_translations_per_user; u32 outside_vrf_id; u32 outside_fib_index; u32 inside_vrf_id; u32 inside_fib_index; /* values of various timeouts */ u32 udp_timeout; u32 tcp_established_timeout; u32 tcp_transitory_timeout; u32 icmp_timeout; /* TCP MSS clamping */ u16 mss_clamping; u16 mss_value_net; /* counters/gauges */ vlib_simple_counter_main_t total_users; vlib_simple_counter_main_t total_sessions; /* API message ID base */ u16 msg_id_base; /* log class */ vlib_log_class_t log_class; /* convenience */ vlib_main_t *vlib_main; vnet_main_t *vnet_main; ip4_main_t *ip4_main; ip_lookup_main_t *ip4_lookup_main; api_main_t *api_main; } 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; 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_fast_node; extern vlib_node_registration_t snat_out2in_fast_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 snat_det_in2out_node; extern vlib_node_registration_t snat_det_out2in_node; extern vlib_node_registration_t snat_hairpin_dst_node; extern vlib_node_registration_t snat_hairpin_src_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 vlib_node_registration_t nat44_ed_hairpin_dst_node; extern vlib_node_registration_t nat44_ed_hairpin_src_node; extern vlib_node_registration_t nat44_ed_in2out_worker_handoff_node; extern vlib_node_registration_t nat44_ed_in2out_output_worker_handoff_node; extern vlib_node_registration_t nat44_ed_out2in_worker_handoff_node; /* 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_det_map_ses; format_function_t format_snat_key; format_function_t format_static_mapping_key; format_function_t format_snat_protocol; format_function_t format_nat_addr_and_port_alloc_alg; format_function_t format_nat44_reass_trace; /* unformat functions */ unformat_function_t unformat_snat_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 NAT interface is inside. @param i NAT interfce @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 interfce @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 client initiating TCP connection (received SYN from client) @param t TCP header @return 1 if client initiating TCP connection */ #define tcp_is_init(t) ((t->flags & TCP_FLAG_SYN) && !(t->flags & 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__) /* 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, u8 * p_proto, snat_session_key_t * p_value, u8 * p_dont_translate, void *d, void *e); 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); 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); 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); /* ICMP deterministic NAT session match functions */ 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); 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); /* ICMP endpoint-dependent session match functions */ 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); 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); 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); 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); /* hairpinning functions */ u32 snat_icmp_hairpinning (snat_main_t * sm, vlib_buffer_t * b0, ip4_header_t * ip0, icmp46_header_t * icmp0, int is_ed); void nat_hairpinning_sm_unknown_proto (snat_main_t * sm, vlib_buffer_t * b, ip4_header_t * ip); void nat44_ed_hairpinning_unknown_proto (snat_main_t * sm, vlib_buffer_t * b, ip4_header_t * ip); 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); 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); /* Call back functions for clib_bihash_add_or_overwrite_stale */ int nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg); int nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg); 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 Increment IPv4 address */ void increment_v4_address (ip4_address_t * a); /** * @brief Add external address to NAT44 pool * * @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 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 * * @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, snat_protocol_t proto, int is_add, twice_nat_type_t twice_nat, u8 out2in_only, u8 * tag, u8 identity_nat); /** * @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, 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); 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); clib_error_t *snat_api_init (vlib_main_t * vm, snat_main_t * sm); /** * @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 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 interfce * * @param sw_if_index software index of the interface * @param is_del 1 = delete, 0 = add * @param twice_nat 1 = twice NAT address for extenal 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 session * * @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_session (snat_main_t * sm, ip4_address_t * addr, u16 port, snat_protocol_t proto, u32 vrf_id, int is_in); /** * @brief Delete NAT44 endpoint-dependent session * * @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 addrres port) * * @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 Find or create NAT user * * @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 u NAT user * @param thread_index thread index * * @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 Allocate NAT endpoint-dependent session * * @param u NAT user * @param thread_index thread index * * @return session data structure on success otherwise zero value */ snat_session_t *nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index, f64 now); /** * @brief Set address and port assignment algorithm for MAP-E CE * * @param psid Port Set Identifier value * @param psid_offset number of offset bits * @param psid_length length of PSID */ void nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length); /** * @brief Set address and port assignment algorithm for port range * * @param start_port beginning of the port range * @param end_port end of the port range */ void nat_set_alloc_addr_and_port_range (u16 start_port, u16 end_port); /** * @brief Set address and port assignment algorithm to default/standard */ void nat_set_alloc_addr_and_port_default (void); /** * @brief Free outside address and port pair * * @param addresses vector of outside addresses * @param thread_index thread index * @param k address, port and protocol */ void snat_free_outside_address_and_port (snat_address_t * addresses, u32 thread_index, snat_session_key_t * k); /** * @brief Alloc outside address and port * * @param addresses vector of outside addresses * @param fib_index FIB table index * @param thread_index thread index * @param k allocated address and port pair * @param port_per_thread number of ports per threead * @param snat_thread_index NAT thread index * * @return 0 on success, non-zero value otherwise */ 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); /** * @brief Match NAT44 static mapping. * * @param match address and port to match * @param mapping external/local address and port 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 * * @returns 0 if match found otherwise 1. */ 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); /** * @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); /* * 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; #endif /* __included_nat_h__ */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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