#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>
+
+#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 SNAT_FLAG_HAIRPINNING (1 << 0)
+
/* Key */
typedef struct {
union
};
} snat_session_key_t;
+typedef struct {
+ union
+ {
+ struct
+ {
+ ip4_address_t l_addr;
+ ip4_address_t r_addr;
+ u32 fib_index;
+ u8 proto;
+ u8 rsvd[3];
+ };
+ u64 as_u64[2];
+ };
+} snat_unk_proto_ses_key_t;
+
+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;
+
typedef struct {
union
{
} snat_protocol_t;
+#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_LAST_ACK, "tcp-last-ack") \
+ _(7, ICMP_ACTIVE, "icmp-active")
+
+typedef enum {
+#define _(v, N, s) SNAT_SESSION_##N = v,
+ foreach_snat_session_state
+#undef _
+} snat_session_state_t;
+
+
#define SNAT_SESSION_FLAG_STATIC_MAPPING 1
+#define SNAT_SESSION_FLAG_UNKNOWN_PROTO 2
typedef CLIB_PACKED(struct {
snat_session_key_t out2in; /* 0-15 */
/* Outside address */
u32 outside_address_index; /* 64-67 */
+ /* External host address */
+ ip4_address_t ext_host_addr; /* 68-71 */
+
}) snat_session_t;
typedef struct {
ip4_address_t addr;
+ u32 fib_index;
u32 sessions_per_user_list_head_index;
u32 nsessions;
u32 nstaticsessions;
typedef struct {
ip4_address_t addr;
+ u32 fib_index;
#define _(N, i, n, s) \
u32 busy_##n##_ports; \
uword * busy_##n##_port_bitmap;
#undef _
} snat_address_t;
+typedef struct {
+ u16 in_port;
+ snat_det_out_key_t out;
+ u8 state;
+ u32 expire;
+} snat_det_session_t;
+
+typedef struct {
+ ip4_address_t in_addr;
+ u8 in_plen;
+ ip4_address_t out_addr;
+ u8 out_plen;
+ u32 sharing_ratio;
+ u16 ports_per_host;
+ u32 ses_num;
+ /* vector of sessions */
+ snat_det_session_t * sessions;
+} snat_det_map_t;
+
typedef struct {
ip4_address_t local_addr;
ip4_address_t external_addr;
dlist_elt_t * list_pool;
} snat_main_per_thread_data_t;
-typedef struct {
+struct snat_main_s;
+
+typedef u32 snat_icmp_match_function_t (struct snat_main_s *sm,
+ vlib_node_runtime_t *node,
+ u32 thread_index,
+ vlib_buffer_t *b0,
+ u8 *p_proto,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate,
+ void *d,
+ void *e);
+
+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;
+ /* Unknown protocol sessions lookup tables */
+ clib_bihash_16_8_t out2in_unk_proto;
+ clib_bihash_16_8_t in2out_unk_proto;
+
/* Find-a-user => src address lookup */
clib_bihash_8_8_t user_hash;
/* 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;
+
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;
/* Per thread data */
snat_main_per_thread_data_t * per_thread_data;
/* Interface pool */
snat_interface_t * interfaces;
+ snat_interface_t * output_feature_interfaces;
/* Vector of outside addresses */
snat_address_t * addresses;
/* Worker handoff index */
u32 fq_in2out_index;
+ u32 fq_in2out_output_index;
u32 fq_out2in_index;
+ /* in2out and out2in node index */
+ u32 in2out_node_index;
+ u32 in2out_output_node_index;
+ u32 out2in_node_index;
+
+ /* Deterministic NAT */
+ snat_det_map_t * det_maps;
+
/* Config parameters */
u8 static_mapping_only;
u8 static_mapping_connection_tracking;
+ u8 deterministic;
u32 translation_buckets;
u32 translation_memory_size;
u32 user_buckets;
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;
+ u32 tcp_transitory_timeout;
+ u32 icmp_timeout;
+
/* API message ID base */
u16 msg_id_base;
vnet_main_t * vnet_main;
ip4_main_t * ip4_main;
ip_lookup_main_t * ip4_lookup_main;
- ethernet_main_t * ethernet_main;
api_main_t * api_main;
} snat_main_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;
void snat_free_outside_address_and_port (snat_main_t * sm,
snat_session_key_t * k,
u32 address_index);
int snat_alloc_outside_address_and_port (snat_main_t * sm,
+ u32 fib_index,
snat_session_key_t * k,
u32 * address_indexp);
int snat_static_mapping_match (snat_main_t * sm,
snat_session_key_t match,
snat_session_key_t * mapping,
- u8 by_external);
+ u8 by_external,
+ u8 *is_addr_only);
+
+void snat_add_del_addr_to_fib (ip4_address_t * addr,
+ u8 p_len,
+ u32 sw_if_index,
+ int is_add);
format_function_t format_snat_user;
*/
#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
+
/*
* 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
u16 sequence;
} icmp_echo_header_t;
-always_inline snat_protocol_t
+always_inline u32
ip_proto_to_snat_proto (u8 ip_proto)
{
- snat_protocol_t snat_proto = ~0;
+ 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;
}
return ip_proto;
}
+typedef struct {
+ u16 src_port, dst_port;
+} 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,
+ 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,
+ 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,
+ 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,
+ 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,
+ 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,
+ 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_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);
+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);
+uword unformat_snat_protocol(unformat_input_t * input, va_list * args);
+u8 * format_snat_protocol(u8 * s, va_list * args);
+
+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;
+}
+
#endif /* __included_snat_h__ */
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