/* default number of worker handoff frame queue elements */
#define NAT_FQ_NELTS_DEFAULT 64
+/* number of attempts to get a port for ED overloading algorithm, if rolling
+ * a dice this many times doesn't produce a free port, it's treated
+ * as if there were no free ports available to conserve resources */
+#define ED_PORT_ALLOC_ATTEMPTS (10)
+
/* NAT buffer flags */
#define SNAT_FLAG_HAIRPINNING (1 << 0)
/* 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)
u16 port;
} in2out;
- nat_protocol_t nat_proto;
+ ip_protocol_t proto;
nat_6t_flow_t i2o;
nat_6t_flow_t o2i;
typedef struct
{
ip4_address_t addr;
+ ip4_address_t net;
+ u32 sw_if_index;
u32 fib_index;
-#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 _
+ u32 addr_len;
} snat_address_t;
typedef struct
typedef struct
{
- /* prefered pool address */
+ /* preferred pool address */
ip4_address_t pool_addr;
/* local IP address */
ip4_address_t local_addr;
u32 vrf_id;
u32 fib_index;
/* protocol */
- nat_protocol_t proto;
+ ip_protocol_t proto;
/* 0 = disabled, otherwise client IP affinity sticky time in seconds */
u32 affinity;
/* worker threads used by backends/local host */
u16 e_port;
u32 sw_if_index;
u32 vrf_id;
- nat_protocol_t proto;
+ ip_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;
/* Return worker thread index for given packet */
/* 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);
+typedef int (nat_alloc_out_addr_and_port_function_t) (
+ snat_address_t *addresses, u32 fib_index, u32 thread_index,
+ ip_protocol_t proto, ip4_address_t *addr, u16 *port, u16 port_per_thread,
+ u32 snat_thread_index);
typedef struct snat_main_s
{
/* 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;
+ // broken api backward compatibility
+ snat_interface_t *output_feature_dummy_interfaces;
/* Vector of outside addresses */
snat_address_t *addresses;
+ /* 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;
+
/* Address and port allocation function */
nat_alloc_out_addr_and_port_function_t *alloc_addr_and_port;
/* Address and port allocation type */
/* 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;
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
+ @return true 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)
+always_inline bool
+nat44_ed_is_session_static (snat_session_t *s)
+{
+ return s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING;
+}
/** \brief Check if NAT session is twice NAT.
@param s NAT session
- @return 1 if NAT session is twice NAT
+ @return true if NAT session is twice NAT
*/
-#define is_twice_nat_session(s) (s->flags & SNAT_SESSION_FLAG_TWICE_NAT)
+always_inline bool
+nat44_ed_is_twice_nat_session (snat_session_t *s)
+{
+ return 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
+ @return true if NAT session is load-balancing
*/
-#define is_lb_session(s) (s->flags & SNAT_SESSION_FLAG_LOAD_BALANCING)
+always_inline bool
+nat44_ed_is_lb_session (snat_session_t *s)
+{
+ return 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
+ @return true if NAT session is load-balancing
*/
-#define is_ed_session(s) (s->flags & SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT)
+always_inline bool
+na44_ed_is_fwd_bypass_session (snat_session_t *s)
+{
+ return s->flags & SNAT_SESSION_FLAG_FWD_BYPASS;
+}
/** \brief Check if NAT session has affinity record.
@param s NAT session
- @return 1 if NAT session has affinity record
+ @return true if NAT session has affinity record
*/
-#define is_affinity_sessions(s) (s->flags & SNAT_SESSION_FLAG_AFFINITY)
+always_inline bool
+nat44_ed_is_affinity_session (snat_session_t *s)
+{
+ return 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
+ @return true if exact pool address
*/
-#define is_exact_address_session(s) (s->flags & SNAT_SESSION_FLAG_EXACT_ADDRESS)
+always_inline bool
+nat44_ed_is_exact_address_session (snat_session_t *s)
+{
+ return s->flags & SNAT_SESSION_FLAG_EXACT_ADDRESS;
+}
/** \brief Check if NAT interface is inside.
@param i NAT interface
- @return 1 if inside interface
+ @return true if inside interface
*/
-#define nat_interface_is_inside(i) i->flags & NAT_INTERFACE_FLAG_IS_INSIDE
+always_inline bool
+nat44_ed_is_interface_inside (snat_interface_t *i)
+{
+ return i->flags & NAT_INTERFACE_FLAG_IS_INSIDE;
+}
/** \brief Check if NAT interface is outside.
@param i NAT interface
- @return 1 if outside interface
+ @return true if outside interface
*/
-#define nat_interface_is_outside(i) i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE
+always_inline bool
+nat44_ed_is_interface_outside (snat_interface_t *i)
+{
+ return 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
+ @return true if session is closed
*/
-#define nat44_is_ses_closed(s) s->state == 0xf
+always_inline bool
+nat44_is_ses_closed (snat_session_t *s)
+{
+ return s->state == 0xf;
+}
/** \brief Check if client initiating TCP connection (received SYN from client)
@param t TCP header
- @return 1 if client initiating TCP connection
+ @return true if client initiating TCP connection
*/
always_inline bool
tcp_flags_is_init (u8 f)
#define nat_log_debug(...)\
vlib_log(VLIB_LOG_LEVEL_DEBUG, snat_main.log_class, __VA_ARGS__)
+clib_error_t *nat44_api_hookup (vlib_main_t *vm);
+
+int snat_set_workers (uword *bitmap);
+
+int nat44_plugin_enable (nat44_config_t c);
+int nat44_plugin_disable ();
+
+int nat44_ed_add_interface (u32 sw_if_index, u8 is_inside);
+int nat44_ed_del_interface (u32 sw_if_index, u8 is_inside);
+int nat44_ed_add_output_interface (u32 sw_if_index);
+int nat44_ed_del_output_interface (u32 sw_if_index);
+
+int nat44_ed_add_address (ip4_address_t *addr, u32 vrf_id, u8 twice_nat);
+int nat44_ed_del_address (ip4_address_t addr, u8 delete_sm, u8 twice_nat);
+int nat44_ed_add_interface_address (u32 sw_if_index, u8 twice_nat);
+int nat44_ed_del_interface_address (u32 sw_if_index, u8 twice_nat);
+
int nat44_ed_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
- u16 l_port, u16 e_port, nat_protocol_t proto,
+ u16 l_port, u16 e_port, ip_protocol_t proto,
u32 vrf_id, u32 sw_if_index, u32 flags,
ip4_address_t pool_addr, u8 *tag);
int nat44_ed_del_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
- u16 l_port, u16 e_port, nat_protocol_t proto,
+ u16 l_port, u16 e_port, ip_protocol_t proto,
u32 vrf_id, u32 sw_if_index, u32 flags);
int nat44_ed_add_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
- nat_protocol_t proto,
+ ip_protocol_t proto,
nat44_lb_addr_port_t *locals, u32 flags,
u8 *tag, u32 affinity);
int nat44_ed_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
- nat_protocol_t proto, u32 flags);
+ ip_protocol_t proto, u32 flags);
int nat44_ed_add_del_lb_static_mapping_local (ip4_address_t e_addr, u16 e_port,
ip4_address_t l_addr, u16 l_port,
- nat_protocol_t proto, u32 vrf_id,
+ ip_protocol_t proto, u32 vrf_id,
u8 probability, u8 is_add);
-/**
- * @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);
-
-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);
-
-int nat44_ed_add_interface (u32 sw_if_index, u8 is_inside);
-int nat44_ed_del_interface (u32 sw_if_index, u8 is_inside);
-int nat44_ed_add_output_interface (u32 sw_if_index);
-int nat44_ed_del_output_interface (u32 sw_if_index);
-
-/**
- * @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
*
*
* @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,
+int nat44_ed_del_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);
+void nat44_ed_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)
*/
int nat44_update_session_limit (u32 session_limit, u32 vrf_id);
-/**
- * @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);
/**
*/
int snat_static_mapping_match (
vlib_main_t *vm, snat_main_t *sm, ip4_address_t match_addr, u16 match_port,
- u32 match_fib_index, nat_protocol_t match_protocol,
+ u32 match_fib_index, ip_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,
+ int 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);
-
-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
nat_translation_error_e nat_6t_flow_buf_translate_i2o (
vlib_main_t *vm, 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);
+ nat_6t_flow_t *f, ip_protocol_t proto, int is_output_feature);
nat_translation_error_e nat_6t_flow_buf_translate_o2i (
vlib_main_t *vm, 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);
+ nat_6t_flow_t *f, ip_protocol_t proto, int is_output_feature);
void nat_6t_l3_l4_csum_calc (nat_6t_flow_t *f);
format_function_t format_nat_6t_flow;
format_function_t format_ed_session_kvp;
+snat_static_mapping_t *nat44_ed_sm_i2o_lookup (snat_main_t *sm,
+ ip4_address_t addr, u16 port,
+ u32 fib_index, u8 proto);
+
+snat_static_mapping_t *nat44_ed_sm_o2i_lookup (snat_main_t *sm,
+ ip4_address_t addr, u16 port,
+ u32 fib_index, u8 proto);
+
+void nat_syslog_nat44_sadd (u32 ssubix, u32 sfibix, ip4_address_t *isaddr,
+ u16 isport, ip4_address_t *idaddr, u16 idport,
+ ip4_address_t *xsaddr, u16 xsport,
+ ip4_address_t *xdaddr, u16 xdport, u8 proto,
+ u8 is_twicenat);
+
+void nat_syslog_nat44_sdel (u32 ssubix, u32 sfibix, ip4_address_t *isaddr,
+ u16 isport, ip4_address_t *idaddr, u16 idport,
+ ip4_address_t *xsaddr, u16 xsport,
+ ip4_address_t *xdaddr, u16 xdport, u8 proto,
+ u8 is_twicenat);
+
#endif /* __included_nat44_ed_h__ */
/*
* fd.io coding-style-patch-verification: ON
Code Review / vpp.git / blobdiff