{
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];
};
};
} snat_user_key_t;
-typedef struct {
- union
- {
- struct
- {
- ip4_address_t addr;
- u16 port;
- u16 fib_index;
- };
- u64 as_u64;
- };
-} snat_worker_key_t;
-
#define foreach_snat_protocol \
_(UDP, 0, udp, "udp") \
#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 NAT_INTERFACE_FLAG_IS_INSIDE 1
+#define NAT_INTERFACE_FLAG_IS_OUTSIDE 2
typedef CLIB_PACKED(struct {
snat_session_key_t out2in; /* 0-15 */
/* 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 hos address and port after translation */
+ ip4_address_t ext_host_nat_addr; /* 74-77 */
+ u16 ext_host_nat_port; /* 78-79 */
}) snat_session_t;
u16 local_port;
u16 external_port;
u8 addr_only;
+ u8 twice_nat;
+ u8 out2in_only;
u32 vrf_id;
u32 fib_index;
snat_protocol_t proto;
+ u32 worker_index;
nat44_lb_addr_port_t *locals;
} snat_static_mapping_t;
typedef struct {
u32 sw_if_index;
- u8 is_inside;
+ u8 flags;
} snat_interface_t;
typedef struct {
u32 vrf_id;
snat_protocol_t proto;
int addr_only;
+ int twice_nat;
int is_add;
} snat_static_map_resolve_t;
typedef struct {
+ /* Main lookup tables */
+ clib_bihash_8_8_t out2in;
+ clib_bihash_8_8_t in2out;
+
+ /* Find-a-user => src address lookup */
+ clib_bihash_8_8_t user_hash;
+
/* User pool */
snat_user_t * users;
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,
typedef u32 (snat_get_worker_function_t) (ip4_header_t * ip, u32 rx_fib_index);
-typedef struct snat_main_s {
- /* Main lookup tables */
- clib_bihash_8_8_t out2in;
- clib_bihash_8_8_t in2out;
+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 {
/* Endpoint address 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;
-
- /* Non-translated packets worker lookup => src address + VRF */
- clib_bihash_8_8_t worker_by_in;
-
- /* Translated packets worker lookup => IP address + port number */
- clib_bihash_8_8_t worker_by_out;
-
snat_icmp_match_function_t * icmp_match_in2out_cb;
snat_icmp_match_function_t * icmp_match_out2in_cb;
/* 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 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;
/* 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;
u32 translation_buckets;
u32 translation_memory_size;
+ u32 max_translations;
u32 user_buckets;
u32 user_memory_size;
u32 max_translations_per_user;
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;
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,
+void snat_free_outside_address_and_port (snat_address_t * addresses,
u32 thread_index,
snat_session_key_t * k,
u32 address_index);
-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,
+ u8 *twice_nat);
void snat_add_del_addr_to_fib (ip4_address_t * addr,
u8 p_len,
@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 endpoint dependent.
+ @param s NAT session
+ @return 1 if NAT session is endpoint dependent
+*/
+#define is_ed_session(s) (snat_is_unk_proto_session (s) || is_twice_nat_session (s) || is_lb_session (s))
+
+#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
/*
* Why is this here? Because we don't need to touch this layer to
} tcp_udp_header_t;
u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0, u8 *p_proto,
+ 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, u8 *p_proto,
+ 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, u8 *p_proto,
+ 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, u8 *p_proto,
+ 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, u8 *p_proto,
+ 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_det(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0, u8 *p_proto,
+ 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);
+void 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,
+ u8 twice_nat);
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);
+ nat44_lb_addr_port_t *locals, u8 is_add,
+ u8 twice_nat, u8 out2in_only);
+int nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
+ snat_protocol_t 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);
static_always_inline u8
icmp_is_error_message (icmp46_header_t * icmp)
return 0;
}
-#endif /* __included_nat_h__ */
+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;
+}
+
+static_always_inline void
+nat_send_all_to_node(vlib_main_t *vm, u32 *bi_vector,
+ vlib_node_runtime_t *node, vlib_error_t *error, u32 next)
+{
+ u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
+
+ from = bi_vector;
+ n_left_from = vec_len(bi_vector);
+ next_index = node->cached_next_index;
+ while (n_left_from > 0) {
+ vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
+ while (n_left_from > 0 && n_left_to_next > 0) {
+ u32 bi0 = to_next[0] = from[0];
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+ vlib_buffer_t *p0 = vlib_get_buffer(vm, bi0);
+ p0->error = *error;
+ vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
+ n_left_to_next, bi0, next);
+ }
+ vlib_put_next_frame(vm, node, next_index, n_left_to_next);
+ }
+}
+
+#endif /* __included_snat_h__ */