X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fnat.h;h=76f57542d1607b53cb6eb936ea6244b715c08e3f;hp=9c50a0b77ec65a8202a33b95652687be3ee48e11;hb=878c646a;hpb=5ba86f72439a627f2084bcafb221ad77f4990168 diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h index 9c50a0b77ec..76f57542d16 100644 --- a/src/plugins/nat/nat.h +++ b/src/plugins/nat/nat.h @@ -28,15 +28,16 @@ #include #include #include +#include #define SNAT_UDP_TIMEOUT 300 -#define SNAT_UDP_TIMEOUT_MIN 120 #define SNAT_TCP_TRANSITORY_TIMEOUT 240 #define SNAT_TCP_ESTABLISHED_TIMEOUT 7440 -#define SNAT_TCP_INCOMING_SYN 6 #define SNAT_ICMP_TIMEOUT 60 +#define NAT_FQ_NELTS 64 + #define SNAT_FLAG_HAIRPINNING (1 << 0) /* Key */ @@ -61,10 +62,10 @@ typedef struct { { ip4_address_t l_addr; ip4_address_t r_addr; - u32 fib_index; + u32 proto:8, + fib_index:24; u16 l_port; - u8 proto; - u8 rsvd; + u16 r_port; }; u64 as_u64[2]; }; @@ -115,8 +116,10 @@ typedef enum { _(3, TCP_ESTABLISHED, "tcp-established") \ _(4, TCP_FIN_WAIT, "tcp-fin-wait") \ _(5, TCP_CLOSE_WAIT, "tcp-close-wait") \ - _(6, TCP_LAST_ACK, "tcp-last-ack") \ - _(7, ICMP_ACTIVE, "icmp-active") + _(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, @@ -124,10 +127,21 @@ typedef enum { #undef _ } snat_session_state_t; +#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_is_ses_closed(s) s->state == 0xf -#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_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 NAT_INTERFACE_FLAG_IS_INSIDE 1 #define NAT_INTERFACE_FLAG_IS_OUTSIDE 2 @@ -154,9 +168,18 @@ typedef CLIB_PACKED(struct { /* Outside address */ u32 outside_address_index; /* 64-67 */ - /* External host address */ + /* External host address and port */ ip4_address_t ext_host_addr; /* 68-71 */ + u16 ext_host_port; /* 72-73 */ + /* External host address and port after translation */ + ip4_address_t ext_host_nat_addr; /* 74-77 */ + u16 ext_host_nat_port; /* 78-79 */ + + /* TCP session state */ + u8 state; + u32 i2o_fin_seq; + u32 o2i_fin_seq; }) snat_session_t; @@ -179,6 +202,11 @@ typedef struct { #undef _ } snat_address_t; +typedef struct { + u32 fib_index; + u32 refcount; +} nat_outside_fib_t; + typedef struct { u16 in_port; snat_det_out_key_t out; @@ -203,18 +231,29 @@ typedef struct { u16 port; u8 probability; u8 prefix; + u32 vrf_id; + u32 fib_index; } nat44_lb_addr_port_t; +typedef enum { + TWICE_NAT_DISABLED, + TWICE_NAT, + TWICE_NAT_SELF, +} twice_nat_type_t; + typedef struct { ip4_address_t local_addr; ip4_address_t external_addr; u16 local_port; u16 external_port; u8 addr_only; + twice_nat_type_t twice_nat; + u8 out2in_only; u32 vrf_id; u32 fib_index; snat_protocol_t proto; - u32 worker_index; + u32 *workers; + u8 *tag; nat44_lb_addr_port_t *locals; } snat_static_mapping_t; @@ -231,7 +270,9 @@ typedef struct { u32 vrf_id; snat_protocol_t proto; int addr_only; + int twice_nat; int is_add; + u8 *tag; } snat_static_map_resolve_t; typedef struct { @@ -239,6 +280,10 @@ typedef struct { 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; @@ -269,17 +314,20 @@ typedef u32 snat_icmp_match_function_t (struct snat_main_s *sm, typedef u32 (snat_get_worker_function_t) (ip4_header_t * ip, u32 rx_fib_index); -typedef struct snat_main_s { - /* Endpoint address dependent sessions lookup tables */ - clib_bihash_16_8_t out2in_ed; - clib_bihash_16_8_t in2out_ed; +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, + u32 * address_indexp, + u16 port_per_thread, + u32 snat_thread_index); +typedef struct snat_main_s { snat_icmp_match_function_t * icmp_match_in2out_cb; snat_icmp_match_function_t * icmp_match_out2in_cb; u32 num_workers; u32 first_worker_index; - u32 next_worker; u32 * workers; snat_get_worker_function_t * worker_in2out_cb; snat_get_worker_function_t * worker_out2in_cb; @@ -304,9 +352,20 @@ typedef struct snat_main_s { /* Vector of outside addresses */ snat_address_t * addresses; + nat_alloc_out_addr_and_port_function_t *alloc_addr_and_port; + u8 psid_offset; + u8 psid_length; + u16 psid; + + /* 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; @@ -323,14 +382,20 @@ typedef struct snat_main_s { u32 in2out_node_index; u32 in2out_output_node_index; u32 out2in_node_index; + u32 error_node_index; /* Deterministic NAT */ 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; @@ -342,9 +407,6 @@ typedef struct snat_main_s { u32 inside_vrf_id; u32 inside_fib_index; - /* tenant VRF aware address pool activation flag */ - u8 vrf_mode; - /* values of various timeouts */ u32 udp_timeout; u32 tcp_established_timeout; @@ -354,6 +416,9 @@ typedef struct snat_main_s { /* 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; @@ -362,6 +427,11 @@ typedef struct snat_main_s { api_main_t * api_main; } snat_main_t; +typedef struct { + u32 thread_index; + f64 now; +} nat44_is_idle_session_ctx_t; + extern snat_main_t snat_main; extern vlib_node_registration_t snat_in2out_node; extern vlib_node_registration_t snat_in2out_output_node; @@ -375,23 +445,34 @@ 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; - -void snat_free_outside_address_and_port (snat_main_t * sm, +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; + +void snat_free_outside_address_and_port (snat_address_t * addresses, u32 thread_index, - snat_session_key_t * k, - u32 address_index); + snat_session_key_t * k); -int snat_alloc_outside_address_and_port (snat_main_t * sm, +int snat_alloc_outside_address_and_port (snat_address_t * addresses, u32 fib_index, u32 thread_index, snat_session_key_t * k, - u32 * address_indexp); + u32 * address_indexp, + u16 port_per_thread, + u32 snat_thread_index); 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); + u8 *is_addr_only, + twice_nat_type_t *twice_nat, + u8 *lb); void snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, @@ -399,6 +480,10 @@ void snat_add_del_addr_to_fib (ip4_address_t * addr, int is_add); 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; typedef struct { u32 cached_sw_if_index; @@ -409,17 +494,52 @@ typedef struct { @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 +#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 +#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) #define nat_interface_is_inside(i) i->flags & NAT_INTERFACE_FLAG_IS_INSIDE #define nat_interface_is_outside(i) i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE +#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__) + /* * 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 @@ -431,31 +551,6 @@ typedef struct { u16 sequence; } icmp_echo_header_t; -always_inline u32 -ip_proto_to_snat_proto (u8 ip_proto) -{ - u32 snat_proto = ~0; - - snat_proto = (ip_proto == IP_PROTOCOL_UDP) ? SNAT_PROTOCOL_UDP : snat_proto; - snat_proto = (ip_proto == IP_PROTOCOL_TCP) ? SNAT_PROTOCOL_TCP : snat_proto; - snat_proto = (ip_proto == IP_PROTOCOL_ICMP) ? SNAT_PROTOCOL_ICMP : snat_proto; - snat_proto = (ip_proto == IP_PROTOCOL_ICMP6) ? SNAT_PROTOCOL_ICMP : snat_proto; - - return snat_proto; -} - -always_inline u8 -snat_proto_to_ip_proto (snat_protocol_t snat_proto) -{ - u8 ip_proto = ~0; - - ip_proto = (snat_proto == SNAT_PROTOCOL_UDP) ? IP_PROTOCOL_UDP : ip_proto; - ip_proto = (snat_proto == SNAT_PROTOCOL_TCP) ? IP_PROTOCOL_TCP : ip_proto; - ip_proto = (snat_proto == SNAT_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP : ip_proto; - - return ip_proto; -} - typedef struct { u16 src_port, dst_port; } tcp_udp_header_t; @@ -475,6 +570,11 @@ u32 icmp_match_in2out_det(snat_main_t *sm, vlib_node_runtime_t *node, 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_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, @@ -490,74 +590,55 @@ u32 icmp_match_out2in_det(snat_main_t *sm, vlib_node_runtime_t *node, 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_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); void increment_v4_address(ip4_address_t * a); -void snat_add_address(snat_main_t *sm, ip4_address_t *addr, u32 vrf_id); -int snat_del_address(snat_main_t *sm, ip4_address_t addr, u8 delete_sm); +int snat_add_address(snat_main_t *sm, ip4_address_t *addr, u32 vrf_id, + u8 twice_nat); +int snat_del_address(snat_main_t *sm, ip4_address_t addr, u8 delete_sm, + u8 twice_nat); +void nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add); 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); + u32 sw_if_index, snat_protocol_t proto, int is_add, + twice_nat_type_t twice_nat, u8 out2in_only, + u8 *tag); clib_error_t * snat_api_init(vlib_main_t * vm, snat_main_t * sm); int snat_set_workers (uword * bitmap); int snat_interface_add_del(u32 sw_if_index, u8 is_inside, int is_del); int snat_interface_add_del_output_feature(u32 sw_if_index, u8 is_inside, int is_del); -int snat_add_interface_address(snat_main_t *sm, u32 sw_if_index, int is_del); +int snat_add_interface_address(snat_main_t *sm, u32 sw_if_index, int is_del, + u8 twice_nat); uword unformat_snat_protocol(unformat_input_t * input, va_list * args); u8 * format_snat_protocol(u8 * s, va_list * args); int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port, - snat_protocol_t proto, u32 vrf_id, - nat44_lb_addr_port_t *locals, u8 is_add); + snat_protocol_t proto, + nat44_lb_addr_port_t *locals, u8 is_add, + twice_nat_type_t twice_nat, u8 out2in_only, + u8 *tag); int nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port, snat_protocol_t proto, u32 vrf_id, int is_in); - -static_always_inline u8 -icmp_is_error_message (icmp46_header_t * icmp) -{ - switch(icmp->type) - { - case ICMP4_destination_unreachable: - case ICMP4_time_exceeded: - case ICMP4_parameter_problem: - case ICMP4_source_quench: - case ICMP4_redirect: - case ICMP4_alternate_host_address: - return 1; - } - return 0; -} - -static_always_inline u8 -is_interface_addr(snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index0, - u32 ip4_addr) -{ - snat_runtime_t *rt = (snat_runtime_t *) node->runtime_data; - ip4_address_t * first_int_addr; - - if (PREDICT_FALSE(rt->cached_sw_if_index != sw_if_index0)) - { - first_int_addr = - ip4_interface_first_address (sm->ip4_main, sw_if_index0, - 0 /* just want the address */); - rt->cached_sw_if_index = sw_if_index0; - if (first_int_addr) - rt->cached_ip4_address = first_int_addr->as_u32; - else - rt->cached_ip4_address = 0; - } - - if (PREDICT_FALSE(ip4_addr == rt->cached_ip4_address)) - return 1; - else - return 0; -} - -always_inline u8 -maximum_sessions_exceeded (snat_main_t *sm, u32 thread_index) -{ - if (pool_elts (sm->per_thread_data[thread_index].sessions) >= sm->max_translations) - return 1; - - return 0; -} - -#endif /* __included_nat_h__ */ +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); +void nat_free_session_data (snat_main_t * sm, snat_session_t * s, + u32 thread_index); +snat_user_t * nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr, + u32 fib_index, u32 thread_index); +snat_session_t * nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u, + u32 thread_index); +snat_session_t * nat_ed_session_alloc (snat_main_t *sm, snat_user_t *u, + u32 thread_index); +void nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, + u16 psid_length); +void nat_set_alloc_addr_and_port_default (void); +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); + +#endif /* __included_snat_h__ */